From 200c494a5559b9f94a40593f63714bbdde436589 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Thu, 4 Jun 2020 15:15:09 +0200
Subject: [PATCH 01/23] get this little experiment started

for now all it does is crash
---
 src/frontend/qt_sdl/CMakeLists.txt |  4 +-
 src/frontend/qt_sdl/LAN_Socket.cpp | 96 +++++++++++++++++++++++++++---
 src/frontend/qt_sdl/main.cpp       |  4 +-
 3 files changed, 93 insertions(+), 11 deletions(-)

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 62d6e601..75dfbe2d 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -88,14 +88,14 @@ if (UNIX)
 				--generate-header "${CMAKE_SOURCE_DIR}/melon_grc.xml")
 
 	if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-		target_link_libraries(melonDS dl Qt5::Core Qt5::Gui Qt5::Widgets)
+		target_link_libraries(melonDS dl slirp Qt5::Core Qt5::Gui Qt5::Widgets)
 	endif ()
 
 	target_sources(melonDS PUBLIC melon_grc.c)
 elseif (WIN32)
 	target_sources(melonDS PUBLIC "${CMAKE_SOURCE_DIR}/melon.rc")
 	
-	target_link_libraries(melonDS comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32)
+	target_link_libraries(melonDS comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32 slirp.dll)
 	if (BUILD_STATIC)
 		target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd)
 	else()
diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index c6fbd4b6..110c4439 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -25,6 +25,8 @@
 #include "LAN_Socket.h"
 #include "../Config.h"
 
+#include <slirp/libslirp.h>
+
 #ifdef __WIN32__
 	#include <winsock2.h>
 	#include <ws2tcpip.h>
@@ -105,13 +107,58 @@ UDPSocket UDPSocketList[4];
 int UDPSocketID = 0;
 
 
+Slirp* Ctx;
+
+
+struct timespec { long tv_sec; long tv_nsec; };    //header part
+#define CLOCK_MONOTONIC 1312
+int clock_gettime(int, struct timespec *spec)      //C-file part
+{  __int64 wintime; GetSystemTimeAsFileTime((FILETIME*)&wintime);
+   wintime      -=116444736000000000LL;  //1jan1601 to 1jan1970
+   spec->tv_sec  =wintime / 10000000LL;           //seconds
+   spec->tv_nsec =wintime % 10000000LL *100;      //nano-seconds
+   return 0;
+}
+
+
+ssize_t fart(const void *buf, size_t len, void *opaque)
+{
+    printf("slirp fart %d\n", len);
+}
+
+void fart_guest_error(const char *msg, void *opaque){printf("guesterror %s\n", msg);}
+/* Return the virtual clock value in nanoseconds */
+int64_t fart_clock_get_ns(void *opaque)
+{
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return ts.tv_sec * 1000000000LL + ts.tv_nsec;
+}
+/* Create a new timer with the given callback and opaque data */
+void *fart_timer_new(SlirpTimerCb cb, void *cb_opaque, void *opaque)
+{
+    printf("TIMER SHITO!!\n");return nullptr;
+}
+/* Remove and free a timer */
+void fart_timer_free(void *timer, void *opaque){printf("timerfree\n");}
+/* Modify a timer to expire at @expire_time */
+void fart_timer_mod(void *timer, int64_t expire_time, void *opaque){printf("timermod\n");}
+/* Register a fd for future polling */
+void fart_register_poll_fd(int fd, void *opaque){printf("registerpoll\n");}
+/* Unregister a fd */
+void fart_unregister_poll_fd(int fd, void *opaque){printf("unregisterpoll\n");}
+/* Kick the io-thread, to signal that new events may be processed */
+void fart_notify(void *opaque){printf("nofiy\n");}
+
+SlirpCb cb;
+
 bool Init()
 {
     // TODO: how to deal with cases where an adapter is unplugged or changes config??
     //if (PCapLib) return true;
 
     //Lib = NULL;
-    PacketLen = 0;
+    /*PacketLen = 0;
     RXNum = 0;
 
     IPv4ID = 1;
@@ -121,12 +168,40 @@ bool Init()
 
     UDPSocketID = 0;
 
+    return true;*/
+
+    SlirpConfig cfg;
+    memset(&cfg, 0, sizeof(cfg));
+    cfg.version = 1;
+
+    cfg.in_enabled = true;
+    *(u32*)&cfg.vnetwork = kClientIP;
+    *(u32*)&cfg.vnetmask = 0xFFFFFF00;
+    *(u32*)&cfg.vhost = kServerIP;
+    cfg.vhostname = "melon";
+    //cfg.vdhcp_start.S_addr = kServerIP;
+
+
+    memset(&cb, 0, sizeof(cb));
+
+    cb.send_packet = fart;
+    cb.guest_error = fart_guest_error;
+    cb.clock_get_ns = fart_clock_get_ns;
+    cb.timer_new = fart_timer_new;
+    cb.timer_free = fart_timer_free;
+    cb.timer_mod = fart_timer_mod;
+    cb.register_poll_fd = fart_register_poll_fd;
+    cb.unregister_poll_fd = fart_unregister_poll_fd;
+    cb.notify = fart_notify;
+
+    Ctx = slirp_new(&cfg, &cb, nullptr);
+
     return true;
 }
 
 void DeInit()
 {
-    for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
+    /*for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
     {
         TCPSocket* sock = &TCPSocketList[i];
         if (sock->Backend) closesocket(sock->Backend);
@@ -136,7 +211,9 @@ void DeInit()
     {
         UDPSocket* sock = &UDPSocketList[i];
         if (sock->Backend) closesocket(sock->Backend);
-    }
+    }*/
+
+    slirp_cleanup(Ctx);
 }
 
 
@@ -1041,13 +1118,17 @@ int SendPacket(u8* data, int len)
         return 0;
     }
 
-    HandlePacket(data, len);
+    u16 ethertype = ntohs(*(u16*)&data[0xC]);
+    printf("packet of type %04X\n", ethertype);
+
+    //HandlePacket(data, len);
+    slirp_input(Ctx, data, len);
     return len;
 }
 
 int RecvPacket(u8* data)
 {
-    int ret = 0;
+    /*int ret = 0;
     if (RXNum > 0)
     {
         memcpy(data, PacketBuffer, PacketLen);
@@ -1100,7 +1181,7 @@ int RecvPacket(u8* data)
                 printf("%02X ", recvbuf[k+j]);
             }
             printf("\n");
-        }*/
+        }*-/
 
         //recvlen = recv(sock->Backend, (char*)recvbuf, 1024, 0);
         //if (recvlen == 0) printf("it closed immediately after\n");
@@ -1137,8 +1218,9 @@ int RecvPacket(u8* data)
 
         printf("UDP: socket %d receiving %d bytes\n", i, recvlen);
         UDP_BuildIncomingFrame(sock, recvbuf, recvlen);
-    }
+    }*/
 
+    int ret = 0;
     return ret;
 }
 
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index fa542ad2..f1b31b30 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -2071,12 +2071,12 @@ int CALLBACK WinMain(HINSTANCE hinst, HINSTANCE hprev, LPSTR cmdline, int cmdsho
 
     if (argv_w) LocalFree(argv_w);
 
-    if (AttachConsole(ATTACH_PARENT_PROCESS))
+    /*if (AttachConsole(ATTACH_PARENT_PROCESS))
     {
         freopen("CONOUT$", "w", stdout);
         freopen("CONOUT$", "w", stderr);
         printf("\n");
-    }
+    }*/
 
     int ret = main(argc, argv);
 

From a29e64534073fa670447958729207f78071ecce5 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Fri, 5 Jun 2020 19:12:03 +0200
Subject: [PATCH 02/23] get somewhere

---
 src/frontend/qt_sdl/LAN_Socket.cpp | 292 ++++++++++++++++++++++++-----
 1 file changed, 242 insertions(+), 50 deletions(-)

diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 110c4439..97a36e41 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -25,6 +25,8 @@
 #include "LAN_Socket.h"
 #include "../Config.h"
 
+#include <list>
+
 #include <slirp/libslirp.h>
 
 #ifdef __WIN32__
@@ -109,48 +111,131 @@ int UDPSocketID = 0;
 
 Slirp* Ctx;
 
+const int FDListMax = 64;
+struct pollfd FDList[FDListMax];
+int FDListSize;
 
-struct timespec { long tv_sec; long tv_nsec; };    //header part
+
+#ifdef __WIN32__
+
+#define poll WSAPoll
+
+// https://stackoverflow.com/questions/5404277/porting-clock-gettime-to-windows
+
+struct timespec { long tv_sec; long tv_nsec; };
 #define CLOCK_MONOTONIC 1312
-int clock_gettime(int, struct timespec *spec)      //C-file part
-{  __int64 wintime; GetSystemTimeAsFileTime((FILETIME*)&wintime);
-   wintime      -=116444736000000000LL;  //1jan1601 to 1jan1970
-   spec->tv_sec  =wintime / 10000000LL;           //seconds
-   spec->tv_nsec =wintime % 10000000LL *100;      //nano-seconds
-   return 0;
-}
 
-
-ssize_t fart(const void *buf, size_t len, void *opaque)
+int clock_gettime(int, struct timespec *spec)
 {
-    printf("slirp fart %d\n", len);
+    __int64 wintime;
+    GetSystemTimeAsFileTime((FILETIME*)&wintime);
+    wintime -=116444736000000000LL;                 //1jan1601 to 1jan1970
+    spec->tv_sec  = wintime / 10000000LL;           //seconds
+    spec->tv_nsec = wintime % 10000000LL * 100;     //nano-seconds
+    return 0;
 }
 
-void fart_guest_error(const char *msg, void *opaque){printf("guesterror %s\n", msg);}
-/* Return the virtual clock value in nanoseconds */
-int64_t fart_clock_get_ns(void *opaque)
+#endif // __WIN32__
+
+
+ssize_t SlirpCbSendPacket(const void* buf, size_t len, void* opaque)
+{
+    if (len > 2048)
+    {
+        printf("slirp: packet too big (%d)\n", len);
+        return 0;
+    }
+
+    printf("slirp: response packet of %d bytes, type %04X\n", len, ntohs(((u16*)buf)[6]));
+
+    PacketLen = len;
+    memcpy(PacketBuffer, buf, PacketLen);
+    RXNum = 1;
+
+    return len;
+}
+
+void SlirpCbGuestError(const char* msg, void* opaque)
+{
+    printf("SLIRP: error: %s\n", msg);
+}
+
+int64_t SlirpCbClockGetNS(void* opaque)
 {
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return ts.tv_sec * 1000000000LL + ts.tv_nsec;
 }
-/* Create a new timer with the given callback and opaque data */
-void *fart_timer_new(SlirpTimerCb cb, void *cb_opaque, void *opaque)
-{
-    printf("TIMER SHITO!!\n");return nullptr;
-}
-/* Remove and free a timer */
-void fart_timer_free(void *timer, void *opaque){printf("timerfree\n");}
-/* Modify a timer to expire at @expire_time */
-void fart_timer_mod(void *timer, int64_t expire_time, void *opaque){printf("timermod\n");}
-/* Register a fd for future polling */
-void fart_register_poll_fd(int fd, void *opaque){printf("registerpoll\n");}
-/* Unregister a fd */
-void fart_unregister_poll_fd(int fd, void *opaque){printf("unregisterpoll\n");}
-/* Kick the io-thread, to signal that new events may be processed */
-void fart_notify(void *opaque){printf("nofiy\n");}
 
-SlirpCb cb;
+void* SlirpCbTimerNew(SlirpTimerCb cb, void* cb_opaque, void* opaque)
+{
+    return nullptr;
+}
+
+void SlirpCbTimerFree(void* timer, void* opaque)
+{
+}
+
+void SlirpCbTimerMod(void* timer, int64_t expire_time, void* opaque)
+{
+}
+
+void SlirpCbRegisterPollFD(int fd, void* opaque)
+{
+    printf("Slirp: register poll FD %d\n", fd);
+
+    if (FDListSize >= FDListMax)
+    {
+        printf("!! SLIRP FD LIST FULL\n");
+        return;
+    }
+
+    for (int i = 0; i < FDListSize; i++)
+    {
+        if (FDList[i].fd == fd) return;
+    }
+
+    FDList[FDListSize].fd = fd;
+    FDListSize++;
+}
+
+void SlirpCbUnregisterPollFD(int fd, void* opaque)
+{
+    printf("Slirp: unregister poll FD %d\n", fd);
+
+    if (FDListSize < 1)
+    {
+        printf("!! SLIRP FD LIST EMPTY\n");
+        return;
+    }
+
+    for (int i = 0; i < FDListSize; i++)
+    {
+        if (FDList[i].fd == fd)
+        {
+            FDListSize--;
+            FDList[i] = FDList[FDListSize];
+        }
+    }
+}
+
+void SlirpCbNotify(void* opaque)
+{
+    //
+}
+
+SlirpCb cb =
+{
+    .send_packet = SlirpCbSendPacket,
+    .guest_error = SlirpCbGuestError,
+    .clock_get_ns = SlirpCbClockGetNS,
+    .timer_new = SlirpCbTimerNew,
+    .timer_free = SlirpCbTimerFree,
+    .timer_mod = SlirpCbTimerMod,
+    .register_poll_fd = SlirpCbRegisterPollFD,
+    .unregister_poll_fd = SlirpCbUnregisterPollFD,
+    .notify = SlirpCbNotify
+};
 
 bool Init()
 {
@@ -170,30 +255,22 @@ bool Init()
 
     return true;*/
 
+    FDListSize = 0;
+    memset(FDList, 0, sizeof(FDList));
+
     SlirpConfig cfg;
     memset(&cfg, 0, sizeof(cfg));
     cfg.version = 1;
 
     cfg.in_enabled = true;
-    *(u32*)&cfg.vnetwork = kClientIP;
-    *(u32*)&cfg.vnetmask = 0xFFFFFF00;
-    *(u32*)&cfg.vhost = kServerIP;
-    cfg.vhostname = "melon";
+    *(u32*)&cfg.vnetwork = htonl(kSubnet);
+    *(u32*)&cfg.vnetmask = htonl(0xFFFFFF00);
+    *(u32*)&cfg.vhost = htonl(kServerIP);
+    cfg.vhostname = "melonServer";
+    *(u32*)&cfg.vdhcp_start = htonl(kClientIP);
+    *(u32*)&cfg.vnameserver = htonl(kDNSIP);
     //cfg.vdhcp_start.S_addr = kServerIP;
 
-
-    memset(&cb, 0, sizeof(cb));
-
-    cb.send_packet = fart;
-    cb.guest_error = fart_guest_error;
-    cb.clock_get_ns = fart_clock_get_ns;
-    cb.timer_new = fart_timer_new;
-    cb.timer_free = fart_timer_free;
-    cb.timer_mod = fart_timer_mod;
-    cb.register_poll_fd = fart_register_poll_fd;
-    cb.unregister_poll_fd = fart_unregister_poll_fd;
-    cb.notify = fart_notify;
-
     Ctx = slirp_new(&cfg, &cb, nullptr);
 
     return true;
@@ -1121,14 +1198,130 @@ int SendPacket(u8* data, int len)
     u16 ethertype = ntohs(*(u16*)&data[0xC]);
     printf("packet of type %04X\n", ethertype);
 
+    if (ethertype == 0x0806)
+    {
+        u16 protocol = ntohs(*(u16*)&data[0x10]);
+        u16 op = ntohs(*(u16*)&data[0x14]);
+        u32 sourceip = ntohl(*(u32*)&data[0x26-4-6]);
+        u32 targetip = ntohl(*(u32*)&data[0x26]);
+        printf("ARP: protocol=%04X, op=%04X, source=%08X, target=%08X\n", protocol, op, sourceip, targetip);
+    }
+    else if (ethertype == 0x800)
+    {
+        u8 protocol = data[0x17];
+        if (protocol == 0x11) // UDP
+        {
+            u16 srcport = ntohs(*(u16*)&data[0x22]);
+            u16 dstport = ntohs(*(u16*)&data[0x24]);
+            if (srcport == 68 && dstport == 67) // DHCP
+            {
+                printf("LANMAGIC: DHCP packet\n");
+            }
+            else if (dstport == 53 && htonl(*(u32*)&data[0x1E]) == kDNSIP) // DNS
+            {
+                printf("LANMAGIC: DNS packet\n");
+                HandleDNSFrame(data, len);
+                return len;
+            }
+
+            printf("LANMAGIC: UDP packet %08X->%08X %d->%d\n", htonl(*(u32*)&data[0x1A]), htonl(*(u32*)&data[0x1E]), srcport, dstport);
+        }
+        else if (protocol == 0x06) // TCP
+        {
+            printf("LANMAGIC: TCP packet\n");
+
+            for (int i = 0; i < len; i++)
+            {
+                printf("%02X ", data[i]);
+                if ((i&0xF)==0xF) printf("\n");
+            }
+            printf("\n");
+        }
+        else
+            printf("LANMAGIC: unsupported IP protocol %02X\n", protocol);
+    }
+
     //HandlePacket(data, len);
     slirp_input(Ctx, data, len);
     return len;
 }
 
+int SlirpCbAddPoll(int fd, int events, void* opaque)
+{
+    int idx = -1;
+    for (int i = 0; i < FDListSize; i++)
+    {
+        if (FDList[i].fd == fd)
+        {
+            idx = i;
+            break;
+        }
+    }
+
+    if (idx == -1)
+    {
+        printf("SLIRP: ERROR! FD %d NOT REGISTERED\n", fd);
+        return -1;
+    }
+
+    //printf("Slirp: add poll: fd=%d, idx=%d, events=%08X\n", fd, idx, events);
+
+    u16 evt = 0;
+
+    if (events & SLIRP_POLL_IN) evt |= POLLIN;
+    if (events & SLIRP_POLL_OUT) evt |= POLLWRNORM;
+
+#ifndef __WIN32__
+    if (events & SLIRP_POLL_PRI) evt |= POLLPRI;
+    if (events & SLIRP_POLL_ERR) evt |= POLLERR;
+    if (events & SLIRP_POLL_HUP) evt |= POLLHUP;
+#endif // !__WIN32__
+
+    FDList[idx].events = evt;
+    return idx;
+}
+
+int SlirpCbGetREvents(int idx, void* opaque)
+{
+    if (idx < 0 || idx >= FDListSize)
+    {
+        printf("SLIRP: !! BAD FD INDEX %d (MAX %d)\n", idx, FDListSize);
+        return 0;
+    }
+
+    //printf("Slirp: get revents, idx=%d, res=%04X\n", idx, FDList[idx].revents);
+
+    u16 evt = FDList[idx].revents;
+    int ret = 0;
+
+    if (evt & POLLIN) ret |= SLIRP_POLL_IN;
+    if (evt & POLLWRNORM) ret |= SLIRP_POLL_OUT;
+    if (evt & POLLPRI) ret |= SLIRP_POLL_PRI;
+    if (evt & POLLERR) ret |= SLIRP_POLL_ERR;
+    if (evt & POLLHUP) ret |= SLIRP_POLL_HUP;
+
+    return ret;
+}
+
 int RecvPacket(u8* data)
 {
-    /*int ret = 0;
+    int ret = 0;
+
+    if (FDListSize > 0)
+    {
+        u32 timeout = 0;
+        slirp_pollfds_fill(Ctx, &timeout, SlirpCbAddPoll, nullptr);
+        int res = poll(FDList, FDListSize, timeout);
+        slirp_pollfds_poll(Ctx, res<0, SlirpCbGetREvents, nullptr);
+
+        /*struct pollfd derp = {0};;
+        derp.fd = FDList[0];
+        derp.events = POLLIN | POLLWRNORM;//POLLPRI | POLLIN | POLLWRNORM;
+        int res = poll(&derp, 1, 0);
+        if (res==SOCKET_ERROR) printf("fart: %d / %d\n", WSAGetLastError(), FDList[0]);
+        if(derp.revents) printf("derp: %04X\n", derp.revents);*/
+    }
+
     if (RXNum > 0)
     {
         memcpy(data, PacketBuffer, PacketLen);
@@ -1136,7 +1329,7 @@ int RecvPacket(u8* data)
         RXNum = 0;
     }
 
-    for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
+    /*for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
     {
         TCPSocket* sock = &TCPSocketList[i];
         if (sock->Status != 1) continue;
@@ -1220,7 +1413,6 @@ int RecvPacket(u8* data)
         UDP_BuildIncomingFrame(sock, recvbuf, recvlen);
     }*/
 
-    int ret = 0;
     return ret;
 }
 

From 4b73f81ee001115a0b59a3fe939f16181a9bde05 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Fri, 5 Jun 2020 20:20:03 +0200
Subject: [PATCH 03/23] clean it up

---
 src/frontend/qt_sdl/LAN_Socket.cpp | 910 +----------------------------
 1 file changed, 5 insertions(+), 905 deletions(-)

diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 97a36e41..6a3fa74d 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -21,34 +21,17 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <list>
 #include "../Wifi.h"
 #include "LAN_Socket.h"
 #include "../Config.h"
 
-#include <list>
-
 #include <slirp/libslirp.h>
 
 #ifdef __WIN32__
-	#include <winsock2.h>
 	#include <ws2tcpip.h>
-	#define socket_t    SOCKET
-	#define sockaddr_t  SOCKADDR
 #else
-	#include <unistd.h>
-	#include <arpa/inet.h>
-	#include <netinet/in.h>
-	#include <sys/types.h>
-	#include <sys/select.h>
 	#include <sys/socket.h>
-	#include <netdb.h>
-	#define socket_t    int
-	#define sockaddr_t  struct sockaddr
-	#define closesocket close
-#endif
-
-#ifndef INVALID_SOCKET
-#define INVALID_SOCKET  (socket_t)-1
 #endif
 
 
@@ -67,47 +50,7 @@ u8 PacketBuffer[2048];
 int PacketLen;
 volatile int RXNum;
 
-u16 IPv4ID;
-
-
-// TODO: UDP sockets
-// * use FIFO list
-// * assign new socket when seeing new IP/port
-
-
-typedef struct
-{
-    u8 DestIP[4];
-    u16 SourcePort;
-    u16 DestPort;
-
-    u32 SeqNum; // sequence number for incoming frames
-    u32 AckNum;
-
-    // 0: unused
-    // 1: connected
-    u8 Status;
-
-    socket_t Backend;
-
-} TCPSocket;
-
-typedef struct
-{
-    u8 DestIP[4];
-    u16 SourcePort;
-    u16 DestPort;
-
-    socket_t Backend;
-    struct sockaddr_in BackendAddr;
-
-} UDPSocket;
-
-TCPSocket TCPSocketList[16];
-UDPSocket UDPSocketList[4];
-
-int UDPSocketID = 0;
-
+u32 IPv4ID;
 
 Slirp* Ctx;
 
@@ -221,7 +164,6 @@ void SlirpCbUnregisterPollFD(int fd, void* opaque)
 
 void SlirpCbNotify(void* opaque)
 {
-    //
 }
 
 SlirpCb cb =
@@ -239,21 +181,7 @@ SlirpCb cb =
 
 bool Init()
 {
-    // TODO: how to deal with cases where an adapter is unplugged or changes config??
-    //if (PCapLib) return true;
-
-    //Lib = NULL;
-    /*PacketLen = 0;
-    RXNum = 0;
-
-    IPv4ID = 1;
-
-    memset(TCPSocketList, 0, sizeof(TCPSocketList));
-    memset(UDPSocketList, 0, sizeof(UDPSocketList));
-
-    UDPSocketID = 0;
-
-    return true;*/
+    IPv4ID = 0;
 
     FDListSize = 0;
     memset(FDList, 0, sizeof(FDList));
@@ -269,7 +197,6 @@ bool Init()
     cfg.vhostname = "melonServer";
     *(u32*)&cfg.vdhcp_start = htonl(kClientIP);
     *(u32*)&cfg.vnameserver = htonl(kDNSIP);
-    //cfg.vdhcp_start.S_addr = kServerIP;
 
     Ctx = slirp_new(&cfg, &cb, nullptr);
 
@@ -278,18 +205,6 @@ bool Init()
 
 void DeInit()
 {
-    /*for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
-    {
-        TCPSocket* sock = &TCPSocketList[i];
-        if (sock->Backend) closesocket(sock->Backend);
-    }
-
-    for (int i = 0; i < (sizeof(UDPSocketList)/sizeof(UDPSocket)); i++)
-    {
-        UDPSocket* sock = &UDPSocketList[i];
-        if (sock->Backend) closesocket(sock->Backend);
-    }*/
-
     slirp_cleanup(Ctx);
 }
 
@@ -333,165 +248,6 @@ void FinishUDPFrame(u8* data, int len)
     *(u16*)&udpheader[6] = htons(tmp);
 }
 
-void FinishTCPFrame(u8* data, int len)
-{
-    u8* ipheader = &data[0xE];
-    u8* tcpheader = &data[0x22];
-
-    // lengths
-    *(u16*)&ipheader[2] = htons(len - 0xE);
-
-    // IP checksum
-    u32 tmp = 0;
-
-    for (int i = 0; i < 20; i += 2)
-        tmp += ntohs(*(u16*)&ipheader[i]);
-    while (tmp >> 16)
-        tmp = (tmp & 0xFFFF) + (tmp >> 16);
-    tmp ^= 0xFFFF;
-    *(u16*)&ipheader[10] = htons(tmp);
-
-    u32 tcplen = ntohs(*(u16*)&ipheader[2]) - 0x14;
-
-    // TCP checksum
-    tmp = 0;
-    tmp += ntohs(*(u16*)&ipheader[12]);
-    tmp += ntohs(*(u16*)&ipheader[14]);
-    tmp += ntohs(*(u16*)&ipheader[16]);
-    tmp += ntohs(*(u16*)&ipheader[18]);
-    tmp += ntohs(0x0600);
-    tmp += tcplen;
-    for (u8* i = tcpheader; i < &tcpheader[tcplen-1]; i += 2)
-        tmp += ntohs(*(u16*)i);
-    if (tcplen & 1)
-        tmp += ntohs((u_short)tcpheader[tcplen-1]);
-    while (tmp >> 16)
-        tmp = (tmp & 0xFFFF) + (tmp >> 16);
-    tmp ^= 0xFFFF;
-    *(u16*)&tcpheader[16] = htons(tmp);
-}
-
-
-void HandleDHCPFrame(u8* data, int len)
-{
-    u8 type = 0xFF;
-
-    u32 transid = *(u32*)&data[0x2E];
-
-    u8* options = &data[0x11A];
-    for (;;)
-    {
-        if (options >= &data[len]) break;
-        u8 opt = *options++;
-        if (opt == 255) break;
-
-        u8 len = *options++;
-        switch (opt)
-        {
-        case 53: // frame type
-            type = options[0];
-            break;
-        }
-
-        options += len;
-    }
-
-    if (type == 0xFF)
-    {
-        printf("DHCP: bad frame\n");
-        return;
-    }
-
-    printf("DHCP: frame type %d, transid %08X\n", type, transid);
-
-    if (type == 1 || // discover
-        type == 3)   // request
-    {
-        u8 resp[512];
-        u8* out = &resp[0];
-
-        // ethernet
-        memcpy(out, &data[6], 6); out += 6;
-        memcpy(out, kServerMAC, 6); out += 6;
-        *(u16*)out = htons(0x0800); out += 2;
-
-        // IP
-        u8* ipheader = out;
-        *out++ = 0x45;
-        *out++ = 0x00;
-        *(u16*)out = 0; out += 2; // total length
-        *(u16*)out = htons(IPv4ID); out += 2; IPv4ID++;
-        *out++ = 0x00;
-        *out++ = 0x00;
-        *out++ = 0x80; // TTL
-        *out++ = 0x11; // protocol (UDP)
-        *(u16*)out = 0; out += 2; // checksum
-        *(u32*)out = htonl(kServerIP); out += 4; // source IP
-        if (type == 1)
-        {
-            *(u32*)out = htonl(0xFFFFFFFF); out += 4; // destination IP
-        }
-        else if (type == 3)
-        {
-            *(u32*)out = htonl(kClientIP); out += 4; // destination IP
-        }
-
-        // UDP
-        u8* udpheader = out;
-        *(u16*)out = htons(67); out += 2; // source port
-        *(u16*)out = htons(68); out += 2; // destination port
-        *(u16*)out = 0; out += 2; // length
-        *(u16*)out = 0; out += 2; // checksum
-
-        // DHCP
-        u8* body = out;
-        *out++ = 0x02;
-        *out++ = 0x01;
-        *out++ = 0x06;
-        *out++ = 0x00;
-        *(u32*)out = transid; out += 4;
-        *(u16*)out = 0; out += 2; // seconds elapsed
-        *(u16*)out = 0; out += 2;
-        *(u32*)out = htonl(0x00000000); out += 4; // client IP
-        *(u32*)out = htonl(kClientIP); out += 4; // your IP
-        *(u32*)out = htonl(kServerIP); out += 4; // server IP
-        *(u32*)out = htonl(0x00000000); out += 4; // gateway IP
-        memcpy(out, &data[6], 6); out += 6;
-        memset(out, 0, 10); out += 10;
-        memset(out, 0, 192); out += 192;
-        *(u32*)out = 0x63538263; out += 4; // DHCP magic
-
-        // DHCP options
-        *out++ = 53; *out++ = 1;
-        *out++ = (type==1) ? 2 : 5; // DHCP type: offer/ack
-        *out++ = 1; *out++ = 4;
-        *(u32*)out = htonl(0xFFFFFF00); out += 4; // subnet mask
-        *out++ = 3; *out++ = 4;
-        *(u32*)out = htonl(kServerIP); out += 4; // router
-        *out++ = 51; *out++ = 4;
-        *(u32*)out = htonl(442030); out += 4; // lease time
-        *out++ = 54; *out++ = 4;
-        *(u32*)out = htonl(kServerIP); out += 4; // DHCP server
-        *out++ = 6; *out++ = 4;
-        *(u32*)out = htonl(kDNSIP); out += 4; // DNS (hax)
-
-        *out++ = 0xFF;
-        memset(out, 0, 20); out += 20;
-
-        u32 framelen = (u32)(out - &resp[0]);
-        if (framelen & 1) { *out++ = 0; framelen++; }
-        FinishUDPFrame(resp, framelen);
-
-        // TODO: if there is already a packet queued, this will overwrite it
-        // that being said, this will only happen during DHCP setup, so probably
-        // not a big deal
-
-        PacketLen = framelen;
-        memcpy(PacketBuffer, resp, PacketLen);
-        RXNum = 1;
-    }
-}
-
 void HandleDNSFrame(u8* data, int len)
 {
     u8* ipheader = &data[0xE];
@@ -653,540 +409,6 @@ void HandleDNSFrame(u8* data, int len)
     RXNum = 1;
 }
 
-void UDP_BuildIncomingFrame(UDPSocket* sock, u8* data, int len)
-{
-    u8 resp[2048];
-    u8* out = &resp[0];
-
-    if (len > 1536) return;
-
-    // ethernet
-    memcpy(out, Wifi::GetMAC(), 6); out += 6; // hurf
-    memcpy(out, kServerMAC, 6); out += 6;
-    *(u16*)out = htons(0x0800); out += 2;
-
-    // IP
-    u8* resp_ipheader = out;
-    *out++ = 0x45;
-    *out++ = 0x00;
-    *(u16*)out = 0; out += 2; // total length
-    *(u16*)out = htons(IPv4ID); out += 2; IPv4ID++;
-    *out++ = 0x00;
-    *out++ = 0x00;
-    *out++ = 0x80; // TTL
-    *out++ = 0x11; // protocol (UDP)
-    *(u16*)out = 0; out += 2; // checksum
-    memcpy(out, sock->DestIP, 4); out += 4; // source IP
-    *(u32*)out = htonl(kClientIP); out += 4; // destination IP
-
-    // UDP
-    u8* resp_tcpheader = out;
-    *(u16*)out = htons(sock->DestPort); out += 2; // source port
-    *(u16*)out = htons(sock->SourcePort); out += 2; // destination port
-    *(u16*)out = htons(len+8); out += 2; // length of header+data
-    *(u16*)out = 0; out += 2; // checksum
-
-    memcpy(out, data, len); out += len;
-
-    u32 framelen = (u32)(out - &resp[0]);
-    FinishUDPFrame(resp, framelen);
-
-    // TODO: if there is already a packet queued, this will overwrite it
-    // that being said, this will only happen during DHCP setup, so probably
-    // not a big deal
-
-    PacketLen = framelen;
-    memcpy(PacketBuffer, resp, PacketLen);
-    RXNum = 1;
-}
-
-void HandleUDPFrame(u8* data, int len)
-{
-    u8* ipheader = &data[0xE];
-    u8* udpheader = &data[0x22];
-
-    // debug
-    /*for (int j = 0; j < len; j += 16)
-    {
-        int rem = len - j;
-        if (rem > 16) rem = 16;
-        for (int i = 0; i < rem; i++)
-        {
-            printf("%02X ", data[i+j]);
-        }
-        printf("\n");
-    }*/
-
-    u16 srcport = ntohs(*(u16*)&udpheader[0]);
-    u16 dstport = ntohs(*(u16*)&udpheader[2]);
-
-    int sockid = -1;
-    UDPSocket* sock;
-    for (int i = 0; i < (sizeof(UDPSocketList)/sizeof(UDPSocket)); i++)
-    {
-        sock = &UDPSocketList[i];
-        if (sock->Backend != 0 && !memcmp(&sock->DestIP, &ipheader[16], 4) &&
-            sock->SourcePort == srcport && sock->DestPort == dstport)
-        {
-            sockid = i;
-            break;
-        }
-    }
-
-    if (sockid == -1)
-    {
-        sockid = UDPSocketID;
-        sock = &UDPSocketList[sockid];
-
-        UDPSocketID++;
-        if (UDPSocketID >= (sizeof(UDPSocketList)/sizeof(UDPSocket)))
-            UDPSocketID = 0;
-
-        if (sock->Backend != 0)
-        {
-            printf("LANMAGIC: closing previous UDP socket #%d\n", sockid);
-            closesocket(sock->Backend);
-        }
-
-        sock->Backend = socket(AF_INET, SOCK_DGRAM, 0);
-
-        memcpy(sock->DestIP, &ipheader[16], 4);
-        sock->SourcePort = srcport;
-        sock->DestPort = dstport;
-
-        memset(&sock->BackendAddr, 0, sizeof(sock->BackendAddr));
-        sock->BackendAddr.sin_family = AF_INET;
-        sock->BackendAddr.sin_port = htons(dstport);
-        memcpy(&sock->BackendAddr.sin_addr, &ipheader[16], 4);
-        /*if (bind(sock->Backend, (struct sockaddr*)&sock->BackendAddr, sizeof(sock->BackendAddr)) == -1)
-        {
-            printf("bind() shat itself :(\n");
-        }*/
-
-        printf("LANMAGIC: opening UDP socket #%d to %d.%d.%d.%d:%d, srcport %d\n",
-               sockid,
-               ipheader[16], ipheader[17], ipheader[18], ipheader[19],
-               dstport, srcport);
-    }
-
-    u16 udplen = ntohs(*(u16*)&udpheader[4]) - 8;
-
-    printf("UDP: socket %d sending %d bytes\n", sockid, udplen);
-    sendto(sock->Backend, (char*)&udpheader[8], udplen, 0,
-           (struct sockaddr*)&sock->BackendAddr, sizeof(sock->BackendAddr));
-}
-
-void TCP_SYNACK(TCPSocket* sock, u8* data, int len)
-{
-    u8 resp[128];
-    u8* out = &resp[0];
-
-    u8* ipheader = &data[0xE];
-    u8* tcpheader = &data[0x22];
-
-    u32 seqnum = htonl(*(u32*)&tcpheader[4]);
-    seqnum++;
-    sock->AckNum = seqnum;
-
-    //printf("SYNACK  SEQ=%08X|%08X\n", sock->SeqNum, sock->AckNum);
-
-    // ethernet
-    memcpy(out, &data[6], 6); out += 6;
-    memcpy(out, kServerMAC, 6); out += 6;
-    *(u16*)out = htons(0x0800); out += 2;
-
-    // IP
-    u8* resp_ipheader = out;
-    *out++ = 0x45;
-    *out++ = 0x00;
-    *(u16*)out = 0; out += 2; // total length
-    *(u16*)out = htons(IPv4ID); out += 2; IPv4ID++;
-    *out++ = 0x00;
-    *out++ = 0x00;
-    *out++ = 0x80; // TTL
-    *out++ = 0x06; // protocol (TCP)
-    *(u16*)out = 0; out += 2; // checksum
-    *(u32*)out = *(u32*)&ipheader[16]; out += 4; // source IP
-    *(u32*)out = *(u32*)&ipheader[12]; out += 4; // destination IP
-
-    // TCP
-    u8* resp_tcpheader = out;
-    *(u16*)out = *(u16*)&tcpheader[2]; out += 2; // source port
-    *(u16*)out = *(u16*)&tcpheader[0]; out += 2; // destination port
-    *(u32*)out = htonl(sock->SeqNum); out += 4; sock->SeqNum++; // seq number
-    *(u32*)out = htonl(seqnum); out += 4; // ack seq number
-    *(u16*)out = htons(0x8012); out += 2; // flags (SYN+ACK)
-    *(u16*)out = htons(0x7000); out += 2; // window size (uuuh)
-    *(u16*)out = 0; out += 2; // checksum
-    *(u16*)out = 0; out += 2; // urgent pointer
-
-    // TCP options
-    *out++ = 0x02; *out++ = 0x04; // max segment size
-    *(u16*)out = htons(0x05B4); out += 2;
-    *out++ = 0x01;
-    *out++ = 0x01;
-    *out++ = 0x04; *out++ = 0x02; // SACK permitted
-    *out++ = 0x01;
-    *out++ = 0x03; *out++ = 0x03; // window size
-    *out++ = 0x08;
-
-    u32 framelen = (u32)(out - &resp[0]);
-    //if (framelen & 1) { *out++ = 0; framelen++; }
-    FinishTCPFrame(resp, framelen);
-
-    // TODO: if there is already a packet queued, this will overwrite it
-    // that being said, this will only happen during DHCP setup, so probably
-    // not a big deal
-
-    PacketLen = framelen;
-    memcpy(PacketBuffer, resp, PacketLen);
-    RXNum = 1;
-}
-
-void TCP_ACK(TCPSocket* sock, bool fin)
-{
-    u8 resp[64];
-    u8* out = &resp[0];
-
-    u16 flags       = 0x5010;
-    if (fin) flags |= 0x0001;
-
-    //printf("%sACK  SEQ=%08X|%08X\n", fin?"FIN":"   ", sock->SeqNum, sock->AckNum);
-
-    // ethernet
-    memcpy(out, Wifi::GetMAC(), 6); out += 6;
-    memcpy(out, kServerMAC, 6); out += 6;
-    *(u16*)out = htons(0x0800); out += 2;
-
-    // IP
-    u8* resp_ipheader = out;
-    *out++ = 0x45;
-    *out++ = 0x00;
-    *(u16*)out = 0; out += 2; // total length
-    *(u16*)out = htons(IPv4ID); out += 2; IPv4ID++;
-    *out++ = 0x00;
-    *out++ = 0x00;
-    *out++ = 0x80; // TTL
-    *out++ = 0x06; // protocol (TCP)
-    *(u16*)out = 0; out += 2; // checksum
-    *(u32*)out = *(u32*)&sock->DestIP; out += 4; // source IP
-    *(u32*)out = htonl(kClientIP); out += 4; // destination IP
-
-    // TCP
-    u8* resp_tcpheader = out;
-    *(u16*)out = htonl(sock->DestPort); out += 2; // source port
-    *(u16*)out = htonl(sock->SourcePort); out += 2; // destination port
-    *(u32*)out = htonl(sock->SeqNum); out += 4; // seq number
-    *(u32*)out = htonl(sock->AckNum); out += 4; // ack seq number
-    *(u16*)out = htons(flags); out += 2; // flags
-    *(u16*)out = htons(0x7000); out += 2; // window size (uuuh)
-    *(u16*)out = 0; out += 2; // checksum
-    *(u16*)out = 0; out += 2; // urgent pointer
-
-    u32 framelen = (u32)(out - &resp[0]);
-    //if (framelen & 1) { *out++ = 0; framelen++; }
-    FinishTCPFrame(resp, framelen);
-
-    // TODO: if there is already a packet queued, this will overwrite it
-    // that being said, this will only happen during DHCP setup, so probably
-    // not a big deal
-
-    PacketLen = framelen;
-    memcpy(PacketBuffer, resp, PacketLen);
-    RXNum = 1;
-}
-
-void TCP_BuildIncomingFrame(TCPSocket* sock, u8* data, int len)
-{
-    u8 resp[2048];
-    u8* out = &resp[0];
-
-    if (len > 1536) return;
-//printf("INCOMING SEQ=%08X|%08X\n", sock->SeqNum, sock->AckNum);
-    // ethernet
-    memcpy(out, Wifi::GetMAC(), 6); out += 6; // hurf
-    memcpy(out, kServerMAC, 6); out += 6;
-    *(u16*)out = htons(0x0800); out += 2;
-
-    // IP
-    u8* resp_ipheader = out;
-    *out++ = 0x45;
-    *out++ = 0x00;
-    *(u16*)out = 0; out += 2; // total length
-    *(u16*)out = htons(IPv4ID); out += 2; IPv4ID++;
-    *out++ = 0x00;
-    *out++ = 0x00;
-    *out++ = 0x80; // TTL
-    *out++ = 0x06; // protocol (TCP)
-    *(u16*)out = 0; out += 2; // checksum
-    memcpy(out, sock->DestIP, 4); out += 4; // source IP
-    *(u32*)out = htonl(kClientIP); out += 4; // destination IP
-
-    // TCP
-    u8* resp_tcpheader = out;
-    *(u16*)out = htons(sock->DestPort); out += 2; // source port
-    *(u16*)out = htons(sock->SourcePort); out += 2; // destination port
-    *(u32*)out = htonl(sock->SeqNum); out += 4; // seq number
-    *(u32*)out = htonl(sock->AckNum); out += 4; // ack seq number
-    *(u16*)out = htons(0x5018); out += 2; // flags (ACK, PSH)
-    *(u16*)out = htons(0x7000); out += 2; // window size (uuuh)
-    *(u16*)out = 0; out += 2; // checksum
-    *(u16*)out = 0; out += 2; // urgent pointer
-
-    memcpy(out, data, len); out += len;
-
-    u32 framelen = (u32)(out - &resp[0]);
-    FinishTCPFrame(resp, framelen);
-
-    // TODO: if there is already a packet queued, this will overwrite it
-    // that being said, this will only happen during DHCP setup, so probably
-    // not a big deal
-
-    PacketLen = framelen;
-    memcpy(PacketBuffer, resp, PacketLen);
-    RXNum = 1;
-
-    sock->SeqNum += len;
-}
-
-void HandleTCPFrame(u8* data, int len)
-{
-    u8* ipheader = &data[0xE];
-    u8* tcpheader = &data[0x22];
-
-    u16 srcport = ntohs(*(u16*)&tcpheader[0]);
-    u16 dstport = ntohs(*(u16*)&tcpheader[2]);
-    u16 flags = ntohs(*(u16*)&tcpheader[12]);
-
-    u32 tcpheaderlen = 4 * (flags >> 12);
-    u32 tcplen = ntohs(*(u16*)&ipheader[2]) - 0x14;
-    u32 tcpdatalen = tcplen - tcpheaderlen;
-
-    /*printf("tcpflags=%04X header=%d data=%d seq=%08X|%08X\n",
-           flags, tcpheaderlen, tcpdatalen,
-           ntohl(*(u32*)&tcpheader[4]),
-           ntohl(*(u32*)&tcpheader[8]));*/
-
-    if (flags & 0x002) // SYN
-    {
-        int sockid = -1;
-        TCPSocket* sock;
-        for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
-        {
-            sock = &TCPSocketList[i];
-            if (sock->Status != 0 && !memcmp(&sock->DestIP, &ipheader[16], 4) &&
-                sock->SourcePort == srcport && sock->DestPort == dstport)
-            {
-                printf("LANMAGIC: duplicate TCP socket\n");
-                sockid = i;
-                break;
-            }
-        }
-
-        if (sockid == -1)
-        {
-            for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
-            {
-                sock = &TCPSocketList[i];
-                if (sock->Status == 0)
-                {
-                    sockid = i;
-                    break;
-                }
-            }
-        }
-
-        if (sockid == -1)
-        {
-            printf("LANMAGIC: !! TCP SOCKET LIST FULL\n");
-            return;
-        }
-
-        printf("LANMAGIC: opening TCP socket #%d to %d.%d.%d.%d:%d, srcport %d\n",
-               sockid,
-               ipheader[16], ipheader[17], ipheader[18], ipheader[19],
-               dstport, srcport);
-
-        // keep track of it
-        sock->Status = 1;
-        memcpy(sock->DestIP, &ipheader[16], 4);
-        sock->DestPort = dstport;
-        sock->SourcePort = srcport;
-        sock->SeqNum = 0x13370000;
-        sock->AckNum = 0;
-
-        // open backend socket
-        if (!sock->Backend)
-        {
-            sock->Backend = socket(AF_INET, SOCK_STREAM, 0);
-        }
-
-        struct sockaddr_in conn_addr;
-        memset(&conn_addr, 0, sizeof(conn_addr));
-        conn_addr.sin_family = AF_INET;
-        memcpy(&conn_addr.sin_addr, &ipheader[16], 4);
-        conn_addr.sin_port = htons(dstport);
-        if (connect(sock->Backend, (sockaddr*)&conn_addr, sizeof(conn_addr)) == -1)
-        {
-            printf("connect() shat itself :(\n");
-        }
-        else
-        {
-            // acknowledge it
-            TCP_SYNACK(sock, data, len);
-        }
-    }
-    else
-    {
-        int sockid = -1;
-        TCPSocket* sock;
-        for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
-        {
-            sock = &TCPSocketList[i];
-            if (sock->Status != 0 && !memcmp(&sock->DestIP, &ipheader[16], 4) &&
-                sock->SourcePort == srcport && sock->DestPort == dstport)
-            {
-                sockid = i;
-                break;
-            }
-        }
-
-        if (sockid == -1)
-        {
-            printf("LANMAGIC: bad TCP packet\n");
-            return;
-        }
-
-        // TODO: check those
-        u32 seqnum = ntohl(*(u32*)&tcpheader[4]);
-        u32 acknum = ntohl(*(u32*)&tcpheader[8]);
-        sock->SeqNum = acknum;
-        sock->AckNum = seqnum + tcpdatalen;
-
-        // send data over the socket
-        if (tcpdatalen > 0)
-        {
-            u8* tcpdata = &tcpheader[tcpheaderlen];
-
-            printf("TCP: socket %d sending %d bytes (flags=%04X)\n", sockid, tcpdatalen, flags);
-            send(sock->Backend, (char*)tcpdata, tcpdatalen, 0);
-
-            // kind of a hack, there
-            TCP_ACK(sock, false);
-        }
-
-        if (flags & 0x001) // FIN
-        {
-            // TODO: timeout etc
-            printf("TCP: socket %d closing\n", sockid);
-
-            sock->Status = 0;
-            closesocket(sock->Backend);
-            sock->Backend = 0;
-        }
-    }
-}
-
-void HandleARPFrame(u8* data, int len)
-{
-    u16 protocol = ntohs(*(u16*)&data[0x10]);
-    if (protocol != 0x0800) return;
-
-    u16 op = ntohs(*(u16*)&data[0x14]);
-    u32 targetip = ntohl(*(u32*)&data[0x26]);
-
-    // TODO: handle ARP to the client
-    // this only handles ARP to the DHCP/router
-
-    if (op == 1)
-    {
-        // opcode 1=req 2=reply
-        // sender MAC
-        // sender IP
-        // target MAC
-        // target IP
-
-        const u8* targetmac;
-        if (targetip == kServerIP)   targetmac = kServerMAC;
-        else if (targetip == kDNSIP) targetmac = kDNSMAC;
-        else return;
-
-        u8 resp[64];
-        u8* out = &resp[0];
-
-        // ethernet
-        memcpy(out, &data[6], 6); out += 6;
-        memcpy(out, kServerMAC, 6); out += 6;
-        *(u16*)out = htons(0x0806); out += 2;
-
-        // ARP
-        *(u16*)out = htons(0x0001); out += 2; // hardware type
-        *(u16*)out = htons(0x0800); out += 2; // protocol
-        *out++ = 6; // MAC address size
-        *out++ = 4; // IP address size
-        *(u16*)out = htons(0x0002); out += 2; // opcode
-        memcpy(out, targetmac, 6); out += 6;
-        *(u32*)out = htonl(targetip); out += 4;
-        memcpy(out, &data[0x16], 6+4); out += 6+4;
-
-        u32 framelen = (u32)(out - &resp[0]);
-
-        // TODO: if there is already a packet queued, this will overwrite it
-        // that being said, this will only happen during DHCP setup, so probably
-        // not a big deal
-
-        PacketLen = framelen;
-        memcpy(PacketBuffer, resp, PacketLen);
-        RXNum = 1;
-    }
-    else
-    {
-        printf("wat??\n");
-    }
-}
-
-void HandlePacket(u8* data, int len)
-{
-    u16 ethertype = ntohs(*(u16*)&data[0xC]);
-
-    if (ethertype == 0x0800) // IPv4
-    {
-        u8 protocol = data[0x17];
-        if (protocol == 0x11) // UDP
-        {
-            u16 srcport = ntohs(*(u16*)&data[0x22]);
-            u16 dstport = ntohs(*(u16*)&data[0x24]);
-            if (srcport == 68 && dstport == 67) // DHCP
-            {
-                printf("LANMAGIC: DHCP packet\n");
-                return HandleDHCPFrame(data, len);
-            }
-            else if (dstport == 53 && htonl(*(u32*)&data[0x1E]) == kDNSIP) // DNS
-            {
-                printf("LANMAGIC: DNS packet\n");
-                return HandleDNSFrame(data, len);
-            }
-
-            printf("LANMAGIC: UDP packet %d->%d\n", srcport, dstport);
-            return HandleUDPFrame(data, len);
-        }
-        else if (protocol == 0x06) // TCP
-        {
-            printf("LANMAGIC: TCP packet\n");
-            return HandleTCPFrame(data, len);
-        }
-        else
-            printf("LANMAGIC: unsupported IP protocol %02X\n", protocol);
-    }
-    else if (ethertype == 0x0806) // ARP
-    {
-        printf("LANMAGIC: ARP packet\n");
-        return HandleARPFrame(data, len);
-    }
-    else
-        printf("LANMAGIC: unsupported ethernet type %04X\n", ethertype);
-}
-
 int SendPacket(u8* data, int len)
 {
     if (len > 2048)
@@ -1196,52 +418,21 @@ int SendPacket(u8* data, int len)
     }
 
     u16 ethertype = ntohs(*(u16*)&data[0xC]);
-    printf("packet of type %04X\n", ethertype);
 
-    if (ethertype == 0x0806)
-    {
-        u16 protocol = ntohs(*(u16*)&data[0x10]);
-        u16 op = ntohs(*(u16*)&data[0x14]);
-        u32 sourceip = ntohl(*(u32*)&data[0x26-4-6]);
-        u32 targetip = ntohl(*(u32*)&data[0x26]);
-        printf("ARP: protocol=%04X, op=%04X, source=%08X, target=%08X\n", protocol, op, sourceip, targetip);
-    }
-    else if (ethertype == 0x800)
+    if (ethertype == 0x800)
     {
         u8 protocol = data[0x17];
         if (protocol == 0x11) // UDP
         {
-            u16 srcport = ntohs(*(u16*)&data[0x22]);
             u16 dstport = ntohs(*(u16*)&data[0x24]);
-            if (srcport == 68 && dstport == 67) // DHCP
+            if (dstport == 53 && htonl(*(u32*)&data[0x1E]) == kDNSIP) // DNS
             {
-                printf("LANMAGIC: DHCP packet\n");
-            }
-            else if (dstport == 53 && htonl(*(u32*)&data[0x1E]) == kDNSIP) // DNS
-            {
-                printf("LANMAGIC: DNS packet\n");
                 HandleDNSFrame(data, len);
                 return len;
             }
-
-            printf("LANMAGIC: UDP packet %08X->%08X %d->%d\n", htonl(*(u32*)&data[0x1A]), htonl(*(u32*)&data[0x1E]), srcport, dstport);
         }
-        else if (protocol == 0x06) // TCP
-        {
-            printf("LANMAGIC: TCP packet\n");
-
-            for (int i = 0; i < len; i++)
-            {
-                printf("%02X ", data[i]);
-                if ((i&0xF)==0xF) printf("\n");
-            }
-            printf("\n");
-        }
-        else
-            printf("LANMAGIC: unsupported IP protocol %02X\n", protocol);
     }
 
-    //HandlePacket(data, len);
     slirp_input(Ctx, data, len);
     return len;
 }
@@ -1313,13 +504,6 @@ int RecvPacket(u8* data)
         slirp_pollfds_fill(Ctx, &timeout, SlirpCbAddPoll, nullptr);
         int res = poll(FDList, FDListSize, timeout);
         slirp_pollfds_poll(Ctx, res<0, SlirpCbGetREvents, nullptr);
-
-        /*struct pollfd derp = {0};;
-        derp.fd = FDList[0];
-        derp.events = POLLIN | POLLWRNORM;//POLLPRI | POLLIN | POLLWRNORM;
-        int res = poll(&derp, 1, 0);
-        if (res==SOCKET_ERROR) printf("fart: %d / %d\n", WSAGetLastError(), FDList[0]);
-        if(derp.revents) printf("derp: %04X\n", derp.revents);*/
     }
 
     if (RXNum > 0)
@@ -1329,90 +513,6 @@ int RecvPacket(u8* data)
         RXNum = 0;
     }
 
-    /*for (int i = 0; i < (sizeof(TCPSocketList)/sizeof(TCPSocket)); i++)
-    {
-        TCPSocket* sock = &TCPSocketList[i];
-        if (sock->Status != 1) continue;
-
-        fd_set fd;
-        struct timeval tv;
-
-        FD_ZERO(&fd);
-        FD_SET(sock->Backend, &fd);
-        tv.tv_sec = 0;
-        tv.tv_usec = 0;
-
-        if (!select(sock->Backend+1, &fd, 0, 0, &tv))
-        {
-            continue;
-        }
-
-        u8 recvbuf[1024];
-        int recvlen = recv(sock->Backend, (char*)recvbuf, 1024, 0);
-        if (recvlen < 1)
-        {
-            if (recvlen == 0)
-            {
-                // socket has closed from the other side
-                printf("TCP: socket %d closed from other side\n", i);
-                sock->Status = 2;
-                TCP_ACK(sock, true);
-            }
-            continue;
-        }
-
-        printf("TCP: socket %d receiving %d bytes\n", i, recvlen);
-        TCP_BuildIncomingFrame(sock, recvbuf, recvlen);
-
-        // debug
-        /*for (int j = 0; j < recvlen; j += 16)
-        {
-            int rem = recvlen - j;
-            if (rem > 16) rem = 16;
-            for (int k = 0; k < rem; k++)
-            {
-                printf("%02X ", recvbuf[k+j]);
-            }
-            printf("\n");
-        }*-/
-
-        //recvlen = recv(sock->Backend, (char*)recvbuf, 1024, 0);
-        //if (recvlen == 0) printf("it closed immediately after\n");
-    }
-
-    for (int i = 0; i < (sizeof(UDPSocketList)/sizeof(UDPSocket)); i++)
-    {
-        UDPSocket* sock = &UDPSocketList[i];
-        if (sock->Backend == 0) continue;
-
-        fd_set fd;
-        struct timeval tv;
-
-        FD_ZERO(&fd);
-        FD_SET(sock->Backend, &fd);
-        tv.tv_sec = 0;
-        tv.tv_usec = 0;
-
-        if (!select(sock->Backend+1, &fd, 0, 0, &tv))
-        {
-            continue;
-        }
-
-        u8 recvbuf[1024];
-        sockaddr_t fromAddr;
-        socklen_t fromLen = sizeof(sockaddr_t);
-        int recvlen = recvfrom(sock->Backend, (char*)recvbuf, 1024, 0, &fromAddr, &fromLen);
-        if (recvlen < 1) continue;
-
-        if (fromAddr.sa_family != AF_INET) continue;
-        struct sockaddr_in* fromAddrIn = (struct sockaddr_in*)&fromAddr;
-        if (memcmp(&fromAddrIn->sin_addr, sock->DestIP, 4)) continue;
-        if (ntohs(fromAddrIn->sin_port) != sock->DestPort) continue;
-
-        printf("UDP: socket %d receiving %d bytes\n", i, recvlen);
-        UDP_BuildIncomingFrame(sock, recvbuf, recvlen);
-    }*/
-
     return ret;
 }
 

From bbce434815c824f6bdec05b6b4eb980a4e4e8996 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Fri, 5 Jun 2020 20:22:55 +0200
Subject: [PATCH 04/23] pointless fix

---
 src/frontend/qt_sdl/LAN_Socket.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 6a3fa74d..5477a7d3 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -368,12 +368,12 @@ void HandleDNSFrame(u8* data, int len)
             while (p)
             {
                 struct sockaddr_in* addr = (struct sockaddr_in*)p->ai_addr;
-                /*printf(" -> %d.%d.%d.%d",
-                       addr->sin_addr.S_un.S_un_b.s_b1, addr->sin_addr.S_un.S_un_b.s_b2,
-                       addr->sin_addr.S_un.S_un_b.s_b3, addr->sin_addr.S_un.S_un_b.s_b4);*/
-
-                //addr_res = addr->sin_addr.S_un.S_addr;
                 addr_res = *(u32*)&addr->sin_addr;
+
+                printf(" -> %d.%d.%d.%d",
+                       addr_res & 0xFF, (addr_res >> 8) & 0xFF,
+                       (addr_res >> 16) & 0xFF, addr_res >> 24);
+
                 p = p->ai_next;
             }
         }

From 5cd1177e340d9ac81758c3edd951e3d4572a55dc Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Fri, 5 Jun 2020 20:44:18 +0200
Subject: [PATCH 05/23] huh. all DSi files had outdated copyright years

---
 src/DSi.cpp         | 2 +-
 src/DSi.h           | 2 +-
 src/DSi_AES.cpp     | 2 +-
 src/DSi_AES.h       | 2 +-
 src/DSi_Camera.cpp  | 2 +-
 src/DSi_Camera.h    | 2 +-
 src/DSi_I2C.cpp     | 2 +-
 src/DSi_I2C.h       | 2 +-
 src/DSi_NDMA.cpp    | 2 +-
 src/DSi_NDMA.h      | 2 +-
 src/DSi_NWifi.cpp   | 2 +-
 src/DSi_NWifi.h     | 2 +-
 src/DSi_SD.cpp      | 2 +-
 src/DSi_SD.h        | 2 +-
 src/DSi_SPI_TSC.cpp | 2 +-
 src/DSi_SPI_TSC.h   | 2 +-
 16 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/DSi.cpp b/src/DSi.cpp
index 216f724e..17649e43 100644
--- a/src/DSi.cpp
+++ b/src/DSi.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi.h b/src/DSi.h
index 8cc8fd5e..11d31a97 100644
--- a/src/DSi.h
+++ b/src/DSi.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_AES.cpp b/src/DSi_AES.cpp
index 6a8ffad9..c7c599e8 100644
--- a/src/DSi_AES.cpp
+++ b/src/DSi_AES.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_AES.h b/src/DSi_AES.h
index 354c4a7d..77ef464d 100644
--- a/src/DSi_AES.h
+++ b/src/DSi_AES.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_Camera.cpp b/src/DSi_Camera.cpp
index 45061b23..cc44052e 100644
--- a/src/DSi_Camera.cpp
+++ b/src/DSi_Camera.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_Camera.h b/src/DSi_Camera.h
index 78629b54..844a4d28 100644
--- a/src/DSi_Camera.h
+++ b/src/DSi_Camera.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_I2C.cpp b/src/DSi_I2C.cpp
index 9984f5e9..ff755fb8 100644
--- a/src/DSi_I2C.cpp
+++ b/src/DSi_I2C.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_I2C.h b/src/DSi_I2C.h
index d058be14..35f1ad8f 100644
--- a/src/DSi_I2C.h
+++ b/src/DSi_I2C.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_NDMA.cpp b/src/DSi_NDMA.cpp
index 19c72b63..707c777b 100644
--- a/src/DSi_NDMA.cpp
+++ b/src/DSi_NDMA.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_NDMA.h b/src/DSi_NDMA.h
index d7b7483e..57da2896 100644
--- a/src/DSi_NDMA.h
+++ b/src/DSi_NDMA.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index 79bc6321..7bb91aa8 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index e5fe637f..462d7a8d 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_SD.cpp b/src/DSi_SD.cpp
index 7fdba0f3..35227e43 100644
--- a/src/DSi_SD.cpp
+++ b/src/DSi_SD.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_SD.h b/src/DSi_SD.h
index 2862173f..3b8ba56f 100644
--- a/src/DSi_SD.h
+++ b/src/DSi_SD.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_SPI_TSC.cpp b/src/DSi_SPI_TSC.cpp
index 507005b1..adff4a33 100644
--- a/src/DSi_SPI_TSC.cpp
+++ b/src/DSi_SPI_TSC.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 
diff --git a/src/DSi_SPI_TSC.h b/src/DSi_SPI_TSC.h
index f3ffc322..c8e1164b 100644
--- a/src/DSi_SPI_TSC.h
+++ b/src/DSi_SPI_TSC.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2019 Arisotura
+    Copyright 2016-2020 Arisotura
 
     This file is part of melonDS.
 

From fc5eedc7169b38e9131ed125aa3e7db630b87804 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Mon, 15 Jun 2020 13:39:33 +0200
Subject: [PATCH 06/23] * take nwifi forward some * shut up CP15 printf's for
 Fx0 * fix bugs

---
 src/CP15.cpp                 |   8 +-
 src/DSi_NWifi.cpp            | 310 ++++++++++++++++++++++++++++++-----
 src/DSi_NWifi.h              |  13 +-
 src/DSi_SD.cpp               |  52 ++++--
 src/DSi_SD.h                 |   5 +
 src/NDS.cpp                  |   6 +-
 src/RTC.cpp                  |   1 -
 src/Wifi.cpp                 |   3 +-
 src/WifiAP.cpp               |  12 ++
 src/WifiAP.h                 |   1 +
 src/frontend/qt_sdl/main.cpp |   2 +
 11 files changed, 352 insertions(+), 61 deletions(-)

diff --git a/src/CP15.cpp b/src/CP15.cpp
index d340b9e5..2a6489dd 100644
--- a/src/CP15.cpp
+++ b/src/CP15.cpp
@@ -597,7 +597,10 @@ void ARMv5::CP15Write(u32 id, u32 val)
         return;
     }
 
-    if ((id&0xF00)!=0x700)
+    if ((id & 0xF00) == 0xF00) // test/debug shit?
+        return;
+
+    if ((id & 0xF00) != 0x700)
         printf("unknown CP15 write op %03X %08X\n", id, val);
 }
 
@@ -691,6 +694,9 @@ u32 ARMv5::CP15Read(u32 id)
         return ITCMSetting;
     }
 
+    if ((id & 0xF00) == 0xF00) // test/debug shit?
+        return 0;
+
     printf("unknown CP15 read op %03X\n", id);
     return 0;
 }
diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index 7bb91aa8..4843cfb2 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -21,6 +21,7 @@
 #include "DSi.h"
 #include "DSi_NWifi.h"
 #include "SPI.h"
+#include "WifiAP.h"
 
 
 const u8 CIS0[256] =
@@ -111,15 +112,31 @@ const u8 CIS1[256] =
 };
 
 
-// hax
-DSi_NWifi* hax_wifi;
-void triggerirq(u32 param)
-{
-    hax_wifi->SetIRQ_F1_Counter(0);
-}
+DSi_NWifi* Ctx = nullptr;
 
 
 DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
+{
+    // TODO: check the actual mailbox size (presumably 0x200)
+    for (int i = 0; i < 8; i++)
+        Mailbox[i] = new FIFO<u8>(0x200);
+
+    // this seems to control whether the firmware upload is done
+    EEPROMReady = 0;
+
+    Ctx = this;
+}
+
+DSi_NWifi::~DSi_NWifi()
+{
+    for (int i = 0; i < 8; i++)
+        delete Mailbox[i];
+
+    NDS::CancelEvent(NDS::Event_DSi_NWifi);
+    Ctx = nullptr;
+}
+
+void DSi_NWifi::Reset()
 {
     TransferCmd = 0xFFFFFFFF;
     RemSize = 0;
@@ -136,7 +153,7 @@ DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
 
     // TODO: check the actual mailbox size (presumably 0x200)
     for (int i = 0; i < 8; i++)
-        Mailbox[i] = new FIFO<u8>(0x200);
+        Mailbox[i]->Clear();
 
     u8* mac = SPI_Firmware::GetWifiMAC();
     printf("NWifi MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
@@ -158,15 +175,11 @@ DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
 
     *(u16*)&EEPROM[0x004] = chk;
 
-    EEPROMReady = 0;
-
     BootPhase = 0;
-}
 
-DSi_NWifi::~DSi_NWifi()
-{
-    for (int i = 0; i < 8; i++)
-        delete Mailbox[i];
+    ErrorMask = 0;
+
+    NDS::CancelEvent(NDS::Event_DSi_NWifi);
 }
 
 
@@ -671,6 +684,7 @@ void DSi_NWifi::BMI_Command()
 {
     // HLE command handling stub
     u32 cmd = MB_Read32(0);
+    printf("BMI: cmd %08X\n", cmd);
 
     switch (cmd)
     {
@@ -678,8 +692,8 @@ void DSi_NWifi::BMI_Command()
         {
             printf("BMI_DONE\n");
             EEPROMReady = 1; // GROSS FUCKING HACK
-            u8 ready_msg[8] = {0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00};
-            SendWMIFrame(ready_msg, 8, 0, 0x00, 0x0000);
+            u8 ready_msg[6] = {0x0A, 0x00, 0x08, 0x06, 0x16, 0x00};
+            SendWMIEvent(0, 0x0001, ready_msg, 6);
             BootPhase = 1;
         }
         return;
@@ -743,7 +757,7 @@ void DSi_NWifi::BMI_Command()
         {
             u32 len = MB_Read32(0);
             printf("BMI LZ write %08X\n", len);
-            //FILE* f = fopen("wififirm.bin", "ab");
+            //FILE* f = fopen("debug/wififirm.bin", "ab");
 
             for (int i = 0; i < len; i++)
             {
@@ -770,7 +784,6 @@ void DSi_NWifi::WMI_Command()
     u16 h2 = MB_Read16(0);
 
     u16 cmd = MB_Read16(0);
-    printf("WMI: cmd %04X\n", cmd);
 
     switch (cmd)
     {
@@ -778,50 +791,162 @@ void DSi_NWifi::WMI_Command()
         {
             u16 svc_id = MB_Read16(0);
             u16 conn_flags = MB_Read16(0);
+            printf("service connect %04X %04X %04X\n", svc_id, conn_flags, MB_Read16(0));
 
-            u8 svc_resp[10];
-            *(u16*)&svc_resp[0] = 0x0003;
-            *(u16*)&svc_resp[2] = svc_id;
-            svc_resp[4] = 0;
-            svc_resp[5] = (svc_id & 0xFF) + 1;
-            *(u16*)&svc_resp[6] = 0x0001;
-            *(u16*)&svc_resp[8] = 0x0001;
-            SendWMIFrame(svc_resp, 10, 0, 0x00, 0x0000);
+            u8 svc_resp[8];
+            // responses from hardware:
+            // 0003 0100 00 01 0602 00 00
+            // 0003 0101 00 02 0600 00 00
+            // 0003 0102 00 03 0600 00 00
+            // 0003 0103 00 04 0600 00 00
+            // 0003 0104 00 05 0600 00 00
+            *(u16*)&svc_resp[0] = svc_id;
+            svc_resp[2] = 0;
+            svc_resp[3] = (svc_id & 0xFF) + 1;
+            *(u16*)&svc_resp[4] = (svc_id==0x0100) ? 0x0602 : 0x0600; // max message size
+            *(u16*)&svc_resp[6] = 0x0000;
+            SendWMIEvent(0, 0x0003, svc_resp, 8);
         }
         break;
 
     case 0x0004: // setup complete
         {
-            u8 ready_evt[14];
-            memset(ready_evt, 0, 14);
-            *(u16*)&ready_evt[0] = 0x1001;
-            memcpy(&ready_evt[2], SPI_Firmware::GetWifiMAC(), 6);
-            ready_evt[8] = 0x02;
-            *(u32*)&ready_evt[10] = 0x23000024;
-            // ctrl[0] = trailer size
-            // trailer[1] = trailer extra size
-            // trailer[0] = trailer type???
-            SendWMIFrame(ready_evt, 14, 1, 0x00, 0x0000);
+            u8 ready_evt[12];
+            memcpy(&ready_evt[0], SPI_Firmware::GetWifiMAC(), 6);
+            ready_evt[6] = 0x02;
+            ready_evt[7] = 0;
+            *(u32*)&ready_evt[8] = 0x2300006C;
+            SendWMIEvent(1, 0x1001, ready_evt, 12);
+
+            u8 regdomain_evt[4];
+            *(u32*)&regdomain_evt[0] = 0x80000000 | (*(u16*)&EEPROM[0x008] & 0x0FFF);
+            SendWMIEvent(1, 0x1006, regdomain_evt, 4);
+
+            NDS::ScheduleEvent(NDS::Event_DSi_NWifi, true, 33611, MSTimer, 0);
+        }
+        break;
+
+    case 0x0008: // set scan params
+        {
+            // TODO: do something with the params!!
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0009: // set BSS filter
+        {
+            // TODO: do something with the params!!
+            u8 bssfilter = Mailbox[0]->Read();
+            Mailbox[0]->Read();
+            Mailbox[0]->Read();
+            Mailbox[0]->Read();
+            u32 iemask = MB_Read32(0);
+
+            printf("WMI: set BSS filter, filter=%02X, iemask=%08X\n", bssfilter, iemask);
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x000A: // set probed BSSID
+        {
+            u8 id = Mailbox[0]->Read();
+            u8 flags = Mailbox[0]->Read();
+            u8 len = Mailbox[0]->Read();
+
+            char ssid[33];
+            for (int i = 0; i < len && i < 32; i++)
+                ssid[i] = Mailbox[0]->Read();
+            ssid[32]= '\0';
+
+            // TODO: store it somewhere
+            printf("WMI: set probed SSID: id=%d, flags=%02X, len=%d, SSID=%s\n", id, flags, len, ssid);
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x000E: // get channel list
+        {
+            int nchan = 11; // TODO: customize??
+            u8 reply[2 + (nchan*2) + 2];
+
+            reply[0] = 0;
+            reply[1] = nchan;
+            for (int i = 0; i < nchan; i++)
+                *(u16*)&reply[2 + (i*2)] = 2412 + (i*5);
+            *(u16*)&reply[2 + (nchan*2)] = 0;
+
+            SendWMIEvent(1, 0x000E, reply, 4+(nchan*2));
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0011: // set channel params
+        {
+            Mailbox[0]->Read();
+            u8 scan = Mailbox[0]->Read();
+            u8 phymode = Mailbox[0]->Read();
+            u8 len = Mailbox[0]->Read();
+
+            u16 channels[32];
+            for (int i = 0; i < len && i < 32; i++)
+                channels[i] = MB_Read16(0);
+
+            // TODO: store it somewhere
+            printf("WMI: set channel params: scan=%d, phymode=%d, len=%d, channels=", scan, phymode, len);
+            for (int i = 0; i < len && i < 32; i++)
+                printf("%d,", channels[i]);
+            printf("\n");
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0022: // set error bitmask
+        {
+            ErrorMask = MB_Read32(0);
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0047: // cmd47 -- timer shenanigans??
+        {
+            //
+
+            SendWMIAck();
         }
         break;
 
     default:
         printf("unknown WMI command %04X\n", cmd);
+        for (int i = 0; i < len; i++)
+        {
+            printf("%02X ", Mailbox[0]->Read());
+            if ((i&0xF)==0xF) printf("\n");
+        }
+        printf("\n");
         break;
     }
 
     MB_Drain(0);
 }
 
-void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
+//void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
+void DSi_NWifi::SendWMIEvent(u8 ep, u16 id, u8* data, u32 len)
 {
     u32 wlen = 0;
 
-    Mailbox[4]->Write(ep); // eid
-    Mailbox[4]->Write(flags); // flags
-    MB_Write16(4, len); // payload length
-    MB_Write16(4, ctrl); // ctrl
-    wlen += 6;
+    Mailbox[4]->Write(ep);    // eid
+    Mailbox[4]->Write(0x02);  // flags (trailer)
+    MB_Write16(4, len+2+8);   // data length (plus event ID and trailer)
+    Mailbox[4]->Write(8);     // trailer length
+    Mailbox[4]->Write(0);     //
+    MB_Write16(4, id);        // event ID
+    wlen += 8;
 
     for (int i = 0; i < len; i++)
     {
@@ -829,6 +954,53 @@ void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
         wlen++;
     }
 
+    // trailer
+    Mailbox[4]->Write(0x02);
+    Mailbox[4]->Write(0x06);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    wlen += 8;
+
+    for (; wlen & 0x7F; wlen++)
+        Mailbox[4]->Write(0);
+}
+
+void DSi_NWifi::SendWMIAck()
+{
+    u32 wlen = 0;
+
+    Mailbox[4]->Write(0);     // eid
+    Mailbox[4]->Write(0x02);  // flags (trailer)
+    MB_Write16(4, 0xC);       // data length (plus event ID and trailer)
+    Mailbox[4]->Write(0xC);   // trailer length
+    Mailbox[4]->Write(0);     //
+    wlen += 6;
+
+    // trailer
+    Mailbox[4]->Write(0x01);
+    Mailbox[4]->Write(0x02);
+    Mailbox[4]->Write(0x01);
+    Mailbox[4]->Write(0x01);
+    Mailbox[4]->Write(0x02);
+    Mailbox[4]->Write(0x06);
+
+    // observed trailer data:
+    // 00 06 00 00 02 00 (in the first few responses)
+    // 00 00 00 00 00 00
+    // TODO: work out what that all means?
+    // does software even care?
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x06);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x00);
+    Mailbox[4]->Write(0x02);
+    Mailbox[4]->Write(0x00);
+    wlen += 0xC;
+
     for (; wlen & 0x7F; wlen++)
         Mailbox[4]->Write(0);
 }
@@ -849,7 +1021,7 @@ u32 DSi_NWifi::WindowRead(u32 addr)
             // base address of EEPROM data
             // TODO find what the actual address is!
             return 0x1FFC00;
-        case 0x58: return EEPROMReady; // hax
+        case 0x58: return EEPROMReady;
         }
 
         return 0;
@@ -879,3 +1051,55 @@ void DSi_NWifi::WindowWrite(u32 addr, u32 val)
 {
     printf("NWifi: window write %08X %08X\n", addr, val);
 }
+
+
+void DSi_NWifi::CheckRX()
+{return;
+    u16 framelen;
+    u16 framectl;
+
+    for (;;)
+    {
+        int rxlen = WifiAP::RecvPacket(RXBuffer);
+        if (rxlen == 0) return;
+        if (rxlen < 12+24) continue;
+
+        framelen = *(u16*)&RXBuffer[10];
+        if (framelen != rxlen-12)
+        {
+            printf("bad frame length\n");
+            continue;
+        }
+        framelen -= 4;
+
+        framectl = *(u16*)&RXBuffer[12+0];
+        if ((framectl & 0x00FC) == 0x0080) // beacon
+        {
+            printf("NWifi: got beacon\n");
+
+            u32 bodylen = framelen - 24;
+            if (bodylen > 256-16) bodylen = 256-16;
+
+            u8 beacon_evt[256];
+            memset(beacon_evt, 0, 256);
+            *(u16*)&beacon_evt[0] = 0x1004; // WMI_BSSINFO_EVENT
+            *(u16*)&beacon_evt[2] = 2442; // channel (in MHz???? welp)
+            beacon_evt[2] = 0x01; // frame type
+            beacon_evt[3] = 0x33; // 'snr' (???????)
+            *(u16*)&beacon_evt[4] = 0xFFD4; // 'rssi', 'snr'-95 (?????)
+            memcpy(&beacon_evt[6], &RXBuffer[12+16], 6); // BSSID
+            *(u32*)&beacon_evt[12] = 0; // ieMask (???????)
+            memcpy(&beacon_evt[16], &RXBuffer[12+24], bodylen); // frame body
+            //SendWMIFrame(beacon_evt, 16+bodylen, 1, 0, 0);
+        }
+    }
+}
+
+void DSi_NWifi::MSTimer(u32 param)
+{
+    WifiAP::MSTimer();
+
+    Ctx->CheckRX();
+
+    NDS::ScheduleEvent(NDS::Event_DSi_NWifi, true, 33611, MSTimer, 0);
+}
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index 462d7a8d..8693b189 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -28,6 +28,8 @@ public:
     DSi_NWifi(DSi_SDHost* host);
     ~DSi_NWifi();
 
+    void Reset();
+
     void SendCMD(u8 cmd, u32 param);
     void SendACMD(u8 cmd, u32 param);
 
@@ -35,6 +37,10 @@ public:
 
     void SetIRQ_F1_Counter(u32 n);
 
+    void CheckRX();
+
+    static void MSTimer(u32 param);
+
 private:
     u32 TransferCmd;
     u32 TransferAddr;
@@ -62,7 +68,8 @@ private:
     void BMI_Command();
     void WMI_Command();
 
-    void SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl);
+    void SendWMIEvent(u8 ep, u16 id, u8* data, u32 len);
+    void SendWMIAck();
 
     u32 WindowRead(u32 addr);
     void WindowWrite(u32 addr, u32 val);
@@ -116,6 +123,10 @@ private:
     u32 EEPROMReady;
 
     u32 BootPhase;
+
+    u32 ErrorMask;
+
+    u8 RXBuffer[2048];
 };
 
 #endif // DSI_NWIFI_H
diff --git a/src/DSi_SD.cpp b/src/DSi_SD.cpp
index 35227e43..def7a337 100644
--- a/src/DSi_SD.cpp
+++ b/src/DSi_SD.cpp
@@ -112,8 +112,8 @@ void DSi_SDHost::Reset()
 
     if (Ports[0]) delete Ports[0];
     if (Ports[1]) delete Ports[1];
-    Ports[0] = NULL;
-    Ports[1] = NULL;
+    Ports[0] = nullptr;
+    Ports[1] = nullptr;
 
     if (Num == 0)
     {
@@ -135,6 +135,9 @@ void DSi_SDHost::Reset()
 
         Ports[0] = nwifi;
     }
+
+    if (Ports[0]) Ports[0]->Reset();
+    if (Ports[1]) Ports[1]->Reset();
 }
 
 void DSi_SDHost::DoSavestate(Savestate* file)
@@ -205,6 +208,18 @@ void DSi_SDHost::SetCardIRQ()
     }
 }
 
+void DSi_SDHost::UpdateCardIRQ(u16 oldmask)
+{
+    u16 oldflags = CardIRQStatus & ~oldmask;
+    u16 newflags = CardIRQStatus & ~CardIRQMask;
+
+    if ((oldflags == 0) && (newflags != 0)) // checkme
+    {
+        NDS::SetIRQ2(Num ? NDS::IRQ2_DSi_SDIO : NDS::IRQ2_DSi_SDMMC);
+        NDS::SetIRQ2(Num ? NDS::IRQ2_DSi_SDIO_Data1 : NDS::IRQ2_DSi_SD_Data1);
+    }
+}
+
 void DSi_SDHost::SendResponse(u32 val, bool last)
 {
     *(u32*)&ResponseBuffer[6] = *(u32*)&ResponseBuffer[4];
@@ -448,6 +463,7 @@ u16 DSi_SDHost::Read(u32 addr)
     case 0x0F6: return 0; // MMC write protect (always 0)
 
     case 0x100: return Data32IRQ;
+    case 0x102: return 0;
     case 0x104: return BlockLen32;
     case 0x108: return BlockCount32;
     }
@@ -549,8 +565,8 @@ void DSi_SDHost::Write(u32 addr, u16 val)
             u32 oldmask = IRQMask;
             IRQMask = (IRQMask & 0x0000031D) | ((val & 0x8B7F) << 16);
             UpdateIRQ(oldmask);
-            if (!DataFIFO[CurFIFO]->IsEmpty()) SetIRQ(24); // checkme
-            if (DataFIFO[CurFIFO]->IsEmpty()) SetIRQ(25); // checkme
+            //if (!DataFIFO[CurFIFO]->IsEmpty()) SetIRQ(24); // checkme
+            //if (DataFIFO[CurFIFO]->IsEmpty()) SetIRQ(25); // checkme
         }
         return;
 
@@ -571,8 +587,13 @@ void DSi_SDHost::Write(u32 addr, u16 val)
         CardIRQStatus &= val;
         return;
     case 0x038:
-        CardIRQMask = val & 0xC007;
-        SetCardIRQ();
+        {
+            u16 oldmask = CardIRQMask;
+            CardIRQMask = val & 0xC007;
+            UpdateCardIRQ(oldmask);
+        }
+        //CardIRQMask = val & 0xC007;
+        //SetCardIRQ();
         return;
 
     case 0x0D8:
@@ -592,6 +613,9 @@ void DSi_SDHost::Write(u32 addr, u16 val)
             SDOption = 0x40EE;
             // TODO: CARD_IRQ_STAT
             // TODO: FIFO16 shit
+
+            if (Ports[0]) Ports[0]->Reset();
+            if (Ports[1]) Ports[1]->Reset();
         }
         SoftReset = 0x0006 | (val & 0x0001);
         return;
@@ -601,6 +625,7 @@ void DSi_SDHost::Write(u32 addr, u16 val)
         if (val & (1<<10)) DataFIFO32->Clear();
         DataMode = ((DataCtl >> 1) & 0x1) & ((Data32IRQ >> 1) & 0x1);
         return;
+    case 0x102: return;
     case 0x104: BlockLen32 = val & 0x03FF; return;
     case 0x108: BlockCount32 = val; return;
     }
@@ -701,6 +726,16 @@ DSi_MMCStorage::DSi_MMCStorage(DSi_SDHost* host, bool internal, const char* path
             File = Platform::OpenLocalFile(path, "w+b");
         }
     }
+}
+
+DSi_MMCStorage::~DSi_MMCStorage()
+{
+    if (File) fclose(File);
+}
+
+void DSi_MMCStorage::Reset()
+{
+    // TODO: reset file access????
 
     CSR = 0x00000100; // checkme
 
@@ -723,11 +758,6 @@ DSi_MMCStorage::DSi_MMCStorage(DSi_SDHost* host, bool internal, const char* path
     RWCommand = 0;
 }
 
-DSi_MMCStorage::~DSi_MMCStorage()
-{
-    if (File) fclose(File);
-}
-
 void DSi_MMCStorage::SendCMD(u8 cmd, u32 param)
 {
     if (CSR & (1<<5))
diff --git a/src/DSi_SD.h b/src/DSi_SD.h
index 3b8ba56f..30da6c71 100644
--- a/src/DSi_SD.h
+++ b/src/DSi_SD.h
@@ -95,6 +95,7 @@ private:
     void ClearIRQ(u32 irq);
     void SetIRQ(u32 irq);
     void UpdateIRQ(u32 oldmask);
+    void UpdateCardIRQ(u16 oldmask);
 };
 
 
@@ -104,6 +105,8 @@ public:
     DSi_SDDevice(DSi_SDHost* host) { Host = host; IRQ = false; }
     ~DSi_SDDevice() {}
 
+    virtual void Reset() = 0;
+
     virtual void SendCMD(u8 cmd, u32 param) = 0;
     virtual void ContinueTransfer() = 0;
 
@@ -120,6 +123,8 @@ public:
     DSi_MMCStorage(DSi_SDHost* host, bool internal, const char* path);
     ~DSi_MMCStorage();
 
+    void Reset();
+
     void SetCID(u8* cid) { memcpy(CID, cid, 16); }
 
     void SendCMD(u8 cmd, u32 param);
diff --git a/src/NDS.cpp b/src/NDS.cpp
index 22368aef..34a9da94 100644
--- a/src/NDS.cpp
+++ b/src/NDS.cpp
@@ -1756,14 +1756,14 @@ void debug(u32 param)
     }
     fclose(shit);*/
     FILE*
-    /*shit = fopen("debug/dump9.bin", "wb");
+    shit = fopen("debug/dump9.bin", "wb");
     for (u32 i = 0x02000000; i < 0x04000000; i+=4)
     {
         u32 val = DSi::ARM9Read32(i);
         fwrite(&val, 4, 1, shit);
     }
-    fclose(shit);*/
-    shit = fopen("debug/dump7_2.bin", "wb");
+    fclose(shit);
+    shit = fopen("debug/dump7.bin", "wb");
     for (u32 i = 0x02000000; i < 0x04000000; i+=4)
     {
         u32 val = DSi::ARM7Read32(i);
diff --git a/src/RTC.cpp b/src/RTC.cpp
index 0d80b2ca..fed63d50 100644
--- a/src/RTC.cpp
+++ b/src/RTC.cpp
@@ -106,7 +106,6 @@ u8 BCD(u8 val)
 
 void ByteIn(u8 val)
 {
-    //printf("RTC IN: %02X\n", val);
     if (InputPos == 0)
     {
         if ((val & 0xF0) == 0x60)
diff --git a/src/Wifi.cpp b/src/Wifi.cpp
index ab827244..54fbceb2 100644
--- a/src/Wifi.cpp
+++ b/src/Wifi.cpp
@@ -966,7 +966,8 @@ void MSTimer()
 
 void USTimer(u32 param)
 {
-    WifiAP::USTimer();
+    // FIXME!!!
+    //WifiAP::USTimer();
 
     if (IOPORT(W_USCountCnt))
     {
diff --git a/src/WifiAP.cpp b/src/WifiAP.cpp
index 3a5de370..122e9d3a 100644
--- a/src/WifiAP.cpp
+++ b/src/WifiAP.cpp
@@ -130,6 +130,18 @@ void USTimer()
     }
 }
 
+void MSTimer()
+{
+    USCounter += 0x400;
+
+    u32 chk = (u32)USCounter;
+    if (!(chk & 0x1FC00))
+    {
+        // send beacon every 128ms
+        BeaconDue = true;
+    }
+}
+
 
 int HandleManagementFrame(u8* data, int len)
 {
diff --git a/src/WifiAP.h b/src/WifiAP.h
index 97946a50..a2922bde 100644
--- a/src/WifiAP.h
+++ b/src/WifiAP.h
@@ -27,6 +27,7 @@ void DeInit();
 void Reset();
 
 void USTimer();
+void MSTimer();
 
 // packet format: 12-byte TX header + original 802.11 frame
 int SendPacket(u8* data, int len);
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index f1b31b30..189581bf 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -1285,6 +1285,8 @@ void MainWindow::keyPressEvent(QKeyEvent* event)
 {
     if (event->isAutoRepeat()) return;
 
+    if (event->key() == Qt::Key_F11) NDS::debug(0);
+
     Input::KeyPress(event);
 }
 

From 3fde8411a7484cd88877deaee38328eb573f5513 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Mon, 15 Jun 2020 13:40:54 +0200
Subject: [PATCH 07/23] fix ass-stupid RTC bug

---
 src/RTC.cpp | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/RTC.cpp b/src/RTC.cpp
index fed63d50..ba51dff6 100644
--- a/src/RTC.cpp
+++ b/src/RTC.cpp
@@ -174,7 +174,6 @@ void ByteIn(u8 val)
             case 0x70: Output[0] = FreeReg; break;
             }
         }
-        InputPos++;
         return;
     }
 
@@ -220,8 +219,6 @@ void ByteIn(u8 val)
         if (InputPos == 1) FreeReg = val;
         break;
     }
-
-    InputPos++;
 }
 
 

From c6dc5dfc4b55f56abd8ee0d146728cccf1c45388 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Mon, 15 Jun 2020 14:35:02 +0200
Subject: [PATCH 08/23] get it to atleast finish a scan without shitting itself

---
 src/DSi_NWifi.cpp | 77 ++++++++++++++++++++++++++++++++++++++++-------
 src/DSi_NWifi.h   |  3 +-
 src/Wifi.cpp      |  3 +-
 3 files changed, 69 insertions(+), 14 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index 4843cfb2..a0778bbf 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -21,7 +21,6 @@
 #include "DSi.h"
 #include "DSi_NWifi.h"
 #include "SPI.h"
-#include "WifiAP.h"
 
 
 const u8 CIS0[256] =
@@ -178,6 +177,7 @@ void DSi_NWifi::Reset()
     BootPhase = 0;
 
     ErrorMask = 0;
+    ScanTimer = 0;
 
     NDS::CancelEvent(NDS::Event_DSi_NWifi);
 }
@@ -826,6 +826,29 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x0007: // start scan
+        {
+            u32 forcefg = MB_Read32(0);
+            u32 legacy = MB_Read32(0);
+            u32 scantime = MB_Read32(0);
+            u32 forceinterval = MB_Read32(0);
+            u8 scantype = Mailbox[0]->Read();
+            u8 nchannels = Mailbox[0]->Read();
+
+            printf("WMI: start scan, forceFG=%d, legacy=%d, scanTime=%d, interval=%d, scanType=%d, chan=%d\n",
+                   forcefg, legacy, scantime, forceinterval, scantype, nchannels);
+
+            if (ScanTimer > 0)
+            {
+                printf("!! CHECKME: START SCAN BUT WAS ALREADY SCANNING (%d)\n", ScanTimer);
+            }
+
+            ScanTimer = scantime;
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x0008: // set scan params
         {
             // TODO: do something with the params!!
@@ -913,6 +936,33 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x002E: // extension shit
+        {
+            u16 extcmd = MB_Read16(0);
+            switch (extcmd)
+            {
+            case 0x2008: // 'heartbeat'??
+                {
+                    u32 cookie = MB_Read32(0);
+                    u32 source = MB_Read32(0);
+
+                    u8 reply[10];
+                    *(u16*)&reply[0] = 0x3007;
+                    *(u32*)&reply[2] = cookie;
+                    *(u32*)&reply[6] = source;
+                    SendWMIEvent(1, 0x1010, reply, 10);
+                }
+                break;
+
+            default:
+                printf("WMI: unknown ext cmd 002E:%04X\n", extcmd);
+                break;
+            }
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x0047: // cmd47 -- timer shenanigans??
         {
             //
@@ -1053,12 +1103,20 @@ void DSi_NWifi::WindowWrite(u32 addr, u32 val)
 }
 
 
-void DSi_NWifi::CheckRX()
-{return;
-    u16 framelen;
-    u16 framectl;
+void DSi_NWifi::_MSTimer()
+{
+    if (ScanTimer > 0)
+    {
+        ScanTimer--;
 
-    for (;;)
+        if (ScanTimer == 0)
+        {
+            u32 status = 0;
+            SendWMIEvent(1, 0x100A, (u8*)&status, 4);
+        }
+    }
+
+    /*for (;;)
     {
         int rxlen = WifiAP::RecvPacket(RXBuffer);
         if (rxlen == 0) return;
@@ -1092,14 +1150,11 @@ void DSi_NWifi::CheckRX()
             memcpy(&beacon_evt[16], &RXBuffer[12+24], bodylen); // frame body
             //SendWMIFrame(beacon_evt, 16+bodylen, 1, 0, 0);
         }
-    }
+    }*/
 }
 
 void DSi_NWifi::MSTimer(u32 param)
 {
-    WifiAP::MSTimer();
-
-    Ctx->CheckRX();
-
+    Ctx->_MSTimer();
     NDS::ScheduleEvent(NDS::Event_DSi_NWifi, true, 33611, MSTimer, 0);
 }
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index 8693b189..68c37957 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -37,7 +37,7 @@ public:
 
     void SetIRQ_F1_Counter(u32 n);
 
-    void CheckRX();
+    void _MSTimer();
 
     static void MSTimer(u32 param);
 
@@ -125,6 +125,7 @@ private:
     u32 BootPhase;
 
     u32 ErrorMask;
+    u32 ScanTimer;
 
     u8 RXBuffer[2048];
 };
diff --git a/src/Wifi.cpp b/src/Wifi.cpp
index 54fbceb2..ab827244 100644
--- a/src/Wifi.cpp
+++ b/src/Wifi.cpp
@@ -966,8 +966,7 @@ void MSTimer()
 
 void USTimer(u32 param)
 {
-    // FIXME!!!
-    //WifiAP::USTimer();
+    WifiAP::USTimer();
 
     if (IOPORT(W_USCountCnt))
     {

From afbdd96a907e85849d67e14bf6c9217e20f666ea Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Mon, 15 Jun 2020 16:06:00 +0200
Subject: [PATCH 09/23] make it actually connect. hark hark hark

---
 src/DSi_NWifi.cpp | 282 +++++++++++++++++++++++++++++++++++++++-------
 src/DSi_NWifi.h   |   7 ++
 src/WifiAP.cpp    |   3 -
 src/WifiAP.h      |   5 +
 4 files changed, 252 insertions(+), 45 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index a0778bbf..af93ccee 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -21,6 +21,7 @@
 #include "DSi.h"
 #include "DSi_NWifi.h"
 #include "SPI.h"
+#include "WifiAP.h"
 
 
 const u8 CIS0[256] =
@@ -179,6 +180,9 @@ void DSi_NWifi::Reset()
     ErrorMask = 0;
     ScanTimer = 0;
 
+    BeaconTimer = 0x10A2220ULL;
+    ConnectionStatus = 0;
+
     NDS::CancelEvent(NDS::Event_DSi_NWifi);
 }
 
@@ -676,7 +680,8 @@ void DSi_NWifi::HandleCommand()
     switch (BootPhase)
     {
     case 0: return BMI_Command();
-    case 1: return WMI_Command();
+    case 1: return HTC_Command();
+    case 2: return WMI_Command();
     }
 }
 
@@ -684,7 +689,6 @@ void DSi_NWifi::BMI_Command()
 {
     // HLE command handling stub
     u32 cmd = MB_Read32(0);
-    printf("BMI: cmd %08X\n", cmd);
 
     switch (cmd)
     {
@@ -776,7 +780,7 @@ void DSi_NWifi::BMI_Command()
     }
 }
 
-void DSi_NWifi::WMI_Command()
+void DSi_NWifi::HTC_Command()
 {
     // HLE command handling stub
     u16 h0 = MB_Read16(0);
@@ -822,10 +826,61 @@ void DSi_NWifi::WMI_Command()
             *(u32*)&regdomain_evt[0] = 0x80000000 | (*(u16*)&EEPROM[0x008] & 0x0FFF);
             SendWMIEvent(1, 0x1006, regdomain_evt, 4);
 
+            BootPhase = 2;
             NDS::ScheduleEvent(NDS::Event_DSi_NWifi, true, 33611, MSTimer, 0);
         }
         break;
 
+    default:
+        printf("unknown HTC command %04X\n", cmd);
+        for (int i = 0; i < len; i++)
+        {
+            printf("%02X ", Mailbox[0]->Read());
+            if ((i&0xF)==0xF) printf("\n");
+        }
+        printf("\n");
+        break;
+    }
+
+    MB_Drain(0);
+}
+
+void DSi_NWifi::WMI_Command()
+{
+    // HLE command handling stub
+    u16 h0 = MB_Read16(0);
+    u16 len = MB_Read16(0);
+    u16 h2 = MB_Read16(0);
+
+    u16 cmd = MB_Read16(0);
+
+    switch (cmd)
+    {
+    case 0x0001: // connect to network
+        {
+            WMI_ConnectToNetwork();
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0004: // synchronize
+        {
+            Mailbox[0]->Read();
+            // TODO??
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0005: // create priority stream
+        {
+            // TODO???
+            // there's a lot of crap in there.
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x0007: // start scan
         {
             u32 forcefg = MB_Read32(0);
@@ -843,7 +898,8 @@ void DSi_NWifi::WMI_Command()
                 printf("!! CHECKME: START SCAN BUT WAS ALREADY SCANNING (%d)\n", ScanTimer);
             }
 
-            ScanTimer = scantime;
+            // checkme
+            ScanTimer = scantime*5;
 
             SendWMIAck();
         }
@@ -878,10 +934,9 @@ void DSi_NWifi::WMI_Command()
             u8 flags = Mailbox[0]->Read();
             u8 len = Mailbox[0]->Read();
 
-            char ssid[33];
+            char ssid[33] = {0};
             for (int i = 0; i < len && i < 32; i++)
                 ssid[i] = Mailbox[0]->Read();
-            ssid[32]= '\0';
 
             // TODO: store it somewhere
             printf("WMI: set probed SSID: id=%d, flags=%02X, len=%d, SSID=%s\n", id, flags, len, ssid);
@@ -890,6 +945,15 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x000D: // set disconnect timeout
+        {
+            Mailbox[0]->Read();
+            // TODO??
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x000E: // get channel list
         {
             int nchan = 11; // TODO: customize??
@@ -928,6 +992,20 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x0012: // set power mode
+        {
+            Mailbox[0]->Read();
+            // TODO??
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0017: // dummy?
+        Mailbox[0]->Read();
+        SendWMIAck();
+        break;
+
     case 0x0022: // set error bitmask
         {
             ErrorMask = MB_Read32(0);
@@ -963,6 +1041,24 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x003D: // set keepalive interval
+        {
+            Mailbox[0]->Read();
+            // TODO??
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0x0041: // 'WMI_SET_WSC_STATUS_CMD'
+        {
+            Mailbox[0]->Read();
+            // TODO??
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x0047: // cmd47 -- timer shenanigans??
         {
             //
@@ -971,6 +1067,28 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x0048: // not supported by DSi??
+        {
+            MB_Read32(0);
+            MB_Read32(0);
+            Mailbox[0]->Read();
+            Mailbox[0]->Read();
+
+            SendWMIAck();
+        }
+        break;
+
+    case 0xF000: // set bitrate
+        {
+            // TODO!
+            Mailbox[0]->Read();
+            Mailbox[0]->Read();
+            Mailbox[0]->Read();
+
+            SendWMIAck();
+        }
+        break;
+
     default:
         printf("unknown WMI command %04X\n", cmd);
         for (int i = 0; i < len; i++)
@@ -985,6 +1103,64 @@ void DSi_NWifi::WMI_Command()
     MB_Drain(0);
 }
 
+void DSi_NWifi::WMI_ConnectToNetwork()
+{
+    u8 type = Mailbox[0]->Read();
+    u8 auth11 = Mailbox[0]->Read();
+    u8 auth = Mailbox[0]->Read();
+    u8 pCryptoType = Mailbox[0]->Read();
+    u8 pCryptoLen = Mailbox[0]->Read();
+    u8 gCryptoType = Mailbox[0]->Read();
+    u8 gCryptoLen = Mailbox[0]->Read();
+    u8 ssidLen = Mailbox[0]->Read();
+
+    char ssid[33] = {0};
+    for (int i = 0; i < 32; i++)
+        ssid[i] = Mailbox[0]->Read();
+    if (ssidLen <= 32)
+        ssid[ssidLen] = '\0';
+
+    u16 channel = MB_Read16(0);
+
+    u8 bssid[6];
+    *(u32*)&bssid[0] = MB_Read32(0);
+    *(u16*)&bssid[4] = MB_Read16(0);
+
+    u32 flags = MB_Read32(0);
+
+    if ((type != 0x01) ||
+        (auth11 != 0x01) ||
+        (auth != 0x01) ||
+        (pCryptoType != 0x01) ||
+        (gCryptoType != 0x01) ||
+        (memcmp(bssid, WifiAP::APMac, 6)))
+    {
+        printf("WMI_Connect: bad parameters\n");
+        // TODO: send disconnect??
+        return;
+    }
+
+    printf("WMI: connecting to network %s\n", ssid);
+
+    u8 reply[20];
+
+    // hope this is right!
+    *(u16*)&reply[0] = 2437; // channel
+    memcpy(&reply[2], WifiAP::APMac, 6); // BSSID
+    *(u16*)&reply[8] = 128; // listen interval
+    *(u16*)&reply[10] = 128; // beacon interval
+    *(u32*)&reply[12] = 0x01; // network type
+
+    reply[16] = 0x16; // beaconIeLen ???
+    reply[17] = 0x2F; // assocReqLen
+    reply[18] = 0x16; // assocRespLen
+    reply[19] = 0; // ?????
+
+    SendWMIEvent(1, 0x1002, reply, 20);
+
+    ConnectionStatus = 1;
+}
+
 //void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
 void DSi_NWifi::SendWMIEvent(u8 ep, u16 id, u8* data, u32 len)
 {
@@ -1055,6 +1231,44 @@ void DSi_NWifi::SendWMIAck()
         Mailbox[4]->Write(0);
 }
 
+void DSi_NWifi::SendWMIBSSInfo(u8 type, u8* data, u32 len)
+{
+    u32 wlen = 0;
+
+    // TODO: what is the trailer about?????
+    // on hardware I observed one frame with trailer and another without
+    // plus it's different from other frames
+
+    // TODO: check when version>=2 frame type is used?
+    // I observed the version<2 variant on my DSi
+
+    Mailbox[4]->Write(1);     // eid
+    Mailbox[4]->Write(0x00);  // flags
+    MB_Write16(4, len+2+16);  // data length (plus event ID and trailer)
+    Mailbox[4]->Write(0xFF);  // trailer length
+    Mailbox[4]->Write(0xFF);  //
+    MB_Write16(4, 0x1004);    // event ID
+    wlen += 8;
+
+    MB_Write16(4, 2437); // channel (6) (checkme!)
+    Mailbox[4]->Write(type);
+    Mailbox[4]->Write(0x1B); // 'snr'
+    MB_Write16(4, 0xFFBC);   // RSSI
+    MB_Write32(4, *(u32*)&WifiAP::APMac[0]);
+    MB_Write16(4, *(u16*)&WifiAP::APMac[4]);
+    MB_Write32(4, 0); // ieMask
+    wlen += 16;
+
+    for (int i = 0; i < len; i++)
+    {
+        Mailbox[4]->Write(data[i]);
+        wlen++;
+    }
+
+    for (; wlen & 0x7F; wlen++)
+        Mailbox[4]->Write(0);
+}
+
 
 u32 DSi_NWifi::WindowRead(u32 addr)
 {
@@ -1105,52 +1319,36 @@ void DSi_NWifi::WindowWrite(u32 addr, u32 val)
 
 void DSi_NWifi::_MSTimer()
 {
+    BeaconTimer++;
+
     if (ScanTimer > 0)
     {
         ScanTimer--;
 
+        // send a beacon
+        if (!(BeaconTimer & 0x7F))
+        {
+            u8 beacon[] =
+            {
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             // timestamp
+                0x80, 0x00,                                                 // beacon interval
+                0x21, 0x00,                                                 // capability,
+                0x01, 0x08, 0x82, 0x84, 0x8B, 0x96, 0x0C, 0x12, 0x18, 0x24, // rates
+                0x03, 0x01, 0x06,                                           // channel
+                0x05, 0x04, 0x00, 0x00, 0x00, 0x00,                         // TIM
+                0x00, 0x07, 'm', 'e', 'l', 'o', 'n', 'A', 'P',              // SSID
+            };
+
+            SendWMIBSSInfo(0x01, beacon, sizeof(beacon));
+            printf("send beacon\n");
+        }
+
         if (ScanTimer == 0)
         {
             u32 status = 0;
             SendWMIEvent(1, 0x100A, (u8*)&status, 4);
         }
     }
-
-    /*for (;;)
-    {
-        int rxlen = WifiAP::RecvPacket(RXBuffer);
-        if (rxlen == 0) return;
-        if (rxlen < 12+24) continue;
-
-        framelen = *(u16*)&RXBuffer[10];
-        if (framelen != rxlen-12)
-        {
-            printf("bad frame length\n");
-            continue;
-        }
-        framelen -= 4;
-
-        framectl = *(u16*)&RXBuffer[12+0];
-        if ((framectl & 0x00FC) == 0x0080) // beacon
-        {
-            printf("NWifi: got beacon\n");
-
-            u32 bodylen = framelen - 24;
-            if (bodylen > 256-16) bodylen = 256-16;
-
-            u8 beacon_evt[256];
-            memset(beacon_evt, 0, 256);
-            *(u16*)&beacon_evt[0] = 0x1004; // WMI_BSSINFO_EVENT
-            *(u16*)&beacon_evt[2] = 2442; // channel (in MHz???? welp)
-            beacon_evt[2] = 0x01; // frame type
-            beacon_evt[3] = 0x33; // 'snr' (???????)
-            *(u16*)&beacon_evt[4] = 0xFFD4; // 'rssi', 'snr'-95 (?????)
-            memcpy(&beacon_evt[6], &RXBuffer[12+16], 6); // BSSID
-            *(u32*)&beacon_evt[12] = 0; // ieMask (???????)
-            memcpy(&beacon_evt[16], &RXBuffer[12+24], bodylen); // frame body
-            //SendWMIFrame(beacon_evt, 16+bodylen, 1, 0, 0);
-        }
-    }*/
 }
 
 void DSi_NWifi::MSTimer(u32 param)
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index 68c37957..46cf714e 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -66,10 +66,14 @@ private:
 
     void HandleCommand();
     void BMI_Command();
+    void HTC_Command();
     void WMI_Command();
 
+    void WMI_ConnectToNetwork();
+
     void SendWMIEvent(u8 ep, u16 id, u8* data, u32 len);
     void SendWMIAck();
+    void SendWMIBSSInfo(u8 type, u8* data, u32 len);
 
     u32 WindowRead(u32 addr);
     void WindowWrite(u32 addr, u32 val);
@@ -127,6 +131,9 @@ private:
     u32 ErrorMask;
     u32 ScanTimer;
 
+    u64 BeaconTimer;
+    u32 ConnectionStatus;
+
     u8 RXBuffer[2048];
 };
 
diff --git a/src/WifiAP.cpp b/src/WifiAP.cpp
index 122e9d3a..ae9664cc 100644
--- a/src/WifiAP.cpp
+++ b/src/WifiAP.cpp
@@ -30,9 +30,6 @@
 namespace WifiAP
 {
 
-#define AP_MAC  0x00, 0xF0, 0x77, 0x77, 0x77, 0x77
-#define AP_NAME "melonAP"
-
 const u8 APMac[6] = {AP_MAC};
 
 #define PWRITE_8(p, v)      *p++ = v;
diff --git a/src/WifiAP.h b/src/WifiAP.h
index a2922bde..130383ee 100644
--- a/src/WifiAP.h
+++ b/src/WifiAP.h
@@ -22,6 +22,11 @@
 namespace WifiAP
 {
 
+#define AP_MAC  0x00, 0xF0, 0x77, 0x77, 0x77, 0x77
+#define AP_NAME "melonAP"
+
+extern const u8 APMac[6];
+
 bool Init();
 void DeInit();
 void Reset();

From 1101ed773bd9ed0b8024b987cc9e6621d58f8fea Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Tue, 16 Jun 2020 02:52:53 +0200
Subject: [PATCH 10/23] make it get further

---
 src/DSi_NWifi.cpp | 174 +++++++++++++++++++++++++++++++++++++++++++---
 src/DSi_NWifi.h   |   7 +-
 2 files changed, 171 insertions(+), 10 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index af93ccee..99da9320 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -22,6 +22,7 @@
 #include "DSi_NWifi.h"
 #include "SPI.h"
 #include "WifiAP.h"
+#include "Platform.h"
 
 
 const u8 CIS0[256] =
@@ -117,9 +118,17 @@ DSi_NWifi* Ctx = nullptr;
 
 DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
 {
-    // TODO: check the actual mailbox size (presumably 0x200)
+    // HACK
+    // the mailboxes are supposed to be 0x80 bytes
+    // however, as we do things instantly, emulating this is meaningless
+    // and only adds complication
     for (int i = 0; i < 8; i++)
-        Mailbox[i] = new FIFO<u8>(0x200);
+        Mailbox[i] = new FIFO<u8>(0x600);//0x80);
+
+    // extra FIFOs acting as bigger TX/RX buffers, to work on frames
+    // bigger than 0x80
+    //Mailbox[8] = new FIFO<u8>(0x608);
+    //Mailbox[9] = new FIFO<u8>(0x608);
 
     // this seems to control whether the firmware upload is done
     EEPROMReady = 0;
@@ -151,7 +160,6 @@ void DSi_NWifi::Reset()
     WindowReadAddr = 0;
     WindowWriteAddr = 0;
 
-    // TODO: check the actual mailbox size (presumably 0x200)
     for (int i = 0; i < 8; i++)
         Mailbox[i]->Clear();
 
@@ -687,7 +695,6 @@ void DSi_NWifi::HandleCommand()
 
 void DSi_NWifi::BMI_Command()
 {
-    // HLE command handling stub
     u32 cmd = MB_Read32(0);
 
     switch (cmd)
@@ -782,7 +789,6 @@ void DSi_NWifi::BMI_Command()
 
 void DSi_NWifi::HTC_Command()
 {
-    // HLE command handling stub
     u16 h0 = MB_Read16(0);
     u16 len = MB_Read16(0);
     u16 h2 = MB_Read16(0);
@@ -847,11 +853,18 @@ void DSi_NWifi::HTC_Command()
 
 void DSi_NWifi::WMI_Command()
 {
-    // HLE command handling stub
     u16 h0 = MB_Read16(0);
     u16 len = MB_Read16(0);
     u16 h2 = MB_Read16(0);
 
+    u8 ep = h0 & 0xFF;
+    if (ep > 0x01) // data endpoints
+    {
+        WMI_SendPacket(len);
+        MB_Drain(0);
+        return;
+    }
+
     u16 cmd = MB_Read16(0);
 
     switch (cmd)
@@ -863,6 +876,25 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x0003: // disconnect
+        {
+            if (ConnectionStatus != 1)
+                printf("WMI: ?? trying to disconnect while not connected\n");
+
+            printf("WMI: disconnect\n");
+            ConnectionStatus = 0;
+
+            u8 reply[10];
+            *(u16*)&reply[0] = 3; // checkme
+            memcpy(&reply[2], WifiAP::APMac, 6);
+            reply[8] = 3; // disconnect reason (via cmd)
+            reply[9] = 0; // assoc-response length (?????)
+            SendWMIEvent(1, 0x1003, reply, 10);
+
+            SendWMIAck();
+        }
+        break;
+
     case 0x0004: // synchronize
         {
             Mailbox[0]->Read();
@@ -1078,6 +1110,14 @@ void DSi_NWifi::WMI_Command()
         }
         break;
 
+    case 0x0049: // 'host exit notify'
+        {
+            //
+
+            SendWMIAck();
+        }
+        break;
+
     case 0xF000: // set bitrate
         {
             // TODO!
@@ -1090,8 +1130,8 @@ void DSi_NWifi::WMI_Command()
         break;
 
     default:
-        printf("unknown WMI command %04X\n", cmd);
-        for (int i = 0; i < len; i++)
+        printf("unknown WMI command %04X (header: %04X:%04X:%04X)\n", cmd, h0, len, h2);
+        for (int i = 0; i < len-2; i++)
         {
             printf("%02X ", Mailbox[0]->Read());
             if ((i&0xF)==0xF) printf("\n");
@@ -1161,6 +1201,65 @@ void DSi_NWifi::WMI_ConnectToNetwork()
     ConnectionStatus = 1;
 }
 
+void DSi_NWifi::WMI_SendPacket(u16 len)
+{
+    if (ConnectionStatus != 1)
+    {
+        printf("WMI: !! trying to send shit while not connected\n");
+        // TODO: report error??
+        return;
+    }
+
+    u16 hdr = MB_Read16(0);
+    if (hdr != 0x0000)
+    {
+        printf("WMI: special frame %04X\n", hdr);
+        return;
+    }
+
+    printf("WMI: send packet, len=%d\n", len);
+
+    u8 dstmac[6];
+    u8 srcmac[6];
+    u16 plen;
+
+    *(u32*)&dstmac[0] = MB_Read32(0);
+    *(u16*)&dstmac[4] = MB_Read16(0);
+    *(u32*)&srcmac[0] = MB_Read32(0);
+    *(u16*)&srcmac[4] = MB_Read16(0);
+    plen = MB_Read16(0);
+    plen = ((plen & 0xFF00) >> 8) | ((plen & 0x00FF) << 8);
+
+    if (plen > len-16)
+    {
+        printf("WMI: bad packet length %d > %d\n", plen, len-16);
+        return;
+    }
+
+    u32 h0 = MB_Read32(0);
+    u16 h1 = MB_Read16(0);
+
+    if (h0 != 0x0003AAAA || h1 != 0x0000)
+    {
+        printf("WMI: bad LLC/SLIP header\n");
+        return;
+    }
+
+    u16 ethertype = MB_Read16(0);
+
+    int lan_len = (plen - 8) + 14;
+
+    memcpy(&LANBuffer[0], dstmac, 6); // destination MAC
+    memcpy(&LANBuffer[6], srcmac, 6); // source MAC
+    *(u16*)&LANBuffer[12] = ethertype; // type
+    for (int i = 0; i < lan_len; i++)
+    {
+        LANBuffer[14+i] = Mailbox[0]->Read();
+    }
+
+    Platform::LAN_SendPacket(LANBuffer, lan_len);
+}
+
 //void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
 void DSi_NWifi::SendWMIEvent(u8 ep, u16 id, u8* data, u32 len)
 {
@@ -1269,6 +1368,58 @@ void DSi_NWifi::SendWMIBSSInfo(u8 type, u8* data, u32 len)
         Mailbox[4]->Write(0);
 }
 
+void DSi_NWifi::CheckRX()
+{
+    int rxlen = Platform::LAN_RecvPacket(LANBuffer);
+    if (rxlen > 0)
+    {
+        // check destination MAC
+        if (*(u32*)&LANBuffer[0] != 0xFFFFFFFF || *(u16*)&LANBuffer[4] != 0xFFFF)
+        {
+            if (memcmp(&LANBuffer[0], &EEPROM[0x00A], 6))
+                return;
+        }
+
+        // packet is good
+
+        printf("WMI: receive packet %04X, len=%d\n", *(u16*)&LANBuffer[12], rxlen);
+
+        int datalen = rxlen - 14; // length of packet body
+
+        int wlen = 0;
+        MB_Write16(4, 0x0002);
+        MB_Write16(4, 16 + 8 + datalen);
+        MB_Write16(4, 0x0000);
+        wlen += 6;
+
+        MB_Write16(4, 0x0000);
+        MB_Write32(4, *(u32*)&LANBuffer[0]);
+        MB_Write16(4, *(u16*)&LANBuffer[4]);
+        MB_Write32(4, *(u32*)&LANBuffer[6]);
+        MB_Write16(4, *(u16*)&LANBuffer[10]);
+        u16 plen = datalen + 8;
+        plen = ((plen & 0xFF00) >> 8) | ((plen & 0x00FF) << 8);
+        MB_Write16(4, plen);
+        wlen += 16;
+
+        MB_Write16(4, 0xAAAA);
+        MB_Write16(4, 0x0003);
+        MB_Write16(4, 0x0000);
+        MB_Write16(4, *(u16*)&LANBuffer[12]);
+        wlen += 8;
+
+        for (int i = 0; i < datalen; i++)
+            Mailbox[4]->Write(LANBuffer[14+i]);
+
+        wlen += datalen;
+
+        for (; wlen & 0x7F; wlen++)
+            Mailbox[4]->Write(0);
+
+        UpdateIRQ_F1();
+    }
+}
+
 
 u32 DSi_NWifi::WindowRead(u32 addr)
 {
@@ -1340,6 +1491,7 @@ void DSi_NWifi::_MSTimer()
             };
 
             SendWMIBSSInfo(0x01, beacon, sizeof(beacon));
+            UpdateIRQ_F1();
             printf("send beacon\n");
         }
 
@@ -1347,8 +1499,14 @@ void DSi_NWifi::_MSTimer()
         {
             u32 status = 0;
             SendWMIEvent(1, 0x100A, (u8*)&status, 4);
+            UpdateIRQ_F1();
         }
     }
+
+    if (ConnectionStatus == 1)
+    {
+        CheckRX();
+    }
 }
 
 void DSi_NWifi::MSTimer(u32 param)
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index 46cf714e..14a5d14c 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -70,11 +70,14 @@ private:
     void WMI_Command();
 
     void WMI_ConnectToNetwork();
+    void WMI_SendPacket(u16 len);
 
     void SendWMIEvent(u8 ep, u16 id, u8* data, u32 len);
     void SendWMIAck();
     void SendWMIBSSInfo(u8 type, u8* data, u32 len);
 
+    void CheckRX();
+
     u32 WindowRead(u32 addr);
     void WindowWrite(u32 addr, u32 val);
 
@@ -113,7 +116,7 @@ private:
         while (!Mailbox[n]->IsEmpty()) Mailbox[n]->Read();
     }
 
-    FIFO<u8>* Mailbox[8];
+    FIFO<u8>* Mailbox[10];
 
     u8 F0_IRQEnable;
     u8 F0_IRQStatus;
@@ -134,7 +137,7 @@ private:
     u64 BeaconTimer;
     u32 ConnectionStatus;
 
-    u8 RXBuffer[2048];
+    u8 LANBuffer[2048];
 };
 
 #endif // DSI_NWIFI_H

From 91ff63a19435833034f800267fab4ea6af675414 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Tue, 16 Jun 2020 14:09:54 +0200
Subject: [PATCH 11/23] fix slirp crash when exiting without having inited
 slirp also fix misc bugs

---
 src/DSi_NWifi.cpp                  | 25 ++++++++++++++++++++++---
 src/frontend/qt_sdl/LAN_Socket.cpp | 13 +++++++++++--
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index 99da9320..d158974b 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -1211,9 +1211,16 @@ void DSi_NWifi::WMI_SendPacket(u16 len)
     }
 
     u16 hdr = MB_Read16(0);
-    if (hdr != 0x0000)
+    hdr = ((hdr & 0xFF00) >> 8) | ((hdr & 0x00FF) << 8);
+    if (hdr & 0x0003)
     {
-        printf("WMI: special frame %04X\n", hdr);
+        printf("WMI: special frame %04X len=%d\n", hdr, len);
+        for (int i = 0; i < len-2; i++)
+        {
+            printf("%02X ", Mailbox[0]->Read());
+            if ((i&0xF)==0xF) printf("\n");
+        }
+        printf("\n");
         return;
     }
 
@@ -1252,11 +1259,18 @@ void DSi_NWifi::WMI_SendPacket(u16 len)
     memcpy(&LANBuffer[0], dstmac, 6); // destination MAC
     memcpy(&LANBuffer[6], srcmac, 6); // source MAC
     *(u16*)&LANBuffer[12] = ethertype; // type
-    for (int i = 0; i < lan_len; i++)
+    for (int i = 0; i < lan_len-14; i++)
     {
         LANBuffer[14+i] = Mailbox[0]->Read();
     }
 
+    for (int i = 0; i < lan_len; i++)
+    {
+        printf("%02X ", LANBuffer[i]);
+        if ((i&0xF)==0xF) printf("\n");
+    }
+    printf("\n");
+
     Platform::LAN_SendPacket(LANBuffer, lan_len);
 }
 
@@ -1373,6 +1387,7 @@ void DSi_NWifi::CheckRX()
     int rxlen = Platform::LAN_RecvPacket(LANBuffer);
     if (rxlen > 0)
     {
+        printf("WMI packet recv %04X %04X %04X\n", *(u16*)&LANBuffer[0], *(u16*)&LANBuffer[2], *(u16*)&LANBuffer[4]);
         // check destination MAC
         if (*(u32*)&LANBuffer[0] != 0xFFFFFFFF || *(u16*)&LANBuffer[4] != 0xFFFF)
         {
@@ -1380,6 +1395,10 @@ void DSi_NWifi::CheckRX()
                 return;
         }
 
+        // check source MAC, in case we get a packet we just sent out
+        if (!memcmp(&LANBuffer[6], &EEPROM[0x00A], 6))
+            return;
+
         // packet is good
 
         printf("WMI: receive packet %04X, len=%d\n", *(u16*)&LANBuffer[12], rxlen);
diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 5477a7d3..13a8eb1f 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -52,7 +52,7 @@ volatile int RXNum;
 
 u32 IPv4ID;
 
-Slirp* Ctx;
+Slirp* Ctx = nullptr;
 
 const int FDListMax = 64;
 struct pollfd FDList[FDListMax];
@@ -164,6 +164,7 @@ void SlirpCbUnregisterPollFD(int fd, void* opaque)
 
 void SlirpCbNotify(void* opaque)
 {
+    printf("Slirp: notify???\n");
 }
 
 SlirpCb cb =
@@ -205,7 +206,11 @@ bool Init()
 
 void DeInit()
 {
-    slirp_cleanup(Ctx);
+    if (Ctx)
+    {
+        slirp_cleanup(Ctx);
+        Ctx = nullptr;
+    }
 }
 
 
@@ -411,6 +416,8 @@ void HandleDNSFrame(u8* data, int len)
 
 int SendPacket(u8* data, int len)
 {
+    if (!Ctx) return 0;
+
     if (len > 2048)
     {
         printf("LAN_SendPacket: error: packet too long (%d)\n", len);
@@ -496,6 +503,8 @@ int SlirpCbGetREvents(int idx, void* opaque)
 
 int RecvPacket(u8* data)
 {
+    if (!Ctx) return 0;
+
     int ret = 0;
 
     if (FDListSize > 0)

From b31e049b3068683f3eac4a2deba4686aa3471a67 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 01:43:32 +0200
Subject: [PATCH 12/23] wifi fixes and shit. getting there, somewhat.

---
 src/DSi_NWifi.cpp                  | 773 +++++++++++++++--------------
 src/DSi_NWifi.h                    |   5 +-
 src/FIFO.h                         |   2 +
 src/frontend/qt_sdl/LAN_Socket.cpp | 104 ++--
 4 files changed, 460 insertions(+), 424 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index d158974b..84b39fa6 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -125,10 +125,8 @@ DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
     for (int i = 0; i < 8; i++)
         Mailbox[i] = new FIFO<u8>(0x600);//0x80);
 
-    // extra FIFOs acting as bigger TX/RX buffers, to work on frames
-    // bigger than 0x80
-    //Mailbox[8] = new FIFO<u8>(0x608);
-    //Mailbox[9] = new FIFO<u8>(0x608);
+    // extra mailbox acting as a bigger RX buffer
+    Mailbox[8] = new FIFO<u8>(0x8000);
 
     // this seems to control whether the firmware upload is done
     EEPROMReady = 0;
@@ -138,7 +136,7 @@ DSi_NWifi::DSi_NWifi(DSi_SDHost* host) : DSi_SDDevice(host)
 
 DSi_NWifi::~DSi_NWifi()
 {
-    for (int i = 0; i < 8; i++)
+    for (int i = 0; i < 9; i++)
         delete Mailbox[i];
 
     NDS::CancelEvent(NDS::Event_DSi_NWifi);
@@ -160,7 +158,7 @@ void DSi_NWifi::Reset()
     WindowReadAddr = 0;
     WindowWriteAddr = 0;
 
-    for (int i = 0; i < 8; i++)
+    for (int i = 0; i < 9; i++)
         Mailbox[i]->Clear();
 
     u8* mac = SPI_Firmware::GetWifiMAC();
@@ -183,6 +181,8 @@ void DSi_NWifi::Reset()
 
     *(u16*)&EEPROM[0x004] = chk;
 
+    // TODO: SDIO reset shouldn't reset this
+    // this is reset by the internal reset register, and that also resets EEPROM init
     BootPhase = 0;
 
     ErrorMask = 0;
@@ -308,6 +308,7 @@ u8 DSi_NWifi::F1_Read(u32 addr)
     if (addr < 0x100)
     {
         u8 ret = Mailbox[4]->Read();
+        if (addr == 0xFF) DrainRXBuffer();
         UpdateIRQ_F1();
         return ret;
     }
@@ -373,6 +374,7 @@ u8 DSi_NWifi::F1_Read(u32 addr)
     else if (addr < 0x1000)
     {
         u8 ret = Mailbox[4]->Read();
+        if (addr == 0xFFF) DrainRXBuffer();
         UpdateIRQ_F1();
         return ret;
     }
@@ -397,11 +399,12 @@ u8 DSi_NWifi::F1_Read(u32 addr)
     else
     {
         u8 ret = Mailbox[4]->Read();
+        if (addr == 0x3FFF) DrainRXBuffer();
         UpdateIRQ_F1();
         return ret;
     }
 
-    printf("NWIFI: unknown func1 read %05X\n", addr);
+    //printf("NWIFI: unknown func1 read %05X\n", addr);
     return 0;
 }
 
@@ -859,287 +862,257 @@ void DSi_NWifi::WMI_Command()
 
     u8 ep = h0 & 0xFF;
     if (ep > 0x01) // data endpoints
-    {
+    {printf("WMI PACKET %04X:%04X:%04X\n", h0, len, h2);
         WMI_SendPacket(len);
-        MB_Drain(0);
-        return;
     }
-
-    u16 cmd = MB_Read16(0);
-
-    switch (cmd)
+    else
     {
-    case 0x0001: // connect to network
-        {
-            WMI_ConnectToNetwork();
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0003: // disconnect
-        {
-            if (ConnectionStatus != 1)
-                printf("WMI: ?? trying to disconnect while not connected\n");
-
-            printf("WMI: disconnect\n");
-            ConnectionStatus = 0;
-
-            u8 reply[10];
-            *(u16*)&reply[0] = 3; // checkme
-            memcpy(&reply[2], WifiAP::APMac, 6);
-            reply[8] = 3; // disconnect reason (via cmd)
-            reply[9] = 0; // assoc-response length (?????)
-            SendWMIEvent(1, 0x1003, reply, 10);
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0004: // synchronize
-        {
-            Mailbox[0]->Read();
-            // TODO??
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0005: // create priority stream
-        {
-            // TODO???
-            // there's a lot of crap in there.
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0007: // start scan
-        {
-            u32 forcefg = MB_Read32(0);
-            u32 legacy = MB_Read32(0);
-            u32 scantime = MB_Read32(0);
-            u32 forceinterval = MB_Read32(0);
-            u8 scantype = Mailbox[0]->Read();
-            u8 nchannels = Mailbox[0]->Read();
-
-            printf("WMI: start scan, forceFG=%d, legacy=%d, scanTime=%d, interval=%d, scanType=%d, chan=%d\n",
-                   forcefg, legacy, scantime, forceinterval, scantype, nchannels);
-
-            if (ScanTimer > 0)
+        u16 cmd = MB_Read16(0);
+    printf("WMI CMD: %04X:%04X:%04X %04X\n", h0, len, h2, cmd);
+            for (int i = 0; i < len-2; i++)
             {
-                printf("!! CHECKME: START SCAN BUT WAS ALREADY SCANNING (%d)\n", ScanTimer);
+                printf("%02X ", Mailbox[0]->Peek(i));
+                if ((i&0xF)==0xF) printf("\n");
             }
-
-            // checkme
-            ScanTimer = scantime*5;
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0008: // set scan params
-        {
-            // TODO: do something with the params!!
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0009: // set BSS filter
-        {
-            // TODO: do something with the params!!
-            u8 bssfilter = Mailbox[0]->Read();
-            Mailbox[0]->Read();
-            Mailbox[0]->Read();
-            Mailbox[0]->Read();
-            u32 iemask = MB_Read32(0);
-
-            printf("WMI: set BSS filter, filter=%02X, iemask=%08X\n", bssfilter, iemask);
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x000A: // set probed BSSID
-        {
-            u8 id = Mailbox[0]->Read();
-            u8 flags = Mailbox[0]->Read();
-            u8 len = Mailbox[0]->Read();
-
-            char ssid[33] = {0};
-            for (int i = 0; i < len && i < 32; i++)
-                ssid[i] = Mailbox[0]->Read();
-
-            // TODO: store it somewhere
-            printf("WMI: set probed SSID: id=%d, flags=%02X, len=%d, SSID=%s\n", id, flags, len, ssid);
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x000D: // set disconnect timeout
-        {
-            Mailbox[0]->Read();
-            // TODO??
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x000E: // get channel list
-        {
-            int nchan = 11; // TODO: customize??
-            u8 reply[2 + (nchan*2) + 2];
-
-            reply[0] = 0;
-            reply[1] = nchan;
-            for (int i = 0; i < nchan; i++)
-                *(u16*)&reply[2 + (i*2)] = 2412 + (i*5);
-            *(u16*)&reply[2 + (nchan*2)] = 0;
-
-            SendWMIEvent(1, 0x000E, reply, 4+(nchan*2));
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0011: // set channel params
-        {
-            Mailbox[0]->Read();
-            u8 scan = Mailbox[0]->Read();
-            u8 phymode = Mailbox[0]->Read();
-            u8 len = Mailbox[0]->Read();
-
-            u16 channels[32];
-            for (int i = 0; i < len && i < 32; i++)
-                channels[i] = MB_Read16(0);
-
-            // TODO: store it somewhere
-            printf("WMI: set channel params: scan=%d, phymode=%d, len=%d, channels=", scan, phymode, len);
-            for (int i = 0; i < len && i < 32; i++)
-                printf("%d,", channels[i]);
             printf("\n");
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0012: // set power mode
+        switch (cmd)
         {
-            Mailbox[0]->Read();
-            // TODO??
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0017: // dummy?
-        Mailbox[0]->Read();
-        SendWMIAck();
-        break;
-
-    case 0x0022: // set error bitmask
-        {
-            ErrorMask = MB_Read32(0);
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x002E: // extension shit
-        {
-            u16 extcmd = MB_Read16(0);
-            switch (extcmd)
+        case 0x0001: // connect to network
             {
-            case 0x2008: // 'heartbeat'??
-                {
-                    u32 cookie = MB_Read32(0);
-                    u32 source = MB_Read32(0);
-
-                    u8 reply[10];
-                    *(u16*)&reply[0] = 0x3007;
-                    *(u32*)&reply[2] = cookie;
-                    *(u32*)&reply[6] = source;
-                    SendWMIEvent(1, 0x1010, reply, 10);
-                }
-                break;
-
-            default:
-                printf("WMI: unknown ext cmd 002E:%04X\n", extcmd);
-                break;
+                WMI_ConnectToNetwork();
             }
+            break;
 
-            SendWMIAck();
-        }
-        break;
+        case 0x0003: // disconnect
+            {
+                if (ConnectionStatus != 1)
+                    printf("WMI: ?? trying to disconnect while not connected\n");
 
-    case 0x003D: // set keepalive interval
-        {
+                printf("WMI: disconnect\n");
+                ConnectionStatus = 0;
+
+                u8 reply[10];
+                *(u16*)&reply[0] = 3; // checkme
+                memcpy(&reply[2], WifiAP::APMac, 6);
+                reply[8] = 3; // disconnect reason (via cmd)
+                reply[9] = 0; // assoc-response length (?????)
+                SendWMIEvent(1, 0x1003, reply, 10);
+            }
+            break;
+
+        case 0x0004: // synchronize
+            {
+                Mailbox[0]->Read();
+                // TODO??
+            }
+            break;
+
+        case 0x0005: // create priority stream
+            {
+                // TODO???
+                // there's a lot of crap in there.
+            }
+            break;
+
+        case 0x0007: // start scan
+            {
+                u32 forcefg = MB_Read32(0);
+                u32 legacy = MB_Read32(0);
+                u32 scantime = MB_Read32(0);
+                u32 forceinterval = MB_Read32(0);
+                u8 scantype = Mailbox[0]->Read();
+                u8 nchannels = Mailbox[0]->Read();
+
+                printf("WMI: start scan, forceFG=%d, legacy=%d, scanTime=%d, interval=%d, scanType=%d, chan=%d\n",
+                       forcefg, legacy, scantime, forceinterval, scantype, nchannels);
+
+                if (ScanTimer > 0)
+                {
+                    printf("!! CHECKME: START SCAN BUT WAS ALREADY SCANNING (%d)\n", ScanTimer);
+                }
+
+                // checkme
+                ScanTimer = scantime*5;
+            }
+            break;
+
+        case 0x0008: // set scan params
+            {
+                // TODO: do something with the params!!
+            }
+            break;
+
+        case 0x0009: // set BSS filter
+            {
+                // TODO: do something with the params!!
+                u8 bssfilter = Mailbox[0]->Read();
+                Mailbox[0]->Read();
+                Mailbox[0]->Read();
+                Mailbox[0]->Read();
+                u32 iemask = MB_Read32(0);
+
+                printf("WMI: set BSS filter, filter=%02X, iemask=%08X\n", bssfilter, iemask);
+            }
+            break;
+
+        case 0x000A: // set probed BSSID
+            {
+                u8 id = Mailbox[0]->Read();
+                u8 flags = Mailbox[0]->Read();
+                u8 len = Mailbox[0]->Read();
+
+                char ssid[33] = {0};
+                for (int i = 0; i < len && i < 32; i++)
+                    ssid[i] = Mailbox[0]->Read();
+
+                // TODO: store it somewhere
+                printf("WMI: set probed SSID: id=%d, flags=%02X, len=%d, SSID=%s\n", id, flags, len, ssid);
+            }
+            break;
+
+        case 0x000D: // set disconnect timeout
+            {
+                Mailbox[0]->Read();
+                // TODO??
+            }
+            break;
+
+        case 0x000E: // get channel list
+            {
+                int nchan = 11; // TODO: customize??
+                u8 reply[2 + (nchan*2) + 2];
+
+                reply[0] = 0;
+                reply[1] = nchan;
+                for (int i = 0; i < nchan; i++)
+                    *(u16*)&reply[2 + (i*2)] = 2412 + (i*5);
+                *(u16*)&reply[2 + (nchan*2)] = 0;
+
+                SendWMIEvent(1, 0x000E, reply, 4+(nchan*2));
+            }
+            break;
+
+        case 0x0011: // set channel params
+            {
+                Mailbox[0]->Read();
+                u8 scan = Mailbox[0]->Read();
+                u8 phymode = Mailbox[0]->Read();
+                u8 len = Mailbox[0]->Read();
+
+                u16 channels[32];
+                for (int i = 0; i < len && i < 32; i++)
+                    channels[i] = MB_Read16(0);
+
+                // TODO: store it somewhere
+                printf("WMI: set channel params: scan=%d, phymode=%d, len=%d, channels=", scan, phymode, len);
+                for (int i = 0; i < len && i < 32; i++)
+                    printf("%d,", channels[i]);
+                printf("\n");
+            }
+            break;
+
+        case 0x0012: // set power mode
+            {
+                Mailbox[0]->Read();
+                // TODO??
+            }
+            break;
+
+        case 0x0017: // dummy?
             Mailbox[0]->Read();
-            // TODO??
+            break;
 
-            SendWMIAck();
+        case 0x0022: // set error bitmask
+            {
+                ErrorMask = MB_Read32(0);
+            }
+            break;
+
+        case 0x002E: // extension shit
+            {
+                u32 extcmd = MB_Read32(0);
+                switch (extcmd)
+                {
+                case 0x2008: // 'heartbeat'??
+                    {
+                        u32 cookie = MB_Read32(0);
+                        u32 source = MB_Read32(0);
+
+                        u8 reply[12];
+                        *(u32*)&reply[0] = 0x3007;
+                        *(u32*)&reply[4] = cookie;
+                        *(u32*)&reply[8] = source;
+
+                        if(ConnectionStatus==1)SendWMIEvent(1, 0x1010, reply, 12);
+                    }
+                    break;
+
+                default:
+                    printf("WMI: unknown ext cmd 002E:%04X\n", extcmd);
+                    break;
+                }
+            }
+            break;
+
+        case 0x003D: // set keepalive interval
+            {
+                Mailbox[0]->Read();
+                // TODO??
+            }
+            break;
+
+        case 0x0041: // 'WMI_SET_WSC_STATUS_CMD'
+            {
+                Mailbox[0]->Read();
+                // TODO??
+            }
+            break;
+
+        case 0x0047: // cmd47 -- timer shenanigans??
+            {
+                //
+            }
+            break;
+
+        case 0x0048: // not supported by DSi??
+            {
+                MB_Read32(0);
+                MB_Read32(0);
+                Mailbox[0]->Read();
+                Mailbox[0]->Read();
+            }
+            break;
+
+        case 0x0049: // 'host exit notify'
+            {
+                //
+            }
+            break;
+
+        case 0xF000: // set bitrate
+            {
+                // TODO!
+                Mailbox[0]->Read();
+                Mailbox[0]->Read();
+                Mailbox[0]->Read();
+            }
+            break;
+
+        default:
+            printf("unknown WMI command %04X (header: %04X:%04X:%04X)\n", cmd, h0, len, h2);
+            for (int i = 0; i < len-2; i++)
+            {
+                printf("%02X ", Mailbox[0]->Read());
+                if ((i&0xF)==0xF) printf("\n");
+            }
+            printf("\n");
+            break;
         }
-        break;
-
-    case 0x0041: // 'WMI_SET_WSC_STATUS_CMD'
-        {
-            Mailbox[0]->Read();
-            // TODO??
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0047: // cmd47 -- timer shenanigans??
-        {
-            //
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0048: // not supported by DSi??
-        {
-            MB_Read32(0);
-            MB_Read32(0);
-            Mailbox[0]->Read();
-            Mailbox[0]->Read();
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0x0049: // 'host exit notify'
-        {
-            //
-
-            SendWMIAck();
-        }
-        break;
-
-    case 0xF000: // set bitrate
-        {
-            // TODO!
-            Mailbox[0]->Read();
-            Mailbox[0]->Read();
-            Mailbox[0]->Read();
-
-            SendWMIAck();
-        }
-        break;
-
-    default:
-        printf("unknown WMI command %04X (header: %04X:%04X:%04X)\n", cmd, h0, len, h2);
-        for (int i = 0; i < len-2; i++)
-        {
-            printf("%02X ", Mailbox[0]->Read());
-            if ((i&0xF)==0xF) printf("\n");
-        }
-        printf("\n");
-        break;
     }
 
+    if (h0 & (1<<8))
+        SendWMIAck(ep);
+
     MB_Drain(0);
 }
 
@@ -1210,9 +1183,30 @@ void DSi_NWifi::WMI_SendPacket(u16 len)
         return;
     }
 
+    // header???
+    // packets with bit1=1 are something special (sync??)
+    // otherwise, ????
+    // header is 001C on ARP frames, 0000 otherwise
     u16 hdr = MB_Read16(0);
     hdr = ((hdr & 0xFF00) >> 8) | ((hdr & 0x00FF) << 8);
-    if (hdr & 0x0003)
+    u16 type = hdr & 0x0003;
+
+    if (type == 2) // data sync
+    {
+        printf("WMI: data sync\n");
+
+        /*Mailbox[8]->Write(2);    // eid
+        Mailbox[8]->Write(0x00);  // flags
+        MB_Write16(8, 2);         // data length
+        Mailbox[8]->Write(0);     //
+        Mailbox[8]->Write(0);     //
+        MB_Write16(8, 0x0200);    //
+
+        DrainRXBuffer();*/
+        return;
+    }
+
+    if (type)
     {
         printf("WMI: special frame %04X len=%d\n", hdr, len);
         for (int i = 0; i < len-2; i++)
@@ -1224,7 +1218,7 @@ void DSi_NWifi::WMI_SendPacket(u16 len)
         return;
     }
 
-    printf("WMI: send packet, len=%d\n", len);
+    printf("WMI: send packet, hdr=%04X, len=%d\n", hdr, len);
 
     u8 dstmac[6];
     u8 srcmac[6];
@@ -1264,130 +1258,125 @@ void DSi_NWifi::WMI_SendPacket(u16 len)
         LANBuffer[14+i] = Mailbox[0]->Read();
     }
 
-    for (int i = 0; i < lan_len; i++)
+    /*for (int i = 0; i < lan_len; i++)
     {
         printf("%02X ", LANBuffer[i]);
         if ((i&0xF)==0xF) printf("\n");
     }
-    printf("\n");
+    printf("\n");*/
 
     Platform::LAN_SendPacket(LANBuffer, lan_len);
 }
 
-//void DSi_NWifi::SendWMIFrame(u8* data, u32 len, u8 ep, u8 flags, u16 ctrl)
 void DSi_NWifi::SendWMIEvent(u8 ep, u16 id, u8* data, u32 len)
 {
-    u32 wlen = 0;
+    if (!Mailbox[8]->CanFit(6+len+2+8))
+    {
+        printf("NWifi: !! not enough space in RX buffer for WMI event %04X\n", id);
+        return;
+    }
 
-    Mailbox[4]->Write(ep);    // eid
-    Mailbox[4]->Write(0x02);  // flags (trailer)
-    MB_Write16(4, len+2+8);   // data length (plus event ID and trailer)
-    Mailbox[4]->Write(8);     // trailer length
-    Mailbox[4]->Write(0);     //
-    MB_Write16(4, id);        // event ID
-    wlen += 8;
+    Mailbox[8]->Write(ep);    // eid
+    Mailbox[8]->Write(0x02);  // flags (trailer)
+    MB_Write16(8, len+2+8);   // data length (plus event ID and trailer)
+    Mailbox[8]->Write(8);     // trailer length
+    Mailbox[8]->Write(0);     //
+    MB_Write16(8, id);        // event ID
 
     for (int i = 0; i < len; i++)
     {
-        Mailbox[4]->Write(data[i]);
-        wlen++;
+        Mailbox[8]->Write(data[i]);
     }
 
     // trailer
-    Mailbox[4]->Write(0x02);
-    Mailbox[4]->Write(0x06);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    wlen += 8;
+    Mailbox[8]->Write(0x02);
+    Mailbox[8]->Write(0x06);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
 
-    for (; wlen & 0x7F; wlen++)
-        Mailbox[4]->Write(0);
+    DrainRXBuffer();
 }
 
-void DSi_NWifi::SendWMIAck()
+void DSi_NWifi::SendWMIAck(u8 ep)
 {
-    u32 wlen = 0;
+    if (!Mailbox[8]->CanFit(6+12))
+    {
+        printf("NWifi: !! not enough space in RX buffer for WMI ack (ep #%d)\n", ep);
+        return;
+    }
 
-    Mailbox[4]->Write(0);     // eid
-    Mailbox[4]->Write(0x02);  // flags (trailer)
-    MB_Write16(4, 0xC);       // data length (plus event ID and trailer)
-    Mailbox[4]->Write(0xC);   // trailer length
-    Mailbox[4]->Write(0);     //
-    wlen += 6;
+    Mailbox[8]->Write(0);     // eid
+    Mailbox[8]->Write(0x02);  // flags (trailer)
+    MB_Write16(8, 0xC);       // data length (plus trailer)
+    Mailbox[8]->Write(0xC);   // trailer length
+    Mailbox[8]->Write(0);     //
 
-    // trailer
-    Mailbox[4]->Write(0x01);
-    Mailbox[4]->Write(0x02);
-    Mailbox[4]->Write(0x01);
-    Mailbox[4]->Write(0x01);
-    Mailbox[4]->Write(0x02);
-    Mailbox[4]->Write(0x06);
+    // credit report
+    Mailbox[8]->Write(0x01);
+    Mailbox[8]->Write(0x02);
+    Mailbox[8]->Write(ep);
+    Mailbox[8]->Write(0x01);
 
-    // observed trailer data:
-    // 00 06 00 00 02 00 (in the first few responses)
-    // 00 00 00 00 00 00
-    // TODO: work out what that all means?
-    // does software even care?
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x06);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x00);
-    Mailbox[4]->Write(0x02);
-    Mailbox[4]->Write(0x00);
-    wlen += 0xC;
+    // lookahead
+    Mailbox[8]->Write(0x02);
+    Mailbox[8]->Write(0x06);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
+    Mailbox[8]->Write(0x00);
 
-    for (; wlen & 0x7F; wlen++)
-        Mailbox[4]->Write(0);
+    DrainRXBuffer();
 }
 
 void DSi_NWifi::SendWMIBSSInfo(u8 type, u8* data, u32 len)
 {
-    u32 wlen = 0;
-
-    // TODO: what is the trailer about?????
-    // on hardware I observed one frame with trailer and another without
-    // plus it's different from other frames
+    if (!Mailbox[8]->CanFit(6+len+2+16))
+    {
+        printf("NWifi: !! not enough space in RX buffer for WMI BSSINFO event\n");
+        return;
+    }
 
     // TODO: check when version>=2 frame type is used?
     // I observed the version<2 variant on my DSi
 
-    Mailbox[4]->Write(1);     // eid
-    Mailbox[4]->Write(0x00);  // flags
-    MB_Write16(4, len+2+16);  // data length (plus event ID and trailer)
-    Mailbox[4]->Write(0xFF);  // trailer length
-    Mailbox[4]->Write(0xFF);  //
-    MB_Write16(4, 0x1004);    // event ID
-    wlen += 8;
+    Mailbox[8]->Write(1);     // eid
+    Mailbox[8]->Write(0x00);  // flags
+    MB_Write16(8, len+2+16);  // data length (plus event ID and trailer)
+    Mailbox[8]->Write(0xFF);  // trailer length
+    Mailbox[8]->Write(0xFF);  //
+    MB_Write16(8, 0x1004);    // event ID
 
-    MB_Write16(4, 2437); // channel (6) (checkme!)
-    Mailbox[4]->Write(type);
-    Mailbox[4]->Write(0x1B); // 'snr'
-    MB_Write16(4, 0xFFBC);   // RSSI
-    MB_Write32(4, *(u32*)&WifiAP::APMac[0]);
-    MB_Write16(4, *(u16*)&WifiAP::APMac[4]);
-    MB_Write32(4, 0); // ieMask
-    wlen += 16;
+    MB_Write16(8, 2437); // channel (6) (checkme!)
+    Mailbox[8]->Write(type);
+    Mailbox[8]->Write(0x1B); // 'snr'
+    MB_Write16(8, 0xFFBC);   // RSSI
+    MB_Write32(8, *(u32*)&WifiAP::APMac[0]);
+    MB_Write16(8, *(u16*)&WifiAP::APMac[4]);
+    MB_Write32(8, 0); // ieMask
 
     for (int i = 0; i < len; i++)
     {
-        Mailbox[4]->Write(data[i]);
-        wlen++;
+        Mailbox[8]->Write(data[i]);
     }
 
-    for (; wlen & 0x7F; wlen++)
-        Mailbox[4]->Write(0);
+    DrainRXBuffer();
 }
 
 void DSi_NWifi::CheckRX()
 {
+    if (!Mailbox[8]->CanFit(2048))
+        return;
+
     int rxlen = Platform::LAN_RecvPacket(LANBuffer);
     if (rxlen > 0)
     {
-        printf("WMI packet recv %04X %04X %04X\n", *(u16*)&LANBuffer[0], *(u16*)&LANBuffer[2], *(u16*)&LANBuffer[4]);
+        //printf("WMI packet recv %04X %04X %04X\n", *(u16*)&LANBuffer[0], *(u16*)&LANBuffer[2], *(u16*)&LANBuffer[4]);
         // check destination MAC
         if (*(u32*)&LANBuffer[0] != 0xFFFFFFFF || *(u16*)&LANBuffer[4] != 0xFFFF)
         {
@@ -1403,39 +1392,47 @@ void DSi_NWifi::CheckRX()
 
         printf("WMI: receive packet %04X, len=%d\n", *(u16*)&LANBuffer[12], rxlen);
 
+        /*for (int i = 0; i < rxlen; i++)
+        {
+            printf("%02X ", LANBuffer[i]);
+            if ((i&0xF)==0xF) printf("\n");
+        }
+        printf("\n");*/
+
         int datalen = rxlen - 14; // length of packet body
 
-        int wlen = 0;
-        MB_Write16(4, 0x0002);
-        MB_Write16(4, 16 + 8 + datalen);
-        MB_Write16(4, 0x0000);
-        wlen += 6;
+        u16 hdr = 0x0000;
+        //if (*(u16*)&LANBuffer[12] == 0x0608) // HAX!!!
+        //    hdr = 0x1C00;
+        hdr = 0x80;
 
-        MB_Write16(4, 0x0000);
-        MB_Write32(4, *(u32*)&LANBuffer[0]);
-        MB_Write16(4, *(u16*)&LANBuffer[4]);
-        MB_Write32(4, *(u32*)&LANBuffer[6]);
-        MB_Write16(4, *(u16*)&LANBuffer[10]);
+        // TODO: not hardcode the endpoint ID!!
+        u8 ep = 2;
+
+        Mailbox[8]->Write(ep);
+        Mailbox[8]->Write(0x00);
+        MB_Write16(8, 16 + 8 + datalen);
+        Mailbox[8]->Write(0);
+        Mailbox[8]->Write(0);
+
+        MB_Write16(8, hdr);
+        MB_Write32(8, *(u32*)&LANBuffer[0]);
+        MB_Write16(8, *(u16*)&LANBuffer[4]);
+        MB_Write32(8, *(u32*)&LANBuffer[6]);
+        MB_Write16(8, *(u16*)&LANBuffer[10]);
         u16 plen = datalen + 8;
         plen = ((plen & 0xFF00) >> 8) | ((plen & 0x00FF) << 8);
-        MB_Write16(4, plen);
-        wlen += 16;
+        MB_Write16(8, plen);
 
-        MB_Write16(4, 0xAAAA);
-        MB_Write16(4, 0x0003);
-        MB_Write16(4, 0x0000);
-        MB_Write16(4, *(u16*)&LANBuffer[12]);
-        wlen += 8;
+        MB_Write16(8, 0xAAAA);
+        MB_Write16(8, 0x0003);
+        MB_Write16(8, 0x0000);
+        MB_Write16(8, *(u16*)&LANBuffer[12]);
 
         for (int i = 0; i < datalen; i++)
-            Mailbox[4]->Write(LANBuffer[14+i]);
+            Mailbox[8]->Write(LANBuffer[14+i]);
 
-        wlen += datalen;
-
-        for (; wlen & 0x7F; wlen++)
-            Mailbox[4]->Write(0);
-
-        UpdateIRQ_F1();
+        DrainRXBuffer();
     }
 }
 
@@ -1510,7 +1507,6 @@ void DSi_NWifi::_MSTimer()
             };
 
             SendWMIBSSInfo(0x01, beacon, sizeof(beacon));
-            UpdateIRQ_F1();
             printf("send beacon\n");
         }
 
@@ -1518,16 +1514,35 @@ void DSi_NWifi::_MSTimer()
         {
             u32 status = 0;
             SendWMIEvent(1, 0x100A, (u8*)&status, 4);
-            UpdateIRQ_F1();
         }
     }
 
     if (ConnectionStatus == 1)
     {
-        CheckRX();
+        //if (Mailbox[4]->IsEmpty())
+            CheckRX();
     }
 }
 
+void DSi_NWifi::DrainRXBuffer()
+{
+    while (Mailbox[8]->Level() >= 6)
+    {
+        u16 len = Mailbox[8]->Peek(2) | (Mailbox[8]->Peek(3) << 8);
+        u32 totallen = len + 6;
+        u32 required = (totallen + 0x7F) & ~0x7F;
+
+        if (!Mailbox[4]->CanFit(required))
+            break;
+
+        u32 i = 0;
+        for (; i < totallen; i++) Mailbox[4]->Write(Mailbox[8]->Read());
+        for (; i < required; i++) Mailbox[4]->Write(0);
+    }
+
+    UpdateIRQ_F1();
+}
+
 void DSi_NWifi::MSTimer(u32 param)
 {
     Ctx->_MSTimer();
diff --git a/src/DSi_NWifi.h b/src/DSi_NWifi.h
index 14a5d14c..a72d54d5 100644
--- a/src/DSi_NWifi.h
+++ b/src/DSi_NWifi.h
@@ -73,10 +73,11 @@ private:
     void WMI_SendPacket(u16 len);
 
     void SendWMIEvent(u8 ep, u16 id, u8* data, u32 len);
-    void SendWMIAck();
+    void SendWMIAck(u8 ep);
     void SendWMIBSSInfo(u8 type, u8* data, u32 len);
 
     void CheckRX();
+    void DrainRXBuffer();
 
     u32 WindowRead(u32 addr);
     void WindowWrite(u32 addr, u32 val);
@@ -116,7 +117,7 @@ private:
         while (!Mailbox[n]->IsEmpty()) Mailbox[n]->Read();
     }
 
-    FIFO<u8>* Mailbox[10];
+    FIFO<u8>* Mailbox[9];
 
     u8 F0_IRQEnable;
     u8 F0_IRQStatus;
diff --git a/src/FIFO.h b/src/FIFO.h
index fe0b2aa6..2b2c1020 100644
--- a/src/FIFO.h
+++ b/src/FIFO.h
@@ -102,6 +102,8 @@ public:
     bool IsEmpty() { return NumOccupied == 0; }
     bool IsFull() { return NumOccupied >= NumEntries; }
 
+    bool CanFit(u32 num) { return ((NumOccupied + num) <= NumEntries); }
+
 private:
     u32 NumEntries;
     T* Entries;
diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 13a8eb1f..6232964e 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -22,9 +22,10 @@
 #include <stdlib.h>
 #include <string.h>
 #include <list>
-#include "../Wifi.h"
+#include "Wifi.h"
 #include "LAN_Socket.h"
-#include "../Config.h"
+#include "Config.h"
+#include "FIFO.h"
 
 #include <slirp/libslirp.h>
 
@@ -46,9 +47,7 @@ const u32 kClientIP = kSubnet | 0x10;
 const u8 kServerMAC[6] = {0x00, 0xAB, 0x33, 0x28, 0x99, 0x44};
 const u8 kDNSMAC[6]    = {0x00, 0xAB, 0x33, 0x28, 0x99, 0x55};
 
-u8 PacketBuffer[2048];
-int PacketLen;
-volatile int RXNum;
+FIFO<u32>* RXBuffer = nullptr;
 
 u32 IPv4ID;
 
@@ -81,6 +80,23 @@ int clock_gettime(int, struct timespec *spec)
 #endif // __WIN32__
 
 
+void RXEnqueue(const void* buf, int len)
+{
+    int alignedlen = (len + 3) & ~3;
+    int totallen = alignedlen + 4;
+
+    if (!RXBuffer->CanFit(totallen >> 2))
+    {
+        printf("slirp: !! NOT ENOUGH SPACE IN RX BUFFER\n");
+        return;
+    }
+
+    u32 header = (alignedlen & 0xFFFF) | (len << 16);
+    RXBuffer->Write(header);
+    for (int i = 0; i < alignedlen; i += 4)
+        RXBuffer->Write(((u32*)buf)[i>>2]);
+}
+
 ssize_t SlirpCbSendPacket(const void* buf, size_t len, void* opaque)
 {
     if (len > 2048)
@@ -91,9 +107,7 @@ ssize_t SlirpCbSendPacket(const void* buf, size_t len, void* opaque)
 
     printf("slirp: response packet of %d bytes, type %04X\n", len, ntohs(((u16*)buf)[6]));
 
-    PacketLen = len;
-    memcpy(PacketBuffer, buf, PacketLen);
-    RXNum = 1;
+    RXEnqueue(buf, len);
 
     return len;
 }
@@ -127,7 +141,7 @@ void SlirpCbRegisterPollFD(int fd, void* opaque)
 {
     printf("Slirp: register poll FD %d\n", fd);
 
-    if (FDListSize >= FDListMax)
+    /*if (FDListSize >= FDListMax)
     {
         printf("!! SLIRP FD LIST FULL\n");
         return;
@@ -139,14 +153,14 @@ void SlirpCbRegisterPollFD(int fd, void* opaque)
     }
 
     FDList[FDListSize].fd = fd;
-    FDListSize++;
+    FDListSize++;*/
 }
 
 void SlirpCbUnregisterPollFD(int fd, void* opaque)
 {
     printf("Slirp: unregister poll FD %d\n", fd);
 
-    if (FDListSize < 1)
+    /*if (FDListSize < 1)
     {
         printf("!! SLIRP FD LIST EMPTY\n");
         return;
@@ -159,7 +173,7 @@ void SlirpCbUnregisterPollFD(int fd, void* opaque)
             FDListSize--;
             FDList[i] = FDList[FDListSize];
         }
-    }
+    }*/
 }
 
 void SlirpCbNotify(void* opaque)
@@ -187,6 +201,8 @@ bool Init()
     FDListSize = 0;
     memset(FDList, 0, sizeof(FDList));
 
+    RXBuffer = new FIFO<u32>(0x8000 >> 2);
+
     SlirpConfig cfg;
     memset(&cfg, 0, sizeof(cfg));
     cfg.version = 1;
@@ -211,6 +227,12 @@ void DeInit()
         slirp_cleanup(Ctx);
         Ctx = nullptr;
     }
+
+    if (RXBuffer)
+    {
+        delete RXBuffer;
+        RXBuffer = nullptr;
+    }
 }
 
 
@@ -379,6 +401,7 @@ void HandleDNSFrame(u8* data, int len)
                        addr_res & 0xFF, (addr_res >> 8) & 0xFF,
                        (addr_res >> 16) & 0xFF, addr_res >> 24);
 
+                break;
                 p = p->ai_next;
             }
         }
@@ -405,13 +428,7 @@ void HandleDNSFrame(u8* data, int len)
     if (framelen & 1) { *out++ = 0; framelen++; }
     FinishUDPFrame(resp, framelen);
 
-    // TODO: if there is already a packet queued, this will overwrite it
-    // that being said, this will only happen during DHCP setup, so probably
-    // not a big deal
-
-    PacketLen = framelen;
-    memcpy(PacketBuffer, resp, PacketLen);
-    RXNum = 1;
+    RXEnqueue(resp, framelen);
 }
 
 int SendPacket(u8* data, int len)
@@ -444,24 +461,20 @@ int SendPacket(u8* data, int len)
     return len;
 }
 
+const int PollListMax = 64;
+struct pollfd PollList[PollListMax];
+int PollListSize;
+
 int SlirpCbAddPoll(int fd, int events, void* opaque)
 {
-    int idx = -1;
-    for (int i = 0; i < FDListSize; i++)
+    if (PollListSize >= PollListMax)
     {
-        if (FDList[i].fd == fd)
-        {
-            idx = i;
-            break;
-        }
-    }
-
-    if (idx == -1)
-    {
-        printf("SLIRP: ERROR! FD %d NOT REGISTERED\n", fd);
+        printf("slirp: POLL LIST FULL\n");
         return -1;
     }
 
+    int idx = PollListSize++;
+
     //printf("Slirp: add poll: fd=%d, idx=%d, events=%08X\n", fd, idx, events);
 
     u16 evt = 0;
@@ -470,26 +483,26 @@ int SlirpCbAddPoll(int fd, int events, void* opaque)
     if (events & SLIRP_POLL_OUT) evt |= POLLWRNORM;
 
 #ifndef __WIN32__
+    // CHECKME
     if (events & SLIRP_POLL_PRI) evt |= POLLPRI;
     if (events & SLIRP_POLL_ERR) evt |= POLLERR;
     if (events & SLIRP_POLL_HUP) evt |= POLLHUP;
 #endif // !__WIN32__
 
-    FDList[idx].events = evt;
+    PollList[idx].fd = fd;
+    PollList[idx].events = evt;
+
     return idx;
 }
 
 int SlirpCbGetREvents(int idx, void* opaque)
 {
-    if (idx < 0 || idx >= FDListSize)
-    {
-        printf("SLIRP: !! BAD FD INDEX %d (MAX %d)\n", idx, FDListSize);
+    if (idx < 0 || idx >= PollListSize)
         return 0;
-    }
 
     //printf("Slirp: get revents, idx=%d, res=%04X\n", idx, FDList[idx].revents);
 
-    u16 evt = FDList[idx].revents;
+    u16 evt = PollList[idx].revents;
     int ret = 0;
 
     if (evt & POLLIN) ret |= SLIRP_POLL_IN;
@@ -507,19 +520,24 @@ int RecvPacket(u8* data)
 
     int ret = 0;
 
-    if (FDListSize > 0)
+    //if (PollListSize > 0)
     {
         u32 timeout = 0;
+        PollListSize = 0;
         slirp_pollfds_fill(Ctx, &timeout, SlirpCbAddPoll, nullptr);
-        int res = poll(FDList, FDListSize, timeout);
+        int res = poll(PollList, PollListSize, timeout);
         slirp_pollfds_poll(Ctx, res<0, SlirpCbGetREvents, nullptr);
     }
 
-    if (RXNum > 0)
+    if (!RXBuffer->IsEmpty())
     {
-        memcpy(data, PacketBuffer, PacketLen);
-        ret = PacketLen;
-        RXNum = 0;
+        u32 header = RXBuffer->Read();
+        u32 len = header & 0xFFFF;
+
+        for (int i = 0; i < len; i += 4)
+            ((u32*)data)[i>>2] = RXBuffer->Read();
+
+        ret = header >> 16;
     }
 
     return ret;

From 7132e11bd4cf9edfe5e15506e649cd655945f291 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 10:29:08 +0200
Subject: [PATCH 13/23] make it work without a hack

---
 src/DSi_NWifi.cpp | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/src/DSi_NWifi.cpp b/src/DSi_NWifi.cpp
index 84b39fa6..73cf4b40 100644
--- a/src/DSi_NWifi.cpp
+++ b/src/DSi_NWifi.cpp
@@ -862,19 +862,13 @@ void DSi_NWifi::WMI_Command()
 
     u8 ep = h0 & 0xFF;
     if (ep > 0x01) // data endpoints
-    {printf("WMI PACKET %04X:%04X:%04X\n", h0, len, h2);
+    {
         WMI_SendPacket(len);
     }
     else
     {
         u16 cmd = MB_Read16(0);
-    printf("WMI CMD: %04X:%04X:%04X %04X\n", h0, len, h2, cmd);
-            for (int i = 0; i < len-2; i++)
-            {
-                printf("%02X ", Mailbox[0]->Peek(i));
-                if ((i&0xF)==0xF) printf("\n");
-            }
-            printf("\n");
+
         switch (cmd)
         {
         case 0x0001: // connect to network
@@ -891,12 +885,13 @@ void DSi_NWifi::WMI_Command()
                 printf("WMI: disconnect\n");
                 ConnectionStatus = 0;
 
-                u8 reply[10];
+                u8 reply[11];
                 *(u16*)&reply[0] = 3; // checkme
                 memcpy(&reply[2], WifiAP::APMac, 6);
                 reply[8] = 3; // disconnect reason (via cmd)
-                reply[9] = 0; // assoc-response length (?????)
-                SendWMIEvent(1, 0x1003, reply, 10);
+                reply[9] = 0; // assoc-response length (none here)
+                reply[10] = 0; // we need atleast one byte here, even if there is no assoc-response
+                SendWMIEvent(1, 0x1003, reply, 11);
             }
             break;
 
@@ -1043,7 +1038,7 @@ void DSi_NWifi::WMI_Command()
                         *(u32*)&reply[4] = cookie;
                         *(u32*)&reply[8] = source;
 
-                        if(ConnectionStatus==1)SendWMIEvent(1, 0x1010, reply, 12);
+                        SendWMIEvent(1, 0x1010, reply, 12);
                     }
                     break;
 

From e43a216ab55f72a6ba1a98046abc3770a4217eb4 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 11:02:42 +0200
Subject: [PATCH 14/23] take care of some minor details

---
 src/SPI.cpp  | 30 +++++++++++++++++-------------
 src/Wifi.cpp |  2 ++
 2 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/src/SPI.cpp b/src/SPI.cpp
index ac407073..eff0a054 100644
--- a/src/SPI.cpp
+++ b/src/SPI.cpp
@@ -162,22 +162,26 @@ void Reset()
 
     UserSettings = userdata;
 
-    // fix touchscreen coords
-    #if 0
-    *(u16*)&Firmware[userdata+0x58] = 0;
-    *(u16*)&Firmware[userdata+0x5A] = 0;
-    Firmware[userdata+0x5C] = 0;
-    Firmware[userdata+0x5D] = 0;
-    *(u16*)&Firmware[userdata+0x5E] = 255<<4;
-    *(u16*)&Firmware[userdata+0x60] = 191<<4;
-    Firmware[userdata+0x62] = 255;
-    Firmware[userdata+0x63] = 191;
+    // TODO evetually: do this in DSi mode
+    if (NDS::ConsoleType == 0)
+    {
+        // fix touchscreen coords
+        *(u16*)&Firmware[userdata+0x58] = 0;
+        *(u16*)&Firmware[userdata+0x5A] = 0;
+        Firmware[userdata+0x5C] = 0;
+        Firmware[userdata+0x5D] = 0;
+        *(u16*)&Firmware[userdata+0x5E] = 255<<4;
+        *(u16*)&Firmware[userdata+0x60] = 191<<4;
+        Firmware[userdata+0x62] = 255;
+        Firmware[userdata+0x63] = 191;
 
-    // disable autoboot
-    //Firmware[userdata+0x64] &= 0xBF;
+        // disable autoboot
+        //Firmware[userdata+0x64] &= 0xBF;
 
-    *(u16*)&Firmware[userdata+0x72] = CRC16(&Firmware[userdata], 0x70, 0xFFFF);
+        *(u16*)&Firmware[userdata+0x72] = CRC16(&Firmware[userdata], 0x70, 0xFFFF);
+    }
 
+#if 0
     // replace MAC address with random address
     // TODO: make optional?
     Firmware[0x36] = 0x00;
diff --git a/src/Wifi.cpp b/src/Wifi.cpp
index ab827244..81881510 100644
--- a/src/Wifi.cpp
+++ b/src/Wifi.cpp
@@ -188,6 +188,8 @@ void Reset()
         IOPORT(0x000) = 0x1440;
     else if (console == 0x20)
         IOPORT(0x000) = 0xC340;
+    else if (NDS::ConsoleType == 1 && console == 0x57)
+        IOPORT(0x000) = 0xC340; // DSi has the modern DS-wifi variant
     else
     {
         printf("wifi: unknown console type %02X\n", console);

From ff69df2a15bdb6cac618a9b19f56ea1732e0f07e Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 12:20:02 +0200
Subject: [PATCH 15/23] add AES-CCM encrypt

makes the eShop work
---
 src/DSi_AES.cpp | 56 ++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 49 insertions(+), 7 deletions(-)

diff --git a/src/DSi_AES.cpp b/src/DSi_AES.cpp
index c7c599e8..dfa67bdc 100644
--- a/src/DSi_AES.cpp
+++ b/src/DSi_AES.cpp
@@ -165,9 +165,37 @@ void ProcessBlock_CCM_Decrypt()
     //printf("AES-CCM: "); _printhex2(data, 16);
 
     Swap16(data_rev, data);
+
     AES_CTR_xcrypt_buffer(&Ctx, data_rev, 16);
+    for (int i = 0; i < 16; i++) CurMAC[i] ^= data_rev[i];
+    AES_ECB_encrypt(&Ctx, CurMAC);
+
+    Swap16(data, data_rev);
+
+    //printf(" -> "); _printhex2(data, 16);
+
+    OutputFIFO->Write(*(u32*)&data[0]);
+    OutputFIFO->Write(*(u32*)&data[4]);
+    OutputFIFO->Write(*(u32*)&data[8]);
+    OutputFIFO->Write(*(u32*)&data[12]);
+}
+
+void ProcessBlock_CCM_Encrypt()
+{
+    u8 data[16];
+    u8 data_rev[16];
+
+    *(u32*)&data[0] = InputFIFO->Read();
+    *(u32*)&data[4] = InputFIFO->Read();
+    *(u32*)&data[8] = InputFIFO->Read();
+    *(u32*)&data[12] = InputFIFO->Read();
+
+    //printf("AES-CCM: "); _printhex2(data, 16);
+
+    Swap16(data_rev, data);
 
     for (int i = 0; i < 16; i++) CurMAC[i] ^= data_rev[i];
+    AES_CTR_xcrypt_buffer(&Ctx, data_rev, 16);
     AES_ECB_encrypt(&Ctx, CurMAC);
 
     Swap16(data, data_rev);
@@ -232,7 +260,6 @@ void WriteCnt(u32 val)
     OutputDMASize = dmasize_out[(val >> 14) & 0x3];
 
     AESMode = (val >> 28) & 0x3;
-    if (AESMode == 1) printf("AES-CCM TODO\n");
 
     if (val & (1<<24))
     {
@@ -245,6 +272,8 @@ void WriteCnt(u32 val)
         // transfer start (checkme)
         RemBlocks = BlkCnt >> 16;
 
+        if (AESMode == 0 && (!(val & (1<<20)))) printf("AES: CCM-DECRYPT MAC FROM WRFIFO, TODO\n");
+
         if (RemBlocks > 0)
         {
             u8 key[16];
@@ -365,14 +394,9 @@ void Update()
         switch (AESMode)
         {
         case 0: ProcessBlock_CCM_Decrypt(); break;
+        case 1: ProcessBlock_CCM_Encrypt(); break;
         case 2:
         case 3: ProcessBlock_CTR(); break;
-        default:
-            // dorp
-            OutputFIFO->Write(InputFIFO->Read());
-            OutputFIFO->Write(InputFIFO->Read());
-            OutputFIFO->Write(InputFIFO->Read());
-            OutputFIFO->Write(InputFIFO->Read());
         }
 
         RemBlocks--;
@@ -398,6 +422,24 @@ void Update()
                 if (CurMAC[15-i] != MAC[i]) Cnt &= ~(1<<21);
             }
         }
+        else if (AESMode == 1)
+        {
+            Ctx.Iv[13] = 0x00;
+            Ctx.Iv[14] = 0x00;
+            Ctx.Iv[15] = 0x00;
+            AES_CTR_xcrypt_buffer(&Ctx, CurMAC, 16);
+
+            u8 finalmac[16];
+            Swap16(finalmac, CurMAC);
+
+            OutputFIFO->Write(*(u32*)&finalmac[0]);
+            OutputFIFO->Write(*(u32*)&finalmac[4]);
+            OutputFIFO->Write(*(u32*)&finalmac[8]);
+            OutputFIFO->Write(*(u32*)&finalmac[12]);
+
+            // CHECKME
+            Cnt &= ~(1<<21);
+        }
         else
         {
             // CHECKME

From c32da212f14266f77767b18cdd75286902bde926 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 15:44:56 +0200
Subject: [PATCH 16/23] make it possible to static-link libslirp

---
 src/frontend/qt_sdl/CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 75dfbe2d..4f9eae0e 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -95,9 +95,9 @@ if (UNIX)
 elseif (WIN32)
 	target_sources(melonDS PUBLIC "${CMAKE_SOURCE_DIR}/melon.rc")
 	
-	target_link_libraries(melonDS comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32 slirp.dll)
+	target_link_libraries(melonDS slirp comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32)
 	if (BUILD_STATIC)
-		target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd)
+		target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd glib-2.0 intl iconv)
 	else()
 		target_link_libraries(melonDS Qt5::Core Qt5::Gui Qt5::Widgets)
 	endif()

From d9e1bf737c23f688871b2f422bc710777dffbd94 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 21 Jun 2020 18:34:53 +0200
Subject: [PATCH 17/23] blarg

---
 src/frontend/qt_sdl/LAN_Socket.cpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/frontend/qt_sdl/LAN_Socket.cpp b/src/frontend/qt_sdl/LAN_Socket.cpp
index 6232964e..458c931d 100644
--- a/src/frontend/qt_sdl/LAN_Socket.cpp
+++ b/src/frontend/qt_sdl/LAN_Socket.cpp
@@ -21,7 +21,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <list>
 #include "Wifi.h"
 #include "LAN_Socket.h"
 #include "Config.h"
@@ -33,6 +32,9 @@
 	#include <ws2tcpip.h>
 #else
 	#include <sys/socket.h>
+	#include <netdb.h>
+	#include <poll.h>
+	#include <time.h>
 #endif
 
 
@@ -45,7 +47,6 @@ const u32 kDNSIP    = kSubnet | 0x02;
 const u32 kClientIP = kSubnet | 0x10;
 
 const u8 kServerMAC[6] = {0x00, 0xAB, 0x33, 0x28, 0x99, 0x44};
-const u8 kDNSMAC[6]    = {0x00, 0xAB, 0x33, 0x28, 0x99, 0x55};
 
 FIFO<u32>* RXBuffer = nullptr;
 
@@ -53,9 +54,9 @@ u32 IPv4ID;
 
 Slirp* Ctx = nullptr;
 
-const int FDListMax = 64;
+/*const int FDListMax = 64;
 struct pollfd FDList[FDListMax];
-int FDListSize;
+int FDListSize;*/
 
 
 #ifdef __WIN32__
@@ -198,8 +199,8 @@ bool Init()
 {
     IPv4ID = 0;
 
-    FDListSize = 0;
-    memset(FDList, 0, sizeof(FDList));
+    //FDListSize = 0;
+    //memset(FDList, 0, sizeof(FDList));
 
     RXBuffer = new FIFO<u32>(0x8000 >> 2);
 

From 8a1964a75cf4cf89d373c7bba5116abc1d48b549 Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 21:43:01 +0200
Subject: [PATCH 18/23] Add libslirp to workflows

---
 .github/workflows/build-ubuntu-aarch64.yml | 2 +-
 .github/workflows/build-ubuntu.yml         | 2 +-
 .github/workflows/build-windows.yml        | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build-ubuntu-aarch64.yml b/.github/workflows/build-ubuntu-aarch64.yml
index 6d0bfde8..c242c57d 100644
--- a/.github/workflows/build-ubuntu-aarch64.yml
+++ b/.github/workflows/build-ubuntu-aarch64.yml
@@ -26,7 +26,7 @@ jobs:
         && sudo rm /etc/apt/sources.list \
         && sudo mv /etc/apt/sources.list{.new,} \
         && sudo apt-get update \
-        && sudo apt-get install {gcc-10,g++-10,pkg-config}-aarch64-linux-gnu libsdl2-dev:arm64 qtbase5-dev:arm64
+        && sudo apt-get install {gcc-10,g++-10,pkg-config}-aarch64-linux-gnu libsdl2-dev:arm64 qtbase5-dev:arm64 libslirp-dev:arm64
     - name: Create build environment
       run: mkdir ${{runner.workspace}}/build
     - name: Configure
diff --git a/.github/workflows/build-ubuntu.yml b/.github/workflows/build-ubuntu.yml
index 4ecdae0a..44834833 100644
--- a/.github/workflows/build-ubuntu.yml
+++ b/.github/workflows/build-ubuntu.yml
@@ -27,7 +27,7 @@ jobs:
         && tar -zxf cmake-$CMAKE_VERSION-Linux-x86_64.tar.gz \
         && sudo rm -f /etc/apt/sources.list.d/dotnetdev.list /etc/apt/sources.list.d/microsoft-prod.list \
         && sudo apt-get update \
-        && sudo apt-get install gtk+-3.0 libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default
+        && sudo apt-get install gtk+-3.0 libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default libslirp-dev
     - name: Create build environment
       run: mkdir ${{runner.workspace}}/build
     - name: Configure
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 035bc546..bbf68af6 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -24,7 +24,7 @@ jobs:
         choco install msys2
         C:\tools\msys64\usr\bin\bash.exe -lc "pacman -Syuq --noconfirm"
     - name: Install dependencies
-      run: C:\tools\msys64\usr\bin\bash.exe -lc "pacman -Sq --noconfirm git make mingw-w64-x86_64-{cmake,mesa,SDL2,qt5-static,toolchain}"
+      run: C:\tools\msys64\usr\bin\bash.exe -lc "pacman -Sq --noconfirm git make mingw-w64-x86_64-{cmake,mesa,SDL2,qt5-static,libslirp,toolchain}"
     - name: Create build environment
       run: |
         New-Item -ItemType directory -Path ${{runner.workspace}}\melonDS\build

From c9b9f43fbf7ff0367d16d81269e38c3b618bfa65 Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 21:48:01 +0200
Subject: [PATCH 19/23] Remove unneeded gtk3 package from the Ubuntu build

---
 .github/workflows/build-ubuntu.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build-ubuntu.yml b/.github/workflows/build-ubuntu.yml
index 44834833..fb3e576f 100644
--- a/.github/workflows/build-ubuntu.yml
+++ b/.github/workflows/build-ubuntu.yml
@@ -27,7 +27,7 @@ jobs:
         && tar -zxf cmake-$CMAKE_VERSION-Linux-x86_64.tar.gz \
         && sudo rm -f /etc/apt/sources.list.d/dotnetdev.list /etc/apt/sources.list.d/microsoft-prod.list \
         && sudo apt-get update \
-        && sudo apt-get install gtk+-3.0 libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default libslirp-dev
+        && sudo apt-get install libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default libslirp-dev
     - name: Create build environment
       run: mkdir ${{runner.workspace}}/build
     - name: Configure

From c547db21e9d41f3a1897ce3ab4872b8aa7f8d31f Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 21:52:35 +0200
Subject: [PATCH 20/23] Don't download CMake, the package is new enough

---
 .github/workflows/build-ubuntu.yml | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/build-ubuntu.yml b/.github/workflows/build-ubuntu.yml
index fb3e576f..5974c69a 100644
--- a/.github/workflows/build-ubuntu.yml
+++ b/.github/workflows/build-ubuntu.yml
@@ -23,17 +23,15 @@ jobs:
       shell: bash
       working-directory: ${{runner.workspace}}
       run: | # Fetch a new version of CMake, because the default is too old.
-        wget -nv https://github.com/Kitware/CMake/releases/download/v$CMAKE_VERSION/cmake-$CMAKE_VERSION-Linux-x86_64.tar.gz \
-        && tar -zxf cmake-$CMAKE_VERSION-Linux-x86_64.tar.gz \
-        && sudo rm -f /etc/apt/sources.list.d/dotnetdev.list /etc/apt/sources.list.d/microsoft-prod.list \
+        sudo rm -f /etc/apt/sources.list.d/dotnetdev.list /etc/apt/sources.list.d/microsoft-prod.list \
         && sudo apt-get update \
-        && sudo apt-get install libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default libslirp-dev
+        && sudo apt-get install cmake libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev qt5-default libslirp-dev
     - name: Create build environment
       run: mkdir ${{runner.workspace}}/build
     - name: Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
-      run: ${{runner.workspace}}/cmake-$CMAKE_VERSION-Linux-x86_64/bin/cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
+      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
     - name: Make
       shell: bash
       working-directory: ${{runner.workspace}}/build

From 173e3b037c4b23b289563491135ad07a69bd365c Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 22:08:57 +0200
Subject: [PATCH 21/23] Link iconv for Windows static builds

---
 src/frontend/qt_sdl/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 74513072..869b905a 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -79,7 +79,7 @@ elseif (WIN32)
 
     target_link_libraries(melonDS comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32)
     if (BUILD_STATIC)
-        target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd)
+        target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd iconv)
     else()
         target_link_libraries(melonDS Qt5::Core Qt5::Gui Qt5::Widgets)
     endif()

From a1f939e0cb4ca834525543e83e58587e928917a1 Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 22:16:53 +0200
Subject: [PATCH 22/23] use FindIconv and link it on all platforms when not
 built in

---
 src/frontend/qt_sdl/CMakeLists.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 869b905a..f1665f52 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -46,6 +46,7 @@ set(CMAKE_AUTORCC ON)
 
 find_package(Threads REQUIRED)
 find_package(PkgConfig REQUIRED)
+find_package(Iconv REQUIRED)
 pkg_check_modules(SDL2 REQUIRED sdl2)
 pkg_check_modules(SLIRP REQUIRED slirp)
 
@@ -70,6 +71,10 @@ else()
 	target_link_libraries(melonDS ${SDL2_LIBRARIES} ${SLIRP_LIBRARIES})
 endif()
 
+if (NOT Iconv_IS_BUILT_IN)
+	target_link_libraries(melonDS ${Iconv_LIBRARIES})
+endif()
+
 if (UNIX)
     option(PORTABLE "Make a portable build that looks for its configuration in the current directory" OFF)
     target_link_libraries(melonDS dl Qt5::Core Qt5::Gui Qt5::Widgets)
@@ -79,7 +84,7 @@ elseif (WIN32)
 
     target_link_libraries(melonDS comctl32 d2d1 dwrite uxtheme ws2_32 iphlpapi gdi32)
     if (BUILD_STATIC)
-        target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd iconv)
+        target_link_libraries(melonDS imm32 winmm version setupapi -static Qt5::Core Qt5::Gui Qt5::Widgets z zstd)
     else()
         target_link_libraries(melonDS Qt5::Core Qt5::Gui Qt5::Widgets)
     endif()

From 6a682a8ef0d1cc3aa35eaa70c4f7a7d106b25b06 Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Sun, 26 Jul 2020 22:26:50 +0200
Subject: [PATCH 23/23] Link iconv instead of ${Iconv_LIBRARIES} because idk
 Windows

---
 src/frontend/qt_sdl/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index f1665f52..05c42d1c 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -72,7 +72,7 @@ else()
 endif()
 
 if (NOT Iconv_IS_BUILT_IN)
-	target_link_libraries(melonDS ${Iconv_LIBRARIES})
+	target_link_libraries(melonDS iconv)
 endif()
 
 if (UNIX)