ShuriZma
/
melonDS
mirror of https://github.com/melonDS-emu/melonDS.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

start work on DNS

This commit is contained in:
Arisotura 2019-03-05 01:09:23 +01:00
parent 909b29042c
commit a88f0b6792
1 changed files with 64 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

89
src/libui_sdl/LAN_Socket.cpp
View File

@ -225,7 +225,7 @@ void DeInit()
}
}*/
bool HandleDHCPFrame(u8* data, int len)
void HandleDHCPFrame(u8* data, int len)
{
u8 type = 0xFF;
@ -252,7 +252,7 @@ bool HandleDHCPFrame(u8* data, int len)
if (type == 0xFF)
{
printf("DHCP: bad frame\n");
return false;
return;
}
printf("DHCP: frame type %d, transid %08X\n", type, transid);
@ -371,14 +371,55 @@ bool HandleDHCPFrame(u8* data, int len)
PacketLen = framelen;
memcpy(PacketBuffer, resp, PacketLen);
RXNum = 1;
return true;
}
return false;
}
bool HandleIPFrame(u8* data, int len)
void HandleDNSFrame(u8* data, int len)
{
u8* ipheader = &data[0xE];
u8* udpheader = &data[0x22];
u8* dnsbody = &data[0x2A];
u16 id = ntohs(*(u16*)&dnsbody[0]);
u16 flags = ntohs(*(u16*)&dnsbody[2]);
u16 numquestions = ntohs(*(u16*)&dnsbody[4]);
u16 numanswers = ntohs(*(u16*)&dnsbody[6]);
u16 numauth = ntohs(*(u16*)&dnsbody[8]);
u16 numadd = ntohs(*(u16*)&dnsbody[10]);
printf("DNS: ID=%04X, flags=%04X, Q=%d, A=%d, auth=%d, add=%d\n",
id, flags, numquestions, numanswers, numauth, numadd);
u32 curoffset = 12;
for (u16 i = 0; i < numquestions; i++)
{
// Assemble the requested domain name
u8 bitlength = 0;
char domainname[256] = ""; int o = 0;
while ((bitlength = dnsbody[curoffset++]) != 0)
{
if ((o+bitlength) >= 255) break;
strncpy(&domainname[o], (const char *)&dnsbody[curoffset], bitlength);
o += bitlength;
curoffset += bitlength;
if (dnsbody[curoffset] != 0)
{
domainname[o++] = '.';
}
}
printf("- q%d: %s", i, domainname);
// TODO: get answer
printf("\n");
curoffset += 4;
}
}
void HandleIPFrame(u8* data, int len)
{
u8 protocol = data[0x17];
@ -468,7 +509,7 @@ bool HandleIPFrame(u8* data, int len)
if (sockid == -1)
{
printf("LANMAGIC: !! TCP SOCKET LIST FULL\n");
return true;
return;
}
printf("LANMAGIC: opening TCP socket #%d to %d.%d.%d.%d:%d\n",
@ -500,7 +541,7 @@ bool HandleIPFrame(u8* data, int len)
if (sockid == -1)
{
printf("LANMAGIC: bad TCP packet\n");
return true;
return;
}
if (flags & 0x001) // FIN
@ -528,14 +569,12 @@ bool HandleIPFrame(u8* data, int len)
if (tmp == 0) tmp = 0xFFFF;
*(u16*)&protoheader[16] = htons(tmp);
}
return false;
}
bool HandleARPFrame(u8* data, int len)
void HandleARPFrame(u8* data, int len)
{
u16 protocol = ntohs(*(u16*)&data[0x10]);
if (protocol != 0x0800) return false;
if (protocol != 0x0800) return;
u16 op = ntohs(*(u16*)&data[0x14]);
u32 targetip = ntohl(*(u32*)&data[0x26]);
@ -554,7 +593,7 @@ bool HandleARPFrame(u8* data, int len)
const u8* targetmac;
if (targetip == kServerIP) targetmac = kServerMAC;
else if (targetip == kDNSIP) targetmac = kDNSMAC;
else return false;
else return;
u8 resp[64];
u8* out = &resp[0];
@ -583,14 +622,14 @@ bool HandleARPFrame(u8* data, int len)
PacketLen = framelen;
memcpy(PacketBuffer, resp, PacketLen);
RXNum = 1;
return true;
}
return false;
else
{
printf("wat??\n");
}
}
bool HandlePacket(u8* data, int len)
void HandlePacket(u8* data, int len)
{
u16 ethertype = ntohs(*(u16*)&data[0xC]);
@ -606,6 +645,11 @@ bool HandlePacket(u8* data, int len)
printf("LANMAGIC: DHCP packet\n");
return HandleDHCPFrame(data, len);
}
else if (dstport == 53) // DNS
{
printf("LANMAGIC: DNS packet\n");
return HandleDNSFrame(data, len);
}
}
printf("LANMAGIC: IP packet\n");
@ -616,8 +660,6 @@ bool HandlePacket(u8* data, int len)
printf("LANMAGIC: ARP packet\n");
return HandleARPFrame(data, len);
}
return false;
}
int SendPacket(u8* data, int len)
@ -628,10 +670,7 @@ int SendPacket(u8* data, int len)
return 0;
}
// TODO: blarg
if (HandlePacket(data, len))
return len;
HandlePacket(data, len);
return len;
}