slirp: replace qemu_set_nonblock()

Replace qemu_set_nonblock() with slirp_set_nonblock()

qemu_set_nonblock() does some event registration with the main
loop. Add a new callback register_poll_fd() for that reason.

Always build the fd-register stub, to avoid #if WIN32.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

net/slirp.c

@@ -186,6 +186,11 @@ static void net_slirp_timer_mod(void *timer, int64_t expire_timer)
     timer_mod(timer, expire_timer);
 }
 
+static void net_slirp_register_poll_fd(int fd)
+{
+    qemu_fd_register(fd);
+}
+
 static const SlirpCb slirp_cb = {
     .output = net_slirp_output,
     .guest_error = net_slirp_guest_error,
@@ -193,6 +198,7 @@ static const SlirpCb slirp_cb = {
     .timer_new = net_slirp_timer_new,
     .timer_free = net_slirp_timer_free,
     .timer_mod = net_slirp_timer_mod,
+    .register_poll_fd = net_slirp_register_poll_fd,
 };
 
 static int net_slirp_init(NetClientState *peer, const char *model,

slirp/libslirp.h

@@ -27,6 +27,8 @@ typedef struct SlirpCb {
     void (*timer_free)(void *timer);
     /* Modify a timer to expire at @expire_time */
     void (*timer_mod)(void *timer, int64_t expire_time);
+    /* Register a fd for future polling */
+    void (*register_poll_fd)(int fd);
 } SlirpCb;
 
 

slirp/misc.c

@@ -163,7 +163,8 @@ fork_exec(struct socket *so, const char *ex)
     slirp_socket_set_fast_reuse(so->s);
     opt = 1;
     slirp_setsockopt(so->s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
-    qemu_set_nonblock(so->s);
+    slirp_set_nonblock(so->s);
+    so->slirp->cb->register_poll_fd(so->s);
     return 1;
 }
 

slirp/tcp_subr.c

@@ -412,7 +412,8 @@ int tcp_fconnect(struct socket *so, unsigned short af)
     int opt, s=so->s;
     struct sockaddr_storage addr;
 
-    qemu_set_nonblock(s);
+    slirp_set_nonblock(s);
+    so->slirp->cb->register_poll_fd(so->s);
     slirp_socket_set_fast_reuse(s);
     opt = 1;
     slirp_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt));
@@ -484,7 +485,8 @@ void tcp_connect(struct socket *inso)
         tcp_close(sototcpcb(so)); /* This will sofree() as well */
         return;
     }
-    qemu_set_nonblock(s);
+    slirp_set_nonblock(s);
+    so->slirp->cb->register_poll_fd(so->s);
     slirp_socket_set_fast_reuse(s);
     opt = 1;
     slirp_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));

slirp/util.c

@@ -43,6 +43,20 @@ int inet_aton(const char *cp, struct in_addr *ia)
 }
 #endif
 
+void slirp_set_nonblock(int fd)
+{
+#ifndef _WIN32
+    int f;
+    f = fcntl(fd, F_GETFL);
+    assert(f != -1);
+    f = fcntl(fd, F_SETFL, f | O_NONBLOCK);
+    assert(f != -1);
+#else
+    unsigned long opt = 1;
+    ioctlsocket(fd, FIONBIO, &opt);
+#endif
+}
+
 static void slirp_set_cloexec(int fd)
 {
 #ifndef _WIN32

slirp/util.h

@@ -68,6 +68,7 @@ int inet_aton(const char *cp, struct in_addr *ia);
 #endif
 
 int slirp_socket(int domain, int type, int protocol);
+void slirp_set_nonblock(int fd);
 
 static inline int slirp_socket_set_nodelay(int fd)
 {

stubs/Makefile.objs

@@ -33,7 +33,7 @@ stub-obj-y += trace-control.o
 stub-obj-y += uuid.o
 stub-obj-y += vm-stop.o
 stub-obj-y += vmstate.o
-stub-obj-$(CONFIG_WIN32) += fd-register.o
+stub-obj-y += fd-register.o
 stub-obj-y += qmp_memory_device.o
 stub-obj-y += target-monitor-defs.o
 stub-obj-y += target-get-monitor-def.o