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sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using (lwip_)recvfrom with valid "from" and "fromlen" parameters, on a TCP connection caused a crash. Note that using (lwip_)recvfrom like this is a bit slow and that using (lwip)getpeername is the good lwip way to do it (so, using recv is faster on tcp sockets).

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This commit is contained in:
fbernon 2008-03-13 20:03:57 +00:00
parent afcf49ad3a
commit e07d71f5e8
2 changed files with 24 additions and 5 deletions
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7
CHANGELOG
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@ -600,6 +600,13 @@ HISTORY
++ Bug fixes:
2008-03-13 Frédéric Bernon
* sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using
(lwip_)recvfrom with valid "from" and "fromlen" parameters, on a
TCP connection caused a crash. Note that using (lwip_)recvfrom
like this is a bit slow and that using (lwip)getpeername is the
good lwip way to do it (so, using recv is faster on tcp sockets).
2008-03-12 Frédéric Bernon, Jonathan Larmour
* api_msg.c, contrib/apps/ping.c: Fix bug #22530 "api_msg.c's
recv_raw() does not consume data", and the ping sample (with

22
src/api/sockets.c
View File

@ -549,8 +549,13 @@ lwip_recvfrom(int s, void *mem, int len, unsigned int flags,
if (from && fromlen) {
struct sockaddr_in sin;
addr = netbuf_fromaddr(buf);
port = netbuf_fromport(buf);
if (netconn_type(sock->conn) == NETCONN_TCP) {
addr = (struct ip_addr*)&(sin.sin_addr.s_addr);
netconn_getaddr(sock->conn, addr, &port, 0);
} else {
addr = netbuf_fromaddr(buf);
port = netbuf_fromport(buf);
}
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(sin);
@ -568,13 +573,20 @@ lwip_recvfrom(int s, void *mem, int len, unsigned int flags,
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, off));
} else {
#if SOCKETS_DEBUG
addr = netbuf_fromaddr(buf);
port = netbuf_fromport(buf);
struct sockaddr_in sin;
if (netconn_type(sock->conn) == NETCONN_TCP) {
addr = (struct ip_addr*)&(sin.sin_addr.s_addr);
netconn_getaddr(sock->conn, addr, &port, 0);
} else {
addr = netbuf_fromaddr(buf);
port = netbuf_fromport(buf);
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
ip_addr_debug_print(SOCKETS_DEBUG, addr);
LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%u len=%u\n", port, off));
#endif
#endif /* SOCKETS_DEBUG */
}
sock_set_errno(sock, 0);