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Send packets back using the same socket as they were received on.

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This commit is contained in:
Guus Sliepen 2012-02-18 11:48:21 +01:00
parent 178e52f76e
commit 6455654d26
2 changed files with 14 additions and 10 deletions
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23
src/net_packet.c
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@ -389,7 +389,6 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
static int priority = 0;
#endif
int origpriority;
int sock;
if(!n->status.reachable) {
ifdebug(TRAFFIC) logger(LOG_INFO, "Trying to send UDP packet to unreachable node %s (%s)", n->name, n->hostname);
@ -476,26 +475,28 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
/* Determine which socket we have to use */
for(sock = 0; sock < listen_sockets; sock++)
if(n->address.sa.sa_family == listen_socket[sock].sa.sa.sa_family)
break;
if(sock >= listen_sockets)
sock = 0; /* If none is available, just use the first and hope for the best. */
if(n->address.sa.sa_family != listen_socket[n->sock].sa.sa.sa_family) {
for(int sock = 0; sock < listen_sockets; sock++) {
if(n->address.sa.sa_family == listen_socket[sock].sa.sa.sa_family) {
n->sock = sock;
break;
}
}
}
/* Send the packet */
#if defined(SOL_IP) && defined(IP_TOS)
if(priorityinheritance && origpriority != priority
&& listen_socket[sock].sa.sa.sa_family == AF_INET) {
&& listen_socket[n->sock].sa.sa.sa_family == AF_INET) {
priority = origpriority;
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Setting outgoing packet priority to %d", priority);
if(setsockopt(listen_socket[sock].udp, SOL_IP, IP_TOS, &priority, sizeof(priority))) /* SO_PRIORITY doesn't seem to work */
if(setsockopt(listen_socket[n->sock].udp, SOL_IP, IP_TOS, &priority, sizeof(priority))) /* SO_PRIORITY doesn't seem to work */
logger(LOG_ERR, "System call `%s' failed: %s", "setsockopt", strerror(errno));
}
#endif
if(sendto(listen_socket[sock].udp, (char *) &inpkt->seqno, inpkt->len, 0, &(n->address.sa), SALEN(n->address.sa)) < 0 && !sockwouldblock(sockerrno)) {
if(sendto(listen_socket[n->sock].udp, (char *) &inpkt->seqno, inpkt->len, 0, &(n->address.sa), SALEN(n->address.sa)) < 0 && !sockwouldblock(sockerrno)) {
if(sockmsgsize(sockerrno)) {
if(n->maxmtu >= origlen)
n->maxmtu = origlen - 1;
@ -635,5 +636,7 @@ void handle_incoming_vpn_data(int sock) {
return;
}
n->sock = sock;
receive_udppacket(n, &pkt);
}

1
src/node.h
View file

@ -40,6 +40,7 @@ typedef struct node_t {
char *name; /* name of this node */
uint32_t options; /* options turned on for this node */
int sock; /* Socket to use for outgoing UDP packets */
sockaddr_t address; /* his real (internet) ip to send UDP packets to */
char *hostname; /* the hostname of its real ip */