/*
net_packet.c -- Handles in- and outgoing VPN packets
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2014 Guus Sliepen <guus@tinc-vpn.org>
2010 Timothy Redaelli <timothy@redaelli.eu>
2010 Brandon Black <blblack@gmail.com>
HMAC(n->indigest, n->inkey, n->inkeylength, (unsigned char *) &inpkt->seqno, inpkt->len - n->inmaclength, (unsigned char *)hmac, NULL);
- return !memcmp(hmac, (char *) &inpkt->seqno + inpkt->len - n->inmaclength, n->inmaclength);
+ return !memcmp_constant_time(hmac, (char *) &inpkt->seqno + inpkt->len - n->inmaclength, n->inmaclength);
}
static void receive_udppacket(node_t *n, vpn_packet_t *inpkt) {
HMAC(n->indigest, n->inkey, n->inkeylength,
(unsigned char *) &inpkt->seqno, inpkt->len, (unsigned char *)hmac, NULL);
- if(memcmp(hmac, (char *) &inpkt->seqno + inpkt->len, n->inmaclength)) {
+ if(memcmp_constant_time(hmac, (char *) &inpkt->seqno + inpkt->len, n->inmaclength)) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Got unauthenticated packet from %s (%s)",
n->name, n->hostname);
return;
for(node = node_udp_tree->head; node; node = node->next) {
n = node->data;
- if(n->status.reachable && ((n->via == myself && n->nexthop == n) || n->via == n))
+ if(n->status.reachable && n != myself && ((n->via == myself && n->nexthop == n) || n->via == n))
send_packet(n, packet);
}
break;
avl_node_t *node;
edge_t *e;
node_t *n = NULL;
- bool hard = false;
static time_t last_hard_try = 0;
for(node = edge_weight_tree->head; node; node = node->next) {
if(e->to == myself)
continue;
- if(sockaddrcmp_noport(from, &e->address)) {
- if(last_hard_try == now)
- continue;
- hard = true;
- }
+ if(last_hard_try == now && sockaddrcmp_noport(from, &e->address))
+ continue;
if(!try_mac(e->to, pkt))
continue;
break;
}
- if(hard)
- last_hard_try = now;
-
last_hard_try = now;
return n;
}