- else
- return hostlookup(addr, 1);
- }
-cp
- return hostname;
-}
-
-void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
-{
- vpn_packet_t outpkt;
- int outlen, outpad;
- EVP_CIPHER_CTX ctx;
-cp
- /* Decrypt the packet */
-
- EVP_DecryptInit(&ctx, myself->cipher, myself->key, myself->key + myself->cipher->key_len);
- EVP_DecryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len);
- EVP_DecryptFinal(&ctx, outpkt.salt + outlen, &outpad);
- outlen += outpad;
- outpkt.len = outlen - sizeof(outpkt.salt);
-
- receive_packet(n, &outpkt);
-cp
-}
-
-void receive_tcppacket(connection_t *c, char *buffer, int len)
-{
- vpn_packet_t outpkt;
-cp
- outpkt.len = len;
- memcpy(outpkt.data, buffer, len);
-
- receive_packet(c->node, &outpkt);
-cp
-}
-
-void receive_packet(node_t *n, vpn_packet_t *packet)
-{
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), packet->len, n->name, n->hostname);
-
- route_incoming(n, packet);
-cp
-}
-
-void send_udppacket(node_t *n, vpn_packet_t *inpkt)
-{
- vpn_packet_t outpkt;
- int outlen, outpad;
- EVP_CIPHER_CTX ctx;
- struct sockaddr_in to;
- socklen_t tolen = sizeof(to);
- vpn_packet_t *copy;
-cp
- if(!n->status.validkey)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"),
- n->name, n->hostname);
-
- /* Since packet is on the stack of handle_tap_input(),
- we have to make a copy of it first. */
-
- copy = xmalloc(sizeof(vpn_packet_t));
- memcpy(copy, inpkt, sizeof(vpn_packet_t));
-
- list_insert_tail(n->queue, copy);
-
- if(!n->status.waitingforkey)
- send_req_key(n->nexthop->connection, myself, n);
- return;
- }
-
- /* Encrypt the packet. */
-
- RAND_pseudo_bytes(inpkt->salt, sizeof(inpkt->salt));
-
- EVP_EncryptInit(&ctx, n->cipher, n->key, n->key + n->cipher->key_len);
- EVP_EncryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len + sizeof(inpkt->salt));
- EVP_EncryptFinal(&ctx, outpkt.salt + outlen, &outpad);
- outlen += outpad;
-
- if((sendto(udp_socket, (char *) outpkt.salt, outlen, 0, n->address->ai_addr, n->address->ai_addrlen)) < 0)
- {
- syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"),
- n->name, n->hostname);
- return;
- }
-cp