- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-int send_key_changed(conn_list_t *cl, conn_list_t *src)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending KEY_CHANGED origin %s to %s (%s)"),
- src->vpn_hostname, cl->vpn_hostname, cl->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", KEY_CHANGED, src->vpn_ip);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-void send_key_changed_all(void)
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p->status.meta && p->status.active)
- send_key_changed(p, myself);
-cp
-}
-
-int send_basic_info(conn_list_t *cl)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending BASIC_INFO to %s"),
- cl->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %d %lx/%lx:%x %d\n", BASIC_INFO, PROT_CURRENT, myself->vpn_ip, myself->vpn_mask, myself->port, myself->flags);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-int send_passphrase(conn_list_t *cl)
-{
- passphrase_t tmp;
-cp
- encrypt_passphrase(&tmp);
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PASSPHRASE to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PASSPHRASE, tmp.phrase);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-int send_public_key(conn_list_t *cl)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PUBLIC_KEY to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PUBLIC_KEY, my_public_key_base36);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-/* WDN doet deze functie? (GS)
-int send_calculate(conn_list_t *cl, char *k)
-{
-cp
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", CALCULATE, k);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-*/
-
-int send_key_request(ip_t to)
-{
- conn_list_t *fw;
-cp
- fw = lookup_conn(to);
- if(!fw)
- {
- syslog(LOG_ERR, _("Attempting to send REQ_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending REQ_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx\n", REQ_KEY, to, myself->vpn_ip);
-
- if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
- fw->status.waitingforkey = 1;
-cp
- return 0;
-}
-
-int send_key_answer(conn_list_t *cl, ip_t to)
-{
- conn_list_t *fw;
-cp
-
- fw = lookup_conn(to);
-
- if(!fw)
- {
- syslog(LOG_ERR, _("Attempting to send ANS_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending ANS_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
-
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx %d %s\n", ANS_KEY, to, myself->vpn_ip, my_key_expiry, my_public_key_base36);
-
- if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
-cp
- return 0;
-}
-
-/*
- notify all my direct connections of a new host
- that was added to the vpn, with the exception
- of the source of the announcement.
-*/
-int notify_others(conn_list_t *new, conn_list_t *source,
- int (*function)(conn_list_t*, conn_list_t*))
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p != new && p != source && p->status.meta && p->status.active)
- function(p, new);
-cp
- return 0;
-}
-
-/*
- notify one connection of everything
- i have connected
-*/
-int notify_one(conn_list_t *new)
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p != new && p->status.active)
- send_add_host(new, p);
-cp
- return 0;
-}
-
-/*
- The incoming request handlers
-*/
-
-int basic_info_h(conn_list_t *cl)
-{
- conn_list_t *old;
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got BASIC_INFO from %s"), cl->real_hostname);
-
- if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx %d", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port, &cl->flags) != 5)
- {
- syslog(LOG_ERR, _("Got bad BASIC_INFO from %s"),
- cl->real_hostname);
- return -1;
- }
-
- cl->vpn_hostname = hostlookup(htonl(cl->vpn_ip));
-
- if(cl->protocol_version != PROT_CURRENT)
- {
- syslog(LOG_ERR, _("Peer uses incompatible protocol version %d"),
- cl->protocol_version);
- return -1;
- }
-
- if(cl->status.outgoing)
- {
- /* First check if the host we connected to is already in our
- connection list. If so, we are probably making a loop, which
- is not desirable.
- */
-
- if(old=lookup_conn(cl->vpn_ip))
- {
- if(debug_lvl>0)
- syslog(LOG_NOTICE, _("Uplink %s (%s) is already in our connection list"),
- cl->vpn_hostname, cl->real_hostname);
- cl->status.outgoing = 0;
- old->status.outgoing = 1;
- terminate_connection(cl);
- return 0;
- }
-
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_basic_info(cl);
- }
- else
- {
-
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_passphrase(cl);
- }
-cp
- return 0;
-}
-
-int passphrase_h(conn_list_t *cl)
-{
-cp
- cl->pp = xmalloc(sizeof(*(cl->pp)));
-
- if(sscanf(cl->buffer, "%*d %as", &(cl->pp->phrase)) != 1)
- {
- syslog(LOG_ERR, _("Got bad PASSPHRASE from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
- cl->pp->len = strlen(cl->pp->phrase);
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PASSPHRASE from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- if(cl->status.outgoing)
- send_passphrase(cl);
- else
- send_public_key(cl);
-cp
- return 0;
-}
-
-int public_key_h(conn_list_t *cl)
-{
- char *g_n;
- conn_list_t *old;
-cp
- if(sscanf(cl->buffer, "%*d %as", &g_n) != 1)
- {
- syslog(LOG_ERR, _("Got bad PUBLIC_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PUBLIC_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- if(verify_passphrase(cl, g_n))
- {
- /* intruder! */
- syslog(LOG_ERR, _("Intruder from %s: passphrase for %s does not match!"),
- cl->real_hostname, cl->vpn_hostname);
- return -1;
- }
-
- if(cl->status.outgoing)
- send_public_key(cl);
- else
- {
- send_ack(cl);
-
- /* Okay, before we active the connection, we check if there is another entry
- in the connection list with the same vpn_ip. If so, it presumably is an
- old connection that has timed out but we don't know it yet.
- */
-
- while(old = lookup_conn(cl->vpn_ip))
- {
- if(debug_lvl > 1)
- syslog(LOG_NOTICE, _("Removing old entry for %s at %s in favour of new connection from %s"),
- cl->vpn_hostname, old->real_hostname, cl->real_hostname);
- old->status.active = 0;
- terminate_connection(old);
- }
-
- cl->status.active = 1;
-
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
- cl->vpn_hostname, cl->real_hostname);
-
- notify_others(cl, NULL, send_add_host);
- notify_one(cl);
- }
-cp
- return 0;
-}
-
-int ack_h(conn_list_t *cl)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got ACK from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- cl->status.active = 1;
-
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
- cl->vpn_hostname, cl->real_hostname);
-
- notify_others(cl, NULL, send_add_host);
- notify_one(cl);
-
- upstreamindex = 0;
-cp
- return 0;
-}
-
-int termreq_h(conn_list_t *cl)
-{
-cp
- if(!cl->status.active)
- {
- syslog(LOG_ERR, _("Got unauthorized TERMREQ from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got TERMREQ from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- cl->status.termreq = 1;
-
- terminate_connection(cl);
-cp
- return 0;
-}
-
-int timeout_h(conn_list_t *cl)
-{
-cp
- if(!cl->status.active)
- {
- syslog(LOG_ERR, _("Got unauthorized TIMEOUT from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got TIMEOUT from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- cl->status.termreq = 1;
- terminate_connection(cl);
-cp
- return 0;
-}
-
-int del_host_h(conn_list_t *cl)
-{
- ip_t vpn_ip;
- conn_list_t *fw;
-cp
- if(!cl->status.active)
- {
- syslog(LOG_ERR, _("Got unauthorized DEL_HOST from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(sscanf(cl->buffer, "%*d %lx", &vpn_ip) != 1)
- {
- syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(!(fw = lookup_conn(vpn_ip)))
- {
- syslog(LOG_ERR, _("Got DEL_HOST for %d.%d.%d.%d from %s (%s) which does not exist?"),
- IP_ADDR_V(vpn_ip), cl->vpn_hostname, cl->real_hostname);
- return 0;
- }
-
- /* Connections lists are really messed up if this happens */
- if(vpn_ip == myself->vpn_ip)
- {
- syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"),
- cl->vpn_hostname, cl->real_hostname);
- sighup = 1;
- return 0;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got DEL_HOST for %s (%s) from %s (%s)"),
- fw->vpn_hostname, fw->real_hostname, cl->vpn_hostname, cl->real_hostname);
-
- notify_others(fw, cl, send_del_host);
-
- fw->status.termreq = 1;
- fw->status.active = 0;
-
- terminate_connection(fw);
-cp
- return 0;
-}
-
-int tcppacket_h(conn_list_t *cl)
-{
- char packet[1600];
- int len;
-cp
- if(!cl->status.active)
- {
- syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(sscanf(cl->buffer, "%*d %d", &len) != 1)
- {
- syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(len>1600)
- {
- syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
-
- /* Evil kludge comming up */
- if(read(cl->meta_socket,packet,len)!=len)
- {
- syslog(LOG_ERR, _("Error while receiving PACKET data from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
-
- xrecv(cl,packet);
-cp
- return 0;
-}
-
-
-int ping_h(conn_list_t *cl)
-{
-cp
- if(!cl->status.active)
- {
- syslog(LOG_ERR, _("Got unauthorized PING from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }