-int send_ack(conn_list_t *cl)
-{
- unsigned char tmp = ACK;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send ACK to %s", cl->hostname);
-
- syslog(LOG_NOTICE, "Connection with %s activated.", cl->hostname);
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %d:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_termreq(conn_list_t *cl)
-{
- termreq_t tmp;
-
- tmp.type = TERMREQ;
- tmp.vpn_ip = myself->vpn_ip;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send TERMREQ(" IP_ADDR_S ") to " IP_ADDR_S, IP_ADDR_V(tmp.vpn_ip),
- IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_timeout(conn_list_t *cl)
-{
- termreq_t tmp;
-
- tmp.type = PINGTIMEOUT;
- tmp.vpn_ip = myself->vpn_ip;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send TIMEOUT(" IP_ADDR_S ") to " IP_ADDR_S, IP_ADDR_V(tmp.vpn_ip),
- IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_del_host(conn_list_t *cl, conn_list_t *new_host)
-{
- del_host_t tmp;
-
- tmp.type = DEL_HOST;
- tmp.vpn_ip = new_host->vpn_ip;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Sending delete host %lx to " IP_ADDR_S,
- tmp.vpn_ip, IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(del_host_t), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_ping(conn_list_t *cl)
-{
- unsigned char tmp = PING;
-
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, "pinging " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_pong(conn_list_t *cl)
-{
- unsigned char tmp = PONG;
-
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_add_host(conn_list_t *cl, conn_list_t *new_host)
-{
- add_host_t tmp;
-
- tmp.type = ADD_HOST;
- tmp.real_ip = new_host->real_ip;
- tmp.vpn_ip = new_host->vpn_ip;
- tmp.vpn_mask = new_host->vpn_mask;
- tmp.portnr = new_host->port;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Sending add host (%lx/%lx %lx:%hd) to " IP_ADDR_S,
- tmp.vpn_ip, tmp.vpn_mask, tmp.real_ip, tmp.portnr,
- IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(add_host_t), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_key_changed(conn_list_t *cl, conn_list_t *src)
-{
- key_changed_t tmp;
-
- tmp.type = KEY_CHANGED;
- tmp.from = src->vpn_ip;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Sending KEY_CHANGED (%lx) to " IP_ADDR_S,
- tmp.from, IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(key_changed_t), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-void send_key_changed2(void)
-{
- conn_list_t *p;
-
- for(p = conn_list; p != NULL; p = p->next)
- if(p->status.meta && p->protocol_version > PROT_3)
- send_key_changed(p, myself);
-}
-
-int send_basic_info(conn_list_t *cl)
-{
- basic_info_t tmp;
-
- tmp.type = BASIC_INFO;
- tmp.protocol = PROT_CURRENT;
-
- tmp.portnr = myself->port;
- tmp.vpn_ip = myself->vpn_ip;
- tmp.vpn_mask = myself->vpn_mask;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send BASIC_INFO(%d,%hd," IP_ADDR_S "," IP_ADDR_S ") to " IP_ADDR_S,
- tmp.protocol, tmp.portnr, IP_ADDR_V(tmp.vpn_ip), IP_ADDR_V(tmp.vpn_mask),
- IP_ADDR_V(cl->real_ip));
-
- if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_passphrase(conn_list_t *cl)
-{
- passphrase_t tmp;
-
- tmp.type = PASSPHRASE;
- encrypt_passphrase(&tmp);
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send PASSPHRASE(%hd,...) to " IP_ADDR_S, tmp.len,
- IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, &tmp, tmp.len+3, 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_public_key(conn_list_t *cl)
-{
- public_key_t *tmp;
-
- tmp = (public_key_t*)xmalloc(strlen(my_public_key_base36)+sizeof(public_key_t));
- tmp->type = PUBLIC_KEY;
- tmp->len = strlen(my_public_key_base36);
- strcpy(&tmp->key, my_public_key_base36);
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Send PUBLIC_KEY(%hd,%s) to " IP_ADDR_S, tmp->len, &tmp->key,
- IP_ADDR_V(cl->vpn_ip));
-
- if((send(cl->meta_socket, tmp, tmp->len+sizeof(public_key_t), 0)) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_calculate(conn_list_t *cl, char *k)
-{
- calculate_t *tmp;
-
- tmp = xmalloc(strlen(k)+sizeof(calculate_t));
- tmp->type = CALCULATE;
- tmp->len = strlen(k);
- strcpy(&tmp->key, k);
-
- if(send(cl->meta_socket, tmp, tmp->len+4, 0) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- return 0;
-}
-
-int send_key_request(ip_t to)
-{
- key_req_t *tmp;
- conn_list_t *fw;
-
- tmp = xmalloc(sizeof(key_req_t));
- tmp->type = REQ_KEY;
- tmp->to = to;
- tmp->from = myself->vpn_ip;
- tmp->len = 0;
-
- fw = lookup_conn(to);
- if(!fw)
- {
- syslog(LOG_ERR, "Attempting to send key request to " IP_ADDR_S ", which does not exist?",
- IP_ADDR_V(to));
- return -1;
- }
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Sending out request for public key to " IP_ADDR_S,
- IP_ADDR_V(fw->nexthop->vpn_ip));
- if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t), 0) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
- fw->status.waitingforkey = 1;
-
- return 0;
-}
-
-int send_key_answer(conn_list_t *cl, ip_t to)
-{
- key_req_t *tmp;
- conn_list_t *fw;
-
- tmp = xmalloc(sizeof(key_req_t)+strlen(my_public_key_base36));
- tmp->type = ANS_KEY;
- tmp->to = to;
- tmp->from = myself->vpn_ip;
- tmp->expiry = my_key_expiry;
- tmp->len = strlen(my_public_key_base36);
- strcpy(&tmp->key, my_public_key_base36);
-
- fw = lookup_conn(to);
-
- if(!fw)
- {
- syslog(LOG_ERR, "Attempting to send key answer to " IP_ADDR_S ", which does not exist?",
- IP_ADDR_V(to));
- return -1;
- }
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "Sending public key to " IP_ADDR_S,
- IP_ADDR_V(fw->nexthop->vpn_ip));
- if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t)+tmp->len, 0) < 0)
- {
- syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__);
- return -1;
- }
-
- 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;
-
- for(p = conn_list; p != NULL; p = p->next)
- if(p != new && p != source && p->status.meta && p->protocol_version > PROT_3)
- function(p, new);
-
- return 0;
-}
-
-/*
- notify one connection of everything
- i have connected
-*/
-int notify_one(conn_list_t *new)
-{
- conn_list_t *p;
-
- for(p = conn_list; p != NULL; p = p->next)
- if(p != new && p->protocol_version > PROT_3)
- send_add_host(new, p);
-
- return 0;
-}
-
-/*
- The incoming request handlers
-*/
-
-int basic_info_h(conn_list_t *cl, unsigned char *d, int len)
-{
- basic_info_t *tmp = (basic_info_t*)d;
-
- cl->protocol_version = tmp->protocol;
- cl->port = tmp->portnr;
- cl->vpn_ip = tmp->vpn_ip;
- cl->vpn_mask = tmp->vpn_mask;
-
- if(cl->protocol_version < PROT_CURRENT)
- {
- syslog(LOG_ERR, "Peer uses protocol version %d which is too old.",
- cl->protocol_version);
- return -1;
- }
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "got BASIC_INFO(%hd," IP_ADDR_S "," IP_ADDR_S ")", cl->port,
- IP_ADDR_V(cl->vpn_ip), IP_ADDR_V(cl->vpn_mask));
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, "Peer uses protocol version %d",
- cl->protocol_version);
-
- if(cl->status.outgoing)
- {
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_basic_info(cl);
- }
- else
- {
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_passphrase(cl);
- }
-
- cl->status.active = 0;
-
- return 0;
-}
-
-int passphrase_h(conn_list_t *cl, unsigned char *d, int len)
-{
- passphrase_t *tmp = (passphrase_t*)d;
-
- cl->pp = xmalloc(tmp->len+3);
- memcpy(cl->pp, tmp, tmp->len+3);
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "got PASSPHRASE(%hd,...)", cl->pp->len);
-
- if(cl->status.outgoing)
- send_passphrase(cl);
- else
- send_public_key(cl);
-
- return 0;
-}
-
-int public_key_h(conn_list_t *cl, unsigned char *d, int len)
-{
- char *g_n;
- public_key_t *tmp = (public_key_t*)d;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "got PUBLIC_KEY(%hd,%s)", tmp->len, &tmp->key);
-
- g_n = xmalloc(tmp->len+1);
- strcpy(g_n, &tmp->key);
-
- if(verify_passphrase(cl, g_n))
- {
- /* intruder! */
- syslog(LOG_ERR, "Intruder: passphrase does not match.");
- return -1;
- }
-
- if(debug_lvl > 2)
- syslog(LOG_INFO, "Passphrase OK");
-
- if(cl->status.outgoing)
- send_public_key(cl);
- else
- send_ack(cl);
-
- cl->status.active = 1;
- notify_others(cl, NULL, send_add_host);
- notify_one(cl);
-
- return 0;
-}
-
-int ack_h(conn_list_t *cl, unsigned char *d, int len)
-{
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "got ACK");
-
- cl->status.active = 1;
- syslog(LOG_NOTICE, "Connection with %s activated.", cl->hostname);
-
- /*
- Now I'm going to cheat. The meta protocol is actually
- a stream of requests, that may come in in the same TCP
- packet. This is the only place that it will happen,
- though.
- I may change it in the future, if it appears that this
- is not retainable.
- */
- if(len > 1) /* An ADD_HOST follows */
- {
- if(request_handlers[d[1]] == NULL)
- syslog(LOG_ERR, "Unknown request %d.", d[1]);
- if(request_handlers[d[1]](cl, d, len - 1) < 0)
- return -1;
- }
-
- return 0;
-}
-
-int termreq_h(conn_list_t *cl, unsigned char *d, int len)
-{
- syslog(LOG_NOTICE, IP_ADDR_S " wants to quit", IP_ADDR_V(cl->vpn_ip));
- cl->status.termreq = 1;
- terminate_connection(cl);
-
- notify_others(cl, NULL, send_del_host);
-
- return 0;
-}
-
-int timeout_h(conn_list_t *cl, unsigned char *d, int len)
-{
- syslog(LOG_NOTICE, IP_ADDR_S " says it's gotten a timeout from us", IP_ADDR_V(cl->vpn_ip));
- cl->status.termreq = 1;
- terminate_connection(cl);
-
- return 0;
-}
-
-int del_host_h(conn_list_t *cl, unsigned char *d, int len)
-{
- del_host_t *tmp = (del_host_t*)d;
- conn_list_t *fw;
-
- if(debug_lvl > 2)
- syslog(LOG_DEBUG, "got DEL_HOST for " IP_ADDR_S,
- IP_ADDR_V(tmp->vpn_ip));
-
- if(!(fw = lookup_conn(tmp->vpn_ip)))
- {
- syslog(LOG_ERR, "Somebody wanted to delete " IP_ADDR_S " which does not exist?",
- IP_ADDR_V(tmp->vpn_ip));
- return 0;
- }
-
- notify_others(cl, fw, send_del_host);
-
- fw->status.termreq = 1;
- terminate_connection(fw);
-
- return 0;
-}
-
-int ping_h(conn_list_t *cl, unsigned char *d, int len)
-{
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, "responding to ping from " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip));
- cl->status.pinged = 0;
- cl->status.got_pong = 1;
-
- send_pong(cl);
-
- return 0;
-}