2 protocol_auth.c -- handle the meta-protocol, authentication
3 Copyright (C) 1999-2005 Ivo Timmermans,
4 2000-2017 Guus Sliepen <guus@tinc-vpn.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include "connection.h"
26 #include "control_common.h"
48 #include "ed25519/sha512.h"
50 ecdsa_t *invitation_key = NULL;
52 static bool send_proxyrequest(connection_t *c) {
58 sockaddr2str(&c->address, &host, &port);
59 send_request(c, "CONNECT %s:%s HTTP/1.1\r\n\r", host, port);
65 if(c->address.sa.sa_family != AF_INET) {
66 logger(DEBUG_ALWAYS, LOG_ERR, "Cannot connect to an IPv6 host through a SOCKS 4 proxy!");
69 char s4req[9 + (proxyuser ? strlen(proxyuser) : 0)];
72 memcpy(s4req + 2, &c->address.in.sin_port, 2);
73 memcpy(s4req + 4, &c->address.in.sin_addr, 4);
75 memcpy(s4req + 8, proxyuser, strlen(proxyuser));
76 s4req[sizeof s4req - 1] = 0;
78 return send_meta(c, s4req, sizeof s4req);
81 int len = 3 + 6 + (c->address.sa.sa_family == AF_INET ? 4 : 16);
84 len += 3 + strlen(proxyuser) + strlen(proxypass);
92 s5req[i++] = strlen(proxyuser);
93 memcpy(s5req + i, proxyuser, strlen(proxyuser));
94 i += strlen(proxyuser);
95 s5req[i++] = strlen(proxypass);
96 memcpy(s5req + i, proxypass, strlen(proxypass));
97 i += strlen(proxypass);
105 if(c->address.sa.sa_family == AF_INET) {
107 memcpy(s5req + i, &c->address.in.sin_addr, 4);
109 memcpy(s5req + i, &c->address.in.sin_port, 2);
112 } else if(c->address.sa.sa_family == AF_INET6) {
114 memcpy(s5req + i, &c->address.in6.sin6_addr, 16);
116 memcpy(s5req + i, &c->address.in6.sin6_port, 2);
120 logger(DEBUG_ALWAYS, LOG_ERR, "Address family %x not supported for SOCKS 5 proxies!", c->address.sa.sa_family);
125 return send_meta(c, s5req, sizeof s5req);
128 logger(DEBUG_ALWAYS, LOG_ERR, "Proxy type not implemented yet");
133 logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type");
138 bool send_id(connection_t *c) {
139 gettimeofday(&c->start, NULL);
144 if(c->outgoing && !read_ecdsa_public_key(c))
147 minor = myself->connection->protocol_minor;
150 if(proxytype && c->outgoing)
151 if(!send_proxyrequest(c))
154 return send_request(c, "%d %s %d.%d", ID, myself->connection->name, myself->connection->protocol_major, minor);
157 static bool finalize_invitation(connection_t *c, const char *data, uint16_t len) {
158 if(strchr(data, '\n')) {
159 logger(DEBUG_ALWAYS, LOG_ERR, "Received invalid key from invited node %s (%s)!\n", c->name, c->hostname);
163 // Create a new host config file
164 char filename[PATH_MAX];
165 snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
166 if(!access(filename, F_OK)) {
167 logger(DEBUG_ALWAYS, LOG_ERR, "Host config file for %s (%s) already exists!\n", c->name, c->hostname);
171 FILE *f = fopen(filename, "w");
173 logger(DEBUG_ALWAYS, LOG_ERR, "Error trying to create %s: %s\n", filename, strerror(errno));
177 fprintf(f, "Ed25519PublicKey = %s\n", data);
180 logger(DEBUG_CONNECTIONS, LOG_INFO, "Key succesfully received from %s (%s)", c->name, c->hostname);
182 // Call invitation-accepted script
184 char *address, *port;
186 environment_init(&env);
187 environment_add(&env, "NODE=%s", c->name);
188 sockaddr2str(&c->address, &address, &port);
189 environment_add(&env, "REMOTEADDRESS=%s", address);
190 environment_add(&env, "NAME=%s", myself->name);
192 execute_script("invitation-accepted", &env);
194 environment_exit(&env);
196 sptps_send_record(&c->sptps, 2, data, 0);
200 static bool receive_invitation_sptps(void *handle, uint8_t type, const void *data, uint16_t len) {
201 connection_t *c = handle;
206 if(type == 1 && c->status.invitation_used)
207 return finalize_invitation(c, data, len);
209 if(type != 0 || len != 18 || c->status.invitation_used)
212 // Recover the filename from the cookie and the key
213 char *fingerprint = ecdsa_get_base64_public_key(invitation_key);
214 char hashbuf[18 + strlen(fingerprint)];
216 memcpy(hashbuf, data, 18);
217 memcpy(hashbuf + 18, fingerprint, sizeof hashbuf - 18);
218 sha512(hashbuf, sizeof hashbuf, cookie);
219 b64encode_urlsafe(cookie, cookie, 18);
222 char filename[PATH_MAX], usedname[PATH_MAX];
223 snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "%s", confbase, cookie);
224 snprintf(usedname, sizeof usedname, "%s" SLASH "invitations" SLASH "%s.used", confbase, cookie);
226 // Atomically rename the invitation file
227 if(rename(filename, usedname)) {
229 logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s tried to use non-existing invitation %s\n", c->hostname, cookie);
231 logger(DEBUG_ALWAYS, LOG_ERR, "Error trying to rename invitation %s\n", cookie);
235 // Open the renamed file
236 FILE *f = fopen(usedname, "r");
238 logger(DEBUG_ALWAYS, LOG_ERR, "Error trying to open invitation %s\n", cookie);
242 // Read the new node's Name from the file
244 fgets(buf, sizeof buf, f);
246 buf[strlen(buf) - 1] = 0;
248 len = strcspn(buf, " \t=");
249 char *name = buf + len;
250 name += strspn(name, " \t");
253 name += strspn(name, " \t");
257 if(!*buf || !*name || strcasecmp(buf, "Name") || !check_id(name)) {
258 logger(DEBUG_ALWAYS, LOG_ERR, "Invalid invitation file %s\n", cookie);
264 c->name = xstrdup(name);
266 // Send the node the contents of the invitation file
269 while((result = fread(buf, 1, sizeof buf, f)))
270 sptps_send_record(&c->sptps, 0, buf, result);
271 sptps_send_record(&c->sptps, 1, buf, 0);
275 c->status.invitation_used = true;
277 logger(DEBUG_CONNECTIONS, LOG_INFO, "Invitation %s succesfully sent to %s (%s)", cookie, c->name, c->hostname);
281 bool id_h(connection_t *c, const char *request) {
282 char name[MAX_STRING_SIZE];
284 if(sscanf(request, "%*d " MAX_STRING " %d.%d", name, &c->protocol_major, &c->protocol_minor) < 2) {
285 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ID", c->name,
290 /* Check if this is a control connection */
292 if(name[0] == '^' && !strcmp(name + 1, controlcookie)) {
293 c->status.control = true;
294 c->allow_request = CONTROL;
295 c->last_ping_time = now.tv_sec + 3600;
298 c->name = xstrdup("<control>");
300 return send_request(c, "%d %d %d", ACK, TINC_CTL_VERSION_CURRENT, getpid());
304 if(!invitation_key) {
305 logger(DEBUG_ALWAYS, LOG_ERR, "Got invitation from %s but we don't have an invitation key", c->hostname);
309 c->ecdsa = ecdsa_set_base64_public_key(name + 1);
311 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad invitation from %s", c->hostname);
315 c->status.invitation = true;
316 char *mykey = ecdsa_get_base64_public_key(invitation_key);
319 if(!send_request(c, "%d %s", ACK, mykey))
323 c->protocol_minor = 2;
325 return sptps_start(&c->sptps, c, false, false, invitation_key, c->ecdsa, "tinc invitation", 15, send_meta_sptps, receive_invitation_sptps);
328 /* Check if identity is a valid name */
330 if(!check_id(name)) {
331 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "ID", c->name,
332 c->hostname, "invalid name");
336 /* If this is an outgoing connection, make sure we are connected to the right host */
339 if(strcmp(c->name, name)) {
340 logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s is %s instead of %s", c->hostname, name,
347 c->name = xstrdup(name);
350 /* Check if version matches */
352 if(c->protocol_major != myself->connection->protocol_major) {
353 logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s (%s) uses incompatible version %d.%d",
354 c->name, c->hostname, c->protocol_major, c->protocol_minor);
358 if(bypass_security) {
360 init_configuration(&c->config_tree);
361 c->allow_request = ACK;
366 c->protocol_minor = 0;
368 if(!c->config_tree) {
369 init_configuration(&c->config_tree);
371 if(!read_host_config(c->config_tree, c->name)) {
372 logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s had unknown identity (%s)", c->hostname, c->name);
377 read_ecdsa_public_key(c);
378 /* Ignore failures if no key known yet */
381 if(c->protocol_minor && !ecdsa_active(c->ecdsa))
382 c->protocol_minor = 1;
384 /* Forbid version rollback for nodes whose Ed25519 key we know */
386 if(ecdsa_active(c->ecdsa) && c->protocol_minor < 1) {
387 logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s (%s) tries to roll back protocol version to %d.%d",
388 c->name, c->hostname, c->protocol_major, c->protocol_minor);
392 c->allow_request = METAKEY;
394 if(c->protocol_minor >= 2) {
395 c->allow_request = ACK;
396 char label[25 + strlen(myself->name) + strlen(c->name)];
399 snprintf(label, sizeof label, "tinc TCP key expansion %s %s", myself->name, c->name);
401 snprintf(label, sizeof label, "tinc TCP key expansion %s %s", c->name, myself->name);
403 return sptps_start(&c->sptps, c, c->outgoing, false, myself->connection->ecdsa, c->ecdsa, label, sizeof label, send_meta_sptps, receive_meta_sptps);
405 return send_metakey(c);
409 bool send_metakey(connection_t *c) {
410 #ifdef DISABLE_LEGACY
413 if(!myself->connection->rsa) {
414 logger(DEBUG_CONNECTIONS, LOG_ERR, "Peer %s (%s) uses legacy protocol which we don't support", c->name, c->hostname);
418 if(!read_rsa_public_key(c))
421 /* We need to use a stream mode for the meta protocol. Use AES for this,
422 but try to match the key size with the one from the cipher selected
426 int keylen = cipher_keylength(myself->incipher);
428 c->outcipher = cipher_open_by_name("aes-128-cfb");
429 else if(keylen <= 24)
430 c->outcipher = cipher_open_by_name("aes-192-cfb");
432 c->outcipher = cipher_open_by_name("aes-256-cfb");
436 c->outbudget = cipher_budget(c->outcipher);
438 if(!(c->outdigest = digest_open_by_name("sha256", -1)))
441 const size_t len = rsa_size(c->rsa);
444 char hexkey[2 * len + 1];
446 /* Create a random key */
450 /* The message we send must be smaller than the modulus of the RSA key.
451 By definition, for a key of k bits, the following formula holds:
453 2^(k-1) <= modulus < 2^(k)
455 Where ^ means "to the power of", not "xor".
456 This means that to be sure, we must choose our message < 2^(k-1).
457 This can be done by setting the most significant bit to zero.
462 if(!cipher_set_key_from_rsa(c->outcipher, key, len, true))
465 if(debug_level >= DEBUG_SCARY_THINGS) {
466 bin2hex(key, hexkey, len);
467 logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Generated random meta key (unencrypted): %s", hexkey);
470 /* Encrypt the random data
472 We do not use one of the PKCS padding schemes here.
473 This is allowed, because we encrypt a totally random string
474 with a length equal to that of the modulus of the RSA key.
477 if(!rsa_public_encrypt(c->rsa, key, len, enckey)) {
478 logger(DEBUG_ALWAYS, LOG_ERR, "Error during encryption of meta key for %s (%s)", c->name, c->hostname);
482 /* Convert the encrypted random data to a hexadecimal formatted string */
484 bin2hex(enckey, hexkey, len);
486 /* Send the meta key */
488 bool result = send_request(c, "%d %d %d %d %d %s", METAKEY,
489 cipher_get_nid(c->outcipher),
490 digest_get_nid(c->outdigest), c->outmaclength,
491 c->outcompression, hexkey);
493 c->status.encryptout = true;
498 bool metakey_h(connection_t *c, const char *request) {
499 #ifdef DISABLE_LEGACY
502 if(!myself->connection->rsa)
505 char hexkey[MAX_STRING_SIZE];
506 int cipher, digest, maclength, compression;
507 const size_t len = rsa_size(myself->connection->rsa);
511 if(sscanf(request, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, hexkey) != 5) {
512 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "METAKEY", c->name, c->hostname);
516 /* Convert the challenge from hexadecimal back to binary */
518 int inlen = hex2bin(hexkey, enckey, sizeof enckey);
520 /* Check if the length of the meta key is all right */
523 logger(DEBUG_ALWAYS, LOG_ERR, "Possible intruder %s (%s): %s", c->name, c->hostname, "wrong keylength");
527 /* Decrypt the meta key */
529 if(!rsa_private_decrypt(myself->connection->rsa, enckey, len, key)) {
530 logger(DEBUG_ALWAYS, LOG_ERR, "Error during decryption of meta key for %s (%s)", c->name, c->hostname);
534 if(debug_level >= DEBUG_SCARY_THINGS) {
535 bin2hex(key, hexkey, len);
536 logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Received random meta key (unencrypted): %s", hexkey);
539 /* Check and lookup cipher and digest algorithms */
542 if(!(c->incipher = cipher_open_by_nid(cipher)) || !cipher_set_key_from_rsa(c->incipher, key, len, false)) {
543 logger(DEBUG_ALWAYS, LOG_ERR, "Error during initialisation of cipher from %s (%s)", c->name, c->hostname);
550 c->inbudget = cipher_budget(c->incipher);
553 if(!(c->indigest = digest_open_by_nid(digest, -1))) {
554 logger(DEBUG_ALWAYS, LOG_ERR, "Error during initialisation of digest from %s (%s)", c->name, c->hostname);
561 c->status.decryptin = true;
563 c->allow_request = CHALLENGE;
565 return send_challenge(c);
569 bool send_challenge(connection_t *c) {
570 #ifdef DISABLE_LEGACY
573 const size_t len = rsa_size(c->rsa);
574 char buffer[len * 2 + 1];
577 c->hischallenge = xrealloc(c->hischallenge, len);
579 /* Copy random data to the buffer */
581 randomize(c->hischallenge, len);
585 bin2hex(c->hischallenge, buffer, len);
587 /* Send the challenge */
589 return send_request(c, "%d %s", CHALLENGE, buffer);
593 bool challenge_h(connection_t *c, const char *request) {
594 #ifdef DISABLE_LEGACY
597 if(!myself->connection->rsa)
600 char buffer[MAX_STRING_SIZE];
601 const size_t len = rsa_size(myself->connection->rsa);
602 size_t digestlen = digest_length(c->indigest);
603 char digest[digestlen];
605 if(sscanf(request, "%*d " MAX_STRING, buffer) != 1) {
606 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "CHALLENGE", c->name, c->hostname);
610 /* Convert the challenge from hexadecimal back to binary */
612 int inlen = hex2bin(buffer, buffer, sizeof buffer);
614 /* Check if the length of the challenge is all right */
617 logger(DEBUG_ALWAYS, LOG_ERR, "Possible intruder %s (%s): %s", c->name, c->hostname, "wrong challenge length");
621 /* Calculate the hash from the challenge we received */
623 if(!digest_create(c->indigest, buffer, len, digest))
626 /* Convert the hash to a hexadecimal formatted string */
628 bin2hex(digest, buffer, digestlen);
632 c->allow_request = CHAL_REPLY;
634 return send_request(c, "%d %s", CHAL_REPLY, buffer);
638 bool chal_reply_h(connection_t *c, const char *request) {
639 #ifdef DISABLE_LEGACY
642 char hishash[MAX_STRING_SIZE];
644 if(sscanf(request, "%*d " MAX_STRING, hishash) != 1) {
645 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "CHAL_REPLY", c->name,
650 /* Convert the hash to binary format */
652 int inlen = hex2bin(hishash, hishash, sizeof hishash);
654 /* Check if the length of the hash is all right */
656 if(inlen != digest_length(c->outdigest)) {
657 logger(DEBUG_ALWAYS, LOG_ERR, "Possible intruder %s (%s): %s", c->name, c->hostname, "wrong challenge reply length");
662 /* Verify the hash */
664 if(!digest_verify(c->outdigest, c->hischallenge, rsa_size(c->rsa), hishash)) {
665 logger(DEBUG_ALWAYS, LOG_ERR, "Possible intruder %s (%s): %s", c->name, c->hostname, "wrong challenge reply");
669 /* Identity has now been positively verified.
670 Send an acknowledgement with the rest of the information needed.
673 free(c->hischallenge);
674 c->hischallenge = NULL;
675 c->allow_request = ACK;
681 static bool send_upgrade(connection_t *c) {
682 #ifdef DISABLE_LEGACY
685 /* Special case when protocol_minor is 1: the other end is Ed25519 capable,
686 * but doesn't know our key yet. So send it now. */
688 char *pubkey = ecdsa_get_base64_public_key(myself->connection->ecdsa);
693 bool result = send_request(c, "%d %s", ACK, pubkey);
699 bool send_ack(connection_t *c) {
700 if(c->protocol_minor == 1)
701 return send_upgrade(c);
703 /* ACK message contains rest of the information the other end needs
704 to create node_t and edge_t structures. */
709 /* Estimate weight */
711 gettimeofday(&now, NULL);
712 c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000;
714 /* Check some options */
716 if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &choice) && choice) || myself->options & OPTION_INDIRECT)
717 c->options |= OPTION_INDIRECT;
719 if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &choice) && choice) || myself->options & OPTION_TCPONLY)
720 c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
722 if(myself->options & OPTION_PMTU_DISCOVERY)
723 c->options |= OPTION_PMTU_DISCOVERY;
725 choice = myself->options & OPTION_CLAMP_MSS;
726 get_config_bool(lookup_config(c->config_tree, "ClampMSS"), &choice);
728 c->options |= OPTION_CLAMP_MSS;
730 if(!get_config_int(lookup_config(c->config_tree, "Weight"), &c->estimated_weight))
731 get_config_int(lookup_config(config_tree, "Weight"), &c->estimated_weight);
733 return send_request(c, "%d %s %d %x", ACK, myport, c->estimated_weight, (c->options & 0xffffff) | (experimental ? (PROT_MINOR << 24) : 0));
736 static void send_everything(connection_t *c) {
737 /* Send all known subnets and edges */
739 if(disablebuggypeers) {
742 char pad[MAXBUFSIZE - MAXSIZE];
745 memset(&zeropkt, 0, sizeof zeropkt);
746 zeropkt.pkt.len = MAXBUFSIZE;
747 send_tcppacket(c, &zeropkt.pkt);
751 for splay_each(subnet_t, s, myself->subnet_tree)
752 send_add_subnet(c, s);
757 for splay_each(node_t, n, node_tree) {
758 for splay_each(subnet_t, s, n->subnet_tree)
759 send_add_subnet(c, s);
761 for splay_each(edge_t, e, n->edge_tree)
766 static bool upgrade_h(connection_t *c, const char *request) {
767 char pubkey[MAX_STRING_SIZE];
769 if(sscanf(request, "%*d " MAX_STRING, pubkey) != 1) {
770 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ACK", c->name, c->hostname);
774 if(ecdsa_active(c->ecdsa) || read_ecdsa_public_key(c)) {
775 char *knownkey = ecdsa_get_base64_public_key(c->ecdsa);
776 bool different = strcmp(knownkey, pubkey);
779 logger(DEBUG_ALWAYS, LOG_ERR, "Already have an Ed25519 public key from %s (%s) which is different from the one presented now!", c->name, c->hostname);
782 logger(DEBUG_ALWAYS, LOG_INFO, "Already have Ed25519 public key from %s (%s), ignoring.", c->name, c->hostname);
783 c->allow_request = TERMREQ;
784 return send_termreq(c);
787 c->ecdsa = ecdsa_set_base64_public_key(pubkey);
789 logger(DEBUG_ALWAYS, LOG_INFO, "Got bad Ed25519 public key from %s (%s), not upgrading.", c->name, c->hostname);
793 logger(DEBUG_ALWAYS, LOG_INFO, "Got Ed25519 public key from %s (%s), upgrading!", c->name, c->hostname);
794 append_config_file(c->name, "Ed25519PublicKey", pubkey);
795 c->allow_request = TERMREQ;
797 c->outgoing->timeout = 0;
798 return send_termreq(c);
801 bool ack_h(connection_t *c, const char *request) {
802 if(c->protocol_minor == 1)
803 return upgrade_h(c, request);
805 char hisport[MAX_STRING_SIZE];
811 if(sscanf(request, "%*d " MAX_STRING " %d %x", hisport, &weight, &options) != 3) {
812 logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ACK", c->name,
817 /* Check if we already have a node_t for him */
819 n = lookup_node(c->name);
823 n->name = xstrdup(c->name);
827 /* Oh dear, we already have a connection to this node. */
828 logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Established a second connection with %s (%s), closing old connection", n->connection->name, n->connection->hostname);
830 if(n->connection->outgoing) {
832 logger(DEBUG_ALWAYS, LOG_WARNING, "Two outgoing connections to the same node!");
834 c->outgoing = n->connection->outgoing;
836 n->connection->outgoing = NULL;
839 terminate_connection(n->connection, false);
840 /* Run graph algorithm to purge key and make sure up/down scripts are rerun with new IP addresses and stuff */
847 if(!(c->options & options & OPTION_PMTU_DISCOVERY)) {
848 c->options &= ~OPTION_PMTU_DISCOVERY;
849 options &= ~OPTION_PMTU_DISCOVERY;
851 c->options |= options;
853 if(get_config_int(lookup_config(c->config_tree, "PMTU"), &mtu) && mtu < n->mtu)
856 if(get_config_int(lookup_config(config_tree, "PMTU"), &mtu) && mtu < n->mtu)
859 if(get_config_bool(lookup_config(c->config_tree, "ClampMSS"), &choice)) {
861 c->options |= OPTION_CLAMP_MSS;
863 c->options &= ~OPTION_CLAMP_MSS;
866 /* Activate this connection */
868 c->allow_request = ALL;
870 logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Connection with %s (%s) activated", c->name,
873 /* Send him everything we know */
877 /* Create an edge_t for this connection */
879 c->edge = new_edge();
880 c->edge->from = myself;
882 sockaddrcpy(&c->edge->address, &c->address);
883 sockaddr_setport(&c->edge->address, hisport);
885 socklen_t local_salen = sizeof local_sa;
886 if (getsockname(c->socket, &local_sa.sa, &local_salen) < 0)
887 logger(DEBUG_ALWAYS, LOG_WARNING, "Could not get local socket address for connection with %s", c->name);
889 sockaddr_setport(&local_sa, myport);
890 c->edge->local_address = local_sa;
892 c->edge->weight = (weight + c->estimated_weight) / 2;
893 c->edge->connection = c;
894 c->edge->options = c->options;
898 /* Notify everyone of the new edge */
901 send_add_edge(c, c->edge);
903 send_add_edge(everyone, c->edge);
905 /* Run MST and SSSP algorithms */