/*
protocol.c -- handle the meta-protocol
- Copyright (C) 1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1999-2001 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: protocol.c,v 1.28.4.23 2000/08/08 13:47:57 guus Exp $
+ $Id: protocol.c,v 1.28.4.116 2001/10/31 20:02:06 guus Exp $
*/
#include "config.h"
#include <sys/socket.h>
#include <unistd.h>
#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
#include <utils.h>
#include <xalloc.h>
+#include <avl_tree.h>
+#include <list.h>
#include <netinet/in.h>
+#include <openssl/sha.h>
+#include <openssl/rand.h>
+#include <openssl/evp.h>
+
+#ifndef HAVE_RAND_PSEUDO_BYTES
+#define RAND_pseudo_bytes RAND_bytes
+#endif
+
#include "conf.h"
-#include "encr.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
+#include "meta.h"
+#include "connection.h"
+#include "node.h"
+#include "edge.h"
+#include "graph.h"
#include "system.h"
-char buffer[MAXBUFSIZE+1];
-int buflen;
+int mykeyused = 0;
-/* Outgoing request routines */
-
-int send_ack(conn_list_t *cl)
+int check_id(char *id)
{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending ACK to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ int i;
- buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", ACK);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %d:%d: %m"), __FILE__, __LINE__);
+ for (i = 0; i < strlen(id); i++)
+ if(!isalnum(id[i]) && id[i] != '_')
return -1;
- }
-cp
+
return 0;
}
-int send_termreq(conn_list_t *cl)
+/* Generic request routines - takes care of logging and error
+ detection as well */
+
+int send_request(connection_t *c, const char *format, ...)
{
+ va_list args;
+ char buffer[MAXBUFSIZE];
+ int len, request;
+
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending TERMREQ to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ /* Use vsnprintf instead of vasprintf: faster, no memory
+ fragmentation, cleanup is automatic, and there is a limit on the
+ input buffer anyway */
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", TERMREQ, myself->vpn_ip);
+ va_start(args, format);
+ len = vsnprintf(buffer, MAXBUFSIZE, format, args);
+ request = va_arg(args, int);
+ va_end(args);
- if(write(cl->meta_socket, buffer, buflen) < 0)
+ if(len < 0 || len > MAXBUFSIZE-1)
{
- if(debug_lvl > 1)
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Output buffer overflow while sending %s to %s (%s)"), request_name[request], c->name, c->hostname);
return -1;
}
+
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ {
+ if(debug_lvl >= DEBUG_META)
+ syslog(LOG_DEBUG, _("Sending %s to %s (%s): %s"), request_name[request], c->name, c->hostname, buffer);
+ else
+ syslog(LOG_DEBUG, _("Sending %s to %s (%s)"), request_name[request], c->name, c->hostname);
+ }
+
+ buffer[len++] = '\n';
cp
- return 0;
+ return send_meta(c, buffer, len);
}
-int send_timeout(conn_list_t *cl)
+int receive_request(connection_t *c)
{
+ int request;
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending TIMEOUT to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ if(sscanf(c->buffer, "%d", &request) == 1)
+ {
+ if((request < 0) || (request >= LAST) || (request_handlers[request] == NULL))
+ {
+ if(debug_lvl >= DEBUG_META)
+ syslog(LOG_DEBUG, _("Unknown request from %s (%s): %s"),
+ c->name, c->hostname, c->buffer);
+ else
+ syslog(LOG_ERR, _("Unknown request from %s (%s)"),
+ c->name, c->hostname);
+
+ return -1;
+ }
+ else
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ {
+ if(debug_lvl >= DEBUG_META)
+ syslog(LOG_DEBUG, _("Got %s from %s (%s): %s"),
+ request_name[request], c->name, c->hostname, c->buffer);
+ else
+ syslog(LOG_DEBUG, _("Got %s from %s (%s)"),
+ request_name[request], c->name, c->hostname);
+ }
+ }
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", PINGTIMEOUT, myself->vpn_ip);
+ if((c->allow_request != ALL) && (c->allow_request != request))
+ {
+ syslog(LOG_ERR, _("Unauthorized request from %s (%s)"), c->name, c->hostname);
+ return -1;
+ }
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(request_handlers[request](c))
+ /* Something went wrong. Probably scriptkiddies. Terminate. */
+ {
+ syslog(LOG_ERR, _("Error while processing %s from %s (%s)"),
+ request_name[request], c->name, c->hostname);
+ return -1;
+ }
+ }
+ else
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Bogus data received from %s (%s)"),
+ c->name, c->hostname);
return -1;
}
cp
return 0;
}
-int send_del_host(conn_list_t *cl, conn_list_t *new_host)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending DEL_HOST for %s (%s) to %s (%s)"),
- new_host->vpn_hostname, new_host->real_hostname, cl->vpn_hostname, cl->real_hostname);
+/* The authentication protocol is described in detail in doc/SECURITY2,
+ the rest will be described in doc/PROTOCOL. */
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", DEL_HOST, new_host->vpn_ip);
-
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
+int send_id(connection_t *c)
+{
cp
- return 0;
+ return send_request(c, "%d %s %d", ID, myself->connection->name, myself->connection->protocol_version);
}
-/* Evil hack - TCP tunneling is bad */
-int send_tcppacket(conn_list_t *cl, void *data, int len)
+int id_h(connection_t *c)
{
+ char name[MAX_STRING_SIZE];
+int bla;
cp
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ if(sscanf(c->buffer, "%*d "MAX_STRING" %d", name, &c->protocol_version) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ID", c->name, c->hostname);
+ return -1;
+ }
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
+ /* Check if identity is a valid name */
- if((write(cl->meta_socket, buffer, buflen)) != buflen)
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ID", c->name, c->hostname, "invalid name");
return -1;
}
- if((write(cl->meta_socket, data, len)) != len)
+ /* If we set c->name in advance, make sure we are connected to the right host */
+
+ if(c->name)
+ {
+ if(strcmp(c->name, name))
+ {
+ syslog(LOG_ERR, _("Peer %s is %s instead of %s"), c->hostname, name, c->name);
+ return -1;
+ }
+ }
+ else
+ c->name = xstrdup(name);
+
+ /* Check if version matches */
+
+ if(c->protocol_version != myself->connection->protocol_version)
{
- syslog(LOG_ERR, _("Sending PACKET data failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Peer %s (%s) uses incompatible version %d"),
+ c->name, c->hostname, c->protocol_version);
return -1;
}
-cp
- return 0;
-}
+ if(bypass_security)
+ {
+ if(!c->config_tree)
+ init_configuration(&c->config_tree);
+ c->allow_request = ACK;
+ return send_ack(c);
+ }
-int send_ping(conn_list_t *cl)
-{
-cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PING to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ if(!c->config_tree)
+ {
+ init_configuration(&c->config_tree);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", PING);
+ if((bla = read_connection_config(c)))
+ {
+ syslog(LOG_ERR, _("Peer %s had unknown identity (%s)"), c->hostname, c->name);
+ return -1;
+ }
+ }
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(read_rsa_public_key(c))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
return -1;
}
+
+ c->allow_request = METAKEY;
cp
- return 0;
+ return send_metakey(c);
}
-int send_pong(conn_list_t *cl)
+int send_metakey(connection_t *c)
{
+ char *buffer;
+ int len, x;
+cp
+ len = RSA_size(c->rsa_key);
+
+ /* Allocate buffers for the meta key */
+
+ buffer = xmalloc(len*2+1);
+
+ if(!c->outkey)
+ c->outkey = xmalloc(len);
+
+ if(!c->outctx)
+ c->outctx = xmalloc(sizeof(*c->outctx));
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PONG to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ /* Copy random data to the buffer */
+
+ RAND_bytes(c->outkey, len);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d\n", PONG);
+ /* The message we send must be smaller than the modulus of the RSA key.
+ By definition, for a key of k bits, the following formula holds:
+
+ 2^(k-1) <= modulus < 2^(k)
+
+ Where ^ means "to the power of", not "xor".
+ This means that to be sure, we must choose our message < 2^(k-1).
+ This can be done by setting the most significant bit to zero.
+ */
+
+ c->outkey[0] &= 0x7F;
+
+ if(debug_lvl >= DEBUG_SCARY_THINGS)
+ {
+ bin2hex(c->outkey, buffer, len);
+ buffer[len*2] = '\0';
+ syslog(LOG_DEBUG, _("Generated random meta key (unencrypted): %s"), buffer);
+ }
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ /* Encrypt the random data
+
+ We do not use one of the PKCS padding schemes here.
+ This is allowed, because we encrypt a totally random string
+ with a length equal to that of the modulus of the RSA key.
+ */
+
+ if(RSA_public_encrypt(len, c->outkey, buffer, c->rsa_key, RSA_NO_PADDING) != len)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
+ free(buffer);
return -1;
}
cp
- return 0;
+ /* Convert the encrypted random data to a hexadecimal formatted string */
+
+ bin2hex(buffer, buffer, len);
+ buffer[len*2] = '\0';
+
+ /* Send the meta key */
+
+ x = send_request(c, "%d %s", METAKEY, buffer);
+ free(buffer);
+
+ /* Further outgoing requests are encrypted with the key we just generated */
+
+ EVP_EncryptInit(c->outctx, EVP_bf_cfb(),
+ c->outkey + len - EVP_bf_cfb()->key_len,
+ c->outkey + len - EVP_bf_cfb()->key_len - EVP_bf_cfb()->iv_len);
+
+ c->status.encryptout = 1;
+cp
+ return x;
}
-int send_add_host(conn_list_t *cl, conn_list_t *new_host)
+int metakey_h(connection_t *c)
{
- ip_t real_ip;
- int flags;
- char *hostname;
+ char buffer[MAX_STRING_SIZE];
+ int len;
cp
- real_ip = new_host->real_ip;
- hostname = new_host->real_hostname;
- flags = new_host->flags;
-
- /* If we need to propagate information about a new host that wants us to export
- * it's indirectdata flag, we set the INDIRECTDATA flag and unset the EXPORT...
- * flag, and set it's real_ip to our vpn_ip, so that net.c send_packet() will
- * work correctly.
- */
-
- if(flags & EXPORTINDIRECTDATA)
+ if(sscanf(c->buffer, "%*d "MAX_STRING, buffer) != 1)
{
- flags &= ~EXPORTINDIRECTDATA;
- flags |= INDIRECTDATA;
- real_ip = myself->vpn_ip;
- hostname = myself->real_hostname;
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name, c->hostname);
+ return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending ADD_HOST for %s (%s) to %s (%s)"),
- new_host->vpn_hostname, hostname, cl->vpn_hostname, cl->real_hostname);
+ len = RSA_size(myself->connection->rsa_key);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx/%lx:%x %d\n", ADD_HOST, real_ip, new_host->vpn_ip, new_host->vpn_mask, new_host->port, flags);
+ /* Check if the length of the meta key is all right */
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ if(strlen(buffer) != len*2)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong keylength");
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);
+ /* Allocate buffers for the meta key */
+
+ if(!c->inkey)
+ c->inkey = xmalloc(len);
+
+ if(!c->inctx)
+ c->inctx = xmalloc(sizeof(*c->inctx));
+
+ /* Convert the challenge from hexadecimal back to binary */
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx\n", KEY_CHANGED, src->vpn_ip);
+ hex2bin(buffer,buffer,len);
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ /* Decrypt the meta key */
+
+ if(RSA_private_decrypt(len, buffer, c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) /* See challenge() */
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
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);
+ if(debug_lvl >= DEBUG_SCARY_THINGS)
+ {
+ bin2hex(c->inkey, buffer, len);
+ buffer[len*2] = '\0';
+ syslog(LOG_DEBUG, _("Received random meta key (unencrypted): %s"), buffer);
+ }
+
+ /* All incoming requests will now be encrypted. */
+
+ EVP_DecryptInit(c->inctx, EVP_bf_cfb(),
+ c->inkey + len - EVP_bf_cfb()->key_len,
+ c->inkey + len - EVP_bf_cfb()->key_len - EVP_bf_cfb()->iv_len);
+
+ c->status.decryptin = 1;
+
+ c->allow_request = CHALLENGE;
cp
+ return send_challenge(c);
}
-int send_basic_info(conn_list_t *cl)
+int send_challenge(connection_t *c)
{
+ char *buffer;
+ int len, x;
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending BASIC_INFO to %s"),
- cl->real_hostname);
+ /* CHECKME: what is most reasonable value for len? */
- 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);
+ len = RSA_size(c->rsa_key);
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
+ /* Allocate buffers for the challenge */
+
+ buffer = xmalloc(len*2+1);
+
+ if(c->hischallenge)
+ free(c->hischallenge);
+
+ c->hischallenge = xmalloc(len);
cp
- return 0;
-}
+ /* Copy random data to the buffer */
+
+ RAND_bytes(c->hischallenge, len);
-int send_passphrase(conn_list_t *cl)
-{
- passphrase_t tmp;
cp
- encrypt_passphrase(&tmp);
+ /* Convert to hex */
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PASSPHRASE to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ bin2hex(c->hischallenge, buffer, len);
+ buffer[len*2] = '\0';
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PASSPHRASE, tmp.phrase);
+cp
+ /* Send the challenge */
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
+ x = send_request(c, "%d %s", CHALLENGE, buffer);
+ free(buffer);
cp
- return 0;
+ return x;
}
-int send_public_key(conn_list_t *cl)
+int challenge_h(connection_t *c)
{
+ char buffer[MAX_STRING_SIZE];
+ int len;
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending PUBLIC_KEY to %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ if(sscanf(c->buffer, "%*d "MAX_STRING, buffer) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "CHALLENGE", c->name, c->hostname);
+ return -1;
+ }
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PUBLIC_KEY, my_public_key_base36);
+ len = RSA_size(myself->connection->rsa_key);
- if((write(cl->meta_socket, buffer, buflen)) < 0)
+ /* Check if the length of the challenge is all right */
+
+ if(strlen(buffer) != len*2)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong challenge length");
return -1;
}
+
+ /* Allocate buffers for the challenge */
+
+ if(!c->mychallenge)
+ c->mychallenge = xmalloc(len);
+
+ /* Convert the challenge from hexadecimal back to binary */
+
+ hex2bin(buffer,c->mychallenge,len);
+
+ c->allow_request = CHAL_REPLY;
+
+ /* Rest is done by send_chal_reply() */
cp
- return 0;
+ return send_chal_reply(c);
}
-/* WDN doet deze functie? (GS)
-int send_calculate(conn_list_t *cl, char *k)
+int send_chal_reply(connection_t *c)
{
+ char hash[SHA_DIGEST_LENGTH*2+1];
cp
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", CALCULATE, k);
+ /* Calculate the hash from the challenge we received */
+
+ SHA1(c->mychallenge, RSA_size(myself->connection->rsa_key), hash);
+
+ /* Convert the hash to a hexadecimal formatted string */
+
+ bin2hex(hash,hash,SHA_DIGEST_LENGTH);
+ hash[SHA_DIGEST_LENGTH*2] = '\0';
+
+ /* Send the reply */
- if((write(cl->meta_socket, buffer, buflen)) < 0)
- {
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
- return -1;
- }
cp
- return 0;
+ return send_request(c, "%d %s", CHAL_REPLY, hash);
}
-*/
-int send_key_request(ip_t to)
+int chal_reply_h(connection_t *c)
{
- conn_list_t *fw;
+ char hishash[MAX_STRING_SIZE];
+ char myhash[SHA_DIGEST_LENGTH];
cp
- fw = lookup_conn(to);
- if(!fw)
+ if(sscanf(c->buffer, "%*d "MAX_STRING, hishash) != 1)
{
- syslog(LOG_ERR, _("Attempting to send REQ_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
- return -1;
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "CHAL_REPLY", c->name, c->hostname);
+ 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);
+ /* Check if the length of the hash is all right */
- if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
+ if(strlen(hishash) != SHA_DIGEST_LENGTH*2)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, _("wrong challenge reply length"));
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
+ /* Convert the hash to binary format */
- 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;
- }
+ hex2bin(hishash, hishash, SHA_DIGEST_LENGTH);
+
+ /* Calculate the hash from the challenge we sent */
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Sending ANS_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
+ SHA1(c->hischallenge, RSA_size(c->rsa_key), myhash);
- buflen = snprintf(buffer, MAXBUFSIZE, "%d %lx %lx %d %s\n", ANS_KEY, to, myself->vpn_ip, my_key_expiry, my_public_key_base36);
+ /* Verify the incoming hash with the calculated hash */
- if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0)
+ if(memcmp(hishash, myhash, SHA_DIGEST_LENGTH))
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, _("wrong challenge reply"));
+ if(debug_lvl >= DEBUG_SCARY_THINGS)
+ {
+ bin2hex(myhash, hishash, SHA_DIGEST_LENGTH);
+ hishash[SHA_DIGEST_LENGTH*2] = '\0';
+ syslog(LOG_DEBUG, _("Expected challenge reply: %s"), hishash);
+ }
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);
+ /* Identity has now been positively verified.
+ Send an acknowledgement with the rest of the information needed.
+ */
+
+ c->allow_request = ACK;
cp
- return 0;
+ return send_ack(c);
}
-/*
- notify one connection of everything
- i have connected
-*/
-int notify_one(conn_list_t *new)
+int send_ack(connection_t *c)
{
- 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;
-}
+ /* ACK message contains rest of the information the other end needs
+ to create node_t and edge_t structures. */
-/*
- The incoming request handlers
-*/
+ struct timeval now;
-int basic_info_h(conn_list_t *cl)
-{
- conn_list_t *old;
+ /* Estimate weight */
+
+ gettimeofday(&now, NULL);
+ c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000;
cp
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got BASIC_INFO from %s"), cl->real_hostname);
+ return send_request(c, "%d %hd %d", ACK, myself->port, c->estimated_weight);
+}
- if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx %d", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port, &cl->flags) != 5)
+int ack_h(connection_t *c)
+{
+ port_t port;
+ int weight;
+ node_t *n;
+ subnet_t *s;
+ edge_t *e;
+ connection_t *other;
+ avl_node_t *node, *node2;
+cp
+ if(sscanf(c->buffer, "%*d %hd %d", &port, &weight) != 2)
{
- syslog(LOG_ERR, _("Got bad BASIC_INFO from %s"),
- cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ACK", c->name, c->hostname);
return -1;
}
-
- cl->vpn_hostname = hostlookup(htonl(cl->vpn_ip));
- if(cl->protocol_version != PROT_CURRENT)
+ /* Check if we already have a node_t for him */
+
+ n = lookup_node(c->name);
+
+ if(!n)
{
- syslog(LOG_ERR, _("Peer uses incompatible protocol version %d"),
- cl->protocol_version);
- return -1;
- }
+ n = new_node();
+ n->name = xstrdup(c->name);
+ n->address = c->address;
+ n->hostname = xstrdup(c->hostname);
+ n->port = port;
+
+ /* FIXME: Also check if no other tinc daemon uses the same IP and port for UDP traffic */
- if(cl->status.outgoing)
+ node_add(n);
+ }
+ else
{
- /* 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(n->connection)
{
- 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;
+ /* Oh dear, we already have a connection to this node. */
+ syslog(LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"), n->name, n->hostname);
+ terminate_connection(n->connection, 0);
}
-
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_basic_info(cl);
+
+ /* FIXME: check if information in existing node matches that of the other end of this connection */
}
- else
+
+ n->connection = c;
+ c->node = n;
+
+ /* Check some options
+
+ if((cfg = get_config_val(c->config, config_indirectdata)))
{
-
- if(setup_vpn_connection(cl) < 0)
- return -1;
- send_passphrase(cl);
+ if(cfg->data.val == stupid_true)
+ c->options |= OPTION_INDIRECT;
}
-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)
+ if((cfg = get_config_val(c->config, config_tcponly)))
{
- syslog(LOG_ERR, _("Got bad PASSPHRASE from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
+ if(cfg->data.val == stupid_true)
+ c->options |= OPTION_TCPONLY;
}
- 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);
+ if((myself->options | c->options) & OPTION_INDIRECT)
+ c->via = myself;
else
- send_public_key(cl);
-cp
- return 0;
-}
+ c->via = c;
-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;
- }
+ */
+
+ /* Create an edge_t for this connection */
+
+ c->edge = new_edge();
+
+ c->edge->from = myself;
+ c->edge->to = n;
+ c->edge->weight = (weight + c->estimated_weight) / 2;
+ c->edge->connection = c;
+
+ edge_add(c->edge);
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PUBLIC_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ /* Activate this connection */
- if(verify_passphrase(cl, g_n))
+ c->allow_request = ALL;
+ c->status.active = 1;
+ c->node->cipher = EVP_bf_cbc();
+ c->node->keylength = c->node->cipher->key_len + c->node->cipher->iv_len;
+
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Connection with %s (%s) activated"), c->name, c->hostname);
+
+cp
+ /* Send him our subnets */
+
+ for(node = myself->subnet_tree->head; node; node = node->next)
{
- /* intruder! */
- syslog(LOG_ERR, _("Intruder from %s: passphrase for %s does not match!"),
- cl->real_hostname, cl->vpn_hostname);
- return -1;
+ s = (subnet_t *)node->data;
+ send_add_subnet(c, s);
}
- if(cl->status.outgoing)
- send_public_key(cl);
- else
+ /* And send him all known nodes and their subnets */
+
+ for(node = node_tree->head; node; node = node->next)
{
- send_ack(cl);
+ n = (node_t *)node->data;
+
+ if(n == c->node || n == myself)
+ continue;
- /* 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.
- */
+ send_add_node(c, n);
- while((old = lookup_conn(cl->vpn_ip)))
+ for(node2 = c->node->subnet_tree->head; node2; node2 = node2->next)
{
- 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);
+ s = (subnet_t *)node2->data;
+ send_add_subnet(c, s);
}
-
- cl->status.active = 1;
+ }
+
+ /* Send all known edges */
+
+ for(node = edge_tree->head; node; node = node->next)
+ {
+ e = (edge_t *)node->data;
+
+ if(e == c->edge)
+ continue;
+
+ send_add_edge(c, e);
+ }
+
+ /* Notify others of this connection */
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, _("Connection with %s (%s) activated"),
- cl->vpn_hostname, cl->real_hostname);
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
- notify_others(cl, NULL, send_add_host);
- notify_one(cl);
+ if(other == c)
+ continue;
+
+ send_add_node(other, c->node);
+ send_add_edge(other, c->edge);
}
+
+ /* Run MST and SSSP algorithms */
+
+ mst_kruskal();
+ sssp_bfs(0);
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);
+/* Address and subnet information exchange */
- upstreamindex = 0;
+int send_add_subnet(connection_t *c, subnet_t *subnet)
+{
+ int x;
+ char *netstr;
cp
- return 0;
+ x = send_request(c, "%d %s %s", ADD_SUBNET,
+ subnet->owner->name, netstr = net2str(subnet));
+ free(netstr);
+cp
+ return x;
}
-int termreq_h(conn_list_t *cl)
+int add_subnet_h(connection_t *c)
{
-cp
- if(!cl->status.active)
+ char subnetstr[MAX_STRING_SIZE];
+ char name[MAX_STRING_SIZE];
+ node_t *owner;
+ connection_t *other;
+ subnet_t *s;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING, name, subnetstr) != 2)
{
- syslog(LOG_ERR, _("Got unauthorized TERMREQ from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_SUBNET", c->name, c->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;
-}
+ /* Check if owner name is a valid */
-int timeout_h(conn_list_t *cl)
-{
-cp
- if(!cl->status.active)
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Got unauthorized TIMEOUT from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid name"));
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;
-}
+ /* Check if subnet string is valid */
-int del_host_h(conn_list_t *cl)
-{
- ip_t vpn_ip;
- conn_list_t *fw;
-cp
- if(!cl->status.active)
+ if(!(s = str2net(subnetstr)))
{
- syslog(LOG_ERR, _("Got unauthorized DEL_HOST from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid subnet string"));
return -1;
}
- if(sscanf(cl->buffer, "%*d %lx", &vpn_ip) != 1)
+ /* Check if the owner of the new subnet is in the connection list */
+
+ if(!(owner = lookup_node(name)))
{
- 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;
+ syslog(LOG_ERR, _("Got ADD_SUBNET from %s (%s) for %s which is not in our connection list"),
+ name, c->name, c->hostname);
+ return -1;
}
- 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);
+ /* If everything is correct, add the subnet to the list of the owner */
- fw->status.termreq = 1;
- fw->status.active = 0;
+ subnet_add(owner, s);
- terminate_connection(fw);
+ /* Tell the rest */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_add_subnet(other, s);
+ }
cp
return 0;
}
-int tcppacket_h(conn_list_t *cl)
+int send_del_subnet(connection_t *c, subnet_t *s)
{
- real_packet_t rp;
- int len, count = 0, result;
- conn_list_t *f;
+ int x;
+ char *netstr;
cp
- if(!cl->status.active)
+ x = send_request(c, "%d %s %s", DEL_SUBNET, s->owner->name, netstr = net2str(s));
+ free(netstr);
+cp
+ return x;
+}
+
+int del_subnet_h(connection_t *c)
+{
+ char subnetstr[MAX_STRING_SIZE];
+ char name[MAX_STRING_SIZE];
+ node_t *owner;
+ connection_t *other;
+ subnet_t *s, *find;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING, name, subnetstr) != 3)
{
- syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name, c->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;
- }
+ /* Check if owner name is a valid */
- if(len > MTU)
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("Got PACKET length %d from %s (%s)"), len,
- cl->vpn_hostname, cl->real_hostname);
+ /* Check if subnet string is valid */
- /* Evil kludge comming up */
- while(len)
+ if(!(s = str2net(subnetstr)))
{
- if(debug_lvl > 3)
- syslog(LOG_DEBUG, _("Direct read count=%d len=%d rp=%p socket=%d"), count, len, ((char *)&rp)+count, cl->meta_socket);
-
- result=read(cl->meta_socket,((char *)&rp)+count,len);
- if(result<0)
- {
- syslog(LOG_ERR, _("Error while receiving PACKET data from %s (%s): %m"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
- count+=result;
- len-=result;
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid subnet string"));
+ return -1;
}
- total_socket_in += len;
+ /* Check if the owner of the new subnet is in the connection list */
- rp.data.len = ntohs(rp.data.len);
- rp.len = ntohs(rp.len);
- rp.from = ntohl(rp.from);
-
- if(rp.len >= 0)
+ if(!(owner = lookup_node(name)))
{
- f = lookup_conn(rp.from);
- if(!f)
- {
- syslog(LOG_ERR, _("Got packet from %s (%s) with unknown origin %d.%d.%d.%d?"),
- cl->vpn_hostname, cl->real_hostname, IP_ADDR_V(rp.from));
- return -1;
- }
+ syslog(LOG_ERR, _("Got %s from %s (%s) for %s which is not in our connection list"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return -1;
+ }
- if(f->status.validkey)
- xrecv(f, &rp);
- else
- {
-/* add_queue(&(f->rq), &rp, rp.len); We can't do this since rp is on the stack */
- if(!cl->status.waitingforkey)
- send_key_request(rp.from);
- }
+ /* If everything is correct, delete the subnet from the list of the owner */
- if(my_key_expiry <= time(NULL))
- regenerate_keys();
+ find = lookup_subnet(owner, s);
+
+ if(!find)
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) for %s which does not appear in his subnet tree"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return -1;
+ }
+
+ subnet_del(owner, s);
+
+ /* Tell the rest */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_del_subnet(other, s);
}
cp
return 0;
}
+/* New and closed connections notification */
-int ping_h(conn_list_t *cl)
+int send_add_node(connection_t *c, node_t *n)
{
cp
- if(!cl->status.active)
+ return send_request(c, "%d %s %lx:%d", ADD_NODE,
+ n->name, n->address, n->port);
+}
+
+int add_node_h(connection_t *c)
+{
+ connection_t *other;
+ node_t *n;
+ char name[MAX_STRING_SIZE];
+ ipv4_t address;
+ port_t port;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" %lx:%hd", name, &address, &port) != 3)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_NODE", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if identity is a valid name */
+
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Got unauthorized PING from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_NODE", c->name, c->hostname, _("invalid name"));
return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PING from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ /* Check if node already exists */
+
+ n = lookup_node(name);
+
+ if(n)
+ {
+ /* Check if it matches */
+
+ if(n->address != address || n->port != port)
+ syslog(LOG_DEBUG, _("Got %s from %s (%s) for %s which does not match existing entry"), "ADD_NODE", c->name, c->hostname, n->name);
+
+ return 0;
+ }
+ else
+ {
+ n = new_node();
+ n->name = xstrdup(name);
+ n->address = address;
+ n->port = port;
+ node_add(n);
+ }
+
+ /* Tell the rest about the new node */
- cl->status.pinged = 0;
- cl->status.got_pong = 1;
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other !=c)
+ send_add_node(other, n);
+ }
- send_pong(cl);
cp
return 0;
}
-int pong_h(conn_list_t *cl)
+int send_del_node(connection_t *c, node_t *n)
{
cp
- if(!cl->status.active)
+ return send_request(c, "%d %s %lx:%d", DEL_NODE,
+ n->name, n->address, n->port);
+}
+
+int del_node_h(connection_t *c)
+{
+ node_t *n;
+ char name[MAX_STRING_SIZE];
+ ipv4_t address;
+ port_t port;
+ connection_t *other;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" %lx:%hd", name, &address, &port) != 3)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_NODE",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if identity is a valid name */
+
+ if(check_id(name))
{
- syslog(LOG_ERR, _("Got unauthorized PONG from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_NODE", c->name, c->hostname, _("invalid name"));
return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got PONG from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ /* Check if somebody tries to delete ourself */
+
+ if(!strcmp(name, myself->name))
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) for ourself!"), "DEL_NODE",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if the deleted host exists */
+
+ n = lookup_node(name);
+
+ if(!n)
+ {
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which does not exist"), "DEL_NODE", c->name, c->hostname, n->name);
+ return 0;
+ }
+
+ /* Check if the rest matches */
+
+ if(address != n->address || port != n->port)
+ {
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which does not match existing entry"), "DEL_NODE", c->name, c->hostname, n->name);
+ }
+
+ /* Tell the rest about the deleted node */
- cl->status.got_pong = 1;
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_del_node(other, n);
+ }
+
+ /* Delete the node */
+
+ node_del(n);
+
+ mst_kruskal();
+ sssp_bfs(0);
cp
return 0;
}
-int add_host_h(conn_list_t *cl)
+/* Edges */
+
+int send_add_edge(connection_t *c, edge_t *e)
{
- ip_t real_ip;
- ip_t vpn_ip;
- ip_t vpn_mask;
- unsigned short port;
- int flags;
- conn_list_t *ncn, *old;
cp
- if(!cl->status.active)
+ return send_request(c, "%d %s %s %lx %d", ADD_NODE,
+ e->from->name, e->to->name, e->options, e->weight);
+}
+
+int add_edge_h(connection_t *c)
+{
+ connection_t *other;
+ edge_t *e;
+ node_t *from, *to;
+ char from_name[MAX_STRING_SIZE];
+ char to_name[MAX_STRING_SIZE];
+ long int options;
+ int weight;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" %lx %d", from_name, to_name, &options, &weight) != 4)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_EDGE", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if names are valid */
+
+ if(check_id(from_name))
{
- syslog(LOG_ERR, _("Got unauthorized ADD_HOST from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("invalid name"));
return -1;
}
-
- if(sscanf(cl->buffer, "%*d %lx %lx/%lx:%hx %d", &real_ip, &vpn_ip, &vpn_mask, &port, &flags) != 5)
+
+ if(check_id(to_name))
{
- syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Lookup nodes */
- if((old = lookup_conn(vpn_ip)))
+ from = lookup_node(from_name);
+
+ if(!from)
{
- if((real_ip==old->real_ip) && (vpn_mask==old->vpn_mask) && (port==old->port))
- {
- if(debug_lvl>1)
- syslog(LOG_NOTICE, _("Got duplicate ADD_HOST for %s (%s) from %s (%s)"),
- old->vpn_hostname, old->real_hostname, cl->vpn_hostname, cl->real_hostname);
- goto skip_add_host; /* One goto a day keeps the deeply nested if constructions away. */
- }
- else
- {
- if(debug_lvl>1)
- syslog(LOG_NOTICE, _("Removing old entry for %s (%s)"),
- old->vpn_hostname, old->real_hostname);
- old->status.active = 0;
- terminate_connection(old);
- }
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("unknown node"));
+ return -1;
+ }
+
+ to = lookup_node(to_name);
+
+ if(!to)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("unknown node"));
+ return -1;
}
+
+ /* Check if edge already exists */
+
+ e = lookup_edge(from, to);
- /* Connections lists are really messed up if this happens */
- if(vpn_ip == myself->vpn_ip)
+ if(e)
{
- syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"),
- cl->vpn_hostname, cl->real_hostname);
- sighup = 1;
+ if(e->weight != weight || e->options != options)
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) which does not match existing entry"), "ADD_EDGE", c->name, c->hostname);
+ return -1;
+ }
+
return 0;
}
-
- ncn = new_conn_list();
- ncn->real_ip = real_ip;
- ncn->real_hostname = hostlookup(htonl(real_ip));
- ncn->vpn_ip = vpn_ip;
- ncn->vpn_mask = vpn_mask;
- ncn->vpn_hostname = hostlookup(htonl(vpn_ip));
- ncn->port = port;
- ncn->flags = flags;
- ncn->nexthop = cl;
- ncn->next = conn_list;
- conn_list = ncn;
- ncn->status.active = 1;
-
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got ADD_HOST for %s (%s) from %s (%s)"),
- ncn->vpn_hostname, ncn->real_hostname, cl->vpn_hostname, cl->real_hostname);
-
- notify_others(ncn, cl, send_add_host);
-
-skip_add_host:
+ else
+ {
+ e = new_edge();
+ e->from = from;
+ e->to = to;
+ e->options = options;
+ e->weight = weight;
+ edge_add(e);
+ }
+
+ /* Tell the rest about the new edge */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_add_edge(other, e);
+ }
+
+ /* Run MST before or after we tell the rest? */
+
+ mst_kruskal();
+ sssp_bfs(0);
cp
return 0;
}
-int req_key_h(conn_list_t *cl)
+int send_del_edge(connection_t *c, edge_t *e)
{
- ip_t to;
- ip_t from;
- conn_list_t *fw;
cp
- if(!cl->status.active)
+ return send_request(c, "%d %s %s %lx %d", DEL_EDGE,
+ e->from->name, e->to->name, e->options, e->weight);
+}
+
+int del_edge_h(connection_t *c)
+{
+ edge_t *e;
+ char from_name[MAX_STRING_SIZE];
+ char to_name[MAX_STRING_SIZE];
+ node_t *from, *to;
+ long int options;
+ int weight;
+ connection_t *other;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" %lx %d", from_name, to_name, &options, &weight) != 4)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_EDGE",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if names are valid */
+
+ if(check_id(from_name))
{
- syslog(LOG_ERR, _("Got unauthorized REQ_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("invalid name"));
return -1;
}
- if(sscanf(cl->buffer, "%*d %lx %lx", &to, &from) != 2)
+ if(check_id(to_name))
{
- syslog(LOG_ERR, _("Got bad REQ_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got REQ_KEY origin %d.%d.%d.%d destination %d.%d.%d.%d from %s (%s)"),
- IP_ADDR_V(from), IP_ADDR_V(to), cl->vpn_hostname, cl->real_hostname);
+ /* Lookup nodes */
- if((to & myself->vpn_mask) == (myself->vpn_ip & myself->vpn_mask))
- { /* hey! they want something from ME! :) */
- send_key_answer(cl, from);
- return 0;
+ from = lookup_node(from_name);
+
+ if(!from)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("unknown node"));
+ return -1;
}
- fw = lookup_conn(to);
+ to = lookup_node(to_name);
- if(!fw)
+ if(!to)
{
- syslog(LOG_ERR, _("Attempting to forward REQ_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("unknown node"));
return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Forwarding REQ_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
+ /* Check if edge exists */
- cl->buffer[cl->reqlen-1] = '\n';
+ e = lookup_edge(from, to);
- if(write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen) < 0)
+ if(e)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ if(e->weight != weight || e->options != options)
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) which does not match existing entry"), "ADD_EDGE", c->name, c->hostname);
+ return -1;
+ }
+ }
+ else
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("unknown edge"));
return -1;
}
+
+ /* Tell the rest about the deleted edge */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other->status.active && other != c)
+ send_del_edge(other, e);
+ }
+
+ /* Delete the edge */
+
+ edge_del(e);
+
+ /* Run MST before or after we tell the rest? */
+
+ mst_kruskal();
+ sssp_bfs(1);
cp
return 0;
}
-void set_keys(conn_list_t *cl, int expiry, char *key)
+
+/* Status and error notification routines */
+
+int send_status(connection_t *c, int statusno, char *statusstring)
{
- char *ek;
cp
- if(!cl->public_key)
+ if(!statusstring)
+ statusstring = status_text[statusno];
+cp
+ return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
+}
+
+int status_h(connection_t *c)
+{
+ int statusno;
+ char statusstring[MAX_STRING_SIZE];
+cp
+ if(sscanf(c->buffer, "%*d %d "MAX_STRING, &statusno, statusstring) != 2)
{
- cl->public_key = xmalloc(sizeof(*cl->key));
- cl->public_key->key = NULL;
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
+ c->name, c->hostname);
+ return -1;
}
-
- if(cl->public_key->key)
- free(cl->public_key->key);
- cl->public_key->length = strlen(key);
- cl->public_key->expiry = expiry;
- cl->public_key->key = xmalloc(cl->public_key->length + 1);
- strcpy(cl->public_key->key, key);
-
- ek = make_shared_key(key);
-
- if(!cl->key)
+
+ if(debug_lvl >= DEBUG_STATUS)
{
- cl->key = xmalloc(sizeof(*cl->key));
- cl->key->key = NULL;
+ syslog(LOG_NOTICE, _("Status message from %s (%s): %s: %s"),
+ c->name, c->hostname, status_text[statusno], statusstring);
}
- if(cl->key->key)
- free(cl->key->key);
+cp
+ return 0;
+}
- cl->key->length = strlen(ek);
- cl->key->expiry = expiry;
- cl->key->key = xmalloc(cl->key->length + 1);
- strcpy(cl->key->key, ek);
+int send_error(connection_t *c, int err, char *errstring)
+{
cp
+ if(!errstring)
+ errstring = strerror(err);
+ return send_request(c, "%d %d %s", ERROR, err, errstring);
}
-int ans_key_h(conn_list_t *cl)
+int error_h(connection_t *c)
{
- ip_t to;
- ip_t from;
- int expiry;
- char *key;
- conn_list_t *fw, *gk;
+ int err;
+ char errorstring[MAX_STRING_SIZE];
cp
- if(!cl->status.active)
+ if(sscanf(c->buffer, "%*d %d "MAX_STRING, &err, errorstring) != 2)
{
- syslog(LOG_ERR, _("Got unauthorized ANS_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
+ c->name, c->hostname);
+ return -1;
}
- if(sscanf(cl->buffer, "%*d %lx %lx %d %as", &to, &from, &expiry, &key) != 4)
+ if(debug_lvl >= DEBUG_ERROR)
{
- syslog(LOG_ERR, _("Got bad ANS_KEY from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
+ syslog(LOG_NOTICE, _("Error message from %s (%s): %s: %s"),
+ c->name, c->hostname, strerror(err), errorstring);
+ }
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got ANS_KEY origin %d.%d.%d.%d destination %d.%d.%d.%d from %s (%s)"),
- IP_ADDR_V(from), IP_ADDR_V(to), cl->vpn_hostname, cl->real_hostname);
+ terminate_connection(c, c->status.active);
+cp
+ return 0;
+}
- if(to == myself->vpn_ip)
- { /* hey! that key's for ME! :) */
- gk = lookup_conn(from);
+int send_termreq(connection_t *c)
+{
+cp
+ return send_request(c, "%d", TERMREQ);
+}
- if(!gk)
- {
- syslog(LOG_ERR, _("Receiving ANS_KEY origin %d.%d.%d.%d from %s (%s), which does not exist?"),
- IP_ADDR_V(from), cl->vpn_hostname, cl->real_hostname);
- return -1;
- }
+int termreq_h(connection_t *c)
+{
+cp
+ terminate_connection(c, c->status.active);
+cp
+ return 0;
+}
- set_keys(gk, expiry, key);
- gk->status.validkey = 1;
- gk->status.waitingforkey = 0;
- flush_queues(gk);
- return 0;
+int send_ping(connection_t *c)
+{
+ char salt[SALTLEN*2+1];
+cp
+ c->status.pinged = 1;
+ c->last_ping_time = time(NULL);
+ RAND_pseudo_bytes(salt, SALTLEN);
+ bin2hex(salt, salt, SALTLEN);
+ salt[SALTLEN*2] = '\0';
+cp
+ return send_request(c, "%d %s", PING, salt);
+}
+
+int ping_h(connection_t *c)
+{
+cp
+ return send_pong(c);
+}
+
+int send_pong(connection_t *c)
+{
+ char salt[SALTLEN*2+1];
+cp
+ RAND_pseudo_bytes(salt, SALTLEN);
+ bin2hex(salt, salt, SALTLEN);
+ salt[SALTLEN*2] = '\0';
+cp
+ return send_request(c, "%d %s", PONG, salt);
+}
+
+int pong_h(connection_t *c)
+{
+cp
+ c->status.pinged = 0;
+cp
+ return 0;
+}
+
+/* Key exchange */
+
+int send_key_changed(connection_t *c, node_t *n)
+{
+ connection_t *other;
+ avl_node_t *node;
+cp
+ /* Only send this message if some other daemon requested our key previously.
+ This reduces unnecessary key_changed broadcasts.
+ */
+
+ if(n == myself && !mykeyused)
+ return 0;
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+ if(other != c && other->status.active)
+ send_request(other, "%d %s", KEY_CHANGED, n->name);
}
+cp
+ return 0;
+}
- fw = lookup_conn(to);
-
- if(!fw)
+int key_changed_h(connection_t *c)
+{
+ char name[MAX_STRING_SIZE];
+ node_t *n;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING, name) != 1)
{
- syslog(LOG_ERR, _("Attempting to forward ANS_KEY to %d.%d.%d.%d, which does not exist?"),
- IP_ADDR_V(to));
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "KEY_CHANGED",
+ c->name, c->hostname);
return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Forwarding ANS_KEY to %s (%s)"),
- fw->nexthop->vpn_hostname, fw->nexthop->real_hostname);
+ n = lookup_node(name);
- cl->buffer[cl->reqlen-1] = '\n';
-
- if((write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen)) < 0)
+ if(!n)
{
- syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
+ syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist"), "KEY_CHANGED",
+ c->name, c->hostname, name);
return -1;
}
+
+ n->status.validkey = 0;
+ n->status.waitingforkey = 0;
+
+ send_key_changed(c, n);
cp
return 0;
}
-int key_changed_h(conn_list_t *cl)
+int send_req_key(connection_t *c, node_t *from, node_t *to)
{
- ip_t from;
- conn_list_t *ik;
cp
- if(!cl->status.active)
+ return send_request(c, "%d %s %s", REQ_KEY,
+ from->name, to->name);
+}
+
+int req_key_h(connection_t *c)
+{
+ char from_name[MAX_STRING_SIZE];
+ char to_name[MAX_STRING_SIZE];
+ node_t *from, *to;
+ char key[MAX_STRING_SIZE];
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING, from_name, to_name) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "REQ_KEY",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ from = lookup_node(from_name);
+
+ if(!from)
{
- syslog(LOG_ERR, _("Got unauthorized KEY_CHANGED from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"), "REQ_KEY",
+ c->name, c->hostname, from_name);
return -1;
}
- if(sscanf(cl->buffer, "%*d %lx", &from) != 1)
+ to = lookup_node(to_name);
+
+ if(!to)
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"), "REQ_KEY",
+ c->name, c->hostname, to_name);
+ return -1;
+ }
+
+ /* Check if this key request is for us */
+
+ if(to == myself) /* Yes, send our own key back */
+ {
+ bin2hex(myself->key, key, myself->keylength);
+ key[myself->keylength * 2] = '\0';
+ send_ans_key(c, myself, from, key);
+ mykeyused = 1;
+ }
+ else
+ {
+ if(to->status.validkey) /* Proxy keys */
+ {
+ bin2hex(to->key, key, to->keylength);
+ key[to->keylength * 2] = '\0';
+ send_ans_key(c, to, from, key);
+ }
+ else
+ send_req_key(to->nexthop->connection, from, to);
+ }
+
+cp
+ return 0;
+}
+
+int send_ans_key(connection_t *c, node_t *from, node_t *to, char *key)
+{
+cp
+ return send_request(c, "%d %s %s %s", ANS_KEY,
+ from->name, to->name, key);
+}
+
+int ans_key_h(connection_t *c)
+{
+ char from_name[MAX_STRING_SIZE];
+ char to_name[MAX_STRING_SIZE];
+ char key[MAX_STRING_SIZE];
+ int keylength;
+ node_t *from, *to;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING, from_name, to_name, key) != 3)
{
- syslog(LOG_ERR, _("Got bad KEY_CHANGED from %s (%s)"),
- cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ANS_KEY",
+ c->name, c->hostname);
return -1;
- }
+ }
- ik = lookup_conn(from);
+ from = lookup_node(from_name);
- if(!ik)
+ if(!from)
{
- syslog(LOG_ERR, _("Got KEY_CHANGED origin %d.%d.%d.%d from %s (%s), which does not exist?"),
- IP_ADDR_V(from), cl->vpn_hostname, cl->real_hostname);
+ syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"), "ANS_KEY",
+ c->name, c->hostname, from_name);
return -1;
}
- if(debug_lvl > 1)
- syslog(LOG_DEBUG, _("Got KEY_CHANGED origin %s from %s (%s)"),
- ik->vpn_hostname, cl->vpn_hostname, cl->real_hostname);
+ to = lookup_node(to_name);
+
+ if(!to)
+ {
+ syslog(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"), "ANS_KEY",
+ c->name, c->hostname, to_name);
+ return -1;
+ }
- ik->status.validkey = 0;
- ik->status.waitingforkey = 0;
+ /* Check correctness of packet key */
- notify_others(ik, cl, send_key_changed);
+ keylength = strlen(key);
+
+ if(keylength != from->keylength * 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s) origin %s: %s"), "ANS_KEY",
+ c->name, c->hostname, from->name, _("invalid key length"));
+ return -1;
+ }
+
+ /* Forward it if necessary */
+
+ if(to != myself)
+ {
+ send_ans_key(to->nexthop->connection, from, to, key);
+ }
+
+ /* Update our copy of the origin's packet key */
+
+ if(from->key)
+ free(from->key);
+
+ from->key = xstrdup(key);
+ keylength /= 2;
+ hex2bin(from->key, from->key, keylength);
+ from->key[keylength] = '\0';
+
+ from->status.validkey = 1;
+ from->status.waitingforkey = 0;
+
+ flush_queue(from);
cp
return 0;
}
-int (*request_handlers[256])(conn_list_t*) = {
- 0, ack_h, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- termreq_h, timeout_h, del_host_h, 0, 0, 0, 0, 0, 0, 0,
- ping_h, pong_h, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- add_host_h, basic_info_h, passphrase_h, public_key_h, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- tcppacket_h, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- req_key_h, ans_key_h, key_changed_h, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0
+int send_tcppacket(connection_t *c, vpn_packet_t *packet)
+{
+ int x;
+cp
+ /* Evil hack. */
+
+ x = send_request(c, "%d %hd", PACKET, packet->len);
+
+ if(x)
+ return x;
+cp
+ return send_meta(c, packet->data, packet->len);
+}
+
+int tcppacket_h(connection_t *c)
+{
+ short int len;
+cp
+ if(sscanf(c->buffer, "%*d %hd", &len) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
+
+ c->tcplen = len;
+cp
+ return 0;
+}
+
+/* Jumptable for the request handlers */
+
+int (*request_handlers[])(connection_t*) = {
+ id_h, metakey_h, challenge_h, chal_reply_h, ack_h,
+ status_h, error_h, termreq_h,
+ ping_h, pong_h,
+ add_node_h, del_node_h,
+ add_subnet_h, del_subnet_h,
+ add_edge_h, del_edge_h,
+ key_changed_h, req_key_h, ans_key_h,
+ tcppacket_h,
+};
+
+/* Request names */
+
+char (*request_name[]) = {
+ "ID", "METAKEY", "CHALLENGE", "CHAL_REPLY", "ACK",
+ "STATUS", "ERROR", "TERMREQ",
+ "PING", "PONG",
+ "ADD_NODE", "DEL_NODE",
+ "ADD_SUBNET", "DEL_SUBNET",
+ "ADD_EDGE", "DEL_EDGE",
+ "KEY_CHANGED", "REQ_KEY", "ANS_KEY",
+ "PACKET",
+};
+
+/* Status strings */
+
+char (*status_text[]) = {
+ "Warning",
+};
+
+/* Error strings */
+
+char (*error_text[]) = {
+ "Error",
};
projects / tinc / blobdiff