--- /dev/null
+/*
+ event.c -- event queue
+ Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
+ 2002 Ivo Timmermans <itimmermans@bigfoot.com>
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: event.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <xalloc.h>
+#include <string.h>
+#include <utils.h>
+#include <avl_tree.h>
+#include <time.h>
+
+#include "event.h"
+
+#include "system.h"
+
+avl_tree_t *event_tree;
+
+int id;
+
+int event_compare(event_t *a, event_t *b)
+{
+ if(a->time > b->time)
+ return 1;
+ if(a->time < b->time)
+ return -1;
+ return a->id - b->id;
+}
+
+void init_events(void)
+{
+cp
+ event_tree = avl_alloc_tree((avl_compare_t)event_compare, NULL);
+cp
+}
+
+void exit_events(void)
+{
+cp
+ avl_delete_tree(event_tree);
+cp
+}
+
+event_t *new_event(void)
+{
+ event_t *event;
+cp
+ event = (event_t *)xmalloc_and_zero(sizeof(*event));
+cp
+ return event;
+}
+
+void free_event(event_t *event)
+{
+cp
+ free(event);
+cp
+}
+
+void event_add(event_t *event)
+{
+cp
+ event->id = ++id;
+ avl_insert(event_tree, event);
+cp
+}
+
+void event_del(event_t *event)
+{
+cp
+ avl_delete(event_tree, event);
+cp
+}
+
+event_t *get_expired_event(void)
+{
+ event_t *event;
+cp
+ if(event_tree->head)
+ {
+ event = (event_t *)event_tree->head->data;
+ if(event->time < time(NULL))
+ {
+ avl_delete(event_tree, event);
+ return event;
+ }
+ }
+cp
+ return NULL;
+}
--- /dev/null
+/*
+ event.h -- header for event.c
+ Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
+ 2002 Ivo Timmermans <itimmermans@bigfoot.com>
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: event.h,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#ifndef __TINC_EVENT_H__
+#define __TINC_EVENT_H__
+
+#include <time.h>
+#include <avl_tree.h>
+
+avl_tree_t *event_tree;
+
+typedef void (*event_handler_t)(void *);
+
+typedef struct {
+ time_t time;
+ int id;
+ event_handler_t handler;
+ void *data;
+} event_t;
+
+extern void init_events(void);
+extern void exit_events(void);
+extern event_t *new_event(void);
+extern void free_event(event_t *);
+extern void event_add(event_t *);
+extern void event_del(event_t *);
+extern event_t *get_expired_event(void);
+
+#endif /* __TINC_EVENT_H__ */
--- /dev/null
+/*
+ protocol_auth.c -- handle the meta-protocol, authentication
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: protocol_auth.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.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 "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"
+
+int send_id(connection_t *c)
+{
+cp
+ return send_request(c, "%d %s %d", ID, myself->connection->name, myself->connection->protocol_version);
+}
+
+int id_h(connection_t *c)
+{
+ char name[MAX_STRING_SIZE];
+ int bla;
+cp
+ 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;
+ }
+
+ /* Check if identity is a valid name */
+
+ if(check_id(name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ID", c->name, c->hostname, "invalid name");
+ return -1;
+ }
+
+ /* 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, _("Peer %s (%s) uses incompatible version %d"),
+ c->name, c->hostname, c->protocol_version);
+ return -1;
+ }
+
+ if(bypass_security)
+ {
+ if(!c->config_tree)
+ init_configuration(&c->config_tree);
+ c->allow_request = ACK;
+ return send_ack(c);
+ }
+
+ if(!c->config_tree)
+ {
+ init_configuration(&c->config_tree);
+
+ if((bla = read_connection_config(c)))
+ {
+ syslog(LOG_ERR, _("Peer %s had unknown identity (%s)"), c->hostname, c->name);
+ return -1;
+ }
+ }
+
+ if(read_rsa_public_key(c))
+ {
+ return -1;
+ }
+
+ /* Check some options */
+
+ if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &bla) && bla) || myself->options & OPTION_INDIRECT)
+ c->options |= OPTION_INDIRECT;
+
+ if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &bla) && bla) || myself->options & OPTION_TCPONLY)
+ c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
+
+ c->allow_request = METAKEY;
+cp
+ return send_metakey(c);
+}
+
+int send_metakey(connection_t *c)
+{
+ char buffer[MAX_STRING_SIZE];
+ int len, x;
+cp
+ len = RSA_size(c->rsa_key);
+
+ /* Allocate buffers for the meta key */
+
+ if(!c->outkey)
+ c->outkey = xmalloc(len);
+
+ if(!c->outctx)
+ c->outctx = xmalloc(sizeof(*c->outctx));
+cp
+ /* Copy random data to the buffer */
+
+ RAND_bytes(c->outkey, len);
+
+ /* 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);
+ }
+
+ /* 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, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
+ return -1;
+ }
+cp
+ /* 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);
+
+ /* 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 metakey_h(connection_t *c)
+{
+ char buffer[MAX_STRING_SIZE];
+ int len;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING, buffer) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name, c->hostname);
+ return -1;
+ }
+cp
+ len = RSA_size(myself->connection->rsa_key);
+
+ /* Check if the length of the meta key is all right */
+
+ if(strlen(buffer) != len*2)
+ {
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong keylength");
+ return -1;
+ }
+
+ /* Allocate buffers for the meta key */
+cp
+ if(!c->inkey)
+ c->inkey = xmalloc(len);
+
+ if(!c->inctx)
+ c->inctx = xmalloc(sizeof(*c->inctx));
+
+ /* Convert the challenge from hexadecimal back to binary */
+cp
+ hex2bin(buffer,buffer,len);
+
+ /* Decrypt the meta key */
+cp
+ if(RSA_private_decrypt(len, buffer, c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) /* See challenge() */
+ {
+ syslog(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
+ return -1;
+ }
+
+ 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. */
+cp
+ 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_challenge(connection_t *c)
+{
+ char buffer[MAX_STRING_SIZE];
+ int len, x;
+cp
+ /* CHECKME: what is most reasonable value for len? */
+
+ len = RSA_size(c->rsa_key);
+
+ /* Allocate buffers for the challenge */
+
+ if(!c->hischallenge)
+ c->hischallenge = xmalloc(len);
+cp
+ /* Copy random data to the buffer */
+
+ RAND_bytes(c->hischallenge, len);
+
+cp
+ /* Convert to hex */
+
+ bin2hex(c->hischallenge, buffer, len);
+ buffer[len*2] = '\0';
+
+cp
+ /* Send the challenge */
+
+ x = send_request(c, "%d %s", CHALLENGE, buffer);
+cp
+ return x;
+}
+
+int challenge_h(connection_t *c)
+{
+ char buffer[MAX_STRING_SIZE];
+ int len;
+cp
+ 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;
+ }
+
+ len = RSA_size(myself->connection->rsa_key);
+
+ /* Check if the length of the challenge is all right */
+
+ if(strlen(buffer) != len*2)
+ {
+ 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 send_chal_reply(c);
+}
+
+int send_chal_reply(connection_t *c)
+{
+ char hash[SHA_DIGEST_LENGTH*2+1];
+cp
+ /* 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 */
+
+cp
+ return send_request(c, "%d %s", CHAL_REPLY, hash);
+}
+
+int chal_reply_h(connection_t *c)
+{
+ char hishash[MAX_STRING_SIZE];
+ char myhash[SHA_DIGEST_LENGTH];
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING, hishash) != 1)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "CHAL_REPLY", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if the length of the hash is all right */
+
+ if(strlen(hishash) != SHA_DIGEST_LENGTH*2)
+ {
+ syslog(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, _("wrong challenge reply length"));
+ return -1;
+ }
+
+ /* Convert the hash to binary format */
+
+ hex2bin(hishash, hishash, SHA_DIGEST_LENGTH);
+
+ /* Calculate the hash from the challenge we sent */
+
+ SHA1(c->hischallenge, RSA_size(c->rsa_key), myhash);
+
+ /* Verify the incoming hash with the calculated hash */
+
+ if(memcmp(hishash, myhash, SHA_DIGEST_LENGTH))
+ {
+ 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;
+ }
+
+ /* Identity has now been positively verified.
+ Send an acknowledgement with the rest of the information needed.
+ */
+
+ c->allow_request = ACK;
+cp
+ return send_ack(c);
+}
+
+int send_ack(connection_t *c)
+{
+ /* ACK message contains rest of the information the other end needs
+ to create node_t and edge_t structures. */
+
+ int x;
+ char *addrstr;
+ struct timeval now;
+cp
+ /* Estimate weight */
+
+ gettimeofday(&now, NULL);
+ c->estimated_weight = (now.tv_sec - c->start.tv_sec) * 1000 + (now.tv_usec - c->start.tv_usec) / 1000;
+ addrstr = address2str(c->address);
+ x = send_request(c, "%d %hd %s %d %d", ACK, myself->port, addrstr, c->estimated_weight, c->options);
+ free(addrstr);
+cp
+ return x;
+}
+
+void send_everything(connection_t *c)
+{
+ avl_node_t *node, *node2;
+ node_t *n;
+ subnet_t *s;
+ edge_t *e;
+
+ /* Send all known subnets */
+
+ for(node = node_tree->head; node; node = node->next)
+ {
+ n = (node_t *)node->data;
+
+ for(node2 = n->subnet_tree->head; node2; node2 = node2->next)
+ {
+ s = (subnet_t *)node2->data;
+ send_add_subnet(c, s);
+ }
+ }
+
+ /* 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);
+ }
+}
+
+int ack_h(connection_t *c)
+{
+ port_t hisport;
+ char addrstr[MAX_STRING_SIZE];
+ int weight;
+ int options;
+ node_t *n;
+ connection_t *other;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d %hd "MAX_STRING" %d %d", &hisport, addrstr, &weight, &options) != 4)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ACK", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if we already have a node_t for him */
+
+ n = lookup_node(c->name);
+
+ if(!n)
+ {
+ n = new_node();
+ n->name = xstrdup(c->name);
+ n->address = c->address;
+ n->hostname = xstrdup(c->hostname);
+ n->port = hisport;
+
+ /* FIXME: Also check if no other tinc daemon uses the same IP and port for UDP traffic */
+
+ node_add(n);
+ }
+ else
+ {
+ if(n->connection)
+ {
+ /* Oh dear, we already have a connection to this node. */
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"), n->name, n->hostname);
+ terminate_connection(n->connection, 0);
+ }
+
+ /* FIXME: check if information in existing node matches that of the other end of this connection */
+ }
+
+ n->connection = c;
+ c->node = n;
+ c->options |= options;
+
+ /* Create an edge_t for this connection */
+
+ c->edge = new_edge();
+
+ c->edge->from.node = myself;
+ c->edge->from.address = str2address(addrstr);
+ c->edge->from.port = myself->port;
+ c->edge->to.node = n;
+ c->edge->to.address = c->address;
+ c->edge->to.port = hisport;
+ c->edge->weight = (weight + c->estimated_weight) / 2;
+ c->edge->connection = c;
+ c->edge->options = c->options;
+
+ edge_add(c->edge);
+
+ /* Activate this connection */
+
+ c->allow_request = ALL;
+ c->status.active = 1;
+
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Connection with %s (%s) activated"), c->name, c->hostname);
+
+cp
+ /* Send him everything we know */
+
+ send_everything(c);
+
+ /* Notify others of this connection */
+
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ other = (connection_t *)node->data;
+
+ if(other->status.active && other != c)
+ send_add_edge(other, c->edge);
+ }
+
+ /* Run MST and SSSP algorithms */
+
+ graph();
+
+ /* Succesful connection, reset timeout if this is an outgoing connection. */
+
+ if(c->outgoing)
+ c->outgoing->timeout = 0;
+cp
+ return 0;
+}
--- /dev/null
+/*
+ protocol_edge.c -- handle the meta-protocol, edges
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: protocol_edge.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+
+#include "conf.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"
+
+int send_add_edge(connection_t *c, edge_t *e)
+{
+ int x;
+ char *from_addrstr, *to_addrstr;
+cp
+ from_addrstr = address2str(e->from.address);
+ to_addrstr = address2str(e->to.address);
+ x = send_request(c, "%d %s %s %hd %s %s %hd %lx %d", ADD_EDGE,
+ e->from.node->name, from_addrstr, e->from.port,
+ e->to.node->name, to_addrstr, e->to.port,
+ e->options, e->weight);
+ free(from_addrstr);
+ free(to_addrstr);
+cp
+ return x;
+}
+
+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];
+ char from_addrstr[MAX_STRING_SIZE];
+ char to_addrstr[MAX_STRING_SIZE];
+ ipv4_t from_address, to_address;
+ port_t from_port, to_port;
+ long int options;
+ int weight;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" %hd "MAX_STRING" "MAX_STRING" %hd %lx %d",
+ from_name, from_addrstr, &from_port,
+ to_name, to_addrstr, &to_port,
+ &options, &weight) != 8)
+ {
+ 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 bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ if(check_id(to_name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Lookup nodes */
+
+ from = lookup_node(from_name);
+
+ if(!from)
+ {
+ from = new_node();
+ from->name = xstrdup(from_name);
+ node_add(from);
+ }
+
+ to = lookup_node(to_name);
+
+ if(!to)
+ {
+ to = new_node();
+ to->name = xstrdup(to_name);
+ node_add(to);
+ }
+
+ /* Convert addresses */
+
+ from_address = str2address(from_addrstr);
+ to_address = str2address(to_addrstr);
+
+ /* Check if edge already exists */
+
+ e = lookup_edge(from, to);
+
+ if(e)
+ {
+ if(e->weight != weight || e->options != options
+ || ((e->from.node == from) && (e->from.address != from_address || e->from.port != from_port || e->to.address != to_address || e->to.port != to_port))
+ || ((e->from.node == to) && (e->from.address != to_address || e->from.port != to_port || e->to.address != from_address || e->to.port != from_port))
+ )
+ {
+ if(from == myself || to == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself which does not match existing entry"), "ADD_EDGE", c->name, c->hostname);
+ send_add_edge(c, e);
+ return 0;
+ }
+ else
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) which does not match existing entry"), "ADD_EDGE", c->name, c->hostname);
+ edge_del(e);
+ }
+ }
+ else
+ return 0;
+ }
+ else if(from == myself || to == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself which does not exist"), "ADD_EDGE", c->name, c->hostname);
+ e = new_edge();
+ e->from.node = from;
+ e->to.node = to;
+ send_del_edge(c, e);
+ free_edge(e);
+ return 0;
+ }
+
+
+
+ e = new_edge();
+ e->from.node = from;
+ e->from.address = from_address;
+ e->from.port = from_port;
+ e->to.node = to;
+ e->to.address = to_address;
+ e->to.port = to_port;
+ 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? */
+
+ graph();
+cp
+ return 0;
+}
+
+int send_del_edge(connection_t *c, edge_t *e)
+{
+cp
+ return send_request(c, "%d %s %s", DEL_EDGE,
+ e->from.node->name, e->to.node->name);
+}
+
+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;
+ connection_t *other;
+ avl_node_t *node;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING"", from_name, to_name) != 2)
+ {
+ 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 bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ if(check_id(to_name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Lookup nodes */
+
+ from = lookup_node(from_name);
+
+ if(!from)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_ERR, _("Got %s from %s (%s) which does not appear in the edge tree"), "DEL_EDGE", c->name, c->hostname);
+ return 0;
+ }
+
+ to = lookup_node(to_name);
+
+ if(!to)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_ERR, _("Got %s from %s (%s) which does not appear in the edge tree"), "DEL_EDGE", c->name, c->hostname);
+ return 0;
+ }
+
+ /* Check if edge exists */
+
+ e = lookup_edge(from, to);
+
+ if(!e)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) which does not appear in the edge tree"), "DEL_EDGE", c->name, c->hostname);
+ return 0;
+ }
+
+ if(e->from.node == myself || e->to.node == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "DEL_EDGE", c->name, c->hostname);
+ send_add_edge(c, e); /* Send back a correction */
+ return 0;
+ }
+
+ /* 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? */
+
+ graph();
+cp
+ return 0;
+}
--- /dev/null
+/*
+ protocol_key.c -- handle the meta-protocol, key exchange
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: protocol_key.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+
+#include "conf.h"
+#include "net.h"
+#include "netutl.h"
+#include "protocol.h"
+#include "meta.h"
+#include "connection.h"
+#include "node.h"
+#include "edge.h"
+\
+#include "system.h"
+
+int mykeyused = 0;
+
+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->status.active && other->status.mst && other != c)
+ send_request(other, "%d %s", KEY_CHANGED, n->name);
+ }
+cp
+ return 0;
+}
+
+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, _("Got bad %s from %s (%s)"), "KEY_CHANGED",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ n = lookup_node(name);
+
+ if(!n)
+ {
+ 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;
+ n->sent_seqno = 0;
+
+ send_key_changed(c, n);
+cp
+ return 0;
+}
+
+int send_req_key(connection_t *c, node_t *from, node_t *to)
+{
+cp
+ 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;
+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 %s from %s (%s) origin %s which does not exist in our connection list"), "REQ_KEY",
+ c->name, c->hostname, from_name);
+ return -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 */
+ {
+ mykeyused = 1;
+ from->received_seqno = 0;
+ send_ans_key(c, myself, from);
+ }
+ else
+ {
+/* Proxy keys
+ if(to->status.validkey)
+ {
+ send_ans_key(c, to, from);
+ }
+ 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[MAX_STRING_SIZE];
+cp
+ bin2hex(from->key, key, from->keylength);
+ key[from->keylength * 2] = '\0';
+cp
+ return send_request(c, "%d %s %s %s %d %d %d", ANS_KEY,
+ from->name, to->name, key, from->cipher?from->cipher->nid:0, from->digest?from->digest->type:0, from->maclength);
+}
+
+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 cipher, digest, maclength;
+ node_t *from, *to;
+cp
+ if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d", from_name, to_name, key, &cipher, &digest, &maclength) != 6)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ANS_KEY",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ from = lookup_node(from_name);
+
+ if(!from)
+ {
+ 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;
+ }
+
+ 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;
+ }
+
+ /* Forward it if necessary */
+
+ if(to != myself)
+ {
+ return send_request(to->nexthop->connection, c->buffer);
+ }
+
+ /* Update our copy of the origin's packet key */
+
+ if(from->key)
+ free(from->key);
+
+ from->key = xstrdup(key);
+ from->keylength = strlen(key) / 2;
+ hex2bin(from->key, from->key, from->keylength);
+ from->key[from->keylength] = '\0';
+
+ from->status.validkey = 1;
+ from->status.waitingforkey = 0;
+
+ /* Check and lookup cipher and digest algorithms */
+
+ if(cipher)
+ {
+ from->cipher = EVP_get_cipherbynid(cipher);
+ if(!from->cipher)
+ {
+ syslog(LOG_ERR, _("Node %s (%s) uses unknown cipher!"), from->name, from->hostname);
+ return -1;
+ }
+ if(from->keylength != from->cipher->key_len + from->cipher->iv_len)
+ {
+ syslog(LOG_ERR, _("Node %s (%s) uses wrong keylength!"), from->name, from->hostname);
+ return -1;
+ }
+ }
+ else
+ {
+ from->cipher = NULL;
+ }
+
+ if(digest)
+ {
+ from->digest = EVP_get_digestbynid(digest);
+ if(!from->digest)
+ {
+ syslog(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name, from->hostname);
+ return -1;
+ }
+ from->maclength = maclength;
+ if(from->maclength > from->digest->md_size || from->maclength < 0)
+ {
+ syslog(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"), from->name, from->hostname);
+ return -1;
+ }
+ }
+ else
+ {
+ from->digest = NULL;
+ from->maclength = maclength;
+ }
+
+ flush_queue(from);
+cp
+ return 0;
+}
--- /dev/null
+/*
+ protocol_misc.c -- handle the meta-protocol, miscellaneous functions
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: protocol_misc.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+
+#include "conf.h"
+#include "net.h"
+#include "netutl.h"
+#include "protocol.h"
+#include "meta.h"
+#include "connection.h"
+
+#include "system.h"
+
+/* Status and error notification routines */
+
+int send_status(connection_t *c, int statusno, char *statusstring)
+{
+cp
+ 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)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ if(debug_lvl >= DEBUG_STATUS)
+ {
+ syslog(LOG_NOTICE, _("Status message from %s (%s): %s: %s"),
+ c->name, c->hostname, status_text[statusno], statusstring);
+ }
+
+cp
+ return 0;
+}
+
+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 error_h(connection_t *c)
+{
+ int err;
+ char errorstring[MAX_STRING_SIZE];
+cp
+ if(sscanf(c->buffer, "%*d %d "MAX_STRING, &err, errorstring) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
+ c->name, c->hostname);
+ return -1;
+ }
+
+ if(debug_lvl >= DEBUG_ERROR)
+ {
+ syslog(LOG_NOTICE, _("Error message from %s (%s): %s: %s"),
+ c->name, c->hostname, strerror(err), errorstring);
+ }
+
+ terminate_connection(c, c->status.active);
+cp
+ return 0;
+}
+
+int send_termreq(connection_t *c)
+{
+cp
+ return send_request(c, "%d", TERMREQ);
+}
+
+int termreq_h(connection_t *c)
+{
+cp
+ terminate_connection(c, c->status.active);
+cp
+ return 0;
+}
+
+int send_ping(connection_t *c)
+{
+cp
+ c->status.pinged = 1;
+ c->last_ping_time = time(NULL);
+cp
+ return send_request(c, "%d", PING);
+}
+
+int ping_h(connection_t *c)
+{
+cp
+ return send_pong(c);
+}
+
+int send_pong(connection_t *c)
+{
+cp
+ return send_request(c, "%d", PONG);
+}
+
+int pong_h(connection_t *c)
+{
+cp
+ c->status.pinged = 0;
+cp
+ return 0;
+}
+
+/* Sending and receiving packets via TCP */
+
+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;
+}
+
+/* Status strings */
+
+char (*status_text[]) = {
+ "Warning",
+};
+
+/* Error strings */
+
+char (*error_text[]) = {
+ "Error",
+};
--- /dev/null
+/*
+ protocol_subnet.c -- handle the meta-protocol, subnets
+ Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000-2002 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: protocol_subnet.c,v 1.1.4.1 2002/02/11 10:05:58 guus Exp $
+*/
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+
+#include "conf.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"
+
+int send_add_subnet(connection_t *c, subnet_t *subnet)
+{
+ int x;
+ char *netstr;
+cp
+ x = send_request(c, "%d %s %s", ADD_SUBNET,
+ subnet->owner->name, netstr = net2str(subnet));
+ free(netstr);
+cp
+ return x;
+}
+
+int add_subnet_h(connection_t *c)
+{
+ 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 bad %s from %s (%s)"), "ADD_SUBNET", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if owner name is a valid */
+
+ if(check_id(name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Check if subnet string is valid */
+
+ if(!(s = str2net(subnetstr)))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid subnet string"));
+ return -1;
+ }
+
+ /* Check if the owner of the new subnet is in the connection list */
+
+ owner = lookup_node(name);
+
+ if(!owner)
+ {
+ owner = new_node();
+ owner->name = xstrdup(name);
+ node_add(owner);
+ }
+
+ /* Check if we already know this subnet */
+
+ if(lookup_subnet(owner, s))
+ {
+ free_subnet(s);
+ return 0;
+ }
+
+ /* If we don't know this subnet, but we are the owner, retaliate with a DEL_SUBNET */
+
+ if(owner == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "ADD_SUBNET", c->name, c->hostname);
+ s->owner = myself;
+ send_del_subnet(c, s);
+ return 0;
+ }
+
+ /* If everything is correct, add the subnet to the list of the owner */
+
+ subnet_add(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_add_subnet(other, s);
+ }
+cp
+ return 0;
+}
+
+int send_del_subnet(connection_t *c, subnet_t *s)
+{
+ int x;
+ char *netstr;
+cp
+ netstr = net2str(s);
+ x = send_request(c, "%d %s %s", DEL_SUBNET, s->owner->name, netstr);
+ 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) != 2)
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name, c->hostname);
+ return -1;
+ }
+
+ /* Check if owner name is a valid */
+
+ if(check_id(name))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid name"));
+ return -1;
+ }
+
+ /* Check if the owner of the new subnet is in the connection list */
+
+ if(!(owner = lookup_node(name)))
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which is not in our node tree"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return 0;
+ }
+
+ /* Check if subnet string is valid */
+
+ if(!(s = str2net(subnetstr)))
+ {
+ syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid subnet string"));
+ return -1;
+ }
+
+ /* If everything is correct, delete the subnet from the list of the owner */
+
+ s->owner = owner;
+
+ find = lookup_subnet(owner, s);
+
+ free_subnet(s);
+
+ if(!find)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which does not appear in his subnet tree"),
+ "DEL_SUBNET", c->name, c->hostname, name);
+ return 0;
+ }
+
+ /* If we are the owner of this subnet, retaliate with an ADD_SUBNET */
+
+ if(owner == myself)
+ {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "DEL_SUBNET", c->name, c->hostname);
+ send_add_subnet(c, find);
+ return 0;
+ }
+
+ /* 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, find);
+ }
+
+ /* Finally, delete it. */
+
+ subnet_del(owner, find);
+
+cp
+ return 0;
+}
projects / oweals / tinc.git / commitdiff