X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_edge.c;h=300333b6b42b9567bbc21f4d21c903267982616d;hp=7a04f082ea83de241bdedd45c38c619c4d117a91;hb=5cbddc68bade0d1f8ded1b784bb27bb44c5dc5dc;hpb=5fc1ed17f41f0c535cf57a4b7e00cd6d45759503 diff --git a/src/protocol_edge.c b/src/protocol_edge.c index 7a04f082..300333b6 100644 --- a/src/protocol_edge.c +++ b/src/protocol_edge.c @@ -1,7 +1,8 @@ /* protocol_edge.c -- handle the meta-protocol, edges - Copyright (C) 1999-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2009 Guus Sliepen + 2009 Michael Tokarev 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 @@ -13,257 +14,248 @@ 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 1.1.4.11 2002/09/09 19:40:04 guus Exp $ + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "config.h" - -#include -#include -#include -#include -#include -#include - -#include -#include -#include +#include "system.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 "logger.h" +#include "meta.h" +#include "net.h" +#include "netutl.h" +#include "node.h" +#include "protocol.h" +#include "utils.h" +#include "xalloc.h" -#include "system.h" +bool send_add_edge(connection_t *c, const edge_t *e) { + bool x; + char *address, *port; -int send_add_edge(connection_t *c, edge_t *e) -{ - int x; - char *address, *port; - cp(); - sockaddr2str(&e->address, &address, &port); - x = send_request(c, "%d %lx %s %s %s %s %lx %d", ADD_EDGE, random(), - e->from->name, e->to->name, address, port, - e->options, e->weight); - free(address); - free(port); - cp(); - return x; + sockaddr2str(&e->address, &address, &port); + + x = send_request(c, "%d %x %s %s %s %s %x %d", ADD_EDGE, rand(), + e->from->name, e->to->name, address, port, + e->options, e->weight); + free(address); + free(port); + + return x; } -int add_edge_h(connection_t *c) -{ - edge_t *e; - node_t *from, *to; - char from_name[MAX_STRING_SIZE]; - char to_name[MAX_STRING_SIZE]; - char to_address[MAX_STRING_SIZE]; - char to_port[MAX_STRING_SIZE]; - sockaddr_t address; - long int options; - int weight; - cp(); - if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %lx %d", - from_name, to_name, to_address, to_port, &options, &weight) != 6) - { - 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; - } - - if(seen_request(c->buffer)) - return 0; - - /* 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 */ - - address = str2sockaddr(to_address, to_port); - - /* Check if edge already exists */ - - e = lookup_edge(from, to); - - if(e) - { - if(e->weight != weight || e->options != options || sockaddrcmp(&e->address, &address)) - { - if(from == 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) - { - 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 = from; - e->to = to; - send_del_edge(c, e); - free_edge(e); - return 0; - } - - e = new_edge(); - e->from = from; - e->to = to; - e->address = address; - e->options = options; - e->weight = weight; - edge_add(e); - - /* Tell the rest about the new edge */ - - forward_request(c); - - /* Run MST before or after we tell the rest? */ - - graph(); - cp(); - return 0; +bool add_edge_h(connection_t *c) { + edge_t *e; + node_t *from, *to; + char from_name[MAX_STRING_SIZE]; + char to_name[MAX_STRING_SIZE]; + char to_address[MAX_STRING_SIZE]; + char to_port[MAX_STRING_SIZE]; + sockaddr_t address; + uint32_t options; + int weight; + + if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %x %d", + from_name, to_name, to_address, to_port, &options, &weight) != 6) { + logger(LOG_ERR, "Got bad %s from %s (%s)", "ADD_EDGE", c->name, + c->hostname); + return false; + } + + /* Check if names are valid */ + + if(!check_id(from_name) || !check_id(to_name)) { + logger(LOG_ERR, "Got bad %s from %s (%s): %s", "ADD_EDGE", c->name, + c->hostname, "invalid name"); + return false; + } + + if(seen_request(c->buffer)) + return true; + + /* Lookup nodes */ + + from = lookup_node(from_name); + to = lookup_node(to_name); + + if(tunnelserver && + from != myself && from != c->node && + to != myself && to != c->node) { + /* ignore indirect edge registrations for tunnelserver */ + ifdebug(PROTOCOL) logger(LOG_WARNING, + "Ignoring indirect %s from %s (%s)", + "ADD_EDGE", c->name, c->hostname); + return true; + } + + if(!from) { + from = new_node(); + from->name = xstrdup(from_name); + node_add(from); + } + + if(!to) { + to = new_node(); + to->name = xstrdup(to_name); + node_add(to); + } + + + /* Convert addresses */ + + address = str2sockaddr(to_address, to_port); + + /* Check if edge already exists */ + + e = lookup_edge(from, to); + + if(e) { + if(e->weight != weight || e->options != options || sockaddrcmp(&e->address, &address)) { + if(from == myself) { + ifdebug(PROTOCOL) logger(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 true; + } else { + ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) which does not match existing entry", + "ADD_EDGE", c->name, c->hostname); + edge_del(e); + graph(); + } + } else + return true; + } else if(from == myself) { + ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for ourself which does not exist", + "ADD_EDGE", c->name, c->hostname); + e = new_edge(); + e->from = from; + e->to = to; + send_del_edge(c, e); + free_edge(e); + return true; + } + + e = new_edge(); + e->from = from; + e->to = to; + e->address = address; + e->options = options; + e->weight = weight; + edge_add(e); + + /* Tell the rest about the new edge */ + + if(!tunnelserver) + forward_request(c); + + /* Run MST before or after we tell the rest? */ + + graph(); + + return true; } -int send_del_edge(connection_t *c, edge_t *e) -{ - cp(); - return send_request(c, "%d %lx %s %s", DEL_EDGE, random(), - e->from->name, e->to->name); +bool send_del_edge(connection_t *c, const edge_t *e) { + return send_request(c, "%d %x %s %s", DEL_EDGE, rand(), + e->from->name, e->to->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; - cp(); - if(sscanf(c->buffer, "%*d %*x "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; - } - - if(seen_request(c->buffer)) - return 0; - - /* 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 == 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 */ - - forward_request(c); - - /* Delete the edge */ - - edge_del(e); - - /* Run MST before or after we tell the rest? */ - - graph(); - cp(); - return 0; +bool 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; + + if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, from_name, to_name) != 2) { + logger(LOG_ERR, "Got bad %s from %s (%s)", "DEL_EDGE", c->name, + c->hostname); + return false; + } + + /* Check if names are valid */ + + if(!check_id(from_name) || !check_id(to_name)) { + logger(LOG_ERR, "Got bad %s from %s (%s): %s", "DEL_EDGE", c->name, + c->hostname, "invalid name"); + return false; + } + + if(seen_request(c->buffer)) + return true; + + /* Lookup nodes */ + + from = lookup_node(from_name); + to = lookup_node(to_name); + + if(tunnelserver && + from != myself && from != c->node && + to != myself && to != c->node) { + /* ignore indirect edge registrations for tunnelserver */ + ifdebug(PROTOCOL) logger(LOG_WARNING, + "Ignoring indirect %s from %s (%s)", + "DEL_EDGE", c->name, c->hostname); + return true; + } + + if(!from) { + ifdebug(PROTOCOL) logger(LOG_ERR, "Got %s from %s (%s) which does not appear in the edge tree", + "DEL_EDGE", c->name, c->hostname); + return true; + } + + if(!to) { + ifdebug(PROTOCOL) logger(LOG_ERR, "Got %s from %s (%s) which does not appear in the edge tree", + "DEL_EDGE", c->name, c->hostname); + return true; + } + + /* Check if edge exists */ + + e = lookup_edge(from, to); + + if(!e) { + ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) which does not appear in the edge tree", + "DEL_EDGE", c->name, c->hostname); + return true; + } + + if(e->from == myself) { + ifdebug(PROTOCOL) logger(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 true; + } + + /* Tell the rest about the deleted edge */ + + if(!tunnelserver) + forward_request(c); + + /* Delete the edge */ + + edge_del(e); + + /* Run MST before or after we tell the rest? */ + + graph(); + + /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */ + + if(!to->status.reachable) { + e = lookup_edge(to, myself); + if(e) { + if(!tunnelserver) + send_del_edge(broadcast, e); + edge_del(e); + } + } + + return true; }