X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_edge.c;h=e048703fdd62baec5687d3b3e1d019ac0b5c243f;hp=75b49950dcd2632fb8d8e3c27e7225c37fe5b0d2;hb=e4670fc4a0576eb76f1807ce29fa9455dd247632;hpb=e449d94caef963809d417f16497f6f978e10d731 diff --git a/src/protocol_edge.c b/src/protocol_edge.c index 75b49950..e048703f 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) 1999-2003 Ivo Timmermans , - 2000-2003 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2012 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 @@ -13,11 +14,9 @@ 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 1.1.4.18 2003/07/17 15:06:26 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 "system.h" @@ -36,16 +35,13 @@ #include "utils.h" #include "xalloc.h" -int send_add_edge(connection_t *c, edge_t *e) -{ - int x; +bool send_add_edge(connection_t *c, const edge_t *e) { + bool 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(), + 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); @@ -54,8 +50,7 @@ int send_add_edge(connection_t *c, edge_t *e) return x; } -int add_edge_h(connection_t *c) -{ +bool add_edge_h(connection_t *c) { edge_t *e; node_t *from, *to; char from_name[MAX_STRING_SIZE]; @@ -63,38 +58,41 @@ int add_edge_h(connection_t *c) char to_address[MAX_STRING_SIZE]; char to_port[MAX_STRING_SIZE]; sockaddr_t address; - long int options; + uint32_t options; int weight; - cp(); - - if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %lx %d", + 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, + logger(LOG_ERR, "Got bad %s from %s (%s)", "ADD_EDGE", c->name, c->hostname); - return -1; + return false; } /* Check if names are valid */ - if(check_id(from_name)) { - logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, - c->hostname, _("invalid name")); - return -1; - } - - if(check_id(to_name)) { - logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name, - c->hostname, _("invalid name")); - return -1; + 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 0; + 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(); @@ -102,14 +100,13 @@ int add_edge_h(connection_t *c) 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); @@ -121,27 +118,39 @@ int add_edge_h(connection_t *c) 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"), + 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 0; + return true; } else { - ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) which does not match existing entry"), + 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); + e->options = options; + if(sockaddrcmp(&e->address, &address)) { + sockaddrfree(&e->address); + e->address = address; + } + if(e->weight != weight) { + avl_node_t *node = avl_unlink(edge_weight_tree, e); + e->weight = weight; + avl_insert_node(edge_weight_tree, node); + } + graph(); + return true; } } else - return 0; + return true; } else if(from == myself) { - ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself which does not exist"), + ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for ourself which does not exist", "ADD_EDGE", c->name, c->hostname); + contradicting_add_edge++; e = new_edge(); e->from = from; e->to = to; send_del_edge(c, e); free_edge(e); - return 0; + return true; } e = new_edge(); @@ -154,71 +163,69 @@ int add_edge_h(connection_t *c) /* Tell the rest about the new edge */ - forward_request(c); + if(!tunnelserver) + forward_request(c); /* Run MST before or after we tell the rest? */ graph(); - return 0; + return true; } -int send_del_edge(connection_t *c, edge_t *e) -{ - cp(); - - return send_request(c, "%d %lx %s %s", DEL_EDGE, random(), +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) -{ +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; - cp(); - 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, + logger(LOG_ERR, "Got bad %s from %s (%s)", "DEL_EDGE", c->name, c->hostname); - return -1; + return false; } /* Check if names are valid */ - if(check_id(from_name)) { - logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, - c->hostname, _("invalid name")); - return -1; - } - - if(check_id(to_name)) { - logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name, - c->hostname, _("invalid name")); - return -1; + 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 0; + 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"), + 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 0; + return true; } - to = lookup_node(to_name); - if(!to) { - ifdebug(PROTOCOL) logger(LOG_ERR, _("Got %s from %s (%s) which does not appear in the edge tree"), + 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 0; + return true; } /* Check if edge exists */ @@ -226,21 +233,23 @@ int del_edge_h(connection_t *c) 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"), + 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 0; + return true; } if(e->from == myself) { - ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself"), + ifdebug(PROTOCOL) logger(LOG_WARNING, "Got %s from %s (%s) for ourself", "DEL_EDGE", c->name, c->hostname); + contradicting_del_edge++; send_add_edge(c, e); /* Send back a correction */ - return 0; + return true; } /* Tell the rest about the deleted edge */ - forward_request(c); + if(!tunnelserver) + forward_request(c); /* Delete the edge */ @@ -250,5 +259,16 @@ int del_edge_h(connection_t *c) graph(); - return 0; + /* 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(everyone, e); + edge_del(e); + } + } + + return true; }