/*
protocol_edge.c -- handle the meta-protocol, edges
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
2009 Michael Tokarev <mjt@corpit.ru>
This program is free software; you can redistribute it and/or modify
#include "system.h"
-#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
#include "edge.h"
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);
+ if(e->local_address.sa.sa_family) {
+ char *local_address, *local_port;
+ sockaddr2str(&e->local_address, &local_address, &local_port);
+
+ x = send_request(c, "%d %x %s %s %s %s %x %d %s %s", ADD_EDGE, rand(),
+ e->from->name, e->to->name, address, port,
+ e->options, e->weight, local_address, local_port);
+ free(local_address);
+ free(local_port);
+ } else {
+ 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;
}
-bool add_edge_h(connection_t *c, char *request) {
+bool add_edge_h(connection_t *c, const char *request) {
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;
+ char address_local[MAX_STRING_SIZE];
+ char port_local[MAX_STRING_SIZE];
+ sockaddr_t address, local_address = {{0}};
uint32_t options;
int weight;
- if(sscanf(request, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %x %d",
- from_name, to_name, to_address, to_port, &options, &weight) != 6) {
+ int parameter_count = sscanf(request, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %x %d "MAX_STRING" "MAX_STRING,
+ from_name, to_name, to_address, to_port, &options, &weight, address_local, port_local);
+ if (parameter_count != 6 && parameter_count != 8) {
logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ADD_EDGE", c->name,
c->hostname);
return false;
/* Convert addresses */
address = str2sockaddr(to_address, to_port);
+ if(parameter_count >= 8)
+ local_address = str2sockaddr(address_local, port_local);
/* Check if edge already exists */
logger(DEBUG_PROTOCOL, 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);
+ sockaddrfree(&local_address);
return true;
} else {
logger(DEBUG_PROTOCOL, 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 if(sockaddrcmp(&e->local_address, &local_address)) {
+ if(from == myself) {
+ if(e->local_address.sa.sa_family && local_address.sa.sa_family) {
+ // Someone has the wrong local address for ourself. Correct then.
+ logger(DEBUG_PROTOCOL, 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);
+ sockaddrfree(&local_address);
+ return true;
+ }
+ // Otherwise, just ignore it.
+ sockaddrfree(&local_address);
+ return true;
+ } else if(local_address.sa.sa_family && local_address.sa.sa_family != AF_UNKNOWN) {
+ // We learned a new local address for this edge.
+ // local_address.sa.sa_family will be 0 if we got it from older tinc versions
+ // local_address.sa.sa_family will be 255 (AF_UNKNOWN) if we got it from newer versions
+ // but for edge which does not have local_address
+ sockaddrfree(&e->local_address);
+ e->local_address = local_address;
+
+ // Tell others about it.
+ if(!tunnelserver)
+ forward_request(c, request);
+
+ return true;
+ } else {
+ sockaddrfree(&local_address);
+ return true;
}
- } else
+ } else {
+ sockaddrfree(&local_address);
return true;
+ }
} else if(from == myself) {
logger(DEBUG_PROTOCOL, LOG_WARNING, "Got %s from %s (%s) for ourself which does not exist",
"ADD_EDGE", c->name, c->hostname);
e->to = to;
send_del_edge(c, e);
free_edge(e);
+ sockaddrfree(&local_address);
return true;
}
e->from = from;
e->to = to;
e->address = address;
+ e->local_address = local_address;
e->options = options;
e->weight = weight;
edge_add(e);
e->from->name, e->to->name);
}
-bool del_edge_h(connection_t *c, char *request) {
+bool del_edge_h(connection_t *c, const char *request) {
edge_t *e;
char from_name[MAX_STRING_SIZE];
char to_name[MAX_STRING_SIZE];
logger(DEBUG_PROTOCOL, 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 */
+ send_add_edge(c, e); /* Send back a correction */
return true;
}
projects / tinc / blobdiff