+++ /dev/null
-/*
- protocol_node.c -- handle the meta-protocol, nodes
- Copyright (C) 1999-2002 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
-
- 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_node.c,v 1.1.4.9 2002/09/09 22:33:08 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 "system.h"
-
-int send_add_node(connection_t *c, node_t *n)
-{
- int x;
- char *address, *port;
- cp();
- if(!n->status.reachable)
- return 0;
-
- sockaddr2str(&n->address, &address, &port);
- x = send_request(c, "%d %s %s %s %lx %d %s %s", ADD_NODE, n->name, address, port, n->options, n->distance + 1, // Alternatively, use n->distance + c->estimated_weight
- n->prevhop->name, n->via->name);
- free(address);
- free(port);
- cp();
- return x;
-}
-
-int add_node_h(connection_t *c)
-{
- connection_t *other;
- node_t *n, *prevhop, *via;
- char name[MAX_STRING_SIZE];
- char address[MAX_STRING_SIZE];
- char port[MAX_STRING_SIZE];
- char prevhopname[MAX_STRING_SIZE];
- char vianame[MAX_STRING_SIZE];
- long int options;
- int distance;
- avl_node_t *node;
- cp();
- if(sscanf
- (c->buffer,
- "%*d " MAX_STRING " " MAX_STRING " " MAX_STRING " %lx %d " MAX_STRING
- " " MAX_STRING, name, address, port, &options, &distance, prevhopname,
- vianame) != 7) {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_NODE", c->name,
- c->hostname);
- return -1;
- }
-
- /* Check if names are valid */
-
- if(check_id(name)) {
- syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_NODE", c->name,
- c->hostname, _("invalid name"));
- return -1;
- }
-
- /* This node is indirect if it's nexthop is as well */
-
- if(c->node->options & OPTION_INDIRECT)
- options |= OPTION_INDIRECT;
-
- /* Lookup nodes */
-
- prevhop = lookup_node(prevhopname);
-
- if(!prevhop) {
- prevhop = new_node();
- prevhop->name = xstrdup(prevhopname);
- node_add(prevhop);
- }
-
- via = lookup_node(vianame);
-
- if(!via) {
- via = new_node();
- via->name = xstrdup(vianame);
- node_add(via);
- }
-
- n = lookup_node(name);
-
- if(!n) {
- // It's a new node. Add it and tell the others.
- n = new_node();
- n->name = xstrdup(name);
- n->address = str2sockaddr(address, port);
- n->hostname = sockaddr2hostname(&n->address);
- n->options = options;
- n->distance = distance;
- n->nexthop = c->node;
- n->prevhop = prevhop;
- n->via = via;
- node_add(n);
- if(prevhop == myself) {
- syslog(LOG_WARNING,
- _
- ("Got ADD_NODE %s prevhop %s via %s from %s, sending back a DEL_NODE!"),
- name, prevhopname, vianame, c->name);
- // send_del_node(c, n);
- return 0;
- }
- n->status.reachable = 1;
- } else {
- // If this ADD_NODE is closer or more direct, use it instead of the old one.
- if(!n->status.reachable
- || ((n->options & OPTION_INDIRECT) && !(options & OPTION_INDIRECT))
- || n->distance > distance) {
- if(prevhop == myself) {
- syslog(LOG_WARNING,
- _("Got ADD_NODE %s prevhop %s via %s from %s!"), name,
- prevhopname, vianame, c->name);
- // send_del_node(c, n);
- return 0;
- }
- node = avl_unlink(node_udp_tree, n);
- n->address = str2sockaddr(address, port);
- avl_insert_node(node_udp_tree, node);
- if(n->hostname)
- free(n->hostname);
- n->hostname = sockaddr2hostname(&n->address);
- n->options = options;
- n->distance = distance;
- n->via = n->nexthop = c->node;
- n->status.reachable = 1;
- n->status.validkey = 0;
- n->status.waitingforkey = 0;
- } else
- // Otherwise, just ignore it.
- return 0;
- }
-
- /* Tell the rest about the new node */
-
- 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);
- }
-
- cp();
- return 0;
-}
-
-int send_del_node(connection_t *c, node_t *n)
-{
- cp();
- return send_request(c, "%d %s %s", DEL_NODE, n->name, n->prevhop->name);
-}
-
-int del_node_h(connection_t *c)
-{
- char name[MAX_STRING_SIZE];
- char prevhopname[MAX_STRING_SIZE];
- node_t *n, *prevhop;
- connection_t *other;
- avl_node_t *node;
- cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING " " MAX_STRING, name, prevhopname) !=
- 2) {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_NODE", c->name,
- c->hostname);
- return -1;
- }
-
- /* Check if names are valid */
-
- if(check_id(name)) {
- syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_NODE", c->name,
- c->hostname, _("invalid name"));
- return -1;
- }
-
- /* Lookup nodes */
-
- n = lookup_node(name);
- prevhop = lookup_node(prevhopname);
-
- if(!n || !prevhop) {
- if(debug_lvl >= DEBUG_PROTOCOL)
- syslog(LOG_WARNING,
- _
- ("Got %s from %s (%s) which does not appear in the node tree"),
- "DEL_NODE", c->name, c->hostname);
- return 0;
- }
-
- /* If we got a DEL_NODE but we know of a different route to it, tell the one who send the DEL_NODE */
-
- if(n->nexthop != c->node) {
- return send_add_node(c, n);
- }
-
- /* Otherwise, tell the rest about the deleted node */
-
- 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 */
-
- n->status.reachable = 0;
- n->status.validkey = 0;
- cp();
- return 0;
-}
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