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- /*
- node.c -- node tree management
- Copyright (C) 2001-2016 Guus Sliepen <guus@tinc-vpn.org>,
- 2001-2005 Ivo Timmermans
- 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.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "system.h"
- #include "avl_tree.h"
- #include "logger.h"
- #include "net.h"
- #include "netutl.h"
- #include "node.h"
- #include "utils.h"
- #include "xalloc.h"
- avl_tree_t *node_tree; /* Known nodes, sorted by name */
- avl_tree_t *node_udp_tree; /* Known nodes, sorted by address and port */
- node_t *myself;
- static int node_compare(const node_t *a, const node_t *b) {
- return strcmp(a->name, b->name);
- }
- static int node_udp_compare(const node_t *a, const node_t *b) {
- return sockaddrcmp(&a->address, &b->address);
- }
- void init_nodes(void) {
- node_tree = avl_alloc_tree((avl_compare_t) node_compare, (avl_action_t) free_node);
- node_udp_tree = avl_alloc_tree((avl_compare_t) node_udp_compare, NULL);
- }
- void exit_nodes(void) {
- avl_delete_tree(node_udp_tree);
- avl_delete_tree(node_tree);
- }
- node_t *new_node(void) {
- node_t *n = xmalloc_and_zero(sizeof(*n));
- if(replaywin) {
- n->late = xmalloc_and_zero(replaywin);
- }
- n->subnet_tree = new_subnet_tree();
- n->edge_tree = new_edge_tree();
- n->inctx = EVP_CIPHER_CTX_new();
- n->outctx = EVP_CIPHER_CTX_new();
- if(!n->inctx || !n->outctx) {
- abort();
- }
- n->mtu = MTU;
- n->maxmtu = MTU;
- return n;
- }
- void free_node(node_t *n) {
- if(n->inkey) {
- free(n->inkey);
- }
- if(n->outkey) {
- free(n->outkey);
- }
- if(n->subnet_tree) {
- free_subnet_tree(n->subnet_tree);
- }
- if(n->edge_tree) {
- free_edge_tree(n->edge_tree);
- }
- sockaddrfree(&n->address);
- EVP_CIPHER_CTX_free(n->outctx);
- EVP_CIPHER_CTX_free(n->inctx);
- if(n->mtuevent) {
- event_del(n->mtuevent);
- }
- if(n->hostname) {
- free(n->hostname);
- }
- if(n->name) {
- free(n->name);
- }
- if(n->late) {
- free(n->late);
- }
- free(n);
- }
- void node_add(node_t *n) {
- avl_insert(node_tree, n);
- }
- void node_del(node_t *n) {
- avl_node_t *node, *next;
- edge_t *e;
- subnet_t *s;
- for(node = n->subnet_tree->head; node; node = next) {
- next = node->next;
- s = node->data;
- subnet_del(n, s);
- }
- for(node = n->edge_tree->head; node; node = next) {
- next = node->next;
- e = node->data;
- edge_del(e);
- }
- avl_delete(node_udp_tree, n);
- avl_delete(node_tree, n);
- }
- node_t *lookup_node(char *name) {
- node_t n = {0};
- n.name = name;
- return avl_search(node_tree, &n);
- }
- node_t *lookup_node_udp(const sockaddr_t *sa) {
- node_t n = {0};
- n.address = *sa;
- n.name = NULL;
- return avl_search(node_udp_tree, &n);
- }
- void update_node_udp(node_t *n, const sockaddr_t *sa) {
- if(n == myself) {
- logger(LOG_WARNING, "Trying to update UDP address of myself!");
- return;
- }
- avl_delete(node_udp_tree, n);
- if(n->hostname) {
- free(n->hostname);
- }
- if(sa) {
- n->address = *sa;
- n->hostname = sockaddr2hostname(&n->address);
- avl_insert(node_udp_tree, n);
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
- } else {
- memset(&n->address, 0, sizeof(n->address));
- n->hostname = NULL;
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
- }
- }
- void dump_nodes(void) {
- avl_node_t *node;
- node_t *n;
- logger(LOG_DEBUG, "Nodes:");
- for(node = node_tree->head; node; node = node->next) {
- n = node->data;
- logger(LOG_DEBUG, " %s at %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s pmtu %d (min %d max %d)",
- n->name, n->hostname, n->outcipher ? EVP_CIPHER_nid(n->outcipher) : 0,
- n->outdigest ? EVP_MD_type(n->outdigest) : 0, n->outmaclength, n->outcompression,
- n->options, bitfield_to_int(&n->status, sizeof(n->status)), n->nexthop ? n->nexthop->name : "-",
- n->via ? n->via->name : "-", n->mtu, n->minmtu, n->maxmtu);
- }
- logger(LOG_DEBUG, "End of nodes.");
- }
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