X-Git-Url: http://git.meshlink.io/?p=meshlink;a=blobdiff_plain;f=src%2Fnode.c;h=b8caed6c7e06ca182f671fd046f8be4d44d76611;hp=2ef28b59ba525a53681de93ba6f1ca6cd2ed37f8;hb=963c5055505f2fc117cd5efa06eaa02c9b2bf85d;hpb=7ea85043ac1fb2096baea44f6b0af27ac0d0b2cf

diff --git a/src/node.c b/src/node.c
index 2ef28b59..b8caed6c 100644
--- a/src/node.c
+++ b/src/node.c
@@ -1,7 +1,6 @@
 /*
     node.c -- node tree management
-    Copyright (C) 2001-2009 Guus Sliepen <guus@tinc-vpn.org>,
-                  2001-2005 Ivo Timmermans
+    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>,
 
     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
@@ -20,153 +19,157 @@
 
 #include "system.h"
 
-#include "splay_tree.h"
+#include "hash.h"
 #include "logger.h"
+#include "meshlink_internal.h"
 #include "net.h"
 #include "netutl.h"
 #include "node.h"
+#include "splay_tree.h"
 #include "utils.h"
 #include "xalloc.h"
 
-splay_tree_t *node_tree;			/* Known nodes, sorted by name */
-splay_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) {
-	int result;
-
-	result = sockaddrcmp(&a->address, &b->address);
-
-	if(result)
-		return result;
-
-	return (a->name && b->name) ? strcmp(a->name, b->name) : 0;
+void init_nodes(meshlink_handle_t *mesh) {
+	mesh->nodes = splay_alloc_tree((splay_compare_t) node_compare, (splay_action_t) free_node);
+	mesh->node_udp_cache = hash_alloc(0x100, sizeof(sockaddr_t));
 }
 
-void init_nodes(void) {
-	node_tree = splay_alloc_tree((splay_compare_t) node_compare, (splay_action_t) free_node);
-	node_udp_tree = splay_alloc_tree((splay_compare_t) node_udp_compare, NULL);
-}
+void exit_nodes(meshlink_handle_t *mesh) {
+	if(mesh->node_udp_cache) {
+		hash_free(mesh->node_udp_cache);
+	}
+
+	if(mesh->nodes) {
+		splay_delete_tree(mesh->nodes);
+	}
 
-void exit_nodes(void) {
-	splay_delete_tree(node_udp_tree);
-	splay_delete_tree(node_tree);
+	mesh->node_udp_cache = NULL;
+	mesh->nodes = NULL;
 }
 
 node_t *new_node(void) {
-	node_t *n = xmalloc_and_zero(sizeof *n);
+	node_t *n = xzalloc(sizeof(*n));
 
-	n->subnet_tree = new_subnet_tree();
 	n->edge_tree = new_edge_tree();
 	n->mtu = MTU;
 	n->maxmtu = MTU;
+	n->devclass = DEV_CLASS_UNKNOWN;
 
 	return n;
 }
 
 void free_node(node_t *n) {
-	if(n->subnet_tree)
-		free_subnet_tree(n->subnet_tree);
+	n->status.destroyed = true;
 
-	if(n->edge_tree)
+	utcp_exit(n->utcp);
+
+	if(n->edge_tree) {
 		free_edge_tree(n->edge_tree);
+	}
 
 	sockaddrfree(&n->address);
 
-	cipher_close(&n->incipher);
-	digest_close(&n->indigest);
-	cipher_close(&n->outcipher);
-	digest_close(&n->outdigest);
+	ecdsa_free(n->ecdsa);
+	sptps_stop(&n->sptps);
 
-	event_del(&n->mtuevent);
-	
-	if(n->hostname)
-		free(n->hostname);
+	if(n->mtutimeout.cb) {
+		abort();
+	}
 
-	if(n->name)
-		free(n->name);
+	free(n->name);
+	free(n->canonical_address);
 
 	free(n);
 }
 
-void node_add(node_t *n) {
-	splay_insert(node_tree, n);
+void node_add(meshlink_handle_t *mesh, node_t *n) {
+	n->mesh = mesh;
+	splay_insert(mesh->nodes, n);
 }
 
-void node_del(node_t *n) {
-	splay_node_t *node, *next;
-	edge_t *e;
-	subnet_t *s;
+void node_del(meshlink_handle_t *mesh, node_t *n) {
+	timeout_del(&mesh->loop, &n->mtutimeout);
 
-	for(node = n->subnet_tree->head; node; node = next) {
-		next = node->next;
-		s = node->data;
-		subnet_del(n, s);
+	for splay_each(edge_t, e, n->edge_tree) {
+		edge_del(mesh, e);
 	}
 
-	for(node = n->edge_tree->head; node; node = next) {
-		next = node->next;
-		e = node->data;
-		edge_del(e);
-	}
-
-	splay_delete(node_udp_tree, n);
-	splay_delete(node_tree, n);
+	splay_delete(mesh->nodes, n);
 }
 
-node_t *lookup_node(char *name) {
-	node_t n = {0};
+node_t *lookup_node(meshlink_handle_t *mesh, const char *name) {
+	const node_t n = {.name = (char *)name};
+	node_t *result;
 
-	n.name = name;
+	result = splay_search(mesh->nodes, &n);
 
-	return splay_search(node_tree, &n);
+	return result;
 }
 
-node_t *lookup_node_udp(const sockaddr_t *sa) {
-	node_t n = {0};
-
-	n.address = *sa;
-	n.name = NULL;
-
-	return splay_search(node_udp_tree, &n);
+node_t *lookup_node_udp(meshlink_handle_t *mesh, const sockaddr_t *sa) {
+	return hash_search(mesh->node_udp_cache, sa);
 }
 
-void update_node_udp(node_t *n, const sockaddr_t *sa) {
-	splay_delete(node_udp_tree, n);
+void update_node_udp(meshlink_handle_t *mesh, node_t *n, const sockaddr_t *sa) {
+	if(n == mesh->self) {
+		logger(mesh, MESHLINK_WARNING, "Trying to update UDP address of mesh->self!");
+		return;
+	}
 
-	if(n->hostname)
-		free(n->hostname);
+	hash_insert(mesh->node_udp_cache, &n->address, NULL);
 
 	if(sa) {
 		n->address = *sa;
-		n->hostname = sockaddr2hostname(&n->address);
-		splay_insert(node_udp_tree, n);
-		logger(LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
-	} else {
-		memset(&n->address, 0, sizeof n->address);
-		n->hostname = 0;
-		ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
+		n->sock = 0;
+
+		for(int i = 0; i < mesh->listen_sockets; i++) {
+			if(mesh->listen_socket[i].sa.sa.sa_family == sa->sa.sa_family) {
+				n->sock = i;
+				break;
+			}
+		}
+
+		hash_insert(mesh->node_udp_cache, sa, n);
+
+		node_add_recent_address(mesh, n, sa);
+
+		if(mesh->log_level <= MESHLINK_DEBUG) {
+			char *hostname = sockaddr2hostname(&n->address);
+			logger(mesh, MESHLINK_DEBUG, "UDP address of %s set to %s", n->name, hostname);
+			free(hostname);
+		}
 	}
 }
 
-int dump_nodes(struct evbuffer *out) {
-	splay_node_t *node;
-	node_t *n;
-
-	for(node = node_tree->head; node; node = node->next) {
-		n = node->data;
-		if(evbuffer_add_printf(out, " %s at %s cipher %d digest %d maclength %d compression %d options %lx status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)\n",
-			   n->name, n->hostname, cipher_get_nid(&n->outcipher),
-			   digest_get_nid(&n->outdigest), digest_length(&n->outdigest), n->outcompression,
-			   n->options, bitfield_to_int(&n->status, sizeof n->status), n->nexthop ? n->nexthop->name : "-",
-			   n->via ? n->via->name : "-", n->distance, n->mtu, n->minmtu, n->maxmtu) == -1)
-			return errno;
+bool node_add_recent_address(meshlink_handle_t *mesh, node_t *n, const sockaddr_t *sa) {
+	(void)mesh;
+	bool found = false;
+	int i;
+
+	/* Check if we already know this address */
+	for(i = 0; i < MAX_RECENT && n->recent[i].sa.sa_family; i++) {
+		if(!sockaddrcmp(&n->recent[i], sa)) {
+			found = true;
+			break;
+		}
+	}
+
+	if(found && i == 0) {
+		/* It's already the most recent address, nothing to do. */
+		return false;
 	}
 
-	return 0;
+	if(i >= MAX_RECENT) {
+		i = MAX_RECENT - 1;
+	}
+
+	memmove(n->recent + 1, n->recent, i * sizeof(*n->recent));
+	memcpy(n->recent, sa, SALEN(sa->sa));
+
+	n->status.dirty = true;
+	return !found;
 }