X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet_setup.c;h=8baff8b87c9f9f9e623470e6f03b72dd6480f37c;hb=be83b0af60449c7b35d17d97f2e6dc12f611e831;hp=68b8ed7499d92209573e5aeb582bc991e753b0d4;hpb=7837be7f1513ebeb723298625ce9814d697f1c80;p=meshlink

diff --git a/src/net_setup.c b/src/net_setup.c
index 68b8ed74..8baff8b8 100644
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -1,6 +1,6 @@
 /*
     net_setup.c -- Setup.
-    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
+    Copyright (C) 2014-2017 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
@@ -27,213 +27,276 @@
 #include "meshlink_internal.h"
 #include "net.h"
 #include "netutl.h"
+#include "packmsg.h"
 #include "protocol.h"
 #include "route.h"
 #include "utils.h"
 #include "xalloc.h"
+#include "submesh.h"
 
-int autoconnect = 3;
+/// Helper function to start parsing a host config file
+static bool node_get_config(meshlink_handle_t *mesh, node_t *n, config_t *config, packmsg_input_t *in) {
+	if(!config_read(mesh, "current", n->name, config, mesh->config_key)) {
+		return false;
+	}
 
-bool node_read_ecdsa_public_key(meshlink_handle_t *mesh, node_t *n) {
-	if(ecdsa_active(n->ecdsa))
-		return true;
+	in->ptr = config->buf;
+	in->len = config->len;
 
-	splay_tree_t *config_tree;
-	char *p;
+	uint32_t version = packmsg_get_uint32(in);
 
-	init_configuration(&config_tree);
-	if(!read_host_config(mesh, config_tree, n->name))
-		goto exit;
+	if(version != MESHLINK_CONFIG_VERSION) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(config);
+		return false;
+	}
 
-	/* First, check for simple ECDSAPublicKey statement */
+	const char *name;
+	uint32_t len = packmsg_get_str_raw(in, &name);
 
-	if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
-		n->ecdsa = ecdsa_set_base64_public_key(p);
-		free(p);
+	if(len != strlen(n->name) || !name || strncmp(name, n->name, len)) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(config);
+		return false;
 	}
 
-exit:
-	exit_configuration(&config_tree);
-	return n->ecdsa;
+	return true;
 }
 
-bool read_ecdsa_public_key(meshlink_handle_t *mesh, connection_t *c) {
-	if(ecdsa_active(c->ecdsa))
+/// Read the public key from a host config file. Used whenever we need to start an SPTPS session.
+bool node_read_public_key(meshlink_handle_t *mesh, node_t *n) {
+	if(ecdsa_active(n->ecdsa)) {
 		return true;
-
-	char *p;
-
-	if(!c->config_tree) {
-		init_configuration(&c->config_tree);
-		if(!read_host_config(mesh, c->config_tree, c->name))
-			return false;
 	}
 
-	/* First, check for simple ECDSAPublicKey statement */
+	config_t config;
+	packmsg_input_t in;
 
-	if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
-		c->ecdsa = ecdsa_set_base64_public_key(p);
-		free(p);
-		return c->ecdsa;
+	if(!node_get_config(mesh, n, &config, &in)) {
+		return false;
 	}
 
-	return false;
-}
-
-bool read_ecdsa_private_key(meshlink_handle_t *mesh) {
-	FILE *fp;
-	char filename[PATH_MAX];
+	packmsg_skip_element(&in); /* submesh */
+	packmsg_get_int32(&in); /* devclass */
+	packmsg_get_bool(&in); /* blacklisted */
 
-	snprintf(filename,PATH_MAX, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
-	fp = fopen(filename, "r");
+	const void *key;
+	uint32_t len = packmsg_get_bin_raw(&in, &key);
 
-	if(!fp) {
-		logger(mesh, MESHLINK_ERROR, "Error reading ECDSA private key file: %s", strerror(errno));
+	if(len != 32) {
+		config_free(&config);
 		return false;
 	}
 
-	mesh->self->connection->ecdsa = ecdsa_read_pem_private_key(fp);
-	fclose(fp);
+	n->ecdsa = ecdsa_set_public_key(key);
 
-	if(!mesh->self->connection->ecdsa)
-		logger(mesh, MESHLINK_ERROR, "Reading ECDSA private key file failed: %s", strerror(errno));
+	// While we are at it, read known address information
+	if(!n->canonical_address) {
+		n->canonical_address = packmsg_get_str_dup(&in);
+	} else {
+		packmsg_skip_element(&in);
+	}
 
-	return mesh->self->connection->ecdsa;
-}
+	// Append any known addresses in the config file to the list we currently have
+	uint32_t known_count = 0;
 
-static bool read_invitation_key(meshlink_handle_t *mesh) {
-	FILE *fp;
-	char filename[PATH_MAX];
+	for(uint32_t i = 0; i < MAX_RECENT; i++) {
+		if(n->recent[i].sa.sa_family) {
+			known_count++;
+		}
+	}
+
+	uint32_t count = packmsg_get_array(&in);
 
-	if(mesh->invitation_key) {
-		ecdsa_free(mesh->invitation_key);
-		mesh->invitation_key = NULL;
+	for(uint32_t i = 0; i < count; i++) {
+		if(i < MAX_RECENT - known_count) {
+			n->recent[i + known_count] = packmsg_get_sockaddr(&in);
+		} else {
+			packmsg_skip_element(&in);
+		}
 	}
 
-	snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
+	time_t last_reachable = packmsg_get_int64(&in);
+	time_t last_unreachable = packmsg_get_int64(&in);
 
-	fp = fopen(filename, "r");
+	if(!n->last_reachable) {
+		n->last_reachable = last_reachable;
+	}
 
-	if(fp) {
-		mesh->invitation_key = ecdsa_read_pem_private_key(fp);
-		fclose(fp);
-		if(!mesh->invitation_key)
-			logger(mesh, MESHLINK_ERROR, "Reading ECDSA private key file `%s' failed: %s", filename, strerror(errno));
+	if(!n->last_unreachable) {
+		n->last_unreachable = last_unreachable;
 	}
 
-	return mesh->invitation_key;
+	config_free(&config);
+	return true;
 }
 
-bool node_read_dclass(meshlink_handle_t *mesh, node_t *n) {
-	if(n->dclass != 0)
+/// Fill in node details from a config blob.
+bool node_read_from_config(meshlink_handle_t *mesh, node_t *n, const config_t *config) {
+	if(n->canonical_address) {
 		return true;
+	}
 
-	splay_tree_t *config_tree;
-	char *p;
+	packmsg_input_t in = {config->buf, config->len};
+	uint32_t version = packmsg_get_uint32(&in);
 
-	init_configuration(&config_tree);
-	if(!read_host_config(mesh, config_tree, n->name))
-		goto exit;
+	if(version != MESHLINK_CONFIG_VERSION) {
+		return false;
+	}
 
-	if(get_config_string(lookup_config(config_tree, "DeviceClass"), &p)) {
-		n->dclass = atoi(p);
-		free(p);
+	char *name = packmsg_get_str_dup(&in);
+
+	if(!name) {
+		return false;
 	}
 
-exit:
-	exit_configuration(&config_tree);
-	return n->dclass != 0;
-}
+	if(n->name) {
+		if(strcmp(n->name, name)) {
+			free(name);
+			return false;
+		}
 
-bool node_write_dclass(meshlink_handle_t *mesh, node_t *n) {
+		free(name);
+	} else {
+		n->name = name;
+	}
 
-	if(n->dclass == 0)
-		return false;
+	char *submesh_name = packmsg_get_str_dup(&in);
 
-	bool result = false;
+	if(!strcmp(submesh_name, CORE_MESH)) {
+		free(submesh_name);
+		n->submesh = NULL;
+	} else {
+		n->submesh = lookup_or_create_submesh(mesh, submesh_name);
+		free(submesh_name);
 
-	splay_tree_t *config_tree;
-	init_configuration(&config_tree);
+		if(!n->submesh) {
+			return false;
+		}
+	}
 
-	// ignore read errors; in case the file does not exist we will create it
-	read_host_config(mesh, config_tree, n->name);
+	n->devclass = packmsg_get_int32(&in);
+	n->status.blacklisted = packmsg_get_bool(&in);
+	const void *key;
+	uint32_t len = packmsg_get_bin_raw(&in, &key);
 
-	config_t* cnf = lookup_config(config_tree, "DeviceClass");
+	if(len) {
+		if(len != 32) {
+			return false;
+		}
 
-	if(!cnf)
-	{
-		cnf = new_config();
-		cnf->variable = xstrdup("DeviceClass");
-		config_add(config_tree, cnf);
+		if(!ecdsa_active(n->ecdsa)) {
+			n->ecdsa = ecdsa_set_public_key(key);
+		}
 	}
 
-	set_config_int(cnf, n->dclass);
+	n->canonical_address = packmsg_get_str_dup(&in);
+	uint32_t count = packmsg_get_array(&in);
 
-	if(!write_host_config(mesh, config_tree, n->name))
-		goto fail;
+	for(uint32_t i = 0; i < count; i++) {
+		if(i < MAX_RECENT) {
+			n->recent[i] = packmsg_get_sockaddr(&in);
+		} else {
+			packmsg_skip_element(&in);
+		}
+	}
 
-	result = true;
+	n->last_reachable = packmsg_get_int64(&in);
+	n->last_unreachable = packmsg_get_int64(&in);
 
-fail:
-	exit_configuration(&config_tree);
-	return result;
+	return packmsg_done(&in);
 }
 
-void load_all_nodes(meshlink_handle_t *mesh) {
-	DIR *dir;
-	struct dirent *ent;
-	char dname[PATH_MAX];
+bool node_write_config(meshlink_handle_t *mesh, node_t *n) {
+	if(!mesh->confbase) {
+		return true;
+	}
+
+	uint8_t buf[4096];
+	packmsg_output_t out = {buf, sizeof(buf)};
 
-	snprintf(dname,PATH_MAX, "%s" SLASH "hosts", mesh->confbase);
-	dir = opendir(dname);
-	if(!dir) {
-		logger(mesh, MESHLINK_ERROR, "Could not open %s: %s", dname, strerror(errno));
-		return;
+	packmsg_add_uint32(&out, MESHLINK_CONFIG_VERSION);
+	packmsg_add_str(&out, n->name);
+	packmsg_add_str(&out, n->submesh ? n->submesh->name : CORE_MESH);
+	packmsg_add_int32(&out, n->devclass);
+	packmsg_add_bool(&out, n->status.blacklisted);
+
+	if(ecdsa_active(n->ecdsa)) {
+		packmsg_add_bin(&out, ecdsa_get_public_key(n->ecdsa), 32);
+	} else {
+		packmsg_add_bin(&out, "", 0);
 	}
 
-	while((ent = readdir(dir))) {
-		if(!check_id(ent->d_name))
-			continue;
+	packmsg_add_str(&out, n->canonical_address ? n->canonical_address : "");
 
-		node_t *n = lookup_node(mesh, ent->d_name);
-		if(n)
-			continue;
+	uint32_t count = 0;
 
-		n = new_node();
-		n->name = xstrdup(ent->d_name);
-		node_read_dclass(mesh, n);
-		node_add(mesh, n);
+	for(uint32_t i = 0; i < MAX_RECENT; i++) {
+		if(n->recent[i].sa.sa_family) {
+			count++;
+		} else {
+			break;
+		}
 	}
 
-	closedir(dir);
-}
+	packmsg_add_array(&out, count);
 
+	for(uint32_t i = 0; i < count; i++) {
+		packmsg_add_sockaddr(&out, &n->recent[i]);
+	}
 
-char *get_name(meshlink_handle_t *mesh) {
-	char *name = NULL;
+	packmsg_add_int64(&out, n->last_reachable);
+	packmsg_add_int64(&out, n->last_unreachable);
 
-	get_config_string(lookup_config(mesh->config, "Name"), &name);
+	if(!packmsg_output_ok(&out)) {
+		meshlink_errno = MESHLINK_EINTERNAL;
+		return false;
+	}
 
-	if(!name)
-		return NULL;
+	config_t config = {buf, packmsg_output_size(&out, buf)};
 
-	if(!check_id(name)) {
-		logger(mesh, MESHLINK_ERROR, "Invalid name for mesh->self!");
-		free(name);
-		return NULL;
+	if(!config_write(mesh, "current", n->name, &config, mesh->config_key)) {
+		call_error_cb(mesh, MESHLINK_ESTORAGE);
+		return false;
 	}
 
-	return name;
+	return true;
 }
 
-bool setup_myself_reloadable(meshlink_handle_t *mesh) {
-	mesh->localdiscovery = true;
-	keylifetime = 3600; // TODO: check if this can be removed as well
-	mesh->maxtimeout = 900;
-	autoconnect = 3;
-	mesh->self->options |= OPTION_PMTU_DISCOVERY;
+static bool load_node(meshlink_handle_t *mesh, const char *name, void *priv) {
+	(void)priv;
+
+	if(!check_id(name)) {
+		return true;
+	}
+
+	node_t *n = lookup_node(mesh, name);
 
-	read_invitation_key(mesh);
+	if(n) {
+		return true;
+	}
+
+	n = new_node();
+	n->name = xstrdup(name);
+
+	config_t config;
+	packmsg_input_t in;
+
+	if(!node_get_config(mesh, n, &config, &in)) {
+		free_node(n);
+		return false;
+	}
+
+	if(!node_read_from_config(mesh, n, &config)) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(&config);
+		free_node(n);
+		return false;
+	}
+
+	config_free(&config);
+
+	node_add(mesh, n);
 
 	return true;
 }
@@ -246,22 +309,28 @@ static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bind
 
 	if(address) {
 		char *space = strchr(address, ' ');
+
 		if(space) {
 			*space++ = 0;
 			port = space;
 		}
 
-		if(!strcmp(address, "*"))
+		if(!strcmp(address, "*")) {
 			*address = 0;
+		}
 	}
 
-	struct addrinfo *ai, hint = {0};
-	hint.ai_family = addressfamily;
-	hint.ai_socktype = SOCK_STREAM;
-	hint.ai_protocol = IPPROTO_TCP;
-	hint.ai_flags = AI_PASSIVE;
+	struct addrinfo *ai;
+
+	struct addrinfo hint = {
+		.ai_family = AF_UNSPEC,
+		.ai_socktype = SOCK_STREAM,
+		.ai_protocol = IPPROTO_TCP,
+		.ai_flags = AI_PASSIVE,
+	};
 
 	int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
+
 	free(address);
 
 	if(err || !ai) {
@@ -269,6 +338,8 @@ static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bind
 		return false;
 	}
 
+	bool success = false;
+
 	for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
 		// Ignore duplicate addresses
 		bool found = false;
@@ -279,8 +350,9 @@ static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bind
 				break;
 			}
 
-		if(found)
+		if(found) {
 			continue;
+		}
 
 		if(mesh->listen_sockets >= MAXSOCKETS) {
 			logger(mesh, MESHLINK_ERROR, "Too many listening sockets");
@@ -289,12 +361,13 @@ static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bind
 
 		int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
 
-		if(tcp_fd < 0)
+		if(tcp_fd < 0) {
 			continue;
+		}
 
 		int udp_fd = setup_vpn_in_socket(mesh, (sockaddr_t *) aip->ai_addr);
 
-		if(tcp_fd < 0) {
+		if(udp_fd < 0) {
 			close(tcp_fd);
 			continue;
 		}
@@ -310,100 +383,76 @@ static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bind
 
 		mesh->listen_socket[mesh->listen_sockets].bindto = bindto;
 		memcpy(&mesh->listen_socket[mesh->listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+		memcpy(&mesh->listen_socket[mesh->listen_sockets].broadcast_sa, aip->ai_addr, aip->ai_addrlen);
+
+		if(aip->ai_family == AF_INET6) {
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0x0] = 0xff;
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0x1] = 0x02;
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0xf] = 0x01;
+		} else {
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in.sin_addr.s_addr = 0xffffffff;
+		}
+
 		mesh->listen_sockets++;
+		success = true;
 	}
 
 	freeaddrinfo(ai);
-	return true;
+	return success;
 }
 
 /*
   Configure node_t mesh->self and set up the local sockets (listen only)
 */
 bool setup_myself(meshlink_handle_t *mesh) {
-	char *name;
-	char *address = NULL;
-
-	if(!(name = get_name(mesh))) {
-		logger(mesh, MESHLINK_ERROR, "Name for MeshLink instance required!");
-		return false;
-	}
-
-	mesh->self = new_node();
-	mesh->self->connection = new_connection();
-	mesh->self->name = name;
-	mesh->self->dclass = mesh->dclass;
-	mesh->self->connection->name = xstrdup(name);
-	read_host_config(mesh, mesh->config, name);
-
-	if(!get_config_string(lookup_config(mesh->config, "Port"), &mesh->myport)) {
-		logger(mesh, MESHLINK_ERROR, "Port for MeshLink instance required!");
-		return false;
-	}
+	/* Set some defaults */
 
-	mesh->self->connection->options = 0;
-	mesh->self->connection->protocol_major = PROT_MAJOR;
-	mesh->self->connection->protocol_minor = PROT_MINOR;
-
-	mesh->self->options |= PROT_MINOR << 24;
-
-	if(!read_ecdsa_private_key(mesh))
-		return false;
-
-	/* Ensure mesh->myport is numeric */
-
-	if(!atoi(mesh->myport)) {
-		struct addrinfo *ai = str2addrinfo("localhost", mesh->myport, SOCK_DGRAM);
-		sockaddr_t sa;
-		if(!ai || !ai->ai_addr)
-			return false;
-		free(mesh->myport);
-		memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
-		sockaddr2str(&sa, NULL, &mesh->myport);
-	}
-
-	/* Check some options */
-
-	if(!setup_myself_reloadable(mesh))
-		return false;
-
-	/* Compression */
-
-	// TODO: drop compression in the packet layer?
-	mesh->self->incompression = 0;
-	mesh->self->connection->outcompression = 0;
+	mesh->maxtimeout = 900;
 
 	/* Done */
 
 	mesh->self->nexthop = mesh->self;
-	mesh->self->via = mesh->self;
 	mesh->self->status.reachable = true;
-	mesh->self->last_state_change = mesh->loop.now.tv_sec;
+
 	node_add(mesh, mesh->self);
 
 	graph(mesh);
 
-	if(autoconnect)
-		load_all_nodes(mesh);
+	if(!config_scan_all(mesh, "current", "hosts", load_node, NULL)) {
+		logger(mesh, MESHLINK_WARNING, "Could not scan all host config files");
+	}
 
 	/* Open sockets */
 
 	mesh->listen_sockets = 0;
 
-	if(!add_listen_address(mesh, address, NULL))
-		return false;
+	if(!add_listen_address(mesh, NULL, NULL)) {
+		if(strcmp(mesh->myport, "0")) {
+			logger(mesh, MESHLINK_INFO, "Could not bind to port %s, asking OS to choose one for us", mesh->myport);
+			free(mesh->myport);
+			mesh->myport = strdup("0");
+
+			if(!mesh->myport) {
+				return false;
+			}
+
+			if(!add_listen_address(mesh, NULL, NULL)) {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
 
 	if(!mesh->listen_sockets) {
 		logger(mesh, MESHLINK_ERROR, "Unable to create any listening socket!");
 		return false;
 	}
 
-	xasprintf(&mesh->self->hostname, "MYSELF port %s", mesh->myport);
-	mesh->self->connection->hostname = xstrdup(mesh->self->hostname);
-
 	/* Done. */
 
 	mesh->last_config_check = mesh->loop.now.tv_sec;
+	mesh->last_unreachable = mesh->loop.now.tv_sec;
 
 	return true;
 }
@@ -413,16 +462,14 @@ bool setup_myself(meshlink_handle_t *mesh) {
 */
 bool setup_network(meshlink_handle_t *mesh) {
 	init_connections(mesh);
+	init_submeshes(mesh);
 	init_nodes(mesh);
 	init_edges(mesh);
 	init_requests(mesh);
 
-	mesh->pinginterval = 60;
-	mesh->pingtimeout = 5;
-	maxoutbufsize = 10 * MTU;
-
-	if(!setup_myself(mesh))
+	if(!setup_myself(mesh)) {
 		return false;
+	}
 
 	return true;
 }
@@ -440,14 +487,6 @@ void close_network_connections(meshlink_handle_t *mesh) {
 		}
 	}
 
-	if(mesh->outgoings)
-		list_delete_list(mesh->outgoings);
-
-	if(mesh->self && mesh->self->connection) {
-		terminate_connection(mesh, mesh->self->connection, false);
-		free_connection(mesh->self->connection);
-	}
-
 	for(int i = 0; i < mesh->listen_sockets; i++) {
 		io_del(&mesh->loop, &mesh->listen_socket[i].tcp);
 		io_del(&mesh->loop, &mesh->listen_socket[i].udp);
@@ -458,9 +497,13 @@ void close_network_connections(meshlink_handle_t *mesh) {
 	exit_requests(mesh);
 	exit_edges(mesh);
 	exit_nodes(mesh);
+	exit_submeshes(mesh);
 	exit_connections(mesh);
 
-	if(mesh->myport) free(mesh->myport);
+	free(mesh->myport);
+	mesh->myport = NULL;
+
+	mesh->self = NULL;
 
 	return;
 }