X-Git-Url: http://git.meshlink.io/?p=meshlink;a=blobdiff_plain;f=src%2Fnet_setup.c;h=a7a538f01c75d1b4ed66fa77114391bbce123ce1;hp=b9cddeb00ccc2c7bd73dc69710ef7d148b63156c;hb=HEAD;hpb=db8e6e4221c974314fd8b05d79dbc94152f01108

diff --git a/src/net_setup.c b/src/net_setup.c
index b9cddeb0..a7a538f0 100644
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -93,6 +93,11 @@ bool node_read_public_key(meshlink_handle_t *mesh, node_t *n) {
 	// While we are at it, read known address information
 	if(!n->canonical_address) {
 		n->canonical_address = packmsg_get_str_dup(&in);
+
+		if(!*n->canonical_address) {
+			free(n->canonical_address);
+			n->canonical_address = NULL;
+		}
 	} else {
 		packmsg_skip_element(&in);
 	}
@@ -191,6 +196,12 @@ bool node_read_from_config(meshlink_handle_t *mesh, node_t *n, const config_t *c
 	}
 
 	n->canonical_address = packmsg_get_str_dup(&in);
+
+	if(!*n->canonical_address) {
+		free(n->canonical_address);
+		n->canonical_address = NULL;
+	}
+
 	uint32_t count = packmsg_get_array(&in);
 
 	for(uint32_t i = 0; i < count; i++) {
@@ -207,11 +218,26 @@ bool node_read_from_config(meshlink_handle_t *mesh, node_t *n, const config_t *c
 	return packmsg_done(&in);
 }
 
-bool node_write_config(meshlink_handle_t *mesh, node_t *n) {
+bool node_write_config(meshlink_handle_t *mesh, node_t *n, bool new_key) {
 	if(!mesh->confbase) {
 		return true;
 	}
 
+	switch(mesh->storage_policy) {
+	case MESHLINK_STORAGE_KEYS_ONLY:
+		if(!new_key) {
+			return true;
+		}
+
+		break;
+
+	case MESHLINK_STORAGE_DISABLED:
+		return true;
+
+	default:
+		break;
+	}
+
 	uint8_t buf[4096];
 	packmsg_output_t out = {buf, sizeof(buf)};
 
@@ -260,6 +286,7 @@ bool node_write_config(meshlink_handle_t *mesh, node_t *n) {
 		return false;
 	}
 
+	n->status.dirty = false;
 	return true;
 }
 
@@ -267,6 +294,15 @@ static bool load_node(meshlink_handle_t *mesh, const char *name, void *priv) {
 	(void)priv;
 
 	if(!check_id(name)) {
+		// Check if this is a temporary file, if so remove it
+		const char *suffix = strstr(name, ".tmp");
+
+		if(suffix && !suffix[4]) {
+			char filename[PATH_MAX];
+			snprintf(filename, sizeof(filename), "%s" SLASH "current" SLASH "hosts", mesh->confbase);
+			unlink(filename);
+		}
+
 		return true;
 	}
 
@@ -301,6 +337,136 @@ static bool load_node(meshlink_handle_t *mesh, const char *name, void *priv) {
 	return true;
 }
 
+int setup_tcp_listen_socket(meshlink_handle_t *mesh, const struct addrinfo *aip) {
+	int nfd = socket(aip->ai_family, SOCK_STREAM, IPPROTO_TCP);
+
+	if(nfd == -1) {
+		return -1;
+	}
+
+#ifdef FD_CLOEXEC
+	fcntl(nfd, F_SETFD, FD_CLOEXEC);
+#endif
+
+#ifdef O_NONBLOCK
+	int flags = fcntl(nfd, F_GETFL);
+
+	if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) {
+		closesocket(nfd);
+		logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "fcntl", strerror(errno));
+		return -1;
+	}
+
+#elif defined(WIN32)
+	unsigned long arg = 1;
+
+	if(ioctlsocket(nfd, FIONBIO, &arg) != 0) {
+		closesocket(nfd);
+		logger(mesh, MESHLINK_ERROR, "Call to `%s' failed: %s", "ioctlsocket", sockstrerror(sockerrno));
+		return -1;
+	}
+
+#endif
+	int option = 1;
+	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
+
+#if defined(IPV6_V6ONLY)
+
+	if(aip->ai_family == AF_INET6) {
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
+	}
+
+#else
+#warning IPV6_V6ONLY not defined
+#endif
+
+	if(bind(nfd, aip->ai_addr, aip->ai_addrlen)) {
+		closesocket(nfd);
+		return -1;
+	}
+
+	if(listen(nfd, 3)) {
+		logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "listen", sockstrerror(sockerrno));
+		closesocket(nfd);
+		return -1;
+	}
+
+	return nfd;
+}
+
+int setup_udp_listen_socket(meshlink_handle_t *mesh, const struct addrinfo *aip) {
+	int nfd = socket(aip->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+
+	if(nfd == -1) {
+		return -1;
+	}
+
+#ifdef FD_CLOEXEC
+	fcntl(nfd, F_SETFD, FD_CLOEXEC);
+#endif
+
+#ifdef O_NONBLOCK
+	int flags = fcntl(nfd, F_GETFL);
+
+	if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) {
+		closesocket(nfd);
+		logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "fcntl", strerror(errno));
+		return -1;
+	}
+
+#elif defined(WIN32)
+	unsigned long arg = 1;
+
+	if(ioctlsocket(nfd, FIONBIO, &arg) != 0) {
+		closesocket(nfd);
+		logger(mesh, MESHLINK_ERROR, "Call to `%s' failed: %s", "ioctlsocket", sockstrerror(sockerrno));
+		return -1;
+	}
+
+#endif
+
+	int option = 1;
+	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
+	setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof(option));
+
+#if defined(IPV6_V6ONLY)
+
+	if(aip->ai_family == AF_INET6) {
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
+	}
+
+#endif
+
+#if defined(IP_DONTFRAG) && !defined(IP_DONTFRAGMENT)
+#define IP_DONTFRAGMENT IP_DONTFRAG
+#endif
+
+#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+	option = IP_PMTUDISC_DO;
+	setsockopt(nfd, IPPROTO_IP, IP_MTU_DISCOVER, (void *)&option, sizeof(option));
+#elif defined(IP_DONTFRAGMENT)
+	option = 1;
+	setsockopt(nfd, IPPROTO_IP, IP_DONTFRAGMENT, (void *)&option, sizeof(option));
+#endif
+
+	if(aip->ai_family == AF_INET6) {
+#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
+		option = IPV6_PMTUDISC_DO;
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_MTU_DISCOVER, (void *)&option, sizeof(option));
+#elif defined(IPV6_DONTFRAG)
+		option = 1;
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_DONTFRAG, (void *)&option, sizeof(option));
+#endif
+	}
+
+	if(bind(nfd, aip->ai_addr, aip->ai_addrlen)) {
+		closesocket(nfd);
+		return -1;
+	}
+
+	return nfd;
+}
+
 /*
   Add listening sockets.
 */
@@ -311,7 +477,7 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 		.ai_family = AF_UNSPEC,
 		.ai_socktype = SOCK_STREAM,
 		.ai_protocol = IPPROTO_TCP,
-		.ai_flags = AI_PASSIVE,
+		.ai_flags = AI_PASSIVE | AI_NUMERICSERV,
 	};
 
 	int err = getaddrinfo(NULL, mesh->myport, &hint, &ai);
@@ -345,15 +511,9 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 
 		/* Try to bind to TCP */
 
-		int tcp_fd = socket(aip->ai_family, SOCK_STREAM, IPPROTO_TCP);
+		int tcp_fd = setup_tcp_listen_socket(mesh, aip);
 
 		if(tcp_fd == -1) {
-			continue;
-		}
-
-		if(bind(tcp_fd, aip->ai_addr, aip->ai_addrlen)) {
-			closesocket(tcp_fd);
-
 			if(errno == EADDRINUSE) {
 				/* If this port is in use for any address family, avoid it. */
 				success = false;
@@ -363,15 +523,9 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 			}
 		}
 
-		if(!setup_listen_socket(mesh, tcp_fd, aip->ai_family)) {
-			closesocket(tcp_fd);
-			success = false;
-			break;
-		}
-
 		/* If TCP worked, then we require that UDP works as well. */
 
-		int udp_fd = socket(aip->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+		int udp_fd = setup_udp_listen_socket(mesh, aip);
 
 		if(udp_fd == -1) {
 			closesocket(tcp_fd);
@@ -379,17 +533,10 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 			break;
 		}
 
-		if(bind(udp_fd, aip->ai_addr, aip->ai_addrlen) || !setup_vpn_in_socket(mesh, udp_fd, aip->ai_family)) {
-			closesocket(tcp_fd);
-			closesocket(udp_fd);
-			success = false;
-			break;
-		}
-
 		io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].tcp, handle_new_meta_connection, &mesh->listen_socket[mesh->listen_sockets], tcp_fd, IO_READ);
 		io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].udp, handle_incoming_vpn_data, &mesh->listen_socket[mesh->listen_sockets], udp_fd, IO_READ);
 
-		if(mesh->log_level >= MESHLINK_INFO) {
+		if(mesh->log_level <= MESHLINK_INFO) {
 			char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
 			logger(mesh, MESHLINK_INFO, "Listening on %s", hostname);
 			free(hostname);
@@ -416,8 +563,8 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 		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);
-			close(mesh->listen_socket[i].tcp.fd);
-			close(mesh->listen_socket[i].udp.fd);
+			closesocket(mesh->listen_socket[i].tcp.fd);
+			closesocket(mesh->listen_socket[i].udp.fd);
 		}
 
 		mesh->listen_sockets = 0;
@@ -429,13 +576,7 @@ static bool add_listen_sockets(meshlink_handle_t *mesh) {
 /*
   Configure node_t mesh->self and set up the local sockets (listen only)
 */
-bool setup_myself(meshlink_handle_t *mesh) {
-	/* Set some defaults */
-
-	mesh->maxtimeout = 900;
-
-	/* Done */
-
+static bool setup_myself(meshlink_handle_t *mesh) {
 	mesh->self->nexthop = mesh->self;
 
 	node_add(mesh, mesh->self);
@@ -473,7 +614,6 @@ bool setup_myself(meshlink_handle_t *mesh) {
 
 	/* Done. */
 
-	mesh->last_config_check = mesh->loop.now.tv_sec;
 	mesh->last_unreachable = mesh->loop.now.tv_sec;
 
 	return true;
@@ -512,8 +652,8 @@ void close_network_connections(meshlink_handle_t *mesh) {
 	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);
-		close(mesh->listen_socket[i].tcp.fd);
-		close(mesh->listen_socket[i].udp.fd);
+		closesocket(mesh->listen_socket[i].tcp.fd);
+		closesocket(mesh->listen_socket[i].udp.fd);
 	}
 
 	exit_requests(mesh);