X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Ftincctl.c;h=7d82dc442037329ac9bdb1080e897da48196e541;hb=075264a9e18f9fd58cad044c064a91557e9ed429;hp=a90f7a28e21065dad87d68e8426b06fb91f53913;hpb=bf8e3ce13dba6109757c14dc0013a315a75d2ba3;p=tinc

diff --git a/src/tincctl.c b/src/tincctl.c
index a90f7a28..7d82dc44 100644
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -1,6 +1,6 @@
 /*
     tincctl.c -- Controlling a running tincd
-    Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 2007-2009 Guus Sliepen <guus@tinc-vpn.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
@@ -12,27 +12,20 @@
     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.
-
-    $Id$
+    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 <sys/un.h>
-#include <openssl/rand.h>
-#include <openssl/rsa.h>
-#include <openssl/pem.h>
-#include <openssl/evp.h>
-#include <openssl/engine.h>
-
 #include <getopt.h>
 
-#include "conf.h"
-#include "protocol.h"
 #include "xalloc.h"
+#include "protocol.h"
+#include "control_common.h"
+#include "rsagen.h"
+#include "utils.h"
 
 /* The name this program was run with. */
 char *program_name = NULL;
@@ -49,12 +42,14 @@ int kill_tincd = 0;
 /* If nonzero, generate public/private keypair for this host/net. */
 int generate_keys = 0;
 
-char *identname = NULL;				/* program name for syslog */
-char *controlsocketname = NULL;			/* pid file location */
-char *confbase = NULL;
+static char *identname = NULL;				/* program name for syslog */
+static char *controlsocketname = NULL;			/* pid file location */
 char *netname = NULL;
+char *confbase = NULL;
 
-static int status;
+#ifdef HAVE_MINGW
+static struct WSAData wsa_state;
+#endif
 
 static struct option const long_options[] = {
 	{"config", required_argument, NULL, 'c'},
@@ -67,11 +62,11 @@ static struct option const long_options[] = {
 
 static void usage(bool status) {
 	if(status)
-		fprintf(stderr, _("Try `%s --help\' for more information.\n"),
+		fprintf(stderr, "Try `%s --help\' for more information.\n",
 				program_name);
 	else {
-		printf(_("Usage: %s [options] command\n\n"), program_name);
-		printf(_("Valid options are:\n"
+		printf("Usage: %s [options] command\n\n", program_name);
+		printf("Valid options are:\n"
 				"  -c, --config=DIR              Read configuration options from DIR.\n"
 				"  -n, --net=NETNAME             Connect to net NETNAME.\n"
 				"      --controlsocket=FILENAME  Open control socket at FILENAME.\n"
@@ -83,15 +78,20 @@ static void usage(bool status) {
 				"  stop                       Stop tincd.\n"
 				"  restart                    Restart tincd.\n"
 				"  reload                     Reload configuration of running tincd.\n"
-				"  genkey [bits]              Generate a new public/private keypair.\n"
+				"  pid                        Show PID of currently running tincd.\n"
+				"  generate-keys [bits]       Generate a new public/private keypair.\n"
 				"  dump                       Dump a list of one of the following things:\n"
 				"    nodes                    - all known nodes in the VPN\n"
 				"    edges                    - all known connections in the VPN\n"
 				"    subnets                  - all known subnets in the VPN\n"
 				"    connections              - all meta connections with ourself\n"
 				"    graph                    - graph of the VPN in dotty format\n"
-				"\n"));
-		printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
+				"  purge                      Purge unreachable nodes\n"
+				"  debug N                    Set debug level\n"
+				"  retry                      Retry all outgoing connections\n"
+				"  reload                     Partial reload of configuration\n"
+				"\n");
+		printf("Report bugs to tinc@tinc-vpn.org.\n");
 	}
 }
 
@@ -136,40 +136,57 @@ static bool parse_options(int argc, char **argv) {
 	return true;
 }
 
-/* This function prettyprints the key generation process */
+FILE *ask_and_open(const char *filename, const char *what, const char *mode) {
+	FILE *r;
+	char *directory;
+	char buf[PATH_MAX];
+	char buf2[PATH_MAX];
+	size_t len;
+
+	/* Check stdin and stdout */
+	if(isatty(0) && isatty(1)) {
+		/* Ask for a file and/or directory name. */
+		fprintf(stdout, "Please enter a file to save %s to [%s]: ",
+				what, filename);
+		fflush(stdout);
+
+		if(fgets(buf, sizeof buf, stdin) < 0) {
+			fprintf(stderr, "Error while reading stdin: %s\n",
+					strerror(errno));
+			return NULL;
+		}
 
-static void indicator(int a, int b, void *p) {
-	switch (a) {
-		case 0:
-			fprintf(stderr, ".");
-			break;
+		len = strlen(buf);
+		if(len)
+			buf[--len] = 0;
 
-		case 1:
-			fprintf(stderr, "+");
-			break;
+		if(len)
+			filename = buf;
+	}
 
-		case 2:
-			fprintf(stderr, "-");
-			break;
+#ifdef HAVE_MINGW
+	if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
+#else
+	if(filename[0] != '/') {
+#endif
+		/* The directory is a relative path or a filename. */
+		directory = get_current_dir_name();
+		snprintf(buf2, sizeof buf2, "%s/%s", directory, filename);
+		filename = buf2;
+	}
 
-		case 3:
-			switch (b) {
-				case 0:
-					fprintf(stderr, " p\n");
-					break;
+	umask(0077);				/* Disallow everything for group and other */
 
-				case 1:
-					fprintf(stderr, " q\n");
-					break;
+	/* Open it first to keep the inode busy */
 
-				default:
-					fprintf(stderr, "?");
-			}
-			break;
+	r = fopen(filename, mode);
 
-		default:
-			fprintf(stderr, "?");
+	if(!r) {
+		fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
+		return NULL;
 	}
+
+	return r;
 }
 
 /*
@@ -177,22 +194,21 @@ static void indicator(int a, int b, void *p) {
   them in.
 */
 static bool keygen(int bits) {
-	RSA *rsa_key;
+	rsa_t key;
 	FILE *f;
 	char *name = NULL;
 	char *filename;
 
-	fprintf(stderr, _("Generating %d bits keys:\n"), bits);
-	rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
+	fprintf(stderr, "Generating %d bits keys:\n", bits);
 
-	if(!rsa_key) {
-		fprintf(stderr, _("Error during key generation!\n"));
+	if(!rsa_generate(&key, bits, 0x10001)) {
+		fprintf(stderr, "Error during key generation!\n");
 		return false;
 	} else
-		fprintf(stderr, _("Done.\n"));
+		fprintf(stderr, "Done.\n");
 
-	asprintf(&filename, "%s/rsa_key.priv", confbase);
-	f = ask_and_open(filename, _("private RSA key"), "a");
+	xasprintf(&filename, "%s/rsa_key.priv", confbase);
+	f = ask_and_open(filename, "private RSA key", "a");
 
 	if(!f)
 		return false;
@@ -203,26 +219,28 @@ static bool keygen(int bits) {
 #endif
 		
 	if(ftell(f))
-		fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
+		fprintf(stderr, "Appending key to existing contents.\nMake sure only one key is stored in the file.\n");
+
+	rsa_write_pem_private_key(&key, f);
 
-	PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
 	fclose(f);
 	free(filename);
 
 	if(name)
-		asprintf(&filename, "%s/hosts/%s", confbase, name);
+		xasprintf(&filename, "%s/hosts/%s", confbase, name);
 	else
-		asprintf(&filename, "%s/rsa_key.pub", confbase);
+		xasprintf(&filename, "%s/rsa_key.pub", confbase);
 
-	f = ask_and_open(filename, _("public RSA key"), "a");
+	f = ask_and_open(filename, "public RSA key", "a");
 
 	if(!f)
 		return false;
 
 	if(ftell(f))
-		fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
+		fprintf(stderr, "Appending key to existing contents.\nMake sure only one key is stored in the file.\n");
+
+	rsa_write_pem_public_key(&key, f);
 
-	PEM_write_RSAPublicKey(f, rsa_key);
 	fclose(f);
 	free(filename);
 
@@ -236,24 +254,22 @@ static void make_names(void) {
 #ifdef HAVE_MINGW
 	HKEY key;
 	char installdir[1024] = "";
-	long len = sizeof(installdir);
+	long len = sizeof installdir;
 #endif
 
 	if(netname)
-		asprintf(&identname, "tinc.%s", netname);
+		xasprintf(&identname, "tinc.%s", netname);
 	else
 		identname = xstrdup("tinc");
 
 #ifdef HAVE_MINGW
 	if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
 		if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
-			if(!logfilename)
-				asprintf(&logfilename, "%s/log/%s.log", identname);
 			if(!confbase) {
 				if(netname)
-					asprintf(&confbase, "%s/%s", installdir, netname);
+					xasprintf(&confbase, "%s/%s", installdir, netname);
 				else
-					asprintf(&confbase, "%s", installdir);
+					xasprintf(&confbase, "%s", installdir);
 			}
 		}
 		RegCloseKey(key);
@@ -263,27 +279,138 @@ static void make_names(void) {
 #endif
 
 	if(!controlsocketname)
-		asprintf(&controlsocketname, LOCALSTATEDIR "/run/%s.control", identname);
+		xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
 
 	if(netname) {
 		if(!confbase)
-			asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+			xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
 		else
-			fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n"));
+			fprintf(stderr, "Both netname and configuration directory given, using the latter...\n");
 	} else {
 		if(!confbase)
-			asprintf(&confbase, CONFDIR "/tinc");
+			xasprintf(&confbase, CONFDIR "/tinc");
 	}
 }
 
-int main(int argc, char **argv) {
+static int fullread(int fd, void *data, size_t datalen) {
+	int rv, len = 0;
+
+	while(len < datalen) {
+		rv = read(fd, data + len, datalen - len);
+		if(rv == -1 && errno == EINTR)
+			continue;
+		else if(rv == -1)
+			return rv;
+		else if(rv == 0) {
+#ifdef HAVE_MINGW
+			errno = 0;
+#else
+			errno = ENODATA;
+#endif
+			return -1;
+		}
+		len += rv;
+	}
+	return 0;
+}
+
+/*
+   Send a request (raw)
+*/
+static int send_ctl_request(int fd, enum request_type type,
+						   void const *outdata, size_t outdatalen,
+						   int *res_errno_p, void **indata_p,
+						   size_t *indatalen_p) {
+	tinc_ctl_request_t req;
+	int rv;
+	void *indata;
+
+	memset(&req, 0, sizeof req);
+	req.length = sizeof req + outdatalen;
+	req.type = type;
+	req.res_errno = 0;
+
+#ifdef HAVE_MINGW
+	if(send(fd, (void *)&req, sizeof req, 0) != sizeof req || send(fd, outdata, outdatalen, 0) != outdatalen)
+		return -1;
+#else
+	struct iovec vector[2] = {
+		{&req, sizeof req},
+		{(void*) outdata, outdatalen}
+	};
+
+	if(res_errno_p == NULL)
+		return -1;
+
+	while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
+	if(rv != req.length)
+		return -1;
+#endif
+
+	if(fullread(fd, &req, sizeof req) == -1)
+		return -1;
+
+	if(req.length < sizeof req) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if(req.length > sizeof req) {
+		if(indata_p == NULL) {
+			errno = EINVAL;
+			return -1;
+		}
+
+		indata = xmalloc(req.length - sizeof req);
+
+		if(fullread(fd, indata, req.length - sizeof req) == -1) {
+			free(indata);
+			return -1;
+		}
+
+		*indata_p = indata;
+		if(indatalen_p != NULL)
+			*indatalen_p = req.length - sizeof req;
+	}
+
+	*res_errno_p = req.res_errno;
+
+	return 0;
+}
+
+/*
+   Send a request (with printfs)
+*/
+static int send_ctl_request_cooked(int fd, enum request_type type, void const *outdata, size_t outdatalen) {
+	int res_errno = -1;
+	char *buf = NULL;
+	size_t buflen = 0;
+
+	if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
+						(void**) &buf, &buflen)) {
+		fprintf(stderr, "Error sending request: %s\n", strerror(errno));
+		return -1;
+	}
+
+	if(buf != NULL) {
+		printf("%*s", (int)buflen, buf);
+		free(buf);
+	}
+
+	if(res_errno != 0) {
+		fprintf(stderr, "Server reported error: %s\n", strerror(res_errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+int main(int argc, char *argv[], char *envp[]) {
+	tinc_ctl_greeting_t greeting;
 	int fd;
-	struct sockaddr_un addr;
-	program_name = argv[0];
+	int result;
 
-	setlocale(LC_ALL, "");
-	bindtextdomain(PACKAGE, LOCALEDIR);
-	textdomain(PACKAGE);
+	program_name = argv[0];
 
 	if(!parse_options(argc, argv))
 		return 1;
@@ -291,13 +418,13 @@ int main(int argc, char **argv) {
 	make_names();
 
 	if(show_version) {
-		printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
+		printf("%s version %s (built %s %s, protocol %d)\n", PACKAGE,
 			   VERSION, __DATE__, __TIME__, PROT_CURRENT);
-		printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
+		printf("Copyright (C) 1998-2009 Ivo Timmermans, Guus Sliepen and others.\n"
 				"See the AUTHORS file for a complete list.\n\n"
 				"tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
 				"and you are welcome to redistribute it under certain conditions;\n"
-				"see the file COPYING for details.\n"));
+				"see the file COPYING for details.\n");
 
 		return 0;
 	}
@@ -307,28 +434,191 @@ int main(int argc, char **argv) {
 		return 0;
 	}
 
+	if(optind >= argc) {
+		fprintf(stderr, "Not enough arguments.\n");
+		usage(true);
+		return 1;
+	}
+
+	// First handle commands that don't involve connecting to a running tinc daemon.
+
+	if(!strcasecmp(argv[optind], "generate-keys")) {
+		return !keygen(optind > argc ? atoi(argv[optind + 1]) : 2048);
+	}
+
+	if(!strcasecmp(argv[optind], "start")) {
+		argv[optind] = NULL;
+		execve(SBINDIR "/tincd", argv, envp);
+		fprintf(stderr, "Could not start tincd: %s", strerror(errno));
+		return 1;
+	}
+
+	/*
+	 * Now handle commands that do involve connecting to a running tinc daemon.
+	 * Authenticate the server by ensuring the parent directory can be
+	 * traversed only by root. Note this is not totally race-free unless all
+	 * ancestors are writable only by trusted users, which we don't verify.
+	 */
+
+#ifdef HAVE_MINGW
+	if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+		fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
+		return 1;
+	}
+
+	struct sockaddr_in addr;
+	memset(&addr, 0, sizeof addr);
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = htonl(0x7f000001);
+	addr.sin_port = htons(55555);
+
+	fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+	if(fd < 0) {
+		fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
+		return 1;
+	}
+
+	fprintf(stderr, "Got socket %d\n", fd);
+
+	unsigned long arg = 0;
+
+	if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
+		fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
+	}
+#else
+	struct sockaddr_un addr;
+	struct stat statbuf;
+	char *lastslash = strrchr(controlsocketname, '/');
+	if(lastslash != NULL) {
+		/* control socket is not in cwd; stat its parent */
+		*lastslash = 0;
+		result = stat(controlsocketname, &statbuf);
+		*lastslash = '/';
+	} else
+		result = stat(".", &statbuf);
+
+	if(result < 0) {
+		fprintf(stderr, "Unable to check control socket directory permissions: %s\n", strerror(errno));
+		return 1;
+	}
+
+	if(statbuf.st_uid != 0 || (statbuf.st_mode & S_IXOTH) != 0 || (statbuf.st_gid != 0 && (statbuf.st_mode & S_IXGRP)) != 0) {
+		fprintf(stderr, "Insecure permissions on control socket directory\n");
+		return 1;
+	}
+
 	if(strlen(controlsocketname) >= sizeof addr.sun_path) {
-		fprintf(stderr, _("Control socket filename too long!\n"));
+		fprintf(stderr, "Control socket filename too long!\n");
 		return 1;
 	}
 
 	fd = socket(PF_UNIX, SOCK_STREAM, 0);
 	if(fd < 0) {
-		fprintf(stderr, _("Cannot create UNIX socket: %s\n"), strerror(errno));
+		fprintf(stderr, "Cannot create UNIX socket: %s\n", strerror(errno));
 		return 1;
 	}
 
 	memset(&addr, 0, sizeof addr);
 	addr.sun_family = AF_UNIX;
 	strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
+#endif
 
 	if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
-		fprintf(stderr, _("Cannot connect to %s: %s\n"), controlsocketname, strerror(errno));
+			
+		fprintf(stderr, "Cannot connect to %s: %s\n", controlsocketname, sockstrerror(sockerrno));
+		return 1;
+	}
+
+	fprintf(stderr, "Connected!\n");
+
+	if(fullread(fd, &greeting, sizeof greeting) == -1) {
+		fprintf(stderr, "Cannot read greeting from control socket: %s\n",
+				sockstrerror(sockerrno));
+		return 1;
+	}
+
+	if(greeting.version != TINC_CTL_VERSION_CURRENT) {
+		fprintf(stderr, "Version mismatch: server %d, client %d\n",
+				greeting.version, TINC_CTL_VERSION_CURRENT);
+		return 1;
+	}
+
+	if(!strcasecmp(argv[optind], "pid")) {
+		printf("%d\n", greeting.pid);
+		return 0;
+	}
+
+	if(!strcasecmp(argv[optind], "stop")) {
+		return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
+	}
+
+	if(!strcasecmp(argv[optind], "reload")) {
+		return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+	}
+	
+	if(!strcasecmp(argv[optind], "restart")) {
+		return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
+	}
+
+	if(!strcasecmp(argv[optind], "dump")) {
+		if(argc < optind + 2) {
+			fprintf(stderr, "Not enough arguments.\n");
+			usage(true);
+			return 1;
+		}
+
+		if(!strcasecmp(argv[optind+1], "nodes")) {
+			return send_ctl_request_cooked(fd, REQ_DUMP_NODES, NULL, 0) != -1;
+		}
+
+		if(!strcasecmp(argv[optind+1], "edges")) {
+			return send_ctl_request_cooked(fd, REQ_DUMP_EDGES, NULL, 0) != -1;
+		}
+
+		if(!strcasecmp(argv[optind+1], "subnets")) {
+			return send_ctl_request_cooked(fd, REQ_DUMP_SUBNETS, NULL, 0) != -1;
+		}
+
+		if(!strcasecmp(argv[optind+1], "connections")) {
+			return send_ctl_request_cooked(fd, REQ_DUMP_CONNECTIONS, NULL, 0) != -1;
+		}
+
+		if(!strcasecmp(argv[optind+1], "graph")) {
+			return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
+		}
+
+		fprintf(stderr, "Unknown dump type '%s'.\n", argv[optind+1]);
+		usage(true);
 		return 1;
 	}
 
-	printf("Connected to %s.\n", controlsocketname);
+	if(!strcasecmp(argv[optind], "purge")) {
+		return send_ctl_request_cooked(fd, REQ_PURGE, NULL, 0) != -1;
+	}
+
+	if(!strcasecmp(argv[optind], "debug")) {
+		int debuglevel;
 
+		if(argc != optind + 2) {
+			fprintf(stderr, "Invalid arguments.\n");
+			return 1;
+		}
+		debuglevel = atoi(argv[optind+1]);
+		return send_ctl_request_cooked(fd, REQ_SET_DEBUG, &debuglevel,
+									   sizeof debuglevel) != -1;
+	}
+
+	if(!strcasecmp(argv[optind], "retry")) {
+		return send_ctl_request_cooked(fd, REQ_RETRY, NULL, 0) != -1;
+	}
+
+	if(!strcasecmp(argv[optind], "reload")) {
+		return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+	}
+
+	fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);
+	usage(true);
+	
 	close(fd);
 
 	return 0;