/*
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
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 "xalloc.h"
#include "protocol.h"
#include "control_common.h"
+#include "rsagen.h"
/* The name this program was run with. */
char *program_name = NULL;
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"
" 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");
}
}
/* 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]: "),
+ 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"),
+ fprintf(stderr, "Error while reading stdin: %s\n",
strerror(errno));
return NULL;
}
r = fopen(filename, mode);
if(!r) {
- fprintf(stderr, _("Error opening file `%s': %s\n"), filename, strerror(errno));
+ fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
return NULL;
}
return r;
}
-/* This function prettyprints the key generation process */
-
-static void indicator(int a, int b, void *p) {
- switch (a) {
- case 0:
- fprintf(stderr, ".");
- break;
-
- case 1:
- fprintf(stderr, "+");
- break;
-
- case 2:
- fprintf(stderr, "-");
- break;
-
- case 3:
- switch (b) {
- case 0:
- fprintf(stderr, " p\n");
- break;
-
- case 1:
- fprintf(stderr, " q\n");
- break;
-
- default:
- fprintf(stderr, "?");
- }
- break;
-
- default:
- fprintf(stderr, "?");
- }
-}
-
/*
Generate a public/private RSA keypair, and ask for a file to store
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;
#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);
#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");
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);
+ xasprintf(&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);
#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");
}
}
static int fullread(int fd, void *data, size_t datalen) {
int rv, len = 0;
- while (len < datalen) {
+ while(len < datalen) {
rv = read(fd, data + len, datalen - len);
if(rv == -1 && errno == EINTR)
continue;
- else if (rv == -1)
+ else if(rv == -1)
return rv;
- else if (rv == 0) {
+ else if(rv == 0) {
errno = ENODATA;
return -1;
}
tinc_ctl_request_t req;
int rv;
struct iovec vector[2] = {
- {&req, sizeof(req)},
+ {&req, sizeof req},
{(void*) outdata, outdatalen}
};
void *indata;
}
if(req.length > sizeof req) {
- if (indata_p == NULL) {
+ if(indata_p == NULL) {
errno = EINVAL;
return -1;
}
/*
Send a request (with printfs)
*/
-static int send_ctl_request_cooked(int fd, enum request_type type,
- void const *outdata, size_t outdatalen)
-{
+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));
+ fprintf(stderr, "Error sending request: %s\n", strerror(errno));
return -1;
}
if(buf != NULL) {
- printf("%*s", buflen, buf);
+ printf("%*s", (int)buflen, buf);
free(buf);
}
if(res_errno != 0) {
- fprintf(stderr, _("Server reported error: %s\n"), strerror(res_errno));
+ fprintf(stderr, "Server reported error: %s\n", strerror(res_errno));
return -1;
}
int main(int argc, char *argv[], char *envp[]) {
struct sockaddr_un addr;
- int fd;
- int len;
tinc_ctl_greeting_t greeting;
- tinc_ctl_request_t req;
+ int fd;
+ int result;
program_name = argv[0];
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
-
if(!parse_options(argc, argv))
return 1;
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;
}
}
if(optind >= argc) {
- fprintf(stderr, _("Not enough arguments.\n"));
+ 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]) : 1024);
+ return !keygen(optind > argc ? atoi(argv[optind + 1]) : 2048);
}
if(!strcasecmp(argv[optind], "start")) {
argv[optind] = NULL;
- execve("tincd", argv, envp);
- fprintf(stderr, _("Could not start tincd: %s"), strerror(errno));
+ 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.
+ /*
+ * 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.
+ */
+
+ 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;
}
strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
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, strerror(errno));
return 1;
}
if(fullread(fd, &greeting, sizeof greeting) == -1) {
- fprintf(stderr, _("Cannot read greeting from control socket: %s\n"),
+ fprintf(stderr, "Cannot read greeting from control socket: %s\n",
strerror(errno));
return 1;
}
if(greeting.version != TINC_CTL_VERSION_CURRENT) {
- fprintf(stderr, _("Version mismatch: server %d, client %d\n"),
+ fprintf(stderr, "Version mismatch: server %d, client %d\n",
greeting.version, TINC_CTL_VERSION_CURRENT);
return 1;
}
- struct ucred cred;
- socklen_t credlen = sizeof cred;
-
- if(getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cred, &credlen) < 0) {
- fprintf(stderr, _("Could not obtain PID: %s\n"), strerror(errno));
- return 1;
- }
-
if(!strcasecmp(argv[optind], "pid")) {
- printf("%d\n", cred.pid);
+ printf("%d\n", greeting.pid);
return 0;
}
}
if(!strcasecmp(argv[optind], "dump")) {
- if (argc < optind + 2) {
- fprintf(stderr, _("Not enough arguments.\n"));
+ if(argc < optind + 2) {
+ fprintf(stderr, "Not enough arguments.\n");
usage(true);
return 1;
}
return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
}
- fprintf(stderr, _("Unknown dump type '%s'.\n"), argv[optind+1]);
+ fprintf(stderr, "Unknown dump type '%s'.\n", argv[optind+1]);
usage(true);
return 1;
}
- fprintf(stderr, _("Unknown command `%s'.\n"), argv[optind]);
+ 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);