/*
tincctl.c -- Controlling a running tincd
- Copyright (C) 2007-2018 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2007-2021 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
#include "top.h"
#include "version.h"
#include "subnet.h"
+#include "keys.h"
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
static char **orig_argv;
-static int orig_argc;
/* If nonzero, display usage information and exit. */
static bool show_help = false;
bool force = false;
bool tty = true;
bool confbasegiven = false;
-bool netnamegiven = false;
char *scriptinterpreter = NULL;
char *scriptextension = "";
static char *prompt;
static void version(void) {
printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
+ printf("Features:"
+#ifdef HAVE_READLINE
+ " readline"
+#endif
+#ifdef HAVE_CURSES
+ " curses"
+#endif
+#ifndef DISABLE_LEGACY
+ " legacy_protocol"
+#endif
+ "\n\n");
printf("Copyright (C) 1998-2018 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"
" reload Partially reload configuration of running tincd.\n"
" pid Show PID of currently running tincd.\n"
#ifdef DISABLE_LEGACY
- " generate-keys Generate a new Ed25519 public/private keypair.\n"
+ " generate-keys Generate a new Ed25519 public/private key pair.\n"
#else
- " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
- " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
+ " generate-keys [bits] Generate new RSA and Ed25519 public/private key pairs.\n"
+ " generate-rsa-keys [bits] Generate a new RSA public/private key pair.\n"
#endif
- " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
+ " generate-ed25519-keys Generate a new Ed25519 public/private key pair.\n"
" dump Dump a list of one of the following things:\n"
" [reachable] nodes - all known nodes in the VPN\n"
" edges - all known connections in the VPN\n"
break;
case 'c': /* config file */
+ free(confbase);
confbase = xstrdup(optarg);
confbasegiven = true;
break;
case 'n': /* net name given */
+ free(netname);
netname = xstrdup(optarg);
break;
break;
case 3: /* open control socket here */
+ free(pidfilename);
pidfilename = xstrdup(optarg);
break;
case '?': /* wrong options */
usage(true);
+ free_names();
return false;
default:
if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
fprintf(stderr, "Invalid character in netname!\n");
+ free_names();
return false;
}
return true;
}
-/* Open a file with the desired permissions, minus the umask.
- Also, if we want to create an executable file, we call fchmod()
- to set the executable bits. */
-
-FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
- mode_t mask = umask(0);
- perms &= ~mask;
- umask(~perms);
- FILE *f = fopen(filename, mode);
-
- if(!f) {
- fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
- return NULL;
- }
-
-#ifdef HAVE_FCHMOD
-
- if((perms & 0444) && f) {
- fchmod(fileno(f), perms);
- }
-
-#endif
- umask(mask);
- return f;
-}
-
-static void disable_old_keys(const char *filename, const char *what) {
- char tmpfile[PATH_MAX] = "";
- char buf[1024];
- bool disabled = false;
- bool block = false;
- bool error = false;
-
- FILE *r = fopen(filename, "r");
- FILE *w = NULL;
-
- if(!r) {
- return;
- }
-
- int result = snprintf(tmpfile, sizeof(tmpfile), "%s.tmp", filename);
-
- if(result < sizeof(tmpfile)) {
- struct stat st = {.st_mode = 0600};
- fstat(fileno(r), &st);
- w = fopenmask(tmpfile, "w", st.st_mode);
- }
-
- while(fgets(buf, sizeof(buf), r)) {
- if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
- if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
- disabled = true;
- block = true;
- }
- }
-
- bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
-
- if(ed25519pubkey) {
- disabled = true;
- }
-
- if(w) {
- if(block || ed25519pubkey) {
- fputc('#', w);
- }
-
- if(fputs(buf, w) < 0) {
- error = true;
- break;
- }
- }
-
- if(block && !strncmp(buf, "-----END ", 9)) {
- block = false;
- }
- }
-
- if(w)
- if(fclose(w) < 0) {
- error = true;
- }
-
- if(ferror(r) || fclose(r) < 0) {
- error = true;
- }
-
- if(disabled) {
- if(!w || error) {
- fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
-
- if(w) {
- unlink(tmpfile);
- }
-
- return;
- }
-
-#ifdef HAVE_MINGW
- // We cannot atomically replace files on Windows.
- char bakfile[PATH_MAX] = "";
- snprintf(bakfile, sizeof(bakfile), "%s.bak", filename);
-
- if(rename(filename, bakfile) || rename(tmpfile, filename)) {
- rename(bakfile, filename);
-#else
-
- if(rename(tmpfile, filename)) {
-#endif
- fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
- } else {
-#ifdef HAVE_MINGW
- unlink(bakfile);
-#endif
- fprintf(stderr, "Warning: old key(s) found and disabled.\n");
- }
- }
-
- unlink(tmpfile);
-}
-
static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
FILE *r;
char directory[PATH_MAX] = ".";
}
/*
- Generate a public/private Ed25519 keypair, and ask for a file to store
+ Generate a public/private Ed25519 key pair, and ask for a file to store
them in.
*/
static bool ed25519_keygen(bool ask) {
FILE *f;
char fname[PATH_MAX];
- fprintf(stderr, "Generating Ed25519 keypair:\n");
+ fprintf(stderr, "Generating Ed25519 key pair:\n");
if(!(key = ecdsa_generate())) {
fprintf(stderr, "Error during key generation!\n");
#ifndef DISABLE_LEGACY
/*
- Generate a public/private RSA keypair, and ask for a file to store
+ Generate a public/private RSA key pair, and ask for a file to store
them in.
*/
static bool rsa_keygen(int bits, bool ask) {
return false;
}
- struct sockaddr_un sa;
+ struct sockaddr_un sa = {
+ .sun_family = AF_UNIX,
+ };
- sa.sun_family = AF_UNIX;
+ if(strlen(unixsocketname) >= sizeof(sa.sun_path)) {
+ fprintf(stderr, "UNIX socket filename %s is too long!", unixsocketname);
+ return false;
+ }
strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
- sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
-
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd < 0) {
#endif
+ char *default_c = "tincd";
+
if(slash++) {
xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
} else {
- c = "tincd";
+ c = default_c;
}
int nargc = 0;
#ifdef HAVE_MINGW
int status = spawnvp(_P_WAIT, c, nargv);
+ free(nargv);
+
+ if(c != default_c) {
+ free(c);
+ }
+
if(status == -1) {
fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
return 1;
if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
free(nargv);
+
+ if(c != default_c) {
+ free(c);
+ }
+
return 1;
}
if(pid == -1) {
fprintf(stderr, "Could not fork: %s\n", strerror(errno));
free(nargv);
+
+ if(c != default_c) {
+ free(c);
+ }
+
return 1;
}
signal(SIGINT, SIG_DFL);
#endif
- if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
+ bool failed = failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status);
+
+ if(failed) {
fprintf(stderr, "Error starting %s\n", c);
- return 1;
}
- return 0;
+ if(c != default_c) {
+ free(c);
+ }
+
+ return failed ? EXIT_FAILURE : EXIT_SUCCESS;
#endif
}
}
#ifdef HAVE_MINGW
- return remove_service();
+ return remove_service() ? EXIT_SUCCESS : EXIT_FAILURE;
#else
if(!stop_tincd()) {
char *node = NULL;
char *variable;
char *value;
- int len;
+ size_t len;
len = strcspn(line, "\t =");
value = line + len;
found = true;
variable = (char *)variables[i].name;
- if(!strcasecmp(variable, "Subnet")) {
+ if(!strcasecmp(variable, "Subnet") && *value) {
subnet_t s = {0};
if(!str2net(&s, value)) {
fprintf(stderr, "Malformed subnet definition %s\n", value);
+ return 1;
}
if(!subnetcheck(s)) {
if(node && !check_id(node)) {
fprintf(stderr, "Invalid name for node.\n");
+
+ if(node != line) {
+ free(node);
+ }
+
return 1;
}
fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
} else {
fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
+
+ if(node && node != line) {
+ free(node);
+ }
+
return 1;
}
}
if(node) {
snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
+
+ if(node != line) {
+ free(node);
+ node = NULL;
+ }
} else {
snprintf(filename, sizeof(filename), "%s", tinc_conf);
}
return result;
}
+static void cleanup() {
+ free(tinc_conf);
+ free(hosts_dir);
+ free_names();
+}
int main(int argc, char *argv[]) {
program_name = argv[0];
orig_argv = argv;
- orig_argc = argc;
tty = isatty(0) && isatty(1);
if(!parse_options(argc, argv)) {
make_names(false);
xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
+ atexit(cleanup);
if(show_version) {
version();
#endif
- srand(time(NULL));
+ gettimeofday(&now, NULL);
+ srand(now.tv_sec + now.tv_usec);
crypto_init();
if(optind >= argc) {
projects / tinc / blobdiff