+++ /dev/null
-/*
- tincctl.c -- Controlling a running tincd
- Copyright (C) 2014 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
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- 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.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "system.h"
-
-#include <getopt.h>
-
-#ifdef HAVE_READLINE
-#include "readline/readline.h"
-#include "readline/history.h"
-#endif
-
-#include "xalloc.h"
-#include "protocol.h"
-#include "control_common.h"
-#include "crypto.h"
-#include "ecdsagen.h"
-#include "info.h"
-#include "invitation.h"
-#include "rsagen.h"
-#include "utils.h"
-#include "tincctl.h"
-#include "top.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;
-
-/* If nonzero, print the version on standard output and exit. */
-static bool show_version = false;
-
-static char *name = NULL;
-static char controlcookie[1025];
-char *tinc_conf = NULL;
-char *hosts_dir = NULL;
-struct timeval now;
-
-// Horrible global variables...
-static int pid = 0;
-int fd = -1;
-char line[4096];
-static int code;
-static int req;
-static int result;
-static bool force = false;
-bool tty = true;
-bool confbasegiven = false;
-bool netnamegiven = false;
-char *scriptinterpreter = NULL;
-char *scriptextension = "";
-static char *prompt;
-
-static struct option const long_options[] = {
- {"config", required_argument, NULL, 'c'},
- {"net", required_argument, NULL, 'n'},
- {"help", no_argument, NULL, 1},
- {"version", no_argument, NULL, 2},
- {"pidfile", required_argument, NULL, 3},
- {"force", no_argument, NULL, 4},
- {NULL, 0, NULL, 0}
-};
-
-static void version(void) {
- printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
- VERSION, __DATE__, __TIME__, PROT_MAJOR, PROT_MINOR);
- printf("Copyright (C) 1998-2012 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");
-}
-
-static void usage(bool status) {
- if(status) {
- 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"
- " -c, --config=DIR Read configuration options from DIR.\n"
- " -n, --net=NETNAME Connect to net NETNAME.\n"
- " --pidfile=FILENAME Read control cookie from FILENAME.\n"
- " --help Display this help and exit.\n"
- " --version Output version information and exit.\n"
- "\n"
- "Valid commands are:\n"
- " init [name] Create initial configuration files.\n"
- " get VARIABLE Print current value of VARIABLE\n"
- " set VARIABLE VALUE Set VARIABLE to VALUE\n"
- " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
- " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
- " start [tincd options] Start tincd.\n"
- " stop Stop tincd.\n"
- " restart [tincd options] Restart tincd.\n"
- " reload Partially reload configuration of running tincd.\n"
- " pid Show PID of currently running tincd.\n"
- " generate-keys [bits] Generate new RSA and ECDSA public/private keypairs.\n"
- " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
- " generate-ecdsa-keys Generate a new ECDSA public/private keypair.\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"
- " subnets - all known subnets in the VPN\n"
- " connections - all meta connections with ourself\n"
- " [di]graph - graph of the VPN in dotty format\n"
- " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
- " purge Purge unreachable nodes\n"
- " debug N Set debug level\n"
- " retry Retry all outgoing connections\n"
- " disconnect NODE Close meta connection with NODE\n"
-#ifdef HAVE_CURSES
- " top Show real-time statistics\n"
-#endif
- " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
- " log [level] Dump log output [up to the specified level]\n"
- " export Export host configuration of local node to standard output\n"
- " export-all Export all host configuration files to standard output\n"
- " import [--force] Import host configuration file(s) from standard input\n"
- " exchange [--force] Same as export followed by import\n"
- " exchange-all [--force] Same as export-all followed by import\n"
- " invite NODE [...] Generate an invitation for NODE\n"
- " join INVITATION Join a VPN using an INVITIATION\n"
- " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
- "\n");
- printf("Report bugs to bugs@meshlink.io.\n");
- }
-}
-
-static bool parse_options(int argc, char **argv) {
- int r;
- int option_index = 0;
-
- while((r = getopt_long(argc, argv, "+c:n:", long_options, &option_index)) != EOF) {
- switch (r) {
- case 0: /* long option */
- break;
-
- case 'c': /* config file */
- confbase = xstrdup(optarg);
- confbasegiven = true;
- break;
-
- case 'n': /* net name given */
- netname = xstrdup(optarg);
- break;
-
- case 1: /* show help */
- show_help = true;
- break;
-
- case 2: /* show version */
- show_version = true;
- break;
-
- case 3: /* open control socket here */
- pidfilename = xstrdup(optarg);
- break;
-
- case 4: /* force */
- force = true;
- break;
-
- case '?': /* wrong options */
- usage(true);
- return false;
-
- default:
- break;
- }
- }
-
- if(!netname && (netname = getenv("NETNAME")))
- netname = xstrdup(netname);
-
- /* netname "." is special: a "top-level name" */
-
- if(netname && (!*netname || !strcmp(netname, "."))) {
- free(netname);
- netname = NULL;
- }
-
- if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
- fprintf(stderr, "Invalid character in netname!\n");
- 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);
-#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, *w;
-
- r = fopen(filename, "r");
- if(!r)
- return;
-
- snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
-
- 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, " EC ") && strstr(what, "ECDSA")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
- disabled = true;
- block = true;
- }
- }
-
- bool ecdsapubkey = !strncasecmp(buf, "ECDSAPublicKey", 14) && strchr(" \t=", buf[14]) && strstr(what, "ECDSA");
-
- if(ecdsapubkey)
- disabled = true;
-
- if(w) {
- if(block || ecdsapubkey)
- 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;
- char buf[PATH_MAX];
- char buf2[PATH_MAX];
-
- /* Check stdin and stdout */
- if(ask && tty) {
- /* Ask for a file and/or directory name. */
- fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
-
- if(fgets(buf, sizeof buf, stdin) == NULL) {
- fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
- return NULL;
- }
-
- size_t len = strlen(buf);
- if(len)
- buf[--len] = 0;
-
- if(len)
- filename = buf;
- }
-
-#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" SLASH "%s", directory, filename);
- filename = buf2;
- }
-
- disable_old_keys(filename, what);
-
- /* Open it first to keep the inode busy */
-
- r = fopenmask(filename, mode, perms);
-
- if(!r) {
- fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
- return NULL;
- }
-
- return r;
-}
-
-/*
- Generate a public/private ECDSA keypair, and ask for a file to store
- them in.
-*/
-static bool ecdsa_keygen(bool ask) {
- ecdsa_t *key;
- FILE *f;
- char pubname[PATH_MAX], privname[PATH_MAX];
-
- fprintf(stderr, "Generating ECDSA keypair:\n");
-
- if(!(key = ecdsa_generate())) {
- fprintf(stderr, "Error during key generation!\n");
- return false;
- } else
- fprintf(stderr, "Done.\n");
-
- snprintf(privname,PATH_MAX, "%s" SLASH "ecdsa_key.priv", confbase);
- f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600);
-
- if(!f)
- return false;
-
- if(!ecdsa_write_pem_private_key(key, f)) {
- fprintf(stderr, "Error writing private key!\n");
- ecdsa_free(key);
- fclose(f);
- return false;
- }
-
- fclose(f);
-
- if(name)
- snprintf(pubname, PATH_MAX,"%s" SLASH "hosts" SLASH "%s", confbase, name);
- else
- snprintf(pubname, PATH_MAX,"%s" SLASH "ecdsa_key.pub", confbase);
-
- f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
-
- if(!f)
- return false;
-
- char *pubkey = ecdsa_get_base64_public_key(key);
- fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
-
- fclose(f);
- ecdsa_free(key);
-
- return true;
-}
-
-/*
- Generate a public/private RSA keypair, and ask for a file to store
- them in.
-*/
-static bool rsa_keygen(int bits, bool ask) {
- rsa_t *key;
- FILE *f;
- char pubname[PATH_MAX], privname[PATH_MAX];
-
- fprintf(stderr, "Generating %d bits keys:\n", bits);
-
- if(!(key = rsa_generate(bits, 0x10001))) {
- fprintf(stderr, "Error during key generation!\n");
- return false;
- } else
- fprintf(stderr, "Done.\n");
-
- snprintf(privname,PATH_MAX, "%s" SLASH "rsa_key.priv", confbase);
- f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
-
- if(!f)
- return false;
-
- if(!rsa_write_pem_private_key(key, f)) {
- fprintf(stderr, "Error writing private key!\n");
- fclose(f);
- rsa_free(key);
- return false;
- }
-
- fclose(f);
-
- if(name)
- snprintf(pubname,PATH_MAX,"%s" SLASH "hosts" SLASH "%s", confbase, name);
- else
- snprintf(pubname,PATH_MAX,"%s" SLASH "rsa_key.pub", confbase);
-
- f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
-
- if(!f)
- return false;
-
- if(!rsa_write_pem_public_key(key, f)) {
- fprintf(stderr, "Error writing public key!\n");
- fclose(f);
- rsa_free(key);
- return false;
- }
-
- fclose(f);
- rsa_free(key);
-
- return true;
-}
-
-char buffer[4096];
-size_t blen = 0;
-
-bool recvline(int fd, char *line, size_t len) {
- char *newline = NULL;
-
- if(!fd)
- abort();
-
- while(!(newline = memchr(buffer, '\n', blen))) {
- int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
- if(result == -1 && errno == EINTR)
- continue;
- else if(result <= 0)
- return false;
- blen += result;
- }
-
- if(newline - buffer >= len)
- return false;
-
- len = newline - buffer;
-
- memcpy(line, buffer, len);
- line[len] = 0;
- memmove(buffer, newline + 1, blen - len - 1);
- blen -= len + 1;
-
- return true;
-}
-
-bool recvdata(int fd, char *data, size_t len) {
- if(len == -1)
- len = blen;
-
- while(blen < len) {
- int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
- if(result == -1 && errno == EINTR)
- continue;
- else if(result <= 0)
- return false;
- blen += result;
- }
-
- memcpy(data, buffer, len);
- memmove(buffer, buffer + len, blen - len);
- blen -= len;
-
- return true;
-}
-
-bool sendline(int fd, char *format, ...) {
- static char buffer[4096];
- char *p = buffer;
- int blen = 0;
- va_list ap;
-
- va_start(ap, format);
- blen = vsnprintf(buffer, sizeof buffer, format, ap);
- va_end(ap);
-
- if(blen < 1 || blen >= sizeof buffer)
- return false;
-
- buffer[blen] = '\n';
- blen++;
-
- while(blen) {
- int result = send(fd, p, blen, MSG_NOSIGNAL);
- if(result == -1 && errno == EINTR)
- continue;
- else if(result <= 0)
- return false;
- p += result;
- blen -= result;
- }
-
- return true;
-}
-
-static void pcap(int fd, FILE *out, int snaplen) {
- sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
- char data[9018];
-
- struct {
- uint32_t magic;
- uint16_t major;
- uint16_t minor;
- uint32_t tz_offset;
- uint32_t tz_accuracy;
- uint32_t snaplen;
- uint32_t ll_type;
- } header = {
- 0xa1b2c3d4,
- 2, 4,
- 0, 0,
- snaplen ?: sizeof data,
- 1,
- };
-
- struct {
- uint32_t tv_sec;
- uint32_t tv_usec;
- uint32_t len;
- uint32_t origlen;
- } packet;
-
- struct timeval tv;
-
- fwrite(&header, sizeof header, 1, out);
- fflush(out);
-
- char line[32];
- while(recvline(fd, line, sizeof line)) {
- int code, req, len;
- int n = sscanf(line, "%d %d %d", &code, &req, &len);
- gettimeofday(&tv, NULL);
- if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof data)
- break;
- if(!recvdata(fd, data, len))
- break;
- packet.tv_sec = tv.tv_sec;
- packet.tv_usec = tv.tv_usec;
- packet.len = len;
- packet.origlen = len;
- fwrite(&packet, sizeof packet, 1, out);
- fwrite(data, len, 1, out);
- fflush(out);
- }
-}
-
-static void logcontrol(int fd, FILE *out, int level) {
- sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
- char data[1024];
- char line[32];
-
- while(recvline(fd, line, sizeof line)) {
- int code, req, len;
- int n = sscanf(line, "%d %d %d", &code, &req, &len);
- if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof data)
- break;
- if(!recvdata(fd, data, len))
- break;
- fwrite(data, len, 1, out);
- fputc('\n', out);
- fflush(out);
- }
-}
-
-#ifdef HAVE_MINGW
-static bool remove_service(void) {
- SC_HANDLE manager = NULL;
- SC_HANDLE service = NULL;
- SERVICE_STATUS status = {0};
-
- manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
- if(!manager) {
- fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
- return false;
- }
-
- service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
-
- if(!service) {
- fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
- return false;
- }
-
- if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
- fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
- else
- fprintf(stderr, "%s service stopped\n", identname);
-
- if(!DeleteService(service)) {
- fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
- return false;
- }
-
- fprintf(stderr, "%s service removed\n", identname);
-
- return true;
-}
-#endif
-
-bool connect_tincd(bool verbose) {
- if(fd >= 0) {
- fd_set r;
- FD_ZERO(&r);
- FD_SET(fd, &r);
- struct timeval tv = {0, 0};
- if(select(fd + 1, &r, NULL, NULL, &tv)) {
- fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
- close(fd);
- fd = -1;
- } else {
- return true;
- }
- }
-
- FILE *f = fopen(pidfilename, "r");
- if(!f) {
- if(verbose)
- fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
- return false;
- }
-
- char host[129];
- char port[129];
-
- if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
- if(verbose)
- fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
- fclose(f);
- return false;
- }
-
- fclose(f);
-
-#ifndef HAVE_MINGW
- struct sockaddr_un sa;
- sa.sun_family = AF_UNIX;
- strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
-
- fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if(fd < 0) {
- if(verbose)
- fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
- return false;
- }
-
- if(connect(fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
- if(verbose)
- fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
- close(fd);
- fd = -1;
- return false;
- }
-#else
- struct addrinfo hints = {
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_STREAM,
- .ai_protocol = IPPROTO_TCP,
- .ai_flags = 0,
- };
-
- struct addrinfo *res = NULL;
-
- if(getaddrinfo(host, port, &hints, &res) || !res) {
- if(verbose)
- fprintf(stderr, "Cannot resolve %s port %s: %s", host, port, strerror(errno));
- return false;
- }
-
- fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
- if(fd < 0) {
- if(verbose)
- fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
- return false;
- }
-
-#ifdef HAVE_MINGW
- unsigned long arg = 0;
-
- if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
- if(verbose)
- fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
- }
-#endif
-
- if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
- if(verbose)
- fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
- close(fd);
- fd = -1;
- return false;
- }
-
- freeaddrinfo(res);
-#endif
-
-#ifdef SO_NOSIGPIPE
- static const int one = 1;
- setsockopt(c, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof one);
-#endif
-
- char data[4096];
- int version;
-
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
- if(verbose)
- fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
- close(fd);
- fd = -1;
- return false;
- }
-
- sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
-
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
- if(verbose)
- fprintf(stderr, "Could not fully establish control socket connection\n");
- close(fd);
- fd = -1;
- return false;
- }
-
- return true;
-}
-
-
-static int cmd_start(int argc, char *argv[]) {
- if(connect_tincd(false)) {
- if(netname)
- fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
- else
- fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
- return 0;
- }
-
- char *c;
- char *slash = strrchr(program_name, '/');
-
-#ifdef HAVE_MINGW
- if ((c = strrchr(program_name, '\\')) > slash)
- slash = c;
-#endif
-
- if (slash++)
- xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
- else
- c = "tincd";
-
- int nargc = 0;
- char **nargv = xzalloc((optind + argc) * sizeof *nargv);
-
- nargv[nargc++] = c;
- for(int i = 1; i < optind; i++)
- nargv[nargc++] = orig_argv[i];
- for(int i = 1; i < argc; i++)
- nargv[nargc++] = argv[i];
-
-#ifdef HAVE_MINGW
- execvp(c, nargv);
- fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
- return 1;
-#else
- pid_t pid = fork();
- if(pid == -1) {
- fprintf(stderr, "Could not fork: %s\n", strerror(errno));
- free(nargv);
- return 1;
- }
-
- if(!pid)
- exit(execvp(c, nargv));
-
- free(nargv);
-
- int status = -1, result;
-#ifdef SIGINT
- signal(SIGINT, SIG_IGN);
-#endif
- result = waitpid(pid, &status, 0);
-#ifdef SIGINT
- signal(SIGINT, SIG_DFL);
-#endif
-
- if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
- fprintf(stderr, "Error starting %s\n", c);
- return 1;
- }
-
- return 0;
-#endif
-}
-
-static int cmd_stop(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
-#ifndef HAVE_MINGW
- if(!connect_tincd(true)) {
- if(pid) {
- if(kill(pid, SIGTERM)) {
- fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
- return 1;
- }
-
- fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
- waitpid(pid, NULL, 0);
- return 0;
- }
-
- return 1;
- }
-
- sendline(fd, "%d %d", CONTROL, REQ_STOP);
-
- while(recvline(fd, line, sizeof line)) {
- // Wait for tincd to close the connection...
- }
-#else
- if(!remove_service())
- return 1;
-#endif
- close(fd);
- pid = 0;
- fd = -1;
-
- return 0;
-}
-
-static int cmd_restart(int argc, char *argv[]) {
- cmd_stop(1, argv);
- return cmd_start(argc, argv);
-}
-
-static int cmd_reload(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
- fprintf(stderr, "Could not reload configuration.\n");
- return 1;
- }
-
- return 0;
-
-}
-
-static int cmd_dump(int argc, char *argv[]) {
- bool only_reachable = false;
-
- if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
- if(strcasecmp(argv[2], "nodes")) {
- fprintf(stderr, "`reachable' only supported for nodes.\n");
- usage(true);
- return 1;
- }
- only_reachable = true;
- argv++;
- argc--;
- }
-
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- usage(true);
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- int do_graph = 0;
-
- if(!strcasecmp(argv[1], "nodes"))
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
- else if(!strcasecmp(argv[1], "edges"))
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
- else if(!strcasecmp(argv[1], "subnets"))
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
- else if(!strcasecmp(argv[1], "connections"))
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
- else if(!strcasecmp(argv[1], "graph")) {
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
- do_graph = 1;
- } else if(!strcasecmp(argv[1], "digraph")) {
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
- do_graph = 2;
- } else {
- fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
- usage(true);
- return 1;
- }
-
- if(do_graph == 1)
- printf("graph {\n");
- else if(do_graph == 2)
- printf("digraph {\n");
-
- while(recvline(fd, line, sizeof line)) {
- char node1[4096], node2[4096];
- int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
- if(n == 2) {
- if(do_graph && req == REQ_DUMP_NODES)
- continue;
- else {
- if(do_graph)
- printf("}\n");
- return 0;
- }
- }
- if(n < 2)
- break;
-
- char node[4096];
- char from[4096];
- char to[4096];
- char subnet[4096];
- char host[4096];
- char port[4096];
- char via[4096];
- char nexthop[4096];
- int cipher, digest, maclength, compression, distance, socket, weight;
- short int pmtu, minmtu, maxmtu;
- unsigned int options, status_int;
- node_status_t status;
- long int last_state_change;
-
- switch(req) {
- case REQ_DUMP_NODES: {
- int n = sscanf(line, "%*d %*d %s %s port %s %d %d %d %d %x %x %s %s %d %hd %hd %hd %ld", node, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
- if(n != 16) {
- fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
- return 1;
- }
-
- memcpy(&status, &status_int, sizeof status);
-
- if(do_graph) {
- const char *color = "black";
- if(!strcmp(host, "MYSELF"))
- color = "green";
- else if(!status.reachable)
- color = "red";
- else if(strcmp(via, node))
- color = "orange";
- else if(!status.validkey)
- color = "black";
- else if(minmtu > 0)
- color = "green";
- printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
- } else {
- if(only_reachable && !status.reachable)
- continue;
- printf("%s at %s port %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %hd (min %hd max %hd)\n",
- node, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
- }
- } break;
-
- case REQ_DUMP_EDGES: {
- int n = sscanf(line, "%*d %*d %s %s %s port %s %x %d", from, to, host, port, &options, &weight);
- if(n != 6) {
- fprintf(stderr, "Unable to parse edge dump from tincd.\n");
- return 1;
- }
-
- if(do_graph) {
- float w = 1 + 65536.0 / weight;
- if(do_graph == 1 && strcmp(node1, node2) > 0)
- printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
- else if(do_graph == 2)
- printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
- } else {
- printf("%s to %s at %s port %s options %x weight %d\n", from, to, host, port, options, weight);
- }
- } break;
-
- case REQ_DUMP_SUBNETS: {
- int n = sscanf(line, "%*d %*d %s %s", subnet, node);
- if(n != 2) {
- fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
- return 1;
- }
- printf("%s owner %s\n", strip_weight(subnet), node);
- } break;
-
- case REQ_DUMP_CONNECTIONS: {
- int n = sscanf(line, "%*d %*d %s %s port %s %x %d %x", node, host, port, &options, &socket, &status_int);
- if(n != 6) {
- fprintf(stderr, "Unable to parse connection dump from tincd.\n");
- return 1;
- }
- printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
- } break;
-
- default:
- fprintf(stderr, "Unable to parse dump from tincd.\n");
- return 1;
- }
- }
-
- fprintf(stderr, "Error receiving dump.\n");
- return 1;
-}
-
-static int cmd_purge(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- sendline(fd, "%d %d", CONTROL, REQ_PURGE);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
- fprintf(stderr, "Could not purge old information.\n");
- return 1;
- }
-
- return 0;
-}
-
-static int cmd_debug(int argc, char *argv[]) {
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- int debuglevel = atoi(argv[1]);
- int origlevel;
-
- sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
- fprintf(stderr, "Could not set debug level.\n");
- return 1;
- }
-
- fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
- return 0;
-}
-
-static int cmd_retry(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- sendline(fd, "%d %d", CONTROL, REQ_RETRY);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
- fprintf(stderr, "Could not retry outgoing connections.\n");
- return 1;
- }
-
- return 0;
-}
-
-static int cmd_connect(int argc, char *argv[]) {
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- if(!check_id(argv[1])) {
- fprintf(stderr, "Invalid name for node.\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
- fprintf(stderr, "Could not connect to %s.\n", argv[1]);
- return 1;
- }
-
- return 0;
-}
-
-static int cmd_disconnect(int argc, char *argv[]) {
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- if(!check_id(argv[1])) {
- fprintf(stderr, "Invalid name for node.\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
- if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
- fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
- return 1;
- }
-
- return 0;
-}
-
-static int cmd_top(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
-#ifdef HAVE_CURSES
- if(!connect_tincd(true))
- return 1;
-
- top(fd);
- return 0;
-#else
- fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
- return 1;
-#endif
-}
-
-static int cmd_pcap(int argc, char *argv[]) {
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
- return 0;
-}
-
-#ifdef SIGINT
-static void sigint_handler(int sig) {
- fprintf(stderr, "\n");
- shutdown(fd, SHUT_RDWR);
-}
-#endif
-
-static int cmd_log(int argc, char *argv[]) {
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
-#ifdef SIGINT
- signal(SIGINT, sigint_handler);
-#endif
-
- logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
-
-#ifdef SIGINT
- signal(SIGINT, SIG_DFL);
-#endif
-
- close(fd);
- fd = -1;
- return 0;
-}
-
-static int cmd_pid(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!connect_tincd(true) && !pid)
- return 1;
-
- printf("%d\n", pid);
- return 0;
-}
-
-int rstrip(char *value) {
- int len = strlen(value);
- while(len && strchr("\t\r\n ", value[len - 1]))
- value[--len] = 0;
- return len;
-}
-
-char *get_my_name(bool verbose) {
- FILE *f = fopen(tinc_conf, "r");
- if(!f) {
- if(verbose)
- fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
- return NULL;
- }
-
- char buf[4096];
- char *value;
- while(fgets(buf, sizeof buf, f)) {
- int len = strcspn(buf, "\t =");
- value = buf + len;
- value += strspn(value, "\t ");
- if(*value == '=') {
- value++;
- value += strspn(value, "\t ");
- }
- if(!rstrip(value))
- continue;
- buf[len] = 0;
- if(strcasecmp(buf, "Name"))
- continue;
- if(*value) {
- fclose(f);
- return strdup(value);
- }
- }
-
- fclose(f);
- if(verbose)
- fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
- return NULL;
-}
-
-const var_t variables[] = {
- /* Server configuration */
- {"AddressFamily", VAR_SERVER},
- {"AutoConnect", VAR_SERVER | VAR_SAFE},
- {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
- {"BindToInterface", VAR_SERVER},
- {"Broadcast", VAR_SERVER | VAR_SAFE},
- {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
- {"DecrementTTL", VAR_SERVER},
- {"Device", VAR_SERVER},
- {"DeviceType", VAR_SERVER},
- {"DirectOnly", VAR_SERVER},
- {"ECDSAPrivateKeyFile", VAR_SERVER},
- {"ExperimentalProtocol", VAR_SERVER},
- {"Forwarding", VAR_SERVER},
- {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
- {"Hostnames", VAR_SERVER},
- {"IffOneQueue", VAR_SERVER},
- {"Interface", VAR_SERVER},
- {"KeyExpire", VAR_SERVER},
- {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
- {"LocalDiscovery", VAR_SERVER},
- {"MACExpire", VAR_SERVER},
- {"MaxConnectionBurst", VAR_SERVER},
- {"MaxOutputBufferSize", VAR_SERVER},
- {"MaxTimeout", VAR_SERVER},
- {"Mode", VAR_SERVER | VAR_SAFE},
- {"Name", VAR_SERVER},
- {"PingInterval", VAR_SERVER},
- {"PingTimeout", VAR_SERVER},
- {"PriorityInheritance", VAR_SERVER},
- {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
- {"PrivateKeyFile", VAR_SERVER},
- {"ProcessPriority", VAR_SERVER},
- {"Proxy", VAR_SERVER},
- {"ReplayWindow", VAR_SERVER},
- {"ScriptsExtension", VAR_SERVER},
- {"ScriptsInterpreter", VAR_SERVER},
- {"StrictSubnets", VAR_SERVER},
- {"TunnelServer", VAR_SERVER},
- {"VDEGroup", VAR_SERVER},
- {"VDEPort", VAR_SERVER},
- /* Host configuration */
- {"Address", VAR_HOST | VAR_MULTIPLE},
- {"Cipher", VAR_SERVER | VAR_HOST},
- {"ClampMSS", VAR_SERVER | VAR_HOST},
- {"Compression", VAR_SERVER | VAR_HOST},
- {"Digest", VAR_SERVER | VAR_HOST},
- {"ECDSAPublicKey", VAR_HOST},
- {"ECDSAPublicKeyFile", VAR_SERVER | VAR_HOST},
- {"IndirectData", VAR_SERVER | VAR_HOST},
- {"MACLength", VAR_SERVER | VAR_HOST},
- {"PMTU", VAR_SERVER | VAR_HOST},
- {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
- {"Port", VAR_HOST},
- {"PublicKey", VAR_HOST | VAR_OBSOLETE},
- {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
- {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
- {"TCPOnly", VAR_SERVER | VAR_HOST},
- {"Weight", VAR_HOST | VAR_SAFE},
- {NULL, 0}
-};
-
-static int cmd_config(int argc, char *argv[]) {
- if(argc < 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- if(strcasecmp(argv[0], "config"))
- argv--, argc++;
-
- int action = -2;
- if(!strcasecmp(argv[1], "get")) {
- argv++, argc--;
- } else if(!strcasecmp(argv[1], "add")) {
- argv++, argc--, action = 1;
- } else if(!strcasecmp(argv[1], "del")) {
- argv++, argc--, action = -1;
- } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
- argv++, argc--, action = 0;
- }
-
- if(argc < 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- // Concatenate the rest of the command line
- strncpy(line, argv[1], sizeof line - 1);
- for(int i = 2; i < argc; i++) {
- strncat(line, " ", sizeof line - 1 - strlen(line));
- strncat(line, argv[i], sizeof line - 1 - strlen(line));
- }
-
- // Liberal parsing into node name, variable name and value.
- char *node = NULL;
- char *variable;
- char *value;
- int len;
-
- len = strcspn(line, "\t =");
- value = line + len;
- value += strspn(value, "\t ");
- if(*value == '=') {
- value++;
- value += strspn(value, "\t ");
- }
- line[len] = '\0';
- variable = strchr(line, '.');
- if(variable) {
- node = line;
- *variable++ = 0;
- } else {
- variable = line;
- }
-
- if(!*variable) {
- fprintf(stderr, "No variable given.\n");
- return 1;
- }
-
- if(action >= 0 && !*value) {
- fprintf(stderr, "No value for variable given.\n");
- return 1;
- }
-
- if(action < -1 && *value)
- action = 0;
-
- /* Some simple checks. */
- bool found = false;
- bool warnonremove = false;
-
- for(int i = 0; variables[i].name; i++) {
- if(strcasecmp(variables[i].name, variable))
- continue;
-
- found = true;
- variable = (char *)variables[i].name;
-
- /* Discourage use of obsolete variables. */
-
- if(variables[i].type & VAR_OBSOLETE && action >= 0) {
- if(force) {
- fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
- } else {
- fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
- return 1;
- }
- }
-
- /* Don't put server variables in host config files */
-
- if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
- if(force) {
- fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
- } else {
- fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
- return 1;
- }
- }
-
- /* Should this go into our own host config file? */
-
- if(!node && !(variables[i].type & VAR_SERVER)) {
- node = get_my_name(true);
- if(!node)
- return 1;
- }
-
- /* Change "add" into "set" for variables that do not allow multiple occurences.
- Turn on warnings when it seems variables might be removed unintentionally. */
-
- if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
- warnonremove = true;
- action = 0;
- } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
- warnonremove = true;
- }
-
- break;
- }
-
- if(node && !check_id(node)) {
- fprintf(stderr, "Invalid name for node.\n");
- return 1;
- }
-
- if(!found) {
- if(force || action < 0) {
- 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);
- return 1;
- }
- }
-
- // Open the right configuration file.
- char filename[PATH_MAX];
- if(node)
- snprintf(filename,PATH_MAX "%s" SLASH "%s", hosts_dir, node);
- else
- filename = tinc_conf;
-
- FILE *f = fopen(filename, "r");
- if(!f) {
- fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-
- char tmpfile[PATH_MAX];
- FILE *tf = NULL;
-
- if(action >= -1) {
- snprintf(tmpfile,PATH_MAX, "%s.config.tmp", filename);
- tf = fopen(tmpfile, "w");
- if(!tf) {
- fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
- fclose(f);
- return 1;
- }
- }
-
- // Copy the file, making modifications on the fly, unless we are just getting a value.
- char buf1[4096];
- char buf2[4096];
- bool set = false;
- bool removed = false;
- found = false;
-
- while(fgets(buf1, sizeof buf1, f)) {
- buf1[sizeof buf1 - 1] = 0;
- strncpy(buf2, buf1, sizeof buf2);
-
- // Parse line in a simple way
- char *bvalue;
- int len;
-
- len = strcspn(buf2, "\t =");
- bvalue = buf2 + len;
- bvalue += strspn(bvalue, "\t ");
- if(*bvalue == '=') {
- bvalue++;
- bvalue += strspn(bvalue, "\t ");
- }
- rstrip(bvalue);
- buf2[len] = '\0';
-
- // Did it match?
- if(!strcasecmp(buf2, variable)) {
- // Get
- if(action < -1) {
- found = true;
- printf("%s\n", bvalue);
- // Del
- } else if(action == -1) {
- if(!*value || !strcasecmp(bvalue, value)) {
- removed = true;
- continue;
- }
- // Set
- } else if(action == 0) {
- // Warn if "set" was used for variables that can occur multiple times
- if(warnonremove && strcasecmp(bvalue, value))
- fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
-
- // Already set? Delete the rest...
- if(set)
- continue;
-
- // Otherwise, replace.
- if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
- fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
- return 1;
- }
- set = true;
- continue;
- }
- }
-
- if(action >= -1) {
- // Copy original line...
- if(fputs(buf1, tf) < 0) {
- fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
- return 1;
- }
-
- // Add newline if it is missing...
- if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
- if(fputc('\n', tf) < 0) {
- fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
- return 1;
- }
- }
- }
- }
-
- // Make sure we read everything...
- if(ferror(f) || !feof(f)) {
- fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-
- if(fclose(f)) {
- fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-
- // Add new variable if necessary.
- if(action > 0 || (action == 0 && !set)) {
- if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
- fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
- return 1;
- }
- }
-
- if(action < -1) {
- if(!found)
- fprintf(stderr, "No matching configuration variables found.\n");
- return 0;
- }
-
- // Make sure we wrote everything...
- if(fclose(tf)) {
- fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
- return 1;
- }
-
- // Could we find what we had to remove?
- if(action < 0 && !removed) {
- remove(tmpfile);
- fprintf(stderr, "No configuration variables deleted.\n");
- return *value != 0;
- }
-
- // Replace the configuration file with the new one
-#ifdef HAVE_MINGW
- if(remove(filename)) {
- fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-#endif
- if(rename(tmpfile, filename)) {
- fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
- return 1;
- }
-
- // Silently try notifying a running tincd of changes.
- if(connect_tincd(false))
- sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
-
- return 0;
-}
-
-bool check_id(const char *name) {
- if(!name || !*name)
- return false;
-
- for(int i = 0; i < strlen(name); i++) {
- if(!isalnum(name[i]) && name[i] != '_')
- return false;
- }
-
- return true;
-}
-
-static bool try_bind(int port) {
- struct addrinfo *ai = NULL;
- struct addrinfo hint = {
- .ai_flags = AI_PASSIVE,
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_STREAM,
- .ai_protocol = IPPROTO_TCP,
- };
-
- char portstr[16];
- snprintf(portstr, sizeof portstr, "%d", port);
-
- if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
- return false;
-
- while(ai) {
- int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
- if(!fd)
- return false;
- int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
- closesocket(fd);
- if(result)
- return false;
- ai = ai->ai_next;
- }
-
- return true;
-}
-
-int check_port(char *name) {
- if(try_bind(655))
- return 655;
-
- fprintf(stderr, "Warning: could not bind to port 655. ");
-
- for(int i = 0; i < 100; i++) {
- int port = 0x1000 + (rand() & 0x7fff);
- if(try_bind(port)) {
- char filename[PATH_MAX];
- snprintf(filename,PATH_MAX "%s" SLASH "hosts" SLASH "%s", confbase, name);
- FILE *f = fopen(filename, "a");
- if(!f) {
- fprintf(stderr, "Please change tinc's Port manually.\n");
- return 0;
- }
-
- fprintf(f, "Port = %d\n", port);
- fclose(f);
- fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
- return port;
- }
- }
-
- fprintf(stderr, "Please change tinc's Port manually.\n");
- return 0;
-}
-
-static int cmd_init(int argc, char *argv[]) {
- if(!access(tinc_conf, F_OK)) {
- fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
- return 1;
- }
-
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- } else if(argc < 2) {
- if(tty) {
- char buf[1024];
- fprintf(stderr, "Enter the Name you want your tinc node to have: ");
- if(!fgets(buf, sizeof buf, stdin)) {
- fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
- return 1;
- }
- int len = rstrip(buf);
- if(!len) {
- fprintf(stderr, "No name given!\n");
- return 1;
- }
- name = strdup(buf);
- } else {
- fprintf(stderr, "No Name given!\n");
- return 1;
- }
- } else {
- name = strdup(argv[1]);
- if(!*name) {
- fprintf(stderr, "No Name given!\n");
- return 1;
- }
- }
-
- if(!check_id(name)) {
- fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
- return 1;
- }
-
- if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
- return 1;
- }
-
- if(mkdir(confbase, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
- return 1;
- }
-
- if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
- return 1;
- }
-
- FILE *f = fopen(tinc_conf, "w");
- if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
- return 1;
- }
-
- fprintf(f, "Name = %s\n", name);
- fclose(f);
-
- if(!rsa_keygen(2048, false) || !ecdsa_keygen(false))
- return 1;
-
- check_port(name);
-
-#ifndef HAVE_MINGW
- char *filename;
- xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
- if(access(filename, F_OK)) {
- FILE *f = fopenmask(filename, "w", 0777);
- if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
- return 1;
- }
- fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit '$0'!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
- fclose(f);
- }
-#endif
-
- return 0;
-
-}
-
-static int cmd_generate_keys(int argc, char *argv[]) {
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!name)
- name = get_my_name(false);
-
- return !(rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true) && ecdsa_keygen(true));
-}
-
-static int cmd_generate_rsa_keys(int argc, char *argv[]) {
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!name)
- name = get_my_name(false);
-
- return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
-}
-
-static int cmd_generate_ecdsa_keys(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(!name)
- name = get_my_name(false);
-
- return !ecdsa_keygen(true);
-}
-
-static int cmd_help(int argc, char *argv[]) {
- usage(false);
- return 0;
-}
-
-static int cmd_version(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- version();
- return 0;
-}
-
-static int cmd_info(int argc, char *argv[]) {
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- if(!connect_tincd(true))
- return 1;
-
- return info(fd, argv[1]);
-}
-
-static const char *conffiles[] = {
- "tinc.conf",
- "tinc-up",
- "tinc-down",
- "subnet-up",
- "subnet-down",
- "host-up",
- "host-down",
- NULL,
-};
-
-static int cmd_edit(int argc, char *argv[]) {
- if(argc != 2) {
- fprintf(stderr, "Invalid number of arguments.\n");
- return 1;
- }
-
- char *filename = NULL;
-
- if(strncmp(argv[1], "hosts" SLASH, 6)) {
- for(int i = 0; conffiles[i]; i++) {
- if(!strcmp(argv[1], conffiles[i])) {
- xasprintf(&filename, "%s" SLASH "%s", confbase, argv[1]);
- break;
- }
- }
- } else {
- argv[1] += 6;
- }
-
- if(!filename) {
- xasprintf(&filename, "%s" SLASH "%s", hosts_dir, argv[1]);
- char *dash = strchr(argv[1], '-');
- if(dash) {
- *dash++ = 0;
- if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
- fprintf(stderr, "Invalid configuration filename.\n");
- return 1;
- }
- }
- }
-
- char *command;
-#ifndef HAVE_MINGW
- xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
-#else
- xasprintf(&command, "edit \"%s\"", filename);
-#endif
- int result = system(command);
- if(result)
- return result;
-
- // Silently try notifying a running tincd of changes.
- if(connect_tincd(false))
- sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
-
- return 0;
-}
-
-static int export(const char *name, FILE *out) {
- char *filename;
- xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
- FILE *in = fopen(filename, "r");
- if(!in) {
- fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-
- fprintf(out, "Name = %s\n", name);
- char buf[4096];
- while(fgets(buf, sizeof buf, in)) {
- if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4))
- fputs(buf, out);
- }
-
- if(ferror(in)) {
- fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
- fclose(in);
- return 1;
- }
-
- fclose(in);
- return 0;
-}
-
-static int cmd_export(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- char *name = get_my_name(true);
- if(!name)
- return 1;
-
- int result = export(name, stdout);
- if(!tty)
- fclose(stdout);
-
- free(name);
- return result;
-}
-
-static int cmd_export_all(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- DIR *dir = opendir(hosts_dir);
- if(!dir) {
- fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
- return 1;
- }
-
- bool first = true;
- int result = 0;
- struct dirent *ent;
-
- while((ent = readdir(dir))) {
- if(!check_id(ent->d_name))
- continue;
-
- if(first)
- first = false;
- else
- printf("#---------------------------------------------------------------#\n");
-
- result |= export(ent->d_name, stdout);
- }
-
- closedir(dir);
- if(!tty)
- fclose(stdout);
- return result;
-}
-
-static int cmd_import(int argc, char *argv[]) {
- if(argc > 1) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- FILE *in = stdin;
- FILE *out = NULL;
-
- char buf[4096];
- char name[4096];
- char *filename = NULL;
- int count = 0;
- bool firstline = true;
-
- while(fgets(buf, sizeof buf, in)) {
- if(sscanf(buf, "Name = %s", name) == 1) {
- firstline = false;
-
- if(!check_id(name)) {
- fprintf(stderr, "Invalid Name in input!\n");
- return 1;
- }
-
- if(out)
- fclose(out);
-
- free(filename);
- xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
-
- if(!force && !access(filename, F_OK)) {
- fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
- out = NULL;
- continue;
- }
-
- out = fopen(filename, "w");
- if(!out) {
- fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
-
- count++;
- continue;
- } else if(firstline) {
- fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
- firstline = false;
- }
-
-
- if(!strcmp(buf, "#---------------------------------------------------------------#\n"))
- continue;
-
- if(out) {
- if(fputs(buf, out) < 0) {
- fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
- return 1;
- }
- }
- }
-
- if(out)
- fclose(out);
-
- if(count) {
- fprintf(stderr, "Imported %d host configuration files.\n", count);
- return 0;
- } else {
- fprintf(stderr, "No host configuration files imported.\n");
- return 1;
- }
-}
-
-static int cmd_exchange(int argc, char *argv[]) {
- return cmd_export(argc, argv) ?: cmd_import(argc, argv);
-}
-
-static int cmd_exchange_all(int argc, char *argv[]) {
- return cmd_export_all(argc, argv) ?: cmd_import(argc, argv);
-}
-
-static int switch_network(char *name) {
- if(fd >= 0) {
- close(fd);
- fd = -1;
- }
-
- free(confbase);
- confbase = NULL;
- free(pidfilename);
- pidfilename = NULL;
- free(logfilename);
- logfilename = NULL;
- free(unixsocketname);
- unixsocketname = NULL;
- free(tinc_conf);
- free(hosts_dir);
- free(prompt);
-
- free(netname);
- netname = strcmp(name, ".") ? xstrdup(name) : NULL;
-
- xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
- xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
- xasprintf(&prompt, "%s> ", identname);
-
- return 0;
-}
-
-static int cmd_network(int argc, char *argv[]) {
- if(argc > 2) {
- fprintf(stderr, "Too many arguments!\n");
- return 1;
- }
-
- if(argc == 2)
- return switch_network(argv[1]);
-
- DIR *dir = opendir(confdir);
- if(!dir) {
- fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
- return 1;
- }
-
- struct dirent *ent;
- while((ent = readdir(dir))) {
- if(*ent->d_name == '.')
- continue;
-
- if(!strcmp(ent->d_name, "tinc.conf")) {
- printf(".\n");
- continue;
- }
-
- char *fname;
- xasprintf(&fname, "%s/%s/tinc.conf", confdir, ent->d_name);
- if(!access(fname, R_OK))
- printf("%s\n", ent->d_name);
- free(fname);
- }
-
- return 0;
-}
-
-static const struct {
- const char *command;
- int (*function)(int argc, char *argv[]);
- bool hidden;
-} commands[] = {
- {"start", cmd_start},
- {"stop", cmd_stop},
- {"restart", cmd_restart},
- {"reload", cmd_reload},
- {"dump", cmd_dump},
- {"purge", cmd_purge},
- {"debug", cmd_debug},
- {"retry", cmd_retry},
- {"connect", cmd_connect},
- {"disconnect", cmd_disconnect},
- {"top", cmd_top},
- {"pcap", cmd_pcap},
- {"log", cmd_log},
- {"pid", cmd_pid},
- {"config", cmd_config, true},
- {"add", cmd_config},
- {"del", cmd_config},
- {"get", cmd_config},
- {"set", cmd_config},
- {"init", cmd_init},
- {"generate-keys", cmd_generate_keys},
- {"generate-rsa-keys", cmd_generate_rsa_keys},
- {"generate-ecdsa-keys", cmd_generate_ecdsa_keys},
- {"help", cmd_help},
- {"version", cmd_version},
- {"info", cmd_info},
- {"edit", cmd_edit},
- {"export", cmd_export},
- {"export-all", cmd_export_all},
- {"import", cmd_import},
- {"exchange", cmd_exchange},
- {"exchange-all", cmd_exchange_all},
- {"invite", cmd_invite},
- {"join", cmd_join},
- {"network", cmd_network},
- {NULL, NULL},
-};
-
-#ifdef HAVE_READLINE
-static char *complete_command(const char *text, int state) {
- static int i;
-
- if(!state)
- i = 0;
- else
- i++;
-
- while(commands[i].command) {
- if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text)))
- return xstrdup(commands[i].command);
- i++;
- }
-
- return NULL;
-}
-
-static char *complete_dump(const char *text, int state) {
- const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
- static int i;
-
- if(!state)
- i = 0;
- else
- i++;
-
- while(matches[i]) {
- if(!strncasecmp(matches[i], text, strlen(text)))
- return xstrdup(matches[i]);
- i++;
- }
-
- return NULL;
-}
-
-static char *complete_config(const char *text, int state) {
- static int i;
-
- if(!state)
- i = 0;
- else
- i++;
-
- while(variables[i].name) {
- char *dot = strchr(text, '.');
- if(dot) {
- if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
- char *match;
- xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
- return match;
- }
- } else {
- if(!strncasecmp(variables[i].name, text, strlen(text)))
- return xstrdup(variables[i].name);
- }
- i++;
- }
-
- return NULL;
-}
-
-static char *complete_info(const char *text, int state) {
- static int i;
- if(!state) {
- i = 0;
- if(!connect_tincd(false))
- return NULL;
- // Check the list of nodes
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
- sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
- }
-
- while(recvline(fd, line, sizeof line)) {
- char item[4096];
- int n = sscanf(line, "%d %d %s", &code, &req, item);
- if(n == 2) {
- i++;
- if(i >= 2)
- break;
- else
- continue;
- }
-
- if(n != 3) {
- fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
- break;
- }
-
- if(!strncmp(item, text, strlen(text)))
- return xstrdup(strip_weight(item));
- }
-
- return NULL;
-}
-
-static char *complete_nothing(const char *text, int state) {
- return NULL;
-}
-
-static char **completion (const char *text, int start, int end) {
- char **matches = NULL;
-
- if(!start)
- matches = rl_completion_matches(text, complete_command);
- else if(!strncasecmp(rl_line_buffer, "dump ", 5))
- matches = rl_completion_matches(text, complete_dump);
- else if(!strncasecmp(rl_line_buffer, "add ", 4))
- matches = rl_completion_matches(text, complete_config);
- else if(!strncasecmp(rl_line_buffer, "del ", 4))
- matches = rl_completion_matches(text, complete_config);
- else if(!strncasecmp(rl_line_buffer, "get ", 4))
- matches = rl_completion_matches(text, complete_config);
- else if(!strncasecmp(rl_line_buffer, "set ", 4))
- matches = rl_completion_matches(text, complete_config);
- else if(!strncasecmp(rl_line_buffer, "info ", 5))
- matches = rl_completion_matches(text, complete_info);
-
- return matches;
-}
-#endif
-
-static int cmd_shell(int argc, char *argv[]) {
- xasprintf(&prompt, "%s> ", identname);
- int result = 0;
- char buf[4096];
- char *line = NULL;
- int maxargs = argc + 16;
- char **nargv = xmalloc(maxargs * sizeof *nargv);
-
- for(int i = 0; i < argc; i++)
- nargv[i] = argv[i];
-
-#ifdef HAVE_READLINE
- rl_readline_name = "tinc";
- rl_completion_entry_function = complete_nothing;
- rl_attempted_completion_function = completion;
- rl_filename_completion_desired = 0;
- char *copy = NULL;
-#endif
-
- while(true) {
-#ifdef HAVE_READLINE
- if(tty) {
- free(copy);
- free(line);
- rl_basic_word_break_characters = "\t\n ";
- line = readline(prompt);
- if(line)
- copy = xstrdup(line);
- } else {
- line = fgets(buf, sizeof buf, stdin);
- }
-#else
- if(tty)
- fputs(prompt, stdout);
-
- line = fgets(buf, sizeof buf, stdin);
-#endif
-
- if(!line)
- break;
-
- /* Ignore comments */
-
- if(*line == '#')
- continue;
-
- /* Split */
-
- int nargc = argc;
- char *p = line + strspn(line, " \t\n");
- char *next = strtok(p, " \t\n");
-
- while(p && *p) {
- if(nargc >= maxargs) {
- fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
- abort();
- maxargs *= 2;
- nargv = xrealloc(nargv, maxargs * sizeof *nargv);
- }
-
- nargv[nargc++] = p;
- p = next;
- next = strtok(NULL, " \t\n");
- }
-
- if(nargc == argc)
- continue;
-
- if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit"))
- return result;
-
- bool found = false;
-
- for(int i = 0; commands[i].command; i++) {
- if(!strcasecmp(nargv[argc], commands[i].command)) {
- result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
- found = true;
- break;
- }
- }
-
-#ifdef HAVE_READLINE
- if(tty && found)
- add_history(copy);
-#endif
-
- if(!found) {
- fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
- result |= 1;
- }
- }
-
- free(nargv);
-
- if(tty)
- printf("\n");
- return result;
-}
-
-
-int main(int argc, char *argv[]) {
- program_name = argv[0];
- orig_argv = argv;
- orig_argc = argc;
-
- if(!parse_options(argc, argv))
- return 1;
-
- xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
- xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
-
- if(show_version) {
- version();
- return 0;
- }
-
- if(show_help) {
- usage(false);
- return 0;
- }
-
-#ifdef HAVE_MINGW
- static struct WSAData wsa_state;
-
- if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
- fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
- return false;
- }
-#endif
-
- srand(time(NULL));
- crypto_init();
-
- tty = isatty(0) && isatty(1);
-
- if(optind >= argc)
- return cmd_shell(argc, argv);
-
- for(int i = 0; commands[i].command; i++) {
- if(!strcasecmp(argv[optind], commands[i].command))
- return commands[i].function(argc - optind, argv + optind);
- }
-
- fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);
- usage(true);
- return 1;
-}
projects / meshlink / blobdiff