tinc/src/tincctl.c

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/*
tincctl.c -- Controlling a running tincd
Copyright (C) 2007-2012 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
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 "ecdsagen.h"
#include "info.h"
#include "rsagen.h"
#include "utils.h"
#include "tincctl.h"
#include "top.h"
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#ifdef HAVE_MINGW
#define mkdir(a, b) mkdir(a)
#endif
/* The name this program was run with. */
static char *program_name = NULL;
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;
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static char *identname = NULL; /* program name for syslog */
static char *pidfilename = NULL; /* pid file location */
static char *confdir = NULL;
static char controlcookie[1024];
char *netname = NULL;
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char *confbase = NULL;
static char *tinc_conf = NULL;
static char *hosts_dir = NULL;
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// Horrible global variables...
static int pid = 0;
static int fd = -1;
static char line[4096];
static int code;
static int req;
static int result;
static bool force = false;
static bool tty = true;
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#ifdef HAVE_MINGW
static struct WSAData wsa_state;
#endif
static struct option const long_options[] = {
{"config", required_argument, NULL, 'c'},
{"debug", optional_argument, NULL, 0},
{"no-detach", no_argument, NULL, 0},
{"mlock", no_argument, NULL, 0},
{"net", required_argument, NULL, 'n'},
{"help", no_argument, NULL, 1},
{"version", no_argument, NULL, 2},
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{"pidfile", required_argument, NULL, 5},
{"logfile", required_argument, NULL, 0},
{"bypass-security", no_argument, NULL, 0},
{"chroot", no_argument, NULL, 0},
{"user", required_argument, NULL, 0},
{"option", required_argument, NULL, 0},
{"force", no_argument, NULL, 6},
{NULL, 0, NULL, 0}
};
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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"
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" -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"
" config Change configuration:\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 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"
" 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"
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" 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"
"\n");
printf("Report bugs to tinc@tinc-vpn.org.\n");
}
}
static bool parse_options(int argc, char **argv) {
int r;
int option_index = 0;
while((r = getopt_long(argc, argv, "c:n:Dd::Lo:RU:", long_options, &option_index)) != EOF) {
switch (r) {
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case 0: /* long option */
break;
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case 'c': /* config file */
confbase = xstrdup(optarg);
break;
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case 'n': /* net name given */
netname = xstrdup(optarg);
break;
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case 1: /* show help */
show_help = true;
break;
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case 2: /* show version */
show_version = true;
break;
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case 5: /* open control socket here */
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pidfilename = xstrdup(optarg);
break;
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case 6: /* force */
force = true;
break;
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case '?': /* wrong options */
usage(true);
return false;
default:
break;
}
}
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if(!netname && (netname = getenv("NETNAME")))
netname = xstrdup(netname);
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/* netname "." is special: a "top-level name" */
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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;
}
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);
w = fopen(tmpfile, "w");
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) {
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FILE *r;
char *directory;
char buf[PATH_MAX];
char buf2[PATH_MAX];
/* Check stdin and stdout */
if(ask && tty) {
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/* Ask for a file and/or directory name. */
fprintf(stdout, "Please enter a file to save %s to [%s]: ",
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what, filename);
fflush(stdout);
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if(fgets(buf, sizeof buf, stdin) == NULL) {
fprintf(stderr, "Error while reading stdin: %s\n",
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strerror(errno));
return NULL;
}
size_t len = strlen(buf);
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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);
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filename = buf2;
}
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umask(0077); /* Disallow everything for group and other */
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disable_old_keys(filename, what);
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/* Open it first to keep the inode busy */
r = fopen(filename, mode);
if(!r) {
fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
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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;
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char *pubname, *privname;
fprintf(stderr, "Generating ECDSA keypair:\n");
if(!ecdsa_generate(&key)) {
fprintf(stderr, "Error during key generation!\n");
return false;
} else
fprintf(stderr, "Done.\n");
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xasprintf(&privname, "%s" SLASH "ecdsa_key.priv", confbase);
f = ask_and_open(privname, "private ECDSA key", "a", ask);
free(privname);
if(!f)
return false;
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#ifdef HAVE_FCHMOD
/* Make it unreadable for others. */
fchmod(fileno(f), 0600);
#endif
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ecdsa_write_pem_private_key(&key, f);
fclose(f);
if(name)
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xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
else
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xasprintf(&pubname, "%s" SLASH "ecdsa_key.pub", confbase);
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f = ask_and_open(pubname, "public ECDSA key", "a", ask);
free(pubname);
if(!f)
return false;
char *pubkey = ecdsa_get_base64_public_key(&key);
fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
free(pubkey);
fclose(f);
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;
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char *pubname, *privname;
fprintf(stderr, "Generating %d bits keys:\n", bits);
if(!rsa_generate(&key, bits, 0x10001)) {
fprintf(stderr, "Error during key generation!\n");
return false;
} else
fprintf(stderr, "Done.\n");
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xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
f = ask_and_open(privname, "private RSA key", "a", ask);
free(privname);
if(!f)
return false;
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#ifdef HAVE_FCHMOD
/* Make it unreadable for others. */
fchmod(fileno(f), 0600);
#endif
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rsa_write_pem_private_key(&key, f);
fclose(f);
if(name)
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xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
else
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xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
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f = ask_and_open(pubname, "public RSA key", "a", ask);
free(pubname);
if(!f)
return false;
rsa_write_pem_public_key(&key, f);
fclose(f);
return true;
}
/*
Set all files and paths according to netname
*/
static void make_names(void) {
#ifdef HAVE_MINGW
HKEY key;
char installdir[1024] = "";
long len = sizeof installdir;
#endif
if(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(!confbase) {
if(netname)
xasprintf(&confbase, "%s" SLASH "%s", installdir, netname);
else
xasprintf(&confbase, "%s", installdir);
}
}
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if(!pidfilename)
xasprintf(&pidfilename, "%s" SLASH "pid", confbase);
RegCloseKey(key);
}
if(!*installdir) {
#endif
confdir = xstrdup(CONFDIR);
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if(!pidfilename)
xasprintf(&pidfilename, "%s" SLASH "run" SLASH "%s.pid", LOCALSTATEDIR, identname);
if(netname) {
if(!confbase)
xasprintf(&confbase, CONFDIR SLASH "tinc" SLASH "%s", netname);
else
fprintf(stderr, "Both netname and configuration directory given, using the latter...\n");
} else {
if(!confbase)
xasprintf(&confbase, CONFDIR SLASH "tinc");
}
#ifdef HAVE_MINGW
} else
confdir = xstrdup(installdir);
#endif
xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
}
static char buffer[4096];
static size_t blen = 0;
bool recvline(int fd, char *line, size_t len) {
char *newline = NULL;
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;
}
static bool recvdata(int fd, char *data, size_t len) {
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;
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int blen = 0;
va_list ap;
va_start(ap, format);
blen = vsnprintf(buffer, sizeof buffer, format, ap);
va_end(ap);
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if(blen < 1 || blen >= sizeof buffer)
return false;
buffer[blen] = '\n';
blen++;
while(blen) {
int result = send(fd, p, blen, 0);
if(result == -1 && errno == EINTR)
continue;
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else if(result <= 0)
return false;
p += result;
blen -= result;
}
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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
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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
static 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;
}
}
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FILE *f = fopen(pidfilename, "r");
if(!f) {
if(verbose)
fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
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return false;
}
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char host[128];
char port[128];
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);
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return false;
}
fclose(f);
#ifdef HAVE_MINGW
if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
if(verbose)
fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
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return false;
}
#endif
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));
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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));
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return false;
}
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#ifdef HAVE_MINGW
unsigned long arg = 0;
if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
if(verbose)
fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
}
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#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;
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return false;
}
freeaddrinfo(res);
char data[4096];
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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;
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return false;
}
sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
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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;
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return false;
}
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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;
}
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char *c;
char *slash = strrchr(program_name, '/');
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#ifdef HAVE_MINGW
if ((c = strrchr(program_name, '\\')) > slash)
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slash = c;
#endif
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if (slash++)
xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
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else
c = "tincd";
int nargc = 0;
char **nargv = xmalloc_and_zero((optind + argc) * sizeof *nargv);
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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));
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return 1;
#else
pid_t pid = fork();
if(pid == -1) {
fprintf(stderr, "Could not fork: %s\n", strerror(errno));
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free(nargv);
return 1;
}
if(!pid)
exit(execvp(c, nargv));
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free(nargv);
int status = -1;
if(waitpid(pid, &status, 0) != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
fprintf(stderr, "Error starting %s\n", c);
return 1;
}
return 0;
#endif
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}
static int cmd_stop(int argc, char *argv[]) {
#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;
}
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return 1;
}
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sendline(fd, "%d %d", CONTROL, REQ_STOP);
if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_STOP || result) {
fprintf(stderr, "Could not stop tinc daemon.\n");
return 1;
}
// Wait for tincd to close the connection...
fd_set r;
FD_ZERO(&r);
FD_SET(fd, &r);
select(fd + 1, &r, NULL, NULL, NULL);
#else
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if(!remove_service())
return 1;
#endif
close(fd);
pid = 0;
fd = -1;
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return 0;
}
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static int cmd_restart(int argc, char *argv[]) {
cmd_stop(argc, argv);
return cmd_start(argc, argv);
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}
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static int cmd_reload(int argc, char *argv[]) {
if(!connect_tincd(true))
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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;
}
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return 0;
}
static int cmd_dump(int argc, char *argv[]) {
if(argc != 2) {
fprintf(stderr, "Invalid number of arguments.\n");
usage(true);
return 1;
}
if(!connect_tincd(true))
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return 1;
int do_graph = 0;
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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;
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} 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)
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printf("digraph {\n");
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while(recvline(fd, line, sizeof line)) {
char node1[4096], node2[4096];
int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
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if(n == 2) {
if(do_graph && req == REQ_DUMP_NODES)
continue;
else {
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if(do_graph)
printf("}\n");
return 0;
}
}
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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;
}
if(do_graph) {
memcpy(&status, &status_int, sizeof status);
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 {
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;
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}
}
fprintf(stderr, "Error receiving dump.\n");
return 1;
}
static int cmd_purge(int argc, char *argv[]) {
if(!connect_tincd(true))
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return 1;
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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;
}
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return 0;
}
static int cmd_debug(int argc, char *argv[]) {
if(argc != 2) {
fprintf(stderr, "Invalid number of arguments.\n");
return 1;
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}
if(!connect_tincd(true))
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return 1;
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int debuglevel = atoi(argv[1]);
int origlevel;
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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;
}
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fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
return 0;
}
static int cmd_retry(int argc, char *argv[]) {
if(!connect_tincd(true))
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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;
}
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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])) {
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fprintf(stderr, "Invalid name for node.\n");
return 1;
}
if(!connect_tincd(true))
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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])) {
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fprintf(stderr, "Invalid name for node.\n");
return 1;
}
if(!connect_tincd(true))
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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[]) {
#ifdef HAVE_CURSES
if(!connect_tincd(true))
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return 1;
top(fd);
return 0;
#else
fprintf(stderr, "This version of tincctl was compiled without support for the curses library.\n");
return 1;
#endif
}
static int cmd_pcap(int argc, char *argv[]) {
if(!connect_tincd(true))
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return 1;
pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
return 0;
}
static int cmd_log(int argc, char *argv[]) {
if(!connect_tincd(true))
2012-07-15 13:46:16 +00:00
return 1;
logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
return 0;
}
static int cmd_pid(int argc, char *argv[]) {
if(!connect_tincd(true) && !pid)
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return 1;
printf("%d\n", pid);
return 0;
}
static int rstrip(char *value) {
int len = strlen(value);
while(len && strchr("\t\r\n ", value[len - 1]))
value[--len] = 0;
return len;
}
static char *get_my_name() {
FILE *f = fopen(tinc_conf, "r");
if(!f) {
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);
fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
return NULL;
}
#define VAR_SERVER 1 /* Should be in tinc.conf */
#define VAR_HOST 2 /* Can be in host config file */
#define VAR_MULTIPLE 4 /* Multiple statements allowed */
#define VAR_OBSOLETE 8 /* Should not be used anymore */
static struct {
const char *name;
int type;
} const variables[] = {
/* Server configuration */
{"AddressFamily", VAR_SERVER},
{"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
{"BindToInterface", VAR_SERVER},
{"Broadcast", VAR_SERVER},
{"ConnectTo", VAR_SERVER | VAR_MULTIPLE},
{"DecrementTTL", VAR_SERVER},
{"Device", VAR_SERVER},
{"DeviceType", VAR_SERVER},
{"DirectOnly", VAR_SERVER},
{"ECDSAPrivateKeyFile", VAR_SERVER},
{"ExperimentalProtocol", VAR_SERVER},
{"Forwarding", VAR_SERVER},
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{"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
{"Hostnames", VAR_SERVER},
{"IffOneQueue", VAR_SERVER},
{"Interface", VAR_SERVER},
{"KeyExpire", VAR_SERVER},
{"LocalDiscovery", VAR_SERVER},
{"MACExpire", VAR_SERVER},
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{"MaxOutputBufferSize", VAR_SERVER},
{"MaxTimeout", VAR_SERVER},
{"Mode", VAR_SERVER},
{"Name", VAR_SERVER},
{"PingInterval", VAR_SERVER},
{"PingTimeout", VAR_SERVER},
{"PriorityInheritance", VAR_SERVER},
{"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
{"PrivateKeyFile", VAR_SERVER},
{"ProcessPriority", VAR_SERVER},
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{"Proxy", VAR_SERVER},
{"ReplayWindow", VAR_SERVER},
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{"ScriptsExtension", VAR_SERVER},
{"ScriptsInterpreter", VAR_SERVER},
{"StrictSubnets", VAR_SERVER},
{"TunnelServer", VAR_SERVER},
{"UDPRcvBuf", VAR_SERVER},
{"UDPSndBuf", VAR_SERVER},
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{"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},
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{"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},
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{"PublicKey", VAR_HOST | VAR_OBSOLETE},
{"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
{"Subnet", VAR_HOST | VAR_MULTIPLE},
{"TCPOnly", VAR_SERVER | VAR_HOST},
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{"Weight", VAR_HOST},
{NULL, 0}
};
static int cmd_config(int argc, char *argv[]) {
if(argc < 2) {
fprintf(stderr, "Invalid number of arguments.\n");
return 1;
}
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;
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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;
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();
if(!node)
return 1;
}
break;
}
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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;
if(node)
xasprintf(&filename, "%s" SLASH "%s", hosts_dir, node);
else
filename = tinc_conf;
FILE *f = fopen(filename, "r");
if(!f) {
if(action < 0 || errno != ENOENT) {
fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
return 1;
}
// If it doesn't exist, create it.
f = fopen(filename, "a+");
if(!f) {
fprintf(stderr, "Could not create configuration file %s: %s\n", filename, strerror(errno));
return 1;
} else {
fprintf(stderr, "Created configuration file %s.\n", filename);
}
}
char *tmpfile = NULL;
FILE *tf = NULL;
if(action >= -1) {
xasprintf(&tmpfile, "%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;
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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) {
// 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;
}
// 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;
}
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bool check_id(const char *name) {
if(!name || !*name)
return false;
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for(int i = 0; i < strlen(name); i++) {
if(!isalnum(name[i]) && name[i] != '_')
return false;
}
return true;
}
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static int cmd_init(int argc, char *argv[]) {
if(!access(tinc_conf, F_OK)) {
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fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
return 1;
}
if(argc < 2) {
if(tty) {
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char buf[1024];
fprintf(stdout, "Enter the Name you want your tinc node to have: ");
fflush(stdout);
if(!fgets(buf, sizeof buf, stdin)) {
fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
return 1;
}
int len = rstrip(buf);
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if(!len) {
fprintf(stderr, "No name given!\n");
return 1;
}
name = strdup(buf);
} else {
fprintf(stderr, "No Name given!\n");
return 1;
}
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} else {
name = strdup(argv[1]);
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if(!*name) {
fprintf(stderr, "No Name given!\n");
return 1;
}
}
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if(!check_id(name)) {
fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
return 1;
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}
if(mkdir(confdir, 0755) && errno != EEXIST) {
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fprintf(stderr, "Could not create directory %s: %s\n", CONFDIR, strerror(errno));
return 1;
}
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if(mkdir(confbase, 0755) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
return 1;
}
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if(mkdir(hosts_dir, 0755) && 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;
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#ifndef HAVE_MINGW
char *filename;
xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
if(access(filename, F_OK)) {
FILE *f = fopen(filename, "w");
if(!f) {
fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
return 1;
}
fchmod(fileno(f), 0755);
fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
fclose(f);
}
#endif
return 0;
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}
static int cmd_generate_keys(int argc, char *argv[]) {
return !(rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true) && ecdsa_keygen(true));
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}
static int cmd_generate_rsa_keys(int argc, char *argv[]) {
return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
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}
static int cmd_generate_ecdsa_keys(int argc, char *argv[]) {
return !ecdsa_keygen(true);
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}
static int cmd_help(int argc, char *argv[]) {
usage(false);
return 0;
}
static int cmd_version(int argc, char *argv[]) {
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[]) {
char *name = get_my_name();
if(!name)
return 1;
return export(name, stdout);
}
static int cmd_export_all(int argc, char *argv[]) {
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);
return result;
}
static int cmd_import(int argc, char *argv[]) {
FILE *in = stdin;
FILE *out = NULL;
char buf[4096];
char name[4096];
char *filename;
int count = 0;
bool firstline = true;
while(fgets(buf, sizeof buf, in)) {
if(sscanf(buf, "Name = %s", name) == 1) {
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++;
firstline = false;
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;
}
}
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static const struct {
const char *command;
int (*function)(int argc, char *argv[]);
} 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},
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{"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},
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{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(!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[] = {"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) {
const char *sub[] = {"get", "set", "add", "del"};
static int i;
if(!state) {
i = 0;
if(!strchr(rl_line_buffer + 7, ' '))
i = -4;
else {
bool found = false;
for(int i = 0; i < 4; i++) {
if(!strncasecmp(rl_line_buffer + 7, sub[i], strlen(sub[i])) && rl_line_buffer[7 + strlen(sub[i])] == ' ') {
found = true;
break;
}
}
if(!found)
return NULL;
}
} else {
i++;
}
while(i < 0 || variables[i].name) {
if(i < 0 && !strncasecmp(sub[i + 4], text, strlen(text)))
return xstrdup(sub[i + 4]);
if(i >= 0) {
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", 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, "config ", 7))
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[]) {
char *prompt;
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;
}
}
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free(nargv);
if(tty)
printf("\n");
return result;
}
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int main(int argc, char *argv[]) {
program_name = argv[0];
orig_argv = argv;
orig_argc = argc;
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if(!parse_options(argc, argv))
return 1;
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make_names();
if(show_version) {
version();
return 0;
}
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if(show_help) {
usage(false);
return 0;
}
tty = isatty(0) && isatty(1);
if(optind >= argc)
return cmd_shell(argc, argv);
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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);
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return 1;
}