/
main.c
2093 lines (1855 loc) · 53.9 KB
/
main.c
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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2008 Nick Andrew <nick@nick-andrew.net>
* Copyright © 2013 John Morrissey <jwm@horde.net>
*
* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*/
#include <config.h>
#ifdef HAVE_GETLINE
/* Various BSD systems require this for getline() to be visible */
#define _WITH_GETLINE
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <getopt.h>
#include <time.h>
#include <locale.h>
#ifdef LIBPROXY_HDR
#include LIBPROXY_HDR
#endif
#include "openconnect-internal.h"
#ifdef _WIN32
#include <shlwapi.h>
#include <wtypes.h>
#include <wincon.h>
#else
#include <sys/utsname.h>
#include <pwd.h>
#include <termios.h>
#endif
#ifdef HAVE_NL_LANGINFO
#include <langinfo.h>
static const char *legacy_charset;
#endif
static int write_new_config(void *_vpninfo,
const char *buf, int buflen);
static void __attribute__ ((format(printf, 3, 4)))
write_progress(void *_vpninfo, int level, const char *fmt, ...);
static int validate_peer_cert(void *_vpninfo, const char *reason);
static int process_auth_form_cb(void *_vpninfo,
struct oc_auth_form *form);
static void init_token(struct openconnect_info *vpninfo,
oc_token_mode_t token_mode, const char *token_str);
/* A sanity check that the openconnect executable is running against a
library of the same version */
#define openconnect_version_str openconnect_binary_version
#include <version.c>
#undef openconnect_version_str
static int verbose = PRG_INFO;
static int timestamp;
int background;
static int do_passphrase_from_fsid;
static int non_inter;
static int cookieonly;
static int allow_stdin_read;
static char *token_filename;
static char *server_cert = NULL;
static char *username;
static char *password;
static char *authgroup;
static int authgroup_set;
static int last_form_empty;
static int sig_cmd_fd;
#ifdef __ANDROID__
#include <android/log.h>
static void __attribute__ ((format(printf, 3, 4)))
syslog_progress(void *_vpninfo, int level, const char *fmt, ...)
{
static int l[4] = {
ANDROID_LOG_ERROR, /* PRG_ERR */
ANDROID_LOG_INFO, /* PRG_INFO */
ANDROID_LOG_DEBUG, /* PRG_DEBUG */
ANDROID_LOG_DEBUG /* PRG_TRACE */
};
va_list args, args2;
if (verbose >= level) {
va_start(args, fmt);
va_copy(args2, args);
__android_log_vprint(l[level], "openconnect", fmt, args);
/* Android wants it to stderr too, so the GUI can scrape
it and display it as well as going to syslog */
vfprintf(stderr, fmt, args2);
va_end(args);
va_end(args2);
}
}
#define openlog(...) /* */
#elif defined(_WIN32) || defined(__native_client__)
/*
* FIXME: Perhaps we could implement syslog_progress() using these APIs:
* http://msdn.microsoft.com/en-us/library/windows/desktop/aa364148%28v=vs.85%29.aspx
*/
#else /* !__ANDROID__ && !_WIN32 && !__native_client__ */
#include <syslog.h>
static void __attribute__ ((format(printf, 3, 4)))
syslog_progress(void *_vpninfo, int level, const char *fmt, ...)
{
int priority = level ? LOG_INFO : LOG_NOTICE;
va_list args;
if (verbose >= level) {
va_start(args, fmt);
vsyslog(priority, fmt, args);
va_end(args);
}
}
#endif
enum {
OPT_AUTHENTICATE = 0x100,
OPT_AUTHGROUP,
OPT_BASEMTU,
OPT_CAFILE,
OPT_COMPRESSION,
OPT_CONFIGFILE,
OPT_COOKIEONLY,
OPT_COOKIE_ON_STDIN,
OPT_CSD_USER,
OPT_CSD_WRAPPER,
OPT_DISABLE_IPV6,
OPT_DTLS_CIPHERS,
OPT_DUMP_HTTP,
OPT_FORCE_DPD,
OPT_GNUTLS_DEBUG,
OPT_JUNIPER,
OPT_KEY_PASSWORD_FROM_FSID,
OPT_LIBPROXY,
OPT_NO_CERT_CHECK,
OPT_NO_DTLS,
OPT_NO_HTTP_KEEPALIVE,
OPT_NO_SYSTEM_TRUST,
OPT_NO_PASSWD,
OPT_NO_PROXY,
OPT_NO_XMLPOST,
OPT_PIDFILE,
OPT_PASSWORD_ON_STDIN,
OPT_PRINTCOOKIE,
OPT_RECONNECT_TIMEOUT,
OPT_SERVERCERT,
OPT_RESOLVE,
OPT_USERAGENT,
OPT_NON_INTER,
OPT_DTLS_LOCAL_PORT,
OPT_TOKEN_MODE,
OPT_TOKEN_SECRET,
OPT_OS,
OPT_TIMESTAMP,
OPT_PFS,
OPT_PROXY_AUTH,
OPT_HTTP_AUTH,
OPT_LOCAL_HOSTNAME,
OPT_PROTOCOL,
OPT_PASSTOS,
};
#ifdef __sun__
/*
* The 'name' field in Solaris 'struct option' lacks the 'const', and causes
* lots of warnings unless we cast it... https://www.illumos.org/issues/1881
*/
#define OPTION(name, arg, abbrev) {(char *)name, arg, NULL, abbrev}
#else
#define OPTION(name, arg, abbrev) {name, arg, NULL, abbrev}
#endif
static const struct option long_options[] = {
#ifndef _WIN32
OPTION("background", 0, 'b'),
OPTION("pid-file", 1, OPT_PIDFILE),
OPTION("setuid", 1, 'U'),
OPTION("script-tun", 0, 'S'),
OPTION("syslog", 0, 'l'),
OPTION("csd-user", 1, OPT_CSD_USER),
OPTION("csd-wrapper", 1, OPT_CSD_WRAPPER),
#endif
OPTION("pfs", 0, OPT_PFS),
OPTION("certificate", 1, 'c'),
OPTION("sslkey", 1, 'k'),
OPTION("cookie", 1, 'C'),
OPTION("compression", 1, OPT_COMPRESSION),
OPTION("deflate", 0, 'd'),
OPTION("juniper", 0, OPT_JUNIPER),
OPTION("no-deflate", 0, 'D'),
OPTION("cert-expire-warning", 1, 'e'),
OPTION("usergroup", 1, 'g'),
OPTION("help", 0, 'h'),
OPTION("http-auth", 1, OPT_HTTP_AUTH),
OPTION("interface", 1, 'i'),
OPTION("mtu", 1, 'm'),
OPTION("base-mtu", 1, OPT_BASEMTU),
OPTION("script", 1, 's'),
OPTION("timestamp", 0, OPT_TIMESTAMP),
OPTION("passtos", 0, OPT_PASSTOS),
OPTION("key-password", 1, 'p'),
OPTION("proxy", 1, 'P'),
OPTION("proxy-auth", 1, OPT_PROXY_AUTH),
OPTION("user", 1, 'u'),
OPTION("verbose", 0, 'v'),
OPTION("version", 0, 'V'),
OPTION("cafile", 1, OPT_CAFILE),
OPTION("config", 1, OPT_CONFIGFILE),
OPTION("no-dtls", 0, OPT_NO_DTLS),
OPTION("authenticate", 0, OPT_AUTHENTICATE),
OPTION("cookieonly", 0, OPT_COOKIEONLY),
OPTION("printcookie", 0, OPT_PRINTCOOKIE),
OPTION("quiet", 0, 'q'),
OPTION("queue-len", 1, 'Q'),
OPTION("xmlconfig", 1, 'x'),
OPTION("cookie-on-stdin", 0, OPT_COOKIE_ON_STDIN),
OPTION("passwd-on-stdin", 0, OPT_PASSWORD_ON_STDIN),
OPTION("no-passwd", 0, OPT_NO_PASSWD),
OPTION("reconnect-timeout", 1, OPT_RECONNECT_TIMEOUT),
OPTION("dtls-ciphers", 1, OPT_DTLS_CIPHERS),
OPTION("authgroup", 1, OPT_AUTHGROUP),
OPTION("servercert", 1, OPT_SERVERCERT),
OPTION("resolve", 1, OPT_RESOLVE),
OPTION("key-password-from-fsid", 0, OPT_KEY_PASSWORD_FROM_FSID),
OPTION("useragent", 1, OPT_USERAGENT),
OPTION("local-hostname", 1, OPT_LOCAL_HOSTNAME),
OPTION("disable-ipv6", 0, OPT_DISABLE_IPV6),
OPTION("no-proxy", 0, OPT_NO_PROXY),
OPTION("libproxy", 0, OPT_LIBPROXY),
OPTION("no-http-keepalive", 0, OPT_NO_HTTP_KEEPALIVE),
OPTION("no-cert-check", 0, OPT_NO_CERT_CHECK),
OPTION("force-dpd", 1, OPT_FORCE_DPD),
OPTION("non-inter", 0, OPT_NON_INTER),
OPTION("dtls-local-port", 1, OPT_DTLS_LOCAL_PORT),
OPTION("token-mode", 1, OPT_TOKEN_MODE),
OPTION("token-secret", 1, OPT_TOKEN_SECRET),
OPTION("os", 1, OPT_OS),
OPTION("no-xmlpost", 0, OPT_NO_XMLPOST),
OPTION("dump-http-traffic", 0, OPT_DUMP_HTTP),
OPTION("no-system-trust", 0, OPT_NO_SYSTEM_TRUST),
OPTION("protocol", 1, OPT_PROTOCOL),
#ifdef OPENCONNECT_GNUTLS
OPTION("gnutls-debug", 1, OPT_GNUTLS_DEBUG),
#endif
OPTION(NULL, 0, 0)
};
#ifdef OPENCONNECT_GNUTLS
static void oc_gnutls_log_func(int level, const char *str)
{
fputs(str, stderr);
}
#endif
#ifdef _WIN32
static int __attribute__ ((format(printf, 2, 0)))
vfprintf_utf8(FILE *f, const char *fmt, va_list args)
{
HANDLE h = GetStdHandle(f == stdout ? STD_OUTPUT_HANDLE : STD_ERROR_HANDLE);
wchar_t wbuf[1024];
char buf[1024];
int chars, wchars;
buf[sizeof(buf) - 1] = 0;
chars = _vsnprintf(buf, sizeof(buf) - 1, fmt, args);
wchars = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)/2);
WriteConsoleW(h, wbuf, wchars, NULL, NULL);
return chars;
}
static int __attribute__ ((format(printf, 2, 3)))
fprintf_utf8(FILE *f, const char *fmt, ...)
{
va_list args;
int ret;
va_start(args, fmt);
ret = vfprintf_utf8(f, fmt, args);
va_end(args);
return ret;
}
static wchar_t **argv_w;
/* This isn't so much "convert" the arg to UTF-8, as go grubbing
* around in the real UTF-16 command line and find the corresponding
* argument *there*, and convert *that* to UTF-8. Ick. But the
* alternative is to implement wgetopt(), and that's even more horrid. */
static char *convert_arg_to_utf8(char **argv, char *arg)
{
char *utf8;
int chars;
int offset;
if (!argv_w) {
int argc_w;
argv_w = CommandLineToArgvW(GetCommandLineW(), &argc_w);
if (!argv_w) {
char *errstr = openconnect__win32_strerror(GetLastError());
fprintf(stderr, _("CommandLineToArgvW() failed: %s\n"),
errstr);
free(errstr);
exit(1);
}
}
offset = arg - argv[optind - 1];
/* Sanity check */
if (offset < 0 || offset >= strlen(argv[optind - 1]) ||
(offset && (argv[optind - 1][offset-1] != '=' ||
argv_w[optind - 1][offset - 1] != '='))) {
fprintf(stderr, _("Fatal error in command line handling\n"));
exit(1);
}
chars = WideCharToMultiByte(CP_UTF8, 0, argv_w[optind-1] + offset, -1,
NULL, 0, NULL, NULL);
utf8 = malloc(chars);
if (!utf8)
return arg;
WideCharToMultiByte(CP_UTF8, 0, argv_w[optind-1] + offset, -1, utf8,
chars, NULL, NULL);
return utf8;
}
#undef fprintf
#undef vfprintf
#define fprintf fprintf_utf8
#define vfprintf vfprintf_utf8
#define is_arg_utf8(str) (0)
static void read_stdin(char **string, int hidden, int allow_fail)
{
CONSOLE_READCONSOLE_CONTROL rcc = { sizeof(rcc), 0, 13, 0 };
HANDLE stdinh = GetStdHandle(STD_INPUT_HANDLE);
DWORD cmode, nr_read;
wchar_t wbuf[1024];
char *buf;
if (hidden) {
GetConsoleMode(stdinh, &cmode);
SetConsoleMode(stdinh, cmode & (~ENABLE_ECHO_INPUT));
}
if (!ReadConsoleW(stdinh, wbuf, sizeof(wbuf)/2, &nr_read, &rcc)) {
char *errstr = openconnect__win32_strerror(GetLastError());
fprintf(stderr, _("ReadConsole() failed: %s\n"), errstr);
free(errstr);
*string = NULL;
goto out;
}
if (nr_read >= 2 && wbuf[nr_read - 1] == 10 && wbuf[nr_read - 2] == 13) {
wbuf[nr_read - 2] = 0;
nr_read -= 2;
}
nr_read = WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, NULL, 0, NULL, NULL);
if (!nr_read) {
char *errstr = openconnect__win32_strerror(GetLastError());
fprintf(stderr, _("Error converting console input: %s\n"),
errstr);
free(errstr);
goto out;
}
buf = malloc(nr_read);
if (!buf) {
fprintf(stderr, _("Allocation failure for string from stdin\n"));
exit(1);
}
if (!WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, buf, nr_read, NULL, NULL)) {
char *errstr = openconnect__win32_strerror(GetLastError());
fprintf(stderr, _("Error converting console input: %s\n"),
errstr);
free(errstr);
free(buf);
goto out;
}
*string = buf;
out:
if (hidden) {
SetConsoleMode(stdinh, cmode);
fprintf(stderr, "\n");
}
}
#elif defined(HAVE_ICONV)
#include <iconv.h>
static int is_ascii(char *str)
{
while (str && *str) {
if ((unsigned char)*str > 0x7f)
return 0;
str++;
}
return 1;
}
static int __attribute__ ((format(printf, 2, 0)))
vfprintf_utf8(FILE *f, const char *fmt, va_list args)
{
char *utf8_str;
iconv_t ic;
int ret;
char outbuf[80];
ICONV_CONST char *ic_in;
char *ic_out;
size_t insize, outsize;
if (!legacy_charset)
return vfprintf(f, fmt, args);
ret = vasprintf(&utf8_str, fmt, args);
if (ret < 0)
return -1;
if (is_ascii(utf8_str))
return fwrite(utf8_str, 1, strlen(utf8_str), f);
ic = iconv_open(legacy_charset, "UTF-8");
if (ic == (iconv_t) -1) {
/* Better than nothing... */
ret = fprintf(f, "%s", utf8_str);
free(utf8_str);
return ret;
}
ic_in = utf8_str;
insize = strlen(utf8_str);
ret = 0;
while (insize) {
ic_out = outbuf;
outsize = sizeof(outbuf) - 1;
if (iconv(ic, &ic_in, &insize, &ic_out, &outsize) == (size_t)-1) {
if (errno == EILSEQ) {
do {
ic_in++;
insize--;
} while (insize && (ic_in[0] & 0xc0) == 0x80);
ic_out[0] = '?';
outsize--;
} else if (errno != E2BIG)
break;
}
ret += fwrite(outbuf, 1, sizeof(outbuf) - 1 - outsize, f);
}
iconv_close(ic);
return ret;
}
static int __attribute__ ((format(printf, 2, 3)))
fprintf_utf8(FILE *f, const char *fmt, ...)
{
va_list args;
int ret;
va_start(args, fmt);
ret = vfprintf_utf8(f, fmt, args);
va_end(args);
return ret;
}
static char *convert_to_utf8(char *legacy, int free_it)
{
char *utf8_str;
iconv_t ic;
ICONV_CONST char *ic_in;
char *ic_out;
size_t insize, outsize;
if (!legacy_charset || is_ascii(legacy))
return legacy;
ic = iconv_open("UTF-8", legacy_charset);
if (ic == (iconv_t) -1)
return legacy;
insize = strlen(legacy) + 1;
ic_in = legacy;
outsize = insize;
ic_out = utf8_str = malloc(outsize);
if (!utf8_str) {
enomem:
iconv_close(ic);
return legacy;
}
while (insize) {
if (iconv(ic, &ic_in, &insize, &ic_out, &outsize) == (size_t)-1) {
if (errno == E2BIG) {
int outlen = ic_out - utf8_str;
realloc_inplace(utf8_str, outlen + 10);
if (!utf8_str)
goto enomem;
ic_out = utf8_str + outlen;
outsize = 10;
} else {
/* Should never happen */
perror("iconv");
free(utf8_str);
goto enomem;
}
}
}
iconv_close(ic);
if (free_it)
free(legacy);
return utf8_str;
}
#define fprintf fprintf_utf8
#define vfprintf vfprintf_utf8
#define convert_arg_to_utf8(av, l) convert_to_utf8((l), 0)
#define is_arg_utf8(a) (!legacy_charset || is_ascii(a))
#else
#define convert_to_utf8(l,f) (l)
#define convert_arg_to_utf8(av, l) (l)
#define is_arg_utf8(a) (1)
#endif
static void helpmessage(void)
{
printf(_("For assistance with OpenConnect, please see the web page at\n"
" http://www.infradead.org/openconnect/mail.html\n"));
}
static void print_build_opts(void)
{
const char *comma = ", ", *sep = comma + 1;
#if defined(OPENCONNECT_OPENSSL)
printf(_("Using OpenSSL. Features present:"));
#elif defined(OPENCONNECT_GNUTLS)
printf(_("Using GnuTLS. Features present:"));
#endif
if (openconnect_has_tss_blob_support()) {
printf("%sTPM", sep);
sep = comma;
}
#if defined(OPENCONNECT_OPENSSL) && defined(HAVE_ENGINE)
else {
printf("%sTPM (%s)", sep, _("OpenSSL ENGINE not present"));
sep = comma;
}
#endif
if (openconnect_has_pkcs11_support()) {
printf("%sPKCS#11", sep);
sep = comma;
}
if (openconnect_has_stoken_support()) {
printf("%sRSA software token", sep);
sep = comma;
}
switch(openconnect_has_oath_support()) {
case 2:
printf("%sHOTP software token", sep);
sep = comma;
case 1:
printf("%sTOTP software token", sep);
sep = comma;
}
if (openconnect_has_yubioath_support()) {
printf("%sYubikey OATH", sep);
sep = comma;
}
if (openconnect_has_system_key_support()) {
printf("%sSystem keys", sep);
sep = comma;
}
#ifdef HAVE_DTLS
printf("%sDTLS\n", sep);
#else
printf(_("\nWARNING: No DTLS support in this binary. Performance will be impaired.\n"));
#endif
}
#ifndef _WIN32
static const char default_vpncscript[] = DEFAULT_VPNCSCRIPT;
static void read_stdin(char **string, int hidden, int allow_fail)
{
char *c, *buf = malloc(1025);
int fd = fileno(stdin);
struct termios t;
if (!buf) {
fprintf(stderr, _("Allocation failure for string from stdin\n"));
exit(1);
}
if (hidden) {
tcgetattr(fd, &t);
t.c_lflag &= ~ECHO;
tcsetattr(fd, TCSANOW, &t);
}
buf = fgets(buf, 1025, stdin);
if (hidden) {
t.c_lflag |= ECHO;
tcsetattr(fd, TCSANOW, &t);
fprintf(stderr, "\n");
}
if (!buf) {
if (allow_fail) {
*string = NULL;
free(buf);
return;
} else {
perror(_("fgets (stdin)"));
exit(1);
}
}
c = strchr(buf, '\n');
if (c)
*c = 0;
*string = convert_to_utf8(buf, 1);
}
static void handle_signal(int sig)
{
char cmd;
switch (sig) {
case SIGINT:
cmd = OC_CMD_CANCEL;
break;
case SIGHUP:
cmd = OC_CMD_DETACH;
break;
case SIGUSR2:
default:
cmd = OC_CMD_PAUSE;
break;
}
if (write(sig_cmd_fd, &cmd, 1) < 0) {
/* suppress warn_unused_result */
}
}
#else /* _WIN32 */
static const char *default_vpncscript;
static void set_default_vpncscript(void)
{
if (PathIsRelative(DEFAULT_VPNCSCRIPT)) {
char *c = strrchr(_pgmptr, '\\');
if (!c) {
fprintf(stderr, _("Cannot process this executable path \"%s\""),
_pgmptr);
exit(1);
}
if (asprintf((char **)&default_vpncscript, "%.*s%s",
(c - _pgmptr + 1), _pgmptr, DEFAULT_VPNCSCRIPT) < 0) {
fprintf(stderr, _("Allocation for vpnc-script path failed\n"));
exit(1);
}
} else {
default_vpncscript = "cscript " DEFAULT_VPNCSCRIPT;
}
}
#endif
static struct oc_vpn_option *gai_overrides;
static int gai_override_cb(void *cbdata, const char *node,
const char *service, const struct addrinfo *hints,
struct addrinfo **res)
{
struct openconnect_info *vpninfo = cbdata;
struct oc_vpn_option *p = gai_overrides;
while (p) {
if (!strcmp(node, p->option)) {
vpn_progress(vpninfo, PRG_TRACE, _("Override hostname '%s' to '%s'\n"),
node, p->value);
node = p->value;
break;
}
p = p->next;
}
return getaddrinfo(node, service, hints, res);
}
static void usage(void)
{
printf(_("Usage: openconnect [options] <server>\n"));
printf(_("Open client for Cisco AnyConnect VPN, version %s\n\n"), openconnect_version_str);
print_build_opts();
printf(" --config=CONFIGFILE %s\n", _("Read options from config file"));
#ifndef _WIN32
printf(" -b, --background %s\n", _("Continue in background after startup"));
printf(" --pid-file=PIDFILE %s\n", _("Write the daemon's PID to this file"));
#endif
printf(" -c, --certificate=CERT %s\n", _("Use SSL client certificate CERT"));
printf(" -e, --cert-expire-warning=DAYS %s\n", _("Warn when certificate lifetime < DAYS"));
printf(" -k, --sslkey=KEY %s\n", _("Use SSL private key file KEY"));
printf(" -C, --cookie=COOKIE %s\n", _("Use WebVPN cookie COOKIE"));
printf(" --cookie-on-stdin %s\n", _("Read cookie from standard input"));
printf(" -d, --deflate %s\n", _("Enable compression (default)"));
printf(" -D, --no-deflate %s\n", _("Disable compression"));
printf(" --force-dpd=INTERVAL %s\n", _("Set minimum Dead Peer Detection interval"));
printf(" -g, --usergroup=GROUP %s\n", _("Set login usergroup"));
printf(" -h, --help %s\n", _("Display help text"));
printf(" -i, --interface=IFNAME %s\n", _("Use IFNAME for tunnel interface"));
#ifndef _WIN32
printf(" -l, --syslog %s\n", _("Use syslog for progress messages"));
#endif
printf(" --timestamp %s\n", _("Prepend timestamp to progress messages"));
printf(" --passtos %s\n", _("copy TOS / TCLASS when using DTLS"));
#ifndef _WIN32
printf(" -U, --setuid=USER %s\n", _("Drop privileges after connecting"));
printf(" --csd-user=USER %s\n", _("Drop privileges during CSD execution"));
printf(" --csd-wrapper=SCRIPT %s\n", _("Run SCRIPT instead of CSD binary"));
#endif
printf(" -m, --mtu=MTU %s\n", _("Request MTU from server (legacy servers only)"));
printf(" --base-mtu=MTU %s\n", _("Indicate path MTU to/from server"));
printf(" -p, --key-password=PASS %s\n", _("Set key passphrase or TPM SRK PIN"));
printf(" --key-password-from-fsid %s\n", _("Key passphrase is fsid of file system"));
printf(" -P, --proxy=URL %s\n", _("Set proxy server"));
printf(" --proxy-auth=METHODS %s\n", _("Set proxy authentication methods"));
printf(" --no-proxy %s\n", _("Disable proxy"));
printf(" --libproxy %s\n", _("Use libproxy to automatically configure proxy"));
#ifndef LIBPROXY_HDR
printf(" %s\n", _("(NOTE: libproxy disabled in this build)"));
#endif
printf(" --pfs %s\n", _("Require perfect forward secrecy"));
printf(" -q, --quiet %s\n", _("Less output"));
printf(" -Q, --queue-len=LEN %s\n", _("Set packet queue limit to LEN pkts"));
printf(" -s, --script=SCRIPT %s\n", _("Shell command line for using a vpnc-compatible config script"));
printf(" %s: \"%s\"\n", _("default"), default_vpncscript);
#ifndef _WIN32
printf(" -S, --script-tun %s\n", _("Pass traffic to 'script' program, not tun"));
#endif
printf(" -u, --user=NAME %s\n", _("Set login username"));
printf(" -V, --version %s\n", _("Report version number"));
printf(" -v, --verbose %s\n", _("More output"));
printf(" --dump-http-traffic %s\n", _("Dump HTTP authentication traffic (implies --verbose"));
printf(" -x, --xmlconfig=CONFIG %s\n", _("XML config file"));
printf(" --authgroup=GROUP %s\n", _("Choose authentication login selection"));
printf(" --authenticate %s\n", _("Authenticate only and print login info"));
printf(" --cookieonly %s\n", _("Fetch webvpn cookie only; don't connect"));
printf(" --printcookie %s\n", _("Print webvpn cookie before connecting"));
printf(" --cafile=FILE %s\n", _("Cert file for server verification"));
printf(" --disable-ipv6 %s\n", _("Do not ask for IPv6 connectivity"));
printf(" --dtls-ciphers=LIST %s\n", _("OpenSSL ciphers to support for DTLS"));
printf(" --no-dtls %s\n", _("Disable DTLS"));
printf(" --no-http-keepalive %s\n", _("Disable HTTP connection re-use"));
printf(" --no-passwd %s\n", _("Disable password/SecurID authentication"));
printf(" --no-cert-check %s\n", _("Do not require server SSL cert to be valid"));
printf(" --no-system-trust %s\n", _("Disable default system certificate authorities"));
printf(" --no-xmlpost %s\n", _("Do not attempt XML POST authentication"));
printf(" --non-inter %s\n", _("Do not expect user input; exit if it is required"));
printf(" --passwd-on-stdin %s\n", _("Read password from standard input"));
printf(" --token-mode=MODE %s\n", _("Software token type: rsa, totp or hotp"));
printf(" --token-secret=STRING %s\n", _("Software token secret"));
#ifndef HAVE_LIBSTOKEN
printf(" %s\n", _("(NOTE: libstoken (RSA SecurID) disabled in this build)"));
#endif
#ifndef HAVE_LIBPCSCLITE
printf(" %s\n", _("(NOTE: Yubikey OATH disabled in this build)"));
#endif
printf(" --reconnect-timeout %s\n", _("Connection retry timeout in seconds"));
printf(" --servercert=FINGERPRINT %s\n", _("Server's certificate SHA1 fingerprint"));
printf(" --useragent=STRING %s\n", _("HTTP header User-Agent: field"));
printf(" --local-hostname=STRING %s\n", _("Local hostname to advertise to server"));
printf(" --resolve=HOST:IP %s\n", _("Use IP when connecting to HOST"));
printf(" --os=STRING %s\n", _("OS type (linux,linux-64,win,...) to report"));
printf(" --dtls-local-port=PORT %s\n", _("Set local port for DTLS datagrams"));
printf("\n");
helpmessage();
exit(1);
}
static FILE *config_file = NULL;
static int config_line_num = 0;
static char *xstrdup(const char *arg)
{
char *ret;
if (!arg)
return NULL;
ret = strdup(arg);
if (!ret) {
fprintf(stderr, _("Failed to allocate string\n"));
exit(1);
}
return ret;
}
/* There are three ways to handle config_arg:
*
* 1. We only care about it transiently and it can be lost entirely
* (e.g. vpninfo->reconnect_timeout = atoi(config_arg);
* 2. We need to keep it, but it's a static string and will never be freed
* so when it's part of argv[] we can use it in place (unless it needs
* converting to UTF-8), but when it comes from a file we have to strdup()
* because otherwise it'll be overwritten.
* For this we use the keep_config_arg() macro below.
* 3. It may be freed during normal operation, so we have to use strdup()
* or convert_arg_to_utf8() even when it's an option from argv[].
* (e.g. vpninfo->cert_password).
* For this we use the dup_config_arg() macro below.
*/
#define keep_config_arg() \
(config_file ? xstrdup(config_arg) : convert_arg_to_utf8(argv, config_arg))
#define dup_config_arg() \
((config_file || is_arg_utf8(config_arg)) ? xstrdup(config_arg) : \
convert_arg_to_utf8(argv, config_arg))
static int next_option(int argc, char **argv, char **config_arg)
{
/* These get re-used */
static char *line_buf = NULL;
static size_t line_size = 0;
ssize_t llen;
int opt, optlen = 0;
const struct option *this;
char *line;
int ate_equals = 0;
next:
if (!config_file) {
opt = getopt_long(argc, argv,
#ifdef _WIN32
"C:c:Dde:g:hi:k:m:P:p:Q:qs:u:Vvx:",
#else
"bC:c:Dde:g:hi:k:lm:P:p:Q:qSs:U:u:Vvx:",
#endif
long_options, NULL);
*config_arg = optarg;
return opt;
}
llen = getline(&line_buf, &line_size, config_file);
if (llen < 0) {
if (feof(config_file)) {
fclose(config_file);
config_file = NULL;
goto next;
}
fprintf(stderr, _("Failed to get line from config file: %s\n"),
strerror(errno));
exit(1);
}
line = line_buf;
/* Strip the trailing newline (coping with DOS newlines) */
if (llen && line[llen-1] == '\n')
line[--llen] = 0;
if (llen && line[llen-1] == '\r')
line[--llen] = 0;
/* Skip and leading whitespace */
while (line[0] == ' ' || line[0] == '\t' || line[0] == '\r')
line++;
/* Ignore comments and empty lines */
if (!line[0] || line[0] == '#') {
config_line_num++;
goto next;
}
/* Try to match on a known option... naïvely. This could be improved. */
for (this = long_options; this->name; this++) {
optlen = strlen(this->name);
/* If the option isn't followed by whitespace or NUL, or
perhaps an equals sign if the option takes an argument,
then it's not a match */
if (!strncmp(this->name, line, optlen) &&
(!line[optlen] || line[optlen] == ' ' || line[optlen] == '\t' ||
line[optlen] == '='))
break;
}
if (!this->name) {
char *l;
for (l = line; *l && *l != ' ' && *l != '\t'; l++)
;
*l = 0;
fprintf(stderr, _("Unrecognised option at line %d: '%s'\n"),
config_line_num, line);
return '?';
}
line += optlen;
while (*line == ' ' || *line == '\t' ||
(*line == '=' && this->has_arg && !ate_equals && ++ate_equals))
line++;
if (!this->has_arg && *line) {
fprintf(stderr, _("Option '%s' does not take an argument at line %d\n"),
this->name, config_line_num);
return '?';
} else if (this->has_arg == 1 && !*line) {
fprintf(stderr, _("Option '%s' requires an argument at line %d\n"),
this->name, config_line_num);
return '?';
} else if (this->has_arg == 2 && !*line) {
line = NULL;
}
config_line_num++;
*config_arg = line;
return this->val;
}
#ifndef _WIN32
static void get_uids(const char *config_arg, uid_t *uid, gid_t *gid)
{
char *strend;
struct passwd *pw;
int e;
*uid = strtol(config_arg, &strend, 0);
if (strend[0]) {
pw = getpwnam(config_arg);
if (!pw) {
e = errno;
fprintf(stderr, _("Invalid user \"%s\": %s\n"),
config_arg, strerror(e));
exit(1);
}
*uid = pw->pw_uid;
*gid = pw->pw_gid;
} else {
pw = getpwuid(*uid);
if (!pw) {
e = errno;
fprintf(stderr, _("Invalid user ID \"%d\": %s\n"),
(int)*uid, strerror(e));
exit(1);
}
*gid = pw->pw_gid;
}
}
#endif
int main(int argc, char **argv)