compat.c 10.2 KB
Newer Older
1 2 3
/*
 * OpenConnect (SSL + DTLS) VPN client
 *
David Woodhouse's avatar
David Woodhouse committed
4
 * Copyright © 2008-2015 Intel Corporation.
5 6 7 8 9 10 11 12 13 14 15 16 17
 *
 * Authors: 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.
 */

18 19
#include <config.h>

20 21
#include <string.h>
#include <stdarg.h>
22
#include <stdlib.h>
23 24 25
#include <errno.h>
#include <ctype.h>

26 27
#include "openconnect-internal.h"

28 29 30
#ifdef HAVE_SUNOS_BROKEN_TIME
/*
 * On SunOS, time() goes backwards. Thankfully, gethrtime() doesn't.
31 32
 * https://www.illumos.org/issues/1871 and, for Solaris 11, Oracle
 * bug ID #15760793 (previously Sun CR ID 7121035).
33
 */
34 35 36 37 38 39 40 41 42 43 44 45
#include <sys/time.h>

time_t openconnect__time(time_t *t)
{
	time_t s = gethrtime() / 1000000000LL;
	if (t)
		*t = s;

	return s;
}
#endif

46 47
#ifndef HAVE_VASPRINTF
int openconnect__vasprintf(char **strp, const char *fmt, va_list ap)
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
{
	va_list ap2;
	char *res = NULL;
	int len = 160, len2;
	int ret = 0;
	int errno_save = -ENOMEM;

	res = malloc(160);
	if (!res)
		goto err;

	/* Use a copy of 'ap', preserving it in case we need to retry into
	   a larger buffer. 160 characters should be sufficient for most
	   strings in openconnect. */
#ifdef HAVE_VA_COPY
	va_copy(ap2, ap);
64
#elif defined(HAVE___VA_COPY)
65 66 67
	__va_copy(ap2, ap);
#else
#error No va_copy()!
68
	/* You could try this. */
69
	ap2 = ap;
70
	/* Or this */
71 72 73 74 75 76 77 78 79 80 81 82
	*ap2 = *ap;
#endif
	len = vsnprintf(res, 160, fmt, ap2);
	va_end(ap2);

	if (len < 0) {
	printf_err:
		errno_save = errno;
		free(res);
		res = NULL;
		goto err;
	}
83
	if (len >= 0 && len < 160)
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
		goto out;

	free(res);
	res = malloc(len+1);
	if (!res)
		goto err;

	len2 = vsnprintf(res, len+1, fmt, ap);
	if (len2 < 0 || len2 > len)
		goto printf_err;

	ret = 0;
	goto out;

 err:
	errno = errno_save;
	ret = -1;
 out:
	*strp = res;
	return ret;
}
105
#endif
106

107
#ifndef HAVE_ASPRINTF
108 109 110 111 112 113
int openconnect__asprintf(char **strp, const char *fmt, ...)
{
	va_list ap;
	int ret;

	va_start(ap, fmt);
114
	ret = vasprintf(strp, fmt, ap);
115 116 117 118
	va_end(ap);
	return ret;
}
#endif
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138

#ifndef HAVE_GETLINE
ssize_t openconnect__getline(char **lineptr, size_t *n, FILE *stream)
{
	int len = 0;

	if (!*lineptr) {
		*n = 2;
		*lineptr = malloc(*n);
		if (!*lineptr)
			return -1;
	}

	while (fgets((*lineptr) + len, (*n) - len, stream)) {

		len += strlen((*lineptr) + len);
		if ((*lineptr)[len-1] == '\n')
			break;

		*n *= 2;
139
		realloc_inplace(*lineptr, *n);
140 141 142 143 144 145 146 147
		if (!*lineptr)
			return -1;
	}
	if (len)
		return len;
	return -1;
}
#endif
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168

#ifndef HAVE_STRCASESTR

char *openconnect__strcasestr(const char *haystack, const char *needle)
{
	int hlen = strlen(haystack);
	int nlen = strlen(needle);
	int i, j;

	for (i = 0; i < hlen - nlen + 1; i++) {
		for (j = 0; j < nlen; j++) {
			if (tolower(haystack[i + j]) !=
			    tolower(needle[j]))
				break;
		}
		if (j == nlen)
			return (char *)haystack + i;
	}
	return NULL;
}
#endif
169

170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
#ifndef HAVE_STRNDUP
char *openconnect__strndup(const char *s, size_t n)
{
	char *r;

	if (n > strlen(s))
		n = strlen(s);

	r = malloc(n + 1);
	if (r) {
		memcpy(r, s, n);
		r[n] = 0;
	}
	return r;
}
#endif

187 188 189
#ifndef HAVE_INET_ATON
int openconnect__inet_aton(const char *cp, struct in_addr *addr)
{
190
	return inet_pton(AF_INET, cp, addr);
191 192
}
#endif
193 194

#ifdef _WIN32
195 196 197 198 199 200 201 202 203 204 205 206
char *openconnect__win32_strerror(DWORD err)
{
	wchar_t *msgw;
	char *msgutf8;
	int nr_chars;

	if (!FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM |
			    FORMAT_MESSAGE_IGNORE_INSERTS |
			    FORMAT_MESSAGE_ALLOCATE_BUFFER,
			    NULL, err,
			    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
			    (LPWSTR)&msgw, 0, NULL)) {
207
		if (asprintf(&msgutf8, _("(error 0x%lx)"), err) != -1)
208 209 210 211
			return msgutf8;
	fail:
		return strdup(_("(Error while describing error!)"));
	}
212 213 214 215 216
	nr_chars = wcslen(msgw);
	if (nr_chars && msgw[nr_chars - 1] == 10)
		msgw[--nr_chars] = 0;
	if (nr_chars && msgw[nr_chars - 1] == 13)
		msgw[--nr_chars] = 0;
217 218 219 220 221 222 223 224 225 226 227 228

	nr_chars = WideCharToMultiByte(CP_UTF8, 0, msgw, -1, NULL, 0, NULL, NULL);

	msgutf8 = malloc(nr_chars);
	if (!msgutf8)
		goto fail;

	WideCharToMultiByte(CP_UTF8, 0, msgw, -1, msgutf8, nr_chars, NULL, NULL);
	LocalFree(msgw);
	return msgutf8;
}

229
int openconnect__win32_sock_init()
230 231 232 233
{
	WSADATA data;
	if (WSAStartup (MAKEWORD(1, 1), &data) != 0) {
		fprintf(stderr, _("ERROR: Cannot initialize sockets\n"));
234
		return -EIO;
235
	}
236
	return 0;
237 238
}

239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279
int openconnect__win32_inet_pton(int af, const char *src, void *dst)
{
	union {
		struct sockaddr_in s4;
		struct sockaddr_in6 s6;
	} sa;
	int salen = sizeof(sa);

	if (af != AF_INET && af != AF_INET6) {
		errno = EAFNOSUPPORT;
		return -1;
	}

	memset(&sa, 0, sizeof(sa));
	sa.s4.sin_family = af;

	if (WSAStringToAddressA((char *)src, af, NULL, (void *)&sa, &salen))
		return 0;

	/* For Legacy IP we need to filter out a lot of crap that
	 * inet_aton() (and WSAStringToAddress()) will support, but
	 * which inet_pton() should not. Not to mention the fact that
	 * Wine's implementation will even succeed for strings like
	 * "2001::1" (http://bugs.winehq.org/show_bug.cgi?id=36991) */
	if (af == AF_INET) {
		char canon[16];
		unsigned char *a = (unsigned char *)&sa.s4.sin_addr;

		snprintf(canon, sizeof(canon), "%d.%d.%d.%d",
			 a[0], a[1], a[2], a[3]);

		if (strcmp(canon, src))
			return 0;

		memcpy(dst, &sa.s4.sin_addr, sizeof(sa.s4.sin_addr));
		return 1;
	} else {
		memcpy(dst, &sa.s6.sin6_addr, sizeof(sa.s6.sin6_addr));
		return 1;
	}
}
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339

/* https://github.com/ncm/selectable-socketpair

Copyright 2007, 2010 by Nathan C. Myers <ncm@cantrip.org>
Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.
    
    Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

    The name of the author must not be used to endorse or promote products derived 
    from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* Changes:
 * 2013-07-18: Change to BSD 3-clause license
 * 2010-03-31:
 *   set addr to 127.0.0.1 because win32 getsockname does not always set it.
 * 2010-02-25:
 *   set SO_REUSEADDR option to avoid leaking some windows resource.
 *   Windows System Error 10049, "Event ID 4226 TCP/IP has reached 
 *   the security limit imposed on the number of concurrent TCP connect 
 *   attempts."  Bleah.
 * 2007-04-25:
 *   preserve value of WSAGetLastError() on all error returns.
 * 2007-04-22:  (Thanks to Matthew Gregan <kinetik@flim.org>)
 *   s/EINVAL/WSAEINVAL/ fix trivial compile failure
 *   s/socket/WSASocket/ enable creation of sockets suitable as stdin/stdout
 *     of a child process.
 *   add argument make_overlapped
 */

#include <string.h>

# include <winsock2.h>
# include <windows.h>
# include <io.h>

/* dumb_socketpair:
 *   If make_overlapped is nonzero, both sockets created will be usable for
 *   "overlapped" operations via WSASend etc.  If make_overlapped is zero,
 *   socks[0] (only) will be usable with regular ReadFile etc., and thus 
 *   suitable for use as stdin or stdout of a child process.  Note that the
 *   sockets must be closed with closesocket() regardless.
 */

340
OPENCONNECT_CMD_SOCKET dumb_socketpair(OPENCONNECT_CMD_SOCKET socks[2], int make_overlapped)
341 342 343 344 345
{
    union {
       struct sockaddr_in inaddr;
       struct sockaddr addr;
    } a;
346
    OPENCONNECT_CMD_SOCKET listener;
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
    int e;
    socklen_t addrlen = sizeof(a.inaddr);
    DWORD flags = (make_overlapped ? WSA_FLAG_OVERLAPPED : 0);
    int reuse = 1;

    if (socks == 0) {
      WSASetLastError(WSAEINVAL);
      return SOCKET_ERROR;
    }

    listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (listener == INVALID_SOCKET) 
        return SOCKET_ERROR;

    memset(&a, 0, sizeof(a));
    a.inaddr.sin_family = AF_INET;
    a.inaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
    a.inaddr.sin_port = 0; 

366
    socks[0] = socks[1] = -1;
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
    do {
        if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, 
               (char*) &reuse, (socklen_t) sizeof(reuse)) == -1)
            break;
        if  (bind(listener, &a.addr, sizeof(a.inaddr)) == SOCKET_ERROR)
            break;

        memset(&a, 0, sizeof(a));
        if  (getsockname(listener, &a.addr, &addrlen) == SOCKET_ERROR)
            break;
        // win32 getsockname may only set the port number, p=0.0005.
        // ( http://msdn.microsoft.com/library/ms738543.aspx ):
        a.inaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        a.inaddr.sin_family = AF_INET;

        if (listen(listener, 1) == SOCKET_ERROR)
            break;

        socks[0] = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, flags);
        if (socks[0] == INVALID_SOCKET)
            break;
        if (connect(socks[0], &a.addr, sizeof(a.inaddr)) == SOCKET_ERROR)
            break;

        socks[1] = accept(listener, NULL, NULL);
        if (socks[1] == INVALID_SOCKET)
            break;

        closesocket(listener);
        return 0;

    } while (0);

    e = WSAGetLastError();
    closesocket(listener);
    closesocket(socks[0]);
    closesocket(socks[1]);
    WSASetLastError(e);
    return SOCKET_ERROR;
}
407
#endif /* _WIN32 */