crypto/bio/b_sock.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <errno.h>
  61 #include "bio_lcl.h"
  62 #if defined(NETWARE_CLIB)
  63 # include <sys/ioctl.h>
  64 NETDB_DEFINE_CONTEXT
  65 #endif
  66 #ifndef OPENSSL_NO_SOCK
  67 # include <openssl/dso.h>
  68 # define SOCKET_PROTOCOL IPPROTO_TCP
  69 # ifdef SO_MAXCONN
  70 #  define MAX_LISTEN  SO_MAXCONN
  71 # elif defined(SOMAXCONN)
  72 #  define MAX_LISTEN  SOMAXCONN
  73 # else
  74 #  define MAX_LISTEN  32
  75 # endif
  76 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
  77 static int wsa_init_done = 0;
  78 # endif
  79
  80 /*
  81  * WSAAPI specifier is required to make indirect calls to run-time
  82  * linked WinSock 2 functions used in this module, to be specific
  83  * [get|free]addrinfo and getnameinfo. This is because WinSock uses
  84  * uses non-C calling convention, __stdcall vs. __cdecl, on x86
  85  * Windows. On non-WinSock platforms WSAAPI needs to be void.
  86  */
  87 # ifndef WSAAPI
  88 #  define WSAAPI
  89 # endif
  90
  91 # if OPENSSL_API_COMPAT < 0x10100000L
  92 int BIO_get_host_ip(const char *str, unsigned char *ip)
  93 {
  94     BIO_ADDRINFO *res = NULL;
  95     int ret = 0;
  96
  97     if (BIO_sock_init() != 1)
  98         return 0;               /* don't generate another error code here */
  99
 100     if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
 101         size_t l;
 102
 103         if (BIO_ADDRINFO_family(res) != AF_INET) {
 104             BIOerr(BIO_F_BIO_GET_HOST_IP,
 105                    BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
 106         } else {
 107             BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l);
 108             /* Because only AF_INET addresses will reach this far,
 109                we can assert that l should be 4 */
 110             OPENSSL_assert(l == 4);
 111
 112             BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
 113             ret = 1;
 114         }
 115         BIO_ADDRINFO_free(res);
 116     } else {
 117         ERR_add_error_data(2, "host=", str);
 118     }
 119
 120     return ret;
 121 }
 122
 123 int BIO_get_port(const char *str, unsigned short *port_ptr)
 124 {
 125     BIO_ADDRINFO *res = NULL;
 126     int ret = 0;
 127
 128     if (str == NULL) {
 129         BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
 130         return (0);
 131     }
 132
 133     if (BIO_sock_init() != 1)
 134         return 0;               /* don't generate another error code here */
 135
 136     if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
 137         if (BIO_ADDRINFO_family(res) != AF_INET) {
 138             BIOerr(BIO_F_BIO_GET_PORT,
 139                    BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
 140         } else {
 141             *port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
 142             ret = 1;
 143         }
 144         BIO_ADDRINFO_free(res);
 145     } else {
 146         ERR_add_error_data(2, "host=", str);
 147     }
 148
 149     return ret;
 150 }
 151 # endif
 152
 153 int BIO_sock_error(int sock)
 154 {
 155     int j = 0, i;
 156     socklen_t size = 0;
 157
 158     /*
 159      * Note: under Windows the third parameter is of type (char *) whereas
 160      * under other systems it is (void *) if you don't have a cast it will
 161      * choke the compiler: if you do have a cast then you can either go for
 162      * (char *) or (void *).
 163      */
 164     i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
 165     if (i < 0)
 166         return (1);
 167     else
 168         return (j);
 169 }
 170
 171 # if OPENSSL_API_COMPAT < 0x10100000L
 172 struct hostent *BIO_gethostbyname(const char *name)
 173 {
 174     /*
 175      * Caching gethostbyname() results forever is wrong, so we have to let
 176      * the true gethostbyname() worry about this
 177      */
 178 #  if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
 179     return gethostbyname((char *)name);
 180 #  else
 181     return gethostbyname(name);
 182 #  endif
 183 }
 184 # endif
 185
 186 int BIO_sock_init(void)
 187 {
 188 # ifdef OPENSSL_SYS_WINDOWS
 189     static struct WSAData wsa_state;
 190
 191     if (!wsa_init_done) {
 192         int err;
 193
 194         wsa_init_done = 1;
 195         memset(&wsa_state, 0, sizeof(wsa_state));
 196         /*
 197          * Not making wsa_state available to the rest of the code is formally
 198          * wrong. But the structures we use are [believed to be] invariable
 199          * among Winsock DLLs, while API availability is [expected to be]
 200          * probed at run-time with DSO_global_lookup.
 201          */
 202         if (WSAStartup(0x0202, &wsa_state) != 0) {
 203             err = WSAGetLastError();
 204             SYSerr(SYS_F_WSASTARTUP, err);
 205             BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
 206             return (-1);
 207         }
 208     }
 209 # endif                         /* OPENSSL_SYS_WINDOWS */
 210 # ifdef WATT32
 211     extern int _watt_do_exit;
 212     _watt_do_exit = 0;          /* don't make sock_init() call exit() */
 213     if (sock_init())
 214         return (-1);
 215 # endif
 216
 217 # if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 218     WORD wVerReq;
 219     WSADATA wsaData;
 220     int err;
 221
 222     if (!wsa_init_done) {
 223         wsa_init_done = 1;
 224         wVerReq = MAKEWORD(2, 0);
 225         err = WSAStartup(wVerReq, &wsaData);
 226         if (err != 0) {
 227             SYSerr(SYS_F_WSASTARTUP, err);
 228             BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
 229             return (-1);
 230         }
 231     }
 232 # endif
 233
 234     return (1);
 235 }
 236
 237 void BIO_sock_cleanup(void)
 238 {
 239 # ifdef OPENSSL_SYS_WINDOWS
 240     if (wsa_init_done) {
 241         wsa_init_done = 0;
 242         WSACleanup();
 243     }
 244 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
 245     if (wsa_init_done) {
 246         wsa_init_done = 0;
 247         WSACleanup();
 248     }
 249 # endif
 250 }
 251
 252 # if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
 253
 254 int BIO_socket_ioctl(int fd, long type, void *arg)
 255 {
 256     int i;
 257
 258 #  ifdef __DJGPP__
 259     i = ioctlsocket(fd, type, (char *)arg);
 260 #  else
 261 #   if defined(OPENSSL_SYS_VMS)
 262     /*-
 263      * 2011-02-18 SMS.
 264      * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
 265      * observe that all the consumers pass in an "unsigned long *",
 266      * so we arrange a local copy with a short pointer, and use
 267      * that, instead.
 268      */
 269 #    if __INITIAL_POINTER_SIZE == 64
 270 #     define ARG arg_32p
 271 #     pragma pointer_size save
 272 #     pragma pointer_size 32
 273     unsigned long arg_32;
 274     unsigned long *arg_32p;
 275 #     pragma pointer_size restore
 276     arg_32p = &arg_32;
 277     arg_32 = *((unsigned long *)arg);
 278 #    else                       /* __INITIAL_POINTER_SIZE == 64 */
 279 #     define ARG arg
 280 #    endif                      /* __INITIAL_POINTER_SIZE == 64 [else] */
 281 #   else                        /* defined(OPENSSL_SYS_VMS) */
 282 #    define ARG arg
 283 #   endif                       /* defined(OPENSSL_SYS_VMS) [else] */
 284
 285     i = ioctlsocket(fd, type, ARG);
 286 #  endif                        /* __DJGPP__ */
 287     if (i < 0)
 288         SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
 289     return (i);
 290 }
 291 # endif                         /* __VMS_VER */
 292
 293 # if OPENSSL_API_COMPAT < 0x10100000L
 294 int BIO_get_accept_socket(char *host, int bind_mode)
 295 {
 296     int s = INVALID_SOCKET;
 297     char *h = NULL, *p = NULL;
 298     BIO_ADDRINFO *res = NULL;
 299
 300     if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
 301         return INVALID_SOCKET;
 302
 303     if (BIO_sock_init() != 1)
 304         return INVALID_SOCKET;
 305
 306     if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
 307         goto err;
 308
 309     if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
 310                         BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
 311         s = INVALID_SOCKET;
 312         goto err;
 313     }
 314
 315     if (!BIO_listen(s, BIO_ADDRINFO_address(res),
 316                     bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
 317         BIO_closesocket(s);
 318         s = INVALID_SOCKET;
 319     }
 320
 321  err:
 322     BIO_ADDRINFO_free(res);
 323     OPENSSL_free(h);
 324     OPENSSL_free(p);
 325
 326     return s;
 327 }
 328
 329 int BIO_accept(int sock, char **ip_port)
 330 {
 331     BIO_ADDR *res = BIO_ADDR_new();
 332     int ret = -1;
 333
 334     if (res == NULL) {
 335         BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
 336         return ret;
 337     }
 338
 339     ret = BIO_accept_ex(sock, res, 0);
 340
 341     if (ret == (int)INVALID_SOCKET) {
 342         if (BIO_sock_should_retry(ret)) {
 343             ret = -2;
 344             goto end;
 345         }
 346         SYSerr(SYS_F_ACCEPT, get_last_socket_error());
 347         BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
 348         goto end;
 349     }
 350
 351     if (ip_port != NULL) {
 352         char *host = BIO_ADDR_hostname_string(res, 1);
 353         char *port = BIO_ADDR_service_string(res, 1);
 354         *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
 355         strcpy(*ip_port, host);
 356         strcat(*ip_port, ":");
 357         strcat(*ip_port, port);
 358         OPENSSL_free(host);
 359         OPENSSL_free(port);
 360     }
 361
 362  end:
 363     BIO_ADDR_free(res);
 364     return ret;
 365 }
 366 # endif
 367
 368 int BIO_set_tcp_ndelay(int s, int on)
 369 {
 370     int ret = 0;
 371 # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 372     int opt;
 373
 374 #  ifdef SOL_TCP
 375     opt = SOL_TCP;
 376 #  else
 377 #   ifdef IPPROTO_TCP
 378     opt = IPPROTO_TCP;
 379 #   endif
 380 #  endif
 381
 382     ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
 383 # endif
 384     return (ret == 0);
 385 }
 386
 387 int BIO_socket_nbio(int s, int mode)
 388 {
 389     int ret = -1;
 390     int l;
 391
 392     l = mode;
 393 # ifdef FIONBIO
 394     ret = BIO_socket_ioctl(s, FIONBIO, &l);
 395 # endif
 396     return (ret == 0);
 397 }
 398
 399 int BIO_sock_info(int sock,
 400                   enum BIO_sock_info_type type, union BIO_sock_info_u *info)
 401 {
 402     switch (type) {
 403     case BIO_SOCK_INFO_ADDRESS:
 404         {
 405             socklen_t addr_len;
 406             int ret = 0;
 407             addr_len = sizeof(*info->addr);
 408             ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
 409                               &addr_len);
 410             if (ret == -1) {
 411                 SYSerr(SYS_F_GETSOCKNAME, get_last_socket_error());
 412                 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
 413                 return 0;
 414             }
 415             if (addr_len > sizeof(*info->addr)) {
 416                 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
 417                 return 0;
 418             }
 419         }
 420         break;
 421     default:
 422         BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
 423         return 0;
 424     }
 425     return 1;
 426 }
 427
 428 #endif