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 # define SOCKET_PROTOCOL IPPROTO_TCP
  68 # ifdef SO_MAXCONN
  69 #  define MAX_LISTEN  SO_MAXCONN
  70 # elif defined(SOMAXCONN)
  71 #  define MAX_LISTEN  SOMAXCONN
  72 # else
  73 #  define MAX_LISTEN  32
  74 # endif
  75 # if defined(OPENSSL_SYS_WINDOWS)
  76 static int wsa_init_done = 0;
  77 # endif
  78
  79 # if OPENSSL_API_COMPAT < 0x10100000L
  80 int BIO_get_host_ip(const char *str, unsigned char *ip)
  81 {
  82     BIO_ADDRINFO *res = NULL;
  83     int ret = 0;
  84
  85     if (BIO_sock_init() != 1)
  86         return 0;               /* don't generate another error code here */
  87
  88     if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
  89         size_t l;
  90
  91         if (BIO_ADDRINFO_family(res) != AF_INET) {
  92             BIOerr(BIO_F_BIO_GET_HOST_IP,
  93                    BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
  94         } else {
  95             BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l);
  96             /* Because only AF_INET addresses will reach this far,
  97                we can assert that l should be 4 */
  98             OPENSSL_assert(l == 4);
  99
 100             BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
 101             ret = 1;
 102         }
 103         BIO_ADDRINFO_free(res);
 104     } else {
 105         ERR_add_error_data(2, "host=", str);
 106     }
 107
 108     return ret;
 109 }
 110
 111 int BIO_get_port(const char *str, unsigned short *port_ptr)
 112 {
 113     BIO_ADDRINFO *res = NULL;
 114     int ret = 0;
 115
 116     if (str == NULL) {
 117         BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
 118         return (0);
 119     }
 120
 121     if (BIO_sock_init() != 1)
 122         return 0;               /* don't generate another error code here */
 123
 124     if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
 125         if (BIO_ADDRINFO_family(res) != AF_INET) {
 126             BIOerr(BIO_F_BIO_GET_PORT,
 127                    BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
 128         } else {
 129             *port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
 130             ret = 1;
 131         }
 132         BIO_ADDRINFO_free(res);
 133     } else {
 134         ERR_add_error_data(2, "host=", str);
 135     }
 136
 137     return ret;
 138 }
 139 # endif
 140
 141 int BIO_sock_error(int sock)
 142 {
 143     int j = 0, i;
 144     socklen_t size = sizeof(j);
 145
 146     /*
 147      * Note: under Windows the third parameter is of type (char *) whereas
 148      * under other systems it is (void *) if you don't have a cast it will
 149      * choke the compiler: if you do have a cast then you can either go for
 150      * (char *) or (void *).
 151      */
 152     i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
 153     if (i < 0)
 154         return (get_last_socket_error());
 155     else
 156         return (j);
 157 }
 158
 159 # if OPENSSL_API_COMPAT < 0x10100000L
 160 struct hostent *BIO_gethostbyname(const char *name)
 161 {
 162     /*
 163      * Caching gethostbyname() results forever is wrong, so we have to let
 164      * the true gethostbyname() worry about this
 165      */
 166 #  if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
 167     return gethostbyname((char *)name);
 168 #  else
 169     return gethostbyname(name);
 170 #  endif
 171 }
 172 # endif
 173
 174 int BIO_sock_init(void)
 175 {
 176 # ifdef OPENSSL_SYS_WINDOWS
 177     static struct WSAData wsa_state;
 178
 179     if (!wsa_init_done) {
 180         int err;
 181
 182         wsa_init_done = 1;
 183         memset(&wsa_state, 0, sizeof(wsa_state));
 184         /*
 185          * Not making wsa_state available to the rest of the code is formally
 186          * wrong. But the structures we use are [believed to be] invariable
 187          * among Winsock DLLs, while API availability is [expected to be]
 188          * probed at run-time with DSO_global_lookup.
 189          */
 190         if (WSAStartup(0x0202, &wsa_state) != 0) {
 191             err = WSAGetLastError();
 192             SYSerr(SYS_F_WSASTARTUP, err);
 193             BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
 194             return (-1);
 195         }
 196     }
 197 # endif                         /* OPENSSL_SYS_WINDOWS */
 198 # ifdef WATT32
 199     extern int _watt_do_exit;
 200     _watt_do_exit = 0;          /* don't make sock_init() call exit() */
 201     if (sock_init())
 202         return (-1);
 203 # endif
 204
 205     return (1);
 206 }
 207
 208 void bio_sock_cleanup_int(void)
 209 {
 210 # ifdef OPENSSL_SYS_WINDOWS
 211     if (wsa_init_done) {
 212         wsa_init_done = 0;
 213         WSACleanup();
 214     }
 215 # endif
 216 }
 217
 218 # if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
 219
 220 int BIO_socket_ioctl(int fd, long type, void *arg)
 221 {
 222     int i;
 223
 224 #  ifdef __DJGPP__
 225     i = ioctlsocket(fd, type, (char *)arg);
 226 #  else
 227 #   if defined(OPENSSL_SYS_VMS)
 228     /*-
 229      * 2011-02-18 SMS.
 230      * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
 231      * observe that all the consumers pass in an "unsigned long *",
 232      * so we arrange a local copy with a short pointer, and use
 233      * that, instead.
 234      */
 235 #    if __INITIAL_POINTER_SIZE == 64
 236 #     define ARG arg_32p
 237 #     pragma pointer_size save
 238 #     pragma pointer_size 32
 239     unsigned long arg_32;
 240     unsigned long *arg_32p;
 241 #     pragma pointer_size restore
 242     arg_32p = &arg_32;
 243     arg_32 = *((unsigned long *)arg);
 244 #    else                       /* __INITIAL_POINTER_SIZE == 64 */
 245 #     define ARG arg
 246 #    endif                      /* __INITIAL_POINTER_SIZE == 64 [else] */
 247 #   else                        /* defined(OPENSSL_SYS_VMS) */
 248 #    define ARG arg
 249 #   endif                       /* defined(OPENSSL_SYS_VMS) [else] */
 250
 251     i = ioctlsocket(fd, type, ARG);
 252 #  endif                        /* __DJGPP__ */
 253     if (i < 0)
 254         SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
 255     return (i);
 256 }
 257 # endif                         /* __VMS_VER */
 258
 259 # if OPENSSL_API_COMPAT < 0x10100000L
 260 int BIO_get_accept_socket(char *host, int bind_mode)
 261 {
 262     int s = INVALID_SOCKET;
 263     char *h = NULL, *p = NULL;
 264     BIO_ADDRINFO *res = NULL;
 265
 266     if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
 267         return INVALID_SOCKET;
 268
 269     if (BIO_sock_init() != 1)
 270         return INVALID_SOCKET;
 271
 272     if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
 273         goto err;
 274
 275     if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
 276                         BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
 277         s = INVALID_SOCKET;
 278         goto err;
 279     }
 280
 281     if (!BIO_listen(s, BIO_ADDRINFO_address(res),
 282                     bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
 283         BIO_closesocket(s);
 284         s = INVALID_SOCKET;
 285     }
 286
 287  err:
 288     BIO_ADDRINFO_free(res);
 289     OPENSSL_free(h);
 290     OPENSSL_free(p);
 291
 292     return s;
 293 }
 294
 295 int BIO_accept(int sock, char **ip_port)
 296 {
 297     BIO_ADDR res;
 298     int ret = -1;
 299
 300     ret = BIO_accept_ex(sock, &res, 0);
 301     if (ret == (int)INVALID_SOCKET) {
 302         if (BIO_sock_should_retry(ret)) {
 303             ret = -2;
 304             goto end;
 305         }
 306         SYSerr(SYS_F_ACCEPT, get_last_socket_error());
 307         BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
 308         goto end;
 309     }
 310
 311     if (ip_port != NULL) {
 312         char *host = BIO_ADDR_hostname_string(&res, 1);
 313         char *port = BIO_ADDR_service_string(&res, 1);
 314         *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
 315         strcpy(*ip_port, host);
 316         strcat(*ip_port, ":");
 317         strcat(*ip_port, port);
 318         OPENSSL_free(host);
 319         OPENSSL_free(port);
 320     }
 321
 322  end:
 323     return ret;
 324 }
 325 # endif
 326
 327 int BIO_set_tcp_ndelay(int s, int on)
 328 {
 329     int ret = 0;
 330 # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
 331     int opt;
 332
 333 #  ifdef SOL_TCP
 334     opt = SOL_TCP;
 335 #  else
 336 #   ifdef IPPROTO_TCP
 337     opt = IPPROTO_TCP;
 338 #   endif
 339 #  endif
 340
 341     ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
 342 # endif
 343     return (ret == 0);
 344 }
 345
 346 int BIO_socket_nbio(int s, int mode)
 347 {
 348     int ret = -1;
 349     int l;
 350
 351     l = mode;
 352 # ifdef FIONBIO
 353     l = mode;
 354
 355     ret = BIO_socket_ioctl(s, FIONBIO, &l);
 356 # elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
 357     /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
 358
 359     l = fcntl(s, F_GETFL, 0);
 360     if (l == -1) {
 361         SYSerr(SYS_F_FCNTL, get_last_rtl_error());
 362         ret = -1;
 363     } else {
 364 #  if defined(O_NONBLOCK)
 365         l &= ~O_NONBLOCK;
 366 #  else
 367         l &= ~FNDELAY; /* BSD4.x */
 368 #  endif
 369         if (mode) {
 370 #  if defined(O_NONBLOCK)
 371             l |= O_NONBLOCK;
 372 #  else
 373             l |= FNDELAY; /* BSD4.x */
 374 #  endif
 375         }
 376         ret = fcntl(s, F_SETFL, l);
 377
 378         if (ret < 0) {
 379             SYSerr(SYS_F_FCNTL, get_last_rtl_error());
 380         }
 381     }
 382 # else
 383     /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
 384     BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
 385 # endif
 386
 387     return (ret == 0);
 388 }
 389
 390 int BIO_sock_info(int sock,
 391                   enum BIO_sock_info_type type, union BIO_sock_info_u *info)
 392 {
 393     switch (type) {
 394     case BIO_SOCK_INFO_ADDRESS:
 395         {
 396             socklen_t addr_len;
 397             int ret = 0;
 398             addr_len = sizeof(*info->addr);
 399             ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
 400                               &addr_len);
 401             if (ret == -1) {
 402                 SYSerr(SYS_F_GETSOCKNAME, get_last_socket_error());
 403                 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
 404                 return 0;
 405             }
 406             if ((size_t)addr_len > sizeof(*info->addr)) {
 407                 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
 408                 return 0;
 409             }
 410         }
 411         break;
 412     default:
 413         BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
 414         return 0;
 415     }
 416     return 1;
 417 }
 418
 419 #endif