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      1 /* Copyright (c) 2014, Google Inc.
      2  *
      3  * Permission to use, copy, modify, and/or distribute this software for any
      4  * purpose with or without fee is hereby granted, provided that the above
      5  * copyright notice and this permission notice appear in all copies.
      6  *
      7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     10  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
     12  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
     13  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
     14 
     15 #undef _POSIX_C_SOURCE
     16 #define _POSIX_C_SOURCE 200112L
     17 
     18 #include <openssl/bio.h>
     19 #include <openssl/err.h>
     20 
     21 #if !defined(OPENSSL_TRUSTY)
     22 
     23 #include <fcntl.h>
     24 #include <string.h>
     25 #include <sys/types.h>
     26 
     27 #if !defined(OPENSSL_WINDOWS)
     28 #include <netdb.h>
     29 #include <unistd.h>
     30 #else
     31 OPENSSL_MSVC_PRAGMA(warning(push, 3))
     32 #include <winsock2.h>
     33 #include <ws2tcpip.h>
     34 OPENSSL_MSVC_PRAGMA(warning(pop))
     35 #endif
     36 
     37 #include "internal.h"
     38 #include "../internal.h"
     39 
     40 
     41 int bio_ip_and_port_to_socket_and_addr(int *out_sock,
     42                                        struct sockaddr_storage *out_addr,
     43                                        socklen_t *out_addr_length,
     44                                        const char *hostname,
     45                                        const char *port_str) {
     46   struct addrinfo hint, *result, *cur;
     47   int ret;
     48 
     49   *out_sock = -1;
     50 
     51   OPENSSL_memset(&hint, 0, sizeof(hint));
     52   hint.ai_family = AF_UNSPEC;
     53   hint.ai_socktype = SOCK_STREAM;
     54 
     55   ret = getaddrinfo(hostname, port_str, &hint, &result);
     56   if (ret != 0) {
     57     OPENSSL_PUT_ERROR(SYS, 0);
     58     ERR_add_error_data(1, gai_strerror(ret));
     59     return 0;
     60   }
     61 
     62   ret = 0;
     63 
     64   for (cur = result; cur; cur = cur->ai_next) {
     65     if ((size_t) cur->ai_addrlen > sizeof(struct sockaddr_storage)) {
     66       continue;
     67     }
     68     OPENSSL_memset(out_addr, 0, sizeof(struct sockaddr_storage));
     69     OPENSSL_memcpy(out_addr, cur->ai_addr, cur->ai_addrlen);
     70     *out_addr_length = cur->ai_addrlen;
     71 
     72     *out_sock = socket(cur->ai_family, cur->ai_socktype, cur->ai_protocol);
     73     if (*out_sock < 0) {
     74       OPENSSL_PUT_SYSTEM_ERROR();
     75       goto out;
     76     }
     77 
     78     ret = 1;
     79     break;
     80   }
     81 
     82 out:
     83   freeaddrinfo(result);
     84   return ret;
     85 }
     86 
     87 int bio_socket_nbio(int sock, int on) {
     88 #if defined(OPENSSL_WINDOWS)
     89   u_long arg = on;
     90 
     91   return 0 == ioctlsocket(sock, FIONBIO, &arg);
     92 #else
     93   int flags = fcntl(sock, F_GETFL, 0);
     94   if (flags < 0) {
     95     return 0;
     96   }
     97   if (!on) {
     98     flags &= ~O_NONBLOCK;
     99   } else {
    100     flags |= O_NONBLOCK;
    101   }
    102   return fcntl(sock, F_SETFL, flags) == 0;
    103 #endif
    104 }
    105 
    106 void bio_clear_socket_error(void) {}
    107 
    108 int bio_sock_error(int sock) {
    109   int error;
    110   socklen_t error_size = sizeof(error);
    111 
    112   if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (char *)&error, &error_size) < 0) {
    113     return 1;
    114   }
    115   return error;
    116 }
    117 
    118 #endif  // OPENSSL_TRUSTY
    119