Home | History | Annotate | Download | only in bio 
      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 #define _POSIX_SOURCE
     16 
     17 #include <openssl/bio.h>
     18 #include <openssl/err.h>
     19 
     20 #include <fcntl.h>
     21 #include <sys/types.h>
     22 
     23 #if !defined(OPENSSL_WINDOWS)
     24 #include <netdb.h>
     25 #include <unistd.h>
     26 #else
     27 #include <WinSock2.h>
     28 #include <WS2tcpip.h>
     29 typedef int socklen_t;
     30 #endif
     31 
     32 #include "internal.h"
     33 
     34 
     35 int bio_ip_and_port_to_socket_and_addr(int *out_sock,
     36                                        struct sockaddr_storage *out_addr,
     37                                        socklen_t *out_addr_length,
     38                                        const char *hostname,
     39                                        const char *port_str) {
     40   struct addrinfo hint, *result, *cur;
     41   int ret;
     42 
     43   *out_sock = -1;
     44 
     45   memset(&hint, 0, sizeof(hint));
     46   hint.ai_family = AF_UNSPEC;
     47   hint.ai_socktype = SOCK_STREAM;
     48 
     49   ret = getaddrinfo(hostname, port_str, &hint, &result);
     50   if (ret != 0) {
     51     OPENSSL_PUT_ERROR(SYS, getaddrinfo, 0);
     52     ERR_add_error_data(2, gai_strerror(ret));
     53     return 0;
     54   }
     55 
     56   ret = 0;
     57 
     58   for (cur = result; cur; cur = cur->ai_next) {
     59     if (cur->ai_addrlen > sizeof(struct sockaddr_storage)) {
     60       continue;
     61     }
     62     memset(out_addr, 0, sizeof(struct sockaddr_storage));
     63     memcpy(out_addr, cur->ai_addr, cur->ai_addrlen);
     64     *out_addr_length = cur->ai_addrlen;
     65 
     66     *out_sock = socket(cur->ai_family, cur->ai_socktype, cur->ai_protocol);
     67     if (*out_sock < 0) {
     68       OPENSSL_PUT_SYSTEM_ERROR(socket);
     69       goto out;
     70     }
     71 
     72     ret = 1;
     73     break;
     74   }
     75 
     76 out:
     77   freeaddrinfo(result);
     78   return ret;
     79 }
     80 
     81 int bio_socket_nbio(int sock, int on) {
     82 #if defined(OPENSSL_WINDOWS)
     83   u_long arg = on;
     84 
     85   return 0 == ioctlsocket(sock, FIONBIO, &arg);
     86 #else
     87   int flags = fcntl(sock, F_GETFL, 0);
     88   if (flags < 0) {
     89     return 0;
     90   }
     91   if (!on) {
     92     flags &= ~O_NONBLOCK;
     93   } else {
     94     flags |= O_NONBLOCK;
     95   }
     96   return fcntl(sock, F_SETFL, flags) == 0;
     97 #endif
     98 }
     99 
    100 void bio_clear_socket_error(void) {}
    101 
    102 int bio_sock_error(int sock) {
    103   int error;
    104   socklen_t error_size = sizeof(error);
    105 
    106   if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (char *)&error, &error_size) < 0) {
    107     return 1;
    108   }
    109   return error;
    110 }
    111