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>
29typedef int socklen_t;
30#endif
31
32#include "internal.h"
33
34
35int 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
76out:
77  freeaddrinfo(result);
78  return ret;
79}
80
81int 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
100void bio_clear_socket_error(void) {}
101
102int 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