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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 #include <fcntl.h>
22 #include <string.h>
23 #include <sys/types.h>
24 
25 #if !defined(OPENSSL_WINDOWS)
26 #include <netdb.h>
27 #include <unistd.h>
28 #else
29 #pragma warning(push, 3)
30 #include <winsock2.h>
31 #include <ws2tcpip.h>
32 #pragma warning(pop)
33 #endif
34 
35 #include "internal.h"
36 
37 
bio_ip_and_port_to_socket_and_addr(int * out_sock,struct sockaddr_storage * out_addr,socklen_t * out_addr_length,const char * hostname,const char * port_str)38 int bio_ip_and_port_to_socket_and_addr(int *out_sock,
39                                        struct sockaddr_storage *out_addr,
40                                        socklen_t *out_addr_length,
41                                        const char *hostname,
42                                        const char *port_str) {
43   struct addrinfo hint, *result, *cur;
44   int ret;
45 
46   *out_sock = -1;
47 
48   memset(&hint, 0, sizeof(hint));
49   hint.ai_family = AF_UNSPEC;
50   hint.ai_socktype = SOCK_STREAM;
51 
52   ret = getaddrinfo(hostname, port_str, &hint, &result);
53   if (ret != 0) {
54     OPENSSL_PUT_ERROR(SYS, 0);
55     ERR_add_error_data(1, gai_strerror(ret));
56     return 0;
57   }
58 
59   ret = 0;
60 
61   for (cur = result; cur; cur = cur->ai_next) {
62     if ((size_t) cur->ai_addrlen > sizeof(struct sockaddr_storage)) {
63       continue;
64     }
65     memset(out_addr, 0, sizeof(struct sockaddr_storage));
66     memcpy(out_addr, cur->ai_addr, cur->ai_addrlen);
67     *out_addr_length = cur->ai_addrlen;
68 
69     *out_sock = socket(cur->ai_family, cur->ai_socktype, cur->ai_protocol);
70     if (*out_sock < 0) {
71       OPENSSL_PUT_SYSTEM_ERROR();
72       goto out;
73     }
74 
75     ret = 1;
76     break;
77   }
78 
79 out:
80   freeaddrinfo(result);
81   return ret;
82 }
83 
bio_socket_nbio(int sock,int on)84 int bio_socket_nbio(int sock, int on) {
85 #if defined(OPENSSL_WINDOWS)
86   u_long arg = on;
87 
88   return 0 == ioctlsocket(sock, FIONBIO, &arg);
89 #else
90   int flags = fcntl(sock, F_GETFL, 0);
91   if (flags < 0) {
92     return 0;
93   }
94   if (!on) {
95     flags &= ~O_NONBLOCK;
96   } else {
97     flags |= O_NONBLOCK;
98   }
99   return fcntl(sock, F_SETFL, flags) == 0;
100 #endif
101 }
102 
bio_clear_socket_error(void)103 void bio_clear_socket_error(void) {}
104 
bio_sock_error(int sock)105 int bio_sock_error(int sock) {
106   int error;
107   socklen_t error_size = sizeof(error);
108 
109   if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (char *)&error, &error_size) < 0) {
110     return 1;
111   }
112   return error;
113 }
114