1/*
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <errno.h>
13#include "bio_local.h"
14#ifndef OPENSSL_NO_SOCK
15# define SOCKET_PROTOCOL IPPROTO_TCP
16# ifdef SO_MAXCONN
17# define MAX_LISTEN SO_MAXCONN
18# elif defined(SOMAXCONN)
19# define MAX_LISTEN SOMAXCONN
20# else
21# define MAX_LISTEN 32
22# endif
23# if defined(OPENSSL_SYS_WINDOWS)
24static int wsa_init_done = 0;
25# endif
26
27# ifndef OPENSSL_NO_DEPRECATED_1_1_0
28int BIO_get_host_ip(const char *str, unsigned char *ip)
29{
30 BIO_ADDRINFO *res = NULL;
31 int ret = 0;
32
33 if (BIO_sock_init() != 1)
34 return 0; /* don't generate another error code here */
35
36 if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
37 size_t l;
38
39 if (BIO_ADDRINFO_family(res) != AF_INET) {
40 BIOerr(BIO_F_BIO_GET_HOST_IP,
41 BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
42 } else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
43 /*
44 * Because only AF_INET addresses will reach this far, we can assert
45 * that l should be 4
46 */
47 if (ossl_assert(l == 4))
48 ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
49 }
50 BIO_ADDRINFO_free(res);
51 } else {
52 ERR_add_error_data(2, "host=", str);
53 }
54
55 return ret;
56}
57
58int BIO_get_port(const char *str, unsigned short *port_ptr)
59{
60 BIO_ADDRINFO *res = NULL;
61 int ret = 0;
62
63 if (str == NULL) {
64 BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
65 return 0;
66 }
67
68 if (BIO_sock_init() != 1)
69 return 0; /* don't generate another error code here */
70
71 if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
72 if (BIO_ADDRINFO_family(res) != AF_INET) {
73 BIOerr(BIO_F_BIO_GET_PORT,
74 BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
75 } else {
76 *port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
77 ret = 1;
78 }
79 BIO_ADDRINFO_free(res);
80 } else {
81 ERR_add_error_data(2, "host=", str);
82 }
83
84 return ret;
85}
86# endif
87
88int BIO_sock_error(int sock)
89{
90 int j = 0, i;
91 socklen_t size = sizeof(j);
92
93 /*
94 * Note: under Windows the third parameter is of type (char *) whereas
95 * under other systems it is (void *) if you don't have a cast it will
96 * choke the compiler: if you do have a cast then you can either go for
97 * (char *) or (void *).
98 */
99 i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
100 if (i < 0)
101 return get_last_socket_error();
102 else
103 return j;
104}
105
106# ifndef OPENSSL_NO_DEPRECATED_1_1_0
107struct hostent *BIO_gethostbyname(const char *name)
108{
109 /*
110 * Caching gethostbyname() results forever is wrong, so we have to let
111 * the true gethostbyname() worry about this
112 */
113 return gethostbyname(name);
114}
115# endif
116
117int BIO_sock_init(void)
118{
119# ifdef OPENSSL_SYS_WINDOWS
120 static struct WSAData wsa_state;
121
122 if (!wsa_init_done) {
123 wsa_init_done = 1;
124 memset(&wsa_state, 0, sizeof(wsa_state));
125 /*
126 * Not making wsa_state available to the rest of the code is formally
127 * wrong. But the structures we use are [believed to be] invariable
128 * among Winsock DLLs, while API availability is [expected to be]
129 * probed at run-time with DSO_global_lookup.
130 */
131 if (WSAStartup(0x0202, &wsa_state) != 0) {
132 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
133 "calling wsastartup()");
134 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
135 return -1;
136 }
137 }
138# endif /* OPENSSL_SYS_WINDOWS */
139# ifdef WATT32
140 extern int _watt_do_exit;
141 _watt_do_exit = 0; /* don't make sock_init() call exit() */
142 if (sock_init())
143 return -1;
144# endif
145
146 return 1;
147}
148
149void bio_sock_cleanup_int(void)
150{
151# ifdef OPENSSL_SYS_WINDOWS
152 if (wsa_init_done) {
153 wsa_init_done = 0;
154 WSACleanup();
155 }
156# endif
157}
158
159int BIO_socket_ioctl(int fd, long type, void *arg)
160{
161 int i;
162
163# ifdef __DJGPP__
164 i = ioctlsocket(fd, type, (char *)arg);
165# else
166# if defined(OPENSSL_SYS_VMS)
167 /*-
168 * 2011-02-18 SMS.
169 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
170 * observe that all the consumers pass in an "unsigned long *",
171 * so we arrange a local copy with a short pointer, and use
172 * that, instead.
173 */
174# if __INITIAL_POINTER_SIZE == 64
175# define ARG arg_32p
176# pragma pointer_size save
177# pragma pointer_size 32
178 unsigned long arg_32;
179 unsigned long *arg_32p;
180# pragma pointer_size restore
181 arg_32p = &arg_32;
182 arg_32 = *((unsigned long *)arg);
183# else /* __INITIAL_POINTER_SIZE == 64 */
184# define ARG arg
185# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
186# else /* defined(OPENSSL_SYS_VMS) */
187# define ARG arg
188# endif /* defined(OPENSSL_SYS_VMS) [else] */
189
190 i = ioctlsocket(fd, type, ARG);
191# endif /* __DJGPP__ */
192 if (i < 0)
193 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
194 "calling ioctlsocket()");
195 return i;
196}
197
198# ifndef OPENSSL_NO_DEPRECATED_1_1_0
199int BIO_get_accept_socket(char *host, int bind_mode)
200{
201 int s = INVALID_SOCKET;
202 char *h = NULL, *p = NULL;
203 BIO_ADDRINFO *res = NULL;
204
205 if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
206 return INVALID_SOCKET;
207
208 if (BIO_sock_init() != 1)
209 return INVALID_SOCKET;
210
211 if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
212 goto err;
213
214 if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
215 BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
216 s = INVALID_SOCKET;
217 goto err;
218 }
219
220 if (!BIO_listen(s, BIO_ADDRINFO_address(res),
221 bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
222 BIO_closesocket(s);
223 s = INVALID_SOCKET;
224 }
225
226 err:
227 BIO_ADDRINFO_free(res);
228 OPENSSL_free(h);
229 OPENSSL_free(p);
230
231 return s;
232}
233
234int BIO_accept(int sock, char **ip_port)
235{
236 BIO_ADDR res;
237 int ret = -1;
238
239 ret = BIO_accept_ex(sock, &res, 0);
240 if (ret == (int)INVALID_SOCKET) {
241 if (BIO_sock_should_retry(ret)) {
242 ret = -2;
243 goto end;
244 }
245 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
246 "calling accept()");
247 BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
248 goto end;
249 }
250
251 if (ip_port != NULL) {
252 char *host = BIO_ADDR_hostname_string(&res, 1);
253 char *port = BIO_ADDR_service_string(&res, 1);
254 if (host != NULL && port != NULL)
255 *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
256 else
257 *ip_port = NULL;
258
259 if (*ip_port == NULL) {
260 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
261 BIO_closesocket(ret);
262 ret = (int)INVALID_SOCKET;
263 } else {
264 strcpy(*ip_port, host);
265 strcat(*ip_port, ":");
266 strcat(*ip_port, port);
267 }
268 OPENSSL_free(host);
269 OPENSSL_free(port);
270 }
271
272 end:
273 return ret;
274}
275# endif
276
277int BIO_set_tcp_ndelay(int s, int on)
278{
279 int ret = 0;
280# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
281 int opt;
282
283# ifdef SOL_TCP
284 opt = SOL_TCP;
285# else
286# ifdef IPPROTO_TCP
287 opt = IPPROTO_TCP;
288# endif
289# endif
290
291 ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
292# endif
293 return (ret == 0);
294}
295
296int BIO_socket_nbio(int s, int mode)
297{
298 int ret = -1;
299 int l;
300
301 l = mode;
302# ifdef FIONBIO
303 l = mode;
304
305 ret = BIO_socket_ioctl(s, FIONBIO, &l);
306# elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
307 /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
308
309 l = fcntl(s, F_GETFL, 0);
310 if (l == -1) {
311 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
312 "calling fcntl()");
313 ret = -1;
314 } else {
315# if defined(O_NONBLOCK)
316 l &= ~O_NONBLOCK;
317# else
318 l &= ~FNDELAY; /* BSD4.x */
319# endif
320 if (mode) {
321# if defined(O_NONBLOCK)
322 l |= O_NONBLOCK;
323# else
324 l |= FNDELAY; /* BSD4.x */
325# endif
326 }
327 ret = fcntl(s, F_SETFL, l);
328
329 if (ret < 0) {
330 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
331 "calling fcntl()");
332 }
333 }
334# else
335 /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
336 BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
337# endif
338
339 return (ret == 0);
340}
341
342int BIO_sock_info(int sock,
343 enum BIO_sock_info_type type, union BIO_sock_info_u *info)
344{
345 switch (type) {
346 case BIO_SOCK_INFO_ADDRESS:
347 {
348 socklen_t addr_len;
349 int ret = 0;
350 addr_len = sizeof(*info->addr);
351 ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
352 &addr_len);
353 if (ret == -1) {
354 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
355 "calling getsockname()");
356 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
357 return 0;
358 }
359 if ((size_t)addr_len > sizeof(*info->addr)) {
360 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
361 return 0;
362 }
363 }
364 break;
365 default:
366 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
367 return 0;
368 }
369 return 1;
370}
371
372#endif
373