1 /*
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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)
24 static int wsa_init_done = 0;
25 # endif
26
27 # if OPENSSL_API_COMPAT < 0x10100000L
BIO_get_host_ip(const char * str,unsigned char * ip)28 int 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
BIO_get_port(const char * str,unsigned short * port_ptr)58 int 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
BIO_sock_error(int sock)88 int 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 # if OPENSSL_API_COMPAT < 0x10100000L
BIO_gethostbyname(const char * name)107 struct 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
BIO_sock_init(void)117 int BIO_sock_init(void)
118 {
119 # ifdef OPENSSL_SYS_WINDOWS
120 static struct WSAData wsa_state;
121
122 if (!wsa_init_done) {
123 int err;
124
125 wsa_init_done = 1;
126 memset(&wsa_state, 0, sizeof(wsa_state));
127 /*
128 * Not making wsa_state available to the rest of the code is formally
129 * wrong. But the structures we use are [believed to be] invariable
130 * among Winsock DLLs, while API availability is [expected to be]
131 * probed at run-time with DSO_global_lookup.
132 */
133 if (WSAStartup(0x0202, &wsa_state) != 0) {
134 err = WSAGetLastError();
135 SYSerr(SYS_F_WSASTARTUP, err);
136 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
137 return -1;
138 }
139 }
140 # endif /* OPENSSL_SYS_WINDOWS */
141 # ifdef WATT32
142 extern int _watt_do_exit;
143 _watt_do_exit = 0; /* don't make sock_init() call exit() */
144 if (sock_init())
145 return -1;
146 # endif
147
148 return 1;
149 }
150
bio_sock_cleanup_int(void)151 void bio_sock_cleanup_int(void)
152 {
153 # ifdef OPENSSL_SYS_WINDOWS
154 if (wsa_init_done) {
155 wsa_init_done = 0;
156 WSACleanup();
157 }
158 # endif
159 }
160
BIO_socket_ioctl(int fd,long type,void * arg)161 int BIO_socket_ioctl(int fd, long type, void *arg)
162 {
163 int i;
164
165 # ifdef __DJGPP__
166 i = ioctlsocket(fd, type, (char *)arg);
167 # else
168 # if defined(OPENSSL_SYS_VMS)
169 /*-
170 * 2011-02-18 SMS.
171 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
172 * observe that all the consumers pass in an "unsigned long *",
173 * so we arrange a local copy with a short pointer, and use
174 * that, instead.
175 */
176 # if __INITIAL_POINTER_SIZE == 64
177 # define ARG arg_32p
178 # pragma pointer_size save
179 # pragma pointer_size 32
180 unsigned long arg_32;
181 unsigned long *arg_32p;
182 # pragma pointer_size restore
183 arg_32p = &arg_32;
184 arg_32 = *((unsigned long *)arg);
185 # else /* __INITIAL_POINTER_SIZE == 64 */
186 # define ARG arg
187 # endif /* __INITIAL_POINTER_SIZE == 64 [else] */
188 # else /* defined(OPENSSL_SYS_VMS) */
189 # define ARG arg
190 # endif /* defined(OPENSSL_SYS_VMS) [else] */
191
192 i = ioctlsocket(fd, type, ARG);
193 # endif /* __DJGPP__ */
194 if (i < 0)
195 SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
196 return i;
197 }
198
199 # if OPENSSL_API_COMPAT < 0x10100000L
BIO_get_accept_socket(char * host,int bind_mode)200 int BIO_get_accept_socket(char *host, int bind_mode)
201 {
202 int s = INVALID_SOCKET;
203 char *h = NULL, *p = NULL;
204 BIO_ADDRINFO *res = NULL;
205
206 if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
207 return INVALID_SOCKET;
208
209 if (BIO_sock_init() != 1)
210 return INVALID_SOCKET;
211
212 if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
213 goto err;
214
215 if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
216 BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
217 s = INVALID_SOCKET;
218 goto err;
219 }
220
221 if (!BIO_listen(s, BIO_ADDRINFO_address(res),
222 bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
223 BIO_closesocket(s);
224 s = INVALID_SOCKET;
225 }
226
227 err:
228 BIO_ADDRINFO_free(res);
229 OPENSSL_free(h);
230 OPENSSL_free(p);
231
232 return s;
233 }
234
BIO_accept(int sock,char ** ip_port)235 int BIO_accept(int sock, char **ip_port)
236 {
237 BIO_ADDR res;
238 int ret = -1;
239
240 ret = BIO_accept_ex(sock, &res, 0);
241 if (ret == (int)INVALID_SOCKET) {
242 if (BIO_sock_should_retry(ret)) {
243 ret = -2;
244 goto end;
245 }
246 SYSerr(SYS_F_ACCEPT, get_last_socket_error());
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
BIO_set_tcp_ndelay(int s,int on)277 int 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
BIO_socket_nbio(int s,int mode)296 int 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 SYSerr(SYS_F_FCNTL, get_last_sys_error());
312 ret = -1;
313 } else {
314 # if defined(O_NONBLOCK)
315 l &= ~O_NONBLOCK;
316 # else
317 l &= ~FNDELAY; /* BSD4.x */
318 # endif
319 if (mode) {
320 # if defined(O_NONBLOCK)
321 l |= O_NONBLOCK;
322 # else
323 l |= FNDELAY; /* BSD4.x */
324 # endif
325 }
326 ret = fcntl(s, F_SETFL, l);
327
328 if (ret < 0) {
329 SYSerr(SYS_F_FCNTL, get_last_sys_error());
330 }
331 }
332 # else
333 /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
334 BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
335 # endif
336
337 return (ret == 0);
338 }
339
BIO_sock_info(int sock,enum BIO_sock_info_type type,union BIO_sock_info_u * info)340 int BIO_sock_info(int sock,
341 enum BIO_sock_info_type type, union BIO_sock_info_u *info)
342 {
343 switch (type) {
344 case BIO_SOCK_INFO_ADDRESS:
345 {
346 socklen_t addr_len;
347 int ret = 0;
348 addr_len = sizeof(*info->addr);
349 ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
350 &addr_len);
351 if (ret == -1) {
352 SYSerr(SYS_F_GETSOCKNAME, get_last_socket_error());
353 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
354 return 0;
355 }
356 if ((size_t)addr_len > sizeof(*info->addr)) {
357 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
358 return 0;
359 }
360 }
361 break;
362 default:
363 BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
364 return 0;
365 }
366 return 1;
367 }
368
369 #endif
370