Line data Source code
1 : /* crypto/bio/bss_sock.c */
2 : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : * All rights reserved.
4 : *
5 : * This package is an SSL implementation written
6 : * by Eric Young (eay@cryptsoft.com).
7 : * The implementation was written so as to conform with Netscapes SSL.
8 : *
9 : * This library is free for commercial and non-commercial use as long as
10 : * the following conditions are aheared to. The following conditions
11 : * apply to all code found in this distribution, be it the RC4, RSA,
12 : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : * included with this distribution is covered by the same copyright terms
14 : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : *
16 : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : * the code are not to be removed.
18 : * If this package is used in a product, Eric Young should be given attribution
19 : * as the author of the parts of the library used.
20 : * This can be in the form of a textual message at program startup or
21 : * in documentation (online or textual) provided with the package.
22 : *
23 : * Redistribution and use in source and binary forms, with or without
24 : * modification, are permitted provided that the following conditions
25 : * are met:
26 : * 1. Redistributions of source code must retain the copyright
27 : * notice, this list of conditions and the following disclaimer.
28 : * 2. Redistributions in binary form must reproduce the above copyright
29 : * notice, this list of conditions and the following disclaimer in the
30 : * documentation and/or other materials provided with the distribution.
31 : * 3. All advertising materials mentioning features or use of this software
32 : * must display the following acknowledgement:
33 : * "This product includes cryptographic software written by
34 : * Eric Young (eay@cryptsoft.com)"
35 : * The word 'cryptographic' can be left out if the rouines from the library
36 : * being used are not cryptographic related :-).
37 : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : * the apps directory (application code) you must include an acknowledgement:
39 : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : *
41 : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : * SUCH DAMAGE.
52 : *
53 : * The licence and distribution terms for any publically available version or
54 : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : * copied and put under another distribution licence
56 : * [including the GNU Public Licence.]
57 : */
58 :
59 : #include <stdio.h>
60 : #include <errno.h>
61 : #define USE_SOCKETS
62 : #include "cryptlib.h"
63 :
64 : #ifndef OPENSSL_NO_SOCK
65 :
66 : # include <openssl/bio.h>
67 :
68 : # ifdef WATT32
69 : # define sock_write SockWrite /* Watt-32 uses same names */
70 : # define sock_read SockRead
71 : # define sock_puts SockPuts
72 : # endif
73 :
74 : static int sock_write(BIO *h, const char *buf, int num);
75 : static int sock_read(BIO *h, char *buf, int size);
76 : static int sock_puts(BIO *h, const char *str);
77 : static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
78 : static int sock_new(BIO *h);
79 : static int sock_free(BIO *data);
80 : int BIO_sock_should_retry(int s);
81 :
82 : static BIO_METHOD methods_sockp = {
83 : BIO_TYPE_SOCKET,
84 : "socket",
85 : sock_write,
86 : sock_read,
87 : sock_puts,
88 : NULL, /* sock_gets, */
89 : sock_ctrl,
90 : sock_new,
91 : sock_free,
92 : NULL,
93 : };
94 :
95 0 : BIO_METHOD *BIO_s_socket(void)
96 : {
97 0 : return (&methods_sockp);
98 : }
99 :
100 0 : BIO *BIO_new_socket(int fd, int close_flag)
101 : {
102 : BIO *ret;
103 :
104 0 : ret = BIO_new(BIO_s_socket());
105 0 : if (ret == NULL)
106 : return (NULL);
107 0 : BIO_set_fd(ret, fd, close_flag);
108 0 : return (ret);
109 : }
110 :
111 0 : static int sock_new(BIO *bi)
112 : {
113 0 : bi->init = 0;
114 0 : bi->num = 0;
115 0 : bi->ptr = NULL;
116 0 : bi->flags = 0;
117 0 : return (1);
118 : }
119 :
120 0 : static int sock_free(BIO *a)
121 : {
122 0 : if (a == NULL)
123 : return (0);
124 0 : if (a->shutdown) {
125 0 : if (a->init) {
126 0 : SHUTDOWN2(a->num);
127 : }
128 0 : a->init = 0;
129 0 : a->flags = 0;
130 : }
131 : return (1);
132 : }
133 :
134 0 : static int sock_read(BIO *b, char *out, int outl)
135 : {
136 : int ret = 0;
137 :
138 0 : if (out != NULL) {
139 0 : clear_socket_error();
140 0 : ret = readsocket(b->num, out, outl);
141 0 : BIO_clear_retry_flags(b);
142 0 : if (ret <= 0) {
143 0 : if (BIO_sock_should_retry(ret))
144 0 : BIO_set_retry_read(b);
145 : }
146 : }
147 0 : return (ret);
148 : }
149 :
150 0 : static int sock_write(BIO *b, const char *in, int inl)
151 : {
152 : int ret;
153 :
154 0 : clear_socket_error();
155 0 : ret = writesocket(b->num, in, inl);
156 0 : BIO_clear_retry_flags(b);
157 0 : if (ret <= 0) {
158 0 : if (BIO_sock_should_retry(ret))
159 0 : BIO_set_retry_write(b);
160 : }
161 0 : return (ret);
162 : }
163 :
164 0 : static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
165 : {
166 : long ret = 1;
167 : int *ip;
168 :
169 0 : switch (cmd) {
170 : case BIO_C_SET_FD:
171 0 : sock_free(b);
172 0 : b->num = *((int *)ptr);
173 0 : b->shutdown = (int)num;
174 0 : b->init = 1;
175 0 : break;
176 : case BIO_C_GET_FD:
177 0 : if (b->init) {
178 : ip = (int *)ptr;
179 0 : if (ip != NULL)
180 0 : *ip = b->num;
181 0 : ret = b->num;
182 : } else
183 : ret = -1;
184 : break;
185 : case BIO_CTRL_GET_CLOSE:
186 0 : ret = b->shutdown;
187 0 : break;
188 : case BIO_CTRL_SET_CLOSE:
189 0 : b->shutdown = (int)num;
190 0 : break;
191 : case BIO_CTRL_DUP:
192 : case BIO_CTRL_FLUSH:
193 : ret = 1;
194 : break;
195 : default:
196 : ret = 0;
197 0 : break;
198 : }
199 0 : return (ret);
200 : }
201 :
202 0 : static int sock_puts(BIO *bp, const char *str)
203 : {
204 : int n, ret;
205 :
206 0 : n = strlen(str);
207 0 : ret = sock_write(bp, str, n);
208 0 : return (ret);
209 : }
210 :
211 0 : int BIO_sock_should_retry(int i)
212 : {
213 : int err;
214 :
215 0 : if ((i == 0) || (i == -1)) {
216 0 : err = get_last_socket_error();
217 :
218 : # if defined(OPENSSL_SYS_WINDOWS) && 0/* more microsoft stupidity? perhaps
219 : * not? Ben 4/1/99 */
220 : if ((i == -1) && (err == 0))
221 : return (1);
222 : # endif
223 :
224 0 : return (BIO_sock_non_fatal_error(err));
225 : }
226 : return (0);
227 : }
228 :
229 0 : int BIO_sock_non_fatal_error(int err)
230 : {
231 0 : switch (err) {
232 : # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
233 : # if defined(WSAEWOULDBLOCK)
234 : case WSAEWOULDBLOCK:
235 : # endif
236 :
237 : # if 0 /* This appears to always be an error */
238 : # if defined(WSAENOTCONN)
239 : case WSAENOTCONN:
240 : # endif
241 : # endif
242 : # endif
243 :
244 : # ifdef EWOULDBLOCK
245 : # ifdef WSAEWOULDBLOCK
246 : # if WSAEWOULDBLOCK != EWOULDBLOCK
247 : case EWOULDBLOCK:
248 : # endif
249 : # else
250 : case EWOULDBLOCK:
251 : # endif
252 : # endif
253 :
254 : # if defined(ENOTCONN)
255 : case ENOTCONN:
256 : # endif
257 :
258 : # ifdef EINTR
259 : case EINTR:
260 : # endif
261 :
262 : # ifdef EAGAIN
263 : # if EWOULDBLOCK != EAGAIN
264 : case EAGAIN:
265 : # endif
266 : # endif
267 :
268 : # ifdef EPROTO
269 : case EPROTO:
270 : # endif
271 :
272 : # ifdef EINPROGRESS
273 : case EINPROGRESS:
274 : # endif
275 :
276 : # ifdef EALREADY
277 : case EALREADY:
278 : # endif
279 : return (1);
280 : /* break; */
281 : default:
282 : break;
283 : }
284 0 : return (0);
285 : }
286 :
287 : #endif /* #ifndef OPENSSL_NO_SOCK */
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