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 {
84 BIO_TYPE_SOCKET,
85 "socket",
86 sock_write,
87 sock_read,
88 sock_puts,
89 NULL, /* sock_gets, */
90 sock_ctrl,
91 sock_new,
92 sock_free,
93 NULL,
94 };
95
96 BIO_METHOD *BIO_s_socket(void)
97 {
98 return(&methods_sockp);
99 }
100
101 BIO *BIO_new_socket(int fd, int close_flag)
102 {
103 BIO *ret;
104
105 ret=BIO_new(BIO_s_socket());
106 if (ret == NULL) return(NULL);
107 BIO_set_fd(ret,fd,close_flag);
108 return(ret);
109 }
110
111 static int sock_new(BIO *bi)
112 {
113 bi->init=0;
114 bi->num=0;
115 bi->ptr=NULL;
116 bi->flags=0;
117 return(1);
118 }
119
120 static int sock_free(BIO *a)
121 {
122 if (a == NULL) return(0);
123 if (a->shutdown)
124 {
125 if (a->init)
126 {
127 SHUTDOWN2(a->num);
128 }
129 a->init=0;
130 a->flags=0;
131 }
132 return(1);
133 }
134
135 static int sock_read(BIO *b, char *out, int outl)
136 {
137 int ret=0;
138
139 if (out != NULL)
140 {
141 clear_socket_error();
142 ret=readsocket(b->num,out,outl);
143 BIO_clear_retry_flags(b);
144 if (ret <= 0)
145 {
146 if (BIO_sock_should_retry(ret))
147 BIO_set_retry_read(b);
148 }
149 }
150 return(ret);
151 }
152
153 static int sock_write(BIO *b, const char *in, int inl)
154 {
155 int ret;
156
157 clear_socket_error();
158 ret=writesocket(b->num,in,inl);
159 BIO_clear_retry_flags(b);
160 if (ret <= 0)
161 {
162 if (BIO_sock_should_retry(ret))
163 BIO_set_retry_write(b);
164 }
165 return(ret);
166 }
167
168 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
169 {
170 long ret=1;
171 int *ip;
172
173 switch (cmd)
174 {
175 case BIO_C_SET_FD:
176 sock_free(b);
177 b->num= *((int *)ptr);
178 b->shutdown=(int)num;
179 b->init=1;
180 break;
181 case BIO_C_GET_FD:
182 if (b->init)
183 {
184 ip=(int *)ptr;
185 if (ip != NULL) *ip=b->num;
186 ret=b->num;
187 }
188 else
189 ret= -1;
190 break;
191 case BIO_CTRL_GET_CLOSE:
192 ret=b->shutdown;
193 break;
194 case BIO_CTRL_SET_CLOSE:
195 b->shutdown=(int)num;
196 break;
197 case BIO_CTRL_DUP:
198 case BIO_CTRL_FLUSH:
199 ret=1;
200 break;
201 default:
202 ret=0;
203 break;
204 }
205 return(ret);
206 }
207
208 static int sock_puts(BIO *bp, const char *str)
209 {
210 int n,ret;
211
212 n=strlen(str);
213 ret=sock_write(bp,str,n);
214 return(ret);
215 }
216
217 int BIO_sock_should_retry(int i)
218 {
219 int err;
220
221 if ((i == 0) || (i == -1))
222 {
223 err=get_last_socket_error();
224
225 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
226 if ((i == -1) && (err == 0))
227 return(1);
228 #endif
229
230 return(BIO_sock_non_fatal_error(err));
231 }
232 return(0);
233 }
234
235 int BIO_sock_non_fatal_error(int err)
236 {
237 switch (err)
238 {
239 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
240 # if defined(WSAEWOULDBLOCK)
241 case WSAEWOULDBLOCK:
242 # endif
243
244 # if 0 /* This appears to always be an error */
245 # if defined(WSAENOTCONN)
246 case WSAENOTCONN:
247 # endif
248 # endif
249 #endif
250
251 #ifdef EWOULDBLOCK
252 # ifdef WSAEWOULDBLOCK
253 # if WSAEWOULDBLOCK != EWOULDBLOCK
254 case EWOULDBLOCK:
255 # endif
256 # else
257 case EWOULDBLOCK:
258 # endif
259 #endif
260
261 #if defined(ENOTCONN)
262 case ENOTCONN:
263 #endif
264
265 #ifdef EINTR
266 case EINTR:
267 #endif
268
269 #ifdef EAGAIN
270 # if EWOULDBLOCK != EAGAIN
271 case EAGAIN:
272 # endif
273 #endif
274
275 #ifdef EPROTO
276 case EPROTO:
277 #endif
278
279 #ifdef EINPROGRESS
280 case EINPROGRESS:
281 #endif
282
283 #ifdef EALREADY
284 case EALREADY:
285 #endif
286 return(1);
287 /* break; */
288 default:
289 break;
290 }
291 return(0);
292 }
293
294 #endif /* #ifndef OPENSSL_NO_SOCK */