• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
BIO_s_socket(void)96 BIO_METHOD *BIO_s_socket(void)
97 	{
98 	return(&methods_sockp);
99 	}
100 
BIO_new_socket(int fd,int close_flag)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 
sock_new(BIO * bi)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 
sock_free(BIO * a)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 
sock_read(BIO * b,char * out,int outl)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 
sock_write(BIO * b,const char * in,int inl)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 
sock_ctrl(BIO * b,int cmd,long num,void * ptr)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 
sock_puts(BIO * bp,const char * str)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 
BIO_sock_should_retry(int i)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 
BIO_sock_non_fatal_error(int err)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 */
295