1 /* $OpenBSD: bss_sock.c,v 1.25 2022/01/07 09:02:17 tb Exp $ */
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 <sys/socket.h>
60
61 #include <errno.h>
62 #include <stdio.h>
63 #include <string.h>
64 #include <unistd.h>
65
66 #include <openssl/bio.h>
67
68 #include "bio_local.h"
69
70 static int sock_write(BIO *h, const char *buf, int num);
71 static int sock_read(BIO *h, char *buf, int size);
72 static int sock_puts(BIO *h, const char *str);
73 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
74 static int sock_new(BIO *h);
75 static int sock_free(BIO *data);
76 int BIO_sock_should_retry(int s);
77
78 static const BIO_METHOD methods_sockp = {
79 .type = BIO_TYPE_SOCKET,
80 .name = "socket",
81 .bwrite = sock_write,
82 .bread = sock_read,
83 .bputs = sock_puts,
84 .ctrl = sock_ctrl,
85 .create = sock_new,
86 .destroy = sock_free
87 };
88
89 const BIO_METHOD *
BIO_s_socket(void)90 BIO_s_socket(void)
91 {
92 return (&methods_sockp);
93 }
94
95 BIO *
BIO_new_socket(int fd,int close_flag)96 BIO_new_socket(int fd, int close_flag)
97 {
98 BIO *ret;
99
100 ret = BIO_new(BIO_s_socket());
101 if (ret == NULL)
102 return (NULL);
103 BIO_set_fd(ret, fd, close_flag);
104 return (ret);
105 }
106
107 static int
sock_new(BIO * bi)108 sock_new(BIO *bi)
109 {
110 bi->init = 0;
111 bi->num = 0;
112 bi->ptr = NULL;
113 bi->flags = 0;
114 return (1);
115 }
116
117 static int
sock_free(BIO * a)118 sock_free(BIO *a)
119 {
120 if (a == NULL)
121 return (0);
122 if (a->shutdown) {
123 if (a->init) {
124 shutdown(a->num, SHUT_RDWR);
125 close(a->num);
126 }
127 a->init = 0;
128 a->flags = 0;
129 }
130 return (1);
131 }
132
133 static int
sock_read(BIO * b,char * out,int outl)134 sock_read(BIO *b, char *out, int outl)
135 {
136 int ret = 0;
137
138 if (out != NULL) {
139 errno = 0;
140 ret = read(b->num, out, outl);
141 BIO_clear_retry_flags(b);
142 if (ret <= 0) {
143 if (BIO_sock_should_retry(ret))
144 BIO_set_retry_read(b);
145 }
146 }
147 return (ret);
148 }
149
150 static int
sock_write(BIO * b,const char * in,int inl)151 sock_write(BIO *b, const char *in, int inl)
152 {
153 int ret;
154
155 errno = 0;
156 ret = write(b->num, in, inl);
157 BIO_clear_retry_flags(b);
158 if (ret <= 0) {
159 if (BIO_sock_should_retry(ret))
160 BIO_set_retry_write(b);
161 }
162 return (ret);
163 }
164
165 static long
sock_ctrl(BIO * b,int cmd,long num,void * ptr)166 sock_ctrl(BIO *b, int cmd, long num, void *ptr)
167 {
168 long ret = 1;
169 int *ip;
170
171 switch (cmd) {
172 case BIO_C_SET_FD:
173 sock_free(b);
174 b->num= *((int *)ptr);
175 b->shutdown = (int)num;
176 b->init = 1;
177 break;
178 case BIO_C_GET_FD:
179 if (b->init) {
180 ip = (int *)ptr;
181 if (ip != NULL)
182 *ip = b->num;
183 ret = b->num;
184 } else
185 ret = -1;
186 break;
187 case BIO_CTRL_GET_CLOSE:
188 ret = b->shutdown;
189 break;
190 case BIO_CTRL_SET_CLOSE:
191 b->shutdown = (int)num;
192 break;
193 case BIO_CTRL_DUP:
194 case BIO_CTRL_FLUSH:
195 ret = 1;
196 break;
197 default:
198 ret = 0;
199 break;
200 }
201 return (ret);
202 }
203
204 static int
sock_puts(BIO * bp,const char * str)205 sock_puts(BIO *bp, const char *str)
206 {
207 int n, ret;
208
209 n = strlen(str);
210 ret = sock_write(bp, str, n);
211 return (ret);
212 }
213
214 int
BIO_sock_should_retry(int i)215 BIO_sock_should_retry(int i)
216 {
217 int err;
218
219 if ((i == 0) || (i == -1)) {
220 err = errno;
221 return (BIO_sock_non_fatal_error(err));
222 }
223 return (0);
224 }
225
226 int
BIO_sock_non_fatal_error(int err)227 BIO_sock_non_fatal_error(int err)
228 {
229 switch (err) {
230 case ENOTCONN:
231 case EINTR:
232 case EAGAIN:
233 case EINPROGRESS:
234 case EALREADY:
235 return (1);
236 default:
237 break;
238 }
239 return (0);
240 }
241
242