]>
Commit | Line | Data |
---|---|---|
b1322259 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 3 | * |
b1322259 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
664d83bb DSH |
10 | #include <stdio.h> |
11 | #include <errno.h> | |
a5cc75d6 RL |
12 | |
13 | #include "bio_lcl.h" | |
1715e488 AP |
14 | |
15 | #if defined(OPENSSL_NO_POSIX_IO) | |
16 | /* | |
a006fef7 | 17 | * Dummy placeholder for BIO_s_fd... |
1715e488 | 18 | */ |
0f113f3e MC |
19 | BIO *BIO_new_fd(int fd, int close_flag) |
20 | { | |
21 | return NULL; | |
22 | } | |
23 | ||
a006fef7 | 24 | int BIO_fd_non_fatal_error(int err) |
0f113f3e MC |
25 | { |
26 | return 0; | |
27 | } | |
28 | ||
a006fef7 | 29 | int BIO_fd_should_retry(int i) |
0f113f3e MC |
30 | { |
31 | return 0; | |
32 | } | |
a006fef7 | 33 | |
04f6b0fd | 34 | const BIO_METHOD *BIO_s_fd(void) |
0f113f3e MC |
35 | { |
36 | return NULL; | |
37 | } | |
1715e488 | 38 | #else |
ea1b02db AP |
39 | /* |
40 | * As for unconditional usage of "UPLINK" interface in this module. | |
41 | * Trouble is that unlike Unix file descriptors [which are indexes | |
42 | * in kernel-side per-process table], corresponding descriptors on | |
43 | * platforms which require "UPLINK" interface seem to be indexes | |
44 | * in a user-land, non-global table. Well, in fact they are indexes | |
45 | * in stdio _iob[], and recall that _iob[] was the very reason why | |
46 | * "UPLINK" interface was introduced in first place. But one way on | |
47 | * another. Neither libcrypto or libssl use this BIO meaning that | |
48 | * file descriptors can only be provided by application. Therefore | |
49 | * "UPLINK" calls are due... | |
50 | */ | |
664d83bb DSH |
51 | static int fd_write(BIO *h, const char *buf, int num); |
52 | static int fd_read(BIO *h, char *buf, int size); | |
53 | static int fd_puts(BIO *h, const char *str); | |
c7235be6 | 54 | static int fd_gets(BIO *h, char *buf, int size); |
664d83bb DSH |
55 | static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
56 | static int fd_new(BIO *h); | |
57 | static int fd_free(BIO *data); | |
58 | int BIO_fd_should_retry(int s); | |
59 | ||
04f6b0fd | 60 | static const BIO_METHOD methods_fdp = { |
0f113f3e MC |
61 | BIO_TYPE_FD, "file descriptor", |
62 | fd_write, | |
d07aee2c MC |
63 | /* TODO: Convert to new style read function */ |
64 | bread_conv, | |
0f113f3e MC |
65 | fd_read, |
66 | fd_puts, | |
67 | fd_gets, | |
68 | fd_ctrl, | |
69 | fd_new, | |
70 | fd_free, | |
71 | NULL, | |
72 | }; | |
664d83bb | 73 | |
04f6b0fd | 74 | const BIO_METHOD *BIO_s_fd(void) |
0f113f3e MC |
75 | { |
76 | return (&methods_fdp); | |
77 | } | |
78 | ||
79 | BIO *BIO_new_fd(int fd, int close_flag) | |
80 | { | |
81 | BIO *ret; | |
82 | ret = BIO_new(BIO_s_fd()); | |
83 | if (ret == NULL) | |
84 | return (NULL); | |
85 | BIO_set_fd(ret, fd, close_flag); | |
86 | return (ret); | |
87 | } | |
664d83bb DSH |
88 | |
89 | static int fd_new(BIO *bi) | |
0f113f3e MC |
90 | { |
91 | bi->init = 0; | |
92 | bi->num = -1; | |
93 | bi->ptr = NULL; | |
94 | bi->flags = BIO_FLAGS_UPLINK; /* essentially redundant */ | |
95 | return (1); | |
96 | } | |
664d83bb DSH |
97 | |
98 | static int fd_free(BIO *a) | |
0f113f3e MC |
99 | { |
100 | if (a == NULL) | |
101 | return (0); | |
102 | if (a->shutdown) { | |
103 | if (a->init) { | |
104 | UP_close(a->num); | |
105 | } | |
106 | a->init = 0; | |
107 | a->flags = BIO_FLAGS_UPLINK; | |
108 | } | |
109 | return (1); | |
110 | } | |
111 | ||
112 | static int fd_read(BIO *b, char *out, int outl) | |
113 | { | |
114 | int ret = 0; | |
115 | ||
116 | if (out != NULL) { | |
117 | clear_sys_error(); | |
118 | ret = UP_read(b->num, out, outl); | |
119 | BIO_clear_retry_flags(b); | |
120 | if (ret <= 0) { | |
121 | if (BIO_fd_should_retry(ret)) | |
122 | BIO_set_retry_read(b); | |
123 | } | |
124 | } | |
125 | return (ret); | |
126 | } | |
664d83bb DSH |
127 | |
128 | static int fd_write(BIO *b, const char *in, int inl) | |
0f113f3e MC |
129 | { |
130 | int ret; | |
131 | clear_sys_error(); | |
132 | ret = UP_write(b->num, in, inl); | |
133 | BIO_clear_retry_flags(b); | |
134 | if (ret <= 0) { | |
135 | if (BIO_fd_should_retry(ret)) | |
136 | BIO_set_retry_write(b); | |
137 | } | |
138 | return (ret); | |
139 | } | |
664d83bb DSH |
140 | |
141 | static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) | |
0f113f3e MC |
142 | { |
143 | long ret = 1; | |
144 | int *ip; | |
145 | ||
146 | switch (cmd) { | |
147 | case BIO_CTRL_RESET: | |
148 | num = 0; | |
149 | case BIO_C_FILE_SEEK: | |
150 | ret = (long)UP_lseek(b->num, num, 0); | |
151 | break; | |
152 | case BIO_C_FILE_TELL: | |
153 | case BIO_CTRL_INFO: | |
154 | ret = (long)UP_lseek(b->num, 0, 1); | |
155 | break; | |
156 | case BIO_C_SET_FD: | |
157 | fd_free(b); | |
158 | b->num = *((int *)ptr); | |
159 | b->shutdown = (int)num; | |
160 | b->init = 1; | |
161 | break; | |
162 | case BIO_C_GET_FD: | |
163 | if (b->init) { | |
164 | ip = (int *)ptr; | |
165 | if (ip != NULL) | |
166 | *ip = b->num; | |
167 | ret = b->num; | |
168 | } else | |
169 | ret = -1; | |
170 | break; | |
171 | case BIO_CTRL_GET_CLOSE: | |
172 | ret = b->shutdown; | |
173 | break; | |
174 | case BIO_CTRL_SET_CLOSE: | |
175 | b->shutdown = (int)num; | |
176 | break; | |
177 | case BIO_CTRL_PENDING: | |
178 | case BIO_CTRL_WPENDING: | |
179 | ret = 0; | |
180 | break; | |
181 | case BIO_CTRL_DUP: | |
182 | case BIO_CTRL_FLUSH: | |
183 | ret = 1; | |
184 | break; | |
185 | default: | |
186 | ret = 0; | |
187 | break; | |
188 | } | |
189 | return (ret); | |
190 | } | |
664d83bb DSH |
191 | |
192 | static int fd_puts(BIO *bp, const char *str) | |
0f113f3e MC |
193 | { |
194 | int n, ret; | |
664d83bb | 195 | |
0f113f3e MC |
196 | n = strlen(str); |
197 | ret = fd_write(bp, str, n); | |
198 | return (ret); | |
199 | } | |
664d83bb | 200 | |
c7235be6 | 201 | static int fd_gets(BIO *bp, char *buf, int size) |
0f113f3e MC |
202 | { |
203 | int ret = 0; | |
204 | char *ptr = buf; | |
205 | char *end = buf + size - 1; | |
c7235be6 | 206 | |
0f113f3e MC |
207 | while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n')) |
208 | ptr++; | |
c7235be6 | 209 | |
0f113f3e | 210 | ptr[0] = '\0'; |
c7235be6 | 211 | |
0f113f3e MC |
212 | if (buf[0] != '\0') |
213 | ret = strlen(buf); | |
214 | return (ret); | |
215 | } | |
c7235be6 | 216 | |
664d83bb | 217 | int BIO_fd_should_retry(int i) |
0f113f3e MC |
218 | { |
219 | int err; | |
664d83bb | 220 | |
0f113f3e MC |
221 | if ((i == 0) || (i == -1)) { |
222 | err = get_last_sys_error(); | |
664d83bb | 223 | |
0f113f3e MC |
224 | return (BIO_fd_non_fatal_error(err)); |
225 | } | |
226 | return (0); | |
227 | } | |
664d83bb DSH |
228 | |
229 | int BIO_fd_non_fatal_error(int err) | |
0f113f3e MC |
230 | { |
231 | switch (err) { | |
232 | ||
233 | # ifdef EWOULDBLOCK | |
234 | # ifdef WSAEWOULDBLOCK | |
235 | # if WSAEWOULDBLOCK != EWOULDBLOCK | |
236 | case EWOULDBLOCK: | |
237 | # endif | |
238 | # else | |
239 | case EWOULDBLOCK: | |
664d83bb | 240 | # endif |
664d83bb | 241 | # endif |
664d83bb | 242 | |
0f113f3e MC |
243 | # if defined(ENOTCONN) |
244 | case ENOTCONN: | |
245 | # endif | |
664d83bb | 246 | |
0f113f3e MC |
247 | # ifdef EINTR |
248 | case EINTR: | |
249 | # endif | |
664d83bb | 250 | |
0f113f3e MC |
251 | # ifdef EAGAIN |
252 | # if EWOULDBLOCK != EAGAIN | |
253 | case EAGAIN: | |
254 | # endif | |
664d83bb | 255 | # endif |
664d83bb | 256 | |
0f113f3e MC |
257 | # ifdef EPROTO |
258 | case EPROTO: | |
259 | # endif | |
664d83bb | 260 | |
0f113f3e MC |
261 | # ifdef EINPROGRESS |
262 | case EINPROGRESS: | |
263 | # endif | |
664d83bb | 264 | |
0f113f3e MC |
265 | # ifdef EALREADY |
266 | case EALREADY: | |
267 | # endif | |
268 | return (1); | |
269 | /* break; */ | |
270 | default: | |
271 | break; | |
272 | } | |
273 | return (0); | |
274 | } | |
eff7cb41 | 275 | #endif |