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bss_fd.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/bio/bss_fd.c
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1/*-
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
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-
8 */-
9-
10#include <stdio.h>-
11#include <errno.h>-
12-
13#include "bio_lcl.h"-
14-
15#if defined(OPENSSL_NO_POSIX_IO)-
16/*-
17 * Dummy placeholder for BIO_s_fd...-
18 */-
19BIO *BIO_new_fd(int fd, int close_flag)-
20{-
21 return NULL;-
22}-
23-
24int BIO_fd_non_fatal_error(int err)-
25{-
26 return 0;-
27}-
28-
29int BIO_fd_should_retry(int i)-
30{-
31 return 0;-
32}-
33-
34const BIO_METHOD *BIO_s_fd(void)-
35{-
36 return NULL;-
37}-
38#else-
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 */-
51static int fd_write(BIO *h, const char *buf, int num);-
52static int fd_read(BIO *h, char *buf, int size);-
53static int fd_puts(BIO *h, const char *str);-
54static int fd_gets(BIO *h, char *buf, int size);-
55static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);-
56static int fd_new(BIO *h);-
57static int fd_free(BIO *data);-
58int BIO_fd_should_retry(int s);-
59-
60static const BIO_METHOD methods_fdp = {-
61 BIO_TYPE_FD,-
62 "file descriptor",-
63 /* TODO: Convert to new style write function */-
64 bwrite_conv,-
65 fd_write,-
66 /* TODO: Convert to new style read function */-
67 bread_conv,-
68 fd_read,-
69 fd_puts,-
70 fd_gets,-
71 fd_ctrl,-
72 fd_new,-
73 fd_free,-
74 NULL, /* fd_callback_ctrl */-
75};-
76-
77const BIO_METHOD *BIO_s_fd(void)-
78{-
79 return &methods_fdp;
never executed: return &methods_fdp;
0
80}-
81-
82BIO *BIO_new_fd(int fd, int close_flag)-
83{-
84 BIO *ret;-
85 ret = BIO_new(BIO_s_fd());-
86 if (ret == NULL)
ret == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
87 return NULL;
never executed: return ((void *)0) ;
0
88 BIO_set_fd(ret, fd, close_flag);-
89 return ret;
never executed: return ret;
0
90}-
91-
92static int fd_new(BIO *bi)-
93{-
94 bi->init = 0;-
95 bi->num = -1;-
96 bi->ptr = NULL;-
97 bi->flags = BIO_FLAGS_UPLINK; /* essentially redundant */-
98 return 1;
never executed: return 1;
0
99}-
100-
101static int fd_free(BIO *a)-
102{-
103 if (a == NULL)
a == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
104 return 0;
never executed: return 0;
0
105 if (a->shutdown) {
a->shutdownDescription
TRUEnever evaluated
FALSEnever evaluated
0
106 if (a->init) {
a->initDescription
TRUEnever evaluated
FALSEnever evaluated
0
107 UP_close(a->num);-
108 }
never executed: end of block
0
109 a->init = 0;-
110 a->flags = BIO_FLAGS_UPLINK;-
111 }
never executed: end of block
0
112 return 1;
never executed: return 1;
0
113}-
114-
115static int fd_read(BIO *b, char *out, int outl)-
116{-
117 int ret = 0;-
118-
119 if (out != NULL) {
out != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
120 clear_sys_error();-
121 ret = UP_read(b->num, out, outl);-
122 BIO_clear_retry_flags(b);-
123 if (ret <= 0) {
ret <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
124 if (BIO_fd_should_retry(ret))
BIO_fd_should_retry(ret)Description
TRUEnever evaluated
FALSEnever evaluated
0
125 BIO_set_retry_read(b);
never executed: BIO_set_flags(b, (0x01|0x08));
0
126 }
never executed: end of block
0
127 }
never executed: end of block
0
128 return ret;
never executed: return ret;
0
129}-
130-
131static int fd_write(BIO *b, const char *in, int inl)-
132{-
133 int ret;-
134 clear_sys_error();-
135 ret = UP_write(b->num, in, inl);-
136 BIO_clear_retry_flags(b);-
137 if (ret <= 0) {
ret <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
138 if (BIO_fd_should_retry(ret))
BIO_fd_should_retry(ret)Description
TRUEnever evaluated
FALSEnever evaluated
0
139 BIO_set_retry_write(b);
never executed: BIO_set_flags(b, (0x02|0x08));
0
140 }
never executed: end of block
0
141 return ret;
never executed: return ret;
0
142}-
143-
144static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)-
145{-
146 long ret = 1;-
147 int *ip;-
148-
149 switch (cmd) {-
150 case BIO_CTRL_RESET:
never executed: case 1:
0
151 num = 0;-
152 /* fall thru */-
153 case BIO_C_FILE_SEEK:
code before this statement never executed: case 128:
never executed: case 128:
0
154 ret = (long)UP_lseek(b->num, num, 0);-
155 break;
never executed: break;
0
156 case BIO_C_FILE_TELL:
never executed: case 133:
0
157 case BIO_CTRL_INFO:
never executed: case 3:
0
158 ret = (long)UP_lseek(b->num, 0, 1);-
159 break;
never executed: break;
0
160 case BIO_C_SET_FD:
never executed: case 104:
0
161 fd_free(b);-
162 b->num = *((int *)ptr);-
163 b->shutdown = (int)num;-
164 b->init = 1;-
165 break;
never executed: break;
0
166 case BIO_C_GET_FD:
never executed: case 105:
0
167 if (b->init) {
b->initDescription
TRUEnever evaluated
FALSEnever evaluated
0
168 ip = (int *)ptr;-
169 if (ip != NULL)
ip != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
170 *ip = b->num;
never executed: *ip = b->num;
0
171 ret = b->num;-
172 } else
never executed: end of block
0
173 ret = -1;
never executed: ret = -1;
0
174 break;
never executed: break;
0
175 case BIO_CTRL_GET_CLOSE:
never executed: case 8:
0
176 ret = b->shutdown;-
177 break;
never executed: break;
0
178 case BIO_CTRL_SET_CLOSE:
never executed: case 9:
0
179 b->shutdown = (int)num;-
180 break;
never executed: break;
0
181 case BIO_CTRL_PENDING:
never executed: case 10:
0
182 case BIO_CTRL_WPENDING:
never executed: case 13:
0
183 ret = 0;-
184 break;
never executed: break;
0
185 case BIO_CTRL_DUP:
never executed: case 12:
0
186 case BIO_CTRL_FLUSH:
never executed: case 11:
0
187 ret = 1;-
188 break;
never executed: break;
0
189 default:
never executed: default:
0
190 ret = 0;-
191 break;
never executed: break;
0
192 }-
193 return ret;
never executed: return ret;
0
194}-
195-
196static int fd_puts(BIO *bp, const char *str)-
197{-
198 int n, ret;-
199-
200 n = strlen(str);-
201 ret = fd_write(bp, str, n);-
202 return ret;
never executed: return ret;
0
203}-
204-
205static int fd_gets(BIO *bp, char *buf, int size)-
206{-
207 int ret = 0;-
208 char *ptr = buf;-
209 char *end = buf + size - 1;-
210-
211 while (ptr < end && fd_read(bp, ptr, 1) > 0) {
ptr < endDescription
TRUEnever evaluated
FALSEnever evaluated
fd_read(bp, ptr, 1) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
212 if (*ptr++ == '\n')
*ptr++ == '\n'Description
TRUEnever evaluated
FALSEnever evaluated
0
213 break;
never executed: break;
0
214 }
never executed: end of block
0
215-
216 ptr[0] = '\0';-
217-
218 if (buf[0] != '\0')
buf[0] != '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
219 ret = strlen(buf);
never executed: ret = strlen(buf);
0
220 return ret;
never executed: return ret;
0
221}-
222-
223int BIO_fd_should_retry(int i)-
224{-
225 int err;-
226-
227 if ((i == 0) || (i == -1)) {
(i == 0)Description
TRUEnever evaluated
FALSEnever evaluated
(i == -1)Description
TRUEnever evaluated
FALSEnever evaluated
0
228 err = get_last_sys_error();-
229-
230 return BIO_fd_non_fatal_error(err);
never executed: return BIO_fd_non_fatal_error(err);
0
231 }-
232 return 0;
never executed: return 0;
0
233}-
234-
235int BIO_fd_non_fatal_error(int err)-
236{-
237 switch (err) {-
238-
239# ifdef EWOULDBLOCK-
240# ifdef WSAEWOULDBLOCK-
241# if WSAEWOULDBLOCK != EWOULDBLOCK-
242 case EWOULDBLOCK:-
243# endif-
244# else-
245 case EWOULDBLOCK:
never executed: case 11 :
0
246# endif-
247# endif-
248-
249# if defined(ENOTCONN)-
250 case ENOTCONN:
never executed: case 107 :
0
251# endif-
252-
253# ifdef EINTR-
254 case EINTR:
never executed: case 4 :
0
255# endif-
256-
257# ifdef EAGAIN-
258# if EWOULDBLOCK != EAGAIN-
259 case EAGAIN:-
260# endif-
261# endif-
262-
263# ifdef EPROTO-
264 case EPROTO:
never executed: case 71 :
0
265# endif-
266-
267# ifdef EINPROGRESS-
268 case EINPROGRESS:
never executed: case 115 :
0
269# endif-
270-
271# ifdef EALREADY-
272 case EALREADY:
never executed: case 114 :
0
273# endif-
274 return 1;
never executed: return 1;
0
275 default:
never executed: default:
0
276 break;
never executed: break;
0
277 }-
278 return 0;
never executed: return 0;
0
279}-
280#endif-
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