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1 /* crypto/bio/bss_fd.c */ |
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2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 * All rights reserved. |
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4 * |
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5 * This package is an SSL implementation written |
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6 * by Eric Young (eay@cryptsoft.com). |
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7 * The implementation was written so as to conform with Netscapes SSL. |
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8 * |
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9 * This library is free for commercial and non-commercial use as long as |
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10 * the following conditions are aheared to. The following conditions |
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11 * apply to all code found in this distribution, be it the RC4, RSA, |
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12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 * included with this distribution is covered by the same copyright terms |
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14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 * |
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16 * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 * the code are not to be removed. |
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18 * If this package is used in a product, Eric Young should be given attribution |
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19 * as the author of the parts of the library used. |
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20 * This can be in the form of a textual message at program startup or |
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21 * in documentation (online or textual) provided with the package. |
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22 * |
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23 * Redistribution and use in source and binary forms, with or without |
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24 * modification, are permitted provided that the following conditions |
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25 * are met: |
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26 * 1. Redistributions of source code must retain the copyright |
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27 * notice, this list of conditions and the following disclaimer. |
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28 * 2. Redistributions in binary form must reproduce the above copyright |
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29 * notice, this list of conditions and the following disclaimer in the |
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30 * documentation and/or other materials provided with the distribution. |
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31 * 3. All advertising materials mentioning features or use of this software |
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32 * must display the following acknowledgement: |
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33 * "This product includes cryptographic software written by |
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34 * Eric Young (eay@cryptsoft.com)" |
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35 * The word 'cryptographic' can be left out if the rouines from the library |
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36 * being used are not cryptographic related :-). |
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37 * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 * the apps directory (application code) you must include an acknowledgement: |
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39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 * SUCH DAMAGE. |
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52 * |
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53 * The licence and distribution terms for any publically available version or |
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54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 * copied and put under another distribution licence |
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56 * [including the GNU Public Licence.] |
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57 */ |
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58 |
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59 #include <stdio.h> |
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60 #include <errno.h> |
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61 #define USE_SOCKETS |
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62 #include "cryptlib.h" |
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63 /* |
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64 * As for unconditional usage of "UPLINK" interface in this module. |
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65 * Trouble is that unlike Unix file descriptors [which are indexes |
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66 * in kernel-side per-process table], corresponding descriptors on |
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67 * platforms which require "UPLINK" interface seem to be indexes |
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68 * in a user-land, non-global table. Well, in fact they are indexes |
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69 * in stdio _iob[], and recall that _iob[] was the very reason why |
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70 * "UPLINK" interface was introduced in first place. But one way on |
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71 * another. Neither libcrypto or libssl use this BIO meaning that |
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72 * file descriptors can only be provided by application. Therefore |
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73 * "UPLINK" calls are due... |
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74 */ |
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75 /* |
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76 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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77 */ |
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78 |
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79 #include "bio_lcl.h" |
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80 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) |
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81 #include "libcrypto_wsd_macros.h" |
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82 #include "libcrypto_wsd.h" |
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83 #endif |
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84 |
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85 static int fd_write(BIO *h, const char *buf, int num); |
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86 static int fd_read(BIO *h, char *buf, int size); |
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87 static int fd_puts(BIO *h, const char *str); |
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88 static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
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89 static int fd_new(BIO *h); |
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90 static int fd_free(BIO *data); |
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91 int BIO_fd_should_retry(int s); |
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92 #ifndef EMULATOR |
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93 static BIO_METHOD methods_fdp= |
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94 { |
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95 BIO_TYPE_FD,"file descriptor", |
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96 fd_write, |
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97 fd_read, |
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98 fd_puts, |
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99 NULL, /* fd_gets, */ |
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100 fd_ctrl, |
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101 fd_new, |
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102 fd_free, |
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103 NULL, |
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104 }; |
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105 #else |
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106 |
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107 GET_STATIC_VAR_FROM_TLS(methods_fdp,bss_fd,BIO_METHOD) |
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108 #define methods_fdp (*GET_WSD_VAR_NAME(methods_fdp,bss_fd,s)()) |
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109 |
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110 const BIO_METHOD temp_s_methods_fdp= |
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111 { |
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112 BIO_TYPE_FD,"file descriptor", |
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113 fd_write, |
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114 fd_read, |
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115 fd_puts, |
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116 NULL, /* fd_gets, */ |
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117 fd_ctrl, |
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118 fd_new, |
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119 fd_free, |
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120 NULL, |
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121 }; |
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122 |
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123 #endif |
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124 |
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125 EXPORT_C BIO_METHOD *BIO_s_fd(void) |
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126 { |
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127 return(&methods_fdp); |
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128 } |
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129 |
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130 EXPORT_C BIO *BIO_new_fd(int fd,int close_flag) |
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131 { |
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132 BIO *ret; |
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133 ret=BIO_new(BIO_s_fd()); |
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134 if (ret == NULL) return(NULL); |
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135 BIO_set_fd(ret,fd,close_flag); |
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136 return(ret); |
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137 } |
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138 |
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139 static int fd_new(BIO *bi) |
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140 { |
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141 bi->init=0; |
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142 bi->num=-1; |
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143 bi->ptr=NULL; |
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144 bi->flags=BIO_FLAGS_UPLINK; /* essentially redundant */ |
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145 return(1); |
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146 } |
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147 |
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148 static int fd_free(BIO *a) |
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149 { |
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150 if (a == NULL) return(0); |
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151 if (a->shutdown) |
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152 { |
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153 if (a->init) |
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154 { |
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155 UP_close(a->num); |
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156 } |
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157 a->init=0; |
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158 a->flags=BIO_FLAGS_UPLINK; |
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159 } |
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160 return(1); |
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161 } |
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162 |
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163 static int fd_read(BIO *b, char *out,int outl) |
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164 { |
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165 int ret=0; |
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166 |
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167 if (out != NULL) |
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168 { |
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169 clear_sys_error(); |
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170 ret=UP_read(b->num,out,outl); |
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171 BIO_clear_retry_flags(b); |
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172 if (ret <= 0) |
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173 { |
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174 if (BIO_fd_should_retry(ret)) |
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175 BIO_set_retry_read(b); |
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176 } |
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177 } |
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178 return(ret); |
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179 } |
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180 |
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181 static int fd_write(BIO *b, const char *in, int inl) |
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182 { |
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183 int ret; |
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184 clear_sys_error(); |
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185 ret=UP_write(b->num,in,inl); |
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186 BIO_clear_retry_flags(b); |
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187 if (ret <= 0) |
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188 { |
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189 if (BIO_fd_should_retry(ret)) |
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190 BIO_set_retry_write(b); |
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191 } |
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192 return(ret); |
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193 } |
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194 |
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195 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) |
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196 { |
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197 long ret=1; |
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198 int *ip; |
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199 |
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200 switch (cmd) |
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201 { |
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202 case BIO_CTRL_RESET: |
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203 num=0; |
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204 case BIO_C_FILE_SEEK: |
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205 ret=(long)UP_lseek(b->num,num,0); |
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206 break; |
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207 case BIO_C_FILE_TELL: |
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208 case BIO_CTRL_INFO: |
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209 ret=(long)UP_lseek(b->num,0,1); |
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210 break; |
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211 case BIO_C_SET_FD: |
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212 fd_free(b); |
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213 b->num= *((int *)ptr); |
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214 b->shutdown=(int)num; |
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215 b->init=1; |
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216 break; |
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217 case BIO_C_GET_FD: |
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218 if (b->init) |
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219 { |
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220 ip=(int *)ptr; |
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221 if (ip != NULL) *ip=b->num; |
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222 ret=b->num; |
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223 } |
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224 else |
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225 ret= -1; |
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226 break; |
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227 case BIO_CTRL_GET_CLOSE: |
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228 ret=b->shutdown; |
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229 break; |
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230 case BIO_CTRL_SET_CLOSE: |
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231 b->shutdown=(int)num; |
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232 break; |
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233 case BIO_CTRL_PENDING: |
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234 case BIO_CTRL_WPENDING: |
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235 ret=0; |
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236 break; |
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237 case BIO_CTRL_DUP: |
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238 case BIO_CTRL_FLUSH: |
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239 ret=1; |
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240 break; |
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241 default: |
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242 ret=0; |
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243 break; |
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244 } |
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245 return(ret); |
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246 } |
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247 |
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248 static int fd_puts(BIO *bp, const char *str) |
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249 { |
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250 int n,ret; |
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251 |
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252 n=strlen(str); |
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253 ret=fd_write(bp,str,n); |
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254 return(ret); |
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255 } |
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256 |
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257 EXPORT_C int BIO_fd_should_retry(int i) |
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258 { |
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259 int err; |
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260 |
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261 if ((i == 0) || (i == -1)) |
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262 { |
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263 err=get_last_sys_error(); |
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264 |
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265 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ |
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266 if ((i == -1) && (err == 0)) |
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267 return(1); |
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268 #endif |
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269 |
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270 return(BIO_fd_non_fatal_error(err)); |
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271 } |
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272 return(0); |
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273 } |
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274 |
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275 EXPORT_C int BIO_fd_non_fatal_error(int err) |
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276 { |
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277 switch (err) |
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278 { |
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279 |
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280 #ifdef EWOULDBLOCK |
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281 # ifdef WSAEWOULDBLOCK |
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282 # if WSAEWOULDBLOCK != EWOULDBLOCK |
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283 case EWOULDBLOCK: |
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284 # endif |
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285 # else |
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286 case EWOULDBLOCK: |
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287 # endif |
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288 #endif |
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289 |
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290 #if defined(ENOTCONN) |
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291 case ENOTCONN: |
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292 #endif |
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293 |
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294 #ifdef EINTR |
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295 case EINTR: |
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296 #endif |
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297 |
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298 #ifdef EAGAIN |
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299 #if EWOULDBLOCK != EAGAIN |
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300 case EAGAIN: |
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301 # endif |
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302 #endif |
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303 |
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304 #ifdef EPROTO |
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305 case EPROTO: |
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306 #endif |
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307 |
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308 #ifdef EINPROGRESS |
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309 case EINPROGRESS: |
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310 #endif |
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311 |
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312 #ifdef EALREADY |
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313 case EALREADY: |
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314 #endif |
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315 return(1); |
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316 /* break; */ |
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317 default: |
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318 break; |
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319 } |
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320 return(0); |
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321 } |