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1 /* crypto/bio/bss_rtcp.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 /* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu> |
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60 * Date: 22-JUL-1996 |
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61 * Revised: 25-SEP-1997 Update for 0.8.1, BIO_CTRL_SET -> BIO_C_SET_FD |
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62 */ |
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63 /* VMS */ |
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64 #include <stdio.h> |
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65 #include <stdlib.h> |
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66 #include <string.h> |
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67 #include <errno.h> |
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68 #include "cryptlib.h" |
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69 #include <openssl/bio.h> |
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70 |
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71 #include <iodef.h> /* VMS IO$_ definitions */ |
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72 #include <starlet.h> |
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73 |
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74 typedef unsigned short io_channel; |
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75 /*************************************************************************/ |
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76 struct io_status { short status, count; long flags; }; |
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77 |
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78 struct rpc_msg { /* Should have member alignment inhibited */ |
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79 char channel; /* 'A'-app data. 'R'-remote client 'G'-global */ |
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80 char function; /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */ |
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81 unsigned short int length; /* Amount of data returned or max to return */ |
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82 char data[4092]; /* variable data */ |
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83 }; |
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84 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092) |
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85 |
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86 struct rpc_ctx { |
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87 int filled, pos; |
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88 struct rpc_msg msg; |
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89 }; |
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90 |
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91 static int rtcp_write(BIO *h,const char *buf,int num); |
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92 static int rtcp_read(BIO *h,char *buf,int size); |
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93 static int rtcp_puts(BIO *h,const char *str); |
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94 static int rtcp_gets(BIO *h,char *str,int size); |
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95 static long rtcp_ctrl(BIO *h,int cmd,long arg1,void *arg2); |
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96 static int rtcp_new(BIO *h); |
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97 static int rtcp_free(BIO *data); |
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98 |
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99 static BIO_METHOD rtcp_method= |
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100 { |
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101 BIO_TYPE_FD, |
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102 "RTCP", |
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103 rtcp_write, |
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104 rtcp_read, |
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105 rtcp_puts, |
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106 rtcp_gets, |
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107 rtcp_ctrl, |
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108 rtcp_new, |
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109 rtcp_free, |
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110 NULL, |
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111 }; |
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112 |
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113 BIO_METHOD *BIO_s_rtcp(void) |
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114 { |
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115 return(&rtcp_method); |
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116 } |
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117 /*****************************************************************************/ |
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118 /* Decnet I/O routines. |
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119 */ |
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120 |
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121 #ifdef __DECC |
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122 #pragma message save |
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123 #pragma message disable DOLLARID |
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124 #endif |
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125 |
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126 static int get ( io_channel chan, char *buffer, int maxlen, int *length ) |
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127 { |
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128 int status; |
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129 struct io_status iosb; |
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130 status = sys$qiow ( 0, chan, IO$_READVBLK, &iosb, 0, 0, |
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131 buffer, maxlen, 0, 0, 0, 0 ); |
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132 if ( (status&1) == 1 ) status = iosb.status; |
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133 if ( (status&1) == 1 ) *length = iosb.count; |
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134 return status; |
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135 } |
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136 |
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137 static int put ( io_channel chan, char *buffer, int length ) |
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138 { |
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139 int status; |
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140 struct io_status iosb; |
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141 status = sys$qiow ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0, |
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142 buffer, length, 0, 0, 0, 0 ); |
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143 if ( (status&1) == 1 ) status = iosb.status; |
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144 return status; |
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145 } |
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146 |
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147 #ifdef __DECC |
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148 #pragma message restore |
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149 #endif |
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150 |
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151 /***************************************************************************/ |
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152 |
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153 static int rtcp_new(BIO *bi) |
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154 { |
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155 struct rpc_ctx *ctx; |
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156 bi->init=1; |
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157 bi->num=0; |
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158 bi->flags = 0; |
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159 bi->ptr=OPENSSL_malloc(sizeof(struct rpc_ctx)); |
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160 ctx = (struct rpc_ctx *) bi->ptr; |
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161 ctx->filled = 0; |
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162 ctx->pos = 0; |
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163 return(1); |
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164 } |
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165 |
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166 static int rtcp_free(BIO *a) |
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167 { |
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168 if (a == NULL) return(0); |
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169 if ( a->ptr ) OPENSSL_free ( a->ptr ); |
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170 a->ptr = NULL; |
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171 return(1); |
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172 } |
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173 |
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174 static int rtcp_read(BIO *b, char *out, int outl) |
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175 { |
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176 int status, length; |
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177 struct rpc_ctx *ctx; |
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178 /* |
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179 * read data, return existing. |
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180 */ |
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181 ctx = (struct rpc_ctx *) b->ptr; |
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182 if ( ctx->pos < ctx->filled ) { |
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183 length = ctx->filled - ctx->pos; |
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184 if ( length > outl ) length = outl; |
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185 memmove ( out, &ctx->msg.data[ctx->pos], length ); |
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186 ctx->pos += length; |
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187 return length; |
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188 } |
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189 /* |
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190 * Requst more data from R channel. |
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191 */ |
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192 ctx->msg.channel = 'R'; |
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193 ctx->msg.function = 'G'; |
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194 ctx->msg.length = sizeof(ctx->msg.data); |
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195 status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE ); |
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196 if ( (status&1) == 0 ) { |
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197 return -1; |
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198 } |
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199 /* |
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200 * Read. |
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201 */ |
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202 ctx->pos = ctx->filled = 0; |
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203 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length ); |
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204 if ( (status&1) == 0 ) length = -1; |
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205 if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) { |
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206 length = -1; |
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207 } |
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208 ctx->filled = length - RPC_HDR_SIZE; |
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209 |
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210 if ( ctx->pos < ctx->filled ) { |
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211 length = ctx->filled - ctx->pos; |
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212 if ( length > outl ) length = outl; |
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213 memmove ( out, ctx->msg.data, length ); |
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214 ctx->pos += length; |
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215 return length; |
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216 } |
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217 |
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218 return length; |
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219 } |
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220 |
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221 static int rtcp_write(BIO *b, const char *in, int inl) |
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222 { |
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223 int status, i, segment, length; |
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224 struct rpc_ctx *ctx; |
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225 /* |
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226 * Output data, send in chunks no larger that sizeof(ctx->msg.data). |
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227 */ |
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228 ctx = (struct rpc_ctx *) b->ptr; |
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229 for ( i = 0; i < inl; i += segment ) { |
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230 segment = inl - i; |
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231 if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data); |
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232 ctx->msg.channel = 'R'; |
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233 ctx->msg.function = 'P'; |
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234 ctx->msg.length = segment; |
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235 memmove ( ctx->msg.data, &in[i], segment ); |
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236 status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE ); |
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237 if ((status&1) == 0 ) { i = -1; break; } |
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238 |
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239 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length ); |
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240 if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; } |
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241 if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) { |
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242 printf("unexpected response when confirming put %c %c\n", |
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243 ctx->msg.channel, ctx->msg.function ); |
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244 |
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245 } |
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246 } |
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247 return(i); |
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248 } |
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249 |
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250 static long rtcp_ctrl(BIO *b, int cmd, long num, void *ptr) |
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251 { |
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252 long ret=1; |
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253 |
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254 switch (cmd) |
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255 { |
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256 case BIO_CTRL_RESET: |
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257 case BIO_CTRL_EOF: |
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258 ret = 1; |
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259 break; |
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260 case BIO_C_SET_FD: |
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261 b->num = num; |
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262 ret = 1; |
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263 break; |
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264 case BIO_CTRL_SET_CLOSE: |
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265 case BIO_CTRL_FLUSH: |
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266 case BIO_CTRL_DUP: |
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267 ret=1; |
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268 break; |
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269 case BIO_CTRL_GET_CLOSE: |
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270 case BIO_CTRL_INFO: |
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271 case BIO_CTRL_GET: |
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272 case BIO_CTRL_PENDING: |
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273 case BIO_CTRL_WPENDING: |
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274 default: |
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275 ret=0; |
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276 break; |
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277 } |
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278 return(ret); |
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279 } |
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280 |
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281 static int rtcp_gets(BIO *bp, char *buf, int size) |
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282 { |
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283 return(0); |
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284 } |
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285 |
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286 static int rtcp_puts(BIO *bp, const char *str) |
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287 { |
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288 int length; |
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289 if (str == NULL) return(0); |
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290 length = strlen ( str ); |
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291 if ( length == 0 ) return (0); |
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292 return rtcp_write ( bp,str, length ); |
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293 } |
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294 |