1 /* crypto/bio/bss_rtcp.c */
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 /* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu>
60 * Date: 22-JUL-1996
61 * Revised: 25-SEP-1997 Update for 0.8.1, BIO_CTRL_SET -> BIO_C_SET_FD
62 */
63 /* VMS */
64 #include <stdio.h>
65 #include <stdlib.h>
66 #include <string.h>
67 #include <errno.h>
68 #include "cryptlib.h"
69 #include <openssl/bio.h>
70
71 #include <iodef.h> /* VMS IO$_ definitions */
72 #include <starlet.h>
73
74 typedef unsigned short io_channel;
75 /*************************************************************************/
76 struct io_status { short status, count; long flags; };
77
78 struct rpc_msg { /* Should have member alignment inhibited */
79 char channel; /* 'A'-app data. 'R'-remote client 'G'-global */
80 char function; /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
81 unsigned short int length; /* Amount of data returned or max to return */
82 char data[4092]; /* variable data */
83 };
84 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
85
86 struct rpc_ctx {
87 int filled, pos;
88 struct rpc_msg msg;
89 };
90
91 static int rtcp_write(BIO *h,const char *buf,int num);
92 static int rtcp_read(BIO *h,char *buf,int size);
93 static int rtcp_puts(BIO *h,const char *str);
94 static int rtcp_gets(BIO *h,char *str,int size);
95 static long rtcp_ctrl(BIO *h,int cmd,long arg1,void *arg2);
96 static int rtcp_new(BIO *h);
97 static int rtcp_free(BIO *data);
98
99 static BIO_METHOD rtcp_method=
100 {
101 BIO_TYPE_FD,
102 "RTCP",
103 rtcp_write,
104 rtcp_read,
105 rtcp_puts,
106 rtcp_gets,
107 rtcp_ctrl,
108 rtcp_new,
109 rtcp_free,
110 NULL,
111 };
112
BIO_s_rtcp(void)113 BIO_METHOD *BIO_s_rtcp(void)
114 {
115 return(&rtcp_method);
116 }
117 /*****************************************************************************/
118 /* Decnet I/O routines.
119 */
120
121 #ifdef __DECC
122 #pragma message save
123 #pragma message disable DOLLARID
124 #endif
125
get(io_channel chan,char * buffer,int maxlen,int * length)126 static int get ( io_channel chan, char *buffer, int maxlen, int *length )
127 {
128 int status;
129 struct io_status iosb;
130 status = sys$qiow ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
131 buffer, maxlen, 0, 0, 0, 0 );
132 if ( (status&1) == 1 ) status = iosb.status;
133 if ( (status&1) == 1 ) *length = iosb.count;
134 return status;
135 }
136
put(io_channel chan,char * buffer,int length)137 static int put ( io_channel chan, char *buffer, int length )
138 {
139 int status;
140 struct io_status iosb;
141 status = sys$qiow ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
142 buffer, length, 0, 0, 0, 0 );
143 if ( (status&1) == 1 ) status = iosb.status;
144 return status;
145 }
146
147 #ifdef __DECC
148 #pragma message restore
149 #endif
150
151 /***************************************************************************/
152
rtcp_new(BIO * bi)153 static int rtcp_new(BIO *bi)
154 {
155 struct rpc_ctx *ctx;
156 bi->init=1;
157 bi->num=0;
158 bi->flags = 0;
159 bi->ptr=OPENSSL_malloc(sizeof(struct rpc_ctx));
160 ctx = (struct rpc_ctx *) bi->ptr;
161 ctx->filled = 0;
162 ctx->pos = 0;
163 return(1);
164 }
165
rtcp_free(BIO * a)166 static int rtcp_free(BIO *a)
167 {
168 if (a == NULL) return(0);
169 if ( a->ptr ) OPENSSL_free ( a->ptr );
170 a->ptr = NULL;
171 return(1);
172 }
173
rtcp_read(BIO * b,char * out,int outl)174 static int rtcp_read(BIO *b, char *out, int outl)
175 {
176 int status, length;
177 struct rpc_ctx *ctx;
178 /*
179 * read data, return existing.
180 */
181 ctx = (struct rpc_ctx *) b->ptr;
182 if ( ctx->pos < ctx->filled ) {
183 length = ctx->filled - ctx->pos;
184 if ( length > outl ) length = outl;
185 memmove ( out, &ctx->msg.data[ctx->pos], length );
186 ctx->pos += length;
187 return length;
188 }
189 /*
190 * Requst more data from R channel.
191 */
192 ctx->msg.channel = 'R';
193 ctx->msg.function = 'G';
194 ctx->msg.length = sizeof(ctx->msg.data);
195 status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE );
196 if ( (status&1) == 0 ) {
197 return -1;
198 }
199 /*
200 * Read.
201 */
202 ctx->pos = ctx->filled = 0;
203 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
204 if ( (status&1) == 0 ) length = -1;
205 if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) {
206 length = -1;
207 }
208 ctx->filled = length - RPC_HDR_SIZE;
209
210 if ( ctx->pos < ctx->filled ) {
211 length = ctx->filled - ctx->pos;
212 if ( length > outl ) length = outl;
213 memmove ( out, ctx->msg.data, length );
214 ctx->pos += length;
215 return length;
216 }
217
218 return length;
219 }
220
rtcp_write(BIO * b,const char * in,int inl)221 static int rtcp_write(BIO *b, const char *in, int inl)
222 {
223 int status, i, segment, length;
224 struct rpc_ctx *ctx;
225 /*
226 * Output data, send in chunks no larger that sizeof(ctx->msg.data).
227 */
228 ctx = (struct rpc_ctx *) b->ptr;
229 for ( i = 0; i < inl; i += segment ) {
230 segment = inl - i;
231 if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data);
232 ctx->msg.channel = 'R';
233 ctx->msg.function = 'P';
234 ctx->msg.length = segment;
235 memmove ( ctx->msg.data, &in[i], segment );
236 status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE );
237 if ((status&1) == 0 ) { i = -1; break; }
238
239 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
240 if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; }
241 if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) {
242 printf("unexpected response when confirming put %c %c\n",
243 ctx->msg.channel, ctx->msg.function );
244
245 }
246 }
247 return(i);
248 }
249
rtcp_ctrl(BIO * b,int cmd,long num,void * ptr)250 static long rtcp_ctrl(BIO *b, int cmd, long num, void *ptr)
251 {
252 long ret=1;
253
254 switch (cmd)
255 {
256 case BIO_CTRL_RESET:
257 case BIO_CTRL_EOF:
258 ret = 1;
259 break;
260 case BIO_C_SET_FD:
261 b->num = num;
262 ret = 1;
263 break;
264 case BIO_CTRL_SET_CLOSE:
265 case BIO_CTRL_FLUSH:
266 case BIO_CTRL_DUP:
267 ret=1;
268 break;
269 case BIO_CTRL_GET_CLOSE:
270 case BIO_CTRL_INFO:
271 case BIO_CTRL_GET:
272 case BIO_CTRL_PENDING:
273 case BIO_CTRL_WPENDING:
274 default:
275 ret=0;
276 break;
277 }
278 return(ret);
279 }
280
rtcp_gets(BIO * bp,char * buf,int size)281 static int rtcp_gets(BIO *bp, char *buf, int size)
282 {
283 return(0);
284 }
285
rtcp_puts(BIO * bp,const char * str)286 static int rtcp_puts(BIO *bp, const char *str)
287 {
288 int length;
289 if (str == NULL) return(0);
290 length = strlen ( str );
291 if ( length == 0 ) return (0);
292 return rtcp_write ( bp,str, length );
293 }
294
295