1 /* crypto/bio/bss_rtcp.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
59 /* Written by David L. Jones <jonesd@kcgl1.eng.ohio-state.edu>
70 #include <iodef.h> /* VMS IO$_ definitions */
71 extern int SYS$QIOW();
72 typedef unsigned short io_channel;
73 /*************************************************************************/
74 struct io_status { short status, count; long flags; };
76 struct rpc_msg { /* Should have member alignment inhibited */
77 char channel; /* 'A'-app data. 'R'-remote client 'G'-global */
78 char function; /* 'G'-get, 'P'-put, 'C'-confirm, 'X'-close */
79 unsigned short int length; /* Amount of data returned or max to return */
80 char data[4092]; /* variable data */
82 #define RPC_HDR_SIZE (sizeof(struct rpc_msg) - 4092)
89 static int rtcp_write(BIO *h,char *buf,int num);
90 static int rtcp_read(BIO *h,char *buf,int size);
91 static int rtcp_puts(BIO *h,char *str);
92 static int rtcp_gets(BIO *h,char *str,int size);
93 static long rtcp_ctrl(BIO *h,int cmd,long arg1,char *arg2);
94 static int rtcp_new(BIO *h);
95 static int rtcp_free(BIO *data);
97 static BIO_METHOD rtcp_method=
110 BIO_METHOD *BIO_s_rtcp(void)
112 return(&rtcp_method);
114 /*****************************************************************************/
115 /* Decnet I/O routines.
117 static int get ( io_channel chan, char *buffer, int maxlen, int *length )
120 struct io_status iosb;
121 status = SYS$QIOW ( 0, chan, IO$_READVBLK, &iosb, 0, 0,
122 buffer, maxlen, 0, 0, 0, 0 );
123 if ( (status&1) == 1 ) status = iosb.status;
124 if ( (status&1) == 1 ) *length = iosb.count;
128 static int put ( io_channel chan, char *buffer, int length )
131 struct io_status iosb;
132 status = SYS$QIOW ( 0, chan, IO$_WRITEVBLK, &iosb, 0, 0,
133 buffer, length, 0, 0, 0, 0 );
134 if ( (status&1) == 1 ) status = iosb.status;
137 /***************************************************************************/
139 static int rtcp_new(BIO *bi)
145 bi->ptr=Malloc(sizeof(struct rpc_ctx));
146 ctx = (struct rpc_ctx *) bi->ptr;
152 static int rtcp_free(BIO *a)
154 if (a == NULL) return(0);
155 if ( a->ptr ) Free ( a->ptr );
160 static int rtcp_read(BIO *b, char *out, int outl)
165 * read data, return existing.
167 ctx = (struct rpc_ctx *) b->ptr;
168 if ( ctx->pos < ctx->filled ) {
169 length = ctx->filled - ctx->pos;
170 if ( length > outl ) length = outl;
171 memmove ( out, &ctx->msg.data[ctx->pos], length );
176 * Requst more data from R channel.
178 ctx->msg.channel = 'R';
179 ctx->msg.function = 'G';
180 ctx->msg.length = sizeof(ctx->msg.data);
181 status = put ( b->num, (char *) &ctx->msg, RPC_HDR_SIZE );
182 if ( (status&1) == 0 ) {
188 ctx->pos = ctx->filled = 0;
189 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
190 if ( (status&1) == 0 ) length = -1;
191 if ( ctx->msg.channel != 'R' || ctx->msg.function != 'C' ) {
194 ctx->filled = length - RPC_HDR_SIZE;
196 if ( ctx->pos < ctx->filled ) {
197 length = ctx->filled - ctx->pos;
198 if ( length > outl ) length = outl;
199 memmove ( out, ctx->msg.data, length );
207 static int rtcp_write(BIO *b, char *in, int inl)
209 int status, i, segment, length;
212 * Output data, send in chunks no larger that sizeof(ctx->msg.data).
214 ctx = (struct rpc_ctx *) b->ptr;
215 for ( i = 0; i < inl; i += segment ) {
217 if ( segment > sizeof(ctx->msg.data) ) segment = sizeof(ctx->msg.data);
218 ctx->msg.channel = 'R';
219 ctx->msg.function = 'P';
220 ctx->msg.length = segment;
221 memmove ( ctx->msg.data, &in[i], segment );
222 status = put ( b->num, (char *) &ctx->msg, segment + RPC_HDR_SIZE );
223 if ((status&1) == 0 ) { i = -1; break; }
225 status = get ( b->num, (char *) &ctx->msg, sizeof(ctx->msg), &length );
226 if ( ((status&1) == 0) || (length < RPC_HDR_SIZE) ) { i = -1; break; }
227 if ( (ctx->msg.channel != 'R') || (ctx->msg.function != 'C') ) {
228 printf("unexpected response when confirming put %c %c\n",
229 ctx->msg.channel, ctx->msg.function );
236 static long rtcp_ctrl(BIO *b, int cmd, long num, char *ptr)
250 case BIO_CTRL_SET_CLOSE:
255 case BIO_CTRL_GET_CLOSE:
258 case BIO_CTRL_PENDING:
259 case BIO_CTRL_WPENDING:
267 static int rtcp_gets(BIO *bp, char *buf, int size)
272 static int rtcp_puts(BIO *bp, char *str)
275 if (str == NULL) return(0);
276 length = strlen ( str );
277 if ( length == 0 ) return (0);
278 return rtcp_write ( bp,str, length );