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Diffstat (limited to 'srtp/include/srtp_priv.h')
| -rw-r--r-- | srtp/include/srtp_priv.h | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/srtp/include/srtp_priv.h b/srtp/include/srtp_priv.h deleted file mode 100644 index de273ab..0000000 --- a/srtp/include/srtp_priv.h +++ /dev/null @@ -1,245 +0,0 @@ -/* - * srtp_priv.h - * - * private internal data structures and functions for libSRTP - * - * David A. McGrew - * Cisco Systems, Inc. - */ -/* - * - * Copyright (c) 2001-2006 Cisco Systems, Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials provided - * with the distribution. - * - * Neither the name of the Cisco Systems, Inc. nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#ifndef SRTP_PRIV_H -#define SRTP_PRIV_H - -#include "srtp.h" -#include "rdbx.h" -#include "rdb.h" -#include "integers.h" - -/* - * an srtp_hdr_t represents the srtp header - * - * in this implementation, an srtp_hdr_t is assumed to be 32-bit aligned - * - * (note that this definition follows that of RFC 1889 Appendix A, but - * is not identical) - */ - -#ifndef WORDS_BIGENDIAN - -/* - * srtp_hdr_t represents an RTP or SRTP header. The bit-fields in - * this structure should be declared "unsigned int" instead of - * "unsigned char", but doing so causes the MS compiler to not - * fully pack the bit fields. - */ - -typedef struct { - unsigned char cc:4; /* CSRC count */ - unsigned char x:1; /* header extension flag */ - unsigned char p:1; /* padding flag */ - unsigned char version:2; /* protocol version */ - unsigned char pt:7; /* payload type */ - unsigned char m:1; /* marker bit */ - uint16_t seq; /* sequence number */ - uint32_t ts; /* timestamp */ - uint32_t ssrc; /* synchronization source */ -} srtp_hdr_t; - -#else /* BIG_ENDIAN */ - -typedef struct { - unsigned char version:2; /* protocol version */ - unsigned char p:1; /* padding flag */ - unsigned char x:1; /* header extension flag */ - unsigned char cc:4; /* CSRC count */ - unsigned char m:1; /* marker bit */ - unsigned pt:7; /* payload type */ - uint16_t seq; /* sequence number */ - uint32_t ts; /* timestamp */ - uint32_t ssrc; /* synchronization source */ -} srtp_hdr_t; - -#endif - -typedef struct { - uint16_t profile_specific; /* profile-specific info */ - uint16_t length; /* number of 32-bit words in extension */ -} srtp_hdr_xtnd_t; - - -/* - * srtcp_hdr_t represents a secure rtcp header - * - * in this implementation, an srtcp header is assumed to be 32-bit - * alinged - */ - -#ifndef WORDS_BIGENDIAN - -typedef struct { - unsigned char rc:5; /* reception report count */ - unsigned char p:1; /* padding flag */ - unsigned char version:2; /* protocol version */ - unsigned char pt:8; /* payload type */ - uint16_t len; /* length */ - uint32_t ssrc; /* synchronization source */ -} srtcp_hdr_t; - -typedef struct { - unsigned int index:31; /* srtcp packet index in network order! */ - unsigned int e:1; /* encrypted? 1=yes */ - /* optional mikey/etc go here */ - /* and then the variable-length auth tag */ -} srtcp_trailer_t; - - -#else /* BIG_ENDIAN */ - -typedef struct { - unsigned char version:2; /* protocol version */ - unsigned char p:1; /* padding flag */ - unsigned char rc:5; /* reception report count */ - unsigned char pt:8; /* payload type */ - uint16_t len; /* length */ - uint32_t ssrc; /* synchronization source */ -} srtcp_hdr_t; - -typedef struct { - unsigned int version:2; /* protocol version */ - unsigned int p:1; /* padding flag */ - unsigned int count:5; /* varies by packet type */ - unsigned int pt:8; /* payload type */ - uint16_t length; /* len of uint32s of packet less header */ -} rtcp_common_t; - -typedef struct { - unsigned int e:1; /* encrypted? 1=yes */ - unsigned int index:31; /* srtcp packet index */ - /* optional mikey/etc go here */ - /* and then the variable-length auth tag */ -} srtcp_trailer_t; - -#endif - - -/* - * the following declarations are libSRTP internal functions - */ - -/* - * srtp_get_stream(ssrc) returns a pointer to the stream corresponding - * to ssrc, or NULL if no stream exists for that ssrc - */ - -srtp_stream_t -srtp_get_stream(srtp_t srtp, uint32_t ssrc); - - -/* - * srtp_stream_init_keys(s, k) (re)initializes the srtp_stream_t s by - * deriving all of the needed keys using the KDF and the key k. - */ - - -err_status_t -srtp_stream_init_keys(srtp_stream_t srtp, const void *key); - -/* - * libsrtp internal datatypes - */ - -typedef enum direction_t { - dir_unknown = 0, - dir_srtp_sender = 1, - dir_srtp_receiver = 2 -} direction_t; - -/* - * an srtp_stream_t has its own SSRC, encryption key, authentication - * key, sequence number, and replay database - * - * note that the keys might not actually be unique, in which case the - * cipher_t and auth_t pointers will point to the same structures - */ - -typedef struct srtp_stream_ctx_t { - uint32_t ssrc; - cipher_t *rtp_cipher; - auth_t *rtp_auth; - rdbx_t rtp_rdbx; - sec_serv_t rtp_services; - cipher_t *rtcp_cipher; - auth_t *rtcp_auth; - rdb_t rtcp_rdb; - sec_serv_t rtcp_services; - key_limit_ctx_t *limit; - direction_t direction; - struct srtp_stream_ctx_t *next; /* linked list of streams */ -} srtp_stream_ctx_t; - - -/* - * an srtp_ctx_t holds a stream list and a service description - */ - -typedef struct srtp_ctx_t { - srtp_stream_ctx_t *stream_list; /* linked list of streams */ - srtp_stream_ctx_t *stream_template; /* act as template for other streams */ -} srtp_ctx_t; - - - -/* - * srtp_handle_event(srtp, srtm, evnt) calls the event handling - * function, if there is one. - * - * This macro is not included in the documentation as it is - * an internal-only function. - */ - -#define srtp_handle_event(srtp, strm, evnt) \ - if(srtp_event_handler) { \ - srtp_event_data_t data; \ - data.session = srtp; \ - data.stream = strm; \ - data.event = evnt; \ - srtp_event_handler(&data); \ -} - - -#endif /* SRTP_PRIV_H */ |