1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
The oRTP library is an RTP (Realtime Transport Protocol - rfc1889) stack.
Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef RTCP_H
#define RTCP_H
#include <rtpport.h>
#define RTCP_MAX_RECV_BUFSIZE 1024
#define RTCP_SENDER_INFO_SIZE 20
#define RTCP_REPORT_BLOCK_SIZE 24
#define RTCP_COMMON_HEADER_SIZE 4
#define RTCP_SSRC_FIELD_SIZE 4
/* RTCP common header */
typedef enum {
RTCP_SR = 200,
RTCP_RR = 201,
RTCP_SDES = 202,
RTCP_BYE = 203,
RTCP_APP = 204
} rtcp_type_t;
typedef struct rtcp_common_header
{
#ifdef WORDS_BIGENDIAN
guint16 version:2;
guint16 padbit:1;
guint16 rc:5;
guint16 packet_type:8;
#else
guint16 rc:5;
guint16 padbit:1;
guint16 version:2;
guint16 packet_type:8;
#endif
guint16 length:16;
} rtcp_common_header_t;
#define rtcp_common_header_set_version(ch,v) (ch)->version=v
#define rtcp_common_header_set_padbit(ch,p) (ch)->padbit=p
#define rtcp_common_header_set_rc(ch,rc) (ch)->rc=rc
#define rtcp_common_header_set_packet_type(ch,pt) (ch)->packet_type=pt
#define rtcp_common_header_set_length(ch,l) (ch)->length=htons(l)
#define rtcp_common_header_get_version(ch,v) ((ch)->version)
#define rtcp_common_header_get padbit(ch,p) ((ch)->padbit)
#define rtcp_common_header_get_rc(ch,rc) ((ch)->rc)
#define rtcp_common_header_get_packet_type(ch,pt) ((ch)->packet_type)
#define rtcp_common_header_get_length(ch,l) ntohs((ch)->length)
/* SR or RR packets */
typedef struct sender_info
{
guint32 ntp_timestamp_msw;
guint32 ntp_timestamp_lsw;
guint32 rtp_timestamp;
guint32 senders_packet_count;
guint32 senders_octet_count;
} sender_info_t;
typedef struct report_block
{
guint32 ssrc;
guint32 fraction_lost:8;
guint32 cum_num_packet_lost:24; /*cumulative number of packet lost*/
guint32 ext_high_seq_num_rec; /*extended highest sequence number received */
guint32 interarrival_jitter;
guint32 lsr; /*last SR */
guint32 delay_snc_last_sr; /*delay since last sr*/
} report_block_t;
/* SDES packets */
typedef enum {
RTCP_SDES_END = 0,
RTCP_SDES_CNAME = 1,
RTCP_SDES_NAME = 2,
RTCP_SDES_EMAIL = 3,
RTCP_SDES_PHONE = 4,
RTCP_SDES_LOC = 5,
RTCP_SDES_TOOL = 6,
RTCP_SDES_NOTE = 7,
RTCP_SDES_PRIV = 8,
RTCP_SDES_MAX = 9
} rtcp_sdes_type_t;
typedef struct sdes_chunk
{
guint32 csrc;
} sdes_chunk_t;
typedef struct sdes_item
{
guint8 item_type;
guint8 len;
gchar content[1];
} sdes_item_t;
#define RTCP_SDES_MAX_STRING_SIZE 255
#define RTCP_SDES_ITEM_HEADER_SIZE 2
#define RTCP_SDES_CHUNK_DEFAULT_SIZE 1024
#define RTCP_SDES_CHUNK_HEADER_SIZE (sizeof(sdes_chunk_t))
/* RTCP bye packet */
typedef struct rtcp_bye_reason
{
guint8 len;
gchar content[1];
} rtcp_bye_reason_t;
typedef struct rtcp_bye
{
rtcp_common_header_t ch;
guint32 ssrc[1]; /* the bye may contain several ssrc/csrc */
} rtcp_bye_t;
#define RTCP_BYE_HEADER_SIZE sizeof(rtcp_bye_t)
#define RTCP_BYE_REASON_MAX_STRING_SIZE 255
#define rtcp_bye_set_ssrc(b,pos,ssrc) (b)->ssrc[pos]=htonl(ssrc)
#define rtcp_bye_get_ssrc(b,pos) ntohl((b)->ssrc[pos])
typedef struct rtcp_sr{
rtcp_common_header_t ch;
guint32 ssrc;
sender_info_t si;
report_block_t rb[1];
} rtcp_sr_t;
typedef struct rtcp_rr{
rtcp_common_header_t ch;
guint32 ssrc;
report_block_t rb[1];
} rtcp_rr_t;
struct _RtpSession;
void rtp_session_rtcp_process(struct _RtpSession *s);
#define RTCP_DEFAULT_REPORT_INTERVAL 5
#endif
|
