2 * Asterisk -- An open source telephony toolkit.
4 * Implementation of Inter-Asterisk eXchange
6 * Copyright (C) 2003, Digium
8 * Mark Spencer <markster@digium.com>
10 * This program is free software, distributed under the terms of
11 * the GNU General Public License
15 * \brief Implementation of the IAX2 protocol
18 #ifndef _IAX2_PARSER_H
19 #define _IAX2_PARSER_H
21 #include "asterisk/frame.h"
22 #include "asterisk/linkedlists.h"
23 #include "asterisk/crypto.h"
37 iax2_format capability;
42 unsigned short adsicpe;
45 unsigned int authmethods;
46 unsigned int encmethods;
50 struct ast_sockaddr apparent_addr;
51 unsigned short refresh;
52 unsigned short dpstatus;
53 unsigned short callno;
55 unsigned char causecode;
56 unsigned char iax_unknown;
60 unsigned int transferid;
61 unsigned int datetime;
66 unsigned char *fwdata;
67 unsigned char fwdatalen;
68 unsigned char *enckey;
69 unsigned char enckeylen;
71 unsigned short samprate;
73 unsigned int rr_jitter;
76 unsigned short rr_delay;
77 unsigned int rr_dropped;
79 struct ast_variable *vars;
80 char *osptokenblock[IAX_MAX_OSPBLOCK_NUM];
81 unsigned int ospblocklength[IAX_MAX_OSPBLOCK_NUM];
82 unsigned char calltoken;
83 unsigned char *calltokendata;
86 #define DIRECTION_INGRESS 1
87 #define DIRECTION_OUTGRESS 2
91 struct iax_session *session;
92 struct iax_event *event;
97 /*! /Our/ call number */
98 unsigned short callno;
99 /*! /Their/ call number */
100 unsigned short dcallno;
101 /*! Start of raw frame (outgoing only) */
103 /*! Length of frame (outgoing only) */
105 /*! How many retries so far? */
107 /*! Outgoing relative timestamp (ms) */
109 /*! How long to wait before retrying */
111 /*! Are we received out of order? */
112 unsigned int outoforder:1;
113 /*! Have we been sent at all yet? */
114 unsigned int sentyet:1;
115 /*! Non-zero if should be sent to transfer peer */
116 unsigned int transfer:1;
117 /*! Non-zero if this is the final message */
118 unsigned int final:1;
119 /*! Ingress or outgres */
120 unsigned int direction:2;
121 /*! Can this frame be cached? */
122 unsigned int cacheable:1;
123 /*! Outgoing Packet sequence number */
125 /*! Next expected incoming packet sequence number */
127 /*! Retransmission ID */
129 /*! is this packet encrypted or not. if set this varible holds encryption methods*/
131 /*! store encrypt key */
132 ast_aes_encrypt_key ecx;
133 /*! store decrypt key which corresponds to ecx */
134 ast_aes_decrypt_key mydcx;
135 /*! random data for encryption pad */
136 unsigned char semirand[32];
138 AST_LIST_ENTRY(iax_frame) list;
139 /*! Actual, isolated frame header */
141 /*! Amount of space _allocated_ for data */
143 unsigned char unused[AST_FRIENDLY_OFFSET];
144 unsigned char afdata[0]; /* Data for frame */
148 unsigned char buf[1024];
152 /* Choose a different function for output */
153 void iax_set_output(void (*output)(const char *data));
154 /* Choose a different function for errors */
155 void iax_set_error(void (*output)(const char *data));
156 void iax_showframe(struct iax_frame *f, struct ast_iax2_full_hdr *fhi, int rx, struct ast_sockaddr *addr, int datalen);
157 void iax_frame_subclass2str(enum iax_frame_subclass subclass, char *str, size_t len);
159 const char *iax_ie2str(int ie);
161 int iax_ie_append_raw(struct iax_ie_data *ied, unsigned char ie, const void *data, int datalen);
162 int iax_ie_append_addr(struct iax_ie_data *ied, unsigned char ie, const struct ast_sockaddr *addr);
163 int iax_ie_append_versioned_uint64(struct iax_ie_data *ied, unsigned char ie, unsigned char version, uint64_t value);
164 int iax_ie_append_int(struct iax_ie_data *ied, unsigned char ie, unsigned int value);
165 int iax_ie_append_short(struct iax_ie_data *ied, unsigned char ie, unsigned short value);
166 int iax_ie_append_str(struct iax_ie_data *ied, unsigned char ie, const char *str);
167 int iax_ie_append_byte(struct iax_ie_data *ied, unsigned char ie, unsigned char dat);
168 int iax_ie_append(struct iax_ie_data *ied, unsigned char ie);
169 int iax_parse_ies(struct iax_ies *ies, unsigned char *data, int datalen);
171 int iax_get_frames(void);
172 int iax_get_iframes(void);
173 int iax_get_oframes(void);
175 void iax_frame_wrap(struct iax_frame *fr, struct ast_frame *f);
176 struct iax_frame *iax_frame_new(int direction, int datalen, unsigned int cacheable);
177 void iax_frame_free(struct iax_frame *fr);