channels/iax2-parser.h

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * Implementation of Inter-Asterisk eXchange
   5  *
   6  * Copyright (C) 2003, Digium
   7  *
   8  * Mark Spencer <markster@digium.com>
   9  *
  10  * This program is free software, distributed under the terms of
  11  * the GNU General Public License
  12  */
  13
  14 /*!\file
  15  * \brief Implementation of the IAX2 protocol
  16  */
  17
  18 #ifndef _IAX2_PARSER_H
  19 #define _IAX2_PARSER_H
  20
  21 #include "asterisk/linkedlists.h"
  22
  23 struct iax_ies {
  24         char *called_number;
  25         char *calling_number;
  26         char *calling_ani;
  27         char *calling_name;
  28         int calling_ton;
  29         int calling_tns;
  30         int calling_pres;
  31         char *called_context;
  32         char *username;
  33         char *password;
  34         unsigned int capability;
  35         unsigned int format;
  36         char *codec_prefs;
  37         char *language;
  38         int version;
  39         unsigned short adsicpe;
  40         char *dnid;
  41         char *rdnis;
  42         unsigned int authmethods;
  43         unsigned int encmethods;
  44         char *challenge;
  45         char *md5_result;
  46         char *rsa_result;
  47         struct sockaddr_in *apparent_addr;
  48         unsigned short refresh;
  49         unsigned short dpstatus;
  50         unsigned short callno;
  51         char *cause;
  52         unsigned char causecode;
  53         unsigned char iax_unknown;
  54         int msgcount;
  55         int autoanswer;
  56         int musiconhold;
  57         unsigned int transferid;
  58         unsigned int datetime;
  59         char *devicetype;
  60         char *serviceident;
  61         int firmwarever;
  62         unsigned int fwdesc;
  63         unsigned char *fwdata;
  64         unsigned char fwdatalen;
  65         unsigned char *enckey;
  66         unsigned char enckeylen;
  67         unsigned int provver;
  68         unsigned short samprate;
  69         int provverpres;
  70         unsigned int rr_jitter;
  71         unsigned int rr_loss;
  72         unsigned int rr_pkts;
  73         unsigned short rr_delay;
  74         unsigned int rr_dropped;
  75         unsigned int rr_ooo;
  76 };
  77
  78 #define DIRECTION_INGRESS 1
  79 #define DIRECTION_OUTGRESS 2
  80
  81 struct iax_frame {
  82 #ifdef LIBIAX
  83         struct iax_session *session;
  84         struct iax_event *event;
  85 #else
  86         int sockfd;
  87 #endif
  88
  89         /* /Our/ call number */
  90         unsigned short callno;
  91         /* /Their/ call number */
  92         unsigned short dcallno;
  93         /* Start of raw frame (outgoing only) */
  94         void *data;
  95         /* Length of frame (outgoing only) */
  96         int datalen;
  97         /* How many retries so far? */
  98         int retries;
  99         /* Outgoing relative timestamp (ms) */
 100         unsigned int ts;
 101         /* How long to wait before retrying */
 102         int retrytime;
 103         /* Are we received out of order?  */
 104         unsigned int outoforder:1;
 105         /* Have we been sent at all yet? */
 106         unsigned int sentyet:1;
 107         /* Non-zero if should be sent to transfer peer */
 108         unsigned int transfer:1;
 109         /* Non-zero if this is the final message */
 110         unsigned int final:1;
 111         /* Ingress or outgres */
 112         unsigned int direction:2;
 113         /* Can this frame be cached? */
 114         unsigned int cacheable:1;
 115         /* Outgoing Packet sequence number */
 116         int oseqno;
 117         /* Next expected incoming packet sequence number */
 118         int iseqno;
 119         /* Retransmission ID */
 120         int retrans;
 121         /* Easy linking */
 122         AST_LIST_ENTRY(iax_frame) list;
 123         /* Actual, isolated frame header */
 124         struct ast_frame af;
 125         /*! Amount of space _allocated_ for data */
 126         size_t afdatalen;
 127         unsigned char unused[AST_FRIENDLY_OFFSET];
 128         unsigned char afdata[0];        /* Data for frame */
 129 };
 130
 131 struct iax_ie_data {
 132         unsigned char buf[1024];
 133         int pos;
 134 };
 135
 136 /* Choose a different function for output */
 137 void iax_set_output(void (*output)(const char *data));
 138 /* Choose a different function for errors */
 139 void iax_set_error(void (*output)(const char *data));
 140 void iax_showframe(struct iax_frame *f, struct ast_iax2_full_hdr *fhi, int rx, struct sockaddr_in *sin, int datalen);
 141
 142 const char *iax_ie2str(int ie);
 143
 144 int iax_ie_append_raw(struct iax_ie_data *ied, unsigned char ie, const void *data, int datalen);
 145 int iax_ie_append_addr(struct iax_ie_data *ied, unsigned char ie, const struct sockaddr_in *sin);
 146 int iax_ie_append_int(struct iax_ie_data *ied, unsigned char ie, unsigned int value);
 147 int iax_ie_append_short(struct iax_ie_data *ied, unsigned char ie, unsigned short value);
 148 int iax_ie_append_str(struct iax_ie_data *ied, unsigned char ie, const char *str);
 149 int iax_ie_append_byte(struct iax_ie_data *ied, unsigned char ie, unsigned char dat);
 150 int iax_ie_append(struct iax_ie_data *ied, unsigned char ie);
 151 int iax_parse_ies(struct iax_ies *ies, unsigned char *data, int datalen);
 152
 153 int iax_get_frames(void);
 154 int iax_get_iframes(void);
 155 int iax_get_oframes(void);
 156
 157 void iax_frame_wrap(struct iax_frame *fr, struct ast_frame *f);
 158 struct iax_frame *iax_frame_new(int direction, int datalen, unsigned int cacheable);
 159 void iax_frame_free(struct iax_frame *fr);
 160 #endif