include/asterisk/udptl.h

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * UDPTL support for T.38
   5  *
   6  * Copyright (C) 2005, Steve Underwood, partly based on RTP code which is
   7  * Copyright (C) 1999-2004, Digium, Inc.
   8  *
   9  * Steve Underwood <steveu@coppice.org>
  10  *
  11  * This program is free software, distributed under the terms of
  12  * the GNU General Public License
  13  *
  14  * A license has been granted to Digium (via disclaimer) for the use of
  15  * this code.
  16  */
  17
  18 #ifndef _ASTERISK_UDPTL_H
  19 #define _ASTERISK_UDPTL_H
  20
  21 #include "asterisk/frame.h"
  22 #include "asterisk/io.h"
  23 #include "asterisk/sched.h"
  24 #include "asterisk/channel.h"
  25
  26 #include <netinet/in.h>
  27
  28 enum
  29 {
  30     UDPTL_ERROR_CORRECTION_NONE,
  31     UDPTL_ERROR_CORRECTION_FEC,
  32     UDPTL_ERROR_CORRECTION_REDUNDANCY
  33 };
  34
  35 #if defined(__cplusplus) || defined(c_plusplus)
  36 extern "C" {
  37 #endif
  38
  39 struct ast_udptl_protocol {
  40         /* Get UDPTL struct, or NULL if unwilling to transfer */
  41         struct ast_udptl *(*get_udptl_info)(struct ast_channel *chan);
  42         /* Set UDPTL peer */
  43         int (* const set_udptl_peer)(struct ast_channel *chan, struct ast_udptl *peer);
  44         const char * const type;
  45         struct ast_udptl_protocol *next;
  46 };
  47
  48 struct ast_udptl;
  49
  50 typedef int (*ast_udptl_callback)(struct ast_udptl *udptl, struct ast_frame *f, void *data);
  51
  52 struct ast_udptl *ast_udptl_new(struct sched_context *sched, struct io_context *io, int callbackmode);
  53
  54 struct ast_udptl *ast_udptl_new_with_bindaddr(struct sched_context *sched, struct io_context *io, int callbackmode, struct in_addr in);
  55
  56 void ast_udptl_set_peer(struct ast_udptl *udptl, struct sockaddr_in *them);
  57
  58 void ast_udptl_get_peer(struct ast_udptl *udptl, struct sockaddr_in *them);
  59
  60 void ast_udptl_get_us(struct ast_udptl *udptl, struct sockaddr_in *us);
  61
  62 void ast_udptl_destroy(struct ast_udptl *udptl);
  63
  64 void ast_udptl_reset(struct ast_udptl *udptl);
  65
  66 void ast_udptl_set_callback(struct ast_udptl *udptl, ast_udptl_callback callback);
  67
  68 void ast_udptl_set_data(struct ast_udptl *udptl, void *data);
  69
  70 int ast_udptl_write(struct ast_udptl *udptl, struct ast_frame *f);
  71
  72 struct ast_frame *ast_udptl_read(struct ast_udptl *udptl);
  73
  74 int ast_udptl_fd(struct ast_udptl *udptl);
  75
  76 int ast_udptl_settos(struct ast_udptl *udptl, int tos);
  77
  78 void ast_udptl_set_m_type(struct ast_udptl* udptl, int pt);
  79
  80 void ast_udptl_set_udptlmap_type(struct ast_udptl* udptl, int pt,
  81                          char* mimeType, char* mimeSubtype);
  82
  83 int ast_udptl_lookup_code(struct ast_udptl* udptl, int isAstFormat, int code);
  84
  85 void ast_udptl_offered_from_local(struct ast_udptl* udptl, int local);
  86
  87 int ast_udptl_get_error_correction_scheme(struct ast_udptl* udptl);
  88
  89 void ast_udptl_set_error_correction_scheme(struct ast_udptl* udptl, int ec);
  90
  91 int ast_udptl_get_local_max_datagram(struct ast_udptl* udptl);
  92
  93 void ast_udptl_set_local_max_datagram(struct ast_udptl* udptl, int max_datagram);
  94
  95 int ast_udptl_get_far_max_datagram(struct ast_udptl* udptl);
  96
  97 void ast_udptl_set_far_max_datagram(struct ast_udptl* udptl, int max_datagram);
  98
  99 void ast_udptl_get_current_formats(struct ast_udptl* udptl,
 100                              int* astFormats, int* nonAstFormats);
 101
 102 void ast_udptl_setnat(struct ast_udptl *udptl, int nat);
 103
 104 int ast_udptl_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
 105
 106 int ast_udptl_proto_register(struct ast_udptl_protocol *proto);
 107
 108 void ast_udptl_proto_unregister(struct ast_udptl_protocol *proto);
 109
 110 void ast_udptl_stop(struct ast_udptl *udptl);
 111
 112 void ast_udptl_init(void);
 113
 114 void ast_udptl_reload(void);
 115
 116 #if defined(__cplusplus) || defined(c_plusplus)
 117 }
 118 #endif
 119
 120 #endif