2 * Asterisk -- A telephony toolkit for Linux.
4 * UDPTL support for T.38
6 * Copyright (C) 2005, Steve Underwood, partly based on RTP code which is
7 * Copyright (C) 1999-2004, Digium, Inc.
9 * Steve Underwood <steveu@coppice.org>
11 * This program is free software, distributed under the terms of
12 * the GNU General Public License
14 * A license has been granted to Digium (via disclaimer) for the use of
19 * \brief UDPTL support for T.38
20 * \author Steve Underwood <steveu@coppice.org>
22 * \todo add doxygen documentation to this file!
26 #ifndef _ASTERISK_UDPTL_H
27 #define _ASTERISK_UDPTL_H
29 #include "asterisk/network.h"
30 #include "asterisk/frame.h"
31 #include "asterisk/io.h"
32 #include "asterisk/sched.h"
33 #include "asterisk/channel.h"
34 #include "asterisk/netsock2.h"
37 enum ast_t38_ec_modes {
38 UDPTL_ERROR_CORRECTION_NONE,
39 UDPTL_ERROR_CORRECTION_FEC,
40 UDPTL_ERROR_CORRECTION_REDUNDANCY
43 #if defined(__cplusplus) || defined(c_plusplus)
47 struct ast_udptl_protocol {
48 /*! \brief Get UDPTL struct, or NULL if unwilling to transfer */
49 struct ast_udptl *(*get_udptl_info)(struct ast_channel *chan);
50 /*! \brief Set UDPTL peer */
51 int (* const set_udptl_peer)(struct ast_channel *chan, struct ast_udptl *peer);
52 const char * const type;
53 AST_RWLIST_ENTRY(ast_udptl_protocol) list;
58 typedef int (*ast_udptl_callback)(struct ast_udptl *udptl, struct ast_frame *f, void *data);
60 struct ast_udptl *ast_udptl_new_with_bindaddr(struct sched_context *sched, struct io_context *io, int callbackmode, struct ast_sockaddr *in);
63 * \brief Associates a character string 'tag' with a UDPTL session.
64 * \param udptl The UDPTL session.
65 * \param format printf-style format string used to construct the tag
67 * This function formats a tag for the specified UDPTL
68 * session, so that any log messages generated by the UDPTL stack
69 * related to that session will include the tag and the reader of
70 * the messages will be able to identify which endpoint caused them
75 void __attribute__((format(printf, 2, 3))) ast_udptl_set_tag(struct ast_udptl *udptl, const char *format, ...);
77 void ast_udptl_set_peer(struct ast_udptl *udptl, const struct ast_sockaddr *them);
79 void ast_udptl_get_peer(const struct ast_udptl *udptl, struct ast_sockaddr *them);
81 void ast_udptl_get_us(const struct ast_udptl *udptl, struct ast_sockaddr *us);
83 void ast_udptl_destroy(struct ast_udptl *udptl);
85 void ast_udptl_reset(struct ast_udptl *udptl);
87 void ast_udptl_set_callback(struct ast_udptl *udptl, ast_udptl_callback callback);
89 void ast_udptl_set_data(struct ast_udptl *udptl, void *data);
91 int ast_udptl_write(struct ast_udptl *udptl, struct ast_frame *f);
93 struct ast_frame *ast_udptl_read(struct ast_udptl *udptl);
95 int ast_udptl_fd(const struct ast_udptl *udptl);
97 int ast_udptl_setqos(struct ast_udptl *udptl, unsigned int tos, unsigned int cos);
99 void ast_udptl_set_m_type(struct ast_udptl *udptl, unsigned int pt);
101 void ast_udptl_set_udptlmap_type(struct ast_udptl *udptl, unsigned int pt,
102 char *mimeType, char *mimeSubtype);
104 enum ast_t38_ec_modes ast_udptl_get_error_correction_scheme(const struct ast_udptl *udptl);
106 void ast_udptl_set_error_correction_scheme(struct ast_udptl *udptl, enum ast_t38_ec_modes ec);
108 void ast_udptl_set_local_max_ifp(struct ast_udptl *udptl, unsigned int max_ifp);
111 * \brief retrieves local_max_datagram.
113 * \retval positive value representing max datagram size.
114 * \retval 0 if no value is present
116 unsigned int ast_udptl_get_local_max_datagram(struct ast_udptl *udptl);
119 * \brief sets far max datagram size. If max_datagram is = 0, the far max datagram
120 * size is set to a default value.
122 void ast_udptl_set_far_max_datagram(struct ast_udptl *udptl, unsigned int max_datagram);
124 unsigned int ast_udptl_get_far_max_datagram(const struct ast_udptl *udptl);
127 * \brief retrieves far max ifp
129 * \retval positive value representing max ifp size
130 * \retval 0 if no value is present
132 unsigned int ast_udptl_get_far_max_ifp(struct ast_udptl *udptl);
134 void ast_udptl_setnat(struct ast_udptl *udptl, int nat);
136 int ast_udptl_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags,
137 struct ast_frame **fo, struct ast_channel **rc);
139 int ast_udptl_proto_register(struct ast_udptl_protocol *proto);
141 void ast_udptl_proto_unregister(struct ast_udptl_protocol *proto);
143 void ast_udptl_stop(struct ast_udptl *udptl);
145 void ast_udptl_init(void);
148 * \version 1.6.1 return changed to int
150 int ast_udptl_reload(void);
152 #if defined(__cplusplus) || defined(c_plusplus)