Thu Oct 11 06:42:10 2012

Asterisk developer's documentation


udptl.h

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00001 /*
00002  * Asterisk -- A telephony toolkit for Linux.
00003  *
00004  * UDPTL support for T.38
00005  * 
00006  * Copyright (C) 2005, Steve Underwood, partly based on RTP code which is
00007  * Copyright (C) 1999-2004, Digium, Inc.
00008  *
00009  * Steve Underwood <steveu@coppice.org>
00010  *
00011  * This program is free software, distributed under the terms of
00012  * the GNU General Public License
00013  *
00014  * A license has been granted to Digium (via disclaimer) for the use of
00015  * this code.
00016  */
00017 
00018 #ifndef _ASTERISK_UDPTL_H
00019 #define _ASTERISK_UDPTL_H
00020 
00021 #include "asterisk/frame.h"
00022 #include "asterisk/io.h"
00023 #include "asterisk/sched.h"
00024 #include "asterisk/channel.h"
00025 
00026 #include <netinet/in.h>
00027 
00028 enum
00029 {
00030     UDPTL_ERROR_CORRECTION_NONE,
00031     UDPTL_ERROR_CORRECTION_FEC,
00032     UDPTL_ERROR_CORRECTION_REDUNDANCY
00033 };
00034 
00035 #if defined(__cplusplus) || defined(c_plusplus)
00036 extern "C" {
00037 #endif
00038 
00039 struct ast_udptl_protocol {
00040    /* Get UDPTL struct, or NULL if unwilling to transfer */
00041    struct ast_udptl *(*get_udptl_info)(struct ast_channel *chan);
00042    /* Set UDPTL peer */
00043    int (* const set_udptl_peer)(struct ast_channel *chan, struct ast_udptl *peer);
00044    const char * const type;
00045    struct ast_udptl_protocol *next;
00046 };
00047 
00048 struct ast_udptl;
00049 
00050 typedef int (*ast_udptl_callback)(struct ast_udptl *udptl, struct ast_frame *f, void *data);
00051 
00052 struct ast_udptl *ast_udptl_new(struct sched_context *sched, struct io_context *io, int callbackmode);
00053 
00054 struct ast_udptl *ast_udptl_new_with_bindaddr(struct sched_context *sched, struct io_context *io, int callbackmode, struct in_addr in);
00055 
00056 void ast_udptl_set_peer(struct ast_udptl *udptl, struct sockaddr_in *them);
00057 
00058 void ast_udptl_get_peer(struct ast_udptl *udptl, struct sockaddr_in *them);
00059 
00060 void ast_udptl_get_us(struct ast_udptl *udptl, struct sockaddr_in *us);
00061 
00062 void ast_udptl_destroy(struct ast_udptl *udptl);
00063 
00064 void ast_udptl_reset(struct ast_udptl *udptl);
00065 
00066 void ast_udptl_set_callback(struct ast_udptl *udptl, ast_udptl_callback callback);
00067 
00068 void ast_udptl_set_data(struct ast_udptl *udptl, void *data);
00069 
00070 int ast_udptl_write(struct ast_udptl *udptl, struct ast_frame *f);
00071 
00072 struct ast_frame *ast_udptl_read(struct ast_udptl *udptl);
00073 
00074 int ast_udptl_fd(struct ast_udptl *udptl);
00075 
00076 int ast_udptl_settos(struct ast_udptl *udptl, int tos);
00077 
00078 void ast_udptl_set_m_type(struct ast_udptl* udptl, int pt);
00079 
00080 void ast_udptl_set_udptlmap_type(struct ast_udptl* udptl, int pt,
00081           char* mimeType, char* mimeSubtype);
00082 
00083 int ast_udptl_lookup_code(struct ast_udptl* udptl, int isAstFormat, int code);
00084 
00085 void ast_udptl_offered_from_local(struct ast_udptl* udptl, int local);
00086 
00087 int ast_udptl_get_error_correction_scheme(struct ast_udptl* udptl);
00088 
00089 void ast_udptl_set_error_correction_scheme(struct ast_udptl* udptl, int ec);
00090 
00091 int ast_udptl_get_local_max_datagram(struct ast_udptl* udptl);
00092 
00093 void ast_udptl_set_local_max_datagram(struct ast_udptl* udptl, int max_datagram);
00094 
00095 int ast_udptl_get_far_max_datagram(struct ast_udptl* udptl);
00096 
00097 void ast_udptl_set_far_max_datagram(struct ast_udptl* udptl, int max_datagram);
00098 
00099 void ast_udptl_get_current_formats(struct ast_udptl* udptl,
00100               int* astFormats, int* nonAstFormats);
00101 
00102 void ast_udptl_setnat(struct ast_udptl *udptl, int nat);
00103 
00104 int ast_udptl_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc);
00105 
00106 int ast_udptl_proto_register(struct ast_udptl_protocol *proto);
00107 
00108 void ast_udptl_proto_unregister(struct ast_udptl_protocol *proto);
00109 
00110 void ast_udptl_stop(struct ast_udptl *udptl);
00111 
00112 void ast_udptl_init(void);
00113 
00114 void ast_udptl_reload(void);
00115 
00116 #if defined(__cplusplus) || defined(c_plusplus)
00117 }
00118 #endif
00119 
00120 #endif

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