| c732d49e |
/*
* Copyright (C) 2010-2015 Mamadou Diop.
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tsdp_header_M.c
* @brief SDP "m=" header (Media Descriptions).
*
*/
#include "tinysdp/headers/tsdp_header_M.h"
#include "tsk_debug.h"
#include "tsk_memory.h"
#include "tsk_string.h"
#include <string.h>
/***********************************
* Ragel state machine.
*/
%%{
machine tsdp_machine_parser_header_M;
# Includes
include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
action tag{
tag_start = p;
}
action parse_media{
TSK_PARSER_SET_STRING(hdr_M->media);
}
action parse_port{
TSK_PARSER_SET_UINT(hdr_M->port);
}
action parse_nports{
TSK_PARSER_SET_UINT(hdr_M->nports);
}
action parse_proto{
TSK_PARSER_SET_STRING(hdr_M->proto);
}
action parse_fmt{
TSK_PARSER_ADD_STRING(hdr_M->FMTs);
}
media = token>tag %parse_media;
port = DIGIT+>tag %parse_port;
nports = DIGIT+>tag %parse_port;
proto = (token ("/" token)*)>tag %parse_proto;
fmt = token>tag %parse_fmt;
#// media SP port ["/" integer] SP proto 1*(SP fmt)
M = 'm' SP* "=" SP*<: media SP port ("/" nports)? SP proto (SP fmt)* (SP{1})?; # The last SP is for buggy browsers (e.g. Nightly 20.0a1 => "m=application 51713 SCTP/DTLS 5000 \r\n")
# Entry point
main := M :>CRLF?;
}%%
tsdp_header_M_t* tsdp_header_M_create(const char* media, uint32_t port, const char* proto)
{
return tsk_object_new(TSDP_HEADER_M_VA_ARGS(media, port, proto));
}
tsdp_header_M_t* tsdp_header_M_create_null()
{
return tsdp_header_M_create(tsk_null, 0, tsk_null);
}
tsdp_fmt_t* tsdp_fmt_create(const char* fmt)
{
return tsk_object_new(TSDP_FMT_VA_ARGS(fmt));
}
int tsdp_header_M_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
{
if(header){
const tsdp_header_M_t *M = (const tsdp_header_M_t *)header;
const tsk_list_item_t* item;
tsk_istr_t nports;
tsk_itoa(M->nports, &nports);
/* IMPORTANT: Keep the order.
m= (media name and transport address)
i=* (media title)
c=* (connection information -- optional if included at
session level)
b=* (zero or more bandwidth information lines)
k=* (encryption key)
a=* (zero or more media attribute lines)
*/
tsk_buffer_append_2(output, "%s %u%s%s %s",
M->media,
M->port,
M->nports ? "/" : "",
M->nports ? nports : "",
M->proto
);
// FMTs
tsk_list_foreach(item, M->FMTs){
tsk_buffer_append_2(output, " %s", TSDP_FMT_STR(item->data));
}
tsk_buffer_append(output, "\r\n", 2); // close the "m=" line.
// i=* (media title)
if(M->I){
tsdp_header_serialize(TSDP_HEADER(M->I), output);
}
// c=* (connection information -- optional if included at session level)
if(M->C){
tsdp_header_serialize(TSDP_HEADER(M->C), output);
}
// b=* (zero or more bandwidth information lines)
if(M->Bandwidths){
tsk_list_foreach(item, M->Bandwidths){
tsdp_header_serialize(TSDP_HEADER(item->data), output);
}
}
// k=* (encryption key)
if(M->K){
tsdp_header_serialize(TSDP_HEADER(M->K), output);
}
// a=* (zero or more media attribute lines)
if(M->Attributes){
tsk_list_foreach(item, M->Attributes){
tsdp_header_serialize(TSDP_HEADER(item->data), output);
}
}
return 0;
}
return -1;
}
tsdp_header_t* tsdp_header_M_clone(const tsdp_header_t* header)
{
if(header){
const tsdp_header_M_t *M = (const tsdp_header_M_t *)header;
tsdp_header_M_t* clone;
const tsk_list_item_t* item;
if((clone = tsdp_header_M_create(M->media, M->port, M->proto))){
clone->nports = M->nports;
// Formats
tsk_list_foreach(item, M->FMTs){
tsk_string_t* string = tsk_string_create(TSK_STRING_STR(item->data));
tsk_list_push_back_data(clone->FMTs, (void**)&string);
}
// I
clone->I = (tsdp_header_I_t*) (M->I ? TSDP_HEADER(M->I)->clone(TSDP_HEADER(M->I)) : tsk_null);
// C
clone->C = (tsdp_header_C_t*) (M->C ? TSDP_HEADER(M->C)->clone(TSDP_HEADER(M->C)) : tsk_null);
// Bandwidths
tsk_list_foreach(item, M->Bandwidths){
tsdp_header_t* B;
if(!clone->Bandwidths){
clone->Bandwidths = tsk_list_create();
}
B = ((tsdp_header_t*)item->data)->clone((tsdp_header_t*)item->data);
tsk_list_push_back_data(clone->Bandwidths, (void**)&B);
}
// K
clone->K = (tsdp_header_K_t*) (M->K ? TSDP_HEADER(M->K)->clone(TSDP_HEADER(M->K)) : tsk_null);
// Attributes
tsk_list_foreach(item, M->Attributes){
tsdp_header_t* A;
if(!clone->Attributes){
clone->Attributes = tsk_list_create();
}
A = ((tsdp_header_t*)item->data)->clone((tsdp_header_t*)item->data);
tsk_list_push_back_data(clone->Attributes, (void**)&A);
}
}
return TSDP_HEADER(clone);
}
return tsk_null;
}
tsdp_header_M_t *tsdp_header_M_parse(const char *data, tsk_size_t size)
{
int cs = 0;
const char *p = data;
const char *pe = p + size;
const char *eof = pe;
tsdp_header_M_t *hdr_M = tsdp_header_M_create_null();
const char *tag_start = tsk_null;
TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
%%write data;
(void)(tsdp_machine_parser_header_M_first_final);
(void)(tsdp_machine_parser_header_M_error);
(void)(tsdp_machine_parser_header_M_en_main);
%%write init;
%%write exec;
TSK_RAGEL_DISABLE_WARNINGS_END()
if( cs < %%{ write first_final; }%% ){
TSK_DEBUG_ERROR("Failed to parse \"m=\" header.");
TSK_OBJECT_SAFE_FREE(hdr_M);
}
return hdr_M;
}
// for A headers, use "tsdp_header_A_removeAll_by_field()"
int tsdp_header_M_remove(tsdp_header_M_t* self, tsdp_header_type_t type)
{
switch(type){
case tsdp_htype_I:
{
TSK_OBJECT_SAFE_FREE(self->I);
break;
}
case tsdp_htype_C:
{
TSK_OBJECT_SAFE_FREE(self->C);
break;
}
case tsdp_htype_B:
{
if(self->Bandwidths){
tsk_list_clear_items(self->Bandwidths);
}
break;
}
case tsdp_htype_K:
{
TSK_OBJECT_SAFE_FREE(self->K);
break;
}
}
return 0;
}
int tsdp_header_M_add(tsdp_header_M_t* self, const tsdp_header_t* header)
{
if(!self || !header){
return -1;
}
switch(header->type){
case tsdp_htype_I:
{
TSK_OBJECT_SAFE_FREE(self->I);
self->I = tsk_object_ref((void*)header);
break;
}
case tsdp_htype_C:
{
TSK_OBJECT_SAFE_FREE(self->C);
self->C = tsk_object_ref((void*)header);
break;
}
case tsdp_htype_B:
{
tsdp_header_t* B = tsk_object_ref((void*)header);
if(!self->Bandwidths){
self->Bandwidths = tsk_list_create();
}
tsk_list_push_back_data(self->Bandwidths, (void**)&B);
break;
}
case tsdp_htype_K:
{
TSK_OBJECT_SAFE_FREE(self->K);
self->K = tsk_object_ref((void*)header);
break;
}
case tsdp_htype_A:
{
tsdp_header_t* A = tsk_object_ref((void*)header);
if(!self->Attributes){
self->Attributes = tsk_list_create();
}
tsk_list_push_back_data(self->Attributes, (void**)&A);
break;
}
}
return 0;
}
int tsdp_header_M_add_headers(tsdp_header_M_t* self, ...)
{
const tsk_object_def_t* objdef;
tsdp_header_t *header;
tsdp_fmt_t* fmt;
va_list ap;
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
va_start(ap, self);
while((objdef = va_arg(ap, const tsk_object_def_t*))){
if(objdef == tsdp_fmt_def_t){
if((fmt = tsk_object_new_2(objdef, &ap))){
tsk_list_push_back_data(self->FMTs, (void**)&fmt);
}
}
else{
if((header = tsk_object_new_2(objdef, &ap))){
tsdp_header_M_add(self, header);
TSK_OBJECT_SAFE_FREE(header);
}
}
}
va_end(ap);
return 0;
}
int tsdp_header_M_add_headers_2(tsdp_header_M_t* self, const tsdp_headers_L_t* headers)
{
const tsk_list_item_t* item;
if(!self || !headers){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_list_foreach(item, headers){
tsdp_header_M_add(self, item->data);
}
return 0;
}
int tsdp_header_M_add_fmt(tsdp_header_M_t* self, const char* fmt)
{
tsdp_fmt_t* _fmt;
if(!self || tsk_strnullORempty(fmt)){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if((_fmt = tsdp_fmt_create(fmt))){
tsk_list_push_back_data(self->FMTs, (void**)&_fmt);
return 0;
}
else{
TSK_DEBUG_ERROR("Failed to create fmt object");
return -2;
}
}
int tsdp_header_M_remove_fmt(tsdp_header_M_t* self, const char* fmt)
{
const tsk_list_item_t* itemM;
const tsdp_fmt_t* _fmt;
char* fmt_plus_space = tsk_null;
tsk_size_t fmt_plus_space_len;
if(!self || tsk_strnullORempty(fmt)){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_sprintf(&fmt_plus_space, "%s ", fmt);
if((fmt_plus_space_len = tsk_strlen(fmt_plus_space))){
tsk_list_foreach(itemM, self->FMTs){
if(!(_fmt = (const tsdp_fmt_t*)itemM->data)){
continue;
}
if(tsk_striequals(_fmt->value, fmt)){
// remove all A headers using this attribute
const tsdp_header_A_t* A;
const tsk_list_item_t* itemA;
removeAttributes:
tsk_list_foreach(itemA, self->Attributes){
if(!(A = (const tsdp_header_A_t*)itemA->data)){
continue;
}
if(tsk_strindexOf(A->value, fmt_plus_space_len, fmt_plus_space) == 0){
// Guard to be sure we know what to remove. For example:
// tsdp_header_M_remove_fmt(self, 0) would remove both
// a=rtpmap:0 PCMU/8000/1
// a=crypto:0 AES_CM_128_HMAC_SHA1_32 inline:Gi8s25tDKDnd/xORJ/ZtRWWC1drVbax5Ve4ftCWd
// and cause issue 115: https://code.google.com/p/webrtc2sip/issues/detail?id=115
if(!tsk_striequals(A->field, "crypto")){
tsk_list_remove_item(self->Attributes, (tsk_list_item_t*)itemA);
goto removeAttributes;
}
}
}
tsk_list_remove_item(self->FMTs, (tsk_list_item_t*)itemM);
break;
}
}
}
TSK_FREE(fmt_plus_space);
return 0;
}
tsk_bool_t tsdp_header_M_have_fmt(tsdp_header_M_t* self, const char* fmt)
{
if(self &&! tsk_strnullORempty(fmt)){
const tsk_list_item_t* item;
const tsdp_fmt_t* _fmt;
tsk_list_foreach(item, self->FMTs){
if(!(_fmt = (const tsdp_fmt_t*)item->data)){
continue;
}
if(tsk_striequals(_fmt->value, fmt)){
return tsk_true;
}
}
}
return tsk_false;
}
const tsdp_header_A_t* tsdp_header_M_findA_at(const tsdp_header_M_t* self, const char* field, tsk_size_t index)
{
const tsk_list_item_t *item;
tsk_size_t pos = 0;
const tsdp_header_A_t* A;
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return tsk_null;
}
tsk_list_foreach(item, self->Attributes){
if(!(A = item->data)){
continue;
}
if(tsk_strequals(A->field, field)){
if(pos++ >= index){
return A;
}
}
}
return tsk_null;
}
const tsdp_header_A_t* tsdp_header_M_findA(const tsdp_header_M_t* self, const char* field)
{
return tsdp_header_M_findA_at(self, field, 0);
}
char* tsdp_header_M_getAValue(const tsdp_header_M_t* self, const char* field, const char* fmt)
{
char *value = tsk_null; /* e.g. AMR-WB/16000 */
tsk_size_t i = 0, fmt_len, A_len;
int indexof;
const tsdp_header_A_t* A;
fmt_len = tsk_strlen(fmt);
if(!self || !fmt_len || fmt_len > 3/*'0-255' or '*'*/){
TSK_DEBUG_ERROR("Invalid parameter");
return tsk_null;
}
/* find "a=rtpmap" */
while((A = tsdp_header_M_findA_at(self, field, i++))){
/* A->value would be: "98 AMR-WB/16000" */
if((A_len = tsk_strlen(A->value)) < (fmt_len + 1/*space*/)){
continue;
}
if((indexof = tsk_strindexOf(A->value, A_len, fmt)) == 0 && (A->value[fmt_len] == ' ')){
value = tsk_strndup(&A->value[fmt_len+1], (A_len-(fmt_len+1)));
break;
}
}
return value;
}
/* as per 3GPP TS 34.610 */
int tsdp_header_M_hold(tsdp_header_M_t* self, tsk_bool_t local)
{
const tsdp_header_A_t* a;
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if((a = tsdp_header_M_findA(self, local ? "recvonly" : "sendonly"))){
// an "inactive" SDP attribute if the stream was previously set to "recvonly" media stream
tsk_strupdate(&(TSDP_HEADER_A(a)->field), local ? "inactive" : "recvonly");
}
else if((a = tsdp_header_M_findA(self, "sendrecv"))){
// a "sendonly" SDP attribute if the stream was previously set to "sendrecv" media stream
tsk_strupdate(&(TSDP_HEADER_A(a)->field), local ? "sendonly" : "recvonly");
}
else{
// default value is sendrecv. hold on default --> sendonly
if(!(a = tsdp_header_M_findA(self, local ? "sendonly" : "recvonly")) && !(a = tsdp_header_M_findA(self, "inactive"))){
tsdp_header_A_t* newA;
if((newA = tsdp_header_A_create(local ? "sendonly" : "recvonly", tsk_null))){
tsdp_header_M_add(self, TSDP_HEADER_CONST(newA));
TSK_OBJECT_SAFE_FREE(newA);
}
}
}
return 0;
}
/* as per 3GPP TS 34.610 */
int tsdp_header_M_set_holdresume_att(tsdp_header_M_t* self, tsk_bool_t lo_held, tsk_bool_t ro_held)
{
const tsdp_header_A_t* A;
static const char* hold_resume_atts[2][2] =
{
{"sendrecv", "recvonly"},
{"sendonly", "inactive"},
};
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if((A = tsdp_header_M_findA(self, "sendrecv")) || (A = tsdp_header_M_findA(self, "sendonly")) || (A = tsdp_header_M_findA(self, "recvonly")) || (A = tsdp_header_M_findA(self, "inactive"))){
tsk_strupdate(&(TSDP_HEADER_A(A)->field), hold_resume_atts[lo_held & 1][ro_held & 1]);
}
else{
tsdp_header_A_t* newA;
if((newA = tsdp_header_A_create(hold_resume_atts[lo_held & 1][ro_held & 1], tsk_null))){
tsdp_header_M_add(self, TSDP_HEADER_CONST(newA));
TSK_OBJECT_SAFE_FREE(newA);
}
}
return 0;
}
const char* tsdp_header_M_get_holdresume_att(const tsdp_header_M_t* self)
{
static const char* hold_resume_atts[4] = {"sendrecv"/*first because most likely to be present*/, "recvonly", "sendonly", "inactive"};
static tsk_size_t hold_resume_atts_count = sizeof(hold_resume_atts)/sizeof(hold_resume_atts[0]);
tsk_size_t i;
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return hold_resume_atts[0];
}
for(i = 0; i < hold_resume_atts_count; ++i){
if(tsdp_header_M_findA(self, hold_resume_atts[i])){
return hold_resume_atts[i];
}
}
return hold_resume_atts[0];
}
tsk_bool_t tsdp_header_M_is_held(const tsdp_header_M_t* self, tsk_bool_t local)
{
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return tsk_false;
}
/* both cases */
if(tsdp_header_M_findA(self, "inactive")){
return tsk_true;
}
if(local){
return tsdp_header_M_findA(self, "recvonly") ? tsk_true : tsk_false;
}
else{
return tsdp_header_M_findA(self, "sendonly") ? tsk_true : tsk_false;
}
}
/* as per 3GPP TS 34.610 */
int tsdp_header_M_resume(tsdp_header_M_t* self, tsk_bool_t local)
{
const tsdp_header_A_t* a;
if(!self){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if((a = tsdp_header_M_findA(self, "inactive"))){
// a "recvonly" SDP attribute if the stream was previously an inactive media stream
tsk_strupdate(&(TSDP_HEADER_A(a)->field), local ? "recvonly" : "sendonly");
}
else if((a = tsdp_header_M_findA(self, local ? "sendonly" : "recvonly"))){
// a "sendrecv" SDP attribute if the stream was previously a sendonly media stream, or the attribute may be omitted, since sendrecv is the default
tsk_strupdate(&(TSDP_HEADER_A(a)->field), "sendrecv");
}
return 0;
}
//
//int tsdp_header_M_set(tsdp_header_M_t* self, ...)
//{
// int ret = -1;
// va_list params;
// int type;
//
// va_start(params, self);
//
// if(!m){
// goto bail;
// }
//
// while((type=va_arg(params, int))){
// switch(type){
// case 0x01: /* FMT */
// {
// tsk_string_t* fmt = tsk_string_create(va_arg(values, const char *));
// if(fmt){
// tsk_list_push_back_data(sefl->FMTs, (void**)&fmt);
// }
// break;
// }
// case 0x02: /* A */
// {
// tsdp_header_A_t* A = tsdp_header_A_create(va_arg(values, const char *), va_arg(values, const char *));
// if(A){
// if(!M->Attributes){
// M->Attributes = tsk_list_create();
// }
// tsk_list_push_back_data(M->Attributes, (void**)&A);
// }
// break;
// }
// }
// }
//
//bail:
// va_end(params);
// return ret;
//}
//========================================================
// M header object definition
//
static tsk_object_t* tsdp_header_M_ctor(tsk_object_t *self, va_list * app)
{
tsdp_header_M_t *M = self;
if(M){
TSDP_HEADER(M)->type = tsdp_htype_M;
TSDP_HEADER(M)->tostring = tsdp_header_M_tostring;
TSDP_HEADER(M)->clone = tsdp_header_M_clone;
TSDP_HEADER(M)->rank = TSDP_HTYPE_M_RANK;
M->FMTs = tsk_list_create(); // Because there is at least one fmt.
M->media = tsk_strdup(va_arg(*app, const char*));
M->port = va_arg(*app, uint32_t);
M->proto = tsk_strdup(va_arg(*app, const char*));
}
else{
TSK_DEBUG_ERROR("Failed to create new M header.");
}
return self;
}
static tsk_object_t* tsdp_header_M_dtor(tsk_object_t *self)
{
tsdp_header_M_t *M = self;
if(M){
TSK_FREE(M->media);
TSK_FREE(M->proto);
TSK_OBJECT_SAFE_FREE(M->FMTs);
TSK_OBJECT_SAFE_FREE(M->I);
TSK_OBJECT_SAFE_FREE(M->C);
TSK_OBJECT_SAFE_FREE(M->Bandwidths);
TSK_OBJECT_SAFE_FREE(M->K);
TSK_OBJECT_SAFE_FREE(M->Attributes);
}
else{
TSK_DEBUG_ERROR("Null M header.");
}
return self;
}
static int tsdp_header_M_cmp(const tsk_object_t *obj1, const tsk_object_t *obj2)
{
if(obj1 && obj2){
return tsdp_header_rank_cmp(obj1, obj2);
}
else{
return -1;
}
}
static const tsk_object_def_t tsdp_header_M_def_s =
{
sizeof(tsdp_header_M_t),
tsdp_header_M_ctor,
tsdp_header_M_dtor,
tsdp_header_M_cmp
};
const tsk_object_def_t *tsdp_header_M_def_t = &tsdp_header_M_def_s; |