/**
* @brief - Decoding string line as a status line
*
* @param p_start_line
* @param rtsp_msg_buffer
* @param rtsp_msg_len
*
* @return
*/
static inline rtsp_error_t rtsp_parse_status_line(rtsp_start_line_t *p_start_line,const char *rtsp_msg_buffer, int32_t rtsp_msg_len , const char **endptr){
const char *parse_string = NULL, *end = NULL, *temp = NULL;
rtsp_error_t e_ret_val = RTSP_E_FAILURE;
if(!p_start_line || !rtsp_msg_buffer || rtsp_msg_len <= 0){
return (RTSP_E_INVALID_ARG);
}
/* R[7.1]
* Status-Line = RTSP-Version SP Status-Code SP Reason-Phrase CRLF
* Allowing multiple SP since RFC Text R[7.1] suggests
*/
parse_string = rtsp_msg_buffer;
end = rtsp_msg_buffer + rtsp_msg_len;
/* RTSP-Version */
e_ret_val = rtsp_get_version(&p_start_line->version, parse_string, rtsp_msg_len, &parse_string);
switch (e_ret_val){
case RTSP_E_SUCCESS:
/* Found Version String Start Hence it is status line */
p_start_line->msg_type = RTSP_MSG_RESPONSE;
/* SP */
temp = skip_SP(parse_string, end);
if((NULL == temp) || (temp==parse_string)){
/* No spaces */
e_ret_val = RTSP_E_FAILURE;
}else if(temp == end){
/* Only spaces till end */
e_ret_val = RTSP_E_INCOMPLETE;
break;
}
parse_string = temp;
/* Status-Code */
if((parse_string + RTSP_STATUS_CODE_LEN) <= end){
if(0 == (p_start_line->response.status_code = RTSP_STATUS_CODE(parse_string))){
e_ret_val = RTSP_E_FAILURE;
break;
}
} else {
e_ret_val = RTSP_E_INCOMPLETE;
break;
}
parse_string += RTSP_STATUS_CODE_LEN;
/* SP */
temp = skip_SP(parse_string, end);
if((NULL == temp) || (temp==parse_string)){
/* No spaces */
e_ret_val = RTSP_E_FAILURE;
}else if(temp==end){
/* Only spaces till end */
e_ret_val = RTSP_E_INCOMPLETE;
break;
}
parse_string = temp;
/* Reason-Phrase */
p_start_line->response.reason_phrase = parse_string;
while((parse_string <= end) && is_text(*parse_string))
parse_string++;
;
/* CRLF */
if((parse_string+1) <= end){
if(RTSP_CR == *parse_string++ && RTSP_LF ==*parse_string++){
p_start_line->response.reason_len = (int32_t)((rtsp_msg_buffer - parse_string)+ rtsp_msg_len);
} else {
e_ret_val = RTSP_E_FAILURE;
break;
}
} else {
e_ret_val = RTSP_E_INCOMPLETE;
break;
}
if(endptr)
*endptr = parse_string;
e_ret_val = RTSP_E_SUCCESS;
break;
case RTSP_E_UNSUPPORTED:
/* Version Not supported */
case RTSP_E_FAILURE:
default:
/* Must Be Request-Line */
break;
}
return (e_ret_val);
}
static inline rtsp_error_t rtsp_parse_request_line(rtsp_start_line_t *p_start_line, const char *rtsp_msg_buffer, int32_t rtsp_msg_len, const char **endptr){
const char *parse_string = rtsp_msg_buffer;
const char *end = rtsp_msg_buffer + rtsp_msg_len;
const char *temp = NULL;
rtsp_error_t e_ret_val = RTSP_E_FAILURE;
if(!p_start_line || !rtsp_msg_buffer || rtsp_msg_len <= 0){
return (RTSP_E_INVALID_ARG);
}
/* R[6.1]
* Request-Line = Method SP Request-URI SP RTSP-Version CRLF
* Allowing multiple SP since RFC Text H[5.1] suggests
*/
e_ret_val = rtsp_get_method(&p_start_line->request.method, parse_string, rtsp_msg_len, &parse_string);
if(e_ret_val != RTSP_E_SUCCESS ){
return (e_ret_val);
}
/* Found valid Method Hence it is request line */
p_start_line->msg_type = RTSP_MSG_REQUEST;
/* SP */
temp = skip_SP(parse_string, end);
if((NULL == temp) || (temp==parse_string)){
/* No spaces */
e_ret_val = RTSP_E_FAILURE;
return(e_ret_val);
}else if(temp==end){
/* Only spaces till end */
e_ret_val = RTSP_E_INCOMPLETE;
return(e_ret_val);
}
parse_string = temp;
/* Request-URI */
e_ret_val = rtsp_get_url(&p_start_line->request.url ,parse_string, (rtsp_msg_len - (parse_string - rtsp_msg_buffer)), &parse_string);
if(e_ret_val != RTSP_E_SUCCESS){
ERR_LOG("Failed to parse URI");
return (e_ret_val);
}
/* SP */
temp = skip_SP(parse_string, end);
if((NULL == temp) || (temp==parse_string)){
/* No spaces */
e_ret_val = RTSP_E_FAILURE;
return(e_ret_val);
}else if(temp==end){
/* Only spaces till end */
e_ret_val = RTSP_E_INCOMPLETE;
return(e_ret_val);
}
parse_string = temp;
/* RTSP-Version */
e_ret_val = rtsp_get_version(&p_start_line->version, parse_string, (rtsp_msg_len - (parse_string - rtsp_msg_buffer)) , &parse_string);
if(e_ret_val != RTSP_E_SUCCESS){
return (e_ret_val);
}
/* CRLF */
if((parse_string+2) < end){
if((*parse_string++ == RTSP_CR) && (*parse_string++ == RTSP_LF)){
e_ret_val = RTSP_E_SUCCESS;
} else {
e_ret_val = RTSP_E_FAILURE;
}
} else {
e_ret_val = RTSP_E_INCOMPLETE;
}
if(endptr)
*endptr = parse_string;
return (e_ret_val);
}
static void rtsp_server_handle(struct rtsp_server_request_t *req, void* parser)
{
int major, minor;
const char* uri;
const char* method;
req->parser = parser;
rtsp_get_version(parser, &major, &minor);
if(1 != major && 0 != minor)
{
//505 RTSP Version Not Supported
rtsp_server_reply(req, 505);
return;
}
if(0 != rtsp_get_header_by_name2(parser, "CSeq", (int*)&req->cseq))
{
// 400 Bad Request
rtsp_server_reply(req, 400);
return;
}
uri = rtsp_get_request_uri(parser);
method = rtsp_get_request_method(parser);
switch(*method)
{
case 'o':
case 'O':
if(0 == stricmp("OPTIONS", method))
{
rtsp_server_options(req, parser, uri);
return;
}
break;
case 'd':
case 'D':
if(0 == stricmp("DESCRIBE", method))
{
rtsp_server_describe(req, parser, uri);
return;
}
break;
case 's':
case 'S':
if(0 == stricmp("SETUP", method))
{
rtsp_server_setup(req, parser, uri);
return;
}
break;
case 'p':
case 'P':
if(0 == stricmp("PLAY", method))
{
rtsp_server_play(req, parser, uri);
return;
}
else if(0 == stricmp("PAUSE", method))
{
rtsp_server_pause(req, parser, uri);
return;
}
break;
case 't':
case 'T':
if(0 == stricmp("TEARDOWN", method))
{
rtsp_server_teardown(req, parser, uri);
return;
}
break;
}
// 501 Not implemented
rtsp_server_reply(req, 501);
}