RTSP 消息拼装实例代码 (二)

}
else if(!strcmp(szName, "PAUSE"))
{
cmdFmt =
"PAUSE %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Session: %s\r\n"
"%s"
"%s"
"\r\n";
}
else if(!strcmp(szName, "RECORD"))
{
cmdFmt =
"RECORD %s%s%s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Session: %s\r\n"
"Range: npt=0-\r\n"
"%s"
"%s"
"\r\n";
}
else if(!strcmp(szName, "SET_PARAMETER"))
{
cmdFmt =
"SET_PARAMETER %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Session: %s\r\n"
"%s"
"%s"
"Content-length: %d\r\n\r\n"
"%s: %s\r\n";
}
else if(!strcmp(szName, "GET_PARAMETER"))
{
cmdFmt =
"GET_PARAMETER %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Session: %s\r\n"
"%s"
"%s"
"Content-type: text/parameters\r\n"
"Content-length: %d\r\n\r\n"
"%s\r\n";
}
else if(!strcmp(szName, "TEARDOWN"))
{
cmdFmt =
"TEARDOWN %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Session: %s\r\n"
"%s"
"%s"
"\r\n";
}
else if(!strcmp(szName, "DESCRIBE"))
{
cmdFmt =
"DESCRIBE %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"%s"
"%s"
"%s"
#ifdef SUPPORT_REAL_RTSP
REAL_DESCRIBE_HEADERS
#endif
"\r\n";
}
else if(!strcmp(szName, "ANNOUNCE"))
{
cmdFmt =
"ANNOUNCE %s RTSP/1.0\r\n"
"CSeq: %d\r\n"
"Content-Type: application/sdp\r\n"
"%s"
"Content-length: %d\r\n\r\n"
"%s";
}
else if(!strcmp(szName, "SETUP"))
{
cmdFmt ="SETUP %s"
"CSeq: %d\r\n"
"%s"
"%s"
"%s"
"%s"
"\r\n";
}
str = (char*)cmdFmt;
return str;
}
然后，针对每种消息类型，在做单独的拼装，下面主要介绍Client向Server发送的请求消息：

1.OPTION

[cpp]
#define PP_NAME "User-Agent: rtsp client(v1.0)"
#define PP_CRLF "\r\n"

#define PP_NAME "User-Agent: rtsp client(v1.0)"
#define PP_CRLF "\r\n"
[cpp]
char * GetOptionCmd( char *url )
{
int nlen, iret;
char *ss;
char *s = GetRTSPCmd("OPTIONS");

nlen = strlen(s);
iret = nlen + strlen(url) + strlen(PP_NAME) + 200;
ss = (char*)malloc(iret);

sprintf(ss, s, url, 1, PP_NAME, PP_CRLF);


return ss;
}

char * GetOptionCmd( char *url )
{
int nlen, iret;
char *ss;
char *s = GetRTSPCmd("OPTIONS");

nlen = strlen(s);
iret = nlen + strlen(url) + strlen(PP_NAME) + 200;
ss = (char*)malloc(iret);

sprintf(ss, s, url, 1, PP_NAME, PP_CRLF);

return ss;
}
2.DESCRIBE

[cpp]
char * GetDescribeCmd( char *url )
{
int nlen, iret;
char *ss;
char *s = GetRTSPCmd("DESCRIBE");

nlen = strlen(s);
iret = nlen + strlen(url) + strlen(PP_NAME) + 200;
ss = (char*)malloc(iret);

sprintf(ss, s, url, 2, PP_NAME, PP_CRLF, PP_CRLF);

return ss;
}

char * GetDescribeCmd( char *url )
{
int nlen, iret;
char *ss;
char *s = GetRTSPCmd("DESCRIBE");

nlen = strlen(s);
iret = nlen + strlen(url) + strlen(PP_NAME) + 200;
ss = (char*)malloc(iret);

sprintf(ss, s, url, 2, PP_NAME, PP_CRLF, PP_CRLF);

return ss;
}

3.SETUP

char * GetSetupCmd( char *url , int port1, int port2)
{
int nlen, iret;
char *ss;
char *s = GetRTSPCmd("SETUP");

nlen = strlen(s);
iret = nlen + strlen(url) + strlen(PP_NAME) + 200;
ss = (char*)malloc(iret);
char buf[128] = {0};
c