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rtsp_msg.c
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/*************************************************************************
> File Name: rtsp_msg.c
> Author: bxq
> Mail: [email protected]
> Created Time: Friday, December 11, 2015 AM05:02:48 CST
************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include "comm.h"
#include "rtsp_msg.h"
void *rtsp_mem_alloc (int size)
{
if (size > 0)
return calloc(1, size);
return NULL;
}
void rtsp_mem_free (void *ptr)
{
if (ptr)
free(ptr);
}
void *rtsp_mem_dup (const void *ptr, int size)
{
void *ptr1 = calloc(1, size);
if (ptr1 && ptr)
memcpy(ptr1, ptr, size);
return ptr1;
}
char *rtsp_str_dup (const char *str)
{
int len = strlen(str);
char *str1 = (char*) calloc(1, len + 1);
if (str1 && str)
memcpy(str1, str, len);
return str1;
}
#define ARRAY_SIZE(_arr) (sizeof(_arr)/sizeof(_arr[0]))
typedef struct __rtsp_msg_int2str_tbl_s
{
int intval;
int strsiz;
const char *strval;
} rtsp_msg_int2str_tbl_s;
static const char *rtsp_msg_int2str (const rtsp_msg_int2str_tbl_s *tbl, int num, int intval)
{
int i;
for (i = 0; i < num; i++) {
if (intval == tbl[i].intval)
return tbl[i].strval;
}
return tbl[num-1].strval;
}
static int rtsp_msg_str2int (const rtsp_msg_int2str_tbl_s *tbl, int num, const char *str)
{
int i;
for (i = 0; i < num; i++) {
if (strncmp(tbl[i].strval, str, tbl[i].strsiz) == 0)
return tbl[i].intval;
}
return tbl[num-1].intval;
}
static const rtsp_msg_int2str_tbl_s rtsp_msg_method_tbl[] = {
{ RTSP_MSG_METHOD_OPTIONS, 7, "OPTIONS", },
{ RTSP_MSG_METHOD_DESCRIBE, 8, "DESCRIBE", },
{ RTSP_MSG_METHOD_SETUP, 5, "SETUP", },
{ RTSP_MSG_METHOD_PLAY, 4, "PLAY", },
{ RTSP_MSG_METHOD_RECORD, 6, "RECORD", },
{ RTSP_MSG_METHOD_PAUSE, 5, "PAUSE", },
{ RTSP_MSG_METHOD_TEARDOWN, 8, "TEARDOWN", },
{ RTSP_MSG_METHOD_ANNOUNCE, 8, "ANNOUNCE", },
{ RTSP_MSG_METHOD_SET_PARAMETER, 13, "SET_PARAMETER", },
{ RTSP_MSG_METHOD_GET_PARAMETER, 13, "GET_PARAMETER", },
{ RTSP_MSG_METHOD_REDIRECT, 8, "REDIRECT", },
{ RTSP_MSG_METHOD_BUTT, 0, "", },
};
static const rtsp_msg_int2str_tbl_s rtsp_msg_uri_scheme_tbl[] = {
{RTSP_MSG_URI_SCHEME_RTSPU, 6, "rtspu:"},
{RTSP_MSG_URI_SCHEME_RTSP, 5, "rtsp:"},
{RTSP_MSG_URI_SCHEME_BUTT, 0, ""},
};
static const rtsp_msg_int2str_tbl_s rtsp_msg_version_tbl[] = {
{RTSP_MSG_VERSION_1_0, 8, "RTSP/1.0"},
{RTSP_MSG_VERSION_BUTT, 0, ""},
};
static const rtsp_msg_int2str_tbl_s rtsp_msg_status_code_tbl[] = {
{100, 0, "Continue"},
{200, 0, "OK"},
{201, 0, "Created"},
{250, 0, "Low on Storage Space"},
{300, 0, "Multiple Choices"},
{301, 0, "Moved Permanently"},
{302, 0, "Moved Temporarily"},
{303, 0, "See Other"},
{305, 0, "Use Proxy"},
{400, 0, "Bad Request"},
{401, 0, "Unauthorized"},
{402, 0, "Payment Required"},
{403, 0, "Forbidden"},
{404, 0, "Not Found"},
{405, 0, "Method Not Allowed"},
{406, 0, "Not Acceptable"},
{407, 0, "Proxy Authentication Required"},
{408, 0, "Request Timeout"},
{410, 0, "Gone"},
{411, 0, "Length Required"},
{412, 0, "Precondition Failed"},
{413, 0, "Request Entity Too Large"},
{414, 0, "Request-URI Too Long"},
{415, 0, "Unsupported Media Type"},
{451, 0, "Invalid parameter"},
{452, 0, "Illegal Conference Identifier"},
{453, 0, "Not Enough Bandwidth"},
{454, 0, "Session Not Found"},
{455, 0, "Method Not Valid In This State"},
{456, 0, "Header Field Not Valid"},
{457, 0, "Invalid Range"},
{458, 0, "Parameter Is Read-Only"},
{459, 0, "Aggregate Operation Not Allowed"},
{460, 0, "Only Aggregate Operation Allowed"},
{461, 0, "Unsupported Transport"},
{462, 0, "Destination Unreachable"},
{500, 0, "Internal Server Error"},
{501, 0, "Not Implemented"},
{502, 0, "Bad Gateway"},
{503, 0, "Service Unavailable"},
{504, 0, "Gateway Timeout"},
{505, 0, "RTSP Version Not Supported"},
{551, 0, "Option not support"},
};
static const rtsp_msg_int2str_tbl_s rtsp_msg_transport_type_tbl[] = {
{RTSP_MSG_TRANSPORT_TYPE_RTP_AVP_TCP, 11, "RTP/AVP/TCP"},
{RTSP_MSG_TRANSPORT_TYPE_RTP_AVP, 7, "RTP/AVP"},
{RTSP_MSG_TRANSPORT_TYPE_BUTT, 0, ""},
};
static const rtsp_msg_int2str_tbl_s rtsp_msg_content_type_tbl[] = {
{RTSP_MSG_CONTENT_TYPE_SDP, 15, "application/sdp"},
{RTSP_MSG_CONTENT_TYPE_RTSL, 16, "application/rtsl"},
{RTSP_MSG_CONTENT_TYPE_MHEG, 16, "application/mheg"},
{RTSP_MSG_CONTENT_TYPE_BUTT, 0, ""},
};
static int rtsp_msg_parse_uri (const char *line, rtsp_msg_uri_s *uri)
{
const char *p = line, *q;
unsigned int tmp;
uri->scheme = (rtsp_msg_uri_scheme_e) rtsp_msg_str2int(rtsp_msg_uri_scheme_tbl,
ARRAY_SIZE(rtsp_msg_uri_scheme_tbl), line);
if (uri->scheme == RTSP_MSG_URI_SCHEME_BUTT) {
err("parse scheme failed. line: %s\n", line);
return -1;
}
uri->port = 0; //default
uri->ipaddr[0] = 0;
uri->abspath[0] = 0;
while (islower(*p) || *p == ':') p++;
if (*p != '/' || *(p+1) != '/') {
err("parse ip failed. line: %s\n", line);
return -1;
}
p += 2;
q = p;
while (isgraph(*q) && *q != ':' && *q != '/') q++;
if (*q == ':') {
if (sscanf(q + 1, "%u", &tmp) != 1) {
err("parse uri port failed. line: %s\n", line);
return -1;
}
uri->port = tmp;
}
tmp = q - p;
if (tmp > sizeof(uri->ipaddr) - 1)
tmp = sizeof(uri->ipaddr) - 1;
memcpy(uri->ipaddr, p, tmp);
uri->ipaddr[tmp] = 0;
while (isgraph(*q) && *q != '/') q++;
if (*q != '/')
return (q - line);
p = q;
while (isgraph(*q)) q++;
tmp = q - p;
if (tmp > sizeof(uri->abspath) - 1)
tmp = sizeof(uri->abspath) - 1;
memcpy(uri->abspath, p, tmp);
uri->abspath[tmp] = 0;
return (q - line);
}
static int rtsp_msg_build_uri (const rtsp_msg_uri_s *uri, char *line, int size)
{
if (uri->port)
snprintf(line, size, "%s//%s:%u%s",
rtsp_msg_int2str(rtsp_msg_uri_scheme_tbl,
ARRAY_SIZE(rtsp_msg_uri_scheme_tbl), uri->scheme),
uri->ipaddr, uri->port, uri->abspath);
else
snprintf(line, size, "%s//%s%s",
rtsp_msg_int2str(rtsp_msg_uri_scheme_tbl,
ARRAY_SIZE(rtsp_msg_uri_scheme_tbl), uri->scheme),
uri->ipaddr, uri->abspath);
return strlen(line);
}
//return 0. if success
static int rtsp_msg_parse_startline (rtsp_msg_s *msg, const char *line)
{
const char *p = line;
int ret;
ret = rtsp_msg_str2int(rtsp_msg_method_tbl,
ARRAY_SIZE(rtsp_msg_method_tbl), p);
if (ret != RTSP_MSG_METHOD_BUTT) {
msg->type = RTSP_MSG_TYPE_REQUEST;
msg->hdrs.startline.reqline.method = (rtsp_msg_method_e) ret;
while (isgraph(*p)) p++; p++; //next field
ret = rtsp_msg_parse_uri(p, &msg->hdrs.startline.reqline.uri);
if (ret <= 0)
return -1;
while (isgraph(*p)) p++; p++; //next field
ret = rtsp_msg_str2int(rtsp_msg_version_tbl,
ARRAY_SIZE(rtsp_msg_version_tbl), p);
if (ret == RTSP_MSG_VERSION_BUTT) {
err("parse version failed. line: %s\n", line);
return -1;
}
return 0;
}
ret = rtsp_msg_str2int(rtsp_msg_version_tbl,
ARRAY_SIZE(rtsp_msg_version_tbl), p);
if (ret != RTSP_MSG_VERSION_BUTT) {
msg->type = RTSP_MSG_TYPE_RESPONSE;
msg->hdrs.startline.resline.version = (rtsp_msg_version_e) ret;
while (isgraph(*p)) p++; p++; //next field
if (sscanf(p, "%d", &ret) != 1) {
err("parse status-code failed. line: %s\n", line);
return -1;
}
msg->hdrs.startline.resline.status_code = ret;
return 0;
}
if (*p != '$') {
err("parse startline failed: %s\n", line);
return -1;
}
msg->type = RTSP_MSG_TYPE_INTERLEAVED;
msg->hdrs.startline.interline.channel = *((uint8_t*)(p+1));
msg->hdrs.startline.interline.length = *((uint16_t*)(p+2)); //XXX
msg->hdrs.startline.interline.reserved = 0;
return 0;
}
static int rtsp_msg_build_startline (const rtsp_msg_s *msg, char *line, int size)
{
char *p = line;
int ret;
if (msg->type == RTSP_MSG_TYPE_REQUEST) {
snprintf(line, size, "%s ",
rtsp_msg_int2str(rtsp_msg_method_tbl,
ARRAY_SIZE(rtsp_msg_method_tbl),
msg->hdrs.startline.reqline.method));
ret = strlen(p);
p += ret;
size -= ret;
if (size <= 1)
return (p - line);
ret = rtsp_msg_build_uri(&msg->hdrs.startline.reqline.uri,
p, size);
p += ret;
size -= ret;
if (size <= 1)
return (p - line);
snprintf(p, size, " %s\r\n",
rtsp_msg_int2str(rtsp_msg_version_tbl,
ARRAY_SIZE(rtsp_msg_version_tbl),
msg->hdrs.startline.reqline.version));
p += strlen(p);
return (p - line);
}
if (msg->type == RTSP_MSG_TYPE_RESPONSE) {
snprintf(p, size, "%s %u %s\r\n",
rtsp_msg_int2str(rtsp_msg_version_tbl,
ARRAY_SIZE(rtsp_msg_version_tbl),
msg->hdrs.startline.resline.version),
msg->hdrs.startline.resline.status_code,
rtsp_msg_int2str(rtsp_msg_status_code_tbl,
ARRAY_SIZE(rtsp_msg_status_code_tbl),
msg->hdrs.startline.resline.status_code));
return strlen(p);
}
return 0;
}
//Transport
static int rtsp_msg_parse_transport (rtsp_msg_s *msg, const char *line)
{
rtsp_msg_hdr_s *hdrs = &msg->hdrs;
const char *p;
unsigned int tmp;
if (hdrs->transport) {
rtsp_mem_free(hdrs->transport);
hdrs->transport = NULL;
}
hdrs->transport = (rtsp_msg_transport_s *) rtsp_mem_alloc(sizeof(rtsp_msg_transport_s));
if (!hdrs->transport) {
err("rtsp_mem_alloc for %s failed\n", "rtsp_msg_transport_s");
return -1;
}
p = strstr(line, "RTP/AVP");
if (!p) {
err("parse transport failed. line: %s\n", line);
rtsp_mem_free(hdrs->transport);
hdrs->transport = NULL;
return -1;
}
hdrs->transport->type = (rtsp_msg_transport_type_e) rtsp_msg_str2int(
rtsp_msg_transport_type_tbl,
ARRAY_SIZE(rtsp_msg_transport_type_tbl), p);
if ((p=strstr(line, "ssrc="))) {
if (sscanf(p, "ssrc=%X", &tmp) == 1) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_SSRC;
hdrs->transport->ssrc = tmp;
}
}
if ((p=strstr(line, "unicast"))) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_UNICAST;
}
if ((p=strstr(line, "multicast"))) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_MULTICAST;
}
if ((p=strstr(line, "client_port="))) {
if (sscanf(p, "client_port=%u-%*u", &tmp) == 1) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_CLIENT_PORT;
hdrs->transport->client_port = tmp;
}
}
if ((p=strstr(line, "server_port="))) {
if (sscanf(p, "server_port=%u-%*u", &tmp) == 1) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_SERVER_PORT;
hdrs->transport->server_port = tmp;
}
}
if ((p=strstr(line, "interleaved="))) {
if (sscanf(p, "interleaved=%u-%*u", &tmp) == 1) {
hdrs->transport->flags |= RTSP_MSG_TRANSPORT_FLAG_INTERLEAVED;
hdrs->transport->interleaved = tmp;
}
}
return 0;
}
static int rtsp_msg_build_transport (const rtsp_msg_s *msg, char *line, int size)
{
const rtsp_msg_hdr_s *hdrs = &msg->hdrs;
if (hdrs->transport) {
char *p = line;
int len;
snprintf(p, size, "Transport: %s", rtsp_msg_int2str(rtsp_msg_transport_type_tbl,
ARRAY_SIZE(rtsp_msg_transport_type_tbl), hdrs->transport->type));
#define TRANSPORT_BUILD_STEP() \
len = strlen(p); \
p += len; \
size -= len; \
if (size <= 1) { \
return (p - line); \
}
TRANSPORT_BUILD_STEP();
if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_SSRC) {
snprintf(p, size, ";ssrc=%08X", hdrs->transport->ssrc);
TRANSPORT_BUILD_STEP();
}
if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_MULTICAST) {
snprintf(p, size, ";multicast");
TRANSPORT_BUILD_STEP();
} else if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_UNICAST) {
snprintf(p, size, ";unicast");
TRANSPORT_BUILD_STEP();
}
if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_CLIENT_PORT) {
snprintf(p, size, ";client_port=%u-%u",
hdrs->transport->client_port,
hdrs->transport->client_port + 1);
TRANSPORT_BUILD_STEP();
}
if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_SERVER_PORT) {
snprintf(p, size, ";server_port=%u-%u",
hdrs->transport->server_port,
hdrs->transport->server_port + 1);
TRANSPORT_BUILD_STEP();
}
if (hdrs->transport->flags & RTSP_MSG_TRANSPORT_FLAG_INTERLEAVED) {
snprintf(p, size, ";interleaved=%u-%u",
hdrs->transport->interleaved,
hdrs->transport->interleaved + 1);
TRANSPORT_BUILD_STEP();
}
snprintf(p, size, "\r\n");
TRANSPORT_BUILD_STEP();
return (p - line);
}
return 0;
}
//Range
static int rtsp_msg_parse_range (rtsp_msg_s *msg, const char *line)
{
return 0;//TODO
}
static int rtsp_msg_build_range (const rtsp_msg_s *msg, char *line, int size)
{
return 0;//TODO
}
//Authorization
static int rtsp_msg_parse_auth (rtsp_msg_s *msg, const char *line)
{
rtsp_msg_hdr_s *hdrs = &msg->hdrs;
const char *p = line;
unsigned int tmp = 0;
if (hdrs->auth) {
rtsp_mem_free(hdrs->auth);
hdrs->auth = NULL;
}
hdrs->auth = (rtsp_msg_auth_s*) rtsp_mem_alloc(sizeof(rtsp_msg_auth_s));
if (!hdrs->auth) {
err("rtsp_mem_alloc for %s failed\n", "rtsp_msg_auth_s");
return -1;
}
while (isgraph(*p) && *p != ':') p++;
if (*p != ':') {
rtsp_mem_free(hdrs->auth);
hdrs->auth = NULL;
err("parse %s failed. line: %s\n", "rtsp_msg_auth_s", line);
return -1;
}
p++;
while (*p == ' ') p++;
if (0 == strncmp(p, "Basic ", 6)) {
hdrs->auth->type = RTSP_MSG_AUTH_TYPE_BASIC;
p += 6;
while (isgraph(*p) && tmp < sizeof(hdrs->auth->basic_b64) - 1) {
hdrs->auth->basic_b64[tmp++] = *p++;
}
hdrs->auth->basic_b64[tmp] = 0;
} else if (0 == strncmp(p, "Digest ", 7)) {
hdrs->auth->type = RTSP_MSG_AUTH_TYPE_DIGEST;
//TODO
} else {
rtsp_mem_free(hdrs->auth);
hdrs->auth = NULL;
err("parse %s failed. line: %s\n", "rtsp_msg_auth_s", line);
return -1;
}
return 0;
}
static int rtsp_msg_build_auth (const rtsp_msg_s *msg, char *line, int size)
{
return 0;//TODO
}
//WWW-Authorization
static int rtsp_msg_parse_www_auth (rtsp_msg_s *msg, const char *line)
{
return 0;//TODO
}
static int rtsp_msg_build_www_auth (const rtsp_msg_s *msg, char *line, int size)
{
if (msg->hdrs.www_auth) {
if (msg->hdrs.www_auth->type == RTSP_MSG_AUTH_TYPE_BASIC) {
snprintf(line, size, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
msg->hdrs.www_auth->realm);
return strlen(line);
} else {
//TODO
return 0;
}
}
return 0;
}
//RTP-Info
static int rtsp_msg_parse_rtp_info (rtsp_msg_s *msg, const char *line)
{
return 0;//TODO
}
static int rtsp_msg_build_rtp_info (const rtsp_msg_s *msg, char *line, int size)
{
return 0;//TODO
}
//like CSeq/Session int
#define DEFINE_PARSE_BUILD_LIKE_CSEQ(_name, _type, _param, _fmt) \
static int rtsp_msg_parse_##_name (rtsp_msg_s *msg, const char *line) \
{ \
rtsp_msg_hdr_s *hdrs = &msg->hdrs; \
if (hdrs->_name) { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
} \
hdrs->_name = (_type*)rtsp_mem_alloc(sizeof(_type)); \
if (!hdrs->_name) { \
err("rtsp_mem_alloc for %s failed\n", #_type); \
return -1; \
} \
if (sscanf(line, _fmt, &hdrs->_name->_param) != 1) { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
err("parse %s failed. line: %s\n", #_name, line); \
return -1; \
} \
return 0; \
} \
static int rtsp_msg_build_##_name (const rtsp_msg_s *msg, char *line, int size) \
{ \
if (msg->hdrs._name) { \
snprintf(line, size, _fmt "\r\n", msg->hdrs._name->_param); \
return strlen(line); \
} \
return 0; \
}
DEFINE_PARSE_BUILD_LIKE_CSEQ(cseq, rtsp_msg_cseq_s, cseq, "CSeq: %u")
DEFINE_PARSE_BUILD_LIKE_CSEQ(session, rtsp_msg_session_s, session, "Session: %08X")
DEFINE_PARSE_BUILD_LIKE_CSEQ(content_length, rtsp_msg_content_length_s, length, "Content-Length: %u")
DEFINE_PARSE_BUILD_LIKE_CSEQ(x_accept_dynamic_rate, rtsp_msg_x_accept_dynamic_rate, x_accept_dynamic_rate, "x-accept-dynamic-Rate: %u")
DEFINE_PARSE_BUILD_LIKE_CSEQ(x_dynamic_rate, rtsp_msg_x_dynamic_rate, x_dynamic_rate, "x-dynamic-rate: %u")
//like Server/User-Agent char[]
#define DEFINE_PARSE_BUILD_LIKE_SERVER(_name, _type, _param, _fmt) \
static int rtsp_msg_parse_##_name (rtsp_msg_s *msg, const char *line) \
{ \
rtsp_msg_hdr_s *hdrs = &msg->hdrs; \
const char *p = line; \
unsigned int tmp = 0; \
if (hdrs->_name) { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
} \
hdrs->_name = (_type*)rtsp_mem_alloc(sizeof(_type)); \
if (!hdrs->_name) { \
err("rtsp_mem_alloc for %s failed\n", #_type); \
return -1; \
} \
while (isgraph(*p) && *p != ':') p++; \
if (*p != ':') { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
err("parse %s failed. line: %s\n", #_name, line); \
return -1; \
} \
p++; \
while (*p == ' ') p++; \
while (isprint(*p) && tmp < sizeof(hdrs->_name->_param) - 1) { \
hdrs->_name->_param[tmp++] = *p++; \
} \
hdrs->_name->_param[tmp] = 0; \
return 0; \
} \
static int rtsp_msg_build_##_name (const rtsp_msg_s *msg, char *line, int size) \
{ \
if (msg->hdrs._name) { \
snprintf(line, size, _fmt "\r\n", msg->hdrs._name->_param); \
return strlen(line); \
} \
return 0; \
}
DEFINE_PARSE_BUILD_LIKE_SERVER(server, rtsp_msg_server_s, server, "Server: %s")
DEFINE_PARSE_BUILD_LIKE_SERVER(user_agent, rtsp_msg_user_agent_s, user_agent, "User-Agent: %s")
DEFINE_PARSE_BUILD_LIKE_SERVER(date, rtsp_msg_date_s, http_date, "Date: %s")
//like Content-Type
#define DEFINE_PARSE_BUILD_LIKE_CONTENT_TYPE(_name, _type, _param, _fmt, _tbl) \
static int rtsp_msg_parse_##_name (rtsp_msg_s *msg, const char *line) \
{ \
rtsp_msg_hdr_s *hdrs = &msg->hdrs; \
const char *p = line; \
int num = ARRAY_SIZE(_tbl); \
int i = 0; \
if (hdrs->_name) { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
} \
hdrs->_name = (_type*)rtsp_mem_alloc(sizeof(_type)); \
if (!hdrs->_name) { \
err("rtsp_mem_alloc for %s failed\n", #_type); \
return -1; \
} \
while (isgraph(*p) && *p != ':') p++; \
if (*p != ':') { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
err("parse %s failed. line: %s\n", #_name, line); \
return -1; \
} \
p++; \
while (*p == ' ') p++; \
for (i = 0; i < num; i++) { \
if (_tbl[i].strsiz && strstr(p, _tbl[i].strval)) { \
*((int*)&hdrs->_name->_param) = _tbl[i].intval; \
return 0; \
} \
} \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
return -1; \
} \
static int rtsp_msg_build_##_name (const rtsp_msg_s *msg, char *line, int size) \
{ \
if (msg->hdrs._name) { \
int i, num = ARRAY_SIZE(_tbl); \
for (i = 0; i < num; i++) { \
if ((int)msg->hdrs._name->_param == _tbl[i].intval) { \
snprintf(line, size, _fmt "\r\n", _tbl[i].strval); \
return strlen(line); \
} \
} \
return 0; \
} \
return 0; \
}
DEFINE_PARSE_BUILD_LIKE_CONTENT_TYPE(content_type, rtsp_msg_content_type_s, type, "Content-Type: %s", rtsp_msg_content_type_tbl)
//like Public/Accept
#define DEFINE_PARSE_BUILD_LIKE_PUBLIC(_name, _type, _param, _fmt, _tbl) \
static int rtsp_msg_parse_##_name (rtsp_msg_s *msg, const char *line) \
{ \
rtsp_msg_hdr_s *hdrs = &msg->hdrs; \
const char *p = line; \
int num = ARRAY_SIZE(_tbl); \
int i = 0; \
if (hdrs->_name) { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
} \
hdrs->_name = (_type*)rtsp_mem_alloc(sizeof(_type)); \
if (!hdrs->_name) { \
err("rtsp_mem_alloc for %s failed\n", #_type); \
return -1; \
} \
while (isgraph(*p) && *p != ':') p++; \
if (*p != ':') { \
rtsp_mem_free(hdrs->_name); \
hdrs->_name = NULL; \
err("parse %s failed. line: %s\n", #_name, line); \
return -1; \
} \
p++; \
while (*p == ' ') p++; \
for (i = 0; i < num; i++) { \
if (_tbl[i].strsiz && strstr(p, _tbl[i].strval)) \
hdrs->_name->_param |= 1 << _tbl[i].intval; \
} \
return 0; \
} \
static int rtsp_msg_build_##_name (const rtsp_msg_s *msg, char *line, int size) \
{ \
if (msg->hdrs._name) { \
char *p = line; \
int len, i, flag = 0; \
int num = ARRAY_SIZE(_tbl); \
snprintf(p, size, _fmt, ""); \
len = strlen(p); \
p += len; \
size -= len; \
if (size <= 1) { \
return (p - line); \
} \
for (i = 0; i < num; i++) { \
if (msg->hdrs._name->_param & (1 << _tbl[i].intval)) { \
if (flag) { \
snprintf(p, size, ", %s", _tbl[i].strval); \
} else { \
snprintf(p, size, "%s", _tbl[i].strval); \
flag = 1; \
} \
len = strlen(p); \
p += len; \
size -= len; \
if (size <= 1) { \
return (p - line); \
} \
} \
} \
snprintf(p, size, "\r\n"); \
len = strlen(p); \
p += len; \
return (p - line); \
} \
return 0; \
}
DEFINE_PARSE_BUILD_LIKE_PUBLIC(public_, rtsp_msg_public_s, public_, "Public: %s", rtsp_msg_method_tbl)
DEFINE_PARSE_BUILD_LIKE_PUBLIC(accept, rtsp_msg_accept_s, accept, "Accept: %s", rtsp_msg_content_type_tbl)
typedef int (*rtsp_msg_line_parser) (rtsp_msg_s *msg, const char *line);
typedef struct __rtsp_msg_str2parser_tbl_s
{
int strsiz;
const char *strval;
rtsp_msg_line_parser parser;
} rtsp_msg_str2parser_tbl_s;
static const rtsp_msg_str2parser_tbl_s rtsp_msg_hdr_line_parse_tbl[] = {
{6, "CSeq: ", rtsp_msg_parse_cseq},
{6, "Date: ", rtsp_msg_parse_date},
{9, "Session: ", rtsp_msg_parse_session},
{11, "Transport: ", rtsp_msg_parse_transport},
{7, "Range: ", rtsp_msg_parse_range},
{8, "Accept: ", rtsp_msg_parse_accept},
{15, "Authorization: ", rtsp_msg_parse_auth},
{19, "WWW-Authorization: ", rtsp_msg_parse_www_auth},
{12, "User-Agent: ", rtsp_msg_parse_user_agent},
{8, "Public: ", rtsp_msg_parse_public_},
{10, "RTP-Info: ", rtsp_msg_parse_rtp_info},
{8, "Server: ", rtsp_msg_parse_server},
{14, "Content-Type: ", rtsp_msg_parse_content_type},
{16, "Content-Length: ", rtsp_msg_parse_content_length},
{23, "x-accept-dynamic-rate: ", rtsp_msg_parse_x_accept_dynamic_rate},
{15, "x-dynamic-rate: ", rtsp_msg_parse_x_dynamic_rate},
};
static rtsp_msg_line_parser rtsp_msg_str2parser (const char *line)
{
const rtsp_msg_str2parser_tbl_s *tbl = rtsp_msg_hdr_line_parse_tbl;
int num = ARRAY_SIZE(rtsp_msg_hdr_line_parse_tbl);
int i;
for (i = 0; i < num; i++) {
if (strncmp(tbl[i].strval, line, tbl[i].strsiz) == 0)
return tbl[i].parser;
}
return NULL;
}
//@start: data
//@line: store current line (has \0. but no \r\n)
//@maxlen: line max size
//@return: non-NULL is next line pointer. NULL has no next line
static const char *rtsp_msg_hdr_next_line (const char *start, char *line, int maxlen)
{
const char *p = start;
while (*p && *p != '\r' && *p != '\n') p++;
if (*p != '\r' || *(p+1) != '\n')
return NULL;
if (line && maxlen > 0) {
maxlen --;
if (maxlen > p - start)
maxlen = p - start;
memcpy(line, start, maxlen);
line[maxlen] = '\0';
}
return (p + 2);
}
int rtsp_msg_init (rtsp_msg_s *msg)
{
if (msg)
memset(msg, 0, sizeof(rtsp_msg_s));
return 0;
}
//free all msg elements. not free msg
void rtsp_msg_free (rtsp_msg_s *msg)
{
if (msg->hdrs.cseq)
rtsp_mem_free(msg->hdrs.cseq);
if (msg->hdrs.date)
rtsp_mem_free(msg->hdrs.date);
if (msg->hdrs.session)
rtsp_mem_free(msg->hdrs.session);
if (msg->hdrs.transport)
rtsp_mem_free(msg->hdrs.transport);
if (msg->hdrs.range)
rtsp_mem_free(msg->hdrs.range);
if (msg->hdrs.x_accept_dynamic_rate)
rtsp_mem_free(msg->hdrs.x_accept_dynamic_rate);
if (msg->hdrs.x_dynamic_rate)
rtsp_mem_free(msg->hdrs.x_dynamic_rate);
if (msg->hdrs.accept)
rtsp_mem_free(msg->hdrs.accept);
if (msg->hdrs.auth)
rtsp_mem_free(msg->hdrs.auth);
if (msg->hdrs.www_auth)
rtsp_mem_free(msg->hdrs.www_auth);
if (msg->hdrs.user_agent)
rtsp_mem_free(msg->hdrs.user_agent);
if (msg->hdrs.public_)
rtsp_mem_free(msg->hdrs.public_);
//TODO free rtp-info
if (msg->hdrs.server)
rtsp_mem_free(msg->hdrs.server);
if (msg->hdrs.content_type)
rtsp_mem_free(msg->hdrs.content_type);
if (msg->hdrs.content_length)
rtsp_mem_free(msg->hdrs.content_length);
if (msg->body.body)
rtsp_mem_free(msg->body.body);
memset(msg, 0, sizeof(rtsp_msg_s));
}
uint32_t rtsp_msg_gen_session_id (void)
{
static uint32_t session_id = 0x12345678;
return session_id++; //FIXME
}
//return frame real size. when frame is completed
//return 0. when frame size is not enough
//return -1. when frame is invalid
int rtsp_msg_frame_size (const void *data, int size)
{
const char *frame = (const char *)data;
const char *p;
int hdrlen = 0, content_len = 0;
//check first
p = strstr(frame, "\r\n");
if (!p || size < p - frame + 2) {
if (size > 256)
return -1; //first line is too large
return 0;
}
//check headers
p = strstr(frame, "\r\n\r\n");
if (!p || size < p - frame + 4) {
if (size > 1024)
return -1; //headers is too large
return 0;
}
hdrlen = p - frame + 4;
//get content-length
p = frame;
while ((p = rtsp_msg_hdr_next_line(p, NULL, 0))) {
if (strncmp(p, "\r\n", 2) == 0)
break; //header end
if (strncmp(p, "Content-Length", 14) == 0) {
if (sscanf(p, "Content-Length: %d", &content_len) != 1) {
err("parse Content-Length failed. line: %s", p);
return -1;
}
}
}
if (size < hdrlen + content_len)
return 0;
return (hdrlen + content_len);
}
//return data's bytes which is parsed. when success
//return 0. when data is not enough
//return -1. when data is invalid
int rtsp_msg_parse_from_array (rtsp_msg_s *msg, const void *data, int size)
{
const char *frame = (const char *)data;
const char *p = frame;
char line[256];
int ret;
memset(msg, 0, sizeof(rtsp_msg_s));
//interleaved frame
if (frame[0] == '$') {
uint16_t interlen = *((uint16_t*)(p+2));
interlen = ntohs(interlen);
if (size < interlen + 4)
return 0;
msg->type = RTSP_MSG_TYPE_INTERLEAVED;
msg->hdrs.startline.interline.channel = *((uint8_t*)(p+1));
msg->hdrs.startline.interline.length = interlen;
msg->body.body = rtsp_mem_dup((const char*)data + 4, interlen);
return (interlen + 4);
}
dbg("\n%s", frame);
ret = rtsp_msg_frame_size(data, size);
if (ret <= 0)
return ret;
size = ret;
p = rtsp_msg_hdr_next_line(p, line, sizeof(line));
if (!p) {
return -1;
}
ret = rtsp_msg_parse_startline(msg, line);
if (ret < 0)
return -1;
while ((p = rtsp_msg_hdr_next_line(p, line, sizeof(line)))) {
rtsp_msg_line_parser parser;
if (strlen(line) == 0)
break;
parser = rtsp_msg_str2parser(line);
if (!parser) {
warn("unknown line: %s\n", line);
continue;
}
ret = (*parser) (msg, line);
if (ret < 0) {
err("parse failed. line: %s\n", line);
break;
}
}
if (!p || strlen(line)) {
//dbg("p = %p len = %lu\n", p, strlen(line));
rtsp_msg_free(msg);
return -1;
}
if (msg->hdrs.content_length) {
msg->body.body = rtsp_mem_dup(p, msg->hdrs.content_length->length);
if (!msg->body.body) {
err("set body failed\n");
rtsp_msg_free(msg);
return -1;
}
}
//debug
ret = p - frame;
if (msg->hdrs.content_length)
ret += msg->hdrs.content_length->length;
if (ret != size) {
warn("frame size is %d. but real used %d\n", size, ret);
}
return size;
}
//return data's bytes which is used. when success
//return -1. when failed
int rtsp_msg_build_to_array (const rtsp_msg_s *msg, void *data, int size)
{
char *frame = (char *)data;