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rtspservice.c
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rtspservice.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <sys/select.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <pthread.h>
#include <errno.h>
#include "rtsputils.h"
#include "rtspservice.h"
#include "rtputils.h"
#include "ringfifo.h"
struct profileid_sps_pps{
char base64profileid[10];
char base64sps[524];
char base64pps[524];
};
pthread_mutex_t mut;
#define MAX_SIZE 1024*1024*200
#define SDP_EL "\r\n"
#define RTSP_RTP_AVP "RTP/AVP"
struct profileid_sps_pps psp; //存base64编码的profileid sps pps
StServPrefs stPrefs;
extern int num_conn;
int g_s32Maxfd = 0;//最大轮询id号
int g_s32DoPlay = 0;
uint32_t s_u32StartPort=RTP_DEFAULT_PORT;
uint32_t s_uPortPool[MAX_CONNECTION];//RTP端口
extern int stop_schedule;
int g_s32Quit = 0;//退出全局变量
void RTP_port_pool_init(int port);
int UpdateSpsOrPps(unsigned char *data,int frame_type,int len);
/**************************************************************************************************
**
**
**
**************************************************************************************************/
void PrefsInit()
{
int l;
//设置服务器信息全局变量
stPrefs.port = SERVER_RTSP_PORT_DEFAULT;
gethostname(stPrefs.hostname,sizeof(stPrefs.hostname));
l=strlen(stPrefs.hostname);
if (getdomainname(stPrefs.hostname+l+1,sizeof(stPrefs.hostname)-l)!=0)
{
stPrefs.hostname[l]='.';
}
#ifdef RTSP_DEBUG
printf("\n");
printf("\thostname is: %s\n", stPrefs.hostname);
printf("\trtsp listening port is: %d\n", stPrefs.port);
printf("\tInput rtsp://hostIP:%d/test.264 to play this\n",stPrefs.port);
printf("\n");
#endif
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//为缓冲分配空间
void RTSP_initserver(RTSP_buffer *rtsp, int fd)
{
rtsp->fd = fd;
rtsp->session_list = (RTSP_session *) calloc(1, sizeof(RTSP_session));
rtsp->session_list->session_id = -1;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//为RTP准备两个端口
int RTP_get_port_pair(port_pair *pair)
{
int i;
for (i=0; i<MAX_CONNECTION; ++i)
{
if (s_uPortPool[i]!=0)
{
pair->RTP=(s_uPortPool[i]-s_u32StartPort)*2+s_u32StartPort;
pair->RTCP=pair->RTP+1;
s_uPortPool[i]=0;
return ERR_NOERROR;
}
}
return ERR_GENERIC;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
void AddClient(RTSP_buffer **ppRtspList, int fd)
{
RTSP_buffer *pRtsp=NULL,*pRtspNew=NULL;
#ifdef RTSP_DEBUG
fprintf(stderr, "%s, %d\n", __FUNCTION__, __LINE__);
#endif
//在链表头部插入第一个元素
if (*ppRtspList==NULL)
{
/*分配空间*/
if ( !(*ppRtspList=(RTSP_buffer*)calloc(1,sizeof(RTSP_buffer)) ) )
{
fprintf(stderr,"alloc memory error %s,%i\n", __FILE__, __LINE__);
return;
}
pRtsp = *ppRtspList;
}
else
{
//向链表中插入新的元素
for (pRtsp=*ppRtspList; pRtsp!=NULL; pRtsp=pRtsp->next)
{
pRtspNew=pRtsp;
}
/*在链表尾部插入*/
if (pRtspNew!=NULL)
{
if ( !(pRtspNew->next=(RTSP_buffer *)calloc(1,sizeof(RTSP_buffer)) ) )
{
fprintf(stderr, "error calloc %s,%i\n", __FILE__, __LINE__);
return;
}
pRtsp=pRtspNew->next;
pRtsp->next=NULL;
}
}
//设置最大轮询id号
if(g_s32Maxfd < fd)
{
g_s32Maxfd = fd;
}
/*初始化新添加的客户端*/
RTSP_initserver(pRtsp,fd);
fprintf(stderr,"Incoming RTSP connection accepted on socket: %d\n",pRtsp->fd);
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
/*根据缓冲区的内容，填充后边两个长度数据,检查缓冲区中消息的完整性
* return -1 on ERROR
* return RTSP_not_full (0) if a full RTSP message is NOT present in the in_buffer yet.
* return RTSP_method_rcvd (1) if a full RTSP message is present in the in_buffer and is
* ready to be handled.
* return RTSP_interlvd_rcvd (2) if a complete RTP/RTCP interleaved packet is present.
* terminate on really ugly cases.
*/
int RTSP_full_msg_rcvd(RTSP_buffer *rtsp, int *hdr_len, int *body_len)
{
int eomh; /* end of message header found */
int mb; /* message body exists */
int tc; /* terminator count */
int ws; /* white space */
unsigned int ml; /* total message length including any message body */
int bl; /* message body length */
char c; /* character */
int control;
char *p;
/*是否存在交叉存取的二进制rtp/rtcp数据包，参考RFC2326-10.12*/
if (rtsp->in_buffer[0] == '$')
{
uint16_t *intlvd_len = (uint16_t *)&rtsp->in_buffer[2]; /*跳过通道标志符*/
/*转化为主机字节序，因为长度是网络字节序*/
if ( (bl = ntohs(*intlvd_len)) <= rtsp->in_size)
{
fprintf(stderr,"Interleaved RTP or RTCP packet arrived (len: %hu).\n", bl);
if (hdr_len)
*hdr_len = 4;
if (body_len)
*body_len = bl;
return RTSP_interlvd_rcvd;
}
else
{
/*缓冲区不能完全存放数据*/
fprintf(stderr,"Non-complete Interleaved RTP or RTCP packet arrived.\n");
return RTSP_not_full;
}
}
eomh = mb = ml = bl = 0;
while (ml <= rtsp->in_size)
{
/* look for eol. */
/*计算不包含回车、换行在内的所有字符数*/
control = strcspn(&(rtsp->in_buffer[ml]), "\r\n");
if(control > 0)
ml += control;
else
return ERR_GENERIC;
/* haven't received the entire message yet. */
if (ml > rtsp->in_size)
return RTSP_not_full;
/* 处理终结符，判读是否是消息头的结束*/
tc = ws = 0;
while (!eomh && ((ml + tc + ws) < rtsp->in_size))
{
c = rtsp->in_buffer[ml + tc + ws];
/*统计回车换行*/
if (c == '\r' || c == '\n')
tc++;
else if ((tc < 3) && ((c == ' ') || (c == '\t')))
{
ws++; /*回车、换行之间的空格或者TAB，也是可以接受的 */
}
else
{
break;
}
}
/*
*一对回车、换行符仅仅被统计为一个行终结符
* 双行可以被接受，并将其认为是消息头的结束标识
* 这与RFC2068中的描述一致，参考rfc2068 19.3
*否则，对所有的HTTP/1.1兼容协议消息元素来说，
*回车、换行被认为是合法的行终结符
*/
/* must be the end of the message header */
if ((tc > 2) || ((tc == 2) && (rtsp->in_buffer[ml] == rtsp->in_buffer[ml + 1])))
eomh = 1;
ml += tc + ws;
if (eomh)
{
ml += bl; /* 加入消息体长度 */
if (ml <= rtsp->in_size)
break; /* all done finding the end of the message. */
}
if (ml >= rtsp->in_size)
return RTSP_not_full; /* 还没有完全接收消息 */
/*检查每一行的第一个记号，确定是否有消息体存在 */
if (!mb)
{
/* content length token not yet encountered. */
if (!strncmp(&(rtsp->in_buffer[ml]), HDR_CONTENTLENGTH, strlen(HDR_CONTENTLENGTH)))
{
mb = 1; /* 存在消息体. */
ml += strlen(HDR_CONTENTLENGTH);
/*跳过:和空格，找到长度字段*/
while (ml < rtsp->in_size)
{
c = rtsp->in_buffer[ml];
if ((c == ':') || (c == ' '))
ml++;
else
break;
}
//Content-Length:后面是消息体长度值
if (sscanf(&(rtsp->in_buffer[ml]), "%d", &bl) != 1)
{
fprintf(stderr,"RTSP_full_msg_rcvd(): Invalid ContentLength encountered in message.\n");
return ERR_GENERIC;
}
}
}
}
if (hdr_len)
*hdr_len = ml - bl;
if (body_len)
{
/*
* go through any trailing nulls. Some servers send null terminated strings
* following the body part of the message. It is probably not strictly
* legal when the null byte is not included in the Content-Length count.
* However, it is tolerated here.
* 减去可能存在的\0，它没有被计算在Content-Length中
*/
for (tc = rtsp->in_size - ml, p = &(rtsp->in_buffer[ml]); tc && (*p == '\0'); p++, bl++, tc--);
*body_len = bl;
}
return RTSP_method_rcvd;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
/*
* return 0 是客户端发送的请求
* 1 是服务器返回的响应
*/
int RTSP_valid_response_msg(unsigned short *status, RTSP_buffer * rtsp)
{
char ver[32], trash[15];
unsigned int stat;
unsigned int seq;
int pcnt; /* parameter count */
/* assuming "stat" may not be zero (probably faulty) */
stat = 0;
/*从消息中填充数据*/
pcnt = sscanf(rtsp->in_buffer, " %31s %u %s %s %u\n%*255s ", ver, &stat, trash, trash, &seq);
/* 通过起始字符，检查信息是客户端发送的请求还是服务器做出的响应*/
/* C->S CMD rtsp://IP:port/suffix RTSP/1.0\r\n |head
* CSeq: 1 \r\n |
* Content_Length:** |body
* S->C RTSP/1.0 200 OK\r\n
* CSeq: 1\r\n
* Date:....
*/
if (strncmp(ver, "RTSP/", 5))
return 0; /*不是响应消息，是客户端请求消息，返回*/
/*确信至少存在版本、状态码、序列号*/
if (pcnt < 3 || stat == 0)
return 0; /* 表示不是一个响应消息 */
/*如果版本不兼容，在此处增加码来拒绝该消息*/
/*检查回复消息中的序列号是否合法*/
if (rtsp->rtsp_cseq != seq + 1)
{
fprintf(stderr,"Invalid sequence number returned in response.\n");
return ERR_GENERIC; /*序列号错误，返回*/
}
*status = stat;
return 1;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//返回请求方法类型，出错返回-1
int RTSP_validate_method(RTSP_buffer * pRtsp)
{
char method[32], hdr[16];
char object[256];
char ver[32];
unsigned int seq;
int pcnt; /* parameter count */
int mid = ERR_GENERIC;
char *p; //=======增加
char trash[255]; //===增加
*method = *object = '\0';
seq = 0;
printf("");
/*按照请求消息的格式解析消息的第一行*/
// if ( (pcnt = sscanf(pRtsp->in_buffer, " %31s %255s %31s\n%15s", method, object, ver, hdr, &seq)) != 5){
if ( (pcnt = sscanf(pRtsp->in_buffer, " %31s %255s %31s\n%15s", method, object, ver, hdr)) != 4){
printf("========\n%s\n==========\n",pRtsp->in_buffer);
printf("%s ",method);
printf("%s ",object);
printf("%s ",ver);
printf("hdr:%s\n",hdr);
return ERR_GENERIC;
}
/*如果没有头标记，则错误*/
/*
if ( !strstr(hdr, HDR_CSEQ) ){
printf("no HDR_CSEQ err_generic");
return ERR_GENERIC;
}
*/
//===========加
if ((p = strstr(pRtsp->in_buffer, "CSeq")) == NULL) {
return ERR_GENERIC;
}else {
if(sscanf(p,"%254s %d",trash,&seq)!=2){
return ERR_GENERIC;
}
}
//==========
/*根据不同的方法，返回响应的方法ID*/
if (strcmp(method, RTSP_METHOD_DESCRIBE) == 0) {
mid = RTSP_ID_DESCRIBE;
}
if (strcmp(method, RTSP_METHOD_ANNOUNCE) == 0) {
mid = RTSP_ID_ANNOUNCE;
}
if (strcmp(method, RTSP_METHOD_GET_PARAMETERS) == 0) {
mid = RTSP_ID_GET_PARAMETERS;
}
if (strcmp(method, RTSP_METHOD_OPTIONS) == 0) {
mid = RTSP_ID_OPTIONS;
}
if (strcmp(method, RTSP_METHOD_PAUSE) == 0) {
mid = RTSP_ID_PAUSE;
}
if (strcmp(method, RTSP_METHOD_PLAY) == 0) {
mid = RTSP_ID_PLAY;
}
if (strcmp(method, RTSP_METHOD_RECORD) == 0) {
mid = RTSP_ID_RECORD;
}
if (strcmp(method, RTSP_METHOD_REDIRECT) == 0) {
mid = RTSP_ID_REDIRECT;
}
if (strcmp(method, RTSP_METHOD_SETUP) == 0) {
mid = RTSP_ID_SETUP;
}
if (strcmp(method, RTSP_METHOD_SET_PARAMETER) == 0) {
mid = RTSP_ID_SET_PARAMETER;
}
if (strcmp(method, RTSP_METHOD_TEARDOWN) == 0) {
mid = RTSP_ID_TEARDOWN;
}
/*设置当前方法的请求序列号*/
pRtsp->rtsp_cseq = seq;
return mid;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//解析URL中的port端口和文件名称
int ParseUrl(const char *pUrl, char *pServer, unsigned short *port, char *pFileName, size_t FileNameLen)
{
/* expects format [rtsp://server[:port/]]filename RTSP/1.0*/
int s32NoValUrl;
/*拷贝URL */
char *pFull = (char *)malloc(strlen(pUrl) + 1);
strcpy(pFull, pUrl);
/*检查前缀是否正确*/
if (strncmp(pFull, "rtsp://", 7) == 0)
{
char *pSuffix;
//找到/ 它之后是文件名
if((pSuffix = strchr(&pFull[7], '/')) != NULL)
{
char *pPort;
char pSubPort[128];
//判断是否有端口
pPort=strchr(&pFull[7], ':');
if(pPort != NULL)
{
strncpy(pServer,&pFull[7],pPort-pFull-7);
printf("server:%s\n",pServer);
strncpy(pSubPort, pPort+1, pSuffix-pPort-1);
pSubPort[pSuffix-pPort-1] = '\0';
*port = (unsigned short) atol(pSubPort);
printf("port:%d\n",port);
}
else
{
*port = SERVER_RTSP_PORT_DEFAULT;
}
pSuffix++;
//跳过空格或者制表符
while(*pSuffix == ' '||*pSuffix == '\t')
{
pSuffix++;
}
//拷贝文件名
strcpy(pFileName, pSuffix);
s32NoValUrl = 0;
}
else
{
*port = SERVER_RTSP_PORT_DEFAULT;
*pFileName = '\0';
s32NoValUrl = 1;
}
}else
{
*pFileName = '\0';
s32NoValUrl = 1;
}
//释放空间
free(pFull);
return s32NoValUrl;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//把当前时间作为session号
char *GetSdpId(char *buffer)
{
time_t t;
buffer[0]='\0';
t = time(NULL);
sprintf(buffer,"%.0f",(float)t+2208988800U); /*获得NPT时间*/
return buffer;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
void GetSdpDescr(RTSP_buffer * pRtsp, char *pDescr, char *s8Str)
{
/*/=====================================
char const* const SdpPrefixFmt =
"v=0\r\n" //版本信息
"o=- %s %s IN IP4 %s\r\n" //<用户名><会话id><版本>//<网络类型><地址类型><地址>
"c=IN IP4 %s\r\n" //c=<网络信息><地址信息><连接地址>对ip4为0.0.0.0 here！
"s=RTSP Session\r\n" //会话名session id
"i=N/A\r\n" //会话信息
"t=0 0\r\n" //<开始时间><结束时间>
"a=recvonly\r\n"
"m=video %s RTP/AVP 96\r\n\r\n"; //<媒体格式><端口><传送><格式列表,即媒体净荷类型> m=video 5004 RTP/AVP 96
struct ifreq stIfr;
char pSdpId[128];
//获取本机地址
strcpy(stIfr.ifr_name, "eth0");
if(ioctl(pRtsp->fd, SIOCGIFADDR, &stIfr) < 0)
{
//printf("Failed to get host eth0 ip\n");
strcpy(stIfr.ifr_name, "wlan0");
if(ioctl(pRtsp->fd, SIOCGIFADDR, &stIfr) < 0)
{
printf("Failed to get host eth0 or wlan0 ip\n");
}
}
sock_ntop_host(&stIfr.ifr_addr, sizeof(struct sockaddr), s8Str, 128);
GetSdpId(pSdpId);
sprintf(pDescr, SdpPrefixFmt, pSdpId, pSdpId, s8Str, inet_ntoa(((struct sockaddr_in *)(&pRtsp->stClientAddr))->sin_addr), "5006", "H264");
"b=RR:0\r\n"
//按spydroid改
"a=rtpmap:96 %s/90000\r\n" //a=rtpmap:<净荷类型><编码名>/<时钟速率> a=rtpmap:96 H264/90000
"a=fmtp:96 packetization-mode=1;profile-level-id=1EE042;sprop-parameter-sets=QuAe2gLASRA=,zjCkgA==\r\n"
"a=control:trackID=0\r\n";
#ifdef RTSP_DEBUG
// printf("SDP:\n%s\n", pDescr);
#endif
*/
struct ifreq stIfr;
char pSdpId[128];
char rtp_port[5];
strcpy(stIfr.ifr_name, "eth0");
if(ioctl(pRtsp->fd, SIOCGIFADDR, &stIfr) < 0)
{
//printf("Failed to get host eth0 ip\n");
strcpy(stIfr.ifr_name, "wlan0");
if(ioctl(pRtsp->fd, SIOCGIFADDR, &stIfr) < 0)
{
printf("Failed to get host eth0 or wlan0 ip\n");
}
}
sock_ntop_host(&stIfr.ifr_addr, sizeof(struct sockaddr), s8Str, 128);
GetSdpId(pSdpId);
strcpy(pDescr, "v=0\r\n");
strcat(pDescr, "o=-");
strcat(pDescr, pSdpId);
strcat(pDescr," ");
strcat(pDescr, pSdpId);
strcat(pDescr," IN IP4 ");
strcat(pDescr, s8Str);
strcat(pDescr, "\r\n");
strcat(pDescr, "s=Unnamed\r\n");
strcat(pDescr, "i=N/A\r\n");
strcat(pDescr, "c=");
strcat(pDescr, "IN "); /* Network type: Internet. */
strcat(pDescr, "IP4 "); /* Address type: IP4. */
//strcat(pDescr, get_address());
strcat(pDescr, inet_ntoa(((struct sockaddr_in *)(&pRtsp->stClientAddr))->sin_addr));
strcat(pDescr, "\r\n");
strcat(pDescr, "t=0 0\r\n");
strcat(pDescr, "a=recvonly\r\n");
/**** media specific ****/
strcat(pDescr,"m=");
strcat(pDescr,"video ");
sprintf(rtp_port,"%d",s_u32StartPort);
strcat(pDescr, rtp_port);
strcat(pDescr," RTP/AVP "); /* Use UDP */
strcat(pDescr,"96\r\n");
//strcat(pDescr, "\r\n");
strcat(pDescr,"b=RR:0\r\n");
/**** Dynamically defined payload ****/
strcat(pDescr,"a=rtpmap:96");
strcat(pDescr," ");
strcat(pDescr,"H264/90000");
strcat(pDescr, "\r\n");
strcat(pDescr,"a=fmtp:96 packetization-mode=1;");
strcat(pDescr,"profile-level-id=");
strcat(pDescr,psp.base64profileid);
strcat(pDescr,";sprop-parameter-sets=");
strcat(pDescr,psp.base64sps);
strcat(pDescr,",");
strcat(pDescr,psp.base64pps);
strcat(pDescr,";");
strcat(pDescr, "\r\n");
strcat(pDescr,"a=control:trackID=0");
strcat(pDescr, "\r\n");
printf("\n\n%s,%d===>psp.base64profileid=%s,psp.base64sps=%s,psp.base64pps=%s\n\n",__FUNCTION__,__LINE__,psp.base64profileid,psp.base64sps,psp.base64pps);
/*
strcat(pDescr, "m=audio ");
strcat(pDescr,"5004");
strcat(pDescr," RTP/AVP 96\r\n");
strcat(pDescr, "b=AS:128\r\n");
strcat(pDescr, "b=RR:0\r\n");
strcat(pDescr, "a=rtpmap:96 AMR/8000\r\n");
strcat(pDescr, "a=fmtp:96 octrt-align=1;\r\n");
strcat(pDescr,"a=control:trackID=1");
strcat(pDescr, "\r\n");
*/
//strcat(pDescr, "\r\n");
//printf("0\r\n");
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
/*添加时间戳*/
void add_time_stamp(char *b, int crlf)
{
struct tm *t;
time_t now;
/*
* concatenates a null terminated string with a
* time stamp in the format of "Date: 23 Jan 1997 15:35:06 GMT"
*/
now = time(NULL);
t = gmtime(&now);
//输出时间格式：Date: Fri, 15 Jul 2011 09:23:26 GMT
strftime(b + strlen(b), 38, "Date: %a, %d %b %Y %H:%M:%S GMT"RTSP_EL, t);
//是否是消息结束，添加回车换行符
if (crlf)
strcat(b, "\r\n"); /* add a message header terminator (CRLF) */
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
int SendDescribeReply(RTSP_buffer * rtsp, char *object, char *descr, char *s8Str)
{
char *pMsgBuf; /* 用于获取响应缓冲指针*/
int s32MbLen;
/* 分配空间，处理内部错误*/
s32MbLen = 2048;
pMsgBuf = (char *)malloc(s32MbLen);
if (!pMsgBuf)
{
fprintf(stderr,"send_describe_reply(): unable to allocate memory\n");
send_reply(500, 0, rtsp); /* internal server error */
if (pMsgBuf)
{
free(pMsgBuf);
}
return ERR_ALLOC;
}
/*构造describe消息串*/
sprintf(pMsgBuf, "%s %d %s"RTSP_EL"CSeq: %d"RTSP_EL"Server: %s/%s"RTSP_EL, RTSP_VER, 200, get_stat(200), rtsp->rtsp_cseq, PACKAGE, VERSION);
add_time_stamp(pMsgBuf, 0); /*添加时间戳*/
strcat(pMsgBuf, "Content-Type: application/sdp"RTSP_EL); /*实体头，表示实体类型*/
/*用于解析实体内相对url的 绝对url*/
sprintf(pMsgBuf + strlen(pMsgBuf), "Content-Base: rtsp://%s/%s/"RTSP_EL, s8Str, object);
sprintf(pMsgBuf + strlen(pMsgBuf), "Content-Length: %d"RTSP_EL, strlen(descr)); /*消息体的长度*/
strcat(pMsgBuf, RTSP_EL);
/*消息头结束*/
/*加上消息体*/
strcat(pMsgBuf, descr); /*describe消息*/
/*向缓冲区中填充数据*/
bwrite(pMsgBuf, (unsigned short) strlen(pMsgBuf), rtsp);
free(pMsgBuf);
return ERR_NOERROR;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//describe处理
int RTSP_describe(RTSP_buffer * pRtsp)
{
char object[255], trash[255];
char *p;
unsigned short port;
char s8Url[255];
char s8Descr[MAX_DESCR_LENGTH];
char server[128];
char s8Str[128];
/*根据收到的请求请求消息，跳过方法名，分离出URL*/
if (!sscanf(pRtsp->in_buffer, " %*s %254s ", s8Url))
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp); /* bad request */
printf("get URL error");
return ERR_NOERROR;
}
/*验证URL */
switch (ParseUrl(s8Url, server, &port, object, sizeof(object)))
{
case 1: /*请求错误*/
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp);
printf("url request error");
return ERR_NOERROR;
break;
case -1: /*内部错误*/
fprintf(stderr,"url error while parsing !\n");
send_reply(500, 0, pRtsp);
printf("inner error");
return ERR_NOERROR;
break;
default:
break;
}
/*取得序列号,并且必须有这个选项*/
if ((p = strstr(pRtsp->in_buffer, HDR_CSEQ)) == NULL)
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp); /* Bad Request */
printf("get serial num error");
return ERR_NOERROR;
}
else
{
if (sscanf(p, "%254s %d", trash, &(pRtsp->rtsp_cseq)) != 2)
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp); /*请求错误*/
printf("get serial num 2 error");
return ERR_NOERROR;
}
}
//获取SDP内容
GetSdpDescr(pRtsp, s8Descr, s8Str);
//发送Describe响应
//printf("----------------1\r\n");
SendDescribeReply(pRtsp, object, s8Descr, s8Str);
//printf("2\r\n");
return ERR_NOERROR;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//发送options处理后的响应
int send_options_reply(RTSP_buffer * pRtsp, long cseq)
{
char r[1024];
sprintf(r, "%s %d %s"RTSP_EL"CSeq: %ld"RTSP_EL, RTSP_VER, 200, get_stat(200), cseq);
strcat(r, "Public: OPTIONS,DESCRIBE,SETUP,PLAY,PAUSE,TEARDOWN"RTSP_EL);
strcat(r, RTSP_EL);
bwrite(r, (unsigned short) strlen(r), pRtsp);
#ifdef RTSP_DEBUG
// fprintf(stderr ,"SERVER SEND Option Replay: %s\n", r);
#endif
return ERR_NOERROR;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
//options处理
int RTSP_options(RTSP_buffer * pRtsp)
{
char *p;
char trash[255];
unsigned int cseq;
char method[255], url[255], ver[255];
#ifdef RTSP_DEBUG
// trace_point();
#endif
/*序列号*/
if ((p = strstr(pRtsp->in_buffer, HDR_CSEQ)) == NULL)
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp);/* Bad Request */
printf("serial num error");
return ERR_NOERROR;
}
else
{
if (sscanf(p, "%254s %d", trash, &(pRtsp->rtsp_cseq)) != 2)
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(400, 0, pRtsp);/* Bad Request */
printf("serial num 2 error");
return ERR_NOERROR;
}
}
cseq = pRtsp->rtsp_cseq;
#ifdef RTSP_DEBUG
sscanf(pRtsp->in_buffer, " %31s %255s %31s ", method, url, ver);
fprintf(stderr,"%s %s %s \n",method,url,ver);
#endif
//发送option处理后的消息
send_options_reply(pRtsp, cseq);
return ERR_NOERROR;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
int send_setup_reply(RTSP_buffer *pRtsp, RTSP_session *pSession, RTP_session *pRtpSes)
{
char s8Str[1024];
sprintf(s8Str, "%s %d %s"RTSP_EL"CSeq: %ld"RTSP_EL"Server: %s/%s"RTSP_EL, RTSP_VER,\
200, get_stat(200), (long int)pRtsp->rtsp_cseq, PACKAGE, VERSION);
add_time_stamp(s8Str, 0);
sprintf(s8Str + strlen(s8Str), "Session: %d"RTSP_EL"Transport: ", (pSession->session_id));
switch (pRtpSes->transport.type)
{
case RTP_rtp_avp:
if (pRtpSes->transport.u.udp.is_multicast)
{
// sprintf(s8Str + strlen(s8Str), "RTP/AVP;multicast;ttl=%d;destination=%s;port=", (int)DEFAULT_TTL, descr->multicast);
}
else
{
sprintf(s8Str + strlen(s8Str), "RTP/AVP;unicast;client_port=%d-%d;destination=192.168.245.65;source=%s;server_port=", \
pRtpSes->transport.u.udp.cli_ports.RTP, pRtpSes->transport.u.udp.cli_ports.RTCP,"192.168.245.96");
}
sprintf(s8Str + strlen(s8Str), "%d-%d"RTSP_EL, pRtpSes->transport.u.udp.ser_ports.RTP, pRtpSes->transport.u.udp.ser_ports.RTCP);
break;
case RTP_rtp_avp_tcp:
sprintf(s8Str + strlen(s8Str), "RTP/AVP/TCP;interleaved=%d-%d"RTSP_EL, \
pRtpSes->transport.u.tcp.interleaved.RTP, pRtpSes->transport.u.tcp.interleaved.RTCP);
break;
default:
break;
}
strcat(s8Str, RTSP_EL);
bwrite(s8Str, (unsigned short) strlen(s8Str), pRtsp);
return ERR_NOERROR;
}
/**************************************************************************************************
**
**
**
**************************************************************************************************/
int RTSP_setup(RTSP_buffer * pRtsp)
{
char s8TranStr[128], *s8Str;
char *pStr;
RTP_transport Transport;
int s32SessionID=0;
RTP_session *rtp_s, *rtp_s_prec;
RTSP_session *rtsp_s;
if ((s8Str = strstr(pRtsp->in_buffer, HDR_TRANSPORT)) == NULL)
{
fprintf(stderr, "Error %s,%i\n", __FILE__, __LINE__);
send_reply(406, 0, pRtsp); // Not Acceptable
printf("not acceptable");
return ERR_NOERROR;
}
//检查传输层子串是否正确
if (sscanf(s8Str, "%*10s %255s", s8TranStr) != 1)
{
fprintf(stderr,"SETUP request malformed: Transport string is empty\n");
send_reply(400, 0, pRtsp); // Bad Request
printf("check transport 400 bad request");
return ERR_NOERROR;
}
fprintf(stderr,"*** transport: %s ***\n", s8TranStr);
//如果需要增加一个会话
if ( !pRtsp->session_list )
{
pRtsp->session_list = (RTSP_session *) calloc(1, sizeof(RTSP_session));
}
rtsp_s = pRtsp->session_list;
//建立一个新会话，插入到链表中
if (pRtsp->session_list->rtp_session == NULL)
{
pRtsp->session_list->rtp_session = (RTP_session *) calloc(1, sizeof(RTP_session));
rtp_s = pRtsp->session_list->rtp_session;
}
else
{
for (rtp_s = rtsp_s->rtp_session; rtp_s != NULL; rtp_s = rtp_s->next)
{
rtp_s_prec = rtp_s;
}
rtp_s_prec->next = (RTP_session *) calloc(1, sizeof(RTP_session));
rtp_s = rtp_s_prec->next;
}
/*
printf("\tFile Name %s\n", Object);
if((rtp_s->file_id = open(Object, O_RDONLY)) < 0)
{
printf("Open File error %s, %d\n", __FILE__, __LINE__);
}
*/
//起始状态为暂停
rtp_s->pause = 1;
rtp_s->hndRtp = NULL;
Transport.type = RTP_no_transport;
if((pStr = strstr(s8TranStr, RTSP_RTP_AVP)))
{
//Transport: RTP/AVP
pStr += strlen(RTSP_RTP_AVP);
if ( !*pStr || (*pStr == ';') || (*pStr == ' '))
{
//单播