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c++ - .c编程如何在客户端和服务器之间建立sip session

转载 作者:行者123 更新时间:2023-11-30 17:49:27 25 4
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这是客户端服务器应用程序,我想在客户端和服务器之间建立 SIP(​​ session 启动协议(protocol))。

所以请任何人指导我如何做到这一点。

<小时/>

服务器.c:

<小时/>
#include  <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
#include <netinet/tcp.h>

#define MYPORT 3490 // the port users will be connecting to
#define BACKLOG 10 // how many pending connections queue will hold
#define MAXDATASIZE 100

void str_server(int);

void sigchld_handler(int s)
{
while(waitpid(-1, NULL, WNOHANG) > 0);
}
int main(void)
{
int sockfd, numbytes,new_fd, optlen; // listen on sock_fd, new connection on new_fd
struct sockaddr_in my_addr; // my address information
struct sockaddr_in their_addr; // connector's address information
struct tcp_info info;
socklen_t sin_size;
struct sigaction sa;
char buf[MAXDATASIZE];
int yes=1;
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
perror("setsockopt");
exit(1);
}
my_addr.sin_family = AF_INET; // host byte order
my_addr.sin_port = htons(MYPORT); // short, network byte order
my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) == -1) {
perror("bind");
exit(1);
}
if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
}
sa.sa_handler = sigchld_handler; // reap all dead processes
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
perror("sigaction");
exit(1);
}
while(1) { // main accept() loop
sin_size = sizeof their_addr;
getchar();
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, \
&sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n", \
inet_ntoa(their_addr.sin_addr));

if (!fork()) { // this is the child process
close(sockfd); // child doesn't need the listener
if ((numbytes=recv(new_fd, buf, MAXDATASIZE-1, 0)) == -1) {
perror("recv");
exit(1);
}
buf[numbytes] = '\0';
printf("Received From Client: %s\n",buf);

str_server(sockfd);
FILE *fp = fopen( "adventure.mpg", "rb" );
//if(!fork())
// execlp("gedit", "gedit", "SIPFILE.txt", NULL);
//system("popen /home/umair/Documents/CurrentData/SIPFILE.txt");
//ShellExecute(GetDesktopWindow(), "open","ls /home/umair/Documents

/CurrentData/SIPFILE.txt",NULL, NULL, SW_SHOW);
if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(new_fd);
exit(0);
}
close(new_fd); // parent doesn't need this

}
return 0;
}

void str_server(int sock)
{
char buf[1025];
const char* filename = "test.text";
FILE *file = fopen(filename, "rb");
if (!file)
{
printf("Can't open file for reading");
return;
}
while (!feof(file))
{
int rval = fread(buf, 1, sizeof(buf), file);
if (rval < 1)
{
printf("Can't read from file");
fclose(file);
return;
}

int off = 0;
do
{
int sent = send(sock, &buf[off], rval - off, 0);
if (sent < 1)
{
// if the socket is non-blocking, then check
// the socket error for WSAEWOULDBLOCK/EAGAIN
// (depending on platform) and if true then
// use select() to wait for a small period of
// time to see if the socket becomes writable
// again before failing the transfer...

printf("Can't write to socket");
fclose(file);
return;
}

off += sent;
}
while (off < rval);
}

fclose(file);
}
<小时/>

//client.c:

<小时/>
#include  <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#define PORT 3490 // the port client will be connecting to
#define MAXDATASIZE 100 // max number of bytes we can get at once

void RecvFile(int , const char* );
FILE *filename;

int main(int argc, char *argv[])
{
int sockfd, numbytes, optlen;
char buf[MAXDATASIZE];
char *message;
struct hostent *he;
struct tcp_info info;
struct sockaddr_in their_addr; // connector's address information
if (argc != 2) {
fprintf(stderr,"usage: client hostname\n");
exit(1);
}
if ((he=gethostbyname(argv[1])) == NULL) { // get the host info
herror("gethostbyname");

exit(1);
}
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
their_addr.sin_family = AF_INET; // host byte order
their_addr.sin_port = htons(PORT); // short, network byte order
their_addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);
if (connect(sockfd, (struct sockaddr *)&their_addr,
sizeof their_addr) == -1) {
perror("connect");
exit(1);
}
printf("connect successfull\n");
/* if (send(sockfd, "Hello, world!\n", 14, 0) == -1)
perror("send");
printf("send successfull\n");
*/
message = "GET /?st=1 HTTP/1.1\r\nHost: www.msn.com\r\n\r\n";
if( send(sockfd , message , strlen(message) , 0) < 0)
{
puts("Send failed");
return 1;
}
puts("Data Send\n");
RecvFile(sockfd , message);

optlen = sizeof(info);
if ((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) {
perror("recv");
exit(1);
}
buf[numbytes] = '\0';
printf("Received: %s\n",buf);
close(sockfd);

return 0;
}


void RecvFile(int sock, const char* filename)
{
int rval;
char buf[0x1000];
FILE *file = fopen(filename, "wb");
if (!file)
{
printf("Can't open file for writing");
return;
}

do
{
rval = recv(sock, buf, sizeof(buf), 0);
if (rval < 0)
{
// if the socket is non-blocking, then check
// the socket error for WSAEWOULDBLOCK/EAGAIN
// (depending on platform) and if true then
// use select() to wait for a small period of
// time to see if the socket becomes readable
// again before failing the transfer...

printf("Can't read from socket");
fclose(file);
return;
}

if (rval == 0)
break;

int off = 0;
do
{
int written = fwrite(&buf[off], 1, rval - off, file);
if (written < 1)
{
printf("Can't write to file");
fclose(file);
return;
}

off += written;
}
while (off < rval);
}
while (!feof(file));
fclose(file);
}

Any Suggestion?

最佳答案

我不确定您想用 SIP 做什么,但您提供的代码片段仅显示建立 TCP/IP 连接。如果您打算开发 SIP 服务器-客户端应用程序,我建议您寻找一个库来帮助您完成此过程。

据我所知,非常完整的一个称为 Sofia SIP:

http://sofia-sip.sourceforge.net/

它是诺基亚用C语言为Linux编写的。

源代码可在此处获取:http://gitorious.org/sofia-sip/sofia-sip/trees/master

(旧版 http://sourceforge.net/p/sofia-sip/git/ci/master/tree/ )

关于c++ - .c编程如何在客户端和服务器之间建立sip session ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17832891/

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