server.c

tcp通讯源码

#include <stdio.h>
#include <string.h>
#include <netinet/in.h>

#define PORT 9999

main()
{
	struct sockaddr_in client,server;
	int s,ns,clientlen,recievelen;
	char buf[256];

	s=socket(AF_INET,SOCK_STREAM,0);
	memset((char *)&server,sizeof(server),0);
	server.sin_family=AF_INET;
	server.sin_port=htons(PORT);
	server.sin_addr.s_addr=INADDR_ANY;
	bind(s,(struct sockaddr *)&server,sizeof(server));
	listen(s,1);
	clientlen=sizeof(client);
	ns=accept(s,(struct sockaddr *)&client,&clientlen);
	for(;;)
	{
		recievelen=recv(ns,buf,sizeof(buf),0);
		if(recievelen==0)
			break;
		printf("对方说: %s\n",buf);
		send(ns,buf,recievelen,0);
	}
	close(ns);
	close(s);
}