ser_basic.c

#include<stdio.h>
#include<sys/socket.h>
#include<unistd.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<string.h>
#include<assert.h>
#include<pthread.h>
#include<sys/types.h>
int create_sock()
{
	int sockfd=socket(AF_INET,SOCK_STREAM,0);
	if(sockfd<0)
	{
		return -1;		
	}
	struct sockaddr_in saddr;
	memset(&saddr,0,sizeof(saddr));
	saddr.sin_family=AF_INET;
	saddr.sin_port=htons(6000);
	saddr.sin_addr.s_addr=inet_addr("127.0.0.1");
	int res=bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
	if(res<0)
	{
		perror("bind error");
		return -1;
	}
	listen(sockfd,5);
	return sockfd;
}
void * thread_fun(void *args)
{
	int c=(int)args;
	char buff[128]={0};
	while(1)
	{
		recv(c,buff,128,0);
		if(strncmp(buff,"end",3)==0)
		{
			break;
		}
		printf("buff=%s",buff);
		send(c,"ok",2,0);

	}
	pthread_exit(0);
}


int main()
{
		int sockfd=create_sock();
		if(sockfd<0)
		{
			perror("socket create error");
		}
		while(1)
		{
			struct sockaddr_in caddr;
			int len=sizeof(caddr);
			int c=accept(sockfd,(struct sockaddr*)&caddr,&len);
			{
				if(c<0)
				{
					continue;
				}
				pthread_t id;
				pthread_create(&id,NULL,thread_fun,(void*)c);
			}
		}
		return 0;
}