网络编程-socket编程服务端代码1

在Linux编程中，做一个双方可以聊天的一个代码，这个是服务端代码，

gcc  server.c -o server

./server ip 端口号 （一定要加ip地址和端口号）

端口号建议在5000-9999之间

#include <stdio.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main(int argc,char **argv){
        int s_fd;
	int c_fd;
       
	int n_read;
	char readBuf[128];

	
        int clen = sizeof(struct sockaddr_in);

	
	//char *rt="Hello,I get your message";
	char rt[128]={0};

	struct sockaddr_in s_addr;
	struct sockaddr_in c_addr;

	if(argc!=3){
		printf("param is not good\n");
		exit(-1);
	}

	memset(&s_addr,0,clen);
	memset(&c_addr,0,clen);

        //1.socket
        s_fd = socket(AF_INET,SOCK_STREAM,0);
        if(s_fd == -1){
                perror("socket");
                exit(-1);
        }

        s_addr.sin_family = AF_INET;
        s_addr.sin_port = htons(atoi(argv[2]));//htons
        inet_aton(argv[1],&s_addr.sin_addr);

        //2.bind
        bind(s_fd,(struct sockaddr *)&s_addr,clen);

        //3.listen
	listen(s_fd,10);

        //4.accept
	while(1){
		c_fd = accept(s_fd,(struct sockaddr *)&c_addr,&clen);
		if(c_fd == -1){
			perror("accept");
		}
		printf("get connect:%s\n",inet_ntoa(c_addr.sin_addr));

		if(fork() == 0){
			if(fork() == 0){
				memset(rt,0,sizeof(rt));
				printf("input: ");
				fgets(rt, sizeof(rt), stdin);//这里如果不行就换成gets(rt);
				//6.write
                write(c_fd,rt,strlen(rt));
			}	
        	//5.read
			memset(readBuf,0,sizeof(readBuf));
			n_read  = read(c_fd,readBuf,128);
			if(n_read == -1){
					perror("read");	
			}else{
				printf("get massage:%d,%s\n",n_read,readBuf);
				}
				break;
		}
	}
       	 return 0;
}