socket简单应用服务端代码（原创）tcp c/s

server.c:

 

#include
#include
#include //perror错误输出
#include
#include
#include
#include
#include
#include
#include

#define PORT        8999
#define MAXSIZE     (8 * 4096)

int main(int argc, char *argv[])
{
    int sockfd, peer, len;
    struct sockaddr_in serv_addr, clnt_addr;
    char recvmsg[MAXSIZE], sendmsg[MAXSIZE];
       
    sockfd = socket(AF_INET, SOCK_STREAM, 0);//创建socket
    if (sockfd < 0) {
        perror("socket error");
        return -1;
    }
 /*  配置socket */
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    bzero(&(serv_addr.sin_zero), 8);
 
 /* 绑定socket */
    if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr)) < 0) {
        perror("bind err");
        return -1;
    }
   
    /* 主动socket转为被动监听socket */
    if (listen(sockfd, 1) < 0) {
        perror("listen error");
        return -1;
    }
   
    /* 循环监听 */
    len = sizeof(clnt_addr);
    while (1) {
     printf("begin to accept\n");
        peer = accept(sockfd, (struct sockaddr *)&clnt_addr, &len);/* 接收连接 */
        if (peer < 0) {
            perror("Server: accept failed.\n");
            continue;
        }

        memset(recvmsg, 0, MAXSIZE);
        memset(sendmsg, 0, MAXSIZE);
  if (read(peer, recvmsg, sizeof(recvmsg)) < 0) {
   perror("recv err");
            break;
        }

        printf("client: %s\n", recvmsg);
        if (!strcmp(recvmsg, "quit")) {
            printf("close a connection\n");
            break;
        }

        strcpy(sendmsg, "I get your req");
        write(peer, sendmsg, strlen(sendmsg) + 1);

        close(peer);
    }

    return 0;
}