【网络编程】TCP通信基础模型实现

tcpSer.c

#include <myhead.h>
#define SER_IP "192.168.119.143" // 设置IP地址
#define SER_PORT 6666			 // 设置端口号
int main(int argc, const char *argv[])
{// 1.创建socketint serfd = socket(AF_INET, SOCK_STREAM, 0);// 参数1表示ipv4// 参数2表示tcp通信// 参数3表示通讯协议if (serfd == -1){perror("socket error");return -1;}// 将端口号快速重用int reuse = 1;if (setsockopt(serfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) == -1){perror("setsockopt error");return -1;}// 2.绑定信息struct sockaddr_in sin;sin.sin_family = AF_INET;				 // 设置通讯域sin.sin_port = htons(SER_PORT);			 // 设置端口号sin.sin_addr.s_addr = inet_addr(SER_IP); // 设置ip地址if (bind(serfd, (struct sockaddr *)&sin, sizeof(sin)) == -1){perror("bind error");return -1;}printf("bind success\n");// 3.设置为监听if (listen(serfd, 128)){perror("listen error");return -1;}printf("listen success\n");// 4.连接struct sockaddr_in cin;socklen_t socklen = sizeof(cin);int newfd = accept(serfd, (struct sockaddr *)&cin, &socklen);if (newfd == -1){perror("accept error");return -1;}printf("[%s:%d]accept success\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port));// 5.接收数据char buf[128] = "";while (1){// 数据初始化bzero(buf, sizeof(buf));int res = recv(newfd, buf, sizeof(buf), 0);if (res == -1){printf("读取失败\n");return -1;}else if (res == 0){printf("客户端以下线\n");return -1;}if (strcmp(buf, "quit") == 0){printf("服务端退出\n");break;}printf("[%s:%d]:%s\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), buf);bzero(buf, sizeof(buf));strcat(buf, "*-*");if (send(newfd, buf, sizeof(buf), 0) == -1){perror("send error");return -1;} // 回复消息printf("回复成功\n");}// 6.关闭close(newfd);return 0;
}

tcpCli.c

#include <myhead.h>
#define SER_IP "192.168.119.143"
#define SER_PORT 6666
#define CLI_IP "192.168.119.143"
#define CLI_PORT 8888
int main(int argc, const char *argv[])
{// 1.创建int clifd = socket(AF_INET, SOCK_STREAM, 0);if (clifd == -1){perror("socket error");return -1;}// 2.绑定struct sockaddr_in cin;cin.sin_family = AF_INET;cin.sin_port = htons(CLI_PORT);cin.sin_addr.s_addr = inet_addr(CLI_IP);if (bind(clifd, (struct sockaddr *)&cin, sizeof(cin)) == -1){perror("bind error");return -1;}printf("bind success\n");// 3.连接struct sockaddr_in sin;sin.sin_family = AF_INET;sin.sin_port = htons(SER_PORT);sin.sin_addr.s_addr = inet_addr(SER_IP);if (connect(clifd, (struct sockaddr *)&sin, sizeof(sin)) == -1){perror("connect error");return -1;}printf("connect success\n");// 4.数据收发char buf[128] = "";while (1){bzero(buf, sizeof(buf));printf("请输入>>>");fgets(buf, sizeof(buf), stdin);buf[strlen(buf) - 1] = 0;if (send(clifd, buf, sizeof(buf), 0) == -1){perror("send error");return -1;}if (strcmp(buf, "quit") == 0){printf("客户端退出\n");break;}printf("发送成功\n");bzero(buf, sizeof(buf));recv(clifd, buf, sizeof(buf), 0);printf("收到服务器的消息:%s\n", buf);}// 5.关闭close(clifd);return 0;
}

效果展示