TCP消息通信(包括套接字中IP和端口读取方法)服务器和客户端的c代码
时间: 2023-05-15 07:07:58 浏览: 71
以下是一个简单的TCP消息通信服务器和客户端的C代码示例:
服务器端代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#define PORT 8888
int main(int argc, char const *argv[])
{
int server_fd, new_socket, valread;
struct sockaddr_in address;
int opt = 1;
int addrlen = sizeof(address);
char buffer[1024] = {0};
char *hello = "Hello from server";
// 创建socket
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0)
{
perror("socket failed");
exit(EXIT_FAILURE);
}
// 设置socket选项
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt)))
{
perror("setsockopt failed");
exit(EXIT_FAILURE);
}
// 绑定socket到指定端口
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0)
{
perror("bind failed");
exit(EXIT_FAILURE);
}
// 监听socket
if (listen(server_fd, 3) < 0)
{
perror("listen failed");
exit(EXIT_FAILURE);
}
// 接受客户端连接
if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t *)&addrlen)) < 0)
{
perror("accept failed");
exit(EXIT_FAILURE);
}
// 读取客户端发送的消息
valread = read(new_socket, buffer, 1024);
printf("%s\n", buffer);
// 发送消息给客户端
send(new_socket, hello, strlen(hello), 0);
printf("Hello message sent\n");
return 0;
}
```
客户端代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#define PORT 8888
int main(int argc, char const *argv[])
{
int sock = 0, valread;
struct sockaddr_in serv_addr;
char *hello = "Hello from client";
char buffer[1024] = {0};
// 创建socket
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("\n Socket creation error \n");
return -1;
}
// 设置服务器地址和端口
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(PORT);
// 将IPv4地址从点分十进制转换为二进制格式
if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0)
{
printf("\nInvalid address/ Address not supported \n");
return -1;
}
// 连接服务器
if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
{
printf("\nConnection Failed \n");
return -1;
}
// 发送消息给服务器
send(sock, hello, strlen(hello), 0);
printf("Hello message sent\n");
// 读取服务器发送的消息
valread = read(sock, buffer, 1024);
printf("%s\n", buffer);
return 0;
}
```
在这个示例中,服务器和客户端都使用了TCP协议进行通信。服务器先创建一个socket,然后将其绑定到指定的端口上,并开始监听客户端连接。当客户端连接到服务器时,服务器接受连接请求并读取客户端发送的消息,然后向客户端发送一条消息。客户端创建一个socket并连接到服务器,然后发送一条消息给服务器,并读取服务器发送的消息。