linux udp socket 进程间通讯代码
时间: 2023-09-17 09:05:58 浏览: 123
### 回答1:
很高兴为你解答,Linux UDP socket 进程间通讯代码是指使用UDP协议在Linux系统中实现进程间通讯的编码技术。它结合了Linux Socket API(应用程序编程接口)和UDP协议,可以让不同进程之间进行可靠的数据通讯。
### 回答2:
Linux下的UDP Socket进程间通信代码可以分为服务端和客户端两部分。
服务端代码示例:
```c
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#define PORT 12345
#define BUF_SIZE 1024
int main() {
int serverSocket, bytesReceived;
struct sockaddr_in serverAddr, clientAddr;
socklen_t addrSize = sizeof(clientAddr);
char buffer[BUF_SIZE];
// 创建套接字
serverSocket = socket(AF_INET, SOCK_DGRAM, 0);
memset(&serverAddr, '\0', sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(PORT);
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
// 绑定套接字
bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr));
printf("Server started...\n");
while (1) {
// 接收消息
bytesReceived = recvfrom(serverSocket, buffer, BUF_SIZE, 0, (struct sockaddr*)&clientAddr, &addrSize);
buffer[bytesReceived] = '\0';
printf("Received message from client: %s\n", buffer);
// 处理接收到的消息
// 发送响应消息
sendto(serverSocket, "Message received.", strlen("Message received."), 0, (struct sockaddr*)&clientAddr, addrSize);
}
return 0;
}
```
客户端代码示例:
```c
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#define PORT 12345
#define BUF_SIZE 1024
int main() {
int clientSocket;
struct sockaddr_in serverAddr;
socklen_t addrSize = sizeof(serverAddr);
char buffer[BUF_SIZE];
// 创建套接字
clientSocket = socket(AF_INET, SOCK_DGRAM, 0);
memset(&serverAddr, '\0', sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(PORT);
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
// 发送消息
sendto(clientSocket, "Hello from client.", strlen("Hello from client."), 0, (struct sockaddr*)&serverAddr, addrSize);
// 接收响应消息
recvfrom(clientSocket, buffer, BUF_SIZE, 0, (struct sockaddr*)&serverAddr, &addrSize);
printf("Received response from server: %s\n", buffer);
return 0;
}
```
以上代码演示了基于UDP Socket的简单进程间通信过程。服务端通过创建套接字、绑定套接字、循环接收消息,并对接收到的消息进行处理后,发送响应消息。客户端通过创建套接字,发送消息给服务端,并接收服务端的响应消息。
### 回答3:
Linux下使用UDP套接字进行进程间通信的代码如下:
```c
// 使用UDP套接字进行进程间通信的发送端代码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 8080
#define MAX_BUFFER_SIZE 1024
int main() {
int sockfd;
struct sockaddr_in servaddr;
char buffer[MAX_BUFFER_SIZE] = "Hello, UDP Server!"; // 要发送的数据
// 创建UDP套接字
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
perror("socket creation failed");
exit(EXIT_FAILURE);
}
memset(&servaddr, 0, sizeof(servaddr));
// 服务器信息配置
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(PORT);
servaddr.sin_addr.s_addr = INADDR_ANY;
// 向服务器发送数据
int n = sendto(sockfd, (const char *)buffer, strlen(buffer),
0, (const struct sockaddr *)&servaddr, sizeof(servaddr));
if (n == -1) {
perror("error in sendto");
exit(EXIT_FAILURE);
}
printf("Data sent to server: %s\n", buffer);
close(sockfd);
return 0;
}
```
```c
// 使用UDP套接字进行进程间通信的接收端代码
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 8080
#define MAX_BUFFER_SIZE 1024
int main() {
int sockfd;
struct sockaddr_in servaddr, clientaddr;
char buffer[MAX_BUFFER_SIZE];
int len, n;
// 创建UDP套接字
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
perror("socket creation failed");
exit(EXIT_FAILURE);
}
memset(&servaddr, 0, sizeof(servaddr));
memset(&clientaddr, 0, sizeof(clientaddr));
// 服务器信息配置
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(PORT);
servaddr.sin_addr.s_addr = INADDR_ANY;
// 服务器绑定地址和端口
if (bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) == -1) {
perror("bind failed");
exit(EXIT_FAILURE);
}
len = sizeof(clientaddr);
// 接收来自客户端的数据
n = recvfrom(sockfd, (char *)buffer, MAX_BUFFER_SIZE,
0, (struct sockaddr *)&clientaddr, &len);
buffer[n] = '\0';
printf("Data received from client: %s\n", buffer);
close(sockfd);
return 0;
}
```
以上是使用UDP套接字进行进程间通信的代码示例,发送端和接收端分别运行在不同的进程中。发送端通过`sendto()`函数向指定的服务端发送数据,接收端通过`recvfrom()`函数接收来自客户端的数据。在发送端代码中,需要指定目标服务器的IP地址和端口号;在接收端代码中,需要绑定一个地址和端口用以接收来自发送端的数据。
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