c语言创建udp和tcp socket
时间: 2023-08-13 22:37:13 浏览: 50
在C语言中,创建UDP和TCP Socket的代码如下:
## UDP
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int main() {
int sockfd;
struct sockaddr_in servaddr, cliaddr;
// 创建UDP Socket
sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
// 绑定Socket到本地IP地址和端口号
memset(&cliaddr, 0, sizeof(cliaddr));
cliaddr.sin_family = AF_INET;
cliaddr.sin_addr.s_addr = htonl(INADDR_ANY);
cliaddr.sin_port = htons(8080);
bind(sockfd, (struct sockaddr *)&cliaddr, sizeof(cliaddr));
// 加入多播组或者广播地址
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = inet_addr("224.0.0.1");
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
// 接收其他客户端发送的消息并显示在聊天窗口中
char buffer[1024];
int n;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(8080);
servaddr.sin_addr.s_addr = inet_addr("224.0.0.1");
while (1) {
n = recvfrom(sockfd, buffer, sizeof(buffer), 0, NULL, NULL);
buffer[n] = '\0';
printf("recv msg: %s\n", buffer);
}
// 关闭Socket
close(sockfd);
return 0;
}
```
## TCP
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int main() {
int sockfd;
struct sockaddr_in servaddr;
// 创建TCP Socket
sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// 建立连接并进行数据传输
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(8080);
servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
char buffer[1024];
while (1) {
// 接收其他客户端发送的消息并显示在聊天窗口中
memset(buffer, 0, sizeof(buffer));
recv(sockfd, buffer, sizeof(buffer), 0);
printf("recv msg: %s\n", buffer);
// 用户在聊天窗口中输入消息后,将消息通过TCP Socket发送给其他客户端
memset(buffer, 0, sizeof(buffer));
fgets(buffer, sizeof(buffer), stdin);
send(sockfd, buffer, strlen(buffer), 0);
}
// 关闭Socket
close(sockfd);
return 0;
}
```
以上是C语言创建UDP和TCP Socket的代码,具体实现细节需要根据实际情况进行调整。