我需要一段纯IPv4网络客户端向IPv6服务器端发送消息的C代码
时间: 2024-05-08 21:20:59 浏览: 90
客户端和服务器通信C语言源代码
以下是一段纯IPv4网络客户端向IPv6服务器端发送消息的C代码:
```c
#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>
#include <unistd.h>
#include <netdb.h>
#define SERVER_IP "2001:db8:0:1234::1" // IPv6服务器IP地址
#define SERVER_PORT 8080 // 服务器端口号
int main() {
int sockfd, ret;
struct sockaddr_in6 serverAddr;
char buffer[1024];
sockfd = socket(AF_INET6, SOCK_STREAM, 0);
if (sockfd < 0) {
printf("Error creating socket!\n");
exit(1);
}
printf("Socket created...\n");
memset(&serverAddr, 0, sizeof(serverAddr));
serverAddr.sin6_family = AF_INET6;
serverAddr.sin6_port = htons(SERVER_PORT);
inet_pton(AF_INET6, SERVER_IP, &serverAddr.sin6_addr);
ret = connect(sockfd, (struct sockaddr*)&serverAddr, sizeof(serverAddr));
if (ret < 0) {
printf("Error connecting to server!\n");
exit(1);
}
printf("Connected to server...\n");
while (1) {
printf("Enter message to send (or type 'exit' to quit): ");
fgets(buffer, sizeof(buffer), stdin);
if (strcmp(buffer, "exit\n") == 0) {
close(sockfd);
printf("Goodbye!\n");
exit(0);
} else {
send(sockfd, buffer, strlen(buffer), 0);
memset(buffer, 0, sizeof(buffer));
recv(sockfd, buffer, sizeof(buffer), 0);
printf("Server response: %s", buffer);
}
}
return 0;
}
```
需要注意的是,IPv4和IPv6是不同的协议,如果要使用IPv4网络客户端与IPv6服务器通信,需要使用IPv6套接字并将IPv6地址转换为网络字节顺序。在上面的代码中,我们使用了`inet_pton()`函数将IPv6地址转换为网络字节顺序。另外,如果服务器是IPv4地址,那么就需要使用IPv4套接字,相应地修改代码即可。
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