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unix 网络编程udp简单例程

发表于：2025-12-02 作者：千家信息网编辑

千家信息网最后更新 2025年12月02日，server.c#include /* See NOTES */#include #include #include #include #include #include #includ

千家信息网最后更新 2025年12月02日unix 网络编程udp简单例程

server.c
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <unistd.h>
int main(int argc, char** argv)
{
int ret;
int len = sizeof(struct sockaddr);
//创建socket
int sockfd = socket(AF_INET, SOCK_DGRAM,0);
if(sockfd == -1)
{
perror("socket\n");
exit(1);
}
//将addr地址与socket绑定在一起
//初始化地址
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(4444);
addr.sin_addr.s_addr = INADDR_ANY;
memset(addr.sin_zero,8,0);
//进行绑定
ret = bind(sockfd, (struct sockaddr*)&addr, len);
if(ret == -1)
{
perror("bind\n");
exit(1);
}
//接收数据
struct sockaddr_in addr_client;
while(1)
{
char buf[100];
memset(buf,100,0);
socklen_t length = sizeof(struct sockaddr);
fputs("等待数据。。。。\n",stdout);
ssize_t recnum = recvfrom(sockfd, buf, 100,MSG_WAITALL, (struct sockaddr*)&addr_client,&length);
if(recnum<0)
{
perror("recvfrom\n");
exit(1);
}
printf("received(%d): %s\n",recnum,buf);
if(strcmp(buf,"stop") == 0)
{
break;
}
}
close(sockfd);
fputs("退出成功！！\n",stdout);
return 0;
}
----------------------------
client.c
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <unistd.h>
int main(int argc, char** argv)
{
int len = sizeof(struct sockaddr);
//创建socket
int sockfd = socket(AF_INET, SOCK_DGRAM,0);
if(sockfd == -1)
{
perror("socket\n");
exit(1);
}
//将addr地址与socket绑定在一起
//初始化地址
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(4444);
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
memset(addr.sin_zero,8,0);
while(1)
{
char buf[100];
memset(buf,100,0);
fputs("请输入内容：\n",stdout);
//存在scanf字符串空格问题
scanf("%s",buf);
fputs("确认发送内容为：\n",stdout);
fputs(buf,stdout);
printf("\n");
sendto(sockfd, buf, 100, 0, (struct sockaddr*)&addr, len);
fputs("确认发送完成\n",stdout);
}
return 0;
}
----------------------------
makefile
.PHONY: all clean
all:server client
server:server.c
gcc -o server server.c -Wall
client:client.c
gcc -o client client.c -Wall
clean:
rm -f *.o client server *~