1、
纯粹用来需要的时候c+v测试使用
来源在这
Server
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 1234
#define MAXDATASIZE 100
int main(void)
{
int sockfd;
struct sockaddr_in server;
struct sockaddr_in client;
socklen_t len;
int num;
char buf[MAXDATASIZE];
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{
perror("Creating socket failed.\n");
exit(1);
}
bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(sockfd, (struct sockaddr *)&server, sizeof(server)) == -1)
{
perror("Bind() error.\n");
exit(1);
}
len = sizeof(client);
while(1)
{
num = recvfrom(sockfd, buf, MAXDATASIZE, 0, (struct sockaddr *)&client, &len);
if(num < 0)
{
perror("recvfrom() error.\n");
exit(1);
}
buf[num] = '\0';
printf("You got a message <%s> from client. \nIt's ip is %s, port is %d. \n", buf, inet_ntoa(client.sin_addr),htons(client.sin_port));
sendto(sockfd, "Welcome\n", 8, 0, (struct sockaddr *)&client, len);
if ( !strcmp(buf, "bye") ){
break;
}
}
close(sockfd);
}
Client
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#define PORT 1234
#define MAXDATASIZE 100
int main(int argc, char *argv[])
{
int sockfd, num;
char buf[MAXDATASIZE];
struct hostent *he;
struct sockaddr_in server, peer;
if(argc != 3)
{
printf("Usage: %s <IP address> <message>\n", argv[0]);
exit(1);
}
if((sockfd=socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{
printf("socket() error\n");
exit(1);
}
bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr.s_addr = inet_addr(argv[1]);
//server.sin_addr.s_addr = inet_addr(argv[1]);
if(connect(sockfd, (struct sockaddr *)&server, sizeof(server)) == -1)
{
printf("connect() error.\n");
exit(1);
}
send(sockfd, argv[2], strlen(argv[2]), 0);
while(1)
{
if((num = recv(sockfd, buf, MAXDATASIZE, 0)) == -1)
{
printf("recv() error.\n");
exit(1);
}
buf[num] = '\0';
printf("Server Message: %s.\n", buf);
break;
}
close(sockfd);
}