服务器端:
/*
* File Name: socket_udp_server.c
* Author: eagle
* mail: [email protected]
* Created Time: 2015-10-08 18:43
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
int main(int argc, char *argv[])
{
int server_socketfd, client_socketfd;
int server_len,client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
int i,byte;
char recv[100], send[100];
//char recv, send;
/*hostip 本机ip地址*/
int inet_sock;
struct ifreq ifr;
char hostip[15];
inet_sock = socket(AF_INET, SOCK_DGRAM,0);
strcpy(ifr.ifr_name, "wlan0");
if (ioctl(inet_sock, SIOCGIFADDR, &ifr) < 0)
perror("ioctl");
strcpy(hostip, inet_ntoa(((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr));
/*上面部分为获取本机ip*/
server_socketfd = socket(AF_INET, SOCK_DGRAM, 0); //创建socket对象
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr("192.168.1.102"); //主机ip
server_address.sin_port = 9734; //主机端口
server_len = sizeof(server_address);
bind(server_socketfd, (struct sockaddr *) & server_address, server_len);
/* if((byte = recvfrom(server_socketfd, &recv, sizeof(recv), 0, //从客户端接受消息
(struct sockaddr *)&client_address, //存储客户端地址信息
(socklen_t *)&client_len)) == -1)
{
perror("recvfrom");
exit(EXIT_FAILURE);
}
printf("recv:%s\n", recv);
*/
/*client_address.sin_family = AF_INET;
client_address.sin_addr.s_addr = inet_addr("192.168.1.108"); //主机ip //这一段可以不写,上面已经接收了
client_address.sin_port = 9735; //主机端口 */ //客户端地址信息,直接发送即可
while(1){
if((byte = recvfrom(server_socketfd, &recv, sizeof(recv), 0, //从客户端接受消息
(struct sockaddr *)&client_address, //存储客户端地址信息
(socklen_t *)&client_len)) == -1)
{
perror("recvfrom");
exit(EXIT_FAILURE);
}
printf("recv:%s\n", recv);
//fflush(stdin);
//fflush(stdout);
printf("send:");
scanf("%s", send);
if((byte = sendto(server_socketfd, &send, sizeof(send), 0,
(struct sockaddr *)&client_address,
(socklen_t)client_len)) == -1)
{
perror("send");
exit(EXIT_FAILURE);
}
}
shutdown(client_socketfd, 2);
shutdown(server_socketfd, 2);
return 0;
}
客户端:
/*
* File Name: socket_udp_server.c
* Author: eagle
* mail: [email protected]
* Created Time: 2015-10-08 18:43
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
int main(int argc, char *argv[])
{
int socketfd;
int server_len,client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
int i,byte;
char recv[100], send[100];
//char recv, send;
/*hostip 本机ip地址*/
/*int inet_sock;
struct ifreq ifr;
char hostip[15];
inet_sock = socket(AF_INET, SOCK_DGRAM,0);
strcpy(ifr.ifr_name, "wlan0");
if (ioctl(inet_sock, SIOCGIFADDR, &ifr) < 0)
perror("ioctl");
strcpy(hostip, inet_ntoa(((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr));
*/ /*上面部分为获取本机ip*/
socketfd = socket(AF_INET, SOCK_DGRAM, 0); //创建socket对象
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr("192.168.1.102"); //主机ip
server_address.sin_port = 9734; //主机端口
server_len = sizeof(server_address);
client_address.sin_family = AF_INET;
client_address.sin_addr.s_addr = inet_addr("192.168.1.108"); //主机ip
client_address.sin_port = 9735; //主机端口
client_len = sizeof(client_address);
bind(socketfd, (struct sockaddr *) & client_address, client_len);
while(1){
printf("send:");
scanf("%s", send);
if((byte = sendto(socketfd, &send, sizeof(send), 0,
(struct sockaddr *)&server_address,
(socklen_t)server_len)) == -1)
{
perror("send");
exit(EXIT_FAILURE);
}
if((byte = recvfrom(socketfd, &recv, sizeof(recv), 0, //从客户端接受消息
(struct sockaddr *)&server_address, //存储客户端地址信息
(socklen_t *)&server_len)) == -1)
{
perror("recvprom");
exit(EXIT_FAILURE);
}
printf("recv:%s", recv);
}
shutdown(socketfd, 2);
return 0;
}