本文介绍: 绑定vlan,网卡的demon,如果有多个网卡,多个vlan,网卡的ip设置成一致,那就不能只简单绑定ip来创建socket,将两个程序编译成二进制执行程序,放到开发板运行,就行测试。服务端udp_service.c。客户端udp_client.c。
绑定vlan,网卡的demon,如果有多个网卡,多个vlan,网卡的ip设置成一致,那就不能只简单绑定ip来创建socket,
需要绑定网卡设备
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <errno.h>
#include <net/if.h>
#include <netinet/ether.h>
#include <netinet/in.h>
#include <netpacket/packet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#define BUF_SIZE 1024
#define INTERFAXENAME "mgbe3_0.14"
int sock;
int main(int argc, char *argv[])
{
int ret = 0;
char buf[1024];
memset(buf,1,1024);
if ( (sock=socket(AF_INET, SOCK_DGRAM, 0)) <0)
{
perror("socket");
exit(1);
}
struct ifreq interface;
strncpy(interface.ifr_ifrn.ifrn_name, INTERFAXENAME, sizeof(INTERFAXENAME));
if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, (char *)&interface, sizeof(interface)) < 0) // 绑定vlan网卡设备
{
perror("SO_BINDTODEVICE failed");
}
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(31004);
addr.sin_addr.s_addr = inet_addr("198.18.36.3");
ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
if (ret < 0) {
printf("%s: bind 198.18.36.3 failedn", __FUNCTION__);
close(sock);
return 0;
}
else
printf("bind 198.18.36.3 success rn");
struct sockaddr_in server_addr;
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(31004);
server_addr.sin_addr.s_addr = inet_addr("198.18.36.1");
while(1)
{
ret = sendto(sock, buf, 1024, 0,(struct sockaddr *)&server_addr, sizeof(server_addr));
printf("sendto 198.18.36.1 ret:%dn", ret);
usleep(200000);
}
close(sock);
return 0;
}
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <errno.h>
#include <net/if.h>
#include <netinet/ether.h>
#include <netinet/in.h>
#include <netpacket/packet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#define BUF_SIZE 1024
#define INTERFAXENAME "mgbe3_0.14"
int sock;
int main(int argc, char *argv[])
{
int ret = 0;
char buf[1024];
memset(buf,1,1024);
if ( (sock=socket(AF_INET, SOCK_DGRAM, 0)) <0)
{
perror("socket");
exit(1);
}
struct ifreq interface;
strncpy(interface.ifr_ifrn.ifrn_name, INTERFAXENAME, sizeof(INTERFAXENAME));
if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, (char *)&interface, sizeof(interface)) < 0) // 绑定vlan网卡设备
{
perror("SO_BINDTODEVICE failed");
}
struct sockaddr_in server_addr;
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(31004);
server_addr.sin_addr.s_addr = inet_addr("198.16.37.4");
ret = bind(sock, (struct sockaddr *)&server_addr, sizeof(server_addr));
if (ret < 0)
{
printf("%s: bind 198.16.37.4 failedn", __FUNCTION__);
close(sock);
return 0;
}
else
printf("bind 198.16.37.4 success rn");
struct sockaddr_in client_addr;
socklen_t len;
len = sizeof(client_addr);
while(1)
{
ret = recvfrom(sock, buf, 1024, 0,(struct sockaddr *)&client_addr, &len);
printf("recvfrom 198.16.37.3 ret:%dn", ret);
}
close(sock);
return 0;
}
原文地址:https://blog.csdn.net/rjszcb/article/details/134534236
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