linux驱动.之 网络udp应用层测试工具demon（一）

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

客户端udp_client.c

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

 
#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 failed\n", __FUNCTION__);
		close(sock);
		return 0;
	}
	else
	printf("bind 198.18.36.3 success \r\n");
	
    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:%d\n", ret);
		usleep(200000);
	}
	
	close(sock);
	return 0;
}


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服务端udp_service.c

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

 
#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 failed\n", __FUNCTION__);
		close(sock);
		return 0;
	}
	else
	printf("bind 198.16.37.4 success \r\n");
	
	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:%d\n", ret);
	}
	
	close(sock);
	return 0;
}
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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。