Android机顶盒网络地址端口连通性测试
一般我们使用如下三种方式进行测试,前一种不满足则执行下一种:
- 1、外网可以访问时可以使用telnet直接进行ip及端口测试;
- 2、外网无法访问只有机顶盒可以访问时可以使用busybox telnet进行测试;
- 3、当外网无法访问且机顶盒不具备busybox telnet时可以使用我们开发的C工具进行测试,目前已经交叉编译适配机顶盒;
1、直接telnet
telnet host port
如图所示:
2、busybox telnet
busybox telnet ip port
似乎是不支持域名的:
3、测试工具
在网上找了一个,简单的C写的socket通信,使用select进行监听:
https://blog.csdn.net/pipalcn/article/details/83940054
#include <stdio.h>
#include <strings.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
//#include <arpa/inet.h>
#include <netinet/in.h>
#include <errno.h>
#include <netdb.h>
#define TIMEOUT 5
/*
FileName:testConn.c
functions:test host:port which specified whether is alive.
call:testConn hostname port
return values:
0 :connected.
1:arguments err.
2:port number illegal.
3:gethostname err.
4:network setup err.
5:Connect server timeout.
*/
int main(int argc, char **argv)
{
if (argc != 3)
{
printf("error:Usage: %s host port.\nExample: %s 192.168.0.1 21\n", argv[0], argv[0]);
exit(1);
}
int portnumber = 0;
if ((portnumber = atoi(argv[2])) < 0)
{
fprintf(stderr, "error:port number[%s] is illegal.\n", argv[0]);
exit(2);
}
struct hostent *host;
if ((host = gethostbyname(argv[1])) == NULL)
{
fprintf(stderr, "error:Gethostname error\n");
exit(3);
}
int sockfd, flags, res;
struct sockaddr_in servaddr;
fd_set fdr, fdw;
struct timeval timeout;
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
perror("error:Netwrok error...\n");
return 4;
}
/* set socket fd noblock */
if ((flags = fcntl(sockfd, F_GETFL, 0)) < 0)
{
perror("error:Netwrok error...\n");
close(sockfd);
return 4;
}
if (fcntl(sockfd, F_SETFL, flags | O_NONBLOCK) < 0)
{
perror("error:Network error...\n");
close(sockfd);
return 4;
}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
//inet_pton(AF_INET, argv[1], &servaddr.sin_addr);
servaddr.sin_addr = *((struct in_addr *)host->h_addr);
servaddr.sin_port = htons(portnumber);
if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) != 0)
{
if (errno != EINPROGRESS)
{ // EINPROGRESS
perror("error:Network err....\n");
close(sockfd);
return 4;
}
}
else
{
printf("Connected\n");
return 0;
}
FD_ZERO(&fdr);
FD_ZERO(&fdw);
FD_SET(sockfd, &fdr);
FD_SET(sockfd, &fdw);
timeout.tv_sec = TIMEOUT;
timeout.tv_usec = 0;
res = select(sockfd + 1, &fdr, &fdw, NULL, &timeout);
if (res < 0)
{
perror("error:Network error...\n");
close(sockfd);
return 4;
}
if (res == 0)
{
printf("error:Connect server timeout\n");
close(sockfd);
return 5;
}
if (res == 1)
{
if (FD_ISSET(sockfd, &fdw))
{
printf("Connected\n");
close(sockfd);
return 0;
}
}
/* Not necessary */
if (res == 2)
{
printf("error:Connect server timeout\n");
close(sockfd);
return 5;
}
printf("error:Connect server timeout\n");
close(sockfd);
return 5;
}
之后我们将其交叉编译后放到Android机顶盒中运行即可: