Linux下判断网线是否插入的代码
2016-02-23 21:52
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Linux下判断网线是否插入的代码
参考ethtool-2.6.36.tar.gz 代码:
[guowenxue@localhost ~]$ sudo ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: yes
下面是剥离开来的专门用来探测网线的源代码:
[guowenxue@localhost ~]$ cat test.c
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <net/if.h>
#include <sys/utsname.h>
#include <limits.h>
#include <ctype.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <linux/sockios.h>
#define ETHTOOL_GLINK 0x0000000a /* Get link status (ethtool_value) */
struct ethtool_value {
unsigned int cmd;
unsigned int data;
};
int get_netlink_status(const char *if_name);
int main(int argc, char *argv[])
{
if (argc != 2)
{
fprintf(stderr, "usage: %s <ethname>\n", argv[0]);
return -1;
}
if (getuid() != 0)
{
fprintf(stderr, "Netlink Status Check Need Root user.\n");
return 1;
}
printf("Net link status: %s\n", get_netlink_status(argv[1]) == 1 ? "up" : "down");
return 0;
}
// if_name like "ath0", "eth0". Notice: call this function
// need root privilege.
// return value:
// -1 -- error , details can check errno
// 1 -- interface link up
// 0 -- interface link down.
int get_netlink_status(const char *if_name)
{
int skfd;
struct ifreq ifr;
struct ethtool_value edata;
edata.cmd = ETHTOOL_GLINK;
edata.data = 0;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name) - 1);
ifr.ifr_data = (char *)&edata;
if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) == 0)
return -1;
if (ioctl(skfd, SIOCETHTOOL, &ifr) == -1)
{
close(skfd);
return -1;
}
close(skfd);
return edata.data;
}
/tmp >: ifconfig
eth0 Link encap:Ethernet HWaddr 00:60:C2:69:06:B5
inet addr:10.78.28.114 Bcast:10.78.28.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 这里RUNNING可以看出eth1的网线插好了
RX packets:498 errors:0 dropped:0 overruns:0 frame:0
TX packets:117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:56899 (55.5 KiB) TX bytes:11718 (11.4 KiB)
Interrupt:111 Base address:0x6000
eth1 Link encap:Ethernet HWaddr 00:60:C2:69:06:B6
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1 这里可以看出eth1的网线没插入
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:21 Base address:0x4000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/tmp >: ./test eth0
Net link status: up
/tmp >: ./test eth1
Net link status: down
这段代码在AT91SAM9260+DM9000/DM9161上都能正常工作,但在W90P710上不能工作,可能是W90P710的DM9000的驱动有问题。
plain copy
Linux下判断网线是否插入的代码
参考ethtool-2.6.36.tar.gz 代码:
[guowenxue@localhost ~]$ sudo ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: yes
下面是剥离开来的专门用来探测网线的源代码:
[guowenxue@localhost ~]$ cat test.c
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <net/if.h>
#include <sys/utsname.h>
#include <limits.h>
#include <ctype.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <linux/sockios.h>
#define ETHTOOL_GLINK 0x0000000a /* Get link status (ethtool_value) */
struct ethtool_value {
unsigned int cmd;
unsigned int data;
};
int get_netlink_status(const char *if_name);
int main(int argc, char *argv[])
{
if (argc != 2)
{
fprintf(stderr, "usage: %s <ethname>\n", argv[0]);
return -1;
}
if (getuid() != 0)
{
fprintf(stderr, "Netlink Status Check Need Root user.\n");
return 1;
}
printf("Net link status: %s\n", get_netlink_status(argv[1]) == 1 ? "up" : "down");
return 0;
}
// if_name like "ath0", "eth0". Notice: call this function
// need root privilege.
// return value:
// -1 -- error , details can check errno
// 1 -- interface link up
// 0 -- interface link down.
int get_netlink_status(const char *if_name)
{
int skfd;
struct ifreq ifr;
struct ethtool_value edata;
edata.cmd = ETHTOOL_GLINK;
edata.data = 0;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name) - 1);
ifr.ifr_data = (char *)&edata;
if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) == 0)
return -1;
if (ioctl(skfd, SIOCETHTOOL, &ifr) == -1)
{
close(skfd);
return -1;
}
close(skfd);
return edata.data;
}
/tmp >: ifconfig
eth0 Link encap:Ethernet HWaddr 00:60:C2:69:06:B5
inet addr:10.78.28.114 Bcast:10.78.28.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 这里RUNNING可以看出eth1的网线插好了
RX packets:498 errors:0 dropped:0 overruns:0 frame:0
TX packets:117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:56899 (55.5 KiB) TX bytes:11718 (11.4 KiB)
Interrupt:111 Base address:0x6000
eth1 Link encap:Ethernet HWaddr 00:60:C2:69:06:B6
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1 这里可以看出eth1的网线没插入
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:21 Base address:0x4000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/tmp >: ./test eth0
Net link status: up
/tmp >: ./test eth1
Net link status: down
这段代码在AT91SAM9260+DM9000/DM9161上都能正常工作,但在W90P710上不能工作,可能是W90P710的DM9000的驱动有问题。
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