无法打开设备 eth0 : eth0: socket: Invalid argument

Question

我正在尝试使用一个简单的 DHCP client来自 GitHub。当我尝试运行此客户端时，它失败了

eth0 MAC : C8:6B:00:E5:52:5E
Couldn't open device eth0: eth0: socket: Invalid argument

有什么建议吗？谢谢!

Answer 1

显然 pcap_open_live() 返回 NULL。

pcap_open_live() returns a pcap_t * on success and NULL on failure. If NULL is returned, errbuf is filled in with an appropriate error message. errbuf may also be set to warning text when pcap_open_live() succeds; to detect this case the caller should store a zero-length string in errbuf before calling pcap_open_live() and display the warning to the user if errbufis no longer a zero-length string. errbufis assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.

您可能想要调查您的卡。

以root身份检查:

su -c "lspci | grep -i ether"

检查这个设备实际上是 eth0

/usr/sbin/ethtool -i eth0

和

dmesg | grep eth0