如何检测IP地址冲突

[tanhf]

当我机器的IP地址与别的机器发生冲突时,在我的程序中怎么样才能知道

[kingzai]

枚举局域网内的IP地址，然后匹配，使用WNetOpenEnum，
WNetEnumResource

[xuying]

发送arp报文，查询内容是自己的ip，如果收到应答后，检查mac地址是否是自己的，如果不是，就是有Ip地址冲突，冲突者的mac地址就是你收到的报文中的mac地址。

[tanhf]

如何发送arp报文

[yybinliu]

使用ping来使一下

[xiaohu9711]

arp的用法：arp -s Ip地址
arp -a
详细的请你到Dos下查一下。

[tanhf]

我在程序里如何发送ARP包？

[kingzai]

http://www.opengram.com/ghost/arp_detect_sniffer.txt

[kingzai]

http://www.opengram.com/ghost/arp_detect_sniffer.txt

[xuying]

用iphlpapi函数中的SendARP()就可以了。

SendARP
The SendARP function sends an ARP request to obtain the physical address that corresponds to the specified destination IP address.

DWORD SendARP(
IPAddr DestIP, // destination IP address
IPAddr SrcIP, // IP address of sender
PULONG pMacAddr, // returned physical address
PULONG PhyAddrLen // length of returned physical addr.
);
Parameters
DestIP
[in] Specifies the destination IP address. The ARP request attempts to obtain the physical address that corresponds to this IP address.
SrcIP
[in] Specifies the IP address of the sender. This parameter is optional. The caller may specify zero for the parameter.
pMacAddr
[out] Pointer to a ULONG variable. This variable receives the physical address that corresponds to the IP address specified by the DestIP parameter.
PhyAddrLen
[out] Pointer to a ULONG variable. This variable contains the length of the physical address pointed to by the pMacAddr parameter.

[Lemon_2000]

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