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对不起,标题可能被迷惑的细节。例如,eth1代替br100。 因此eth1的ipv4地址为NULL。如何获得IP地址(IPv4为NULL,但IPv6是存在的),内容
的/ etc /网络/接口
br100 Link encap:Ethernet HWaddr 00:0c:29:75:e2:0a
inet addr:192.168.11.249 Bcast:192.168.11.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe75:e20a/64 Scope:Link
eth1 Link encap:Ethernet HWaddr 00:0c:29:75:e2:0a
inet6 addr: fe80::20c:29ff:fe75:e20a/64 Scope:Link
我该怎么做才能阅读时,我得到的eth1的IPv4的NULL
价值?
这里是我的getipv4
功能:
sIPv4 = new string[giIfaceCount];
struct ifaddrs *ifAddrStruct;
struct ifaddrs *ifa;
void *tmpAddrPtr;
if (getifaddrs(&ifAddrStruct) == -1)
{
perror("getifaddrs");
exit(1);
}
int iFlag4 = 0;
for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next)
{
if (ifa->ifa_addr->sa_family == AF_INET)
{
tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
char addressBuffer[1024];
if (strcmp(inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, 1024),"NULL") == 0)
{
cout << "addressBuffer = NULL" << endl;
}
else
{
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, 1024);
if (strcmp(ifa->ifa_name,"lo") == 0)
{
continue;
}
else
{
*(sIPv4+iFlag4) = addressBuffer;
testIPv4.append(addressBuffer);
testIPv4.append(" ");
iFlag4 = iFlag4+1;
}
}
}
}
标题的确令人困惑。我建议你再试一次。你更可能用一个描述性标题得到答案。 – EJP
检查eth1是否加入网桥组,然后检查以查看网桥组是否有配置的地址有什么问题? –