Il giorno Tue, Sep 02, 2003 at 08:00:31PM +0200, pare che Daniele Bellucci abbia scritto:
> On Tue, Sep 02, 2003 at 07:45:35PM +0200, mato wrote:
> |
> |Hi,
> |
> |
> |you can try this command:
> | grep -r \\\"getifaddrs\\\" /usr/src/linux
> |Sorry, this command is ok. (no get -r ....) but grep -r ....
>
>
> When you search for "something" in a source kernel tree
> its find to use the following:
>
> find /usr/src/linux-`uname -r`/ -name \*.[ch] -exec grep -nH "something" {} \;
getifaddrs(3) is a library function, implemented through ioctl calls [1].
The ioctl calls are handled by the code of net/core/dev.c See, for
example, http://lxr.linux.no/source/net/core/dev.c?v=2.4.21#L2232
Have a look here for a man page describing getifaddrs:
http://sources.redhat.com/ecos/docs-latest/ref/net-common-tcpip-manpages-getifaddrs.html
HTH,
Marco
[1] An strace of a simple program that calls getifaddrs and exits
shows:
[some uninteresting stuff here]
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
ioctl(3, 0x8912, 0xbffff820) = 0
ioctl(3, 0x8913, 0x804a008) = 0
ioctl(3, 0x891b, 0x804a008) = 0
ioctl(3, 0x8919, 0x804a008) = 0
ioctl(3, 0x8913, 0x804a028) = 0
ioctl(3, 0x891b, 0x804a028) = 0
ioctl(3, 0x8919, 0x804a028) = 0
[more uninteresting stuff here]
and /usr/include/bits/ioctls.h includes the following #defines:
#define SIOCGIFCONF 0x8912 /* get iface list */
#define SIOCGIFFLAGS 0x8913 /* get flags */
#define SIOCGIFNETMASK 0x891b /* get network PA mask */
#define SIOCGIFBRDADDR 0x8919 /* get broadcast PA address */
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