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| author | Lennart Poettering <lennart@poettering.net> | 2014-10-22 16:52:38 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2014-10-22 16:52:38 +0200 |
| commit | a5f035960006556beab51c42e6948985635e261a (patch) | |
| tree | bee22c1c99904edcc348117d784b2352a018a4b3 /src/shared/missing.h | |
| parent | 91c40d86120f3bf033539a53c971d99f5dd70708 (diff) | |
resolved: simplify detection of packets from the loopback device
We can simplify our code quite a bit if we explicitly check for the
ifindex being 1 on Linux as a loopback check. Apparently, this is
hardcoded on Linux on the kernel, and effectively exported to userspace
via rtnl and such, hence we should be able to rely on it.
Diffstat (limited to 'src/shared/missing.h')
| -rw-r--r-- | src/shared/missing.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/shared/missing.h b/src/shared/missing.h index a88d9e414b..bb4f8f23a8 100644 --- a/src/shared/missing.h +++ b/src/shared/missing.h @@ -527,3 +527,12 @@ static inline int setns(int fd, int nstype) { #ifndef BPF_XOR # define BPF_XOR 0xa0 #endif + +/* Note that LOOPBACK_IFINDEX is currently not exported by the + * kernel/glibc, but hardcoded internally by the kernel. However, as + * it is exported to userspace indirectly via rtnetlink and the + * ioctls, and made use of widely we define it here too, in a way that + * is compatible with the kernel's internal definition. */ +#ifndef LOOPBACK_IFINDEX +#define LOOPBACK_IFINDEX 1 +#endif |