diff options
| author | Paul Martin <paul.martin@codethink.co.uk> | 2015-02-11 11:50:28 +0000 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-02-11 12:57:17 +0100 |
| commit | 804319344bb9cab47532a9584f3e4383d53ea880 (patch) | |
| tree | a193c77616368f3f45ee5aaa0f6bcc02ffd916cc | |
| parent | b975b0d514321f169b3c4599a8ea92e13741b4e4 (diff) | |
networkd DHCPv4 logging endian fix
On Tue, Feb 10, 2015 at 08:10:43PM +0100, Lennart Poettering wrote:
> Hmm, I think it would be nicer to use be32toh() here instead, since it
> ensures the macro is (to a limited degree) typesafe.
>
> Any chance you could rework that?
From: Paul Martin <paul.martin@codethink.co.uk>
Date: Wed, 11 Feb 2015 11:47:16 +0000
Subject: [PATCH] networkd dhcpv4 logging endian fix
On a big-endian host, systemd-networkd prints out IPv4 network
addresses byte reversed:
Feb 10 16:43:32 hostname systemd-networkd[151]: eth0 : DHCPv4 address 158.1.24.10/16 via 1.1.24.10
The address obtained is 10.24.1.158/16 and the route is
10.24.0.0/16 dev eth0 src 10.24.1.187
The macro ADDRESS_FMT_VAL() unpacks a "struct in_addr" in a
little-endian specific manner.
This patch forces the passed address into host order, then unpacks it.
On an x86 later than i486, compiled with -O2, the only extra overhead
is a single bswap instruction.
| -rw-r--r-- | src/network/networkd-link.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h index 449dbc8846..cec158e47d 100644 --- a/src/network/networkd-link.h +++ b/src/network/networkd-link.h @@ -21,6 +21,8 @@ #pragma once +#include <endian.h> + #include "networkd.h" typedef enum LinkState { @@ -152,8 +154,8 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref); #define log_link_struct(link, level, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__) -#define ADDRESS_FMT_VAL(address) \ - (address).s_addr & 0xFF, \ - ((address).s_addr >> 8) & 0xFF, \ - ((address).s_addr >> 16) & 0xFF, \ - (address).s_addr >> 24 +#define ADDRESS_FMT_VAL(address) \ + be32toh((address).s_addr) >> 24, \ + (be32toh((address).s_addr) >> 16) & 0xFFu, \ + (be32toh((address).s_addr) >> 8) & 0xFFu, \ + be32toh((address).s_addr) & 0xFFu |