diff options
| author | Francesco Ruggeri <fruggeri@arista.com> | 2019-11-01 03:44:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-11-04 04:25:18 +0300 |
| commit | 2adf81c0f7b04f9f10e55f5634b1eb7e0a783276 (patch) | |
| tree | 4f56f0697f2f8734d96576aeb40d5124001d3509 /kernel/resource.c | |
| parent | c219a1662276668a7b93afdf00320f543c58bbcb (diff) | |
| download | linux-2adf81c0f7b04f9f10e55f5634b1eb7e0a783276.tar.xz | |
net: icmp: use input address in traceroute
Even with icmp_errors_use_inbound_ifaddr set, traceroute returns the
primary address of the interface the packet was received on, even if
the path goes through a secondary address. In the example:
1.0.3.1/24
---- 1.0.1.3/24 1.0.1.1/24 ---- 1.0.2.1/24 1.0.2.4/24 ----
|H1|--------------------------|R1|--------------------------|H2|
---- N1 ---- N2 ----
where 1.0.3.1/24 is R1's primary address on N1, traceroute from
H1 to H2 returns:
traceroute to 1.0.2.4 (1.0.2.4), 30 hops max, 60 byte packets
1 1.0.3.1 (1.0.3.1) 0.018 ms 0.006 ms 0.006 ms
2 1.0.2.4 (1.0.2.4) 0.021 ms 0.007 ms 0.007 ms
After applying this patch, it returns:
traceroute to 1.0.2.4 (1.0.2.4), 30 hops max, 60 byte packets
1 1.0.1.1 (1.0.1.1) 0.033 ms 0.007 ms 0.006 ms
2 1.0.2.4 (1.0.2.4) 0.011 ms 0.007 ms 0.007 ms
Original-patch-by: Bill Fenner <fenner@arista.com>
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/resource.c')
0 files changed, 0 insertions, 0 deletions