I currently cannot access the local IP of an interface on rdomain 1:
Script started on Fri Oct 28 15:02:20 2016
$ doas pfctl -d
pfctl: pf not enabled
$ doas ifconfig vether0
vether0: no such interface
$ doas ifconfig vether0 rdomain 1
$ doas ifconfig vether0 inet 192.168.42.2
$ doas ifconfig vether0
vether0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> rdomain 1 mtu 1500
lladdr fe:e1:ba:d1:73:55
index 7 priority 0 llprio 3
groups: vether
media: Ethernet autoselect
status: active
inet 192.168.42.2 netmask 0xffffff00 broadcast 192.168.42.255
$ route -T1 -n show -inet
Routing tables
Internet:
Destination Gateway Flags Refs Use Mtu Prio Iface
192.168.42/24 192.168.42.2 UCn 0 0 - 4 vether0
192.168.42.2 fe:e1:ba:d1:73:55 UHLl 0 0 - 1 vether0
192.168.42.255 192.168.42.2 UHb 0 0 - 1 vether0
$ ping -V1 192.168.42.2
PING 192.168.42.2 (192.168.42.2): 56 data bytes
^C
--- 192.168.42.2 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
$ ^D
Script done on Fri Oct 28 15:04:16 2016
Connecting to other boxes via routes on rdomain 1 works as usual
(not shown in the script output above).
I tracked the problem to being caused by v1.455 of if.c. It seems
that ifp->if_rdomain == 0 when running the ping above. In this case,
m->m_pkthdr.ph_rtableid should be set back to 1 after the reset
though (as it was before m_resethdr(m)). Shouldn't ifp->if_rdomain
be equal to 1 in this case? If yes, there must be a bug earlier in
the code.
The following diff fixes things for me, but I don't know if
ifp->if_rdomain isn't the one that needs to be fixed:
Index: net/if.c
===================================================================
RCS file: /cvs/src/sys/net/if.c,v
retrieving revision 1.456
diff -u -r1.456 if.c
--- net/if.c 19 Oct 2016 02:05:49 -0000 1.456
+++ net/if.c 28 Oct 2016 13:46:02 -0000
@@ -649,6 +649,7 @@
if_input_local(struct ifnet *ifp, struct mbuf *m, sa_family_t af)
{
struct niqueue *ifq = NULL;
+ u_int rtableid = m->m_pkthdr.ph_rtableid;
#if NBPFILTER > 0
/*
@@ -667,7 +668,7 @@
#endif
m_resethdr(m);
m->m_pkthdr.ph_ifidx = ifp->if_index;
- m->m_pkthdr.ph_rtableid = ifp->if_rdomain;
+ m->m_pkthdr.ph_rtableid = rtableid;
ifp->if_opackets++;
ifp->if_obytes += m->m_pkthdr.len;
