Bug 237391
| Summary: | route get returns no result for network addresses (netmask portion of address is zero) | ||
|---|---|---|---|
| Product: | Base System | Reporter: | bugs.freebsd.org |
| Component: | bin | Assignee: | Alexander V. Chernikov <melifaro> |
| Status: | Closed FIXED | ||
| Severity: | Affects Some People | CC: | bugs.freebsd.org, melifaro, net, rgrimes |
| Priority: | --- | Keywords: | needs-qa |
| Version: | CURRENT | Flags: | koobs:
mfc-stable12?
koobs: mfc-stable11? |
| Hardware: | Any | ||
| OS: | Any | ||
Reproduces on CURRENT; more accurately, it's related to the address being a "network address", the one address where the netmask portion is zero. There exist trailing-zero(s) addresses that are not "network addresses", such as 1.1.0.0/8 (masked portion is non-zero 0.1.0.0). Confirmed all the back to 5.4p8:
route -n get 10.0.0.0
route: writing to routing socket: No such process
pdx.rh.CN85.dnsmgr.net:root {650}# uname -a
FreeBSD pdx.rh.CN85.dnsmgr.net 5.4-RELEASE-p8 FreeBSD 5.4-RELEASE-p8 #0: Wed Sep 21 16:17:14 PDT 2016
{651}# route -n get 10.0.0.1
route to: 10.0.0.1
destination: default
mask: default
gateway: 192.168.114.4
interface: lnc1
flags: <UP,GATEWAY,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
0 0 0 0 0 0 1500 0
I suspect this is miss application of IN_CLASS{ABCD} macros in trying to pick a default netmask for 10.0.0.0 and then not finding an exact route match for 10.0.0.0/8 and so assuming that there is not a broader route. Bug is most likely purely in the route(8) binary.
mfc flags open/requested (?) until merged Raised https://reviews.freebsd.org/D24401 with a proposed change. Committed as https://cgit.freebsd.org/src/commit/sbin/route/route.c?id=d28210b2c2aaf3200907ed30d296b0d4856dd03c The issue should be fixed. Given that's the user-visible behaviour change, there will be no 11/12 backport. I'm going to close this PR, please do reopen if current/FreeBSD 13 still behave in undesired way. |
For example: route -n get 1.0.0.0 route: route has not been found route -n get 1.0.0.1 route to: 1.0.0.1 destination: 0.0.0.0 mask: 0.0.0.0 gateway: 10.146.1.1 fib: 0 interface: re1 flags: <UP,GATEWAY,DONE,STATIC> recvpipe sendpipe ssthresh rtt,msec mtu weight expire 0 0 0 0 1500 1 0 route -n get 223.0.0.0 route: route has not been found route -n get 223.0.0.1 route to: 223.0.0.1 destination: 0.0.0.0 mask: 0.0.0.0 gateway: 10.146.1.1 fib: 0 interface: re1 flags: <UP,GATEWAY,DONE,STATIC> recvpipe sendpipe ssthresh rtt,msec mtu weight expire 0 0 0 0 1500 1 0