diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2023-04-15 18:00:34 +0000 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2023-04-15 18:00:34 +0000 |
| commit | a4fa14a9d8f604d3e1eb409091b4f0d879f9cf97 (patch) | |
| tree | 025f770c4e149e7aceb29218e0530f5906ef8678 /sys/src/9/ip/ethermedium.c | |
| parent | b76d35401c0a056911aa192d4e4e6d86a15efa50 (diff) | |
ip: generalize Rproxy route handling, allowing non point-to-point arp proxy
Generalize the arp proxy code, so one can create
specific routes for ip ranges that we want to arp
proxy for, not just for point-to-point interface
routes.
as we have source specific routes, this also
gives some control over which requester we will
reply to.
one example for this is a vps where we booked
another ip address on the ethernet, that we want
to route into a vpn tunnel. the new ip is in
subnet of the public ethernet interface, so all
we now need todo is add a route for that ip into
the vpn tunnel and set the proxy flag "y", and
we will respond to arp for that ip on the public
ethernet interface.
Diffstat (limited to 'sys/src/9/ip/ethermedium.c')
| -rw-r--r-- | sys/src/9/ip/ethermedium.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/sys/src/9/ip/ethermedium.c b/sys/src/9/ip/ethermedium.c index 999a65b5f..b2e04947a 100644 --- a/sys/src/9/ip/ethermedium.c +++ b/sys/src/9/ip/ethermedium.c @@ -508,7 +508,6 @@ recvarp(Ipifc *ifc) int forme; Block *ebp, *rbp; Etherarp *e, *r; - uchar ip[IPaddrlen]; static uchar eprinted[4]; Etherrock *er = ifc->arg; @@ -529,8 +528,7 @@ recvarp(Ipifc *ifc) break; /* check for machine using my ip address */ - v4tov6(ip, e->spa); - if(iplocalonifc(ifc, ip) != nil || ipproxyifc(er->f, ifc, ip)){ + if(arpforme(er->f, V4, e->spa, e->tpa, ifc)){ if(memcmp(e->sha, ifc->mac, sizeof(e->sha)) != 0){ print("arprep: 0x%E/0x%E also has ip addr %V\n", e->s, e->sha, e->spa); @@ -552,8 +550,7 @@ recvarp(Ipifc *ifc) break; /* check for machine using my ip or ether address */ - v4tov6(ip, e->spa); - if(iplocalonifc(ifc, ip) != nil || ipproxyifc(er->f, ifc, ip)){ + if(arpforme(er->f, V4, e->spa, e->tpa, ifc)){ if(memcmp(e->sha, ifc->mac, sizeof(e->sha)) != 0){ if(memcmp(eprinted, e->spa, sizeof(e->spa)) != 0){ /* print only once */ @@ -576,8 +573,7 @@ recvarp(Ipifc *ifc) * enter senders address into arp table and reply, otherwise just * refresh the senders address. */ - v4tov6(ip, e->tpa); - forme = iplocalonifc(ifc, ip) != nil || ipproxyifc(er->f, ifc, ip); + forme = arpforme(er->f, V4, e->tpa, e->spa, ifc); if(arpenter(er->f, V4, e->spa, e->sha, sizeof(e->sha), e->tpa, ifc, !forme) < 0 || !forme) break; |