vikarti.anatra/safing-portmaster
1
0
Fork 0
mirror of https://github.com/safing/portmaster synced 2025-09-01 18:19:12 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Return cached entries if device is offline

Browse source
This commit is contained in:
Daniel 2021-01-25 17:09:27 +01:00
parent cad957bae0
commit 0e93204caf
3 changed files with 11 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
nameserver/nameserver.go
View file

@ -73,13 +73,6 @@ func handleRequest(ctx context.Context, w dns.ResponseWriter, request *dns.Msg)
return nil
}
// Return with server failure if offline.
if netenv.GetOnlineStatus() == netenv.StatusOffline &&
!netenv.IsConnectivityDomain(q.FQDN) {
tracer.Debugf("nameserver: not resolving %s, device is offline", q.FQDN)
return reply(nsutil.ServerFailure("resolving disabled, device is offline"))
}
// Check the Query Class.
if originalQuestion.Qclass != dns.ClassINET {
// we only serve IN records, return nxdomain
@ -186,6 +179,14 @@ func handleRequest(ctx context.Context, w dns.ResponseWriter, request *dns.Msg)
case errors.Is(err, resolver.ErrLocalhost):
tracer.Tracef("nameserver: returning localhost records")
return reply(nsutil.Localhost())
case errors.Is(err, resolver.ErrOffline):
if rrCache == nil {
log.Tracer(ctx).Debugf("nameserver: not resolving %s, device is offline", q.ID())
return reply(nsutil.ServerFailure(err.Error()))
}
// If an rrCache was returned, it's usable a backup.
rrCache.IsBackup = true
log.Tracer(ctx).Debugf("nameserver: device is offline, using backup cache for %s", q.ID())
default:
tracer.Warningf("nameserver: failed to resolve %s: %s", q.ID(), err)
return reply(nsutil.ServerFailure("internal error: " + err.Error()))

6
resolver/resolve.go
View file

@ -317,9 +317,8 @@ func resolveAndCache(ctx context.Context, q *Query, oldCache *RRCache) (rrCache
// check if we are online
if netenv.GetOnlineStatus() == netenv.StatusOffline {
if !netenv.IsConnectivityDomain(q.FQDN) {
log.Tracer(ctx).Debugf("resolver: not resolving %s, device is offline", q.FQDN)
// we are offline and this is not an online check query
return nil, ErrOffline
return oldCache, ErrOffline
}
log.Tracer(ctx).Debugf("resolver: permitting online status test domain %s to resolve even though offline", q.FQDN)
}
@ -356,9 +355,8 @@ resolveLoop:
return nil, err
case netenv.GetOnlineStatus() == netenv.StatusOffline &&
!netenv.IsConnectivityDomain(q.FQDN):
log.Tracer(ctx).Debugf("resolver: not resolving %s, device is offline", q.FQDN)
// we are offline and this is not an online check query
return nil, ErrOffline
return oldCache, ErrOffline
case errors.Is(err, ErrContinue):
continue
case errors.Is(err, ErrTimeout):

2
resolver/rrcache.go
View file

@ -324,7 +324,7 @@ func (rrCache *RRCache) GetExtraRRs(ctx context.Context, query *dns.Msg) (extra
extra = addExtra(ctx, extra, "async request to refresh the cache has been started")
}
if rrCache.IsBackup {
extra = addExtra(ctx, extra, "this record is served because a fresh request failed")
extra = addExtra(ctx, extra, "this record is served because a fresh request was unsuccessful")
}
// Add information about filtered entries.