diff options
Diffstat (limited to 'pkg/tcpip/iptables/iptables.go')
| -rw-r--r-- | pkg/tcpip/iptables/iptables.go | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/pkg/tcpip/iptables/iptables.go b/pkg/tcpip/iptables/iptables.go index 605a71679..4bfb3149e 100644 --- a/pkg/tcpip/iptables/iptables.go +++ b/pkg/tcpip/iptables/iptables.go @@ -1,4 +1,4 @@ -// Copyright 2019 The gVisor authors. +// Copyright 2019 The gVisor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. @@ -20,6 +20,7 @@ import ( "fmt" "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/header" ) // Table names. @@ -184,8 +185,16 @@ func (it *IPTables) checkTable(hook Hook, pkt tcpip.PacketBuffer, tablename stri panic(fmt.Sprintf("Traversed past the entire list of iptables rules in table %q.", tablename)) } +// Precondition: pk.NetworkHeader is set. func (it *IPTables) checkRule(hook Hook, pkt tcpip.PacketBuffer, table Table, ruleIdx int) Verdict { rule := table.Rules[ruleIdx] + + // First check whether the packet matches the IP header filter. + // TODO(gvisor.dev/issue/170): Support other fields of the filter. + if rule.Filter.Protocol != 0 && rule.Filter.Protocol != header.IPv4(pkt.NetworkHeader).TransportProtocol() { + return Continue + } + // Go through each rule matcher. If they all match, run // the rule target. for _, matcher := range rule.Matchers { |