diff options
Diffstat (limited to 'pkg/tcpip/iptables/iptables.go')
| -rw-r--r-- | pkg/tcpip/iptables/iptables.go | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/pkg/tcpip/iptables/iptables.go b/pkg/tcpip/iptables/iptables.go index 4e1700fdb..3cff879a2 100644 --- a/pkg/tcpip/iptables/iptables.go +++ b/pkg/tcpip/iptables/iptables.go @@ -21,6 +21,7 @@ import ( "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/header" ) const ( @@ -183,12 +184,13 @@ 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 != pkt.Protocol { + if rule.Filter.Protocol != header.IPv4(pkt.NetworkHeader).TransportProtocol() { return Continue } |