diff options
Diffstat (limited to 'pkg/abi')
| -rw-r--r-- | pkg/abi/linux/netfilter.go | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/pkg/abi/linux/netfilter.go b/pkg/abi/linux/netfilter.go index 33fcc6c95..effed7976 100644 --- a/pkg/abi/linux/netfilter.go +++ b/pkg/abi/linux/netfilter.go @@ -198,6 +198,11 @@ type XTEntryMatch struct { // SizeOfXTEntryMatch is the size of an XTEntryMatch. const SizeOfXTEntryMatch = 32 +type KernelXTEntryMatch struct { + XTEntryMatch + Data []byte +} + // XTEntryTarget holds a target for a rule. For example, it can specify that // packets matching the rule should DROP, ACCEPT, or use an extension target. // iptables-extension(8) has a list of possible targets. @@ -340,3 +345,43 @@ func goString(cstring []byte) string { } return string(cstring) } + +// XTUDP holds data for matching UDP packets. It corresponds to struct xt_udp +// in include/uapi/linux/netfilter/xt_tcpudp.h. +type XTUDP struct { + // SourcePortStart specifies the inclusive start of the range of source + // ports to which the matcher applies. + SourcePortStart uint16 + + // SourcePortEnd specifies the inclusive end of the range of source ports + // to which the matcher applies. + SourcePortEnd uint16 + + // DestinationPortStart specifies the start of the destination port + // range to which the matcher applies. + DestinationPortStart uint16 + + // DestinationPortEnd specifies the start of the destination port + // range to which the matcher applies. + DestinationPortEnd uint16 + + // InverseFlags flips the meaning of certain fields. See the + // TX_UDP_INV_* flags. + InverseFlags uint8 + + _ uint8 +} + +// SizeOfXTUDP is the size of an XTUDP. +const SizeOfXTUDP = 10 + +// Flags in XTUDP.InverseFlags. Corresponding constants are in +// include/uapi/linux/netfilter/xt_tcpudp.h. +const ( + // Invert the meaning of SourcePortStart/End. + XT_UDP_INV_SRCPT = 0x01 + // Invert the meaning of DestinationPortStart/End. + XT_UDP_INV_DSTPT = 0x02 + // Enable all flags. + XT_UDP_INV_MASK = 0x03 +) |