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JackDoan committed 2026-09-30 14:57:19 -05:00
1 parent 027c728702
commit e99e48cca7
7 files changed
+83 -77
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outside.go
+6 -6
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@@ -368,8 +368,8 @@ func parseV6(data []byte, incoming bool, fp *firewall.ParsedPacket) error {
return nil
}
switch proto {
case iputil.IPProtocolICMPv6:
switch {
case proto == iputil.IPProtocolICMPv6:
// An ICMPv6 message is at least type, code and checksum, 4 bytes. Only echo carries more than we read.
if dataLen < offset+4 {
return ErrIPv6PacketTooShort
@@ -385,7 +385,7 @@ func parseV6(data []byte, incoming bool, fp *firewall.ParsedPacket) error {
fp.RemotePort = 0
}
case iputil.IPProtocolTCP, iputil.IPProtocolUDP, iputil.IPProtocolDCCP, iputil.IPProtocolSCTP, iputil.IPProtocolUDPLite:
case iputil.HasPorts(proto):
if dataLen < offset+4 {
return ErrIPv6PacketTooShort
}
@@ -459,12 +459,12 @@ func parseV4(data []byte, incoming bool, fp *firewall.ParsedPacket) error {
return nil
}
switch fp.Protocol {
case iputil.IPProtocolICMP: //note that orientation doesn't matter on ICMP
switch {
case fp.Protocol == iputil.IPProtocolICMP: //note that orientation doesn't matter on ICMP
fp.RemotePort = binary.BigEndian.Uint16(data[ihl+4 : ihl+6]) //identifier
fp.LocalPort = 0 //code would be uint16(data[ihl+1])
case iputil.IPProtocolTCP, iputil.IPProtocolUDP, iputil.IPProtocolDCCP, iputil.IPProtocolSCTP, iputil.IPProtocolUDPLite:
case iputil.HasPorts(fp.Protocol):
if incoming {
fp.RemotePort = binary.BigEndian.Uint16(data[ihl : ihl+2]) //src port
fp.LocalPort = binary.BigEndian.Uint16(data[ihl+2 : ihl+4]) //dst port