diff options
Diffstat (limited to 'pkg/tcpip/header')
| -rw-r--r-- | pkg/tcpip/header/ipv4.go | 7 | ||||
| -rw-r--r-- | pkg/tcpip/header/ipv6.go | 6 |
2 files changed, 11 insertions, 2 deletions
diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go index 4c6e4be64..ee307d163 100644 --- a/pkg/tcpip/header/ipv4.go +++ b/pkg/tcpip/header/ipv4.go @@ -148,6 +148,13 @@ const ( // packet that every IPv4 capable host must be able to // process/reassemble. IPv4MinimumProcessableDatagramSize = 576 + + // IPv4MinimumMTU is the minimum MTU required by IPv4, per RFC 791, + // section 3.2: + // Every internet module must be able to forward a datagram of 68 octets + // without further fragmentation. This is because an internet header may be + // up to 60 octets, and the minimum fragment is 8 octets. + IPv4MinimumMTU = 68 ) // Flags that may be set in an IPv4 packet. diff --git a/pkg/tcpip/header/ipv6.go b/pkg/tcpip/header/ipv6.go index c5d8a3456..09cb153b1 100644 --- a/pkg/tcpip/header/ipv6.go +++ b/pkg/tcpip/header/ipv6.go @@ -101,8 +101,10 @@ const ( // The address is ff02::2. IPv6AllRoutersMulticastAddress tcpip.Address = "\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02" - // IPv6MinimumMTU is the minimum MTU required by IPv6, per RFC 2460, - // section 5. + // IPv6MinimumMTU is the minimum MTU required by IPv6, per RFC 8200, + // section 5: + // IPv6 requires that every link in the Internet have an MTU of 1280 octets + // or greater. This is known as the IPv6 minimum link MTU. IPv6MinimumMTU = 1280 // IPv6Loopback is the IPv6 Loopback address. |