diff options
| author | Arthur Sfez <asfez@google.com> | 2020-10-21 22:10:13 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-10-21 22:12:13 -0700 |
| commit | 58a3c2d44f9596c22ef6b226cb6f2fa61617ba88 (patch) | |
| tree | 9fbba6a1255a0855e03a5d67094da3e62e21fc1e /pkg/tcpip/header/ipv6.go | |
| parent | 4e389c785779114620b47e005d08ca469cc1ed68 (diff) | |
Add underflow check when calculating the MTU
Also enforce the minimum MTU for IPv4 and IPv6, and discard packets if the
minimum is not met.
PiperOrigin-RevId: 338404225
Diffstat (limited to 'pkg/tcpip/header/ipv6.go')
| -rw-r--r-- | pkg/tcpip/header/ipv6.go | 6 |
1 files changed, 4 insertions, 2 deletions
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. |