diff options
| author | Julian Elischer <jrelis@google.com> | 2020-09-23 02:26:50 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-09-23 02:28:43 -0700 |
| commit | 99decaadd6da0df2d8ec70ddea9d754c9d71a584 (patch) | |
| tree | cd6cb0b770ec39b32899c993903dfb21c7e50824 /pkg/tcpip/header/ipv4.go | |
| parent | b54dbdfdc6b6cbdb6f45cd2abd9efb1f2f821a20 (diff) | |
Extract ICMP error sender from UDP
Store transport protocol number on packet buffers for use in ICMP error
generation.
Updates #2211.
PiperOrigin-RevId: 333252762
Diffstat (limited to 'pkg/tcpip/header/ipv4.go')
| -rw-r--r-- | pkg/tcpip/header/ipv4.go | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go index e8816c3f4..b07d9991d 100644 --- a/pkg/tcpip/header/ipv4.go +++ b/pkg/tcpip/header/ipv4.go @@ -80,7 +80,8 @@ type IPv4Fields struct { type IPv4 []byte const ( - // IPv4MinimumSize is the minimum size of a valid IPv4 packet. + // IPv4MinimumSize is the minimum size of a valid IPv4 packet; + // i.e. a packet header with no options. IPv4MinimumSize = 20 // IPv4MaximumHeaderSize is the maximum size of an IPv4 header. Given @@ -327,7 +328,7 @@ func IsV4MulticastAddress(addr tcpip.Address) bool { } // IsV4LoopbackAddress determines if the provided address is an IPv4 loopback -// address (belongs to 127.0.0.1/8 subnet). +// address (belongs to 127.0.0.0/8 subnet). See RFC 1122 section 3.2.1.3. func IsV4LoopbackAddress(addr tcpip.Address) bool { if len(addr) != IPv4AddressSize { return false |