diff options
| author | Russ Cox <rsc@golang.org> | 2011-09-07 15:50:07 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2011-09-07 15:50:07 -0400 |
| commit | ef01ebf4035063442d93ab4aadd0b56dc8ef05b8 (patch) | |
| tree | 0f9af63b9eb1a7a9705e8e99139622efbf9c4c95 | |
| parent | aed2c06dcbc21a305fb96418a97fcd935e27272d (diff) | |
| download | go-ef01ebf4035063442d93ab4aadd0b56dc8ef05b8.tar.gz go-ef01ebf4035063442d93ab4aadd0b56dc8ef05b8.zip | |
net: sync CIDRMask code, doc
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4961069
| -rw-r--r-- | src/pkg/net/ip.go | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/pkg/net/ip.go b/src/pkg/net/ip.go index 0ad27faebb..61dc3be909 100644 --- a/src/pkg/net/ip.go +++ b/src/pkg/net/ip.go @@ -65,8 +65,9 @@ func IPv4Mask(a, b, c, d byte) IPMask { return p } -// CIDRMask returns an IPMask of size bits with the first n bits -// set to to 1. nil is returned if the mask is impossible. +// CIDRMask returns an IPMask consisting of `ones' 1 bits +// followed by 0s up to a total length of `bits' bits. +// For a mask of this form, CIDRMask is the inverse of IPMask.Size. func CIDRMask(ones, bits int) IPMask { if bits != 8*IPv4len && bits != 8*IPv6len { return nil |