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net: filter destination addresses when source address is specified

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This change filters out destination addresses by address family when
source address is specified to avoid running Dial operation with wrong
addressing scopes.

Fixes #11837.

Change-Id: I10b7a1fa325add2cd8ed58f105d527700a10d342
Reviewed-on: https://go-review.googlesource.com/20586
Reviewed-by: Paul Marks <pmarks@google.com>
This commit is contained in:
Mikio Hara 2016-03-15 10:00:12 +09:00
parent 76b724cc63
commit 790053b25e
6 changed files with 176 additions and 48 deletions
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4
src/net/ip.go
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@ -377,6 +377,10 @@ func bytesEqual(x, y []byte) bool {
return true
}
func (ip IP) matchAddrFamily(x IP) bool {
return ip.To4() != nil && x.To4() != nil || ip.To16() != nil && ip.To4() == nil && x.To16() != nil && x.To4() == nil
}
// If mask is a sequence of 1 bits followed by 0 bits,
// return the number of 1 bits.
func simpleMaskLength(mask IPMask) int {