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net: avoid unnecessary conversion in address selection

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Change-Id: I0d940810b493249bc092cd38bdb434f7fa67cafb
Reviewed-on: https://go-review.googlesource.com/12341
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Mikio Hara 2015-07-17 10:16:45 +09:00
parent cc8f544198
commit 2899be8120
1 changed files with 7 additions and 4 deletions
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11
src/net/addrselect.go
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@ -40,13 +40,16 @@ func sortByRFC6724withSrcs(addrs []IPAddr, srcs []IP) {
// number is irrelevant. // number is irrelevant.
func srcAddrs(addrs []IPAddr) []IP { func srcAddrs(addrs []IPAddr) []IP {
srcs := make([]IP, len(addrs)) srcs := make([]IP, len(addrs))
dst := UDPAddr{Port: 9}
for i := range addrs { for i := range addrs {
conn, err := Dial("udp", JoinHostPort(addrs[i].IP.String(), "1234")) dst.IP = addrs[i].IP
dst.Zone = addrs[i].Zone
c, err := DialUDP("udp", nil, &dst)
if err == nil { if err == nil {
if ua, ok := conn.LocalAddr().(*UDPAddr); ok { if src, ok := c.LocalAddr().(*UDPAddr); ok {
srcs[i] = ua.IP srcs[i] = src.IP
} }
conn.Close() c.Close()
} }
} }
return srcs return srcs