x/net/ipv4: don't enable advanced features on OS X 10.7 and below
Looks like OS X 10.8 is the safe harbor.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/167630043
diff --git a/ipv4/sys_darwin.go b/ipv4/sys_darwin.go
index 9f0e809..c4c962b 100644
--- a/ipv4/sys_darwin.go
+++ b/ipv4/sys_darwin.go
@@ -47,9 +47,11 @@
continue
}
}
- // The IP_PKTINFO was introduced in OS X 10.7 (Darwin
- // 11.0.0). See http://support.apple.com/kb/HT1633.
- if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '1' {
+ // The IP_PKTINFO and protocol-independent multicast API were
+ // introduced in OS X 10.7 (Darwin 11.0.0). But it looks like
+ // those features require OS X 10.8 (Darwin 12.0.0) and above.
+ // See http://support.apple.com/kb/HT1633.
+ if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '2' {
ctlOpts[ctlPacketInfo].name = sysIP_PKTINFO
ctlOpts[ctlPacketInfo].length = sysSizeofInetPktinfo
ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
