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-rw-r--r--pkg/tcpip/stack/nic.go7
1 files changed, 6 insertions, 1 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go
index 25188b4fb..440970a21 100644
--- a/pkg/tcpip/stack/nic.go
+++ b/pkg/tcpip/stack/nic.go
@@ -452,7 +452,7 @@ type ipv6AddrCandidate struct {
// primaryIPv6Endpoint returns an IPv6 endpoint following Source Address
// Selection (RFC 6724 section 5).
//
-// Note, only rules 1-3 are followed.
+// Note, only rules 1-3 and 7 are followed.
//
// remoteAddr must be a valid IPv6 address.
func (n *NIC) primaryIPv6Endpoint(remoteAddr tcpip.Address) *referencedNetworkEndpoint {
@@ -523,6 +523,11 @@ func (n *NIC) primaryIPv6Endpoint(remoteAddr tcpip.Address) *referencedNetworkEn
return sbDep
}
+ // Prefer temporary addresses as per RFC 6724 section 5 rule 7.
+ if saTemp, sbTemp := sa.ref.configType == slaacTemp, sb.ref.configType == slaacTemp; saTemp != sbTemp {
+ return saTemp
+ }
+
// sa and sb are equal, return the endpoint that is closest to the front of
// the primary endpoint list.
return i < j