rpc: getaddrinfo: also accept IPv4-mapped IPv6 addresses

If only IPv6 is configured on the host, getaddrinfo with AI_ADDRCONFIG
in hints would return EAI_ADDRFAMILY for nodenames that resolve to IPv4.

Also pass AI_V4MAPPED to accept IPv4-mapped addresses on IPv6-only
systems.

Signed-off-by: Zhimin Feng <fengzhimin1@huawei.com>
[rewrote the commit message - jtomko]
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c
index 360711acb61eb118d08979e764277d487497ac68..6c790cb577003b64da01816a1e99db259146420c 100644 (file)
--- a/src/rpc/virnetsocket.c
+++ b/src/rpc/virnetsocket.c
@@ -575,7 +575,7 @@ int virNetSocketNewConnectTCP(const char *nodename,
 
     memset(&hints, 0, sizeof(hints));
     hints.ai_family = family;
-    hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
+    hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG | AI_V4MAPPED;
     hints.ai_socktype = SOCK_STREAM;
 
     int e = getaddrinfo(nodename, service, &hints, &ai);