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authorDaniel P. Berrange <berrange@redhat.com>2016-07-19 12:58:52 +0100
committerDaniel P. Berrange <berrange@redhat.com>2017-01-23 15:32:17 +0000
commit6979a813f38d221bf68c3928a8d2b810cefc34b5 (patch)
tree18ca9040208ea2903cc62fcb35173cd2a8de1379 /util/qemu-sockets.c
parent598cf1c805271564686f2d732b36f50c3c40dcdd (diff)
sockets: add ability to disable DNS resolution for InetSocketAddress
Add a 'numeric' flag to the InetSocketAddress struct to allow the caller to indicate that DNS should be skipped for the host/port fields. This is useful if the caller knows the address is already numeric and wants to guarantee no (potentially blocking) DNS lookups are attempted. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'util/qemu-sockets.c')
-rw-r--r--util/qemu-sockets.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index fe1d07aaef..b6d99cbf42 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -38,6 +38,10 @@
# define AI_V4MAPPED 0
#endif
+#ifndef AI_NUMERICSERV
+# define AI_NUMERICSERV 0
+#endif
+
static int inet_getport(struct addrinfo *e)
{
@@ -141,6 +145,9 @@ static int inet_listen_saddr(InetSocketAddress *saddr,
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_PASSIVE;
+ if (saddr->has_numeric && saddr->numeric) {
+ ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
+ }
ai.ai_family = inet_ai_family_from_address(saddr, &err);
ai.ai_socktype = SOCK_STREAM;