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[Qemu-devel] [PATCH 1/8] sockets: add ability to disable DNS resolution
From: |
Daniel P. Berrange |
Subject: |
[Qemu-devel] [PATCH 1/8] sockets: add ability to disable DNS resolution for InetSocketAddress |
Date: |
Thu, 5 Jan 2017 16:03:14 +0000 |
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.
Signed-off-by: Daniel P. Berrange <address@hidden>
---
qapi-schema.json | 5 +++++
util/qemu-sockets.c | 3 +++
2 files changed, 8 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index a0d3b5d..d605c1e 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3070,6 +3070,10 @@
#
# @port: port part of the address, or lowest port if @to is present
#
+# @numeric: #optional true if the host/port are guaranteed to be numeric,
+# false if name resolution should be attempted. Defaults to false.
+# Since 2.8
+#
# @to: highest port to try
#
# @ipv4: whether to accept IPv4 addresses, default try both IPv4 and IPv6
@@ -3084,6 +3088,7 @@
'data': {
'host': 'str',
'port': 'str',
+ 'numeric': 'bool',
'*to': 'uint16',
'*ipv4': 'bool',
'*ipv6': 'bool' } }
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index fe1d07a..6f1c10a 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -141,6 +141,9 @@ static int inet_listen_saddr(InetSocketAddress *saddr,
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_PASSIVE;
+ if (saddr->numeric) {
+ ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
+ }
ai.ai_family = inet_ai_family_from_address(saddr, &err);
ai.ai_socktype = SOCK_STREAM;
--
2.9.3
- [Qemu-devel] [PATCH 0/8] io: enable DNS resolving separately of socket create, Daniel P. Berrange, 2017/01/05
- [Qemu-devel] [PATCH 2/8] io: stop incrementing reference in qio_task_get_source, Daniel P. Berrange, 2017/01/05
- [Qemu-devel] [PATCH 3/8] io: fix typo in docs for QIOTask, Daniel P. Berrange, 2017/01/05
- [Qemu-devel] [PATCH 1/8] sockets: add ability to disable DNS resolution for InetSocketAddress,
Daniel P. Berrange <=
- [Qemu-devel] [PATCH 4/8] io: add ability to associate an opaque "result" with with a task, Daniel P. Berrange, 2017/01/05
- [Qemu-devel] [PATCH 5/8] io: add ability to associate an error with a task, Daniel P. Berrange, 2017/01/05
- [Qemu-devel] [PATCH 6/8] io: change the QIOTask callback signature, Daniel P. Berrange, 2017/01/05