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io: introduce a DNS resolver API

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Currently DNS resolution is done automatically as part
of the creation of a QIOChannelSocket object instance.
This works ok for network clients where you just end
up a single network socket, but for servers, the results
of DNS resolution may require creation of multiple
sockets.

Introducing a DNS resolver API allows DNS resolution
to be separated from the socket object creation. This
will make it practical to create multiple QIOChannelSocket
instances for servers.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-07-19 12:54:47 +01:00
parent 59de517d8d
commit c1b412f1d9
5 changed files with 509 additions and 2 deletions
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2
include/qemu/sockets.h
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@ -32,6 +32,8 @@ int socket_set_fast_reuse(int fd);
*/
typedef void NonBlockingConnectHandler(int fd, Error *err, void *opaque);
int inet_ai_family_from_address(InetSocketAddress *addr,
Error **errp);
InetSocketAddress *inet_parse(const char *str, Error **errp);
int inet_connect(const char *str, Error **errp);
int inet_connect_saddr(InetSocketAddress *saddr, Error **errp,