gSocketClientConnectToHost: gSocketClientConnectToHost
Usage
gSocketClientConnectToHost(object, host.and.port, default.port, cancellable = NULL, .errwarn = TRUE)
Arguments
host.and.port
the name and optionally port of the host to connect to
default.port
the default port to connect to
.errwarn
Whether to issue a warning on error or fail silently
Details
Attempts to create a TCP connection to the named host.
host.and.port may be in any of a number of recognised formats: an IPv6
address, an IPv4 address, or a domain name (in which case a DNS
lookup is performed). Quoting with [] is supported for all address
types. A port override may be specified in the usual way with a
colon. Ports may be given as decimal numbers or symbolic names (in
which case an /etc/services lookup is performed).
If no port override is given in host.and.port then default.port will be
used as the port number to connect to.
In general, host.and.port is expected to be provided by the user (allowing
them to give the hostname, and a port overide if necessary) and
default.port is expected to be provided by the application.
In the case that an IP address is given, a single connection
attempt is made. In the case that a name is given, multiple
connection attempts may be made, in turn and according to the
number of address records in DNS, until a connection succeeds.
Upon a successful connection, a new GSocketConnection is constructed
and returned. The caller owns this new object and must drop their
reference to it when finished with it.
In the event of any failure (DNS error, service not found, no hosts
connectable) NULL is returned and error (if non-NULL) is set
accordingly.
Since 2.22