Copyright 2010 by Ben Greear <greearb@candelatech.com>
SPDX-License-Identifier: MIT
ARES_SET_LOCAL_DEV 3 "23 September 2024"
NAME
ares_set_local_dev - Bind to a specific network device when creating sockets.
SYNOPSIS
#include <ares.h> void ares_set_local_dev(ares_channel_t *channel, const char* local_dev_name)
DESCRIPTION
The ares_set_local_dev function causes all future sockets
to be bound to this device with SO_BINDTODEVICE. This forces communications
to go over a certain interface, which can be useful on multi-homed machines.
This option is only supported on Linux, the interface must not be already bound to the
socket or the current effective user must have CAP_NET_RAW capability in the current
network namespace for the option to work. If SO_BINDTODEVICE is not supported or the
setsockopt call fails (probably because of permissions), the error is
silently ignored.
SEE ALSO
ares_set_local_ip4 (3) ares_set_local_ip6 (3) network_namespaces (7) NOTES
This function was added in c-ares 1.7.4