ares_set_local_dev(3) Library Functions Manual ares_set_local_dev(3)
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
23 September 2024 ares_set_local_dev(3)
c-ares 1.34.1 - Generated Fri Oct 11 05:29:43 CDT 2024