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ARES_SET_LOCAL_DEV
Section: C Library Functions (3)Updated: 23 September 2024
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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 mult-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 -ares 1.7.4