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 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, and root privileges are required for the option to work. If SO_BINDTODEVICE is not supported or the setsocktop call fails (probably because of permissions), the error is silently ignored. SEE ALSO ares_set_local_ip4(3) ares_set_local_ip6(3) NOTES This function was added in c-ares 1.7.4 AUTHOR Ben Greear 30 June 2010 ARES_SET_LOCAL_DEV(3)