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)