NAME

       knet_handle_enable_pmtud_notify - install a callback to receive PMTUd changes

SYNOPSIS

       #include <libknet.h>

       int knet_handle_enable_pmtud_notify(
           knet_handle_t                                      knet_h,
           void                                              *pmtud_notify_fn_private_data,
           void(*)(void *private_data, unsigned int data_mtu) pmtud_notify_fn
       );

DESCRIPTION

       knet_handle_enable_pmtud_notify

       knet_h - pointer to knet_handle_t

       pmtud_notify_fn_private_data void pointer to data that can be used to identify the callback.

       pmtud_notify_fn is a callback function that is invoked every time a path MTU size change is detected. The
       function allows libknet to notify the user of data MTU, that's the max value  that  can  be  send  onwire
       without  fragmentation.  The  data  MTU  will  always be lower than real link MTU because it accounts for
       protocol overhead, knet packet header and (if configured) crypto overhead, This function MUST NEVER block
       or add substantial delays.

RETURN VALUE

       knet_handle_enable_pmtud_notify returns 0 on success -1 on error and errno is set.

SEE ALSO

       knet_handle_remove_datafd(3), knet_handle_get_stats(3), knet_host_add(3), knet_handle_pmtud_setfreq(3),
       knet_handle_pmtud_get(3), knet_host_get_id_by_host_name(3), knet_host_get_status(3),
       knet_link_get_pong_count(3), knet_link_get_priority(3), knet_handle_free(3),
       knet_handle_enable_sock_notify(3), knet_handle_get_datafd(3), knet_recv(3), knet_link_get_ping_timers(3),
       knet_log_get_subsystem_id(3), knet_host_remove(3), knet_host_enable_status_change_notify(3),
       knet_strtoaddr(3), knet_send(3), knet_handle_get_transport_reconnect_interval(3),
       knet_link_get_enable(3), knet_link_set_priority(3), knet_log_set_loglevel(3), knet_handle_get_channel(3),
       knet_link_get_config(3), knet_link_get_link_list(3), knet_get_transport_list(3),
       knet_get_transport_id_by_name(3), knet_log_get_loglevel_id(3), knet_handle_new_ex(3),
       knet_host_set_name(3), knet_addrtostr(3), knet_handle_setfwd(3), knet_get_compress_list(3),
       knet_host_set_policy(3), knet_get_transport_name_by_id(3), knet_handle_enable_filter(3),
       knet_handle_compress(3), knet_link_get_status(3), knet_handle_add_datafd(3), knet_send_sync(3),
       knet_log_get_loglevel_name(3), knet_host_get_host_list(3), knet_host_get_policy(3),
       knet_link_set_enable(3), knet_link_set_pong_count(3), knet_log_get_subsystem_name(3),
       knet_host_get_name_by_host_id(3), knet_link_clear_config(3), knet_log_get_loglevel(3),
       knet_handle_new(3), knet_handle_pmtud_getfreq(3), knet_handle_clear_stats(3), knet_link_set_config(3),
       knet_handle_crypto(3), knet_get_crypto_list(3), knet_handle_set_transport_reconnect_interval(3),
       knet_link_set_ping_timers(3)

COPYRIGHT

       Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.