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_handle_crypto_use_config(3),
       knet_host_get_id_by_host_name(3), knet_host_get_status(3), knet_link_add_acl(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_link_rm_acl(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_crypto_rx_clear_traffic(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_handle_enable_access_lists(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_pmtud_set(3),
       knet_handle_clear_stats(3), knet_link_set_config(3), knet_handle_crypto_set_config(3),
       knet_handle_crypto(3), knet_get_crypto_list(3),
       knet_handle_set_transport_reconnect_interval(3), knet_link_clear_acl(3),
       knet_link_set_ping_timers(3), knet_link_insert_acl(3)

COPYRIGHT

       Copyright (C) 2010-2022 Red Hat, Inc. All rights reserved.