.\"  Automatically generated man page, do not edit
.TH knet_handle_enable_pmtud_notify 3 2020-04-23 "kronosnet" "Kronosnet Programmer's Manual"
.SH NAME
knet_handle_enable_pmtud_notify \- install a callback to receive PMTUd changes
.SH SYNOPSIS
.nf
.B #include <libknet.h>
.sp
\fBint knet_handle_enable_pmtud_notify\fP(
    \fBknet_handle_t                                       \fP\fIknet_h\fP,
    \fBvoid                                               *\fP\fIpmtud_notify_fn_private_data\fP,
    \fBvoid(*)(void *private_data, unsigned int data_mtu)  \fP\fIpmtud_notify_fn\fP
);
.fi
.SH DESCRIPTION
.PP
knet_handle_enable_pmtud_notify
.PP
knet_h - pointer to knet_handle_t
.PP
pmtud_notify_fn_private_data void pointer to data that can be used to identify the callback.
.PP
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.
.SH RETURN VALUE
.PP
knet_handle_enable_pmtud_notify returns 0 on success -1 on error and errno is set. 
.SH SEE ALSO
.PP
.nh
.ad l
\fIknet_handle_remove_datafd(3), \fIknet_handle_get_stats(3), \fIknet_host_add(3), \fIknet_handle_pmtud_setfreq(3), \fIknet_handle_pmtud_get(3), \fIknet_host_get_id_by_host_name(3), \fIknet_host_get_status(3), \fIknet_link_add_acl(3), \fIknet_link_get_pong_count(3), \fIknet_link_get_priority(3), \fIknet_handle_free(3), \fIknet_handle_enable_sock_notify(3), \fIknet_handle_get_datafd(3), \fIknet_recv(3), \fIknet_link_get_ping_timers(3), \fIknet_log_get_subsystem_id(3), \fIknet_host_remove(3), \fIknet_host_enable_status_change_notify(3), \fIknet_strtoaddr(3), \fIknet_link_rm_acl(3), \fIknet_send(3), \fIknet_handle_get_transport_reconnect_interval(3), \fIknet_link_get_enable(3), \fIknet_link_set_priority(3), \fIknet_log_set_loglevel(3), \fIknet_handle_get_channel(3), \fIknet_link_get_config(3), \fIknet_link_get_link_list(3), \fIknet_get_transport_list(3), \fIknet_get_transport_id_by_name(3), \fIknet_log_get_loglevel_id(3), \fIknet_handle_new_ex(3), \fIknet_host_set_name(3), \fIknet_addrtostr(3), \fIknet_handle_setfwd(3), \fIknet_get_compress_list(3), \fIknet_host_set_policy(3), \fIknet_get_transport_name_by_id(3), \fIknet_handle_enable_filter(3), \fIknet_handle_compress(3), \fIknet_link_get_status(3), \fIknet_handle_add_datafd(3), \fIknet_send_sync(3), \fIknet_log_get_loglevel_name(3), \fIknet_handle_enable_access_lists(3), \fIknet_host_get_host_list(3), \fIknet_host_get_policy(3), \fIknet_link_set_enable(3), \fIknet_link_set_pong_count(3), \fIknet_log_get_subsystem_name(3), \fIknet_host_get_name_by_host_id(3), \fIknet_link_clear_config(3), \fIknet_log_get_loglevel(3), \fIknet_handle_new(3), \fIknet_handle_pmtud_getfreq(3), \fIknet_handle_pmtud_set(3), \fIknet_handle_clear_stats(3), \fIknet_link_set_config(3), \fIknet_handle_crypto(3), \fIknet_get_crypto_list(3), \fIknet_handle_set_transport_reconnect_interval(3), \fIknet_link_clear_acl(3), \fIknet_link_set_ping_timers(3), \fIknet_link_insert_acl(3)
.ad
.hy
.SH "COPYRIGHT"
.PP
Copyright (C) 2010-2020 Red Hat, Inc. All rights reserved.