NAME¶

knet_link_get_status - Get the status (and statistics) for a link.

SYNOPSIS¶

#include <libknet.h>

int knet_link_get_status(


    knet_handle_t              knet_h,


    knet_node_id_t             host_id,


    uint8_t                    link_id,


    struct knet_link_status   *status,


    size_t                     struct_size
);

DESCRIPTION¶

knet_link_get_status

knet_h - pointer to knet_handle_t

host_id - see knet_host_add(3)

link_id - see knet_link_set_config(3)

status - pointer to knet_link_status struct

struct_size - max size of knet_link_status - allows library to add fields without ABI change. Returned structure will be truncated to this length and .size member indicates the full size.

STRUCTURES¶

Status of a knet link as returned from knet_link_get_status() 

struct knet_link_status {


    /*


     * Size of the structure for ABI checking, set this to


     * sizeof(knet_link_status) before calling knet_link_get_status()


     */


    size_t              size;



    char                src_ipaddr[KNET_MAX_HOST_LEN];  /* Local IP address as a string */



    char                src_port[KNET_MAX_PORT_LEN];    /* Local IP port as a string */



    char                dst_ipaddr[KNET_MAX_HOST_LEN];  /* Remote IP address as a string */



    char                dst_port[KNET_MAX_PORT_LEN];    /* Remote IP port as a string */



    uint8_t             enabled;                        /* Link is configured and admin enabled for traffic */



    uint8_t             connected;                      /* Link is connected for data (local view) */



    uint8_t             dynconnected;                   /* Link has been activated by remote dynip */



    unsigned long long  latency;                        /* average latency computed by fix/exp */



    struct timespec     pong_last;                      /* Timestamp of the past pong received */



    unsigned int        mtu;                            /* Currently detected MTU on this link */

    /*


     * Contains the size of the IP protocol, knet headers and crypto headers


     * (if configured). This value is filled in ONLY after the first PMTUd run on


     * that given link, and can change if link configuration or crypto configuration


     * changes at runtime. WARNING: in general mtu + proto_overhead might or might not


     * match the output of ifconfig mtu due to crypto requirements to pad packets to


     * some specific boundaries.


     */


    unsigned int        proto_overhead;



    struct              stats;                          /* Link statistics */
};

RETURN VALUE¶

knet_link_get_status 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_enable_pmtud_notify(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_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) 2010-2023 Red Hat, Inc. All rights reserved.