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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
#pragma once
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/*
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* IPv4 Address Conflict Detection
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*
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* This is the public header of the n-acd library, implementing IPv4 Address
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* Conflict Detection as described in RFC-5227. This header defines the public
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* API and all entry points of n-acd.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <netinet/in.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdlib.h>
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typedef struct NAcd NAcd;
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typedef struct NAcdConfig NAcdConfig;
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typedef struct NAcdEvent NAcdEvent;
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typedef struct NAcdProbe NAcdProbe;
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typedef struct NAcdProbeConfig NAcdProbeConfig;
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#define N_ACD_TIMEOUT_RFC5227 (UINT64_C(9000))
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enum {
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_N_ACD_E_SUCCESS,
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N_ACD_E_PREEMPTED,
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N_ACD_E_INVALID_ARGUMENT,
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_N_ACD_E_N,
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};
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enum {
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N_ACD_TRANSPORT_ETHERNET,
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_N_ACD_TRANSPORT_N,
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};
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enum {
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N_ACD_EVENT_READY,
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N_ACD_EVENT_USED,
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N_ACD_EVENT_DEFENDED,
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N_ACD_EVENT_CONFLICT,
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N_ACD_EVENT_DOWN,
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_N_ACD_EVENT_N,
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};
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enum {
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N_ACD_DEFEND_NEVER,
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N_ACD_DEFEND_ONCE,
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N_ACD_DEFEND_ALWAYS,
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_N_ACD_DEFEND_N,
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};
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struct NAcdEvent {
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unsigned int event;
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union {
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struct {
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NAcdProbe *probe;
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} ready;
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struct {
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} down;
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struct {
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NAcdProbe *probe;
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uint8_t *sender;
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size_t n_sender;
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} used, defended, conflict;
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};
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};
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/* configs */
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int n_acd_config_new(NAcdConfig **configp);
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NAcdConfig *n_acd_config_free(NAcdConfig *config);
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void n_acd_config_set_ifindex(NAcdConfig *config, int ifindex);
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void n_acd_config_set_transport(NAcdConfig *config, unsigned int transport);
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void n_acd_config_set_mac(NAcdConfig *config, const uint8_t *mac, size_t n_mac);
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int n_acd_probe_config_new(NAcdProbeConfig **configp);
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NAcdProbeConfig *n_acd_probe_config_free(NAcdProbeConfig *config);
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void n_acd_probe_config_set_ip(NAcdProbeConfig *config, struct in_addr ip);
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void n_acd_probe_config_set_timeout(NAcdProbeConfig *config, uint64_t msecs);
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/* contexts */
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int n_acd_new(NAcd **acdp, NAcdConfig *config);
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NAcd *n_acd_ref(NAcd *acd);
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NAcd *n_acd_unref(NAcd *acd);
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void n_acd_get_fd(NAcd *acd, int *fdp);
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int n_acd_dispatch(NAcd *acd);
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int n_acd_pop_event(NAcd *acd, NAcdEvent **eventp);
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int n_acd_probe(NAcd *acd, NAcdProbe **probep, NAcdProbeConfig *config);
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/* probes */
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NAcdProbe *n_acd_probe_free(NAcdProbe *probe);
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void n_acd_probe_set_userdata(NAcdProbe *probe, void *userdata);
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void n_acd_probe_get_userdata(NAcdProbe *probe, void **userdatap);
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int n_acd_probe_announce(NAcdProbe *probe, unsigned int defend);
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/* inline helpers */
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static inline void n_acd_config_freep(NAcdConfig **config) {
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if (*config)
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n_acd_config_free(*config);
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}
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static inline void n_acd_config_freev(NAcdConfig *config) {
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n_acd_config_free(config);
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}
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static inline void n_acd_probe_config_freep(NAcdProbeConfig **config) {
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if (*config)
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n_acd_probe_config_free(*config);
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}
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static inline void n_acd_probe_config_freev(NAcdProbeConfig *config) {
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n_acd_probe_config_free(config);
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}
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static inline void n_acd_unrefp(NAcd **acd) {
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if (*acd)
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n_acd_unref(*acd);
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}
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static inline void n_acd_unrefv(NAcd *acd) {
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n_acd_unref(acd);
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}
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static inline void n_acd_probe_freep(NAcdProbe **probe) {
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if (*probe)
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n_acd_probe_free(*probe);
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}
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static inline void n_acd_probe_freev(NAcdProbe *probe) {
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n_acd_probe_free(probe);
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}
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#ifdef __cplusplus
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}
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#endif
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