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#pragma once
/*
* IPv4 Address Conflict Detection
*
* This is the public header of the n-acd library, implementing IPv4 Address
* Conflict Detection as described in RFC-5227. This header defines the public
* API and all entry points of n-acd.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <netinet/in.h>
#include <stdbool.h>
enum {
_N_ACD_E_SUCCESS,
N_ACD_E_DONE,
N_ACD_E_STOPPED,
N_ACD_E_PREEMPTED,
N_ACD_E_INVALID_ARGUMENT,
N_ACD_E_BUSY,
};
typedef struct NAcd NAcd;
typedef struct NAcdConfig {
int ifindex;
unsigned int transport;
const uint8_t *mac;
size_t n_mac;
struct in_addr ip;
uint64_t timeout_msec;
} NAcdConfig;
typedef struct NAcdEvent {
unsigned int event;
union {
struct {
} ready, down;
struct {
uint16_t operation;
uint8_t *sender;
size_t n_sender;
struct in_addr target;
} used, defended, conflict;
};
} NAcdEvent;
enum {
N_ACD_TRANSPORT_ETHERNET,
_N_ACD_TRANSPORT_N,
};
enum {
N_ACD_EVENT_READY,
N_ACD_EVENT_USED,
N_ACD_EVENT_DEFENDED,
N_ACD_EVENT_CONFLICT,
N_ACD_EVENT_DOWN,
_N_ACD_EVENT_N,
};
enum {
N_ACD_DEFEND_NEVER,
N_ACD_DEFEND_ONCE,
N_ACD_DEFEND_ALWAYS,
_N_ACD_DEFEND_N,
};
int n_acd_new(NAcd **acdp);
NAcd *n_acd_free(NAcd *acd);
void n_acd_get_fd(NAcd *acd, int *fdp);
int n_acd_dispatch(NAcd *acd);
int n_acd_pop_event(NAcd *acd, NAcdEvent **eventp);
int n_acd_announce(NAcd *acd, unsigned int defend);
int n_acd_start(NAcd *acd, NAcdConfig *config);
void n_acd_stop(NAcd *acd);
static inline void n_acd_freep(NAcd **acd) {
if (*acd)
n_acd_free(*acd);
}
#ifdef __cplusplus
}
#endif
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