l2_packet.h

/*
 * WPA Supplicant - Layer2 packet interface definition
 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 *
 * This file defines an interface for layer 2 (link layer) packet sending and
 * receiving. l2_packet_linux.c is one implementation for such a layer 2
 * implementation using Linux packet sockets and l2_packet_pcap.c another one
 * using libpcap and libdnet. When porting %wpa_supplicant to other operating
 * systems, a new l2_packet implementation may need to be added.
 */

#ifndef L2_PACKET_H
#define L2_PACKET_H

struct l2_packet_data;

#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */

struct l2_ethhdr {
    u8 h_dest[ETH_ALEN];
    u8 h_source[ETH_ALEN];
    be16 h_proto;
} STRUCT_PACKED;

#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */

enum l2_packet_filter_type {
    L2_PACKET_FILTER_DHCP,
    L2_PACKET_FILTER_NDISC,
};

struct l2_packet_data * l2_packet_init(
    const char *ifname, const u8 *own_addr, unsigned short protocol,
    void (*rx_callback)(void *ctx, const u8 *src_addr,
                const u8 *buf, size_t len),
    void *rx_callback_ctx, int l2_hdr);

struct l2_packet_data * l2_packet_init_bridge(
    const char *br_ifname, const char *ifname, const u8 *own_addr,
    unsigned short protocol,
    void (*rx_callback)(void *ctx, const u8 *src_addr,
                const u8 *buf, size_t len),
    void *rx_callback_ctx, int l2_hdr);

void l2_packet_deinit(struct l2_packet_data *l2);

int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr);

int l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto,
           const u8 *buf, size_t len);

int l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len);


void l2_packet_notify_auth_start(struct l2_packet_data *l2);

int l2_packet_set_packet_filter(struct l2_packet_data *l2,
                enum l2_packet_filter_type type);

#endif /* L2_PACKET_H */