2 * WPA Supplicant - Layer2 packet handling example with dummy functions
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
14 * This file can be used as a starting point for layer2 packet implementation.
21 #include "l2_packet.h"
24 struct l2_packet_data {
26 u8 own_addr[ETH_ALEN];
27 void (*rx_callback)(void *ctx, const u8 *src_addr,
28 const u8 *buf, size_t len);
29 void *rx_callback_ctx;
30 int l2_hdr; /* whether to include layer 2 (Ethernet) header data
36 int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr)
38 os_memcpy(addr, l2->own_addr, ETH_ALEN);
43 int l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto,
44 const u8 *buf, size_t len)
50 * TODO: Send frame (may need different implementation depending on
51 * whether l2->l2_hdr is set).
58 static void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx)
60 struct l2_packet_data *l2 = eloop_ctx;
64 /* TODO: receive frame (e.g., recv() using sock */
68 l2->rx_callback(l2->rx_callback_ctx, NULL /* TODO: src addr */,
73 struct l2_packet_data * l2_packet_init(
74 const char *ifname, const u8 *own_addr, unsigned short protocol,
75 void (*rx_callback)(void *ctx, const u8 *src_addr,
76 const u8 *buf, size_t len),
77 void *rx_callback_ctx, int l2_hdr)
79 struct l2_packet_data *l2;
81 l2 = os_zalloc(sizeof(struct l2_packet_data));
84 os_strlcpy(l2->ifname, ifname, sizeof(l2->ifname));
85 l2->rx_callback = rx_callback;
86 l2->rx_callback_ctx = rx_callback_ctx;
90 * TODO: open connection for receiving frames
93 eloop_register_read_sock(l2->fd, l2_packet_receive, l2, NULL);
99 void l2_packet_deinit(struct l2_packet_data *l2)
105 eloop_unregister_read_sock(l2->fd);
106 /* TODO: close connection */
113 int l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len)
115 /* TODO: get interface IP address */
120 void l2_packet_notify_auth_start(struct l2_packet_data *l2)
122 /* This function can be left empty */