l2_packet_none.c revision 61593f02176862f4880ddefcb1f54cb5f5d9f043 
1/*
2 * WPA Supplicant - Layer2 packet handling example with dummy functions
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 *
8 * This file can be used as a starting point for layer2 packet implementation.
9 */
10
11#include "includes.h"
12
13#include "common.h"
14#include "eloop.h"
15#include "l2_packet.h"
16
17
18struct l2_packet_data {
19	char ifname[17];
20	u8 own_addr[ETH_ALEN];
21	void (*rx_callback)(void *ctx, const u8 *src_addr,
22			    const u8 *buf, size_t len);
23	void *rx_callback_ctx;
24	int l2_hdr; /* whether to include layer 2 (Ethernet) header data
25		     * buffers */
26	int fd;
27};
28
29
30int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr)
31{
32	os_memcpy(addr, l2->own_addr, ETH_ALEN);
33	return 0;
34}
35
36
37int l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto,
38		   const u8 *buf, size_t len)
39{
40	if (l2 == NULL)
41		return -1;
42
43	/*
44	 * TODO: Send frame (may need different implementation depending on
45	 * whether l2->l2_hdr is set).
46	 */
47
48	return 0;
49}
50
51
52static void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx)
53{
54	struct l2_packet_data *l2 = eloop_ctx;
55	u8 buf[2300];
56	int res;
57
58	/* TODO: receive frame (e.g., recv() using sock */
59	buf[0] = 0;
60	res = 0;
61
62	l2->rx_callback(l2->rx_callback_ctx, NULL /* TODO: src addr */,
63			buf, res);
64}
65
66
67struct l2_packet_data * l2_packet_init(
68	const char *ifname, const u8 *own_addr, unsigned short protocol,
69	void (*rx_callback)(void *ctx, const u8 *src_addr,
70			    const u8 *buf, size_t len),
71	void *rx_callback_ctx, int l2_hdr)
72{
73	struct l2_packet_data *l2;
74
75	l2 = os_zalloc(sizeof(struct l2_packet_data));
76	if (l2 == NULL)
77		return NULL;
78	os_strlcpy(l2->ifname, ifname, sizeof(l2->ifname));
79	l2->rx_callback = rx_callback;
80	l2->rx_callback_ctx = rx_callback_ctx;
81	l2->l2_hdr = l2_hdr;
82
83	/*
84	 * TODO: open connection for receiving frames
85	 */
86	l2->fd = -1;
87	if (l2->fd >= 0)
88		eloop_register_read_sock(l2->fd, l2_packet_receive, l2, NULL);
89
90	return l2;
91}
92
93
94void l2_packet_deinit(struct l2_packet_data *l2)
95{
96	if (l2 == NULL)
97		return;
98
99	if (l2->fd >= 0) {
100		eloop_unregister_read_sock(l2->fd);
101		/* TODO: close connection */
102	}
103
104	os_free(l2);
105}
106
107
108int l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len)
109{
110	/* TODO: get interface IP address */
111	return -1;
112}
113
114
115void l2_packet_notify_auth_start(struct l2_packet_data *l2)
116{
117	/* This function can be left empty */
118}
119