124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
|
/*
|
||
|
|
* WPA Supplicant - Layer2 packet handling example with dummy functions
|
||
|
|
* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* Alternatively, this software may be distributed under the terms of BSD
|
||
|
|
* license.
|
||
|
|
*
|
||
|
|
* See README and COPYING for more details.
|
||
|
|
*
|
||
|
|
* This file can be used as a starting point for layer2 packet implementation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "includes.h"
|
||
|
|
|
||
|
|
#include "common.h"
|
||
|
|
#include "eloop.h"
|
||
|
|
#include "l2_packet.h"
|
||
|
|
|
||
|
|
|
||
|
|
struct l2_packet_data {
|
||
|
|
char ifname[17];
|
||
|
|
u8 own_addr[ETH_ALEN];
|
||
|
|
void (*rx_callback)(void *ctx, const u8 *src_addr,
|
||
|
|
const u8 *buf, size_t len);
|
||
|
|
void *rx_callback_ctx;
|
||
|
|
int l2_hdr; /* whether to include layer 2 (Ethernet) header data
|
||
|
|
* buffers */
|
||
|
|
int fd;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr)
|
||
|
|
{
|
||
|
|
os_memcpy(addr, l2->own_addr, ETH_ALEN);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int l2_packet_send(struct l2_packet_data *l2, const u8 *dst_addr, u16 proto,
|
||
|
|
const u8 *buf, size_t len)
|
||
|
|
{
|
||
|
|
if (l2 == NULL)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* TODO: Send frame (may need different implementation depending on
|
||
|
|
* whether l2->l2_hdr is set).
|
||
|
|
*/
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void l2_packet_receive(int sock, void *eloop_ctx, void *sock_ctx)
|
||
|
|
{
|
||
|
|
struct l2_packet_data *l2 = eloop_ctx;
|
||
|
|
u8 buf[2300];
|
||
|
|
int res;
|
||
|
|
|
||
|
|
/* TODO: receive frame (e.g., recv() using sock */
|
||
|
|
buf[0] = 0;
|
||
|
|
res = 0;
|
||
|
|
|
||
|
|
l2->rx_callback(l2->rx_callback_ctx, NULL /* TODO: src addr */,
|
||
|
|
buf, res);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
l2 = os_zalloc(sizeof(struct l2_packet_data));
|
||
|
|
if (l2 == NULL)
|
||
|
|
return NULL;
|
||
|
|
os_strncpy(l2->ifname, ifname, sizeof(l2->ifname));
|
||
|
|
l2->rx_callback = rx_callback;
|
||
|
|
l2->rx_callback_ctx = rx_callback_ctx;
|
||
|
|
l2->l2_hdr = l2_hdr;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* TODO: open connection for receiving frames
|
||
|
|
*/
|
||
|
|
l2->fd = -1;
|
||
|
|
eloop_register_read_sock(l2->fd, l2_packet_receive, l2, NULL);
|
||
|
|
|
||
|
|
return l2;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void l2_packet_deinit(struct l2_packet_data *l2)
|
||
|
|
{
|
||
|
|
if (l2 == NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (l2->fd >= 0) {
|
||
|
|
eloop_unregister_read_sock(l2->fd);
|
||
|
|
/* TODO: close connection */
|
||
|
|
}
|
||
|
|
|
||
|
|
os_free(l2);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int l2_packet_get_ip_addr(struct l2_packet_data *l2, char *buf, size_t len)
|
||
|
|
{
|
||
|
|
/* TODO: get interface IP address */
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void l2_packet_notify_auth_start(struct l2_packet_data *l2)
|
||
|
|
{
|
||
|
|
/* This function can be left empty */
|
||
|
|
}
|