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/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
* Sun elects to license this software under the BSD license.
* See README for more details.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libdlpi.h>
#include <sys/ethernet.h>
#include <netinet/in.h>
#include "wpa_impl.h"
#include "eloop.h"
#include "l2_packet.h"
static int
link_init(struct l2_packet_data *l2)
{
int retval;
uint8_t paddr[DLPI_PHYSADDR_MAX];
size_t paddrlen = sizeof (paddr);
retval = dlpi_bind(l2->dh, DLPI_ANY_SAP, NULL);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "cannot bind on %s: %s",
l2->ifname, dlpi_strerror(retval));
return (-1);
}
retval = dlpi_promiscon(l2->dh, DL_PROMISC_SAP);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "cannot enable promiscous"
" mode (SAP) on %s: %s",
l2->ifname, dlpi_strerror(retval));
return (-1);
}
retval = dlpi_get_physaddr(l2->dh, DL_CURR_PHYS_ADDR, paddr, &paddrlen);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "cannot get physical address for %s: %s",
l2->ifname, dlpi_strerror(retval));
return (-1);
}
if (paddrlen != sizeof (l2->own_addr)) {
wpa_printf(MSG_ERROR, "physical address for %s is not %d bytes",
l2->ifname, sizeof (l2->own_addr));
return (-1);
}
(void) memcpy(l2->own_addr, paddr, sizeof (l2->own_addr));
return (0);
}
/*
* layer2 packet handling.
*/
int
l2_packet_get_own_addr(struct l2_packet_data *l2, uint8_t *addr)
{
(void) memcpy(addr, l2->own_addr, sizeof (l2->own_addr));
return (0);
}
int
l2_packet_send(struct l2_packet_data *l2, uint8_t *buf, size_t buflen)
{
int retval;
retval = dlpi_send(l2->dh, NULL, 0, buf, buflen, NULL);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "l2_packet_send: cannot send "
"message on %s: %s", l2->ifname, dlpi_strerror(retval));
return (-1);
}
return (0);
}
/* ARGSUSED */
static void
l2_packet_receive(int fd, void *eloop_ctx, void *sock_ctx)
{
struct l2_packet_data *l2 = eloop_ctx;
uint64_t buf[IEEE80211_MTU_MAX / sizeof (uint64_t)];
size_t buflen = sizeof (buf);
struct l2_ethhdr *ethhdr;
int retval;
retval = dlpi_recv(l2->dh, NULL, NULL, buf, &buflen, 0, NULL);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "l2_packet_receive: cannot receive "
"message on %s: %s", l2->ifname, dlpi_strerror(retval));
return;
}
ethhdr = (struct l2_ethhdr *)buf;
if (buflen < sizeof (*ethhdr) ||
(ntohs(ethhdr->h_proto) != ETHERTYPE_EAPOL &&
ntohs(ethhdr->h_proto) != ETHERTYPE_RSN_PREAUTH))
return;
l2->rx_callback(l2->rx_callback_ctx, ethhdr->h_source,
(unsigned char *)(ethhdr + 1), buflen - sizeof (*ethhdr));
}
/* ARGSUSED */
struct l2_packet_data *
l2_packet_init(const char *ifname, unsigned short protocol,
void (*rx_callback)(void *, unsigned char *, unsigned char *, size_t),
void *rx_callback_ctx)
{
int retval;
struct l2_packet_data *l2;
l2 = calloc(1, sizeof (struct l2_packet_data));
if (l2 == NULL)
return (NULL);
(void) strlcpy(l2->ifname, ifname, sizeof (l2->ifname));
l2->rx_callback = rx_callback;
l2->rx_callback_ctx = rx_callback_ctx;
retval = dlpi_open(l2->ifname, &l2->dh, DLPI_RAW);
if (retval != DLPI_SUCCESS) {
wpa_printf(MSG_ERROR, "unable to open DLPI link %s: %s",
l2->ifname, dlpi_strerror(retval));
free(l2);
return (NULL);
}
/* NOTE: link_init() sets l2->own_addr */
if (link_init(l2) < 0) {
dlpi_close(l2->dh);
free(l2);
return (NULL);
}
(void) eloop_register_read_sock(dlpi_fd(l2->dh), l2_packet_receive, l2,
NULL);
return (l2);
}
void
l2_packet_deinit(struct l2_packet_data *l2)
{
if (l2 == NULL)
return;
eloop_unregister_read_sock(dlpi_fd(l2->dh));
dlpi_close(l2->dh);
free(l2);
}
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