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/* $OpenBSD: iapp.c,v 1.1 2005/04/13 18:12:23 reyk Exp $ */
/*
* Copyright (c) 2004, 2005 Reyk Floeter <reyk@vantronix.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/if_llc.h>
#include <net/bpf.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "hostapd.h"
void
hostapd_iapp_init(struct hostapd_config *cfg)
{
if ((cfg->c_flags & HOSTAPD_CFG_F_APME) == 0)
return;
/* Get Host AP's BSSID */
hostapd_priv_apme_bssid(cfg);
hostapd_log(HOSTAPD_LOG_VERBOSE,
"%s/%s: attaching to Host AP with BSSID \"%s\"\n",
cfg->c_apme_iface, cfg->c_iapp_iface,
ether_ntoa((struct ether_addr *)cfg->c_apme_bssid));
}
void
hostapd_iapp_term(struct hostapd_config *cfg)
{
if ((cfg->c_flags & HOSTAPD_CFG_F_APME) == 0)
return;
/* XXX not yet used but inspired by the APME TERMINATE action */
hostapd_log(HOSTAPD_LOG_VERBOSE, "%s/%s: detaching from Host AP\n",
cfg->c_apme_iface, cfg->c_iapp_iface);
}
int
hostapd_iapp_add_notify(struct hostapd_config *cfg, struct hostapd_node *node)
{
struct sockaddr_in *addr;
struct {
struct ieee80211_iapp_frame hdr;
struct ieee80211_iapp_add_notify add;
} __packed frame;
/*
* Send an ADD.notify message to other accesspoints to notify
* about a new association on our Host AP.
*/
bzero(&frame, sizeof(frame));
frame.hdr.i_version = IEEE80211_IAPP_VERSION;
frame.hdr.i_command = IEEE80211_IAPP_FRAME_ADD_NOTIFY;
frame.hdr.i_identifier = htons(cfg->c_iapp++);
frame.add.a_length = IEEE80211_ADDR_LEN;
frame.add.a_seqnum = htons(node->ni_rxseq);
bcopy(node->ni_macaddr, frame.add.a_macaddr, IEEE80211_ADDR_LEN);
if (cfg->c_flags & HOSTAPD_CFG_F_BRDCAST)
addr = &cfg->c_iapp_broadcast;
else
addr = &cfg->c_iapp_multicast;
if (sendto(cfg->c_iapp_udp, &frame, sizeof(frame),
0, (struct sockaddr *)addr, sizeof(struct sockaddr_in)) == -1) {
hostapd_log(HOSTAPD_LOG,
"%s/%s: failed to send ADD notification: %s\n",
cfg->c_apme_iface, cfg->c_iapp_iface,
strerror(errno));
return (errno);
}
hostapd_log(HOSTAPD_LOG, "%s/%s: sent ADD notification for %s\n",
cfg->c_apme_iface, cfg->c_iapp_iface,
ether_ntoa((struct ether_addr*)frame.add.a_macaddr));
/* Send a LLC XID frame, see llc.c for details */
return (hostapd_priv_llc_xid(cfg, node));
}
void
hostapd_iapp_input(int fd, short sig, void *arg)
{
struct hostapd_config *cfg = (struct hostapd_config *)arg;
struct sockaddr_in addr;
socklen_t addr_len;
u_int8_t buf[IAPP_MAXSIZE];
struct hostapd_node node;
struct ieee80211_iapp_recv {
struct ieee80211_iapp_frame hdr;
union {
struct ieee80211_iapp_add_notify add;
} u;
} __packed *frame;
int ret = 0;
/* Ignore invalid signals */
if (sig != EV_READ)
return;
/*
* Listen to possible messages from other IAPP
*/
bzero(buf, sizeof(buf));
if (recvfrom(fd, buf, sizeof(buf), 0,
(struct sockaddr*)&addr, &addr_len) < 1)
return;
if (memcmp(&cfg->c_iapp_addr.sin_addr, &addr.sin_addr,
sizeof(addr.sin_addr)) == 0)
return;
frame = (struct ieee80211_iapp_recv*)buf;
/* Validate the IAPP version */
if (frame->hdr.i_version != IEEE80211_IAPP_VERSION ||
addr_len < sizeof(struct sockaddr_in))
return;
cfg->c_stats.cn_rx_iapp++;
/*
* Process the IAPP frame
*/
switch (frame->hdr.i_command) {
case IEEE80211_IAPP_FRAME_ADD_NOTIFY:
/* Don't support non-48bit MAC addresses, yet */
if (frame->u.add.a_length != IEEE80211_ADDR_LEN)
return;
node.ni_rxseq = frame->u.add.a_seqnum;
bcopy(frame->u.add.a_macaddr, node.ni_macaddr,
IEEE80211_ADDR_LEN);
/*
* Try to remove a node from our Host AP and to free
* any allocated resources. Otherwise the received
* ADD.notify message will be ignored.
*/
if (cfg->c_flags & HOSTAPD_CFG_F_APME)
ret = hostapd_priv_apme_delnode(cfg, &node);
else
ret = 0;
hostapd_log(HOSTAPD_LOG, "%s/%s: %s ADD notification "
"for %s at %s (%s)\n",
ret == 0 ? "received" : "ignored",
cfg->c_apme_iface, cfg->c_iapp_iface,
ether_ntoa((struct ether_addr*)node.ni_macaddr),
inet_ntoa(addr.sin_addr));
break;
case IEEE80211_IAPP_FRAME_MOVE_NOTIFY:
case IEEE80211_IAPP_FRAME_MOVE_RESPONSE:
case IEEE80211_IAPP_FRAME_SEND_SECURITY_BLOCK:
case IEEE80211_IAPP_FRAME_ACK_SECURITY_BLOCK:
case IEEE80211_IAPP_FRAME_CACHE_NOTIFY:
case IEEE80211_IAPP_FRAME_CACHE_RESPONSE:
/*
* XXX TODO
*/
hostapd_log(HOSTAPD_LOG_VERBOSE,
"%s/%s: received unsupported IAPP message %d\n",
cfg->c_apme_iface, cfg->c_iapp_iface,
frame->hdr.i_command);
return;
default:
return;
}
}
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