In this call to IEEE80211_NOTE, ni is always NULL due to the assignment a few lines earlier at the start of the function. If debug traces are enabled, then this will pass an invalid pointer as the 'mac' pointer to ieee80211_note_mac. Use IEEE80211_DPRINTF which doesn't take a 'ni' argument instead. Reported by: GCC -Wstringop-overread Reviewed by: bz, emaste Differential Revision: https://reviews.freebsd.org/D37626
2090 lines
66 KiB
C
2090 lines
66 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009 The FreeBSD Foundation
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*
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* This software was developed by Rui Paulo under sponsorship from the
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* FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD$");
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#endif
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/*
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* IEEE 802.11s Hybrid Wireless Mesh Protocol, HWMP.
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*
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* Based on March 2009, D3.0 802.11s draft spec.
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*/
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#include "opt_inet.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_llc.h>
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#include <net/ethernet.h>
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#include <net/bpf.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_action.h>
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#include <net80211/ieee80211_input.h>
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#include <net80211/ieee80211_mesh.h>
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static void hwmp_vattach(struct ieee80211vap *);
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static void hwmp_vdetach(struct ieee80211vap *);
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static int hwmp_newstate(struct ieee80211vap *,
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enum ieee80211_state, int);
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static int hwmp_send_action(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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uint8_t *, size_t);
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static uint8_t * hwmp_add_meshpreq(uint8_t *,
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const struct ieee80211_meshpreq_ie *);
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static uint8_t * hwmp_add_meshprep(uint8_t *,
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const struct ieee80211_meshprep_ie *);
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static uint8_t * hwmp_add_meshperr(uint8_t *,
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const struct ieee80211_meshperr_ie *);
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static uint8_t * hwmp_add_meshrann(uint8_t *,
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const struct ieee80211_meshrann_ie *);
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static void hwmp_rootmode_setup(struct ieee80211vap *);
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static void hwmp_rootmode_cb(void *);
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static void hwmp_rootmode_rann_cb(void *);
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static void hwmp_recv_preq(struct ieee80211vap *, struct ieee80211_node *,
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const struct ieee80211_frame *,
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const struct ieee80211_meshpreq_ie *);
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static int hwmp_send_preq(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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struct ieee80211_meshpreq_ie *,
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struct timeval *, struct timeval *);
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static void hwmp_recv_prep(struct ieee80211vap *, struct ieee80211_node *,
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const struct ieee80211_frame *,
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const struct ieee80211_meshprep_ie *);
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static int hwmp_send_prep(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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struct ieee80211_meshprep_ie *);
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static void hwmp_recv_perr(struct ieee80211vap *, struct ieee80211_node *,
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const struct ieee80211_frame *,
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const struct ieee80211_meshperr_ie *);
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static int hwmp_send_perr(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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struct ieee80211_meshperr_ie *);
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static void hwmp_senderror(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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struct ieee80211_mesh_route *, int);
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static void hwmp_recv_rann(struct ieee80211vap *, struct ieee80211_node *,
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const struct ieee80211_frame *,
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const struct ieee80211_meshrann_ie *);
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static int hwmp_send_rann(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN],
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struct ieee80211_meshrann_ie *);
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static struct ieee80211_node *
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hwmp_discover(struct ieee80211vap *,
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const uint8_t [IEEE80211_ADDR_LEN], struct mbuf *);
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static void hwmp_peerdown(struct ieee80211_node *);
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static struct timeval ieee80211_hwmp_preqminint = { 0, 100000 };
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static struct timeval ieee80211_hwmp_perrminint = { 0, 100000 };
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/* NB: the Target Address set in a Proactive PREQ is the broadcast address. */
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static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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typedef uint32_t ieee80211_hwmp_seq;
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#define HWMP_SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0)
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#define HWMP_SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0)
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#define HWMP_SEQ_EQ(a, b) ((int32_t)((a)-(b)) == 0)
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#define HWMP_SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0)
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#define HWMP_SEQ_MAX(a, b) (a > b ? a : b)
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/*
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* Private extension of ieee80211_mesh_route.
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*/
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struct ieee80211_hwmp_route {
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ieee80211_hwmp_seq hr_seq; /* last HWMP seq seen from dst*/
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ieee80211_hwmp_seq hr_preqid; /* last PREQ ID seen from dst */
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ieee80211_hwmp_seq hr_origseq; /* seq. no. on our latest PREQ*/
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struct timeval hr_lastpreq; /* last time we sent a PREQ */
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struct timeval hr_lastrootconf; /* last sent PREQ root conf */
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int hr_preqretries; /* number of discoveries */
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int hr_lastdiscovery; /* last discovery in ticks */
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};
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struct ieee80211_hwmp_state {
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ieee80211_hwmp_seq hs_seq; /* next seq to be used */
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ieee80211_hwmp_seq hs_preqid; /* next PREQ ID to be used */
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int hs_rootmode; /* proactive HWMP */
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struct timeval hs_lastperr; /* last time we sent a PERR */
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struct callout hs_roottimer;
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uint8_t hs_maxhops; /* max hop count */
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};
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static SYSCTL_NODE(_net_wlan, OID_AUTO, hwmp, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
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"IEEE 802.11s HWMP parameters");
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static int ieee80211_hwmp_targetonly = 0;
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SYSCTL_INT(_net_wlan_hwmp, OID_AUTO, targetonly, CTLFLAG_RW,
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&ieee80211_hwmp_targetonly, 0, "Set TO bit on generated PREQs");
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static int ieee80211_hwmp_pathtimeout = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, pathlifetime,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_pathtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
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"path entry lifetime (ms)");
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static int ieee80211_hwmp_maxpreq_retries = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, maxpreq_retries,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_maxpreq_retries, 0, ieee80211_sysctl_msecs_ticks, "I",
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"maximum number of preq retries");
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static int ieee80211_hwmp_net_diameter_traversaltime = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, net_diameter_traversal_time,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_net_diameter_traversaltime, 0,
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ieee80211_sysctl_msecs_ticks, "I",
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"estimate traversal time across the MBSS (ms)");
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static int ieee80211_hwmp_roottimeout = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, roottimeout,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_roottimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
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"root PREQ timeout (ms)");
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static int ieee80211_hwmp_rootint = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootint,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_rootint, 0, ieee80211_sysctl_msecs_ticks, "I",
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"root interval (ms)");
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static int ieee80211_hwmp_rannint = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rannint,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_rannint, 0, ieee80211_sysctl_msecs_ticks, "I",
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"root announcement interval (ms)");
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static struct timeval ieee80211_hwmp_rootconfint = { 0, 0 };
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static int ieee80211_hwmp_rootconfint_internal = -1;
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootconfint,
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CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
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&ieee80211_hwmp_rootconfint_internal, 0, ieee80211_sysctl_msecs_ticks, "I",
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"root confirmation interval (ms) (read-only)");
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#define IEEE80211_HWMP_DEFAULT_MAXHOPS 31
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static ieee80211_recv_action_func hwmp_recv_action_meshpath;
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static struct ieee80211_mesh_proto_path mesh_proto_hwmp = {
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.mpp_descr = "HWMP",
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.mpp_ie = IEEE80211_MESHCONF_PATH_HWMP,
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.mpp_discover = hwmp_discover,
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.mpp_peerdown = hwmp_peerdown,
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.mpp_senderror = hwmp_senderror,
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.mpp_vattach = hwmp_vattach,
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.mpp_vdetach = hwmp_vdetach,
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.mpp_newstate = hwmp_newstate,
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.mpp_privlen = sizeof(struct ieee80211_hwmp_route),
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};
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SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, inact,
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CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
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&mesh_proto_hwmp.mpp_inact, 0, ieee80211_sysctl_msecs_ticks, "I",
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"mesh route inactivity timeout (ms)");
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static void
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ieee80211_hwmp_init(void)
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{
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/* Default values as per amendment */
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ieee80211_hwmp_pathtimeout = msecs_to_ticks(5*1000);
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ieee80211_hwmp_roottimeout = msecs_to_ticks(5*1000);
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ieee80211_hwmp_rootint = msecs_to_ticks(2*1000);
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ieee80211_hwmp_rannint = msecs_to_ticks(1*1000);
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ieee80211_hwmp_rootconfint_internal = msecs_to_ticks(2*1000);
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ieee80211_hwmp_maxpreq_retries = 3;
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/*
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* (TU): A measurement of time equal to 1024 μs,
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* 500 TU is 512 ms.
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*/
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ieee80211_hwmp_net_diameter_traversaltime = msecs_to_ticks(512);
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/*
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* NB: I dont know how to make SYSCTL_PROC that calls ms to ticks
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* and return a struct timeval...
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*/
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ieee80211_hwmp_rootconfint.tv_usec =
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ieee80211_hwmp_rootconfint_internal * 1000;
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/*
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* Register action frame handler.
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*/
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ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
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IEEE80211_ACTION_MESH_HWMP, hwmp_recv_action_meshpath);
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/* NB: default is 5 secs per spec */
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mesh_proto_hwmp.mpp_inact = msecs_to_ticks(5*1000);
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/*
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* Register HWMP.
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*/
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ieee80211_mesh_register_proto_path(&mesh_proto_hwmp);
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}
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SYSINIT(wlan_hwmp, SI_SUB_DRIVERS, SI_ORDER_SECOND, ieee80211_hwmp_init, NULL);
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static void
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hwmp_vattach(struct ieee80211vap *vap)
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{
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struct ieee80211_hwmp_state *hs;
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KASSERT(vap->iv_opmode == IEEE80211_M_MBSS,
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("not a mesh vap, opmode %d", vap->iv_opmode));
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hs = IEEE80211_MALLOC(sizeof(struct ieee80211_hwmp_state), M_80211_VAP,
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IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
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if (hs == NULL) {
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printf("%s: couldn't alloc HWMP state\n", __func__);
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return;
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}
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hs->hs_maxhops = IEEE80211_HWMP_DEFAULT_MAXHOPS;
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callout_init(&hs->hs_roottimer, 1);
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vap->iv_hwmp = hs;
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}
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static void
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hwmp_vdetach(struct ieee80211vap *vap)
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{
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struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
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callout_drain(&hs->hs_roottimer);
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IEEE80211_FREE(vap->iv_hwmp, M_80211_VAP);
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vap->iv_hwmp = NULL;
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}
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static int
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hwmp_newstate(struct ieee80211vap *vap, enum ieee80211_state ostate, int arg)
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{
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enum ieee80211_state nstate = vap->iv_state;
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struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
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__func__, ieee80211_state_name[ostate],
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ieee80211_state_name[nstate], arg);
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if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
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callout_drain(&hs->hs_roottimer);
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if (nstate == IEEE80211_S_RUN)
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hwmp_rootmode_setup(vap);
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return 0;
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}
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|
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/*
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* Verify the length of an HWMP PREQ and return the number
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* of destinations >= 1, if verification fails -1 is returned.
|
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*/
|
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static int
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verify_mesh_preq_len(struct ieee80211vap *vap,
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const struct ieee80211_frame *wh, const uint8_t *iefrm)
|
|
{
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int alloc_sz = -1;
|
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int ndest = -1;
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if (iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE) {
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/* Originator External Address present */
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alloc_sz = IEEE80211_MESHPREQ_BASE_SZ_AE;
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ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET_AE];
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} else {
|
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/* w/o Originator External Address */
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alloc_sz = IEEE80211_MESHPREQ_BASE_SZ;
|
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ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET];
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}
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alloc_sz += ndest * IEEE80211_MESHPREQ_TRGT_SZ;
|
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|
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if(iefrm[1] != (alloc_sz)) {
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IEEE80211_DISCARD(vap,
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IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
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wh, NULL, "PREQ (AE=%s) with wrong len",
|
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iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE ? "1" : "0");
|
|
return (-1);
|
|
}
|
|
return ndest;
|
|
}
|
|
|
|
/*
|
|
* Verify the length of an HWMP PREP and returns 1 on success,
|
|
* otherwise -1.
|
|
*/
|
|
static int
|
|
verify_mesh_prep_len(struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh, const uint8_t *iefrm)
|
|
{
|
|
int alloc_sz = -1;
|
|
if (iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE) {
|
|
if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ_AE)
|
|
alloc_sz = IEEE80211_MESHPREP_BASE_SZ_AE;
|
|
} else if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ)
|
|
alloc_sz = IEEE80211_MESHPREP_BASE_SZ;
|
|
if(alloc_sz < 0) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
|
wh, NULL, "PREP (AE=%s) with wrong len",
|
|
iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE ? "1" : "0");
|
|
return (-1);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Verify the length of an HWMP PERR and return the number
|
|
* of destinations >= 1, if verification fails -1 is returned.
|
|
*/
|
|
static int
|
|
verify_mesh_perr_len(struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh, const uint8_t *iefrm)
|
|
{
|
|
int alloc_sz = -1;
|
|
const uint8_t *iefrm_t = iefrm;
|
|
uint8_t ndest = iefrm_t[IEEE80211_MESHPERR_NDEST_OFFSET];
|
|
int i;
|
|
|
|
if(ndest > IEEE80211_MESHPERR_MAXDEST) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
|
wh, NULL, "PERR with wrong number of destionat (>19), %u",
|
|
ndest);
|
|
return (-1);
|
|
}
|
|
|
|
iefrm_t += IEEE80211_MESHPERR_NDEST_OFFSET + 1; /* flag is next field */
|
|
/* We need to check each destination flag to know size */
|
|
for(i = 0; i<ndest; i++) {
|
|
if ((*iefrm_t) & IEEE80211_MESHPERR_FLAGS_AE)
|
|
iefrm_t += IEEE80211_MESHPERR_DEST_SZ_AE;
|
|
else
|
|
iefrm_t += IEEE80211_MESHPERR_DEST_SZ;
|
|
}
|
|
|
|
alloc_sz = (iefrm_t - iefrm) - 2; /* action + code */
|
|
if(alloc_sz != iefrm[1]) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
|
wh, NULL, "%s", "PERR with wrong len");
|
|
return (-1);
|
|
}
|
|
return ndest;
|
|
}
|
|
|
|
static int
|
|
hwmp_recv_action_meshpath(struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh,
|
|
const uint8_t *frm, const uint8_t *efrm)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211_meshpreq_ie *preq;
|
|
struct ieee80211_meshprep_ie *prep;
|
|
struct ieee80211_meshperr_ie *perr;
|
|
struct ieee80211_meshrann_ie rann;
|
|
const uint8_t *iefrm = frm + 2; /* action + code */
|
|
const uint8_t *iefrm_t = iefrm; /* temporary pointer */
|
|
int ndest = -1;
|
|
int found = 0;
|
|
|
|
while (efrm - iefrm > 1) {
|
|
IEEE80211_VERIFY_LENGTH(efrm - iefrm, iefrm[1] + 2, return 0);
|
|
switch (*iefrm) {
|
|
case IEEE80211_ELEMID_MESHPREQ:
|
|
{
|
|
int i = 0;
|
|
|
|
iefrm_t = iefrm;
|
|
ndest = verify_mesh_preq_len(vap, wh, iefrm_t);
|
|
if (ndest < 0) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
preq = IEEE80211_MALLOC(sizeof(*preq) +
|
|
(ndest - 1) * sizeof(*preq->preq_targets),
|
|
M_80211_MESH_PREQ,
|
|
IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
|
|
KASSERT(preq != NULL, ("preq == NULL"));
|
|
|
|
preq->preq_ie = *iefrm_t++;
|
|
preq->preq_len = *iefrm_t++;
|
|
preq->preq_flags = *iefrm_t++;
|
|
preq->preq_hopcount = *iefrm_t++;
|
|
preq->preq_ttl = *iefrm_t++;
|
|
preq->preq_id = le32dec(iefrm_t); iefrm_t += 4;
|
|
IEEE80211_ADDR_COPY(preq->preq_origaddr, iefrm_t);
|
|
iefrm_t += 6;
|
|
preq->preq_origseq = le32dec(iefrm_t); iefrm_t += 4;
|
|
/* NB: may have Originator Proxied Address */
|
|
if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(
|
|
preq->preq_orig_ext_addr, iefrm_t);
|
|
iefrm_t += 6;
|
|
}
|
|
preq->preq_lifetime = le32dec(iefrm_t); iefrm_t += 4;
|
|
preq->preq_metric = le32dec(iefrm_t); iefrm_t += 4;
|
|
preq->preq_tcount = *iefrm_t++;
|
|
|
|
for (i = 0; i < preq->preq_tcount; i++) {
|
|
preq->preq_targets[i].target_flags = *iefrm_t++;
|
|
IEEE80211_ADDR_COPY(
|
|
preq->preq_targets[i].target_addr, iefrm_t);
|
|
iefrm_t += 6;
|
|
preq->preq_targets[i].target_seq =
|
|
le32dec(iefrm_t);
|
|
iefrm_t += 4;
|
|
}
|
|
|
|
hwmp_recv_preq(vap, ni, wh, preq);
|
|
IEEE80211_FREE(preq, M_80211_MESH_PREQ);
|
|
found++;
|
|
break;
|
|
}
|
|
case IEEE80211_ELEMID_MESHPREP:
|
|
{
|
|
iefrm_t = iefrm;
|
|
ndest = verify_mesh_prep_len(vap, wh, iefrm_t);
|
|
if (ndest < 0) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
prep = IEEE80211_MALLOC(sizeof(*prep),
|
|
M_80211_MESH_PREP,
|
|
IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
|
|
KASSERT(prep != NULL, ("prep == NULL"));
|
|
|
|
prep->prep_ie = *iefrm_t++;
|
|
prep->prep_len = *iefrm_t++;
|
|
prep->prep_flags = *iefrm_t++;
|
|
prep->prep_hopcount = *iefrm_t++;
|
|
prep->prep_ttl = *iefrm_t++;
|
|
IEEE80211_ADDR_COPY(prep->prep_targetaddr, iefrm_t);
|
|
iefrm_t += 6;
|
|
prep->prep_targetseq = le32dec(iefrm_t); iefrm_t += 4;
|
|
/* NB: May have Target Proxied Address */
|
|
if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(
|
|
prep->prep_target_ext_addr, iefrm_t);
|
|
iefrm_t += 6;
|
|
}
|
|
prep->prep_lifetime = le32dec(iefrm_t); iefrm_t += 4;
|
|
prep->prep_metric = le32dec(iefrm_t); iefrm_t += 4;
|
|
IEEE80211_ADDR_COPY(prep->prep_origaddr, iefrm_t);
|
|
iefrm_t += 6;
|
|
prep->prep_origseq = le32dec(iefrm_t); iefrm_t += 4;
|
|
|
|
hwmp_recv_prep(vap, ni, wh, prep);
|
|
IEEE80211_FREE(prep, M_80211_MESH_PREP);
|
|
found++;
|
|
break;
|
|
}
|
|
case IEEE80211_ELEMID_MESHPERR:
|
|
{
|
|
int i = 0;
|
|
|
|
iefrm_t = iefrm;
|
|
ndest = verify_mesh_perr_len(vap, wh, iefrm_t);
|
|
if (ndest < 0) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
perr = IEEE80211_MALLOC(sizeof(*perr) +
|
|
(ndest - 1) * sizeof(*perr->perr_dests),
|
|
M_80211_MESH_PERR,
|
|
IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
|
|
KASSERT(perr != NULL, ("perr == NULL"));
|
|
|
|
perr->perr_ie = *iefrm_t++;
|
|
perr->perr_len = *iefrm_t++;
|
|
perr->perr_ttl = *iefrm_t++;
|
|
perr->perr_ndests = *iefrm_t++;
|
|
|
|
for (i = 0; i<perr->perr_ndests; i++) {
|
|
perr->perr_dests[i].dest_flags = *iefrm_t++;
|
|
IEEE80211_ADDR_COPY(
|
|
perr->perr_dests[i].dest_addr, iefrm_t);
|
|
iefrm_t += 6;
|
|
perr->perr_dests[i].dest_seq = le32dec(iefrm_t);
|
|
iefrm_t += 4;
|
|
/* NB: May have Target Proxied Address */
|
|
if (perr->perr_dests[i].dest_flags &
|
|
IEEE80211_MESHPERR_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(
|
|
perr->perr_dests[i].dest_ext_addr,
|
|
iefrm_t);
|
|
iefrm_t += 6;
|
|
}
|
|
perr->perr_dests[i].dest_rcode =
|
|
le16dec(iefrm_t);
|
|
iefrm_t += 2;
|
|
}
|
|
|
|
hwmp_recv_perr(vap, ni, wh, perr);
|
|
IEEE80211_FREE(perr, M_80211_MESH_PERR);
|
|
found++;
|
|
break;
|
|
}
|
|
case IEEE80211_ELEMID_MESHRANN:
|
|
{
|
|
const struct ieee80211_meshrann_ie *mrann =
|
|
(const struct ieee80211_meshrann_ie *) iefrm;
|
|
if (mrann->rann_len !=
|
|
sizeof(struct ieee80211_meshrann_ie) - 2) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
|
wh, NULL, "%s", "RAN with wrong len");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return 1;
|
|
}
|
|
memcpy(&rann, mrann, sizeof(rann));
|
|
rann.rann_seq = le32dec(&mrann->rann_seq);
|
|
rann.rann_interval = le32dec(&mrann->rann_interval);
|
|
rann.rann_metric = le32dec(&mrann->rann_metric);
|
|
hwmp_recv_rann(vap, ni, wh, &rann);
|
|
found++;
|
|
break;
|
|
}
|
|
}
|
|
iefrm += iefrm[1] + 2;
|
|
}
|
|
if (!found) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP,
|
|
wh, NULL, "%s", "PATH SEL action without IE");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
hwmp_send_action(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
uint8_t *ie, size_t len)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
struct ieee80211com *ic;
|
|
struct ieee80211_bpf_params params;
|
|
struct mbuf *m;
|
|
uint8_t *frm;
|
|
int ret;
|
|
|
|
if (IEEE80211_IS_MULTICAST(da)) {
|
|
ni = ieee80211_ref_node(vap->iv_bss);
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
|
|
"ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
|
|
__func__, __LINE__,
|
|
ni, ether_sprintf(ni->ni_macaddr),
|
|
ieee80211_node_refcnt(ni)+1);
|
|
#endif
|
|
ieee80211_ref_node(ni);
|
|
}
|
|
else
|
|
ni = ieee80211_mesh_find_txnode(vap, da);
|
|
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
|
|
"block %s frame in CAC state", "HWMP action");
|
|
vap->iv_stats.is_tx_badstate++;
|
|
return EIO; /* XXX */
|
|
}
|
|
|
|
KASSERT(ni != NULL, ("null node"));
|
|
ic = ni->ni_ic;
|
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
sizeof(struct ieee80211_action) + len
|
|
);
|
|
if (m == NULL) {
|
|
ieee80211_free_node(ni);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return ENOMEM;
|
|
}
|
|
*frm++ = IEEE80211_ACTION_CAT_MESH;
|
|
*frm++ = IEEE80211_ACTION_MESH_HWMP;
|
|
switch (*ie) {
|
|
case IEEE80211_ELEMID_MESHPREQ:
|
|
frm = hwmp_add_meshpreq(frm,
|
|
(struct ieee80211_meshpreq_ie *)ie);
|
|
break;
|
|
case IEEE80211_ELEMID_MESHPREP:
|
|
frm = hwmp_add_meshprep(frm,
|
|
(struct ieee80211_meshprep_ie *)ie);
|
|
break;
|
|
case IEEE80211_ELEMID_MESHPERR:
|
|
frm = hwmp_add_meshperr(frm,
|
|
(struct ieee80211_meshperr_ie *)ie);
|
|
break;
|
|
case IEEE80211_ELEMID_MESHRANN:
|
|
frm = hwmp_add_meshrann(frm,
|
|
(struct ieee80211_meshrann_ie *)ie);
|
|
break;
|
|
}
|
|
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT);
|
|
if (m == NULL) {
|
|
ieee80211_free_node(ni);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return ENOMEM;
|
|
}
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
|
|
ieee80211_send_setup(ni, m,
|
|
IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
|
|
IEEE80211_NONQOS_TID, vap->iv_myaddr, da, vap->iv_myaddr);
|
|
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
IEEE80211_NODE_STAT(ni, tx_mgmt);
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
params.ibp_pri = WME_AC_VO;
|
|
params.ibp_rate0 = ni->ni_txparms->mgmtrate;
|
|
if (IEEE80211_IS_MULTICAST(da))
|
|
params.ibp_try0 = 1;
|
|
else
|
|
params.ibp_try0 = ni->ni_txparms->maxretry;
|
|
params.ibp_power = ni->ni_txpower;
|
|
ret = ieee80211_raw_output(vap, ni, m, ¶ms);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
return (ret);
|
|
}
|
|
|
|
#define ADDSHORT(frm, v) do { \
|
|
le16enc(frm, v); \
|
|
frm += 2; \
|
|
} while (0)
|
|
#define ADDWORD(frm, v) do { \
|
|
le32enc(frm, v); \
|
|
frm += 4; \
|
|
} while (0)
|
|
/*
|
|
* Add a Mesh Path Request IE to a frame.
|
|
*/
|
|
#define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags
|
|
#define PREQ_TADDR(n) preq->preq_targets[n].target_addr
|
|
#define PREQ_TSEQ(n) preq->preq_targets[n].target_seq
|
|
static uint8_t *
|
|
hwmp_add_meshpreq(uint8_t *frm, const struct ieee80211_meshpreq_ie *preq)
|
|
{
|
|
int i;
|
|
|
|
*frm++ = IEEE80211_ELEMID_MESHPREQ;
|
|
*frm++ = preq->preq_len; /* len already calculated */
|
|
*frm++ = preq->preq_flags;
|
|
*frm++ = preq->preq_hopcount;
|
|
*frm++ = preq->preq_ttl;
|
|
ADDWORD(frm, preq->preq_id);
|
|
IEEE80211_ADDR_COPY(frm, preq->preq_origaddr); frm += 6;
|
|
ADDWORD(frm, preq->preq_origseq);
|
|
if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(frm, preq->preq_orig_ext_addr);
|
|
frm += 6;
|
|
}
|
|
ADDWORD(frm, preq->preq_lifetime);
|
|
ADDWORD(frm, preq->preq_metric);
|
|
*frm++ = preq->preq_tcount;
|
|
for (i = 0; i < preq->preq_tcount; i++) {
|
|
*frm++ = PREQ_TFLAGS(i);
|
|
IEEE80211_ADDR_COPY(frm, PREQ_TADDR(i));
|
|
frm += 6;
|
|
ADDWORD(frm, PREQ_TSEQ(i));
|
|
}
|
|
return frm;
|
|
}
|
|
#undef PREQ_TFLAGS
|
|
#undef PREQ_TADDR
|
|
#undef PREQ_TSEQ
|
|
|
|
/*
|
|
* Add a Mesh Path Reply IE to a frame.
|
|
*/
|
|
static uint8_t *
|
|
hwmp_add_meshprep(uint8_t *frm, const struct ieee80211_meshprep_ie *prep)
|
|
{
|
|
*frm++ = IEEE80211_ELEMID_MESHPREP;
|
|
*frm++ = prep->prep_len; /* len already calculated */
|
|
*frm++ = prep->prep_flags;
|
|
*frm++ = prep->prep_hopcount;
|
|
*frm++ = prep->prep_ttl;
|
|
IEEE80211_ADDR_COPY(frm, prep->prep_targetaddr); frm += 6;
|
|
ADDWORD(frm, prep->prep_targetseq);
|
|
if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(frm, prep->prep_target_ext_addr);
|
|
frm += 6;
|
|
}
|
|
ADDWORD(frm, prep->prep_lifetime);
|
|
ADDWORD(frm, prep->prep_metric);
|
|
IEEE80211_ADDR_COPY(frm, prep->prep_origaddr); frm += 6;
|
|
ADDWORD(frm, prep->prep_origseq);
|
|
return frm;
|
|
}
|
|
|
|
/*
|
|
* Add a Mesh Path Error IE to a frame.
|
|
*/
|
|
#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags
|
|
#define PERR_DADDR(n) perr->perr_dests[n].dest_addr
|
|
#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq
|
|
#define PERR_EXTADDR(n) perr->perr_dests[n].dest_ext_addr
|
|
#define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode
|
|
static uint8_t *
|
|
hwmp_add_meshperr(uint8_t *frm, const struct ieee80211_meshperr_ie *perr)
|
|
{
|
|
int i;
|
|
|
|
*frm++ = IEEE80211_ELEMID_MESHPERR;
|
|
*frm++ = perr->perr_len; /* len already calculated */
|
|
*frm++ = perr->perr_ttl;
|
|
*frm++ = perr->perr_ndests;
|
|
for (i = 0; i < perr->perr_ndests; i++) {
|
|
*frm++ = PERR_DFLAGS(i);
|
|
IEEE80211_ADDR_COPY(frm, PERR_DADDR(i));
|
|
frm += 6;
|
|
ADDWORD(frm, PERR_DSEQ(i));
|
|
if (PERR_DFLAGS(i) & IEEE80211_MESHPERR_FLAGS_AE) {
|
|
IEEE80211_ADDR_COPY(frm, PERR_EXTADDR(i));
|
|
frm += 6;
|
|
}
|
|
ADDSHORT(frm, PERR_DRCODE(i));
|
|
}
|
|
return frm;
|
|
}
|
|
#undef PERR_DFLAGS
|
|
#undef PERR_DADDR
|
|
#undef PERR_DSEQ
|
|
#undef PERR_EXTADDR
|
|
#undef PERR_DRCODE
|
|
|
|
/*
|
|
* Add a Root Annoucement IE to a frame.
|
|
*/
|
|
static uint8_t *
|
|
hwmp_add_meshrann(uint8_t *frm, const struct ieee80211_meshrann_ie *rann)
|
|
{
|
|
*frm++ = IEEE80211_ELEMID_MESHRANN;
|
|
*frm++ = rann->rann_len;
|
|
*frm++ = rann->rann_flags;
|
|
*frm++ = rann->rann_hopcount;
|
|
*frm++ = rann->rann_ttl;
|
|
IEEE80211_ADDR_COPY(frm, rann->rann_addr); frm += 6;
|
|
ADDWORD(frm, rann->rann_seq);
|
|
ADDWORD(frm, rann->rann_interval);
|
|
ADDWORD(frm, rann->rann_metric);
|
|
return frm;
|
|
}
|
|
|
|
static void
|
|
hwmp_rootmode_setup(struct ieee80211vap *vap)
|
|
{
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
|
|
switch (hs->hs_rootmode) {
|
|
case IEEE80211_HWMP_ROOTMODE_DISABLED:
|
|
callout_drain(&hs->hs_roottimer);
|
|
ms->ms_flags &= ~IEEE80211_MESHFLAGS_ROOT;
|
|
break;
|
|
case IEEE80211_HWMP_ROOTMODE_NORMAL:
|
|
case IEEE80211_HWMP_ROOTMODE_PROACTIVE:
|
|
callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rootint,
|
|
hwmp_rootmode_cb, vap);
|
|
ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT;
|
|
break;
|
|
case IEEE80211_HWMP_ROOTMODE_RANN:
|
|
callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rannint,
|
|
hwmp_rootmode_rann_cb, vap);
|
|
ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Send a broadcast Path Request to find all nodes on the mesh. We are
|
|
* called when the vap is configured as a HWMP root node.
|
|
*/
|
|
#define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags
|
|
#define PREQ_TADDR(n) preq.preq_targets[n].target_addr
|
|
#define PREQ_TSEQ(n) preq.preq_targets[n].target_seq
|
|
static void
|
|
hwmp_rootmode_cb(void *arg)
|
|
{
|
|
struct ieee80211vap *vap = (struct ieee80211vap *)arg;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_meshpreq_ie preq;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss,
|
|
"%s", "send broadcast PREQ");
|
|
|
|
preq.preq_flags = 0;
|
|
if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
|
|
preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_GATE;
|
|
if (hs->hs_rootmode == IEEE80211_HWMP_ROOTMODE_PROACTIVE)
|
|
preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_PP;
|
|
preq.preq_hopcount = 0;
|
|
preq.preq_ttl = ms->ms_ttl;
|
|
preq.preq_id = ++hs->hs_preqid;
|
|
IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr);
|
|
preq.preq_origseq = ++hs->hs_seq;
|
|
preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_roottimeout);
|
|
preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
preq.preq_tcount = 1;
|
|
IEEE80211_ADDR_COPY(PREQ_TADDR(0), broadcastaddr);
|
|
PREQ_TFLAGS(0) = IEEE80211_MESHPREQ_TFLAGS_TO |
|
|
IEEE80211_MESHPREQ_TFLAGS_USN;
|
|
PREQ_TSEQ(0) = 0;
|
|
vap->iv_stats.is_hwmp_rootreqs++;
|
|
/* NB: we enforce rate check ourself */
|
|
hwmp_send_preq(vap, broadcastaddr, &preq, NULL, NULL);
|
|
hwmp_rootmode_setup(vap);
|
|
}
|
|
#undef PREQ_TFLAGS
|
|
#undef PREQ_TADDR
|
|
#undef PREQ_TSEQ
|
|
|
|
/*
|
|
* Send a Root Annoucement (RANN) to find all the nodes on the mesh. We are
|
|
* called when the vap is configured as a HWMP RANN root node.
|
|
*/
|
|
static void
|
|
hwmp_rootmode_rann_cb(void *arg)
|
|
{
|
|
struct ieee80211vap *vap = (struct ieee80211vap *)arg;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_meshrann_ie rann;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss,
|
|
"%s", "send broadcast RANN");
|
|
|
|
rann.rann_flags = 0;
|
|
if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
|
|
rann.rann_flags |= IEEE80211_MESHFLAGS_GATE;
|
|
rann.rann_hopcount = 0;
|
|
rann.rann_ttl = ms->ms_ttl;
|
|
IEEE80211_ADDR_COPY(rann.rann_addr, vap->iv_myaddr);
|
|
rann.rann_seq = ++hs->hs_seq;
|
|
rann.rann_interval = ieee80211_hwmp_rannint;
|
|
rann.rann_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
|
|
vap->iv_stats.is_hwmp_rootrann++;
|
|
hwmp_send_rann(vap, broadcastaddr, &rann);
|
|
hwmp_rootmode_setup(vap);
|
|
}
|
|
|
|
/*
|
|
* Update forwarding information to TA if metric improves.
|
|
*/
|
|
static void
|
|
hwmp_update_transmitter(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
const char *hwmp_frame)
|
|
{
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_mesh_route *rttran = NULL; /* Transmitter */
|
|
int metric = 0;
|
|
|
|
rttran = ieee80211_mesh_rt_find(vap, ni->ni_macaddr);
|
|
if (rttran == NULL) {
|
|
rttran = ieee80211_mesh_rt_add(vap, ni->ni_macaddr);
|
|
if (rttran == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"unable to add path to transmitter %6D of %s",
|
|
ni->ni_macaddr, ":", hwmp_frame);
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
}
|
|
metric = ms->ms_pmetric->mpm_metric(ni);
|
|
if (!(rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) ||
|
|
rttran->rt_metric > metric)
|
|
{
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"%s path to transmitter %6D of %s, metric %d:%d",
|
|
rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ?
|
|
"prefer" : "update", ni->ni_macaddr, ":", hwmp_frame,
|
|
rttran->rt_metric, metric);
|
|
IEEE80211_ADDR_COPY(rttran->rt_nexthop, ni->ni_macaddr);
|
|
rttran->rt_metric = metric;
|
|
rttran->rt_nhops = 1;
|
|
ieee80211_mesh_rt_update(rttran, ms->ms_ppath->mpp_inact);
|
|
rttran->rt_flags = IEEE80211_MESHRT_FLAGS_VALID;
|
|
}
|
|
}
|
|
|
|
#define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags
|
|
#define PREQ_TADDR(n) preq->preq_targets[n].target_addr
|
|
#define PREQ_TSEQ(n) preq->preq_targets[n].target_seq
|
|
static void
|
|
hwmp_recv_preq(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh, const struct ieee80211_meshpreq_ie *preq)
|
|
{
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_mesh_route *rtorig = NULL;
|
|
struct ieee80211_mesh_route *rtorig_ext = NULL;
|
|
struct ieee80211_mesh_route *rttarg = NULL;
|
|
struct ieee80211_hwmp_route *hrorig = NULL;
|
|
struct ieee80211_hwmp_route *hrtarg = NULL;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
ieee80211_hwmp_seq preqid; /* last seen preqid for orig */
|
|
uint32_t metric = 0;
|
|
|
|
/*
|
|
* Ignore PREQs from us. Could happen because someone forward it
|
|
* back to us.
|
|
*/
|
|
if (IEEE80211_ADDR_EQ(vap->iv_myaddr, preq->preq_origaddr))
|
|
return;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"received PREQ, orig %6D, targ(0) %6D", preq->preq_origaddr, ":",
|
|
PREQ_TADDR(0), ":");
|
|
|
|
/*
|
|
* Acceptance criteria: (if the PREQ is not for us or not broadcast,
|
|
* or an external mac address not proxied by us),
|
|
* AND forwarding is disabled, discard this PREQ.
|
|
*/
|
|
rttarg = ieee80211_mesh_rt_find(vap, PREQ_TADDR(0));
|
|
if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD) &&
|
|
(!IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) ||
|
|
!IEEE80211_IS_MULTICAST(PREQ_TADDR(0)) ||
|
|
(rttarg != NULL &&
|
|
rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY &&
|
|
IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate)))) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP,
|
|
preq->preq_origaddr, NULL, "%s", "not accepting PREQ");
|
|
return;
|
|
}
|
|
/*
|
|
* Acceptance criteria: if unicast addressed
|
|
* AND no valid forwarding for Target of PREQ, discard this PREQ.
|
|
*/
|
|
if(rttarg != NULL)
|
|
hrtarg = IEEE80211_MESH_ROUTE_PRIV(rttarg,
|
|
struct ieee80211_hwmp_route);
|
|
/* Address mode: ucast */
|
|
if(preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AM &&
|
|
rttarg == NULL &&
|
|
!IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0))) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP,
|
|
preq->preq_origaddr, NULL,
|
|
"unicast addressed PREQ of unknown target %6D",
|
|
PREQ_TADDR(0), ":");
|
|
return;
|
|
}
|
|
|
|
/* PREQ ACCEPTED */
|
|
|
|
rtorig = ieee80211_mesh_rt_find(vap, preq->preq_origaddr);
|
|
if (rtorig == NULL) {
|
|
rtorig = ieee80211_mesh_rt_add(vap, preq->preq_origaddr);
|
|
if (rtorig == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"unable to add orig path to %6D",
|
|
preq->preq_origaddr, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"adding originator %6D", preq->preq_origaddr, ":");
|
|
}
|
|
hrorig = IEEE80211_MESH_ROUTE_PRIV(rtorig, struct ieee80211_hwmp_route);
|
|
|
|
/* record last seen preqid */
|
|
preqid = hrorig->hr_preqid;
|
|
hrorig->hr_preqid = HWMP_SEQ_MAX(hrorig->hr_preqid, preq->preq_id);
|
|
|
|
/* Data creation and update of forwarding information
|
|
* according to Table 11C-8 for originator mesh STA.
|
|
*/
|
|
metric = preq->preq_metric + ms->ms_pmetric->mpm_metric(ni);
|
|
if (HWMP_SEQ_GT(preq->preq_origseq, hrorig->hr_seq) ||
|
|
(HWMP_SEQ_EQ(preq->preq_origseq, hrorig->hr_seq) &&
|
|
metric < rtorig->rt_metric)) {
|
|
hrorig->hr_seq = preq->preq_origseq;
|
|
IEEE80211_ADDR_COPY(rtorig->rt_nexthop, wh->i_addr2);
|
|
rtorig->rt_metric = metric;
|
|
rtorig->rt_nhops = preq->preq_hopcount + 1;
|
|
ieee80211_mesh_rt_update(rtorig, preq->preq_lifetime);
|
|
/* Path to orig is valid now.
|
|
* NB: we know it can't be Proxy, and if it is GATE
|
|
* it will be marked below.
|
|
*/
|
|
rtorig->rt_flags = IEEE80211_MESHRT_FLAGS_VALID;
|
|
} else if ((hrtarg != NULL &&
|
|
!HWMP_SEQ_EQ(hrtarg->hr_seq, PREQ_TSEQ(0))) ||
|
|
(rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID &&
|
|
preqid >= preq->preq_id)) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"discard PREQ from %6D, old seqno %u <= %u,"
|
|
" or old preqid %u < %u",
|
|
preq->preq_origaddr, ":",
|
|
preq->preq_origseq, hrorig->hr_seq,
|
|
preq->preq_id, preqid);
|
|
return;
|
|
}
|
|
|
|
/* Update forwarding information to TA if metric improves. */
|
|
hwmp_update_transmitter(vap, ni, "PREQ");
|
|
|
|
/*
|
|
* Check if the PREQ is addressed to us.
|
|
* or a Proxy currently gated by us.
|
|
*/
|
|
if (IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) ||
|
|
(ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
|
|
rttarg != NULL &&
|
|
IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate) &&
|
|
rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY &&
|
|
rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) {
|
|
struct ieee80211_meshprep_ie prep;
|
|
|
|
/*
|
|
* When we are the target we shall update our own HWMP seq
|
|
* number with max of (current and preq->seq) + 1
|
|
*/
|
|
hs->hs_seq = HWMP_SEQ_MAX(hs->hs_seq, PREQ_TSEQ(0)) + 1;
|
|
|
|
prep.prep_flags = 0;
|
|
prep.prep_hopcount = 0;
|
|
prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
IEEE80211_ADDR_COPY(prep.prep_targetaddr, vap->iv_myaddr);
|
|
if (rttarg != NULL && /* if NULL it means we are the target */
|
|
rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"reply for proxy %6D", rttarg->rt_dest, ":");
|
|
prep.prep_flags |= IEEE80211_MESHPREP_FLAGS_AE;
|
|
IEEE80211_ADDR_COPY(prep.prep_target_ext_addr,
|
|
rttarg->rt_dest);
|
|
/* update proxy seqno to HWMP seqno */
|
|
rttarg->rt_ext_seq = hs->hs_seq;
|
|
prep.prep_hopcount = rttarg->rt_nhops;
|
|
prep.prep_metric = rttarg->rt_metric;
|
|
IEEE80211_ADDR_COPY(prep.prep_targetaddr, rttarg->rt_mesh_gate);
|
|
}
|
|
/*
|
|
* Build and send a PREP frame.
|
|
*/
|
|
prep.prep_ttl = ms->ms_ttl;
|
|
prep.prep_targetseq = hs->hs_seq;
|
|
prep.prep_lifetime = preq->preq_lifetime;
|
|
IEEE80211_ADDR_COPY(prep.prep_origaddr, preq->preq_origaddr);
|
|
prep.prep_origseq = preq->preq_origseq;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"reply to %6D", preq->preq_origaddr, ":");
|
|
hwmp_send_prep(vap, wh->i_addr2, &prep);
|
|
return;
|
|
}
|
|
/* we may update our proxy information for the orig external */
|
|
else if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) {
|
|
rtorig_ext =
|
|
ieee80211_mesh_rt_find(vap, preq->preq_orig_ext_addr);
|
|
if (rtorig_ext == NULL) {
|
|
rtorig_ext = ieee80211_mesh_rt_add(vap,
|
|
preq->preq_orig_ext_addr);
|
|
if (rtorig_ext == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"unable to add orig ext proxy to %6D",
|
|
preq->preq_orig_ext_addr, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
IEEE80211_ADDR_COPY(rtorig_ext->rt_mesh_gate,
|
|
preq->preq_origaddr);
|
|
}
|
|
rtorig_ext->rt_ext_seq = preq->preq_origseq;
|
|
ieee80211_mesh_rt_update(rtorig_ext, preq->preq_lifetime);
|
|
}
|
|
/*
|
|
* Proactive PREQ: reply with a proactive PREP to the
|
|
* root STA if requested.
|
|
*/
|
|
if (IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr) &&
|
|
(PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO)) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"root mesh station @ %6D", preq->preq_origaddr, ":");
|
|
|
|
/* Check if root is a mesh gate, mark it */
|
|
if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_GATE) {
|
|
struct ieee80211_mesh_gate_route *gr;
|
|
|
|
rtorig->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
|
|
gr = ieee80211_mesh_mark_gate(vap, preq->preq_origaddr,
|
|
rtorig);
|
|
gr->gr_lastseq = 0; /* NOT GANN */
|
|
}
|
|
|
|
/*
|
|
* Reply with a PREP if we don't have a path to the root
|
|
* or if the root sent us a proactive PREQ.
|
|
*/
|
|
if ((rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
|
|
(preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_PP)) {
|
|
struct ieee80211_meshprep_ie prep;
|
|
|
|
prep.prep_flags = 0;
|
|
prep.prep_hopcount = 0;
|
|
prep.prep_ttl = ms->ms_ttl;
|
|
IEEE80211_ADDR_COPY(prep.prep_origaddr,
|
|
preq->preq_origaddr);
|
|
prep.prep_origseq = preq->preq_origseq;
|
|
prep.prep_lifetime = preq->preq_lifetime;
|
|
prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
IEEE80211_ADDR_COPY(prep.prep_targetaddr,
|
|
vap->iv_myaddr);
|
|
prep.prep_targetseq = ++hs->hs_seq;
|
|
hwmp_send_prep(vap, rtorig->rt_nexthop, &prep);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Forwarding and Intermediate reply for PREQs with 1 target.
|
|
*/
|
|
if ((preq->preq_tcount == 1) && (preq->preq_ttl > 1) &&
|
|
(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
|
|
struct ieee80211_meshpreq_ie ppreq; /* propagated PREQ */
|
|
|
|
memcpy(&ppreq, preq, sizeof(ppreq));
|
|
|
|
/*
|
|
* We have a valid route to this node.
|
|
* NB: if target is proxy dont reply.
|
|
*/
|
|
if (rttarg != NULL &&
|
|
rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID &&
|
|
!(rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
|
|
/*
|
|
* Check if we can send an intermediate Path Reply,
|
|
* i.e., Target Only bit is not set and target is not
|
|
* the MAC broadcast address.
|
|
*/
|
|
if (!(PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO) &&
|
|
!IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr)) {
|
|
struct ieee80211_meshprep_ie prep;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"intermediate reply for PREQ from %6D",
|
|
preq->preq_origaddr, ":");
|
|
prep.prep_flags = 0;
|
|
prep.prep_hopcount = rttarg->rt_nhops;
|
|
prep.prep_ttl = ms->ms_ttl;
|
|
IEEE80211_ADDR_COPY(&prep.prep_targetaddr,
|
|
PREQ_TADDR(0));
|
|
prep.prep_targetseq = hrtarg->hr_seq;
|
|
prep.prep_lifetime = preq->preq_lifetime;
|
|
prep.prep_metric =rttarg->rt_metric;
|
|
IEEE80211_ADDR_COPY(&prep.prep_origaddr,
|
|
preq->preq_origaddr);
|
|
prep.prep_origseq = hrorig->hr_seq;
|
|
hwmp_send_prep(vap, rtorig->rt_nexthop, &prep);
|
|
|
|
/*
|
|
* Set TO and unset RF bits because we have
|
|
* sent a PREP.
|
|
*/
|
|
ppreq.preq_targets[0].target_flags |=
|
|
IEEE80211_MESHPREQ_TFLAGS_TO;
|
|
}
|
|
}
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"forward PREQ from %6D",
|
|
preq->preq_origaddr, ":");
|
|
ppreq.preq_hopcount += 1;
|
|
ppreq.preq_ttl -= 1;
|
|
ppreq.preq_metric += ms->ms_pmetric->mpm_metric(ni);
|
|
|
|
/* don't do PREQ ratecheck when we propagate */
|
|
hwmp_send_preq(vap, broadcastaddr, &ppreq, NULL, NULL);
|
|
}
|
|
}
|
|
#undef PREQ_TFLAGS
|
|
#undef PREQ_TADDR
|
|
#undef PREQ_TSEQ
|
|
|
|
static int
|
|
hwmp_send_preq(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
struct ieee80211_meshpreq_ie *preq,
|
|
struct timeval *last, struct timeval *minint)
|
|
{
|
|
|
|
/*
|
|
* Enforce PREQ interval.
|
|
* NB: Proactive ROOT PREQs rate is handled by cb task.
|
|
*/
|
|
if (last != NULL && minint != NULL) {
|
|
if (ratecheck(last, minint) == 0)
|
|
return EALREADY; /* XXX: we should postpone */
|
|
getmicrouptime(last);
|
|
}
|
|
|
|
/*
|
|
* mesh preq action frame format
|
|
* [6] da
|
|
* [6] sa
|
|
* [6] addr3 = sa
|
|
* [1] action
|
|
* [1] category
|
|
* [tlv] mesh path request
|
|
*/
|
|
preq->preq_ie = IEEE80211_ELEMID_MESHPREQ;
|
|
preq->preq_len = (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE ?
|
|
IEEE80211_MESHPREQ_BASE_SZ_AE : IEEE80211_MESHPREQ_BASE_SZ) +
|
|
preq->preq_tcount * IEEE80211_MESHPREQ_TRGT_SZ;
|
|
return hwmp_send_action(vap, da, (uint8_t *)preq, preq->preq_len+2);
|
|
}
|
|
|
|
static void
|
|
hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh, const struct ieee80211_meshprep_ie *prep)
|
|
{
|
|
#define IS_PROXY(rt) (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)
|
|
#define PROXIED_BY_US(rt) \
|
|
(IEEE80211_ADDR_EQ(vap->iv_myaddr, rt->rt_mesh_gate))
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_route *rt = NULL;
|
|
struct ieee80211_mesh_route *rtorig = NULL;
|
|
struct ieee80211_mesh_route *rtext = NULL;
|
|
struct ieee80211_hwmp_route *hr;
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct mbuf *m, *next;
|
|
uint32_t metric = 0;
|
|
const uint8_t *addr;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"received PREP, orig %6D, targ %6D", prep->prep_origaddr, ":",
|
|
prep->prep_targetaddr, ":");
|
|
|
|
/*
|
|
* Acceptance criteria: (If the corresponding PREP was not generated
|
|
* by us OR not generated by an external mac that is not proxied by us)
|
|
* AND forwarding is disabled, discard this PREP.
|
|
*/
|
|
rtorig = ieee80211_mesh_rt_find(vap, prep->prep_origaddr);
|
|
if ((!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) ||
|
|
(rtorig != NULL && IS_PROXY(rtorig) && !PROXIED_BY_US(rtorig))) &&
|
|
!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)){
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"discard PREP, orig(%6D) not proxied or generated by us",
|
|
prep->prep_origaddr, ":");
|
|
return;
|
|
}
|
|
|
|
/* PREP ACCEPTED */
|
|
|
|
/*
|
|
* If accepted shall create or update the active forwarding information
|
|
* it maintains for the target mesh STA of the PREP (according to the
|
|
* rules defined in 13.10.8.4). If the conditions for creating or
|
|
* updating the forwarding information have not been met in those
|
|
* rules, no further steps are applied to the PREP.
|
|
*/
|
|
rt = ieee80211_mesh_rt_find(vap, prep->prep_targetaddr);
|
|
if (rt == NULL) {
|
|
rt = ieee80211_mesh_rt_add(vap, prep->prep_targetaddr);
|
|
if (rt == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"unable to add PREP path to %6D",
|
|
prep->prep_targetaddr, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"adding target %6D", prep->prep_targetaddr, ":");
|
|
}
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
/* update path metric */
|
|
metric = prep->prep_metric + ms->ms_pmetric->mpm_metric(ni);
|
|
if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) {
|
|
if (HWMP_SEQ_LT(prep->prep_targetseq, hr->hr_seq)) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"discard PREP from %6D, old seq no %u < %u",
|
|
prep->prep_targetaddr, ":",
|
|
prep->prep_targetseq, hr->hr_seq);
|
|
return;
|
|
} else if (HWMP_SEQ_LEQ(prep->prep_targetseq, hr->hr_seq) &&
|
|
metric > rt->rt_metric) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"discard PREP from %6D, new metric %u > %u",
|
|
prep->prep_targetaddr, ":",
|
|
metric, rt->rt_metric);
|
|
return;
|
|
}
|
|
}
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"%s path to %6D, hopcount %d:%d metric %d:%d",
|
|
rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ?
|
|
"prefer" : "update",
|
|
prep->prep_targetaddr, ":",
|
|
rt->rt_nhops, prep->prep_hopcount + 1,
|
|
rt->rt_metric, metric);
|
|
|
|
hr->hr_seq = prep->prep_targetseq;
|
|
hr->hr_preqretries = 0;
|
|
IEEE80211_ADDR_COPY(rt->rt_nexthop, ni->ni_macaddr);
|
|
rt->rt_metric = metric;
|
|
rt->rt_nhops = prep->prep_hopcount + 1;
|
|
ieee80211_mesh_rt_update(rt, prep->prep_lifetime);
|
|
if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) {
|
|
/* discovery complete */
|
|
rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_DISCOVER;
|
|
}
|
|
rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; /* mark valid */
|
|
|
|
/* Update forwarding information to TA if metric improves */
|
|
hwmp_update_transmitter(vap, ni, "PREP");
|
|
|
|
/*
|
|
* If it's NOT for us, propagate the PREP
|
|
*/
|
|
if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) &&
|
|
prep->prep_ttl > 1 &&
|
|
prep->prep_hopcount < hs->hs_maxhops) {
|
|
struct ieee80211_meshprep_ie pprep; /* propagated PREP */
|
|
/*
|
|
* NB: We should already have setup the path to orig
|
|
* mesh STA when we propagated PREQ to target mesh STA,
|
|
* no PREP is generated without a corresponding PREQ.
|
|
* XXX: for now just ignore.
|
|
*/
|
|
if (rtorig == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"received PREP for an unknown orig(%6D)",
|
|
prep->prep_origaddr, ":");
|
|
return;
|
|
}
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"propagate PREP from %6D",
|
|
prep->prep_targetaddr, ":");
|
|
|
|
memcpy(&pprep, prep, sizeof(pprep));
|
|
pprep.prep_hopcount += 1;
|
|
pprep.prep_ttl -= 1;
|
|
pprep.prep_metric += ms->ms_pmetric->mpm_metric(ni);
|
|
hwmp_send_prep(vap, rtorig->rt_nexthop, &pprep);
|
|
|
|
/* precursor list for the Target Mesh STA Address is updated */
|
|
}
|
|
|
|
/*
|
|
* Check if we received a PREP w/ AE and store target external address.
|
|
* We may store target external address if recevied PREP w/ AE
|
|
* and we are not final destination
|
|
*/
|
|
if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) {
|
|
rtext = ieee80211_mesh_rt_find(vap,
|
|
prep->prep_target_ext_addr);
|
|
if (rtext == NULL) {
|
|
rtext = ieee80211_mesh_rt_add(vap,
|
|
prep->prep_target_ext_addr);
|
|
if (rtext == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"unable to add PREP path to proxy %6D",
|
|
prep->prep_targetaddr, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"%s path to %6D, hopcount %d:%d metric %d:%d",
|
|
rtext->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ?
|
|
"prefer" : "update",
|
|
prep->prep_target_ext_addr, ":",
|
|
rtext->rt_nhops, prep->prep_hopcount + 1,
|
|
rtext->rt_metric, metric);
|
|
|
|
rtext->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
|
|
IEEE80211_MESHRT_FLAGS_VALID;
|
|
IEEE80211_ADDR_COPY(rtext->rt_dest,
|
|
prep->prep_target_ext_addr);
|
|
IEEE80211_ADDR_COPY(rtext->rt_mesh_gate,
|
|
prep->prep_targetaddr);
|
|
IEEE80211_ADDR_COPY(rtext->rt_nexthop, wh->i_addr2);
|
|
rtext->rt_metric = metric;
|
|
rtext->rt_lifetime = prep->prep_lifetime;
|
|
rtext->rt_nhops = prep->prep_hopcount + 1;
|
|
rtext->rt_ext_seq = prep->prep_origseq; /* new proxy seq */
|
|
/*
|
|
* XXX: proxy entries have no HWMP priv data,
|
|
* nullify them to be sure?
|
|
*/
|
|
}
|
|
/*
|
|
* Check for frames queued awaiting path discovery.
|
|
* XXX probably can tell exactly and avoid remove call
|
|
* NB: hash may have false matches, if so they will get
|
|
* stuck back on the stageq because there won't be
|
|
* a path.
|
|
*/
|
|
addr = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ?
|
|
prep->prep_target_ext_addr : prep->prep_targetaddr;
|
|
m = ieee80211_ageq_remove(&ic->ic_stageq,
|
|
(struct ieee80211_node *)(uintptr_t)
|
|
ieee80211_mac_hash(ic, addr)); /* either dest or ext_dest */
|
|
|
|
/*
|
|
* All frames in the stageq here should be non-M_ENCAP; or things
|
|
* will get very unhappy.
|
|
*/
|
|
for (; m != NULL; m = next) {
|
|
next = m->m_nextpkt;
|
|
m->m_nextpkt = NULL;
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"flush queued frame %p len %d", m, m->m_pkthdr.len);
|
|
/*
|
|
* If the mbuf has M_ENCAP set, ensure we free it.
|
|
* Note that after if_transmit() is called, m is invalid.
|
|
*/
|
|
(void) ieee80211_vap_xmitpkt(vap, m);
|
|
}
|
|
#undef IS_PROXY
|
|
#undef PROXIED_BY_US
|
|
}
|
|
|
|
static int
|
|
hwmp_send_prep(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
struct ieee80211_meshprep_ie *prep)
|
|
{
|
|
/* NB: there's no PREP minimum interval. */
|
|
|
|
/*
|
|
* mesh prep action frame format
|
|
* [6] da
|
|
* [6] sa
|
|
* [6] addr3 = sa
|
|
* [1] action
|
|
* [1] category
|
|
* [tlv] mesh path reply
|
|
*/
|
|
prep->prep_ie = IEEE80211_ELEMID_MESHPREP;
|
|
prep->prep_len = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ?
|
|
IEEE80211_MESHPREP_BASE_SZ_AE : IEEE80211_MESHPREP_BASE_SZ;
|
|
return hwmp_send_action(vap, da, (uint8_t *)prep, prep->prep_len + 2);
|
|
}
|
|
|
|
#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags
|
|
#define PERR_DADDR(n) perr.perr_dests[n].dest_addr
|
|
#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq
|
|
#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode
|
|
static void
|
|
hwmp_peerdown(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_meshperr_ie perr;
|
|
struct ieee80211_mesh_route *rt;
|
|
struct ieee80211_hwmp_route *hr;
|
|
|
|
rt = ieee80211_mesh_rt_find(vap, ni->ni_macaddr);
|
|
if (rt == NULL)
|
|
return;
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"%s", "delete route entry");
|
|
perr.perr_ttl = ms->ms_ttl;
|
|
perr.perr_ndests = 1;
|
|
PERR_DFLAGS(0) = 0;
|
|
if (hr->hr_seq == 0)
|
|
PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_USN;
|
|
PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_RC;
|
|
IEEE80211_ADDR_COPY(PERR_DADDR(0), rt->rt_dest);
|
|
PERR_DSEQ(0) = ++hr->hr_seq;
|
|
PERR_DRCODE(0) = IEEE80211_REASON_MESH_PERR_DEST_UNREACH;
|
|
/* NB: flush everything passing through peer */
|
|
ieee80211_mesh_rt_flush_peer(vap, ni->ni_macaddr);
|
|
hwmp_send_perr(vap, broadcastaddr, &perr);
|
|
}
|
|
#undef PERR_DFLAGS
|
|
#undef PERR_DADDR
|
|
#undef PERR_DSEQ
|
|
#undef PERR_DRCODE
|
|
|
|
#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags
|
|
#define PERR_DADDR(n) perr->perr_dests[n].dest_addr
|
|
#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq
|
|
#define PERR_DEXTADDR(n) perr->perr_dests[n].dest_ext_addr
|
|
static void
|
|
hwmp_recv_perr(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh, const struct ieee80211_meshperr_ie *perr)
|
|
{
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_mesh_route *rt = NULL;
|
|
struct ieee80211_mesh_route *rt_ext = NULL;
|
|
struct ieee80211_hwmp_route *hr;
|
|
struct ieee80211_meshperr_ie *pperr = NULL;
|
|
int i, j = 0, forward = 0;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"received PERR from %6D", wh->i_addr2, ":");
|
|
|
|
/*
|
|
* if forwarding is true, prepare pperr
|
|
*/
|
|
if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
|
|
forward = 1;
|
|
pperr = IEEE80211_MALLOC(sizeof(*perr) + 31*sizeof(*perr->perr_dests),
|
|
M_80211_MESH_PERR, IEEE80211_M_NOWAIT); /* XXX: magic number, 32 err dests */
|
|
}
|
|
|
|
/*
|
|
* Acceptance criteria: check if we have forwarding information
|
|
* stored about destination, and that nexthop == TA of this PERR.
|
|
* NB: we also build a new PERR to propagate in case we should forward.
|
|
*/
|
|
for (i = 0; i < perr->perr_ndests; i++) {
|
|
rt = ieee80211_mesh_rt_find(vap, PERR_DADDR(i));
|
|
if (rt == NULL)
|
|
continue;
|
|
if (!IEEE80211_ADDR_EQ(rt->rt_nexthop, wh->i_addr2))
|
|
continue;
|
|
|
|
/* found and accepted a PERR ndest element, process it... */
|
|
if (forward)
|
|
memcpy(&pperr->perr_dests[j], &perr->perr_dests[i],
|
|
sizeof(*perr->perr_dests));
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
switch(PERR_DFLAGS(i)) {
|
|
case (IEEE80211_REASON_MESH_PERR_NO_FI):
|
|
if (PERR_DSEQ(i) == 0) {
|
|
hr->hr_seq++;
|
|
if (forward) {
|
|
pperr->perr_dests[j].dest_seq =
|
|
hr->hr_seq;
|
|
}
|
|
} else {
|
|
hr->hr_seq = PERR_DSEQ(i);
|
|
}
|
|
rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
|
|
j++;
|
|
break;
|
|
case (IEEE80211_REASON_MESH_PERR_DEST_UNREACH):
|
|
if(HWMP_SEQ_GT(PERR_DSEQ(i), hr->hr_seq)) {
|
|
hr->hr_seq = PERR_DSEQ(i);
|
|
rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
|
|
j++;
|
|
}
|
|
break;
|
|
case (IEEE80211_REASON_MESH_PERR_NO_PROXY):
|
|
rt_ext = ieee80211_mesh_rt_find(vap, PERR_DEXTADDR(i));
|
|
if (rt_ext != NULL) {
|
|
rt_ext->rt_flags &=
|
|
~IEEE80211_MESHRT_FLAGS_VALID;
|
|
j++;
|
|
}
|
|
break;
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL,
|
|
"PERR, unknown reason code %u\n", PERR_DFLAGS(i));
|
|
goto done; /* XXX: stats?? */
|
|
}
|
|
ieee80211_mesh_rt_flush_peer(vap, PERR_DADDR(i));
|
|
KASSERT(j < 32, ("PERR, error ndest >= 32 (%u)", j));
|
|
}
|
|
if (j == 0) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, "%s",
|
|
"PERR not accepted");
|
|
goto done; /* XXX: stats?? */
|
|
}
|
|
|
|
/*
|
|
* Propagate the PERR if we previously found it on our routing table.
|
|
*/
|
|
if (forward && perr->perr_ttl > 1) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni,
|
|
"propagate PERR from %6D", wh->i_addr2, ":");
|
|
pperr->perr_ndests = j;
|
|
pperr->perr_ttl--;
|
|
hwmp_send_perr(vap, broadcastaddr, pperr);
|
|
}
|
|
done:
|
|
if (pperr != NULL)
|
|
IEEE80211_FREE(pperr, M_80211_MESH_PERR);
|
|
}
|
|
#undef PERR_DFLAGS
|
|
#undef PERR_DADDR
|
|
#undef PERR_DSEQ
|
|
#undef PERR_DEXTADDR
|
|
|
|
static int
|
|
hwmp_send_perr(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
struct ieee80211_meshperr_ie *perr)
|
|
{
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
int i;
|
|
uint8_t length = 0;
|
|
|
|
/*
|
|
* Enforce PERR interval.
|
|
*/
|
|
if (ratecheck(&hs->hs_lastperr, &ieee80211_hwmp_perrminint) == 0)
|
|
return EALREADY;
|
|
getmicrouptime(&hs->hs_lastperr);
|
|
|
|
/*
|
|
* mesh perr action frame format
|
|
* [6] da
|
|
* [6] sa
|
|
* [6] addr3 = sa
|
|
* [1] action
|
|
* [1] category
|
|
* [tlv] mesh path error
|
|
*/
|
|
perr->perr_ie = IEEE80211_ELEMID_MESHPERR;
|
|
length = IEEE80211_MESHPERR_BASE_SZ;
|
|
for (i = 0; i<perr->perr_ndests; i++) {
|
|
if (perr->perr_dests[i].dest_flags &
|
|
IEEE80211_MESHPERR_FLAGS_AE) {
|
|
length += IEEE80211_MESHPERR_DEST_SZ_AE;
|
|
continue ;
|
|
}
|
|
length += IEEE80211_MESHPERR_DEST_SZ;
|
|
}
|
|
perr->perr_len =length;
|
|
return hwmp_send_action(vap, da, (uint8_t *)perr, perr->perr_len+2);
|
|
}
|
|
|
|
/*
|
|
* Called from the rest of the net80211 code (mesh code for example).
|
|
* NB: IEEE80211_REASON_MESH_PERR_DEST_UNREACH can be trigger by the fact that
|
|
* a mesh STA is unable to forward an MSDU/MMPDU to a next-hop mesh STA.
|
|
*/
|
|
#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags
|
|
#define PERR_DADDR(n) perr.perr_dests[n].dest_addr
|
|
#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq
|
|
#define PERR_DEXTADDR(n) perr.perr_dests[n].dest_ext_addr
|
|
#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode
|
|
static void
|
|
hwmp_senderror(struct ieee80211vap *vap,
|
|
const uint8_t addr[IEEE80211_ADDR_LEN],
|
|
struct ieee80211_mesh_route *rt, int rcode)
|
|
{
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_hwmp_route *hr = NULL;
|
|
struct ieee80211_meshperr_ie perr;
|
|
|
|
if (rt != NULL)
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt,
|
|
struct ieee80211_hwmp_route);
|
|
|
|
perr.perr_ndests = 1;
|
|
perr.perr_ttl = ms->ms_ttl;
|
|
PERR_DFLAGS(0) = 0;
|
|
PERR_DRCODE(0) = rcode;
|
|
|
|
switch (rcode) {
|
|
case IEEE80211_REASON_MESH_PERR_NO_FI:
|
|
IEEE80211_ADDR_COPY(PERR_DADDR(0), addr);
|
|
PERR_DSEQ(0) = 0; /* reserved */
|
|
break;
|
|
case IEEE80211_REASON_MESH_PERR_NO_PROXY:
|
|
KASSERT(rt != NULL, ("no proxy info for sending PERR"));
|
|
KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
|
|
("route is not marked proxy"));
|
|
PERR_DFLAGS(0) |= IEEE80211_MESHPERR_FLAGS_AE;
|
|
IEEE80211_ADDR_COPY(PERR_DADDR(0), vap->iv_myaddr);
|
|
PERR_DSEQ(0) = rt->rt_ext_seq;
|
|
IEEE80211_ADDR_COPY(PERR_DEXTADDR(0), addr);
|
|
break;
|
|
case IEEE80211_REASON_MESH_PERR_DEST_UNREACH:
|
|
KASSERT(rt != NULL, ("no route info for sending PERR"));
|
|
IEEE80211_ADDR_COPY(PERR_DADDR(0), addr);
|
|
PERR_DSEQ(0) = hr->hr_seq;
|
|
break;
|
|
default:
|
|
KASSERT(0, ("unknown reason code for HWMP PERR (%u)", rcode));
|
|
}
|
|
hwmp_send_perr(vap, broadcastaddr, &perr);
|
|
}
|
|
#undef PERR_DFLAGS
|
|
#undef PEER_DADDR
|
|
#undef PERR_DSEQ
|
|
#undef PERR_DEXTADDR
|
|
#undef PERR_DRCODE
|
|
|
|
static void
|
|
hwmp_recv_rann(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh, const struct ieee80211_meshrann_ie *rann)
|
|
{
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_route *rt = NULL;
|
|
struct ieee80211_hwmp_route *hr;
|
|
struct ieee80211_meshpreq_ie preq;
|
|
struct ieee80211_meshrann_ie prann;
|
|
|
|
if (IEEE80211_ADDR_EQ(rann->rann_addr, vap->iv_myaddr))
|
|
return;
|
|
|
|
rt = ieee80211_mesh_rt_find(vap, rann->rann_addr);
|
|
if (rt != NULL && rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
|
|
/* Acceptance criteria: if RANN.seq < stored seq, discard RANN */
|
|
if (HWMP_SEQ_LT(rann->rann_seq, hr->hr_seq)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL,
|
|
"RANN seq %u < %u", rann->rann_seq, hr->hr_seq);
|
|
return;
|
|
}
|
|
|
|
/* Acceptance criteria: if RANN.seq == stored seq AND
|
|
* RANN.metric > stored metric, discard RANN */
|
|
if (HWMP_SEQ_EQ(rann->rann_seq, hr->hr_seq) &&
|
|
rann->rann_metric > rt->rt_metric) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL,
|
|
"RANN metric %u > %u", rann->rann_metric, rt->rt_metric);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* RANN ACCEPTED */
|
|
|
|
ieee80211_hwmp_rannint = rann->rann_interval; /* XXX: mtx lock? */
|
|
|
|
if (rt == NULL) {
|
|
rt = ieee80211_mesh_rt_add(vap, rann->rann_addr);
|
|
if (rt == NULL) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL,
|
|
"unable to add mac for RANN root %6D",
|
|
rann->rann_addr, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
return;
|
|
}
|
|
}
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
/* Check if root is a mesh gate, mark it */
|
|
if (rann->rann_flags & IEEE80211_MESHRANN_FLAGS_GATE) {
|
|
struct ieee80211_mesh_gate_route *gr;
|
|
|
|
rt->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
|
|
gr = ieee80211_mesh_mark_gate(vap, rann->rann_addr,
|
|
rt);
|
|
gr->gr_lastseq = 0; /* NOT GANN */
|
|
}
|
|
/* discovery timeout */
|
|
ieee80211_mesh_rt_update(rt,
|
|
ticks_to_msecs(ieee80211_hwmp_roottimeout));
|
|
|
|
preq.preq_flags = IEEE80211_MESHPREQ_FLAGS_AM;
|
|
preq.preq_hopcount = 0;
|
|
preq.preq_ttl = ms->ms_ttl;
|
|
preq.preq_id = 0; /* reserved */
|
|
IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr);
|
|
preq.preq_origseq = ++hs->hs_seq;
|
|
preq.preq_lifetime = ieee80211_hwmp_roottimeout;
|
|
preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
preq.preq_tcount = 1;
|
|
preq.preq_targets[0].target_flags = IEEE80211_MESHPREQ_TFLAGS_TO;
|
|
/* NB: IEEE80211_MESHPREQ_TFLAGS_USN = 0 implicitly implied */
|
|
IEEE80211_ADDR_COPY(preq.preq_targets[0].target_addr, rann->rann_addr);
|
|
preq.preq_targets[0].target_seq = rann->rann_seq;
|
|
/* XXX: if rootconfint have not passed, we built this preq in vain */
|
|
hwmp_send_preq(vap, wh->i_addr2, &preq, &hr->hr_lastrootconf,
|
|
&ieee80211_hwmp_rootconfint);
|
|
|
|
/* propagate a RANN */
|
|
if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID &&
|
|
rann->rann_ttl > 1 &&
|
|
ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
|
|
hr->hr_seq = rann->rann_seq;
|
|
memcpy(&prann, rann, sizeof(prann));
|
|
prann.rann_hopcount += 1;
|
|
prann.rann_ttl -= 1;
|
|
prann.rann_metric += ms->ms_pmetric->mpm_metric(ni);
|
|
hwmp_send_rann(vap, broadcastaddr, &prann);
|
|
}
|
|
}
|
|
|
|
static int
|
|
hwmp_send_rann(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
struct ieee80211_meshrann_ie *rann)
|
|
{
|
|
/*
|
|
* mesh rann action frame format
|
|
* [6] da
|
|
* [6] sa
|
|
* [6] addr3 = sa
|
|
* [1] action
|
|
* [1] category
|
|
* [tlv] root announcement
|
|
*/
|
|
rann->rann_ie = IEEE80211_ELEMID_MESHRANN;
|
|
rann->rann_len = IEEE80211_MESHRANN_BASE_SZ;
|
|
return hwmp_send_action(vap, da, (uint8_t *)rann, rann->rann_len + 2);
|
|
}
|
|
|
|
#define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags
|
|
#define PREQ_TADDR(n) preq.preq_targets[n].target_addr
|
|
#define PREQ_TSEQ(n) preq.preq_targets[n].target_seq
|
|
static void
|
|
hwmp_rediscover_cb(void *arg)
|
|
{
|
|
struct ieee80211_mesh_route *rt = arg;
|
|
struct ieee80211vap *vap = rt->rt_vap;
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_hwmp_route *hr;
|
|
struct ieee80211_meshpreq_ie preq; /* Optimize: storing first preq? */
|
|
|
|
if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID))
|
|
return ; /* nothing to do */
|
|
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route);
|
|
if (hr->hr_preqretries >=
|
|
ieee80211_hwmp_maxpreq_retries) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY,
|
|
rt->rt_dest, "%s",
|
|
"max number of discovery, send queued frames to GATE");
|
|
ieee80211_mesh_forward_to_gates(vap, rt);
|
|
vap->iv_stats.is_mesh_fwd_nopath++;
|
|
return ; /* XXX: flush queue? */
|
|
}
|
|
|
|
hr->hr_preqretries++;
|
|
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt->rt_dest,
|
|
"start path rediscovery , target seq %u", hr->hr_seq);
|
|
/*
|
|
* Try to discover the path for this node.
|
|
* Group addressed PREQ Case A
|
|
*/
|
|
preq.preq_flags = 0;
|
|
preq.preq_hopcount = 0;
|
|
preq.preq_ttl = ms->ms_ttl;
|
|
preq.preq_id = ++hs->hs_preqid;
|
|
IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr);
|
|
preq.preq_origseq = hr->hr_origseq;
|
|
preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_pathtimeout);
|
|
preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
preq.preq_tcount = 1;
|
|
IEEE80211_ADDR_COPY(PREQ_TADDR(0), rt->rt_dest);
|
|
PREQ_TFLAGS(0) = 0;
|
|
if (ieee80211_hwmp_targetonly)
|
|
PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO;
|
|
PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN;
|
|
PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */
|
|
/* XXX check return value */
|
|
hwmp_send_preq(vap, broadcastaddr, &preq, &hr->hr_lastpreq,
|
|
&ieee80211_hwmp_preqminint);
|
|
callout_reset(&rt->rt_discovery,
|
|
ieee80211_hwmp_net_diameter_traversaltime * 2,
|
|
hwmp_rediscover_cb, rt);
|
|
}
|
|
|
|
static struct ieee80211_node *
|
|
hwmp_discover(struct ieee80211vap *vap,
|
|
const uint8_t dest[IEEE80211_ADDR_LEN], struct mbuf *m)
|
|
{
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_mesh_route *rt = NULL;
|
|
struct ieee80211_hwmp_route *hr;
|
|
struct ieee80211_meshpreq_ie preq;
|
|
struct ieee80211_node *ni;
|
|
int sendpreq = 0;
|
|
|
|
KASSERT(vap->iv_opmode == IEEE80211_M_MBSS,
|
|
("not a mesh vap, opmode %d", vap->iv_opmode));
|
|
|
|
KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
|
|
("%s: discovering self!", __func__));
|
|
|
|
ni = NULL;
|
|
if (!IEEE80211_IS_MULTICAST(dest)) {
|
|
rt = ieee80211_mesh_rt_find(vap, dest);
|
|
if (rt == NULL) {
|
|
rt = ieee80211_mesh_rt_add(vap, dest);
|
|
if (rt == NULL) {
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_HWMP,
|
|
"unable to add discovery path to %6D",
|
|
dest, ":");
|
|
vap->iv_stats.is_mesh_rtaddfailed++;
|
|
goto done;
|
|
}
|
|
}
|
|
hr = IEEE80211_MESH_ROUTE_PRIV(rt,
|
|
struct ieee80211_hwmp_route);
|
|
if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest,
|
|
"%s", "already discovering queue frame until path found");
|
|
sendpreq = 1;
|
|
goto done;
|
|
}
|
|
if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
|
|
if (hr->hr_lastdiscovery != 0 &&
|
|
(ticks - hr->hr_lastdiscovery <
|
|
(ieee80211_hwmp_net_diameter_traversaltime * 2))) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
dest, NULL, "%s",
|
|
"too frequent discovery requeust");
|
|
sendpreq = 1;
|
|
goto done;
|
|
}
|
|
hr->hr_lastdiscovery = ticks;
|
|
if (hr->hr_preqretries >=
|
|
ieee80211_hwmp_maxpreq_retries) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
dest, NULL, "%s",
|
|
"no valid path , max number of discovery");
|
|
vap->iv_stats.is_mesh_fwd_nopath++;
|
|
goto done;
|
|
}
|
|
rt->rt_flags = IEEE80211_MESHRT_FLAGS_DISCOVER;
|
|
hr->hr_preqretries++;
|
|
if (hr->hr_origseq == 0)
|
|
hr->hr_origseq = ++hs->hs_seq;
|
|
rt->rt_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
sendpreq = 1;
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest,
|
|
"start path discovery (src %s), target seq %u",
|
|
m == NULL ? "<none>" : ether_sprintf(
|
|
mtod(m, struct ether_header *)->ether_shost),
|
|
hr->hr_seq);
|
|
/*
|
|
* Try to discover the path for this node.
|
|
* Group addressed PREQ Case A
|
|
*/
|
|
preq.preq_flags = 0;
|
|
preq.preq_hopcount = 0;
|
|
preq.preq_ttl = ms->ms_ttl;
|
|
preq.preq_id = ++hs->hs_preqid;
|
|
IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr);
|
|
preq.preq_origseq = hr->hr_origseq;
|
|
preq.preq_lifetime =
|
|
ticks_to_msecs(ieee80211_hwmp_pathtimeout);
|
|
preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL;
|
|
preq.preq_tcount = 1;
|
|
IEEE80211_ADDR_COPY(PREQ_TADDR(0), dest);
|
|
PREQ_TFLAGS(0) = 0;
|
|
if (ieee80211_hwmp_targetonly)
|
|
PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO;
|
|
PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN;
|
|
PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */
|
|
/* XXX check return value */
|
|
hwmp_send_preq(vap, broadcastaddr, &preq,
|
|
&hr->hr_lastpreq, &ieee80211_hwmp_preqminint);
|
|
callout_reset(&rt->rt_discovery,
|
|
ieee80211_hwmp_net_diameter_traversaltime * 2,
|
|
hwmp_rediscover_cb, rt);
|
|
}
|
|
if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)
|
|
ni = ieee80211_find_txnode(vap, rt->rt_nexthop);
|
|
} else {
|
|
ni = ieee80211_find_txnode(vap, dest);
|
|
/* NB: if null then we leak mbuf */
|
|
KASSERT(ni != NULL, ("leak mcast frame"));
|
|
return ni;
|
|
}
|
|
done:
|
|
if (ni == NULL && m != NULL) {
|
|
if (sendpreq) {
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
/*
|
|
* Queue packet for transmit when path discovery
|
|
* completes. If discovery never completes the
|
|
* frame will be flushed by way of the aging timer.
|
|
*/
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest,
|
|
"%s", "queue frame until path found");
|
|
MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
|
|
m->m_pkthdr.rcvif = (void *)(uintptr_t)
|
|
ieee80211_mac_hash(ic, dest);
|
|
/* XXX age chosen randomly */
|
|
ieee80211_ageq_append(&ic->ic_stageq, m,
|
|
IEEE80211_INACT_WAIT);
|
|
} else {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP,
|
|
dest, NULL, "%s", "no valid path to this node");
|
|
m_freem(m);
|
|
}
|
|
}
|
|
return ni;
|
|
}
|
|
#undef PREQ_TFLAGS
|
|
#undef PREQ_TADDR
|
|
#undef PREQ_TSEQ
|
|
|
|
static int
|
|
hwmp_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
|
|
{
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
int error;
|
|
|
|
if (vap->iv_opmode != IEEE80211_M_MBSS)
|
|
return ENOSYS;
|
|
error = 0;
|
|
switch (ireq->i_type) {
|
|
case IEEE80211_IOC_HWMP_ROOTMODE:
|
|
ireq->i_val = hs->hs_rootmode;
|
|
break;
|
|
case IEEE80211_IOC_HWMP_MAXHOPS:
|
|
ireq->i_val = hs->hs_maxhops;
|
|
break;
|
|
default:
|
|
return ENOSYS;
|
|
}
|
|
return error;
|
|
}
|
|
IEEE80211_IOCTL_GET(hwmp, hwmp_ioctl_get80211);
|
|
|
|
static int
|
|
hwmp_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
|
|
{
|
|
struct ieee80211_hwmp_state *hs = vap->iv_hwmp;
|
|
int error;
|
|
|
|
if (vap->iv_opmode != IEEE80211_M_MBSS)
|
|
return ENOSYS;
|
|
error = 0;
|
|
switch (ireq->i_type) {
|
|
case IEEE80211_IOC_HWMP_ROOTMODE:
|
|
if (ireq->i_val < 0 || ireq->i_val > 3)
|
|
return EINVAL;
|
|
hs->hs_rootmode = ireq->i_val;
|
|
hwmp_rootmode_setup(vap);
|
|
break;
|
|
case IEEE80211_IOC_HWMP_MAXHOPS:
|
|
if (ireq->i_val <= 0 || ireq->i_val > 255)
|
|
return EINVAL;
|
|
hs->hs_maxhops = ireq->i_val;
|
|
break;
|
|
default:
|
|
return ENOSYS;
|
|
}
|
|
return error;
|
|
}
|
|
IEEE80211_IOCTL_SET(hwmp, hwmp_ioctl_set80211);
|