313 lines
12 KiB
C
313 lines
12 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
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* All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_PROTO_H_
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#define _NET80211_IEEE80211_PROTO_H_
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/*
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* 802.11 protocol implementation definitions.
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*/
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enum ieee80211_state {
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IEEE80211_S_INIT = 0, /* default state */
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IEEE80211_S_SCAN = 1, /* scanning */
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IEEE80211_S_AUTH = 2, /* try to authenticate */
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IEEE80211_S_ASSOC = 3, /* try to assoc */
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IEEE80211_S_CAC = 4, /* doing channel availability check */
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IEEE80211_S_RUN = 5, /* operational (e.g. associated) */
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IEEE80211_S_CSA = 6, /* channel switch announce pending */
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IEEE80211_S_SLEEP = 7, /* power save */
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};
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#define IEEE80211_S_MAX (IEEE80211_S_SLEEP+1)
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#define IEEE80211_SEND_MGMT(_ic,_ni,_type,_arg) \
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((*(_ic)->ic_send_mgmt)(_ic, _ni, _type, _arg))
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/*
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* The formation of some management frames requires guidance to
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* deal with legacy clients. When the client is identified as
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* "legacy 11b" this parameter can be passed in the arg param of a
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* IEEE80211_SEND_MGMT call.
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*/
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#define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */
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#define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */
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#define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */
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extern const char *ieee80211_mgt_subtype_name[];
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extern const char *ieee80211_phymode_name[];
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void ieee80211_proto_attach(struct ieee80211com *);
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void ieee80211_proto_detach(struct ieee80211com *);
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struct ieee80211_node;
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int ieee80211_input(struct ieee80211com *, struct mbuf *,
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struct ieee80211_node *, int, int, uint32_t);
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void ieee80211_deliver_data(struct ieee80211com *,
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struct ieee80211_node *, struct mbuf *);
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struct mbuf *ieee80211_decap1(struct mbuf *, int *);
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int ieee80211_setup_rates(struct ieee80211_node *ni,
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const uint8_t *rates, const uint8_t *xrates, int flags);
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void ieee80211_saveie(uint8_t **, const uint8_t *);
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void ieee80211_saveath(struct ieee80211_node *, uint8_t *);
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void ieee80211_recv_mgmt(struct ieee80211com *, struct mbuf *,
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struct ieee80211_node *, int, int, int, uint32_t);
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int ieee80211_mgmt_output(struct ieee80211com *, struct ieee80211_node *,
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struct mbuf *, int type);
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struct ieee80211_bpf_params;
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int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *,
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const struct ieee80211_bpf_params *);
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int ieee80211_output(struct ifnet *, struct mbuf *,
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struct sockaddr *, struct rtentry *);
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int ieee80211_send_nulldata(struct ieee80211_node *);
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int ieee80211_send_mgmt(struct ieee80211com *, struct ieee80211_node *,
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int, int);
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int ieee80211_send_probereq(struct ieee80211_node *ni,
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const uint8_t sa[IEEE80211_ADDR_LEN],
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const uint8_t da[IEEE80211_ADDR_LEN],
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const uint8_t bssid[IEEE80211_ADDR_LEN],
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const uint8_t *ssid, size_t ssidlen,
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const void *optie, size_t optielen);
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int ieee80211_classify(struct ieee80211com *, struct mbuf *,
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struct ieee80211_node *);
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struct mbuf *ieee80211_encap(struct ieee80211com *, struct mbuf *,
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struct ieee80211_node *);
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void ieee80211_reset_erp(struct ieee80211com *);
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void ieee80211_set_shortslottime(struct ieee80211com *, int onoff);
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int ieee80211_iserp_rateset(struct ieee80211com *,
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struct ieee80211_rateset *);
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void ieee80211_set11gbasicrates(struct ieee80211_rateset *,
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enum ieee80211_phymode);
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/*
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* Return the size of the 802.11 header for a management or data frame.
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*/
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static __inline int
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ieee80211_hdrsize(const void *data)
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{
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const struct ieee80211_frame *wh = data;
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int size = sizeof(struct ieee80211_frame);
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/* NB: we don't handle control frames */
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KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL,
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("%s: control frame", __func__));
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if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
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size += IEEE80211_ADDR_LEN;
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if (IEEE80211_QOS_HAS_SEQ(wh))
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size += sizeof(uint16_t);
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return size;
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}
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/*
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* Like ieee80211_hdrsize, but handles any type of frame.
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*/
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static __inline int
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ieee80211_anyhdrsize(const void *data)
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{
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const struct ieee80211_frame *wh = data;
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if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) {
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switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) {
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case IEEE80211_FC0_SUBTYPE_CTS:
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case IEEE80211_FC0_SUBTYPE_ACK:
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return sizeof(struct ieee80211_frame_ack);
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case IEEE80211_FC0_SUBTYPE_BAR:
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return sizeof(struct ieee80211_frame_bar);
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}
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return sizeof(struct ieee80211_frame_min);
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} else
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return ieee80211_hdrsize(data);
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}
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/*
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* Template for an in-kernel authenticator. Authenticators
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* register with the protocol code and are typically loaded
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* as separate modules as needed.
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*/
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struct ieee80211_authenticator {
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const char *ia_name; /* printable name */
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int (*ia_attach)(struct ieee80211com *);
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void (*ia_detach)(struct ieee80211com *);
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void (*ia_node_join)(struct ieee80211com *,
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struct ieee80211_node *);
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void (*ia_node_leave)(struct ieee80211com *,
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struct ieee80211_node *);
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};
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void ieee80211_authenticator_register(int type,
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const struct ieee80211_authenticator *);
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void ieee80211_authenticator_unregister(int type);
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const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth);
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struct ieee80211req;
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/*
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* Template for an MAC ACL policy module. Such modules
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* register with the protocol code and are passed the sender's
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* address of each received frame for validation.
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*/
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struct ieee80211_aclator {
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const char *iac_name; /* printable name */
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int (*iac_attach)(struct ieee80211com *);
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void (*iac_detach)(struct ieee80211com *);
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int (*iac_check)(struct ieee80211com *,
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const uint8_t mac[IEEE80211_ADDR_LEN]);
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int (*iac_add)(struct ieee80211com *,
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const uint8_t mac[IEEE80211_ADDR_LEN]);
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int (*iac_remove)(struct ieee80211com *,
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const uint8_t mac[IEEE80211_ADDR_LEN]);
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int (*iac_flush)(struct ieee80211com *);
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int (*iac_setpolicy)(struct ieee80211com *, int);
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int (*iac_getpolicy)(struct ieee80211com *);
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int (*iac_setioctl)(struct ieee80211com *, struct ieee80211req *);
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int (*iac_getioctl)(struct ieee80211com *, struct ieee80211req *);
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};
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void ieee80211_aclator_register(const struct ieee80211_aclator *);
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void ieee80211_aclator_unregister(const struct ieee80211_aclator *);
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const struct ieee80211_aclator *ieee80211_aclator_get(const char *name);
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/* flags for ieee80211_fix_rate() */
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#define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */
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#define IEEE80211_F_DOFRATE 0x00000002 /* use fixed rate */
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#define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */
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#define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */
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#define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */
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#define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */
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int ieee80211_fix_rate(struct ieee80211_node *,
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struct ieee80211_rateset *, int);
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/*
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* WME/WMM support.
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*/
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struct wmeParams {
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uint8_t wmep_acm;
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uint8_t wmep_aifsn;
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uint8_t wmep_logcwmin; /* log2(cwmin) */
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uint8_t wmep_logcwmax; /* log2(cwmax) */
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uint8_t wmep_txopLimit;
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uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */
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};
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#define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5)
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#define IEEE80211_US_TO_TXOP(_us) ((_us)>>5)
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struct chanAccParams {
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uint8_t cap_info; /* version of the current set */
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struct wmeParams cap_wmeParams[WME_NUM_AC];
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};
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struct ieee80211_wme_state {
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u_int wme_flags;
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#define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */
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u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */
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u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */
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u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */
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struct wmeParams wme_params[4]; /* from assoc resp for each AC*/
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struct chanAccParams wme_wmeChanParams; /* WME params applied to self */
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struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */
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struct chanAccParams wme_chanParams; /* params applied to self */
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struct chanAccParams wme_bssChanParams; /* params bcast to stations */
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int (*wme_update)(struct ieee80211com *);
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};
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void ieee80211_wme_initparams(struct ieee80211com *);
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void ieee80211_wme_updateparams(struct ieee80211com *);
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void ieee80211_wme_updateparams_locked(struct ieee80211com *);
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#define ieee80211_new_state(_ic, _nstate, _arg) \
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(((_ic)->ic_newstate)((_ic), (_nstate), (_arg)))
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int ieee80211_init(struct ieee80211com *, int forcescan);
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void ieee80211_dturbo_switch(struct ieee80211com *, int newflags);
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void ieee80211_beacon_miss(struct ieee80211com *);
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void ieee80211_print_essid(const uint8_t *, int);
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void ieee80211_dump_pkt(struct ieee80211com *,
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const uint8_t *, int, int, int);
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extern const char *ieee80211_opmode_name[];
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extern const char *ieee80211_state_name[IEEE80211_S_MAX];
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extern const char *ieee80211_wme_acnames[];
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/*
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* Beacon frames constructed by ieee80211_beacon_alloc
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* have the following structure filled in so drivers
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* can update the frame later w/ minimal overhead.
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*/
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struct ieee80211_beacon_offsets {
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uint8_t bo_flags[4]; /* update/state flags */
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uint16_t *bo_caps; /* capabilities */
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uint8_t *bo_cfp; /* start of CFParms element */
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uint8_t *bo_tim; /* start of atim/dtim */
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uint8_t *bo_wme; /* start of WME parameters */
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uint8_t *bo_tim_trailer;/* start of fixed-size trailer */
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uint16_t bo_tim_len; /* atim/dtim length in bytes */
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uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */
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uint8_t *bo_erp; /* start of ERP element */
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uint8_t *bo_htinfo; /* start of HT info element */
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uint8_t *bo_appie; /* start of AppIE element */
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uint16_t bo_appie_len; /* AppIE length in bytes */
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uint16_t bo_csa_trailer_len;;
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uint8_t *bo_csa; /* start of CSA element */
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};
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struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *,
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struct ieee80211_beacon_offsets *);
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/*
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* Beacon frame updates are signaled through calls to ic_update_beacon
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* with one of the IEEE80211_BEACON_* tokens defined below. For devices
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* that construct beacon frames on the host this can trigger a rebuild
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* or defer the processing. For devices that offload beacon frame
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* handling this callback can be used to signal a rebuild. The bo_flags
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* array in the ieee80211_beacon_offsets structure is intended to record
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* deferred processing requirements; ieee80211_beacon_update uses the
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* state to optimize work. Since this structure is owned by the driver
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* and not visible to the 802.11 layer drivers must supply an ic_update_beacon
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* callback that marks the flag bits and schedules (as necessary) an update.
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*/
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enum {
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IEEE80211_BEACON_CAPS = 0, /* capabilities */
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IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */
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IEEE80211_BEACON_WME = 2,
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IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */
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IEEE80211_BEACON_HTINFO = 4, /* HT Information */
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IEEE80211_BEACON_APPIE = 5, /* Application IE's */
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IEEE80211_BEACON_CFP = 6, /* CFParms */
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IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */
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};
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int ieee80211_beacon_update(struct ieee80211_node *,
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struct ieee80211_beacon_offsets *, struct mbuf *, int mcast);
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/*
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* Notification methods called from the 802.11 state machine.
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* Note that while these are defined here, their implementation
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* is OS-specific.
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*/
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void ieee80211_notify_node_join(struct ieee80211com *,
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struct ieee80211_node *, int newassoc);
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void ieee80211_notify_node_leave(struct ieee80211com *,
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struct ieee80211_node *);
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void ieee80211_notify_scan_done(struct ieee80211com *);
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#endif /* _NET80211_IEEE80211_PROTO_H_ */
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