e462ded699
Commit 9b2777d608 (ieee802154: add TX power control to wpan_phy)
and following erroneously added CSMA and CCA parameters for 802.15.4
devices as PHY parameters, while they are actually MAC parameters and
can differ for any two WPAN instances. Since it is now sensible to have
multiple WPAN devices with differing CSMA/CCA parameters, make these
parameters MAC parameters instead.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
311 lines
7.7 KiB
C
311 lines
7.7 KiB
C
/*
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* An interface between IEEE802.15.4 device and rest of the kernel.
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*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Maxim Osipov <maxim.osipov@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#ifndef IEEE802154_NETDEVICE_H
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#define IEEE802154_NETDEVICE_H
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#include <net/af_ieee802154.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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struct ieee802154_sechdr {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 level:3,
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key_id_mode:2,
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reserved:3;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 reserved:3,
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key_id_mode:2,
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level:3;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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u8 key_id;
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__le32 frame_counter;
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union {
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__le32 short_src;
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__le64 extended_src;
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};
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};
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struct ieee802154_addr {
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u8 mode;
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__le16 pan_id;
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union {
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__le16 short_addr;
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__le64 extended_addr;
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};
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};
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struct ieee802154_hdr_fc {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u16 type:3,
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security_enabled:1,
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frame_pending:1,
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ack_request:1,
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intra_pan:1,
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reserved:3,
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dest_addr_mode:2,
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version:2,
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source_addr_mode:2;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u16 reserved:1,
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intra_pan:1,
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ack_request:1,
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frame_pending:1,
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security_enabled:1,
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type:3,
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source_addr_mode:2,
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version:2,
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dest_addr_mode:2,
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reserved2:2;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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};
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struct ieee802154_hdr {
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struct ieee802154_hdr_fc fc;
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u8 seq;
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struct ieee802154_addr source;
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struct ieee802154_addr dest;
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struct ieee802154_sechdr sec;
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};
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/* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
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* the contents of hdr will be, and the actual value of those bits in
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* hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
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* version, if SECEN is set.
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*/
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int ieee802154_hdr_push(struct sk_buff *skb, const struct ieee802154_hdr *hdr);
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/* pulls the entire 802.15.4 header off of the skb, including the security
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* header, and performs pan id decompression
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*/
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int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
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/* parses the frame control, sequence number of address fields in a given skb
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* and stores them into hdr, performing pan id decompression and length checks
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* to be suitable for use in header_ops.parse
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*/
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int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
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struct ieee802154_hdr *hdr);
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static inline int ieee802154_hdr_length(struct sk_buff *skb)
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{
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struct ieee802154_hdr hdr;
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int len = ieee802154_hdr_pull(skb, &hdr);
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if (len > 0)
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skb_push(skb, len);
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return len;
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}
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static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
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const struct ieee802154_addr *a2)
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{
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if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
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return false;
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if ((a1->mode == IEEE802154_ADDR_LONG &&
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a1->extended_addr != a2->extended_addr) ||
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(a1->mode == IEEE802154_ADDR_SHORT &&
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a1->short_addr != a2->short_addr))
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return false;
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return true;
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}
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static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
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{
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u64 temp;
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memcpy(&temp, raw, IEEE802154_ADDR_LEN);
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return (__force __le64)swab64(temp);
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}
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static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
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{
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u64 temp = swab64((__force u64)addr);
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memcpy(raw, &temp, IEEE802154_ADDR_LEN);
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}
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static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
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const struct ieee802154_addr_sa *sa)
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{
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a->mode = sa->addr_type;
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a->pan_id = cpu_to_le16(sa->pan_id);
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switch (a->mode) {
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case IEEE802154_ADDR_SHORT:
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a->short_addr = cpu_to_le16(sa->short_addr);
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break;
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case IEEE802154_ADDR_LONG:
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a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
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break;
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}
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}
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static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
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const struct ieee802154_addr *a)
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{
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sa->addr_type = a->mode;
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sa->pan_id = le16_to_cpu(a->pan_id);
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switch (a->mode) {
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case IEEE802154_ADDR_SHORT:
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sa->short_addr = le16_to_cpu(a->short_addr);
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break;
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case IEEE802154_ADDR_LONG:
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ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
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break;
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}
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}
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/*
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* A control block of skb passed between the ARPHRD_IEEE802154 device
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* and other stack parts.
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*/
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struct ieee802154_mac_cb {
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u8 lqi;
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u8 flags;
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u8 seq;
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struct ieee802154_addr source;
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struct ieee802154_addr dest;
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};
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static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
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{
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return (struct ieee802154_mac_cb *)skb->cb;
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}
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#define MAC_CB_FLAG_TYPEMASK ((1 << 3) - 1)
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#define MAC_CB_FLAG_ACKREQ (1 << 3)
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#define MAC_CB_FLAG_SECEN (1 << 4)
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static inline bool mac_cb_is_ackreq(struct sk_buff *skb)
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{
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return mac_cb(skb)->flags & MAC_CB_FLAG_ACKREQ;
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}
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static inline bool mac_cb_is_secen(struct sk_buff *skb)
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{
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return mac_cb(skb)->flags & MAC_CB_FLAG_SECEN;
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}
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static inline int mac_cb_type(struct sk_buff *skb)
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{
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return mac_cb(skb)->flags & MAC_CB_FLAG_TYPEMASK;
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}
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#define IEEE802154_MAC_SCAN_ED 0
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#define IEEE802154_MAC_SCAN_ACTIVE 1
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#define IEEE802154_MAC_SCAN_PASSIVE 2
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#define IEEE802154_MAC_SCAN_ORPHAN 3
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struct ieee802154_mac_params {
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s8 transmit_power;
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u8 min_be;
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u8 max_be;
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u8 csma_retries;
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s8 frame_retries;
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bool lbt;
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u8 cca_mode;
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s32 cca_ed_level;
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};
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struct wpan_phy;
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/*
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* This should be located at net_device->ml_priv
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*
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* get_phy should increment the reference counting on returned phy.
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* Use wpan_wpy_put to put that reference.
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*/
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struct ieee802154_mlme_ops {
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/* The following fields are optional (can be NULL). */
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int (*assoc_req)(struct net_device *dev,
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struct ieee802154_addr *addr,
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u8 channel, u8 page, u8 cap);
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int (*assoc_resp)(struct net_device *dev,
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struct ieee802154_addr *addr,
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__le16 short_addr, u8 status);
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int (*disassoc_req)(struct net_device *dev,
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struct ieee802154_addr *addr,
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u8 reason);
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int (*start_req)(struct net_device *dev,
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struct ieee802154_addr *addr,
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u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
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u8 pan_coord, u8 blx, u8 coord_realign);
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int (*scan_req)(struct net_device *dev,
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u8 type, u32 channels, u8 page, u8 duration);
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int (*set_mac_params)(struct net_device *dev,
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const struct ieee802154_mac_params *params);
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void (*get_mac_params)(struct net_device *dev,
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struct ieee802154_mac_params *params);
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/* The fields below are required. */
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struct wpan_phy *(*get_phy)(const struct net_device *dev);
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/*
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* FIXME: these should become the part of PIB/MIB interface.
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* However we still don't have IB interface of any kind
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*/
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__le16 (*get_pan_id)(const struct net_device *dev);
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__le16 (*get_short_addr)(const struct net_device *dev);
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u8 (*get_dsn)(const struct net_device *dev);
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};
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/* The IEEE 802.15.4 standard defines 2 type of the devices:
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* - FFD - full functionality device
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* - RFD - reduce functionality device
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*
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* So 2 sets of mlme operations are needed
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*/
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struct ieee802154_reduced_mlme_ops {
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struct wpan_phy *(*get_phy)(const struct net_device *dev);
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};
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static inline struct ieee802154_mlme_ops *
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ieee802154_mlme_ops(const struct net_device *dev)
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{
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return dev->ml_priv;
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}
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static inline struct ieee802154_reduced_mlme_ops *
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ieee802154_reduced_mlme_ops(const struct net_device *dev)
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{
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return dev->ml_priv;
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}
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#endif
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