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56aa091d60
Check for NULL before calling the following operations from "struct ieee802154_mlme_ops": assoc_req, assoc_resp, disassoc_req, start_req, and scan_req. This fixes a current oops where those functions are called but not implemented. It also updates the documentation to clarify that they are now optional by design. If a call to an unimplemented function is attempted, the kernel returns EOPNOTSUPP via netlink. The following operations are still required: get_phy, get_pan_id, get_short_addr, and get_dsn. Note that the places where this patch changes the initialization of "ret" should not affect the rest of the code since "ret" was always set (again) before returning its value. Signed-off-by: Werner Almesberger <werner@almesberger.net> Signed-off-by: David S. Miller <davem@davemloft.net>
142 lines
3.9 KiB
C
142 lines
3.9 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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/*
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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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struct ieee802154_addr sa;
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struct ieee802154_addr da;
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u8 flags;
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u8 seq;
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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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#define MAC_CB_FLAG_INTRAPAN (1 << 5)
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static inline int 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 int 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_is_intrapan(struct sk_buff *skb)
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{
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return mac_cb(skb)->flags & MAC_CB_FLAG_INTRAPAN;
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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 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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u16 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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/* 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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u16 (*get_pan_id)(const struct net_device *dev);
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u16 (*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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