kernel/net/ieee802154/netlink.c

   1 /*
   2  * Netlink interface for IEEE 802.15.4 stack
   3  *
   4  * Copyright 2007, 2008 Siemens AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * Written by:
  16  * Sergey Lapin <slapin@ossfans.org>
  17  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  18  * Maxim Osipov <maxim.osipov@siemens.com>
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/gfp.h>
  23 #include <net/genetlink.h>
  24 #include <linux/nl802154.h>
  25
  26 #include "ieee802154.h"
  27
  28 static unsigned int ieee802154_seq_num;
  29 static DEFINE_SPINLOCK(ieee802154_seq_lock);
  30
  31 struct genl_family nl802154_family = {
  32         .id             = GENL_ID_GENERATE,
  33         .hdrsize        = 0,
  34         .name           = IEEE802154_NL_NAME,
  35         .version        = 1,
  36         .maxattr        = IEEE802154_ATTR_MAX,
  37 };
  38
  39 /* Requests to userspace */
  40 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
  41 {
  42         void *hdr;
  43         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
  44         unsigned long f;
  45
  46         if (!msg)
  47                 return NULL;
  48
  49         spin_lock_irqsave(&ieee802154_seq_lock, f);
  50         hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
  51                           &nl802154_family, flags, req);
  52         spin_unlock_irqrestore(&ieee802154_seq_lock, f);
  53         if (!hdr) {
  54                 nlmsg_free(msg);
  55                 return NULL;
  56         }
  57
  58         return msg;
  59 }
  60
  61 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
  62 {
  63         struct nlmsghdr *nlh = nlmsg_hdr(msg);
  64         void *hdr = genlmsg_data(nlmsg_data(nlh));
  65
  66         genlmsg_end(msg, hdr);
  67
  68         return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
  69 }
  70
  71 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
  72                                         int flags, u8 req)
  73 {
  74         void *hdr;
  75         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
  76
  77         if (!msg)
  78                 return NULL;
  79
  80         hdr = genlmsg_put_reply(msg, info,
  81                                 &nl802154_family, flags, req);
  82         if (!hdr) {
  83                 nlmsg_free(msg);
  84                 return NULL;
  85         }
  86
  87         return msg;
  88 }
  89
  90 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
  91 {
  92         struct nlmsghdr *nlh = nlmsg_hdr(msg);
  93         void *hdr = genlmsg_data(nlmsg_data(nlh));
  94
  95         genlmsg_end(msg, hdr);
  96
  97         return genlmsg_reply(msg, info);
  98 }
  99
 100 static const struct genl_ops ieee8021154_ops[] = {
 101         /* see nl-phy.c */
 102         IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
 103                         ieee802154_dump_phy),
 104         IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
 105         IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
 106         /* see nl-mac.c */
 107         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
 108         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
 109         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
 110         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
 111         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
 112         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
 113                         ieee802154_dump_iface),
 114         IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
 115         IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
 116         IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
 117         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
 118                         ieee802154_llsec_dump_keys),
 119         IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
 120         IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
 121         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
 122                         ieee802154_llsec_dump_devs),
 123         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
 124         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
 125         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
 126                         ieee802154_llsec_dump_devkeys),
 127         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
 128         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
 129         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
 130                         ieee802154_llsec_dump_seclevels),
 131         IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
 132                       ieee802154_llsec_add_seclevel),
 133         IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
 134                       ieee802154_llsec_del_seclevel),
 135 };
 136
 137 static const struct genl_multicast_group ieee802154_mcgrps[] = {
 138         [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
 139         [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
 140 };
 141
 142 int __init ieee802154_nl_init(void)
 143 {
 144         return genl_register_family_with_ops_groups(&nl802154_family,
 145                                                     ieee8021154_ops,
 146                                                     ieee802154_mcgrps);
 147 }
 148
 149 void ieee802154_nl_exit(void)
 150 {
 151         genl_unregister_family(&nl802154_family);
 152 }