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         .hdrsize        = 0,
  33         .name           = IEEE802154_NL_NAME,
  34         .version        = 1,
  35         .maxattr        = IEEE802154_ATTR_MAX,
  36 };
  37
  38 /* Requests to userspace */
  39 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
  40 {
  41         void *hdr;
  42         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
  43         unsigned long f;
  44
  45         if (!msg)
  46                 return NULL;
  47
  48         spin_lock_irqsave(&ieee802154_seq_lock, f);
  49         hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
  50                           &nl802154_family, flags, req);
  51         spin_unlock_irqrestore(&ieee802154_seq_lock, f);
  52         if (!hdr) {
  53                 nlmsg_free(msg);
  54                 return NULL;
  55         }
  56
  57         return msg;
  58 }
  59
  60 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
  61 {
  62         struct nlmsghdr *nlh = nlmsg_hdr(msg);
  63         void *hdr = genlmsg_data(nlmsg_data(nlh));
  64
  65         genlmsg_end(msg, hdr);
  66
  67         return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
  68 }
  69
  70 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
  71                                         int flags, u8 req)
  72 {
  73         void *hdr;
  74         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
  75
  76         if (!msg)
  77                 return NULL;
  78
  79         hdr = genlmsg_put_reply(msg, info,
  80                                 &nl802154_family, flags, req);
  81         if (!hdr) {
  82                 nlmsg_free(msg);
  83                 return NULL;
  84         }
  85
  86         return msg;
  87 }
  88
  89 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
  90 {
  91         struct nlmsghdr *nlh = nlmsg_hdr(msg);
  92         void *hdr = genlmsg_data(nlmsg_data(nlh));
  93
  94         genlmsg_end(msg, hdr);
  95
  96         return genlmsg_reply(msg, info);
  97 }
  98
  99 static const struct genl_ops ieee8021154_ops[] = {
 100         /* see nl-phy.c */
 101         IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
 102                         ieee802154_dump_phy),
 103         IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
 104         IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
 105         /* see nl-mac.c */
 106         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
 107         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
 108         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
 109         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
 110         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
 111         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
 112                         ieee802154_dump_iface),
 113         IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
 114         IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
 115         IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
 116         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
 117                         ieee802154_llsec_dump_keys),
 118         IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
 119         IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
 120         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
 121                         ieee802154_llsec_dump_devs),
 122         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
 123         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
 124         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
 125                         ieee802154_llsec_dump_devkeys),
 126         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
 127         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
 128         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
 129                         ieee802154_llsec_dump_seclevels),
 130         IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
 131                       ieee802154_llsec_add_seclevel),
 132         IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
 133                       ieee802154_llsec_del_seclevel),
 134 };
 135
 136 static const struct genl_multicast_group ieee802154_mcgrps[] = {
 137         [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
 138         [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
 139 };
 140
 141 int __init ieee802154_nl_init(void)
 142 {
 143         return genl_register_family_with_ops_groups(&nl802154_family,
 144                                                     ieee8021154_ops,
 145                                                     ieee802154_mcgrps);
 146 }
 147
 148 void ieee802154_nl_exit(void)
 149 {
 150         genl_unregister_family(&nl802154_family);
 151 }