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 /* Requests to userspace */ 32 struct sk_buff *ieee802154_nl_create(int flags, u8 req) 33 { 34 void *hdr; 35 struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 36 unsigned long f; 37 38 if (!msg) 39 return NULL; 40 41 spin_lock_irqsave(&ieee802154_seq_lock, f); 42 hdr = genlmsg_put(msg, 0, ieee802154_seq_num++, 43 &nl802154_family, flags, req); 44 spin_unlock_irqrestore(&ieee802154_seq_lock, f); 45 if (!hdr) { 46 nlmsg_free(msg); 47 return NULL; 48 } 49 50 return msg; 51 } 52 53 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group) 54 { 55 struct nlmsghdr *nlh = nlmsg_hdr(msg); 56 void *hdr = genlmsg_data(nlmsg_data(nlh)); 57 58 genlmsg_end(msg, hdr); 59 60 return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC); 61 } 62 63 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info, 64 int flags, u8 req) 65 { 66 void *hdr; 67 struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 68 69 if (!msg) 70 return NULL; 71 72 hdr = genlmsg_put_reply(msg, info, 73 &nl802154_family, flags, req); 74 if (!hdr) { 75 nlmsg_free(msg); 76 return NULL; 77 } 78 79 return msg; 80 } 81 82 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info) 83 { 84 struct nlmsghdr *nlh = nlmsg_hdr(msg); 85 void *hdr = genlmsg_data(nlmsg_data(nlh)); 86 87 genlmsg_end(msg, hdr); 88 89 return genlmsg_reply(msg, info); 90 } 91 92 static const struct genl_ops ieee802154_ops[] = { 93 /* see nl-phy.c */ 94 IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy, 95 ieee802154_dump_phy), 96 IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface), 97 IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface), 98 /* see nl-mac.c */ 99 IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req), 100 IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp), 101 IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req), 102 IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req), 103 IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req), 104 IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface, 105 ieee802154_dump_iface), 106 IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams), 107 IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams), 108 IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams), 109 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL, 110 ieee802154_llsec_dump_keys), 111 IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key), 112 IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key), 113 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL, 114 ieee802154_llsec_dump_devs), 115 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev), 116 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev), 117 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL, 118 ieee802154_llsec_dump_devkeys), 119 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey), 120 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey), 121 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL, 122 ieee802154_llsec_dump_seclevels), 123 IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL, 124 ieee802154_llsec_add_seclevel), 125 IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL, 126 ieee802154_llsec_del_seclevel), 127 }; 128 129 static const struct genl_multicast_group ieee802154_mcgrps[] = { 130 [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, }, 131 [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, }, 132 }; 133 134 struct genl_family nl802154_family __ro_after_init = { 135 .hdrsize = 0, 136 .name = IEEE802154_NL_NAME, 137 .version = 1, 138 .maxattr = IEEE802154_ATTR_MAX, 139 .module = THIS_MODULE, 140 .ops = ieee802154_ops, 141 .n_ops = ARRAY_SIZE(ieee802154_ops), 142 .mcgrps = ieee802154_mcgrps, 143 .n_mcgrps = ARRAY_SIZE(ieee802154_mcgrps), 144 }; 145 146 int __init ieee802154_nl_init(void) 147 { 148 return genl_register_family(&nl802154_family); 149 } 150 151 void ieee802154_nl_exit(void) 152 { 153 genl_unregister_family(&nl802154_family); 154 } 155