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 if (genlmsg_end(msg, hdr) < 0) 67 goto out; 68 69 return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC); 70 out: 71 nlmsg_free(msg); 72 return -ENOBUFS; 73 } 74 75 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info, 76 int flags, u8 req) 77 { 78 void *hdr; 79 struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 80 81 if (!msg) 82 return NULL; 83 84 hdr = genlmsg_put_reply(msg, info, 85 &nl802154_family, flags, req); 86 if (!hdr) { 87 nlmsg_free(msg); 88 return NULL; 89 } 90 91 return msg; 92 } 93 94 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info) 95 { 96 struct nlmsghdr *nlh = nlmsg_hdr(msg); 97 void *hdr = genlmsg_data(nlmsg_data(nlh)); 98 99 if (genlmsg_end(msg, hdr) < 0) 100 goto out; 101 102 return genlmsg_reply(msg, info); 103 out: 104 nlmsg_free(msg); 105 return -ENOBUFS; 106 } 107 108 static const struct genl_ops ieee8021154_ops[] = { 109 /* see nl-phy.c */ 110 IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy, 111 ieee802154_dump_phy), 112 IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface), 113 IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface), 114 /* see nl-mac.c */ 115 IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req), 116 IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp), 117 IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req), 118 IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req), 119 IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req), 120 IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface, 121 ieee802154_dump_iface), 122 IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams), 123 IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams), 124 IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams), 125 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL, 126 ieee802154_llsec_dump_keys), 127 IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key), 128 IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key), 129 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL, 130 ieee802154_llsec_dump_devs), 131 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev), 132 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev), 133 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL, 134 ieee802154_llsec_dump_devkeys), 135 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey), 136 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey), 137 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL, 138 ieee802154_llsec_dump_seclevels), 139 IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL, 140 ieee802154_llsec_add_seclevel), 141 IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL, 142 ieee802154_llsec_del_seclevel), 143 }; 144 145 static const struct genl_multicast_group ieee802154_mcgrps[] = { 146 [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, }, 147 [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, }, 148 }; 149 150 int __init ieee802154_nl_init(void) 151 { 152 return genl_register_family_with_ops_groups(&nl802154_family, 153 ieee8021154_ops, 154 ieee802154_mcgrps); 155 } 156 157 void ieee802154_nl_exit(void) 158 { 159 genl_unregister_family(&nl802154_family); 160 } 161