mirror of
https://github.com/torvalds/linux
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9c5d03d362
We had historically not checked that genlmsghdr.reserved is 0 on input which prevents us from using those precious bytes in the future. One use case would be to extend the cmd field, which is currently just 8 bits wide and 256 is not a lot of commands for some core families. To make sure that new families do the right thing by default put the onus of opting out of validation on existing families. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Paul Moore <paul@paul-moore.com> (NetLabel) Signed-off-by: David S. Miller <davem@davemloft.net>
149 lines
4.3 KiB
C
149 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Netlink interface for IEEE 802.15.4 stack
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*
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* Copyright 2007, 2008 Siemens AG
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*
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* Written by:
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* Sergey Lapin <slapin@ossfans.org>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Maxim Osipov <maxim.osipov@siemens.com>
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*/
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <net/genetlink.h>
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#include <linux/nl802154.h>
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#include "ieee802154.h"
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static unsigned int ieee802154_seq_num;
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static DEFINE_SPINLOCK(ieee802154_seq_lock);
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/* Requests to userspace */
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struct sk_buff *ieee802154_nl_create(int flags, u8 req)
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{
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void *hdr;
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struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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unsigned long f;
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if (!msg)
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return NULL;
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spin_lock_irqsave(&ieee802154_seq_lock, f);
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hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
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&nl802154_family, flags, req);
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spin_unlock_irqrestore(&ieee802154_seq_lock, f);
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if (!hdr) {
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nlmsg_free(msg);
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return NULL;
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}
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return msg;
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}
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int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
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{
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struct nlmsghdr *nlh = nlmsg_hdr(msg);
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void *hdr = genlmsg_data(nlmsg_data(nlh));
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genlmsg_end(msg, hdr);
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return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
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}
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struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
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int flags, u8 req)
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{
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void *hdr;
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struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!msg)
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return NULL;
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hdr = genlmsg_put_reply(msg, info,
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&nl802154_family, flags, req);
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if (!hdr) {
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nlmsg_free(msg);
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return NULL;
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}
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return msg;
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}
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int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
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{
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struct nlmsghdr *nlh = nlmsg_hdr(msg);
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void *hdr = genlmsg_data(nlmsg_data(nlh));
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genlmsg_end(msg, hdr);
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return genlmsg_reply(msg, info);
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}
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static const struct genl_small_ops ieee802154_ops[] = {
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/* see nl-phy.c */
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IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
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ieee802154_dump_phy),
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IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
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IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
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/* see nl-mac.c */
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IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
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IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
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IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
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IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
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IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
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IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
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ieee802154_dump_iface),
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IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
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IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
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IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
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IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
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ieee802154_llsec_dump_keys),
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IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
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IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
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IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
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ieee802154_llsec_dump_devs),
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IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
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IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
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IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
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ieee802154_llsec_dump_devkeys),
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IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
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IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
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IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
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ieee802154_llsec_dump_seclevels),
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IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
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ieee802154_llsec_add_seclevel),
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IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
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ieee802154_llsec_del_seclevel),
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};
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static const struct genl_multicast_group ieee802154_mcgrps[] = {
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[IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
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[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
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};
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struct genl_family nl802154_family __ro_after_init = {
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.hdrsize = 0,
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.name = IEEE802154_NL_NAME,
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.version = 1,
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.maxattr = IEEE802154_ATTR_MAX,
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.policy = ieee802154_policy,
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.module = THIS_MODULE,
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.small_ops = ieee802154_ops,
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.n_small_ops = ARRAY_SIZE(ieee802154_ops),
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.resv_start_op = IEEE802154_LLSEC_DEL_SECLEVEL + 1,
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.mcgrps = ieee802154_mcgrps,
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.n_mcgrps = ARRAY_SIZE(ieee802154_mcgrps),
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};
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int __init ieee802154_nl_init(void)
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{
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return genl_register_family(&nl802154_family);
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}
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void ieee802154_nl_exit(void)
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{
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genl_unregister_family(&nl802154_family);
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}
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