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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>
316 lines
10 KiB
C
316 lines
10 KiB
C
/*
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* net/tipc/netlink.c: TIPC configuration handling
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*
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* Copyright (c) 2005-2006, 2014, Ericsson AB
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* Copyright (c) 2005-2007, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "socket.h"
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#include "name_table.h"
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#include "bearer.h"
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#include "link.h"
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#include "node.h"
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#include "net.h"
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#include "udp_media.h"
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#include <net/genetlink.h>
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static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
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[TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
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[TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
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[TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
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[TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
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[TIPC_NLA_LINK] = { .type = NLA_NESTED, },
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[TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
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[TIPC_NLA_NODE] = { .type = NLA_NESTED, },
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[TIPC_NLA_NET] = { .type = NLA_NESTED, },
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[TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, },
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[TIPC_NLA_MON] = { .type = NLA_NESTED, },
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};
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const struct nla_policy
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tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
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[TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED }
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};
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const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
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[TIPC_NLA_MON_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_MON_REF] = { .type = NLA_U32 },
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[TIPC_NLA_MON_ACTIVATION_THRESHOLD] = { .type = NLA_U32 },
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};
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const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
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[TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 },
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[TIPC_NLA_SOCK_REF] = { .type = NLA_U32 },
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[TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED },
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[TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG }
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};
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const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
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[TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_NET_ID] = { .type = NLA_U32 },
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[TIPC_NLA_NET_ADDR] = { .type = NLA_U32 },
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[TIPC_NLA_NET_NODEID] = { .type = NLA_U64 },
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[TIPC_NLA_NET_NODEID_W1] = { .type = NLA_U64 },
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[TIPC_NLA_NET_ADDR_LEGACY] = { .type = NLA_FLAG }
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};
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const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
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[TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_LINK_NAME] = { .type = NLA_STRING,
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.len = TIPC_MAX_LINK_NAME },
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[TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
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[TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
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[TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
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[TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
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[TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
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[TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
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[TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
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[TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
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};
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const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
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[TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
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[TIPC_NLA_NODE_UP] = { .type = NLA_FLAG },
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[TIPC_NLA_NODE_ID] = { .type = NLA_BINARY,
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.len = TIPC_NODEID_LEN},
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[TIPC_NLA_NODE_KEY] = { .type = NLA_BINARY,
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.len = TIPC_AEAD_KEY_SIZE_MAX},
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[TIPC_NLA_NODE_KEY_MASTER] = { .type = NLA_FLAG },
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[TIPC_NLA_NODE_REKEYING] = { .type = NLA_U32 },
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};
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/* Properties valid for media, bearer and link */
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const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
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[TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
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[TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
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[TIPC_NLA_PROP_WIN] = { .type = NLA_U32 },
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[TIPC_NLA_PROP_MTU] = { .type = NLA_U32 },
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[TIPC_NLA_PROP_BROADCAST] = { .type = NLA_U32 },
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[TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
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};
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const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
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[TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_BEARER_NAME] = { .type = NLA_STRING,
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.len = TIPC_MAX_BEARER_NAME },
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[TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
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[TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
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};
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const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
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[TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
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[TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
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[TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
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};
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const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
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[TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
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[TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
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.len = sizeof(struct sockaddr_storage)},
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[TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
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.len = sizeof(struct sockaddr_storage)},
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};
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/* Users of the legacy API (tipc-config) can't handle that we add operations,
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* so we have a separate genl handling for the new API.
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*/
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static const struct genl_ops tipc_genl_v2_ops[] = {
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{
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.cmd = TIPC_NL_BEARER_DISABLE,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_bearer_disable,
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},
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{
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.cmd = TIPC_NL_BEARER_ENABLE,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_bearer_enable,
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},
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{
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.cmd = TIPC_NL_BEARER_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_bearer_get,
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.dumpit = tipc_nl_bearer_dump,
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},
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{
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.cmd = TIPC_NL_BEARER_ADD,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_bearer_add,
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},
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{
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.cmd = TIPC_NL_BEARER_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_bearer_set,
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},
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{
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.cmd = TIPC_NL_SOCK_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.start = tipc_dump_start,
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.dumpit = tipc_nl_sk_dump,
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.done = tipc_dump_done,
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},
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{
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.cmd = TIPC_NL_PUBL_GET,
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.validate = GENL_DONT_VALIDATE_STRICT |
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GENL_DONT_VALIDATE_DUMP_STRICT,
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.dumpit = tipc_nl_publ_dump,
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},
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{
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.cmd = TIPC_NL_LINK_GET,
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.validate = GENL_DONT_VALIDATE_STRICT,
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.doit = tipc_nl_node_get_link,
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.dumpit = tipc_nl_node_dump_link,
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},
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{
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.cmd = TIPC_NL_LINK_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_set_link,
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},
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{
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.cmd = TIPC_NL_LINK_RESET_STATS,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_reset_link_stats,
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},
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{
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.cmd = TIPC_NL_MEDIA_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_media_get,
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.dumpit = tipc_nl_media_dump,
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},
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{
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.cmd = TIPC_NL_MEDIA_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_media_set,
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},
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{
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.cmd = TIPC_NL_NODE_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.dumpit = tipc_nl_node_dump,
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},
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{
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.cmd = TIPC_NL_NET_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.dumpit = tipc_nl_net_dump,
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},
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{
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.cmd = TIPC_NL_NET_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_net_set,
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},
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{
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.cmd = TIPC_NL_NAME_TABLE_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.dumpit = tipc_nl_name_table_dump,
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},
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{
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.cmd = TIPC_NL_MON_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_set_monitor,
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},
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{
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.cmd = TIPC_NL_MON_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_get_monitor,
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.dumpit = tipc_nl_node_dump_monitor,
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},
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{
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.cmd = TIPC_NL_MON_PEER_GET,
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.validate = GENL_DONT_VALIDATE_STRICT |
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GENL_DONT_VALIDATE_DUMP_STRICT,
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.dumpit = tipc_nl_node_dump_monitor_peer,
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},
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{
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.cmd = TIPC_NL_PEER_REMOVE,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_peer_rm,
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},
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#ifdef CONFIG_TIPC_MEDIA_UDP
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{
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.cmd = TIPC_NL_UDP_GET_REMOTEIP,
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.validate = GENL_DONT_VALIDATE_STRICT |
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GENL_DONT_VALIDATE_DUMP_STRICT,
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.dumpit = tipc_udp_nl_dump_remoteip,
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},
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#endif
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#ifdef CONFIG_TIPC_CRYPTO
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{
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.cmd = TIPC_NL_KEY_SET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_set_key,
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},
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{
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.cmd = TIPC_NL_KEY_FLUSH,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_node_flush_key,
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},
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#endif
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{
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.cmd = TIPC_NL_ADDR_LEGACY_GET,
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.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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.doit = tipc_nl_net_addr_legacy_get,
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},
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};
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struct genl_family tipc_genl_family __ro_after_init = {
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.name = TIPC_GENL_V2_NAME,
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.version = TIPC_GENL_V2_VERSION,
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.hdrsize = 0,
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.maxattr = TIPC_NLA_MAX,
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.policy = tipc_nl_policy,
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.netnsok = true,
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.module = THIS_MODULE,
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.ops = tipc_genl_v2_ops,
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.n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
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.resv_start_op = TIPC_NL_ADDR_LEGACY_GET + 1,
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};
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int __init tipc_netlink_start(void)
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{
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int res;
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res = genl_register_family(&tipc_genl_family);
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if (res) {
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pr_err("Failed to register netlink interface\n");
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return res;
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}
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return 0;
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}
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void tipc_netlink_stop(void)
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{
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genl_unregister_family(&tipc_genl_family);
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}
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