/* * net/tipc/netlink.c: TIPC configuration handling * * Copyright (c) 2005-2006, 2014, Ericsson AB * Copyright (c) 2005-2007, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the names of the copyright holders nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "core.h" #include "config.h" #include "socket.h" #include "name_table.h" #include "bearer.h" #include "link.h" #include "node.h" #include "net.h" #include static int handle_cmd(struct sk_buff *skb, struct genl_info *info) { struct sk_buff *rep_buf; struct nlmsghdr *rep_nlh; struct nlmsghdr *req_nlh = info->nlhdr; struct tipc_genlmsghdr *req_userhdr = info->userhdr; int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); u16 cmd; if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN))) cmd = TIPC_CMD_NOT_NET_ADMIN; else cmd = req_userhdr->cmd; rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd, nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN, nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN), hdr_space); if (rep_buf) { skb_push(rep_buf, hdr_space); rep_nlh = nlmsg_hdr(rep_buf); memcpy(rep_nlh, req_nlh, hdr_space); rep_nlh->nlmsg_len = rep_buf->len; genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid); } return 0; } static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, }, [TIPC_NLA_BEARER] = { .type = NLA_NESTED, }, [TIPC_NLA_SOCK] = { .type = NLA_NESTED, }, [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }, [TIPC_NLA_LINK] = { .type = NLA_NESTED, }, [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, }, [TIPC_NLA_NODE] = { .type = NLA_NESTED, }, [TIPC_NLA_NET] = { .type = NLA_NESTED, }, [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, } }; /* Legacy ASCII API */ static struct genl_family tipc_genl_family = { .id = GENL_ID_GENERATE, .name = TIPC_GENL_NAME, .version = TIPC_GENL_VERSION, .hdrsize = TIPC_GENL_HDRLEN, .maxattr = 0, }; /* Legacy ASCII API */ static struct genl_ops tipc_genl_ops[] = { { .cmd = TIPC_GENL_CMD, .doit = handle_cmd, }, }; /* Users of the legacy API (tipc-config) can't handle that we add operations, * so we have a separate genl handling for the new API. */ struct genl_family tipc_genl_v2_family = { .id = GENL_ID_GENERATE, .name = TIPC_GENL_V2_NAME, .version = TIPC_GENL_V2_VERSION, .hdrsize = 0, .maxattr = TIPC_NLA_MAX, }; static const struct genl_ops tipc_genl_v2_ops[] = { { .cmd = TIPC_NL_BEARER_DISABLE, .doit = tipc_nl_bearer_disable, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_BEARER_ENABLE, .doit = tipc_nl_bearer_enable, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_BEARER_GET, .doit = tipc_nl_bearer_get, .dumpit = tipc_nl_bearer_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_BEARER_SET, .doit = tipc_nl_bearer_set, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_SOCK_GET, .dumpit = tipc_nl_sk_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_PUBL_GET, .dumpit = tipc_nl_publ_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_LINK_GET, .doit = tipc_nl_link_get, .dumpit = tipc_nl_link_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_LINK_SET, .doit = tipc_nl_link_set, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_LINK_RESET_STATS, .doit = tipc_nl_link_reset_stats, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_MEDIA_GET, .doit = tipc_nl_media_get, .dumpit = tipc_nl_media_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_MEDIA_SET, .doit = tipc_nl_media_set, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_NODE_GET, .dumpit = tipc_nl_node_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_NET_GET, .dumpit = tipc_nl_net_dump, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_NET_SET, .doit = tipc_nl_net_set, .policy = tipc_nl_policy, }, { .cmd = TIPC_NL_NAME_TABLE_GET, .dumpit = tipc_nl_name_table_dump, .policy = tipc_nl_policy, } }; int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) { u32 maxattr = tipc_genl_v2_family.maxattr; *attr = tipc_genl_v2_family.attrbuf; if (!*attr) return -EOPNOTSUPP; return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy); } int tipc_netlink_start(void) { int res; res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops); if (res) { pr_err("Failed to register legacy interface\n"); return res; } res = genl_register_family_with_ops(&tipc_genl_v2_family, tipc_genl_v2_ops); if (res) { pr_err("Failed to register netlink interface\n"); return res; } return 0; } void tipc_netlink_stop(void) { genl_unregister_family(&tipc_genl_family); genl_unregister_family(&tipc_genl_v2_family); }