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489 lines
10 KiB
489 lines
10 KiB
/*
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* lib/route/link/ipvti.c IPVTI Link Info
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* Copyright (c) 2014 Susant Sahani <susant@redhat.com>
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*/
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/**
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* @ingroup link
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* @defgroup ipvti IPVTI
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* ipvti link module
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*
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* @details
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* \b Link Type Name: "ipvti"
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*
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* @route_doc{link_ipvti, IPVTI Documentation}
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*
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* @{
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*/
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#include <netlink-private/netlink.h>
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#include <netlink/netlink.h>
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#include <netlink/attr.h>
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#include <netlink/utils.h>
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#include <netlink/object.h>
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#include <netlink/route/rtnl.h>
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#include <netlink/route/link/ipvti.h>
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#include <netlink-private/route/link/api.h>
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#include <linux/if_tunnel.h>
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#define IPVTI_ATTR_LINK (1 << 0)
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#define IPVTI_ATTR_IKEY (1 << 1)
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#define IPVTI_ATTR_OKEY (1 << 2)
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#define IPVTI_ATTR_LOCAL (1 << 3)
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#define IPVTI_ATTR_REMOTE (1 << 4)
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struct ipvti_info
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{
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uint32_t link;
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uint32_t ikey;
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uint32_t okey;
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uint32_t local;
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uint32_t remote;
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uint32_t ipvti_mask;
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};
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static struct nla_policy ipvti_policy[IFLA_VTI_MAX + 1] = {
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[IFLA_VTI_LINK] = { .type = NLA_U32 },
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[IFLA_VTI_IKEY] = { .type = NLA_U32 },
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[IFLA_VTI_OKEY] = { .type = NLA_U32 },
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[IFLA_VTI_LOCAL] = { .type = NLA_U32 },
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[IFLA_VTI_REMOTE] = { .type = NLA_U32 },
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};
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static int ipvti_alloc(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti;
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if (link->l_info)
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memset(link->l_info, 0, sizeof(*ipvti));
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else {
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ipvti = calloc(1, sizeof(*ipvti));
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if (!ipvti)
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return -NLE_NOMEM;
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link->l_info = ipvti;
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}
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return 0;
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}
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static int ipvti_parse(struct rtnl_link *link, struct nlattr *data,
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struct nlattr *xstats)
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{
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struct nlattr *tb[IFLA_VTI_MAX + 1];
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struct ipvti_info *ipvti;
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int err;
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NL_DBG(3, "Parsing IPVTI link info\n");
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err = nla_parse_nested(tb, IFLA_VTI_MAX, data, ipvti_policy);
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if (err < 0)
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goto errout;
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err = ipvti_alloc(link);
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if (err < 0)
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goto errout;
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ipvti = link->l_info;
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if (tb[IFLA_VTI_LINK]) {
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ipvti->link = nla_get_u32(tb[IFLA_VTI_LINK]);
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ipvti->ipvti_mask |= IPVTI_ATTR_LINK;
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}
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if (tb[IFLA_VTI_IKEY]) {
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ipvti->ikey = nla_get_u32(tb[IFLA_VTI_IKEY]);
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ipvti->ipvti_mask |= IPVTI_ATTR_IKEY;
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}
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if (tb[IFLA_VTI_OKEY]) {
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ipvti->okey = nla_get_u32(tb[IFLA_VTI_OKEY]);
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ipvti->ipvti_mask |= IPVTI_ATTR_OKEY;
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}
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if (tb[IFLA_VTI_LOCAL]) {
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ipvti->local = nla_get_u32(tb[IFLA_VTI_LOCAL]);
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ipvti->ipvti_mask |= IPVTI_ATTR_LOCAL;
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}
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if (tb[IFLA_VTI_REMOTE]) {
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ipvti->remote = nla_get_u32(tb[IFLA_VTI_REMOTE]);
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ipvti->ipvti_mask |= IPVTI_ATTR_REMOTE;
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}
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err = 0;
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errout:
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return err;
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}
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static int ipvti_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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struct nlattr *data;
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data = nla_nest_start(msg, IFLA_INFO_DATA);
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if (!data)
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return -NLE_MSGSIZE;
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if (ipvti->ipvti_mask & IPVTI_ATTR_LINK)
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NLA_PUT_U32(msg, IFLA_VTI_LINK, ipvti->link);
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if (ipvti->ipvti_mask & IPVTI_ATTR_IKEY)
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NLA_PUT_U32(msg, IFLA_VTI_IKEY, ipvti->ikey);
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if (ipvti->ipvti_mask & IFLA_VTI_IKEY)
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NLA_PUT_U32(msg, IFLA_VTI_OKEY, ipvti->okey);
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if (ipvti->ipvti_mask & IPVTI_ATTR_LOCAL)
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NLA_PUT_U32(msg, IFLA_VTI_LOCAL, ipvti->local);
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if (ipvti->ipvti_mask & IPVTI_ATTR_REMOTE)
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NLA_PUT_U32(msg, IFLA_VTI_REMOTE, ipvti->remote);
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nla_nest_end(msg, data);
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nla_put_failure:
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return 0;
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}
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static void ipvti_free(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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free(ipvti);
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link->l_info = NULL;
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}
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static void ipvti_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
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{
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nl_dump(p, "ipvti : %s", link->l_name);
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}
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static void ipvti_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
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{
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struct ipvti_info *ipvti = link->l_info;
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char *name, addr[INET_ADDRSTRLEN];
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struct rtnl_link *parent;
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if (ipvti->ipvti_mask & IPVTI_ATTR_LINK) {
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nl_dump(p, " link ");
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name = NULL;
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parent = link_lookup(link->ce_cache, ipvti->link);
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if (parent)
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name = rtnl_link_get_name(parent);
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if (name)
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nl_dump_line(p, "%s\n", name);
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else
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nl_dump_line(p, "%u\n", ipvti->link);
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}
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if (ipvti->ipvti_mask & IPVTI_ATTR_IKEY) {
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nl_dump(p, " ikey ");
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nl_dump_line(p, "%x\n",ipvti->ikey);
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}
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if (ipvti->ipvti_mask & IPVTI_ATTR_OKEY) {
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nl_dump(p, " okey ");
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nl_dump_line(p, "%x\n", ipvti->okey);
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}
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if (ipvti->ipvti_mask & IPVTI_ATTR_LOCAL) {
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nl_dump(p, " local ");
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if(inet_ntop(AF_INET, &ipvti->local, addr, sizeof(addr)))
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nl_dump_line(p, "%s\n", addr);
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else
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nl_dump_line(p, "%#x\n", ntohs(ipvti->local));
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}
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if (ipvti->ipvti_mask & IPVTI_ATTR_REMOTE) {
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nl_dump(p, " remote ");
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if(inet_ntop(AF_INET, &ipvti->remote, addr, sizeof(addr)))
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nl_dump_line(p, "%s\n", addr);
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else
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nl_dump_line(p, "%#x\n", ntohs(ipvti->remote));
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}
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}
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static int ipvti_clone(struct rtnl_link *dst, struct rtnl_link *src)
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{
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struct ipvti_info *ipvti_dst, *ipvti_src = src->l_info;
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int err;
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dst->l_info = NULL;
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err = rtnl_link_set_type(dst, "vti");
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if (err < 0)
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return err;
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ipvti_dst = dst->l_info;
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if (!ipvti_dst || !ipvti_src)
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BUG();
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memcpy(ipvti_dst, ipvti_src, sizeof(struct ipvti_info));
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return 0;
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}
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static struct rtnl_link_info_ops ipvti_info_ops = {
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.io_name = "vti",
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.io_alloc = ipvti_alloc,
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.io_parse = ipvti_parse,
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.io_dump = {
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[NL_DUMP_LINE] = ipvti_dump_line,
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[NL_DUMP_DETAILS] = ipvti_dump_details,
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},
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.io_clone = ipvti_clone,
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.io_put_attrs = ipvti_put_attrs,
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.io_free = ipvti_free,
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};
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#define IS_IPVTI_LINK_ASSERT(link) \
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if ((link)->l_info_ops != &ipvti_info_ops) { \
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APPBUG("Link is not a ipvti link. set type \vti\" first."); \
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return -NLE_OPNOTSUPP; \
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}
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struct rtnl_link *rtnl_link_ipvti_alloc(void)
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{
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struct rtnl_link *link;
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int err;
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link = rtnl_link_alloc();
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if (!link)
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return NULL;
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err = rtnl_link_set_type(link, "vti");
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if (err < 0) {
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rtnl_link_put(link);
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return NULL;
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}
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return link;
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}
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/**
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* Check if link is a IPVTI link
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* @arg link Link object
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*
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* @return True if link is a IPVTI link, otherwise 0 is returned.
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*/
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int rtnl_link_is_ipvti(struct rtnl_link *link)
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{
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return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "vti");
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}
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/**
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* Create a new ipvti tunnel device
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* @arg sock netlink socket
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* @arg name name of the tunnel deviceL
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*
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* Creates a new ipvti tunnel device in the kernel
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_add(struct nl_sock *sk, const char *name)
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{
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struct rtnl_link *link;
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int err;
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link = rtnl_link_ipvti_alloc();
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if (!link)
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return -NLE_NOMEM;
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if(name)
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rtnl_link_set_name(link, name);
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err = rtnl_link_add(sk, link, NLM_F_CREATE);
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rtnl_link_put(link);
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return err;
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}
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/**
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* Set IPVTI tunnel interface index
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* @arg link Link object
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* @arg index interface index
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*
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_set_link(struct rtnl_link *link, uint32_t index)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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ipvti->link = index;
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ipvti->ipvti_mask |= IPVTI_ATTR_LINK;
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return 0;
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}
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/**
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* Get IPVTI tunnel interface index
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* @arg link Link object
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*
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* @return interface index
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*/
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uint32_t rtnl_link_ipvti_get_link(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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return ipvti->link;
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}
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/**
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* Set IPVTI tunnel set ikey
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* @arg link Link object
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* @arg ikey gre ikey
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*
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_set_ikey(struct rtnl_link *link, uint32_t ikey)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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ipvti->ikey = ikey;
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ipvti->ipvti_mask |= IPVTI_ATTR_IKEY;
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return 0;
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}
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/**
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* Get IPVTI tunnel ikey
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* @arg link Link object
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*
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* @return ikey
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*/
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uint32_t rtnl_link_ipvti_get_ikey(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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return ipvti->ikey;
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}
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/**
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* Set IPVTI tunnel set okey
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* @arg link Link object
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* @arg okey gre okey
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*
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_set_okey(struct rtnl_link *link, uint32_t okey)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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ipvti->okey = okey;
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ipvti->ipvti_mask |= IPVTI_ATTR_OKEY;
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return 0;
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}
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/**
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* Get IPVTI tunnel okey
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* @arg link Link object
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*
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* @return okey value
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*/
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uint32_t rtnl_link_ipvti_get_okey(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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return ipvti->okey;
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}
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/**
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* Set IPVTI tunnel local address
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* @arg link Link object
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* @arg addr local address
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*
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_set_local(struct rtnl_link *link, uint32_t addr)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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ipvti->local = addr;
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ipvti->ipvti_mask |= IPVTI_ATTR_LOCAL;
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return 0;
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}
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/**
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* Get IPVTI tunnel local address
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* @arg link Link object
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*
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* @return local address
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*/
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uint32_t rtnl_link_ipvti_get_local(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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return ipvti->local;
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}
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/**
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* Set IPVTI tunnel remote address
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* @arg link Link object
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* @arg remote remote address
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*
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* @return 0 on success or a negative error code
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*/
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int rtnl_link_ipvti_set_remote(struct rtnl_link *link, uint32_t remote)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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ipvti->remote = remote;
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ipvti->ipvti_mask |= IPVTI_ATTR_REMOTE;
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return 0;
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}
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/**
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* Get IPVTI tunnel remote address
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* @arg link Link object
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*
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* @return remote address on success or a negative error code
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*/
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uint32_t rtnl_link_ipvti_get_remote(struct rtnl_link *link)
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{
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struct ipvti_info *ipvti = link->l_info;
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IS_IPVTI_LINK_ASSERT(link);
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return ipvti->remote;
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}
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static void __init ipvti_init(void)
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{
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rtnl_link_register_info(&ipvti_info_ops);
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}
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static void __exit ipvti_exit(void)
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{
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rtnl_link_unregister_info(&ipvti_info_ops);
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}
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