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824 lines
18 KiB
824 lines
18 KiB
/*
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* lib/route/link/sit.c SIT 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 sit SIT
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* sit link module
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*
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* @details
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* \b Link Type Name: "sit"
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*
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* @route_doc{link_sit, SIT 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/sit.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 SIT_ATTR_LINK (1 << 0)
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#define SIT_ATTR_LOCAL (1 << 1)
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#define SIT_ATTR_REMOTE (1 << 2)
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#define SIT_ATTR_TTL (1 << 3)
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#define SIT_ATTR_TOS (1 << 4)
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#define SIT_ATTR_PMTUDISC (1 << 5)
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#define SIT_ATTR_FLAGS (1 << 6)
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#define SIT_ATTR_PROTO (1 << 7)
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#define SIT_ATTR_6RD_PREFIX (1 << 8)
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#define SIT_ATTR_6RD_RELAY_PREFIX (1 << 9)
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#define SIT_ATTR_6RD_PREFIXLEN (1 << 10)
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#define SIT_ATTR_6RD_RELAY_PREFIXLEN (1 << 11)
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struct sit_info
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{
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uint8_t ttl;
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uint8_t tos;
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uint8_t pmtudisc;
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uint8_t proto;
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uint16_t flags;
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uint32_t link;
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uint32_t local;
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uint32_t remote;
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struct in6_addr ip6rd_prefix;
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uint32_t ip6rd_relay_prefix;
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uint16_t ip6rd_prefixlen;
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uint16_t ip6rd_relay_prefixlen;
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uint32_t sit_mask;
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};
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static struct nla_policy sit_policy[IFLA_IPTUN_MAX + 1] = {
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[IFLA_IPTUN_LINK] = { .type = NLA_U32 },
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[IFLA_IPTUN_LOCAL] = { .type = NLA_U32 },
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[IFLA_IPTUN_REMOTE] = { .type = NLA_U32 },
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[IFLA_IPTUN_TTL] = { .type = NLA_U8 },
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[IFLA_IPTUN_TOS] = { .type = NLA_U8 },
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[IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 },
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[IFLA_IPTUN_FLAGS] = { .type = NLA_U16 },
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[IFLA_IPTUN_PROTO] = { .type = NLA_U8 },
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[IFLA_IPTUN_6RD_PREFIX] = { .minlen = sizeof(struct in6_addr) },
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[IFLA_IPTUN_6RD_RELAY_PREFIX] = { .type = NLA_U32 },
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[IFLA_IPTUN_6RD_PREFIXLEN] = { .type = NLA_U16 },
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[IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 },
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};
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static int sit_alloc(struct rtnl_link *link)
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{
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struct sit_info *sit;
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if (link->l_info)
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memset(link->l_info, 0, sizeof(*sit));
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else {
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sit = calloc(1, sizeof(*sit));
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if (!sit)
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return -NLE_NOMEM;
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link->l_info = sit;
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}
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return 0;
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}
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static int sit_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_IPTUN_MAX + 1];
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struct sit_info *sit;
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int err;
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NL_DBG(3, "Parsing SIT link info\n");
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err = nla_parse_nested(tb, IFLA_IPTUN_MAX, data, sit_policy);
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if (err < 0)
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goto errout;
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err = sit_alloc(link);
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if (err < 0)
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goto errout;
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sit = link->l_info;
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if (tb[IFLA_IPTUN_LINK]) {
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sit->link = nla_get_u32(tb[IFLA_IPTUN_LINK]);
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sit->sit_mask |= SIT_ATTR_LINK;
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}
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if (tb[IFLA_IPTUN_LOCAL]) {
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sit->local = nla_get_u32(tb[IFLA_IPTUN_LOCAL]);
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sit->sit_mask |= SIT_ATTR_LOCAL;
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}
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if (tb[IFLA_IPTUN_REMOTE]) {
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sit->remote = nla_get_u32(tb[IFLA_IPTUN_REMOTE]);
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sit->sit_mask |= SIT_ATTR_REMOTE;
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}
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if (tb[IFLA_IPTUN_TTL]) {
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sit->ttl = nla_get_u8(tb[IFLA_IPTUN_TTL]);
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sit->sit_mask |= SIT_ATTR_TTL;
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}
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if (tb[IFLA_IPTUN_TOS]) {
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sit->tos = nla_get_u8(tb[IFLA_IPTUN_TOS]);
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sit->sit_mask |= SIT_ATTR_TOS;
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}
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if (tb[IFLA_IPTUN_PMTUDISC]) {
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sit->pmtudisc = nla_get_u8(tb[IFLA_IPTUN_PMTUDISC]);
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sit->sit_mask |= SIT_ATTR_PMTUDISC;
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}
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if (tb[IFLA_IPTUN_FLAGS]) {
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sit->flags = nla_get_u16(tb[IFLA_IPTUN_FLAGS]);
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sit->sit_mask |= SIT_ATTR_FLAGS;
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}
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if (tb[IFLA_IPTUN_PROTO]) {
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sit->proto = nla_get_u8(tb[IFLA_IPTUN_PROTO]);
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sit->sit_mask |= SIT_ATTR_PROTO;
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}
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if (tb[IFLA_IPTUN_6RD_PREFIX]) {
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nla_memcpy(&sit->ip6rd_prefix, tb[IFLA_IPTUN_6RD_PREFIX],
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sizeof(struct in6_addr));
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sit->sit_mask |= SIT_ATTR_6RD_PREFIX;
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}
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if (tb[IFLA_IPTUN_6RD_RELAY_PREFIX]) {
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sit->ip6rd_relay_prefix = nla_get_u32(tb[IFLA_IPTUN_6RD_RELAY_PREFIX]);
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sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIX;
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}
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if (tb[IFLA_IPTUN_6RD_PREFIXLEN]) {
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sit->ip6rd_prefixlen = nla_get_u16(tb[IFLA_IPTUN_6RD_PREFIXLEN]);
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sit->sit_mask |= SIT_ATTR_6RD_PREFIXLEN;
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}
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if (tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) {
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sit->ip6rd_relay_prefixlen = nla_get_u16(tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
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sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIXLEN;
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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 sit_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
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{
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struct sit_info *sit = 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 (sit->sit_mask & SIT_ATTR_LINK)
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NLA_PUT_U32(msg, IFLA_IPTUN_LINK, sit->link);
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if (sit->sit_mask & SIT_ATTR_LOCAL)
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NLA_PUT_U32(msg, IFLA_IPTUN_LOCAL, sit->local);
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if (sit->sit_mask & SIT_ATTR_REMOTE)
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NLA_PUT_U32(msg, IFLA_IPTUN_REMOTE, sit->remote);
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if (sit->sit_mask & SIT_ATTR_TTL)
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NLA_PUT_U8(msg, IFLA_IPTUN_TTL, sit->ttl);
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if (sit->sit_mask & SIT_ATTR_TOS)
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NLA_PUT_U8(msg, IFLA_IPTUN_TOS, sit->tos);
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if (sit->sit_mask & SIT_ATTR_PMTUDISC)
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NLA_PUT_U8(msg, IFLA_IPTUN_PMTUDISC, sit->pmtudisc);
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if (sit->sit_mask & SIT_ATTR_FLAGS)
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NLA_PUT_U16(msg, IFLA_IPTUN_FLAGS, sit->flags);
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if (sit->sit_mask & SIT_ATTR_PROTO)
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NLA_PUT_U8(msg, IFLA_IPTUN_PROTO, sit->proto);
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if (sit->sit_mask & SIT_ATTR_6RD_PREFIX)
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NLA_PUT(msg, IFLA_IPTUN_6RD_PREFIX, sizeof(struct in6_addr), &sit->ip6rd_prefix);
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if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX)
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NLA_PUT_U32(msg, IFLA_IPTUN_6RD_RELAY_PREFIX, sit->ip6rd_relay_prefix);
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if (sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN)
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NLA_PUT_U16(msg, IFLA_IPTUN_6RD_PREFIXLEN, sit->ip6rd_prefixlen);
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if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIXLEN)
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NLA_PUT_U16(msg, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, sit->ip6rd_relay_prefixlen);
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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 sit_free(struct rtnl_link *link)
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{
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struct sit_info *sit = link->l_info;
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free(sit);
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link->l_info = NULL;
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}
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static void sit_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
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{
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nl_dump(p, "sit : %s", link->l_name);
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}
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static void sit_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
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{
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struct sit_info *sit = link->l_info;
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char *name, addr[INET_ADDRSTRLEN], addr6[INET6_ADDRSTRLEN];
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struct rtnl_link *parent;
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if (sit->sit_mask & SIT_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, sit->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", sit->link);
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}
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if (sit->sit_mask & SIT_ATTR_LOCAL) {
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nl_dump(p, " local ");
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if(inet_ntop(AF_INET, &sit->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(sit->local));
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}
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if (sit->sit_mask & SIT_ATTR_REMOTE) {
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nl_dump(p, " remote ");
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if(inet_ntop(AF_INET, &sit->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(sit->remote));
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}
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if (sit->sit_mask & SIT_ATTR_TTL) {
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nl_dump(p, " ttl ");
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nl_dump_line(p, "%u\n", sit->ttl);
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}
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if (sit->sit_mask & SIT_ATTR_TOS) {
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nl_dump(p, " tos ");
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nl_dump_line(p, "%u\n", sit->tos);
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}
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if (sit->sit_mask & SIT_ATTR_FLAGS) {
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nl_dump(p, " flags ");
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nl_dump_line(p, " (%x)\n", sit->flags);
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}
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if (sit->sit_mask & SIT_ATTR_PROTO) {
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nl_dump(p, " proto ");
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nl_dump_line(p, " (%x)\n", sit->proto);
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}
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if (sit->sit_mask & SIT_ATTR_6RD_PREFIX) {
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nl_dump(p, " 6rd_prefix ");
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if(inet_ntop(AF_INET6, &sit->ip6rd_prefix, addr6, INET6_ADDRSTRLEN))
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nl_dump_line(p, "%s\n", addr6);
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else
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nl_dump_line(p, "[unknown]\n");
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}
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if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX) {
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nl_dump(p, " 6rd_relay_prefix ");
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if(inet_ntop(AF_INET, &sit->ip6rd_relay_prefix, 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, "[unknown]\n");
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}
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if (sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN) {
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nl_dump(p, " 6rd_prefixlen ");
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nl_dump_line(p, "%d\n", sit->ip6rd_prefixlen);
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}
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if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIXLEN) {
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nl_dump(p, " 6rd_relay_prefixlen ");
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nl_dump_line(p, "%d\n", sit->ip6rd_relay_prefixlen);
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}
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}
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static int sit_clone(struct rtnl_link *dst, struct rtnl_link *src)
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{
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struct sit_info *sit_dst, *sit_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, "sit");
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if (err < 0)
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return err;
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sit_dst = dst->l_info;
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if (!sit_dst || !sit_src)
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return -NLE_NOMEM;
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memcpy(sit_dst, sit_src, sizeof(struct sit_info));
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return 0;
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}
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static struct rtnl_link_info_ops sit_info_ops = {
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.io_name = "sit",
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.io_alloc = sit_alloc,
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.io_parse = sit_parse,
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.io_dump = {
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[NL_DUMP_LINE] = sit_dump_line,
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[NL_DUMP_DETAILS] = sit_dump_details,
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},
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.io_clone = sit_clone,
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.io_put_attrs = sit_put_attrs,
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.io_free = sit_free,
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};
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#define IS_SIT_LINK_ASSERT(link, sit) \
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struct sit_info *sit; \
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do { \
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const struct rtnl_link *_link = (link); \
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if (!_link || _link->l_info_ops != &sit_info_ops) { \
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APPBUG("Link is not a sit link. set type \"sit\" first."); \
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return -NLE_OPNOTSUPP; \
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} \
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(sit) = _link->l_info; \
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} while (0)
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struct rtnl_link *rtnl_link_sit_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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|
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err = rtnl_link_set_type(link, "sit");
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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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|
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return link;
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}
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|
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/**
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* Check if link is a SIT link
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* @arg link Link object
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*
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* @return True if link is a SIT link, otherwise false is returned.
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*/
|
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int rtnl_link_is_sit(struct rtnl_link *link)
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{
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return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "sit");
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}
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|
|
/**
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* Create a new sit tunnel device
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* @arg sock netlink socket
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* @arg name name of the tunnel device
|
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*
|
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* Creates a new sit 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_sit_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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|
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link = rtnl_link_sit_alloc();
|
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if (!link)
|
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return -NLE_NOMEM;
|
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|
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if(name)
|
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rtnl_link_set_name(link, name);
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|
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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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|
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return err;
|
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}
|
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|
|
/**
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* Set SIT 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_sit_set_link(struct rtnl_link *link, uint32_t index)
|
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{
|
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IS_SIT_LINK_ASSERT(link, sit);
|
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|
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sit->link = index;
|
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sit->sit_mask |= SIT_ATTR_LINK;
|
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|
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return 0;
|
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}
|
|
|
|
/**
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* Get SIT tunnel interface index
|
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* @arg link Link object
|
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*
|
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* @return interface index value
|
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*/
|
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uint32_t rtnl_link_sit_get_link(struct rtnl_link *link)
|
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{
|
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IS_SIT_LINK_ASSERT(link, sit);
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|
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return sit->link;
|
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}
|
|
|
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/**
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* Set SIT 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_sit_set_local(struct rtnl_link *link, uint32_t addr)
|
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{
|
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IS_SIT_LINK_ASSERT(link, sit);
|
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|
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sit->local = addr;
|
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sit->sit_mask |= SIT_ATTR_LOCAL;
|
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|
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return 0;
|
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}
|
|
|
|
/**
|
|
* Get SIT tunnel local address
|
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* @arg link Link object
|
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*
|
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* @return local address value
|
|
*/
|
|
uint32_t rtnl_link_sit_get_local(struct rtnl_link *link)
|
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{
|
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IS_SIT_LINK_ASSERT(link, sit);
|
|
|
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return sit->local;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel remote address
|
|
* @arg link Link object
|
|
* @arg remote remote address
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_remote(struct rtnl_link *link, uint32_t addr)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->remote = addr;
|
|
sit->sit_mask |= SIT_ATTR_REMOTE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT tunnel remote address
|
|
* @arg link Link object
|
|
*
|
|
* @return remote address
|
|
*/
|
|
uint32_t rtnl_link_sit_get_remote(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->remote;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel ttl
|
|
* @arg link Link object
|
|
* @arg ttl tunnel ttl
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_ttl(struct rtnl_link *link, uint8_t ttl)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->ttl = ttl;
|
|
sit->sit_mask |= SIT_ATTR_TTL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT tunnel ttl
|
|
* @arg link Link object
|
|
*
|
|
* @return ttl value
|
|
*/
|
|
uint8_t rtnl_link_sit_get_ttl(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->ttl;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel tos
|
|
* @arg link Link object
|
|
* @arg tos tunnel tos
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_tos(struct rtnl_link *link, uint8_t tos)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->tos = tos;
|
|
sit->sit_mask |= SIT_ATTR_TOS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT tunnel tos
|
|
* @arg link Link object
|
|
*
|
|
* @return tos value
|
|
*/
|
|
uint8_t rtnl_link_sit_get_tos(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->tos;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel path MTU discovery
|
|
* @arg link Link object
|
|
* @arg pmtudisc path MTU discovery
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->pmtudisc = pmtudisc;
|
|
sit->sit_mask |= SIT_ATTR_PMTUDISC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT path MTU discovery
|
|
* @arg link Link object
|
|
*
|
|
* @return pmtudisc value
|
|
*/
|
|
uint8_t rtnl_link_sit_get_pmtudisc(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->pmtudisc;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel flags
|
|
* @arg link Link object
|
|
* @arg flags tunnel flags
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_flags(struct rtnl_link *link, uint16_t flags)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->flags = flags;
|
|
sit->sit_mask |= SIT_ATTR_FLAGS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT path flags
|
|
* @arg link Link object
|
|
*
|
|
* @return flags value
|
|
*/
|
|
uint16_t rtnl_link_sit_get_flags(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->flags;
|
|
}
|
|
|
|
/**
|
|
* Set SIT tunnel proto
|
|
* @arg link Link object
|
|
* @arg proto tunnel proto
|
|
*
|
|
* @return 0 on success or a negative error code
|
|
*/
|
|
int rtnl_link_sit_set_proto(struct rtnl_link *link, uint8_t proto)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->proto = proto;
|
|
sit->sit_mask |= SIT_ATTR_PROTO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get SIT proto
|
|
* @arg link Link object
|
|
*
|
|
* @return proto value
|
|
*/
|
|
uint8_t rtnl_link_sit_get_proto(struct rtnl_link *link)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
return sit->proto;
|
|
}
|
|
|
|
/**
|
|
* Set ip6rd prefix
|
|
* @arg link Link object
|
|
* @arg prefix The IPv6 prefix
|
|
*
|
|
* @return 0 on success or an error code.
|
|
*/
|
|
int rtnl_link_sit_set_ip6rd_prefix(struct rtnl_link *link, const struct in6_addr *prefix)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->ip6rd_prefix = *prefix;
|
|
sit->sit_mask |= SIT_ATTR_6RD_PREFIX;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get ip6rd prefix
|
|
* @arg link Link object
|
|
* @arg prefix The output IPv6 prefix
|
|
*
|
|
* @return 0 on success or an error code. If the property is unset,
|
|
* this call fails too.
|
|
*/
|
|
int rtnl_link_sit_get_ip6rd_prefix(const struct rtnl_link *link, struct in6_addr *prefix)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
if (!(sit->sit_mask & SIT_ATTR_6RD_PREFIX))
|
|
return -NLE_NOATTR;
|
|
|
|
if (prefix)
|
|
*prefix = sit->ip6rd_prefix;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set ip6rd prefix length
|
|
* @arg link Link object
|
|
* @arg prefixlen The IPv6 prefix length
|
|
*
|
|
* @return 0 on success or an error code.
|
|
*/
|
|
int rtnl_link_sit_set_ip6rd_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->sit_mask |= SIT_ATTR_6RD_PREFIXLEN;
|
|
sit->ip6rd_prefixlen = prefixlen;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get ip6rd prefix length
|
|
* @arg link Link object
|
|
* @arg prefixlen Output pointer for the prefix length
|
|
*
|
|
* @return 0 on success or an error code. If the property is unset,
|
|
* this call fails.
|
|
*/
|
|
int rtnl_link_sit_get_ip6rd_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
if (!(sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN))
|
|
return -NLE_NOATTR;
|
|
|
|
if (prefixlen)
|
|
*prefixlen = sit->ip6rd_prefixlen;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set ip6rd relay prefix
|
|
* @arg link Link object
|
|
* @arg prefix The IPv6 prefix length
|
|
*
|
|
* @return 0 on success or an error code.
|
|
*/
|
|
int rtnl_link_sit_set_ip6rd_relay_prefix(struct rtnl_link *link, uint32_t prefix)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIX;
|
|
sit->ip6rd_relay_prefix = prefix;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get ip6rd prefix length
|
|
* @arg link Link object
|
|
* @arg prefixlen Output pointer for the prefix length
|
|
*
|
|
* @return 0 on success or an error code. If the property is unset,
|
|
* this call fails.
|
|
*/
|
|
int rtnl_link_sit_get_ip6rd_relay_prefix(const struct rtnl_link *link, uint32_t *prefix)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
if (!(sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX))
|
|
return -NLE_NOATTR;
|
|
|
|
if (prefix)
|
|
*prefix = sit->ip6rd_relay_prefix;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set ip6rd relay prefix length
|
|
* @arg link Link object
|
|
* @arg prefixlen The IPv6 prefix length
|
|
*
|
|
* @return 0 on success or an error code.
|
|
*/
|
|
int rtnl_link_sit_set_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIXLEN;
|
|
sit->ip6rd_relay_prefixlen = prefixlen;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get ip6rd relay prefix length
|
|
* @arg link Link object
|
|
* @arg prefixlen Output pointer for the prefix length
|
|
*
|
|
* @return 0 on success or an error code. If the property is unset,
|
|
* this call fails.
|
|
*/
|
|
int rtnl_link_sit_get_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
|
|
{
|
|
IS_SIT_LINK_ASSERT(link, sit);
|
|
|
|
if (!(sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX))
|
|
return -NLE_NOATTR;
|
|
|
|
if (prefixlen)
|
|
*prefixlen = sit->ip6rd_relay_prefixlen;
|
|
return 0;
|
|
}
|
|
|
|
static void __init sit_init(void)
|
|
{
|
|
rtnl_link_register_info(&sit_info_ops);
|
|
}
|
|
|
|
static void __exit sit_exit(void)
|
|
{
|
|
rtnl_link_unregister_info(&sit_info_ops);
|
|
}
|