--- /dev/null
+/*
+ * lib/route/link/ipgre.c IPGRE Link Info
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * Copyright (c) 2014 Susant Sahani <susant@redhat.com>
+ */
+
+/**
+ * @ingroup link
+ * @defgroup ipgre IPGRE
+ * ipgre link module
+ *
+ * @details
+ * \b Link Type Name: "ipgre"
+ *
+ * @route_doc{link_ipgre, IPGRE Documentation}
+ *
+ * @{
+ */
+
+#include <netlink-private/netlink.h>
+#include <netlink/netlink.h>
+#include <netlink/attr.h>
+#include <netlink/utils.h>
+#include <netlink/object.h>
+#include <netlink/route/rtnl.h>
+#include <netlink-private/route/link/api.h>
+#include <linux/if_tunnel.h>
+
+#define IPGRE_ATTR_LINK (1 << 0)
+#define IPGRE_ATTR_IFLAGS (1 << 1)
+#define IPGRE_ATTR_OFLAGS (1 << 2)
+#define IPGRE_ATTR_IKEY (1 << 3)
+#define IPGRE_ATTR_OKEY (1 << 4)
+#define IPGRE_ATTR_LOCAL (1 << 5)
+#define IPGRE_ATTR_REMOTE (1 << 6)
+#define IPGRE_ATTR_TTL (1 << 7)
+#define IPGRE_ATTR_TOS (1 << 8)
+#define IPGRE_ATTR_PMTUDISC (1 << 9)
+
+struct ipgre_info
+{
+ uint8_t ttl;
+ uint8_t tos;
+ uint8_t pmtudisc;
+ uint16_t iflags;
+ uint16_t oflags;
+ uint32_t ikey;
+ uint32_t okey;
+ uint32_t link;
+ uint32_t local;
+ uint32_t remote;
+ uint32_t ipgre_mask;
+};
+
+static struct nla_policy ipgre_policy[IFLA_GRE_MAX + 1] = {
+ [IFLA_GRE_LINK] = { .type = NLA_U32 },
+ [IFLA_GRE_IFLAGS] = { .type = NLA_U16 },
+ [IFLA_GRE_OFLAGS] = { .type = NLA_U16 },
+ [IFLA_GRE_IKEY] = { .type = NLA_U32 },
+ [IFLA_GRE_OKEY] = { .type = NLA_U32 },
+ [IFLA_GRE_LOCAL] = { .type = NLA_U32 },
+ [IFLA_GRE_REMOTE] = { .type = NLA_U32 },
+ [IFLA_GRE_TTL] = { .type = NLA_U8 },
+ [IFLA_GRE_TOS] = { .type = NLA_U8 },
+ [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
+};
+
+static int ipgre_alloc(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre;
+
+ ipgre = calloc(1, sizeof(*ipgre));
+ if (!ipgre)
+ return -NLE_NOMEM;
+
+ link->l_info = ipgre;
+
+ return 0;
+}
+
+static int ipgre_parse(struct rtnl_link *link, struct nlattr *data,
+ struct nlattr *xstats)
+{
+ struct nlattr *tb[IFLA_IPTUN_MAX + 1];
+ struct ipgre_info *ipgre;
+ int err;
+
+ NL_DBG(3, "Parsing IPGRE link info");
+
+ err = nla_parse_nested(tb, IFLA_GRE_MAX, data, ipgre_policy);
+ if (err < 0)
+ goto errout;
+
+ err = ipgre_alloc(link);
+ if (err < 0)
+ goto errout;
+
+ ipgre = link->l_info;
+
+ if (tb[IFLA_GRE_LINK]) {
+ ipgre->link = nla_get_u32(tb[IFLA_GRE_LINK]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
+ }
+
+ if (tb[IFLA_GRE_IFLAGS]) {
+ ipgre->iflags = nla_get_u16(tb[IFLA_GRE_IFLAGS]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
+ }
+
+ if (tb[IFLA_GRE_OFLAGS]) {
+ ipgre->oflags = nla_get_u16(tb[IFLA_GRE_OFLAGS]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
+ }
+
+ if (tb[IFLA_GRE_IKEY]) {
+ ipgre->ikey = nla_get_u32(tb[IFLA_GRE_IKEY]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
+ }
+
+ if (tb[IFLA_GRE_OKEY]) {
+ ipgre->okey = nla_get_u32(tb[IFLA_GRE_OKEY]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
+ }
+
+ if (tb[IFLA_GRE_LOCAL]) {
+ ipgre->local = nla_get_u32(tb[IFLA_GRE_LOCAL]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
+ }
+
+ if (tb[IFLA_GRE_LOCAL]) {
+ ipgre->remote = nla_get_u32(tb[IFLA_GRE_LOCAL]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
+ }
+
+ if (tb[IFLA_GRE_TTL]) {
+ ipgre->ttl = nla_get_u8(tb[IFLA_GRE_TTL]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
+ }
+
+ if (tb[IFLA_GRE_TOS]) {
+ ipgre->tos = nla_get_u8(tb[IFLA_GRE_TOS]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
+ }
+
+ if (tb[IFLA_GRE_PMTUDISC]) {
+ ipgre->pmtudisc = nla_get_u8(tb[IFLA_GRE_PMTUDISC]);
+ ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
+ }
+
+ err = 0;
+
+ errout:
+ return err;
+}
+
+static int ipgre_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+ struct nlattr *data;
+
+ data = nla_nest_start(msg, IFLA_INFO_DATA);
+ if (!data)
+ return -NLE_MSGSIZE;
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_LINK)
+ NLA_PUT_U32(msg, IFLA_GRE_LINK, ipgre->link);
+
+ if (ipgre->ipgre_mask & IFLA_GRE_IFLAGS)
+ NLA_PUT_U16(msg, IFLA_GRE_IFLAGS, ipgre->iflags);
+
+ if (ipgre->ipgre_mask & IFLA_GRE_OFLAGS)
+ NLA_PUT_U16(msg, IFLA_GRE_OFLAGS, ipgre->oflags);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY)
+ NLA_PUT_U32(msg, IFLA_GRE_IKEY, ipgre->ikey);
+
+ if (ipgre->ipgre_mask & IFLA_GRE_OKEY)
+ NLA_PUT_U32(msg, IFLA_GRE_OKEY, ipgre->okey);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL)
+ NLA_PUT_U32(msg, IFLA_GRE_LOCAL, ipgre->local);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE)
+ NLA_PUT_U32(msg, IFLA_GRE_REMOTE, ipgre->remote);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_TTL)
+ NLA_PUT_U8(msg, IFLA_GRE_TTL, ipgre->ttl);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_TOS)
+ NLA_PUT_U8(msg, IFLA_GRE_TOS, ipgre->tos);
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC)
+ NLA_PUT_U8(msg, IFLA_GRE_PMTUDISC, ipgre->pmtudisc);
+
+ nla_nest_end(msg, data);
+
+ nla_put_failure:
+
+ return 0;
+}
+
+static void ipgre_free(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ free(ipgre);
+ link->l_info = NULL;
+}
+
+static void ipgre_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
+{
+ nl_dump(p, "ipgre : %s", link->l_name);
+}
+
+static void ipgre_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
+{
+ struct ipgre_info *ipgre = link->l_info;
+ char *name, addr[INET_ADDRSTRLEN];
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_LINK) {
+ nl_dump(p, " link ");
+ name = rtnl_link_get_name(link);
+ if (name)
+ nl_dump_line(p, "%s\n", name);
+ else
+ nl_dump_line(p, "%u\n", ipgre->link);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_IFLAGS) {
+ nl_dump(p, " iflags ");
+ nl_dump_line(p, "%x\n", ipgre->iflags);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_OFLAGS) {
+ nl_dump(p, " oflags ");
+ nl_dump_line(p, "%x\n", ipgre->oflags);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY) {
+ nl_dump(p, " ikey ");
+ nl_dump_line(p, "%x\n",ipgre->ikey);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY) {
+ nl_dump(p, " okey ");
+ nl_dump_line(p, "%x\n", ipgre->okey);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL) {
+ nl_dump(p, " local ");
+ if(inet_ntop(AF_INET, &ipgre->local, addr, sizeof(addr)))
+ nl_dump_line(p, "%s\n", addr);
+ else
+ nl_dump_line(p, "%#x\n", ntohs(ipgre->local));
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE) {
+ nl_dump(p, " remote ");
+ if(inet_ntop(AF_INET, &ipgre->remote, addr, sizeof(addr)))
+ nl_dump_line(p, "%s\n", addr);
+ else
+ nl_dump_line(p, "%#x\n", ntohs(ipgre->remote));
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_TTL) {
+ nl_dump(p, " ttl ");
+ nl_dump_line(p, "%u\n", ipgre->ttl);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_TOS) {
+ nl_dump(p, " tos ");
+ nl_dump_line(p, "%u\n", ipgre->tos);
+ }
+
+ if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC) {
+ nl_dump(p, " pmtudisc ");
+ nl_dump_line(p, "enabled (%#x)\n", ipgre->pmtudisc);
+ }
+}
+
+static int ipgre_clone(struct rtnl_link *dst, struct rtnl_link *src)
+{
+ struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
+ int err;
+
+ dst->l_info = NULL;
+
+ err = rtnl_link_set_type(dst, "gre");
+ if (err < 0)
+ return err;
+
+ ipgre_dst = dst->l_info;
+
+ if (!ipgre_dst || !ipgre_src)
+ BUG();
+
+ memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
+
+ return 0;
+}
+
+static struct rtnl_link_info_ops ipgre_info_ops = {
+ .io_name = "gre",
+ .io_alloc = ipgre_alloc,
+ .io_parse = ipgre_parse,
+ .io_dump = {
+ [NL_DUMP_LINE] = ipgre_dump_line,
+ [NL_DUMP_DETAILS] = ipgre_dump_details,
+ },
+ .io_clone = ipgre_clone,
+ .io_put_attrs = ipgre_put_attrs,
+ .io_free = ipgre_free,
+};
+
+#define IS_IPGRE_LINK_ASSERT(link) \
+ if ((link)->l_info_ops != &ipgre_info_ops) { \
+ APPBUG("Link is not a ipgre link. set type \"gre\" first.");\
+ return -NLE_OPNOTSUPP; \
+ }
+
+struct rtnl_link *rtnl_link_ipgre_alloc(void)
+{
+ struct rtnl_link *link;
+ int err;
+
+ link = rtnl_link_alloc();
+ if (!link)
+ return NULL;
+
+ err = rtnl_link_set_type(link, "gre");
+ if (err < 0) {
+ rtnl_link_put(link);
+ return NULL;
+ }
+
+ return link;
+}
+
+/**
+ * Check if link is a IPGRE link
+ * @arg link Link object
+ *
+ * @return True if link is a IPGRE link, otherwise 0 is returned.
+ */
+int rtnl_link_is_ipgre(struct rtnl_link *link)
+{
+ return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gre");
+}
+/**
+ * Create a new ipip tunnel device
+ * @arg sock netlink socket
+ * @arg name name of the tunnel deviceL
+ *
+ * Creates a new ipip tunnel device in the kernel
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
+{
+ struct rtnl_link *link;
+ int err;
+
+ link = rtnl_link_ipgre_alloc();
+ if (!link)
+ return -NLE_NOMEM;
+
+ if(name)
+ rtnl_link_set_name(link, name);
+
+ err = rtnl_link_add(sk, link, NLM_F_CREATE);
+ rtnl_link_put(link);
+
+ return err;
+}
+/**
+ * Set IPGRE tunnel interface index
+ * @arg link Link object
+ * @arg index interface index
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->link = index;
+ ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel interface index
+ * @arg link Link object
+ *
+ * @return interface index
+ */
+uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->link;
+}
+
+/**
+ * Set IPGRE tunnel set iflags
+ * @arg link Link object
+ * @arg iflags gre iflags
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->iflags = iflags;
+ ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel iflags
+ * @arg link Link object
+ *
+ * @return iflags
+ */
+uint16_t rtnl_link_get_iflags(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->iflags;
+}
+
+/**
+ * Set IPGRE tunnel set oflags
+ * @arg link Link object
+ * @arg iflags gre oflags
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->oflags = oflags;
+ ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel oflags
+ * @arg link Link object
+ *
+ * @return oflags
+ */
+uint16_t rtnl_link_get_oflags(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->oflags;
+}
+
+/**
+ * Set IPGRE tunnel set ikey
+ * @arg link Link object
+ * @arg ikey gre ikey
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->ikey = ikey;
+ ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel ikey
+ * @arg link Link object
+ *
+ * @return ikey
+ */
+uint32_t rtnl_link_get_ikey(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->ikey;
+}
+
+/**
+ * Set IPGRE tunnel set okey
+ * @arg link Link object
+ * @arg okey gre okey
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->okey = okey;
+ ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel okey
+ * @arg link Link object
+ *
+ * @return okey value
+ */
+uint32_t rtnl_link_get_okey(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->okey;
+}
+
+/**
+ * Set IPGRE tunnel local address
+ * @arg link Link object
+ * @arg addr local address
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->local = addr;
+ ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel local address
+ * @arg link Link object
+ *
+ * @return local address
+ */
+uint32_t rtnl_link_get_local(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->local;
+}
+
+/**
+ * Set IPGRE tunnel remote address
+ * @arg link Link object
+ * @arg remote remote address
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->remote = remote;
+ ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel remote address
+ * @arg link Link object
+ *
+ * @return remote address on success or a negative error code
+ */
+uint32_t rtnl_link_get_remote(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->remote;
+}
+
+/**
+ * Set IPGRE tunnel ttl
+ * @arg link Link object
+ * @arg ttl tunnel ttl
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->ttl = ttl;
+ ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
+
+ return 0;
+}
+
+/**
+ * Set IPGRE tunnel ttl
+ * @arg link Link object
+ *
+ * @return ttl value
+ */
+uint8_t rtnl_link_get_ttl(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->ttl;
+}
+
+/**
+ * Set IPGRE tunnel tos
+ * @arg link Link object
+ * @arg tos tunnel tos
+ *
+ * @return 0 on success or a negative error code
+ */
+int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->tos = tos;
+ ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE tunnel tos
+ * @arg link Link object
+ *
+ * @return tos value
+ */
+uint8_t rtnl_link_get_tos(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->tos;
+}
+
+/**
+ * Set IPGRE 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_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ ipgre->pmtudisc = pmtudisc;
+ ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
+
+ return 0;
+}
+
+/**
+ * Get IPGRE path MTU discovery
+ * @arg link Link object
+ *
+ * @return pmtudisc value
+ */
+uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link)
+{
+ struct ipgre_info *ipgre = link->l_info;
+
+ IS_IPGRE_LINK_ASSERT(link);
+
+ return ipgre->pmtudisc;
+}
+
+static void __init ipgre_init(void)
+{
+ rtnl_link_register_info(&ipgre_info_ops);
+}
+
+static void __exit ipgre_exit(void)
+{
+ rtnl_link_unregister_info(&ipgre_info_ops);
+}
projects / thirdparty / libnl.git / commitdiff
