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author | Susant Sahani <susant@redhat.com> | 2014-05-06 05:41:30 (GMT) |
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committer | Thomas Haller <thaller@redhat.com> | 2014-05-06 10:04:02 (GMT) |
commit | 8f6301426a00d992d00238c7ddd666e96aa63e28 (patch) | |
tree | 264d1e1d44daf9ce6ff5d2448538b55e0dfc0567 /lib/route/link/ipvti.c | |
parent | adb9f5d8fa605a458dbd97411564fae2584af2f7 (diff) | |
download | libnl-8f6301426a00d992d00238c7ddd666e96aa63e28.zip libnl-8f6301426a00d992d00238c7ddd666e96aa63e28.tar.gz libnl-8f6301426a00d992d00238c7ddd666e96aa63e28.tar.bz2 |
ipvti: introduce vti tunnel support
Signed-off-by: Susant Sahani <susant@redhat.com>
[thaller@redhat.com: some whitespace fixes]
Signed-off-by: Thomas Haller <thaller@redhat.com>
Diffstat (limited to 'lib/route/link/ipvti.c')
-rw-r--r-- | lib/route/link/ipvti.c | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/lib/route/link/ipvti.c b/lib/route/link/ipvti.c new file mode 100644 index 0000000..71f61c3 --- /dev/null +++ b/lib/route/link/ipvti.c @@ -0,0 +1,477 @@ + /* + * lib/route/link/ipvti.c IPVTI 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 ipvti IPVTI + * ipvti link module + * + * @details + * \b Link Type Name: "ipvti" + * + * @route_doc{link_ipvti, IPVTI 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 IPVTI_ATTR_LINK (1 << 0) +#define IPVTI_ATTR_IKEY (1 << 1) +#define IPVTI_ATTR_OKEY (1 << 2) +#define IPVTI_ATTR_LOCAL (1 << 3) +#define IPVTI_ATTR_REMOTE (1 << 4) + +struct ipvti_info +{ + uint32_t link; + uint32_t ikey; + uint32_t okey; + uint32_t local; + uint32_t remote; + uint32_t ipvti_mask; +}; + +static struct nla_policy ipvti_policy[IFLA_GRE_MAX + 1] = { + [IFLA_VTI_LINK] = { .type = NLA_U32 }, + [IFLA_VTI_IKEY] = { .type = NLA_U32 }, + [IFLA_VTI_OKEY] = { .type = NLA_U32 }, + [IFLA_VTI_LOCAL] = { .type = NLA_U32 }, + [IFLA_VTI_REMOTE] = { .type = NLA_U32 }, +}; + +static int ipvti_alloc(struct rtnl_link *link) +{ + struct ipvti_info *ipvti; + + ipvti = calloc(1, sizeof(*ipvti)); + if (!ipvti) + return -NLE_NOMEM; + + link->l_info = ipvti; + + return 0; +} + +static int ipvti_parse(struct rtnl_link *link, struct nlattr *data, + struct nlattr *xstats) +{ + struct nlattr *tb[IFLA_IPTUN_MAX + 1]; + struct ipvti_info *ipvti; + int err; + + NL_DBG(3, "Parsing IPVTI link info"); + + err = nla_parse_nested(tb, IFLA_GRE_MAX, data, ipvti_policy); + if (err < 0) + goto errout; + + err = ipvti_alloc(link); + if (err < 0) + goto errout; + + ipvti = link->l_info; + + if (tb[IFLA_VTI_LINK]) { + ipvti->link = nla_get_u32(tb[IFLA_VTI_LINK]); + ipvti->ipvti_mask |= IPVTI_ATTR_LINK; + } + + if (tb[IFLA_VTI_IKEY]) { + ipvti->ikey = nla_get_u32(tb[IFLA_VTI_IKEY]); + ipvti->ipvti_mask |= IPVTI_ATTR_IKEY; + } + + if (tb[IFLA_VTI_OKEY]) { + ipvti->okey = nla_get_u32(tb[IFLA_VTI_OKEY]); + ipvti->ipvti_mask |= IPVTI_ATTR_OKEY; + } + + if (tb[IFLA_VTI_LOCAL]) { + ipvti->local = nla_get_u32(tb[IFLA_VTI_LOCAL]); + ipvti->ipvti_mask |= IPVTI_ATTR_LOCAL; + } + + if (tb[IFLA_VTI_REMOTE]) { + ipvti->remote = nla_get_u32(tb[IFLA_VTI_REMOTE]); + ipvti->ipvti_mask |= IPVTI_ATTR_REMOTE; + } + + err = 0; + + errout: + return err; +} + +static int ipvti_put_attrs(struct nl_msg *msg, struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + struct nlattr *data; + + data = nla_nest_start(msg, IFLA_INFO_DATA); + if (!data) + return -NLE_MSGSIZE; + + if (ipvti->ipvti_mask & IPVTI_ATTR_LINK) + NLA_PUT_U32(msg, IFLA_VTI_LINK, ipvti->link); + + if (ipvti->ipvti_mask & IPVTI_ATTR_IKEY) + NLA_PUT_U32(msg, IFLA_VTI_IKEY, ipvti->ikey); + + if (ipvti->ipvti_mask & IFLA_VTI_IKEY) + NLA_PUT_U32(msg, IFLA_VTI_OKEY, ipvti->okey); + + if (ipvti->ipvti_mask & IPVTI_ATTR_LOCAL) + NLA_PUT_U32(msg, IFLA_VTI_LOCAL, ipvti->local); + + if (ipvti->ipvti_mask & IPVTI_ATTR_REMOTE) + NLA_PUT_U32(msg, IFLA_VTI_REMOTE, ipvti->remote); + + nla_nest_end(msg, data); + +nla_put_failure: + + return 0; +} + +static void ipvti_free(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + free(ipvti); + link->l_info = NULL; +} + +static void ipvti_dump_line(struct rtnl_link *link, struct nl_dump_params *p) +{ + nl_dump(p, "ipvti : %s", link->l_name); +} + +static void ipvti_dump_details(struct rtnl_link *link, struct nl_dump_params *p) +{ + struct ipvti_info *ipvti = link->l_info; + char *name, addr[INET_ADDRSTRLEN]; + + if (ipvti->ipvti_mask & IPVTI_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", ipvti->link); + } + + if (ipvti->ipvti_mask & IPVTI_ATTR_IKEY) { + nl_dump(p, " ikey "); + nl_dump_line(p, "%x\n",ipvti->ikey); + } + + if (ipvti->ipvti_mask & IPVTI_ATTR_OKEY) { + nl_dump(p, " okey "); + nl_dump_line(p, "%x\n", ipvti->okey); + } + + if (ipvti->ipvti_mask & IPVTI_ATTR_LOCAL) { + nl_dump(p, " local "); + if(inet_ntop(AF_INET, &ipvti->local, addr, sizeof(addr))) + nl_dump_line(p, "%s\n", addr); + else + nl_dump_line(p, "%#x\n", ntohs(ipvti->local)); + } + + if (ipvti->ipvti_mask & IPVTI_ATTR_REMOTE) { + nl_dump(p, " remote "); + if(inet_ntop(AF_INET, &ipvti->remote, addr, sizeof(addr))) + nl_dump_line(p, "%s\n", addr); + else + nl_dump_line(p, "%#x\n", ntohs(ipvti->remote)); + } +} + +static int ipvti_clone(struct rtnl_link *dst, struct rtnl_link *src) +{ + struct ipvti_info *ipvti_dst, *ipvti_src = src->l_info; + int err; + + dst->l_info = NULL; + + err = rtnl_link_set_type(dst, "vti"); + if (err < 0) + return err; + + ipvti_dst = dst->l_info; + + if (!ipvti_dst || !ipvti_src) + BUG(); + + memcpy(ipvti_dst, ipvti_src, sizeof(struct ipvti_info)); + + return 0; +} + +static struct rtnl_link_info_ops ipvti_info_ops = { + .io_name = "vti", + .io_alloc = ipvti_alloc, + .io_parse = ipvti_parse, + .io_dump = { + [NL_DUMP_LINE] = ipvti_dump_line, + [NL_DUMP_DETAILS] = ipvti_dump_details, + }, + .io_clone = ipvti_clone, + .io_put_attrs = ipvti_put_attrs, + .io_free = ipvti_free, +}; + +#define IS_IPVTI_LINK_ASSERT(link) \ + if ((link)->l_info_ops != &ipvti_info_ops) { \ + APPBUG("Link is not a ipvti link. set type \vti\" first."); \ + return -NLE_OPNOTSUPP; \ + } + +struct rtnl_link *rtnl_link_ipvti_alloc(void) +{ + struct rtnl_link *link; + int err; + + link = rtnl_link_alloc(); + if (!link) + return NULL; + + err = rtnl_link_set_type(link, "vti"); + if (err < 0) { + rtnl_link_put(link); + return NULL; + } + + return link; +} + +/** + * Check if link is a IPVTI link + * @arg link Link object + * + * @return True if link is a IPVTI link, otherwise 0 is returned. + */ +int rtnl_link_is_ipvti(struct rtnl_link *link) +{ + return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "vti"); +} +/** + * Create a new ipvti tunnel device + * @arg sock netlink socket + * @arg name name of the tunnel deviceL + * + * Creates a new ipvti tunnel device in the kernel + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_add(struct nl_sock *sk, const char *name) +{ + struct rtnl_link *link; + int err; + + link = rtnl_link_ipvti_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 IPVTI tunnel interface index + * @arg link Link object + * @arg index interface index + * + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_set_link(struct rtnl_link *link, uint32_t index) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + ipvti->link = index; + ipvti->ipvti_mask |= IPVTI_ATTR_LINK; + + return 0; +} + +/** + * Get IPVTI tunnel interface index + * @arg link Link object + * + * @return interface index + */ +uint32_t rtnl_link_ipvti_get_link(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + return ipvti->link; +} + +/** + * Set IPVTI tunnel set ikey + * @arg link Link object + * @arg ikey gre ikey + * + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_set_ikey(struct rtnl_link *link, uint32_t ikey) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + ipvti->ikey = ikey; + ipvti->ipvti_mask |= IPVTI_ATTR_IKEY; + + return 0; +} + +/** + * Get IPVTI tunnel ikey + * @arg link Link object + * + * @return ikey + */ +uint32_t rtnl_link_ipvti_get_ikey(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + return ipvti->ikey; +} + +/** + * Set IPVTI tunnel set okey + * @arg link Link object + * @arg okey gre okey + * + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_set_okey(struct rtnl_link *link, uint32_t okey) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + ipvti->okey = okey; + ipvti->ipvti_mask |= IPVTI_ATTR_OKEY; + + return 0; +} + +/** + * Get IPVTI tunnel okey + * @arg link Link object + * + * @return okey value + */ +uint32_t rtnl_link_ipvti_get_okey(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + return ipvti->okey; +} + +/** + * Set IPVTI tunnel local address + * @arg link Link object + * @arg addr local address + * + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_set_local(struct rtnl_link *link, uint32_t addr) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + ipvti->local = addr; + ipvti->ipvti_mask |= IPVTI_ATTR_LOCAL; + + return 0; +} + +/** + * Get IPVTI tunnel local address + * @arg link Link object + * + * @return local address + */ +uint32_t rtnl_link_ipvti_get_local(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + return ipvti->local; +} + +/** + * Set IPVTI tunnel remote address + * @arg link Link object + * @arg remote remote address + * + * @return 0 on success or a negative error code + */ +int rtnl_link_ipvti_set_remote(struct rtnl_link *link, uint32_t remote) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + ipvti->remote = remote; + ipvti->ipvti_mask |= IPVTI_ATTR_REMOTE; + + return 0; +} + +/** + * Get IPVTI tunnel remote address + * @arg link Link object + * + * @return remote address on success or a negative error code + */ +uint32_t rtnl_link_ipvti_get_remote(struct rtnl_link *link) +{ + struct ipvti_info *ipvti = link->l_info; + + IS_IPVTI_LINK_ASSERT(link); + + return ipvti->remote; +} + +static void __init ipvti_init(void) +{ + rtnl_link_register_info(&ipvti_info_ops); +} + +static void __exit ipvti_exit(void) +{ + rtnl_link_unregister_info(&ipvti_info_ops); +} |