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ipvti: introduce vti tunnel support

Browse Source 
Signed-off-by: Susant Sahani <susant@redhat.com>
[thaller@redhat.com: some whitespace fixes]
Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Susant Sahani 2014-05-06 11:11:30 +05:30 committed by Thomas Haller
parent adb9f5d8fa
commit 8f6301426a
7 changed files with 638 additions and 1 deletions
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60
doc/route.txt
View File

@ -1081,6 +1081,66 @@ rtnl_link_put(link);
-----
[[link_ipvti]]
==== IPVTI
[source,c]
-----
extern struct rtnl_link *rtnl_link_ipvti_alloc(void);
extern int rtnl_link_ipvti_add(struct nl_sock *sk, const char *name);
extern int rtnl_link_ipvti_set_link(struct rtnl_link *link, uint32_t index);
extern uint32_t rtnl_link_ipvti_get_link(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_ikey(struct rtnl_link *link, uint32_t ikey);
extern uint32_t rtnl_link_get_ikey(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_okey(struct rtnl_link *link, uint32_t okey);
extern uint32_t rtnl_link_get_okey(struct rtnl_link *link)
extern int rtnl_link_ipvti_set_local(struct rtnl_link *link, uint32_t addr);
extern uint32_t rtnl_link_ipvti_get_local(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_remote(struct rtnl_link *link, uint32_t addr);
extern uint32_t rtnl_link_ipvti_get_remote(struct rtnl_link *link);
-----
.Example: Add a ipvti tunnel device
[source,c]
-----
struct rtnl_link *link
struct in_addr addr
/* allocate new link object of type vxlan */
if(!(link = rtnl_link_ipvti_alloc()))
/* error */
/* set ipvti tunnel name */
if ((err = rtnl_link_set_name(link, "ipvti-tun")) < 0)
/* error */
/* set link index */
if ((err = rtnl_link_ipvti_set_link(link, if_index)) < 0)
/* error */
/* set local address */
inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
if ((err = rtnl_link_ipvti_set_local(link, addr.s_addr)) < 0)
/* error */
/* set remote address */
inet_pton(AF_INET, "192.168.254.13", &addr.s_addr
if ((err = rtnl_link_ipvti_set_remote(link, addr.s_addr)) < 0)
/* error */
if((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0)
/* error */
rtnl_link_put(link);
-----
== Neighbouring
== Routing

1
include/Makefile.am
View File

@ -55,6 +55,7 @@ nobase_libnlinclude_HEADERS = \
netlink/route/link/veth.h \
netlink/route/link/ipgre.h \
netlink/route/link/ipip.h \
netlink/route/link/ipvti.h \
netlink/route/link/sit.h \
netlink/route/qdisc/cbq.h \
netlink/route/qdisc/dsmark.h \

43
include/netlink/route/link/ipvti.h Normal file
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@ -0,0 +1,43 @@
/*
* netlink/route/link/ipvti.h IPVTI interface
*
* 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>
*/
#ifndef NETLINK_LINK_IPVTI_H_
#define NETLINK_LINK_IPVTI_H_
#include <netlink/netlink.h>
#include <netlink/route/link.h>
#ifdef __cplusplus
extern "C" {
#endif
extern struct rtnl_link *rtnl_link_ipvti_alloc(void);
extern int rtnl_link_ipvti_add(struct nl_sock *sk, const char *name);
extern int rtnl_link_ipvti_set_link(struct rtnl_link *link, uint32_t index);
extern uint32_t rtnl_link_ipvti_get_link(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_ikey(struct rtnl_link *link, uint32_t ikey);
extern uint32_t rtnl_link_get_ikey(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_okey(struct rtnl_link *link, uint32_t okey);
extern uint32_t rtnl_link_get_okey(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_local(struct rtnl_link *link, uint32_t addr);
extern uint32_t rtnl_link_get_local(struct rtnl_link *link);
extern int rtnl_link_ipvti_set_remote(struct rtnl_link *link, uint32_t addr);
extern uint32_t rtnl_link_get_remote(struct rtnl_link *link);
#ifdef __cplusplus
}
#endif
#endif

2
lib/Makefile.am
View File

@ -79,7 +79,7 @@ libnl_route_3_la_SOURCES = \
route/link/bridge.c route/link/inet6.c route/link/inet.c \
route/link/bonding.c route/link/can.c route/link/macvlan.c \
route/link/vxlan.c route/link/veth.c route/link/ipip.c \
route/link/ipgre.c route/link/sit.c\
route/link/ipgre.c route/link/sit.c route/link/ipvti.c\
\
route/qdisc/blackhole.c route/qdisc/cbq.c route/qdisc/dsmark.c \
route/qdisc/fifo.c route/qdisc/htb.c route/qdisc/netem.c \

477
lib/route/link/ipvti.c Normal file
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@ -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);
}

1
tests/Makefile.am
View File

@ -26,6 +26,7 @@ check_PROGRAMS = \
test-create-bridge \
test-create-ipgre \
test-create-ipip \
test-create-ipvti \
test-create-sit \
test-delete-link \
test-socket-creation \

55
tests/test-create-ipvti.c Normal file
View File

@ -0,0 +1,55 @@
#include <netlink/route/link/ipvti.h>
#include <netlink-private/netlink.h>
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link;
struct in_addr addr;
struct nl_sock *sk;
int err, if_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache);
if ( err < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if_index = rtnl_link_name2i(link_cache, "ens33");
if (!if_index) {
fprintf(stderr, "Unable to lookup ens33");
return -1;
}
link = rtnl_link_ipvti_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "ipvti-tun");
rtnl_link_ipvti_set_link(link, if_index);
inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
rtnl_link_ipvti_set_local(link, addr.s_addr);
inet_pton(AF_INET, "192.168.254.13", &addr.s_addr);
rtnl_link_ipvti_set_remote(link, addr.s_addr);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
if (err < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}