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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef NETNS_H_
#define NETNS_H_
#include <vlib/vlib.h>
#include <sys/socket.h>
#include <linux/rtnetlink.h>
#include <linux/netlink.h>
#include <net/if.h>
#include <librtnl/rtnl.h>
/*include it for 'struct mpls_label'*/
#include <linux/mpls.h>
/*so far depth is fixed, looking into ways to be dynamic*/
#define MPLS_STACK_DEPTH 7
typedef struct {
struct ifinfomsg ifi;
u8 hwaddr[IFHWADDRLEN];
u8 broadcast[IFHWADDRLEN];
u8 ifname[IFNAMSIZ];
u32 mtu;
u32 master;
u8 qdisc[IFNAMSIZ];
struct rtnl_link_stats stats; //This struct is big and only comes as a response to a request
f64 last_updated;
} ns_link_t;
typedef struct {
struct rtmsg rtm;
u8 dst[16];
u8 src[16];
u8 via[16];
u8 prefsrc[16];
u32 iif;
u32 oif;
u32 table;
u8 gateway[16];
u32 priority;
struct rta_cacheinfo cacheinfo;
struct mpls_label encap[MPLS_STACK_DEPTH];
f64 last_updated;
} ns_route_t;
typedef struct {
struct ifaddrmsg ifaddr;
u8 addr[16];
u8 local[16];
u8 label[IFNAMSIZ];
u8 broadcast[16];
u8 anycast[16];
struct ifa_cacheinfo cacheinfo;
f64 last_updated;
} ns_addr_t;
typedef struct {
struct ndmsg nd;
u8 dst[16];
u8 lladdr[IFHWADDRLEN];
u32 probes;
struct nda_cacheinfo cacheinfo;
f64 last_updated;
} ns_neigh_t;
typedef struct {
char name[RTNL_NETNS_NAMELEN + 1];
ns_link_t *links;
ns_route_t *routes;
ns_addr_t *addresses;
ns_neigh_t *neighbors;
} netns_t;
typedef enum {
NETNS_TYPE_LINK,
NETNS_TYPE_ROUTE,
NETNS_TYPE_ADDR,
NETNS_TYPE_NEIGH,
} netns_type_t;
//Flags used in notification functions call
#define NETNS_F_ADD 0x01
#define NETNS_F_DEL 0x02
typedef struct {
void (*notify)(void *obj, netns_type_t type, u32 flags, uword opaque);
uword opaque;
} netns_sub_t;
/*
* Subscribe for events related to the given namespace.
* When another subscriber already uses the namespace,
* this call will not trigger updates for already
* existing routes (This is to protect against
* synch. Vs asynch. issues).
*/
u32 netns_open(char *name, netns_sub_t *sub);
/*
* Retrieves the namespace structure associated with a
* given namespace handler.
*/
netns_t *netns_getns(u32 handle);
/*
* Terminates a subscriber session.
*/
void netns_close(u32 handle);
/*
* Calls the callback associated with the handle
* for all existing objects with the flags
* set to (del?NETNS_F_DEL:NETNS_F_ADD).
*/
void netns_callme(u32 handle, char del);
/*
* netns struct format functions.
* Taking the struct as single argument.
*/
u8 *format_ns_neigh(u8 *s, va_list *args);
u8 *format_ns_addr(u8 *s, va_list *args);
u8 *format_ns_route(u8 *s, va_list *args);
u8 *format_ns_link(u8 *s, va_list *args);
u8 *format_ns_object(u8 *s, va_list *args);
u8 *format_ns_flags(u8 *s, va_list *args);
#endif
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