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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 RTNL_H_
#define RTNL_H_
#include <linux/netlink.h>
#include <vppinfra/clib.h>
typedef enum {
RTNL_ERR_UNKNOWN,
} rtnl_error_t;
#define RTNL_NETNS_NAMELEN 31
/*
* RTNL stream implements an RTNL overlay
* for receiving continuous updates for a given namespace.
* When the stream is initially opened, dump requests are sent
* in order to retrieve the original state.
* handle_error is called any time synchronization cannot be
* achieved. When called, state is reset to its original state and
* new dump requests are sent.
*/
typedef struct rtnl_stream_s {
char name[RTNL_NETNS_NAMELEN + 1];
void (*recv_message)(struct nlmsghdr *hdr, uword opaque);
void (*error)(rtnl_error_t err, uword opaque);
uword opaque;
} rtnl_stream_t;
u32 rtnl_stream_open(rtnl_stream_t *template);
void rtnl_stream_close(u32 handle);
/*
* Executes a function in a synchronously executed thread in the
* given namespace.
* Returns 0 on success, and -errno on error.
*/
int rtnl_exec_in_namespace(u32 handle, void *(*fn)(void *), void *arg, void **ret);
int rtnl_exec_in_namespace_by_name(char *nsname, void *(*fn)(void *), void *arg, void **ret);
#endif
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