/usr/include/libnl3/netlink/genl/mngt.h is in libnl-3-dev 3.2.27-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* netlink/genl/mngt.h Generic Netlink Management
*
* 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) 2003-2012 Thomas Graf <tgraf@suug.ch>
*/
#ifndef NETLINK_GENL_MNGT_H_
#define NETLINK_GENL_MNGT_H_
#include <netlink/netlink.h>
#include <netlink/attr.h>
#include <netlink/list.h>
#ifdef __cplusplus
extern "C" {
#endif
struct nl_cache_ops;
/**
* @ingroup genl_mngt
* @struct genl_info netlink/genl/mngt.h
*
* Informative structure passed on to message parser callbacks
*
* This structure is passed on to all message parser callbacks and contains
* information about the sender of the message as well as pointers to all
* relevant sections of the parsed message.
*
* @see genl_cmd::c_msg_parser
*/
struct genl_info
{
/** Socket address of sender */
struct sockaddr_nl * who;
/** Pointer to Netlink message header */
struct nlmsghdr * nlh;
/** Pointer to Generic Netlink message header */
struct genlmsghdr * genlhdr;
/** Pointer to user header */
void * userhdr;
/** Pointer to array of parsed attributes */
struct nlattr ** attrs;
};
/**
* @ingroup genl_mngt
* @struct genl_cmd netlink/genl/mngt.h
*
* Definition of a Generic Netlink command.
*
* This structure is used to define the list of available commands on the
* receiving side.
*
* @par Example:
* @code
* static struct genl_cmd foo_cmds[] = {
* {
* .c_id = FOO_CMD_NEW,
* .c_name = "NEWFOO" ,
* .c_maxattr = FOO_ATTR_MAX,
* .c_attr_policy = foo_policy,
* .c_msg_parser = foo_msg_parser,
* },
* {
* .c_id = FOO_CMD_DEL,
* .c_name = "DELFOO" ,
* },
* };
*
* static struct genl_ops my_genl_ops = {
* [...]
* .o_cmds = foo_cmds,
* .o_ncmds = ARRAY_SIZE(foo_cmds),
* };
* @endcode
*/
struct genl_cmd
{
/** Numeric command identifier (required) */
int c_id;
/** Human readable name (required) */
char * c_name;
/** Maximum attribute identifier that the command is prepared to handle. */
int c_maxattr;
/** Called whenever a message for this command is received */
int (*c_msg_parser)(struct nl_cache_ops *,
struct genl_cmd *,
struct genl_info *, void *);
/** Attribute validation policy, enforced before the callback is called */
struct nla_policy * c_attr_policy;
};
/**
* @ingroup genl_mngt
* @struct genl_ops netlink/genl/mngt.h
*
* Definition of a Generic Netlink family
*
* @par Example:
* @code
* static struct genl_cmd foo_cmds[] = {
* [...]
* };
*
* static struct genl_ops my_genl_ops = {
* .o_name = "foo",
* .o_hdrsize = sizeof(struct my_hdr),
* .o_cmds = foo_cmds,
* .o_ncmds = ARRAY_SIZE(foo_cmds),
* };
*
* if ((err = genl_register_family(&my_genl_ops)) < 0)
* // ERROR
* @endcode
*
* @see genl_cmd
*/
struct genl_ops
{
/** Length of user header */
unsigned int o_hdrsize;
/** Numeric identifier, automatically filled in by genl_ops_resolve() */
int o_id;
/** Human readable name, used by genl_ops_resolve() to resolve numeric id */
char * o_name;
/**
* If registered via genl_register(), will point to the related
* cache operations.
*/
struct nl_cache_ops * o_cache_ops;
/** Optional array defining the available Generic Netlink commands */
struct genl_cmd * o_cmds;
/** Number of elements in \c o_cmds array */
int o_ncmds;
/**
* @private
* Used internally to link together all registered operations.
*/
struct nl_list_head o_list;
};
extern int genl_register_family(struct genl_ops *);
extern int genl_unregister_family(struct genl_ops *);
extern int genl_handle_msg(struct nl_msg *, void *);
extern int genl_register(struct nl_cache_ops *);
extern void genl_unregister(struct nl_cache_ops *);
extern int genl_ops_resolve(struct nl_sock *, struct genl_ops *);
extern int genl_mngt_resolve(struct nl_sock *);
#ifdef __cplusplus
}
#endif
#endif
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