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/*
* wprobe.h: Wireless probe user space library
* Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __WPROBE_USER_H
#define __WPROBE_USER_H
#include <inttypes.h>
#include <stdint.h>
#include <stdbool.h>
#include "list.h"
/**
* struct wprobe_value: data structure for attribute values
* @STRING: string value (currently unsupported)
* @U8: unsigned 8-bit integer value
* @U16: unsigned 16-bit integer value
* @U32: unsigned 32-bit integer value
* @U64: unsigned 64-bit integer value
* @S8: signed 8-bit integer value
* @S16: signed 16-bit integer value
* @S32: signed 32-bit integer value
* @S64: signed 64-bit integer value
*
* @n: number of sample values
* @avg: average value
* @stdev: standard deviation
* @s: sum of all sample values (internal use)
* @ss: sum of all sample values squared (internal use)
*/
struct wprobe_value {
/* attribute value */
union {
const char *STRING;
uint8_t U8;
uint16_t U16;
uint32_t U32;
uint64_t U64;
int8_t S8;
int16_t S16;
int32_t S32;
int64_t S64;
};
/* statistics */
int64_t s, ss;
float avg, stdev;
unsigned int n;
};
/**
* struct wprobe_attribute: data structures for attribute descriptions
* @list: linked list data structure for a list of attributes
* @id: attribute id
* @type: netlink type for the attribute (see kernel api documentation)
* @flags: attribute flags (see kernel api documentation)
* @val: cached version of the last netlink query, will be overwritten on each request
* @name: attribute name
*/
struct wprobe_attribute {
struct list_head list;
int id;
int type;
uint32_t flags;
struct wprobe_value val;
char name[];
};
/**
* struct wprobe_link: data structure for the link description
* @list: linked list data structure for a list of links
* @flags: link flags (see kernel api documentation)
* @addr: mac address of the remote link partner
*/
struct wprobe_link {
struct list_head list;
uint32_t flags;
unsigned char addr[6];
};
struct wprobe_filter_item {
char name[32];
uint64_t rx;
uint64_t tx;
};
struct wprobe_iface_ops;
struct wprobe_iface {
const struct wprobe_iface_ops *ops;
int sockfd;
const char *ifname;
unsigned int genl_family;
char addr[6];
struct list_head global_attr;
struct list_head link_attr;
struct list_head links;
/* config */
int interval;
int scale_min;
int scale_max;
int scale_m;
int scale_d;
/* filter */
void *filter;
/* filter_len:
* set to -1 to drop the current filter
* automatically reset to 0 after config apply
*/
int filter_len;
};
typedef void (*wprobe_filter_cb)(void *arg, const char *group, struct wprobe_filter_item *items, int n_items);
extern int wprobe_port;
/**
* wprobe_update_links: get a list of all link partners
* @dev: wprobe device structure
* @list: linked list for storing link descriptions
*
* when wprobe_update_links is called multiple times, the linked list
* is updated with new link partners, old entries are automatically expired
*/
extern int wprobe_update_links(struct wprobe_iface *dev);
/**
* wprobe_dump_filters: dump all layer 2 filter counters
* @dev: wprobe device structure
* @cb: callback (called once per filter group)
* @arg: user argument for the callback
*/
extern int wprobe_dump_filters(struct wprobe_iface *dev, wprobe_filter_cb cb, void *arg);
/**
* wprobe_measure: start a measurement request for all global attributes
* @dev: wprobe device structure
*
* not all attributes are automatically filled with data, since for some
* it may be desirable to control the sampling interval from user space
* you can use this function to do that.
*/
extern int wprobe_measure(struct wprobe_iface *dev);
/**
* wprobe_get_dev: get a handle to a local wprobe device
* @ifname: name of the wprobe interface
*
* queries the wprobe interface for all attributes
* must be freed with wprobe_free_dev
*/
extern struct wprobe_iface *wprobe_get_dev(const char *ifname);
/**
* wprobe_get_auto: get a handle to a local or remote wprobe device
* @arg: pointer to the wprobe device, either <dev> (local) or <host>:<dev> (remote)
*/
extern struct wprobe_iface *wprobe_get_auto(const char *arg, char **err);
/**
* wprobe_get_dev: free all device information
* @dev: wprobe device structure
*/
extern void wprobe_free_dev(struct wprobe_iface *dev);
/**
* wprobe_apply_config: apply configuration data
* @dev: wprobe device structure
*
* uploads all configuration values from @dev that are not set to -1
*/
extern int wprobe_apply_config(struct wprobe_iface *dev);
/**
* wprobe_request_data: request new sampling values for the given list of attributes
* @dev: wprobe device structure
* @addr: (optional) mac address of the link partner
*
* if addr is unset, global values are stored in the global attributes list
* if addr is set, per-link values for the given address are stored in the link attributes list
*/
extern int wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr);
/**
* wprobe_server_init: send a wprobe server init message to a server's client socket
* @socket: socket of the connection to the client
*/
extern int wprobe_server_init(int socket);
/**
* wprobe_server_handle: read a request from the client socket, process it, send the response
* @socket: socket of the connection to the client
*/
extern int wprobe_server_handle(int socket);
/**
* wprobe_server_done: release memory allocated for the server connection
*/
extern void wprobe_server_done(void);
#endif
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