xref: /freebsd/lib/libifconfig/libifconfig.h (revision 9a2ff3154b811a8210a7eca5531e233c69ed5924)

/*
 * Copyright (c) 2016, Marie Helene Kvello-Aune
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * thislist of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#pragma once

typedef enum {
	OTHER, IOCTL, SOCKET
} ifconfig_errtype;

/*
 * Opaque definition so calling application can just pass a
 * pointer to it for library use.
 */
struct ifconfig_handle;
typedef struct ifconfig_handle   ifconfig_handle_t;

struct ifconfig_capabilities {
	/** Current capabilities (ifconfig prints this as 'options')*/
	int curcap;
	/** Requested capabilities (ifconfig prints this as 'capabilities')*/
	int reqcap;
};

/** Retrieves a new state object for use in other API calls.
 * Example usage:
 *{@code
 * // Create state object
 * ifconfig_handle_t *lifh = ifconfig_open();
 *
 * // Do stuff with it
 *
 * // Dispose of the state object
 * ifconfig_close(lifh);
 * lifh = NULL;
 *}
 */
ifconfig_handle_t *ifconfig_open(void);

/** Frees resources held in the provided state object.
 * @param h The state object to close.
 * @see #ifconfig_open(void)
 */
void ifconfig_close(ifconfig_handle_t *h);

/** Identifies what kind of error occured. */
ifconfig_errtype ifconfig_err_errtype(ifconfig_handle_t *h);

/** Retrieves the errno associated with the error, if any. */
int ifconfig_err_errno(ifconfig_handle_t *h);

/** If error type was IOCTL, this identifies which request failed. */
unsigned long ifconfig_err_ioctlreq(ifconfig_handle_t *h);
int ifconfig_get_description(ifconfig_handle_t *h, const char *name,
    char **description);
int ifconfig_set_description(ifconfig_handle_t *h, const char *name,
    const char *newdescription);
int ifconfig_unset_description(ifconfig_handle_t *h, const char *name);
int ifconfig_set_name(ifconfig_handle_t *h, const char *name,
    const char *newname);
int ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu);
int ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu);
int ifconfig_set_metric(ifconfig_handle_t *h, const char *name,
    const int metric);
int ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric);
int ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
    const int capability);
int ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
    struct ifconfig_capabilities *capability);

/** Destroy a virtual interface
 * @param name Interface to destroy
 */
int ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name);

/** Creates a (virtual) interface
 * @param name Name of interface to create. Example: bridge or bridge42
 * @param name ifname Is set to actual name of created interface
 */
int ifconfig_create_interface(ifconfig_handle_t *h, const char *name,
    char **ifname);