378 lines
14 KiB
C
378 lines
14 KiB
C
/*
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* Copyright (c) 2016-2017, Marie Helene Kvello-Aune
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* thislist of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <sys/types.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/ip_carp.h>
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#include <netinet6/in6_var.h>
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#define ND6_IFF_DEFAULTIF 0x8000
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typedef enum {
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OK = 0,
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OTHER,
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IOCTL,
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SOCKET,
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NETLINK
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} ifconfig_errtype;
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/*
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* Opaque definition so calling application can just pass a
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* pointer to it for library use.
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*/
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struct ifconfig_handle;
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typedef struct ifconfig_handle ifconfig_handle_t;
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struct ifaddrs;
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struct ifbropreq;
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struct ifbreq;
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struct in6_ndireq;
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struct lagg_reqall;
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struct lagg_reqflags;
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struct lagg_reqopts;
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struct lagg_reqport;
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/** Stores extra info associated with a bridge(4) interface */
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struct ifconfig_bridge_status {
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struct ifbropreq *params; /**< current operational parameters */
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struct ifbreq *members; /**< list of bridge members */
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size_t members_count; /**< how many member interfaces */
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uint32_t cache_size; /**< size of address cache */
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uint32_t cache_lifetime; /**< address cache entry lifetime */
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};
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struct ifconfig_capabilities {
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/** Current capabilities (ifconfig prints this as 'options')*/
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int curcap;
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/** Requested capabilities (ifconfig prints this as 'capabilities')*/
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int reqcap;
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};
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/** Stores extra info associated with an inet address */
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struct ifconfig_inet_addr {
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const struct sockaddr_in *sin;
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const struct sockaddr_in *netmask;
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const struct sockaddr_in *dst;
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const struct sockaddr_in *broadcast;
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int prefixlen;
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uint8_t vhid;
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};
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/** Stores extra info associated with an inet6 address */
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struct ifconfig_inet6_addr {
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struct sockaddr_in6 *sin6;
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struct sockaddr_in6 *dstin6;
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struct in6_addrlifetime lifetime;
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int prefixlen;
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uint32_t flags;
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uint8_t vhid;
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};
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/** Stores extra info associated with a lagg(4) interface */
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struct ifconfig_lagg_status {
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struct lagg_reqall *ra;
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struct lagg_reqopts *ro;
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struct lagg_reqflags *rf;
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};
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/** Retrieves a new state object for use in other API calls.
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* Example usage:
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*{@code
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* // Create state object
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* ifconfig_handle_t *lifh;
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* lifh = ifconfig_open();
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* if (lifh == NULL) {
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* // Handle error
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* }
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*
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* // Do stuff with the handle
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*
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* // Dispose of the state object
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* ifconfig_close(lifh);
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* lifh = NULL;
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*}
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*/
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ifconfig_handle_t *ifconfig_open(void);
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/** Frees resources held in the provided state object.
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* @param h The state object to close.
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* @see #ifconfig_open(void)
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*/
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void ifconfig_close(ifconfig_handle_t *h);
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/** Identifies what kind of error occurred. */
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ifconfig_errtype ifconfig_err_errtype(ifconfig_handle_t *h);
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/** Retrieves the errno associated with the error, if any. */
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int ifconfig_err_errno(ifconfig_handle_t *h);
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typedef void (*ifconfig_foreach_func_t)(ifconfig_handle_t *h,
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struct ifaddrs *ifa, void *udata);
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/** Iterate over every network interface
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* @param h An open ifconfig state object
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* @param cb A callback function to call with a pointer to each interface
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* @param udata An opaque value that will be passed to the callback.
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* @return 0 on success, nonzero if the list could not be iterated
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*/
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int ifconfig_foreach_iface(ifconfig_handle_t *h, ifconfig_foreach_func_t cb,
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void *udata);
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/** Iterate over every address on a single network interface
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* @param h An open ifconfig state object
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* @param ifa A pointer that was supplied by a previous call to
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* ifconfig_foreach_iface
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* @param udata An opaque value that will be passed to the callback.
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* @param cb A callback function to call with a pointer to each ifaddr
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*/
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void ifconfig_foreach_ifaddr(ifconfig_handle_t *h, struct ifaddrs *ifa,
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ifconfig_foreach_func_t cb, void *udata);
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/** If error type was IOCTL, this identifies which request failed. */
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unsigned long ifconfig_err_ioctlreq(ifconfig_handle_t *h);
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int ifconfig_get_description(ifconfig_handle_t *h, const char *name,
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char **description);
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int ifconfig_set_description(ifconfig_handle_t *h, const char *name,
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const char *newdescription);
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int ifconfig_unset_description(ifconfig_handle_t *h, const char *name);
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int ifconfig_set_name(ifconfig_handle_t *h, const char *name,
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const char *newname);
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int ifconfig_get_orig_name(ifconfig_handle_t *h, const char *ifname,
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char **orig_name);
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int ifconfig_set_fib(ifconfig_handle_t *h, const char *name, int fib);
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int ifconfig_get_fib(ifconfig_handle_t *h, const char *name, int *fib);
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int ifconfig_set_mtu(ifconfig_handle_t *h, const char *name, const int mtu);
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int ifconfig_get_mtu(ifconfig_handle_t *h, const char *name, int *mtu);
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int ifconfig_get_nd6(ifconfig_handle_t *h, const char *name,
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struct in6_ndireq *nd);
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int ifconfig_set_metric(ifconfig_handle_t *h, const char *name,
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const int metric);
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int ifconfig_get_metric(ifconfig_handle_t *h, const char *name, int *metric);
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int ifconfig_set_capability(ifconfig_handle_t *h, const char *name,
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const int capability);
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int ifconfig_get_capability(ifconfig_handle_t *h, const char *name,
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struct ifconfig_capabilities *capability);
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/** Retrieve the list of groups to which this interface belongs
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* @param h An open ifconfig state object
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* @param name The interface name
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* @param ifgr return argument. The caller is responsible for freeing
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* ifgr->ifgr_groups
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* @return 0 on success, nonzero on failure
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*/
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int ifconfig_get_groups(ifconfig_handle_t *h, const char *name,
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struct ifgroupreq *ifgr);
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int ifconfig_get_ifstatus(ifconfig_handle_t *h, const char *name,
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struct ifstat *stat);
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/** Retrieve the interface media information
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* @param h An open ifconfig state object
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* @param name The interface name
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* @param ifmr Return argument. The caller is responsible for freeing it
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* @return 0 on success, nonzero on failure
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*/
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int ifconfig_media_get_mediareq(ifconfig_handle_t *h, const char *name,
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struct ifmediareq **ifmr);
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const char *ifconfig_media_get_status(const struct ifmediareq *ifmr);
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typedef int ifmedia_t;
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#define INVALID_IFMEDIA ((ifmedia_t)-1)
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/** Retrieve the name of a media type
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* @param media The media to be named
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* @return A pointer to the media type name, or NULL on failure
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*/
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const char *ifconfig_media_get_type(ifmedia_t media);
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/** Retrieve a media type by its name
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* @param name The name of a media type
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* @return The media type value, or INVALID_IFMEDIA on failure
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*/
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ifmedia_t ifconfig_media_lookup_type(const char *name);
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/** Retrieve the name of a media subtype
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* @param media The media subtype to be named
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* @return A pointer to the media subtype name, or NULL on failure
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*/
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const char *ifconfig_media_get_subtype(ifmedia_t media);
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/** Retrieve a media subtype by its name
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* @param media The top level media type whose subtype we want
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* @param name The name of a media subtype
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* @return The media subtype value, or INVALID_IFMEDIA on failure
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*/
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ifmedia_t ifconfig_media_lookup_subtype(ifmedia_t media, const char *name);
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/** Retrieve the name of a media mode
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* @param media The media mode to be named
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* @return A pointer to the media mode name, or NULL on failure
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*/
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const char *ifconfig_media_get_mode(ifmedia_t media);
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/** Retrieve a media mode by its name
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* @param media The top level media type whose mode we want
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* @param name The name of a media mode
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* @return The media mode value, or INVALID_IFMEDIA on failure
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*/
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ifmedia_t ifconfig_media_lookup_mode(ifmedia_t media, const char *name);
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/** Retrieve an array of media options
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* @param media The media for which to obtain the options
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* @return Pointer to an array of pointers to option names,
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* terminated by a NULL pointer, or simply NULL on failure.
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* The caller is responsible for freeing the array but not its
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* contents.
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*/
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const char **ifconfig_media_get_options(ifmedia_t media);
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/** Retrieve an array of media options by names
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* @param media The top level media type whose options we want
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* @param opts Pointer to an array of string pointers naming options
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* @param nopts Number of elements in the opts array
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* @return Pointer to an array of media options, one for each option named
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* in opts. NULL is returned instead with errno set to ENOMEM if
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* allocating the return array fails or EINVAL if media is not
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* valid. A media option in the array will be INVALID_IFMEDIA
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* when lookup failed for the option named in that position in
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* opts. The caller is responsible for freeing the array.
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*/
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ifmedia_t *ifconfig_media_lookup_options(ifmedia_t media, const char **opts,
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size_t nopts);
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/** Retrieve the reason the interface is down
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* @param h An open ifconfig state object
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* @param name The interface name
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* @param ifdr Return argument.
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* @return 0 on success, nonzero on failure
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*/
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int ifconfig_media_get_downreason(ifconfig_handle_t *h, const char *name,
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struct ifdownreason *ifdr);
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struct ifconfig_carp {
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size_t carpr_count;
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uint32_t carpr_vhid;
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uint32_t carpr_state;
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int32_t carpr_advbase;
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int32_t carpr_advskew;
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uint8_t carpr_key[CARP_KEY_LEN];
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struct in_addr carpr_addr;
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struct in6_addr carpr_addr6;
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};
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int ifconfig_carp_get_vhid(ifconfig_handle_t *h, const char *name,
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struct ifconfig_carp *carpr, uint32_t vhid);
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int ifconfig_carp_get_info(ifconfig_handle_t *h, const char *name,
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struct ifconfig_carp *carpr, size_t ncarp);
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int ifconfig_carp_set_info(ifconfig_handle_t *h, const char *name,
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const struct ifconfig_carp *carpr);
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/** Retrieve additional information about an inet address
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* @param h An open ifconfig state object
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* @param name The interface name
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* @param ifa Pointer to the address structure of interest
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* @param addr Return argument. It will be filled with additional information
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* about the address.
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* @return 0 on success, nonzero on failure.
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*/
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int ifconfig_inet_get_addrinfo(ifconfig_handle_t *h,
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const char *name, struct ifaddrs *ifa, struct ifconfig_inet_addr *addr);
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/** Retrieve additional information about an inet6 address
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* @param h An open ifconfig state object
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* @param name The interface name
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* @param ifa Pointer to the address structure of interest
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* @param addr Return argument. It will be filled with additional information
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* about the address.
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* @return 0 on success, nonzero on failure.
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*/
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int ifconfig_inet6_get_addrinfo(ifconfig_handle_t *h,
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const char *name, struct ifaddrs *ifa, struct ifconfig_inet6_addr *addr);
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/** Retrieve additional information about a bridge(4) interface */
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int ifconfig_bridge_get_bridge_status(ifconfig_handle_t *h,
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const char *name, struct ifconfig_bridge_status **bridge);
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/** Frees the structure returned by ifconfig_bridge_get_bridge_status. Does
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* nothing if the argument is NULL
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* @param bridge Pointer to the structure to free
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*/
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void ifconfig_bridge_free_bridge_status(struct ifconfig_bridge_status *bridge);
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/** Retrieve additional information about a lagg(4) interface */
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int ifconfig_lagg_get_lagg_status(ifconfig_handle_t *h,
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const char *name, struct ifconfig_lagg_status **lagg_status);
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/** Retrieve additional information about a member of a lagg(4) interface */
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int ifconfig_lagg_get_laggport_status(ifconfig_handle_t *h,
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const char *name, struct lagg_reqport *rp);
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/** Frees the structure returned by ifconfig_lagg_get_lagg_status. Does
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* nothing if the argument is NULL
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* @param laggstat Pointer to the structure to free
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*/
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void ifconfig_lagg_free_lagg_status(struct ifconfig_lagg_status *laggstat);
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/** Destroy a virtual interface
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* @param name Interface to destroy
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*/
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int ifconfig_destroy_interface(ifconfig_handle_t *h, const char *name);
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/** Creates a (virtual) interface
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* @param name Name of interface to create. Example: bridge or bridge42
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* @param name ifname Is set to actual name of created interface
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*/
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int ifconfig_create_interface(ifconfig_handle_t *h, const char *name,
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char **ifname);
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/** Creates a (virtual) interface
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* @param name Name of interface to create. Example: vlan0 or ix0.50
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* @param name ifname Is set to actual name of created interface
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* @param vlandev Name of interface to attach to
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* @param vlanid VLAN ID/Tag. Must not be 0.
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*/
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int ifconfig_create_interface_vlan(ifconfig_handle_t *h, const char *name,
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char **ifname, const char *vlandev, const unsigned short vlantag);
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int ifconfig_set_vlantag(ifconfig_handle_t *h, const char *name,
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const char *vlandev, const unsigned short vlantag);
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/** Gets the names of all interface cloners available on the system
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* @param bufp Set to the address of the names buffer on success or NULL
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* if an error occurs. This buffer must be freed when done.
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* @param lenp Set to the number of names in the returned buffer or 0
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* if an error occurs. Each name is contained within an
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* IFNAMSIZ length slice of the buffer, for a total buffer
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* length of *lenp * IFNAMSIZ bytes.
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*/
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int ifconfig_list_cloners(ifconfig_handle_t *h, char **bufp, size_t *lenp);
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