libvirt/src/libvirt-network.c
Laine Stump e983e62514 debug: assure NULLSTR() around all %s args in debug at top of public APIs
There are also a couple that were very uninformatively just logging
the value of the pointer rather than the string itself:

* the "name" arg to virNodeDeviceLookupByName()
* wwnn and wwpn args to virNodeDeviceLookupSCSIHostByWWN()

All char*'s that make sense should now have their contents logged
rather than the pointer, and all %s args should now be inside
NULLSTR().
2015-05-28 13:13:45 -04:00

1253 lines
33 KiB
C

/*
* libvirt-network.c: entry points for virNetworkPtr APIs
*
* Copyright (C) 2006-2015 Red Hat, Inc.
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "datatypes.h"
#include "viralloc.h"
#include "virlog.h"
VIR_LOG_INIT("libvirt.network");
#define VIR_FROM_THIS VIR_FROM_NETWORK
/**
* virNetworkGetConnect:
* @net: pointer to a network
*
* Provides the connection pointer associated with a network. The
* reference counter on the connection is not increased by this
* call.
*
* WARNING: When writing libvirt bindings in other languages, do
* not use this function. Instead, store the connection and
* the network object together.
*
* Returns the virConnectPtr or NULL in case of failure.
*/
virConnectPtr
virNetworkGetConnect(virNetworkPtr net)
{
VIR_DEBUG("net=%p", net);
virResetLastError();
virCheckNetworkReturn(net, NULL);
return net->conn;
}
/**
* virConnectListAllNetworks:
* @conn: Pointer to the hypervisor connection.
* @nets: Pointer to a variable to store the array containing the network
* objects or NULL if the list is not required (just returns number
* of networks).
* @flags: bitwise-OR of virConnectListAllNetworksFlags.
*
* Collect the list of networks, and allocate an array to store those
* objects. This API solves the race inherent between virConnectListNetworks
* and virConnectListDefinedNetworks.
*
* Normally, all networks are returned; however, @flags can be used to
* filter the results for a smaller list of targeted networks. The valid
* flags are divided into groups, where each group contains bits that
* describe mutually exclusive attributes of a network, and where all bits
* within a group describe all possible networks.
*
* The first group of @flags is VIR_CONNECT_LIST_NETWORKS_ACTIVE (up) and
* VIR_CONNECT_LIST_NETWORKS_INACTIVE (down) to filter the networks by state.
*
* The second group of @flags is VIR_CONNECT_LIST_NETWORKS_PERSISTENT (defined)
* and VIR_CONNECT_LIST_NETWORKS_TRANSIENT (running but not defined), to filter
* the networks by whether they have persistent config or not.
*
* The third group of @flags is VIR_CONNECT_LIST_NETWORKS_AUTOSTART
* and VIR_CONNECT_LIST_NETWORKS_NO_AUTOSTART, to filter the networks by
* whether they are marked as autostart or not.
*
* Returns the number of networks found or -1 and sets @nets to NULL in case
* of error. On success, the array stored into @nets is guaranteed to have an
* extra allocated element set to NULL but not included in the return count,
* to make iteration easier. The caller is responsible for calling
* virNetworkFree() on each array element, then calling free() on @nets.
*/
int
virConnectListAllNetworks(virConnectPtr conn,
virNetworkPtr **nets,
unsigned int flags)
{
VIR_DEBUG("conn=%p, nets=%p, flags=%x", conn, nets, flags);
virResetLastError();
if (nets)
*nets = NULL;
virCheckConnectReturn(conn, -1);
if (conn->networkDriver &&
conn->networkDriver->connectListAllNetworks) {
int ret;
ret = conn->networkDriver->connectListAllNetworks(conn, nets, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectNumOfNetworks:
* @conn: pointer to the hypervisor connection
*
* Provides the number of active networks.
*
* Returns the number of network found or -1 in case of error
*/
int
virConnectNumOfNetworks(virConnectPtr conn)
{
VIR_DEBUG("conn=%p", conn);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (conn->networkDriver && conn->networkDriver->connectNumOfNetworks) {
int ret;
ret = conn->networkDriver->connectNumOfNetworks(conn);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectListNetworks:
* @conn: pointer to the hypervisor connection
* @names: array to collect the list of names of active networks
* @maxnames: size of @names
*
* Collect the list of active networks, and store their names in @names
*
* For more control over the results, see virConnectListAllNetworks().
*
* Returns the number of networks found or -1 in case of error. Note that
* this command is inherently racy; a network can be started between a call
* to virConnectNumOfNetworks() and this call; you are only guaranteed that
* all currently active networks were listed if the return is less than
* @maxnames. The client must call free() on each returned name.
*/
int
virConnectListNetworks(virConnectPtr conn, char **const names, int maxnames)
{
VIR_DEBUG("conn=%p, names=%p, maxnames=%d", conn, names, maxnames);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(names, error);
virCheckNonNegativeArgGoto(maxnames, error);
if (conn->networkDriver && conn->networkDriver->connectListNetworks) {
int ret;
ret = conn->networkDriver->connectListNetworks(conn, names, maxnames);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectNumOfDefinedNetworks:
* @conn: pointer to the hypervisor connection
*
* Provides the number of inactive networks.
*
* Returns the number of networks found or -1 in case of error
*/
int
virConnectNumOfDefinedNetworks(virConnectPtr conn)
{
VIR_DEBUG("conn=%p", conn);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (conn->networkDriver && conn->networkDriver->connectNumOfDefinedNetworks) {
int ret;
ret = conn->networkDriver->connectNumOfDefinedNetworks(conn);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectListDefinedNetworks:
* @conn: pointer to the hypervisor connection
* @names: pointer to an array to store the names
* @maxnames: size of the array
*
* list the inactive networks, stores the pointers to the names in @names
*
* For more control over the results, see virConnectListAllNetworks().
*
* Returns the number of names provided in the array or -1 in case of error.
* Note that this command is inherently racy; a network can be defined between
* a call to virConnectNumOfDefinedNetworks() and this call; you are only
* guaranteed that all currently defined networks were listed if the return
* is less than @maxnames. The client must call free() on each returned name.
*/
int
virConnectListDefinedNetworks(virConnectPtr conn, char **const names,
int maxnames)
{
VIR_DEBUG("conn=%p, names=%p, maxnames=%d", conn, names, maxnames);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(names, error);
virCheckNonNegativeArgGoto(maxnames, error);
if (conn->networkDriver && conn->networkDriver->connectListDefinedNetworks) {
int ret;
ret = conn->networkDriver->connectListDefinedNetworks(conn, names, maxnames);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virNetworkLookupByName:
* @conn: pointer to the hypervisor connection
* @name: name for the network
*
* Try to lookup a network on the given hypervisor based on its name.
*
* virNetworkFree should be used to free the resources after the
* network object is no longer needed.
*
* Returns a new network object or NULL in case of failure. If the
* network cannot be found, then VIR_ERR_NO_NETWORK error is raised.
*/
virNetworkPtr
virNetworkLookupByName(virConnectPtr conn, const char *name)
{
VIR_DEBUG("conn=%p, name=%s", conn, NULLSTR(name));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(name, error);
if (conn->networkDriver && conn->networkDriver->networkLookupByName) {
virNetworkPtr ret;
ret = conn->networkDriver->networkLookupByName(conn, name);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virNetworkLookupByUUID:
* @conn: pointer to the hypervisor connection
* @uuid: the raw UUID for the network
*
* Try to lookup a network on the given hypervisor based on its UUID.
*
* virNetworkFree should be used to free the resources after the
* network object is no longer needed.
*
* Returns a new network object or NULL in case of failure. If the
* network cannot be found, then VIR_ERR_NO_NETWORK error is raised.
*/
virNetworkPtr
virNetworkLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
{
VIR_UUID_DEBUG(conn, uuid);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(uuid, error);
if (conn->networkDriver && conn->networkDriver->networkLookupByUUID) {
virNetworkPtr ret;
ret = conn->networkDriver->networkLookupByUUID(conn, uuid);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virNetworkLookupByUUIDString:
* @conn: pointer to the hypervisor connection
* @uuidstr: the string UUID for the network
*
* Try to lookup a network on the given hypervisor based on its UUID.
*
* Returns a new network object or NULL in case of failure. If the
* network cannot be found, then VIR_ERR_NO_NETWORK error is raised.
*/
virNetworkPtr
virNetworkLookupByUUIDString(virConnectPtr conn, const char *uuidstr)
{
unsigned char uuid[VIR_UUID_BUFLEN];
VIR_DEBUG("conn=%p, uuidstr=%s", conn, NULLSTR(uuidstr));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(uuidstr, error);
if (virUUIDParse(uuidstr, uuid) < 0) {
virReportInvalidArg(uuidstr,
_("uuidstr in %s must be a valid UUID"),
__FUNCTION__);
goto error;
}
return virNetworkLookupByUUID(conn, &uuid[0]);
error:
virDispatchError(conn);
return NULL;
}
/**
* virNetworkCreateXML:
* @conn: pointer to the hypervisor connection
* @xmlDesc: an XML description of the network
*
* Create and start a new virtual network, based on an XML description
* similar to the one returned by virNetworkGetXMLDesc()
*
* virNetworkFree should be used to free the resources after the
* network object is no longer needed.
*
* Returns a new network object or NULL in case of failure
*/
virNetworkPtr
virNetworkCreateXML(virConnectPtr conn, const char *xmlDesc)
{
VIR_DEBUG("conn=%p, xmlDesc=%s", conn, NULLSTR(xmlDesc));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(xmlDesc, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->networkDriver && conn->networkDriver->networkCreateXML) {
virNetworkPtr ret;
ret = conn->networkDriver->networkCreateXML(conn, xmlDesc);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virNetworkDefineXML:
* @conn: pointer to the hypervisor connection
* @xml: the XML description for the network, preferably in UTF-8
*
* Define an inactive persistent virtual network or modify an existing
* persistent one from the XML description.
*
* virNetworkFree should be used to free the resources after the
* network object is no longer needed.
*
* Returns NULL in case of error, a pointer to the network otherwise
*/
virNetworkPtr
virNetworkDefineXML(virConnectPtr conn, const char *xml)
{
VIR_DEBUG("conn=%p, xml=%s", conn, NULLSTR(xml));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(xml, error);
if (conn->networkDriver && conn->networkDriver->networkDefineXML) {
virNetworkPtr ret;
ret = conn->networkDriver->networkDefineXML(conn, xml);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virNetworkUndefine:
* @network: pointer to a defined network
*
* Undefine a network but does not stop it if it is running
*
* Returns 0 in case of success, -1 in case of error
*/
int
virNetworkUndefine(virNetworkPtr network)
{
virConnectPtr conn;
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, -1);
conn = network->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->networkDriver && conn->networkDriver->networkUndefine) {
int ret;
ret = conn->networkDriver->networkUndefine(network);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkUpdate:
* @network: pointer to a defined network
* @section: which section of the network to update
* (see virNetworkUpdateSection for descriptions)
* @command: what action to perform (add/delete/modify)
* (see virNetworkUpdateCommand for descriptions)
* @parentIndex: which parent element, if there are multiple parents
* of the same type (e.g. which <ip> element when modifying
* a <dhcp>/<host> element), or "-1" for "don't care" or
* "automatically find appropriate one".
* @xml: the XML description for the network, preferably in UTF-8
* @flags: bitwise OR of virNetworkUpdateFlags.
*
* Update the definition of an existing network, either its live
* running state, its persistent configuration, or both.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virNetworkUpdate(virNetworkPtr network,
unsigned int command, /* virNetworkUpdateCommand */
unsigned int section, /* virNetworkUpdateSection */
int parentIndex,
const char *xml,
unsigned int flags)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, section=%d, parentIndex=%d, xml=%s, flags=0x%x",
network, section, parentIndex, xml, flags);
virResetLastError();
virCheckNetworkReturn(network, -1);
conn = network->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(xml, error);
if (conn->networkDriver && conn->networkDriver->networkUpdate) {
int ret;
ret = conn->networkDriver->networkUpdate(network, section, command,
parentIndex, xml, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkCreate:
* @network: pointer to a defined network
*
* Create and start a defined network. If the call succeed the network
* moves from the defined to the running networks pools.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virNetworkCreate(virNetworkPtr network)
{
virConnectPtr conn;
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, -1);
conn = network->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->networkDriver && conn->networkDriver->networkCreate) {
int ret;
ret = conn->networkDriver->networkCreate(network);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkDestroy:
* @network: a network object
*
* Destroy the network object. The running instance is shutdown if not down
* already and all resources used by it are given back to the hypervisor. This
* does not free the associated virNetworkPtr object.
* This function may require privileged access
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virNetworkDestroy(virNetworkPtr network)
{
virConnectPtr conn;
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, -1);
conn = network->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->networkDriver && conn->networkDriver->networkDestroy) {
int ret;
ret = conn->networkDriver->networkDestroy(network);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkFree:
* @network: a network object
*
* Free the network object. The running instance is kept alive.
* The data structure is freed and should not be used thereafter.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virNetworkFree(virNetworkPtr network)
{
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, -1);
virObjectUnref(network);
return 0;
}
/**
* virNetworkRef:
* @network: the network to hold a reference on
*
* Increment the reference count on the network. For each
* additional call to this method, there shall be a corresponding
* call to virNetworkFree to release the reference count, once
* the caller no longer needs the reference to this object.
*
* This method is typically useful for applications where multiple
* threads are using a connection, and it is required that the
* connection remain open until all threads have finished using
* it. ie, each new thread using a network would increment
* the reference count.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virNetworkRef(virNetworkPtr network)
{
VIR_DEBUG("network=%p refs=%d", network,
network ? network->object.u.s.refs : 0);
virResetLastError();
virCheckNetworkReturn(network, -1);
virObjectRef(network);
return 0;
}
/**
* virNetworkGetName:
* @network: a network object
*
* Get the public name for that network
*
* Returns a pointer to the name or NULL, the string need not be deallocated
* its lifetime will be the same as the network object.
*/
const char *
virNetworkGetName(virNetworkPtr network)
{
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, NULL);
return network->name;
}
/**
* virNetworkGetUUID:
* @network: a network object
* @uuid: pointer to a VIR_UUID_BUFLEN bytes array
*
* Get the UUID for a network
*
* Returns -1 in case of error, 0 in case of success
*/
int
virNetworkGetUUID(virNetworkPtr network, unsigned char *uuid)
{
VIR_DEBUG("network=%p, uuid=%p", network, uuid);
virResetLastError();
virCheckNetworkReturn(network, -1);
virCheckNonNullArgGoto(uuid, error);
memcpy(uuid, &network->uuid[0], VIR_UUID_BUFLEN);
return 0;
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkGetUUIDString:
* @network: a network object
* @buf: pointer to a VIR_UUID_STRING_BUFLEN bytes array
*
* Get the UUID for a network as string. For more information about
* UUID see RFC4122.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virNetworkGetUUIDString(virNetworkPtr network, char *buf)
{
VIR_DEBUG("network=%p, buf=%p", network, buf);
virResetLastError();
virCheckNetworkReturn(network, -1);
virCheckNonNullArgGoto(buf, error);
virUUIDFormat(network->uuid, buf);
return 0;
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkGetXMLDesc:
* @network: a network object
* @flags: bitwise-OR of virNetworkXMLFlags
*
* Provide an XML description of the network. The description may be reused
* later to relaunch the network with virNetworkCreateXML().
*
* Normally, if a network included a physical function, the output includes
* all virtual functions tied to that physical interface. If @flags includes
* VIR_NETWORK_XML_INACTIVE, then the expansion of virtual interfaces is
* not performed.
*
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virNetworkGetXMLDesc(virNetworkPtr network, unsigned int flags)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, flags=%x", network, flags);
virResetLastError();
virCheckNetworkReturn(network, NULL);
conn = network->conn;
if (conn->networkDriver && conn->networkDriver->networkGetXMLDesc) {
char *ret;
ret = conn->networkDriver->networkGetXMLDesc(network, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return NULL;
}
/**
* virNetworkGetBridgeName:
* @network: a network object
*
* Provides a bridge interface name to which a domain may connect
* a network interface in order to join the network.
*
* Returns a 0 terminated interface name, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virNetworkGetBridgeName(virNetworkPtr network)
{
virConnectPtr conn;
VIR_DEBUG("network=%p", network);
virResetLastError();
virCheckNetworkReturn(network, NULL);
conn = network->conn;
if (conn->networkDriver && conn->networkDriver->networkGetBridgeName) {
char *ret;
ret = conn->networkDriver->networkGetBridgeName(network);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return NULL;
}
/**
* virNetworkGetAutostart:
* @network: a network object
* @autostart: the value returned
*
* Provides a boolean value indicating whether the network
* configured to be automatically started when the host
* machine boots.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virNetworkGetAutostart(virNetworkPtr network,
int *autostart)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, autostart=%p", network, autostart);
virResetLastError();
virCheckNetworkReturn(network, -1);
virCheckNonNullArgGoto(autostart, error);
conn = network->conn;
if (conn->networkDriver && conn->networkDriver->networkGetAutostart) {
int ret;
ret = conn->networkDriver->networkGetAutostart(network, autostart);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkSetAutostart:
* @network: a network object
* @autostart: whether the network should be automatically started 0 or 1
*
* Configure the network to be automatically started
* when the host machine boots.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virNetworkSetAutostart(virNetworkPtr network,
int autostart)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, autostart=%d", network, autostart);
virResetLastError();
virCheckNetworkReturn(network, -1);
conn = network->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->networkDriver && conn->networkDriver->networkSetAutostart) {
int ret;
ret = conn->networkDriver->networkSetAutostart(network, autostart);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkIsActive:
* @net: pointer to the network object
*
* Determine if the network is currently running
*
* Returns 1 if running, 0 if inactive, -1 on error
*/
int
virNetworkIsActive(virNetworkPtr net)
{
VIR_DEBUG("net=%p", net);
virResetLastError();
virCheckNetworkReturn(net, -1);
if (net->conn->networkDriver->networkIsActive) {
int ret;
ret = net->conn->networkDriver->networkIsActive(net);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(net->conn);
return -1;
}
/**
* virNetworkIsPersistent:
* @net: pointer to the network object
*
* Determine if the network has a persistent configuration
* which means it will still exist after shutting down
*
* Returns 1 if persistent, 0 if transient, -1 on error
*/
int
virNetworkIsPersistent(virNetworkPtr net)
{
VIR_DEBUG("net=%p", net);
virResetLastError();
virCheckNetworkReturn(net, -1);
if (net->conn->networkDriver->networkIsPersistent) {
int ret;
ret = net->conn->networkDriver->networkIsPersistent(net);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(net->conn);
return -1;
}
/**
* virConnectNetworkEventRegisterAny:
* @conn: pointer to the connection
* @net: pointer to the network
* @eventID: the event type to receive
* @cb: callback to the function handling network events
* @opaque: opaque data to pass on to the callback
* @freecb: optional function to deallocate opaque when not used anymore
*
* Adds a callback to receive notifications of arbitrary network events
* occurring on a network. This function requires that an event loop
* has been previously registered with virEventRegisterImpl() or
* virEventRegisterDefaultImpl().
*
* If @net is NULL, then events will be monitored for any network. If @net
* is non-NULL, then only the specific network will be monitored.
*
* Most types of event have a callback providing a custom set of parameters
* for the event. When registering an event, it is thus necessary to use
* the VIR_NETWORK_EVENT_CALLBACK() macro to cast the supplied function pointer
* to match the signature of this method.
*
* The virNetworkPtr object handle passed into the callback upon delivery
* of an event is only valid for the duration of execution of the callback.
* If the callback wishes to keep the network object after the callback
* returns, it shall take a reference to it, by calling virNetworkRef().
* The reference can be released once the object is no longer required
* by calling virNetworkFree().
*
* The return value from this method is a positive integer identifier
* for the callback. To unregister a callback, this callback ID should
* be passed to the virConnectNetworkEventDeregisterAny() method.
*
* Returns a callback identifier on success, -1 on failure.
*/
int
virConnectNetworkEventRegisterAny(virConnectPtr conn,
virNetworkPtr net,
int eventID,
virConnectNetworkEventGenericCallback cb,
void *opaque,
virFreeCallback freecb)
{
VIR_DEBUG("conn=%p, eventID=%d, cb=%p, opaque=%p, freecb=%p",
conn, eventID, cb, opaque, freecb);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (net) {
virCheckNetworkGoto(net, error);
if (net->conn != conn) {
virReportInvalidArg(net,
_("network '%s' in %s must match connection"),
net->name, __FUNCTION__);
goto error;
}
}
virCheckNonNullArgGoto(cb, error);
virCheckNonNegativeArgGoto(eventID, error);
if (eventID >= VIR_NETWORK_EVENT_ID_LAST) {
virReportInvalidArg(eventID,
_("eventID in %s must be less than %d"),
__FUNCTION__, VIR_NETWORK_EVENT_ID_LAST);
goto error;
}
if (conn->networkDriver && conn->networkDriver->connectNetworkEventRegisterAny) {
int ret;
ret = conn->networkDriver->connectNetworkEventRegisterAny(conn, net,
eventID,
cb, opaque,
freecb);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectNetworkEventDeregisterAny:
* @conn: pointer to the connection
* @callbackID: the callback identifier
*
* Removes an event callback. The callbackID parameter should be the
* value obtained from a previous virConnectNetworkEventRegisterAny() method.
*
* Returns 0 on success, -1 on failure
*/
int
virConnectNetworkEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
VIR_DEBUG("conn=%p, callbackID=%d", conn, callbackID);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNegativeArgGoto(callbackID, error);
if (conn->networkDriver &&
conn->networkDriver->connectNetworkEventDeregisterAny) {
int ret;
ret = conn->networkDriver->connectNetworkEventDeregisterAny(conn,
callbackID);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virNetworkGetDHCPLeases:
* @network: Pointer to network object
* @mac: Optional ASCII formatted MAC address of an interface
* @leases: Pointer to a variable to store the array containing details on
* obtained leases, or NULL if the list is not required (just returns
* number of leases).
* @flags: Extra flags, not used yet, so callers should always pass 0
*
* For DHCPv4, the information returned:
* - Network Interface Name
* - Expiry Time
* - MAC address
* - IAID (NULL)
* - IPv4 address (with type and prefix)
* - Hostname (can be NULL)
* - Client ID (can be NULL)
*
* For DHCPv6, the information returned:
* - Network Interface Name
* - Expiry Time
* - MAC address
* - IAID (can be NULL, only in rare cases)
* - IPv6 address (with type and prefix)
* - Hostname (can be NULL)
* - Client DUID
*
* Note: @mac, @iaid, @ipaddr, @clientid are in ASCII form, not raw bytes.
* Note: @expirytime can 0, in case the lease is for infinite time.
*
* The API fetches leases info of guests in the specified network. If the
* optional parameter @mac is specified, the returned list will contain only
* lease info about a specific guest interface with @mac. There can be
* multiple leases for a single @mac because this API supports DHCPv6 too.
*
* Returns the number of leases found or -1 and sets @leases to NULL in
* case of error. On success, the array stored into @leases is guaranteed to
* have an extra allocated element set to NULL but not included in the return
* count, to make iteration easier. The caller is responsible for calling
* virNetworkDHCPLeaseFree() on each array element, then calling free() on @leases.
*
* See also virNetworkGetDHCPLeasesForMAC() as a convenience for filtering
* the list to a single MAC address.
*
* Example of usage:
*
* virNetworkDHCPLeasePtr *leases = NULL;
* virNetworkPtr network = ... obtain a network pointer here ...;
* size_t i;
* int nleases;
* unsigned int flags = 0;
*
* nleases = virNetworkGetDHCPLeases(network, NULL, &leases, flags);
* if (nleases < 0)
* error();
*
* ... do something with returned values, for example:
*
* for (i = 0; i < nleases; i++) {
* virNetworkDHCPLeasePtr lease = leases[i];
*
* printf("Time(epoch): %lu, MAC address: %s, "
* "IP address: %s, Hostname: %s, ClientID: %s\n",
* lease->expirytime, lease->mac, lease->ipaddr,
* lease->hostname, lease->clientid);
*
* virNetworkDHCPLeaseFree(leases[i]);
* }
*
* free(leases);
*
*/
int
virNetworkGetDHCPLeases(virNetworkPtr network,
const char *mac,
virNetworkDHCPLeasePtr **leases,
unsigned int flags)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, mac='%s' leases=%p, flags=%x",
network, NULLSTR(mac), leases, flags);
virResetLastError();
if (leases)
*leases = NULL;
virCheckNetworkReturn(network, -1);
conn = network->conn;
if (conn->networkDriver && conn->networkDriver->networkGetDHCPLeases) {
int ret;
ret = conn->networkDriver->networkGetDHCPLeases(network, mac, leases, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkDHCPLeaseFree:
* @lease: pointer to a leases object
*
* Frees all the memory occupied by @lease.
*/
void
virNetworkDHCPLeaseFree(virNetworkDHCPLeasePtr lease)
{
if (!lease)
return;
VIR_FREE(lease->iface);
VIR_FREE(lease->mac);
VIR_FREE(lease->iaid);
VIR_FREE(lease->ipaddr);
VIR_FREE(lease->hostname);
VIR_FREE(lease->clientid);
VIR_FREE(lease);
}