GIF89a=( �' 7IAXKgNgYvYx\%wh&h}t�h%�s%x�}9�R��&�0%� (�.��5�SD��&�a)�x5��;ͣ*ȡ&ղ)ׯ7׵<ѻ4�3�H֧KͯT��Y�aq��q��F� !� ' !� NETSCAPE2.0 , =( ��pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g���E�������R���E����B�� ��ȸ��D���"�Ů� �H��L��D٫D�B�����D���T���H �G��A R�ڐ |�� ٭&��E8�S�kG�A�px�a��� R2XB��E8I���6X�:vT)�~��q�賥��"F~%x� � 4#Z�0O|-4Bs�X:= Q� Sal��yXJ`GȦ|s h��K3l7�B|�$'7Jީܪ0!��D�n=�P� ����0`�R�lj����v>���5 �.69�ϸd�����nlv�9��f{���Pbx �l5}�p� ��� �3a���I�O����!ܾ���i��9��#��)p�a ޽ �{�)vm��%D~ 6f��s}Œ�D�W E�`!� �&L8x� �ܝ{)x`X/>�}m��R�*|`D�=�_ ^�5 !_&'a�O�7�c��`DCx`�¥�9�Y�F���`?��"� �n@`�} lď��@4>�d S �v�xN��"@~d��=�g�s~G��� ���ud &p8Q�)ƫlXD����A~H�ySun�j���k*D�LH�] ��C"J��Xb~ʪwSt}6K,��q�S:9ت:���l�@�`�� �.۬�t9�S�[:��=`9N����{¿�A !R�:���6��x�0�_ �;������^���#����!����U���;0L1�����p% A��U̬ݵ��%�S��!���~`�G���� ���=4�np�3���������u�u�ٮ|%2�I��r�#0��J``8�@S@5� ���^`8E�]�.�S���7 � �0�j S�D� z���i�S�����!���l��w9*�D�I�nEX��� &A�Go�Qf��F��;���}�J����F5��Q|���X��T��y���]� o ��C=��:���PB@ D׽S�(>�C�x}`��xJЬ�۠��p+eE0`�}`A �/NE�� �9@��� H�7�!%B0`�l*��!8 2�%� �:�1�0E��ux%nP1�!�C)�P81l�ɸF#Ƭ{����B0>�� �b�`��O3��()yRpb��E.ZD8�H@% �Rx+%���c� ���f��b�d�`F�"8�XH"��-�|1�6iI, 2�$+](A*j� QT�o0.�U�`�R�}`�SN����yae�����b��o~ S)�y�@��3 �tT�0�&�+~L�f"�-|�~��>!�v��~�\Q1)}@�}h#aP72�"�$ !� " , =( &7IAXG]KgNgYvYxR"k\%w]'}h}t�h%�g+�s%r.m3ax3�x�}9��&��+�!7�0%� (�.�SD��&��;�"&ײ)׻4��6�K� �@pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g �� E �� �������E �´��C���ǶR��D��"Ʒ�ʱH��M��GڬD�B����D��T����G���C�C� l&�~:'�tU�6ɹ#��)�'�.6�&��Ȼ K(8p0N�?!�2"��NIJX>R��OM '��2�*x�>#n� �@<[:�I�f ��T���Cdb��[�}E�5MBo��@�`@��tW-3 �x�B���jI�&E�9[T&$��ﯧ&"s��ȳ����dc�UUρ#���ldj?����`\}���u|3'�R]�6 �S#�!�FKL�*N E���`$�:e�YD�q�.�촁�s \-�jA 9�����-��M[�x(�s��x�|���p��}k�T�DpE@W� ��]k`1� ���Yb ��0l��*n0��"~zBd�~u�7�0Bl��0-�x~|U�U0 �h�*HS�|��e"#"?vp�i`e6^�+q��`m8 #V�� ��VS|`��"m"сSn|@:U���~`pb�G�ED����2F�I�? >�x� R� ��%~jx��<�a�9ij�2�D��&: Z`�]w���:�6��B�7eFJ|�ҧ�,���FǮcS�ʶ+B�,�ܺN���>PAD�HD��~���n��}�#�� Q��S���2�X�{�k�lQ�2�����w�|2� h9��G�,m���3��6-��E�L��I�³*K���q�`DwV�QXS��peS��� qܧTS����R�u �<�a�*At�lmE� � ��N[P1�ۦ��$��@`��Dpy�yXvCAy�B`}D� 0QwG#� �a[^�� $���Ǧ{L�"[��K�g�;�S~��GX.�goT.��ư��x���?1z��x~:�g�|�L� ��S`��0S]P�^p F<""�?!,�!N4&P� ����:T�@h�9%t��:�-~�I<`�9p I&.)^ 40D#p@�j4�ج:�01��rܼF2oW�#Z ;$Q q  �K��Nl#29 !F@�Bh�ᏬL!XF�LHKh�.�hE&J�G��<"WN!�����Y@� >R~19J"�2,/ &.GXB%�R�9B6�W]���W�I�$��9�RE8Y� ��"�A5�Q.axB�&ة�J�! �t)K%tS-�JF b�NMxL��)�R��"���6O!TH�H� 0 !� ) , =( &AXKgNgYvYxR"k\%wh&h}h%�g+�s%r.x3�x�}9��&��+�R,�!7�0%� (�.��5��&�a)��;�"&ף*Ȳ)ׯ7׻4�3��6�H֧KͻH�T��Y��q��h� ��pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g �� E$����� � ����$E$��"��D� � ������R��C��� E ��H�M��G�D� �B��ϾD��a��`1r��Ӑ�� �o~�zU!L�C'�yW�UGt����ll�0���uG�)A�s[��x� �xO%��X2�  P�n:R/��aHae+�Dm?# ǣ6�8�J�x�Di�M���j���5oQ7�- <! *�l��R2r/a!l)d� A"�E���� &� ;��c �%����b��pe~C"B���H�eF2��`8qb�t_`ur`e� w�u3��Pv�h""�`�Íx�LĹ��3� �~ֺ�:���MDfJ� �۵�W�%�S�X �؁)�@��:E��w�u�Sxb8y\m�zS��Zb�E�L��w!y(>�"w�=�|��s�d �C�W)H�cC$�L �7r.�\{)@�`@ �X�$PD `aaG:���O�72E�amn]�"Rc�x�R� &dR8`g��i�xLR!�P &d����T���i�|�_ � Qi�#�`g:��:noM� :V �)p����W&a=�e�k� j���1߲s�x�W�jal|0��B0�, \j۴:6���C ��W��|��9���zĸV {�;��n��V�m�I��.��PN� ����C��+��By�ѾHŸ:��� 7�Y�FTk�SaoaY$D�S���29R�kt� ��f� ��:��Sp�3�I��DZ� �9���g��u�*3)O��[_hv ,���Et x�BH� �[��64M@�S�M7d�l�ܶ5-��U܍��z�R3Ԭ3~ ��P��5�g: ���kN�&0�j4���#{��3S�2�K�'ợl���2K{� {۶?~m𸧠�I�nE�='����^���_�=��~�#O���'���o..�Y�n��CSO��a��K��o,���b�����{�C�� "�{�K ��w��Ozdը�:$ ���v�] A#� ���a�z)Rx׿ƥ�d``�w-�y�f�K!����|��P��=�`�(f��'Pa ��BJa%��f�%`�}F����6>��`G"�}�=�!o`�^FP�ةQ�C���`(�}\�ݮ ��$<��n@dĠE#��U�I�!� #l��9`k���'Rr��Z�NB�MF �[�+9���-�wj���8�r� ,V�h"�|�S=�G_��"E� 0i*%̲��da0mVk�):;&6p>�jK ��# �D�:�c?:R Ӭf��I-�"�<�="��7�3S��c2RW ,�8(T"P0F¡Jh�" ; 403WebShell
403Webshell
Server IP : 173.249.157.85  /  Your IP : 3.12.160.150
Web Server : Apache
System : Linux server.frogzhost.com 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64
User : econtech ( 1005)
PHP Version : 7.3.33
Disable Function : NONE
MySQL : OFF  |  cURL : OFF  |  WGET : ON  |  Perl : ON  |  Python : ON  |  Sudo : ON  |  Pkexec : ON
Directory :  /usr/include/bind9/dns/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :

[ Back ]     

Current File : /usr/include/bind9/dns/dispatch.h
/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef DNS_DISPATCH_H
#define DNS_DISPATCH_H 1

/*****
 ***** Module Info
 *****/

/*! \file dns/dispatch.h
 * \brief
 * DNS Dispatch Management
 * 	Shared UDP and single-use TCP dispatches for queries and responses.
 *
 * MP:
 *
 *\li     	All locking is performed internally to each dispatch.
 * 	Restrictions apply to dns_dispatch_removeresponse().
 *
 * Reliability:
 *
 * Resources:
 *
 * Security:
 *
 *\li	Depends on the isc_socket_t and dns_message_t for prevention of
 *	buffer overruns.
 *
 * Standards:
 *
 *\li	None.
 */

/***
 *** Imports
 ***/

#include <isc/buffer.h>
#include <isc/lang.h>
#include <isc/mutex.h>
#include <isc/socket.h>
#include <isc/types.h>

#include <dns/types.h>

ISC_LANG_BEGINDECLS

/*%
 * This event is sent to a task when a response comes in.
 * No part of this structure should ever be modified by the caller,
 * other than parts of the buffer.  The holy parts of the buffer are
 * the base and size of the buffer.  All other parts of the buffer may
 * be used.  On event delivery the used region contains the packet.
 *
 * "id" is the received message id,
 *
 * "addr" is the host that sent it to us,
 *
 * "buffer" holds state on the received data.
 *
 * The "free" routine for this event will clean up itself as well as
 * any buffer space allocated from common pools.
 */

struct dns_dispatchevent {
	ISC_EVENT_COMMON(dns_dispatchevent_t);	/*%< standard event common */
	isc_result_t		result;		/*%< result code */
	isc_int32_t		id;		/*%< message id */
	isc_sockaddr_t		addr;		/*%< address recv'd from */
	struct in6_pktinfo	pktinfo;	/*%< reply info for v6 */
	isc_buffer_t	        buffer;		/*%< data buffer */
	isc_uint32_t		attributes;	/*%< mirrored from socket.h */
};

/*%
 * This is a set of one or more dispatches which can be retrieved
 * round-robin fashion.
 */
struct dns_dispatchset {
	isc_mem_t		*mctx;
	dns_dispatch_t		**dispatches;
	int			ndisp;
	int			cur;
	isc_mutex_t		lock;
};

/*@{*/
/*%
 * Attributes for added dispatchers.
 *
 * Values with the mask 0xffff0000 are application defined.
 * Values with the mask 0x0000ffff are library defined.
 *
 * Insane values (like setting both TCP and UDP) are not caught.  Don't
 * do that.
 *
 * _PRIVATE
 *	The dispatcher cannot be shared.
 *
 * _TCP, _UDP
 *	The dispatcher is a TCP or UDP socket.
 *
 * _IPV4, _IPV6
 *	The dispatcher uses an IPv4 or IPv6 socket.
 *
 * _NOLISTEN
 *	The dispatcher should not listen on the socket.
 *
 * _MAKEQUERY
 *	The dispatcher can be used to issue queries to other servers, and
 *	accept replies from them.
 *
 * _RANDOMPORT
 *	Previously used to indicate that the port of a dispatch UDP must be
 *	chosen randomly.  This behavior now always applies and the attribute
 *	is obsoleted.
 *
 * _EXCLUSIVE
 *	A separate socket will be used on-demand for each transaction.
 */
#define DNS_DISPATCHATTR_PRIVATE	0x00000001U
#define DNS_DISPATCHATTR_TCP		0x00000002U
#define DNS_DISPATCHATTR_UDP		0x00000004U
#define DNS_DISPATCHATTR_IPV4		0x00000008U
#define DNS_DISPATCHATTR_IPV6		0x00000010U
#define DNS_DISPATCHATTR_NOLISTEN	0x00000020U
#define DNS_DISPATCHATTR_MAKEQUERY	0x00000040U
#define DNS_DISPATCHATTR_CONNECTED	0x00000080U
#define DNS_DISPATCHATTR_FIXEDID	0x00000100U
#define DNS_DISPATCHATTR_EXCLUSIVE	0x00000200U
/*@}*/

/*
 */
#define DNS_DISPATCHOPT_FIXEDID		0x00000001U

isc_result_t
dns_dispatchmgr_create(isc_mem_t *mctx, isc_entropy_t *entropy,
		       dns_dispatchmgr_t **mgrp);
/*%<
 * Creates a new dispatchmgr object.
 *
 * Requires:
 *\li	"mctx" be a valid memory context.
 *
 *\li	mgrp != NULL && *mgrp == NULL
 *
 *\li	"entropy" may be NULL, in which case an insecure random generator
 *	will be used.  If it is non-NULL, it must be a valid entropy
 *	source.
 *
 * Returns:
 *\li	ISC_R_SUCCESS	-- all ok
 *
 *\li	anything else	-- failure
 */


void
dns_dispatchmgr_destroy(dns_dispatchmgr_t **mgrp);
/*%<
 * Destroys the dispatchmgr when it becomes empty.  This could be
 * immediately.
 *
 * Requires:
 *\li	mgrp != NULL && *mgrp is a valid dispatchmgr.
 */


void
dns_dispatchmgr_setblackhole(dns_dispatchmgr_t *mgr, dns_acl_t *blackhole);
/*%<
 * Sets the dispatcher's "blackhole list," a list of addresses that will
 * be ignored by all dispatchers created by the dispatchmgr.
 *
 * Requires:
 * \li	mgrp is a valid dispatchmgr
 * \li	blackhole is a valid acl
 */


dns_acl_t *
dns_dispatchmgr_getblackhole(dns_dispatchmgr_t *mgr);
/*%<
 * Gets a pointer to the dispatcher's current blackhole list,
 * without incrementing its reference count.
 *
 * Requires:
 *\li 	mgr is a valid dispatchmgr
 * Returns:
 *\li	A pointer to the current blackhole list, or NULL.
 */

void
dns_dispatchmgr_setblackportlist(dns_dispatchmgr_t *mgr,
				 dns_portlist_t *portlist);
/*%<
 * This function is deprecated.  Use dns_dispatchmgr_setavailports() instead.
 *
 * Requires:
 *\li	mgr is a valid dispatchmgr
 */

dns_portlist_t *
dns_dispatchmgr_getblackportlist(dns_dispatchmgr_t *mgr);
/*%<
 * This function is deprecated and always returns NULL.
 *
 * Requires:
 *\li	mgr is a valid dispatchmgr
 */

isc_result_t
dns_dispatchmgr_setavailports(dns_dispatchmgr_t *mgr, isc_portset_t *v4portset,
			      isc_portset_t *v6portset);
/*%<
 * Sets a list of UDP ports that can be used for outgoing UDP messages.
 *
 * Requires:
 *\li	mgr is a valid dispatchmgr
 *\li	v4portset is NULL or a valid port set
 *\li	v6portset is NULL or a valid port set
 */

void
dns_dispatchmgr_setstats(dns_dispatchmgr_t *mgr, isc_stats_t *stats);
/*%<
 * Sets statistics counter for the dispatchmgr.  This function is expected to
 * be called only on zone creation (when necessary).
 * Once installed, it cannot be removed or replaced.  Also, there is no
 * interface to get the installed stats from the zone; the caller must keep the
 * stats to reference (e.g. dump) it later.
 *
 * Requires:
 *\li	mgr is a valid dispatchmgr with no managed dispatch.
 *\li	stats is a valid statistics supporting resolver statistics counters
 *	(see dns/stats.h).
 */

isc_result_t
dns_dispatch_getudp(dns_dispatchmgr_t *mgr, isc_socketmgr_t *sockmgr,
		    isc_taskmgr_t *taskmgr, isc_sockaddr_t *localaddr,
		    unsigned int buffersize,
		    unsigned int maxbuffers, unsigned int maxrequests,
		    unsigned int buckets, unsigned int increment,
		    unsigned int attributes, unsigned int mask,
		    dns_dispatch_t **dispp);

isc_result_t
dns_dispatch_getudp_dup(dns_dispatchmgr_t *mgr, isc_socketmgr_t *sockmgr,
		    isc_taskmgr_t *taskmgr, isc_sockaddr_t *localaddr,
		    unsigned int buffersize,
		    unsigned int maxbuffers, unsigned int maxrequests,
		    unsigned int buckets, unsigned int increment,
		    unsigned int attributes, unsigned int mask,
		    dns_dispatch_t **dispp, dns_dispatch_t *dup);
/*%<
 * Attach to existing dns_dispatch_t if one is found with dns_dispatchmgr_find,
 * otherwise create a new UDP dispatch.
 *
 * Requires:
 *\li	All pointer parameters be valid for their respective types.
 *
 *\li	dispp != NULL && *disp == NULL
 *
 *\li	512 <= buffersize <= 64k
 *
 *\li	maxbuffers > 0
 *
 *\li	buckets < 2097169
 *
 *\li	increment > buckets
 *
 *\li	(attributes & DNS_DISPATCHATTR_TCP) == 0
 *
 * Returns:
 *\li	ISC_R_SUCCESS	-- success.
 *
 *\li	Anything else	-- failure.
 */

isc_result_t
dns_dispatch_createtcp(dns_dispatchmgr_t *mgr, isc_socket_t *sock,
		       isc_taskmgr_t *taskmgr, unsigned int buffersize,
		       unsigned int maxbuffers, unsigned int maxrequests,
		       unsigned int buckets, unsigned int increment,
		       unsigned int attributes, dns_dispatch_t **dispp);
isc_result_t
dns_dispatch_createtcp2(dns_dispatchmgr_t *mgr, isc_socket_t *sock,
			isc_taskmgr_t *taskmgr, isc_sockaddr_t *localaddr,
			isc_sockaddr_t *destaddr, unsigned int buffersize,
			unsigned int maxbuffers, unsigned int maxrequests,
			unsigned int buckets, unsigned int increment,
			unsigned int attributes, dns_dispatch_t **dispp);
/*%<
 * Create a new dns_dispatch and attach it to the provided isc_socket_t.
 *
 * For all dispatches, "buffersize" is the maximum packet size we will
 * accept.
 *
 * "maxbuffers" and "maxrequests" control the number of buffers in the
 * overall system and the number of buffers which can be allocated to
 * requests.
 *
 * "buckets" is the number of buckets to use, and should be prime.
 *
 * "increment" is used in a collision avoidance function, and needs to be
 * a prime > buckets, and not 2.
 *
 * Requires:
 *
 *\li	mgr is a valid dispatch manager.
 *
 *\li	sock is a valid.
 *
 *\li	task is a valid task that can be used internally to this dispatcher.
 *
 * \li	512 <= buffersize <= 64k
 *
 *\li	maxbuffers > 0.
 *
 *\li	maxrequests <= maxbuffers.
 *
 *\li	buckets < 2097169 (the next prime after 65536 * 32)
 *
 *\li	increment > buckets (and prime).
 *
 *\li	attributes includes #DNS_DISPATCHATTR_TCP and does not include
 *	#DNS_DISPATCHATTR_UDP.
 *
 * Returns:
 *\li	ISC_R_SUCCESS	-- success.
 *
 *\li	Anything else	-- failure.
 */

void
dns_dispatch_attach(dns_dispatch_t *disp, dns_dispatch_t **dispp);
/*%<
 * Attach to a dispatch handle.
 *
 * Requires:
 *\li	disp is valid.
 *
 *\li	dispp != NULL && *dispp == NULL
 */

void
dns_dispatch_detach(dns_dispatch_t **dispp);
/*%<
 * Detaches from the dispatch.
 *
 * Requires:
 *\li	dispp != NULL and *dispp be a valid dispatch.
 */

void
dns_dispatch_starttcp(dns_dispatch_t *disp);
/*%<
 * Start processing of a TCP dispatch once the socket connects.
 *
 * Requires:
 *\li	'disp' is valid.
 */

isc_result_t
dns_dispatch_gettcp(dns_dispatchmgr_t *mgr, isc_sockaddr_t *destaddr,
		    isc_sockaddr_t *localaddr, dns_dispatch_t **dispp);
isc_result_t
dns_dispatch_gettcp2(dns_dispatchmgr_t *mgr, isc_sockaddr_t *destaddr,
		     isc_sockaddr_t *localaddr, isc_boolean_t *connected,
		     dns_dispatch_t **dispp);
/*
 * Attempt to connect to a existing TCP connection (connection completed
 * for dns_dispatch_gettcp()).
 */


isc_result_t
dns_dispatch_addresponse3(dns_dispatch_t *disp, unsigned int options,
			  isc_sockaddr_t *dest, isc_task_t *task,
			  isc_taskaction_t action, void *arg,
			  isc_uint16_t *idp, dns_dispentry_t **resp,
			  isc_socketmgr_t *sockmgr);

isc_result_t
dns_dispatch_addresponse2(dns_dispatch_t *disp, isc_sockaddr_t *dest,
			  isc_task_t *task, isc_taskaction_t action, void *arg,
			  isc_uint16_t *idp, dns_dispentry_t **resp,
			  isc_socketmgr_t *sockmgr);

isc_result_t
dns_dispatch_addresponse(dns_dispatch_t *disp, isc_sockaddr_t *dest,
			 isc_task_t *task, isc_taskaction_t action, void *arg,
			 isc_uint16_t *idp, dns_dispentry_t **resp);
/*%<
 * Add a response entry for this dispatch.
 *
 * "*idp" is filled in with the assigned message ID, and *resp is filled in
 * to contain the magic token used to request event flow stop.
 *
 * Arranges for the given task to get a callback for response packets.  When
 * the event is delivered, it must be returned using dns_dispatch_freeevent()
 * or through dns_dispatch_removeresponse() for another to be delivered.
 *
 * Requires:
 *\li	"idp" be non-NULL.
 *
 *\li	"task" "action" and "arg" be set as appropriate.
 *
 *\li	"dest" be non-NULL and valid.
 *
 *\li	"resp" be non-NULL and *resp be NULL
 *
 *\li	"sockmgr" be NULL or a valid socket manager.  If 'disp' has
 *	the DNS_DISPATCHATTR_EXCLUSIVE attribute, this must not be NULL,
 *	which also means dns_dispatch_addresponse() cannot be used.
 *
 * Ensures:
 *
 *\li	&lt;id, dest> is a unique tuple.  That means incoming messages
 *	are identifiable.
 *
 * Returns:
 *
 *\li	ISC_R_SUCCESS		-- all is well.
 *\li	ISC_R_NOMEMORY		-- memory could not be allocated.
 *\li	ISC_R_NOMORE		-- no more message ids can be allocated
 *				   for this destination.
 */


void
dns_dispatch_removeresponse(dns_dispentry_t **resp,
			    dns_dispatchevent_t **sockevent);
/*%<
 * Stops the flow of responses for the provided id and destination.
 * If "sockevent" is non-NULL, the dispatch event and associated buffer is
 * also returned to the system.
 *
 * Requires:
 *\li	"resp" != NULL and "*resp" contain a value previously allocated
 *	by dns_dispatch_addresponse();
 *
 *\li	May only be called from within the task given as the 'task'
 * 	argument to dns_dispatch_addresponse() when allocating '*resp'.
 */

isc_socket_t *
dns_dispatch_getentrysocket(dns_dispentry_t *resp);

isc_socket_t *
dns_dispatch_getsocket(dns_dispatch_t *disp);
/*%<
 * Return the socket associated with this dispatcher.
 *
 * Requires:
 *\li	disp is valid.
 *
 * Returns:
 *\li	The socket the dispatcher is using.
 */

isc_result_t
dns_dispatch_getlocaladdress(dns_dispatch_t *disp, isc_sockaddr_t *addrp);
/*%<
 * Return the local address for this dispatch.
 * This currently only works for dispatches using UDP sockets.
 *
 * Requires:
 *\li	disp is valid.
 *\li	addrp to be non null.
 *
 * Returns:
 *\li	ISC_R_SUCCESS
 *\li	ISC_R_NOTIMPLEMENTED
 */

void
dns_dispatch_cancel(dns_dispatch_t *disp);
/*%<
 * cancel outstanding clients
 *
 * Requires:
 *\li	disp is valid.
 */

unsigned int
dns_dispatch_getattributes(dns_dispatch_t *disp);
/*%<
 * Return the attributes (DNS_DISPATCHATTR_xxx) of this dispatch.  Only the
 * non-changeable attributes are expected to be referenced by the caller.
 *
 * Requires:
 *\li	disp is valid.
 */

void
dns_dispatch_changeattributes(dns_dispatch_t *disp,
			      unsigned int attributes, unsigned int mask);
/*%<
 * Set the bits described by "mask" to the corresponding values in
 * "attributes".
 *
 * That is:
 *
 * \code
 *	new = (old & ~mask) | (attributes & mask)
 * \endcode
 *
 * This function has a side effect when #DNS_DISPATCHATTR_NOLISTEN changes.
 * When the flag becomes off, the dispatch will start receiving on the
 * corresponding socket.  When the flag becomes on, receive events on the
 * corresponding socket will be canceled.
 *
 * Requires:
 *\li	disp is valid.
 *
 *\li	attributes are reasonable for the dispatch.  That is, setting the UDP
 *	attribute on a TCP socket isn't reasonable.
 */

void
dns_dispatch_importrecv(dns_dispatch_t *disp, isc_event_t *event);
/*%<
 * Inform the dispatcher of a socket receive.  This is used for sockets
 * shared between dispatchers and clients.  If the dispatcher fails to copy
 * or send the event, nothing happens.
 *
 * If the attribute DNS_DISPATCHATTR_NOLISTEN is not set, then
 * the dispatch is already handling a recv; return immediately.
 *
 * Requires:
 *\li 	disp is valid, and the attribute DNS_DISPATCHATTR_NOLISTEN is set.
 * 	event != NULL
 */

dns_dispatch_t *
dns_dispatchset_get(dns_dispatchset_t *dset);
/*%<
 * Retrieve the next dispatch from dispatch set 'dset', and increment
 * the round-robin counter.
 *
 * Requires:
 *\li 	dset != NULL
 */

isc_result_t
dns_dispatchset_create(isc_mem_t *mctx, isc_socketmgr_t *sockmgr,
		       isc_taskmgr_t *taskmgr, dns_dispatch_t *source,
		       dns_dispatchset_t **dsetp, int n);
/*%<
 * Given a valid dispatch 'source', create a dispatch set containing
 * 'n' UDP dispatches, with the remainder filled out by clones of the
 * source.
 *
 * Requires:
 *\li 	source is a valid UDP dispatcher
 *\li 	dsetp != NULL, *dsetp == NULL
 */

void
dns_dispatchset_cancelall(dns_dispatchset_t *dset, isc_task_t *task);
/*%<
 * Cancel socket operations for the dispatches in 'dset'.
 */

void
dns_dispatchset_destroy(dns_dispatchset_t **dsetp);
/*%<
 * Dereference all the dispatches in '*dsetp', free the dispatchset
 * memory, and set *dsetp to NULL.
 *
 * Requires:
 *\li 	dset is valid
 */

void
dns_dispatch_setdscp(dns_dispatch_t *disp, isc_dscp_t dscp);
isc_dscp_t
dns_dispatch_getdscp(dns_dispatch_t *disp);
/*%<
 * Set/get the DSCP value to be used when sending responses to clients,
 * as defined in the "listen-on" or "listen-on-v6" statements.
 *
 * Requires:
 *\li	disp is valid.
 */

isc_result_t
dns_dispatch_getnext(dns_dispentry_t *resp, dns_dispatchevent_t **sockevent);
/*%<
 * Free the sockevent and trigger the sending of the next item off the
 * dispatch queue if present.
 *
 * Requires:
 *\li	resp is valid
 *\li	*sockevent to be valid
 */

ISC_LANG_ENDDECLS

#endif /* DNS_DISPATCH_H */

Youez - 2016 - github.com/yon3zu
LinuXploit