����JFIFXX�����    $.' ",#(7),01444'9=82<.342  2!!22222222222222222222222222222222222222222222222222����"��4�� ���,�PG"Z_�4�˷����kjز�Z�,F+��_z�,�© �����zh6�٨�ic�fu���#ډb���_�N�?��wQ���5-�~�I���8����TK<5o�Iv-�����k�_U_�����~b�M��d����Ӝ�U�Hh��?]��E�w��Q���k�{��_}qFW7HTՑ��Y��F�?_�'ϔ��_�Ջt��=||I ��6�έ"�����D���/[�k�9���Y�8ds|\���Ҿp6�Ҵ���]��.����6�z<�v��@]�i%��$j��~�g��J>��no����pM[me�i$[����s�o�ᘨ�˸ nɜG-�ĨU�ycP�3.DB�li�;��hj���x7Z^�N�h������N3u{�:j�x�힞��#M&��jL P@_���� P��&��o8������9�����@Sz6�t7#O�ߋ �s}Yf�T���lmr����Z)'N��k�۞p����w\�Tȯ?�8`�O��i{wﭹW�[�r�� ��Q4F�׊���3m&L�=��h3����z~��#�\�l :�F,j@�� ʱ�wQT����8�"kJO���6�֚l����}���R�>ډK���]��y����&����p�}b��;N�1�m�r$�|��7�>e�@B�TM*-iH��g�D�)� E�m�|�ؘbҗ�a��Ҿ����t4���o���G��*oCN�rP���Q��@z,|?W[0�����:�n,jWiE��W��$~/�hp\��?��{(�0���+�Y8rΟ�+����>S-S����VN;�}�s?.����� w�9��˟<���Mq4�Wv'��{)0�1mB��V����W[�����8�/<� �%���wT^�5���b��)iM� pg�N�&ݝ��VO~�q���u���9� ����!��J27����$O-���! �:�%H��� ـ����y�ΠM=t{!S�� oK8������t<����è:a������[�����ա�H���~��w��Qz`�po�^ ����Q��n� �,uu�C�$ ^���,������8�#��:�6��e�|~���!�3�3.�\0��q��o�4`.|� ����y�Q�`~;�d�ׯ,��O�Zw�������`73�v�܋�<���Ȏ�� ـ4k��5�K�a�u�=9Yd��$>x�A�&�� j0� ���vF��� Y�|�y��� ~�6�@c��1vOp�Ig����4��l�OD���L����� R���c���j�_�uX6��3?nk��Wy�f;^*B� ��@�~a�`��Eu������+���6�L��.ü>��}y���}_�O�6�͐�:�YrG�X��kG�����l^w���~㒶sy��Iu�!� W ��X��N�7BV��O��!X�2����wvG�R�f�T#�����t�/?���%8�^�W�aT��G�cL�M���I��(J����1~�8�?aT ���]����AS�E��(��*E}� 2��#I/�׍qz��^t�̔���b�Yz4x���t�){ OH��+(E��A&�N�������XT��o��"�XC��'���)}�J�z�p� ��~5�}�^����+�6����w��c��Q�|Lp�d�H��}�(�.|����k��c4^�"�����Z?ȕ ��a<�L�!039C� �Eu�C�F�Ew�ç ;�n?�*o���B�8�bʝ���'#Rqf���M}7����]����s2tcS{�\icTx;�\��7K���P���ʇ Z O-��~��c>"��?�������P��E��O�8��@�8��G��Q�g�a�Վ���󁶠�䧘��_%#r�>�1�z�a��eb��qcPѵ��n���#L��� =��׀t� L�7�`��V���A{�C:�g���e@�w1 Xp3�c3�ġ����p��M"'-�@n4���fG��B3�DJ�8[Jo�ߐ���gK)ƛ��$���� ���8�3�����+���� �����6�ʻ���� ���S�kI�*KZlT _`���?��K����QK�d����B`�s}�>���`��*�>��,*@J�d�oF*����弝��O}�k��s��]��y�ߘ��c1G�V���<=�7��7����6�q�PT��tXԀ�!9*4�4Tހ3XΛex�46���Y��D ����� �BdemDa����\�_l,��G�/���֌7���Y�](�xTt^%�GE�����4�}bT���ڹ�����;Y)���B�Q��u��>J/J �⮶.�XԄ��j�ݳ�+E��d ��r�5�_D�1 ��o�� �B�x�΢�#���<��W�����8���R6�@g�M�.��� dr�D��>(otU��@x=��~v���2� ӣ�d�oBd��3�eO�6�㣷�����ݜ6��6Y��Qz`��S��{���\P�~z m5{J/L��1������<�e�ͅPu�b�]�ϔ���'������f�b� Zpw��c`"��i���BD@:)ִ�:�]��hv�E�w���T�l��P���"Ju�}��وV J��G6��. J/�Qgl߭�e�����@�z�Zev2u�)]կ�����7x���s�M�-<ɯ�c��r�v�����@��$�ޮ}lk���a���'����>x��O\�ZFu>�����ck#��&:��`�$�ai�>2Δ����l���oF[h��lE�ܺ�Πk:)���`�� $[6�����9�����kOw�\|���8}������ބ:��񶐕��I�A1/�=�2[�,�!��.}gN#�u����b��� ~��݊��}34q����d�E��Lc��$��"�[q�U�硬g^��%B �z���r�pJ�ru%v\h1Y�ne`ǥ:g���pQM~�^�Xi� ��`S�:V29.�P���V�?B�k�� AEvw%�_�9C�Q����wKekPؠ�\�;Io d�{ ߞo�c1eP����\� `����E=���@K<�Y���eڼ�J���w����{av�F�'�M�@/J��+9p���|]�����Iw &`��8���&M�hg��[�{��Xj��%��Ӓ�$��(����ʹN���<>�I���RY���K2�NPlL�ɀ)��&e����B+ь����( � �JTx���_?EZ� }@ 6�U���뙢ط�z��dWI�n` D����噥�[��uV��"�G&Ú����2g�}&m��?ċ�"����Om#��������� ��{�ON��"S�X��Ne��ysQ���@Fn��Vg���dX�~nj�]J�<�K]:��FW��b�������62�=��5f����JKw��bf�X�55��~J �%^����:�-�QIE��P��v�nZum� z � ~ə ���� ���ة����;�f��\v���g�8�1��f24;�V���ǔ�)����9���1\��c��v�/'Ƞ�w�������$�4�R-��t���� e�6�/�ġ �̕Ecy�J���u�B���<�W�ַ~�w[B1L۲�-JS΂�{���΃������A��20�c#��@ 0!1@AP"#2Q`$3V�%45a6�FRUq��� ����^7ׅ,$n�������+��F�`��2X'��0vM��p�L=������5��8������u�p~���.�`r�����\���O��,ư�0oS ��_�M�����l���4�kv\JSd���x���SW�<��Ae�IX����������$I���w�:S���y���›R��9�Q[���,�5�;�@]�%���u�@ *ro�lbI �� ��+���%m:�͇ZV�����u�̉����θau<�fc�.����{�4Ա� �Q����*�Sm��8\ujqs]{kN���)qO�y�_*dJ�b�7���yQqI&9�ԌK!�M}�R�;������S�T���1���i[U�ɵz�]��U)V�S6���3$K{�ߊ<�(� E]Զ[ǼENg�����'�\?#)Dkf��J���o��v���'�%ƞ�&K�u�!��b�35LX�Ϸ��63$K�a�;�9>,R��W��3�3� d�JeTYE.Mϧ��-�o�j3+y��y^�c�������VO�9NV\nd�1 ��!͕_)a�v;����թ�M�lWR1��)El��P;��yوÏ�u 3�k�5Pr6<�⒲l�!˞*��u־�n�!�l:����UNW ��%��Chx8vL'��X�@��*��)���̮��ˍ��� ���D-M�+J�U�kvK����+�x8��cY������?�Ԡ��~3mo��|�u@[XeY�C�\Kp�x8�oC�C�&����N�~3-H���� ��MX�s�u<`���~"WL��$8ξ��3���a�)|:@�m�\���^�`�@ҷ)�5p+��6���p�%i)P M���ngc�����#0Aruz���RL+xSS?���ʮ}()#�t��mˇ!��0}}y����<�e� �-ή�Ԩ��X������ MF���ԙ~l L.3���}�V뽺�v�����멬��Nl�)�2����^�Iq��a��M��qG��T�����c3#������3U�Ǎ���}��לS�|qa��ڃ�+���-��2�f����/��bz��ڐ�� �ݼ[2�ç����k�X�2�* �Z�d���J�G����M*9W���s{��w���T��x��y,�in�O�v��]���n����P�$�JB@=4�OTI�n��e�22a\����q�d���%�$��(���:���: /*�K[PR�fr\nڙdN���F�n�$�4�[�� U�zƶ����� �mʋ���,�ao�u 3�z� �x��Kn����\[��VFmbE;�_U��&V�Gg�]L�۪&#n%�$ɯ�dG���D�TI=�%+AB�Ru#��b4�1�»x�cs�YzڙJG��f��Il��d�eF'T� iA��T���uC�$����Y��H?����[!G`}���ͪ� �纤Hv\������j�Ex�K���!���OiƸ�Yj�+u-<���'q����uN�*�r\��+�]���<�wOZ.fp�ێ��,-*)V?j-kÊ#�`�r��dV����(�ݽBk�����G�ƛk�QmUڗe��Z���f}|����8�8��a���i��3'J�����~G_�^���d�8w������ R�`(�~�.��u���l�s+g�bv���W���lGc}��u���afE~1�Ue������Z�0�8�=e�� f@/�jqEKQQ�J��oN��J���W5~M>$6�Lt�;$ʳ{���^��6�{����v6���ķܰg�V�cnn �~z�x�«�,2�u�?cE+Ș�H؎�%�Za�)���X>uW�Tz�Nyo����s���FQƤ��$��*�&�LLXL)�1�" L��eO��ɟ�9=���:t��Z���c��Ž���Y?�ӭV�wv�~,Y��r�ۗ�|�y��GaF�����C�����.�+� ���v1���fήJ�����]�S��T��B��n5sW}y�$��~z�'�c ��8 ��� ,! �p��VN�S��N�N�q��y8z˱�A��4��*��'������2n<�s���^ǧ˭P�Jޮɏ�U�G�L�J�*#��<�V��t7�8����TĜ>��i}K%,���)[��z�21z ?�N�i�n1?T�I�R#��m-�����������������1����lA�`��fT5+��ܐ�c�q՝��ʐ��,���3�f2U�եmab��#ŠdQ�y>\��)�SLY����w#��.���ʑ�f��� ,"+�w�~�N�'�c�O�3F�������N<���)j��&��,-� �љ���֊�_�zS���TǦ����w�>��?�������n��U仆�V���e�����0���$�C�d���rP �m�׈e�Xm�Vu� �L��.�bֹ��� �[Դaզ���*��\y�8�Է:�Ez\�0�Kq�C b��̘��cө���Q��=0Y��s�N��S.���3.���O�o:���#���v7�[#߫ ��5�܎�L���Er4���9n��COWlG�^��0k�%<���ZB���aB_���������'=��{i�v�l�$�uC���mƎҝ{�c㱼�y]���W�i ��ߧc��m�H� m�"�"�����;Y�ߝ�Z�Ǔ�����:S#��|}�y�,/k�Ld� TA�(�AI$+I3��;Y*���Z��}|��ӧO��d�v��..#:n��f>�>���ȶI�TX��� 8��y����"d�R�|�)0���=���n4��6ⲑ�+��r<�O�܂~zh�z����7ܓ�HH�Ga롏���nCo�>������a ���~]���R���̲c?�6(�q�;5%� |�uj�~z8R=X��I�V=�|{v�Gj\gc��q����z�؋%M�ߍ����1y��#��@f^���^�>N�����#x#۹��6�Y~�?�dfPO��{��P�4��V��u1E1J �*|���%���JN��`eWu�zk M6���q t[�� ��g�G���v��WIG��u_ft����5�j�"�Y�:T��ɐ���*�;� e5���4����q$C��2d�}���� _S�L#m�Yp��O�.�C�;��c����Hi#֩%+) �Ӎ��ƲV���SYź��g |���tj��3�8���r|���V��1#;.SQ�A[���S������#���`n�+���$��$I �P\[�@�s��(�ED�z���P��])8�G#��0B��[ى��X�II�q<��9�~[Z멜�Z�⊔IWU&A>�P~�#��dp<�?����7���c��'~���5 ��+$���lx@�M�dm��n<=e�dyX��?{�|Aef ,|n3�<~z�ƃ�uۧ�����P��Y,�ӥQ�*g�#먙R�\���;T��i,��[9Qi歉����c>]9�� ��"�c��P�� �Md?٥��If�ت�u��k��/����F��9�c*9��Ǎ:�ØF���z�n*�@|I�ށ9����N3{'��[�'ͬ�Ҳ4��#}��!�V� Fu��,�,mTIk���v C�7v���B�6k�T9��1�*l� '~��ƞF��lU��'�M ����][ΩũJ_�{�i�I�n��$���L�� j��O�dx�����kza۪��#�E��Cl����x˘�o�����V���ɞ�ljr��)�/,�߬h�L��#��^��L�ф�,íMƁe�̩�NB�L�����iL����q�}��(��q��6IçJ$�W�E$��:������=#����(�K�B����zђ <��K(�N�۫K�w��^O{!����)�H���>x�������lx�?>Պ�+�>�W���,Ly!_�D���Ō�l���Q�!�[ �S����J��1��Ɛ�Y}��b,+�Lo�x�ɓ)����=�y�oh�@�꥟/��I��ѭ=��P�y9��� �ۍYӘ�e+�p�Jnϱ?V\SO%�(�t� ���=?MR�[Ș�����d�/ ��n�l��B�7j� ��!�;ӥ�/�[-���A�>�dN�sLj ��,ɪv��=1c�.SQ�O3�U���ƀ�ܽ�E����������̻��9G�ϷD�7(�}��Ävӌ\�y�_0[w ���<΍>����a_��[0+�L��F.�޺��f�>oN�T����q;���y\��bՃ��y�jH�<|q-eɏ�_?_9+P���Hp$�����[ux�K w�Mw��N�ی'$Y2�=��q���KB��P��~������Yul:�[<����F1�2�O���5=d����]Y�sw:���Ϯ���E��j,_Q��X��z`H1,#II ��d�wr��P˂@�ZJV����y$�\y�{}��^~���[:N����ߌ�U�������O��d�����ؾe��${p>G��3c���Ė�lʌ�� ת��[��`ϱ�-W����dg�I��ig2��� ��}s ��ؤ(%#sS@���~���3�X�nRG�~\jc3�v��ӍL��M[JB�T��s3}��j�Nʖ��W����;7��ç?=X�F=-�=����q�ߚ���#���='�c��7���ڑW�I(O+=:uxq�������������e2�zi+�kuG�R��������0�&e�n���iT^J����~\jy���p'dtG��s����O��3����9* �b#Ɋ�� p������[Bws�T�>d4�ۧs���nv�n���U���_�~,�v����ƜJ1��s�� �QIz��)�(lv8M���U=�;����56��G���s#�K���MP�=��LvyGd��}�VwWBF�'�à �?MH�U�g2�� ����!�p�7Q��j��ڴ����=��j�u��� Jn�A s���uM������e��Ɔ�Ҕ�!)'��8Ϣ�ٔ��ޝ(��Vp���צ֖d=�IC�J�Ǡ{q������kԭ�߸���i��@K����u�|�p=..�*+����x�����z[Aqġ#s2a�Ɗ���RR�)*HRsi�~�a &f��M��P����-K�L@��Z��Xy�'x�{}��Zm+���:�)�) IJ�-i�u���� ���ܒH��'�L(7�y�GӜq���� j��� 6ߌg1�g�o���,kر���tY�?W,���p���e���f�OQS��!K�۟cҒA�|ս�j�>��=⬒��˧L[�� �߿2JaB~R��u�:��Q�] �0H~���]�7��Ƽ�I���(}��cq '�ήET���q�?f�ab���ӥvr� �)o��-Q��_'����ᴎo��K������;��V���o��%���~OK ����*��b�f:���-ťIR��`B�5!RB@���ï�� �u �̯e\�_U�_������� g�ES��3�������QT��a����x����U<~�c?�*�#]�MW,[8O�a�x��]�1bC|踤�P��lw5V%�)�{t�<��d��5���0i�XSU��m:��Z�┵�i�"��1�^B�-��P�hJ��&)O��*�D��c�W��vM��)����}���P��ܗ-q����\mmζZ-l@�}��a��E�6��F�@��&Sg@���ݚ�M����� ȹ 4����#p�\H����dYDo�H���"��\��..R�B�H�z_�/5˘����6��KhJR��P�mƶi�m���3�,#c�co��q�a)*Pt����R�m�k�7x�D�E�\Y�閣_X�<���~�)���c[[�BP����6�Yq���S��0����%_����;��Àv�~�| VS؇ ��'O0��F0��\���U�-�d@�����7�SJ*z��3n��y��P����O���������m�~�P�3|Y��ʉr#�C�<�G~�.,! ���bqx���h~0=��!ǫ�jy����l�O,�[B��~��|9��ٱ����Xly�#�i�B��g%�S��������tˋ���e���ې��\[d�t)��.+u�|1 ������#�~Oj����hS�%��i.�~X���I�H�m��0n���c�1uE�q��cF�RF�o���7� �O�ꮧ� ���ۛ{��ʛi5�rw?׌#Qn�TW��~?y$��m\�\o����%W� ?=>S�N@�� �Ʈ���R����N�)�r"C�:��:����� �����#��qb��Y�. �6[��2K����2u�Ǧ�HYR��Q�MV��� �G�$��Q+.>�����nNH��q�^��� ����q��mM��V��D�+�-�#*�U�̒ ���p욳��u:�������IB���m���PV@O���r[b= �� ��1U�E��_Nm�yKbN�O���U�}�the�`�|6֮P>�\2�P�V���I�D�i�P�O;�9�r�mAHG�W�S]��J*�_�G��+kP�2����Ka�Z���H�'K�x�W�MZ%�O�YD�Rc+o��?�q��Ghm��d�S�oh�\�D�|:W������UA�Qc yT�q������~^�H��/��#p�CZ���T�I�1�ӏT����4��"�ČZ�����}��`w�#�*,ʹ�� ��0�i��課�Om�*�da��^gJ݅{���l�e9uF#T�ֲ��̲�ٞC"�q���ߍ ոޑ�o#�XZTp����@ o�8��(jd��xw�]�,f���`~�|,s��^����f�1���t��|��m�򸄭/ctr��5s��7�9Q�4�H1꠲BB@l9@���C�����+�wp�xu�£Yc�9��?`@#�o�mH�s2��)�=��2�.�l����jg�9$�Y�S�%*L������R�Y������7Z���,*=�䷘$�������arm�o�ϰ���UW.|�r�uf����IGw�t����Zwo��~5 ��YյhO+=8fF�)�W�7�L9lM�̘·Y���֘YLf�큹�pRF���99.A �"wz��=E\Z���'a� 2��Ǚ�#;�'}�G���*��l��^"q��+2FQ� hj��kŦ��${���ޮ-�T�٭cf�|�3#~�RJ����t��$b�(R��(����r���dx� >U b�&9,>���%E\� Ά�e�$��'�q't��*�א���ެ�b��-|d���SB�O�O��$�R+�H�)�܎�K��1m`;�J�2�Y~9��O�g8=vqD`K[�F)k�[���1m޼c��n���]s�k�z$@��)!I �x՝"v��9=�ZA=`Ɠi �:�E��)`7��vI��}d�YI�_ �o�:ob���o ���3Q��&D&�2=�� �Ά��;>�h����y.*ⅥS������Ӭ�+q&����j|UƧ����}���J0��WW< ۋS�)jQR�j���Ư��rN)�Gű�4Ѷ(�S)Ǣ�8��i��W52���No˓� ۍ%�5brOn�L�;�n��\G����=�^U�dI���8$�&���h��'���+�(������cȁ߫k�l��S^���cƗjԌE�ꭔ��gF���Ȓ��@���}O���*;e�v�WV���YJ\�]X'5��ղ�k�F��b 6R�o՜m��i N�i����>J����?��lPm�U��}>_Z&�KK��q�r��I�D�Չ~�q�3fL�:S�e>���E���-G���{L�6p�e,8��������QI��h��a�Xa��U�A'���ʂ���s�+טIjP�-��y�8ۈZ?J$��W�P� ��R�s�]��|�l(�ԓ��sƊi��o(��S0��Y� 8�T97.�����WiL��c�~�dxc�E|�2!�X�K�Ƙਫ਼�$((�6�~|d9u+�qd�^3�89��Y�6L�.I�����?���iI�q���9�)O/뚅����O���X��X�V��ZF[�یgQ�L��K1���RҖr@v�#��X�l��F���Нy�S�8�7�kF!A��sM���^rkp�jP�DyS$N���q��nxҍ!U�f�!eh�i�2�m���`�Y�I�9r�6� �TF���C}/�y�^���Η���5d�'��9A-��J��>{�_l+�`��A���[�'��յ�ϛ#w:݅�%��X�}�&�PSt�Q�"�-��\縵�/����$Ɨh�Xb�*�y��BS����;W�ջ_mc�����vt?2}1�;qS�d�d~u:2k5�2�R�~�z+|HE!)�Ǟl��7`��0�<�,�2*���Hl-��x�^����'_TV�gZA�'j� ^�2Ϊ��N7t�����?w�� �x1��f��Iz�C-Ȗ��K�^q�;���-W�DvT�7��8�Z�������� hK�(P:��Q- �8�n�Z���܃e貾�<�1�YT<�,�����"�6{/ �?�͟��|1�:�#g��W�>$����d��J��d�B��=��jf[��%rE^��il:��B���x���Sּ�1հ��,�=��*�7 fcG��#q� �eh?��2�7�����,�!7x��6�n�LC�4x��},Geǝ�tC.��vS �F�43��zz\��;QYC,6����~;RYS/6���|2���5���v��T��i����������mlv��������&� �nRh^ejR�LG�f���? �ۉҬܦƩ��|��Ȱ����>3����!v��i�ʯ�>�v��オ�X3e���_1z�Kȗ\<������!�8���V��]��?b�k41�Re��T�q��mz��TiOʦ�Z��Xq���L������q"+���2ۨ��8}�&N7XU7Ap�d�X��~�׿��&4e�o�F��� �H����O���č�c�� 懴�6���͉��+)��v;j��ݷ�� �UV�� i��� j���Y9GdÒJ1��詞�����V?h��l����l�cGs�ځ�������y�Ac�����\V3�? �� ܙg�>qH�S,�E�W�[�㺨�uch�⍸�O�}���a��>�q�6�n6����N6�q������N ! 1AQaq�0@����"2BRb�#Pr���3C`��Scst���$4D���%Td�� ?���N����a��3��m���C���w��������xA�m�q�m���m������$����4n淿t'��C"w��zU=D�\R+w�p+Y�T�&�պ@��ƃ��3ޯ?�Aﶂ��aŘ���@-�����Q�=���9D��ռ�ѻ@��M�V��P��܅�G5�f�Y<�u=,EC)�<�Fy'�"�&�չ�X~f��l�KԆV��?�� �W�N����=(� �;���{�r����ٌ�Y���h{�١������jW����P���Tc�����X�K�r��}���w�R��%��?���E��m�� �Y�q|����\lEE4���r���}�lsI�Y������f�$�=�d�yO����p�����yBj8jU�o�/�S��?�U��*������ˍ�0������u�q�m [�?f����a�� )Q�>����6#������� ?����0UQ����,IX���(6ڵ[�DI�MNލ�c&���υ�j\��X�R|,4��� j������T�hA�e��^���d���b<����n�� �즇�=!���3�^�`j�h�ȓr��jẕ�c�,ٞX����-����a�ﶔ���#�$��]w�O��Ӫ�1y%��L�Y<�wg#�ǝ�̗`�x�xa�t�w��»1���o7o5��>�m뭛C���Uƃߜ}�C���y1Xνm�F8�jI���]����H���ۺиE@I�i;r�8ӭ����V�F�Շ| ��&?�3|x�B�MuS�Ge�=Ӕ�#BE5G�����Y!z��_e��q�р/W>|-�Ci߇�t�1ޯќd�R3�u��g�=0 5��[?�#͏��q�cf���H��{ ?u�=?�?ǯ���}Z��z���hmΔ�BFTW�����<�q�(v� ��!��z���iW]*�J�V�z��gX֧A�q�&��/w���u�gYӘa���; �i=����g:��?2�dž6�ى�k�4�>�Pxs����}������G�9��3 ���)gG�R<>r h�$��'nc�h�P��Bj��J�ҧH� -��N1���N��?��~��}-q!=��_2hc�M��l�vY%UE�@|�v����M2�.Y[|y�"Eï��K�ZF,�ɯ?,q�?v�M 80jx�"�;�9vk�����+ ֧�� �ȺU��?�%�vcV��mA�6��Qg^M����A}�3�nl� QRN�l8�kkn�'�����(��M�7m9و�q���%ޟ���*h$Zk"��$�9��: �?U8�Sl��,,|ɒ��xH(ѷ����Gn�/Q�4�P��G�%��Ա8�N��!� �&�7�;���eKM7�4��9R/%����l�c>�x;������>��C�:�����t��h?aKX�bhe�ᜋ^�$�Iհ �hr7%F$�E��Fd���t��5���+�(M6�t����Ü�UU|zW�=a�Ts�Tg������dqP�Q����b'�m���1{|Y����X�N��b �P~��F^F:����k6�"�j!�� �I�r�`��1&�-$�Bevk:y���#yw��I0��x��=D�4��tU���P�ZH��ڠ底taP��6����b>�xa����Q�#� WeF��ŮNj�p�J* mQ�N����*I�-*�ȩ�F�g�3 �5��V�ʊ�ɮ�a��5F���O@{���NX��?����H�]3��1�Ri_u��������ѕ�� ����0��� F��~��:60�p�͈�S��qX#a�5>���`�o&+�<2�D����: �������ڝ�$�nP���*)�N�|y�Ej�F�5ټ�e���ihy�Z �>���k�bH�a�v��h�-#���!�Po=@k̆IEN��@��}Ll?j�O������߭�ʞ���Q|A07x���wt!xf���I2?Z��<ץ�T���cU�j��]��陎Ltl �}5�ϓ��$�,��O�mˊ�;�@O��jE��j(�ا,��LX���LO���Ц�90�O �.����a��nA���7������j4 ��W��_ٓ���zW�jcB������y՗+EM�)d���N�g6�y1_x��p�$Lv:��9�"z��p���ʙ$��^��JԼ*�ϭ����o���=x�Lj�6�J��u82�A�H�3$�ٕ@�=Vv�]�'�qEz�;I˼��)��=��ɯ���x �/�W(V���p�����$ �m�������u�����񶤑Oqˎ�T����r��㠚x�sr�GC��byp�G��1ߠ�w e�8�$⿄����/�M{*}��W�]˷.�CK\�ުx���/$�WPw���r� |i���&�}�{�X� �>��$-��l���?-z���g����lΆ���(F���h�vS*���b���߲ڡn,|)mrH[���a�3�ר�[1��3o_�U�3�TC�$��(�=�)0�kgP���� ��u�^=��4 �WYCҸ:��vQ�ר�X�à��tk�m,�t*��^�,�}D*� �"(�I��9R����>`�`��[~Q]�#af��i6l��8���6�:,s�s�N6�j"�A4���IuQ��6E,�GnH��zS�HO�uk�5$�I�4��ؤ�Q9�@��C����wp�BGv[]�u�Ov���0I4���\��y�����Q�Ѹ��~>Z��8�T��a��q�ޣ;z��a���/��S��I:�ܫ_�|������>=Z����8:�S��U�I�J��"IY���8%b8���H��:�QO�6�;7�I�S��J��ҌAά3��>c���E+&jf$eC+�z�;��V����� �r���ʺ������my�e���aQ�f&��6�ND��.:��NT�vm�<- u���ǝ\MvZY�N�NT��-A�>jr!S��n�O 1�3�Ns�%�3D@���`������ܟ 1�^c<���� �a�ɽ�̲�Xë#�w�|y�cW�=�9I*H8�p�^(4���՗�k��arOcW�tO�\�ƍR��8����'�K���I�Q�����?5�>[�}��yU�ײ -h��=��% q�ThG�2�)���"ו3]�!kB��*p�FDl�A���,�eEi�H�f�Ps�����5�H:�Փ~�H�0Dت�D�I����h�F3�������c��2���E��9�H��5�zԑ�ʚ�i�X�=:m�xg�hd(�v����׊�9iS��O��d@0ڽ���:�p�5�h-��t�&���X�q�ӕ,��ie�|���7A�2���O%P��E��htj��Y1��w�Ѓ!����  ���� ࢽ��My�7�\�a�@�ţ�J �4�Ȼ�F�@o�̒?4�wx��)��]�P��~�����u�����5�����7X ��9��^ܩ�U;Iꭆ 5 �������eK2�7(�{|��Y׎ �V��\"���Z�1� Z�����}��(�Ǝ"�1S���_�vE30>���p;� ΝD��%x�W�?W?v����o�^V�i�d��r[��/&>�~`�9Wh��y�;���R��� ;;ɮT��?����r$�g1�K����A��C��c��K��l:�'��3 c�ﳯ*"t8�~l��)���m��+U,z��`(�>yJ�?����h>��]��v��ЍG*�{`��;y]��I�T� ;c��NU�fo¾h���/$���|NS���1�S�"�H��V���T���4��uhǜ�]�v;���5�͠x��'C\�SBpl���h}�N����� A�Bx���%��ޭ�l��/����T��w�ʽ]D�=����K���ž�r㻠l4�S�O?=�k �M:� ��c�C�a�#ha���)�ѐxc�s���gP�iG��{+���x���Q���I= �� z��ԫ+ �8"�k�ñ�j=|����c ��y��CF��/��*9ж�h{ �?4�o� ��k�m�Q�N�x��;�Y��4膚�a�w?�6�>e]�����Q�r�:����g�,i"�����ԩA�*M�<�G��b�if��l^M��5� �Ҩ�{����6J��ZJ�����P�*�����Y���ݛu�_4�9�I8�7���������,^ToR���m4�H��?�N�S�ѕw��/S��甍�@�9H�S�T��t�ƻ���ʒU��*{Xs�@����f�����֒Li�K{H�w^���������Ϥm�tq���s� ���ք��f:��o~s��g�r��ט� �S�ѱC�e]�x���a��) ���(b-$(�j>�7q�B?ӕ�F��hV25r[7 Y� }L�R��}����*sg+��x�r�2�U=�*'WS��ZDW]�WǞ�<��叓���{�$�9Ou4��y�90-�1�'*D`�c�^o?(�9��u���ݐ��'PI&� f�Jݮ�������:wS����jfP1F:X �H�9dԯ���˝[�_54 �}*;@�ܨ�� ð�yn�T���?�ןd�#���4rG�ͨ��H�1�|-#���Mr�S3��G�3�����)�.᧏3v�z֑��r����$G"�`j �1t��x0<Ɔ�Wh6�y�6��,œ�Ga��gA����y��b��)��h�D��ß�_�m��ü �gG;��e�v��ݝ�nQ� ��C����-�*��o���y�a��M��I�>�<���]obD��"�:���G�A��-\%LT�8���c�)��+y76���o�Q�#*{�(F�⽕�y����=���rW�\p���۩�c���A���^e6��K������ʐ�cVf5$�'->���ՉN"���F�"�UQ@�f��Gb~��#�&�M=��8�ט�JNu9��D��[̤�s�o�~������ G��9T�tW^g5y$b��Y'��س�Ǵ�=��U-2 #�MC�t(�i� �lj�@Q 5�̣i�*�O����s�x�K�f��}\��M{E�V�{�υ��Ƈ�����);�H����I��fe�Lȣr�2��>��W�I�Ȃ6������i��k�� �5�YOxȺ����>��Y�f5'��|��H+��98pj�n�.O�y�������jY��~��i�w'������l�;�s�2��Y��:'lg�ꥴ)o#'Sa�a�K��Z� �m��}�`169�n���"���x��I ��*+� }F<��cГ���F�P�������ֹ*�PqX�x۩��,� ��N�� �4<-����%����:��7����W���u�`����� $�?�I��&����o��o��`v�>��P��"��l���4��5'�Z�gE���8���?��[�X�7(��.Q�-��*���ތL@̲����v��.5���[��=�t\+�CNܛ��,g�SQnH����}*F�G16���&:�t��4ُ"A��̣��$�b �|����#rs��a�����T�� ]�<�j��BS�('$�ɻ� �wP;�/�n��?�ݜ��x�F��yUn�~mL*-�������Xf�wd^�a�}��f�,=t�׵i�.2/wpN�Ep8�OР���•��R�FJ� 55TZ��T �ɭ�<��]��/�0�r�@�f��V��V����Nz�G��^���7hZi����k��3�,kN�e|�vg�1{9]_i��X5y7� 8e]�U����'�-2,���e"����]ot�I��Y_��n�(JҼ��1�O ]bXc���Nu�No��pS���Q_���_�?i�~�x h5d'�(qw52] ��'ޤ�q��o1�R!���`ywy�A4u���h<קy���\[~�4�\ X�Wt/� 6�����n�F�a8��f���z �3$�t(���q��q�x��^�XWeN'p<-v�!�{�(>ӽDP7��ո0�y)�e$ٕv�Ih'Q�EA�m*�H��RI��=:��� ���4牢) �%_iN�ݧ�l]� �Nt���G��H�L��� ɱ�g<���1V�,�J~�ٹ�"K��Q�� 9�HS�9�?@��k����r�;we݁�]I�!{ �@�G�[�"��`���J:�n]�{�cA�E����V��ʆ���#��U9�6����j�#Y�m\��q�e4h�B�7��C�������d<�?J����1g:ٳ���=Y���D�p�ц� ׈ǔ��1�]26؜oS�'��9�V�FVu�P�h�9�xc�oq�X��p�o�5��Ա5$�9W�V(�[Ak�aY錎qf;�'�[�|���b�6�Ck��)��#a#a˙��8���=äh�4��2��C��4tm^ �n'c���]GQ$[Wҿ��i���vN�{Fu ��1�gx��1┷���N�m��{j-,��x�� Ūm�ЧS�[�s���Gna���䑴�� x�p 8<������97�Q���ϴ�v�aϚG��Rt�Һ׈�f^\r��WH�JU�7Z���y)�vg=����n��4�_)y��D'y�6�]�c�5̪�\� �PF�k����&�c;��cq�$~T�7j ���nç]�<�g ":�to�t}�159�<�/�8������m�b�K#g'I'.W�����6��I/��>v��\�MN��g���m�A�yQL�4u�Lj�j9��#44�t��l^�}L����n��R��!��t��±]��r��h6ٍ>�yҏ�N��fU�� ���� Fm@�8}�/u��jb9������he:A�y�ծw��GpΧh�5����l}�3p468��)U��d��c����;Us/�֔�YX�1�O2��uq�s��`hwg�r~�{ R��mhN��؎*q 42�*th��>�#���E����#��Hv�O����q�}�����6�e��\�,Wk�#���X��b>��p}�դ��3���T5��†��6��[��@�P�y*n��|'f�֧>�lư΂�̺����SU�'*�q�p�_S�����M�� '��c�6�����m�� ySʨ;M��r���Ƌ�m�Kxo,���Gm�P��A�G�:��i��w�9�}M(�^�V��$ǒ�ѽ�9���|���� �a����J�SQ�a���r�B;����}���ٻ֢�2�%U���c�#�g���N�a�ݕ�'�v�[�OY'��3L�3�;,p�]@�S��{ls��X�'���c�jw�k'a�.��}�}&�� �dP�*�bK=ɍ!����;3n�gΊU�ߴmt�'*{,=SzfD� A��ko~�G�aoq�_mi}#�m�������P�Xhύ����mxǍ�΂���巿zf��Q���c���|kc�����?���W��Y�$���_Lv����l߶��c���`?����l�j�ݲˏ!V��6����U�Ђ(A���4y)H���p�Z_�x��>���e��R��$�/�`^'3qˏ�-&Q�=?��CFVR �D�fV�9��{�8g�������n�h�(P"��6�[�D���< E�����~0<@�`�G�6����Hг�cc�� �c�K.5��D��d�B���`?�XQ��2��ٿyqo&+�1^� DW�0�ꊩ���G�#��Q�nL3��c���������/��x ��1�1[y�x�პCW��C�c�UĨ80�m�e�4.{�m��u���I=��f�����0QRls9���f���������9���~f�����Ǩ��a�"@�8���ȁ�Q����#c�ic������G��$���G���r/$W�(��W���V�"��m�7�[m�A�m����bo��D� j����۳� l���^�k�h׽����� ��#� iXn�v��eT�k�a�^Y�4�BN��ĕ��0 !01@Q"2AaPq3BR������?���@4�Q�����T3,���㺠�W�[=JK�Ϟ���2�r^7��vc�:�9 �E�ߴ�w�S#d���Ix��u��:��Hp��9E!�� V 2;73|F��9Y���*ʬ�F��D����u&���y؟��^EA��A��(ɩ���^��GV:ݜDy�`��Jr29ܾ�㝉��[���E;Fzx��YG��U�e�Y�C���� ����v-tx����I�sם�Ę�q��Eb�+P\ :>�i�C'�;�����k|z�رn�y]�#ǿb��Q��������w�����(�r|ӹs��[�D��2v-%��@;�8<a���[\o[ϧw��I!��*0�krs)�[�J9^��ʜ��p1)� "��/_>��o��<1����A�E�y^�C��`�x1'ܣn�p��s`l���fQ��):�l����b>�Me�jH^?�kl3(�z:���1ŠK&?Q�~�{�ٺ�h�y���/�[��V�|6��}�KbX����mn[-��7�5q�94�������dm���c^���h� X��5��<�eޘ>G���-�}�دB�ޟ� ��|�rt�M��V+�]�c?�-#ڛ��^ǂ}���Lkr���O��u�>�-D�ry� D?:ޞ�U��ǜ�7�V��?瓮�"�#���r��չģVR;�n���/_� ؉v�ݶe5d�b9��/O��009�G���5n�W����JpA�*�r9�>�1��.[t���s�F���nQ� V 77R�]�ɫ8����_0<՜�IF�u(v��4��F�k�3��E)��N:��yڮe��P�`�1}�$WS��J�SQ�N�j�ٺ��޵�#l���ј(�5=��5�lǏmoW�v-�1����v,W�mn��߀$x�<����v�j(����c]��@#��1������Ǔ���o'��u+����;G�#�޸��v-lη��/(`i⣍Pm^���ԯ̾9Z��F��������n��1��� ��]�[��)�'������:�֪�W��FC����� �B9،!?���]��V��A�Վ�M��b�w��G F>_DȬ0¤�#�QR�[V��kz���m�w�"��9ZG�7'[��=�Q����j8R?�zf�\a�=��O�U����*oB�A�|G���2�54 �p��.w7� �� ��&������ξxGHp� B%��$g�����t�Џ򤵍z���HN�u�Я�-�'4��0��;_��3 !01"@AQa2Pq#3BR������?��ʩca��en��^��8���<�u#��m*08r��y�N"�<�Ѳ0��@\�p��� �����Kv�D��J8�Fҽ� �f�Y��-m�ybX�NP����}�!*8t(�OqѢ��Q�wW�K��ZD��Δ^e��!� ��B�K��p~�����e*l}z#9ң�k���q#�Ft�o��S�R����-�w�!�S���Ӥß|M�l޶V��!eˈ�8Y���c�ЮM2��tk���� ������J�fS����Ö*i/2�����n]�k�\���|4yX�8��U�P.���Ы[���l��@"�t�<������5�lF���vU�����W��W��;�b�cД^6[#7@vU�xgZv��F�6��Q,K�v��� �+Ъ��n��Ǣ��Ft���8��0��c�@�!�Zq s�v�t�;#](B��-�nῃ~���3g������5�J�%���O������n�kB�ĺ�.r��+���#�N$?�q�/�s�6��p��a����a��J/��M�8��6�ܰ"�*������ɗud"\w���aT(����[��F��U՛����RT�b���n�*��6���O��SJ�.�ij<�v�MT��R\c��5l�sZB>F��<7�;EA��{��E���Ö��1U/�#��d1�a�n.1ě����0�ʾR�h��|�R��Ao�3�m3 ��%�� ���28Q� ��y��φ���H�To�7�lW>����#i`�q���c����a��� �m,B�-j����݋�'mR1Ήt�>��V��p���s�0IbI�C.���1R�ea�����]H�6����������4B>��o��](��$B���m�����a�!=��?�B� K�Ǿ+�Ծ"�n���K��*��+��[T#�{E�J�S����Q�����s�5�:�U�\wĐ�f�3����܆&�)����I���Ԇw��E T�lrTf6Q|R�h:��[K�� �z��c֧�G�C��%\��_�a�84��HcO�bi��ؖV��7H �)*ģK~Xhչ0��4?�0��� �E<���}3���#���u�?�� ��|g�S�6ꊤ�|�I#Hڛ� �ա��w�X��9��7���Ŀ%�SL��y6č��|�F�a 8���b��$�sק�h���b9RAu7�˨p�Č�_\*w��묦��F ����4D~�f����|(�"m���NK��i�S�>�$d7SlA��/�²����SL��|6N�}���S�˯���g��]6��; �#�.��<���q'Q�1|KQ$�����񛩶"�$r�b:���N8�w@��8$�� �AjfG|~�9F ���Y��ʺ��Bwؒ������M:I岎�G��`s�YV5����6��A �b:�W���G�q%l�����F��H���7�������Fsv7��k�� 403WebShell
403Webshell
Server IP : 97.74.90.209  /  Your IP : 216.73.216.15
Web Server : Apache
System : Linux live.indianstaffingfederation.org 4.18.0-553.54.1.el8_10.x86_64 #1 SMP Tue May 27 22:49:52 EDT 2025 x86_64
User : indianstaffing ( 1003)
PHP Version : 8.3.22
Disable Function : exec,passthru,shell_exec,system
MySQL : OFF  |  cURL : ON  |  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/name.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 https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */


#ifndef DNS_NAME_H
#define DNS_NAME_H 1

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

/*! \file dns/name.h
 * \brief
 * Provides facilities for manipulating DNS names and labels, including
 * conversions to and from wire format and text format.
 *
 * Given the large number of names possible in a nameserver, and because
 * names occur in rdata, it was important to come up with a very efficient
 * way of storing name data, but at the same time allow names to be
 * manipulated.  The decision was to store names in uncompressed wire format,
 * and not to make them fully abstracted objects; i.e. certain parts of the
 * server know names are stored that way.  This saves a lot of memory, and
 * makes adding names to messages easy.  Having much of the server know
 * the representation would be perilous, and we certainly don't want each
 * user of names to be manipulating such a low-level structure.  This is
 * where the Names and Labels module comes in.  The module allows name or
 * label handles to be created and attached to uncompressed wire format
 * regions.  All name operations and conversions are done through these
 * handles.
 *
 * MP:
 *\li	Clients of this module must impose any required synchronization.
 *
 * Reliability:
 *\li	This module deals with low-level byte streams.  Errors in any of
 *	the functions are likely to crash the server or corrupt memory.
 *
 * Resources:
 *\li	None.
 *
 * Security:
 *
 *\li	*** WARNING ***
 *
 *\li	dns_name_fromwire() deals with raw network data.  An error in
 *	this routine could result in the failure or hijacking of the server.
 *
 * Standards:
 *\li	RFC1035
 *\li	Draft EDNS0 (0)
 *\li	Draft Binary Labels (2)
 *
 */

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

#include <stdio.h>
#include <inttypes.h>
#include <stdbool.h>

#include <isc/ht.h>
#include <isc/lang.h>
#include <isc/magic.h>
#include <isc/region.h>		/* Required for storage size of dns_label_t. */

#include <dns/types.h>

ISC_LANG_BEGINDECLS

/*****
 ***** Labels
 *****
 ***** A 'label' is basically a region.  It contains one DNS wire format
 ***** label of type 00 (ordinary).
 *****/

/*****
 ***** Names
 *****
 ***** A 'name' is a handle to a binary region.  It contains a sequence of one
 ***** or more DNS wire format labels of type 00 (ordinary).
 ***** Note that all names are not required to end with the root label,
 ***** as they are in the actual DNS wire protocol.
 *****/

/***
 *** Types
 ***/

/*%
 * Clients are strongly discouraged from using this type directly,  with
 * the exception of the 'link' and 'list' fields which may be used directly
 * for whatever purpose the client desires.
 */
struct dns_name {
	unsigned int			magic;
	unsigned char *			ndata;
	unsigned int			length;
	unsigned int			labels;
	unsigned int			attributes;
	unsigned char *			offsets;
	isc_buffer_t *			buffer;
	ISC_LINK(dns_name_t)		link;
	ISC_LIST(dns_rdataset_t)	list;
	isc_ht_t *ht;
};

#define DNS_NAME_MAGIC			ISC_MAGIC('D','N','S','n')

#define DNS_NAMEATTR_ABSOLUTE		0x00000001
#define DNS_NAMEATTR_READONLY		0x00000002
#define DNS_NAMEATTR_DYNAMIC		0x00000004
#define DNS_NAMEATTR_DYNOFFSETS		0x00000008
#define DNS_NAMEATTR_NOCOMPRESS		0x00000010
/*
 * Attributes below 0x0100 reserved for name.c usage.
 */
#define DNS_NAMEATTR_CACHE		0x00000100	/*%< Used by resolver. */
#define DNS_NAMEATTR_ANSWER		0x00000200	/*%< Used by resolver. */
#define DNS_NAMEATTR_NCACHE		0x00000400	/*%< Used by resolver. */
#define DNS_NAMEATTR_CHAINING		0x00000800	/*%< Used by resolver. */
#define DNS_NAMEATTR_CHASE		0x00001000	/*%< Used by resolver. */
#define DNS_NAMEATTR_WILDCARD		0x00002000	/*%< Used by server. */
#define DNS_NAMEATTR_PREREQUISITE	0x00004000	/*%< Used by client. */
#define DNS_NAMEATTR_UPDATE		0x00008000	/*%< Used by client. */
#define DNS_NAMEATTR_HASUPDATEREC	0x00010000	/*%< Used by client. */

/*
 * Various flags.
 */
#define DNS_NAME_DOWNCASE		0x0001
#define DNS_NAME_CHECKNAMES		0x0002		/*%< Used by rdata. */
#define DNS_NAME_CHECKNAMESFAIL		0x0004		/*%< Used by rdata. */
#define DNS_NAME_CHECKREVERSE		0x0008		/*%< Used by rdata. */
#define DNS_NAME_CHECKMX		0x0010		/*%< Used by rdata. */
#define DNS_NAME_CHECKMXFAIL		0x0020		/*%< Used by rdata. */

LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_rootname;
LIBDNS_EXTERNAL_DATA extern dns_name_t *dns_wildcardname;

/*%<
 * DNS_NAME_INITNONABSOLUTE and DNS_NAME_INITABSOLUTE are macros for
 * initializing dns_name_t structures.
 *
 * Note[1]: 'length' is set to (sizeof(A) - 1) in DNS_NAME_INITNONABSOLUTE
 * and sizeof(A) in DNS_NAME_INITABSOLUTE to allow C strings to be used
 * to initialize 'ndata'.
 *
 * Note[2]: The final value of offsets for DNS_NAME_INITABSOLUTE should
 * match (sizeof(A) - 1) which is the offset of the root label.
 *
 * Typical usage:
 *	unsigned char data[] = "\005value";
 *	unsigned char offsets[] = { 0 };
 *	dns_name_t value = DNS_NAME_INITNONABSOLUTE(data, offsets);
 *
 *	unsigned char data[] = "\005value";
 *	unsigned char offsets[] = { 0, 6 };
 *	dns_name_t value = DNS_NAME_INITABSOLUTE(data, offsets);
 */
#define DNS_NAME_INITNONABSOLUTE(A,B) { \
	DNS_NAME_MAGIC, \
	A, (sizeof(A) - 1), sizeof(B), \
	DNS_NAMEATTR_READONLY, \
	B, NULL, { (void *)-1, (void *)-1}, \
	{NULL, NULL}, NULL			    \
}

#define DNS_NAME_INITABSOLUTE(A,B) { \
	DNS_NAME_MAGIC, \
	A, sizeof(A), sizeof(B), \
	DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, \
	B, NULL, { (void *)-1, (void *)-1}, \
	{NULL, NULL}, NULL			    \
}

#define DNS_NAME_INITEMPTY { \
	DNS_NAME_MAGIC, NULL, 0, 0, 0, NULL, NULL, \
	{ (void *)-1, (void *)-1 }, { NULL, NULL }, NULL	\
}

/*%
 * Standard size of a wire format name
 */
#define DNS_NAME_MAXWIRE 255

/*
 * Text output filter procedure.
 * 'target' is the buffer to be converted.  The region to be converted
 * is from 'buffer'->base + 'used_org' to the end of the used region.
 */
typedef isc_result_t (*dns_name_totextfilter_t)(isc_buffer_t *target,
						unsigned int used_org,
						bool absolute);

/***
 *** Initialization
 ***/

void
dns_name_init(dns_name_t *name, unsigned char *offsets);
/*%<
 * Initialize 'name'.
 *
 * Notes:
 * \li	'offsets' is never required to be non-NULL, but specifying a
 *	dns_offsets_t for 'offsets' will improve the performance of most
 *	name operations if the name is used more than once.
 *
 * Requires:
 * \li	'name' is not NULL and points to a struct dns_name.
 *
 * \li	offsets == NULL or offsets is a dns_offsets_t.
 *
 * Ensures:
 * \li	'name' is a valid name.
 * \li	dns_name_countlabels(name) == 0
 * \li	dns_name_isabsolute(name) == false
 */

void
dns_name_reset(dns_name_t *name);
/*%<
 * Reinitialize 'name'.
 *
 * Notes:
 * \li	This function distinguishes itself from dns_name_init() in two
 *	key ways:
 *
 * \li	+ If any buffer is associated with 'name' (via dns_name_setbuffer()
 *	  or by being part of a dns_fixedname_t) the link to the buffer
 *	  is retained but the buffer itself is cleared.
 *
 * \li	+ Of the attributes associated with 'name', all are retained except
 *	  DNS_NAMEATTR_ABSOLUTE.
 *
 * Requires:
 * \li	'name' is a valid name.
 *
 * Ensures:
 * \li	'name' is a valid name.
 * \li	dns_name_countlabels(name) == 0
 * \li	dns_name_isabsolute(name) == false
 */

void
dns_name_invalidate(dns_name_t *name);
/*%<
 * Make 'name' invalid.
 *
 * Requires:
 * \li	'name' is a valid name.
 *
 * Ensures:
 * \li	If assertion checking is enabled, future attempts to use 'name'
 *	without initializing it will cause an assertion failure.
 *
 * \li	If the name had a dedicated buffer, that association is ended.
 */

bool
dns_name_isvalid(const dns_name_t *name);
/*%<
 * Check whether 'name' points to a valid dns_name
 */

/***
 *** Dedicated Buffers
 ***/

void
dns_name_setbuffer(dns_name_t *name, isc_buffer_t *buffer);
/*%<
 * Dedicate a buffer for use with 'name'.
 *
 * Notes:
 * \li	Specification of a target buffer in dns_name_fromwire(),
 *	dns_name_fromtext(), and dns_name_concatenate() is optional if
 *	'name' has a dedicated buffer.
 *
 * \li	The caller must not write to buffer until the name has been
 *	invalidated or is otherwise known not to be in use.
 *
 * \li	If buffer is NULL and the name previously had a dedicated buffer,
 *	than that buffer is no longer dedicated to use with this name.
 *	The caller is responsible for ensuring that the storage used by
 *	the name remains valid.
 *
 * Requires:
 * \li	'name' is a valid name.
 *
 * \li	'buffer' is a valid binary buffer and 'name' doesn't have a
 *	dedicated buffer already, or 'buffer' is NULL.
 */

bool
dns_name_hasbuffer(const dns_name_t *name);
/*%<
 * Does 'name' have a dedicated buffer?
 *
 * Requires:
 * \li	'name' is a valid name.
 *
 * Returns:
 * \li	true	'name' has a dedicated buffer.
 * \li	false	'name' does not have a dedicated buffer.
 */

/***
 *** Properties
 ***/

bool
dns_name_isabsolute(const dns_name_t *name);
/*%<
 * Does 'name' end in the root label?
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * Returns:
 * \li	TRUE		The last label in 'name' is the root label.
 * \li	FALSE		The last label in 'name' is not the root label.
 */

bool
dns_name_iswildcard(const dns_name_t *name);
/*%<
 * Is 'name' a wildcard name?
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * \li	dns_name_countlabels(name) > 0
 *
 * Returns:
 * \li	TRUE		The least significant label of 'name' is '*'.
 * \li	FALSE		The least significant label of 'name' is not '*'.
 */

unsigned int
dns_name_hash(dns_name_t *name, bool case_sensitive);
/*%<
 * Provide a hash value for 'name'.
 *
 * Note: if 'case_sensitive' is false, then names which differ only in
 * case will have the same hash value.
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * Returns:
 * \li	A hash value
 */

unsigned int
dns_name_fullhash(dns_name_t *name, bool case_sensitive);
/*%<
 * Provide a hash value for 'name'.  Unlike dns_name_hash(), this function
 * always takes into account of the entire name to calculate the hash value.
 *
 * Note: if 'case_sensitive' is false, then names which differ only in
 * case will have the same hash value.
 *
 * Requires:
 *\li	'name' is a valid name
 *
 * Returns:
 *\li	A hash value
 */

unsigned int
dns_name_hashbylabel(dns_name_t *name, bool case_sensitive);
/*%<
 * Provide a hash value for 'name', where the hash value is the sum
 * of the hash values of each label.  This function should only be used
 * when incremental hashing is necessary, for example, during RBT
 * traversal. It is not currently used in BIND. Generally,
 * dns_name_fullhash() is the correct function to use for name
 * hashing.
 *
 * Note: if 'case_sensitive' is false, then names which differ only in
 * case will have the same hash value.
 *
 * Requires:
 *\li	'name' is a valid name
 *
 * Returns:
 *\li	A hash value
 */

/*
 *** Comparisons
 ***/

dns_namereln_t
dns_name_fullcompare(const dns_name_t *name1, const dns_name_t *name2,
		     int *orderp, unsigned int *nlabelsp);
/*%<
 * Determine the relative ordering under the DNSSEC order relation of
 * 'name1' and 'name2', and also determine the hierarchical
 * relationship of the names.
 *
 * Note: It makes no sense for one of the names to be relative and the
 * other absolute.  If both names are relative, then to be meaningfully
 * compared the caller must ensure that they are both relative to the
 * same domain.
 *
 * Requires:
 *\li	'name1' is a valid name
 *
 *\li	dns_name_countlabels(name1) > 0
 *
 *\li	'name2' is a valid name
 *
 *\li	dns_name_countlabels(name2) > 0
 *
 *\li	orderp and nlabelsp are valid pointers.
 *
 *\li	Either name1 is absolute and name2 is absolute, or neither is.
 *
 * Ensures:
 *
 *\li	*orderp is < 0 if name1 < name2, 0 if name1 = name2, > 0 if
 *	name1 > name2.
 *
 *\li	*nlabelsp is the number of common significant labels.
 *
 * Returns:
 *\li	dns_namereln_none		There's no hierarchical relationship
 *					between name1 and name2.
 *\li	dns_namereln_contains		name1 properly contains name2; i.e.
 *					name2 is a proper subdomain of name1.
 *\li	dns_namereln_subdomain		name1 is a proper subdomain of name2.
 *\li	dns_namereln_equal		name1 and name2 are equal.
 *\li	dns_namereln_commonancestor	name1 and name2 share a common
 *					ancestor.
 */

int
dns_name_compare(const dns_name_t *name1, const dns_name_t *name2);
/*%<
 * Determine the relative ordering under the DNSSEC order relation of
 * 'name1' and 'name2'.
 *
 * Note: It makes no sense for one of the names to be relative and the
 * other absolute.  If both names are relative, then to be meaningfully
 * compared the caller must ensure that they are both relative to the
 * same domain.
 *
 * Requires:
 * \li	'name1' is a valid name
 *
 * \li	'name2' is a valid name
 *
 * \li	Either name1 is absolute and name2 is absolute, or neither is.
 *
 * Returns:
 * \li	< 0		'name1' is less than 'name2'
 * \li	0		'name1' is equal to 'name2'
 * \li	> 0		'name1' is greater than 'name2'
 */

bool
dns_name_equal(const dns_name_t *name1, const dns_name_t *name2);
/*%<
 * Are 'name1' and 'name2' equal?
 *
 * Notes:
 * \li	Because it only needs to test for equality, dns_name_equal() can be
 *	significantly faster than dns_name_fullcompare() or dns_name_compare().
 *
 * \li	Offsets tables are not used in the comparison.
 *
 * \li	It makes no sense for one of the names to be relative and the
 *	other absolute.  If both names are relative, then to be meaningfully
 * 	compared the caller must ensure that they are both relative to the
 * 	same domain.
 *
 * Requires:
 * \li	'name1' is a valid name
 *
 * \li	'name2' is a valid name
 *
 * \li	Either name1 is absolute and name2 is absolute, or neither is.
 *
 * Returns:
 * \li	true	'name1' and 'name2' are equal
 * \li	false	'name1' and 'name2' are not equal
 */

bool
dns_name_caseequal(const dns_name_t *name1, const dns_name_t *name2);
/*%<
 * Case sensitive version of dns_name_equal().
 */

int
dns_name_rdatacompare(const dns_name_t *name1, const dns_name_t *name2);
/*%<
 * Compare two names as if they are part of rdata in DNSSEC canonical
 * form.
 *
 * Requires:
 * \li	'name1' is a valid absolute name
 *
 * \li	dns_name_countlabels(name1) > 0
 *
 * \li	'name2' is a valid absolute name
 *
 * \li	dns_name_countlabels(name2) > 0
 *
 * Returns:
 * \li	< 0		'name1' is less than 'name2'
 * \li	0		'name1' is equal to 'name2'
 * \li	> 0		'name1' is greater than 'name2'
 */

bool
dns_name_issubdomain(const dns_name_t *name1, const dns_name_t *name2);
/*%<
 * Is 'name1' a subdomain of 'name2'?
 *
 * Notes:
 * \li	name1 is a subdomain of name2 if name1 is contained in name2, or
 *	name1 equals name2.
 *
 * \li	It makes no sense for one of the names to be relative and the
 *	other absolute.  If both names are relative, then to be meaningfully
 *	compared the caller must ensure that they are both relative to the
 *	same domain.
 *
 * Requires:
 * \li	'name1' is a valid name
 *
 * \li	'name2' is a valid name
 *
 * \li	Either name1 is absolute and name2 is absolute, or neither is.
 *
 * Returns:
 * \li	TRUE		'name1' is a subdomain of 'name2'
 * \li	FALSE		'name1' is not a subdomain of 'name2'
 */

bool
dns_name_matcheswildcard(const dns_name_t *name, const dns_name_t *wname);
/*%<
 * Does 'name' match the wildcard specified in 'wname'?
 *
 * Notes:
 * \li	name matches the wildcard specified in wname if all labels
 *	following the wildcard in wname are identical to the same number
 *	of labels at the end of name.
 *
 * \li	It makes no sense for one of the names to be relative and the
 *	other absolute.  If both names are relative, then to be meaningfully
 *	compared the caller must ensure that they are both relative to the
 *	same domain.
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * \li	dns_name_countlabels(name) > 0
 *
 * \li	'wname' is a valid name
 *
 * \li	dns_name_countlabels(wname) > 0
 *
 * \li	dns_name_iswildcard(wname) is true
 *
 * \li	Either name is absolute and wname is absolute, or neither is.
 *
 * Returns:
 * \li	TRUE		'name' matches the wildcard specified in 'wname'
 * \li	FALSE		'name' does not match the wildcard specified in 'wname'
 */

/***
 *** Labels
 ***/

unsigned int
dns_name_countlabels(const dns_name_t *name);
/*%<
 * How many labels does 'name' have?
 *
 * Notes:
 * \li	In this case, as in other places, a 'label' is an ordinary label.
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * Ensures:
 * \li	The result is <= 128.
 *
 * Returns:
 * \li	The number of labels in 'name'.
 */

void
dns_name_getlabel(const dns_name_t *name, unsigned int n, dns_label_t *label);
/*%<
 * Make 'label' refer to the 'n'th least significant label of 'name'.
 *
 * Notes:
 * \li	Numbering starts at 0.
 *
 * \li	Given "rc.vix.com.", the label 0 is "rc", and label 3 is the
 *	root label.
 *
 * \li	'label' refers to the same memory as 'name', so 'name' must not
 *	be changed while 'label' is still in use.
 *
 * Requires:
 * \li	n < dns_name_countlabels(name)
 */

void
dns_name_getlabelsequence(const dns_name_t *source, unsigned int first,
			  unsigned int n, dns_name_t *target);
/*%<
 * Make 'target' refer to the 'n' labels including and following 'first'
 * in 'source'.
 *
 * Notes:
 * \li	Numbering starts at 0.
 *
 * \li	Given "rc.vix.com.", the label 0 is "rc", and label 3 is the
 *	root label.
 *
 * \li	'target' refers to the same memory as 'source', so 'source'
 *	must not be changed while 'target' is still in use.
 *
 * Requires:
 * \li	'source' and 'target' are valid names.
 *
 * \li	first < dns_name_countlabels(name)
 *
 * \li	first + n <= dns_name_countlabels(name)
 */


void
dns_name_clone(const dns_name_t *source, dns_name_t *target);
/*%<
 * Make 'target' refer to the same name as 'source'.
 *
 * Notes:
 *
 * \li	'target' refers to the same memory as 'source', so 'source'
 *	must not be changed while 'target' is still in use.
 *
 * \li	This call is functionally equivalent to:
 *
 * \code
 *		dns_name_getlabelsequence(source, 0,
 *					  dns_name_countlabels(source),
 *					  target);
 * \endcode
 *
 *	but is more efficient.  Also, dns_name_clone() works even if 'source'
 *	is empty.
 *
 * Requires:
 *
 * \li	'source' is a valid name.
 *
 * \li	'target' is a valid name that is not read-only.
 */

/***
 *** Conversions
 ***/

void
dns_name_fromregion(dns_name_t *name, const isc_region_t *r);
/*%<
 * Make 'name' refer to region 'r'.
 *
 * Note:
 * \li	If the conversion encounters a root label before the end of the
 *	region the conversion stops and the length is set to the length
 *	so far converted.  A maximum of 255 bytes is converted.
 *
 * Requires:
 * \li	The data in 'r' is a sequence of one or more type 00 or type 01000001
 *	labels.
 */

void
dns_name_toregion(dns_name_t *name, isc_region_t *r);
/*%<
 * Make 'r' refer to 'name'.
 *
 * Requires:
 *
 * \li	'name' is a valid name.
 *
 * \li	'r' is a valid region.
 */

isc_result_t
dns_name_fromwire(dns_name_t *name, isc_buffer_t *source,
		  dns_decompress_t *dctx, unsigned int options,
		  isc_buffer_t *target);
/*%<
 * Copy the possibly-compressed name at source (active region) into target,
 * decompressing it.
 *
 * Notes:
 * \li	Decompression policy is controlled by 'dctx'.
 *
 * \li	If DNS_NAME_DOWNCASE is set, any uppercase letters in 'source' will be
 *	downcased when they are copied into 'target'.
 *
 * Security:
 *
 * \li	*** WARNING ***
 *
 * \li	This routine will often be used when 'source' contains raw network
 *	data.  A programming error in this routine could result in a denial
 *	of service, or in the hijacking of the server.
 *
 * Requires:
 *
 * \li	'name' is a valid name.
 *
 * \li	'source' is a valid buffer and the first byte of the active
 *	region should be the first byte of a DNS wire format domain name.
 *
 * \li	'target' is a valid buffer or 'target' is NULL and 'name' has
 *	a dedicated buffer.
 *
 * \li	'dctx' is a valid decompression context.
 *
 * Ensures:
 *
 *	If result is success:
 * \li	 	If 'target' is not NULL, 'name' is attached to it.
 *
 * \li		Uppercase letters are downcased in the copy iff
 *		DNS_NAME_DOWNCASE is set in options.
 *
 * \li		The current location in source is advanced, and the used space
 *		in target is updated.
 *
 * Result:
 * \li	Success
 * \li	Bad Form: Label Length
 * \li	Bad Form: Unknown Label Type
 * \li	Bad Form: Name Length
 * \li	Bad Form: Compression type not allowed
 * \li	Bad Form: Bad compression pointer
 * \li	Bad Form: Input too short
 * \li	Resource Limit: Too many compression pointers
 * \li	Resource Limit: Not enough space in buffer
 */

isc_result_t
dns_name_towire(const dns_name_t *name, dns_compress_t *cctx,
		isc_buffer_t *target);
/*%<
 * Convert 'name' into wire format, compressing it as specified by the
 * compression context 'cctx', and storing the result in 'target'.
 *
 * Notes:
 * \li	If the compression context allows global compression, then the
 *	global compression table may be updated.
 *
 * Requires:
 * \li	'name' is a valid name
 *
 * \li	dns_name_countlabels(name) > 0
 *
 * \li	dns_name_isabsolute(name) == TRUE
 *
 * \li	target is a valid buffer.
 *
 * \li	Any offsets specified in a global compression table are valid
 *	for buffer.
 *
 * Ensures:
 *
 *	If the result is success:
 *
 * \li		The used space in target is updated.
 *
 * Returns:
 * \li	Success
 * \li	Resource Limit: Not enough space in buffer
 */

isc_result_t
dns_name_fromtext(dns_name_t *name, isc_buffer_t *source,
		  const dns_name_t *origin, unsigned int options,
		  isc_buffer_t *target);
/*%<
 * Convert the textual representation of a DNS name at source
 * into uncompressed wire form stored in target.
 *
 * Notes:
 * \li	Relative domain names will have 'origin' appended to them
 *	unless 'origin' is NULL, in which case relative domain names
 *	will remain relative.
 *
 * \li	If DNS_NAME_DOWNCASE is set in 'options', any uppercase letters
 *	in 'source' will be downcased when they are copied into 'target'.
 *
 * Requires:
 *
 * \li	'name' is a valid name.
 *
 * \li	'source' is a valid buffer.
 *
 * \li	'target' is a valid buffer or 'target' is NULL and 'name' has
 *	a dedicated buffer.
 *
 * Ensures:
 *
 *	If result is success:
 * \li	 	If 'target' is not NULL, 'name' is attached to it.
 *
 * \li		Uppercase letters are downcased in the copy iff
 *		DNS_NAME_DOWNCASE is set in 'options'.
 *
 * \li		The current location in source is advanced, and the used space
 *		in target is updated.
 *
 * Result:
 *\li	#ISC_R_SUCCESS
 *\li	#DNS_R_EMPTYLABEL
 *\li	#DNS_R_LABELTOOLONG
 *\li	#DNS_R_BADESCAPE
 *\li	#DNS_R_BADDOTTEDQUAD
 *\li	#ISC_R_NOSPACE
 *\li	#ISC_R_UNEXPECTEDEND
 */

#define DNS_NAME_OMITFINALDOT	0x01U
#define DNS_NAME_MASTERFILE	0x02U	/* escape $ and @ */

isc_result_t
dns_name_toprincipal(const dns_name_t *name, isc_buffer_t *target);

isc_result_t
dns_name_totext(const dns_name_t *name, bool omit_final_dot,
		isc_buffer_t *target);

isc_result_t
dns_name_totext2(const dns_name_t *name, unsigned int options,
		 isc_buffer_t *target);
/*%<
 * Convert 'name' into text format, storing the result in 'target'.
 *
 * Notes:
 *\li	If 'omit_final_dot' is true, then the final '.' in absolute
 *	names other than the root name will be omitted.
 *
 *\li	If DNS_NAME_OMITFINALDOT is set in options, then the final '.'
 *	in absolute names other than the root name will be omitted.
 *
 *\li	If DNS_NAME_MASTERFILE is set in options, '$' and '@' will also
 *	be escaped.
 *
 *\li	If dns_name_countlabels == 0, the name will be "@", representing the
 *	current origin as described by RFC1035.
 *
 *\li	The name is not NUL terminated.
 *
 * Requires:
 *
 *\li	'name' is a valid name
 *
 *\li	'target' is a valid buffer.
 *
 *\li	if dns_name_isabsolute == FALSE, then omit_final_dot == FALSE
 *
 * Ensures:
 *
 *\li	If the result is success:
 *		the used space in target is updated.
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOSPACE
 */

#define DNS_NAME_MAXTEXT 1023
/*%<
 * The maximum length of the text representation of a domain
 * name as generated by dns_name_totext().  This does not
 * include space for a terminating NULL.
 *
 * This definition is conservative - the actual maximum
 * is 1004, derived as follows:
 *
 *   A backslash-decimal escaped character takes 4 bytes.
 *   A wire-encoded name can be up to 255 bytes and each
 *   label is one length byte + at most 63 bytes of data.
 *   Maximizing the label lengths gives us a name of
 *   three 63-octet labels, one 61-octet label, and the
 *   root label:
 *
 *      1 + 63 + 1 + 63 + 1 + 63 + 1 + 61 + 1 = 255
 *
 *   When printed, this is (3 * 63 + 61) * 4
 *   bytes for the escaped label data + 4 bytes for the
 *   dot terminating each label = 1004 bytes total.
 */

isc_result_t
dns_name_tofilenametext(dns_name_t *name, bool omit_final_dot,
			isc_buffer_t *target);
/*%<
 * Convert 'name' into an alternate text format appropriate for filenames,
 * storing the result in 'target'.  The name data is downcased, guaranteeing
 * that the filename does not depend on the case of the converted name.
 *
 * Notes:
 *\li	If 'omit_final_dot' is true, then the final '.' in absolute
 *	names other than the root name will be omitted.
 *
 *\li	The name is not NUL terminated.
 *
 * Requires:
 *
 *\li	'name' is a valid absolute name
 *
 *\li	'target' is a valid buffer.
 *
 * Ensures:
 *
 *\li	If the result is success:
 *		the used space in target is updated.
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOSPACE
 */

isc_result_t
dns_name_downcase(dns_name_t *source, dns_name_t *name,
		  isc_buffer_t *target);
/*%<
 * Downcase 'source'.
 *
 * Requires:
 *
 *\li	'source' and 'name' are valid names.
 *
 *\li	If source == name, then
 *		'source' must not be read-only
 *
 *\li	Otherwise,
 *		'target' is a valid buffer or 'target' is NULL and
 *		'name' has a dedicated buffer.
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOSPACE
 *
 * Note: if source == name, then the result will always be ISC_R_SUCCESS.
 */

isc_result_t
dns_name_concatenate(dns_name_t *prefix, dns_name_t *suffix,
		     dns_name_t *name, isc_buffer_t *target);
/*%<
 *	Concatenate 'prefix' and 'suffix'.
 *
 * Requires:
 *
 *\li	'prefix' is a valid name or NULL.
 *
 *\li	'suffix' is a valid name or NULL.
 *
 *\li	'name' is a valid name or NULL.
 *
 *\li	'target' is a valid buffer or 'target' is NULL and 'name' has
 *	a dedicated buffer.
 *
 *\li	If 'prefix' is absolute, 'suffix' must be NULL or the empty name.
 *
 * Ensures:
 *
 *\li	On success,
 *	 	If 'target' is not NULL and 'name' is not NULL, then 'name'
 *		is attached to it.
 *		The used space in target is updated.
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOSPACE
 *\li	#DNS_R_NAMETOOLONG
 */

void
dns_name_split(dns_name_t *name, unsigned int suffixlabels,
	       dns_name_t *prefix, dns_name_t *suffix);
/*%<
 *
 * Split 'name' into two pieces on a label boundary.
 *
 * Notes:
 * \li     'name' is split such that 'suffix' holds the most significant
 *      'suffixlabels' labels.  All other labels are stored in 'prefix'.
 *
 *\li	Copying name data is avoided as much as possible, so 'prefix'
 *	and 'suffix' will end up pointing at the data for 'name'.
 *
 *\li	It is legitimate to pass a 'prefix' or 'suffix' that has
 *	its name data stored someplace other than the dedicated buffer.
 *	This is useful to avoid name copying in the calling function.
 *
 *\li	It is also legitimate to pass a 'prefix' or 'suffix' that is
 *	the same dns_name_t as 'name'.
 *
 * Requires:
 *\li	'name' is a valid name.
 *
 *\li	'suffixlabels' cannot exceed the number of labels in 'name'.
 *
 * \li	'prefix' is a valid name or NULL, and cannot be read-only.
 *
 *\li	'suffix' is a valid name or NULL, and cannot be read-only.
 *
 * Ensures:
 *
 *\li	On success:
 *		If 'prefix' is not NULL it will contain the least significant
 *		labels.
 *		If 'suffix' is not NULL it will contain the most significant
 *		labels.  dns_name_countlabels(suffix) will be equal to
 *		suffixlabels.
 *
 *\li	On failure:
 *		Either 'prefix' or 'suffix' is invalidated (depending
 *		on which one the problem was encountered with).
 *
 * Returns:
 *\li	#ISC_R_SUCCESS	No worries.  (This function should always success).
 */

isc_result_t
dns_name_dup(const dns_name_t *source, isc_mem_t *mctx,
	     dns_name_t *target);
/*%<
 * Make 'target' a dynamically allocated copy of 'source'.
 *
 * Requires:
 *
 *\li	'source' is a valid non-empty name.
 *
 *\li	'target' is a valid name that is not read-only.
 *
 *\li	'mctx' is a valid memory context.
 */

isc_result_t
dns_name_dupwithoffsets(dns_name_t *source, isc_mem_t *mctx,
			dns_name_t *target);
/*%<
 * Make 'target' a read-only dynamically allocated copy of 'source'.
 * 'target' will also have a dynamically allocated offsets table.
 *
 * Requires:
 *
 *\li	'source' is a valid non-empty name.
 *
 *\li	'target' is a valid name that is not read-only.
 *
 *\li	'target' has no offsets table.
 *
 *\li	'mctx' is a valid memory context.
 */

void
dns_name_free(dns_name_t *name, isc_mem_t *mctx);
/*%<
 * Free 'name'.
 *
 * Requires:
 *
 *\li	'name' is a valid name created previously in 'mctx' by dns_name_dup().
 *
 *\li	'mctx' is a valid memory context.
 *
 * Ensures:
 *
 *\li	All dynamic resources used by 'name' are freed and the name is
 *	invalidated.
 */

isc_result_t
dns_name_digest(dns_name_t *name, dns_digestfunc_t digest, void *arg);
/*%<
 * Send 'name' in DNSSEC canonical form to 'digest'.
 *
 * Requires:
 *
 *\li	'name' is a valid name.
 *
 *\li	'digest' is a valid dns_digestfunc_t.
 *
 * Ensures:
 *
 *\li	If successful, the DNSSEC canonical form of 'name' will have been
 *	sent to 'digest'.
 *
 *\li	If digest() returns something other than ISC_R_SUCCESS, that result
 *	will be returned as the result of dns_name_digest().
 *
 * Returns:
 *
 *\li	#ISC_R_SUCCESS
 *
 *\li	Many other results are possible if not successful.
 *
 */

bool
dns_name_dynamic(dns_name_t *name);
/*%<
 * Returns whether there is dynamic memory associated with this name.
 *
 * Requires:
 *
 *\li	'name' is a valid name.
 *
 * Returns:
 *
 *\li	'true' if the name is dynamic otherwise 'false'.
 */

isc_result_t
dns_name_print(dns_name_t *name, FILE *stream);
/*%<
 * Print 'name' on 'stream'.
 *
 * Requires:
 *
 *\li	'name' is a valid name.
 *
 *\li	'stream' is a valid stream.
 *
 * Returns:
 *
 *\li	#ISC_R_SUCCESS
 *
 *\li	Any error that dns_name_totext() can return.
 */

void
dns_name_format(const dns_name_t *name, char *cp, unsigned int size);
/*%<
 * Format 'name' as text appropriate for use in log messages.
 *
 * Store the formatted name at 'cp', writing no more than
 * 'size' bytes.  The resulting string is guaranteed to be
 * null terminated.
 *
 * The formatted name will have a terminating dot only if it is
 * the root.
 *
 * This function cannot fail, instead any errors are indicated
 * in the returned text.
 *
 * Requires:
 *
 *\li	'name' is a valid name.
 *
 *\li	'cp' points a valid character array of size 'size'.
 *
 *\li	'size' > 0.
 *
 */

isc_result_t
dns_name_tostring(dns_name_t *source, char **target, isc_mem_t *mctx);
/*%<
 * Convert 'name' to string format, allocating sufficient memory to
 * hold it (free with isc_mem_free()).
 *
 * Differs from dns_name_format in that it allocates its own memory.
 *
 * Requires:
 *
 *\li	'name' is a valid name.
 *\li	'target' is not NULL.
 *\li	'*target' is NULL.
 *
 * Returns:
 *
 *\li	ISC_R_SUCCESS
 *\li	ISC_R_NOMEMORY
 *
 *\li	Any error that dns_name_totext() can return.
 */

isc_result_t
dns_name_fromstring(dns_name_t *target, const char *src, unsigned int options,
		    isc_mem_t *mctx);
isc_result_t
dns_name_fromstring2(dns_name_t *target, const char *src,
		     const dns_name_t *origin, unsigned int options,
		     isc_mem_t *mctx);
/*%<
 * Convert a string to a name and place it in target, allocating memory
 * as necessary.  'options' has the same semantics as that of
 * dns_name_fromtext().
 *
 * If 'target' has a buffer then the name will be copied into it rather than
 * memory being allocated.
 *
 * Requires:
 *
 * \li	'target' is a valid name that is not read-only.
 * \li	'src' is not NULL.
 *
 * Returns:
 *
 *\li	#ISC_R_SUCCESS
 *
 *\li	Any error that dns_name_fromtext() can return.
 *
 *\li	Any error that dns_name_dup() can return.
 */

isc_result_t
dns_name_settotextfilter(dns_name_totextfilter_t proc);
/*%<
 * Set / clear a thread specific function 'proc' to be called at the
 * end of dns_name_totext().
 *
 * Note: Under Windows you need to call "dns_name_settotextfilter(NULL);"
 * prior to exiting the thread otherwise memory will be leaked.
 * For other platforms, which are pthreads based, this is still a good
 * idea but not required.
 *
 * Returns
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_UNEXPECTED
 */

#define DNS_NAME_FORMATSIZE (DNS_NAME_MAXTEXT + 1)
/*%<
 * Suggested size of buffer passed to dns_name_format().
 * Includes space for the terminating NULL.
 */

isc_result_t
dns_name_copy(const dns_name_t *source, dns_name_t *dest, isc_buffer_t *target);
/*%<
 * Makes 'dest' refer to a copy of the name in 'source'.  The data are
 * either copied to 'target' or the dedicated buffer in 'dest'.
 *
 * Requires:
 * \li	'source' is a valid name.
 *
 * \li	'dest' is an initialized name with a dedicated buffer.
 *
 * \li	'target' is NULL or an initialized buffer.
 *
 * \li	Either dest has a dedicated buffer or target != NULL.
 *
 * Ensures:
 *
 *\li	On success, the used space in target is updated.
 *
 * Returns:
 *\li	#ISC_R_SUCCESS
 *\li	#ISC_R_NOSPACE
 */

bool
dns_name_ishostname(const dns_name_t *name, bool wildcard);
/*%<
 * Return if 'name' is a valid hostname.  RFC 952 / RFC 1123.
 * If 'wildcard' is true then allow the first label of name to
 * be a wildcard.
 * The root is also accepted.
 *
 * Requires:
 *	'name' to be valid.
 */


bool
dns_name_ismailbox(const dns_name_t *name);
/*%<
 * Return if 'name' is a valid mailbox.  RFC 821.
 *
 * Requires:
 * \li	'name' to be valid.
 */

bool
dns_name_internalwildcard(const dns_name_t *name);
/*%<
 * Return if 'name' contains a internal wildcard name.
 *
 * Requires:
 * \li	'name' to be valid.
 */

void
dns_name_destroy(void);
/*%<
 * Cleanup dns_name_settotextfilter() / dns_name_totext() state.
 *
 * This should be called as part of the final cleanup process.
 *
 * Note: dns_name_settotextfilter(NULL); should be called for all
 * threads which have called dns_name_settotextfilter() with a
 * non-NULL argument prior to calling dns_name_destroy();
 */

bool
dns_name_isdnssd(const dns_name_t *owner);
/*%<
 * Determine if the 'owner' is a DNS-SD prefix.
 */

bool
dns_name_isrfc1918(const dns_name_t *owner);
/*%<
 * Determine if the 'name' is in the RFC 1918 reverse namespace.
 */

bool
dns_name_isula(const dns_name_t *owner);
/*%<
 * Determine if the 'name' is in the ULA reverse namespace.
 */

bool
dns_name_istat(const dns_name_t *name);
/*
 * Determine if 'name' is a potential 'trust-anchor-telemetry' name.
 */

ISC_LANG_ENDDECLS

/*
 *** High Performance Macros
 ***/

/*
 * WARNING:  Use of these macros by applications may require recompilation
 *           of the application in some situations where calling the function
 *           would not.
 *
 * WARNING:  No assertion checking is done for these macros.
 */

#define DNS_NAME_INIT(n, o) \
do { \
	dns_name_t *_n = (n); \
	/* memset(_n, 0, sizeof(*_n)); */ \
	_n->magic = DNS_NAME_MAGIC; \
	_n->ndata = NULL; \
	_n->length = 0; \
	_n->labels = 0; \
	_n->attributes = 0; \
	_n->offsets = (o); \
	_n->buffer = NULL; \
	ISC_LINK_INIT(_n, link); \
	ISC_LIST_INIT(_n->list); \
	_n->ht = NULL; \
} while (0)

#define DNS_NAME_RESET(n) \
do { \
	(n)->ndata = NULL; \
	(n)->length = 0; \
	(n)->labels = 0; \
	(n)->attributes &= ~DNS_NAMEATTR_ABSOLUTE; \
	if ((n)->buffer != NULL) \
		isc_buffer_clear((n)->buffer); \
} while (0)

#define DNS_NAME_SETBUFFER(n, b) \
	(n)->buffer = (b)

#define DNS_NAME_ISABSOLUTE(n) \
	(((n)->attributes & DNS_NAMEATTR_ABSOLUTE) != 0 ? true : false)

#define DNS_NAME_COUNTLABELS(n) \
	((n)->labels)

#define DNS_NAME_TOREGION(n, r) \
do { \
	(r)->base = (n)->ndata; \
	(r)->length = (n)->length; \
} while (0)

#define DNS_NAME_SPLIT(n, l, p, s) \
do { \
	dns_name_t *_n = (n); \
	dns_name_t *_p = (p); \
	dns_name_t *_s = (s); \
	unsigned int _l = (l); \
	if (_p != NULL) \
		dns_name_getlabelsequence(_n, 0, _n->labels - _l, _p); \
	if (_s != NULL) \
		dns_name_getlabelsequence(_n, _n->labels - _l, _l, _s); \
} while (0)

#ifdef DNS_NAME_USEINLINE

#define dns_name_init(n, o)		DNS_NAME_INIT(n, o)
#define dns_name_reset(n)		DNS_NAME_RESET(n)
#define dns_name_setbuffer(n, b)	DNS_NAME_SETBUFFER(n, b)
#define dns_name_countlabels(n)		DNS_NAME_COUNTLABELS(n)
#define dns_name_isabsolute(n)		DNS_NAME_ISABSOLUTE(n)
#define dns_name_toregion(n, r)		DNS_NAME_TOREGION(n, r)
#define dns_name_split(n, l, p, s)	DNS_NAME_SPLIT(n, l, p, s)

#endif /* DNS_NAME_USEINLINE */

#endif /* DNS_NAME_H */

Youez - 2016 - github.com/yon3zu
LinuXploit