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Diffstat (limited to 'doc/sphinx/uml/packet4.svg')
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diff --git a/doc/sphinx/uml/packet4.svg b/doc/sphinx/uml/packet4.svg new file mode 100644 index 0000000..2e37ed9 --- /dev/null +++ b/doc/sphinx/uml/packet4.svg @@ -0,0 +1,160 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="1814px" preserveAspectRatio="none" style="width:1862px;height:1814px;" version="1.1" viewBox="0 0 1862 1814" width="1862px" zoomAndPan="magnify"><defs><filter height="300%" id="f1u1c8b25aigi3" width="300%" x="-1" y="-1"><feGaussianBlur result="blurOut" stdDeviation="2.0"/><feColorMatrix in="blurOut" result="blurOut2" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 0"/><feOffset dx="4.0" dy="4.0" in="blurOut2" result="blurOut3"/><feBlend in="SourceGraphic" in2="blurOut3" mode="normal"/></filter></defs><g><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="332" x="756" y="17.4023">DHCPv4 packet processing (Kea 1.8.0)</text><!--MD5=[91c043391605f0bbc36c648123f05f04] +cluster process--><rect fill="#FFFFFF" filter="url(#f1u1c8b25aigi3)" height="103" style="stroke: #000000; stroke-width: 1.5;" width="849" x="715" y="924.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="257" x="1011" y="939.7344">Process Query on its Message Type</text><!--MD5=[a6437f938727ef6368484703a6d5a51f] +entity processDiscover--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="134" x="1088" y="967.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="114" x="1098" y="990.7344">Process Discover</text><!--MD5=[776f46e8e787ed3ff8f7399fa81d4ef1] +entity processRequest--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="131" x="758.5" y="967.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="111" x="768.5" y="990.7344">Process Request</text><!--MD5=[fc7d6e37f840cd9a10a681e81df6f28b] +entity processRelease--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="128" x="925" y="967.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="108" x="935" y="990.7344">Process Release</text><!--MD5=[8d825f552c438f1d41e38a94f08e3f47] +entity processDecline--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="126" x="1257" y="967.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="106" x="1267" y="990.7344">Process Decline</text><!--MD5=[3b341f45531d1fcf2cf88cb83e9fdef4] +entity processInform--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="122" x="1418" y="967.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="102" x="1428" y="990.7344">Process Inform</text><!--MD5=[aa62c1eea3f70b4dbb2d8a2ad04d8b75] +entity receivePacket--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="114" x="1560" y="28.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="94" x="1570" y="51.7344">Receive query</text><path d="M1471,33.6992 L1471,59.0098 A0,0 0 0 0 1471,59.0098 L1525,59.0098 A0,0 0 0 0 1525,59.0098 L1525,51.6992 L1559.77,46.1992 L1525,43.6992 L1525,43.6992 L1515,33.6992 L1471,33.6992 A0,0 0 0 0 1471,33.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1515,33.6992 L1515,43.6992 L1525,43.6992 L1515,33.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="33" x="1477" y="51.2676">input</text><!--MD5=[37dd4220ca2f2608029cfa1ef00c2d62] +entity isServiceEnabled--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="127" x="1553.5" y="125.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="107" x="1563.5" y="148.7344">Service Enabled</text><!--MD5=[f1e4a9c8bda8d25100748cfdff400bf1] +entity buffer4_receive--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="179" x="1000.5" y="238.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="159" x="1010.5" y="261.7344">Callout buffer4_receive</text><path d="M1214.5,243.6992 L1214.5,252.1992 L1179.66,256.1992 L1214.5,260.1992 L1214.5,269.0098 A0,0 0 0 0 1214.5,269.0098 L1267.5,269.0098 A0,0 0 0 0 1267.5,269.0098 L1267.5,253.6992 L1257.5,243.6992 L1214.5,243.6992 A0,0 0 0 0 1214.5,243.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1257.5,243.6992 L1257.5,253.6992 L1267.5,253.6992 L1257.5,243.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="1220.5" y="261.2676">hook</text><!--MD5=[ce6c3f645c8aec4915456c978c48f6f1] +entity unpack--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="114" x="640" y="351.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="94" x="650" y="374.7344">Unpack query</text><!--MD5=[f8582116def27e35cdbbbf5463e43073] +entity classify--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="115" x="639.5" y="448.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="95" x="649.5" y="471.7344">Classify query</text><!--MD5=[92aee3b8b080bbd52e01e7cb395370c4] +entity pkt4_receive--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="159" x="454.5" y="545.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="139" x="464.5" y="568.7344">Callout pkt4_receive</text><path d="M648.5,550.6992 L648.5,559.1992 L613.59,563.1992 L648.5,567.1992 L648.5,576.0098 A0,0 0 0 0 648.5,576.0098 L701.5,576.0098 A0,0 0 0 0 701.5,576.0098 L701.5,560.6992 L691.5,550.6992 L648.5,550.6992 A0,0 0 0 0 648.5,550.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M691.5,550.6992 L691.5,560.6992 L701.5,560.6992 L691.5,550.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="654.5" y="568.2676">hook</text><!--MD5=[7aeeef4718a003ce2e7ad9bcbdf71ad9] +entity drop_class--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="141" x="243.5" y="658.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="121" x="253.5" y="681.7344">Check DROP class</text><!--MD5=[a52533196b9ad0f42d77bd2c5acf5304] +entity same_client--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="333" x="147.5" y="755.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="313" x="157.5" y="778.7344">Avoid same client race in multi-threaded mode</text><path d="M587.5,760.6992 L587.5,769.1992 L480.63,773.1992 L587.5,777.1992 L587.5,786.0098 A0,0 0 0 0 587.5,786.0098 L790.5,786.0098 A0,0 0 0 0 790.5,786.0098 L790.5,770.6992 L780.5,760.6992 L587.5,760.6992 A0,0 0 0 0 587.5,760.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M780.5,760.6992 L780.5,770.6992 L790.5,770.6992 L780.5,760.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="182" x="593.5" y="778.2676">postpone processing or drop</text><!--MD5=[a8af8e48f2cc558a0fee70431885f908] +entity leases4_committed--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="197" x="1045.5" y="1098.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="177" x="1055.5" y="1121.7344">Callout leases4_committed</text><path d="M1277.5,1103.6992 L1277.5,1112.1992 L1242.75,1116.1992 L1277.5,1120.1992 L1277.5,1129.0098 A0,0 0 0 0 1277.5,1129.0098 L1330.5,1129.0098 A0,0 0 0 0 1330.5,1129.0098 L1330.5,1113.6992 L1320.5,1103.6992 L1277.5,1103.6992 A0,0 0 0 0 1277.5,1103.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1320.5,1103.6992 L1320.5,1113.6992 L1330.5,1113.6992 L1320.5,1103.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="1283.5" y="1121.2676">hook</text><!--MD5=[8e18f13991ca58e5a79e0b81ed56b9db] +entity park--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="50" x="1119" y="1211.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="30" x="1129" y="1234.7344">Park</text><!--MD5=[145fde1089ff11319f35031b66a8b2bf] +entity pkt4_send--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="144" x="943" y="1324.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="124" x="953" y="1347.7344">Callout pkt4_send</text><!--MD5=[62d5b04920c444814fafa1dbf06b35cd] +entity send--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="121" x="1052.5" y="1647.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="101" x="1062.5" y="1670.7344">Send response</text><!--MD5=[5f600c2348a98514851ba709bbd3f597] +entity pack--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="118" x="1077" y="1437.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="98" x="1087" y="1460.7344">Pack response</text><!--MD5=[d6829aa81ee0cd45a2e878b8b13197d5] +entity buffer4_send--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="164" x="1037" y="1534.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="144" x="1047" y="1557.7344">Callout buffer4_send</text><path d="M954.5,1652.6992 L954.5,1678.0098 A0,0 0 0 0 954.5,1678.0098 L1017.5,1678.0098 A0,0 0 0 0 1017.5,1678.0098 L1017.5,1670.6992 L1052.35,1665.1992 L1017.5,1662.6992 L1017.5,1662.6992 L1007.5,1652.6992 L954.5,1652.6992 A0,0 0 0 0 954.5,1652.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1007.5,1652.6992 L1007.5,1662.6992 L1017.5,1662.6992 L1007.5,1652.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="42" x="960.5" y="1670.2676">output</text><!--MD5=[c92710f32fe9c293a125fb7e80204a05] +entity drop--><rect fill="#FEFECE" filter="url(#f1u1c8b25aigi3)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="103" x="912.5" y="1744.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="83" x="922.5" y="1767.7344">Drop packet</text><path d="M826.5,1749.6992 L826.5,1775.0098 A0,0 0 0 0 826.5,1775.0098 L877.5,1775.0098 A0,0 0 0 0 877.5,1775.0098 L877.5,1767.6992 L912.49,1762.1992 L877.5,1759.6992 L877.5,1759.6992 L867.5,1749.6992 L826.5,1749.6992 A0,0 0 0 0 826.5,1749.6992 " fill="#FBFB77" filter="url(#f1u1c8b25aigi3)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M867.5,1749.6992 L867.5,1759.6992 L877.5,1759.6992 L867.5,1749.6992 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="30" x="832.5" y="1767.2676">error</text><!--MD5=[9670815d90e482d849702fdd57183fae] +link receivePacket to isServiceEnabled--><path d="M1617,64.6192 C1617,80.1592 1617,102.9792 1617,119.8592 " fill="none" id="receivePacket->isServiceEnabled" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1617,124.8892,1621,115.8892,1617,119.8892,1613,115.8892,1617,124.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[8b6c78e5054b687dbc9e19308d3a0129] +link isServiceEnabled to buffer4_receive--><path d="M1553.43,157.5892 C1459.11,177.4592 1281.88,214.7792 1176.04,237.0792 " fill="none" id="isServiceEnabled->buffer4_receive" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1171.05,238.1292,1180.681,240.1893,1175.9427,237.0992,1179.0329,232.3609,1171.05,238.1292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="112" x="1386" y="204.7676">service is enabled</text><!--MD5=[228411fb88ef1bcdfe7f19b853e215d2] +link isServiceEnabled to drop--><path d="M1655.3,161.3592 C1689.09,179.3992 1733,211.2992 1733,255.1992 C1733,255.1992 1733,255.1992 1733,1666.1992 C1733,1737.9692 1198.66,1756.0992 1020.81,1760.1492 " fill="none" id="isServiceEnabled->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1015.65,1760.2592,1024.7391,1764.0525,1020.6487,1760.145,1024.5562,1756.0546,1015.65,1760.2592" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="116" x="1734" y="896.7676">service is disabled</text><!--MD5=[939988dada0403ed6d1a4e6924dd7701] +link buffer4_receive to unpack--><path d="M1029.46,274.2992 C956.18,294.9992 833.42,329.6692 759.35,350.5892 " fill="none" id="buffer4_receive->unpack" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="754.1,352.0692,763.8515,353.4505,758.9087,350.6994,761.6598,345.7566,754.1,352.0692" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="67" x="918" y="317.7676">CONTINUE</text><!--MD5=[02f70f5bfef59fd4c02228f0fd276994] +link buffer4_receive to classify--><path d="M1066.12,274.4492 C1047.04,287.8992 1019.38,306.6792 994,321.1992 C907.16,370.8892 800.63,419.7792 741.66,445.8492 " fill="none" id="buffer4_receive->classify" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="736.8,447.9892,746.6488,448.032,741.3778,445.9784,743.4314,440.7075,736.8,447.9892" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="26" x="940" y="374.2676">SKIP</text><!--MD5=[41e6595d93b5d76e06ef1219c230b624] +link buffer4_receive to drop--><path d="M1179.77,272.9392 C1336.38,300.6992 1643,356.5292 1643,368.1992 C1643,368.1992 1643,368.1992 1643,1666.1992 C1643,1728.8292 1184.07,1752.6892 1020.81,1759.1992 " fill="none" id="buffer4_receive->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1015.59,1759.3992,1024.7431,1763.0353,1020.586,1759.1988,1024.4224,1755.0417,1015.59,1759.3992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="35" x="1644" y="990.2676">DROP</text><!--MD5=[1ecae68ae42d9a73e40e9217f03f9ce7] +link unpack to classify--><path d="M697,387.6192 C697,403.1592 697,425.9792 697,442.8592 " fill="none" id="unpack->classify" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="697,447.8892,701,438.8892,697,442.8892,693,438.8892,697,447.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[27fcba0ca5551c2a3eff6088113b3400] +link unpack to drop--><path d="M639.86,372.0692 C474.31,378.2592 6,401.3992 6,465.1992 C6,465.1992 6,465.1992 6,1666.1992 C6,1765.3592 797.05,1728.7492 895,1744.1992 C898.94,1744.8192 902.99,1745.5592 907.05,1746.3692 " fill="none" id="unpack->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="912.2,1747.4292,904.201,1741.6833,907.3044,1746.4129,902.5748,1749.5163,912.2,1747.4292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="50" x="7" y="1064.7676">on error</text><!--MD5=[6d44324a94e4b11142830ec71aa81556] +link classify to pkt4_receive--><path d="M667.48,484.3992 C639.44,500.7492 597.31,525.2992 567.9,542.4392 " fill="none" id="classify->pkt4_receive" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="563.3,545.1192,573.0915,544.0576,567.6235,542.6079,569.0733,537.1399,563.3,545.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[0057d53684278b0199141f1c920049f3] +link pkt4_receive to drop_class--><path d="M499.2,581.2692 C481.2,590.1392 458.89,601.1892 439,611.1992 C409.58,626.0092 376.4,643.0092 351.62,655.7692 " fill="none" id="pkt4_receive->drop_class" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="347.1,658.0992,356.9329,657.5388,351.5461,655.8118,353.2731,650.425,347.1,658.0992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="67" x="440" y="624.7676">CONTINUE</text><!--MD5=[23d76d484a8ade2f68bc32d339275e55] +link pkt4_receive to drop--><path d="M534,581.4992 C534,603.3392 534,642.0492 534,675.1992 C534,675.1992 534,675.1992 534,1666.1992 C534,1687.5792 558.43,1677.3692 579,1683.1992 C716.63,1722.1692 755.29,1713.5292 895,1744.1992 C899.07,1745.0892 903.27,1746.0492 907.49,1747.0292 " fill="none" id="pkt4_receive->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="912.45,1748.1992,904.6015,1742.2493,907.5822,1747.0572,902.7743,1750.0379,912.45,1748.1992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="35" x="535" y="1177.7676">DROP</text><!--MD5=[2ba86aae9fb469d61f9b8011ebc0bd96] +link drop_class to same_client--><path d="M314,694.6192 C314,710.1592 314,732.9792 314,749.8592 " fill="none" id="drop_class->same_client" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="314,754.8892,318,745.8892,314,749.8892,310,745.8892,314,754.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[4eef49efa4e6a39b9cad1f9dd4db75c9] +link drop_class to drop--><path d="M243.48,679.2592 C179.13,685.3592 94,705.9492 94,772.1992 C94,772.1992 94,772.1992 94,1666.1992 C94,1720.9492 161.68,1676.3392 216,1683.1992 C337.59,1698.5492 367.98,1702.7792 490,1714.1992 C669.71,1731.0192 716.75,1715.8392 895,1744.1992 C898.94,1744.8292 902.99,1745.5692 907.05,1746.3792 " fill="none" id="drop_class->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="912.2,1747.4492,904.1976,1741.708,907.3038,1746.4357,902.576,1749.5419,912.2,1747.4492" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="126" x="95" y="1234.2676">query in DROP class</text><!--MD5=[bb9b361438ecdeec2ed5ec34799fad2e] +link same_client to process--><path d="M347.12,791.2092 C395.425,816.0092 488.31,863.6992 569.655,905.4642 C610.3275,926.3467 648.115,945.748 676.0025,960.0661 C689.9463,967.2252 701.415,973.1134 709.5319,977.2807 C711.5611,978.3225 713.3808,979.2568 714.9774,980.0764 " fill="none" id="same_client->process" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="714.9774,980.0764,708.7978,972.4075,710.5293,977.7928,705.144,979.5244,714.9774,980.0764" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[2de62570b816e5df0f82700c4b296cc3] +link same_client to drop--><path d="M299.7,791.2592 C288.57,806.3092 275,829.3392 275,852.1992 C275,852.1992 275,852.1992 275,1173.6992 C275,1222.3992 247.11,1229.1792 239,1277.1992 C237.74,1284.6492 238.76,1286.6492 239,1294.1992 C239.67,1315.1192 242,1320.2692 242,1341.1992 C242,1341.1992 242,1341.1992 242,1666.1992 C242,1713.3692 777.64,1725.3292 895,1744.1992 C898.94,1744.8292 902.99,1745.5792 907.05,1746.3992 " fill="none" id="same_client->drop" style="stroke: #A80036; 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stroke-width: 1.0;"/><polygon fill="#A80036" points="1122.1,1533.8892,1127.61,1525.7259,1122.973,1528.966,1119.7329,1524.3291,1122.1,1533.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[0fe92c55fb860475c26b6ea914a50894] +link buffer4_send to send--><path d="M1118.06,1570.5392 C1117.02,1589.7692 1115.34,1620.8292 1114.21,1641.8592 " fill="none" id="buffer4_send->send" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1113.93,1646.9792,1118.412,1638.2093,1114.201,1641.9866,1110.4237,1637.7756,1113.93,1646.9792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="67" x="1117" y="1613.7676">CONTINUE</text><!--MD5=[887aa11356841167329c21249679272f] +link buffer4_send to drop--><path d="M1161.34,1570.3192 C1173.8,1577.5792 1185.96,1587.3992 1193,1600.1992 C1201.95,1616.4792 1222.86,1639.9692 1191,1683.1992 C1151.85,1736.3392 1074.24,1753.5792 1020.76,1758.9992 " fill="none" id="buffer4_send->drop" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="1015.66,1759.4892,1025.0054,1762.5977,1020.6364,1759.0044,1024.2297,1754.6354,1015.66,1759.4892" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="35" x="1208" y="1670.2676">DROP</text><!--MD5=[6b25e4fe160ab604f67b02c1ded86970] +link send to drop--><text fill="#888888" font-family="sans-serif" font-size="10" lengthAdjust="spacingAndGlyphs" textLength="225" x="809.5" y="1801.3555">dashed arrow means asynchronous processing</text><!--MD5=[3241bf81dfc1d82f66e0faca3c9d8456] +@startuml + +title DHCPv4 packet processing (Kea 1.8.0) + +agent "Receive query" as receivePacket +note left : input + +agent "Service Enabled" as isServiceEnabled + +agent "Callout buffer4_receive" as buffer4_receive +note right : hook + +agent "Unpack query" as unpack + +agent "Classify query" as classify + +agent "Callout pkt4_receive" as pkt4_receive +note right : hook + +agent "Check DROP class" as drop_class + +agent "Avoid same client race in multi-threaded mode" as same_client +note right : postpone processing or drop + +rectangle "Process Query on its Message Type" as process { + agent "Process Discover" as processDiscover + agent "Process Request" as processRequest + agent "Process Release" as processRelease + agent "Process Decline" as processDecline + agent "Process Inform" as processInform +} + +agent "Callout leases4_committed" as leases4_committed +note right : hook + +agent "Park" as park + +agent "Callout pkt4_send" as pkt4_send + +agent "Send response" as send + +agent "Pack response" as pack + +agent "Callout buffer4_send" as buffer4_send + +agent "Send response" as send +note left : output + +agent "Drop packet" as drop +note left : error + +receivePacket - -> isServiceEnabled +isServiceEnabled - -> buffer4_receive : service is enabled +isServiceEnabled - - - -> drop : service is disabled +buffer4_receive - -> unpack : CONTINUE +buffer4_receive - -> classify : SKIP +buffer4_receive - - - -> drop : DROP +unpack - -> classify +unpack - - -> drop : on error +classify - -> pkt4_receive +pkt4_receive - -> drop_class : CONTINUE +pkt4_receive - - -> drop : DROP +drop_class - -> same_client +drop_class - - -> drop : query in DROP class +same_client - - -> process +same_client - - -> drop : queries from the same client possible race +process - - -> drop : unknown message type +processDiscover - -> leases4_committed +processDiscover - - -> drop : on error +processRequest - -> leases4_committed +processRequest - - -> drop : on error +processRelease - -> leases4_committed +processRelease - - -> drop : on error +processDecline - -> leases4_committed +processDecline - - -> drop : on error +processInform - -> leases4_committed +processInform - - -> drop : on error +leases4_committed - -> pkt4_send : CONTINUE +leases4_committed - - -> drop : DROP +leases4_committed - -> park : PARK +park -[dashed]-> pkt4_send : unpark +pkt4_send - -> pack : CONTINUE +pkt4_send - -> buffer4_send : SKIP +pkt4_send - - -> drop : DROP +pack - -> buffer4_send +buffer4_send - -> send : CONTINUE +buffer4_send - - -> drop : DROP +send -[hidden]-> drop + +footer dashed arrow means asynchronous processing + +@enduml + +PlantUML version 1.2020.15(Sun Jun 28 13:39:45 CEST 2020) +(GPL source distribution) +Java Runtime: OpenJDK Runtime Environment +JVM: OpenJDK 64-Bit Server VM +Default Encoding: UTF-8 +Language: en +Country: US +--></g></svg> |
