1<?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="804px" preserveAspectRatio="none" style="width:2089px;height:804px;" version="1.1" viewBox="0 0 2089 804" width="2089px" zoomAndPan="magnify"><defs><filter height="300%" id="f1tyzihefeaa12" 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="401" x="843.25" y="26.708">Proactive Authentication in Peripheral Role</text><ellipse cx="1030.1563" cy="40.9531" fill="#000000" filter="url(#f1tyzihefeaa12)" rx="10" ry="10" style="stroke:none;stroke-width:1.0;"/><rect fill="#FEFECE" filter="url(#f1tyzihefeaa12)" height="33.9688" rx="12.5" ry="12.5" style="stroke:#A80036;stroke-width:1.5;" width="119" x="970.6563" y="70.9531"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="95" x="984.6563" y="92.0918">A connects to B</text><path d="M1141.1563,114.9219 L1141.1563,138.6211 L1121.1563,142.6211 L1141.1563,146.6211 L1141.1563,170.3203 A0,0 0 0 0 1141.1563,170.3203 L1366.1563,170.3203 A0,0 0 0 0 1366.1563,170.3203 L1366.1563,124.9219 L1356.1563,114.9219 L1141.1563,114.9219 A0,0 0 0 0 1141.1563,114.9219 " fill="#FBFB77" filter="url(#f1tyzihefeaa12)" style="stroke:#A80036;stroke-width:1.0;"/><path d="M1356.1563,114.9219 L1356.1563,124.9219 L1366.1563,124.9219 L1356.1563,114.9219 " fill="#FBFB77" style="stroke:#A80036;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" 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lengthAdjust="spacingAndGlyphs" textLength="230" x="917.1563" y="211.459">App triggers GATT Client request on A</text><polygon fill="#FEFECE" filter="url(#f1tyzihefeaa12)" points="989.1563,244.2891,1071.1563,244.2891,1083.1563,256.2891,1071.1563,268.2891,989.1563,268.2891,977.1563,256.2891,989.1563,244.2891" style="stroke:#A80036;stroke-width:1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="82" x="989.1563" y="260.0972">LTK available?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="963.1563" y="253.6948">no</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="21" x="1083.1563" y="253.6948">yes</text><rect fill="#FEFECE" filter="url(#f1tyzihefeaa12)" height="33.9688" rx="12.5" ry="12.5" style="stroke:#A80036;stroke-width:1.5;" width="173" x="295.8125" y="278.2891"/><text fill="#000000" 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lengthAdjust="spacingAndGlyphs" textLength="267" x="952" y="662.3027">App receives GATT_QUERY_COMPLETE event</text><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="192" x="968" y="676.2715">with ATT_ERROR_INSUFFICIENT_X</text><ellipse cx="1083.5" cy="734.0703" fill="#FFFFFF" filter="url(#f1tyzihefeaa12)" rx="11" ry="11" style="stroke:#000000;stroke-width:1.0;"/><ellipse cx="1083.5" cy="734.0703" fill="#000000" rx="6" ry="6" style="stroke:#7F7F7F;stroke-width:1.0;"/><rect fill="#FEFECE" filter="url(#f1tyzihefeaa12)" height="33.9688" rx="12.5" ry="12.5" style="stroke:#A80036;stroke-width:1.5;" width="235" x="1560.5" y="278.2891"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="211" x="1574.5" y="299.4277">SM_EVENT_REENCRYPTION_STARTED</text><rect fill="#FEFECE" filter="url(#f1tyzihefeaa12)" height="33.9688" rx="12.5" ry="12.5" style="stroke:#A80036;stroke-width:1.5;" 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2@startuml
3title Proactive Authentication in Peripheral Role
4start
5: A connects to B;
6: SM checks if LTK available;
7note right
8  SM actions triggered by
9  connection complete
10  (independent from GATT Client)
11end note
12: App triggers GATT Client request on A;
13if (LTK available?) then (no)
14  : GATT Client request sent;
15  if (GATT Server returns an ATT_ERROR_INSUFFICIENT_X error?) then (no)
16    #23DB2B : App receives GATT Response;
17    stop
18  else (yes)
19    if (ENABLE_GATT_CLIENT_PAIRING defined?) then (no)
20      #FD5B41: App receives GATT_QUERY_COMPLETE event
21          with ATT_ERROR_INSUFFICIENT_X;
22      stop
23    else (yes)
24      : SM_EVENT_PAIRING_STARTED;
25      : start pairing;
26      if (pairing success?) then (yes)
27          : SM_EVENT_PAIRING_COMPLETE(ERROR_CODE_SUCCESS);
28          : GATT Client request re-sent;
29          #23DB2B : App receives GATT Response;
30          stop
31      else (no)
32          : SM_EVENT_PAIRING_COMPLETE(error);
33         #FD5B41: App receives GATT_QUERY_COMPLETE event
34              with ATT_ERROR_INSUFFICIENT_X;
35          stop
36      endif
37    endif
38  endif
39else (yes)
40   : SM_EVENT_REENCRYPTION_STARTED;
41   : start encryption;
42   if (re-encrypted) then (yes)
43     : SM_EVENT_REENCRYPTION_COMPLETE(ERROR_CODE_SUCCESS);
44     : GATT Client request sent;
45     #23DB2B : App receives GATT Response;
46     stop
47   else (no)
48     : SM_EVENT_REENCRYPTION_COMPLETE(error);
49     #FD5B41: App receives GATT_QUERY_COMPLETE event
50          with ATT_ERROR_BONDING_INFORMATION_MISSING;
51     stop
52     note right
53       App can delete bonding
54       information and repeat
55       the GATT Client request
56    end note
57  endif
58endif
59@enduml
60
61PlantUML version 1.2020.22(Sun Dec 06 09:36:27 UTC 2020)
62(GPL source distribution)
63Java Runtime: Java(TM) SE Runtime Environment
64JVM: Java HotSpot(TM) 64-Bit Server VM
65Default Encoding: UTF-8
66Language: en
67Country: US
68--></g></svg>