Getting Started - (DDS) Community RTI Connext Users

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Chapter 5As another example, let’s look at how to display only RTPS packets that containHEARTBEAT submessages.To display HEARTBEAT packets only:1. Clear anything you have in the filter text box with the Clear button, then clickthe Expression... button.2. In the new Filter Expression window, scroll down in the Field name list untilyou see RTPS. Expand the RTPS tree (click the + sign) to see the choices for thisprotocol, as seen in Figure 5.3.Figure 5.3Creating a Display FilterScroll down to RTPS or RTPS2.Click the + sign to expandthe tree.Use these fields to createa display filter.3. In the Field name list, select rtps.sm.id.4. In the Relation list, select ==.5. In the Predefined values: list, select HEARTBEAT.6. Click OK to close the Filter Expression window.7. Click Apply in the main window to apply the new filter. Now you will see onlyRTPS messages that contain a HEARTBEAT submessage, as shown in Figure 5.4.5-6
5.2 Displaying PacketsWireshark also allows you to save filter expressions for future use. For more information,see the Wireshark User’s Guide or online help.Figure 5.4Filtering by Submessage Type1. Use the Expression... button to help youenter a filter.2. Click Apply.3. Now onlypacketscontaining aHEARTBEATaredisplayed.Displaying RTPS and RTPS2 Messages:Table 5.2 briefly describes the meaning of each field that can be used in a display filterfor RTPS. To display packets for RTPS2, change the prefix from “rtps” to “rtps2.” (Thesefields can also be used in coloring rules, see Section 5.2.2.) To display both RTPS andRTPS2, rules must include both versions logically OR’ed together. For details on themeaning of these fields, see the Real-Time Publish-Subscribe Wire Protocol Specification (seeAvailable Documentation (Section 1.1)).Table 5.2Display-Filter Fields for RTPS MessagesFieldHeader fields:rtps.versionrtps.version.minorrtps.version.majorrtps.domain_idrtps.participant_idxrtps.traffic_naturertps.vendorIdDescriptionProtocol version (major.minor)Protocol minor versionProtocol major versionDomain ID of this communication (see note below)Participant index (see note below)Nature of the traffic (see note below)Vendor ID5. Analyzing Packets5-7
Page 3 and 4: Contents1 Introduction ............
Page 5 and 6: 1. IntroductionChapter 1Introductio
Page 7 and 8: 1.1 Available Documentation1.1 Avai
Page 9 and 10: Chapter 2InstallationTo install Wir
Page 11 and 12: Chapter 3Starting WiresharkImportan
Page 13 and 14: Chapter 4Capturing RTPS PacketsThis
Page 15 and 16: Table 4.1Example Capture FiltersTo
Page 17 and 18: Chapter 5Analyzing RTPS PacketsThis
Page 19 and 20: 5.2 Displaying PacketsTable 5.1RTPS
Page 21: 5.2 Displaying PacketsTo display RT
Page 25 and 26: 5.2 Displaying PacketsTable 5.2Disp
Page 27 and 28: 5.3 Analyzing Packets from RTI Data
Page 37 and 38: 6. Practical UsesChapter 6Practical
Page 39 and 40: 6.2 Visualizing Your SystemNOTE: RT
Page 41 and 42: 6.3 Providing Information to RTI Su

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