domain [!@hostC@hostB:hostA]
?†‘
RFC1413 identd information
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3.4 Compile-Time Macro Reference | 117
IP source-routing information is presented inside square brackets. If routing is strict, the
information is prefixed with an exclamation mark. The format of the information is made
to resemble that of source-route addressing (see also the DontPruneRoutes option, ?§24.9.43
on page 1024). In this example, the IP packets will go first to hostC, then to hostB, and
finally to hostA.
The inclusion of code to support this reporting is determined by the IP_SRCROUTE definition
in your Build m4 file:
APPENDDEF(`confENVDEF??, `-DIP_SRCROUTE=1??) ?†? turn on support
APPENDDEF(`confENVDEF??, `-DIP_SRCROUTE=0??) ?†? turn off support
It is predefined correctly for all supported systems in sendmail/conf.h. If you wishto disable
this, you can. But in general, you should need to redefine it only if you are porting sendmail
to a completely new system. Be sure to read sendmail/README for the latest
information about IP_SRCROUTE.
If you are running a precompiled sendmail binary, you can use the -d0.10 debugging
command-line switch (?§15.7.3 on page 543) to determine whether IP_SRCROUTE support
is defined (if it appears in the list, it is defined).
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