Invalid IPP response

[michaelrsweet]

Version: 1.1.23 CUPS.org User: elkner

If DefaultLanguage is not set in /etc/cups/cupsd.conf (i.e. commented out) CUPS sends an invalid IPP response, which causes e.g. Java (verified for all >= 1.4) to fail with java.lang.IndexOutOfBoundsException, since the decoder relies on the fact, that a value is always prefixed with 2 bytes (length of value).

E.g.: ... 0x08f0: 001b 6e61 7475 7261 6c2d 6c61 6e67 7561 ..natural-langua 0x0900: 6765 2d63 6f6e 6669 6775 7265 6400 a46c ge-configured..l 0x0910: 632d 6374 7970 653d 656e 2d75 733b 6c63 c-ctype=en-us;lc ... 0x09b0: 6e3d 6348 0024 6765 6e65 7261 7465 642d n=cH.$generated- 0x09c0: 6e61 7475 7261 6c2d 6c61 6e67 7561 6765 natural-language 0x09d0: 2d73 7570 706f 7274 6564 00a4 6c63 2d63 -supported..lc-c 0x09e0: 7479 7065 3d65 6e2d 7573 3b6c 632d 6e75 type=en-us;lc-nu ...

In case you need the complete conversation between CUPS and the Java client, please let me know.

[michaelrsweet]

CUPS.org User: mike

Yes, please attach both the request you are sending and the response you received.

Also, what Java software are you using to send the request?

[michaelrsweet]

CUPS.org User: mike

What Java software are you using to send the request?

The request and response both seem to use "utf-8" and "en" for the charset and language, respectively, and DefaultCharset and DefaultLanguage are not used for populating the IPP natural-language stuff unless the request does not provide them (which it apparently does...)

[michaelrsweet]

CUPS.org User: elkner

java version "1.5.0_06" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05) Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

Well, for tracking I use a selfwritten test, which does the same, as the Java application (since the sun.print.* sources are not available in the JDK itself). The error gets triggered in the Java application e.g. via javax.swing.JTable.print().

If you want the little test app, I use for tracking this problem, let me know (in this case I would need a non public email address, since it contains the original, proprietary code snipplet of sun.print.IPPPrintService.readIPPResponse).

But anyway, even if the languages are provided (which might be AFAIK not a bad thing), CUPS should not generate invalid responses (even if it doesn't understand, what's beeing sent).

[michaelrsweet]

CUPS.org User: mike

OK, I've decoded the hex data from the requests and responses - all four sets contain valid IPP messages, so you need to report this as a BUG to Sun. Here is the output from cups/testipp:

response2.out:

operation-attributes-tag:

attributes-charset (charset): "utf-8"
attributes-natural-language (naturalLanguage): "en"

printer-attributes-tag:

printer-uri-supported (uri): "ipp://elke:631/printers/ps"
uri-authentication-supported (keyword): "requesting-user-name"
uri-security-supported (keyword): "none"
printer-name (nameWithoutLanguage): "ps"
printer-location (textWithoutLanguage): "/tmp/username"
printer-info (textWithoutLanguage): "Virtual PS file printer"
printer-more-info (uri): "ipp://elke:631/printers/ps"
job-quota-period (integer): 0
job-k-limit (integer): 0
job-page-limit (integer): 0
job-sheets-default (1setOf nameWithoutLanguage): "none" "none"
device-uri (uri): "cups-ps:/"
color-supported (boolean): false
pages-per-minute (integer): 35
printer-make-and-model (textWithoutLanguage): "HP LaserJet 4200 PS v3010.108"
media-supported (1setOf keyword): "Upper" "ManualFeedTray" "Middle" "EnvFeed" "Tray3_500" "Tray3_1500" "Tray4_500" "Tray4_1500" "Plain" "Preprinted" "Letterhead" "Transparency" "Prepunched" "Labels" "Bond" "Recycled" "Color" "CardStock164" "Rough" "Envelope" "Auto" "Letter" "Executive" "Legal" "A4" "A5" "w499h709" "B5" "DoublePostcard" "w612h935" "w558h774" "Env10" "EnvMonarch" "EnvDL" "EnvC5" "EnvISOB5" "Custom"
media-default (keyword): "A4"
output-bin-supported (1setOf keyword): "Auto" "Upper" "Stacker"
sides-supported (1setOf keyword): "one" "two-long-edge" "two-short-edge"
sides-default (keyword): "one"
finishings-supported (1setOf enum): 3 4
finishings-default (enum): 3
printer-type (enum): 36980
pdl-override-supported (keyword): "not-attempted"
ipp-versions-supported (1setOf keyword): "1.0" "1.1"
operations-supported (1setOf enum): 2 4 5 6 8 9 10 11 12 13 16 17 18 20 34 35 16385 16386 16387 16388 16389 16390 16391 16392 16393 16395 16396 14
multiple-document-jobs-supported (boolean): true
multiple-operation-time-out (integer): 60
multiple-document-handling-supported (1setOf keyword): "separate-documents-uncollated-copies" "separate-documents-collated-copies"
charset-configured (charset): "utf-8"
charset-supported (1setOf charset): "us-ascii" "iso-8859-1" "iso-8859-2" "iso-8859-3" "iso-8859-4" "iso-8859-5" "iso-8859-6" "iso-8859-7" "iso-8859-8" "iso-8859-9" "iso-8859-10" "iso-8859-13" "iso-8859-14" "iso-8859-15" "utf-8" "windows-874" "windows-1250" "windows-1251" "windows-1252" "windows-1253" "windows-1254" "windows-1255" "windows-1256" "windows-1257" "windows-1258" "koi8-r" "koi8-u"
natural-language-configured (naturalLanguage): "lc-ctype=en-us;lc-numeric=c;lc-time=c;lc-collate=c;lc-monetary=c;lc-messages=c;lc-paper=c;lc-name=c;lc-address=c;lc-telephone=c;lc-measurement=c;lc-identification=c"
generated-natural-language-supported (naturalLanguage): "lc-ctype=en-us;lc-numeric=c;lc-time=c;lc-collate=c;lc-monetary=c;lc-messages=c;lc-paper=c;lc-name=c;lc-address=c;lc-telephone=c;lc-measurement=c;lc-identification=c"
document-format-default (mimeMediaType): "application/octet-stream"
document-format-supported (1setOf mimeMediaType): "application/msword" "application/pdf" "application/postscript" "application/vnd.cups-command" "application/vnd.cups-form" "application/vnd.cups-postscript" "application/vnd.cups-raster" "application/vnd.cups-raw" "application/vnd.hp-hpgl" "application/x-cshell" "application/x-perl" "application/x-shell" "image/gif" "image/jpeg" "image/png" "image/tiff" "image/x-alias" "image/x-bitmap" "image/x-photocd" "image/x-portable-anymap" "image/x-portable-bitmap" "image/x-portable-graymap" "image/x-portable-pixmap" "image/x-sgi-rgb" "image/x-sun-raster" "image/x-xbitmap" "image/x-xpixmap" "image/x-xwindowdump" "text/html" "text/plain" "application/octet-stream"
compression-supported (1setOf keyword): "none" "gzip"
job-priority-supported (integer): 100
job-priority-default (integer): 50
copies-supported (rangeOfInteger): 1-100
copies-default (integer): 1
page-ranges-supported (boolean): true
number-up-supported (1setOf integer): 1 2 4 6 9 16
number-up-default (integer): 1
orientation-requested-supported (1setOf enum): 3 4 5 6
orientation-requested-default (enum): 3
job-hold-until-supported (1setOf keyword): "no-hold" "indefinite" "day-time" "evening" "night" "second-shift" "third-shift" "weekend"
job-hold-until-default (keyword): "no-hold"
job-sheets-supported (1setOf nameWithoutLanguage): "none" "classified" "confidential" "secret" "standard" "topsecret" "unclassified"