From mboxrd@z Thu Jan 1 00:00:00 1970 From: msweet@apple.com (Michael Sweet) Date: Tue, 25 Feb 2014 20:56:23 -0500 Subject: [Printing-architecture] Google Summer of Code 2014 - IPP-over-USB printer support - Joint project idea for OpenPrinting and the kernel In-Reply-To: <20140226014714.GA8346@kroah.com> References: <530CCC53.8070007@gmail.com> <3F2A4315-4F2C-4BB1-BC9C-67B6F6BCD3A3@apple.com> <20140226014714.GA8346@kroah.com> Message-ID: <8E2929D6-4A60-4D27-9012-5250503D9B51@apple.com> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Greg, On Feb 25, 2014, at 8:47 PM, Greg KH wrote: > ... > So you want to do this as a userspace library talking directly to the > USB device through usbfs/libusb? Or should the kernel provide a basic > "pipe-like" functionality to the hardware to make it easier for things > to be queued up to the device? libusb is enough. > Is there a pointer to the spec somewhere so that I can see what is > needed here? http://www.usb.org/developers/devclass_docs >>> Second, >>> I want to suggest this as a Google Summer of Code project, asking for >>> mentors on the kernel side. Mentoring Organization will be the Linux >>> Foundation, hosting projects for both OpenPrinting and the kernel. >> >> This will make an excellent SoC project, but you'll need someone >> familiar with Avahi, libusb, HTTP, systemd, and general networking for >> this. This isn't a kernel project. > > That's a non-trivial set of experience to try to find, good luck :) Agreed. > And why systemd? What is needed from it for this? Just for the launch-on-demand functionality. Not absolutely required, but it helps to minimize the overall "weight" of the OS when you aren't printing constantly... _________________________________________________________ Michael Sweet, Senior Printing System Engineer, PWG Chair -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 4881 bytes Desc: not available Url : http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140225/46bbd396/attachment.bin From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: MIME-version: 1.0 Content-type: multipart/signed; boundary="Apple-Mail=_4C884E6A-37BC-42E7-A826-839B3B54822A"; protocol="application/pkcs7-signature"; micalg=sha1 From: Michael Sweet In-reply-to: <20140226014714.GA8346@kroah.com> Date: Tue, 25 Feb 2014 20:56:23 -0500 Message-id: <8E2929D6-4A60-4D27-9012-5250503D9B51@apple.com> References: <530CCC53.8070007@gmail.com> <3F2A4315-4F2C-4BB1-BC9C-67B6F6BCD3A3@apple.com> <20140226014714.GA8346@kroah.com> Subject: Re: [Printing-architecture] Google Summer of Code 2014 - IPP-over-USB printer support - Joint project idea for OpenPrinting and the kernel List-Id: Printing architecture under linux List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Greg KH Cc: "printing-architecture@lists.linux-foundation.org" , Ubuntu Kernel Team , kernelnewbies@kernelnewbies.org, Linus Torvalds , Till Kamppeter --Apple-Mail=_4C884E6A-37BC-42E7-A826-839B3B54822A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Greg, On Feb 25, 2014, at 8:47 PM, Greg KH wrote: > ... > So you want to do this as a userspace library talking directly to the > USB device through usbfs/libusb? Or should the kernel provide a basic > "pipe-like" functionality to the hardware to make it easier for things > to be queued up to the device? libusb is enough. > Is there a pointer to the spec somewhere so that I can see what is > needed here? http://www.usb.org/developers/devclass_docs >>> Second, >>> I want to suggest this as a Google Summer of Code project, asking = for >>> mentors on the kernel side. Mentoring Organization will be the Linux >>> Foundation, hosting projects for both OpenPrinting and the kernel. >>=20 >> This will make an excellent SoC project, but you'll need someone >> familiar with Avahi, libusb, HTTP, systemd, and general networking = for >> this. This isn't a kernel project. >=20 > That's a non-trivial set of experience to try to find, good luck :) Agreed. > And why systemd? What is needed from it for this? Just for the launch-on-demand functionality. Not absolutely required, = but it helps to minimize the overall "weight" of the OS when you aren't = printing constantly... _________________________________________________________ Michael Sweet, Senior Printing System Engineer, PWG Chair --Apple-Mail=_4C884E6A-37BC-42E7-A826-839B3B54822A Content-Disposition: attachment; filename=smime.p7s Content-Type: application/pkcs7-signature; name=smime.p7s Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIPJTCCBN0w ggPFoAMCAQICEHGS++YZX6xNEoV0cTSiGKcwDQYJKoZIhvcNAQEFBQAwezELMAkGA1UEBhMCR0Ix GzAZBgNVBAgMEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBwwHU2FsZm9yZDEaMBgGA1UECgwR Q29tb2RvIENBIExpbWl0ZWQxITAfBgNVBAMMGEFBQSBDZXJ0aWZpY2F0ZSBTZXJ2aWNlczAeFw0w NDAxMDEwMDAwMDBaFw0yODEyMzEyMzU5NTlaMIGuMQswCQYDVQQGEwJVUzELMAkGA1UECBMCVVQx FzAVBgNVBAcTDlNhbHQgTGFrZSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdvcmsx ITAfBgNVBAsTGGh0dHA6Ly93d3cudXNlcnRydXN0LmNvbTE2MDQGA1UEAxMtVVROLVVTRVJGaXJz dC1DbGllbnQgQXV0aGVudGljYXRpb24gYW5kIEVtYWlsMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A MIIBCgKCAQEAsjmFpPJ9q0E7YkY3rs3BYHW8OWX5ShpHornMSMxqmNVNNRm5pELlzkniii8efNIx B8dOtINknS4p1aJkxIW9hVE1eaROaJB7HHqkkqgX8pgV8pPMyaQylbsMTzC9mKALi+VuG6JG+ni8 om+rWV6lL8/K2m2qL+usobNqqrcuZzWLeeEeaYji5kbNoKXqvgvOdjp6Dpvq/NonWz1zHyLmSGHG TPNpsaguG7bUMSAsvIKKjqQOpdeJQ/wWWq8dcdcRWdq6hw2v+vPhwvCkxWeM1tZUOt4KpLoDd7Nl yP0e03RiqhjKaJMeoYV+9Udly/hNVyh00jT/MLbu9mIwFIws6wIDAQABo4IBJzCCASMwHwYDVR0j BBgwFoAUoBEKIz6W8Qfs4q8p74Klf9AwpLQwHQYDVR0OBBYEFImCZ33EnSZwAEu0UEh83j2uBG59 MA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdJQQWMBQGCCsGAQUFBwMCBggr BgEFBQcDBDARBgNVHSAECjAIMAYGBFUdIAAwewYDVR0fBHQwcjA4oDagNIYyaHR0cDovL2NybC5j b21vZG9jYS5jb20vQUFBQ2VydGlmaWNhdGVTZXJ2aWNlcy5jcmwwNqA0oDKGMGh0dHA6Ly9jcmwu Y29tb2RvLm5ldC9BQUFDZXJ0aWZpY2F0ZVNlcnZpY2VzLmNybDARBglghkgBhvhCAQEEBAMCAQYw DQYJKoZIhvcNAQEFBQADggEBAJ2Vyzy4fqUJxB6/C8LHdo45PJTGEKpPDMngq4RdiVTgZTvzbRx8 NywlVF+WIfw3hJGdFdwUT4HPVB1rbEVgxy35l1FM+WbKPKCCjKbI8OLp1Er57D9Wyd12jMOCAU9s APMeGmF0BEcDqcZAV5G8ZSLFJ2dPV9tkWtmNH7qGL/QGrpxp7en0zykX2OBKnxogL5dMUbtGB8SK N04g4wkxaMeexIud6H4RvDJoEJYRmETYKlFgTYjrdDrfQwYyyDlWjDoRUtNBpEMD9O3vMyfbOeAU TibJ2PU54om4k123KSZB6rObroP8d3XK6Mq1/uJlSmM+RMTQw16Hc6mYHK9/FX8wggUaMIIEAqAD AgECAhBtGeqnGU9qMyLmIjJ6qnHeMA0GCSqGSIb3DQEBBQUAMIGuMQswCQYDVQQGEwJVUzELMAkG A1UECBMCVVQxFzAVBgNVBAcTDlNhbHQgTGFrZSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNU IE5ldHdvcmsxITAfBgNVBAsTGGh0dHA6Ly93d3cudXNlcnRydXN0LmNvbTE2MDQGA1UEAxMtVVRO LVVTRVJGaXJzdC1DbGllbnQgQXV0aGVudGljYXRpb24gYW5kIEVtYWlsMB4XDTExMDQyODAwMDAw MFoXDTIwMDUzMDEwNDgzOFowgZMxCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1hbmNo ZXN0ZXIxEDAOBgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9ETyBDQSBMaW1pdGVkMTkwNwYD VQQDEzBDT01PRE8gQ2xpZW50IEF1dGhlbnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCShIRbS1eY1F4vi6ThQMijU1hfZmXxMk73nzJ9 VdB4TFW3QpTg+SdxB8XGaaS5MsTxQBqQzCdWYn8XtXFpruUgG+TLY15gyqJB9mrho/+43x9IbWVD jCouK2M4d9+xF6zC2oIC1tQyatRnbyATj1w1+uVUgK/YcQodNwoCUFNslR2pEBS0mZVZEjH/CaLS TNxS297iQAFbSGjdxUq04O0kHzqvcV8H46y/FDuwJXFoPfQP1hdYRhWBPGiLi4MPbXohV+Y0sNsy fuNK4aVScmQmkU6lkg//4LFg/RpvaFGZY40ai6XMQpubfSJj06mg/M6ekN9EGfRcWzW6FvOnm//B AgMBAAGjggFLMIIBRzAfBgNVHSMEGDAWgBSJgmd9xJ0mcABLtFBIfN49rgRufTAdBgNVHQ4EFgQU ehNOAHRbxnhjZCfBL+KgW7x5xXswDgYDVR0PAQH/BAQDAgEGMBIGA1UdEwEB/wQIMAYBAf8CAQAw EQYDVR0gBAowCDAGBgRVHSAAMFgGA1UdHwRRME8wTaBLoEmGR2h0dHA6Ly9jcmwudXNlcnRydXN0 LmNvbS9VVE4tVVNFUkZpcnN0LUNsaWVudEF1dGhlbnRpY2F0aW9uYW5kRW1haWwuY3JsMHQGCCsG AQUFBwEBBGgwZjA9BggrBgEFBQcwAoYxaHR0cDovL2NydC51c2VydHJ1c3QuY29tL1VUTkFkZFRy dXN0Q2xpZW50X0NBLmNydDAlBggrBgEFBQcwAYYZaHR0cDovL29jc3AudXNlcnRydXN0LmNvbTAN BgkqhkiG9w0BAQUFAAOCAQEAhda+eFdVbTN/RFL+QtUGqAEDgIr7DbL9Sr/2r0FJ9RtaxdKtG3Nu PukmfOZMmMEwKN/L+0I8oSU+CnXW0D05hmbRoZu1TZtvryhsHa/l6nRaqNqxwPF1ei+eupN5yv7i kR5WdLL4jdPgQ3Ib7Y/9YDkgR/uLrzplSDyYPaUlv73vYOBJ5RbI6z9Dg/Dg7g3B080zX5vQvWBq szv++tTJOjwf7Zv/m0kzvkIpOYPuM2kugp1FTahp2oAbHj3SGl18R5mlmwhtEpmG1l1XBxunML5L SUS4kH7K0Xk467Qz+qA6XSZYnmFVGLQh1ZnV4ENAQjC+6qXnlNKw/vN1+X9u5zCCBSIwggQKoAMC AQICEQDlB7dXxclLEedquPvGX8CGMA0GCSqGSIb3DQEBBQUAMIGTMQswCQYDVQQGEwJHQjEbMBkG A1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQKExFDT01P RE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlvbiBhbmQg U2VjdXJlIEVtYWlsIENBMB4XDTEzMTIxNzAwMDAwMFoXDTE0MTIxNzIzNTk1OVowITEfMB0GCSqG SIb3DQEJARYQbXN3ZWV0QGFwcGxlLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB ANdvQYZRCVzc0wIYvIOn/0Pv7zUwuIvbAfM/W3FyemqZx3fdKxX4WxN2x5NC3hhBHGrUWirJH7rl 6It12bGQ61uHAK5jsJikV5k+mOYjZaKNIKxj0uYIk3MKQmsmM8t3nddq5mp2mxwV/U7AFPTz1fgh dkqTb/NkHY5eA8KqksaeqwfMgoaiGVeCUhptWnXosca8PAkb+i9u5rEok5zgY+QP0IuWLJENfA4q dEMsH+OAwMGOv9fNCgcdapFnjeSYaj70m6qUiq446+8a2rhUsEUKQayOMgjnm2bgUuNx7pOvs/Jg zIlZoTz/llmE1HWREGzSjRnLWwQ98fspfeZWA+8CAwEAAaOCAeAwggHcMB8GA1UdIwQYMBaAFHoT TgB0W8Z4Y2QnwS/ioFu8ecV7MB0GA1UdDgQWBBTtKBJoG9kxZisTqJg4+wr12l4stjAOBgNVHQ8B Af8EBAMCBaAwDAYDVR0TAQH/BAIwADAgBgNVHSUEGTAXBggrBgEFBQcDBAYLKwYBBAGyMQEDBQIw EQYJYIZIAYb4QgEBBAQDAgUgMEYGA1UdIAQ/MD0wOwYMKwYBBAGyMQECAQEBMCswKQYIKwYBBQUH AgEWHWh0dHBzOi8vc2VjdXJlLmNvbW9kby5uZXQvQ1BTMFcGA1UdHwRQME4wTKBKoEiGRmh0dHA6 Ly9jcmwuY29tb2RvY2EuY29tL0NPTU9ET0NsaWVudEF1dGhlbnRpY2F0aW9uYW5kU2VjdXJlRW1h aWxDQS5jcmwwgYgGCCsGAQUFBwEBBHwwejBSBggrBgEFBQcwAoZGaHR0cDovL2NydC5jb21vZG9j YS5jb20vQ09NT0RPQ2xpZW50QXV0aGVudGljYXRpb25hbmRTZWN1cmVFbWFpbENBLmNydDAkBggr BgEFBQcwAYYYaHR0cDovL29jc3AuY29tb2RvY2EuY29tMBsGA1UdEQQUMBKBEG1zd2VldEBhcHBs ZS5jb20wDQYJKoZIhvcNAQEFBQADggEBABg5KLQK5u9gGI75u+vYH/i6uMDKlpTILO/r/FpN2ibq pwAB2ln9oKvPIA1/r3o+DBC87TqnlJAiPW4ADFHpRmqlprb0Tu9p98nP/wl5tBZjEP8dY4iH0TB3 B2r9JHwRwwJQ20CqJpuCn9dmvL215sZSqvJfluVlIcAQCLxp3ZKMIC2pNKitswdjjHduaKuj2TMe xrzMtrRGRtFF9pcMcnsqE2QtJUqXPV7/M4WT2yRUmI4ThPt9O9fmPH2ku52hdb6t4qXvwdQSkDHt xo3J/Vc/jDR2/feedDhQmG0V9j6tHsuG6bVVhcGiWnSmSoPfg13FlQwlxZTyFtiMZ2jILyoxggOu MIIDqgIBATCBqTCBkzELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQ MA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxOTA3BgNVBAMTMENP TU9ETyBDbGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQQIRAOUHt1fFyUsR 52q4+8ZfwIYwCQYFKw4DAhoFAKCCAdkwGAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG 9w0BCQUxDxcNMTQwMjI2MDE1NjI0WjAjBgkqhkiG9w0BCQQxFgQUxKlgSlGthFxfFX3ThGryTT59 Z80wgboGCSsGAQQBgjcQBDGBrDCBqTCBkzELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIg TWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQx OTA3BgNVBAMTMENPTU9ETyBDbGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBD QQIRAOUHt1fFyUsR52q4+8ZfwIYwgbwGCyqGSIb3DQEJEAILMYGsoIGpMIGTMQswCQYDVQQGEwJH QjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQK ExFDT01PRE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlv biBhbmQgU2VjdXJlIEVtYWlsIENBAhEA5Qe3V8XJSxHnarj7xl/AhjANBgkqhkiG9w0BAQEFAASC AQDJW4YD5wjJWu/FOFTE9yG3Ng2YuAsm86dXS9+NoXMXDYIZjpMIuc21LoZ1oG2zQoQvbqW9j3RH bpm2g2i0CgFAyO6LC3Av8jq+MWGfK73TI4BfeyNGWDrrRzWme0euW2ZVUUelAOLMdR1nrXF+6HQG 95nb6I8z4G/xUUNCPjXp3YZ66a38i3xYhfTGGgZS9QpQ/TSQ5lV4BTDKL5NYvYka+wgY6aHtSslC f102T2pskExixFWE6CXJpHu7AIl66JPBwHXESlBSj6N1VKOCbtM/pEXmm1h2plVv4eVjsyeDnCvc czptyVzYCqBQ0thWGC2ewJ8P0OKUyYdc1fv8OurcAAAAAAAA --Apple-Mail=_4C884E6A-37BC-42E7-A826-839B3B54822A--