Date: Tue, 01 May 2001 11:01:42 -0700 From: Lars Eggert <larse@ISI.EDU> To: Gunther Schadow <gunther@aurora.regenstrief.org> Cc: snap-users@kame.net, freebsd-net@freebsd.org, ipfilter@coombs.anu.edu.au, altq@csl.sony.co.jp Subject: Re: The future of ALTQ, IPsec & IPFILTER playing together ... Message-ID: <3AEEFA06.BA0EB9FD@isi.edu> References: <3AEEEE79.8F7CC7B0@aurora.regenstrief.org> <3AEEF26B.C6850070@isi.edu> <3AEEF59D.3D5622DE@aurora.regenstrief.org>
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This is a cryptographically signed message in MIME format. --------------ms116D5F4703F959169E5EA677 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Gunther Schadow wrote: > However, I am afraid that ALTQ > is not supported on gif pseudo-devices as it seems that ALTQ wants > to deal with things like DMA etc, i.e., real NIC hardware. ALTQ kicks in at the boundary between network and link layer - basically, it replaces the send queue of an interface with something more interesting than the default FIFO. The drivers themselves remain essentially unchanged. That's the good news. The bad news is that all the gif device does is prepend another IP header, and call ip_output(). Which means that it has no outgoing queue to which you could apply ALTQ to. I think this is different from Dummynet, which happens inside ip_output() and does its own buffering. I didn't realize this when I sent me earlier mail, this may be a problem for you. I have used Dummynet on tunnels before and know it works. I assumed ALTQ would, too - but now that I thought more about it, there are issues. Maybe Kenjiro and Itojun (who have a much better understanding of the details of the networking stack than me) have some ideas how to make this work? Lars -- Lars Eggert <larse@isi.edu> Information Sciences Institute http://www.isi.edu/larse/ University of Southern California --------------ms116D5F4703F959169E5EA677 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIIIwYJKoZIhvcNAQcCoIIIFDCCCBACAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCC BfQwggLYMIICQaADAgECAgMDIwUwDQYJKoZIhvcNAQEEBQAwgZQxCzAJBgNVBAYTAlpBMRUw EwYDVQQIEwxXZXN0ZXJuIENhcGUxFDASBgNVBAcTC0R1cmJhbnZpbGxlMQ8wDQYDVQQKEwZU aGF3dGUxHTAbBgNVBAsTFENlcnRpZmljYXRlIFNlcnZpY2VzMSgwJgYDVQQDEx9QZXJzb25h bCBGcmVlbWFpbCBSU0EgMTk5OS45LjE2MB4XDTAwMDgyNDIwMzAwOFoXDTAxMDgyNDIwMzAw OFowVDEPMA0GA1UEBBMGRWdnZXJ0MQ0wCwYDVQQqEwRMYXJzMRQwEgYDVQQDEwtMYXJzIEVn Z2VydDEcMBoGCSqGSIb3DQEJARYNbGFyc2VAaXNpLmVkdTCBnzANBgkqhkiG9w0BAQEFAAOB jQAwgYkCgYEAz1yfcNs53rvhuw8gSDvr2+/snP8GduYY7x7WkJdyvcwb4oipNpWYIkMGP214 Zv1KrgvntGaG+jeugAGQt0n64VusgcIzQ6QDRtnMgdQDTAkVSQ2eLRSQka+nAPx6SFKJg79W EEHmgKQBMtZdMBYtYv/mTOcpm7jTJVg+7W6n04UCAwEAAaN3MHUwKgYFK2UBBAEEITAfAgEA MBowGAIBBAQTTDJ1TXlmZkJOVWJOSkpjZFoyczAYBgNVHREEETAPgQ1sYXJzZUBpc2kuZWR1 MAwGA1UdEwEB/wQCMAAwHwYDVR0jBBgwFoAUiKvxYINmVfTkWMdGHcBhvSPXw4wwDQYJKoZI hvcNAQEEBQADgYEAi65fM/jSCaPhRoA9JW5X2FktSFhE5zkIpFVPpv33GWPPNrncsK13HfZm s0B1rNy2vU7UhFI/vsJQgBJyffkLFgMCjp3uRZvBBjGD1q4yjDO5yfMMjquqBpZtRp5op3lT d01faA58ZCB5sxCb0ORSxvXR8tc9DJO0JIpQILa6vIAwggMUMIICfaADAgECAgELMA0GCSqG SIb3DQEBBAUAMIHRMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBDYXBlMRIwEAYD VQQHEwlDYXBlIFRvd24xGjAYBgNVBAoTEVRoYXd0ZSBDb25zdWx0aW5nMSgwJgYDVQQLEx9D ZXJ0aWZpY2F0aW9uIFNlcnZpY2VzIERpdmlzaW9uMSQwIgYDVQQDExtUaGF3dGUgUGVyc29u YWwgRnJlZW1haWwgQ0ExKzApBgkqhkiG9w0BCQEWHHBlcnNvbmFsLWZyZWVtYWlsQHRoYXd0 ZS5jb20wHhcNOTkwOTE2MTQwMTQwWhcNMDEwOTE1MTQwMTQwWjCBlDELMAkGA1UEBhMCWkEx FTATBgNVBAgTDFdlc3Rlcm4gQ2FwZTEUMBIGA1UEBxMLRHVyYmFudmlsbGUxDzANBgNVBAoT BlRoYXd0ZTEdMBsGA1UECxMUQ2VydGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNv bmFsIEZyZWVtYWlsIFJTQSAxOTk5LjkuMTYwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGB ALNpWpfU0BYLerXFXekhnCNyzRJMS/d+z8f7ynIk9EJSrFeV43theheE5/1yOTiUtOrtZaeS Bl694GX2GbuUeXZMPrlocHWEHPQRdAC8BSxPCQMXMcz0QdRyxqZd4ohEsIsuxE3x8NaFPmzz lZR4kX5A6ZzRjRVXjsJz5TDeRvVPAgMBAAGjNzA1MBIGA1UdEwEB/wQIMAYBAf8CAQAwHwYD VR0jBBgwFoAUcknCczTGVfQLdnKBfnf0h+fGsg4wDQYJKoZIhvcNAQEEBQADgYEAa8ZZ6TH6 6bbssQPY33Jy/pFgSOrGVd178GeOxmFw523CpTfYnbcXKFYFi91cdW/GkZDGbGZxE9AQfGuR b4bgITYtwdfqsgmtzy1txoNSm/u7/pyHnfy36XSS5FyXrvx+rMoNb3J6Zyxrc/WG+Z31AG70 HQfOnZ6CYynvkwl+Vd4xggH3MIIB8wIBATCBnDCBlDELMAkGA1UEBhMCWkExFTATBgNVBAgT DFdlc3Rlcm4gQ2FwZTEUMBIGA1UEBxMLRHVyYmFudmlsbGUxDzANBgNVBAoTBlRoYXd0ZTEd MBsGA1UECxMUQ2VydGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNvbmFsIEZyZWVt YWlsIFJTQSAxOTk5LjkuMTYCAwMjBTAJBgUrDgMCGgUAoIGxMBgGCSqGSIb3DQEJAzELBgkq hkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTAxMDUwMTE4MDE0MlowIwYJKoZIhvcNAQkEMRYE FJy7Mipw0RgGpTRhEPkQrdpG+4zAMFIGCSqGSIb3DQEJDzFFMEMwCgYIKoZIhvcNAwcwDgYI KoZIhvcNAwICAgCAMAcGBSsOAwIHMA0GCCqGSIb3DQMCAgFAMA0GCCqGSIb3DQMCAgEoMA0G CSqGSIb3DQEBAQUABIGAokU6KeKXq055ClTo524Hul9qBYgUDlEUQlWNjhy9/8CVMu1CoWqk 5fK/q6NI7T7R3CvHqZvheOQk6i2SaOynF+SO4m2WrqHDh+r59EpK7sp0TjS00JWtvj3NbqGB p3seN5AkFXMqAG00vnz7KHcZX55Vp8un5bUHHixQwcxgwvM= --------------ms116D5F4703F959169E5EA677-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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