Date: Thu, 30 Oct 2003 19:42:29 -0800 From: Lars Eggert <larse@ISI.EDU> To: eischen@vigrid.com Cc: current@freebsd.org Subject: Re: wi problem with message > 7400 bytes Message-ID: <3FA1DA25.5060501@isi.edu> In-Reply-To: <Pine.GSO.4.10.10310302037260.3366-100000@pcnet5.pcnet.com> References: <Pine.GSO.4.10.10310302037260.3366-100000@pcnet5.pcnet.com>
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This is a cryptographically signed message in MIME format. --------------ms040608070207050700030001 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Daniel Eischen wrote: > Greetings, > > I'm having a problem receiving UDP messages over a wi interface: > > wi1: <Dell TrueMobile 1150 Series PC Card> at port 0x180-0x1bf irq 11 function 0 config 1 on pccard0 > wi1: 802.11 address: 00:02:2d:4a:d8:7d > wi1: using Lucent Technologies, WaveLAN/IEEE > wi1: Lucent Firmware: Station (6.10.1) > wi1: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps > > (wi0 is also a 'Dell TrueMobile 1150 Series PC Card' in > a mini-PCI card, but hangs the system when you try and > configure it -- so it obviously isn't configured in this > set up.) > > I have a small program that does a trivial UDP test: > > http://people.freebsd.org/~deischen/udptest.c > > My results show that: > > o Receiving large (> 7400 bytes) messages does not work. > > o Sending large messages works. > > o Sending & receiving large messages over a wired > interface (dc, fxp, etc) works. > > Am I suppose to be able to receive UDP messages larger > than 7400 bytes over the air? Could you post a tcpdump for each case? I wonder if this is related to a fragmentation issue I've seen in the past. Thanks, Lars -- Lars Eggert <larse@isi.edu> USC Information Sciences Institute --------------ms040608070207050700030001 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 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJtjCC AzgwggKhoAMCAQICEGZFcrfMdPXPY3ZFhNAukQEwDQYJKoZIhvcNAQEEBQAwgdExCzAJBgNV BAYTAlpBMRUwEwYDVQQIEwxXZXN0ZXJuIENhcGUxEjAQBgNVBAcTCUNhcGUgVG93bjEaMBgG A1UEChMRVGhhd3RlIENvbnN1bHRpbmcxKDAmBgNVBAsTH0NlcnRpZmljYXRpb24gU2Vydmlj ZXMgRGl2aXNpb24xJDAiBgNVBAMTG1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBDQTErMCkG CSqGSIb3DQEJARYccGVyc29uYWwtZnJlZW1haWxAdGhhd3RlLmNvbTAeFw0wMDA4MzAwMDAw MDBaFw0wNDA4MjcyMzU5NTlaMIGSMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBD YXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xDzANBgNVBAoTBlRoYXd0ZTEdMBsGA1UECxMUQ2Vy dGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNvbmFsIEZyZWVtYWlsIFJTQSAyMDAw 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