kern/144000: [tcp] ignore set TCP_MAXSEG by setsockopt()

[Andrey Zonov]

The following reply was made to PR kern/144000; it has been noted by GNATS.

From: Andrey Zonov <andrey.zonov at gmail.com>
To: bug-followup at FreeBSD.org, jhb at freebsd.org
Cc:  
Subject: Re: kern/144000: [tcp] ignore set TCP_MAXSEG by setsockopt()
Date: Thu, 25 Feb 2010 11:49:00 +0300

 --00151758b020ad57aa048068da47
 Content-Type: text/plain; charset=ISO-8859-1
 
 I have found patch at [1] and adapted for 8.0-p1
 
 jhb, why you not added this patch in HEAD?
 
 
 [1] http://people.freebsd.org/~jhb/patches/tcp_maxseg.patch
 
 
 -- 
 Andrey Zonov
 
 --00151758b020ad57aa048068da47
 Content-Type: text/plain; charset=US-ASCII; name="tcp_maxseg_r80-p1.patch.txt"
 Content-Disposition: attachment; filename="tcp_maxseg_r80-p1.patch.txt"
 Content-Transfer-Encoding: base64
 X-Attachment-Id: f_g63b7nu60
 
 LS0tIHN5cy9uZXRpbmV0L3RjcF9pbnB1dC5jLm9yaWcJMjAwOS0xMi0xNiAxNToxMjo0My4wMDAw
 MDAwMDAgKzAzMDAKKysrIHN5cy9uZXRpbmV0L3RjcF9pbnB1dC5jCTIwMTAtMDItMjQgMTc6MDk6
 MjkuMDAwMDAwMDAwICswMzAwCkBAIC0zMTIyLDYgKzMxMjIsMTIgQEAKIAkJcmV0dXJuOwogCX0K
 IAorCWlmICh0cC0+dF91c2VybXNzKSB7CisJCWlmIChtYXhtdHUgPiAodHAtPnRfdXNlcm1zcyAr
 IG1pbl9wcm90b2gpKQorCQkJbWF4bXR1ID0gdHAtPnRfdXNlcm1zcyArIG1pbl9wcm90b2g7CisJ
 CWlmIChvZmZlciA+IHRwLT50X3VzZXJtc3MpCisJCQlvZmZlciA9IHRwLT50X3VzZXJtc3M7CisJ
 fQogCS8qIFdoYXQgaGF2ZSB3ZSBnb3Q/ICovCiAJc3dpdGNoIChvZmZlcikgewogCQljYXNlIDA6
 Ci0tLSBzeXMvbmV0aW5ldC90Y3Bfb3V0cHV0LmMub3JpZwkyMDA5LTEyLTE2IDE1OjEyOjQ0LjAw
 MDAwMDAwMCArMDMwMAorKysgc3lzL25ldGluZXQvdGNwX291dHB1dC5jCTIwMTAtMDItMjQgMTc6
 MDk6MjkuMDAwMDAwMDAwICswMzAwCkBAIC02NTksNiArNjU5LDggQEAKIAkJaWYgKGZsYWdzICYg
 VEhfU1lOKSB7CiAJCQl0cC0+c25kX254dCA9IHRwLT5pc3M7CiAJCQl0by50b19tc3MgPSB0Y3Bf
 bXNzb3B0KCZ0cC0+dF9pbnBjYi0+aW5wX2luYyk7CisJCQlpZiAodHAtPnRfdXNlcm1zcyAmJiB0
 by50b19tc3MgPiB0cC0+dF91c2VybXNzKQorCQkJCXRvLnRvX21zcyA9IHRwLT50X3VzZXJtc3M7
 CiAJCQl0by50b19mbGFncyB8PSBUT0ZfTVNTOwogCQl9CiAJCS8qIFdpbmRvdyBzY2FsaW5nLiAq
 LwotLS0gc3lzL25ldGluZXQvdGNwX3N5bmNhY2hlLmMub3JpZwkyMDA5LTEyLTE2IDE1OjEyOjQ0
 LjAwMDAwMDAwMCArMDMwMAorKysgc3lzL25ldGluZXQvdGNwX3N5bmNhY2hlLmMJMjAxMC0wMi0y
 NCAxNzoyNzowOC4wMDAwMDAwMDAgKzAzMDAKQEAgLTk3NCw2ICs5NzQsNyBAQAogCXN0cnVjdCBt
 YnVmICppcG9wdHMgPSBOVUxMOwogCXVfaW50MzJfdCBmbG93dG1wOwogCWludCB3aW4sIHNiX2hp
 d2F0LCBpcF90dGwsIGlwX3Rvcywgbm9vcHQ7CisJdV9pbnQxNl90IHVzZXJtc3M7CiAJY2hhciAq
 czsKICNpZmRlZiBJTkVUNgogCWludCBhdXRvZmxvd2xhYmVsID0gMDsKQEAgLTEwMDcsNiArMTAw
 OCw3IEBACiAJd2luID0gc2JzcGFjZSgmc28tPnNvX3Jjdik7CiAJc2JfaGl3YXQgPSBzby0+c29f
 cmN2LnNiX2hpd2F0OwogCW5vb3B0ID0gKHRwLT50X2ZsYWdzICYgVEZfTk9PUFQpOworCXVzZXJt
 c3MgPSB0cC0+dF91c2VybXNzOwogCiAJLyogQnkgdGhlIHRpbWUgd2UgZHJvcCB0aGUgbG9jayB0
 aGVzZSBzaG91bGQgbm8gbG9uZ2VyIGJlIHVzZWQuICovCiAJc28gPSBOVUxMOwpAQCAtMTE0Miw2
 ICsxMTQ0LDcgQEAKIAlzYy0+c2NfaXNzID0gYXJjNHJhbmRvbSgpOwogCXNjLT5zY19mbGFncyA9
 IDA7CiAJc2MtPnNjX2Zsb3dsYWJlbCA9IDA7CisJc2MtPnNjX3VzZXJtc3MgPSB1c2VybXNzOwog
 CiAJLyoKIAkgKiBJbml0aWFsIHJlY2VpdmUgd2luZG93OiBjbGlwIHNic3BhY2UgdG8gWzAgLi4g
 VENQX01BWFdJTl0uCkBAIC0xMjA2LDggKzEyMDksMTEgQEAKICNlbmRpZgogCWlmICh0by0+dG9f
 ZmxhZ3MgJiBUT0ZfU0FDS1BFUk0pCiAJCXNjLT5zY19mbGFncyB8PSBTQ0ZfU0FDSzsKLQlpZiAo
 dG8tPnRvX2ZsYWdzICYgVE9GX01TUykKKwlpZiAodG8tPnRvX2ZsYWdzICYgVE9GX01TUykgewog
 CQlzYy0+c2NfcGVlcl9tc3MgPSB0by0+dG9fbXNzOwkvKiBwZWVyIG1zcyBtYXkgYmUgemVybyAq
 LworCQlpZiAoc2MtPnNjX3VzZXJtc3MgJiYgc2MtPnNjX3BlZXJfbXNzID4gc2MtPnNjX3VzZXJt
 c3MpCisJCQlzYy0+c2NfcGVlcl9tc3MgPSBzYy0+c2NfdXNlcm1zczsKKwl9CiAJaWYgKG5vb3B0
 KQogCQlzYy0+c2NfZmxhZ3MgfD0gU0NGX05PT1BUOwogCWlmICgodGgtPnRoX2ZsYWdzICYgKFRI
 X0VDRXxUSF9DV1IpKSAmJiBWX3RjcF9kb19lY24pCkBAIC0xMjgwLDYgKzEyODYsOCBAQAogCiAJ
 LyogRGV0ZXJtaW5lIE1TUyB3ZSBhZHZlcnRpemUgdG8gb3RoZXIgZW5kIG9mIGNvbm5lY3Rpb24u
 ICovCiAJbXNzb3B0ID0gdGNwX21zc29wdCgmc2MtPnNjX2luYyk7CisJaWYgKHNjLT5zY191c2Vy
 bXNzICYmIG1zc29wdCA+IHNjLT5zY191c2VybXNzKQorCQltc3NvcHQgPSBzYy0+c2NfdXNlcm1z
 czsKIAlpZiAoc2MtPnNjX3BlZXJfbXNzKQogCQltc3NvcHQgPSBtYXgoIG1pbihzYy0+c2NfcGVl
 cl9tc3MsIG1zc29wdCksIFZfdGNwX21pbm1zcyk7CiAKQEAgLTE2OTMsNiArMTcwMSw4IEBACiAK
 IAlzYy0+c2NfcnhtaXRzID0gMDsKIAlzYy0+c2NfcGVlcl9tc3MgPSB0Y3Bfc2NfbXNzdGFiW21z
 c107CisJaWYgKHNjLT5zY191c2VybXNzICYmIHNjLT5zY19wZWVyX21zcyA+IHNjLT5zY191c2Vy
 bXNzKQorCQlzYy0+c2NfcGVlcl9tc3MgPSBzYy0+c2NfdXNlcm1zczsKIAogCVRDUFNUQVRfSU5D
 KHRjcHNfc2NfcmVjdmNvb2tpZSk7CiAJcmV0dXJuIChzYyk7Ci0tLSBzeXMvbmV0aW5ldC90Y3Bf
 c3luY2FjaGUuaC5vcmlnCTIwMTAtMDItMjQgMTc6MjU6MjQuMDAwMDAwMDAwICswMzAwCisrKyBz
 eXMvbmV0aW5ldC90Y3Bfc3luY2FjaGUuaAkyMDEwLTAyLTI0IDE3OjI1OjAxLjAwMDAwMDAwMCAr
 MDMwMApAQCAtNjEsNiArNjEsNyBAQAogCXN0cnVjdAkJaW5fY29ubmluZm8gc2NfaW5jOwkvKiBh
 ZGRyZXNzZXMgKi8KIAlpbnQJCXNjX3J4dHRpbWU7CQkvKiByZXRyYW5zbWl0IHRpbWUgKi8KIAl1
 X2ludDE2X3QJc2NfcnhtaXRzOwkJLyogcmV0cmFuc21pdCBjb3VudGVyICovCisJdV9pbnQxNl90
 CXNjX3VzZXJtc3M7CQkvKiBVc2VyLXJlcXVlc3RlZCBtc3MgY2FwICovCiAJdV9pbnQzMl90CXNj
 X3RzcmVmbGVjdDsJCS8qIHRpbWVzdGFtcCB0byByZWZsZWN0ICovCiAJdV9pbnQzMl90CXNjX3Rz
 OwkJCS8qIG91ciB0aW1lc3RhbXAgdG8gc2VuZCAqLwogCXVfaW50MzJfdAlzY190c29mZjsJCS8q
 IHRzIG9mZnNldCB3LyBzeW5jb29raWVzICovCi0tLSBzeXMvbmV0aW5ldC90Y3BfdXNycmVxLmMu
 b3JpZwkyMDA5LTEyLTE2IDE1OjEyOjQ0LjAwMDAwMDAwMCArMDMwMAorKysgc3lzL25ldGluZXQv
 dGNwX3VzcnJlcS5jCTIwMTAtMDItMjQgMTc6MTc6MzYuMDAwMDAwMDAwICswMzAwCkBAIC0xMzM4
 LDExICsxMzM4LDE4IEBACiAJCQkJcmV0dXJuIChlcnJvcik7CiAKIAkJCUlOUF9XTE9DS19SRUNI
 RUNLKGlucCk7Ci0JCQlpZiAob3B0dmFsID4gMCAmJiBvcHR2YWwgPD0gdHAtPnRfbWF4c2VnICYm
 Ci0JCQkgICAgb3B0dmFsICsgNDAgPj0gVl90Y3BfbWlubXNzKQotCQkJCXRwLT50X21heHNlZyA9
 IG9wdHZhbDsKLQkJCWVsc2UKLQkJCQllcnJvciA9IEVJTlZBTDsKKwkJCWlmICgoc28tPnNvX3N0
 YXRlICYgU1NfSVNDT05ORUNURUQpID09IDApIHsKKwkJCQlpZiAob3B0dmFsID4gMCAmJiBvcHR2
 YWwgKyA0MCA+PSB0Y3BfbWlubXNzKQorCQkJCQl0cC0+dF91c2VybXNzID0gb3B0dmFsOworCQkJ
 CWVsc2UKKwkJCQkJZXJyb3IgPSBFSU5WQUw7CisJCQl9IGVsc2UgeworCQkJCWlmIChvcHR2YWwg
 PiAwICYmIG9wdHZhbCA8PSB0cC0+dF9tYXhzZWcgJiYKKwkJCQkgICAgb3B0dmFsICsgNDAgPj0g
 dGNwX21pbm1zcykKKwkJCQkJdHAtPnRfbWF4c2VnID0gb3B0dmFsOworCQkJCWVsc2UKKwkJCQkJ
 ZXJyb3IgPSBFSU5WQUw7CisJCQl9CiAJCQlJTlBfV1VOTE9DSyhpbnApOwogCQkJYnJlYWs7CiAK
 QEAgLTEzNzUsNyArMTM4MiwxMCBAQAogCQkJZXJyb3IgPSBzb29wdGNvcHlvdXQoc29wdCwgJm9w
 dHZhbCwgc2l6ZW9mIG9wdHZhbCk7CiAJCQlicmVhazsKIAkJY2FzZSBUQ1BfTUFYU0VHOgotCQkJ
 b3B0dmFsID0gdHAtPnRfbWF4c2VnOworCQkJaWYgKChzby0+c29fc3RhdGUgJiBTU19JU0NPTk5F
 Q1RFRCkgPT0gMCkKKwkJCQlvcHR2YWwgPSB0cC0+dF91c2VybXNzOworCQkJZWxzZQorCQkJCW9w
 dHZhbCA9IHRwLT50X21heHNlZzsKIAkJCUlOUF9XVU5MT0NLKGlucCk7CiAJCQllcnJvciA9IHNv
 b3B0Y29weW91dChzb3B0LCAmb3B0dmFsLCBzaXplb2Ygb3B0dmFsKTsKIAkJCWJyZWFrOwotLS0g
 c3lzL25ldGluZXQvdGNwX3Zhci5oLm9yaWcJMjAwOS0xMi0xNiAxNToxMjo0NC4wMDAwMDAwMDAg
 KzAzMDAKKysrIHN5cy9uZXRpbmV0L3RjcF92YXIuaAkyMDEwLTAyLTI0IDE3OjM5OjAwLjAwMDAw
 MDAwMCArMDMwMApAQCAtMjAzLDYgKzIwMyw3IEBACiAJaW50CXRfaXNwYXJlOwkJLyogZXhwbGlj
 aXQgcGFkIGZvciA2NGJpdCBhbGlnbm1lbnQgKi8KIAl2b2lkCSp0X3BzcGFyZTJbNl07CQkvKiAy
 IENDIC8gNCBUQkQgKi8KIAl1aW50NjRfdCBfcGFkWzEyXTsJCS8qIDcgVVRPLCA1IFRCRCAoMS0y
 IENDL1JUVD8pICovCisJdV9pbnQJdF91c2VybXNzOwkJLyogVXNlciByZXF1ZXN0ZWQgdF9tYXhz
 ZWcgKi8KIH07CiAKIC8qCg==
 --00151758b020ad57aa048068da47--