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Message-Id: <200210211901.g9LJ1ObS006867@www.freebsd.org>
Date: Mon, 21 Oct 2002 12:01:24 -0700 (PDT)
From: "Dmitry Y. Bordakov" <dmitry_bordakov@agilent.com>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/44355: After deletion of an IPv6 alias, the route to the whole subnet is removed too.
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>Number:         44355
>Category:       kern
>Synopsis:       After deletion of an IPv6 alias, the route to the whole subnet is removed too.
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 21 12:10:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Dmitry Y. Bordakov
>Release:        4.4-RELEASE
>Organization:
Agilent Technologies, Inc.
>Environment:
FreeBSD qar1 4.4-RELEASE FreeBSD 4.4-RELEASE #14: Fri Oct 11 19:55:37 GMT 2002     root@qar1:/usr/src/sys/compile/QAR44GENERIC.znb  i386

>Description:
You configured several IPv6 aliases in one subnet (with the same prefix) on one network interface, for example, 3ffe::1, 3ffe::2, 3ffe::3, etc, all on fxp0.
During the first alias configuration, the network stack automatically configured an appropriate route to the network, in our example, 3ffe::/64 -> link#1 .
Deletion of one of the aliases causes deletion of the route and, therefore, unreachability of the remote addresses in the same subnet, for example, ping6 3ffe::123 returns "No route to host".

>How-To-Repeat:
ifconfig lo0 inet6 add 3ffe::1
ifconfig lo0 inet6 add 3ffe::2
netstat -nr | grep lo0
                          ...
                          3ffe::/64       fe80::1%lo0   Uc    lo0
                          3ffe::1         link#2        UHL   lo0
                          3ffe::2         link#2        UHL   lo0
                          ...
ifconfig lo0 inet6 delete 3ffe::1
netstat -nr | grep lo0
                          ...
                          3ffe::2         link#2        UHL   lo0
                          ...


>Fix:
begin 644 in6.c.diff
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M#0HK*RL@:6XV+F,)5&AU($]C="`Q,"`R,3HU,#HQ-B`R,#`R#0I`0"`M-CDS
M+#8@*S8Y,RPX($!`#0H@"0D)"0D)("`@(&4I.PT*(`D)"0D)?0T*(`D)"0E]
M#0HK"0D)?65L<V5[#0HK"0D)"2LK<'(M/FYD<')?<F5F8VYT.PT*(`D)"7T-
M"B`-"B`)"0DO*@T*0$`@+3<P,BPV("LW,#0L-R!`0`T*(`D)"2`J+PT*(`D)
M"7!F>&QI<W1?;VYL:6YK7V-H96-K*"D[#0H@"0E]#0HK#0H@"0EB<F5A:SL-
M"B`)?0T*(`T*0$`@+3<S.2PQ-B`K-S0R+#(S($!`#0H@"0D@*B`R+B!T:&4@
M861D<F5S<R!D;V5S(&YO="!O8F5Y(&%U=&]C;VYF(&%N9"!T:&5R92!I<R!N
M;PT*(`D)("H@("`@;W1H97(@;W=N97(@;V8@=&AE('!R969I>"X-"B`)"2`J
M+PT*+0D):68@*"AP<B`](&YD-E]P<F5F:7A?;&]O:W5P*"9P<C`I*2`A/2!.
M54Q,("8F#0HM"0D@("`@*"@H:6$M/FEA-E]F;&%G<R`F($E.-E])1D9?0554
M3T-/3D8I("$](#`@)B8-"BT)"2`@("`@('!R+3YN9'!R7W)E9F-N="`]/2`Q
M*2!\?`T*+0D)("`@("`H*&EA+3YI839?9FQA9W,@)B!)3C9?249&7T%55$]#
M3TY&*2`]/2`P("8F#0HM"0D@("`@("!P<BT^;F1P<E]R969C;G0@/3T@,"DI
M*2![#0HM"0D)<'(M/FYD<')?97AP:7)E(#T@,3L@+RH@6%A8.B!J=7-T(&9O
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M;V]K=7`H)G!R,"DI("$]($Y53$P@*7L-"BL-"BL)"0EI9B@@*"AI82T^:6$V
M7V9L86=S("8@24XV7TE&1E]!551/0T].1BD@/3T@,"D@)B8-"BL)"0D@("`@
M*'!R+3YN9'!R7W)E9F-N="`^(#`I("D@+2UP<BT^;F1P<E]R969C;G0[#0HK
M#0HK"0D):68@*"@H:6$M/FEA-E]F;&%G<R`F($E.-E])1D9?05543T-/3D8I
M("$](#`@)B8-"BL)"0D@("`@("!P<BT^;F1P<E]R969C;G0@/3T@,2D@?'P-
M"BL)"0D@("`@("@H:6$M/FEA-E]F;&%G<R`F($E.-E])1D9?05543T-/3D8I
M(#T](#`@)B8-"BL)"0D@("`@("!P<BT^;F1P<E]R969C;G0@/3T@,"DI('L-
M"BL)"0D)<'(M/FYD<')?97AP:7)E(#T@,3L@+RH@6%A8.B!J=7-T(&9O<B!E
M>'!I<F%T:6]N("HO#0HK"0D)?0T*(`D)?0T*(`T*(`D@('!U<F=E861D<CH-
M"B`)"6EN-E]P=7)G96%D9'(H)FEA+3YI85]I9F$I.PT**PT*(`D)8G)E86L[
*#0H@"7T-"B`-"@``
`
end

begin 644 in6_ifattach.c.diff
M+2TM(&EN-E]I9F%T=&%C:"YC+BXP;W)I9VEN86P)1G)I($]C="`Q,2`Q.3HU
M,CHR-"`R,#`R#0HK*RL@:6XV7VEF871T86-H+F,)1G)I($]C="`Q,2`Q.3HU
M,CHR-"`R,#`R#0I`0"`M-#(Y+#8@*S0R.2PW($!`#0H@"7-T<G5C="!I;C9?
M:69A9&1R("II83L-"B`)<W1R=6-T(&EN-E]A;&EA<W)E<2!I9G)A.PT*(`ES
M=')U8W0@;F1?<')E9FEX('!R,#L-"BL)<W1R=6-T(&YD7W!R969I>"H@<'([
M#0H@"6EN="!I+"!E<G)O<CL-"B`-"B`)+RH-"D!`("TU-30L,3$@*S4U-2PQ
M.2!`0`T*(`D@*B!A9&1R97-S+"!A;F0@=&AE;B!R96-O;F9I9W5R92!A;F]T
M:&5R(&]N92P@=&AE('!R969I>"!I<R!S=&EL;`T*(`D@*B!V86QI9"!W:71H
M(')E9F5R<FEN9R!T;R!T:&4@;VQD(&QI;FLM;&]C86P@861D<F5S<RX-"B`)
M("HO#0HM"6EF("AN9#9?<')E9FEX7VQO;VMU<"@F<'(P*2`]/2!.54Q,*2![
M#0HM"0EI9B`H*&5R<F]R(#T@;F0V7W!R96QI<W1?861D*"9P<C`L($Y53$PL
M($Y53$PI*2`A/2`P*0T**PEI9B@@*'!R(#T@;F0V7W!R969I>%]L;V]K=7`H
M)G!R,"DI(#T]($Y53$P@*7L-"BL)"6EF("@H97)R;W(@/2!N9#9?<')E;&ES
M=%]A9&0H)G!R,"P@3E5,3"P@)G!R*2D@(3T@,"D-"B`)"0ER971U<FXH97)R
M;W(I.PT*(`E]#0H@#0HK"6EF*"!P<B`]/2!.54Q,("E[#0HK#0HK"0EL;V<H
M($Q/1U]%4E(L(")N9#9?<')E;&ES=%]A9&0H*2!S=6-C961E9"!B=70@;F\@
M<')E9FEX7&XB("D[#0HK"0ER971U<FX@14E.5D%,.R`O*B!P86YI8R!H97)E
M/R`J+PT**PE]96QS97L-"BL)"2LK<'(M/FYD<')?<F5F8VYT.PT**PE]#0HK
7"0T*(`ER971U<FX@,#L-"B!]#0H@#0H`
`
end

>Release-Note:
>Audit-Trail:
>Unformatted:

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