[support] strange error when porting the umip-0.4 mip6d to ARM

[liu jianwei]

hi, everyone,
I have this strange error when porting the umip-0.4 mip6d code and
2.6.23 kernel from the USAGI to the S3C2410 board.
The same kernel and mip6d works fine in a notebook. The only
difference I could think about is the driver of the wireless card.
In the notebook, the driver is the original dirver of intel 2200n;
while in the board, the driver is the rt73 cross-compiled by
ourselves.

The phenomenon now is that the notebook could send out BU, while the
board can't. Actually, from the comparison of the printed debug info
of mip6d in both platfroms,
I think the board have not called the md_change_default_router funtion
while that in the notebook did.

The mip6d.conf is similar too.

but there is one thing I can't understand. Which function calls
md_change_default_router? I have added MDBG debug info in both
md_change_to_backup_router and
md_check_default_router. But they are neither printed out in the
notbook, while the debug info in md_change_default_router printed out.

anyone knows why this function is not called in the board?

****************
The debug info in notebook

root at tti-laptop:~# mip6d -c
/root/Desktop/final/mn/common/no-ipssec/mn-mip6d-ok.conf
mip6d[6928]: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 started (Mobile Node)
Wed May 13 16:36:46 main: MIPL Mobile IPv6 for Linux started in debug
mode, not detaching from terminal
Wed May 13 16:36:46 conf_show: config_file =
/root/Desktop/final/mn/common/no-ipssec/mn-mip6d-ok.conf
Wed May 13 16:36:46 conf_show: mip6_entity = 1
Wed May 13 16:36:46 conf_show: debug_level = 10
Wed May 13 16:36:46 conf_show: debug_log_file = stderr
Wed May 13 16:36:46 conf_show: PolicyModulePath = [internal]
Wed May 13 16:36:46 conf_show: DefaultBindingAclPolicy = 0
Wed May 13 16:36:46 conf_show: NonVolatileBindingCache = disabled
Wed May 13 16:36:46 conf_show: KeyMngMobCapability = disabled
Wed May 13 16:36:46 conf_show: UseMnHaIPsec = disabled
Wed May 13 16:36:46 conf_show: MnMaxHaBindingLife = 262140
Wed May 13 16:36:46 conf_show: MnMaxCnBindingLife = 420
Wed May 13 16:36:46 conf_show: MnRouterProbes = 0
Wed May 13 16:36:46 conf_show: MnRouterProbeTimeout = 0.000000
Wed May 13 16:36:46 conf_show: InitialBindackTimeoutFirstReg = 1.500000
Wed May 13 16:36:46 conf_show: InitialBindackTimeoutReReg = 1.000000
Wed May 13 16:36:46 conf_show: UseCnBuAck = disabled
Wed May 13 16:36:46 conf_show: DoRouteOptimizationMN = enabled
Wed May 13 16:36:46 conf_show: MnUseAllInterfaces = disabled
Wed May 13 16:36:46 conf_show: MnDiscardHaParamProb = disabled
Wed May 13 16:36:46 conf_show: SendMobPfxSols = enabled
Wed May 13 16:36:46 conf_show: OptimisticHandoff = disabled
Wed May 13 16:36:46 conf_show: SendMobPfxAdvs = enabled
Wed May 13 16:36:46 conf_show: SendUnsolMobPfxAdvs = enabled
Wed May 13 16:36:46 conf_show: MaxMobPfxAdvInterval = 86400
Wed May 13 16:36:46 conf_show: MinMobPfxAdvInterval = 600
Wed May 13 16:36:46 conf_show: HaMaxBindingLife = 262140
Wed May 13 16:36:46 conf_show: DoRouteOptimizationCN = enabled
Wed May 13 16:36:46 xfrm_cn_init: Adding policies and states for CN
Wed May 13 16:36:46 xfrm_mn_init: Adding policies and states for MN
Wed May 13 16:36:46 conf_home_addr_info: HoA address 3ffe:0:0:2:0:0:0:2
Wed May 13 16:36:46 conf_home_addr_info: HA address 3ffe:0:0:2:0:0:0:1
Wed May 13 16:36:46 __tunnel_add: created tunnel ip6tnl1 (11) from
3ffe:0:0:2:0:0:0:2 to 3ffe:0:0:2:0:0:0:1 user count 1
Wed May 13 16:36:46 conf_home_addr_info: Home address 3ffe:0:0:2:0:0:0:2
Wed May 13 16:36:46 flag_hoa: set HoA 3ffe:0:0:2:0:0:0:2/128 iif 11
flags 12 preferred_time 4294967295 valid_time 4294967295
Wed May 13 16:36:46 conf_home_addr_info: Added new home_addr_info successfully
Wed May 13 16:36:46 __md_discover_router: discover link on iface eth1 (4)
Wed May 13 16:36:48 md_change_default_router: add new router
fe80:0:0:0:211:5bff:fe2f:5cb7 on interface eth1 (4)
Wed May 13 16:36:48 md_update_router_stats: add coa
3ffe:0:0:2:215:ff:fe4d:7046 on interface (4)
Wed May 13 16:36:49 mn_addr_do_dad: DAD succeeded!
Wed May 13 16:36:49 mn_addr_do_dad: address = 3ffe:0:0:2:0:0:0:2
Wed May 13 16:36:49 mn_move: 1578
Wed May 13 16:36:49 mn_move: in home net
Wed May 13 16:36:49 mv_hoa: move HoA 3ffe:0:0:2:0:0:0:2/64 from iface 11 to 4
Wed May 13 16:36:51 md_update_router_stats: add coa
3ffe:0:0:2:215:ff:fe4d:7046 on interface (4)
Wed May 13 16:36:54 md_update_router_stats: add coa
3ffe:0:0:2:215:ff:fe4d:7046 on interface (4)


that in the board

/ # mip6d -c /mnt/ext1/lost\+found/m.conf
mip6d[855]: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 started (Mobile Node)
Thu Jan  1 00:07:43 main: MIPL Mobile IPv6 for Linux started in debug
mode, not detaching from terminal
Thu Jan  1 00:07:43 conf_show: config_file = /mnt/ext1/lost+found/m.conf
Thu Jan  1 00:07:43 conf_show: vt_hostname = localhost
Thu Jan  1 00:07:43 conf_show: vt_service = 7777
Thu Jan  1 00:07:43 conf_show: mip6_entity = 1
Thu Jan  1 00:07:43 conf_show: debug_level = 10
Thu Jan  1 00:07:43 conf_show: debug_log_file = stderr
Thu Jan  1 00:07:43 conf_show: PolicyModulePath = [internal]
Thu Jan  1 00:07:43 conf_show: DefaultBindingAclPolicy = 0
Thu Jan  1 00:07:43 conf_show: NonVolatileBindingCache = disabled
Thu Jan  1 00:07:43 conf_show: KeyMngMobCapability = disabled
Thu Jan  1 00:07:43 conf_show: UseMnHaIPsec = disabled
Thu Jan  1 00:07:43 conf_show: MnMaxHaBindingLife = 262140
Thu Jan  1 00:07:43 conf_show: MnMaxCnBindingLife = 420
Thu Jan  1 00:07:43 conf_show: MnRouterProbes = 0
Thu Jan  1 00:07:43 conf_show: MnRouterProbeTimeout = 0.000000
Thu Jan  1 00:07:43 conf_show: InitialBindackTimeoutFirstReg = 1.500000
Thu Jan  1 00:07:43 conf_show: InitialBindackTimeoutReReg = 1.000000
Thu Jan  1 00:07:43 conf_show: UseCnBuAck = disabled
Thu Jan  1 00:07:43 conf_show: DoRouteOptimizationMN = enabled
Thu Jan  1 00:07:43 conf_show: MnUseAllInterfaces = disabled
Thu Jan  1 00:07:43 conf_show: MnDiscardHaParamProb = disabled
Thu Jan  1 00:07:43 conf_show: SendMobPfxSols = enabled
Thu Jan  1 00:07:43 conf_show: OptimisticHandoff = disabled
Thu Jan  1 00:07:43 conf_show: SendMobPfxAdvs = enabled
Thu Jan  1 00:07:43 conf_show: SendUnsolMobPfxAdvs = enabled
Thu Jan  1 00:07:43 conf_show: MaxMobPfxAdvInterval = 86400
Thu Jan  1 00:07:43 conf_show: MinMobPfxAdvInterval = 600
Thu Jan  1 00:07:43 conf_show: HaMaxBindingLife = 262140
Thu Jan  1 00:07:43 conf_show: DoRouteOptimizationCN = enabled
Thu Jan  1 00:07:43 xfrm_cn_init: Adding policies and states for CN
Thu Jan  1 00:07:43 xfrm_mn_init: Adding policies and states for MN
Thu Jan  1 00:07:44 conf_home_addr_info: HoA address 3ffe:0:0:2:0:0:0:2
Thu Jan  1 00:07:44 conf_home_addr_info: HA address 3ffe:0:0:2:0:0:0:1
Thu Jan  1 00:07:44 __tunnel_add: created tunnel ip6tnl1 (5) from
3ffe:0:0:2:0:0:0:2 to 3ffe:0:0:2:0:0:0:1 user count 1
Thu Jan  1 00:07:44 conf_home_addr_info: Home address 3ffe:0:0:2:0:0:0:2
Thu Jan  1 00:07:44 flag_hoa: set HoA 3ffe:0:0:2:0:0:0:2/128 iif 5
flags 12 preferred_time 4294967295 valid_time 4294967295
Thu Jan  1 00:07:44 conf_home_addr_info: Added new home_addr_info successfully
mip6d[855]: Interface 2 (sit0):type 776 unsupported
Thu Jan  1 00:07:44 __md_discover_router: discover link on iface eth0 (4)
Thu Jan  1 00:07:48 __md_discover_router: discover link on iface eth0 (4)
mip6d[864]: terminated (SIGINT)
Thu Jan  1 00:07:50 terminate: got SIGINT, exiting
Thu Jan  1 00:07:50 flag_hoa: set HoA 3ffe:0:0:2:0:0:0:2/128 iif 5
flags 80 preferred_time 4294967295 valid_time 4294967295
Thu Jan  1 00:07:50 __tunnel_del: tunnel ip6tnl1 (5) from
3ffe:0:0:2:0:0:0:2 to 3ffe:0:0:2:0:0:0:1 user count decreased to 0
Thu Jan  1 00:07:51 __tunnel_del: tunnel deleted
Thu Jan  1 00:07:51 xfrm_mn_cleanup: Deleting policies and states for MN
Thu Jan  1 00:07:51 xfrm_cn_cleanup: Deleting policies and states for CN
mip6d[855]: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 stopped (Mobile Node)



Then, I added this in md_change_default_router
       MDBG("have entered change default router\n");
	MDBG("if = %d  \n", !tsisset(new->lifetime)));

and the note book could print out this
Thu May 14 16:13:46 md_change_default_router: have entered change default router
Thu May 14 16:13:46 md_change_default_router: if = 0
before the message "md_change_default_router: add new router
fe80:0:0:0:211:5bff:fe2f:5cb7 on interface eth1 (4)" above