Change Details

When a dynamic prefix is delegated, dhcp6c use invalid pltime and vltime : dhcp6c log extract: ``` dhcp6_get_options: get DHCP option IA_PD, len 54 IA_PD: ID=0, T1=86400, T2=138240 copyin_option: get DHCP option IA_PD prefix, len 25 copyin_option: IA_PD prefix: 2001:xxx:xxxx:xxxx::/56 pltime=172800 vltime=259200 copyin_option: get DHCP option status code, len 9 status code: success ... update_prefix: create a prefix 2001:xxx:xxxx:xxxx::/56 pltime=94613834736384, vltime=94613834822784 ``` Thus it cannot renew the prefix (or even renew/rebind the lease) upon lease timeout. Also, regarding pltime and vltime, dhcp6c should honor the exact value of `T1` and `T2` (not x2 nor 94218697831552, witch seems to be a u32 overflow) according to the RFC 84115: https://www.rfc-editor.org/rfc/rfc8415#section-6.3:~:text=7.7.%20%20Representation%20of%20Time%20Values%20and%20%22Infinity%22%20as%20a%20Time%20Value `pltime` and `vltime` are not updated radvd side either.

When a dynamic prefix is delegated, dhcp6c use invalid pltime and vltime : dhcp6c log extract: ``` dhcp6_get_options: get DHCP option IA_PD, len 54 IA_PD: ID=0, T1=86400, T2=138240 copyin_option: get DHCP option IA_PD prefix, len 25 copyin_option: IA_PD prefix: 2001:xxx:xxxx:xxxx::/56 pltime=172800 vltime=259200 copyin_option: get DHCP option status code, len 9 status code: success ... update_prefix: create a prefix 2001:xxx:xxxx:xxxx::/56 pltime=94613834736384, vltime=94613834822784 ``` Thus it cannot renew the prefix (or even renew/rebind the lease) upon lease timeout. Also, regarding pltime and vltime, dhcp6c should honor the exact value of `T1` and `T2` (not `T1` x 2 nor 94218697831552, witch seems to be a u32 overflow) according to the RFC 84115: https://www.rfc-editor.org/rfc/rfc8415#section-6.3:~:text=7.7.%20%20Representation%20of%20Time%20Values%20and%20%22Infinity%22%20as%20a%20Time%20Value `pltime` and `vltime` are not updated radvd side either.

When a dynamic prefix is delegated, dhcp6c use invalid pltime and vltime : dhcp6c log extract: ``` dhcp6_get_options: get DHCP option IA_PD, len 54 IA_PD: ID=0, T1=86400, T2=138240 copyin_option: get DHCP option IA_PD prefix, len 25 copyin_option: IA_PD prefix: 2001:xxx:xxxx:xxxx::/56 pltime=172800 vltime=259200 copyin_option: get DHCP option status code, len 9 status code: success ... update_prefix: create a prefix 2001:xxx:xxxx:xxxx::/56 pltime=94613834736384, vltime=94613834822784 ``` Thus it cannot renew the prefix (or even renew/rebind the lease) upon lease timeout. Also, regarding pltime and vltime, dhcp6c should honor the exact value of `T1` and `T2` (not x`T1` x 2 nor 94218697831552, witch seems to be a u32 overflow) according to the RFC 84115: https://www.rfc-editor.org/rfc/rfc8415#section-6.3:~:text=7.7.%20%20Representation%20of%20Time%20Values%20and%20%22Infinity%22%20as%20a%20Time%20Value `pltime` and `vltime` are not updated radvd side either.