2020-08-01 11:38:41 +02:00
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@startuml
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2020-08-21 15:19:53 +02:00
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title currentHost DHCPv4 (Kea 1.8.0)
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2020-08-01 11:38:41 +02:00
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agent "Subnet Selection" as entry
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agent "Set subnet to the selected subnet" as setSelected
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agent "Has client a lease for its client id?" as clientid_lookup
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agent "Iterate on allowed subnets for client id" as clientid_iterate
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agent "Set subnet to the by client id lease" as found_clientid
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agent "Has client a matching lease?" as hwaddr_lookup
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agent "Iterate on allowed subnets for hardware address" as hwaddr_iterate
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agent "Set subnet to the matching lease" as found_hwaddr
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agent "Has an address reservation?" as hasAddressReservation
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agent "Set subnet to address reservation subnet" as setAddressReservation
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2020-08-01 13:24:06 +02:00
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agent "Is the address in an allowed pool?" as pool
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agent "Iterate on allowed subnets with pool" as pool_iterate
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agent "Set subnet to address pool subnet" as inAllowedPool
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2020-08-01 13:37:30 +02:00
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agent "Allocate a new lease" as allocate
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agent "Iterate on allowed subnets" as allocate_iterate
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agent "Set subnet to allocated lease subnet" as allocated
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2020-08-01 11:38:41 +02:00
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agent "Get subnet host reservation mode" as getHRmode
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agent "Is subnet host reservation mode global?" as checkHRmode
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agent "Get global host reservation" as global
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agent "Get subnet host reservation" as bySubnet
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agent "Return current host reservation" as return
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entry --> setSelected
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setSelected --> clientid_lookup
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clientid_lookup ---> hwaddr_lookup : no client id option
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clientid_lookup --> clientid_iterate
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clientid_iterate -> clientid_iterate : match-client-id is false or no lease
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clientid_iterate --> found_clientid : found a lease
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found_clientid ----> hasAddressReservation
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clientid_iterate --> hwaddr_lookup : not found by client id, try by hardware address
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hwaddr_lookup ---> hasAddressReservation : no hardware address
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hwaddr_lookup --> hwaddr_iterate
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hwaddr_iterate -> hwaddr_iterate : no lease or client id mismatch
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hwaddr_iterate --> found_hwaddr : found a lease
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found_hwaddr ----> hasAddressReservation
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hwaddr_iterate --> hasAddressReservation : not found
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hasAddressReservation --> setAddressReservation : yes
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2020-08-01 13:37:30 +02:00
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hasAddressReservation --> pool : no or not check in the taken branch
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2020-08-01 13:24:06 +02:00
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setAddressReservation --> pool
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pool --> pool_iterate
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2020-08-01 13:37:30 +02:00
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pool ---> allocate : pool check is not in all branches
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2020-08-01 13:24:06 +02:00
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pool_iterate -> pool_iterate : address not in an allowed pool
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pool_iterate --> inAllowedPool : address in an allowed pool
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2020-08-01 13:37:30 +02:00
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pool_iterate ---> allocate : no allowed pool
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inAllowedPool --> allocate
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allocate --> allocate_iterate : start from preferred (last used) subnet
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allocate ---> getHRmode : allocation is not in all branches
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allocate_iterate -> allocate_iterate : no free address
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allocate_iterate --> allocated : found a free address
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allocated --> getHRmode
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2020-08-01 11:38:41 +02:00
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getHRmode --> checkHRmode
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checkHRmode --> global : yes
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checkHRmode --> bySubnet : no
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global --> return : return global host reservation
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bySubnet --> return : return subnet host reservation
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2020-08-01 13:37:30 +02:00
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footer Only the initial lookup is always performed: other occasions to change the subnet so the current host are only in some branches
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2020-08-01 11:38:41 +02:00
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@enduml
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