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HenriWahl / dhcpy6d

MAC address aware DHCPv6 server written in Python
https://dhcpy6d.de
GNU General Public License v2.0
96 stars 27 forks source link

how to use prefix in the latest version? #30

Closed wugsh closed 4 years ago

wugsh commented 4 years ago

I use dhcpy6d.conf :

[address_default] category = random pattern = 5555:aaaa::$random64$

[prefix_default] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_defult] advertise = address prefixes

client get IPv6 address is "5555:aaaa::fbd6:409c:2202:80d/128 Scope:Global", the prefix does not take effect. I want to know how to use prefix for unknow client ?

HenriWahl commented 4 years ago

Hi, prefixes are used for prefix delegation - do you maybe mix it with addresses? Apparently your client requested an address which it got, using your random scheme.

HenriWahl commented 4 years ago

Ah, you have a typo there... "class_defult".

wugsh commented 4 years ago

I use dhcpy6d.conf : [address_default] category = random pattern = 5555:aaaa::$random64$

[prefixes_default] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_default] advertise = prefixes

the dhcpy6d.log print "2020-06-07 18:40:39,903 dhcpy6d WARNING REPLY | no addresses or prefixes available | transaction: 409108 | client_llip: fe80:0000:0000:0000:d5c4:4fb2:f20b:65be ", client can not get IPv6 addresss. I want use prefix assign IPv6 address.

HenriWahl commented 4 years ago

So you need "advertise = addresses prefixes"

wugsh commented 4 years ago

I use "advertise = addresses prefixes", the dhcpy6d.log print the same log.

HenriWahl commented 4 years ago

Strange... can you send your complete config so I can check it?

wugsh commented 4 years ago

My dhcpy6d.conf is: [dhcpy6d]

really_do_it = yes

interface = enp3s0

Some server DUID. serverduid = 0001000134824528134567366222

log = yes log_console = no log_file = /etc/dhcpy6d.log

valid_lifetime = 7200 server_preference = 255 store_config = mysql store_volatile = mysql store_db_host = 127.0.0.1

store_mysql_port = 3306

store_db_db = dhcpy6d store_db_user = root store_db_password = 123456

[address_default] category = random pattern = 5555:aaaa::$random64$

[prefixes_default] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_default] advertise = addresses prefixes

[class_fixed_address]

HenriWahl commented 4 years ago

Another typo... you need [prefix_default] instead of [prefixes_default].

wugsh commented 4 years ago

[dhcpy6d]

really_do_it = yes

interface = enp3s0

Some server DUID. serverduid = 0001000134824528134567366222

log = yes log_console = no log_file = /etc/dhcpy6d.log

valid_lifetime = 7200 server_preference = 255 store_config = mysql store_volatile = mysql store_db_host = 127.0.0.1

store_mysql_port = 3306

store_db_db = dhcpy6d store_db_user = root store_db_password = 123456

[address_default] category = random pattern = 5555:aaaa::$random64$

[prefix_default] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_default] advertise = addresses prefixes

[class_fixed_address]

the dhcpy6d.log print the same log. “798 dhcpy6d WARNING REPLY | no addresses or prefixes available | transaction: 29a60c | client_llip: fe80:0000:0000:0000:d5c4:4fb2:f20b:65be”

wugsh commented 4 years ago

Could you give me an example dhcpy6d.conf , I want use prefix assign IPv6 address, instead of "address_default" assign IPv6 address for unknow client . Thanks!

HenriWahl commented 4 years ago

How would you identify your clients? By MAC or hostname or DUID?

wugsh commented 4 years ago

By MAC

HenriWahl commented 4 years ago

So for example if you define your clients in a file you need an extra entry in the [dhcpy6d] section:

store_file_config = /path/to/dhcpy6d/clients.conf

In this file every section will define a client like described in https://github.com/HenriWahl/dhcpy6d/blob/master/doc/dhcpy6d-clients.conf.rst :

[client1] class=good-client mac=00:01:02:03:04:05

In your dhcpy6d.conf file you will have to define the appropriate prefix and class:

[prefix_client] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_good-client] advertise = prefixes prefixes = client

wugsh commented 4 years ago

If I do not know client's MAC, hostname or DUID, I want to use prefix assign IPv6 address for unknow client. Can this project achieve this function？

HenriWahl commented 4 years ago

Do you want to assign a prefix or an address? Both should be possible vie the [class_default].

wugsh commented 4 years ago

Like this ? [address_default] category = random pattern = 5555:aaaa::$random64$

[prefix_default] category = range range = 1000-2000 pattern = 5555:bbbb:$range$:: length = 64

[class_default] advertise = addresses prefixes

the dhcpy6d.log print the same log. “798 dhcpy6d WARNING REPLY | no addresses or prefixes available | transaction: 29a60c | client_llip: fe80:0000:0000:0000:d5c4:4fb2:f20b:65be”

HenriWahl commented 4 years ago

Give me some time, I will try this config.

HenriWahl commented 4 years ago

BTW - which version of dhcpy6d do you check on what platform?

HenriWahl commented 4 years ago

Even more interesting: what is the client you use? I found that for example dhcpcd in Linux uses MULTIPLE transaction IDs (one for SOLICIT and a different one for REQUEST) which causes exactly the effect you describe. The only cure is to enable rapid commit at the client so it only uses one transaction ID.

HenriWahl commented 4 years ago

OK, these are my results so far:

[dhcpy6d]
really_do_it = yes
interface = enp0s8
serverduid = 0001000134824528134567366121

store_volatile = mysql
store_db_host = 127.0.0.1
store_db_db = dhcpy6d
store_db_user = dhcpy6d
store_db_password = dhcpy6d

log = yes
log_console = yes
log_file = /dhcpy6d/dhcpy6d.log
log_mac_llip = yes
cache_mac_llip = yes

identification = mac

[address_default]
category = random
pattern = 5555:aaaa::$random64$

[prefix_default]
category = range
range = 1000-2000
pattern = 5555:bbbb:$range$::
length = 64

[class_default]
advertise = addresses prefixes
addresses = default
prefixes = default
nameserver = fd00::1
2020-06-08 23:08:47,301 dhcpy6d INFO SOLICIT | transaction: fdeaec | answer: normal | client_llip: fe80:0000:0000:0000:0a00:27ff:fea8:6b72 | counter: 1 | dns_s: 1 | duid: 000476e76286ac944ce59954b52dc15478c9 | fqdn: dhcpy6d-client1 | hostname: dhcpy6d-client1 | ia_options: [3, 25] | iaid: 0154eb16 | interface: enp0s8 | last_message_received_type: 1 | mac: 08:00:27:a8:6b:72 | options_request: [23, 24, 31, 39, 82, 83] | rapid_commit: True | vendor_class_data: dhcpcd-7.1.0:Linux-4.19.0-6-amd64:x86_64:GenuineIntel | vendor_class_en: 40712
2020-06-08 23:08:47,317 dhcpy6d INFO REPLY | transaction: fdeaec | options: [3, 7, 14, 23, 24, 25, 31, 39]  | addresses: 5555:aaaa:0000:0000:cb54:1237:562a:036a | client_class: default_enp0s8 | hostname: dhcpy6d-client1 | prefixes: 5555:bbbb:1000:0000:0000:0000:0000:0000/64
wugsh commented 4 years ago

I use version of dhcpy6d is github master branch with your config, server is ubuntu18.04 and client is ubuntu18.04/16.04. I use this shell (sudo dhclient -6 -d eth0) to get IPv6 address. the log does not include "prefixes: 5555:bbbb:1000:0000:0000:0000:0000:0000/64".

HenriWahl commented 4 years ago

You have to configure dhclient to ask for prefix which is option 25 - right now it asks only for address, option 3:

2020-06-09 21:16:52,478 dhcpy6d INFO SOLICIT | transaction: cebe08 | addresses: 5555:aaaa:0000:0000:9d8e:f47a:2777:07dd | answer: normal | client_llip: fe80:0000:0000:0000:d5c4:4fb2:f20b:65be | counter: 1 | duid: 00010001266e40a974d435eaad60 | ia_options: [3] | iaid: 35eaad60 | interface: enp3s0 | last_message_received_type: 1 | mac: 74:d4:35:ea:ad:60 | options_request: [23, 24, 39, 31]

wugsh commented 4 years ago

OK, I get the prefix, Thank you very much.

HenriWahl commented 4 years ago

Great! So I'll close this issue now.