[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Debian) Status: New = Incomplete ** Changed in: dhcp3 (Debian) Status: Incomplete = Confirmed -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Debian) Status: New = Incomplete ** Changed in: dhcp3 (Debian) Status: Incomplete = Confirmed -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Ubuntu) Assignee: (unassigned) = Chuck Short (zulcss) -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Ubuntu) Assignee: (unassigned) = Chuck Short (zulcss) -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
ok, so I found the problem. The pcap that wyatt earp attached
(excellent info, thanks wyatt) shows the same scenario I'm seeing at
home, where the DHCP server's DHCPACK message includes two (identical)
subnet mask options.
Now, I'm no DHCP expert, but RFC 2131, Page 23 says
Options may appear only once, unless otherwise specified in the options
document. The client concatenates the values of multiple instances of the
same option into a single parameter list for configuration.
The subnet mask option documentation does not specify that it can occur
more than once, and tables.c (lines 101-102) show that dhclient only
expects a single value:
static struct option dhcp_options[] = {
{ subnet-mask, I, dhcp_universe, 1, 1 },
The problem ends up being that dhclient appends the second subnet-mask value to
the first, giving it a length of 8, rather than 4. So, dhcpack function calls
bind_lease function, which calls the script_write_params function.
The script_write_params function tries to find the network number using
the netmask acquired from DHCPACK message. At this point, netmask.iabuf
looks like this:
len
iabuf 0xbfffdf4c
iabuf[0]0xff
iabuf[1]0xff
iabuf[2]0xff
iabuf[3]0
iabuf[4]0xff
iabuf[5]0xff
iabuf[6]0xff
iabuf[7]0
script_write_params function calls subnet_number, which sees that the
netmask
So it would seem that the server is wrong in sending two subnet mask
options, but IMHO, dhclient could be more lenient in the case where the
two are identical. After all, other dhcp clients connecting to my
--
dhclient 3.0.6 refuses valid offer
https://bugs.launchpad.net/bugs/270010
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to dhcp3 in ubuntu.
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[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
ugh, accidentally posted that message in the middle of editing it. So, the subnet_number function sees an address of 4 bytes, but a netmask of 8 bytes and fails. Where I was headed is that I think dhclient should be modified to ignore duplicate options sent by the server. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
I think importance should be set high because this problem Has a severe impact on a small portion of Ubuntu users. Anyone with certain ISPs can't connect at all. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
ok, so I found the problem. The pcap that wyatt earp attached
(excellent info, thanks wyatt) shows the same scenario I'm seeing at
home, where the DHCP server's DHCPACK message includes two (identical)
subnet mask options.
Now, I'm no DHCP expert, but RFC 2131, Page 23 says
Options may appear only once, unless otherwise specified in the options
document. The client concatenates the values of multiple instances of the
same option into a single parameter list for configuration.
The subnet mask option documentation does not specify that it can occur
more than once, and tables.c (lines 101-102) show that dhclient only
expects a single value:
static struct option dhcp_options[] = {
{ subnet-mask, I, dhcp_universe, 1, 1 },
The problem ends up being that dhclient appends the second subnet-mask value to
the first, giving it a length of 8, rather than 4. So, dhcpack function calls
bind_lease function, which calls the script_write_params function.
The script_write_params function tries to find the network number using
the netmask acquired from DHCPACK message. At this point, netmask.iabuf
looks like this:
len
iabuf 0xbfffdf4c
iabuf[0]0xff
iabuf[1]0xff
iabuf[2]0xff
iabuf[3]0
iabuf[4]0xff
iabuf[5]0xff
iabuf[6]0xff
iabuf[7]0
script_write_params function calls subnet_number, which sees that the
netmask
So it would seem that the server is wrong in sending two subnet mask
options, but IMHO, dhclient could be more lenient in the case where the
two are identical. After all, other dhcp clients connecting to my
--
dhclient 3.0.6 refuses valid offer
https://bugs.launchpad.net/bugs/270010
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
ugh, accidentally posted that message in the middle of editing it. So, the subnet_number function sees an address of 4 bytes, but a netmask of 8 bytes and fails. Where I was headed is that I think dhclient should be modified to ignore duplicate options sent by the server. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
I think importance should be set high because this problem Has a severe impact on a small portion of Ubuntu users. Anyone with certain ISPs can't connect at all. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Ubuntu) Status: Incomplete = Confirmed -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Changed in: dhcp3 (Ubuntu) Status: Incomplete = Confirmed -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
I am having this issue as well with 9.10. Happens only at home connecting with my ISP. Works fine at the office. I am a programmer, and am willing to help debug this, but I don't know anything about dhclient. Please let me know how I can help. Meantime, I'll start digging myself. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
Sorry, just found the Helping With Bugs page on the Wiki. I'll get up to speed and start helping out with this one, since it's affecting me. Thanks. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
I am having this issue as well with 9.10. Happens only at home connecting with my ISP. Works fine at the office. I am a programmer, and am willing to help debug this, but I don't know anything about dhclient. Please let me know how I can help. Meantime, I'll start digging myself. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
Sorry, just found the Helping With Bugs page on the Wiki. I'll get up to speed and start helping out with this one, since it's affecting me. Thanks. -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
We'd like to figure out what's causing this bug for you, but we haven't heard back from you in a while. Could you please provide the requested information? Thanks! -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
We'd like to figure out what's causing this bug for you, but we haven't heard back from you in a while. Could you please provide the requested information? Thanks! -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue that you reported is one that should be reproducible with the live environment of the Desktop CD of the development release - Karmic Koala. It would help us greatly if you could test with it so we can work on getting it fixed in the next release of Ubuntu. You can find out more about the development release at http://www.ubuntu.com/testing/. Thanks again and we appreciate your help. ** Changed in: dhcp3 (Ubuntu) Importance: Undecided = Low ** Changed in: dhcp3 (Ubuntu) Status: New = Incomplete -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue that you reported is one that should be reproducible with the live environment of the Desktop CD of the development release - Karmic Koala. It would help us greatly if you could test with it so we can work on getting it fixed in the next release of Ubuntu. You can find out more about the development release at http://www.ubuntu.com/testing/. Thanks again and we appreciate your help. ** Changed in: dhcp3 (Ubuntu) Importance: Undecided = Low ** Changed in: dhcp3 (Ubuntu) Status: New = Incomplete -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Package changed: dhcp (Ubuntu) = dhcp3 (Ubuntu) ** Also affects: dhcp3 (Debian) Importance: Undecided Status: New -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Package changed: dhcp (Ubuntu) = dhcp3 (Ubuntu) ** Also affects: dhcp3 (Debian) Importance: Undecided Status: New -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 270010] Re: dhclient 3.0.6 refuses valid offer
** Attachment added: DHCP request packet capture http://launchpadlibrarian.net/17601790/dhcp-fail.pcap -- dhclient 3.0.6 refuses valid offer https://bugs.launchpad.net/bugs/270010 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
