On 20/05/2015 01:04 πμ, Simon Kelley wrote:
I just pushed a patch into git
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=7f8565b94ca52dde31f7688a9f9a0cc611d9dae3
Please could you see if that helps? It should apply to the Ubuntu 14.04
version, if that's easier.
Hi Simon,
I tested against the git head version.
It did fix the boot server's IP, i.e. the client now tried to download
pxelinux.0 from the correct IP=10.161.254.11.
Unfortunately it seems like it also broke PXE booting completely.
Completely, as in, now the client won't boot either with or without
#dhcp-range=tag:efi,192.168.68.20,192.168.68.250,8h
The client now reports (after getting the IP, and at the point where
it's supposed to download pxelinux.0):
UD 10.161.254.11....|
PXE-E78 - Could not locate boot server
And aborts PXE boot.
I'm attaching two packets which might help a bit if you compare them.
The first is the last packet from 4011 in the successful case, i.e.
without any patches at all, and with the "#dhcp-range=192.168.68.20..."
line commented out. I'm guessing that what we want is to send the same
packet even when that dhcp-range isn't commented out.
06:54:45.724239 c0:4a:00:02:bc:1e > 3c:07:71:a2:02:e3, ethertype IPv4
(0x0800), length 342: (tos 0xc0, ttl 64, id 800, offset 0, flags [none],
proto UDP (17), length 328)
10.161.254.11.4011 > 10.161.254.149.4011: [udp sum ok] UDP, length 300
0x0000: 3c07 71a2 02e3 c04a 0002 bc1e 0800 45c0 <.q....J......E.
0x0010: 0148 0320 0000 4011 63e2 0aa1 fe0b 0aa1 .H....@.c.......
0x0020: fe95 0fab 0fab 0134 7345 0201 0600 72a2 .......4sE....r.
0x0030: 02e3 0004 0000 0000 0000 0aa1 fe95 0aa1 ................
0x0040: fe0b 0000 0000 3c07 71a2 02e3 0000 0000 ......<.q.......
0x0050: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0060: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0070: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0080: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0090: 0000 0000 0000 6c74 7370 2f69 3338 362f ......ltsp/i386/
0x00a0: 7078 656c 696e 7578 2e30 0000 0000 0000 pxelinux.0......
0x00b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0100: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0110: 0000 0000 0000 6382 5363 3501 0536 040a ......c.Sc5..6..
0x0120: a1fe 0b3c 0950 5845 436c 6965 6e74 6111 ...<.PXEClienta.
0x0130: 0050 48dc b1ba 8ae2 11a0 0d3c 0771 a202 .PH........<.q..
0x0140: e32b 0747 0480 0000 00ff ff00 0000 0000 .+.G............
0x0150: 0000 0000 0000 ......
The second is the last packet from 4011 with the latest patch applied
and with the "dhcp-range=192.168.68.20..." in effect. Now tt's a lot
longer than the successful one:
07:00:57.059681 3c:07:71:a2:02:e3 > c0:4a:00:02:bc:1e, ethertype IPv4
(0x0800), length 590: (tos 0x0, ttl 20, id 5, offset 0, flags [none],
proto UDP (17), length 576)
10.161.254.149.4011 > 10.161.254.11.4011: [udp sum ok] UDP, length 548
0x0000: c04a 0002 bc1e 3c07 71a2 02e3 0800 4500 .J....<.q.....E.
0x0010: 0240 0005 0000 1411 92c5 0aa1 fe95 0aa1 .@..............
0x0020: fe0b 0fab 0fab 022c 41c4 0101 0600 72a2 .......,A.....r.
0x0030: 02e3 000a 0000 0aa1 fe95 0000 0000 0000 ................
0x0040: 0000 0000 0000 3c07 71a2 02e3 0000 0000 ......<.q.......
0x0050: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0060: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0070: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0080: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0090: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0100: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0110: 0000 0000 0000 6382 5363 3501 0337 2401 ......c.Sc5..7$.
0x0120: 0203 0405 060b 0c0d 0f10 1112 1617 1c28 ...............(
0x0130: 292a 2b32 3336 3a3b 3c42 4380 8182 8384 )*+236:;<BC.....
0x0140: 8586 8739 0204 ec61 1100 5048 dcb1 ba8a ...9...a..PH....
0x0150: e211 a00d 3c07 71a2 02e3 5d02 0000 5e03 ....<.q...]...^.
0x0160: 0102 013c 2050 5845 436c 6965 6e74 3a41 ...<.PXEClient:A
0x0170: 7263 683a 3030 3030 303a 554e 4449 3a30 rch:00000:UNDI:0
0x0180: 3032 3030 312b 0747 0480 0000 00ff ff00 02001+.G........
0x0190: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x01f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0200: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0210: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0220: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0230: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0240: 0000 0000 0000 0000 0000 0000 0000 ..............
Again sorry for not having found some way to decode those packets.
Cheers,
Alkis
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