Date: Tue, 6 May 2014 08:40:22 -0700 From: Doug Ambrisko <ambrisko@ambrisko.com> To: amine tay <amine.tay91@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: vm+ipxe+pxeboot fail Message-ID: <20140506154021.GA53537@ambrisko.com> In-Reply-To: <CAMMGsZKLkXPJAyuoiNoRo3DQEOgzMps-D7-iTThz8ARPyjZXTg@mail.gmail.com> References: <CAMMGsZKLkXPJAyuoiNoRo3DQEOgzMps-D7-iTThz8ARPyjZXTg@mail.gmail.com>
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--wac7ysb48OaltWcw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Apr 30, 2014 at 10:10:07AM +0200, amine tay wrote: | Hi everyone, | | Lately I had some problems, trying to get FreeBSD to PXE boot. (Actually | I'm using a VMware virtual machine.) First I'm using iPXE 1.0.0 and then | load and launch the FreeBSD pxeboot | <http://man.freebsd.org/pxeboot>loader. But I'm getting this : | http://forums.freebsd.org/viewtopic.php?f=4&t=45901 | When using isc-dhcp as DHCP server I'm getting the error but when using | dnsmasq everything works fine. | | The problem seems that the client when booting is sending 2 DHCP requests | and therefore gets two different IP addresses, the first one sent by the | ROM and the second one by the FreeBSD | pxeboot<http://man.freebsd.org/pxeboot>loader. | | I found somewhere in some posts that the pxe.c file is doing a second | bootprequest because it fails to get cached DHCP data from the ROM. | | Any help or more ideas would be appreciated. If you do a dump on the packets you can probably see the iPXE is sending a client ID and the pxeboot isn't. So then ISC DHCP server doesn't like that and gives a different IP. Then things don't match up anymore. This is a patch to fix libstand for iPXE but then seems to break HW PXE. However, I'm finding with some new eval. HW, PXE is starting to fail on something else. Index: bootp.c =================================================================== --- bootp.c (revision 255868) +++ bootp.c (working copy) @@ -146,8 +146,12 @@ if (flag & BOOTP_PXE) { bp->bp_vend[7] = TAG_CLASSID; bp->bp_vend[8] = 9; - bcopy("PXEClient", &bp->bp_vend[9], 9); - bp->bp_vend[18] = TAG_END; + bcopy(bp->bp_chaddr, &bp->bp_vend[9], 9); + bp->bp_vend[18] = TAG_CLIENTID; + bp->bp_vend[19] = 7; /* type and length */ + bp->bp_vend[20] = 1; /* MAC */ + bcopy(d->myea, &bp->bp_vend[21], 6); + bp->bp_vend[27] = TAG_END; } else bp->bp_vend[7] = TAG_END; #else @@ -190,7 +194,11 @@ bp->bp_vend[25] = TAG_CLASSID; bp->bp_vend[26] = 9; bcopy("PXEClient", &bp->bp_vend[27], 9); - bp->bp_vend[36] = TAG_END; + bp->bp_vend[36] = TAG_CLIENTID; + bp->bp_vend[37] = 7; /* type and length */ + bp->bp_vend[38] = 1; /* MAC */ + bcopy(d->myea, &bp->bp_vend[39], 6); + bp->bp_vend[45] = TAG_END; } else bp->bp_vend[25] = TAG_END; You'll need to rebuild libstand.a, rebuild pxeboot with the new libstand.a. I haven't figure out how to determine if it needs it or not. I ran into this when trying to PXE boot in VirtualBox and QEMU. There might be an option in dhcpd.conf to disable this check for client ID. Thanks, Doug A. --wac7ysb48OaltWcw Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="pxe_clientid.patch" Index: bootp.c =================================================================== --- bootp.c (revision 255868) +++ bootp.c (working copy) @@ -146,8 +146,12 @@ if (flag & BOOTP_PXE) { bp->bp_vend[7] = TAG_CLASSID; bp->bp_vend[8] = 9; - bcopy("PXEClient", &bp->bp_vend[9], 9); - bp->bp_vend[18] = TAG_END; + bcopy(bp->bp_chaddr, &bp->bp_vend[9], 9); + bp->bp_vend[18] = TAG_CLIENTID; + bp->bp_vend[19] = 7; /* type and length */ + bp->bp_vend[20] = 1; /* MAC */ + bcopy(d->myea, &bp->bp_vend[21], 6); + bp->bp_vend[27] = TAG_END; } else bp->bp_vend[7] = TAG_END; #else @@ -190,7 +194,11 @@ bp->bp_vend[25] = TAG_CLASSID; bp->bp_vend[26] = 9; bcopy("PXEClient", &bp->bp_vend[27], 9); - bp->bp_vend[36] = TAG_END; + bp->bp_vend[36] = TAG_CLIENTID; + bp->bp_vend[37] = 7; /* type and length */ + bp->bp_vend[38] = 1; /* MAC */ + bcopy(d->myea, &bp->bp_vend[39], 6); + bp->bp_vend[45] = TAG_END; } else bp->bp_vend[25] = TAG_END; --wac7ysb48OaltWcw--
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