Luigi Rizzo 7e8cc2bd03 Some libstand/bootp.c extension (written by Danny Braniss, slightly ... revised/modified by me) to store dhcp options into kenv variables, so the information is available to the boot loader and can be used to customize the boot process. The change is totally unintrusive, essentially made of a single function to be called while parsing a dhcp response, and a couple of tables to classify options. The values extracted from dhcp options are stored in the kenv environment in one of these forms: + options whose name and type is known are saved as dhcp.name = value (string, or number/ip addresses lists) + unknown options are assumed to be strings and saved as dhcp.option-NNN = "value" + options listed as '__INDIR' and sent on the wire as e.g. option unknown-252 "some.name=the actual value" are saved as some.name = "the actual value" + options listed as '__ILIST' and sent on the wire as e.g. option unknown-249 "a.b=foo bar; c.d= 123; e.f=done" are saved as multiple values a.b="foo bar" c.d="123" e.f="done" As you can see there is quite a bit of flexibility on what can be passed to the loader or the kernel. For the time being the vendor-specific table is mostly disabled, because there is no standard set of options for FreeBSD, and I don't know all the pxe-specific vendor options. Also, applications using libstand may live in memory-constrained environments, so it makes sense to keep these tables as small as possible, especially considering that one can generate arbitrary name=value pairs using site-specific options of type __INDIR or __ILIST (there are 4 __ILIST and 5 __INDIR in the table, numbered 246..249 and 250..254). Actually, considering that probably 75% of the standard dhcp options are totally useless, it might make sense to remove them as well. Submitted by: Danny Braniss MFC after: 4 weeks		2008-12-05 17:13:40 +00:00
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arm
i386
mips
powerpc
sparc64
__main.c
arp.c
assert.c
bcd.c
bootp.c	Some libstand/bootp.c extension (written by Danny Braniss, slightly	2008-12-05 17:13:40 +00:00
bootp.h
bootparam.c
bootparam.h
bswap.c
bzipfs.c
cd9660.c
close.c
closeall.c
dev.c
dosfs.c
dosfs.h
environment.c
ether.c
ext2fs.c
fstat.c
getopt.c
gets.c
globals.c
gzipfs.c
if_ether.h
in_cksum.c
inet_ntoa.c
ioctl.c
iodesc.h
libstand.3
lseek.c
Makefile	Let libstand(3) build on ARM.	2008-10-14 09:53:47 +00:00
net.c
net.h
netif.c
netif.h
nfs.c	use the correct variable in a debug message.	2008-11-21 09:14:29 +00:00
nfsv2.h
nullfs.c
open.c
pager.c
printf.c	Obey signedness flag in %z case.	2008-11-18 00:01:16 +00:00
qdivrem.c
quad.h
random.c
rarp.c
read.c
readdir.c
rpc.c
rpc.h
rpcv2.h
saioctl.h
sbrk.c
splitfs.c
stand.h	Eliminate dead declarations in libstand.	2008-11-06 16:30:32 +00:00
stat.c
strcasecmp.c
strdup.c
strerror.c
strtol.c
tftp.c
tftp.h
twiddle.c
udp.c
ufs.c
write.c
zalloc_defs.h
zalloc_malloc.c
zalloc_mem.h
zalloc_protos.h
zalloc.c