From Brandon's Tinkerings
class "Apple-Intel-Netboot" {
# Limit this class to only Intel Apple machines
match if substring (option vendor-class-identifier, 0, 14) = "AAPLBSDPC/i386";
option dhcp-parameter-request-list 1,3,17,43,60; # Ask for these options from the client
if (option dhcp-message-type = 1) {
# On DHCPDiscover Message(s)
# Tell the client, via selected boot image (08:04:), which image we're preferring as default (81:00:00:89)
option vendor-class-identifier "AAPLBSDPC";
option vendor-encapsulated-options 08:04:81:00:00:89; # bsdp option 8 (length 04) -- selected image id;
} elsif (option dhcp-message-type = 8) {
# on DHCPInform Messages, Us/Our (Server), Them (Client)
option vendor-class-identifier "AAPLBSDPC"; # Let Them know we're responding with Apple BSDP Information
if (substring(option vendor-encapsulated-options, 0, 3) = 01:01:01) {
log(info, "BSDP_LIST");
# BSDP List
# Let Them know this is the let, what server, the server's priority, what Our default image is, and provide the image list
option vendor-encapsulated-options
01:01:01: # Start BSDP Inform/List Option 1 (01:), Length 1 (01:), Message Type List(1) (01:)
03:04: # BSDP option code 3 (length 04) -- Server Identifier
0A:00:03:02: # Server IP (10.0.3.2), Dec->Hex
04:02: # BSDP option code 4 (length 02) -- Server Priority
80:00: # Priority (32768) Dec->Hex
07:04: # BSDP option code 7 (length 04) -- Default Image ID
81:00:00:89: # Image ID - (137) Dec->Hex
#
# 81 breaks into: 0 or 8 for Non-Install (NetBoot) set or Install (NetInstal) set,
# Most, including DeployStudio default to NetInstall set.
# Then 0 for Mac OS 9, 1 for Mac OS X (Client)
# 2 for OS X Server, and 3 for Hardware Diagnostics
# 4- through 127 (x4:00-xf:ff) reversed for future use
# And the last two are for the Image ID (Dec->Hex)
# IDs 1-4095 (00:01-0F:FF) are for Server-Specific Images (You will probably want an ID in this range)
# IDs 4096-65535 (10:00-FF:FF) Are "Globally-Unique", Multiple servers can present this same ID
# and the client will only see one image, and pick a random(?) server to talk to.
#
09: # BSDP option code 9 -- Boot image list
2A: # Length - =5*<numofimages>+<sumofallimagenames>, eg =5*2+(23+9), =10+32, =42, Dec->Hex =2A
# This only appears once in the pacakge, no matter how many images you have below
81:00:00:89: # Image ID (137) -- dec->hex, see above (Default Image ID) for how to forumlate the full ID
09:44:6f:45:2d:49:6d:61:67:65: # Length(09):Name 'DoE-Image' ascii->hex
81:00:00:8A: # Image ID -- 138
17:44:53:52:2d:4e:42:30:31:30:31:32:30:31:32:2d:30:35:31:32:32:30:31:32; # Length(Hex:17,Dec:23):Name
#-- Name: DSR-NB01012012-05122012
} elsif (substring(option vendor-encapsulated-options, 0, 3) = 01:01:02) {
log(info, "BSDP_SELECT");
# BSDP Select, This is the client selecting which image they want to boot from
# Here we basically do if statements to catch what image is referenced
# Since we MIGHT be clustered, Check to see if we're the server being asked, this is BSDP Option 3 (Length 04)
if (substring(option vendor-encapsulated-options, 9, 4) = 0A:00:03:02) { # Match to IP: 10.0.3.2, same as above. You'll want to change this
log(info, "BSDP_SELECT-Responding, Client is talking to us."); # Log we're being talked to
if (substring(option vendor-encapsulated-options, 15, 4) = 81:00:00:89) { # Catch Image ID 81:00:00:89
log(info, "BSDP_SELECT-Image: 137:DOE-Image"); # This isn't _needed_, but is nice for debugging/knowing
# Insert stuff needed to boot here
filename "/ipxe.efi";
next-server 10.0.3.2;
option root-path = "http://boot.neltia.net/ipxe.efi";
} elsif (substring(option vendor-encapsulated-options, 15, 4) = 81:00:00:8A) { # Catch Image ID 81:00:00:8A
log(info, "BSDP_SELECT-Image: DSR-NB01012012-05122012");
# Insert stuff here needed for boot
filename "DSRBoot.img";
next-server 10.0.3.2;
option root-path = "http://osx-server.boot.neltia.net/DSRBoot.img";
} else {
log(info,"BSDP_SELECT-ERROR: Client responded with an image we don't have a match for! -- (Image added to list, but not in select catch?)");
} # End Image Selection Response
} else {
log(info,"BSDP_SELECT-Ignoring, Client is talking to another server--We're not worthy!"); # Log that we are not worthy of the client's time
} # End Server Check
} # End BSDP Options Check
} # End DHCPInform Messages
} # End Class
