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From: Ken Y. <ke...@nl...> - 2000-11-07 00:30:24
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>Finally I found the problem: >"/src/etherboot.h" sets the constant DHCP_OPT_LEN to 312 (=0x138). >This seems to be the maximal length for _all_ DHCP options together. >I set it to 512 and encountered no problems with my dhcpd.conf: >The bootmenu appeared with all entries. For larger dhcpd.confs >the value has to be increased further. > >But the contstant hasn´t been defined just for fun, >so what purpose does the constant have ? And where >can I find information about it (e.g. RFC)? Probably in the DHCP RFCs mentioned at the top of main.c. I think it's a relic of the bootp packet format. The problem is I'm not sure how it interacts with the field bootp_extension (see types bootp_t and bootpd_t) as there is a max limit for the whole packet (min(1500,sizeof(bootpd_t))). I suspect that for DHCP, the space used by bootp_extension should be allocated to DHCP_OPT instead, since AFAIK there is no mechanism analogous to bootp's extension file in DHCP. |
