Date: Fri, 29 Oct 1999 22:14:01 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: FreeBSD-hackers@freebsd.org (FreeBSD hackers list) Subject: bootpd on Alpha / alignment problems Message-ID: <199910292014.WAA31440@yedi.iaf.nl>
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On Alpha the bootpd does not work, it assert-fails on the
size of the struct bootp being != to BP_MINPKTSZ.
A bit of debugging reveals:
alpine#./bootpd -d9
sizeof struct bootp=312, BP_MINPKTSZ=300
bootpd: info(6): bootptab mtime: Fri Oct 29 20:10:09 1999
bootpd: info(6): reading "/etc/bootptab"
bootpd: info(6): read 1 entries (1 hosts) from "/etc/bootptab"
My best bet is that the Alpha alignment inside the struct results
in a bigger bootp struct. I am, however, not sure on what the right
way is to fix this.
Comments appreciated,
Wilko
=======
#define BP_MINPKTSZ 300 /* to check sizeof(struct bootp) */
struct bootp {
unsigned char bp_op; /* packet opcode type */
unsigned char bp_htype; /* hardware addr type */
unsigned char bp_hlen; /* hardware addr length */
unsigned char bp_hops; /* gateway hops */
unsigned int32 bp_xid; /* transaction ID */
unsigned short bp_secs; /* seconds since boot began
*/
unsigned short bp_flags; /* RFC1532 broadcast, etc.
*/
struct in_addr bp_ciaddr; /* client IP address */
struct in_addr bp_yiaddr; /* 'your' IP address */
struct in_addr bp_siaddr; /* server IP address */
struct in_addr bp_giaddr; /* gateway IP address */
unsigned char bp_chaddr[BP_CHADDR_LEN]; /* client hardware address
*/
char bp_sname[BP_SNAME_LEN]; /* server host name */
char bp_file[BP_FILE_LEN]; /* boot file name */
unsigned char bp_vend[BP_VEND_LEN]; /* vendor-specific area */
/* note that bp_vend can be longer, extending to end of packet. */
};
/*
--
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