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Read DHCP packet into aligned buffer and pass it as a struct pointer instead of a character buffer.

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This commit is contained in:
Ted Lemon 1998-06-25 02:55:16 +00:00
parent 52cdb300e7
commit ca0e3669b8
1 changed files with 11 additions and 8 deletions
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15
common/dispatch.c
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@ -42,7 +42,7 @@
#ifndef lint
static char copyright[] =
"$Id: dispatch.c,v 1.49 1998/04/09 04:30:00 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
"$Id: dispatch.c,v 1.50 1998/06/25 02:55:16 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
@ -54,7 +54,7 @@ struct timeout *timeouts;
static struct timeout *free_timeouts;
static int interfaces_invalidated;
void (*bootp_packet_handler) PROTO ((struct interface_info *,
unsigned char *, int, unsigned int,
struct dhcp_packet *, int, unsigned int,
struct iaddr, struct hardware *));
static void got_one PROTO ((struct protocol *));
@ -577,13 +577,16 @@ static void got_one (l)
struct hardware hfrom;
struct iaddr ifrom;
int result;
static unsigned char packbuf [4095]; /* Packet input buffer.
union {
unsigned char packbuf [4095]; /* Packet input buffer.
Must be as large as largest
possible MTU. */
struct dhcp_packet packet;
} u;
struct interface_info *ip = l -> local;
if ((result = receive_packet (ip, packbuf, sizeof packbuf,
&from, &hfrom)) < 0) {
if ((result =
receive_packet (ip, u.packbuf, sizeof u, &from, &hfrom)) < 0) {
warn ("receive_packet failed on %s: %m", ip -> name);
return;
}
@ -594,7 +597,7 @@ static void got_one (l)
ifrom.len = 4;
memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
(*bootp_packet_handler) (ip, packbuf, result,
(*bootp_packet_handler) (ip, &u.packet, result,
from.sin_port, ifrom, &hfrom);
}
}