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/* ----------------------------------------------------------------------- *
*
* Copyright 2010-2011 Gene Cumm - All Rights Reserved
*
* Portions from chain.c:
* Copyright 2003-2009 H. Peter Anvin - All Rights Reserved
* Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
* Significant portions copyright (C) 2010 Shao Miller
* [partition iteration, GPT, "fs"]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* prdhcp.c
*
* Print the contents of the 3 DHCP packets
*/
#include <stdio.h>
#include <stdlib.h>
#include <consoles.h>
#include <console.h>
#include <errno.h>
#include <string.h>
#include <syslinux/config.h>
#include <syslinux/loadfile.h>
#include <syslinux/bootrm.h>
#include <syslinux/video.h>
#include <com32.h>
#include <stdint.h>
#include <syslinux/pxe.h>
#include <sys/gpxe.h>
#include <unistd.h>
#include <getkey.h>
#define DEBUG 0
#define dprintf0(f, ...) ((void)0)
#ifdef DEBUG
# define dpressanykey pressanykey
# define dprintf printf
# define dprint_pxe_bootp_t print_pxe_bootp_t
# define dprint_pxe_vendor_blk print_pxe_vendor_blk
# define dprint_pxe_vendor_raw print_pxe_vendor_raw
#else
# define dpressanykey(void) ((void)0)
# define dprintf(f, ...) ((void)0)
# define dprint_pxe_bootp_t(p, l) ((void)0)
# define dprint_pxe_vendor_blk(p, l) ((void)0)
# define dprint_pxe_vendor_raw(p, l) ((void)0)
#endif
#define dprintf_opt_cp dprintf0
#define dprintf_opt_inj dprintf
const char app_name_str[] = "prdhcp.c32";
int pressanykey(void) {
int inc;
printf("Press any key to continue. ");
inc = KEY_NONE;
while (inc == KEY_NONE)
inc = get_key(stdin, 6000);
puts("");
return inc;
}
void print_pxe_vendor_blk(pxe_bootp_t *p, size_t len)
{
int i, vlen, oplen, j;
uint8_t *d;
uint32_t magic;
if (!p) {
printf(" packet pointer is null\n");
return;
}
vlen = len - ((void *)&(p->vendor) - (void *)p);
printf(" Vendor Data: Len=%d", vlen);
d = p->vendor.d;
/* Print only 256 characters of the vendor/option data */
/*
print_pxe_vendor_raw(p, (len - vlen) + 256);
vlen = 0;
*/
magic = ntohl(*((uint32_t *)d));
printf(" Magic: %08X", ntohl(*((uint32_t *)d)));
if (magic != VM_RFC1048) /* Invalid DHCP packet */
vlen = 0;
for (i = 4; i < vlen; i++) {
if (d[i]) /* Skip the padding */
printf("\n @%03X-%3d", i, d[i]);
if (d[i] == 255) /* End of list */
break;
if (d[i]) {
oplen = d[++i];
printf(" l=%3d:", oplen);
for (j = (++i + oplen); i < vlen && i < j; i++) {
printf(" %02X", d[i]);
}
i--;
}
}
printf("\n");
}
void print_pxe_bootp_t(pxe_bootp_t *p, size_t len)
{
if (!p) {
printf(" packet pointer is null\n");
return;
}
printf(" op:%02X hw:%02X hl:%02X gh:%02X id:%08X se:%04X f:%04X"
" cip:%08X\n", p->opcode, p->Hardware, p->Hardlen, p->Gatehops,
ntohl(p->ident), ntohs(p->seconds), ntohs(p->Flags), ntohl(p->cip));
printf(" yip:%08X sip:%08X gip:%08X",
ntohl(p->yip), ntohl(p->sip), ntohl(p->gip));
printf(" caddr-%02X:%02X:%02X:%02X:%02X:%02X\n", p->CAddr[0],
p->CAddr[1], p->CAddr[2], p->CAddr[3], p->CAddr[4], p->CAddr[5]);
printf(" sName: '%s'\n", p->Sname);
printf(" bootfile: '%s'\n", p->bootfile);
print_pxe_vendor_blk(p, len);
}
void print_dhcp_pkt_all(void)
{
pxe_bootp_t *p;
size_t len;
int i;
int ptype[3] = {PXENV_PACKET_TYPE_DHCP_DISCOVER, PXENV_PACKET_TYPE_DHCP_ACK, PXENV_PACKET_TYPE_CACHED_REPLY};
for (i = 0; i < 3; i++) {
if (!pxe_get_cached_info(ptype[i],
(void **)&(p), &(len))) {
dprintf("Got packet #%d/%d\n", (i + 1), ptype[i]);
print_pxe_bootp_t(p, len);
pressanykey();
}
}
}
int main(void)
{
int rv= -1;
const struct syslinux_version *sv;
console_ansi_raw();
sv = syslinux_version();
if (sv->filesystem != SYSLINUX_FS_PXELINUX) {
printf("%s: May only run in PXELINUX\n", app_name_str);
return -2;
}
print_dhcp_pkt_all();
return rv;
}
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