static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len){
Bootp_t *bp = (Bootp_t *) pkt;
int retval = 0;
if(dest != PORT_BOOTPC || src != PORT_BOOTPS){
retval = -1;
} else if(len < sizeof (Bootp_t) - OPT_SIZE){
retval = -2;
} else if(bp->bp_op != OP_BOOTREQUEST &&
bp->bp_op != OP_BOOTREPLY &&
bp->bp_op != DHCP_OFFER &&
bp->bp_op != DHCP_ACK &&
bp->bp_op != DHCP_NAK){
retval = -3;
} else if(bp->bp_htype != HWT_ETHER){
retval = -4;
} else if(bp->bp_hlen != HWL_ETHER){
retval = -5;
} else if(NetReadLong((ulong*)&bp->bp_id) != BootpID){
retval = -6;
}
#ifdef DEBUG
printf("Filtering pkt = %d\n", retval);
#endif
return(retval);
}
static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len)
{
struct Bootp_t *bp = (struct Bootp_t *) pkt;
int retval = 0;
if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
retval = -1;
else if (len < sizeof(struct Bootp_t) - OPT_FIELD_SIZE)
retval = -2;
else if (bp->bp_op != OP_BOOTREQUEST &&
bp->bp_op != OP_BOOTREPLY &&
bp->bp_op != DHCP_OFFER &&
bp->bp_op != DHCP_ACK &&
bp->bp_op != DHCP_NAK)
retval = -3;
else if (bp->bp_htype != HWT_ETHER)
retval = -4;
else if (bp->bp_hlen != HWL_ETHER)
retval = -5;
else if (!bootp_match_id(NetReadLong((uint *)&bp->bp_id)))
retval = -6;
debug("Filtering pkt = %d\n", retval);
return retval;
}
/*
* Handle a BOOTP received packet.
*/
static void
BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
unsigned len)
{
struct Bootp_t *bp;
debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
src, dest, len, sizeof(struct Bootp_t));
bp = (struct Bootp_t *)pkt;
/* Filter out pkts we don't want */
if (BootpCheckPkt(pkt, dest, src, len))
return;
/*
* Got a good BOOTP reply. Copy the data into our variables.
*/
#ifdef CONFIG_STATUS_LED
status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
#endif
BootpCopyNetParams(bp); /* Store net parameters from reply */
/* Retrieve extended information (we must parse the vendor area) */
if (NetReadLong((uint *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
NetSetTimeout(0, (thand_f *)0);
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
debug("Got good BOOTP\n");
net_auto_load();
}
/*
* Handle a BOOTP received packet.
*/
static void
BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
Bootp_t *bp;
char *s;
debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
src, dest, len, sizeof (Bootp_t));
bp = (Bootp_t *)pkt;
if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
return;
/*
* Got a good BOOTP reply. Copy the data into our variables.
*/
#ifdef CONFIG_STATUS_LED
status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
#endif
BootpCopyNetParams(bp); /* Store net parameters from reply */
/* Retrieve extended information (we must parse the vendor area) */
if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
NetSetTimeout(0, (thand_f *)0);
debug("Got good BOOTP\n");
if ((s = getenv("autoload")) != NULL) {
if (*s == 'n') {
/*
* Just use BOOTP to configure system;
* Do not use TFTP to load the bootfile.
*/
NetState = NETLOOP_SUCCESS;
return;
#if defined(CONFIG_CMD_NFS)
} else if (strcmp(s, "NFS") == 0) {
/*
* Use NFS to load the bootfile.
*/
NfsStart();
return;
#endif
}
}
struct NetTask tftp_task;
BootpDeriveTaskTftp(&tftp_task, bp);
TftpStart(&tftp_task);
}
