mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-24 19:08:50 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
949 lines
22 KiB
C
949 lines
22 KiB
C
/*
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* Based on LiMon - BOOTP.
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*
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* Copyright 1994, 1995, 2000 Neil Russell.
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* (See License)
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* Copyright 2000 Roland Borde
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* Copyright 2000 Paolo Scaffardi
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* Copyright 2000-2004 Wolfgang Denk, wd@denx.de
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*/
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#include <common.h>
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#include <command.h>
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#include <net.h>
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#include "bootp.h"
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#include "tftp.h"
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#include "nfs.h"
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#ifdef CONFIG_STATUS_LED
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#include <status_led.h>
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#endif
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#define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
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#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
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#ifndef CONFIG_NET_RETRY_COUNT
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# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
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#else
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# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
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#endif
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#define PORT_BOOTPS 67 /* BOOTP server UDP port */
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#define PORT_BOOTPC 68 /* BOOTP client UDP port */
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#ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
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#define CONFIG_DHCP_MIN_EXT_LEN 64
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#endif
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ulong BootpID;
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int BootpTry;
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#ifdef CONFIG_BOOTP_RANDOM_DELAY
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ulong seed1, seed2;
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#endif
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#if defined(CONFIG_CMD_DHCP)
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dhcp_state_t dhcp_state = INIT;
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unsigned long dhcp_leasetime = 0;
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IPaddr_t NetDHCPServerIP = 0;
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static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len);
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/* For Debug */
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#if 0
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static char *dhcpmsg2str(int type)
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{
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switch (type) {
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case 1: return "DHCPDISCOVER"; break;
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case 2: return "DHCPOFFER"; break;
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case 3: return "DHCPREQUEST"; break;
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case 4: return "DHCPDECLINE"; break;
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case 5: return "DHCPACK"; break;
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case 6: return "DHCPNACK"; break;
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case 7: return "DHCPRELEASE"; break;
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default: return "UNKNOWN/INVALID MSG TYPE"; break;
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}
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}
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#endif
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#if defined(CONFIG_BOOTP_VENDOREX)
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extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */
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extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */
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#endif
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#endif
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static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len)
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{
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Bootp_t *bp = (Bootp_t *) pkt;
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int retval = 0;
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if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
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retval = -1;
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else if (len < sizeof (Bootp_t) - OPT_SIZE)
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retval = -2;
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else if (bp->bp_op != OP_BOOTREQUEST &&
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bp->bp_op != OP_BOOTREPLY &&
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bp->bp_op != DHCP_OFFER &&
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bp->bp_op != DHCP_ACK &&
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bp->bp_op != DHCP_NAK ) {
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retval = -3;
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}
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else if (bp->bp_htype != HWT_ETHER)
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retval = -4;
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else if (bp->bp_hlen != HWL_ETHER)
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retval = -5;
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else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) {
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retval = -6;
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}
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debug("Filtering pkt = %d\n", retval);
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return retval;
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}
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/*
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* Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
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*/
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static void BootpCopyNetParams(Bootp_t *bp)
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{
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IPaddr_t tmp_ip;
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NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
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#if !defined(CONFIG_BOOTP_SERVERIP)
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NetCopyIP(&tmp_ip, &bp->bp_siaddr);
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if (tmp_ip != 0)
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NetCopyIP(&NetServerIP, &bp->bp_siaddr);
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memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6);
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#endif
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if (strlen(bp->bp_file) > 0)
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copy_filename (BootFile, bp->bp_file, sizeof(BootFile));
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debug("Bootfile: %s\n", BootFile);
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/* Propagate to environment:
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* don't delete exising entry when BOOTP / DHCP reply does
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* not contain a new value
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*/
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if (*BootFile) {
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setenv ("bootfile", BootFile);
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}
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}
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static int truncate_sz (const char *name, int maxlen, int curlen)
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{
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if (curlen >= maxlen) {
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printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
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name, curlen, maxlen);
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curlen = maxlen - 1;
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}
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return (curlen);
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}
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#if !defined(CONFIG_CMD_DHCP)
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static void BootpVendorFieldProcess (u8 * ext)
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{
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int size = *(ext + 1);
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debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
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*(ext + 1));
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NetBootFileSize = 0;
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switch (*ext) {
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/* Fixed length fields */
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case 1: /* Subnet mask */
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if (NetOurSubnetMask == 0)
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NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2));
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break;
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case 2: /* Time offset - Not yet supported */
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break;
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/* Variable length fields */
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case 3: /* Gateways list */
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if (NetOurGatewayIP == 0) {
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NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2));
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}
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break;
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case 4: /* Time server - Not yet supported */
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break;
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case 5: /* IEN-116 name server - Not yet supported */
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break;
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case 6:
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if (NetOurDNSIP == 0) {
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NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2));
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}
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#if defined(CONFIG_BOOTP_DNS2)
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if ((NetOurDNS2IP == 0) && (size > 4)) {
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NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4));
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}
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#endif
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break;
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case 7: /* Log server - Not yet supported */
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break;
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case 8: /* Cookie/Quote server - Not yet supported */
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break;
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case 9: /* LPR server - Not yet supported */
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break;
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case 10: /* Impress server - Not yet supported */
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break;
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case 11: /* RPL server - Not yet supported */
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break;
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case 12: /* Host name */
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if (NetOurHostName[0] == 0) {
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size = truncate_sz ("Host Name", sizeof (NetOurHostName), size);
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memcpy (&NetOurHostName, ext + 2, size);
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NetOurHostName[size] = 0;
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}
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break;
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case 13: /* Boot file size */
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if (size == 2)
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NetBootFileSize = ntohs (*(ushort *) (ext + 2));
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else if (size == 4)
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NetBootFileSize = ntohl (*(ulong *) (ext + 2));
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break;
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case 14: /* Merit dump file - Not yet supported */
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break;
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case 15: /* Domain name - Not yet supported */
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break;
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case 16: /* Swap server - Not yet supported */
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break;
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case 17: /* Root path */
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if (NetOurRootPath[0] == 0) {
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size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size);
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memcpy (&NetOurRootPath, ext + 2, size);
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NetOurRootPath[size] = 0;
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}
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break;
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case 18: /* Extension path - Not yet supported */
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/*
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* This can be used to send the information of the
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* vendor area in another file that the client can
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* access via TFTP.
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*/
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break;
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/* IP host layer fields */
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case 40: /* NIS Domain name */
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if (NetOurNISDomain[0] == 0) {
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size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size);
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memcpy (&NetOurNISDomain, ext + 2, size);
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NetOurNISDomain[size] = 0;
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}
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break;
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/* Application layer fields */
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case 43: /* Vendor specific info - Not yet supported */
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/*
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* Binary information to exchange specific
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* product information.
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*/
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break;
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/* Reserved (custom) fields (128..254) */
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}
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}
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static void BootpVendorProcess (u8 * ext, int size)
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{
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u8 *end = ext + size;
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debug("[BOOTP] Checking extension (%d bytes)...\n", size);
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while ((ext < end) && (*ext != 0xff)) {
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if (*ext == 0) {
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ext++;
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} else {
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u8 *opt = ext;
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ext += ext[1] + 2;
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if (ext <= end)
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BootpVendorFieldProcess (opt);
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}
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}
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debug("[BOOTP] Received fields: \n");
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if (NetOurSubnetMask)
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debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask);
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if (NetOurGatewayIP)
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debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP);
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if (NetBootFileSize)
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debug("NetBootFileSize : %d\n", NetBootFileSize);
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if (NetOurHostName[0])
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debug("NetOurHostName : %s\n", NetOurHostName);
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if (NetOurRootPath[0])
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debug("NetOurRootPath : %s\n", NetOurRootPath);
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if (NetOurNISDomain[0])
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debug("NetOurNISDomain : %s\n", NetOurNISDomain);
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if (NetBootFileSize)
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debug("NetBootFileSize: %d\n", NetBootFileSize);
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}
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/*
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* Handle a BOOTP received packet.
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*/
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static void
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BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
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{
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Bootp_t *bp;
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char *s;
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debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
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src, dest, len, sizeof (Bootp_t));
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bp = (Bootp_t *)pkt;
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if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
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return;
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/*
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* Got a good BOOTP reply. Copy the data into our variables.
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*/
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#ifdef CONFIG_STATUS_LED
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status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
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#endif
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BootpCopyNetParams(bp); /* Store net parameters from reply */
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/* Retrieve extended information (we must parse the vendor area) */
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if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
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BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
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NetSetTimeout(0, (thand_f *)0);
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debug("Got good BOOTP\n");
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if ((s = getenv("autoload")) != NULL) {
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if (*s == 'n') {
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/*
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* Just use BOOTP to configure system;
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* Do not use TFTP to load the bootfile.
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*/
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NetState = NETLOOP_SUCCESS;
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return;
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#if defined(CONFIG_CMD_NFS)
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} else if (strcmp(s, "NFS") == 0) {
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/*
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* Use NFS to load the bootfile.
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*/
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NfsStart();
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return;
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#endif
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}
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}
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TftpStart();
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}
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#endif
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/*
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* Timeout on BOOTP/DHCP request.
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*/
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static void
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BootpTimeout(void)
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{
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if (BootpTry >= TIMEOUT_COUNT) {
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puts ("\nRetry count exceeded; starting again\n");
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NetStartAgain ();
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} else {
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NetSetTimeout (TIMEOUT, BootpTimeout);
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BootpRequest ();
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}
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}
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/*
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* Initialize BOOTP extension fields in the request.
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*/
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#if defined(CONFIG_CMD_DHCP)
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static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP)
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{
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u8 *start = e;
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u8 *cnt;
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#if defined(CONFIG_BOOTP_VENDOREX)
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u8 *x;
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#endif
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#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
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char *hostname;
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#endif
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*e++ = 99; /* RFC1048 Magic Cookie */
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*e++ = 130;
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*e++ = 83;
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*e++ = 99;
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*e++ = 53; /* DHCP Message Type */
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*e++ = 1;
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*e++ = message_type;
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*e++ = 57; /* Maximum DHCP Message Size */
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*e++ = 2;
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*e++ = (576 - 312 + OPT_SIZE) >> 8;
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*e++ = (576 - 312 + OPT_SIZE) & 0xff;
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if (ServerID) {
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int tmp = ntohl (ServerID);
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*e++ = 54; /* ServerID */
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*e++ = 4;
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*e++ = tmp >> 24;
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*e++ = tmp >> 16;
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*e++ = tmp >> 8;
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*e++ = tmp & 0xff;
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}
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if (RequestedIP) {
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int tmp = ntohl (RequestedIP);
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*e++ = 50; /* Requested IP */
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*e++ = 4;
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*e++ = tmp >> 24;
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*e++ = tmp >> 16;
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*e++ = tmp >> 8;
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*e++ = tmp & 0xff;
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}
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#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
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if ((hostname = getenv ("hostname"))) {
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int hostnamelen = strlen (hostname);
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*e++ = 12; /* Hostname */
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*e++ = hostnamelen;
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memcpy (e, hostname, hostnamelen);
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e += hostnamelen;
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}
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#endif
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#if defined(CONFIG_BOOTP_VENDOREX)
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if ((x = dhcp_vendorex_prep (e)))
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return x - start;
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#endif
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*e++ = 55; /* Parameter Request List */
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cnt = e++; /* Pointer to count of requested items */
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*cnt = 0;
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#if defined(CONFIG_BOOTP_SUBNETMASK)
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*e++ = 1; /* Subnet Mask */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_TIMEOFFSET)
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*e++ = 2;
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_GATEWAY)
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*e++ = 3; /* Router Option */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_DNS)
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*e++ = 6; /* DNS Server(s) */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_HOSTNAME)
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*e++ = 12; /* Hostname */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_BOOTFILESIZE)
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*e++ = 13; /* Boot File Size */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_BOOTPATH)
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*e++ = 17; /* Boot path */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_NISDOMAIN)
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*e++ = 40; /* NIS Domain name request */
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*cnt += 1;
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#endif
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#if defined(CONFIG_BOOTP_NTPSERVER)
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*e++ = 42;
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*cnt += 1;
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#endif
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*e++ = 255; /* End of the list */
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/* Pad to minimal length */
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#ifdef CONFIG_DHCP_MIN_EXT_LEN
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while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN)
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*e++ = 0;
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#endif
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return e - start;
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}
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#else
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/*
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* Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
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*/
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static int BootpExtended (u8 * e)
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{
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u8 *start = e;
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*e++ = 99; /* RFC1048 Magic Cookie */
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*e++ = 130;
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*e++ = 83;
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*e++ = 99;
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#if defined(CONFIG_CMD_DHCP)
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*e++ = 53; /* DHCP Message Type */
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*e++ = 1;
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*e++ = DHCP_DISCOVER;
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*e++ = 57; /* Maximum DHCP Message Size */
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*e++ = 2;
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*e++ = (576 - 312 + OPT_SIZE) >> 16;
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*e++ = (576 - 312 + OPT_SIZE) & 0xff;
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#endif
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#if defined(CONFIG_BOOTP_SUBNETMASK)
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*e++ = 1; /* Subnet mask request */
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*e++ = 4;
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e += 4;
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#endif
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#if defined(CONFIG_BOOTP_GATEWAY)
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*e++ = 3; /* Default gateway request */
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*e++ = 4;
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e += 4;
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#endif
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#if defined(CONFIG_BOOTP_DNS)
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*e++ = 6; /* Domain Name Server */
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*e++ = 4;
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e += 4;
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#endif
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#if defined(CONFIG_BOOTP_HOSTNAME)
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*e++ = 12; /* Host name request */
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*e++ = 32;
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e += 32;
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#endif
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#if defined(CONFIG_BOOTP_BOOTFILESIZE)
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*e++ = 13; /* Boot file size */
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*e++ = 2;
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e += 2;
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#endif
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#if defined(CONFIG_BOOTP_BOOTPATH)
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*e++ = 17; /* Boot path */
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*e++ = 32;
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e += 32;
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#endif
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#if defined(CONFIG_BOOTP_NISDOMAIN)
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*e++ = 40; /* NIS Domain name request */
|
|
*e++ = 32;
|
|
e += 32;
|
|
#endif
|
|
|
|
*e++ = 255; /* End of the list */
|
|
|
|
return e - start;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
BootpRequest (void)
|
|
{
|
|
volatile uchar *pkt, *iphdr;
|
|
Bootp_t *bp;
|
|
int ext_len, pktlen, iplen;
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
dhcp_state = INIT;
|
|
#endif
|
|
|
|
#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
|
|
unsigned char bi_enetaddr[6];
|
|
int reg;
|
|
ulong tst1, tst2, sum, m_mask, m_value = 0;
|
|
|
|
if (BootpTry ==0) {
|
|
/* get our mac */
|
|
eth_getenv_enetaddr("ethaddr", bi_enetaddr);
|
|
|
|
debug("BootpRequest => Our Mac: ");
|
|
for (reg=0; reg<6; reg++)
|
|
debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':');
|
|
|
|
/* Mac-Manipulation 2 get seed1 */
|
|
tst1=0;
|
|
tst2=0;
|
|
for (reg=2; reg<6; reg++) {
|
|
tst1 = tst1 << 8;
|
|
tst1 = tst1 | bi_enetaddr[reg];
|
|
}
|
|
for (reg=0; reg<2; reg++) {
|
|
tst2 = tst2 | bi_enetaddr[reg];
|
|
tst2 = tst2 << 8;
|
|
}
|
|
|
|
seed1 = tst1^tst2;
|
|
|
|
/* Mirror seed1*/
|
|
m_mask=0x1;
|
|
for (reg=1;reg<=32;reg++) {
|
|
m_value |= (m_mask & seed1);
|
|
seed1 = seed1 >> 1;
|
|
m_value = m_value << 1;
|
|
}
|
|
seed1 = m_value;
|
|
seed2 = 0xB78D0945;
|
|
}
|
|
|
|
/* Random Number Generator */
|
|
|
|
for (reg=0;reg<=0;reg++) {
|
|
sum = seed1 + seed2;
|
|
if (sum < seed1 || sum < seed2)
|
|
sum++;
|
|
seed2 = seed1;
|
|
seed1 = sum;
|
|
|
|
if (BootpTry<=2) { /* Start with max 1024 * 1ms */
|
|
sum = sum >> (22-BootpTry);
|
|
} else { /*After 3rd BOOTP request max 8192 * 1ms */
|
|
sum = sum >> 19;
|
|
}
|
|
}
|
|
|
|
printf ("Random delay: %ld ms...\n", sum);
|
|
for (reg=0; reg <sum; reg++) {
|
|
udelay(1000); /*Wait 1ms*/
|
|
}
|
|
#endif /* CONFIG_BOOTP_RANDOM_DELAY */
|
|
|
|
printf("BOOTP broadcast %d\n", ++BootpTry);
|
|
pkt = NetTxPacket;
|
|
memset ((void*)pkt, 0, PKTSIZE);
|
|
|
|
pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
|
|
|
|
/*
|
|
* Next line results in incorrect packet size being transmitted, resulting
|
|
* in errors in some DHCP servers, reporting missing bytes. Size must be
|
|
* set in packet header after extension length has been determined.
|
|
* C. Hallinan, DS4.COM, Inc.
|
|
*/
|
|
/* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
|
|
iphdr = pkt; /* We need this later for NetSetIP() */
|
|
pkt += IP_HDR_SIZE;
|
|
|
|
bp = (Bootp_t *)pkt;
|
|
bp->bp_op = OP_BOOTREQUEST;
|
|
bp->bp_htype = HWT_ETHER;
|
|
bp->bp_hlen = HWL_ETHER;
|
|
bp->bp_hops = 0;
|
|
bp->bp_secs = htons(get_timer(0) / 1000);
|
|
NetWriteIP(&bp->bp_ciaddr, 0);
|
|
NetWriteIP(&bp->bp_yiaddr, 0);
|
|
NetWriteIP(&bp->bp_siaddr, 0);
|
|
NetWriteIP(&bp->bp_giaddr, 0);
|
|
memcpy (bp->bp_chaddr, NetOurEther, 6);
|
|
copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file));
|
|
|
|
/* Request additional information from the BOOTP/DHCP server */
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0);
|
|
#else
|
|
ext_len = BootpExtended((u8 *)bp->bp_vend);
|
|
#endif
|
|
|
|
/*
|
|
* Bootp ID is the lower 4 bytes of our ethernet address
|
|
* plus the current time in ms.
|
|
*/
|
|
BootpID = ((ulong)NetOurEther[2] << 24)
|
|
| ((ulong)NetOurEther[3] << 16)
|
|
| ((ulong)NetOurEther[4] << 8)
|
|
| (ulong)NetOurEther[5];
|
|
BootpID += get_timer(0);
|
|
BootpID = htonl(BootpID);
|
|
NetCopyLong(&bp->bp_id, &BootpID);
|
|
|
|
/*
|
|
* Calculate proper packet lengths taking into account the
|
|
* variable size of the options field
|
|
*/
|
|
pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
|
|
iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
|
|
NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
|
|
NetSetTimeout(SELECT_TIMEOUT, BootpTimeout);
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
dhcp_state = SELECTING;
|
|
NetSetHandler(DhcpHandler);
|
|
#else
|
|
NetSetHandler(BootpHandler);
|
|
#endif
|
|
NetSendPacket(NetTxPacket, pktlen);
|
|
}
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp)
|
|
{
|
|
uchar *end = popt + BOOTP_HDR_SIZE;
|
|
int oplen, size;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
|
|
int *to_ptr;
|
|
#endif
|
|
|
|
while (popt < end && *popt != 0xff) {
|
|
oplen = *(popt + 1);
|
|
switch (*popt) {
|
|
case 1:
|
|
NetCopyIP (&NetOurSubnetMask, (popt + 2));
|
|
break;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
|
|
case 2: /* Time offset */
|
|
to_ptr = &NetTimeOffset;
|
|
NetCopyLong ((ulong *)to_ptr, (ulong *)(popt + 2));
|
|
NetTimeOffset = ntohl (NetTimeOffset);
|
|
break;
|
|
#endif
|
|
case 3:
|
|
NetCopyIP (&NetOurGatewayIP, (popt + 2));
|
|
break;
|
|
case 6:
|
|
NetCopyIP (&NetOurDNSIP, (popt + 2));
|
|
#if defined(CONFIG_BOOTP_DNS2)
|
|
if (*(popt + 1) > 4) {
|
|
NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4));
|
|
}
|
|
#endif
|
|
break;
|
|
case 12:
|
|
size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen);
|
|
memcpy (&NetOurHostName, popt + 2, size);
|
|
NetOurHostName[size] = 0;
|
|
break;
|
|
case 15: /* Ignore Domain Name Option */
|
|
break;
|
|
case 17:
|
|
size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen);
|
|
memcpy (&NetOurRootPath, popt + 2, size);
|
|
NetOurRootPath[size] = 0;
|
|
break;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
|
|
case 42: /* NTP server IP */
|
|
NetCopyIP (&NetNtpServerIP, (popt + 2));
|
|
break;
|
|
#endif
|
|
case 51:
|
|
NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2));
|
|
break;
|
|
case 53: /* Ignore Message Type Option */
|
|
break;
|
|
case 54:
|
|
NetCopyIP (&NetDHCPServerIP, (popt + 2));
|
|
break;
|
|
case 58: /* Ignore Renewal Time Option */
|
|
break;
|
|
case 59: /* Ignore Rebinding Time Option */
|
|
break;
|
|
case 66: /* Ignore TFTP server name */
|
|
break;
|
|
case 67: /* vendor opt bootfile */
|
|
/*
|
|
* I can't use dhcp_vendorex_proc here because I need
|
|
* to write into the bootp packet - even then I had to
|
|
* pass the bootp packet pointer into here as the
|
|
* second arg
|
|
*/
|
|
size = truncate_sz ("Opt Boot File",
|
|
sizeof(bp->bp_file),
|
|
oplen);
|
|
if (bp->bp_file[0] == '\0' && size > 0) {
|
|
/*
|
|
* only use vendor boot file if we didn't
|
|
* receive a boot file in the main non-vendor
|
|
* part of the packet - god only knows why
|
|
* some vendors chose not to use this perfectly
|
|
* good spot to store the boot file (join on
|
|
* Tru64 Unix) it seems mind bogglingly crazy
|
|
* to me
|
|
*/
|
|
printf("*** WARNING: using vendor "
|
|
"optional boot file\n");
|
|
memcpy(bp->bp_file, popt + 2, size);
|
|
bp->bp_file[size] = '\0';
|
|
}
|
|
break;
|
|
default:
|
|
#if defined(CONFIG_BOOTP_VENDOREX)
|
|
if (dhcp_vendorex_proc (popt))
|
|
break;
|
|
#endif
|
|
printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt);
|
|
break;
|
|
}
|
|
popt += oplen + 2; /* Process next option */
|
|
}
|
|
}
|
|
|
|
static int DhcpMessageType(unsigned char *popt)
|
|
{
|
|
if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC))
|
|
return -1;
|
|
|
|
popt += 4;
|
|
while ( *popt != 0xff ) {
|
|
if ( *popt == 53 ) /* DHCP Message Type */
|
|
return *(popt + 2);
|
|
popt += *(popt + 1) + 2; /* Scan through all options */
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void DhcpSendRequestPkt(Bootp_t *bp_offer)
|
|
{
|
|
volatile uchar *pkt, *iphdr;
|
|
Bootp_t *bp;
|
|
int pktlen, iplen, extlen;
|
|
IPaddr_t OfferedIP;
|
|
|
|
debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
|
|
pkt = NetTxPacket;
|
|
memset ((void*)pkt, 0, PKTSIZE);
|
|
|
|
pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
|
|
|
|
iphdr = pkt; /* We'll need this later to set proper pkt size */
|
|
pkt += IP_HDR_SIZE;
|
|
|
|
bp = (Bootp_t *)pkt;
|
|
bp->bp_op = OP_BOOTREQUEST;
|
|
bp->bp_htype = HWT_ETHER;
|
|
bp->bp_hlen = HWL_ETHER;
|
|
bp->bp_hops = 0;
|
|
bp->bp_secs = htons(get_timer(0) / 1000);
|
|
/* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
|
|
* the server yet */
|
|
|
|
/*
|
|
* RFC3046 requires Relay Agents to discard packets with
|
|
* nonzero and offered giaddr
|
|
*/
|
|
NetWriteIP(&bp->bp_giaddr, 0);
|
|
|
|
memcpy (bp->bp_chaddr, NetOurEther, 6);
|
|
|
|
/*
|
|
* ID is the id of the OFFER packet
|
|
*/
|
|
|
|
NetCopyLong(&bp->bp_id, &bp_offer->bp_id);
|
|
|
|
/*
|
|
* Copy options from OFFER packet if present
|
|
*/
|
|
|
|
/* Copy offered IP into the parameters request list */
|
|
NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr);
|
|
extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP);
|
|
|
|
pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
|
|
iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
|
|
NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
|
|
|
|
debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
|
|
#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
|
|
udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
|
|
#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
|
|
NetSendPacket(NetTxPacket, pktlen);
|
|
}
|
|
|
|
/*
|
|
* Handle DHCP received packets.
|
|
*/
|
|
static void
|
|
DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
|
|
{
|
|
Bootp_t *bp = (Bootp_t *)pkt;
|
|
|
|
debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
|
|
src, dest, len, dhcp_state);
|
|
|
|
if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
|
|
return;
|
|
|
|
debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
|
|
src, dest, len, dhcp_state);
|
|
|
|
switch (dhcp_state) {
|
|
case SELECTING:
|
|
/*
|
|
* Wait an appropriate time for any potential DHCPOFFER packets
|
|
* to arrive. Then select one, and generate DHCPREQUEST response.
|
|
* If filename is in format we recognize, assume it is a valid
|
|
* OFFER from a server we want.
|
|
*/
|
|
debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
|
|
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
|
|
if (strncmp(bp->bp_file,
|
|
CONFIG_SYS_BOOTFILE_PREFIX,
|
|
strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) {
|
|
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
|
|
|
|
debug("TRANSITIONING TO REQUESTING STATE\n");
|
|
dhcp_state = REQUESTING;
|
|
|
|
if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
|
|
DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
|
|
|
|
NetSetTimeout(TIMEOUT, BootpTimeout);
|
|
DhcpSendRequestPkt(bp);
|
|
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
|
|
}
|
|
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
|
|
|
|
return;
|
|
break;
|
|
case REQUESTING:
|
|
debug("DHCP State: REQUESTING\n");
|
|
|
|
if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) {
|
|
char *s;
|
|
|
|
if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
|
|
DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
|
|
BootpCopyNetParams(bp); /* Store net params from reply */
|
|
dhcp_state = BOUND;
|
|
printf ("DHCP client bound to address %pI4\n", &NetOurIP);
|
|
|
|
/* Obey the 'autoload' setting */
|
|
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
|
|
}
|
|
}
|
|
TftpStart();
|
|
return;
|
|
}
|
|
break;
|
|
case BOUND:
|
|
/* DHCP client bound to address */
|
|
break;
|
|
default:
|
|
puts ("DHCP: INVALID STATE\n");
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
void DhcpRequest(void)
|
|
{
|
|
BootpRequest();
|
|
}
|
|
#endif /* CONFIG_CMD_DHCP */
|