mirror of
https://github.com/u-boot/u-boot.git
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Initial revision
This commit is contained in:
wdenk
parent
2194ffd5f4
commit
3861aa5ce0
885
net/bootp.c
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885
net/bootp.c
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@ -0,0 +1,885 @@
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/*
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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 2000-2002 Wolfgang Denk, wd@denx.de
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*/
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#if 0
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#define DEBUG 1 /* general debug */
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#define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */
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#endif
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#ifdef DEBUG_BOOTP_EXT
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#define debug_ext(fmt,args...) printf (fmt ,##args)
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#else
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#define debug_ext(fmt,args...)
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#endif
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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 "arp.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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#if (CONFIG_COMMANDS & CFG_CMD_NET)
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#define TIMEOUT 5 /* Seconds 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 (CONFIG_COMMANDS & CFG_CMD_DHCP)
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dhcp_state_t dhcp_state = INIT;
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unsigned int dhcp_leasetime = 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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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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#if (CONFIG_BOOTP_MASK & 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 /* CFG_CMD_DHCP */
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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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void BootpCopyNetParams(Bootp_t *bp)
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{
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NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
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NetCopyIP(&NetServerIP, &bp->bp_siaddr);
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memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6);
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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 !(CONFIG_COMMANDS & CFG_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_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, *(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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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 informations 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",
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sizeof(NetOurNISDomain),
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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 informations 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_ext ("[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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#ifdef DEBUG_BOOTP_EXT
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printf("[BOOTP] Received fields: \n");
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if (NetOurSubnetMask) {
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puts ("NetOurSubnetMask : ");
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print_IPaddr (NetOurSubnetMask);
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putc('\n');
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}
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if (NetOurGatewayIP) {
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puts ("NetOurGatewayIP : ");
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print_IPaddr (NetOurGatewayIP);
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putc('\n');
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}
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if (NetBootFileSize) {
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printf("NetBootFileSize : %d\n", NetBootFileSize);
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}
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if (NetOurHostName[0]) {
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printf("NetOurHostName : %s\n", NetOurHostName);
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}
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if (NetOurRootPath[0]) {
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printf("NetOurRootPath : %s\n", NetOurRootPath);
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}
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if (NetOurNISDomain[0]) {
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printf("NetOurNISDomain : %s\n", NetOurNISDomain);
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}
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if (NetBootFileSize) {
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printf("NetBootFileSize: %d\n", NetBootFileSize);
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}
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#endif /* DEBUG_BOOTP_EXT */
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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=%d)\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(&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) && (*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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}
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/* Send ARP request to get TFTP server ethernet address.
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* This automagically starts TFTP, too.
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*/
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ArpRequest();
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}
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#endif /* !CFG_CMD_DHCP */
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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 * CFG_HZ, 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 (CONFIG_COMMANDS & CFG_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 (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
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u8 *x;
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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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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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*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 /* CFG_CMD_DHCP */
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/*
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* Warning: no field size check - change CONFIG_BOOTP_MASK 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;
|
||||
*e++ = 83;
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||||
*e++ = 99;
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||||
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#if (CONFIG_COMMANDS & CFG_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 /* CFG_CMD_DHCP */
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#if (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
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*e++ = 6; /* Domain Name Server */
|
||||
*e++ = 4;
|
||||
e += 4;
|
||||
#endif
|
||||
|
||||
#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
|
||||
*e++ = 12; /* Host name request */
|
||||
*e++ = 32;
|
||||
e += 32;
|
||||
#endif
|
||||
|
||||
#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
|
||||
*e++ = 13; /* Boot file size */
|
||||
*e++ = 2;
|
||||
e += 2;
|
||||
#endif
|
||||
|
||||
#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
|
||||
*e++ = 17; /* Boot path */
|
||||
*e++ = 32;
|
||||
e += 32;
|
||||
#endif
|
||||
|
||||
#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
|
||||
*e++ = 40; /* NIS Domain name request */
|
||||
*e++ = 32;
|
||||
e += 32;
|
||||
#endif
|
||||
|
||||
*e++ = 255; /* End of the list */
|
||||
|
||||
return e - start ;
|
||||
}
|
||||
#endif /* CFG_CMD_DHCP */
|
||||
|
||||
void
|
||||
BootpRequest (void)
|
||||
{
|
||||
volatile uchar *pkt, *iphdr;
|
||||
Bootp_t *bp;
|
||||
int ext_len, pktlen, iplen;
|
||||
|
||||
#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
|
||||
dhcp_state = INIT;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
|
||||
unsigned char bi_enetaddr[6];
|
||||
int reg;
|
||||
char *e,*s;
|
||||
uchar tmp[64];
|
||||
ulong tst1, tst2, sum, m_mask, m_value = 0;
|
||||
|
||||
if (BootpTry ==0) {
|
||||
/* get our mac */
|
||||
reg = getenv_r ("ethaddr", tmp, sizeof(tmp));
|
||||
s = (reg > 0) ? tmp : NULL;
|
||||
|
||||
for (reg=0; reg<6; ++reg) {
|
||||
bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0;
|
||||
if (s) {
|
||||
s = (*e) ? e+1 : e;
|
||||
}
|
||||
}
|
||||
#ifdef DEBUG
|
||||
printf("BootpRequest => Our Mac: ");
|
||||
for (reg=0; reg<6; reg++) {
|
||||
printf ("%x%c",
|
||||
bi_enetaddr[reg],
|
||||
reg==5 ? '\n' : ':');
|
||||
}
|
||||
#endif /* DEBUG */
|
||||
|
||||
/* 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);
|
||||
|
||||
NetSetEther(pkt, NetBcastAddr, PROT_IP);
|
||||
pkt += ETHER_HDR_SIZE;
|
||||
|
||||
/*
|
||||
* 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) / CFG_HZ);
|
||||
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 (CONFIG_COMMANDS & CFG_CMD_DHCP)
|
||||
ext_len = DhcpExtended(bp->bp_vend, DHCP_DISCOVER, 0, 0);
|
||||
#else
|
||||
ext_len = BootpExtended(bp->bp_vend);
|
||||
#endif /* CFG_CMD_DHCP */
|
||||
|
||||
/*
|
||||
* Bootp ID is the lower 4 bytes of our ethernet address
|
||||
* plus the current time in HZ.
|
||||
*/
|
||||
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 = BOOTP_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 * CFG_HZ, BootpTimeout);
|
||||
|
||||
#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
|
||||
dhcp_state = SELECTING;
|
||||
NetSetHandler(DhcpHandler);
|
||||
#else
|
||||
NetSetHandler(BootpHandler);
|
||||
#endif /* CFG_CMD_DHCP */
|
||||
NetSendPacket(NetTxPacket, pktlen);
|
||||
}
|
||||
|
||||
#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
|
||||
void DhcpOptionsProcess(char *popt)
|
||||
{
|
||||
char *end = popt + BOOTP_HDR_SIZE;
|
||||
int oplen, size;
|
||||
|
||||
while ( popt < end && *popt != 0xff ) {
|
||||
oplen = *(popt + 1);
|
||||
switch(*popt) {
|
||||
case 1:
|
||||
NetCopyIP(&NetOurSubnetMask, (popt+2));
|
||||
break;
|
||||
case 3:
|
||||
NetCopyIP(&NetOurGatewayIP, (popt+2));
|
||||
break;
|
||||
case 6:
|
||||
NetCopyIP(&NetOurDNSIP, (popt+2));
|
||||
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;
|
||||
case 51:
|
||||
dhcp_leasetime = *(unsigned int *)(popt + 2);
|
||||
break;
|
||||
case 53: /* Ignore Message Type Option */
|
||||
break;
|
||||
case 54:
|
||||
NetCopyIP(&NetServerIP, (popt+2));
|
||||
break;
|
||||
case 58: /* Ignore Renewal Time Option */
|
||||
break;
|
||||
case 59: /* Ignore Rebinding Time Option */
|
||||
break;
|
||||
default:
|
||||
#if (CONFIG_BOOTP_MASK & 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;
|
||||
}
|
||||
|
||||
void DhcpSendRequestPkt(Bootp_t *bp_offer)
|
||||
{
|
||||
volatile uchar *pkt, *iphdr;
|
||||
Bootp_t *bp;
|
||||
int pktlen, iplen, extlen;
|
||||
|
||||
debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
|
||||
pkt = NetTxPacket;
|
||||
memset ((void*)pkt, 0, PKTSIZE);
|
||||
|
||||
NetSetEther(pkt, NetBcastAddr, PROT_IP);
|
||||
pkt += ETHER_HDR_SIZE;
|
||||
|
||||
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) / CFG_HZ);
|
||||
NetCopyIP(&bp->bp_ciaddr, &bp_offer->bp_ciaddr); /* both in network byte order */
|
||||
NetCopyIP(&bp->bp_yiaddr, &bp_offer->bp_yiaddr);
|
||||
NetCopyIP(&bp->bp_siaddr, &bp_offer->bp_siaddr);
|
||||
NetCopyIP(&bp->bp_giaddr, &bp_offer->bp_giaddr);
|
||||
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
|
||||
*/
|
||||
extlen = DhcpExtended(bp->bp_vend, DHCP_REQUEST, NetServerIP, bp->bp_yiaddr);
|
||||
|
||||
pktlen = BOOTP_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);
|
||||
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 CFG_BOOTFILE_PREFIX
|
||||
if (strncmp(bp->bp_file,
|
||||
CFG_BOOTFILE_PREFIX,
|
||||
strlen(CFG_BOOTFILE_PREFIX)) == 0 ) {
|
||||
#endif /* CFG_BOOTFILE_PREFIX */
|
||||
|
||||
debug ("TRANSITIONING TO REQUESTING STATE\n");
|
||||
dhcp_state = REQUESTING;
|
||||
#if 0
|
||||
if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
|
||||
DhcpOptionsProcess(&bp->bp_vend[4]);
|
||||
|
||||
#endif
|
||||
BootpCopyNetParams(bp); /* Store net params from reply */
|
||||
|
||||
NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout);
|
||||
DhcpSendRequestPkt(bp);
|
||||
#ifdef CFG_BOOTFILE_PREFIX
|
||||
}
|
||||
#endif /* CFG_BOOTFILE_PREFIX */
|
||||
|
||||
return;
|
||||
break;
|
||||
case REQUESTING:
|
||||
debug ("DHCP State: REQUESTING\n");
|
||||
|
||||
if ( DhcpMessageType(bp->bp_vend) == DHCP_ACK ) {
|
||||
char *s;
|
||||
|
||||
if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
|
||||
DhcpOptionsProcess(&bp->bp_vend[4]);
|
||||
BootpCopyNetParams(bp); /* Store net params from reply */
|
||||
dhcp_state = BOUND;
|
||||
printf("DHCP client bound to address ");
|
||||
print_IPaddr(NetOurIP);
|
||||
printf("\n");
|
||||
|
||||
/* Obey the 'autoload' setting */
|
||||
if (((s = getenv("autoload")) != NULL) && (*s == 'n')) {
|
||||
NetState = NETLOOP_SUCCESS;
|
||||
return;
|
||||
}
|
||||
/* Send ARP request to get TFTP server ethernet address.
|
||||
* This automagically starts TFTP, too.
|
||||
*/
|
||||
ArpRequest();
|
||||
return;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
printf("DHCP: INVALID STATE\n");
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void DhcpRequest(void)
|
||||
{
|
||||
BootpRequest();
|
||||
}
|
||||
#endif /* CFG_CMD_DHCP */
|
||||
|
||||
#endif /* CFG_CMD_NET */
|
||||
Loading…
Reference in New Issue
Block a user