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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; |
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*e++ = 83; |
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*e++ = 99; |
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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 */ |
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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_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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & 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 (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN) |
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*e++ = 40; /* NIS Domain name request */ |
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*e++ = 32; |
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e += 32; |
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#endif |
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*e++ = 255; /* End of the list */ |
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return e - start ; |
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} |
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#endif /* CFG_CMD_DHCP */ |
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void |
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BootpRequest (void) |
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{ |
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volatile uchar *pkt, *iphdr; |
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Bootp_t *bp; |
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int ext_len, pktlen, iplen; |
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#if (CONFIG_COMMANDS & CFG_CMD_DHCP) |
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dhcp_state = INIT; |
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#endif |
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#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ |
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unsigned char bi_enetaddr[6]; |
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int reg; |
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char *e,*s; |
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uchar tmp[64]; |
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ulong tst1, tst2, sum, m_mask, m_value = 0; |
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if (BootpTry ==0) { |
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/* get our mac */ |
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reg = getenv_r ("ethaddr", tmp, sizeof(tmp)); |
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s = (reg > 0) ? tmp : NULL; |
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for (reg=0; reg<6; ++reg) { |
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bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0; |
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if (s) { |
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s = (*e) ? e+1 : e; |
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} |
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} |
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#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