diff options
Diffstat (limited to 'u-boot/net/bootp.c')
| -rw-r--r-- | u-boot/net/bootp.c | 952 |
1 files changed, 952 insertions, 0 deletions
diff --git a/u-boot/net/bootp.c b/u-boot/net/bootp.c new file mode 100644 index 0000000..1a71786 --- /dev/null +++ b/u-boot/net/bootp.c @@ -0,0 +1,952 @@ +/* + * Based on LiMon - BOOTP. + * + * Copyright 1994, 1995, 2000 Neil Russell. + * (See License) + * Copyright 2000 Roland Borde + * Copyright 2000 Paolo Scaffardi + * Copyright 2000-2004 Wolfgang Denk, wd@denx.de + */ + +#include <common.h> +#include <command.h> +#include <net.h> +#include "bootp.h" +#include "tftp.h" +#include "nfs.h" +#ifdef CONFIG_STATUS_LED +#include <status_led.h> +#endif + +#define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ + +#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ +#ifndef CONFIG_NET_RETRY_COUNT +# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ +#else +# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) +#endif + +#define PORT_BOOTPS 67 /* BOOTP server UDP port */ +#define PORT_BOOTPC 68 /* BOOTP client UDP port */ + +#ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ +#define CONFIG_DHCP_MIN_EXT_LEN 64 +#endif + +ulong BootpID; +int BootpTry; +#ifdef CONFIG_BOOTP_RANDOM_DELAY +ulong seed1, seed2; +#endif + +#if defined(CONFIG_CMD_DHCP) +dhcp_state_t dhcp_state = INIT; +unsigned long dhcp_leasetime = 0; +IPaddr_t NetDHCPServerIP = 0; +static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len); + +/* For Debug */ +#if 0 +static char *dhcpmsg2str(int type) +{ + switch (type) { + case 1: return "DHCPDISCOVER"; break; + case 2: return "DHCPOFFER"; break; + case 3: return "DHCPREQUEST"; break; + case 4: return "DHCPDECLINE"; break; + case 5: return "DHCPACK"; break; + case 6: return "DHCPNACK"; break; + case 7: return "DHCPRELEASE"; break; + default: return "UNKNOWN/INVALID MSG TYPE"; break; + } +} +#endif + +#if defined(CONFIG_BOOTP_VENDOREX) +extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ +extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ +#endif + +#endif + +static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) +{ + Bootp_t *bp = (Bootp_t *) pkt; + int retval = 0; + + if (dest != PORT_BOOTPC || src != PORT_BOOTPS) + retval = -1; + else if (len < sizeof (Bootp_t) - OPT_SIZE) + retval = -2; + else if (bp->bp_op != OP_BOOTREQUEST && + bp->bp_op != OP_BOOTREPLY && + bp->bp_op != DHCP_OFFER && + bp->bp_op != DHCP_ACK && + bp->bp_op != DHCP_NAK ) { + retval = -3; + } + else if (bp->bp_htype != HWT_ETHER) + retval = -4; + else if (bp->bp_hlen != HWL_ETHER) + retval = -5; + else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { + retval = -6; + } + + debug("Filtering pkt = %d\n", retval); + + return retval; +} + +/* + * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet + */ +static void BootpCopyNetParams(Bootp_t *bp) +{ + IPaddr_t tmp_ip; + + NetCopyIP(&NetOurIP, &bp->bp_yiaddr); +#if !defined(CONFIG_BOOTP_SERVERIP) + NetCopyIP(&tmp_ip, &bp->bp_siaddr); + if (tmp_ip != 0) + NetCopyIP(&NetServerIP, &bp->bp_siaddr); + memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); +#endif + if (strlen(bp->bp_file) > 0) + copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); + + debug("Bootfile: %s\n", BootFile); + + /* Propagate to environment: + * don't delete exising entry when BOOTP / DHCP reply does + * not contain a new value + */ + if (*BootFile) { + setenv ("bootfile", BootFile); + } +} + +static int truncate_sz (const char *name, int maxlen, int curlen) +{ + if (curlen >= maxlen) { + printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", + name, curlen, maxlen); + curlen = maxlen - 1; + } + return (curlen); +} + +#if !defined(CONFIG_CMD_DHCP) + +static void BootpVendorFieldProcess (u8 * ext) +{ + int size = *(ext + 1); + + debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, + *(ext + 1)); + + NetBootFileSize = 0; + + switch (*ext) { + /* Fixed length fields */ + case 1: /* Subnet mask */ + if (NetOurSubnetMask == 0) + NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2)); + break; + case 2: /* Time offset - Not yet supported */ + break; + /* Variable length fields */ + case 3: /* Gateways list */ + if (NetOurGatewayIP == 0) { + NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2)); + } + break; + case 4: /* Time server - Not yet supported */ + break; + case 5: /* IEN-116 name server - Not yet supported */ + break; + case 6: + if (NetOurDNSIP == 0) { + NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2)); + } +#if defined(CONFIG_BOOTP_DNS2) + if ((NetOurDNS2IP == 0) && (size > 4)) { + NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4)); + } +#endif + break; + case 7: /* Log server - Not yet supported */ + break; + case 8: /* Cookie/Quote server - Not yet supported */ + break; + case 9: /* LPR server - Not yet supported */ + break; + case 10: /* Impress server - Not yet supported */ + break; + case 11: /* RPL server - Not yet supported */ + break; + case 12: /* Host name */ + if (NetOurHostName[0] == 0) { + size = truncate_sz ("Host Name", sizeof (NetOurHostName), size); + memcpy (&NetOurHostName, ext + 2, size); + NetOurHostName[size] = 0; + } + break; + case 13: /* Boot file size */ + if (size == 2) + NetBootFileSize = ntohs (*(ushort *) (ext + 2)); + else if (size == 4) + NetBootFileSize = ntohl (*(ulong *) (ext + 2)); + break; + case 14: /* Merit dump file - Not yet supported */ + break; + case 15: /* Domain name - Not yet supported */ + break; + case 16: /* Swap server - Not yet supported */ + break; + case 17: /* Root path */ + if (NetOurRootPath[0] == 0) { + size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size); + memcpy (&NetOurRootPath, ext + 2, size); + NetOurRootPath[size] = 0; + } + break; + case 18: /* Extension path - Not yet supported */ + /* + * This can be used to send the information of the + * vendor area in another file that the client can + * access via TFTP. + */ + break; + /* IP host layer fields */ + case 40: /* NIS Domain name */ + if (NetOurNISDomain[0] == 0) { + size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size); + memcpy (&NetOurNISDomain, ext + 2, size); + NetOurNISDomain[size] = 0; + } + break; + /* Application layer fields */ + case 43: /* Vendor specific info - Not yet supported */ + /* + * Binary information to exchange specific + * product information. + */ + break; + /* Reserved (custom) fields (128..254) */ + } +} + +static void BootpVendorProcess (u8 * ext, int size) +{ + u8 *end = ext + size; + + debug("[BOOTP] Checking extension (%d bytes)...\n", size); + + while ((ext < end) && (*ext != 0xff)) { + if (*ext == 0) { + ext++; + } else { + u8 *opt = ext; + + ext += ext[1] + 2; + if (ext <= end) + BootpVendorFieldProcess (opt); + } + } + + debug("[BOOTP] Received fields: \n"); + if (NetOurSubnetMask) + debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); + + if (NetOurGatewayIP) + debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP); + + if (NetBootFileSize) + debug("NetBootFileSize : %d\n", NetBootFileSize); + + if (NetOurHostName[0]) + debug("NetOurHostName : %s\n", NetOurHostName); + + if (NetOurRootPath[0]) + debug("NetOurRootPath : %s\n", NetOurRootPath); + + if (NetOurNISDomain[0]) + debug("NetOurNISDomain : %s\n", NetOurNISDomain); + + if (NetBootFileSize) + debug("NetBootFileSize: %d\n", NetBootFileSize); +} +/* + * Handle a BOOTP received packet. + */ +static void +BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) +{ + Bootp_t *bp; + char *s; + + debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", + src, dest, len, sizeof (Bootp_t)); + + bp = (Bootp_t *)pkt; + + if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ + return; + + /* + * Got a good BOOTP reply. Copy the data into our variables. + */ +#ifdef CONFIG_STATUS_LED + status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); +#endif + + BootpCopyNetParams(bp); /* Store net parameters from reply */ + + /* Retrieve extended information (we must parse the vendor area) */ + if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) + BootpVendorProcess((uchar *)&bp->bp_vend[4], len); + + NetSetTimeout(0, (thand_f *)0); + + debug("Got good BOOTP\n"); + + if ((s = getenv("autoload")) != NULL) { + if (*s == 'n') { + /* + * Just use BOOTP to configure system; + * Do not use TFTP to load the bootfile. + */ + NetState = NETLOOP_SUCCESS; + return; +#if defined(CONFIG_CMD_NFS) + } else if (strcmp(s, "NFS") == 0) { + /* + * Use NFS to load the bootfile. + */ + NfsStart(); + return; +#endif + } + } + + TftpStart(); +} +#endif + +/* + * Timeout on BOOTP/DHCP request. + */ +static void +BootpTimeout(void) +{ + if (BootpTry >= TIMEOUT_COUNT) { + puts ("\nRetry count exceeded; starting again\n"); + NetStartAgain (); + } else { + NetSetTimeout (TIMEOUT, BootpTimeout); + BootpRequest (); + } +} + +/* + * Initialize BOOTP extension fields in the request. + */ +#if defined(CONFIG_CMD_DHCP) +static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) +{ + u8 *start = e; + u8 *cnt; + +#if defined(CONFIG_BOOTP_VENDOREX) + u8 *x; +#endif +#if defined(CONFIG_BOOTP_SEND_HOSTNAME) + char *hostname; +#endif + + *e++ = 99; /* RFC1048 Magic Cookie */ + *e++ = 130; + *e++ = 83; + *e++ = 99; + + *e++ = 53; /* DHCP Message Type */ + *e++ = 1; + *e++ = message_type; + + *e++ = 57; /* Maximum DHCP Message Size */ + *e++ = 2; + *e++ = (576 - 312 + OPT_SIZE) >> 8; + *e++ = (576 - 312 + OPT_SIZE) & 0xff; + + if (ServerID) { + int tmp = ntohl (ServerID); + + *e++ = 54; /* ServerID */ + *e++ = 4; + *e++ = tmp >> 24; + *e++ = tmp >> 16; + *e++ = tmp >> 8; + *e++ = tmp & 0xff; + } + + if (RequestedIP) { + int tmp = ntohl (RequestedIP); + + *e++ = 50; /* Requested IP */ + *e++ = 4; + *e++ = tmp >> 24; + *e++ = tmp >> 16; + *e++ = tmp >> 8; + *e++ = tmp & 0xff; + } +#if defined(CONFIG_BOOTP_SEND_HOSTNAME) + if ((hostname = getenv ("hostname"))) { + int hostnamelen = strlen (hostname); + + *e++ = 12; /* Hostname */ + *e++ = hostnamelen; + memcpy (e, hostname, hostnamelen); + e += hostnamelen; + } +#endif + +#if defined(CONFIG_BOOTP_VENDOREX) + if ((x = dhcp_vendorex_prep (e))) + return x - start; +#endif + + *e++ = 55; /* Parameter Request List */ + cnt = e++; /* Pointer to count of requested items */ + *cnt = 0; +#if defined(CONFIG_BOOTP_SUBNETMASK) + *e++ = 1; /* Subnet Mask */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_TIMEOFFSET) + *e++ = 2; + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_GATEWAY) + *e++ = 3; /* Router Option */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_DNS) + *e++ = 6; /* DNS Server(s) */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_HOSTNAME) + *e++ = 12; /* Hostname */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_BOOTFILESIZE) + *e++ = 13; /* Boot File Size */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_BOOTPATH) + *e++ = 17; /* Boot path */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_NISDOMAIN) + *e++ = 40; /* NIS Domain name request */ + *cnt += 1; +#endif +#if defined(CONFIG_BOOTP_NTPSERVER) + *e++ = 42; + *cnt += 1; +#endif + /* no options, so back up to avoid sending an empty request list */ + if (*cnt == 0) + e -= 2; + + *e++ = 255; /* End of the list */ + + /* Pad to minimal length */ +#ifdef CONFIG_DHCP_MIN_EXT_LEN + while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN) + *e++ = 0; +#endif + + return e - start; +} + +#else +/* + * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! + */ +static int BootpExtended (u8 * e) +{ + u8 *start = e; + + *e++ = 99; /* RFC1048 Magic Cookie */ + *e++ = 130; + *e++ = 83; + *e++ = 99; + +#if defined(CONFIG_CMD_DHCP) + *e++ = 53; /* DHCP Message Type */ + *e++ = 1; + *e++ = DHCP_DISCOVER; + + *e++ = 57; /* Maximum DHCP Message Size */ + *e++ = 2; + *e++ = (576 - 312 + OPT_SIZE) >> 16; + *e++ = (576 - 312 + OPT_SIZE) & 0xff; +#endif + +#if defined(CONFIG_BOOTP_SUBNETMASK) + *e++ = 1; /* Subnet mask request */ + *e++ = 4; + e += 4; +#endif + +#if defined(CONFIG_BOOTP_GATEWAY) + *e++ = 3; /* Default gateway request */ + *e++ = 4; + e += 4; +#endif + +#if defined(CONFIG_BOOTP_DNS) + *e++ = 6; /* Domain Name Server */ + *e++ = 4; + e += 4; +#endif + +#if defined(CONFIG_BOOTP_HOSTNAME) + *e++ = 12; /* Host name request */ + *e++ = 32; + e += 32; +#endif + +#if defined(CONFIG_BOOTP_BOOTFILESIZE) + *e++ = 13; /* Boot file size */ + *e++ = 2; + e += 2; +#endif + +#if defined(CONFIG_BOOTP_BOOTPATH) + *e++ = 17; /* Boot path */ + *e++ = 32; + e += 32; +#endif + +#if defined(CONFIG_BOOTP_NISDOMAIN) + *e++ = 40; /* NIS Domain name request */ + *e++ = 32; + e += 32; +#endif + + *e++ = 255; /* End of the list */ + + return e - start; +} +#endif + +void +BootpRequest (void) +{ + volatile uchar *pkt, *iphdr; + Bootp_t *bp; + int ext_len, pktlen, iplen; + +#if defined(CONFIG_CMD_DHCP) + dhcp_state = INIT; +#endif + +#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ + unsigned char bi_enetaddr[6]; + int reg; + ulong tst1, tst2, sum, m_mask, m_value = 0; + + if (BootpTry ==0) { + /* get our mac */ + eth_getenv_enetaddr("ethaddr", bi_enetaddr); + + debug("BootpRequest => Our Mac: "); + for (reg=0; reg<6; reg++) + debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':'); + + /* Mac-Manipulation 2 get seed1 */ + tst1=0; + tst2=0; + for (reg=2; reg<6; reg++) { + tst1 = tst1 << 8; + tst1 = tst1 | bi_enetaddr[reg]; + } + for (reg=0; reg<2; reg++) { + tst2 = tst2 | bi_enetaddr[reg]; + tst2 = tst2 << 8; + } + + seed1 = tst1^tst2; + + /* Mirror seed1*/ + m_mask=0x1; + for (reg=1;reg<=32;reg++) { + m_value |= (m_mask & seed1); + seed1 = seed1 >> 1; + m_value = m_value << 1; + } + seed1 = m_value; + seed2 = 0xB78D0945; + } + + /* Random Number Generator */ + + for (reg=0;reg<=0;reg++) { + sum = seed1 + seed2; + if (sum < seed1 || sum < seed2) + sum++; + seed2 = seed1; + seed1 = sum; + + if (BootpTry<=2) { /* Start with max 1024 * 1ms */ + sum = sum >> (22-BootpTry); + } else { /*After 3rd BOOTP request max 8192 * 1ms */ + sum = sum >> 19; + } + } + + printf ("Random delay: %ld ms...\n", sum); + for (reg=0; reg <sum; reg++) { + udelay(1000); /*Wait 1ms*/ + } +#endif /* CONFIG_BOOTP_RANDOM_DELAY */ + + printf("BOOTP broadcast %d\n", ++BootpTry); + pkt = NetTxPacket; + memset ((void*)pkt, 0, PKTSIZE); + + pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); + + /* + * Next line results in incorrect packet size being transmitted, resulting + * in errors in some DHCP servers, reporting missing bytes. Size must be + * set in packet header after extension length has been determined. + * C. Hallinan, DS4.COM, Inc. + */ + /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ + iphdr = pkt; /* We need this later for NetSetIP() */ + pkt += IP_HDR_SIZE; + + bp = (Bootp_t *)pkt; + bp->bp_op = OP_BOOTREQUEST; + bp->bp_htype = HWT_ETHER; + bp->bp_hlen = HWL_ETHER; + bp->bp_hops = 0; + bp->bp_secs = htons(get_timer(0) / 1000); + NetWriteIP(&bp->bp_ciaddr, 0); + NetWriteIP(&bp->bp_yiaddr, 0); + NetWriteIP(&bp->bp_siaddr, 0); + NetWriteIP(&bp->bp_giaddr, 0); + memcpy (bp->bp_chaddr, NetOurEther, 6); + copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); + + /* Request additional information from the BOOTP/DHCP server */ +#if defined(CONFIG_CMD_DHCP) + ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); +#else + ext_len = BootpExtended((u8 *)bp->bp_vend); +#endif + + /* + * Bootp ID is the lower 4 bytes of our ethernet address + * plus the current time in ms. + */ + BootpID = ((ulong)NetOurEther[2] << 24) + | ((ulong)NetOurEther[3] << 16) + | ((ulong)NetOurEther[4] << 8) + | (ulong)NetOurEther[5]; + BootpID += get_timer(0); + BootpID = htonl(BootpID); + NetCopyLong(&bp->bp_id, &BootpID); + + /* + * Calculate proper packet lengths taking into account the + * variable size of the options field + */ + pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; + iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; + NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); + NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); + +#if defined(CONFIG_CMD_DHCP) + dhcp_state = SELECTING; + NetSetHandler(DhcpHandler); +#else + NetSetHandler(BootpHandler); +#endif + NetSendPacket(NetTxPacket, pktlen); +} + +#if defined(CONFIG_CMD_DHCP) +static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) +{ + uchar *end = popt + BOOTP_HDR_SIZE; + int oplen, size; +#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) + int *to_ptr; +#endif + + while (popt < end && *popt != 0xff) { + oplen = *(popt + 1); + switch (*popt) { + case 1: + NetCopyIP (&NetOurSubnetMask, (popt + 2)); + break; +#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) + case 2: /* Time offset */ + to_ptr = &NetTimeOffset; + NetCopyLong ((ulong *)to_ptr, (ulong *)(popt + 2)); + NetTimeOffset = ntohl (NetTimeOffset); + break; +#endif + case 3: + NetCopyIP (&NetOurGatewayIP, (popt + 2)); + break; + case 6: + NetCopyIP (&NetOurDNSIP, (popt + 2)); +#if defined(CONFIG_BOOTP_DNS2) + if (*(popt + 1) > 4) { + NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); + } +#endif + break; + case 12: + size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); + memcpy (&NetOurHostName, popt + 2, size); + NetOurHostName[size] = 0; + break; + case 15: /* Ignore Domain Name Option */ + break; + case 17: + size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); + memcpy (&NetOurRootPath, popt + 2, size); + NetOurRootPath[size] = 0; + break; +#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) + case 42: /* NTP server IP */ + NetCopyIP (&NetNtpServerIP, (popt + 2)); + break; +#endif + case 51: + NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); + break; + case 53: /* Ignore Message Type Option */ + break; + case 54: + NetCopyIP (&NetDHCPServerIP, (popt + 2)); + break; + case 58: /* Ignore Renewal Time Option */ + break; + case 59: /* Ignore Rebinding Time Option */ + break; + case 66: /* Ignore TFTP server name */ + break; + case 67: /* vendor opt bootfile */ + /* + * I can't use dhcp_vendorex_proc here because I need + * to write into the bootp packet - even then I had to + * pass the bootp packet pointer into here as the + * second arg + */ + size = truncate_sz ("Opt Boot File", + sizeof(bp->bp_file), + oplen); + if (bp->bp_file[0] == '\0' && size > 0) { + /* + * only use vendor boot file if we didn't + * receive a boot file in the main non-vendor + * part of the packet - god only knows why + * some vendors chose not to use this perfectly + * good spot to store the boot file (join on + * Tru64 Unix) it seems mind bogglingly crazy + * to me + */ + printf("*** WARNING: using vendor " + "optional boot file\n"); + memcpy(bp->bp_file, popt + 2, size); + bp->bp_file[size] = '\0'; + } + break; + default: +#if defined(CONFIG_BOOTP_VENDOREX) + if (dhcp_vendorex_proc (popt)) + break; +#endif + printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); + break; + } + popt += oplen + 2; /* Process next option */ + } +} + +static int DhcpMessageType(unsigned char *popt) +{ + if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) + return -1; + + popt += 4; + while ( *popt != 0xff ) { + if ( *popt == 53 ) /* DHCP Message Type */ + return *(popt + 2); + popt += *(popt + 1) + 2; /* Scan through all options */ + } + return -1; +} + +static void DhcpSendRequestPkt(Bootp_t *bp_offer) +{ + volatile uchar *pkt, *iphdr; + Bootp_t *bp; + int pktlen, iplen, extlen; + IPaddr_t OfferedIP; + + debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); + pkt = NetTxPacket; + memset ((void*)pkt, 0, PKTSIZE); + + pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); + + iphdr = pkt; /* We'll need this later to set proper pkt size */ + pkt += IP_HDR_SIZE; + + bp = (Bootp_t *)pkt; + bp->bp_op = OP_BOOTREQUEST; + bp->bp_htype = HWT_ETHER; + bp->bp_hlen = HWL_ETHER; + bp->bp_hops = 0; + bp->bp_secs = htons(get_timer(0) / 1000); + /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by + * the server yet */ + + /* + * RFC3046 requires Relay Agents to discard packets with + * nonzero and offered giaddr + */ + NetWriteIP(&bp->bp_giaddr, 0); + + memcpy (bp->bp_chaddr, NetOurEther, 6); + + /* + * ID is the id of the OFFER packet + */ + + NetCopyLong(&bp->bp_id, &bp_offer->bp_id); + + /* + * Copy options from OFFER packet if present + */ + + /* Copy offered IP into the parameters request list */ + NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); + extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); + + pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; + iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; + NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); + + debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); +#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY + udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); +#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ + NetSendPacket(NetTxPacket, pktlen); +} + +/* + * Handle DHCP received packets. + */ +static void +DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) +{ + Bootp_t *bp = (Bootp_t *)pkt; + + debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", + src, dest, len, dhcp_state); + + if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ + return; + + debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", + src, dest, len, dhcp_state); + + switch (dhcp_state) { + case SELECTING: + /* + * Wait an appropriate time for any potential DHCPOFFER packets + * to arrive. Then select one, and generate DHCPREQUEST response. + * If filename is in format we recognize, assume it is a valid + * OFFER from a server we want. + */ + debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); +#ifdef CONFIG_SYS_BOOTFILE_PREFIX + if (strncmp(bp->bp_file, + CONFIG_SYS_BOOTFILE_PREFIX, + strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { +#endif /* CONFIG_SYS_BOOTFILE_PREFIX */ + + debug("TRANSITIONING TO REQUESTING STATE\n"); + dhcp_state = REQUESTING; + + if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) + DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); + + NetSetTimeout(TIMEOUT, BootpTimeout); + DhcpSendRequestPkt(bp); +#ifdef CONFIG_SYS_BOOTFILE_PREFIX + } +#endif /* CONFIG_SYS_BOOTFILE_PREFIX */ + + return; + break; + case REQUESTING: + debug("DHCP State: REQUESTING\n"); + + if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { + char *s; + + if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) + DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); + BootpCopyNetParams(bp); /* Store net params from reply */ + dhcp_state = BOUND; + printf ("DHCP client bound to address %pI4\n", &NetOurIP); + + /* Obey the 'autoload' setting */ + if ((s = getenv("autoload")) != NULL) { + if (*s == 'n') { + /* + * Just use BOOTP to configure system; + * Do not use TFTP to load the bootfile. + */ + NetState = NETLOOP_SUCCESS; + return; +#if defined(CONFIG_CMD_NFS) + } else if (strcmp(s, "NFS") == 0) { + /* + * Use NFS to load the bootfile. + */ + NfsStart(); + return; +#endif + } + } + TftpStart(); + return; + } + break; + case BOUND: + /* DHCP client bound to address */ + break; + default: + puts ("DHCP: INVALID STATE\n"); + break; + } + +} + +void DhcpRequest(void) +{ + BootpRequest(); +} +#endif /* CONFIG_CMD_DHCP */ |