diff options
Diffstat (limited to 'qemu/roms/u-boot/net/bootp.c')
| -rw-r--r-- | qemu/roms/u-boot/net/bootp.c | 963 |
1 files changed, 963 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/net/bootp.c b/qemu/roms/u-boot/net/bootp.c new file mode 100644 index 000000000..189a00383 --- /dev/null +++ b/qemu/roms/u-boot/net/bootp.c @@ -0,0 +1,963 @@ +/* + * 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 +#ifdef CONFIG_BOOTP_RANDOM_DELAY +#include "net_rand.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; + +#if defined(CONFIG_CMD_DHCP) +static dhcp_state_t dhcp_state = INIT; +static unsigned long dhcp_leasetime; +static IPaddr_t NetDHCPServerIP; +static void DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, 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 +#endif + +static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) +{ + struct Bootp_t *bp = (struct Bootp_t *) pkt; + int retval = 0; + + if (dest != PORT_BOOTPC || src != PORT_BOOTPS) + retval = -1; + else if (len < sizeof(struct Bootp_t) - OPT_FIELD_SIZE) + retval = -2; + else if (bp->bp_op != OP_BOOTREQUEST && + bp->bp_op != OP_BOOTREPLY && + bp->bp_op != DHCP_OFFER && + bp->bp_op != DHCP_ACK && + bp->bp_op != DHCP_NAK) + retval = -3; + else if (bp->bp_htype != HWT_ETHER) + retval = -4; + else if (bp->bp_hlen != HWL_ETHER) + retval = -5; + else if (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(struct Bootp_t *bp) +{ +#if !defined(CONFIG_BOOTP_SERVERIP) + IPaddr_t tmp_ip; + + NetCopyIP(&tmp_ip, &bp->bp_siaddr); + if (tmp_ip != 0) + NetCopyIP(&NetServerIP, &bp->bp_siaddr); + memcpy(NetServerEther, ((struct ethernet_hdr *)NetRxPacket)->et_src, 6); +#endif + NetCopyIP(&NetOurIP, &bp->bp_yiaddr); + 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; +#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) + case 42: /* NTP server IP */ + NetCopyIP(&NetNtpServerIP, (IPaddr_t *) (ext + 2)); + break; +#endif + /* 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); + +#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) + if (NetNtpServerIP) + debug("NetNtpServerIP : %pI4\n", &NetNtpServerIP); +#endif +} + +/* + * Handle a BOOTP received packet. + */ +static void +BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, + unsigned len) +{ + struct Bootp_t *bp; + + debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", + src, dest, len, sizeof(struct Bootp_t)); + + bp = (struct Bootp_t *)pkt; + + /* Filter out pkts we don't want */ + if (BootpCheckPkt(pkt, dest, src, len)) + return; + + /* + * Got a good BOOTP reply. Copy the data into our variables. + */ +#ifdef CONFIG_STATUS_LED + status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF); +#endif + + BootpCopyNetParams(bp); /* Store net parameters from reply */ + + /* Retrieve extended information (we must parse the vendor area) */ + if (NetReadLong((ulong *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) + BootpVendorProcess((uchar *)&bp->bp_vend[4], len); + + NetSetTimeout(0, (thand_f *)0); + bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop"); + + debug("Got good BOOTP\n"); + + net_auto_load(); +} +#endif + +/* + * Timeout on BOOTP/DHCP request. + */ +static void +BootpTimeout(void) +{ + if (BootpTry >= TIMEOUT_COUNT) { +#ifdef CONFIG_BOOTP_MAY_FAIL + puts("\nRetry count exceeded\n"); + net_set_state(NETLOOP_FAIL); +#else + puts("\nRetry count exceeded; starting again\n"); + NetStartAgain(); +#endif + } else { + NetSetTimeout(TIMEOUT, BootpTimeout); + BootpRequest(); + } +} + +#define put_vci(e, str) \ + do { \ + size_t vci_strlen = strlen(str); \ + *e++ = 60; /* Vendor Class Identifier */ \ + *e++ = vci_strlen; \ + memcpy(e, str, vci_strlen); \ + e += vci_strlen; \ + } while (0) + +/* + * 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_PXE) + char *uuid; + u16 clientarch; +#endif + +#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_FIELD_SIZE) >> 8; + *e++ = (576 - 312 + OPT_FIELD_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) + hostname = getenv("hostname"); + if (hostname) { + int hostnamelen = strlen(hostname); + + *e++ = 12; /* Hostname */ + *e++ = hostnamelen; + memcpy(e, hostname, hostnamelen); + e += hostnamelen; + } +#endif + +#if defined(CONFIG_BOOTP_PXE) + clientarch = CONFIG_BOOTP_PXE_CLIENTARCH; + *e++ = 93; /* Client System Architecture */ + *e++ = 2; + *e++ = (clientarch >> 8) & 0xff; + *e++ = clientarch & 0xff; + + *e++ = 94; /* Client Network Interface Identifier */ + *e++ = 3; + *e++ = 1; /* type field for UNDI */ + *e++ = 0; /* major revision */ + *e++ = 0; /* minor revision */ + + uuid = getenv("pxeuuid"); + + if (uuid) { + if (uuid_str_valid(uuid)) { + *e++ = 97; /* Client Machine Identifier */ + *e++ = 17; + *e++ = 0; /* type 0 - UUID */ + + uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD); + e += 16; + } else { + printf("Invalid pxeuuid: %s\n", uuid); + } + } +#endif + +#ifdef CONFIG_BOOTP_VCI_STRING + put_vci(e, CONFIG_BOOTP_VCI_STRING); +#endif + +#if defined(CONFIG_BOOTP_VENDOREX) + x = dhcp_vendorex_prep(e); + if (x) + 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_FIELD_SIZE) >> 16; + *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff; +#endif + +#if defined(CONFIG_BOOTP_VCI_STRING) || \ + (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)) +#ifdef CONFIG_SPL_BUILD + put_vci(e, CONFIG_SPL_NET_VCI_STRING); +#else + put_vci(e, CONFIG_BOOTP_VCI_STRING); +#endif +#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 +#if defined(CONFIG_BOOTP_NTPSERVER) + *e++ = 42; + *e++ = 4; + e += 4; +#endif + + *e++ = 255; /* End of the list */ + + return e - start; +} +#endif + +void +BootpRequest(void) +{ + uchar *pkt, *iphdr; + struct Bootp_t *bp; + int extlen, pktlen, iplen; + int eth_hdr_size; +#ifdef CONFIG_BOOTP_RANDOM_DELAY + ulong i, rand_ms; +#endif + + bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start"); +#if defined(CONFIG_CMD_DHCP) + dhcp_state = INIT; +#endif + +#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ + if (BootpTry == 0) + srand_mac(); + + if (BootpTry <= 2) /* Start with max 1024 * 1ms */ + rand_ms = rand() >> (22 - BootpTry); + else /* After 3rd BOOTP request max 8192 * 1ms */ + rand_ms = rand() >> 19; + + printf("Random delay: %ld ms...\n", rand_ms); + for (i = 0; i < rand_ms; i++) + udelay(1000); /*Wait 1ms*/ + +#endif /* CONFIG_BOOTP_RANDOM_DELAY */ + + printf("BOOTP broadcast %d\n", ++BootpTry); + pkt = NetTxPacket; + memset((void *)pkt, 0, PKTSIZE); + + eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_IP); + pkt += eth_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. + */ + /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, + sizeof (struct Bootp_t)); */ + iphdr = pkt; /* We need this later for net_set_udp_header() */ + pkt += IP_UDP_HDR_SIZE; + + bp = (struct 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) + extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); +#else + extlen = 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 + */ + iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen; + pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen; + net_set_udp_header(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); + NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); + +#if defined(CONFIG_CMD_DHCP) + dhcp_state = SELECTING; + net_set_udp_handler(DhcpHandler); +#else + net_set_udp_handler(BootpHandler); +#endif + NetSendPacket(NetTxPacket, pktlen); +} + +#if defined(CONFIG_CMD_DHCP) +static void DhcpOptionsProcess(uchar *popt, struct 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; + case 28: /* Ignore Broadcast Address Option */ + 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(struct Bootp_t *bp_offer) +{ + uchar *pkt, *iphdr; + struct Bootp_t *bp; + int pktlen, iplen, extlen; + int eth_hdr_size; + IPaddr_t OfferedIP; + + debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); + pkt = NetTxPacket; + memset((void *)pkt, 0, PKTSIZE); + + eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_IP); + pkt += eth_hdr_size; + + iphdr = pkt; /* We'll need this later to set proper pkt size */ + pkt += IP_UDP_HDR_SIZE; + + bp = (struct 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); + + iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen; + pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen; + net_set_udp_header(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); + +#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY + udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); +#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ + debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); + NetSendPacket(NetTxPacket, pktlen); +} + +/* + * Handle DHCP received packets. + */ +static void +DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, + unsigned len) +{ + struct Bootp_t *bp = (struct Bootp_t *)pkt; + + debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", + src, dest, len, dhcp_state); + + /* Filter out pkts we don't want */ + if (BootpCheckPkt(pkt, dest, src, len)) + 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) { + if (NetReadLong((ulong *)&bp->bp_vend[0]) == + htonl(BOOTP_VENDOR_MAGIC)) + DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); + /* Store net params from reply */ + BootpCopyNetParams(bp); + dhcp_state = BOUND; + printf("DHCP client bound to address %pI4\n", + &NetOurIP); + bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, + "bootp_stop"); + + net_auto_load(); + 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 */ |