| /* |
| * 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 */ |
| |
| /* |
| * The timeout for the initial BOOTP/DHCP request used to be described by a |
| * counter of fixed-length timeout periods. TIMEOUT_COUNT represents |
| * that counter |
| * |
| * Now that the timeout periods are variable (exponential backoff and retry) |
| * we convert the timeout count to the absolute time it would have take to |
| * execute that many retries, and keep sending retry packets until that time |
| * is reached. |
| */ |
| #ifndef CONFIG_NET_RETRY_COUNT |
| # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ |
| #else |
| # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) |
| #endif |
| #define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000) |
| |
| #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 |
| |
| #ifndef CONFIG_BOOTP_ID_CACHE_SIZE |
| #define CONFIG_BOOTP_ID_CACHE_SIZE 4 |
| #endif |
| |
| ulong bootp_ids[CONFIG_BOOTP_ID_CACHE_SIZE]; |
| unsigned int bootp_num_ids; |
| int BootpTry; |
| ulong bootp_start; |
| ulong bootp_timeout; |
| |
| #if defined(CONFIG_CMD_DHCP) |
| static dhcp_state_t dhcp_state = INIT; |
| static unsigned int 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 void bootp_add_id(ulong id) |
| { |
| if (bootp_num_ids >= ARRAY_SIZE(bootp_ids)) { |
| size_t size = sizeof(bootp_ids) - sizeof(id); |
| |
| memmove(bootp_ids, &bootp_ids[1], size); |
| bootp_ids[bootp_num_ids - 1] = id; |
| } else { |
| bootp_ids[bootp_num_ids] = id; |
| bootp_num_ids++; |
| } |
| } |
| |
| static bool bootp_match_id(ulong id) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < bootp_num_ids; i++) |
| if (bootp_ids[i] == id) |
| return true; |
| |
| return false; |
| } |
| |
| 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 (!bootp_match_id(NetReadLong((uint *)&bp->bp_id))) |
| 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); |
| 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); |
| #endif |
| NetCopyIP(&NetOurIP, &bp->bp_yiaddr); |
| } |
| |
| 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((uint *)&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) |
| { |
| ulong time_taken = get_timer(bootp_start); |
| |
| if (time_taken >= TIMEOUT_MS) { |
| #ifdef CONFIG_BOOTP_MAY_FAIL |
| puts("\nRetry time exceeded\n"); |
| net_set_state(NETLOOP_FAIL); |
| #else |
| puts("\nRetry time exceeded; starting again\n"); |
| NetStartAgain(); |
| #endif |
| } else { |
| bootp_timeout *= 2; |
| if (bootp_timeout > 2000) |
| bootp_timeout = 2000; |
| NetSetTimeout(bootp_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 BootpReset(void) |
| { |
| bootp_num_ids = 0; |
| BootpTry = 0; |
| bootp_start = get_timer(0); |
| bootp_timeout = 250; |
| } |
| |
| void |
| BootpRequest(void) |
| { |
| uchar *pkt, *iphdr; |
| struct Bootp_t *bp; |
| int extlen, pktlen, iplen; |
| int eth_hdr_size; |
| #ifdef CONFIG_BOOTP_RANDOM_DELAY |
| ulong rand_ms; |
| #endif |
| uint BootpID; |
| |
| 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); |
| mdelay(rand_ms); |
| |
| #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); |
| |
| bootp_add_id(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(bootp_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((uint *)to_ptr, (uint *)(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, (uint *) (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((uint *)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((uint *)&bp->bp_vend[0]) == |
| htonl(BOOTP_VENDOR_MAGIC)) |
| DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); |
| |
| NetSetTimeout(5000, 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((uint *)&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 (%lu ms)\n", |
| &NetOurIP, get_timer(bootp_start)); |
| 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 */ |