2 * Copied from Linux Monitor (LiMon) - Networking.
4 * Copyright 1994 - 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
14 * The user interface supports commands for BOOTP, RARP, and TFTP.
15 * Also, we support ARP internally. Depending on available data,
16 * these interact as follows:
20 * Prerequisites: - own ethernet address
21 * We want: - own IP address
22 * - TFTP server IP address
28 * Prerequisites: - own ethernet address
29 * We want: - own IP address
30 * - TFTP server IP address
35 * Prerequisites: - own ethernet address
37 * - TFTP server IP address
38 * We want: - TFTP server ethernet address
43 * Prerequisites: - own ethernet address
44 * We want: - IP, Netmask, ServerIP, Gateway IP
45 * - bootfilename, lease time
50 * Prerequisites: - own ethernet address
52 * - TFTP server IP address
53 * - TFTP server ethernet address
54 * - name of bootfile (if unknown, we use a default name
55 * derived from our own IP address)
56 * We want: - load the boot file
61 * Prerequisites: - own ethernet address
63 * - name of bootfile (if unknown, we use a default name
64 * derived from our own IP address)
65 * We want: - load the boot file
70 * Prerequisites: - own ethernet address
72 * We want: - network time
83 #ifdef CONFIG_CMD_RARP
87 #ifdef CONFIG_STATUS_LED
88 #include <status_led.h>
91 #if defined(CONFIG_CMD_SNTP)
94 #if defined(CONFIG_CDP_VERSION)
95 #include <timestamp.h>
97 #if defined(CONFIG_CMD_DNS)
101 DECLARE_GLOBAL_DATA_PTR;
103 #ifndef CONFIG_ARP_TIMEOUT
104 /* Milliseconds before trying ARP again */
105 # define ARP_TIMEOUT 5000UL
107 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
111 #ifndef CONFIG_NET_RETRY_COUNT
112 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
114 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
117 /** BOOTP EXTENTIONS **/
119 /* Our subnet mask (0=unknown) */
120 IPaddr_t NetOurSubnetMask;
121 /* Our gateways IP address */
122 IPaddr_t NetOurGatewayIP;
123 /* Our DNS IP address */
124 IPaddr_t NetOurDNSIP;
125 #if defined(CONFIG_BOOTP_DNS2)
126 /* Our 2nd DNS IP address */
127 IPaddr_t NetOurDNS2IP;
130 char NetOurNISDomain[32] = {0,};
132 char NetOurHostName[32] = {0,};
134 char NetOurRootPath[64] = {0,};
135 /* Our bootfile size in blocks */
136 ushort NetBootFileSize;
138 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
142 /** END OF BOOTP EXTENTIONS **/
144 /* The actual transferred size of the bootfile (in bytes) */
145 ulong NetBootFileXferSize;
146 /* Our ethernet address */
147 uchar NetOurEther[6];
148 /* Boot server enet address */
149 uchar NetServerEther[6];
150 /* Our IP addr (0 = unknown) */
152 /* Server IP addr (0 = unknown) */
153 IPaddr_t NetServerIP;
154 /* Current receive packet */
155 volatile uchar *NetRxPacket;
156 /* Current rx packet length */
160 /* Ethernet bcast address */
161 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
162 uchar NetEtherNullAddr[6];
164 void (*push_packet)(volatile void *, int len) = 0;
166 #if defined(CONFIG_CMD_CDP)
167 /* Ethernet bcast address */
168 uchar NetCDPAddr[6] = { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
170 /* Network loop state */
172 /* Tried all network devices */
174 /* Network loop restarted */
175 static int NetRestarted;
176 /* At least one device configured */
177 static int NetDevExists;
179 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
180 /* default is without VLAN */
181 ushort NetOurVLAN = 0xFFFF;
183 ushort NetOurNativeVLAN = 0xFFFF;
188 #if defined(CONFIG_CMD_PING)
189 /* the ip address to ping */
192 static void PingStart(void);
195 #if defined(CONFIG_CMD_CDP)
196 static void CDPStart(void);
199 #if defined(CONFIG_CMD_SNTP)
200 /* NTP server IP address */
201 IPaddr_t NetNtpServerIP;
202 /* offset time from UTC */
206 #ifdef CONFIG_NETCONSOLE
208 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
211 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
214 volatile uchar *NetRxPackets[PKTBUFSRX];
216 /* Current RX packet handler */
217 static rxhand_f *packetHandler;
218 /* Current timeout handler */
219 static thand_f *timeHandler;
220 /* Time base value */
221 static ulong timeStart;
222 /* Current timeout value */
223 static ulong timeDelta;
224 /* THE transmit packet */
225 volatile uchar *NetTxPacket;
227 static int net_check_prereq(proto_t protocol);
229 static int NetTryCount;
231 /**********************************************************************/
233 IPaddr_t NetArpWaitPacketIP;
234 IPaddr_t NetArpWaitReplyIP;
235 /* MAC address of waiting packet's destination */
236 uchar *NetArpWaitPacketMAC;
237 /* THE transmit packet */
238 uchar *NetArpWaitTxPacket;
239 int NetArpWaitTxPacketSize;
240 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
241 ulong NetArpWaitTimerStart;
244 void ArpRequest(void)
250 debug("ARP broadcast %d\n", NetArpWaitTry);
254 pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP);
258 arp->ar_hrd = htons(ARP_ETHER);
259 arp->ar_pro = htons(PROT_IP);
262 arp->ar_op = htons(ARPOP_REQUEST);
265 memcpy(&arp->ar_data[0], NetOurEther, 6);
267 NetWriteIP((uchar *) &arp->ar_data[6], NetOurIP);
268 for (i = 10; i < 16; ++i) {
269 /* dest ET addr = 0 */
273 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
274 (NetOurIP & NetOurSubnetMask)) {
275 if (NetOurGatewayIP == 0) {
276 puts("## Warning: gatewayip needed but not set\n");
277 NetArpWaitReplyIP = NetArpWaitPacketIP;
279 NetArpWaitReplyIP = NetOurGatewayIP;
282 NetArpWaitReplyIP = NetArpWaitPacketIP;
285 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP);
286 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
289 void ArpTimeoutCheck(void)
293 if (!NetArpWaitPacketIP)
298 /* check for arp timeout */
299 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
302 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
303 puts("\nARP Retry count exceeded; starting again\n");
307 NetArpWaitTimerStart = t;
314 NetInitLoop(proto_t protocol)
316 static int env_changed_id;
318 int env_id = get_env_id();
320 /* update only when the environment has changed */
321 if (env_changed_id != env_id) {
322 NetOurIP = getenv_IPaddr("ipaddr");
323 NetCopyIP(&bd->bi_ip_addr, &NetOurIP);
324 NetOurGatewayIP = getenv_IPaddr("gatewayip");
325 NetOurSubnetMask = getenv_IPaddr("netmask");
326 NetServerIP = getenv_IPaddr("serverip");
327 NetOurNativeVLAN = getenv_VLAN("nvlan");
328 NetOurVLAN = getenv_VLAN("vlan");
329 #if defined(CONFIG_CMD_DNS)
330 NetOurDNSIP = getenv_IPaddr("dnsip");
332 env_changed_id = env_id;
338 /**********************************************************************/
340 * Main network processing loop.
344 NetLoop(proto_t protocol)
351 /* XXX problem with bss workaround */
352 NetArpWaitPacketMAC = NULL;
353 NetArpWaitTxPacket = NULL;
354 NetArpWaitPacketIP = 0;
355 NetArpWaitReplyIP = 0;
356 NetArpWaitTxPacket = NULL;
363 * Setup packet buffers, aligned correctly.
365 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
366 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
367 for (i = 0; i < PKTBUFSRX; i++)
368 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
371 if (!NetArpWaitTxPacket) {
372 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
373 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
374 NetArpWaitTxPacketSize = 0;
379 if (eth_init(bd) < 0) {
385 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
387 NetState = NETLOOP_CONTINUE;
390 * Start the ball rolling with the given start function. From
391 * here on, this code is a state machine driven by received
392 * packets and timer events.
394 NetInitLoop(protocol);
396 switch (net_check_prereq(protocol)) {
398 /* network not configured */
403 /* network device not configured */
410 /* always use ARP to get server ethernet address */
413 #ifdef CONFIG_CMD_TFTPSRV
418 #if defined(CONFIG_CMD_DHCP)
422 DhcpRequest(); /* Basically same as BOOTP */
432 #if defined(CONFIG_CMD_RARP)
439 #if defined(CONFIG_CMD_PING)
444 #if defined(CONFIG_CMD_NFS)
449 #if defined(CONFIG_CMD_CDP)
454 #ifdef CONFIG_NETCONSOLE
459 #if defined(CONFIG_CMD_SNTP)
464 #if defined(CONFIG_CMD_DNS)
473 NetBootFileXferSize = 0;
477 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
478 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
479 defined(CONFIG_STATUS_LED) && \
480 defined(STATUS_LED_RED)
482 * Echo the inverted link state to the fault LED.
484 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
485 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
487 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
488 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
489 #endif /* CONFIG_MII, ... */
492 * Main packet reception loop. Loop receiving packets until
493 * someone sets `NetState' to a state that terminates.
497 #ifdef CONFIG_SHOW_ACTIVITY
499 extern void show_activity(int arg);
504 * Check the ethernet for a new packet. The ethernet
505 * receive routine will process it.
510 * Abort if ctrl-c was pressed.
521 * Check for a timeout, and run the timeout handler
524 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
527 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
528 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
529 defined(CONFIG_STATUS_LED) && \
530 defined(STATUS_LED_RED)
532 * Echo the inverted link state to the fault LED.
534 if (miiphy_link(eth_get_dev()->name,
535 CONFIG_SYS_FAULT_MII_ADDR)) {
536 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
538 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
540 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
541 #endif /* CONFIG_MII, ... */
543 timeHandler = (thand_f *)0;
550 case NETLOOP_RESTART:
554 case NETLOOP_SUCCESS:
555 if (NetBootFileXferSize > 0) {
557 printf("Bytes transferred = %ld (%lx hex)\n",
559 NetBootFileXferSize);
560 sprintf(buf, "%lX", NetBootFileXferSize);
561 setenv("filesize", buf);
563 sprintf(buf, "%lX", (unsigned long)load_addr);
564 setenv("fileaddr", buf);
567 return NetBootFileXferSize;
575 /**********************************************************************/
578 startAgainTimeout(void)
580 NetState = NETLOOP_RESTART;
584 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
585 unsigned src, unsigned len)
587 /* Totally ignore the packet */
590 void NetStartAgain(void)
593 int retry_forever = 0;
594 unsigned long retrycnt = 0;
596 nretry = getenv("netretry");
598 if (!strcmp(nretry, "yes"))
600 else if (!strcmp(nretry, "no"))
602 else if (!strcmp(nretry, "once"))
605 retrycnt = simple_strtoul(nretry, NULL, 0);
609 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
611 NetState = NETLOOP_FAIL;
618 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
619 eth_try_another(!NetRestarted);
622 if (NetRestartWrap) {
625 NetSetTimeout(10000UL, startAgainTimeout);
626 NetSetHandler(startAgainHandler);
628 NetState = NETLOOP_FAIL;
631 NetState = NETLOOP_RESTART;
635 /**********************************************************************/
641 NetSetHandler(rxhand_f *f)
648 NetSetTimeout(ulong iv, thand_f *f)
651 timeHandler = (thand_f *)0;
654 timeStart = get_timer(0);
661 NetSendPacket(volatile uchar *pkt, int len)
663 (void) eth_send(pkt, len);
667 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
671 /* convert to new style broadcast */
675 /* if broadcast, make the ether address a broadcast and don't do ARP */
676 if (dest == 0xFFFFFFFF)
677 ether = NetBcastAddr;
680 * if MAC address was not discovered yet, save the packet and do
683 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
685 debug("sending ARP for %08lx\n", dest);
687 NetArpWaitPacketIP = dest;
688 NetArpWaitPacketMAC = ether;
690 pkt = NetArpWaitTxPacket;
691 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
693 NetSetIP(pkt, dest, dport, sport, len);
694 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
695 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
697 /* size of the waiting packet */
698 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
701 /* and do the ARP request */
703 NetArpWaitTimerStart = get_timer(0);
705 return 1; /* waiting */
708 debug("sending UDP to %08lx/%pM\n", dest, ether);
710 pkt = (uchar *)NetTxPacket;
711 pkt += NetSetEther(pkt, ether, PROT_IP);
712 NetSetIP(pkt, dest, dport, sport, len);
713 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
715 return 0; /* transmitted */
718 #if defined(CONFIG_CMD_PING)
719 static ushort PingSeqNo;
728 /* XXX always send arp request */
730 memcpy(mac, NetEtherNullAddr, 6);
732 debug("sending ARP for %08lx\n", NetPingIP);
734 NetArpWaitPacketIP = NetPingIP;
735 NetArpWaitPacketMAC = mac;
737 pkt = NetArpWaitTxPacket;
738 pkt += NetSetEther(pkt, mac, PROT_IP);
740 ip = (volatile IP_t *)pkt;
743 * Construct an IP and ICMP header.
744 * (need to set no fragment bit - XXX)
746 /* IP_HDR_SIZE / 4 (not including UDP) */
749 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
750 ip->ip_id = htons(NetIPID++);
751 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
753 ip->ip_p = 0x01; /* ICMP */
755 /* already in network byte order */
756 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
758 NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
759 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
761 s = &ip->udp_src; /* XXX ICMP starts here */
762 s[0] = htons(0x0800); /* echo-request, code */
763 s[1] = 0; /* checksum */
764 s[2] = 0; /* identifier */
765 s[3] = htons(PingSeqNo++); /* sequence number */
766 s[1] = ~NetCksum((uchar *)s, 8/2);
768 /* size of the waiting packet */
769 NetArpWaitTxPacketSize =
770 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
772 /* and do the ARP request */
774 NetArpWaitTimerStart = get_timer(0);
776 return 1; /* waiting */
783 NetState = NETLOOP_FAIL; /* we did not get the reply */
787 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
790 if (sip != NetPingIP)
793 NetState = NETLOOP_SUCCESS;
796 static void PingStart(void)
798 printf("Using %s device\n", eth_get_name());
799 NetSetTimeout(10000UL, PingTimeout);
800 NetSetHandler(PingHandler);
806 #if defined(CONFIG_CMD_CDP)
808 #define CDP_DEVICE_ID_TLV 0x0001
809 #define CDP_ADDRESS_TLV 0x0002
810 #define CDP_PORT_ID_TLV 0x0003
811 #define CDP_CAPABILITIES_TLV 0x0004
812 #define CDP_VERSION_TLV 0x0005
813 #define CDP_PLATFORM_TLV 0x0006
814 #define CDP_NATIVE_VLAN_TLV 0x000a
815 #define CDP_APPLIANCE_VLAN_TLV 0x000e
816 #define CDP_TRIGGER_TLV 0x000f
817 #define CDP_POWER_CONSUMPTION_TLV 0x0010
818 #define CDP_SYSNAME_TLV 0x0014
819 #define CDP_SYSOBJECT_TLV 0x0015
820 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
822 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
827 ushort CDPNativeVLAN;
828 ushort CDPApplianceVLAN;
830 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20,
833 static ushort CDP_compute_csum(const uchar *buff, ushort len)
842 odd = 1 & (ulong)buff;
852 if (result & 0x80000000)
853 result = (result & 0xFFFF) + (result >> 16);
857 leftover = (signed short)(*(const signed char *)buff);
858 /* CISCO SUCKS big time! (and blows too):
859 * CDP uses the IP checksum algorithm with a twist;
860 * for the last byte it *sign* extends and sums.
862 result = (result & 0xffff0000) |
863 ((result + leftover) & 0x0000ffff);
866 result = (result & 0xFFFF) + (result >> 16);
869 result = ((result >> 8) & 0xff) |
870 ((result & 0xff) << 8);
873 /* add up 16-bit and 17-bit words for 17+c bits */
874 result = (result & 0xffff) + (result >> 16);
875 /* add up 16-bit and 2-bit for 16+c bit */
876 result = (result & 0xffff) + (result >> 16);
878 result = (result & 0xffff) + (result >> 16);
881 csum = ~(ushort)result;
883 /* run time endian detection */
884 if (csum != htons(csum)) /* little endian */
890 int CDPSendTrigger(void)
898 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
899 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
904 et = (Ethernet_t *)pkt;
906 /* NOTE: trigger sent not on any VLAN */
908 /* form ethernet header */
909 memcpy(et->et_dest, NetCDPAddr, 6);
910 memcpy(et->et_src, NetOurEther, 6);
912 pkt += ETHER_HDR_SIZE;
915 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
916 pkt += sizeof(CDP_SNAP_hdr);
919 *pkt++ = 0x02; /* CDP version 2 */
920 *pkt++ = 180; /* TTL */
921 s = (volatile ushort *)pkt;
923 /* checksum (0 for later calculation) */
927 #ifdef CONFIG_CDP_DEVICE_ID
928 *s++ = htons(CDP_DEVICE_ID_TLV);
929 *s++ = htons(CONFIG_CDP_DEVICE_ID);
930 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
931 memcpy((uchar *)s, buf, 16);
935 #ifdef CONFIG_CDP_PORT_ID
936 *s++ = htons(CDP_PORT_ID_TLV);
937 memset(buf, 0, sizeof(buf));
938 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
940 if (len & 1) /* make it even */
942 *s++ = htons(len + 4);
943 memcpy((uchar *)s, buf, len);
947 #ifdef CONFIG_CDP_CAPABILITIES
948 *s++ = htons(CDP_CAPABILITIES_TLV);
950 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
954 #ifdef CONFIG_CDP_VERSION
955 *s++ = htons(CDP_VERSION_TLV);
956 memset(buf, 0, sizeof(buf));
957 strcpy(buf, CONFIG_CDP_VERSION);
959 if (len & 1) /* make it even */
961 *s++ = htons(len + 4);
962 memcpy((uchar *)s, buf, len);
966 #ifdef CONFIG_CDP_PLATFORM
967 *s++ = htons(CDP_PLATFORM_TLV);
968 memset(buf, 0, sizeof(buf));
969 strcpy(buf, CONFIG_CDP_PLATFORM);
971 if (len & 1) /* make it even */
973 *s++ = htons(len + 4);
974 memcpy((uchar *)s, buf, len);
978 #ifdef CONFIG_CDP_TRIGGER
979 *s++ = htons(CDP_TRIGGER_TLV);
981 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
985 #ifdef CONFIG_CDP_POWER_CONSUMPTION
986 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
988 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
991 /* length of ethernet packet */
992 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
993 et->et_protlen = htons(len);
995 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
996 chksum = CDP_compute_csum((uchar *)NetTxPacket + len,
997 (uchar *)s - (NetTxPacket + len));
1000 *cp = htons(chksum);
1002 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
1012 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1017 /* if not OK try again */
1021 NetState = NETLOOP_SUCCESS;
1025 CDPDummyHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
1032 CDPHandler(const uchar *pkt, unsigned len)
1041 if (len < sizeof(CDP_SNAP_hdr) + 4)
1044 /* check for valid CDP SNAP header */
1045 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1048 pkt += sizeof(CDP_SNAP_hdr);
1049 len -= sizeof(CDP_SNAP_hdr);
1051 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1052 if (pkt[0] < 0x02 || pkt[1] == 0)
1056 * if version is greater than 0x02 maybe we'll have a problem;
1060 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1063 if (CDP_compute_csum(pkt, len) != 0)
1075 ss = (const ushort *)pkt;
1076 type = ntohs(ss[0]);
1077 tlen = ntohs(ss[1]);
1084 ss += 2; /* point ss to the data of the TLV */
1088 case CDP_DEVICE_ID_TLV:
1090 case CDP_ADDRESS_TLV:
1092 case CDP_PORT_ID_TLV:
1094 case CDP_CAPABILITIES_TLV:
1096 case CDP_VERSION_TLV:
1098 case CDP_PLATFORM_TLV:
1100 case CDP_NATIVE_VLAN_TLV:
1103 case CDP_APPLIANCE_VLAN_TLV:
1104 t = (const uchar *)ss;
1110 ss = (const ushort *)(t + 1);
1112 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1113 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1116 /* XXX will this work; dunno */
1122 case CDP_TRIGGER_TLV:
1124 case CDP_POWER_CONSUMPTION_TLV:
1126 case CDP_SYSNAME_TLV:
1128 case CDP_SYSOBJECT_TLV:
1130 case CDP_MANAGEMENT_ADDRESS_TLV:
1135 CDPApplianceVLAN = vlan;
1136 CDPNativeVLAN = nvlan;
1142 printf("** CDP packet is too short\n");
1146 static void CDPStart(void)
1148 printf("Using %s device\n", eth_get_name());
1152 CDPNativeVLAN = htons(-1);
1153 CDPApplianceVLAN = htons(-1);
1155 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1156 NetSetHandler(CDPDummyHandler);
1162 #ifdef CONFIG_IP_DEFRAG
1164 * This function collects fragments in a single packet, according
1165 * to the algorithm in RFC815. It returns NULL or the pointer to
1166 * a complete packet, in static storage
1168 #ifndef CONFIG_NET_MAXDEFRAG
1169 #define CONFIG_NET_MAXDEFRAG 16384
1172 * MAXDEFRAG, above, is chosen in the config file and is real data
1173 * so we need to add the NFS overhead, which is more than TFTP.
1174 * To use sizeof in the internal unnamed structures, we need a real
1175 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1176 * The compiler doesn't complain nor allocates the actual structure
1178 static struct rpc_t rpc_specimen;
1179 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1181 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1184 * this is the packet being assembled, either data or frag control.
1185 * Fragments go by 8 bytes, so this union must be 8 bytes long
1188 /* first_byte is address of this structure */
1189 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1190 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1191 u16 prev_hole; /* index of prev, 0 == none */
1195 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1197 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1198 static u16 first_hole, total_len;
1199 struct hole *payload, *thisfrag, *h, *newh;
1200 IP_t *localip = (IP_t *)pkt_buff;
1201 uchar *indata = (uchar *)ip;
1202 int offset8, start, len, done = 0;
1203 u16 ip_off = ntohs(ip->ip_off);
1205 /* payload starts after IP header, this fragment is in there */
1206 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1207 offset8 = (ip_off & IP_OFFS);
1208 thisfrag = payload + offset8;
1209 start = offset8 * 8;
1210 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1212 if (start + len > IP_MAXUDP) /* fragment extends too far */
1215 if (!total_len || localip->ip_id != ip->ip_id) {
1216 /* new (or different) packet, reset structs */
1218 payload[0].last_byte = ~0;
1219 payload[0].next_hole = 0;
1220 payload[0].prev_hole = 0;
1222 /* any IP header will work, copy the first we received */
1223 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1227 * What follows is the reassembly algorithm. We use the payload
1228 * array as a linked list of hole descriptors, as each hole starts
1229 * at a multiple of 8 bytes. However, last byte can be whatever value,
1230 * so it is represented as byte count, not as 8-byte blocks.
1233 h = payload + first_hole;
1234 while (h->last_byte < start) {
1235 if (!h->next_hole) {
1236 /* no hole that far away */
1239 h = payload + h->next_hole;
1242 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1243 if (offset8 + ((len + 7) / 8) <= h - payload) {
1244 /* no overlap with holes (dup fragment?) */
1248 if (!(ip_off & IP_FLAGS_MFRAG)) {
1249 /* no more fragmentss: truncate this (last) hole */
1250 total_len = start + len;
1251 h->last_byte = start + len;
1255 * There is some overlap: fix the hole list. This code doesn't
1256 * deal with a fragment that overlaps with two different holes
1257 * (thus being a superset of a previously-received fragment).
1260 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
1261 /* complete overlap with hole: remove hole */
1262 if (!h->prev_hole && !h->next_hole) {
1263 /* last remaining hole */
1265 } else if (!h->prev_hole) {
1267 first_hole = h->next_hole;
1268 payload[h->next_hole].prev_hole = 0;
1269 } else if (!h->next_hole) {
1271 payload[h->prev_hole].next_hole = 0;
1273 /* in the middle of the list */
1274 payload[h->next_hole].prev_hole = h->prev_hole;
1275 payload[h->prev_hole].next_hole = h->next_hole;
1278 } else if (h->last_byte <= start + len) {
1279 /* overlaps with final part of the hole: shorten this hole */
1280 h->last_byte = start;
1282 } else if (h >= thisfrag) {
1283 /* overlaps with initial part of the hole: move this hole */
1284 newh = thisfrag + (len / 8);
1288 payload[h->next_hole].prev_hole = (h - payload);
1290 payload[h->prev_hole].next_hole = (h - payload);
1292 first_hole = (h - payload);
1295 /* fragment sits in the middle: split the hole */
1296 newh = thisfrag + (len / 8);
1298 h->last_byte = start;
1299 h->next_hole = (newh - payload);
1300 newh->prev_hole = (h - payload);
1301 if (newh->next_hole)
1302 payload[newh->next_hole].prev_hole = (newh - payload);
1305 /* finally copy this fragment and possibly return whole packet */
1306 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1310 localip->ip_len = htons(total_len);
1311 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1315 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1317 u16 ip_off = ntohs(ip->ip_off);
1318 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1319 return ip; /* not a fragment */
1320 return __NetDefragment(ip, lenp);
1323 #else /* !CONFIG_IP_DEFRAG */
1325 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1327 u16 ip_off = ntohs(ip->ip_off);
1328 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1329 return ip; /* not a fragment */
1335 NetReceive(volatile uchar *inpkt, int len)
1344 #if defined(CONFIG_CMD_CDP)
1347 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1349 debug("packet received\n");
1351 NetRxPacket = inpkt;
1352 NetRxPacketLen = len;
1353 et = (Ethernet_t *)inpkt;
1355 /* too small packet? */
1356 if (len < ETHER_HDR_SIZE)
1361 (*push_packet)(inpkt, len);
1366 #if defined(CONFIG_CMD_CDP)
1367 /* keep track if packet is CDP */
1368 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1371 myvlanid = ntohs(NetOurVLAN);
1372 if (myvlanid == (ushort)-1)
1373 myvlanid = VLAN_NONE;
1374 mynvlanid = ntohs(NetOurNativeVLAN);
1375 if (mynvlanid == (ushort)-1)
1376 mynvlanid = VLAN_NONE;
1378 x = ntohs(et->et_protlen);
1380 debug("packet received\n");
1384 * Got a 802 packet. Check the other protocol field.
1386 x = ntohs(et->et_prot);
1388 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1389 len -= E802_HDR_SIZE;
1391 } else if (x != PROT_VLAN) { /* normal packet */
1392 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1393 len -= ETHER_HDR_SIZE;
1395 } else { /* VLAN packet */
1396 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1398 debug("VLAN packet received\n");
1400 /* too small packet? */
1401 if (len < VLAN_ETHER_HDR_SIZE)
1404 /* if no VLAN active */
1405 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1406 #if defined(CONFIG_CMD_CDP)
1412 cti = ntohs(vet->vet_tag);
1413 vlanid = cti & VLAN_IDMASK;
1414 x = ntohs(vet->vet_type);
1416 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1417 len -= VLAN_ETHER_HDR_SIZE;
1420 debug("Receive from protocol 0x%x\n", x);
1422 #if defined(CONFIG_CMD_CDP)
1424 CDPHandler((uchar *)ip, len);
1429 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1430 if (vlanid == VLAN_NONE)
1431 vlanid = (mynvlanid & VLAN_IDMASK);
1433 if (vlanid != (myvlanid & VLAN_IDMASK))
1441 * We have to deal with two types of ARP packets:
1442 * - REQUEST packets will be answered by sending our
1443 * IP address - if we know it.
1444 * - REPLY packates are expected only after we asked
1445 * for the TFTP server's or the gateway's ethernet
1446 * address; so if we receive such a packet, we set
1447 * the server ethernet address
1452 if (len < ARP_HDR_SIZE) {
1453 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1456 if (ntohs(arp->ar_hrd) != ARP_ETHER)
1458 if (ntohs(arp->ar_pro) != PROT_IP)
1460 if (arp->ar_hln != 6)
1462 if (arp->ar_pln != 4)
1468 if (NetReadIP(&arp->ar_data[16]) != NetOurIP)
1471 switch (ntohs(arp->ar_op)) {
1473 /* reply with our IP address */
1474 debug("Got ARP REQUEST, return our IP\n");
1476 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1477 arp->ar_op = htons(ARPOP_REPLY);
1478 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6);
1479 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1480 memcpy(&arp->ar_data[0], NetOurEther, 6);
1481 NetCopyIP(&arp->ar_data[6], &NetOurIP);
1482 (void) eth_send((uchar *)et,
1483 (pkt - (uchar *)et) + ARP_HDR_SIZE);
1486 case ARPOP_REPLY: /* arp reply */
1487 /* are we waiting for a reply */
1488 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1491 #ifdef CONFIG_KEEP_SERVERADDR
1492 if (NetServerIP == NetArpWaitPacketIP) {
1494 sprintf(buf, "%pM", arp->ar_data);
1495 setenv("serveraddr", buf);
1499 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1502 tmp = NetReadIP(&arp->ar_data[6]);
1504 /* matched waiting packet's address */
1505 if (tmp == NetArpWaitReplyIP) {
1507 /* save address for later use */
1508 memcpy(NetArpWaitPacketMAC,
1509 &arp->ar_data[0], 6);
1511 #ifdef CONFIG_NETCONSOLE
1512 (*packetHandler)(0, 0, 0, 0, 0);
1514 /* modify header, and transmit it */
1515 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1516 (void) eth_send(NetArpWaitTxPacket,
1517 NetArpWaitTxPacketSize);
1519 /* no arp request pending now */
1520 NetArpWaitPacketIP = 0;
1521 NetArpWaitTxPacketSize = 0;
1522 NetArpWaitPacketMAC = NULL;
1527 debug("Unexpected ARP opcode 0x%x\n",
1533 #ifdef CONFIG_CMD_RARP
1535 debug("Got RARP\n");
1537 if (len < ARP_HDR_SIZE) {
1538 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1542 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1543 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1544 (ntohs(arp->ar_pro) != PROT_IP) ||
1545 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1547 puts("invalid RARP header\n");
1549 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1550 if (NetServerIP == 0)
1551 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1552 memcpy(NetServerEther, &arp->ar_data[0], 6);
1554 (*packetHandler)(0, 0, 0, 0, 0);
1560 /* Before we start poking the header, make sure it is there */
1561 if (len < IP_HDR_SIZE) {
1562 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1565 /* Check the packet length */
1566 if (len < ntohs(ip->ip_len)) {
1567 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1570 len = ntohs(ip->ip_len);
1571 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1573 /* Can't deal with anything except IPv4 */
1574 if ((ip->ip_hl_v & 0xf0) != 0x40)
1576 /* Can't deal with IP options (headers != 20 bytes) */
1577 if ((ip->ip_hl_v & 0x0f) > 0x05)
1579 /* Check the Checksum of the header */
1580 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1581 puts("checksum bad\n");
1584 /* If it is not for us, ignore it */
1585 tmp = NetReadIP(&ip->ip_dst);
1586 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1587 #ifdef CONFIG_MCAST_TFTP
1588 if (Mcast_addr != tmp)
1592 /* Read source IP address for later use */
1593 src_ip = NetReadIP(&ip->ip_src);
1595 * The function returns the unchanged packet if it's not
1596 * a fragment, and either the complete packet or NULL if
1597 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1599 ip = NetDefragment(ip, &len);
1603 * watch for ICMP host redirects
1605 * There is no real handler code (yet). We just watch
1606 * for ICMP host redirect messages. In case anybody
1607 * sees these messages: please contact me
1608 * (wd@denx.de), or - even better - send me the
1609 * necessary fixes :-)
1611 * Note: in all cases where I have seen this so far
1612 * it was a problem with the router configuration,
1613 * for instance when a router was configured in the
1614 * BOOTP reply, but the TFTP server was on the same
1615 * subnet. So this is probably a warning that your
1616 * configuration might be wrong. But I'm not really
1617 * sure if there aren't any other situations.
1619 if (ip->ip_p == IPPROTO_ICMP) {
1620 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1622 switch (icmph->type) {
1624 if (icmph->code != ICMP_REDIR_HOST)
1626 printf(" ICMP Host Redirect to %pI4 ",
1627 &icmph->un.gateway);
1629 #if defined(CONFIG_CMD_PING)
1630 case ICMP_ECHO_REPLY:
1632 * IP header OK. Pass the packet to the
1635 /* XXX point to ip packet */
1636 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1638 case ICMP_ECHO_REQUEST:
1639 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
1640 ETHER_HDR_SIZE + len);
1642 memcpy(&et->et_dest[0], &et->et_src[0], 6);
1643 memcpy(&et->et_src[0], NetOurEther, 6);
1647 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
1648 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1649 ip->ip_sum = ~NetCksum((uchar *)ip,
1650 IP_HDR_SIZE_NO_UDP >> 1);
1652 icmph->type = ICMP_ECHO_REPLY;
1653 icmph->checksum = 0;
1654 icmph->checksum = ~NetCksum((uchar *)icmph,
1655 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1656 (void) eth_send((uchar *)et,
1657 ETHER_HDR_SIZE + len);
1663 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1667 #ifdef CONFIG_UDP_CHECKSUM
1668 if (ip->udp_xsum != 0) {
1674 xsum += (ntohs(ip->udp_len));
1675 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1676 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1677 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1678 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1680 sumlen = ntohs(ip->udp_len);
1681 sumptr = (ushort *) &(ip->udp_src);
1683 while (sumlen > 1) {
1686 sumdata = *sumptr++;
1687 xsum += ntohs(sumdata);
1693 sumdata = *(unsigned char *) sumptr;
1694 sumdata = (sumdata << 8) & 0xff00;
1697 while ((xsum >> 16) != 0) {
1698 xsum = (xsum & 0x0000ffff) +
1699 ((xsum >> 16) & 0x0000ffff);
1701 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1702 printf(" UDP wrong checksum %08lx %08x\n",
1703 xsum, ntohs(ip->udp_xsum));
1710 #ifdef CONFIG_NETCONSOLE
1711 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1714 ntohs(ip->udp_len) - 8);
1717 * IP header OK. Pass the packet to the current handler.
1719 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1723 ntohs(ip->udp_len) - 8);
1729 /**********************************************************************/
1731 static int net_check_prereq(proto_t protocol)
1735 #if defined(CONFIG_CMD_PING)
1737 if (NetPingIP == 0) {
1738 puts("*** ERROR: ping address not given\n");
1743 #if defined(CONFIG_CMD_SNTP)
1745 if (NetNtpServerIP == 0) {
1746 puts("*** ERROR: NTP server address not given\n");
1751 #if defined(CONFIG_CMD_DNS)
1753 if (NetOurDNSIP == 0) {
1754 puts("*** ERROR: DNS server address not given\n");
1759 #if defined(CONFIG_CMD_NFS)
1763 if (NetServerIP == 0) {
1764 puts("*** ERROR: `serverip' not set\n");
1767 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1768 defined(CONFIG_CMD_DNS)
1775 if (NetOurIP == 0) {
1776 puts("*** ERROR: `ipaddr' not set\n");
1781 #ifdef CONFIG_CMD_RARP
1787 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1788 extern int eth_get_dev_index(void);
1789 int num = eth_get_dev_index();
1793 puts("*** ERROR: No ethernet found.\n");
1796 puts("*** ERROR: `ethaddr' not set\n");
1799 printf("*** ERROR: `eth%daddr' not set\n",
1813 /**********************************************************************/
1816 NetCksumOk(uchar *ptr, int len)
1818 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1823 NetCksum(uchar *ptr, int len)
1826 ushort *p = (ushort *)ptr;
1831 xsum = (xsum & 0xffff) + (xsum >> 16);
1832 xsum = (xsum & 0xffff) + (xsum >> 16);
1833 return xsum & 0xffff;
1841 myvlanid = ntohs(NetOurVLAN);
1842 if (myvlanid == (ushort)-1)
1843 myvlanid = VLAN_NONE;
1845 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1846 VLAN_ETHER_HDR_SIZE;
1850 NetSetEther(volatile uchar *xet, uchar * addr, uint prot)
1852 Ethernet_t *et = (Ethernet_t *)xet;
1855 myvlanid = ntohs(NetOurVLAN);
1856 if (myvlanid == (ushort)-1)
1857 myvlanid = VLAN_NONE;
1859 memcpy(et->et_dest, addr, 6);
1860 memcpy(et->et_src, NetOurEther, 6);
1861 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1862 et->et_protlen = htons(prot);
1863 return ETHER_HDR_SIZE;
1865 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1867 vet->vet_vlan_type = htons(PROT_VLAN);
1868 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1869 vet->vet_type = htons(prot);
1870 return VLAN_ETHER_HDR_SIZE;
1875 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len)
1877 IP_t *ip = (IP_t *)xip;
1880 * If the data is an odd number of bytes, zero the
1881 * byte after the last byte so that the checksum
1885 xip[IP_HDR_SIZE + len] = 0;
1888 * Construct an IP and UDP header.
1889 * (need to set no fragment bit - XXX)
1891 /* IP_HDR_SIZE / 4 (not including UDP) */
1894 ip->ip_len = htons(IP_HDR_SIZE + len);
1895 ip->ip_id = htons(NetIPID++);
1896 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1898 ip->ip_p = 17; /* UDP */
1900 /* already in network byte order */
1901 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1903 NetCopyIP((void *)&ip->ip_dst, &dest);
1904 ip->udp_src = htons(sport);
1905 ip->udp_dst = htons(dport);
1906 ip->udp_len = htons(8 + len);
1908 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1911 void copy_filename(char *dst, const char *src, int size)
1913 if (*src && (*src == '"')) {
1918 while ((--size > 0) && *src && (*src != '"'))
1923 #if defined(CONFIG_CMD_NFS) || \
1924 defined(CONFIG_CMD_SNTP) || \
1925 defined(CONFIG_CMD_DNS)
1927 * make port a little random (1024-17407)
1928 * This keeps the math somewhat trivial to compute, and seems to work with
1929 * all supported protocols/clients/servers
1931 unsigned int random_port(void)
1933 return 1024 + (get_timer(0) % 0x4000);
1937 void ip_to_string(IPaddr_t x, char *s)
1940 sprintf(s, "%d.%d.%d.%d",
1941 (int) ((x >> 24) & 0xff),
1942 (int) ((x >> 16) & 0xff),
1943 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1947 void VLAN_to_string(ushort x, char *s)
1951 if (x == (ushort)-1)
1957 sprintf(s, "%d", x & VLAN_IDMASK);
1960 ushort string_to_VLAN(const char *s)
1965 return htons(VLAN_NONE);
1967 if (*s < '0' || *s > '9')
1970 id = (ushort)simple_strtoul(s, NULL, 10);
1975 ushort getenv_VLAN(char *var)
1977 return string_to_VLAN(getenv(var));