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 #ifdef CONFIG_CMD_TFTPPUT
219 static rxhand_icmp_f *packet_icmp_handler; /* Current ICMP rx handler */
221 /* Current timeout handler */
222 static thand_f *timeHandler;
223 /* Time base value */
224 static ulong timeStart;
225 /* Current timeout value */
226 static ulong timeDelta;
227 /* THE transmit packet */
228 volatile uchar *NetTxPacket;
230 static int net_check_prereq(enum proto_t protocol);
232 static int NetTryCount;
234 /**********************************************************************/
236 IPaddr_t NetArpWaitPacketIP;
237 IPaddr_t NetArpWaitReplyIP;
238 /* MAC address of waiting packet's destination */
239 uchar *NetArpWaitPacketMAC;
240 /* THE transmit packet */
241 uchar *NetArpWaitTxPacket;
242 int NetArpWaitTxPacketSize;
243 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
244 ulong NetArpWaitTimerStart;
247 void ArpRequest(void)
252 debug("ARP broadcast %d\n", NetArpWaitTry);
256 pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP);
260 arp->ar_hrd = htons(ARP_ETHER);
261 arp->ar_pro = htons(PROT_IP);
264 arp->ar_op = htons(ARPOP_REQUEST);
267 memcpy(&arp->ar_data[0], NetOurEther, 6);
269 NetWriteIP((uchar *) &arp->ar_data[6], NetOurIP);
270 /* dest ET addr = 0 */
271 memset(&arp->ar_data[10], '\0', 6);
272 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
273 (NetOurIP & NetOurSubnetMask)) {
274 if (NetOurGatewayIP == 0) {
275 puts("## Warning: gatewayip needed but not set\n");
276 NetArpWaitReplyIP = NetArpWaitPacketIP;
278 NetArpWaitReplyIP = NetOurGatewayIP;
281 NetArpWaitReplyIP = NetArpWaitPacketIP;
284 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP);
285 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
288 void ArpTimeoutCheck(void)
292 if (!NetArpWaitPacketIP)
297 /* check for arp timeout */
298 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
301 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
302 puts("\nARP Retry count exceeded; starting again\n");
306 NetArpWaitTimerStart = t;
312 static void NetInitLoop(enum proto_t protocol)
314 static int env_changed_id;
316 int env_id = get_env_id();
318 /* update only when the environment has changed */
319 if (env_changed_id != env_id) {
320 NetOurIP = getenv_IPaddr("ipaddr");
321 NetCopyIP(&bd->bi_ip_addr, &NetOurIP);
322 NetOurGatewayIP = getenv_IPaddr("gatewayip");
323 NetOurSubnetMask = getenv_IPaddr("netmask");
324 NetServerIP = getenv_IPaddr("serverip");
325 NetOurNativeVLAN = getenv_VLAN("nvlan");
326 NetOurVLAN = getenv_VLAN("vlan");
327 #if defined(CONFIG_CMD_DNS)
328 NetOurDNSIP = getenv_IPaddr("dnsip");
330 env_changed_id = env_id;
336 /**********************************************************************/
338 * Main network processing loop.
341 int NetLoop(enum proto_t protocol)
349 /* XXX problem with bss workaround */
350 NetArpWaitPacketMAC = NULL;
351 NetArpWaitTxPacket = NULL;
352 NetArpWaitPacketIP = 0;
353 NetArpWaitReplyIP = 0;
354 NetArpWaitTxPacket = NULL;
361 * Setup packet buffers, aligned correctly.
363 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
364 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
365 for (i = 0; i < PKTBUFSRX; i++)
366 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
369 if (!NetArpWaitTxPacket) {
370 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
371 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
372 NetArpWaitTxPacketSize = 0;
377 if (eth_init(bd) < 0) {
383 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
385 NetState = NETLOOP_CONTINUE;
388 * Start the ball rolling with the given start function. From
389 * here on, this code is a state machine driven by received
390 * packets and timer events.
392 NetInitLoop(protocol);
394 switch (net_check_prereq(protocol)) {
396 /* network not configured */
401 /* network device not configured */
406 NetBootFileXferSize = 0;
409 #ifdef CONFIG_CMD_TFTPPUT
412 /* always use ARP to get server ethernet address */
415 #ifdef CONFIG_CMD_TFTPSRV
420 #if defined(CONFIG_CMD_DHCP)
424 DhcpRequest(); /* Basically same as BOOTP */
434 #if defined(CONFIG_CMD_RARP)
441 #if defined(CONFIG_CMD_PING)
446 #if defined(CONFIG_CMD_NFS)
451 #if defined(CONFIG_CMD_CDP)
456 #ifdef CONFIG_NETCONSOLE
461 #if defined(CONFIG_CMD_SNTP)
466 #if defined(CONFIG_CMD_DNS)
478 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
479 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
480 defined(CONFIG_STATUS_LED) && \
481 defined(STATUS_LED_RED)
483 * Echo the inverted link state to the fault LED.
485 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
486 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
488 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
489 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
490 #endif /* CONFIG_MII, ... */
493 * Main packet reception loop. Loop receiving packets until
494 * someone sets `NetState' to a state that terminates.
498 #ifdef CONFIG_SHOW_ACTIVITY
500 extern void show_activity(int arg);
505 * Check the ethernet for a new packet. The ethernet
506 * receive routine will process it.
511 * Abort if ctrl-c was pressed.
522 * Check for a timeout, and run the timeout handler
525 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
528 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
529 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
530 defined(CONFIG_STATUS_LED) && \
531 defined(STATUS_LED_RED)
533 * Echo the inverted link state to the fault LED.
535 if (miiphy_link(eth_get_dev()->name,
536 CONFIG_SYS_FAULT_MII_ADDR)) {
537 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
539 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
541 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
542 #endif /* CONFIG_MII, ... */
544 timeHandler = (thand_f *)0;
551 case NETLOOP_RESTART:
555 case NETLOOP_SUCCESS:
556 if (NetBootFileXferSize > 0) {
558 printf("Bytes transferred = %ld (%lx hex)\n",
560 NetBootFileXferSize);
561 sprintf(buf, "%lX", NetBootFileXferSize);
562 setenv("filesize", buf);
564 sprintf(buf, "%lX", (unsigned long)load_addr);
565 setenv("fileaddr", buf);
568 ret = NetBootFileXferSize;
577 #ifdef CONFIG_CMD_TFTPPUT
578 /* Clear out the handlers */
580 net_set_icmp_handler(NULL);
585 /**********************************************************************/
588 startAgainTimeout(void)
590 NetState = NETLOOP_RESTART;
594 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
595 unsigned src, unsigned len)
597 /* Totally ignore the packet */
600 void NetStartAgain(void)
603 int retry_forever = 0;
604 unsigned long retrycnt = 0;
606 nretry = getenv("netretry");
608 if (!strcmp(nretry, "yes"))
610 else if (!strcmp(nretry, "no"))
612 else if (!strcmp(nretry, "once"))
615 retrycnt = simple_strtoul(nretry, NULL, 0);
619 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
621 NetState = NETLOOP_FAIL;
628 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
629 eth_try_another(!NetRestarted);
632 if (NetRestartWrap) {
635 NetSetTimeout(10000UL, startAgainTimeout);
636 NetSetHandler(startAgainHandler);
638 NetState = NETLOOP_FAIL;
641 NetState = NETLOOP_RESTART;
645 /**********************************************************************/
651 NetSetHandler(rxhand_f *f)
656 #ifdef CONFIG_CMD_TFTPPUT
657 void net_set_icmp_handler(rxhand_icmp_f *f)
659 packet_icmp_handler = f;
664 NetSetTimeout(ulong iv, thand_f *f)
667 timeHandler = (thand_f *)0;
670 timeStart = get_timer(0);
677 NetSendPacket(volatile uchar *pkt, int len)
679 (void) eth_send(pkt, len);
683 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
687 /* convert to new style broadcast */
691 /* if broadcast, make the ether address a broadcast and don't do ARP */
692 if (dest == 0xFFFFFFFF)
693 ether = NetBcastAddr;
696 * if MAC address was not discovered yet, save the packet and do
699 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
701 debug("sending ARP for %08lx\n", dest);
703 NetArpWaitPacketIP = dest;
704 NetArpWaitPacketMAC = ether;
706 pkt = NetArpWaitTxPacket;
707 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
709 NetSetIP(pkt, dest, dport, sport, len);
710 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
711 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
713 /* size of the waiting packet */
714 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
717 /* and do the ARP request */
719 NetArpWaitTimerStart = get_timer(0);
721 return 1; /* waiting */
724 debug("sending UDP to %08lx/%pM\n", dest, ether);
726 pkt = (uchar *)NetTxPacket;
727 pkt += NetSetEther(pkt, ether, PROT_IP);
728 NetSetIP(pkt, dest, dport, sport, len);
729 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
731 return 0; /* transmitted */
734 #if defined(CONFIG_CMD_PING)
735 static ushort PingSeqNo;
744 /* XXX always send arp request */
746 memcpy(mac, NetEtherNullAddr, 6);
748 debug("sending ARP for %08lx\n", NetPingIP);
750 NetArpWaitPacketIP = NetPingIP;
751 NetArpWaitPacketMAC = mac;
753 pkt = NetArpWaitTxPacket;
754 pkt += NetSetEther(pkt, mac, PROT_IP);
756 ip = (volatile IP_t *)pkt;
759 * Construct an IP and ICMP header.
760 * (need to set no fragment bit - XXX)
762 /* IP_HDR_SIZE / 4 (not including UDP) */
765 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
766 ip->ip_id = htons(NetIPID++);
767 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
769 ip->ip_p = 0x01; /* ICMP */
771 /* already in network byte order */
772 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
774 NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
775 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
777 s = &ip->udp_src; /* XXX ICMP starts here */
778 s[0] = htons(0x0800); /* echo-request, code */
779 s[1] = 0; /* checksum */
780 s[2] = 0; /* identifier */
781 s[3] = htons(PingSeqNo++); /* sequence number */
782 s[1] = ~NetCksum((uchar *)s, 8/2);
784 /* size of the waiting packet */
785 NetArpWaitTxPacketSize =
786 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
788 /* and do the ARP request */
790 NetArpWaitTimerStart = get_timer(0);
792 return 1; /* waiting */
799 NetState = NETLOOP_FAIL; /* we did not get the reply */
803 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
806 if (sip != NetPingIP)
809 NetState = NETLOOP_SUCCESS;
812 static void PingStart(void)
814 printf("Using %s device\n", eth_get_name());
815 NetSetTimeout(10000UL, PingTimeout);
816 NetSetHandler(PingHandler);
822 #if defined(CONFIG_CMD_CDP)
824 #define CDP_DEVICE_ID_TLV 0x0001
825 #define CDP_ADDRESS_TLV 0x0002
826 #define CDP_PORT_ID_TLV 0x0003
827 #define CDP_CAPABILITIES_TLV 0x0004
828 #define CDP_VERSION_TLV 0x0005
829 #define CDP_PLATFORM_TLV 0x0006
830 #define CDP_NATIVE_VLAN_TLV 0x000a
831 #define CDP_APPLIANCE_VLAN_TLV 0x000e
832 #define CDP_TRIGGER_TLV 0x000f
833 #define CDP_POWER_CONSUMPTION_TLV 0x0010
834 #define CDP_SYSNAME_TLV 0x0014
835 #define CDP_SYSOBJECT_TLV 0x0015
836 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
838 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
843 ushort CDPNativeVLAN;
844 ushort CDPApplianceVLAN;
846 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20,
849 static ushort CDP_compute_csum(const uchar *buff, ushort len)
858 odd = 1 & (ulong)buff;
868 if (result & 0x80000000)
869 result = (result & 0xFFFF) + (result >> 16);
873 leftover = (signed short)(*(const signed char *)buff);
874 /* CISCO SUCKS big time! (and blows too):
875 * CDP uses the IP checksum algorithm with a twist;
876 * for the last byte it *sign* extends and sums.
878 result = (result & 0xffff0000) |
879 ((result + leftover) & 0x0000ffff);
882 result = (result & 0xFFFF) + (result >> 16);
885 result = ((result >> 8) & 0xff) |
886 ((result & 0xff) << 8);
889 /* add up 16-bit and 17-bit words for 17+c bits */
890 result = (result & 0xffff) + (result >> 16);
891 /* add up 16-bit and 2-bit for 16+c bit */
892 result = (result & 0xffff) + (result >> 16);
894 result = (result & 0xffff) + (result >> 16);
897 csum = ~(ushort)result;
899 /* run time endian detection */
900 if (csum != htons(csum)) /* little endian */
906 int CDPSendTrigger(void)
914 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
915 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
920 et = (Ethernet_t *)pkt;
922 /* NOTE: trigger sent not on any VLAN */
924 /* form ethernet header */
925 memcpy(et->et_dest, NetCDPAddr, 6);
926 memcpy(et->et_src, NetOurEther, 6);
928 pkt += ETHER_HDR_SIZE;
931 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
932 pkt += sizeof(CDP_SNAP_hdr);
935 *pkt++ = 0x02; /* CDP version 2 */
936 *pkt++ = 180; /* TTL */
937 s = (volatile ushort *)pkt;
939 /* checksum (0 for later calculation) */
943 #ifdef CONFIG_CDP_DEVICE_ID
944 *s++ = htons(CDP_DEVICE_ID_TLV);
945 *s++ = htons(CONFIG_CDP_DEVICE_ID);
946 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
947 memcpy((uchar *)s, buf, 16);
951 #ifdef CONFIG_CDP_PORT_ID
952 *s++ = htons(CDP_PORT_ID_TLV);
953 memset(buf, 0, sizeof(buf));
954 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
956 if (len & 1) /* make it even */
958 *s++ = htons(len + 4);
959 memcpy((uchar *)s, buf, len);
963 #ifdef CONFIG_CDP_CAPABILITIES
964 *s++ = htons(CDP_CAPABILITIES_TLV);
966 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
970 #ifdef CONFIG_CDP_VERSION
971 *s++ = htons(CDP_VERSION_TLV);
972 memset(buf, 0, sizeof(buf));
973 strcpy(buf, CONFIG_CDP_VERSION);
975 if (len & 1) /* make it even */
977 *s++ = htons(len + 4);
978 memcpy((uchar *)s, buf, len);
982 #ifdef CONFIG_CDP_PLATFORM
983 *s++ = htons(CDP_PLATFORM_TLV);
984 memset(buf, 0, sizeof(buf));
985 strcpy(buf, CONFIG_CDP_PLATFORM);
987 if (len & 1) /* make it even */
989 *s++ = htons(len + 4);
990 memcpy((uchar *)s, buf, len);
994 #ifdef CONFIG_CDP_TRIGGER
995 *s++ = htons(CDP_TRIGGER_TLV);
997 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
1001 #ifdef CONFIG_CDP_POWER_CONSUMPTION
1002 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
1004 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
1007 /* length of ethernet packet */
1008 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
1009 et->et_protlen = htons(len);
1011 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
1012 chksum = CDP_compute_csum((uchar *)NetTxPacket + len,
1013 (uchar *)s - (NetTxPacket + len));
1016 *cp = htons(chksum);
1018 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
1028 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1033 /* if not OK try again */
1037 NetState = NETLOOP_SUCCESS;
1041 CDPDummyHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
1048 CDPHandler(const uchar *pkt, unsigned len)
1057 if (len < sizeof(CDP_SNAP_hdr) + 4)
1060 /* check for valid CDP SNAP header */
1061 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1064 pkt += sizeof(CDP_SNAP_hdr);
1065 len -= sizeof(CDP_SNAP_hdr);
1067 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1068 if (pkt[0] < 0x02 || pkt[1] == 0)
1072 * if version is greater than 0x02 maybe we'll have a problem;
1076 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1079 if (CDP_compute_csum(pkt, len) != 0)
1091 ss = (const ushort *)pkt;
1092 type = ntohs(ss[0]);
1093 tlen = ntohs(ss[1]);
1100 ss += 2; /* point ss to the data of the TLV */
1104 case CDP_DEVICE_ID_TLV:
1106 case CDP_ADDRESS_TLV:
1108 case CDP_PORT_ID_TLV:
1110 case CDP_CAPABILITIES_TLV:
1112 case CDP_VERSION_TLV:
1114 case CDP_PLATFORM_TLV:
1116 case CDP_NATIVE_VLAN_TLV:
1119 case CDP_APPLIANCE_VLAN_TLV:
1120 t = (const uchar *)ss;
1126 ss = (const ushort *)(t + 1);
1128 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1129 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1132 /* XXX will this work; dunno */
1138 case CDP_TRIGGER_TLV:
1140 case CDP_POWER_CONSUMPTION_TLV:
1142 case CDP_SYSNAME_TLV:
1144 case CDP_SYSOBJECT_TLV:
1146 case CDP_MANAGEMENT_ADDRESS_TLV:
1151 CDPApplianceVLAN = vlan;
1152 CDPNativeVLAN = nvlan;
1158 printf("** CDP packet is too short\n");
1162 static void CDPStart(void)
1164 printf("Using %s device\n", eth_get_name());
1168 CDPNativeVLAN = htons(-1);
1169 CDPApplianceVLAN = htons(-1);
1171 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1172 NetSetHandler(CDPDummyHandler);
1178 #ifdef CONFIG_IP_DEFRAG
1180 * This function collects fragments in a single packet, according
1181 * to the algorithm in RFC815. It returns NULL or the pointer to
1182 * a complete packet, in static storage
1184 #ifndef CONFIG_NET_MAXDEFRAG
1185 #define CONFIG_NET_MAXDEFRAG 16384
1188 * MAXDEFRAG, above, is chosen in the config file and is real data
1189 * so we need to add the NFS overhead, which is more than TFTP.
1190 * To use sizeof in the internal unnamed structures, we need a real
1191 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1192 * The compiler doesn't complain nor allocates the actual structure
1194 static struct rpc_t rpc_specimen;
1195 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1197 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1200 * this is the packet being assembled, either data or frag control.
1201 * Fragments go by 8 bytes, so this union must be 8 bytes long
1204 /* first_byte is address of this structure */
1205 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1206 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1207 u16 prev_hole; /* index of prev, 0 == none */
1211 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1213 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1214 static u16 first_hole, total_len;
1215 struct hole *payload, *thisfrag, *h, *newh;
1216 IP_t *localip = (IP_t *)pkt_buff;
1217 uchar *indata = (uchar *)ip;
1218 int offset8, start, len, done = 0;
1219 u16 ip_off = ntohs(ip->ip_off);
1221 /* payload starts after IP header, this fragment is in there */
1222 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1223 offset8 = (ip_off & IP_OFFS);
1224 thisfrag = payload + offset8;
1225 start = offset8 * 8;
1226 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1228 if (start + len > IP_MAXUDP) /* fragment extends too far */
1231 if (!total_len || localip->ip_id != ip->ip_id) {
1232 /* new (or different) packet, reset structs */
1234 payload[0].last_byte = ~0;
1235 payload[0].next_hole = 0;
1236 payload[0].prev_hole = 0;
1238 /* any IP header will work, copy the first we received */
1239 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1243 * What follows is the reassembly algorithm. We use the payload
1244 * array as a linked list of hole descriptors, as each hole starts
1245 * at a multiple of 8 bytes. However, last byte can be whatever value,
1246 * so it is represented as byte count, not as 8-byte blocks.
1249 h = payload + first_hole;
1250 while (h->last_byte < start) {
1251 if (!h->next_hole) {
1252 /* no hole that far away */
1255 h = payload + h->next_hole;
1258 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1259 if (offset8 + ((len + 7) / 8) <= h - payload) {
1260 /* no overlap with holes (dup fragment?) */
1264 if (!(ip_off & IP_FLAGS_MFRAG)) {
1265 /* no more fragmentss: truncate this (last) hole */
1266 total_len = start + len;
1267 h->last_byte = start + len;
1271 * There is some overlap: fix the hole list. This code doesn't
1272 * deal with a fragment that overlaps with two different holes
1273 * (thus being a superset of a previously-received fragment).
1276 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
1277 /* complete overlap with hole: remove hole */
1278 if (!h->prev_hole && !h->next_hole) {
1279 /* last remaining hole */
1281 } else if (!h->prev_hole) {
1283 first_hole = h->next_hole;
1284 payload[h->next_hole].prev_hole = 0;
1285 } else if (!h->next_hole) {
1287 payload[h->prev_hole].next_hole = 0;
1289 /* in the middle of the list */
1290 payload[h->next_hole].prev_hole = h->prev_hole;
1291 payload[h->prev_hole].next_hole = h->next_hole;
1294 } else if (h->last_byte <= start + len) {
1295 /* overlaps with final part of the hole: shorten this hole */
1296 h->last_byte = start;
1298 } else if (h >= thisfrag) {
1299 /* overlaps with initial part of the hole: move this hole */
1300 newh = thisfrag + (len / 8);
1304 payload[h->next_hole].prev_hole = (h - payload);
1306 payload[h->prev_hole].next_hole = (h - payload);
1308 first_hole = (h - payload);
1311 /* fragment sits in the middle: split the hole */
1312 newh = thisfrag + (len / 8);
1314 h->last_byte = start;
1315 h->next_hole = (newh - payload);
1316 newh->prev_hole = (h - payload);
1317 if (newh->next_hole)
1318 payload[newh->next_hole].prev_hole = (newh - payload);
1321 /* finally copy this fragment and possibly return whole packet */
1322 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1326 localip->ip_len = htons(total_len);
1327 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1331 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1333 u16 ip_off = ntohs(ip->ip_off);
1334 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1335 return ip; /* not a fragment */
1336 return __NetDefragment(ip, lenp);
1339 #else /* !CONFIG_IP_DEFRAG */
1341 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1343 u16 ip_off = ntohs(ip->ip_off);
1344 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1345 return ip; /* not a fragment */
1351 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1354 * @parma ip IP packet containing the ICMP
1356 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et)
1358 ICMP_t *icmph = (ICMP_t *)&ip->udp_src;
1360 switch (icmph->type) {
1362 if (icmph->code != ICMP_REDIR_HOST)
1364 printf(" ICMP Host Redirect to %pI4 ",
1365 &icmph->un.gateway);
1367 #if defined(CONFIG_CMD_PING)
1368 case ICMP_ECHO_REPLY:
1370 * IP header OK. Pass the packet to the
1374 * XXX point to ip packet - should this use
1375 * packet_icmp_handler?
1377 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1379 case ICMP_ECHO_REQUEST:
1380 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
1381 ETHER_HDR_SIZE + len);
1383 memcpy(&et->et_dest[0], &et->et_src[0], 6);
1384 memcpy(&et->et_src[0], NetOurEther, 6);
1388 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
1389 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1390 ip->ip_sum = ~NetCksum((uchar *)ip,
1391 IP_HDR_SIZE_NO_UDP >> 1);
1393 icmph->type = ICMP_ECHO_REPLY;
1394 icmph->checksum = 0;
1395 icmph->checksum = ~NetCksum((uchar *)icmph,
1396 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1397 (void) eth_send((uchar *)et,
1398 ETHER_HDR_SIZE + len);
1402 #ifdef CONFIG_CMD_TFTPPUT
1403 if (packet_icmp_handler)
1404 packet_icmp_handler(icmph->type, icmph->code,
1405 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
1406 icmph->un.data, ntohs(ip->udp_len));
1413 NetReceive(volatile uchar *inpkt, int len)
1422 #if defined(CONFIG_CMD_CDP)
1425 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1427 debug("packet received\n");
1429 NetRxPacket = inpkt;
1430 NetRxPacketLen = len;
1431 et = (Ethernet_t *)inpkt;
1433 /* too small packet? */
1434 if (len < ETHER_HDR_SIZE)
1439 (*push_packet)(inpkt, len);
1444 #if defined(CONFIG_CMD_CDP)
1445 /* keep track if packet is CDP */
1446 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1449 myvlanid = ntohs(NetOurVLAN);
1450 if (myvlanid == (ushort)-1)
1451 myvlanid = VLAN_NONE;
1452 mynvlanid = ntohs(NetOurNativeVLAN);
1453 if (mynvlanid == (ushort)-1)
1454 mynvlanid = VLAN_NONE;
1456 x = ntohs(et->et_protlen);
1458 debug("packet received\n");
1462 * Got a 802 packet. Check the other protocol field.
1464 x = ntohs(et->et_prot);
1466 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1467 len -= E802_HDR_SIZE;
1469 } else if (x != PROT_VLAN) { /* normal packet */
1470 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1471 len -= ETHER_HDR_SIZE;
1473 } else { /* VLAN packet */
1474 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1476 debug("VLAN packet received\n");
1478 /* too small packet? */
1479 if (len < VLAN_ETHER_HDR_SIZE)
1482 /* if no VLAN active */
1483 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1484 #if defined(CONFIG_CMD_CDP)
1490 cti = ntohs(vet->vet_tag);
1491 vlanid = cti & VLAN_IDMASK;
1492 x = ntohs(vet->vet_type);
1494 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1495 len -= VLAN_ETHER_HDR_SIZE;
1498 debug("Receive from protocol 0x%x\n", x);
1500 #if defined(CONFIG_CMD_CDP)
1502 CDPHandler((uchar *)ip, len);
1507 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1508 if (vlanid == VLAN_NONE)
1509 vlanid = (mynvlanid & VLAN_IDMASK);
1511 if (vlanid != (myvlanid & VLAN_IDMASK))
1519 * We have to deal with two types of ARP packets:
1520 * - REQUEST packets will be answered by sending our
1521 * IP address - if we know it.
1522 * - REPLY packates are expected only after we asked
1523 * for the TFTP server's or the gateway's ethernet
1524 * address; so if we receive such a packet, we set
1525 * the server ethernet address
1530 if (len < ARP_HDR_SIZE) {
1531 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1534 if (ntohs(arp->ar_hrd) != ARP_ETHER)
1536 if (ntohs(arp->ar_pro) != PROT_IP)
1538 if (arp->ar_hln != 6)
1540 if (arp->ar_pln != 4)
1546 if (NetReadIP(&arp->ar_data[16]) != NetOurIP)
1549 switch (ntohs(arp->ar_op)) {
1551 /* reply with our IP address */
1552 debug("Got ARP REQUEST, return our IP\n");
1554 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1555 arp->ar_op = htons(ARPOP_REPLY);
1556 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6);
1557 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1558 memcpy(&arp->ar_data[0], NetOurEther, 6);
1559 NetCopyIP(&arp->ar_data[6], &NetOurIP);
1560 (void) eth_send((uchar *)et,
1561 (pkt - (uchar *)et) + ARP_HDR_SIZE);
1564 case ARPOP_REPLY: /* arp reply */
1565 /* are we waiting for a reply */
1566 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1569 #ifdef CONFIG_KEEP_SERVERADDR
1570 if (NetServerIP == NetArpWaitPacketIP) {
1572 sprintf(buf, "%pM", arp->ar_data);
1573 setenv("serveraddr", buf);
1577 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1580 tmp = NetReadIP(&arp->ar_data[6]);
1582 /* matched waiting packet's address */
1583 if (tmp == NetArpWaitReplyIP) {
1585 /* save address for later use */
1586 memcpy(NetArpWaitPacketMAC,
1587 &arp->ar_data[0], 6);
1589 #ifdef CONFIG_NETCONSOLE
1590 (*packetHandler)(0, 0, 0, 0, 0);
1592 /* modify header, and transmit it */
1593 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1594 (void) eth_send(NetArpWaitTxPacket,
1595 NetArpWaitTxPacketSize);
1597 /* no arp request pending now */
1598 NetArpWaitPacketIP = 0;
1599 NetArpWaitTxPacketSize = 0;
1600 NetArpWaitPacketMAC = NULL;
1605 debug("Unexpected ARP opcode 0x%x\n",
1611 #ifdef CONFIG_CMD_RARP
1613 debug("Got RARP\n");
1615 if (len < ARP_HDR_SIZE) {
1616 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1620 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1621 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1622 (ntohs(arp->ar_pro) != PROT_IP) ||
1623 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1625 puts("invalid RARP header\n");
1627 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1628 if (NetServerIP == 0)
1629 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1630 memcpy(NetServerEther, &arp->ar_data[0], 6);
1632 (*packetHandler)(0, 0, 0, 0, 0);
1638 /* Before we start poking the header, make sure it is there */
1639 if (len < IP_HDR_SIZE) {
1640 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1643 /* Check the packet length */
1644 if (len < ntohs(ip->ip_len)) {
1645 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1648 len = ntohs(ip->ip_len);
1649 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1651 /* Can't deal with anything except IPv4 */
1652 if ((ip->ip_hl_v & 0xf0) != 0x40)
1654 /* Can't deal with IP options (headers != 20 bytes) */
1655 if ((ip->ip_hl_v & 0x0f) > 0x05)
1657 /* Check the Checksum of the header */
1658 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1659 puts("checksum bad\n");
1662 /* If it is not for us, ignore it */
1663 tmp = NetReadIP(&ip->ip_dst);
1664 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1665 #ifdef CONFIG_MCAST_TFTP
1666 if (Mcast_addr != tmp)
1670 /* Read source IP address for later use */
1671 src_ip = NetReadIP(&ip->ip_src);
1673 * The function returns the unchanged packet if it's not
1674 * a fragment, and either the complete packet or NULL if
1675 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1677 ip = NetDefragment(ip, &len);
1681 * watch for ICMP host redirects
1683 * There is no real handler code (yet). We just watch
1684 * for ICMP host redirect messages. In case anybody
1685 * sees these messages: please contact me
1686 * (wd@denx.de), or - even better - send me the
1687 * necessary fixes :-)
1689 * Note: in all cases where I have seen this so far
1690 * it was a problem with the router configuration,
1691 * for instance when a router was configured in the
1692 * BOOTP reply, but the TFTP server was on the same
1693 * subnet. So this is probably a warning that your
1694 * configuration might be wrong. But I'm not really
1695 * sure if there aren't any other situations.
1697 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1698 * we send a tftp packet to a dead connection, or when
1699 * there is no server at the other end.
1701 if (ip->ip_p == IPPROTO_ICMP) {
1702 receive_icmp(ip, len, src_ip, et);
1704 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1708 #ifdef CONFIG_UDP_CHECKSUM
1709 if (ip->udp_xsum != 0) {
1715 xsum += (ntohs(ip->udp_len));
1716 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1717 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1718 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1719 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1721 sumlen = ntohs(ip->udp_len);
1722 sumptr = (ushort *) &(ip->udp_src);
1724 while (sumlen > 1) {
1727 sumdata = *sumptr++;
1728 xsum += ntohs(sumdata);
1734 sumdata = *(unsigned char *) sumptr;
1735 sumdata = (sumdata << 8) & 0xff00;
1738 while ((xsum >> 16) != 0) {
1739 xsum = (xsum & 0x0000ffff) +
1740 ((xsum >> 16) & 0x0000ffff);
1742 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1743 printf(" UDP wrong checksum %08lx %08x\n",
1744 xsum, ntohs(ip->udp_xsum));
1751 #ifdef CONFIG_NETCONSOLE
1752 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1755 ntohs(ip->udp_len) - 8);
1758 * IP header OK. Pass the packet to the current handler.
1760 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1764 ntohs(ip->udp_len) - 8);
1770 /**********************************************************************/
1772 static int net_check_prereq(enum proto_t protocol)
1776 #if defined(CONFIG_CMD_PING)
1778 if (NetPingIP == 0) {
1779 puts("*** ERROR: ping address not given\n");
1784 #if defined(CONFIG_CMD_SNTP)
1786 if (NetNtpServerIP == 0) {
1787 puts("*** ERROR: NTP server address not given\n");
1792 #if defined(CONFIG_CMD_DNS)
1794 if (NetOurDNSIP == 0) {
1795 puts("*** ERROR: DNS server address not given\n");
1800 #if defined(CONFIG_CMD_NFS)
1805 if (NetServerIP == 0) {
1806 puts("*** ERROR: `serverip' not set\n");
1809 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1810 defined(CONFIG_CMD_DNS)
1817 if (NetOurIP == 0) {
1818 puts("*** ERROR: `ipaddr' not set\n");
1823 #ifdef CONFIG_CMD_RARP
1829 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1830 extern int eth_get_dev_index(void);
1831 int num = eth_get_dev_index();
1835 puts("*** ERROR: No ethernet found.\n");
1838 puts("*** ERROR: `ethaddr' not set\n");
1841 printf("*** ERROR: `eth%daddr' not set\n",
1855 /**********************************************************************/
1858 NetCksumOk(uchar *ptr, int len)
1860 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1865 NetCksum(uchar *ptr, int len)
1868 ushort *p = (ushort *)ptr;
1873 xsum = (xsum & 0xffff) + (xsum >> 16);
1874 xsum = (xsum & 0xffff) + (xsum >> 16);
1875 return xsum & 0xffff;
1883 myvlanid = ntohs(NetOurVLAN);
1884 if (myvlanid == (ushort)-1)
1885 myvlanid = VLAN_NONE;
1887 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1888 VLAN_ETHER_HDR_SIZE;
1892 NetSetEther(volatile uchar *xet, uchar * addr, uint prot)
1894 Ethernet_t *et = (Ethernet_t *)xet;
1897 myvlanid = ntohs(NetOurVLAN);
1898 if (myvlanid == (ushort)-1)
1899 myvlanid = VLAN_NONE;
1901 memcpy(et->et_dest, addr, 6);
1902 memcpy(et->et_src, NetOurEther, 6);
1903 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1904 et->et_protlen = htons(prot);
1905 return ETHER_HDR_SIZE;
1907 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1909 vet->vet_vlan_type = htons(PROT_VLAN);
1910 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1911 vet->vet_type = htons(prot);
1912 return VLAN_ETHER_HDR_SIZE;
1917 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len)
1919 IP_t *ip = (IP_t *)xip;
1922 * If the data is an odd number of bytes, zero the
1923 * byte after the last byte so that the checksum
1927 xip[IP_HDR_SIZE + len] = 0;
1930 * Construct an IP and UDP header.
1931 * (need to set no fragment bit - XXX)
1933 /* IP_HDR_SIZE / 4 (not including UDP) */
1936 ip->ip_len = htons(IP_HDR_SIZE + len);
1937 ip->ip_id = htons(NetIPID++);
1938 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1940 ip->ip_p = 17; /* UDP */
1942 /* already in network byte order */
1943 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1945 NetCopyIP((void *)&ip->ip_dst, &dest);
1946 ip->udp_src = htons(sport);
1947 ip->udp_dst = htons(dport);
1948 ip->udp_len = htons(8 + len);
1950 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1953 void copy_filename(char *dst, const char *src, int size)
1955 if (*src && (*src == '"')) {
1960 while ((--size > 0) && *src && (*src != '"'))
1965 #if defined(CONFIG_CMD_NFS) || \
1966 defined(CONFIG_CMD_SNTP) || \
1967 defined(CONFIG_CMD_DNS)
1969 * make port a little random (1024-17407)
1970 * This keeps the math somewhat trivial to compute, and seems to work with
1971 * all supported protocols/clients/servers
1973 unsigned int random_port(void)
1975 return 1024 + (get_timer(0) % 0x4000);
1979 void ip_to_string(IPaddr_t x, char *s)
1982 sprintf(s, "%d.%d.%d.%d",
1983 (int) ((x >> 24) & 0xff),
1984 (int) ((x >> 16) & 0xff),
1985 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1989 void VLAN_to_string(ushort x, char *s)
1993 if (x == (ushort)-1)
1999 sprintf(s, "%d", x & VLAN_IDMASK);
2002 ushort string_to_VLAN(const char *s)
2007 return htons(VLAN_NONE);
2009 if (*s < '0' || *s > '9')
2012 id = (ushort)simple_strtoul(s, NULL, 10);
2017 ushort getenv_VLAN(char *var)
2019 return string_to_VLAN(getenv(var));