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 #ifdef CONFIG_NET_MULTI
173 /* Tried all network devices */
175 /* Network loop restarted */
176 static int NetRestarted;
177 /* At least one device configured */
178 static int NetDevExists;
181 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
182 /* default is without VLAN */
183 ushort NetOurVLAN = 0xFFFF;
185 ushort NetOurNativeVLAN = 0xFFFF;
190 #if defined(CONFIG_CMD_PING)
191 /* the ip address to ping */
194 static void PingStart(void);
197 #if defined(CONFIG_CMD_CDP)
198 static void CDPStart(void);
201 #if defined(CONFIG_CMD_SNTP)
202 /* NTP server IP address */
203 IPaddr_t NetNtpServerIP;
204 /* offset time from UTC */
208 #ifdef CONFIG_NETCONSOLE
210 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
213 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
216 volatile uchar *NetRxPackets[PKTBUFSRX];
218 /* Current RX packet handler */
219 static rxhand_f *packetHandler;
220 /* Current timeout handler */
221 static thand_f *timeHandler;
222 /* Time base value */
223 static ulong timeStart;
224 /* Current timeout value */
225 static ulong timeDelta;
226 /* THE transmit packet */
227 volatile uchar *NetTxPacket;
229 static int net_check_prereq(proto_t protocol);
231 static int NetTryCount;
233 /**********************************************************************/
235 IPaddr_t NetArpWaitPacketIP;
236 IPaddr_t NetArpWaitReplyIP;
237 /* MAC address of waiting packet's destination */
238 uchar *NetArpWaitPacketMAC;
239 /* THE transmit packet */
240 uchar *NetArpWaitTxPacket;
241 int NetArpWaitTxPacketSize;
242 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
243 ulong NetArpWaitTimerStart;
246 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 for (i = 10; i < 16; ++i) {
271 /* dest ET addr = 0 */
275 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
276 (NetOurIP & NetOurSubnetMask)) {
277 if (NetOurGatewayIP == 0) {
278 puts("## Warning: gatewayip needed but not set\n");
279 NetArpWaitReplyIP = NetArpWaitPacketIP;
281 NetArpWaitReplyIP = NetOurGatewayIP;
284 NetArpWaitReplyIP = NetArpWaitPacketIP;
287 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP);
288 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
291 void ArpTimeoutCheck(void)
295 if (!NetArpWaitPacketIP)
300 /* check for arp timeout */
301 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
304 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
305 puts("\nARP Retry count exceeded; starting again\n");
309 NetArpWaitTimerStart = t;
316 NetInitLoop(proto_t protocol)
318 static int env_changed_id;
320 int env_id = get_env_id();
322 /* update only when the environment has changed */
323 if (env_changed_id != env_id) {
324 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
325 NetOurGatewayIP = getenv_IPaddr("gatewayip");
326 NetOurSubnetMask = getenv_IPaddr("netmask");
327 NetServerIP = getenv_IPaddr("serverip");
328 NetOurNativeVLAN = getenv_VLAN("nvlan");
329 NetOurVLAN = getenv_VLAN("vlan");
330 #if defined(CONFIG_CMD_DNS)
331 NetOurDNSIP = getenv_IPaddr("dnsip");
333 env_changed_id = env_id;
339 /**********************************************************************/
341 * Main network processing loop.
345 NetLoop(proto_t protocol)
349 #ifdef CONFIG_NET_MULTI
354 /* XXX problem with bss workaround */
355 NetArpWaitPacketMAC = NULL;
356 NetArpWaitTxPacket = NULL;
357 NetArpWaitPacketIP = 0;
358 NetArpWaitReplyIP = 0;
359 NetArpWaitTxPacket = NULL;
366 * Setup packet buffers, aligned correctly.
368 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
369 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
370 for (i = 0; i < PKTBUFSRX; i++) {
371 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
375 if (!NetArpWaitTxPacket) {
376 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
377 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
378 NetArpWaitTxPacketSize = 0;
382 #ifdef CONFIG_NET_MULTI
385 if (eth_init(bd) < 0) {
391 #ifdef CONFIG_NET_MULTI
392 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
394 eth_getenv_enetaddr("ethaddr", NetOurEther);
397 NetState = NETLOOP_CONTINUE;
400 * Start the ball rolling with the given start function. From
401 * here on, this code is a state machine driven by received
402 * packets and timer events.
404 NetInitLoop(protocol);
406 switch (net_check_prereq(protocol)) {
408 /* network not configured */
412 #ifdef CONFIG_NET_MULTI
414 /* network device not configured */
416 #endif /* CONFIG_NET_MULTI */
419 #ifdef CONFIG_NET_MULTI
424 /* always use ARP to get server ethernet address */
428 #if defined(CONFIG_CMD_DHCP)
432 DhcpRequest(); /* Basically same as BOOTP */
442 #if defined(CONFIG_CMD_RARP)
449 #if defined(CONFIG_CMD_PING)
454 #if defined(CONFIG_CMD_NFS)
459 #if defined(CONFIG_CMD_CDP)
464 #ifdef CONFIG_NETCONSOLE
469 #if defined(CONFIG_CMD_SNTP)
474 #if defined(CONFIG_CMD_DNS)
483 NetBootFileXferSize = 0;
487 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
488 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
489 defined(CONFIG_STATUS_LED) && \
490 defined(STATUS_LED_RED)
492 * Echo the inverted link state to the fault LED.
494 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
495 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
497 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
499 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
500 #endif /* CONFIG_MII, ... */
503 * Main packet reception loop. Loop receiving packets until
504 * someone sets `NetState' to a state that terminates.
508 #ifdef CONFIG_SHOW_ACTIVITY
510 extern void show_activity(int arg);
515 * Check the ethernet for a new packet. The ethernet
516 * receive routine will process it.
521 * Abort if ctrl-c was pressed.
532 * Check for a timeout, and run the timeout handler
535 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
538 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
539 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
540 defined(CONFIG_STATUS_LED) && \
541 defined(STATUS_LED_RED)
543 * Echo the inverted link state to the fault LED.
545 if (miiphy_link(eth_get_dev()->name,
546 CONFIG_SYS_FAULT_MII_ADDR)) {
547 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
549 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
551 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
552 #endif /* CONFIG_MII, ... */
554 timeHandler = (thand_f *)0;
561 case NETLOOP_RESTART:
562 #ifdef CONFIG_NET_MULTI
567 case NETLOOP_SUCCESS:
568 if (NetBootFileXferSize > 0) {
570 printf("Bytes transferred = %ld (%lx hex)\n",
572 NetBootFileXferSize);
573 sprintf(buf, "%lX", NetBootFileXferSize);
574 setenv("filesize", buf);
576 sprintf(buf, "%lX", (unsigned long)load_addr);
577 setenv("fileaddr", buf);
580 return NetBootFileXferSize;
588 /**********************************************************************/
591 startAgainTimeout(void)
593 NetState = NETLOOP_RESTART;
597 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
598 unsigned src, unsigned len)
600 /* Totally ignore the packet */
603 void NetStartAgain(void)
606 int retry_forever = 0;
607 unsigned long retrycnt = 0;
609 nretry = getenv("netretry");
611 if (!strcmp(nretry, "yes"))
613 else if (!strcmp(nretry, "no"))
615 else if (!strcmp(nretry, "once"))
618 retrycnt = simple_strtoul(nretry, NULL, 0);
622 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
624 NetState = NETLOOP_FAIL;
630 #ifndef CONFIG_NET_MULTI
631 NetSetTimeout(10000UL, startAgainTimeout);
632 NetSetHandler(startAgainHandler);
633 #else /* !CONFIG_NET_MULTI*/
635 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
636 eth_try_another(!NetRestarted);
639 if (NetRestartWrap) {
642 NetSetTimeout(10000UL, startAgainTimeout);
643 NetSetHandler(startAgainHandler);
645 NetState = NETLOOP_FAIL;
648 NetState = NETLOOP_RESTART;
650 #endif /* CONFIG_NET_MULTI */
653 /**********************************************************************/
659 NetSetHandler(rxhand_f * f)
666 NetSetTimeout(ulong iv, thand_f * f)
669 timeHandler = (thand_f *)0;
672 timeStart = get_timer(0);
679 NetSendPacket(volatile uchar * pkt, int len)
681 (void) eth_send(pkt, len);
685 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
689 /* convert to new style broadcast */
693 /* if broadcast, make the ether address a broadcast and don't do ARP */
694 if (dest == 0xFFFFFFFF)
695 ether = NetBcastAddr;
698 * if MAC address was not discovered yet, save the packet and do
701 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
703 debug("sending ARP for %08lx\n", dest);
705 NetArpWaitPacketIP = dest;
706 NetArpWaitPacketMAC = ether;
708 pkt = NetArpWaitTxPacket;
709 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
711 NetSetIP(pkt, dest, dport, sport, len);
712 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
713 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
715 /* size of the waiting packet */
716 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
719 /* and do the ARP request */
721 NetArpWaitTimerStart = get_timer(0);
723 return 1; /* waiting */
726 debug("sending UDP to %08lx/%pM\n", dest, ether);
728 pkt = (uchar *)NetTxPacket;
729 pkt += NetSetEther(pkt, ether, PROT_IP);
730 NetSetIP(pkt, dest, dport, sport, len);
731 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
733 return 0; /* transmitted */
736 #if defined(CONFIG_CMD_PING)
737 static ushort PingSeqNo;
746 /* XXX always send arp request */
748 memcpy(mac, NetEtherNullAddr, 6);
750 debug("sending ARP for %08lx\n", NetPingIP);
752 NetArpWaitPacketIP = NetPingIP;
753 NetArpWaitPacketMAC = mac;
755 pkt = NetArpWaitTxPacket;
756 pkt += NetSetEther(pkt, mac, PROT_IP);
758 ip = (volatile IP_t *)pkt;
761 * Construct an IP and ICMP header.
762 * (need to set no fragment bit - XXX)
764 /* IP_HDR_SIZE / 4 (not including UDP) */
767 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
768 ip->ip_id = htons(NetIPID++);
769 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
771 ip->ip_p = 0x01; /* ICMP */
773 /* already in network byte order */
774 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
776 NetCopyIP((void*)&ip->ip_dst, &NetPingIP);
777 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
779 s = &ip->udp_src; /* XXX ICMP starts here */
780 s[0] = htons(0x0800); /* echo-request, code */
781 s[1] = 0; /* checksum */
782 s[2] = 0; /* identifier */
783 s[3] = htons(PingSeqNo++); /* sequence number */
784 s[1] = ~NetCksum((uchar *)s, 8/2);
786 /* size of the waiting packet */
787 NetArpWaitTxPacketSize =
788 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
790 /* and do the ARP request */
792 NetArpWaitTimerStart = get_timer(0);
794 return 1; /* waiting */
801 NetState = NETLOOP_FAIL; /* we did not get the reply */
805 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
808 if (sip != NetPingIP)
811 NetState = NETLOOP_SUCCESS;
814 static void PingStart(void)
816 #if defined(CONFIG_NET_MULTI)
817 printf("Using %s device\n", eth_get_name());
818 #endif /* CONFIG_NET_MULTI */
819 NetSetTimeout(10000UL, PingTimeout);
820 NetSetHandler(PingHandler);
826 #if defined(CONFIG_CMD_CDP)
828 #define CDP_DEVICE_ID_TLV 0x0001
829 #define CDP_ADDRESS_TLV 0x0002
830 #define CDP_PORT_ID_TLV 0x0003
831 #define CDP_CAPABILITIES_TLV 0x0004
832 #define CDP_VERSION_TLV 0x0005
833 #define CDP_PLATFORM_TLV 0x0006
834 #define CDP_NATIVE_VLAN_TLV 0x000a
835 #define CDP_APPLIANCE_VLAN_TLV 0x000e
836 #define CDP_TRIGGER_TLV 0x000f
837 #define CDP_POWER_CONSUMPTION_TLV 0x0010
838 #define CDP_SYSNAME_TLV 0x0014
839 #define CDP_SYSOBJECT_TLV 0x0015
840 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
842 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
847 ushort CDPNativeVLAN;
848 ushort CDPApplianceVLAN;
850 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20,
853 static ushort CDP_compute_csum(const uchar *buff, ushort len)
862 odd = 1 & (ulong)buff;
872 if (result & 0x80000000)
873 result = (result & 0xFFFF) + (result >> 16);
877 leftover = (signed short)(*(const signed char *)buff);
878 /* CISCO SUCKS big time! (and blows too):
879 * CDP uses the IP checksum algorithm with a twist;
880 * for the last byte it *sign* extends and sums.
882 result = (result & 0xffff0000) |
883 ((result + leftover) & 0x0000ffff);
886 result = (result & 0xFFFF) + (result >> 16);
889 result = ((result >> 8) & 0xff) |
890 ((result & 0xff) << 8);
893 /* add up 16-bit and 17-bit words for 17+c bits */
894 result = (result & 0xffff) + (result >> 16);
895 /* add up 16-bit and 2-bit for 16+c bit */
896 result = (result & 0xffff) + (result >> 16);
898 result = (result & 0xffff) + (result >> 16);
901 csum = ~(ushort)result;
903 /* run time endian detection */
904 if (csum != htons(csum)) /* little endian */
910 int CDPSendTrigger(void)
918 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
919 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
924 et = (Ethernet_t *)pkt;
926 /* NOTE: trigger sent not on any VLAN */
928 /* form ethernet header */
929 memcpy(et->et_dest, NetCDPAddr, 6);
930 memcpy(et->et_src, NetOurEther, 6);
932 pkt += ETHER_HDR_SIZE;
935 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
936 pkt += sizeof(CDP_SNAP_hdr);
939 *pkt++ = 0x02; /* CDP version 2 */
940 *pkt++ = 180; /* TTL */
941 s = (volatile ushort *)pkt;
943 /* checksum (0 for later calculation) */
947 #ifdef CONFIG_CDP_DEVICE_ID
948 *s++ = htons(CDP_DEVICE_ID_TLV);
949 *s++ = htons(CONFIG_CDP_DEVICE_ID);
950 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
951 memcpy((uchar *)s, buf, 16);
955 #ifdef CONFIG_CDP_PORT_ID
956 *s++ = htons(CDP_PORT_ID_TLV);
957 memset(buf, 0, sizeof(buf));
958 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
960 if (len & 1) /* make it even */
962 *s++ = htons(len + 4);
963 memcpy((uchar *)s, buf, len);
967 #ifdef CONFIG_CDP_CAPABILITIES
968 *s++ = htons(CDP_CAPABILITIES_TLV);
970 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
974 #ifdef CONFIG_CDP_VERSION
975 *s++ = htons(CDP_VERSION_TLV);
976 memset(buf, 0, sizeof(buf));
977 strcpy(buf, CONFIG_CDP_VERSION);
979 if (len & 1) /* make it even */
981 *s++ = htons(len + 4);
982 memcpy((uchar *)s, buf, len);
986 #ifdef CONFIG_CDP_PLATFORM
987 *s++ = htons(CDP_PLATFORM_TLV);
988 memset(buf, 0, sizeof(buf));
989 strcpy(buf, CONFIG_CDP_PLATFORM);
991 if (len & 1) /* make it even */
993 *s++ = htons(len + 4);
994 memcpy((uchar *)s, buf, len);
998 #ifdef CONFIG_CDP_TRIGGER
999 *s++ = htons(CDP_TRIGGER_TLV);
1001 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
1005 #ifdef CONFIG_CDP_POWER_CONSUMPTION
1006 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
1008 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
1011 /* length of ethernet packet */
1012 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
1013 et->et_protlen = htons(len);
1015 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
1016 chksum = CDP_compute_csum((uchar *)NetTxPacket + len,
1017 (uchar *)s - (NetTxPacket + len));
1020 *cp = htons(chksum);
1022 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
1032 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1037 /* if not OK try again */
1041 NetState = NETLOOP_SUCCESS;
1045 CDPDummyHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
1052 CDPHandler(const uchar * pkt, unsigned len)
1061 if (len < sizeof(CDP_SNAP_hdr) + 4)
1064 /* check for valid CDP SNAP header */
1065 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1068 pkt += sizeof(CDP_SNAP_hdr);
1069 len -= sizeof(CDP_SNAP_hdr);
1071 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1072 if (pkt[0] < 0x02 || pkt[1] == 0)
1076 * if version is greater than 0x02 maybe we'll have a problem;
1080 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1083 if (CDP_compute_csum(pkt, len) != 0)
1095 ss = (const ushort *)pkt;
1096 type = ntohs(ss[0]);
1097 tlen = ntohs(ss[1]);
1105 ss += 2; /* point ss to the data of the TLV */
1109 case CDP_DEVICE_ID_TLV:
1111 case CDP_ADDRESS_TLV:
1113 case CDP_PORT_ID_TLV:
1115 case CDP_CAPABILITIES_TLV:
1117 case CDP_VERSION_TLV:
1119 case CDP_PLATFORM_TLV:
1121 case CDP_NATIVE_VLAN_TLV:
1124 case CDP_APPLIANCE_VLAN_TLV:
1125 t = (const uchar *)ss;
1131 ss = (const ushort *)(t + 1);
1133 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1135 CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1138 /* XXX will this work; dunno */
1144 case CDP_TRIGGER_TLV:
1146 case CDP_POWER_CONSUMPTION_TLV:
1148 case CDP_SYSNAME_TLV:
1150 case CDP_SYSOBJECT_TLV:
1152 case CDP_MANAGEMENT_ADDRESS_TLV:
1157 CDPApplianceVLAN = vlan;
1158 CDPNativeVLAN = nvlan;
1164 printf("** CDP packet is too short\n");
1168 static void CDPStart(void)
1170 #if defined(CONFIG_NET_MULTI)
1171 printf("Using %s device\n", eth_get_name());
1176 CDPNativeVLAN = htons(-1);
1177 CDPApplianceVLAN = htons(-1);
1179 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1180 NetSetHandler(CDPDummyHandler);
1186 #ifdef CONFIG_IP_DEFRAG
1188 * This function collects fragments in a single packet, according
1189 * to the algorithm in RFC815. It returns NULL or the pointer to
1190 * a complete packet, in static storage
1192 #ifndef CONFIG_NET_MAXDEFRAG
1193 #define CONFIG_NET_MAXDEFRAG 16384
1196 * MAXDEFRAG, above, is chosen in the config file and is real data
1197 * so we need to add the NFS overhead, which is more than TFTP.
1198 * To use sizeof in the internal unnamed structures, we need a real
1199 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1200 * The compiler doesn't complain nor allocates the actual structure
1202 static struct rpc_t rpc_specimen;
1203 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1205 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1208 * this is the packet being assembled, either data or frag control.
1209 * Fragments go by 8 bytes, so this union must be 8 bytes long
1212 /* first_byte is address of this structure */
1213 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1214 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1215 u16 prev_hole; /* index of prev, 0 == none */
1219 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1221 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1222 static u16 first_hole, total_len;
1223 struct hole *payload, *thisfrag, *h, *newh;
1224 IP_t *localip = (IP_t *)pkt_buff;
1225 uchar *indata = (uchar *)ip;
1226 int offset8, start, len, done = 0;
1227 u16 ip_off = ntohs(ip->ip_off);
1229 /* payload starts after IP header, this fragment is in there */
1230 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1231 offset8 = (ip_off & IP_OFFS);
1232 thisfrag = payload + offset8;
1233 start = offset8 * 8;
1234 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1236 if (start + len > IP_MAXUDP) /* fragment extends too far */
1239 if (!total_len || localip->ip_id != ip->ip_id) {
1240 /* new (or different) packet, reset structs */
1242 payload[0].last_byte = ~0;
1243 payload[0].next_hole = 0;
1244 payload[0].prev_hole = 0;
1246 /* any IP header will work, copy the first we received */
1247 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1251 * What follows is the reassembly algorithm. We use the payload
1252 * array as a linked list of hole descriptors, as each hole starts
1253 * at a multiple of 8 bytes. However, last byte can be whatever value,
1254 * so it is represented as byte count, not as 8-byte blocks.
1257 h = payload + first_hole;
1258 while (h->last_byte < start) {
1259 if (!h->next_hole) {
1260 /* no hole that far away */
1263 h = payload + h->next_hole;
1266 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1267 if (offset8 + ((len + 7) / 8) <= h - payload) {
1268 /* no overlap with holes (dup fragment?) */
1272 if (!(ip_off & IP_FLAGS_MFRAG)) {
1273 /* no more fragmentss: truncate this (last) hole */
1274 total_len = start + len;
1275 h->last_byte = start + len;
1279 * There is some overlap: fix the hole list. This code doesn't
1280 * deal with a fragment that overlaps with two different holes
1281 * (thus being a superset of a previously-received fragment).
1284 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
1285 /* complete overlap with hole: remove hole */
1286 if (!h->prev_hole && !h->next_hole) {
1287 /* last remaining hole */
1289 } else if (!h->prev_hole) {
1291 first_hole = h->next_hole;
1292 payload[h->next_hole].prev_hole = 0;
1293 } else if (!h->next_hole) {
1295 payload[h->prev_hole].next_hole = 0;
1297 /* in the middle of the list */
1298 payload[h->next_hole].prev_hole = h->prev_hole;
1299 payload[h->prev_hole].next_hole = h->next_hole;
1302 } else if (h->last_byte <= start + len) {
1303 /* overlaps with final part of the hole: shorten this hole */
1304 h->last_byte = start;
1306 } else if (h >= thisfrag) {
1307 /* overlaps with initial part of the hole: move this hole */
1308 newh = thisfrag + (len / 8);
1312 payload[h->next_hole].prev_hole = (h - payload);
1314 payload[h->prev_hole].next_hole = (h - payload);
1316 first_hole = (h - payload);
1319 /* fragment sits in the middle: split the hole */
1320 newh = thisfrag + (len / 8);
1322 h->last_byte = start;
1323 h->next_hole = (newh - payload);
1324 newh->prev_hole = (h - payload);
1325 if (newh->next_hole)
1326 payload[newh->next_hole].prev_hole = (newh - payload);
1329 /* finally copy this fragment and possibly return whole packet */
1330 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1334 localip->ip_len = htons(total_len);
1335 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1339 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1341 u16 ip_off = ntohs(ip->ip_off);
1342 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1343 return ip; /* not a fragment */
1344 return __NetDefragment(ip, lenp);
1347 #else /* !CONFIG_IP_DEFRAG */
1349 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1351 u16 ip_off = ntohs(ip->ip_off);
1352 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1353 return ip; /* not a fragment */
1359 NetReceive(volatile uchar * inpkt, int len)
1368 #if defined(CONFIG_CMD_CDP)
1371 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1373 debug("packet received\n");
1375 NetRxPacket = inpkt;
1376 NetRxPacketLen = len;
1377 et = (Ethernet_t *)inpkt;
1379 /* too small packet? */
1380 if (len < ETHER_HDR_SIZE)
1385 (*push_packet)(inpkt, len);
1390 #if defined(CONFIG_CMD_CDP)
1391 /* keep track if packet is CDP */
1392 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1395 myvlanid = ntohs(NetOurVLAN);
1396 if (myvlanid == (ushort)-1)
1397 myvlanid = VLAN_NONE;
1398 mynvlanid = ntohs(NetOurNativeVLAN);
1399 if (mynvlanid == (ushort)-1)
1400 mynvlanid = VLAN_NONE;
1402 x = ntohs(et->et_protlen);
1404 debug("packet received\n");
1408 * Got a 802 packet. Check the other protocol field.
1410 x = ntohs(et->et_prot);
1412 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1413 len -= E802_HDR_SIZE;
1415 } else if (x != PROT_VLAN) { /* normal packet */
1416 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1417 len -= ETHER_HDR_SIZE;
1419 } else { /* VLAN packet */
1420 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1422 debug("VLAN packet received\n");
1424 /* too small packet? */
1425 if (len < VLAN_ETHER_HDR_SIZE)
1428 /* if no VLAN active */
1429 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1430 #if defined(CONFIG_CMD_CDP)
1436 cti = ntohs(vet->vet_tag);
1437 vlanid = cti & VLAN_IDMASK;
1438 x = ntohs(vet->vet_type);
1440 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1441 len -= VLAN_ETHER_HDR_SIZE;
1444 debug("Receive from protocol 0x%x\n", x);
1446 #if defined(CONFIG_CMD_CDP)
1448 CDPHandler((uchar *)ip, len);
1453 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1454 if (vlanid == VLAN_NONE)
1455 vlanid = (mynvlanid & VLAN_IDMASK);
1457 if (vlanid != (myvlanid & VLAN_IDMASK))
1465 * We have to deal with two types of ARP packets:
1466 * - REQUEST packets will be answered by sending our
1467 * IP address - if we know it.
1468 * - REPLY packates are expected only after we asked
1469 * for the TFTP server's or the gateway's ethernet
1470 * address; so if we receive such a packet, we set
1471 * the server ethernet address
1476 if (len < ARP_HDR_SIZE) {
1477 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1480 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1483 if (ntohs(arp->ar_pro) != PROT_IP) {
1486 if (arp->ar_hln != 6) {
1489 if (arp->ar_pln != 4) {
1493 if (NetOurIP == 0) {
1497 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1501 switch (ntohs(arp->ar_op)) {
1503 /* reply with our IP address */
1504 debug("Got ARP REQUEST, return our IP\n");
1506 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1507 arp->ar_op = htons(ARPOP_REPLY);
1508 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6);
1509 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1510 memcpy(&arp->ar_data[0], NetOurEther, 6);
1511 NetCopyIP(&arp->ar_data[6], &NetOurIP);
1512 (void) eth_send((uchar *)et,
1513 (pkt - (uchar *)et) + ARP_HDR_SIZE);
1516 case ARPOP_REPLY: /* arp reply */
1517 /* are we waiting for a reply */
1518 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1521 #ifdef CONFIG_KEEP_SERVERADDR
1522 if (NetServerIP == NetArpWaitPacketIP) {
1524 sprintf(buf, "%pM", arp->ar_data);
1525 setenv("serveraddr", buf);
1529 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1532 tmp = NetReadIP(&arp->ar_data[6]);
1534 /* matched waiting packet's address */
1535 if (tmp == NetArpWaitReplyIP) {
1537 /* save address for later use */
1538 memcpy(NetArpWaitPacketMAC,
1539 &arp->ar_data[0], 6);
1541 #ifdef CONFIG_NETCONSOLE
1542 (*packetHandler)(0, 0, 0, 0, 0);
1544 /* modify header, and transmit it */
1545 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1546 (void) eth_send(NetArpWaitTxPacket,
1547 NetArpWaitTxPacketSize);
1549 /* no arp request pending now */
1550 NetArpWaitPacketIP = 0;
1551 NetArpWaitTxPacketSize = 0;
1552 NetArpWaitPacketMAC = NULL;
1557 debug("Unexpected ARP opcode 0x%x\n",
1563 #ifdef CONFIG_CMD_RARP
1565 debug("Got RARP\n");
1567 if (len < ARP_HDR_SIZE) {
1568 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1572 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1573 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1574 (ntohs(arp->ar_pro) != PROT_IP) ||
1575 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1577 puts("invalid RARP header\n");
1579 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1580 if (NetServerIP == 0)
1581 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1582 memcpy(NetServerEther, &arp->ar_data[0], 6);
1584 (*packetHandler)(0, 0, 0, 0, 0);
1590 /* Before we start poking the header, make sure it is there */
1591 if (len < IP_HDR_SIZE) {
1592 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1595 /* Check the packet length */
1596 if (len < ntohs(ip->ip_len)) {
1597 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1600 len = ntohs(ip->ip_len);
1601 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1603 /* Can't deal with anything except IPv4 */
1604 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1607 /* Can't deal with IP options (headers != 20 bytes) */
1608 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1611 /* Check the Checksum of the header */
1612 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1613 puts("checksum bad\n");
1616 /* If it is not for us, ignore it */
1617 tmp = NetReadIP(&ip->ip_dst);
1618 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1619 #ifdef CONFIG_MCAST_TFTP
1620 if (Mcast_addr != tmp)
1624 /* Read source IP address for later use */
1625 src_ip = NetReadIP(&ip->ip_src);
1627 * The function returns the unchanged packet if it's not
1628 * a fragment, and either the complete packet or NULL if
1629 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1631 if (!(ip = NetDefragment(ip, &len)))
1634 * watch for ICMP host redirects
1636 * There is no real handler code (yet). We just watch
1637 * for ICMP host redirect messages. In case anybody
1638 * sees these messages: please contact me
1639 * (wd@denx.de), or - even better - send me the
1640 * necessary fixes :-)
1642 * Note: in all cases where I have seen this so far
1643 * it was a problem with the router configuration,
1644 * for instance when a router was configured in the
1645 * BOOTP reply, but the TFTP server was on the same
1646 * subnet. So this is probably a warning that your
1647 * configuration might be wrong. But I'm not really
1648 * sure if there aren't any other situations.
1650 if (ip->ip_p == IPPROTO_ICMP) {
1651 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1653 switch (icmph->type) {
1655 if (icmph->code != ICMP_REDIR_HOST)
1657 printf(" ICMP Host Redirect to %pI4 ",
1658 &icmph->un.gateway);
1660 #if defined(CONFIG_CMD_PING)
1661 case ICMP_ECHO_REPLY:
1663 * IP header OK. Pass the packet to the
1666 /* XXX point to ip packet */
1667 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1669 case ICMP_ECHO_REQUEST:
1670 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
1671 ETHER_HDR_SIZE + len);
1673 memcpy(&et->et_dest[0], &et->et_src[0], 6);
1674 memcpy(&et->et_src[0], NetOurEther, 6);
1678 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1679 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1680 ip->ip_sum = ~NetCksum((uchar *)ip,
1681 IP_HDR_SIZE_NO_UDP >> 1);
1683 icmph->type = ICMP_ECHO_REPLY;
1684 icmph->checksum = 0;
1685 icmph->checksum = ~NetCksum((uchar *)icmph,
1686 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1687 (void) eth_send((uchar *)et,
1688 ETHER_HDR_SIZE + len);
1694 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1698 #ifdef CONFIG_UDP_CHECKSUM
1699 if (ip->udp_xsum != 0) {
1705 xsum += (ntohs(ip->udp_len));
1706 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1707 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1708 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1709 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1711 sumlen = ntohs(ip->udp_len);
1712 sumptr = (ushort *) &(ip->udp_src);
1714 while (sumlen > 1) {
1717 sumdata = *sumptr++;
1718 xsum += ntohs(sumdata);
1724 sumdata = *(unsigned char *) sumptr;
1725 sumdata = (sumdata << 8) & 0xff00;
1728 while ((xsum >> 16) != 0) {
1729 xsum = (xsum & 0x0000ffff) +
1730 ((xsum >> 16) & 0x0000ffff);
1732 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1733 printf(" UDP wrong checksum %08lx %08x\n",
1734 xsum, ntohs(ip->udp_xsum));
1741 #ifdef CONFIG_NETCONSOLE
1742 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1745 ntohs(ip->udp_len) - 8);
1748 * IP header OK. Pass the packet to the current handler.
1750 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1754 ntohs(ip->udp_len) - 8);
1760 /**********************************************************************/
1762 static int net_check_prereq(proto_t protocol)
1766 #if defined(CONFIG_CMD_PING)
1768 if (NetPingIP == 0) {
1769 puts("*** ERROR: ping address not given\n");
1774 #if defined(CONFIG_CMD_SNTP)
1776 if (NetNtpServerIP == 0) {
1777 puts("*** ERROR: NTP server address not given\n");
1782 #if defined(CONFIG_CMD_DNS)
1784 if (NetOurDNSIP == 0) {
1785 puts("*** ERROR: DNS server address not given\n");
1790 #if defined(CONFIG_CMD_NFS)
1794 if (NetServerIP == 0) {
1795 puts("*** ERROR: `serverip' not set\n");
1798 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1799 defined(CONFIG_CMD_DNS)
1805 if (NetOurIP == 0) {
1806 puts("*** ERROR: `ipaddr' not set\n");
1811 #ifdef CONFIG_CMD_RARP
1817 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1818 #ifdef CONFIG_NET_MULTI
1819 extern int eth_get_dev_index(void);
1820 int num = eth_get_dev_index();
1824 puts("*** ERROR: No ethernet found.\n");
1827 puts("*** ERROR: `ethaddr' not set\n");
1830 printf("*** ERROR: `eth%daddr' not set\n",
1838 puts("*** ERROR: `ethaddr' not set\n");
1846 return (0); /* OK */
1848 /**********************************************************************/
1851 NetCksumOk(uchar * ptr, int len)
1853 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1858 NetCksum(uchar * ptr, int len)
1861 ushort *p = (ushort *)ptr;
1866 xsum = (xsum & 0xffff) + (xsum >> 16);
1867 xsum = (xsum & 0xffff) + (xsum >> 16);
1868 return (xsum & 0xffff);
1876 myvlanid = ntohs(NetOurVLAN);
1877 if (myvlanid == (ushort)-1)
1878 myvlanid = VLAN_NONE;
1880 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1881 VLAN_ETHER_HDR_SIZE;
1885 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1887 Ethernet_t *et = (Ethernet_t *)xet;
1890 myvlanid = ntohs(NetOurVLAN);
1891 if (myvlanid == (ushort)-1)
1892 myvlanid = VLAN_NONE;
1894 memcpy(et->et_dest, addr, 6);
1895 memcpy(et->et_src, NetOurEther, 6);
1896 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1897 et->et_protlen = htons(prot);
1898 return ETHER_HDR_SIZE;
1900 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1902 vet->vet_vlan_type = htons(PROT_VLAN);
1903 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1904 vet->vet_type = htons(prot);
1905 return VLAN_ETHER_HDR_SIZE;
1910 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1912 IP_t *ip = (IP_t *)xip;
1915 * If the data is an odd number of bytes, zero the
1916 * byte after the last byte so that the checksum
1920 xip[IP_HDR_SIZE + len] = 0;
1923 * Construct an IP and UDP header.
1924 * (need to set no fragment bit - XXX)
1926 /* IP_HDR_SIZE / 4 (not including UDP) */
1929 ip->ip_len = htons(IP_HDR_SIZE + len);
1930 ip->ip_id = htons(NetIPID++);
1931 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1933 ip->ip_p = 17; /* UDP */
1935 /* already in network byte order */
1936 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1938 NetCopyIP((void*)&ip->ip_dst, &dest);
1939 ip->udp_src = htons(sport);
1940 ip->udp_dst = htons(dport);
1941 ip->udp_len = htons(8 + len);
1943 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1946 void copy_filename(char *dst, const char *src, int size)
1948 if (*src && (*src == '"')) {
1953 while ((--size > 0) && *src && (*src != '"')) {
1959 #if defined(CONFIG_CMD_NFS) || \
1960 defined(CONFIG_CMD_SNTP) || \
1961 defined(CONFIG_CMD_DNS)
1963 * make port a little random (1024-17407)
1964 * This keeps the math somewhat trivial to compute, and seems to work with
1965 * all supported protocols/clients/servers
1967 unsigned int random_port(void)
1969 return 1024 + (get_timer(0) % 0x4000);
1973 void ip_to_string(IPaddr_t x, char *s)
1976 sprintf(s, "%d.%d.%d.%d",
1977 (int) ((x >> 24) & 0xff),
1978 (int) ((x >> 16) & 0xff),
1979 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1983 void VLAN_to_string(ushort x, char *s)
1987 if (x == (ushort)-1)
1993 sprintf(s, "%d", x & VLAN_IDMASK);
1996 ushort string_to_VLAN(const char *s)
2001 return htons(VLAN_NONE);
2003 if (*s < '0' || *s > '9')
2006 id = (ushort)simple_strtoul(s, NULL, 10);
2011 ushort getenv_VLAN(char *var)
2013 return (string_to_VLAN(getenv(var)));