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)
253 debug("ARP broadcast %d\n", NetArpWaitTry);
257 pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP);
261 arp->ar_hrd = htons(ARP_ETHER);
262 arp->ar_pro = htons(PROT_IP);
265 arp->ar_op = htons(ARPOP_REQUEST);
268 memcpy(&arp->ar_data[0], NetOurEther, 6);
270 NetWriteIP((uchar *) &arp->ar_data[6], NetOurIP);
271 for (i = 10; i < 16; ++i) {
272 /* dest ET addr = 0 */
276 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
277 (NetOurIP & NetOurSubnetMask)) {
278 if (NetOurGatewayIP == 0) {
279 puts("## Warning: gatewayip needed but not set\n");
280 NetArpWaitReplyIP = NetArpWaitPacketIP;
282 NetArpWaitReplyIP = NetOurGatewayIP;
285 NetArpWaitReplyIP = NetArpWaitPacketIP;
288 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP);
289 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
292 void ArpTimeoutCheck(void)
296 if (!NetArpWaitPacketIP)
301 /* check for arp timeout */
302 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
305 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
306 puts("\nARP Retry count exceeded; starting again\n");
310 NetArpWaitTimerStart = t;
316 static void NetInitLoop(enum 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 NetOurIP = getenv_IPaddr("ipaddr");
325 NetCopyIP(&bd->bi_ip_addr, &NetOurIP);
326 NetOurGatewayIP = getenv_IPaddr("gatewayip");
327 NetOurSubnetMask = getenv_IPaddr("netmask");
328 NetServerIP = getenv_IPaddr("serverip");
329 NetOurNativeVLAN = getenv_VLAN("nvlan");
330 NetOurVLAN = getenv_VLAN("vlan");
331 #if defined(CONFIG_CMD_DNS)
332 NetOurDNSIP = getenv_IPaddr("dnsip");
334 env_changed_id = env_id;
340 /**********************************************************************/
342 * Main network processing loop.
345 int NetLoop(enum proto_t protocol)
353 /* XXX problem with bss workaround */
354 NetArpWaitPacketMAC = NULL;
355 NetArpWaitTxPacket = NULL;
356 NetArpWaitPacketIP = 0;
357 NetArpWaitReplyIP = 0;
358 NetArpWaitTxPacket = NULL;
365 * Setup packet buffers, aligned correctly.
367 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
368 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
369 for (i = 0; i < PKTBUFSRX; i++)
370 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
373 if (!NetArpWaitTxPacket) {
374 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
375 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
376 NetArpWaitTxPacketSize = 0;
381 if (eth_init(bd) < 0) {
387 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
389 NetState = NETLOOP_CONTINUE;
392 * Start the ball rolling with the given start function. From
393 * here on, this code is a state machine driven by received
394 * packets and timer events.
396 NetInitLoop(protocol);
398 switch (net_check_prereq(protocol)) {
400 /* network not configured */
405 /* network device not configured */
410 NetBootFileXferSize = 0;
413 #ifdef CONFIG_CMD_TFTPPUT
416 /* always use ARP to get server ethernet address */
419 #ifdef CONFIG_CMD_TFTPSRV
424 #if defined(CONFIG_CMD_DHCP)
428 DhcpRequest(); /* Basically same as BOOTP */
438 #if defined(CONFIG_CMD_RARP)
445 #if defined(CONFIG_CMD_PING)
450 #if defined(CONFIG_CMD_NFS)
455 #if defined(CONFIG_CMD_CDP)
460 #ifdef CONFIG_NETCONSOLE
465 #if defined(CONFIG_CMD_SNTP)
470 #if defined(CONFIG_CMD_DNS)
482 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
483 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
484 defined(CONFIG_STATUS_LED) && \
485 defined(STATUS_LED_RED)
487 * Echo the inverted link state to the fault LED.
489 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
490 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
492 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
493 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
494 #endif /* CONFIG_MII, ... */
497 * Main packet reception loop. Loop receiving packets until
498 * someone sets `NetState' to a state that terminates.
502 #ifdef CONFIG_SHOW_ACTIVITY
504 extern void show_activity(int arg);
509 * Check the ethernet for a new packet. The ethernet
510 * receive routine will process it.
515 * Abort if ctrl-c was pressed.
526 * Check for a timeout, and run the timeout handler
529 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
532 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
533 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
534 defined(CONFIG_STATUS_LED) && \
535 defined(STATUS_LED_RED)
537 * Echo the inverted link state to the fault LED.
539 if (miiphy_link(eth_get_dev()->name,
540 CONFIG_SYS_FAULT_MII_ADDR)) {
541 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
543 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
545 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
546 #endif /* CONFIG_MII, ... */
548 timeHandler = (thand_f *)0;
555 case NETLOOP_RESTART:
559 case NETLOOP_SUCCESS:
560 if (NetBootFileXferSize > 0) {
562 printf("Bytes transferred = %ld (%lx hex)\n",
564 NetBootFileXferSize);
565 sprintf(buf, "%lX", NetBootFileXferSize);
566 setenv("filesize", buf);
568 sprintf(buf, "%lX", (unsigned long)load_addr);
569 setenv("fileaddr", buf);
572 ret = NetBootFileXferSize;
581 #ifdef CONFIG_CMD_TFTPPUT
582 /* Clear out the handlers */
584 net_set_icmp_handler(NULL);
589 /**********************************************************************/
592 startAgainTimeout(void)
594 NetState = NETLOOP_RESTART;
598 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
599 unsigned src, unsigned len)
601 /* Totally ignore the packet */
604 void NetStartAgain(void)
607 int retry_forever = 0;
608 unsigned long retrycnt = 0;
610 nretry = getenv("netretry");
612 if (!strcmp(nretry, "yes"))
614 else if (!strcmp(nretry, "no"))
616 else if (!strcmp(nretry, "once"))
619 retrycnt = simple_strtoul(nretry, NULL, 0);
623 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
625 NetState = NETLOOP_FAIL;
632 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
633 eth_try_another(!NetRestarted);
636 if (NetRestartWrap) {
639 NetSetTimeout(10000UL, startAgainTimeout);
640 NetSetHandler(startAgainHandler);
642 NetState = NETLOOP_FAIL;
645 NetState = NETLOOP_RESTART;
649 /**********************************************************************/
655 NetSetHandler(rxhand_f *f)
660 #ifdef CONFIG_CMD_TFTPPUT
661 void net_set_icmp_handler(rxhand_icmp_f *f)
663 packet_icmp_handler = f;
668 NetSetTimeout(ulong iv, thand_f *f)
671 timeHandler = (thand_f *)0;
674 timeStart = get_timer(0);
681 NetSendPacket(volatile uchar *pkt, int len)
683 (void) eth_send(pkt, len);
687 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
691 /* convert to new style broadcast */
695 /* if broadcast, make the ether address a broadcast and don't do ARP */
696 if (dest == 0xFFFFFFFF)
697 ether = NetBcastAddr;
700 * if MAC address was not discovered yet, save the packet and do
703 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
705 debug("sending ARP for %08lx\n", dest);
707 NetArpWaitPacketIP = dest;
708 NetArpWaitPacketMAC = ether;
710 pkt = NetArpWaitTxPacket;
711 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
713 NetSetIP(pkt, dest, dport, sport, len);
714 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
715 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
717 /* size of the waiting packet */
718 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
721 /* and do the ARP request */
723 NetArpWaitTimerStart = get_timer(0);
725 return 1; /* waiting */
728 debug("sending UDP to %08lx/%pM\n", dest, ether);
730 pkt = (uchar *)NetTxPacket;
731 pkt += NetSetEther(pkt, ether, PROT_IP);
732 NetSetIP(pkt, dest, dport, sport, len);
733 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
735 return 0; /* transmitted */
738 #if defined(CONFIG_CMD_PING)
739 static ushort PingSeqNo;
748 /* XXX always send arp request */
750 memcpy(mac, NetEtherNullAddr, 6);
752 debug("sending ARP for %08lx\n", NetPingIP);
754 NetArpWaitPacketIP = NetPingIP;
755 NetArpWaitPacketMAC = mac;
757 pkt = NetArpWaitTxPacket;
758 pkt += NetSetEther(pkt, mac, PROT_IP);
760 ip = (volatile IP_t *)pkt;
763 * Construct an IP and ICMP header.
764 * (need to set no fragment bit - XXX)
766 /* IP_HDR_SIZE / 4 (not including UDP) */
769 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
770 ip->ip_id = htons(NetIPID++);
771 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
773 ip->ip_p = 0x01; /* ICMP */
775 /* already in network byte order */
776 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
778 NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
779 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
781 s = &ip->udp_src; /* XXX ICMP starts here */
782 s[0] = htons(0x0800); /* echo-request, code */
783 s[1] = 0; /* checksum */
784 s[2] = 0; /* identifier */
785 s[3] = htons(PingSeqNo++); /* sequence number */
786 s[1] = ~NetCksum((uchar *)s, 8/2);
788 /* size of the waiting packet */
789 NetArpWaitTxPacketSize =
790 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
792 /* and do the ARP request */
794 NetArpWaitTimerStart = get_timer(0);
796 return 1; /* waiting */
803 NetState = NETLOOP_FAIL; /* we did not get the reply */
807 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
810 if (sip != NetPingIP)
813 NetState = NETLOOP_SUCCESS;
816 static void PingStart(void)
818 printf("Using %s device\n", eth_get_name());
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]);
1104 ss += 2; /* point ss to the data of the TLV */
1108 case CDP_DEVICE_ID_TLV:
1110 case CDP_ADDRESS_TLV:
1112 case CDP_PORT_ID_TLV:
1114 case CDP_CAPABILITIES_TLV:
1116 case CDP_VERSION_TLV:
1118 case CDP_PLATFORM_TLV:
1120 case CDP_NATIVE_VLAN_TLV:
1123 case CDP_APPLIANCE_VLAN_TLV:
1124 t = (const uchar *)ss;
1130 ss = (const ushort *)(t + 1);
1132 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1133 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1136 /* XXX will this work; dunno */
1142 case CDP_TRIGGER_TLV:
1144 case CDP_POWER_CONSUMPTION_TLV:
1146 case CDP_SYSNAME_TLV:
1148 case CDP_SYSOBJECT_TLV:
1150 case CDP_MANAGEMENT_ADDRESS_TLV:
1155 CDPApplianceVLAN = vlan;
1156 CDPNativeVLAN = nvlan;
1162 printf("** CDP packet is too short\n");
1166 static void CDPStart(void)
1168 printf("Using %s device\n", eth_get_name());
1172 CDPNativeVLAN = htons(-1);
1173 CDPApplianceVLAN = htons(-1);
1175 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1176 NetSetHandler(CDPDummyHandler);
1182 #ifdef CONFIG_IP_DEFRAG
1184 * This function collects fragments in a single packet, according
1185 * to the algorithm in RFC815. It returns NULL or the pointer to
1186 * a complete packet, in static storage
1188 #ifndef CONFIG_NET_MAXDEFRAG
1189 #define CONFIG_NET_MAXDEFRAG 16384
1192 * MAXDEFRAG, above, is chosen in the config file and is real data
1193 * so we need to add the NFS overhead, which is more than TFTP.
1194 * To use sizeof in the internal unnamed structures, we need a real
1195 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1196 * The compiler doesn't complain nor allocates the actual structure
1198 static struct rpc_t rpc_specimen;
1199 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1201 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1204 * this is the packet being assembled, either data or frag control.
1205 * Fragments go by 8 bytes, so this union must be 8 bytes long
1208 /* first_byte is address of this structure */
1209 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1210 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1211 u16 prev_hole; /* index of prev, 0 == none */
1215 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1217 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1218 static u16 first_hole, total_len;
1219 struct hole *payload, *thisfrag, *h, *newh;
1220 IP_t *localip = (IP_t *)pkt_buff;
1221 uchar *indata = (uchar *)ip;
1222 int offset8, start, len, done = 0;
1223 u16 ip_off = ntohs(ip->ip_off);
1225 /* payload starts after IP header, this fragment is in there */
1226 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1227 offset8 = (ip_off & IP_OFFS);
1228 thisfrag = payload + offset8;
1229 start = offset8 * 8;
1230 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1232 if (start + len > IP_MAXUDP) /* fragment extends too far */
1235 if (!total_len || localip->ip_id != ip->ip_id) {
1236 /* new (or different) packet, reset structs */
1238 payload[0].last_byte = ~0;
1239 payload[0].next_hole = 0;
1240 payload[0].prev_hole = 0;
1242 /* any IP header will work, copy the first we received */
1243 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1247 * What follows is the reassembly algorithm. We use the payload
1248 * array as a linked list of hole descriptors, as each hole starts
1249 * at a multiple of 8 bytes. However, last byte can be whatever value,
1250 * so it is represented as byte count, not as 8-byte blocks.
1253 h = payload + first_hole;
1254 while (h->last_byte < start) {
1255 if (!h->next_hole) {
1256 /* no hole that far away */
1259 h = payload + h->next_hole;
1262 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1263 if (offset8 + ((len + 7) / 8) <= h - payload) {
1264 /* no overlap with holes (dup fragment?) */
1268 if (!(ip_off & IP_FLAGS_MFRAG)) {
1269 /* no more fragmentss: truncate this (last) hole */
1270 total_len = start + len;
1271 h->last_byte = start + len;
1275 * There is some overlap: fix the hole list. This code doesn't
1276 * deal with a fragment that overlaps with two different holes
1277 * (thus being a superset of a previously-received fragment).
1280 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
1281 /* complete overlap with hole: remove hole */
1282 if (!h->prev_hole && !h->next_hole) {
1283 /* last remaining hole */
1285 } else if (!h->prev_hole) {
1287 first_hole = h->next_hole;
1288 payload[h->next_hole].prev_hole = 0;
1289 } else if (!h->next_hole) {
1291 payload[h->prev_hole].next_hole = 0;
1293 /* in the middle of the list */
1294 payload[h->next_hole].prev_hole = h->prev_hole;
1295 payload[h->prev_hole].next_hole = h->next_hole;
1298 } else if (h->last_byte <= start + len) {
1299 /* overlaps with final part of the hole: shorten this hole */
1300 h->last_byte = start;
1302 } else if (h >= thisfrag) {
1303 /* overlaps with initial part of the hole: move this hole */
1304 newh = thisfrag + (len / 8);
1308 payload[h->next_hole].prev_hole = (h - payload);
1310 payload[h->prev_hole].next_hole = (h - payload);
1312 first_hole = (h - payload);
1315 /* fragment sits in the middle: split the hole */
1316 newh = thisfrag + (len / 8);
1318 h->last_byte = start;
1319 h->next_hole = (newh - payload);
1320 newh->prev_hole = (h - payload);
1321 if (newh->next_hole)
1322 payload[newh->next_hole].prev_hole = (newh - payload);
1325 /* finally copy this fragment and possibly return whole packet */
1326 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1330 localip->ip_len = htons(total_len);
1331 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1335 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1337 u16 ip_off = ntohs(ip->ip_off);
1338 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1339 return ip; /* not a fragment */
1340 return __NetDefragment(ip, lenp);
1343 #else /* !CONFIG_IP_DEFRAG */
1345 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1347 u16 ip_off = ntohs(ip->ip_off);
1348 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1349 return ip; /* not a fragment */
1355 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1358 * @parma ip IP packet containing the ICMP
1360 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et)
1362 ICMP_t *icmph = (ICMP_t *)&ip->udp_src;
1364 switch (icmph->type) {
1366 if (icmph->code != ICMP_REDIR_HOST)
1368 printf(" ICMP Host Redirect to %pI4 ",
1369 &icmph->un.gateway);
1371 #if defined(CONFIG_CMD_PING)
1372 case ICMP_ECHO_REPLY:
1374 * IP header OK. Pass the packet to the
1378 * XXX point to ip packet - should this use
1379 * packet_icmp_handler?
1381 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1383 case ICMP_ECHO_REQUEST:
1384 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
1385 ETHER_HDR_SIZE + len);
1387 memcpy(&et->et_dest[0], &et->et_src[0], 6);
1388 memcpy(&et->et_src[0], NetOurEther, 6);
1392 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
1393 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1394 ip->ip_sum = ~NetCksum((uchar *)ip,
1395 IP_HDR_SIZE_NO_UDP >> 1);
1397 icmph->type = ICMP_ECHO_REPLY;
1398 icmph->checksum = 0;
1399 icmph->checksum = ~NetCksum((uchar *)icmph,
1400 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1401 (void) eth_send((uchar *)et,
1402 ETHER_HDR_SIZE + len);
1406 #ifdef CONFIG_CMD_TFTPPUT
1407 if (packet_icmp_handler)
1408 packet_icmp_handler(icmph->type, icmph->code,
1409 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
1410 icmph->un.data, ntohs(ip->udp_len));
1417 NetReceive(volatile uchar *inpkt, int len)
1426 #if defined(CONFIG_CMD_CDP)
1429 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1431 debug("packet received\n");
1433 NetRxPacket = inpkt;
1434 NetRxPacketLen = len;
1435 et = (Ethernet_t *)inpkt;
1437 /* too small packet? */
1438 if (len < ETHER_HDR_SIZE)
1443 (*push_packet)(inpkt, len);
1448 #if defined(CONFIG_CMD_CDP)
1449 /* keep track if packet is CDP */
1450 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1453 myvlanid = ntohs(NetOurVLAN);
1454 if (myvlanid == (ushort)-1)
1455 myvlanid = VLAN_NONE;
1456 mynvlanid = ntohs(NetOurNativeVLAN);
1457 if (mynvlanid == (ushort)-1)
1458 mynvlanid = VLAN_NONE;
1460 x = ntohs(et->et_protlen);
1462 debug("packet received\n");
1466 * Got a 802 packet. Check the other protocol field.
1468 x = ntohs(et->et_prot);
1470 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1471 len -= E802_HDR_SIZE;
1473 } else if (x != PROT_VLAN) { /* normal packet */
1474 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1475 len -= ETHER_HDR_SIZE;
1477 } else { /* VLAN packet */
1478 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1480 debug("VLAN packet received\n");
1482 /* too small packet? */
1483 if (len < VLAN_ETHER_HDR_SIZE)
1486 /* if no VLAN active */
1487 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1488 #if defined(CONFIG_CMD_CDP)
1494 cti = ntohs(vet->vet_tag);
1495 vlanid = cti & VLAN_IDMASK;
1496 x = ntohs(vet->vet_type);
1498 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1499 len -= VLAN_ETHER_HDR_SIZE;
1502 debug("Receive from protocol 0x%x\n", x);
1504 #if defined(CONFIG_CMD_CDP)
1506 CDPHandler((uchar *)ip, len);
1511 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1512 if (vlanid == VLAN_NONE)
1513 vlanid = (mynvlanid & VLAN_IDMASK);
1515 if (vlanid != (myvlanid & VLAN_IDMASK))
1523 * We have to deal with two types of ARP packets:
1524 * - REQUEST packets will be answered by sending our
1525 * IP address - if we know it.
1526 * - REPLY packates are expected only after we asked
1527 * for the TFTP server's or the gateway's ethernet
1528 * address; so if we receive such a packet, we set
1529 * the server ethernet address
1534 if (len < ARP_HDR_SIZE) {
1535 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1538 if (ntohs(arp->ar_hrd) != ARP_ETHER)
1540 if (ntohs(arp->ar_pro) != PROT_IP)
1542 if (arp->ar_hln != 6)
1544 if (arp->ar_pln != 4)
1550 if (NetReadIP(&arp->ar_data[16]) != NetOurIP)
1553 switch (ntohs(arp->ar_op)) {
1555 /* reply with our IP address */
1556 debug("Got ARP REQUEST, return our IP\n");
1558 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1559 arp->ar_op = htons(ARPOP_REPLY);
1560 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6);
1561 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1562 memcpy(&arp->ar_data[0], NetOurEther, 6);
1563 NetCopyIP(&arp->ar_data[6], &NetOurIP);
1564 (void) eth_send((uchar *)et,
1565 (pkt - (uchar *)et) + ARP_HDR_SIZE);
1568 case ARPOP_REPLY: /* arp reply */
1569 /* are we waiting for a reply */
1570 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1573 #ifdef CONFIG_KEEP_SERVERADDR
1574 if (NetServerIP == NetArpWaitPacketIP) {
1576 sprintf(buf, "%pM", arp->ar_data);
1577 setenv("serveraddr", buf);
1581 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1584 tmp = NetReadIP(&arp->ar_data[6]);
1586 /* matched waiting packet's address */
1587 if (tmp == NetArpWaitReplyIP) {
1589 /* save address for later use */
1590 memcpy(NetArpWaitPacketMAC,
1591 &arp->ar_data[0], 6);
1593 #ifdef CONFIG_NETCONSOLE
1594 (*packetHandler)(0, 0, 0, 0, 0);
1596 /* modify header, and transmit it */
1597 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1598 (void) eth_send(NetArpWaitTxPacket,
1599 NetArpWaitTxPacketSize);
1601 /* no arp request pending now */
1602 NetArpWaitPacketIP = 0;
1603 NetArpWaitTxPacketSize = 0;
1604 NetArpWaitPacketMAC = NULL;
1609 debug("Unexpected ARP opcode 0x%x\n",
1615 #ifdef CONFIG_CMD_RARP
1617 debug("Got RARP\n");
1619 if (len < ARP_HDR_SIZE) {
1620 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1624 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1625 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1626 (ntohs(arp->ar_pro) != PROT_IP) ||
1627 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1629 puts("invalid RARP header\n");
1631 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1632 if (NetServerIP == 0)
1633 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1634 memcpy(NetServerEther, &arp->ar_data[0], 6);
1636 (*packetHandler)(0, 0, 0, 0, 0);
1642 /* Before we start poking the header, make sure it is there */
1643 if (len < IP_HDR_SIZE) {
1644 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1647 /* Check the packet length */
1648 if (len < ntohs(ip->ip_len)) {
1649 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1652 len = ntohs(ip->ip_len);
1653 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1655 /* Can't deal with anything except IPv4 */
1656 if ((ip->ip_hl_v & 0xf0) != 0x40)
1658 /* Can't deal with IP options (headers != 20 bytes) */
1659 if ((ip->ip_hl_v & 0x0f) > 0x05)
1661 /* Check the Checksum of the header */
1662 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1663 puts("checksum bad\n");
1666 /* If it is not for us, ignore it */
1667 tmp = NetReadIP(&ip->ip_dst);
1668 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1669 #ifdef CONFIG_MCAST_TFTP
1670 if (Mcast_addr != tmp)
1674 /* Read source IP address for later use */
1675 src_ip = NetReadIP(&ip->ip_src);
1677 * The function returns the unchanged packet if it's not
1678 * a fragment, and either the complete packet or NULL if
1679 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1681 ip = NetDefragment(ip, &len);
1685 * watch for ICMP host redirects
1687 * There is no real handler code (yet). We just watch
1688 * for ICMP host redirect messages. In case anybody
1689 * sees these messages: please contact me
1690 * (wd@denx.de), or - even better - send me the
1691 * necessary fixes :-)
1693 * Note: in all cases where I have seen this so far
1694 * it was a problem with the router configuration,
1695 * for instance when a router was configured in the
1696 * BOOTP reply, but the TFTP server was on the same
1697 * subnet. So this is probably a warning that your
1698 * configuration might be wrong. But I'm not really
1699 * sure if there aren't any other situations.
1701 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1702 * we send a tftp packet to a dead connection, or when
1703 * there is no server at the other end.
1705 if (ip->ip_p == IPPROTO_ICMP) {
1706 receive_icmp(ip, len, src_ip, et);
1708 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1712 #ifdef CONFIG_UDP_CHECKSUM
1713 if (ip->udp_xsum != 0) {
1719 xsum += (ntohs(ip->udp_len));
1720 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1721 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1722 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1723 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1725 sumlen = ntohs(ip->udp_len);
1726 sumptr = (ushort *) &(ip->udp_src);
1728 while (sumlen > 1) {
1731 sumdata = *sumptr++;
1732 xsum += ntohs(sumdata);
1738 sumdata = *(unsigned char *) sumptr;
1739 sumdata = (sumdata << 8) & 0xff00;
1742 while ((xsum >> 16) != 0) {
1743 xsum = (xsum & 0x0000ffff) +
1744 ((xsum >> 16) & 0x0000ffff);
1746 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1747 printf(" UDP wrong checksum %08lx %08x\n",
1748 xsum, ntohs(ip->udp_xsum));
1755 #ifdef CONFIG_NETCONSOLE
1756 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1759 ntohs(ip->udp_len) - 8);
1762 * IP header OK. Pass the packet to the current handler.
1764 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1768 ntohs(ip->udp_len) - 8);
1774 /**********************************************************************/
1776 static int net_check_prereq(enum proto_t protocol)
1780 #if defined(CONFIG_CMD_PING)
1782 if (NetPingIP == 0) {
1783 puts("*** ERROR: ping address not given\n");
1788 #if defined(CONFIG_CMD_SNTP)
1790 if (NetNtpServerIP == 0) {
1791 puts("*** ERROR: NTP server address not given\n");
1796 #if defined(CONFIG_CMD_DNS)
1798 if (NetOurDNSIP == 0) {
1799 puts("*** ERROR: DNS server address not given\n");
1804 #if defined(CONFIG_CMD_NFS)
1809 if (NetServerIP == 0) {
1810 puts("*** ERROR: `serverip' not set\n");
1813 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1814 defined(CONFIG_CMD_DNS)
1821 if (NetOurIP == 0) {
1822 puts("*** ERROR: `ipaddr' not set\n");
1827 #ifdef CONFIG_CMD_RARP
1833 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1834 extern int eth_get_dev_index(void);
1835 int num = eth_get_dev_index();
1839 puts("*** ERROR: No ethernet found.\n");
1842 puts("*** ERROR: `ethaddr' not set\n");
1845 printf("*** ERROR: `eth%daddr' not set\n",
1859 /**********************************************************************/
1862 NetCksumOk(uchar *ptr, int len)
1864 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1869 NetCksum(uchar *ptr, int len)
1872 ushort *p = (ushort *)ptr;
1877 xsum = (xsum & 0xffff) + (xsum >> 16);
1878 xsum = (xsum & 0xffff) + (xsum >> 16);
1879 return xsum & 0xffff;
1887 myvlanid = ntohs(NetOurVLAN);
1888 if (myvlanid == (ushort)-1)
1889 myvlanid = VLAN_NONE;
1891 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1892 VLAN_ETHER_HDR_SIZE;
1896 NetSetEther(volatile uchar *xet, uchar * addr, uint prot)
1898 Ethernet_t *et = (Ethernet_t *)xet;
1901 myvlanid = ntohs(NetOurVLAN);
1902 if (myvlanid == (ushort)-1)
1903 myvlanid = VLAN_NONE;
1905 memcpy(et->et_dest, addr, 6);
1906 memcpy(et->et_src, NetOurEther, 6);
1907 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1908 et->et_protlen = htons(prot);
1909 return ETHER_HDR_SIZE;
1911 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1913 vet->vet_vlan_type = htons(PROT_VLAN);
1914 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1915 vet->vet_type = htons(prot);
1916 return VLAN_ETHER_HDR_SIZE;
1921 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len)
1923 IP_t *ip = (IP_t *)xip;
1926 * If the data is an odd number of bytes, zero the
1927 * byte after the last byte so that the checksum
1931 xip[IP_HDR_SIZE + len] = 0;
1934 * Construct an IP and UDP header.
1935 * (need to set no fragment bit - XXX)
1937 /* IP_HDR_SIZE / 4 (not including UDP) */
1940 ip->ip_len = htons(IP_HDR_SIZE + len);
1941 ip->ip_id = htons(NetIPID++);
1942 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1944 ip->ip_p = 17; /* UDP */
1946 /* already in network byte order */
1947 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1949 NetCopyIP((void *)&ip->ip_dst, &dest);
1950 ip->udp_src = htons(sport);
1951 ip->udp_dst = htons(dport);
1952 ip->udp_len = htons(8 + len);
1954 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1957 void copy_filename(char *dst, const char *src, int size)
1959 if (*src && (*src == '"')) {
1964 while ((--size > 0) && *src && (*src != '"'))
1969 #if defined(CONFIG_CMD_NFS) || \
1970 defined(CONFIG_CMD_SNTP) || \
1971 defined(CONFIG_CMD_DNS)
1973 * make port a little random (1024-17407)
1974 * This keeps the math somewhat trivial to compute, and seems to work with
1975 * all supported protocols/clients/servers
1977 unsigned int random_port(void)
1979 return 1024 + (get_timer(0) % 0x4000);
1983 void ip_to_string(IPaddr_t x, char *s)
1986 sprintf(s, "%d.%d.%d.%d",
1987 (int) ((x >> 24) & 0xff),
1988 (int) ((x >> 16) & 0xff),
1989 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1993 void VLAN_to_string(ushort x, char *s)
1997 if (x == (ushort)-1)
2003 sprintf(s, "%d", x & VLAN_IDMASK);
2006 ushort string_to_VLAN(const char *s)
2011 return htons(VLAN_NONE);
2013 if (*s < '0' || *s > '9')
2016 id = (ushort)simple_strtoul(s, NULL, 10);
2021 ushort getenv_VLAN(char *var)
2023 return string_to_VLAN(getenv(var));