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 static rxhand_icmp_f *packet_icmp_handler; /* Current ICMP rx handler */
219 /* Current timeout handler */
220 static thand_f *timeHandler;
221 /* Time base value */
222 static ulong timeStart;
223 /* Current timeout value */
224 static ulong timeDelta;
225 /* THE transmit packet */
226 volatile uchar *NetTxPacket;
228 static int net_check_prereq(proto_t protocol);
230 static int NetTryCount;
232 /**********************************************************************/
234 IPaddr_t NetArpWaitPacketIP;
235 IPaddr_t NetArpWaitReplyIP;
236 /* MAC address of waiting packet's destination */
237 uchar *NetArpWaitPacketMAC;
238 /* THE transmit packet */
239 uchar *NetArpWaitTxPacket;
240 int NetArpWaitTxPacketSize;
241 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
242 ulong NetArpWaitTimerStart;
245 void ArpRequest(void)
251 debug("ARP broadcast %d\n", NetArpWaitTry);
255 pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP);
259 arp->ar_hrd = htons(ARP_ETHER);
260 arp->ar_pro = htons(PROT_IP);
263 arp->ar_op = htons(ARPOP_REQUEST);
266 memcpy(&arp->ar_data[0], NetOurEther, 6);
268 NetWriteIP((uchar *) &arp->ar_data[6], NetOurIP);
269 for (i = 10; i < 16; ++i) {
270 /* dest ET addr = 0 */
274 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
275 (NetOurIP & NetOurSubnetMask)) {
276 if (NetOurGatewayIP == 0) {
277 puts("## Warning: gatewayip needed but not set\n");
278 NetArpWaitReplyIP = NetArpWaitPacketIP;
280 NetArpWaitReplyIP = NetOurGatewayIP;
283 NetArpWaitReplyIP = NetArpWaitPacketIP;
286 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP);
287 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
290 void ArpTimeoutCheck(void)
294 if (!NetArpWaitPacketIP)
299 /* check for arp timeout */
300 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
303 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
304 puts("\nARP Retry count exceeded; starting again\n");
308 NetArpWaitTimerStart = t;
315 NetInitLoop(proto_t protocol)
317 static int env_changed_id;
319 int env_id = get_env_id();
321 /* update only when the environment has changed */
322 if (env_changed_id != env_id) {
323 NetOurIP = getenv_IPaddr("ipaddr");
324 NetCopyIP(&bd->bi_ip_addr, &NetOurIP);
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)
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 */
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)
475 NetBootFileXferSize = 0;
479 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
480 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
481 defined(CONFIG_STATUS_LED) && \
482 defined(STATUS_LED_RED)
484 * Echo the inverted link state to the fault LED.
486 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
487 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
489 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
490 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
491 #endif /* CONFIG_MII, ... */
494 * Main packet reception loop. Loop receiving packets until
495 * someone sets `NetState' to a state that terminates.
499 #ifdef CONFIG_SHOW_ACTIVITY
501 extern void show_activity(int arg);
506 * Check the ethernet for a new packet. The ethernet
507 * receive routine will process it.
512 * Abort if ctrl-c was pressed.
523 * Check for a timeout, and run the timeout handler
526 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
529 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
530 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
531 defined(CONFIG_STATUS_LED) && \
532 defined(STATUS_LED_RED)
534 * Echo the inverted link state to the fault LED.
536 if (miiphy_link(eth_get_dev()->name,
537 CONFIG_SYS_FAULT_MII_ADDR)) {
538 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
540 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
542 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
543 #endif /* CONFIG_MII, ... */
545 timeHandler = (thand_f *)0;
552 case NETLOOP_RESTART:
556 case NETLOOP_SUCCESS:
557 if (NetBootFileXferSize > 0) {
559 printf("Bytes transferred = %ld (%lx hex)\n",
561 NetBootFileXferSize);
562 sprintf(buf, "%lX", NetBootFileXferSize);
563 setenv("filesize", buf);
565 sprintf(buf, "%lX", (unsigned long)load_addr);
566 setenv("fileaddr", buf);
569 ret = NetBootFileXferSize;
578 /* Clear out the handlers */
580 net_set_icmp_handler(NULL);
584 /**********************************************************************/
587 startAgainTimeout(void)
589 NetState = NETLOOP_RESTART;
593 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
594 unsigned src, unsigned len)
596 /* Totally ignore the packet */
599 void NetStartAgain(void)
602 int retry_forever = 0;
603 unsigned long retrycnt = 0;
605 nretry = getenv("netretry");
607 if (!strcmp(nretry, "yes"))
609 else if (!strcmp(nretry, "no"))
611 else if (!strcmp(nretry, "once"))
614 retrycnt = simple_strtoul(nretry, NULL, 0);
618 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
620 NetState = NETLOOP_FAIL;
627 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
628 eth_try_another(!NetRestarted);
631 if (NetRestartWrap) {
634 NetSetTimeout(10000UL, startAgainTimeout);
635 NetSetHandler(startAgainHandler);
637 NetState = NETLOOP_FAIL;
640 NetState = NETLOOP_RESTART;
644 /**********************************************************************/
650 NetSetHandler(rxhand_f *f)
655 void net_set_icmp_handler(rxhand_icmp_f *f)
657 packet_icmp_handler = f;
661 NetSetTimeout(ulong iv, thand_f *f)
664 timeHandler = (thand_f *)0;
667 timeStart = get_timer(0);
674 NetSendPacket(volatile uchar *pkt, int len)
676 (void) eth_send(pkt, len);
680 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
684 /* convert to new style broadcast */
688 /* if broadcast, make the ether address a broadcast and don't do ARP */
689 if (dest == 0xFFFFFFFF)
690 ether = NetBcastAddr;
693 * if MAC address was not discovered yet, save the packet and do
696 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
698 debug("sending ARP for %08lx\n", dest);
700 NetArpWaitPacketIP = dest;
701 NetArpWaitPacketMAC = ether;
703 pkt = NetArpWaitTxPacket;
704 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
706 NetSetIP(pkt, dest, dport, sport, len);
707 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
708 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
710 /* size of the waiting packet */
711 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
714 /* and do the ARP request */
716 NetArpWaitTimerStart = get_timer(0);
718 return 1; /* waiting */
721 debug("sending UDP to %08lx/%pM\n", dest, ether);
723 pkt = (uchar *)NetTxPacket;
724 pkt += NetSetEther(pkt, ether, PROT_IP);
725 NetSetIP(pkt, dest, dport, sport, len);
726 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
728 return 0; /* transmitted */
731 #if defined(CONFIG_CMD_PING)
732 static ushort PingSeqNo;
741 /* XXX always send arp request */
743 memcpy(mac, NetEtherNullAddr, 6);
745 debug("sending ARP for %08lx\n", NetPingIP);
747 NetArpWaitPacketIP = NetPingIP;
748 NetArpWaitPacketMAC = mac;
750 pkt = NetArpWaitTxPacket;
751 pkt += NetSetEther(pkt, mac, PROT_IP);
753 ip = (volatile IP_t *)pkt;
756 * Construct an IP and ICMP header.
757 * (need to set no fragment bit - XXX)
759 /* IP_HDR_SIZE / 4 (not including UDP) */
762 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
763 ip->ip_id = htons(NetIPID++);
764 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
766 ip->ip_p = 0x01; /* ICMP */
768 /* already in network byte order */
769 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
771 NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
772 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
774 s = &ip->udp_src; /* XXX ICMP starts here */
775 s[0] = htons(0x0800); /* echo-request, code */
776 s[1] = 0; /* checksum */
777 s[2] = 0; /* identifier */
778 s[3] = htons(PingSeqNo++); /* sequence number */
779 s[1] = ~NetCksum((uchar *)s, 8/2);
781 /* size of the waiting packet */
782 NetArpWaitTxPacketSize =
783 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
785 /* and do the ARP request */
787 NetArpWaitTimerStart = get_timer(0);
789 return 1; /* waiting */
796 NetState = NETLOOP_FAIL; /* we did not get the reply */
800 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
803 if (sip != NetPingIP)
806 NetState = NETLOOP_SUCCESS;
809 static void PingStart(void)
811 printf("Using %s device\n", eth_get_name());
812 NetSetTimeout(10000UL, PingTimeout);
813 NetSetHandler(PingHandler);
819 #if defined(CONFIG_CMD_CDP)
821 #define CDP_DEVICE_ID_TLV 0x0001
822 #define CDP_ADDRESS_TLV 0x0002
823 #define CDP_PORT_ID_TLV 0x0003
824 #define CDP_CAPABILITIES_TLV 0x0004
825 #define CDP_VERSION_TLV 0x0005
826 #define CDP_PLATFORM_TLV 0x0006
827 #define CDP_NATIVE_VLAN_TLV 0x000a
828 #define CDP_APPLIANCE_VLAN_TLV 0x000e
829 #define CDP_TRIGGER_TLV 0x000f
830 #define CDP_POWER_CONSUMPTION_TLV 0x0010
831 #define CDP_SYSNAME_TLV 0x0014
832 #define CDP_SYSOBJECT_TLV 0x0015
833 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
835 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
840 ushort CDPNativeVLAN;
841 ushort CDPApplianceVLAN;
843 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20,
846 static ushort CDP_compute_csum(const uchar *buff, ushort len)
855 odd = 1 & (ulong)buff;
865 if (result & 0x80000000)
866 result = (result & 0xFFFF) + (result >> 16);
870 leftover = (signed short)(*(const signed char *)buff);
871 /* CISCO SUCKS big time! (and blows too):
872 * CDP uses the IP checksum algorithm with a twist;
873 * for the last byte it *sign* extends and sums.
875 result = (result & 0xffff0000) |
876 ((result + leftover) & 0x0000ffff);
879 result = (result & 0xFFFF) + (result >> 16);
882 result = ((result >> 8) & 0xff) |
883 ((result & 0xff) << 8);
886 /* add up 16-bit and 17-bit words for 17+c bits */
887 result = (result & 0xffff) + (result >> 16);
888 /* add up 16-bit and 2-bit for 16+c bit */
889 result = (result & 0xffff) + (result >> 16);
891 result = (result & 0xffff) + (result >> 16);
894 csum = ~(ushort)result;
896 /* run time endian detection */
897 if (csum != htons(csum)) /* little endian */
903 int CDPSendTrigger(void)
911 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
912 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
917 et = (Ethernet_t *)pkt;
919 /* NOTE: trigger sent not on any VLAN */
921 /* form ethernet header */
922 memcpy(et->et_dest, NetCDPAddr, 6);
923 memcpy(et->et_src, NetOurEther, 6);
925 pkt += ETHER_HDR_SIZE;
928 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
929 pkt += sizeof(CDP_SNAP_hdr);
932 *pkt++ = 0x02; /* CDP version 2 */
933 *pkt++ = 180; /* TTL */
934 s = (volatile ushort *)pkt;
936 /* checksum (0 for later calculation) */
940 #ifdef CONFIG_CDP_DEVICE_ID
941 *s++ = htons(CDP_DEVICE_ID_TLV);
942 *s++ = htons(CONFIG_CDP_DEVICE_ID);
943 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
944 memcpy((uchar *)s, buf, 16);
948 #ifdef CONFIG_CDP_PORT_ID
949 *s++ = htons(CDP_PORT_ID_TLV);
950 memset(buf, 0, sizeof(buf));
951 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
953 if (len & 1) /* make it even */
955 *s++ = htons(len + 4);
956 memcpy((uchar *)s, buf, len);
960 #ifdef CONFIG_CDP_CAPABILITIES
961 *s++ = htons(CDP_CAPABILITIES_TLV);
963 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
967 #ifdef CONFIG_CDP_VERSION
968 *s++ = htons(CDP_VERSION_TLV);
969 memset(buf, 0, sizeof(buf));
970 strcpy(buf, CONFIG_CDP_VERSION);
972 if (len & 1) /* make it even */
974 *s++ = htons(len + 4);
975 memcpy((uchar *)s, buf, len);
979 #ifdef CONFIG_CDP_PLATFORM
980 *s++ = htons(CDP_PLATFORM_TLV);
981 memset(buf, 0, sizeof(buf));
982 strcpy(buf, CONFIG_CDP_PLATFORM);
984 if (len & 1) /* make it even */
986 *s++ = htons(len + 4);
987 memcpy((uchar *)s, buf, len);
991 #ifdef CONFIG_CDP_TRIGGER
992 *s++ = htons(CDP_TRIGGER_TLV);
994 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
998 #ifdef CONFIG_CDP_POWER_CONSUMPTION
999 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
1001 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
1004 /* length of ethernet packet */
1005 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
1006 et->et_protlen = htons(len);
1008 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
1009 chksum = CDP_compute_csum((uchar *)NetTxPacket + len,
1010 (uchar *)s - (NetTxPacket + len));
1013 *cp = htons(chksum);
1015 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
1025 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1030 /* if not OK try again */
1034 NetState = NETLOOP_SUCCESS;
1038 CDPDummyHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
1045 CDPHandler(const uchar *pkt, unsigned len)
1054 if (len < sizeof(CDP_SNAP_hdr) + 4)
1057 /* check for valid CDP SNAP header */
1058 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1061 pkt += sizeof(CDP_SNAP_hdr);
1062 len -= sizeof(CDP_SNAP_hdr);
1064 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1065 if (pkt[0] < 0x02 || pkt[1] == 0)
1069 * if version is greater than 0x02 maybe we'll have a problem;
1073 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1076 if (CDP_compute_csum(pkt, len) != 0)
1088 ss = (const ushort *)pkt;
1089 type = ntohs(ss[0]);
1090 tlen = ntohs(ss[1]);
1097 ss += 2; /* point ss to the data of the TLV */
1101 case CDP_DEVICE_ID_TLV:
1103 case CDP_ADDRESS_TLV:
1105 case CDP_PORT_ID_TLV:
1107 case CDP_CAPABILITIES_TLV:
1109 case CDP_VERSION_TLV:
1111 case CDP_PLATFORM_TLV:
1113 case CDP_NATIVE_VLAN_TLV:
1116 case CDP_APPLIANCE_VLAN_TLV:
1117 t = (const uchar *)ss;
1123 ss = (const ushort *)(t + 1);
1125 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1126 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1129 /* XXX will this work; dunno */
1135 case CDP_TRIGGER_TLV:
1137 case CDP_POWER_CONSUMPTION_TLV:
1139 case CDP_SYSNAME_TLV:
1141 case CDP_SYSOBJECT_TLV:
1143 case CDP_MANAGEMENT_ADDRESS_TLV:
1148 CDPApplianceVLAN = vlan;
1149 CDPNativeVLAN = nvlan;
1155 printf("** CDP packet is too short\n");
1159 static void CDPStart(void)
1161 printf("Using %s device\n", eth_get_name());
1165 CDPNativeVLAN = htons(-1);
1166 CDPApplianceVLAN = htons(-1);
1168 NetSetTimeout(CDP_TIMEOUT, CDPTimeout);
1169 NetSetHandler(CDPDummyHandler);
1175 #ifdef CONFIG_IP_DEFRAG
1177 * This function collects fragments in a single packet, according
1178 * to the algorithm in RFC815. It returns NULL or the pointer to
1179 * a complete packet, in static storage
1181 #ifndef CONFIG_NET_MAXDEFRAG
1182 #define CONFIG_NET_MAXDEFRAG 16384
1185 * MAXDEFRAG, above, is chosen in the config file and is real data
1186 * so we need to add the NFS overhead, which is more than TFTP.
1187 * To use sizeof in the internal unnamed structures, we need a real
1188 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1189 * The compiler doesn't complain nor allocates the actual structure
1191 static struct rpc_t rpc_specimen;
1192 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1194 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1197 * this is the packet being assembled, either data or frag control.
1198 * Fragments go by 8 bytes, so this union must be 8 bytes long
1201 /* first_byte is address of this structure */
1202 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1203 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1204 u16 prev_hole; /* index of prev, 0 == none */
1208 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1210 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1211 static u16 first_hole, total_len;
1212 struct hole *payload, *thisfrag, *h, *newh;
1213 IP_t *localip = (IP_t *)pkt_buff;
1214 uchar *indata = (uchar *)ip;
1215 int offset8, start, len, done = 0;
1216 u16 ip_off = ntohs(ip->ip_off);
1218 /* payload starts after IP header, this fragment is in there */
1219 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1220 offset8 = (ip_off & IP_OFFS);
1221 thisfrag = payload + offset8;
1222 start = offset8 * 8;
1223 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1225 if (start + len > IP_MAXUDP) /* fragment extends too far */
1228 if (!total_len || localip->ip_id != ip->ip_id) {
1229 /* new (or different) packet, reset structs */
1231 payload[0].last_byte = ~0;
1232 payload[0].next_hole = 0;
1233 payload[0].prev_hole = 0;
1235 /* any IP header will work, copy the first we received */
1236 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1240 * What follows is the reassembly algorithm. We use the payload
1241 * array as a linked list of hole descriptors, as each hole starts
1242 * at a multiple of 8 bytes. However, last byte can be whatever value,
1243 * so it is represented as byte count, not as 8-byte blocks.
1246 h = payload + first_hole;
1247 while (h->last_byte < start) {
1248 if (!h->next_hole) {
1249 /* no hole that far away */
1252 h = payload + h->next_hole;
1255 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1256 if (offset8 + ((len + 7) / 8) <= h - payload) {
1257 /* no overlap with holes (dup fragment?) */
1261 if (!(ip_off & IP_FLAGS_MFRAG)) {
1262 /* no more fragmentss: truncate this (last) hole */
1263 total_len = start + len;
1264 h->last_byte = start + len;
1268 * There is some overlap: fix the hole list. This code doesn't
1269 * deal with a fragment that overlaps with two different holes
1270 * (thus being a superset of a previously-received fragment).
1273 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
1274 /* complete overlap with hole: remove hole */
1275 if (!h->prev_hole && !h->next_hole) {
1276 /* last remaining hole */
1278 } else if (!h->prev_hole) {
1280 first_hole = h->next_hole;
1281 payload[h->next_hole].prev_hole = 0;
1282 } else if (!h->next_hole) {
1284 payload[h->prev_hole].next_hole = 0;
1286 /* in the middle of the list */
1287 payload[h->next_hole].prev_hole = h->prev_hole;
1288 payload[h->prev_hole].next_hole = h->next_hole;
1291 } else if (h->last_byte <= start + len) {
1292 /* overlaps with final part of the hole: shorten this hole */
1293 h->last_byte = start;
1295 } else if (h >= thisfrag) {
1296 /* overlaps with initial part of the hole: move this hole */
1297 newh = thisfrag + (len / 8);
1301 payload[h->next_hole].prev_hole = (h - payload);
1303 payload[h->prev_hole].next_hole = (h - payload);
1305 first_hole = (h - payload);
1308 /* fragment sits in the middle: split the hole */
1309 newh = thisfrag + (len / 8);
1311 h->last_byte = start;
1312 h->next_hole = (newh - payload);
1313 newh->prev_hole = (h - payload);
1314 if (newh->next_hole)
1315 payload[newh->next_hole].prev_hole = (newh - payload);
1318 /* finally copy this fragment and possibly return whole packet */
1319 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1323 localip->ip_len = htons(total_len);
1324 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1328 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1330 u16 ip_off = ntohs(ip->ip_off);
1331 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1332 return ip; /* not a fragment */
1333 return __NetDefragment(ip, lenp);
1336 #else /* !CONFIG_IP_DEFRAG */
1338 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1340 u16 ip_off = ntohs(ip->ip_off);
1341 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1342 return ip; /* not a fragment */
1348 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1351 * @parma ip IP packet containing the ICMP
1353 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et)
1355 ICMP_t *icmph = (ICMP_t *)&ip->udp_src;
1357 switch (icmph->type) {
1359 if (icmph->code != ICMP_REDIR_HOST)
1361 printf(" ICMP Host Redirect to %pI4 ",
1362 &icmph->un.gateway);
1364 #if defined(CONFIG_CMD_PING)
1365 case ICMP_ECHO_REPLY:
1367 * IP header OK. Pass the packet to the
1371 * XXX point to ip packet - should this use
1372 * packet_icmp_handler?
1374 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1376 case ICMP_ECHO_REQUEST:
1377 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
1378 ETHER_HDR_SIZE + len);
1380 memcpy(&et->et_dest[0], &et->et_src[0], 6);
1381 memcpy(&et->et_src[0], NetOurEther, 6);
1385 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
1386 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1387 ip->ip_sum = ~NetCksum((uchar *)ip,
1388 IP_HDR_SIZE_NO_UDP >> 1);
1390 icmph->type = ICMP_ECHO_REPLY;
1391 icmph->checksum = 0;
1392 icmph->checksum = ~NetCksum((uchar *)icmph,
1393 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1394 (void) eth_send((uchar *)et,
1395 ETHER_HDR_SIZE + len);
1399 if (packet_icmp_handler)
1400 packet_icmp_handler(icmph->type, icmph->code,
1401 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
1402 icmph->un.data, ntohs(ip->udp_len));
1408 NetReceive(volatile uchar *inpkt, int len)
1417 #if defined(CONFIG_CMD_CDP)
1420 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1422 debug("packet received\n");
1424 NetRxPacket = inpkt;
1425 NetRxPacketLen = len;
1426 et = (Ethernet_t *)inpkt;
1428 /* too small packet? */
1429 if (len < ETHER_HDR_SIZE)
1434 (*push_packet)(inpkt, len);
1439 #if defined(CONFIG_CMD_CDP)
1440 /* keep track if packet is CDP */
1441 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1444 myvlanid = ntohs(NetOurVLAN);
1445 if (myvlanid == (ushort)-1)
1446 myvlanid = VLAN_NONE;
1447 mynvlanid = ntohs(NetOurNativeVLAN);
1448 if (mynvlanid == (ushort)-1)
1449 mynvlanid = VLAN_NONE;
1451 x = ntohs(et->et_protlen);
1453 debug("packet received\n");
1457 * Got a 802 packet. Check the other protocol field.
1459 x = ntohs(et->et_prot);
1461 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1462 len -= E802_HDR_SIZE;
1464 } else if (x != PROT_VLAN) { /* normal packet */
1465 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1466 len -= ETHER_HDR_SIZE;
1468 } else { /* VLAN packet */
1469 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1471 debug("VLAN packet received\n");
1473 /* too small packet? */
1474 if (len < VLAN_ETHER_HDR_SIZE)
1477 /* if no VLAN active */
1478 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1479 #if defined(CONFIG_CMD_CDP)
1485 cti = ntohs(vet->vet_tag);
1486 vlanid = cti & VLAN_IDMASK;
1487 x = ntohs(vet->vet_type);
1489 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1490 len -= VLAN_ETHER_HDR_SIZE;
1493 debug("Receive from protocol 0x%x\n", x);
1495 #if defined(CONFIG_CMD_CDP)
1497 CDPHandler((uchar *)ip, len);
1502 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1503 if (vlanid == VLAN_NONE)
1504 vlanid = (mynvlanid & VLAN_IDMASK);
1506 if (vlanid != (myvlanid & VLAN_IDMASK))
1514 * We have to deal with two types of ARP packets:
1515 * - REQUEST packets will be answered by sending our
1516 * IP address - if we know it.
1517 * - REPLY packates are expected only after we asked
1518 * for the TFTP server's or the gateway's ethernet
1519 * address; so if we receive such a packet, we set
1520 * the server ethernet address
1525 if (len < ARP_HDR_SIZE) {
1526 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1529 if (ntohs(arp->ar_hrd) != ARP_ETHER)
1531 if (ntohs(arp->ar_pro) != PROT_IP)
1533 if (arp->ar_hln != 6)
1535 if (arp->ar_pln != 4)
1541 if (NetReadIP(&arp->ar_data[16]) != NetOurIP)
1544 switch (ntohs(arp->ar_op)) {
1546 /* reply with our IP address */
1547 debug("Got ARP REQUEST, return our IP\n");
1549 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1550 arp->ar_op = htons(ARPOP_REPLY);
1551 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6);
1552 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1553 memcpy(&arp->ar_data[0], NetOurEther, 6);
1554 NetCopyIP(&arp->ar_data[6], &NetOurIP);
1555 (void) eth_send((uchar *)et,
1556 (pkt - (uchar *)et) + ARP_HDR_SIZE);
1559 case ARPOP_REPLY: /* arp reply */
1560 /* are we waiting for a reply */
1561 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1564 #ifdef CONFIG_KEEP_SERVERADDR
1565 if (NetServerIP == NetArpWaitPacketIP) {
1567 sprintf(buf, "%pM", arp->ar_data);
1568 setenv("serveraddr", buf);
1572 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1575 tmp = NetReadIP(&arp->ar_data[6]);
1577 /* matched waiting packet's address */
1578 if (tmp == NetArpWaitReplyIP) {
1580 /* save address for later use */
1581 memcpy(NetArpWaitPacketMAC,
1582 &arp->ar_data[0], 6);
1584 #ifdef CONFIG_NETCONSOLE
1585 (*packetHandler)(0, 0, 0, 0, 0);
1587 /* modify header, and transmit it */
1588 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1589 (void) eth_send(NetArpWaitTxPacket,
1590 NetArpWaitTxPacketSize);
1592 /* no arp request pending now */
1593 NetArpWaitPacketIP = 0;
1594 NetArpWaitTxPacketSize = 0;
1595 NetArpWaitPacketMAC = NULL;
1600 debug("Unexpected ARP opcode 0x%x\n",
1606 #ifdef CONFIG_CMD_RARP
1608 debug("Got RARP\n");
1610 if (len < ARP_HDR_SIZE) {
1611 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1615 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1616 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1617 (ntohs(arp->ar_pro) != PROT_IP) ||
1618 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1620 puts("invalid RARP header\n");
1622 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1623 if (NetServerIP == 0)
1624 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1625 memcpy(NetServerEther, &arp->ar_data[0], 6);
1627 (*packetHandler)(0, 0, 0, 0, 0);
1633 /* Before we start poking the header, make sure it is there */
1634 if (len < IP_HDR_SIZE) {
1635 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1638 /* Check the packet length */
1639 if (len < ntohs(ip->ip_len)) {
1640 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1643 len = ntohs(ip->ip_len);
1644 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1646 /* Can't deal with anything except IPv4 */
1647 if ((ip->ip_hl_v & 0xf0) != 0x40)
1649 /* Can't deal with IP options (headers != 20 bytes) */
1650 if ((ip->ip_hl_v & 0x0f) > 0x05)
1652 /* Check the Checksum of the header */
1653 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1654 puts("checksum bad\n");
1657 /* If it is not for us, ignore it */
1658 tmp = NetReadIP(&ip->ip_dst);
1659 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1660 #ifdef CONFIG_MCAST_TFTP
1661 if (Mcast_addr != tmp)
1665 /* Read source IP address for later use */
1666 src_ip = NetReadIP(&ip->ip_src);
1668 * The function returns the unchanged packet if it's not
1669 * a fragment, and either the complete packet or NULL if
1670 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1672 ip = NetDefragment(ip, &len);
1676 * watch for ICMP host redirects
1678 * There is no real handler code (yet). We just watch
1679 * for ICMP host redirect messages. In case anybody
1680 * sees these messages: please contact me
1681 * (wd@denx.de), or - even better - send me the
1682 * necessary fixes :-)
1684 * Note: in all cases where I have seen this so far
1685 * it was a problem with the router configuration,
1686 * for instance when a router was configured in the
1687 * BOOTP reply, but the TFTP server was on the same
1688 * subnet. So this is probably a warning that your
1689 * configuration might be wrong. But I'm not really
1690 * sure if there aren't any other situations.
1692 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1693 * we send a tftp packet to a dead connection, or when
1694 * there is no server at the other end.
1696 if (ip->ip_p == IPPROTO_ICMP) {
1697 receive_icmp(ip, len, src_ip, et);
1699 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1703 #ifdef CONFIG_UDP_CHECKSUM
1704 if (ip->udp_xsum != 0) {
1710 xsum += (ntohs(ip->udp_len));
1711 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1712 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1713 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1714 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1716 sumlen = ntohs(ip->udp_len);
1717 sumptr = (ushort *) &(ip->udp_src);
1719 while (sumlen > 1) {
1722 sumdata = *sumptr++;
1723 xsum += ntohs(sumdata);
1729 sumdata = *(unsigned char *) sumptr;
1730 sumdata = (sumdata << 8) & 0xff00;
1733 while ((xsum >> 16) != 0) {
1734 xsum = (xsum & 0x0000ffff) +
1735 ((xsum >> 16) & 0x0000ffff);
1737 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1738 printf(" UDP wrong checksum %08lx %08x\n",
1739 xsum, ntohs(ip->udp_xsum));
1746 #ifdef CONFIG_NETCONSOLE
1747 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1750 ntohs(ip->udp_len) - 8);
1753 * IP header OK. Pass the packet to the current handler.
1755 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1759 ntohs(ip->udp_len) - 8);
1765 /**********************************************************************/
1767 static int net_check_prereq(proto_t protocol)
1771 #if defined(CONFIG_CMD_PING)
1773 if (NetPingIP == 0) {
1774 puts("*** ERROR: ping address not given\n");
1779 #if defined(CONFIG_CMD_SNTP)
1781 if (NetNtpServerIP == 0) {
1782 puts("*** ERROR: NTP server address not given\n");
1787 #if defined(CONFIG_CMD_DNS)
1789 if (NetOurDNSIP == 0) {
1790 puts("*** ERROR: DNS server address not given\n");
1795 #if defined(CONFIG_CMD_NFS)
1799 if (NetServerIP == 0) {
1800 puts("*** ERROR: `serverip' not set\n");
1803 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1804 defined(CONFIG_CMD_DNS)
1811 if (NetOurIP == 0) {
1812 puts("*** ERROR: `ipaddr' not set\n");
1817 #ifdef CONFIG_CMD_RARP
1823 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1824 extern int eth_get_dev_index(void);
1825 int num = eth_get_dev_index();
1829 puts("*** ERROR: No ethernet found.\n");
1832 puts("*** ERROR: `ethaddr' not set\n");
1835 printf("*** ERROR: `eth%daddr' not set\n",
1849 /**********************************************************************/
1852 NetCksumOk(uchar *ptr, int len)
1854 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1859 NetCksum(uchar *ptr, int len)
1862 ushort *p = (ushort *)ptr;
1867 xsum = (xsum & 0xffff) + (xsum >> 16);
1868 xsum = (xsum & 0xffff) + (xsum >> 16);
1869 return xsum & 0xffff;
1877 myvlanid = ntohs(NetOurVLAN);
1878 if (myvlanid == (ushort)-1)
1879 myvlanid = VLAN_NONE;
1881 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1882 VLAN_ETHER_HDR_SIZE;
1886 NetSetEther(volatile uchar *xet, uchar * addr, uint prot)
1888 Ethernet_t *et = (Ethernet_t *)xet;
1891 myvlanid = ntohs(NetOurVLAN);
1892 if (myvlanid == (ushort)-1)
1893 myvlanid = VLAN_NONE;
1895 memcpy(et->et_dest, addr, 6);
1896 memcpy(et->et_src, NetOurEther, 6);
1897 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1898 et->et_protlen = htons(prot);
1899 return ETHER_HDR_SIZE;
1901 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1903 vet->vet_vlan_type = htons(PROT_VLAN);
1904 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1905 vet->vet_type = htons(prot);
1906 return VLAN_ETHER_HDR_SIZE;
1911 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len)
1913 IP_t *ip = (IP_t *)xip;
1916 * If the data is an odd number of bytes, zero the
1917 * byte after the last byte so that the checksum
1921 xip[IP_HDR_SIZE + len] = 0;
1924 * Construct an IP and UDP header.
1925 * (need to set no fragment bit - XXX)
1927 /* IP_HDR_SIZE / 4 (not including UDP) */
1930 ip->ip_len = htons(IP_HDR_SIZE + len);
1931 ip->ip_id = htons(NetIPID++);
1932 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1934 ip->ip_p = 17; /* UDP */
1936 /* already in network byte order */
1937 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1939 NetCopyIP((void *)&ip->ip_dst, &dest);
1940 ip->udp_src = htons(sport);
1941 ip->udp_dst = htons(dport);
1942 ip->udp_len = htons(8 + len);
1944 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1947 void copy_filename(char *dst, const char *src, int size)
1949 if (*src && (*src == '"')) {
1954 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));