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
80 #include <linux/compiler.h>
85 #ifdef CONFIG_CMD_RARP
89 #ifdef CONFIG_STATUS_LED
90 #include <status_led.h>
93 #if defined(CONFIG_CMD_SNTP)
97 #if defined(CONFIG_CMD_DNS)
101 DECLARE_GLOBAL_DATA_PTR;
103 /** BOOTP EXTENTIONS **/
105 /* Our subnet mask (0=unknown) */
106 IPaddr_t NetOurSubnetMask;
107 /* Our gateways IP address */
108 IPaddr_t NetOurGatewayIP;
109 /* Our DNS IP address */
110 IPaddr_t NetOurDNSIP;
111 #if defined(CONFIG_BOOTP_DNS2)
112 /* Our 2nd DNS IP address */
113 IPaddr_t NetOurDNS2IP;
116 char NetOurNISDomain[32] = {0,};
118 char NetOurHostName[32] = {0,};
120 char NetOurRootPath[64] = {0,};
121 /* Our bootfile size in blocks */
122 ushort NetBootFileSize;
124 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
128 /** END OF BOOTP EXTENTIONS **/
130 /* The actual transferred size of the bootfile (in bytes) */
131 ulong NetBootFileXferSize;
132 /* Our ethernet address */
133 uchar NetOurEther[6];
134 /* Boot server enet address */
135 uchar NetServerEther[6];
136 /* Our IP addr (0 = unknown) */
138 /* Server IP addr (0 = unknown) */
139 IPaddr_t NetServerIP;
140 /* Current receive packet */
142 /* Current rx packet length */
146 /* Ethernet bcast address */
147 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
148 uchar NetEtherNullAddr[6];
150 void (*push_packet)(void *, int len) = 0;
152 /* Network loop state */
154 /* Tried all network devices */
156 /* Network loop restarted */
157 static int NetRestarted;
158 /* At least one device configured */
159 static int NetDevExists;
161 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
162 /* default is without VLAN */
163 ushort NetOurVLAN = 0xFFFF;
165 ushort NetOurNativeVLAN = 0xFFFF;
170 #if defined(CONFIG_CMD_PING)
171 /* the ip address to ping */
174 static void PingStart(void);
177 #if defined(CONFIG_CMD_SNTP)
178 /* NTP server IP address */
179 IPaddr_t NetNtpServerIP;
180 /* offset time from UTC */
184 uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
187 uchar *NetRxPackets[PKTBUFSRX];
189 /* Current RX packet handler */
190 static rxhand_f *packetHandler;
191 #ifdef CONFIG_CMD_TFTPPUT
192 static rxhand_icmp_f *packet_icmp_handler; /* Current ICMP rx handler */
194 /* Current timeout handler */
195 static thand_f *timeHandler;
196 /* Time base value */
197 static ulong timeStart;
198 /* Current timeout value */
199 static ulong timeDelta;
200 /* THE transmit packet */
203 static int net_check_prereq(enum proto_t protocol);
205 static int NetTryCount;
207 /**********************************************************************/
210 * Check if autoload is enabled. If so, use either NFS or TFTP to download
213 void net_auto_load(void)
215 const char *s = getenv("autoload");
220 * Just use BOOTP/RARP to configure system;
221 * Do not use TFTP to load the bootfile.
223 NetState = NETLOOP_SUCCESS;
226 #if defined(CONFIG_CMD_NFS)
227 if (strcmp(s, "NFS") == 0) {
229 * Use NFS to load the bootfile.
239 static void NetInitLoop(enum proto_t protocol)
241 static int env_changed_id;
242 int env_id = get_env_id();
244 /* update only when the environment has changed */
245 if (env_changed_id != env_id) {
246 NetOurIP = getenv_IPaddr("ipaddr");
247 NetOurGatewayIP = getenv_IPaddr("gatewayip");
248 NetOurSubnetMask = getenv_IPaddr("netmask");
249 NetServerIP = getenv_IPaddr("serverip");
250 NetOurNativeVLAN = getenv_VLAN("nvlan");
251 NetOurVLAN = getenv_VLAN("vlan");
252 #if defined(CONFIG_CMD_DNS)
253 NetOurDNSIP = getenv_IPaddr("dnsip");
255 env_changed_id = env_id;
261 /**********************************************************************/
263 * Main network processing loop.
266 int NetLoop(enum proto_t protocol)
282 * Setup packet buffers, aligned correctly.
284 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
285 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
286 for (i = 0; i < PKTBUFSRX; i++)
287 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
290 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
293 if (eth_init(bd) < 0) {
299 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
301 NetState = NETLOOP_CONTINUE;
304 * Start the ball rolling with the given start function. From
305 * here on, this code is a state machine driven by received
306 * packets and timer events.
308 NetInitLoop(protocol);
310 switch (net_check_prereq(protocol)) {
312 /* network not configured */
317 /* network device not configured */
322 NetBootFileXferSize = 0;
325 #ifdef CONFIG_CMD_TFTPPUT
328 /* always use ARP to get server ethernet address */
331 #ifdef CONFIG_CMD_TFTPSRV
336 #if defined(CONFIG_CMD_DHCP)
340 DhcpRequest(); /* Basically same as BOOTP */
350 #if defined(CONFIG_CMD_RARP)
357 #if defined(CONFIG_CMD_PING)
362 #if defined(CONFIG_CMD_NFS)
367 #if defined(CONFIG_CMD_CDP)
372 #ifdef CONFIG_NETCONSOLE
377 #if defined(CONFIG_CMD_SNTP)
382 #if defined(CONFIG_CMD_DNS)
394 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
395 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
396 defined(CONFIG_STATUS_LED) && \
397 defined(STATUS_LED_RED)
399 * Echo the inverted link state to the fault LED.
401 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
402 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
404 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
405 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
406 #endif /* CONFIG_MII, ... */
409 * Main packet reception loop. Loop receiving packets until
410 * someone sets `NetState' to a state that terminates.
414 #ifdef CONFIG_SHOW_ACTIVITY
418 * Check the ethernet for a new packet. The ethernet
419 * receive routine will process it.
424 * Abort if ctrl-c was pressed.
435 * Check for a timeout, and run the timeout handler
438 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
441 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
442 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
443 defined(CONFIG_STATUS_LED) && \
444 defined(STATUS_LED_RED)
446 * Echo the inverted link state to the fault LED.
448 if (miiphy_link(eth_get_dev()->name,
449 CONFIG_SYS_FAULT_MII_ADDR)) {
450 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
452 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
454 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
455 #endif /* CONFIG_MII, ... */
457 timeHandler = (thand_f *)0;
464 case NETLOOP_RESTART:
468 case NETLOOP_SUCCESS:
469 if (NetBootFileXferSize > 0) {
471 printf("Bytes transferred = %ld (%lx hex)\n",
473 NetBootFileXferSize);
474 sprintf(buf, "%lX", NetBootFileXferSize);
475 setenv("filesize", buf);
477 sprintf(buf, "%lX", (unsigned long)load_addr);
478 setenv("fileaddr", buf);
481 ret = NetBootFileXferSize;
490 #ifdef CONFIG_CMD_TFTPPUT
491 /* Clear out the handlers */
493 net_set_icmp_handler(NULL);
498 /**********************************************************************/
501 startAgainTimeout(void)
503 NetState = NETLOOP_RESTART;
507 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
508 unsigned src, unsigned len)
510 /* Totally ignore the packet */
513 void NetStartAgain(void)
516 int retry_forever = 0;
517 unsigned long retrycnt = 0;
519 nretry = getenv("netretry");
521 if (!strcmp(nretry, "yes"))
523 else if (!strcmp(nretry, "no"))
525 else if (!strcmp(nretry, "once"))
528 retrycnt = simple_strtoul(nretry, NULL, 0);
532 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
534 NetState = NETLOOP_FAIL;
541 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
542 eth_try_another(!NetRestarted);
545 if (NetRestartWrap) {
548 NetSetTimeout(10000UL, startAgainTimeout);
549 NetSetHandler(startAgainHandler);
551 NetState = NETLOOP_FAIL;
554 NetState = NETLOOP_RESTART;
558 /**********************************************************************/
566 return packetHandler;
571 NetSetHandler(rxhand_f *f)
576 #ifdef CONFIG_CMD_TFTPPUT
577 void net_set_icmp_handler(rxhand_icmp_f *f)
579 packet_icmp_handler = f;
584 NetSetTimeout(ulong iv, thand_f *f)
587 timeHandler = (thand_f *)0;
590 timeStart = get_timer(0);
597 NetSendPacket(uchar *pkt, int len)
599 (void) eth_send(pkt, len);
603 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
607 /* convert to new style broadcast */
611 /* if broadcast, make the ether address a broadcast and don't do ARP */
612 if (dest == 0xFFFFFFFF)
613 ether = NetBcastAddr;
616 * if MAC address was not discovered yet, save the packet and do
619 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
621 debug("sending ARP for %08x\n", dest);
623 NetArpWaitPacketIP = dest;
624 NetArpWaitPacketMAC = ether;
626 pkt = NetArpWaitTxPacket;
627 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP);
629 NetSetIP(pkt, dest, dport, sport, len);
630 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket +
631 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
633 /* size of the waiting packet */
634 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) +
637 /* and do the ARP request */
639 NetArpWaitTimerStart = get_timer(0);
641 return 1; /* waiting */
644 debug("sending UDP to %08x/%pM\n", dest, ether);
646 pkt = (uchar *)NetTxPacket;
647 pkt += NetSetEther(pkt, ether, PROT_IP);
648 NetSetIP(pkt, dest, dport, sport, len);
649 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
651 return 0; /* transmitted */
654 #if defined(CONFIG_CMD_PING)
655 static ushort PingSeqNo;
664 /* XXX always send arp request */
666 memcpy(mac, NetEtherNullAddr, 6);
668 debug("sending ARP for %08x\n", NetPingIP);
670 NetArpWaitPacketIP = NetPingIP;
671 NetArpWaitPacketMAC = mac;
673 pkt = NetArpWaitTxPacket;
674 pkt += NetSetEther(pkt, mac, PROT_IP);
679 * Construct an IP and ICMP header.
680 * (need to set no fragment bit - XXX)
682 /* IP_HDR_SIZE / 4 (not including UDP) */
685 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
686 ip->ip_id = htons(NetIPID++);
687 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
689 ip->ip_p = 0x01; /* ICMP */
691 /* already in network byte order */
692 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
694 NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
695 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
697 s = &ip->udp_src; /* XXX ICMP starts here */
698 s[0] = htons(0x0800); /* echo-request, code */
699 s[1] = 0; /* checksum */
700 s[2] = 0; /* identifier */
701 s[3] = htons(PingSeqNo++); /* sequence number */
702 s[1] = ~NetCksum((uchar *)s, 8/2);
704 /* size of the waiting packet */
705 NetArpWaitTxPacketSize =
706 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
708 /* and do the ARP request */
710 NetArpWaitTimerStart = get_timer(0);
712 return 1; /* waiting */
719 NetState = NETLOOP_FAIL; /* we did not get the reply */
723 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
726 if (sip != NetPingIP)
729 NetState = NETLOOP_SUCCESS;
732 static void PingStart(void)
734 printf("Using %s device\n", eth_get_name());
735 NetSetTimeout(10000UL, PingTimeout);
736 NetSetHandler(PingHandler);
742 #ifdef CONFIG_IP_DEFRAG
744 * This function collects fragments in a single packet, according
745 * to the algorithm in RFC815. It returns NULL or the pointer to
746 * a complete packet, in static storage
748 #ifndef CONFIG_NET_MAXDEFRAG
749 #define CONFIG_NET_MAXDEFRAG 16384
752 * MAXDEFRAG, above, is chosen in the config file and is real data
753 * so we need to add the NFS overhead, which is more than TFTP.
754 * To use sizeof in the internal unnamed structures, we need a real
755 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
756 * The compiler doesn't complain nor allocates the actual structure
758 static struct rpc_t rpc_specimen;
759 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
761 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
764 * this is the packet being assembled, either data or frag control.
765 * Fragments go by 8 bytes, so this union must be 8 bytes long
768 /* first_byte is address of this structure */
769 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
770 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
771 u16 prev_hole; /* index of prev, 0 == none */
775 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
777 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
778 static u16 first_hole, total_len;
779 struct hole *payload, *thisfrag, *h, *newh;
780 IP_t *localip = (IP_t *)pkt_buff;
781 uchar *indata = (uchar *)ip;
782 int offset8, start, len, done = 0;
783 u16 ip_off = ntohs(ip->ip_off);
785 /* payload starts after IP header, this fragment is in there */
786 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
787 offset8 = (ip_off & IP_OFFS);
788 thisfrag = payload + offset8;
790 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
792 if (start + len > IP_MAXUDP) /* fragment extends too far */
795 if (!total_len || localip->ip_id != ip->ip_id) {
796 /* new (or different) packet, reset structs */
798 payload[0].last_byte = ~0;
799 payload[0].next_hole = 0;
800 payload[0].prev_hole = 0;
802 /* any IP header will work, copy the first we received */
803 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
807 * What follows is the reassembly algorithm. We use the payload
808 * array as a linked list of hole descriptors, as each hole starts
809 * at a multiple of 8 bytes. However, last byte can be whatever value,
810 * so it is represented as byte count, not as 8-byte blocks.
813 h = payload + first_hole;
814 while (h->last_byte < start) {
816 /* no hole that far away */
819 h = payload + h->next_hole;
822 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
823 if (offset8 + ((len + 7) / 8) <= h - payload) {
824 /* no overlap with holes (dup fragment?) */
828 if (!(ip_off & IP_FLAGS_MFRAG)) {
829 /* no more fragmentss: truncate this (last) hole */
830 total_len = start + len;
831 h->last_byte = start + len;
835 * There is some overlap: fix the hole list. This code doesn't
836 * deal with a fragment that overlaps with two different holes
837 * (thus being a superset of a previously-received fragment).
840 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
841 /* complete overlap with hole: remove hole */
842 if (!h->prev_hole && !h->next_hole) {
843 /* last remaining hole */
845 } else if (!h->prev_hole) {
847 first_hole = h->next_hole;
848 payload[h->next_hole].prev_hole = 0;
849 } else if (!h->next_hole) {
851 payload[h->prev_hole].next_hole = 0;
853 /* in the middle of the list */
854 payload[h->next_hole].prev_hole = h->prev_hole;
855 payload[h->prev_hole].next_hole = h->next_hole;
858 } else if (h->last_byte <= start + len) {
859 /* overlaps with final part of the hole: shorten this hole */
860 h->last_byte = start;
862 } else if (h >= thisfrag) {
863 /* overlaps with initial part of the hole: move this hole */
864 newh = thisfrag + (len / 8);
868 payload[h->next_hole].prev_hole = (h - payload);
870 payload[h->prev_hole].next_hole = (h - payload);
872 first_hole = (h - payload);
875 /* fragment sits in the middle: split the hole */
876 newh = thisfrag + (len / 8);
878 h->last_byte = start;
879 h->next_hole = (newh - payload);
880 newh->prev_hole = (h - payload);
882 payload[newh->next_hole].prev_hole = (newh - payload);
885 /* finally copy this fragment and possibly return whole packet */
886 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
890 localip->ip_len = htons(total_len);
891 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
895 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
897 u16 ip_off = ntohs(ip->ip_off);
898 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
899 return ip; /* not a fragment */
900 return __NetDefragment(ip, lenp);
903 #else /* !CONFIG_IP_DEFRAG */
905 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
907 u16 ip_off = ntohs(ip->ip_off);
908 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
909 return ip; /* not a fragment */
915 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
918 * @parma ip IP packet containing the ICMP
920 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et)
922 ICMP_t *icmph = (ICMP_t *)&ip->udp_src;
924 switch (icmph->type) {
926 if (icmph->code != ICMP_REDIR_HOST)
928 printf(" ICMP Host Redirect to %pI4 ",
931 #if defined(CONFIG_CMD_PING)
932 case ICMP_ECHO_REPLY:
934 * IP header OK. Pass the packet to the
938 * XXX point to ip packet - should this use
939 * packet_icmp_handler?
941 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
943 case ICMP_ECHO_REQUEST:
944 debug("Got ICMP ECHO REQUEST, return %d bytes\n",
945 ETHER_HDR_SIZE + len);
947 memcpy(&et->et_dest[0], &et->et_src[0], 6);
948 memcpy(&et->et_src[0], NetOurEther, 6);
952 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
953 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
954 ip->ip_sum = ~NetCksum((uchar *)ip,
955 IP_HDR_SIZE_NO_UDP >> 1);
957 icmph->type = ICMP_ECHO_REPLY;
959 icmph->checksum = ~NetCksum((uchar *)icmph,
960 (len - IP_HDR_SIZE_NO_UDP) >> 1);
961 (void) eth_send((uchar *)et,
962 ETHER_HDR_SIZE + len);
966 #ifdef CONFIG_CMD_TFTPPUT
967 if (packet_icmp_handler)
968 packet_icmp_handler(icmph->type, icmph->code,
969 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
970 icmph->un.data, ntohs(ip->udp_len));
977 NetReceive(uchar *inpkt, int len)
981 #ifdef CONFIG_CMD_RARP
987 #if defined(CONFIG_CMD_CDP)
990 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
992 debug("packet received\n");
995 NetRxPacketLen = len;
996 et = (Ethernet_t *)inpkt;
998 /* too small packet? */
999 if (len < ETHER_HDR_SIZE)
1004 (*push_packet)(inpkt, len);
1009 #if defined(CONFIG_CMD_CDP)
1010 /* keep track if packet is CDP */
1011 iscdp = is_cdp_packet(et->et_dest);
1014 myvlanid = ntohs(NetOurVLAN);
1015 if (myvlanid == (ushort)-1)
1016 myvlanid = VLAN_NONE;
1017 mynvlanid = ntohs(NetOurNativeVLAN);
1018 if (mynvlanid == (ushort)-1)
1019 mynvlanid = VLAN_NONE;
1021 x = ntohs(et->et_protlen);
1023 debug("packet received\n");
1027 * Got a 802 packet. Check the other protocol field.
1029 x = ntohs(et->et_prot);
1031 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1032 len -= E802_HDR_SIZE;
1034 } else if (x != PROT_VLAN) { /* normal packet */
1035 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1036 len -= ETHER_HDR_SIZE;
1038 } else { /* VLAN packet */
1039 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1041 debug("VLAN packet received\n");
1043 /* too small packet? */
1044 if (len < VLAN_ETHER_HDR_SIZE)
1047 /* if no VLAN active */
1048 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1049 #if defined(CONFIG_CMD_CDP)
1055 cti = ntohs(vet->vet_tag);
1056 vlanid = cti & VLAN_IDMASK;
1057 x = ntohs(vet->vet_type);
1059 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1060 len -= VLAN_ETHER_HDR_SIZE;
1063 debug("Receive from protocol 0x%x\n", x);
1065 #if defined(CONFIG_CMD_CDP)
1067 CDPHandler((uchar *)ip, len);
1072 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1073 if (vlanid == VLAN_NONE)
1074 vlanid = (mynvlanid & VLAN_IDMASK);
1076 if (vlanid != (myvlanid & VLAN_IDMASK))
1083 ArpReceive(et, ip, len);
1086 #ifdef CONFIG_CMD_RARP
1088 debug("Got RARP\n");
1090 if (len < ARP_HDR_SIZE) {
1091 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1095 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1096 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1097 (ntohs(arp->ar_pro) != PROT_IP) ||
1098 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1100 puts("invalid RARP header\n");
1102 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1103 if (NetServerIP == 0)
1104 NetCopyIP(&NetServerIP, &arp->ar_data[6]);
1105 memcpy(NetServerEther, &arp->ar_data[0], 6);
1107 (*packetHandler)(0, 0, 0, 0, 0);
1113 /* Before we start poking the header, make sure it is there */
1114 if (len < IP_HDR_SIZE) {
1115 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1118 /* Check the packet length */
1119 if (len < ntohs(ip->ip_len)) {
1120 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1123 len = ntohs(ip->ip_len);
1124 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1126 /* Can't deal with anything except IPv4 */
1127 if ((ip->ip_hl_v & 0xf0) != 0x40)
1129 /* Can't deal with IP options (headers != 20 bytes) */
1130 if ((ip->ip_hl_v & 0x0f) > 0x05)
1132 /* Check the Checksum of the header */
1133 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1134 puts("checksum bad\n");
1137 /* If it is not for us, ignore it */
1138 tmp = NetReadIP(&ip->ip_dst);
1139 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1140 #ifdef CONFIG_MCAST_TFTP
1141 if (Mcast_addr != tmp)
1145 /* Read source IP address for later use */
1146 src_ip = NetReadIP(&ip->ip_src);
1148 * The function returns the unchanged packet if it's not
1149 * a fragment, and either the complete packet or NULL if
1150 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1152 ip = NetDefragment(ip, &len);
1156 * watch for ICMP host redirects
1158 * There is no real handler code (yet). We just watch
1159 * for ICMP host redirect messages. In case anybody
1160 * sees these messages: please contact me
1161 * (wd@denx.de), or - even better - send me the
1162 * necessary fixes :-)
1164 * Note: in all cases where I have seen this so far
1165 * it was a problem with the router configuration,
1166 * for instance when a router was configured in the
1167 * BOOTP reply, but the TFTP server was on the same
1168 * subnet. So this is probably a warning that your
1169 * configuration might be wrong. But I'm not really
1170 * sure if there aren't any other situations.
1172 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1173 * we send a tftp packet to a dead connection, or when
1174 * there is no server at the other end.
1176 if (ip->ip_p == IPPROTO_ICMP) {
1177 receive_icmp(ip, len, src_ip, et);
1179 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1183 #ifdef CONFIG_UDP_CHECKSUM
1184 if (ip->udp_xsum != 0) {
1190 xsum += (ntohs(ip->udp_len));
1191 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1192 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1193 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1194 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1196 sumlen = ntohs(ip->udp_len);
1197 sumptr = (ushort *) &(ip->udp_src);
1199 while (sumlen > 1) {
1202 sumdata = *sumptr++;
1203 xsum += ntohs(sumdata);
1209 sumdata = *(unsigned char *) sumptr;
1210 sumdata = (sumdata << 8) & 0xff00;
1213 while ((xsum >> 16) != 0) {
1214 xsum = (xsum & 0x0000ffff) +
1215 ((xsum >> 16) & 0x0000ffff);
1217 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1218 printf(" UDP wrong checksum %08lx %08x\n",
1219 xsum, ntohs(ip->udp_xsum));
1226 #ifdef CONFIG_NETCONSOLE
1227 nc_input_packet((uchar *)ip + IP_HDR_SIZE,
1230 ntohs(ip->udp_len) - 8);
1233 * IP header OK. Pass the packet to the current handler.
1235 (*packetHandler)((uchar *)ip + IP_HDR_SIZE,
1239 ntohs(ip->udp_len) - 8);
1245 /**********************************************************************/
1247 static int net_check_prereq(enum proto_t protocol)
1251 #if defined(CONFIG_CMD_PING)
1253 if (NetPingIP == 0) {
1254 puts("*** ERROR: ping address not given\n");
1259 #if defined(CONFIG_CMD_SNTP)
1261 if (NetNtpServerIP == 0) {
1262 puts("*** ERROR: NTP server address not given\n");
1267 #if defined(CONFIG_CMD_DNS)
1269 if (NetOurDNSIP == 0) {
1270 puts("*** ERROR: DNS server address not given\n");
1275 #if defined(CONFIG_CMD_NFS)
1280 if (NetServerIP == 0) {
1281 puts("*** ERROR: `serverip' not set\n");
1284 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1285 defined(CONFIG_CMD_DNS)
1292 if (NetOurIP == 0) {
1293 puts("*** ERROR: `ipaddr' not set\n");
1298 #ifdef CONFIG_CMD_RARP
1304 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1305 int num = eth_get_dev_index();
1309 puts("*** ERROR: No ethernet found.\n");
1312 puts("*** ERROR: `ethaddr' not set\n");
1315 printf("*** ERROR: `eth%daddr' not set\n",
1329 /**********************************************************************/
1332 NetCksumOk(uchar *ptr, int len)
1334 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1339 NetCksum(uchar *ptr, int len)
1342 ushort *p = (ushort *)ptr;
1347 xsum = (xsum & 0xffff) + (xsum >> 16);
1348 xsum = (xsum & 0xffff) + (xsum >> 16);
1349 return xsum & 0xffff;
1357 myvlanid = ntohs(NetOurVLAN);
1358 if (myvlanid == (ushort)-1)
1359 myvlanid = VLAN_NONE;
1361 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1362 VLAN_ETHER_HDR_SIZE;
1366 NetSetEther(uchar *xet, uchar * addr, uint prot)
1368 Ethernet_t *et = (Ethernet_t *)xet;
1371 myvlanid = ntohs(NetOurVLAN);
1372 if (myvlanid == (ushort)-1)
1373 myvlanid = VLAN_NONE;
1375 memcpy(et->et_dest, addr, 6);
1376 memcpy(et->et_src, NetOurEther, 6);
1377 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1378 et->et_protlen = htons(prot);
1379 return ETHER_HDR_SIZE;
1381 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1383 vet->vet_vlan_type = htons(PROT_VLAN);
1384 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1385 vet->vet_type = htons(prot);
1386 return VLAN_ETHER_HDR_SIZE;
1391 NetSetIP(uchar *xip, IPaddr_t dest, int dport, int sport, int len)
1393 IP_t *ip = (IP_t *)xip;
1396 * If the data is an odd number of bytes, zero the
1397 * byte after the last byte so that the checksum
1401 xip[IP_HDR_SIZE + len] = 0;
1404 * Construct an IP and UDP header.
1405 * (need to set no fragment bit - XXX)
1407 /* IP_HDR_SIZE / 4 (not including UDP) */
1410 ip->ip_len = htons(IP_HDR_SIZE + len);
1411 ip->ip_id = htons(NetIPID++);
1412 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1414 ip->ip_p = 17; /* UDP */
1416 /* already in network byte order */
1417 NetCopyIP((void *)&ip->ip_src, &NetOurIP);
1419 NetCopyIP((void *)&ip->ip_dst, &dest);
1420 ip->udp_src = htons(sport);
1421 ip->udp_dst = htons(dport);
1422 ip->udp_len = htons(8 + len);
1424 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1427 void copy_filename(char *dst, const char *src, int size)
1429 if (*src && (*src == '"')) {
1434 while ((--size > 0) && *src && (*src != '"'))
1439 #if defined(CONFIG_CMD_NFS) || \
1440 defined(CONFIG_CMD_SNTP) || \
1441 defined(CONFIG_CMD_DNS)
1443 * make port a little random (1024-17407)
1444 * This keeps the math somewhat trivial to compute, and seems to work with
1445 * all supported protocols/clients/servers
1447 unsigned int random_port(void)
1449 return 1024 + (get_timer(0) % 0x4000);
1453 void ip_to_string(IPaddr_t x, char *s)
1456 sprintf(s, "%d.%d.%d.%d",
1457 (int) ((x >> 24) & 0xff),
1458 (int) ((x >> 16) & 0xff),
1459 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1463 void VLAN_to_string(ushort x, char *s)
1467 if (x == (ushort)-1)
1473 sprintf(s, "%d", x & VLAN_IDMASK);
1476 ushort string_to_VLAN(const char *s)
1481 return htons(VLAN_NONE);
1483 if (*s < '0' || *s > '9')
1486 id = (ushort)simple_strtoul(s, NULL, 10);
1491 ushort getenv_VLAN(char *var)
1493 return string_to_VLAN(getenv(var));