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
34 * Prerequisites: - own ethernet address
35 * We want: - own IP address
36 * - TFTP server IP address
41 * Prerequisites: - own ethernet address
43 * - TFTP server IP address
44 * We want: - TFTP server ethernet address
49 * Prerequisites: - own ethernet address
50 * We want: - IP, Netmask, ServerIP, Gateway IP
51 * - bootfilename, lease time
56 * Prerequisites: - own ethernet address
58 * - TFTP server IP address
59 * - TFTP server ethernet address
60 * - name of bootfile (if unknown, we use a default name
61 * derived from our own IP address)
62 * We want: - load the boot file
67 * Prerequisites: - own ethernet address
69 * - name of bootfile (if unknown, we use a default name
70 * derived from our own IP address)
71 * We want: - load the boot file
76 * Prerequisites: - own ethernet address
78 * We want: - network time
86 #if defined(CONFIG_STATUS_LED)
88 #include <status_led.h>
91 #include <linux/compiler.h>
95 #if defined(CONFIG_CMD_DNS)
98 #include "link_local.h"
102 #if defined(CONFIG_CMD_SNTP)
107 DECLARE_GLOBAL_DATA_PTR;
109 /** BOOTP EXTENTIONS **/
111 /* Our subnet mask (0=unknown) */
112 IPaddr_t NetOurSubnetMask;
113 /* Our gateways IP address */
114 IPaddr_t NetOurGatewayIP;
115 /* Our DNS IP address */
116 IPaddr_t NetOurDNSIP;
117 #if defined(CONFIG_BOOTP_DNS2)
118 /* Our 2nd DNS IP address */
119 IPaddr_t NetOurDNS2IP;
122 char NetOurNISDomain[32] = {0,};
124 char NetOurHostName[32] = {0,};
126 char NetOurRootPath[64] = {0,};
127 /* Our bootfile size in blocks */
128 ushort NetBootFileSize;
130 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
134 /** END OF BOOTP EXTENTIONS **/
136 /* The actual transferred size of the bootfile (in bytes) */
137 ulong NetBootFileXferSize;
138 /* Our ethernet address */
139 uchar NetOurEther[6];
140 /* Boot server enet address */
141 uchar NetServerEther[6];
142 /* Our IP addr (0 = unknown) */
144 /* Server IP addr (0 = unknown) */
145 IPaddr_t NetServerIP;
146 /* Current receive packet */
148 /* Current rx packet length */
152 /* Ethernet bcast address */
153 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
154 uchar NetEtherNullAddr[6];
156 void (*push_packet)(void *, int len) = 0;
158 /* Network loop state */
159 enum net_loop_state net_state;
160 /* Tried all network devices */
162 /* Network loop restarted */
163 static int NetRestarted;
164 /* At least one device configured */
165 static int NetDevExists;
167 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
168 /* default is without VLAN */
169 ushort NetOurVLAN = 0xFFFF;
171 ushort NetOurNativeVLAN = 0xFFFF;
176 #if defined(CONFIG_CMD_SNTP)
177 /* NTP server IP address */
178 IPaddr_t NetNtpServerIP;
179 /* offset time from UTC */
183 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
186 uchar *NetRxPackets[PKTBUFSRX];
188 /* Current UDP RX packet handler */
189 static rxhand_f *udp_packet_handler;
190 /* Current ARP RX packet handler */
191 static rxhand_f *arp_packet_handler;
192 #ifdef CONFIG_CMD_TFTPPUT
193 /* Current ICMP rx handler */
194 static rxhand_icmp_f *packet_icmp_handler;
196 /* Current timeout handler */
197 static thand_f *timeHandler;
198 /* Time base value */
199 static ulong timeStart;
200 /* Current timeout value */
201 static ulong timeDelta;
202 /* THE transmit packet */
205 static int net_check_prereq(enum proto_t protocol);
207 static int NetTryCount;
209 /**********************************************************************/
212 * Check if autoload is enabled. If so, use either NFS or TFTP to download
215 void net_auto_load(void)
217 #if defined(CONFIG_CMD_NFS)
218 const char *s = getenv("autoload");
220 if (s != NULL && strcmp(s, "NFS") == 0) {
222 * Use NFS to load the bootfile.
228 if (getenv_yesno("autoload") == 0) {
230 * Just use BOOTP/RARP to configure system;
231 * Do not use TFTP to load the bootfile.
233 net_set_state(NETLOOP_SUCCESS);
239 static void NetInitLoop(void)
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;
257 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
262 static void net_clear_handlers(void)
264 net_set_udp_handler(NULL);
265 net_set_arp_handler(NULL);
266 NetSetTimeout(0, NULL);
269 static void net_cleanup_loop(void)
271 net_clear_handlers();
276 static int first_call = 1;
280 * 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 net_clear_handlers();
292 /* Only need to setup buffer pointers once. */
299 /**********************************************************************/
301 * Main network processing loop.
304 int NetLoop(enum proto_t protocol)
312 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
314 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
316 if (eth_is_on_demand_init() || protocol != NETCONS) {
319 if (eth_init(bd) < 0) {
324 eth_init_state_only(bd);
327 net_set_state(NETLOOP_CONTINUE);
330 * Start the ball rolling with the given start function. From
331 * here on, this code is a state machine driven by received
332 * packets and timer events.
334 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
337 switch (net_check_prereq(protocol)) {
339 /* network not configured */
344 /* network device not configured */
349 NetBootFileXferSize = 0;
352 #ifdef CONFIG_CMD_TFTPPUT
355 /* always use ARP to get server ethernet address */
358 #ifdef CONFIG_CMD_TFTPSRV
363 #if defined(CONFIG_CMD_DHCP)
367 DhcpRequest(); /* Basically same as BOOTP */
377 #if defined(CONFIG_CMD_RARP)
384 #if defined(CONFIG_CMD_PING)
389 #if defined(CONFIG_CMD_NFS)
394 #if defined(CONFIG_CMD_CDP)
399 #ifdef CONFIG_NETCONSOLE
404 #if defined(CONFIG_CMD_SNTP)
409 #if defined(CONFIG_CMD_DNS)
414 #if defined(CONFIG_CMD_LINK_LOCAL)
426 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
427 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
428 defined(CONFIG_STATUS_LED) && \
429 defined(STATUS_LED_RED)
431 * Echo the inverted link state to the fault LED.
433 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
434 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
436 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
437 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
438 #endif /* CONFIG_MII, ... */
441 * Main packet reception loop. Loop receiving packets until
442 * someone sets `net_state' to a state that terminates.
446 #ifdef CONFIG_SHOW_ACTIVITY
450 * Check the ethernet for a new packet. The ethernet
451 * receive routine will process it.
456 * Abort if ctrl-c was pressed.
459 /* cancel any ARP that may not have completed */
460 NetArpWaitPacketIP = 0;
464 /* Invalidate the last protocol */
465 eth_set_last_protocol(BOOTP);
468 /* include a debug print as well incase the debug
469 messages are directed to stderr */
470 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
477 * Check for a timeout, and run the timeout handler
480 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
483 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
484 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
485 defined(CONFIG_STATUS_LED) && \
486 defined(STATUS_LED_RED)
488 * Echo the inverted link state to the fault LED.
490 if (miiphy_link(eth_get_dev()->name,
491 CONFIG_SYS_FAULT_MII_ADDR)) {
492 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
494 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
496 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
497 #endif /* CONFIG_MII, ... */
498 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
500 timeHandler = (thand_f *)0;
507 case NETLOOP_RESTART:
511 case NETLOOP_SUCCESS:
513 if (NetBootFileXferSize > 0) {
515 printf("Bytes transferred = %ld (%lx hex)\n",
517 NetBootFileXferSize);
518 sprintf(buf, "%lX", NetBootFileXferSize);
519 setenv("filesize", buf);
521 sprintf(buf, "%lX", (unsigned long)load_addr);
522 setenv("fileaddr", buf);
524 if (protocol != NETCONS)
527 eth_halt_state_only();
529 eth_set_last_protocol(protocol);
531 ret = NetBootFileXferSize;
532 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
537 /* Invalidate the last protocol */
538 eth_set_last_protocol(BOOTP);
539 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
542 case NETLOOP_CONTINUE:
548 #ifdef CONFIG_CMD_TFTPPUT
549 /* Clear out the handlers */
550 net_set_udp_handler(NULL);
551 net_set_icmp_handler(NULL);
556 /**********************************************************************/
559 startAgainTimeout(void)
561 net_set_state(NETLOOP_RESTART);
564 void NetStartAgain(void)
567 int retry_forever = 0;
568 unsigned long retrycnt = 0;
570 nretry = getenv("netretry");
572 if (!strcmp(nretry, "yes"))
574 else if (!strcmp(nretry, "no"))
576 else if (!strcmp(nretry, "once"))
579 retrycnt = simple_strtoul(nretry, NULL, 0);
583 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
585 net_set_state(NETLOOP_FAIL);
592 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
593 eth_try_another(!NetRestarted);
596 if (NetRestartWrap) {
599 NetSetTimeout(10000UL, startAgainTimeout);
600 net_set_udp_handler(NULL);
602 net_set_state(NETLOOP_FAIL);
605 net_set_state(NETLOOP_RESTART);
609 /**********************************************************************/
614 static void dummy_handler(uchar *pkt, unsigned dport,
615 IPaddr_t sip, unsigned sport,
620 rxhand_f *net_get_udp_handler(void)
622 return udp_packet_handler;
625 void net_set_udp_handler(rxhand_f *f)
627 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
629 udp_packet_handler = dummy_handler;
631 udp_packet_handler = f;
634 rxhand_f *net_get_arp_handler(void)
636 return arp_packet_handler;
639 void net_set_arp_handler(rxhand_f *f)
641 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
643 arp_packet_handler = dummy_handler;
645 arp_packet_handler = f;
648 #ifdef CONFIG_CMD_TFTPPUT
649 void net_set_icmp_handler(rxhand_icmp_f *f)
651 packet_icmp_handler = f;
656 NetSetTimeout(ulong iv, thand_f *f)
659 debug_cond(DEBUG_INT_STATE,
660 "--- NetLoop timeout handler cancelled\n");
661 timeHandler = (thand_f *)0;
663 debug_cond(DEBUG_INT_STATE,
664 "--- NetLoop timeout handler set (%p)\n", f);
666 timeStart = get_timer(0);
667 timeDelta = iv * CONFIG_SYS_HZ / 1000;
671 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
678 /* make sure the NetTxPacket is initialized (NetInit() was called) */
679 assert(NetTxPacket != NULL);
680 if (NetTxPacket == NULL)
683 /* convert to new style broadcast */
687 /* if broadcast, make the ether address a broadcast and don't do ARP */
688 if (dest == 0xFFFFFFFF)
689 ether = NetBcastAddr;
691 pkt = (uchar *)NetTxPacket;
693 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
695 net_set_udp_header(pkt, dest, dport, sport, payload_len);
696 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
698 /* if MAC address was not discovered yet, do an ARP request */
699 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
700 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
702 /* save the ip and eth addr for the packet to send after arp */
703 NetArpWaitPacketIP = dest;
704 NetArpWaitPacketMAC = ether;
706 /* size of the waiting packet */
707 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
709 /* and do the ARP request */
711 NetArpWaitTimerStart = get_timer(0);
713 return 1; /* waiting */
715 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
717 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
718 return 0; /* transmitted */
722 #ifdef CONFIG_IP_DEFRAG
724 * This function collects fragments in a single packet, according
725 * to the algorithm in RFC815. It returns NULL or the pointer to
726 * a complete packet, in static storage
728 #ifndef CONFIG_NET_MAXDEFRAG
729 #define CONFIG_NET_MAXDEFRAG 16384
732 * MAXDEFRAG, above, is chosen in the config file and is real data
733 * so we need to add the NFS overhead, which is more than TFTP.
734 * To use sizeof in the internal unnamed structures, we need a real
735 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
736 * The compiler doesn't complain nor allocates the actual structure
738 static struct rpc_t rpc_specimen;
739 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
741 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
744 * this is the packet being assembled, either data or frag control.
745 * Fragments go by 8 bytes, so this union must be 8 bytes long
748 /* first_byte is address of this structure */
749 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
750 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
751 u16 prev_hole; /* index of prev, 0 == none */
755 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
757 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
758 static u16 first_hole, total_len;
759 struct hole *payload, *thisfrag, *h, *newh;
760 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
761 uchar *indata = (uchar *)ip;
762 int offset8, start, len, done = 0;
763 u16 ip_off = ntohs(ip->ip_off);
765 /* payload starts after IP header, this fragment is in there */
766 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
767 offset8 = (ip_off & IP_OFFS);
768 thisfrag = payload + offset8;
770 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
772 if (start + len > IP_MAXUDP) /* fragment extends too far */
775 if (!total_len || localip->ip_id != ip->ip_id) {
776 /* new (or different) packet, reset structs */
778 payload[0].last_byte = ~0;
779 payload[0].next_hole = 0;
780 payload[0].prev_hole = 0;
782 /* any IP header will work, copy the first we received */
783 memcpy(localip, ip, IP_HDR_SIZE);
787 * What follows is the reassembly algorithm. We use the payload
788 * array as a linked list of hole descriptors, as each hole starts
789 * at a multiple of 8 bytes. However, last byte can be whatever value,
790 * so it is represented as byte count, not as 8-byte blocks.
793 h = payload + first_hole;
794 while (h->last_byte < start) {
796 /* no hole that far away */
799 h = payload + h->next_hole;
802 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
803 if (offset8 + ((len + 7) / 8) <= h - payload) {
804 /* no overlap with holes (dup fragment?) */
808 if (!(ip_off & IP_FLAGS_MFRAG)) {
809 /* no more fragmentss: truncate this (last) hole */
810 total_len = start + len;
811 h->last_byte = start + len;
815 * There is some overlap: fix the hole list. This code doesn't
816 * deal with a fragment that overlaps with two different holes
817 * (thus being a superset of a previously-received fragment).
820 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
821 /* complete overlap with hole: remove hole */
822 if (!h->prev_hole && !h->next_hole) {
823 /* last remaining hole */
825 } else if (!h->prev_hole) {
827 first_hole = h->next_hole;
828 payload[h->next_hole].prev_hole = 0;
829 } else if (!h->next_hole) {
831 payload[h->prev_hole].next_hole = 0;
833 /* in the middle of the list */
834 payload[h->next_hole].prev_hole = h->prev_hole;
835 payload[h->prev_hole].next_hole = h->next_hole;
838 } else if (h->last_byte <= start + len) {
839 /* overlaps with final part of the hole: shorten this hole */
840 h->last_byte = start;
842 } else if (h >= thisfrag) {
843 /* overlaps with initial part of the hole: move this hole */
844 newh = thisfrag + (len / 8);
848 payload[h->next_hole].prev_hole = (h - payload);
850 payload[h->prev_hole].next_hole = (h - payload);
852 first_hole = (h - payload);
855 /* fragment sits in the middle: split the hole */
856 newh = thisfrag + (len / 8);
858 h->last_byte = start;
859 h->next_hole = (newh - payload);
860 newh->prev_hole = (h - payload);
862 payload[newh->next_hole].prev_hole = (newh - payload);
865 /* finally copy this fragment and possibly return whole packet */
866 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
870 localip->ip_len = htons(total_len);
871 *lenp = total_len + IP_HDR_SIZE;
875 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
877 u16 ip_off = ntohs(ip->ip_off);
878 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
879 return ip; /* not a fragment */
880 return __NetDefragment(ip, lenp);
883 #else /* !CONFIG_IP_DEFRAG */
885 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
887 u16 ip_off = ntohs(ip->ip_off);
888 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
889 return ip; /* not a fragment */
895 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
898 * @parma ip IP packet containing the ICMP
900 static void receive_icmp(struct ip_udp_hdr *ip, int len,
901 IPaddr_t src_ip, struct ethernet_hdr *et)
903 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
905 switch (icmph->type) {
907 if (icmph->code != ICMP_REDIR_HOST)
909 printf(" ICMP Host Redirect to %pI4 ",
913 #if defined(CONFIG_CMD_PING)
914 ping_receive(et, ip, len);
916 #ifdef CONFIG_CMD_TFTPPUT
917 if (packet_icmp_handler)
918 packet_icmp_handler(icmph->type, icmph->code,
919 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
920 icmph->un.data, ntohs(ip->udp_len));
927 NetReceive(uchar *inpkt, int len)
929 struct ethernet_hdr *et;
930 struct ip_udp_hdr *ip;
934 #if defined(CONFIG_CMD_CDP)
937 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
939 debug_cond(DEBUG_NET_PKT, "packet received\n");
942 NetRxPacketLen = len;
943 et = (struct ethernet_hdr *)inpkt;
945 /* too small packet? */
946 if (len < ETHER_HDR_SIZE)
951 (*push_packet)(inpkt, len);
956 #if defined(CONFIG_CMD_CDP)
957 /* keep track if packet is CDP */
958 iscdp = is_cdp_packet(et->et_dest);
961 myvlanid = ntohs(NetOurVLAN);
962 if (myvlanid == (ushort)-1)
963 myvlanid = VLAN_NONE;
964 mynvlanid = ntohs(NetOurNativeVLAN);
965 if (mynvlanid == (ushort)-1)
966 mynvlanid = VLAN_NONE;
968 eth_proto = ntohs(et->et_protlen);
970 if (eth_proto < 1514) {
971 struct e802_hdr *et802 = (struct e802_hdr *)et;
973 * Got a 802.2 packet. Check the other protocol field.
974 * XXX VLAN over 802.2+SNAP not implemented!
976 eth_proto = ntohs(et802->et_prot);
978 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
979 len -= E802_HDR_SIZE;
981 } else if (eth_proto != PROT_VLAN) { /* normal packet */
982 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
983 len -= ETHER_HDR_SIZE;
985 } else { /* VLAN packet */
986 struct vlan_ethernet_hdr *vet =
987 (struct vlan_ethernet_hdr *)et;
989 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
991 /* too small packet? */
992 if (len < VLAN_ETHER_HDR_SIZE)
995 /* if no VLAN active */
996 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
997 #if defined(CONFIG_CMD_CDP)
1003 cti = ntohs(vet->vet_tag);
1004 vlanid = cti & VLAN_IDMASK;
1005 eth_proto = ntohs(vet->vet_type);
1007 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1008 len -= VLAN_ETHER_HDR_SIZE;
1011 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1013 #if defined(CONFIG_CMD_CDP)
1015 cdp_receive((uchar *)ip, len);
1020 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1021 if (vlanid == VLAN_NONE)
1022 vlanid = (mynvlanid & VLAN_IDMASK);
1024 if (vlanid != (myvlanid & VLAN_IDMASK))
1028 switch (eth_proto) {
1031 ArpReceive(et, ip, len);
1034 #ifdef CONFIG_CMD_RARP
1036 rarp_receive(ip, len);
1040 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1041 /* Before we start poking the header, make sure it is there */
1042 if (len < IP_UDP_HDR_SIZE) {
1043 debug("len bad %d < %lu\n", len,
1044 (ulong)IP_UDP_HDR_SIZE);
1047 /* Check the packet length */
1048 if (len < ntohs(ip->ip_len)) {
1049 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1052 len = ntohs(ip->ip_len);
1053 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1054 len, ip->ip_hl_v & 0xff);
1056 /* Can't deal with anything except IPv4 */
1057 if ((ip->ip_hl_v & 0xf0) != 0x40)
1059 /* Can't deal with IP options (headers != 20 bytes) */
1060 if ((ip->ip_hl_v & 0x0f) > 0x05)
1062 /* Check the Checksum of the header */
1063 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1064 debug("checksum bad\n");
1067 /* If it is not for us, ignore it */
1068 dst_ip = NetReadIP(&ip->ip_dst);
1069 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1070 #ifdef CONFIG_MCAST_TFTP
1071 if (Mcast_addr != dst_ip)
1075 /* Read source IP address for later use */
1076 src_ip = NetReadIP(&ip->ip_src);
1078 * The function returns the unchanged packet if it's not
1079 * a fragment, and either the complete packet or NULL if
1080 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1082 ip = NetDefragment(ip, &len);
1086 * watch for ICMP host redirects
1088 * There is no real handler code (yet). We just watch
1089 * for ICMP host redirect messages. In case anybody
1090 * sees these messages: please contact me
1091 * (wd@denx.de), or - even better - send me the
1092 * necessary fixes :-)
1094 * Note: in all cases where I have seen this so far
1095 * it was a problem with the router configuration,
1096 * for instance when a router was configured in the
1097 * BOOTP reply, but the TFTP server was on the same
1098 * subnet. So this is probably a warning that your
1099 * configuration might be wrong. But I'm not really
1100 * sure if there aren't any other situations.
1102 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1103 * we send a tftp packet to a dead connection, or when
1104 * there is no server at the other end.
1106 if (ip->ip_p == IPPROTO_ICMP) {
1107 receive_icmp(ip, len, src_ip, et);
1109 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1113 debug_cond(DEBUG_DEV_PKT,
1114 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1115 &dst_ip, &src_ip, len);
1117 #ifdef CONFIG_UDP_CHECKSUM
1118 if (ip->udp_xsum != 0) {
1124 xsum += (ntohs(ip->udp_len));
1125 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1126 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1127 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1128 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1130 sumlen = ntohs(ip->udp_len);
1131 sumptr = (ushort *) &(ip->udp_src);
1133 while (sumlen > 1) {
1136 sumdata = *sumptr++;
1137 xsum += ntohs(sumdata);
1143 sumdata = *(unsigned char *) sumptr;
1144 sumdata = (sumdata << 8) & 0xff00;
1147 while ((xsum >> 16) != 0) {
1148 xsum = (xsum & 0x0000ffff) +
1149 ((xsum >> 16) & 0x0000ffff);
1151 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1152 printf(" UDP wrong checksum %08lx %08x\n",
1153 xsum, ntohs(ip->udp_xsum));
1160 #ifdef CONFIG_NETCONSOLE
1161 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1165 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1168 * IP header OK. Pass the packet to the current handler.
1170 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1174 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1180 /**********************************************************************/
1182 static int net_check_prereq(enum proto_t protocol)
1186 #if defined(CONFIG_CMD_PING)
1188 if (NetPingIP == 0) {
1189 puts("*** ERROR: ping address not given\n");
1194 #if defined(CONFIG_CMD_SNTP)
1196 if (NetNtpServerIP == 0) {
1197 puts("*** ERROR: NTP server address not given\n");
1202 #if defined(CONFIG_CMD_DNS)
1204 if (NetOurDNSIP == 0) {
1205 puts("*** ERROR: DNS server address not given\n");
1210 #if defined(CONFIG_CMD_NFS)
1215 if (NetServerIP == 0) {
1216 puts("*** ERROR: `serverip' not set\n");
1219 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1220 defined(CONFIG_CMD_DNS)
1227 if (NetOurIP == 0) {
1228 puts("*** ERROR: `ipaddr' not set\n");
1233 #ifdef CONFIG_CMD_RARP
1240 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1241 int num = eth_get_dev_index();
1245 puts("*** ERROR: No ethernet found.\n");
1248 puts("*** ERROR: `ethaddr' not set\n");
1251 printf("*** ERROR: `eth%daddr' not set\n",
1265 /**********************************************************************/
1268 NetCksumOk(uchar *ptr, int len)
1270 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1275 NetCksum(uchar *ptr, int len)
1278 ushort *p = (ushort *)ptr;
1283 xsum = (xsum & 0xffff) + (xsum >> 16);
1284 xsum = (xsum & 0xffff) + (xsum >> 16);
1285 return xsum & 0xffff;
1293 myvlanid = ntohs(NetOurVLAN);
1294 if (myvlanid == (ushort)-1)
1295 myvlanid = VLAN_NONE;
1297 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1298 VLAN_ETHER_HDR_SIZE;
1302 NetSetEther(uchar *xet, uchar * addr, uint prot)
1304 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1307 myvlanid = ntohs(NetOurVLAN);
1308 if (myvlanid == (ushort)-1)
1309 myvlanid = VLAN_NONE;
1311 memcpy(et->et_dest, addr, 6);
1312 memcpy(et->et_src, NetOurEther, 6);
1313 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1314 et->et_protlen = htons(prot);
1315 return ETHER_HDR_SIZE;
1317 struct vlan_ethernet_hdr *vet =
1318 (struct vlan_ethernet_hdr *)xet;
1320 vet->vet_vlan_type = htons(PROT_VLAN);
1321 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1322 vet->vet_type = htons(prot);
1323 return VLAN_ETHER_HDR_SIZE;
1327 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1331 memcpy(et->et_dest, addr, 6);
1332 memcpy(et->et_src, NetOurEther, 6);
1333 protlen = ntohs(et->et_protlen);
1334 if (protlen == PROT_VLAN) {
1335 struct vlan_ethernet_hdr *vet =
1336 (struct vlan_ethernet_hdr *)et;
1337 vet->vet_type = htons(prot);
1338 return VLAN_ETHER_HDR_SIZE;
1339 } else if (protlen > 1514) {
1340 et->et_protlen = htons(prot);
1341 return ETHER_HDR_SIZE;
1344 struct e802_hdr *et802 = (struct e802_hdr *)et;
1345 et802->et_prot = htons(prot);
1346 return E802_HDR_SIZE;
1350 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1352 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1355 * Construct an IP header.
1357 /* IP_HDR_SIZE / 4 (not including UDP) */
1360 ip->ip_len = htons(IP_HDR_SIZE);
1361 ip->ip_id = htons(NetIPID++);
1362 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1365 /* already in network byte order */
1366 NetCopyIP((void *)&ip->ip_src, &source);
1367 /* already in network byte order */
1368 NetCopyIP((void *)&ip->ip_dst, &dest);
1371 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1374 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1377 * If the data is an odd number of bytes, zero the
1378 * byte after the last byte so that the checksum
1382 pkt[IP_UDP_HDR_SIZE + len] = 0;
1384 net_set_ip_header(pkt, dest, NetOurIP);
1385 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1386 ip->ip_p = IPPROTO_UDP;
1387 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1389 ip->udp_src = htons(sport);
1390 ip->udp_dst = htons(dport);
1391 ip->udp_len = htons(UDP_HDR_SIZE + len);
1395 void copy_filename(char *dst, const char *src, int size)
1397 if (*src && (*src == '"')) {
1402 while ((--size > 0) && *src && (*src != '"'))
1407 #if defined(CONFIG_CMD_NFS) || \
1408 defined(CONFIG_CMD_SNTP) || \
1409 defined(CONFIG_CMD_DNS)
1411 * make port a little random (1024-17407)
1412 * This keeps the math somewhat trivial to compute, and seems to work with
1413 * all supported protocols/clients/servers
1415 unsigned int random_port(void)
1417 return 1024 + (get_timer(0) % 0x4000);
1421 void ip_to_string(IPaddr_t x, char *s)
1424 sprintf(s, "%d.%d.%d.%d",
1425 (int) ((x >> 24) & 0xff),
1426 (int) ((x >> 16) & 0xff),
1427 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1431 void VLAN_to_string(ushort x, char *s)
1435 if (x == (ushort)-1)
1441 sprintf(s, "%d", x & VLAN_IDMASK);
1444 ushort string_to_VLAN(const char *s)
1449 return htons(VLAN_NONE);
1451 if (*s < '0' || *s > '9')
1454 id = (ushort)simple_strtoul(s, NULL, 10);
1459 ushort getenv_VLAN(char *var)
1461 return string_to_VLAN(getenv(var));