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
85 #include <environment.h>
87 #if defined(CONFIG_STATUS_LED)
89 #include <status_led.h>
92 #include <linux/compiler.h>
96 #if defined(CONFIG_CMD_DNS)
99 #include "link_local.h"
103 #if defined(CONFIG_CMD_SNTP)
108 DECLARE_GLOBAL_DATA_PTR;
110 /** BOOTP EXTENTIONS **/
112 /* Our subnet mask (0=unknown) */
113 IPaddr_t NetOurSubnetMask;
114 /* Our gateways IP address */
115 IPaddr_t NetOurGatewayIP;
116 /* Our DNS IP address */
117 IPaddr_t NetOurDNSIP;
118 #if defined(CONFIG_BOOTP_DNS2)
119 /* Our 2nd DNS IP address */
120 IPaddr_t NetOurDNS2IP;
123 char NetOurNISDomain[32] = {0,};
125 char NetOurHostName[32] = {0,};
127 char NetOurRootPath[64] = {0,};
128 /* Our bootfile size in blocks */
129 ushort NetBootFileSize;
131 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
135 /** END OF BOOTP EXTENTIONS **/
137 /* The actual transferred size of the bootfile (in bytes) */
138 ulong NetBootFileXferSize;
139 /* Our ethernet address */
140 uchar NetOurEther[6];
141 /* Boot server enet address */
142 uchar NetServerEther[6];
143 /* Our IP addr (0 = unknown) */
145 /* Server IP addr (0 = unknown) */
146 IPaddr_t NetServerIP;
147 /* Current receive packet */
149 /* Current rx packet length */
153 /* Ethernet bcast address */
154 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
155 uchar NetEtherNullAddr[6];
157 void (*push_packet)(void *, int len) = 0;
159 /* Network loop state */
160 enum net_loop_state net_state;
161 /* Tried all network devices */
163 /* Network loop restarted */
164 static int NetRestarted;
165 /* At least one device configured */
166 static int NetDevExists;
168 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
169 /* default is without VLAN */
170 ushort NetOurVLAN = 0xFFFF;
172 ushort NetOurNativeVLAN = 0xFFFF;
177 #if defined(CONFIG_CMD_SNTP)
178 /* NTP server IP address */
179 IPaddr_t NetNtpServerIP;
180 /* offset time from UTC */
184 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
187 uchar *NetRxPackets[PKTBUFSRX];
189 /* Current UDP RX packet handler */
190 static rxhand_f *udp_packet_handler;
191 /* Current ARP RX packet handler */
192 static rxhand_f *arp_packet_handler;
193 #ifdef CONFIG_CMD_TFTPPUT
194 /* Current ICMP rx handler */
195 static rxhand_icmp_f *packet_icmp_handler;
197 /* Current timeout handler */
198 static thand_f *timeHandler;
199 /* Time base value */
200 static ulong timeStart;
201 /* Current timeout value */
202 static ulong timeDelta;
203 /* THE transmit packet */
206 static int net_check_prereq(enum proto_t protocol);
208 static int NetTryCount;
210 int __maybe_unused net_busy_flag;
212 /**********************************************************************/
214 static int on_bootfile(const char *name, const char *value, enum env_op op,
219 case env_op_overwrite:
220 copy_filename(BootFile, value, sizeof(BootFile));
228 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
231 * Check if autoload is enabled. If so, use either NFS or TFTP to download
234 void net_auto_load(void)
236 #if defined(CONFIG_CMD_NFS)
237 const char *s = getenv("autoload");
239 if (s != NULL && strcmp(s, "NFS") == 0) {
241 * Use NFS to load the bootfile.
247 if (getenv_yesno("autoload") == 0) {
249 * Just use BOOTP/RARP to configure system;
250 * Do not use TFTP to load the bootfile.
252 net_set_state(NETLOOP_SUCCESS);
258 static void NetInitLoop(void)
260 static int env_changed_id;
261 int env_id = get_env_id();
263 /* update only when the environment has changed */
264 if (env_changed_id != env_id) {
265 NetOurIP = getenv_IPaddr("ipaddr");
266 NetOurGatewayIP = getenv_IPaddr("gatewayip");
267 NetOurSubnetMask = getenv_IPaddr("netmask");
268 NetServerIP = getenv_IPaddr("serverip");
269 NetOurNativeVLAN = getenv_VLAN("nvlan");
270 NetOurVLAN = getenv_VLAN("vlan");
271 #if defined(CONFIG_CMD_DNS)
272 NetOurDNSIP = getenv_IPaddr("dnsip");
274 env_changed_id = env_id;
277 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
282 static void net_clear_handlers(void)
284 net_set_udp_handler(NULL);
285 net_set_arp_handler(NULL);
286 NetSetTimeout(0, NULL);
289 static void net_cleanup_loop(void)
291 net_clear_handlers();
296 static int first_call = 1;
300 * Setup packet buffers, aligned correctly.
304 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
305 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
306 for (i = 0; i < PKTBUFSRX; i++)
307 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
310 net_clear_handlers();
312 /* Only need to setup buffer pointers once. */
319 /**********************************************************************/
321 * Main network processing loop.
324 int NetLoop(enum proto_t protocol)
332 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
334 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
336 if (eth_is_on_demand_init() || protocol != NETCONS) {
339 if (eth_init(bd) < 0) {
344 eth_init_state_only(bd);
347 #ifdef CONFIG_USB_KEYBOARD
350 net_set_state(NETLOOP_CONTINUE);
353 * Start the ball rolling with the given start function. From
354 * here on, this code is a state machine driven by received
355 * packets and timer events.
357 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
360 switch (net_check_prereq(protocol)) {
362 /* network not configured */
367 /* network device not configured */
372 NetBootFileXferSize = 0;
375 #ifdef CONFIG_CMD_TFTPPUT
378 /* always use ARP to get server ethernet address */
381 #ifdef CONFIG_CMD_TFTPSRV
386 #if defined(CONFIG_CMD_DHCP)
390 DhcpRequest(); /* Basically same as BOOTP */
400 #if defined(CONFIG_CMD_RARP)
407 #if defined(CONFIG_CMD_PING)
412 #if defined(CONFIG_CMD_NFS)
417 #if defined(CONFIG_CMD_CDP)
422 #ifdef CONFIG_NETCONSOLE
427 #if defined(CONFIG_CMD_SNTP)
432 #if defined(CONFIG_CMD_DNS)
437 #if defined(CONFIG_CMD_LINK_LOCAL)
449 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
450 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
451 defined(CONFIG_STATUS_LED) && \
452 defined(STATUS_LED_RED)
454 * Echo the inverted link state to the fault LED.
456 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
457 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
459 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
460 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
461 #endif /* CONFIG_MII, ... */
462 #ifdef CONFIG_USB_KEYBOARD
467 * Main packet reception loop. Loop receiving packets until
468 * someone sets `net_state' to a state that terminates.
472 #ifdef CONFIG_SHOW_ACTIVITY
476 * Check the ethernet for a new packet. The ethernet
477 * receive routine will process it.
482 * Abort if ctrl-c was pressed.
485 /* cancel any ARP that may not have completed */
486 NetArpWaitPacketIP = 0;
490 /* Invalidate the last protocol */
491 eth_set_last_protocol(BOOTP);
494 /* include a debug print as well incase the debug
495 messages are directed to stderr */
496 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
503 * Check for a timeout, and run the timeout handler
506 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
509 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
510 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
511 defined(CONFIG_STATUS_LED) && \
512 defined(STATUS_LED_RED)
514 * Echo the inverted link state to the fault LED.
516 if (miiphy_link(eth_get_dev()->name,
517 CONFIG_SYS_FAULT_MII_ADDR)) {
518 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
520 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
522 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
523 #endif /* CONFIG_MII, ... */
524 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
526 timeHandler = (thand_f *)0;
533 case NETLOOP_RESTART:
537 case NETLOOP_SUCCESS:
539 if (NetBootFileXferSize > 0) {
540 printf("Bytes transferred = %ld (%lx hex)\n",
542 NetBootFileXferSize);
543 setenv_hex("filesize", NetBootFileXferSize);
544 setenv_hex("fileaddr", load_addr);
546 if (protocol != NETCONS)
549 eth_halt_state_only();
551 eth_set_last_protocol(protocol);
553 ret = NetBootFileXferSize;
554 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
559 /* Invalidate the last protocol */
560 eth_set_last_protocol(BOOTP);
561 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
564 case NETLOOP_CONTINUE:
570 #ifdef CONFIG_USB_KEYBOARD
573 #ifdef CONFIG_CMD_TFTPPUT
574 /* Clear out the handlers */
575 net_set_udp_handler(NULL);
576 net_set_icmp_handler(NULL);
581 /**********************************************************************/
584 startAgainTimeout(void)
586 net_set_state(NETLOOP_RESTART);
589 void NetStartAgain(void)
592 int retry_forever = 0;
593 unsigned long retrycnt = 0;
595 nretry = getenv("netretry");
597 if (!strcmp(nretry, "yes"))
599 else if (!strcmp(nretry, "no"))
601 else if (!strcmp(nretry, "once"))
604 retrycnt = simple_strtoul(nretry, NULL, 0);
608 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
610 net_set_state(NETLOOP_FAIL);
617 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
618 eth_try_another(!NetRestarted);
621 if (NetRestartWrap) {
624 NetSetTimeout(10000UL, startAgainTimeout);
625 net_set_udp_handler(NULL);
627 net_set_state(NETLOOP_FAIL);
630 net_set_state(NETLOOP_RESTART);
634 /**********************************************************************/
639 static void dummy_handler(uchar *pkt, unsigned dport,
640 IPaddr_t sip, unsigned sport,
645 rxhand_f *net_get_udp_handler(void)
647 return udp_packet_handler;
650 void net_set_udp_handler(rxhand_f *f)
652 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
654 udp_packet_handler = dummy_handler;
656 udp_packet_handler = f;
659 rxhand_f *net_get_arp_handler(void)
661 return arp_packet_handler;
664 void net_set_arp_handler(rxhand_f *f)
666 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
668 arp_packet_handler = dummy_handler;
670 arp_packet_handler = f;
673 #ifdef CONFIG_CMD_TFTPPUT
674 void net_set_icmp_handler(rxhand_icmp_f *f)
676 packet_icmp_handler = f;
681 NetSetTimeout(ulong iv, thand_f *f)
684 debug_cond(DEBUG_INT_STATE,
685 "--- NetLoop timeout handler cancelled\n");
686 timeHandler = (thand_f *)0;
688 debug_cond(DEBUG_INT_STATE,
689 "--- NetLoop timeout handler set (%p)\n", f);
691 timeStart = get_timer(0);
692 timeDelta = iv * CONFIG_SYS_HZ / 1000;
696 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
703 /* make sure the NetTxPacket is initialized (NetInit() was called) */
704 assert(NetTxPacket != NULL);
705 if (NetTxPacket == NULL)
708 /* convert to new style broadcast */
712 /* if broadcast, make the ether address a broadcast and don't do ARP */
713 if (dest == 0xFFFFFFFF)
714 ether = NetBcastAddr;
716 pkt = (uchar *)NetTxPacket;
718 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
720 net_set_udp_header(pkt, dest, dport, sport, payload_len);
721 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
723 /* if MAC address was not discovered yet, do an ARP request */
724 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
725 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
727 /* save the ip and eth addr for the packet to send after arp */
728 NetArpWaitPacketIP = dest;
729 NetArpWaitPacketMAC = ether;
731 /* size of the waiting packet */
732 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
734 /* and do the ARP request */
736 NetArpWaitTimerStart = get_timer(0);
738 return 1; /* waiting */
740 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
742 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
743 return 0; /* transmitted */
747 #ifdef CONFIG_IP_DEFRAG
749 * This function collects fragments in a single packet, according
750 * to the algorithm in RFC815. It returns NULL or the pointer to
751 * a complete packet, in static storage
753 #ifndef CONFIG_NET_MAXDEFRAG
754 #define CONFIG_NET_MAXDEFRAG 16384
757 * MAXDEFRAG, above, is chosen in the config file and is real data
758 * so we need to add the NFS overhead, which is more than TFTP.
759 * To use sizeof in the internal unnamed structures, we need a real
760 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
761 * The compiler doesn't complain nor allocates the actual structure
763 static struct rpc_t rpc_specimen;
764 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
766 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
769 * this is the packet being assembled, either data or frag control.
770 * Fragments go by 8 bytes, so this union must be 8 bytes long
773 /* first_byte is address of this structure */
774 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
775 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
776 u16 prev_hole; /* index of prev, 0 == none */
780 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
782 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
783 static u16 first_hole, total_len;
784 struct hole *payload, *thisfrag, *h, *newh;
785 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
786 uchar *indata = (uchar *)ip;
787 int offset8, start, len, done = 0;
788 u16 ip_off = ntohs(ip->ip_off);
790 /* payload starts after IP header, this fragment is in there */
791 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
792 offset8 = (ip_off & IP_OFFS);
793 thisfrag = payload + offset8;
795 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
797 if (start + len > IP_MAXUDP) /* fragment extends too far */
800 if (!total_len || localip->ip_id != ip->ip_id) {
801 /* new (or different) packet, reset structs */
803 payload[0].last_byte = ~0;
804 payload[0].next_hole = 0;
805 payload[0].prev_hole = 0;
807 /* any IP header will work, copy the first we received */
808 memcpy(localip, ip, IP_HDR_SIZE);
812 * What follows is the reassembly algorithm. We use the payload
813 * array as a linked list of hole descriptors, as each hole starts
814 * at a multiple of 8 bytes. However, last byte can be whatever value,
815 * so it is represented as byte count, not as 8-byte blocks.
818 h = payload + first_hole;
819 while (h->last_byte < start) {
821 /* no hole that far away */
824 h = payload + h->next_hole;
827 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
828 if (offset8 + ((len + 7) / 8) <= h - payload) {
829 /* no overlap with holes (dup fragment?) */
833 if (!(ip_off & IP_FLAGS_MFRAG)) {
834 /* no more fragmentss: truncate this (last) hole */
835 total_len = start + len;
836 h->last_byte = start + len;
840 * There is some overlap: fix the hole list. This code doesn't
841 * deal with a fragment that overlaps with two different holes
842 * (thus being a superset of a previously-received fragment).
845 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
846 /* complete overlap with hole: remove hole */
847 if (!h->prev_hole && !h->next_hole) {
848 /* last remaining hole */
850 } else if (!h->prev_hole) {
852 first_hole = h->next_hole;
853 payload[h->next_hole].prev_hole = 0;
854 } else if (!h->next_hole) {
856 payload[h->prev_hole].next_hole = 0;
858 /* in the middle of the list */
859 payload[h->next_hole].prev_hole = h->prev_hole;
860 payload[h->prev_hole].next_hole = h->next_hole;
863 } else if (h->last_byte <= start + len) {
864 /* overlaps with final part of the hole: shorten this hole */
865 h->last_byte = start;
867 } else if (h >= thisfrag) {
868 /* overlaps with initial part of the hole: move this hole */
869 newh = thisfrag + (len / 8);
873 payload[h->next_hole].prev_hole = (h - payload);
875 payload[h->prev_hole].next_hole = (h - payload);
877 first_hole = (h - payload);
880 /* fragment sits in the middle: split the hole */
881 newh = thisfrag + (len / 8);
883 h->last_byte = start;
884 h->next_hole = (newh - payload);
885 newh->prev_hole = (h - payload);
887 payload[newh->next_hole].prev_hole = (newh - payload);
890 /* finally copy this fragment and possibly return whole packet */
891 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
895 localip->ip_len = htons(total_len);
896 *lenp = total_len + IP_HDR_SIZE;
900 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
902 u16 ip_off = ntohs(ip->ip_off);
903 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
904 return ip; /* not a fragment */
905 return __NetDefragment(ip, lenp);
908 #else /* !CONFIG_IP_DEFRAG */
910 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
912 u16 ip_off = ntohs(ip->ip_off);
913 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
914 return ip; /* not a fragment */
920 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
923 * @parma ip IP packet containing the ICMP
925 static void receive_icmp(struct ip_udp_hdr *ip, int len,
926 IPaddr_t src_ip, struct ethernet_hdr *et)
928 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
930 switch (icmph->type) {
932 if (icmph->code != ICMP_REDIR_HOST)
934 printf(" ICMP Host Redirect to %pI4 ",
938 #if defined(CONFIG_CMD_PING)
939 ping_receive(et, ip, len);
941 #ifdef CONFIG_CMD_TFTPPUT
942 if (packet_icmp_handler)
943 packet_icmp_handler(icmph->type, icmph->code,
944 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
945 icmph->un.data, ntohs(ip->udp_len));
952 NetReceive(uchar *inpkt, int len)
954 struct ethernet_hdr *et;
955 struct ip_udp_hdr *ip;
959 #if defined(CONFIG_CMD_CDP)
962 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
964 debug_cond(DEBUG_NET_PKT, "packet received\n");
967 NetRxPacketLen = len;
968 et = (struct ethernet_hdr *)inpkt;
970 /* too small packet? */
971 if (len < ETHER_HDR_SIZE)
976 (*push_packet)(inpkt, len);
981 #if defined(CONFIG_CMD_CDP)
982 /* keep track if packet is CDP */
983 iscdp = is_cdp_packet(et->et_dest);
986 myvlanid = ntohs(NetOurVLAN);
987 if (myvlanid == (ushort)-1)
988 myvlanid = VLAN_NONE;
989 mynvlanid = ntohs(NetOurNativeVLAN);
990 if (mynvlanid == (ushort)-1)
991 mynvlanid = VLAN_NONE;
993 eth_proto = ntohs(et->et_protlen);
995 if (eth_proto < 1514) {
996 struct e802_hdr *et802 = (struct e802_hdr *)et;
998 * Got a 802.2 packet. Check the other protocol field.
999 * XXX VLAN over 802.2+SNAP not implemented!
1001 eth_proto = ntohs(et802->et_prot);
1003 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
1004 len -= E802_HDR_SIZE;
1006 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1007 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
1008 len -= ETHER_HDR_SIZE;
1010 } else { /* VLAN packet */
1011 struct vlan_ethernet_hdr *vet =
1012 (struct vlan_ethernet_hdr *)et;
1014 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1016 /* too small packet? */
1017 if (len < VLAN_ETHER_HDR_SIZE)
1020 /* if no VLAN active */
1021 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1022 #if defined(CONFIG_CMD_CDP)
1028 cti = ntohs(vet->vet_tag);
1029 vlanid = cti & VLAN_IDMASK;
1030 eth_proto = ntohs(vet->vet_type);
1032 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1033 len -= VLAN_ETHER_HDR_SIZE;
1036 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1038 #if defined(CONFIG_CMD_CDP)
1040 cdp_receive((uchar *)ip, len);
1045 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1046 if (vlanid == VLAN_NONE)
1047 vlanid = (mynvlanid & VLAN_IDMASK);
1049 if (vlanid != (myvlanid & VLAN_IDMASK))
1053 switch (eth_proto) {
1056 ArpReceive(et, ip, len);
1059 #ifdef CONFIG_CMD_RARP
1061 rarp_receive(ip, len);
1065 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1066 /* Before we start poking the header, make sure it is there */
1067 if (len < IP_UDP_HDR_SIZE) {
1068 debug("len bad %d < %lu\n", len,
1069 (ulong)IP_UDP_HDR_SIZE);
1072 /* Check the packet length */
1073 if (len < ntohs(ip->ip_len)) {
1074 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1077 len = ntohs(ip->ip_len);
1078 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1079 len, ip->ip_hl_v & 0xff);
1081 /* Can't deal with anything except IPv4 */
1082 if ((ip->ip_hl_v & 0xf0) != 0x40)
1084 /* Can't deal with IP options (headers != 20 bytes) */
1085 if ((ip->ip_hl_v & 0x0f) > 0x05)
1087 /* Check the Checksum of the header */
1088 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1089 debug("checksum bad\n");
1092 /* If it is not for us, ignore it */
1093 dst_ip = NetReadIP(&ip->ip_dst);
1094 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1095 #ifdef CONFIG_MCAST_TFTP
1096 if (Mcast_addr != dst_ip)
1100 /* Read source IP address for later use */
1101 src_ip = NetReadIP(&ip->ip_src);
1103 * The function returns the unchanged packet if it's not
1104 * a fragment, and either the complete packet or NULL if
1105 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1107 ip = NetDefragment(ip, &len);
1111 * watch for ICMP host redirects
1113 * There is no real handler code (yet). We just watch
1114 * for ICMP host redirect messages. In case anybody
1115 * sees these messages: please contact me
1116 * (wd@denx.de), or - even better - send me the
1117 * necessary fixes :-)
1119 * Note: in all cases where I have seen this so far
1120 * it was a problem with the router configuration,
1121 * for instance when a router was configured in the
1122 * BOOTP reply, but the TFTP server was on the same
1123 * subnet. So this is probably a warning that your
1124 * configuration might be wrong. But I'm not really
1125 * sure if there aren't any other situations.
1127 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1128 * we send a tftp packet to a dead connection, or when
1129 * there is no server at the other end.
1131 if (ip->ip_p == IPPROTO_ICMP) {
1132 receive_icmp(ip, len, src_ip, et);
1134 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1138 debug_cond(DEBUG_DEV_PKT,
1139 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1140 &dst_ip, &src_ip, len);
1142 #ifdef CONFIG_UDP_CHECKSUM
1143 if (ip->udp_xsum != 0) {
1149 xsum += (ntohs(ip->udp_len));
1150 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1151 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1152 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1153 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1155 sumlen = ntohs(ip->udp_len);
1156 sumptr = (ushort *) &(ip->udp_src);
1158 while (sumlen > 1) {
1161 sumdata = *sumptr++;
1162 xsum += ntohs(sumdata);
1168 sumdata = *(unsigned char *) sumptr;
1169 sumdata = (sumdata << 8) & 0xff00;
1172 while ((xsum >> 16) != 0) {
1173 xsum = (xsum & 0x0000ffff) +
1174 ((xsum >> 16) & 0x0000ffff);
1176 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1177 printf(" UDP wrong checksum %08lx %08x\n",
1178 xsum, ntohs(ip->udp_xsum));
1185 #ifdef CONFIG_NETCONSOLE
1186 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1190 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1193 * IP header OK. Pass the packet to the current handler.
1195 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1199 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1205 /**********************************************************************/
1207 static int net_check_prereq(enum proto_t protocol)
1211 #if defined(CONFIG_CMD_PING)
1213 if (NetPingIP == 0) {
1214 puts("*** ERROR: ping address not given\n");
1219 #if defined(CONFIG_CMD_SNTP)
1221 if (NetNtpServerIP == 0) {
1222 puts("*** ERROR: NTP server address not given\n");
1227 #if defined(CONFIG_CMD_DNS)
1229 if (NetOurDNSIP == 0) {
1230 puts("*** ERROR: DNS server address not given\n");
1235 #if defined(CONFIG_CMD_NFS)
1240 if (NetServerIP == 0) {
1241 puts("*** ERROR: `serverip' not set\n");
1244 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1245 defined(CONFIG_CMD_DNS)
1252 if (NetOurIP == 0) {
1253 puts("*** ERROR: `ipaddr' not set\n");
1258 #ifdef CONFIG_CMD_RARP
1265 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1266 int num = eth_get_dev_index();
1270 puts("*** ERROR: No ethernet found.\n");
1273 puts("*** ERROR: `ethaddr' not set\n");
1276 printf("*** ERROR: `eth%daddr' not set\n",
1290 /**********************************************************************/
1293 NetCksumOk(uchar *ptr, int len)
1295 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1300 NetCksum(uchar *ptr, int len)
1303 ushort *p = (ushort *)ptr;
1308 xsum = (xsum & 0xffff) + (xsum >> 16);
1309 xsum = (xsum & 0xffff) + (xsum >> 16);
1310 return xsum & 0xffff;
1318 myvlanid = ntohs(NetOurVLAN);
1319 if (myvlanid == (ushort)-1)
1320 myvlanid = VLAN_NONE;
1322 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1323 VLAN_ETHER_HDR_SIZE;
1327 NetSetEther(uchar *xet, uchar * addr, uint prot)
1329 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1332 myvlanid = ntohs(NetOurVLAN);
1333 if (myvlanid == (ushort)-1)
1334 myvlanid = VLAN_NONE;
1336 memcpy(et->et_dest, addr, 6);
1337 memcpy(et->et_src, NetOurEther, 6);
1338 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1339 et->et_protlen = htons(prot);
1340 return ETHER_HDR_SIZE;
1342 struct vlan_ethernet_hdr *vet =
1343 (struct vlan_ethernet_hdr *)xet;
1345 vet->vet_vlan_type = htons(PROT_VLAN);
1346 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1347 vet->vet_type = htons(prot);
1348 return VLAN_ETHER_HDR_SIZE;
1352 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1356 memcpy(et->et_dest, addr, 6);
1357 memcpy(et->et_src, NetOurEther, 6);
1358 protlen = ntohs(et->et_protlen);
1359 if (protlen == PROT_VLAN) {
1360 struct vlan_ethernet_hdr *vet =
1361 (struct vlan_ethernet_hdr *)et;
1362 vet->vet_type = htons(prot);
1363 return VLAN_ETHER_HDR_SIZE;
1364 } else if (protlen > 1514) {
1365 et->et_protlen = htons(prot);
1366 return ETHER_HDR_SIZE;
1369 struct e802_hdr *et802 = (struct e802_hdr *)et;
1370 et802->et_prot = htons(prot);
1371 return E802_HDR_SIZE;
1375 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1377 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1380 * Construct an IP header.
1382 /* IP_HDR_SIZE / 4 (not including UDP) */
1385 ip->ip_len = htons(IP_HDR_SIZE);
1386 ip->ip_id = htons(NetIPID++);
1387 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1390 /* already in network byte order */
1391 NetCopyIP((void *)&ip->ip_src, &source);
1392 /* already in network byte order */
1393 NetCopyIP((void *)&ip->ip_dst, &dest);
1396 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1399 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1402 * If the data is an odd number of bytes, zero the
1403 * byte after the last byte so that the checksum
1407 pkt[IP_UDP_HDR_SIZE + len] = 0;
1409 net_set_ip_header(pkt, dest, NetOurIP);
1410 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1411 ip->ip_p = IPPROTO_UDP;
1412 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1414 ip->udp_src = htons(sport);
1415 ip->udp_dst = htons(dport);
1416 ip->udp_len = htons(UDP_HDR_SIZE + len);
1420 void copy_filename(char *dst, const char *src, int size)
1422 if (*src && (*src == '"')) {
1427 while ((--size > 0) && *src && (*src != '"'))
1432 #if defined(CONFIG_CMD_NFS) || \
1433 defined(CONFIG_CMD_SNTP) || \
1434 defined(CONFIG_CMD_DNS)
1436 * make port a little random (1024-17407)
1437 * This keeps the math somewhat trivial to compute, and seems to work with
1438 * all supported protocols/clients/servers
1440 unsigned int random_port(void)
1442 return 1024 + (get_timer(0) % 0x4000);
1446 void ip_to_string(IPaddr_t x, char *s)
1449 sprintf(s, "%d.%d.%d.%d",
1450 (int) ((x >> 24) & 0xff),
1451 (int) ((x >> 16) & 0xff),
1452 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1456 void VLAN_to_string(ushort x, char *s)
1460 if (x == (ushort)-1)
1466 sprintf(s, "%d", x & VLAN_IDMASK);
1469 ushort string_to_VLAN(const char *s)
1474 return htons(VLAN_NONE);
1476 if (*s < '0' || *s > '9')
1479 id = (ushort)simple_strtoul(s, NULL, 10);
1484 ushort getenv_VLAN(char *var)
1486 return string_to_VLAN(getenv(var));