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 /**********************************************************************/
212 static int on_bootfile(const char *name, const char *value, enum env_op op,
217 case env_op_overwrite:
218 copy_filename(BootFile, value, sizeof(BootFile));
226 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
229 * Check if autoload is enabled. If so, use either NFS or TFTP to download
232 void net_auto_load(void)
234 #if defined(CONFIG_CMD_NFS)
235 const char *s = getenv("autoload");
237 if (s != NULL && strcmp(s, "NFS") == 0) {
239 * Use NFS to load the bootfile.
245 if (getenv_yesno("autoload") == 0) {
247 * Just use BOOTP/RARP to configure system;
248 * Do not use TFTP to load the bootfile.
250 net_set_state(NETLOOP_SUCCESS);
256 static void NetInitLoop(void)
258 static int env_changed_id;
259 int env_id = get_env_id();
261 /* update only when the environment has changed */
262 if (env_changed_id != env_id) {
263 NetOurIP = getenv_IPaddr("ipaddr");
264 NetOurGatewayIP = getenv_IPaddr("gatewayip");
265 NetOurSubnetMask = getenv_IPaddr("netmask");
266 NetServerIP = getenv_IPaddr("serverip");
267 NetOurNativeVLAN = getenv_VLAN("nvlan");
268 NetOurVLAN = getenv_VLAN("vlan");
269 #if defined(CONFIG_CMD_DNS)
270 NetOurDNSIP = getenv_IPaddr("dnsip");
272 env_changed_id = env_id;
274 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
279 static void net_clear_handlers(void)
281 net_set_udp_handler(NULL);
282 net_set_arp_handler(NULL);
283 NetSetTimeout(0, NULL);
286 static void net_cleanup_loop(void)
288 net_clear_handlers();
293 static int first_call = 1;
297 * Setup packet buffers, aligned correctly.
301 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
302 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
303 for (i = 0; i < PKTBUFSRX; i++)
304 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
307 net_clear_handlers();
309 /* Only need to setup buffer pointers once. */
316 /**********************************************************************/
318 * Main network processing loop.
321 int NetLoop(enum proto_t protocol)
329 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
331 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
333 if (eth_is_on_demand_init() || protocol != NETCONS) {
336 if (eth_init(bd) < 0) {
341 eth_init_state_only(bd);
344 net_set_state(NETLOOP_CONTINUE);
347 * Start the ball rolling with the given start function. From
348 * here on, this code is a state machine driven by received
349 * packets and timer events.
351 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
354 switch (net_check_prereq(protocol)) {
356 /* network not configured */
361 /* network device not configured */
366 NetBootFileXferSize = 0;
369 #ifdef CONFIG_CMD_TFTPPUT
372 /* always use ARP to get server ethernet address */
375 #ifdef CONFIG_CMD_TFTPSRV
380 #if defined(CONFIG_CMD_DHCP)
384 DhcpRequest(); /* Basically same as BOOTP */
394 #if defined(CONFIG_CMD_RARP)
401 #if defined(CONFIG_CMD_PING)
406 #if defined(CONFIG_CMD_NFS)
411 #if defined(CONFIG_CMD_CDP)
416 #ifdef CONFIG_NETCONSOLE
421 #if defined(CONFIG_CMD_SNTP)
426 #if defined(CONFIG_CMD_DNS)
431 #if defined(CONFIG_CMD_LINK_LOCAL)
436 #if defined(CONFIG_CMD_BOOTCE)
448 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
449 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
450 defined(CONFIG_STATUS_LED) && \
451 defined(STATUS_LED_RED)
453 * Echo the inverted link state to the fault LED.
455 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
456 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
458 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
459 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
460 #endif /* CONFIG_MII, ... */
463 * Main packet reception loop. Loop receiving packets until
464 * someone sets `net_state' to a state that terminates.
468 #ifdef CONFIG_SHOW_ACTIVITY
472 * Check the ethernet for a new packet. The ethernet
473 * receive routine will process it.
478 * Abort if ctrl-c was pressed.
481 /* cancel any ARP that may not have completed */
482 NetArpWaitPacketIP = 0;
486 /* Invalidate the last protocol */
487 eth_set_last_protocol(BOOTP);
490 /* include a debug print as well incase the debug
491 messages are directed to stderr */
492 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
499 * Check for a timeout, and run the timeout handler
502 if (timeHandler && ((get_timer(timeStart)) > timeDelta)) {
505 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
506 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
507 defined(CONFIG_STATUS_LED) && \
508 defined(STATUS_LED_RED)
510 * Echo the inverted link state to the fault LED.
512 if (miiphy_link(eth_get_dev()->name,
513 CONFIG_SYS_FAULT_MII_ADDR)) {
514 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
516 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
518 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
519 #endif /* CONFIG_MII, ... */
520 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
522 timeHandler = (thand_f *)0;
529 case NETLOOP_RESTART:
533 case NETLOOP_SUCCESS:
535 if (NetBootFileXferSize > 0) {
537 printf("Bytes transferred = %ld (%lx hex)\n",
539 NetBootFileXferSize);
540 sprintf(buf, "%lX", NetBootFileXferSize);
541 setenv("filesize", buf);
543 sprintf(buf, "%lX", (unsigned long)load_addr);
544 setenv("fileaddr", buf);
546 if (protocol != NETCONS) {
549 eth_halt_state_only();
552 eth_set_last_protocol(protocol);
554 ret = NetBootFileXferSize;
555 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
560 /* Invalidate the last protocol */
561 eth_set_last_protocol(BOOTP);
562 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
565 case NETLOOP_CONTINUE:
571 #ifdef CONFIG_CMD_TFTPPUT
572 /* Clear out the handlers */
573 net_set_udp_handler(NULL);
574 net_set_icmp_handler(NULL);
579 /**********************************************************************/
582 startAgainTimeout(void)
584 net_set_state(NETLOOP_RESTART);
587 void NetStartAgain(void)
590 int retry_forever = 0;
591 unsigned long retrycnt = 0;
593 nretry = getenv("netretry");
595 if (!strcmp(nretry, "yes"))
597 else if (!strcmp(nretry, "no"))
599 else if (!strcmp(nretry, "once"))
602 retrycnt = simple_strtoul(nretry, NULL, 0);
606 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
608 net_set_state(NETLOOP_FAIL);
615 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
616 eth_try_another(!NetRestarted);
619 if (NetRestartWrap) {
622 NetSetTimeout(10000UL, startAgainTimeout);
623 net_set_udp_handler(NULL);
625 net_set_state(NETLOOP_FAIL);
628 net_set_state(NETLOOP_RESTART);
632 /**********************************************************************/
637 static void dummy_handler(uchar *pkt, unsigned dport,
638 IPaddr_t sip, unsigned sport,
643 rxhand_f *net_get_udp_handler(void)
645 return udp_packet_handler;
648 void net_set_udp_handler(rxhand_f *f)
650 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
652 udp_packet_handler = dummy_handler;
654 udp_packet_handler = f;
657 rxhand_f *net_get_arp_handler(void)
659 return arp_packet_handler;
662 void net_set_arp_handler(rxhand_f *f)
664 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
666 arp_packet_handler = dummy_handler;
668 arp_packet_handler = f;
671 #ifdef CONFIG_CMD_TFTPPUT
672 void net_set_icmp_handler(rxhand_icmp_f *f)
674 packet_icmp_handler = f;
679 NetSetTimeout(ulong iv, thand_f *f)
682 debug_cond(DEBUG_INT_STATE,
683 "--- NetLoop timeout handler cancelled\n");
684 timeHandler = (thand_f *)0;
686 debug_cond(DEBUG_INT_STATE,
687 "--- NetLoop timeout handler set (%p)\n", f);
689 timeStart = get_timer(0);
690 timeDelta = iv * CONFIG_SYS_HZ / 1000;
694 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
701 /* make sure the NetTxPacket is initialized (NetInit() was called) */
702 assert(NetTxPacket != NULL);
703 if (NetTxPacket == NULL)
706 /* convert to new style broadcast */
710 /* if broadcast, make the ether address a broadcast and don't do ARP */
711 if (dest == 0xFFFFFFFF)
712 ether = NetBcastAddr;
714 pkt = (uchar *)NetTxPacket;
716 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
718 net_set_udp_header(pkt, dest, dport, sport, payload_len);
719 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
721 /* if MAC address was not discovered yet, do an ARP request */
722 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
723 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
725 /* save the ip and eth addr for the packet to send after arp */
726 NetArpWaitPacketIP = dest;
727 NetArpWaitPacketMAC = ether;
729 /* size of the waiting packet */
730 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
732 /* and do the ARP request */
734 NetArpWaitTimerStart = get_timer(0);
736 return 1; /* waiting */
738 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
740 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
741 return 0; /* transmitted */
745 #ifdef CONFIG_IP_DEFRAG
747 * This function collects fragments in a single packet, according
748 * to the algorithm in RFC815. It returns NULL or the pointer to
749 * a complete packet, in static storage
751 #ifndef CONFIG_NET_MAXDEFRAG
752 #define CONFIG_NET_MAXDEFRAG 16384
755 * MAXDEFRAG, above, is chosen in the config file and is real data
756 * so we need to add the NFS overhead, which is more than TFTP.
757 * To use sizeof in the internal unnamed structures, we need a real
758 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
759 * The compiler doesn't complain nor allocates the actual structure
761 static struct rpc_t rpc_specimen;
762 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
764 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
767 * this is the packet being assembled, either data or frag control.
768 * Fragments go by 8 bytes, so this union must be 8 bytes long
771 /* first_byte is address of this structure */
772 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
773 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
774 u16 prev_hole; /* index of prev, 0 == none */
778 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
780 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
781 static u16 first_hole, total_len;
782 struct hole *payload, *thisfrag, *h, *newh;
783 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
784 uchar *indata = (uchar *)ip;
785 int offset8, start, len, done = 0;
786 u16 ip_off = ntohs(ip->ip_off);
788 /* payload starts after IP header, this fragment is in there */
789 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
790 offset8 = (ip_off & IP_OFFS);
791 thisfrag = payload + offset8;
793 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
795 if (start + len > IP_MAXUDP) /* fragment extends too far */
798 if (!total_len || localip->ip_id != ip->ip_id) {
799 /* new (or different) packet, reset structs */
801 payload[0].last_byte = ~0;
802 payload[0].next_hole = 0;
803 payload[0].prev_hole = 0;
805 /* any IP header will work, copy the first we received */
806 memcpy(localip, ip, IP_HDR_SIZE);
810 * What follows is the reassembly algorithm. We use the payload
811 * array as a linked list of hole descriptors, as each hole starts
812 * at a multiple of 8 bytes. However, last byte can be whatever value,
813 * so it is represented as byte count, not as 8-byte blocks.
816 h = payload + first_hole;
817 while (h->last_byte < start) {
819 /* no hole that far away */
822 h = payload + h->next_hole;
825 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
826 if (offset8 + ((len + 7) / 8) <= h - payload) {
827 /* no overlap with holes (dup fragment?) */
831 if (!(ip_off & IP_FLAGS_MFRAG)) {
832 /* no more fragmentss: truncate this (last) hole */
833 total_len = start + len;
834 h->last_byte = start + len;
838 * There is some overlap: fix the hole list. This code doesn't
839 * deal with a fragment that overlaps with two different holes
840 * (thus being a superset of a previously-received fragment).
843 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
844 /* complete overlap with hole: remove hole */
845 if (!h->prev_hole && !h->next_hole) {
846 /* last remaining hole */
848 } else if (!h->prev_hole) {
850 first_hole = h->next_hole;
851 payload[h->next_hole].prev_hole = 0;
852 } else if (!h->next_hole) {
854 payload[h->prev_hole].next_hole = 0;
856 /* in the middle of the list */
857 payload[h->next_hole].prev_hole = h->prev_hole;
858 payload[h->prev_hole].next_hole = h->next_hole;
861 } else if (h->last_byte <= start + len) {
862 /* overlaps with final part of the hole: shorten this hole */
863 h->last_byte = start;
865 } else if (h >= thisfrag) {
866 /* overlaps with initial part of the hole: move this hole */
867 newh = thisfrag + (len / 8);
871 payload[h->next_hole].prev_hole = (h - payload);
873 payload[h->prev_hole].next_hole = (h - payload);
875 first_hole = (h - payload);
878 /* fragment sits in the middle: split the hole */
879 newh = thisfrag + (len / 8);
881 h->last_byte = start;
882 h->next_hole = (newh - payload);
883 newh->prev_hole = (h - payload);
885 payload[newh->next_hole].prev_hole = (newh - payload);
888 /* finally copy this fragment and possibly return whole packet */
889 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
893 localip->ip_len = htons(total_len);
894 *lenp = total_len + IP_HDR_SIZE;
898 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
900 u16 ip_off = ntohs(ip->ip_off);
901 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
902 return ip; /* not a fragment */
903 return __NetDefragment(ip, lenp);
906 #else /* !CONFIG_IP_DEFRAG */
908 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
910 u16 ip_off = ntohs(ip->ip_off);
911 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
912 return ip; /* not a fragment */
918 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
921 * @parma ip IP packet containing the ICMP
923 static void receive_icmp(struct ip_udp_hdr *ip, int len,
924 IPaddr_t src_ip, struct ethernet_hdr *et)
926 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
928 switch (icmph->type) {
930 if (icmph->code != ICMP_REDIR_HOST)
932 printf(" ICMP Host Redirect to %pI4 ",
936 #if defined(CONFIG_CMD_PING)
937 ping_receive(et, ip, len);
939 #ifdef CONFIG_CMD_TFTPPUT
940 if (packet_icmp_handler)
941 packet_icmp_handler(icmph->type, icmph->code,
942 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
943 icmph->un.data, ntohs(ip->udp_len));
950 NetReceive(uchar *inpkt, int len)
952 struct ethernet_hdr *et;
953 struct ip_udp_hdr *ip;
957 #if defined(CONFIG_CMD_CDP)
960 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
962 debug_cond(DEBUG_NET_PKT, "packet received\n");
965 NetRxPacketLen = len;
966 et = (struct ethernet_hdr *)inpkt;
968 /* too small packet? */
969 if (len < ETHER_HDR_SIZE)
974 (*push_packet)(inpkt, len);
979 #if defined(CONFIG_CMD_CDP)
980 /* keep track if packet is CDP */
981 iscdp = is_cdp_packet(et->et_dest);
984 myvlanid = ntohs(NetOurVLAN);
985 if (myvlanid == (ushort)-1)
986 myvlanid = VLAN_NONE;
987 mynvlanid = ntohs(NetOurNativeVLAN);
988 if (mynvlanid == (ushort)-1)
989 mynvlanid = VLAN_NONE;
991 eth_proto = ntohs(et->et_protlen);
993 if (eth_proto < 1514) {
994 struct e802_hdr *et802 = (struct e802_hdr *)et;
996 * Got a 802.2 packet. Check the other protocol field.
997 * XXX VLAN over 802.2+SNAP not implemented!
999 eth_proto = ntohs(et802->et_prot);
1001 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
1002 len -= E802_HDR_SIZE;
1004 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1005 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
1006 len -= ETHER_HDR_SIZE;
1008 } else { /* VLAN packet */
1009 struct vlan_ethernet_hdr *vet =
1010 (struct vlan_ethernet_hdr *)et;
1012 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1014 /* too small packet? */
1015 if (len < VLAN_ETHER_HDR_SIZE)
1018 /* if no VLAN active */
1019 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1020 #if defined(CONFIG_CMD_CDP)
1026 cti = ntohs(vet->vet_tag);
1027 vlanid = cti & VLAN_IDMASK;
1028 eth_proto = ntohs(vet->vet_type);
1030 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1031 len -= VLAN_ETHER_HDR_SIZE;
1034 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1036 #if defined(CONFIG_CMD_CDP)
1038 cdp_receive((uchar *)ip, len);
1043 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1044 if (vlanid == VLAN_NONE)
1045 vlanid = (mynvlanid & VLAN_IDMASK);
1047 if (vlanid != (myvlanid & VLAN_IDMASK))
1051 switch (eth_proto) {
1054 ArpReceive(et, ip, len);
1057 #ifdef CONFIG_CMD_RARP
1059 rarp_receive(ip, len);
1063 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1064 /* Before we start poking the header, make sure it is there */
1065 if (len < IP_UDP_HDR_SIZE) {
1066 debug("len bad %d < %lu\n", len,
1067 (ulong)IP_UDP_HDR_SIZE);
1070 /* Check the packet length */
1071 if (len < ntohs(ip->ip_len)) {
1072 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1075 len = ntohs(ip->ip_len);
1076 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1077 len, ip->ip_hl_v & 0xff);
1079 /* Can't deal with anything except IPv4 */
1080 if ((ip->ip_hl_v & 0xf0) != 0x40)
1082 /* Can't deal with IP options (headers != 20 bytes) */
1083 if ((ip->ip_hl_v & 0x0f) > 0x05)
1085 /* Check the Checksum of the header */
1086 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1087 debug("checksum bad\n");
1090 /* If it is not for us, ignore it */
1091 dst_ip = NetReadIP(&ip->ip_dst);
1092 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1093 #ifdef CONFIG_MCAST_TFTP
1094 if (Mcast_addr != dst_ip)
1098 /* Read source IP address for later use */
1099 src_ip = NetReadIP(&ip->ip_src);
1101 * The function returns the unchanged packet if it's not
1102 * a fragment, and either the complete packet or NULL if
1103 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1105 ip = NetDefragment(ip, &len);
1109 * watch for ICMP host redirects
1111 * There is no real handler code (yet). We just watch
1112 * for ICMP host redirect messages. In case anybody
1113 * sees these messages: please contact me
1114 * (wd@denx.de), or - even better - send me the
1115 * necessary fixes :-)
1117 * Note: in all cases where I have seen this so far
1118 * it was a problem with the router configuration,
1119 * for instance when a router was configured in the
1120 * BOOTP reply, but the TFTP server was on the same
1121 * subnet. So this is probably a warning that your
1122 * configuration might be wrong. But I'm not really
1123 * sure if there aren't any other situations.
1125 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1126 * we send a tftp packet to a dead connection, or when
1127 * there is no server at the other end.
1129 if (ip->ip_p == IPPROTO_ICMP) {
1130 receive_icmp(ip, len, src_ip, et);
1132 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1136 debug_cond(DEBUG_DEV_PKT,
1137 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1138 &dst_ip, &src_ip, len);
1140 #ifdef CONFIG_UDP_CHECKSUM
1141 if (ip->udp_xsum != 0) {
1147 xsum += (ntohs(ip->udp_len));
1148 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1149 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1150 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1151 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1153 sumlen = ntohs(ip->udp_len);
1154 sumptr = (ushort *) &(ip->udp_src);
1156 while (sumlen > 1) {
1159 sumdata = *sumptr++;
1160 xsum += ntohs(sumdata);
1166 sumdata = *(unsigned char *) sumptr;
1167 sumdata = (sumdata << 8) & 0xff00;
1170 while ((xsum >> 16) != 0) {
1171 xsum = (xsum & 0x0000ffff) +
1172 ((xsum >> 16) & 0x0000ffff);
1174 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1175 printf(" UDP wrong checksum %08lx %08x\n",
1176 xsum, ntohs(ip->udp_xsum));
1183 #ifdef CONFIG_NETCONSOLE
1184 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1188 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1191 * IP header OK. Pass the packet to the current handler.
1193 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1197 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1203 /**********************************************************************/
1205 static int net_check_prereq(enum proto_t protocol)
1208 #if defined(CONFIG_CMD_PING)
1210 if (NetPingIP == 0) {
1211 puts("*** ERROR: ping address not given\n");
1216 #if defined(CONFIG_CMD_SNTP)
1218 if (NetNtpServerIP == 0) {
1219 puts("*** ERROR: NTP server address not given\n");
1224 #if defined(CONFIG_CMD_DNS)
1226 if (NetOurDNSIP == 0) {
1227 puts("*** ERROR: DNS server address not given\n");
1232 #if defined(CONFIG_CMD_NFS)
1237 if (NetServerIP == 0) {
1238 puts("*** ERROR: `serverip' not set\n");
1241 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1242 defined(CONFIG_CMD_DNS)
1250 if (NetOurIP == 0) {
1251 puts("*** ERROR: `ipaddr' not set\n");
1256 #ifdef CONFIG_CMD_RARP
1263 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1264 int num = eth_get_dev_index();
1268 puts("*** ERROR: No ethernet found.\n");
1271 puts("*** ERROR: `ethaddr' not set\n");
1274 printf("*** ERROR: `eth%daddr' not set\n",
1288 /**********************************************************************/
1291 NetCksumOk(uchar *ptr, int len)
1293 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1298 NetCksum(uchar *ptr, int len)
1301 ushort *p = (ushort *)ptr;
1306 xsum = (xsum & 0xffff) + (xsum >> 16);
1307 xsum = (xsum & 0xffff) + (xsum >> 16);
1308 return xsum & 0xffff;
1316 myvlanid = ntohs(NetOurVLAN);
1317 if (myvlanid == (ushort)-1)
1318 myvlanid = VLAN_NONE;
1320 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1321 VLAN_ETHER_HDR_SIZE;
1325 NetSetEther(uchar *xet, uchar * addr, uint prot)
1327 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1330 myvlanid = ntohs(NetOurVLAN);
1331 if (myvlanid == (ushort)-1)
1332 myvlanid = VLAN_NONE;
1334 memcpy(et->et_dest, addr, 6);
1335 memcpy(et->et_src, NetOurEther, 6);
1336 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1337 et->et_protlen = htons(prot);
1338 return ETHER_HDR_SIZE;
1340 struct vlan_ethernet_hdr *vet =
1341 (struct vlan_ethernet_hdr *)xet;
1343 vet->vet_vlan_type = htons(PROT_VLAN);
1344 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1345 vet->vet_type = htons(prot);
1346 return VLAN_ETHER_HDR_SIZE;
1350 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1354 memcpy(et->et_dest, addr, 6);
1355 memcpy(et->et_src, NetOurEther, 6);
1356 protlen = ntohs(et->et_protlen);
1357 if (protlen == PROT_VLAN) {
1358 struct vlan_ethernet_hdr *vet =
1359 (struct vlan_ethernet_hdr *)et;
1360 vet->vet_type = htons(prot);
1361 return VLAN_ETHER_HDR_SIZE;
1362 } else if (protlen > 1514) {
1363 et->et_protlen = htons(prot);
1364 return ETHER_HDR_SIZE;
1367 struct e802_hdr *et802 = (struct e802_hdr *)et;
1368 et802->et_prot = htons(prot);
1369 return E802_HDR_SIZE;
1373 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1375 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1378 * Construct an IP header.
1380 /* IP_HDR_SIZE / 4 (not including UDP) */
1383 ip->ip_len = htons(IP_HDR_SIZE);
1384 ip->ip_id = htons(NetIPID++);
1385 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1388 /* already in network byte order */
1389 NetCopyIP((void *)&ip->ip_src, &source);
1390 /* already in network byte order */
1391 NetCopyIP((void *)&ip->ip_dst, &dest);
1394 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1397 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1400 * If the data is an odd number of bytes, zero the
1401 * byte after the last byte so that the checksum
1405 pkt[IP_UDP_HDR_SIZE + len] = 0;
1407 net_set_ip_header(pkt, dest, NetOurIP);
1408 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1409 ip->ip_p = IPPROTO_UDP;
1410 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1412 ip->udp_src = htons(sport);
1413 ip->udp_dst = htons(dport);
1414 ip->udp_len = htons(UDP_HDR_SIZE + len);
1418 void copy_filename(char *dst, const char *src, int size)
1420 if (*src && (*src == '"')) {
1425 while ((--size > 0) && *src && (*src != '"'))
1430 #if defined(CONFIG_CMD_NFS) || \
1431 defined(CONFIG_CMD_SNTP) || \
1432 defined(CONFIG_CMD_DNS)
1434 * make port a little random (1024-17407)
1435 * This keeps the math somewhat trivial to compute, and seems to work with
1436 * all supported protocols/clients/servers
1438 unsigned int random_port(void)
1440 return 1024 + (get_timer(0) % 0x4000);
1444 void ip_to_string(IPaddr_t x, char *s)
1447 sprintf(s, "%d.%d.%d.%d",
1448 (int) ((x >> 24) & 0xff),
1449 (int) ((x >> 16) & 0xff),
1450 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1454 void VLAN_to_string(ushort x, char *s)
1458 if (x == (ushort)-1)
1464 sprintf(s, "%d", x & VLAN_IDMASK);
1467 ushort string_to_VLAN(const char *s)
1472 return htons(VLAN_NONE);
1474 if (*s < '0' || *s > '9')
1477 id = (ushort)simple_strtoul(s, NULL, 10);
1482 ushort getenv_VLAN(char *var)
1484 return string_to_VLAN(getenv(var));