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)
443 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
444 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
445 defined(CONFIG_STATUS_LED) && \
446 defined(STATUS_LED_RED)
448 * Echo the inverted link state to the fault LED.
450 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
451 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
453 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
454 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
455 #endif /* CONFIG_MII, ... */
458 * Main packet reception loop. Loop receiving packets until
459 * someone sets `net_state' to a state that terminates.
463 #ifdef CONFIG_SHOW_ACTIVITY
467 * Check the ethernet for a new packet. The ethernet
468 * receive routine will process it.
473 * Abort if ctrl-c was pressed.
476 /* cancel any ARP that may not have completed */
477 NetArpWaitPacketIP = 0;
481 /* Invalidate the last protocol */
482 eth_set_last_protocol(BOOTP);
485 /* include a debug print as well incase the debug
486 messages are directed to stderr */
487 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
494 * Check for a timeout, and run the timeout handler
497 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
500 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
501 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
502 defined(CONFIG_STATUS_LED) && \
503 defined(STATUS_LED_RED)
505 * Echo the inverted link state to the fault LED.
507 if (miiphy_link(eth_get_dev()->name,
508 CONFIG_SYS_FAULT_MII_ADDR)) {
509 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
511 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
513 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
514 #endif /* CONFIG_MII, ... */
515 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
517 timeHandler = (thand_f *)0;
524 case NETLOOP_RESTART:
528 case NETLOOP_SUCCESS:
530 if (NetBootFileXferSize > 0) {
531 printf("Bytes transferred = %ld (%lx hex)\n",
533 NetBootFileXferSize);
534 setenv_hex("filesize", NetBootFileXferSize);
535 setenv_hex("fileaddr", load_addr);
537 if (protocol != NETCONS)
540 eth_halt_state_only();
542 eth_set_last_protocol(protocol);
544 ret = NetBootFileXferSize;
545 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
550 /* Invalidate the last protocol */
551 eth_set_last_protocol(BOOTP);
552 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
555 case NETLOOP_CONTINUE:
561 #ifdef CONFIG_CMD_TFTPPUT
562 /* Clear out the handlers */
563 net_set_udp_handler(NULL);
564 net_set_icmp_handler(NULL);
569 /**********************************************************************/
572 startAgainTimeout(void)
574 net_set_state(NETLOOP_RESTART);
577 void NetStartAgain(void)
580 int retry_forever = 0;
581 unsigned long retrycnt = 0;
583 nretry = getenv("netretry");
585 if (!strcmp(nretry, "yes"))
587 else if (!strcmp(nretry, "no"))
589 else if (!strcmp(nretry, "once"))
592 retrycnt = simple_strtoul(nretry, NULL, 0);
596 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
598 net_set_state(NETLOOP_FAIL);
605 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
606 eth_try_another(!NetRestarted);
609 if (NetRestartWrap) {
612 NetSetTimeout(10000UL, startAgainTimeout);
613 net_set_udp_handler(NULL);
615 net_set_state(NETLOOP_FAIL);
618 net_set_state(NETLOOP_RESTART);
622 /**********************************************************************/
627 static void dummy_handler(uchar *pkt, unsigned dport,
628 IPaddr_t sip, unsigned sport,
633 rxhand_f *net_get_udp_handler(void)
635 return udp_packet_handler;
638 void net_set_udp_handler(rxhand_f *f)
640 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
642 udp_packet_handler = dummy_handler;
644 udp_packet_handler = f;
647 rxhand_f *net_get_arp_handler(void)
649 return arp_packet_handler;
652 void net_set_arp_handler(rxhand_f *f)
654 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
656 arp_packet_handler = dummy_handler;
658 arp_packet_handler = f;
661 #ifdef CONFIG_CMD_TFTPPUT
662 void net_set_icmp_handler(rxhand_icmp_f *f)
664 packet_icmp_handler = f;
669 NetSetTimeout(ulong iv, thand_f *f)
672 debug_cond(DEBUG_INT_STATE,
673 "--- NetLoop timeout handler cancelled\n");
674 timeHandler = (thand_f *)0;
676 debug_cond(DEBUG_INT_STATE,
677 "--- NetLoop timeout handler set (%p)\n", f);
679 timeStart = get_timer(0);
680 timeDelta = iv * CONFIG_SYS_HZ / 1000;
684 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
691 /* make sure the NetTxPacket is initialized (NetInit() was called) */
692 assert(NetTxPacket != NULL);
693 if (NetTxPacket == NULL)
696 /* convert to new style broadcast */
700 /* if broadcast, make the ether address a broadcast and don't do ARP */
701 if (dest == 0xFFFFFFFF)
702 ether = NetBcastAddr;
704 pkt = (uchar *)NetTxPacket;
706 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
708 net_set_udp_header(pkt, dest, dport, sport, payload_len);
709 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
711 /* if MAC address was not discovered yet, do an ARP request */
712 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
713 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
715 /* save the ip and eth addr for the packet to send after arp */
716 NetArpWaitPacketIP = dest;
717 NetArpWaitPacketMAC = ether;
719 /* size of the waiting packet */
720 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
722 /* and do the ARP request */
724 NetArpWaitTimerStart = get_timer(0);
726 return 1; /* waiting */
728 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
730 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
731 return 0; /* transmitted */
735 #ifdef CONFIG_IP_DEFRAG
737 * This function collects fragments in a single packet, according
738 * to the algorithm in RFC815. It returns NULL or the pointer to
739 * a complete packet, in static storage
741 #ifndef CONFIG_NET_MAXDEFRAG
742 #define CONFIG_NET_MAXDEFRAG 16384
745 * MAXDEFRAG, above, is chosen in the config file and is real data
746 * so we need to add the NFS overhead, which is more than TFTP.
747 * To use sizeof in the internal unnamed structures, we need a real
748 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
749 * The compiler doesn't complain nor allocates the actual structure
751 static struct rpc_t rpc_specimen;
752 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
754 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
757 * this is the packet being assembled, either data or frag control.
758 * Fragments go by 8 bytes, so this union must be 8 bytes long
761 /* first_byte is address of this structure */
762 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
763 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
764 u16 prev_hole; /* index of prev, 0 == none */
768 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
770 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
771 static u16 first_hole, total_len;
772 struct hole *payload, *thisfrag, *h, *newh;
773 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
774 uchar *indata = (uchar *)ip;
775 int offset8, start, len, done = 0;
776 u16 ip_off = ntohs(ip->ip_off);
778 /* payload starts after IP header, this fragment is in there */
779 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
780 offset8 = (ip_off & IP_OFFS);
781 thisfrag = payload + offset8;
783 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
785 if (start + len > IP_MAXUDP) /* fragment extends too far */
788 if (!total_len || localip->ip_id != ip->ip_id) {
789 /* new (or different) packet, reset structs */
791 payload[0].last_byte = ~0;
792 payload[0].next_hole = 0;
793 payload[0].prev_hole = 0;
795 /* any IP header will work, copy the first we received */
796 memcpy(localip, ip, IP_HDR_SIZE);
800 * What follows is the reassembly algorithm. We use the payload
801 * array as a linked list of hole descriptors, as each hole starts
802 * at a multiple of 8 bytes. However, last byte can be whatever value,
803 * so it is represented as byte count, not as 8-byte blocks.
806 h = payload + first_hole;
807 while (h->last_byte < start) {
809 /* no hole that far away */
812 h = payload + h->next_hole;
815 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
816 if (offset8 + ((len + 7) / 8) <= h - payload) {
817 /* no overlap with holes (dup fragment?) */
821 if (!(ip_off & IP_FLAGS_MFRAG)) {
822 /* no more fragmentss: truncate this (last) hole */
823 total_len = start + len;
824 h->last_byte = start + len;
828 * There is some overlap: fix the hole list. This code doesn't
829 * deal with a fragment that overlaps with two different holes
830 * (thus being a superset of a previously-received fragment).
833 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
834 /* complete overlap with hole: remove hole */
835 if (!h->prev_hole && !h->next_hole) {
836 /* last remaining hole */
838 } else if (!h->prev_hole) {
840 first_hole = h->next_hole;
841 payload[h->next_hole].prev_hole = 0;
842 } else if (!h->next_hole) {
844 payload[h->prev_hole].next_hole = 0;
846 /* in the middle of the list */
847 payload[h->next_hole].prev_hole = h->prev_hole;
848 payload[h->prev_hole].next_hole = h->next_hole;
851 } else if (h->last_byte <= start + len) {
852 /* overlaps with final part of the hole: shorten this hole */
853 h->last_byte = start;
855 } else if (h >= thisfrag) {
856 /* overlaps with initial part of the hole: move this hole */
857 newh = thisfrag + (len / 8);
861 payload[h->next_hole].prev_hole = (h - payload);
863 payload[h->prev_hole].next_hole = (h - payload);
865 first_hole = (h - payload);
868 /* fragment sits in the middle: split the hole */
869 newh = thisfrag + (len / 8);
871 h->last_byte = start;
872 h->next_hole = (newh - payload);
873 newh->prev_hole = (h - payload);
875 payload[newh->next_hole].prev_hole = (newh - payload);
878 /* finally copy this fragment and possibly return whole packet */
879 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
883 localip->ip_len = htons(total_len);
884 *lenp = total_len + IP_HDR_SIZE;
888 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
890 u16 ip_off = ntohs(ip->ip_off);
891 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
892 return ip; /* not a fragment */
893 return __NetDefragment(ip, lenp);
896 #else /* !CONFIG_IP_DEFRAG */
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 */
908 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
911 * @parma ip IP packet containing the ICMP
913 static void receive_icmp(struct ip_udp_hdr *ip, int len,
914 IPaddr_t src_ip, struct ethernet_hdr *et)
916 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
918 switch (icmph->type) {
920 if (icmph->code != ICMP_REDIR_HOST)
922 printf(" ICMP Host Redirect to %pI4 ",
926 #if defined(CONFIG_CMD_PING)
927 ping_receive(et, ip, len);
929 #ifdef CONFIG_CMD_TFTPPUT
930 if (packet_icmp_handler)
931 packet_icmp_handler(icmph->type, icmph->code,
932 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
933 icmph->un.data, ntohs(ip->udp_len));
940 NetReceive(uchar *inpkt, int len)
942 struct ethernet_hdr *et;
943 struct ip_udp_hdr *ip;
947 #if defined(CONFIG_CMD_CDP)
950 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
952 debug_cond(DEBUG_NET_PKT, "packet received\n");
955 NetRxPacketLen = len;
956 et = (struct ethernet_hdr *)inpkt;
958 /* too small packet? */
959 if (len < ETHER_HDR_SIZE)
964 (*push_packet)(inpkt, len);
969 #if defined(CONFIG_CMD_CDP)
970 /* keep track if packet is CDP */
971 iscdp = is_cdp_packet(et->et_dest);
974 myvlanid = ntohs(NetOurVLAN);
975 if (myvlanid == (ushort)-1)
976 myvlanid = VLAN_NONE;
977 mynvlanid = ntohs(NetOurNativeVLAN);
978 if (mynvlanid == (ushort)-1)
979 mynvlanid = VLAN_NONE;
981 eth_proto = ntohs(et->et_protlen);
983 if (eth_proto < 1514) {
984 struct e802_hdr *et802 = (struct e802_hdr *)et;
986 * Got a 802.2 packet. Check the other protocol field.
987 * XXX VLAN over 802.2+SNAP not implemented!
989 eth_proto = ntohs(et802->et_prot);
991 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
992 len -= E802_HDR_SIZE;
994 } else if (eth_proto != PROT_VLAN) { /* normal packet */
995 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
996 len -= ETHER_HDR_SIZE;
998 } else { /* VLAN packet */
999 struct vlan_ethernet_hdr *vet =
1000 (struct vlan_ethernet_hdr *)et;
1002 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1004 /* too small packet? */
1005 if (len < VLAN_ETHER_HDR_SIZE)
1008 /* if no VLAN active */
1009 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1010 #if defined(CONFIG_CMD_CDP)
1016 cti = ntohs(vet->vet_tag);
1017 vlanid = cti & VLAN_IDMASK;
1018 eth_proto = ntohs(vet->vet_type);
1020 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1021 len -= VLAN_ETHER_HDR_SIZE;
1024 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1026 #if defined(CONFIG_CMD_CDP)
1028 cdp_receive((uchar *)ip, len);
1033 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1034 if (vlanid == VLAN_NONE)
1035 vlanid = (mynvlanid & VLAN_IDMASK);
1037 if (vlanid != (myvlanid & VLAN_IDMASK))
1041 switch (eth_proto) {
1044 ArpReceive(et, ip, len);
1047 #ifdef CONFIG_CMD_RARP
1049 rarp_receive(ip, len);
1053 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1054 /* Before we start poking the header, make sure it is there */
1055 if (len < IP_UDP_HDR_SIZE) {
1056 debug("len bad %d < %lu\n", len,
1057 (ulong)IP_UDP_HDR_SIZE);
1060 /* Check the packet length */
1061 if (len < ntohs(ip->ip_len)) {
1062 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1065 len = ntohs(ip->ip_len);
1066 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1067 len, ip->ip_hl_v & 0xff);
1069 /* Can't deal with anything except IPv4 */
1070 if ((ip->ip_hl_v & 0xf0) != 0x40)
1072 /* Can't deal with IP options (headers != 20 bytes) */
1073 if ((ip->ip_hl_v & 0x0f) > 0x05)
1075 /* Check the Checksum of the header */
1076 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1077 debug("checksum bad\n");
1080 /* If it is not for us, ignore it */
1081 dst_ip = NetReadIP(&ip->ip_dst);
1082 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1083 #ifdef CONFIG_MCAST_TFTP
1084 if (Mcast_addr != dst_ip)
1088 /* Read source IP address for later use */
1089 src_ip = NetReadIP(&ip->ip_src);
1091 * The function returns the unchanged packet if it's not
1092 * a fragment, and either the complete packet or NULL if
1093 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1095 ip = NetDefragment(ip, &len);
1099 * watch for ICMP host redirects
1101 * There is no real handler code (yet). We just watch
1102 * for ICMP host redirect messages. In case anybody
1103 * sees these messages: please contact me
1104 * (wd@denx.de), or - even better - send me the
1105 * necessary fixes :-)
1107 * Note: in all cases where I have seen this so far
1108 * it was a problem with the router configuration,
1109 * for instance when a router was configured in the
1110 * BOOTP reply, but the TFTP server was on the same
1111 * subnet. So this is probably a warning that your
1112 * configuration might be wrong. But I'm not really
1113 * sure if there aren't any other situations.
1115 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1116 * we send a tftp packet to a dead connection, or when
1117 * there is no server at the other end.
1119 if (ip->ip_p == IPPROTO_ICMP) {
1120 receive_icmp(ip, len, src_ip, et);
1122 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1126 debug_cond(DEBUG_DEV_PKT,
1127 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1128 &dst_ip, &src_ip, len);
1130 #ifdef CONFIG_UDP_CHECKSUM
1131 if (ip->udp_xsum != 0) {
1137 xsum += (ntohs(ip->udp_len));
1138 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1139 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1140 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1141 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1143 sumlen = ntohs(ip->udp_len);
1144 sumptr = (ushort *) &(ip->udp_src);
1146 while (sumlen > 1) {
1149 sumdata = *sumptr++;
1150 xsum += ntohs(sumdata);
1156 sumdata = *(unsigned char *) sumptr;
1157 sumdata = (sumdata << 8) & 0xff00;
1160 while ((xsum >> 16) != 0) {
1161 xsum = (xsum & 0x0000ffff) +
1162 ((xsum >> 16) & 0x0000ffff);
1164 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1165 printf(" UDP wrong checksum %08lx %08x\n",
1166 xsum, ntohs(ip->udp_xsum));
1173 #ifdef CONFIG_NETCONSOLE
1174 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1178 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1181 * IP header OK. Pass the packet to the current handler.
1183 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1187 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1193 /**********************************************************************/
1195 static int net_check_prereq(enum proto_t protocol)
1199 #if defined(CONFIG_CMD_PING)
1201 if (NetPingIP == 0) {
1202 puts("*** ERROR: ping address not given\n");
1207 #if defined(CONFIG_CMD_SNTP)
1209 if (NetNtpServerIP == 0) {
1210 puts("*** ERROR: NTP server address not given\n");
1215 #if defined(CONFIG_CMD_DNS)
1217 if (NetOurDNSIP == 0) {
1218 puts("*** ERROR: DNS server address not given\n");
1223 #if defined(CONFIG_CMD_NFS)
1228 if (NetServerIP == 0) {
1229 puts("*** ERROR: `serverip' not set\n");
1232 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1233 defined(CONFIG_CMD_DNS)
1240 if (NetOurIP == 0) {
1241 puts("*** ERROR: `ipaddr' not set\n");
1246 #ifdef CONFIG_CMD_RARP
1253 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1254 int num = eth_get_dev_index();
1258 puts("*** ERROR: No ethernet found.\n");
1261 puts("*** ERROR: `ethaddr' not set\n");
1264 printf("*** ERROR: `eth%daddr' not set\n",
1278 /**********************************************************************/
1281 NetCksumOk(uchar *ptr, int len)
1283 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1288 NetCksum(uchar *ptr, int len)
1291 ushort *p = (ushort *)ptr;
1296 xsum = (xsum & 0xffff) + (xsum >> 16);
1297 xsum = (xsum & 0xffff) + (xsum >> 16);
1298 return xsum & 0xffff;
1306 myvlanid = ntohs(NetOurVLAN);
1307 if (myvlanid == (ushort)-1)
1308 myvlanid = VLAN_NONE;
1310 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1311 VLAN_ETHER_HDR_SIZE;
1315 NetSetEther(uchar *xet, uchar * addr, uint prot)
1317 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1320 myvlanid = ntohs(NetOurVLAN);
1321 if (myvlanid == (ushort)-1)
1322 myvlanid = VLAN_NONE;
1324 memcpy(et->et_dest, addr, 6);
1325 memcpy(et->et_src, NetOurEther, 6);
1326 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1327 et->et_protlen = htons(prot);
1328 return ETHER_HDR_SIZE;
1330 struct vlan_ethernet_hdr *vet =
1331 (struct vlan_ethernet_hdr *)xet;
1333 vet->vet_vlan_type = htons(PROT_VLAN);
1334 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1335 vet->vet_type = htons(prot);
1336 return VLAN_ETHER_HDR_SIZE;
1340 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1344 memcpy(et->et_dest, addr, 6);
1345 memcpy(et->et_src, NetOurEther, 6);
1346 protlen = ntohs(et->et_protlen);
1347 if (protlen == PROT_VLAN) {
1348 struct vlan_ethernet_hdr *vet =
1349 (struct vlan_ethernet_hdr *)et;
1350 vet->vet_type = htons(prot);
1351 return VLAN_ETHER_HDR_SIZE;
1352 } else if (protlen > 1514) {
1353 et->et_protlen = htons(prot);
1354 return ETHER_HDR_SIZE;
1357 struct e802_hdr *et802 = (struct e802_hdr *)et;
1358 et802->et_prot = htons(prot);
1359 return E802_HDR_SIZE;
1363 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1365 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1368 * Construct an IP header.
1370 /* IP_HDR_SIZE / 4 (not including UDP) */
1373 ip->ip_len = htons(IP_HDR_SIZE);
1374 ip->ip_id = htons(NetIPID++);
1375 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1378 /* already in network byte order */
1379 NetCopyIP((void *)&ip->ip_src, &source);
1380 /* already in network byte order */
1381 NetCopyIP((void *)&ip->ip_dst, &dest);
1384 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1387 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1390 * If the data is an odd number of bytes, zero the
1391 * byte after the last byte so that the checksum
1395 pkt[IP_UDP_HDR_SIZE + len] = 0;
1397 net_set_ip_header(pkt, dest, NetOurIP);
1398 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1399 ip->ip_p = IPPROTO_UDP;
1400 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1402 ip->udp_src = htons(sport);
1403 ip->udp_dst = htons(dport);
1404 ip->udp_len = htons(UDP_HDR_SIZE + len);
1408 void copy_filename(char *dst, const char *src, int size)
1410 if (*src && (*src == '"')) {
1415 while ((--size > 0) && *src && (*src != '"'))
1420 #if defined(CONFIG_CMD_NFS) || \
1421 defined(CONFIG_CMD_SNTP) || \
1422 defined(CONFIG_CMD_DNS)
1424 * make port a little random (1024-17407)
1425 * This keeps the math somewhat trivial to compute, and seems to work with
1426 * all supported protocols/clients/servers
1428 unsigned int random_port(void)
1430 return 1024 + (get_timer(0) % 0x4000);
1434 void ip_to_string(IPaddr_t x, char *s)
1437 sprintf(s, "%d.%d.%d.%d",
1438 (int) ((x >> 24) & 0xff),
1439 (int) ((x >> 16) & 0xff),
1440 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1444 void VLAN_to_string(ushort x, char *s)
1448 if (x == (ushort)-1)
1454 sprintf(s, "%d", x & VLAN_IDMASK);
1457 ushort string_to_VLAN(const char *s)
1462 return htons(VLAN_NONE);
1464 if (*s < '0' || *s > '9')
1467 id = (ushort)simple_strtoul(s, NULL, 10);
1472 ushort getenv_VLAN(char *var)
1474 return string_to_VLAN(getenv(var));