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 const char *s = getenv("autoload");
222 * Just use BOOTP/RARP to configure system;
223 * Do not use TFTP to load the bootfile.
225 net_set_state(NETLOOP_SUCCESS);
228 #if defined(CONFIG_CMD_NFS)
229 if (strcmp(s, "NFS") == 0) {
231 * Use NFS to load the bootfile.
241 static void NetInitLoop(void)
243 static int env_changed_id;
244 int env_id = get_env_id();
246 /* update only when the environment has changed */
247 if (env_changed_id != env_id) {
248 NetOurIP = getenv_IPaddr("ipaddr");
249 NetOurGatewayIP = getenv_IPaddr("gatewayip");
250 NetOurSubnetMask = getenv_IPaddr("netmask");
251 NetServerIP = getenv_IPaddr("serverip");
252 NetOurNativeVLAN = getenv_VLAN("nvlan");
253 NetOurVLAN = getenv_VLAN("vlan");
254 #if defined(CONFIG_CMD_DNS)
255 NetOurDNSIP = getenv_IPaddr("dnsip");
257 env_changed_id = env_id;
259 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
264 static void net_clear_handlers(void)
266 net_set_udp_handler(NULL);
267 net_set_arp_handler(NULL);
268 NetSetTimeout(0, NULL);
271 static void net_cleanup_loop(void)
273 net_clear_handlers();
278 static int first_call = 1;
282 * Setup packet buffers, aligned correctly.
286 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
287 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
288 for (i = 0; i < PKTBUFSRX; i++)
289 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
292 net_clear_handlers();
294 /* Only need to setup buffer pointers once. */
301 /**********************************************************************/
303 * Main network processing loop.
306 int NetLoop(enum proto_t protocol)
314 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
316 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
318 if (eth_is_on_demand_init() || protocol != NETCONS) {
321 if (eth_init(bd) < 0) {
326 eth_init_state_only(bd);
329 net_set_state(NETLOOP_CONTINUE);
332 * Start the ball rolling with the given start function. From
333 * here on, this code is a state machine driven by received
334 * packets and timer events.
336 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
339 switch (net_check_prereq(protocol)) {
341 /* network not configured */
346 /* network device not configured */
351 NetBootFileXferSize = 0;
354 #ifdef CONFIG_CMD_TFTPPUT
357 /* always use ARP to get server ethernet address */
360 #ifdef CONFIG_CMD_TFTPSRV
365 #if defined(CONFIG_CMD_DHCP)
369 DhcpRequest(); /* Basically same as BOOTP */
379 #if defined(CONFIG_CMD_RARP)
386 #if defined(CONFIG_CMD_PING)
391 #if defined(CONFIG_CMD_NFS)
396 #if defined(CONFIG_CMD_CDP)
401 #ifdef CONFIG_NETCONSOLE
406 #if defined(CONFIG_CMD_SNTP)
411 #if defined(CONFIG_CMD_DNS)
416 #if defined(CONFIG_CMD_LINK_LOCAL)
428 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
429 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
430 defined(CONFIG_STATUS_LED) && \
431 defined(STATUS_LED_RED)
433 * Echo the inverted link state to the fault LED.
435 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
436 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
438 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
439 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
440 #endif /* CONFIG_MII, ... */
443 * Main packet reception loop. Loop receiving packets until
444 * someone sets `net_state' to a state that terminates.
448 #ifdef CONFIG_SHOW_ACTIVITY
452 * Check the ethernet for a new packet. The ethernet
453 * receive routine will process it.
458 * Abort if ctrl-c was pressed.
461 /* cancel any ARP that may not have completed */
462 NetArpWaitPacketIP = 0;
466 /* Invalidate the last protocol */
467 eth_set_last_protocol(BOOTP);
470 /* include a debug print as well incase the debug
471 messages are directed to stderr */
472 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
479 * Check for a timeout, and run the timeout handler
482 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
485 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
486 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
487 defined(CONFIG_STATUS_LED) && \
488 defined(STATUS_LED_RED)
490 * Echo the inverted link state to the fault LED.
492 if (miiphy_link(eth_get_dev()->name,
493 CONFIG_SYS_FAULT_MII_ADDR)) {
494 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
496 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
498 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
499 #endif /* CONFIG_MII, ... */
500 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
502 timeHandler = (thand_f *)0;
509 case NETLOOP_RESTART:
513 case NETLOOP_SUCCESS:
515 if (NetBootFileXferSize > 0) {
517 printf("Bytes transferred = %ld (%lx hex)\n",
519 NetBootFileXferSize);
520 sprintf(buf, "%lX", NetBootFileXferSize);
521 setenv("filesize", buf);
523 sprintf(buf, "%lX", (unsigned long)load_addr);
524 setenv("fileaddr", buf);
526 if (protocol != NETCONS)
529 eth_halt_state_only();
531 eth_set_last_protocol(protocol);
533 ret = NetBootFileXferSize;
534 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
539 /* Invalidate the last protocol */
540 eth_set_last_protocol(BOOTP);
541 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
544 case NETLOOP_CONTINUE:
550 #ifdef CONFIG_CMD_TFTPPUT
551 /* Clear out the handlers */
552 net_set_udp_handler(NULL);
553 net_set_icmp_handler(NULL);
558 /**********************************************************************/
561 startAgainTimeout(void)
563 net_set_state(NETLOOP_RESTART);
566 void NetStartAgain(void)
569 int retry_forever = 0;
570 unsigned long retrycnt = 0;
572 nretry = getenv("netretry");
574 if (!strcmp(nretry, "yes"))
576 else if (!strcmp(nretry, "no"))
578 else if (!strcmp(nretry, "once"))
581 retrycnt = simple_strtoul(nretry, NULL, 0);
585 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
587 net_set_state(NETLOOP_FAIL);
594 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
595 eth_try_another(!NetRestarted);
598 if (NetRestartWrap) {
601 NetSetTimeout(10000UL, startAgainTimeout);
602 net_set_udp_handler(NULL);
604 net_set_state(NETLOOP_FAIL);
607 net_set_state(NETLOOP_RESTART);
611 /**********************************************************************/
616 static void dummy_handler(uchar *pkt, unsigned dport,
617 IPaddr_t sip, unsigned sport,
622 rxhand_f *net_get_udp_handler(void)
624 return udp_packet_handler;
627 void net_set_udp_handler(rxhand_f *f)
629 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
631 udp_packet_handler = dummy_handler;
633 udp_packet_handler = f;
636 rxhand_f *net_get_arp_handler(void)
638 return arp_packet_handler;
641 void net_set_arp_handler(rxhand_f *f)
643 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
645 arp_packet_handler = dummy_handler;
647 arp_packet_handler = f;
650 #ifdef CONFIG_CMD_TFTPPUT
651 void net_set_icmp_handler(rxhand_icmp_f *f)
653 packet_icmp_handler = f;
658 NetSetTimeout(ulong iv, thand_f *f)
661 debug_cond(DEBUG_INT_STATE,
662 "--- NetLoop timeout handler cancelled\n");
663 timeHandler = (thand_f *)0;
665 debug_cond(DEBUG_INT_STATE,
666 "--- NetLoop timeout handler set (%p)\n", f);
668 timeStart = get_timer(0);
669 timeDelta = iv * CONFIG_SYS_HZ / 1000;
673 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
680 /* make sure the NetTxPacket is initialized (NetInit() was called) */
681 assert(NetTxPacket != NULL);
682 if (NetTxPacket == NULL)
685 /* convert to new style broadcast */
689 /* if broadcast, make the ether address a broadcast and don't do ARP */
690 if (dest == 0xFFFFFFFF)
691 ether = NetBcastAddr;
693 pkt = (uchar *)NetTxPacket;
695 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
697 net_set_udp_header(pkt, dest, dport, sport, payload_len);
698 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
700 /* if MAC address was not discovered yet, do an ARP request */
701 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
702 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
704 /* save the ip and eth addr for the packet to send after arp */
705 NetArpWaitPacketIP = dest;
706 NetArpWaitPacketMAC = ether;
708 /* size of the waiting packet */
709 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
711 /* and do the ARP request */
713 NetArpWaitTimerStart = get_timer(0);
715 return 1; /* waiting */
717 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
719 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
720 return 0; /* transmitted */
724 #ifdef CONFIG_IP_DEFRAG
726 * This function collects fragments in a single packet, according
727 * to the algorithm in RFC815. It returns NULL or the pointer to
728 * a complete packet, in static storage
730 #ifndef CONFIG_NET_MAXDEFRAG
731 #define CONFIG_NET_MAXDEFRAG 16384
734 * MAXDEFRAG, above, is chosen in the config file and is real data
735 * so we need to add the NFS overhead, which is more than TFTP.
736 * To use sizeof in the internal unnamed structures, we need a real
737 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
738 * The compiler doesn't complain nor allocates the actual structure
740 static struct rpc_t rpc_specimen;
741 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
743 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
746 * this is the packet being assembled, either data or frag control.
747 * Fragments go by 8 bytes, so this union must be 8 bytes long
750 /* first_byte is address of this structure */
751 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
752 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
753 u16 prev_hole; /* index of prev, 0 == none */
757 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
759 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
760 static u16 first_hole, total_len;
761 struct hole *payload, *thisfrag, *h, *newh;
762 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
763 uchar *indata = (uchar *)ip;
764 int offset8, start, len, done = 0;
765 u16 ip_off = ntohs(ip->ip_off);
767 /* payload starts after IP header, this fragment is in there */
768 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
769 offset8 = (ip_off & IP_OFFS);
770 thisfrag = payload + offset8;
772 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
774 if (start + len > IP_MAXUDP) /* fragment extends too far */
777 if (!total_len || localip->ip_id != ip->ip_id) {
778 /* new (or different) packet, reset structs */
780 payload[0].last_byte = ~0;
781 payload[0].next_hole = 0;
782 payload[0].prev_hole = 0;
784 /* any IP header will work, copy the first we received */
785 memcpy(localip, ip, IP_HDR_SIZE);
789 * What follows is the reassembly algorithm. We use the payload
790 * array as a linked list of hole descriptors, as each hole starts
791 * at a multiple of 8 bytes. However, last byte can be whatever value,
792 * so it is represented as byte count, not as 8-byte blocks.
795 h = payload + first_hole;
796 while (h->last_byte < start) {
798 /* no hole that far away */
801 h = payload + h->next_hole;
804 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
805 if (offset8 + ((len + 7) / 8) <= h - payload) {
806 /* no overlap with holes (dup fragment?) */
810 if (!(ip_off & IP_FLAGS_MFRAG)) {
811 /* no more fragmentss: truncate this (last) hole */
812 total_len = start + len;
813 h->last_byte = start + len;
817 * There is some overlap: fix the hole list. This code doesn't
818 * deal with a fragment that overlaps with two different holes
819 * (thus being a superset of a previously-received fragment).
822 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
823 /* complete overlap with hole: remove hole */
824 if (!h->prev_hole && !h->next_hole) {
825 /* last remaining hole */
827 } else if (!h->prev_hole) {
829 first_hole = h->next_hole;
830 payload[h->next_hole].prev_hole = 0;
831 } else if (!h->next_hole) {
833 payload[h->prev_hole].next_hole = 0;
835 /* in the middle of the list */
836 payload[h->next_hole].prev_hole = h->prev_hole;
837 payload[h->prev_hole].next_hole = h->next_hole;
840 } else if (h->last_byte <= start + len) {
841 /* overlaps with final part of the hole: shorten this hole */
842 h->last_byte = start;
844 } else if (h >= thisfrag) {
845 /* overlaps with initial part of the hole: move this hole */
846 newh = thisfrag + (len / 8);
850 payload[h->next_hole].prev_hole = (h - payload);
852 payload[h->prev_hole].next_hole = (h - payload);
854 first_hole = (h - payload);
857 /* fragment sits in the middle: split the hole */
858 newh = thisfrag + (len / 8);
860 h->last_byte = start;
861 h->next_hole = (newh - payload);
862 newh->prev_hole = (h - payload);
864 payload[newh->next_hole].prev_hole = (newh - payload);
867 /* finally copy this fragment and possibly return whole packet */
868 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
872 localip->ip_len = htons(total_len);
873 *lenp = total_len + IP_HDR_SIZE;
877 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
879 u16 ip_off = ntohs(ip->ip_off);
880 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
881 return ip; /* not a fragment */
882 return __NetDefragment(ip, lenp);
885 #else /* !CONFIG_IP_DEFRAG */
887 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
889 u16 ip_off = ntohs(ip->ip_off);
890 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
891 return ip; /* not a fragment */
897 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
900 * @parma ip IP packet containing the ICMP
902 static void receive_icmp(struct ip_udp_hdr *ip, int len,
903 IPaddr_t src_ip, struct ethernet_hdr *et)
905 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
907 switch (icmph->type) {
909 if (icmph->code != ICMP_REDIR_HOST)
911 printf(" ICMP Host Redirect to %pI4 ",
915 #if defined(CONFIG_CMD_PING)
916 ping_receive(et, ip, len);
918 #ifdef CONFIG_CMD_TFTPPUT
919 if (packet_icmp_handler)
920 packet_icmp_handler(icmph->type, icmph->code,
921 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
922 icmph->un.data, ntohs(ip->udp_len));
929 NetReceive(uchar *inpkt, int len)
931 struct ethernet_hdr *et;
932 struct ip_udp_hdr *ip;
936 #if defined(CONFIG_CMD_CDP)
939 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
941 debug_cond(DEBUG_NET_PKT, "packet received\n");
944 NetRxPacketLen = len;
945 et = (struct ethernet_hdr *)inpkt;
947 /* too small packet? */
948 if (len < ETHER_HDR_SIZE)
953 (*push_packet)(inpkt, len);
958 #if defined(CONFIG_CMD_CDP)
959 /* keep track if packet is CDP */
960 iscdp = is_cdp_packet(et->et_dest);
963 myvlanid = ntohs(NetOurVLAN);
964 if (myvlanid == (ushort)-1)
965 myvlanid = VLAN_NONE;
966 mynvlanid = ntohs(NetOurNativeVLAN);
967 if (mynvlanid == (ushort)-1)
968 mynvlanid = VLAN_NONE;
970 eth_proto = ntohs(et->et_protlen);
972 if (eth_proto < 1514) {
973 struct e802_hdr *et802 = (struct e802_hdr *)et;
975 * Got a 802.2 packet. Check the other protocol field.
976 * XXX VLAN over 802.2+SNAP not implemented!
978 eth_proto = ntohs(et802->et_prot);
980 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
981 len -= E802_HDR_SIZE;
983 } else if (eth_proto != PROT_VLAN) { /* normal packet */
984 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
985 len -= ETHER_HDR_SIZE;
987 } else { /* VLAN packet */
988 struct vlan_ethernet_hdr *vet =
989 (struct vlan_ethernet_hdr *)et;
991 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
993 /* too small packet? */
994 if (len < VLAN_ETHER_HDR_SIZE)
997 /* if no VLAN active */
998 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
999 #if defined(CONFIG_CMD_CDP)
1005 cti = ntohs(vet->vet_tag);
1006 vlanid = cti & VLAN_IDMASK;
1007 eth_proto = ntohs(vet->vet_type);
1009 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1010 len -= VLAN_ETHER_HDR_SIZE;
1013 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1015 #if defined(CONFIG_CMD_CDP)
1017 cdp_receive((uchar *)ip, len);
1022 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1023 if (vlanid == VLAN_NONE)
1024 vlanid = (mynvlanid & VLAN_IDMASK);
1026 if (vlanid != (myvlanid & VLAN_IDMASK))
1030 switch (eth_proto) {
1033 ArpReceive(et, ip, len);
1036 #ifdef CONFIG_CMD_RARP
1038 rarp_receive(ip, len);
1042 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1043 /* Before we start poking the header, make sure it is there */
1044 if (len < IP_UDP_HDR_SIZE) {
1045 debug("len bad %d < %lu\n", len,
1046 (ulong)IP_UDP_HDR_SIZE);
1049 /* Check the packet length */
1050 if (len < ntohs(ip->ip_len)) {
1051 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1054 len = ntohs(ip->ip_len);
1055 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1056 len, ip->ip_hl_v & 0xff);
1058 /* Can't deal with anything except IPv4 */
1059 if ((ip->ip_hl_v & 0xf0) != 0x40)
1061 /* Can't deal with IP options (headers != 20 bytes) */
1062 if ((ip->ip_hl_v & 0x0f) > 0x05)
1064 /* Check the Checksum of the header */
1065 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1066 debug("checksum bad\n");
1069 /* If it is not for us, ignore it */
1070 dst_ip = NetReadIP(&ip->ip_dst);
1071 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1072 #ifdef CONFIG_MCAST_TFTP
1073 if (Mcast_addr != dst_ip)
1077 /* Read source IP address for later use */
1078 src_ip = NetReadIP(&ip->ip_src);
1080 * The function returns the unchanged packet if it's not
1081 * a fragment, and either the complete packet or NULL if
1082 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1084 ip = NetDefragment(ip, &len);
1088 * watch for ICMP host redirects
1090 * There is no real handler code (yet). We just watch
1091 * for ICMP host redirect messages. In case anybody
1092 * sees these messages: please contact me
1093 * (wd@denx.de), or - even better - send me the
1094 * necessary fixes :-)
1096 * Note: in all cases where I have seen this so far
1097 * it was a problem with the router configuration,
1098 * for instance when a router was configured in the
1099 * BOOTP reply, but the TFTP server was on the same
1100 * subnet. So this is probably a warning that your
1101 * configuration might be wrong. But I'm not really
1102 * sure if there aren't any other situations.
1104 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1105 * we send a tftp packet to a dead connection, or when
1106 * there is no server at the other end.
1108 if (ip->ip_p == IPPROTO_ICMP) {
1109 receive_icmp(ip, len, src_ip, et);
1111 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1115 debug_cond(DEBUG_DEV_PKT,
1116 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1117 &dst_ip, &src_ip, len);
1119 #ifdef CONFIG_UDP_CHECKSUM
1120 if (ip->udp_xsum != 0) {
1126 xsum += (ntohs(ip->udp_len));
1127 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1128 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1129 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1130 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1132 sumlen = ntohs(ip->udp_len);
1133 sumptr = (ushort *) &(ip->udp_src);
1135 while (sumlen > 1) {
1138 sumdata = *sumptr++;
1139 xsum += ntohs(sumdata);
1145 sumdata = *(unsigned char *) sumptr;
1146 sumdata = (sumdata << 8) & 0xff00;
1149 while ((xsum >> 16) != 0) {
1150 xsum = (xsum & 0x0000ffff) +
1151 ((xsum >> 16) & 0x0000ffff);
1153 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1154 printf(" UDP wrong checksum %08lx %08x\n",
1155 xsum, ntohs(ip->udp_xsum));
1162 #ifdef CONFIG_NETCONSOLE
1163 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1167 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1170 * IP header OK. Pass the packet to the current handler.
1172 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1176 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1182 /**********************************************************************/
1184 static int net_check_prereq(enum proto_t protocol)
1188 #if defined(CONFIG_CMD_PING)
1190 if (NetPingIP == 0) {
1191 puts("*** ERROR: ping address not given\n");
1196 #if defined(CONFIG_CMD_SNTP)
1198 if (NetNtpServerIP == 0) {
1199 puts("*** ERROR: NTP server address not given\n");
1204 #if defined(CONFIG_CMD_DNS)
1206 if (NetOurDNSIP == 0) {
1207 puts("*** ERROR: DNS server address not given\n");
1212 #if defined(CONFIG_CMD_NFS)
1217 if (NetServerIP == 0) {
1218 puts("*** ERROR: `serverip' not set\n");
1221 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1222 defined(CONFIG_CMD_DNS)
1229 if (NetOurIP == 0) {
1230 puts("*** ERROR: `ipaddr' not set\n");
1235 #ifdef CONFIG_CMD_RARP
1242 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1243 int num = eth_get_dev_index();
1247 puts("*** ERROR: No ethernet found.\n");
1250 puts("*** ERROR: `ethaddr' not set\n");
1253 printf("*** ERROR: `eth%daddr' not set\n",
1267 /**********************************************************************/
1270 NetCksumOk(uchar *ptr, int len)
1272 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1277 NetCksum(uchar *ptr, int len)
1280 ushort *p = (ushort *)ptr;
1285 xsum = (xsum & 0xffff) + (xsum >> 16);
1286 xsum = (xsum & 0xffff) + (xsum >> 16);
1287 return xsum & 0xffff;
1295 myvlanid = ntohs(NetOurVLAN);
1296 if (myvlanid == (ushort)-1)
1297 myvlanid = VLAN_NONE;
1299 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1300 VLAN_ETHER_HDR_SIZE;
1304 NetSetEther(uchar *xet, uchar * addr, uint prot)
1306 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1309 myvlanid = ntohs(NetOurVLAN);
1310 if (myvlanid == (ushort)-1)
1311 myvlanid = VLAN_NONE;
1313 memcpy(et->et_dest, addr, 6);
1314 memcpy(et->et_src, NetOurEther, 6);
1315 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1316 et->et_protlen = htons(prot);
1317 return ETHER_HDR_SIZE;
1319 struct vlan_ethernet_hdr *vet =
1320 (struct vlan_ethernet_hdr *)xet;
1322 vet->vet_vlan_type = htons(PROT_VLAN);
1323 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1324 vet->vet_type = htons(prot);
1325 return VLAN_ETHER_HDR_SIZE;
1329 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1333 memcpy(et->et_dest, addr, 6);
1334 memcpy(et->et_src, NetOurEther, 6);
1335 protlen = ntohs(et->et_protlen);
1336 if (protlen == PROT_VLAN) {
1337 struct vlan_ethernet_hdr *vet =
1338 (struct vlan_ethernet_hdr *)et;
1339 vet->vet_type = htons(prot);
1340 return VLAN_ETHER_HDR_SIZE;
1341 } else if (protlen > 1514) {
1342 et->et_protlen = htons(prot);
1343 return ETHER_HDR_SIZE;
1346 struct e802_hdr *et802 = (struct e802_hdr *)et;
1347 et802->et_prot = htons(prot);
1348 return E802_HDR_SIZE;
1352 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1354 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1357 * Construct an IP header.
1359 /* IP_HDR_SIZE / 4 (not including UDP) */
1362 ip->ip_len = htons(IP_HDR_SIZE);
1363 ip->ip_id = htons(NetIPID++);
1364 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1367 /* already in network byte order */
1368 NetCopyIP((void *)&ip->ip_src, &source);
1369 /* already in network byte order */
1370 NetCopyIP((void *)&ip->ip_dst, &dest);
1373 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1376 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1379 * If the data is an odd number of bytes, zero the
1380 * byte after the last byte so that the checksum
1384 pkt[IP_UDP_HDR_SIZE + len] = 0;
1386 net_set_ip_header(pkt, dest, NetOurIP);
1387 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1388 ip->ip_p = IPPROTO_UDP;
1389 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1391 ip->udp_src = htons(sport);
1392 ip->udp_dst = htons(dport);
1393 ip->udp_len = htons(UDP_HDR_SIZE + len);
1397 void copy_filename(char *dst, const char *src, int size)
1399 if (*src && (*src == '"')) {
1404 while ((--size > 0) && *src && (*src != '"'))
1409 #if defined(CONFIG_CMD_NFS) || \
1410 defined(CONFIG_CMD_SNTP) || \
1411 defined(CONFIG_CMD_DNS)
1413 * make port a little random (1024-17407)
1414 * This keeps the math somewhat trivial to compute, and seems to work with
1415 * all supported protocols/clients/servers
1417 unsigned int random_port(void)
1419 return 1024 + (get_timer(0) % 0x4000);
1423 void ip_to_string(IPaddr_t x, char *s)
1426 sprintf(s, "%d.%d.%d.%d",
1427 (int) ((x >> 24) & 0xff),
1428 (int) ((x >> 16) & 0xff),
1429 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1433 void VLAN_to_string(ushort x, char *s)
1437 if (x == (ushort)-1)
1443 sprintf(s, "%d", x & VLAN_IDMASK);
1446 ushort string_to_VLAN(const char *s)
1451 return htons(VLAN_NONE);
1453 if (*s < '0' || *s > '9')
1456 id = (ushort)simple_strtoul(s, NULL, 10);
1461 ushort getenv_VLAN(char *var)
1463 return string_to_VLAN(getenv(var));