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 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");
320 if (eth_init(bd) < 0) {
326 net_set_state(NETLOOP_CONTINUE);
329 * Start the ball rolling with the given start function. From
330 * here on, this code is a state machine driven by received
331 * packets and timer events.
333 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
336 switch (net_check_prereq(protocol)) {
338 /* network not configured */
343 /* network device not configured */
348 NetBootFileXferSize = 0;
351 #ifdef CONFIG_CMD_TFTPPUT
354 /* always use ARP to get server ethernet address */
357 #ifdef CONFIG_CMD_TFTPSRV
362 #if defined(CONFIG_CMD_DHCP)
366 DhcpRequest(); /* Basically same as BOOTP */
376 #if defined(CONFIG_CMD_RARP)
383 #if defined(CONFIG_CMD_PING)
388 #if defined(CONFIG_CMD_NFS)
393 #if defined(CONFIG_CMD_CDP)
398 #ifdef CONFIG_NETCONSOLE
403 #if defined(CONFIG_CMD_SNTP)
408 #if defined(CONFIG_CMD_DNS)
413 #if defined(CONFIG_CMD_LINK_LOCAL)
425 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
426 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
427 defined(CONFIG_STATUS_LED) && \
428 defined(STATUS_LED_RED)
430 * Echo the inverted link state to the fault LED.
432 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
433 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
435 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
436 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
437 #endif /* CONFIG_MII, ... */
440 * Main packet reception loop. Loop receiving packets until
441 * someone sets `net_state' to a state that terminates.
445 #ifdef CONFIG_SHOW_ACTIVITY
449 * Check the ethernet for a new packet. The ethernet
450 * receive routine will process it.
455 * Abort if ctrl-c was pressed.
458 /* cancel any ARP that may not have completed */
459 NetArpWaitPacketIP = 0;
464 /* include a debug print as well incase the debug
465 messages are directed to stderr */
466 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
473 * Check for a timeout, and run the timeout handler
476 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
479 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
480 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
481 defined(CONFIG_STATUS_LED) && \
482 defined(STATUS_LED_RED)
484 * Echo the inverted link state to the fault LED.
486 if (miiphy_link(eth_get_dev()->name,
487 CONFIG_SYS_FAULT_MII_ADDR)) {
488 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
490 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
492 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
493 #endif /* CONFIG_MII, ... */
494 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
496 timeHandler = (thand_f *)0;
503 case NETLOOP_RESTART:
507 case NETLOOP_SUCCESS:
509 if (NetBootFileXferSize > 0) {
511 printf("Bytes transferred = %ld (%lx hex)\n",
513 NetBootFileXferSize);
514 sprintf(buf, "%lX", NetBootFileXferSize);
515 setenv("filesize", buf);
517 sprintf(buf, "%lX", (unsigned long)load_addr);
518 setenv("fileaddr", buf);
521 ret = NetBootFileXferSize;
522 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
527 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
530 case NETLOOP_CONTINUE:
536 #ifdef CONFIG_CMD_TFTPPUT
537 /* Clear out the handlers */
538 net_set_udp_handler(NULL);
539 net_set_icmp_handler(NULL);
544 /**********************************************************************/
547 startAgainTimeout(void)
549 net_set_state(NETLOOP_RESTART);
552 void NetStartAgain(void)
555 int retry_forever = 0;
556 unsigned long retrycnt = 0;
558 nretry = getenv("netretry");
560 if (!strcmp(nretry, "yes"))
562 else if (!strcmp(nretry, "no"))
564 else if (!strcmp(nretry, "once"))
567 retrycnt = simple_strtoul(nretry, NULL, 0);
571 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
573 net_set_state(NETLOOP_FAIL);
580 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
581 eth_try_another(!NetRestarted);
584 if (NetRestartWrap) {
587 NetSetTimeout(10000UL, startAgainTimeout);
588 net_set_udp_handler(NULL);
590 net_set_state(NETLOOP_FAIL);
593 net_set_state(NETLOOP_RESTART);
597 /**********************************************************************/
602 static void dummy_handler(uchar *pkt, unsigned dport,
603 IPaddr_t sip, unsigned sport,
608 rxhand_f *net_get_udp_handler(void)
610 return udp_packet_handler;
613 void net_set_udp_handler(rxhand_f *f)
615 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
617 udp_packet_handler = dummy_handler;
619 udp_packet_handler = f;
622 rxhand_f *net_get_arp_handler(void)
624 return arp_packet_handler;
627 void net_set_arp_handler(rxhand_f *f)
629 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
631 arp_packet_handler = dummy_handler;
633 arp_packet_handler = f;
636 #ifdef CONFIG_CMD_TFTPPUT
637 void net_set_icmp_handler(rxhand_icmp_f *f)
639 packet_icmp_handler = f;
644 NetSetTimeout(ulong iv, thand_f *f)
647 debug_cond(DEBUG_INT_STATE,
648 "--- NetLoop timeout handler cancelled\n");
649 timeHandler = (thand_f *)0;
651 debug_cond(DEBUG_INT_STATE,
652 "--- NetLoop timeout handler set (%p)\n", f);
654 timeStart = get_timer(0);
659 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
666 /* make sure the NetTxPacket is initialized (NetInit() was called) */
667 assert(NetTxPacket != NULL);
668 if (NetTxPacket == NULL)
671 /* convert to new style broadcast */
675 /* if broadcast, make the ether address a broadcast and don't do ARP */
676 if (dest == 0xFFFFFFFF)
677 ether = NetBcastAddr;
679 pkt = (uchar *)NetTxPacket;
681 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
683 net_set_udp_header(pkt, dest, dport, sport, payload_len);
684 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
686 /* if MAC address was not discovered yet, do an ARP request */
687 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
688 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
690 /* save the ip and eth addr for the packet to send after arp */
691 NetArpWaitPacketIP = dest;
692 NetArpWaitPacketMAC = ether;
694 /* size of the waiting packet */
695 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
697 /* and do the ARP request */
699 NetArpWaitTimerStart = get_timer(0);
701 return 1; /* waiting */
703 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
705 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
706 return 0; /* transmitted */
710 #ifdef CONFIG_IP_DEFRAG
712 * This function collects fragments in a single packet, according
713 * to the algorithm in RFC815. It returns NULL or the pointer to
714 * a complete packet, in static storage
716 #ifndef CONFIG_NET_MAXDEFRAG
717 #define CONFIG_NET_MAXDEFRAG 16384
720 * MAXDEFRAG, above, is chosen in the config file and is real data
721 * so we need to add the NFS overhead, which is more than TFTP.
722 * To use sizeof in the internal unnamed structures, we need a real
723 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
724 * The compiler doesn't complain nor allocates the actual structure
726 static struct rpc_t rpc_specimen;
727 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
729 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
732 * this is the packet being assembled, either data or frag control.
733 * Fragments go by 8 bytes, so this union must be 8 bytes long
736 /* first_byte is address of this structure */
737 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
738 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
739 u16 prev_hole; /* index of prev, 0 == none */
743 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
745 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
746 static u16 first_hole, total_len;
747 struct hole *payload, *thisfrag, *h, *newh;
748 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
749 uchar *indata = (uchar *)ip;
750 int offset8, start, len, done = 0;
751 u16 ip_off = ntohs(ip->ip_off);
753 /* payload starts after IP header, this fragment is in there */
754 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
755 offset8 = (ip_off & IP_OFFS);
756 thisfrag = payload + offset8;
758 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
760 if (start + len > IP_MAXUDP) /* fragment extends too far */
763 if (!total_len || localip->ip_id != ip->ip_id) {
764 /* new (or different) packet, reset structs */
766 payload[0].last_byte = ~0;
767 payload[0].next_hole = 0;
768 payload[0].prev_hole = 0;
770 /* any IP header will work, copy the first we received */
771 memcpy(localip, ip, IP_HDR_SIZE);
775 * What follows is the reassembly algorithm. We use the payload
776 * array as a linked list of hole descriptors, as each hole starts
777 * at a multiple of 8 bytes. However, last byte can be whatever value,
778 * so it is represented as byte count, not as 8-byte blocks.
781 h = payload + first_hole;
782 while (h->last_byte < start) {
784 /* no hole that far away */
787 h = payload + h->next_hole;
790 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
791 if (offset8 + ((len + 7) / 8) <= h - payload) {
792 /* no overlap with holes (dup fragment?) */
796 if (!(ip_off & IP_FLAGS_MFRAG)) {
797 /* no more fragmentss: truncate this (last) hole */
798 total_len = start + len;
799 h->last_byte = start + len;
803 * There is some overlap: fix the hole list. This code doesn't
804 * deal with a fragment that overlaps with two different holes
805 * (thus being a superset of a previously-received fragment).
808 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
809 /* complete overlap with hole: remove hole */
810 if (!h->prev_hole && !h->next_hole) {
811 /* last remaining hole */
813 } else if (!h->prev_hole) {
815 first_hole = h->next_hole;
816 payload[h->next_hole].prev_hole = 0;
817 } else if (!h->next_hole) {
819 payload[h->prev_hole].next_hole = 0;
821 /* in the middle of the list */
822 payload[h->next_hole].prev_hole = h->prev_hole;
823 payload[h->prev_hole].next_hole = h->next_hole;
826 } else if (h->last_byte <= start + len) {
827 /* overlaps with final part of the hole: shorten this hole */
828 h->last_byte = start;
830 } else if (h >= thisfrag) {
831 /* overlaps with initial part of the hole: move this hole */
832 newh = thisfrag + (len / 8);
836 payload[h->next_hole].prev_hole = (h - payload);
838 payload[h->prev_hole].next_hole = (h - payload);
840 first_hole = (h - payload);
843 /* fragment sits in the middle: split the hole */
844 newh = thisfrag + (len / 8);
846 h->last_byte = start;
847 h->next_hole = (newh - payload);
848 newh->prev_hole = (h - payload);
850 payload[newh->next_hole].prev_hole = (newh - payload);
853 /* finally copy this fragment and possibly return whole packet */
854 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
858 localip->ip_len = htons(total_len);
859 *lenp = total_len + IP_HDR_SIZE;
863 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
865 u16 ip_off = ntohs(ip->ip_off);
866 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
867 return ip; /* not a fragment */
868 return __NetDefragment(ip, lenp);
871 #else /* !CONFIG_IP_DEFRAG */
873 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
875 u16 ip_off = ntohs(ip->ip_off);
876 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
877 return ip; /* not a fragment */
883 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
886 * @parma ip IP packet containing the ICMP
888 static void receive_icmp(struct ip_udp_hdr *ip, int len,
889 IPaddr_t src_ip, struct ethernet_hdr *et)
891 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
893 switch (icmph->type) {
895 if (icmph->code != ICMP_REDIR_HOST)
897 printf(" ICMP Host Redirect to %pI4 ",
901 #if defined(CONFIG_CMD_PING)
902 ping_receive(et, ip, len);
904 #ifdef CONFIG_CMD_TFTPPUT
905 if (packet_icmp_handler)
906 packet_icmp_handler(icmph->type, icmph->code,
907 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
908 icmph->un.data, ntohs(ip->udp_len));
915 NetReceive(uchar *inpkt, int len)
917 struct ethernet_hdr *et;
918 struct ip_udp_hdr *ip;
922 #if defined(CONFIG_CMD_CDP)
925 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
927 debug_cond(DEBUG_NET_PKT, "packet received\n");
930 NetRxPacketLen = len;
931 et = (struct ethernet_hdr *)inpkt;
933 /* too small packet? */
934 if (len < ETHER_HDR_SIZE)
939 (*push_packet)(inpkt, len);
944 #if defined(CONFIG_CMD_CDP)
945 /* keep track if packet is CDP */
946 iscdp = is_cdp_packet(et->et_dest);
949 myvlanid = ntohs(NetOurVLAN);
950 if (myvlanid == (ushort)-1)
951 myvlanid = VLAN_NONE;
952 mynvlanid = ntohs(NetOurNativeVLAN);
953 if (mynvlanid == (ushort)-1)
954 mynvlanid = VLAN_NONE;
956 eth_proto = ntohs(et->et_protlen);
958 if (eth_proto < 1514) {
959 struct e802_hdr *et802 = (struct e802_hdr *)et;
961 * Got a 802.2 packet. Check the other protocol field.
962 * XXX VLAN over 802.2+SNAP not implemented!
964 eth_proto = ntohs(et802->et_prot);
966 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
967 len -= E802_HDR_SIZE;
969 } else if (eth_proto != PROT_VLAN) { /* normal packet */
970 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
971 len -= ETHER_HDR_SIZE;
973 } else { /* VLAN packet */
974 struct vlan_ethernet_hdr *vet =
975 (struct vlan_ethernet_hdr *)et;
977 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
979 /* too small packet? */
980 if (len < VLAN_ETHER_HDR_SIZE)
983 /* if no VLAN active */
984 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
985 #if defined(CONFIG_CMD_CDP)
991 cti = ntohs(vet->vet_tag);
992 vlanid = cti & VLAN_IDMASK;
993 eth_proto = ntohs(vet->vet_type);
995 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
996 len -= VLAN_ETHER_HDR_SIZE;
999 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1001 #if defined(CONFIG_CMD_CDP)
1003 cdp_receive((uchar *)ip, len);
1008 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1009 if (vlanid == VLAN_NONE)
1010 vlanid = (mynvlanid & VLAN_IDMASK);
1012 if (vlanid != (myvlanid & VLAN_IDMASK))
1016 switch (eth_proto) {
1019 ArpReceive(et, ip, len);
1022 #ifdef CONFIG_CMD_RARP
1024 rarp_receive(ip, len);
1028 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1029 /* Before we start poking the header, make sure it is there */
1030 if (len < IP_UDP_HDR_SIZE) {
1031 debug("len bad %d < %lu\n", len,
1032 (ulong)IP_UDP_HDR_SIZE);
1035 /* Check the packet length */
1036 if (len < ntohs(ip->ip_len)) {
1037 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1040 len = ntohs(ip->ip_len);
1041 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1042 len, ip->ip_hl_v & 0xff);
1044 /* Can't deal with anything except IPv4 */
1045 if ((ip->ip_hl_v & 0xf0) != 0x40)
1047 /* Can't deal with IP options (headers != 20 bytes) */
1048 if ((ip->ip_hl_v & 0x0f) > 0x05)
1050 /* Check the Checksum of the header */
1051 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1052 debug("checksum bad\n");
1055 /* If it is not for us, ignore it */
1056 dst_ip = NetReadIP(&ip->ip_dst);
1057 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1058 #ifdef CONFIG_MCAST_TFTP
1059 if (Mcast_addr != dst_ip)
1063 /* Read source IP address for later use */
1064 src_ip = NetReadIP(&ip->ip_src);
1066 * The function returns the unchanged packet if it's not
1067 * a fragment, and either the complete packet or NULL if
1068 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1070 ip = NetDefragment(ip, &len);
1074 * watch for ICMP host redirects
1076 * There is no real handler code (yet). We just watch
1077 * for ICMP host redirect messages. In case anybody
1078 * sees these messages: please contact me
1079 * (wd@denx.de), or - even better - send me the
1080 * necessary fixes :-)
1082 * Note: in all cases where I have seen this so far
1083 * it was a problem with the router configuration,
1084 * for instance when a router was configured in the
1085 * BOOTP reply, but the TFTP server was on the same
1086 * subnet. So this is probably a warning that your
1087 * configuration might be wrong. But I'm not really
1088 * sure if there aren't any other situations.
1090 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1091 * we send a tftp packet to a dead connection, or when
1092 * there is no server at the other end.
1094 if (ip->ip_p == IPPROTO_ICMP) {
1095 receive_icmp(ip, len, src_ip, et);
1097 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1101 debug_cond(DEBUG_DEV_PKT,
1102 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1103 &dst_ip, &src_ip, len);
1105 #ifdef CONFIG_UDP_CHECKSUM
1106 if (ip->udp_xsum != 0) {
1112 xsum += (ntohs(ip->udp_len));
1113 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1114 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1115 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1116 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1118 sumlen = ntohs(ip->udp_len);
1119 sumptr = (ushort *) &(ip->udp_src);
1121 while (sumlen > 1) {
1124 sumdata = *sumptr++;
1125 xsum += ntohs(sumdata);
1131 sumdata = *(unsigned char *) sumptr;
1132 sumdata = (sumdata << 8) & 0xff00;
1135 while ((xsum >> 16) != 0) {
1136 xsum = (xsum & 0x0000ffff) +
1137 ((xsum >> 16) & 0x0000ffff);
1139 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1140 printf(" UDP wrong checksum %08lx %08x\n",
1141 xsum, ntohs(ip->udp_xsum));
1148 #ifdef CONFIG_NETCONSOLE
1149 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1152 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1155 * IP header OK. Pass the packet to the current handler.
1157 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1161 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1167 /**********************************************************************/
1169 static int net_check_prereq(enum proto_t protocol)
1173 #if defined(CONFIG_CMD_PING)
1175 if (NetPingIP == 0) {
1176 puts("*** ERROR: ping address not given\n");
1181 #if defined(CONFIG_CMD_SNTP)
1183 if (NetNtpServerIP == 0) {
1184 puts("*** ERROR: NTP server address not given\n");
1189 #if defined(CONFIG_CMD_DNS)
1191 if (NetOurDNSIP == 0) {
1192 puts("*** ERROR: DNS server address not given\n");
1197 #if defined(CONFIG_CMD_NFS)
1202 if (NetServerIP == 0) {
1203 puts("*** ERROR: `serverip' not set\n");
1206 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1207 defined(CONFIG_CMD_DNS)
1214 if (NetOurIP == 0) {
1215 puts("*** ERROR: `ipaddr' not set\n");
1220 #ifdef CONFIG_CMD_RARP
1227 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1228 int num = eth_get_dev_index();
1232 puts("*** ERROR: No ethernet found.\n");
1235 puts("*** ERROR: `ethaddr' not set\n");
1238 printf("*** ERROR: `eth%daddr' not set\n",
1252 /**********************************************************************/
1255 NetCksumOk(uchar *ptr, int len)
1257 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1262 NetCksum(uchar *ptr, int len)
1265 ushort *p = (ushort *)ptr;
1270 xsum = (xsum & 0xffff) + (xsum >> 16);
1271 xsum = (xsum & 0xffff) + (xsum >> 16);
1272 return xsum & 0xffff;
1280 myvlanid = ntohs(NetOurVLAN);
1281 if (myvlanid == (ushort)-1)
1282 myvlanid = VLAN_NONE;
1284 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1285 VLAN_ETHER_HDR_SIZE;
1289 NetSetEther(uchar *xet, uchar * addr, uint prot)
1291 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1294 myvlanid = ntohs(NetOurVLAN);
1295 if (myvlanid == (ushort)-1)
1296 myvlanid = VLAN_NONE;
1298 memcpy(et->et_dest, addr, 6);
1299 memcpy(et->et_src, NetOurEther, 6);
1300 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1301 et->et_protlen = htons(prot);
1302 return ETHER_HDR_SIZE;
1304 struct vlan_ethernet_hdr *vet =
1305 (struct vlan_ethernet_hdr *)xet;
1307 vet->vet_vlan_type = htons(PROT_VLAN);
1308 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1309 vet->vet_type = htons(prot);
1310 return VLAN_ETHER_HDR_SIZE;
1314 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1318 memcpy(et->et_dest, addr, 6);
1319 memcpy(et->et_src, NetOurEther, 6);
1320 protlen = ntohs(et->et_protlen);
1321 if (protlen == PROT_VLAN) {
1322 struct vlan_ethernet_hdr *vet =
1323 (struct vlan_ethernet_hdr *)et;
1324 vet->vet_type = htons(prot);
1325 return VLAN_ETHER_HDR_SIZE;
1326 } else if (protlen > 1514) {
1327 et->et_protlen = htons(prot);
1328 return ETHER_HDR_SIZE;
1331 struct e802_hdr *et802 = (struct e802_hdr *)et;
1332 et802->et_prot = htons(prot);
1333 return E802_HDR_SIZE;
1337 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1339 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1342 * Construct an IP header.
1344 /* IP_HDR_SIZE / 4 (not including UDP) */
1347 ip->ip_len = htons(IP_HDR_SIZE);
1348 ip->ip_id = htons(NetIPID++);
1349 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1352 /* already in network byte order */
1353 NetCopyIP((void *)&ip->ip_src, &source);
1354 /* already in network byte order */
1355 NetCopyIP((void *)&ip->ip_dst, &dest);
1358 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1361 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1364 * If the data is an odd number of bytes, zero the
1365 * byte after the last byte so that the checksum
1369 pkt[IP_UDP_HDR_SIZE + len] = 0;
1371 net_set_ip_header(pkt, dest, NetOurIP);
1372 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1373 ip->ip_p = IPPROTO_UDP;
1374 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1376 ip->udp_src = htons(sport);
1377 ip->udp_dst = htons(dport);
1378 ip->udp_len = htons(UDP_HDR_SIZE + len);
1382 void copy_filename(char *dst, const char *src, int size)
1384 if (*src && (*src == '"')) {
1389 while ((--size > 0) && *src && (*src != '"'))
1394 #if defined(CONFIG_CMD_NFS) || \
1395 defined(CONFIG_CMD_SNTP) || \
1396 defined(CONFIG_CMD_DNS)
1398 * make port a little random (1024-17407)
1399 * This keeps the math somewhat trivial to compute, and seems to work with
1400 * all supported protocols/clients/servers
1402 unsigned int random_port(void)
1404 return 1024 + (get_timer(0) % 0x4000);
1408 void ip_to_string(IPaddr_t x, char *s)
1411 sprintf(s, "%d.%d.%d.%d",
1412 (int) ((x >> 24) & 0xff),
1413 (int) ((x >> 16) & 0xff),
1414 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1418 void VLAN_to_string(ushort x, char *s)
1422 if (x == (ushort)-1)
1428 sprintf(s, "%d", x & VLAN_IDMASK);
1431 ushort string_to_VLAN(const char *s)
1436 return htons(VLAN_NONE);
1438 if (*s < '0' || *s > '9')
1441 id = (ushort)simple_strtoul(s, NULL, 10);
1446 ushort getenv_VLAN(char *var)
1448 return string_to_VLAN(getenv(var));