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
9 * SPDX-License-Identifier: GPL-2.0
15 * The user interface supports commands for BOOTP, RARP, and TFTP.
16 * Also, we support ARP internally. Depending on available data,
17 * these interact as follows:
21 * Prerequisites: - own ethernet address
22 * We want: - own IP address
23 * - TFTP server IP address
29 * Prerequisites: - own ethernet address
30 * We want: - own IP address
35 * Prerequisites: - own ethernet address
36 * We want: - own IP address
37 * - TFTP server IP address
42 * Prerequisites: - own ethernet address
44 * - TFTP server IP address
45 * We want: - TFTP server ethernet address
50 * Prerequisites: - own ethernet address
51 * We want: - IP, Netmask, ServerIP, Gateway IP
52 * - bootfilename, lease time
57 * Prerequisites: - own ethernet address
59 * - TFTP server IP address
60 * - TFTP server ethernet address
61 * - name of bootfile (if unknown, we use a default name
62 * derived from our own IP address)
63 * We want: - load the boot file
68 * Prerequisites: - own ethernet address
70 * - name of bootfile (if unknown, we use a default name
71 * derived from our own IP address)
72 * We want: - load the boot file
77 * Prerequisites: - own ethernet address
79 * We want: - network time
86 #include <environment.h>
88 #if defined(CONFIG_STATUS_LED)
90 #include <status_led.h>
93 #include <linux/compiler.h>
97 #if defined(CONFIG_CMD_DNS)
100 #include "link_local.h"
104 #if defined(CONFIG_CMD_SNTP)
109 DECLARE_GLOBAL_DATA_PTR;
111 /** BOOTP EXTENTIONS **/
113 /* Our subnet mask (0=unknown) */
114 IPaddr_t NetOurSubnetMask;
115 /* Our gateways IP address */
116 IPaddr_t NetOurGatewayIP;
117 /* Our DNS IP address */
118 IPaddr_t NetOurDNSIP;
119 #if defined(CONFIG_BOOTP_DNS2)
120 /* Our 2nd DNS IP address */
121 IPaddr_t NetOurDNS2IP;
124 char NetOurNISDomain[32] = {0,};
126 char NetOurHostName[32] = {0,};
128 char NetOurRootPath[64] = {0,};
129 /* Our bootfile size in blocks */
130 ushort NetBootFileSize;
132 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
136 /** END OF BOOTP EXTENTIONS **/
138 /* The actual transferred size of the bootfile (in bytes) */
139 ulong NetBootFileXferSize;
140 /* Our ethernet address */
141 uchar NetOurEther[6];
142 /* Boot server enet address */
143 uchar NetServerEther[6];
144 /* Our IP addr (0 = unknown) */
146 /* Server IP addr (0 = unknown) */
147 IPaddr_t NetServerIP;
148 /* Current receive packet */
150 /* Current rx packet length */
154 /* Ethernet bcast address */
155 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
156 uchar NetEtherNullAddr[6];
158 void (*push_packet)(void *, int len) = 0;
160 /* Network loop state */
161 enum net_loop_state net_state;
162 /* Tried all network devices */
164 /* Network loop restarted */
165 static int NetRestarted;
166 /* At least one device configured */
167 static int NetDevExists;
169 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
170 /* default is without VLAN */
171 ushort NetOurVLAN = 0xFFFF;
173 ushort NetOurNativeVLAN = 0xFFFF;
178 #if defined(CONFIG_CMD_SNTP)
179 /* NTP server IP address */
180 IPaddr_t NetNtpServerIP;
181 /* offset time from UTC */
185 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
188 uchar *NetRxPackets[PKTBUFSRX];
190 /* Current UDP RX packet handler */
191 static rxhand_f *udp_packet_handler;
192 /* Current ARP RX packet handler */
193 static rxhand_f *arp_packet_handler;
194 #ifdef CONFIG_CMD_TFTPPUT
195 /* Current ICMP rx handler */
196 static rxhand_icmp_f *packet_icmp_handler;
198 /* Current timeout handler */
199 static thand_f *timeHandler;
200 /* Time base value */
201 static ulong timeStart;
202 /* Current timeout value */
203 static ulong timeDelta;
204 /* THE transmit packet */
207 static int net_check_prereq(enum proto_t protocol);
209 static int NetTryCount;
211 int __maybe_unused net_busy_flag;
213 /**********************************************************************/
215 static int on_bootfile(const char *name, const char *value, enum env_op op,
220 case env_op_overwrite:
221 copy_filename(BootFile, value, sizeof(BootFile));
229 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
232 * Check if autoload is enabled. If so, use either NFS or TFTP to download
235 void net_auto_load(void)
237 #if defined(CONFIG_CMD_NFS)
238 const char *s = getenv("autoload");
240 if (s != NULL && strcmp(s, "NFS") == 0) {
242 * Use NFS to load the bootfile.
248 if (getenv_yesno("autoload") == 0) {
250 * Just use BOOTP/RARP to configure system;
251 * Do not use TFTP to load the bootfile.
253 net_set_state(NETLOOP_SUCCESS);
259 static void NetInitLoop(void)
261 static int env_changed_id;
262 int env_id = get_env_id();
264 /* update only when the environment has changed */
265 if (env_changed_id != env_id) {
266 NetOurIP = getenv_IPaddr("ipaddr");
267 NetOurGatewayIP = getenv_IPaddr("gatewayip");
268 NetOurSubnetMask = getenv_IPaddr("netmask");
269 NetServerIP = getenv_IPaddr("serverip");
270 NetOurNativeVLAN = getenv_VLAN("nvlan");
271 NetOurVLAN = getenv_VLAN("vlan");
272 #if defined(CONFIG_CMD_DNS)
273 NetOurDNSIP = getenv_IPaddr("dnsip");
275 env_changed_id = env_id;
278 memcpy(NetOurEther, eth_get_ethaddr(), 6);
283 static void net_clear_handlers(void)
285 net_set_udp_handler(NULL);
286 net_set_arp_handler(NULL);
287 NetSetTimeout(0, NULL);
290 static void net_cleanup_loop(void)
292 net_clear_handlers();
297 static int first_call = 1;
301 * Setup packet buffers, aligned correctly.
305 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
306 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
307 for (i = 0; i < PKTBUFSRX; i++)
308 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
311 net_clear_handlers();
313 /* Only need to setup buffer pointers once. */
320 /**********************************************************************/
322 * Main network processing loop.
325 int NetLoop(enum proto_t protocol)
332 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
334 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
336 if (eth_is_on_demand_init() || protocol != NETCONS) {
339 if (eth_init() < 0) {
344 eth_init_state_only();
347 #ifdef CONFIG_USB_KEYBOARD
350 net_set_state(NETLOOP_CONTINUE);
353 * Start the ball rolling with the given start function. From
354 * here on, this code is a state machine driven by received
355 * packets and timer events.
357 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
360 switch (net_check_prereq(protocol)) {
362 /* network not configured */
367 /* network device not configured */
372 NetBootFileXferSize = 0;
375 #ifdef CONFIG_CMD_TFTPPUT
378 /* always use ARP to get server ethernet address */
381 #ifdef CONFIG_CMD_TFTPSRV
386 #if defined(CONFIG_CMD_DHCP)
390 DhcpRequest(); /* Basically same as BOOTP */
400 #if defined(CONFIG_CMD_RARP)
407 #if defined(CONFIG_CMD_PING)
412 #if defined(CONFIG_CMD_NFS)
417 #if defined(CONFIG_CMD_CDP)
422 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
427 #if defined(CONFIG_CMD_SNTP)
432 #if defined(CONFIG_CMD_DNS)
437 #if defined(CONFIG_CMD_LINK_LOCAL)
449 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
450 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
451 defined(CONFIG_STATUS_LED) && \
452 defined(STATUS_LED_RED)
454 * Echo the inverted link state to the fault LED.
456 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
457 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
459 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
460 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
461 #endif /* CONFIG_MII, ... */
462 #ifdef CONFIG_USB_KEYBOARD
467 * Main packet reception loop. Loop receiving packets until
468 * someone sets `net_state' to a state that terminates.
472 #ifdef CONFIG_SHOW_ACTIVITY
476 * Check the ethernet for a new packet. The ethernet
477 * receive routine will process it.
482 * Abort if ctrl-c was pressed.
485 /* cancel any ARP that may not have completed */
486 NetArpWaitPacketIP = 0;
490 /* Invalidate the last protocol */
491 eth_set_last_protocol(BOOTP);
494 /* include a debug print as well incase the debug
495 messages are directed to stderr */
496 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
503 * Check for a timeout, and run the timeout handler
506 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
509 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
510 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
511 defined(CONFIG_STATUS_LED) && \
512 defined(STATUS_LED_RED)
514 * Echo the inverted link state to the fault LED.
516 if (miiphy_link(eth_get_dev()->name,
517 CONFIG_SYS_FAULT_MII_ADDR)) {
518 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
520 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
522 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
523 #endif /* CONFIG_MII, ... */
524 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
526 timeHandler = (thand_f *)0;
533 case NETLOOP_RESTART:
537 case NETLOOP_SUCCESS:
539 if (NetBootFileXferSize > 0) {
540 printf("Bytes transferred = %ld (%lx hex)\n",
542 NetBootFileXferSize);
543 setenv_hex("filesize", NetBootFileXferSize);
544 setenv_hex("fileaddr", load_addr);
546 if (protocol != NETCONS)
549 eth_halt_state_only();
551 eth_set_last_protocol(protocol);
553 ret = NetBootFileXferSize;
554 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
559 /* Invalidate the last protocol */
560 eth_set_last_protocol(BOOTP);
561 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
564 case NETLOOP_CONTINUE:
570 #ifdef CONFIG_USB_KEYBOARD
573 #ifdef CONFIG_CMD_TFTPPUT
574 /* Clear out the handlers */
575 net_set_udp_handler(NULL);
576 net_set_icmp_handler(NULL);
581 /**********************************************************************/
584 startAgainTimeout(void)
586 net_set_state(NETLOOP_RESTART);
589 void NetStartAgain(void)
592 int retry_forever = 0;
593 unsigned long retrycnt = 0;
595 nretry = getenv("netretry");
597 if (!strcmp(nretry, "yes"))
599 else if (!strcmp(nretry, "no"))
601 else if (!strcmp(nretry, "once"))
604 retrycnt = simple_strtoul(nretry, NULL, 0);
608 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
610 net_set_state(NETLOOP_FAIL);
617 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
618 eth_try_another(!NetRestarted);
621 if (NetRestartWrap) {
624 NetSetTimeout(10000UL, startAgainTimeout);
625 net_set_udp_handler(NULL);
627 net_set_state(NETLOOP_FAIL);
630 net_set_state(NETLOOP_RESTART);
634 /**********************************************************************/
639 static void dummy_handler(uchar *pkt, unsigned dport,
640 IPaddr_t sip, unsigned sport,
645 rxhand_f *net_get_udp_handler(void)
647 return udp_packet_handler;
650 void net_set_udp_handler(rxhand_f *f)
652 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
654 udp_packet_handler = dummy_handler;
656 udp_packet_handler = f;
659 rxhand_f *net_get_arp_handler(void)
661 return arp_packet_handler;
664 void net_set_arp_handler(rxhand_f *f)
666 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
668 arp_packet_handler = dummy_handler;
670 arp_packet_handler = f;
673 #ifdef CONFIG_CMD_TFTPPUT
674 void net_set_icmp_handler(rxhand_icmp_f *f)
676 packet_icmp_handler = f;
681 NetSetTimeout(ulong iv, thand_f *f)
684 debug_cond(DEBUG_INT_STATE,
685 "--- NetLoop timeout handler cancelled\n");
686 timeHandler = (thand_f *)0;
688 debug_cond(DEBUG_INT_STATE,
689 "--- NetLoop timeout handler set (%p)\n", f);
691 timeStart = get_timer(0);
692 timeDelta = iv * CONFIG_SYS_HZ / 1000;
696 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
703 /* make sure the NetTxPacket is initialized (NetInit() was called) */
704 assert(NetTxPacket != NULL);
705 if (NetTxPacket == NULL)
708 /* convert to new style broadcast */
712 /* if broadcast, make the ether address a broadcast and don't do ARP */
713 if (dest == 0xFFFFFFFF)
714 ether = NetBcastAddr;
716 pkt = (uchar *)NetTxPacket;
718 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
720 net_set_udp_header(pkt, dest, dport, sport, payload_len);
721 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
723 /* if MAC address was not discovered yet, do an ARP request */
724 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
725 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
727 /* save the ip and eth addr for the packet to send after arp */
728 NetArpWaitPacketIP = dest;
729 NetArpWaitPacketMAC = ether;
731 /* size of the waiting packet */
732 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
734 /* and do the ARP request */
736 NetArpWaitTimerStart = get_timer(0);
738 return 1; /* waiting */
740 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
742 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
743 return 0; /* transmitted */
747 #ifdef CONFIG_IP_DEFRAG
749 * This function collects fragments in a single packet, according
750 * to the algorithm in RFC815. It returns NULL or the pointer to
751 * a complete packet, in static storage
753 #ifndef CONFIG_NET_MAXDEFRAG
754 #define CONFIG_NET_MAXDEFRAG 16384
757 * MAXDEFRAG, above, is chosen in the config file and is real data
758 * so we need to add the NFS overhead, which is more than TFTP.
759 * To use sizeof in the internal unnamed structures, we need a real
760 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
761 * The compiler doesn't complain nor allocates the actual structure
763 static struct rpc_t rpc_specimen;
764 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
766 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
769 * this is the packet being assembled, either data or frag control.
770 * Fragments go by 8 bytes, so this union must be 8 bytes long
773 /* first_byte is address of this structure */
774 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
775 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
776 u16 prev_hole; /* index of prev, 0 == none */
780 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
782 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
783 static u16 first_hole, total_len;
784 struct hole *payload, *thisfrag, *h, *newh;
785 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
786 uchar *indata = (uchar *)ip;
787 int offset8, start, len, done = 0;
788 u16 ip_off = ntohs(ip->ip_off);
790 /* payload starts after IP header, this fragment is in there */
791 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
792 offset8 = (ip_off & IP_OFFS);
793 thisfrag = payload + offset8;
795 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
797 if (start + len > IP_MAXUDP) /* fragment extends too far */
800 if (!total_len || localip->ip_id != ip->ip_id) {
801 /* new (or different) packet, reset structs */
803 payload[0].last_byte = ~0;
804 payload[0].next_hole = 0;
805 payload[0].prev_hole = 0;
807 /* any IP header will work, copy the first we received */
808 memcpy(localip, ip, IP_HDR_SIZE);
812 * What follows is the reassembly algorithm. We use the payload
813 * array as a linked list of hole descriptors, as each hole starts
814 * at a multiple of 8 bytes. However, last byte can be whatever value,
815 * so it is represented as byte count, not as 8-byte blocks.
818 h = payload + first_hole;
819 while (h->last_byte < start) {
821 /* no hole that far away */
824 h = payload + h->next_hole;
827 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
828 if (offset8 + ((len + 7) / 8) <= h - payload) {
829 /* no overlap with holes (dup fragment?) */
833 if (!(ip_off & IP_FLAGS_MFRAG)) {
834 /* no more fragmentss: truncate this (last) hole */
835 total_len = start + len;
836 h->last_byte = start + len;
840 * There is some overlap: fix the hole list. This code doesn't
841 * deal with a fragment that overlaps with two different holes
842 * (thus being a superset of a previously-received fragment).
845 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
846 /* complete overlap with hole: remove hole */
847 if (!h->prev_hole && !h->next_hole) {
848 /* last remaining hole */
850 } else if (!h->prev_hole) {
852 first_hole = h->next_hole;
853 payload[h->next_hole].prev_hole = 0;
854 } else if (!h->next_hole) {
856 payload[h->prev_hole].next_hole = 0;
858 /* in the middle of the list */
859 payload[h->next_hole].prev_hole = h->prev_hole;
860 payload[h->prev_hole].next_hole = h->next_hole;
863 } else if (h->last_byte <= start + len) {
864 /* overlaps with final part of the hole: shorten this hole */
865 h->last_byte = start;
867 } else if (h >= thisfrag) {
868 /* overlaps with initial part of the hole: move this hole */
869 newh = thisfrag + (len / 8);
873 payload[h->next_hole].prev_hole = (h - payload);
875 payload[h->prev_hole].next_hole = (h - payload);
877 first_hole = (h - payload);
880 /* fragment sits in the middle: split the hole */
881 newh = thisfrag + (len / 8);
883 h->last_byte = start;
884 h->next_hole = (newh - payload);
885 newh->prev_hole = (h - payload);
887 payload[newh->next_hole].prev_hole = (newh - payload);
890 /* finally copy this fragment and possibly return whole packet */
891 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
895 localip->ip_len = htons(total_len);
896 *lenp = total_len + IP_HDR_SIZE;
900 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
902 u16 ip_off = ntohs(ip->ip_off);
903 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
904 return ip; /* not a fragment */
905 return __NetDefragment(ip, lenp);
908 #else /* !CONFIG_IP_DEFRAG */
910 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
912 u16 ip_off = ntohs(ip->ip_off);
913 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
914 return ip; /* not a fragment */
920 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
923 * @parma ip IP packet containing the ICMP
925 static void receive_icmp(struct ip_udp_hdr *ip, int len,
926 IPaddr_t src_ip, struct ethernet_hdr *et)
928 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
930 switch (icmph->type) {
932 if (icmph->code != ICMP_REDIR_HOST)
934 printf(" ICMP Host Redirect to %pI4 ",
938 #if defined(CONFIG_CMD_PING)
939 ping_receive(et, ip, len);
941 #ifdef CONFIG_CMD_TFTPPUT
942 if (packet_icmp_handler)
943 packet_icmp_handler(icmph->type, icmph->code,
944 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
945 icmph->un.data, ntohs(ip->udp_len));
952 NetReceive(uchar *inpkt, int len)
954 struct ethernet_hdr *et;
955 struct ip_udp_hdr *ip;
959 #if defined(CONFIG_CMD_CDP)
962 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
964 debug_cond(DEBUG_NET_PKT, "packet received\n");
967 NetRxPacketLen = len;
968 et = (struct ethernet_hdr *)inpkt;
970 /* too small packet? */
971 if (len < ETHER_HDR_SIZE)
976 (*push_packet)(inpkt, len);
981 #if defined(CONFIG_CMD_CDP)
982 /* keep track if packet is CDP */
983 iscdp = is_cdp_packet(et->et_dest);
986 myvlanid = ntohs(NetOurVLAN);
987 if (myvlanid == (ushort)-1)
988 myvlanid = VLAN_NONE;
989 mynvlanid = ntohs(NetOurNativeVLAN);
990 if (mynvlanid == (ushort)-1)
991 mynvlanid = VLAN_NONE;
993 eth_proto = ntohs(et->et_protlen);
995 if (eth_proto < 1514) {
996 struct e802_hdr *et802 = (struct e802_hdr *)et;
998 * Got a 802.2 packet. Check the other protocol field.
999 * XXX VLAN over 802.2+SNAP not implemented!
1001 eth_proto = ntohs(et802->et_prot);
1003 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
1004 len -= E802_HDR_SIZE;
1006 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1007 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
1008 len -= ETHER_HDR_SIZE;
1010 } else { /* VLAN packet */
1011 struct vlan_ethernet_hdr *vet =
1012 (struct vlan_ethernet_hdr *)et;
1014 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1016 /* too small packet? */
1017 if (len < VLAN_ETHER_HDR_SIZE)
1020 /* if no VLAN active */
1021 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1022 #if defined(CONFIG_CMD_CDP)
1028 cti = ntohs(vet->vet_tag);
1029 vlanid = cti & VLAN_IDMASK;
1030 eth_proto = ntohs(vet->vet_type);
1032 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
1033 len -= VLAN_ETHER_HDR_SIZE;
1036 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1038 #if defined(CONFIG_CMD_CDP)
1040 cdp_receive((uchar *)ip, len);
1045 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1046 if (vlanid == VLAN_NONE)
1047 vlanid = (mynvlanid & VLAN_IDMASK);
1049 if (vlanid != (myvlanid & VLAN_IDMASK))
1053 switch (eth_proto) {
1056 ArpReceive(et, ip, len);
1059 #ifdef CONFIG_CMD_RARP
1061 rarp_receive(ip, len);
1065 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1066 /* Before we start poking the header, make sure it is there */
1067 if (len < IP_UDP_HDR_SIZE) {
1068 debug("len bad %d < %lu\n", len,
1069 (ulong)IP_UDP_HDR_SIZE);
1072 /* Check the packet length */
1073 if (len < ntohs(ip->ip_len)) {
1074 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1077 len = ntohs(ip->ip_len);
1078 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1079 len, ip->ip_hl_v & 0xff);
1081 /* Can't deal with anything except IPv4 */
1082 if ((ip->ip_hl_v & 0xf0) != 0x40)
1084 /* Can't deal with IP options (headers != 20 bytes) */
1085 if ((ip->ip_hl_v & 0x0f) > 0x05)
1087 /* Check the Checksum of the header */
1088 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1089 debug("checksum bad\n");
1092 /* If it is not for us, ignore it */
1093 dst_ip = NetReadIP(&ip->ip_dst);
1094 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1095 #ifdef CONFIG_MCAST_TFTP
1096 if (Mcast_addr != dst_ip)
1100 /* Read source IP address for later use */
1101 src_ip = NetReadIP(&ip->ip_src);
1103 * The function returns the unchanged packet if it's not
1104 * a fragment, and either the complete packet or NULL if
1105 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1107 ip = NetDefragment(ip, &len);
1111 * watch for ICMP host redirects
1113 * There is no real handler code (yet). We just watch
1114 * for ICMP host redirect messages. In case anybody
1115 * sees these messages: please contact me
1116 * (wd@denx.de), or - even better - send me the
1117 * necessary fixes :-)
1119 * Note: in all cases where I have seen this so far
1120 * it was a problem with the router configuration,
1121 * for instance when a router was configured in the
1122 * BOOTP reply, but the TFTP server was on the same
1123 * subnet. So this is probably a warning that your
1124 * configuration might be wrong. But I'm not really
1125 * sure if there aren't any other situations.
1127 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1128 * we send a tftp packet to a dead connection, or when
1129 * there is no server at the other end.
1131 if (ip->ip_p == IPPROTO_ICMP) {
1132 receive_icmp(ip, len, src_ip, et);
1134 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1138 debug_cond(DEBUG_DEV_PKT,
1139 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1140 &dst_ip, &src_ip, len);
1142 #ifdef CONFIG_UDP_CHECKSUM
1143 if (ip->udp_xsum != 0) {
1149 xsum += (ntohs(ip->udp_len));
1150 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1151 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1152 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1153 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1155 sumlen = ntohs(ip->udp_len);
1156 sumptr = (ushort *) &(ip->udp_src);
1158 while (sumlen > 1) {
1161 sumdata = *sumptr++;
1162 xsum += ntohs(sumdata);
1168 sumdata = *(unsigned char *) sumptr;
1169 sumdata = (sumdata << 8) & 0xff00;
1172 while ((xsum >> 16) != 0) {
1173 xsum = (xsum & 0x0000ffff) +
1174 ((xsum >> 16) & 0x0000ffff);
1176 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1177 printf(" UDP wrong checksum %08lx %08x\n",
1178 xsum, ntohs(ip->udp_xsum));
1185 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1186 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1190 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1193 * IP header OK. Pass the packet to the current handler.
1195 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1199 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1205 /**********************************************************************/
1207 static int net_check_prereq(enum proto_t protocol)
1211 #if defined(CONFIG_CMD_PING)
1213 if (NetPingIP == 0) {
1214 puts("*** ERROR: ping address not given\n");
1219 #if defined(CONFIG_CMD_SNTP)
1221 if (NetNtpServerIP == 0) {
1222 puts("*** ERROR: NTP server address not given\n");
1227 #if defined(CONFIG_CMD_DNS)
1229 if (NetOurDNSIP == 0) {
1230 puts("*** ERROR: DNS server address not given\n");
1235 #if defined(CONFIG_CMD_NFS)
1240 if (NetServerIP == 0) {
1241 puts("*** ERROR: `serverip' not set\n");
1244 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1245 defined(CONFIG_CMD_DNS)
1252 if (NetOurIP == 0) {
1253 puts("*** ERROR: `ipaddr' not set\n");
1258 #ifdef CONFIG_CMD_RARP
1265 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1266 int num = eth_get_dev_index();
1270 puts("*** ERROR: No ethernet found.\n");
1273 puts("*** ERROR: `ethaddr' not set\n");
1276 printf("*** ERROR: `eth%daddr' not set\n",
1290 /**********************************************************************/
1297 myvlanid = ntohs(NetOurVLAN);
1298 if (myvlanid == (ushort)-1)
1299 myvlanid = VLAN_NONE;
1301 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1302 VLAN_ETHER_HDR_SIZE;
1306 NetSetEther(uchar *xet, uchar * addr, uint prot)
1308 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1311 myvlanid = ntohs(NetOurVLAN);
1312 if (myvlanid == (ushort)-1)
1313 myvlanid = VLAN_NONE;
1315 memcpy(et->et_dest, addr, 6);
1316 memcpy(et->et_src, NetOurEther, 6);
1317 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1318 et->et_protlen = htons(prot);
1319 return ETHER_HDR_SIZE;
1321 struct vlan_ethernet_hdr *vet =
1322 (struct vlan_ethernet_hdr *)xet;
1324 vet->vet_vlan_type = htons(PROT_VLAN);
1325 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1326 vet->vet_type = htons(prot);
1327 return VLAN_ETHER_HDR_SIZE;
1331 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1335 memcpy(et->et_dest, addr, 6);
1336 memcpy(et->et_src, NetOurEther, 6);
1337 protlen = ntohs(et->et_protlen);
1338 if (protlen == PROT_VLAN) {
1339 struct vlan_ethernet_hdr *vet =
1340 (struct vlan_ethernet_hdr *)et;
1341 vet->vet_type = htons(prot);
1342 return VLAN_ETHER_HDR_SIZE;
1343 } else if (protlen > 1514) {
1344 et->et_protlen = htons(prot);
1345 return ETHER_HDR_SIZE;
1348 struct e802_hdr *et802 = (struct e802_hdr *)et;
1349 et802->et_prot = htons(prot);
1350 return E802_HDR_SIZE;
1354 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1356 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1359 * Construct an IP header.
1361 /* IP_HDR_SIZE / 4 (not including UDP) */
1364 ip->ip_len = htons(IP_HDR_SIZE);
1365 ip->ip_id = htons(NetIPID++);
1366 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1369 /* already in network byte order */
1370 NetCopyIP((void *)&ip->ip_src, &source);
1371 /* already in network byte order */
1372 NetCopyIP((void *)&ip->ip_dst, &dest);
1375 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1378 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1381 * If the data is an odd number of bytes, zero the
1382 * byte after the last byte so that the checksum
1386 pkt[IP_UDP_HDR_SIZE + len] = 0;
1388 net_set_ip_header(pkt, dest, NetOurIP);
1389 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1390 ip->ip_p = IPPROTO_UDP;
1391 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1393 ip->udp_src = htons(sport);
1394 ip->udp_dst = htons(dport);
1395 ip->udp_len = htons(UDP_HDR_SIZE + len);
1399 void copy_filename(char *dst, const char *src, int size)
1401 if (*src && (*src == '"')) {
1406 while ((--size > 0) && *src && (*src != '"'))
1411 #if defined(CONFIG_CMD_NFS) || \
1412 defined(CONFIG_CMD_SNTP) || \
1413 defined(CONFIG_CMD_DNS)
1415 * make port a little random (1024-17407)
1416 * This keeps the math somewhat trivial to compute, and seems to work with
1417 * all supported protocols/clients/servers
1419 unsigned int random_port(void)
1421 return 1024 + (get_timer(0) % 0x4000);
1425 void ip_to_string(IPaddr_t x, char *s)
1428 sprintf(s, "%d.%d.%d.%d",
1429 (int) ((x >> 24) & 0xff),
1430 (int) ((x >> 16) & 0xff),
1431 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1435 void VLAN_to_string(ushort x, char *s)
1439 if (x == (ushort)-1)
1445 sprintf(s, "%d", x & VLAN_IDMASK);
1448 ushort string_to_VLAN(const char *s)
1453 return htons(VLAN_NONE);
1455 if (*s < '0' || *s > '9')
1458 id = (ushort)simple_strtoul(s, NULL, 10);
1463 ushort getenv_VLAN(char *var)
1465 return string_to_VLAN(getenv(var));