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>
89 #if defined(CONFIG_STATUS_LED)
91 #include <status_led.h>
94 #include <linux/compiler.h>
98 #if defined(CONFIG_CMD_DNS)
101 #include "link_local.h"
105 #if defined(CONFIG_CMD_SNTP)
110 DECLARE_GLOBAL_DATA_PTR;
112 /** BOOTP EXTENTIONS **/
114 /* Our subnet mask (0=unknown) */
115 struct in_addr net_netmask;
116 /* Our gateways IP address */
117 struct in_addr net_gateway;
118 /* Our DNS IP address */
119 struct in_addr net_dns_server;
120 #if defined(CONFIG_BOOTP_DNS2)
121 /* Our 2nd DNS IP address */
122 struct in_addr net_dns_server2;
125 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
126 struct in_addr net_mcast_addr;
129 /** END OF BOOTP EXTENTIONS **/
131 /* Our ethernet address */
132 uchar NetOurEther[6];
133 /* Boot server enet address */
134 uchar NetServerEther[6];
135 /* Our IP addr (0 = unknown) */
136 struct in_addr net_ip;
137 /* Server IP addr (0 = unknown) */
138 struct in_addr net_server_ip;
139 /* Current receive packet */
141 /* Current rx packet length */
145 /* Ethernet bcast address */
146 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
147 uchar NetEtherNullAddr[6];
149 void (*push_packet)(void *, int len) = 0;
151 /* Network loop state */
152 enum net_loop_state net_state;
153 /* Tried all network devices */
155 /* Network loop restarted */
156 static int NetRestarted;
157 /* At least one device configured */
158 static int NetDevExists;
160 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
161 /* default is without VLAN */
162 ushort NetOurVLAN = 0xFFFF;
164 ushort NetOurNativeVLAN = 0xFFFF;
167 char net_boot_file_name[128];
168 /* The actual transferred size of the bootfile (in bytes) */
169 u32 net_boot_file_size;
170 /* Boot file size in blocks as reported by the DHCP server */
171 u32 net_boot_file_expected_size_in_blocks;
173 #if defined(CONFIG_CMD_SNTP)
174 /* NTP server IP address */
175 struct in_addr net_ntp_server;
176 /* offset time from UTC */
180 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
182 /* Receive packets */
183 uchar *net_rx_packets[PKTBUFSRX];
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 int __maybe_unused net_busy_flag;
211 /**********************************************************************/
213 static int on_bootfile(const char *name, const char *value, enum env_op op,
218 case env_op_overwrite:
219 copy_filename(net_boot_file_name, value,
220 sizeof(net_boot_file_name));
228 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
231 * Check if autoload is enabled. If so, use either NFS or TFTP to download
234 void net_auto_load(void)
236 #if defined(CONFIG_CMD_NFS)
237 const char *s = getenv("autoload");
239 if (s != NULL && strcmp(s, "NFS") == 0) {
241 * Use NFS to load the bootfile.
247 if (getenv_yesno("autoload") == 0) {
249 * Just use BOOTP/RARP to configure system;
250 * Do not use TFTP to load the bootfile.
252 net_set_state(NETLOOP_SUCCESS);
258 static void NetInitLoop(void)
260 static int env_changed_id;
261 int env_id = get_env_id();
263 /* update only when the environment has changed */
264 if (env_changed_id != env_id) {
265 net_ip = getenv_ip("ipaddr");
266 net_gateway = getenv_ip("gatewayip");
267 net_netmask = getenv_ip("netmask");
268 net_server_ip = getenv_ip("serverip");
269 NetOurNativeVLAN = getenv_VLAN("nvlan");
270 NetOurVLAN = getenv_VLAN("vlan");
271 #if defined(CONFIG_CMD_DNS)
272 net_dns_server = getenv_ip("dnsip");
274 env_changed_id = env_id;
277 memcpy(NetOurEther, eth_get_ethaddr(), 6);
282 static void net_clear_handlers(void)
284 net_set_udp_handler(NULL);
285 net_set_arp_handler(NULL);
286 NetSetTimeout(0, NULL);
289 static void net_cleanup_loop(void)
291 net_clear_handlers();
296 static int first_call = 1;
300 * Setup packet buffers, aligned correctly.
304 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
305 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
307 for (i = 0; i < PKTBUFSRX; i++) {
308 net_rx_packets[i] = NetTxPacket + (i + 1) *
312 for (i = 0; i < PKTBUFSRX; i++)
313 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
316 net_clear_handlers();
318 /* Only need to setup buffer pointers once. */
325 /**********************************************************************/
327 * Main network processing loop.
330 int NetLoop(enum proto_t protocol)
337 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
339 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
341 if (eth_is_on_demand_init() || protocol != NETCONS) {
350 eth_init_state_only();
353 #ifdef CONFIG_USB_KEYBOARD
356 net_set_state(NETLOOP_CONTINUE);
359 * Start the ball rolling with the given start function. From
360 * here on, this code is a state machine driven by received
361 * packets and timer events.
363 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
366 switch (net_check_prereq(protocol)) {
368 /* network not configured */
373 /* network device not configured */
378 net_boot_file_size = 0;
381 #ifdef CONFIG_CMD_TFTPPUT
384 /* always use ARP to get server ethernet address */
387 #ifdef CONFIG_CMD_TFTPSRV
392 #if defined(CONFIG_CMD_DHCP)
396 DhcpRequest(); /* Basically same as BOOTP */
406 #if defined(CONFIG_CMD_RARP)
413 #if defined(CONFIG_CMD_PING)
418 #if defined(CONFIG_CMD_NFS)
423 #if defined(CONFIG_CMD_CDP)
428 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
433 #if defined(CONFIG_CMD_SNTP)
438 #if defined(CONFIG_CMD_DNS)
443 #if defined(CONFIG_CMD_LINK_LOCAL)
455 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
456 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
457 defined(CONFIG_STATUS_LED) && \
458 defined(STATUS_LED_RED)
460 * Echo the inverted link state to the fault LED.
462 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
463 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
465 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
466 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
467 #endif /* CONFIG_MII, ... */
468 #ifdef CONFIG_USB_KEYBOARD
473 * Main packet reception loop. Loop receiving packets until
474 * someone sets `net_state' to a state that terminates.
478 #ifdef CONFIG_SHOW_ACTIVITY
482 * Check the ethernet for a new packet. The ethernet
483 * receive routine will process it.
484 * Most drivers return the most recent packet size, but not
485 * errors that may have happened.
490 * Abort if ctrl-c was pressed.
493 /* cancel any ARP that may not have completed */
494 net_arp_wait_packet_ip.s_addr = 0;
498 /* Invalidate the last protocol */
499 eth_set_last_protocol(BOOTP);
502 /* include a debug print as well incase the debug
503 messages are directed to stderr */
504 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
511 * Check for a timeout, and run the timeout handler
514 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
517 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
518 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
519 defined(CONFIG_STATUS_LED) && \
520 defined(STATUS_LED_RED)
522 * Echo the inverted link state to the fault LED.
524 if (miiphy_link(eth_get_dev()->name,
525 CONFIG_SYS_FAULT_MII_ADDR)) {
526 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
528 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
530 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
531 #endif /* CONFIG_MII, ... */
532 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
534 timeHandler = (thand_f *)0;
538 if (net_state == NETLOOP_FAIL)
539 ret = NetStartAgain();
543 case NETLOOP_RESTART:
547 case NETLOOP_SUCCESS:
549 if (net_boot_file_size > 0) {
550 printf("Bytes transferred = %d (%x hex)\n",
551 net_boot_file_size, net_boot_file_size);
552 setenv_hex("filesize", net_boot_file_size);
553 setenv_hex("fileaddr", load_addr);
555 if (protocol != NETCONS)
558 eth_halt_state_only();
560 eth_set_last_protocol(protocol);
562 ret = net_boot_file_size;
563 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
568 /* Invalidate the last protocol */
569 eth_set_last_protocol(BOOTP);
570 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
573 case NETLOOP_CONTINUE:
579 #ifdef CONFIG_USB_KEYBOARD
582 #ifdef CONFIG_CMD_TFTPPUT
583 /* Clear out the handlers */
584 net_set_udp_handler(NULL);
585 net_set_icmp_handler(NULL);
590 /**********************************************************************/
593 startAgainTimeout(void)
595 net_set_state(NETLOOP_RESTART);
598 int NetStartAgain(void)
601 int retry_forever = 0;
602 unsigned long retrycnt = 0;
605 nretry = getenv("netretry");
607 if (!strcmp(nretry, "yes"))
609 else if (!strcmp(nretry, "no"))
611 else if (!strcmp(nretry, "once"))
614 retrycnt = simple_strtoul(nretry, NULL, 0);
620 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
622 net_set_state(NETLOOP_FAIL);
624 * We don't provide a way for the protocol to return an error,
625 * but this is almost always the reason.
633 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
634 eth_try_another(!NetRestarted);
637 if (NetRestartWrap) {
640 NetSetTimeout(10000UL, startAgainTimeout);
641 net_set_udp_handler(NULL);
643 net_set_state(NETLOOP_FAIL);
646 net_set_state(NETLOOP_RESTART);
651 /**********************************************************************/
656 static void dummy_handler(uchar *pkt, unsigned dport,
657 struct in_addr sip, unsigned sport,
662 rxhand_f *net_get_udp_handler(void)
664 return udp_packet_handler;
667 void net_set_udp_handler(rxhand_f *f)
669 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
671 udp_packet_handler = dummy_handler;
673 udp_packet_handler = f;
676 rxhand_f *net_get_arp_handler(void)
678 return arp_packet_handler;
681 void net_set_arp_handler(rxhand_f *f)
683 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
685 arp_packet_handler = dummy_handler;
687 arp_packet_handler = f;
690 #ifdef CONFIG_CMD_TFTPPUT
691 void net_set_icmp_handler(rxhand_icmp_f *f)
693 packet_icmp_handler = f;
698 NetSetTimeout(ulong iv, thand_f *f)
701 debug_cond(DEBUG_INT_STATE,
702 "--- NetLoop timeout handler cancelled\n");
703 timeHandler = (thand_f *)0;
705 debug_cond(DEBUG_INT_STATE,
706 "--- NetLoop timeout handler set (%p)\n", f);
708 timeStart = get_timer(0);
709 timeDelta = iv * CONFIG_SYS_HZ / 1000;
713 int NetSendUDPPacket(uchar *ether, struct in_addr dest, int dport, int sport,
720 /* make sure the NetTxPacket is initialized (NetInit() was called) */
721 assert(NetTxPacket != NULL);
722 if (NetTxPacket == NULL)
725 /* convert to new style broadcast */
726 if (dest.s_addr == 0)
727 dest.s_addr = 0xFFFFFFFF;
729 /* if broadcast, make the ether address a broadcast and don't do ARP */
730 if (dest.s_addr == 0xFFFFFFFF)
731 ether = NetBcastAddr;
733 pkt = (uchar *)NetTxPacket;
735 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
737 net_set_udp_header(pkt, dest, dport, sport, payload_len);
738 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
740 /* if MAC address was not discovered yet, do an ARP request */
741 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
742 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
744 /* save the ip and eth addr for the packet to send after arp */
745 net_arp_wait_packet_ip = dest;
746 NetArpWaitPacketMAC = ether;
748 /* size of the waiting packet */
749 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
751 /* and do the ARP request */
753 NetArpWaitTimerStart = get_timer(0);
755 return 1; /* waiting */
757 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
759 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
760 return 0; /* transmitted */
764 #ifdef CONFIG_IP_DEFRAG
766 * This function collects fragments in a single packet, according
767 * to the algorithm in RFC815. It returns NULL or the pointer to
768 * a complete packet, in static storage
770 #ifndef CONFIG_NET_MAXDEFRAG
771 #define CONFIG_NET_MAXDEFRAG 16384
774 * MAXDEFRAG, above, is chosen in the config file and is real data
775 * so we need to add the NFS overhead, which is more than TFTP.
776 * To use sizeof in the internal unnamed structures, we need a real
777 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
778 * The compiler doesn't complain nor allocates the actual structure
780 static struct rpc_t rpc_specimen;
781 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
783 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
786 * this is the packet being assembled, either data or frag control.
787 * Fragments go by 8 bytes, so this union must be 8 bytes long
790 /* first_byte is address of this structure */
791 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
792 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
793 u16 prev_hole; /* index of prev, 0 == none */
797 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
799 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
800 static u16 first_hole, total_len;
801 struct hole *payload, *thisfrag, *h, *newh;
802 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
803 uchar *indata = (uchar *)ip;
804 int offset8, start, len, done = 0;
805 u16 ip_off = ntohs(ip->ip_off);
807 /* payload starts after IP header, this fragment is in there */
808 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
809 offset8 = (ip_off & IP_OFFS);
810 thisfrag = payload + offset8;
812 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
814 if (start + len > IP_MAXUDP) /* fragment extends too far */
817 if (!total_len || localip->ip_id != ip->ip_id) {
818 /* new (or different) packet, reset structs */
820 payload[0].last_byte = ~0;
821 payload[0].next_hole = 0;
822 payload[0].prev_hole = 0;
824 /* any IP header will work, copy the first we received */
825 memcpy(localip, ip, IP_HDR_SIZE);
829 * What follows is the reassembly algorithm. We use the payload
830 * array as a linked list of hole descriptors, as each hole starts
831 * at a multiple of 8 bytes. However, last byte can be whatever value,
832 * so it is represented as byte count, not as 8-byte blocks.
835 h = payload + first_hole;
836 while (h->last_byte < start) {
838 /* no hole that far away */
841 h = payload + h->next_hole;
844 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
845 if (offset8 + ((len + 7) / 8) <= h - payload) {
846 /* no overlap with holes (dup fragment?) */
850 if (!(ip_off & IP_FLAGS_MFRAG)) {
851 /* no more fragmentss: truncate this (last) hole */
852 total_len = start + len;
853 h->last_byte = start + len;
857 * There is some overlap: fix the hole list. This code doesn't
858 * deal with a fragment that overlaps with two different holes
859 * (thus being a superset of a previously-received fragment).
862 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
863 /* complete overlap with hole: remove hole */
864 if (!h->prev_hole && !h->next_hole) {
865 /* last remaining hole */
867 } else if (!h->prev_hole) {
869 first_hole = h->next_hole;
870 payload[h->next_hole].prev_hole = 0;
871 } else if (!h->next_hole) {
873 payload[h->prev_hole].next_hole = 0;
875 /* in the middle of the list */
876 payload[h->next_hole].prev_hole = h->prev_hole;
877 payload[h->prev_hole].next_hole = h->next_hole;
880 } else if (h->last_byte <= start + len) {
881 /* overlaps with final part of the hole: shorten this hole */
882 h->last_byte = start;
884 } else if (h >= thisfrag) {
885 /* overlaps with initial part of the hole: move this hole */
886 newh = thisfrag + (len / 8);
890 payload[h->next_hole].prev_hole = (h - payload);
892 payload[h->prev_hole].next_hole = (h - payload);
894 first_hole = (h - payload);
897 /* fragment sits in the middle: split the hole */
898 newh = thisfrag + (len / 8);
900 h->last_byte = start;
901 h->next_hole = (newh - payload);
902 newh->prev_hole = (h - payload);
904 payload[newh->next_hole].prev_hole = (newh - payload);
907 /* finally copy this fragment and possibly return whole packet */
908 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
912 localip->ip_len = htons(total_len);
913 *lenp = total_len + IP_HDR_SIZE;
917 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
919 u16 ip_off = ntohs(ip->ip_off);
920 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
921 return ip; /* not a fragment */
922 return __NetDefragment(ip, lenp);
925 #else /* !CONFIG_IP_DEFRAG */
927 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
929 u16 ip_off = ntohs(ip->ip_off);
930 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
931 return ip; /* not a fragment */
937 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
940 * @parma ip IP packet containing the ICMP
942 static void receive_icmp(struct ip_udp_hdr *ip, int len,
943 struct in_addr src_ip, struct ethernet_hdr *et)
945 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
947 switch (icmph->type) {
949 if (icmph->code != ICMP_REDIR_HOST)
951 printf(" ICMP Host Redirect to %pI4 ",
955 #if defined(CONFIG_CMD_PING)
956 ping_receive(et, ip, len);
958 #ifdef CONFIG_CMD_TFTPPUT
959 if (packet_icmp_handler)
960 packet_icmp_handler(icmph->type, icmph->code,
961 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
962 icmph->un.data, ntohs(ip->udp_len));
968 void net_process_received_packet(uchar *in_packet, int len)
970 struct ethernet_hdr *et;
971 struct ip_udp_hdr *ip;
972 struct in_addr dst_ip;
973 struct in_addr src_ip;
975 #if defined(CONFIG_CMD_CDP)
978 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
980 debug_cond(DEBUG_NET_PKT, "packet received\n");
982 NetRxPacket = in_packet;
983 NetRxPacketLen = len;
984 et = (struct ethernet_hdr *)in_packet;
986 /* too small packet? */
987 if (len < ETHER_HDR_SIZE)
992 (*push_packet)(in_packet, len);
997 #if defined(CONFIG_CMD_CDP)
998 /* keep track if packet is CDP */
999 iscdp = is_cdp_packet(et->et_dest);
1002 myvlanid = ntohs(NetOurVLAN);
1003 if (myvlanid == (ushort)-1)
1004 myvlanid = VLAN_NONE;
1005 mynvlanid = ntohs(NetOurNativeVLAN);
1006 if (mynvlanid == (ushort)-1)
1007 mynvlanid = VLAN_NONE;
1009 eth_proto = ntohs(et->et_protlen);
1011 if (eth_proto < 1514) {
1012 struct e802_hdr *et802 = (struct e802_hdr *)et;
1014 * Got a 802.2 packet. Check the other protocol field.
1015 * XXX VLAN over 802.2+SNAP not implemented!
1017 eth_proto = ntohs(et802->et_prot);
1019 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1020 len -= E802_HDR_SIZE;
1022 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1023 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1024 len -= ETHER_HDR_SIZE;
1026 } else { /* VLAN packet */
1027 struct vlan_ethernet_hdr *vet =
1028 (struct vlan_ethernet_hdr *)et;
1030 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1032 /* too small packet? */
1033 if (len < VLAN_ETHER_HDR_SIZE)
1036 /* if no VLAN active */
1037 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1038 #if defined(CONFIG_CMD_CDP)
1044 cti = ntohs(vet->vet_tag);
1045 vlanid = cti & VLAN_IDMASK;
1046 eth_proto = ntohs(vet->vet_type);
1048 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1049 len -= VLAN_ETHER_HDR_SIZE;
1052 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1054 #if defined(CONFIG_CMD_CDP)
1056 cdp_receive((uchar *)ip, len);
1061 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1062 if (vlanid == VLAN_NONE)
1063 vlanid = (mynvlanid & VLAN_IDMASK);
1065 if (vlanid != (myvlanid & VLAN_IDMASK))
1069 switch (eth_proto) {
1072 ArpReceive(et, ip, len);
1075 #ifdef CONFIG_CMD_RARP
1077 rarp_receive(ip, len);
1081 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1082 /* Before we start poking the header, make sure it is there */
1083 if (len < IP_UDP_HDR_SIZE) {
1084 debug("len bad %d < %lu\n", len,
1085 (ulong)IP_UDP_HDR_SIZE);
1088 /* Check the packet length */
1089 if (len < ntohs(ip->ip_len)) {
1090 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1093 len = ntohs(ip->ip_len);
1094 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1095 len, ip->ip_hl_v & 0xff);
1097 /* Can't deal with anything except IPv4 */
1098 if ((ip->ip_hl_v & 0xf0) != 0x40)
1100 /* Can't deal with IP options (headers != 20 bytes) */
1101 if ((ip->ip_hl_v & 0x0f) > 0x05)
1103 /* Check the Checksum of the header */
1104 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1105 debug("checksum bad\n");
1108 /* If it is not for us, ignore it */
1109 dst_ip = net_read_ip(&ip->ip_dst);
1110 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1111 dst_ip.s_addr != 0xFFFFFFFF) {
1112 #ifdef CONFIG_MCAST_TFTP
1113 if (net_mcast_addr != dst_ip)
1117 /* Read source IP address for later use */
1118 src_ip = net_read_ip(&ip->ip_src);
1120 * The function returns the unchanged packet if it's not
1121 * a fragment, and either the complete packet or NULL if
1122 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1124 ip = NetDefragment(ip, &len);
1128 * watch for ICMP host redirects
1130 * There is no real handler code (yet). We just watch
1131 * for ICMP host redirect messages. In case anybody
1132 * sees these messages: please contact me
1133 * (wd@denx.de), or - even better - send me the
1134 * necessary fixes :-)
1136 * Note: in all cases where I have seen this so far
1137 * it was a problem with the router configuration,
1138 * for instance when a router was configured in the
1139 * BOOTP reply, but the TFTP server was on the same
1140 * subnet. So this is probably a warning that your
1141 * configuration might be wrong. But I'm not really
1142 * sure if there aren't any other situations.
1144 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1145 * we send a tftp packet to a dead connection, or when
1146 * there is no server at the other end.
1148 if (ip->ip_p == IPPROTO_ICMP) {
1149 receive_icmp(ip, len, src_ip, et);
1151 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1155 debug_cond(DEBUG_DEV_PKT,
1156 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1157 &dst_ip, &src_ip, len);
1159 #ifdef CONFIG_UDP_CHECKSUM
1160 if (ip->udp_xsum != 0) {
1166 xsum += (ntohs(ip->udp_len));
1167 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1168 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1169 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1170 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1172 sumlen = ntohs(ip->udp_len);
1173 sumptr = (ushort *) &(ip->udp_src);
1175 while (sumlen > 1) {
1178 sumdata = *sumptr++;
1179 xsum += ntohs(sumdata);
1185 sumdata = *(unsigned char *) sumptr;
1186 sumdata = (sumdata << 8) & 0xff00;
1189 while ((xsum >> 16) != 0) {
1190 xsum = (xsum & 0x0000ffff) +
1191 ((xsum >> 16) & 0x0000ffff);
1193 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1194 printf(" UDP wrong checksum %08lx %08x\n",
1195 xsum, ntohs(ip->udp_xsum));
1202 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1203 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1207 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1210 * IP header OK. Pass the packet to the current handler.
1212 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1216 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1222 /**********************************************************************/
1224 static int net_check_prereq(enum proto_t protocol)
1228 #if defined(CONFIG_CMD_PING)
1230 if (net_ping_ip.s_addr == 0) {
1231 puts("*** ERROR: ping address not given\n");
1236 #if defined(CONFIG_CMD_SNTP)
1238 if (net_ntp_server.s_addr == 0) {
1239 puts("*** ERROR: NTP server address not given\n");
1244 #if defined(CONFIG_CMD_DNS)
1246 if (net_dns_server.s_addr == 0) {
1247 puts("*** ERROR: DNS server address not given\n");
1252 #if defined(CONFIG_CMD_NFS)
1257 if (net_server_ip.s_addr == 0) {
1258 puts("*** ERROR: `serverip' not set\n");
1261 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1262 defined(CONFIG_CMD_DNS)
1269 if (net_ip.s_addr == 0) {
1270 puts("*** ERROR: `ipaddr' not set\n");
1275 #ifdef CONFIG_CMD_RARP
1282 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1283 int num = eth_get_dev_index();
1287 puts("*** ERROR: No ethernet found.\n");
1290 puts("*** ERROR: `ethaddr' not set\n");
1293 printf("*** ERROR: `eth%daddr' not set\n",
1307 /**********************************************************************/
1314 myvlanid = ntohs(NetOurVLAN);
1315 if (myvlanid == (ushort)-1)
1316 myvlanid = VLAN_NONE;
1318 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1319 VLAN_ETHER_HDR_SIZE;
1323 NetSetEther(uchar *xet, uchar * addr, uint prot)
1325 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1328 myvlanid = ntohs(NetOurVLAN);
1329 if (myvlanid == (ushort)-1)
1330 myvlanid = VLAN_NONE;
1332 memcpy(et->et_dest, addr, 6);
1333 memcpy(et->et_src, NetOurEther, 6);
1334 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1335 et->et_protlen = htons(prot);
1336 return ETHER_HDR_SIZE;
1338 struct vlan_ethernet_hdr *vet =
1339 (struct vlan_ethernet_hdr *)xet;
1341 vet->vet_vlan_type = htons(PROT_VLAN);
1342 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1343 vet->vet_type = htons(prot);
1344 return VLAN_ETHER_HDR_SIZE;
1348 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1352 memcpy(et->et_dest, addr, 6);
1353 memcpy(et->et_src, NetOurEther, 6);
1354 protlen = ntohs(et->et_protlen);
1355 if (protlen == PROT_VLAN) {
1356 struct vlan_ethernet_hdr *vet =
1357 (struct vlan_ethernet_hdr *)et;
1358 vet->vet_type = htons(prot);
1359 return VLAN_ETHER_HDR_SIZE;
1360 } else if (protlen > 1514) {
1361 et->et_protlen = htons(prot);
1362 return ETHER_HDR_SIZE;
1365 struct e802_hdr *et802 = (struct e802_hdr *)et;
1366 et802->et_prot = htons(prot);
1367 return E802_HDR_SIZE;
1371 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1373 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1376 * Construct an IP header.
1378 /* IP_HDR_SIZE / 4 (not including UDP) */
1381 ip->ip_len = htons(IP_HDR_SIZE);
1382 ip->ip_id = htons(NetIPID++);
1383 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1386 /* already in network byte order */
1387 net_copy_ip((void *)&ip->ip_src, &source);
1388 /* already in network byte order */
1389 net_copy_ip((void *)&ip->ip_dst, &dest);
1392 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1395 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1398 * If the data is an odd number of bytes, zero the
1399 * byte after the last byte so that the checksum
1403 pkt[IP_UDP_HDR_SIZE + len] = 0;
1405 net_set_ip_header(pkt, dest, net_ip);
1406 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1407 ip->ip_p = IPPROTO_UDP;
1408 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1410 ip->udp_src = htons(sport);
1411 ip->udp_dst = htons(dport);
1412 ip->udp_len = htons(UDP_HDR_SIZE + len);
1416 void copy_filename(char *dst, const char *src, int size)
1418 if (*src && (*src == '"')) {
1423 while ((--size > 0) && *src && (*src != '"'))
1428 #if defined(CONFIG_CMD_NFS) || \
1429 defined(CONFIG_CMD_SNTP) || \
1430 defined(CONFIG_CMD_DNS)
1432 * make port a little random (1024-17407)
1433 * This keeps the math somewhat trivial to compute, and seems to work with
1434 * all supported protocols/clients/servers
1436 unsigned int random_port(void)
1438 return 1024 + (get_timer(0) % 0x4000);
1442 void ip_to_string(struct in_addr x, char *s)
1444 x.s_addr = ntohl(x.s_addr);
1445 sprintf(s, "%d.%d.%d.%d",
1446 (int) ((x.s_addr >> 24) & 0xff),
1447 (int) ((x.s_addr >> 16) & 0xff),
1448 (int) ((x.s_addr >> 8) & 0xff),
1449 (int) ((x.s_addr >> 0) & 0xff)
1453 void VLAN_to_string(ushort x, char *s)
1457 if (x == (ushort)-1)
1463 sprintf(s, "%d", x & VLAN_IDMASK);
1466 ushort string_to_VLAN(const char *s)
1471 return htons(VLAN_NONE);
1473 if (*s < '0' || *s > '9')
1476 id = (ushort)simple_strtoul(s, NULL, 10);
1481 ushort getenv_VLAN(char *var)
1483 return string_to_VLAN(getenv(var));