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 char NetOurNISDomain[32] = {0,};
127 char NetOurHostName[32] = {0,};
129 char NetOurRootPath[64] = {0,};
130 /* Our bootfile size in blocks */
131 ushort NetBootFileSize;
133 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
134 struct in_addr net_mcast_addr;
137 /** END OF BOOTP EXTENTIONS **/
139 /* The actual transferred size of the bootfile (in bytes) */
140 ulong NetBootFileXferSize;
141 /* Our ethernet address */
142 uchar NetOurEther[6];
143 /* Boot server enet address */
144 uchar NetServerEther[6];
145 /* Our IP addr (0 = unknown) */
146 struct in_addr net_ip;
147 /* Server IP addr (0 = unknown) */
148 struct in_addr net_server_ip;
149 /* Current receive packet */
151 /* Current rx packet length */
155 /* Ethernet bcast address */
156 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
157 uchar NetEtherNullAddr[6];
159 void (*push_packet)(void *, int len) = 0;
161 /* Network loop state */
162 enum net_loop_state net_state;
163 /* Tried all network devices */
165 /* Network loop restarted */
166 static int NetRestarted;
167 /* At least one device configured */
168 static int NetDevExists;
170 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
171 /* default is without VLAN */
172 ushort NetOurVLAN = 0xFFFF;
174 ushort NetOurNativeVLAN = 0xFFFF;
179 #if defined(CONFIG_CMD_SNTP)
180 /* NTP server IP address */
181 struct in_addr net_ntp_server;
182 /* offset time from UTC */
186 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
188 /* Receive packets */
189 uchar *net_rx_packets[PKTBUFSRX];
192 uchar *NetRxPackets[PKTBUFSRX];
194 /* Current UDP RX packet handler */
195 static rxhand_f *udp_packet_handler;
196 /* Current ARP RX packet handler */
197 static rxhand_f *arp_packet_handler;
198 #ifdef CONFIG_CMD_TFTPPUT
199 /* Current ICMP rx handler */
200 static rxhand_icmp_f *packet_icmp_handler;
202 /* Current timeout handler */
203 static thand_f *timeHandler;
204 /* Time base value */
205 static ulong timeStart;
206 /* Current timeout value */
207 static ulong timeDelta;
208 /* THE transmit packet */
211 static int net_check_prereq(enum proto_t protocol);
213 static int NetTryCount;
215 int __maybe_unused net_busy_flag;
217 /**********************************************************************/
219 static int on_bootfile(const char *name, const char *value, enum env_op op,
224 case env_op_overwrite:
225 copy_filename(BootFile, value, sizeof(BootFile));
233 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
236 * Check if autoload is enabled. If so, use either NFS or TFTP to download
239 void net_auto_load(void)
241 #if defined(CONFIG_CMD_NFS)
242 const char *s = getenv("autoload");
244 if (s != NULL && strcmp(s, "NFS") == 0) {
246 * Use NFS to load the bootfile.
252 if (getenv_yesno("autoload") == 0) {
254 * Just use BOOTP/RARP to configure system;
255 * Do not use TFTP to load the bootfile.
257 net_set_state(NETLOOP_SUCCESS);
263 static void NetInitLoop(void)
265 static int env_changed_id;
266 int env_id = get_env_id();
268 /* update only when the environment has changed */
269 if (env_changed_id != env_id) {
270 net_ip = getenv_ip("ipaddr");
271 net_gateway = getenv_ip("gatewayip");
272 net_netmask = getenv_ip("netmask");
273 net_server_ip = getenv_ip("serverip");
274 NetOurNativeVLAN = getenv_VLAN("nvlan");
275 NetOurVLAN = getenv_VLAN("vlan");
276 #if defined(CONFIG_CMD_DNS)
277 net_dns_server = getenv_ip("dnsip");
279 env_changed_id = env_id;
282 memcpy(NetOurEther, eth_get_ethaddr(), 6);
287 static void net_clear_handlers(void)
289 net_set_udp_handler(NULL);
290 net_set_arp_handler(NULL);
291 NetSetTimeout(0, NULL);
294 static void net_cleanup_loop(void)
296 net_clear_handlers();
301 static int first_call = 1;
305 * Setup packet buffers, aligned correctly.
309 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
310 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
312 for (i = 0; i < PKTBUFSRX; i++) {
313 net_rx_packets[i] = NetTxPacket + (i + 1) *
317 for (i = 0; i < PKTBUFSRX; i++)
318 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
321 net_clear_handlers();
323 /* Only need to setup buffer pointers once. */
330 /**********************************************************************/
332 * Main network processing loop.
335 int NetLoop(enum proto_t protocol)
342 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
344 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
346 if (eth_is_on_demand_init() || protocol != NETCONS) {
355 eth_init_state_only();
358 #ifdef CONFIG_USB_KEYBOARD
361 net_set_state(NETLOOP_CONTINUE);
364 * Start the ball rolling with the given start function. From
365 * here on, this code is a state machine driven by received
366 * packets and timer events.
368 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
371 switch (net_check_prereq(protocol)) {
373 /* network not configured */
378 /* network device not configured */
383 NetBootFileXferSize = 0;
386 #ifdef CONFIG_CMD_TFTPPUT
389 /* always use ARP to get server ethernet address */
392 #ifdef CONFIG_CMD_TFTPSRV
397 #if defined(CONFIG_CMD_DHCP)
401 DhcpRequest(); /* Basically same as BOOTP */
411 #if defined(CONFIG_CMD_RARP)
418 #if defined(CONFIG_CMD_PING)
423 #if defined(CONFIG_CMD_NFS)
428 #if defined(CONFIG_CMD_CDP)
433 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
438 #if defined(CONFIG_CMD_SNTP)
443 #if defined(CONFIG_CMD_DNS)
448 #if defined(CONFIG_CMD_LINK_LOCAL)
460 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
461 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
462 defined(CONFIG_STATUS_LED) && \
463 defined(STATUS_LED_RED)
465 * Echo the inverted link state to the fault LED.
467 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
468 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
470 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
471 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
472 #endif /* CONFIG_MII, ... */
473 #ifdef CONFIG_USB_KEYBOARD
478 * Main packet reception loop. Loop receiving packets until
479 * someone sets `net_state' to a state that terminates.
483 #ifdef CONFIG_SHOW_ACTIVITY
487 * Check the ethernet for a new packet. The ethernet
488 * receive routine will process it.
489 * Most drivers return the most recent packet size, but not
490 * errors that may have happened.
495 * Abort if ctrl-c was pressed.
498 /* cancel any ARP that may not have completed */
499 net_arp_wait_packet_ip.s_addr = 0;
503 /* Invalidate the last protocol */
504 eth_set_last_protocol(BOOTP);
507 /* include a debug print as well incase the debug
508 messages are directed to stderr */
509 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
516 * Check for a timeout, and run the timeout handler
519 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
522 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
523 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
524 defined(CONFIG_STATUS_LED) && \
525 defined(STATUS_LED_RED)
527 * Echo the inverted link state to the fault LED.
529 if (miiphy_link(eth_get_dev()->name,
530 CONFIG_SYS_FAULT_MII_ADDR)) {
531 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
533 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
535 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
536 #endif /* CONFIG_MII, ... */
537 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
539 timeHandler = (thand_f *)0;
543 if (net_state == NETLOOP_FAIL)
544 ret = NetStartAgain();
548 case NETLOOP_RESTART:
552 case NETLOOP_SUCCESS:
554 if (NetBootFileXferSize > 0) {
555 printf("Bytes transferred = %ld (%lx hex)\n",
557 NetBootFileXferSize);
558 setenv_hex("filesize", NetBootFileXferSize);
559 setenv_hex("fileaddr", load_addr);
561 if (protocol != NETCONS)
564 eth_halt_state_only();
566 eth_set_last_protocol(protocol);
568 ret = NetBootFileXferSize;
569 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
574 /* Invalidate the last protocol */
575 eth_set_last_protocol(BOOTP);
576 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
579 case NETLOOP_CONTINUE:
585 #ifdef CONFIG_USB_KEYBOARD
588 #ifdef CONFIG_CMD_TFTPPUT
589 /* Clear out the handlers */
590 net_set_udp_handler(NULL);
591 net_set_icmp_handler(NULL);
596 /**********************************************************************/
599 startAgainTimeout(void)
601 net_set_state(NETLOOP_RESTART);
604 int NetStartAgain(void)
607 int retry_forever = 0;
608 unsigned long retrycnt = 0;
611 nretry = getenv("netretry");
613 if (!strcmp(nretry, "yes"))
615 else if (!strcmp(nretry, "no"))
617 else if (!strcmp(nretry, "once"))
620 retrycnt = simple_strtoul(nretry, NULL, 0);
626 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
628 net_set_state(NETLOOP_FAIL);
630 * We don't provide a way for the protocol to return an error,
631 * but this is almost always the reason.
639 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
640 eth_try_another(!NetRestarted);
643 if (NetRestartWrap) {
646 NetSetTimeout(10000UL, startAgainTimeout);
647 net_set_udp_handler(NULL);
649 net_set_state(NETLOOP_FAIL);
652 net_set_state(NETLOOP_RESTART);
657 /**********************************************************************/
662 static void dummy_handler(uchar *pkt, unsigned dport,
663 struct in_addr sip, unsigned sport,
668 rxhand_f *net_get_udp_handler(void)
670 return udp_packet_handler;
673 void net_set_udp_handler(rxhand_f *f)
675 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
677 udp_packet_handler = dummy_handler;
679 udp_packet_handler = f;
682 rxhand_f *net_get_arp_handler(void)
684 return arp_packet_handler;
687 void net_set_arp_handler(rxhand_f *f)
689 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
691 arp_packet_handler = dummy_handler;
693 arp_packet_handler = f;
696 #ifdef CONFIG_CMD_TFTPPUT
697 void net_set_icmp_handler(rxhand_icmp_f *f)
699 packet_icmp_handler = f;
704 NetSetTimeout(ulong iv, thand_f *f)
707 debug_cond(DEBUG_INT_STATE,
708 "--- NetLoop timeout handler cancelled\n");
709 timeHandler = (thand_f *)0;
711 debug_cond(DEBUG_INT_STATE,
712 "--- NetLoop timeout handler set (%p)\n", f);
714 timeStart = get_timer(0);
715 timeDelta = iv * CONFIG_SYS_HZ / 1000;
719 int NetSendUDPPacket(uchar *ether, struct in_addr dest, int dport, int sport,
726 /* make sure the NetTxPacket is initialized (NetInit() was called) */
727 assert(NetTxPacket != NULL);
728 if (NetTxPacket == NULL)
731 /* convert to new style broadcast */
732 if (dest.s_addr == 0)
733 dest.s_addr = 0xFFFFFFFF;
735 /* if broadcast, make the ether address a broadcast and don't do ARP */
736 if (dest.s_addr == 0xFFFFFFFF)
737 ether = NetBcastAddr;
739 pkt = (uchar *)NetTxPacket;
741 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
743 net_set_udp_header(pkt, dest, dport, sport, payload_len);
744 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
746 /* if MAC address was not discovered yet, do an ARP request */
747 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
748 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
750 /* save the ip and eth addr for the packet to send after arp */
751 net_arp_wait_packet_ip = dest;
752 NetArpWaitPacketMAC = ether;
754 /* size of the waiting packet */
755 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
757 /* and do the ARP request */
759 NetArpWaitTimerStart = get_timer(0);
761 return 1; /* waiting */
763 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
765 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
766 return 0; /* transmitted */
770 #ifdef CONFIG_IP_DEFRAG
772 * This function collects fragments in a single packet, according
773 * to the algorithm in RFC815. It returns NULL or the pointer to
774 * a complete packet, in static storage
776 #ifndef CONFIG_NET_MAXDEFRAG
777 #define CONFIG_NET_MAXDEFRAG 16384
780 * MAXDEFRAG, above, is chosen in the config file and is real data
781 * so we need to add the NFS overhead, which is more than TFTP.
782 * To use sizeof in the internal unnamed structures, we need a real
783 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
784 * The compiler doesn't complain nor allocates the actual structure
786 static struct rpc_t rpc_specimen;
787 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
789 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
792 * this is the packet being assembled, either data or frag control.
793 * Fragments go by 8 bytes, so this union must be 8 bytes long
796 /* first_byte is address of this structure */
797 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
798 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
799 u16 prev_hole; /* index of prev, 0 == none */
803 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
805 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
806 static u16 first_hole, total_len;
807 struct hole *payload, *thisfrag, *h, *newh;
808 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
809 uchar *indata = (uchar *)ip;
810 int offset8, start, len, done = 0;
811 u16 ip_off = ntohs(ip->ip_off);
813 /* payload starts after IP header, this fragment is in there */
814 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
815 offset8 = (ip_off & IP_OFFS);
816 thisfrag = payload + offset8;
818 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
820 if (start + len > IP_MAXUDP) /* fragment extends too far */
823 if (!total_len || localip->ip_id != ip->ip_id) {
824 /* new (or different) packet, reset structs */
826 payload[0].last_byte = ~0;
827 payload[0].next_hole = 0;
828 payload[0].prev_hole = 0;
830 /* any IP header will work, copy the first we received */
831 memcpy(localip, ip, IP_HDR_SIZE);
835 * What follows is the reassembly algorithm. We use the payload
836 * array as a linked list of hole descriptors, as each hole starts
837 * at a multiple of 8 bytes. However, last byte can be whatever value,
838 * so it is represented as byte count, not as 8-byte blocks.
841 h = payload + first_hole;
842 while (h->last_byte < start) {
844 /* no hole that far away */
847 h = payload + h->next_hole;
850 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
851 if (offset8 + ((len + 7) / 8) <= h - payload) {
852 /* no overlap with holes (dup fragment?) */
856 if (!(ip_off & IP_FLAGS_MFRAG)) {
857 /* no more fragmentss: truncate this (last) hole */
858 total_len = start + len;
859 h->last_byte = start + len;
863 * There is some overlap: fix the hole list. This code doesn't
864 * deal with a fragment that overlaps with two different holes
865 * (thus being a superset of a previously-received fragment).
868 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
869 /* complete overlap with hole: remove hole */
870 if (!h->prev_hole && !h->next_hole) {
871 /* last remaining hole */
873 } else if (!h->prev_hole) {
875 first_hole = h->next_hole;
876 payload[h->next_hole].prev_hole = 0;
877 } else if (!h->next_hole) {
879 payload[h->prev_hole].next_hole = 0;
881 /* in the middle of the list */
882 payload[h->next_hole].prev_hole = h->prev_hole;
883 payload[h->prev_hole].next_hole = h->next_hole;
886 } else if (h->last_byte <= start + len) {
887 /* overlaps with final part of the hole: shorten this hole */
888 h->last_byte = start;
890 } else if (h >= thisfrag) {
891 /* overlaps with initial part of the hole: move this hole */
892 newh = thisfrag + (len / 8);
896 payload[h->next_hole].prev_hole = (h - payload);
898 payload[h->prev_hole].next_hole = (h - payload);
900 first_hole = (h - payload);
903 /* fragment sits in the middle: split the hole */
904 newh = thisfrag + (len / 8);
906 h->last_byte = start;
907 h->next_hole = (newh - payload);
908 newh->prev_hole = (h - payload);
910 payload[newh->next_hole].prev_hole = (newh - payload);
913 /* finally copy this fragment and possibly return whole packet */
914 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
918 localip->ip_len = htons(total_len);
919 *lenp = total_len + IP_HDR_SIZE;
923 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
925 u16 ip_off = ntohs(ip->ip_off);
926 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
927 return ip; /* not a fragment */
928 return __NetDefragment(ip, lenp);
931 #else /* !CONFIG_IP_DEFRAG */
933 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
935 u16 ip_off = ntohs(ip->ip_off);
936 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
937 return ip; /* not a fragment */
943 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
946 * @parma ip IP packet containing the ICMP
948 static void receive_icmp(struct ip_udp_hdr *ip, int len,
949 struct in_addr src_ip, struct ethernet_hdr *et)
951 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
953 switch (icmph->type) {
955 if (icmph->code != ICMP_REDIR_HOST)
957 printf(" ICMP Host Redirect to %pI4 ",
961 #if defined(CONFIG_CMD_PING)
962 ping_receive(et, ip, len);
964 #ifdef CONFIG_CMD_TFTPPUT
965 if (packet_icmp_handler)
966 packet_icmp_handler(icmph->type, icmph->code,
967 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
968 icmph->un.data, ntohs(ip->udp_len));
974 void net_process_received_packet(uchar *in_packet, int len)
976 struct ethernet_hdr *et;
977 struct ip_udp_hdr *ip;
978 struct in_addr dst_ip;
979 struct in_addr src_ip;
981 #if defined(CONFIG_CMD_CDP)
984 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
986 debug_cond(DEBUG_NET_PKT, "packet received\n");
988 NetRxPacket = in_packet;
989 NetRxPacketLen = len;
990 et = (struct ethernet_hdr *)in_packet;
992 /* too small packet? */
993 if (len < ETHER_HDR_SIZE)
998 (*push_packet)(in_packet, len);
1003 #if defined(CONFIG_CMD_CDP)
1004 /* keep track if packet is CDP */
1005 iscdp = is_cdp_packet(et->et_dest);
1008 myvlanid = ntohs(NetOurVLAN);
1009 if (myvlanid == (ushort)-1)
1010 myvlanid = VLAN_NONE;
1011 mynvlanid = ntohs(NetOurNativeVLAN);
1012 if (mynvlanid == (ushort)-1)
1013 mynvlanid = VLAN_NONE;
1015 eth_proto = ntohs(et->et_protlen);
1017 if (eth_proto < 1514) {
1018 struct e802_hdr *et802 = (struct e802_hdr *)et;
1020 * Got a 802.2 packet. Check the other protocol field.
1021 * XXX VLAN over 802.2+SNAP not implemented!
1023 eth_proto = ntohs(et802->et_prot);
1025 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1026 len -= E802_HDR_SIZE;
1028 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1029 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1030 len -= ETHER_HDR_SIZE;
1032 } else { /* VLAN packet */
1033 struct vlan_ethernet_hdr *vet =
1034 (struct vlan_ethernet_hdr *)et;
1036 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1038 /* too small packet? */
1039 if (len < VLAN_ETHER_HDR_SIZE)
1042 /* if no VLAN active */
1043 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1044 #if defined(CONFIG_CMD_CDP)
1050 cti = ntohs(vet->vet_tag);
1051 vlanid = cti & VLAN_IDMASK;
1052 eth_proto = ntohs(vet->vet_type);
1054 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1055 len -= VLAN_ETHER_HDR_SIZE;
1058 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1060 #if defined(CONFIG_CMD_CDP)
1062 cdp_receive((uchar *)ip, len);
1067 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1068 if (vlanid == VLAN_NONE)
1069 vlanid = (mynvlanid & VLAN_IDMASK);
1071 if (vlanid != (myvlanid & VLAN_IDMASK))
1075 switch (eth_proto) {
1078 ArpReceive(et, ip, len);
1081 #ifdef CONFIG_CMD_RARP
1083 rarp_receive(ip, len);
1087 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1088 /* Before we start poking the header, make sure it is there */
1089 if (len < IP_UDP_HDR_SIZE) {
1090 debug("len bad %d < %lu\n", len,
1091 (ulong)IP_UDP_HDR_SIZE);
1094 /* Check the packet length */
1095 if (len < ntohs(ip->ip_len)) {
1096 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1099 len = ntohs(ip->ip_len);
1100 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1101 len, ip->ip_hl_v & 0xff);
1103 /* Can't deal with anything except IPv4 */
1104 if ((ip->ip_hl_v & 0xf0) != 0x40)
1106 /* Can't deal with IP options (headers != 20 bytes) */
1107 if ((ip->ip_hl_v & 0x0f) > 0x05)
1109 /* Check the Checksum of the header */
1110 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1111 debug("checksum bad\n");
1114 /* If it is not for us, ignore it */
1115 dst_ip = net_read_ip(&ip->ip_dst);
1116 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1117 dst_ip.s_addr != 0xFFFFFFFF) {
1118 #ifdef CONFIG_MCAST_TFTP
1119 if (net_mcast_addr != dst_ip)
1123 /* Read source IP address for later use */
1124 src_ip = net_read_ip(&ip->ip_src);
1126 * The function returns the unchanged packet if it's not
1127 * a fragment, and either the complete packet or NULL if
1128 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1130 ip = NetDefragment(ip, &len);
1134 * watch for ICMP host redirects
1136 * There is no real handler code (yet). We just watch
1137 * for ICMP host redirect messages. In case anybody
1138 * sees these messages: please contact me
1139 * (wd@denx.de), or - even better - send me the
1140 * necessary fixes :-)
1142 * Note: in all cases where I have seen this so far
1143 * it was a problem with the router configuration,
1144 * for instance when a router was configured in the
1145 * BOOTP reply, but the TFTP server was on the same
1146 * subnet. So this is probably a warning that your
1147 * configuration might be wrong. But I'm not really
1148 * sure if there aren't any other situations.
1150 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1151 * we send a tftp packet to a dead connection, or when
1152 * there is no server at the other end.
1154 if (ip->ip_p == IPPROTO_ICMP) {
1155 receive_icmp(ip, len, src_ip, et);
1157 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1161 debug_cond(DEBUG_DEV_PKT,
1162 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1163 &dst_ip, &src_ip, len);
1165 #ifdef CONFIG_UDP_CHECKSUM
1166 if (ip->udp_xsum != 0) {
1172 xsum += (ntohs(ip->udp_len));
1173 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1174 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1175 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1176 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1178 sumlen = ntohs(ip->udp_len);
1179 sumptr = (ushort *) &(ip->udp_src);
1181 while (sumlen > 1) {
1184 sumdata = *sumptr++;
1185 xsum += ntohs(sumdata);
1191 sumdata = *(unsigned char *) sumptr;
1192 sumdata = (sumdata << 8) & 0xff00;
1195 while ((xsum >> 16) != 0) {
1196 xsum = (xsum & 0x0000ffff) +
1197 ((xsum >> 16) & 0x0000ffff);
1199 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1200 printf(" UDP wrong checksum %08lx %08x\n",
1201 xsum, ntohs(ip->udp_xsum));
1208 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1209 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1213 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1216 * IP header OK. Pass the packet to the current handler.
1218 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1222 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1228 /**********************************************************************/
1230 static int net_check_prereq(enum proto_t protocol)
1234 #if defined(CONFIG_CMD_PING)
1236 if (net_ping_ip.s_addr == 0) {
1237 puts("*** ERROR: ping address not given\n");
1242 #if defined(CONFIG_CMD_SNTP)
1244 if (net_ntp_server.s_addr == 0) {
1245 puts("*** ERROR: NTP server address not given\n");
1250 #if defined(CONFIG_CMD_DNS)
1252 if (net_dns_server.s_addr == 0) {
1253 puts("*** ERROR: DNS server address not given\n");
1258 #if defined(CONFIG_CMD_NFS)
1263 if (net_server_ip.s_addr == 0) {
1264 puts("*** ERROR: `serverip' not set\n");
1267 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1268 defined(CONFIG_CMD_DNS)
1275 if (net_ip.s_addr == 0) {
1276 puts("*** ERROR: `ipaddr' not set\n");
1281 #ifdef CONFIG_CMD_RARP
1288 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1289 int num = eth_get_dev_index();
1293 puts("*** ERROR: No ethernet found.\n");
1296 puts("*** ERROR: `ethaddr' not set\n");
1299 printf("*** ERROR: `eth%daddr' not set\n",
1313 /**********************************************************************/
1320 myvlanid = ntohs(NetOurVLAN);
1321 if (myvlanid == (ushort)-1)
1322 myvlanid = VLAN_NONE;
1324 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1325 VLAN_ETHER_HDR_SIZE;
1329 NetSetEther(uchar *xet, uchar * addr, uint prot)
1331 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1334 myvlanid = ntohs(NetOurVLAN);
1335 if (myvlanid == (ushort)-1)
1336 myvlanid = VLAN_NONE;
1338 memcpy(et->et_dest, addr, 6);
1339 memcpy(et->et_src, NetOurEther, 6);
1340 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1341 et->et_protlen = htons(prot);
1342 return ETHER_HDR_SIZE;
1344 struct vlan_ethernet_hdr *vet =
1345 (struct vlan_ethernet_hdr *)xet;
1347 vet->vet_vlan_type = htons(PROT_VLAN);
1348 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1349 vet->vet_type = htons(prot);
1350 return VLAN_ETHER_HDR_SIZE;
1354 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1358 memcpy(et->et_dest, addr, 6);
1359 memcpy(et->et_src, NetOurEther, 6);
1360 protlen = ntohs(et->et_protlen);
1361 if (protlen == PROT_VLAN) {
1362 struct vlan_ethernet_hdr *vet =
1363 (struct vlan_ethernet_hdr *)et;
1364 vet->vet_type = htons(prot);
1365 return VLAN_ETHER_HDR_SIZE;
1366 } else if (protlen > 1514) {
1367 et->et_protlen = htons(prot);
1368 return ETHER_HDR_SIZE;
1371 struct e802_hdr *et802 = (struct e802_hdr *)et;
1372 et802->et_prot = htons(prot);
1373 return E802_HDR_SIZE;
1377 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1379 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1382 * Construct an IP header.
1384 /* IP_HDR_SIZE / 4 (not including UDP) */
1387 ip->ip_len = htons(IP_HDR_SIZE);
1388 ip->ip_id = htons(NetIPID++);
1389 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1392 /* already in network byte order */
1393 net_copy_ip((void *)&ip->ip_src, &source);
1394 /* already in network byte order */
1395 net_copy_ip((void *)&ip->ip_dst, &dest);
1398 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1401 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1404 * If the data is an odd number of bytes, zero the
1405 * byte after the last byte so that the checksum
1409 pkt[IP_UDP_HDR_SIZE + len] = 0;
1411 net_set_ip_header(pkt, dest, net_ip);
1412 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1413 ip->ip_p = IPPROTO_UDP;
1414 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1416 ip->udp_src = htons(sport);
1417 ip->udp_dst = htons(dport);
1418 ip->udp_len = htons(UDP_HDR_SIZE + len);
1422 void copy_filename(char *dst, const char *src, int size)
1424 if (*src && (*src == '"')) {
1429 while ((--size > 0) && *src && (*src != '"'))
1434 #if defined(CONFIG_CMD_NFS) || \
1435 defined(CONFIG_CMD_SNTP) || \
1436 defined(CONFIG_CMD_DNS)
1438 * make port a little random (1024-17407)
1439 * This keeps the math somewhat trivial to compute, and seems to work with
1440 * all supported protocols/clients/servers
1442 unsigned int random_port(void)
1444 return 1024 + (get_timer(0) % 0x4000);
1448 void ip_to_string(struct in_addr x, char *s)
1450 x.s_addr = ntohl(x.s_addr);
1451 sprintf(s, "%d.%d.%d.%d",
1452 (int) ((x.s_addr >> 24) & 0xff),
1453 (int) ((x.s_addr >> 16) & 0xff),
1454 (int) ((x.s_addr >> 8) & 0xff),
1455 (int) ((x.s_addr >> 0) & 0xff)
1459 void VLAN_to_string(ushort x, char *s)
1463 if (x == (ushort)-1)
1469 sprintf(s, "%d", x & VLAN_IDMASK);
1472 ushort string_to_VLAN(const char *s)
1477 return htons(VLAN_NONE);
1479 if (*s < '0' || *s > '9')
1482 id = (ushort)simple_strtoul(s, NULL, 10);
1487 ushort getenv_VLAN(char *var)
1489 return string_to_VLAN(getenv(var));