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,};
131 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
132 struct in_addr net_mcast_addr;
135 /** END OF BOOTP EXTENTIONS **/
137 /* Our ethernet address */
138 uchar NetOurEther[6];
139 /* Boot server enet address */
140 uchar NetServerEther[6];
141 /* Our IP addr (0 = unknown) */
142 struct in_addr net_ip;
143 /* Server IP addr (0 = unknown) */
144 struct in_addr net_server_ip;
145 /* Current receive packet */
147 /* Current rx packet length */
151 /* Ethernet bcast address */
152 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
153 uchar NetEtherNullAddr[6];
155 void (*push_packet)(void *, int len) = 0;
157 /* Network loop state */
158 enum net_loop_state net_state;
159 /* Tried all network devices */
161 /* Network loop restarted */
162 static int NetRestarted;
163 /* At least one device configured */
164 static int NetDevExists;
166 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
167 /* default is without VLAN */
168 ushort NetOurVLAN = 0xFFFF;
170 ushort NetOurNativeVLAN = 0xFFFF;
173 char net_boot_file_name[128];
174 /* The actual transferred size of the bootfile (in bytes) */
175 u32 net_boot_file_size;
176 /* Boot file size in blocks as reported by the DHCP server */
177 u32 net_boot_file_expected_size_in_blocks;
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(net_boot_file_name, value,
226 sizeof(net_boot_file_name));
234 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
237 * Check if autoload is enabled. If so, use either NFS or TFTP to download
240 void net_auto_load(void)
242 #if defined(CONFIG_CMD_NFS)
243 const char *s = getenv("autoload");
245 if (s != NULL && strcmp(s, "NFS") == 0) {
247 * Use NFS to load the bootfile.
253 if (getenv_yesno("autoload") == 0) {
255 * Just use BOOTP/RARP to configure system;
256 * Do not use TFTP to load the bootfile.
258 net_set_state(NETLOOP_SUCCESS);
264 static void NetInitLoop(void)
266 static int env_changed_id;
267 int env_id = get_env_id();
269 /* update only when the environment has changed */
270 if (env_changed_id != env_id) {
271 net_ip = getenv_ip("ipaddr");
272 net_gateway = getenv_ip("gatewayip");
273 net_netmask = getenv_ip("netmask");
274 net_server_ip = getenv_ip("serverip");
275 NetOurNativeVLAN = getenv_VLAN("nvlan");
276 NetOurVLAN = getenv_VLAN("vlan");
277 #if defined(CONFIG_CMD_DNS)
278 net_dns_server = getenv_ip("dnsip");
280 env_changed_id = env_id;
283 memcpy(NetOurEther, eth_get_ethaddr(), 6);
288 static void net_clear_handlers(void)
290 net_set_udp_handler(NULL);
291 net_set_arp_handler(NULL);
292 NetSetTimeout(0, NULL);
295 static void net_cleanup_loop(void)
297 net_clear_handlers();
302 static int first_call = 1;
306 * Setup packet buffers, aligned correctly.
310 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
311 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
313 for (i = 0; i < PKTBUFSRX; i++) {
314 net_rx_packets[i] = NetTxPacket + (i + 1) *
318 for (i = 0; i < PKTBUFSRX; i++)
319 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN;
322 net_clear_handlers();
324 /* Only need to setup buffer pointers once. */
331 /**********************************************************************/
333 * Main network processing loop.
336 int NetLoop(enum proto_t protocol)
343 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
345 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
347 if (eth_is_on_demand_init() || protocol != NETCONS) {
356 eth_init_state_only();
359 #ifdef CONFIG_USB_KEYBOARD
362 net_set_state(NETLOOP_CONTINUE);
365 * Start the ball rolling with the given start function. From
366 * here on, this code is a state machine driven by received
367 * packets and timer events.
369 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n");
372 switch (net_check_prereq(protocol)) {
374 /* network not configured */
379 /* network device not configured */
384 net_boot_file_size = 0;
387 #ifdef CONFIG_CMD_TFTPPUT
390 /* always use ARP to get server ethernet address */
393 #ifdef CONFIG_CMD_TFTPSRV
398 #if defined(CONFIG_CMD_DHCP)
402 DhcpRequest(); /* Basically same as BOOTP */
412 #if defined(CONFIG_CMD_RARP)
419 #if defined(CONFIG_CMD_PING)
424 #if defined(CONFIG_CMD_NFS)
429 #if defined(CONFIG_CMD_CDP)
434 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
439 #if defined(CONFIG_CMD_SNTP)
444 #if defined(CONFIG_CMD_DNS)
449 #if defined(CONFIG_CMD_LINK_LOCAL)
454 #if defined(CONFIG_CMD_BOOTCE)
466 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
467 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
468 defined(CONFIG_STATUS_LED) && \
469 defined(STATUS_LED_RED)
471 * Echo the inverted link state to the fault LED.
473 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
474 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
476 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
477 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
478 #endif /* CONFIG_MII, ... */
479 #ifdef CONFIG_USB_KEYBOARD
484 * Main packet reception loop. Loop receiving packets until
485 * someone sets `net_state' to a state that terminates.
489 #ifdef CONFIG_SHOW_ACTIVITY
493 * Check the ethernet for a new packet. The ethernet
494 * receive routine will process it.
495 * Most drivers return the most recent packet size, but not
496 * errors that may have happened.
501 * Abort if ctrl-c was pressed.
504 /* cancel any ARP that may not have completed */
505 net_arp_wait_packet_ip.s_addr = 0;
509 /* Invalidate the last protocol */
510 eth_set_last_protocol(BOOTP);
513 /* include a debug print as well incase the debug
514 messages are directed to stderr */
515 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n");
522 * Check for a timeout, and run the timeout handler
525 if (timeHandler && ((get_timer(timeStart)) > timeDelta)) {
528 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
529 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
530 defined(CONFIG_STATUS_LED) && \
531 defined(STATUS_LED_RED)
533 * Echo the inverted link state to the fault LED.
535 if (miiphy_link(eth_get_dev()->name,
536 CONFIG_SYS_FAULT_MII_ADDR)) {
537 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
539 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
541 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
542 #endif /* CONFIG_MII, ... */
543 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n");
545 timeHandler = (thand_f *)0;
549 if (net_state == NETLOOP_FAIL)
550 ret = NetStartAgain();
554 case NETLOOP_RESTART:
558 case NETLOOP_SUCCESS:
560 if (net_boot_file_size > 0) {
561 printf("Bytes transferred = %d (%x hex)\n",
562 net_boot_file_size, net_boot_file_size);
563 setenv_hex("filesize", net_boot_file_size);
564 setenv_hex("fileaddr", load_addr);
566 if (protocol != NETCONS) {
569 eth_halt_state_only();
572 eth_set_last_protocol(protocol);
574 ret = net_boot_file_size;
575 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
580 /* Invalidate the last protocol */
581 eth_set_last_protocol(BOOTP);
582 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
585 case NETLOOP_CONTINUE:
591 #ifdef CONFIG_USB_KEYBOARD
594 #ifdef CONFIG_CMD_TFTPPUT
595 /* Clear out the handlers */
596 net_set_udp_handler(NULL);
597 net_set_icmp_handler(NULL);
602 /**********************************************************************/
605 startAgainTimeout(void)
607 net_set_state(NETLOOP_RESTART);
610 int NetStartAgain(void)
613 int retry_forever = 0;
614 unsigned long retrycnt = 0;
617 nretry = getenv("netretry");
619 if (!strcmp(nretry, "yes"))
621 else if (!strcmp(nretry, "no"))
623 else if (!strcmp(nretry, "once"))
626 retrycnt = simple_strtoul(nretry, NULL, 0);
632 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
634 net_set_state(NETLOOP_FAIL);
636 * We don't provide a way for the protocol to return an error,
637 * but this is almost always the reason.
645 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
646 eth_try_another(!NetRestarted);
649 if (NetRestartWrap) {
652 NetSetTimeout(10000UL, startAgainTimeout);
653 net_set_udp_handler(NULL);
655 net_set_state(NETLOOP_FAIL);
658 net_set_state(NETLOOP_RESTART);
663 /**********************************************************************/
668 static void dummy_handler(uchar *pkt, unsigned dport,
669 struct in_addr sip, unsigned sport,
674 rxhand_f *net_get_udp_handler(void)
676 return udp_packet_handler;
679 void net_set_udp_handler(rxhand_f *f)
681 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f);
683 udp_packet_handler = dummy_handler;
685 udp_packet_handler = f;
688 rxhand_f *net_get_arp_handler(void)
690 return arp_packet_handler;
693 void net_set_arp_handler(rxhand_f *f)
695 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f);
697 arp_packet_handler = dummy_handler;
699 arp_packet_handler = f;
702 #ifdef CONFIG_CMD_TFTPPUT
703 void net_set_icmp_handler(rxhand_icmp_f *f)
705 packet_icmp_handler = f;
710 NetSetTimeout(ulong iv, thand_f *f)
713 debug_cond(DEBUG_INT_STATE,
714 "--- NetLoop timeout handler cancelled\n");
715 timeHandler = (thand_f *)0;
717 debug_cond(DEBUG_INT_STATE,
718 "--- NetLoop timeout handler set (%p)\n", f);
720 timeStart = get_timer(0);
721 timeDelta = iv * CONFIG_SYS_HZ / 1000;
725 int NetSendUDPPacket(uchar *ether, struct in_addr dest, int dport, int sport,
732 /* make sure the NetTxPacket is initialized (NetInit() was called) */
733 assert(NetTxPacket != NULL);
734 if (NetTxPacket == NULL)
737 /* convert to new style broadcast */
738 if (dest.s_addr == 0)
739 dest.s_addr = 0xFFFFFFFF;
741 /* if broadcast, make the ether address a broadcast and don't do ARP */
742 if (dest.s_addr == 0xFFFFFFFF)
743 ether = NetBcastAddr;
745 pkt = (uchar *)NetTxPacket;
747 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
749 net_set_udp_header(pkt, dest, dport, sport, payload_len);
750 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
752 /* if MAC address was not discovered yet, do an ARP request */
753 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
754 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
756 /* save the ip and eth addr for the packet to send after arp */
757 net_arp_wait_packet_ip = dest;
758 NetArpWaitPacketMAC = ether;
760 /* size of the waiting packet */
761 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
763 /* and do the ARP request */
765 NetArpWaitTimerStart = get_timer(0);
767 return 1; /* waiting */
769 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
771 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
772 return 0; /* transmitted */
776 #ifdef CONFIG_IP_DEFRAG
778 * This function collects fragments in a single packet, according
779 * to the algorithm in RFC815. It returns NULL or the pointer to
780 * a complete packet, in static storage
782 #ifndef CONFIG_NET_MAXDEFRAG
783 #define CONFIG_NET_MAXDEFRAG 16384
786 * MAXDEFRAG, above, is chosen in the config file and is real data
787 * so we need to add the NFS overhead, which is more than TFTP.
788 * To use sizeof in the internal unnamed structures, we need a real
789 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
790 * The compiler doesn't complain nor allocates the actual structure
792 static struct rpc_t rpc_specimen;
793 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
795 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
798 * this is the packet being assembled, either data or frag control.
799 * Fragments go by 8 bytes, so this union must be 8 bytes long
802 /* first_byte is address of this structure */
803 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
804 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
805 u16 prev_hole; /* index of prev, 0 == none */
809 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
811 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
812 static u16 first_hole, total_len;
813 struct hole *payload, *thisfrag, *h, *newh;
814 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
815 uchar *indata = (uchar *)ip;
816 int offset8, start, len, done = 0;
817 u16 ip_off = ntohs(ip->ip_off);
819 /* payload starts after IP header, this fragment is in there */
820 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
821 offset8 = (ip_off & IP_OFFS);
822 thisfrag = payload + offset8;
824 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
826 if (start + len > IP_MAXUDP) /* fragment extends too far */
829 if (!total_len || localip->ip_id != ip->ip_id) {
830 /* new (or different) packet, reset structs */
832 payload[0].last_byte = ~0;
833 payload[0].next_hole = 0;
834 payload[0].prev_hole = 0;
836 /* any IP header will work, copy the first we received */
837 memcpy(localip, ip, IP_HDR_SIZE);
841 * What follows is the reassembly algorithm. We use the payload
842 * array as a linked list of hole descriptors, as each hole starts
843 * at a multiple of 8 bytes. However, last byte can be whatever value,
844 * so it is represented as byte count, not as 8-byte blocks.
847 h = payload + first_hole;
848 while (h->last_byte < start) {
850 /* no hole that far away */
853 h = payload + h->next_hole;
856 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
857 if (offset8 + ((len + 7) / 8) <= h - payload) {
858 /* no overlap with holes (dup fragment?) */
862 if (!(ip_off & IP_FLAGS_MFRAG)) {
863 /* no more fragmentss: truncate this (last) hole */
864 total_len = start + len;
865 h->last_byte = start + len;
869 * There is some overlap: fix the hole list. This code doesn't
870 * deal with a fragment that overlaps with two different holes
871 * (thus being a superset of a previously-received fragment).
874 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
875 /* complete overlap with hole: remove hole */
876 if (!h->prev_hole && !h->next_hole) {
877 /* last remaining hole */
879 } else if (!h->prev_hole) {
881 first_hole = h->next_hole;
882 payload[h->next_hole].prev_hole = 0;
883 } else if (!h->next_hole) {
885 payload[h->prev_hole].next_hole = 0;
887 /* in the middle of the list */
888 payload[h->next_hole].prev_hole = h->prev_hole;
889 payload[h->prev_hole].next_hole = h->next_hole;
892 } else if (h->last_byte <= start + len) {
893 /* overlaps with final part of the hole: shorten this hole */
894 h->last_byte = start;
896 } else if (h >= thisfrag) {
897 /* overlaps with initial part of the hole: move this hole */
898 newh = thisfrag + (len / 8);
902 payload[h->next_hole].prev_hole = (h - payload);
904 payload[h->prev_hole].next_hole = (h - payload);
906 first_hole = (h - payload);
909 /* fragment sits in the middle: split the hole */
910 newh = thisfrag + (len / 8);
912 h->last_byte = start;
913 h->next_hole = (newh - payload);
914 newh->prev_hole = (h - payload);
916 payload[newh->next_hole].prev_hole = (newh - payload);
919 /* finally copy this fragment and possibly return whole packet */
920 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
924 localip->ip_len = htons(total_len);
925 *lenp = total_len + IP_HDR_SIZE;
929 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
931 u16 ip_off = ntohs(ip->ip_off);
932 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
933 return ip; /* not a fragment */
934 return __NetDefragment(ip, lenp);
937 #else /* !CONFIG_IP_DEFRAG */
939 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
941 u16 ip_off = ntohs(ip->ip_off);
942 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
943 return ip; /* not a fragment */
949 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
952 * @parma ip IP packet containing the ICMP
954 static void receive_icmp(struct ip_udp_hdr *ip, int len,
955 struct in_addr src_ip, struct ethernet_hdr *et)
957 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
959 switch (icmph->type) {
961 if (icmph->code != ICMP_REDIR_HOST)
963 printf(" ICMP Host Redirect to %pI4 ",
967 #if defined(CONFIG_CMD_PING)
968 ping_receive(et, ip, len);
970 #ifdef CONFIG_CMD_TFTPPUT
971 if (packet_icmp_handler)
972 packet_icmp_handler(icmph->type, icmph->code,
973 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
974 icmph->un.data, ntohs(ip->udp_len));
980 void net_process_received_packet(uchar *in_packet, int len)
982 struct ethernet_hdr *et;
983 struct ip_udp_hdr *ip;
984 struct in_addr dst_ip;
985 struct in_addr src_ip;
987 #if defined(CONFIG_CMD_CDP)
990 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
992 debug_cond(DEBUG_NET_PKT, "packet received\n");
994 NetRxPacket = in_packet;
995 NetRxPacketLen = len;
996 et = (struct ethernet_hdr *)in_packet;
998 /* too small packet? */
999 if (len < ETHER_HDR_SIZE)
1004 (*push_packet)(in_packet, len);
1009 #if defined(CONFIG_CMD_CDP)
1010 /* keep track if packet is CDP */
1011 iscdp = is_cdp_packet(et->et_dest);
1014 myvlanid = ntohs(NetOurVLAN);
1015 if (myvlanid == (ushort)-1)
1016 myvlanid = VLAN_NONE;
1017 mynvlanid = ntohs(NetOurNativeVLAN);
1018 if (mynvlanid == (ushort)-1)
1019 mynvlanid = VLAN_NONE;
1021 eth_proto = ntohs(et->et_protlen);
1023 if (eth_proto < 1514) {
1024 struct e802_hdr *et802 = (struct e802_hdr *)et;
1026 * Got a 802.2 packet. Check the other protocol field.
1027 * XXX VLAN over 802.2+SNAP not implemented!
1029 eth_proto = ntohs(et802->et_prot);
1031 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1032 len -= E802_HDR_SIZE;
1034 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1035 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1036 len -= ETHER_HDR_SIZE;
1038 } else { /* VLAN packet */
1039 struct vlan_ethernet_hdr *vet =
1040 (struct vlan_ethernet_hdr *)et;
1042 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1044 /* too small packet? */
1045 if (len < VLAN_ETHER_HDR_SIZE)
1048 /* if no VLAN active */
1049 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1050 #if defined(CONFIG_CMD_CDP)
1056 cti = ntohs(vet->vet_tag);
1057 vlanid = cti & VLAN_IDMASK;
1058 eth_proto = ntohs(vet->vet_type);
1060 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1061 len -= VLAN_ETHER_HDR_SIZE;
1064 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1066 #if defined(CONFIG_CMD_CDP)
1068 cdp_receive((uchar *)ip, len);
1073 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1074 if (vlanid == VLAN_NONE)
1075 vlanid = (mynvlanid & VLAN_IDMASK);
1077 if (vlanid != (myvlanid & VLAN_IDMASK))
1081 switch (eth_proto) {
1084 ArpReceive(et, ip, len);
1087 #ifdef CONFIG_CMD_RARP
1089 rarp_receive(ip, len);
1093 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1094 /* Before we start poking the header, make sure it is there */
1095 if (len < IP_UDP_HDR_SIZE) {
1096 debug("len bad %d < %lu\n", len,
1097 (ulong)IP_UDP_HDR_SIZE);
1100 /* Check the packet length */
1101 if (len < ntohs(ip->ip_len)) {
1102 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1105 len = ntohs(ip->ip_len);
1106 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1107 len, ip->ip_hl_v & 0xff);
1109 /* Can't deal with anything except IPv4 */
1110 if ((ip->ip_hl_v & 0xf0) != 0x40)
1112 /* Can't deal with IP options (headers != 20 bytes) */
1113 if ((ip->ip_hl_v & 0x0f) > 0x05)
1115 /* Check the Checksum of the header */
1116 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1117 debug("checksum bad\n");
1120 /* If it is not for us, ignore it */
1121 dst_ip = net_read_ip(&ip->ip_dst);
1122 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1123 dst_ip.s_addr != 0xFFFFFFFF) {
1124 #ifdef CONFIG_MCAST_TFTP
1125 if (net_mcast_addr != dst_ip)
1129 /* Read source IP address for later use */
1130 src_ip = net_read_ip(&ip->ip_src);
1132 * The function returns the unchanged packet if it's not
1133 * a fragment, and either the complete packet or NULL if
1134 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1136 ip = NetDefragment(ip, &len);
1140 * watch for ICMP host redirects
1142 * There is no real handler code (yet). We just watch
1143 * for ICMP host redirect messages. In case anybody
1144 * sees these messages: please contact me
1145 * (wd@denx.de), or - even better - send me the
1146 * necessary fixes :-)
1148 * Note: in all cases where I have seen this so far
1149 * it was a problem with the router configuration,
1150 * for instance when a router was configured in the
1151 * BOOTP reply, but the TFTP server was on the same
1152 * subnet. So this is probably a warning that your
1153 * configuration might be wrong. But I'm not really
1154 * sure if there aren't any other situations.
1156 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1157 * we send a tftp packet to a dead connection, or when
1158 * there is no server at the other end.
1160 if (ip->ip_p == IPPROTO_ICMP) {
1161 receive_icmp(ip, len, src_ip, et);
1163 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1167 debug_cond(DEBUG_DEV_PKT,
1168 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1169 &dst_ip, &src_ip, len);
1171 #ifdef CONFIG_UDP_CHECKSUM
1172 if (ip->udp_xsum != 0) {
1178 xsum += (ntohs(ip->udp_len));
1179 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1180 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1181 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1182 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1184 sumlen = ntohs(ip->udp_len);
1185 sumptr = (ushort *) &(ip->udp_src);
1187 while (sumlen > 1) {
1190 sumdata = *sumptr++;
1191 xsum += ntohs(sumdata);
1197 sumdata = *(unsigned char *) sumptr;
1198 sumdata = (sumdata << 8) & 0xff00;
1201 while ((xsum >> 16) != 0) {
1202 xsum = (xsum & 0x0000ffff) +
1203 ((xsum >> 16) & 0x0000ffff);
1205 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1206 printf(" UDP wrong checksum %08lx %08x\n",
1207 xsum, ntohs(ip->udp_xsum));
1214 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1215 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1219 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1222 * IP header OK. Pass the packet to the current handler.
1224 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1228 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1234 /**********************************************************************/
1236 static int net_check_prereq(enum proto_t protocol)
1239 #if defined(CONFIG_CMD_PING)
1241 if (net_ping_ip.s_addr == 0) {
1242 puts("*** ERROR: ping address not given\n");
1247 #if defined(CONFIG_CMD_SNTP)
1249 if (net_ntp_server.s_addr == 0) {
1250 puts("*** ERROR: NTP server address not given\n");
1255 #if defined(CONFIG_CMD_DNS)
1257 if (net_dns_server.s_addr == 0) {
1258 puts("*** ERROR: DNS server address not given\n");
1263 #if defined(CONFIG_CMD_NFS)
1268 if (net_server_ip.s_addr == 0) {
1269 puts("*** ERROR: `serverip' not set\n");
1272 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1273 defined(CONFIG_CMD_DNS)
1281 if (net_ip.s_addr == 0) {
1282 puts("*** ERROR: `ipaddr' not set\n");
1287 #ifdef CONFIG_CMD_RARP
1294 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1295 int num = eth_get_dev_index();
1299 puts("*** ERROR: No ethernet found.\n");
1302 puts("*** ERROR: `ethaddr' not set\n");
1305 printf("*** ERROR: `eth%daddr' not set\n",
1319 /**********************************************************************/
1326 myvlanid = ntohs(NetOurVLAN);
1327 if (myvlanid == (ushort)-1)
1328 myvlanid = VLAN_NONE;
1330 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1331 VLAN_ETHER_HDR_SIZE;
1335 NetSetEther(uchar *xet, uchar * addr, uint prot)
1337 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1340 myvlanid = ntohs(NetOurVLAN);
1341 if (myvlanid == (ushort)-1)
1342 myvlanid = VLAN_NONE;
1344 memcpy(et->et_dest, addr, 6);
1345 memcpy(et->et_src, NetOurEther, 6);
1346 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1347 et->et_protlen = htons(prot);
1348 return ETHER_HDR_SIZE;
1350 struct vlan_ethernet_hdr *vet =
1351 (struct vlan_ethernet_hdr *)xet;
1353 vet->vet_vlan_type = htons(PROT_VLAN);
1354 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1355 vet->vet_type = htons(prot);
1356 return VLAN_ETHER_HDR_SIZE;
1360 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1364 memcpy(et->et_dest, addr, 6);
1365 memcpy(et->et_src, NetOurEther, 6);
1366 protlen = ntohs(et->et_protlen);
1367 if (protlen == PROT_VLAN) {
1368 struct vlan_ethernet_hdr *vet =
1369 (struct vlan_ethernet_hdr *)et;
1370 vet->vet_type = htons(prot);
1371 return VLAN_ETHER_HDR_SIZE;
1372 } else if (protlen > 1514) {
1373 et->et_protlen = htons(prot);
1374 return ETHER_HDR_SIZE;
1377 struct e802_hdr *et802 = (struct e802_hdr *)et;
1378 et802->et_prot = htons(prot);
1379 return E802_HDR_SIZE;
1383 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1385 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1388 * Construct an IP header.
1390 /* IP_HDR_SIZE / 4 (not including UDP) */
1393 ip->ip_len = htons(IP_HDR_SIZE);
1394 ip->ip_id = htons(NetIPID++);
1395 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1398 /* already in network byte order */
1399 net_copy_ip((void *)&ip->ip_src, &source);
1400 /* already in network byte order */
1401 net_copy_ip((void *)&ip->ip_dst, &dest);
1404 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1407 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1410 * If the data is an odd number of bytes, zero the
1411 * byte after the last byte so that the checksum
1415 pkt[IP_UDP_HDR_SIZE + len] = 0;
1417 net_set_ip_header(pkt, dest, net_ip);
1418 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1419 ip->ip_p = IPPROTO_UDP;
1420 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1422 ip->udp_src = htons(sport);
1423 ip->udp_dst = htons(dport);
1424 ip->udp_len = htons(UDP_HDR_SIZE + len);
1428 void copy_filename(char *dst, const char *src, int size)
1430 if (*src && (*src == '"')) {
1435 while ((--size > 0) && *src && (*src != '"'))
1440 #if defined(CONFIG_CMD_NFS) || \
1441 defined(CONFIG_CMD_SNTP) || \
1442 defined(CONFIG_CMD_DNS)
1444 * make port a little random (1024-17407)
1445 * This keeps the math somewhat trivial to compute, and seems to work with
1446 * all supported protocols/clients/servers
1448 unsigned int random_port(void)
1450 return 1024 + (get_timer(0) % 0x4000);
1454 void ip_to_string(struct in_addr x, char *s)
1456 x.s_addr = ntohl(x.s_addr);
1457 sprintf(s, "%d.%d.%d.%d",
1458 (int) ((x.s_addr >> 24) & 0xff),
1459 (int) ((x.s_addr >> 16) & 0xff),
1460 (int) ((x.s_addr >> 8) & 0xff),
1461 (int) ((x.s_addr >> 0) & 0xff)
1465 void VLAN_to_string(ushort x, char *s)
1469 if (x == (ushort)-1)
1475 sprintf(s, "%d", x & VLAN_IDMASK);
1478 ushort string_to_VLAN(const char *s)
1483 return htons(VLAN_NONE);
1485 if (*s < '0' || *s > '9')
1488 id = (ushort)simple_strtoul(s, NULL, 10);
1493 ushort getenv_VLAN(char *var)
1495 return string_to_VLAN(getenv(var));