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 */
133 /* Boot server enet address */
134 u8 net_server_ethaddr[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 */
140 uchar *net_rx_packet;
141 /* Current rx packet length */
142 int net_rx_packet_len;
144 static unsigned net_ip_id;
145 /* Ethernet bcast address */
146 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
147 const u8 net_null_ethaddr[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 */
154 int net_restart_wrap;
155 /* Network loop restarted */
156 static int net_restarted;
157 /* At least one device configured */
158 static int net_dev_exists;
160 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
161 /* default is without VLAN */
162 ushort net_our_vlan = 0xFFFF;
164 ushort net_native_vlan = 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 */
177 int net_ntp_time_offset;
180 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
181 /* Receive packets */
182 uchar *net_rx_packets[PKTBUFSRX];
183 /* Current UDP RX packet handler */
184 static rxhand_f *udp_packet_handler;
185 /* Current ARP RX packet handler */
186 static rxhand_f *arp_packet_handler;
187 #ifdef CONFIG_CMD_TFTPPUT
188 /* Current ICMP rx handler */
189 static rxhand_icmp_f *packet_icmp_handler;
191 /* Current timeout handler */
192 static thand_f *time_handler;
193 /* Time base value */
194 static ulong time_start;
195 /* Current timeout value */
196 static ulong time_delta;
197 /* THE transmit packet */
198 uchar *net_tx_packet;
200 static int net_check_prereq(enum proto_t protocol);
202 static int net_try_count;
204 int __maybe_unused net_busy_flag;
206 /**********************************************************************/
208 static int on_bootfile(const char *name, const char *value, enum env_op op,
213 case env_op_overwrite:
214 copy_filename(net_boot_file_name, value,
215 sizeof(net_boot_file_name));
223 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
226 * Check if autoload is enabled. If so, use either NFS or TFTP to download
229 void net_auto_load(void)
231 #if defined(CONFIG_CMD_NFS)
232 const char *s = getenv("autoload");
234 if (s != NULL && strcmp(s, "NFS") == 0) {
236 * Use NFS to load the bootfile.
242 if (getenv_yesno("autoload") == 0) {
244 * Just use BOOTP/RARP to configure system;
245 * Do not use TFTP to load the bootfile.
247 net_set_state(NETLOOP_SUCCESS);
253 static void net_init_loop(void)
255 static int env_changed_id;
256 int env_id = get_env_id();
258 /* update only when the environment has changed */
259 if (env_changed_id != env_id) {
260 net_ip = getenv_ip("ipaddr");
261 net_gateway = getenv_ip("gatewayip");
262 net_netmask = getenv_ip("netmask");
263 net_server_ip = getenv_ip("serverip");
264 net_native_vlan = getenv_vlan("nvlan");
265 net_our_vlan = getenv_vlan("vlan");
266 #if defined(CONFIG_CMD_DNS)
267 net_dns_server = getenv_ip("dnsip");
269 env_changed_id = env_id;
272 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
277 static void net_clear_handlers(void)
279 net_set_udp_handler(NULL);
280 net_set_arp_handler(NULL);
281 net_set_timeout_handler(0, NULL);
284 static void net_cleanup_loop(void)
286 net_clear_handlers();
291 static int first_call = 1;
295 * Setup packet buffers, aligned correctly.
299 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
300 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
301 for (i = 0; i < PKTBUFSRX; i++) {
302 net_rx_packets[i] = net_tx_packet +
303 (i + 1) * PKTSIZE_ALIGN;
306 net_clear_handlers();
308 /* Only need to setup buffer pointers once. */
315 /**********************************************************************/
317 * Main network processing loop.
320 int net_loop(enum proto_t protocol)
327 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
329 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
331 if (eth_is_on_demand_init() || protocol != NETCONS) {
340 eth_init_state_only();
343 #ifdef CONFIG_USB_KEYBOARD
346 net_set_state(NETLOOP_CONTINUE);
349 * Start the ball rolling with the given start function. From
350 * here on, this code is a state machine driven by received
351 * packets and timer events.
353 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
356 switch (net_check_prereq(protocol)) {
358 /* network not configured */
363 /* network device not configured */
368 net_boot_file_size = 0;
371 #ifdef CONFIG_CMD_TFTPPUT
374 /* always use ARP to get server ethernet address */
375 tftp_start(protocol);
377 #ifdef CONFIG_CMD_TFTPSRV
382 #if defined(CONFIG_CMD_DHCP)
386 dhcp_request(); /* Basically same as BOOTP */
396 #if defined(CONFIG_CMD_RARP)
403 #if defined(CONFIG_CMD_PING)
408 #if defined(CONFIG_CMD_NFS)
413 #if defined(CONFIG_CMD_CDP)
418 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
423 #if defined(CONFIG_CMD_SNTP)
428 #if defined(CONFIG_CMD_DNS)
433 #if defined(CONFIG_CMD_LINK_LOCAL)
438 #if defined(CONFIG_CMD_BOOTCE)
450 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
451 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
452 defined(CONFIG_STATUS_LED) && \
453 defined(STATUS_LED_RED)
455 * Echo the inverted link state to the fault LED.
457 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
458 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
460 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
462 #endif /* CONFIG_MII, ... */
463 #ifdef CONFIG_USB_KEYBOARD
468 * Main packet reception loop. Loop receiving packets until
469 * someone sets `net_state' to a state that terminates.
473 #ifdef CONFIG_SHOW_ACTIVITY
477 * Check the ethernet for a new packet. The ethernet
478 * receive routine will process it.
479 * Most drivers return the most recent packet size, but not
480 * errors that may have happened.
485 * Abort if ctrl-c was pressed.
488 /* cancel any ARP that may not have completed */
489 net_arp_wait_packet_ip.s_addr = 0;
493 /* Invalidate the last protocol */
494 eth_set_last_protocol(BOOTP);
497 /* include a debug print as well incase the debug
498 messages are directed to stderr */
499 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
506 * Check for a timeout, and run the timeout handler
510 (get_timer(time_start) > time_delta)) {
513 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
514 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
515 defined(CONFIG_STATUS_LED) && \
516 defined(STATUS_LED_RED)
518 * Echo the inverted link state to the fault LED.
520 if (miiphy_link(eth_get_dev()->name,
521 CONFIG_SYS_FAULT_MII_ADDR))
522 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
524 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
525 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
526 #endif /* CONFIG_MII, ... */
527 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
529 time_handler = (thand_f *)0;
533 if (net_state == NETLOOP_FAIL)
534 ret = net_start_again();
537 case NETLOOP_RESTART:
541 case NETLOOP_SUCCESS:
543 if (net_boot_file_size > 0) {
544 printf("Bytes transferred = %d (%x hex)\n",
545 net_boot_file_size, net_boot_file_size);
546 setenv_hex("filesize", net_boot_file_size);
547 setenv_hex("fileaddr", load_addr);
549 if (protocol != NETCONS)
552 eth_halt_state_only();
554 eth_set_last_protocol(protocol);
556 ret = net_boot_file_size;
557 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
562 /* Invalidate the last protocol */
563 eth_set_last_protocol(BOOTP);
564 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
567 case NETLOOP_CONTINUE:
573 #ifdef CONFIG_USB_KEYBOARD
576 #ifdef CONFIG_CMD_TFTPPUT
577 /* Clear out the handlers */
578 net_set_udp_handler(NULL);
579 net_set_icmp_handler(NULL);
584 /**********************************************************************/
586 static void start_again_timeout_handler(void)
588 net_set_state(NETLOOP_RESTART);
591 int net_start_again(void)
594 int retry_forever = 0;
595 unsigned long retrycnt = 0;
598 nretry = getenv("netretry");
600 if (!strcmp(nretry, "yes"))
602 else if (!strcmp(nretry, "no"))
604 else if (!strcmp(nretry, "once"))
607 retrycnt = simple_strtoul(nretry, NULL, 0);
613 if ((!retry_forever) && (net_try_count >= retrycnt)) {
615 net_set_state(NETLOOP_FAIL);
617 * We don't provide a way for the protocol to return an error,
618 * but this is almost always the reason.
626 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
627 eth_try_another(!net_restarted);
630 if (net_restart_wrap) {
631 net_restart_wrap = 0;
632 if (net_dev_exists) {
633 net_set_timeout_handler(10000UL,
634 start_again_timeout_handler);
635 net_set_udp_handler(NULL);
637 net_set_state(NETLOOP_FAIL);
640 net_set_state(NETLOOP_RESTART);
645 /**********************************************************************/
650 static void dummy_handler(uchar *pkt, unsigned dport,
651 struct in_addr sip, unsigned sport,
656 rxhand_f *net_get_udp_handler(void)
658 return udp_packet_handler;
661 void net_set_udp_handler(rxhand_f *f)
663 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
665 udp_packet_handler = dummy_handler;
667 udp_packet_handler = f;
670 rxhand_f *net_get_arp_handler(void)
672 return arp_packet_handler;
675 void net_set_arp_handler(rxhand_f *f)
677 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
679 arp_packet_handler = dummy_handler;
681 arp_packet_handler = f;
684 #ifdef CONFIG_CMD_TFTPPUT
685 void net_set_icmp_handler(rxhand_icmp_f *f)
687 packet_icmp_handler = f;
691 void net_set_timeout_handler(ulong iv, thand_f *f)
694 debug_cond(DEBUG_INT_STATE,
695 "--- net_loop timeout handler cancelled\n");
696 time_handler = (thand_f *)0;
698 debug_cond(DEBUG_INT_STATE,
699 "--- net_loop timeout handler set (%p)\n", f);
701 time_start = get_timer(0);
702 time_delta = iv * CONFIG_SYS_HZ / 1000;
706 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
713 /* make sure the net_tx_packet is initialized (net_init() was called) */
714 assert(net_tx_packet != NULL);
715 if (net_tx_packet == NULL)
718 /* convert to new style broadcast */
719 if (dest.s_addr == 0)
720 dest.s_addr = 0xFFFFFFFF;
722 /* if broadcast, make the ether address a broadcast and don't do ARP */
723 if (dest.s_addr == 0xFFFFFFFF)
724 ether = (uchar *)net_bcast_ethaddr;
726 pkt = (uchar *)net_tx_packet;
728 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
730 net_set_udp_header(pkt, dest, dport, sport, payload_len);
731 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
733 /* if MAC address was not discovered yet, do an ARP request */
734 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
735 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
737 /* save the ip and eth addr for the packet to send after arp */
738 net_arp_wait_packet_ip = dest;
739 arp_wait_packet_ethaddr = ether;
741 /* size of the waiting packet */
742 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
744 /* and do the ARP request */
746 arp_wait_timer_start = get_timer(0);
748 return 1; /* waiting */
750 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
752 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
753 return 0; /* transmitted */
757 #ifdef CONFIG_IP_DEFRAG
759 * This function collects fragments in a single packet, according
760 * to the algorithm in RFC815. It returns NULL or the pointer to
761 * a complete packet, in static storage
763 #ifndef CONFIG_NET_MAXDEFRAG
764 #define CONFIG_NET_MAXDEFRAG 16384
767 * MAXDEFRAG, above, is chosen in the config file and is real data
768 * so we need to add the NFS overhead, which is more than TFTP.
769 * To use sizeof in the internal unnamed structures, we need a real
770 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
771 * The compiler doesn't complain nor allocates the actual structure
773 static struct rpc_t rpc_specimen;
774 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
776 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
779 * this is the packet being assembled, either data or frag control.
780 * Fragments go by 8 bytes, so this union must be 8 bytes long
783 /* first_byte is address of this structure */
784 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
785 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
786 u16 prev_hole; /* index of prev, 0 == none */
790 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
792 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
793 static u16 first_hole, total_len;
794 struct hole *payload, *thisfrag, *h, *newh;
795 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
796 uchar *indata = (uchar *)ip;
797 int offset8, start, len, done = 0;
798 u16 ip_off = ntohs(ip->ip_off);
800 /* payload starts after IP header, this fragment is in there */
801 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
802 offset8 = (ip_off & IP_OFFS);
803 thisfrag = payload + offset8;
805 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
807 if (start + len > IP_MAXUDP) /* fragment extends too far */
810 if (!total_len || localip->ip_id != ip->ip_id) {
811 /* new (or different) packet, reset structs */
813 payload[0].last_byte = ~0;
814 payload[0].next_hole = 0;
815 payload[0].prev_hole = 0;
817 /* any IP header will work, copy the first we received */
818 memcpy(localip, ip, IP_HDR_SIZE);
822 * What follows is the reassembly algorithm. We use the payload
823 * array as a linked list of hole descriptors, as each hole starts
824 * at a multiple of 8 bytes. However, last byte can be whatever value,
825 * so it is represented as byte count, not as 8-byte blocks.
828 h = payload + first_hole;
829 while (h->last_byte < start) {
831 /* no hole that far away */
834 h = payload + h->next_hole;
837 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
838 if (offset8 + ((len + 7) / 8) <= h - payload) {
839 /* no overlap with holes (dup fragment?) */
843 if (!(ip_off & IP_FLAGS_MFRAG)) {
844 /* no more fragmentss: truncate this (last) hole */
845 total_len = start + len;
846 h->last_byte = start + len;
850 * There is some overlap: fix the hole list. This code doesn't
851 * deal with a fragment that overlaps with two different holes
852 * (thus being a superset of a previously-received fragment).
855 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
856 /* complete overlap with hole: remove hole */
857 if (!h->prev_hole && !h->next_hole) {
858 /* last remaining hole */
860 } else if (!h->prev_hole) {
862 first_hole = h->next_hole;
863 payload[h->next_hole].prev_hole = 0;
864 } else if (!h->next_hole) {
866 payload[h->prev_hole].next_hole = 0;
868 /* in the middle of the list */
869 payload[h->next_hole].prev_hole = h->prev_hole;
870 payload[h->prev_hole].next_hole = h->next_hole;
873 } else if (h->last_byte <= start + len) {
874 /* overlaps with final part of the hole: shorten this hole */
875 h->last_byte = start;
877 } else if (h >= thisfrag) {
878 /* overlaps with initial part of the hole: move this hole */
879 newh = thisfrag + (len / 8);
883 payload[h->next_hole].prev_hole = (h - payload);
885 payload[h->prev_hole].next_hole = (h - payload);
887 first_hole = (h - payload);
890 /* fragment sits in the middle: split the hole */
891 newh = thisfrag + (len / 8);
893 h->last_byte = start;
894 h->next_hole = (newh - payload);
895 newh->prev_hole = (h - payload);
897 payload[newh->next_hole].prev_hole = (newh - payload);
900 /* finally copy this fragment and possibly return whole packet */
901 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
905 localip->ip_len = htons(total_len);
906 *lenp = total_len + IP_HDR_SIZE;
910 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
913 u16 ip_off = ntohs(ip->ip_off);
914 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
915 return ip; /* not a fragment */
916 return __net_defragment(ip, lenp);
919 #else /* !CONFIG_IP_DEFRAG */
921 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
924 u16 ip_off = ntohs(ip->ip_off);
925 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
926 return ip; /* not a fragment */
932 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
935 * @parma ip IP packet containing the ICMP
937 static void receive_icmp(struct ip_udp_hdr *ip, int len,
938 struct in_addr src_ip, struct ethernet_hdr *et)
940 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
942 switch (icmph->type) {
944 if (icmph->code != ICMP_REDIR_HOST)
946 printf(" ICMP Host Redirect to %pI4 ",
950 #if defined(CONFIG_CMD_PING)
951 ping_receive(et, ip, len);
953 #ifdef CONFIG_CMD_TFTPPUT
954 if (packet_icmp_handler)
955 packet_icmp_handler(icmph->type, icmph->code,
956 ntohs(ip->udp_dst), src_ip,
957 ntohs(ip->udp_src), icmph->un.data,
964 void net_process_received_packet(uchar *in_packet, int len)
966 struct ethernet_hdr *et;
967 struct ip_udp_hdr *ip;
968 struct in_addr dst_ip;
969 struct in_addr src_ip;
971 #if defined(CONFIG_CMD_CDP)
974 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
976 debug_cond(DEBUG_NET_PKT, "packet received\n");
978 net_rx_packet = in_packet;
979 net_rx_packet_len = len;
980 et = (struct ethernet_hdr *)in_packet;
982 /* too small packet? */
983 if (len < ETHER_HDR_SIZE)
988 (*push_packet)(in_packet, len);
993 #if defined(CONFIG_CMD_CDP)
994 /* keep track if packet is CDP */
995 iscdp = is_cdp_packet(et->et_dest);
998 myvlanid = ntohs(net_our_vlan);
999 if (myvlanid == (ushort)-1)
1000 myvlanid = VLAN_NONE;
1001 mynvlanid = ntohs(net_native_vlan);
1002 if (mynvlanid == (ushort)-1)
1003 mynvlanid = VLAN_NONE;
1005 eth_proto = ntohs(et->et_protlen);
1007 if (eth_proto < 1514) {
1008 struct e802_hdr *et802 = (struct e802_hdr *)et;
1010 * Got a 802.2 packet. Check the other protocol field.
1011 * XXX VLAN over 802.2+SNAP not implemented!
1013 eth_proto = ntohs(et802->et_prot);
1015 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1016 len -= E802_HDR_SIZE;
1018 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1019 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1020 len -= ETHER_HDR_SIZE;
1022 } else { /* VLAN packet */
1023 struct vlan_ethernet_hdr *vet =
1024 (struct vlan_ethernet_hdr *)et;
1026 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1028 /* too small packet? */
1029 if (len < VLAN_ETHER_HDR_SIZE)
1032 /* if no VLAN active */
1033 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1034 #if defined(CONFIG_CMD_CDP)
1040 cti = ntohs(vet->vet_tag);
1041 vlanid = cti & VLAN_IDMASK;
1042 eth_proto = ntohs(vet->vet_type);
1044 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1045 len -= VLAN_ETHER_HDR_SIZE;
1048 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1050 #if defined(CONFIG_CMD_CDP)
1052 cdp_receive((uchar *)ip, len);
1057 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1058 if (vlanid == VLAN_NONE)
1059 vlanid = (mynvlanid & VLAN_IDMASK);
1061 if (vlanid != (myvlanid & VLAN_IDMASK))
1065 switch (eth_proto) {
1067 arp_receive(et, ip, len);
1070 #ifdef CONFIG_CMD_RARP
1072 rarp_receive(ip, len);
1076 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1077 /* Before we start poking the header, make sure it is there */
1078 if (len < IP_UDP_HDR_SIZE) {
1079 debug("len bad %d < %lu\n", len,
1080 (ulong)IP_UDP_HDR_SIZE);
1083 /* Check the packet length */
1084 if (len < ntohs(ip->ip_len)) {
1085 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1088 len = ntohs(ip->ip_len);
1089 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1090 len, ip->ip_hl_v & 0xff);
1092 /* Can't deal with anything except IPv4 */
1093 if ((ip->ip_hl_v & 0xf0) != 0x40)
1095 /* Can't deal with IP options (headers != 20 bytes) */
1096 if ((ip->ip_hl_v & 0x0f) > 0x05)
1098 /* Check the Checksum of the header */
1099 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1100 debug("checksum bad\n");
1103 /* If it is not for us, ignore it */
1104 dst_ip = net_read_ip(&ip->ip_dst);
1105 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1106 dst_ip.s_addr != 0xFFFFFFFF) {
1107 #ifdef CONFIG_MCAST_TFTP
1108 if (net_mcast_addr != dst_ip)
1112 /* Read source IP address for later use */
1113 src_ip = net_read_ip(&ip->ip_src);
1115 * The function returns the unchanged packet if it's not
1116 * a fragment, and either the complete packet or NULL if
1117 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1119 ip = net_defragment(ip, &len);
1123 * watch for ICMP host redirects
1125 * There is no real handler code (yet). We just watch
1126 * for ICMP host redirect messages. In case anybody
1127 * sees these messages: please contact me
1128 * (wd@denx.de), or - even better - send me the
1129 * necessary fixes :-)
1131 * Note: in all cases where I have seen this so far
1132 * it was a problem with the router configuration,
1133 * for instance when a router was configured in the
1134 * BOOTP reply, but the TFTP server was on the same
1135 * subnet. So this is probably a warning that your
1136 * configuration might be wrong. But I'm not really
1137 * sure if there aren't any other situations.
1139 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1140 * we send a tftp packet to a dead connection, or when
1141 * there is no server at the other end.
1143 if (ip->ip_p == IPPROTO_ICMP) {
1144 receive_icmp(ip, len, src_ip, et);
1146 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1150 debug_cond(DEBUG_DEV_PKT,
1151 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1152 &dst_ip, &src_ip, len);
1154 #ifdef CONFIG_UDP_CHECKSUM
1155 if (ip->udp_xsum != 0) {
1161 xsum += (ntohs(ip->udp_len));
1162 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1163 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1164 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1165 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1167 sumlen = ntohs(ip->udp_len);
1168 sumptr = (ushort *)&(ip->udp_src);
1170 while (sumlen > 1) {
1173 sumdata = *sumptr++;
1174 xsum += ntohs(sumdata);
1180 sumdata = *(unsigned char *)sumptr;
1181 sumdata = (sumdata << 8) & 0xff00;
1184 while ((xsum >> 16) != 0) {
1185 xsum = (xsum & 0x0000ffff) +
1186 ((xsum >> 16) & 0x0000ffff);
1188 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1189 printf(" UDP wrong checksum %08lx %08x\n",
1190 xsum, ntohs(ip->udp_xsum));
1196 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1197 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1201 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1204 * IP header OK. Pass the packet to the current handler.
1206 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1210 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1215 /**********************************************************************/
1217 static int net_check_prereq(enum proto_t protocol)
1220 #if defined(CONFIG_CMD_PING)
1222 if (net_ping_ip.s_addr == 0) {
1223 puts("*** ERROR: ping address not given\n");
1228 #if defined(CONFIG_CMD_SNTP)
1230 if (net_ntp_server.s_addr == 0) {
1231 puts("*** ERROR: NTP server address not given\n");
1236 #if defined(CONFIG_CMD_DNS)
1238 if (net_dns_server.s_addr == 0) {
1239 puts("*** ERROR: DNS server address not given\n");
1244 #if defined(CONFIG_CMD_NFS)
1250 if (net_server_ip.s_addr == 0) {
1251 puts("*** ERROR: `serverip' not set\n");
1254 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1255 defined(CONFIG_CMD_DNS)
1263 if (net_ip.s_addr == 0) {
1264 puts("*** ERROR: `ipaddr' not set\n");
1269 #ifdef CONFIG_CMD_RARP
1276 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1277 int num = eth_get_dev_index();
1281 puts("*** ERROR: No ethernet found.\n");
1284 puts("*** ERROR: `ethaddr' not set\n");
1287 printf("*** ERROR: `eth%daddr' not set\n",
1301 /**********************************************************************/
1304 net_eth_hdr_size(void)
1308 myvlanid = ntohs(net_our_vlan);
1309 if (myvlanid == (ushort)-1)
1310 myvlanid = VLAN_NONE;
1312 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1313 VLAN_ETHER_HDR_SIZE;
1316 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1318 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1321 myvlanid = ntohs(net_our_vlan);
1322 if (myvlanid == (ushort)-1)
1323 myvlanid = VLAN_NONE;
1325 memcpy(et->et_dest, dest_ethaddr, 6);
1326 memcpy(et->et_src, net_ethaddr, 6);
1327 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1328 et->et_protlen = htons(prot);
1329 return ETHER_HDR_SIZE;
1331 struct vlan_ethernet_hdr *vet =
1332 (struct vlan_ethernet_hdr *)xet;
1334 vet->vet_vlan_type = htons(PROT_VLAN);
1335 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1336 vet->vet_type = htons(prot);
1337 return VLAN_ETHER_HDR_SIZE;
1341 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1345 memcpy(et->et_dest, addr, 6);
1346 memcpy(et->et_src, net_ethaddr, 6);
1347 protlen = ntohs(et->et_protlen);
1348 if (protlen == PROT_VLAN) {
1349 struct vlan_ethernet_hdr *vet =
1350 (struct vlan_ethernet_hdr *)et;
1351 vet->vet_type = htons(prot);
1352 return VLAN_ETHER_HDR_SIZE;
1353 } else if (protlen > 1514) {
1354 et->et_protlen = htons(prot);
1355 return ETHER_HDR_SIZE;
1358 struct e802_hdr *et802 = (struct e802_hdr *)et;
1359 et802->et_prot = htons(prot);
1360 return E802_HDR_SIZE;
1364 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1366 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1369 * Construct an IP header.
1371 /* IP_HDR_SIZE / 4 (not including UDP) */
1374 ip->ip_len = htons(IP_HDR_SIZE);
1375 ip->ip_id = htons(net_ip_id++);
1376 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1379 /* already in network byte order */
1380 net_copy_ip((void *)&ip->ip_src, &source);
1381 /* already in network byte order */
1382 net_copy_ip((void *)&ip->ip_dst, &dest);
1385 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1388 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1391 * If the data is an odd number of bytes, zero the
1392 * byte after the last byte so that the checksum
1396 pkt[IP_UDP_HDR_SIZE + len] = 0;
1398 net_set_ip_header(pkt, dest, net_ip);
1399 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1400 ip->ip_p = IPPROTO_UDP;
1401 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1403 ip->udp_src = htons(sport);
1404 ip->udp_dst = htons(dport);
1405 ip->udp_len = htons(UDP_HDR_SIZE + len);
1409 void copy_filename(char *dst, const char *src, int size)
1411 if (*src && (*src == '"')) {
1416 while ((--size > 0) && *src && (*src != '"'))
1421 #if defined(CONFIG_CMD_NFS) || \
1422 defined(CONFIG_CMD_SNTP) || \
1423 defined(CONFIG_CMD_DNS)
1425 * make port a little random (1024-17407)
1426 * This keeps the math somewhat trivial to compute, and seems to work with
1427 * all supported protocols/clients/servers
1429 unsigned int random_port(void)
1431 return 1024 + (get_timer(0) % 0x4000);
1435 void ip_to_string(struct in_addr x, char *s)
1437 x.s_addr = ntohl(x.s_addr);
1438 sprintf(s, "%d.%d.%d.%d",
1439 (int) ((x.s_addr >> 24) & 0xff),
1440 (int) ((x.s_addr >> 16) & 0xff),
1441 (int) ((x.s_addr >> 8) & 0xff),
1442 (int) ((x.s_addr >> 0) & 0xff)
1446 void vlan_to_string(ushort x, char *s)
1450 if (x == (ushort)-1)
1456 sprintf(s, "%d", x & VLAN_IDMASK);
1459 ushort string_to_vlan(const char *s)
1464 return htons(VLAN_NONE);
1466 if (*s < '0' || *s > '9')
1469 id = (ushort)simple_strtoul(s, NULL, 10);
1474 ushort getenv_vlan(char *var)
1476 return string_to_vlan(getenv(var));