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
87 #include <environment.h>
91 #if defined(CONFIG_STATUS_LED)
93 #include <status_led.h>
96 #include <linux/compiler.h>
100 #if defined(CONFIG_CMD_DNS)
103 #include "link_local.h"
107 #if defined(CONFIG_CMD_SNTP)
111 DECLARE_GLOBAL_DATA_PTR;
113 /** BOOTP EXTENTIONS **/
115 /* Our subnet mask (0=unknown) */
116 struct in_addr net_netmask;
117 /* Our gateways IP address */
118 struct in_addr net_gateway;
119 /* Our DNS IP address */
120 struct in_addr net_dns_server;
121 #if defined(CONFIG_BOOTP_DNS2)
122 /* Our 2nd DNS IP address */
123 struct in_addr net_dns_server2;
126 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
127 struct in_addr net_mcast_addr;
130 /** END OF BOOTP EXTENTIONS **/
132 /* Our ethernet address */
134 /* Boot server enet address */
135 u8 net_server_ethaddr[6];
136 /* Our IP addr (0 = unknown) */
137 struct in_addr net_ip;
138 /* Server IP addr (0 = unknown) */
139 struct in_addr net_server_ip;
140 /* Current receive packet */
141 uchar *net_rx_packet;
142 /* Current rx packet length */
143 int net_rx_packet_len;
145 static unsigned net_ip_id;
146 /* Ethernet bcast address */
147 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
148 const u8 net_null_ethaddr[6];
149 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
150 void (*push_packet)(void *, int len) = 0;
152 /* Network loop state */
153 enum net_loop_state net_state;
154 /* Tried all network devices */
155 int net_restart_wrap;
156 /* Network loop restarted */
157 static int net_restarted;
158 /* At least one device configured */
159 static int net_dev_exists;
161 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
162 /* default is without VLAN */
163 ushort net_our_vlan = 0xFFFF;
165 ushort net_native_vlan = 0xFFFF;
168 char net_boot_file_name[1024];
169 /* The actual transferred size of the bootfile (in bytes) */
170 u32 net_boot_file_size;
171 /* Boot file size in blocks as reported by the DHCP server */
172 u32 net_boot_file_expected_size_in_blocks;
174 #if defined(CONFIG_CMD_SNTP)
175 /* NTP server IP address */
176 struct in_addr net_ntp_server;
177 /* offset time from UTC */
178 int net_ntp_time_offset;
181 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
182 /* Receive packets */
183 uchar *net_rx_packets[PKTBUFSRX];
184 /* Current UDP RX packet handler */
185 static rxhand_f *udp_packet_handler;
186 /* Current ARP RX packet handler */
187 static rxhand_f *arp_packet_handler;
188 #ifdef CONFIG_CMD_TFTPPUT
189 /* Current ICMP rx handler */
190 static rxhand_icmp_f *packet_icmp_handler;
192 /* Current timeout handler */
193 static thand_f *time_handler;
194 /* Time base value */
195 static ulong time_start;
196 /* Current timeout value */
197 static ulong time_delta;
198 /* THE transmit packet */
199 uchar *net_tx_packet;
201 static int net_check_prereq(enum proto_t protocol);
203 static int net_try_count;
205 int __maybe_unused net_busy_flag;
207 /**********************************************************************/
209 static int on_bootfile(const char *name, const char *value, enum env_op op,
212 if (flags & H_PROGRAMMATIC)
217 case env_op_overwrite:
218 copy_filename(net_boot_file_name, value,
219 sizeof(net_boot_file_name));
227 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
229 static int on_ipaddr(const char *name, const char *value, enum env_op op,
232 if (flags & H_PROGRAMMATIC)
235 net_ip = string_to_ip(value);
239 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
241 static int on_gatewayip(const char *name, const char *value, enum env_op op,
244 if (flags & H_PROGRAMMATIC)
247 net_gateway = string_to_ip(value);
251 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
253 static int on_netmask(const char *name, const char *value, enum env_op op,
256 if (flags & H_PROGRAMMATIC)
259 net_netmask = string_to_ip(value);
263 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
265 static int on_serverip(const char *name, const char *value, enum env_op op,
268 if (flags & H_PROGRAMMATIC)
271 net_server_ip = string_to_ip(value);
275 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
277 static int on_nvlan(const char *name, const char *value, enum env_op op,
280 if (flags & H_PROGRAMMATIC)
283 net_native_vlan = string_to_vlan(value);
287 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
289 static int on_vlan(const char *name, const char *value, enum env_op op,
292 if (flags & H_PROGRAMMATIC)
295 net_our_vlan = string_to_vlan(value);
299 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
301 #if defined(CONFIG_CMD_DNS)
302 static int on_dnsip(const char *name, const char *value, enum env_op op,
305 if (flags & H_PROGRAMMATIC)
308 net_dns_server = string_to_ip(value);
312 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
316 * Check if autoload is enabled. If so, use either NFS or TFTP to download
319 void net_auto_load(void)
321 #if defined(CONFIG_CMD_NFS)
322 const char *s = getenv("autoload");
324 if (s != NULL && strcmp(s, "NFS") == 0) {
326 * Use NFS to load the bootfile.
332 if (getenv_yesno("autoload") == 0) {
334 * Just use BOOTP/RARP to configure system;
335 * Do not use TFTP to load the bootfile.
337 net_set_state(NETLOOP_SUCCESS);
343 static void net_init_loop(void)
346 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
351 static void net_clear_handlers(void)
353 net_set_udp_handler(NULL);
354 net_set_arp_handler(NULL);
355 net_set_timeout_handler(0, NULL);
358 static void net_cleanup_loop(void)
360 net_clear_handlers();
365 static int first_call = 1;
369 * Setup packet buffers, aligned correctly.
373 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
374 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
375 for (i = 0; i < PKTBUFSRX; i++) {
376 net_rx_packets[i] = net_tx_packet +
377 (i + 1) * PKTSIZE_ALIGN;
380 net_clear_handlers();
382 /* Only need to setup buffer pointers once. */
389 /**********************************************************************/
391 * Main network processing loop.
394 int net_loop(enum proto_t protocol)
401 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
403 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
405 if (eth_is_on_demand_init() || protocol != NETCONS) {
414 eth_init_state_only();
417 #ifdef CONFIG_USB_KEYBOARD
420 net_set_state(NETLOOP_CONTINUE);
423 * Start the ball rolling with the given start function. From
424 * here on, this code is a state machine driven by received
425 * packets and timer events.
427 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
430 switch (net_check_prereq(protocol)) {
432 /* network not configured */
437 /* network device not configured */
442 net_boot_file_size = 0;
445 #ifdef CONFIG_CMD_TFTPPUT
448 /* always use ARP to get server ethernet address */
449 tftp_start(protocol);
451 #ifdef CONFIG_CMD_TFTPSRV
456 #if defined(CONFIG_CMD_DHCP)
460 dhcp_request(); /* Basically same as BOOTP */
470 #if defined(CONFIG_CMD_RARP)
477 #if defined(CONFIG_CMD_PING)
482 #if defined(CONFIG_CMD_NFS)
487 #if defined(CONFIG_CMD_CDP)
492 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
497 #if defined(CONFIG_CMD_SNTP)
502 #if defined(CONFIG_CMD_DNS)
507 #if defined(CONFIG_CMD_LINK_LOCAL)
519 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
520 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
521 defined(CONFIG_STATUS_LED) && \
522 defined(STATUS_LED_RED)
524 * Echo the inverted link state to the fault LED.
526 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
527 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
529 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
530 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
531 #endif /* CONFIG_MII, ... */
532 #ifdef CONFIG_USB_KEYBOARD
537 * Main packet reception loop. Loop receiving packets until
538 * someone sets `net_state' to a state that terminates.
542 #ifdef CONFIG_SHOW_ACTIVITY
545 if (arp_timeout_check() > 0)
546 time_start = get_timer(0);
549 * Check the ethernet for a new packet. The ethernet
550 * receive routine will process it.
551 * Most drivers return the most recent packet size, but not
552 * errors that may have happened.
557 * Abort if ctrl-c was pressed.
560 /* cancel any ARP that may not have completed */
561 net_arp_wait_packet_ip.s_addr = 0;
565 /* Invalidate the last protocol */
566 eth_set_last_protocol(BOOTP);
569 /* include a debug print as well incase the debug
570 messages are directed to stderr */
571 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
577 * Check for a timeout, and run the timeout handler
581 ((get_timer(0) - time_start) > time_delta)) {
584 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
585 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
586 defined(CONFIG_STATUS_LED) && \
587 defined(STATUS_LED_RED)
589 * Echo the inverted link state to the fault LED.
591 if (miiphy_link(eth_get_dev()->name,
592 CONFIG_SYS_FAULT_MII_ADDR))
593 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
595 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
596 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
597 #endif /* CONFIG_MII, ... */
598 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
600 time_handler = (thand_f *)0;
604 if (net_state == NETLOOP_FAIL)
605 ret = net_start_again();
608 case NETLOOP_RESTART:
612 case NETLOOP_SUCCESS:
614 if (net_boot_file_size > 0) {
615 printf("Bytes transferred = %d (%x hex)\n",
616 net_boot_file_size, net_boot_file_size);
617 setenv_hex("filesize", net_boot_file_size);
618 setenv_hex("fileaddr", load_addr);
620 if (protocol != NETCONS)
623 eth_halt_state_only();
625 eth_set_last_protocol(protocol);
627 ret = net_boot_file_size;
628 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
633 /* Invalidate the last protocol */
634 eth_set_last_protocol(BOOTP);
635 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
638 case NETLOOP_CONTINUE:
644 #ifdef CONFIG_USB_KEYBOARD
647 #ifdef CONFIG_CMD_TFTPPUT
648 /* Clear out the handlers */
649 net_set_udp_handler(NULL);
650 net_set_icmp_handler(NULL);
655 /**********************************************************************/
657 static void start_again_timeout_handler(void)
659 net_set_state(NETLOOP_RESTART);
662 int net_start_again(void)
665 int retry_forever = 0;
666 unsigned long retrycnt = 0;
669 nretry = getenv("netretry");
671 if (!strcmp(nretry, "yes"))
673 else if (!strcmp(nretry, "no"))
675 else if (!strcmp(nretry, "once"))
678 retrycnt = simple_strtoul(nretry, NULL, 0);
684 if ((!retry_forever) && (net_try_count >= retrycnt)) {
686 net_set_state(NETLOOP_FAIL);
688 * We don't provide a way for the protocol to return an error,
689 * but this is almost always the reason.
697 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
698 eth_try_another(!net_restarted);
701 if (net_restart_wrap) {
702 net_restart_wrap = 0;
703 if (net_dev_exists) {
704 net_set_timeout_handler(10000UL,
705 start_again_timeout_handler);
706 net_set_udp_handler(NULL);
708 net_set_state(NETLOOP_FAIL);
711 net_set_state(NETLOOP_RESTART);
716 /**********************************************************************/
721 static void dummy_handler(uchar *pkt, unsigned dport,
722 struct in_addr sip, unsigned sport,
727 rxhand_f *net_get_udp_handler(void)
729 return udp_packet_handler;
732 void net_set_udp_handler(rxhand_f *f)
734 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
736 udp_packet_handler = dummy_handler;
738 udp_packet_handler = f;
741 rxhand_f *net_get_arp_handler(void)
743 return arp_packet_handler;
746 void net_set_arp_handler(rxhand_f *f)
748 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
750 arp_packet_handler = dummy_handler;
752 arp_packet_handler = f;
755 #ifdef CONFIG_CMD_TFTPPUT
756 void net_set_icmp_handler(rxhand_icmp_f *f)
758 packet_icmp_handler = f;
762 void net_set_timeout_handler(ulong iv, thand_f *f)
765 debug_cond(DEBUG_INT_STATE,
766 "--- net_loop timeout handler cancelled\n");
767 time_handler = (thand_f *)0;
769 debug_cond(DEBUG_INT_STATE,
770 "--- net_loop timeout handler set (%p)\n", f);
772 time_start = get_timer(0);
773 time_delta = iv * CONFIG_SYS_HZ / 1000;
777 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
784 /* make sure the net_tx_packet is initialized (net_init() was called) */
785 assert(net_tx_packet != NULL);
786 if (net_tx_packet == NULL)
789 /* convert to new style broadcast */
790 if (dest.s_addr == 0)
791 dest.s_addr = 0xFFFFFFFF;
793 /* if broadcast, make the ether address a broadcast and don't do ARP */
794 if (dest.s_addr == 0xFFFFFFFF)
795 ether = (uchar *)net_bcast_ethaddr;
797 pkt = (uchar *)net_tx_packet;
799 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
801 net_set_udp_header(pkt, dest, dport, sport, payload_len);
802 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
804 /* if MAC address was not discovered yet, do an ARP request */
805 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
806 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
808 /* save the ip and eth addr for the packet to send after arp */
809 net_arp_wait_packet_ip = dest;
810 arp_wait_packet_ethaddr = ether;
812 /* size of the waiting packet */
813 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
815 /* and do the ARP request */
817 arp_wait_timer_start = get_timer(0);
819 return 1; /* waiting */
821 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
823 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
824 return 0; /* transmitted */
828 #ifdef CONFIG_IP_DEFRAG
830 * This function collects fragments in a single packet, according
831 * to the algorithm in RFC815. It returns NULL or the pointer to
832 * a complete packet, in static storage
834 #ifndef CONFIG_NET_MAXDEFRAG
835 #define CONFIG_NET_MAXDEFRAG 16384
837 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
839 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
842 * this is the packet being assembled, either data or frag control.
843 * Fragments go by 8 bytes, so this union must be 8 bytes long
846 /* first_byte is address of this structure */
847 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
848 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
849 u16 prev_hole; /* index of prev, 0 == none */
853 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
855 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
856 static u16 first_hole, total_len;
857 struct hole *payload, *thisfrag, *h, *newh;
858 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
859 uchar *indata = (uchar *)ip;
860 int offset8, start, len, done = 0;
861 u16 ip_off = ntohs(ip->ip_off);
863 /* payload starts after IP header, this fragment is in there */
864 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
865 offset8 = (ip_off & IP_OFFS);
866 thisfrag = payload + offset8;
868 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
870 if (start + len > IP_MAXUDP) /* fragment extends too far */
873 if (!total_len || localip->ip_id != ip->ip_id) {
874 /* new (or different) packet, reset structs */
876 payload[0].last_byte = ~0;
877 payload[0].next_hole = 0;
878 payload[0].prev_hole = 0;
880 /* any IP header will work, copy the first we received */
881 memcpy(localip, ip, IP_HDR_SIZE);
885 * What follows is the reassembly algorithm. We use the payload
886 * array as a linked list of hole descriptors, as each hole starts
887 * at a multiple of 8 bytes. However, last byte can be whatever value,
888 * so it is represented as byte count, not as 8-byte blocks.
891 h = payload + first_hole;
892 while (h->last_byte < start) {
894 /* no hole that far away */
897 h = payload + h->next_hole;
900 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
901 if (offset8 + ((len + 7) / 8) <= h - payload) {
902 /* no overlap with holes (dup fragment?) */
906 if (!(ip_off & IP_FLAGS_MFRAG)) {
907 /* no more fragmentss: truncate this (last) hole */
908 total_len = start + len;
909 h->last_byte = start + len;
913 * There is some overlap: fix the hole list. This code doesn't
914 * deal with a fragment that overlaps with two different holes
915 * (thus being a superset of a previously-received fragment).
918 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
919 /* complete overlap with hole: remove hole */
920 if (!h->prev_hole && !h->next_hole) {
921 /* last remaining hole */
923 } else if (!h->prev_hole) {
925 first_hole = h->next_hole;
926 payload[h->next_hole].prev_hole = 0;
927 } else if (!h->next_hole) {
929 payload[h->prev_hole].next_hole = 0;
931 /* in the middle of the list */
932 payload[h->next_hole].prev_hole = h->prev_hole;
933 payload[h->prev_hole].next_hole = h->next_hole;
936 } else if (h->last_byte <= start + len) {
937 /* overlaps with final part of the hole: shorten this hole */
938 h->last_byte = start;
940 } else if (h >= thisfrag) {
941 /* overlaps with initial part of the hole: move this hole */
942 newh = thisfrag + (len / 8);
946 payload[h->next_hole].prev_hole = (h - payload);
948 payload[h->prev_hole].next_hole = (h - payload);
950 first_hole = (h - payload);
953 /* fragment sits in the middle: split the hole */
954 newh = thisfrag + (len / 8);
956 h->last_byte = start;
957 h->next_hole = (newh - payload);
958 newh->prev_hole = (h - payload);
960 payload[newh->next_hole].prev_hole = (newh - payload);
963 /* finally copy this fragment and possibly return whole packet */
964 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
968 localip->ip_len = htons(total_len);
969 *lenp = total_len + IP_HDR_SIZE;
973 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
976 u16 ip_off = ntohs(ip->ip_off);
977 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
978 return ip; /* not a fragment */
979 return __net_defragment(ip, lenp);
982 #else /* !CONFIG_IP_DEFRAG */
984 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
987 u16 ip_off = ntohs(ip->ip_off);
988 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
989 return ip; /* not a fragment */
995 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
998 * @parma ip IP packet containing the ICMP
1000 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1001 struct in_addr src_ip, struct ethernet_hdr *et)
1003 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1005 switch (icmph->type) {
1007 if (icmph->code != ICMP_REDIR_HOST)
1009 printf(" ICMP Host Redirect to %pI4 ",
1010 &icmph->un.gateway);
1013 #if defined(CONFIG_CMD_PING)
1014 ping_receive(et, ip, len);
1016 #ifdef CONFIG_CMD_TFTPPUT
1017 if (packet_icmp_handler)
1018 packet_icmp_handler(icmph->type, icmph->code,
1019 ntohs(ip->udp_dst), src_ip,
1020 ntohs(ip->udp_src), icmph->un.data,
1021 ntohs(ip->udp_len));
1027 void net_process_received_packet(uchar *in_packet, int len)
1029 struct ethernet_hdr *et;
1030 struct ip_udp_hdr *ip;
1031 struct in_addr dst_ip;
1032 struct in_addr src_ip;
1034 #if defined(CONFIG_CMD_CDP)
1037 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1039 debug_cond(DEBUG_NET_PKT, "packet received\n");
1041 net_rx_packet = in_packet;
1042 net_rx_packet_len = len;
1043 et = (struct ethernet_hdr *)in_packet;
1045 /* too small packet? */
1046 if (len < ETHER_HDR_SIZE)
1049 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1051 (*push_packet)(in_packet, len);
1056 #if defined(CONFIG_CMD_CDP)
1057 /* keep track if packet is CDP */
1058 iscdp = is_cdp_packet(et->et_dest);
1061 myvlanid = ntohs(net_our_vlan);
1062 if (myvlanid == (ushort)-1)
1063 myvlanid = VLAN_NONE;
1064 mynvlanid = ntohs(net_native_vlan);
1065 if (mynvlanid == (ushort)-1)
1066 mynvlanid = VLAN_NONE;
1068 eth_proto = ntohs(et->et_protlen);
1070 if (eth_proto < 1514) {
1071 struct e802_hdr *et802 = (struct e802_hdr *)et;
1073 * Got a 802.2 packet. Check the other protocol field.
1074 * XXX VLAN over 802.2+SNAP not implemented!
1076 eth_proto = ntohs(et802->et_prot);
1078 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1079 len -= E802_HDR_SIZE;
1081 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1082 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1083 len -= ETHER_HDR_SIZE;
1085 } else { /* VLAN packet */
1086 struct vlan_ethernet_hdr *vet =
1087 (struct vlan_ethernet_hdr *)et;
1089 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1091 /* too small packet? */
1092 if (len < VLAN_ETHER_HDR_SIZE)
1095 /* if no VLAN active */
1096 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1097 #if defined(CONFIG_CMD_CDP)
1103 cti = ntohs(vet->vet_tag);
1104 vlanid = cti & VLAN_IDMASK;
1105 eth_proto = ntohs(vet->vet_type);
1107 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1108 len -= VLAN_ETHER_HDR_SIZE;
1111 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1113 #if defined(CONFIG_CMD_CDP)
1115 cdp_receive((uchar *)ip, len);
1120 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1121 if (vlanid == VLAN_NONE)
1122 vlanid = (mynvlanid & VLAN_IDMASK);
1124 if (vlanid != (myvlanid & VLAN_IDMASK))
1128 switch (eth_proto) {
1130 arp_receive(et, ip, len);
1133 #ifdef CONFIG_CMD_RARP
1135 rarp_receive(ip, len);
1139 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1140 /* Before we start poking the header, make sure it is there */
1141 if (len < IP_UDP_HDR_SIZE) {
1142 debug("len bad %d < %lu\n", len,
1143 (ulong)IP_UDP_HDR_SIZE);
1146 /* Check the packet length */
1147 if (len < ntohs(ip->ip_len)) {
1148 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1151 len = ntohs(ip->ip_len);
1152 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1153 len, ip->ip_hl_v & 0xff);
1155 /* Can't deal with anything except IPv4 */
1156 if ((ip->ip_hl_v & 0xf0) != 0x40)
1158 /* Can't deal with IP options (headers != 20 bytes) */
1159 if ((ip->ip_hl_v & 0x0f) > 0x05)
1161 /* Check the Checksum of the header */
1162 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1163 debug("checksum bad\n");
1166 /* If it is not for us, ignore it */
1167 dst_ip = net_read_ip(&ip->ip_dst);
1168 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1169 dst_ip.s_addr != 0xFFFFFFFF) {
1170 #ifdef CONFIG_MCAST_TFTP
1171 if (net_mcast_addr != dst_ip)
1175 /* Read source IP address for later use */
1176 src_ip = net_read_ip(&ip->ip_src);
1178 * The function returns the unchanged packet if it's not
1179 * a fragment, and either the complete packet or NULL if
1180 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1182 ip = net_defragment(ip, &len);
1186 * watch for ICMP host redirects
1188 * There is no real handler code (yet). We just watch
1189 * for ICMP host redirect messages. In case anybody
1190 * sees these messages: please contact me
1191 * (wd@denx.de), or - even better - send me the
1192 * necessary fixes :-)
1194 * Note: in all cases where I have seen this so far
1195 * it was a problem with the router configuration,
1196 * for instance when a router was configured in the
1197 * BOOTP reply, but the TFTP server was on the same
1198 * subnet. So this is probably a warning that your
1199 * configuration might be wrong. But I'm not really
1200 * sure if there aren't any other situations.
1202 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1203 * we send a tftp packet to a dead connection, or when
1204 * there is no server at the other end.
1206 if (ip->ip_p == IPPROTO_ICMP) {
1207 receive_icmp(ip, len, src_ip, et);
1209 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1213 debug_cond(DEBUG_DEV_PKT,
1214 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1215 &dst_ip, &src_ip, len);
1217 #ifdef CONFIG_UDP_CHECKSUM
1218 if (ip->udp_xsum != 0) {
1224 xsum += (ntohs(ip->udp_len));
1225 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1226 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1227 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1228 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1230 sumlen = ntohs(ip->udp_len);
1231 sumptr = (ushort *)&(ip->udp_src);
1233 while (sumlen > 1) {
1236 sumdata = *sumptr++;
1237 xsum += ntohs(sumdata);
1243 sumdata = *(unsigned char *)sumptr;
1244 sumdata = (sumdata << 8) & 0xff00;
1247 while ((xsum >> 16) != 0) {
1248 xsum = (xsum & 0x0000ffff) +
1249 ((xsum >> 16) & 0x0000ffff);
1251 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1252 printf(" UDP wrong checksum %08lx %08x\n",
1253 xsum, ntohs(ip->udp_xsum));
1259 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1260 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1264 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1267 * IP header OK. Pass the packet to the current handler.
1269 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1273 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1278 /**********************************************************************/
1280 static int net_check_prereq(enum proto_t protocol)
1284 #if defined(CONFIG_CMD_PING)
1286 if (net_ping_ip.s_addr == 0) {
1287 puts("*** ERROR: ping address not given\n");
1292 #if defined(CONFIG_CMD_SNTP)
1294 if (net_ntp_server.s_addr == 0) {
1295 puts("*** ERROR: NTP server address not given\n");
1300 #if defined(CONFIG_CMD_DNS)
1302 if (net_dns_server.s_addr == 0) {
1303 puts("*** ERROR: DNS server address not given\n");
1308 #if defined(CONFIG_CMD_NFS)
1314 if (net_server_ip.s_addr == 0) {
1315 puts("*** ERROR: `serverip' not set\n");
1318 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1319 defined(CONFIG_CMD_DNS)
1326 if (net_ip.s_addr == 0) {
1327 puts("*** ERROR: `ipaddr' not set\n");
1332 #ifdef CONFIG_CMD_RARP
1339 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1340 int num = eth_get_dev_index();
1344 puts("*** ERROR: No ethernet found.\n");
1347 puts("*** ERROR: `ethaddr' not set\n");
1350 printf("*** ERROR: `eth%daddr' not set\n",
1364 /**********************************************************************/
1367 net_eth_hdr_size(void)
1371 myvlanid = ntohs(net_our_vlan);
1372 if (myvlanid == (ushort)-1)
1373 myvlanid = VLAN_NONE;
1375 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1376 VLAN_ETHER_HDR_SIZE;
1379 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1381 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1384 myvlanid = ntohs(net_our_vlan);
1385 if (myvlanid == (ushort)-1)
1386 myvlanid = VLAN_NONE;
1388 memcpy(et->et_dest, dest_ethaddr, 6);
1389 memcpy(et->et_src, net_ethaddr, 6);
1390 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1391 et->et_protlen = htons(prot);
1392 return ETHER_HDR_SIZE;
1394 struct vlan_ethernet_hdr *vet =
1395 (struct vlan_ethernet_hdr *)xet;
1397 vet->vet_vlan_type = htons(PROT_VLAN);
1398 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1399 vet->vet_type = htons(prot);
1400 return VLAN_ETHER_HDR_SIZE;
1404 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1408 memcpy(et->et_dest, addr, 6);
1409 memcpy(et->et_src, net_ethaddr, 6);
1410 protlen = ntohs(et->et_protlen);
1411 if (protlen == PROT_VLAN) {
1412 struct vlan_ethernet_hdr *vet =
1413 (struct vlan_ethernet_hdr *)et;
1414 vet->vet_type = htons(prot);
1415 return VLAN_ETHER_HDR_SIZE;
1416 } else if (protlen > 1514) {
1417 et->et_protlen = htons(prot);
1418 return ETHER_HDR_SIZE;
1421 struct e802_hdr *et802 = (struct e802_hdr *)et;
1422 et802->et_prot = htons(prot);
1423 return E802_HDR_SIZE;
1427 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1429 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1432 * Construct an IP header.
1434 /* IP_HDR_SIZE / 4 (not including UDP) */
1437 ip->ip_len = htons(IP_HDR_SIZE);
1438 ip->ip_id = htons(net_ip_id++);
1439 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1442 /* already in network byte order */
1443 net_copy_ip((void *)&ip->ip_src, &source);
1444 /* already in network byte order */
1445 net_copy_ip((void *)&ip->ip_dst, &dest);
1448 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1451 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1454 * If the data is an odd number of bytes, zero the
1455 * byte after the last byte so that the checksum
1459 pkt[IP_UDP_HDR_SIZE + len] = 0;
1461 net_set_ip_header(pkt, dest, net_ip);
1462 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1463 ip->ip_p = IPPROTO_UDP;
1464 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1466 ip->udp_src = htons(sport);
1467 ip->udp_dst = htons(dport);
1468 ip->udp_len = htons(UDP_HDR_SIZE + len);
1472 void copy_filename(char *dst, const char *src, int size)
1474 if (*src && (*src == '"')) {
1479 while ((--size > 0) && *src && (*src != '"'))
1484 #if defined(CONFIG_CMD_NFS) || \
1485 defined(CONFIG_CMD_SNTP) || \
1486 defined(CONFIG_CMD_DNS)
1488 * make port a little random (1024-17407)
1489 * This keeps the math somewhat trivial to compute, and seems to work with
1490 * all supported protocols/clients/servers
1492 unsigned int random_port(void)
1494 return 1024 + (get_timer(0) % 0x4000);
1498 void ip_to_string(struct in_addr x, char *s)
1500 x.s_addr = ntohl(x.s_addr);
1501 sprintf(s, "%d.%d.%d.%d",
1502 (int) ((x.s_addr >> 24) & 0xff),
1503 (int) ((x.s_addr >> 16) & 0xff),
1504 (int) ((x.s_addr >> 8) & 0xff),
1505 (int) ((x.s_addr >> 0) & 0xff)
1509 void vlan_to_string(ushort x, char *s)
1513 if (x == (ushort)-1)
1519 sprintf(s, "%d", x & VLAN_IDMASK);
1522 ushort string_to_vlan(const char *s)
1527 return htons(VLAN_NONE);
1529 if (*s < '0' || *s > '9')
1532 id = (ushort)simple_strtoul(s, NULL, 10);
1537 ushort getenv_vlan(char *var)
1539 return string_to_vlan(getenv(var));