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,
211 if (flags & H_PROGRAMMATIC)
216 case env_op_overwrite:
217 copy_filename(net_boot_file_name, value,
218 sizeof(net_boot_file_name));
226 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile);
228 static int on_ipaddr(const char *name, const char *value, enum env_op op,
231 if (flags & H_PROGRAMMATIC)
234 net_ip = string_to_ip(value);
238 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
240 static int on_gatewayip(const char *name, const char *value, enum env_op op,
243 if (flags & H_PROGRAMMATIC)
246 net_gateway = string_to_ip(value);
250 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
252 static int on_netmask(const char *name, const char *value, enum env_op op,
255 if (flags & H_PROGRAMMATIC)
258 net_netmask = string_to_ip(value);
262 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
264 static int on_serverip(const char *name, const char *value, enum env_op op,
267 if (flags & H_PROGRAMMATIC)
270 net_server_ip = string_to_ip(value);
274 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
276 static int on_nvlan(const char *name, const char *value, enum env_op op,
279 if (flags & H_PROGRAMMATIC)
282 net_native_vlan = string_to_vlan(value);
286 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
288 static int on_vlan(const char *name, const char *value, enum env_op op,
291 if (flags & H_PROGRAMMATIC)
294 net_our_vlan = string_to_vlan(value);
298 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
300 #if defined(CONFIG_CMD_DNS)
301 static int on_dnsip(const char *name, const char *value, enum env_op op,
304 if (flags & H_PROGRAMMATIC)
307 net_dns_server = string_to_ip(value);
311 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
315 * Check if autoload is enabled. If so, use either NFS or TFTP to download
318 void net_auto_load(void)
320 #if defined(CONFIG_CMD_NFS)
321 const char *s = getenv("autoload");
323 if (s != NULL && strcmp(s, "NFS") == 0) {
325 * Use NFS to load the bootfile.
331 if (getenv_yesno("autoload") == 0) {
333 * Just use BOOTP/RARP to configure system;
334 * Do not use TFTP to load the bootfile.
336 net_set_state(NETLOOP_SUCCESS);
342 static void net_init_loop(void)
345 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
350 static void net_clear_handlers(void)
352 net_set_udp_handler(NULL);
353 net_set_arp_handler(NULL);
354 net_set_timeout_handler(0, NULL);
357 static void net_cleanup_loop(void)
359 net_clear_handlers();
364 static int first_call = 1;
368 * Setup packet buffers, aligned correctly.
372 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
373 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
374 for (i = 0; i < PKTBUFSRX; i++) {
375 net_rx_packets[i] = net_tx_packet +
376 (i + 1) * PKTSIZE_ALIGN;
379 net_clear_handlers();
381 /* Only need to setup buffer pointers once. */
388 /**********************************************************************/
390 * Main network processing loop.
393 int net_loop(enum proto_t protocol)
400 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
402 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
404 if (eth_is_on_demand_init() || protocol != NETCONS) {
413 eth_init_state_only();
416 #ifdef CONFIG_USB_KEYBOARD
419 net_set_state(NETLOOP_CONTINUE);
422 * Start the ball rolling with the given start function. From
423 * here on, this code is a state machine driven by received
424 * packets and timer events.
426 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
429 switch (net_check_prereq(protocol)) {
431 /* network not configured */
436 /* network device not configured */
441 net_boot_file_size = 0;
444 #ifdef CONFIG_CMD_TFTPPUT
447 /* always use ARP to get server ethernet address */
448 tftp_start(protocol);
450 #ifdef CONFIG_CMD_TFTPSRV
455 #if defined(CONFIG_CMD_DHCP)
459 dhcp_request(); /* Basically same as BOOTP */
469 #if defined(CONFIG_CMD_RARP)
476 #if defined(CONFIG_CMD_PING)
481 #if defined(CONFIG_CMD_NFS)
486 #if defined(CONFIG_CMD_CDP)
491 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
496 #if defined(CONFIG_CMD_SNTP)
501 #if defined(CONFIG_CMD_DNS)
506 #if defined(CONFIG_CMD_LINK_LOCAL)
511 #if defined(CONFIG_CMD_BOOTCE)
523 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
524 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
525 defined(CONFIG_STATUS_LED) && \
526 defined(STATUS_LED_RED)
528 * Echo the inverted link state to the fault LED.
530 if (miiphy_link(eth_get_dev()->name, 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);
534 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
535 #endif /* CONFIG_MII, ... */
536 #ifdef CONFIG_USB_KEYBOARD
541 * Main packet reception loop. Loop receiving packets until
542 * someone sets `net_state' to a state that terminates.
546 #ifdef CONFIG_SHOW_ACTIVITY
550 * Check the ethernet for a new packet. The ethernet
551 * receive routine will process it.
552 * Most drivers return the most recent packet size, but not
553 * errors that may have happened.
558 * Abort if ctrl-c was pressed.
561 /* cancel any ARP that may not have completed */
562 net_arp_wait_packet_ip.s_addr = 0;
566 /* Invalidate the last protocol */
567 eth_set_last_protocol(BOOTP);
570 /* include a debug print as well incase the debug
571 messages are directed to stderr */
572 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
580 * Check for a timeout, and run the timeout handler
584 (get_timer(time_start) > time_delta)) {
587 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
588 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
589 defined(CONFIG_STATUS_LED) && \
590 defined(STATUS_LED_RED)
592 * Echo the inverted link state to the fault LED.
594 if (miiphy_link(eth_get_dev()->name,
595 CONFIG_SYS_FAULT_MII_ADDR))
596 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
598 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
599 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
600 #endif /* CONFIG_MII, ... */
601 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
603 time_handler = (thand_f *)0;
607 if (net_state == NETLOOP_FAIL)
608 ret = net_start_again();
611 case NETLOOP_RESTART:
615 case NETLOOP_SUCCESS:
617 if (net_boot_file_size > 0) {
618 printf("Bytes transferred = %d (%x hex)\n",
619 net_boot_file_size, net_boot_file_size);
620 setenv_hex("filesize", net_boot_file_size);
621 setenv_hex("fileaddr", load_addr);
623 if (protocol != NETCONS)
626 eth_halt_state_only();
628 eth_set_last_protocol(protocol);
630 ret = net_boot_file_size;
631 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
636 /* Invalidate the last protocol */
637 eth_set_last_protocol(BOOTP);
638 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
641 case NETLOOP_CONTINUE:
647 #ifdef CONFIG_USB_KEYBOARD
650 #ifdef CONFIG_CMD_TFTPPUT
651 /* Clear out the handlers */
652 net_set_udp_handler(NULL);
653 net_set_icmp_handler(NULL);
658 /**********************************************************************/
660 static void start_again_timeout_handler(void)
662 net_set_state(NETLOOP_RESTART);
665 int net_start_again(void)
668 int retry_forever = 0;
669 unsigned long retrycnt = 0;
672 nretry = getenv("netretry");
674 if (!strcmp(nretry, "yes"))
676 else if (!strcmp(nretry, "no"))
678 else if (!strcmp(nretry, "once"))
681 retrycnt = simple_strtoul(nretry, NULL, 0);
687 if ((!retry_forever) && (net_try_count >= retrycnt)) {
689 net_set_state(NETLOOP_FAIL);
691 * We don't provide a way for the protocol to return an error,
692 * but this is almost always the reason.
700 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
701 eth_try_another(!net_restarted);
704 if (net_restart_wrap) {
705 net_restart_wrap = 0;
706 if (net_dev_exists) {
707 net_set_timeout_handler(10000UL,
708 start_again_timeout_handler);
709 net_set_udp_handler(NULL);
711 net_set_state(NETLOOP_FAIL);
714 net_set_state(NETLOOP_RESTART);
719 /**********************************************************************/
724 static void dummy_handler(uchar *pkt, unsigned dport,
725 struct in_addr sip, unsigned sport,
730 rxhand_f *net_get_udp_handler(void)
732 return udp_packet_handler;
735 void net_set_udp_handler(rxhand_f *f)
737 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
739 udp_packet_handler = dummy_handler;
741 udp_packet_handler = f;
744 rxhand_f *net_get_arp_handler(void)
746 return arp_packet_handler;
749 void net_set_arp_handler(rxhand_f *f)
751 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
753 arp_packet_handler = dummy_handler;
755 arp_packet_handler = f;
758 #ifdef CONFIG_CMD_TFTPPUT
759 void net_set_icmp_handler(rxhand_icmp_f *f)
761 packet_icmp_handler = f;
765 void net_set_timeout_handler(ulong iv, thand_f *f)
768 debug_cond(DEBUG_INT_STATE,
769 "--- net_loop timeout handler cancelled\n");
770 time_handler = (thand_f *)0;
772 debug_cond(DEBUG_INT_STATE,
773 "--- net_loop timeout handler set (%p)\n", f);
775 time_start = get_timer(0);
776 time_delta = iv * CONFIG_SYS_HZ / 1000;
780 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
787 /* make sure the net_tx_packet is initialized (net_init() was called) */
788 assert(net_tx_packet != NULL);
789 if (net_tx_packet == NULL)
792 /* convert to new style broadcast */
793 if (dest.s_addr == 0)
794 dest.s_addr = 0xFFFFFFFF;
796 /* if broadcast, make the ether address a broadcast and don't do ARP */
797 if (dest.s_addr == 0xFFFFFFFF)
798 ether = (uchar *)net_bcast_ethaddr;
800 pkt = (uchar *)net_tx_packet;
802 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
804 net_set_udp_header(pkt, dest, dport, sport, payload_len);
805 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
807 /* if MAC address was not discovered yet, do an ARP request */
808 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
809 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
811 /* save the ip and eth addr for the packet to send after arp */
812 net_arp_wait_packet_ip = dest;
813 arp_wait_packet_ethaddr = ether;
815 /* size of the waiting packet */
816 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
818 /* and do the ARP request */
820 arp_wait_timer_start = get_timer(0);
822 return 1; /* waiting */
824 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
826 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
827 return 0; /* transmitted */
831 #ifdef CONFIG_IP_DEFRAG
833 * This function collects fragments in a single packet, according
834 * to the algorithm in RFC815. It returns NULL or the pointer to
835 * a complete packet, in static storage
837 #ifndef CONFIG_NET_MAXDEFRAG
838 #define CONFIG_NET_MAXDEFRAG 16384
841 * MAXDEFRAG, above, is chosen in the config file and is real data
842 * so we need to add the NFS overhead, which is more than TFTP.
843 * To use sizeof in the internal unnamed structures, we need a real
844 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
845 * The compiler doesn't complain nor allocates the actual structure
847 static struct rpc_t rpc_specimen;
848 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
850 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
853 * this is the packet being assembled, either data or frag control.
854 * Fragments go by 8 bytes, so this union must be 8 bytes long
857 /* first_byte is address of this structure */
858 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
859 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
860 u16 prev_hole; /* index of prev, 0 == none */
864 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
866 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
867 static u16 first_hole, total_len;
868 struct hole *payload, *thisfrag, *h, *newh;
869 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
870 uchar *indata = (uchar *)ip;
871 int offset8, start, len, done = 0;
872 u16 ip_off = ntohs(ip->ip_off);
874 /* payload starts after IP header, this fragment is in there */
875 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
876 offset8 = (ip_off & IP_OFFS);
877 thisfrag = payload + offset8;
879 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
881 if (start + len > IP_MAXUDP) /* fragment extends too far */
884 if (!total_len || localip->ip_id != ip->ip_id) {
885 /* new (or different) packet, reset structs */
887 payload[0].last_byte = ~0;
888 payload[0].next_hole = 0;
889 payload[0].prev_hole = 0;
891 /* any IP header will work, copy the first we received */
892 memcpy(localip, ip, IP_HDR_SIZE);
896 * What follows is the reassembly algorithm. We use the payload
897 * array as a linked list of hole descriptors, as each hole starts
898 * at a multiple of 8 bytes. However, last byte can be whatever value,
899 * so it is represented as byte count, not as 8-byte blocks.
902 h = payload + first_hole;
903 while (h->last_byte < start) {
905 /* no hole that far away */
908 h = payload + h->next_hole;
911 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
912 if (offset8 + ((len + 7) / 8) <= h - payload) {
913 /* no overlap with holes (dup fragment?) */
917 if (!(ip_off & IP_FLAGS_MFRAG)) {
918 /* no more fragmentss: truncate this (last) hole */
919 total_len = start + len;
920 h->last_byte = start + len;
924 * There is some overlap: fix the hole list. This code doesn't
925 * deal with a fragment that overlaps with two different holes
926 * (thus being a superset of a previously-received fragment).
929 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
930 /* complete overlap with hole: remove hole */
931 if (!h->prev_hole && !h->next_hole) {
932 /* last remaining hole */
934 } else if (!h->prev_hole) {
936 first_hole = h->next_hole;
937 payload[h->next_hole].prev_hole = 0;
938 } else if (!h->next_hole) {
940 payload[h->prev_hole].next_hole = 0;
942 /* in the middle of the list */
943 payload[h->next_hole].prev_hole = h->prev_hole;
944 payload[h->prev_hole].next_hole = h->next_hole;
947 } else if (h->last_byte <= start + len) {
948 /* overlaps with final part of the hole: shorten this hole */
949 h->last_byte = start;
951 } else if (h >= thisfrag) {
952 /* overlaps with initial part of the hole: move this hole */
953 newh = thisfrag + (len / 8);
957 payload[h->next_hole].prev_hole = (h - payload);
959 payload[h->prev_hole].next_hole = (h - payload);
961 first_hole = (h - payload);
964 /* fragment sits in the middle: split the hole */
965 newh = thisfrag + (len / 8);
967 h->last_byte = start;
968 h->next_hole = (newh - payload);
969 newh->prev_hole = (h - payload);
971 payload[newh->next_hole].prev_hole = (newh - payload);
974 /* finally copy this fragment and possibly return whole packet */
975 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
979 localip->ip_len = htons(total_len);
980 *lenp = total_len + IP_HDR_SIZE;
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 */
990 return __net_defragment(ip, lenp);
993 #else /* !CONFIG_IP_DEFRAG */
995 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
998 u16 ip_off = ntohs(ip->ip_off);
999 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1000 return ip; /* not a fragment */
1006 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1009 * @parma ip IP packet containing the ICMP
1011 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1012 struct in_addr src_ip, struct ethernet_hdr *et)
1014 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1016 switch (icmph->type) {
1018 if (icmph->code != ICMP_REDIR_HOST)
1020 printf(" ICMP Host Redirect to %pI4 ",
1021 &icmph->un.gateway);
1024 #if defined(CONFIG_CMD_PING)
1025 ping_receive(et, ip, len);
1027 #ifdef CONFIG_CMD_TFTPPUT
1028 if (packet_icmp_handler)
1029 packet_icmp_handler(icmph->type, icmph->code,
1030 ntohs(ip->udp_dst), src_ip,
1031 ntohs(ip->udp_src), icmph->un.data,
1032 ntohs(ip->udp_len));
1038 void net_process_received_packet(uchar *in_packet, int len)
1040 struct ethernet_hdr *et;
1041 struct ip_udp_hdr *ip;
1042 struct in_addr dst_ip;
1043 struct in_addr src_ip;
1045 #if defined(CONFIG_CMD_CDP)
1048 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1050 debug_cond(DEBUG_NET_PKT, "packet received\n");
1052 net_rx_packet = in_packet;
1053 net_rx_packet_len = len;
1054 et = (struct ethernet_hdr *)in_packet;
1056 /* too small packet? */
1057 if (len < ETHER_HDR_SIZE)
1062 (*push_packet)(in_packet, len);
1067 #if defined(CONFIG_CMD_CDP)
1068 /* keep track if packet is CDP */
1069 iscdp = is_cdp_packet(et->et_dest);
1072 myvlanid = ntohs(net_our_vlan);
1073 if (myvlanid == (ushort)-1)
1074 myvlanid = VLAN_NONE;
1075 mynvlanid = ntohs(net_native_vlan);
1076 if (mynvlanid == (ushort)-1)
1077 mynvlanid = VLAN_NONE;
1079 eth_proto = ntohs(et->et_protlen);
1081 if (eth_proto < 1514) {
1082 struct e802_hdr *et802 = (struct e802_hdr *)et;
1084 * Got a 802.2 packet. Check the other protocol field.
1085 * XXX VLAN over 802.2+SNAP not implemented!
1087 eth_proto = ntohs(et802->et_prot);
1089 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1090 len -= E802_HDR_SIZE;
1092 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1093 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1094 len -= ETHER_HDR_SIZE;
1096 } else { /* VLAN packet */
1097 struct vlan_ethernet_hdr *vet =
1098 (struct vlan_ethernet_hdr *)et;
1100 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1102 /* too small packet? */
1103 if (len < VLAN_ETHER_HDR_SIZE)
1106 /* if no VLAN active */
1107 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1108 #if defined(CONFIG_CMD_CDP)
1114 cti = ntohs(vet->vet_tag);
1115 vlanid = cti & VLAN_IDMASK;
1116 eth_proto = ntohs(vet->vet_type);
1118 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1119 len -= VLAN_ETHER_HDR_SIZE;
1122 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1124 #if defined(CONFIG_CMD_CDP)
1126 cdp_receive((uchar *)ip, len);
1131 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1132 if (vlanid == VLAN_NONE)
1133 vlanid = (mynvlanid & VLAN_IDMASK);
1135 if (vlanid != (myvlanid & VLAN_IDMASK))
1139 switch (eth_proto) {
1141 arp_receive(et, ip, len);
1144 #ifdef CONFIG_CMD_RARP
1146 rarp_receive(ip, len);
1150 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1151 /* Before we start poking the header, make sure it is there */
1152 if (len < IP_UDP_HDR_SIZE) {
1153 debug("len bad %d < %lu\n", len,
1154 (ulong)IP_UDP_HDR_SIZE);
1157 /* Check the packet length */
1158 if (len < ntohs(ip->ip_len)) {
1159 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1162 len = ntohs(ip->ip_len);
1163 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1164 len, ip->ip_hl_v & 0xff);
1166 /* Can't deal with anything except IPv4 */
1167 if ((ip->ip_hl_v & 0xf0) != 0x40)
1169 /* Can't deal with IP options (headers != 20 bytes) */
1170 if ((ip->ip_hl_v & 0x0f) > 0x05)
1172 /* Check the Checksum of the header */
1173 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1174 debug("checksum bad\n");
1177 /* If it is not for us, ignore it */
1178 dst_ip = net_read_ip(&ip->ip_dst);
1179 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1180 dst_ip.s_addr != 0xFFFFFFFF) {
1181 #ifdef CONFIG_MCAST_TFTP
1182 if (net_mcast_addr != dst_ip)
1186 /* Read source IP address for later use */
1187 src_ip = net_read_ip(&ip->ip_src);
1189 * The function returns the unchanged packet if it's not
1190 * a fragment, and either the complete packet or NULL if
1191 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1193 ip = net_defragment(ip, &len);
1197 * watch for ICMP host redirects
1199 * There is no real handler code (yet). We just watch
1200 * for ICMP host redirect messages. In case anybody
1201 * sees these messages: please contact me
1202 * (wd@denx.de), or - even better - send me the
1203 * necessary fixes :-)
1205 * Note: in all cases where I have seen this so far
1206 * it was a problem with the router configuration,
1207 * for instance when a router was configured in the
1208 * BOOTP reply, but the TFTP server was on the same
1209 * subnet. So this is probably a warning that your
1210 * configuration might be wrong. But I'm not really
1211 * sure if there aren't any other situations.
1213 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1214 * we send a tftp packet to a dead connection, or when
1215 * there is no server at the other end.
1217 if (ip->ip_p == IPPROTO_ICMP) {
1218 receive_icmp(ip, len, src_ip, et);
1220 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1224 debug_cond(DEBUG_DEV_PKT,
1225 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1226 &dst_ip, &src_ip, len);
1228 #ifdef CONFIG_UDP_CHECKSUM
1229 if (ip->udp_xsum != 0) {
1235 xsum += (ntohs(ip->udp_len));
1236 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1237 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1238 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1239 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1241 sumlen = ntohs(ip->udp_len);
1242 sumptr = (ushort *)&(ip->udp_src);
1244 while (sumlen > 1) {
1247 sumdata = *sumptr++;
1248 xsum += ntohs(sumdata);
1254 sumdata = *(unsigned char *)sumptr;
1255 sumdata = (sumdata << 8) & 0xff00;
1258 while ((xsum >> 16) != 0) {
1259 xsum = (xsum & 0x0000ffff) +
1260 ((xsum >> 16) & 0x0000ffff);
1262 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1263 printf(" UDP wrong checksum %08lx %08x\n",
1264 xsum, ntohs(ip->udp_xsum));
1270 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1271 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1275 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1278 * IP header OK. Pass the packet to the current handler.
1280 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1284 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1289 /**********************************************************************/
1291 static int net_check_prereq(enum proto_t protocol)
1294 #if defined(CONFIG_CMD_PING)
1296 if (net_ping_ip.s_addr == 0) {
1297 puts("*** ERROR: ping address not given\n");
1302 #if defined(CONFIG_CMD_SNTP)
1304 if (net_ntp_server.s_addr == 0) {
1305 puts("*** ERROR: NTP server address not given\n");
1310 #if defined(CONFIG_CMD_DNS)
1312 if (net_dns_server.s_addr == 0) {
1313 puts("*** ERROR: DNS server address not given\n");
1318 #if defined(CONFIG_CMD_NFS)
1324 if (net_server_ip.s_addr == 0) {
1325 puts("*** ERROR: `serverip' not set\n");
1328 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1329 defined(CONFIG_CMD_DNS)
1337 if (net_ip.s_addr == 0) {
1338 puts("*** ERROR: `ipaddr' not set\n");
1343 #ifdef CONFIG_CMD_RARP
1350 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1351 int num = eth_get_dev_index();
1355 puts("*** ERROR: No ethernet found.\n");
1358 puts("*** ERROR: `ethaddr' not set\n");
1361 printf("*** ERROR: `eth%daddr' not set\n",
1375 /**********************************************************************/
1378 net_eth_hdr_size(void)
1382 myvlanid = ntohs(net_our_vlan);
1383 if (myvlanid == (ushort)-1)
1384 myvlanid = VLAN_NONE;
1386 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1387 VLAN_ETHER_HDR_SIZE;
1390 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1392 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1395 myvlanid = ntohs(net_our_vlan);
1396 if (myvlanid == (ushort)-1)
1397 myvlanid = VLAN_NONE;
1399 memcpy(et->et_dest, dest_ethaddr, 6);
1400 memcpy(et->et_src, net_ethaddr, 6);
1401 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1402 et->et_protlen = htons(prot);
1403 return ETHER_HDR_SIZE;
1405 struct vlan_ethernet_hdr *vet =
1406 (struct vlan_ethernet_hdr *)xet;
1408 vet->vet_vlan_type = htons(PROT_VLAN);
1409 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1410 vet->vet_type = htons(prot);
1411 return VLAN_ETHER_HDR_SIZE;
1415 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1419 memcpy(et->et_dest, addr, 6);
1420 memcpy(et->et_src, net_ethaddr, 6);
1421 protlen = ntohs(et->et_protlen);
1422 if (protlen == PROT_VLAN) {
1423 struct vlan_ethernet_hdr *vet =
1424 (struct vlan_ethernet_hdr *)et;
1425 vet->vet_type = htons(prot);
1426 return VLAN_ETHER_HDR_SIZE;
1427 } else if (protlen > 1514) {
1428 et->et_protlen = htons(prot);
1429 return ETHER_HDR_SIZE;
1432 struct e802_hdr *et802 = (struct e802_hdr *)et;
1433 et802->et_prot = htons(prot);
1434 return E802_HDR_SIZE;
1438 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1440 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1443 * Construct an IP header.
1445 /* IP_HDR_SIZE / 4 (not including UDP) */
1448 ip->ip_len = htons(IP_HDR_SIZE);
1449 ip->ip_id = htons(net_ip_id++);
1450 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1453 /* already in network byte order */
1454 net_copy_ip((void *)&ip->ip_src, &source);
1455 /* already in network byte order */
1456 net_copy_ip((void *)&ip->ip_dst, &dest);
1459 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1462 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1465 * If the data is an odd number of bytes, zero the
1466 * byte after the last byte so that the checksum
1470 pkt[IP_UDP_HDR_SIZE + len] = 0;
1472 net_set_ip_header(pkt, dest, net_ip);
1473 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1474 ip->ip_p = IPPROTO_UDP;
1475 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1477 ip->udp_src = htons(sport);
1478 ip->udp_dst = htons(dport);
1479 ip->udp_len = htons(UDP_HDR_SIZE + len);
1483 void copy_filename(char *dst, const char *src, int size)
1485 if (*src && (*src == '"')) {
1490 while ((--size > 0) && *src && (*src != '"'))
1495 #if defined(CONFIG_CMD_NFS) || \
1496 defined(CONFIG_CMD_SNTP) || \
1497 defined(CONFIG_CMD_DNS)
1499 * make port a little random (1024-17407)
1500 * This keeps the math somewhat trivial to compute, and seems to work with
1501 * all supported protocols/clients/servers
1503 unsigned int random_port(void)
1505 return 1024 + (get_timer(0) % 0x4000);
1509 void ip_to_string(struct in_addr x, char *s)
1511 x.s_addr = ntohl(x.s_addr);
1512 sprintf(s, "%d.%d.%d.%d",
1513 (int) ((x.s_addr >> 24) & 0xff),
1514 (int) ((x.s_addr >> 16) & 0xff),
1515 (int) ((x.s_addr >> 8) & 0xff),
1516 (int) ((x.s_addr >> 0) & 0xff)
1520 void vlan_to_string(ushort x, char *s)
1524 if (x == (ushort)-1)
1530 sprintf(s, "%d", x & VLAN_IDMASK);
1533 ushort string_to_vlan(const char *s)
1538 return htons(VLAN_NONE);
1540 if (*s < '0' || *s > '9')
1543 id = (ushort)simple_strtoul(s, NULL, 10);
1548 ushort getenv_vlan(char *var)
1550 return string_to_vlan(getenv(var));