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>
90 #if defined(CONFIG_STATUS_LED)
92 #include <status_led.h>
95 #include <linux/compiler.h>
99 #if defined(CONFIG_CMD_DNS)
102 #include "link_local.h"
106 #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)
518 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
519 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
520 defined(CONFIG_STATUS_LED) && \
521 defined(STATUS_LED_RED)
523 * Echo the inverted link state to the fault LED.
525 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
526 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
528 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
529 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
530 #endif /* CONFIG_MII, ... */
531 #ifdef CONFIG_USB_KEYBOARD
536 * Main packet reception loop. Loop receiving packets until
537 * someone sets `net_state' to a state that terminates.
541 #ifdef CONFIG_SHOW_ACTIVITY
545 * Check the ethernet for a new packet. The ethernet
546 * receive routine will process it.
547 * Most drivers return the most recent packet size, but not
548 * errors that may have happened.
553 * Abort if ctrl-c was pressed.
556 /* cancel any ARP that may not have completed */
557 net_arp_wait_packet_ip.s_addr = 0;
561 /* Invalidate the last protocol */
562 eth_set_last_protocol(BOOTP);
565 /* include a debug print as well incase the debug
566 messages are directed to stderr */
567 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
575 * Check for a timeout, and run the timeout handler
579 ((get_timer(0) - time_start) > time_delta)) {
582 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
583 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
584 defined(CONFIG_STATUS_LED) && \
585 defined(STATUS_LED_RED)
587 * Echo the inverted link state to the fault LED.
589 if (miiphy_link(eth_get_dev()->name,
590 CONFIG_SYS_FAULT_MII_ADDR))
591 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
593 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
594 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
595 #endif /* CONFIG_MII, ... */
596 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
598 time_handler = (thand_f *)0;
602 if (net_state == NETLOOP_FAIL)
603 ret = net_start_again();
606 case NETLOOP_RESTART:
610 case NETLOOP_SUCCESS:
612 if (net_boot_file_size > 0) {
613 printf("Bytes transferred = %d (%x hex)\n",
614 net_boot_file_size, net_boot_file_size);
615 setenv_hex("filesize", net_boot_file_size);
616 setenv_hex("fileaddr", load_addr);
618 if (protocol != NETCONS)
621 eth_halt_state_only();
623 eth_set_last_protocol(protocol);
625 ret = net_boot_file_size;
626 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
631 /* Invalidate the last protocol */
632 eth_set_last_protocol(BOOTP);
633 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
636 case NETLOOP_CONTINUE:
642 #ifdef CONFIG_USB_KEYBOARD
645 #ifdef CONFIG_CMD_TFTPPUT
646 /* Clear out the handlers */
647 net_set_udp_handler(NULL);
648 net_set_icmp_handler(NULL);
653 /**********************************************************************/
655 static void start_again_timeout_handler(void)
657 net_set_state(NETLOOP_RESTART);
660 int net_start_again(void)
663 int retry_forever = 0;
664 unsigned long retrycnt = 0;
667 nretry = getenv("netretry");
669 if (!strcmp(nretry, "yes"))
671 else if (!strcmp(nretry, "no"))
673 else if (!strcmp(nretry, "once"))
676 retrycnt = simple_strtoul(nretry, NULL, 0);
682 if ((!retry_forever) && (net_try_count >= retrycnt)) {
684 net_set_state(NETLOOP_FAIL);
686 * We don't provide a way for the protocol to return an error,
687 * but this is almost always the reason.
695 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
696 eth_try_another(!net_restarted);
699 if (net_restart_wrap) {
700 net_restart_wrap = 0;
701 if (net_dev_exists) {
702 net_set_timeout_handler(10000UL,
703 start_again_timeout_handler);
704 net_set_udp_handler(NULL);
706 net_set_state(NETLOOP_FAIL);
709 net_set_state(NETLOOP_RESTART);
714 /**********************************************************************/
719 static void dummy_handler(uchar *pkt, unsigned dport,
720 struct in_addr sip, unsigned sport,
725 rxhand_f *net_get_udp_handler(void)
727 return udp_packet_handler;
730 void net_set_udp_handler(rxhand_f *f)
732 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
734 udp_packet_handler = dummy_handler;
736 udp_packet_handler = f;
739 rxhand_f *net_get_arp_handler(void)
741 return arp_packet_handler;
744 void net_set_arp_handler(rxhand_f *f)
746 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
748 arp_packet_handler = dummy_handler;
750 arp_packet_handler = f;
753 #ifdef CONFIG_CMD_TFTPPUT
754 void net_set_icmp_handler(rxhand_icmp_f *f)
756 packet_icmp_handler = f;
760 void net_set_timeout_handler(ulong iv, thand_f *f)
763 debug_cond(DEBUG_INT_STATE,
764 "--- net_loop timeout handler cancelled\n");
765 time_handler = (thand_f *)0;
767 debug_cond(DEBUG_INT_STATE,
768 "--- net_loop timeout handler set (%p)\n", f);
770 time_start = get_timer(0);
771 time_delta = iv * CONFIG_SYS_HZ / 1000;
775 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
782 /* make sure the net_tx_packet is initialized (net_init() was called) */
783 assert(net_tx_packet != NULL);
784 if (net_tx_packet == NULL)
787 /* convert to new style broadcast */
788 if (dest.s_addr == 0)
789 dest.s_addr = 0xFFFFFFFF;
791 /* if broadcast, make the ether address a broadcast and don't do ARP */
792 if (dest.s_addr == 0xFFFFFFFF)
793 ether = (uchar *)net_bcast_ethaddr;
795 pkt = (uchar *)net_tx_packet;
797 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
799 net_set_udp_header(pkt, dest, dport, sport, payload_len);
800 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
802 /* if MAC address was not discovered yet, do an ARP request */
803 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
804 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
806 /* save the ip and eth addr for the packet to send after arp */
807 net_arp_wait_packet_ip = dest;
808 arp_wait_packet_ethaddr = ether;
810 /* size of the waiting packet */
811 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
813 /* and do the ARP request */
815 arp_wait_timer_start = get_timer(0);
817 return 1; /* waiting */
819 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
821 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
822 return 0; /* transmitted */
826 #ifdef CONFIG_IP_DEFRAG
828 * This function collects fragments in a single packet, according
829 * to the algorithm in RFC815. It returns NULL or the pointer to
830 * a complete packet, in static storage
832 #ifndef CONFIG_NET_MAXDEFRAG
833 #define CONFIG_NET_MAXDEFRAG 16384
836 * MAXDEFRAG, above, is chosen in the config file and is real data
837 * so we need to add the NFS overhead, which is more than TFTP.
838 * To use sizeof in the internal unnamed structures, we need a real
839 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
840 * The compiler doesn't complain nor allocates the actual structure
842 static struct rpc_t rpc_specimen;
843 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
845 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
848 * this is the packet being assembled, either data or frag control.
849 * Fragments go by 8 bytes, so this union must be 8 bytes long
852 /* first_byte is address of this structure */
853 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
854 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
855 u16 prev_hole; /* index of prev, 0 == none */
859 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
861 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
862 static u16 first_hole, total_len;
863 struct hole *payload, *thisfrag, *h, *newh;
864 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
865 uchar *indata = (uchar *)ip;
866 int offset8, start, len, done = 0;
867 u16 ip_off = ntohs(ip->ip_off);
869 /* payload starts after IP header, this fragment is in there */
870 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
871 offset8 = (ip_off & IP_OFFS);
872 thisfrag = payload + offset8;
874 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
876 if (start + len > IP_MAXUDP) /* fragment extends too far */
879 if (!total_len || localip->ip_id != ip->ip_id) {
880 /* new (or different) packet, reset structs */
882 payload[0].last_byte = ~0;
883 payload[0].next_hole = 0;
884 payload[0].prev_hole = 0;
886 /* any IP header will work, copy the first we received */
887 memcpy(localip, ip, IP_HDR_SIZE);
891 * What follows is the reassembly algorithm. We use the payload
892 * array as a linked list of hole descriptors, as each hole starts
893 * at a multiple of 8 bytes. However, last byte can be whatever value,
894 * so it is represented as byte count, not as 8-byte blocks.
897 h = payload + first_hole;
898 while (h->last_byte < start) {
900 /* no hole that far away */
903 h = payload + h->next_hole;
906 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
907 if (offset8 + ((len + 7) / 8) <= h - payload) {
908 /* no overlap with holes (dup fragment?) */
912 if (!(ip_off & IP_FLAGS_MFRAG)) {
913 /* no more fragmentss: truncate this (last) hole */
914 total_len = start + len;
915 h->last_byte = start + len;
919 * There is some overlap: fix the hole list. This code doesn't
920 * deal with a fragment that overlaps with two different holes
921 * (thus being a superset of a previously-received fragment).
924 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
925 /* complete overlap with hole: remove hole */
926 if (!h->prev_hole && !h->next_hole) {
927 /* last remaining hole */
929 } else if (!h->prev_hole) {
931 first_hole = h->next_hole;
932 payload[h->next_hole].prev_hole = 0;
933 } else if (!h->next_hole) {
935 payload[h->prev_hole].next_hole = 0;
937 /* in the middle of the list */
938 payload[h->next_hole].prev_hole = h->prev_hole;
939 payload[h->prev_hole].next_hole = h->next_hole;
942 } else if (h->last_byte <= start + len) {
943 /* overlaps with final part of the hole: shorten this hole */
944 h->last_byte = start;
946 } else if (h >= thisfrag) {
947 /* overlaps with initial part of the hole: move this hole */
948 newh = thisfrag + (len / 8);
952 payload[h->next_hole].prev_hole = (h - payload);
954 payload[h->prev_hole].next_hole = (h - payload);
956 first_hole = (h - payload);
959 /* fragment sits in the middle: split the hole */
960 newh = thisfrag + (len / 8);
962 h->last_byte = start;
963 h->next_hole = (newh - payload);
964 newh->prev_hole = (h - payload);
966 payload[newh->next_hole].prev_hole = (newh - payload);
969 /* finally copy this fragment and possibly return whole packet */
970 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
974 localip->ip_len = htons(total_len);
975 *lenp = total_len + IP_HDR_SIZE;
979 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
982 u16 ip_off = ntohs(ip->ip_off);
983 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
984 return ip; /* not a fragment */
985 return __net_defragment(ip, lenp);
988 #else /* !CONFIG_IP_DEFRAG */
990 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
993 u16 ip_off = ntohs(ip->ip_off);
994 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
995 return ip; /* not a fragment */
1001 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1004 * @parma ip IP packet containing the ICMP
1006 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1007 struct in_addr src_ip, struct ethernet_hdr *et)
1009 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1011 switch (icmph->type) {
1013 if (icmph->code != ICMP_REDIR_HOST)
1015 printf(" ICMP Host Redirect to %pI4 ",
1016 &icmph->un.gateway);
1019 #if defined(CONFIG_CMD_PING)
1020 ping_receive(et, ip, len);
1022 #ifdef CONFIG_CMD_TFTPPUT
1023 if (packet_icmp_handler)
1024 packet_icmp_handler(icmph->type, icmph->code,
1025 ntohs(ip->udp_dst), src_ip,
1026 ntohs(ip->udp_src), icmph->un.data,
1027 ntohs(ip->udp_len));
1033 void net_process_received_packet(uchar *in_packet, int len)
1035 struct ethernet_hdr *et;
1036 struct ip_udp_hdr *ip;
1037 struct in_addr dst_ip;
1038 struct in_addr src_ip;
1040 #if defined(CONFIG_CMD_CDP)
1043 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1045 debug_cond(DEBUG_NET_PKT, "packet received\n");
1047 net_rx_packet = in_packet;
1048 net_rx_packet_len = len;
1049 et = (struct ethernet_hdr *)in_packet;
1051 /* too small packet? */
1052 if (len < ETHER_HDR_SIZE)
1057 (*push_packet)(in_packet, len);
1062 #if defined(CONFIG_CMD_CDP)
1063 /* keep track if packet is CDP */
1064 iscdp = is_cdp_packet(et->et_dest);
1067 myvlanid = ntohs(net_our_vlan);
1068 if (myvlanid == (ushort)-1)
1069 myvlanid = VLAN_NONE;
1070 mynvlanid = ntohs(net_native_vlan);
1071 if (mynvlanid == (ushort)-1)
1072 mynvlanid = VLAN_NONE;
1074 eth_proto = ntohs(et->et_protlen);
1076 if (eth_proto < 1514) {
1077 struct e802_hdr *et802 = (struct e802_hdr *)et;
1079 * Got a 802.2 packet. Check the other protocol field.
1080 * XXX VLAN over 802.2+SNAP not implemented!
1082 eth_proto = ntohs(et802->et_prot);
1084 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1085 len -= E802_HDR_SIZE;
1087 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1088 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1089 len -= ETHER_HDR_SIZE;
1091 } else { /* VLAN packet */
1092 struct vlan_ethernet_hdr *vet =
1093 (struct vlan_ethernet_hdr *)et;
1095 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1097 /* too small packet? */
1098 if (len < VLAN_ETHER_HDR_SIZE)
1101 /* if no VLAN active */
1102 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1103 #if defined(CONFIG_CMD_CDP)
1109 cti = ntohs(vet->vet_tag);
1110 vlanid = cti & VLAN_IDMASK;
1111 eth_proto = ntohs(vet->vet_type);
1113 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1114 len -= VLAN_ETHER_HDR_SIZE;
1117 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1119 #if defined(CONFIG_CMD_CDP)
1121 cdp_receive((uchar *)ip, len);
1126 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1127 if (vlanid == VLAN_NONE)
1128 vlanid = (mynvlanid & VLAN_IDMASK);
1130 if (vlanid != (myvlanid & VLAN_IDMASK))
1134 switch (eth_proto) {
1136 arp_receive(et, ip, len);
1139 #ifdef CONFIG_CMD_RARP
1141 rarp_receive(ip, len);
1145 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1146 /* Before we start poking the header, make sure it is there */
1147 if (len < IP_UDP_HDR_SIZE) {
1148 debug("len bad %d < %lu\n", len,
1149 (ulong)IP_UDP_HDR_SIZE);
1152 /* Check the packet length */
1153 if (len < ntohs(ip->ip_len)) {
1154 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1157 len = ntohs(ip->ip_len);
1158 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1159 len, ip->ip_hl_v & 0xff);
1161 /* Can't deal with anything except IPv4 */
1162 if ((ip->ip_hl_v & 0xf0) != 0x40)
1164 /* Can't deal with IP options (headers != 20 bytes) */
1165 if ((ip->ip_hl_v & 0x0f) > 0x05)
1167 /* Check the Checksum of the header */
1168 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1169 debug("checksum bad\n");
1172 /* If it is not for us, ignore it */
1173 dst_ip = net_read_ip(&ip->ip_dst);
1174 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1175 dst_ip.s_addr != 0xFFFFFFFF) {
1176 #ifdef CONFIG_MCAST_TFTP
1177 if (net_mcast_addr != dst_ip)
1181 /* Read source IP address for later use */
1182 src_ip = net_read_ip(&ip->ip_src);
1184 * The function returns the unchanged packet if it's not
1185 * a fragment, and either the complete packet or NULL if
1186 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1188 ip = net_defragment(ip, &len);
1192 * watch for ICMP host redirects
1194 * There is no real handler code (yet). We just watch
1195 * for ICMP host redirect messages. In case anybody
1196 * sees these messages: please contact me
1197 * (wd@denx.de), or - even better - send me the
1198 * necessary fixes :-)
1200 * Note: in all cases where I have seen this so far
1201 * it was a problem with the router configuration,
1202 * for instance when a router was configured in the
1203 * BOOTP reply, but the TFTP server was on the same
1204 * subnet. So this is probably a warning that your
1205 * configuration might be wrong. But I'm not really
1206 * sure if there aren't any other situations.
1208 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1209 * we send a tftp packet to a dead connection, or when
1210 * there is no server at the other end.
1212 if (ip->ip_p == IPPROTO_ICMP) {
1213 receive_icmp(ip, len, src_ip, et);
1215 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1219 debug_cond(DEBUG_DEV_PKT,
1220 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1221 &dst_ip, &src_ip, len);
1223 #ifdef CONFIG_UDP_CHECKSUM
1224 if (ip->udp_xsum != 0) {
1230 xsum += (ntohs(ip->udp_len));
1231 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1232 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1233 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1234 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1236 sumlen = ntohs(ip->udp_len);
1237 sumptr = (ushort *)&(ip->udp_src);
1239 while (sumlen > 1) {
1242 sumdata = *sumptr++;
1243 xsum += ntohs(sumdata);
1249 sumdata = *(unsigned char *)sumptr;
1250 sumdata = (sumdata << 8) & 0xff00;
1253 while ((xsum >> 16) != 0) {
1254 xsum = (xsum & 0x0000ffff) +
1255 ((xsum >> 16) & 0x0000ffff);
1257 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1258 printf(" UDP wrong checksum %08lx %08x\n",
1259 xsum, ntohs(ip->udp_xsum));
1265 #if defined(CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
1266 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1270 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1273 * IP header OK. Pass the packet to the current handler.
1275 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1279 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1284 /**********************************************************************/
1286 static int net_check_prereq(enum proto_t protocol)
1290 #if defined(CONFIG_CMD_PING)
1292 if (net_ping_ip.s_addr == 0) {
1293 puts("*** ERROR: ping address not given\n");
1298 #if defined(CONFIG_CMD_SNTP)
1300 if (net_ntp_server.s_addr == 0) {
1301 puts("*** ERROR: NTP server address not given\n");
1306 #if defined(CONFIG_CMD_DNS)
1308 if (net_dns_server.s_addr == 0) {
1309 puts("*** ERROR: DNS server address not given\n");
1314 #if defined(CONFIG_CMD_NFS)
1320 if (net_server_ip.s_addr == 0) {
1321 puts("*** ERROR: `serverip' not set\n");
1324 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1325 defined(CONFIG_CMD_DNS)
1332 if (net_ip.s_addr == 0) {
1333 puts("*** ERROR: `ipaddr' not set\n");
1338 #ifdef CONFIG_CMD_RARP
1345 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1346 int num = eth_get_dev_index();
1350 puts("*** ERROR: No ethernet found.\n");
1353 puts("*** ERROR: `ethaddr' not set\n");
1356 printf("*** ERROR: `eth%daddr' not set\n",
1370 /**********************************************************************/
1373 net_eth_hdr_size(void)
1377 myvlanid = ntohs(net_our_vlan);
1378 if (myvlanid == (ushort)-1)
1379 myvlanid = VLAN_NONE;
1381 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1382 VLAN_ETHER_HDR_SIZE;
1385 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1387 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1390 myvlanid = ntohs(net_our_vlan);
1391 if (myvlanid == (ushort)-1)
1392 myvlanid = VLAN_NONE;
1394 memcpy(et->et_dest, dest_ethaddr, 6);
1395 memcpy(et->et_src, net_ethaddr, 6);
1396 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1397 et->et_protlen = htons(prot);
1398 return ETHER_HDR_SIZE;
1400 struct vlan_ethernet_hdr *vet =
1401 (struct vlan_ethernet_hdr *)xet;
1403 vet->vet_vlan_type = htons(PROT_VLAN);
1404 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1405 vet->vet_type = htons(prot);
1406 return VLAN_ETHER_HDR_SIZE;
1410 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1414 memcpy(et->et_dest, addr, 6);
1415 memcpy(et->et_src, net_ethaddr, 6);
1416 protlen = ntohs(et->et_protlen);
1417 if (protlen == PROT_VLAN) {
1418 struct vlan_ethernet_hdr *vet =
1419 (struct vlan_ethernet_hdr *)et;
1420 vet->vet_type = htons(prot);
1421 return VLAN_ETHER_HDR_SIZE;
1422 } else if (protlen > 1514) {
1423 et->et_protlen = htons(prot);
1424 return ETHER_HDR_SIZE;
1427 struct e802_hdr *et802 = (struct e802_hdr *)et;
1428 et802->et_prot = htons(prot);
1429 return E802_HDR_SIZE;
1433 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source)
1435 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1438 * Construct an IP header.
1440 /* IP_HDR_SIZE / 4 (not including UDP) */
1443 ip->ip_len = htons(IP_HDR_SIZE);
1444 ip->ip_id = htons(net_ip_id++);
1445 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1448 /* already in network byte order */
1449 net_copy_ip((void *)&ip->ip_src, &source);
1450 /* already in network byte order */
1451 net_copy_ip((void *)&ip->ip_dst, &dest);
1454 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1457 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1460 * If the data is an odd number of bytes, zero the
1461 * byte after the last byte so that the checksum
1465 pkt[IP_UDP_HDR_SIZE + len] = 0;
1467 net_set_ip_header(pkt, dest, net_ip);
1468 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1469 ip->ip_p = IPPROTO_UDP;
1470 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1472 ip->udp_src = htons(sport);
1473 ip->udp_dst = htons(dport);
1474 ip->udp_len = htons(UDP_HDR_SIZE + len);
1478 void copy_filename(char *dst, const char *src, int size)
1480 if (*src && (*src == '"')) {
1485 while ((--size > 0) && *src && (*src != '"'))
1490 #if defined(CONFIG_CMD_NFS) || \
1491 defined(CONFIG_CMD_SNTP) || \
1492 defined(CONFIG_CMD_DNS)
1494 * make port a little random (1024-17407)
1495 * This keeps the math somewhat trivial to compute, and seems to work with
1496 * all supported protocols/clients/servers
1498 unsigned int random_port(void)
1500 return 1024 + (get_timer(0) % 0x4000);
1504 void ip_to_string(struct in_addr x, char *s)
1506 x.s_addr = ntohl(x.s_addr);
1507 sprintf(s, "%d.%d.%d.%d",
1508 (int) ((x.s_addr >> 24) & 0xff),
1509 (int) ((x.s_addr >> 16) & 0xff),
1510 (int) ((x.s_addr >> 8) & 0xff),
1511 (int) ((x.s_addr >> 0) & 0xff)
1515 void vlan_to_string(ushort x, char *s)
1519 if (x == (ushort)-1)
1525 sprintf(s, "%d", x & VLAN_IDMASK);
1528 ushort string_to_vlan(const char *s)
1533 return htons(VLAN_NONE);
1535 if (*s < '0' || *s > '9')
1538 id = (ushort)simple_strtoul(s, NULL, 10);
1543 ushort getenv_vlan(char *var)
1545 return string_to_vlan(getenv(var));