1 // SPDX-License-Identifier: GPL-2.0
3 * Copied from Linux Monitor (LiMon) - Networking.
5 * Copyright 1994 - 2000 Neil Russell.
7 * Copyright 2000 Roland Borde
8 * Copyright 2000 Paolo Scaffardi
9 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
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
84 * Prerequisites: - own ethernet address
85 * We want: - magic packet or timeout
94 #include <env_internal.h>
97 #include <net/fastboot.h>
99 #if defined(CONFIG_LED_STATUS)
101 #include <status_led.h>
103 #include <watchdog.h>
104 #include <linux/compiler.h>
108 #if defined(CONFIG_CMD_DNS)
111 #include "link_local.h"
115 #if defined(CONFIG_CMD_SNTP)
118 #if defined(CONFIG_CMD_WOL)
122 /** BOOTP EXTENTIONS **/
124 /* Our subnet mask (0=unknown) */
125 struct in_addr net_netmask;
126 /* Our gateways IP address */
127 struct in_addr net_gateway;
128 /* Our DNS IP address */
129 struct in_addr net_dns_server;
130 #if defined(CONFIG_BOOTP_DNS2)
131 /* Our 2nd DNS IP address */
132 struct in_addr net_dns_server2;
135 /** END OF BOOTP EXTENTIONS **/
137 /* Our ethernet address */
139 /* Boot server enet address */
140 u8 net_server_ethaddr[6];
141 /* Our IP addr (0 = unknown) */
142 struct in_addr net_ip;
143 /* Server IP addr (0 = unknown) */
144 struct in_addr net_server_ip;
145 /* Current receive packet */
146 uchar *net_rx_packet;
147 /* Current rx packet length */
148 int net_rx_packet_len;
150 static unsigned net_ip_id;
151 /* Ethernet bcast address */
152 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
153 const u8 net_null_ethaddr[6];
154 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
155 void (*push_packet)(void *, int len) = 0;
157 /* Network loop state */
158 enum net_loop_state net_state;
159 /* Tried all network devices */
160 int net_restart_wrap;
161 /* Network loop restarted */
162 static int net_restarted;
163 /* At least one device configured */
164 static int net_dev_exists;
166 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
167 /* default is without VLAN */
168 ushort net_our_vlan = 0xFFFF;
170 ushort net_native_vlan = 0xFFFF;
173 char net_boot_file_name[1024];
174 /* Indicates whether the file name was specified on the command line */
175 bool net_boot_file_name_explicit;
176 /* The actual transferred size of the bootfile (in bytes) */
177 u32 net_boot_file_size;
178 /* Boot file size in blocks as reported by the DHCP server */
179 u32 net_boot_file_expected_size_in_blocks;
181 #if defined(CONFIG_CMD_SNTP)
182 /* NTP server IP address */
183 struct in_addr net_ntp_server;
184 /* offset time from UTC */
185 int net_ntp_time_offset;
188 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
189 /* Receive packets */
190 uchar *net_rx_packets[PKTBUFSRX];
191 /* Current UDP RX packet handler */
192 static rxhand_f *udp_packet_handler;
193 /* Current ARP RX packet handler */
194 static rxhand_f *arp_packet_handler;
195 #ifdef CONFIG_CMD_TFTPPUT
196 /* Current ICMP rx handler */
197 static rxhand_icmp_f *packet_icmp_handler;
199 /* Current timeout handler */
200 static thand_f *time_handler;
201 /* Time base value */
202 static ulong time_start;
203 /* Current timeout value */
204 static ulong time_delta;
205 /* THE transmit packet */
206 uchar *net_tx_packet;
208 static int net_check_prereq(enum proto_t protocol);
210 static int net_try_count;
212 int __maybe_unused net_busy_flag;
214 /**********************************************************************/
216 static int on_ipaddr(const char *name, const char *value, enum env_op op,
219 if (flags & H_PROGRAMMATIC)
222 net_ip = string_to_ip(value);
226 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
228 static int on_gatewayip(const char *name, const char *value, enum env_op op,
231 if (flags & H_PROGRAMMATIC)
234 net_gateway = string_to_ip(value);
238 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
240 static int on_netmask(const char *name, const char *value, enum env_op op,
243 if (flags & H_PROGRAMMATIC)
246 net_netmask = string_to_ip(value);
250 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
252 static int on_serverip(const char *name, const char *value, enum env_op op,
255 if (flags & H_PROGRAMMATIC)
258 net_server_ip = string_to_ip(value);
262 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
264 static int on_nvlan(const char *name, const char *value, enum env_op op,
267 if (flags & H_PROGRAMMATIC)
270 net_native_vlan = string_to_vlan(value);
274 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
276 static int on_vlan(const char *name, const char *value, enum env_op op,
279 if (flags & H_PROGRAMMATIC)
282 net_our_vlan = string_to_vlan(value);
286 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
288 #if defined(CONFIG_CMD_DNS)
289 static int on_dnsip(const char *name, const char *value, enum env_op op,
292 if (flags & H_PROGRAMMATIC)
295 net_dns_server = string_to_ip(value);
299 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
303 * Check if autoload is enabled. If so, use either NFS or TFTP to download
306 void net_auto_load(void)
308 #if defined(CONFIG_CMD_NFS)
309 const char *s = env_get("autoload");
311 if (s != NULL && strcmp(s, "NFS") == 0) {
312 if (net_check_prereq(NFS)) {
313 /* We aren't expecting to get a serverip, so just accept the assigned IP */
314 #ifdef CONFIG_BOOTP_SERVERIP
315 net_set_state(NETLOOP_SUCCESS);
317 printf("Cannot autoload with NFS\n");
318 net_set_state(NETLOOP_FAIL);
323 * Use NFS to load the bootfile.
329 if (env_get_yesno("autoload") == 0) {
331 * Just use BOOTP/RARP to configure system;
332 * Do not use TFTP to load the bootfile.
334 net_set_state(NETLOOP_SUCCESS);
337 if (net_check_prereq(TFTPGET)) {
338 /* We aren't expecting to get a serverip, so just accept the assigned IP */
339 #ifdef CONFIG_BOOTP_SERVERIP
340 net_set_state(NETLOOP_SUCCESS);
342 printf("Cannot autoload with TFTPGET\n");
343 net_set_state(NETLOOP_FAIL);
350 static void net_init_loop(void)
353 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
358 static void net_clear_handlers(void)
360 net_set_udp_handler(NULL);
361 net_set_arp_handler(NULL);
362 net_set_timeout_handler(0, NULL);
365 static void net_cleanup_loop(void)
367 net_clear_handlers();
372 static int first_call = 1;
376 * Setup packet buffers, aligned correctly.
380 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
381 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
382 for (i = 0; i < PKTBUFSRX; i++) {
383 net_rx_packets[i] = net_tx_packet +
384 (i + 1) * PKTSIZE_ALIGN;
387 net_clear_handlers();
389 /* Only need to setup buffer pointers once. */
396 /**********************************************************************/
398 * Main network processing loop.
401 int net_loop(enum proto_t protocol)
404 enum net_loop_state prev_net_state = net_state;
409 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
411 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
413 if (eth_is_on_demand_init() || protocol != NETCONS) {
422 eth_init_state_only();
425 #ifdef CONFIG_USB_KEYBOARD
428 net_set_state(NETLOOP_CONTINUE);
431 * Start the ball rolling with the given start function. From
432 * here on, this code is a state machine driven by received
433 * packets and timer events.
435 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
438 switch (net_check_prereq(protocol)) {
440 /* network not configured */
442 net_set_state(prev_net_state);
446 /* network device not configured */
451 net_boot_file_size = 0;
454 #ifdef CONFIG_CMD_TFTPPUT
457 /* always use ARP to get server ethernet address */
458 tftp_start(protocol);
460 #ifdef CONFIG_CMD_TFTPSRV
465 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
467 fastboot_start_server();
470 #if defined(CONFIG_CMD_DHCP)
474 dhcp_request(); /* Basically same as BOOTP */
484 #if defined(CONFIG_CMD_RARP)
491 #if defined(CONFIG_CMD_PING)
496 #if defined(CONFIG_CMD_NFS)
501 #if defined(CONFIG_CMD_CDP)
506 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
511 #if defined(CONFIG_CMD_SNTP)
516 #if defined(CONFIG_CMD_DNS)
521 #if defined(CONFIG_CMD_LINK_LOCAL)
526 #if defined(CONFIG_CMD_WOL)
538 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
539 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
540 defined(CONFIG_LED_STATUS) && \
541 defined(CONFIG_LED_STATUS_RED)
543 * Echo the inverted link state to the fault LED.
545 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
546 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
548 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
549 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
550 #endif /* CONFIG_MII, ... */
551 #ifdef CONFIG_USB_KEYBOARD
556 * Main packet reception loop. Loop receiving packets until
557 * someone sets `net_state' to a state that terminates.
561 #ifdef CONFIG_SHOW_ACTIVITY
564 if (arp_timeout_check() > 0)
565 time_start = get_timer(0);
568 * Check the ethernet for a new packet. The ethernet
569 * receive routine will process it.
570 * Most drivers return the most recent packet size, but not
571 * errors that may have happened.
576 * Abort if ctrl-c was pressed.
579 /* cancel any ARP that may not have completed */
580 net_arp_wait_packet_ip.s_addr = 0;
584 /* Invalidate the last protocol */
585 eth_set_last_protocol(BOOTP);
588 /* include a debug print as well incase the debug
589 messages are directed to stderr */
590 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
596 * Check for a timeout, and run the timeout handler
600 ((get_timer(0) - time_start) > time_delta)) {
603 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
604 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
605 defined(CONFIG_LED_STATUS) && \
606 defined(CONFIG_LED_STATUS_RED)
608 * Echo the inverted link state to the fault LED.
610 if (miiphy_link(eth_get_dev()->name,
611 CONFIG_SYS_FAULT_MII_ADDR))
612 status_led_set(CONFIG_LED_STATUS_RED,
613 CONFIG_LED_STATUS_OFF);
615 status_led_set(CONFIG_LED_STATUS_RED,
616 CONFIG_LED_STATUS_ON);
617 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
618 #endif /* CONFIG_MII, ... */
619 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
621 time_handler = (thand_f *)0;
625 if (net_state == NETLOOP_FAIL)
626 ret = net_start_again();
629 case NETLOOP_RESTART:
633 case NETLOOP_SUCCESS:
635 if (net_boot_file_size > 0) {
636 printf("Bytes transferred = %d (%x hex)\n",
637 net_boot_file_size, net_boot_file_size);
638 env_set_hex("filesize", net_boot_file_size);
639 env_set_hex("fileaddr", load_addr);
641 if (protocol != NETCONS)
644 eth_halt_state_only();
646 eth_set_last_protocol(protocol);
648 ret = net_boot_file_size;
649 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
654 /* Invalidate the last protocol */
655 eth_set_last_protocol(BOOTP);
656 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
660 case NETLOOP_CONTINUE:
666 #ifdef CONFIG_USB_KEYBOARD
669 #ifdef CONFIG_CMD_TFTPPUT
670 /* Clear out the handlers */
671 net_set_udp_handler(NULL);
672 net_set_icmp_handler(NULL);
674 net_set_state(prev_net_state);
678 /**********************************************************************/
680 static void start_again_timeout_handler(void)
682 net_set_state(NETLOOP_RESTART);
685 int net_start_again(void)
688 int retry_forever = 0;
689 unsigned long retrycnt = 0;
692 nretry = env_get("netretry");
694 if (!strcmp(nretry, "yes"))
696 else if (!strcmp(nretry, "no"))
698 else if (!strcmp(nretry, "once"))
701 retrycnt = simple_strtoul(nretry, NULL, 0);
707 if ((!retry_forever) && (net_try_count > retrycnt)) {
709 net_set_state(NETLOOP_FAIL);
711 * We don't provide a way for the protocol to return an error,
712 * but this is almost always the reason.
720 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
721 eth_try_another(!net_restarted);
724 if (net_restart_wrap) {
725 net_restart_wrap = 0;
726 if (net_dev_exists) {
727 net_set_timeout_handler(10000UL,
728 start_again_timeout_handler);
729 net_set_udp_handler(NULL);
731 net_set_state(NETLOOP_FAIL);
734 net_set_state(NETLOOP_RESTART);
739 /**********************************************************************/
744 static void dummy_handler(uchar *pkt, unsigned dport,
745 struct in_addr sip, unsigned sport,
750 rxhand_f *net_get_udp_handler(void)
752 return udp_packet_handler;
755 void net_set_udp_handler(rxhand_f *f)
757 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
759 udp_packet_handler = dummy_handler;
761 udp_packet_handler = f;
764 rxhand_f *net_get_arp_handler(void)
766 return arp_packet_handler;
769 void net_set_arp_handler(rxhand_f *f)
771 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
773 arp_packet_handler = dummy_handler;
775 arp_packet_handler = f;
778 #ifdef CONFIG_CMD_TFTPPUT
779 void net_set_icmp_handler(rxhand_icmp_f *f)
781 packet_icmp_handler = f;
785 void net_set_timeout_handler(ulong iv, thand_f *f)
788 debug_cond(DEBUG_INT_STATE,
789 "--- net_loop timeout handler cancelled\n");
790 time_handler = (thand_f *)0;
792 debug_cond(DEBUG_INT_STATE,
793 "--- net_loop timeout handler set (%p)\n", f);
795 time_start = get_timer(0);
796 time_delta = iv * CONFIG_SYS_HZ / 1000;
800 uchar *net_get_async_tx_pkt_buf(void)
802 if (arp_is_waiting())
803 return arp_tx_packet; /* If we are waiting, we already sent */
805 return net_tx_packet;
808 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
811 return net_send_ip_packet(ether, dest, dport, sport, payload_len,
812 IPPROTO_UDP, 0, 0, 0);
815 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
816 int payload_len, int proto, u8 action, u32 tcp_seq_num,
823 /* make sure the net_tx_packet is initialized (net_init() was called) */
824 assert(net_tx_packet != NULL);
825 if (net_tx_packet == NULL)
828 /* convert to new style broadcast */
829 if (dest.s_addr == 0)
830 dest.s_addr = 0xFFFFFFFF;
832 /* if broadcast, make the ether address a broadcast and don't do ARP */
833 if (dest.s_addr == 0xFFFFFFFF)
834 ether = (uchar *)net_bcast_ethaddr;
836 pkt = (uchar *)net_tx_packet;
838 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
842 net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
844 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
850 /* if MAC address was not discovered yet, do an ARP request */
851 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
852 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
854 /* save the ip and eth addr for the packet to send after arp */
855 net_arp_wait_packet_ip = dest;
856 arp_wait_packet_ethaddr = ether;
858 /* size of the waiting packet */
859 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
861 /* and do the ARP request */
863 arp_wait_timer_start = get_timer(0);
865 return 1; /* waiting */
867 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
869 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
870 return 0; /* transmitted */
874 #ifdef CONFIG_IP_DEFRAG
876 * This function collects fragments in a single packet, according
877 * to the algorithm in RFC815. It returns NULL or the pointer to
878 * a complete packet, in static storage
880 #ifndef CONFIG_NET_MAXDEFRAG
881 #define CONFIG_NET_MAXDEFRAG 16384
883 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
885 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
888 * this is the packet being assembled, either data or frag control.
889 * Fragments go by 8 bytes, so this union must be 8 bytes long
892 /* first_byte is address of this structure */
893 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
894 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
895 u16 prev_hole; /* index of prev, 0 == none */
899 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
901 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
902 static u16 first_hole, total_len;
903 struct hole *payload, *thisfrag, *h, *newh;
904 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
905 uchar *indata = (uchar *)ip;
906 int offset8, start, len, done = 0;
907 u16 ip_off = ntohs(ip->ip_off);
909 /* payload starts after IP header, this fragment is in there */
910 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
911 offset8 = (ip_off & IP_OFFS);
912 thisfrag = payload + offset8;
914 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
916 if (start + len > IP_MAXUDP) /* fragment extends too far */
919 if (!total_len || localip->ip_id != ip->ip_id) {
920 /* new (or different) packet, reset structs */
922 payload[0].last_byte = ~0;
923 payload[0].next_hole = 0;
924 payload[0].prev_hole = 0;
926 /* any IP header will work, copy the first we received */
927 memcpy(localip, ip, IP_HDR_SIZE);
931 * What follows is the reassembly algorithm. We use the payload
932 * array as a linked list of hole descriptors, as each hole starts
933 * at a multiple of 8 bytes. However, last byte can be whatever value,
934 * so it is represented as byte count, not as 8-byte blocks.
937 h = payload + first_hole;
938 while (h->last_byte < start) {
940 /* no hole that far away */
943 h = payload + h->next_hole;
946 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
947 if (offset8 + ((len + 7) / 8) <= h - payload) {
948 /* no overlap with holes (dup fragment?) */
952 if (!(ip_off & IP_FLAGS_MFRAG)) {
953 /* no more fragmentss: truncate this (last) hole */
954 total_len = start + len;
955 h->last_byte = start + len;
959 * There is some overlap: fix the hole list. This code doesn't
960 * deal with a fragment that overlaps with two different holes
961 * (thus being a superset of a previously-received fragment).
964 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
965 /* complete overlap with hole: remove hole */
966 if (!h->prev_hole && !h->next_hole) {
967 /* last remaining hole */
969 } else if (!h->prev_hole) {
971 first_hole = h->next_hole;
972 payload[h->next_hole].prev_hole = 0;
973 } else if (!h->next_hole) {
975 payload[h->prev_hole].next_hole = 0;
977 /* in the middle of the list */
978 payload[h->next_hole].prev_hole = h->prev_hole;
979 payload[h->prev_hole].next_hole = h->next_hole;
982 } else if (h->last_byte <= start + len) {
983 /* overlaps with final part of the hole: shorten this hole */
984 h->last_byte = start;
986 } else if (h >= thisfrag) {
987 /* overlaps with initial part of the hole: move this hole */
988 newh = thisfrag + (len / 8);
992 payload[h->next_hole].prev_hole = (h - payload);
994 payload[h->prev_hole].next_hole = (h - payload);
996 first_hole = (h - payload);
999 /* fragment sits in the middle: split the hole */
1000 newh = thisfrag + (len / 8);
1002 h->last_byte = start;
1003 h->next_hole = (newh - payload);
1004 newh->prev_hole = (h - payload);
1005 if (newh->next_hole)
1006 payload[newh->next_hole].prev_hole = (newh - payload);
1009 /* finally copy this fragment and possibly return whole packet */
1010 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
1014 localip->ip_len = htons(total_len);
1015 *lenp = total_len + IP_HDR_SIZE;
1019 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1022 u16 ip_off = ntohs(ip->ip_off);
1023 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1024 return ip; /* not a fragment */
1025 return __net_defragment(ip, lenp);
1028 #else /* !CONFIG_IP_DEFRAG */
1030 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1033 u16 ip_off = ntohs(ip->ip_off);
1034 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1035 return ip; /* not a fragment */
1041 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1044 * @parma ip IP packet containing the ICMP
1046 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1047 struct in_addr src_ip, struct ethernet_hdr *et)
1049 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1051 switch (icmph->type) {
1053 if (icmph->code != ICMP_REDIR_HOST)
1055 printf(" ICMP Host Redirect to %pI4 ",
1056 &icmph->un.gateway);
1059 #if defined(CONFIG_CMD_PING)
1060 ping_receive(et, ip, len);
1062 #ifdef CONFIG_CMD_TFTPPUT
1063 if (packet_icmp_handler)
1064 packet_icmp_handler(icmph->type, icmph->code,
1065 ntohs(ip->udp_dst), src_ip,
1066 ntohs(ip->udp_src), icmph->un.data,
1067 ntohs(ip->udp_len));
1073 void net_process_received_packet(uchar *in_packet, int len)
1075 struct ethernet_hdr *et;
1076 struct ip_udp_hdr *ip;
1077 struct in_addr dst_ip;
1078 struct in_addr src_ip;
1080 #if defined(CONFIG_CMD_CDP)
1083 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1085 debug_cond(DEBUG_NET_PKT, "packet received\n");
1087 net_rx_packet = in_packet;
1088 net_rx_packet_len = len;
1089 et = (struct ethernet_hdr *)in_packet;
1091 /* too small packet? */
1092 if (len < ETHER_HDR_SIZE)
1095 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1097 (*push_packet)(in_packet, len);
1102 #if defined(CONFIG_CMD_CDP)
1103 /* keep track if packet is CDP */
1104 iscdp = is_cdp_packet(et->et_dest);
1107 myvlanid = ntohs(net_our_vlan);
1108 if (myvlanid == (ushort)-1)
1109 myvlanid = VLAN_NONE;
1110 mynvlanid = ntohs(net_native_vlan);
1111 if (mynvlanid == (ushort)-1)
1112 mynvlanid = VLAN_NONE;
1114 eth_proto = ntohs(et->et_protlen);
1116 if (eth_proto < 1514) {
1117 struct e802_hdr *et802 = (struct e802_hdr *)et;
1119 * Got a 802.2 packet. Check the other protocol field.
1120 * XXX VLAN over 802.2+SNAP not implemented!
1122 eth_proto = ntohs(et802->et_prot);
1124 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1125 len -= E802_HDR_SIZE;
1127 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1128 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1129 len -= ETHER_HDR_SIZE;
1131 } else { /* VLAN packet */
1132 struct vlan_ethernet_hdr *vet =
1133 (struct vlan_ethernet_hdr *)et;
1135 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1137 /* too small packet? */
1138 if (len < VLAN_ETHER_HDR_SIZE)
1141 /* if no VLAN active */
1142 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1143 #if defined(CONFIG_CMD_CDP)
1149 cti = ntohs(vet->vet_tag);
1150 vlanid = cti & VLAN_IDMASK;
1151 eth_proto = ntohs(vet->vet_type);
1153 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1154 len -= VLAN_ETHER_HDR_SIZE;
1157 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1159 #if defined(CONFIG_CMD_CDP)
1161 cdp_receive((uchar *)ip, len);
1166 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1167 if (vlanid == VLAN_NONE)
1168 vlanid = (mynvlanid & VLAN_IDMASK);
1170 if (vlanid != (myvlanid & VLAN_IDMASK))
1174 switch (eth_proto) {
1176 arp_receive(et, ip, len);
1179 #ifdef CONFIG_CMD_RARP
1181 rarp_receive(ip, len);
1185 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1186 /* Before we start poking the header, make sure it is there */
1187 if (len < IP_UDP_HDR_SIZE) {
1188 debug("len bad %d < %lu\n", len,
1189 (ulong)IP_UDP_HDR_SIZE);
1192 /* Check the packet length */
1193 if (len < ntohs(ip->ip_len)) {
1194 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1197 len = ntohs(ip->ip_len);
1198 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1199 len, ip->ip_hl_v & 0xff);
1201 /* Can't deal with anything except IPv4 */
1202 if ((ip->ip_hl_v & 0xf0) != 0x40)
1204 /* Can't deal with IP options (headers != 20 bytes) */
1205 if ((ip->ip_hl_v & 0x0f) > 0x05)
1207 /* Check the Checksum of the header */
1208 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1209 debug("checksum bad\n");
1212 /* If it is not for us, ignore it */
1213 dst_ip = net_read_ip(&ip->ip_dst);
1214 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1215 dst_ip.s_addr != 0xFFFFFFFF) {
1218 /* Read source IP address for later use */
1219 src_ip = net_read_ip(&ip->ip_src);
1221 * The function returns the unchanged packet if it's not
1222 * a fragment, and either the complete packet or NULL if
1223 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1225 ip = net_defragment(ip, &len);
1229 * watch for ICMP host redirects
1231 * There is no real handler code (yet). We just watch
1232 * for ICMP host redirect messages. In case anybody
1233 * sees these messages: please contact me
1234 * (wd@denx.de), or - even better - send me the
1235 * necessary fixes :-)
1237 * Note: in all cases where I have seen this so far
1238 * it was a problem with the router configuration,
1239 * for instance when a router was configured in the
1240 * BOOTP reply, but the TFTP server was on the same
1241 * subnet. So this is probably a warning that your
1242 * configuration might be wrong. But I'm not really
1243 * sure if there aren't any other situations.
1245 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1246 * we send a tftp packet to a dead connection, or when
1247 * there is no server at the other end.
1249 if (ip->ip_p == IPPROTO_ICMP) {
1250 receive_icmp(ip, len, src_ip, et);
1252 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1256 debug_cond(DEBUG_DEV_PKT,
1257 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1258 &dst_ip, &src_ip, len);
1260 #ifdef CONFIG_UDP_CHECKSUM
1261 if (ip->udp_xsum != 0) {
1267 xsum += (ntohs(ip->udp_len));
1268 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1269 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1270 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1271 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1273 sumlen = ntohs(ip->udp_len);
1274 sumptr = (ushort *)&(ip->udp_src);
1276 while (sumlen > 1) {
1279 sumdata = *sumptr++;
1280 xsum += ntohs(sumdata);
1286 sumdata = *(unsigned char *)sumptr;
1287 sumdata = (sumdata << 8) & 0xff00;
1290 while ((xsum >> 16) != 0) {
1291 xsum = (xsum & 0x0000ffff) +
1292 ((xsum >> 16) & 0x0000ffff);
1294 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1295 printf(" UDP wrong checksum %08lx %08x\n",
1296 xsum, ntohs(ip->udp_xsum));
1302 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
1303 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1307 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1310 * IP header OK. Pass the packet to the current handler.
1312 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1316 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1318 #ifdef CONFIG_CMD_WOL
1320 wol_receive(ip, len);
1326 /**********************************************************************/
1328 static int net_check_prereq(enum proto_t protocol)
1332 #if defined(CONFIG_CMD_PING)
1334 if (net_ping_ip.s_addr == 0) {
1335 puts("*** ERROR: ping address not given\n");
1340 #if defined(CONFIG_CMD_SNTP)
1342 if (net_ntp_server.s_addr == 0) {
1343 puts("*** ERROR: NTP server address not given\n");
1348 #if defined(CONFIG_CMD_DNS)
1350 if (net_dns_server.s_addr == 0) {
1351 puts("*** ERROR: DNS server address not given\n");
1356 #if defined(CONFIG_CMD_NFS)
1362 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
1363 puts("*** ERROR: `serverip' not set\n");
1366 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1367 defined(CONFIG_CMD_DNS)
1375 if (net_ip.s_addr == 0) {
1376 puts("*** ERROR: `ipaddr' not set\n");
1381 #ifdef CONFIG_CMD_RARP
1388 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1389 int num = eth_get_dev_index();
1393 puts("*** ERROR: No ethernet found.\n");
1396 puts("*** ERROR: `ethaddr' not set\n");
1399 printf("*** ERROR: `eth%daddr' not set\n",
1413 /**********************************************************************/
1416 net_eth_hdr_size(void)
1420 myvlanid = ntohs(net_our_vlan);
1421 if (myvlanid == (ushort)-1)
1422 myvlanid = VLAN_NONE;
1424 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1425 VLAN_ETHER_HDR_SIZE;
1428 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1430 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1433 myvlanid = ntohs(net_our_vlan);
1434 if (myvlanid == (ushort)-1)
1435 myvlanid = VLAN_NONE;
1437 memcpy(et->et_dest, dest_ethaddr, 6);
1438 memcpy(et->et_src, net_ethaddr, 6);
1439 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1440 et->et_protlen = htons(prot);
1441 return ETHER_HDR_SIZE;
1443 struct vlan_ethernet_hdr *vet =
1444 (struct vlan_ethernet_hdr *)xet;
1446 vet->vet_vlan_type = htons(PROT_VLAN);
1447 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1448 vet->vet_type = htons(prot);
1449 return VLAN_ETHER_HDR_SIZE;
1453 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1457 memcpy(et->et_dest, addr, 6);
1458 memcpy(et->et_src, net_ethaddr, 6);
1459 protlen = ntohs(et->et_protlen);
1460 if (protlen == PROT_VLAN) {
1461 struct vlan_ethernet_hdr *vet =
1462 (struct vlan_ethernet_hdr *)et;
1463 vet->vet_type = htons(prot);
1464 return VLAN_ETHER_HDR_SIZE;
1465 } else if (protlen > 1514) {
1466 et->et_protlen = htons(prot);
1467 return ETHER_HDR_SIZE;
1470 struct e802_hdr *et802 = (struct e802_hdr *)et;
1471 et802->et_prot = htons(prot);
1472 return E802_HDR_SIZE;
1476 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
1477 u16 pkt_len, u8 proto)
1479 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1482 * Construct an IP header.
1484 /* IP_HDR_SIZE / 4 (not including UDP) */
1487 ip->ip_len = htons(pkt_len);
1489 ip->ip_id = htons(net_ip_id++);
1490 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1493 /* already in network byte order */
1494 net_copy_ip((void *)&ip->ip_src, &source);
1495 /* already in network byte order */
1496 net_copy_ip((void *)&ip->ip_dst, &dest);
1498 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1501 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1504 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1507 * If the data is an odd number of bytes, zero the
1508 * byte after the last byte so that the checksum
1512 pkt[IP_UDP_HDR_SIZE + len] = 0;
1514 net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
1517 ip->udp_src = htons(sport);
1518 ip->udp_dst = htons(dport);
1519 ip->udp_len = htons(UDP_HDR_SIZE + len);
1523 void copy_filename(char *dst, const char *src, int size)
1525 if (src && *src && (*src == '"')) {
1530 while ((--size > 0) && src && *src && (*src != '"'))
1535 int is_serverip_in_cmd(void)
1537 return !!strchr(net_boot_file_name, ':');
1540 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
1544 if (net_boot_file_name[0] == '\0')
1547 colon = strchr(net_boot_file_name, ':');
1550 *ipaddr = string_to_ip(net_boot_file_name);
1551 strncpy(filename, colon + 1, max_len);
1553 strncpy(filename, net_boot_file_name, max_len);
1555 filename[max_len - 1] = '\0';
1560 #if defined(CONFIG_CMD_NFS) || \
1561 defined(CONFIG_CMD_SNTP) || \
1562 defined(CONFIG_CMD_DNS)
1564 * make port a little random (1024-17407)
1565 * This keeps the math somewhat trivial to compute, and seems to work with
1566 * all supported protocols/clients/servers
1568 unsigned int random_port(void)
1570 return 1024 + (get_timer(0) % 0x4000);
1574 void ip_to_string(struct in_addr x, char *s)
1576 x.s_addr = ntohl(x.s_addr);
1577 sprintf(s, "%d.%d.%d.%d",
1578 (int) ((x.s_addr >> 24) & 0xff),
1579 (int) ((x.s_addr >> 16) & 0xff),
1580 (int) ((x.s_addr >> 8) & 0xff),
1581 (int) ((x.s_addr >> 0) & 0xff)
1585 void vlan_to_string(ushort x, char *s)
1589 if (x == (ushort)-1)
1595 sprintf(s, "%d", x & VLAN_IDMASK);
1598 ushort string_to_vlan(const char *s)
1603 return htons(VLAN_NONE);
1605 if (*s < '0' || *s > '9')
1608 id = (ushort)simple_strtoul(s, NULL, 10);
1613 ushort env_get_vlan(char *var)
1615 return string_to_vlan(env_get(var));
1618 void eth_parse_enetaddr(const char *addr, uint8_t *enetaddr)
1623 for (i = 0; i < 6; ++i) {
1624 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
1626 addr = (*end) ? end + 1 : end;