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
78 * Prerequisites: - own ethernet address
79 * We want: - magic packet or timeout
85 #include <bootstage.h>
89 #include <env_internal.h>
94 #include <net/fastboot.h>
97 #if defined(CONFIG_CMD_PCAP)
101 #if defined(CONFIG_LED_STATUS)
103 #include <status_led.h>
105 #include <watchdog.h>
106 #include <linux/compiler.h>
110 #if defined(CONFIG_CMD_DNS)
113 #include "link_local.h"
117 #if defined(CONFIG_CMD_WOL)
121 /** BOOTP EXTENTIONS **/
123 /* Our subnet mask (0=unknown) */
124 struct in_addr net_netmask;
125 /* Our gateways IP address */
126 struct in_addr net_gateway;
127 /* Our DNS IP address */
128 struct in_addr net_dns_server;
129 #if defined(CONFIG_BOOTP_DNS2)
130 /* Our 2nd DNS IP address */
131 struct in_addr net_dns_server2;
134 /** END OF BOOTP EXTENTIONS **/
136 /* Our ethernet address */
138 /* Boot server enet address */
139 u8 net_server_ethaddr[6];
140 /* Our IP addr (0 = unknown) */
141 struct in_addr net_ip;
142 /* Server IP addr (0 = unknown) */
143 struct in_addr net_server_ip;
144 /* Current receive packet */
145 uchar *net_rx_packet;
146 /* Current rx packet length */
147 int net_rx_packet_len;
149 static unsigned net_ip_id;
150 /* Ethernet bcast address */
151 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
152 const u8 net_null_ethaddr[6];
153 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
154 void (*push_packet)(void *, int len) = 0;
156 /* Network loop state */
157 enum net_loop_state net_state;
158 /* Tried all network devices */
159 int net_restart_wrap;
160 /* Network loop restarted */
161 static int net_restarted;
162 /* At least one device configured */
163 static int net_dev_exists;
165 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
166 /* default is without VLAN */
167 ushort net_our_vlan = 0xFFFF;
169 ushort net_native_vlan = 0xFFFF;
172 char net_boot_file_name[1024];
173 /* Indicates whether the file name was specified on the command line */
174 bool net_boot_file_name_explicit;
175 /* The actual transferred size of the bootfile (in bytes) */
176 u32 net_boot_file_size;
177 /* Boot file size in blocks as reported by the DHCP server */
178 u32 net_boot_file_expected_size_in_blocks;
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_ipaddr(const char *name, const char *value, enum env_op op,
211 if (flags & H_PROGRAMMATIC)
214 net_ip = string_to_ip(value);
218 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
220 static int on_gatewayip(const char *name, const char *value, enum env_op op,
223 if (flags & H_PROGRAMMATIC)
226 net_gateway = string_to_ip(value);
230 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
232 static int on_netmask(const char *name, const char *value, enum env_op op,
235 if (flags & H_PROGRAMMATIC)
238 net_netmask = string_to_ip(value);
242 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
244 static int on_serverip(const char *name, const char *value, enum env_op op,
247 if (flags & H_PROGRAMMATIC)
250 net_server_ip = string_to_ip(value);
254 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
256 static int on_nvlan(const char *name, const char *value, enum env_op op,
259 if (flags & H_PROGRAMMATIC)
262 net_native_vlan = string_to_vlan(value);
266 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
268 static int on_vlan(const char *name, const char *value, enum env_op op,
271 if (flags & H_PROGRAMMATIC)
274 net_our_vlan = string_to_vlan(value);
278 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
280 #if defined(CONFIG_CMD_DNS)
281 static int on_dnsip(const char *name, const char *value, enum env_op op,
284 if (flags & H_PROGRAMMATIC)
287 net_dns_server = string_to_ip(value);
291 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
295 * Check if autoload is enabled. If so, use either NFS or TFTP to download
298 void net_auto_load(void)
300 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
301 const char *s = env_get("autoload");
303 if (s != NULL && strcmp(s, "NFS") == 0) {
304 if (net_check_prereq(NFS)) {
305 /* We aren't expecting to get a serverip, so just accept the assigned IP */
306 if (IS_ENABLED(CONFIG_BOOTP_SERVERIP)) {
307 net_set_state(NETLOOP_SUCCESS);
309 printf("Cannot autoload with NFS\n");
310 net_set_state(NETLOOP_FAIL);
315 * Use NFS to load the bootfile.
321 if (env_get_yesno("autoload") == 0) {
323 * Just use BOOTP/RARP to configure system;
324 * Do not use TFTP to load the bootfile.
326 net_set_state(NETLOOP_SUCCESS);
329 if (net_check_prereq(TFTPGET)) {
330 /* We aren't expecting to get a serverip, so just accept the assigned IP */
331 if (IS_ENABLED(CONFIG_BOOTP_SERVERIP)) {
332 net_set_state(NETLOOP_SUCCESS);
334 printf("Cannot autoload with TFTPGET\n");
335 net_set_state(NETLOOP_FAIL);
342 static int net_init_loop(void)
345 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
348 * Not ideal, but there's no way to get the actual error, and I
349 * don't feel like fixing all the users of eth_get_dev to deal
357 static void net_clear_handlers(void)
359 net_set_udp_handler(NULL);
360 net_set_arp_handler(NULL);
361 net_set_timeout_handler(0, NULL);
364 static void net_cleanup_loop(void)
366 net_clear_handlers();
371 static int first_call = 1;
375 * Setup packet buffers, aligned correctly.
379 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
380 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
381 for (i = 0; i < PKTBUFSRX; i++) {
382 net_rx_packets[i] = net_tx_packet +
383 (i + 1) * PKTSIZE_ALIGN;
386 net_clear_handlers();
388 /* Only need to setup buffer pointers once. */
392 return net_init_loop();
395 /**********************************************************************/
397 * Main network processing loop.
400 int net_loop(enum proto_t protocol)
403 enum net_loop_state prev_net_state = net_state;
405 #if defined(CONFIG_CMD_PING)
406 if (protocol != PING)
407 net_ping_ip.s_addr = 0;
412 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
414 #ifdef CONFIG_PHY_NCSI
415 if (phy_interface_is_ncsi() && protocol != NCSI && !ncsi_active()) {
416 printf("%s: configuring NCSI first\n", __func__);
417 if (net_loop(NCSI) < 0)
419 eth_init_state_only();
424 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
426 if (eth_is_on_demand_init()) {
435 eth_init_state_only();
439 #ifdef CONFIG_USB_KEYBOARD
442 net_set_state(NETLOOP_CONTINUE);
445 * Start the ball rolling with the given start function. From
446 * here on, this code is a state machine driven by received
447 * packets and timer events.
449 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
452 switch (net_check_prereq(protocol)) {
454 /* network not configured */
456 net_set_state(prev_net_state);
460 /* network device not configured */
465 net_boot_file_size = 0;
467 #ifdef CONFIG_CMD_TFTPBOOT
469 #ifdef CONFIG_CMD_TFTPPUT
472 /* always use ARP to get server ethernet address */
473 tftp_start(protocol);
476 #ifdef CONFIG_CMD_TFTPSRV
481 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
483 fastboot_start_server();
486 #if defined(CONFIG_CMD_DHCP)
490 dhcp_request(); /* Basically same as BOOTP */
493 #if defined(CONFIG_CMD_BOOTP)
500 #if defined(CONFIG_CMD_RARP)
507 #if defined(CONFIG_CMD_PING)
512 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
517 #if defined(CONFIG_CMD_CDP)
522 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
527 #if defined(CONFIG_CMD_DNS)
532 #if defined(CONFIG_CMD_LINK_LOCAL)
537 #if defined(CONFIG_CMD_WOL)
542 #if defined(CONFIG_PHY_NCSI)
544 ncsi_probe_packages();
551 if (IS_ENABLED(CONFIG_PROT_UDP) && protocol == UDP)
557 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
558 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
559 defined(CONFIG_LED_STATUS) && \
560 defined(CONFIG_LED_STATUS_RED)
562 * Echo the inverted link state to the fault LED.
564 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
565 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
567 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
568 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
569 #endif /* CONFIG_MII, ... */
570 #ifdef CONFIG_USB_KEYBOARD
575 * Main packet reception loop. Loop receiving packets until
576 * someone sets `net_state' to a state that terminates.
580 if (arp_timeout_check() > 0)
581 time_start = get_timer(0);
584 * Check the ethernet for a new packet. The ethernet
585 * receive routine will process it.
586 * Most drivers return the most recent packet size, but not
587 * errors that may have happened.
592 * Abort if ctrl-c was pressed.
595 /* cancel any ARP that may not have completed */
596 net_arp_wait_packet_ip.s_addr = 0;
600 /* Invalidate the last protocol */
601 eth_set_last_protocol(BOOTP);
604 /* include a debug print as well incase the debug
605 messages are directed to stderr */
606 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
612 * Check for a timeout, and run the timeout handler
616 ((get_timer(0) - time_start) > time_delta)) {
619 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
620 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
621 defined(CONFIG_LED_STATUS) && \
622 defined(CONFIG_LED_STATUS_RED)
624 * Echo the inverted link state to the fault LED.
626 if (miiphy_link(eth_get_dev()->name,
627 CONFIG_SYS_FAULT_MII_ADDR))
628 status_led_set(CONFIG_LED_STATUS_RED,
629 CONFIG_LED_STATUS_OFF);
631 status_led_set(CONFIG_LED_STATUS_RED,
632 CONFIG_LED_STATUS_ON);
633 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
634 #endif /* CONFIG_MII, ... */
635 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
637 time_handler = (thand_f *)0;
641 if (net_state == NETLOOP_FAIL)
642 ret = net_start_again();
645 case NETLOOP_RESTART:
649 case NETLOOP_SUCCESS:
651 if (net_boot_file_size > 0) {
652 printf("Bytes transferred = %d (%x hex)\n",
653 net_boot_file_size, net_boot_file_size);
654 env_set_hex("filesize", net_boot_file_size);
655 env_set_hex("fileaddr", image_load_addr);
657 if (protocol != NETCONS && protocol != NCSI)
660 eth_halt_state_only();
662 eth_set_last_protocol(protocol);
664 ret = net_boot_file_size;
665 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
670 /* Invalidate the last protocol */
671 eth_set_last_protocol(BOOTP);
672 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
676 case NETLOOP_CONTINUE:
682 #ifdef CONFIG_USB_KEYBOARD
685 #ifdef CONFIG_CMD_TFTPPUT
686 /* Clear out the handlers */
687 net_set_udp_handler(NULL);
688 net_set_icmp_handler(NULL);
690 net_set_state(prev_net_state);
692 #if defined(CONFIG_CMD_PCAP)
699 /**********************************************************************/
701 static void start_again_timeout_handler(void)
703 net_set_state(NETLOOP_RESTART);
706 int net_start_again(void)
709 int retry_forever = 0;
710 unsigned long retrycnt = 0;
713 nretry = env_get("netretry");
715 if (!strcmp(nretry, "yes"))
717 else if (!strcmp(nretry, "no"))
719 else if (!strcmp(nretry, "once"))
722 retrycnt = simple_strtoul(nretry, NULL, 0);
728 if ((!retry_forever) && (net_try_count > retrycnt)) {
730 net_set_state(NETLOOP_FAIL);
732 * We don't provide a way for the protocol to return an error,
733 * but this is almost always the reason.
741 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
742 eth_try_another(!net_restarted);
745 if (net_restart_wrap) {
746 net_restart_wrap = 0;
747 if (net_dev_exists) {
748 net_set_timeout_handler(10000UL,
749 start_again_timeout_handler);
750 net_set_udp_handler(NULL);
752 net_set_state(NETLOOP_FAIL);
755 net_set_state(NETLOOP_RESTART);
760 /**********************************************************************/
765 static void dummy_handler(uchar *pkt, unsigned dport,
766 struct in_addr sip, unsigned sport,
771 rxhand_f *net_get_udp_handler(void)
773 return udp_packet_handler;
776 void net_set_udp_handler(rxhand_f *f)
778 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
780 udp_packet_handler = dummy_handler;
782 udp_packet_handler = f;
785 rxhand_f *net_get_arp_handler(void)
787 return arp_packet_handler;
790 void net_set_arp_handler(rxhand_f *f)
792 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
794 arp_packet_handler = dummy_handler;
796 arp_packet_handler = f;
799 #ifdef CONFIG_CMD_TFTPPUT
800 void net_set_icmp_handler(rxhand_icmp_f *f)
802 packet_icmp_handler = f;
806 void net_set_timeout_handler(ulong iv, thand_f *f)
809 debug_cond(DEBUG_INT_STATE,
810 "--- net_loop timeout handler cancelled\n");
811 time_handler = (thand_f *)0;
813 debug_cond(DEBUG_INT_STATE,
814 "--- net_loop timeout handler set (%p)\n", f);
816 time_start = get_timer(0);
817 time_delta = iv * CONFIG_SYS_HZ / 1000;
821 uchar *net_get_async_tx_pkt_buf(void)
823 if (arp_is_waiting())
824 return arp_tx_packet; /* If we are waiting, we already sent */
826 return net_tx_packet;
829 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
832 return net_send_ip_packet(ether, dest, dport, sport, payload_len,
833 IPPROTO_UDP, 0, 0, 0);
836 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
837 int payload_len, int proto, u8 action, u32 tcp_seq_num,
844 /* make sure the net_tx_packet is initialized (net_init() was called) */
845 assert(net_tx_packet != NULL);
846 if (net_tx_packet == NULL)
849 /* convert to new style broadcast */
850 if (dest.s_addr == 0)
851 dest.s_addr = 0xFFFFFFFF;
853 /* if broadcast, make the ether address a broadcast and don't do ARP */
854 if (dest.s_addr == 0xFFFFFFFF)
855 ether = (uchar *)net_bcast_ethaddr;
857 pkt = (uchar *)net_tx_packet;
859 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
863 net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
865 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
871 /* if MAC address was not discovered yet, do an ARP request */
872 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
873 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
875 /* save the ip and eth addr for the packet to send after arp */
876 net_arp_wait_packet_ip = dest;
877 arp_wait_packet_ethaddr = ether;
879 /* size of the waiting packet */
880 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
882 /* and do the ARP request */
884 arp_wait_timer_start = get_timer(0);
886 return 1; /* waiting */
888 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
890 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
891 return 0; /* transmitted */
895 #ifdef CONFIG_IP_DEFRAG
897 * This function collects fragments in a single packet, according
898 * to the algorithm in RFC815. It returns NULL or the pointer to
899 * a complete packet, in static storage
901 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
903 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
906 * this is the packet being assembled, either data or frag control.
907 * Fragments go by 8 bytes, so this union must be 8 bytes long
910 /* first_byte is address of this structure */
911 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
912 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
913 u16 prev_hole; /* index of prev, 0 == none */
917 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
919 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
920 static u16 first_hole, total_len;
921 struct hole *payload, *thisfrag, *h, *newh;
922 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
923 uchar *indata = (uchar *)ip;
924 int offset8, start, len, done = 0;
925 u16 ip_off = ntohs(ip->ip_off);
928 * Calling code already rejected <, but we don't have to deal
929 * with an IP fragment with no payload.
931 if (ntohs(ip->ip_len) <= IP_HDR_SIZE)
934 /* payload starts after IP header, this fragment is in there */
935 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
936 offset8 = (ip_off & IP_OFFS);
937 thisfrag = payload + offset8;
939 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
941 /* All but last fragment must have a multiple-of-8 payload. */
942 if ((len & 7) && (ip_off & IP_FLAGS_MFRAG))
945 if (start + len > IP_MAXUDP) /* fragment extends too far */
948 if (!total_len || localip->ip_id != ip->ip_id) {
949 /* new (or different) packet, reset structs */
951 payload[0].last_byte = ~0;
952 payload[0].next_hole = 0;
953 payload[0].prev_hole = 0;
955 /* any IP header will work, copy the first we received */
956 memcpy(localip, ip, IP_HDR_SIZE);
960 * What follows is the reassembly algorithm. We use the payload
961 * array as a linked list of hole descriptors, as each hole starts
962 * at a multiple of 8 bytes. However, last byte can be whatever value,
963 * so it is represented as byte count, not as 8-byte blocks.
966 h = payload + first_hole;
967 while (h->last_byte < start) {
969 /* no hole that far away */
972 h = payload + h->next_hole;
975 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
976 if (offset8 + ((len + 7) / 8) <= h - payload) {
977 /* no overlap with holes (dup fragment?) */
981 if (!(ip_off & IP_FLAGS_MFRAG)) {
982 /* no more fragmentss: truncate this (last) hole */
983 total_len = start + len;
984 h->last_byte = start + len;
988 * There is some overlap: fix the hole list. This code doesn't
989 * deal with a fragment that overlaps with two different holes
990 * (thus being a superset of a previously-received fragment).
993 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
994 /* complete overlap with hole: remove hole */
995 if (!h->prev_hole && !h->next_hole) {
996 /* last remaining hole */
998 } else if (!h->prev_hole) {
1000 first_hole = h->next_hole;
1001 payload[h->next_hole].prev_hole = 0;
1002 } else if (!h->next_hole) {
1004 payload[h->prev_hole].next_hole = 0;
1006 /* in the middle of the list */
1007 payload[h->next_hole].prev_hole = h->prev_hole;
1008 payload[h->prev_hole].next_hole = h->next_hole;
1011 } else if (h->last_byte <= start + len) {
1012 /* overlaps with final part of the hole: shorten this hole */
1013 h->last_byte = start;
1015 } else if (h >= thisfrag) {
1016 /* overlaps with initial part of the hole: move this hole */
1017 newh = thisfrag + (len / 8);
1021 payload[h->next_hole].prev_hole = (h - payload);
1023 payload[h->prev_hole].next_hole = (h - payload);
1025 first_hole = (h - payload);
1028 /* fragment sits in the middle: split the hole */
1029 newh = thisfrag + (len / 8);
1031 h->last_byte = start;
1032 h->next_hole = (newh - payload);
1033 newh->prev_hole = (h - payload);
1034 if (newh->next_hole)
1035 payload[newh->next_hole].prev_hole = (newh - payload);
1038 /* finally copy this fragment and possibly return whole packet */
1039 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
1043 *lenp = total_len + IP_HDR_SIZE;
1044 localip->ip_len = htons(*lenp);
1048 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1051 u16 ip_off = ntohs(ip->ip_off);
1052 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1053 return ip; /* not a fragment */
1054 return __net_defragment(ip, lenp);
1057 #else /* !CONFIG_IP_DEFRAG */
1059 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1062 u16 ip_off = ntohs(ip->ip_off);
1063 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1064 return ip; /* not a fragment */
1070 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1073 * @parma ip IP packet containing the ICMP
1075 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1076 struct in_addr src_ip, struct ethernet_hdr *et)
1078 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1080 switch (icmph->type) {
1082 if (icmph->code != ICMP_REDIR_HOST)
1084 printf(" ICMP Host Redirect to %pI4 ",
1085 &icmph->un.gateway);
1088 #if defined(CONFIG_CMD_PING)
1089 ping_receive(et, ip, len);
1091 #ifdef CONFIG_CMD_TFTPPUT
1092 if (packet_icmp_handler)
1093 packet_icmp_handler(icmph->type, icmph->code,
1094 ntohs(ip->udp_dst), src_ip,
1095 ntohs(ip->udp_src), icmph->un.data,
1096 ntohs(ip->udp_len));
1102 void net_process_received_packet(uchar *in_packet, int len)
1104 struct ethernet_hdr *et;
1105 struct ip_udp_hdr *ip;
1106 struct in_addr dst_ip;
1107 struct in_addr src_ip;
1109 #if defined(CONFIG_CMD_CDP)
1112 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1114 debug_cond(DEBUG_NET_PKT, "packet received\n");
1116 #if defined(CONFIG_CMD_PCAP)
1117 pcap_post(in_packet, len, false);
1119 net_rx_packet = in_packet;
1120 net_rx_packet_len = len;
1121 et = (struct ethernet_hdr *)in_packet;
1123 /* too small packet? */
1124 if (len < ETHER_HDR_SIZE)
1127 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1129 (*push_packet)(in_packet, len);
1134 #if defined(CONFIG_CMD_CDP)
1135 /* keep track if packet is CDP */
1136 iscdp = is_cdp_packet(et->et_dest);
1139 myvlanid = ntohs(net_our_vlan);
1140 if (myvlanid == (ushort)-1)
1141 myvlanid = VLAN_NONE;
1142 mynvlanid = ntohs(net_native_vlan);
1143 if (mynvlanid == (ushort)-1)
1144 mynvlanid = VLAN_NONE;
1146 eth_proto = ntohs(et->et_protlen);
1148 if (eth_proto < 1514) {
1149 struct e802_hdr *et802 = (struct e802_hdr *)et;
1151 * Got a 802.2 packet. Check the other protocol field.
1152 * XXX VLAN over 802.2+SNAP not implemented!
1154 eth_proto = ntohs(et802->et_prot);
1156 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1157 len -= E802_HDR_SIZE;
1159 } else if (eth_proto != PROT_VLAN) { /* normal packet */
1160 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1161 len -= ETHER_HDR_SIZE;
1163 } else { /* VLAN packet */
1164 struct vlan_ethernet_hdr *vet =
1165 (struct vlan_ethernet_hdr *)et;
1167 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1169 /* too small packet? */
1170 if (len < VLAN_ETHER_HDR_SIZE)
1173 /* if no VLAN active */
1174 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1175 #if defined(CONFIG_CMD_CDP)
1181 cti = ntohs(vet->vet_tag);
1182 vlanid = cti & VLAN_IDMASK;
1183 eth_proto = ntohs(vet->vet_type);
1185 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1186 len -= VLAN_ETHER_HDR_SIZE;
1189 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1191 #if defined(CONFIG_CMD_CDP)
1193 cdp_receive((uchar *)ip, len);
1198 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1199 if (vlanid == VLAN_NONE)
1200 vlanid = (mynvlanid & VLAN_IDMASK);
1202 if (vlanid != (myvlanid & VLAN_IDMASK))
1206 switch (eth_proto) {
1208 arp_receive(et, ip, len);
1211 #ifdef CONFIG_CMD_RARP
1213 rarp_receive(ip, len);
1217 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1218 /* Before we start poking the header, make sure it is there */
1219 if (len < IP_HDR_SIZE) {
1220 debug("len bad %d < %lu\n", len,
1221 (ulong)IP_HDR_SIZE);
1224 /* Check the packet length */
1225 if (len < ntohs(ip->ip_len)) {
1226 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1229 len = ntohs(ip->ip_len);
1230 if (len < IP_HDR_SIZE) {
1231 debug("bad ip->ip_len %d < %d\n", len, (int)IP_HDR_SIZE);
1234 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1235 len, ip->ip_hl_v & 0xff);
1237 /* Can't deal with anything except IPv4 */
1238 if ((ip->ip_hl_v & 0xf0) != 0x40)
1240 /* Can't deal with IP options (headers != 20 bytes) */
1241 if ((ip->ip_hl_v & 0x0f) != 0x05)
1243 /* Check the Checksum of the header */
1244 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1245 debug("checksum bad\n");
1248 /* If it is not for us, ignore it */
1249 dst_ip = net_read_ip(&ip->ip_dst);
1250 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1251 dst_ip.s_addr != 0xFFFFFFFF) {
1254 /* Read source IP address for later use */
1255 src_ip = net_read_ip(&ip->ip_src);
1257 * The function returns the unchanged packet if it's not
1258 * a fragment, and either the complete packet or NULL if
1259 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1261 ip = net_defragment(ip, &len);
1265 * watch for ICMP host redirects
1267 * There is no real handler code (yet). We just watch
1268 * for ICMP host redirect messages. In case anybody
1269 * sees these messages: please contact me
1270 * (wd@denx.de), or - even better - send me the
1271 * necessary fixes :-)
1273 * Note: in all cases where I have seen this so far
1274 * it was a problem with the router configuration,
1275 * for instance when a router was configured in the
1276 * BOOTP reply, but the TFTP server was on the same
1277 * subnet. So this is probably a warning that your
1278 * configuration might be wrong. But I'm not really
1279 * sure if there aren't any other situations.
1281 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1282 * we send a tftp packet to a dead connection, or when
1283 * there is no server at the other end.
1285 if (ip->ip_p == IPPROTO_ICMP) {
1286 receive_icmp(ip, len, src_ip, et);
1288 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1292 if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > len - IP_HDR_SIZE)
1295 debug_cond(DEBUG_DEV_PKT,
1296 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1297 &dst_ip, &src_ip, len);
1299 if (IS_ENABLED(CONFIG_UDP_CHECKSUM) && ip->udp_xsum != 0) {
1305 xsum += (ntohs(ip->udp_len));
1306 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1307 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1308 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1309 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
1311 sumlen = ntohs(ip->udp_len);
1312 sumptr = (u8 *)&ip->udp_src;
1314 while (sumlen > 1) {
1315 /* inlined ntohs() to avoid alignment errors */
1316 xsum += (sumptr[0] << 8) + sumptr[1];
1321 xsum += (sumptr[0] << 8) + sumptr[0];
1322 while ((xsum >> 16) != 0) {
1323 xsum = (xsum & 0x0000ffff) +
1324 ((xsum >> 16) & 0x0000ffff);
1326 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1327 printf(" UDP wrong checksum %08lx %08x\n",
1328 xsum, ntohs(ip->udp_xsum));
1333 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
1334 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1338 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1341 * IP header OK. Pass the packet to the current handler.
1343 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1347 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1349 #ifdef CONFIG_CMD_WOL
1351 wol_receive(ip, len);
1354 #ifdef CONFIG_PHY_NCSI
1356 ncsi_receive(et, ip, len);
1362 /**********************************************************************/
1364 static int net_check_prereq(enum proto_t protocol)
1368 #if defined(CONFIG_CMD_PING)
1370 if (net_ping_ip.s_addr == 0) {
1371 puts("*** ERROR: ping address not given\n");
1376 #if defined(CONFIG_CMD_DNS)
1378 if (net_dns_server.s_addr == 0) {
1379 puts("*** ERROR: DNS server address not given\n");
1384 #if defined(CONFIG_PROT_UDP)
1391 #if defined(CONFIG_CMD_NFS)
1397 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
1398 puts("*** ERROR: `serverip' not set\n");
1401 #if defined(CONFIG_CMD_PING) || \
1402 defined(CONFIG_CMD_DNS) || defined(CONFIG_PROT_UDP)
1410 if (net_ip.s_addr == 0) {
1411 puts("*** ERROR: `ipaddr' not set\n");
1416 #ifdef CONFIG_CMD_RARP
1419 #ifdef CONFIG_PHY_NCSI
1426 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1427 int num = eth_get_dev_index();
1431 puts("*** ERROR: No ethernet found.\n");
1434 puts("*** ERROR: `ethaddr' not set\n");
1437 printf("*** ERROR: `eth%daddr' not set\n",
1451 /**********************************************************************/
1454 net_eth_hdr_size(void)
1458 myvlanid = ntohs(net_our_vlan);
1459 if (myvlanid == (ushort)-1)
1460 myvlanid = VLAN_NONE;
1462 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1463 VLAN_ETHER_HDR_SIZE;
1466 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1468 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1471 myvlanid = ntohs(net_our_vlan);
1472 if (myvlanid == (ushort)-1)
1473 myvlanid = VLAN_NONE;
1475 memcpy(et->et_dest, dest_ethaddr, 6);
1476 memcpy(et->et_src, net_ethaddr, 6);
1477 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1478 et->et_protlen = htons(prot);
1479 return ETHER_HDR_SIZE;
1481 struct vlan_ethernet_hdr *vet =
1482 (struct vlan_ethernet_hdr *)xet;
1484 vet->vet_vlan_type = htons(PROT_VLAN);
1485 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1486 vet->vet_type = htons(prot);
1487 return VLAN_ETHER_HDR_SIZE;
1491 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1495 memcpy(et->et_dest, addr, 6);
1496 memcpy(et->et_src, net_ethaddr, 6);
1497 protlen = ntohs(et->et_protlen);
1498 if (protlen == PROT_VLAN) {
1499 struct vlan_ethernet_hdr *vet =
1500 (struct vlan_ethernet_hdr *)et;
1501 vet->vet_type = htons(prot);
1502 return VLAN_ETHER_HDR_SIZE;
1503 } else if (protlen > 1514) {
1504 et->et_protlen = htons(prot);
1505 return ETHER_HDR_SIZE;
1508 struct e802_hdr *et802 = (struct e802_hdr *)et;
1509 et802->et_prot = htons(prot);
1510 return E802_HDR_SIZE;
1514 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
1515 u16 pkt_len, u8 proto)
1517 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1520 * Construct an IP header.
1522 /* IP_HDR_SIZE / 4 (not including UDP) */
1525 ip->ip_len = htons(pkt_len);
1527 ip->ip_id = htons(net_ip_id++);
1528 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1531 /* already in network byte order */
1532 net_copy_ip((void *)&ip->ip_src, &source);
1533 /* already in network byte order */
1534 net_copy_ip((void *)&ip->ip_dst, &dest);
1536 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
1539 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1542 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1545 * If the data is an odd number of bytes, zero the
1546 * byte after the last byte so that the checksum
1550 pkt[IP_UDP_HDR_SIZE + len] = 0;
1552 net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
1555 ip->udp_src = htons(sport);
1556 ip->udp_dst = htons(dport);
1557 ip->udp_len = htons(UDP_HDR_SIZE + len);
1561 void copy_filename(char *dst, const char *src, int size)
1563 if (src && *src && (*src == '"')) {
1568 while ((--size > 0) && src && *src && (*src != '"'))
1573 int is_serverip_in_cmd(void)
1575 return !!strchr(net_boot_file_name, ':');
1578 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
1584 if (net_boot_file_name[0] == '\0')
1587 colon = strchr(net_boot_file_name, ':');
1589 ip = string_to_ip(net_boot_file_name);
1590 if (ipaddr && ip.s_addr)
1594 strncpy(filename, colon + 1, max_len);
1596 strncpy(filename, net_boot_file_name, max_len);
1598 filename[max_len - 1] = '\0';
1603 void ip_to_string(struct in_addr x, char *s)
1605 x.s_addr = ntohl(x.s_addr);
1606 sprintf(s, "%d.%d.%d.%d",
1607 (int) ((x.s_addr >> 24) & 0xff),
1608 (int) ((x.s_addr >> 16) & 0xff),
1609 (int) ((x.s_addr >> 8) & 0xff),
1610 (int) ((x.s_addr >> 0) & 0xff)
1614 void vlan_to_string(ushort x, char *s)
1618 if (x == (ushort)-1)
1624 sprintf(s, "%d", x & VLAN_IDMASK);
1627 ushort string_to_vlan(const char *s)
1632 return htons(VLAN_NONE);
1634 if (*s < '0' || *s > '9')
1637 id = (ushort)dectoul(s, NULL);
1642 ushort env_get_vlan(char *var)
1644 return string_to_vlan(env_get(var));