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
14 * The user interface supports commands for BOOTP, RARP, and TFTP.
15 * Also, we support ARP internally. Depending on available data,
16 * these interact as follows:
20 * Prerequisites: - own ethernet address
21 * We want: - own IP address
22 * - TFTP server IP address
28 * Prerequisites: - own ethernet address
29 * We want: - own IP address
30 * - TFTP server IP address
35 * Prerequisites: - own ethernet address
37 * - TFTP server IP address
38 * We want: - TFTP server ethernet address
43 * Prerequisites: - own ethernet address
44 * We want: - IP, Netmask, ServerIP, Gateway IP
45 * - bootfilename, lease time
50 * Prerequisites: - own ethernet address
52 * - TFTP server IP address
53 * - TFTP server ethernet address
54 * - name of bootfile (if unknown, we use a default name
55 * derived from our own IP address)
56 * We want: - load the boot file
61 * Prerequisites: - own ethernet address
63 * - name of bootfile (if unknown, we use a default name
64 * derived from our own IP address)
65 * We want: - load the boot file
70 * Prerequisites: - own ethernet address
72 * We want: - network time
80 #if defined(CONFIG_STATUS_LED)
82 #include <status_led.h>
85 #include <linux/compiler.h>
89 #if defined(CONFIG_CMD_DNS)
95 #if defined(CONFIG_CMD_SNTP)
100 DECLARE_GLOBAL_DATA_PTR;
102 /** BOOTP EXTENTIONS **/
104 /* Our subnet mask (0=unknown) */
105 IPaddr_t NetOurSubnetMask;
106 /* Our gateways IP address */
107 IPaddr_t NetOurGatewayIP;
108 /* Our DNS IP address */
109 IPaddr_t NetOurDNSIP;
110 #if defined(CONFIG_BOOTP_DNS2)
111 /* Our 2nd DNS IP address */
112 IPaddr_t NetOurDNS2IP;
115 char NetOurNISDomain[32] = {0,};
117 char NetOurHostName[32] = {0,};
119 char NetOurRootPath[64] = {0,};
120 /* Our bootfile size in blocks */
121 ushort NetBootFileSize;
123 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
127 /** END OF BOOTP EXTENTIONS **/
129 /* The actual transferred size of the bootfile (in bytes) */
130 ulong NetBootFileXferSize;
131 /* Our ethernet address */
132 uchar NetOurEther[6];
133 /* Boot server enet address */
134 uchar NetServerEther[6];
135 /* Our IP addr (0 = unknown) */
137 /* Server IP addr (0 = unknown) */
138 IPaddr_t NetServerIP;
139 /* Current receive packet */
141 /* Current rx packet length */
145 /* Ethernet bcast address */
146 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
147 uchar NetEtherNullAddr[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 */
155 /* Network loop restarted */
156 static int NetRestarted;
157 /* At least one device configured */
158 static int NetDevExists;
160 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
161 /* default is without VLAN */
162 ushort NetOurVLAN = 0xFFFF;
164 ushort NetOurNativeVLAN = 0xFFFF;
169 #if defined(CONFIG_CMD_SNTP)
170 /* NTP server IP address */
171 IPaddr_t NetNtpServerIP;
172 /* offset time from UTC */
176 uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
179 uchar *NetRxPackets[PKTBUFSRX];
181 /* Current UDP RX packet handler */
182 static rxhand_f *udp_packet_handler;
183 /* Current ARP RX packet handler */
184 static rxhand_f *arp_packet_handler;
185 #ifdef CONFIG_CMD_TFTPPUT
186 /* Current ICMP rx handler */
187 static rxhand_icmp_f *packet_icmp_handler;
189 /* Current timeout handler */
190 static thand_f *timeHandler;
191 /* Time base value */
192 static ulong timeStart;
193 /* Current timeout value */
194 static ulong timeDelta;
195 /* THE transmit packet */
198 static int net_check_prereq(enum proto_t protocol);
200 static int NetTryCount;
202 /**********************************************************************/
205 * Check if autoload is enabled. If so, use either NFS or TFTP to download
208 void net_auto_load(void)
210 const char *s = getenv("autoload");
215 * Just use BOOTP/RARP to configure system;
216 * Do not use TFTP to load the bootfile.
218 net_set_state(NETLOOP_SUCCESS);
221 #if defined(CONFIG_CMD_NFS)
222 if (strcmp(s, "NFS") == 0) {
224 * Use NFS to load the bootfile.
234 static void NetInitLoop(enum proto_t protocol)
236 static int env_changed_id;
237 int env_id = get_env_id();
239 /* update only when the environment has changed */
240 if (env_changed_id != env_id) {
241 NetOurIP = getenv_IPaddr("ipaddr");
242 NetOurGatewayIP = getenv_IPaddr("gatewayip");
243 NetOurSubnetMask = getenv_IPaddr("netmask");
244 NetServerIP = getenv_IPaddr("serverip");
245 NetOurNativeVLAN = getenv_VLAN("nvlan");
246 NetOurVLAN = getenv_VLAN("vlan");
247 #if defined(CONFIG_CMD_DNS)
248 NetOurDNSIP = getenv_IPaddr("dnsip");
250 env_changed_id = env_id;
256 static void net_clear_handlers(void)
258 net_set_udp_handler(NULL);
259 net_set_arp_handler(NULL);
260 NetSetTimeout(0, NULL);
263 static void net_cleanup_loop(void)
265 net_clear_handlers();
268 /**********************************************************************/
270 * Main network processing loop.
273 int NetLoop(enum proto_t protocol)
286 net_clear_handlers();
289 * Setup packet buffers, aligned correctly.
291 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
292 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
293 for (i = 0; i < PKTBUFSRX; i++)
294 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
296 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
299 if (eth_init(bd) < 0) {
305 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
307 net_set_state(NETLOOP_CONTINUE);
310 * Start the ball rolling with the given start function. From
311 * here on, this code is a state machine driven by received
312 * packets and timer events.
314 NetInitLoop(protocol);
316 switch (net_check_prereq(protocol)) {
318 /* network not configured */
323 /* network device not configured */
328 NetBootFileXferSize = 0;
331 #ifdef CONFIG_CMD_TFTPPUT
334 /* always use ARP to get server ethernet address */
337 #ifdef CONFIG_CMD_TFTPSRV
342 #if defined(CONFIG_CMD_DHCP)
346 DhcpRequest(); /* Basically same as BOOTP */
356 #if defined(CONFIG_CMD_RARP)
363 #if defined(CONFIG_CMD_PING)
368 #if defined(CONFIG_CMD_NFS)
373 #if defined(CONFIG_CMD_CDP)
378 #ifdef CONFIG_NETCONSOLE
383 #if defined(CONFIG_CMD_SNTP)
388 #if defined(CONFIG_CMD_DNS)
400 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
401 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
402 defined(CONFIG_STATUS_LED) && \
403 defined(STATUS_LED_RED)
405 * Echo the inverted link state to the fault LED.
407 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
408 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
410 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
411 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
412 #endif /* CONFIG_MII, ... */
415 * Main packet reception loop. Loop receiving packets until
416 * someone sets `net_state' to a state that terminates.
420 #ifdef CONFIG_SHOW_ACTIVITY
424 * Check the ethernet for a new packet. The ethernet
425 * receive routine will process it.
430 * Abort if ctrl-c was pressed.
442 * Check for a timeout, and run the timeout handler
445 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
448 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
449 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
450 defined(CONFIG_STATUS_LED) && \
451 defined(STATUS_LED_RED)
453 * Echo the inverted link state to the fault LED.
455 if (miiphy_link(eth_get_dev()->name,
456 CONFIG_SYS_FAULT_MII_ADDR)) {
457 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
459 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
462 #endif /* CONFIG_MII, ... */
464 timeHandler = (thand_f *)0;
471 case NETLOOP_RESTART:
475 case NETLOOP_SUCCESS:
477 if (NetBootFileXferSize > 0) {
479 printf("Bytes transferred = %ld (%lx hex)\n",
481 NetBootFileXferSize);
482 sprintf(buf, "%lX", NetBootFileXferSize);
483 setenv("filesize", buf);
485 sprintf(buf, "%lX", (unsigned long)load_addr);
486 setenv("fileaddr", buf);
489 ret = NetBootFileXferSize;
496 case NETLOOP_CONTINUE:
502 #ifdef CONFIG_CMD_TFTPPUT
503 /* Clear out the handlers */
504 net_set_udp_handler(NULL);
505 net_set_icmp_handler(NULL);
510 /**********************************************************************/
513 startAgainTimeout(void)
515 net_set_state(NETLOOP_RESTART);
518 void NetStartAgain(void)
521 int retry_forever = 0;
522 unsigned long retrycnt = 0;
524 nretry = getenv("netretry");
526 if (!strcmp(nretry, "yes"))
528 else if (!strcmp(nretry, "no"))
530 else if (!strcmp(nretry, "once"))
533 retrycnt = simple_strtoul(nretry, NULL, 0);
537 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
539 net_set_state(NETLOOP_FAIL);
546 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
547 eth_try_another(!NetRestarted);
550 if (NetRestartWrap) {
553 NetSetTimeout(10000UL, startAgainTimeout);
554 net_set_udp_handler(NULL);
556 net_set_state(NETLOOP_FAIL);
559 net_set_state(NETLOOP_RESTART);
563 /**********************************************************************/
568 static void dummy_handler(uchar *pkt, unsigned dport,
569 IPaddr_t sip, unsigned sport,
574 rxhand_f *net_get_udp_handler(void)
576 return udp_packet_handler;
579 void net_set_udp_handler(rxhand_f *f)
582 udp_packet_handler = dummy_handler;
584 udp_packet_handler = f;
587 rxhand_f *net_get_arp_handler(void)
589 return arp_packet_handler;
592 void net_set_arp_handler(rxhand_f *f)
595 arp_packet_handler = dummy_handler;
597 arp_packet_handler = f;
600 #ifdef CONFIG_CMD_TFTPPUT
601 void net_set_icmp_handler(rxhand_icmp_f *f)
603 packet_icmp_handler = f;
608 NetSetTimeout(ulong iv, thand_f *f)
611 timeHandler = (thand_f *)0;
614 timeStart = get_timer(0);
619 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
627 /* convert to new style broadcast */
631 /* if broadcast, make the ether address a broadcast and don't do ARP */
632 if (dest == 0xFFFFFFFF)
633 ether = NetBcastAddr;
636 * if MAC address was not discovered yet, save the packet and do
639 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
641 pkt = NetArpWaitTxPacket;
643 pkt = (uchar *)NetTxPacket;
645 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
647 net_set_udp_header(pkt, dest, dport, sport, payload_len);
648 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
651 debug("sending ARP for %pI4\n", &dest);
653 /* save the ip and eth addr for the packet to send after arp */
654 NetArpWaitPacketIP = dest;
655 NetArpWaitPacketMAC = ether;
658 * Copy the packet data from the NetTxPacket into the
659 * NetArpWaitTxPacket to send after arp
661 memcpy(pkt + IP_UDP_HDR_SIZE, (uchar *)NetTxPacket +
662 pkt_hdr_size, payload_len);
664 /* size of the waiting packet */
665 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
667 /* and do the ARP request */
669 NetArpWaitTimerStart = get_timer(0);
671 return 1; /* waiting */
673 debug("sending UDP to %pI4/%pM\n", &dest, ether);
674 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
675 return 0; /* transmitted */
679 #ifdef CONFIG_IP_DEFRAG
681 * This function collects fragments in a single packet, according
682 * to the algorithm in RFC815. It returns NULL or the pointer to
683 * a complete packet, in static storage
685 #ifndef CONFIG_NET_MAXDEFRAG
686 #define CONFIG_NET_MAXDEFRAG 16384
689 * MAXDEFRAG, above, is chosen in the config file and is real data
690 * so we need to add the NFS overhead, which is more than TFTP.
691 * To use sizeof in the internal unnamed structures, we need a real
692 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
693 * The compiler doesn't complain nor allocates the actual structure
695 static struct rpc_t rpc_specimen;
696 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
698 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
701 * this is the packet being assembled, either data or frag control.
702 * Fragments go by 8 bytes, so this union must be 8 bytes long
705 /* first_byte is address of this structure */
706 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
707 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
708 u16 prev_hole; /* index of prev, 0 == none */
712 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
714 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
715 static u16 first_hole, total_len;
716 struct hole *payload, *thisfrag, *h, *newh;
717 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
718 uchar *indata = (uchar *)ip;
719 int offset8, start, len, done = 0;
720 u16 ip_off = ntohs(ip->ip_off);
722 /* payload starts after IP header, this fragment is in there */
723 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
724 offset8 = (ip_off & IP_OFFS);
725 thisfrag = payload + offset8;
727 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
729 if (start + len > IP_MAXUDP) /* fragment extends too far */
732 if (!total_len || localip->ip_id != ip->ip_id) {
733 /* new (or different) packet, reset structs */
735 payload[0].last_byte = ~0;
736 payload[0].next_hole = 0;
737 payload[0].prev_hole = 0;
739 /* any IP header will work, copy the first we received */
740 memcpy(localip, ip, IP_HDR_SIZE);
744 * What follows is the reassembly algorithm. We use the payload
745 * array as a linked list of hole descriptors, as each hole starts
746 * at a multiple of 8 bytes. However, last byte can be whatever value,
747 * so it is represented as byte count, not as 8-byte blocks.
750 h = payload + first_hole;
751 while (h->last_byte < start) {
753 /* no hole that far away */
756 h = payload + h->next_hole;
759 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
760 if (offset8 + ((len + 7) / 8) <= h - payload) {
761 /* no overlap with holes (dup fragment?) */
765 if (!(ip_off & IP_FLAGS_MFRAG)) {
766 /* no more fragmentss: truncate this (last) hole */
767 total_len = start + len;
768 h->last_byte = start + len;
772 * There is some overlap: fix the hole list. This code doesn't
773 * deal with a fragment that overlaps with two different holes
774 * (thus being a superset of a previously-received fragment).
777 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
778 /* complete overlap with hole: remove hole */
779 if (!h->prev_hole && !h->next_hole) {
780 /* last remaining hole */
782 } else if (!h->prev_hole) {
784 first_hole = h->next_hole;
785 payload[h->next_hole].prev_hole = 0;
786 } else if (!h->next_hole) {
788 payload[h->prev_hole].next_hole = 0;
790 /* in the middle of the list */
791 payload[h->next_hole].prev_hole = h->prev_hole;
792 payload[h->prev_hole].next_hole = h->next_hole;
795 } else if (h->last_byte <= start + len) {
796 /* overlaps with final part of the hole: shorten this hole */
797 h->last_byte = start;
799 } else if (h >= thisfrag) {
800 /* overlaps with initial part of the hole: move this hole */
801 newh = thisfrag + (len / 8);
805 payload[h->next_hole].prev_hole = (h - payload);
807 payload[h->prev_hole].next_hole = (h - payload);
809 first_hole = (h - payload);
812 /* fragment sits in the middle: split the hole */
813 newh = thisfrag + (len / 8);
815 h->last_byte = start;
816 h->next_hole = (newh - payload);
817 newh->prev_hole = (h - payload);
819 payload[newh->next_hole].prev_hole = (newh - payload);
822 /* finally copy this fragment and possibly return whole packet */
823 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
827 localip->ip_len = htons(total_len);
828 *lenp = total_len + IP_HDR_SIZE;
832 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
834 u16 ip_off = ntohs(ip->ip_off);
835 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
836 return ip; /* not a fragment */
837 return __NetDefragment(ip, lenp);
840 #else /* !CONFIG_IP_DEFRAG */
842 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp)
844 u16 ip_off = ntohs(ip->ip_off);
845 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
846 return ip; /* not a fragment */
852 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
855 * @parma ip IP packet containing the ICMP
857 static void receive_icmp(struct ip_udp_hdr *ip, int len,
858 IPaddr_t src_ip, struct ethernet_hdr *et)
860 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
862 switch (icmph->type) {
864 if (icmph->code != ICMP_REDIR_HOST)
866 printf(" ICMP Host Redirect to %pI4 ",
870 #if defined(CONFIG_CMD_PING)
871 ping_receive(et, ip, len);
873 #ifdef CONFIG_CMD_TFTPPUT
874 if (packet_icmp_handler)
875 packet_icmp_handler(icmph->type, icmph->code,
876 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src),
877 icmph->un.data, ntohs(ip->udp_len));
884 NetReceive(uchar *inpkt, int len)
886 struct ethernet_hdr *et;
887 struct ip_udp_hdr *ip;
891 #if defined(CONFIG_CMD_CDP)
894 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
896 debug("packet received\n");
899 NetRxPacketLen = len;
900 et = (struct ethernet_hdr *)inpkt;
902 /* too small packet? */
903 if (len < ETHER_HDR_SIZE)
908 (*push_packet)(inpkt, len);
913 #if defined(CONFIG_CMD_CDP)
914 /* keep track if packet is CDP */
915 iscdp = is_cdp_packet(et->et_dest);
918 myvlanid = ntohs(NetOurVLAN);
919 if (myvlanid == (ushort)-1)
920 myvlanid = VLAN_NONE;
921 mynvlanid = ntohs(NetOurNativeVLAN);
922 if (mynvlanid == (ushort)-1)
923 mynvlanid = VLAN_NONE;
925 eth_proto = ntohs(et->et_protlen);
927 debug("packet received\n");
929 if (eth_proto < 1514) {
930 struct e802_hdr *et802 = (struct e802_hdr *)et;
932 * Got a 802.2 packet. Check the other protocol field.
933 * XXX VLAN over 802.2+SNAP not implemented!
935 eth_proto = ntohs(et802->et_prot);
937 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE);
938 len -= E802_HDR_SIZE;
940 } else if (eth_proto != PROT_VLAN) { /* normal packet */
941 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE);
942 len -= ETHER_HDR_SIZE;
944 } else { /* VLAN packet */
945 struct vlan_ethernet_hdr *vet =
946 (struct vlan_ethernet_hdr *)et;
948 debug("VLAN packet received\n");
950 /* too small packet? */
951 if (len < VLAN_ETHER_HDR_SIZE)
954 /* if no VLAN active */
955 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
956 #if defined(CONFIG_CMD_CDP)
962 cti = ntohs(vet->vet_tag);
963 vlanid = cti & VLAN_IDMASK;
964 eth_proto = ntohs(vet->vet_type);
966 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE);
967 len -= VLAN_ETHER_HDR_SIZE;
970 debug("Receive from protocol 0x%x\n", eth_proto);
972 #if defined(CONFIG_CMD_CDP)
974 cdp_receive((uchar *)ip, len);
979 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
980 if (vlanid == VLAN_NONE)
981 vlanid = (mynvlanid & VLAN_IDMASK);
983 if (vlanid != (myvlanid & VLAN_IDMASK))
990 ArpReceive(et, ip, len);
993 #ifdef CONFIG_CMD_RARP
995 rarp_receive(ip, len);
1000 /* Before we start poking the header, make sure it is there */
1001 if (len < IP_UDP_HDR_SIZE) {
1002 debug("len bad %d < %lu\n", len,
1003 (ulong)IP_UDP_HDR_SIZE);
1006 /* Check the packet length */
1007 if (len < ntohs(ip->ip_len)) {
1008 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1011 len = ntohs(ip->ip_len);
1012 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1014 /* Can't deal with anything except IPv4 */
1015 if ((ip->ip_hl_v & 0xf0) != 0x40)
1017 /* Can't deal with IP options (headers != 20 bytes) */
1018 if ((ip->ip_hl_v & 0x0f) > 0x05)
1020 /* Check the Checksum of the header */
1021 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
1022 puts("checksum bad\n");
1025 /* If it is not for us, ignore it */
1026 dst_ip = NetReadIP(&ip->ip_dst);
1027 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) {
1028 #ifdef CONFIG_MCAST_TFTP
1029 if (Mcast_addr != dst_ip)
1033 /* Read source IP address for later use */
1034 src_ip = NetReadIP(&ip->ip_src);
1036 * The function returns the unchanged packet if it's not
1037 * a fragment, and either the complete packet or NULL if
1038 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1040 ip = NetDefragment(ip, &len);
1044 * watch for ICMP host redirects
1046 * There is no real handler code (yet). We just watch
1047 * for ICMP host redirect messages. In case anybody
1048 * sees these messages: please contact me
1049 * (wd@denx.de), or - even better - send me the
1050 * necessary fixes :-)
1052 * Note: in all cases where I have seen this so far
1053 * it was a problem with the router configuration,
1054 * for instance when a router was configured in the
1055 * BOOTP reply, but the TFTP server was on the same
1056 * subnet. So this is probably a warning that your
1057 * configuration might be wrong. But I'm not really
1058 * sure if there aren't any other situations.
1060 * Simon Glass <sjg@chromium.org>: We get an ICMP when
1061 * we send a tftp packet to a dead connection, or when
1062 * there is no server at the other end.
1064 if (ip->ip_p == IPPROTO_ICMP) {
1065 receive_icmp(ip, len, src_ip, et);
1067 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1071 #ifdef CONFIG_UDP_CHECKSUM
1072 if (ip->udp_xsum != 0) {
1078 xsum += (ntohs(ip->udp_len));
1079 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1080 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1081 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1082 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1084 sumlen = ntohs(ip->udp_len);
1085 sumptr = (ushort *) &(ip->udp_src);
1087 while (sumlen > 1) {
1090 sumdata = *sumptr++;
1091 xsum += ntohs(sumdata);
1097 sumdata = *(unsigned char *) sumptr;
1098 sumdata = (sumdata << 8) & 0xff00;
1101 while ((xsum >> 16) != 0) {
1102 xsum = (xsum & 0x0000ffff) +
1103 ((xsum >> 16) & 0x0000ffff);
1105 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1106 printf(" UDP wrong checksum %08lx %08x\n",
1107 xsum, ntohs(ip->udp_xsum));
1114 #ifdef CONFIG_NETCONSOLE
1115 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1118 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1121 * IP header OK. Pass the packet to the current handler.
1123 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1127 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1133 /**********************************************************************/
1135 static int net_check_prereq(enum proto_t protocol)
1139 #if defined(CONFIG_CMD_PING)
1141 if (NetPingIP == 0) {
1142 puts("*** ERROR: ping address not given\n");
1147 #if defined(CONFIG_CMD_SNTP)
1149 if (NetNtpServerIP == 0) {
1150 puts("*** ERROR: NTP server address not given\n");
1155 #if defined(CONFIG_CMD_DNS)
1157 if (NetOurDNSIP == 0) {
1158 puts("*** ERROR: DNS server address not given\n");
1163 #if defined(CONFIG_CMD_NFS)
1168 if (NetServerIP == 0) {
1169 puts("*** ERROR: `serverip' not set\n");
1172 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1173 defined(CONFIG_CMD_DNS)
1180 if (NetOurIP == 0) {
1181 puts("*** ERROR: `ipaddr' not set\n");
1186 #ifdef CONFIG_CMD_RARP
1192 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1193 int num = eth_get_dev_index();
1197 puts("*** ERROR: No ethernet found.\n");
1200 puts("*** ERROR: `ethaddr' not set\n");
1203 printf("*** ERROR: `eth%daddr' not set\n",
1217 /**********************************************************************/
1220 NetCksumOk(uchar *ptr, int len)
1222 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1227 NetCksum(uchar *ptr, int len)
1230 ushort *p = (ushort *)ptr;
1235 xsum = (xsum & 0xffff) + (xsum >> 16);
1236 xsum = (xsum & 0xffff) + (xsum >> 16);
1237 return xsum & 0xffff;
1245 myvlanid = ntohs(NetOurVLAN);
1246 if (myvlanid == (ushort)-1)
1247 myvlanid = VLAN_NONE;
1249 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1250 VLAN_ETHER_HDR_SIZE;
1254 NetSetEther(uchar *xet, uchar * addr, uint prot)
1256 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1259 myvlanid = ntohs(NetOurVLAN);
1260 if (myvlanid == (ushort)-1)
1261 myvlanid = VLAN_NONE;
1263 memcpy(et->et_dest, addr, 6);
1264 memcpy(et->et_src, NetOurEther, 6);
1265 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1266 et->et_protlen = htons(prot);
1267 return ETHER_HDR_SIZE;
1269 struct vlan_ethernet_hdr *vet =
1270 (struct vlan_ethernet_hdr *)xet;
1272 vet->vet_vlan_type = htons(PROT_VLAN);
1273 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1274 vet->vet_type = htons(prot);
1275 return VLAN_ETHER_HDR_SIZE;
1279 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source)
1281 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1284 * Construct an IP header.
1286 /* IP_HDR_SIZE / 4 (not including UDP) */
1289 ip->ip_len = htons(IP_HDR_SIZE);
1290 ip->ip_id = htons(NetIPID++);
1291 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1294 /* already in network byte order */
1295 NetCopyIP((void *)&ip->ip_src, &source);
1296 /* already in network byte order */
1297 NetCopyIP((void *)&ip->ip_dst, &dest);
1300 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport,
1303 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1306 * If the data is an odd number of bytes, zero the
1307 * byte after the last byte so that the checksum
1311 pkt[IP_UDP_HDR_SIZE + len] = 0;
1313 net_set_ip_header(pkt, dest, NetOurIP);
1314 ip->ip_len = htons(IP_UDP_HDR_SIZE + len);
1315 ip->ip_p = IPPROTO_UDP;
1316 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1);
1318 ip->udp_src = htons(sport);
1319 ip->udp_dst = htons(dport);
1320 ip->udp_len = htons(UDP_HDR_SIZE + len);
1324 void copy_filename(char *dst, const char *src, int size)
1326 if (*src && (*src == '"')) {
1331 while ((--size > 0) && *src && (*src != '"'))
1336 #if defined(CONFIG_CMD_NFS) || \
1337 defined(CONFIG_CMD_SNTP) || \
1338 defined(CONFIG_CMD_DNS)
1340 * make port a little random (1024-17407)
1341 * This keeps the math somewhat trivial to compute, and seems to work with
1342 * all supported protocols/clients/servers
1344 unsigned int random_port(void)
1346 return 1024 + (get_timer(0) % 0x4000);
1350 void ip_to_string(IPaddr_t x, char *s)
1353 sprintf(s, "%d.%d.%d.%d",
1354 (int) ((x >> 24) & 0xff),
1355 (int) ((x >> 16) & 0xff),
1356 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1360 void VLAN_to_string(ushort x, char *s)
1364 if (x == (ushort)-1)
1370 sprintf(s, "%d", x & VLAN_IDMASK);
1373 ushort string_to_VLAN(const char *s)
1378 return htons(VLAN_NONE);
1380 if (*s < '0' || *s > '9')
1383 id = (ushort)simple_strtoul(s, NULL, 10);
1388 ushort getenv_VLAN(char *var)
1390 return string_to_VLAN(getenv(var));