/*
* Copied from Linux Monitor (LiMon) - Networking.
*
* Copyright 1994 - 2000 Neil Russell.
* (See License)
* Copyright 2000 Roland Borde
* Copyright 2000 Paolo Scaffardi
* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
*/
/*
* General Desription:
*
* The user interface supports commands for BOOTP, RARP, and TFTP.
* Also, we support ARP internally. Depending on available data,
* these interact as follows:
*
* BOOTP:
*
* Prerequisites: - own ethernet address
* We want: - own IP address
* - TFTP server IP address
* - name of bootfile
* Next step: ARP
*
* RARP:
*
* Prerequisites: - own ethernet address
* We want: - own IP address
* - TFTP server IP address
* Next step: ARP
*
* ARP:
*
* Prerequisites: - own ethernet address
* - own IP address
* - TFTP server IP address
* We want: - TFTP server ethernet address
* Next step: TFTP
*
* DHCP:
*
* Prerequisites: - own ethernet address
* We want: - IP, Netmask, ServerIP, Gateway IP
* - bootfilename, lease time
* Next step: - TFTP
*
* TFTP:
*
* Prerequisites: - own ethernet address
* - own IP address
* - TFTP server IP address
* - TFTP server ethernet address
* - name of bootfile (if unknown, we use a default name
* derived from our own IP address)
* We want: - load the boot file
* Next step: none
*
* NFS:
*
* Prerequisites: - own ethernet address
* - own IP address
* - name of bootfile (if unknown, we use a default name
* derived from our own IP address)
* We want: - load the boot file
* Next step: none
*
*/
#include <common.h>
#include <clock.h>
#include <watchdog.h>
#include <command.h>
#include <environment.h>
#include <param.h>
#include <net.h>
#include <driver.h>
#include <errno.h>
#include <linux/ctype.h>
#include "tftp.h"
#include "rarp.h"
#include "nfs.h"
#define ARP_TIMEOUT (5 * SECOND) /* Seconds before trying ARP again */
#ifndef CONFIG_NET_RETRY_COUNT
# define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
#else
# define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
#endif
/** BOOTP EXTENTIONS **/
IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
#ifdef CONFIG_BOOTP_DNS2
IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
#endif
char NetOurNISDomain[32]={0,}; /* Our NIS domain */
char NetOurHostName[32]={0,}; /* Our hostname */
char NetOurRootPath[64]={0,}; /* Our bootpath */
/** END OF BOOTP EXTENTIONS **/
ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
uchar NetOurEther[6]; /* Our ethernet address */
uchar NetServerEther[6] = /* Boot server enet address */
{ 0, 0, 0, 0, 0, 0 };
IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */
uchar *NetRxPkt; /* Current receive packet */
int NetRxPktLen; /* Current rx packet length */
unsigned NetIPID; /* IP packet ID */
uchar NetBcastAddr[6] = /* Ethernet bcast address */
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
uchar NetEtherNullAddr[6] =
{ 0, 0, 0, 0, 0, 0 };
int NetState; /* Network loop state */
/* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
char BootFile[128]; /* Boot File name */
uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
static rxhand_f *packetHandler; /* Current RX packet handler */
static thand_f *timeHandler; /* Current timeout handler */
static uint64_t timeStart; /* Time base value */
static uint64_t timeDelta; /* Current timeout value */
uchar *NetTxPacket = 0; /* THE transmit packet */
static int net_check_prereq (proto_t protocol);
/**********************************************************************/
IPaddr_t NetArpWaitPacketIP;
IPaddr_t NetArpWaitReplyIP;
uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
uchar *NetArpWaitTxPacket; /* THE transmit packet */
int NetArpWaitTxPacketSize;
uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
uint64_t NetArpWaitTimerStart;
void ArpRequest (void)
{
int i;
uchar *pkt;
ARP_t *arp;
#ifdef ET_DEBUG
printf ("ARP broadcast\n");
#endif
pkt = NetTxPacket;
pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
arp = (ARP_t *) pkt;
arp->ar_hrd = htons (ARP_ETHER);
arp->ar_pro = htons (PROT_IP);
arp->ar_hln = 6;
arp->ar_pln = 4;
arp->ar_op = htons (ARPOP_REQUEST);
memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
for (i = 10; i < 16; ++i) {
arp->ar_data[i] = 0; /* dest ET addr = 0 */
}
if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
(NetOurIP & NetOurSubnetMask)) {
if (NetOurGatewayIP == 0) {
puts ("## Warning: gatewayip needed but not set\n");
NetArpWaitReplyIP = NetArpWaitPacketIP;
} else {
NetArpWaitReplyIP = NetOurGatewayIP;
}
} else {
NetArpWaitReplyIP = NetArpWaitPacketIP;
}
NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
(void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
}
static void ArpTimeoutCheck(void)
{
if (!NetArpWaitPacketIP)
return;
/* check for arp timeout */
if (is_timeout(NetArpWaitTimerStart, ARP_TIMEOUT)) {
NetArpWaitTimerStart = get_time_ns();
ArpRequest();
}
}
/**********************************************************************/
/*
* Main network processing loop.
*/
int NetLoopInit(proto_t protocol)
{
struct eth_device *eth_current = eth_get_current();
IPaddr_t ip;
int ret;
int i;
if (!eth_current) {
printf("Current ethernet device not set!\n");
return -1;
}
ip = dev_get_param_ip(ð_current->dev, "ipaddr");
NetCopyIP(&NetOurIP, &ip);
/* XXX problem with bss workaround */
NetArpWaitPacketMAC = NULL;
NetArpWaitTxPacket = NULL;
NetArpWaitPacketIP = 0;
NetArpWaitReplyIP = 0;
/*
* Setup packet buffers, aligned correctly.
*/
NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
for (i = 0; i < PKTBUFSRX; i++) {
NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
}
NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
NetArpWaitTxPacketSize = 0;
if (eth_open() < 0)
return -1;
string_to_ethaddr(dev_get_param(ð_get_current()->dev, "ethaddr"),
NetOurEther);
NetState = NETLOOP_CONTINUE;
NetOurGatewayIP = dev_get_param_ip(ð_current->dev, "gateway");
NetOurSubnetMask = dev_get_param_ip(ð_current->dev, "netmask");
NetOurVLAN = getenv_VLAN("vlan");
NetOurNativeVLAN = getenv_VLAN("nvlan");
NetServerIP = dev_get_param_ip(ð_current->dev, "serverip");
ret = net_check_prereq(protocol);
if (ret)
eth_halt();
return ret;
}
int NetLoop(void)
{
/*
* Start the ball rolling with the given start function. From
* here on, this code is a state machine driven by received
* packets and timer events.
*/
NetBootFileXferSize = 0;
/*
* Main packet reception loop. Loop receiving packets until
* someone sets `NetState' to a state that terminates.
*/
for (;;) {
WATCHDOG_RESET();
#ifdef CONFIG_SHOW_ACTIVITY
{
extern void show_activity(int arg);
show_activity(1);
}
#endif
/*
* Check the ethernet for a new packet. The ethernet
* receive routine will process it.
*/
eth_rx();
/*
* Abort if ctrl-c was pressed.
*/
if (ctrlc()) {
eth_halt();
puts ("\nAbort\n");
return -1;
}
ArpTimeoutCheck();
/*
* Check for a timeout, and run the timeout handler
* if we have one.
*/
if (timeHandler && is_timeout(timeStart, timeDelta)) {
thand_f *x;
x = timeHandler;
timeHandler = (thand_f *)0;
(*x)();
}
switch (NetState) {
case NETLOOP_SUCCESS:
if (NetBootFileXferSize > 0) {
char buf[10];
printf("Bytes transferred = %ld (%lx hex)\n",
NetBootFileXferSize,
NetBootFileXferSize);
sprintf(buf, "0x%lx", NetBootFileXferSize);
setenv("filesize", buf);
}
eth_halt();
return NetBootFileXferSize;
case NETLOOP_FAIL:
eth_halt();
return -1;
}
}
}
/**********************************************************************/
/*
* Miscelaneous bits.
*/
void
NetSetHandler(rxhand_f * f)
{
packetHandler = f;
}
void
NetSetTimeout(uint64_t iv, thand_f * f)
{
if (iv == 0) {
timeHandler = (thand_f *)0;
} else {
timeHandler = f;
timeStart = get_time_ns();
timeDelta = iv;
}
}
void
NetSendPacket(uchar * pkt, int len)
{
(void) eth_send(pkt, len);
}
int
NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
{
uchar *pkt;
/* convert to new style broadcast */
if (dest == 0)
dest = 0xFFFFFFFF;
/* if broadcast, make the ether address a broadcast and don't do ARP */
if (dest == 0xFFFFFFFF)
ether = NetBcastAddr;
/* if MAC address was not discovered yet, save the packet and do an ARP request */
if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
#ifdef ET_DEBUG
printf("sending ARP for %08lx\n", dest);
#endif
NetArpWaitPacketIP = dest;
NetArpWaitPacketMAC = ether;
pkt = NetArpWaitTxPacket;
pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
NetSetIP (pkt, dest, dport, sport, len);
memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
/* size of the waiting packet */
NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
/* and do the ARP request */
NetArpWaitTimerStart = get_time_ns();
ArpRequest();
return 1; /* waiting */
}
#ifdef ET_DEBUG
printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
#endif
pkt = (uchar *)NetTxPacket;
pkt += NetSetEther (pkt, ether, PROT_IP);
NetSetIP (pkt, dest, dport, sport, len);
(void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
return 0; /* transmitted */
}
void
NetReceive(uchar * inpkt, int len)
{
Ethernet_t *et;
IP_t *ip;
ARP_t *arp;
IPaddr_t tmp;
int x;
uchar *pkt;
ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
#ifdef ET_DEBUG
printf("packet received\n");
#endif
NetRxPkt = inpkt;
NetRxPktLen = len;
et = (Ethernet_t *)inpkt;
/* too small packet? */
if (len < ETHER_HDR_SIZE)
return;
myvlanid = ntohs(NetOurVLAN);
if (myvlanid == (ushort)-1)
myvlanid = VLAN_NONE;
mynvlanid = ntohs(NetOurNativeVLAN);
if (mynvlanid == (ushort)-1)
mynvlanid = VLAN_NONE;
x = ntohs(et->et_protlen);
#ifdef ET_DEBUG
printf("packet received\n");
#endif
if (x < 1514) {
/*
* Got a 802 packet. Check the other protocol field.
*/
x = ntohs(et->et_prot);
ip = (IP_t *)(inpkt + E802_HDR_SIZE);
len -= E802_HDR_SIZE;
} else if (x != PROT_VLAN) { /* normal packet */
ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
len -= ETHER_HDR_SIZE;
} else { /* VLAN packet */
VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
#ifdef ET_DEBUG
printf("VLAN packet received\n");
#endif
/* too small packet? */
if (len < VLAN_ETHER_HDR_SIZE)
return;
/* if no VLAN active */
if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
)
return;
cti = ntohs(vet->vet_tag);
vlanid = cti & VLAN_IDMASK;
x = ntohs(vet->vet_type);
ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
len -= VLAN_ETHER_HDR_SIZE;
}
#ifdef ET_DEBUG
printf("Receive from protocol 0x%x\n", x);
#endif
if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
if (vlanid == VLAN_NONE)
vlanid = (mynvlanid & VLAN_IDMASK);
/* not matched? */
if (vlanid != (myvlanid & VLAN_IDMASK))
return;
}
switch (x) {
case PROT_ARP:
/*
* We have to deal with two types of ARP packets:
* - REQUEST packets will be answered by sending our
* IP address - if we know it.
* - REPLY packets are expected only after we asked
* for the TFTP server's or the gateway's ethernet
* address; so if we receive such a packet, we set
* the server ethernet address
*/
#ifdef ET_DEBUG
puts ("Got ARP\n");
#endif
arp = (ARP_t *)ip;
if (len < ARP_HDR_SIZE) {
printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
return;
}
if (ntohs(arp->ar_hrd) != ARP_ETHER) {
return;
}
if (ntohs(arp->ar_pro) != PROT_IP) {
return;
}
if (arp->ar_hln != 6) {
return;
}
if (arp->ar_pln != 4) {
return;
}
if (NetOurIP == 0) {
return;
}
if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
return;
}
switch (ntohs(arp->ar_op)) {
case ARPOP_REQUEST: /* reply with our IP address */
#ifdef ET_DEBUG
puts ("Got ARP REQUEST, return our IP\n");
#endif
pkt = (uchar *)et;
pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
arp->ar_op = htons(ARPOP_REPLY);
memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
memcpy (&arp->ar_data[ 0], NetOurEther, 6);
NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
memcpy(NetTxPacket, et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
eth_send((uchar *)NetTxPacket, (pkt - (uchar *)et) + ARP_HDR_SIZE);
return;
case ARPOP_REPLY: /* arp reply */
/* are we waiting for a reply */
if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
break;
#ifdef ET_DEBUG
printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
arp->ar_data[0], arp->ar_data[1],
arp->ar_data[2], arp->ar_data[3],
arp->ar_data[4], arp->ar_data[5]);
#endif
tmp = NetReadIP(&arp->ar_data[6]);
/* matched waiting packet's address */
if (tmp == NetArpWaitReplyIP) {
#ifdef ET_DEBUG
puts ("Got it\n");
#endif
/* save address for later use */
memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
#ifdef CONFIG_NETCONSOLE
(*packetHandler)(0,0,0,0);
#endif
/* modify header, and transmit it */
memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
(void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
/* no arp request pending now */
NetArpWaitPacketIP = 0;
NetArpWaitTxPacketSize = 0;
NetArpWaitPacketMAC = NULL;
}
return;
default:
#ifdef ET_DEBUG
printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
#endif
return;
}
break;
case PROT_RARP:
#ifdef ET_DEBUG
puts ("Got RARP\n");
#endif
arp = (ARP_t *)ip;
if (len < ARP_HDR_SIZE) {
printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
return;
}
if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
(ntohs(arp->ar_hrd) != ARP_ETHER) ||
(ntohs(arp->ar_pro) != PROT_IP) ||
(arp->ar_hln != 6) || (arp->ar_pln != 4)) {
puts ("invalid RARP header\n");
} else {
NetCopyIP(&NetOurIP, &arp->ar_data[16]);
if (NetServerIP == 0)
NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
memcpy (NetServerEther, &arp->ar_data[ 0], 6);
(*packetHandler)(0,0,0,0);
}
break;
case PROT_IP:
#ifdef ET_DEBUG
puts ("Got IP\n");
#endif
if (len < IP_HDR_SIZE) {
debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
return;
}
if (len < ntohs(ip->ip_len)) {
printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
return;
}
len = ntohs(ip->ip_len);
#ifdef ET_DEBUG
printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
#endif
if ((ip->ip_hl_v & 0xf0) != 0x40) {
return;
}
if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
return;
}
if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
puts ("checksum bad\n");
return;
}
tmp = NetReadIP(&ip->ip_dst);
if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
return;
}
/*
* watch for ICMP host redirects
*
* There is no real handler code (yet). We just watch
* for ICMP host redirect messages. In case anybody
* sees these messages: please contact me
* (wd@denx.de), or - even better - send me the
* necessary fixes :-)
*
* Note: in all cases where I have seen this so far
* it was a problem with the router configuration,
* for instance when a router was configured in the
* BOOTP reply, but the TFTP server was on the same
* subnet. So this is probably a warning that your
* configuration might be wrong. But I'm not really
* sure if there aren't any other situations.
*/
if (ip->ip_p == IPPROTO_ICMP) {
ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
switch (icmph->type) {
case ICMP_REDIRECT:
if (icmph->code != ICMP_REDIR_HOST)
return;
puts (" ICMP Host Redirect to ");
print_IPaddr(icmph->un.gateway);
putchar(' ');
return;
#ifdef CONFIG_NET_PING
case ICMP_ECHO_REPLY:
/*
* IP header OK. Pass the packet to the current handler.
*/
/* XXX point to ip packet */
(*packetHandler)((uchar *)ip, 0, 0, 0);
return;
#endif
default:
return;
}
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
return;
}
#ifdef CONFIG_UDP_CHECKSUM
if (ip->udp_xsum != 0) {
ulong xsum;
ushort *sumptr;
ushort sumlen;
xsum = ip->ip_p;
xsum += (ntohs(ip->udp_len));
xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
sumlen = ntohs(ip->udp_len);
sumptr = (ushort *) &(ip->udp_src);
while (sumlen > 1) {
ushort sumdata;
sumdata = *sumptr++;
xsum += ntohs(sumdata);
sumlen -= 2;
}
if (sumlen > 0) {
ushort sumdata;
sumdata = *(unsigned char *) sumptr;
sumdata = (sumdata << 8) & 0xff00;
xsum += sumdata;
}
while ((xsum >> 16) != 0) {
xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
}
if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
return;
}
}
#endif
#ifdef CONFIG_NETCONSOLE
nc_input_packet((uchar *)ip +IP_HDR_SIZE,
ntohs(ip->udp_dst),
ntohs(ip->udp_src),
ntohs(ip->udp_len) - 8);
#endif
/*
* IP header OK. Pass the packet to the current handler.
*/
(*packetHandler)((uchar *)ip +IP_HDR_SIZE,
ntohs(ip->udp_dst),
ntohs(ip->udp_src),
ntohs(ip->udp_len) - 8);
break;
}
}
/**********************************************************************/
static int net_check_prereq (proto_t protocol)
{
struct eth_device *edev = eth_get_current();
switch (protocol) {
/* Fall through */
#ifdef CONFIG_NET_NFS
case NFS:
#endif
case NETCONS:
case TFTP:
if (NetServerIP == 0) {
printf("*** ERROR: `%s.serverip' not set\n", dev_id(&edev->dev));
return -1;
}
if (NetOurIP == 0) {
printf("*** ERROR: `%s.ipaddr' not set\n", dev_id(&edev->dev));
return -1;
}
/* Fall through */
case DHCP:
case RARP:
case BOOTP:
if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
printf("*** ERROR: `%s.ethaddr' not set\n", dev_id(&edev->dev));
return -1;
}
/* Fall through */
default:
return 0;
}
return -1; /* not reached */
}
/**********************************************************************/
int
NetCksumOk(uchar * ptr, int len)
{
return !((NetCksum(ptr, len) + 1) & 0xfffe);
}
unsigned
NetCksum(uchar * ptr, int len)
{
ulong xsum;
ushort *p = (ushort *)ptr;
xsum = 0;
while (len-- > 0)
xsum += *p++;
xsum = (xsum & 0xffff) + (xsum >> 16);
xsum = (xsum & 0xffff) + (xsum >> 16);
return xsum & 0xffff;
}
int
NetEthHdrSize(void)
{
ushort myvlanid;
myvlanid = ntohs(NetOurVLAN);
if (myvlanid == (ushort)-1)
myvlanid = VLAN_NONE;
return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
}
int
NetSetEther(uchar * xet, uchar * addr, uint prot)
{
Ethernet_t *et = (Ethernet_t *)xet;
ushort myvlanid;
myvlanid = ntohs(NetOurVLAN);
if (myvlanid == (ushort)-1)
myvlanid = VLAN_NONE;
memcpy (et->et_dest, addr, 6);
memcpy (et->et_src, NetOurEther, 6);
if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
et->et_protlen = htons(prot);
return ETHER_HDR_SIZE;
} else {
VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
vet->vet_vlan_type = htons(PROT_VLAN);
vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
vet->vet_type = htons(prot);
return VLAN_ETHER_HDR_SIZE;
}
}
void
NetSetIP(uchar * xip, IPaddr_t dest, int dport, int sport, int len)
{
IP_t *ip = (IP_t *)xip;
/*
* If the data is an odd number of bytes, zero the
* byte after the last byte so that the checksum
* will work.
*/
if (len & 1)
xip[IP_HDR_SIZE + len] = 0;
/*
* Construct an IP and UDP header.
* (need to set no fragment bit - XXX)
*/
ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
ip->ip_tos = 0;
ip->ip_len = htons(IP_HDR_SIZE + len);
ip->ip_id = htons(NetIPID++);
ip->ip_off = htons(0x4000); /* No fragmentation */
ip->ip_ttl = 255;
ip->ip_p = 17; /* UDP */
ip->ip_sum = 0;
NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
ip->udp_src = htons(sport);
ip->udp_dst = htons(dport);
ip->udp_len = htons(8 + len);
ip->udp_xsum = 0;
ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
}
char *ip_to_string (IPaddr_t x, char *s)
{
x = ntohl (x);
sprintf (s, "%d.%d.%d.%d",
(int) ((x >> 24) & 0xff),
(int) ((x >> 16) & 0xff),
(int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
);
return s;
}
int string_to_ip(const char *s, IPaddr_t *ip)
{
IPaddr_t addr = 0;
char *e;
int i;
if (!s)
return -EINVAL;
for (i = 0; i < 4; i++) {
ulong val;
if (!isdigit(*s))
return -EINVAL;
val = simple_strtoul(s, &e, 10);
addr <<= 8;
addr |= (val & 0xFF);
if (*e != '.' && i != 3)
return -EINVAL;
s = e + 1;
}
*ip = htonl(addr);
return 0;
}
void VLAN_to_string(ushort x, char *s)
{
x = ntohs(x);
if (x == (ushort)-1)
x = VLAN_NONE;
if (x == VLAN_NONE)
strcpy(s, "none");
else
sprintf(s, "%d", x & VLAN_IDMASK);
}
ushort string_to_VLAN(const char *s)
{
ushort id;
if (s == NULL)
return htons(VLAN_NONE);
if (*s < '0' || *s > '9')
id = VLAN_NONE;
else
id = (ushort)simple_strtoul(s, NULL, 10);
return htons(id);
}
void print_IPaddr (IPaddr_t x)
{
char tmp[16];
ip_to_string (x, tmp);
puts (tmp);
}
ushort getenv_VLAN(char *var)
{
return string_to_VLAN(getenv(var));
}
int string_to_ethaddr(const char *str, char *enetaddr)
{
ulong reg;
char *e;
if (!str || strlen(str) != 17)
return -1;
if (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
str[11] != ':' || str[14] != ':')
return -1;
for (reg = 0; reg < 6; ++reg) {
enetaddr[reg] = simple_strtoul (str, &e, 16);
str = e + 1;
}
return 0;
}
void ethaddr_to_string(const unsigned char *enetaddr, char *str)
{
sprintf (str, "%02X:%02X:%02X:%02X:%02X:%02X",
enetaddr[0], enetaddr[1], enetaddr[2], enetaddr[3],
enetaddr[4], enetaddr[5]);
}
