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u-boot/net/net.c
wdenk 59acc296d9 Minor cleanup
2005-04-03 14:18:51 +00:00

1706 lines
37 KiB
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/*
* 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
*
* SNTP:
*
* Prerequisites: - own ethernet address
* - own IP address
* We want: - network time
* Next step: none
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <net.h>
#include "bootp.h"
#include "tftp.h"
#include "rarp.h"
#include "nfs.h"
#ifdef CONFIG_STATUS_LED
#include <status_led.h>
#include <miiphy.h>
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
#include "sntp.h"
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NET)
#define ARP_TIMEOUT 5 /* 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
#if 0
#define ET_DEBUG
#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 */
#if (CONFIG_BOOTP_MASK & 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 */
ushort NetBootFileSize=0; /* Our bootfile size in blocks */
/** 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) */
volatile 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 };
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
uchar NetCDPAddr[6] = /* Ethernet bcast address */
{ 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
#endif
int NetState; /* Network loop state */
#ifdef CONFIG_NET_MULTI
int NetRestartWrap = 0; /* Tried all network devices */
static int NetRestarted = 0; /* Network loop restarted */
static int NetDevExists = 0; /* At least one device configured */
#endif
/* 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 */
#if (CONFIG_COMMANDS & CFG_CMD_PING)
IPaddr_t NetPingIP; /* the ip address to ping */
static void PingStart(void);
#endif
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
static void CDPStart(void);
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
IPaddr_t NetNtpServerIP; /* NTP server IP address */
int NetTimeOffset=0; /* offset time from UTC */
#endif
#ifdef CONFIG_NETCONSOLE
void NcStart(void);
int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
#endif
volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
static rxhand_f *packetHandler; /* Current RX packet handler */
static thand_f *timeHandler; /* Current timeout handler */
static ulong timeStart; /* Time base value */
static ulong timeDelta; /* Current timeout value */
volatile 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];
ulong NetArpWaitTimerStart;
int NetArpWaitTry;
void ArpRequest (void)
{
int i;
volatile uchar *pkt;
ARP_t *arp;
#ifdef ET_DEBUG
printf ("ARP broadcast %d\n", NetArpWaitTry);
#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 = NetOurGatewayIP;
} else {
NetArpWaitReplyIP = NetArpWaitPacketIP;
}
NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
(void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
}
void ArpTimeoutCheck(void)
{
ulong t;
if (!NetArpWaitPacketIP)
return;
t = get_timer(0);
/* check for arp timeout */
if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) {
NetArpWaitTry++;
if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
puts ("\nARP Retry count exceeded; starting again\n");
NetArpWaitTry = 0;
NetStartAgain();
} else {
NetArpWaitTimerStart = t;
ArpRequest();
}
}
}
/**********************************************************************/
/*
* Main network processing loop.
*/
int
NetLoop(proto_t protocol)
{
DECLARE_GLOBAL_DATA_PTR;
bd_t *bd = gd->bd;
#ifdef CONFIG_NET_MULTI
NetRestarted = 0;
NetDevExists = 0;
#endif
/* XXX problem with bss workaround */
NetArpWaitPacketMAC = NULL;
NetArpWaitTxPacket = NULL;
NetArpWaitPacketIP = 0;
NetArpWaitReplyIP = 0;
NetArpWaitTxPacket = NULL;
NetTxPacket = NULL;
if (!NetTxPacket) {
int i;
/*
* 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;
}
}
if (!NetArpWaitTxPacket) {
NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
NetArpWaitTxPacketSize = 0;
}
eth_halt();
#ifdef CONFIG_NET_MULTI
eth_set_current();
#endif
if (eth_init(bd) < 0)
return(-1);
restart:
#ifdef CONFIG_NET_MULTI
memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
#else
memcpy (NetOurEther, bd->bi_enetaddr, 6);
#endif
NetState = NETLOOP_CONTINUE;
/*
* 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.
*/
switch (protocol) {
#if (CONFIG_COMMANDS & CFG_CMD_NFS)
case NFS:
#endif
#if (CONFIG_COMMANDS & CFG_CMD_PING)
case PING:
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
case SNTP:
#endif
case NETCONS:
case TFTP:
NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
NetOurGatewayIP = getenv_IPaddr ("gatewayip");
NetOurSubnetMask= getenv_IPaddr ("netmask");
NetOurVLAN = getenv_VLAN("vlan");
NetOurNativeVLAN = getenv_VLAN("nvlan");
switch (protocol) {
#if (CONFIG_COMMANDS & CFG_CMD_NFS)
case NFS:
#endif
case NETCONS:
case TFTP:
NetServerIP = getenv_IPaddr ("serverip");
break;
#if (CONFIG_COMMANDS & CFG_CMD_PING)
case PING:
/* nothing */
break;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
case SNTP:
/* nothing */
break;
#endif
default:
break;
}
break;
case BOOTP:
case RARP:
/*
* initialize our IP addr to 0 in order to accept ANY
* IP addr assigned to us by the BOOTP / RARP server
*/
NetOurIP = 0;
NetServerIP = getenv_IPaddr ("serverip");
NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
NetOurNativeVLAN = getenv_VLAN("nvlan");
case CDP:
NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
NetOurNativeVLAN = getenv_VLAN("nvlan");
break;
default:
break;
}
switch (net_check_prereq (protocol)) {
case 1:
/* network not configured */
return (-1);
#ifdef CONFIG_NET_MULTI
case 2:
/* network device not configured */
break;
#endif /* CONFIG_NET_MULTI */
case 0:
#ifdef CONFIG_NET_MULTI
NetDevExists = 1;
#endif
switch (protocol) {
case TFTP:
/* always use ARP to get server ethernet address */
TftpStart();
break;
#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
case DHCP:
/* Start with a clean slate... */
BootpTry = 0;
NetOurIP = 0;
NetServerIP = getenv_IPaddr ("serverip");
DhcpRequest(); /* Basically same as BOOTP */
break;
#endif /* CFG_CMD_DHCP */
case BOOTP:
BootpTry = 0;
BootpRequest ();
break;
case RARP:
RarpTry = 0;
RarpRequest ();
break;
#if (CONFIG_COMMANDS & CFG_CMD_PING)
case PING:
PingStart();
break;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NFS)
case NFS:
NfsStart();
break;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
case CDP:
CDPStart();
break;
#endif
#ifdef CONFIG_NETCONSOLE
case NETCONS:
NcStart();
break;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
case SNTP:
SntpStart();
break;
#endif
default:
break;
}
NetBootFileXferSize = 0;
break;
}
#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
#if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
/*
* Echo the inverted link state to the fault LED.
*/
if(miiphy_link(CFG_FAULT_MII_ADDR)) {
status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
} else {
status_led_set (STATUS_LED_RED, STATUS_LED_ON);
}
#endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
#endif /* CONFIG_MII, ... */
/*
* 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 && ((get_timer(0) - timeStart) > timeDelta)) {
thand_f *x;
#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
# if defined(CFG_FAULT_ECHO_LINK_DOWN) &&
defined(CONFIG_STATUS_LED) &&
defined(STATUS_LED_RED)
/*
* Echo the inverted link state to the fault LED.
*/
if(miiphy_link(CFG_FAULT_MII_ADDR)) {
status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
} else {
status_led_set (STATUS_LED_RED, STATUS_LED_ON);
}
# endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
#endif /* CONFIG_MII, ... */
x = timeHandler;
timeHandler = (thand_f *)0;
(*x)();
}
switch (NetState) {
case NETLOOP_RESTART:
#ifdef CONFIG_NET_MULTI
NetRestarted = 1;
#endif
goto restart;
case NETLOOP_SUCCESS:
if (NetBootFileXferSize > 0) {
char buf[10];
printf("Bytes transferred = %ld (%lx hex)\n",
NetBootFileXferSize,
NetBootFileXferSize);
sprintf(buf, "%lx", NetBootFileXferSize);
setenv("filesize", buf);
sprintf(buf, "%lX", (unsigned long)load_addr);
setenv("fileaddr", buf);
}
eth_halt();
return NetBootFileXferSize;
case NETLOOP_FAIL:
return (-1);
}
}
}
/**********************************************************************/
static void
startAgainTimeout(void)
{
NetState = NETLOOP_RESTART;
}
static void
startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
/* Totally ignore the packet */
}
void NetStartAgain (void)
{
#ifdef CONFIG_NET_MULTI
DECLARE_GLOBAL_DATA_PTR;
#endif
char *nretry;
int noretry = 0, once = 0;
if ((nretry = getenv ("netretry")) != NULL) {
noretry = (strcmp (nretry, "no") == 0);
once = (strcmp (nretry, "once") == 0);
}
if (noretry) {
eth_halt ();
NetState = NETLOOP_FAIL;
return;
}
#ifndef CONFIG_NET_MULTI
NetSetTimeout (10 * CFG_HZ, startAgainTimeout);
NetSetHandler (startAgainHandler);
#else /* !CONFIG_NET_MULTI*/
eth_halt ();
eth_try_another (!NetRestarted);
eth_init (gd->bd);
if (NetRestartWrap) {
NetRestartWrap = 0;
if (NetDevExists && !once) {
NetSetTimeout (10 * CFG_HZ, startAgainTimeout);
NetSetHandler (startAgainHandler);
} else {
NetState = NETLOOP_FAIL;
}
} else {
NetState = NETLOOP_RESTART;
}
#endif /* CONFIG_NET_MULTI */
}
/**********************************************************************/
/*
* Miscelaneous bits.
*/
void
NetSetHandler(rxhand_f * f)
{
packetHandler = f;
}
void
NetSetTimeout(ulong iv, thand_f * f)
{
if (iv == 0) {
timeHandler = (thand_f *)0;
} else {
timeHandler = f;
timeStart = get_timer(0);
timeDelta = iv;
}
}
void
NetSendPacket(volatile 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 */
NetArpWaitTry = 1;
NetArpWaitTimerStart = get_timer(0);
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 */
}
#if (CONFIG_COMMANDS & CFG_CMD_PING)
static ushort PingSeqNo;
int PingSend(void)
{
static uchar mac[6];
volatile IP_t *ip;
volatile ushort *s;
uchar *pkt;
/* XXX always send arp request */
memcpy(mac, NetEtherNullAddr, 6);
#ifdef ET_DEBUG
printf("sending ARP for %08lx\n", NetPingIP);
#endif
NetArpWaitPacketIP = NetPingIP;
NetArpWaitPacketMAC = mac;
pkt = NetArpWaitTxPacket;
pkt += NetSetEther(pkt, mac, PROT_IP);
ip = (volatile IP_t *)pkt;
/*
* Construct an IP and ICMP 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_NO_UDP + 8);
ip->ip_id = htons(NetIPID++);
ip->ip_off = htons(0x4000); /* No fragmentation */
ip->ip_ttl = 255;
ip->ip_p = 0x01; /* ICMP */
ip->ip_sum = 0;
NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
s = &ip->udp_src; /* XXX ICMP starts here */
s[0] = htons(0x0800); /* echo-request, code */
s[1] = 0; /* checksum */
s[2] = 0; /* identifier */
s[3] = htons(PingSeqNo++); /* sequence number */
s[1] = ~NetCksum((uchar *)s, 8/2);
/* size of the waiting packet */
NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
/* and do the ARP request */
NetArpWaitTry = 1;
NetArpWaitTimerStart = get_timer(0);
ArpRequest();
return 1; /* waiting */
}
static void
PingTimeout (void)
{
eth_halt();
NetState = NETLOOP_FAIL; /* we did not get the reply */
}
static void
PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
IPaddr_t tmp;
volatile IP_t *ip = (volatile IP_t *)pkt;
tmp = NetReadIP((void *)&ip->ip_src);
if (tmp != NetPingIP)
return;
NetState = NETLOOP_SUCCESS;
}
static void PingStart(void)
{
#if defined(CONFIG_NET_MULTI)
printf ("Using %s device\n", eth_get_name());
#endif /* CONFIG_NET_MULTI */
NetSetTimeout (10 * CFG_HZ, PingTimeout);
NetSetHandler (PingHandler);
PingSend();
}
#endif /* CFG_CMD_PING */
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
#define CDP_DEVICE_ID_TLV 0x0001
#define CDP_ADDRESS_TLV 0x0002
#define CDP_PORT_ID_TLV 0x0003
#define CDP_CAPABILITIES_TLV 0x0004
#define CDP_VERSION_TLV 0x0005
#define CDP_PLATFORM_TLV 0x0006
#define CDP_NATIVE_VLAN_TLV 0x000a
#define CDP_APPLIANCE_VLAN_TLV 0x000e
#define CDP_TRIGGER_TLV 0x000f
#define CDP_POWER_CONSUMPTION_TLV 0x0010
#define CDP_SYSNAME_TLV 0x0014
#define CDP_SYSOBJECT_TLV 0x0015
#define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
#define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */
static int CDPSeq;
static int CDPOK;
ushort CDPNativeVLAN;
ushort CDPApplianceVLAN;
static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
static ushort CDP_compute_csum(const uchar *buff, ushort len)
{
ushort csum;
int odd;
ulong result = 0;
ushort leftover;
if (len > 0) {
odd = 1 & (ulong)buff;
if (odd) {
result = *buff << 8;
len--;
buff++;
}
while (len > 1) {
result += *((const ushort *)buff)++;
if (result & 0x80000000)
result = (result & 0xFFFF) + (result >> 16);
len -= 2;
}
if (len) {
leftover = (signed short)(*(const signed char *)buff);
/* * XXX CISCO SUCKS big time! (and blows too) */
result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
}
while (result >> 16)
result = (result & 0xFFFF) + (result >> 16);
if (odd)
result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
}
/* add up 16-bit and 17-bit words for 17+c bits */
result = (result & 0xffff) + (result >> 16);
/* add up 16-bit and 2-bit for 16+c bit */
result = (result & 0xffff) + (result >> 16);
/* add up carry.. */
result = (result & 0xffff) + (result >> 16);
/* negate */
csum = ~(ushort)result;
/* run time endian detection */
if (csum != htons(csum)) /* little endian */
csum = htons(csum);
return csum;
}
int CDPSendTrigger(void)
{
volatile uchar *pkt;
volatile ushort *s;
volatile ushort *cp;
Ethernet_t *et;
int len;
ushort chksum;
#if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
char buf[32];
#endif
pkt = NetTxPacket;
et = (Ethernet_t *)pkt;
/* NOTE: trigger sent not on any VLAN */
/* form ethernet header */
memcpy(et->et_dest, NetCDPAddr, 6);
memcpy(et->et_src, NetOurEther, 6);
pkt += ETHER_HDR_SIZE;
/* SNAP header */
memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
pkt += sizeof(CDP_SNAP_hdr);
/* CDP header */
*pkt++ = 0x02; /* CDP version 2 */
*pkt++ = 180; /* TTL */
s = (volatile ushort *)pkt;
cp = s;
*s++ = htons(0); /* checksum (0 for later calculation) */
/* CDP fields */
#ifdef CONFIG_CDP_DEVICE_ID
*s++ = htons(CDP_DEVICE_ID_TLV);
*s++ = htons(CONFIG_CDP_DEVICE_ID);
memset(buf, 0, sizeof(buf));
sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
memcpy((uchar *)s, buf, 16);
s += 16 / 2;
#endif
#ifdef CONFIG_CDP_PORT_ID
*s++ = htons(CDP_PORT_ID_TLV);
memset(buf, 0, sizeof(buf));
sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
len = strlen(buf);
if (len & 1) /* make it even */
len++;
*s++ = htons(len + 4);
memcpy((uchar *)s, buf, len);
s += len / 2;
#endif
#ifdef CONFIG_CDP_CAPABILITIES
*s++ = htons(CDP_CAPABILITIES_TLV);
*s++ = htons(8);
*(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
s += 2;
#endif
#ifdef CONFIG_CDP_VERSION
*s++ = htons(CDP_VERSION_TLV);
memset(buf, 0, sizeof(buf));
strcpy(buf, CONFIG_CDP_VERSION);
len = strlen(buf);
if (len & 1) /* make it even */
len++;
*s++ = htons(len + 4);
memcpy((uchar *)s, buf, len);
s += len / 2;
#endif
#ifdef CONFIG_CDP_PLATFORM
*s++ = htons(CDP_PLATFORM_TLV);
memset(buf, 0, sizeof(buf));
strcpy(buf, CONFIG_CDP_PLATFORM);
len = strlen(buf);
if (len & 1) /* make it even */
len++;
*s++ = htons(len + 4);
memcpy((uchar *)s, buf, len);
s += len / 2;
#endif
#ifdef CONFIG_CDP_TRIGGER
*s++ = htons(CDP_TRIGGER_TLV);
*s++ = htons(8);
*(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
s += 2;
#endif
#ifdef CONFIG_CDP_POWER_CONSUMPTION
*s++ = htons(CDP_POWER_CONSUMPTION_TLV);
*s++ = htons(6);
*s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
#endif
/* length of ethernet packet */
len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
et->et_protlen = htons(len);
len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
if (chksum == 0)
chksum = 0xFFFF;
*cp = htons(chksum);
(void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
return 0;
}
static void
CDPTimeout (void)
{
CDPSeq++;
if (CDPSeq < 3) {
NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
CDPSendTrigger();
return;
}
/* if not OK try again */
if (!CDPOK)
NetStartAgain();
else
NetState = NETLOOP_SUCCESS;
}
static void
CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
/* nothing */
}
static void
CDPHandler(const uchar * pkt, unsigned len)
{
const uchar *t;
const ushort *ss;
ushort type, tlen;
uchar applid;
ushort vlan, nvlan;
/* minimum size? */
if (len < sizeof(CDP_SNAP_hdr) + 4)
goto pkt_short;
/* check for valid CDP SNAP header */
if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
return;
pkt += sizeof(CDP_SNAP_hdr);
len -= sizeof(CDP_SNAP_hdr);
/* Version of CDP protocol must be >= 2 and TTL != 0 */
if (pkt[0] < 0x02 || pkt[1] == 0)
return;
/* if version is greater than 0x02 maybe we'll have a problem; output a warning */
if (pkt[0] != 0x02)
printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
pkt[0] & 0xff);
if (CDP_compute_csum(pkt, len) != 0)
return;
pkt += 4;
len -= 4;
vlan = htons(-1);
nvlan = htons(-1);
while (len > 0) {
if (len < 4)
goto pkt_short;
ss = (const ushort *)pkt;
type = ntohs(ss[0]);
tlen = ntohs(ss[1]);
if (tlen > len) {
goto pkt_short;
}
pkt += tlen;
len -= tlen;
ss += 2; /* point ss to the data of the TLV */
tlen -= 4;
switch (type) {
case CDP_DEVICE_ID_TLV:
break;
case CDP_ADDRESS_TLV:
break;
case CDP_PORT_ID_TLV:
break;
case CDP_CAPABILITIES_TLV:
break;
case CDP_VERSION_TLV:
break;
case CDP_PLATFORM_TLV:
break;
case CDP_NATIVE_VLAN_TLV:
nvlan = *ss;
break;
case CDP_APPLIANCE_VLAN_TLV:
t = (const uchar *)ss;
while (tlen > 0) {
if (tlen < 3)
goto pkt_short;
applid = t[0];
ss = (const ushort *)(t + 1);
#ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
vlan = *ss;
#else
vlan = ntohs(*ss); /* XXX will this work; dunno */
#endif
t += 3; tlen -= 3;
}
break;
case CDP_TRIGGER_TLV:
break;
case CDP_POWER_CONSUMPTION_TLV:
break;
case CDP_SYSNAME_TLV:
break;
case CDP_SYSOBJECT_TLV:
break;
case CDP_MANAGEMENT_ADDRESS_TLV:
break;
}
}
CDPApplianceVLAN = vlan;
CDPNativeVLAN = nvlan;
CDPOK = 1;
return;
pkt_short:
printf("** CDP packet is too short\n");
return;
}
static void CDPStart(void)
{
#if defined(CONFIG_NET_MULTI)
printf ("Using %s device\n", eth_get_name());
#endif
CDPSeq = 0;
CDPOK = 0;
CDPNativeVLAN = htons(-1);
CDPApplianceVLAN = htons(-1);
NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
NetSetHandler (CDPDummyHandler);
CDPSendTrigger();
}
#endif /* CFG_CMD_CDP */
void
NetReceive(volatile uchar * inpkt, int len)
{
Ethernet_t *et;
IP_t *ip;
ARP_t *arp;
IPaddr_t tmp;
int x;
uchar *pkt;
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
int iscdp;
#endif
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;
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
/* keep track if packet is CDP */
iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
#endif
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
#if (CONFIG_COMMANDS & CFG_CMD_CDP)
&& iscdp == 0
#endif
)
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 (CONFIG_COMMANDS & CFG_CMD_CDP)
if (iscdp) {
CDPHandler((uchar *)ip, len);
return;
}
#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 packates 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);
(void) eth_send((uchar *)et, (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);
putc(' ');
break;
#if (CONFIG_COMMANDS & CFG_CMD_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);
break;
#endif
default:
return;
}
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
return;
}
#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)
{
switch (protocol) {
/* Fall through */
#if (CONFIG_COMMANDS & CFG_CMD_PING)
case PING:
if (NetPingIP == 0) {
puts ("*** ERROR: ping address not given\n");
return (1);
}
goto common;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
case SNTP:
if (NetNtpServerIP == 0) {
puts ("*** ERROR: NTP server address not given\n");
return (1);
}
goto common;
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NFS)
case NFS:
#endif
case NETCONS:
case TFTP:
if (NetServerIP == 0) {
puts ("*** ERROR: `serverip' not set\n");
return (1);
}
#if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP))
common:
#endif
if (NetOurIP == 0) {
puts ("*** ERROR: `ipaddr' not set\n");
return (1);
}
/* Fall through */
case DHCP:
case RARP:
case BOOTP:
case CDP:
if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
#ifdef CONFIG_NET_MULTI
extern int eth_get_dev_index (void);
int num = eth_get_dev_index ();
switch (num) {
case -1:
puts ("*** ERROR: No ethernet found.\n");
return (1);
case 0:
puts ("*** ERROR: `ethaddr' not set\n");
break;
default:
printf ("*** ERROR: `eth%daddr' not set\n",
num);
break;
}
NetStartAgain ();
return (2);
#else
puts ("*** ERROR: `ethaddr' not set\n");
return (1);
#endif
}
/* Fall through */
default:
return (0);
}
return (0); /* OK */
}
/**********************************************************************/
int
NetCksumOk(uchar * ptr, int len)
{
return !((NetCksum(ptr, len) + 1) & 0xfffe);
}
unsigned
NetCksum(uchar * ptr, int len)
{
ulong xsum;
xsum = 0;
while (len-- > 0)
xsum += *((ushort *)ptr)++;
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(volatile 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(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
{
volatile 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);
}
void copy_filename (uchar *dst, uchar *src, int size)
{
if (*src && (*src == '"')) {
++src;
--size;
}
while ((--size > 0) && *src && (*src != '"')) {
*dst++ = *src++;
}
*dst = '\0';
}
#endif /* CFG_CMD_NET */
void 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)
);
}
IPaddr_t string_to_ip(char *s)
{
IPaddr_t addr;
char *e;
int i;
if (s == NULL)
return(0);
for (addr=0, i=0; i<4; ++i) {
ulong val = s ? simple_strtoul(s, &e, 10) : 0;
addr <<= 8;
addr |= (val & 0xFF);
if (s) {
s = (*e) ? e+1 : e;
}
}
return (htonl(addr));
}
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(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);
}
IPaddr_t getenv_IPaddr (char *var)
{
return (string_to_ip(getenv(var)));
}
ushort getenv_VLAN(char *var)
{
return (string_to_VLAN(getenv(var)));
}
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