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ctc_lcs.c
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// ====================================================================
// Hercules LAN Channel Station Support
// ====================================================================
//
// Copyright (C) 2002-2006 by James A. Pierson
#include "hstdinc.h"
#include "hercules.h"
#include "ctcadpt.h"
#include "tuntap.h"
#include "hercifc.h"
#include "opcode.h"
#include "herc_getopt.h"
/* CCW Codes 0x03 & 0xC3 are immediate commands */
static BYTE CTC_Immed_Commands[256]=
{ 0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
// ====================================================================
// Declarations
// ====================================================================
static void LCS_Startup( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_Shutdown( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_StartLan( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_StopLan( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_QueryIPAssists( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_LanStats( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void LCS_DefaultCmdProc( PLCSDEV pLCSDEV, PLCSHDR pHeader );
static void* LCS_PortThread( PLCSPORT pPort );
static int LCS_EnqueueEthFrame( PLCSDEV pLCSDEV, BYTE bPort,
BYTE* pData, size_t iSize );
static void* LCS_FixupReplyFrame( PLCSDEV pLCSDEV,
size_t iSize, PLCSHDR pHeader );
static int BuildOAT( char* pszOATName, PLCSBLK pLCSBLK );
static char* ReadOAT( char* pszOATName, FILE* fp, char* pszBuff );
static int ParseArgs( DEVBLK* pDEVBLK, PLCSBLK pLCSBLK,
int argc, char** argv );
// ====================================================================
// find_group_device
// ====================================================================
static DEVBLK * find_group_device(DEVGRP *group, U16 devnum)
{
int i;
for(i = 0; i < group->acount; i++)
if( group->memdev[i]->devnum == devnum )
return group->memdev[i];
return NULL;
}
//
// LCS_Init
//
int LCS_Init( DEVBLK* pDEVBLK, int argc, char *argv[] )
{
PLCSBLK pLCSBLK;
PLCSDEV pLCSDev;
int i;
struct in_addr addr; // Work area for addresses
pDEVBLK->devtype = 0x3088;
// Return when an existing group has been joined but is still incomplete
if(!group_device(pDEVBLK, 0) && pDEVBLK->group)
return 0;
// We need to create a group, and as such determine the number of devices
if(!pDEVBLK->group)
{
// Housekeeping
pLCSBLK = malloc( sizeof( LCSBLK ) );
if( !pLCSBLK )
{
logmsg( _("HHCLC001E %4.4X unable to allocate LCSBLK\n"),
pDEVBLK->devnum );
return -1;
}
memset( pLCSBLK, 0, sizeof( LCSBLK ) );
for( i = 0; i < LCS_MAX_PORTS; i++ )
{
memset( &pLCSBLK->Port[i], 0, sizeof ( LCSPORT ) );
pLCSBLK->Port[i].bPort = i;
pLCSBLK->Port[i].pLCSBLK = pLCSBLK;
// Initialize locking and event mechanisms
initialize_lock( &pLCSBLK->Port[i].Lock );
initialize_lock( &pLCSBLK->Port[i].EventLock );
initialize_condition( &pLCSBLK->Port[i].Event );
}
// Parse configuration file statement
if( ParseArgs( pDEVBLK, pLCSBLK, argc, (char**)argv ) != 0 )
{
free( pLCSBLK );
pLCSBLK = NULL;
return -1;
}
if( pLCSBLK->pszOATFilename )
{
// If an OAT file was specified, Parse it and build the
// OAT table.
if( BuildOAT( pLCSBLK->pszOATFilename, pLCSBLK ) != 0 )
{
free( pLCSBLK );
pLCSBLK = NULL;
return -1;
}
}
else
{
// Otherwise, build an OAT based on the address specified
// in the config file with an assumption of IP mode.
pLCSBLK->pDevices = malloc( sizeof( LCSDEV ) );
memset( pLCSBLK->pDevices, 0, sizeof( LCSDEV ) );
if( pLCSBLK->pszIPAddress )
inet_aton( pLCSBLK->pszIPAddress, &addr );
pLCSBLK->pDevices->sAddr = pDEVBLK->devnum;
pLCSBLK->pDevices->bMode = LCSDEV_MODE_IP;
pLCSBLK->pDevices->bPort = 0;
pLCSBLK->pDevices->bType = 0;
pLCSBLK->pDevices->lIPAddress = addr.s_addr;
pLCSBLK->pDevices->pszIPAddress = pLCSBLK->pszIPAddress;
pLCSBLK->pDevices->pNext = NULL;
pLCSBLK->icDevices = 2;
}
// Now we must create the group
if(!group_device(pDEVBLK, pLCSBLK->icDevices))
{
pDEVBLK->group->grp_data = pLCSBLK;
return 0;
}
else
pDEVBLK->group->grp_data = pLCSBLK;
}
else
pLCSBLK = pDEVBLK->group->grp_data;
// When this code is reached the last devblk has been allocated...
//
// Now build the LCSDEV's.
// If an OAT is specified, the addresses that were specified in the
// hercules.cnf file must match those that are specified in the OAT.
for( pLCSDev = pLCSBLK->pDevices; pLCSDev; pLCSDev = pLCSDev->pNext )
{
pLCSDev->pDEVBLK[0] = find_group_device(pDEVBLK->group, pLCSDev->sAddr);
if( !pLCSDev->pDEVBLK[0] )
{
logmsg(D_("HHCLC040E %4.4X LCSDEV %4.4X not in configuration\n"),
pDEVBLK->group->memdev[0]->devnum, pLCSDev->sAddr );
return -1;
}
// Establish SENSE ID and Command Information Word data.
SetSIDInfo( pLCSDev->pDEVBLK[0], 0x3088, 0x60, 0x3088, 0x01 );
// SetCIWInfo( pLCSDev->pDEVBLK[0], 0, 0, 0x72, 0x0080 );
// SetCIWInfo( pLCSDev->pDEVBLK[0], 1, 1, 0x83, 0x0004 );
// SetCIWInfo( pLCSDev->pDEVBLK[0], 2, 2, 0x82, 0x0040 );
pLCSDev->pDEVBLK[0]->ctctype = CTC_LCS;
pLCSDev->pDEVBLK[0]->ctcxmode = 1;
pLCSDev->pDEVBLK[0]->dev_data = pLCSDev;
pLCSDev->pLCSBLK = pLCSBLK;
strcpy( pLCSDev->pDEVBLK[0]->filename, pLCSBLK->pszTUNDevice );
// If this is an IP Passthru address, we need a write address
if( pLCSDev->bMode == LCSDEV_MODE_IP )
{
pLCSDev->pDEVBLK[1] = find_group_device(pDEVBLK->group, pLCSDev->sAddr^1);
if( !pLCSDev->pDEVBLK[1] )
{
logmsg(D_("HHCLC040E %4.4X LCSDEV %4.4X not in configuration\n"),
pDEVBLK->group->memdev[0]->devnum, pLCSDev->sAddr^1 );
return -1;
}
// Establish SENSE ID and Command Information Word data.
SetSIDInfo( pLCSDev->pDEVBLK[1], 0x3088, 0x60, 0x3088, 0x01 );
// SetCIWInfo( pLCSDev->pDEVBLK[1], 0, 0, 0x72, 0x0080 );
// SetCIWInfo( pLCSDev->pDEVBLK[1], 1, 1, 0x83, 0x0004 );
// SetCIWInfo( pLCSDev->pDEVBLK[1], 2, 2, 0x82, 0x0040 );
pLCSDev->pDEVBLK[1]->ctctype = CTC_LCS;
pLCSDev->pDEVBLK[1]->ctcxmode = 1;
pLCSDev->pDEVBLK[1]->dev_data = pLCSDev;
strcpy( pLCSDev->pDEVBLK[1]->filename, pLCSBLK->pszTUNDevice );
}
// Indicate that the DEVBLK(s) have been create sucessfully
pLCSDev->fCreated = 1;
// Initialize locking and event mechanisms
initialize_lock( &pLCSDev->Lock );
initialize_lock( &pLCSDev->EventLock );
initialize_condition( &pLCSDev->Event );
// Create the TAP interface (if not already created by a
// previous pass. More than one interface can exist on a port.
if( !pLCSBLK->Port[pLCSDev->bPort].fCreated )
{
ATTR thread_attr;
int rc;
rc = TUNTAP_CreateInterface( pLCSBLK->pszTUNDevice,
IFF_TAP | IFF_NO_PI,
&pLCSBLK->Port[pLCSDev->bPort].fd,
pLCSBLK->Port[pLCSDev->bPort].szNetDevName );
// Indicate that the port is used.
pLCSBLK->Port[pLCSDev->bPort].fUsed = 1;
pLCSBLK->Port[pLCSDev->bPort].fCreated = 1;
initialize_join_attr( &thread_attr );
create_thread( &pLCSBLK->Port[pLCSDev->bPort].tid,
&thread_attr, LCS_PortThread,
&pLCSBLK->Port[pLCSDev->bPort],
"LCS_PortThread" );
/* Identify the thread ID with the devices on which they are active */
pLCSDev->pDEVBLK[0]->tid = pLCSBLK->Port[pLCSDev->bPort].tid;
if (pLCSDev->pDEVBLK[1])
pLCSDev->pDEVBLK[1]->tid = pLCSBLK->Port[pLCSDev->bPort].tid;
}
// Add these devices to the ports device list.
pLCSBLK->Port[pLCSDev->bPort].icDevices++;
pLCSDev->pDEVBLK[0]->fd = pLCSBLK->Port[pLCSDev->bPort].fd;
if( pLCSDev->pDEVBLK[1] )
{
pLCSBLK->Port[pLCSDev->bPort].icDevices++;
pLCSDev->pDEVBLK[1]->fd = pLCSBLK->Port[pLCSDev->bPort].fd;
}
}
return 0;
}
//
// LCS_ExecuteCCW
//
void LCS_ExecuteCCW( DEVBLK* pDEVBLK, BYTE bCode,
BYTE bFlags, BYTE bChained,
U16 sCount, BYTE bPrevCode,
int iCCWSeq, BYTE* pIOBuf,
BYTE* pMore, BYTE* pUnitStat,
U16* pResidual )
{
int iNum; // Number of bytes to move
BYTE bOpCode; // CCW opcode with modifier
// bits masked off
UNREFERENCED( bFlags );
UNREFERENCED( bChained );
UNREFERENCED( bPrevCode );
UNREFERENCED( iCCWSeq );
// Intervention required if the device file is not open
if( pDEVBLK->fd < 0 &&
!IS_CCW_SENSE( bCode ) &&
!IS_CCW_CONTROL( bCode ) )
{
pDEVBLK->sense[0] = SENSE_IR;
*pUnitStat = CSW_CE | CSW_DE | CSW_UC;
return;
}
// Mask off the modifier bits in the CCW bOpCode
if( ( bCode & 0x07 ) == 0x07 )
bOpCode = 0x07;
else if( ( bCode & 0x03 ) == 0x02 )
bOpCode = 0x02;
else if( ( bCode & 0x0F ) == 0x0C )
bOpCode = 0x0C;
else if( ( bCode & 0x03 ) == 0x01 )
bOpCode = pDEVBLK->ctcxmode ? ( bCode & 0x83 ) : 0x01;
else if( ( bCode & 0x1F ) == 0x14 )
bOpCode = 0x14;
else if( ( bCode & 0x47 ) == 0x03 )
bOpCode = 0x03;
else if( ( bCode & 0xC7 ) == 0x43 )
bOpCode = 0x43;
#if 0
// Special case for LCS CIW's
else if( ( bCode == 72 || bCode == 82 || bCode == 83 ) )
bOpCode == bCode;
#endif
else
bOpCode = bCode;
// Process depending on CCW bOpCode
switch (bOpCode)
{
case 0x01: // 0MMMMM01 WRITE
//------------------------------------------------------------
// WRITE
//------------------------------------------------------------
// Return normal status if CCW count is zero
if( sCount == 0 )
{
*pUnitStat = CSW_CE | CSW_DE;
break;
}
LCS_Write( pDEVBLK, sCount, pIOBuf, pUnitStat, pResidual );
break;
case 0x81: // 1MMMMM01 WEOF
//------------------------------------------------------------
// WRITE EOF
//------------------------------------------------------------
// Return normal status
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0x02: // MMMMMM10 READ
case 0x0C: // MMMM1100 RDBACK
// -----------------------------------------------------------
// READ & READ BACKWARDS
// -----------------------------------------------------------
// Read data and set unit status and residual byte count
LCS_Read( pDEVBLK, sCount, pIOBuf, pUnitStat, pResidual, pMore );
break;
case 0x07: // MMMMM111 CTL
// -----------------------------------------------------------
// CONTROL
// -----------------------------------------------------------
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0x03: // M0MMM011 NOP
// -----------------------------------------------------------
// CONTROL NO-OPERATON
// -----------------------------------------------------------
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0x43: // 00XXX011 SBM
// -----------------------------------------------------------
// SET BASIC MODE
// -----------------------------------------------------------
// Command reject if in basic mode
if( pDEVBLK->ctcxmode == 0 )
{
pDEVBLK->sense[0] = SENSE_CR;
*pUnitStat = CSW_CE | CSW_DE | CSW_UC;
break;
}
// Reset extended mode and return normal status
pDEVBLK->ctcxmode = 0;
*pResidual = 0;
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0xC3: // 11000011 SEM
// -----------------------------------------------------------
// SET EXTENDED MODE
// -----------------------------------------------------------
pDEVBLK->ctcxmode = 1;
*pResidual = 0;
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0xE3: // 11100011
// -----------------------------------------------------------
// PREPARE (PREP)
// -----------------------------------------------------------
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0x14: // XXX10100 SCB
// -----------------------------------------------------------
// SENSE COMMAND BYTE
// -----------------------------------------------------------
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0x04: // 00000100 SENSE
// -----------------------------------------------------------
// SENSE
// -----------------------------------------------------------
// Command reject if in basic mode
if( pDEVBLK->ctcxmode == 0 )
{
pDEVBLK->sense[0] = SENSE_CR;
*pUnitStat = CSW_CE | CSW_DE | CSW_UC;
break;
}
// Calculate residual byte count
iNum = ( sCount < pDEVBLK->numsense ) ?
sCount : pDEVBLK->numsense;
*pResidual = sCount - iNum;
if( sCount < pDEVBLK->numsense )
*pMore = 1;
// Copy device sense bytes to channel I/O buffer
memcpy( pIOBuf, pDEVBLK->sense, iNum );
// Clear the device sense bytes
memset( pDEVBLK->sense, 0, sizeof( pDEVBLK->sense ) );
// Return unit status
*pUnitStat = CSW_CE | CSW_DE;
break;
case 0xE4: // 11100100 SID
// -----------------------------------------------------------
// SENSE ID
// -----------------------------------------------------------
// Calculate residual byte count
iNum = ( sCount < pDEVBLK->numdevid ) ?
sCount : pDEVBLK->numdevid;
*pResidual = sCount - iNum;
if( sCount < pDEVBLK->numdevid )
*pMore = 1;
// Copy device identifier bytes to channel I/O buffer
memcpy( pIOBuf, pDEVBLK->devid, iNum );
// Return unit status
*pUnitStat = CSW_CE | CSW_DE;
break;
#if 0
case 0x72: // 0111010 RCD
// ------------------------------------------------------------
// READ CONFIGURATION DATA
// ------------------------------------------------------------
case 0x82: // 10000010 SID
// ------------------------------------------------------------
// SET INTERFACE IDENTIFER
// ------------------------------------------------------------
case 0x83: // 10000011 RID
// ------------------------------------------------------------
// READ NODE IDENTIFER
// ------------------------------------------------------------
LCS_SDC( pDEVBLK, bOpCode, sCount, pIOBuf,
pUnitStat, pResidual, pMore );
break;
#endif
default:
// ------------------------------------------------------------
// INVALID OPERATION
// ------------------------------------------------------------
// Set command reject sense byte, and unit check status
pDEVBLK->sense[0] = SENSE_CR;
*pUnitStat = CSW_CE | CSW_DE | CSW_UC;
}
}
//
// LCS_Close
//
int LCS_Close( DEVBLK* pDEVBLK )
{
PLCSDEV pLCSDEV = (PLCSDEV)pDEVBLK->dev_data;
PLCSBLK pLCSBLK = pLCSDEV->pLCSBLK;
PLCSPORT pPort = &pLCSBLK->Port[pLCSDEV->bPort];
pPort->icDevices--;
// Is this the last device on the port?
if( !pPort->icDevices )
{
// PROGRAMMING NOTE: there's currently no way to interrupt
// the "LCS_PortThread"s TUNTAP_Read of the adapter. Thus
// we must simply wait for LCS_PortThread to eventually
// notice that we're doing a close (via our setting of the
// fCloseInProgress flag). Its TUNTAP_Read will eventually
// timeout after a few seconds (currently 5, which is dif-
// ferent than the CTC_READ_TIMEOUT_SECS timeout value the
// CTCI_Read function uses) and will then do the close of
// the adapter for us (TUNTAP_Close) so we don't have to.
// All we need to do is ask it to exit (via our setting of
// the fCloseInProgress flag) and then wait for it to exit
// (which, as stated, could take up to a max of 5 seconds).
// All of this is simply because it's poor form to close a
// device from one thread while another thread is reading
// from it. Attempting to do so could trip a race condition
// wherein the internal i/o buffers used to process the
// read request could have been freed (by the close call)
// by the time the read request eventually gets serviced.
if( pPort->fd >= 0 )
{
TID tid = pPort->tid;
obtain_lock( &pPort->EventLock );
{
pPort->fStarted = 0;
pPort->fCloseInProgress = 1;
signal_condition( &pPort->Event );
}
release_lock( &pPort->EventLock );
signal_thread( tid, SIGUSR2 );
join_thread( tid, NULL );
detach_thread( tid );
}
if( pLCSDEV->pDEVBLK[0] && pLCSDEV->pDEVBLK[0]->fd >= 0 )
pLCSDEV->pDEVBLK[0]->fd = -1;
if( pLCSDEV->pDEVBLK[1] && pLCSDEV->pDEVBLK[1]->fd >= 0 )
pLCSDEV->pDEVBLK[1]->fd = -1;
}
// Housekeeping
if( pLCSDEV->pDEVBLK[0] == pDEVBLK )
pLCSDEV->pDEVBLK[0] = NULL;
if( pLCSDEV->pDEVBLK[1] == pDEVBLK )
pLCSDEV->pDEVBLK[1] = NULL;
if( !pLCSDEV->pDEVBLK[0] &&
!pLCSDEV->pDEVBLK[1] )
{
PLCSDEV pDev = NULL;
PLCSDEV* ppPrev = &pLCSBLK->pDevices;
for( pDev = pLCSBLK->pDevices; pDev; pDev = pDev->pNext )
{
if( pDev == pLCSDEV )
{
*ppPrev = pDev->pNext;
if( pDev->pszIPAddress )
{
free( pDev->pszIPAddress );
pDev->pszIPAddress = NULL;
}
free( pLCSDEV );
pLCSDEV = NULL;
break;
}
ppPrev = &pDev->pNext;
}
}
if( !pLCSBLK->pDevices )
{
if( pLCSBLK->pszTUNDevice ) { free( pLCSBLK->pszTUNDevice ); pLCSBLK->pszTUNDevice = NULL; }
if( pLCSBLK->pszOATFilename ) { free( pLCSBLK->pszOATFilename ); pLCSBLK->pszOATFilename = NULL; }
// if( pLCSBLK->pszIPAddress ) { free( pLCSBLK->pszIPAddress ); pLCSBLK->pszIPAddress = NULL; }
if( pLCSBLK->pszMACAddress ) { free( pLCSBLK->pszMACAddress ); pLCSBLK->pszMACAddress = NULL; }
if( pLCSBLK->pszOATFilename )
{
if( pLCSBLK->pszIPAddress )
{
free( pLCSBLK->pszIPAddress );
pLCSBLK->pszIPAddress = NULL;
}
}
free( pLCSBLK );
pLCSBLK = NULL;
}
pDEVBLK->dev_data = NULL;
return 0;
}
//
// LCS_Query
//
void LCS_Query( DEVBLK* pDEVBLK, char** ppszClass,
int iBufLen, char* pBuffer )
{
char *sType[] = { "", " Pri", " Sec" };
PLCSDEV pLCSDEV = (PLCSDEV)pDEVBLK->dev_data;
*ppszClass = "CTCA";
if(!pLCSDEV)
{
strlcpy(pBuffer,"*Uninitialised",iBufLen);
return;
}
snprintf( pBuffer, iBufLen, "LCS Port %2.2X %s%s (%s)",
pLCSDEV->bPort,
pLCSDEV->bMode == LCSDEV_MODE_IP ? "IP" : "SNA",
sType[pLCSDEV->bType],
pLCSDEV->pLCSBLK->Port[pLCSDEV->bPort].szNetDevName );
}
//
// LCS_Read
//
void LCS_Read( DEVBLK* pDEVBLK, U16 sCount,
BYTE* pIOBuf, BYTE* pUnitStat,
U16* pResidual, BYTE* pMore )
{
PLCSHDR pFrame;
PLCSDEV pLCSDEV = (PLCSDEV)pDEVBLK->dev_data;
size_t iLength = 0;
int rc = 0;
for ( ; ; )
{
obtain_lock( &pLCSDEV->Lock );
if( !( pLCSDEV->fDataPending || pLCSDEV->fReplyPending ) )
{
struct timespec waittime;
struct timeval now;
release_lock( &pLCSDEV->Lock );
// Wait 5 seconds then check for channel conditions
gettimeofday( &now, NULL );
waittime.tv_sec = now.tv_sec + CTC_READ_TIMEOUT_SECS;
waittime.tv_nsec = now.tv_usec * 1000;
obtain_lock( &pLCSDEV->EventLock );
rc = timed_wait_condition( &pLCSDEV->Event,
&pLCSDEV->EventLock,
&waittime );
release_lock( &pLCSDEV->EventLock );
if( rc == ETIMEDOUT || rc == EINTR )
{
// check for halt condition
if( pDEVBLK->scsw.flag2 & SCSW2_FC_HALT ||
pDEVBLK->scsw.flag2 & SCSW2_FC_CLEAR )
{
if( pDEVBLK->ccwtrace || pDEVBLK->ccwstep )
logmsg( _("HHCLC002I %4.4X: Halt or Clear Recognized\n"),
pDEVBLK->devnum );
*pUnitStat = CSW_CE | CSW_DE;
*pResidual = sCount;
return;
}
continue;
}
obtain_lock( &pLCSDEV->Lock );
}
// Fix-up frame pointer
pFrame = (PLCSHDR)( pLCSDEV->bFrameBuffer +
pLCSDEV->iFrameOffset );
// Terminate the frame buffer
STORE_HW( pFrame->hwOffset, 0x0000 );
iLength = pLCSDEV->iFrameOffset + 2;
if( sCount < iLength )
{
*pMore = 1;
*pResidual = 0;
iLength = sCount;
}
else
{
*pMore = 0;
*pResidual -= iLength;
}
*pUnitStat = CSW_CE | CSW_DE;
memcpy( pIOBuf, pLCSDEV->bFrameBuffer, iLength );
// Trace the IP packet before sending to TAP device
if( pDEVBLK->ccwtrace || pDEVBLK->ccwstep )
{
logmsg( _("HHCLC003I %4.4X: LCS Read Buffer:\n"),
pDEVBLK->devnum );
packet_trace( pLCSDEV->bFrameBuffer, iLength );
}
// Reset frame buffer
pLCSDEV->iFrameOffset = 0;
pLCSDEV->fReplyPending = 0;
pLCSDEV->fDataPending = 0;
release_lock( &pLCSDEV->Lock );
return;
}
}
//
// LCS_Write
//
void LCS_Write( DEVBLK* pDEVBLK, U16 sCount,
BYTE* pIOBuf, BYTE* pUnitStat,
U16* pResidual )
{
PLCSHDR pHeader = NULL;
PLCSDEV pLCSDEV = (PLCSDEV)pDEVBLK->dev_data;
PLCSETHFRM pEthFrame = NULL;
U16 iOffset = 0;
U16 iPrevOffset = 0;
U16 iLength = 0;
UNREFERENCED( sCount );
//
// Process each frame in the buffer
//
while( 1 )
{
// Fix-up the LCS header pointer to the current frame
pHeader = (PLCSHDR)( pIOBuf + iOffset );
iPrevOffset = iOffset;
// Get the next frame offset, exit loop if 0
FETCH_HW( iOffset, pHeader->hwOffset );
if( iOffset == 0 )
break;
iLength = iOffset - iPrevOffset;
switch( pHeader->bType )
{
case LCS_FRAME_TYPE_CNTL: // LCS Command Frame
{
if( pHeader->bInitiator == 0x01 )
break;
switch( pHeader->bCmdCode )
{
case LCS_STARTUP: // Start Host
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Startup\n"),pDEVBLK->devnum);
LCS_Startup( pLCSDEV, pHeader );
break;
case LCS_SHUTDOWN: // Shutdown Host
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Shutdown\n"),pDEVBLK->devnum);
LCS_Shutdown( pLCSDEV, pHeader );
break;
case LCS_STRTLAN: // Start LAN
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Start LAN\n"),pDEVBLK->devnum);
LCS_StartLan( pLCSDEV, pHeader );
break;
case LCS_STOPLAN: // Stop LAN
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Stop LAN\n"),pDEVBLK->devnum);
LCS_StopLan( pLCSDEV, pHeader );
break;
case LCS_QIPASSIST: // Query IP Assists
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Query\n"),pDEVBLK->devnum);
LCS_QueryIPAssists( pLCSDEV, pHeader );
break;
case LCS_LANSTAT: // LAN Stats
if( pLCSDEV->pLCSBLK->fDebug )
logmsg( _("HHCLCxxxI %4.4X: Stat\n"),pDEVBLK->devnum);
LCS_LanStats( pLCSDEV, pHeader );
break;
// ZZ FIXME: Once multicasting support is confirmed in tuntap
// and/or TunTap32, we need to add support in Herc by handling
// the below LCS_SETIPM and LCS_DELIPM frames and issuing an
// ioctl( SIOCADDMULTI ) request to tuntap/TunTap32...
case LCS_SETIPM: // Set IP Multicast
case LCS_DELIPM: // Delete IP Multicast?
case LCS_GENSTAT: // General Stats?
case LCS_LISTLAN: // List LAN
case LCS_LISTLAN2: // No Clue
case LCS_TIMING: // Timing request
default:
LCS_DefaultCmdProc( pLCSDEV, pHeader );
break;
}
}
break;
case LCS_FRAME_TYPE_ENET: // Ethernet
case LCS_FRAME_TYPE_TR: // Token Ring
case LCS_FRAME_TYPE_FDDI: // FDDI
case LCS_FRAME_TYPE_AUTO: // auto-detect
pEthFrame = (PLCSETHFRM)pHeader;
// Trace the IP packet before sending to TAP device
if( pDEVBLK->ccwtrace || pDEVBLK->ccwstep )
{
logmsg( _("HHCLC004I %4.4X: Sending packet to %s:\n"),
pDEVBLK->devnum, pDEVBLK->filename );
packet_trace( pEthFrame->bData, iLength );
}
// Write the ethernet frame to the TUN device
if( TUNTAP_Write( pDEVBLK->fd,
pEthFrame->bData, iLength ) != iLength )
{
logmsg( _("HHCLC005E %4.4X: Error writing to %s: %s\n"),
pDEVBLK->devnum, pDEVBLK->filename,
strerror( errno ) );
pDEVBLK->sense[0] = SENSE_EC;
*pUnitStat = CSW_CE | CSW_DE | CSW_UC;
return;
}
break;
}
}
*pResidual = 0;
*pUnitStat = CSW_CE | CSW_DE;
if( pLCSDEV->fReplyPending )
{
if( pDEVBLK->ccwtrace || pDEVBLK->ccwstep )
logmsg( _("HHCLC006I %4.4X Triggering Event.\n"),
pDEVBLK->devnum );
obtain_lock( &pLCSDEV->EventLock );
signal_condition( &pLCSDEV->Event );
release_lock( &pLCSDEV->EventLock );
}
}
#if 0
//
// LCS_SDC
//
void LCS_SDC( DEVBLK* pDEVBLK, BYTE bOpCode,
U16 sCount, BYTE* pIOBuf,
BYTE* UnitStat, U16* pResidual,
BYTE* pMore )
{
PLCSDEV pLCSDEV = (PLCSDEV)pDEVBLK->dev_data;
PLCSBLK pLCSBLK = pLCSDEV->pLCSBLK;
switch( bOpCode )
{
case 0x72: // 0111010 RCD
// ------------------------------------------------------------
// READ CONFIGURATION DATA
// ------------------------------------------------------------
SDC_CreateNED( pIOBuf, 0,
NED_EMULATION,
NED_TYPE_DEV,
NED_CLASS_CTCA,
0,
"003088", "001",
"", "", "", 0 );
SDC_CreateNED( pIOBuf, 1,
NED_SERIAL_VALID,
NED_TYPE_DEV,
NED_CLASS_UNSPECIFIED,
0,
"003172", "000",
"HDG", "00",
pLCSBLK->szSerialNumber,
pLCSDEV->bPort );
SDC_CreateGeneralNEQ( pIOBuf, 2,
0, // Interface ID
60, // Timeout
NULL ); // Extended Info
SDC_CreateNED( pIOBuf, 3,
NED_TOKEN | NED_SERIAL_UNIQUE,
NED_TYPE_DEV,
NED_CLASS_UNSPECIFIED,
0,
"003172", "000",
"HDG", "00",
pLCSBLK->szSerialNumber,
0 );
break;
case 0x82: // 10000010 SID
// ------------------------------------------------------------
// SET INTERFACE IDENTIFER
// ------------------------------------------------------------
break;
case 0x83: // 10000011 RID
// ------------------------------------------------------------
// READ NODE IDENTIFER
// ------------------------------------------------------------
break;
}
}
#endif
// ====================================================================
// LCS_Startup
// ====================================================================
static void LCS_Startup( PLCSDEV pLCSDEV, PLCSHDR pHeader )
{
PLCSSTRTFRM pCmd;
PLCSSTDFRM pReply;
// Get a pointer to the next available reply frame
pReply = (PLCSSTDFRM)LCS_FixupReplyFrame( pLCSDEV,
sizeof( LCSSTDFRM ),
pHeader );
// PROGRAMMING NOTE: pReply now points to a reply frame
// the first part of which is an LCSHDR which, except for
// the 'hwOffset' field, is an exact copy of the LCSHDR
// that was passed to us...
pReply->bLCSHdr.bLanType = LCS_FRAME_TYPE_ENET;
pReply->bLCSHdr.bRelAdapterNo = pLCSDEV->bPort;