/****************************************************************
 *								*
 *	Copyright 2001, 2009 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

#include "mdef.h"

#ifdef VMS
#  include <descrip.h>
#  include <rms.h>
#  include <ssdef.h>
#elif defined(UNIX)
#  include "gtm_unistd.h"
#  include <errno.h>
#  include "parse_file.h"
#  include "gtm_stdlib.h"
#endif

#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "cmidef.h"
#include "hashtab_mname.h"	/* needed for cmmdef.h */
#include "cmmdef.h"
#include "stringpool.h"
#include "gtm_string.h"
#include "iosp.h"
#include "gvcmy_open.h"
#include "gvcmy_close.h"
#include "trans_log_name.h"
#include "gvcmz.h"
#include "copy.h"
#include "error.h"
#include "op.h"

GBLREF spdesc stringpool;

#define GTCM_ENVVAR_PFX "GTCM_"
#define GTCM_ENVVAR_PFXLEN (SIZEOF(GTCM_ENVVAR_PFX) - 1)

#ifdef VMS
void gvcmy_open(gd_region *reg, struct NAM *nb)
#else
void gvcmy_open(gd_region *reg, parse_blk *pb)
#endif
{
	struct CLB	*clb_ptr;
	link_info	*li;
	unsigned char	*ptr, *top, *fn, *libuff;
	char		*trans_name;
	bool		new = FALSE;
	int		len;
	int4		status;
	cmi_descriptor	node;
	mstr		task1, task2;
	unsigned char	buff[256], lbuff[MAX_HOST_NAME_LEN + GTCM_ENVVAR_PFXLEN];
	short		temp_short;
	VMS_ONLY($DESCRIPTOR(task, "GTCMSVR");)
	UNIX_ONLY(MSTR_DEF(task, 0, NULL);)

	error_def(ERR_BADSRVRNETMSG);
	error_def(ERR_INVNETFILNM);
	error_def(ERR_LOGTOOLONG);
	error_def(ERR_NETDBOPNERR);
	error_def(ERR_SYSCALL);

	ESTABLISH(gvcmy_open_ch);
#ifdef VMS
	if (!nb->nam$b_node)
		rts_error(VARLSTCNT(1) ERR_INVNETFILNM);
	top = nb->nam$l_esa + nb->nam$b_esl;
	fn = nb->nam$l_node + nb->nam$b_node;
	node.dsc$b_dtype = task.dsc$b_dtype = 14;
	node.dsc$b_class = task.dsc$b_class = 1;
	node.dsc$w_length = nb->nam$b_node - 2;
	node.dsc$a_pointer = nb->nam$l_node;
	task1.addr = "GTCMSVRNAM";
	task1.len = SIZEOF("GTCMSVRNAM") - 1;
	status = TRANS_LOG_NAME(&task1, &task2, (char *)buff, SIZEOF(buff), dont_sendmsg_on_log2long);
#elif defined(UNIX)
	if (!pb->b_node)
		rts_error(VARLSTCNT(1) ERR_INVNETFILNM);
	fn = (unsigned char *)pb->l_dir;
	top = fn + pb->b_esl - pb->b_node; 	/* total length except node gives end of string */
	/*
	   The "task" value for unix comes from a logical of the form GTCM_<hostname>. This value
	   has the form of "<hostname or ip:>portnum". If the optional hostname or ip is specified
	   as part of the value, it will override the node value from the global directory. That
	   processing is handled down in the CMI layer.
	*/
	node.addr = pb->l_node;
	node.len = pb->b_node - 1;
	memcpy(lbuff, GTCM_ENVVAR_PFX, GTCM_ENVVAR_PFXLEN);
	memcpy(lbuff + GTCM_ENVVAR_PFXLEN, node.addr, node.len);
	task1.addr = (char *)lbuff;
	task1.len = node.len + (int)GTCM_ENVVAR_PFXLEN;
	lbuff[task1.len] = '\0';
	task2.addr = (char *)buff;
	task2.len = 0;
	if (NULL != (trans_name = GETENV((const char *)lbuff)))
	{
		status = SS_NORMAL;
		task2.len = STRLEN(trans_name);
		memcpy(task2.addr, trans_name, task2.len);
	} else
		status = SS_NOLOGNAM;
#else
#  error "Undefined platform"
#endif
	if (SS_NOLOGNAM != status)
	{
		if (SS_NORMAL != status)
		{
#			ifdef UNIX
			if (SS_LOG2LONG == status)
				rts_error(VARLSTCNT(5) ERR_LOGTOOLONG, 3, task1.len, task1.addr, SIZEOF(buff) - 1);
			else
#			endif
				rts_error(VARLSTCNT(1) status);
		}
		VMS_ONLY(
			task.dsc$a_pointer = buff;
			task.dsc$w_length = task2.len;
			);
		UNIX_ONLY(
			task.addr = (char *)task2.addr;
			task.len = task2.len;
			);
	}
	clb_ptr = cmu_getclb(&node, &task);
	if (!clb_ptr)		/* If link not open */
	{
		new = TRUE;
		clb_ptr = gvcmz_netopen(clb_ptr, &node, &task);
	} else
	{
		assert(((link_info *)clb_ptr->usr)->lnk_active);
		len = (int)(top - fn + 2 + S_HDRSIZE);
		if (len <  CM_MINBUFSIZE)
			len = CM_MINBUFSIZE;
		ENSURE_STP_FREE_SPACE(len);
		clb_ptr->mbf = stringpool.free;
		clb_ptr->mbl = len;
	}
	li = (link_info *)clb_ptr->usr;
	clb_ptr->cbl = top - fn + 2 + S_HDRSIZE;
	*clb_ptr->mbf = CMMS_S_INITREG;
	ptr = clb_ptr->mbf + 1;
	temp_short = top - fn;
	CM_PUT_SHORT(ptr, temp_short, li->convert_byteorder);
	ptr += SIZEOF(short);
	memcpy(ptr, fn, top - fn);
	status = cmi_write(clb_ptr);
	if (CMI_ERROR(status))
	{
		if (new)
			gvcmy_close(clb_ptr);
		rts_error(VARLSTCNT(3) ERR_NETDBOPNERR, 0, status);
	}
	status = cmi_read(clb_ptr);
	if (CMI_ERROR(status))
	{
		if (new)
			gvcmy_close(clb_ptr);
		rts_error(VARLSTCNT(3) ERR_NETDBOPNERR, 0, status);
	}
	if (CMMS_T_REGNUM != *clb_ptr->mbf)
	{
		if (CMMS_E_ERROR != *clb_ptr->mbf)
		{
			if (new)
				gvcmy_close(clb_ptr);
			rts_error(VARLSTCNT(3) ERR_NETDBOPNERR, 0, ERR_BADSRVRNETMSG);
		}
		gvcmz_errmsg(clb_ptr, new);
	}
	ptr = clb_ptr->mbf + 1;
	reg->cmx_regnum = *ptr++;
	reg->null_subs = *ptr++;
	CM_GET_SHORT(reg->max_rec_size, ptr, li->convert_byteorder);
	ptr += SIZEOF(short);
	if (reg->max_rec_size + CM_BUFFER_OVERHEAD > li->buffer_size)
	{
		if (li->buffered_count)
		{
			assert(li->buffer);
			libuff = malloc(reg->max_rec_size);
			memcpy(libuff, li->buffer, li->buffer_used);
			free(li->buffer);
			li->buffer = libuff;
		} else if (li->buffer)
		{
			free(li->buffer);
			li->buffer = 0;
		}
		li->buffer_size = reg->max_rec_size + CM_BUFFER_OVERHEAD;
	}
	CM_GET_SHORT(reg->max_key_size, ptr, li->convert_byteorder);
	ptr += SIZEOF(short);
	reg->std_null_coll = (li->server_supports_std_null_coll) ? *ptr++ : 0;
		/* From level 210 (GT.M V5), server will send null subscript collation info into CMMS_S_INITREG message */
	reg->dyn.addr->cm_blk = clb_ptr;
	reg->dyn.addr->acc_meth = dba_cm;
	reg->open = TRUE;
	clb_ptr->mbl = li->buffer_size;
	if (clb_ptr->mbl < CM_MINBUFSIZE)
		clb_ptr->mbl = CM_MINBUFSIZE;
	REVERT;
	return;
}