#include "oemhandler.h"
#include <host-ipmid/ipmid-api.h>
#include <stdio.h>
#include <string.h>

void register_netfn_oem_partial_esel() __attribute__((constructor));

const char *g_esel_path = "/tmp/esel";
uint16_t g_record_id = 0x0001;


///////////////////////////////////////////////////////////////////////////////
// For the First partial add eSEL the SEL Record ID and offset
// value should be 0x0000. The extended data needs to be in
// the form of an IPMI SEL Event Record, with Event sensor type
// of 0xDF and Event Message format of 0x04. The returned
// Record ID should be used for all partial eSEL adds.
//
// This function creates a /tmp/esel file to store the
// incoming partial esel.  It is the role of some other
// function to commit the error log in to long term
// storage.  Likely via the ipmi add_sel command.
///////////////////////////////////////////////////////////////////////////////
ipmi_ret_t ipmi_ibm_oem_partial_esel(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                                     ipmi_request_t request, ipmi_response_t response,
                                     ipmi_data_len_t data_len, ipmi_context_t context)
{
	esel_request_t *reqptr = (esel_request_t*) request;
	FILE *fp;
	// TODO: Issue 5: This is not endian-safe.
	short *recid  =  (short*) &reqptr->selrecordls;
	short *offset =  (short*) &reqptr->offsetls;
	uint8_t rlen;
	ipmi_ret_t rc = IPMI_CC_OK;
	const char *pio;

	// OpenPOWER Host Interface spec says if RecordID and Offset are
	// 0 then then this is a new request
	if (!*recid && !*offset)
		pio = "wb";
	else
		pio = "rb+";

	rlen = (*data_len) - (uint8_t) (sizeof(esel_request_t));

	printf("IPMI PARTIAL ESEL for %s  Offset = %d Length = %d\n",
		g_esel_path, *offset, rlen);

	if ((fp = fopen(g_esel_path, pio)) != NULL) {
		fseek(fp, *offset, SEEK_SET);
		fwrite(reqptr+1,rlen,1,fp);
		fclose(fp);

		*data_len = sizeof(g_record_id);
		memcpy(response, &g_record_id, *data_len);
	} else {
		fprintf(stderr, "Error trying to perform %s for esel%s\n",pio, g_esel_path);
		rc = IPMI_CC_INVALID;
		*data_len     = 0;
	}

	// The first bit prepresents that this is the last partial packet
	// coming down.  If that is the case advance the record id so we
	// don't overlap logs.  This allows anyone to establish a log
	// directory system.
	if (reqptr->progress & 1 ) {
		g_record_id++;
	}

	return rc;
}


void register_netfn_oem_partial_esel()
{
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_OEM, IPMI_CMD_PESEL);
	ipmi_register_callback(NETFUN_OEM, IPMI_CMD_PESEL, NULL, ipmi_ibm_oem_partial_esel);
	return;
}