/* BEGIN_ICS_COPYRIGHT2 ****************************************

Copyright (c) 2015-2017, Intel Corporation

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    * Redistributions of source code must retain the above copyright notice,

      this list of conditions and the following disclaimer.

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** END_ICS_COPYRIGHT2   ****************************************/

/* [ICS VERSION STRING: unknown] */

#include <poll.h>

#include <errno.h>

#include <string.h> /* strerror() */

#define OPAMGT_PRIVATE 1

#include "ib_utils_openib.h"

#include "opamgt_dump_mad.h"

#include "omgt_oob_net.h"

#include "omgt_oob_protocol.h"

#include <opamgt.h>

#include <opamgt_sa.h>

#include <opamgt_sa_notice.h>

#include <iba/stl_sa_priv.h>

/**===========================================================================*/

omgt_sa_registration_t* omgt_sa_find_reg(struct omgt_port *port, uint16_t trap_num)

{

	omgt_sa_registration_t *curr = port->regs_list;

	while (curr != NULL) {

		if (curr->trap_num == trap_num) {

			return curr;

		}

		curr = curr->next;

	}

	return NULL;

}

/**===========================================================================*/

OMGT_STATUS_T omgt_sa_register_trap(struct omgt_port *port, uint16_t trap_num,

	void *context)

{

	OMGT_STATUS_T status;

	int ret;

	omgt_sa_registration_t *reg;

	if (port->is_oob_enabled) {

		OMGT_OUTPUT_ERROR(port, "Port in Out-of-Band Mode, Trap registration not Supported\n");

		return OMGT_STATUS_INVALID_STATE;

	}

	reg = (omgt_sa_registration_t *)calloc(1, sizeof*reg);

	if (reg == NULL) {

		OMGT_OUTPUT_ERROR(port, "failed to allocate reg structure\n");

		return OMGT_STATUS_ERROR;

	}

	status = FTIMEOUT;

	if (omgt_lock_sem(&port->lock)) {

		OMGT_OUTPUT_ERROR(port, "failed to acquire lock (status: %d)\n", status);

		free(reg);

		return OMGT_STATUS_ERROR;

	}

	if (omgt_sa_find_reg(port, trap_num)) {

		omgt_unlock_sem(&port->lock);

		free(reg);

		return OMGT_STATUS_SUCCESS;

	}

	if ((ret = create_sa_qp(port)) != 0) {

		omgt_unlock_sem(&port->lock);

		OMGT_OUTPUT_ERROR(port, "failed to create notice QP for trap (%u) registration (status: %d)\n",

			trap_num, ret);

	} else if ((ret = userspace_register(port, trap_num, reg)) != 0) {

		omgt_unlock_sem(&port->lock);

		OMGT_OUTPUT_ERROR(port, "failed to register for trap (%u) (status: %d)\n",

			trap_num, ret);

	}

	if (ret) {

		free(reg);

		return OMGT_STATUS_ERROR;

	}

	reg->user_context = context;

	reg->trap_num = trap_num;

	omgt_sa_add_reg_unsafe(port, reg);

	omgt_unlock_sem(&port->lock);

	return OMGT_STATUS_SUCCESS;

}

/**===========================================================================*/

OMGT_STATUS_T omgt_sa_unregister_trap(struct omgt_port *port, uint16_t trap_num)

{

	OMGT_STATUS_T status;

	if (port->is_oob_enabled) {

		OMGT_OUTPUT_ERROR(port, "Port in Out-of-Band Mode, Trap (un)registration not Supported\n");

		return OMGT_STATUS_INVALID_STATE;

	}

	if (omgt_lock_sem(&port->lock))

		return OMGT_STATUS_ERROR;

	status = omgt_sa_remove_reg_by_trap_unsafe(port, trap_num);

	omgt_unlock_sem(&port->lock);

	return status;

}

/**===========================================================================*/

OMGT_STATUS_T omgt_sa_get_notice_report(struct omgt_port *port, STL_NOTICE **notice,

	size_t *notice_len, void **context, int poll_timeout_ms)

{

	int rc;

	int bytes_read;

	struct pollfd pollfd[1];

	uint8_t rcv_buf[2048];

	struct omgt_thread_msg *msg;

	STL_NOTICE *notice_buf = NULL;

	omgt_sa_registration_t *reg;

	uint16_t trap_num;

	if (port->is_oob_enabled) {

		uint32_t oob_recv_len = 0;

		OOB_PACKET *packet = NULL;

		if (!port->is_oob_notice_setup) {

			OMGT_STATUS_T status;

			if ((status = omgt_oob_net_connect(port, &port->notice_conn)) != FSUCCESS) {

				OMGT_OUTPUT_ERROR(port, "failed to establish a connection to the host: %u\n", status);

				return status;

			}

			port->is_oob_notice_setup = TRUE;

		}

		do {

			/* Process IP 'blobs' (TCP Segments) */

			omgt_oob_net_process(port, port->notice_conn, poll_timeout_ms, 1);

			/* If failure return error */

			if (port->notice_conn->err) {

				return OMGT_STATUS_ERROR;

			}

		} while (port->notice_conn->blob_in_progress);

		/* Check if we are done getting all the 'blobs' */

		omgt_oob_net_get_next_message(port->notice_conn, (uint8_t **)&packet, (int *)&oob_recv_len);

		/* Handle Timeout Case */

		if (packet == NULL) {

			return OMGT_STATUS_TIMEOUT;

		}

		/* Handle packet */

		oob_recv_len = 0;

		BSWAP_OOB_HEADER(&(packet->Header));

		oob_recv_len = packet->Header.Length;

		BSWAP_MAD_HEADER((MAD *)&packet->MadData.common);

		/* Handle Trap/Notice Report */

		if (packet->MadData.common.AttributeID == STL_MCLASS_ATTRIB_ID_NOTICE) {

			/* Remove Header Bytes */

			oob_recv_len -= (sizeof(MAD_COMMON) - sizeof(RMPP_HEADER) - sizeof(SA_HDR));

			/* Allocate the Notice */

			notice_buf = (STL_NOTICE *)calloc(1, oob_recv_len);

			if (notice_buf == NULL) {

				OMGT_OUTPUT_ERROR(port, "failed to allocate notice buffer\n");

				return OMGT_STATUS_INSUFFICIENT_MEMORY;

			}

			/* Copy and allocate the Data */

			SA_MAD *samad = (SA_MAD *)&packet->MadData.common;

			memcpy(notice_buf, samad->Data, oob_recv_len);

			BSWAP_STL_NOTICE(notice_buf);

			trap_num = notice_buf->Attributes.Generic.TrapNumber;

			OMGT_DBGPRINT(port, "trap message %u: %d bytes\n", trap_num, oob_recv_len);

			/* Find Context (Not in OOB) */

			if (context) {

				*context = NULL;

			}

			/* Set Notice struct and length */

			*notice = notice_buf;

			*notice_len = oob_recv_len;

			return OMGT_STATUS_SUCCESS;

		/* Handle Inform Info */

		} else if (packet->MadData.common.AttributeID == STL_MCLASS_ATTRIB_ID_INFORM_INFO) {

			SA_MAD *samad = (SA_MAD *)&packet->MadData.common;

			STL_INFORM_INFO *informinfo = (STL_INFORM_INFO *)samad->Data;

			trap_num = ntoh16(informinfo->u.Generic.TrapNumber);

			/* Free Packet */

			free(packet);

			OMGT_OUTPUT_ERROR(port, "Registration of Trap message timed out: Trap %u\n", trap_num);

			return OMGT_STATUS_DISCONNECT;

		/* Otherwise error */

		} else {

			SA_MAD *samad = (SA_MAD *)&packet->MadData.common;

			OMGT_OUTPUT_ERROR(port, "Unexpected OOB MAD recieved: %s %s(%s)\n",

				stl_class_str(samad->common.BaseVersion, samad->common.MgmtClass),

				stl_method_str(samad->common.BaseVersion, samad->common.MgmtClass, samad->common.mr.AsReg8),

				stl_attribute_str(samad->common.BaseVersion, samad->common.MgmtClass, hton16(samad->common.AttributeID)));

			/* Free Packet */

			free(packet);

			return OMGT_STATUS_ERROR;

		}

	}

	pollfd[0].fd = port->umad_port_sv[0];

	pollfd[0].events = POLLIN;

	pollfd[0].revents = 0;

	/* Poll for event */

	if ((rc = poll(pollfd, 1, poll_timeout_ms)) < 0) {

		OMGT_OUTPUT_ERROR(port, "trap poll failed : %s\n", strerror(errno));

		return FERROR;

	} else if (rc == 0) {

		/* Handle Timeout Case */

		return OMGT_STATUS_TIMEOUT;

	} else if (pollfd[0].revents & POLLIN) {

		/* Read from Stream */

		bytes_read = read(port->umad_port_sv[0], rcv_buf, sizeof(rcv_buf));

		if (bytes_read <= 0) {

			OMGT_OUTPUT_ERROR(port, "user event read failed : %s\n", strerror(errno));

			return OMGT_STATUS_ERROR;

		}

		/* Determine Message Type */

		msg = (struct omgt_thread_msg *)rcv_buf;

		if (OMGT_TH_EVT_TRAP_MSG == msg->evt) {

			int bufSize = MIN(msg->size,sizeof(rcv_buf)-sizeof(*msg));

			/* Thread Event Type : Trap Message */

			/* Allocate the Notice */

			notice_buf = (STL_NOTICE *)calloc(1, bufSize);

			if (notice_buf == NULL) {

				OMGT_OUTPUT_ERROR(port, "failed to allocate notice buffer\n");

				return OMGT_STATUS_INSUFFICIENT_MEMORY;

			}

			/* Copy and allocate the Data */

			memcpy(notice_buf, rcv_buf + sizeof(*msg), bufSize);

			BSWAP_STL_NOTICE(notice_buf);

			trap_num = notice_buf->Attributes.Generic.TrapNumber;

			OMGT_DBGPRINT(port, "trap message %u: %d bytes\n", trap_num, (int)(msg->size));

			/* Find Context */

			if (context) {

				reg = omgt_sa_find_reg(port, trap_num);

				if (reg == NULL) {

					OMGT_OUTPUT_ERROR(port, "failed to retrieve registration: trap %u\n", trap_num);

					*context = NULL;

				} else {

					/* Set context */

					*context = reg->user_context;

				}

			}

			/* Set Notice struct and length */

			*notice = notice_buf;

			*notice_len = msg->size;

			return OMGT_STATUS_SUCCESS;

		} else if (OMGT_TH_EVT_TRAP_REG_ERR_TIMEOUT == msg->evt) {

			/* Thread Event Type : Registration Timeout */

			STL_INFORM_INFO *informinfo = (STL_INFORM_INFO *)msg->data;

			trap_num = ntoh16(informinfo->u.Generic.TrapNumber);

			OMGT_OUTPUT_ERROR(port, "Registration of Trap message timed out: Trap %u\n", trap_num);

			return OMGT_STATUS_DISCONNECT;

		} else {

			OMGT_OUTPUT_ERROR(port, "user event read invalid message: %u\n", msg->evt);

			return OMGT_STATUS_ERROR;

		}

	} else {

		OMGT_OUTPUT_ERROR(port, "trap poll unexpected result : %d\n", pollfd[0].revents);

		return OMGT_STATUS_ERROR;

	}

	return OMGT_STATUS_SUCCESS;

}