ReadRules.c
Author: cmaier@cmassoc.net

    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   signed ReadRules (struct plc * plc);
     *
     *   plc.h
     *
     *   Read and Display the classifier rules read from a PLC device.
     *
     *   Contributor(s):
     *      Nathan Houghton <nhoughto@qca.qualcomm.com>
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    #ifndef READRULES_SOURCE
    #define READRULES_SOURCE

    #include <limits.h>
    #include <stdio.h>

    #include "../plc/plc.h"
    #include "../plc/rules.h"
    #include "../tools/error.h"

    signed ReadRules (struct plc * plc)

    {
    	struct channel * channel = (struct channel *) (plc->channel);
    	struct message * message = (struct message *) (plc->message);

    #ifndef __GNUC__
    #pragma pack (push,1)
    #endif

    	struct __packed vs_classification_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MCONTROL;
    		uint8_t RSVD;
    		uint8_t OFFSET;
    		uint8_t COUNT;
    	}
    	* request = (struct vs_classification_request *) (message);
    	struct __packed vs_classification_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t TOTAL_CLASSIFIERS;
    		uint8_t OFFSET;
    		uint8_t COUNT;
    		struct __packed MMEReadRule
    		{
    			uint8_t MACTION;
    			uint8_t MOPERAND;
    			uint8_t NUM_CLASSIFIERS;
    			struct MMEClassifier CLASSIFIER [3];
    			struct cspec cspec;
    		}
    		RULESET [60];
    	}
    	* confirm = (struct vs_classification_confirm *) (message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	unsigned index = 0;
    	unsigned total = UINT_MAX;
    	Request (plc, "Read Classifier Rules");
    	while (index < total)
    	{
    		struct MMEReadRule * rule;
    		memset (message, 0, sizeof (* message));
    		EthernetHeader (& request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (& request->qualcomm, 0, (VS_CLASSIFICATION | MMTYPE_REQ));
    		plc->packetsize = ETHER_MIN_LEN - ETHER_CRC_LEN;
    		request->MCONTROL = CONTROL_READ;
    		request->OFFSET = index;
    		request->COUNT = SIZEOF (confirm->RULESET);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 0, (VS_CLASSIFICATION | MMTYPE_CNF)) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (confirm->MSTATUS)
    		{
    			Failure (plc, PLC_WONTDOIT);
    			return (-1);
    		}
    		total = confirm->TOTAL_CLASSIFIERS;
    		index += confirm->COUNT;
    		rule = confirm->RULESET;
    		while (confirm->COUNT--)
    		{
    			int count;
    			int rule_len;
    			const char * p1;
    			const char * p2;
    			struct cspec * cspec;
    			if (rule->NUM_CLASSIFIERS > RULE_MAX_CLASSIFIERS)
    			{
    				error (1, 0, "too many classifiers in rule (%d, expecting <= %d)", rule->NUM_CLASSIFIERS, RULE_MAX_CLASSIFIERS);
    			}
    			rule_len = sizeof (* rule) - (RULE_MAX_CLASSIFIERS - rule->NUM_CLASSIFIERS) * sizeof (struct MMEClassifier) - sizeof (struct cspec);
    			if (rule->MACTION == ACTION_AUTOCONNECT || rule->MACTION == ACTION_TAGTX || rule->MACTION == ACTION_TAGRX)
    			{
    				cspec = (struct cspec *) ((uint8_t *) rule +  rule_len);
    				rule_len += sizeof (struct cspec);
    			}
    			if (rule->MACTION == ACTION_TAGTX)
    			{
    				printf ("-T 0x%08X -V %d ", ntohl (cspec->VLAN_TAG), cspec->CSPEC_VERSION);
    			}
    			p1 = reword (rule->MACTION, actions, CLASSIFIER_ACTIONS);
    			if (p1 == NULL)
    			{
    				error (1, 0, "invalid classifier action");
    			}
    			p2 = reword (rule->MOPERAND, operands, CLASSIFIER_OPERANDS);
    			if (p2 == NULL)
    			{
    				error (1, 0, "invalid classifier operand");
    			}
    			printf ("%s", p1);
    			printf (" %s ", p2);

    /* need to dump out the actual conditions here */

    			for (count = 0; count < rule->NUM_CLASSIFIERS; ++ count)
    			{
    				struct MMEClassifier * classifier = & rule->CLASSIFIER [count];
    				PrintRule (classifier->CR_PID, classifier->CR_OPERAND, classifier->CR_VALUE);
    				putchar (' ');
    			}
    			printf ("add temp\n");
    			rule = (struct MMEReadRule *) ((uint8_t *) (rule) +  rule_len);
    		}
    	}
    	return (0);
    }

    #endif

[PREV] [HOME] [NEXT]