utilities.c

Vxworks下的C例子程序

 /*******************************************************************************
 *
 *  THIS CODE IS NOT SUPPORTED CODE.  IT IS PROVIDED ON AN AS-IS BASIS.
 *
 *******************************************************************************/
 
#include "vxWorks.h"
#include "ifLib.h"
#include "etherLib.h"
#include "stdio.h"
#include "net/if.h"
#include "net/unixLib.h"
#include "netBufLib.h"
#include "end.h"
#include "muxLib.h"
#include "netShow.h"
#include "stdio.h"


IMPORT struct ifqueue ipintrq;
IMPORT struct ifqueue arpintrq;

IMPORT void netPoolShow (NET_POOL_ID pNetPool);

/******************************************************************************
*
* changeProtocolInputQMax - Change IP and ARP input queue maximum length
*                       Default configuration sets these values to 50 packets each.
* 
*/
void changeProtocolInputQMax
    (
    int ipQNewSize,   /* Default is 50 */
    int arpQNewSize   /* Default is 50 */
    )
    {
    int s;
   
    printf("IP input maximum queue length = %d\n", ipintrq.ifq_maxlen);
    printf("Arp input maximum queue length = %d\n", arpintrq.ifq_maxlen);
    
    s = splnet();
    arpintrq.ifq_maxlen = arpQNewSize;
    ipintrq.ifq_maxlen = ipQNewSize;
    splx(s);

    printf("New IP input maximum queue length = %d\n", ipintrq.ifq_maxlen);
    printf("New Arp input maximum queue length = %d\n", arpintrq.ifq_maxlen);

    return;

    }


void protocolQValuesShow (void)
    {
   
    printf("IP receive queue max size = %d\n", ipintrq.ifq_maxlen);
    printf("IP receive queue drops = %d\n\n", ipintrq.ifq_drops);
    printf("ARP receive queue max size = %d\n", arpintrq.ifq_maxlen);
    printf("ARP receive queue drops = %d\n", arpintrq.ifq_drops);


    return;

    }


/******************************************************************************
*
* ifQValuesShow - Show number of times packets were dropped because interface send
*                was full.
*
* name
*     Expects the interface name plus the unit number: dc0, fei0 
* 
*/

void ifQValuesShow
    (
    char *name
    )
    {

    struct ifnet *ifp;

    ifp = ifunit(name);

    if (ifp == NULL)
        {
        printf("Could not find %s interface\n", name);
        return;
        }
    printf("%s drops = %d queue length = %d max_len = %d \n", name, ifp->if_snd.ifq_drops,
            ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen);
    return;
    }


/******************************************************************************
*
* changeIfSendQMax - Change interface send queue length.
*
* name expects the interface name plus the unit number: dc0, fei0 
*
* len:  New length.   Default configuration sets this value to 50.
*
*/

void changeIfSendQMax
    (
    char *name,
    int len
    )
    {

    struct ifnet *ifp;
    int s;

    ifp = ifunit(name);

    if (ifp == NULL)
        {
        printf("Could not find %s interface\n", name);
        return;
        }

    printf("%s previous queue length was %d\n", name, ifp->if_snd.ifq_maxlen);
    s = splnet();
    ifp->if_snd.ifq_maxlen = len;
    splx(s);
    printf("Queue length set at: %d\n", ifp->if_snd.ifq_maxlen);
    return;
    }



/******************************************************************************
*
* endMibShow - Show the contents of the MIB2 table for end drivers.
*
* Output errors can be errors while transmitting or dropped packets due to
* driver's out of buffers error condition.  Input errors can be packets received
* with errors or packets dropped due to driver's out of buffers error condition.
* See endPoolShow below. 
* 
*/
void endMibShow
    (
    char * devName,
    int unit
    )
    {

    END_OBJ * pEnd;

    if ((pEnd = endFindByName (devName, unit)) == NULL)
        {
        printf ("Could not find device %s\n", devName);
        return;
        }

    printf("Mib table statistics for %s%d:\n", devName, unit);
    printf("Output errors = %lu   ", pEnd->mib2Tbl.ifOutErrors);
    printf("Output Packets = %lu\n", pEnd->mib2Tbl.ifOutUcastPkts);
    printf("Input errors = %lu\n", pEnd->mib2Tbl.ifInErrors);
    printf("Unknown protocols = %lu\n", pEnd->mib2Tbl.ifInUnknownProtos);

    return;

    }

/******************************************************************************
*
* endPoolShow - Show the status of the private memory pool for end drivers.
*
* The total number of clusters is usually equal to the sum of the number of transmit,
* receive and loan buffer descriptors that a driver is initialized with.
* See the External Interface section for the driver's library description in the
* vxWorks Reference manual (i.e dec21x40End), the driver's header file, and configNet.h
* for the default values.
*
* If the number of free buffers is 0, the device will be unable to either transmit 
* (Mib 2 output errors will increase)  or receive packets (The Mib table input errors
*  statistics will increase).
*
* Why would the free pool drop to 0?  Most common reason is task not reading a socket.
* Drivers lend buffers to the stack which are not freed until the socket is read.
*
*/

void endPoolShow
    (
    char * devName,  /* The inteface name: "dc", "ln" ...*/
    int unit         /* the unit number: usually 0 */
    )
    {
    END_OBJ * pEnd;

    if ((pEnd = endFindByName (devName, unit)) != NULL)
        netPoolShow (pEnd->pNetPool);
    else
        printf ("Could not find device %s\n", devName);
    return;
    }


/******************************************************************************
*
* changeMtu - Change default interface MTU.
* 
*/
void changeMtu
    (
    char *ifName,
    int newSize
    )
    {
    struct ifnet *ifp;
    int s;

    ifp = ifunit(ifName);

    if (ifp == NULL)
        {
        printf("Could not find %s interface\n", ifName);
        return;
        }

    printf("Previous MTU for %s was %d\n", ifName, ifp->if_mtu);
    s = splnet();
    ifp->if_mtu = newSize;
    splx(s);
    printf("MTU is now set at: %d\n", ifp->if_mtu);
    return;
    }