[Winpcap-users] WinPCAP packets capture delay..

[Gianluca Varenni]

Alimjan,

what is the result that you get with this test? 

GV


From: Alimjan Kuramshin 
Sent: Saturday, September 18, 2010 2:32 PM
To: winpcap-users at winpcap.org 
Subject: [Winpcap-users] WinPCAP packets capture delay..


Hello! 


Gianluca, can u run this code on Your machine and running the Wireshark save the log and send it to me, please..
Is there any delays, i mean delays between the packets that Wireshark (winpcap) capture?


P.S. code from WinPcap documentation, sending packets, not one, but 10000 (or 1000000)..


#include <stdlib.h>
#include <stdio.h>

#include <pcap.h>


void main(int argc, char **argv)
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
u_char packet[100];
int i;volatile int n_pkts = 10000; // 1000000

    /* Check the validity of the command line */
    if (argc != 2)
    {
        printf("usage: %s interface (e.g. 'rpcap://eth0')", argv[0]);
        return;
    }
    
    /* Open the output device */
    if ( (fp= pcap_open(argv[1],            // name of the device
                        65536,                // portion of the packet to capture (only the first 100 bytes)
                        PCAP_OPENFLAG_PROMISCUOUS,  // promiscuous mode
                        1000,               // read timeout
                        NULL,               // authentication on the remote machine
                        errbuf              // error buffer
                        ) ) == NULL)
    {
        fprintf(stderr,"\nUnable to open the adapter. %s is not supported by WinPcap\n", argv[1]);
        return;
    }

    /* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
    packet[0]=1;
    packet[1]=1;
    packet[2]=1;
    packet[3]=1;
    packet[4]=1;
    packet[5]=1;
    
    /* set mac source to 2:2:2:2:2:2 */
    packet[6]=2;
    packet[7]=2;
    packet[8]=2;
    packet[9]=2;
    packet[10]=2;
    packet[11]=2;
    
    /* Fill the rest of the packet */
    for(i=12;i<100;i++)
    {
        packet[i]=(u_char)i;
    }
    while (n_pkts--)
    /* Send down the packet */
    if (pcap_sendpacket(fp, packet, 100 /* size */) != 0)
    {
        fprintf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
        return;
    }

    return;
}
/* EOF */Thanks, bye..



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