How do you install NPCap library into Visual Studio

Question

I am trying to install the NPCap library into Visual Studio so I can run this code from the documentation.

#include "pcap.h"

main()
{
pcap_if_t* alldevs;
pcap_if_t* d;
int i = 0;
char errbuf[PCAP_ERRBUF_SIZE];

/* Retrieve the device list from the local machine */
if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL /* auth is not needed */, &alldevs, errbuf) == -1)
{
    fprintf(stderr, "Error in pcap_findalldevs_ex: %s\n", errbuf);
    exit(1);
}

/* Print the list */
for (d = alldevs; d != NULL; d = d->next)
{
    printf("%d. %s", ++i, d->name);
    if (d->description)
        printf(" (%s)\n", d->description);
    else
        printf(" (No description available)\n");
}

if (i == 0)
{
    printf("\nNo interfaces found! Make sure Npcap is installed.\n");
    return;
}

/* We don't need any more the device list. Free it */
pcap_freealldevs(alldevs);

} When I run this code I get many errors, one of which is "cannot open source file "pcap/pcap.h". The other errors state that the variables are undefined. I believe I have not installed the library correctly.

I have both the .lib files and the .h files in the same directory in my desktop, as can be seen in this screenshot.

I have also changed the directories in Visual Studio to the appropriate folder.

As per the instructions found in: How to add additional libraries to Visual Studio project?

Probably either OneDrive or copying all the files to a single directory. — S.S. Anne, Jan 23 '20 at 12:31

score 0 · Answer 1 · answered Jan 24 '20 at 06:39

From the error

"cannot open source file "pcap/pcap.h"

it looks like it is expecting a directory structure. Directory named "pcap" with all the header files in it.

Can you confirm you added this folder path in Library Directory as well. Link for reference.

How do you install NPCap library into Visual Studio

1 Answers1