WvResolver - Background DNS name resolution

	  
/*
 * A WvResolver example.
 *
 * Tries to look up two host names given on the command line.
 * The expected output:
 * resolver<Err>: 1 not in DNS.
 * resolver<Err>: 2 not in DNS.
 * resolver<Err>: 1 not in DNS.
 * resolver<Err>: 2 not in DNS.
 * resolver<Err>: 1 not in DNS.
 * resolver<Err>: 2 not in DNS.
 *
 */

#include "wvresolver.h"
#include "wvlog.h"

void test(WvResolver &dns, int argc, char **argv)
{
    WvLog log("resolver", WvLog::Info);
    const WvIPAddr *addr;
    int res1, res2;

    res1 = res2 = -1;

    while (res1 < 0 || res2 < 0)
    {
	if (res1 < 0)
	{
	    res1 = dns.findaddr(100, argc > 1 ? argv[1] : "abyss.cnss.ca",
				&addr);
	    if (res1 > 0)
		log.print("Found address for 1: %s\n", (WvString)(*addr));
	    else if (res1 < 0)
		log.print("[1] ");
	    else
		log(WvLog::Error, "1 not in DNS.\n");
	}

	if (res2 < 0)
	{
	    res2 = dns.findaddr(100, argc > 2 ? argv[2] : "frank.foxnet.net",
			       &addr);
	    if (res2 > 0)
		log.print("Found address for 2: %s\n", (WvString)(*addr));
	    else if (res2 < 0)
		log.print("[2] ");
	    else
		log(WvLog::Error, "2 not in DNS.\n");
	}
    }

}

int main(int argc, char **argv)
{
    {
	WvResolver dns;
	test(dns, argc, argv);
	test(dns, argc, argv);
    }

    {
	WvResolver dns;
	test(dns, argc, argv);
    }

    return 0;
}