Simple program to test getaddrinfo()

addrtest.c (text/plain), 988 bytes, created by Fredrik Tolf on 2005-03-22 14:45:19 UTC

#include <string.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netdb.h>
#include <assert.h>

int main(int argc, char **argv)
{
    int i;
    struct addrinfo *res, *c;
    struct addrinfo hint;
    char *node, *serv;
    int ret;
    
    memset(&hint, 0, sizeof(hint));
    hint.ai_flags = AI_CANONNAME;
    node = serv = NULL;
    if(argc > 1)
	node = argv[1];
    if(argc > 2)
	serv = argv[2];
    if(ret = getaddrinfo(node, serv, &hint, &res))
    {
	fputs(gai_strerror(ret), stderr);
	fputc('\n', stderr);
	return(1);
    }
    for(c = res; c != NULL; c = c->ai_next)
    {
	printf("%x %i %i %i %s\n", c->ai_flags, c->ai_family, c->ai_socktype, c->ai_protocol, c->ai_canonname);
	for(i = 0; i < c->ai_addrlen; i++)
	{
	    printf("%02x ", (int)(((unsigned char *)c->ai_addr)[i]));
	    if(i & 0xf == 0)
		printf("\n");
	}
	printf("\n\n");
    }
    freeaddrinfo(res);
    return(0);
}

/*
 * Local Variables:
 * compile-command: "gcc -g -o addrtest addrtest.c"
 * End:
 */