/*      $OpenBSD: getnameinfo.c,v 1.2 2018/12/15 15:16:12 eric Exp $    */
/*
 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "common.h"

static void
usage(void)
{
        extern const char * __progname;

        fprintf(stderr, "usage: %s [-DFHNSe] [-p portno] <addr...>\n", __progname);
        exit(1);
}

int
main(int argc, char *argv[])
{
        char                     serv[1024];
        char                     host[1024];
        const char               *e;
        int                      i, ch, flags = 0, port = 0;
        struct sockaddr_storage  ss;
        struct sockaddr         *sa;

        sa = (struct sockaddr*)&ss;

        while((ch = getopt(argc, argv, "DFHNR:Saep:")) !=  -1) {
                switch(ch) {
                case 'D':
                        flags |= NI_DGRAM;
                        break;
                case 'F':
                        flags |= NI_NOFQDN;
                        break;
                case 'H':
                        flags |= NI_NUMERICHOST;
                        break;
                case 'N':
                        flags |= NI_NAMEREQD;
                        break;
                case 'R':
                        parseresopt(optarg);
                        break;
                case 'S':
                        flags |= NI_NUMERICSERV;
                        break;
                case 'e':
                        long_err += 1;
                        break;
                case 'p':
                        port = strtonum(optarg, 0, 65535, &e);
                        if (e)
                                usage();
                        break;
                default:
                        usage();
                        /* NOTREACHED */
                }
        }
        argc -= optind;
        argv += optind;

        for(i = 0; i < argc; i++) {

                if (i)
                        printf("\n");
                printf("===> \"%s\"\n", argv[i]);

                if (sockaddr_from_str(sa, AF_UNSPEC, argv[i]) == -1) {
                        printf("   => invalid address\n");
                        continue;
                }

                if (sa->sa_family == PF_INET)
                        ((struct sockaddr_in *)sa)->sin_port = htons(port);
                else if (sa->sa_family == PF_INET6)
                        ((struct sockaddr_in6 *)sa)->sin6_port = htons(port);

                errno = 0;
                h_errno = 0;
                gai_errno = 0;
                rrset_errno = 0;

                gai_errno = getnameinfo(sa, sa->sa_len, host, sizeof host, serv,
                    sizeof serv, flags);

                if (gai_errno == 0)
                        printf("   %s:%s\n", host, serv);
                print_errors();

        }

        return (0);
}