/*      $OpenBSD: getaddrinfo.c,v 1.3 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 <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>

#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <netdb.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 [-CHSPe] [-f family] [-p proto] "
                "[-s servname]\n        [-t socktype] <host...>\n", __progname);
        exit(1);
}

int
main(int argc, char *argv[])
{
        struct addrinfo         *ai, *res, hints;
        char                    *servname = NULL, *host;
        int                      i, ch;

        memset(&hints, 0, sizeof hints);

        while((ch = getopt(argc, argv, "CFHPR:Sef:p:s:t:")) !=  -1) {
                switch(ch) {
                case 'C':
                        hints.ai_flags |= AI_CANONNAME;
                        break;
                case 'F':
                        hints.ai_flags |= AI_FQDN;
                        break;
                case 'H':
                        hints.ai_flags |= AI_NUMERICHOST;
                        break;
                case 'P':
                        hints.ai_flags |= AI_PASSIVE;
                        break;
                case 'R':
                        parseresopt(optarg);
                        break;
                case 'S':
                        hints.ai_flags |= AI_NUMERICSERV;
                        break;
                case 'e':
                        long_err += 1;
                        break;
                case 'f':
                        if (!strcmp(optarg, "inet"))
                                hints.ai_family = AF_INET;
                        else if (!strcmp(optarg, "inet6"))
                                hints.ai_family = AF_INET6;
                        else
                                usage();
                        break;
                case 'p':
                        if (!strcmp(optarg, "udp"))
                                hints.ai_protocol = IPPROTO_UDP;
                        else if (!strcmp(optarg, "tcp"))
                                hints.ai_protocol = IPPROTO_TCP;
                        else if (!strcmp(optarg, "icmp"))
                                hints.ai_protocol = IPPROTO_ICMP;
                        else if (!strcmp(optarg, "icmpv6"))
                                hints.ai_protocol = IPPROTO_ICMPV6;
                        else
                                usage();
                        break;
                case 's':
                        servname = optarg;
                        break;
                case 't':
                        if (!strcmp(optarg, "stream"))
                                hints.ai_socktype = SOCK_STREAM;
                        else if (!strcmp(optarg, "dgram"))
                                hints.ai_socktype = SOCK_DGRAM;
                        else if (!strcmp(optarg, "raw"))
                                hints.ai_socktype = SOCK_RAW;
                        else
                                usage();
                        break;
                default:
                        usage();
                        /* NOTREACHED */
                }
        }
        argc -= optind;
        argv += optind;

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

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

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

                gai_errno = getaddrinfo(host, servname, &hints, &ai);

                print_errors();
                if (gai_errno == 0) {
                        for (res = ai; res; res = res->ai_next)
                                print_addrinfo(res);
                        freeaddrinfo(ai);
                }
        }

        return (0);
}