whois.c

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/*
 * Copyright (c) 1980, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * 8/1/97 - Ted Felix <tfelix@fred.net>
 *          Ported to Win32 from 4.4-BSDLITE2 from wcarchive.
 *          Added WSAStartup()/WSACleanup() and switched from the
 *          more convenient fdopen()/fprintf() to send()/recv().
 */
 
//#include <sys/types.h>
#define WIN32_NO_STATUS
#include <windef.h>
#define _INC_WINDOWS
#include <winsock2.h>
/* #include <sys/socket.h> */
/* #include <netinet/in.h> */
/* #include <netdb.h> */
#include <stdio.h>
#include <stdlib.h>
 
/* #include <various.h> */
/* #include <getopt.h> */
/* #include <io.h> */
 
static char NICHOST[] = "whois.internic.net";
char *host = NULL;
int optset = 0;
static void usage();
static void cleanup(int iExitCode);
 
void getwhoisserver(int argc, char **argv)
{
    int i = 1;
 
    while(i < argc)
    {
        if (!strcmp(argv[i], "-h"))
        {
            if (i + 2 < argc)
            {
                host = argv[i +1];
                optset = i + 1;
            }
            else
            {
                optset = argc;
            }
            return;
        }
        i++;
    }
    host = NICHOST;
    optset = 1;
}
 
int main(int argc, char **argv)
{
    char ch;
    struct sockaddr_in sin;
    struct hostent *hp;
    struct servent *sp;
    SOCKET s;
 
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;
 
    getwhoisserver(argc, argv);
    argc -= optset;
    argv += optset;
 
    if (!host || !argc)
        usage();
 
    /* Start winsock */
    wVersionRequested = MAKEWORD( 1, 1 );
    err = WSAStartup( wVersionRequested, &wsaData );
    if ( err != 0 )
    {
        /* Tell the user that we couldn't find a usable */
        /* WinSock DLL.                                 */
        perror("whois: WSAStartup failed");
        cleanup(1);
    }
 
    hp = gethostbyname(host);
    if (hp == NULL) {
        (void)fprintf(stderr, "whois: %s: ", host);
        cleanup(1);
    }
    host = hp->h_name;
 
    s = socket(hp->h_addrtype, SOCK_STREAM, 0);
    if (s == INVALID_SOCKET) {
        perror("whois: socket");
        cleanup(1);
    }
 
    memset(/*(caddr_t)*/&sin, 0, sizeof(sin));
    sin.sin_family = hp->h_addrtype;
    if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
        perror("whois: bind");
        cleanup(1);
    }
 
    memcpy((char *)&sin.sin_addr, hp->h_addr, hp->h_length);
    sp = getservbyname("nicname", "tcp");
    if (sp == NULL) {
        (void)fprintf(stderr, "whois: nicname/tcp: unknown service\n");
        cleanup(1);
    }
 
    sin.sin_port = sp->s_port;
 
    /* have network connection; identify the host connected with */
    (void)printf("[%s]\n", hp->h_name);
 
    if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
        fprintf(stderr, "whois: connect error = %d\n", WSAGetLastError());
        cleanup(1);
    }
 
    /* WinSock doesn't allow using a socket as a file descriptor. */
    /* Have to use send() and recv().  whois will drop connection. */
 
    /* For each request */
    while (argc-- > 1)
    {
        /* Send the request */
        send(s, *argv, strlen(*argv), 0);
        send(s, " ", 1, 0);
        argv++;
    }
    /* Send the last request */
    send(s, *argv, strlen(*argv), 0);
    send(s, "\r\n", 2, 0);
 
    /* Receive anything and print it */
    while (recv(s, &ch, 1, 0) == 1)
        putchar(ch);
 
    cleanup(0);
    return 0;
}
 
static void usage()
{
    (void)fprintf(stderr, "usage: whois [-h hostname] name ...\n");
    cleanup(1);
}
 
static void cleanup(int iExitCode)
{
    WSACleanup();
    exit(iExitCode);
}