## modules/wh/wh_queries.c

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## FUNCTIONS

This source file includes following functions.

1. WH_connect
2. WH_sock

       1 /***************************************
       2   $Revision: 1.10 $
       3
       4   Whois query (wh) - connects to a whois server and returns result
       5
       6   Status: NOT REVIEWED, TESTED
       7
       8   Design and implementation by: Marek Bukowy
       9
      10   Note:  still not final. Probably SK calls should be moved to the
      11          calling routine
      12
      13   ******************/ /******************
      14   Copyright (c) 1999                              RIPE NCC
      15
      16   All Rights Reserved
      17
      18   Permission to use, copy, modify, and distribute this software and its
      19   documentation for any purpose and without fee is hereby granted,
      20   provided that the above copyright notice appear in all copies and that
      21   both that copyright notice and this permission notice appear in
      22   supporting documentation, and that the name of the author not be
      23   used in advertising or publicity pertaining to distribution of the
      24   software without specific, written prior permission.
      25
      26   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
      27   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
      28   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
      29   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
      30   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      31   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
      32   ***************************************/
      33
      34 #include <sys/types.h>
      35 #include <sys/socket.h>
      36 #include <netinet/in.h>
      37 #include <netdb.h>
      38 #include <stdio.h>
      39
      40 #include <erroutines.h>
      41 #include "sk.h"
      42
      43 /*+ opens a connection to hostname and queries it,
      44   sets sock to the socket number it got for this connection.
      45
      46   All reading and possibly other queries must be performed by
      47   the caller.
      48 +*/
      49 er_ret_t
      50 WH_connect(int *sock, char *hostname, int port)
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      51 {
      52
      53   struct sockaddr_in sin;
      54   struct hostent *hp;
      55   int s;
      56
      57 #if 0
      58   char log_str[256];
      59   sprintf(log_str, "would perform query >%s< to %s:%d  \n"
      60           "limits: line %d tmout %d and print on socket %d\n",
      61           query,hostname,port, maxlines,timeout,sock );
      62   log_inst_print(log_str);
      63 #endif
      64
      65   {
      66     int error;
      67     struct hostent result;
      68     char aliasbuf[8192]; /* Stevens, UNIX net. prog., p.304 */
      69
      70 #ifdef _LINUX
      71     if(gethostbyname_r(hostname,  &result, aliasbuf,
      72                        sizeof(aliasbuf), &hp, &error)<0) {
      73 #else /* default is Solaris implementation */
      74     if( (hp=gethostbyname_r(hostname,  &result, aliasbuf,
      75                        sizeof(aliasbuf), &error)) == NULL) {
      76 #endif
      77       return WH_BADHOST;
      78     }
      79   }
      80
      81   s = socket(AF_INET, SOCK_STREAM, 0);
      82   if (s < 0) {
      83     return WH_SOCKET;
      84   }
      85
      86   bzero((caddr_t)&sin, sizeof (sin));
      87   sin.sin_family = hp->h_addrtype;
      88   if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
      89     close(s);
      90     return WH_BIND;
      91   }
      92   bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
      93   sin.sin_port=htons(port);
      94
      95   if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
      96     close(s);
      97     return WH_CONNECT;
      98   }
      99
     100   /*  SK_puts(sock, "% Connection established...\n"); */
     101
     102   *sock = s;
     103
     104   return WH_OK;
     105 }
     106
     107
     108
     109 /*+ opens a whois connection to hostname, queries it and
     110   prints result on sock +*/
     111 er_ret_t
     112 WH_sock(int sock, char *hostname, int port,
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     113         char *query, int maxlines, int timeout)
     114 {
     115   int s;
     116   int ch;
     117   er_ret_t err;
     118
     119  if( (err = WH_connect(&s, hostname, port)) != WH_OK ) {
     120    return err;
     121  }
     122  else {
     123 #if 1
     124   {
     125     FILE *sfi;
     126     FILE *sfo;
     127
     128     sfi = fdopen(s, "r");
     129     sfo = fdopen(s, "w");
     130     if (sfi == NULL || sfo == NULL) {
     131       (void)close(s);
     132       return WH_OPEN;
     133     }
     134
     135     fprintf(sfo, "%s\r\n", query);
     136     fflush(sfo);
     137
     138     while ((ch = getc(sfi)) != EOF) {
     139       SK_putc(sock,ch);
     140     }
     141
     142     fclose(sfo);
     143     fclose(sfi);
     144   }
     145 #else
     146   SK_puts(s, query);
     147   SK_puts(s, "\r\n");
     148
     149   while( (ch = SK_getc(s)) != EOF ) {
     150     SK_putc(sock,ch);
     151   }
     152 #endif
     153   close(s);
     154
     155
     156
     157   return WH_OK;
     158  } /* if OK */
     159 }
     160

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