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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