src/src/lookups/whoson.c

   1 /* $Cambridge: exim/src/src/lookups/whoson.c,v 1.5 2009/11/16 19:50:38 nm4 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2009 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10 /* This code originally came from Robert Wal. */
  11
  12 #include "../exim.h"
  13
  14
  15 /* We can't just compile this code and allow the library mechanism to omit the
  16 functions if they are not wanted, because we need to have the WHOSON headers
  17 available for compiling. Therefore, compile these functions only if
  18 LOOKUP_WHOSON is defined. However, some compilers don't like compiling empty
  19 modules, so keep them happy with a dummy when skipping the rest. Make it
  20 reference itself to stop picky compilers complaining that it is unused, and put
  21 in a dummy argument to stop even pickier compilers complaining about infinite
  22 loops. */
  23
  24 #ifndef LOOKUP_WHOSON
  25 static void dummy(int x) { dummy(x-1); }
  26 #else
  27
  28
  29 #include <whoson.h>        /* Public header */
  30 #include "whoson.h"        /* Local header */
  31
  32
  33 /*************************************************
  34 *              Open entry point                  *
  35 *************************************************/
  36
  37 /* See local README for interface description. */
  38
  39 void *
  40 whoson_open(uschar *filename, uschar **errmsg)
  41 {
  42 filename = filename;   /* Keep picky compilers happy */
  43 errmsg = errmsg;
  44 return (void *)(1);    /* Just return something non-null */
  45 }
  46
  47
  48 /*************************************************
  49 *               Find entry point                 *
  50 *************************************************/
  51
  52 /* See local README for interface description. */
  53
  54 int
  55 whoson_find(void *handle, uschar *filename, uschar *query, int length,
  56   uschar **result, uschar **errmsg, BOOL *do_cache)
  57 {
  58 uschar buffer[80];
  59 handle = handle;          /* Keep picky compilers happy */
  60 filename = filename;
  61 length = length;
  62 errmsg = errmsg;
  63 do_cache = do_cache;
  64
  65 switch (wso_query(query, CS buffer, sizeof(buffer)))
  66   {
  67   case 0:
  68   *result = string_copy(buffer);    /* IP in database; return name of user */
  69   return OK;
  70
  71   case +1:
  72   return FAIL;                      /* IP not in database */
  73
  74   default:
  75   *errmsg = string_sprintf("WHOSON: failed to complete: %s", buffer);
  76   return DEFER;
  77   }
  78 }
  79
  80 #endif  /* LOOKUP_WHOSON */
  81
  82 /* End of lookups/whoson.c */