external/ibm-public/postfix/dist/src/cleanup/cleanup_rewrite.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      cleanup_rewrite 3
   6 /* SUMMARY
   7 /*      address canonicalization
   8 /* SYNOPSIS
   9 /*      #include <cleanup.h>
  10 /*
  11 /*      int     cleanup_rewrite_external(context_name, result, addr)
  12 /*      const char *context;
  13 /*      VSTRING *result;
  14 /*      const char *addr;
  15 /*
  16 /*      int     cleanup_rewrite_internal(context_name, result, addr)
  17 /*      const char *context;
  18 /*      VSTRING *result;
  19 /*      const char *addr;
  20 /*
  21 /*      int     cleanup_rewrite_tree(context_name, tree)
  22 /*      const char *context;
  23 /*      TOK822  *tree;
  24 /* DESCRIPTION
  25 /*      This module rewrites addresses to canonical form, adding missing
  26 /*      domains and stripping source routes etc., and performs
  27 /*      \fIcanonical\fR map lookups to map addresses to official form.
  28 /*      These functions return non-zero when the address was changed.
  29 /*
  30 /*      cleanup_rewrite_init() performs one-time initialization.
  31 /*
  32 /*      cleanup_rewrite_external() rewrites the external (quoted) string
  33 /*      form of an address.
  34 /*
  35 /*      cleanup_rewrite_internal() is a wrapper around the
  36 /*      cleanup_rewrite_external() routine that transforms from
  37 /*      internal (quoted) string form to external form and back.
  38 /*
  39 /*      cleanup_rewrite_tree() is a wrapper around the
  40 /*      cleanup_rewrite_external() routine that transforms from
  41 /*      internal parse tree form to external form and back.
  42 /*
  43 /*      Arguments:
  44 /* .IP context_name
  45 /*      The name of an address rewriting context that supplies
  46 /*      the equivalents of myorigin and mydomain.
  47 /* .IP result
  48 /*      Result buffer.
  49 /* .IP addr
  50 /*      Input buffer.
  51 /* DIAGNOSTICS
  52 /* LICENSE
  53 /* .ad
  54 /* .fi
  55 /*      The Secure Mailer license must be distributed with this software.
  56 /* AUTHOR(S)
  57 /*      Wietse Venema
  58 /*      IBM T.J. Watson Research
  59 /*      P.O. Box 704
  60 /*      Yorktown Heights, NY 10598, USA
  61 /*--*/
  62
  63 /* System library. */
  64
  65 #include <sys_defs.h>
  66
  67 /* Utility library. */
  68
  69 #include <msg.h>
  70 #include <vstring.h>
  71
  72 /* Global library. */
  73
  74 #include <tok822.h>
  75 #include <rewrite_clnt.h>
  76 #include <quote_822_local.h>
  77
  78 /* Application-specific. */
  79
  80 #include "cleanup.h"
  81
  82 #define STR             vstring_str
  83
  84 /* cleanup_rewrite_external - rewrite address external form */
  85
  86 int     cleanup_rewrite_external(const char *context_name, VSTRING *result,
  87                                          const char *addr)
  88 {
  89     rewrite_clnt(context_name, addr, result);
  90     return (strcmp(STR(result), addr) != 0);
  91 }
  92
  93 /* cleanup_rewrite_tree - rewrite address node */
  94
  95 int    cleanup_rewrite_tree(const char *context_name, TOK822 *tree)
  96 {
  97     VSTRING *dst = vstring_alloc(100);
  98     VSTRING *src = vstring_alloc(100);
  99     int     did_rewrite;
 100
 101     tok822_externalize(src, tree->head, TOK822_STR_DEFL);
 102     did_rewrite = cleanup_rewrite_external(context_name, dst, STR(src));
 103     tok822_free_tree(tree->head);
 104     tree->head = tok822_scan(STR(dst), &tree->tail);
 105     vstring_free(dst);
 106     vstring_free(src);
 107     return (did_rewrite);
 108 }
 109
 110 /* cleanup_rewrite_internal - rewrite address internal form */
 111
 112 int     cleanup_rewrite_internal(const char *context_name,
 113                                          VSTRING *result, const char *addr)
 114 {
 115     VSTRING *dst = vstring_alloc(100);
 116     VSTRING *src = vstring_alloc(100);
 117     int     did_rewrite;
 118
 119     quote_822_local(src, addr);
 120     did_rewrite = cleanup_rewrite_external(context_name, dst, STR(src));
 121     unquote_822_local(result, STR(dst));
 122     vstring_free(dst);
 123     vstring_free(src);
 124     return (did_rewrite);
 125 }