external/ibm-public/postfix/dist/src/smtpd/smtpd_xforward.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      smtpd_xforward 3
   6 /* SUMMARY
   7 /*      maintain XCLIENT information
   8 /* SYNOPSIS
   9 /*      #include "smtpd.h"
  10 /*
  11 /*      void    smtpd_xforward_init(state)
  12 /*      SMTPD_STATE *state;
  13 /*
  14 /*      void    smtpd_xforward_preset(state)
  15 /*      SMTPD_STATE *state;
  16 /*
  17 /*      void    smtpd_xforward_reset(state)
  18 /*      SMTPD_STATE *state;
  19 /* DESCRIPTION
  20 /*      smtpd_xforward_init() zeroes the attributes for storage of
  21 /*      XFORWARD command parameters.
  22 /*
  23 /*      smtpd_xforward_preset() takes the result from smtpd_xforward_init()
  24 /*      and sets all fields to the same "unknown" value that regular
  25 /*      client attributes would have.
  26 /*
  27 /*      smtpd_xforward_reset() restores the state from smtpd_xforward_init().
  28 /* LICENSE
  29 /* .ad
  30 /* .fi
  31 /*      The Secure Mailer license must be distributed with this software.
  32 /* AUTHOR(S)
  33 /*      Wietse Venema
  34 /*      IBM T.J. Watson Research
  35 /*      P.O. Box 704
  36 /*      Yorktown Heights, NY 10598, USA
  37 /*--*/
  38
  39 /* System library. */
  40
  41 #include <sys_defs.h>
  42
  43 /* Utility library. */
  44
  45 #include <mymalloc.h>
  46 #include <msg.h>
  47
  48 /* Global library. */
  49
  50 #include <mail_proto.h>
  51
  52 /* Application-specific. */
  53
  54 #include <smtpd.h>
  55
  56 /* smtpd_xforward_init - initialize XCLIENT attributes */
  57
  58 void    smtpd_xforward_init(SMTPD_STATE *state)
  59 {
  60     state->xforward.flags = 0;
  61     state->xforward.name = 0;
  62     state->xforward.addr = 0;
  63     state->xforward.port = 0;
  64     state->xforward.namaddr = 0;
  65     state->xforward.protocol = 0;
  66     state->xforward.helo_name = 0;
  67     state->xforward.ident = 0;
  68     state->xforward.domain = 0;
  69 }
  70
  71 /* smtpd_xforward_preset - set xforward attributes to "unknown" */
  72
  73 void    smtpd_xforward_preset(SMTPD_STATE *state)
  74 {
  75
  76     /*
  77      * Sanity checks.
  78      */
  79     if (state->xforward.flags)
  80         msg_panic("smtpd_xforward_preset: bad flags: 0x%x",
  81                   state->xforward.flags);
  82
  83     /*
  84      * This is a temporary solution. Unknown forwarded attributes get the
  85      * same values as unknown normal attributes, so that we don't break
  86      * assumptions in pre-existing code.
  87      */
  88     state->xforward.flags = SMTPD_STATE_XFORWARD_INIT;
  89     state->xforward.name = mystrdup(CLIENT_NAME_UNKNOWN);
  90     state->xforward.addr = mystrdup(CLIENT_ADDR_UNKNOWN);
  91     state->xforward.port = mystrdup(CLIENT_PORT_UNKNOWN);
  92     state->xforward.namaddr = mystrdup(CLIENT_NAMADDR_UNKNOWN);
  93     state->xforward.rfc_addr = mystrdup(CLIENT_ADDR_UNKNOWN);
  94     /* Leave helo at zero. */
  95     state->xforward.protocol = mystrdup(CLIENT_PROTO_UNKNOWN);
  96     /* Leave ident at zero. */
  97     /* Leave domain context at zero. */
  98 }
  99
 100 /* smtpd_xforward_reset - reset XCLIENT attributes */
 101
 102 void    smtpd_xforward_reset(SMTPD_STATE *state)
 103 {
 104 #define FREE_AND_WIPE(s) { if (s) myfree(s); s = 0; }
 105
 106     state->xforward.flags = 0;
 107     FREE_AND_WIPE(state->xforward.name);
 108     FREE_AND_WIPE(state->xforward.addr);
 109     FREE_AND_WIPE(state->xforward.port);
 110     FREE_AND_WIPE(state->xforward.namaddr);
 111     FREE_AND_WIPE(state->xforward.rfc_addr);
 112     FREE_AND_WIPE(state->xforward.protocol);
 113     FREE_AND_WIPE(state->xforward.helo_name);
 114     FREE_AND_WIPE(state->xforward.ident);
 115     FREE_AND_WIPE(state->xforward.domain);
 116 }