external/ibm-public/postfix/dist/src/smtp/smtp_state.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      smtp_state 3
   6 /* SUMMARY
   7 /*      initialize/cleanup shared state
   8 /* SYNOPSIS
   9 /*      #include "smtp.h"
  10 /*
  11 /*      SMTP_STATE *smtp_state_alloc()
  12 /*
  13 /*      void    smtp_state_free(state)
  14 /*      SMTP_STATE *state;
  15 /* DESCRIPTION
  16 /*      smtp_state_init() initializes the shared state, and allocates
  17 /*      memory for buffers etc.
  18 /*
  19 /*      smtp_cleanup() destroys memory allocated by smtp_state_init().
  20 /* STANDARDS
  21 /* DIAGNOSTICS
  22 /* BUGS
  23 /* SEE ALSO
  24 /* LICENSE
  25 /* .ad
  26 /* .fi
  27 /*      The Secure Mailer license must be distributed with this software.
  28 /* AUTHOR(S)
  29 /*      Wietse Venema
  30 /*      IBM T.J. Watson Research
  31 /*      P.O. Box 704
  32 /*      Yorktown Heights, NY 10598, USA
  33 /*--*/
  34
  35 /* System library. */
  36
  37 #include <sys_defs.h>
  38
  39 /* Utility library. */
  40
  41 #include <mymalloc.h>
  42 #include <vstring.h>
  43 #include <msg.h>
  44
  45 /* Global library. */
  46
  47 #include <mail_params.h>
  48
  49 /* Application-specific. */
  50
  51 #include "smtp.h"
  52 #include "smtp_sasl.h"
  53
  54 /* smtp_state_alloc - initialize */
  55
  56 SMTP_STATE *smtp_state_alloc(void)
  57 {
  58     SMTP_STATE *state = (SMTP_STATE *) mymalloc(sizeof(*state));
  59
  60     state->misc_flags = 0;
  61     state->src = 0;
  62     state->service = 0;
  63     state->request = 0;
  64     state->session = 0;
  65     state->status = 0;
  66     state->space_left = 0;
  67     state->nexthop_domain = 0;
  68     if (var_smtp_cache_conn) {
  69         state->dest_label = vstring_alloc(10);
  70         state->dest_prop = vstring_alloc(10);
  71         state->endp_label = vstring_alloc(10);
  72         state->endp_prop = vstring_alloc(10);
  73         state->cache_used = htable_create(1);
  74     } else {
  75         state->dest_label = 0;
  76         state->dest_prop = 0;
  77         state->endp_label = 0;
  78         state->endp_prop = 0;
  79         state->cache_used = 0;
  80     }
  81     state->why = dsb_create();
  82
  83     /*
  84      * The process name, "smtp" or "lmtp", is also used as the DSN server
  85      * reply type and for SASL service information lookup. Since all three
  86      * external representations are identical there is no reason to transform
  87      * from some external form X to some Postfix-specific canonical internal
  88      * form, and then to transform from the internal form to external forms Y
  89      * and Z.
  90      */
  91     if (strcmp(var_procname, "lmtp") == 0) {
  92         state->misc_flags |= SMTP_MISC_FLAG_USE_LMTP;
  93     } else if (strcmp(var_procname, "smtp") == 0) {
  94         /* void */
  95     } else {
  96         msg_fatal("unexpected process name \"%s\" - "
  97                   "specify \"smtp\" or \"lmtp\"",
  98                   var_procname);
  99     }
 100     return (state);
 101 }
 102
 103 /* smtp_state_free - destroy state */
 104
 105 void    smtp_state_free(SMTP_STATE *state)
 106 {
 107     if (state->dest_label)
 108         vstring_free(state->dest_label);
 109     if (state->dest_prop)
 110         vstring_free(state->dest_prop);
 111     if (state->endp_label)
 112         vstring_free(state->endp_label);
 113     if (state->endp_prop)
 114         vstring_free(state->endp_prop);
 115     if (state->cache_used)
 116         htable_free(state->cache_used, (void (*) (char *)) 0);
 117     if (state->why)
 118         dsb_free(state->why);
 119
 120     myfree((char *) state);
 121 }