SMTP Plug-in Code

   /*
    * If you want to see this SMTP plug-in in action, you can save,
    * build and run the SMTP plug-in code in this file.
    * To download, see the Note at the beginning of this chapter.
   /*

   /*
    * MESSAGING SERVER - Sample Plug-in DLL
    * Author     : Sean Maurik
    * 4.1 Update : Sam Robertson 
    * 
    * Purpose    : This plug-in creates a log file, writes the
    *   first recipient of the first message passed into
    *   the SMTP plug-in, and then writes the control data obtained
    *   during the accept connection. The SMTP plug-in goes on to
    *   add a recipient to the recipient list and some
    *   text to the bottom of the message.
    */

#include <stdio.h>
#include <malloc.h>
#include <string.h>

#include "msg4plugins.h"

#ifdef WIN32
#define SAMPLE_EXPORT __declspec(dllexport)
#else
#define SAMPLE_EXPORT
#endif

SAMPLE_EXPORT int SamplePluginInit(pblock *Config)
{
   /* We don't have any global data or initialization
    * to do for this sample, so this init function 
    * just returns that it has completed.
    */

   /* unreferenced formal parameters that are not used */
   Config;
/* */

    return 1;
}

SAMPLE_EXPORT int SamplePlugin(pblock *Config,                               **ppInMsg,
                              Message ***pppOutMsg)
{
   char *bodyfile;
   Recipient *pRecip;
   Recipient new_rcpt;
   FILE *f;
   FILE *body;
   char *ControlText;
   char *PostOfficePath;

   /* unreferenced formal parameters that are not used */
   pppOutMsg;
   Config;
   /* */

   /* create a log file */
    f = fopen("log.out","w");

   if (f == NULL) {
   return MSG_CONTINUE;
   }

   /* print out the first recipient */
   pRecip = GetFirstRecipient (ppInMsg[0]);
   if (pRecip) {
      fprintf(f,"Recip #1 is %s\n",GetRecipientAddress(pRecip));
   }

   /* print out the control data to the log */
   ControlText = GetControlData(ppInMsg[0]);
   if (ControlText) {
      fprintf(f, "Control Data follows\n%s", ControlText);
   }

   /* free control data returned by GetControlData */
   FreeControlData(ControlText);

/* now add a new recipient */
   new_rcpt.Addr821 = (char*) malloc(strlen(
                     "<testuser@test.com>") + 1);
   strcpy(new_rcpt.Addr821, "<testuser@test.com>");
   new_rcpt.Ext     = NULL;
   new_rcpt.flags   = 0;

   /* this is the tricky part - you must have this magic value set */
   new_rcpt.magic = 0xdeadbeef;

   /* finally make the call */
   AddRecipient(ppInMsg[0],&new_rcpt);
   free(new_rcpt.Addr821);

   /* get body file name and path */
   bodyfile = GetMessageFile(*ppInMsg);
   fprintf(f,"GetMessageFile = %s\n",bodyfile);

   /* now open the message file and add some text */
   body = fopen(bodyfile,"a");
   if (body == NULL) {

      fprintf(f,"Couldn't append to body\n");
   } else {
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fpritf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fprintf(body,"This is a new body line\n");
      fclose(body);
   }

   /* get the post office path and print it to log */
   PostOfficePath = GetPostOfficePath(*ppInMsg);

   fprintf(f, "PostOffice = %s\n", PostOfficePath);

   /* close the log file */
   fclose(f);

   /* now return and the message will continue */
   return MSG_CONTINUE;

}

Last Updated: 05/13/99 11:41:54