Fossil

** WEBPAGE: setup_email
**
** Administrative page for configuring and controlling email notification.
** Normally accessible via the /Admin/Email menu.
*/
void setup_email(void){
  static const char *const azSendMethods[] = {
    "off",   "Disabled",
    "pipe",  "Pipe to a command",
    "db",    "Store in a database",
    "dir",   "Store in a directory",
    "relay", "SMTP relay"
  };
  login_check_credentials();
  if( !g.perm.Setup ){
    login_needed(0);
    return;
  }
  db_begin_transaction();

  @ need to have a cron job running to invoke "fossil email exec"
  @ periodically.
  @ (Property: "email-autoexec")</p>
  @ <hr>

  multiple_choice_attribute("Email Send Method", "email-send-method", "esm",
       "off", count(azSendMethods)/2, azSendMethods);
  @ <p>How to send email.  Requires auxiliary information from the fields

  @ that follow. (Property: "email-send-method")</p>

  email_schema(1);

  entry_attribute("Command To Pipe Email To", 60, "email-send-command",
                   "ecmd", "sendmail -t", 0);
  @ <p>When the send method is "pipe to a command", this is the command
  @ that is run.  Email messages are piped into the standard input of this
  @ command.  The command is expected to extract the sender address,
  @ recepient addresses, and subject from the header of the piped email
  @ text.  (Property: "email-send-command")</p>

  entry_attribute("Database In Which To Store Email", 60, "email-send-db",
                   "esdb", "", 0);
  @ <p>When the send method is "store in a databaes", each email message is
  @ stored in an SQLite database file with the name given here.
  @ (Property: "email-send-db")</p>

  entry_attribute("Directory In Which To Store Email", 60, "email-send-dir",
                   "esdir", "", 0);
  @ <p>When the send method is "store in a directory", each email message is
  @ stored as a separate file in the directory shown here.
  @ (Property: "email-send-dir")</p>

  entry_attribute("SMTP relay host", 60, "email-send-relayhost",
                   "esrh", "", 0);
  @ <p>When the send method is "SMTP relay", each email message is
  @ transmitted via the SMTP protocol (rfc5321) to a "Mail Submission
  @ Agent" or "MSA" (rfc4409) at the hostname shown here.  Optionally
  @ append a colon and TCP port number (ex: smtp.example.com:587).
  @ The default TCP port number is 25.
  @ (Property: "email-send-relayhost")</p>
  @ <hr>

  entry_attribute("Administrator email address", 40, "email-admin",
                   "eadmin", "", 0);
  @ <p>This is the email for the human administrator for the system.
  @ Abuse and trouble reports are send here.
  @ (Property: "email-admin")</p>

  sqlite3 *db;               /* Database emails are sent to */
  sqlite3_stmt *pStmt;       /* Stmt to insert into the database */
  const char *zDest;         /* How to send email. */
  const char *zDb;           /* Name of database file */
  const char *zDir;          /* Directory in which to store as email files */
  const char *zCmd;          /* Command to run for each email */
  const char *zFrom;         /* Emails come from here */
  SmtpSession *pSmtp;        /* SMTP relay connection */
  Blob out;                  /* For zDest=="blob" */
  char *zErr;                /* Error message */
  int bImmediateFail;        /* On any error, call fossil_fatal() */
};
#endif /* INTERFACE */

/*
** Shutdown an emailer.  Clear all information other than the error message.
*/
static void emailerShutdown(EmailSender *p){
  sqlite3_finalize(p->pStmt);
  p->pStmt = 0;
  sqlite3_close(p->db);
  p->db = 0;
  p->zDb = 0;
  p->zDir = 0;
  p->zCmd = 0;
  if( p->pSmtp ){
    smtp_session_free(p->pSmtp);
    p->pSmtp = 0;
  }
  blob_reset(&p->out);
}

/*
** Put the EmailSender into an error state.
*/
static void emailerError(EmailSender *p, const char *zFormat, ...){

** The EmailSender object returned must be freed using email_sender_free().
*/
EmailSender *email_sender_new(const char *zAltDest, int bImmediateFail){
  EmailSender *p;

  p = fossil_malloc(sizeof(*p));
  memset(p, 0, sizeof(*p));
  blob_init(&p->out, 0, 0);
  p->bImmediateFail = bImmediateFail;
  if( zAltDest ){
    p->zDest = zAltDest;
  }else{
    p->zDest = db_get("email-send-method","off");
  }
  if( fossil_strcmp(p->zDest,"off")==0 ) return p;

    }
  }else if( fossil_strcmp(p->zDest, "pipe")==0 ){
    emailerGetSetting(p, &p->zCmd, "email-send-command");
  }else if( fossil_strcmp(p->zDest, "dir")==0 ){
    emailerGetSetting(p, &p->zDir, "email-send-dir");
  }else if( fossil_strcmp(p->zDest, "blob")==0 ){
    blob_init(&p->out, 0, 0);
  }else if( fossil_strcmp(p->zDest, "relay")==0 ){
    const char *zRelay = 0;
    emailerGetSetting(p, &zRelay, "email-send-relayhost");
    if( zRelay ){
      p->pSmtp = smtp_session_new(p->zFrom, zRelay, SMTP_DIRECT);
    }
  }
  return p;
}

/*
** Scan the header of the email message in pMsg looking for the
** (first) occurrance of zField.  Fill pValue with the content of
** that field.
**
** This routine initializes pValue.  Any prior content of pValue is
** discarded (leaked).
**
** Return non-zero on success.  Return 0 if no instance of the header
** is found.
*/
int email_header_value(Blob *pMsg, const char *zField, Blob *pValue){
  int nField = (int)strlen(zField);
  Blob line;
  blob_rewind(pMsg);
  blob_init(pValue,0,0);
  while( blob_line(pMsg, &line) ){
    int n, i;
    char *z;
    blob_trim(&line);
    n = blob_size(&line);
    if( n==0 ) return 0;
    if( n<nField+1 ) continue;
    z = blob_buffer(&line);
    if( sqlite3_strnicmp(z, zField, nField)==0 && z[nField]==':' ){
      for(i=nField+1; i<n && fossil_isspace(z[i]); i++){}
      blob_init(pValue, z+i, n-i);
      while( blob_line(pMsg, &line) ){
        blob_trim(&line);
        n = blob_size(&line);
        if( n==0 ) break;
        z = blob_buffer(&line);
        if( !fossil_isspace(z[0]) ) break;
        for(i=1; i<n && fossil_isspace(z[i]); i++){}
        blob_append(pValue, " ", 1);
        blob_append(pValue, z+i, n-i);
      }
      return 1;
    }
  }
  return 0;
}

/*
** Make a copy of the input string up to but not including the
** first ">" character.
**
** Verify that the string really that is to be copied really is a
** valid email address.  If it is not, then return NULL.
**
** This routine is more restrictive than necessary.  It does not
** allow comments, IP address, quoted strings, or certain uncommon
** characters.  The only non-alphanumerics allowed in the local
** part are "_", "+", "-" and "+".
*/
char *email_copy_addr(const char *z){
  int i;
  int nAt = 0;
  int nDot = 0;
  char c;
  if( z[0]=='.' ) return 0;  /* Local part cannot begin with "." */
  for(i=0; (c = z[i])!=0 && c!='>'; i++){
    if( fossil_isalnum(c) ){
      /* Alphanumerics are always ok */
    }else if( c=='@' ){
      if( nAt ) return 0;   /* Only a single "@"  allowed */
      if( i>64 ) return 0;  /* Local part too big */
      nAt = 1;
      nDot = 0;
      if( i==0 ) return 0;  /* Disallow empty local part */
      if( z[i-1]=='.' ) return 0; /* Last char of local cannot be "." */
      if( z[i+1]=='.' || z[i+1]=='-' ){
        return 0; /* Domain cannot begin with "." or "-" */
      }
    }else if( c=='-' ){
      if( z[i+1]=='>' ) return 0;  /* Last character cannot be "-" */
    }else if( c=='.' ){
      if( z[i+1]=='.' ) return 0;  /* Do not allow ".." */
      if( z[i+1]=='>' ) return 0;  /* Domain may not end with . */
      nDot++;
    }else if( (c=='_' || c=='+') && nAt==0 ){
      /* _ and + are ok in the local part */
    }else{
      return 0;   /* Anything else is an error */
    }
  }
  if( c!='>' ) return 0;      /* Missing final ">" */
  if( nAt==0 ) return 0;      /* No "@" found anywhere */
  if( nDot==0 ) return 0;     /* No "." in the domain */

  /* If we reach this point, the email address is valid */
  return mprintf("%.*s", i, z);
}

/*
** Extract all To: header values from the email header supplied.
** Store them in the array list.
*/
void email_header_to(Blob *pMsg, int *pnTo, char ***pazTo){
  int nTo = 0;
  char **azTo = 0;
  Blob v;
  char *z, *zAddr;
  int i;
  
  email_header_value(pMsg, "to", &v);
  z = blob_str(&v);
  for(i=0; z[i]; i++){
    if( z[i]=='<' && (zAddr = email_copy_addr(&z[i+1]))!=0 ){
      azTo = fossil_realloc(azTo, sizeof(azTo[0])*(nTo+1) );
      azTo[nTo++] = zAddr;
    }
  }
  *pnTo = nTo;
  *pazTo = azTo;
}

/*
** Free a list of To addresses obtained from a prior call to 
** email_header_to()
*/
void email_header_to_free(int nTo, char **azTo){
  int i;
  for(i=0; i<nTo; i++) fossil_free(azTo[i]);
  fossil_free(azTo);
}

/*
** Send a single email message.
**
** The recepient(s) must be specified using  "To:" or "Cc:" or "Bcc:" fields
** in the header.  Likewise, the header must contains a "Subject:" line.
** The header might also include fields like "Message-Id:" or

    }else{
      emailerError(p, "Could not open output pipe \"%s\"", p->zCmd);
    }
  }else if( p->zDir ){
    char *zFile = emailTempFilename(p->zDir);
    blob_write_to_file(&all, zFile);
    fossil_free(zFile);
  }else if( p->pSmtp ){
    char **azTo = 0;
    int nTo = 0;
    email_header_to(pHdr, &nTo, &azTo);
    if( nTo>0 ){
      smtp_send_msg(p->pSmtp, p->zFrom, nTo, azTo, blob_str(&all));
      email_header_to_free(nTo, azTo);
    }
  }else if( strcmp(p->zDest, "stdout")==0 ){
    char **azTo = 0;
    int nTo = 0;
    int i;
    email_header_to(pHdr, &nTo, &azTo);
    for(i=0; i<nTo; i++){
      fossil_print("X-To-Test-%d: [%s]\r\n", i, azTo[i]);
    }
    email_header_to_free(nTo, azTo);
    blob_add_final_newline(&all);
    fossil_print("%s", blob_str(&all));
  }
  blob_reset(&all);
}

/*

    p->logFile = va_arg(ap, FILE*);
  }
  if( smtpFlags & SMTP_TRACE_BLOB ){
    p->pTranscript = va_arg(ap, Blob*);
  }
  va_end(ap);
  if( (smtpFlags & SMTP_DIRECT)!=0 ){
    int i;
    p->zHostname = fossil_strdup(zDest);
    for(i=0; p->zHostname[i] && p->zHostname[i]!=':'; i++){}
    if( p->zHostname[i]==':' ){
      p->zHostname[i] = 0;
      url.port = atoi(&p->zHostname[i+1]);
    }
  }else{
    p->zHostname = smtp_mx_host(zDest);
  }
  if( p->zHostname==0 ){
    p->atEof = 1;
    p->zErr = mprintf("cannot locate SMTP server for \"%s\"", zDest);
    return p;

  blob_reset(&f);
}

/*
** Send a single email message to the SMTP server.
**
** All email addresses (zFrom and azTo) must be plain "local@domain"
** format without the surrounding "<..>".  This routine will add the
** necessary "<..>".
**
** The body of the email should be well-structured.  This routine will
** convert any \n line endings into \r\n and will escape lines containing
** just ".", but will not make any other alterations or corrections to
** the message content.
**

  blob_reset(&body);
}

/*****************************************************************************
** Server implementation
*****************************************************************************/












































/*
** Schema used by the email processing system.
*/
static const char zEmailSchema[] = 
@ -- bulk storage is in a separate table.  This table can store either
@ -- the body of email messages or transcripts of smtp sessions.
@ CREATE TABLE IF NOT EXISTS repository.emailblob(

    /* Finish the transaction after all changes are implemented */
    db_end_transaction(0);
  }
  smtp_server_clear(p, SMTPSRV_CLEAR_MSG);
}




















































/*
** COMMAND: smtpd
**
** Usage: %fossil smtpd [OPTIONS] REPOSITORY
**
** Begin a SMTP conversation with a client using stdin/stdout.  The
** received email is stored in REPOSITORY.

    }else
    if( strncmp(z, "HELO", 4)==0  && fossil_isspace(z[4]) ){
      smtp_server_send(&x, "250 ok\r\n");
    }else
    if( strncmp(z, "MAIL FROM:<", 11)==0 ){
      smtp_server_route_incoming(&x, 0);
      smtp_server_clear(&x, SMTPSRV_CLEAR_MSG);
      x.zFrom = email_copy_addr(z+11);
      if( x.zFrom==0 ){
        smtp_server_send(&x, "500 unacceptable email address\r\n");
      }else{
        smtp_server_send(&x, "250 ok\r\n");
      }
    }else
    if( strncmp(z, "RCPT TO:<", 9)==0 ){
      char *zAddr;
      if( x.zFrom==0 ){
        smtp_server_send(&x, "500 missing MAIL FROM\r\n");
        continue;
      }
      zAddr = email_copy_addr(z+9);
      if( zAddr==0 ){
        smtp_server_send(&x, "505 no such user\r\n");
        continue;
      }
      smtp_append_to(&x, zAddr, 0);
      if( x.nTo>=100 ){
        smtp_server_send(&x, "452 too many recipients\r\n");