bezrkdos.c

mgcp协议源代码。支持多种编码：g711

void bezerk_check (MAILSTREAM *stream)
{
  unsigned long i = 1;
  if (bezerk_ping (stream)) {	/* ping mailbox */
				/* get new message status */
    while (i <= stream->nmsgs) mail_elt (stream,i++);
    mm_log ("Check completed",(long) NIL);
  }
}

/* Berkeley mail expunge mailbox
 * Accepts: MAIL stream
 */

void bezerk_expunge (MAILSTREAM *stream)
{
  mm_log ("Expunge ignored on readonly mailbox",WARN);
}

/* Berkeley mail copy message(s)
 * Accepts: MAIL stream
 *	    sequence
 *	    destination mailbox
 *	    copy options
 * Returns: T if success, NIL if failed
 */

long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
  char tmp[MAILTMPLEN];
  struct stat sbuf;
  MESSAGECACHE *elt;
  unsigned long i,j,k;
  int fd;
  mailproxycopy_t pc =
    (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
  if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
	mail_sequence (stream,sequence))) return NIL;
				/* make sure valid mailbox */
  if (!bezerk_isvalid (mailbox,tmp) && errno) {
    if (errno == ENOENT)
      mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
		 (long) NIL);
    else if (pc) return (*pc) (stream,sequence,mailbox,options);
    else if (mailboxfile (tmp,mailbox)) {
      sprintf (tmp,"Not a Bezerk-format mailbox: %s",mailbox);
      mm_log (tmp,ERROR);
    }
    else bezerk_badname (tmp,mailbox);
    return NIL;
  }
				/* open the destination */
  if ((fd = open (mailboxfile (tmp,mailbox),
		  O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE)) < 0) {
    sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }

  mm_critical (stream);		/* go critical */
  fstat (fd,&sbuf);		/* get current file size */
				/* for each requested message */
  for (i = 1; i <= stream->nmsgs; i++)
    if ((elt = mail_elt (stream,i))->sequence) {
      lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
				/* number of bytes to copy */
      j = elt->private.msg.full.offset + elt->rfc822_size;
      do {			/* read from source position */
	k = min (j,(unsigned long) MAILTMPLEN);
	read (LOCAL->fd,tmp,(unsigned int) k);
	if (write (fd,tmp,(unsigned int) k) < 0) {
	  sprintf (tmp,"Unable to write message: %s",strerror (errno));
	  mm_log (tmp,ERROR);
	  chsize (fd,sbuf.st_size);
	  close (fd);		/* punt */
	  mm_nocritical (stream);
	  return NIL;
	}
      } while (j -= k);		/* until done */
    }
  close (fd);			/* close the file */
  mm_nocritical (stream);	/* release critical */
				/* delete all requested messages */
  if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
    if ((elt = mail_elt (stream,i))->sequence) elt->deleted = T;
  return T;
}

/* Berkeley mail append message from stringstruct
 * Accepts: MAIL stream
 *	    destination mailbox
 *	    append callback
 *	    data for callback
 * Returns: T if append successful, else NIL
 */

#define BUFLEN MAILTMPLEN

long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
  struct stat sbuf;
  int fd;
  unsigned long i,j;
  char *flags,*date,buf[BUFLEN],tmp[MAILTMPLEN],file[MAILTMPLEN];
  FILE *sf,*df;
  MESSAGECACHE elt;
  STRING *message;
  long ret = LONGT;
				/* default stream to prototype */
  if (!stream) stream = &bezerkproto;
				/* make sure valid mailbox */
  if (!bezerk_isvalid (mailbox,tmp) && errno) {
    if (errno == ENOENT) {
      if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
	  ((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
	  ((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
	  ((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
	  ((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
	bezerk_create (NIL,"INBOX");
      else {
	mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
	return NIL;
      }
    }
    else if (mailboxfile (tmp,mailbox)) {
      sprintf (tmp,"Not a Bezerk-format mailbox: %.80ss",mailbox);
      mm_log (tmp,ERROR);
    }
    else bezerk_badname (tmp,mailbox);
    return NIL;
  }
  tzset ();			/* initialize timezone stuff */
				/* get first message */
  if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
  if (!(sf = tmpfile ())) {	/* must have scratch file */
    sprintf (tmp,"Unable to create scratch file: %.80s",strerror (errno));
    mm_log (tmp,ERROR);
  }

  do {				/* parse date */
    if (!date) rfc822_date (date = tmp);
    if (!mail_parse_date (&elt,date)) {
      sprintf (tmp,"Bad date in append: %.80s",date);
      mm_log (tmp,ERROR);
    }
    else {			/* user wants to suppress time zones? */
      if (mail_parameters (NIL,GET_NOTIMEZONES,NIL)) {
	time_t when = mail_longdate (&elt);
	date = ctime (&when);	/* use traditional date */
      }
				/* use POSIX-style date */
      else date = mail_cdate (tmp,&elt);
      if (!bezerk_append_msg (stream,sf,flags,date,message)) {
	sprintf (tmp,"Error writing scratch file: %.80s",strerror (errno));
	mm_log (tmp,ERROR);
      }
				/* get next message */
      else if ((*af) (stream,data,&flags,&date,&message)) continue;
    }
    fclose (sf);		/* punt scratch file */
    return NIL;			/* give up */
  } while (message);		/* until no more messages */
  if (fflush (sf) || fstat (fileno (sf),&sbuf)) {
    sprintf (tmp,"Error finishing scratch file: %.80s",strerror (errno));
    mm_log (tmp,ERROR);
    fclose (sf);		/* punt scratch file */
    return NIL;			/* give up */
  }
  i = sbuf.st_size;		/* size of scratch file */

  mm_critical (stream);		/* go critical */
				/* open the destination */
  if (((fd = open (mailboxfile (tmp,mailbox),
		  O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE)) < 0) ||
      !(df = fdopen (fd,"ab"))) {
    mm_nocritical (stream);	/* done with critical */
    sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }
  fstat (fd,&sbuf);		/* get current file size */
  while (i)			/* until written all bytes */
    if ((j = fread (buf,1,min ((long) BUFLEN,i),sf)) &&
	(fwrite (buf,1,j,df) == j)) i -= j;
  fclose (sf);			/* done with scratch file */
				/* make sure append wins */
  if (i || (fflush (df) == EOF)) {
    chsize (fd,sbuf.st_size);	/* revert file */
    close (fd);			/* make sure fclose() doesn't corrupt us */
    sprintf (buf,"Message append failed: %s",strerror (errno));
    mm_log (buf,ERROR);
    ret = NIL;			/* return error */
  }
  fclose (df);
  mm_nocritical (stream);	/* release critical */
  return ret;
}

/* Write single message to append scratch file
 * Accepts: MAIL stream
 *	    scratch file
 *	    flags
 *	    message stringstruct
 * Returns: NIL if write error, else T
 */

int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
		     STRING *msg)
{
  int c;
  unsigned long i,uf;
  char tmp[MAILTMPLEN];
  long f = mail_parse_flags (stream,flags,&uf);
				/* build initial header */
  if ((fprintf (sf,"From %s@%s %sStatus: ",
		myusername (),mylocalhost (),date) < 0) ||
      (f&fSEEN && (putc ('R',sf) == EOF)) ||
      (fputs ("\nX-Status: ",sf) == EOF) ||
      (f&fDELETED && (putc ('D',sf) == EOF)) ||
      (f&fFLAGGED && (putc ('F',sf) == EOF)) ||
      (f&fANSWERED && (putc ('A',sf) == EOF)) ||
      (f&fDRAFT && (putc ('T',sf) == EOF)) ||
      (fputs ("\nX-Keywords:",sf) == EOF)) return NIL;
  while (uf)			/* write user flags */
    if (fprintf (sf," %s",stream->user_flags[find_rightmost_bit (&uf)]) < 0)
      return NIL;
				/* tie off flags */
  if (putc ('\n',sf) == EOF) return NIL;
  while (SIZE (msg)) {		/* copy text to scratch file */
				/* possible delimiter if line starts with F */
    if ((c = 0xff & SNX (msg)) == 'F') {
				/* copy line to buffer */
      for (i = 1,tmp[0] = c; SIZE (msg) && (c != '\n') && (i < MAILTMPLEN);)
	if (((c = 0xff & SNX (msg)) != '\r') || !(SIZE (msg)) ||
	    (CHR (msg) != '\n')) tmp[i++] = c;
      if ((i > 4) && (tmp[1] == 'r') && (tmp[2] == 'o') && (tmp[3] == 'm') &&
	  (tmp[4] == ' ')) {	/* possible "From " line? */
				/* yes, see if need to write a widget */
	if (((c != '\n') || bezerk_valid_line (tmp,NIL,NIL)) &&
	    (putc ('>',sf) == EOF)) return NIL;
      }
				/* write buffered text */
      if (fwrite (tmp,1,i,sf) != i) return NIL;
      if (c == '\n') continue;	/* all done if got a complete line */
    }
				/* copy line, toss out CR from CRLF */
    do if (((c == '\r') && SIZE (msg) && ((c = 0xff & SNX (msg)) != '\n') &&
	    (putc ('\r',sf) == EOF)) || (putc (c,sf) == EOF)) return NIL;
    while ((c != '\n') && SIZE (msg) && ((c = 0xff & SNX (msg)) ? c : T));
  }
				/* write trailing newline and return */
  return (putc ('\n',sf) == EOF) ? NIL : T;
}


/* Return bad file name error message
 * Accepts: temporary buffer
 *	    file name
 * Returns: long NIL always
 */

long bezerk_badname (char *tmp,char *s)
{
  sprintf (tmp,"Invalid mailbox name: %s",s);
  mm_log (tmp,ERROR);
  return (long) NIL;
}

/* Parse mailbox
 * Accepts: MAIL stream
 * Returns: T if parse OK
 *	    NIL if failure, stream aborted
 */

long bezerk_parse (MAILSTREAM *stream)
{
  struct stat sbuf;
  MESSAGECACHE *elt;
  char *s,*t,tmp[MAILTMPLEN + 1],*db,datemsg[100];
  long i;
  int j,ti,zn;
  long curpos = LOCAL->filesize;
  long nmsgs = stream->nmsgs;
  long recent = stream->recent;
  short silent = stream->silent;
  fstat (LOCAL->fd,&sbuf);	/* get status */
  if (sbuf.st_size < curpos) {	/* sanity check */
    sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
    mm_log (tmp,ERROR);
    bezerk_close (stream,NIL);
    return NIL;
  }
  stream->silent = T;		/* don't pass up mm_exists() events yet */
  db = datemsg + strlen (strcpy (datemsg,"Unparsable date: "));
  while (sbuf.st_size - curpos){/* while there is data to read */
				/* get to that position in the file */
    lseek (LOCAL->fd,curpos,SEEK_SET);
				/* read first buffer's worth */
    read (LOCAL->fd,tmp,j = (int) min (i,(long) MAILTMPLEN));
    tmp[j] = '\0';		/* tie off buffer */
    if (!(ti = bezerk_valid_line (tmp,&t,&zn))) {
      mm_log ("Mailbox format invalidated (consult an expert), aborted",ERROR);
      bezerk_close (stream,NIL);
      return NIL;
    }

				/* swell the cache */
    mail_exists (stream,++nmsgs);
				/* instantiate an elt for this message */
    (elt = mail_elt (stream,nmsgs))->valid = T;
    elt->private.uid = ++stream->uid_last;
				/* note file offset of header */
    elt->private.special.offset = curpos;
				/* note offset of message */
    elt->private.msg.full.offset =
      (s = ((*t == '\015') ? (t + 2) : (t + 1))) - tmp;
				/* generate plausable IMAPish date string */
    db[2] = db[6] = db[20] = '-'; db[11] = ' '; db[14] = db[17] = ':';
				/* dd */
    db[0] = t[ti - 2]; db[1] = t[ti - 1];
				/* mmm */
    db[3] = t[ti - 6]; db[4] = t[ti - 5]; db[5] = t[ti - 4];
				/* hh */
    db[12] = t[ti + 1]; db[13] = t[ti + 2];
				/* mm */
    db[15] = t[ti + 4]; db[16] = t[ti + 5];
    if (t[ti += 6] == ':') {	/* ss if present */
      db[18] = t[++ti]; db[19] = t[++ti];
      ti++;			/* move to space */
    }
    else db[18] = db[19] = '0';	/* assume 0 seconds */
				/* yy -- advance over timezone if necessary */
    if (++zn == ++ti) ti += (((t[zn] == '+') || (t[zn] == '-')) ? 6 : 4);
    db[7] = t[ti]; db[8] = t[ti + 1]; db[9] = t[ti + 2]; db[10] = t[ti + 3];
    t = zn ? (t + zn) : "LCL";	/* zzz */
    db[21] = *t++; db[22] = *t++; db[23] = *t++;
    if ((db[21] != '+') && (db[21] != '-')) db[24] = '\0';
    else {			/* numeric time zone */
      db[20] = ' '; db[24] = *t++; db[25] = *t++; db[26] = '\0';
    }
				/* set internal date */
    if (!mail_parse_date (elt,db)) mm_log (datemsg,WARN);

    curpos += s - tmp;		/* advance position after header */
    t = strchr (s,'\012');	/* start of next line */
				/* find start of next message */
    while (!(bezerk_valid_line (s,NIL,NIL))) {
      if (t) {			/* have next line? */
	t++;			/* advance to new line */
	curpos += t - s;	/* update position and size */
	elt->rfc822_size += ((t - s) + ((t[-2] == '\015') ? 0 : 1));
	s = t;			/* move to next line */
	t = strchr (s,'\012');
      }
      else {			/* try next buffer */
	j = strlen (s);		/* length of unread data in buffer */
	if ((i = sbuf.st_size - curpos) && (i != j)) {
				/* get to that position in the file */
	  lseek (LOCAL->fd,curpos,SEEK_SET);
				/* read another buffer's worth */
	  read (LOCAL->fd,s = tmp,j = (int) min (i,(long) MAILTMPLEN));
	  tmp[j] = '\0';	/* tie off buffer */
	  if (!(t = strchr (s,'\012'))) fatal ("Line too long in mailbox");
	}
	else {
	  curpos += j;		/* last bit of data */
	  elt->rfc822_size += j;
	  break;
	}
      }
    }
  }
				/* update parsed file size */
  LOCAL->filesize = sbuf.st_size;
  stream->silent = silent;	/* can pass up events now */
  mail_exists (stream,nmsgs);	/* notify upper level of new mailbox size */
  mail_recent (stream,recent);	/* and of change in recent messages */
  return T;			/* return the winnage */
}

/* Berkeley locate header for a message
 * Accepts: MAIL stream
 *	    message number
 *	    pointer to returned header size
 * Returns: position of header in file
 */

unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
			     unsigned long *size)
{
  long siz;
  size_t i = 0;
  char c = '\0';
  char *s;
  char tmp[MAILTMPLEN];
  MESSAGECACHE *elt = mail_elt (stream,msgno);
  long pos = elt->private.special.offset + elt->private.msg.full.offset;
				/* is size known? */
  if (!(*size = elt->private.msg.header.text.size)) {
				/* get to header position */
    lseek (LOCAL->fd,pos,SEEK_SET);
				/* search message for CRLF CRLF */
    for (siz = 1; siz <= elt->rfc822_size; siz++) {
      if (!i &&			/* buffer empty? */
	  (read (LOCAL->fd,s = tmp,
		 i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
	return pos;
      else i--;
				/* two newline sequence? */
      if ((c == '\012') && (*s == '\012')) {
				/* yes, note for later */
	elt->private.msg.header.text.size = (*size = siz);
	return pos;		/* return to caller */
      }
      else if ((c == '\012') && (*s == '\015')) {
				/* yes, note for later */
	elt->private.msg.header.text.size = (*size = siz + 1);
	return pos;		/* return to caller */
      }
      else c = *s++;		/* next character */
    }
  }
  return pos;			/* have position */
}