nsock_read.c

来自「Ubuntu packages of security software。 相」· C语言 代码 · 共 155 行

/***************************************************************************
 * nsock_read.c -- This contains the functions for requesting various read *
 * events from the nsock parallel socket event library                     *
 *                                                                         *
 ***********************IMPORTANT NSOCK LICENSE TERMS***********************
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 ***************************************************************************/

/* $Id: nsock_read.c 6635 2007-12-22 06:32:18Z fyodor $ */

#include "nsock_internal.h"

/* Read up to nlines lines (terminated with \n, which of course
   inclues \r\n), or until EOF, or until the timeout, whichever comes
   first.  Note that NSE_STATUS_SUCCESS will be returned in the case
   of EOF or tiemout if at least 1 char has been read.  Also note that
   you may get more than 'nlines' back -- we just stop once "at least"
   'nlines' is read */
nsock_event_id nsock_readlines(nsock_pool nsp, nsock_iod ms_iod, 
			 nsock_ev_handler handler, int timeout_msecs,
			 void *userdata, int nlines) {
  msiod *nsi = (msiod *) ms_iod;
  mspool *ms = (mspool *) nsp;
  msevent *nse;


  nse = msevent_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
  assert(nse);

  if (ms->tracelevel > 0) {
    if (nsi->peerlen > 0)
	nsock_trace(ms, "Read request for %d lines from IOD #%li [%s:%hi] EID %li", nlines, nsi->id, 
		    inet_ntop_ez(&nsi->peer, nsi->peerlen), nsi_peerport(nsi), nse->id);
    else 
      nsock_trace(ms, "Read request for %d lines from IOD #%li (peer unspecified) EID %li", nlines, 
		  nsi->id, nse->id);
  }
  
  nse->readinfo.read_type = NSOCK_READLINES;
  nse->readinfo.num = nlines;
  
  nsp_add_event(ms, nse);
  
  return nse->id;
}

/* Same as above, except it tries to read at least 'nbytes' instead of 
   'nlines'. */
nsock_event_id nsock_readbytes(nsock_pool nsp, nsock_iod ms_iod,
			 nsock_ev_handler handler, int timeout_msecs, 
			 void *userdata, int nbytes) {

  msiod *nsi = (msiod *) ms_iod;
  mspool *ms = (mspool *) nsp;
  msevent *nse;

  nse = msevent_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
  assert(nse);

  if (ms->tracelevel > 0) {
    if (nsi->peerlen > 0)
	nsock_trace(ms, "Read request for %d bytes from IOD #%li [%s:%hi] EID %li", nbytes, nsi->id, 
		    inet_ntop_ez(&nsi->peer, nsi->peerlen), nsi_peerport(nsi), nse->id);
    else 
      nsock_trace(ms, "Read request for %d bytes from IOD #%li (peer unspecified) EID %li", nbytes, 
		  nsi->id, nse->id);
  }

  nse->readinfo.read_type = NSOCK_READBYTES;
  nse->readinfo.num = nbytes;
  
  nsp_add_event(ms, nse);
  
  return nse->id;

}


/* The simplest read function -- returns NSE_STATUS_SUCCESS when it
   reads anything, otherwise it returns timeout, eof, or error as
   appropriate */
nsock_event_id nsock_read(nsock_pool nsp, nsock_iod ms_iod, nsock_ev_handler handler, 
		    int timeout_msecs, void *userdata) {

  msiod *nsi = (msiod *) ms_iod;
  mspool *ms = (mspool *) nsp;
  msevent *nse;

  nse = msevent_new(ms, NSE_TYPE_READ, nsi, timeout_msecs, handler, userdata);
  assert(nse);

  if (ms->tracelevel > 0) {
    if (nsi->peerlen > 0)
	nsock_trace(ms, "Read request from IOD #%li [%s:%hi] (timeout: %dms) EID %li", nsi->id, inet_ntop_ez(&nsi->peer, nsi->peerlen), nsi_peerport(nsi), timeout_msecs, nse->id);
    else 
      nsock_trace(ms, "Read request from IOD #%li (peer unspecified) (timeout: %dms) EID %li", nsi->id, timeout_msecs, nse->id);
  }

  nse->readinfo.read_type = NSOCK_READ;
  
  nsp_add_event(ms, nse);
  
  return nse->id;

}