ei_send_reg.c

来自「OTP是开放电信平台的简称」· C语言 代码 · 共 105 行

/* ``The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved via the world wide web at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Initial Developer of the Original Code is Ericsson Utvecklings AB.
 * Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
 * AB. All Rights Reserved.''
 * 
 *     $Id$
 */
#ifdef __WIN32__
#include <winsock2.h>
#include <windows.h>
#include <winbase.h>

#elif VXWORKS
#include <sys/types.h>
#include <unistd.h>

#else /* unix */
#include <sys/types.h>
#include <unistd.h>
#include <sys/uio.h>
#endif

#include "eidef.h"
#include "eiext.h"
#include "ei_connect.h"
#include "ei_internal.h"
#include "putget.h"
#include "ei_trace.h"
#include "show_msg.h"

/* FIXME this is not useed !!!!! */
/* FIXME merge with ei_send.c */

/* length (4), PASS_THROUGH (1), header, message */
int ei_ei_send_reg_encoded(ei_cnode* ec, int fd, const erlang_pid *from,
			   const char *to, const char *msg, int msglen)
{
  char *s, header[1400]; /* see size calculation below */
  erlang_trace *token = NULL;
  int index = 5; /* reserve 5 bytes for control message */
#ifdef HAVE_WRITEV
  struct iovec v[2];
#endif

  /* are we tracing? */
  /* check that he can receive trace tokens first */
  if (ei_distversion(fd) > 0)
    token = ei_trace(0,(erlang_trace *)NULL);

  /* header = REG_SEND, from, cookie, toname         max sizes: */
  ei_encode_version(header,&index);                     /*   1 */
  if (token) { 
    ei_encode_tuple_header(header,&index,5);            /*   2 */
    ei_encode_long(header,&index,ERL_REG_SEND_TT);      /*   2 */
  } else {
    ei_encode_tuple_header(header,&index,4);    
    ei_encode_long(header,&index,ERL_REG_SEND); 
  }
  ei_encode_pid(header,&index,from);                    /* 268 */
  ei_encode_atom(header,&index,"" /*ei_getfdcookie(ec, fd)*/ );       /* 258 */
  ei_encode_atom(header,&index,to);                     /* 268 */

  if (token) ei_encode_trace(header,&index,token);      /* 534 */

  /* control message (precedes header actually) */
  /* length = 1 ('p') + header len + message len */
  s = header;
  put32be(s, index + msglen - 4);                       /*   4 */
  put8(s, ERL_PASS_THROUGH);                                /*   1 */
                                                /*** sum: 1336 */
  
#ifdef DEBUG_DIST
  if (ei_trace_distribution > 0) ei_show_sendmsg(stderr,header,msg);
#endif
  
#ifdef HAVE_WRITEV

  v[0].iov_base = (char *)header;
  v[0].iov_len = index;
  v[1].iov_base = (char *)msg;
  v[1].iov_len = msglen;

  if (writev(fd,v,2) != index+msglen) return -1;
  
#else
  
  /* no writev() */
  if (writesocket(fd,header,index) != index) return -1;
  if (writesocket(fd,msg,msglen) != msglen) return -1;

#endif

  return 0;
}