usr/src/lib/libc/port/nsl/rpc_td.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*
  24  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 #pragma ident   "%Z%%M% %I%     %E% SMI"
  29
  30 #include "mt.h"
  31 #include "rpc_mt.h"
  32 #include <stdio.h>
  33 #include <rpc/rpc.h>
  34 #include <errno.h>
  35 #include <tiuser.h>
  36 #include <string.h>
  37 #include <stropts.h>
  38 #include <netinet/tcp.h>
  39 #include <stdlib.h>
  40
  41 #define MAXOPTSIZE 64
  42
  43 int
  44 __td_setnodelay(int fd)
  45 {
  46         int rval = 0;
  47         static mutex_t td_opt_lock = DEFAULTMUTEX;
  48         static struct t_optmgmt t_optreq, t_optret;
  49         int state;
  50
  51
  52         /* VARIABLES PROTECTED BY td_opt_lock: t_optreq, t_optret */
  53
  54         if ((state = t_getstate(fd)) == -1)
  55                 return (-1);
  56
  57         (void) mutex_lock(&td_opt_lock);
  58         if ((state == T_IDLE) && (t_optreq.flags != T_NEGOTIATE)) {
  59                 int i = 1;
  60                 struct opthdr *opt;
  61
  62                 t_optreq.flags = T_NEGOTIATE;
  63                 t_optreq.opt.maxlen = MAXOPTSIZE;
  64                 t_optreq.opt.buf = malloc(MAXOPTSIZE);
  65                 if (t_optreq.opt.buf == NULL) {
  66                         (void) mutex_unlock(&td_opt_lock);
  67                         t_errno = TSYSERR;
  68                         return (-1);
  69                 }
  70                 /* LINTED pointer cast */
  71                 opt = (struct opthdr *)(t_optreq.opt.buf);
  72                 opt->name = TCP_NODELAY;
  73                 opt->len = 4;
  74                 opt->level = IPPROTO_TCP;
  75                 (void) memcpy((caddr_t)(t_optreq.opt.buf +
  76                                 sizeof (struct opthdr)), &i, sizeof (int));
  77                 t_optreq.opt.len = (int)(sizeof (struct opthdr) +
  78                                                 sizeof (int));
  79
  80                 t_optret.opt.maxlen = MAXOPTSIZE;
  81                 t_optret.opt.len = 0;
  82                 t_optret.opt.buf = malloc(MAXOPTSIZE);
  83                 if (t_optret.opt.buf == NULL) {
  84                         (void) mutex_unlock(&td_opt_lock);
  85                         free(t_optreq.opt.buf);
  86                         t_errno = TSYSERR;
  87                         return (-1);
  88                 }
  89         }
  90
  91         if (state == T_IDLE)
  92                 rval = t_optmgmt(fd, &t_optreq, &t_optret);
  93
  94         (void) mutex_unlock(&td_opt_lock);
  95         return (rval);
  96 }