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
__td_setnodelay(int fd)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 }
97