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 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*
41 * Kernel TLI-like function to bind a transport endpoint
42 * to an address.
43 *
44 * Returns 0 on success or positive error code.
45 */
46
47 #include <sys/param.h>
48 #include <sys/types.h>
49 #include <sys/proc.h>
50 #include <sys/file.h>
51 #include <sys/user.h>
52 #include <sys/errno.h>
53 #include <sys/stream.h>
54 #include <sys/strsubr.h>
55 #include <sys/ioctl.h>
56 #include <sys/stropts.h>
57 #include <sys/vnode.h>
58 #include <sys/tihdr.h>
59 #include <sys/timod.h>
60 #include <sys/tiuser.h>
61 #include <sys/t_kuser.h>
62 #include <sys/kmem.h>
63 #include <sys/sysmacros.h>
64
65 int
t_kbind(TIUSER * tiptr,struct t_bind * req,struct t_bind * ret)66 t_kbind(TIUSER *tiptr, struct t_bind *req, struct t_bind *ret)
67 {
68 struct T_bind_req *bind_req;
69 struct T_bind_ack *bind_ack;
70 int bindsz;
71 vnode_t *vp;
72 file_t *fp;
73 char *buf;
74 struct strioctl strioc;
75 int retval;
76 int error;
77
78 error = 0;
79 retval = 0;
80 fp = tiptr->fp;
81 vp = fp->f_vnode;
82
83 /*
84 * send the ioctl request and wait
85 * for a reply.
86 */
87 bindsz = (req == NULL) ? 0 : req->addr.len;
88 bindsz = MAX(bindsz, tiptr->tp_info.addr);
89 bindsz += MAX(TBINDREQSZ, TBINDACKSZ);
90 buf = kmem_alloc(bindsz, KM_SLEEP);
91
92 /* LINTED pointer alignment */
93 bind_req = (struct T_bind_req *)buf;
94 bind_req->PRIM_type = T_BIND_REQ;
95 bind_req->ADDR_length = (req == NULL ? 0 : req->addr.len);
96 bind_req->ADDR_offset = TBINDREQSZ;
97 bind_req->CONIND_number = (req == NULL ? 0 : req->qlen);
98
99 if (bind_req->ADDR_length)
100 bcopy(req->addr.buf, buf + bind_req->ADDR_offset,
101 bind_req->ADDR_length);
102
103 strioc.ic_cmd = TI_BIND;
104 strioc.ic_timout = 0;
105 strioc.ic_dp = buf;
106 strioc.ic_len = (int)TBINDREQSZ + bind_req->ADDR_length;
107
108 /*
109 * Usually ioctl()s are performed with the credential of the caller;
110 * in this particular case we specifically use the credential of
111 * the opener as this call is typically done in the context of a user
112 * process but on behalf of the kernel, e.g., a client connection
113 * to a server which is later shared by different users.
114 * At open time, we make sure to set fp->f_cred to kcred if such is
115 * the case.
116 */
117 error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, fp->f_cred,
118 &retval);
119 if (error)
120 goto badbind;
121 if (retval) {
122 if ((retval & 0xff) == TSYSERR)
123 error = (retval >> 8) & 0xff;
124 else
125 error = t_tlitosyserr(retval & 0xff);
126 goto badbind;
127 }
128
129 /* LINTED pointer alignment */
130 bind_ack = (struct T_bind_ack *)strioc.ic_dp;
131 if (strioc.ic_len < TBINDACKSZ || bind_ack->ADDR_length == 0) {
132 error = EIO;
133 goto badbind;
134 }
135
136 /*
137 * copy bind data into users buffer
138 */
139 if (ret) {
140 if (ret->addr.maxlen > bind_ack->ADDR_length)
141 ret->addr.len = bind_ack->ADDR_length;
142 else
143 ret->addr.len = ret->addr.maxlen;
144
145 bcopy(buf + bind_ack->ADDR_offset, ret->addr.buf,
146 ret->addr.len);
147
148 ret->qlen = bind_ack->CONIND_number;
149 }
150
151 badbind:
152 kmem_free(buf, bindsz);
153 return (error);
154 }
155