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 1997 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 allocate memory for the various TLI
42 * primitives.
43 *
44 * Returns 0 on success or a positive error value. On success, ptr is
45 * set the structure required.
46 */
47
48 #include <sys/param.h>
49 #include <sys/types.h>
50 #include <sys/user.h>
51 #include <sys/stream.h>
52 #include <sys/ioctl.h>
53 #include <sys/file.h>
54 #include <sys/stropts.h>
55 #include <sys/tihdr.h>
56 #include <sys/timod.h>
57 #include <sys/tiuser.h>
58 #include <sys/errno.h>
59 #include <sys/signal.h>
60 #include <sys/t_kuser.h>
61 #include <sys/kmem.h>
62 #include <sys/sysmacros.h>
63
64 static void _alloc_buf(struct netbuf *, t_scalar_t);
65
66 int
t_kalloc(TIUSER * tiptr,int struct_type,int fields,char ** ptr)67 t_kalloc(TIUSER *tiptr, int struct_type, int fields, char **ptr)
68 {
69 union structptrs {
70 char *caddr;
71 struct t_bind *bind;
72 struct t_call *call;
73 struct t_discon *dis;
74 struct t_optmgmt *opt;
75 struct t_kunitdata *udata;
76 struct t_uderr *uderr;
77 struct t_info *info;
78 } p;
79 t_scalar_t dsize;
80
81 if (ptr == NULL)
82 return (EINVAL);
83
84 /*
85 * allocate appropriate structure and the specified
86 * fields within each structure. Initialize the
87 * 'buf' and 'maxlen' fields of each.
88 */
89 switch (struct_type) {
90 case T_BIND:
91 p.bind = kmem_zalloc(sizeof (struct t_bind), KM_SLEEP);
92 if (fields & T_ADDR)
93 _alloc_buf(&p.bind->addr, tiptr->tp_info.addr);
94 *ptr = ((char *)p.bind);
95 return (0);
96
97 case T_CALL:
98 p.call = kmem_zalloc(sizeof (struct t_call), KM_SLEEP);
99 if (fields & T_ADDR)
100 _alloc_buf(&p.call->addr, tiptr->tp_info.addr);
101 if (fields & T_OPT)
102 _alloc_buf(&p.call->opt, tiptr->tp_info.options);
103 if (fields & T_UDATA) {
104 dsize = MAX(tiptr->tp_info.connect,
105 tiptr->tp_info.discon);
106 _alloc_buf(&p.call->opt, dsize);
107 }
108 *ptr = ((char *)p.call);
109 return (0);
110
111 case T_OPTMGMT:
112 p.opt = kmem_zalloc(sizeof (struct t_optmgmt), KM_SLEEP);
113 if (fields & T_OPT)
114 _alloc_buf(&p.opt->opt, tiptr->tp_info.options);
115 *ptr = ((char *)p.opt);
116 return (0);
117
118 case T_DIS:
119 p.dis = kmem_zalloc(sizeof (struct t_discon), KM_SLEEP);
120 if (fields & T_UDATA)
121 _alloc_buf(&p.dis->udata, tiptr->tp_info.discon);
122 *ptr = ((char *)p.dis);
123 return (0);
124
125 case T_UNITDATA:
126 p.udata = kmem_zalloc(sizeof (struct t_kunitdata), KM_SLEEP);
127 if (fields & T_ADDR)
128 _alloc_buf(&p.udata->addr, tiptr->tp_info.addr);
129 else
130 p.udata->addr.maxlen = p.udata->addr.len = 0;
131
132 if (fields & T_OPT)
133 _alloc_buf(&p.udata->opt, tiptr->tp_info.options);
134 else
135 p.udata->opt.maxlen = p.udata->opt.len = 0;
136
137 if (fields & T_UDATA) {
138 p.udata->udata.udata_mp = NULL;
139 p.udata->udata.buf = NULL;
140 p.udata->udata.maxlen = tiptr->tp_info.tsdu;
141 p.udata->udata.len = 0;
142 } else {
143 p.udata->udata.maxlen = p.udata->udata.len = 0;
144 }
145 *ptr = (char *)p.udata;
146 return (0);
147
148 case T_UDERROR:
149 p.uderr = kmem_zalloc(sizeof (struct t_uderr), KM_SLEEP);
150 if (fields & T_ADDR)
151 _alloc_buf(&p.uderr->addr, tiptr->tp_info.addr);
152 if (fields & T_OPT)
153 _alloc_buf(&p.uderr->opt, tiptr->tp_info.options);
154 *ptr = (char *)p.uderr;
155 return (0);
156
157 case T_INFO:
158 p.info = kmem_zalloc(sizeof (struct t_info), KM_SLEEP);
159 *ptr = (char *)p.info;
160 return (0);
161
162 default:
163 return (EINVAL);
164 }
165 }
166
167
168 static void
_alloc_buf(struct netbuf * buf,t_scalar_t n)169 _alloc_buf(struct netbuf *buf, t_scalar_t n)
170 {
171 switch (n) {
172 case -1:
173 buf->buf = kmem_zalloc(1024, KM_SLEEP);
174 buf->maxlen = 1024;
175 buf->len = 0;
176 break;
177
178 case 0:
179 case -2:
180 buf->buf = NULL;
181 buf->maxlen = 0;
182 buf->len = 0;
183 break;
184
185 default:
186 buf->buf = kmem_zalloc(n, KM_SLEEP);
187 buf->maxlen = n;
188 buf->len = 0;
189 break;
190 }
191 }
192