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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
25 */
26
27 #include <sys/types.h>
28 #include <sys/conf.h>
29 #include <sys/modctl.h>
30 #include <sys/stream.h>
31 #include <sys/strsubr.h>
32 #include <sys/strsun.h>
33 #include <sys/zone.h>
34 #include <inet/common.h>
35 #include <inet/led.h>
36 #include <inet/nd.h>
37 #include <netinet/in.h>
38
39 #include "ncaconf.h"
40
41 extern caddr_t nca_g_nd; /* Head of 'named dispatch' variable list */
42
43 #define INET_NAME "nca"
44 #define INET_MODSTRTAB ncainfo
45 #define INET_DEVSTRTAB ncainfo
46 #define INET_MODDESC "NCA STREAMS module 1.6"
47 #define INET_DEVDESC "NCA STREAMS driver 1.6"
48 #define INET_DEVMINOR 0
49 #define INET_DEVMTFLAGS D_MP
50 #define INET_MODMTFLAGS D_MP
51
52 #include "../inetddi.c"
53
54 /*ARGSUSED*/
55 static int
nca_open(queue_t * q,dev_t * devp,int flag,int sflag,cred_t * credp)56 nca_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
57 {
58 /* Reopen supported */
59 if (q->q_ptr != NULL)
60 return (0);
61
62 /*
63 * NCA is not supported in non-global zones; we enforce this restriction
64 * here.
65 */
66 if (credp != NULL && crgetzoneid(credp) != GLOBAL_ZONEID) {
67 return (ENOTSUP);
68 }
69
70 if (! (sflag & MODOPEN)) {
71 /* Device instance */
72 RD(q)->q_ptr = (void *)B_TRUE;
73 WR(q)->q_ptr = (void *)B_TRUE;
74 } else {
75 /* Modopen just pass through */
76 RD(q)->q_ptr = (void *)B_FALSE;
77 WR(q)->q_ptr = (void *)B_FALSE;
78 }
79 qprocson(q);
80 return (0);
81 }
82
83 static int
nca_close(queue_t * q)84 nca_close(queue_t *q)
85 {
86 qprocsoff(q);
87 RD(q)->q_ptr = NULL;
88 WR(q)->q_ptr = NULL;
89 return (0);
90 }
91
92 static void
nca_rput(queue_t * q,mblk_t * mp)93 nca_rput(queue_t *q, mblk_t *mp)
94 {
95 /* Passthrough */
96 putnext(q, mp);
97 }
98
99 static void
nca_wput(queue_t * q,mblk_t * mp)100 nca_wput(queue_t *q, mblk_t *mp)
101 {
102 struct iocblk *iocp;
103
104 if (! (boolean_t)q->q_ptr) {
105 iocp = (struct iocblk *)mp->b_rptr;
106 if (DB_TYPE(mp) == M_IOCTL && iocp->ioc_cmd == NCA_SET_IF) {
107 miocnak(q, mp, 0, ENOTSUP);
108 return;
109 }
110 /* Module, passthrough */
111 putnext(q, mp);
112 return;
113 }
114
115 switch (DB_TYPE(mp)) {
116 case M_IOCTL:
117 iocp = (struct iocblk *)mp->b_rptr;
118 switch (iocp->ioc_cmd) {
119 case ND_SET:
120 case ND_GET:
121 if (! nd_getset(q, nca_g_nd, mp)) {
122 miocnak(q, mp, 0, ENOENT);
123 return;
124 }
125 qreply(q, mp);
126 break;
127 default:
128 miocnak(q, mp, 0, ENOTSUP);
129 break;
130 }
131 break;
132 default:
133 freemsg(mp);
134 break;
135 }
136 }
137
138 static struct module_info info = {
139 0, "nca", 1, INFPSZ, 65536, 1024
140 };
141
142 static struct qinit rinit = {
143 (pfi_t)nca_rput, NULL, nca_open, nca_close, NULL, &info
144 };
145
146 static struct qinit winit = {
147 (pfi_t)nca_wput, NULL, nca_open, nca_close, NULL, &info
148 };
149
150 struct streamtab ncainfo = {
151 &rinit, &winit
152 };
153
154 int
_init(void)155 _init(void)
156 {
157 return (mod_install(&modlinkage));
158 }
159
160 int
_fini(void)161 _fini(void)
162 {
163 return (EBUSY);
164 }
165
166 int
_info(struct modinfo * modinfop)167 _info(struct modinfo *modinfop)
168 {
169 return (mod_info(&modlinkage, modinfop));
170 }
171