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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <sys/types.h>
26 #include <sys/stat.h>
27 #include <sys/stream.h>
28 #include <sys/ddi.h>
29 #include <sys/sunddi.h>
30 #include <sys/priv_names.h>
31
32 /*
33 * This file contains generic goo needed to hook the STREAMS modules and
34 * drivers that live under uts/common/inet into the DDI. In order to use it,
35 * each module/driver should #define the symbols below (as appropriate) and
36 * then #include this source file; see the other uts/common/inet/<star>ddi.c
37 * files for examples of this in action.
38 *
39 * The symbols that all modules and drivers must define are:
40 *
41 * INET_NAME The name of the module/driver.
42 *
43 * The symbols that all modules must define are:
44 *
45 * INET_MODSTRTAB The name of the `streamtab' structure for this module.
46 * INET_MODDESC The one-line description for this module.
47 * INET_MODMTFLAGS The mt-streams(9F) flags for the module.
48 *
49 * The symbols that all drivers must define are:
50 *
51 * INET_DEVSTRTAB The name of the `streamtab' structure for this driver.
52 * INET_DEVDESC The one-line description for this driver.
53 * INET_DEVMTFLAGS The mt-streams(9F) flags for the driver.
54 * INET_DEVMINOR The minor number of the driver (usually 0).
55 *
56 * Drivers that need to masquerade as IP should set INET_DEVMTFLAGS to
57 * IP_DEVMTFLAGS and set INET_DEVSTRTAB to ipinfo.
58 *
59 * The symbols that all socket modules must define are:
60 *
61 * INET_SOCKDESC The one-line description for this socket module
62 * INET_SOCK_PROTO_CREATE_FUNC The function used to create PCBs
63 *
64 * In addition, socket modules that can be converted to TPI must define:
65 *
66 * INET_SOCK_PROTO_FB_FUNC The function used to fallback to TPI
67 */
68
69 #if !defined(INET_NAME)
70 #error inetddi.c: INET_NAME is not defined!
71 #elif !defined(INET_DEVDESC) && !defined(INET_MODDESC) && \
72 !defined(INET_SOCKDESC)
73 #error inetddi.c: at least one of INET_DEVDESC or INET_MODDESC or \
74 INET_SOCKDESC must be defined!
75 #elif defined(INET_DEVDESC) && !defined(INET_DEVSTRTAB)
76 #error inetddi.c: INET_DEVDESC is defined but INET_DEVSTRTAB is not!
77 #elif defined(INET_DEVDESC) && !defined(INET_DEVMTFLAGS)
78 #error inetddi.c: INET_DEVDESC is defined but INET_DEVMTFLAGS is not!
79 #elif defined(INET_DEVDESC) && !defined(INET_DEVMINOR)
80 #error inetddi.c: INET_DEVDESC is defined but INET_DEVMINOR is not!
81 #elif defined(INET_MODDESC) && !defined(INET_MODSTRTAB)
82 #error inetddi.c: INET_MODDESC is defined but INET_MODSTRTAB is not!
83 #elif defined(INET_MODDESC) && !defined(INET_MODMTFLAGS)
84 #error inetddi.c: INET_MODDESC is defined but INET_MODMTFLAGS is not!
85 #elif defined(INET_SOCKDESC) && !defined(SOCKMOD_VERSION)
86 #error inetddi.c: INET_SOCKDESC is defined but SOCKMOD_VERSION is not!
87 #elif defined(INET_SOCKDESC) && !defined(INET_SOCK_PROTO_CREATE_FUNC)
88 #error inetddi.c: INET_SOCKDESC is defined but INET_SOCK_PROTO_CREATE_FUNC \
89 is not!
90 #elif defined(INET_SOCK_PROTO_FB_FUNC) && !defined(INET_SOCK_FALLBACK_DEV_V4)
91 #error inetddi.c: INET_SOCK_PROTO_FB_FUNC is defined but \
92 INET_SOCK_FALLBACK_DEV_V4 is not!
93 #elif defined(INET_SOCK_PROTO_FB_FUNC) && !defined(INET_SOCK_FALLBACK_DEV_V6)
94 #error inetddi.c: INET_SOCK_PROTO_FB_FUNC is defined but \
95 INET_SOCK_FALLBACK_DEV_V6 is not!
96 #endif
97
98 #ifdef INET_DEVDESC
99
100 extern struct streamtab INET_DEVSTRTAB;
101
102 /*
103 * Drivers that actually want to be IP would set INET_DEVSTRTAB to ipinfo.
104 */
105
106 static dev_info_t *inet_dev_info;
107
108 #define INET_DEFAULT_PRIV_MODE 0666
109
110 static struct dev_priv {
111 char *driver;
112 int privonly;
113 const char *read_priv;
114 const char *write_priv;
115 } netdev_privs[] = {
116 {"icmp", PRIVONLY_DEV, PRIV_NET_ICMPACCESS, PRIV_NET_ICMPACCESS},
117 {"icmp6", PRIVONLY_DEV, PRIV_NET_ICMPACCESS, PRIV_NET_ICMPACCESS},
118 {"ip", PRIVONLY_DEV, PRIV_NET_RAWACCESS, PRIV_NET_RAWACCESS},
119 {"ip6", PRIVONLY_DEV, PRIV_NET_RAWACCESS, PRIV_NET_RAWACCESS},
120 {"keysock", PRIVONLY_DEV, PRIV_SYS_IP_CONFIG, PRIV_SYS_IP_CONFIG},
121 {"ipsecah", PRIVONLY_DEV, PRIV_SYS_IP_CONFIG, PRIV_SYS_IP_CONFIG},
122 {"ipsecesp", PRIVONLY_DEV, PRIV_SYS_IP_CONFIG, PRIV_SYS_IP_CONFIG},
123 {"spdsock", PRIVONLY_DEV, PRIV_SYS_IP_CONFIG, PRIV_SYS_IP_CONFIG},
124 {NULL, 0, NULL, NULL}
125 };
126
127 static int
128 inet_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
129 {
130 int i, ndevs;
131
132 if (cmd != DDI_ATTACH)
133 return (DDI_FAILURE);
134
135 inet_dev_info = devi;
136
137 ndevs = sizeof (netdev_privs) / sizeof (struct dev_priv);
138 for (i = 0; i < ndevs; i++) {
139 char *drv = netdev_privs[i].driver;
140 if (drv == NULL || strcmp(drv, ddi_driver_name(devi)) == 0)
141 break;
142 }
143
144 return (ddi_create_priv_minor_node(devi, INET_NAME, S_IFCHR,
145 INET_DEVMINOR, DDI_PSEUDO, netdev_privs[i].privonly,
146 netdev_privs[i].read_priv, netdev_privs[i].write_priv,
147 INET_DEFAULT_PRIV_MODE));
148 }
149
150 static int
151 inet_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
152 {
153 if (cmd != DDI_DETACH)
154 return (DDI_FAILURE);
155
156 ASSERT(devi == inet_dev_info);
157
158 ddi_remove_minor_node(devi, NULL);
159 return (DDI_SUCCESS);
160 }
161
162
163 /* ARGSUSED */
164 static int
165 inet_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
166 {
167 int error = DDI_FAILURE;
168
169 switch (cmd) {
170 case DDI_INFO_DEVT2DEVINFO:
171 if (inet_dev_info != NULL) {
172 *result = (void *)inet_dev_info;
173 error = DDI_SUCCESS;
174 }
175 break;
176
177 case DDI_INFO_DEVT2INSTANCE:
178 *result = NULL;
179 error = DDI_SUCCESS;
180 break;
181
182 default:
183 break;
184 }
185
186 return (error);
187 }
188
189 DDI_DEFINE_STREAM_OPS(inet_devops, nulldev, nulldev, inet_attach, inet_detach,
190 nulldev, inet_info, INET_DEVMTFLAGS, &INET_DEVSTRTAB,
191 ddi_quiesce_not_supported);
192
193 static struct modldrv modldrv = {
194 &mod_driverops,
195 INET_DEVDESC,
196 &inet_devops
197 };
198
199 #endif /* INET_DEVDESC */
200
201 #ifdef INET_MODDESC
202 extern struct streamtab INET_MODSTRTAB;
203
204 static struct fmodsw fsw = {
205 INET_NAME,
206 &INET_MODSTRTAB,
207 INET_MODMTFLAGS
208 };
209
210 static struct modlstrmod modlstrmod = {
211 &mod_strmodops,
212 INET_MODDESC,
213 &fsw
214 };
215
216 #endif /* INET_MODDESC */
217
218 #ifdef INET_SOCKDESC
219
220 #ifdef INET_SOCK_PROTO_FB_FUNC
221 static __smod_priv_t smodpriv = {
222 NULL,
223 NULL,
224 INET_SOCK_PROTO_FB_FUNC,
225 INET_SOCK_FALLBACK_DEV_V4,
226 INET_SOCK_FALLBACK_DEV_V6
227 };
228 #endif /* INET_SOCK_PROTO_FB_FUNC */
229
230 static struct smod_reg_s smodreg = {
231 SOCKMOD_VERSION,
232 INET_NAME,
233 SOCK_UC_VERSION,
234 SOCK_DC_VERSION,
235 INET_SOCK_PROTO_CREATE_FUNC,
236 #ifdef INET_SOCK_PROTO_FB_FUNC
237 &smodpriv
238 #else
239 NULL
240 #endif /* INET_SOCK_PROTO_FB_FUNC */
241 };
242
243 static struct modlsockmod modlsockmod = {
244 &mod_sockmodops,
245 INET_SOCKDESC,
246 &smodreg
247 };
248 #endif /* INET_SOCKDESC */
249
250 static struct modlinkage modlinkage = {
251 MODREV_1,
252 {
253 #ifdef INET_DEVDESC
254 &modldrv,
255 #endif
256 #ifdef INET_MODDESC
257 &modlstrmod,
258 #endif
259 #ifdef INET_SOCKDESC
260 &modlsockmod,
261 #endif
262 NULL
263 }
264 };