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 /*
23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <sys/stream.h>
29 #include <net/bpf.h>
30 #include <net/bpfdesc.h>
31
32 /*
33 * This file provides the link to the functions required from the mac
34 * module. It is currently in bpf, rather than mac (like ipnet_bpf)
35 * because of the mac/dls split. The bpf driver needs to know when
36 * interfaces appear and disappear and the best place for that is in
37 * dls. Unfortunately all of the other functions used here are found
38 * in the mac module, making it seem ill suited to being at home in
39 * dls. Similarly it has even less purpose being in mac as it is
40 * today.
41 */
42 static int mac_bpf_open(const char *, uintptr_t *, zoneid_t);
43 static void mac_bpf_close(uintptr_t);
44 static const char *mac_bpf_name(uintptr_t);
45 static int mac_bpf_type(uintptr_t);
46 static void mac_bpf_sdu_get(uintptr_t, uint_t *);
47 static int mac_bpf_tx(uintptr_t, mblk_t *);
48 static uintptr_t mac_bpf_promisc_add(uintptr_t, int, void *, uintptr_t *, int);
49 static void mac_bpf_promisc_remove(uintptr_t);
50 static int mac_bpf_client_open(uintptr_t, uintptr_t *);
51 static void mac_bpf_client_close(uintptr_t);
52 static const char *mac_bpf_client_name(uintptr_t);
53 static int mac_bpf_getdlt(uintptr_t, uint_t *);
54 static int mac_bpf_getlinkid(const char *, datalink_id_t *, zoneid_t);
55 static int mac_bpf_getzone(uintptr_t, zoneid_t *);
56
57 bpf_provider_t bpf_mac = {
58 BPR_MAC,
59 mac_bpf_open,
60 mac_bpf_close,
61 mac_bpf_name,
62 mac_bpf_type,
63 mac_bpf_sdu_get,
64 mac_bpf_tx,
65 mac_bpf_promisc_add,
66 mac_bpf_promisc_remove,
67 mac_bpf_getlinkid,
68 mac_bpf_client_close,
69 mac_bpf_client_name,
70 mac_bpf_client_open,
71 mac_bpf_getzone,
72 mac_bpf_getdlt
73 };
74
75 /*ARGSUSED*/
76 static int
mac_bpf_open(const char * name,uintptr_t * mhandlep,zoneid_t zoneid)77 mac_bpf_open(const char *name, uintptr_t *mhandlep, zoneid_t zoneid)
78 {
79 return (mac_open_by_linkname(name, (mac_handle_t *)mhandlep));
80 }
81
82 static void
mac_bpf_close(uintptr_t mhandle)83 mac_bpf_close(uintptr_t mhandle)
84 {
85 mac_close((mac_handle_t)mhandle);
86 }
87
88 static const char *
mac_bpf_name(uintptr_t mhandle)89 mac_bpf_name(uintptr_t mhandle)
90 {
91 return (mac_name((mac_handle_t)mhandle));
92 }
93
94 static int
mac_bpf_type(uintptr_t mhandle)95 mac_bpf_type(uintptr_t mhandle)
96 {
97 return (mac_nativetype((mac_handle_t)mhandle));
98 }
99
100 static void
mac_bpf_sdu_get(uintptr_t mhandle,uint_t * mtup)101 mac_bpf_sdu_get(uintptr_t mhandle, uint_t *mtup)
102 {
103 mac_sdu_get((mac_handle_t)mhandle, NULL, mtup);
104 }
105
106 static int
mac_bpf_tx(uintptr_t chandle,mblk_t * pkt)107 mac_bpf_tx(uintptr_t chandle, mblk_t *pkt)
108 {
109 /*
110 * If the mac layer cannot deliver a packet as requested by BPF then
111 * simply have the mac layer drop it. BPF isn't interested in doing
112 * any amount of retry - that's left to the application.
113 */
114 return (mac_tx((mac_client_handle_t)chandle, pkt, 0,
115 MAC_DROP_ON_NO_DESC, NULL));
116 }
117
118 static uintptr_t
mac_bpf_promisc_add(uintptr_t chandle,int how,void * arg,uintptr_t * promisc,int flags)119 mac_bpf_promisc_add(uintptr_t chandle, int how, void *arg, uintptr_t *promisc,
120 int flags)
121 {
122 return (mac_promisc_add((mac_client_handle_t)chandle, how, bpf_mtap,
123 arg, (mac_promisc_handle_t *)promisc, flags));
124 }
125
126 static void
mac_bpf_promisc_remove(uintptr_t phandle)127 mac_bpf_promisc_remove(uintptr_t phandle)
128 {
129 mac_promisc_remove((mac_promisc_handle_t)phandle);
130 }
131
132 static int
mac_bpf_client_open(uintptr_t mhandle,uintptr_t * chandlep)133 mac_bpf_client_open(uintptr_t mhandle, uintptr_t *chandlep)
134 {
135 return (mac_client_open((mac_handle_t)mhandle,
136 (mac_client_handle_t *)chandlep, NULL,
137 MAC_OPEN_FLAGS_USE_DATALINK_NAME));
138 }
139
140 static void
mac_bpf_client_close(uintptr_t chandle)141 mac_bpf_client_close(uintptr_t chandle)
142 {
143 mac_client_close((mac_client_handle_t)chandle, 0);
144 }
145
146 static const char *
mac_bpf_client_name(uintptr_t chandle)147 mac_bpf_client_name(uintptr_t chandle)
148 {
149 return (mac_client_name((mac_client_handle_t)chandle));
150 }
151
152 /*ARGSUSED*/
153 static int
mac_bpf_getlinkid(const char * name,datalink_id_t * idp,zoneid_t zoneid)154 mac_bpf_getlinkid(const char *name, datalink_id_t *idp, zoneid_t zoneid)
155 {
156 int error;
157
158 /*
159 * If at first we don't succeed, try again, just in case it is in
160 * hiding. The first call requires the datalink management daemon
161 * (the authorative source of information about name to id mapping)
162 * to be present and answering upcalls, the seond does not.
163 */
164 error = dls_mgmt_get_linkid(name, idp);
165 if (error != 0)
166 error = dls_devnet_macname2linkid(name, idp);
167
168 return (error);
169 }
170
171 static int
mac_bpf_getzone(uintptr_t handle,zoneid_t * zip)172 mac_bpf_getzone(uintptr_t handle, zoneid_t *zip)
173 {
174 mac_perim_handle_t mph;
175 int error;
176
177 mac_perim_enter_by_mh((mac_handle_t)handle, &mph);
178 error = dls_link_getzid(mac_name((mac_handle_t)handle), zip);
179 mac_perim_exit(mph);
180 return (error);
181 }
182
183 static int
mac_bpf_getdlt(uintptr_t handle,uint_t * dltp)184 mac_bpf_getdlt(uintptr_t handle, uint_t *dltp)
185 {
186 *dltp = mac_nativetype((mac_handle_t)handle);
187
188 return (0);
189 }
190