1/* $NetBSD: if_agrsubr.c,v 1.10 2015/08/24 22:21:26 pooka Exp $ */
2
3/*-
4 * Copyright (c)2005 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: if_agrsubr.c,v 1.10 2015/08/24 22:21:26 pooka Exp $");
31
32#ifdef _KERNEL_OPT
33#include "opt_inet.h"
34#endif
35
36#include <sys/param.h>
37#include <sys/callout.h>
38#include <sys/malloc.h>
39#include <sys/systm.h>
40#include <sys/types.h>
41#include <sys/queue.h>
42#include <sys/sockio.h>
43
44#include <net/if.h>
45
46#include <net/agr/if_agrvar_impl.h>
47#include <net/agr/if_agrsubr.h>
48
49struct agr_mc_entry {
50 TAILQ_ENTRY(agr_mc_entry) ame_q;
51 int ame_refcnt;
52 struct agr_ifreq ame_ifr; /* XXX waste */
53};
54
55static struct agr_mc_entry *agr_mc_lookup(struct agr_multiaddrs *,
56 const struct sockaddr *);
57static int agrport_mc_add_callback(struct agr_port *, void *);
58static int agrport_mc_del_callback(struct agr_port *, void *);
59static int agrmc_mc_add_callback(struct agr_mc_entry *, void *);
60static int agrmc_mc_del_callback(struct agr_mc_entry *, void *);
61
62static int agr_mc_add(struct agr_multiaddrs *, const struct sockaddr *);
63static int agr_mc_del(struct agr_multiaddrs *, const struct sockaddr *);
64
65int
66agr_mc_purgeall(struct agr_softc *sc, struct agr_multiaddrs *ama)
67{
68 struct agr_mc_entry *ame;
69 int error = 0;
70
71 while ((ame = TAILQ_FIRST(&ama->ama_addrs)) != NULL) {
72 error = agr_port_foreach(sc,
73 agrport_mc_del_callback, &ame->ame_ifr);
74 if (error) {
75 /* XXX XXX */
76 printf("%s: error %d\n", __func__, error);
77 }
78 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q);
79 free(ame, M_DEVBUF);
80 }
81
82 return error;
83}
84
85int
86agr_mc_init(struct agr_softc *sc, struct agr_multiaddrs *ama)
87{
88
89 TAILQ_INIT(&ama->ama_addrs);
90
91 return 0;
92}
93
94/* ==================== */
95
96static struct agr_mc_entry *
97agr_mc_lookup(struct agr_multiaddrs *ama, const struct sockaddr *sa)
98{
99 struct agr_mc_entry *ame;
100
101 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) {
102 if (!memcmp(&ame->ame_ifr.ifr_ss, sa, sa->sa_len))
103 return ame;
104 }
105
106 return NULL;
107}
108
109int
110agr_mc_foreach(struct agr_multiaddrs *ama,
111 int (*func)(struct agr_mc_entry *, void *), void *arg)
112{
113 struct agr_mc_entry *ame;
114 int error = 0;
115
116 TAILQ_FOREACH(ame, &ama->ama_addrs, ame_q) {
117 error = (*func)(ame, arg);
118 if (error) {
119 /*
120 * XXX how to recover?
121 * we can try to restore setting, but it can also fail..
122 */
123 break;
124 }
125 }
126
127 return error;
128}
129
130static int
131agr_mc_add(struct agr_multiaddrs *ama, const struct sockaddr *sa)
132{
133 struct agr_mc_entry *ame;
134
135 ame = agr_mc_lookup(ama, sa);
136 if (ame) {
137 ame->ame_refcnt++;
138 return 0;
139 }
140
141 ame = malloc(sizeof(*ame), M_DEVBUF, M_NOWAIT | M_ZERO);
142 if (ame == NULL)
143 return ENOMEM;
144
145 memcpy(&ame->ame_ifr.ifr_ss, sa, sa->sa_len);
146 ame->ame_refcnt = 1;
147 TAILQ_INSERT_TAIL(&ama->ama_addrs, ame, ame_q);
148
149 return ENETRESET;
150}
151
152static int
153agr_mc_del(struct agr_multiaddrs *ama, const struct sockaddr *sa)
154{
155 struct agr_mc_entry *ame;
156
157 ame = agr_mc_lookup(ama, sa);
158 if (ame == NULL)
159 return ENOENT;
160
161 ame->ame_refcnt--;
162 if (ame->ame_refcnt > 0)
163 return 0;
164
165 TAILQ_REMOVE(&ama->ama_addrs, ame, ame_q);
166 free(ame, M_DEVBUF);
167
168 return ENETRESET;
169}
170
171/* ==================== */
172
173int
174agr_port_foreach(struct agr_softc *sc,
175 int (*func)(struct agr_port *, void *), void *arg)
176{
177 struct agr_port *port;
178 int error = 0;
179
180 TAILQ_FOREACH(port, &sc->sc_ports, port_q) {
181 if ((port->port_flags & (AGRPORT_LARVAL | AGRPORT_DETACHING))) {
182 continue;
183 }
184 error = (func)(port, arg);
185 if (error) {
186 /*
187 * XXX how to recover?
188 * we can try to restore setting, but it can also fail..
189 */
190 break;
191 }
192 }
193
194 return error;
195}
196
197/* ==================== */
198
199static int
200agrmc_mc_add_callback(struct agr_mc_entry *ame, void *arg)
201{
202
203 return agrport_mc_add_callback(arg, &ame->ame_ifr);
204}
205
206static int
207agrmc_mc_del_callback(struct agr_mc_entry *ame, void *arg)
208{
209
210 return agrport_mc_del_callback(arg, &ame->ame_ifr);
211}
212
213int
214agr_configmulti_port(struct agr_multiaddrs *ama, struct agr_port *port,
215 bool add)
216{
217
218 return agr_mc_foreach(ama,
219 add ? agrmc_mc_add_callback : agrmc_mc_del_callback, port);
220}
221
222/* -------------------- */
223
224static int
225agrport_mc_add_callback(struct agr_port *port, void *arg)
226{
227
228 return agrport_ioctl(port, SIOCADDMULTI, arg);
229}
230
231static int
232agrport_mc_del_callback(struct agr_port *port, void *arg)
233{
234
235 return agrport_ioctl(port, SIOCDELMULTI, arg);
236}
237
238int
239agr_configmulti_ifreq(struct agr_softc *sc, struct agr_multiaddrs *ama,
240 struct ifreq *ifr, bool add)
241{
242 int error;
243
244 if (add)
245 error = agr_mc_add(ama, ifreq_getaddr(SIOCADDMULTI, ifr));
246 else
247 error = agr_mc_del(ama, ifreq_getaddr(SIOCDELMULTI, ifr));
248
249 if (error != ENETRESET)
250 return error;
251
252 return agr_port_foreach(sc,
253 add ? agrport_mc_add_callback : agrport_mc_del_callback, ifr);
254}
255
256/* ==================== */
257
258int
259agr_port_getmedia(struct agr_port *port, u_int *media, u_int *status)
260{
261 struct ifmediareq ifmr;
262 int error;
263
264 memset(&ifmr, 0, sizeof(ifmr));
265 ifmr.ifm_count = 0;
266 error = agrport_ioctl(port, SIOCGIFMEDIA, (void *)&ifmr);
267
268 if (error == 0) {
269 *media = ifmr.ifm_active;
270 *status = ifmr.ifm_status;
271 }
272
273 return error;
274}
275