2 * Linux NET3: Internet Group Management Protocol [IGMP]
4 * This code implements the IGMP protocol as defined in RFC1112. There has
5 * been a further revision of this protocol since which is now supported.
7 * If you have trouble with this module be careful what gcc you have used,
8 * the older version didn't come out right using gcc 2.5.8, the newer one
9 * seems to fall out with gcc 2.6.2.
11 * Version: $Id: igmp.c,v 1.47 2002/02/01 22:01:03 davem Exp $
14 * Alan Cox <Alan.Cox@linux.org>
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
23 * Alan Cox : Added lots of __inline__ to optimise
24 * the memory usage of all the tiny little
26 * Alan Cox : Dumped the header building experiment.
27 * Alan Cox : Minor tweaks ready for multicast routing
28 * and extended IGMP protocol.
29 * Alan Cox : Removed a load of inline directives. Gcc 2.5.8
30 * writes utterly bogus code otherwise (sigh)
31 * fixed IGMP loopback to behave in the manner
32 * desired by mrouted, fixed the fact it has been
33 * broken since 1.3.6 and cleaned up a few minor
36 * Chih-Jen Chang : Tried to revise IGMP to Version 2
37 * Tsu-Sheng Tsao E-mail: chihjenc@scf.usc.edu and tsusheng@scf.usc.edu
38 * The enhancements are mainly based on Steve Deering's
39 * ipmulti-3.5 source code.
40 * Chih-Jen Chang : Added the igmp_get_mrouter_info and
41 * Tsu-Sheng Tsao igmp_set_mrouter_info to keep track of
42 * the mrouted version on that device.
43 * Chih-Jen Chang : Added the max_resp_time parameter to
44 * Tsu-Sheng Tsao igmp_heard_query(). Using this parameter
45 * to identify the multicast router version
46 * and do what the IGMP version 2 specified.
47 * Chih-Jen Chang : Added a timer to revert to IGMP V2 router
48 * Tsu-Sheng Tsao if the specified time expired.
49 * Alan Cox : Stop IGMP from 0.0.0.0 being accepted.
50 * Alan Cox : Use GFP_ATOMIC in the right places.
51 * Christian Daudt : igmp timer wasn't set for local group
52 * memberships but was being deleted,
53 * which caused a "del_timer() called
54 * from %p with timer not initialized\n"
56 * Christian Daudt : removed del_timer from
57 * igmp_timer_expire function (960205).
58 * Christian Daudt : igmp_heard_report now only calls
59 * igmp_timer_expire if tm->running is
61 * Malcolm Beattie : ttl comparison wrong in igmp_rcv made
62 * igmp_heard_query never trigger. Expiry
63 * miscalculation fixed in igmp_heard_query
64 * and random() made to return unsigned to
65 * prevent negative expiry times.
66 * Alexey Kuznetsov: Wrong group leaving behaviour, backport
67 * fix from pending 2.1.x patches.
68 * Alan Cox: Forget to enable FDDI support earlier.
69 * Alexey Kuznetsov: Fixed leaving groups on device down.
70 * Alexey Kuznetsov: Accordance to igmp-v2-06 draft.
71 * David L Stevens: IGMPv3 support, with help from
75 #include <linux/module.h>
76 #include <asm/uaccess.h>
77 #include <asm/system.h>
78 #include <linux/types.h>
79 #include <linux/kernel.h>
80 #include <linux/jiffies.h>
81 #include <linux/string.h>
82 #include <linux/socket.h>
83 #include <linux/sockios.h>
85 #include <linux/inet.h>
86 #include <linux/netdevice.h>
87 #include <linux/skbuff.h>
88 #include <linux/inetdevice.h>
89 #include <linux/igmp.h>
90 #include <linux/if_arp.h>
91 #include <linux/rtnetlink.h>
92 #include <linux/times.h>
96 #include <net/protocol.h>
97 #include <net/route.h>
99 #include <net/checksum.h>
100 #include <linux/netfilter_ipv4.h>
101 #ifdef CONFIG_IP_MROUTE
102 #include <linux/mroute.h>
104 #ifdef CONFIG_PROC_FS
105 #include <linux/proc_fs.h>
106 #include <linux/seq_file.h>
109 #define IP_MAX_MEMBERSHIPS 20
110 #define IP_MAX_MSF 10
112 #ifdef CONFIG_IP_MULTICAST
113 /* Parameter names and values are taken from igmp-v2-06 draft */
115 #define IGMP_V1_Router_Present_Timeout (400*HZ)
116 #define IGMP_V2_Router_Present_Timeout (400*HZ)
117 #define IGMP_Unsolicited_Report_Interval (10*HZ)
118 #define IGMP_Query_Response_Interval (10*HZ)
119 #define IGMP_Unsolicited_Report_Count 2
122 #define IGMP_Initial_Report_Delay (1)
124 /* IGMP_Initial_Report_Delay is not from IGMP specs!
125 * IGMP specs require to report membership immediately after
126 * joining a group, but we delay the first report by a
127 * small interval. It seems more natural and still does not
128 * contradict to specs provided this delay is small enough.
131 #define IGMP_V1_SEEN(in_dev) (ipv4_devconf.force_igmp_version == 1 || \
132 (in_dev)->cnf.force_igmp_version == 1 || \
133 ((in_dev)->mr_v1_seen && \
134 time_before(jiffies, (in_dev)->mr_v1_seen)))
135 #define IGMP_V2_SEEN(in_dev) (ipv4_devconf.force_igmp_version == 2 || \
136 (in_dev)->cnf.force_igmp_version == 2 || \
137 ((in_dev)->mr_v2_seen && \
138 time_before(jiffies, (in_dev)->mr_v2_seen)))
140 static void igmpv3_add_delrec(struct in_device
*in_dev
, struct ip_mc_list
*im
);
141 static void igmpv3_del_delrec(struct in_device
*in_dev
, __be32 multiaddr
);
142 static void igmpv3_clear_delrec(struct in_device
*in_dev
);
143 static int sf_setstate(struct ip_mc_list
*pmc
);
144 static void sf_markstate(struct ip_mc_list
*pmc
);
146 static void ip_mc_clear_src(struct ip_mc_list
*pmc
);
147 static int ip_mc_add_src(struct in_device
*in_dev
, __be32
*pmca
, int sfmode
,
148 int sfcount
, __be32
*psfsrc
, int delta
);
150 static void ip_ma_put(struct ip_mc_list
*im
)
152 if (atomic_dec_and_test(&im
->refcnt
)) {
153 in_dev_put(im
->interface
);
158 #ifdef CONFIG_IP_MULTICAST
164 static __inline__
void igmp_stop_timer(struct ip_mc_list
*im
)
166 spin_lock_bh(&im
->lock
);
167 if (del_timer(&im
->timer
))
168 atomic_dec(&im
->refcnt
);
171 im
->unsolicit_count
= 0;
172 spin_unlock_bh(&im
->lock
);
175 /* It must be called with locked im->lock */
176 static void igmp_start_timer(struct ip_mc_list
*im
, int max_delay
)
178 int tv
=net_random() % max_delay
;
181 if (!mod_timer(&im
->timer
, jiffies
+tv
+2))
182 atomic_inc(&im
->refcnt
);
185 static void igmp_gq_start_timer(struct in_device
*in_dev
)
187 int tv
= net_random() % in_dev
->mr_maxdelay
;
189 in_dev
->mr_gq_running
= 1;
190 if (!mod_timer(&in_dev
->mr_gq_timer
, jiffies
+tv
+2))
194 static void igmp_ifc_start_timer(struct in_device
*in_dev
, int delay
)
196 int tv
= net_random() % delay
;
198 if (!mod_timer(&in_dev
->mr_ifc_timer
, jiffies
+tv
+2))
202 static void igmp_mod_timer(struct ip_mc_list
*im
, int max_delay
)
204 spin_lock_bh(&im
->lock
);
205 im
->unsolicit_count
= 0;
206 if (del_timer(&im
->timer
)) {
207 if ((long)(im
->timer
.expires
-jiffies
) < max_delay
) {
208 add_timer(&im
->timer
);
210 spin_unlock_bh(&im
->lock
);
213 atomic_dec(&im
->refcnt
);
215 igmp_start_timer(im
, max_delay
);
216 spin_unlock_bh(&im
->lock
);
221 * Send an IGMP report.
224 #define IGMP_SIZE (sizeof(struct igmphdr)+sizeof(struct iphdr)+4)
227 static int is_in(struct ip_mc_list
*pmc
, struct ip_sf_list
*psf
, int type
,
228 int gdeleted
, int sdeleted
)
231 case IGMPV3_MODE_IS_INCLUDE
:
232 case IGMPV3_MODE_IS_EXCLUDE
:
233 if (gdeleted
|| sdeleted
)
235 if (!(pmc
->gsquery
&& !psf
->sf_gsresp
)) {
236 if (pmc
->sfmode
== MCAST_INCLUDE
)
238 /* don't include if this source is excluded
241 if (psf
->sf_count
[MCAST_INCLUDE
])
242 return type
== IGMPV3_MODE_IS_INCLUDE
;
243 return pmc
->sfcount
[MCAST_EXCLUDE
] ==
244 psf
->sf_count
[MCAST_EXCLUDE
];
247 case IGMPV3_CHANGE_TO_INCLUDE
:
248 if (gdeleted
|| sdeleted
)
250 return psf
->sf_count
[MCAST_INCLUDE
] != 0;
251 case IGMPV3_CHANGE_TO_EXCLUDE
:
252 if (gdeleted
|| sdeleted
)
254 if (pmc
->sfcount
[MCAST_EXCLUDE
] == 0 ||
255 psf
->sf_count
[MCAST_INCLUDE
])
257 return pmc
->sfcount
[MCAST_EXCLUDE
] ==
258 psf
->sf_count
[MCAST_EXCLUDE
];
259 case IGMPV3_ALLOW_NEW_SOURCES
:
260 if (gdeleted
|| !psf
->sf_crcount
)
262 return (pmc
->sfmode
== MCAST_INCLUDE
) ^ sdeleted
;
263 case IGMPV3_BLOCK_OLD_SOURCES
:
264 if (pmc
->sfmode
== MCAST_INCLUDE
)
265 return gdeleted
|| (psf
->sf_crcount
&& sdeleted
);
266 return psf
->sf_crcount
&& !gdeleted
&& !sdeleted
;
272 igmp_scount(struct ip_mc_list
*pmc
, int type
, int gdeleted
, int sdeleted
)
274 struct ip_sf_list
*psf
;
277 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
278 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
))
285 static struct sk_buff
*igmpv3_newpack(struct net_device
*dev
, int size
)
290 struct igmpv3_report
*pig
;
292 skb
= alloc_skb(size
+ LL_RESERVED_SPACE(dev
), GFP_ATOMIC
);
297 struct flowi fl
= { .oif
= dev
->ifindex
,
299 .daddr
= IGMPV3_ALL_MCR
} },
300 .proto
= IPPROTO_IGMP
};
301 if (ip_route_output_key(&rt
, &fl
)) {
306 if (rt
->rt_src
== 0) {
312 skb
->dst
= &rt
->u
.dst
;
315 skb_reserve(skb
, LL_RESERVED_SPACE(dev
));
317 skb
->nh
.iph
= pip
=(struct iphdr
*)skb_put(skb
, sizeof(struct iphdr
)+4);
320 pip
->ihl
= (sizeof(struct iphdr
)+4)>>2;
322 pip
->frag_off
= htons(IP_DF
);
324 pip
->daddr
= rt
->rt_dst
;
325 pip
->saddr
= rt
->rt_src
;
326 pip
->protocol
= IPPROTO_IGMP
;
327 pip
->tot_len
= 0; /* filled in later */
328 ip_select_ident(pip
, &rt
->u
.dst
, NULL
);
329 ((u8
*)&pip
[1])[0] = IPOPT_RA
;
330 ((u8
*)&pip
[1])[1] = 4;
331 ((u8
*)&pip
[1])[2] = 0;
332 ((u8
*)&pip
[1])[3] = 0;
334 pig
=(struct igmpv3_report
*)skb_put(skb
, sizeof(*pig
));
335 skb
->h
.igmph
= (struct igmphdr
*)pig
;
336 pig
->type
= IGMPV3_HOST_MEMBERSHIP_REPORT
;
344 static int igmpv3_sendpack(struct sk_buff
*skb
)
346 struct iphdr
*pip
= skb
->nh
.iph
;
347 struct igmphdr
*pig
= skb
->h
.igmph
;
350 iplen
= skb
->tail
- (unsigned char *)skb
->nh
.iph
;
351 pip
->tot_len
= htons(iplen
);
354 igmplen
= skb
->tail
- (unsigned char *)skb
->h
.igmph
;
355 pig
->csum
= ip_compute_csum((void *)skb
->h
.igmph
, igmplen
);
357 return NF_HOOK(PF_INET
, NF_IP_LOCAL_OUT
, skb
, NULL
, skb
->dev
,
361 static int grec_size(struct ip_mc_list
*pmc
, int type
, int gdel
, int sdel
)
363 return sizeof(struct igmpv3_grec
) + 4*igmp_scount(pmc
,type
,gdel
,sdel
);
366 static struct sk_buff
*add_grhead(struct sk_buff
*skb
, struct ip_mc_list
*pmc
,
367 int type
, struct igmpv3_grec
**ppgr
)
369 struct net_device
*dev
= pmc
->interface
->dev
;
370 struct igmpv3_report
*pih
;
371 struct igmpv3_grec
*pgr
;
374 skb
= igmpv3_newpack(dev
, dev
->mtu
);
377 pgr
= (struct igmpv3_grec
*)skb_put(skb
, sizeof(struct igmpv3_grec
));
378 pgr
->grec_type
= type
;
379 pgr
->grec_auxwords
= 0;
381 pgr
->grec_mca
= pmc
->multiaddr
;
382 pih
= (struct igmpv3_report
*)skb
->h
.igmph
;
383 pih
->ngrec
= htons(ntohs(pih
->ngrec
)+1);
388 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
389 skb_tailroom(skb)) : 0)
391 static struct sk_buff
*add_grec(struct sk_buff
*skb
, struct ip_mc_list
*pmc
,
392 int type
, int gdeleted
, int sdeleted
)
394 struct net_device
*dev
= pmc
->interface
->dev
;
395 struct igmpv3_report
*pih
;
396 struct igmpv3_grec
*pgr
= NULL
;
397 struct ip_sf_list
*psf
, *psf_next
, *psf_prev
, **psf_list
;
398 int scount
, stotal
, first
, isquery
, truncate
;
400 if (pmc
->multiaddr
== IGMP_ALL_HOSTS
)
403 isquery
= type
== IGMPV3_MODE_IS_INCLUDE
||
404 type
== IGMPV3_MODE_IS_EXCLUDE
;
405 truncate
= type
== IGMPV3_MODE_IS_EXCLUDE
||
406 type
== IGMPV3_CHANGE_TO_EXCLUDE
;
410 psf_list
= sdeleted
? &pmc
->tomb
: &pmc
->sources
;
415 pih
= skb
? (struct igmpv3_report
*)skb
->h
.igmph
: NULL
;
417 /* EX and TO_EX get a fresh packet, if needed */
419 if (pih
&& pih
->ngrec
&&
420 AVAILABLE(skb
) < grec_size(pmc
, type
, gdeleted
, sdeleted
)) {
422 igmpv3_sendpack(skb
);
423 skb
= igmpv3_newpack(dev
, dev
->mtu
);
428 for (psf
=*psf_list
; psf
; psf
=psf_next
) {
431 psf_next
= psf
->sf_next
;
433 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
)) {
438 /* clear marks on query responses */
442 if (AVAILABLE(skb
) < sizeof(__be32
) +
443 first
*sizeof(struct igmpv3_grec
)) {
444 if (truncate
&& !first
)
445 break; /* truncate these */
447 pgr
->grec_nsrcs
= htons(scount
);
449 igmpv3_sendpack(skb
);
450 skb
= igmpv3_newpack(dev
, dev
->mtu
);
455 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
460 psrc
= (__be32
*)skb_put(skb
, sizeof(__be32
));
461 *psrc
= psf
->sf_inaddr
;
463 if ((type
== IGMPV3_ALLOW_NEW_SOURCES
||
464 type
== IGMPV3_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
) {
466 if ((sdeleted
|| gdeleted
) && psf
->sf_crcount
== 0) {
468 psf_prev
->sf_next
= psf
->sf_next
;
470 *psf_list
= psf
->sf_next
;
480 if (type
== IGMPV3_ALLOW_NEW_SOURCES
||
481 type
== IGMPV3_BLOCK_OLD_SOURCES
)
483 if (pmc
->crcount
|| isquery
) {
484 /* make sure we have room for group header */
485 if (skb
&& AVAILABLE(skb
)<sizeof(struct igmpv3_grec
)) {
486 igmpv3_sendpack(skb
);
487 skb
= NULL
; /* add_grhead will get a new one */
489 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
493 pgr
->grec_nsrcs
= htons(scount
);
496 pmc
->gsquery
= 0; /* clear query state on report */
500 static int igmpv3_send_report(struct in_device
*in_dev
, struct ip_mc_list
*pmc
)
502 struct sk_buff
*skb
= NULL
;
506 read_lock(&in_dev
->mc_list_lock
);
507 for (pmc
=in_dev
->mc_list
; pmc
; pmc
=pmc
->next
) {
508 if (pmc
->multiaddr
== IGMP_ALL_HOSTS
)
510 spin_lock_bh(&pmc
->lock
);
511 if (pmc
->sfcount
[MCAST_EXCLUDE
])
512 type
= IGMPV3_MODE_IS_EXCLUDE
;
514 type
= IGMPV3_MODE_IS_INCLUDE
;
515 skb
= add_grec(skb
, pmc
, type
, 0, 0);
516 spin_unlock_bh(&pmc
->lock
);
518 read_unlock(&in_dev
->mc_list_lock
);
520 spin_lock_bh(&pmc
->lock
);
521 if (pmc
->sfcount
[MCAST_EXCLUDE
])
522 type
= IGMPV3_MODE_IS_EXCLUDE
;
524 type
= IGMPV3_MODE_IS_INCLUDE
;
525 skb
= add_grec(skb
, pmc
, type
, 0, 0);
526 spin_unlock_bh(&pmc
->lock
);
530 return igmpv3_sendpack(skb
);
534 * remove zero-count source records from a source filter list
536 static void igmpv3_clear_zeros(struct ip_sf_list
**ppsf
)
538 struct ip_sf_list
*psf_prev
, *psf_next
, *psf
;
541 for (psf
=*ppsf
; psf
; psf
= psf_next
) {
542 psf_next
= psf
->sf_next
;
543 if (psf
->sf_crcount
== 0) {
545 psf_prev
->sf_next
= psf
->sf_next
;
547 *ppsf
= psf
->sf_next
;
554 static void igmpv3_send_cr(struct in_device
*in_dev
)
556 struct ip_mc_list
*pmc
, *pmc_prev
, *pmc_next
;
557 struct sk_buff
*skb
= NULL
;
560 read_lock(&in_dev
->mc_list_lock
);
561 spin_lock_bh(&in_dev
->mc_tomb_lock
);
565 for (pmc
=in_dev
->mc_tomb
; pmc
; pmc
=pmc_next
) {
566 pmc_next
= pmc
->next
;
567 if (pmc
->sfmode
== MCAST_INCLUDE
) {
568 type
= IGMPV3_BLOCK_OLD_SOURCES
;
569 dtype
= IGMPV3_BLOCK_OLD_SOURCES
;
570 skb
= add_grec(skb
, pmc
, type
, 1, 0);
571 skb
= add_grec(skb
, pmc
, dtype
, 1, 1);
574 if (pmc
->sfmode
== MCAST_EXCLUDE
) {
575 type
= IGMPV3_CHANGE_TO_INCLUDE
;
576 skb
= add_grec(skb
, pmc
, type
, 1, 0);
579 if (pmc
->crcount
== 0) {
580 igmpv3_clear_zeros(&pmc
->tomb
);
581 igmpv3_clear_zeros(&pmc
->sources
);
584 if (pmc
->crcount
== 0 && !pmc
->tomb
&& !pmc
->sources
) {
586 pmc_prev
->next
= pmc_next
;
588 in_dev
->mc_tomb
= pmc_next
;
589 in_dev_put(pmc
->interface
);
594 spin_unlock_bh(&in_dev
->mc_tomb_lock
);
597 for (pmc
=in_dev
->mc_list
; pmc
; pmc
=pmc
->next
) {
598 spin_lock_bh(&pmc
->lock
);
599 if (pmc
->sfcount
[MCAST_EXCLUDE
]) {
600 type
= IGMPV3_BLOCK_OLD_SOURCES
;
601 dtype
= IGMPV3_ALLOW_NEW_SOURCES
;
603 type
= IGMPV3_ALLOW_NEW_SOURCES
;
604 dtype
= IGMPV3_BLOCK_OLD_SOURCES
;
606 skb
= add_grec(skb
, pmc
, type
, 0, 0);
607 skb
= add_grec(skb
, pmc
, dtype
, 0, 1); /* deleted sources */
609 /* filter mode changes */
611 if (pmc
->sfmode
== MCAST_EXCLUDE
)
612 type
= IGMPV3_CHANGE_TO_EXCLUDE
;
614 type
= IGMPV3_CHANGE_TO_INCLUDE
;
615 skb
= add_grec(skb
, pmc
, type
, 0, 0);
618 spin_unlock_bh(&pmc
->lock
);
620 read_unlock(&in_dev
->mc_list_lock
);
624 (void) igmpv3_sendpack(skb
);
627 static int igmp_send_report(struct in_device
*in_dev
, struct ip_mc_list
*pmc
,
634 struct net_device
*dev
= in_dev
->dev
;
635 __be32 group
= pmc
? pmc
->multiaddr
: 0;
638 if (type
== IGMPV3_HOST_MEMBERSHIP_REPORT
)
639 return igmpv3_send_report(in_dev
, pmc
);
640 else if (type
== IGMP_HOST_LEAVE_MESSAGE
)
641 dst
= IGMP_ALL_ROUTER
;
646 struct flowi fl
= { .oif
= dev
->ifindex
,
647 .nl_u
= { .ip4_u
= { .daddr
= dst
} },
648 .proto
= IPPROTO_IGMP
};
649 if (ip_route_output_key(&rt
, &fl
))
652 if (rt
->rt_src
== 0) {
657 skb
=alloc_skb(IGMP_SIZE
+LL_RESERVED_SPACE(dev
), GFP_ATOMIC
);
663 skb
->dst
= &rt
->u
.dst
;
665 skb_reserve(skb
, LL_RESERVED_SPACE(dev
));
667 skb
->nh
.iph
= iph
= (struct iphdr
*)skb_put(skb
, sizeof(struct iphdr
)+4);
670 iph
->ihl
= (sizeof(struct iphdr
)+4)>>2;
672 iph
->frag_off
= htons(IP_DF
);
675 iph
->saddr
= rt
->rt_src
;
676 iph
->protocol
= IPPROTO_IGMP
;
677 iph
->tot_len
= htons(IGMP_SIZE
);
678 ip_select_ident(iph
, &rt
->u
.dst
, NULL
);
679 ((u8
*)&iph
[1])[0] = IPOPT_RA
;
680 ((u8
*)&iph
[1])[1] = 4;
681 ((u8
*)&iph
[1])[2] = 0;
682 ((u8
*)&iph
[1])[3] = 0;
685 ih
= (struct igmphdr
*)skb_put(skb
, sizeof(struct igmphdr
));
690 ih
->csum
=ip_compute_csum((void *)ih
, sizeof(struct igmphdr
));
692 return NF_HOOK(PF_INET
, NF_IP_LOCAL_OUT
, skb
, NULL
, rt
->u
.dst
.dev
,
696 static void igmp_gq_timer_expire(unsigned long data
)
698 struct in_device
*in_dev
= (struct in_device
*)data
;
700 in_dev
->mr_gq_running
= 0;
701 igmpv3_send_report(in_dev
, NULL
);
702 __in_dev_put(in_dev
);
705 static void igmp_ifc_timer_expire(unsigned long data
)
707 struct in_device
*in_dev
= (struct in_device
*)data
;
709 igmpv3_send_cr(in_dev
);
710 if (in_dev
->mr_ifc_count
) {
711 in_dev
->mr_ifc_count
--;
712 igmp_ifc_start_timer(in_dev
, IGMP_Unsolicited_Report_Interval
);
714 __in_dev_put(in_dev
);
717 static void igmp_ifc_event(struct in_device
*in_dev
)
719 if (IGMP_V1_SEEN(in_dev
) || IGMP_V2_SEEN(in_dev
))
721 in_dev
->mr_ifc_count
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
722 IGMP_Unsolicited_Report_Count
;
723 igmp_ifc_start_timer(in_dev
, 1);
727 static void igmp_timer_expire(unsigned long data
)
729 struct ip_mc_list
*im
=(struct ip_mc_list
*)data
;
730 struct in_device
*in_dev
= im
->interface
;
732 spin_lock(&im
->lock
);
735 if (im
->unsolicit_count
) {
736 im
->unsolicit_count
--;
737 igmp_start_timer(im
, IGMP_Unsolicited_Report_Interval
);
740 spin_unlock(&im
->lock
);
742 if (IGMP_V1_SEEN(in_dev
))
743 igmp_send_report(in_dev
, im
, IGMP_HOST_MEMBERSHIP_REPORT
);
744 else if (IGMP_V2_SEEN(in_dev
))
745 igmp_send_report(in_dev
, im
, IGMPV2_HOST_MEMBERSHIP_REPORT
);
747 igmp_send_report(in_dev
, im
, IGMPV3_HOST_MEMBERSHIP_REPORT
);
752 /* mark EXCLUDE-mode sources */
753 static int igmp_xmarksources(struct ip_mc_list
*pmc
, int nsrcs
, __be32
*srcs
)
755 struct ip_sf_list
*psf
;
759 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
762 for (i
=0; i
<nsrcs
; i
++) {
763 /* skip inactive filters */
764 if (pmc
->sfcount
[MCAST_INCLUDE
] ||
765 pmc
->sfcount
[MCAST_EXCLUDE
] !=
766 psf
->sf_count
[MCAST_EXCLUDE
])
768 if (srcs
[i
] == psf
->sf_inaddr
) {
775 if (scount
== nsrcs
) /* all sources excluded */
780 static int igmp_marksources(struct ip_mc_list
*pmc
, int nsrcs
, __be32
*srcs
)
782 struct ip_sf_list
*psf
;
785 if (pmc
->sfmode
== MCAST_EXCLUDE
)
786 return igmp_xmarksources(pmc
, nsrcs
, srcs
);
788 /* mark INCLUDE-mode sources */
790 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
793 for (i
=0; i
<nsrcs
; i
++)
794 if (srcs
[i
] == psf
->sf_inaddr
) {
808 static void igmp_heard_report(struct in_device
*in_dev
, __be32 group
)
810 struct ip_mc_list
*im
;
812 /* Timers are only set for non-local groups */
814 if (group
== IGMP_ALL_HOSTS
)
817 read_lock(&in_dev
->mc_list_lock
);
818 for (im
=in_dev
->mc_list
; im
!=NULL
; im
=im
->next
) {
819 if (im
->multiaddr
== group
) {
824 read_unlock(&in_dev
->mc_list_lock
);
827 static void igmp_heard_query(struct in_device
*in_dev
, struct sk_buff
*skb
,
830 struct igmphdr
*ih
= skb
->h
.igmph
;
831 struct igmpv3_query
*ih3
= (struct igmpv3_query
*)ih
;
832 struct ip_mc_list
*im
;
833 __be32 group
= ih
->group
;
840 /* Alas, old v1 router presents here. */
842 max_delay
= IGMP_Query_Response_Interval
;
843 in_dev
->mr_v1_seen
= jiffies
+
844 IGMP_V1_Router_Present_Timeout
;
847 /* v2 router present */
848 max_delay
= ih
->code
*(HZ
/IGMP_TIMER_SCALE
);
849 in_dev
->mr_v2_seen
= jiffies
+
850 IGMP_V2_Router_Present_Timeout
;
852 /* cancel the interface change timer */
853 in_dev
->mr_ifc_count
= 0;
854 if (del_timer(&in_dev
->mr_ifc_timer
))
855 __in_dev_put(in_dev
);
856 /* clear deleted report items */
857 igmpv3_clear_delrec(in_dev
);
858 } else if (len
< 12) {
859 return; /* ignore bogus packet; freed by caller */
861 if (!pskb_may_pull(skb
, sizeof(struct igmpv3_query
)))
864 ih3
= (struct igmpv3_query
*) skb
->h
.raw
;
866 if (!pskb_may_pull(skb
, sizeof(struct igmpv3_query
)
867 + ntohs(ih3
->nsrcs
)*sizeof(__be32
)))
869 ih3
= (struct igmpv3_query
*) skb
->h
.raw
;
872 max_delay
= IGMPV3_MRC(ih3
->code
)*(HZ
/IGMP_TIMER_SCALE
);
874 max_delay
= 1; /* can't mod w/ 0 */
875 in_dev
->mr_maxdelay
= max_delay
;
877 in_dev
->mr_qrv
= ih3
->qrv
;
878 if (!group
) { /* general query */
880 return; /* no sources allowed */
881 igmp_gq_start_timer(in_dev
);
884 /* mark sources to include, if group & source-specific */
885 mark
= ih3
->nsrcs
!= 0;
889 * - Start the timers in all of our membership records
890 * that the query applies to for the interface on
891 * which the query arrived excl. those that belong
892 * to a "local" group (224.0.0.X)
893 * - For timers already running check if they need to
895 * - Use the igmp->igmp_code field as the maximum
898 read_lock(&in_dev
->mc_list_lock
);
899 for (im
=in_dev
->mc_list
; im
!=NULL
; im
=im
->next
) {
902 if (group
&& group
!= im
->multiaddr
)
904 if (im
->multiaddr
== IGMP_ALL_HOSTS
)
906 spin_lock_bh(&im
->lock
);
908 im
->gsquery
= im
->gsquery
&& mark
;
911 changed
= !im
->gsquery
||
912 igmp_marksources(im
, ntohs(ih3
->nsrcs
), ih3
->srcs
);
913 spin_unlock_bh(&im
->lock
);
915 igmp_mod_timer(im
, max_delay
);
917 read_unlock(&in_dev
->mc_list_lock
);
920 int igmp_rcv(struct sk_buff
*skb
)
922 /* This basically follows the spec line by line -- see RFC1112 */
924 struct in_device
*in_dev
= in_dev_get(skb
->dev
);
932 if (!pskb_may_pull(skb
, sizeof(struct igmphdr
)))
935 switch (skb
->ip_summed
) {
936 case CHECKSUM_COMPLETE
:
937 if (!csum_fold(skb
->csum
))
942 if (__skb_checksum_complete(skb
))
948 case IGMP_HOST_MEMBERSHIP_QUERY
:
949 igmp_heard_query(in_dev
, skb
, len
);
951 case IGMP_HOST_MEMBERSHIP_REPORT
:
952 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
953 case IGMPV3_HOST_MEMBERSHIP_REPORT
:
954 /* Is it our report looped back? */
955 if (((struct rtable
*)skb
->dst
)->fl
.iif
== 0)
957 /* don't rely on MC router hearing unicast reports */
958 if (skb
->pkt_type
== PACKET_MULTICAST
||
959 skb
->pkt_type
== PACKET_BROADCAST
)
960 igmp_heard_report(in_dev
, ih
->group
);
963 #ifdef CONFIG_IP_PIMSM_V1
965 return pim_rcv_v1(skb
);
969 case IGMP_HOST_LEAVE_MESSAGE
:
971 case IGMP_MTRACE_RESP
:
987 * Add a filter to a device
990 static void ip_mc_filter_add(struct in_device
*in_dev
, __be32 addr
)
992 char buf
[MAX_ADDR_LEN
];
993 struct net_device
*dev
= in_dev
->dev
;
995 /* Checking for IFF_MULTICAST here is WRONG-WRONG-WRONG.
996 We will get multicast token leakage, when IFF_MULTICAST
997 is changed. This check should be done in dev->set_multicast_list
998 routine. Something sort of:
999 if (dev->mc_list && dev->flags&IFF_MULTICAST) { do it; }
1002 if (arp_mc_map(addr
, buf
, dev
, 0) == 0)
1003 dev_mc_add(dev
,buf
,dev
->addr_len
,0);
1007 * Remove a filter from a device
1010 static void ip_mc_filter_del(struct in_device
*in_dev
, __be32 addr
)
1012 char buf
[MAX_ADDR_LEN
];
1013 struct net_device
*dev
= in_dev
->dev
;
1015 if (arp_mc_map(addr
, buf
, dev
, 0) == 0)
1016 dev_mc_delete(dev
,buf
,dev
->addr_len
,0);
1019 #ifdef CONFIG_IP_MULTICAST
1021 * deleted ip_mc_list manipulation
1023 static void igmpv3_add_delrec(struct in_device
*in_dev
, struct ip_mc_list
*im
)
1025 struct ip_mc_list
*pmc
;
1027 /* this is an "ip_mc_list" for convenience; only the fields below
1028 * are actually used. In particular, the refcnt and users are not
1029 * used for management of the delete list. Using the same structure
1030 * for deleted items allows change reports to use common code with
1031 * non-deleted or query-response MCA's.
1033 pmc
= kzalloc(sizeof(*pmc
), GFP_KERNEL
);
1036 spin_lock_bh(&im
->lock
);
1037 pmc
->interface
= im
->interface
;
1038 in_dev_hold(in_dev
);
1039 pmc
->multiaddr
= im
->multiaddr
;
1040 pmc
->crcount
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
1041 IGMP_Unsolicited_Report_Count
;
1042 pmc
->sfmode
= im
->sfmode
;
1043 if (pmc
->sfmode
== MCAST_INCLUDE
) {
1044 struct ip_sf_list
*psf
;
1046 pmc
->tomb
= im
->tomb
;
1047 pmc
->sources
= im
->sources
;
1048 im
->tomb
= im
->sources
= NULL
;
1049 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
)
1050 psf
->sf_crcount
= pmc
->crcount
;
1052 spin_unlock_bh(&im
->lock
);
1054 spin_lock_bh(&in_dev
->mc_tomb_lock
);
1055 pmc
->next
= in_dev
->mc_tomb
;
1056 in_dev
->mc_tomb
= pmc
;
1057 spin_unlock_bh(&in_dev
->mc_tomb_lock
);
1060 static void igmpv3_del_delrec(struct in_device
*in_dev
, __be32 multiaddr
)
1062 struct ip_mc_list
*pmc
, *pmc_prev
;
1063 struct ip_sf_list
*psf
, *psf_next
;
1065 spin_lock_bh(&in_dev
->mc_tomb_lock
);
1067 for (pmc
=in_dev
->mc_tomb
; pmc
; pmc
=pmc
->next
) {
1068 if (pmc
->multiaddr
== multiaddr
)
1074 pmc_prev
->next
= pmc
->next
;
1076 in_dev
->mc_tomb
= pmc
->next
;
1078 spin_unlock_bh(&in_dev
->mc_tomb_lock
);
1080 for (psf
=pmc
->tomb
; psf
; psf
=psf_next
) {
1081 psf_next
= psf
->sf_next
;
1084 in_dev_put(pmc
->interface
);
1089 static void igmpv3_clear_delrec(struct in_device
*in_dev
)
1091 struct ip_mc_list
*pmc
, *nextpmc
;
1093 spin_lock_bh(&in_dev
->mc_tomb_lock
);
1094 pmc
= in_dev
->mc_tomb
;
1095 in_dev
->mc_tomb
= NULL
;
1096 spin_unlock_bh(&in_dev
->mc_tomb_lock
);
1098 for (; pmc
; pmc
= nextpmc
) {
1099 nextpmc
= pmc
->next
;
1100 ip_mc_clear_src(pmc
);
1101 in_dev_put(pmc
->interface
);
1104 /* clear dead sources, too */
1105 read_lock(&in_dev
->mc_list_lock
);
1106 for (pmc
=in_dev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1107 struct ip_sf_list
*psf
, *psf_next
;
1109 spin_lock_bh(&pmc
->lock
);
1112 spin_unlock_bh(&pmc
->lock
);
1113 for (; psf
; psf
=psf_next
) {
1114 psf_next
= psf
->sf_next
;
1118 read_unlock(&in_dev
->mc_list_lock
);
1122 static void igmp_group_dropped(struct ip_mc_list
*im
)
1124 struct in_device
*in_dev
= im
->interface
;
1125 #ifdef CONFIG_IP_MULTICAST
1131 ip_mc_filter_del(in_dev
, im
->multiaddr
);
1134 #ifdef CONFIG_IP_MULTICAST
1135 if (im
->multiaddr
== IGMP_ALL_HOSTS
)
1138 reporter
= im
->reporter
;
1139 igmp_stop_timer(im
);
1141 if (!in_dev
->dead
) {
1142 if (IGMP_V1_SEEN(in_dev
))
1144 if (IGMP_V2_SEEN(in_dev
)) {
1146 igmp_send_report(in_dev
, im
, IGMP_HOST_LEAVE_MESSAGE
);
1150 igmpv3_add_delrec(in_dev
, im
);
1152 igmp_ifc_event(in_dev
);
1156 ip_mc_clear_src(im
);
1159 static void igmp_group_added(struct ip_mc_list
*im
)
1161 struct in_device
*in_dev
= im
->interface
;
1163 if (im
->loaded
== 0) {
1165 ip_mc_filter_add(in_dev
, im
->multiaddr
);
1168 #ifdef CONFIG_IP_MULTICAST
1169 if (im
->multiaddr
== IGMP_ALL_HOSTS
)
1174 if (IGMP_V1_SEEN(in_dev
) || IGMP_V2_SEEN(in_dev
)) {
1175 spin_lock_bh(&im
->lock
);
1176 igmp_start_timer(im
, IGMP_Initial_Report_Delay
);
1177 spin_unlock_bh(&im
->lock
);
1182 im
->crcount
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
1183 IGMP_Unsolicited_Report_Count
;
1184 igmp_ifc_event(in_dev
);
1190 * Multicast list managers
1195 * A socket has joined a multicast group on device dev.
1198 void ip_mc_inc_group(struct in_device
*in_dev
, __be32 addr
)
1200 struct ip_mc_list
*im
;
1204 for (im
=in_dev
->mc_list
; im
; im
=im
->next
) {
1205 if (im
->multiaddr
== addr
) {
1207 ip_mc_add_src(in_dev
, &addr
, MCAST_EXCLUDE
, 0, NULL
, 0);
1212 im
= kmalloc(sizeof(*im
), GFP_KERNEL
);
1217 im
->interface
=in_dev
;
1218 in_dev_hold(in_dev
);
1220 /* initial mode is (EX, empty) */
1221 im
->sfmode
= MCAST_EXCLUDE
;
1222 im
->sfcount
[MCAST_INCLUDE
] = 0;
1223 im
->sfcount
[MCAST_EXCLUDE
] = 1;
1227 atomic_set(&im
->refcnt
, 1);
1228 spin_lock_init(&im
->lock
);
1229 #ifdef CONFIG_IP_MULTICAST
1231 init_timer(&im
->timer
);
1232 im
->timer
.data
=(unsigned long)im
;
1233 im
->timer
.function
=&igmp_timer_expire
;
1234 im
->unsolicit_count
= IGMP_Unsolicited_Report_Count
;
1239 write_lock_bh(&in_dev
->mc_list_lock
);
1240 im
->next
=in_dev
->mc_list
;
1242 write_unlock_bh(&in_dev
->mc_list_lock
);
1243 #ifdef CONFIG_IP_MULTICAST
1244 igmpv3_del_delrec(in_dev
, im
->multiaddr
);
1246 igmp_group_added(im
);
1248 ip_rt_multicast_event(in_dev
);
1254 * A socket has left a multicast group on device dev
1257 void ip_mc_dec_group(struct in_device
*in_dev
, __be32 addr
)
1259 struct ip_mc_list
*i
, **ip
;
1263 for (ip
=&in_dev
->mc_list
; (i
=*ip
)!=NULL
; ip
=&i
->next
) {
1264 if (i
->multiaddr
==addr
) {
1265 if (--i
->users
== 0) {
1266 write_lock_bh(&in_dev
->mc_list_lock
);
1268 write_unlock_bh(&in_dev
->mc_list_lock
);
1269 igmp_group_dropped(i
);
1272 ip_rt_multicast_event(in_dev
);
1282 /* Device going down */
1284 void ip_mc_down(struct in_device
*in_dev
)
1286 struct ip_mc_list
*i
;
1290 for (i
=in_dev
->mc_list
; i
; i
=i
->next
)
1291 igmp_group_dropped(i
);
1293 #ifdef CONFIG_IP_MULTICAST
1294 in_dev
->mr_ifc_count
= 0;
1295 if (del_timer(&in_dev
->mr_ifc_timer
))
1296 __in_dev_put(in_dev
);
1297 in_dev
->mr_gq_running
= 0;
1298 if (del_timer(&in_dev
->mr_gq_timer
))
1299 __in_dev_put(in_dev
);
1300 igmpv3_clear_delrec(in_dev
);
1303 ip_mc_dec_group(in_dev
, IGMP_ALL_HOSTS
);
1306 void ip_mc_init_dev(struct in_device
*in_dev
)
1310 in_dev
->mc_tomb
= NULL
;
1311 #ifdef CONFIG_IP_MULTICAST
1312 in_dev
->mr_gq_running
= 0;
1313 init_timer(&in_dev
->mr_gq_timer
);
1314 in_dev
->mr_gq_timer
.data
=(unsigned long) in_dev
;
1315 in_dev
->mr_gq_timer
.function
=&igmp_gq_timer_expire
;
1316 in_dev
->mr_ifc_count
= 0;
1317 init_timer(&in_dev
->mr_ifc_timer
);
1318 in_dev
->mr_ifc_timer
.data
=(unsigned long) in_dev
;
1319 in_dev
->mr_ifc_timer
.function
=&igmp_ifc_timer_expire
;
1320 in_dev
->mr_qrv
= IGMP_Unsolicited_Report_Count
;
1323 rwlock_init(&in_dev
->mc_list_lock
);
1324 spin_lock_init(&in_dev
->mc_tomb_lock
);
1327 /* Device going up */
1329 void ip_mc_up(struct in_device
*in_dev
)
1331 struct ip_mc_list
*i
;
1335 ip_mc_inc_group(in_dev
, IGMP_ALL_HOSTS
);
1337 for (i
=in_dev
->mc_list
; i
; i
=i
->next
)
1338 igmp_group_added(i
);
1342 * Device is about to be destroyed: clean up.
1345 void ip_mc_destroy_dev(struct in_device
*in_dev
)
1347 struct ip_mc_list
*i
;
1351 /* Deactivate timers */
1354 write_lock_bh(&in_dev
->mc_list_lock
);
1355 while ((i
= in_dev
->mc_list
) != NULL
) {
1356 in_dev
->mc_list
= i
->next
;
1357 write_unlock_bh(&in_dev
->mc_list_lock
);
1359 igmp_group_dropped(i
);
1362 write_lock_bh(&in_dev
->mc_list_lock
);
1364 write_unlock_bh(&in_dev
->mc_list_lock
);
1367 static struct in_device
* ip_mc_find_dev(struct ip_mreqn
*imr
)
1369 struct flowi fl
= { .nl_u
= { .ip4_u
=
1370 { .daddr
= imr
->imr_multiaddr
.s_addr
} } };
1372 struct net_device
*dev
= NULL
;
1373 struct in_device
*idev
= NULL
;
1375 if (imr
->imr_ifindex
) {
1376 idev
= inetdev_by_index(imr
->imr_ifindex
);
1381 if (imr
->imr_address
.s_addr
) {
1382 dev
= ip_dev_find(imr
->imr_address
.s_addr
);
1388 if (!dev
&& !ip_route_output_key(&rt
, &fl
)) {
1389 dev
= rt
->u
.dst
.dev
;
1393 imr
->imr_ifindex
= dev
->ifindex
;
1394 idev
= __in_dev_get_rtnl(dev
);
1400 * Join a socket to a group
1402 int sysctl_igmp_max_memberships __read_mostly
= IP_MAX_MEMBERSHIPS
;
1403 int sysctl_igmp_max_msf __read_mostly
= IP_MAX_MSF
;
1406 static int ip_mc_del1_src(struct ip_mc_list
*pmc
, int sfmode
,
1409 struct ip_sf_list
*psf
, *psf_prev
;
1413 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
1414 if (psf
->sf_inaddr
== *psfsrc
)
1418 if (!psf
|| psf
->sf_count
[sfmode
] == 0) {
1419 /* source filter not found, or count wrong => bug */
1422 psf
->sf_count
[sfmode
]--;
1423 if (psf
->sf_count
[sfmode
] == 0) {
1424 ip_rt_multicast_event(pmc
->interface
);
1426 if (!psf
->sf_count
[MCAST_INCLUDE
] && !psf
->sf_count
[MCAST_EXCLUDE
]) {
1427 #ifdef CONFIG_IP_MULTICAST
1428 struct in_device
*in_dev
= pmc
->interface
;
1431 /* no more filters for this source */
1433 psf_prev
->sf_next
= psf
->sf_next
;
1435 pmc
->sources
= psf
->sf_next
;
1436 #ifdef CONFIG_IP_MULTICAST
1437 if (psf
->sf_oldin
&&
1438 !IGMP_V1_SEEN(in_dev
) && !IGMP_V2_SEEN(in_dev
)) {
1439 psf
->sf_crcount
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
1440 IGMP_Unsolicited_Report_Count
;
1441 psf
->sf_next
= pmc
->tomb
;
1451 #ifndef CONFIG_IP_MULTICAST
1452 #define igmp_ifc_event(x) do { } while (0)
1455 static int ip_mc_del_src(struct in_device
*in_dev
, __be32
*pmca
, int sfmode
,
1456 int sfcount
, __be32
*psfsrc
, int delta
)
1458 struct ip_mc_list
*pmc
;
1464 read_lock(&in_dev
->mc_list_lock
);
1465 for (pmc
=in_dev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1466 if (*pmca
== pmc
->multiaddr
)
1470 /* MCA not found?? bug */
1471 read_unlock(&in_dev
->mc_list_lock
);
1474 spin_lock_bh(&pmc
->lock
);
1475 read_unlock(&in_dev
->mc_list_lock
);
1476 #ifdef CONFIG_IP_MULTICAST
1481 if (!pmc
->sfcount
[sfmode
])
1483 pmc
->sfcount
[sfmode
]--;
1486 for (i
=0; i
<sfcount
; i
++) {
1487 int rv
= ip_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
1489 changerec
|= rv
> 0;
1493 if (pmc
->sfmode
== MCAST_EXCLUDE
&&
1494 pmc
->sfcount
[MCAST_EXCLUDE
] == 0 &&
1495 pmc
->sfcount
[MCAST_INCLUDE
]) {
1496 #ifdef CONFIG_IP_MULTICAST
1497 struct ip_sf_list
*psf
;
1500 /* filter mode change */
1501 pmc
->sfmode
= MCAST_INCLUDE
;
1502 #ifdef CONFIG_IP_MULTICAST
1503 pmc
->crcount
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
1504 IGMP_Unsolicited_Report_Count
;
1505 in_dev
->mr_ifc_count
= pmc
->crcount
;
1506 for (psf
=pmc
->sources
; psf
; psf
= psf
->sf_next
)
1507 psf
->sf_crcount
= 0;
1508 igmp_ifc_event(pmc
->interface
);
1509 } else if (sf_setstate(pmc
) || changerec
) {
1510 igmp_ifc_event(pmc
->interface
);
1514 spin_unlock_bh(&pmc
->lock
);
1519 * Add multicast single-source filter to the interface list
1521 static int ip_mc_add1_src(struct ip_mc_list
*pmc
, int sfmode
,
1522 __be32
*psfsrc
, int delta
)
1524 struct ip_sf_list
*psf
, *psf_prev
;
1527 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
1528 if (psf
->sf_inaddr
== *psfsrc
)
1533 psf
= kzalloc(sizeof(*psf
), GFP_ATOMIC
);
1536 psf
->sf_inaddr
= *psfsrc
;
1538 psf_prev
->sf_next
= psf
;
1542 psf
->sf_count
[sfmode
]++;
1543 if (psf
->sf_count
[sfmode
] == 1) {
1544 ip_rt_multicast_event(pmc
->interface
);
1549 #ifdef CONFIG_IP_MULTICAST
1550 static void sf_markstate(struct ip_mc_list
*pmc
)
1552 struct ip_sf_list
*psf
;
1553 int mca_xcount
= pmc
->sfcount
[MCAST_EXCLUDE
];
1555 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
)
1556 if (pmc
->sfcount
[MCAST_EXCLUDE
]) {
1557 psf
->sf_oldin
= mca_xcount
==
1558 psf
->sf_count
[MCAST_EXCLUDE
] &&
1559 !psf
->sf_count
[MCAST_INCLUDE
];
1561 psf
->sf_oldin
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
1564 static int sf_setstate(struct ip_mc_list
*pmc
)
1566 struct ip_sf_list
*psf
, *dpsf
;
1567 int mca_xcount
= pmc
->sfcount
[MCAST_EXCLUDE
];
1568 int qrv
= pmc
->interface
->mr_qrv
;
1572 for (psf
=pmc
->sources
; psf
; psf
=psf
->sf_next
) {
1573 if (pmc
->sfcount
[MCAST_EXCLUDE
]) {
1574 new_in
= mca_xcount
== psf
->sf_count
[MCAST_EXCLUDE
] &&
1575 !psf
->sf_count
[MCAST_INCLUDE
];
1577 new_in
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
1579 if (!psf
->sf_oldin
) {
1580 struct ip_sf_list
*prev
= NULL
;
1582 for (dpsf
=pmc
->tomb
; dpsf
; dpsf
=dpsf
->sf_next
) {
1583 if (dpsf
->sf_inaddr
== psf
->sf_inaddr
)
1589 prev
->sf_next
= dpsf
->sf_next
;
1591 pmc
->tomb
= dpsf
->sf_next
;
1594 psf
->sf_crcount
= qrv
;
1597 } else if (psf
->sf_oldin
) {
1599 psf
->sf_crcount
= 0;
1601 * add or update "delete" records if an active filter
1604 for (dpsf
=pmc
->tomb
; dpsf
; dpsf
=dpsf
->sf_next
)
1605 if (dpsf
->sf_inaddr
== psf
->sf_inaddr
)
1608 dpsf
= (struct ip_sf_list
*)
1609 kmalloc(sizeof(*dpsf
), GFP_ATOMIC
);
1613 /* pmc->lock held by callers */
1614 dpsf
->sf_next
= pmc
->tomb
;
1617 dpsf
->sf_crcount
= qrv
;
1626 * Add multicast source filter list to the interface list
1628 static int ip_mc_add_src(struct in_device
*in_dev
, __be32
*pmca
, int sfmode
,
1629 int sfcount
, __be32
*psfsrc
, int delta
)
1631 struct ip_mc_list
*pmc
;
1637 read_lock(&in_dev
->mc_list_lock
);
1638 for (pmc
=in_dev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1639 if (*pmca
== pmc
->multiaddr
)
1643 /* MCA not found?? bug */
1644 read_unlock(&in_dev
->mc_list_lock
);
1647 spin_lock_bh(&pmc
->lock
);
1648 read_unlock(&in_dev
->mc_list_lock
);
1650 #ifdef CONFIG_IP_MULTICAST
1653 isexclude
= pmc
->sfmode
== MCAST_EXCLUDE
;
1655 pmc
->sfcount
[sfmode
]++;
1657 for (i
=0; i
<sfcount
; i
++) {
1658 err
= ip_mc_add1_src(pmc
, sfmode
, &psfsrc
[i
], delta
);
1665 pmc
->sfcount
[sfmode
]--;
1667 (void) ip_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
1668 } else if (isexclude
!= (pmc
->sfcount
[MCAST_EXCLUDE
] != 0)) {
1669 #ifdef CONFIG_IP_MULTICAST
1670 struct in_device
*in_dev
= pmc
->interface
;
1671 struct ip_sf_list
*psf
;
1674 /* filter mode change */
1675 if (pmc
->sfcount
[MCAST_EXCLUDE
])
1676 pmc
->sfmode
= MCAST_EXCLUDE
;
1677 else if (pmc
->sfcount
[MCAST_INCLUDE
])
1678 pmc
->sfmode
= MCAST_INCLUDE
;
1679 #ifdef CONFIG_IP_MULTICAST
1680 /* else no filters; keep old mode for reports */
1682 pmc
->crcount
= in_dev
->mr_qrv
? in_dev
->mr_qrv
:
1683 IGMP_Unsolicited_Report_Count
;
1684 in_dev
->mr_ifc_count
= pmc
->crcount
;
1685 for (psf
=pmc
->sources
; psf
; psf
= psf
->sf_next
)
1686 psf
->sf_crcount
= 0;
1687 igmp_ifc_event(in_dev
);
1688 } else if (sf_setstate(pmc
)) {
1689 igmp_ifc_event(in_dev
);
1692 spin_unlock_bh(&pmc
->lock
);
1696 static void ip_mc_clear_src(struct ip_mc_list
*pmc
)
1698 struct ip_sf_list
*psf
, *nextpsf
;
1700 for (psf
=pmc
->tomb
; psf
; psf
=nextpsf
) {
1701 nextpsf
= psf
->sf_next
;
1705 for (psf
=pmc
->sources
; psf
; psf
=nextpsf
) {
1706 nextpsf
= psf
->sf_next
;
1709 pmc
->sources
= NULL
;
1710 pmc
->sfmode
= MCAST_EXCLUDE
;
1711 pmc
->sfcount
[MCAST_INCLUDE
] = 0;
1712 pmc
->sfcount
[MCAST_EXCLUDE
] = 1;
1717 * Join a multicast group
1719 int ip_mc_join_group(struct sock
*sk
, struct ip_mreqn
*imr
)
1722 __be32 addr
= imr
->imr_multiaddr
.s_addr
;
1723 struct ip_mc_socklist
*iml
=NULL
, *i
;
1724 struct in_device
*in_dev
;
1725 struct inet_sock
*inet
= inet_sk(sk
);
1729 if (!MULTICAST(addr
))
1734 in_dev
= ip_mc_find_dev(imr
);
1743 ifindex
= imr
->imr_ifindex
;
1744 for (i
= inet
->mc_list
; i
; i
= i
->next
) {
1745 if (i
->multi
.imr_multiaddr
.s_addr
== addr
&&
1746 i
->multi
.imr_ifindex
== ifindex
)
1751 if (count
>= sysctl_igmp_max_memberships
)
1753 iml
= sock_kmalloc(sk
,sizeof(*iml
),GFP_KERNEL
);
1757 memcpy(&iml
->multi
, imr
, sizeof(*imr
));
1758 iml
->next
= inet
->mc_list
;
1760 iml
->sfmode
= MCAST_EXCLUDE
;
1761 inet
->mc_list
= iml
;
1762 ip_mc_inc_group(in_dev
, addr
);
1769 static int ip_mc_leave_src(struct sock
*sk
, struct ip_mc_socklist
*iml
,
1770 struct in_device
*in_dev
)
1774 if (iml
->sflist
== 0) {
1775 /* any-source empty exclude case */
1776 return ip_mc_del_src(in_dev
, &iml
->multi
.imr_multiaddr
.s_addr
,
1777 iml
->sfmode
, 0, NULL
, 0);
1779 err
= ip_mc_del_src(in_dev
, &iml
->multi
.imr_multiaddr
.s_addr
,
1780 iml
->sfmode
, iml
->sflist
->sl_count
,
1781 iml
->sflist
->sl_addr
, 0);
1782 sock_kfree_s(sk
, iml
->sflist
, IP_SFLSIZE(iml
->sflist
->sl_max
));
1788 * Ask a socket to leave a group.
1791 int ip_mc_leave_group(struct sock
*sk
, struct ip_mreqn
*imr
)
1793 struct inet_sock
*inet
= inet_sk(sk
);
1794 struct ip_mc_socklist
*iml
, **imlp
;
1795 struct in_device
*in_dev
;
1796 __be32 group
= imr
->imr_multiaddr
.s_addr
;
1798 int ret
= -EADDRNOTAVAIL
;
1801 in_dev
= ip_mc_find_dev(imr
);
1802 ifindex
= imr
->imr_ifindex
;
1803 for (imlp
= &inet
->mc_list
; (iml
= *imlp
) != NULL
; imlp
= &iml
->next
) {
1804 if (iml
->multi
.imr_multiaddr
.s_addr
!= group
)
1807 if (iml
->multi
.imr_ifindex
!= ifindex
)
1809 } else if (imr
->imr_address
.s_addr
&& imr
->imr_address
.s_addr
!=
1810 iml
->multi
.imr_address
.s_addr
)
1813 (void) ip_mc_leave_src(sk
, iml
, in_dev
);
1818 ip_mc_dec_group(in_dev
, group
);
1820 sock_kfree_s(sk
, iml
, sizeof(*iml
));
1829 int ip_mc_source(int add
, int omode
, struct sock
*sk
, struct
1830 ip_mreq_source
*mreqs
, int ifindex
)
1833 struct ip_mreqn imr
;
1834 __be32 addr
= mreqs
->imr_multiaddr
;
1835 struct ip_mc_socklist
*pmc
;
1836 struct in_device
*in_dev
= NULL
;
1837 struct inet_sock
*inet
= inet_sk(sk
);
1838 struct ip_sf_socklist
*psl
;
1842 if (!MULTICAST(addr
))
1847 imr
.imr_multiaddr
.s_addr
= mreqs
->imr_multiaddr
;
1848 imr
.imr_address
.s_addr
= mreqs
->imr_interface
;
1849 imr
.imr_ifindex
= ifindex
;
1850 in_dev
= ip_mc_find_dev(&imr
);
1856 err
= -EADDRNOTAVAIL
;
1858 for (pmc
=inet
->mc_list
; pmc
; pmc
=pmc
->next
) {
1859 if (pmc
->multi
.imr_multiaddr
.s_addr
== imr
.imr_multiaddr
.s_addr
1860 && pmc
->multi
.imr_ifindex
== imr
.imr_ifindex
)
1863 if (!pmc
) { /* must have a prior join */
1867 /* if a source filter was set, must be the same mode as before */
1869 if (pmc
->sfmode
!= omode
) {
1873 } else if (pmc
->sfmode
!= omode
) {
1874 /* allow mode switches for empty-set filters */
1875 ip_mc_add_src(in_dev
, &mreqs
->imr_multiaddr
, omode
, 0, NULL
, 0);
1876 ip_mc_del_src(in_dev
, &mreqs
->imr_multiaddr
, pmc
->sfmode
, 0,
1878 pmc
->sfmode
= omode
;
1884 goto done
; /* err = -EADDRNOTAVAIL */
1886 for (i
=0; i
<psl
->sl_count
; i
++) {
1887 rv
= memcmp(&psl
->sl_addr
[i
], &mreqs
->imr_sourceaddr
,
1892 if (rv
) /* source not found */
1893 goto done
; /* err = -EADDRNOTAVAIL */
1895 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
1896 if (psl
->sl_count
== 1 && omode
== MCAST_INCLUDE
) {
1901 /* update the interface filter */
1902 ip_mc_del_src(in_dev
, &mreqs
->imr_multiaddr
, omode
, 1,
1903 &mreqs
->imr_sourceaddr
, 1);
1905 for (j
=i
+1; j
<psl
->sl_count
; j
++)
1906 psl
->sl_addr
[j
-1] = psl
->sl_addr
[j
];
1911 /* else, add a new source to the filter */
1913 if (psl
&& psl
->sl_count
>= sysctl_igmp_max_msf
) {
1917 if (!psl
|| psl
->sl_count
== psl
->sl_max
) {
1918 struct ip_sf_socklist
*newpsl
;
1919 int count
= IP_SFBLOCK
;
1922 count
+= psl
->sl_max
;
1923 newpsl
= sock_kmalloc(sk
, IP_SFLSIZE(count
), GFP_KERNEL
);
1928 newpsl
->sl_max
= count
;
1929 newpsl
->sl_count
= count
- IP_SFBLOCK
;
1931 for (i
=0; i
<psl
->sl_count
; i
++)
1932 newpsl
->sl_addr
[i
] = psl
->sl_addr
[i
];
1933 sock_kfree_s(sk
, psl
, IP_SFLSIZE(psl
->sl_max
));
1935 pmc
->sflist
= psl
= newpsl
;
1937 rv
= 1; /* > 0 for insert logic below if sl_count is 0 */
1938 for (i
=0; i
<psl
->sl_count
; i
++) {
1939 rv
= memcmp(&psl
->sl_addr
[i
], &mreqs
->imr_sourceaddr
,
1944 if (rv
== 0) /* address already there is an error */
1946 for (j
=psl
->sl_count
-1; j
>=i
; j
--)
1947 psl
->sl_addr
[j
+1] = psl
->sl_addr
[j
];
1948 psl
->sl_addr
[i
] = mreqs
->imr_sourceaddr
;
1951 /* update the interface list */
1952 ip_mc_add_src(in_dev
, &mreqs
->imr_multiaddr
, omode
, 1,
1953 &mreqs
->imr_sourceaddr
, 1);
1957 return ip_mc_leave_group(sk
, &imr
);
1961 int ip_mc_msfilter(struct sock
*sk
, struct ip_msfilter
*msf
, int ifindex
)
1964 struct ip_mreqn imr
;
1965 __be32 addr
= msf
->imsf_multiaddr
;
1966 struct ip_mc_socklist
*pmc
;
1967 struct in_device
*in_dev
;
1968 struct inet_sock
*inet
= inet_sk(sk
);
1969 struct ip_sf_socklist
*newpsl
, *psl
;
1972 if (!MULTICAST(addr
))
1974 if (msf
->imsf_fmode
!= MCAST_INCLUDE
&&
1975 msf
->imsf_fmode
!= MCAST_EXCLUDE
)
1980 imr
.imr_multiaddr
.s_addr
= msf
->imsf_multiaddr
;
1981 imr
.imr_address
.s_addr
= msf
->imsf_interface
;
1982 imr
.imr_ifindex
= ifindex
;
1983 in_dev
= ip_mc_find_dev(&imr
);
1990 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
1991 if (msf
->imsf_fmode
== MCAST_INCLUDE
&& msf
->imsf_numsrc
== 0) {
1996 for (pmc
=inet
->mc_list
; pmc
; pmc
=pmc
->next
) {
1997 if (pmc
->multi
.imr_multiaddr
.s_addr
== msf
->imsf_multiaddr
&&
1998 pmc
->multi
.imr_ifindex
== imr
.imr_ifindex
)
2001 if (!pmc
) { /* must have a prior join */
2005 if (msf
->imsf_numsrc
) {
2006 newpsl
= sock_kmalloc(sk
, IP_SFLSIZE(msf
->imsf_numsrc
),
2012 newpsl
->sl_max
= newpsl
->sl_count
= msf
->imsf_numsrc
;
2013 memcpy(newpsl
->sl_addr
, msf
->imsf_slist
,
2014 msf
->imsf_numsrc
* sizeof(msf
->imsf_slist
[0]));
2015 err
= ip_mc_add_src(in_dev
, &msf
->imsf_multiaddr
,
2016 msf
->imsf_fmode
, newpsl
->sl_count
, newpsl
->sl_addr
, 0);
2018 sock_kfree_s(sk
, newpsl
, IP_SFLSIZE(newpsl
->sl_max
));
2023 (void) ip_mc_add_src(in_dev
, &msf
->imsf_multiaddr
,
2024 msf
->imsf_fmode
, 0, NULL
, 0);
2028 (void) ip_mc_del_src(in_dev
, &msf
->imsf_multiaddr
, pmc
->sfmode
,
2029 psl
->sl_count
, psl
->sl_addr
, 0);
2030 sock_kfree_s(sk
, psl
, IP_SFLSIZE(psl
->sl_max
));
2032 (void) ip_mc_del_src(in_dev
, &msf
->imsf_multiaddr
, pmc
->sfmode
,
2034 pmc
->sflist
= newpsl
;
2035 pmc
->sfmode
= msf
->imsf_fmode
;
2040 err
= ip_mc_leave_group(sk
, &imr
);
2044 int ip_mc_msfget(struct sock
*sk
, struct ip_msfilter
*msf
,
2045 struct ip_msfilter __user
*optval
, int __user
*optlen
)
2047 int err
, len
, count
, copycount
;
2048 struct ip_mreqn imr
;
2049 __be32 addr
= msf
->imsf_multiaddr
;
2050 struct ip_mc_socklist
*pmc
;
2051 struct in_device
*in_dev
;
2052 struct inet_sock
*inet
= inet_sk(sk
);
2053 struct ip_sf_socklist
*psl
;
2055 if (!MULTICAST(addr
))
2060 imr
.imr_multiaddr
.s_addr
= msf
->imsf_multiaddr
;
2061 imr
.imr_address
.s_addr
= msf
->imsf_interface
;
2062 imr
.imr_ifindex
= 0;
2063 in_dev
= ip_mc_find_dev(&imr
);
2069 err
= -EADDRNOTAVAIL
;
2071 for (pmc
=inet
->mc_list
; pmc
; pmc
=pmc
->next
) {
2072 if (pmc
->multi
.imr_multiaddr
.s_addr
== msf
->imsf_multiaddr
&&
2073 pmc
->multi
.imr_ifindex
== imr
.imr_ifindex
)
2076 if (!pmc
) /* must have a prior join */
2078 msf
->imsf_fmode
= pmc
->sfmode
;
2085 count
= psl
->sl_count
;
2087 copycount
= count
< msf
->imsf_numsrc
? count
: msf
->imsf_numsrc
;
2088 len
= copycount
* sizeof(psl
->sl_addr
[0]);
2089 msf
->imsf_numsrc
= count
;
2090 if (put_user(IP_MSFILTER_SIZE(copycount
), optlen
) ||
2091 copy_to_user(optval
, msf
, IP_MSFILTER_SIZE(0))) {
2095 copy_to_user(&optval
->imsf_slist
[0], psl
->sl_addr
, len
))
2103 int ip_mc_gsfget(struct sock
*sk
, struct group_filter
*gsf
,
2104 struct group_filter __user
*optval
, int __user
*optlen
)
2106 int err
, i
, count
, copycount
;
2107 struct sockaddr_in
*psin
;
2109 struct ip_mc_socklist
*pmc
;
2110 struct inet_sock
*inet
= inet_sk(sk
);
2111 struct ip_sf_socklist
*psl
;
2113 psin
= (struct sockaddr_in
*)&gsf
->gf_group
;
2114 if (psin
->sin_family
!= AF_INET
)
2116 addr
= psin
->sin_addr
.s_addr
;
2117 if (!MULTICAST(addr
))
2122 err
= -EADDRNOTAVAIL
;
2124 for (pmc
=inet
->mc_list
; pmc
; pmc
=pmc
->next
) {
2125 if (pmc
->multi
.imr_multiaddr
.s_addr
== addr
&&
2126 pmc
->multi
.imr_ifindex
== gsf
->gf_interface
)
2129 if (!pmc
) /* must have a prior join */
2131 gsf
->gf_fmode
= pmc
->sfmode
;
2134 count
= psl
? psl
->sl_count
: 0;
2135 copycount
= count
< gsf
->gf_numsrc
? count
: gsf
->gf_numsrc
;
2136 gsf
->gf_numsrc
= count
;
2137 if (put_user(GROUP_FILTER_SIZE(copycount
), optlen
) ||
2138 copy_to_user(optval
, gsf
, GROUP_FILTER_SIZE(0))) {
2141 for (i
=0; i
<copycount
; i
++) {
2142 struct sockaddr_in
*psin
;
2143 struct sockaddr_storage ss
;
2145 psin
= (struct sockaddr_in
*)&ss
;
2146 memset(&ss
, 0, sizeof(ss
));
2147 psin
->sin_family
= AF_INET
;
2148 psin
->sin_addr
.s_addr
= psl
->sl_addr
[i
];
2149 if (copy_to_user(&optval
->gf_slist
[i
], &ss
, sizeof(ss
)))
2159 * check if a multicast source filter allows delivery for a given <src,dst,intf>
2161 int ip_mc_sf_allow(struct sock
*sk
, __be32 loc_addr
, __be32 rmt_addr
, int dif
)
2163 struct inet_sock
*inet
= inet_sk(sk
);
2164 struct ip_mc_socklist
*pmc
;
2165 struct ip_sf_socklist
*psl
;
2168 if (!MULTICAST(loc_addr
))
2171 for (pmc
=inet
->mc_list
; pmc
; pmc
=pmc
->next
) {
2172 if (pmc
->multi
.imr_multiaddr
.s_addr
== loc_addr
&&
2173 pmc
->multi
.imr_ifindex
== dif
)
2180 return pmc
->sfmode
== MCAST_EXCLUDE
;
2182 for (i
=0; i
<psl
->sl_count
; i
++) {
2183 if (psl
->sl_addr
[i
] == rmt_addr
)
2186 if (pmc
->sfmode
== MCAST_INCLUDE
&& i
>= psl
->sl_count
)
2188 if (pmc
->sfmode
== MCAST_EXCLUDE
&& i
< psl
->sl_count
)
2194 * A socket is closing.
2197 void ip_mc_drop_socket(struct sock
*sk
)
2199 struct inet_sock
*inet
= inet_sk(sk
);
2200 struct ip_mc_socklist
*iml
;
2202 if (inet
->mc_list
== NULL
)
2206 while ((iml
= inet
->mc_list
) != NULL
) {
2207 struct in_device
*in_dev
;
2208 inet
->mc_list
= iml
->next
;
2210 in_dev
= inetdev_by_index(iml
->multi
.imr_ifindex
);
2211 (void) ip_mc_leave_src(sk
, iml
, in_dev
);
2212 if (in_dev
!= NULL
) {
2213 ip_mc_dec_group(in_dev
, iml
->multi
.imr_multiaddr
.s_addr
);
2216 sock_kfree_s(sk
, iml
, sizeof(*iml
));
2221 int ip_check_mc(struct in_device
*in_dev
, __be32 mc_addr
, __be32 src_addr
, u16 proto
)
2223 struct ip_mc_list
*im
;
2224 struct ip_sf_list
*psf
;
2227 read_lock(&in_dev
->mc_list_lock
);
2228 for (im
=in_dev
->mc_list
; im
; im
=im
->next
) {
2229 if (im
->multiaddr
== mc_addr
)
2232 if (im
&& proto
== IPPROTO_IGMP
) {
2236 for (psf
=im
->sources
; psf
; psf
=psf
->sf_next
) {
2237 if (psf
->sf_inaddr
== src_addr
)
2241 rv
= psf
->sf_count
[MCAST_INCLUDE
] ||
2242 psf
->sf_count
[MCAST_EXCLUDE
] !=
2243 im
->sfcount
[MCAST_EXCLUDE
];
2245 rv
= im
->sfcount
[MCAST_EXCLUDE
] != 0;
2247 rv
= 1; /* unspecified source; tentatively allow */
2249 read_unlock(&in_dev
->mc_list_lock
);
2253 #if defined(CONFIG_PROC_FS)
2254 struct igmp_mc_iter_state
{
2255 struct net_device
*dev
;
2256 struct in_device
*in_dev
;
2259 #define igmp_mc_seq_private(seq) ((struct igmp_mc_iter_state *)(seq)->private)
2261 static inline struct ip_mc_list
*igmp_mc_get_first(struct seq_file
*seq
)
2263 struct ip_mc_list
*im
= NULL
;
2264 struct igmp_mc_iter_state
*state
= igmp_mc_seq_private(seq
);
2266 for (state
->dev
= dev_base
, state
->in_dev
= NULL
;
2268 state
->dev
= state
->dev
->next
) {
2269 struct in_device
*in_dev
;
2270 in_dev
= in_dev_get(state
->dev
);
2273 read_lock(&in_dev
->mc_list_lock
);
2274 im
= in_dev
->mc_list
;
2276 state
->in_dev
= in_dev
;
2279 read_unlock(&in_dev
->mc_list_lock
);
2285 static struct ip_mc_list
*igmp_mc_get_next(struct seq_file
*seq
, struct ip_mc_list
*im
)
2287 struct igmp_mc_iter_state
*state
= igmp_mc_seq_private(seq
);
2290 if (likely(state
->in_dev
!= NULL
)) {
2291 read_unlock(&state
->in_dev
->mc_list_lock
);
2292 in_dev_put(state
->in_dev
);
2294 state
->dev
= state
->dev
->next
;
2296 state
->in_dev
= NULL
;
2299 state
->in_dev
= in_dev_get(state
->dev
);
2302 read_lock(&state
->in_dev
->mc_list_lock
);
2303 im
= state
->in_dev
->mc_list
;
2308 static struct ip_mc_list
*igmp_mc_get_idx(struct seq_file
*seq
, loff_t pos
)
2310 struct ip_mc_list
*im
= igmp_mc_get_first(seq
);
2312 while (pos
&& (im
= igmp_mc_get_next(seq
, im
)) != NULL
)
2314 return pos
? NULL
: im
;
2317 static void *igmp_mc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2319 read_lock(&dev_base_lock
);
2320 return *pos
? igmp_mc_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
2323 static void *igmp_mc_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2325 struct ip_mc_list
*im
;
2326 if (v
== SEQ_START_TOKEN
)
2327 im
= igmp_mc_get_first(seq
);
2329 im
= igmp_mc_get_next(seq
, v
);
2334 static void igmp_mc_seq_stop(struct seq_file
*seq
, void *v
)
2336 struct igmp_mc_iter_state
*state
= igmp_mc_seq_private(seq
);
2337 if (likely(state
->in_dev
!= NULL
)) {
2338 read_unlock(&state
->in_dev
->mc_list_lock
);
2339 in_dev_put(state
->in_dev
);
2340 state
->in_dev
= NULL
;
2343 read_unlock(&dev_base_lock
);
2346 static int igmp_mc_seq_show(struct seq_file
*seq
, void *v
)
2348 if (v
== SEQ_START_TOKEN
)
2350 "Idx\tDevice : Count Querier\tGroup Users Timer\tReporter\n");
2352 struct ip_mc_list
*im
= (struct ip_mc_list
*)v
;
2353 struct igmp_mc_iter_state
*state
= igmp_mc_seq_private(seq
);
2355 #ifdef CONFIG_IP_MULTICAST
2356 querier
= IGMP_V1_SEEN(state
->in_dev
) ? "V1" :
2357 IGMP_V2_SEEN(state
->in_dev
) ? "V2" :
2363 if (state
->in_dev
->mc_list
== im
) {
2364 seq_printf(seq
, "%d\t%-10s: %5d %7s\n",
2365 state
->dev
->ifindex
, state
->dev
->name
, state
->dev
->mc_count
, querier
);
2369 "\t\t\t\t%08X %5d %d:%08lX\t\t%d\n",
2370 im
->multiaddr
, im
->users
,
2371 im
->tm_running
, im
->tm_running
?
2372 jiffies_to_clock_t(im
->timer
.expires
-jiffies
) : 0,
2378 static struct seq_operations igmp_mc_seq_ops
= {
2379 .start
= igmp_mc_seq_start
,
2380 .next
= igmp_mc_seq_next
,
2381 .stop
= igmp_mc_seq_stop
,
2382 .show
= igmp_mc_seq_show
,
2385 static int igmp_mc_seq_open(struct inode
*inode
, struct file
*file
)
2387 struct seq_file
*seq
;
2389 struct igmp_mc_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2393 rc
= seq_open(file
, &igmp_mc_seq_ops
);
2397 seq
= file
->private_data
;
2406 static struct file_operations igmp_mc_seq_fops
= {
2407 .owner
= THIS_MODULE
,
2408 .open
= igmp_mc_seq_open
,
2410 .llseek
= seq_lseek
,
2411 .release
= seq_release_private
,
2414 struct igmp_mcf_iter_state
{
2415 struct net_device
*dev
;
2416 struct in_device
*idev
;
2417 struct ip_mc_list
*im
;
2420 #define igmp_mcf_seq_private(seq) ((struct igmp_mcf_iter_state *)(seq)->private)
2422 static inline struct ip_sf_list
*igmp_mcf_get_first(struct seq_file
*seq
)
2424 struct ip_sf_list
*psf
= NULL
;
2425 struct ip_mc_list
*im
= NULL
;
2426 struct igmp_mcf_iter_state
*state
= igmp_mcf_seq_private(seq
);
2428 for (state
->dev
= dev_base
, state
->idev
= NULL
, state
->im
= NULL
;
2430 state
->dev
= state
->dev
->next
) {
2431 struct in_device
*idev
;
2432 idev
= in_dev_get(state
->dev
);
2433 if (unlikely(idev
== NULL
))
2435 read_lock(&idev
->mc_list_lock
);
2437 if (likely(im
!= NULL
)) {
2438 spin_lock_bh(&im
->lock
);
2440 if (likely(psf
!= NULL
)) {
2445 spin_unlock_bh(&im
->lock
);
2447 read_unlock(&idev
->mc_list_lock
);
2453 static struct ip_sf_list
*igmp_mcf_get_next(struct seq_file
*seq
, struct ip_sf_list
*psf
)
2455 struct igmp_mcf_iter_state
*state
= igmp_mcf_seq_private(seq
);
2459 spin_unlock_bh(&state
->im
->lock
);
2460 state
->im
= state
->im
->next
;
2461 while (!state
->im
) {
2462 if (likely(state
->idev
!= NULL
)) {
2463 read_unlock(&state
->idev
->mc_list_lock
);
2464 in_dev_put(state
->idev
);
2466 state
->dev
= state
->dev
->next
;
2471 state
->idev
= in_dev_get(state
->dev
);
2474 read_lock(&state
->idev
->mc_list_lock
);
2475 state
->im
= state
->idev
->mc_list
;
2479 spin_lock_bh(&state
->im
->lock
);
2480 psf
= state
->im
->sources
;
2486 static struct ip_sf_list
*igmp_mcf_get_idx(struct seq_file
*seq
, loff_t pos
)
2488 struct ip_sf_list
*psf
= igmp_mcf_get_first(seq
);
2490 while (pos
&& (psf
= igmp_mcf_get_next(seq
, psf
)) != NULL
)
2492 return pos
? NULL
: psf
;
2495 static void *igmp_mcf_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2497 read_lock(&dev_base_lock
);
2498 return *pos
? igmp_mcf_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
2501 static void *igmp_mcf_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2503 struct ip_sf_list
*psf
;
2504 if (v
== SEQ_START_TOKEN
)
2505 psf
= igmp_mcf_get_first(seq
);
2507 psf
= igmp_mcf_get_next(seq
, v
);
2512 static void igmp_mcf_seq_stop(struct seq_file
*seq
, void *v
)
2514 struct igmp_mcf_iter_state
*state
= igmp_mcf_seq_private(seq
);
2515 if (likely(state
->im
!= NULL
)) {
2516 spin_unlock_bh(&state
->im
->lock
);
2519 if (likely(state
->idev
!= NULL
)) {
2520 read_unlock(&state
->idev
->mc_list_lock
);
2521 in_dev_put(state
->idev
);
2525 read_unlock(&dev_base_lock
);
2528 static int igmp_mcf_seq_show(struct seq_file
*seq
, void *v
)
2530 struct ip_sf_list
*psf
= (struct ip_sf_list
*)v
;
2531 struct igmp_mcf_iter_state
*state
= igmp_mcf_seq_private(seq
);
2533 if (v
== SEQ_START_TOKEN
) {
2536 "%10s %10s %6s %6s\n", "Idx",
2538 "SRC", "INC", "EXC");
2542 "0x%08x %6lu %6lu\n",
2543 state
->dev
->ifindex
, state
->dev
->name
,
2544 ntohl(state
->im
->multiaddr
),
2545 ntohl(psf
->sf_inaddr
),
2546 psf
->sf_count
[MCAST_INCLUDE
],
2547 psf
->sf_count
[MCAST_EXCLUDE
]);
2552 static struct seq_operations igmp_mcf_seq_ops
= {
2553 .start
= igmp_mcf_seq_start
,
2554 .next
= igmp_mcf_seq_next
,
2555 .stop
= igmp_mcf_seq_stop
,
2556 .show
= igmp_mcf_seq_show
,
2559 static int igmp_mcf_seq_open(struct inode
*inode
, struct file
*file
)
2561 struct seq_file
*seq
;
2563 struct igmp_mcf_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2567 rc
= seq_open(file
, &igmp_mcf_seq_ops
);
2571 seq
= file
->private_data
;
2580 static struct file_operations igmp_mcf_seq_fops
= {
2581 .owner
= THIS_MODULE
,
2582 .open
= igmp_mcf_seq_open
,
2584 .llseek
= seq_lseek
,
2585 .release
= seq_release_private
,
2588 int __init
igmp_mc_proc_init(void)
2590 proc_net_fops_create("igmp", S_IRUGO
, &igmp_mc_seq_fops
);
2591 proc_net_fops_create("mcfilter", S_IRUGO
, &igmp_mcf_seq_fops
);
2596 EXPORT_SYMBOL(ip_mc_dec_group
);
2597 EXPORT_SYMBOL(ip_mc_inc_group
);
2598 EXPORT_SYMBOL(ip_mc_join_group
);