* Alan Cox: Forget to enable FDDI support earlier.
* Alexey Kuznetsov: Fixed leaving groups on device down.
* Alexey Kuznetsov: Accordance to igmp-v2-06 draft.
+ * David L Stevens: IGMPv3 support, with help from
+ * Vinay Kulkarni
*/
/* Parameter names and values are taken from igmp-v2-06 draft */
#define IGMP_V1_Router_Present_Timeout (400*HZ)
+#define IGMP_V2_Router_Present_Timeout (400*HZ)
#define IGMP_Unsolicited_Report_Interval (10*HZ)
#define IGMP_Query_Response_Interval (10*HZ)
#define IGMP_Unsolicited_Report_Count 2
* contradict to specs provided this delay is small enough.
*/
-#define IGMP_V1_SEEN(in_dev) ((in_dev)->mr_v1_seen && (long)(jiffies - (in_dev)->mr_v1_seen) < 0)
+#define IGMP_V1_SEEN(in_dev) ((in_dev)->mr_v1_seen && \
+ time_before(jiffies, (in_dev)->mr_v1_seen))
+#define IGMP_V2_SEEN(in_dev) ((in_dev)->mr_v2_seen && \
+ time_before(jiffies, (in_dev)->mr_v2_seen))
#endif
+static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im);
+static void igmpv3_del_delrec(struct in_device *in_dev, __u32 multiaddr);
+static void igmpv3_clear_delrec(struct in_device *in_dev);
+static int sf_setstate(struct ip_mc_list *pmc);
+static void sf_markstate(struct ip_mc_list *pmc);
+static void ip_mc_clear_src(struct ip_mc_list *pmc);
+int ip_mc_add_src(struct in_device *in_dev, __u32 *pmca, int sfmode,
+ int sfcount, __u32 *psfsrc, int delta);
+
static void ip_ma_put(struct ip_mc_list *im)
{
if (atomic_dec_and_test(&im->refcnt)) {
atomic_inc(&im->refcnt);
}
+static void igmp_gq_start_timer(struct in_device *in_dev)
+{
+ int tv = net_random() % in_dev->mr_maxdelay;
+
+ in_dev->mr_gq_running = 1;
+ if (!mod_timer(&in_dev->mr_gq_timer, jiffies+tv+2))
+ atomic_inc(&in_dev->refcnt);
+}
+
+static void igmp_ifc_start_timer(struct in_device *in_dev, int delay)
+{
+ int tv = net_random() % delay;
+
+ if (!mod_timer(&in_dev->mr_ifc_timer, jiffies+tv+2))
+ atomic_inc(&in_dev->refcnt);
+}
+
static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)
{
spin_lock_bh(&im->lock);
#define IGMP_SIZE (sizeof(struct igmphdr)+sizeof(struct iphdr)+4)
-static int igmp_send_report(struct net_device *dev, u32 group, int type)
+
+static int is_in(struct ip_mc_list *pmc, struct ip_sf_list *psf, int type,
+ int gdeleted, int sdeleted)
+{
+ switch (type) {
+ case IGMPV3_MODE_IS_INCLUDE:
+ case IGMPV3_MODE_IS_EXCLUDE:
+ if (gdeleted || sdeleted)
+ return 0;
+ return !(pmc->gsquery && !psf->sf_gsresp);
+ case IGMPV3_CHANGE_TO_INCLUDE:
+ if (gdeleted || sdeleted)
+ return 0;
+ return psf->sf_count[MCAST_INCLUDE] != 0;
+ case IGMPV3_CHANGE_TO_EXCLUDE:
+ if (gdeleted || sdeleted)
+ return 0;
+ if (pmc->sfcount[MCAST_EXCLUDE] == 0 ||
+ psf->sf_count[MCAST_INCLUDE])
+ return 0;
+ return pmc->sfcount[MCAST_EXCLUDE] ==
+ psf->sf_count[MCAST_EXCLUDE];
+ case IGMPV3_ALLOW_NEW_SOURCES:
+ if (gdeleted || !psf->sf_crcount)
+ return 0;
+ return (pmc->sfmode == MCAST_INCLUDE) ^ sdeleted;
+ case IGMPV3_BLOCK_OLD_SOURCES:
+ if (pmc->sfmode == MCAST_INCLUDE)
+ return gdeleted || (psf->sf_crcount && sdeleted);
+ return psf->sf_crcount && !gdeleted && !sdeleted;
+ }
+ return 0;
+}
+
+static int
+igmp_scount(struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted)
+{
+ struct ip_sf_list *psf;
+ int scount = 0;
+
+ for (psf=pmc->sources; psf; psf=psf->sf_next) {
+ if (!is_in(pmc, psf, type, gdeleted, sdeleted))
+ continue;
+ scount++;
+ }
+ return scount;
+}
+
+static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
+{
+ struct sk_buff *skb;
+ struct rtable *rt;
+ struct iphdr *pip;
+ struct igmpv3_report *pig;
+
+ skb = alloc_skb(size + dev->hard_header_len + 15, GFP_ATOMIC);
+ if (skb == NULL)
+ return 0;
+
+ {
+ struct flowi fl = { .oif = dev->ifindex,
+ .nl_u = { .ip4_u = {
+ .daddr = IGMPV3_ALL_MCR } },
+ .proto = IPPROTO_IGMP };
+ if (ip_route_output_key(&rt, &fl))
+ return 0;
+ }
+ if (rt->rt_src == 0) {
+ ip_rt_put(rt);
+ return 0;
+ }
+
+ skb->dst = &rt->u.dst;
+ skb->dev = dev;
+
+ skb_reserve(skb, (dev->hard_header_len+15)&~15);
+
+ skb->nh.iph = pip =(struct iphdr *)skb_put(skb, sizeof(struct iphdr)+4);
+
+ pip->version = 4;
+ pip->ihl = (sizeof(struct iphdr)+4)>>2;
+ pip->tos = 0xc0;
+ pip->frag_off = htons(IP_DF);
+ pip->ttl = 1;
+ pip->daddr = rt->rt_dst;
+ pip->saddr = rt->rt_src;
+ pip->protocol = IPPROTO_IGMP;
+ pip->tot_len = 0; /* filled in later */
+ ip_select_ident(pip, &rt->u.dst, NULL);
+ ((u8*)&pip[1])[0] = IPOPT_RA;
+ ((u8*)&pip[1])[1] = 4;
+ ((u8*)&pip[1])[2] = 0;
+ ((u8*)&pip[1])[3] = 0;
+
+ pig =(struct igmpv3_report *)skb_put(skb, sizeof(*pig));
+ skb->h.igmph = (struct igmphdr *)pig;
+ pig->type = IGMPV3_HOST_MEMBERSHIP_REPORT;
+ pig->resv1 = 0;
+ pig->csum = 0;
+ pig->resv2 = 0;
+ pig->ngrec = 0;
+ return skb;
+}
+
+static int igmpv3_sendpack(struct sk_buff *skb)
+{
+ struct iphdr *pip = skb->nh.iph;
+ struct igmphdr *pig = skb->h.igmph;
+ int iplen, igmplen;
+
+ iplen = skb->tail - (unsigned char *)skb->nh.iph;
+ pip->tot_len = htons(iplen);
+ ip_send_check(pip);
+
+ igmplen = skb->tail - (unsigned char *)skb->h.igmph;
+ pig->csum = ip_compute_csum((void *)skb->h.igmph, igmplen);
+
+ return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, skb->dev,
+ dst_output);
+}
+
+static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel)
+{
+ return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc,type,gdel,sdel);
+}
+
+static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
+ int type, struct igmpv3_grec **ppgr)
+{
+ struct net_device *dev = pmc->interface->dev;
+ struct igmpv3_report *pih;
+ struct igmpv3_grec *pgr;
+
+ if (!skb)
+ skb = igmpv3_newpack(dev, dev->mtu);
+ if (!skb)
+ return 0;
+ pgr = (struct igmpv3_grec *)skb_put(skb, sizeof(struct igmpv3_grec));
+ pgr->grec_type = type;
+ pgr->grec_auxwords = 0;
+ pgr->grec_nsrcs = 0;
+ pgr->grec_mca = pmc->multiaddr;
+ pih = (struct igmpv3_report *)skb->h.igmph;
+ pih->ngrec = htons(ntohs(pih->ngrec)+1);
+ *ppgr = pgr;
+ return skb;
+}
+
+#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
+ skb_tailroom(skb)) : 0)
+
+static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
+ int type, int gdeleted, int sdeleted)
+{
+ struct net_device *dev = pmc->interface->dev;
+ struct igmpv3_report *pih;
+ struct igmpv3_grec *pgr = 0;
+ struct ip_sf_list *psf, *psf_next, *psf_prev, *psf_list;
+ int scount, first, isquery, truncate;
+
+ if (pmc->multiaddr == IGMP_ALL_HOSTS)
+ return skb;
+
+ isquery = type == IGMPV3_MODE_IS_INCLUDE ||
+ type == IGMPV3_MODE_IS_EXCLUDE;
+ truncate = type == IGMPV3_MODE_IS_EXCLUDE ||
+ type == IGMPV3_CHANGE_TO_EXCLUDE;
+
+ psf_list = sdeleted ? pmc->tomb : pmc->sources;
+
+ if (!psf_list) {
+ if (type == IGMPV3_ALLOW_NEW_SOURCES ||
+ type == IGMPV3_BLOCK_OLD_SOURCES)
+ return skb;
+ if (pmc->crcount || isquery)
+ skb = add_grhead(skb, pmc, type, &pgr);
+ return skb;
+ }
+ pih = skb ? (struct igmpv3_report *)skb->h.igmph : 0;
+
+ /* EX and TO_EX get a fresh packet, if needed */
+ if (truncate) {
+ if (pih && pih->ngrec &&
+ AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
+ if (skb)
+ igmpv3_sendpack(skb);
+ skb = igmpv3_newpack(dev, dev->mtu);
+ }
+ }
+ first = 1;
+ scount = 0;
+ psf_prev = 0;
+ for (psf=psf_list; psf; psf=psf_next) {
+ u32 *psrc;
+
+ psf_next = psf->sf_next;
+
+ if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
+ psf_prev = psf;
+ continue;
+ }
+
+ /* clear marks on query responses */
+ if (isquery)
+ psf->sf_gsresp = 0;
+
+ if (AVAILABLE(skb) < sizeof(u32) +
+ first*sizeof(struct igmpv3_grec)) {
+ if (truncate && !first)
+ break; /* truncate these */
+ if (pgr)
+ pgr->grec_nsrcs = htons(scount);
+ if (skb)
+ igmpv3_sendpack(skb);
+ skb = igmpv3_newpack(dev, dev->mtu);
+ first = 1;
+ scount = 0;
+ }
+ if (first) {
+ skb = add_grhead(skb, pmc, type, &pgr);
+ first = 0;
+ }
+ psrc = (u32 *)skb_put(skb, sizeof(u32));
+ *psrc = psf->sf_inaddr;
+ scount++;
+ if ((type == IGMPV3_ALLOW_NEW_SOURCES ||
+ type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
+ psf->sf_crcount--;
+ if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
+ if (psf_prev)
+ psf_prev->sf_next = psf->sf_next;
+ else
+ pmc->tomb = psf->sf_next;
+ kfree(psf);
+ continue;
+ }
+ }
+ psf_prev = psf;
+ }
+ if (pgr)
+ pgr->grec_nsrcs = htons(scount);
+
+ if (isquery)
+ pmc->gsquery = 0; /* clear query state on report */
+ return skb;
+}
+
+static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
+{
+ struct sk_buff *skb = 0;
+ int type;
+
+ if (!pmc) {
+ read_lock(&in_dev->lock);
+ for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) {
+ if (pmc->multiaddr == IGMP_ALL_HOSTS)
+ continue;
+ spin_lock_bh(&pmc->lock);
+ if (pmc->sfcount[MCAST_EXCLUDE])
+ type = IGMPV3_MODE_IS_EXCLUDE;
+ else
+ type = IGMPV3_MODE_IS_INCLUDE;
+ skb = add_grec(skb, pmc, type, 0, 0);
+ spin_unlock_bh(&pmc->lock);
+ }
+ read_unlock(&in_dev->lock);
+ } else {
+ spin_lock_bh(&pmc->lock);
+ if (pmc->sfcount[MCAST_EXCLUDE])
+ type = IGMPV3_MODE_IS_EXCLUDE;
+ else
+ type = IGMPV3_MODE_IS_INCLUDE;
+ skb = add_grec(skb, pmc, type, 0, 0);
+ spin_unlock_bh(&pmc->lock);
+ }
+ if (!skb)
+ return 0;
+ return igmpv3_sendpack(skb);
+}
+
+/*
+ * remove zero-count source records from a source filter list
+ */
+static void igmpv3_clear_zeros(struct ip_sf_list **ppsf)
+{
+ struct ip_sf_list *psf_prev, *psf_next, *psf;
+
+ psf_prev = 0;
+ for (psf=*ppsf; psf; psf = psf_next) {
+ psf_next = psf->sf_next;
+ if (psf->sf_crcount == 0) {
+ if (psf_prev)
+ psf_prev->sf_next = psf->sf_next;
+ else
+ *ppsf = psf->sf_next;
+ kfree(psf);
+ } else
+ psf_prev = psf;
+ }
+}
+
+static void igmpv3_send_cr(struct in_device *in_dev)
+{
+ struct ip_mc_list *pmc, *pmc_prev, *pmc_next;
+ struct sk_buff *skb = 0;
+ int type, dtype;
+
+ read_lock(&in_dev->lock);
+ write_lock_bh(&in_dev->mc_lock);
+
+ /* deleted MCA's */
+ pmc_prev = 0;
+ for (pmc=in_dev->mc_tomb; pmc; pmc=pmc_next) {
+ pmc_next = pmc->next;
+ if (pmc->sfmode == MCAST_INCLUDE) {
+ type = IGMPV3_BLOCK_OLD_SOURCES;
+ dtype = IGMPV3_BLOCK_OLD_SOURCES;
+ skb = add_grec(skb, pmc, type, 1, 0);
+ skb = add_grec(skb, pmc, dtype, 1, 1);
+ }
+ if (pmc->crcount) {
+ pmc->crcount--;
+ if (pmc->sfmode == MCAST_EXCLUDE) {
+ type = IGMPV3_CHANGE_TO_INCLUDE;
+ skb = add_grec(skb, pmc, type, 1, 0);
+ }
+ if (pmc->crcount == 0) {
+ igmpv3_clear_zeros(&pmc->tomb);
+ igmpv3_clear_zeros(&pmc->sources);
+ }
+ }
+ if (pmc->crcount == 0 && !pmc->tomb && !pmc->sources) {
+ if (pmc_prev)
+ pmc_prev->next = pmc_next;
+ else
+ in_dev->mc_tomb = pmc_next;
+ in_dev_put(pmc->interface);
+ kfree(pmc);
+ } else
+ pmc_prev = pmc;
+ }
+ write_unlock_bh(&in_dev->mc_lock);
+
+ /* change recs */
+ for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) {
+ spin_lock_bh(&pmc->lock);
+ if (pmc->sfcount[MCAST_EXCLUDE]) {
+ type = IGMPV3_BLOCK_OLD_SOURCES;
+ dtype = IGMPV3_ALLOW_NEW_SOURCES;
+ } else {
+ type = IGMPV3_ALLOW_NEW_SOURCES;
+ dtype = IGMPV3_BLOCK_OLD_SOURCES;
+ }
+ skb = add_grec(skb, pmc, type, 0, 0);
+ skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
+
+ /* filter mode changes */
+ if (pmc->crcount) {
+ pmc->crcount--;
+ if (pmc->sfmode == MCAST_EXCLUDE)
+ type = IGMPV3_CHANGE_TO_EXCLUDE;
+ else
+ type = IGMPV3_CHANGE_TO_INCLUDE;
+ skb = add_grec(skb, pmc, type, 0, 0);
+ }
+ spin_unlock_bh(&pmc->lock);
+ }
+ read_unlock(&in_dev->lock);
+ if (!skb)
+ return;
+ (void) igmpv3_sendpack(skb);
+}
+
+static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
+ int type)
{
struct sk_buff *skb;
struct iphdr *iph;
struct igmphdr *ih;
struct rtable *rt;
+ struct net_device *dev = in_dev->dev;
+ u32 group = pmc ? pmc->multiaddr : 0;
u32 dst;
- /* According to IGMPv2 specs, LEAVE messages are
- * sent to all-routers group.
- */
- dst = group;
- if (type == IGMP_HOST_LEAVE_MESSAGE)
+ if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
+ return igmpv3_send_report(in_dev, pmc);
+ else if (type == IGMP_HOST_LEAVE_MESSAGE)
dst = IGMP_ALL_ROUTER;
+ else
+ dst = group;
{
struct flowi fl = { .oif = dev->ifindex,
iph->version = 4;
iph->ihl = (sizeof(struct iphdr)+4)>>2;
- iph->tos = 0;
+ iph->tos = 0xc0;
iph->frag_off = htons(IP_DF);
iph->ttl = 1;
iph->daddr = dst;
dst_output);
}
+static void igmp_gq_timer_expire(unsigned long data)
+{
+ struct in_device *in_dev = (struct in_device *)data;
+
+ in_dev->mr_gq_running = 0;
+ igmpv3_send_report(in_dev, 0);
+}
+
+static void igmp_ifc_timer_expire(unsigned long data)
+{
+ struct in_device *in_dev = (struct in_device *)data;
+
+ igmpv3_send_cr(in_dev);
+ if (in_dev->mr_ifc_count) {
+ in_dev->mr_ifc_count--;
+ igmp_ifc_start_timer(in_dev, IGMP_Unsolicited_Report_Interval);
+ }
+}
+
+static void igmp_ifc_event(struct in_device *in_dev)
+{
+ if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev))
+ return;
+ in_dev->mr_ifc_count = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ igmp_ifc_start_timer(in_dev, 1);
+}
+
static void igmp_timer_expire(unsigned long data)
{
spin_unlock(&im->lock);
if (IGMP_V1_SEEN(in_dev))
- igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_MEMBERSHIP_REPORT);
+ igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);
+ else if (IGMP_V2_SEEN(in_dev))
+ igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);
else
- igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_NEW_MEMBERSHIP_REPORT);
+ igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);
ip_ma_put(im);
}
+static void igmp_marksources(struct ip_mc_list *pmc, int nsrcs, __u32 *srcs)
+{
+ struct ip_sf_list *psf;
+ int i, scount;
+
+ scount = 0;
+ for (psf=pmc->sources; psf; psf=psf->sf_next) {
+ if (scount == nsrcs)
+ break;
+ for (i=0; i<nsrcs; i++)
+ if (srcs[i] == psf->sf_inaddr) {
+ psf->sf_gsresp = 1;
+ scount++;
+ break;
+ }
+ }
+}
+
static void igmp_heard_report(struct in_device *in_dev, u32 group)
{
struct ip_mc_list *im;
read_unlock(&in_dev->lock);
}
-static void igmp_heard_query(struct in_device *in_dev, unsigned char max_resp_time,
- u32 group)
+static void igmp_heard_query(struct in_device *in_dev, struct igmphdr *ih,
+ int len)
{
+ struct igmpv3_query *ih3 = (struct igmpv3_query *)ih;
struct ip_mc_list *im;
+ u32 group = ih->group;
int max_delay;
+ int mark = 0;
- max_delay = max_resp_time*(HZ/IGMP_TIMER_SCALE);
- if (max_resp_time == 0) {
- /* Alas, old v1 router presents here. */
-
- max_delay = IGMP_Query_Response_Interval;
- in_dev->mr_v1_seen = jiffies + IGMP_V1_Router_Present_Timeout;
- group = 0;
+ if (len == 8) {
+ if (ih->code == 0) {
+ /* Alas, old v1 router presents here. */
+
+ max_delay = IGMP_Query_Response_Interval;
+ in_dev->mr_v1_seen = jiffies +
+ IGMP_V1_Router_Present_Timeout;
+ group = 0;
+ } else {
+ /* v2 router present */
+ max_delay = ih->code*(HZ/IGMP_TIMER_SCALE);
+ in_dev->mr_v2_seen = jiffies +
+ IGMP_V2_Router_Present_Timeout;
+ }
+ igmpv3_clear_delrec(in_dev);
+ } else if (len < 12) {
+ return; /* ignore bogus packet; freed by caller */
+ } else { /* v3 */
+ max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE);
+ in_dev->mr_maxdelay = max_delay;
+ if (ih3->qrv)
+ in_dev->mr_qrv = ih3->qrv;
+ if (!group) { /* general query */
+ if (ih3->nsrcs)
+ return; /* no sources allowed */
+ igmp_gq_start_timer(in_dev);
+ return;
+ }
+ /* mark sources to include, if group & source-specific */
+ mark = ih3->nsrcs != 0;
}
/*
continue;
if (im->multiaddr == IGMP_ALL_HOSTS)
continue;
+ spin_lock_bh(&im->lock);
+ if (im->tm_running)
+ im->gsquery = im->gsquery && mark;
+ else
+ im->gsquery = mark;
+ if (im->gsquery)
+ igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);
+ spin_unlock_bh(&im->lock);
igmp_mod_timer(im, max_delay);
}
read_unlock(&in_dev->lock);
switch (ih->type) {
case IGMP_HOST_MEMBERSHIP_QUERY:
- igmp_heard_query(in_dev, ih->code, ih->group);
+ igmp_heard_query(in_dev, ih, len);
break;
case IGMP_HOST_MEMBERSHIP_REPORT:
- case IGMP_HOST_NEW_MEMBERSHIP_REPORT:
+ case IGMPV2_HOST_MEMBERSHIP_REPORT:
+ case IGMPV3_HOST_MEMBERSHIP_REPORT:
/* Is it our report looped back? */
if (((struct rtable*)skb->dst)->fl.iif == 0)
break;
dev_mc_delete(dev,buf,dev->addr_len,0);
}
+/*
+ * deleted ip_mc_list manipulation
+ */
+static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)
+{
+ struct ip_mc_list *pmc;
+
+ /* this is an "ip_mc_list" for convenience; only the fields below
+ * are actually used. In particular, the refcnt and users are not
+ * used for management of the delete list. Using the same structure
+ * for deleted items allows change reports to use common code with
+ * non-deleted or query-response MCA's.
+ */
+ pmc = (struct ip_mc_list *)kmalloc(sizeof(*pmc), GFP_KERNEL);
+ if (!pmc)
+ return;
+ memset(pmc, 0, sizeof(*pmc));
+ spin_lock_bh(&im->lock);
+ pmc->interface = im->interface;
+ in_dev_hold(in_dev);
+ pmc->multiaddr = im->multiaddr;
+ pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ pmc->sfmode = im->sfmode;
+ if (pmc->sfmode == MCAST_INCLUDE) {
+ struct ip_sf_list *psf;
+
+ pmc->tomb = im->tomb;
+ pmc->sources = im->sources;
+ im->tomb = im->sources = 0;
+ for (psf=pmc->sources; psf; psf=psf->sf_next)
+ psf->sf_crcount = pmc->crcount;
+ }
+ spin_unlock_bh(&im->lock);
+
+ write_lock_bh(&in_dev->mc_lock);
+ pmc->next = in_dev->mc_tomb;
+ in_dev->mc_tomb = pmc;
+ write_unlock_bh(&in_dev->mc_lock);
+}
+
+static void igmpv3_del_delrec(struct in_device *in_dev, __u32 multiaddr)
+{
+ struct ip_mc_list *pmc, *pmc_prev;
+ struct ip_sf_list *psf, *psf_next;
+
+ write_lock_bh(&in_dev->mc_lock);
+ pmc_prev = 0;
+ for (pmc=in_dev->mc_tomb; pmc; pmc=pmc->next) {
+ if (pmc->multiaddr == multiaddr)
+ break;
+ pmc_prev = pmc;
+ }
+ if (pmc) {
+ if (pmc_prev)
+ pmc_prev->next = pmc->next;
+ else
+ in_dev->mc_tomb = pmc->next;
+ }
+ write_unlock_bh(&in_dev->mc_lock);
+ if (pmc) {
+ for (psf=pmc->tomb; psf; psf=psf_next) {
+ psf_next = psf->sf_next;
+ kfree(psf);
+ }
+ in_dev_put(pmc->interface);
+ kfree(pmc);
+ }
+}
+
+static void igmpv3_clear_delrec(struct in_device *in_dev)
+{
+ struct ip_mc_list *pmc, *nextpmc;
+
+ write_lock_bh(&in_dev->mc_lock);
+ pmc = in_dev->mc_tomb;
+ in_dev->mc_tomb = 0;
+ write_unlock_bh(&in_dev->mc_lock);
+
+ for (; pmc; pmc = nextpmc) {
+ nextpmc = pmc->next;
+ ip_mc_clear_src(pmc);
+ in_dev_put(pmc->interface);
+ kfree(pmc);
+ }
+}
+
static void igmp_group_dropped(struct ip_mc_list *im)
{
#ifdef CONFIG_IP_MULTICAST
int reporter;
+ struct in_device *in_dev = im->interface;
#endif
if (im->loaded) {
im->loaded = 0;
- ip_mc_filter_del(im->interface, im->multiaddr);
+ ip_mc_filter_del(in_dev, im->multiaddr);
}
#ifdef CONFIG_IP_MULTICAST
reporter = im->reporter;
igmp_stop_timer(im);
- if (reporter && !IGMP_V1_SEEN(im->interface))
- igmp_send_report(im->interface->dev, im->multiaddr, IGMP_HOST_LEAVE_MESSAGE);
+ if (IGMP_V1_SEEN(in_dev))
+ goto done;
+ if (IGMP_V2_SEEN(in_dev)) {
+ if (reporter)
+ igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);
+ goto done;
+ }
+ /* IGMPv3 */
+ igmpv3_add_delrec(in_dev, im);
+
+ igmp_ifc_event(in_dev);
+done:
+ ip_mc_clear_src(im);
#endif
}
static void igmp_group_added(struct ip_mc_list *im)
{
+ struct in_device *in_dev = im->interface;
+
if (im->loaded == 0) {
im->loaded = 1;
- ip_mc_filter_add(im->interface, im->multiaddr);
+ ip_mc_filter_add(in_dev, im->multiaddr);
}
#ifdef CONFIG_IP_MULTICAST
if (im->multiaddr == IGMP_ALL_HOSTS)
return;
- spin_lock_bh(&im->lock);
- igmp_start_timer(im, IGMP_Initial_Report_Delay);
- spin_unlock_bh(&im->lock);
+ if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) {
+ spin_lock_bh(&im->lock);
+ igmp_start_timer(im, IGMP_Initial_Report_Delay);
+ spin_unlock_bh(&im->lock);
+ return;
+ }
+ /* else, v3 */
+
+ im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ igmp_ifc_event(in_dev);
#endif
}
for (im=in_dev->mc_list; im; im=im->next) {
if (im->multiaddr == addr) {
im->users++;
+ ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, 0, 0);
goto out;
}
}
im->interface=in_dev;
in_dev_hold(in_dev);
im->multiaddr=addr;
+ /* initial mode is (EX, empty) */
+ im->sfmode = MCAST_EXCLUDE;
+ im->sfcount[MCAST_INCLUDE] = 0;
+ im->sfcount[MCAST_EXCLUDE] = 1;
+ im->sources = 0;
+ im->tomb = 0;
+ im->crcount = 0;
atomic_set(&im->refcnt, 1);
spin_lock_init(&im->lock);
#ifdef CONFIG_IP_MULTICAST
im->timer.function=&igmp_timer_expire;
im->unsolicit_count = IGMP_Unsolicited_Report_Count;
im->reporter = 0;
+ im->gsquery = 0;
#endif
im->loaded = 0;
write_lock_bh(&in_dev->lock);
im->next=in_dev->mc_list;
in_dev->mc_list=im;
write_unlock_bh(&in_dev->lock);
+ igmpv3_del_delrec(in_dev, im->multiaddr);
igmp_group_added(im);
if (in_dev->dev->flags & IFF_UP)
ip_rt_multicast_event(in_dev);
ASSERT_RTNL();
+ in_dev->mr_ifc_count = 0;
+ if (del_timer(&in_dev->mr_ifc_timer))
+ atomic_dec(&in_dev->refcnt);
+ in_dev->mr_gq_running = 0;
+ if (del_timer(&in_dev->mr_gq_timer))
+ atomic_dec(&in_dev->refcnt);
+
for (i=in_dev->mc_list; i; i=i->next)
igmp_group_dropped(i);
+ igmpv3_clear_delrec(in_dev);
+
ip_mc_dec_group(in_dev, IGMP_ALL_HOSTS);
}
ASSERT_RTNL();
+ in_dev->mc_lock = RW_LOCK_UNLOCKED;
+ in_dev->mr_gq_running = 0;
+ init_timer(&in_dev->mr_gq_timer);
+ in_dev->mr_gq_timer.data=(unsigned long) in_dev;
+ in_dev->mr_gq_timer.function=&igmp_gq_timer_expire;
+ in_dev->mc_tomb = 0;
+ in_dev->mr_ifc_count = 0;
+ init_timer(&in_dev->mr_ifc_timer);
+ in_dev->mr_ifc_timer.data=(unsigned long) in_dev;
+ in_dev->mr_ifc_timer.function=&igmp_ifc_timer_expire;
+ in_dev->mr_qrv = IGMP_Unsolicited_Report_Count;
+
ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS);
for (i=in_dev->mc_list; i; i=i->next)
*/
int sysctl_igmp_max_memberships = IP_MAX_MEMBERSHIPS;
+
+static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
+ __u32 *psfsrc)
+{
+ struct ip_sf_list *psf, *psf_prev;
+ int rv = 0;
+
+ psf_prev = 0;
+ for (psf=pmc->sources; psf; psf=psf->sf_next) {
+ if (psf->sf_inaddr == *psfsrc)
+ break;
+ psf_prev = psf;
+ }
+ if (!psf || psf->sf_count[sfmode] == 0) {
+ /* source filter not found, or count wrong => bug */
+ return -ESRCH;
+ }
+ psf->sf_count[sfmode]--;
+ if (psf->sf_count[sfmode] == 0) {
+ ip_rt_multicast_event(pmc->interface);
+ }
+ if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
+ struct in_device *in_dev = pmc->interface;
+
+ /* no more filters for this source */
+ if (psf_prev)
+ psf_prev->sf_next = psf->sf_next;
+ else
+ pmc->sources = psf->sf_next;
+ if (psf->sf_oldin &&
+ !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) {
+ psf->sf_crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ psf->sf_next = pmc->tomb;
+ pmc->tomb = psf;
+ rv = 1;
+ } else
+ kfree(psf);
+ }
+ return rv;
+}
+
+int ip_mc_del_src(struct in_device *in_dev, __u32 *pmca, int sfmode,
+ int sfcount, __u32 *psfsrc, int delta)
+{
+ struct ip_mc_list *pmc;
+ int changerec = 0;
+ int i, err;
+
+ if (!in_dev)
+ return -ENODEV;
+ read_lock(&in_dev->lock);
+ for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) {
+ if (*pmca == pmc->multiaddr)
+ break;
+ }
+ if (!pmc) {
+ /* MCA not found?? bug */
+ read_unlock(&in_dev->lock);
+ return -ESRCH;
+ }
+ spin_lock_bh(&pmc->lock);
+ read_unlock(&in_dev->lock);
+ sf_markstate(pmc);
+ if (!delta) {
+ if (!pmc->sfcount[sfmode])
+ return -EINVAL;
+ pmc->sfcount[sfmode]--;
+ }
+ err = 0;
+ for (i=0; i<sfcount; i++) {
+ int rv = ip_mc_del1_src(pmc, sfmode, &psfsrc[i]);
+
+ changerec |= rv > 0;
+ if (!err && rv < 0)
+ err = rv;
+ }
+ if (pmc->sfmode == MCAST_EXCLUDE &&
+ pmc->sfcount[MCAST_EXCLUDE] == 0 &&
+ pmc->sfcount[MCAST_INCLUDE]) {
+ struct ip_sf_list *psf;
+
+ /* filter mode change */
+ pmc->sfmode = MCAST_INCLUDE;
+ pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ in_dev->mr_ifc_count = pmc->crcount;
+ for (psf=pmc->sources; psf; psf = psf->sf_next)
+ psf->sf_crcount = 0;
+ igmp_ifc_event(pmc->interface);
+ } else if (sf_setstate(pmc) || changerec)
+ igmp_ifc_event(pmc->interface);
+ spin_unlock_bh(&pmc->lock);
+ return err;
+}
+
+/*
+ * Add multicast single-source filter to the interface list
+ */
+static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode,
+ __u32 *psfsrc, int delta)
+{
+ struct ip_sf_list *psf, *psf_prev;
+
+ psf_prev = 0;
+ for (psf=pmc->sources; psf; psf=psf->sf_next) {
+ if (psf->sf_inaddr == *psfsrc)
+ break;
+ psf_prev = psf;
+ }
+ if (!psf) {
+ psf = (struct ip_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
+ if (!psf)
+ return -ENOBUFS;
+ memset(psf, 0, sizeof(*psf));
+ psf->sf_inaddr = *psfsrc;
+ if (psf_prev) {
+ psf_prev->sf_next = psf;
+ } else
+ pmc->sources = psf;
+ }
+ psf->sf_count[sfmode]++;
+ if (psf->sf_count[sfmode] == 1) {
+ ip_rt_multicast_event(pmc->interface);
+ }
+ return 0;
+}
+
+static void sf_markstate(struct ip_mc_list *pmc)
+{
+ struct ip_sf_list *psf;
+ int mca_xcount = pmc->sfcount[MCAST_EXCLUDE];
+
+ for (psf=pmc->sources; psf; psf=psf->sf_next)
+ if (pmc->sfcount[MCAST_EXCLUDE]) {
+ psf->sf_oldin = mca_xcount ==
+ psf->sf_count[MCAST_EXCLUDE] &&
+ !psf->sf_count[MCAST_INCLUDE];
+ } else
+ psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
+}
+
+static int sf_setstate(struct ip_mc_list *pmc)
+{
+ struct ip_sf_list *psf;
+ int mca_xcount = pmc->sfcount[MCAST_EXCLUDE];
+ int qrv = pmc->interface->mr_qrv;
+ int new_in, rv;
+
+ rv = 0;
+ for (psf=pmc->sources; psf; psf=psf->sf_next) {
+ if (pmc->sfcount[MCAST_EXCLUDE]) {
+ new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
+ !psf->sf_count[MCAST_INCLUDE];
+ } else
+ new_in = psf->sf_count[MCAST_INCLUDE] != 0;
+ if (new_in != psf->sf_oldin) {
+ psf->sf_crcount = qrv;
+ rv++;
+ }
+ }
+ return rv;
+}
+
+/*
+ * Add multicast source filter list to the interface list
+ */
+int ip_mc_add_src(struct in_device *in_dev, __u32 *pmca, int sfmode,
+ int sfcount, __u32 *psfsrc, int delta)
+{
+ struct ip_mc_list *pmc;
+ int isexclude;
+ int i, err;
+
+ if (!in_dev)
+ return -ENODEV;
+ read_lock(&in_dev->lock);
+ for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) {
+ if (*pmca == pmc->multiaddr)
+ break;
+ }
+ if (!pmc) {
+ /* MCA not found?? bug */
+ read_unlock(&in_dev->lock);
+ return -ESRCH;
+ }
+ spin_lock_bh(&pmc->lock);
+ read_unlock(&in_dev->lock);
+
+ sf_markstate(pmc);
+ isexclude = pmc->sfmode == MCAST_EXCLUDE;
+ if (!delta)
+ pmc->sfcount[sfmode]++;
+ err = 0;
+ for (i=0; i<sfcount; i++) {
+ err = ip_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
+ if (err)
+ break;
+ }
+ if (err) {
+ int j;
+
+ pmc->sfcount[sfmode]--;
+ for (j=0; j<i; j++)
+ (void) ip_mc_del1_src(pmc, sfmode, &psfsrc[i]);
+ } else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) {
+ struct in_device *in_dev = pmc->interface;
+ struct ip_sf_list *psf;
+
+ /* filter mode change */
+ if (pmc->sfcount[MCAST_EXCLUDE])
+ pmc->sfmode = MCAST_EXCLUDE;
+ else if (pmc->sfcount[MCAST_INCLUDE])
+ pmc->sfmode = MCAST_INCLUDE;
+ /* else no filters; keep old mode for reports */
+
+ pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+ IGMP_Unsolicited_Report_Count;
+ in_dev->mr_ifc_count = pmc->crcount;
+ for (psf=pmc->sources; psf; psf = psf->sf_next)
+ psf->sf_crcount = 0;
+ igmp_ifc_event(in_dev);
+ } else if (sf_setstate(pmc))
+ igmp_ifc_event(in_dev);
+ spin_unlock_bh(&pmc->lock);
+ return err;
+}
+
+static void ip_mc_clear_src(struct ip_mc_list *pmc)
+{
+ struct ip_sf_list *psf, *nextpsf;
+
+ for (psf=pmc->tomb; psf; psf=nextpsf) {
+ nextpsf = psf->sf_next;
+ kfree(psf);
+ }
+ pmc->tomb = 0;
+ for (psf=pmc->sources; psf; psf=nextpsf) {
+ nextpsf = psf->sf_next;
+ kfree(psf);
+ }
+ pmc->sources = 0;
+ pmc->sfmode = MCAST_EXCLUDE;
+ pmc->sfcount[MCAST_EXCLUDE] = 0;
+ pmc->sfcount[MCAST_EXCLUDE] = 1;
+}
+
+
+/*
+ * Join a multicast group
+ */
int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr)
{
int err;
memcpy(&iml->multi, imr, sizeof(*imr));
iml->next = inet->mc_list;
iml->count = 1;
+ iml->sflist = NULL;
+ iml->sfmode = MCAST_EXCLUDE;
inet->mc_list = iml;
ip_mc_inc_group(in_dev, addr);
iml = NULL;
return err;
}
+int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml,
+ struct in_device *in_dev)
+{
+ int err;
+
+ if (iml->sflist == 0) {
+ /* any-source empty exclude case */
+ return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
+ iml->sfmode, 0, 0, 0);
+ }
+ err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
+ iml->sfmode, iml->sflist->sl_count,
+ iml->sflist->sl_addr, 0);
+ sock_kfree_s(sk, iml->sflist, IP_SFLSIZE(iml->sflist->sl_max));
+ iml->sflist = 0;
+ return err;
+}
+
/*
* Ask a socket to leave a group.
*/
iml->multi.imr_address.s_addr==imr->imr_address.s_addr &&
(!imr->imr_ifindex || iml->multi.imr_ifindex==imr->imr_ifindex)) {
struct in_device *in_dev;
+
+ in_dev = inetdev_by_index(iml->multi.imr_ifindex);
+ if (in_dev)
+ (void) ip_mc_leave_src(sk, iml, in_dev);
if (--iml->count) {
rtnl_unlock();
+ if (in_dev)
+ in_dev_put(in_dev);
return 0;
}
*imlp = iml->next;
- in_dev = inetdev_by_index(iml->multi.imr_ifindex);
if (in_dev) {
ip_mc_dec_group(in_dev, imr->imr_multiaddr.s_addr);
in_dev_put(in_dev);
return -EADDRNOTAVAIL;
}
+int ip_mc_source(int add, int omode, struct sock *sk, struct
+ ip_mreq_source *mreqs)
+{
+ int err;
+ struct ip_mreqn imr;
+ u32 addr = mreqs->imr_multiaddr;
+ struct ip_mc_socklist *pmc;
+ struct in_device *in_dev;
+ struct inet_opt *inet = inet_sk(sk);
+ struct ip_sf_socklist *psl;
+ int i, j, rv;
+
+ if (!MULTICAST(addr))
+ return -EINVAL;
+
+ rtnl_shlock();
+
+ imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr;
+ imr.imr_address.s_addr = mreqs->imr_interface;
+ imr.imr_ifindex = 0;
+ in_dev = ip_mc_find_dev(&imr);
+
+ if (!in_dev) {
+ err = -ENODEV;
+ goto done;
+ }
+ err = -EADDRNOTAVAIL;
+
+ for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
+ if (memcmp(&pmc->multi, mreqs, 2*sizeof(__u32)) == 0)
+ break;
+ }
+ if (!pmc) /* must have a prior join */
+ goto done;
+ /* if a source filter was set, must be the same mode as before */
+ if (pmc->sflist) {
+ if (pmc->sfmode != omode)
+ goto done;
+ } else if (pmc->sfmode != omode) {
+ /* allow mode switches for empty-set filters */
+ ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0,
+ 0, 0);
+ pmc->sfmode = omode;
+ ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0,
+ 0, 0);
+ }
+
+ psl = pmc->sflist;
+ if (!add) {
+ if (!psl)
+ goto done;
+ rv = !0;
+ for (i=0; i<psl->sl_count; i++) {
+ rv = memcmp(&psl->sl_addr, &mreqs->imr_multiaddr,
+ sizeof(__u32));
+ if (rv >= 0)
+ break;
+ }
+ if (!rv) /* source not found */
+ goto done;
+
+ /* update the interface filter */
+ ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1,
+ &mreqs->imr_sourceaddr, 1);
+
+ for (j=i+1; j<psl->sl_count; j++)
+ psl->sl_addr[j-1] = psl->sl_addr[j];
+ psl->sl_count--;
+ err = 0;
+ goto done;
+ }
+ /* else, add a new source to the filter */
+
+ if (!psl || psl->sl_count == psl->sl_max) {
+ struct ip_sf_socklist *newpsl;
+ int count = IP_SFBLOCK;
+
+ if (psl)
+ count += psl->sl_max;
+ newpsl = (struct ip_sf_socklist *)sock_kmalloc(sk,
+ IP_SFLSIZE(count), GFP_KERNEL);
+ if (!newpsl) {
+ err = -ENOBUFS;
+ goto done;
+ }
+ newpsl->sl_max = count;
+ newpsl->sl_count = count - IP_SFBLOCK;
+ if (psl) {
+ for (i=0; i<psl->sl_count; i++)
+ newpsl->sl_addr[i] = psl->sl_addr[i];
+ sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max));
+ }
+ pmc->sflist = psl = newpsl;
+ }
+ rv = 1; /* > 0 for insert logic below if sl_count is 0 */
+ for (i=0; i<psl->sl_count; i++) {
+ rv = memcmp(&psl->sl_addr, &mreqs->imr_multiaddr,
+ sizeof(__u32));
+ if (rv >= 0)
+ break;
+ }
+ if (rv == 0) /* address already there is an error */
+ goto done;
+ for (j=psl->sl_count-1; j>=i; j--)
+ psl->sl_addr[j+1] = psl->sl_addr[j];
+ psl->sl_addr[i] = mreqs->imr_sourceaddr;
+ psl->sl_count++;
+ err = 0;
+ /* update the interface list */
+ ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1,
+ &mreqs->imr_sourceaddr, 1);
+done:
+ rtnl_shunlock();
+ return err;
+}
+
+int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf)
+{
+ int err;
+ struct ip_mreqn imr;
+ u32 addr = msf->imsf_multiaddr;
+ struct ip_mc_socklist *pmc;
+ struct in_device *in_dev;
+ struct inet_opt *inet = inet_sk(sk);
+ struct ip_sf_socklist *newpsl, *psl;
+
+ if (!MULTICAST(addr))
+ return -EINVAL;
+ if (msf->imsf_fmode != MCAST_INCLUDE &&
+ msf->imsf_fmode != MCAST_EXCLUDE)
+ return -EINVAL;
+
+ rtnl_shlock();
+
+ imr.imr_multiaddr.s_addr = msf->imsf_multiaddr;
+ imr.imr_address.s_addr = msf->imsf_interface;
+ imr.imr_ifindex = 0;
+ in_dev = ip_mc_find_dev(&imr);
+
+ if (!in_dev) {
+ err = -ENODEV;
+ goto done;
+ }
+ err = -EADDRNOTAVAIL;
+
+ for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
+ if (memcmp(&pmc->multi, &imr, sizeof(imr)) == 0)
+ break;
+ }
+ if (!pmc) /* must have a prior join */
+ goto done;
+ if (msf->imsf_numsrc) {
+ newpsl = (struct ip_sf_socklist *)sock_kmalloc(sk,
+ IP_SFLSIZE(msf->imsf_numsrc), GFP_KERNEL);
+ if (!newpsl) {
+ err = -ENOBUFS;
+ goto done;
+ }
+ newpsl->sl_max = newpsl->sl_count = msf->imsf_numsrc;
+ memcpy(newpsl->sl_addr, msf->imsf_slist,
+ msf->imsf_numsrc * sizeof(msf->imsf_slist[0]));
+ err = ip_mc_add_src(in_dev, &msf->imsf_multiaddr,
+ msf->imsf_fmode, newpsl->sl_count, newpsl->sl_addr, 0);
+ if (err) {
+ sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max));
+ goto done;
+ }
+ } else
+ newpsl = 0;
+ psl = pmc->sflist;
+ if (psl) {
+ (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
+ psl->sl_count, psl->sl_addr, 0);
+ sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max));
+ } else
+ (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
+ 0, 0, 0);
+ pmc->sflist = newpsl;
+ pmc->sfmode = msf->imsf_fmode;
+done:
+ rtnl_shunlock();
+ return err;
+}
+
+int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
+ struct ip_msfilter *optval, int *optlen)
+{
+ int err, len, count, copycount;
+ struct ip_mreqn imr;
+ u32 addr = msf->imsf_multiaddr;
+ struct ip_mc_socklist *pmc;
+ struct in_device *in_dev;
+ struct inet_opt *inet = inet_sk(sk);
+ struct ip_sf_socklist *psl;
+
+ if (!MULTICAST(addr))
+ return -EINVAL;
+ if (msf->imsf_fmode != MCAST_INCLUDE &&
+ msf->imsf_fmode != MCAST_EXCLUDE)
+ return -EINVAL;
+
+ rtnl_shlock();
+
+ imr.imr_multiaddr.s_addr = msf->imsf_multiaddr;
+ imr.imr_address.s_addr = msf->imsf_interface;
+ imr.imr_ifindex = 0;
+ in_dev = ip_mc_find_dev(&imr);
+
+ if (!in_dev) {
+ err = -ENODEV;
+ goto done;
+ }
+ err = -EADDRNOTAVAIL;
+
+ for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
+ if (memcmp(&pmc->multi, &imr, sizeof(imr)) == 0)
+ break;
+ }
+ if (!pmc) /* must have a prior join */
+ goto done;
+ msf->imsf_fmode = pmc->sfmode;
+ psl = pmc->sflist;
+ rtnl_shunlock();
+ if (!psl) {
+ len = 0;
+ count = 0;
+ } else {
+ count = psl->sl_count;
+ }
+ copycount = count < msf->imsf_numsrc ? count : msf->imsf_numsrc;
+ len = copycount * sizeof(psl->sl_addr[0]);
+ msf->imsf_numsrc = count;
+ if (put_user(IP_MSFILTER_SIZE(copycount), optlen) ||
+ copy_to_user((void *)optval, msf, IP_MSFILTER_SIZE(0))) {
+ return -EFAULT;
+ }
+ if (len &&
+ copy_to_user((void *)&optval->imsf_slist[0], psl->sl_addr, len))
+ return -EFAULT;
+ return 0;
+done:
+ rtnl_shunlock();
+ return err;
+}
+
+/*
+ * check if a multicast source filter allows delivery for a given <src,dst,intf>
+ */
+int ip_mc_sf_allow(struct sock *sk, u32 loc_addr, u32 rmt_addr, int dif)
+{
+ struct inet_opt *inet = inet_sk(sk);
+ struct ip_mc_socklist *pmc;
+ struct ip_sf_socklist *psl;
+ int i;
+
+ for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
+ if (pmc->multi.imr_multiaddr.s_addr == loc_addr &&
+ pmc->multi.imr_ifindex == dif)
+ break;
+ }
+ if (!pmc)
+ return 0;
+ psl = pmc->sflist;
+ if (!psl)
+ return pmc->sfmode == MCAST_EXCLUDE;
+
+ for (i=0; i<psl->sl_count; i++) {
+ if (psl->sl_addr[i] == rmt_addr)
+ break;
+ }
+ if (pmc->sfmode == MCAST_INCLUDE && i < psl->sl_count)
+ return 1;
+ if (pmc->sfmode == MCAST_EXCLUDE && i >= psl->sl_count)
+ return 1;
+ return 0;
+}
+
/*
* A socket is closing.
*/
inet->mc_list = iml->next;
if ((in_dev = inetdev_by_index(iml->multi.imr_ifindex)) != NULL) {
+ (void) ip_mc_leave_src(sk, iml, in_dev);
ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr);
in_dev_put(in_dev);
}
rtnl_unlock();
}
-int ip_check_mc(struct in_device *in_dev, u32 mc_addr)
+int ip_check_mc(struct in_device *in_dev, u32 mc_addr, u32 src_addr, u16 proto)
{
struct ip_mc_list *im;
+ struct ip_sf_list *psf;
+ int rv = 0;
read_lock(&in_dev->lock);
for (im=in_dev->mc_list; im; im=im->next) {
- if (im->multiaddr == mc_addr) {
- read_unlock(&in_dev->lock);
- return 1;
+ if (im->multiaddr == mc_addr)
+ break;
+ }
+ if (im && proto == IPPROTO_IGMP) {
+ rv = 1;
+ } else if (im) {
+ for (psf=im->sources; psf; psf=psf->sf_next) {
+ if (psf->sf_inaddr == src_addr)
+ break;
}
+ if (psf)
+ rv = psf->sf_count[MCAST_INCLUDE] ||
+ psf->sf_count[MCAST_EXCLUDE] !=
+ im->sfcount[MCAST_EXCLUDE];
+ else
+ rv = im->sfcount[MCAST_EXCLUDE] != 0;
}
read_unlock(&in_dev->lock);
- return 0;
+ return rv;
}
len=0;
return len;
}
+
+int ip_mcf_procinfo(char *buffer, char **start, off_t offset, int length)
+{
+ off_t pos=0, begin=0;
+ int len=0;
+ int first = 1;
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ for(dev=dev_base; dev; dev=dev->next) {
+ struct in_device *in_dev = in_dev_get(dev);
+ struct ip_mc_list *imc;
+
+ if (in_dev == NULL)
+ continue;
+
+ read_lock(&in_dev->lock);
+
+ for (imc=in_dev->mc_list; imc; imc=imc->next) {
+ struct ip_sf_list *psf;
+ unsigned long icount, xcount;
+
+ spin_lock_bh(&imc->lock);
+ icount = imc->sfcount[MCAST_INCLUDE];
+ xcount = imc->sfcount[MCAST_EXCLUDE];
+ for (psf=imc->sources; psf; psf=psf->sf_next) {
+ if (first) {
+ len += sprintf(buffer+len, "%3s %6s "
+ "%10s %10s %6s %6s\n", "Idx",
+ "Device", "MCA", "SRC", "INC",
+ "EXC");
+ first = 0;
+ }
+ len += sprintf(buffer+len, "%3d %6.6s 0x%08x "
+ "0x%08x %6lu %6lu\n", dev->ifindex,
+ dev->name, ntohl(imc->multiaddr),
+ ntohl(psf->sf_inaddr),
+ psf->sf_count[MCAST_INCLUDE],
+ psf->sf_count[MCAST_EXCLUDE]);
+ pos=begin+len;
+ if(pos<offset)
+ {
+ len=0;
+ begin=pos;
+ }
+ if(pos>offset+length) {
+ spin_unlock_bh(&imc->lock);
+ read_unlock(&in_dev->lock);
+ in_dev_put(in_dev);
+ goto done;
+ }
+ icount -= psf->sf_count[MCAST_INCLUDE];
+ xcount -= psf->sf_count[MCAST_EXCLUDE];
+ }
+ if (icount > 0 || xcount > 0) {
+ if (first) {
+ len += sprintf(buffer+len, "%3s %6s "
+ "%10s %10s %6s %6s\n", "Idx",
+ "Device", "MCA", "SRC", "INC",
+ "EXC");
+ first = 0;
+ }
+ len += sprintf(buffer+len, "%3d %6.6s 0x%08x "
+ "%10s %6lu %6lu\n", dev->ifindex,
+ dev->name, ntohl(imc->multiaddr),
+ "NONE", icount, xcount);
+ pos=begin+len;
+ if(pos<offset)
+ {
+ len=0;
+ begin=pos;
+ }
+ if(pos>offset+length) {
+ spin_unlock_bh(&imc->lock);
+ read_unlock(&in_dev->lock);
+ in_dev_put(in_dev);
+ goto done;
+ }
+ }
+ spin_unlock_bh(&imc->lock);
+ }
+ read_unlock(&in_dev->lock);
+ in_dev_put(in_dev);
+ }
+done:
+ read_unlock(&dev_base_lock);
+
+ *start=buffer+(offset-begin);
+ len-=(offset-begin);
+ if(len>length)
+ len=length;
+ if(len<0)
+ len=0;
+ return len;
+}
+
#endif
projects / linux / commitdiff