#include <linux/sockios.h>
#include <linux/types.h>
-/*
- * Based on the MROUTING 3.5 defines primarily to keep
- * source compatibility with BSD.
+/* Based on the MROUTING 3.5 defines primarily to keep
+ * source compatibility with BSD.
*
- * See the mrouted code for the original history.
- *
- * Protocol Independent Multicast (PIM) data structures included
- * Carlos Picoto (cap@di.fc.ul.pt)
+ * See the mrouted code for the original history.
*
+ * Protocol Independent Multicast (PIM) data structures included
+ * Carlos Picoto (cap@di.fc.ul.pt)
*/
#define MRT_BASE 200
#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
-#define MAXVIFS 32
+#define MAXVIFS 32
typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
typedef unsigned short vifi_t;
#define ALL_VIFS ((vifi_t)(-1))
-/*
- * Same idea as select
- */
-
+/* Same idea as select */
+
#define VIFM_SET(n,m) ((m)|=(1<<(n)))
#define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
#define VIFM_ISSET(n,m) ((m)&(1<<(n)))
#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
#define VIFM_SAME(m1,m2) ((m1)==(m2))
-/*
- * Passed by mrouted for an MRT_ADD_VIF - again we use the
- * mrouted 3.6 structures for compatibility
+/* Passed by mrouted for an MRT_ADD_VIF - again we use the
+ * mrouted 3.6 structures for compatibility
*/
-
struct vifctl {
vifi_t vifc_vifi; /* Index of VIF */
unsigned char vifc_flags; /* VIFF_ flags */
#define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of
vifc_lcl_addr to find an interface */
-/*
- * Cache manipulation structures for mrouted and PIMd
- */
-
+/* Cache manipulation structures for mrouted and PIMd */
struct mfcctl {
struct in_addr mfcc_origin; /* Origin of mcast */
struct in_addr mfcc_mcastgrp; /* Group in question */
int mfcc_expire;
};
-/*
- * Group count retrieval for mrouted
- */
-
+/* Group count retrieval for mrouted */
struct sioc_sg_req {
struct in_addr src;
struct in_addr grp;
unsigned long wrong_if;
};
-/*
- * To get vif packet counts
- */
-
+/* To get vif packet counts */
struct sioc_vif_req {
vifi_t vifi; /* Which iface */
unsigned long icount; /* In packets */
unsigned long obytes; /* Out bytes */
};
-/*
- * This is the format the mroute daemon expects to see IGMP control
- * data. Magically happens to be like an IP packet as per the original
+/* This is the format the mroute daemon expects to see IGMP control
+ * data. Magically happens to be like an IP packet as per the original
*/
-
struct igmpmsg {
__u32 unused1,unused2;
unsigned char im_msgtype; /* What is this */
struct in_addr im_src,im_dst;
};
-/*
- * That's all usermode folks
- */
-
-
+/* That's all usermode folks */
#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
-/*
- * Pseudo messages used by mrouted
- */
-
+/* Pseudo messages used by mrouted */
#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
-
#endif /* _UAPI__LINUX_MROUTE_H */
static DEFINE_RWLOCK(mrt_lock);
-/*
- * Multicast router control variables
- */
+/* Multicast router control variables */
#define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
}
}
-static
-struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
+static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
{
struct net_device *dev;
struct iphdr *encap;
encap = (struct iphdr *)(skb_transport_header(skb) + pimlen);
- /*
- * Check that:
+ /* Check that:
* a. packet is really sent to a multicast group
* b. packet is not a NULL-REGISTER
* c. packet is not truncated
* vif_delete - Delete a VIF entry
* @notify: Set to 1, if the caller is a notifier_call
*/
-
static int vif_delete(struct mr_table *mrt, int vifi, int notify,
struct list_head *head)
{
/* Destroy an unresolved cache entry, killing queued skbs
* and reporting error to netlink readers.
*/
-
static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
{
struct net *net = read_pnet(&mrt->net);
ipmr_cache_free(c);
}
-
/* Timer process for the unresolved queue. */
-
static void ipmr_expire_process(unsigned long arg)
{
struct mr_table *mrt = (struct mr_table *)arg;
}
/* Fill oifs list. It is called under write locked mrt_lock. */
-
static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache,
unsigned char *ttls)
{
return err;
}
break;
-
case VIFF_USE_IFINDEX:
case 0:
if (vifc->vifc_flags == VIFF_USE_IFINDEX) {
return ipmr_cache_find_any_parent(mrt, vifi);
}
-/*
- * Allocate a multicast cache entry
- */
+/* Allocate a multicast cache entry */
static struct mfc_cache *ipmr_cache_alloc(void)
{
struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
return c;
}
-/*
- * A cache entry has gone into a resolved state from queued
- */
-
+/* A cache entry has gone into a resolved state from queued */
static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt,
struct mfc_cache *uc, struct mfc_cache *c)
{
struct nlmsgerr *e;
/* Play the pending entries through our router */
-
while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
if (ip_hdr(skb)->version == 0) {
struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr));
return ret;
}
-/*
- * Queue a packet for resolution. It gets locked cache entry!
- */
-
-static int
-ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb)
+/* Queue a packet for resolution. It gets locked cache entry! */
+static int ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi,
+ struct sk_buff *skb)
{
bool found = false;
int err;
if (!found) {
/* Create a new entry if allowable */
-
if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
(c = ipmr_cache_alloc_unres()) == NULL) {
spin_unlock_bh(&mfc_unres_lock);
}
/* Fill in the new cache entry */
-
c->mfc_parent = -1;
c->mfc_origin = iph->saddr;
c->mfc_mcastgrp = iph->daddr;
/* Reflect first query at mrouted. */
-
err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE);
if (err < 0) {
/* If the report failed throw the cache entry
}
/* See if we can append the packet */
-
if (c->mfc_un.unres.unresolved.qlen > 3) {
kfree_skb(skb);
err = -ENOBUFS;
return err;
}
-/*
- * MFC cache manipulation by user space mroute daemon
- */
+/* MFC cache manipulation by user space mroute daemon */
static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent)
{
list_add_rcu(&c->list, &mrt->mfc_cache_array[line]);
- /*
- * Check to see if we resolved a queued list. If so we
- * need to send on the frames and tidy up.
+ /* Check to see if we resolved a queued list. If so we
+ * need to send on the frames and tidy up.
*/
found = false;
spin_lock_bh(&mfc_unres_lock);
return 0;
}
-/*
- * Close the multicast socket, and clear the vif tables etc
- */
-
+/* Close the multicast socket, and clear the vif tables etc */
static void mroute_clean_tables(struct mr_table *mrt)
{
int i;
struct mfc_cache *c, *next;
/* Shut down all active vif entries */
-
for (i = 0; i < mrt->maxvif; i++) {
if (!(mrt->vif_table[i].flags & VIFF_STATIC))
vif_delete(mrt, i, 0, &list);
unregister_netdevice_many(&list);
/* Wipe the cache */
-
for (i = 0; i < MFC_LINES; i++) {
list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) {
if (c->mfc_flags & MFC_STATIC)
rtnl_unlock();
}
-/*
- * Socket options and virtual interface manipulation. The whole
- * virtual interface system is a complete heap, but unfortunately
- * that's how BSD mrouted happens to think. Maybe one day with a proper
- * MOSPF/PIM router set up we can clean this up.
+/* Socket options and virtual interface manipulation. The whole
+ * virtual interface system is a complete heap, but unfortunately
+ * that's how BSD mrouted happens to think. Maybe one day with a proper
+ * MOSPF/PIM router set up we can clean this up.
*/
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
rtnl_unlock();
return ret;
- /*
- * Manipulate the forwarding caches. These live
- * in a sort of kernel/user symbiosis.
- */
+ /* Manipulate the forwarding caches. These live
+ * in a sort of kernel/user symbiosis.
+ */
case MRT_ADD_MFC:
case MRT_DEL_MFC:
parent = -1;
parent);
rtnl_unlock();
return ret;
- /*
- * Control PIM assert.
- */
+ /* Control PIM assert. */
case MRT_ASSERT:
{
int v;
return ret;
}
#endif
- /*
- * Spurious command, or MRT_VERSION which you cannot
- * set.
- */
+ /* Spurious command, or MRT_VERSION which you cannot set. */
default:
return -ENOPROTOOPT;
}
}
-/*
- * Getsock opt support for the multicast routing system.
- */
-
+/* Getsock opt support for the multicast routing system. */
int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen)
{
int olr;
return 0;
}
-/*
- * The IP multicast ioctl support routines.
- */
-
+/* The IP multicast ioctl support routines. */
int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
{
struct sioc_sg_req sr;
}
#endif
-
static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
return NOTIFY_DONE;
}
-
static struct notifier_block ip_mr_notifier = {
.notifier_call = ipmr_device_event,
};
-/*
- * Encapsulate a packet by attaching a valid IPIP header to it.
- * This avoids tunnel drivers and other mess and gives us the speed so
- * important for multicast video.
+/* Encapsulate a packet by attaching a valid IPIP header to it.
+ * This avoids tunnel drivers and other mess and gives us the speed so
+ * important for multicast video.
*/
-
static void ip_encap(struct net *net, struct sk_buff *skb,
__be32 saddr, __be32 daddr)
{
return dst_output(net, sk, skb);
}
-/*
- * Processing handlers for ipmr_forward
- */
+/* Processing handlers for ipmr_forward */
static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *c, int vifi)
* allow to send ICMP, so that packets will disappear
* to blackhole.
*/
-
IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
ip_rt_put(rt);
goto out_free;
IPCB(skb)->flags |= IPSKB_FORWARDED;
- /*
- * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
+ /* RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
* not only before forwarding, but after forwarding on all output
* interfaces. It is clear, if mrouter runs a multicasting
* program, it should receive packets not depending to what interface
}
/* "local" means that we should preserve one skb (for local delivery) */
-
static void ip_mr_forward(struct net *net, struct mr_table *mrt,
struct sk_buff *skb, struct mfc_cache *cache,
int local)
goto forward;
}
- /*
- * Wrong interface: drop packet and (maybe) send PIM assert.
- */
+ /* Wrong interface: drop packet and (maybe) send PIM assert. */
if (mrt->vif_table[vif].dev != skb->dev) {
if (rt_is_output_route(skb_rtable(skb))) {
/* It is our own packet, looped back.
mrt->vif_table[vif].pkt_in++;
mrt->vif_table[vif].bytes_in += skb->len;
- /*
- * Forward the frame
- */
+ /* Forward the frame */
if (cache->mfc_origin == htonl(INADDR_ANY) &&
cache->mfc_mcastgrp == htonl(INADDR_ANY)) {
if (true_vifi >= 0 &&
return mrt;
}
-/*
- * Multicast packets for forwarding arrive here
- * Called with rcu_read_lock();
+/* Multicast packets for forwarding arrive here
+ * Called with rcu_read_lock();
*/
-
int ip_mr_input(struct sk_buff *skb)
{
struct mfc_cache *cache;
vif);
}
- /*
- * No usable cache entry
- */
+ /* No usable cache entry */
if (!cache) {
int vif;
}
#ifdef CONFIG_IP_PIMSM_V1
-/*
- * Handle IGMP messages of PIMv1
- */
-
+/* Handle IGMP messages of PIMv1 */
int pim_rcv_v1(struct sk_buff *skb)
{
struct igmphdr *pim;
}
#ifdef CONFIG_PROC_FS
-/*
- * The /proc interfaces to multicast routing :
- * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
+/* The /proc interfaces to multicast routing :
+ * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif
*/
struct ipmr_vif_iter {
struct seq_net_private p;
};
#endif
-
-/*
- * Setup for IP multicast routing
- */
+/* Setup for IP multicast routing */
static int __net_init ipmr_net_init(struct net *net)
{
int err;
projects / cascardo / linux.git / commitdiff