11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * IP multicast routing support for mrouted 3.6/3.8 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * (c) 1995 Alan Cox, <alan@redhat.com> 51da177e4SLinus Torvalds * Linux Consultancy and Custom Driver Development 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 81da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 91da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 101da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Version: $Id: ipmr.c,v 1.65 2001/10/31 21:55:54 davem Exp $ 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * Fixes: 151da177e4SLinus Torvalds * Michael Chastain : Incorrect size of copying. 161da177e4SLinus Torvalds * Alan Cox : Added the cache manager code 171da177e4SLinus Torvalds * Alan Cox : Fixed the clone/copy bug and device race. 181da177e4SLinus Torvalds * Mike McLagan : Routing by source 191da177e4SLinus Torvalds * Malcolm Beattie : Buffer handling fixes. 201da177e4SLinus Torvalds * Alexey Kuznetsov : Double buffer free and other fixes. 211da177e4SLinus Torvalds * SVR Anand : Fixed several multicast bugs and problems. 221da177e4SLinus Torvalds * Alexey Kuznetsov : Status, optimisations and more. 231da177e4SLinus Torvalds * Brad Parker : Better behaviour on mrouted upcall 241da177e4SLinus Torvalds * overflow. 251da177e4SLinus Torvalds * Carlos Picoto : PIMv1 Support 261da177e4SLinus Torvalds * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header 271da177e4SLinus Torvalds * Relax this requrement to work with older peers. 281da177e4SLinus Torvalds * 291da177e4SLinus Torvalds */ 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include <asm/system.h> 321da177e4SLinus Torvalds #include <asm/uaccess.h> 331da177e4SLinus Torvalds #include <linux/types.h> 344fc268d2SRandy Dunlap #include <linux/capability.h> 351da177e4SLinus Torvalds #include <linux/errno.h> 361da177e4SLinus Torvalds #include <linux/timer.h> 371da177e4SLinus Torvalds #include <linux/mm.h> 381da177e4SLinus Torvalds #include <linux/kernel.h> 391da177e4SLinus Torvalds #include <linux/fcntl.h> 401da177e4SLinus Torvalds #include <linux/stat.h> 411da177e4SLinus Torvalds #include <linux/socket.h> 421da177e4SLinus Torvalds #include <linux/in.h> 431da177e4SLinus Torvalds #include <linux/inet.h> 441da177e4SLinus Torvalds #include <linux/netdevice.h> 451da177e4SLinus Torvalds #include <linux/inetdevice.h> 461da177e4SLinus Torvalds #include <linux/igmp.h> 471da177e4SLinus Torvalds #include <linux/proc_fs.h> 481da177e4SLinus Torvalds #include <linux/seq_file.h> 491da177e4SLinus Torvalds #include <linux/mroute.h> 501da177e4SLinus Torvalds #include <linux/init.h> 5146f25dffSKris Katterjohn #include <linux/if_ether.h> 521da177e4SLinus Torvalds #include <net/ip.h> 531da177e4SLinus Torvalds #include <net/protocol.h> 541da177e4SLinus Torvalds #include <linux/skbuff.h> 5514c85021SArnaldo Carvalho de Melo #include <net/route.h> 561da177e4SLinus Torvalds #include <net/sock.h> 571da177e4SLinus Torvalds #include <net/icmp.h> 581da177e4SLinus Torvalds #include <net/udp.h> 591da177e4SLinus Torvalds #include <net/raw.h> 601da177e4SLinus Torvalds #include <linux/notifier.h> 611da177e4SLinus Torvalds #include <linux/if_arp.h> 621da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 631da177e4SLinus Torvalds #include <net/ipip.h> 641da177e4SLinus Torvalds #include <net/checksum.h> 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) 671da177e4SLinus Torvalds #define CONFIG_IP_PIMSM 1 681da177e4SLinus Torvalds #endif 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static struct sock *mroute_socket; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds /* Big lock, protecting vif table, mrt cache and mroute socket state. 741da177e4SLinus Torvalds Note that the changes are semaphored via rtnl_lock. 751da177e4SLinus Torvalds */ 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static DEFINE_RWLOCK(mrt_lock); 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds /* 801da177e4SLinus Torvalds * Multicast router control variables 811da177e4SLinus Torvalds */ 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds static struct vif_device vif_table[MAXVIFS]; /* Devices */ 841da177e4SLinus Torvalds static int maxvif; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds #define VIF_EXISTS(idx) (vif_table[idx].dev != NULL) 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static int mroute_do_assert; /* Set in PIM assert */ 891da177e4SLinus Torvalds static int mroute_do_pim; 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds static struct mfc_cache *mfc_cache_array[MFC_LINES]; /* Forwarding cache */ 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds static struct mfc_cache *mfc_unres_queue; /* Queue of unresolved entries */ 941da177e4SLinus Torvalds static atomic_t cache_resolve_queue_len; /* Size of unresolved */ 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds /* Special spinlock for queue of unresolved entries */ 971da177e4SLinus Torvalds static DEFINE_SPINLOCK(mfc_unres_lock); 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds /* We return to original Alan's scheme. Hash table of resolved 1001da177e4SLinus Torvalds entries is changed only in process context and protected 1011da177e4SLinus Torvalds with weak lock mrt_lock. Queue of unresolved entries is protected 1021da177e4SLinus Torvalds with strong spinlock mfc_unres_lock. 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds In this case data path is free of exclusive locks at all. 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds 107e18b890bSChristoph Lameter static struct kmem_cache *mrt_cachep __read_mostly; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local); 1101da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert); 1111da177e4SLinus Torvalds static int ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm); 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 1141da177e4SLinus Torvalds static struct net_protocol pim_protocol; 1151da177e4SLinus Torvalds #endif 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static struct timer_list ipmr_expire_timer; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static 1221da177e4SLinus Torvalds struct net_device *ipmr_new_tunnel(struct vifctl *v) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds struct net_device *dev; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds dev = __dev_get_by_name("tunl0"); 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds if (dev) { 1291da177e4SLinus Torvalds int err; 1301da177e4SLinus Torvalds struct ifreq ifr; 1311da177e4SLinus Torvalds mm_segment_t oldfs; 1321da177e4SLinus Torvalds struct ip_tunnel_parm p; 1331da177e4SLinus Torvalds struct in_device *in_dev; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 1361da177e4SLinus Torvalds p.iph.daddr = v->vifc_rmt_addr.s_addr; 1371da177e4SLinus Torvalds p.iph.saddr = v->vifc_lcl_addr.s_addr; 1381da177e4SLinus Torvalds p.iph.version = 4; 1391da177e4SLinus Torvalds p.iph.ihl = 5; 1401da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPIP; 1411da177e4SLinus Torvalds sprintf(p.name, "dvmrp%d", v->vifc_vifi); 1421da177e4SLinus Torvalds ifr.ifr_ifru.ifru_data = (void*)&p; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds oldfs = get_fs(); set_fs(KERNEL_DS); 1451da177e4SLinus Torvalds err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); 1461da177e4SLinus Torvalds set_fs(oldfs); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds dev = NULL; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds if (err == 0 && (dev = __dev_get_by_name(p.name)) != NULL) { 1511da177e4SLinus Torvalds dev->flags |= IFF_MULTICAST; 1521da177e4SLinus Torvalds 153e5ed6399SHerbert Xu in_dev = __in_dev_get_rtnl(dev); 1541da177e4SLinus Torvalds if (in_dev == NULL && (in_dev = inetdev_init(dev)) == NULL) 1551da177e4SLinus Torvalds goto failure; 1561da177e4SLinus Torvalds in_dev->cnf.rp_filter = 0; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds if (dev_open(dev)) 1591da177e4SLinus Torvalds goto failure; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds return dev; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds failure: 1651da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 1661da177e4SLinus Torvalds rtnl_unlock(); 1671da177e4SLinus Torvalds rtnl_lock(); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds unregister_netdevice(dev); 1701da177e4SLinus Torvalds return NULL; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static int reg_vif_num = -1; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds read_lock(&mrt_lock); 1802941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(dev))->tx_bytes += skb->len; 1812941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(dev))->tx_packets++; 1821da177e4SLinus Torvalds ipmr_cache_report(skb, reg_vif_num, IGMPMSG_WHOLEPKT); 1831da177e4SLinus Torvalds read_unlock(&mrt_lock); 1841da177e4SLinus Torvalds kfree_skb(skb); 1851da177e4SLinus Torvalds return 0; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds static struct net_device_stats *reg_vif_get_stats(struct net_device *dev) 1891da177e4SLinus Torvalds { 1902941a486SPatrick McHardy return (struct net_device_stats*)netdev_priv(dev); 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds static void reg_vif_setup(struct net_device *dev) 1941da177e4SLinus Torvalds { 1951da177e4SLinus Torvalds dev->type = ARPHRD_PIMREG; 19646f25dffSKris Katterjohn dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; 1971da177e4SLinus Torvalds dev->flags = IFF_NOARP; 1981da177e4SLinus Torvalds dev->hard_start_xmit = reg_vif_xmit; 1991da177e4SLinus Torvalds dev->get_stats = reg_vif_get_stats; 2001da177e4SLinus Torvalds dev->destructor = free_netdev; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds static struct net_device *ipmr_reg_vif(void) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds struct net_device *dev; 2061da177e4SLinus Torvalds struct in_device *in_dev; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds dev = alloc_netdev(sizeof(struct net_device_stats), "pimreg", 2091da177e4SLinus Torvalds reg_vif_setup); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds if (dev == NULL) 2121da177e4SLinus Torvalds return NULL; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds if (register_netdevice(dev)) { 2151da177e4SLinus Torvalds free_netdev(dev); 2161da177e4SLinus Torvalds return NULL; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds dev->iflink = 0; 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds if ((in_dev = inetdev_init(dev)) == NULL) 2211da177e4SLinus Torvalds goto failure; 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds in_dev->cnf.rp_filter = 0; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds if (dev_open(dev)) 2261da177e4SLinus Torvalds goto failure; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds return dev; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds failure: 2311da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 2321da177e4SLinus Torvalds rtnl_unlock(); 2331da177e4SLinus Torvalds rtnl_lock(); 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds unregister_netdevice(dev); 2361da177e4SLinus Torvalds return NULL; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds #endif 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds /* 2411da177e4SLinus Torvalds * Delete a VIF entry 2421da177e4SLinus Torvalds */ 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds static int vif_delete(int vifi) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds struct vif_device *v; 2471da177e4SLinus Torvalds struct net_device *dev; 2481da177e4SLinus Torvalds struct in_device *in_dev; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds if (vifi < 0 || vifi >= maxvif) 2511da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds v = &vif_table[vifi]; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 2561da177e4SLinus Torvalds dev = v->dev; 2571da177e4SLinus Torvalds v->dev = NULL; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds if (!dev) { 2601da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2611da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 2651da177e4SLinus Torvalds if (vifi == reg_vif_num) 2661da177e4SLinus Torvalds reg_vif_num = -1; 2671da177e4SLinus Torvalds #endif 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds if (vifi+1 == maxvif) { 2701da177e4SLinus Torvalds int tmp; 2711da177e4SLinus Torvalds for (tmp=vifi-1; tmp>=0; tmp--) { 2721da177e4SLinus Torvalds if (VIF_EXISTS(tmp)) 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds maxvif = tmp+1; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds dev_set_allmulti(dev, -1); 2811da177e4SLinus Torvalds 282e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { 2831da177e4SLinus Torvalds in_dev->cnf.mc_forwarding--; 2841da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 2881da177e4SLinus Torvalds unregister_netdevice(dev); 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds dev_put(dev); 2911da177e4SLinus Torvalds return 0; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds /* Destroy an unresolved cache entry, killing queued skbs 2951da177e4SLinus Torvalds and reporting error to netlink readers. 2961da177e4SLinus Torvalds */ 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds static void ipmr_destroy_unres(struct mfc_cache *c) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds struct sk_buff *skb; 3019ef1d4c7SPatrick McHardy struct nlmsgerr *e; 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds atomic_dec(&cache_resolve_queue_len); 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds while ((skb=skb_dequeue(&c->mfc_un.unres.unresolved))) { 3061da177e4SLinus Torvalds if (skb->nh.iph->version == 0) { 3071da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 3081da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 3091da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 3101da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 3119ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 3129ef1d4c7SPatrick McHardy e->error = -ETIMEDOUT; 3139ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 3142942e900SThomas Graf 3152942e900SThomas Graf rtnl_unicast(skb, NETLINK_CB(skb).pid); 3161da177e4SLinus Torvalds } else 3171da177e4SLinus Torvalds kfree_skb(skb); 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds /* Single timer process for all the unresolved queue. */ 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds static void ipmr_expire_process(unsigned long dummy) 3271da177e4SLinus Torvalds { 3281da177e4SLinus Torvalds unsigned long now; 3291da177e4SLinus Torvalds unsigned long expires; 3301da177e4SLinus Torvalds struct mfc_cache *c, **cp; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds if (!spin_trylock(&mfc_unres_lock)) { 3331da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies+HZ/10); 3341da177e4SLinus Torvalds return; 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) == 0) 3381da177e4SLinus Torvalds goto out; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds now = jiffies; 3411da177e4SLinus Torvalds expires = 10*HZ; 3421da177e4SLinus Torvalds cp = &mfc_unres_queue; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds while ((c=*cp) != NULL) { 3451da177e4SLinus Torvalds if (time_after(c->mfc_un.unres.expires, now)) { 3461da177e4SLinus Torvalds unsigned long interval = c->mfc_un.unres.expires - now; 3471da177e4SLinus Torvalds if (interval < expires) 3481da177e4SLinus Torvalds expires = interval; 3491da177e4SLinus Torvalds cp = &c->next; 3501da177e4SLinus Torvalds continue; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds *cp = c->next; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds ipmr_destroy_unres(c); 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)) 3591da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies + expires); 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds out: 3621da177e4SLinus Torvalds spin_unlock(&mfc_unres_lock); 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds /* Fill oifs list. It is called under write locked mrt_lock. */ 3661da177e4SLinus Torvalds 367d1b04c08SBaruch Even static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls) 3681da177e4SLinus Torvalds { 3691da177e4SLinus Torvalds int vifi; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds cache->mfc_un.res.minvif = MAXVIFS; 3721da177e4SLinus Torvalds cache->mfc_un.res.maxvif = 0; 3731da177e4SLinus Torvalds memset(cache->mfc_un.res.ttls, 255, MAXVIFS); 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds for (vifi=0; vifi<maxvif; vifi++) { 3761da177e4SLinus Torvalds if (VIF_EXISTS(vifi) && ttls[vifi] && ttls[vifi] < 255) { 3771da177e4SLinus Torvalds cache->mfc_un.res.ttls[vifi] = ttls[vifi]; 3781da177e4SLinus Torvalds if (cache->mfc_un.res.minvif > vifi) 3791da177e4SLinus Torvalds cache->mfc_un.res.minvif = vifi; 3801da177e4SLinus Torvalds if (cache->mfc_un.res.maxvif <= vifi) 3811da177e4SLinus Torvalds cache->mfc_un.res.maxvif = vifi + 1; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds static int vif_add(struct vifctl *vifc, int mrtsock) 3871da177e4SLinus Torvalds { 3881da177e4SLinus Torvalds int vifi = vifc->vifc_vifi; 3891da177e4SLinus Torvalds struct vif_device *v = &vif_table[vifi]; 3901da177e4SLinus Torvalds struct net_device *dev; 3911da177e4SLinus Torvalds struct in_device *in_dev; 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* Is vif busy ? */ 3941da177e4SLinus Torvalds if (VIF_EXISTS(vifi)) 3951da177e4SLinus Torvalds return -EADDRINUSE; 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds switch (vifc->vifc_flags) { 3981da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 3991da177e4SLinus Torvalds case VIFF_REGISTER: 4001da177e4SLinus Torvalds /* 4011da177e4SLinus Torvalds * Special Purpose VIF in PIM 4021da177e4SLinus Torvalds * All the packets will be sent to the daemon 4031da177e4SLinus Torvalds */ 4041da177e4SLinus Torvalds if (reg_vif_num >= 0) 4051da177e4SLinus Torvalds return -EADDRINUSE; 4061da177e4SLinus Torvalds dev = ipmr_reg_vif(); 4071da177e4SLinus Torvalds if (!dev) 4081da177e4SLinus Torvalds return -ENOBUFS; 4091da177e4SLinus Torvalds break; 4101da177e4SLinus Torvalds #endif 4111da177e4SLinus Torvalds case VIFF_TUNNEL: 4121da177e4SLinus Torvalds dev = ipmr_new_tunnel(vifc); 4131da177e4SLinus Torvalds if (!dev) 4141da177e4SLinus Torvalds return -ENOBUFS; 4151da177e4SLinus Torvalds break; 4161da177e4SLinus Torvalds case 0: 4171da177e4SLinus Torvalds dev = ip_dev_find(vifc->vifc_lcl_addr.s_addr); 4181da177e4SLinus Torvalds if (!dev) 4191da177e4SLinus Torvalds return -EADDRNOTAVAIL; 42015333061SStephen Hemminger dev_put(dev); 4211da177e4SLinus Torvalds break; 4221da177e4SLinus Torvalds default: 4231da177e4SLinus Torvalds return -EINVAL; 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds 426e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) 4271da177e4SLinus Torvalds return -EADDRNOTAVAIL; 4281da177e4SLinus Torvalds in_dev->cnf.mc_forwarding++; 4291da177e4SLinus Torvalds dev_set_allmulti(dev, +1); 4301da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* 4331da177e4SLinus Torvalds * Fill in the VIF structures 4341da177e4SLinus Torvalds */ 4351da177e4SLinus Torvalds v->rate_limit=vifc->vifc_rate_limit; 4361da177e4SLinus Torvalds v->local=vifc->vifc_lcl_addr.s_addr; 4371da177e4SLinus Torvalds v->remote=vifc->vifc_rmt_addr.s_addr; 4381da177e4SLinus Torvalds v->flags=vifc->vifc_flags; 4391da177e4SLinus Torvalds if (!mrtsock) 4401da177e4SLinus Torvalds v->flags |= VIFF_STATIC; 4411da177e4SLinus Torvalds v->threshold=vifc->vifc_threshold; 4421da177e4SLinus Torvalds v->bytes_in = 0; 4431da177e4SLinus Torvalds v->bytes_out = 0; 4441da177e4SLinus Torvalds v->pkt_in = 0; 4451da177e4SLinus Torvalds v->pkt_out = 0; 4461da177e4SLinus Torvalds v->link = dev->ifindex; 4471da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 4481da177e4SLinus Torvalds v->link = dev->iflink; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds /* And finish update writing critical data */ 4511da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 4521da177e4SLinus Torvalds dev_hold(dev); 4531da177e4SLinus Torvalds v->dev=dev; 4541da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4551da177e4SLinus Torvalds if (v->flags&VIFF_REGISTER) 4561da177e4SLinus Torvalds reg_vif_num = vifi; 4571da177e4SLinus Torvalds #endif 4581da177e4SLinus Torvalds if (vifi+1 > maxvif) 4591da177e4SLinus Torvalds maxvif = vifi+1; 4601da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 4611da177e4SLinus Torvalds return 0; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 464114c7844SAl Viro static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp) 4651da177e4SLinus Torvalds { 4661da177e4SLinus Torvalds int line=MFC_HASH(mcastgrp,origin); 4671da177e4SLinus Torvalds struct mfc_cache *c; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds for (c=mfc_cache_array[line]; c; c = c->next) { 4701da177e4SLinus Torvalds if (c->mfc_origin==origin && c->mfc_mcastgrp==mcastgrp) 4711da177e4SLinus Torvalds break; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds return c; 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* 4771da177e4SLinus Torvalds * Allocate a multicast cache entry 4781da177e4SLinus Torvalds */ 4791da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc(void) 4801da177e4SLinus Torvalds { 481c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); 4821da177e4SLinus Torvalds if (c==NULL) 4831da177e4SLinus Torvalds return NULL; 4841da177e4SLinus Torvalds c->mfc_un.res.minvif = MAXVIFS; 4851da177e4SLinus Torvalds return c; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc_unres(void) 4891da177e4SLinus Torvalds { 490c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); 4911da177e4SLinus Torvalds if (c==NULL) 4921da177e4SLinus Torvalds return NULL; 4931da177e4SLinus Torvalds skb_queue_head_init(&c->mfc_un.unres.unresolved); 4941da177e4SLinus Torvalds c->mfc_un.unres.expires = jiffies + 10*HZ; 4951da177e4SLinus Torvalds return c; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds /* 4991da177e4SLinus Torvalds * A cache entry has gone into a resolved state from queued 5001da177e4SLinus Torvalds */ 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) 5031da177e4SLinus Torvalds { 5041da177e4SLinus Torvalds struct sk_buff *skb; 5059ef1d4c7SPatrick McHardy struct nlmsgerr *e; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds /* 5081da177e4SLinus Torvalds * Play the pending entries through our router 5091da177e4SLinus Torvalds */ 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds while ((skb=__skb_dequeue(&uc->mfc_un.unres.unresolved))) { 5121da177e4SLinus Torvalds if (skb->nh.iph->version == 0) { 5131da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds if (ipmr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) { 5161da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - (u8*)nlh; 5171da177e4SLinus Torvalds } else { 5181da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 5191da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 5201da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 5219ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 5229ef1d4c7SPatrick McHardy e->error = -EMSGSIZE; 5239ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 5241da177e4SLinus Torvalds } 5252942e900SThomas Graf 5262942e900SThomas Graf rtnl_unicast(skb, NETLINK_CB(skb).pid); 5271da177e4SLinus Torvalds } else 5281da177e4SLinus Torvalds ip_mr_forward(skb, c, 0); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds } 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* 5331da177e4SLinus Torvalds * Bounce a cache query up to mrouted. We could use netlink for this but mrouted 5341da177e4SLinus Torvalds * expects the following bizarre scheme. 5351da177e4SLinus Torvalds * 5361da177e4SLinus Torvalds * Called under mrt_lock. 5371da177e4SLinus Torvalds */ 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert) 5401da177e4SLinus Torvalds { 5411da177e4SLinus Torvalds struct sk_buff *skb; 5421da177e4SLinus Torvalds int ihl = pkt->nh.iph->ihl<<2; 5431da177e4SLinus Torvalds struct igmphdr *igmp; 5441da177e4SLinus Torvalds struct igmpmsg *msg; 5451da177e4SLinus Torvalds int ret; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5481da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) 5491da177e4SLinus Torvalds skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); 5501da177e4SLinus Torvalds else 5511da177e4SLinus Torvalds #endif 5521da177e4SLinus Torvalds skb = alloc_skb(128, GFP_ATOMIC); 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds if (!skb) 5551da177e4SLinus Torvalds return -ENOBUFS; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5581da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) { 5591da177e4SLinus Torvalds /* Ugly, but we have no choice with this interface. 5601da177e4SLinus Torvalds Duplicate old header, fix ihl, length etc. 5611da177e4SLinus Torvalds And all this only to mangle msg->im_msgtype and 5621da177e4SLinus Torvalds to set msg->im_mbz to "mbz" :-) 5631da177e4SLinus Torvalds */ 564*878c8145SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 565*878c8145SArnaldo Carvalho de Melo skb_reset_network_header(skb); 566*878c8145SArnaldo Carvalho de Melo skb->h.raw = skb->data; 567*878c8145SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb->nh.raw; 568d56f90a7SArnaldo Carvalho de Melo memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); 5691da177e4SLinus Torvalds msg->im_msgtype = IGMPMSG_WHOLEPKT; 5701da177e4SLinus Torvalds msg->im_mbz = 0; 5711da177e4SLinus Torvalds msg->im_vif = reg_vif_num; 5721da177e4SLinus Torvalds skb->nh.iph->ihl = sizeof(struct iphdr) >> 2; 5731da177e4SLinus Torvalds skb->nh.iph->tot_len = htons(ntohs(pkt->nh.iph->tot_len) + sizeof(struct iphdr)); 5741da177e4SLinus Torvalds } else 5751da177e4SLinus Torvalds #endif 5761da177e4SLinus Torvalds { 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds /* 5791da177e4SLinus Torvalds * Copy the IP header 5801da177e4SLinus Torvalds */ 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds skb->nh.iph = (struct iphdr *)skb_put(skb, ihl); 5831da177e4SLinus Torvalds memcpy(skb->data,pkt->data,ihl); 5841da177e4SLinus Torvalds skb->nh.iph->protocol = 0; /* Flag to the kernel this is a route add */ 5851da177e4SLinus Torvalds msg = (struct igmpmsg*)skb->nh.iph; 5861da177e4SLinus Torvalds msg->im_vif = vifi; 5871da177e4SLinus Torvalds skb->dst = dst_clone(pkt->dst); 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds /* 5901da177e4SLinus Torvalds * Add our header 5911da177e4SLinus Torvalds */ 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds igmp=(struct igmphdr *)skb_put(skb,sizeof(struct igmphdr)); 5941da177e4SLinus Torvalds igmp->type = 5951da177e4SLinus Torvalds msg->im_msgtype = assert; 5961da177e4SLinus Torvalds igmp->code = 0; 5971da177e4SLinus Torvalds skb->nh.iph->tot_len=htons(skb->len); /* Fix the length */ 5981da177e4SLinus Torvalds skb->h.raw = skb->nh.raw; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds if (mroute_socket == NULL) { 6021da177e4SLinus Torvalds kfree_skb(skb); 6031da177e4SLinus Torvalds return -EINVAL; 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds /* 6071da177e4SLinus Torvalds * Deliver to mrouted 6081da177e4SLinus Torvalds */ 6091da177e4SLinus Torvalds if ((ret=sock_queue_rcv_skb(mroute_socket,skb))<0) { 6101da177e4SLinus Torvalds if (net_ratelimit()) 6111da177e4SLinus Torvalds printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n"); 6121da177e4SLinus Torvalds kfree_skb(skb); 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds return ret; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds /* 6191da177e4SLinus Torvalds * Queue a packet for resolution. It gets locked cache entry! 6201da177e4SLinus Torvalds */ 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds static int 6231da177e4SLinus Torvalds ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb) 6241da177e4SLinus Torvalds { 6251da177e4SLinus Torvalds int err; 6261da177e4SLinus Torvalds struct mfc_cache *c; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 6291da177e4SLinus Torvalds for (c=mfc_unres_queue; c; c=c->next) { 6301da177e4SLinus Torvalds if (c->mfc_mcastgrp == skb->nh.iph->daddr && 6311da177e4SLinus Torvalds c->mfc_origin == skb->nh.iph->saddr) 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds if (c == NULL) { 6361da177e4SLinus Torvalds /* 6371da177e4SLinus Torvalds * Create a new entry if allowable 6381da177e4SLinus Torvalds */ 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)>=10 || 6411da177e4SLinus Torvalds (c=ipmr_cache_alloc_unres())==NULL) { 6421da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds kfree_skb(skb); 6451da177e4SLinus Torvalds return -ENOBUFS; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds /* 6491da177e4SLinus Torvalds * Fill in the new cache entry 6501da177e4SLinus Torvalds */ 6511da177e4SLinus Torvalds c->mfc_parent=-1; 6521da177e4SLinus Torvalds c->mfc_origin=skb->nh.iph->saddr; 6531da177e4SLinus Torvalds c->mfc_mcastgrp=skb->nh.iph->daddr; 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds /* 6561da177e4SLinus Torvalds * Reflect first query at mrouted. 6571da177e4SLinus Torvalds */ 6581da177e4SLinus Torvalds if ((err = ipmr_cache_report(skb, vifi, IGMPMSG_NOCACHE))<0) { 6591da177e4SLinus Torvalds /* If the report failed throw the cache entry 6601da177e4SLinus Torvalds out - Brad Parker 6611da177e4SLinus Torvalds */ 6621da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 6651da177e4SLinus Torvalds kfree_skb(skb); 6661da177e4SLinus Torvalds return err; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds atomic_inc(&cache_resolve_queue_len); 6701da177e4SLinus Torvalds c->next = mfc_unres_queue; 6711da177e4SLinus Torvalds mfc_unres_queue = c; 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires); 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds /* 6771da177e4SLinus Torvalds * See if we can append the packet 6781da177e4SLinus Torvalds */ 6791da177e4SLinus Torvalds if (c->mfc_un.unres.unresolved.qlen>3) { 6801da177e4SLinus Torvalds kfree_skb(skb); 6811da177e4SLinus Torvalds err = -ENOBUFS; 6821da177e4SLinus Torvalds } else { 6831da177e4SLinus Torvalds skb_queue_tail(&c->mfc_un.unres.unresolved,skb); 6841da177e4SLinus Torvalds err = 0; 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6881da177e4SLinus Torvalds return err; 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds /* 6921da177e4SLinus Torvalds * MFC cache manipulation by user space mroute daemon 6931da177e4SLinus Torvalds */ 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds static int ipmr_mfc_delete(struct mfcctl *mfc) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds int line; 6981da177e4SLinus Torvalds struct mfc_cache *c, **cp; 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7031da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7041da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) { 7051da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7061da177e4SLinus Torvalds *cp = c->next; 7071da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 7101da177e4SLinus Torvalds return 0; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds } 7131da177e4SLinus Torvalds return -ENOENT; 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock) 7171da177e4SLinus Torvalds { 7181da177e4SLinus Torvalds int line; 7191da177e4SLinus Torvalds struct mfc_cache *uc, *c, **cp; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7241da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7251da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) 7261da177e4SLinus Torvalds break; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds if (c != NULL) { 7301da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7311da177e4SLinus Torvalds c->mfc_parent = mfc->mfcc_parent; 732d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7331da177e4SLinus Torvalds if (!mrtsock) 7341da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7351da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7361da177e4SLinus Torvalds return 0; 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds if (!MULTICAST(mfc->mfcc_mcastgrp.s_addr)) 7401da177e4SLinus Torvalds return -EINVAL; 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds c=ipmr_cache_alloc(); 7431da177e4SLinus Torvalds if (c==NULL) 7441da177e4SLinus Torvalds return -ENOMEM; 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds c->mfc_origin=mfc->mfcc_origin.s_addr; 7471da177e4SLinus Torvalds c->mfc_mcastgrp=mfc->mfcc_mcastgrp.s_addr; 7481da177e4SLinus Torvalds c->mfc_parent=mfc->mfcc_parent; 749d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7501da177e4SLinus Torvalds if (!mrtsock) 7511da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7541da177e4SLinus Torvalds c->next = mfc_cache_array[line]; 7551da177e4SLinus Torvalds mfc_cache_array[line] = c; 7561da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds /* 7591da177e4SLinus Torvalds * Check to see if we resolved a queued list. If so we 7601da177e4SLinus Torvalds * need to send on the frames and tidy up. 7611da177e4SLinus Torvalds */ 7621da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 7631da177e4SLinus Torvalds for (cp = &mfc_unres_queue; (uc=*cp) != NULL; 7641da177e4SLinus Torvalds cp = &uc->next) { 7651da177e4SLinus Torvalds if (uc->mfc_origin == c->mfc_origin && 7661da177e4SLinus Torvalds uc->mfc_mcastgrp == c->mfc_mcastgrp) { 7671da177e4SLinus Torvalds *cp = uc->next; 7681da177e4SLinus Torvalds if (atomic_dec_and_test(&cache_resolve_queue_len)) 7691da177e4SLinus Torvalds del_timer(&ipmr_expire_timer); 7701da177e4SLinus Torvalds break; 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds if (uc) { 7761da177e4SLinus Torvalds ipmr_cache_resolve(uc, c); 7771da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, uc); 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds return 0; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds /* 7831da177e4SLinus Torvalds * Close the multicast socket, and clear the vif tables etc 7841da177e4SLinus Torvalds */ 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds static void mroute_clean_tables(struct sock *sk) 7871da177e4SLinus Torvalds { 7881da177e4SLinus Torvalds int i; 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds /* 7911da177e4SLinus Torvalds * Shut down all active vif entries 7921da177e4SLinus Torvalds */ 7931da177e4SLinus Torvalds for (i=0; i<maxvif; i++) { 7941da177e4SLinus Torvalds if (!(vif_table[i].flags&VIFF_STATIC)) 7951da177e4SLinus Torvalds vif_delete(i); 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds /* 7991da177e4SLinus Torvalds * Wipe the cache 8001da177e4SLinus Torvalds */ 8011da177e4SLinus Torvalds for (i=0;i<MFC_LINES;i++) { 8021da177e4SLinus Torvalds struct mfc_cache *c, **cp; 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds cp = &mfc_cache_array[i]; 8051da177e4SLinus Torvalds while ((c = *cp) != NULL) { 8061da177e4SLinus Torvalds if (c->mfc_flags&MFC_STATIC) { 8071da177e4SLinus Torvalds cp = &c->next; 8081da177e4SLinus Torvalds continue; 8091da177e4SLinus Torvalds } 8101da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8111da177e4SLinus Torvalds *cp = c->next; 8121da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) != 0) { 8191da177e4SLinus Torvalds struct mfc_cache *c; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8221da177e4SLinus Torvalds while (mfc_unres_queue != NULL) { 8231da177e4SLinus Torvalds c = mfc_unres_queue; 8241da177e4SLinus Torvalds mfc_unres_queue = c->next; 8251da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds ipmr_destroy_unres(c); 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds static void mrtsock_destruct(struct sock *sk) 8361da177e4SLinus Torvalds { 8371da177e4SLinus Torvalds rtnl_lock(); 8381da177e4SLinus Torvalds if (sk == mroute_socket) { 8391da177e4SLinus Torvalds ipv4_devconf.mc_forwarding--; 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8421da177e4SLinus Torvalds mroute_socket=NULL; 8431da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds mroute_clean_tables(sk); 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds rtnl_unlock(); 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds /* 8511da177e4SLinus Torvalds * Socket options and virtual interface manipulation. The whole 8521da177e4SLinus Torvalds * virtual interface system is a complete heap, but unfortunately 8531da177e4SLinus Torvalds * that's how BSD mrouted happens to think. Maybe one day with a proper 8541da177e4SLinus Torvalds * MOSPF/PIM router set up we can clean this up. 8551da177e4SLinus Torvalds */ 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int optlen) 8581da177e4SLinus Torvalds { 8591da177e4SLinus Torvalds int ret; 8601da177e4SLinus Torvalds struct vifctl vif; 8611da177e4SLinus Torvalds struct mfcctl mfc; 8621da177e4SLinus Torvalds 863132adf54SStephen Hemminger if (optname != MRT_INIT) { 8641da177e4SLinus Torvalds if (sk != mroute_socket && !capable(CAP_NET_ADMIN)) 8651da177e4SLinus Torvalds return -EACCES; 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 868132adf54SStephen Hemminger switch (optname) { 8691da177e4SLinus Torvalds case MRT_INIT: 8701da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || 8711da177e4SLinus Torvalds inet_sk(sk)->num != IPPROTO_IGMP) 8721da177e4SLinus Torvalds return -EOPNOTSUPP; 8731da177e4SLinus Torvalds if (optlen!=sizeof(int)) 8741da177e4SLinus Torvalds return -ENOPROTOOPT; 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds rtnl_lock(); 8771da177e4SLinus Torvalds if (mroute_socket) { 8781da177e4SLinus Torvalds rtnl_unlock(); 8791da177e4SLinus Torvalds return -EADDRINUSE; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds ret = ip_ra_control(sk, 1, mrtsock_destruct); 8831da177e4SLinus Torvalds if (ret == 0) { 8841da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8851da177e4SLinus Torvalds mroute_socket=sk; 8861da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds ipv4_devconf.mc_forwarding++; 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds rtnl_unlock(); 8911da177e4SLinus Torvalds return ret; 8921da177e4SLinus Torvalds case MRT_DONE: 8931da177e4SLinus Torvalds if (sk!=mroute_socket) 8941da177e4SLinus Torvalds return -EACCES; 8951da177e4SLinus Torvalds return ip_ra_control(sk, 0, NULL); 8961da177e4SLinus Torvalds case MRT_ADD_VIF: 8971da177e4SLinus Torvalds case MRT_DEL_VIF: 8981da177e4SLinus Torvalds if (optlen!=sizeof(vif)) 8991da177e4SLinus Torvalds return -EINVAL; 9001da177e4SLinus Torvalds if (copy_from_user(&vif,optval,sizeof(vif))) 9011da177e4SLinus Torvalds return -EFAULT; 9021da177e4SLinus Torvalds if (vif.vifc_vifi >= MAXVIFS) 9031da177e4SLinus Torvalds return -ENFILE; 9041da177e4SLinus Torvalds rtnl_lock(); 9051da177e4SLinus Torvalds if (optname==MRT_ADD_VIF) { 9061da177e4SLinus Torvalds ret = vif_add(&vif, sk==mroute_socket); 9071da177e4SLinus Torvalds } else { 9081da177e4SLinus Torvalds ret = vif_delete(vif.vifc_vifi); 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds rtnl_unlock(); 9111da177e4SLinus Torvalds return ret; 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds /* 9141da177e4SLinus Torvalds * Manipulate the forwarding caches. These live 9151da177e4SLinus Torvalds * in a sort of kernel/user symbiosis. 9161da177e4SLinus Torvalds */ 9171da177e4SLinus Torvalds case MRT_ADD_MFC: 9181da177e4SLinus Torvalds case MRT_DEL_MFC: 9191da177e4SLinus Torvalds if (optlen!=sizeof(mfc)) 9201da177e4SLinus Torvalds return -EINVAL; 9211da177e4SLinus Torvalds if (copy_from_user(&mfc,optval, sizeof(mfc))) 9221da177e4SLinus Torvalds return -EFAULT; 9231da177e4SLinus Torvalds rtnl_lock(); 9241da177e4SLinus Torvalds if (optname==MRT_DEL_MFC) 9251da177e4SLinus Torvalds ret = ipmr_mfc_delete(&mfc); 9261da177e4SLinus Torvalds else 9271da177e4SLinus Torvalds ret = ipmr_mfc_add(&mfc, sk==mroute_socket); 9281da177e4SLinus Torvalds rtnl_unlock(); 9291da177e4SLinus Torvalds return ret; 9301da177e4SLinus Torvalds /* 9311da177e4SLinus Torvalds * Control PIM assert. 9321da177e4SLinus Torvalds */ 9331da177e4SLinus Torvalds case MRT_ASSERT: 9341da177e4SLinus Torvalds { 9351da177e4SLinus Torvalds int v; 9361da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9371da177e4SLinus Torvalds return -EFAULT; 9381da177e4SLinus Torvalds mroute_do_assert=(v)?1:0; 9391da177e4SLinus Torvalds return 0; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 9421da177e4SLinus Torvalds case MRT_PIM: 9431da177e4SLinus Torvalds { 9441da177e4SLinus Torvalds int v, ret; 9451da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9461da177e4SLinus Torvalds return -EFAULT; 9471da177e4SLinus Torvalds v = (v)?1:0; 9481da177e4SLinus Torvalds rtnl_lock(); 9491da177e4SLinus Torvalds ret = 0; 9501da177e4SLinus Torvalds if (v != mroute_do_pim) { 9511da177e4SLinus Torvalds mroute_do_pim = v; 9521da177e4SLinus Torvalds mroute_do_assert = v; 9531da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 9541da177e4SLinus Torvalds if (mroute_do_pim) 9551da177e4SLinus Torvalds ret = inet_add_protocol(&pim_protocol, 9561da177e4SLinus Torvalds IPPROTO_PIM); 9571da177e4SLinus Torvalds else 9581da177e4SLinus Torvalds ret = inet_del_protocol(&pim_protocol, 9591da177e4SLinus Torvalds IPPROTO_PIM); 9601da177e4SLinus Torvalds if (ret < 0) 9611da177e4SLinus Torvalds ret = -EAGAIN; 9621da177e4SLinus Torvalds #endif 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds rtnl_unlock(); 9651da177e4SLinus Torvalds return ret; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds #endif 9681da177e4SLinus Torvalds /* 9691da177e4SLinus Torvalds * Spurious command, or MRT_VERSION which you cannot 9701da177e4SLinus Torvalds * set. 9711da177e4SLinus Torvalds */ 9721da177e4SLinus Torvalds default: 9731da177e4SLinus Torvalds return -ENOPROTOOPT; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds /* 9781da177e4SLinus Torvalds * Getsock opt support for the multicast routing system. 9791da177e4SLinus Torvalds */ 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds int ip_mroute_getsockopt(struct sock *sk,int optname,char __user *optval,int __user *optlen) 9821da177e4SLinus Torvalds { 9831da177e4SLinus Torvalds int olr; 9841da177e4SLinus Torvalds int val; 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds if (optname!=MRT_VERSION && 9871da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 9881da177e4SLinus Torvalds optname!=MRT_PIM && 9891da177e4SLinus Torvalds #endif 9901da177e4SLinus Torvalds optname!=MRT_ASSERT) 9911da177e4SLinus Torvalds return -ENOPROTOOPT; 9921da177e4SLinus Torvalds 9931da177e4SLinus Torvalds if (get_user(olr, optlen)) 9941da177e4SLinus Torvalds return -EFAULT; 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds olr = min_t(unsigned int, olr, sizeof(int)); 9971da177e4SLinus Torvalds if (olr < 0) 9981da177e4SLinus Torvalds return -EINVAL; 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds if (put_user(olr,optlen)) 10011da177e4SLinus Torvalds return -EFAULT; 10021da177e4SLinus Torvalds if (optname==MRT_VERSION) 10031da177e4SLinus Torvalds val=0x0305; 10041da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10051da177e4SLinus Torvalds else if (optname==MRT_PIM) 10061da177e4SLinus Torvalds val=mroute_do_pim; 10071da177e4SLinus Torvalds #endif 10081da177e4SLinus Torvalds else 10091da177e4SLinus Torvalds val=mroute_do_assert; 10101da177e4SLinus Torvalds if (copy_to_user(optval,&val,olr)) 10111da177e4SLinus Torvalds return -EFAULT; 10121da177e4SLinus Torvalds return 0; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds /* 10161da177e4SLinus Torvalds * The IP multicast ioctl support routines. 10171da177e4SLinus Torvalds */ 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 10201da177e4SLinus Torvalds { 10211da177e4SLinus Torvalds struct sioc_sg_req sr; 10221da177e4SLinus Torvalds struct sioc_vif_req vr; 10231da177e4SLinus Torvalds struct vif_device *vif; 10241da177e4SLinus Torvalds struct mfc_cache *c; 10251da177e4SLinus Torvalds 1026132adf54SStephen Hemminger switch (cmd) { 10271da177e4SLinus Torvalds case SIOCGETVIFCNT: 10281da177e4SLinus Torvalds if (copy_from_user(&vr,arg,sizeof(vr))) 10291da177e4SLinus Torvalds return -EFAULT; 10301da177e4SLinus Torvalds if (vr.vifi>=maxvif) 10311da177e4SLinus Torvalds return -EINVAL; 10321da177e4SLinus Torvalds read_lock(&mrt_lock); 10331da177e4SLinus Torvalds vif=&vif_table[vr.vifi]; 10341da177e4SLinus Torvalds if (VIF_EXISTS(vr.vifi)) { 10351da177e4SLinus Torvalds vr.icount=vif->pkt_in; 10361da177e4SLinus Torvalds vr.ocount=vif->pkt_out; 10371da177e4SLinus Torvalds vr.ibytes=vif->bytes_in; 10381da177e4SLinus Torvalds vr.obytes=vif->bytes_out; 10391da177e4SLinus Torvalds read_unlock(&mrt_lock); 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds if (copy_to_user(arg,&vr,sizeof(vr))) 10421da177e4SLinus Torvalds return -EFAULT; 10431da177e4SLinus Torvalds return 0; 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds read_unlock(&mrt_lock); 10461da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10471da177e4SLinus Torvalds case SIOCGETSGCNT: 10481da177e4SLinus Torvalds if (copy_from_user(&sr,arg,sizeof(sr))) 10491da177e4SLinus Torvalds return -EFAULT; 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds read_lock(&mrt_lock); 10521da177e4SLinus Torvalds c = ipmr_cache_find(sr.src.s_addr, sr.grp.s_addr); 10531da177e4SLinus Torvalds if (c) { 10541da177e4SLinus Torvalds sr.pktcnt = c->mfc_un.res.pkt; 10551da177e4SLinus Torvalds sr.bytecnt = c->mfc_un.res.bytes; 10561da177e4SLinus Torvalds sr.wrong_if = c->mfc_un.res.wrong_if; 10571da177e4SLinus Torvalds read_unlock(&mrt_lock); 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds if (copy_to_user(arg,&sr,sizeof(sr))) 10601da177e4SLinus Torvalds return -EFAULT; 10611da177e4SLinus Torvalds return 0; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds read_unlock(&mrt_lock); 10641da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10651da177e4SLinus Torvalds default: 10661da177e4SLinus Torvalds return -ENOIOCTLCMD; 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds struct vif_device *v; 10741da177e4SLinus Torvalds int ct; 10751da177e4SLinus Torvalds if (event != NETDEV_UNREGISTER) 10761da177e4SLinus Torvalds return NOTIFY_DONE; 10771da177e4SLinus Torvalds v=&vif_table[0]; 10781da177e4SLinus Torvalds for (ct=0;ct<maxvif;ct++,v++) { 10791da177e4SLinus Torvalds if (v->dev==ptr) 10801da177e4SLinus Torvalds vif_delete(ct); 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds return NOTIFY_DONE; 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static struct notifier_block ip_mr_notifier={ 10871da177e4SLinus Torvalds .notifier_call = ipmr_device_event, 10881da177e4SLinus Torvalds }; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds /* 10911da177e4SLinus Torvalds * Encapsulate a packet by attaching a valid IPIP header to it. 10921da177e4SLinus Torvalds * This avoids tunnel drivers and other mess and gives us the speed so 10931da177e4SLinus Torvalds * important for multicast video. 10941da177e4SLinus Torvalds */ 10951da177e4SLinus Torvalds 1096114c7844SAl Viro static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr) 10971da177e4SLinus Torvalds { 10988856dfa3SArnaldo Carvalho de Melo struct iphdr *iph; 10998856dfa3SArnaldo Carvalho de Melo 11008856dfa3SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 11018856dfa3SArnaldo Carvalho de Melo skb->h.ipiph = skb->nh.iph; 11028856dfa3SArnaldo Carvalho de Melo skb_reset_network_header(skb); 11038856dfa3SArnaldo Carvalho de Melo iph = skb->nh.iph; 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds iph->version = 4; 11061da177e4SLinus Torvalds iph->tos = skb->nh.iph->tos; 11071da177e4SLinus Torvalds iph->ttl = skb->nh.iph->ttl; 11081da177e4SLinus Torvalds iph->frag_off = 0; 11091da177e4SLinus Torvalds iph->daddr = daddr; 11101da177e4SLinus Torvalds iph->saddr = saddr; 11111da177e4SLinus Torvalds iph->protocol = IPPROTO_IPIP; 11121da177e4SLinus Torvalds iph->ihl = 5; 11131da177e4SLinus Torvalds iph->tot_len = htons(skb->len); 11141da177e4SLinus Torvalds ip_select_ident(iph, skb->dst, NULL); 11151da177e4SLinus Torvalds ip_send_check(iph); 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 11181da177e4SLinus Torvalds nf_reset(skb); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds static inline int ipmr_forward_finish(struct sk_buff *skb) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds struct ip_options * opt = &(IPCB(skb)->opt); 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_OUTFORWDATAGRAMS); 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds if (unlikely(opt->optlen)) 11281da177e4SLinus Torvalds ip_forward_options(skb); 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds return dst_output(skb); 11311da177e4SLinus Torvalds } 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds /* 11341da177e4SLinus Torvalds * Processing handlers for ipmr_forward 11351da177e4SLinus Torvalds */ 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi) 11381da177e4SLinus Torvalds { 11391da177e4SLinus Torvalds struct iphdr *iph = skb->nh.iph; 11401da177e4SLinus Torvalds struct vif_device *vif = &vif_table[vifi]; 11411da177e4SLinus Torvalds struct net_device *dev; 11421da177e4SLinus Torvalds struct rtable *rt; 11431da177e4SLinus Torvalds int encap = 0; 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds if (vif->dev == NULL) 11461da177e4SLinus Torvalds goto out_free; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 11491da177e4SLinus Torvalds if (vif->flags & VIFF_REGISTER) { 11501da177e4SLinus Torvalds vif->pkt_out++; 11511da177e4SLinus Torvalds vif->bytes_out+=skb->len; 11522941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(vif->dev))->tx_bytes += skb->len; 11532941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(vif->dev))->tx_packets++; 11541da177e4SLinus Torvalds ipmr_cache_report(skb, vifi, IGMPMSG_WHOLEPKT); 11551da177e4SLinus Torvalds kfree_skb(skb); 11561da177e4SLinus Torvalds return; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds #endif 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds if (vif->flags&VIFF_TUNNEL) { 11611da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11621da177e4SLinus Torvalds .nl_u = { .ip4_u = 11631da177e4SLinus Torvalds { .daddr = vif->remote, 11641da177e4SLinus Torvalds .saddr = vif->local, 11651da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11661da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 11671da177e4SLinus Torvalds if (ip_route_output_key(&rt, &fl)) 11681da177e4SLinus Torvalds goto out_free; 11691da177e4SLinus Torvalds encap = sizeof(struct iphdr); 11701da177e4SLinus Torvalds } else { 11711da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11721da177e4SLinus Torvalds .nl_u = { .ip4_u = 11731da177e4SLinus Torvalds { .daddr = iph->daddr, 11741da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11751da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 11761da177e4SLinus Torvalds if (ip_route_output_key(&rt, &fl)) 11771da177e4SLinus Torvalds goto out_free; 11781da177e4SLinus Torvalds } 11791da177e4SLinus Torvalds 11801da177e4SLinus Torvalds dev = rt->u.dst.dev; 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) { 11831da177e4SLinus Torvalds /* Do not fragment multicasts. Alas, IPv4 does not 11841da177e4SLinus Torvalds allow to send ICMP, so that packets will disappear 11851da177e4SLinus Torvalds to blackhole. 11861da177e4SLinus Torvalds */ 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_FRAGFAILS); 11891da177e4SLinus Torvalds ip_rt_put(rt); 11901da177e4SLinus Torvalds goto out_free; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds encap += LL_RESERVED_SPACE(dev) + rt->u.dst.header_len; 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds if (skb_cow(skb, encap)) { 11961da177e4SLinus Torvalds ip_rt_put(rt); 11971da177e4SLinus Torvalds goto out_free; 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds vif->pkt_out++; 12011da177e4SLinus Torvalds vif->bytes_out+=skb->len; 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds dst_release(skb->dst); 12041da177e4SLinus Torvalds skb->dst = &rt->u.dst; 12051da177e4SLinus Torvalds iph = skb->nh.iph; 12061da177e4SLinus Torvalds ip_decrease_ttl(iph); 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds /* FIXME: forward and output firewalls used to be called here. 12091da177e4SLinus Torvalds * What do we do with netfilter? -- RR */ 12101da177e4SLinus Torvalds if (vif->flags & VIFF_TUNNEL) { 12111da177e4SLinus Torvalds ip_encap(skb, vif->local, vif->remote); 12121da177e4SLinus Torvalds /* FIXME: extra output firewall step used to be here. --RR */ 12132941a486SPatrick McHardy ((struct ip_tunnel *)netdev_priv(vif->dev))->stat.tx_packets++; 12142941a486SPatrick McHardy ((struct ip_tunnel *)netdev_priv(vif->dev))->stat.tx_bytes+=skb->len; 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds IPCB(skb)->flags |= IPSKB_FORWARDED; 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds /* 12201da177e4SLinus Torvalds * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally 12211da177e4SLinus Torvalds * not only before forwarding, but after forwarding on all output 12221da177e4SLinus Torvalds * interfaces. It is clear, if mrouter runs a multicasting 12231da177e4SLinus Torvalds * program, it should receive packets not depending to what interface 12241da177e4SLinus Torvalds * program is joined. 12251da177e4SLinus Torvalds * If we will not make it, the program will have to join on all 12261da177e4SLinus Torvalds * interfaces. On the other hand, multihoming host (or router, but 12271da177e4SLinus Torvalds * not mrouter) cannot join to more than one interface - it will 12281da177e4SLinus Torvalds * result in receiving multiple packets. 12291da177e4SLinus Torvalds */ 12301da177e4SLinus Torvalds NF_HOOK(PF_INET, NF_IP_FORWARD, skb, skb->dev, dev, 12311da177e4SLinus Torvalds ipmr_forward_finish); 12321da177e4SLinus Torvalds return; 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds out_free: 12351da177e4SLinus Torvalds kfree_skb(skb); 12361da177e4SLinus Torvalds return; 12371da177e4SLinus Torvalds } 12381da177e4SLinus Torvalds 12391da177e4SLinus Torvalds static int ipmr_find_vif(struct net_device *dev) 12401da177e4SLinus Torvalds { 12411da177e4SLinus Torvalds int ct; 12421da177e4SLinus Torvalds for (ct=maxvif-1; ct>=0; ct--) { 12431da177e4SLinus Torvalds if (vif_table[ct].dev == dev) 12441da177e4SLinus Torvalds break; 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds return ct; 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds /* "local" means that we should preserve one skb (for local delivery) */ 12501da177e4SLinus Torvalds 12511da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local) 12521da177e4SLinus Torvalds { 12531da177e4SLinus Torvalds int psend = -1; 12541da177e4SLinus Torvalds int vif, ct; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds vif = cache->mfc_parent; 12571da177e4SLinus Torvalds cache->mfc_un.res.pkt++; 12581da177e4SLinus Torvalds cache->mfc_un.res.bytes += skb->len; 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds /* 12611da177e4SLinus Torvalds * Wrong interface: drop packet and (maybe) send PIM assert. 12621da177e4SLinus Torvalds */ 12631da177e4SLinus Torvalds if (vif_table[vif].dev != skb->dev) { 12641da177e4SLinus Torvalds int true_vifi; 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds if (((struct rtable*)skb->dst)->fl.iif == 0) { 12671da177e4SLinus Torvalds /* It is our own packet, looped back. 12681da177e4SLinus Torvalds Very complicated situation... 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds The best workaround until routing daemons will be 12711da177e4SLinus Torvalds fixed is not to redistribute packet, if it was 12721da177e4SLinus Torvalds send through wrong interface. It means, that 12731da177e4SLinus Torvalds multicast applications WILL NOT work for 12741da177e4SLinus Torvalds (S,G), which have default multicast route pointing 12751da177e4SLinus Torvalds to wrong oif. In any case, it is not a good 12761da177e4SLinus Torvalds idea to use multicasting applications on router. 12771da177e4SLinus Torvalds */ 12781da177e4SLinus Torvalds goto dont_forward; 12791da177e4SLinus Torvalds } 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds cache->mfc_un.res.wrong_if++; 12821da177e4SLinus Torvalds true_vifi = ipmr_find_vif(skb->dev); 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds if (true_vifi >= 0 && mroute_do_assert && 12851da177e4SLinus Torvalds /* pimsm uses asserts, when switching from RPT to SPT, 12861da177e4SLinus Torvalds so that we cannot check that packet arrived on an oif. 12871da177e4SLinus Torvalds It is bad, but otherwise we would need to move pretty 12881da177e4SLinus Torvalds large chunk of pimd to kernel. Ough... --ANK 12891da177e4SLinus Torvalds */ 12901da177e4SLinus Torvalds (mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) && 12911da177e4SLinus Torvalds time_after(jiffies, 12921da177e4SLinus Torvalds cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { 12931da177e4SLinus Torvalds cache->mfc_un.res.last_assert = jiffies; 12941da177e4SLinus Torvalds ipmr_cache_report(skb, true_vifi, IGMPMSG_WRONGVIF); 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds goto dont_forward; 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds vif_table[vif].pkt_in++; 13001da177e4SLinus Torvalds vif_table[vif].bytes_in+=skb->len; 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds /* 13031da177e4SLinus Torvalds * Forward the frame 13041da177e4SLinus Torvalds */ 13051da177e4SLinus Torvalds for (ct = cache->mfc_un.res.maxvif-1; ct >= cache->mfc_un.res.minvif; ct--) { 13061da177e4SLinus Torvalds if (skb->nh.iph->ttl > cache->mfc_un.res.ttls[ct]) { 13071da177e4SLinus Torvalds if (psend != -1) { 13081da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13091da177e4SLinus Torvalds if (skb2) 13101da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds psend=ct; 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds if (psend != -1) { 13161da177e4SLinus Torvalds if (local) { 13171da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13181da177e4SLinus Torvalds if (skb2) 13191da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13201da177e4SLinus Torvalds } else { 13211da177e4SLinus Torvalds ipmr_queue_xmit(skb, cache, psend); 13221da177e4SLinus Torvalds return 0; 13231da177e4SLinus Torvalds } 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds dont_forward: 13271da177e4SLinus Torvalds if (!local) 13281da177e4SLinus Torvalds kfree_skb(skb); 13291da177e4SLinus Torvalds return 0; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds /* 13341da177e4SLinus Torvalds * Multicast packets for forwarding arrive here 13351da177e4SLinus Torvalds */ 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds int ip_mr_input(struct sk_buff *skb) 13381da177e4SLinus Torvalds { 13391da177e4SLinus Torvalds struct mfc_cache *cache; 13401da177e4SLinus Torvalds int local = ((struct rtable*)skb->dst)->rt_flags&RTCF_LOCAL; 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds /* Packet is looped back after forward, it should not be 13431da177e4SLinus Torvalds forwarded second time, but still can be delivered locally. 13441da177e4SLinus Torvalds */ 13451da177e4SLinus Torvalds if (IPCB(skb)->flags&IPSKB_FORWARDED) 13461da177e4SLinus Torvalds goto dont_forward; 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds if (!local) { 13491da177e4SLinus Torvalds if (IPCB(skb)->opt.router_alert) { 13501da177e4SLinus Torvalds if (ip_call_ra_chain(skb)) 13511da177e4SLinus Torvalds return 0; 13521da177e4SLinus Torvalds } else if (skb->nh.iph->protocol == IPPROTO_IGMP){ 13531da177e4SLinus Torvalds /* IGMPv1 (and broken IGMPv2 implementations sort of 13541da177e4SLinus Torvalds Cisco IOS <= 11.2(8)) do not put router alert 13551da177e4SLinus Torvalds option to IGMP packets destined to routable 13561da177e4SLinus Torvalds groups. It is very bad, because it means 13571da177e4SLinus Torvalds that we can forward NO IGMP messages. 13581da177e4SLinus Torvalds */ 13591da177e4SLinus Torvalds read_lock(&mrt_lock); 13601da177e4SLinus Torvalds if (mroute_socket) { 13612715bcf9SPatrick McHardy nf_reset(skb); 13621da177e4SLinus Torvalds raw_rcv(mroute_socket, skb); 13631da177e4SLinus Torvalds read_unlock(&mrt_lock); 13641da177e4SLinus Torvalds return 0; 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds read_unlock(&mrt_lock); 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds 13701da177e4SLinus Torvalds read_lock(&mrt_lock); 13711da177e4SLinus Torvalds cache = ipmr_cache_find(skb->nh.iph->saddr, skb->nh.iph->daddr); 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds /* 13741da177e4SLinus Torvalds * No usable cache entry 13751da177e4SLinus Torvalds */ 13761da177e4SLinus Torvalds if (cache==NULL) { 13771da177e4SLinus Torvalds int vif; 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds if (local) { 13801da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13811da177e4SLinus Torvalds ip_local_deliver(skb); 13821da177e4SLinus Torvalds if (skb2 == NULL) { 13831da177e4SLinus Torvalds read_unlock(&mrt_lock); 13841da177e4SLinus Torvalds return -ENOBUFS; 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds skb = skb2; 13871da177e4SLinus Torvalds } 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds vif = ipmr_find_vif(skb->dev); 13901da177e4SLinus Torvalds if (vif >= 0) { 13911da177e4SLinus Torvalds int err = ipmr_cache_unresolved(vif, skb); 13921da177e4SLinus Torvalds read_unlock(&mrt_lock); 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds return err; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds read_unlock(&mrt_lock); 13971da177e4SLinus Torvalds kfree_skb(skb); 13981da177e4SLinus Torvalds return -ENODEV; 13991da177e4SLinus Torvalds } 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds ip_mr_forward(skb, cache, local); 14021da177e4SLinus Torvalds 14031da177e4SLinus Torvalds read_unlock(&mrt_lock); 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds if (local) 14061da177e4SLinus Torvalds return ip_local_deliver(skb); 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds return 0; 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds dont_forward: 14111da177e4SLinus Torvalds if (local) 14121da177e4SLinus Torvalds return ip_local_deliver(skb); 14131da177e4SLinus Torvalds kfree_skb(skb); 14141da177e4SLinus Torvalds return 0; 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V1 14181da177e4SLinus Torvalds /* 14191da177e4SLinus Torvalds * Handle IGMP messages of PIMv1 14201da177e4SLinus Torvalds */ 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds int pim_rcv_v1(struct sk_buff * skb) 14231da177e4SLinus Torvalds { 14241da177e4SLinus Torvalds struct igmphdr *pim; 14251da177e4SLinus Torvalds struct iphdr *encap; 14261da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 14291da177e4SLinus Torvalds goto drop; 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds pim = (struct igmphdr*)skb->h.raw; 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds if (!mroute_do_pim || 14341da177e4SLinus Torvalds skb->len < sizeof(*pim) + sizeof(*encap) || 14351da177e4SLinus Torvalds pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) 14361da177e4SLinus Torvalds goto drop; 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds encap = (struct iphdr*)(skb->h.raw + sizeof(struct igmphdr)); 14391da177e4SLinus Torvalds /* 14401da177e4SLinus Torvalds Check that: 14411da177e4SLinus Torvalds a. packet is really destinted to a multicast group 14421da177e4SLinus Torvalds b. packet is not a NULL-REGISTER 14431da177e4SLinus Torvalds c. packet is not truncated 14441da177e4SLinus Torvalds */ 14451da177e4SLinus Torvalds if (!MULTICAST(encap->daddr) || 14461da177e4SLinus Torvalds encap->tot_len == 0 || 14471da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 14481da177e4SLinus Torvalds goto drop; 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds read_lock(&mrt_lock); 14511da177e4SLinus Torvalds if (reg_vif_num >= 0) 14521da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 14531da177e4SLinus Torvalds if (reg_dev) 14541da177e4SLinus Torvalds dev_hold(reg_dev); 14551da177e4SLinus Torvalds read_unlock(&mrt_lock); 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds if (reg_dev == NULL) 14581da177e4SLinus Torvalds goto drop; 14591da177e4SLinus Torvalds 14601da177e4SLinus Torvalds skb->mac.raw = skb->nh.raw; 14611da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 146231c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 14631da177e4SLinus Torvalds skb->dev = reg_dev; 14641da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 14651da177e4SLinus Torvalds skb->ip_summed = 0; 14661da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 14671da177e4SLinus Torvalds dst_release(skb->dst); 14681da177e4SLinus Torvalds skb->dst = NULL; 14692941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_bytes += skb->len; 14702941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_packets++; 14711da177e4SLinus Torvalds nf_reset(skb); 14721da177e4SLinus Torvalds netif_rx(skb); 14731da177e4SLinus Torvalds dev_put(reg_dev); 14741da177e4SLinus Torvalds return 0; 14751da177e4SLinus Torvalds drop: 14761da177e4SLinus Torvalds kfree_skb(skb); 14771da177e4SLinus Torvalds return 0; 14781da177e4SLinus Torvalds } 14791da177e4SLinus Torvalds #endif 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 14821da177e4SLinus Torvalds static int pim_rcv(struct sk_buff * skb) 14831da177e4SLinus Torvalds { 14841da177e4SLinus Torvalds struct pimreghdr *pim; 14851da177e4SLinus Torvalds struct iphdr *encap; 14861da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 14871da177e4SLinus Torvalds 14881da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 14891da177e4SLinus Torvalds goto drop; 14901da177e4SLinus Torvalds 14911da177e4SLinus Torvalds pim = (struct pimreghdr*)skb->h.raw; 14921da177e4SLinus Torvalds if (pim->type != ((PIM_VERSION<<4)|(PIM_REGISTER)) || 14931da177e4SLinus Torvalds (pim->flags&PIM_NULL_REGISTER) || 14941da177e4SLinus Torvalds (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && 1495d3bc23e7SAl Viro csum_fold(skb_checksum(skb, 0, skb->len, 0)))) 14961da177e4SLinus Torvalds goto drop; 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds /* check if the inner packet is destined to mcast group */ 14991da177e4SLinus Torvalds encap = (struct iphdr*)(skb->h.raw + sizeof(struct pimreghdr)); 15001da177e4SLinus Torvalds if (!MULTICAST(encap->daddr) || 15011da177e4SLinus Torvalds encap->tot_len == 0 || 15021da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 15031da177e4SLinus Torvalds goto drop; 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds read_lock(&mrt_lock); 15061da177e4SLinus Torvalds if (reg_vif_num >= 0) 15071da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 15081da177e4SLinus Torvalds if (reg_dev) 15091da177e4SLinus Torvalds dev_hold(reg_dev); 15101da177e4SLinus Torvalds read_unlock(&mrt_lock); 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds if (reg_dev == NULL) 15131da177e4SLinus Torvalds goto drop; 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds skb->mac.raw = skb->nh.raw; 15161da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 151731c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 15181da177e4SLinus Torvalds skb->dev = reg_dev; 15191da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 15201da177e4SLinus Torvalds skb->ip_summed = 0; 15211da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 15221da177e4SLinus Torvalds dst_release(skb->dst); 15232941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_bytes += skb->len; 15242941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_packets++; 15251da177e4SLinus Torvalds skb->dst = NULL; 15261da177e4SLinus Torvalds nf_reset(skb); 15271da177e4SLinus Torvalds netif_rx(skb); 15281da177e4SLinus Torvalds dev_put(reg_dev); 15291da177e4SLinus Torvalds return 0; 15301da177e4SLinus Torvalds drop: 15311da177e4SLinus Torvalds kfree_skb(skb); 15321da177e4SLinus Torvalds return 0; 15331da177e4SLinus Torvalds } 15341da177e4SLinus Torvalds #endif 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds static int 15371da177e4SLinus Torvalds ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm) 15381da177e4SLinus Torvalds { 15391da177e4SLinus Torvalds int ct; 15401da177e4SLinus Torvalds struct rtnexthop *nhp; 15411da177e4SLinus Torvalds struct net_device *dev = vif_table[c->mfc_parent].dev; 15421da177e4SLinus Torvalds u8 *b = skb->tail; 15431da177e4SLinus Torvalds struct rtattr *mp_head; 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds if (dev) 15461da177e4SLinus Torvalds RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex); 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds mp_head = (struct rtattr*)skb_put(skb, RTA_LENGTH(0)); 15491da177e4SLinus Torvalds 15501da177e4SLinus Torvalds for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { 15511da177e4SLinus Torvalds if (c->mfc_un.res.ttls[ct] < 255) { 15521da177e4SLinus Torvalds if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4)) 15531da177e4SLinus Torvalds goto rtattr_failure; 15541da177e4SLinus Torvalds nhp = (struct rtnexthop*)skb_put(skb, RTA_ALIGN(sizeof(*nhp))); 15551da177e4SLinus Torvalds nhp->rtnh_flags = 0; 15561da177e4SLinus Torvalds nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; 15571da177e4SLinus Torvalds nhp->rtnh_ifindex = vif_table[ct].dev->ifindex; 15581da177e4SLinus Torvalds nhp->rtnh_len = sizeof(*nhp); 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds mp_head->rta_type = RTA_MULTIPATH; 15621da177e4SLinus Torvalds mp_head->rta_len = skb->tail - (u8*)mp_head; 15631da177e4SLinus Torvalds rtm->rtm_type = RTN_MULTICAST; 15641da177e4SLinus Torvalds return 1; 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds rtattr_failure: 15671da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 15681da177e4SLinus Torvalds return -EMSGSIZE; 15691da177e4SLinus Torvalds } 15701da177e4SLinus Torvalds 15711da177e4SLinus Torvalds int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait) 15721da177e4SLinus Torvalds { 15731da177e4SLinus Torvalds int err; 15741da177e4SLinus Torvalds struct mfc_cache *cache; 15751da177e4SLinus Torvalds struct rtable *rt = (struct rtable*)skb->dst; 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds read_lock(&mrt_lock); 15781da177e4SLinus Torvalds cache = ipmr_cache_find(rt->rt_src, rt->rt_dst); 15791da177e4SLinus Torvalds 15801da177e4SLinus Torvalds if (cache==NULL) { 158172287490SAlexey Kuznetsov struct sk_buff *skb2; 15821da177e4SLinus Torvalds struct net_device *dev; 15831da177e4SLinus Torvalds int vif; 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds if (nowait) { 15861da177e4SLinus Torvalds read_unlock(&mrt_lock); 15871da177e4SLinus Torvalds return -EAGAIN; 15881da177e4SLinus Torvalds } 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds dev = skb->dev; 15911da177e4SLinus Torvalds if (dev == NULL || (vif = ipmr_find_vif(dev)) < 0) { 15921da177e4SLinus Torvalds read_unlock(&mrt_lock); 15931da177e4SLinus Torvalds return -ENODEV; 15941da177e4SLinus Torvalds } 159572287490SAlexey Kuznetsov skb2 = skb_clone(skb, GFP_ATOMIC); 159672287490SAlexey Kuznetsov if (!skb2) { 159772287490SAlexey Kuznetsov read_unlock(&mrt_lock); 159872287490SAlexey Kuznetsov return -ENOMEM; 159972287490SAlexey Kuznetsov } 160072287490SAlexey Kuznetsov 1601e2d1bca7SArnaldo Carvalho de Melo skb_push(skb2, sizeof(struct iphdr)); 1602e2d1bca7SArnaldo Carvalho de Melo skb_reset_network_header(skb2); 160372287490SAlexey Kuznetsov skb2->nh.iph->ihl = sizeof(struct iphdr)>>2; 160472287490SAlexey Kuznetsov skb2->nh.iph->saddr = rt->rt_src; 160572287490SAlexey Kuznetsov skb2->nh.iph->daddr = rt->rt_dst; 160672287490SAlexey Kuznetsov skb2->nh.iph->version = 0; 160772287490SAlexey Kuznetsov err = ipmr_cache_unresolved(vif, skb2); 16081da177e4SLinus Torvalds read_unlock(&mrt_lock); 16091da177e4SLinus Torvalds return err; 16101da177e4SLinus Torvalds } 16111da177e4SLinus Torvalds 16121da177e4SLinus Torvalds if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) 16131da177e4SLinus Torvalds cache->mfc_flags |= MFC_NOTIFY; 16141da177e4SLinus Torvalds err = ipmr_fill_mroute(skb, cache, rtm); 16151da177e4SLinus Torvalds read_unlock(&mrt_lock); 16161da177e4SLinus Torvalds return err; 16171da177e4SLinus Torvalds } 16181da177e4SLinus Torvalds 16191da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 16201da177e4SLinus Torvalds /* 16211da177e4SLinus Torvalds * The /proc interfaces to multicast routing /proc/ip_mr_cache /proc/ip_mr_vif 16221da177e4SLinus Torvalds */ 16231da177e4SLinus Torvalds struct ipmr_vif_iter { 16241da177e4SLinus Torvalds int ct; 16251da177e4SLinus Torvalds }; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter, 16281da177e4SLinus Torvalds loff_t pos) 16291da177e4SLinus Torvalds { 16301da177e4SLinus Torvalds for (iter->ct = 0; iter->ct < maxvif; ++iter->ct) { 16311da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16321da177e4SLinus Torvalds continue; 16331da177e4SLinus Torvalds if (pos-- == 0) 16341da177e4SLinus Torvalds return &vif_table[iter->ct]; 16351da177e4SLinus Torvalds } 16361da177e4SLinus Torvalds return NULL; 16371da177e4SLinus Torvalds } 16381da177e4SLinus Torvalds 16391da177e4SLinus Torvalds static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) 16401da177e4SLinus Torvalds { 16411da177e4SLinus Torvalds read_lock(&mrt_lock); 16421da177e4SLinus Torvalds return *pos ? ipmr_vif_seq_idx(seq->private, *pos - 1) 16431da177e4SLinus Torvalds : SEQ_START_TOKEN; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) 16471da177e4SLinus Torvalds { 16481da177e4SLinus Torvalds struct ipmr_vif_iter *iter = seq->private; 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds ++*pos; 16511da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 16521da177e4SLinus Torvalds return ipmr_vif_seq_idx(iter, 0); 16531da177e4SLinus Torvalds 16541da177e4SLinus Torvalds while (++iter->ct < maxvif) { 16551da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16561da177e4SLinus Torvalds continue; 16571da177e4SLinus Torvalds return &vif_table[iter->ct]; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds return NULL; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds 16621da177e4SLinus Torvalds static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds read_unlock(&mrt_lock); 16651da177e4SLinus Torvalds } 16661da177e4SLinus Torvalds 16671da177e4SLinus Torvalds static int ipmr_vif_seq_show(struct seq_file *seq, void *v) 16681da177e4SLinus Torvalds { 16691da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 16701da177e4SLinus Torvalds seq_puts(seq, 16711da177e4SLinus Torvalds "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); 16721da177e4SLinus Torvalds } else { 16731da177e4SLinus Torvalds const struct vif_device *vif = v; 16741da177e4SLinus Torvalds const char *name = vif->dev ? vif->dev->name : "none"; 16751da177e4SLinus Torvalds 16761da177e4SLinus Torvalds seq_printf(seq, 16771da177e4SLinus Torvalds "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", 16781da177e4SLinus Torvalds vif - vif_table, 16791da177e4SLinus Torvalds name, vif->bytes_in, vif->pkt_in, 16801da177e4SLinus Torvalds vif->bytes_out, vif->pkt_out, 16811da177e4SLinus Torvalds vif->flags, vif->local, vif->remote); 16821da177e4SLinus Torvalds } 16831da177e4SLinus Torvalds return 0; 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds 16861da177e4SLinus Torvalds static struct seq_operations ipmr_vif_seq_ops = { 16871da177e4SLinus Torvalds .start = ipmr_vif_seq_start, 16881da177e4SLinus Torvalds .next = ipmr_vif_seq_next, 16891da177e4SLinus Torvalds .stop = ipmr_vif_seq_stop, 16901da177e4SLinus Torvalds .show = ipmr_vif_seq_show, 16911da177e4SLinus Torvalds }; 16921da177e4SLinus Torvalds 16931da177e4SLinus Torvalds static int ipmr_vif_open(struct inode *inode, struct file *file) 16941da177e4SLinus Torvalds { 16951da177e4SLinus Torvalds struct seq_file *seq; 16961da177e4SLinus Torvalds int rc = -ENOMEM; 16971da177e4SLinus Torvalds struct ipmr_vif_iter *s = kmalloc(sizeof(*s), GFP_KERNEL); 16981da177e4SLinus Torvalds 16991da177e4SLinus Torvalds if (!s) 17001da177e4SLinus Torvalds goto out; 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds rc = seq_open(file, &ipmr_vif_seq_ops); 17031da177e4SLinus Torvalds if (rc) 17041da177e4SLinus Torvalds goto out_kfree; 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds s->ct = 0; 17071da177e4SLinus Torvalds seq = file->private_data; 17081da177e4SLinus Torvalds seq->private = s; 17091da177e4SLinus Torvalds out: 17101da177e4SLinus Torvalds return rc; 17111da177e4SLinus Torvalds out_kfree: 17121da177e4SLinus Torvalds kfree(s); 17131da177e4SLinus Torvalds goto out; 17141da177e4SLinus Torvalds 17151da177e4SLinus Torvalds } 17161da177e4SLinus Torvalds 17179a32144eSArjan van de Ven static const struct file_operations ipmr_vif_fops = { 17181da177e4SLinus Torvalds .owner = THIS_MODULE, 17191da177e4SLinus Torvalds .open = ipmr_vif_open, 17201da177e4SLinus Torvalds .read = seq_read, 17211da177e4SLinus Torvalds .llseek = seq_lseek, 17221da177e4SLinus Torvalds .release = seq_release_private, 17231da177e4SLinus Torvalds }; 17241da177e4SLinus Torvalds 17251da177e4SLinus Torvalds struct ipmr_mfc_iter { 17261da177e4SLinus Torvalds struct mfc_cache **cache; 17271da177e4SLinus Torvalds int ct; 17281da177e4SLinus Torvalds }; 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos) 17321da177e4SLinus Torvalds { 17331da177e4SLinus Torvalds struct mfc_cache *mfc; 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds it->cache = mfc_cache_array; 17361da177e4SLinus Torvalds read_lock(&mrt_lock); 17371da177e4SLinus Torvalds for (it->ct = 0; it->ct < MFC_LINES; it->ct++) 17381da177e4SLinus Torvalds for (mfc = mfc_cache_array[it->ct]; mfc; mfc = mfc->next) 17391da177e4SLinus Torvalds if (pos-- == 0) 17401da177e4SLinus Torvalds return mfc; 17411da177e4SLinus Torvalds read_unlock(&mrt_lock); 17421da177e4SLinus Torvalds 17431da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17441da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17451da177e4SLinus Torvalds for (mfc = mfc_unres_queue; mfc; mfc = mfc->next) 17461da177e4SLinus Torvalds if (pos-- == 0) 17471da177e4SLinus Torvalds return mfc; 17481da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 17491da177e4SLinus Torvalds 17501da177e4SLinus Torvalds it->cache = NULL; 17511da177e4SLinus Torvalds return NULL; 17521da177e4SLinus Torvalds } 17531da177e4SLinus Torvalds 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) 17561da177e4SLinus Torvalds { 17571da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17581da177e4SLinus Torvalds it->cache = NULL; 17591da177e4SLinus Torvalds it->ct = 0; 17601da177e4SLinus Torvalds return *pos ? ipmr_mfc_seq_idx(seq->private, *pos - 1) 17611da177e4SLinus Torvalds : SEQ_START_TOKEN; 17621da177e4SLinus Torvalds } 17631da177e4SLinus Torvalds 17641da177e4SLinus Torvalds static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) 17651da177e4SLinus Torvalds { 17661da177e4SLinus Torvalds struct mfc_cache *mfc = v; 17671da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17681da177e4SLinus Torvalds 17691da177e4SLinus Torvalds ++*pos; 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 17721da177e4SLinus Torvalds return ipmr_mfc_seq_idx(seq->private, 0); 17731da177e4SLinus Torvalds 17741da177e4SLinus Torvalds if (mfc->next) 17751da177e4SLinus Torvalds return mfc->next; 17761da177e4SLinus Torvalds 17771da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 17781da177e4SLinus Torvalds goto end_of_list; 17791da177e4SLinus Torvalds 17801da177e4SLinus Torvalds BUG_ON(it->cache != mfc_cache_array); 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds while (++it->ct < MFC_LINES) { 17831da177e4SLinus Torvalds mfc = mfc_cache_array[it->ct]; 17841da177e4SLinus Torvalds if (mfc) 17851da177e4SLinus Torvalds return mfc; 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds /* exhausted cache_array, show unresolved */ 17891da177e4SLinus Torvalds read_unlock(&mrt_lock); 17901da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17911da177e4SLinus Torvalds it->ct = 0; 17921da177e4SLinus Torvalds 17931da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17941da177e4SLinus Torvalds mfc = mfc_unres_queue; 17951da177e4SLinus Torvalds if (mfc) 17961da177e4SLinus Torvalds return mfc; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds end_of_list: 17991da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18001da177e4SLinus Torvalds it->cache = NULL; 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds return NULL; 18031da177e4SLinus Torvalds } 18041da177e4SLinus Torvalds 18051da177e4SLinus Torvalds static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) 18061da177e4SLinus Torvalds { 18071da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 18101da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18111da177e4SLinus Torvalds else if (it->cache == mfc_cache_array) 18121da177e4SLinus Torvalds read_unlock(&mrt_lock); 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds 18151da177e4SLinus Torvalds static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) 18161da177e4SLinus Torvalds { 18171da177e4SLinus Torvalds int n; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 18201da177e4SLinus Torvalds seq_puts(seq, 18211da177e4SLinus Torvalds "Group Origin Iif Pkts Bytes Wrong Oifs\n"); 18221da177e4SLinus Torvalds } else { 18231da177e4SLinus Torvalds const struct mfc_cache *mfc = v; 18241da177e4SLinus Torvalds const struct ipmr_mfc_iter *it = seq->private; 18251da177e4SLinus Torvalds 18261da177e4SLinus Torvalds seq_printf(seq, "%08lX %08lX %-3d %8ld %8ld %8ld", 18271da177e4SLinus Torvalds (unsigned long) mfc->mfc_mcastgrp, 18281da177e4SLinus Torvalds (unsigned long) mfc->mfc_origin, 18291da177e4SLinus Torvalds mfc->mfc_parent, 18301da177e4SLinus Torvalds mfc->mfc_un.res.pkt, 18311da177e4SLinus Torvalds mfc->mfc_un.res.bytes, 18321da177e4SLinus Torvalds mfc->mfc_un.res.wrong_if); 18331da177e4SLinus Torvalds 18341da177e4SLinus Torvalds if (it->cache != &mfc_unres_queue) { 18351da177e4SLinus Torvalds for (n = mfc->mfc_un.res.minvif; 18361da177e4SLinus Torvalds n < mfc->mfc_un.res.maxvif; n++ ) { 18371da177e4SLinus Torvalds if (VIF_EXISTS(n) 18381da177e4SLinus Torvalds && mfc->mfc_un.res.ttls[n] < 255) 18391da177e4SLinus Torvalds seq_printf(seq, 18401da177e4SLinus Torvalds " %2d:%-3d", 18411da177e4SLinus Torvalds n, mfc->mfc_un.res.ttls[n]); 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds } 18441da177e4SLinus Torvalds seq_putc(seq, '\n'); 18451da177e4SLinus Torvalds } 18461da177e4SLinus Torvalds return 0; 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds static struct seq_operations ipmr_mfc_seq_ops = { 18501da177e4SLinus Torvalds .start = ipmr_mfc_seq_start, 18511da177e4SLinus Torvalds .next = ipmr_mfc_seq_next, 18521da177e4SLinus Torvalds .stop = ipmr_mfc_seq_stop, 18531da177e4SLinus Torvalds .show = ipmr_mfc_seq_show, 18541da177e4SLinus Torvalds }; 18551da177e4SLinus Torvalds 18561da177e4SLinus Torvalds static int ipmr_mfc_open(struct inode *inode, struct file *file) 18571da177e4SLinus Torvalds { 18581da177e4SLinus Torvalds struct seq_file *seq; 18591da177e4SLinus Torvalds int rc = -ENOMEM; 18601da177e4SLinus Torvalds struct ipmr_mfc_iter *s = kmalloc(sizeof(*s), GFP_KERNEL); 18611da177e4SLinus Torvalds 18621da177e4SLinus Torvalds if (!s) 18631da177e4SLinus Torvalds goto out; 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds rc = seq_open(file, &ipmr_mfc_seq_ops); 18661da177e4SLinus Torvalds if (rc) 18671da177e4SLinus Torvalds goto out_kfree; 18681da177e4SLinus Torvalds 18691da177e4SLinus Torvalds seq = file->private_data; 18701da177e4SLinus Torvalds seq->private = s; 18711da177e4SLinus Torvalds out: 18721da177e4SLinus Torvalds return rc; 18731da177e4SLinus Torvalds out_kfree: 18741da177e4SLinus Torvalds kfree(s); 18751da177e4SLinus Torvalds goto out; 18761da177e4SLinus Torvalds 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds 18799a32144eSArjan van de Ven static const struct file_operations ipmr_mfc_fops = { 18801da177e4SLinus Torvalds .owner = THIS_MODULE, 18811da177e4SLinus Torvalds .open = ipmr_mfc_open, 18821da177e4SLinus Torvalds .read = seq_read, 18831da177e4SLinus Torvalds .llseek = seq_lseek, 18841da177e4SLinus Torvalds .release = seq_release_private, 18851da177e4SLinus Torvalds }; 18861da177e4SLinus Torvalds #endif 18871da177e4SLinus Torvalds 18881da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 18891da177e4SLinus Torvalds static struct net_protocol pim_protocol = { 18901da177e4SLinus Torvalds .handler = pim_rcv, 18911da177e4SLinus Torvalds }; 18921da177e4SLinus Torvalds #endif 18931da177e4SLinus Torvalds 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds /* 18961da177e4SLinus Torvalds * Setup for IP multicast routing 18971da177e4SLinus Torvalds */ 18981da177e4SLinus Torvalds 18991da177e4SLinus Torvalds void __init ip_mr_init(void) 19001da177e4SLinus Torvalds { 19011da177e4SLinus Torvalds mrt_cachep = kmem_cache_create("ip_mrt_cache", 19021da177e4SLinus Torvalds sizeof(struct mfc_cache), 1903e5d679f3SAlexey Dobriyan 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, 19041da177e4SLinus Torvalds NULL, NULL); 19051da177e4SLinus Torvalds init_timer(&ipmr_expire_timer); 19061da177e4SLinus Torvalds ipmr_expire_timer.function=ipmr_expire_process; 19071da177e4SLinus Torvalds register_netdevice_notifier(&ip_mr_notifier); 19081da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 19091da177e4SLinus Torvalds proc_net_fops_create("ip_mr_vif", 0, &ipmr_vif_fops); 19101da177e4SLinus Torvalds proc_net_fops_create("ip_mr_cache", 0, &ipmr_mfc_fops); 19111da177e4SLinus Torvalds #endif 19121da177e4SLinus Torvalds } 1913