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> 52457c4cbcSEric W. Biederman #include <net/net_namespace.h> 531da177e4SLinus Torvalds #include <net/ip.h> 541da177e4SLinus Torvalds #include <net/protocol.h> 551da177e4SLinus Torvalds #include <linux/skbuff.h> 5614c85021SArnaldo Carvalho de Melo #include <net/route.h> 571da177e4SLinus Torvalds #include <net/sock.h> 581da177e4SLinus Torvalds #include <net/icmp.h> 591da177e4SLinus Torvalds #include <net/udp.h> 601da177e4SLinus Torvalds #include <net/raw.h> 611da177e4SLinus Torvalds #include <linux/notifier.h> 621da177e4SLinus Torvalds #include <linux/if_arp.h> 631da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 641da177e4SLinus Torvalds #include <net/ipip.h> 651da177e4SLinus Torvalds #include <net/checksum.h> 66dc5fc579SArnaldo Carvalho de Melo #include <net/netlink.h> 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) 691da177e4SLinus Torvalds #define CONFIG_IP_PIMSM 1 701da177e4SLinus Torvalds #endif 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds static struct sock *mroute_socket; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* Big lock, protecting vif table, mrt cache and mroute socket state. 761da177e4SLinus Torvalds Note that the changes are semaphored via rtnl_lock. 771da177e4SLinus Torvalds */ 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds static DEFINE_RWLOCK(mrt_lock); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* 821da177e4SLinus Torvalds * Multicast router control variables 831da177e4SLinus Torvalds */ 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds static struct vif_device vif_table[MAXVIFS]; /* Devices */ 861da177e4SLinus Torvalds static int maxvif; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds #define VIF_EXISTS(idx) (vif_table[idx].dev != NULL) 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds static int mroute_do_assert; /* Set in PIM assert */ 911da177e4SLinus Torvalds static int mroute_do_pim; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds static struct mfc_cache *mfc_cache_array[MFC_LINES]; /* Forwarding cache */ 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds static struct mfc_cache *mfc_unres_queue; /* Queue of unresolved entries */ 961da177e4SLinus Torvalds static atomic_t cache_resolve_queue_len; /* Size of unresolved */ 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* Special spinlock for queue of unresolved entries */ 991da177e4SLinus Torvalds static DEFINE_SPINLOCK(mfc_unres_lock); 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds /* We return to original Alan's scheme. Hash table of resolved 1021da177e4SLinus Torvalds entries is changed only in process context and protected 1031da177e4SLinus Torvalds with weak lock mrt_lock. Queue of unresolved entries is protected 1041da177e4SLinus Torvalds with strong spinlock mfc_unres_lock. 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds In this case data path is free of exclusive locks at all. 1071da177e4SLinus Torvalds */ 1081da177e4SLinus Torvalds 109e18b890bSChristoph Lameter static struct kmem_cache *mrt_cachep __read_mostly; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local); 1121da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert); 1131da177e4SLinus Torvalds static int ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm); 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 1161da177e4SLinus Torvalds static struct net_protocol pim_protocol; 1171da177e4SLinus Torvalds #endif 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds static struct timer_list ipmr_expire_timer; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static 1241da177e4SLinus Torvalds struct net_device *ipmr_new_tunnel(struct vifctl *v) 1251da177e4SLinus Torvalds { 1261da177e4SLinus Torvalds struct net_device *dev; 1271da177e4SLinus Torvalds 128881d966bSEric W. Biederman dev = __dev_get_by_name(&init_net, "tunl0"); 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds if (dev) { 1311da177e4SLinus Torvalds int err; 1321da177e4SLinus Torvalds struct ifreq ifr; 1331da177e4SLinus Torvalds mm_segment_t oldfs; 1341da177e4SLinus Torvalds struct ip_tunnel_parm p; 1351da177e4SLinus Torvalds struct in_device *in_dev; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 1381da177e4SLinus Torvalds p.iph.daddr = v->vifc_rmt_addr.s_addr; 1391da177e4SLinus Torvalds p.iph.saddr = v->vifc_lcl_addr.s_addr; 1401da177e4SLinus Torvalds p.iph.version = 4; 1411da177e4SLinus Torvalds p.iph.ihl = 5; 1421da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPIP; 1431da177e4SLinus Torvalds sprintf(p.name, "dvmrp%d", v->vifc_vifi); 1441da177e4SLinus Torvalds ifr.ifr_ifru.ifru_data = (void*)&p; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds oldfs = get_fs(); set_fs(KERNEL_DS); 1471da177e4SLinus Torvalds err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); 1481da177e4SLinus Torvalds set_fs(oldfs); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds dev = NULL; 1511da177e4SLinus Torvalds 152881d966bSEric W. Biederman if (err == 0 && (dev = __dev_get_by_name(&init_net, p.name)) != NULL) { 1531da177e4SLinus Torvalds dev->flags |= IFF_MULTICAST; 1541da177e4SLinus Torvalds 155e5ed6399SHerbert Xu in_dev = __in_dev_get_rtnl(dev); 15671e27da9SHerbert Xu if (in_dev == NULL) 1571da177e4SLinus Torvalds goto failure; 15871e27da9SHerbert Xu 15971e27da9SHerbert Xu ipv4_devconf_setall(in_dev); 16071e27da9SHerbert Xu IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds if (dev_open(dev)) 1631da177e4SLinus Torvalds goto failure; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds return dev; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds failure: 1691da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 1701da177e4SLinus Torvalds rtnl_unlock(); 1711da177e4SLinus Torvalds rtnl_lock(); 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds unregister_netdevice(dev); 1741da177e4SLinus Torvalds return NULL; 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds static int reg_vif_num = -1; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds read_lock(&mrt_lock); 1842941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(dev))->tx_bytes += skb->len; 1852941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(dev))->tx_packets++; 1861da177e4SLinus Torvalds ipmr_cache_report(skb, reg_vif_num, IGMPMSG_WHOLEPKT); 1871da177e4SLinus Torvalds read_unlock(&mrt_lock); 1881da177e4SLinus Torvalds kfree_skb(skb); 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds static struct net_device_stats *reg_vif_get_stats(struct net_device *dev) 1931da177e4SLinus Torvalds { 1942941a486SPatrick McHardy return (struct net_device_stats*)netdev_priv(dev); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds static void reg_vif_setup(struct net_device *dev) 1981da177e4SLinus Torvalds { 1991da177e4SLinus Torvalds dev->type = ARPHRD_PIMREG; 20046f25dffSKris Katterjohn dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; 2011da177e4SLinus Torvalds dev->flags = IFF_NOARP; 2021da177e4SLinus Torvalds dev->hard_start_xmit = reg_vif_xmit; 2031da177e4SLinus Torvalds dev->get_stats = reg_vif_get_stats; 2041da177e4SLinus Torvalds dev->destructor = free_netdev; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds static struct net_device *ipmr_reg_vif(void) 2081da177e4SLinus Torvalds { 2091da177e4SLinus Torvalds struct net_device *dev; 2101da177e4SLinus Torvalds struct in_device *in_dev; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds dev = alloc_netdev(sizeof(struct net_device_stats), "pimreg", 2131da177e4SLinus Torvalds reg_vif_setup); 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds if (dev == NULL) 2161da177e4SLinus Torvalds return NULL; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds if (register_netdevice(dev)) { 2191da177e4SLinus Torvalds free_netdev(dev); 2201da177e4SLinus Torvalds return NULL; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds dev->iflink = 0; 2231da177e4SLinus Torvalds 22471e27da9SHerbert Xu rcu_read_lock(); 22571e27da9SHerbert Xu if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { 22671e27da9SHerbert Xu rcu_read_unlock(); 2271da177e4SLinus Torvalds goto failure; 22871e27da9SHerbert Xu } 2291da177e4SLinus Torvalds 23071e27da9SHerbert Xu ipv4_devconf_setall(in_dev); 23171e27da9SHerbert Xu IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; 23271e27da9SHerbert Xu rcu_read_unlock(); 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds if (dev_open(dev)) 2351da177e4SLinus Torvalds goto failure; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds return dev; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds failure: 2401da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 2411da177e4SLinus Torvalds rtnl_unlock(); 2421da177e4SLinus Torvalds rtnl_lock(); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds unregister_netdevice(dev); 2451da177e4SLinus Torvalds return NULL; 2461da177e4SLinus Torvalds } 2471da177e4SLinus Torvalds #endif 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds /* 2501da177e4SLinus Torvalds * Delete a VIF entry 2511da177e4SLinus Torvalds */ 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds static int vif_delete(int vifi) 2541da177e4SLinus Torvalds { 2551da177e4SLinus Torvalds struct vif_device *v; 2561da177e4SLinus Torvalds struct net_device *dev; 2571da177e4SLinus Torvalds struct in_device *in_dev; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds if (vifi < 0 || vifi >= maxvif) 2601da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds v = &vif_table[vifi]; 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 2651da177e4SLinus Torvalds dev = v->dev; 2661da177e4SLinus Torvalds v->dev = NULL; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds if (!dev) { 2691da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2701da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 2741da177e4SLinus Torvalds if (vifi == reg_vif_num) 2751da177e4SLinus Torvalds reg_vif_num = -1; 2761da177e4SLinus Torvalds #endif 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds if (vifi+1 == maxvif) { 2791da177e4SLinus Torvalds int tmp; 2801da177e4SLinus Torvalds for (tmp=vifi-1; tmp>=0; tmp--) { 2811da177e4SLinus Torvalds if (VIF_EXISTS(tmp)) 2821da177e4SLinus Torvalds break; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds maxvif = tmp+1; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds dev_set_allmulti(dev, -1); 2901da177e4SLinus Torvalds 291e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { 29242f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; 2931da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 2971da177e4SLinus Torvalds unregister_netdevice(dev); 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds dev_put(dev); 3001da177e4SLinus Torvalds return 0; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds /* Destroy an unresolved cache entry, killing queued skbs 3041da177e4SLinus Torvalds and reporting error to netlink readers. 3051da177e4SLinus Torvalds */ 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds static void ipmr_destroy_unres(struct mfc_cache *c) 3081da177e4SLinus Torvalds { 3091da177e4SLinus Torvalds struct sk_buff *skb; 3109ef1d4c7SPatrick McHardy struct nlmsgerr *e; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds atomic_dec(&cache_resolve_queue_len); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds while ((skb=skb_dequeue(&c->mfc_un.unres.unresolved))) { 315eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 3161da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 3171da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 3181da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 3191da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 3209ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 3219ef1d4c7SPatrick McHardy e->error = -ETIMEDOUT; 3229ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 3232942e900SThomas Graf 324*97c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 3251da177e4SLinus Torvalds } else 3261da177e4SLinus Torvalds kfree_skb(skb); 3271da177e4SLinus Torvalds } 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds /* Single timer process for all the unresolved queue. */ 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds static void ipmr_expire_process(unsigned long dummy) 3361da177e4SLinus Torvalds { 3371da177e4SLinus Torvalds unsigned long now; 3381da177e4SLinus Torvalds unsigned long expires; 3391da177e4SLinus Torvalds struct mfc_cache *c, **cp; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds if (!spin_trylock(&mfc_unres_lock)) { 3421da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies+HZ/10); 3431da177e4SLinus Torvalds return; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) == 0) 3471da177e4SLinus Torvalds goto out; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds now = jiffies; 3501da177e4SLinus Torvalds expires = 10*HZ; 3511da177e4SLinus Torvalds cp = &mfc_unres_queue; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds while ((c=*cp) != NULL) { 3541da177e4SLinus Torvalds if (time_after(c->mfc_un.unres.expires, now)) { 3551da177e4SLinus Torvalds unsigned long interval = c->mfc_un.unres.expires - now; 3561da177e4SLinus Torvalds if (interval < expires) 3571da177e4SLinus Torvalds expires = interval; 3581da177e4SLinus Torvalds cp = &c->next; 3591da177e4SLinus Torvalds continue; 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds *cp = c->next; 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds ipmr_destroy_unres(c); 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)) 3681da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies + expires); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds out: 3711da177e4SLinus Torvalds spin_unlock(&mfc_unres_lock); 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds /* Fill oifs list. It is called under write locked mrt_lock. */ 3751da177e4SLinus Torvalds 376d1b04c08SBaruch Even static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls) 3771da177e4SLinus Torvalds { 3781da177e4SLinus Torvalds int vifi; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds cache->mfc_un.res.minvif = MAXVIFS; 3811da177e4SLinus Torvalds cache->mfc_un.res.maxvif = 0; 3821da177e4SLinus Torvalds memset(cache->mfc_un.res.ttls, 255, MAXVIFS); 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds for (vifi=0; vifi<maxvif; vifi++) { 3851da177e4SLinus Torvalds if (VIF_EXISTS(vifi) && ttls[vifi] && ttls[vifi] < 255) { 3861da177e4SLinus Torvalds cache->mfc_un.res.ttls[vifi] = ttls[vifi]; 3871da177e4SLinus Torvalds if (cache->mfc_un.res.minvif > vifi) 3881da177e4SLinus Torvalds cache->mfc_un.res.minvif = vifi; 3891da177e4SLinus Torvalds if (cache->mfc_un.res.maxvif <= vifi) 3901da177e4SLinus Torvalds cache->mfc_un.res.maxvif = vifi + 1; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds static int vif_add(struct vifctl *vifc, int mrtsock) 3961da177e4SLinus Torvalds { 3971da177e4SLinus Torvalds int vifi = vifc->vifc_vifi; 3981da177e4SLinus Torvalds struct vif_device *v = &vif_table[vifi]; 3991da177e4SLinus Torvalds struct net_device *dev; 4001da177e4SLinus Torvalds struct in_device *in_dev; 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds /* Is vif busy ? */ 4031da177e4SLinus Torvalds if (VIF_EXISTS(vifi)) 4041da177e4SLinus Torvalds return -EADDRINUSE; 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds switch (vifc->vifc_flags) { 4071da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4081da177e4SLinus Torvalds case VIFF_REGISTER: 4091da177e4SLinus Torvalds /* 4101da177e4SLinus Torvalds * Special Purpose VIF in PIM 4111da177e4SLinus Torvalds * All the packets will be sent to the daemon 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds if (reg_vif_num >= 0) 4141da177e4SLinus Torvalds return -EADDRINUSE; 4151da177e4SLinus Torvalds dev = ipmr_reg_vif(); 4161da177e4SLinus Torvalds if (!dev) 4171da177e4SLinus Torvalds return -ENOBUFS; 4181da177e4SLinus Torvalds break; 4191da177e4SLinus Torvalds #endif 4201da177e4SLinus Torvalds case VIFF_TUNNEL: 4211da177e4SLinus Torvalds dev = ipmr_new_tunnel(vifc); 4221da177e4SLinus Torvalds if (!dev) 4231da177e4SLinus Torvalds return -ENOBUFS; 4241da177e4SLinus Torvalds break; 4251da177e4SLinus Torvalds case 0: 4261da177e4SLinus Torvalds dev = ip_dev_find(vifc->vifc_lcl_addr.s_addr); 4271da177e4SLinus Torvalds if (!dev) 4281da177e4SLinus Torvalds return -EADDRNOTAVAIL; 42915333061SStephen Hemminger dev_put(dev); 4301da177e4SLinus Torvalds break; 4311da177e4SLinus Torvalds default: 4321da177e4SLinus Torvalds return -EINVAL; 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 435e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) 4361da177e4SLinus Torvalds return -EADDRNOTAVAIL; 43742f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; 4381da177e4SLinus Torvalds dev_set_allmulti(dev, +1); 4391da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * Fill in the VIF structures 4431da177e4SLinus Torvalds */ 4441da177e4SLinus Torvalds v->rate_limit=vifc->vifc_rate_limit; 4451da177e4SLinus Torvalds v->local=vifc->vifc_lcl_addr.s_addr; 4461da177e4SLinus Torvalds v->remote=vifc->vifc_rmt_addr.s_addr; 4471da177e4SLinus Torvalds v->flags=vifc->vifc_flags; 4481da177e4SLinus Torvalds if (!mrtsock) 4491da177e4SLinus Torvalds v->flags |= VIFF_STATIC; 4501da177e4SLinus Torvalds v->threshold=vifc->vifc_threshold; 4511da177e4SLinus Torvalds v->bytes_in = 0; 4521da177e4SLinus Torvalds v->bytes_out = 0; 4531da177e4SLinus Torvalds v->pkt_in = 0; 4541da177e4SLinus Torvalds v->pkt_out = 0; 4551da177e4SLinus Torvalds v->link = dev->ifindex; 4561da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 4571da177e4SLinus Torvalds v->link = dev->iflink; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds /* And finish update writing critical data */ 4601da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 4611da177e4SLinus Torvalds dev_hold(dev); 4621da177e4SLinus Torvalds v->dev=dev; 4631da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4641da177e4SLinus Torvalds if (v->flags&VIFF_REGISTER) 4651da177e4SLinus Torvalds reg_vif_num = vifi; 4661da177e4SLinus Torvalds #endif 4671da177e4SLinus Torvalds if (vifi+1 > maxvif) 4681da177e4SLinus Torvalds maxvif = vifi+1; 4691da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 4701da177e4SLinus Torvalds return 0; 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds 473114c7844SAl Viro static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp) 4741da177e4SLinus Torvalds { 4751da177e4SLinus Torvalds int line=MFC_HASH(mcastgrp,origin); 4761da177e4SLinus Torvalds struct mfc_cache *c; 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds for (c=mfc_cache_array[line]; c; c = c->next) { 4791da177e4SLinus Torvalds if (c->mfc_origin==origin && c->mfc_mcastgrp==mcastgrp) 4801da177e4SLinus Torvalds break; 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds return c; 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /* 4861da177e4SLinus Torvalds * Allocate a multicast cache entry 4871da177e4SLinus Torvalds */ 4881da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc(void) 4891da177e4SLinus Torvalds { 490c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); 4911da177e4SLinus Torvalds if (c==NULL) 4921da177e4SLinus Torvalds return NULL; 4931da177e4SLinus Torvalds c->mfc_un.res.minvif = MAXVIFS; 4941da177e4SLinus Torvalds return c; 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc_unres(void) 4981da177e4SLinus Torvalds { 499c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); 5001da177e4SLinus Torvalds if (c==NULL) 5011da177e4SLinus Torvalds return NULL; 5021da177e4SLinus Torvalds skb_queue_head_init(&c->mfc_un.unres.unresolved); 5031da177e4SLinus Torvalds c->mfc_un.unres.expires = jiffies + 10*HZ; 5041da177e4SLinus Torvalds return c; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds /* 5081da177e4SLinus Torvalds * A cache entry has gone into a resolved state from queued 5091da177e4SLinus Torvalds */ 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) 5121da177e4SLinus Torvalds { 5131da177e4SLinus Torvalds struct sk_buff *skb; 5149ef1d4c7SPatrick McHardy struct nlmsgerr *e; 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds /* 5171da177e4SLinus Torvalds * Play the pending entries through our router 5181da177e4SLinus Torvalds */ 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds while ((skb=__skb_dequeue(&uc->mfc_un.unres.unresolved))) { 521eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 5221da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds if (ipmr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) { 52527a884dcSArnaldo Carvalho de Melo nlh->nlmsg_len = (skb_tail_pointer(skb) - 52627a884dcSArnaldo Carvalho de Melo (u8 *)nlh); 5271da177e4SLinus Torvalds } else { 5281da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 5291da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 5301da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 5319ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 5329ef1d4c7SPatrick McHardy e->error = -EMSGSIZE; 5339ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 5341da177e4SLinus Torvalds } 5352942e900SThomas Graf 536*97c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 5371da177e4SLinus Torvalds } else 5381da177e4SLinus Torvalds ip_mr_forward(skb, c, 0); 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds /* 5431da177e4SLinus Torvalds * Bounce a cache query up to mrouted. We could use netlink for this but mrouted 5441da177e4SLinus Torvalds * expects the following bizarre scheme. 5451da177e4SLinus Torvalds * 5461da177e4SLinus Torvalds * Called under mrt_lock. 5471da177e4SLinus Torvalds */ 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert) 5501da177e4SLinus Torvalds { 5511da177e4SLinus Torvalds struct sk_buff *skb; 552c9bdd4b5SArnaldo Carvalho de Melo const int ihl = ip_hdrlen(pkt); 5531da177e4SLinus Torvalds struct igmphdr *igmp; 5541da177e4SLinus Torvalds struct igmpmsg *msg; 5551da177e4SLinus Torvalds int ret; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5581da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) 5591da177e4SLinus Torvalds skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); 5601da177e4SLinus Torvalds else 5611da177e4SLinus Torvalds #endif 5621da177e4SLinus Torvalds skb = alloc_skb(128, GFP_ATOMIC); 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds if (!skb) 5651da177e4SLinus Torvalds return -ENOBUFS; 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5681da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) { 5691da177e4SLinus Torvalds /* Ugly, but we have no choice with this interface. 5701da177e4SLinus Torvalds Duplicate old header, fix ihl, length etc. 5711da177e4SLinus Torvalds And all this only to mangle msg->im_msgtype and 5721da177e4SLinus Torvalds to set msg->im_mbz to "mbz" :-) 5731da177e4SLinus Torvalds */ 574878c8145SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 575878c8145SArnaldo Carvalho de Melo skb_reset_network_header(skb); 576badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 5770272ffc4SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 578d56f90a7SArnaldo Carvalho de Melo memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); 5791da177e4SLinus Torvalds msg->im_msgtype = IGMPMSG_WHOLEPKT; 5801da177e4SLinus Torvalds msg->im_mbz = 0; 5811da177e4SLinus Torvalds msg->im_vif = reg_vif_num; 582eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; 583eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + 584eddc9ec5SArnaldo Carvalho de Melo sizeof(struct iphdr)); 5851da177e4SLinus Torvalds } else 5861da177e4SLinus Torvalds #endif 5871da177e4SLinus Torvalds { 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds /* 5901da177e4SLinus Torvalds * Copy the IP header 5911da177e4SLinus Torvalds */ 5921da177e4SLinus Torvalds 59327a884dcSArnaldo Carvalho de Melo skb->network_header = skb->tail; 594ddc7b8e3SArnaldo Carvalho de Melo skb_put(skb, ihl); 59527d7ff46SArnaldo Carvalho de Melo skb_copy_to_linear_data(skb, pkt->data, ihl); 596eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->protocol = 0; /* Flag to the kernel this is a route add */ 597eddc9ec5SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 5981da177e4SLinus Torvalds msg->im_vif = vifi; 5991da177e4SLinus Torvalds skb->dst = dst_clone(pkt->dst); 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds /* 6021da177e4SLinus Torvalds * Add our header 6031da177e4SLinus Torvalds */ 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds igmp=(struct igmphdr *)skb_put(skb,sizeof(struct igmphdr)); 6061da177e4SLinus Torvalds igmp->type = 6071da177e4SLinus Torvalds msg->im_msgtype = assert; 6081da177e4SLinus Torvalds igmp->code = 0; 609eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ 610b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds if (mroute_socket == NULL) { 6141da177e4SLinus Torvalds kfree_skb(skb); 6151da177e4SLinus Torvalds return -EINVAL; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds /* 6191da177e4SLinus Torvalds * Deliver to mrouted 6201da177e4SLinus Torvalds */ 6211da177e4SLinus Torvalds if ((ret=sock_queue_rcv_skb(mroute_socket,skb))<0) { 6221da177e4SLinus Torvalds if (net_ratelimit()) 6231da177e4SLinus Torvalds printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n"); 6241da177e4SLinus Torvalds kfree_skb(skb); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds return ret; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds /* 6311da177e4SLinus Torvalds * Queue a packet for resolution. It gets locked cache entry! 6321da177e4SLinus Torvalds */ 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds static int 6351da177e4SLinus Torvalds ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb) 6361da177e4SLinus Torvalds { 6371da177e4SLinus Torvalds int err; 6381da177e4SLinus Torvalds struct mfc_cache *c; 639eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 6421da177e4SLinus Torvalds for (c=mfc_unres_queue; c; c=c->next) { 643eddc9ec5SArnaldo Carvalho de Melo if (c->mfc_mcastgrp == iph->daddr && 644eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin == iph->saddr) 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds if (c == NULL) { 6491da177e4SLinus Torvalds /* 6501da177e4SLinus Torvalds * Create a new entry if allowable 6511da177e4SLinus Torvalds */ 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)>=10 || 6541da177e4SLinus Torvalds (c=ipmr_cache_alloc_unres())==NULL) { 6551da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds kfree_skb(skb); 6581da177e4SLinus Torvalds return -ENOBUFS; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds /* 6621da177e4SLinus Torvalds * Fill in the new cache entry 6631da177e4SLinus Torvalds */ 6641da177e4SLinus Torvalds c->mfc_parent = -1; 665eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin = iph->saddr; 666eddc9ec5SArnaldo Carvalho de Melo c->mfc_mcastgrp = iph->daddr; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* 6691da177e4SLinus Torvalds * Reflect first query at mrouted. 6701da177e4SLinus Torvalds */ 6711da177e4SLinus Torvalds if ((err = ipmr_cache_report(skb, vifi, IGMPMSG_NOCACHE))<0) { 6721da177e4SLinus Torvalds /* If the report failed throw the cache entry 6731da177e4SLinus Torvalds out - Brad Parker 6741da177e4SLinus Torvalds */ 6751da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 6781da177e4SLinus Torvalds kfree_skb(skb); 6791da177e4SLinus Torvalds return err; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds atomic_inc(&cache_resolve_queue_len); 6831da177e4SLinus Torvalds c->next = mfc_unres_queue; 6841da177e4SLinus Torvalds mfc_unres_queue = c; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires); 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * See if we can append the packet 6911da177e4SLinus Torvalds */ 6921da177e4SLinus Torvalds if (c->mfc_un.unres.unresolved.qlen>3) { 6931da177e4SLinus Torvalds kfree_skb(skb); 6941da177e4SLinus Torvalds err = -ENOBUFS; 6951da177e4SLinus Torvalds } else { 6961da177e4SLinus Torvalds skb_queue_tail(&c->mfc_un.unres.unresolved,skb); 6971da177e4SLinus Torvalds err = 0; 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7011da177e4SLinus Torvalds return err; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds /* 7051da177e4SLinus Torvalds * MFC cache manipulation by user space mroute daemon 7061da177e4SLinus Torvalds */ 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds static int ipmr_mfc_delete(struct mfcctl *mfc) 7091da177e4SLinus Torvalds { 7101da177e4SLinus Torvalds int line; 7111da177e4SLinus Torvalds struct mfc_cache *c, **cp; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7161da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7171da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) { 7181da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7191da177e4SLinus Torvalds *cp = c->next; 7201da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 7231da177e4SLinus Torvalds return 0; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds } 7261da177e4SLinus Torvalds return -ENOENT; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds int line; 7321da177e4SLinus Torvalds struct mfc_cache *uc, *c, **cp; 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7371da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7381da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) 7391da177e4SLinus Torvalds break; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds if (c != NULL) { 7431da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7441da177e4SLinus Torvalds c->mfc_parent = mfc->mfcc_parent; 745d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7461da177e4SLinus Torvalds if (!mrtsock) 7471da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7481da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7491da177e4SLinus Torvalds return 0; 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds if (!MULTICAST(mfc->mfcc_mcastgrp.s_addr)) 7531da177e4SLinus Torvalds return -EINVAL; 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds c=ipmr_cache_alloc(); 7561da177e4SLinus Torvalds if (c==NULL) 7571da177e4SLinus Torvalds return -ENOMEM; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds c->mfc_origin=mfc->mfcc_origin.s_addr; 7601da177e4SLinus Torvalds c->mfc_mcastgrp=mfc->mfcc_mcastgrp.s_addr; 7611da177e4SLinus Torvalds c->mfc_parent=mfc->mfcc_parent; 762d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7631da177e4SLinus Torvalds if (!mrtsock) 7641da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7671da177e4SLinus Torvalds c->next = mfc_cache_array[line]; 7681da177e4SLinus Torvalds mfc_cache_array[line] = c; 7691da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds /* 7721da177e4SLinus Torvalds * Check to see if we resolved a queued list. If so we 7731da177e4SLinus Torvalds * need to send on the frames and tidy up. 7741da177e4SLinus Torvalds */ 7751da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 7761da177e4SLinus Torvalds for (cp = &mfc_unres_queue; (uc=*cp) != NULL; 7771da177e4SLinus Torvalds cp = &uc->next) { 7781da177e4SLinus Torvalds if (uc->mfc_origin == c->mfc_origin && 7791da177e4SLinus Torvalds uc->mfc_mcastgrp == c->mfc_mcastgrp) { 7801da177e4SLinus Torvalds *cp = uc->next; 7811da177e4SLinus Torvalds if (atomic_dec_and_test(&cache_resolve_queue_len)) 7821da177e4SLinus Torvalds del_timer(&ipmr_expire_timer); 7831da177e4SLinus Torvalds break; 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds if (uc) { 7891da177e4SLinus Torvalds ipmr_cache_resolve(uc, c); 7901da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, uc); 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds return 0; 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds /* 7961da177e4SLinus Torvalds * Close the multicast socket, and clear the vif tables etc 7971da177e4SLinus Torvalds */ 7981da177e4SLinus Torvalds 7991da177e4SLinus Torvalds static void mroute_clean_tables(struct sock *sk) 8001da177e4SLinus Torvalds { 8011da177e4SLinus Torvalds int i; 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds /* 8041da177e4SLinus Torvalds * Shut down all active vif entries 8051da177e4SLinus Torvalds */ 8061da177e4SLinus Torvalds for (i=0; i<maxvif; i++) { 8071da177e4SLinus Torvalds if (!(vif_table[i].flags&VIFF_STATIC)) 8081da177e4SLinus Torvalds vif_delete(i); 8091da177e4SLinus Torvalds } 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds /* 8121da177e4SLinus Torvalds * Wipe the cache 8131da177e4SLinus Torvalds */ 8141da177e4SLinus Torvalds for (i=0;i<MFC_LINES;i++) { 8151da177e4SLinus Torvalds struct mfc_cache *c, **cp; 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds cp = &mfc_cache_array[i]; 8181da177e4SLinus Torvalds while ((c = *cp) != NULL) { 8191da177e4SLinus Torvalds if (c->mfc_flags&MFC_STATIC) { 8201da177e4SLinus Torvalds cp = &c->next; 8211da177e4SLinus Torvalds continue; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8241da177e4SLinus Torvalds *cp = c->next; 8251da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds } 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) != 0) { 8321da177e4SLinus Torvalds struct mfc_cache *c; 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8351da177e4SLinus Torvalds while (mfc_unres_queue != NULL) { 8361da177e4SLinus Torvalds c = mfc_unres_queue; 8371da177e4SLinus Torvalds mfc_unres_queue = c->next; 8381da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds ipmr_destroy_unres(c); 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static void mrtsock_destruct(struct sock *sk) 8491da177e4SLinus Torvalds { 8501da177e4SLinus Torvalds rtnl_lock(); 8511da177e4SLinus Torvalds if (sk == mroute_socket) { 85242f811b8SHerbert Xu IPV4_DEVCONF_ALL(MC_FORWARDING)--; 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8551da177e4SLinus Torvalds mroute_socket=NULL; 8561da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds mroute_clean_tables(sk); 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds rtnl_unlock(); 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds /* 8641da177e4SLinus Torvalds * Socket options and virtual interface manipulation. The whole 8651da177e4SLinus Torvalds * virtual interface system is a complete heap, but unfortunately 8661da177e4SLinus Torvalds * that's how BSD mrouted happens to think. Maybe one day with a proper 8671da177e4SLinus Torvalds * MOSPF/PIM router set up we can clean this up. 8681da177e4SLinus Torvalds */ 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int optlen) 8711da177e4SLinus Torvalds { 8721da177e4SLinus Torvalds int ret; 8731da177e4SLinus Torvalds struct vifctl vif; 8741da177e4SLinus Torvalds struct mfcctl mfc; 8751da177e4SLinus Torvalds 876132adf54SStephen Hemminger if (optname != MRT_INIT) { 8771da177e4SLinus Torvalds if (sk != mroute_socket && !capable(CAP_NET_ADMIN)) 8781da177e4SLinus Torvalds return -EACCES; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 881132adf54SStephen Hemminger switch (optname) { 8821da177e4SLinus Torvalds case MRT_INIT: 8831da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || 8841da177e4SLinus Torvalds inet_sk(sk)->num != IPPROTO_IGMP) 8851da177e4SLinus Torvalds return -EOPNOTSUPP; 8861da177e4SLinus Torvalds if (optlen!=sizeof(int)) 8871da177e4SLinus Torvalds return -ENOPROTOOPT; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds rtnl_lock(); 8901da177e4SLinus Torvalds if (mroute_socket) { 8911da177e4SLinus Torvalds rtnl_unlock(); 8921da177e4SLinus Torvalds return -EADDRINUSE; 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds ret = ip_ra_control(sk, 1, mrtsock_destruct); 8961da177e4SLinus Torvalds if (ret == 0) { 8971da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8981da177e4SLinus Torvalds mroute_socket=sk; 8991da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 9001da177e4SLinus Torvalds 90142f811b8SHerbert Xu IPV4_DEVCONF_ALL(MC_FORWARDING)++; 9021da177e4SLinus Torvalds } 9031da177e4SLinus Torvalds rtnl_unlock(); 9041da177e4SLinus Torvalds return ret; 9051da177e4SLinus Torvalds case MRT_DONE: 9061da177e4SLinus Torvalds if (sk!=mroute_socket) 9071da177e4SLinus Torvalds return -EACCES; 9081da177e4SLinus Torvalds return ip_ra_control(sk, 0, NULL); 9091da177e4SLinus Torvalds case MRT_ADD_VIF: 9101da177e4SLinus Torvalds case MRT_DEL_VIF: 9111da177e4SLinus Torvalds if (optlen!=sizeof(vif)) 9121da177e4SLinus Torvalds return -EINVAL; 9131da177e4SLinus Torvalds if (copy_from_user(&vif,optval,sizeof(vif))) 9141da177e4SLinus Torvalds return -EFAULT; 9151da177e4SLinus Torvalds if (vif.vifc_vifi >= MAXVIFS) 9161da177e4SLinus Torvalds return -ENFILE; 9171da177e4SLinus Torvalds rtnl_lock(); 9181da177e4SLinus Torvalds if (optname==MRT_ADD_VIF) { 9191da177e4SLinus Torvalds ret = vif_add(&vif, sk==mroute_socket); 9201da177e4SLinus Torvalds } else { 9211da177e4SLinus Torvalds ret = vif_delete(vif.vifc_vifi); 9221da177e4SLinus Torvalds } 9231da177e4SLinus Torvalds rtnl_unlock(); 9241da177e4SLinus Torvalds return ret; 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds /* 9271da177e4SLinus Torvalds * Manipulate the forwarding caches. These live 9281da177e4SLinus Torvalds * in a sort of kernel/user symbiosis. 9291da177e4SLinus Torvalds */ 9301da177e4SLinus Torvalds case MRT_ADD_MFC: 9311da177e4SLinus Torvalds case MRT_DEL_MFC: 9321da177e4SLinus Torvalds if (optlen!=sizeof(mfc)) 9331da177e4SLinus Torvalds return -EINVAL; 9341da177e4SLinus Torvalds if (copy_from_user(&mfc,optval, sizeof(mfc))) 9351da177e4SLinus Torvalds return -EFAULT; 9361da177e4SLinus Torvalds rtnl_lock(); 9371da177e4SLinus Torvalds if (optname==MRT_DEL_MFC) 9381da177e4SLinus Torvalds ret = ipmr_mfc_delete(&mfc); 9391da177e4SLinus Torvalds else 9401da177e4SLinus Torvalds ret = ipmr_mfc_add(&mfc, sk==mroute_socket); 9411da177e4SLinus Torvalds rtnl_unlock(); 9421da177e4SLinus Torvalds return ret; 9431da177e4SLinus Torvalds /* 9441da177e4SLinus Torvalds * Control PIM assert. 9451da177e4SLinus Torvalds */ 9461da177e4SLinus Torvalds case MRT_ASSERT: 9471da177e4SLinus Torvalds { 9481da177e4SLinus Torvalds int v; 9491da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9501da177e4SLinus Torvalds return -EFAULT; 9511da177e4SLinus Torvalds mroute_do_assert=(v)?1:0; 9521da177e4SLinus Torvalds return 0; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 9551da177e4SLinus Torvalds case MRT_PIM: 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds int v, ret; 9581da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9591da177e4SLinus Torvalds return -EFAULT; 9601da177e4SLinus Torvalds v = (v)?1:0; 9611da177e4SLinus Torvalds rtnl_lock(); 9621da177e4SLinus Torvalds ret = 0; 9631da177e4SLinus Torvalds if (v != mroute_do_pim) { 9641da177e4SLinus Torvalds mroute_do_pim = v; 9651da177e4SLinus Torvalds mroute_do_assert = v; 9661da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 9671da177e4SLinus Torvalds if (mroute_do_pim) 9681da177e4SLinus Torvalds ret = inet_add_protocol(&pim_protocol, 9691da177e4SLinus Torvalds IPPROTO_PIM); 9701da177e4SLinus Torvalds else 9711da177e4SLinus Torvalds ret = inet_del_protocol(&pim_protocol, 9721da177e4SLinus Torvalds IPPROTO_PIM); 9731da177e4SLinus Torvalds if (ret < 0) 9741da177e4SLinus Torvalds ret = -EAGAIN; 9751da177e4SLinus Torvalds #endif 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds rtnl_unlock(); 9781da177e4SLinus Torvalds return ret; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds #endif 9811da177e4SLinus Torvalds /* 9821da177e4SLinus Torvalds * Spurious command, or MRT_VERSION which you cannot 9831da177e4SLinus Torvalds * set. 9841da177e4SLinus Torvalds */ 9851da177e4SLinus Torvalds default: 9861da177e4SLinus Torvalds return -ENOPROTOOPT; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds /* 9911da177e4SLinus Torvalds * Getsock opt support for the multicast routing system. 9921da177e4SLinus Torvalds */ 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds int ip_mroute_getsockopt(struct sock *sk,int optname,char __user *optval,int __user *optlen) 9951da177e4SLinus Torvalds { 9961da177e4SLinus Torvalds int olr; 9971da177e4SLinus Torvalds int val; 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds if (optname!=MRT_VERSION && 10001da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10011da177e4SLinus Torvalds optname!=MRT_PIM && 10021da177e4SLinus Torvalds #endif 10031da177e4SLinus Torvalds optname!=MRT_ASSERT) 10041da177e4SLinus Torvalds return -ENOPROTOOPT; 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds if (get_user(olr, optlen)) 10071da177e4SLinus Torvalds return -EFAULT; 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds olr = min_t(unsigned int, olr, sizeof(int)); 10101da177e4SLinus Torvalds if (olr < 0) 10111da177e4SLinus Torvalds return -EINVAL; 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds if (put_user(olr,optlen)) 10141da177e4SLinus Torvalds return -EFAULT; 10151da177e4SLinus Torvalds if (optname==MRT_VERSION) 10161da177e4SLinus Torvalds val=0x0305; 10171da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10181da177e4SLinus Torvalds else if (optname==MRT_PIM) 10191da177e4SLinus Torvalds val=mroute_do_pim; 10201da177e4SLinus Torvalds #endif 10211da177e4SLinus Torvalds else 10221da177e4SLinus Torvalds val=mroute_do_assert; 10231da177e4SLinus Torvalds if (copy_to_user(optval,&val,olr)) 10241da177e4SLinus Torvalds return -EFAULT; 10251da177e4SLinus Torvalds return 0; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds /* 10291da177e4SLinus Torvalds * The IP multicast ioctl support routines. 10301da177e4SLinus Torvalds */ 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 10331da177e4SLinus Torvalds { 10341da177e4SLinus Torvalds struct sioc_sg_req sr; 10351da177e4SLinus Torvalds struct sioc_vif_req vr; 10361da177e4SLinus Torvalds struct vif_device *vif; 10371da177e4SLinus Torvalds struct mfc_cache *c; 10381da177e4SLinus Torvalds 1039132adf54SStephen Hemminger switch (cmd) { 10401da177e4SLinus Torvalds case SIOCGETVIFCNT: 10411da177e4SLinus Torvalds if (copy_from_user(&vr,arg,sizeof(vr))) 10421da177e4SLinus Torvalds return -EFAULT; 10431da177e4SLinus Torvalds if (vr.vifi>=maxvif) 10441da177e4SLinus Torvalds return -EINVAL; 10451da177e4SLinus Torvalds read_lock(&mrt_lock); 10461da177e4SLinus Torvalds vif=&vif_table[vr.vifi]; 10471da177e4SLinus Torvalds if (VIF_EXISTS(vr.vifi)) { 10481da177e4SLinus Torvalds vr.icount=vif->pkt_in; 10491da177e4SLinus Torvalds vr.ocount=vif->pkt_out; 10501da177e4SLinus Torvalds vr.ibytes=vif->bytes_in; 10511da177e4SLinus Torvalds vr.obytes=vif->bytes_out; 10521da177e4SLinus Torvalds read_unlock(&mrt_lock); 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds if (copy_to_user(arg,&vr,sizeof(vr))) 10551da177e4SLinus Torvalds return -EFAULT; 10561da177e4SLinus Torvalds return 0; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds read_unlock(&mrt_lock); 10591da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10601da177e4SLinus Torvalds case SIOCGETSGCNT: 10611da177e4SLinus Torvalds if (copy_from_user(&sr,arg,sizeof(sr))) 10621da177e4SLinus Torvalds return -EFAULT; 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds read_lock(&mrt_lock); 10651da177e4SLinus Torvalds c = ipmr_cache_find(sr.src.s_addr, sr.grp.s_addr); 10661da177e4SLinus Torvalds if (c) { 10671da177e4SLinus Torvalds sr.pktcnt = c->mfc_un.res.pkt; 10681da177e4SLinus Torvalds sr.bytecnt = c->mfc_un.res.bytes; 10691da177e4SLinus Torvalds sr.wrong_if = c->mfc_un.res.wrong_if; 10701da177e4SLinus Torvalds read_unlock(&mrt_lock); 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds if (copy_to_user(arg,&sr,sizeof(sr))) 10731da177e4SLinus Torvalds return -EFAULT; 10741da177e4SLinus Torvalds return 0; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds read_unlock(&mrt_lock); 10771da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10781da177e4SLinus Torvalds default: 10791da177e4SLinus Torvalds return -ENOIOCTLCMD; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) 10851da177e4SLinus Torvalds { 1086e9dc8653SEric W. Biederman struct net_device *dev = ptr; 10871da177e4SLinus Torvalds struct vif_device *v; 10881da177e4SLinus Torvalds int ct; 1089e9dc8653SEric W. Biederman 1090e9dc8653SEric W. Biederman if (dev->nd_net != &init_net) 1091e9dc8653SEric W. Biederman return NOTIFY_DONE; 1092e9dc8653SEric W. Biederman 10931da177e4SLinus Torvalds if (event != NETDEV_UNREGISTER) 10941da177e4SLinus Torvalds return NOTIFY_DONE; 10951da177e4SLinus Torvalds v=&vif_table[0]; 10961da177e4SLinus Torvalds for (ct=0;ct<maxvif;ct++,v++) { 1097e9dc8653SEric W. Biederman if (v->dev==dev) 10981da177e4SLinus Torvalds vif_delete(ct); 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds return NOTIFY_DONE; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds 11041da177e4SLinus Torvalds static struct notifier_block ip_mr_notifier={ 11051da177e4SLinus Torvalds .notifier_call = ipmr_device_event, 11061da177e4SLinus Torvalds }; 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds /* 11091da177e4SLinus Torvalds * Encapsulate a packet by attaching a valid IPIP header to it. 11101da177e4SLinus Torvalds * This avoids tunnel drivers and other mess and gives us the speed so 11111da177e4SLinus Torvalds * important for multicast video. 11121da177e4SLinus Torvalds */ 11131da177e4SLinus Torvalds 1114114c7844SAl Viro static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr) 11151da177e4SLinus Torvalds { 11168856dfa3SArnaldo Carvalho de Melo struct iphdr *iph; 1117eddc9ec5SArnaldo Carvalho de Melo struct iphdr *old_iph = ip_hdr(skb); 11188856dfa3SArnaldo Carvalho de Melo 11198856dfa3SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 1120b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 11218856dfa3SArnaldo Carvalho de Melo skb_reset_network_header(skb); 1122eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds iph->version = 4; 1125e023dd64SArnaldo Carvalho de Melo iph->tos = old_iph->tos; 1126e023dd64SArnaldo Carvalho de Melo iph->ttl = old_iph->ttl; 11271da177e4SLinus Torvalds iph->frag_off = 0; 11281da177e4SLinus Torvalds iph->daddr = daddr; 11291da177e4SLinus Torvalds iph->saddr = saddr; 11301da177e4SLinus Torvalds iph->protocol = IPPROTO_IPIP; 11311da177e4SLinus Torvalds iph->ihl = 5; 11321da177e4SLinus Torvalds iph->tot_len = htons(skb->len); 11331da177e4SLinus Torvalds ip_select_ident(iph, skb->dst, NULL); 11341da177e4SLinus Torvalds ip_send_check(iph); 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 11371da177e4SLinus Torvalds nf_reset(skb); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static inline int ipmr_forward_finish(struct sk_buff *skb) 11411da177e4SLinus Torvalds { 11421da177e4SLinus Torvalds struct ip_options * opt = &(IPCB(skb)->opt); 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_OUTFORWDATAGRAMS); 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds if (unlikely(opt->optlen)) 11471da177e4SLinus Torvalds ip_forward_options(skb); 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds return dst_output(skb); 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds /* 11531da177e4SLinus Torvalds * Processing handlers for ipmr_forward 11541da177e4SLinus Torvalds */ 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi) 11571da177e4SLinus Torvalds { 1158eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 11591da177e4SLinus Torvalds struct vif_device *vif = &vif_table[vifi]; 11601da177e4SLinus Torvalds struct net_device *dev; 11611da177e4SLinus Torvalds struct rtable *rt; 11621da177e4SLinus Torvalds int encap = 0; 11631da177e4SLinus Torvalds 11641da177e4SLinus Torvalds if (vif->dev == NULL) 11651da177e4SLinus Torvalds goto out_free; 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 11681da177e4SLinus Torvalds if (vif->flags & VIFF_REGISTER) { 11691da177e4SLinus Torvalds vif->pkt_out++; 11701da177e4SLinus Torvalds vif->bytes_out+=skb->len; 11712941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(vif->dev))->tx_bytes += skb->len; 11722941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(vif->dev))->tx_packets++; 11731da177e4SLinus Torvalds ipmr_cache_report(skb, vifi, IGMPMSG_WHOLEPKT); 11741da177e4SLinus Torvalds kfree_skb(skb); 11751da177e4SLinus Torvalds return; 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds #endif 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds if (vif->flags&VIFF_TUNNEL) { 11801da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11811da177e4SLinus Torvalds .nl_u = { .ip4_u = 11821da177e4SLinus Torvalds { .daddr = vif->remote, 11831da177e4SLinus Torvalds .saddr = vif->local, 11841da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11851da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 11861da177e4SLinus Torvalds if (ip_route_output_key(&rt, &fl)) 11871da177e4SLinus Torvalds goto out_free; 11881da177e4SLinus Torvalds encap = sizeof(struct iphdr); 11891da177e4SLinus Torvalds } else { 11901da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11911da177e4SLinus Torvalds .nl_u = { .ip4_u = 11921da177e4SLinus Torvalds { .daddr = iph->daddr, 11931da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11941da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 11951da177e4SLinus Torvalds if (ip_route_output_key(&rt, &fl)) 11961da177e4SLinus Torvalds goto out_free; 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds dev = rt->u.dst.dev; 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) { 12021da177e4SLinus Torvalds /* Do not fragment multicasts. Alas, IPv4 does not 12031da177e4SLinus Torvalds allow to send ICMP, so that packets will disappear 12041da177e4SLinus Torvalds to blackhole. 12051da177e4SLinus Torvalds */ 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_FRAGFAILS); 12081da177e4SLinus Torvalds ip_rt_put(rt); 12091da177e4SLinus Torvalds goto out_free; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds encap += LL_RESERVED_SPACE(dev) + rt->u.dst.header_len; 12131da177e4SLinus Torvalds 12141da177e4SLinus Torvalds if (skb_cow(skb, encap)) { 12151da177e4SLinus Torvalds ip_rt_put(rt); 12161da177e4SLinus Torvalds goto out_free; 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds vif->pkt_out++; 12201da177e4SLinus Torvalds vif->bytes_out+=skb->len; 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds dst_release(skb->dst); 12231da177e4SLinus Torvalds skb->dst = &rt->u.dst; 1224eddc9ec5SArnaldo Carvalho de Melo ip_decrease_ttl(ip_hdr(skb)); 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds /* FIXME: forward and output firewalls used to be called here. 12271da177e4SLinus Torvalds * What do we do with netfilter? -- RR */ 12281da177e4SLinus Torvalds if (vif->flags & VIFF_TUNNEL) { 12291da177e4SLinus Torvalds ip_encap(skb, vif->local, vif->remote); 12301da177e4SLinus Torvalds /* FIXME: extra output firewall step used to be here. --RR */ 12312941a486SPatrick McHardy ((struct ip_tunnel *)netdev_priv(vif->dev))->stat.tx_packets++; 12322941a486SPatrick McHardy ((struct ip_tunnel *)netdev_priv(vif->dev))->stat.tx_bytes+=skb->len; 12331da177e4SLinus Torvalds } 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds IPCB(skb)->flags |= IPSKB_FORWARDED; 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds /* 12381da177e4SLinus Torvalds * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally 12391da177e4SLinus Torvalds * not only before forwarding, but after forwarding on all output 12401da177e4SLinus Torvalds * interfaces. It is clear, if mrouter runs a multicasting 12411da177e4SLinus Torvalds * program, it should receive packets not depending to what interface 12421da177e4SLinus Torvalds * program is joined. 12431da177e4SLinus Torvalds * If we will not make it, the program will have to join on all 12441da177e4SLinus Torvalds * interfaces. On the other hand, multihoming host (or router, but 12451da177e4SLinus Torvalds * not mrouter) cannot join to more than one interface - it will 12461da177e4SLinus Torvalds * result in receiving multiple packets. 12471da177e4SLinus Torvalds */ 12486e23ae2aSPatrick McHardy NF_HOOK(PF_INET, NF_INET_FORWARD, skb, skb->dev, dev, 12491da177e4SLinus Torvalds ipmr_forward_finish); 12501da177e4SLinus Torvalds return; 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds out_free: 12531da177e4SLinus Torvalds kfree_skb(skb); 12541da177e4SLinus Torvalds return; 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds static int ipmr_find_vif(struct net_device *dev) 12581da177e4SLinus Torvalds { 12591da177e4SLinus Torvalds int ct; 12601da177e4SLinus Torvalds for (ct=maxvif-1; ct>=0; ct--) { 12611da177e4SLinus Torvalds if (vif_table[ct].dev == dev) 12621da177e4SLinus Torvalds break; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds return ct; 12651da177e4SLinus Torvalds } 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds /* "local" means that we should preserve one skb (for local delivery) */ 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local) 12701da177e4SLinus Torvalds { 12711da177e4SLinus Torvalds int psend = -1; 12721da177e4SLinus Torvalds int vif, ct; 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds vif = cache->mfc_parent; 12751da177e4SLinus Torvalds cache->mfc_un.res.pkt++; 12761da177e4SLinus Torvalds cache->mfc_un.res.bytes += skb->len; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds /* 12791da177e4SLinus Torvalds * Wrong interface: drop packet and (maybe) send PIM assert. 12801da177e4SLinus Torvalds */ 12811da177e4SLinus Torvalds if (vif_table[vif].dev != skb->dev) { 12821da177e4SLinus Torvalds int true_vifi; 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds if (((struct rtable*)skb->dst)->fl.iif == 0) { 12851da177e4SLinus Torvalds /* It is our own packet, looped back. 12861da177e4SLinus Torvalds Very complicated situation... 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds The best workaround until routing daemons will be 12891da177e4SLinus Torvalds fixed is not to redistribute packet, if it was 12901da177e4SLinus Torvalds send through wrong interface. It means, that 12911da177e4SLinus Torvalds multicast applications WILL NOT work for 12921da177e4SLinus Torvalds (S,G), which have default multicast route pointing 12931da177e4SLinus Torvalds to wrong oif. In any case, it is not a good 12941da177e4SLinus Torvalds idea to use multicasting applications on router. 12951da177e4SLinus Torvalds */ 12961da177e4SLinus Torvalds goto dont_forward; 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds cache->mfc_un.res.wrong_if++; 13001da177e4SLinus Torvalds true_vifi = ipmr_find_vif(skb->dev); 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds if (true_vifi >= 0 && mroute_do_assert && 13031da177e4SLinus Torvalds /* pimsm uses asserts, when switching from RPT to SPT, 13041da177e4SLinus Torvalds so that we cannot check that packet arrived on an oif. 13051da177e4SLinus Torvalds It is bad, but otherwise we would need to move pretty 13061da177e4SLinus Torvalds large chunk of pimd to kernel. Ough... --ANK 13071da177e4SLinus Torvalds */ 13081da177e4SLinus Torvalds (mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) && 13091da177e4SLinus Torvalds time_after(jiffies, 13101da177e4SLinus Torvalds cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { 13111da177e4SLinus Torvalds cache->mfc_un.res.last_assert = jiffies; 13121da177e4SLinus Torvalds ipmr_cache_report(skb, true_vifi, IGMPMSG_WRONGVIF); 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds goto dont_forward; 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds vif_table[vif].pkt_in++; 13181da177e4SLinus Torvalds vif_table[vif].bytes_in+=skb->len; 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds /* 13211da177e4SLinus Torvalds * Forward the frame 13221da177e4SLinus Torvalds */ 13231da177e4SLinus Torvalds for (ct = cache->mfc_un.res.maxvif-1; ct >= cache->mfc_un.res.minvif; ct--) { 1324eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { 13251da177e4SLinus Torvalds if (psend != -1) { 13261da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13271da177e4SLinus Torvalds if (skb2) 13281da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds psend=ct; 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds } 13331da177e4SLinus Torvalds if (psend != -1) { 13341da177e4SLinus Torvalds if (local) { 13351da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13361da177e4SLinus Torvalds if (skb2) 13371da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13381da177e4SLinus Torvalds } else { 13391da177e4SLinus Torvalds ipmr_queue_xmit(skb, cache, psend); 13401da177e4SLinus Torvalds return 0; 13411da177e4SLinus Torvalds } 13421da177e4SLinus Torvalds } 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds dont_forward: 13451da177e4SLinus Torvalds if (!local) 13461da177e4SLinus Torvalds kfree_skb(skb); 13471da177e4SLinus Torvalds return 0; 13481da177e4SLinus Torvalds } 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds /* 13521da177e4SLinus Torvalds * Multicast packets for forwarding arrive here 13531da177e4SLinus Torvalds */ 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds int ip_mr_input(struct sk_buff *skb) 13561da177e4SLinus Torvalds { 13571da177e4SLinus Torvalds struct mfc_cache *cache; 13581da177e4SLinus Torvalds int local = ((struct rtable*)skb->dst)->rt_flags&RTCF_LOCAL; 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds /* Packet is looped back after forward, it should not be 13611da177e4SLinus Torvalds forwarded second time, but still can be delivered locally. 13621da177e4SLinus Torvalds */ 13631da177e4SLinus Torvalds if (IPCB(skb)->flags&IPSKB_FORWARDED) 13641da177e4SLinus Torvalds goto dont_forward; 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds if (!local) { 13671da177e4SLinus Torvalds if (IPCB(skb)->opt.router_alert) { 13681da177e4SLinus Torvalds if (ip_call_ra_chain(skb)) 13691da177e4SLinus Torvalds return 0; 1370eddc9ec5SArnaldo Carvalho de Melo } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP){ 13711da177e4SLinus Torvalds /* IGMPv1 (and broken IGMPv2 implementations sort of 13721da177e4SLinus Torvalds Cisco IOS <= 11.2(8)) do not put router alert 13731da177e4SLinus Torvalds option to IGMP packets destined to routable 13741da177e4SLinus Torvalds groups. It is very bad, because it means 13751da177e4SLinus Torvalds that we can forward NO IGMP messages. 13761da177e4SLinus Torvalds */ 13771da177e4SLinus Torvalds read_lock(&mrt_lock); 13781da177e4SLinus Torvalds if (mroute_socket) { 13792715bcf9SPatrick McHardy nf_reset(skb); 13801da177e4SLinus Torvalds raw_rcv(mroute_socket, skb); 13811da177e4SLinus Torvalds read_unlock(&mrt_lock); 13821da177e4SLinus Torvalds return 0; 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds read_unlock(&mrt_lock); 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds read_lock(&mrt_lock); 1389eddc9ec5SArnaldo Carvalho de Melo cache = ipmr_cache_find(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds /* 13921da177e4SLinus Torvalds * No usable cache entry 13931da177e4SLinus Torvalds */ 13941da177e4SLinus Torvalds if (cache==NULL) { 13951da177e4SLinus Torvalds int vif; 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds if (local) { 13981da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13991da177e4SLinus Torvalds ip_local_deliver(skb); 14001da177e4SLinus Torvalds if (skb2 == NULL) { 14011da177e4SLinus Torvalds read_unlock(&mrt_lock); 14021da177e4SLinus Torvalds return -ENOBUFS; 14031da177e4SLinus Torvalds } 14041da177e4SLinus Torvalds skb = skb2; 14051da177e4SLinus Torvalds } 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds vif = ipmr_find_vif(skb->dev); 14081da177e4SLinus Torvalds if (vif >= 0) { 14091da177e4SLinus Torvalds int err = ipmr_cache_unresolved(vif, skb); 14101da177e4SLinus Torvalds read_unlock(&mrt_lock); 14111da177e4SLinus Torvalds 14121da177e4SLinus Torvalds return err; 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds read_unlock(&mrt_lock); 14151da177e4SLinus Torvalds kfree_skb(skb); 14161da177e4SLinus Torvalds return -ENODEV; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds ip_mr_forward(skb, cache, local); 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds read_unlock(&mrt_lock); 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds if (local) 14241da177e4SLinus Torvalds return ip_local_deliver(skb); 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds return 0; 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds dont_forward: 14291da177e4SLinus Torvalds if (local) 14301da177e4SLinus Torvalds return ip_local_deliver(skb); 14311da177e4SLinus Torvalds kfree_skb(skb); 14321da177e4SLinus Torvalds return 0; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V1 14361da177e4SLinus Torvalds /* 14371da177e4SLinus Torvalds * Handle IGMP messages of PIMv1 14381da177e4SLinus Torvalds */ 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds int pim_rcv_v1(struct sk_buff * skb) 14411da177e4SLinus Torvalds { 14421da177e4SLinus Torvalds struct igmphdr *pim; 14431da177e4SLinus Torvalds struct iphdr *encap; 14441da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 14471da177e4SLinus Torvalds goto drop; 14481da177e4SLinus Torvalds 1449d9edf9e2SArnaldo Carvalho de Melo pim = igmp_hdr(skb); 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds if (!mroute_do_pim || 14521da177e4SLinus Torvalds skb->len < sizeof(*pim) + sizeof(*encap) || 14531da177e4SLinus Torvalds pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) 14541da177e4SLinus Torvalds goto drop; 14551da177e4SLinus Torvalds 14569c70220bSArnaldo Carvalho de Melo encap = (struct iphdr *)(skb_transport_header(skb) + 14579c70220bSArnaldo Carvalho de Melo sizeof(struct igmphdr)); 14581da177e4SLinus Torvalds /* 14591da177e4SLinus Torvalds Check that: 14601da177e4SLinus Torvalds a. packet is really destinted to a multicast group 14611da177e4SLinus Torvalds b. packet is not a NULL-REGISTER 14621da177e4SLinus Torvalds c. packet is not truncated 14631da177e4SLinus Torvalds */ 14641da177e4SLinus Torvalds if (!MULTICAST(encap->daddr) || 14651da177e4SLinus Torvalds encap->tot_len == 0 || 14661da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 14671da177e4SLinus Torvalds goto drop; 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds read_lock(&mrt_lock); 14701da177e4SLinus Torvalds if (reg_vif_num >= 0) 14711da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 14721da177e4SLinus Torvalds if (reg_dev) 14731da177e4SLinus Torvalds dev_hold(reg_dev); 14741da177e4SLinus Torvalds read_unlock(&mrt_lock); 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds if (reg_dev == NULL) 14771da177e4SLinus Torvalds goto drop; 14781da177e4SLinus Torvalds 1479b0e380b1SArnaldo Carvalho de Melo skb->mac_header = skb->network_header; 14801da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 148131c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 14821da177e4SLinus Torvalds skb->dev = reg_dev; 14831da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 14841da177e4SLinus Torvalds skb->ip_summed = 0; 14851da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 14861da177e4SLinus Torvalds dst_release(skb->dst); 14871da177e4SLinus Torvalds skb->dst = NULL; 14882941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_bytes += skb->len; 14892941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_packets++; 14901da177e4SLinus Torvalds nf_reset(skb); 14911da177e4SLinus Torvalds netif_rx(skb); 14921da177e4SLinus Torvalds dev_put(reg_dev); 14931da177e4SLinus Torvalds return 0; 14941da177e4SLinus Torvalds drop: 14951da177e4SLinus Torvalds kfree_skb(skb); 14961da177e4SLinus Torvalds return 0; 14971da177e4SLinus Torvalds } 14981da177e4SLinus Torvalds #endif 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 15011da177e4SLinus Torvalds static int pim_rcv(struct sk_buff * skb) 15021da177e4SLinus Torvalds { 15031da177e4SLinus Torvalds struct pimreghdr *pim; 15041da177e4SLinus Torvalds struct iphdr *encap; 15051da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 15081da177e4SLinus Torvalds goto drop; 15091da177e4SLinus Torvalds 15109c70220bSArnaldo Carvalho de Melo pim = (struct pimreghdr *)skb_transport_header(skb); 15111da177e4SLinus Torvalds if (pim->type != ((PIM_VERSION<<4)|(PIM_REGISTER)) || 15121da177e4SLinus Torvalds (pim->flags&PIM_NULL_REGISTER) || 15131da177e4SLinus Torvalds (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && 1514d3bc23e7SAl Viro csum_fold(skb_checksum(skb, 0, skb->len, 0)))) 15151da177e4SLinus Torvalds goto drop; 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds /* check if the inner packet is destined to mcast group */ 15189c70220bSArnaldo Carvalho de Melo encap = (struct iphdr *)(skb_transport_header(skb) + 15199c70220bSArnaldo Carvalho de Melo sizeof(struct pimreghdr)); 15201da177e4SLinus Torvalds if (!MULTICAST(encap->daddr) || 15211da177e4SLinus Torvalds encap->tot_len == 0 || 15221da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 15231da177e4SLinus Torvalds goto drop; 15241da177e4SLinus Torvalds 15251da177e4SLinus Torvalds read_lock(&mrt_lock); 15261da177e4SLinus Torvalds if (reg_vif_num >= 0) 15271da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 15281da177e4SLinus Torvalds if (reg_dev) 15291da177e4SLinus Torvalds dev_hold(reg_dev); 15301da177e4SLinus Torvalds read_unlock(&mrt_lock); 15311da177e4SLinus Torvalds 15321da177e4SLinus Torvalds if (reg_dev == NULL) 15331da177e4SLinus Torvalds goto drop; 15341da177e4SLinus Torvalds 1535b0e380b1SArnaldo Carvalho de Melo skb->mac_header = skb->network_header; 15361da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 153731c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 15381da177e4SLinus Torvalds skb->dev = reg_dev; 15391da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 15401da177e4SLinus Torvalds skb->ip_summed = 0; 15411da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 15421da177e4SLinus Torvalds dst_release(skb->dst); 15432941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_bytes += skb->len; 15442941a486SPatrick McHardy ((struct net_device_stats*)netdev_priv(reg_dev))->rx_packets++; 15451da177e4SLinus Torvalds skb->dst = NULL; 15461da177e4SLinus Torvalds nf_reset(skb); 15471da177e4SLinus Torvalds netif_rx(skb); 15481da177e4SLinus Torvalds dev_put(reg_dev); 15491da177e4SLinus Torvalds return 0; 15501da177e4SLinus Torvalds drop: 15511da177e4SLinus Torvalds kfree_skb(skb); 15521da177e4SLinus Torvalds return 0; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds #endif 15551da177e4SLinus Torvalds 15561da177e4SLinus Torvalds static int 15571da177e4SLinus Torvalds ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm) 15581da177e4SLinus Torvalds { 15591da177e4SLinus Torvalds int ct; 15601da177e4SLinus Torvalds struct rtnexthop *nhp; 15611da177e4SLinus Torvalds struct net_device *dev = vif_table[c->mfc_parent].dev; 156227a884dcSArnaldo Carvalho de Melo u8 *b = skb_tail_pointer(skb); 15631da177e4SLinus Torvalds struct rtattr *mp_head; 15641da177e4SLinus Torvalds 15651da177e4SLinus Torvalds if (dev) 15661da177e4SLinus Torvalds RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex); 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds mp_head = (struct rtattr*)skb_put(skb, RTA_LENGTH(0)); 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { 15711da177e4SLinus Torvalds if (c->mfc_un.res.ttls[ct] < 255) { 15721da177e4SLinus Torvalds if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4)) 15731da177e4SLinus Torvalds goto rtattr_failure; 15741da177e4SLinus Torvalds nhp = (struct rtnexthop*)skb_put(skb, RTA_ALIGN(sizeof(*nhp))); 15751da177e4SLinus Torvalds nhp->rtnh_flags = 0; 15761da177e4SLinus Torvalds nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; 15771da177e4SLinus Torvalds nhp->rtnh_ifindex = vif_table[ct].dev->ifindex; 15781da177e4SLinus Torvalds nhp->rtnh_len = sizeof(*nhp); 15791da177e4SLinus Torvalds } 15801da177e4SLinus Torvalds } 15811da177e4SLinus Torvalds mp_head->rta_type = RTA_MULTIPATH; 158227a884dcSArnaldo Carvalho de Melo mp_head->rta_len = skb_tail_pointer(skb) - (u8 *)mp_head; 15831da177e4SLinus Torvalds rtm->rtm_type = RTN_MULTICAST; 15841da177e4SLinus Torvalds return 1; 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds rtattr_failure: 1587dc5fc579SArnaldo Carvalho de Melo nlmsg_trim(skb, b); 15881da177e4SLinus Torvalds return -EMSGSIZE; 15891da177e4SLinus Torvalds } 15901da177e4SLinus Torvalds 15911da177e4SLinus Torvalds int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait) 15921da177e4SLinus Torvalds { 15931da177e4SLinus Torvalds int err; 15941da177e4SLinus Torvalds struct mfc_cache *cache; 15951da177e4SLinus Torvalds struct rtable *rt = (struct rtable*)skb->dst; 15961da177e4SLinus Torvalds 15971da177e4SLinus Torvalds read_lock(&mrt_lock); 15981da177e4SLinus Torvalds cache = ipmr_cache_find(rt->rt_src, rt->rt_dst); 15991da177e4SLinus Torvalds 16001da177e4SLinus Torvalds if (cache==NULL) { 160172287490SAlexey Kuznetsov struct sk_buff *skb2; 1602eddc9ec5SArnaldo Carvalho de Melo struct iphdr *iph; 16031da177e4SLinus Torvalds struct net_device *dev; 16041da177e4SLinus Torvalds int vif; 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds if (nowait) { 16071da177e4SLinus Torvalds read_unlock(&mrt_lock); 16081da177e4SLinus Torvalds return -EAGAIN; 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds 16111da177e4SLinus Torvalds dev = skb->dev; 16121da177e4SLinus Torvalds if (dev == NULL || (vif = ipmr_find_vif(dev)) < 0) { 16131da177e4SLinus Torvalds read_unlock(&mrt_lock); 16141da177e4SLinus Torvalds return -ENODEV; 16151da177e4SLinus Torvalds } 161672287490SAlexey Kuznetsov skb2 = skb_clone(skb, GFP_ATOMIC); 161772287490SAlexey Kuznetsov if (!skb2) { 161872287490SAlexey Kuznetsov read_unlock(&mrt_lock); 161972287490SAlexey Kuznetsov return -ENOMEM; 162072287490SAlexey Kuznetsov } 162172287490SAlexey Kuznetsov 1622e2d1bca7SArnaldo Carvalho de Melo skb_push(skb2, sizeof(struct iphdr)); 1623e2d1bca7SArnaldo Carvalho de Melo skb_reset_network_header(skb2); 1624eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb2); 1625eddc9ec5SArnaldo Carvalho de Melo iph->ihl = sizeof(struct iphdr) >> 2; 1626eddc9ec5SArnaldo Carvalho de Melo iph->saddr = rt->rt_src; 1627eddc9ec5SArnaldo Carvalho de Melo iph->daddr = rt->rt_dst; 1628eddc9ec5SArnaldo Carvalho de Melo iph->version = 0; 162972287490SAlexey Kuznetsov err = ipmr_cache_unresolved(vif, skb2); 16301da177e4SLinus Torvalds read_unlock(&mrt_lock); 16311da177e4SLinus Torvalds return err; 16321da177e4SLinus Torvalds } 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) 16351da177e4SLinus Torvalds cache->mfc_flags |= MFC_NOTIFY; 16361da177e4SLinus Torvalds err = ipmr_fill_mroute(skb, cache, rtm); 16371da177e4SLinus Torvalds read_unlock(&mrt_lock); 16381da177e4SLinus Torvalds return err; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 16421da177e4SLinus Torvalds /* 16431da177e4SLinus Torvalds * The /proc interfaces to multicast routing /proc/ip_mr_cache /proc/ip_mr_vif 16441da177e4SLinus Torvalds */ 16451da177e4SLinus Torvalds struct ipmr_vif_iter { 16461da177e4SLinus Torvalds int ct; 16471da177e4SLinus Torvalds }; 16481da177e4SLinus Torvalds 16491da177e4SLinus Torvalds static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter, 16501da177e4SLinus Torvalds loff_t pos) 16511da177e4SLinus Torvalds { 16521da177e4SLinus Torvalds for (iter->ct = 0; iter->ct < maxvif; ++iter->ct) { 16531da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16541da177e4SLinus Torvalds continue; 16551da177e4SLinus Torvalds if (pos-- == 0) 16561da177e4SLinus Torvalds return &vif_table[iter->ct]; 16571da177e4SLinus Torvalds } 16581da177e4SLinus Torvalds return NULL; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) 16621da177e4SLinus Torvalds { 16631da177e4SLinus Torvalds read_lock(&mrt_lock); 16641da177e4SLinus Torvalds return *pos ? ipmr_vif_seq_idx(seq->private, *pos - 1) 16651da177e4SLinus Torvalds : SEQ_START_TOKEN; 16661da177e4SLinus Torvalds } 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) 16691da177e4SLinus Torvalds { 16701da177e4SLinus Torvalds struct ipmr_vif_iter *iter = seq->private; 16711da177e4SLinus Torvalds 16721da177e4SLinus Torvalds ++*pos; 16731da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 16741da177e4SLinus Torvalds return ipmr_vif_seq_idx(iter, 0); 16751da177e4SLinus Torvalds 16761da177e4SLinus Torvalds while (++iter->ct < maxvif) { 16771da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16781da177e4SLinus Torvalds continue; 16791da177e4SLinus Torvalds return &vif_table[iter->ct]; 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds return NULL; 16821da177e4SLinus Torvalds } 16831da177e4SLinus Torvalds 16841da177e4SLinus Torvalds static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) 16851da177e4SLinus Torvalds { 16861da177e4SLinus Torvalds read_unlock(&mrt_lock); 16871da177e4SLinus Torvalds } 16881da177e4SLinus Torvalds 16891da177e4SLinus Torvalds static int ipmr_vif_seq_show(struct seq_file *seq, void *v) 16901da177e4SLinus Torvalds { 16911da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 16921da177e4SLinus Torvalds seq_puts(seq, 16931da177e4SLinus Torvalds "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); 16941da177e4SLinus Torvalds } else { 16951da177e4SLinus Torvalds const struct vif_device *vif = v; 16961da177e4SLinus Torvalds const char *name = vif->dev ? vif->dev->name : "none"; 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds seq_printf(seq, 16991da177e4SLinus Torvalds "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", 17001da177e4SLinus Torvalds vif - vif_table, 17011da177e4SLinus Torvalds name, vif->bytes_in, vif->pkt_in, 17021da177e4SLinus Torvalds vif->bytes_out, vif->pkt_out, 17031da177e4SLinus Torvalds vif->flags, vif->local, vif->remote); 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds return 0; 17061da177e4SLinus Torvalds } 17071da177e4SLinus Torvalds 1708f690808eSStephen Hemminger static const struct seq_operations ipmr_vif_seq_ops = { 17091da177e4SLinus Torvalds .start = ipmr_vif_seq_start, 17101da177e4SLinus Torvalds .next = ipmr_vif_seq_next, 17111da177e4SLinus Torvalds .stop = ipmr_vif_seq_stop, 17121da177e4SLinus Torvalds .show = ipmr_vif_seq_show, 17131da177e4SLinus Torvalds }; 17141da177e4SLinus Torvalds 17151da177e4SLinus Torvalds static int ipmr_vif_open(struct inode *inode, struct file *file) 17161da177e4SLinus Torvalds { 1717cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_vif_seq_ops, 1718cf7732e4SPavel Emelyanov sizeof(struct ipmr_vif_iter)); 17191da177e4SLinus Torvalds } 17201da177e4SLinus Torvalds 17219a32144eSArjan van de Ven static const struct file_operations ipmr_vif_fops = { 17221da177e4SLinus Torvalds .owner = THIS_MODULE, 17231da177e4SLinus Torvalds .open = ipmr_vif_open, 17241da177e4SLinus Torvalds .read = seq_read, 17251da177e4SLinus Torvalds .llseek = seq_lseek, 17261da177e4SLinus Torvalds .release = seq_release_private, 17271da177e4SLinus Torvalds }; 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds struct ipmr_mfc_iter { 17301da177e4SLinus Torvalds struct mfc_cache **cache; 17311da177e4SLinus Torvalds int ct; 17321da177e4SLinus Torvalds }; 17331da177e4SLinus Torvalds 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos) 17361da177e4SLinus Torvalds { 17371da177e4SLinus Torvalds struct mfc_cache *mfc; 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds it->cache = mfc_cache_array; 17401da177e4SLinus Torvalds read_lock(&mrt_lock); 17411da177e4SLinus Torvalds for (it->ct = 0; it->ct < MFC_LINES; it->ct++) 17421da177e4SLinus Torvalds for (mfc = mfc_cache_array[it->ct]; mfc; mfc = mfc->next) 17431da177e4SLinus Torvalds if (pos-- == 0) 17441da177e4SLinus Torvalds return mfc; 17451da177e4SLinus Torvalds read_unlock(&mrt_lock); 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17481da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17491da177e4SLinus Torvalds for (mfc = mfc_unres_queue; mfc; mfc = mfc->next) 17501da177e4SLinus Torvalds if (pos-- == 0) 17511da177e4SLinus Torvalds return mfc; 17521da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 17531da177e4SLinus Torvalds 17541da177e4SLinus Torvalds it->cache = NULL; 17551da177e4SLinus Torvalds return NULL; 17561da177e4SLinus Torvalds } 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds 17591da177e4SLinus Torvalds static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) 17601da177e4SLinus Torvalds { 17611da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17621da177e4SLinus Torvalds it->cache = NULL; 17631da177e4SLinus Torvalds it->ct = 0; 17641da177e4SLinus Torvalds return *pos ? ipmr_mfc_seq_idx(seq->private, *pos - 1) 17651da177e4SLinus Torvalds : SEQ_START_TOKEN; 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds 17681da177e4SLinus Torvalds static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) 17691da177e4SLinus Torvalds { 17701da177e4SLinus Torvalds struct mfc_cache *mfc = v; 17711da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds ++*pos; 17741da177e4SLinus Torvalds 17751da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 17761da177e4SLinus Torvalds return ipmr_mfc_seq_idx(seq->private, 0); 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds if (mfc->next) 17791da177e4SLinus Torvalds return mfc->next; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 17821da177e4SLinus Torvalds goto end_of_list; 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds BUG_ON(it->cache != mfc_cache_array); 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds while (++it->ct < MFC_LINES) { 17871da177e4SLinus Torvalds mfc = mfc_cache_array[it->ct]; 17881da177e4SLinus Torvalds if (mfc) 17891da177e4SLinus Torvalds return mfc; 17901da177e4SLinus Torvalds } 17911da177e4SLinus Torvalds 17921da177e4SLinus Torvalds /* exhausted cache_array, show unresolved */ 17931da177e4SLinus Torvalds read_unlock(&mrt_lock); 17941da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17951da177e4SLinus Torvalds it->ct = 0; 17961da177e4SLinus Torvalds 17971da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17981da177e4SLinus Torvalds mfc = mfc_unres_queue; 17991da177e4SLinus Torvalds if (mfc) 18001da177e4SLinus Torvalds return mfc; 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds end_of_list: 18031da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18041da177e4SLinus Torvalds it->cache = NULL; 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds return NULL; 18071da177e4SLinus Torvalds } 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) 18101da177e4SLinus Torvalds { 18111da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 18141da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18151da177e4SLinus Torvalds else if (it->cache == mfc_cache_array) 18161da177e4SLinus Torvalds read_unlock(&mrt_lock); 18171da177e4SLinus Torvalds } 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) 18201da177e4SLinus Torvalds { 18211da177e4SLinus Torvalds int n; 18221da177e4SLinus Torvalds 18231da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 18241da177e4SLinus Torvalds seq_puts(seq, 18251da177e4SLinus Torvalds "Group Origin Iif Pkts Bytes Wrong Oifs\n"); 18261da177e4SLinus Torvalds } else { 18271da177e4SLinus Torvalds const struct mfc_cache *mfc = v; 18281da177e4SLinus Torvalds const struct ipmr_mfc_iter *it = seq->private; 18291da177e4SLinus Torvalds 18301da177e4SLinus Torvalds seq_printf(seq, "%08lX %08lX %-3d %8ld %8ld %8ld", 18311da177e4SLinus Torvalds (unsigned long) mfc->mfc_mcastgrp, 18321da177e4SLinus Torvalds (unsigned long) mfc->mfc_origin, 18331da177e4SLinus Torvalds mfc->mfc_parent, 18341da177e4SLinus Torvalds mfc->mfc_un.res.pkt, 18351da177e4SLinus Torvalds mfc->mfc_un.res.bytes, 18361da177e4SLinus Torvalds mfc->mfc_un.res.wrong_if); 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds if (it->cache != &mfc_unres_queue) { 18391da177e4SLinus Torvalds for (n = mfc->mfc_un.res.minvif; 18401da177e4SLinus Torvalds n < mfc->mfc_un.res.maxvif; n++ ) { 18411da177e4SLinus Torvalds if (VIF_EXISTS(n) 18421da177e4SLinus Torvalds && mfc->mfc_un.res.ttls[n] < 255) 18431da177e4SLinus Torvalds seq_printf(seq, 18441da177e4SLinus Torvalds " %2d:%-3d", 18451da177e4SLinus Torvalds n, mfc->mfc_un.res.ttls[n]); 18461da177e4SLinus Torvalds } 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds seq_putc(seq, '\n'); 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds return 0; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds 1853f690808eSStephen Hemminger static const struct seq_operations ipmr_mfc_seq_ops = { 18541da177e4SLinus Torvalds .start = ipmr_mfc_seq_start, 18551da177e4SLinus Torvalds .next = ipmr_mfc_seq_next, 18561da177e4SLinus Torvalds .stop = ipmr_mfc_seq_stop, 18571da177e4SLinus Torvalds .show = ipmr_mfc_seq_show, 18581da177e4SLinus Torvalds }; 18591da177e4SLinus Torvalds 18601da177e4SLinus Torvalds static int ipmr_mfc_open(struct inode *inode, struct file *file) 18611da177e4SLinus Torvalds { 1862cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_mfc_seq_ops, 1863cf7732e4SPavel Emelyanov sizeof(struct ipmr_mfc_iter)); 18641da177e4SLinus Torvalds } 18651da177e4SLinus Torvalds 18669a32144eSArjan van de Ven static const struct file_operations ipmr_mfc_fops = { 18671da177e4SLinus Torvalds .owner = THIS_MODULE, 18681da177e4SLinus Torvalds .open = ipmr_mfc_open, 18691da177e4SLinus Torvalds .read = seq_read, 18701da177e4SLinus Torvalds .llseek = seq_lseek, 18711da177e4SLinus Torvalds .release = seq_release_private, 18721da177e4SLinus Torvalds }; 18731da177e4SLinus Torvalds #endif 18741da177e4SLinus Torvalds 18751da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 18761da177e4SLinus Torvalds static struct net_protocol pim_protocol = { 18771da177e4SLinus Torvalds .handler = pim_rcv, 18781da177e4SLinus Torvalds }; 18791da177e4SLinus Torvalds #endif 18801da177e4SLinus Torvalds 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds /* 18831da177e4SLinus Torvalds * Setup for IP multicast routing 18841da177e4SLinus Torvalds */ 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds void __init ip_mr_init(void) 18871da177e4SLinus Torvalds { 18881da177e4SLinus Torvalds mrt_cachep = kmem_cache_create("ip_mrt_cache", 18891da177e4SLinus Torvalds sizeof(struct mfc_cache), 1890e5d679f3SAlexey Dobriyan 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, 189120c2df83SPaul Mundt NULL); 1892b24b8a24SPavel Emelyanov setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0); 18931da177e4SLinus Torvalds register_netdevice_notifier(&ip_mr_notifier); 18941da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 1895457c4cbcSEric W. Biederman proc_net_fops_create(&init_net, "ip_mr_vif", 0, &ipmr_vif_fops); 1896457c4cbcSEric W. Biederman proc_net_fops_create(&init_net, "ip_mr_cache", 0, &ipmr_mfc_fops); 18971da177e4SLinus Torvalds #endif 18981da177e4SLinus Torvalds } 1899