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); 144ba93ef74SStephen Hemminger ifr.ifr_ifru.ifru_data = (__force void __user *)&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); 184*cf3677aeSPavel Emelyanov dev->stats.tx_bytes += skb->len; 185*cf3677aeSPavel Emelyanov dev->stats.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 void reg_vif_setup(struct net_device *dev) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds dev->type = ARPHRD_PIMREG; 19546f25dffSKris Katterjohn dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; 1961da177e4SLinus Torvalds dev->flags = IFF_NOARP; 1971da177e4SLinus Torvalds dev->hard_start_xmit = reg_vif_xmit; 1981da177e4SLinus Torvalds dev->destructor = free_netdev; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds static struct net_device *ipmr_reg_vif(void) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds struct net_device *dev; 2041da177e4SLinus Torvalds struct in_device *in_dev; 2051da177e4SLinus Torvalds 206*cf3677aeSPavel Emelyanov dev = alloc_netdev(0, "pimreg", reg_vif_setup); 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds if (dev == NULL) 2091da177e4SLinus Torvalds return NULL; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds if (register_netdevice(dev)) { 2121da177e4SLinus Torvalds free_netdev(dev); 2131da177e4SLinus Torvalds return NULL; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds dev->iflink = 0; 2161da177e4SLinus Torvalds 21771e27da9SHerbert Xu rcu_read_lock(); 21871e27da9SHerbert Xu if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { 21971e27da9SHerbert Xu rcu_read_unlock(); 2201da177e4SLinus Torvalds goto failure; 22171e27da9SHerbert Xu } 2221da177e4SLinus Torvalds 22371e27da9SHerbert Xu ipv4_devconf_setall(in_dev); 22471e27da9SHerbert Xu IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; 22571e27da9SHerbert Xu rcu_read_unlock(); 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds if (dev_open(dev)) 2281da177e4SLinus Torvalds goto failure; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds return dev; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds failure: 2331da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 2341da177e4SLinus Torvalds rtnl_unlock(); 2351da177e4SLinus Torvalds rtnl_lock(); 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds unregister_netdevice(dev); 2381da177e4SLinus Torvalds return NULL; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds #endif 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds * Delete a VIF entry 2441da177e4SLinus Torvalds */ 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds static int vif_delete(int vifi) 2471da177e4SLinus Torvalds { 2481da177e4SLinus Torvalds struct vif_device *v; 2491da177e4SLinus Torvalds struct net_device *dev; 2501da177e4SLinus Torvalds struct in_device *in_dev; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds if (vifi < 0 || vifi >= maxvif) 2531da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds v = &vif_table[vifi]; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 2581da177e4SLinus Torvalds dev = v->dev; 2591da177e4SLinus Torvalds v->dev = NULL; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds if (!dev) { 2621da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2631da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 2671da177e4SLinus Torvalds if (vifi == reg_vif_num) 2681da177e4SLinus Torvalds reg_vif_num = -1; 2691da177e4SLinus Torvalds #endif 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds if (vifi+1 == maxvif) { 2721da177e4SLinus Torvalds int tmp; 2731da177e4SLinus Torvalds for (tmp=vifi-1; tmp>=0; tmp--) { 2741da177e4SLinus Torvalds if (VIF_EXISTS(tmp)) 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds maxvif = tmp+1; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds dev_set_allmulti(dev, -1); 2831da177e4SLinus Torvalds 284e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { 28542f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; 2861da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 2901da177e4SLinus Torvalds unregister_netdevice(dev); 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds dev_put(dev); 2931da177e4SLinus Torvalds return 0; 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds /* Destroy an unresolved cache entry, killing queued skbs 2971da177e4SLinus Torvalds and reporting error to netlink readers. 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds 3001da177e4SLinus Torvalds static void ipmr_destroy_unres(struct mfc_cache *c) 3011da177e4SLinus Torvalds { 3021da177e4SLinus Torvalds struct sk_buff *skb; 3039ef1d4c7SPatrick McHardy struct nlmsgerr *e; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds atomic_dec(&cache_resolve_queue_len); 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds while ((skb=skb_dequeue(&c->mfc_un.unres.unresolved))) { 308eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 3091da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 3101da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 3111da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 3121da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 3139ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 3149ef1d4c7SPatrick McHardy e->error = -ETIMEDOUT; 3159ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 3162942e900SThomas Graf 31797c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 3181da177e4SLinus Torvalds } else 3191da177e4SLinus Torvalds kfree_skb(skb); 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* Single timer process for all the unresolved queue. */ 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds static void ipmr_expire_process(unsigned long dummy) 3291da177e4SLinus Torvalds { 3301da177e4SLinus Torvalds unsigned long now; 3311da177e4SLinus Torvalds unsigned long expires; 3321da177e4SLinus Torvalds struct mfc_cache *c, **cp; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds if (!spin_trylock(&mfc_unres_lock)) { 3351da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies+HZ/10); 3361da177e4SLinus Torvalds return; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) == 0) 3401da177e4SLinus Torvalds goto out; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds now = jiffies; 3431da177e4SLinus Torvalds expires = 10*HZ; 3441da177e4SLinus Torvalds cp = &mfc_unres_queue; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds while ((c=*cp) != NULL) { 3471da177e4SLinus Torvalds if (time_after(c->mfc_un.unres.expires, now)) { 3481da177e4SLinus Torvalds unsigned long interval = c->mfc_un.unres.expires - now; 3491da177e4SLinus Torvalds if (interval < expires) 3501da177e4SLinus Torvalds expires = interval; 3511da177e4SLinus Torvalds cp = &c->next; 3521da177e4SLinus Torvalds continue; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds *cp = c->next; 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds ipmr_destroy_unres(c); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)) 3611da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies + expires); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds out: 3641da177e4SLinus Torvalds spin_unlock(&mfc_unres_lock); 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds /* Fill oifs list. It is called under write locked mrt_lock. */ 3681da177e4SLinus Torvalds 369d1b04c08SBaruch Even static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds int vifi; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds cache->mfc_un.res.minvif = MAXVIFS; 3741da177e4SLinus Torvalds cache->mfc_un.res.maxvif = 0; 3751da177e4SLinus Torvalds memset(cache->mfc_un.res.ttls, 255, MAXVIFS); 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds for (vifi=0; vifi<maxvif; vifi++) { 3781da177e4SLinus Torvalds if (VIF_EXISTS(vifi) && ttls[vifi] && ttls[vifi] < 255) { 3791da177e4SLinus Torvalds cache->mfc_un.res.ttls[vifi] = ttls[vifi]; 3801da177e4SLinus Torvalds if (cache->mfc_un.res.minvif > vifi) 3811da177e4SLinus Torvalds cache->mfc_un.res.minvif = vifi; 3821da177e4SLinus Torvalds if (cache->mfc_un.res.maxvif <= vifi) 3831da177e4SLinus Torvalds cache->mfc_un.res.maxvif = vifi + 1; 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds static int vif_add(struct vifctl *vifc, int mrtsock) 3891da177e4SLinus Torvalds { 3901da177e4SLinus Torvalds int vifi = vifc->vifc_vifi; 3911da177e4SLinus Torvalds struct vif_device *v = &vif_table[vifi]; 3921da177e4SLinus Torvalds struct net_device *dev; 3931da177e4SLinus Torvalds struct in_device *in_dev; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds /* Is vif busy ? */ 3961da177e4SLinus Torvalds if (VIF_EXISTS(vifi)) 3971da177e4SLinus Torvalds return -EADDRINUSE; 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds switch (vifc->vifc_flags) { 4001da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4011da177e4SLinus Torvalds case VIFF_REGISTER: 4021da177e4SLinus Torvalds /* 4031da177e4SLinus Torvalds * Special Purpose VIF in PIM 4041da177e4SLinus Torvalds * All the packets will be sent to the daemon 4051da177e4SLinus Torvalds */ 4061da177e4SLinus Torvalds if (reg_vif_num >= 0) 4071da177e4SLinus Torvalds return -EADDRINUSE; 4081da177e4SLinus Torvalds dev = ipmr_reg_vif(); 4091da177e4SLinus Torvalds if (!dev) 4101da177e4SLinus Torvalds return -ENOBUFS; 4111da177e4SLinus Torvalds break; 4121da177e4SLinus Torvalds #endif 4131da177e4SLinus Torvalds case VIFF_TUNNEL: 4141da177e4SLinus Torvalds dev = ipmr_new_tunnel(vifc); 4151da177e4SLinus Torvalds if (!dev) 4161da177e4SLinus Torvalds return -ENOBUFS; 4171da177e4SLinus Torvalds break; 4181da177e4SLinus Torvalds case 0: 4191ab35276SDenis V. Lunev dev = ip_dev_find(&init_net, vifc->vifc_lcl_addr.s_addr); 4201da177e4SLinus Torvalds if (!dev) 4211da177e4SLinus Torvalds return -EADDRNOTAVAIL; 42215333061SStephen Hemminger dev_put(dev); 4231da177e4SLinus Torvalds break; 4241da177e4SLinus Torvalds default: 4251da177e4SLinus Torvalds return -EINVAL; 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 428e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) 4291da177e4SLinus Torvalds return -EADDRNOTAVAIL; 43042f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; 4311da177e4SLinus Torvalds dev_set_allmulti(dev, +1); 4321da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds /* 4351da177e4SLinus Torvalds * Fill in the VIF structures 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds v->rate_limit=vifc->vifc_rate_limit; 4381da177e4SLinus Torvalds v->local=vifc->vifc_lcl_addr.s_addr; 4391da177e4SLinus Torvalds v->remote=vifc->vifc_rmt_addr.s_addr; 4401da177e4SLinus Torvalds v->flags=vifc->vifc_flags; 4411da177e4SLinus Torvalds if (!mrtsock) 4421da177e4SLinus Torvalds v->flags |= VIFF_STATIC; 4431da177e4SLinus Torvalds v->threshold=vifc->vifc_threshold; 4441da177e4SLinus Torvalds v->bytes_in = 0; 4451da177e4SLinus Torvalds v->bytes_out = 0; 4461da177e4SLinus Torvalds v->pkt_in = 0; 4471da177e4SLinus Torvalds v->pkt_out = 0; 4481da177e4SLinus Torvalds v->link = dev->ifindex; 4491da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 4501da177e4SLinus Torvalds v->link = dev->iflink; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* And finish update writing critical data */ 4531da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 4541da177e4SLinus Torvalds dev_hold(dev); 4551da177e4SLinus Torvalds v->dev=dev; 4561da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4571da177e4SLinus Torvalds if (v->flags&VIFF_REGISTER) 4581da177e4SLinus Torvalds reg_vif_num = vifi; 4591da177e4SLinus Torvalds #endif 4601da177e4SLinus Torvalds if (vifi+1 > maxvif) 4611da177e4SLinus Torvalds maxvif = vifi+1; 4621da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 4631da177e4SLinus Torvalds return 0; 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 466114c7844SAl Viro static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds int line=MFC_HASH(mcastgrp,origin); 4691da177e4SLinus Torvalds struct mfc_cache *c; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds for (c=mfc_cache_array[line]; c; c = c->next) { 4721da177e4SLinus Torvalds if (c->mfc_origin==origin && c->mfc_mcastgrp==mcastgrp) 4731da177e4SLinus Torvalds break; 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds return c; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds /* 4791da177e4SLinus Torvalds * Allocate a multicast cache entry 4801da177e4SLinus Torvalds */ 4811da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc(void) 4821da177e4SLinus Torvalds { 483c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); 4841da177e4SLinus Torvalds if (c==NULL) 4851da177e4SLinus Torvalds return NULL; 4861da177e4SLinus Torvalds c->mfc_un.res.minvif = MAXVIFS; 4871da177e4SLinus Torvalds return c; 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds static struct mfc_cache *ipmr_cache_alloc_unres(void) 4911da177e4SLinus Torvalds { 492c3762229SRobert P. J. Day struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); 4931da177e4SLinus Torvalds if (c==NULL) 4941da177e4SLinus Torvalds return NULL; 4951da177e4SLinus Torvalds skb_queue_head_init(&c->mfc_un.unres.unresolved); 4961da177e4SLinus Torvalds c->mfc_un.unres.expires = jiffies + 10*HZ; 4971da177e4SLinus Torvalds return c; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds /* 5011da177e4SLinus Torvalds * A cache entry has gone into a resolved state from queued 5021da177e4SLinus Torvalds */ 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) 5051da177e4SLinus Torvalds { 5061da177e4SLinus Torvalds struct sk_buff *skb; 5079ef1d4c7SPatrick McHardy struct nlmsgerr *e; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds /* 5101da177e4SLinus Torvalds * Play the pending entries through our router 5111da177e4SLinus Torvalds */ 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds while ((skb=__skb_dequeue(&uc->mfc_un.unres.unresolved))) { 514eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 5151da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds if (ipmr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) { 51827a884dcSArnaldo Carvalho de Melo nlh->nlmsg_len = (skb_tail_pointer(skb) - 51927a884dcSArnaldo Carvalho de Melo (u8 *)nlh); 5201da177e4SLinus Torvalds } else { 5211da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 5221da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 5231da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 5249ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 5259ef1d4c7SPatrick McHardy e->error = -EMSGSIZE; 5269ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 5271da177e4SLinus Torvalds } 5282942e900SThomas Graf 52997c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 5301da177e4SLinus Torvalds } else 5311da177e4SLinus Torvalds ip_mr_forward(skb, c, 0); 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds /* 5361da177e4SLinus Torvalds * Bounce a cache query up to mrouted. We could use netlink for this but mrouted 5371da177e4SLinus Torvalds * expects the following bizarre scheme. 5381da177e4SLinus Torvalds * 5391da177e4SLinus Torvalds * Called under mrt_lock. 5401da177e4SLinus Torvalds */ 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert) 5431da177e4SLinus Torvalds { 5441da177e4SLinus Torvalds struct sk_buff *skb; 545c9bdd4b5SArnaldo Carvalho de Melo const int ihl = ip_hdrlen(pkt); 5461da177e4SLinus Torvalds struct igmphdr *igmp; 5471da177e4SLinus Torvalds struct igmpmsg *msg; 5481da177e4SLinus Torvalds int ret; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5511da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) 5521da177e4SLinus Torvalds skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); 5531da177e4SLinus Torvalds else 5541da177e4SLinus Torvalds #endif 5551da177e4SLinus Torvalds skb = alloc_skb(128, GFP_ATOMIC); 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds if (!skb) 5581da177e4SLinus Torvalds return -ENOBUFS; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5611da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) { 5621da177e4SLinus Torvalds /* Ugly, but we have no choice with this interface. 5631da177e4SLinus Torvalds Duplicate old header, fix ihl, length etc. 5641da177e4SLinus Torvalds And all this only to mangle msg->im_msgtype and 5651da177e4SLinus Torvalds to set msg->im_mbz to "mbz" :-) 5661da177e4SLinus Torvalds */ 567878c8145SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 568878c8145SArnaldo Carvalho de Melo skb_reset_network_header(skb); 569badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 5700272ffc4SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 571d56f90a7SArnaldo Carvalho de Melo memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); 5721da177e4SLinus Torvalds msg->im_msgtype = IGMPMSG_WHOLEPKT; 5731da177e4SLinus Torvalds msg->im_mbz = 0; 5741da177e4SLinus Torvalds msg->im_vif = reg_vif_num; 575eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; 576eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + 577eddc9ec5SArnaldo Carvalho de Melo sizeof(struct iphdr)); 5781da177e4SLinus Torvalds } else 5791da177e4SLinus Torvalds #endif 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds /* 5831da177e4SLinus Torvalds * Copy the IP header 5841da177e4SLinus Torvalds */ 5851da177e4SLinus Torvalds 58627a884dcSArnaldo Carvalho de Melo skb->network_header = skb->tail; 587ddc7b8e3SArnaldo Carvalho de Melo skb_put(skb, ihl); 58827d7ff46SArnaldo Carvalho de Melo skb_copy_to_linear_data(skb, pkt->data, ihl); 589eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->protocol = 0; /* Flag to the kernel this is a route add */ 590eddc9ec5SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 5911da177e4SLinus Torvalds msg->im_vif = vifi; 5921da177e4SLinus Torvalds skb->dst = dst_clone(pkt->dst); 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds /* 5951da177e4SLinus Torvalds * Add our header 5961da177e4SLinus Torvalds */ 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds igmp=(struct igmphdr *)skb_put(skb,sizeof(struct igmphdr)); 5991da177e4SLinus Torvalds igmp->type = 6001da177e4SLinus Torvalds msg->im_msgtype = assert; 6011da177e4SLinus Torvalds igmp->code = 0; 602eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ 603b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds if (mroute_socket == NULL) { 6071da177e4SLinus Torvalds kfree_skb(skb); 6081da177e4SLinus Torvalds return -EINVAL; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds /* 6121da177e4SLinus Torvalds * Deliver to mrouted 6131da177e4SLinus Torvalds */ 6141da177e4SLinus Torvalds if ((ret=sock_queue_rcv_skb(mroute_socket,skb))<0) { 6151da177e4SLinus Torvalds if (net_ratelimit()) 6161da177e4SLinus Torvalds printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n"); 6171da177e4SLinus Torvalds kfree_skb(skb); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds return ret; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds /* 6241da177e4SLinus Torvalds * Queue a packet for resolution. It gets locked cache entry! 6251da177e4SLinus Torvalds */ 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds static int 6281da177e4SLinus Torvalds ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds int err; 6311da177e4SLinus Torvalds struct mfc_cache *c; 632eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 6351da177e4SLinus Torvalds for (c=mfc_unres_queue; c; c=c->next) { 636eddc9ec5SArnaldo Carvalho de Melo if (c->mfc_mcastgrp == iph->daddr && 637eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin == iph->saddr) 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds if (c == NULL) { 6421da177e4SLinus Torvalds /* 6431da177e4SLinus Torvalds * Create a new entry if allowable 6441da177e4SLinus Torvalds */ 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)>=10 || 6471da177e4SLinus Torvalds (c=ipmr_cache_alloc_unres())==NULL) { 6481da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds kfree_skb(skb); 6511da177e4SLinus Torvalds return -ENOBUFS; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds /* 6551da177e4SLinus Torvalds * Fill in the new cache entry 6561da177e4SLinus Torvalds */ 6571da177e4SLinus Torvalds c->mfc_parent = -1; 658eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin = iph->saddr; 659eddc9ec5SArnaldo Carvalho de Melo c->mfc_mcastgrp = iph->daddr; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds /* 6621da177e4SLinus Torvalds * Reflect first query at mrouted. 6631da177e4SLinus Torvalds */ 6641da177e4SLinus Torvalds if ((err = ipmr_cache_report(skb, vifi, IGMPMSG_NOCACHE))<0) { 6651da177e4SLinus Torvalds /* If the report failed throw the cache entry 6661da177e4SLinus Torvalds out - Brad Parker 6671da177e4SLinus Torvalds */ 6681da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 6711da177e4SLinus Torvalds kfree_skb(skb); 6721da177e4SLinus Torvalds return err; 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds atomic_inc(&cache_resolve_queue_len); 6761da177e4SLinus Torvalds c->next = mfc_unres_queue; 6771da177e4SLinus Torvalds mfc_unres_queue = c; 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires); 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /* 6831da177e4SLinus Torvalds * See if we can append the packet 6841da177e4SLinus Torvalds */ 6851da177e4SLinus Torvalds if (c->mfc_un.unres.unresolved.qlen>3) { 6861da177e4SLinus Torvalds kfree_skb(skb); 6871da177e4SLinus Torvalds err = -ENOBUFS; 6881da177e4SLinus Torvalds } else { 6891da177e4SLinus Torvalds skb_queue_tail(&c->mfc_un.unres.unresolved,skb); 6901da177e4SLinus Torvalds err = 0; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 6941da177e4SLinus Torvalds return err; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /* 6981da177e4SLinus Torvalds * MFC cache manipulation by user space mroute daemon 6991da177e4SLinus Torvalds */ 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds static int ipmr_mfc_delete(struct mfcctl *mfc) 7021da177e4SLinus Torvalds { 7031da177e4SLinus Torvalds int line; 7041da177e4SLinus Torvalds struct mfc_cache *c, **cp; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7091da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7101da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) { 7111da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7121da177e4SLinus Torvalds *cp = c->next; 7131da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 7161da177e4SLinus Torvalds return 0; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds return -ENOENT; 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock) 7231da177e4SLinus Torvalds { 7241da177e4SLinus Torvalds int line; 7251da177e4SLinus Torvalds struct mfc_cache *uc, *c, **cp; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) { 7301da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7311da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) 7321da177e4SLinus Torvalds break; 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds if (c != NULL) { 7361da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7371da177e4SLinus Torvalds c->mfc_parent = mfc->mfcc_parent; 738d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7391da177e4SLinus Torvalds if (!mrtsock) 7401da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7411da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7421da177e4SLinus Torvalds return 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 745f97c1e0cSJoe Perches if (!ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) 7461da177e4SLinus Torvalds return -EINVAL; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds c=ipmr_cache_alloc(); 7491da177e4SLinus Torvalds if (c==NULL) 7501da177e4SLinus Torvalds return -ENOMEM; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds c->mfc_origin=mfc->mfcc_origin.s_addr; 7531da177e4SLinus Torvalds c->mfc_mcastgrp=mfc->mfcc_mcastgrp.s_addr; 7541da177e4SLinus Torvalds c->mfc_parent=mfc->mfcc_parent; 755d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7561da177e4SLinus Torvalds if (!mrtsock) 7571da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7601da177e4SLinus Torvalds c->next = mfc_cache_array[line]; 7611da177e4SLinus Torvalds mfc_cache_array[line] = c; 7621da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds /* 7651da177e4SLinus Torvalds * Check to see if we resolved a queued list. If so we 7661da177e4SLinus Torvalds * need to send on the frames and tidy up. 7671da177e4SLinus Torvalds */ 7681da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 7691da177e4SLinus Torvalds for (cp = &mfc_unres_queue; (uc=*cp) != NULL; 7701da177e4SLinus Torvalds cp = &uc->next) { 7711da177e4SLinus Torvalds if (uc->mfc_origin == c->mfc_origin && 7721da177e4SLinus Torvalds uc->mfc_mcastgrp == c->mfc_mcastgrp) { 7731da177e4SLinus Torvalds *cp = uc->next; 7741da177e4SLinus Torvalds if (atomic_dec_and_test(&cache_resolve_queue_len)) 7751da177e4SLinus Torvalds del_timer(&ipmr_expire_timer); 7761da177e4SLinus Torvalds break; 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds if (uc) { 7821da177e4SLinus Torvalds ipmr_cache_resolve(uc, c); 7831da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, uc); 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds return 0; 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds /* 7891da177e4SLinus Torvalds * Close the multicast socket, and clear the vif tables etc 7901da177e4SLinus Torvalds */ 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds static void mroute_clean_tables(struct sock *sk) 7931da177e4SLinus Torvalds { 7941da177e4SLinus Torvalds int i; 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds /* 7971da177e4SLinus Torvalds * Shut down all active vif entries 7981da177e4SLinus Torvalds */ 7991da177e4SLinus Torvalds for (i=0; i<maxvif; i++) { 8001da177e4SLinus Torvalds if (!(vif_table[i].flags&VIFF_STATIC)) 8011da177e4SLinus Torvalds vif_delete(i); 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds /* 8051da177e4SLinus Torvalds * Wipe the cache 8061da177e4SLinus Torvalds */ 8071da177e4SLinus Torvalds for (i=0;i<MFC_LINES;i++) { 8081da177e4SLinus Torvalds struct mfc_cache *c, **cp; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds cp = &mfc_cache_array[i]; 8111da177e4SLinus Torvalds while ((c = *cp) != NULL) { 8121da177e4SLinus Torvalds if (c->mfc_flags&MFC_STATIC) { 8131da177e4SLinus Torvalds cp = &c->next; 8141da177e4SLinus Torvalds continue; 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8171da177e4SLinus Torvalds *cp = c->next; 8181da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds kmem_cache_free(mrt_cachep, c); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) != 0) { 8251da177e4SLinus Torvalds struct mfc_cache *c; 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8281da177e4SLinus Torvalds while (mfc_unres_queue != NULL) { 8291da177e4SLinus Torvalds c = mfc_unres_queue; 8301da177e4SLinus Torvalds mfc_unres_queue = c->next; 8311da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds ipmr_destroy_unres(c); 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds static void mrtsock_destruct(struct sock *sk) 8421da177e4SLinus Torvalds { 8431da177e4SLinus Torvalds rtnl_lock(); 8441da177e4SLinus Torvalds if (sk == mroute_socket) { 8453b1e0a65SYOSHIFUJI Hideaki IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)--; 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8481da177e4SLinus Torvalds mroute_socket=NULL; 8491da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds mroute_clean_tables(sk); 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds rtnl_unlock(); 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds /* 8571da177e4SLinus Torvalds * Socket options and virtual interface manipulation. The whole 8581da177e4SLinus Torvalds * virtual interface system is a complete heap, but unfortunately 8591da177e4SLinus Torvalds * that's how BSD mrouted happens to think. Maybe one day with a proper 8601da177e4SLinus Torvalds * MOSPF/PIM router set up we can clean this up. 8611da177e4SLinus Torvalds */ 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int optlen) 8641da177e4SLinus Torvalds { 8651da177e4SLinus Torvalds int ret; 8661da177e4SLinus Torvalds struct vifctl vif; 8671da177e4SLinus Torvalds struct mfcctl mfc; 8681da177e4SLinus Torvalds 869132adf54SStephen Hemminger if (optname != MRT_INIT) { 8701da177e4SLinus Torvalds if (sk != mroute_socket && !capable(CAP_NET_ADMIN)) 8711da177e4SLinus Torvalds return -EACCES; 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 874132adf54SStephen Hemminger switch (optname) { 8751da177e4SLinus Torvalds case MRT_INIT: 8761da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || 8771da177e4SLinus Torvalds inet_sk(sk)->num != IPPROTO_IGMP) 8781da177e4SLinus Torvalds return -EOPNOTSUPP; 8791da177e4SLinus Torvalds if (optlen!=sizeof(int)) 8801da177e4SLinus Torvalds return -ENOPROTOOPT; 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds rtnl_lock(); 8831da177e4SLinus Torvalds if (mroute_socket) { 8841da177e4SLinus Torvalds rtnl_unlock(); 8851da177e4SLinus Torvalds return -EADDRINUSE; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds ret = ip_ra_control(sk, 1, mrtsock_destruct); 8891da177e4SLinus Torvalds if (ret == 0) { 8901da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8911da177e4SLinus Torvalds mroute_socket=sk; 8921da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8931da177e4SLinus Torvalds 8943b1e0a65SYOSHIFUJI Hideaki IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)++; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds rtnl_unlock(); 8971da177e4SLinus Torvalds return ret; 8981da177e4SLinus Torvalds case MRT_DONE: 8991da177e4SLinus Torvalds if (sk!=mroute_socket) 9001da177e4SLinus Torvalds return -EACCES; 9011da177e4SLinus Torvalds return ip_ra_control(sk, 0, NULL); 9021da177e4SLinus Torvalds case MRT_ADD_VIF: 9031da177e4SLinus Torvalds case MRT_DEL_VIF: 9041da177e4SLinus Torvalds if (optlen!=sizeof(vif)) 9051da177e4SLinus Torvalds return -EINVAL; 9061da177e4SLinus Torvalds if (copy_from_user(&vif,optval,sizeof(vif))) 9071da177e4SLinus Torvalds return -EFAULT; 9081da177e4SLinus Torvalds if (vif.vifc_vifi >= MAXVIFS) 9091da177e4SLinus Torvalds return -ENFILE; 9101da177e4SLinus Torvalds rtnl_lock(); 9111da177e4SLinus Torvalds if (optname==MRT_ADD_VIF) { 9121da177e4SLinus Torvalds ret = vif_add(&vif, sk==mroute_socket); 9131da177e4SLinus Torvalds } else { 9141da177e4SLinus Torvalds ret = vif_delete(vif.vifc_vifi); 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds rtnl_unlock(); 9171da177e4SLinus Torvalds return ret; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds /* 9201da177e4SLinus Torvalds * Manipulate the forwarding caches. These live 9211da177e4SLinus Torvalds * in a sort of kernel/user symbiosis. 9221da177e4SLinus Torvalds */ 9231da177e4SLinus Torvalds case MRT_ADD_MFC: 9241da177e4SLinus Torvalds case MRT_DEL_MFC: 9251da177e4SLinus Torvalds if (optlen!=sizeof(mfc)) 9261da177e4SLinus Torvalds return -EINVAL; 9271da177e4SLinus Torvalds if (copy_from_user(&mfc,optval, sizeof(mfc))) 9281da177e4SLinus Torvalds return -EFAULT; 9291da177e4SLinus Torvalds rtnl_lock(); 9301da177e4SLinus Torvalds if (optname==MRT_DEL_MFC) 9311da177e4SLinus Torvalds ret = ipmr_mfc_delete(&mfc); 9321da177e4SLinus Torvalds else 9331da177e4SLinus Torvalds ret = ipmr_mfc_add(&mfc, sk==mroute_socket); 9341da177e4SLinus Torvalds rtnl_unlock(); 9351da177e4SLinus Torvalds return ret; 9361da177e4SLinus Torvalds /* 9371da177e4SLinus Torvalds * Control PIM assert. 9381da177e4SLinus Torvalds */ 9391da177e4SLinus Torvalds case MRT_ASSERT: 9401da177e4SLinus Torvalds { 9411da177e4SLinus Torvalds int v; 9421da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9431da177e4SLinus Torvalds return -EFAULT; 9441da177e4SLinus Torvalds mroute_do_assert=(v)?1:0; 9451da177e4SLinus Torvalds return 0; 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 9481da177e4SLinus Torvalds case MRT_PIM: 9491da177e4SLinus Torvalds { 950ba93ef74SStephen Hemminger int v; 951ba93ef74SStephen Hemminger 9521da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 9531da177e4SLinus Torvalds return -EFAULT; 9541da177e4SLinus Torvalds v = (v) ? 1 : 0; 955ba93ef74SStephen Hemminger 9561da177e4SLinus Torvalds rtnl_lock(); 9571da177e4SLinus Torvalds ret = 0; 9581da177e4SLinus Torvalds if (v != mroute_do_pim) { 9591da177e4SLinus Torvalds mroute_do_pim = v; 9601da177e4SLinus Torvalds mroute_do_assert = v; 9611da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 9621da177e4SLinus Torvalds if (mroute_do_pim) 9631da177e4SLinus Torvalds ret = inet_add_protocol(&pim_protocol, 9641da177e4SLinus Torvalds IPPROTO_PIM); 9651da177e4SLinus Torvalds else 9661da177e4SLinus Torvalds ret = inet_del_protocol(&pim_protocol, 9671da177e4SLinus Torvalds IPPROTO_PIM); 9681da177e4SLinus Torvalds if (ret < 0) 9691da177e4SLinus Torvalds ret = -EAGAIN; 9701da177e4SLinus Torvalds #endif 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds rtnl_unlock(); 9731da177e4SLinus Torvalds return ret; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds #endif 9761da177e4SLinus Torvalds /* 9771da177e4SLinus Torvalds * Spurious command, or MRT_VERSION which you cannot 9781da177e4SLinus Torvalds * set. 9791da177e4SLinus Torvalds */ 9801da177e4SLinus Torvalds default: 9811da177e4SLinus Torvalds return -ENOPROTOOPT; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds /* 9861da177e4SLinus Torvalds * Getsock opt support for the multicast routing system. 9871da177e4SLinus Torvalds */ 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds int ip_mroute_getsockopt(struct sock *sk,int optname,char __user *optval,int __user *optlen) 9901da177e4SLinus Torvalds { 9911da177e4SLinus Torvalds int olr; 9921da177e4SLinus Torvalds int val; 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds if (optname!=MRT_VERSION && 9951da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 9961da177e4SLinus Torvalds optname!=MRT_PIM && 9971da177e4SLinus Torvalds #endif 9981da177e4SLinus Torvalds optname!=MRT_ASSERT) 9991da177e4SLinus Torvalds return -ENOPROTOOPT; 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds if (get_user(olr, optlen)) 10021da177e4SLinus Torvalds return -EFAULT; 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds olr = min_t(unsigned int, olr, sizeof(int)); 10051da177e4SLinus Torvalds if (olr < 0) 10061da177e4SLinus Torvalds return -EINVAL; 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds if (put_user(olr,optlen)) 10091da177e4SLinus Torvalds return -EFAULT; 10101da177e4SLinus Torvalds if (optname==MRT_VERSION) 10111da177e4SLinus Torvalds val=0x0305; 10121da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10131da177e4SLinus Torvalds else if (optname==MRT_PIM) 10141da177e4SLinus Torvalds val=mroute_do_pim; 10151da177e4SLinus Torvalds #endif 10161da177e4SLinus Torvalds else 10171da177e4SLinus Torvalds val=mroute_do_assert; 10181da177e4SLinus Torvalds if (copy_to_user(optval,&val,olr)) 10191da177e4SLinus Torvalds return -EFAULT; 10201da177e4SLinus Torvalds return 0; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds /* 10241da177e4SLinus Torvalds * The IP multicast ioctl support routines. 10251da177e4SLinus Torvalds */ 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 10281da177e4SLinus Torvalds { 10291da177e4SLinus Torvalds struct sioc_sg_req sr; 10301da177e4SLinus Torvalds struct sioc_vif_req vr; 10311da177e4SLinus Torvalds struct vif_device *vif; 10321da177e4SLinus Torvalds struct mfc_cache *c; 10331da177e4SLinus Torvalds 1034132adf54SStephen Hemminger switch (cmd) { 10351da177e4SLinus Torvalds case SIOCGETVIFCNT: 10361da177e4SLinus Torvalds if (copy_from_user(&vr,arg,sizeof(vr))) 10371da177e4SLinus Torvalds return -EFAULT; 10381da177e4SLinus Torvalds if (vr.vifi>=maxvif) 10391da177e4SLinus Torvalds return -EINVAL; 10401da177e4SLinus Torvalds read_lock(&mrt_lock); 10411da177e4SLinus Torvalds vif=&vif_table[vr.vifi]; 10421da177e4SLinus Torvalds if (VIF_EXISTS(vr.vifi)) { 10431da177e4SLinus Torvalds vr.icount=vif->pkt_in; 10441da177e4SLinus Torvalds vr.ocount=vif->pkt_out; 10451da177e4SLinus Torvalds vr.ibytes=vif->bytes_in; 10461da177e4SLinus Torvalds vr.obytes=vif->bytes_out; 10471da177e4SLinus Torvalds read_unlock(&mrt_lock); 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds if (copy_to_user(arg,&vr,sizeof(vr))) 10501da177e4SLinus Torvalds return -EFAULT; 10511da177e4SLinus Torvalds return 0; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds read_unlock(&mrt_lock); 10541da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10551da177e4SLinus Torvalds case SIOCGETSGCNT: 10561da177e4SLinus Torvalds if (copy_from_user(&sr,arg,sizeof(sr))) 10571da177e4SLinus Torvalds return -EFAULT; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds read_lock(&mrt_lock); 10601da177e4SLinus Torvalds c = ipmr_cache_find(sr.src.s_addr, sr.grp.s_addr); 10611da177e4SLinus Torvalds if (c) { 10621da177e4SLinus Torvalds sr.pktcnt = c->mfc_un.res.pkt; 10631da177e4SLinus Torvalds sr.bytecnt = c->mfc_un.res.bytes; 10641da177e4SLinus Torvalds sr.wrong_if = c->mfc_un.res.wrong_if; 10651da177e4SLinus Torvalds read_unlock(&mrt_lock); 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds if (copy_to_user(arg,&sr,sizeof(sr))) 10681da177e4SLinus Torvalds return -EFAULT; 10691da177e4SLinus Torvalds return 0; 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds read_unlock(&mrt_lock); 10721da177e4SLinus Torvalds return -EADDRNOTAVAIL; 10731da177e4SLinus Torvalds default: 10741da177e4SLinus Torvalds return -ENOIOCTLCMD; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) 10801da177e4SLinus Torvalds { 1081e9dc8653SEric W. Biederman struct net_device *dev = ptr; 10821da177e4SLinus Torvalds struct vif_device *v; 10831da177e4SLinus Torvalds int ct; 1084e9dc8653SEric W. Biederman 1085c346dca1SYOSHIFUJI Hideaki if (dev_net(dev) != &init_net) 1086e9dc8653SEric W. Biederman return NOTIFY_DONE; 1087e9dc8653SEric W. Biederman 10881da177e4SLinus Torvalds if (event != NETDEV_UNREGISTER) 10891da177e4SLinus Torvalds return NOTIFY_DONE; 10901da177e4SLinus Torvalds v=&vif_table[0]; 10911da177e4SLinus Torvalds for (ct=0;ct<maxvif;ct++,v++) { 1092e9dc8653SEric W. Biederman if (v->dev==dev) 10931da177e4SLinus Torvalds vif_delete(ct); 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds return NOTIFY_DONE; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds static struct notifier_block ip_mr_notifier={ 11001da177e4SLinus Torvalds .notifier_call = ipmr_device_event, 11011da177e4SLinus Torvalds }; 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds /* 11041da177e4SLinus Torvalds * Encapsulate a packet by attaching a valid IPIP header to it. 11051da177e4SLinus Torvalds * This avoids tunnel drivers and other mess and gives us the speed so 11061da177e4SLinus Torvalds * important for multicast video. 11071da177e4SLinus Torvalds */ 11081da177e4SLinus Torvalds 1109114c7844SAl Viro static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr) 11101da177e4SLinus Torvalds { 11118856dfa3SArnaldo Carvalho de Melo struct iphdr *iph; 1112eddc9ec5SArnaldo Carvalho de Melo struct iphdr *old_iph = ip_hdr(skb); 11138856dfa3SArnaldo Carvalho de Melo 11148856dfa3SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 1115b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 11168856dfa3SArnaldo Carvalho de Melo skb_reset_network_header(skb); 1117eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds iph->version = 4; 1120e023dd64SArnaldo Carvalho de Melo iph->tos = old_iph->tos; 1121e023dd64SArnaldo Carvalho de Melo iph->ttl = old_iph->ttl; 11221da177e4SLinus Torvalds iph->frag_off = 0; 11231da177e4SLinus Torvalds iph->daddr = daddr; 11241da177e4SLinus Torvalds iph->saddr = saddr; 11251da177e4SLinus Torvalds iph->protocol = IPPROTO_IPIP; 11261da177e4SLinus Torvalds iph->ihl = 5; 11271da177e4SLinus Torvalds iph->tot_len = htons(skb->len); 11281da177e4SLinus Torvalds ip_select_ident(iph, skb->dst, NULL); 11291da177e4SLinus Torvalds ip_send_check(iph); 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 11321da177e4SLinus Torvalds nf_reset(skb); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds static inline int ipmr_forward_finish(struct sk_buff *skb) 11361da177e4SLinus Torvalds { 11371da177e4SLinus Torvalds struct ip_options * opt = &(IPCB(skb)->opt); 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_OUTFORWDATAGRAMS); 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds if (unlikely(opt->optlen)) 11421da177e4SLinus Torvalds ip_forward_options(skb); 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds return dst_output(skb); 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds /* 11481da177e4SLinus Torvalds * Processing handlers for ipmr_forward 11491da177e4SLinus Torvalds */ 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi) 11521da177e4SLinus Torvalds { 1153eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 11541da177e4SLinus Torvalds struct vif_device *vif = &vif_table[vifi]; 11551da177e4SLinus Torvalds struct net_device *dev; 11561da177e4SLinus Torvalds struct rtable *rt; 11571da177e4SLinus Torvalds int encap = 0; 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds if (vif->dev == NULL) 11601da177e4SLinus Torvalds goto out_free; 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 11631da177e4SLinus Torvalds if (vif->flags & VIFF_REGISTER) { 11641da177e4SLinus Torvalds vif->pkt_out++; 11651da177e4SLinus Torvalds vif->bytes_out+=skb->len; 1166*cf3677aeSPavel Emelyanov vif->dev->stats.tx_bytes += skb->len; 1167*cf3677aeSPavel Emelyanov vif->dev->stats.tx_packets++; 11681da177e4SLinus Torvalds ipmr_cache_report(skb, vifi, IGMPMSG_WHOLEPKT); 11691da177e4SLinus Torvalds kfree_skb(skb); 11701da177e4SLinus Torvalds return; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds #endif 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds if (vif->flags&VIFF_TUNNEL) { 11751da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11761da177e4SLinus Torvalds .nl_u = { .ip4_u = 11771da177e4SLinus Torvalds { .daddr = vif->remote, 11781da177e4SLinus Torvalds .saddr = vif->local, 11791da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11801da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 1181f206351aSDenis V. Lunev if (ip_route_output_key(&init_net, &rt, &fl)) 11821da177e4SLinus Torvalds goto out_free; 11831da177e4SLinus Torvalds encap = sizeof(struct iphdr); 11841da177e4SLinus Torvalds } else { 11851da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 11861da177e4SLinus Torvalds .nl_u = { .ip4_u = 11871da177e4SLinus Torvalds { .daddr = iph->daddr, 11881da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 11891da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 1190f206351aSDenis V. Lunev if (ip_route_output_key(&init_net, &rt, &fl)) 11911da177e4SLinus Torvalds goto out_free; 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds dev = rt->u.dst.dev; 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) { 11971da177e4SLinus Torvalds /* Do not fragment multicasts. Alas, IPv4 does not 11981da177e4SLinus Torvalds allow to send ICMP, so that packets will disappear 11991da177e4SLinus Torvalds to blackhole. 12001da177e4SLinus Torvalds */ 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds IP_INC_STATS_BH(IPSTATS_MIB_FRAGFAILS); 12031da177e4SLinus Torvalds ip_rt_put(rt); 12041da177e4SLinus Torvalds goto out_free; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds encap += LL_RESERVED_SPACE(dev) + rt->u.dst.header_len; 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds if (skb_cow(skb, encap)) { 12101da177e4SLinus Torvalds ip_rt_put(rt); 12111da177e4SLinus Torvalds goto out_free; 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds 12141da177e4SLinus Torvalds vif->pkt_out++; 12151da177e4SLinus Torvalds vif->bytes_out+=skb->len; 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds dst_release(skb->dst); 12181da177e4SLinus Torvalds skb->dst = &rt->u.dst; 1219eddc9ec5SArnaldo Carvalho de Melo ip_decrease_ttl(ip_hdr(skb)); 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds /* FIXME: forward and output firewalls used to be called here. 12221da177e4SLinus Torvalds * What do we do with netfilter? -- RR */ 12231da177e4SLinus Torvalds if (vif->flags & VIFF_TUNNEL) { 12241da177e4SLinus Torvalds ip_encap(skb, vif->local, vif->remote); 12251da177e4SLinus Torvalds /* FIXME: extra output firewall step used to be here. --RR */ 12262f4c02d4SPavel Emelyanov vif->dev->stats.tx_packets++; 12272f4c02d4SPavel Emelyanov vif->dev->stats.tx_bytes += skb->len; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds IPCB(skb)->flags |= IPSKB_FORWARDED; 12311da177e4SLinus Torvalds 12321da177e4SLinus Torvalds /* 12331da177e4SLinus Torvalds * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally 12341da177e4SLinus Torvalds * not only before forwarding, but after forwarding on all output 12351da177e4SLinus Torvalds * interfaces. It is clear, if mrouter runs a multicasting 12361da177e4SLinus Torvalds * program, it should receive packets not depending to what interface 12371da177e4SLinus Torvalds * program is joined. 12381da177e4SLinus Torvalds * If we will not make it, the program will have to join on all 12391da177e4SLinus Torvalds * interfaces. On the other hand, multihoming host (or router, but 12401da177e4SLinus Torvalds * not mrouter) cannot join to more than one interface - it will 12411da177e4SLinus Torvalds * result in receiving multiple packets. 12421da177e4SLinus Torvalds */ 12436e23ae2aSPatrick McHardy NF_HOOK(PF_INET, NF_INET_FORWARD, skb, skb->dev, dev, 12441da177e4SLinus Torvalds ipmr_forward_finish); 12451da177e4SLinus Torvalds return; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds out_free: 12481da177e4SLinus Torvalds kfree_skb(skb); 12491da177e4SLinus Torvalds return; 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds static int ipmr_find_vif(struct net_device *dev) 12531da177e4SLinus Torvalds { 12541da177e4SLinus Torvalds int ct; 12551da177e4SLinus Torvalds for (ct=maxvif-1; ct>=0; ct--) { 12561da177e4SLinus Torvalds if (vif_table[ct].dev == dev) 12571da177e4SLinus Torvalds break; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds return ct; 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds /* "local" means that we should preserve one skb (for local delivery) */ 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local) 12651da177e4SLinus Torvalds { 12661da177e4SLinus Torvalds int psend = -1; 12671da177e4SLinus Torvalds int vif, ct; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds vif = cache->mfc_parent; 12701da177e4SLinus Torvalds cache->mfc_un.res.pkt++; 12711da177e4SLinus Torvalds cache->mfc_un.res.bytes += skb->len; 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvalds /* 12741da177e4SLinus Torvalds * Wrong interface: drop packet and (maybe) send PIM assert. 12751da177e4SLinus Torvalds */ 12761da177e4SLinus Torvalds if (vif_table[vif].dev != skb->dev) { 12771da177e4SLinus Torvalds int true_vifi; 12781da177e4SLinus Torvalds 1279ee6b9673SEric Dumazet if (skb->rtable->fl.iif == 0) { 12801da177e4SLinus Torvalds /* It is our own packet, looped back. 12811da177e4SLinus Torvalds Very complicated situation... 12821da177e4SLinus Torvalds 12831da177e4SLinus Torvalds The best workaround until routing daemons will be 12841da177e4SLinus Torvalds fixed is not to redistribute packet, if it was 12851da177e4SLinus Torvalds send through wrong interface. It means, that 12861da177e4SLinus Torvalds multicast applications WILL NOT work for 12871da177e4SLinus Torvalds (S,G), which have default multicast route pointing 12881da177e4SLinus Torvalds to wrong oif. In any case, it is not a good 12891da177e4SLinus Torvalds idea to use multicasting applications on router. 12901da177e4SLinus Torvalds */ 12911da177e4SLinus Torvalds goto dont_forward; 12921da177e4SLinus Torvalds } 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds cache->mfc_un.res.wrong_if++; 12951da177e4SLinus Torvalds true_vifi = ipmr_find_vif(skb->dev); 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds if (true_vifi >= 0 && mroute_do_assert && 12981da177e4SLinus Torvalds /* pimsm uses asserts, when switching from RPT to SPT, 12991da177e4SLinus Torvalds so that we cannot check that packet arrived on an oif. 13001da177e4SLinus Torvalds It is bad, but otherwise we would need to move pretty 13011da177e4SLinus Torvalds large chunk of pimd to kernel. Ough... --ANK 13021da177e4SLinus Torvalds */ 13031da177e4SLinus Torvalds (mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) && 13041da177e4SLinus Torvalds time_after(jiffies, 13051da177e4SLinus Torvalds cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { 13061da177e4SLinus Torvalds cache->mfc_un.res.last_assert = jiffies; 13071da177e4SLinus Torvalds ipmr_cache_report(skb, true_vifi, IGMPMSG_WRONGVIF); 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds goto dont_forward; 13101da177e4SLinus Torvalds } 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds vif_table[vif].pkt_in++; 13131da177e4SLinus Torvalds vif_table[vif].bytes_in+=skb->len; 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds /* 13161da177e4SLinus Torvalds * Forward the frame 13171da177e4SLinus Torvalds */ 13181da177e4SLinus Torvalds for (ct = cache->mfc_un.res.maxvif-1; ct >= cache->mfc_un.res.minvif; ct--) { 1319eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { 13201da177e4SLinus Torvalds if (psend != -1) { 13211da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13221da177e4SLinus Torvalds if (skb2) 13231da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds psend=ct; 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds if (psend != -1) { 13291da177e4SLinus Torvalds if (local) { 13301da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13311da177e4SLinus Torvalds if (skb2) 13321da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13331da177e4SLinus Torvalds } else { 13341da177e4SLinus Torvalds ipmr_queue_xmit(skb, cache, psend); 13351da177e4SLinus Torvalds return 0; 13361da177e4SLinus Torvalds } 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds dont_forward: 13401da177e4SLinus Torvalds if (!local) 13411da177e4SLinus Torvalds kfree_skb(skb); 13421da177e4SLinus Torvalds return 0; 13431da177e4SLinus Torvalds } 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds /* 13471da177e4SLinus Torvalds * Multicast packets for forwarding arrive here 13481da177e4SLinus Torvalds */ 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds int ip_mr_input(struct sk_buff *skb) 13511da177e4SLinus Torvalds { 13521da177e4SLinus Torvalds struct mfc_cache *cache; 1353ee6b9673SEric Dumazet int local = skb->rtable->rt_flags&RTCF_LOCAL; 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds /* Packet is looped back after forward, it should not be 13561da177e4SLinus Torvalds forwarded second time, but still can be delivered locally. 13571da177e4SLinus Torvalds */ 13581da177e4SLinus Torvalds if (IPCB(skb)->flags&IPSKB_FORWARDED) 13591da177e4SLinus Torvalds goto dont_forward; 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds if (!local) { 13621da177e4SLinus Torvalds if (IPCB(skb)->opt.router_alert) { 13631da177e4SLinus Torvalds if (ip_call_ra_chain(skb)) 13641da177e4SLinus Torvalds return 0; 1365eddc9ec5SArnaldo Carvalho de Melo } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP){ 13661da177e4SLinus Torvalds /* IGMPv1 (and broken IGMPv2 implementations sort of 13671da177e4SLinus Torvalds Cisco IOS <= 11.2(8)) do not put router alert 13681da177e4SLinus Torvalds option to IGMP packets destined to routable 13691da177e4SLinus Torvalds groups. It is very bad, because it means 13701da177e4SLinus Torvalds that we can forward NO IGMP messages. 13711da177e4SLinus Torvalds */ 13721da177e4SLinus Torvalds read_lock(&mrt_lock); 13731da177e4SLinus Torvalds if (mroute_socket) { 13742715bcf9SPatrick McHardy nf_reset(skb); 13751da177e4SLinus Torvalds raw_rcv(mroute_socket, skb); 13761da177e4SLinus Torvalds read_unlock(&mrt_lock); 13771da177e4SLinus Torvalds return 0; 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds read_unlock(&mrt_lock); 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds } 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds read_lock(&mrt_lock); 1384eddc9ec5SArnaldo Carvalho de Melo cache = ipmr_cache_find(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds /* 13871da177e4SLinus Torvalds * No usable cache entry 13881da177e4SLinus Torvalds */ 13891da177e4SLinus Torvalds if (cache==NULL) { 13901da177e4SLinus Torvalds int vif; 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds if (local) { 13931da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13941da177e4SLinus Torvalds ip_local_deliver(skb); 13951da177e4SLinus Torvalds if (skb2 == NULL) { 13961da177e4SLinus Torvalds read_unlock(&mrt_lock); 13971da177e4SLinus Torvalds return -ENOBUFS; 13981da177e4SLinus Torvalds } 13991da177e4SLinus Torvalds skb = skb2; 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds vif = ipmr_find_vif(skb->dev); 14031da177e4SLinus Torvalds if (vif >= 0) { 14041da177e4SLinus Torvalds int err = ipmr_cache_unresolved(vif, skb); 14051da177e4SLinus Torvalds read_unlock(&mrt_lock); 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds return err; 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds read_unlock(&mrt_lock); 14101da177e4SLinus Torvalds kfree_skb(skb); 14111da177e4SLinus Torvalds return -ENODEV; 14121da177e4SLinus Torvalds } 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds ip_mr_forward(skb, cache, local); 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds read_unlock(&mrt_lock); 14171da177e4SLinus Torvalds 14181da177e4SLinus Torvalds if (local) 14191da177e4SLinus Torvalds return ip_local_deliver(skb); 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds return 0; 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds dont_forward: 14241da177e4SLinus Torvalds if (local) 14251da177e4SLinus Torvalds return ip_local_deliver(skb); 14261da177e4SLinus Torvalds kfree_skb(skb); 14271da177e4SLinus Torvalds return 0; 14281da177e4SLinus Torvalds } 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V1 14311da177e4SLinus Torvalds /* 14321da177e4SLinus Torvalds * Handle IGMP messages of PIMv1 14331da177e4SLinus Torvalds */ 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds int pim_rcv_v1(struct sk_buff * skb) 14361da177e4SLinus Torvalds { 14371da177e4SLinus Torvalds struct igmphdr *pim; 14381da177e4SLinus Torvalds struct iphdr *encap; 14391da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 14421da177e4SLinus Torvalds goto drop; 14431da177e4SLinus Torvalds 1444d9edf9e2SArnaldo Carvalho de Melo pim = igmp_hdr(skb); 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds if (!mroute_do_pim || 14471da177e4SLinus Torvalds skb->len < sizeof(*pim) + sizeof(*encap) || 14481da177e4SLinus Torvalds pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) 14491da177e4SLinus Torvalds goto drop; 14501da177e4SLinus Torvalds 14519c70220bSArnaldo Carvalho de Melo encap = (struct iphdr *)(skb_transport_header(skb) + 14529c70220bSArnaldo Carvalho de Melo sizeof(struct igmphdr)); 14531da177e4SLinus Torvalds /* 14541da177e4SLinus Torvalds Check that: 14551da177e4SLinus Torvalds a. packet is really destinted to a multicast group 14561da177e4SLinus Torvalds b. packet is not a NULL-REGISTER 14571da177e4SLinus Torvalds c. packet is not truncated 14581da177e4SLinus Torvalds */ 1459f97c1e0cSJoe Perches if (!ipv4_is_multicast(encap->daddr) || 14601da177e4SLinus Torvalds encap->tot_len == 0 || 14611da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 14621da177e4SLinus Torvalds goto drop; 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds read_lock(&mrt_lock); 14651da177e4SLinus Torvalds if (reg_vif_num >= 0) 14661da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 14671da177e4SLinus Torvalds if (reg_dev) 14681da177e4SLinus Torvalds dev_hold(reg_dev); 14691da177e4SLinus Torvalds read_unlock(&mrt_lock); 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds if (reg_dev == NULL) 14721da177e4SLinus Torvalds goto drop; 14731da177e4SLinus Torvalds 1474b0e380b1SArnaldo Carvalho de Melo skb->mac_header = skb->network_header; 14751da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 147631c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 14771da177e4SLinus Torvalds skb->dev = reg_dev; 14781da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 14791da177e4SLinus Torvalds skb->ip_summed = 0; 14801da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 14811da177e4SLinus Torvalds dst_release(skb->dst); 14821da177e4SLinus Torvalds skb->dst = NULL; 1483*cf3677aeSPavel Emelyanov reg_dev->stats.rx_bytes += skb->len; 1484*cf3677aeSPavel Emelyanov reg_dev->stats.rx_packets++; 14851da177e4SLinus Torvalds nf_reset(skb); 14861da177e4SLinus Torvalds netif_rx(skb); 14871da177e4SLinus Torvalds dev_put(reg_dev); 14881da177e4SLinus Torvalds return 0; 14891da177e4SLinus Torvalds drop: 14901da177e4SLinus Torvalds kfree_skb(skb); 14911da177e4SLinus Torvalds return 0; 14921da177e4SLinus Torvalds } 14931da177e4SLinus Torvalds #endif 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 14961da177e4SLinus Torvalds static int pim_rcv(struct sk_buff * skb) 14971da177e4SLinus Torvalds { 14981da177e4SLinus Torvalds struct pimreghdr *pim; 14991da177e4SLinus Torvalds struct iphdr *encap; 15001da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) 15031da177e4SLinus Torvalds goto drop; 15041da177e4SLinus Torvalds 15059c70220bSArnaldo Carvalho de Melo pim = (struct pimreghdr *)skb_transport_header(skb); 15061da177e4SLinus Torvalds if (pim->type != ((PIM_VERSION<<4)|(PIM_REGISTER)) || 15071da177e4SLinus Torvalds (pim->flags&PIM_NULL_REGISTER) || 15081da177e4SLinus Torvalds (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && 1509d3bc23e7SAl Viro csum_fold(skb_checksum(skb, 0, skb->len, 0)))) 15101da177e4SLinus Torvalds goto drop; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds /* check if the inner packet is destined to mcast group */ 15139c70220bSArnaldo Carvalho de Melo encap = (struct iphdr *)(skb_transport_header(skb) + 15149c70220bSArnaldo Carvalho de Melo sizeof(struct pimreghdr)); 1515f97c1e0cSJoe Perches if (!ipv4_is_multicast(encap->daddr) || 15161da177e4SLinus Torvalds encap->tot_len == 0 || 15171da177e4SLinus Torvalds ntohs(encap->tot_len) + sizeof(*pim) > skb->len) 15181da177e4SLinus Torvalds goto drop; 15191da177e4SLinus Torvalds 15201da177e4SLinus Torvalds read_lock(&mrt_lock); 15211da177e4SLinus Torvalds if (reg_vif_num >= 0) 15221da177e4SLinus Torvalds reg_dev = vif_table[reg_vif_num].dev; 15231da177e4SLinus Torvalds if (reg_dev) 15241da177e4SLinus Torvalds dev_hold(reg_dev); 15251da177e4SLinus Torvalds read_unlock(&mrt_lock); 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds if (reg_dev == NULL) 15281da177e4SLinus Torvalds goto drop; 15291da177e4SLinus Torvalds 1530b0e380b1SArnaldo Carvalho de Melo skb->mac_header = skb->network_header; 15311da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 153231c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 15331da177e4SLinus Torvalds skb->dev = reg_dev; 15341da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 15351da177e4SLinus Torvalds skb->ip_summed = 0; 15361da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 15371da177e4SLinus Torvalds dst_release(skb->dst); 1538*cf3677aeSPavel Emelyanov reg_dev->stats.rx_bytes += skb->len; 1539*cf3677aeSPavel Emelyanov reg_dev->stats.rx_packets++; 15401da177e4SLinus Torvalds skb->dst = NULL; 15411da177e4SLinus Torvalds nf_reset(skb); 15421da177e4SLinus Torvalds netif_rx(skb); 15431da177e4SLinus Torvalds dev_put(reg_dev); 15441da177e4SLinus Torvalds return 0; 15451da177e4SLinus Torvalds drop: 15461da177e4SLinus Torvalds kfree_skb(skb); 15471da177e4SLinus Torvalds return 0; 15481da177e4SLinus Torvalds } 15491da177e4SLinus Torvalds #endif 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds static int 15521da177e4SLinus Torvalds ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm) 15531da177e4SLinus Torvalds { 15541da177e4SLinus Torvalds int ct; 15551da177e4SLinus Torvalds struct rtnexthop *nhp; 15561da177e4SLinus Torvalds struct net_device *dev = vif_table[c->mfc_parent].dev; 155727a884dcSArnaldo Carvalho de Melo u8 *b = skb_tail_pointer(skb); 15581da177e4SLinus Torvalds struct rtattr *mp_head; 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds if (dev) 15611da177e4SLinus Torvalds RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex); 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds mp_head = (struct rtattr*)skb_put(skb, RTA_LENGTH(0)); 15641da177e4SLinus Torvalds 15651da177e4SLinus Torvalds for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { 15661da177e4SLinus Torvalds if (c->mfc_un.res.ttls[ct] < 255) { 15671da177e4SLinus Torvalds if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4)) 15681da177e4SLinus Torvalds goto rtattr_failure; 15691da177e4SLinus Torvalds nhp = (struct rtnexthop*)skb_put(skb, RTA_ALIGN(sizeof(*nhp))); 15701da177e4SLinus Torvalds nhp->rtnh_flags = 0; 15711da177e4SLinus Torvalds nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; 15721da177e4SLinus Torvalds nhp->rtnh_ifindex = vif_table[ct].dev->ifindex; 15731da177e4SLinus Torvalds nhp->rtnh_len = sizeof(*nhp); 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds mp_head->rta_type = RTA_MULTIPATH; 157727a884dcSArnaldo Carvalho de Melo mp_head->rta_len = skb_tail_pointer(skb) - (u8 *)mp_head; 15781da177e4SLinus Torvalds rtm->rtm_type = RTN_MULTICAST; 15791da177e4SLinus Torvalds return 1; 15801da177e4SLinus Torvalds 15811da177e4SLinus Torvalds rtattr_failure: 1582dc5fc579SArnaldo Carvalho de Melo nlmsg_trim(skb, b); 15831da177e4SLinus Torvalds return -EMSGSIZE; 15841da177e4SLinus Torvalds } 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait) 15871da177e4SLinus Torvalds { 15881da177e4SLinus Torvalds int err; 15891da177e4SLinus Torvalds struct mfc_cache *cache; 1590ee6b9673SEric Dumazet struct rtable *rt = skb->rtable; 15911da177e4SLinus Torvalds 15921da177e4SLinus Torvalds read_lock(&mrt_lock); 15931da177e4SLinus Torvalds cache = ipmr_cache_find(rt->rt_src, rt->rt_dst); 15941da177e4SLinus Torvalds 15951da177e4SLinus Torvalds if (cache==NULL) { 159672287490SAlexey Kuznetsov struct sk_buff *skb2; 1597eddc9ec5SArnaldo Carvalho de Melo struct iphdr *iph; 15981da177e4SLinus Torvalds struct net_device *dev; 15991da177e4SLinus Torvalds int vif; 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds if (nowait) { 16021da177e4SLinus Torvalds read_unlock(&mrt_lock); 16031da177e4SLinus Torvalds return -EAGAIN; 16041da177e4SLinus Torvalds } 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds dev = skb->dev; 16071da177e4SLinus Torvalds if (dev == NULL || (vif = ipmr_find_vif(dev)) < 0) { 16081da177e4SLinus Torvalds read_unlock(&mrt_lock); 16091da177e4SLinus Torvalds return -ENODEV; 16101da177e4SLinus Torvalds } 161172287490SAlexey Kuznetsov skb2 = skb_clone(skb, GFP_ATOMIC); 161272287490SAlexey Kuznetsov if (!skb2) { 161372287490SAlexey Kuznetsov read_unlock(&mrt_lock); 161472287490SAlexey Kuznetsov return -ENOMEM; 161572287490SAlexey Kuznetsov } 161672287490SAlexey Kuznetsov 1617e2d1bca7SArnaldo Carvalho de Melo skb_push(skb2, sizeof(struct iphdr)); 1618e2d1bca7SArnaldo Carvalho de Melo skb_reset_network_header(skb2); 1619eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb2); 1620eddc9ec5SArnaldo Carvalho de Melo iph->ihl = sizeof(struct iphdr) >> 2; 1621eddc9ec5SArnaldo Carvalho de Melo iph->saddr = rt->rt_src; 1622eddc9ec5SArnaldo Carvalho de Melo iph->daddr = rt->rt_dst; 1623eddc9ec5SArnaldo Carvalho de Melo iph->version = 0; 162472287490SAlexey Kuznetsov err = ipmr_cache_unresolved(vif, skb2); 16251da177e4SLinus Torvalds read_unlock(&mrt_lock); 16261da177e4SLinus Torvalds return err; 16271da177e4SLinus Torvalds } 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) 16301da177e4SLinus Torvalds cache->mfc_flags |= MFC_NOTIFY; 16311da177e4SLinus Torvalds err = ipmr_fill_mroute(skb, cache, rtm); 16321da177e4SLinus Torvalds read_unlock(&mrt_lock); 16331da177e4SLinus Torvalds return err; 16341da177e4SLinus Torvalds } 16351da177e4SLinus Torvalds 16361da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 16371da177e4SLinus Torvalds /* 16381da177e4SLinus Torvalds * The /proc interfaces to multicast routing /proc/ip_mr_cache /proc/ip_mr_vif 16391da177e4SLinus Torvalds */ 16401da177e4SLinus Torvalds struct ipmr_vif_iter { 16411da177e4SLinus Torvalds int ct; 16421da177e4SLinus Torvalds }; 16431da177e4SLinus Torvalds 16441da177e4SLinus Torvalds static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter, 16451da177e4SLinus Torvalds loff_t pos) 16461da177e4SLinus Torvalds { 16471da177e4SLinus Torvalds for (iter->ct = 0; iter->ct < maxvif; ++iter->ct) { 16481da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16491da177e4SLinus Torvalds continue; 16501da177e4SLinus Torvalds if (pos-- == 0) 16511da177e4SLinus Torvalds return &vif_table[iter->ct]; 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds return NULL; 16541da177e4SLinus Torvalds } 16551da177e4SLinus Torvalds 16561da177e4SLinus Torvalds static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) 1657ba93ef74SStephen Hemminger __acquires(mrt_lock) 16581da177e4SLinus Torvalds { 16591da177e4SLinus Torvalds read_lock(&mrt_lock); 16601da177e4SLinus Torvalds return *pos ? ipmr_vif_seq_idx(seq->private, *pos - 1) 16611da177e4SLinus Torvalds : SEQ_START_TOKEN; 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvalds static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) 16651da177e4SLinus Torvalds { 16661da177e4SLinus Torvalds struct ipmr_vif_iter *iter = seq->private; 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds ++*pos; 16691da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 16701da177e4SLinus Torvalds return ipmr_vif_seq_idx(iter, 0); 16711da177e4SLinus Torvalds 16721da177e4SLinus Torvalds while (++iter->ct < maxvif) { 16731da177e4SLinus Torvalds if (!VIF_EXISTS(iter->ct)) 16741da177e4SLinus Torvalds continue; 16751da177e4SLinus Torvalds return &vif_table[iter->ct]; 16761da177e4SLinus Torvalds } 16771da177e4SLinus Torvalds return NULL; 16781da177e4SLinus Torvalds } 16791da177e4SLinus Torvalds 16801da177e4SLinus Torvalds static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) 1681ba93ef74SStephen Hemminger __releases(mrt_lock) 16821da177e4SLinus Torvalds { 16831da177e4SLinus Torvalds read_unlock(&mrt_lock); 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds 16861da177e4SLinus Torvalds static int ipmr_vif_seq_show(struct seq_file *seq, void *v) 16871da177e4SLinus Torvalds { 16881da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 16891da177e4SLinus Torvalds seq_puts(seq, 16901da177e4SLinus Torvalds "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); 16911da177e4SLinus Torvalds } else { 16921da177e4SLinus Torvalds const struct vif_device *vif = v; 16931da177e4SLinus Torvalds const char *name = vif->dev ? vif->dev->name : "none"; 16941da177e4SLinus Torvalds 16951da177e4SLinus Torvalds seq_printf(seq, 16961da177e4SLinus Torvalds "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", 16971da177e4SLinus Torvalds vif - vif_table, 16981da177e4SLinus Torvalds name, vif->bytes_in, vif->pkt_in, 16991da177e4SLinus Torvalds vif->bytes_out, vif->pkt_out, 17001da177e4SLinus Torvalds vif->flags, vif->local, vif->remote); 17011da177e4SLinus Torvalds } 17021da177e4SLinus Torvalds return 0; 17031da177e4SLinus Torvalds } 17041da177e4SLinus Torvalds 1705f690808eSStephen Hemminger static const struct seq_operations ipmr_vif_seq_ops = { 17061da177e4SLinus Torvalds .start = ipmr_vif_seq_start, 17071da177e4SLinus Torvalds .next = ipmr_vif_seq_next, 17081da177e4SLinus Torvalds .stop = ipmr_vif_seq_stop, 17091da177e4SLinus Torvalds .show = ipmr_vif_seq_show, 17101da177e4SLinus Torvalds }; 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds static int ipmr_vif_open(struct inode *inode, struct file *file) 17131da177e4SLinus Torvalds { 1714cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_vif_seq_ops, 1715cf7732e4SPavel Emelyanov sizeof(struct ipmr_vif_iter)); 17161da177e4SLinus Torvalds } 17171da177e4SLinus Torvalds 17189a32144eSArjan van de Ven static const struct file_operations ipmr_vif_fops = { 17191da177e4SLinus Torvalds .owner = THIS_MODULE, 17201da177e4SLinus Torvalds .open = ipmr_vif_open, 17211da177e4SLinus Torvalds .read = seq_read, 17221da177e4SLinus Torvalds .llseek = seq_lseek, 17231da177e4SLinus Torvalds .release = seq_release_private, 17241da177e4SLinus Torvalds }; 17251da177e4SLinus Torvalds 17261da177e4SLinus Torvalds struct ipmr_mfc_iter { 17271da177e4SLinus Torvalds struct mfc_cache **cache; 17281da177e4SLinus Torvalds int ct; 17291da177e4SLinus Torvalds }; 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos) 17331da177e4SLinus Torvalds { 17341da177e4SLinus Torvalds struct mfc_cache *mfc; 17351da177e4SLinus Torvalds 17361da177e4SLinus Torvalds it->cache = mfc_cache_array; 17371da177e4SLinus Torvalds read_lock(&mrt_lock); 17381da177e4SLinus Torvalds for (it->ct = 0; it->ct < MFC_LINES; it->ct++) 17391da177e4SLinus Torvalds for (mfc = mfc_cache_array[it->ct]; mfc; mfc = mfc->next) 17401da177e4SLinus Torvalds if (pos-- == 0) 17411da177e4SLinus Torvalds return mfc; 17421da177e4SLinus Torvalds read_unlock(&mrt_lock); 17431da177e4SLinus Torvalds 17441da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17451da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17461da177e4SLinus Torvalds for (mfc = mfc_unres_queue; mfc; mfc = mfc->next) 17471da177e4SLinus Torvalds if (pos-- == 0) 17481da177e4SLinus Torvalds return mfc; 17491da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds it->cache = NULL; 17521da177e4SLinus Torvalds return NULL; 17531da177e4SLinus Torvalds } 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) 17571da177e4SLinus Torvalds { 17581da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17591da177e4SLinus Torvalds it->cache = NULL; 17601da177e4SLinus Torvalds it->ct = 0; 17611da177e4SLinus Torvalds return *pos ? ipmr_mfc_seq_idx(seq->private, *pos - 1) 17621da177e4SLinus Torvalds : SEQ_START_TOKEN; 17631da177e4SLinus Torvalds } 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) 17661da177e4SLinus Torvalds { 17671da177e4SLinus Torvalds struct mfc_cache *mfc = v; 17681da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds ++*pos; 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 17731da177e4SLinus Torvalds return ipmr_mfc_seq_idx(seq->private, 0); 17741da177e4SLinus Torvalds 17751da177e4SLinus Torvalds if (mfc->next) 17761da177e4SLinus Torvalds return mfc->next; 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 17791da177e4SLinus Torvalds goto end_of_list; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds BUG_ON(it->cache != mfc_cache_array); 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds while (++it->ct < MFC_LINES) { 17841da177e4SLinus Torvalds mfc = mfc_cache_array[it->ct]; 17851da177e4SLinus Torvalds if (mfc) 17861da177e4SLinus Torvalds return mfc; 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds /* exhausted cache_array, show unresolved */ 17901da177e4SLinus Torvalds read_unlock(&mrt_lock); 17911da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17921da177e4SLinus Torvalds it->ct = 0; 17931da177e4SLinus Torvalds 17941da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17951da177e4SLinus Torvalds mfc = mfc_unres_queue; 17961da177e4SLinus Torvalds if (mfc) 17971da177e4SLinus Torvalds return mfc; 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvalds end_of_list: 18001da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18011da177e4SLinus Torvalds it->cache = NULL; 18021da177e4SLinus Torvalds 18031da177e4SLinus Torvalds return NULL; 18041da177e4SLinus Torvalds } 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) 18071da177e4SLinus Torvalds { 18081da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 18111da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18121da177e4SLinus Torvalds else if (it->cache == mfc_cache_array) 18131da177e4SLinus Torvalds read_unlock(&mrt_lock); 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds 18161da177e4SLinus Torvalds static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) 18171da177e4SLinus Torvalds { 18181da177e4SLinus Torvalds int n; 18191da177e4SLinus Torvalds 18201da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 18211da177e4SLinus Torvalds seq_puts(seq, 18221da177e4SLinus Torvalds "Group Origin Iif Pkts Bytes Wrong Oifs\n"); 18231da177e4SLinus Torvalds } else { 18241da177e4SLinus Torvalds const struct mfc_cache *mfc = v; 18251da177e4SLinus Torvalds const struct ipmr_mfc_iter *it = seq->private; 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds seq_printf(seq, "%08lX %08lX %-3d %8ld %8ld %8ld", 18281da177e4SLinus Torvalds (unsigned long) mfc->mfc_mcastgrp, 18291da177e4SLinus Torvalds (unsigned long) mfc->mfc_origin, 18301da177e4SLinus Torvalds mfc->mfc_parent, 18311da177e4SLinus Torvalds mfc->mfc_un.res.pkt, 18321da177e4SLinus Torvalds mfc->mfc_un.res.bytes, 18331da177e4SLinus Torvalds mfc->mfc_un.res.wrong_if); 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds if (it->cache != &mfc_unres_queue) { 18361da177e4SLinus Torvalds for (n = mfc->mfc_un.res.minvif; 18371da177e4SLinus Torvalds n < mfc->mfc_un.res.maxvif; n++ ) { 18381da177e4SLinus Torvalds if (VIF_EXISTS(n) 18391da177e4SLinus Torvalds && mfc->mfc_un.res.ttls[n] < 255) 18401da177e4SLinus Torvalds seq_printf(seq, 18411da177e4SLinus Torvalds " %2d:%-3d", 18421da177e4SLinus Torvalds n, mfc->mfc_un.res.ttls[n]); 18431da177e4SLinus Torvalds } 18441da177e4SLinus Torvalds } 18451da177e4SLinus Torvalds seq_putc(seq, '\n'); 18461da177e4SLinus Torvalds } 18471da177e4SLinus Torvalds return 0; 18481da177e4SLinus Torvalds } 18491da177e4SLinus Torvalds 1850f690808eSStephen Hemminger static const struct seq_operations ipmr_mfc_seq_ops = { 18511da177e4SLinus Torvalds .start = ipmr_mfc_seq_start, 18521da177e4SLinus Torvalds .next = ipmr_mfc_seq_next, 18531da177e4SLinus Torvalds .stop = ipmr_mfc_seq_stop, 18541da177e4SLinus Torvalds .show = ipmr_mfc_seq_show, 18551da177e4SLinus Torvalds }; 18561da177e4SLinus Torvalds 18571da177e4SLinus Torvalds static int ipmr_mfc_open(struct inode *inode, struct file *file) 18581da177e4SLinus Torvalds { 1859cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_mfc_seq_ops, 1860cf7732e4SPavel Emelyanov sizeof(struct ipmr_mfc_iter)); 18611da177e4SLinus Torvalds } 18621da177e4SLinus Torvalds 18639a32144eSArjan van de Ven static const struct file_operations ipmr_mfc_fops = { 18641da177e4SLinus Torvalds .owner = THIS_MODULE, 18651da177e4SLinus Torvalds .open = ipmr_mfc_open, 18661da177e4SLinus Torvalds .read = seq_read, 18671da177e4SLinus Torvalds .llseek = seq_lseek, 18681da177e4SLinus Torvalds .release = seq_release_private, 18691da177e4SLinus Torvalds }; 18701da177e4SLinus Torvalds #endif 18711da177e4SLinus Torvalds 18721da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 18731da177e4SLinus Torvalds static struct net_protocol pim_protocol = { 18741da177e4SLinus Torvalds .handler = pim_rcv, 18751da177e4SLinus Torvalds }; 18761da177e4SLinus Torvalds #endif 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds /* 18801da177e4SLinus Torvalds * Setup for IP multicast routing 18811da177e4SLinus Torvalds */ 18821da177e4SLinus Torvalds 18831da177e4SLinus Torvalds void __init ip_mr_init(void) 18841da177e4SLinus Torvalds { 18851da177e4SLinus Torvalds mrt_cachep = kmem_cache_create("ip_mrt_cache", 18861da177e4SLinus Torvalds sizeof(struct mfc_cache), 1887e5d679f3SAlexey Dobriyan 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, 188820c2df83SPaul Mundt NULL); 1889b24b8a24SPavel Emelyanov setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0); 18901da177e4SLinus Torvalds register_netdevice_notifier(&ip_mr_notifier); 18911da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 1892457c4cbcSEric W. Biederman proc_net_fops_create(&init_net, "ip_mr_vif", 0, &ipmr_vif_fops); 1893457c4cbcSEric W. Biederman proc_net_fops_create(&init_net, "ip_mr_cache", 0, &ipmr_mfc_fops); 18941da177e4SLinus Torvalds #endif 18951da177e4SLinus Torvalds } 1896