11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * IP multicast routing support for mrouted 3.6/3.8 31da177e4SLinus Torvalds * 4113aa838SAlan Cox * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk> 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 * Fixes: 131da177e4SLinus Torvalds * Michael Chastain : Incorrect size of copying. 141da177e4SLinus Torvalds * Alan Cox : Added the cache manager code 151da177e4SLinus Torvalds * Alan Cox : Fixed the clone/copy bug and device race. 161da177e4SLinus Torvalds * Mike McLagan : Routing by source 171da177e4SLinus Torvalds * Malcolm Beattie : Buffer handling fixes. 181da177e4SLinus Torvalds * Alexey Kuznetsov : Double buffer free and other fixes. 191da177e4SLinus Torvalds * SVR Anand : Fixed several multicast bugs and problems. 201da177e4SLinus Torvalds * Alexey Kuznetsov : Status, optimisations and more. 211da177e4SLinus Torvalds * Brad Parker : Better behaviour on mrouted upcall 221da177e4SLinus Torvalds * overflow. 231da177e4SLinus Torvalds * Carlos Picoto : PIMv1 Support 241da177e4SLinus Torvalds * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header 251da177e4SLinus Torvalds * Relax this requrement to work with older peers. 261da177e4SLinus Torvalds * 271da177e4SLinus Torvalds */ 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #include <asm/system.h> 301da177e4SLinus Torvalds #include <asm/uaccess.h> 311da177e4SLinus Torvalds #include <linux/types.h> 324fc268d2SRandy Dunlap #include <linux/capability.h> 331da177e4SLinus Torvalds #include <linux/errno.h> 341da177e4SLinus Torvalds #include <linux/timer.h> 351da177e4SLinus Torvalds #include <linux/mm.h> 361da177e4SLinus Torvalds #include <linux/kernel.h> 371da177e4SLinus Torvalds #include <linux/fcntl.h> 381da177e4SLinus Torvalds #include <linux/stat.h> 391da177e4SLinus Torvalds #include <linux/socket.h> 401da177e4SLinus Torvalds #include <linux/in.h> 411da177e4SLinus Torvalds #include <linux/inet.h> 421da177e4SLinus Torvalds #include <linux/netdevice.h> 431da177e4SLinus Torvalds #include <linux/inetdevice.h> 441da177e4SLinus Torvalds #include <linux/igmp.h> 451da177e4SLinus Torvalds #include <linux/proc_fs.h> 461da177e4SLinus Torvalds #include <linux/seq_file.h> 471da177e4SLinus Torvalds #include <linux/mroute.h> 481da177e4SLinus Torvalds #include <linux/init.h> 4946f25dffSKris Katterjohn #include <linux/if_ether.h> 50457c4cbcSEric W. Biederman #include <net/net_namespace.h> 511da177e4SLinus Torvalds #include <net/ip.h> 521da177e4SLinus Torvalds #include <net/protocol.h> 531da177e4SLinus Torvalds #include <linux/skbuff.h> 5414c85021SArnaldo Carvalho de Melo #include <net/route.h> 551da177e4SLinus Torvalds #include <net/sock.h> 561da177e4SLinus Torvalds #include <net/icmp.h> 571da177e4SLinus Torvalds #include <net/udp.h> 581da177e4SLinus Torvalds #include <net/raw.h> 591da177e4SLinus Torvalds #include <linux/notifier.h> 601da177e4SLinus Torvalds #include <linux/if_arp.h> 611da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 621da177e4SLinus Torvalds #include <net/ipip.h> 631da177e4SLinus Torvalds #include <net/checksum.h> 64dc5fc579SArnaldo Carvalho de Melo #include <net/netlink.h> 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) 671da177e4SLinus Torvalds #define CONFIG_IP_PIMSM 1 681da177e4SLinus Torvalds #endif 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* Big lock, protecting vif table, mrt cache and mroute socket state. 711da177e4SLinus Torvalds Note that the changes are semaphored via rtnl_lock. 721da177e4SLinus Torvalds */ 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds static DEFINE_RWLOCK(mrt_lock); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds /* 771da177e4SLinus Torvalds * Multicast router control variables 781da177e4SLinus Torvalds */ 791da177e4SLinus Torvalds 80cf958ae3SBenjamin Thery #define VIF_EXISTS(_net, _idx) ((_net)->ipv4.vif_table[_idx].dev != NULL) 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds static int mroute_do_assert; /* Set in PIM assert */ 831da177e4SLinus Torvalds static int mroute_do_pim; 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds static struct mfc_cache *mfc_unres_queue; /* Queue of unresolved entries */ 861da177e4SLinus Torvalds static atomic_t cache_resolve_queue_len; /* Size of unresolved */ 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds /* Special spinlock for queue of unresolved entries */ 891da177e4SLinus Torvalds static DEFINE_SPINLOCK(mfc_unres_lock); 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds /* We return to original Alan's scheme. Hash table of resolved 921da177e4SLinus Torvalds entries is changed only in process context and protected 931da177e4SLinus Torvalds with weak lock mrt_lock. Queue of unresolved entries is protected 941da177e4SLinus Torvalds with strong spinlock mfc_unres_lock. 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds In this case data path is free of exclusive locks at all. 971da177e4SLinus Torvalds */ 981da177e4SLinus Torvalds 99e18b890bSChristoph Lameter static struct kmem_cache *mrt_cachep __read_mostly; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local); 1021da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert); 1031da177e4SLinus Torvalds static int ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm); 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 1061da177e4SLinus Torvalds static struct net_protocol pim_protocol; 1071da177e4SLinus Torvalds #endif 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static struct timer_list ipmr_expire_timer; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ 1121da177e4SLinus Torvalds 113d607032dSWang Chen static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) 114d607032dSWang Chen { 115d607032dSWang Chen dev_close(dev); 116d607032dSWang Chen 117d607032dSWang Chen dev = __dev_get_by_name(&init_net, "tunl0"); 118d607032dSWang Chen if (dev) { 1195bc3eb7eSStephen Hemminger const struct net_device_ops *ops = dev->netdev_ops; 120d607032dSWang Chen struct ifreq ifr; 121d607032dSWang Chen struct ip_tunnel_parm p; 122d607032dSWang Chen 123d607032dSWang Chen memset(&p, 0, sizeof(p)); 124d607032dSWang Chen p.iph.daddr = v->vifc_rmt_addr.s_addr; 125d607032dSWang Chen p.iph.saddr = v->vifc_lcl_addr.s_addr; 126d607032dSWang Chen p.iph.version = 4; 127d607032dSWang Chen p.iph.ihl = 5; 128d607032dSWang Chen p.iph.protocol = IPPROTO_IPIP; 129d607032dSWang Chen sprintf(p.name, "dvmrp%d", v->vifc_vifi); 130d607032dSWang Chen ifr.ifr_ifru.ifru_data = (__force void __user *)&p; 131d607032dSWang Chen 1325bc3eb7eSStephen Hemminger if (ops->ndo_do_ioctl) { 1335bc3eb7eSStephen Hemminger mm_segment_t oldfs = get_fs(); 1345bc3eb7eSStephen Hemminger 1355bc3eb7eSStephen Hemminger set_fs(KERNEL_DS); 1365bc3eb7eSStephen Hemminger ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); 137d607032dSWang Chen set_fs(oldfs); 138d607032dSWang Chen } 139d607032dSWang Chen } 1405bc3eb7eSStephen Hemminger } 141d607032dSWang Chen 1421da177e4SLinus Torvalds static 1431da177e4SLinus Torvalds struct net_device *ipmr_new_tunnel(struct vifctl *v) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds struct net_device *dev; 1461da177e4SLinus Torvalds 147881d966bSEric W. Biederman dev = __dev_get_by_name(&init_net, "tunl0"); 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds if (dev) { 1505bc3eb7eSStephen Hemminger const struct net_device_ops *ops = dev->netdev_ops; 1511da177e4SLinus Torvalds int err; 1521da177e4SLinus Torvalds struct ifreq ifr; 1531da177e4SLinus Torvalds struct ip_tunnel_parm p; 1541da177e4SLinus Torvalds struct in_device *in_dev; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds memset(&p, 0, sizeof(p)); 1571da177e4SLinus Torvalds p.iph.daddr = v->vifc_rmt_addr.s_addr; 1581da177e4SLinus Torvalds p.iph.saddr = v->vifc_lcl_addr.s_addr; 1591da177e4SLinus Torvalds p.iph.version = 4; 1601da177e4SLinus Torvalds p.iph.ihl = 5; 1611da177e4SLinus Torvalds p.iph.protocol = IPPROTO_IPIP; 1621da177e4SLinus Torvalds sprintf(p.name, "dvmrp%d", v->vifc_vifi); 163ba93ef74SStephen Hemminger ifr.ifr_ifru.ifru_data = (__force void __user *)&p; 1641da177e4SLinus Torvalds 1655bc3eb7eSStephen Hemminger if (ops->ndo_do_ioctl) { 1665bc3eb7eSStephen Hemminger mm_segment_t oldfs = get_fs(); 1675bc3eb7eSStephen Hemminger 1685bc3eb7eSStephen Hemminger set_fs(KERNEL_DS); 1695bc3eb7eSStephen Hemminger err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); 1701da177e4SLinus Torvalds set_fs(oldfs); 1715bc3eb7eSStephen Hemminger } else 1725bc3eb7eSStephen Hemminger err = -EOPNOTSUPP; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds dev = NULL; 1751da177e4SLinus Torvalds 176881d966bSEric W. Biederman if (err == 0 && (dev = __dev_get_by_name(&init_net, p.name)) != NULL) { 1771da177e4SLinus Torvalds dev->flags |= IFF_MULTICAST; 1781da177e4SLinus Torvalds 179e5ed6399SHerbert Xu in_dev = __in_dev_get_rtnl(dev); 18071e27da9SHerbert Xu if (in_dev == NULL) 1811da177e4SLinus Torvalds goto failure; 18271e27da9SHerbert Xu 18371e27da9SHerbert Xu ipv4_devconf_setall(in_dev); 18471e27da9SHerbert Xu IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds if (dev_open(dev)) 1871da177e4SLinus Torvalds goto failure; 1887dc00c82SWang Chen dev_hold(dev); 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds return dev; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds failure: 1941da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 1951da177e4SLinus Torvalds rtnl_unlock(); 1961da177e4SLinus Torvalds rtnl_lock(); 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds unregister_netdevice(dev); 1991da177e4SLinus Torvalds return NULL; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds static int reg_vif_num = -1; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds read_lock(&mrt_lock); 209cf3677aeSPavel Emelyanov dev->stats.tx_bytes += skb->len; 210cf3677aeSPavel Emelyanov dev->stats.tx_packets++; 2111da177e4SLinus Torvalds ipmr_cache_report(skb, reg_vif_num, IGMPMSG_WHOLEPKT); 2121da177e4SLinus Torvalds read_unlock(&mrt_lock); 2131da177e4SLinus Torvalds kfree_skb(skb); 2141da177e4SLinus Torvalds return 0; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 217007c3838SStephen Hemminger static const struct net_device_ops reg_vif_netdev_ops = { 218007c3838SStephen Hemminger .ndo_start_xmit = reg_vif_xmit, 219007c3838SStephen Hemminger }; 220007c3838SStephen Hemminger 2211da177e4SLinus Torvalds static void reg_vif_setup(struct net_device *dev) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds dev->type = ARPHRD_PIMREG; 22446f25dffSKris Katterjohn dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; 2251da177e4SLinus Torvalds dev->flags = IFF_NOARP; 226007c3838SStephen Hemminger dev->netdev_ops = ®_vif_netdev_ops, 2271da177e4SLinus Torvalds dev->destructor = free_netdev; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds static struct net_device *ipmr_reg_vif(void) 2311da177e4SLinus Torvalds { 2321da177e4SLinus Torvalds struct net_device *dev; 2331da177e4SLinus Torvalds struct in_device *in_dev; 2341da177e4SLinus Torvalds 235cf3677aeSPavel Emelyanov dev = alloc_netdev(0, "pimreg", reg_vif_setup); 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds if (dev == NULL) 2381da177e4SLinus Torvalds return NULL; 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds if (register_netdevice(dev)) { 2411da177e4SLinus Torvalds free_netdev(dev); 2421da177e4SLinus Torvalds return NULL; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds dev->iflink = 0; 2451da177e4SLinus Torvalds 24671e27da9SHerbert Xu rcu_read_lock(); 24771e27da9SHerbert Xu if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { 24871e27da9SHerbert Xu rcu_read_unlock(); 2491da177e4SLinus Torvalds goto failure; 25071e27da9SHerbert Xu } 2511da177e4SLinus Torvalds 25271e27da9SHerbert Xu ipv4_devconf_setall(in_dev); 25371e27da9SHerbert Xu IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; 25471e27da9SHerbert Xu rcu_read_unlock(); 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds if (dev_open(dev)) 2571da177e4SLinus Torvalds goto failure; 2581da177e4SLinus Torvalds 2597dc00c82SWang Chen dev_hold(dev); 2607dc00c82SWang Chen 2611da177e4SLinus Torvalds return dev; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds failure: 2641da177e4SLinus Torvalds /* allow the register to be completed before unregistering. */ 2651da177e4SLinus Torvalds rtnl_unlock(); 2661da177e4SLinus Torvalds rtnl_lock(); 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds unregister_netdevice(dev); 2691da177e4SLinus Torvalds return NULL; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds #endif 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds /* 2741da177e4SLinus Torvalds * Delete a VIF entry 2757dc00c82SWang Chen * @notify: Set to 1, if the caller is a notifier_call 2761da177e4SLinus Torvalds */ 2771da177e4SLinus Torvalds 2787dc00c82SWang Chen static int vif_delete(int vifi, int notify) 2791da177e4SLinus Torvalds { 2801da177e4SLinus Torvalds struct vif_device *v; 2811da177e4SLinus Torvalds struct net_device *dev; 2821da177e4SLinus Torvalds struct in_device *in_dev; 2831da177e4SLinus Torvalds 284cf958ae3SBenjamin Thery if (vifi < 0 || vifi >= init_net.ipv4.maxvif) 2851da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2861da177e4SLinus Torvalds 287cf958ae3SBenjamin Thery v = &init_net.ipv4.vif_table[vifi]; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 2901da177e4SLinus Torvalds dev = v->dev; 2911da177e4SLinus Torvalds v->dev = NULL; 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds if (!dev) { 2941da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 2951da177e4SLinus Torvalds return -EADDRNOTAVAIL; 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 2991da177e4SLinus Torvalds if (vifi == reg_vif_num) 3001da177e4SLinus Torvalds reg_vif_num = -1; 3011da177e4SLinus Torvalds #endif 3021da177e4SLinus Torvalds 303cf958ae3SBenjamin Thery if (vifi+1 == init_net.ipv4.maxvif) { 3041da177e4SLinus Torvalds int tmp; 3051da177e4SLinus Torvalds for (tmp=vifi-1; tmp>=0; tmp--) { 306cf958ae3SBenjamin Thery if (VIF_EXISTS(&init_net, tmp)) 3071da177e4SLinus Torvalds break; 3081da177e4SLinus Torvalds } 309cf958ae3SBenjamin Thery init_net.ipv4.maxvif = tmp+1; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds dev_set_allmulti(dev, -1); 3151da177e4SLinus Torvalds 316e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { 31742f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; 3181da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 3217dc00c82SWang Chen if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER) && !notify) 3221da177e4SLinus Torvalds unregister_netdevice(dev); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds dev_put(dev); 3251da177e4SLinus Torvalds return 0; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3285c0a66f5SBenjamin Thery static inline void ipmr_cache_free(struct mfc_cache *c) 3295c0a66f5SBenjamin Thery { 3305c0a66f5SBenjamin Thery release_net(mfc_net(c)); 3315c0a66f5SBenjamin Thery kmem_cache_free(mrt_cachep, c); 3325c0a66f5SBenjamin Thery } 3335c0a66f5SBenjamin Thery 3341da177e4SLinus Torvalds /* Destroy an unresolved cache entry, killing queued skbs 3351da177e4SLinus Torvalds and reporting error to netlink readers. 3361da177e4SLinus Torvalds */ 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds static void ipmr_destroy_unres(struct mfc_cache *c) 3391da177e4SLinus Torvalds { 3401da177e4SLinus Torvalds struct sk_buff *skb; 3419ef1d4c7SPatrick McHardy struct nlmsgerr *e; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds atomic_dec(&cache_resolve_queue_len); 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) { 346eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 3471da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 3481da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 3491da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 3501da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 3519ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 3529ef1d4c7SPatrick McHardy e->error = -ETIMEDOUT; 3539ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 3542942e900SThomas Graf 35597c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 3561da177e4SLinus Torvalds } else 3571da177e4SLinus Torvalds kfree_skb(skb); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3605c0a66f5SBenjamin Thery ipmr_cache_free(c); 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds /* Single timer process for all the unresolved queue. */ 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds static void ipmr_expire_process(unsigned long dummy) 3671da177e4SLinus Torvalds { 3681da177e4SLinus Torvalds unsigned long now; 3691da177e4SLinus Torvalds unsigned long expires; 3701da177e4SLinus Torvalds struct mfc_cache *c, **cp; 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds if (!spin_trylock(&mfc_unres_lock)) { 3731da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies+HZ/10); 3741da177e4SLinus Torvalds return; 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) == 0) 3781da177e4SLinus Torvalds goto out; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds now = jiffies; 3811da177e4SLinus Torvalds expires = 10*HZ; 3821da177e4SLinus Torvalds cp = &mfc_unres_queue; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds while ((c=*cp) != NULL) { 3851da177e4SLinus Torvalds if (time_after(c->mfc_un.unres.expires, now)) { 3861da177e4SLinus Torvalds unsigned long interval = c->mfc_un.unres.expires - now; 3871da177e4SLinus Torvalds if (interval < expires) 3881da177e4SLinus Torvalds expires = interval; 3891da177e4SLinus Torvalds cp = &c->next; 3901da177e4SLinus Torvalds continue; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds *cp = c->next; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds ipmr_destroy_unres(c); 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len)) 3991da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, jiffies + expires); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds out: 4021da177e4SLinus Torvalds spin_unlock(&mfc_unres_lock); 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds /* Fill oifs list. It is called under write locked mrt_lock. */ 4061da177e4SLinus Torvalds 407d1b04c08SBaruch Even static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls) 4081da177e4SLinus Torvalds { 4091da177e4SLinus Torvalds int vifi; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds cache->mfc_un.res.minvif = MAXVIFS; 4121da177e4SLinus Torvalds cache->mfc_un.res.maxvif = 0; 4131da177e4SLinus Torvalds memset(cache->mfc_un.res.ttls, 255, MAXVIFS); 4141da177e4SLinus Torvalds 415cf958ae3SBenjamin Thery for (vifi = 0; vifi < init_net.ipv4.maxvif; vifi++) { 416cf958ae3SBenjamin Thery if (VIF_EXISTS(&init_net, vifi) && 417cf958ae3SBenjamin Thery ttls[vifi] && ttls[vifi] < 255) { 4181da177e4SLinus Torvalds cache->mfc_un.res.ttls[vifi] = ttls[vifi]; 4191da177e4SLinus Torvalds if (cache->mfc_un.res.minvif > vifi) 4201da177e4SLinus Torvalds cache->mfc_un.res.minvif = vifi; 4211da177e4SLinus Torvalds if (cache->mfc_un.res.maxvif <= vifi) 4221da177e4SLinus Torvalds cache->mfc_un.res.maxvif = vifi + 1; 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds static int vif_add(struct vifctl *vifc, int mrtsock) 4281da177e4SLinus Torvalds { 4291da177e4SLinus Torvalds int vifi = vifc->vifc_vifi; 430cf958ae3SBenjamin Thery struct vif_device *v = &init_net.ipv4.vif_table[vifi]; 4311da177e4SLinus Torvalds struct net_device *dev; 4321da177e4SLinus Torvalds struct in_device *in_dev; 433d607032dSWang Chen int err; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds /* Is vif busy ? */ 436cf958ae3SBenjamin Thery if (VIF_EXISTS(&init_net, vifi)) 4371da177e4SLinus Torvalds return -EADDRINUSE; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds switch (vifc->vifc_flags) { 4401da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 4411da177e4SLinus Torvalds case VIFF_REGISTER: 4421da177e4SLinus Torvalds /* 4431da177e4SLinus Torvalds * Special Purpose VIF in PIM 4441da177e4SLinus Torvalds * All the packets will be sent to the daemon 4451da177e4SLinus Torvalds */ 4461da177e4SLinus Torvalds if (reg_vif_num >= 0) 4471da177e4SLinus Torvalds return -EADDRINUSE; 4481da177e4SLinus Torvalds dev = ipmr_reg_vif(); 4491da177e4SLinus Torvalds if (!dev) 4501da177e4SLinus Torvalds return -ENOBUFS; 451d607032dSWang Chen err = dev_set_allmulti(dev, 1); 452d607032dSWang Chen if (err) { 453d607032dSWang Chen unregister_netdevice(dev); 4547dc00c82SWang Chen dev_put(dev); 455d607032dSWang Chen return err; 456d607032dSWang Chen } 4571da177e4SLinus Torvalds break; 4581da177e4SLinus Torvalds #endif 4591da177e4SLinus Torvalds case VIFF_TUNNEL: 4601da177e4SLinus Torvalds dev = ipmr_new_tunnel(vifc); 4611da177e4SLinus Torvalds if (!dev) 4621da177e4SLinus Torvalds return -ENOBUFS; 463d607032dSWang Chen err = dev_set_allmulti(dev, 1); 464d607032dSWang Chen if (err) { 465d607032dSWang Chen ipmr_del_tunnel(dev, vifc); 4667dc00c82SWang Chen dev_put(dev); 467d607032dSWang Chen return err; 468d607032dSWang Chen } 4691da177e4SLinus Torvalds break; 4701da177e4SLinus Torvalds case 0: 4711ab35276SDenis V. Lunev dev = ip_dev_find(&init_net, vifc->vifc_lcl_addr.s_addr); 4721da177e4SLinus Torvalds if (!dev) 4731da177e4SLinus Torvalds return -EADDRNOTAVAIL; 474d607032dSWang Chen err = dev_set_allmulti(dev, 1); 4757dc00c82SWang Chen if (err) { 4767dc00c82SWang Chen dev_put(dev); 477d607032dSWang Chen return err; 4787dc00c82SWang Chen } 4791da177e4SLinus Torvalds break; 4801da177e4SLinus Torvalds default: 4811da177e4SLinus Torvalds return -EINVAL; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 484e5ed6399SHerbert Xu if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) 4851da177e4SLinus Torvalds return -EADDRNOTAVAIL; 48642f811b8SHerbert Xu IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; 4871da177e4SLinus Torvalds ip_rt_multicast_event(in_dev); 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* 4901da177e4SLinus Torvalds * Fill in the VIF structures 4911da177e4SLinus Torvalds */ 4921da177e4SLinus Torvalds v->rate_limit = vifc->vifc_rate_limit; 4931da177e4SLinus Torvalds v->local = vifc->vifc_lcl_addr.s_addr; 4941da177e4SLinus Torvalds v->remote = vifc->vifc_rmt_addr.s_addr; 4951da177e4SLinus Torvalds v->flags = vifc->vifc_flags; 4961da177e4SLinus Torvalds if (!mrtsock) 4971da177e4SLinus Torvalds v->flags |= VIFF_STATIC; 4981da177e4SLinus Torvalds v->threshold = vifc->vifc_threshold; 4991da177e4SLinus Torvalds v->bytes_in = 0; 5001da177e4SLinus Torvalds v->bytes_out = 0; 5011da177e4SLinus Torvalds v->pkt_in = 0; 5021da177e4SLinus Torvalds v->pkt_out = 0; 5031da177e4SLinus Torvalds v->link = dev->ifindex; 5041da177e4SLinus Torvalds if (v->flags&(VIFF_TUNNEL|VIFF_REGISTER)) 5051da177e4SLinus Torvalds v->link = dev->iflink; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds /* And finish update writing critical data */ 5081da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 5091da177e4SLinus Torvalds v->dev = dev; 5101da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 5111da177e4SLinus Torvalds if (v->flags&VIFF_REGISTER) 5121da177e4SLinus Torvalds reg_vif_num = vifi; 5131da177e4SLinus Torvalds #endif 514cf958ae3SBenjamin Thery if (vifi+1 > init_net.ipv4.maxvif) 515cf958ae3SBenjamin Thery init_net.ipv4.maxvif = vifi+1; 5161da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 5171da177e4SLinus Torvalds return 0; 5181da177e4SLinus Torvalds } 5191da177e4SLinus Torvalds 520114c7844SAl Viro static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp) 5211da177e4SLinus Torvalds { 5221da177e4SLinus Torvalds int line = MFC_HASH(mcastgrp, origin); 5231da177e4SLinus Torvalds struct mfc_cache *c; 5241da177e4SLinus Torvalds 525*2bb8b26cSBenjamin Thery for (c = init_net.ipv4.mfc_cache_array[line]; c; c = c->next) { 5261da177e4SLinus Torvalds if (c->mfc_origin==origin && c->mfc_mcastgrp==mcastgrp) 5271da177e4SLinus Torvalds break; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds return c; 5301da177e4SLinus Torvalds } 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* 5331da177e4SLinus Torvalds * Allocate a multicast cache entry 5341da177e4SLinus Torvalds */ 5355c0a66f5SBenjamin Thery static struct mfc_cache *ipmr_cache_alloc(struct net *net) 5361da177e4SLinus Torvalds { 537c3762229SRobert P. J. Day struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); 5381da177e4SLinus Torvalds if (c == NULL) 5391da177e4SLinus Torvalds return NULL; 5401da177e4SLinus Torvalds c->mfc_un.res.minvif = MAXVIFS; 5415c0a66f5SBenjamin Thery mfc_net_set(c, net); 5421da177e4SLinus Torvalds return c; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5455c0a66f5SBenjamin Thery static struct mfc_cache *ipmr_cache_alloc_unres(struct net *net) 5461da177e4SLinus Torvalds { 547c3762229SRobert P. J. Day struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); 5481da177e4SLinus Torvalds if (c == NULL) 5491da177e4SLinus Torvalds return NULL; 5501da177e4SLinus Torvalds skb_queue_head_init(&c->mfc_un.unres.unresolved); 5511da177e4SLinus Torvalds c->mfc_un.unres.expires = jiffies + 10*HZ; 5525c0a66f5SBenjamin Thery mfc_net_set(c, net); 5531da177e4SLinus Torvalds return c; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds /* 5571da177e4SLinus Torvalds * A cache entry has gone into a resolved state from queued 5581da177e4SLinus Torvalds */ 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) 5611da177e4SLinus Torvalds { 5621da177e4SLinus Torvalds struct sk_buff *skb; 5639ef1d4c7SPatrick McHardy struct nlmsgerr *e; 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds /* 5661da177e4SLinus Torvalds * Play the pending entries through our router 5671da177e4SLinus Torvalds */ 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { 570eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->version == 0) { 5711da177e4SLinus Torvalds struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds if (ipmr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) { 57427a884dcSArnaldo Carvalho de Melo nlh->nlmsg_len = (skb_tail_pointer(skb) - 57527a884dcSArnaldo Carvalho de Melo (u8 *)nlh); 5761da177e4SLinus Torvalds } else { 5771da177e4SLinus Torvalds nlh->nlmsg_type = NLMSG_ERROR; 5781da177e4SLinus Torvalds nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); 5791da177e4SLinus Torvalds skb_trim(skb, nlh->nlmsg_len); 5809ef1d4c7SPatrick McHardy e = NLMSG_DATA(nlh); 5819ef1d4c7SPatrick McHardy e->error = -EMSGSIZE; 5829ef1d4c7SPatrick McHardy memset(&e->msg, 0, sizeof(e->msg)); 5831da177e4SLinus Torvalds } 5842942e900SThomas Graf 58597c53cacSDenis V. Lunev rtnl_unicast(skb, &init_net, NETLINK_CB(skb).pid); 5861da177e4SLinus Torvalds } else 5871da177e4SLinus Torvalds ip_mr_forward(skb, c, 0); 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds /* 5921da177e4SLinus Torvalds * Bounce a cache query up to mrouted. We could use netlink for this but mrouted 5931da177e4SLinus Torvalds * expects the following bizarre scheme. 5941da177e4SLinus Torvalds * 5951da177e4SLinus Torvalds * Called under mrt_lock. 5961da177e4SLinus Torvalds */ 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert) 5991da177e4SLinus Torvalds { 6001da177e4SLinus Torvalds struct sk_buff *skb; 601c9bdd4b5SArnaldo Carvalho de Melo const int ihl = ip_hdrlen(pkt); 6021da177e4SLinus Torvalds struct igmphdr *igmp; 6031da177e4SLinus Torvalds struct igmpmsg *msg; 6041da177e4SLinus Torvalds int ret; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 6071da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) 6081da177e4SLinus Torvalds skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); 6091da177e4SLinus Torvalds else 6101da177e4SLinus Torvalds #endif 6111da177e4SLinus Torvalds skb = alloc_skb(128, GFP_ATOMIC); 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds if (!skb) 6141da177e4SLinus Torvalds return -ENOBUFS; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 6171da177e4SLinus Torvalds if (assert == IGMPMSG_WHOLEPKT) { 6181da177e4SLinus Torvalds /* Ugly, but we have no choice with this interface. 6191da177e4SLinus Torvalds Duplicate old header, fix ihl, length etc. 6201da177e4SLinus Torvalds And all this only to mangle msg->im_msgtype and 6211da177e4SLinus Torvalds to set msg->im_mbz to "mbz" :-) 6221da177e4SLinus Torvalds */ 623878c8145SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 624878c8145SArnaldo Carvalho de Melo skb_reset_network_header(skb); 625badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 6260272ffc4SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 627d56f90a7SArnaldo Carvalho de Melo memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); 6281da177e4SLinus Torvalds msg->im_msgtype = IGMPMSG_WHOLEPKT; 6291da177e4SLinus Torvalds msg->im_mbz = 0; 6301da177e4SLinus Torvalds msg->im_vif = reg_vif_num; 631eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; 632eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + 633eddc9ec5SArnaldo Carvalho de Melo sizeof(struct iphdr)); 6341da177e4SLinus Torvalds } else 6351da177e4SLinus Torvalds #endif 6361da177e4SLinus Torvalds { 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds /* 6391da177e4SLinus Torvalds * Copy the IP header 6401da177e4SLinus Torvalds */ 6411da177e4SLinus Torvalds 64227a884dcSArnaldo Carvalho de Melo skb->network_header = skb->tail; 643ddc7b8e3SArnaldo Carvalho de Melo skb_put(skb, ihl); 64427d7ff46SArnaldo Carvalho de Melo skb_copy_to_linear_data(skb, pkt->data, ihl); 645eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->protocol = 0; /* Flag to the kernel this is a route add */ 646eddc9ec5SArnaldo Carvalho de Melo msg = (struct igmpmsg *)skb_network_header(skb); 6471da177e4SLinus Torvalds msg->im_vif = vifi; 6481da177e4SLinus Torvalds skb->dst = dst_clone(pkt->dst); 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds /* 6511da177e4SLinus Torvalds * Add our header 6521da177e4SLinus Torvalds */ 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds igmp=(struct igmphdr *)skb_put(skb, sizeof(struct igmphdr)); 6551da177e4SLinus Torvalds igmp->type = 6561da177e4SLinus Torvalds msg->im_msgtype = assert; 6571da177e4SLinus Torvalds igmp->code = 0; 658eddc9ec5SArnaldo Carvalho de Melo ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ 659b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 66270a269e6SBenjamin Thery if (init_net.ipv4.mroute_sk == NULL) { 6631da177e4SLinus Torvalds kfree_skb(skb); 6641da177e4SLinus Torvalds return -EINVAL; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* 6681da177e4SLinus Torvalds * Deliver to mrouted 6691da177e4SLinus Torvalds */ 67070a269e6SBenjamin Thery ret = sock_queue_rcv_skb(init_net.ipv4.mroute_sk, skb); 67170a269e6SBenjamin Thery if (ret < 0) { 6721da177e4SLinus Torvalds if (net_ratelimit()) 6731da177e4SLinus Torvalds printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n"); 6741da177e4SLinus Torvalds kfree_skb(skb); 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds return ret; 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds /* 6811da177e4SLinus Torvalds * Queue a packet for resolution. It gets locked cache entry! 6821da177e4SLinus Torvalds */ 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds static int 6851da177e4SLinus Torvalds ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb) 6861da177e4SLinus Torvalds { 6871da177e4SLinus Torvalds int err; 6881da177e4SLinus Torvalds struct mfc_cache *c; 689eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 6921da177e4SLinus Torvalds for (c=mfc_unres_queue; c; c=c->next) { 693eddc9ec5SArnaldo Carvalho de Melo if (c->mfc_mcastgrp == iph->daddr && 694eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin == iph->saddr) 6951da177e4SLinus Torvalds break; 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds if (c == NULL) { 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * Create a new entry if allowable 7011da177e4SLinus Torvalds */ 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) >= 10 || 7045c0a66f5SBenjamin Thery (c = ipmr_cache_alloc_unres(&init_net)) == NULL) { 7051da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds kfree_skb(skb); 7081da177e4SLinus Torvalds return -ENOBUFS; 7091da177e4SLinus Torvalds } 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds /* 7121da177e4SLinus Torvalds * Fill in the new cache entry 7131da177e4SLinus Torvalds */ 7141da177e4SLinus Torvalds c->mfc_parent = -1; 715eddc9ec5SArnaldo Carvalho de Melo c->mfc_origin = iph->saddr; 716eddc9ec5SArnaldo Carvalho de Melo c->mfc_mcastgrp = iph->daddr; 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds /* 7191da177e4SLinus Torvalds * Reflect first query at mrouted. 7201da177e4SLinus Torvalds */ 7211da177e4SLinus Torvalds if ((err = ipmr_cache_report(skb, vifi, IGMPMSG_NOCACHE))<0) { 7221da177e4SLinus Torvalds /* If the report failed throw the cache entry 7231da177e4SLinus Torvalds out - Brad Parker 7241da177e4SLinus Torvalds */ 7251da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7261da177e4SLinus Torvalds 7275c0a66f5SBenjamin Thery ipmr_cache_free(c); 7281da177e4SLinus Torvalds kfree_skb(skb); 7291da177e4SLinus Torvalds return err; 7301da177e4SLinus Torvalds } 7311da177e4SLinus Torvalds 7321da177e4SLinus Torvalds atomic_inc(&cache_resolve_queue_len); 7331da177e4SLinus Torvalds c->next = mfc_unres_queue; 7341da177e4SLinus Torvalds mfc_unres_queue = c; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires); 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds /* 7401da177e4SLinus Torvalds * See if we can append the packet 7411da177e4SLinus Torvalds */ 7421da177e4SLinus Torvalds if (c->mfc_un.unres.unresolved.qlen>3) { 7431da177e4SLinus Torvalds kfree_skb(skb); 7441da177e4SLinus Torvalds err = -ENOBUFS; 7451da177e4SLinus Torvalds } else { 7461da177e4SLinus Torvalds skb_queue_tail(&c->mfc_un.unres.unresolved, skb); 7471da177e4SLinus Torvalds err = 0; 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 7511da177e4SLinus Torvalds return err; 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds /* 7551da177e4SLinus Torvalds * MFC cache manipulation by user space mroute daemon 7561da177e4SLinus Torvalds */ 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds static int ipmr_mfc_delete(struct mfcctl *mfc) 7591da177e4SLinus Torvalds { 7601da177e4SLinus Torvalds int line; 7611da177e4SLinus Torvalds struct mfc_cache *c, **cp; 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7641da177e4SLinus Torvalds 765*2bb8b26cSBenjamin Thery for (cp = &init_net.ipv4.mfc_cache_array[line]; 766*2bb8b26cSBenjamin Thery (c = *cp) != NULL; cp = &c->next) { 7671da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7681da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) { 7691da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7701da177e4SLinus Torvalds *cp = c->next; 7711da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 7721da177e4SLinus Torvalds 7735c0a66f5SBenjamin Thery ipmr_cache_free(c); 7741da177e4SLinus Torvalds return 0; 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds return -ENOENT; 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvalds static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock) 7811da177e4SLinus Torvalds { 7821da177e4SLinus Torvalds int line; 7831da177e4SLinus Torvalds struct mfc_cache *uc, *c, **cp; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); 7861da177e4SLinus Torvalds 787*2bb8b26cSBenjamin Thery for (cp = &init_net.ipv4.mfc_cache_array[line]; 788*2bb8b26cSBenjamin Thery (c = *cp) != NULL; cp = &c->next) { 7891da177e4SLinus Torvalds if (c->mfc_origin == mfc->mfcc_origin.s_addr && 7901da177e4SLinus Torvalds c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr) 7911da177e4SLinus Torvalds break; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds if (c != NULL) { 7951da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 7961da177e4SLinus Torvalds c->mfc_parent = mfc->mfcc_parent; 797d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 7981da177e4SLinus Torvalds if (!mrtsock) 7991da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 8001da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8011da177e4SLinus Torvalds return 0; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 804f97c1e0cSJoe Perches if (!ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) 8051da177e4SLinus Torvalds return -EINVAL; 8061da177e4SLinus Torvalds 8075c0a66f5SBenjamin Thery c = ipmr_cache_alloc(&init_net); 8081da177e4SLinus Torvalds if (c == NULL) 8091da177e4SLinus Torvalds return -ENOMEM; 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds c->mfc_origin = mfc->mfcc_origin.s_addr; 8121da177e4SLinus Torvalds c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; 8131da177e4SLinus Torvalds c->mfc_parent = mfc->mfcc_parent; 814d1b04c08SBaruch Even ipmr_update_thresholds(c, mfc->mfcc_ttls); 8151da177e4SLinus Torvalds if (!mrtsock) 8161da177e4SLinus Torvalds c->mfc_flags |= MFC_STATIC; 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 819*2bb8b26cSBenjamin Thery c->next = init_net.ipv4.mfc_cache_array[line]; 820*2bb8b26cSBenjamin Thery init_net.ipv4.mfc_cache_array[line] = c; 8211da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds /* 8241da177e4SLinus Torvalds * Check to see if we resolved a queued list. If so we 8251da177e4SLinus Torvalds * need to send on the frames and tidy up. 8261da177e4SLinus Torvalds */ 8271da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8281da177e4SLinus Torvalds for (cp = &mfc_unres_queue; (uc=*cp) != NULL; 8291da177e4SLinus Torvalds cp = &uc->next) { 8301da177e4SLinus Torvalds if (uc->mfc_origin == c->mfc_origin && 8311da177e4SLinus Torvalds uc->mfc_mcastgrp == c->mfc_mcastgrp) { 8321da177e4SLinus Torvalds *cp = uc->next; 8331da177e4SLinus Torvalds if (atomic_dec_and_test(&cache_resolve_queue_len)) 8341da177e4SLinus Torvalds del_timer(&ipmr_expire_timer); 8351da177e4SLinus Torvalds break; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds if (uc) { 8411da177e4SLinus Torvalds ipmr_cache_resolve(uc, c); 8425c0a66f5SBenjamin Thery ipmr_cache_free(uc); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds return 0; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds /* 8481da177e4SLinus Torvalds * Close the multicast socket, and clear the vif tables etc 8491da177e4SLinus Torvalds */ 8501da177e4SLinus Torvalds 8511da177e4SLinus Torvalds static void mroute_clean_tables(struct sock *sk) 8521da177e4SLinus Torvalds { 8531da177e4SLinus Torvalds int i; 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds /* 8561da177e4SLinus Torvalds * Shut down all active vif entries 8571da177e4SLinus Torvalds */ 858cf958ae3SBenjamin Thery for (i = 0; i < init_net.ipv4.maxvif; i++) { 859cf958ae3SBenjamin Thery if (!(init_net.ipv4.vif_table[i].flags&VIFF_STATIC)) 8607dc00c82SWang Chen vif_delete(i, 0); 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds /* 8641da177e4SLinus Torvalds * Wipe the cache 8651da177e4SLinus Torvalds */ 8661da177e4SLinus Torvalds for (i=0; i<MFC_LINES; i++) { 8671da177e4SLinus Torvalds struct mfc_cache *c, **cp; 8681da177e4SLinus Torvalds 869*2bb8b26cSBenjamin Thery cp = &init_net.ipv4.mfc_cache_array[i]; 8701da177e4SLinus Torvalds while ((c = *cp) != NULL) { 8711da177e4SLinus Torvalds if (c->mfc_flags&MFC_STATIC) { 8721da177e4SLinus Torvalds cp = &c->next; 8731da177e4SLinus Torvalds continue; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 8761da177e4SLinus Torvalds *cp = c->next; 8771da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 8781da177e4SLinus Torvalds 8795c0a66f5SBenjamin Thery ipmr_cache_free(c); 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds if (atomic_read(&cache_resolve_queue_len) != 0) { 8841da177e4SLinus Torvalds struct mfc_cache *c; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8871da177e4SLinus Torvalds while (mfc_unres_queue != NULL) { 8881da177e4SLinus Torvalds c = mfc_unres_queue; 8891da177e4SLinus Torvalds mfc_unres_queue = c->next; 8901da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds ipmr_destroy_unres(c); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds static void mrtsock_destruct(struct sock *sk) 9011da177e4SLinus Torvalds { 9021da177e4SLinus Torvalds rtnl_lock(); 90370a269e6SBenjamin Thery if (sk == init_net.ipv4.mroute_sk) { 9043b1e0a65SYOSHIFUJI Hideaki IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)--; 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 90770a269e6SBenjamin Thery init_net.ipv4.mroute_sk = NULL; 9081da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds mroute_clean_tables(sk); 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds rtnl_unlock(); 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds /* 9161da177e4SLinus Torvalds * Socket options and virtual interface manipulation. The whole 9171da177e4SLinus Torvalds * virtual interface system is a complete heap, but unfortunately 9181da177e4SLinus Torvalds * that's how BSD mrouted happens to think. Maybe one day with a proper 9191da177e4SLinus Torvalds * MOSPF/PIM router set up we can clean this up. 9201da177e4SLinus Torvalds */ 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int optlen) 9231da177e4SLinus Torvalds { 9241da177e4SLinus Torvalds int ret; 9251da177e4SLinus Torvalds struct vifctl vif; 9261da177e4SLinus Torvalds struct mfcctl mfc; 9271da177e4SLinus Torvalds 928132adf54SStephen Hemminger if (optname != MRT_INIT) { 92970a269e6SBenjamin Thery if (sk != init_net.ipv4.mroute_sk && !capable(CAP_NET_ADMIN)) 9301da177e4SLinus Torvalds return -EACCES; 9311da177e4SLinus Torvalds } 9321da177e4SLinus Torvalds 933132adf54SStephen Hemminger switch (optname) { 9341da177e4SLinus Torvalds case MRT_INIT: 9351da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || 9361da177e4SLinus Torvalds inet_sk(sk)->num != IPPROTO_IGMP) 9371da177e4SLinus Torvalds return -EOPNOTSUPP; 9381da177e4SLinus Torvalds if (optlen != sizeof(int)) 9391da177e4SLinus Torvalds return -ENOPROTOOPT; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds rtnl_lock(); 94270a269e6SBenjamin Thery if (init_net.ipv4.mroute_sk) { 9431da177e4SLinus Torvalds rtnl_unlock(); 9441da177e4SLinus Torvalds return -EADDRINUSE; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds 9471da177e4SLinus Torvalds ret = ip_ra_control(sk, 1, mrtsock_destruct); 9481da177e4SLinus Torvalds if (ret == 0) { 9491da177e4SLinus Torvalds write_lock_bh(&mrt_lock); 95070a269e6SBenjamin Thery init_net.ipv4.mroute_sk = sk; 9511da177e4SLinus Torvalds write_unlock_bh(&mrt_lock); 9521da177e4SLinus Torvalds 9533b1e0a65SYOSHIFUJI Hideaki IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)++; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds rtnl_unlock(); 9561da177e4SLinus Torvalds return ret; 9571da177e4SLinus Torvalds case MRT_DONE: 95870a269e6SBenjamin Thery if (sk != init_net.ipv4.mroute_sk) 9591da177e4SLinus Torvalds return -EACCES; 9601da177e4SLinus Torvalds return ip_ra_control(sk, 0, NULL); 9611da177e4SLinus Torvalds case MRT_ADD_VIF: 9621da177e4SLinus Torvalds case MRT_DEL_VIF: 9631da177e4SLinus Torvalds if (optlen != sizeof(vif)) 9641da177e4SLinus Torvalds return -EINVAL; 9651da177e4SLinus Torvalds if (copy_from_user(&vif, optval, sizeof(vif))) 9661da177e4SLinus Torvalds return -EFAULT; 9671da177e4SLinus Torvalds if (vif.vifc_vifi >= MAXVIFS) 9681da177e4SLinus Torvalds return -ENFILE; 9691da177e4SLinus Torvalds rtnl_lock(); 9701da177e4SLinus Torvalds if (optname == MRT_ADD_VIF) { 97170a269e6SBenjamin Thery ret = vif_add(&vif, sk == init_net.ipv4.mroute_sk); 9721da177e4SLinus Torvalds } else { 9737dc00c82SWang Chen ret = vif_delete(vif.vifc_vifi, 0); 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds rtnl_unlock(); 9761da177e4SLinus Torvalds return ret; 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds /* 9791da177e4SLinus Torvalds * Manipulate the forwarding caches. These live 9801da177e4SLinus Torvalds * in a sort of kernel/user symbiosis. 9811da177e4SLinus Torvalds */ 9821da177e4SLinus Torvalds case MRT_ADD_MFC: 9831da177e4SLinus Torvalds case MRT_DEL_MFC: 9841da177e4SLinus Torvalds if (optlen != sizeof(mfc)) 9851da177e4SLinus Torvalds return -EINVAL; 9861da177e4SLinus Torvalds if (copy_from_user(&mfc, optval, sizeof(mfc))) 9871da177e4SLinus Torvalds return -EFAULT; 9881da177e4SLinus Torvalds rtnl_lock(); 9891da177e4SLinus Torvalds if (optname == MRT_DEL_MFC) 9901da177e4SLinus Torvalds ret = ipmr_mfc_delete(&mfc); 9911da177e4SLinus Torvalds else 99270a269e6SBenjamin Thery ret = ipmr_mfc_add(&mfc, sk == init_net.ipv4.mroute_sk); 9931da177e4SLinus Torvalds rtnl_unlock(); 9941da177e4SLinus Torvalds return ret; 9951da177e4SLinus Torvalds /* 9961da177e4SLinus Torvalds * Control PIM assert. 9971da177e4SLinus Torvalds */ 9981da177e4SLinus Torvalds case MRT_ASSERT: 9991da177e4SLinus Torvalds { 10001da177e4SLinus Torvalds int v; 10011da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 10021da177e4SLinus Torvalds return -EFAULT; 10031da177e4SLinus Torvalds mroute_do_assert=(v)?1:0; 10041da177e4SLinus Torvalds return 0; 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10071da177e4SLinus Torvalds case MRT_PIM: 10081da177e4SLinus Torvalds { 1009ba93ef74SStephen Hemminger int v; 1010ba93ef74SStephen Hemminger 10111da177e4SLinus Torvalds if (get_user(v,(int __user *)optval)) 10121da177e4SLinus Torvalds return -EFAULT; 10131da177e4SLinus Torvalds v = (v) ? 1 : 0; 1014ba93ef74SStephen Hemminger 10151da177e4SLinus Torvalds rtnl_lock(); 10161da177e4SLinus Torvalds ret = 0; 10171da177e4SLinus Torvalds if (v != mroute_do_pim) { 10181da177e4SLinus Torvalds mroute_do_pim = v; 10191da177e4SLinus Torvalds mroute_do_assert = v; 10201da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 10211da177e4SLinus Torvalds if (mroute_do_pim) 10221da177e4SLinus Torvalds ret = inet_add_protocol(&pim_protocol, 10231da177e4SLinus Torvalds IPPROTO_PIM); 10241da177e4SLinus Torvalds else 10251da177e4SLinus Torvalds ret = inet_del_protocol(&pim_protocol, 10261da177e4SLinus Torvalds IPPROTO_PIM); 10271da177e4SLinus Torvalds if (ret < 0) 10281da177e4SLinus Torvalds ret = -EAGAIN; 10291da177e4SLinus Torvalds #endif 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds rtnl_unlock(); 10321da177e4SLinus Torvalds return ret; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds #endif 10351da177e4SLinus Torvalds /* 10361da177e4SLinus Torvalds * Spurious command, or MRT_VERSION which you cannot 10371da177e4SLinus Torvalds * set. 10381da177e4SLinus Torvalds */ 10391da177e4SLinus Torvalds default: 10401da177e4SLinus Torvalds return -ENOPROTOOPT; 10411da177e4SLinus Torvalds } 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds /* 10451da177e4SLinus Torvalds * Getsock opt support for the multicast routing system. 10461da177e4SLinus Torvalds */ 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) 10491da177e4SLinus Torvalds { 10501da177e4SLinus Torvalds int olr; 10511da177e4SLinus Torvalds int val; 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds if (optname != MRT_VERSION && 10541da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10551da177e4SLinus Torvalds optname!=MRT_PIM && 10561da177e4SLinus Torvalds #endif 10571da177e4SLinus Torvalds optname!=MRT_ASSERT) 10581da177e4SLinus Torvalds return -ENOPROTOOPT; 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds if (get_user(olr, optlen)) 10611da177e4SLinus Torvalds return -EFAULT; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds olr = min_t(unsigned int, olr, sizeof(int)); 10641da177e4SLinus Torvalds if (olr < 0) 10651da177e4SLinus Torvalds return -EINVAL; 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds if (put_user(olr, optlen)) 10681da177e4SLinus Torvalds return -EFAULT; 10691da177e4SLinus Torvalds if (optname == MRT_VERSION) 10701da177e4SLinus Torvalds val = 0x0305; 10711da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 10721da177e4SLinus Torvalds else if (optname == MRT_PIM) 10731da177e4SLinus Torvalds val = mroute_do_pim; 10741da177e4SLinus Torvalds #endif 10751da177e4SLinus Torvalds else 10761da177e4SLinus Torvalds val = mroute_do_assert; 10771da177e4SLinus Torvalds if (copy_to_user(optval, &val, olr)) 10781da177e4SLinus Torvalds return -EFAULT; 10791da177e4SLinus Torvalds return 0; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds /* 10831da177e4SLinus Torvalds * The IP multicast ioctl support routines. 10841da177e4SLinus Torvalds */ 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 10871da177e4SLinus Torvalds { 10881da177e4SLinus Torvalds struct sioc_sg_req sr; 10891da177e4SLinus Torvalds struct sioc_vif_req vr; 10901da177e4SLinus Torvalds struct vif_device *vif; 10911da177e4SLinus Torvalds struct mfc_cache *c; 10921da177e4SLinus Torvalds 1093132adf54SStephen Hemminger switch (cmd) { 10941da177e4SLinus Torvalds case SIOCGETVIFCNT: 10951da177e4SLinus Torvalds if (copy_from_user(&vr, arg, sizeof(vr))) 10961da177e4SLinus Torvalds return -EFAULT; 1097cf958ae3SBenjamin Thery if (vr.vifi >= init_net.ipv4.maxvif) 10981da177e4SLinus Torvalds return -EINVAL; 10991da177e4SLinus Torvalds read_lock(&mrt_lock); 1100cf958ae3SBenjamin Thery vif = &init_net.ipv4.vif_table[vr.vifi]; 1101cf958ae3SBenjamin Thery if (VIF_EXISTS(&init_net, vr.vifi)) { 11021da177e4SLinus Torvalds vr.icount = vif->pkt_in; 11031da177e4SLinus Torvalds vr.ocount = vif->pkt_out; 11041da177e4SLinus Torvalds vr.ibytes = vif->bytes_in; 11051da177e4SLinus Torvalds vr.obytes = vif->bytes_out; 11061da177e4SLinus Torvalds read_unlock(&mrt_lock); 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds if (copy_to_user(arg, &vr, sizeof(vr))) 11091da177e4SLinus Torvalds return -EFAULT; 11101da177e4SLinus Torvalds return 0; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds read_unlock(&mrt_lock); 11131da177e4SLinus Torvalds return -EADDRNOTAVAIL; 11141da177e4SLinus Torvalds case SIOCGETSGCNT: 11151da177e4SLinus Torvalds if (copy_from_user(&sr, arg, sizeof(sr))) 11161da177e4SLinus Torvalds return -EFAULT; 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds read_lock(&mrt_lock); 11191da177e4SLinus Torvalds c = ipmr_cache_find(sr.src.s_addr, sr.grp.s_addr); 11201da177e4SLinus Torvalds if (c) { 11211da177e4SLinus Torvalds sr.pktcnt = c->mfc_un.res.pkt; 11221da177e4SLinus Torvalds sr.bytecnt = c->mfc_un.res.bytes; 11231da177e4SLinus Torvalds sr.wrong_if = c->mfc_un.res.wrong_if; 11241da177e4SLinus Torvalds read_unlock(&mrt_lock); 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds if (copy_to_user(arg, &sr, sizeof(sr))) 11271da177e4SLinus Torvalds return -EFAULT; 11281da177e4SLinus Torvalds return 0; 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds read_unlock(&mrt_lock); 11311da177e4SLinus Torvalds return -EADDRNOTAVAIL; 11321da177e4SLinus Torvalds default: 11331da177e4SLinus Torvalds return -ENOIOCTLCMD; 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) 11391da177e4SLinus Torvalds { 1140e9dc8653SEric W. Biederman struct net_device *dev = ptr; 11411da177e4SLinus Torvalds struct vif_device *v; 11421da177e4SLinus Torvalds int ct; 1143e9dc8653SEric W. Biederman 1144721499e8SYOSHIFUJI Hideaki if (!net_eq(dev_net(dev), &init_net)) 1145e9dc8653SEric W. Biederman return NOTIFY_DONE; 1146e9dc8653SEric W. Biederman 11471da177e4SLinus Torvalds if (event != NETDEV_UNREGISTER) 11481da177e4SLinus Torvalds return NOTIFY_DONE; 1149cf958ae3SBenjamin Thery v = &init_net.ipv4.vif_table[0]; 1150cf958ae3SBenjamin Thery for (ct = 0; ct < init_net.ipv4.maxvif; ct++, v++) { 1151e9dc8653SEric W. Biederman if (v->dev == dev) 11527dc00c82SWang Chen vif_delete(ct, 1); 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds return NOTIFY_DONE; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds static struct notifier_block ip_mr_notifier = { 11591da177e4SLinus Torvalds .notifier_call = ipmr_device_event, 11601da177e4SLinus Torvalds }; 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds /* 11631da177e4SLinus Torvalds * Encapsulate a packet by attaching a valid IPIP header to it. 11641da177e4SLinus Torvalds * This avoids tunnel drivers and other mess and gives us the speed so 11651da177e4SLinus Torvalds * important for multicast video. 11661da177e4SLinus Torvalds */ 11671da177e4SLinus Torvalds 1168114c7844SAl Viro static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr) 11691da177e4SLinus Torvalds { 11708856dfa3SArnaldo Carvalho de Melo struct iphdr *iph; 1171eddc9ec5SArnaldo Carvalho de Melo struct iphdr *old_iph = ip_hdr(skb); 11728856dfa3SArnaldo Carvalho de Melo 11738856dfa3SArnaldo Carvalho de Melo skb_push(skb, sizeof(struct iphdr)); 1174b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 11758856dfa3SArnaldo Carvalho de Melo skb_reset_network_header(skb); 1176eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds iph->version = 4; 1179e023dd64SArnaldo Carvalho de Melo iph->tos = old_iph->tos; 1180e023dd64SArnaldo Carvalho de Melo iph->ttl = old_iph->ttl; 11811da177e4SLinus Torvalds iph->frag_off = 0; 11821da177e4SLinus Torvalds iph->daddr = daddr; 11831da177e4SLinus Torvalds iph->saddr = saddr; 11841da177e4SLinus Torvalds iph->protocol = IPPROTO_IPIP; 11851da177e4SLinus Torvalds iph->ihl = 5; 11861da177e4SLinus Torvalds iph->tot_len = htons(skb->len); 11871da177e4SLinus Torvalds ip_select_ident(iph, skb->dst, NULL); 11881da177e4SLinus Torvalds ip_send_check(iph); 11891da177e4SLinus Torvalds 11901da177e4SLinus Torvalds memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 11911da177e4SLinus Torvalds nf_reset(skb); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds static inline int ipmr_forward_finish(struct sk_buff *skb) 11951da177e4SLinus Torvalds { 11961da177e4SLinus Torvalds struct ip_options * opt = &(IPCB(skb)->opt); 11971da177e4SLinus Torvalds 11987c73a6faSPavel Emelyanov IP_INC_STATS_BH(dev_net(skb->dst->dev), IPSTATS_MIB_OUTFORWDATAGRAMS); 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds if (unlikely(opt->optlen)) 12011da177e4SLinus Torvalds ip_forward_options(skb); 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds return dst_output(skb); 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds /* 12071da177e4SLinus Torvalds * Processing handlers for ipmr_forward 12081da177e4SLinus Torvalds */ 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi) 12111da177e4SLinus Torvalds { 1212eddc9ec5SArnaldo Carvalho de Melo const struct iphdr *iph = ip_hdr(skb); 1213cf958ae3SBenjamin Thery struct vif_device *vif = &init_net.ipv4.vif_table[vifi]; 12141da177e4SLinus Torvalds struct net_device *dev; 12151da177e4SLinus Torvalds struct rtable *rt; 12161da177e4SLinus Torvalds int encap = 0; 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds if (vif->dev == NULL) 12191da177e4SLinus Torvalds goto out_free; 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM 12221da177e4SLinus Torvalds if (vif->flags & VIFF_REGISTER) { 12231da177e4SLinus Torvalds vif->pkt_out++; 12241da177e4SLinus Torvalds vif->bytes_out += skb->len; 1225cf3677aeSPavel Emelyanov vif->dev->stats.tx_bytes += skb->len; 1226cf3677aeSPavel Emelyanov vif->dev->stats.tx_packets++; 12271da177e4SLinus Torvalds ipmr_cache_report(skb, vifi, IGMPMSG_WHOLEPKT); 12281da177e4SLinus Torvalds kfree_skb(skb); 12291da177e4SLinus Torvalds return; 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds #endif 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds if (vif->flags&VIFF_TUNNEL) { 12341da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 12351da177e4SLinus Torvalds .nl_u = { .ip4_u = 12361da177e4SLinus Torvalds { .daddr = vif->remote, 12371da177e4SLinus Torvalds .saddr = vif->local, 12381da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 12391da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 1240f206351aSDenis V. Lunev if (ip_route_output_key(&init_net, &rt, &fl)) 12411da177e4SLinus Torvalds goto out_free; 12421da177e4SLinus Torvalds encap = sizeof(struct iphdr); 12431da177e4SLinus Torvalds } else { 12441da177e4SLinus Torvalds struct flowi fl = { .oif = vif->link, 12451da177e4SLinus Torvalds .nl_u = { .ip4_u = 12461da177e4SLinus Torvalds { .daddr = iph->daddr, 12471da177e4SLinus Torvalds .tos = RT_TOS(iph->tos) } }, 12481da177e4SLinus Torvalds .proto = IPPROTO_IPIP }; 1249f206351aSDenis V. Lunev if (ip_route_output_key(&init_net, &rt, &fl)) 12501da177e4SLinus Torvalds goto out_free; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvalds dev = rt->u.dst.dev; 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) { 12561da177e4SLinus Torvalds /* Do not fragment multicasts. Alas, IPv4 does not 12571da177e4SLinus Torvalds allow to send ICMP, so that packets will disappear 12581da177e4SLinus Torvalds to blackhole. 12591da177e4SLinus Torvalds */ 12601da177e4SLinus Torvalds 12617c73a6faSPavel Emelyanov IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_FRAGFAILS); 12621da177e4SLinus Torvalds ip_rt_put(rt); 12631da177e4SLinus Torvalds goto out_free; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds encap += LL_RESERVED_SPACE(dev) + rt->u.dst.header_len; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds if (skb_cow(skb, encap)) { 12691da177e4SLinus Torvalds ip_rt_put(rt); 12701da177e4SLinus Torvalds goto out_free; 12711da177e4SLinus Torvalds } 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvalds vif->pkt_out++; 12741da177e4SLinus Torvalds vif->bytes_out += skb->len; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds dst_release(skb->dst); 12771da177e4SLinus Torvalds skb->dst = &rt->u.dst; 1278eddc9ec5SArnaldo Carvalho de Melo ip_decrease_ttl(ip_hdr(skb)); 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds /* FIXME: forward and output firewalls used to be called here. 12811da177e4SLinus Torvalds * What do we do with netfilter? -- RR */ 12821da177e4SLinus Torvalds if (vif->flags & VIFF_TUNNEL) { 12831da177e4SLinus Torvalds ip_encap(skb, vif->local, vif->remote); 12841da177e4SLinus Torvalds /* FIXME: extra output firewall step used to be here. --RR */ 12852f4c02d4SPavel Emelyanov vif->dev->stats.tx_packets++; 12862f4c02d4SPavel Emelyanov vif->dev->stats.tx_bytes += skb->len; 12871da177e4SLinus Torvalds } 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds IPCB(skb)->flags |= IPSKB_FORWARDED; 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds /* 12921da177e4SLinus Torvalds * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally 12931da177e4SLinus Torvalds * not only before forwarding, but after forwarding on all output 12941da177e4SLinus Torvalds * interfaces. It is clear, if mrouter runs a multicasting 12951da177e4SLinus Torvalds * program, it should receive packets not depending to what interface 12961da177e4SLinus Torvalds * program is joined. 12971da177e4SLinus Torvalds * If we will not make it, the program will have to join on all 12981da177e4SLinus Torvalds * interfaces. On the other hand, multihoming host (or router, but 12991da177e4SLinus Torvalds * not mrouter) cannot join to more than one interface - it will 13001da177e4SLinus Torvalds * result in receiving multiple packets. 13011da177e4SLinus Torvalds */ 13026e23ae2aSPatrick McHardy NF_HOOK(PF_INET, NF_INET_FORWARD, skb, skb->dev, dev, 13031da177e4SLinus Torvalds ipmr_forward_finish); 13041da177e4SLinus Torvalds return; 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds out_free: 13071da177e4SLinus Torvalds kfree_skb(skb); 13081da177e4SLinus Torvalds return; 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds static int ipmr_find_vif(struct net_device *dev) 13121da177e4SLinus Torvalds { 13131da177e4SLinus Torvalds int ct; 1314cf958ae3SBenjamin Thery for (ct = init_net.ipv4.maxvif-1; ct >= 0; ct--) { 1315cf958ae3SBenjamin Thery if (init_net.ipv4.vif_table[ct].dev == dev) 13161da177e4SLinus Torvalds break; 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds return ct; 13191da177e4SLinus Torvalds } 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds /* "local" means that we should preserve one skb (for local delivery) */ 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local) 13241da177e4SLinus Torvalds { 13251da177e4SLinus Torvalds int psend = -1; 13261da177e4SLinus Torvalds int vif, ct; 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds vif = cache->mfc_parent; 13291da177e4SLinus Torvalds cache->mfc_un.res.pkt++; 13301da177e4SLinus Torvalds cache->mfc_un.res.bytes += skb->len; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds /* 13331da177e4SLinus Torvalds * Wrong interface: drop packet and (maybe) send PIM assert. 13341da177e4SLinus Torvalds */ 1335cf958ae3SBenjamin Thery if (init_net.ipv4.vif_table[vif].dev != skb->dev) { 13361da177e4SLinus Torvalds int true_vifi; 13371da177e4SLinus Torvalds 1338ee6b9673SEric Dumazet if (skb->rtable->fl.iif == 0) { 13391da177e4SLinus Torvalds /* It is our own packet, looped back. 13401da177e4SLinus Torvalds Very complicated situation... 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds The best workaround until routing daemons will be 13431da177e4SLinus Torvalds fixed is not to redistribute packet, if it was 13441da177e4SLinus Torvalds send through wrong interface. It means, that 13451da177e4SLinus Torvalds multicast applications WILL NOT work for 13461da177e4SLinus Torvalds (S,G), which have default multicast route pointing 13471da177e4SLinus Torvalds to wrong oif. In any case, it is not a good 13481da177e4SLinus Torvalds idea to use multicasting applications on router. 13491da177e4SLinus Torvalds */ 13501da177e4SLinus Torvalds goto dont_forward; 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds cache->mfc_un.res.wrong_if++; 13541da177e4SLinus Torvalds true_vifi = ipmr_find_vif(skb->dev); 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds if (true_vifi >= 0 && mroute_do_assert && 13571da177e4SLinus Torvalds /* pimsm uses asserts, when switching from RPT to SPT, 13581da177e4SLinus Torvalds so that we cannot check that packet arrived on an oif. 13591da177e4SLinus Torvalds It is bad, but otherwise we would need to move pretty 13601da177e4SLinus Torvalds large chunk of pimd to kernel. Ough... --ANK 13611da177e4SLinus Torvalds */ 13621da177e4SLinus Torvalds (mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) && 13631da177e4SLinus Torvalds time_after(jiffies, 13641da177e4SLinus Torvalds cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { 13651da177e4SLinus Torvalds cache->mfc_un.res.last_assert = jiffies; 13661da177e4SLinus Torvalds ipmr_cache_report(skb, true_vifi, IGMPMSG_WRONGVIF); 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds goto dont_forward; 13691da177e4SLinus Torvalds } 13701da177e4SLinus Torvalds 1371cf958ae3SBenjamin Thery init_net.ipv4.vif_table[vif].pkt_in++; 1372cf958ae3SBenjamin Thery init_net.ipv4.vif_table[vif].bytes_in += skb->len; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds /* 13751da177e4SLinus Torvalds * Forward the frame 13761da177e4SLinus Torvalds */ 13771da177e4SLinus Torvalds for (ct = cache->mfc_un.res.maxvif-1; ct >= cache->mfc_un.res.minvif; ct--) { 1378eddc9ec5SArnaldo Carvalho de Melo if (ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { 13791da177e4SLinus Torvalds if (psend != -1) { 13801da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13811da177e4SLinus Torvalds if (skb2) 13821da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds psend = ct; 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds if (psend != -1) { 13881da177e4SLinus Torvalds if (local) { 13891da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 13901da177e4SLinus Torvalds if (skb2) 13911da177e4SLinus Torvalds ipmr_queue_xmit(skb2, cache, psend); 13921da177e4SLinus Torvalds } else { 13931da177e4SLinus Torvalds ipmr_queue_xmit(skb, cache, psend); 13941da177e4SLinus Torvalds return 0; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds dont_forward: 13991da177e4SLinus Torvalds if (!local) 14001da177e4SLinus Torvalds kfree_skb(skb); 14011da177e4SLinus Torvalds return 0; 14021da177e4SLinus Torvalds } 14031da177e4SLinus Torvalds 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds /* 14061da177e4SLinus Torvalds * Multicast packets for forwarding arrive here 14071da177e4SLinus Torvalds */ 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds int ip_mr_input(struct sk_buff *skb) 14101da177e4SLinus Torvalds { 14111da177e4SLinus Torvalds struct mfc_cache *cache; 1412ee6b9673SEric Dumazet int local = skb->rtable->rt_flags&RTCF_LOCAL; 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds /* Packet is looped back after forward, it should not be 14151da177e4SLinus Torvalds forwarded second time, but still can be delivered locally. 14161da177e4SLinus Torvalds */ 14171da177e4SLinus Torvalds if (IPCB(skb)->flags&IPSKB_FORWARDED) 14181da177e4SLinus Torvalds goto dont_forward; 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds if (!local) { 14211da177e4SLinus Torvalds if (IPCB(skb)->opt.router_alert) { 14221da177e4SLinus Torvalds if (ip_call_ra_chain(skb)) 14231da177e4SLinus Torvalds return 0; 1424eddc9ec5SArnaldo Carvalho de Melo } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP){ 14251da177e4SLinus Torvalds /* IGMPv1 (and broken IGMPv2 implementations sort of 14261da177e4SLinus Torvalds Cisco IOS <= 11.2(8)) do not put router alert 14271da177e4SLinus Torvalds option to IGMP packets destined to routable 14281da177e4SLinus Torvalds groups. It is very bad, because it means 14291da177e4SLinus Torvalds that we can forward NO IGMP messages. 14301da177e4SLinus Torvalds */ 14311da177e4SLinus Torvalds read_lock(&mrt_lock); 143270a269e6SBenjamin Thery if (init_net.ipv4.mroute_sk) { 14332715bcf9SPatrick McHardy nf_reset(skb); 143470a269e6SBenjamin Thery raw_rcv(init_net.ipv4.mroute_sk, skb); 14351da177e4SLinus Torvalds read_unlock(&mrt_lock); 14361da177e4SLinus Torvalds return 0; 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds read_unlock(&mrt_lock); 14391da177e4SLinus Torvalds } 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds read_lock(&mrt_lock); 1443eddc9ec5SArnaldo Carvalho de Melo cache = ipmr_cache_find(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); 14441da177e4SLinus Torvalds 14451da177e4SLinus Torvalds /* 14461da177e4SLinus Torvalds * No usable cache entry 14471da177e4SLinus Torvalds */ 14481da177e4SLinus Torvalds if (cache == NULL) { 14491da177e4SLinus Torvalds int vif; 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds if (local) { 14521da177e4SLinus Torvalds struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); 14531da177e4SLinus Torvalds ip_local_deliver(skb); 14541da177e4SLinus Torvalds if (skb2 == NULL) { 14551da177e4SLinus Torvalds read_unlock(&mrt_lock); 14561da177e4SLinus Torvalds return -ENOBUFS; 14571da177e4SLinus Torvalds } 14581da177e4SLinus Torvalds skb = skb2; 14591da177e4SLinus Torvalds } 14601da177e4SLinus Torvalds 14611da177e4SLinus Torvalds vif = ipmr_find_vif(skb->dev); 14621da177e4SLinus Torvalds if (vif >= 0) { 14631da177e4SLinus Torvalds int err = ipmr_cache_unresolved(vif, skb); 14641da177e4SLinus Torvalds read_unlock(&mrt_lock); 14651da177e4SLinus Torvalds 14661da177e4SLinus Torvalds return err; 14671da177e4SLinus Torvalds } 14681da177e4SLinus Torvalds read_unlock(&mrt_lock); 14691da177e4SLinus Torvalds kfree_skb(skb); 14701da177e4SLinus Torvalds return -ENODEV; 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds ip_mr_forward(skb, cache, local); 14741da177e4SLinus Torvalds 14751da177e4SLinus Torvalds read_unlock(&mrt_lock); 14761da177e4SLinus Torvalds 14771da177e4SLinus Torvalds if (local) 14781da177e4SLinus Torvalds return ip_local_deliver(skb); 14791da177e4SLinus Torvalds 14801da177e4SLinus Torvalds return 0; 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds dont_forward: 14831da177e4SLinus Torvalds if (local) 14841da177e4SLinus Torvalds return ip_local_deliver(skb); 14851da177e4SLinus Torvalds kfree_skb(skb); 14861da177e4SLinus Torvalds return 0; 14871da177e4SLinus Torvalds } 14881da177e4SLinus Torvalds 1489b1879204SIlpo Järvinen #ifdef CONFIG_IP_PIMSM 1490b1879204SIlpo Järvinen static int __pim_rcv(struct sk_buff *skb, unsigned int pimlen) 14911da177e4SLinus Torvalds { 14921da177e4SLinus Torvalds struct net_device *reg_dev = NULL; 1493b1879204SIlpo Järvinen struct iphdr *encap; 14941da177e4SLinus Torvalds 1495b1879204SIlpo Järvinen encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); 14961da177e4SLinus Torvalds /* 14971da177e4SLinus Torvalds Check that: 14981da177e4SLinus Torvalds a. packet is really destinted to a multicast group 14991da177e4SLinus Torvalds b. packet is not a NULL-REGISTER 15001da177e4SLinus Torvalds c. packet is not truncated 15011da177e4SLinus Torvalds */ 1502f97c1e0cSJoe Perches if (!ipv4_is_multicast(encap->daddr) || 15031da177e4SLinus Torvalds encap->tot_len == 0 || 1504b1879204SIlpo Järvinen ntohs(encap->tot_len) + pimlen > skb->len) 1505b1879204SIlpo Järvinen return 1; 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds read_lock(&mrt_lock); 15081da177e4SLinus Torvalds if (reg_vif_num >= 0) 1509cf958ae3SBenjamin Thery reg_dev = init_net.ipv4.vif_table[reg_vif_num].dev; 15101da177e4SLinus Torvalds if (reg_dev) 15111da177e4SLinus Torvalds dev_hold(reg_dev); 15121da177e4SLinus Torvalds read_unlock(&mrt_lock); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds if (reg_dev == NULL) 1515b1879204SIlpo Järvinen return 1; 15161da177e4SLinus Torvalds 1517b0e380b1SArnaldo Carvalho de Melo skb->mac_header = skb->network_header; 15181da177e4SLinus Torvalds skb_pull(skb, (u8*)encap - skb->data); 151931c7711bSArnaldo Carvalho de Melo skb_reset_network_header(skb); 15201da177e4SLinus Torvalds skb->dev = reg_dev; 15211da177e4SLinus Torvalds skb->protocol = htons(ETH_P_IP); 15221da177e4SLinus Torvalds skb->ip_summed = 0; 15231da177e4SLinus Torvalds skb->pkt_type = PACKET_HOST; 15241da177e4SLinus Torvalds dst_release(skb->dst); 15251da177e4SLinus Torvalds skb->dst = NULL; 1526cf3677aeSPavel Emelyanov reg_dev->stats.rx_bytes += skb->len; 1527cf3677aeSPavel Emelyanov reg_dev->stats.rx_packets++; 15281da177e4SLinus Torvalds nf_reset(skb); 15291da177e4SLinus Torvalds netif_rx(skb); 15301da177e4SLinus Torvalds dev_put(reg_dev); 1531b1879204SIlpo Järvinen 15321da177e4SLinus Torvalds return 0; 1533b1879204SIlpo Järvinen } 1534b1879204SIlpo Järvinen #endif 1535b1879204SIlpo Järvinen 1536b1879204SIlpo Järvinen #ifdef CONFIG_IP_PIMSM_V1 1537b1879204SIlpo Järvinen /* 1538b1879204SIlpo Järvinen * Handle IGMP messages of PIMv1 1539b1879204SIlpo Järvinen */ 1540b1879204SIlpo Järvinen 1541b1879204SIlpo Järvinen int pim_rcv_v1(struct sk_buff * skb) 1542b1879204SIlpo Järvinen { 1543b1879204SIlpo Järvinen struct igmphdr *pim; 1544b1879204SIlpo Järvinen 1545b1879204SIlpo Järvinen if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) 1546b1879204SIlpo Järvinen goto drop; 1547b1879204SIlpo Järvinen 1548b1879204SIlpo Järvinen pim = igmp_hdr(skb); 1549b1879204SIlpo Järvinen 1550b1879204SIlpo Järvinen if (!mroute_do_pim || 1551b1879204SIlpo Järvinen pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) 1552b1879204SIlpo Järvinen goto drop; 1553b1879204SIlpo Järvinen 1554b1879204SIlpo Järvinen if (__pim_rcv(skb, sizeof(*pim))) { 15551da177e4SLinus Torvalds drop: 15561da177e4SLinus Torvalds kfree_skb(skb); 1557b1879204SIlpo Järvinen } 15581da177e4SLinus Torvalds return 0; 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds #endif 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 15631da177e4SLinus Torvalds static int pim_rcv(struct sk_buff * skb) 15641da177e4SLinus Torvalds { 15651da177e4SLinus Torvalds struct pimreghdr *pim; 15661da177e4SLinus Torvalds 1567b1879204SIlpo Järvinen if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) 15681da177e4SLinus Torvalds goto drop; 15691da177e4SLinus Torvalds 15709c70220bSArnaldo Carvalho de Melo pim = (struct pimreghdr *)skb_transport_header(skb); 15711da177e4SLinus Torvalds if (pim->type != ((PIM_VERSION<<4)|(PIM_REGISTER)) || 15721da177e4SLinus Torvalds (pim->flags&PIM_NULL_REGISTER) || 15731da177e4SLinus Torvalds (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && 1574d3bc23e7SAl Viro csum_fold(skb_checksum(skb, 0, skb->len, 0)))) 15751da177e4SLinus Torvalds goto drop; 15761da177e4SLinus Torvalds 1577b1879204SIlpo Järvinen if (__pim_rcv(skb, sizeof(*pim))) { 15781da177e4SLinus Torvalds drop: 15791da177e4SLinus Torvalds kfree_skb(skb); 1580b1879204SIlpo Järvinen } 15811da177e4SLinus Torvalds return 0; 15821da177e4SLinus Torvalds } 15831da177e4SLinus Torvalds #endif 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds static int 15861da177e4SLinus Torvalds ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm) 15871da177e4SLinus Torvalds { 15881da177e4SLinus Torvalds int ct; 15891da177e4SLinus Torvalds struct rtnexthop *nhp; 1590cf958ae3SBenjamin Thery struct net_device *dev = init_net.ipv4.vif_table[c->mfc_parent].dev; 159127a884dcSArnaldo Carvalho de Melo u8 *b = skb_tail_pointer(skb); 15921da177e4SLinus Torvalds struct rtattr *mp_head; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds if (dev) 15951da177e4SLinus Torvalds RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex); 15961da177e4SLinus Torvalds 15971da177e4SLinus Torvalds mp_head = (struct rtattr *)skb_put(skb, RTA_LENGTH(0)); 15981da177e4SLinus Torvalds 15991da177e4SLinus Torvalds for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { 16001da177e4SLinus Torvalds if (c->mfc_un.res.ttls[ct] < 255) { 16011da177e4SLinus Torvalds if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4)) 16021da177e4SLinus Torvalds goto rtattr_failure; 16031da177e4SLinus Torvalds nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp))); 16041da177e4SLinus Torvalds nhp->rtnh_flags = 0; 16051da177e4SLinus Torvalds nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; 1606cf958ae3SBenjamin Thery nhp->rtnh_ifindex = init_net.ipv4.vif_table[ct].dev->ifindex; 16071da177e4SLinus Torvalds nhp->rtnh_len = sizeof(*nhp); 16081da177e4SLinus Torvalds } 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds mp_head->rta_type = RTA_MULTIPATH; 161127a884dcSArnaldo Carvalho de Melo mp_head->rta_len = skb_tail_pointer(skb) - (u8 *)mp_head; 16121da177e4SLinus Torvalds rtm->rtm_type = RTN_MULTICAST; 16131da177e4SLinus Torvalds return 1; 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds rtattr_failure: 1616dc5fc579SArnaldo Carvalho de Melo nlmsg_trim(skb, b); 16171da177e4SLinus Torvalds return -EMSGSIZE; 16181da177e4SLinus Torvalds } 16191da177e4SLinus Torvalds 16201da177e4SLinus Torvalds int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait) 16211da177e4SLinus Torvalds { 16221da177e4SLinus Torvalds int err; 16231da177e4SLinus Torvalds struct mfc_cache *cache; 1624ee6b9673SEric Dumazet struct rtable *rt = skb->rtable; 16251da177e4SLinus Torvalds 16261da177e4SLinus Torvalds read_lock(&mrt_lock); 16271da177e4SLinus Torvalds cache = ipmr_cache_find(rt->rt_src, rt->rt_dst); 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds if (cache == NULL) { 163072287490SAlexey Kuznetsov struct sk_buff *skb2; 1631eddc9ec5SArnaldo Carvalho de Melo struct iphdr *iph; 16321da177e4SLinus Torvalds struct net_device *dev; 16331da177e4SLinus Torvalds int vif; 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds if (nowait) { 16361da177e4SLinus Torvalds read_unlock(&mrt_lock); 16371da177e4SLinus Torvalds return -EAGAIN; 16381da177e4SLinus Torvalds } 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds dev = skb->dev; 16411da177e4SLinus Torvalds if (dev == NULL || (vif = ipmr_find_vif(dev)) < 0) { 16421da177e4SLinus Torvalds read_unlock(&mrt_lock); 16431da177e4SLinus Torvalds return -ENODEV; 16441da177e4SLinus Torvalds } 164572287490SAlexey Kuznetsov skb2 = skb_clone(skb, GFP_ATOMIC); 164672287490SAlexey Kuznetsov if (!skb2) { 164772287490SAlexey Kuznetsov read_unlock(&mrt_lock); 164872287490SAlexey Kuznetsov return -ENOMEM; 164972287490SAlexey Kuznetsov } 165072287490SAlexey Kuznetsov 1651e2d1bca7SArnaldo Carvalho de Melo skb_push(skb2, sizeof(struct iphdr)); 1652e2d1bca7SArnaldo Carvalho de Melo skb_reset_network_header(skb2); 1653eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb2); 1654eddc9ec5SArnaldo Carvalho de Melo iph->ihl = sizeof(struct iphdr) >> 2; 1655eddc9ec5SArnaldo Carvalho de Melo iph->saddr = rt->rt_src; 1656eddc9ec5SArnaldo Carvalho de Melo iph->daddr = rt->rt_dst; 1657eddc9ec5SArnaldo Carvalho de Melo iph->version = 0; 165872287490SAlexey Kuznetsov err = ipmr_cache_unresolved(vif, skb2); 16591da177e4SLinus Torvalds read_unlock(&mrt_lock); 16601da177e4SLinus Torvalds return err; 16611da177e4SLinus Torvalds } 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) 16641da177e4SLinus Torvalds cache->mfc_flags |= MFC_NOTIFY; 16651da177e4SLinus Torvalds err = ipmr_fill_mroute(skb, cache, rtm); 16661da177e4SLinus Torvalds read_unlock(&mrt_lock); 16671da177e4SLinus Torvalds return err; 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 16711da177e4SLinus Torvalds /* 16721da177e4SLinus Torvalds * The /proc interfaces to multicast routing /proc/ip_mr_cache /proc/ip_mr_vif 16731da177e4SLinus Torvalds */ 16741da177e4SLinus Torvalds struct ipmr_vif_iter { 16751da177e4SLinus Torvalds int ct; 16761da177e4SLinus Torvalds }; 16771da177e4SLinus Torvalds 16781da177e4SLinus Torvalds static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter, 16791da177e4SLinus Torvalds loff_t pos) 16801da177e4SLinus Torvalds { 1681cf958ae3SBenjamin Thery for (iter->ct = 0; iter->ct < init_net.ipv4.maxvif; ++iter->ct) { 1682cf958ae3SBenjamin Thery if (!VIF_EXISTS(&init_net, iter->ct)) 16831da177e4SLinus Torvalds continue; 16841da177e4SLinus Torvalds if (pos-- == 0) 1685cf958ae3SBenjamin Thery return &init_net.ipv4.vif_table[iter->ct]; 16861da177e4SLinus Torvalds } 16871da177e4SLinus Torvalds return NULL; 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) 1691ba93ef74SStephen Hemminger __acquires(mrt_lock) 16921da177e4SLinus Torvalds { 16931da177e4SLinus Torvalds read_lock(&mrt_lock); 16941da177e4SLinus Torvalds return *pos ? ipmr_vif_seq_idx(seq->private, *pos - 1) 16951da177e4SLinus Torvalds : SEQ_START_TOKEN; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) 16991da177e4SLinus Torvalds { 17001da177e4SLinus Torvalds struct ipmr_vif_iter *iter = seq->private; 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds ++*pos; 17031da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 17041da177e4SLinus Torvalds return ipmr_vif_seq_idx(iter, 0); 17051da177e4SLinus Torvalds 1706cf958ae3SBenjamin Thery while (++iter->ct < init_net.ipv4.maxvif) { 1707cf958ae3SBenjamin Thery if (!VIF_EXISTS(&init_net, iter->ct)) 17081da177e4SLinus Torvalds continue; 1709cf958ae3SBenjamin Thery return &init_net.ipv4.vif_table[iter->ct]; 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds return NULL; 17121da177e4SLinus Torvalds } 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) 1715ba93ef74SStephen Hemminger __releases(mrt_lock) 17161da177e4SLinus Torvalds { 17171da177e4SLinus Torvalds read_unlock(&mrt_lock); 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds static int ipmr_vif_seq_show(struct seq_file *seq, void *v) 17211da177e4SLinus Torvalds { 17221da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 17231da177e4SLinus Torvalds seq_puts(seq, 17241da177e4SLinus Torvalds "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); 17251da177e4SLinus Torvalds } else { 17261da177e4SLinus Torvalds const struct vif_device *vif = v; 17271da177e4SLinus Torvalds const char *name = vif->dev ? vif->dev->name : "none"; 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds seq_printf(seq, 17301da177e4SLinus Torvalds "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", 1731cf958ae3SBenjamin Thery vif - init_net.ipv4.vif_table, 17321da177e4SLinus Torvalds name, vif->bytes_in, vif->pkt_in, 17331da177e4SLinus Torvalds vif->bytes_out, vif->pkt_out, 17341da177e4SLinus Torvalds vif->flags, vif->local, vif->remote); 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds return 0; 17371da177e4SLinus Torvalds } 17381da177e4SLinus Torvalds 1739f690808eSStephen Hemminger static const struct seq_operations ipmr_vif_seq_ops = { 17401da177e4SLinus Torvalds .start = ipmr_vif_seq_start, 17411da177e4SLinus Torvalds .next = ipmr_vif_seq_next, 17421da177e4SLinus Torvalds .stop = ipmr_vif_seq_stop, 17431da177e4SLinus Torvalds .show = ipmr_vif_seq_show, 17441da177e4SLinus Torvalds }; 17451da177e4SLinus Torvalds 17461da177e4SLinus Torvalds static int ipmr_vif_open(struct inode *inode, struct file *file) 17471da177e4SLinus Torvalds { 1748cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_vif_seq_ops, 1749cf7732e4SPavel Emelyanov sizeof(struct ipmr_vif_iter)); 17501da177e4SLinus Torvalds } 17511da177e4SLinus Torvalds 17529a32144eSArjan van de Ven static const struct file_operations ipmr_vif_fops = { 17531da177e4SLinus Torvalds .owner = THIS_MODULE, 17541da177e4SLinus Torvalds .open = ipmr_vif_open, 17551da177e4SLinus Torvalds .read = seq_read, 17561da177e4SLinus Torvalds .llseek = seq_lseek, 17571da177e4SLinus Torvalds .release = seq_release_private, 17581da177e4SLinus Torvalds }; 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds struct ipmr_mfc_iter { 17611da177e4SLinus Torvalds struct mfc_cache **cache; 17621da177e4SLinus Torvalds int ct; 17631da177e4SLinus Torvalds }; 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds 17661da177e4SLinus Torvalds static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos) 17671da177e4SLinus Torvalds { 17681da177e4SLinus Torvalds struct mfc_cache *mfc; 17691da177e4SLinus Torvalds 1770*2bb8b26cSBenjamin Thery it->cache = init_net.ipv4.mfc_cache_array; 17711da177e4SLinus Torvalds read_lock(&mrt_lock); 17721da177e4SLinus Torvalds for (it->ct = 0; it->ct < MFC_LINES; it->ct++) 1773*2bb8b26cSBenjamin Thery for (mfc = init_net.ipv4.mfc_cache_array[it->ct]; 1774*2bb8b26cSBenjamin Thery mfc; mfc = mfc->next) 17751da177e4SLinus Torvalds if (pos-- == 0) 17761da177e4SLinus Torvalds return mfc; 17771da177e4SLinus Torvalds read_unlock(&mrt_lock); 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 17801da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 17811da177e4SLinus Torvalds for (mfc = mfc_unres_queue; mfc; mfc = mfc->next) 17821da177e4SLinus Torvalds if (pos-- == 0) 17831da177e4SLinus Torvalds return mfc; 17841da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds it->cache = NULL; 17871da177e4SLinus Torvalds return NULL; 17881da177e4SLinus Torvalds } 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds 17911da177e4SLinus Torvalds static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) 17921da177e4SLinus Torvalds { 17931da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 17941da177e4SLinus Torvalds it->cache = NULL; 17951da177e4SLinus Torvalds it->ct = 0; 17961da177e4SLinus Torvalds return *pos ? ipmr_mfc_seq_idx(seq->private, *pos - 1) 17971da177e4SLinus Torvalds : SEQ_START_TOKEN; 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) 18011da177e4SLinus Torvalds { 18021da177e4SLinus Torvalds struct mfc_cache *mfc = v; 18031da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 18041da177e4SLinus Torvalds 18051da177e4SLinus Torvalds ++*pos; 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 18081da177e4SLinus Torvalds return ipmr_mfc_seq_idx(seq->private, 0); 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds if (mfc->next) 18111da177e4SLinus Torvalds return mfc->next; 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 18141da177e4SLinus Torvalds goto end_of_list; 18151da177e4SLinus Torvalds 1816*2bb8b26cSBenjamin Thery BUG_ON(it->cache != init_net.ipv4.mfc_cache_array); 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds while (++it->ct < MFC_LINES) { 1819*2bb8b26cSBenjamin Thery mfc = init_net.ipv4.mfc_cache_array[it->ct]; 18201da177e4SLinus Torvalds if (mfc) 18211da177e4SLinus Torvalds return mfc; 18221da177e4SLinus Torvalds } 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds /* exhausted cache_array, show unresolved */ 18251da177e4SLinus Torvalds read_unlock(&mrt_lock); 18261da177e4SLinus Torvalds it->cache = &mfc_unres_queue; 18271da177e4SLinus Torvalds it->ct = 0; 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds spin_lock_bh(&mfc_unres_lock); 18301da177e4SLinus Torvalds mfc = mfc_unres_queue; 18311da177e4SLinus Torvalds if (mfc) 18321da177e4SLinus Torvalds return mfc; 18331da177e4SLinus Torvalds 18341da177e4SLinus Torvalds end_of_list: 18351da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 18361da177e4SLinus Torvalds it->cache = NULL; 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds return NULL; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) 18421da177e4SLinus Torvalds { 18431da177e4SLinus Torvalds struct ipmr_mfc_iter *it = seq->private; 18441da177e4SLinus Torvalds 18451da177e4SLinus Torvalds if (it->cache == &mfc_unres_queue) 18461da177e4SLinus Torvalds spin_unlock_bh(&mfc_unres_lock); 1847*2bb8b26cSBenjamin Thery else if (it->cache == init_net.ipv4.mfc_cache_array) 18481da177e4SLinus Torvalds read_unlock(&mrt_lock); 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds 18511da177e4SLinus Torvalds static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) 18521da177e4SLinus Torvalds { 18531da177e4SLinus Torvalds int n; 18541da177e4SLinus Torvalds 18551da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) { 18561da177e4SLinus Torvalds seq_puts(seq, 18571da177e4SLinus Torvalds "Group Origin Iif Pkts Bytes Wrong Oifs\n"); 18581da177e4SLinus Torvalds } else { 18591da177e4SLinus Torvalds const struct mfc_cache *mfc = v; 18601da177e4SLinus Torvalds const struct ipmr_mfc_iter *it = seq->private; 18611da177e4SLinus Torvalds 1862999890b2SBenjamin Thery seq_printf(seq, "%08lX %08lX %-3hd", 18631da177e4SLinus Torvalds (unsigned long) mfc->mfc_mcastgrp, 18641da177e4SLinus Torvalds (unsigned long) mfc->mfc_origin, 18651ea472e2SBenjamin Thery mfc->mfc_parent); 18661ea472e2SBenjamin Thery 18671ea472e2SBenjamin Thery if (it->cache != &mfc_unres_queue) { 18681ea472e2SBenjamin Thery seq_printf(seq, " %8lu %8lu %8lu", 18691da177e4SLinus Torvalds mfc->mfc_un.res.pkt, 18701da177e4SLinus Torvalds mfc->mfc_un.res.bytes, 18711da177e4SLinus Torvalds mfc->mfc_un.res.wrong_if); 18721da177e4SLinus Torvalds for (n = mfc->mfc_un.res.minvif; 18731da177e4SLinus Torvalds n < mfc->mfc_un.res.maxvif; n++ ) { 1874cf958ae3SBenjamin Thery if (VIF_EXISTS(&init_net, n) && 1875cf958ae3SBenjamin Thery mfc->mfc_un.res.ttls[n] < 255) 18761da177e4SLinus Torvalds seq_printf(seq, 18771da177e4SLinus Torvalds " %2d:%-3d", 18781da177e4SLinus Torvalds n, mfc->mfc_un.res.ttls[n]); 18791da177e4SLinus Torvalds } 18801ea472e2SBenjamin Thery } else { 18811ea472e2SBenjamin Thery /* unresolved mfc_caches don't contain 18821ea472e2SBenjamin Thery * pkt, bytes and wrong_if values 18831ea472e2SBenjamin Thery */ 18841ea472e2SBenjamin Thery seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); 18851da177e4SLinus Torvalds } 18861da177e4SLinus Torvalds seq_putc(seq, '\n'); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds return 0; 18891da177e4SLinus Torvalds } 18901da177e4SLinus Torvalds 1891f690808eSStephen Hemminger static const struct seq_operations ipmr_mfc_seq_ops = { 18921da177e4SLinus Torvalds .start = ipmr_mfc_seq_start, 18931da177e4SLinus Torvalds .next = ipmr_mfc_seq_next, 18941da177e4SLinus Torvalds .stop = ipmr_mfc_seq_stop, 18951da177e4SLinus Torvalds .show = ipmr_mfc_seq_show, 18961da177e4SLinus Torvalds }; 18971da177e4SLinus Torvalds 18981da177e4SLinus Torvalds static int ipmr_mfc_open(struct inode *inode, struct file *file) 18991da177e4SLinus Torvalds { 1900cf7732e4SPavel Emelyanov return seq_open_private(file, &ipmr_mfc_seq_ops, 1901cf7732e4SPavel Emelyanov sizeof(struct ipmr_mfc_iter)); 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds 19049a32144eSArjan van de Ven static const struct file_operations ipmr_mfc_fops = { 19051da177e4SLinus Torvalds .owner = THIS_MODULE, 19061da177e4SLinus Torvalds .open = ipmr_mfc_open, 19071da177e4SLinus Torvalds .read = seq_read, 19081da177e4SLinus Torvalds .llseek = seq_lseek, 19091da177e4SLinus Torvalds .release = seq_release_private, 19101da177e4SLinus Torvalds }; 19111da177e4SLinus Torvalds #endif 19121da177e4SLinus Torvalds 19131da177e4SLinus Torvalds #ifdef CONFIG_IP_PIMSM_V2 19141da177e4SLinus Torvalds static struct net_protocol pim_protocol = { 19151da177e4SLinus Torvalds .handler = pim_rcv, 19161da177e4SLinus Torvalds }; 19171da177e4SLinus Torvalds #endif 19181da177e4SLinus Torvalds 19191da177e4SLinus Torvalds 19201da177e4SLinus Torvalds /* 19211da177e4SLinus Torvalds * Setup for IP multicast routing 19221da177e4SLinus Torvalds */ 1923cf958ae3SBenjamin Thery static int __net_init ipmr_net_init(struct net *net) 1924cf958ae3SBenjamin Thery { 1925cf958ae3SBenjamin Thery int err = 0; 1926cf958ae3SBenjamin Thery 1927cf958ae3SBenjamin Thery net->ipv4.vif_table = kcalloc(MAXVIFS, sizeof(struct vif_device), 1928cf958ae3SBenjamin Thery GFP_KERNEL); 1929cf958ae3SBenjamin Thery if (!net->ipv4.vif_table) { 1930cf958ae3SBenjamin Thery err = -ENOMEM; 1931cf958ae3SBenjamin Thery goto fail; 1932cf958ae3SBenjamin Thery } 1933*2bb8b26cSBenjamin Thery 1934*2bb8b26cSBenjamin Thery /* Forwarding cache */ 1935*2bb8b26cSBenjamin Thery net->ipv4.mfc_cache_array = kcalloc(MFC_LINES, 1936*2bb8b26cSBenjamin Thery sizeof(struct mfc_cache *), 1937*2bb8b26cSBenjamin Thery GFP_KERNEL); 1938*2bb8b26cSBenjamin Thery if (!net->ipv4.mfc_cache_array) { 1939*2bb8b26cSBenjamin Thery err = -ENOMEM; 1940*2bb8b26cSBenjamin Thery goto fail_mfc_cache; 1941*2bb8b26cSBenjamin Thery } 1942*2bb8b26cSBenjamin Thery return 0; 1943*2bb8b26cSBenjamin Thery 1944*2bb8b26cSBenjamin Thery fail_mfc_cache: 1945*2bb8b26cSBenjamin Thery kfree(net->ipv4.vif_table); 1946cf958ae3SBenjamin Thery fail: 1947cf958ae3SBenjamin Thery return err; 1948cf958ae3SBenjamin Thery } 1949cf958ae3SBenjamin Thery 1950cf958ae3SBenjamin Thery static void __net_exit ipmr_net_exit(struct net *net) 1951cf958ae3SBenjamin Thery { 1952*2bb8b26cSBenjamin Thery kfree(net->ipv4.mfc_cache_array); 1953cf958ae3SBenjamin Thery kfree(net->ipv4.vif_table); 1954cf958ae3SBenjamin Thery } 1955cf958ae3SBenjamin Thery 1956cf958ae3SBenjamin Thery static struct pernet_operations ipmr_net_ops = { 1957cf958ae3SBenjamin Thery .init = ipmr_net_init, 1958cf958ae3SBenjamin Thery .exit = ipmr_net_exit, 1959cf958ae3SBenjamin Thery }; 19601da177e4SLinus Torvalds 196103d2f897SWang Chen int __init ip_mr_init(void) 19621da177e4SLinus Torvalds { 196303d2f897SWang Chen int err; 196403d2f897SWang Chen 19651da177e4SLinus Torvalds mrt_cachep = kmem_cache_create("ip_mrt_cache", 19661da177e4SLinus Torvalds sizeof(struct mfc_cache), 1967e5d679f3SAlexey Dobriyan 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, 196820c2df83SPaul Mundt NULL); 196903d2f897SWang Chen if (!mrt_cachep) 197003d2f897SWang Chen return -ENOMEM; 197103d2f897SWang Chen 1972cf958ae3SBenjamin Thery err = register_pernet_subsys(&ipmr_net_ops); 1973cf958ae3SBenjamin Thery if (err) 1974cf958ae3SBenjamin Thery goto reg_pernet_fail; 1975cf958ae3SBenjamin Thery 1976b24b8a24SPavel Emelyanov setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0); 197703d2f897SWang Chen err = register_netdevice_notifier(&ip_mr_notifier); 197803d2f897SWang Chen if (err) 197903d2f897SWang Chen goto reg_notif_fail; 19801da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 198103d2f897SWang Chen err = -ENOMEM; 198203d2f897SWang Chen if (!proc_net_fops_create(&init_net, "ip_mr_vif", 0, &ipmr_vif_fops)) 198303d2f897SWang Chen goto proc_vif_fail; 198403d2f897SWang Chen if (!proc_net_fops_create(&init_net, "ip_mr_cache", 0, &ipmr_mfc_fops)) 198503d2f897SWang Chen goto proc_cache_fail; 19861da177e4SLinus Torvalds #endif 198703d2f897SWang Chen return 0; 198803d2f897SWang Chen #ifdef CONFIG_PROC_FS 198903d2f897SWang Chen proc_cache_fail: 199003d2f897SWang Chen proc_net_remove(&init_net, "ip_mr_vif"); 1991c3e38896SBenjamin Thery proc_vif_fail: 1992c3e38896SBenjamin Thery unregister_netdevice_notifier(&ip_mr_notifier); 199303d2f897SWang Chen #endif 1994c3e38896SBenjamin Thery reg_notif_fail: 1995c3e38896SBenjamin Thery del_timer(&ipmr_expire_timer); 1996cf958ae3SBenjamin Thery unregister_pernet_subsys(&ipmr_net_ops); 1997cf958ae3SBenjamin Thery reg_pernet_fail: 1998c3e38896SBenjamin Thery kmem_cache_destroy(mrt_cachep); 199903d2f897SWang Chen return err; 20001da177e4SLinus Torvalds } 2001