Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Multicast support for IPv6 |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3 | * Linux INET6 implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version |
| 13 | * 2 of the License, or (at your option) any later version. |
| 14 | */ |
| 15 | |
| 16 | /* Changes: |
| 17 | * |
| 18 | * yoshfuji : fix format of router-alert option |
| 19 | * YOSHIFUJI Hideaki @USAGI: |
| 20 | * Fixed source address for MLD message based on |
| 21 | * <draft-ietf-magma-mld-source-05.txt>. |
| 22 | * YOSHIFUJI Hideaki @USAGI: |
| 23 | * - Ignore Queries for invalid addresses. |
| 24 | * - MLD for link-local addresses. |
| 25 | * David L Stevens <dlstevens@us.ibm.com>: |
| 26 | * - MLDv2 support |
| 27 | */ |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | #include <linux/errno.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/socket.h> |
| 34 | #include <linux/sockios.h> |
| 35 | #include <linux/jiffies.h> |
| 36 | #include <linux/times.h> |
| 37 | #include <linux/net.h> |
| 38 | #include <linux/in.h> |
| 39 | #include <linux/in6.h> |
| 40 | #include <linux/netdevice.h> |
| 41 | #include <linux/if_arp.h> |
| 42 | #include <linux/route.h> |
| 43 | #include <linux/init.h> |
| 44 | #include <linux/proc_fs.h> |
| 45 | #include <linux/seq_file.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 47 | #include <net/mld.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include <linux/netfilter.h> |
| 50 | #include <linux/netfilter_ipv6.h> |
| 51 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 52 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <net/sock.h> |
| 54 | #include <net/snmp.h> |
| 55 | |
| 56 | #include <net/ipv6.h> |
| 57 | #include <net/protocol.h> |
| 58 | #include <net/if_inet6.h> |
| 59 | #include <net/ndisc.h> |
| 60 | #include <net/addrconf.h> |
| 61 | #include <net/ip6_route.h> |
Denis V. Lunev | 1ed8516 | 2008-04-03 14:31:03 -0700 | [diff] [blame] | 62 | #include <net/inet_common.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | #include <net/ip6_checksum.h> |
| 65 | |
| 66 | /* Set to 3 to get tracing... */ |
| 67 | #define MCAST_DEBUG 2 |
| 68 | |
| 69 | #if MCAST_DEBUG >= 3 |
| 70 | #define MDBG(x) printk x |
| 71 | #else |
| 72 | #define MDBG(x) |
| 73 | #endif |
| 74 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 75 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
| 76 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { |
| 77 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), |
| 78 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), |
| 79 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; |
| 83 | |
| 84 | /* Big mc list lock for all the sockets */ |
| 85 | static DEFINE_RWLOCK(ipv6_sk_mc_lock); |
| 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
| 88 | static void igmp6_leave_group(struct ifmcaddr6 *ma); |
| 89 | static void igmp6_timer_handler(unsigned long data); |
| 90 | |
| 91 | static void mld_gq_timer_expire(unsigned long data); |
| 92 | static void mld_ifc_timer_expire(unsigned long data); |
| 93 | static void mld_ifc_event(struct inet6_dev *idev); |
| 94 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); |
| 95 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); |
| 96 | static void mld_clear_delrec(struct inet6_dev *idev); |
| 97 | static int sf_setstate(struct ifmcaddr6 *pmc); |
| 98 | static void sf_markstate(struct ifmcaddr6 *pmc); |
| 99 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); |
| 100 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 101 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 102 | int delta); |
| 103 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 104 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 105 | int delta); |
| 106 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, |
| 107 | struct inet6_dev *idev); |
| 108 | |
| 109 | |
| 110 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) |
| 111 | #define MLD_QRV_DEFAULT 2 |
| 112 | |
YOSHIFUJI Hideaki | 53b7997 | 2008-07-19 22:35:03 -0700 | [diff] [blame] | 113 | #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | (idev)->cnf.force_mld_version == 1 || \ |
| 115 | ((idev)->mc_v1_seen && \ |
| 116 | time_before(jiffies, (idev)->mc_v1_seen))) |
| 117 | |
David L Stevens | 6f4353d | 2005-12-26 17:03:46 -0800 | [diff] [blame] | 118 | #define IPV6_MLD_MAX_MSF 64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 120 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * socket join on multicast group |
| 124 | */ |
| 125 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 126 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | { |
| 128 | struct net_device *dev = NULL; |
| 129 | struct ipv6_mc_socklist *mc_lst; |
| 130 | struct ipv6_pinfo *np = inet6_sk(sk); |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 131 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | int err; |
| 133 | |
| 134 | if (!ipv6_addr_is_multicast(addr)) |
| 135 | return -EINVAL; |
| 136 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 137 | read_lock_bh(&ipv6_sk_mc_lock); |
| 138 | for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) { |
| 139 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
| 140 | ipv6_addr_equal(&mc_lst->addr, addr)) { |
| 141 | read_unlock_bh(&ipv6_sk_mc_lock); |
| 142 | return -EADDRINUSE; |
| 143 | } |
| 144 | } |
| 145 | read_unlock_bh(&ipv6_sk_mc_lock); |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
| 148 | |
| 149 | if (mc_lst == NULL) |
| 150 | return -ENOMEM; |
| 151 | |
| 152 | mc_lst->next = NULL; |
| 153 | ipv6_addr_copy(&mc_lst->addr, addr); |
| 154 | |
| 155 | if (ifindex == 0) { |
| 156 | struct rt6_info *rt; |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 157 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | if (rt) { |
| 159 | dev = rt->rt6i_dev; |
| 160 | dev_hold(dev); |
| 161 | dst_release(&rt->u.dst); |
| 162 | } |
| 163 | } else |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 164 | dev = dev_get_by_index(net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | if (dev == NULL) { |
| 167 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 168 | return -ENODEV; |
| 169 | } |
| 170 | |
| 171 | mc_lst->ifindex = dev->ifindex; |
| 172 | mc_lst->sfmode = MCAST_EXCLUDE; |
YOSHIFUJI Hideaki | 196433c | 2006-01-04 13:56:31 -0800 | [diff] [blame] | 173 | rwlock_init(&mc_lst->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | mc_lst->sflist = NULL; |
| 175 | |
| 176 | /* |
| 177 | * now add/increase the group membership on the device |
| 178 | */ |
| 179 | |
| 180 | err = ipv6_dev_mc_inc(dev, addr); |
| 181 | |
| 182 | if (err) { |
| 183 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 184 | dev_put(dev); |
| 185 | return err; |
| 186 | } |
| 187 | |
| 188 | write_lock_bh(&ipv6_sk_mc_lock); |
| 189 | mc_lst->next = np->ipv6_mc_list; |
| 190 | np->ipv6_mc_list = mc_lst; |
| 191 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 192 | |
| 193 | dev_put(dev); |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * socket leave on multicast group |
| 200 | */ |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 201 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
| 203 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 204 | struct ipv6_mc_socklist *mc_lst, **lnk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 205 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | write_lock_bh(&ipv6_sk_mc_lock); |
| 208 | for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) { |
| 209 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
| 210 | ipv6_addr_equal(&mc_lst->addr, addr)) { |
| 211 | struct net_device *dev; |
| 212 | |
| 213 | *lnk = mc_lst->next; |
| 214 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 215 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 216 | dev = dev_get_by_index(net, mc_lst->ifindex); |
| 217 | if (dev != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | struct inet6_dev *idev = in6_dev_get(dev); |
| 219 | |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 220 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
| 223 | in6_dev_put(idev); |
| 224 | } |
| 225 | dev_put(dev); |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 226 | } else |
| 227 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 229 | return 0; |
| 230 | } |
| 231 | } |
| 232 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 233 | |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 234 | return -EADDRNOTAVAIL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 237 | static struct inet6_dev *ip6_mc_find_dev(struct net *net, |
| 238 | struct in6_addr *group, |
| 239 | int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | struct net_device *dev = NULL; |
| 242 | struct inet6_dev *idev = NULL; |
| 243 | |
| 244 | if (ifindex == 0) { |
| 245 | struct rt6_info *rt; |
| 246 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 247 | rt = rt6_lookup(net, group, NULL, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (rt) { |
| 249 | dev = rt->rt6i_dev; |
| 250 | dev_hold(dev); |
| 251 | dst_release(&rt->u.dst); |
| 252 | } |
| 253 | } else |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 254 | dev = dev_get_by_index(net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | if (!dev) |
Ilpo Järvinen | 448eb71 | 2008-12-14 23:15:21 -0800 | [diff] [blame] | 257 | goto nodev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | idev = in6_dev_get(dev); |
Ilpo Järvinen | 448eb71 | 2008-12-14 23:15:21 -0800 | [diff] [blame] | 259 | if (!idev) |
| 260 | goto release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | read_lock_bh(&idev->lock); |
Ilpo Järvinen | 448eb71 | 2008-12-14 23:15:21 -0800 | [diff] [blame] | 262 | if (idev->dead) |
| 263 | goto unlock_release; |
| 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return idev; |
Ilpo Järvinen | 448eb71 | 2008-12-14 23:15:21 -0800 | [diff] [blame] | 266 | |
| 267 | unlock_release: |
| 268 | read_unlock_bh(&idev->lock); |
| 269 | in6_dev_put(idev); |
| 270 | release: |
| 271 | dev_put(dev); |
| 272 | nodev: |
| 273 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | void ipv6_sock_mc_close(struct sock *sk) |
| 277 | { |
| 278 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 279 | struct ipv6_mc_socklist *mc_lst; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 280 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
| 282 | write_lock_bh(&ipv6_sk_mc_lock); |
| 283 | while ((mc_lst = np->ipv6_mc_list) != NULL) { |
| 284 | struct net_device *dev; |
| 285 | |
| 286 | np->ipv6_mc_list = mc_lst->next; |
| 287 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 288 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 289 | dev = dev_get_by_index(net, mc_lst->ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | if (dev) { |
| 291 | struct inet6_dev *idev = in6_dev_get(dev); |
| 292 | |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 293 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
| 296 | in6_dev_put(idev); |
| 297 | } |
| 298 | dev_put(dev); |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 299 | } else |
| 300 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 303 | |
| 304 | write_lock_bh(&ipv6_sk_mc_lock); |
| 305 | } |
| 306 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 307 | } |
| 308 | |
| 309 | int ip6_mc_source(int add, int omode, struct sock *sk, |
| 310 | struct group_source_req *pgsr) |
| 311 | { |
| 312 | struct in6_addr *source, *group; |
| 313 | struct ipv6_mc_socklist *pmc; |
| 314 | struct net_device *dev; |
| 315 | struct inet6_dev *idev; |
| 316 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 317 | struct ip6_sf_socklist *psl; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 318 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | int i, j, rv; |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 320 | int leavegroup = 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 321 | int pmclocked = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | int err; |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
| 325 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; |
| 326 | |
| 327 | if (!ipv6_addr_is_multicast(group)) |
| 328 | return -EINVAL; |
| 329 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 330 | idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (!idev) |
| 332 | return -ENODEV; |
| 333 | dev = idev->dev; |
| 334 | |
| 335 | err = -EADDRNOTAVAIL; |
| 336 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 337 | read_lock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 339 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
| 340 | continue; |
| 341 | if (ipv6_addr_equal(&pmc->addr, group)) |
| 342 | break; |
| 343 | } |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 344 | if (!pmc) { /* must have a prior join */ |
| 345 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* if a source filter was set, must be the same mode as before */ |
| 349 | if (pmc->sflist) { |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 350 | if (pmc->sfmode != omode) { |
| 351 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 353 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } else if (pmc->sfmode != omode) { |
| 355 | /* allow mode switches for empty-set filters */ |
| 356 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); |
| 357 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); |
| 358 | pmc->sfmode = omode; |
| 359 | } |
| 360 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 361 | write_lock_bh(&pmc->sflock); |
| 362 | pmclocked = 1; |
| 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | psl = pmc->sflist; |
| 365 | if (!add) { |
| 366 | if (!psl) |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 367 | goto done; /* err = -EADDRNOTAVAIL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | rv = !0; |
| 369 | for (i=0; i<psl->sl_count; i++) { |
| 370 | rv = memcmp(&psl->sl_addr[i], source, |
| 371 | sizeof(struct in6_addr)); |
| 372 | if (rv == 0) |
| 373 | break; |
| 374 | } |
| 375 | if (rv) /* source not found */ |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 376 | goto done; /* err = -EADDRNOTAVAIL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 378 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
| 379 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { |
| 380 | leavegroup = 1; |
| 381 | goto done; |
| 382 | } |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* update the interface filter */ |
| 385 | ip6_mc_del_src(idev, group, omode, 1, source, 1); |
| 386 | |
| 387 | for (j=i+1; j<psl->sl_count; j++) |
| 388 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
| 389 | psl->sl_count--; |
| 390 | err = 0; |
| 391 | goto done; |
| 392 | } |
| 393 | /* else, add a new source to the filter */ |
| 394 | |
| 395 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { |
| 396 | err = -ENOBUFS; |
| 397 | goto done; |
| 398 | } |
| 399 | if (!psl || psl->sl_count == psl->sl_max) { |
| 400 | struct ip6_sf_socklist *newpsl; |
| 401 | int count = IP6_SFBLOCK; |
| 402 | |
| 403 | if (psl) |
| 404 | count += psl->sl_max; |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 405 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (!newpsl) { |
| 407 | err = -ENOBUFS; |
| 408 | goto done; |
| 409 | } |
| 410 | newpsl->sl_max = count; |
| 411 | newpsl->sl_count = count - IP6_SFBLOCK; |
| 412 | if (psl) { |
| 413 | for (i=0; i<psl->sl_count; i++) |
| 414 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
| 415 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); |
| 416 | } |
| 417 | pmc->sflist = psl = newpsl; |
| 418 | } |
| 419 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ |
| 420 | for (i=0; i<psl->sl_count; i++) { |
| 421 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); |
| 422 | if (rv == 0) |
| 423 | break; |
| 424 | } |
| 425 | if (rv == 0) /* address already there is an error */ |
| 426 | goto done; |
| 427 | for (j=psl->sl_count-1; j>=i; j--) |
| 428 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
| 429 | psl->sl_addr[i] = *source; |
| 430 | psl->sl_count++; |
| 431 | err = 0; |
| 432 | /* update the interface list */ |
| 433 | ip6_mc_add_src(idev, group, omode, 1, source, 1); |
| 434 | done: |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 435 | if (pmclocked) |
| 436 | write_unlock_bh(&pmc->sflock); |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 437 | read_unlock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | read_unlock_bh(&idev->lock); |
| 439 | in6_dev_put(idev); |
| 440 | dev_put(dev); |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 441 | if (leavegroup) |
| 442 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | return err; |
| 444 | } |
| 445 | |
| 446 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) |
| 447 | { |
| 448 | struct in6_addr *group; |
| 449 | struct ipv6_mc_socklist *pmc; |
| 450 | struct net_device *dev; |
| 451 | struct inet6_dev *idev; |
| 452 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 453 | struct ip6_sf_socklist *newpsl, *psl; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 454 | struct net *net = sock_net(sk); |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 455 | int leavegroup = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | int i, err; |
| 457 | |
| 458 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; |
| 459 | |
| 460 | if (!ipv6_addr_is_multicast(group)) |
| 461 | return -EINVAL; |
| 462 | if (gsf->gf_fmode != MCAST_INCLUDE && |
| 463 | gsf->gf_fmode != MCAST_EXCLUDE) |
| 464 | return -EINVAL; |
| 465 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 466 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | if (!idev) |
| 469 | return -ENODEV; |
| 470 | dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
David S. Miller | 9c05989 | 2005-07-08 21:44:39 -0700 | [diff] [blame] | 472 | err = 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 473 | read_lock_bh(&ipv6_sk_mc_lock); |
| 474 | |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 475 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
| 476 | leavegroup = 1; |
| 477 | goto done; |
| 478 | } |
| 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 481 | if (pmc->ifindex != gsf->gf_interface) |
| 482 | continue; |
| 483 | if (ipv6_addr_equal(&pmc->addr, group)) |
| 484 | break; |
| 485 | } |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 486 | if (!pmc) { /* must have a prior join */ |
| 487 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (gsf->gf_numsrc) { |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 491 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
| 492 | GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | if (!newpsl) { |
| 494 | err = -ENOBUFS; |
| 495 | goto done; |
| 496 | } |
| 497 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; |
| 498 | for (i=0; i<newpsl->sl_count; ++i) { |
| 499 | struct sockaddr_in6 *psin6; |
| 500 | |
| 501 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; |
| 502 | newpsl->sl_addr[i] = psin6->sin6_addr; |
| 503 | } |
| 504 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, |
| 505 | newpsl->sl_count, newpsl->sl_addr, 0); |
| 506 | if (err) { |
| 507 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); |
| 508 | goto done; |
| 509 | } |
Yan Zheng | 8713dbf | 2005-10-28 08:02:08 +0800 | [diff] [blame] | 510 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | newpsl = NULL; |
Yan Zheng | 8713dbf | 2005-10-28 08:02:08 +0800 | [diff] [blame] | 512 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
| 513 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 514 | |
| 515 | write_lock_bh(&pmc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | psl = pmc->sflist; |
| 517 | if (psl) { |
| 518 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, |
| 519 | psl->sl_count, psl->sl_addr, 0); |
| 520 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); |
| 521 | } else |
| 522 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); |
| 523 | pmc->sflist = newpsl; |
| 524 | pmc->sfmode = gsf->gf_fmode; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 525 | write_unlock_bh(&pmc->sflock); |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 526 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | done: |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 528 | read_unlock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | read_unlock_bh(&idev->lock); |
| 530 | in6_dev_put(idev); |
| 531 | dev_put(dev); |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 532 | if (leavegroup) |
| 533 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | return err; |
| 535 | } |
| 536 | |
| 537 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
| 538 | struct group_filter __user *optval, int __user *optlen) |
| 539 | { |
| 540 | int err, i, count, copycount; |
| 541 | struct in6_addr *group; |
| 542 | struct ipv6_mc_socklist *pmc; |
| 543 | struct inet6_dev *idev; |
| 544 | struct net_device *dev; |
| 545 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 546 | struct ip6_sf_socklist *psl; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 547 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; |
| 550 | |
| 551 | if (!ipv6_addr_is_multicast(group)) |
| 552 | return -EINVAL; |
| 553 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 554 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | if (!idev) |
| 557 | return -ENODEV; |
| 558 | |
| 559 | dev = idev->dev; |
| 560 | |
| 561 | err = -EADDRNOTAVAIL; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 562 | /* |
| 563 | * changes to the ipv6_mc_list require the socket lock and |
| 564 | * a read lock on ip6_sk_mc_lock. We have the socket lock, |
| 565 | * so reading the list is safe. |
| 566 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
| 568 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 569 | if (pmc->ifindex != gsf->gf_interface) |
| 570 | continue; |
| 571 | if (ipv6_addr_equal(group, &pmc->addr)) |
| 572 | break; |
| 573 | } |
| 574 | if (!pmc) /* must have a prior join */ |
| 575 | goto done; |
| 576 | gsf->gf_fmode = pmc->sfmode; |
| 577 | psl = pmc->sflist; |
| 578 | count = psl ? psl->sl_count : 0; |
| 579 | read_unlock_bh(&idev->lock); |
| 580 | in6_dev_put(idev); |
| 581 | dev_put(dev); |
| 582 | |
| 583 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; |
| 584 | gsf->gf_numsrc = count; |
| 585 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || |
| 586 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { |
| 587 | return -EFAULT; |
| 588 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 589 | /* changes to psl require the socket lock, a read lock on |
| 590 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We |
| 591 | * have the socket lock, so reading here is safe. |
| 592 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | for (i=0; i<copycount; i++) { |
| 594 | struct sockaddr_in6 *psin6; |
| 595 | struct sockaddr_storage ss; |
| 596 | |
| 597 | psin6 = (struct sockaddr_in6 *)&ss; |
| 598 | memset(&ss, 0, sizeof(ss)); |
| 599 | psin6->sin6_family = AF_INET6; |
| 600 | psin6->sin6_addr = psl->sl_addr[i]; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 601 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | return -EFAULT; |
| 603 | } |
| 604 | return 0; |
| 605 | done: |
| 606 | read_unlock_bh(&idev->lock); |
| 607 | in6_dev_put(idev); |
| 608 | dev_put(dev); |
| 609 | return err; |
| 610 | } |
| 611 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 612 | int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
| 613 | const struct in6_addr *src_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | { |
| 615 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 616 | struct ipv6_mc_socklist *mc; |
| 617 | struct ip6_sf_socklist *psl; |
| 618 | int rv = 1; |
| 619 | |
| 620 | read_lock(&ipv6_sk_mc_lock); |
| 621 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { |
| 622 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
| 623 | break; |
| 624 | } |
| 625 | if (!mc) { |
| 626 | read_unlock(&ipv6_sk_mc_lock); |
| 627 | return 1; |
| 628 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 629 | read_lock(&mc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | psl = mc->sflist; |
| 631 | if (!psl) { |
| 632 | rv = mc->sfmode == MCAST_EXCLUDE; |
| 633 | } else { |
| 634 | int i; |
| 635 | |
| 636 | for (i=0; i<psl->sl_count; i++) { |
| 637 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
| 638 | break; |
| 639 | } |
| 640 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) |
| 641 | rv = 0; |
| 642 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
| 643 | rv = 0; |
| 644 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 645 | read_unlock(&mc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | read_unlock(&ipv6_sk_mc_lock); |
| 647 | |
| 648 | return rv; |
| 649 | } |
| 650 | |
| 651 | static void ma_put(struct ifmcaddr6 *mc) |
| 652 | { |
| 653 | if (atomic_dec_and_test(&mc->mca_refcnt)) { |
| 654 | in6_dev_put(mc->idev); |
| 655 | kfree(mc); |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
| 660 | { |
| 661 | struct net_device *dev = mc->idev->dev; |
| 662 | char buf[MAX_ADDR_LEN]; |
| 663 | |
| 664 | spin_lock_bh(&mc->mca_lock); |
| 665 | if (!(mc->mca_flags&MAF_LOADED)) { |
| 666 | mc->mca_flags |= MAF_LOADED; |
| 667 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 668 | dev_mc_add(dev, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | spin_unlock_bh(&mc->mca_lock); |
| 671 | |
| 672 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) |
| 673 | return; |
| 674 | |
| 675 | if (MLD_V1_SEEN(mc->idev)) { |
| 676 | igmp6_join_group(mc); |
| 677 | return; |
| 678 | } |
| 679 | /* else v2 */ |
| 680 | |
| 681 | mc->mca_crcount = mc->idev->mc_qrv; |
| 682 | mld_ifc_event(mc->idev); |
| 683 | } |
| 684 | |
| 685 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) |
| 686 | { |
| 687 | struct net_device *dev = mc->idev->dev; |
| 688 | char buf[MAX_ADDR_LEN]; |
| 689 | |
| 690 | spin_lock_bh(&mc->mca_lock); |
| 691 | if (mc->mca_flags&MAF_LOADED) { |
| 692 | mc->mca_flags &= ~MAF_LOADED; |
| 693 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 694 | dev_mc_del(dev, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | if (mc->mca_flags & MAF_NOREPORT) |
| 698 | goto done; |
| 699 | spin_unlock_bh(&mc->mca_lock); |
| 700 | |
| 701 | if (!mc->idev->dead) |
| 702 | igmp6_leave_group(mc); |
| 703 | |
| 704 | spin_lock_bh(&mc->mca_lock); |
| 705 | if (del_timer(&mc->mca_timer)) |
| 706 | atomic_dec(&mc->mca_refcnt); |
| 707 | done: |
| 708 | ip6_mc_clear_src(mc); |
| 709 | spin_unlock_bh(&mc->mca_lock); |
| 710 | } |
| 711 | |
| 712 | /* |
| 713 | * deleted ifmcaddr6 manipulation |
| 714 | */ |
| 715 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) |
| 716 | { |
| 717 | struct ifmcaddr6 *pmc; |
| 718 | |
| 719 | /* this is an "ifmcaddr6" for convenience; only the fields below |
| 720 | * are actually used. In particular, the refcnt and users are not |
| 721 | * used for management of the delete list. Using the same structure |
| 722 | * for deleted items allows change reports to use common code with |
| 723 | * non-deleted or query-response MCA's. |
| 724 | */ |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 725 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | if (!pmc) |
| 727 | return; |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | spin_lock_bh(&im->mca_lock); |
| 730 | spin_lock_init(&pmc->mca_lock); |
| 731 | pmc->idev = im->idev; |
| 732 | in6_dev_hold(idev); |
| 733 | pmc->mca_addr = im->mca_addr; |
| 734 | pmc->mca_crcount = idev->mc_qrv; |
| 735 | pmc->mca_sfmode = im->mca_sfmode; |
| 736 | if (pmc->mca_sfmode == MCAST_INCLUDE) { |
| 737 | struct ip6_sf_list *psf; |
| 738 | |
| 739 | pmc->mca_tomb = im->mca_tomb; |
| 740 | pmc->mca_sources = im->mca_sources; |
| 741 | im->mca_tomb = im->mca_sources = NULL; |
| 742 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) |
| 743 | psf->sf_crcount = pmc->mca_crcount; |
| 744 | } |
| 745 | spin_unlock_bh(&im->mca_lock); |
| 746 | |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 747 | spin_lock_bh(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | pmc->next = idev->mc_tomb; |
| 749 | idev->mc_tomb = pmc; |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 750 | spin_unlock_bh(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) |
| 754 | { |
| 755 | struct ifmcaddr6 *pmc, *pmc_prev; |
| 756 | struct ip6_sf_list *psf, *psf_next; |
| 757 | |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 758 | spin_lock_bh(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | pmc_prev = NULL; |
| 760 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { |
| 761 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
| 762 | break; |
| 763 | pmc_prev = pmc; |
| 764 | } |
| 765 | if (pmc) { |
| 766 | if (pmc_prev) |
| 767 | pmc_prev->next = pmc->next; |
| 768 | else |
| 769 | idev->mc_tomb = pmc->next; |
| 770 | } |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 771 | spin_unlock_bh(&idev->mc_lock); |
| 772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (pmc) { |
| 774 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { |
| 775 | psf_next = psf->sf_next; |
| 776 | kfree(psf); |
| 777 | } |
| 778 | in6_dev_put(pmc->idev); |
| 779 | kfree(pmc); |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | static void mld_clear_delrec(struct inet6_dev *idev) |
| 784 | { |
| 785 | struct ifmcaddr6 *pmc, *nextpmc; |
| 786 | |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 787 | spin_lock_bh(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | pmc = idev->mc_tomb; |
| 789 | idev->mc_tomb = NULL; |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 790 | spin_unlock_bh(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | for (; pmc; pmc = nextpmc) { |
| 793 | nextpmc = pmc->next; |
| 794 | ip6_mc_clear_src(pmc); |
| 795 | in6_dev_put(pmc->idev); |
| 796 | kfree(pmc); |
| 797 | } |
| 798 | |
| 799 | /* clear dead sources, too */ |
| 800 | read_lock_bh(&idev->lock); |
| 801 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 802 | struct ip6_sf_list *psf, *psf_next; |
| 803 | |
| 804 | spin_lock_bh(&pmc->mca_lock); |
| 805 | psf = pmc->mca_tomb; |
| 806 | pmc->mca_tomb = NULL; |
| 807 | spin_unlock_bh(&pmc->mca_lock); |
| 808 | for (; psf; psf=psf_next) { |
| 809 | psf_next = psf->sf_next; |
| 810 | kfree(psf); |
| 811 | } |
| 812 | } |
| 813 | read_unlock_bh(&idev->lock); |
| 814 | } |
| 815 | |
| 816 | |
| 817 | /* |
| 818 | * device multicast group inc (add if not found) |
| 819 | */ |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 820 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | { |
| 822 | struct ifmcaddr6 *mc; |
| 823 | struct inet6_dev *idev; |
| 824 | |
| 825 | idev = in6_dev_get(dev); |
| 826 | |
| 827 | if (idev == NULL) |
| 828 | return -EINVAL; |
| 829 | |
| 830 | write_lock_bh(&idev->lock); |
| 831 | if (idev->dead) { |
| 832 | write_unlock_bh(&idev->lock); |
| 833 | in6_dev_put(idev); |
| 834 | return -ENODEV; |
| 835 | } |
| 836 | |
| 837 | for (mc = idev->mc_list; mc; mc = mc->next) { |
| 838 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { |
| 839 | mc->mca_users++; |
| 840 | write_unlock_bh(&idev->lock); |
| 841 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, |
| 842 | NULL, 0); |
| 843 | in6_dev_put(idev); |
| 844 | return 0; |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | /* |
| 849 | * not found: create a new one. |
| 850 | */ |
| 851 | |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 852 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
| 854 | if (mc == NULL) { |
| 855 | write_unlock_bh(&idev->lock); |
| 856 | in6_dev_put(idev); |
| 857 | return -ENOMEM; |
| 858 | } |
| 859 | |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 860 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
| 862 | ipv6_addr_copy(&mc->mca_addr, addr); |
| 863 | mc->idev = idev; |
| 864 | mc->mca_users = 1; |
| 865 | /* mca_stamp should be updated upon changes */ |
| 866 | mc->mca_cstamp = mc->mca_tstamp = jiffies; |
| 867 | atomic_set(&mc->mca_refcnt, 2); |
| 868 | spin_lock_init(&mc->mca_lock); |
| 869 | |
| 870 | /* initial mode is (EX, empty) */ |
| 871 | mc->mca_sfmode = MCAST_EXCLUDE; |
| 872 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; |
| 873 | |
| 874 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || |
| 875 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) |
| 876 | mc->mca_flags |= MAF_NOREPORT; |
| 877 | |
| 878 | mc->next = idev->mc_list; |
| 879 | idev->mc_list = mc; |
| 880 | write_unlock_bh(&idev->lock); |
| 881 | |
| 882 | mld_del_delrec(idev, &mc->mca_addr); |
| 883 | igmp6_group_added(mc); |
| 884 | ma_put(mc); |
| 885 | return 0; |
| 886 | } |
| 887 | |
| 888 | /* |
| 889 | * device multicast group del |
| 890 | */ |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 891 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
| 893 | struct ifmcaddr6 *ma, **map; |
| 894 | |
| 895 | write_lock_bh(&idev->lock); |
| 896 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { |
| 897 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
| 898 | if (--ma->mca_users == 0) { |
| 899 | *map = ma->next; |
| 900 | write_unlock_bh(&idev->lock); |
| 901 | |
| 902 | igmp6_group_dropped(ma); |
| 903 | |
| 904 | ma_put(ma); |
| 905 | return 0; |
| 906 | } |
| 907 | write_unlock_bh(&idev->lock); |
| 908 | return 0; |
| 909 | } |
| 910 | } |
| 911 | write_unlock_bh(&idev->lock); |
| 912 | |
| 913 | return -ENOENT; |
| 914 | } |
| 915 | |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 916 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | { |
| 918 | struct inet6_dev *idev = in6_dev_get(dev); |
| 919 | int err; |
| 920 | |
| 921 | if (!idev) |
| 922 | return -ENODEV; |
| 923 | |
| 924 | err = __ipv6_dev_mc_dec(idev, addr); |
| 925 | |
| 926 | in6_dev_put(idev); |
| 927 | |
| 928 | return err; |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * identify MLD packets for MLD filter exceptions |
| 933 | */ |
| 934 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) |
| 935 | { |
| 936 | struct icmp6hdr *pic; |
| 937 | |
| 938 | if (nexthdr != IPPROTO_ICMPV6) |
| 939 | return 0; |
| 940 | |
| 941 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) |
| 942 | return 0; |
| 943 | |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 944 | pic = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | switch (pic->icmp6_type) { |
| 947 | case ICMPV6_MGM_QUERY: |
| 948 | case ICMPV6_MGM_REPORT: |
| 949 | case ICMPV6_MGM_REDUCTION: |
| 950 | case ICMPV6_MLD2_REPORT: |
| 951 | return 1; |
| 952 | default: |
| 953 | break; |
| 954 | } |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | /* |
| 959 | * check if the interface/address pair is valid |
| 960 | */ |
YOSHIFUJI Hideaki | 9acd9f3 | 2008-04-10 15:42:10 +0900 | [diff] [blame] | 961 | int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
| 962 | const struct in6_addr *src_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | { |
| 964 | struct inet6_dev *idev; |
| 965 | struct ifmcaddr6 *mc; |
| 966 | int rv = 0; |
| 967 | |
| 968 | idev = in6_dev_get(dev); |
| 969 | if (idev) { |
| 970 | read_lock_bh(&idev->lock); |
| 971 | for (mc = idev->mc_list; mc; mc=mc->next) { |
| 972 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
| 973 | break; |
| 974 | } |
| 975 | if (mc) { |
| 976 | if (src_addr && !ipv6_addr_any(src_addr)) { |
| 977 | struct ip6_sf_list *psf; |
| 978 | |
| 979 | spin_lock_bh(&mc->mca_lock); |
| 980 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { |
| 981 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
| 982 | break; |
| 983 | } |
| 984 | if (psf) |
| 985 | rv = psf->sf_count[MCAST_INCLUDE] || |
| 986 | psf->sf_count[MCAST_EXCLUDE] != |
| 987 | mc->mca_sfcount[MCAST_EXCLUDE]; |
| 988 | else |
| 989 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; |
| 990 | spin_unlock_bh(&mc->mca_lock); |
| 991 | } else |
| 992 | rv = 1; /* don't filter unspecified source */ |
| 993 | } |
| 994 | read_unlock_bh(&idev->lock); |
| 995 | in6_dev_put(idev); |
| 996 | } |
| 997 | return rv; |
| 998 | } |
| 999 | |
| 1000 | static void mld_gq_start_timer(struct inet6_dev *idev) |
| 1001 | { |
| 1002 | int tv = net_random() % idev->mc_maxdelay; |
| 1003 | |
| 1004 | idev->mc_gq_running = 1; |
| 1005 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) |
| 1006 | in6_dev_hold(idev); |
| 1007 | } |
| 1008 | |
| 1009 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) |
| 1010 | { |
| 1011 | int tv = net_random() % delay; |
| 1012 | |
| 1013 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) |
| 1014 | in6_dev_hold(idev); |
| 1015 | } |
| 1016 | |
| 1017 | /* |
| 1018 | * IGMP handling (alias multicast ICMPv6 messages) |
| 1019 | */ |
| 1020 | |
| 1021 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) |
| 1022 | { |
| 1023 | unsigned long delay = resptime; |
| 1024 | |
| 1025 | /* Do not start timer for these addresses */ |
| 1026 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || |
| 1027 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) |
| 1028 | return; |
| 1029 | |
| 1030 | if (del_timer(&ma->mca_timer)) { |
| 1031 | atomic_dec(&ma->mca_refcnt); |
| 1032 | delay = ma->mca_timer.expires - jiffies; |
| 1033 | } |
| 1034 | |
| 1035 | if (delay >= resptime) { |
| 1036 | if (resptime) |
| 1037 | delay = net_random() % resptime; |
| 1038 | else |
| 1039 | delay = 1; |
| 1040 | } |
| 1041 | ma->mca_timer.expires = jiffies + delay; |
| 1042 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) |
| 1043 | atomic_inc(&ma->mca_refcnt); |
| 1044 | ma->mca_flags |= MAF_TIMER_RUNNING; |
| 1045 | } |
| 1046 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1047 | /* mark EXCLUDE-mode sources */ |
| 1048 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | struct in6_addr *srcs) |
| 1050 | { |
| 1051 | struct ip6_sf_list *psf; |
| 1052 | int i, scount; |
| 1053 | |
| 1054 | scount = 0; |
| 1055 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1056 | if (scount == nsrcs) |
| 1057 | break; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1058 | for (i=0; i<nsrcs; i++) { |
| 1059 | /* skip inactive filters */ |
| 1060 | if (pmc->mca_sfcount[MCAST_INCLUDE] || |
| 1061 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
| 1062 | psf->sf_count[MCAST_EXCLUDE]) |
| 1063 | continue; |
| 1064 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
| 1065 | scount++; |
| 1066 | break; |
| 1067 | } |
| 1068 | } |
| 1069 | } |
| 1070 | pmc->mca_flags &= ~MAF_GSQUERY; |
| 1071 | if (scount == nsrcs) /* all sources excluded */ |
| 1072 | return 0; |
| 1073 | return 1; |
| 1074 | } |
| 1075 | |
| 1076 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
| 1077 | struct in6_addr *srcs) |
| 1078 | { |
| 1079 | struct ip6_sf_list *psf; |
| 1080 | int i, scount; |
| 1081 | |
| 1082 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
| 1083 | return mld_xmarksources(pmc, nsrcs, srcs); |
| 1084 | |
| 1085 | /* mark INCLUDE-mode sources */ |
| 1086 | |
| 1087 | scount = 0; |
| 1088 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1089 | if (scount == nsrcs) |
| 1090 | break; |
| 1091 | for (i=0; i<nsrcs; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
| 1093 | psf->sf_gsresp = 1; |
| 1094 | scount++; |
| 1095 | break; |
| 1096 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1097 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1099 | if (!scount) { |
| 1100 | pmc->mca_flags &= ~MAF_GSQUERY; |
| 1101 | return 0; |
| 1102 | } |
| 1103 | pmc->mca_flags |= MAF_GSQUERY; |
| 1104 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | int igmp6_event_query(struct sk_buff *skb) |
| 1108 | { |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1109 | struct mld2_query *mlh2 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | struct ifmcaddr6 *ma; |
| 1111 | struct in6_addr *group; |
| 1112 | unsigned long max_delay; |
| 1113 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1114 | struct mld_msg *mld; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | int group_type; |
| 1116 | int mark = 0; |
| 1117 | int len; |
| 1118 | |
| 1119 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
| 1120 | return -EINVAL; |
| 1121 | |
| 1122 | /* compute payload length excluding extension headers */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1123 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
Arnaldo Carvalho de Melo | cfe1fc7 | 2007-03-16 17:26:39 -0300 | [diff] [blame] | 1124 | len -= skb_network_header_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
| 1126 | /* Drop queries with not link local source */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1127 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | return -EINVAL; |
| 1129 | |
| 1130 | idev = in6_dev_get(skb->dev); |
| 1131 | |
| 1132 | if (idev == NULL) |
| 1133 | return 0; |
| 1134 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1135 | mld = (struct mld_msg *)icmp6_hdr(skb); |
| 1136 | group = &mld->mld_mca; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | group_type = ipv6_addr_type(group); |
| 1138 | |
| 1139 | if (group_type != IPV6_ADDR_ANY && |
| 1140 | !(group_type&IPV6_ADDR_MULTICAST)) { |
| 1141 | in6_dev_put(idev); |
| 1142 | return -EINVAL; |
| 1143 | } |
| 1144 | |
| 1145 | if (len == 24) { |
| 1146 | int switchback; |
| 1147 | /* MLDv1 router present */ |
| 1148 | |
| 1149 | /* Translate milliseconds to jiffies */ |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1150 | max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | switchback = (idev->mc_qrv + 1) * max_delay; |
| 1153 | idev->mc_v1_seen = jiffies + switchback; |
| 1154 | |
| 1155 | /* cancel the interface change timer */ |
| 1156 | idev->mc_ifc_count = 0; |
| 1157 | if (del_timer(&idev->mc_ifc_timer)) |
| 1158 | __in6_dev_put(idev); |
| 1159 | /* clear deleted report items */ |
| 1160 | mld_clear_delrec(idev); |
| 1161 | } else if (len >= 28) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1162 | int srcs_offset = sizeof(struct mld2_query) - |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1163 | sizeof(struct icmp6hdr); |
| 1164 | if (!pskb_may_pull(skb, srcs_offset)) { |
| 1165 | in6_dev_put(idev); |
| 1166 | return -EINVAL; |
| 1167 | } |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1168 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1169 | max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | if (!max_delay) |
| 1171 | max_delay = 1; |
| 1172 | idev->mc_maxdelay = max_delay; |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1173 | if (mlh2->mld2q_qrv) |
| 1174 | idev->mc_qrv = mlh2->mld2q_qrv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1176 | if (mlh2->mld2q_nsrcs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | in6_dev_put(idev); |
| 1178 | return -EINVAL; /* no sources allowed */ |
| 1179 | } |
| 1180 | mld_gq_start_timer(idev); |
| 1181 | in6_dev_put(idev); |
| 1182 | return 0; |
| 1183 | } |
| 1184 | /* mark sources to include, if group & source-specific */ |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1185 | if (mlh2->mld2q_nsrcs != 0) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1186 | if (!pskb_may_pull(skb, srcs_offset + |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1187 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) { |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1188 | in6_dev_put(idev); |
| 1189 | return -EINVAL; |
| 1190 | } |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1191 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1192 | mark = 1; |
| 1193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } else { |
| 1195 | in6_dev_put(idev); |
| 1196 | return -EINVAL; |
| 1197 | } |
| 1198 | |
| 1199 | read_lock_bh(&idev->lock); |
| 1200 | if (group_type == IPV6_ADDR_ANY) { |
| 1201 | for (ma = idev->mc_list; ma; ma=ma->next) { |
| 1202 | spin_lock_bh(&ma->mca_lock); |
| 1203 | igmp6_group_queried(ma, max_delay); |
| 1204 | spin_unlock_bh(&ma->mca_lock); |
| 1205 | } |
| 1206 | } else { |
| 1207 | for (ma = idev->mc_list; ma; ma=ma->next) { |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1208 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | continue; |
| 1210 | spin_lock_bh(&ma->mca_lock); |
| 1211 | if (ma->mca_flags & MAF_TIMER_RUNNING) { |
| 1212 | /* gsquery <- gsquery && mark */ |
| 1213 | if (!mark) |
| 1214 | ma->mca_flags &= ~MAF_GSQUERY; |
| 1215 | } else { |
| 1216 | /* gsquery <- mark */ |
| 1217 | if (mark) |
| 1218 | ma->mca_flags |= MAF_GSQUERY; |
| 1219 | else |
| 1220 | ma->mca_flags &= ~MAF_GSQUERY; |
| 1221 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1222 | if (!(ma->mca_flags & MAF_GSQUERY) || |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1223 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1224 | igmp6_group_queried(ma, max_delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | spin_unlock_bh(&ma->mca_lock); |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1226 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | } |
| 1228 | } |
| 1229 | read_unlock_bh(&idev->lock); |
| 1230 | in6_dev_put(idev); |
| 1231 | |
| 1232 | return 0; |
| 1233 | } |
| 1234 | |
| 1235 | |
| 1236 | int igmp6_event_report(struct sk_buff *skb) |
| 1237 | { |
| 1238 | struct ifmcaddr6 *ma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1240 | struct mld_msg *mld; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | int addr_type; |
| 1242 | |
| 1243 | /* Our own report looped back. Ignore it. */ |
| 1244 | if (skb->pkt_type == PACKET_LOOPBACK) |
| 1245 | return 0; |
| 1246 | |
David Stevens | 24c6927 | 2005-12-02 20:32:59 -0800 | [diff] [blame] | 1247 | /* send our report if the MC router may not have heard this report */ |
| 1248 | if (skb->pkt_type != PACKET_MULTICAST && |
| 1249 | skb->pkt_type != PACKET_BROADCAST) |
| 1250 | return 0; |
| 1251 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1252 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | return -EINVAL; |
| 1254 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1255 | mld = (struct mld_msg *)icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | |
| 1257 | /* Drop reports with not link local source */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1258 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1259 | if (addr_type != IPV6_ADDR_ANY && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
| 1261 | return -EINVAL; |
| 1262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | idev = in6_dev_get(skb->dev); |
| 1264 | if (idev == NULL) |
| 1265 | return -ENODEV; |
| 1266 | |
| 1267 | /* |
| 1268 | * Cancel the timer for this group |
| 1269 | */ |
| 1270 | |
| 1271 | read_lock_bh(&idev->lock); |
| 1272 | for (ma = idev->mc_list; ma; ma=ma->next) { |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1273 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | spin_lock(&ma->mca_lock); |
| 1275 | if (del_timer(&ma->mca_timer)) |
| 1276 | atomic_dec(&ma->mca_refcnt); |
| 1277 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); |
| 1278 | spin_unlock(&ma->mca_lock); |
| 1279 | break; |
| 1280 | } |
| 1281 | } |
| 1282 | read_unlock_bh(&idev->lock); |
| 1283 | in6_dev_put(idev); |
| 1284 | return 0; |
| 1285 | } |
| 1286 | |
| 1287 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
| 1288 | int gdeleted, int sdeleted) |
| 1289 | { |
| 1290 | switch (type) { |
| 1291 | case MLD2_MODE_IS_INCLUDE: |
| 1292 | case MLD2_MODE_IS_EXCLUDE: |
| 1293 | if (gdeleted || sdeleted) |
| 1294 | return 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1295 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
| 1296 | if (pmc->mca_sfmode == MCAST_INCLUDE) |
| 1297 | return 1; |
| 1298 | /* don't include if this source is excluded |
| 1299 | * in all filters |
| 1300 | */ |
| 1301 | if (psf->sf_count[MCAST_INCLUDE]) |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1302 | return type == MLD2_MODE_IS_INCLUDE; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1303 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
| 1304 | psf->sf_count[MCAST_EXCLUDE]; |
| 1305 | } |
| 1306 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | case MLD2_CHANGE_TO_INCLUDE: |
| 1308 | if (gdeleted || sdeleted) |
| 1309 | return 0; |
| 1310 | return psf->sf_count[MCAST_INCLUDE] != 0; |
| 1311 | case MLD2_CHANGE_TO_EXCLUDE: |
| 1312 | if (gdeleted || sdeleted) |
| 1313 | return 0; |
| 1314 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
| 1315 | psf->sf_count[MCAST_INCLUDE]) |
| 1316 | return 0; |
| 1317 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
| 1318 | psf->sf_count[MCAST_EXCLUDE]; |
| 1319 | case MLD2_ALLOW_NEW_SOURCES: |
| 1320 | if (gdeleted || !psf->sf_crcount) |
| 1321 | return 0; |
| 1322 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
| 1323 | case MLD2_BLOCK_OLD_SOURCES: |
| 1324 | if (pmc->mca_sfmode == MCAST_INCLUDE) |
| 1325 | return gdeleted || (psf->sf_crcount && sdeleted); |
| 1326 | return psf->sf_crcount && !gdeleted && !sdeleted; |
| 1327 | } |
| 1328 | return 0; |
| 1329 | } |
| 1330 | |
| 1331 | static int |
| 1332 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) |
| 1333 | { |
| 1334 | struct ip6_sf_list *psf; |
| 1335 | int scount = 0; |
| 1336 | |
| 1337 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1338 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
| 1339 | continue; |
| 1340 | scount++; |
| 1341 | } |
| 1342 | return scount; |
| 1343 | } |
| 1344 | |
| 1345 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) |
| 1346 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1347 | struct net *net = dev_net(dev); |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 1348 | struct sock *sk = net->ipv6.igmp_sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | struct sk_buff *skb; |
| 1350 | struct mld2_report *pmr; |
| 1351 | struct in6_addr addr_buf; |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1352 | const struct in6_addr *saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | int err; |
| 1354 | u8 ra[8] = { IPPROTO_ICMPV6, 0, |
| 1355 | IPV6_TLV_ROUTERALERT, 2, 0, 0, |
| 1356 | IPV6_TLV_PADN, 0 }; |
| 1357 | |
| 1358 | /* we assume size > sizeof(ra) here */ |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 1359 | skb = sock_alloc_send_skb(sk, size + LL_ALLOCATED_SPACE(dev), 1, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 1361 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | return NULL; |
| 1363 | |
| 1364 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1366 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | /* <draft-ietf-magma-mld-source-05.txt>: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1368 | * use unspecified address as the source address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | * when a valid link-local address is not available. |
| 1370 | */ |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1371 | saddr = &in6addr_any; |
| 1372 | } else |
| 1373 | saddr = &addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1375 | ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
| 1377 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); |
| 1378 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1379 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
Arnaldo Carvalho de Melo | d10ba34 | 2007-03-14 21:05:37 -0300 | [diff] [blame] | 1380 | skb_put(skb, sizeof(*pmr)); |
| 1381 | pmr = (struct mld2_report *)skb_transport_header(skb); |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1382 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
| 1383 | pmr->mld2r_resv1 = 0; |
| 1384 | pmr->mld2r_cksum = 0; |
| 1385 | pmr->mld2r_resv2 = 0; |
| 1386 | pmr->mld2r_ngrec = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | return skb; |
| 1388 | } |
| 1389 | |
| 1390 | static void mld_sendpack(struct sk_buff *skb) |
| 1391 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1392 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1393 | struct mld2_report *pmr = |
| 1394 | (struct mld2_report *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | int payload_len, mldlen; |
| 1396 | struct inet6_dev *idev = in6_dev_get(skb->dev); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1397 | struct net *net = dev_net(skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | int err; |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1399 | struct flowi fl; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1400 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 1402 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
| 1403 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1404 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
| 1405 | mldlen = skb->tail - skb->transport_header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | pip6->payload_len = htons(payload_len); |
| 1407 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1408 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
| 1409 | IPPROTO_ICMPV6, |
| 1410 | csum_partial(skb_transport_header(skb), |
| 1411 | mldlen, 0)); |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1412 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1413 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1414 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1415 | if (!dst) { |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1416 | err = -ENOMEM; |
| 1417 | goto err_out; |
| 1418 | } |
| 1419 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 1420 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT, |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1421 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
| 1422 | skb->dev->ifindex); |
| 1423 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1424 | err = xfrm_lookup(net, &dst, &fl, NULL, 0); |
| 1425 | skb_dst_set(skb, dst); |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1426 | if (err) |
| 1427 | goto err_out; |
| 1428 | |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 1429 | payload_len = skb->len; |
| 1430 | |
Jan Engelhardt | b2e0b38 | 2010-03-23 04:09:07 +0100 | [diff] [blame] | 1431 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1432 | dst_output); |
| 1433 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | if (!err) { |
Denis V. Lunev | 5a57d4c | 2008-10-08 10:34:14 -0700 | [diff] [blame] | 1435 | ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT); |
Denis V. Lunev | e41b536 | 2008-10-08 10:33:26 -0700 | [diff] [blame] | 1436 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 1437 | IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | } else |
Denis V. Lunev | 483a47d | 2008-10-08 11:09:27 -0700 | [diff] [blame] | 1439 | IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
| 1441 | if (likely(idev != NULL)) |
| 1442 | in6_dev_put(idev); |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1443 | return; |
| 1444 | |
| 1445 | err_out: |
| 1446 | kfree_skb(skb); |
| 1447 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) |
| 1451 | { |
Yan Zheng | fab10fe | 2005-10-05 12:08:13 -0700 | [diff] [blame] | 1452 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, |
| 1456 | int type, struct mld2_grec **ppgr) |
| 1457 | { |
| 1458 | struct net_device *dev = pmc->idev->dev; |
| 1459 | struct mld2_report *pmr; |
| 1460 | struct mld2_grec *pgr; |
| 1461 | |
| 1462 | if (!skb) |
| 1463 | skb = mld_newpack(dev, dev->mtu); |
| 1464 | if (!skb) |
| 1465 | return NULL; |
| 1466 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); |
| 1467 | pgr->grec_type = type; |
| 1468 | pgr->grec_auxwords = 0; |
| 1469 | pgr->grec_nsrcs = 0; |
| 1470 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1471 | pmr = (struct mld2_report *)skb_transport_header(skb); |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1472 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | *ppgr = pgr; |
| 1474 | return skb; |
| 1475 | } |
| 1476 | |
| 1477 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ |
| 1478 | skb_tailroom(skb)) : 0) |
| 1479 | |
| 1480 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, |
| 1481 | int type, int gdeleted, int sdeleted) |
| 1482 | { |
| 1483 | struct net_device *dev = pmc->idev->dev; |
| 1484 | struct mld2_report *pmr; |
| 1485 | struct mld2_grec *pgr = NULL; |
| 1486 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1487 | int scount, stotal, first, isquery, truncate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
| 1489 | if (pmc->mca_flags & MAF_NOREPORT) |
| 1490 | return skb; |
| 1491 | |
| 1492 | isquery = type == MLD2_MODE_IS_INCLUDE || |
| 1493 | type == MLD2_MODE_IS_EXCLUDE; |
| 1494 | truncate = type == MLD2_MODE_IS_EXCLUDE || |
| 1495 | type == MLD2_CHANGE_TO_EXCLUDE; |
| 1496 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1497 | stotal = scount = 0; |
| 1498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
| 1500 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1501 | if (!*psf_list) |
| 1502 | goto empty_source; |
| 1503 | |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1504 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | |
| 1506 | /* EX and TO_EX get a fresh packet, if needed */ |
| 1507 | if (truncate) { |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1508 | if (pmr && pmr->mld2r_ngrec && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
| 1510 | if (skb) |
| 1511 | mld_sendpack(skb); |
| 1512 | skb = mld_newpack(dev, dev->mtu); |
| 1513 | } |
| 1514 | } |
| 1515 | first = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | psf_prev = NULL; |
| 1517 | for (psf=*psf_list; psf; psf=psf_next) { |
| 1518 | struct in6_addr *psrc; |
| 1519 | |
| 1520 | psf_next = psf->sf_next; |
| 1521 | |
| 1522 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { |
| 1523 | psf_prev = psf; |
| 1524 | continue; |
| 1525 | } |
| 1526 | |
| 1527 | /* clear marks on query responses */ |
| 1528 | if (isquery) |
| 1529 | psf->sf_gsresp = 0; |
| 1530 | |
| 1531 | if (AVAILABLE(skb) < sizeof(*psrc) + |
| 1532 | first*sizeof(struct mld2_grec)) { |
| 1533 | if (truncate && !first) |
| 1534 | break; /* truncate these */ |
| 1535 | if (pgr) |
| 1536 | pgr->grec_nsrcs = htons(scount); |
| 1537 | if (skb) |
| 1538 | mld_sendpack(skb); |
| 1539 | skb = mld_newpack(dev, dev->mtu); |
| 1540 | first = 1; |
| 1541 | scount = 0; |
| 1542 | } |
| 1543 | if (first) { |
| 1544 | skb = add_grhead(skb, pmc, type, &pgr); |
| 1545 | first = 0; |
| 1546 | } |
Alexey Dobriyan | cc63f70 | 2007-02-06 14:35:25 -0800 | [diff] [blame] | 1547 | if (!skb) |
| 1548 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
| 1550 | *psrc = psf->sf_addr; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1551 | scount++; stotal++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
| 1553 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { |
| 1554 | psf->sf_crcount--; |
| 1555 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { |
| 1556 | if (psf_prev) |
| 1557 | psf_prev->sf_next = psf->sf_next; |
| 1558 | else |
| 1559 | *psf_list = psf->sf_next; |
| 1560 | kfree(psf); |
| 1561 | continue; |
| 1562 | } |
| 1563 | } |
| 1564 | psf_prev = psf; |
| 1565 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1566 | |
| 1567 | empty_source: |
| 1568 | if (!stotal) { |
| 1569 | if (type == MLD2_ALLOW_NEW_SOURCES || |
| 1570 | type == MLD2_BLOCK_OLD_SOURCES) |
| 1571 | return skb; |
| 1572 | if (pmc->mca_crcount || isquery) { |
| 1573 | /* make sure we have room for group header */ |
| 1574 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { |
| 1575 | mld_sendpack(skb); |
| 1576 | skb = NULL; /* add_grhead will get a new one */ |
| 1577 | } |
| 1578 | skb = add_grhead(skb, pmc, type, &pgr); |
| 1579 | } |
| 1580 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | if (pgr) |
| 1582 | pgr->grec_nsrcs = htons(scount); |
| 1583 | |
| 1584 | if (isquery) |
| 1585 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ |
| 1586 | return skb; |
| 1587 | } |
| 1588 | |
| 1589 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) |
| 1590 | { |
| 1591 | struct sk_buff *skb = NULL; |
| 1592 | int type; |
| 1593 | |
| 1594 | if (!pmc) { |
| 1595 | read_lock_bh(&idev->lock); |
| 1596 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1597 | if (pmc->mca_flags & MAF_NOREPORT) |
| 1598 | continue; |
| 1599 | spin_lock_bh(&pmc->mca_lock); |
| 1600 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 1601 | type = MLD2_MODE_IS_EXCLUDE; |
| 1602 | else |
| 1603 | type = MLD2_MODE_IS_INCLUDE; |
| 1604 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1605 | spin_unlock_bh(&pmc->mca_lock); |
| 1606 | } |
| 1607 | read_unlock_bh(&idev->lock); |
| 1608 | } else { |
| 1609 | spin_lock_bh(&pmc->mca_lock); |
| 1610 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 1611 | type = MLD2_MODE_IS_EXCLUDE; |
| 1612 | else |
| 1613 | type = MLD2_MODE_IS_INCLUDE; |
| 1614 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1615 | spin_unlock_bh(&pmc->mca_lock); |
| 1616 | } |
| 1617 | if (skb) |
| 1618 | mld_sendpack(skb); |
| 1619 | } |
| 1620 | |
| 1621 | /* |
| 1622 | * remove zero-count source records from a source filter list |
| 1623 | */ |
| 1624 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) |
| 1625 | { |
| 1626 | struct ip6_sf_list *psf_prev, *psf_next, *psf; |
| 1627 | |
| 1628 | psf_prev = NULL; |
| 1629 | for (psf=*ppsf; psf; psf = psf_next) { |
| 1630 | psf_next = psf->sf_next; |
| 1631 | if (psf->sf_crcount == 0) { |
| 1632 | if (psf_prev) |
| 1633 | psf_prev->sf_next = psf->sf_next; |
| 1634 | else |
| 1635 | *ppsf = psf->sf_next; |
| 1636 | kfree(psf); |
| 1637 | } else |
| 1638 | psf_prev = psf; |
| 1639 | } |
| 1640 | } |
| 1641 | |
| 1642 | static void mld_send_cr(struct inet6_dev *idev) |
| 1643 | { |
| 1644 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; |
| 1645 | struct sk_buff *skb = NULL; |
| 1646 | int type, dtype; |
| 1647 | |
| 1648 | read_lock_bh(&idev->lock); |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 1649 | spin_lock(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | |
| 1651 | /* deleted MCA's */ |
| 1652 | pmc_prev = NULL; |
| 1653 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { |
| 1654 | pmc_next = pmc->next; |
| 1655 | if (pmc->mca_sfmode == MCAST_INCLUDE) { |
| 1656 | type = MLD2_BLOCK_OLD_SOURCES; |
| 1657 | dtype = MLD2_BLOCK_OLD_SOURCES; |
| 1658 | skb = add_grec(skb, pmc, type, 1, 0); |
| 1659 | skb = add_grec(skb, pmc, dtype, 1, 1); |
| 1660 | } |
| 1661 | if (pmc->mca_crcount) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
| 1663 | type = MLD2_CHANGE_TO_INCLUDE; |
| 1664 | skb = add_grec(skb, pmc, type, 1, 0); |
| 1665 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1666 | pmc->mca_crcount--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | if (pmc->mca_crcount == 0) { |
| 1668 | mld_clear_zeros(&pmc->mca_tomb); |
| 1669 | mld_clear_zeros(&pmc->mca_sources); |
| 1670 | } |
| 1671 | } |
| 1672 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && |
| 1673 | !pmc->mca_sources) { |
| 1674 | if (pmc_prev) |
| 1675 | pmc_prev->next = pmc_next; |
| 1676 | else |
| 1677 | idev->mc_tomb = pmc_next; |
| 1678 | in6_dev_put(pmc->idev); |
| 1679 | kfree(pmc); |
| 1680 | } else |
| 1681 | pmc_prev = pmc; |
| 1682 | } |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 1683 | spin_unlock(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | |
| 1685 | /* change recs */ |
| 1686 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1687 | spin_lock_bh(&pmc->mca_lock); |
| 1688 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1689 | type = MLD2_BLOCK_OLD_SOURCES; |
| 1690 | dtype = MLD2_ALLOW_NEW_SOURCES; |
| 1691 | } else { |
| 1692 | type = MLD2_ALLOW_NEW_SOURCES; |
| 1693 | dtype = MLD2_BLOCK_OLD_SOURCES; |
| 1694 | } |
| 1695 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1696 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ |
| 1697 | |
| 1698 | /* filter mode changes */ |
| 1699 | if (pmc->mca_crcount) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
| 1701 | type = MLD2_CHANGE_TO_EXCLUDE; |
| 1702 | else |
| 1703 | type = MLD2_CHANGE_TO_INCLUDE; |
| 1704 | skb = add_grec(skb, pmc, type, 0, 0); |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1705 | pmc->mca_crcount--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | } |
| 1707 | spin_unlock_bh(&pmc->mca_lock); |
| 1708 | } |
| 1709 | read_unlock_bh(&idev->lock); |
| 1710 | if (!skb) |
| 1711 | return; |
| 1712 | (void) mld_sendpack(skb); |
| 1713 | } |
| 1714 | |
| 1715 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) |
| 1716 | { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1717 | struct net *net = dev_net(dev); |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 1718 | struct sock *sk = net->ipv6.igmp_sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1720 | struct sk_buff *skb; |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1721 | struct mld_msg *hdr; |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1722 | const struct in6_addr *snd_addr, *saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | struct in6_addr addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | int err, len, payload_len, full_len; |
| 1725 | u8 ra[8] = { IPPROTO_ICMPV6, 0, |
| 1726 | IPV6_TLV_ROUTERALERT, 2, 0, 0, |
| 1727 | IPV6_TLV_PADN, 0 }; |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1728 | struct flowi fl; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1729 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1731 | if (type == ICMPV6_MGM_REDUCTION) |
| 1732 | snd_addr = &in6addr_linklocal_allrouters; |
| 1733 | else |
| 1734 | snd_addr = addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | |
| 1736 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); |
| 1737 | payload_len = len + sizeof(ra); |
| 1738 | full_len = sizeof(struct ipv6hdr) + payload_len; |
| 1739 | |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 1740 | rcu_read_lock(); |
| 1741 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), |
| 1742 | IPSTATS_MIB_OUT, full_len); |
| 1743 | rcu_read_unlock(); |
| 1744 | |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 1745 | skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + full_len, 1, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | |
| 1747 | if (skb == NULL) { |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1748 | rcu_read_lock(); |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1749 | IP6_INC_STATS(net, __in6_dev_get(dev), |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1750 | IPSTATS_MIB_OUTDISCARDS); |
| 1751 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | return; |
| 1753 | } |
| 1754 | |
| 1755 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1757 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | /* <draft-ietf-magma-mld-source-05.txt>: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1759 | * use unspecified address as the source address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | * when a valid link-local address is not available. |
| 1761 | */ |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1762 | saddr = &in6addr_any; |
| 1763 | } else |
| 1764 | saddr = &addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | |
YOSHIFUJI Hideaki | d7aabf2 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 1766 | ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | |
| 1768 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); |
| 1769 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1770 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
| 1771 | memset(hdr, 0, sizeof(struct mld_msg)); |
| 1772 | hdr->mld_type = type; |
| 1773 | ipv6_addr_copy(&hdr->mld_mca, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | |
YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame] | 1775 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
| 1776 | IPPROTO_ICMPV6, |
| 1777 | csum_partial(hdr, len, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | |
| 1779 | idev = in6_dev_get(skb->dev); |
| 1780 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1781 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
| 1782 | if (!dst) { |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1783 | err = -ENOMEM; |
| 1784 | goto err_out; |
| 1785 | } |
| 1786 | |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 1787 | icmpv6_flow_init(sk, &fl, type, |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1788 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
| 1789 | skb->dev->ifindex); |
| 1790 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1791 | err = xfrm_lookup(net, &dst, &fl, NULL, 0); |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1792 | if (err) |
| 1793 | goto err_out; |
| 1794 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1795 | skb_dst_set(skb, dst); |
Jan Engelhardt | b2e0b38 | 2010-03-23 04:09:07 +0100 | [diff] [blame] | 1796 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1797 | dst_output); |
| 1798 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | if (!err) { |
Denis V. Lunev | 5c5d244 | 2008-10-08 10:33:50 -0700 | [diff] [blame] | 1800 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
Denis V. Lunev | a862f6a | 2008-10-08 10:33:06 -0700 | [diff] [blame] | 1801 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 1802 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | } else |
Denis V. Lunev | 3bd653c | 2008-10-08 10:54:51 -0700 | [diff] [blame] | 1804 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | |
| 1806 | if (likely(idev != NULL)) |
| 1807 | in6_dev_put(idev); |
| 1808 | return; |
YOSHIFUJI Hideaki | 4192717 | 2007-12-06 17:40:56 -0800 | [diff] [blame] | 1809 | |
| 1810 | err_out: |
| 1811 | kfree_skb(skb); |
| 1812 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | } |
| 1814 | |
| 1815 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
| 1816 | struct in6_addr *psfsrc) |
| 1817 | { |
| 1818 | struct ip6_sf_list *psf, *psf_prev; |
| 1819 | int rv = 0; |
| 1820 | |
| 1821 | psf_prev = NULL; |
| 1822 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1823 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
| 1824 | break; |
| 1825 | psf_prev = psf; |
| 1826 | } |
| 1827 | if (!psf || psf->sf_count[sfmode] == 0) { |
| 1828 | /* source filter not found, or count wrong => bug */ |
| 1829 | return -ESRCH; |
| 1830 | } |
| 1831 | psf->sf_count[sfmode]--; |
| 1832 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { |
| 1833 | struct inet6_dev *idev = pmc->idev; |
| 1834 | |
| 1835 | /* no more filters for this source */ |
| 1836 | if (psf_prev) |
| 1837 | psf_prev->sf_next = psf->sf_next; |
| 1838 | else |
| 1839 | pmc->mca_sources = psf->sf_next; |
| 1840 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && |
| 1841 | !MLD_V1_SEEN(idev)) { |
| 1842 | psf->sf_crcount = idev->mc_qrv; |
| 1843 | psf->sf_next = pmc->mca_tomb; |
| 1844 | pmc->mca_tomb = psf; |
| 1845 | rv = 1; |
| 1846 | } else |
| 1847 | kfree(psf); |
| 1848 | } |
| 1849 | return rv; |
| 1850 | } |
| 1851 | |
| 1852 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 1853 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 1854 | int delta) |
| 1855 | { |
| 1856 | struct ifmcaddr6 *pmc; |
| 1857 | int changerec = 0; |
| 1858 | int i, err; |
| 1859 | |
| 1860 | if (!idev) |
| 1861 | return -ENODEV; |
| 1862 | read_lock_bh(&idev->lock); |
| 1863 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1864 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
| 1865 | break; |
| 1866 | } |
| 1867 | if (!pmc) { |
| 1868 | /* MCA not found?? bug */ |
| 1869 | read_unlock_bh(&idev->lock); |
| 1870 | return -ESRCH; |
| 1871 | } |
| 1872 | spin_lock_bh(&pmc->mca_lock); |
| 1873 | sf_markstate(pmc); |
| 1874 | if (!delta) { |
| 1875 | if (!pmc->mca_sfcount[sfmode]) { |
| 1876 | spin_unlock_bh(&pmc->mca_lock); |
| 1877 | read_unlock_bh(&idev->lock); |
| 1878 | return -EINVAL; |
| 1879 | } |
| 1880 | pmc->mca_sfcount[sfmode]--; |
| 1881 | } |
| 1882 | err = 0; |
| 1883 | for (i=0; i<sfcount; i++) { |
| 1884 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
| 1885 | |
| 1886 | changerec |= rv > 0; |
| 1887 | if (!err && rv < 0) |
| 1888 | err = rv; |
| 1889 | } |
| 1890 | if (pmc->mca_sfmode == MCAST_EXCLUDE && |
| 1891 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && |
| 1892 | pmc->mca_sfcount[MCAST_INCLUDE]) { |
| 1893 | struct ip6_sf_list *psf; |
| 1894 | |
| 1895 | /* filter mode change */ |
| 1896 | pmc->mca_sfmode = MCAST_INCLUDE; |
| 1897 | pmc->mca_crcount = idev->mc_qrv; |
| 1898 | idev->mc_ifc_count = pmc->mca_crcount; |
| 1899 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) |
| 1900 | psf->sf_crcount = 0; |
| 1901 | mld_ifc_event(pmc->idev); |
| 1902 | } else if (sf_setstate(pmc) || changerec) |
| 1903 | mld_ifc_event(pmc->idev); |
| 1904 | spin_unlock_bh(&pmc->mca_lock); |
| 1905 | read_unlock_bh(&idev->lock); |
| 1906 | return err; |
| 1907 | } |
| 1908 | |
| 1909 | /* |
| 1910 | * Add multicast single-source filter to the interface list |
| 1911 | */ |
| 1912 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, |
| 1913 | struct in6_addr *psfsrc, int delta) |
| 1914 | { |
| 1915 | struct ip6_sf_list *psf, *psf_prev; |
| 1916 | |
| 1917 | psf_prev = NULL; |
| 1918 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1919 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
| 1920 | break; |
| 1921 | psf_prev = psf; |
| 1922 | } |
| 1923 | if (!psf) { |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 1924 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | if (!psf) |
| 1926 | return -ENOBUFS; |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 1927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | psf->sf_addr = *psfsrc; |
| 1929 | if (psf_prev) { |
| 1930 | psf_prev->sf_next = psf; |
| 1931 | } else |
| 1932 | pmc->mca_sources = psf; |
| 1933 | } |
| 1934 | psf->sf_count[sfmode]++; |
| 1935 | return 0; |
| 1936 | } |
| 1937 | |
| 1938 | static void sf_markstate(struct ifmcaddr6 *pmc) |
| 1939 | { |
| 1940 | struct ip6_sf_list *psf; |
| 1941 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
| 1942 | |
| 1943 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) |
| 1944 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1945 | psf->sf_oldin = mca_xcount == |
| 1946 | psf->sf_count[MCAST_EXCLUDE] && |
| 1947 | !psf->sf_count[MCAST_INCLUDE]; |
| 1948 | } else |
| 1949 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; |
| 1950 | } |
| 1951 | |
| 1952 | static int sf_setstate(struct ifmcaddr6 *pmc) |
| 1953 | { |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1954 | struct ip6_sf_list *psf, *dpsf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
| 1956 | int qrv = pmc->idev->mc_qrv; |
| 1957 | int new_in, rv; |
| 1958 | |
| 1959 | rv = 0; |
| 1960 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1961 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1962 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && |
| 1963 | !psf->sf_count[MCAST_INCLUDE]; |
| 1964 | } else |
| 1965 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1966 | if (new_in) { |
| 1967 | if (!psf->sf_oldin) { |
Al Viro | e80e28b | 2006-02-03 20:10:03 -0500 | [diff] [blame] | 1968 | struct ip6_sf_list *prev = NULL; |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1969 | |
| 1970 | for (dpsf=pmc->mca_tomb; dpsf; |
| 1971 | dpsf=dpsf->sf_next) { |
| 1972 | if (ipv6_addr_equal(&dpsf->sf_addr, |
| 1973 | &psf->sf_addr)) |
| 1974 | break; |
| 1975 | prev = dpsf; |
| 1976 | } |
| 1977 | if (dpsf) { |
| 1978 | if (prev) |
| 1979 | prev->sf_next = dpsf->sf_next; |
| 1980 | else |
| 1981 | pmc->mca_tomb = dpsf->sf_next; |
| 1982 | kfree(dpsf); |
| 1983 | } |
| 1984 | psf->sf_crcount = qrv; |
| 1985 | rv++; |
| 1986 | } |
| 1987 | } else if (psf->sf_oldin) { |
| 1988 | psf->sf_crcount = 0; |
| 1989 | /* |
| 1990 | * add or update "delete" records if an active filter |
| 1991 | * is now inactive |
| 1992 | */ |
| 1993 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) |
| 1994 | if (ipv6_addr_equal(&dpsf->sf_addr, |
| 1995 | &psf->sf_addr)) |
| 1996 | break; |
| 1997 | if (!dpsf) { |
| 1998 | dpsf = (struct ip6_sf_list *) |
| 1999 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
| 2000 | if (!dpsf) |
| 2001 | continue; |
| 2002 | *dpsf = *psf; |
| 2003 | /* pmc->mca_lock held by callers */ |
| 2004 | dpsf->sf_next = pmc->mca_tomb; |
| 2005 | pmc->mca_tomb = dpsf; |
| 2006 | } |
| 2007 | dpsf->sf_crcount = qrv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | rv++; |
| 2009 | } |
| 2010 | } |
| 2011 | return rv; |
| 2012 | } |
| 2013 | |
| 2014 | /* |
| 2015 | * Add multicast source filter list to the interface list |
| 2016 | */ |
| 2017 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 2018 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 2019 | int delta) |
| 2020 | { |
| 2021 | struct ifmcaddr6 *pmc; |
| 2022 | int isexclude; |
| 2023 | int i, err; |
| 2024 | |
| 2025 | if (!idev) |
| 2026 | return -ENODEV; |
| 2027 | read_lock_bh(&idev->lock); |
| 2028 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 2029 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
| 2030 | break; |
| 2031 | } |
| 2032 | if (!pmc) { |
| 2033 | /* MCA not found?? bug */ |
| 2034 | read_unlock_bh(&idev->lock); |
| 2035 | return -ESRCH; |
| 2036 | } |
| 2037 | spin_lock_bh(&pmc->mca_lock); |
| 2038 | |
| 2039 | sf_markstate(pmc); |
| 2040 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; |
| 2041 | if (!delta) |
| 2042 | pmc->mca_sfcount[sfmode]++; |
| 2043 | err = 0; |
| 2044 | for (i=0; i<sfcount; i++) { |
| 2045 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); |
| 2046 | if (err) |
| 2047 | break; |
| 2048 | } |
| 2049 | if (err) { |
| 2050 | int j; |
| 2051 | |
| 2052 | if (!delta) |
| 2053 | pmc->mca_sfcount[sfmode]--; |
| 2054 | for (j=0; j<i; j++) |
| 2055 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
| 2056 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | struct ip6_sf_list *psf; |
| 2058 | |
| 2059 | /* filter mode change */ |
| 2060 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 2061 | pmc->mca_sfmode = MCAST_EXCLUDE; |
| 2062 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) |
| 2063 | pmc->mca_sfmode = MCAST_INCLUDE; |
| 2064 | /* else no filters; keep old mode for reports */ |
| 2065 | |
| 2066 | pmc->mca_crcount = idev->mc_qrv; |
| 2067 | idev->mc_ifc_count = pmc->mca_crcount; |
| 2068 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) |
| 2069 | psf->sf_crcount = 0; |
| 2070 | mld_ifc_event(idev); |
| 2071 | } else if (sf_setstate(pmc)) |
| 2072 | mld_ifc_event(idev); |
| 2073 | spin_unlock_bh(&pmc->mca_lock); |
| 2074 | read_unlock_bh(&idev->lock); |
| 2075 | return err; |
| 2076 | } |
| 2077 | |
| 2078 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) |
| 2079 | { |
| 2080 | struct ip6_sf_list *psf, *nextpsf; |
| 2081 | |
| 2082 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { |
| 2083 | nextpsf = psf->sf_next; |
| 2084 | kfree(psf); |
| 2085 | } |
| 2086 | pmc->mca_tomb = NULL; |
| 2087 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { |
| 2088 | nextpsf = psf->sf_next; |
| 2089 | kfree(psf); |
| 2090 | } |
| 2091 | pmc->mca_sources = NULL; |
| 2092 | pmc->mca_sfmode = MCAST_EXCLUDE; |
Denis Lukianov | de9daad | 2005-09-14 20:53:42 -0700 | [diff] [blame] | 2093 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
| 2095 | } |
| 2096 | |
| 2097 | |
| 2098 | static void igmp6_join_group(struct ifmcaddr6 *ma) |
| 2099 | { |
| 2100 | unsigned long delay; |
| 2101 | |
| 2102 | if (ma->mca_flags & MAF_NOREPORT) |
| 2103 | return; |
| 2104 | |
| 2105 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
| 2106 | |
| 2107 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; |
| 2108 | |
| 2109 | spin_lock_bh(&ma->mca_lock); |
| 2110 | if (del_timer(&ma->mca_timer)) { |
| 2111 | atomic_dec(&ma->mca_refcnt); |
| 2112 | delay = ma->mca_timer.expires - jiffies; |
| 2113 | } |
| 2114 | |
| 2115 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) |
| 2116 | atomic_inc(&ma->mca_refcnt); |
| 2117 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; |
| 2118 | spin_unlock_bh(&ma->mca_lock); |
| 2119 | } |
| 2120 | |
| 2121 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, |
| 2122 | struct inet6_dev *idev) |
| 2123 | { |
| 2124 | int err; |
| 2125 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 2126 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
| 2127 | * so no other readers or writers of iml or its sflist |
| 2128 | */ |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 2129 | if (!iml->sflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | /* any-source empty exclude case */ |
| 2131 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); |
| 2132 | } |
| 2133 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, |
| 2134 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); |
| 2135 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); |
| 2136 | iml->sflist = NULL; |
| 2137 | return err; |
| 2138 | } |
| 2139 | |
| 2140 | static void igmp6_leave_group(struct ifmcaddr6 *ma) |
| 2141 | { |
| 2142 | if (MLD_V1_SEEN(ma->idev)) { |
| 2143 | if (ma->mca_flags & MAF_LAST_REPORTER) |
| 2144 | igmp6_send(&ma->mca_addr, ma->idev->dev, |
| 2145 | ICMPV6_MGM_REDUCTION); |
| 2146 | } else { |
| 2147 | mld_add_delrec(ma->idev, ma); |
| 2148 | mld_ifc_event(ma->idev); |
| 2149 | } |
| 2150 | } |
| 2151 | |
| 2152 | static void mld_gq_timer_expire(unsigned long data) |
| 2153 | { |
| 2154 | struct inet6_dev *idev = (struct inet6_dev *)data; |
| 2155 | |
| 2156 | idev->mc_gq_running = 0; |
| 2157 | mld_send_report(idev, NULL); |
| 2158 | __in6_dev_put(idev); |
| 2159 | } |
| 2160 | |
| 2161 | static void mld_ifc_timer_expire(unsigned long data) |
| 2162 | { |
| 2163 | struct inet6_dev *idev = (struct inet6_dev *)data; |
| 2164 | |
| 2165 | mld_send_cr(idev); |
| 2166 | if (idev->mc_ifc_count) { |
| 2167 | idev->mc_ifc_count--; |
| 2168 | if (idev->mc_ifc_count) |
| 2169 | mld_ifc_start_timer(idev, idev->mc_maxdelay); |
| 2170 | } |
| 2171 | __in6_dev_put(idev); |
| 2172 | } |
| 2173 | |
| 2174 | static void mld_ifc_event(struct inet6_dev *idev) |
| 2175 | { |
| 2176 | if (MLD_V1_SEEN(idev)) |
| 2177 | return; |
| 2178 | idev->mc_ifc_count = idev->mc_qrv; |
| 2179 | mld_ifc_start_timer(idev, 1); |
| 2180 | } |
| 2181 | |
| 2182 | |
| 2183 | static void igmp6_timer_handler(unsigned long data) |
| 2184 | { |
| 2185 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; |
| 2186 | |
| 2187 | if (MLD_V1_SEEN(ma->idev)) |
| 2188 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
| 2189 | else |
| 2190 | mld_send_report(ma->idev, ma); |
| 2191 | |
| 2192 | spin_lock(&ma->mca_lock); |
| 2193 | ma->mca_flags |= MAF_LAST_REPORTER; |
| 2194 | ma->mca_flags &= ~MAF_TIMER_RUNNING; |
| 2195 | spin_unlock(&ma->mca_lock); |
| 2196 | ma_put(ma); |
| 2197 | } |
| 2198 | |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2199 | /* Device changing type */ |
| 2200 | |
| 2201 | void ipv6_mc_unmap(struct inet6_dev *idev) |
| 2202 | { |
| 2203 | struct ifmcaddr6 *i; |
| 2204 | |
| 2205 | /* Install multicast list, except for all-nodes (already installed) */ |
| 2206 | |
| 2207 | read_lock_bh(&idev->lock); |
| 2208 | for (i = idev->mc_list; i; i = i->next) |
| 2209 | igmp6_group_dropped(i); |
| 2210 | read_unlock_bh(&idev->lock); |
| 2211 | } |
| 2212 | |
| 2213 | void ipv6_mc_remap(struct inet6_dev *idev) |
| 2214 | { |
| 2215 | ipv6_mc_up(idev); |
| 2216 | } |
| 2217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | /* Device going down */ |
| 2219 | |
| 2220 | void ipv6_mc_down(struct inet6_dev *idev) |
| 2221 | { |
| 2222 | struct ifmcaddr6 *i; |
| 2223 | |
| 2224 | /* Withdraw multicast list */ |
| 2225 | |
| 2226 | read_lock_bh(&idev->lock); |
| 2227 | idev->mc_ifc_count = 0; |
| 2228 | if (del_timer(&idev->mc_ifc_timer)) |
| 2229 | __in6_dev_put(idev); |
| 2230 | idev->mc_gq_running = 0; |
| 2231 | if (del_timer(&idev->mc_gq_timer)) |
| 2232 | __in6_dev_put(idev); |
| 2233 | |
| 2234 | for (i = idev->mc_list; i; i=i->next) |
| 2235 | igmp6_group_dropped(i); |
| 2236 | read_unlock_bh(&idev->lock); |
| 2237 | |
| 2238 | mld_clear_delrec(idev); |
| 2239 | } |
| 2240 | |
| 2241 | |
| 2242 | /* Device going up */ |
| 2243 | |
| 2244 | void ipv6_mc_up(struct inet6_dev *idev) |
| 2245 | { |
| 2246 | struct ifmcaddr6 *i; |
| 2247 | |
| 2248 | /* Install multicast list, except for all-nodes (already installed) */ |
| 2249 | |
| 2250 | read_lock_bh(&idev->lock); |
| 2251 | for (i = idev->mc_list; i; i=i->next) |
| 2252 | igmp6_group_added(i); |
| 2253 | read_unlock_bh(&idev->lock); |
| 2254 | } |
| 2255 | |
| 2256 | /* IPv6 device initialization. */ |
| 2257 | |
| 2258 | void ipv6_mc_init_dev(struct inet6_dev *idev) |
| 2259 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | write_lock_bh(&idev->lock); |
Stephen Hemminger | 6457d26 | 2010-02-17 18:48:44 -0800 | [diff] [blame] | 2261 | spin_lock_init(&idev->mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | idev->mc_gq_running = 0; |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 2263 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
| 2264 | (unsigned long)idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | idev->mc_tomb = NULL; |
| 2266 | idev->mc_ifc_count = 0; |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 2267 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
| 2268 | (unsigned long)idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | idev->mc_qrv = MLD_QRV_DEFAULT; |
| 2270 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; |
| 2271 | idev->mc_v1_seen = 0; |
| 2272 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | } |
| 2274 | |
| 2275 | /* |
| 2276 | * Device is about to be destroyed: clean up. |
| 2277 | */ |
| 2278 | |
| 2279 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) |
| 2280 | { |
| 2281 | struct ifmcaddr6 *i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | |
| 2283 | /* Deactivate timers */ |
| 2284 | ipv6_mc_down(idev); |
| 2285 | |
| 2286 | /* Delete all-nodes address. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
| 2288 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will |
| 2289 | * fail. |
| 2290 | */ |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2291 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | |
YOSHIFUJI Hideaki | f3ee401 | 2008-04-10 15:42:11 +0900 | [diff] [blame] | 2293 | if (idev->cnf.forwarding) |
| 2294 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | |
| 2296 | write_lock_bh(&idev->lock); |
| 2297 | while ((i = idev->mc_list) != NULL) { |
| 2298 | idev->mc_list = i->next; |
| 2299 | write_unlock_bh(&idev->lock); |
| 2300 | |
| 2301 | igmp6_group_dropped(i); |
| 2302 | ma_put(i); |
| 2303 | |
| 2304 | write_lock_bh(&idev->lock); |
| 2305 | } |
| 2306 | write_unlock_bh(&idev->lock); |
| 2307 | } |
| 2308 | |
| 2309 | #ifdef CONFIG_PROC_FS |
| 2310 | struct igmp6_mc_iter_state { |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2311 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | struct net_device *dev; |
| 2313 | struct inet6_dev *idev; |
| 2314 | }; |
| 2315 | |
| 2316 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) |
| 2317 | |
| 2318 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) |
| 2319 | { |
| 2320 | struct ifmcaddr6 *im = NULL; |
| 2321 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2322 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2324 | state->idev = NULL; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2325 | for_each_netdev_rcu(net, state->dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | struct inet6_dev *idev; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2327 | idev = __in6_dev_get(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | if (!idev) |
| 2329 | continue; |
| 2330 | read_lock_bh(&idev->lock); |
| 2331 | im = idev->mc_list; |
| 2332 | if (im) { |
| 2333 | state->idev = idev; |
| 2334 | break; |
| 2335 | } |
| 2336 | read_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | } |
| 2338 | return im; |
| 2339 | } |
| 2340 | |
| 2341 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) |
| 2342 | { |
| 2343 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2344 | |
| 2345 | im = im->next; |
| 2346 | while (!im) { |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2347 | if (likely(state->idev != NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | read_unlock_bh(&state->idev->lock); |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2349 | |
| 2350 | state->dev = next_net_device_rcu(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | if (!state->dev) { |
| 2352 | state->idev = NULL; |
| 2353 | break; |
| 2354 | } |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2355 | state->idev = __in6_dev_get(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | if (!state->idev) |
| 2357 | continue; |
| 2358 | read_lock_bh(&state->idev->lock); |
| 2359 | im = state->idev->mc_list; |
| 2360 | } |
| 2361 | return im; |
| 2362 | } |
| 2363 | |
| 2364 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) |
| 2365 | { |
| 2366 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); |
| 2367 | if (im) |
| 2368 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) |
| 2369 | --pos; |
| 2370 | return pos ? NULL : im; |
| 2371 | } |
| 2372 | |
| 2373 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2374 | __acquires(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | { |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2376 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | return igmp6_mc_get_idx(seq, *pos); |
| 2378 | } |
| 2379 | |
| 2380 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2381 | { |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2382 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
| 2383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2384 | ++*pos; |
| 2385 | return im; |
| 2386 | } |
| 2387 | |
| 2388 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2389 | __releases(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | { |
| 2391 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | if (likely(state->idev != NULL)) { |
| 2394 | read_unlock_bh(&state->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | state->idev = NULL; |
| 2396 | } |
| 2397 | state->dev = NULL; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2398 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | } |
| 2400 | |
| 2401 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) |
| 2402 | { |
| 2403 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; |
| 2404 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2405 | |
| 2406 | seq_printf(seq, |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2407 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | state->dev->ifindex, state->dev->name, |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 2409 | &im->mca_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | im->mca_users, im->mca_flags, |
| 2411 | (im->mca_flags&MAF_TIMER_RUNNING) ? |
| 2412 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); |
| 2413 | return 0; |
| 2414 | } |
| 2415 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2416 | static const struct seq_operations igmp6_mc_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | .start = igmp6_mc_seq_start, |
| 2418 | .next = igmp6_mc_seq_next, |
| 2419 | .stop = igmp6_mc_seq_stop, |
| 2420 | .show = igmp6_mc_seq_show, |
| 2421 | }; |
| 2422 | |
| 2423 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) |
| 2424 | { |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2425 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
| 2426 | sizeof(struct igmp6_mc_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | } |
| 2428 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2429 | static const struct file_operations igmp6_mc_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | .owner = THIS_MODULE, |
| 2431 | .open = igmp6_mc_seq_open, |
| 2432 | .read = seq_read, |
| 2433 | .llseek = seq_lseek, |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2434 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | }; |
| 2436 | |
| 2437 | struct igmp6_mcf_iter_state { |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2438 | struct seq_net_private p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | struct net_device *dev; |
| 2440 | struct inet6_dev *idev; |
| 2441 | struct ifmcaddr6 *im; |
| 2442 | }; |
| 2443 | |
| 2444 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) |
| 2445 | |
| 2446 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) |
| 2447 | { |
| 2448 | struct ip6_sf_list *psf = NULL; |
| 2449 | struct ifmcaddr6 *im = NULL; |
| 2450 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 2451 | struct net *net = seq_file_net(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2453 | state->idev = NULL; |
| 2454 | state->im = NULL; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2455 | for_each_netdev_rcu(net, state->dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | struct inet6_dev *idev; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2457 | idev = __in6_dev_get(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | if (unlikely(idev == NULL)) |
| 2459 | continue; |
| 2460 | read_lock_bh(&idev->lock); |
| 2461 | im = idev->mc_list; |
| 2462 | if (likely(im != NULL)) { |
| 2463 | spin_lock_bh(&im->mca_lock); |
| 2464 | psf = im->mca_sources; |
| 2465 | if (likely(psf != NULL)) { |
| 2466 | state->im = im; |
| 2467 | state->idev = idev; |
| 2468 | break; |
| 2469 | } |
| 2470 | spin_unlock_bh(&im->mca_lock); |
| 2471 | } |
| 2472 | read_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | } |
| 2474 | return psf; |
| 2475 | } |
| 2476 | |
| 2477 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) |
| 2478 | { |
| 2479 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2480 | |
| 2481 | psf = psf->sf_next; |
| 2482 | while (!psf) { |
| 2483 | spin_unlock_bh(&state->im->mca_lock); |
| 2484 | state->im = state->im->next; |
| 2485 | while (!state->im) { |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2486 | if (likely(state->idev != NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | read_unlock_bh(&state->idev->lock); |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2488 | |
| 2489 | state->dev = next_net_device_rcu(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | if (!state->dev) { |
| 2491 | state->idev = NULL; |
| 2492 | goto out; |
| 2493 | } |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2494 | state->idev = __in6_dev_get(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | if (!state->idev) |
| 2496 | continue; |
| 2497 | read_lock_bh(&state->idev->lock); |
| 2498 | state->im = state->idev->mc_list; |
| 2499 | } |
| 2500 | if (!state->im) |
| 2501 | break; |
| 2502 | spin_lock_bh(&state->im->mca_lock); |
| 2503 | psf = state->im->mca_sources; |
| 2504 | } |
| 2505 | out: |
| 2506 | return psf; |
| 2507 | } |
| 2508 | |
| 2509 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) |
| 2510 | { |
| 2511 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); |
| 2512 | if (psf) |
| 2513 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) |
| 2514 | --pos; |
| 2515 | return pos ? NULL : psf; |
| 2516 | } |
| 2517 | |
| 2518 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2519 | __acquires(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | { |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2521 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 2523 | } |
| 2524 | |
| 2525 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2526 | { |
| 2527 | struct ip6_sf_list *psf; |
| 2528 | if (v == SEQ_START_TOKEN) |
| 2529 | psf = igmp6_mcf_get_first(seq); |
| 2530 | else |
| 2531 | psf = igmp6_mcf_get_next(seq, v); |
| 2532 | ++*pos; |
| 2533 | return psf; |
| 2534 | } |
| 2535 | |
| 2536 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2537 | __releases(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | { |
| 2539 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2540 | if (likely(state->im != NULL)) { |
| 2541 | spin_unlock_bh(&state->im->mca_lock); |
| 2542 | state->im = NULL; |
| 2543 | } |
| 2544 | if (likely(state->idev != NULL)) { |
| 2545 | read_unlock_bh(&state->idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | state->idev = NULL; |
| 2547 | } |
| 2548 | state->dev = NULL; |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 2549 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | } |
| 2551 | |
| 2552 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) |
| 2553 | { |
| 2554 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; |
| 2555 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2556 | |
| 2557 | if (v == SEQ_START_TOKEN) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2558 | seq_printf(seq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | "%3s %6s " |
YOSHIFUJI Hideaki | 9343e79 | 2006-01-17 02:10:53 -0800 | [diff] [blame] | 2560 | "%32s %32s %6s %6s\n", "Idx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | "Device", "Multicast Address", |
| 2562 | "Source Address", "INC", "EXC"); |
| 2563 | } else { |
| 2564 | seq_printf(seq, |
Harvey Harrison | 4b7a427 | 2008-10-29 12:50:24 -0700 | [diff] [blame] | 2565 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | state->dev->ifindex, state->dev->name, |
Harvey Harrison | b071195 | 2008-10-28 16:05:40 -0700 | [diff] [blame] | 2567 | &state->im->mca_addr, |
| 2568 | &psf->sf_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | psf->sf_count[MCAST_INCLUDE], |
| 2570 | psf->sf_count[MCAST_EXCLUDE]); |
| 2571 | } |
| 2572 | return 0; |
| 2573 | } |
| 2574 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2575 | static const struct seq_operations igmp6_mcf_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | .start = igmp6_mcf_seq_start, |
| 2577 | .next = igmp6_mcf_seq_next, |
| 2578 | .stop = igmp6_mcf_seq_stop, |
| 2579 | .show = igmp6_mcf_seq_show, |
| 2580 | }; |
| 2581 | |
| 2582 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) |
| 2583 | { |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2584 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
| 2585 | sizeof(struct igmp6_mcf_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | } |
| 2587 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2588 | static const struct file_operations igmp6_mcf_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | .owner = THIS_MODULE, |
| 2590 | .open = igmp6_mcf_seq_open, |
| 2591 | .read = seq_read, |
| 2592 | .llseek = seq_lseek, |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2593 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | }; |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2595 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2596 | static int __net_init igmp6_proc_init(struct net *net) |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2597 | { |
| 2598 | int err; |
| 2599 | |
| 2600 | err = -ENOMEM; |
| 2601 | if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops)) |
| 2602 | goto out; |
| 2603 | if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO, |
| 2604 | &igmp6_mcf_seq_fops)) |
| 2605 | goto out_proc_net_igmp6; |
| 2606 | |
| 2607 | err = 0; |
| 2608 | out: |
| 2609 | return err; |
| 2610 | |
| 2611 | out_proc_net_igmp6: |
| 2612 | proc_net_remove(net, "igmp6"); |
| 2613 | goto out; |
| 2614 | } |
| 2615 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2616 | static void __net_exit igmp6_proc_exit(struct net *net) |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2617 | { |
| 2618 | proc_net_remove(net, "mcfilter6"); |
| 2619 | proc_net_remove(net, "igmp6"); |
| 2620 | } |
| 2621 | #else |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2622 | static inline int igmp6_proc_init(struct net *net) |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2623 | { |
| 2624 | return 0; |
| 2625 | } |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2626 | static inline void igmp6_proc_exit(struct net *net) |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2627 | { |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | #endif |
| 2630 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2631 | static int __net_init igmp6_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | int err; |
| 2634 | |
Denis V. Lunev | 1ed8516 | 2008-04-03 14:31:03 -0700 | [diff] [blame] | 2635 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
| 2636 | SOCK_RAW, IPPROTO_ICMPV6, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2637 | if (err < 0) { |
| 2638 | printk(KERN_ERR |
| 2639 | "Failed to initialize the IGMP6 control socket (err %d).\n", |
| 2640 | err); |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2641 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | } |
| 2643 | |
Denis V. Lunev | 1ed8516 | 2008-04-03 14:31:03 -0700 | [diff] [blame] | 2644 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2645 | |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2646 | err = igmp6_proc_init(net); |
| 2647 | if (err) |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2648 | goto out_sock_create; |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2649 | out: |
| 2650 | return err; |
| 2651 | |
| 2652 | out_sock_create: |
Denis V. Lunev | 1ed8516 | 2008-04-03 14:31:03 -0700 | [diff] [blame] | 2653 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2654 | goto out; |
| 2655 | } |
| 2656 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 2657 | static void __net_exit igmp6_net_exit(struct net *net) |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2658 | { |
Denis V. Lunev | 1ed8516 | 2008-04-03 14:31:03 -0700 | [diff] [blame] | 2659 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
Daniel Lezcano | ea82edf | 2008-03-21 04:10:53 -0700 | [diff] [blame] | 2660 | igmp6_proc_exit(net); |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2661 | } |
| 2662 | |
| 2663 | static struct pernet_operations igmp6_net_ops = { |
| 2664 | .init = igmp6_net_init, |
| 2665 | .exit = igmp6_net_exit, |
| 2666 | }; |
| 2667 | |
| 2668 | int __init igmp6_init(void) |
| 2669 | { |
| 2670 | return register_pernet_subsys(&igmp6_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | } |
| 2672 | |
| 2673 | void igmp6_cleanup(void) |
| 2674 | { |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 2675 | unregister_pernet_subsys(&igmp6_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | } |