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 | * |
| 8 | * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $ |
| 9 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 10 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version |
| 15 | * 2 of the License, or (at your option) any later version. |
| 16 | */ |
| 17 | |
| 18 | /* Changes: |
| 19 | * |
| 20 | * yoshfuji : fix format of router-alert option |
| 21 | * YOSHIFUJI Hideaki @USAGI: |
| 22 | * Fixed source address for MLD message based on |
| 23 | * <draft-ietf-magma-mld-source-05.txt>. |
| 24 | * YOSHIFUJI Hideaki @USAGI: |
| 25 | * - Ignore Queries for invalid addresses. |
| 26 | * - MLD for link-local addresses. |
| 27 | * David L Stevens <dlstevens@us.ibm.com>: |
| 28 | * - MLDv2 support |
| 29 | */ |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
| 32 | #include <linux/errno.h> |
| 33 | #include <linux/types.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/socket.h> |
| 36 | #include <linux/sockios.h> |
| 37 | #include <linux/jiffies.h> |
| 38 | #include <linux/times.h> |
| 39 | #include <linux/net.h> |
| 40 | #include <linux/in.h> |
| 41 | #include <linux/in6.h> |
| 42 | #include <linux/netdevice.h> |
| 43 | #include <linux/if_arp.h> |
| 44 | #include <linux/route.h> |
| 45 | #include <linux/init.h> |
| 46 | #include <linux/proc_fs.h> |
| 47 | #include <linux/seq_file.h> |
| 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> |
| 62 | |
| 63 | #include <net/ip6_checksum.h> |
| 64 | |
| 65 | /* Set to 3 to get tracing... */ |
| 66 | #define MCAST_DEBUG 2 |
| 67 | |
| 68 | #if MCAST_DEBUG >= 3 |
| 69 | #define MDBG(x) printk x |
| 70 | #else |
| 71 | #define MDBG(x) |
| 72 | #endif |
| 73 | |
| 74 | /* |
| 75 | * These header formats should be in a separate include file, but icmpv6.h |
| 76 | * doesn't have in6_addr defined in all cases, there is no __u128, and no |
| 77 | * other files reference these. |
| 78 | * |
| 79 | * +-DLS 4/14/03 |
| 80 | */ |
| 81 | |
| 82 | /* Multicast Listener Discovery version 2 headers */ |
| 83 | |
| 84 | struct mld2_grec { |
| 85 | __u8 grec_type; |
| 86 | __u8 grec_auxwords; |
Al Viro | 8a74ff7 | 2006-11-08 00:22:08 -0800 | [diff] [blame] | 87 | __be16 grec_nsrcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | struct in6_addr grec_mca; |
| 89 | struct in6_addr grec_src[0]; |
| 90 | }; |
| 91 | |
| 92 | struct mld2_report { |
| 93 | __u8 type; |
| 94 | __u8 resv1; |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 95 | __sum16 csum; |
Al Viro | 8a74ff7 | 2006-11-08 00:22:08 -0800 | [diff] [blame] | 96 | __be16 resv2; |
| 97 | __be16 ngrec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | struct mld2_grec grec[0]; |
| 99 | }; |
| 100 | |
| 101 | struct mld2_query { |
| 102 | __u8 type; |
| 103 | __u8 code; |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 104 | __sum16 csum; |
Al Viro | 8a74ff7 | 2006-11-08 00:22:08 -0800 | [diff] [blame] | 105 | __be16 mrc; |
| 106 | __be16 resv1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | struct in6_addr mca; |
| 108 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 109 | __u8 qrv:3, |
| 110 | suppress:1, |
| 111 | resv2:4; |
| 112 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 113 | __u8 resv2:4, |
| 114 | suppress:1, |
| 115 | qrv:3; |
| 116 | #else |
| 117 | #error "Please fix <asm/byteorder.h>" |
| 118 | #endif |
| 119 | __u8 qqic; |
Al Viro | 8a74ff7 | 2006-11-08 00:22:08 -0800 | [diff] [blame] | 120 | __be16 nsrcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | struct in6_addr srcs[0]; |
| 122 | }; |
| 123 | |
| 124 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; |
| 125 | |
| 126 | /* Big mc list lock for all the sockets */ |
| 127 | static DEFINE_RWLOCK(ipv6_sk_mc_lock); |
| 128 | |
| 129 | static struct socket *igmp6_socket; |
| 130 | |
| 131 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); |
| 132 | |
| 133 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
| 134 | static void igmp6_leave_group(struct ifmcaddr6 *ma); |
| 135 | static void igmp6_timer_handler(unsigned long data); |
| 136 | |
| 137 | static void mld_gq_timer_expire(unsigned long data); |
| 138 | static void mld_ifc_timer_expire(unsigned long data); |
| 139 | static void mld_ifc_event(struct inet6_dev *idev); |
| 140 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); |
| 141 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); |
| 142 | static void mld_clear_delrec(struct inet6_dev *idev); |
| 143 | static int sf_setstate(struct ifmcaddr6 *pmc); |
| 144 | static void sf_markstate(struct ifmcaddr6 *pmc); |
| 145 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); |
| 146 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 147 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 148 | int delta); |
| 149 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 150 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 151 | int delta); |
| 152 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, |
| 153 | struct inet6_dev *idev); |
| 154 | |
| 155 | |
| 156 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) |
| 157 | #define MLD_QRV_DEFAULT 2 |
| 158 | |
| 159 | #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \ |
| 160 | (idev)->cnf.force_mld_version == 1 || \ |
| 161 | ((idev)->mc_v1_seen && \ |
| 162 | time_before(jiffies, (idev)->mc_v1_seen))) |
| 163 | |
| 164 | #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value)) |
| 165 | #define MLDV2_EXP(thresh, nbmant, nbexp, value) \ |
| 166 | ((value) < (thresh) ? (value) : \ |
Yan Zheng | f12baea | 2005-10-29 00:02:32 +0800 | [diff] [blame] | 167 | ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp)))) |
| 169 | |
| 170 | #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value) |
| 171 | #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value) |
| 172 | |
David L Stevens | 6f4353d | 2005-12-26 17:03:46 -0800 | [diff] [blame] | 173 | #define IPV6_MLD_MAX_MSF 64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 175 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | /* |
| 178 | * socket join on multicast group |
| 179 | */ |
| 180 | |
| 181 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr) |
| 182 | { |
| 183 | struct net_device *dev = NULL; |
| 184 | struct ipv6_mc_socklist *mc_lst; |
| 185 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 186 | int err; |
| 187 | |
| 188 | if (!ipv6_addr_is_multicast(addr)) |
| 189 | return -EINVAL; |
| 190 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 191 | read_lock_bh(&ipv6_sk_mc_lock); |
| 192 | for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) { |
| 193 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
| 194 | ipv6_addr_equal(&mc_lst->addr, addr)) { |
| 195 | read_unlock_bh(&ipv6_sk_mc_lock); |
| 196 | return -EADDRINUSE; |
| 197 | } |
| 198 | } |
| 199 | read_unlock_bh(&ipv6_sk_mc_lock); |
| 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
| 202 | |
| 203 | if (mc_lst == NULL) |
| 204 | return -ENOMEM; |
| 205 | |
| 206 | mc_lst->next = NULL; |
| 207 | ipv6_addr_copy(&mc_lst->addr, addr); |
| 208 | |
| 209 | if (ifindex == 0) { |
| 210 | struct rt6_info *rt; |
| 211 | rt = rt6_lookup(addr, NULL, 0, 0); |
| 212 | if (rt) { |
| 213 | dev = rt->rt6i_dev; |
| 214 | dev_hold(dev); |
| 215 | dst_release(&rt->u.dst); |
| 216 | } |
| 217 | } else |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 218 | dev = dev_get_by_index(&init_net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | if (dev == NULL) { |
| 221 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 222 | return -ENODEV; |
| 223 | } |
| 224 | |
| 225 | mc_lst->ifindex = dev->ifindex; |
| 226 | mc_lst->sfmode = MCAST_EXCLUDE; |
YOSHIFUJI Hideaki | 196433c | 2006-01-04 13:56:31 -0800 | [diff] [blame] | 227 | rwlock_init(&mc_lst->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | mc_lst->sflist = NULL; |
| 229 | |
| 230 | /* |
| 231 | * now add/increase the group membership on the device |
| 232 | */ |
| 233 | |
| 234 | err = ipv6_dev_mc_inc(dev, addr); |
| 235 | |
| 236 | if (err) { |
| 237 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 238 | dev_put(dev); |
| 239 | return err; |
| 240 | } |
| 241 | |
| 242 | write_lock_bh(&ipv6_sk_mc_lock); |
| 243 | mc_lst->next = np->ipv6_mc_list; |
| 244 | np->ipv6_mc_list = mc_lst; |
| 245 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 246 | |
| 247 | dev_put(dev); |
| 248 | |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * socket leave on multicast group |
| 254 | */ |
| 255 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr) |
| 256 | { |
| 257 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 258 | struct ipv6_mc_socklist *mc_lst, **lnk; |
| 259 | |
| 260 | write_lock_bh(&ipv6_sk_mc_lock); |
| 261 | for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) { |
| 262 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
| 263 | ipv6_addr_equal(&mc_lst->addr, addr)) { |
| 264 | struct net_device *dev; |
| 265 | |
| 266 | *lnk = mc_lst->next; |
| 267 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 268 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 269 | if ((dev = dev_get_by_index(&init_net, mc_lst->ifindex)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | struct inet6_dev *idev = in6_dev_get(dev); |
| 271 | |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 272 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
| 275 | in6_dev_put(idev); |
| 276 | } |
| 277 | dev_put(dev); |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 278 | } else |
| 279 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 281 | return 0; |
| 282 | } |
| 283 | } |
| 284 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 285 | |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 286 | return -EADDRNOTAVAIL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex) |
| 290 | { |
| 291 | struct net_device *dev = NULL; |
| 292 | struct inet6_dev *idev = NULL; |
| 293 | |
| 294 | if (ifindex == 0) { |
| 295 | struct rt6_info *rt; |
| 296 | |
| 297 | rt = rt6_lookup(group, NULL, 0, 0); |
| 298 | if (rt) { |
| 299 | dev = rt->rt6i_dev; |
| 300 | dev_hold(dev); |
| 301 | dst_release(&rt->u.dst); |
| 302 | } |
| 303 | } else |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 304 | dev = dev_get_by_index(&init_net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | if (!dev) |
| 307 | return NULL; |
| 308 | idev = in6_dev_get(dev); |
| 309 | if (!idev) { |
| 310 | dev_put(dev); |
| 311 | return NULL; |
| 312 | } |
| 313 | read_lock_bh(&idev->lock); |
| 314 | if (idev->dead) { |
| 315 | read_unlock_bh(&idev->lock); |
| 316 | in6_dev_put(idev); |
| 317 | dev_put(dev); |
| 318 | return NULL; |
| 319 | } |
| 320 | return idev; |
| 321 | } |
| 322 | |
| 323 | void ipv6_sock_mc_close(struct sock *sk) |
| 324 | { |
| 325 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 326 | struct ipv6_mc_socklist *mc_lst; |
| 327 | |
| 328 | write_lock_bh(&ipv6_sk_mc_lock); |
| 329 | while ((mc_lst = np->ipv6_mc_list) != NULL) { |
| 330 | struct net_device *dev; |
| 331 | |
| 332 | np->ipv6_mc_list = mc_lst->next; |
| 333 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 334 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 335 | dev = dev_get_by_index(&init_net, mc_lst->ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | if (dev) { |
| 337 | struct inet6_dev *idev = in6_dev_get(dev); |
| 338 | |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 339 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | if (idev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
| 342 | in6_dev_put(idev); |
| 343 | } |
| 344 | dev_put(dev); |
David L Stevens | acd6e00 | 2006-08-17 16:27:39 -0700 | [diff] [blame] | 345 | } else |
| 346 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
| 349 | |
| 350 | write_lock_bh(&ipv6_sk_mc_lock); |
| 351 | } |
| 352 | write_unlock_bh(&ipv6_sk_mc_lock); |
| 353 | } |
| 354 | |
| 355 | int ip6_mc_source(int add, int omode, struct sock *sk, |
| 356 | struct group_source_req *pgsr) |
| 357 | { |
| 358 | struct in6_addr *source, *group; |
| 359 | struct ipv6_mc_socklist *pmc; |
| 360 | struct net_device *dev; |
| 361 | struct inet6_dev *idev; |
| 362 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 363 | struct ip6_sf_socklist *psl; |
| 364 | int i, j, rv; |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 365 | int leavegroup = 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 366 | int pmclocked = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | int err; |
| 368 | |
| 369 | if (pgsr->gsr_group.ss_family != AF_INET6 || |
| 370 | pgsr->gsr_source.ss_family != AF_INET6) |
| 371 | return -EINVAL; |
| 372 | |
| 373 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
| 374 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; |
| 375 | |
| 376 | if (!ipv6_addr_is_multicast(group)) |
| 377 | return -EINVAL; |
| 378 | |
| 379 | idev = ip6_mc_find_dev(group, pgsr->gsr_interface); |
| 380 | if (!idev) |
| 381 | return -ENODEV; |
| 382 | dev = idev->dev; |
| 383 | |
| 384 | err = -EADDRNOTAVAIL; |
| 385 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 386 | read_lock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 388 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
| 389 | continue; |
| 390 | if (ipv6_addr_equal(&pmc->addr, group)) |
| 391 | break; |
| 392 | } |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 393 | if (!pmc) { /* must have a prior join */ |
| 394 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 396 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | /* if a source filter was set, must be the same mode as before */ |
| 398 | if (pmc->sflist) { |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 399 | if (pmc->sfmode != omode) { |
| 400 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } else if (pmc->sfmode != omode) { |
| 404 | /* allow mode switches for empty-set filters */ |
| 405 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); |
| 406 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); |
| 407 | pmc->sfmode = omode; |
| 408 | } |
| 409 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 410 | write_lock_bh(&pmc->sflock); |
| 411 | pmclocked = 1; |
| 412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | psl = pmc->sflist; |
| 414 | if (!add) { |
| 415 | if (!psl) |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 416 | goto done; /* err = -EADDRNOTAVAIL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | rv = !0; |
| 418 | for (i=0; i<psl->sl_count; i++) { |
| 419 | rv = memcmp(&psl->sl_addr[i], source, |
| 420 | sizeof(struct in6_addr)); |
| 421 | if (rv == 0) |
| 422 | break; |
| 423 | } |
| 424 | if (rv) /* source not found */ |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 425 | goto done; /* err = -EADDRNOTAVAIL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 427 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
| 428 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { |
| 429 | leavegroup = 1; |
| 430 | goto done; |
| 431 | } |
| 432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | /* update the interface filter */ |
| 434 | ip6_mc_del_src(idev, group, omode, 1, source, 1); |
| 435 | |
| 436 | for (j=i+1; j<psl->sl_count; j++) |
| 437 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
| 438 | psl->sl_count--; |
| 439 | err = 0; |
| 440 | goto done; |
| 441 | } |
| 442 | /* else, add a new source to the filter */ |
| 443 | |
| 444 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { |
| 445 | err = -ENOBUFS; |
| 446 | goto done; |
| 447 | } |
| 448 | if (!psl || psl->sl_count == psl->sl_max) { |
| 449 | struct ip6_sf_socklist *newpsl; |
| 450 | int count = IP6_SFBLOCK; |
| 451 | |
| 452 | if (psl) |
| 453 | count += psl->sl_max; |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 454 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | if (!newpsl) { |
| 456 | err = -ENOBUFS; |
| 457 | goto done; |
| 458 | } |
| 459 | newpsl->sl_max = count; |
| 460 | newpsl->sl_count = count - IP6_SFBLOCK; |
| 461 | if (psl) { |
| 462 | for (i=0; i<psl->sl_count; i++) |
| 463 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
| 464 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); |
| 465 | } |
| 466 | pmc->sflist = psl = newpsl; |
| 467 | } |
| 468 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ |
| 469 | for (i=0; i<psl->sl_count; i++) { |
| 470 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); |
| 471 | if (rv == 0) |
| 472 | break; |
| 473 | } |
| 474 | if (rv == 0) /* address already there is an error */ |
| 475 | goto done; |
| 476 | for (j=psl->sl_count-1; j>=i; j--) |
| 477 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
| 478 | psl->sl_addr[i] = *source; |
| 479 | psl->sl_count++; |
| 480 | err = 0; |
| 481 | /* update the interface list */ |
| 482 | ip6_mc_add_src(idev, group, omode, 1, source, 1); |
| 483 | done: |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 484 | if (pmclocked) |
| 485 | write_unlock_bh(&pmc->sflock); |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 486 | read_unlock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | read_unlock_bh(&idev->lock); |
| 488 | in6_dev_put(idev); |
| 489 | dev_put(dev); |
David L Stevens | c9e3e8b | 2005-06-21 13:58:25 -0700 | [diff] [blame] | 490 | if (leavegroup) |
| 491 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | return err; |
| 493 | } |
| 494 | |
| 495 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) |
| 496 | { |
| 497 | struct in6_addr *group; |
| 498 | struct ipv6_mc_socklist *pmc; |
| 499 | struct net_device *dev; |
| 500 | struct inet6_dev *idev; |
| 501 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 502 | struct ip6_sf_socklist *newpsl, *psl; |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 503 | int leavegroup = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | int i, err; |
| 505 | |
| 506 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; |
| 507 | |
| 508 | if (!ipv6_addr_is_multicast(group)) |
| 509 | return -EINVAL; |
| 510 | if (gsf->gf_fmode != MCAST_INCLUDE && |
| 511 | gsf->gf_fmode != MCAST_EXCLUDE) |
| 512 | return -EINVAL; |
| 513 | |
| 514 | idev = ip6_mc_find_dev(group, gsf->gf_interface); |
| 515 | |
| 516 | if (!idev) |
| 517 | return -ENODEV; |
| 518 | dev = idev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
David S. Miller | 9c05989 | 2005-07-08 21:44:39 -0700 | [diff] [blame] | 520 | err = 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 521 | read_lock_bh(&ipv6_sk_mc_lock); |
| 522 | |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 523 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
| 524 | leavegroup = 1; |
| 525 | goto done; |
| 526 | } |
| 527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 529 | if (pmc->ifindex != gsf->gf_interface) |
| 530 | continue; |
| 531 | if (ipv6_addr_equal(&pmc->addr, group)) |
| 532 | break; |
| 533 | } |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 534 | if (!pmc) { /* must have a prior join */ |
| 535 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | goto done; |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 537 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | if (gsf->gf_numsrc) { |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 539 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
| 540 | GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if (!newpsl) { |
| 542 | err = -ENOBUFS; |
| 543 | goto done; |
| 544 | } |
| 545 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; |
| 546 | for (i=0; i<newpsl->sl_count; ++i) { |
| 547 | struct sockaddr_in6 *psin6; |
| 548 | |
| 549 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; |
| 550 | newpsl->sl_addr[i] = psin6->sin6_addr; |
| 551 | } |
| 552 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, |
| 553 | newpsl->sl_count, newpsl->sl_addr, 0); |
| 554 | if (err) { |
| 555 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); |
| 556 | goto done; |
| 557 | } |
Yan Zheng | 8713dbf | 2005-10-28 08:02:08 +0800 | [diff] [blame] | 558 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | newpsl = NULL; |
Yan Zheng | 8713dbf | 2005-10-28 08:02:08 +0800 | [diff] [blame] | 560 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
| 561 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 562 | |
| 563 | write_lock_bh(&pmc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | psl = pmc->sflist; |
| 565 | if (psl) { |
| 566 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, |
| 567 | psl->sl_count, psl->sl_addr, 0); |
| 568 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); |
| 569 | } else |
| 570 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); |
| 571 | pmc->sflist = newpsl; |
| 572 | pmc->sfmode = gsf->gf_fmode; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 573 | write_unlock_bh(&pmc->sflock); |
David L Stevens | 917f2f1 | 2005-07-08 17:45:16 -0700 | [diff] [blame] | 574 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | done: |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 576 | read_unlock_bh(&ipv6_sk_mc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | read_unlock_bh(&idev->lock); |
| 578 | in6_dev_put(idev); |
| 579 | dev_put(dev); |
David L Stevens | 9951f03 | 2005-07-08 17:47:28 -0700 | [diff] [blame] | 580 | if (leavegroup) |
| 581 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return err; |
| 583 | } |
| 584 | |
| 585 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
| 586 | struct group_filter __user *optval, int __user *optlen) |
| 587 | { |
| 588 | int err, i, count, copycount; |
| 589 | struct in6_addr *group; |
| 590 | struct ipv6_mc_socklist *pmc; |
| 591 | struct inet6_dev *idev; |
| 592 | struct net_device *dev; |
| 593 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
| 594 | struct ip6_sf_socklist *psl; |
| 595 | |
| 596 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; |
| 597 | |
| 598 | if (!ipv6_addr_is_multicast(group)) |
| 599 | return -EINVAL; |
| 600 | |
| 601 | idev = ip6_mc_find_dev(group, gsf->gf_interface); |
| 602 | |
| 603 | if (!idev) |
| 604 | return -ENODEV; |
| 605 | |
| 606 | dev = idev->dev; |
| 607 | |
| 608 | err = -EADDRNOTAVAIL; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 609 | /* |
| 610 | * changes to the ipv6_mc_list require the socket lock and |
| 611 | * a read lock on ip6_sk_mc_lock. We have the socket lock, |
| 612 | * so reading the list is safe. |
| 613 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
| 615 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
| 616 | if (pmc->ifindex != gsf->gf_interface) |
| 617 | continue; |
| 618 | if (ipv6_addr_equal(group, &pmc->addr)) |
| 619 | break; |
| 620 | } |
| 621 | if (!pmc) /* must have a prior join */ |
| 622 | goto done; |
| 623 | gsf->gf_fmode = pmc->sfmode; |
| 624 | psl = pmc->sflist; |
| 625 | count = psl ? psl->sl_count : 0; |
| 626 | read_unlock_bh(&idev->lock); |
| 627 | in6_dev_put(idev); |
| 628 | dev_put(dev); |
| 629 | |
| 630 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; |
| 631 | gsf->gf_numsrc = count; |
| 632 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || |
| 633 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { |
| 634 | return -EFAULT; |
| 635 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 636 | /* changes to psl require the socket lock, a read lock on |
| 637 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We |
| 638 | * have the socket lock, so reading here is safe. |
| 639 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | for (i=0; i<copycount; i++) { |
| 641 | struct sockaddr_in6 *psin6; |
| 642 | struct sockaddr_storage ss; |
| 643 | |
| 644 | psin6 = (struct sockaddr_in6 *)&ss; |
| 645 | memset(&ss, 0, sizeof(ss)); |
| 646 | psin6->sin6_family = AF_INET6; |
| 647 | psin6->sin6_addr = psl->sl_addr[i]; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 648 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | return -EFAULT; |
| 650 | } |
| 651 | return 0; |
| 652 | done: |
| 653 | read_unlock_bh(&idev->lock); |
| 654 | in6_dev_put(idev); |
| 655 | dev_put(dev); |
| 656 | return err; |
| 657 | } |
| 658 | |
| 659 | int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, |
| 660 | struct in6_addr *src_addr) |
| 661 | { |
| 662 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 663 | struct ipv6_mc_socklist *mc; |
| 664 | struct ip6_sf_socklist *psl; |
| 665 | int rv = 1; |
| 666 | |
| 667 | read_lock(&ipv6_sk_mc_lock); |
| 668 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { |
| 669 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
| 670 | break; |
| 671 | } |
| 672 | if (!mc) { |
| 673 | read_unlock(&ipv6_sk_mc_lock); |
| 674 | return 1; |
| 675 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 676 | read_lock(&mc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | psl = mc->sflist; |
| 678 | if (!psl) { |
| 679 | rv = mc->sfmode == MCAST_EXCLUDE; |
| 680 | } else { |
| 681 | int i; |
| 682 | |
| 683 | for (i=0; i<psl->sl_count; i++) { |
| 684 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
| 685 | break; |
| 686 | } |
| 687 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) |
| 688 | rv = 0; |
| 689 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
| 690 | rv = 0; |
| 691 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 692 | read_unlock(&mc->sflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | read_unlock(&ipv6_sk_mc_lock); |
| 694 | |
| 695 | return rv; |
| 696 | } |
| 697 | |
| 698 | static void ma_put(struct ifmcaddr6 *mc) |
| 699 | { |
| 700 | if (atomic_dec_and_test(&mc->mca_refcnt)) { |
| 701 | in6_dev_put(mc->idev); |
| 702 | kfree(mc); |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
| 707 | { |
| 708 | struct net_device *dev = mc->idev->dev; |
| 709 | char buf[MAX_ADDR_LEN]; |
| 710 | |
| 711 | spin_lock_bh(&mc->mca_lock); |
| 712 | if (!(mc->mca_flags&MAF_LOADED)) { |
| 713 | mc->mca_flags |= MAF_LOADED; |
| 714 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) |
| 715 | dev_mc_add(dev, buf, dev->addr_len, 0); |
| 716 | } |
| 717 | spin_unlock_bh(&mc->mca_lock); |
| 718 | |
| 719 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) |
| 720 | return; |
| 721 | |
| 722 | if (MLD_V1_SEEN(mc->idev)) { |
| 723 | igmp6_join_group(mc); |
| 724 | return; |
| 725 | } |
| 726 | /* else v2 */ |
| 727 | |
| 728 | mc->mca_crcount = mc->idev->mc_qrv; |
| 729 | mld_ifc_event(mc->idev); |
| 730 | } |
| 731 | |
| 732 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) |
| 733 | { |
| 734 | struct net_device *dev = mc->idev->dev; |
| 735 | char buf[MAX_ADDR_LEN]; |
| 736 | |
| 737 | spin_lock_bh(&mc->mca_lock); |
| 738 | if (mc->mca_flags&MAF_LOADED) { |
| 739 | mc->mca_flags &= ~MAF_LOADED; |
| 740 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) |
| 741 | dev_mc_delete(dev, buf, dev->addr_len, 0); |
| 742 | } |
| 743 | |
| 744 | if (mc->mca_flags & MAF_NOREPORT) |
| 745 | goto done; |
| 746 | spin_unlock_bh(&mc->mca_lock); |
| 747 | |
| 748 | if (!mc->idev->dead) |
| 749 | igmp6_leave_group(mc); |
| 750 | |
| 751 | spin_lock_bh(&mc->mca_lock); |
| 752 | if (del_timer(&mc->mca_timer)) |
| 753 | atomic_dec(&mc->mca_refcnt); |
| 754 | done: |
| 755 | ip6_mc_clear_src(mc); |
| 756 | spin_unlock_bh(&mc->mca_lock); |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * deleted ifmcaddr6 manipulation |
| 761 | */ |
| 762 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) |
| 763 | { |
| 764 | struct ifmcaddr6 *pmc; |
| 765 | |
| 766 | /* this is an "ifmcaddr6" for convenience; only the fields below |
| 767 | * are actually used. In particular, the refcnt and users are not |
| 768 | * used for management of the delete list. Using the same structure |
| 769 | * for deleted items allows change reports to use common code with |
| 770 | * non-deleted or query-response MCA's. |
| 771 | */ |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 772 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (!pmc) |
| 774 | return; |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | spin_lock_bh(&im->mca_lock); |
| 777 | spin_lock_init(&pmc->mca_lock); |
| 778 | pmc->idev = im->idev; |
| 779 | in6_dev_hold(idev); |
| 780 | pmc->mca_addr = im->mca_addr; |
| 781 | pmc->mca_crcount = idev->mc_qrv; |
| 782 | pmc->mca_sfmode = im->mca_sfmode; |
| 783 | if (pmc->mca_sfmode == MCAST_INCLUDE) { |
| 784 | struct ip6_sf_list *psf; |
| 785 | |
| 786 | pmc->mca_tomb = im->mca_tomb; |
| 787 | pmc->mca_sources = im->mca_sources; |
| 788 | im->mca_tomb = im->mca_sources = NULL; |
| 789 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) |
| 790 | psf->sf_crcount = pmc->mca_crcount; |
| 791 | } |
| 792 | spin_unlock_bh(&im->mca_lock); |
| 793 | |
| 794 | write_lock_bh(&idev->mc_lock); |
| 795 | pmc->next = idev->mc_tomb; |
| 796 | idev->mc_tomb = pmc; |
| 797 | write_unlock_bh(&idev->mc_lock); |
| 798 | } |
| 799 | |
| 800 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) |
| 801 | { |
| 802 | struct ifmcaddr6 *pmc, *pmc_prev; |
| 803 | struct ip6_sf_list *psf, *psf_next; |
| 804 | |
| 805 | write_lock_bh(&idev->mc_lock); |
| 806 | pmc_prev = NULL; |
| 807 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { |
| 808 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
| 809 | break; |
| 810 | pmc_prev = pmc; |
| 811 | } |
| 812 | if (pmc) { |
| 813 | if (pmc_prev) |
| 814 | pmc_prev->next = pmc->next; |
| 815 | else |
| 816 | idev->mc_tomb = pmc->next; |
| 817 | } |
| 818 | write_unlock_bh(&idev->mc_lock); |
| 819 | if (pmc) { |
| 820 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { |
| 821 | psf_next = psf->sf_next; |
| 822 | kfree(psf); |
| 823 | } |
| 824 | in6_dev_put(pmc->idev); |
| 825 | kfree(pmc); |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | static void mld_clear_delrec(struct inet6_dev *idev) |
| 830 | { |
| 831 | struct ifmcaddr6 *pmc, *nextpmc; |
| 832 | |
| 833 | write_lock_bh(&idev->mc_lock); |
| 834 | pmc = idev->mc_tomb; |
| 835 | idev->mc_tomb = NULL; |
| 836 | write_unlock_bh(&idev->mc_lock); |
| 837 | |
| 838 | for (; pmc; pmc = nextpmc) { |
| 839 | nextpmc = pmc->next; |
| 840 | ip6_mc_clear_src(pmc); |
| 841 | in6_dev_put(pmc->idev); |
| 842 | kfree(pmc); |
| 843 | } |
| 844 | |
| 845 | /* clear dead sources, too */ |
| 846 | read_lock_bh(&idev->lock); |
| 847 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 848 | struct ip6_sf_list *psf, *psf_next; |
| 849 | |
| 850 | spin_lock_bh(&pmc->mca_lock); |
| 851 | psf = pmc->mca_tomb; |
| 852 | pmc->mca_tomb = NULL; |
| 853 | spin_unlock_bh(&pmc->mca_lock); |
| 854 | for (; psf; psf=psf_next) { |
| 855 | psf_next = psf->sf_next; |
| 856 | kfree(psf); |
| 857 | } |
| 858 | } |
| 859 | read_unlock_bh(&idev->lock); |
| 860 | } |
| 861 | |
| 862 | |
| 863 | /* |
| 864 | * device multicast group inc (add if not found) |
| 865 | */ |
| 866 | int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) |
| 867 | { |
| 868 | struct ifmcaddr6 *mc; |
| 869 | struct inet6_dev *idev; |
| 870 | |
| 871 | idev = in6_dev_get(dev); |
| 872 | |
| 873 | if (idev == NULL) |
| 874 | return -EINVAL; |
| 875 | |
| 876 | write_lock_bh(&idev->lock); |
| 877 | if (idev->dead) { |
| 878 | write_unlock_bh(&idev->lock); |
| 879 | in6_dev_put(idev); |
| 880 | return -ENODEV; |
| 881 | } |
| 882 | |
| 883 | for (mc = idev->mc_list; mc; mc = mc->next) { |
| 884 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { |
| 885 | mc->mca_users++; |
| 886 | write_unlock_bh(&idev->lock); |
| 887 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, |
| 888 | NULL, 0); |
| 889 | in6_dev_put(idev); |
| 890 | return 0; |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | * not found: create a new one. |
| 896 | */ |
| 897 | |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 898 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
| 900 | if (mc == NULL) { |
| 901 | write_unlock_bh(&idev->lock); |
| 902 | in6_dev_put(idev); |
| 903 | return -ENOMEM; |
| 904 | } |
| 905 | |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 906 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
| 908 | ipv6_addr_copy(&mc->mca_addr, addr); |
| 909 | mc->idev = idev; |
| 910 | mc->mca_users = 1; |
| 911 | /* mca_stamp should be updated upon changes */ |
| 912 | mc->mca_cstamp = mc->mca_tstamp = jiffies; |
| 913 | atomic_set(&mc->mca_refcnt, 2); |
| 914 | spin_lock_init(&mc->mca_lock); |
| 915 | |
| 916 | /* initial mode is (EX, empty) */ |
| 917 | mc->mca_sfmode = MCAST_EXCLUDE; |
| 918 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; |
| 919 | |
| 920 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || |
| 921 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) |
| 922 | mc->mca_flags |= MAF_NOREPORT; |
| 923 | |
| 924 | mc->next = idev->mc_list; |
| 925 | idev->mc_list = mc; |
| 926 | write_unlock_bh(&idev->lock); |
| 927 | |
| 928 | mld_del_delrec(idev, &mc->mca_addr); |
| 929 | igmp6_group_added(mc); |
| 930 | ma_put(mc); |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * device multicast group del |
| 936 | */ |
| 937 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr) |
| 938 | { |
| 939 | struct ifmcaddr6 *ma, **map; |
| 940 | |
| 941 | write_lock_bh(&idev->lock); |
| 942 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { |
| 943 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
| 944 | if (--ma->mca_users == 0) { |
| 945 | *map = ma->next; |
| 946 | write_unlock_bh(&idev->lock); |
| 947 | |
| 948 | igmp6_group_dropped(ma); |
| 949 | |
| 950 | ma_put(ma); |
| 951 | return 0; |
| 952 | } |
| 953 | write_unlock_bh(&idev->lock); |
| 954 | return 0; |
| 955 | } |
| 956 | } |
| 957 | write_unlock_bh(&idev->lock); |
| 958 | |
| 959 | return -ENOENT; |
| 960 | } |
| 961 | |
| 962 | int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) |
| 963 | { |
| 964 | struct inet6_dev *idev = in6_dev_get(dev); |
| 965 | int err; |
| 966 | |
| 967 | if (!idev) |
| 968 | return -ENODEV; |
| 969 | |
| 970 | err = __ipv6_dev_mc_dec(idev, addr); |
| 971 | |
| 972 | in6_dev_put(idev); |
| 973 | |
| 974 | return err; |
| 975 | } |
| 976 | |
| 977 | /* |
| 978 | * identify MLD packets for MLD filter exceptions |
| 979 | */ |
| 980 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) |
| 981 | { |
| 982 | struct icmp6hdr *pic; |
| 983 | |
| 984 | if (nexthdr != IPPROTO_ICMPV6) |
| 985 | return 0; |
| 986 | |
| 987 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) |
| 988 | return 0; |
| 989 | |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 990 | pic = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
| 992 | switch (pic->icmp6_type) { |
| 993 | case ICMPV6_MGM_QUERY: |
| 994 | case ICMPV6_MGM_REPORT: |
| 995 | case ICMPV6_MGM_REDUCTION: |
| 996 | case ICMPV6_MLD2_REPORT: |
| 997 | return 1; |
| 998 | default: |
| 999 | break; |
| 1000 | } |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * check if the interface/address pair is valid |
| 1006 | */ |
| 1007 | int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, |
| 1008 | struct in6_addr *src_addr) |
| 1009 | { |
| 1010 | struct inet6_dev *idev; |
| 1011 | struct ifmcaddr6 *mc; |
| 1012 | int rv = 0; |
| 1013 | |
| 1014 | idev = in6_dev_get(dev); |
| 1015 | if (idev) { |
| 1016 | read_lock_bh(&idev->lock); |
| 1017 | for (mc = idev->mc_list; mc; mc=mc->next) { |
| 1018 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
| 1019 | break; |
| 1020 | } |
| 1021 | if (mc) { |
| 1022 | if (src_addr && !ipv6_addr_any(src_addr)) { |
| 1023 | struct ip6_sf_list *psf; |
| 1024 | |
| 1025 | spin_lock_bh(&mc->mca_lock); |
| 1026 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { |
| 1027 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
| 1028 | break; |
| 1029 | } |
| 1030 | if (psf) |
| 1031 | rv = psf->sf_count[MCAST_INCLUDE] || |
| 1032 | psf->sf_count[MCAST_EXCLUDE] != |
| 1033 | mc->mca_sfcount[MCAST_EXCLUDE]; |
| 1034 | else |
| 1035 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; |
| 1036 | spin_unlock_bh(&mc->mca_lock); |
| 1037 | } else |
| 1038 | rv = 1; /* don't filter unspecified source */ |
| 1039 | } |
| 1040 | read_unlock_bh(&idev->lock); |
| 1041 | in6_dev_put(idev); |
| 1042 | } |
| 1043 | return rv; |
| 1044 | } |
| 1045 | |
| 1046 | static void mld_gq_start_timer(struct inet6_dev *idev) |
| 1047 | { |
| 1048 | int tv = net_random() % idev->mc_maxdelay; |
| 1049 | |
| 1050 | idev->mc_gq_running = 1; |
| 1051 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) |
| 1052 | in6_dev_hold(idev); |
| 1053 | } |
| 1054 | |
| 1055 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) |
| 1056 | { |
| 1057 | int tv = net_random() % delay; |
| 1058 | |
| 1059 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) |
| 1060 | in6_dev_hold(idev); |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * IGMP handling (alias multicast ICMPv6 messages) |
| 1065 | */ |
| 1066 | |
| 1067 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) |
| 1068 | { |
| 1069 | unsigned long delay = resptime; |
| 1070 | |
| 1071 | /* Do not start timer for these addresses */ |
| 1072 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || |
| 1073 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) |
| 1074 | return; |
| 1075 | |
| 1076 | if (del_timer(&ma->mca_timer)) { |
| 1077 | atomic_dec(&ma->mca_refcnt); |
| 1078 | delay = ma->mca_timer.expires - jiffies; |
| 1079 | } |
| 1080 | |
| 1081 | if (delay >= resptime) { |
| 1082 | if (resptime) |
| 1083 | delay = net_random() % resptime; |
| 1084 | else |
| 1085 | delay = 1; |
| 1086 | } |
| 1087 | ma->mca_timer.expires = jiffies + delay; |
| 1088 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) |
| 1089 | atomic_inc(&ma->mca_refcnt); |
| 1090 | ma->mca_flags |= MAF_TIMER_RUNNING; |
| 1091 | } |
| 1092 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1093 | /* mark EXCLUDE-mode sources */ |
| 1094 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | struct in6_addr *srcs) |
| 1096 | { |
| 1097 | struct ip6_sf_list *psf; |
| 1098 | int i, scount; |
| 1099 | |
| 1100 | scount = 0; |
| 1101 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1102 | if (scount == nsrcs) |
| 1103 | break; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1104 | for (i=0; i<nsrcs; i++) { |
| 1105 | /* skip inactive filters */ |
| 1106 | if (pmc->mca_sfcount[MCAST_INCLUDE] || |
| 1107 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
| 1108 | psf->sf_count[MCAST_EXCLUDE]) |
| 1109 | continue; |
| 1110 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
| 1111 | scount++; |
| 1112 | break; |
| 1113 | } |
| 1114 | } |
| 1115 | } |
| 1116 | pmc->mca_flags &= ~MAF_GSQUERY; |
| 1117 | if (scount == nsrcs) /* all sources excluded */ |
| 1118 | return 0; |
| 1119 | return 1; |
| 1120 | } |
| 1121 | |
| 1122 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
| 1123 | struct in6_addr *srcs) |
| 1124 | { |
| 1125 | struct ip6_sf_list *psf; |
| 1126 | int i, scount; |
| 1127 | |
| 1128 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
| 1129 | return mld_xmarksources(pmc, nsrcs, srcs); |
| 1130 | |
| 1131 | /* mark INCLUDE-mode sources */ |
| 1132 | |
| 1133 | scount = 0; |
| 1134 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1135 | if (scount == nsrcs) |
| 1136 | break; |
| 1137 | for (i=0; i<nsrcs; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
| 1139 | psf->sf_gsresp = 1; |
| 1140 | scount++; |
| 1141 | break; |
| 1142 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1143 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1145 | if (!scount) { |
| 1146 | pmc->mca_flags &= ~MAF_GSQUERY; |
| 1147 | return 0; |
| 1148 | } |
| 1149 | pmc->mca_flags |= MAF_GSQUERY; |
| 1150 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | int igmp6_event_query(struct sk_buff *skb) |
| 1154 | { |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1155 | struct mld2_query *mlh2 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | struct ifmcaddr6 *ma; |
| 1157 | struct in6_addr *group; |
| 1158 | unsigned long max_delay; |
| 1159 | struct inet6_dev *idev; |
| 1160 | struct icmp6hdr *hdr; |
| 1161 | int group_type; |
| 1162 | int mark = 0; |
| 1163 | int len; |
| 1164 | |
| 1165 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
| 1166 | return -EINVAL; |
| 1167 | |
| 1168 | /* compute payload length excluding extension headers */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1169 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
Arnaldo Carvalho de Melo | cfe1fc7 | 2007-03-16 17:26:39 -0300 | [diff] [blame] | 1170 | len -= skb_network_header_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | |
| 1172 | /* Drop queries with not link local source */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1173 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | return -EINVAL; |
| 1175 | |
| 1176 | idev = in6_dev_get(skb->dev); |
| 1177 | |
| 1178 | if (idev == NULL) |
| 1179 | return 0; |
| 1180 | |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 1181 | hdr = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | group = (struct in6_addr *) (hdr + 1); |
| 1183 | group_type = ipv6_addr_type(group); |
| 1184 | |
| 1185 | if (group_type != IPV6_ADDR_ANY && |
| 1186 | !(group_type&IPV6_ADDR_MULTICAST)) { |
| 1187 | in6_dev_put(idev); |
| 1188 | return -EINVAL; |
| 1189 | } |
| 1190 | |
| 1191 | if (len == 24) { |
| 1192 | int switchback; |
| 1193 | /* MLDv1 router present */ |
| 1194 | |
| 1195 | /* Translate milliseconds to jiffies */ |
| 1196 | max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000; |
| 1197 | |
| 1198 | switchback = (idev->mc_qrv + 1) * max_delay; |
| 1199 | idev->mc_v1_seen = jiffies + switchback; |
| 1200 | |
| 1201 | /* cancel the interface change timer */ |
| 1202 | idev->mc_ifc_count = 0; |
| 1203 | if (del_timer(&idev->mc_ifc_timer)) |
| 1204 | __in6_dev_put(idev); |
| 1205 | /* clear deleted report items */ |
| 1206 | mld_clear_delrec(idev); |
| 1207 | } else if (len >= 28) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1208 | int srcs_offset = sizeof(struct mld2_query) - |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1209 | sizeof(struct icmp6hdr); |
| 1210 | if (!pskb_may_pull(skb, srcs_offset)) { |
| 1211 | in6_dev_put(idev); |
| 1212 | return -EINVAL; |
| 1213 | } |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1214 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000; |
| 1216 | if (!max_delay) |
| 1217 | max_delay = 1; |
| 1218 | idev->mc_maxdelay = max_delay; |
| 1219 | if (mlh2->qrv) |
| 1220 | idev->mc_qrv = mlh2->qrv; |
| 1221 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
| 1222 | if (mlh2->nsrcs) { |
| 1223 | in6_dev_put(idev); |
| 1224 | return -EINVAL; /* no sources allowed */ |
| 1225 | } |
| 1226 | mld_gq_start_timer(idev); |
| 1227 | in6_dev_put(idev); |
| 1228 | return 0; |
| 1229 | } |
| 1230 | /* mark sources to include, if group & source-specific */ |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1231 | if (mlh2->nsrcs != 0) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1232 | if (!pskb_may_pull(skb, srcs_offset + |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1233 | ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) { |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1234 | in6_dev_put(idev); |
| 1235 | return -EINVAL; |
| 1236 | } |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1237 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
Yan Zheng | 97300b5 | 2005-10-31 20:09:45 +0800 | [diff] [blame] | 1238 | mark = 1; |
| 1239 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | } else { |
| 1241 | in6_dev_put(idev); |
| 1242 | return -EINVAL; |
| 1243 | } |
| 1244 | |
| 1245 | read_lock_bh(&idev->lock); |
| 1246 | if (group_type == IPV6_ADDR_ANY) { |
| 1247 | for (ma = idev->mc_list; ma; ma=ma->next) { |
| 1248 | spin_lock_bh(&ma->mca_lock); |
| 1249 | igmp6_group_queried(ma, max_delay); |
| 1250 | spin_unlock_bh(&ma->mca_lock); |
| 1251 | } |
| 1252 | } else { |
| 1253 | for (ma = idev->mc_list; ma; ma=ma->next) { |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1254 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | continue; |
| 1256 | spin_lock_bh(&ma->mca_lock); |
| 1257 | if (ma->mca_flags & MAF_TIMER_RUNNING) { |
| 1258 | /* gsquery <- gsquery && mark */ |
| 1259 | if (!mark) |
| 1260 | ma->mca_flags &= ~MAF_GSQUERY; |
| 1261 | } else { |
| 1262 | /* gsquery <- mark */ |
| 1263 | if (mark) |
| 1264 | ma->mca_flags |= MAF_GSQUERY; |
| 1265 | else |
| 1266 | ma->mca_flags &= ~MAF_GSQUERY; |
| 1267 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1268 | if (!(ma->mca_flags & MAF_GSQUERY) || |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1269 | mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs)) |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1270 | igmp6_group_queried(ma, max_delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | spin_unlock_bh(&ma->mca_lock); |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1272 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | } |
| 1274 | } |
| 1275 | read_unlock_bh(&idev->lock); |
| 1276 | in6_dev_put(idev); |
| 1277 | |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
| 1281 | |
| 1282 | int igmp6_event_report(struct sk_buff *skb) |
| 1283 | { |
| 1284 | struct ifmcaddr6 *ma; |
| 1285 | struct in6_addr *addrp; |
| 1286 | struct inet6_dev *idev; |
| 1287 | struct icmp6hdr *hdr; |
| 1288 | int addr_type; |
| 1289 | |
| 1290 | /* Our own report looped back. Ignore it. */ |
| 1291 | if (skb->pkt_type == PACKET_LOOPBACK) |
| 1292 | return 0; |
| 1293 | |
David Stevens | 24c6927 | 2005-12-02 20:32:59 -0800 | [diff] [blame] | 1294 | /* send our report if the MC router may not have heard this report */ |
| 1295 | if (skb->pkt_type != PACKET_MULTICAST && |
| 1296 | skb->pkt_type != PACKET_BROADCAST) |
| 1297 | return 0; |
| 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
| 1300 | return -EINVAL; |
| 1301 | |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 1302 | hdr = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
| 1304 | /* Drop reports with not link local source */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1305 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1306 | if (addr_type != IPV6_ADDR_ANY && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
| 1308 | return -EINVAL; |
| 1309 | |
| 1310 | addrp = (struct in6_addr *) (hdr + 1); |
| 1311 | |
| 1312 | idev = in6_dev_get(skb->dev); |
| 1313 | if (idev == NULL) |
| 1314 | return -ENODEV; |
| 1315 | |
| 1316 | /* |
| 1317 | * Cancel the timer for this group |
| 1318 | */ |
| 1319 | |
| 1320 | read_lock_bh(&idev->lock); |
| 1321 | for (ma = idev->mc_list; ma; ma=ma->next) { |
| 1322 | if (ipv6_addr_equal(&ma->mca_addr, addrp)) { |
| 1323 | spin_lock(&ma->mca_lock); |
| 1324 | if (del_timer(&ma->mca_timer)) |
| 1325 | atomic_dec(&ma->mca_refcnt); |
| 1326 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); |
| 1327 | spin_unlock(&ma->mca_lock); |
| 1328 | break; |
| 1329 | } |
| 1330 | } |
| 1331 | read_unlock_bh(&idev->lock); |
| 1332 | in6_dev_put(idev); |
| 1333 | return 0; |
| 1334 | } |
| 1335 | |
| 1336 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
| 1337 | int gdeleted, int sdeleted) |
| 1338 | { |
| 1339 | switch (type) { |
| 1340 | case MLD2_MODE_IS_INCLUDE: |
| 1341 | case MLD2_MODE_IS_EXCLUDE: |
| 1342 | if (gdeleted || sdeleted) |
| 1343 | return 0; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1344 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
| 1345 | if (pmc->mca_sfmode == MCAST_INCLUDE) |
| 1346 | return 1; |
| 1347 | /* don't include if this source is excluded |
| 1348 | * in all filters |
| 1349 | */ |
| 1350 | if (psf->sf_count[MCAST_INCLUDE]) |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1351 | return type == MLD2_MODE_IS_INCLUDE; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1352 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
| 1353 | psf->sf_count[MCAST_EXCLUDE]; |
| 1354 | } |
| 1355 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | case MLD2_CHANGE_TO_INCLUDE: |
| 1357 | if (gdeleted || sdeleted) |
| 1358 | return 0; |
| 1359 | return psf->sf_count[MCAST_INCLUDE] != 0; |
| 1360 | case MLD2_CHANGE_TO_EXCLUDE: |
| 1361 | if (gdeleted || sdeleted) |
| 1362 | return 0; |
| 1363 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
| 1364 | psf->sf_count[MCAST_INCLUDE]) |
| 1365 | return 0; |
| 1366 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
| 1367 | psf->sf_count[MCAST_EXCLUDE]; |
| 1368 | case MLD2_ALLOW_NEW_SOURCES: |
| 1369 | if (gdeleted || !psf->sf_crcount) |
| 1370 | return 0; |
| 1371 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
| 1372 | case MLD2_BLOCK_OLD_SOURCES: |
| 1373 | if (pmc->mca_sfmode == MCAST_INCLUDE) |
| 1374 | return gdeleted || (psf->sf_crcount && sdeleted); |
| 1375 | return psf->sf_crcount && !gdeleted && !sdeleted; |
| 1376 | } |
| 1377 | return 0; |
| 1378 | } |
| 1379 | |
| 1380 | static int |
| 1381 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) |
| 1382 | { |
| 1383 | struct ip6_sf_list *psf; |
| 1384 | int scount = 0; |
| 1385 | |
| 1386 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1387 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
| 1388 | continue; |
| 1389 | scount++; |
| 1390 | } |
| 1391 | return scount; |
| 1392 | } |
| 1393 | |
| 1394 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) |
| 1395 | { |
| 1396 | struct sock *sk = igmp6_socket->sk; |
| 1397 | struct sk_buff *skb; |
| 1398 | struct mld2_report *pmr; |
| 1399 | struct in6_addr addr_buf; |
| 1400 | int err; |
| 1401 | u8 ra[8] = { IPPROTO_ICMPV6, 0, |
| 1402 | IPV6_TLV_ROUTERALERT, 2, 0, 0, |
| 1403 | IPV6_TLV_PADN, 0 }; |
| 1404 | |
| 1405 | /* we assume size > sizeof(ra) here */ |
| 1406 | skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err); |
| 1407 | |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 1408 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | return NULL; |
| 1410 | |
| 1411 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1413 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | /* <draft-ietf-magma-mld-source-05.txt>: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1415 | * use unspecified address as the source address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | * when a valid link-local address is not available. |
| 1417 | */ |
| 1418 | memset(&addr_buf, 0, sizeof(addr_buf)); |
| 1419 | } |
| 1420 | |
| 1421 | ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0); |
| 1422 | |
| 1423 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); |
| 1424 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1425 | 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] | 1426 | skb_put(skb, sizeof(*pmr)); |
| 1427 | pmr = (struct mld2_report *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | pmr->type = ICMPV6_MLD2_REPORT; |
| 1429 | pmr->resv1 = 0; |
| 1430 | pmr->csum = 0; |
| 1431 | pmr->resv2 = 0; |
| 1432 | pmr->ngrec = 0; |
| 1433 | return skb; |
| 1434 | } |
| 1435 | |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1436 | static inline int mld_dev_queue_xmit2(struct sk_buff *skb) |
| 1437 | { |
| 1438 | struct net_device *dev = skb->dev; |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1439 | unsigned char ha[MAX_ADDR_LEN]; |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1440 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1441 | ndisc_mc_map(&ipv6_hdr(skb)->daddr, ha, dev, 1); |
| 1442 | if (dev_hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len) < 0) { |
| 1443 | kfree_skb(skb); |
| 1444 | return -EINVAL; |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1445 | } |
| 1446 | return dev_queue_xmit(skb); |
| 1447 | } |
| 1448 | |
| 1449 | static inline int mld_dev_queue_xmit(struct sk_buff *skb) |
| 1450 | { |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 1451 | return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb->dev, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1452 | mld_dev_queue_xmit2); |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1453 | } |
| 1454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | static void mld_sendpack(struct sk_buff *skb) |
| 1456 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1457 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1458 | struct mld2_report *pmr = |
| 1459 | (struct mld2_report *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | int payload_len, mldlen; |
| 1461 | struct inet6_dev *idev = in6_dev_get(skb->dev); |
| 1462 | int err; |
| 1463 | |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1464 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1465 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
| 1466 | mldlen = skb->tail - skb->transport_header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | pip6->payload_len = htons(payload_len); |
| 1468 | |
| 1469 | pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1470 | IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb), |
| 1471 | mldlen, 0)); |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 1472 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1473 | mld_dev_queue_xmit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | if (!err) { |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 1475 | ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT); |
| 1476 | ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS); |
| 1477 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | } else |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 1479 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
| 1481 | if (likely(idev != NULL)) |
| 1482 | in6_dev_put(idev); |
| 1483 | } |
| 1484 | |
| 1485 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) |
| 1486 | { |
Yan Zheng | fab10fe | 2005-10-05 12:08:13 -0700 | [diff] [blame] | 1487 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
| 1489 | |
| 1490 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, |
| 1491 | int type, struct mld2_grec **ppgr) |
| 1492 | { |
| 1493 | struct net_device *dev = pmc->idev->dev; |
| 1494 | struct mld2_report *pmr; |
| 1495 | struct mld2_grec *pgr; |
| 1496 | |
| 1497 | if (!skb) |
| 1498 | skb = mld_newpack(dev, dev->mtu); |
| 1499 | if (!skb) |
| 1500 | return NULL; |
| 1501 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); |
| 1502 | pgr->grec_type = type; |
| 1503 | pgr->grec_auxwords = 0; |
| 1504 | pgr->grec_nsrcs = 0; |
| 1505 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1506 | pmr = (struct mld2_report *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | pmr->ngrec = htons(ntohs(pmr->ngrec)+1); |
| 1508 | *ppgr = pgr; |
| 1509 | return skb; |
| 1510 | } |
| 1511 | |
| 1512 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ |
| 1513 | skb_tailroom(skb)) : 0) |
| 1514 | |
| 1515 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, |
| 1516 | int type, int gdeleted, int sdeleted) |
| 1517 | { |
| 1518 | struct net_device *dev = pmc->idev->dev; |
| 1519 | struct mld2_report *pmr; |
| 1520 | struct mld2_grec *pgr = NULL; |
| 1521 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1522 | int scount, stotal, first, isquery, truncate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | |
| 1524 | if (pmc->mca_flags & MAF_NOREPORT) |
| 1525 | return skb; |
| 1526 | |
| 1527 | isquery = type == MLD2_MODE_IS_INCLUDE || |
| 1528 | type == MLD2_MODE_IS_EXCLUDE; |
| 1529 | truncate = type == MLD2_MODE_IS_EXCLUDE || |
| 1530 | type == MLD2_CHANGE_TO_EXCLUDE; |
| 1531 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1532 | stotal = scount = 0; |
| 1533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
| 1535 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1536 | if (!*psf_list) |
| 1537 | goto empty_source; |
| 1538 | |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1539 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
| 1541 | /* EX and TO_EX get a fresh packet, if needed */ |
| 1542 | if (truncate) { |
| 1543 | if (pmr && pmr->ngrec && |
| 1544 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
| 1545 | if (skb) |
| 1546 | mld_sendpack(skb); |
| 1547 | skb = mld_newpack(dev, dev->mtu); |
| 1548 | } |
| 1549 | } |
| 1550 | first = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | psf_prev = NULL; |
| 1552 | for (psf=*psf_list; psf; psf=psf_next) { |
| 1553 | struct in6_addr *psrc; |
| 1554 | |
| 1555 | psf_next = psf->sf_next; |
| 1556 | |
| 1557 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { |
| 1558 | psf_prev = psf; |
| 1559 | continue; |
| 1560 | } |
| 1561 | |
| 1562 | /* clear marks on query responses */ |
| 1563 | if (isquery) |
| 1564 | psf->sf_gsresp = 0; |
| 1565 | |
| 1566 | if (AVAILABLE(skb) < sizeof(*psrc) + |
| 1567 | first*sizeof(struct mld2_grec)) { |
| 1568 | if (truncate && !first) |
| 1569 | break; /* truncate these */ |
| 1570 | if (pgr) |
| 1571 | pgr->grec_nsrcs = htons(scount); |
| 1572 | if (skb) |
| 1573 | mld_sendpack(skb); |
| 1574 | skb = mld_newpack(dev, dev->mtu); |
| 1575 | first = 1; |
| 1576 | scount = 0; |
| 1577 | } |
| 1578 | if (first) { |
| 1579 | skb = add_grhead(skb, pmc, type, &pgr); |
| 1580 | first = 0; |
| 1581 | } |
Alexey Dobriyan | cc63f70 | 2007-02-06 14:35:25 -0800 | [diff] [blame] | 1582 | if (!skb) |
| 1583 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
| 1585 | *psrc = psf->sf_addr; |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1586 | scount++; stotal++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
| 1588 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { |
| 1589 | psf->sf_crcount--; |
| 1590 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { |
| 1591 | if (psf_prev) |
| 1592 | psf_prev->sf_next = psf->sf_next; |
| 1593 | else |
| 1594 | *psf_list = psf->sf_next; |
| 1595 | kfree(psf); |
| 1596 | continue; |
| 1597 | } |
| 1598 | } |
| 1599 | psf_prev = psf; |
| 1600 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1601 | |
| 1602 | empty_source: |
| 1603 | if (!stotal) { |
| 1604 | if (type == MLD2_ALLOW_NEW_SOURCES || |
| 1605 | type == MLD2_BLOCK_OLD_SOURCES) |
| 1606 | return skb; |
| 1607 | if (pmc->mca_crcount || isquery) { |
| 1608 | /* make sure we have room for group header */ |
| 1609 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { |
| 1610 | mld_sendpack(skb); |
| 1611 | skb = NULL; /* add_grhead will get a new one */ |
| 1612 | } |
| 1613 | skb = add_grhead(skb, pmc, type, &pgr); |
| 1614 | } |
| 1615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | if (pgr) |
| 1617 | pgr->grec_nsrcs = htons(scount); |
| 1618 | |
| 1619 | if (isquery) |
| 1620 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ |
| 1621 | return skb; |
| 1622 | } |
| 1623 | |
| 1624 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) |
| 1625 | { |
| 1626 | struct sk_buff *skb = NULL; |
| 1627 | int type; |
| 1628 | |
| 1629 | if (!pmc) { |
| 1630 | read_lock_bh(&idev->lock); |
| 1631 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1632 | if (pmc->mca_flags & MAF_NOREPORT) |
| 1633 | continue; |
| 1634 | spin_lock_bh(&pmc->mca_lock); |
| 1635 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 1636 | type = MLD2_MODE_IS_EXCLUDE; |
| 1637 | else |
| 1638 | type = MLD2_MODE_IS_INCLUDE; |
| 1639 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1640 | spin_unlock_bh(&pmc->mca_lock); |
| 1641 | } |
| 1642 | read_unlock_bh(&idev->lock); |
| 1643 | } else { |
| 1644 | spin_lock_bh(&pmc->mca_lock); |
| 1645 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 1646 | type = MLD2_MODE_IS_EXCLUDE; |
| 1647 | else |
| 1648 | type = MLD2_MODE_IS_INCLUDE; |
| 1649 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1650 | spin_unlock_bh(&pmc->mca_lock); |
| 1651 | } |
| 1652 | if (skb) |
| 1653 | mld_sendpack(skb); |
| 1654 | } |
| 1655 | |
| 1656 | /* |
| 1657 | * remove zero-count source records from a source filter list |
| 1658 | */ |
| 1659 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) |
| 1660 | { |
| 1661 | struct ip6_sf_list *psf_prev, *psf_next, *psf; |
| 1662 | |
| 1663 | psf_prev = NULL; |
| 1664 | for (psf=*ppsf; psf; psf = psf_next) { |
| 1665 | psf_next = psf->sf_next; |
| 1666 | if (psf->sf_crcount == 0) { |
| 1667 | if (psf_prev) |
| 1668 | psf_prev->sf_next = psf->sf_next; |
| 1669 | else |
| 1670 | *ppsf = psf->sf_next; |
| 1671 | kfree(psf); |
| 1672 | } else |
| 1673 | psf_prev = psf; |
| 1674 | } |
| 1675 | } |
| 1676 | |
| 1677 | static void mld_send_cr(struct inet6_dev *idev) |
| 1678 | { |
| 1679 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; |
| 1680 | struct sk_buff *skb = NULL; |
| 1681 | int type, dtype; |
| 1682 | |
| 1683 | read_lock_bh(&idev->lock); |
| 1684 | write_lock_bh(&idev->mc_lock); |
| 1685 | |
| 1686 | /* deleted MCA's */ |
| 1687 | pmc_prev = NULL; |
| 1688 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { |
| 1689 | pmc_next = pmc->next; |
| 1690 | if (pmc->mca_sfmode == MCAST_INCLUDE) { |
| 1691 | type = MLD2_BLOCK_OLD_SOURCES; |
| 1692 | dtype = MLD2_BLOCK_OLD_SOURCES; |
| 1693 | skb = add_grec(skb, pmc, type, 1, 0); |
| 1694 | skb = add_grec(skb, pmc, dtype, 1, 1); |
| 1695 | } |
| 1696 | if (pmc->mca_crcount) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
| 1698 | type = MLD2_CHANGE_TO_INCLUDE; |
| 1699 | skb = add_grec(skb, pmc, type, 1, 0); |
| 1700 | } |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1701 | pmc->mca_crcount--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | if (pmc->mca_crcount == 0) { |
| 1703 | mld_clear_zeros(&pmc->mca_tomb); |
| 1704 | mld_clear_zeros(&pmc->mca_sources); |
| 1705 | } |
| 1706 | } |
| 1707 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && |
| 1708 | !pmc->mca_sources) { |
| 1709 | if (pmc_prev) |
| 1710 | pmc_prev->next = pmc_next; |
| 1711 | else |
| 1712 | idev->mc_tomb = pmc_next; |
| 1713 | in6_dev_put(pmc->idev); |
| 1714 | kfree(pmc); |
| 1715 | } else |
| 1716 | pmc_prev = pmc; |
| 1717 | } |
| 1718 | write_unlock_bh(&idev->mc_lock); |
| 1719 | |
| 1720 | /* change recs */ |
| 1721 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1722 | spin_lock_bh(&pmc->mca_lock); |
| 1723 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1724 | type = MLD2_BLOCK_OLD_SOURCES; |
| 1725 | dtype = MLD2_ALLOW_NEW_SOURCES; |
| 1726 | } else { |
| 1727 | type = MLD2_ALLOW_NEW_SOURCES; |
| 1728 | dtype = MLD2_BLOCK_OLD_SOURCES; |
| 1729 | } |
| 1730 | skb = add_grec(skb, pmc, type, 0, 0); |
| 1731 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ |
| 1732 | |
| 1733 | /* filter mode changes */ |
| 1734 | if (pmc->mca_crcount) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
| 1736 | type = MLD2_CHANGE_TO_EXCLUDE; |
| 1737 | else |
| 1738 | type = MLD2_CHANGE_TO_INCLUDE; |
| 1739 | skb = add_grec(skb, pmc, type, 0, 0); |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 1740 | pmc->mca_crcount--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | } |
| 1742 | spin_unlock_bh(&pmc->mca_lock); |
| 1743 | } |
| 1744 | read_unlock_bh(&idev->lock); |
| 1745 | if (!skb) |
| 1746 | return; |
| 1747 | (void) mld_sendpack(skb); |
| 1748 | } |
| 1749 | |
| 1750 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) |
| 1751 | { |
| 1752 | struct sock *sk = igmp6_socket->sk; |
| 1753 | struct inet6_dev *idev; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1754 | struct sk_buff *skb; |
| 1755 | struct icmp6hdr *hdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | struct in6_addr *snd_addr; |
| 1757 | struct in6_addr *addrp; |
| 1758 | struct in6_addr addr_buf; |
| 1759 | struct in6_addr all_routers; |
| 1760 | int err, len, payload_len, full_len; |
| 1761 | u8 ra[8] = { IPPROTO_ICMPV6, 0, |
| 1762 | IPV6_TLV_ROUTERALERT, 2, 0, 0, |
| 1763 | IPV6_TLV_PADN, 0 }; |
| 1764 | |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1765 | rcu_read_lock(); |
| 1766 | IP6_INC_STATS(__in6_dev_get(dev), |
| 1767 | IPSTATS_MIB_OUTREQUESTS); |
| 1768 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | snd_addr = addr; |
| 1770 | if (type == ICMPV6_MGM_REDUCTION) { |
| 1771 | snd_addr = &all_routers; |
| 1772 | ipv6_addr_all_routers(&all_routers); |
| 1773 | } |
| 1774 | |
| 1775 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); |
| 1776 | payload_len = len + sizeof(ra); |
| 1777 | full_len = sizeof(struct ipv6hdr) + payload_len; |
| 1778 | |
| 1779 | skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err); |
| 1780 | |
| 1781 | if (skb == NULL) { |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1782 | rcu_read_lock(); |
| 1783 | IP6_INC_STATS(__in6_dev_get(dev), |
| 1784 | IPSTATS_MIB_OUTDISCARDS); |
| 1785 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | return; |
| 1787 | } |
| 1788 | |
| 1789 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | |
Neil Horman | 95c385b | 2007-04-25 17:08:10 -0700 | [diff] [blame] | 1791 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | /* <draft-ietf-magma-mld-source-05.txt>: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1793 | * use unspecified address as the source address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | * when a valid link-local address is not available. |
| 1795 | */ |
| 1796 | memset(&addr_buf, 0, sizeof(addr_buf)); |
| 1797 | } |
| 1798 | |
| 1799 | ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len); |
| 1800 | |
| 1801 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); |
| 1802 | |
| 1803 | hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr)); |
| 1804 | memset(hdr, 0, sizeof(struct icmp6hdr)); |
| 1805 | hdr->icmp6_type = type; |
| 1806 | |
| 1807 | addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr)); |
| 1808 | ipv6_addr_copy(addrp, addr); |
| 1809 | |
| 1810 | hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len, |
| 1811 | IPPROTO_ICMPV6, |
| 1812 | csum_partial((__u8 *) hdr, len, 0)); |
| 1813 | |
| 1814 | idev = in6_dev_get(skb->dev); |
| 1815 | |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 1816 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
Patrick McHardy | e982318 | 2005-06-21 14:02:15 -0700 | [diff] [blame] | 1817 | mld_dev_queue_xmit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | if (!err) { |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 1819 | ICMP6MSGOUT_INC_STATS(idev, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1821 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | } else |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 1823 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | |
| 1825 | if (likely(idev != NULL)) |
| 1826 | in6_dev_put(idev); |
| 1827 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | } |
| 1829 | |
| 1830 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
| 1831 | struct in6_addr *psfsrc) |
| 1832 | { |
| 1833 | struct ip6_sf_list *psf, *psf_prev; |
| 1834 | int rv = 0; |
| 1835 | |
| 1836 | psf_prev = NULL; |
| 1837 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1838 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
| 1839 | break; |
| 1840 | psf_prev = psf; |
| 1841 | } |
| 1842 | if (!psf || psf->sf_count[sfmode] == 0) { |
| 1843 | /* source filter not found, or count wrong => bug */ |
| 1844 | return -ESRCH; |
| 1845 | } |
| 1846 | psf->sf_count[sfmode]--; |
| 1847 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { |
| 1848 | struct inet6_dev *idev = pmc->idev; |
| 1849 | |
| 1850 | /* no more filters for this source */ |
| 1851 | if (psf_prev) |
| 1852 | psf_prev->sf_next = psf->sf_next; |
| 1853 | else |
| 1854 | pmc->mca_sources = psf->sf_next; |
| 1855 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && |
| 1856 | !MLD_V1_SEEN(idev)) { |
| 1857 | psf->sf_crcount = idev->mc_qrv; |
| 1858 | psf->sf_next = pmc->mca_tomb; |
| 1859 | pmc->mca_tomb = psf; |
| 1860 | rv = 1; |
| 1861 | } else |
| 1862 | kfree(psf); |
| 1863 | } |
| 1864 | return rv; |
| 1865 | } |
| 1866 | |
| 1867 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 1868 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 1869 | int delta) |
| 1870 | { |
| 1871 | struct ifmcaddr6 *pmc; |
| 1872 | int changerec = 0; |
| 1873 | int i, err; |
| 1874 | |
| 1875 | if (!idev) |
| 1876 | return -ENODEV; |
| 1877 | read_lock_bh(&idev->lock); |
| 1878 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 1879 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
| 1880 | break; |
| 1881 | } |
| 1882 | if (!pmc) { |
| 1883 | /* MCA not found?? bug */ |
| 1884 | read_unlock_bh(&idev->lock); |
| 1885 | return -ESRCH; |
| 1886 | } |
| 1887 | spin_lock_bh(&pmc->mca_lock); |
| 1888 | sf_markstate(pmc); |
| 1889 | if (!delta) { |
| 1890 | if (!pmc->mca_sfcount[sfmode]) { |
| 1891 | spin_unlock_bh(&pmc->mca_lock); |
| 1892 | read_unlock_bh(&idev->lock); |
| 1893 | return -EINVAL; |
| 1894 | } |
| 1895 | pmc->mca_sfcount[sfmode]--; |
| 1896 | } |
| 1897 | err = 0; |
| 1898 | for (i=0; i<sfcount; i++) { |
| 1899 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
| 1900 | |
| 1901 | changerec |= rv > 0; |
| 1902 | if (!err && rv < 0) |
| 1903 | err = rv; |
| 1904 | } |
| 1905 | if (pmc->mca_sfmode == MCAST_EXCLUDE && |
| 1906 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && |
| 1907 | pmc->mca_sfcount[MCAST_INCLUDE]) { |
| 1908 | struct ip6_sf_list *psf; |
| 1909 | |
| 1910 | /* filter mode change */ |
| 1911 | pmc->mca_sfmode = MCAST_INCLUDE; |
| 1912 | pmc->mca_crcount = idev->mc_qrv; |
| 1913 | idev->mc_ifc_count = pmc->mca_crcount; |
| 1914 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) |
| 1915 | psf->sf_crcount = 0; |
| 1916 | mld_ifc_event(pmc->idev); |
| 1917 | } else if (sf_setstate(pmc) || changerec) |
| 1918 | mld_ifc_event(pmc->idev); |
| 1919 | spin_unlock_bh(&pmc->mca_lock); |
| 1920 | read_unlock_bh(&idev->lock); |
| 1921 | return err; |
| 1922 | } |
| 1923 | |
| 1924 | /* |
| 1925 | * Add multicast single-source filter to the interface list |
| 1926 | */ |
| 1927 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, |
| 1928 | struct in6_addr *psfsrc, int delta) |
| 1929 | { |
| 1930 | struct ip6_sf_list *psf, *psf_prev; |
| 1931 | |
| 1932 | psf_prev = NULL; |
| 1933 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1934 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
| 1935 | break; |
| 1936 | psf_prev = psf; |
| 1937 | } |
| 1938 | if (!psf) { |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 1939 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | if (!psf) |
| 1941 | return -ENOBUFS; |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 1942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | psf->sf_addr = *psfsrc; |
| 1944 | if (psf_prev) { |
| 1945 | psf_prev->sf_next = psf; |
| 1946 | } else |
| 1947 | pmc->mca_sources = psf; |
| 1948 | } |
| 1949 | psf->sf_count[sfmode]++; |
| 1950 | return 0; |
| 1951 | } |
| 1952 | |
| 1953 | static void sf_markstate(struct ifmcaddr6 *pmc) |
| 1954 | { |
| 1955 | struct ip6_sf_list *psf; |
| 1956 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
| 1957 | |
| 1958 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) |
| 1959 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1960 | psf->sf_oldin = mca_xcount == |
| 1961 | psf->sf_count[MCAST_EXCLUDE] && |
| 1962 | !psf->sf_count[MCAST_INCLUDE]; |
| 1963 | } else |
| 1964 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; |
| 1965 | } |
| 1966 | |
| 1967 | static int sf_setstate(struct ifmcaddr6 *pmc) |
| 1968 | { |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1969 | struct ip6_sf_list *psf, *dpsf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
| 1971 | int qrv = pmc->idev->mc_qrv; |
| 1972 | int new_in, rv; |
| 1973 | |
| 1974 | rv = 0; |
| 1975 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { |
| 1976 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
| 1977 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && |
| 1978 | !psf->sf_count[MCAST_INCLUDE]; |
| 1979 | } else |
| 1980 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1981 | if (new_in) { |
| 1982 | if (!psf->sf_oldin) { |
Al Viro | e80e28b | 2006-02-03 20:10:03 -0500 | [diff] [blame] | 1983 | struct ip6_sf_list *prev = NULL; |
David L Stevens | 7add2a4 | 2006-01-24 13:06:39 -0800 | [diff] [blame] | 1984 | |
| 1985 | for (dpsf=pmc->mca_tomb; dpsf; |
| 1986 | dpsf=dpsf->sf_next) { |
| 1987 | if (ipv6_addr_equal(&dpsf->sf_addr, |
| 1988 | &psf->sf_addr)) |
| 1989 | break; |
| 1990 | prev = dpsf; |
| 1991 | } |
| 1992 | if (dpsf) { |
| 1993 | if (prev) |
| 1994 | prev->sf_next = dpsf->sf_next; |
| 1995 | else |
| 1996 | pmc->mca_tomb = dpsf->sf_next; |
| 1997 | kfree(dpsf); |
| 1998 | } |
| 1999 | psf->sf_crcount = qrv; |
| 2000 | rv++; |
| 2001 | } |
| 2002 | } else if (psf->sf_oldin) { |
| 2003 | psf->sf_crcount = 0; |
| 2004 | /* |
| 2005 | * add or update "delete" records if an active filter |
| 2006 | * is now inactive |
| 2007 | */ |
| 2008 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) |
| 2009 | if (ipv6_addr_equal(&dpsf->sf_addr, |
| 2010 | &psf->sf_addr)) |
| 2011 | break; |
| 2012 | if (!dpsf) { |
| 2013 | dpsf = (struct ip6_sf_list *) |
| 2014 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
| 2015 | if (!dpsf) |
| 2016 | continue; |
| 2017 | *dpsf = *psf; |
| 2018 | /* pmc->mca_lock held by callers */ |
| 2019 | dpsf->sf_next = pmc->mca_tomb; |
| 2020 | pmc->mca_tomb = dpsf; |
| 2021 | } |
| 2022 | dpsf->sf_crcount = qrv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | rv++; |
| 2024 | } |
| 2025 | } |
| 2026 | return rv; |
| 2027 | } |
| 2028 | |
| 2029 | /* |
| 2030 | * Add multicast source filter list to the interface list |
| 2031 | */ |
| 2032 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, |
| 2033 | int sfmode, int sfcount, struct in6_addr *psfsrc, |
| 2034 | int delta) |
| 2035 | { |
| 2036 | struct ifmcaddr6 *pmc; |
| 2037 | int isexclude; |
| 2038 | int i, err; |
| 2039 | |
| 2040 | if (!idev) |
| 2041 | return -ENODEV; |
| 2042 | read_lock_bh(&idev->lock); |
| 2043 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
| 2044 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
| 2045 | break; |
| 2046 | } |
| 2047 | if (!pmc) { |
| 2048 | /* MCA not found?? bug */ |
| 2049 | read_unlock_bh(&idev->lock); |
| 2050 | return -ESRCH; |
| 2051 | } |
| 2052 | spin_lock_bh(&pmc->mca_lock); |
| 2053 | |
| 2054 | sf_markstate(pmc); |
| 2055 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; |
| 2056 | if (!delta) |
| 2057 | pmc->mca_sfcount[sfmode]++; |
| 2058 | err = 0; |
| 2059 | for (i=0; i<sfcount; i++) { |
| 2060 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); |
| 2061 | if (err) |
| 2062 | break; |
| 2063 | } |
| 2064 | if (err) { |
| 2065 | int j; |
| 2066 | |
| 2067 | if (!delta) |
| 2068 | pmc->mca_sfcount[sfmode]--; |
| 2069 | for (j=0; j<i; j++) |
| 2070 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
| 2071 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
| 2072 | struct inet6_dev *idev = pmc->idev; |
| 2073 | struct ip6_sf_list *psf; |
| 2074 | |
| 2075 | /* filter mode change */ |
| 2076 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) |
| 2077 | pmc->mca_sfmode = MCAST_EXCLUDE; |
| 2078 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) |
| 2079 | pmc->mca_sfmode = MCAST_INCLUDE; |
| 2080 | /* else no filters; keep old mode for reports */ |
| 2081 | |
| 2082 | pmc->mca_crcount = idev->mc_qrv; |
| 2083 | idev->mc_ifc_count = pmc->mca_crcount; |
| 2084 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) |
| 2085 | psf->sf_crcount = 0; |
| 2086 | mld_ifc_event(idev); |
| 2087 | } else if (sf_setstate(pmc)) |
| 2088 | mld_ifc_event(idev); |
| 2089 | spin_unlock_bh(&pmc->mca_lock); |
| 2090 | read_unlock_bh(&idev->lock); |
| 2091 | return err; |
| 2092 | } |
| 2093 | |
| 2094 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) |
| 2095 | { |
| 2096 | struct ip6_sf_list *psf, *nextpsf; |
| 2097 | |
| 2098 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { |
| 2099 | nextpsf = psf->sf_next; |
| 2100 | kfree(psf); |
| 2101 | } |
| 2102 | pmc->mca_tomb = NULL; |
| 2103 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { |
| 2104 | nextpsf = psf->sf_next; |
| 2105 | kfree(psf); |
| 2106 | } |
| 2107 | pmc->mca_sources = NULL; |
| 2108 | pmc->mca_sfmode = MCAST_EXCLUDE; |
Denis Lukianov | de9daad | 2005-09-14 20:53:42 -0700 | [diff] [blame] | 2109 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
| 2111 | } |
| 2112 | |
| 2113 | |
| 2114 | static void igmp6_join_group(struct ifmcaddr6 *ma) |
| 2115 | { |
| 2116 | unsigned long delay; |
| 2117 | |
| 2118 | if (ma->mca_flags & MAF_NOREPORT) |
| 2119 | return; |
| 2120 | |
| 2121 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
| 2122 | |
| 2123 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; |
| 2124 | |
| 2125 | spin_lock_bh(&ma->mca_lock); |
| 2126 | if (del_timer(&ma->mca_timer)) { |
| 2127 | atomic_dec(&ma->mca_refcnt); |
| 2128 | delay = ma->mca_timer.expires - jiffies; |
| 2129 | } |
| 2130 | |
| 2131 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) |
| 2132 | atomic_inc(&ma->mca_refcnt); |
| 2133 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; |
| 2134 | spin_unlock_bh(&ma->mca_lock); |
| 2135 | } |
| 2136 | |
| 2137 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, |
| 2138 | struct inet6_dev *idev) |
| 2139 | { |
| 2140 | int err; |
| 2141 | |
David L Stevens | 5ab4a6c | 2005-12-27 14:03:00 -0800 | [diff] [blame] | 2142 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
| 2143 | * so no other readers or writers of iml or its sflist |
| 2144 | */ |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 2145 | if (!iml->sflist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | /* any-source empty exclude case */ |
| 2147 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); |
| 2148 | } |
| 2149 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, |
| 2150 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); |
| 2151 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); |
| 2152 | iml->sflist = NULL; |
| 2153 | return err; |
| 2154 | } |
| 2155 | |
| 2156 | static void igmp6_leave_group(struct ifmcaddr6 *ma) |
| 2157 | { |
| 2158 | if (MLD_V1_SEEN(ma->idev)) { |
| 2159 | if (ma->mca_flags & MAF_LAST_REPORTER) |
| 2160 | igmp6_send(&ma->mca_addr, ma->idev->dev, |
| 2161 | ICMPV6_MGM_REDUCTION); |
| 2162 | } else { |
| 2163 | mld_add_delrec(ma->idev, ma); |
| 2164 | mld_ifc_event(ma->idev); |
| 2165 | } |
| 2166 | } |
| 2167 | |
| 2168 | static void mld_gq_timer_expire(unsigned long data) |
| 2169 | { |
| 2170 | struct inet6_dev *idev = (struct inet6_dev *)data; |
| 2171 | |
| 2172 | idev->mc_gq_running = 0; |
| 2173 | mld_send_report(idev, NULL); |
| 2174 | __in6_dev_put(idev); |
| 2175 | } |
| 2176 | |
| 2177 | static void mld_ifc_timer_expire(unsigned long data) |
| 2178 | { |
| 2179 | struct inet6_dev *idev = (struct inet6_dev *)data; |
| 2180 | |
| 2181 | mld_send_cr(idev); |
| 2182 | if (idev->mc_ifc_count) { |
| 2183 | idev->mc_ifc_count--; |
| 2184 | if (idev->mc_ifc_count) |
| 2185 | mld_ifc_start_timer(idev, idev->mc_maxdelay); |
| 2186 | } |
| 2187 | __in6_dev_put(idev); |
| 2188 | } |
| 2189 | |
| 2190 | static void mld_ifc_event(struct inet6_dev *idev) |
| 2191 | { |
| 2192 | if (MLD_V1_SEEN(idev)) |
| 2193 | return; |
| 2194 | idev->mc_ifc_count = idev->mc_qrv; |
| 2195 | mld_ifc_start_timer(idev, 1); |
| 2196 | } |
| 2197 | |
| 2198 | |
| 2199 | static void igmp6_timer_handler(unsigned long data) |
| 2200 | { |
| 2201 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; |
| 2202 | |
| 2203 | if (MLD_V1_SEEN(ma->idev)) |
| 2204 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
| 2205 | else |
| 2206 | mld_send_report(ma->idev, ma); |
| 2207 | |
| 2208 | spin_lock(&ma->mca_lock); |
| 2209 | ma->mca_flags |= MAF_LAST_REPORTER; |
| 2210 | ma->mca_flags &= ~MAF_TIMER_RUNNING; |
| 2211 | spin_unlock(&ma->mca_lock); |
| 2212 | ma_put(ma); |
| 2213 | } |
| 2214 | |
| 2215 | /* Device going down */ |
| 2216 | |
| 2217 | void ipv6_mc_down(struct inet6_dev *idev) |
| 2218 | { |
| 2219 | struct ifmcaddr6 *i; |
| 2220 | |
| 2221 | /* Withdraw multicast list */ |
| 2222 | |
| 2223 | read_lock_bh(&idev->lock); |
| 2224 | idev->mc_ifc_count = 0; |
| 2225 | if (del_timer(&idev->mc_ifc_timer)) |
| 2226 | __in6_dev_put(idev); |
| 2227 | idev->mc_gq_running = 0; |
| 2228 | if (del_timer(&idev->mc_gq_timer)) |
| 2229 | __in6_dev_put(idev); |
| 2230 | |
| 2231 | for (i = idev->mc_list; i; i=i->next) |
| 2232 | igmp6_group_dropped(i); |
| 2233 | read_unlock_bh(&idev->lock); |
| 2234 | |
| 2235 | mld_clear_delrec(idev); |
| 2236 | } |
| 2237 | |
| 2238 | |
| 2239 | /* Device going up */ |
| 2240 | |
| 2241 | void ipv6_mc_up(struct inet6_dev *idev) |
| 2242 | { |
| 2243 | struct ifmcaddr6 *i; |
| 2244 | |
| 2245 | /* Install multicast list, except for all-nodes (already installed) */ |
| 2246 | |
| 2247 | read_lock_bh(&idev->lock); |
| 2248 | for (i = idev->mc_list; i; i=i->next) |
| 2249 | igmp6_group_added(i); |
| 2250 | read_unlock_bh(&idev->lock); |
| 2251 | } |
| 2252 | |
| 2253 | /* IPv6 device initialization. */ |
| 2254 | |
| 2255 | void ipv6_mc_init_dev(struct inet6_dev *idev) |
| 2256 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | write_lock_bh(&idev->lock); |
| 2258 | rwlock_init(&idev->mc_lock); |
| 2259 | idev->mc_gq_running = 0; |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 2260 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
| 2261 | (unsigned long)idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | idev->mc_tomb = NULL; |
| 2263 | idev->mc_ifc_count = 0; |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 2264 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
| 2265 | (unsigned long)idev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | idev->mc_qrv = MLD_QRV_DEFAULT; |
| 2267 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; |
| 2268 | idev->mc_v1_seen = 0; |
| 2269 | write_unlock_bh(&idev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | } |
| 2271 | |
| 2272 | /* |
| 2273 | * Device is about to be destroyed: clean up. |
| 2274 | */ |
| 2275 | |
| 2276 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) |
| 2277 | { |
| 2278 | struct ifmcaddr6 *i; |
| 2279 | struct in6_addr maddr; |
| 2280 | |
| 2281 | /* Deactivate timers */ |
| 2282 | ipv6_mc_down(idev); |
| 2283 | |
| 2284 | /* Delete all-nodes address. */ |
| 2285 | ipv6_addr_all_nodes(&maddr); |
| 2286 | |
| 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 | */ |
| 2291 | __ipv6_dev_mc_dec(idev, &maddr); |
| 2292 | |
| 2293 | if (idev->cnf.forwarding) { |
| 2294 | ipv6_addr_all_routers(&maddr); |
| 2295 | __ipv6_dev_mc_dec(idev, &maddr); |
| 2296 | } |
| 2297 | |
| 2298 | write_lock_bh(&idev->lock); |
| 2299 | while ((i = idev->mc_list) != NULL) { |
| 2300 | idev->mc_list = i->next; |
| 2301 | write_unlock_bh(&idev->lock); |
| 2302 | |
| 2303 | igmp6_group_dropped(i); |
| 2304 | ma_put(i); |
| 2305 | |
| 2306 | write_lock_bh(&idev->lock); |
| 2307 | } |
| 2308 | write_unlock_bh(&idev->lock); |
| 2309 | } |
| 2310 | |
| 2311 | #ifdef CONFIG_PROC_FS |
| 2312 | struct igmp6_mc_iter_state { |
| 2313 | struct net_device *dev; |
| 2314 | struct inet6_dev *idev; |
| 2315 | }; |
| 2316 | |
| 2317 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) |
| 2318 | |
| 2319 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) |
| 2320 | { |
| 2321 | struct ifmcaddr6 *im = NULL; |
| 2322 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2323 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2324 | state->idev = NULL; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 2325 | for_each_netdev(&init_net, state->dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | struct inet6_dev *idev; |
| 2327 | idev = in6_dev_get(state->dev); |
| 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); |
| 2337 | in6_dev_put(idev); |
| 2338 | } |
| 2339 | return im; |
| 2340 | } |
| 2341 | |
| 2342 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) |
| 2343 | { |
| 2344 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2345 | |
| 2346 | im = im->next; |
| 2347 | while (!im) { |
| 2348 | if (likely(state->idev != NULL)) { |
| 2349 | read_unlock_bh(&state->idev->lock); |
| 2350 | in6_dev_put(state->idev); |
| 2351 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2352 | state->dev = next_net_device(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | if (!state->dev) { |
| 2354 | state->idev = NULL; |
| 2355 | break; |
| 2356 | } |
| 2357 | state->idev = in6_dev_get(state->dev); |
| 2358 | if (!state->idev) |
| 2359 | continue; |
| 2360 | read_lock_bh(&state->idev->lock); |
| 2361 | im = state->idev->mc_list; |
| 2362 | } |
| 2363 | return im; |
| 2364 | } |
| 2365 | |
| 2366 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) |
| 2367 | { |
| 2368 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); |
| 2369 | if (im) |
| 2370 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) |
| 2371 | --pos; |
| 2372 | return pos ? NULL : im; |
| 2373 | } |
| 2374 | |
| 2375 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2376 | __acquires(dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | { |
| 2378 | read_lock(&dev_base_lock); |
| 2379 | return igmp6_mc_get_idx(seq, *pos); |
| 2380 | } |
| 2381 | |
| 2382 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2383 | { |
| 2384 | struct ifmcaddr6 *im; |
| 2385 | im = igmp6_mc_get_next(seq, v); |
| 2386 | ++*pos; |
| 2387 | return im; |
| 2388 | } |
| 2389 | |
| 2390 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2391 | __releases(dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | { |
| 2393 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2394 | if (likely(state->idev != NULL)) { |
| 2395 | read_unlock_bh(&state->idev->lock); |
| 2396 | in6_dev_put(state->idev); |
| 2397 | state->idev = NULL; |
| 2398 | } |
| 2399 | state->dev = NULL; |
| 2400 | read_unlock(&dev_base_lock); |
| 2401 | } |
| 2402 | |
| 2403 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) |
| 2404 | { |
| 2405 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; |
| 2406 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); |
| 2407 | |
| 2408 | seq_printf(seq, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2409 | "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | state->dev->ifindex, state->dev->name, |
| 2411 | NIP6(im->mca_addr), |
| 2412 | im->mca_users, im->mca_flags, |
| 2413 | (im->mca_flags&MAF_TIMER_RUNNING) ? |
| 2414 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); |
| 2415 | return 0; |
| 2416 | } |
| 2417 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2418 | static const struct seq_operations igmp6_mc_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | .start = igmp6_mc_seq_start, |
| 2420 | .next = igmp6_mc_seq_next, |
| 2421 | .stop = igmp6_mc_seq_stop, |
| 2422 | .show = igmp6_mc_seq_show, |
| 2423 | }; |
| 2424 | |
| 2425 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) |
| 2426 | { |
Pavel Emelyanov | cf7732e | 2007-10-10 02:29:29 -0700 | [diff] [blame] | 2427 | return seq_open_private(file, &igmp6_mc_seq_ops, |
| 2428 | sizeof(struct igmp6_mc_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | } |
| 2430 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2431 | static const struct file_operations igmp6_mc_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | .owner = THIS_MODULE, |
| 2433 | .open = igmp6_mc_seq_open, |
| 2434 | .read = seq_read, |
| 2435 | .llseek = seq_lseek, |
| 2436 | .release = seq_release_private, |
| 2437 | }; |
| 2438 | |
| 2439 | struct igmp6_mcf_iter_state { |
| 2440 | struct net_device *dev; |
| 2441 | struct inet6_dev *idev; |
| 2442 | struct ifmcaddr6 *im; |
| 2443 | }; |
| 2444 | |
| 2445 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) |
| 2446 | |
| 2447 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) |
| 2448 | { |
| 2449 | struct ip6_sf_list *psf = NULL; |
| 2450 | struct ifmcaddr6 *im = NULL; |
| 2451 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2452 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2453 | state->idev = NULL; |
| 2454 | state->im = NULL; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 2455 | for_each_netdev(&init_net, state->dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | struct inet6_dev *idev; |
| 2457 | idev = in6_dev_get(state->dev); |
| 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); |
| 2473 | in6_dev_put(idev); |
| 2474 | } |
| 2475 | return psf; |
| 2476 | } |
| 2477 | |
| 2478 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) |
| 2479 | { |
| 2480 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2481 | |
| 2482 | psf = psf->sf_next; |
| 2483 | while (!psf) { |
| 2484 | spin_unlock_bh(&state->im->mca_lock); |
| 2485 | state->im = state->im->next; |
| 2486 | while (!state->im) { |
| 2487 | if (likely(state->idev != NULL)) { |
| 2488 | read_unlock_bh(&state->idev->lock); |
| 2489 | in6_dev_put(state->idev); |
| 2490 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 2491 | state->dev = next_net_device(state->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | if (!state->dev) { |
| 2493 | state->idev = NULL; |
| 2494 | goto out; |
| 2495 | } |
| 2496 | state->idev = in6_dev_get(state->dev); |
| 2497 | if (!state->idev) |
| 2498 | continue; |
| 2499 | read_lock_bh(&state->idev->lock); |
| 2500 | state->im = state->idev->mc_list; |
| 2501 | } |
| 2502 | if (!state->im) |
| 2503 | break; |
| 2504 | spin_lock_bh(&state->im->mca_lock); |
| 2505 | psf = state->im->mca_sources; |
| 2506 | } |
| 2507 | out: |
| 2508 | return psf; |
| 2509 | } |
| 2510 | |
| 2511 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) |
| 2512 | { |
| 2513 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); |
| 2514 | if (psf) |
| 2515 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) |
| 2516 | --pos; |
| 2517 | return pos ? NULL : psf; |
| 2518 | } |
| 2519 | |
| 2520 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2521 | __acquires(dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | { |
| 2523 | read_lock(&dev_base_lock); |
| 2524 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 2525 | } |
| 2526 | |
| 2527 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2528 | { |
| 2529 | struct ip6_sf_list *psf; |
| 2530 | if (v == SEQ_START_TOKEN) |
| 2531 | psf = igmp6_mcf_get_first(seq); |
| 2532 | else |
| 2533 | psf = igmp6_mcf_get_next(seq, v); |
| 2534 | ++*pos; |
| 2535 | return psf; |
| 2536 | } |
| 2537 | |
| 2538 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2539 | __releases(dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | { |
| 2541 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2542 | if (likely(state->im != NULL)) { |
| 2543 | spin_unlock_bh(&state->im->mca_lock); |
| 2544 | state->im = NULL; |
| 2545 | } |
| 2546 | if (likely(state->idev != NULL)) { |
| 2547 | read_unlock_bh(&state->idev->lock); |
| 2548 | in6_dev_put(state->idev); |
| 2549 | state->idev = NULL; |
| 2550 | } |
| 2551 | state->dev = NULL; |
| 2552 | read_unlock(&dev_base_lock); |
| 2553 | } |
| 2554 | |
| 2555 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) |
| 2556 | { |
| 2557 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; |
| 2558 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); |
| 2559 | |
| 2560 | if (v == SEQ_START_TOKEN) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 2561 | seq_printf(seq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | "%3s %6s " |
YOSHIFUJI Hideaki | 9343e79 | 2006-01-17 02:10:53 -0800 | [diff] [blame] | 2563 | "%32s %32s %6s %6s\n", "Idx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | "Device", "Multicast Address", |
| 2565 | "Source Address", "INC", "EXC"); |
| 2566 | } else { |
| 2567 | seq_printf(seq, |
YOSHIFUJI Hideaki | 9343e79 | 2006-01-17 02:10:53 -0800 | [diff] [blame] | 2568 | "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | state->dev->ifindex, state->dev->name, |
| 2570 | NIP6(state->im->mca_addr), |
| 2571 | NIP6(psf->sf_addr), |
| 2572 | psf->sf_count[MCAST_INCLUDE], |
| 2573 | psf->sf_count[MCAST_EXCLUDE]); |
| 2574 | } |
| 2575 | return 0; |
| 2576 | } |
| 2577 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2578 | static const struct seq_operations igmp6_mcf_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | .start = igmp6_mcf_seq_start, |
| 2580 | .next = igmp6_mcf_seq_next, |
| 2581 | .stop = igmp6_mcf_seq_stop, |
| 2582 | .show = igmp6_mcf_seq_show, |
| 2583 | }; |
| 2584 | |
| 2585 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) |
| 2586 | { |
Pavel Emelyanov | cf7732e | 2007-10-10 02:29:29 -0700 | [diff] [blame] | 2587 | return seq_open_private(file, &igmp6_mcf_seq_ops, |
| 2588 | sizeof(struct igmp6_mcf_iter_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | } |
| 2590 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2591 | static const struct file_operations igmp6_mcf_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | .owner = THIS_MODULE, |
| 2593 | .open = igmp6_mcf_seq_open, |
| 2594 | .read = seq_read, |
| 2595 | .llseek = seq_lseek, |
| 2596 | .release = seq_release_private, |
| 2597 | }; |
| 2598 | #endif |
| 2599 | |
| 2600 | int __init igmp6_init(struct net_proto_family *ops) |
| 2601 | { |
| 2602 | struct ipv6_pinfo *np; |
| 2603 | struct sock *sk; |
| 2604 | int err; |
| 2605 | |
| 2606 | err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket); |
| 2607 | if (err < 0) { |
| 2608 | printk(KERN_ERR |
| 2609 | "Failed to initialize the IGMP6 control socket (err %d).\n", |
| 2610 | err); |
| 2611 | igmp6_socket = NULL; /* For safety. */ |
| 2612 | return err; |
| 2613 | } |
| 2614 | |
| 2615 | sk = igmp6_socket->sk; |
| 2616 | sk->sk_allocation = GFP_ATOMIC; |
| 2617 | sk->sk_prot->unhash(sk); |
| 2618 | |
| 2619 | np = inet6_sk(sk); |
| 2620 | np->hop_limit = 1; |
| 2621 | |
| 2622 | #ifdef CONFIG_PROC_FS |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 2623 | proc_net_fops_create(&init_net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops); |
| 2624 | proc_net_fops_create(&init_net, "mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | #endif |
| 2626 | |
| 2627 | return 0; |
| 2628 | } |
| 2629 | |
| 2630 | void igmp6_cleanup(void) |
| 2631 | { |
| 2632 | sock_release(igmp6_socket); |
| 2633 | igmp6_socket = NULL; /* for safety */ |
| 2634 | |
| 2635 | #ifdef CONFIG_PROC_FS |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 2636 | proc_net_remove(&init_net, "mcfilter6"); |
| 2637 | proc_net_remove(&init_net, "igmp6"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | #endif |
| 2639 | } |