1191665Sbms/* 2191665Sbms * Copyright (c) 2009 Bruce Simpson. 3191665Sbms * All rights reserved. 4191665Sbms * 5191665Sbms * Redistribution and use in source and binary forms, with or without 6191665Sbms * modification, are permitted provided that the following conditions 7191665Sbms * are met: 8191665Sbms * 1. Redistributions of source code must retain the above copyright 9191665Sbms * notice, this list of conditions and the following disclaimer. 10191665Sbms * 2. Redistributions in binary form must reproduce the above copyright 11191665Sbms * notice, this list of conditions and the following disclaimer in the 12191665Sbms * documentation and/or other materials provided with the distribution. 13191665Sbms * 3. The name of the author may not be used to endorse or promote 14191665Sbms * products derived from this software without specific prior written 15191665Sbms * permission. 16191665Sbms * 17191665Sbms * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18191665Sbms * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19191665Sbms * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20191665Sbms * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21191665Sbms * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22191665Sbms * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23191665Sbms * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24191665Sbms * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25191665Sbms * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26191665Sbms * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27191665Sbms * SUCH DAMAGE. 28191665Sbms */ 29191665Sbms 30191665Sbms/* 31191665Sbms * IPv6 multicast socket, group, and socket option processing module. 32191672Sbms * Normative references: RFC 2292, RFC 3492, RFC 3542, RFC 3678, RFC 3810. 33191665Sbms */ 34191665Sbms 35191665Sbms#include <sys/cdefs.h> 36191665Sbms__FBSDID("$FreeBSD: releng/10.3/sys/netinet6/in6_mcast.c 281911 2015-04-24 02:12:25Z ae $"); 37191665Sbms 38191665Sbms#include "opt_inet6.h" 39191665Sbms 40191665Sbms#include <sys/param.h> 41191665Sbms#include <sys/systm.h> 42191665Sbms#include <sys/kernel.h> 43191665Sbms#include <sys/malloc.h> 44191665Sbms#include <sys/mbuf.h> 45191665Sbms#include <sys/protosw.h> 46191665Sbms#include <sys/socket.h> 47191665Sbms#include <sys/socketvar.h> 48191665Sbms#include <sys/protosw.h> 49191665Sbms#include <sys/sysctl.h> 50191665Sbms#include <sys/priv.h> 51191665Sbms#include <sys/ktr.h> 52191665Sbms#include <sys/tree.h> 53191665Sbms 54191665Sbms#include <net/if.h> 55191665Sbms#include <net/if_dl.h> 56191665Sbms#include <net/route.h> 57191665Sbms#include <net/vnet.h> 58191665Sbms 59191665Sbms#include <netinet/in.h> 60191665Sbms#include <netinet/in_var.h> 61191665Sbms#include <netinet6/in6_var.h> 62191665Sbms#include <netinet/ip6.h> 63191665Sbms#include <netinet/icmp6.h> 64191665Sbms#include <netinet6/ip6_var.h> 65191665Sbms#include <netinet/in_pcb.h> 66191665Sbms#include <netinet/tcp_var.h> 67191665Sbms#include <netinet6/nd6.h> 68191665Sbms#include <netinet6/mld6_var.h> 69195699Srwatson#include <netinet6/scope6_var.h> 70191665Sbms 71191665Sbms#ifndef KTR_MLD 72191665Sbms#define KTR_MLD KTR_INET6 73191665Sbms#endif 74191665Sbms 75191665Sbms#ifndef __SOCKUNION_DECLARED 76191665Sbmsunion sockunion { 77191665Sbms struct sockaddr_storage ss; 78191665Sbms struct sockaddr sa; 79191665Sbms struct sockaddr_dl sdl; 80191665Sbms struct sockaddr_in6 sin6; 81191665Sbms}; 82191665Sbmstypedef union sockunion sockunion_t; 83191665Sbms#define __SOCKUNION_DECLARED 84191665Sbms#endif /* __SOCKUNION_DECLARED */ 85191665Sbms 86191665Sbmsstatic MALLOC_DEFINE(M_IN6MFILTER, "in6_mfilter", 87191665Sbms "IPv6 multicast PCB-layer source filter"); 88191665Sbmsstatic MALLOC_DEFINE(M_IP6MADDR, "in6_multi", "IPv6 multicast group"); 89191665Sbmsstatic MALLOC_DEFINE(M_IP6MOPTS, "ip6_moptions", "IPv6 multicast options"); 90191665Sbmsstatic MALLOC_DEFINE(M_IP6MSOURCE, "ip6_msource", 91191665Sbms "IPv6 multicast MLD-layer source filter"); 92191665Sbms 93191665SbmsRB_GENERATE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp); 94191665Sbms 95191665Sbms/* 96191665Sbms * Locking: 97191665Sbms * - Lock order is: Giant, INP_WLOCK, IN6_MULTI_LOCK, MLD_LOCK, IF_ADDR_LOCK. 98191665Sbms * - The IF_ADDR_LOCK is implicitly taken by in6m_lookup() earlier, however 99191665Sbms * it can be taken by code in net/if.c also. 100191665Sbms * - ip6_moptions and in6_mfilter are covered by the INP_WLOCK. 101191665Sbms * 102191665Sbms * struct in6_multi is covered by IN6_MULTI_LOCK. There isn't strictly 103191665Sbms * any need for in6_multi itself to be virtualized -- it is bound to an ifp 104191665Sbms * anyway no matter what happens. 105191665Sbms */ 106191665Sbmsstruct mtx in6_multi_mtx; 107191665SbmsMTX_SYSINIT(in6_multi_mtx, &in6_multi_mtx, "in6_multi_mtx", MTX_DEF); 108191665Sbms 109191665Sbmsstatic void im6f_commit(struct in6_mfilter *); 110191665Sbmsstatic int im6f_get_source(struct in6_mfilter *imf, 111191665Sbms const struct sockaddr_in6 *psin, 112191665Sbms struct in6_msource **); 113191665Sbmsstatic struct in6_msource * 114191665Sbms im6f_graft(struct in6_mfilter *, const uint8_t, 115191665Sbms const struct sockaddr_in6 *); 116191665Sbmsstatic void im6f_leave(struct in6_mfilter *); 117191665Sbmsstatic int im6f_prune(struct in6_mfilter *, const struct sockaddr_in6 *); 118191665Sbmsstatic void im6f_purge(struct in6_mfilter *); 119191665Sbmsstatic void im6f_rollback(struct in6_mfilter *); 120191665Sbmsstatic void im6f_reap(struct in6_mfilter *); 121191665Sbmsstatic int im6o_grow(struct ip6_moptions *); 122191665Sbmsstatic size_t im6o_match_group(const struct ip6_moptions *, 123191665Sbms const struct ifnet *, const struct sockaddr *); 124191665Sbmsstatic struct in6_msource * 125191665Sbms im6o_match_source(const struct ip6_moptions *, const size_t, 126191665Sbms const struct sockaddr *); 127191665Sbmsstatic void im6s_merge(struct ip6_msource *ims, 128191665Sbms const struct in6_msource *lims, const int rollback); 129191665Sbmsstatic int in6_mc_get(struct ifnet *, const struct in6_addr *, 130191665Sbms struct in6_multi **); 131191665Sbmsstatic int in6m_get_source(struct in6_multi *inm, 132191665Sbms const struct in6_addr *addr, const int noalloc, 133191665Sbms struct ip6_msource **pims); 134259983Sdim#ifdef KTR 135191665Sbmsstatic int in6m_is_ifp_detached(const struct in6_multi *); 136259983Sdim#endif 137191665Sbmsstatic int in6m_merge(struct in6_multi *, /*const*/ struct in6_mfilter *); 138191665Sbmsstatic void in6m_purge(struct in6_multi *); 139191665Sbmsstatic void in6m_reap(struct in6_multi *); 140191665Sbmsstatic struct ip6_moptions * 141191665Sbms in6p_findmoptions(struct inpcb *); 142191665Sbmsstatic int in6p_get_source_filters(struct inpcb *, struct sockopt *); 143191665Sbmsstatic int in6p_join_group(struct inpcb *, struct sockopt *); 144191665Sbmsstatic int in6p_leave_group(struct inpcb *, struct sockopt *); 145191672Sbmsstatic struct ifnet * 146191672Sbms in6p_lookup_mcast_ifp(const struct inpcb *, 147191672Sbms const struct sockaddr_in6 *); 148191665Sbmsstatic int in6p_block_unblock_source(struct inpcb *, struct sockopt *); 149191665Sbmsstatic int in6p_set_multicast_if(struct inpcb *, struct sockopt *); 150191665Sbmsstatic int in6p_set_source_filters(struct inpcb *, struct sockopt *); 151191665Sbmsstatic int sysctl_ip6_mcast_filters(SYSCTL_HANDLER_ARGS); 152191665Sbms 153191665SbmsSYSCTL_DECL(_net_inet6_ip6); /* XXX Not in any common header. */ 154191665Sbms 155227309Sedstatic SYSCTL_NODE(_net_inet6_ip6, OID_AUTO, mcast, CTLFLAG_RW, 0, 156227309Sed "IPv6 multicast"); 157191665Sbms 158191665Sbmsstatic u_long in6_mcast_maxgrpsrc = IPV6_MAX_GROUP_SRC_FILTER; 159191665SbmsSYSCTL_ULONG(_net_inet6_ip6_mcast, OID_AUTO, maxgrpsrc, 160191665Sbms CTLFLAG_RW | CTLFLAG_TUN, &in6_mcast_maxgrpsrc, 0, 161191665Sbms "Max source filters per group"); 162191665SbmsTUNABLE_ULONG("net.inet6.ip6.mcast.maxgrpsrc", &in6_mcast_maxgrpsrc); 163191665Sbms 164191665Sbmsstatic u_long in6_mcast_maxsocksrc = IPV6_MAX_SOCK_SRC_FILTER; 165191665SbmsSYSCTL_ULONG(_net_inet6_ip6_mcast, OID_AUTO, maxsocksrc, 166191665Sbms CTLFLAG_RW | CTLFLAG_TUN, &in6_mcast_maxsocksrc, 0, 167191665Sbms "Max source filters per socket"); 168191665SbmsTUNABLE_ULONG("net.inet6.ip6.mcast.maxsocksrc", &in6_mcast_maxsocksrc); 169191665Sbms 170191665Sbms/* TODO Virtualize this switch. */ 171191665Sbmsint in6_mcast_loop = IPV6_DEFAULT_MULTICAST_LOOP; 172191665SbmsSYSCTL_INT(_net_inet6_ip6_mcast, OID_AUTO, loop, CTLFLAG_RW | CTLFLAG_TUN, 173191665Sbms &in6_mcast_loop, 0, "Loopback multicast datagrams by default"); 174191665SbmsTUNABLE_INT("net.inet6.ip6.mcast.loop", &in6_mcast_loop); 175191665Sbms 176227309Sedstatic SYSCTL_NODE(_net_inet6_ip6_mcast, OID_AUTO, filters, 177191665Sbms CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_ip6_mcast_filters, 178191665Sbms "Per-interface stack-wide source filters"); 179191665Sbms 180259983Sdim#ifdef KTR 181191665Sbms/* 182191665Sbms * Inline function which wraps assertions for a valid ifp. 183191665Sbms * The ifnet layer will set the ifma's ifp pointer to NULL if the ifp 184191665Sbms * is detached. 185191665Sbms */ 186191665Sbmsstatic int __inline 187191665Sbmsin6m_is_ifp_detached(const struct in6_multi *inm) 188191665Sbms{ 189191665Sbms struct ifnet *ifp; 190191665Sbms 191191665Sbms KASSERT(inm->in6m_ifma != NULL, ("%s: no ifma", __func__)); 192191665Sbms ifp = inm->in6m_ifma->ifma_ifp; 193191665Sbms if (ifp != NULL) { 194191665Sbms /* 195191665Sbms * Sanity check that network-layer notion of ifp is the 196191665Sbms * same as that of link-layer. 197191665Sbms */ 198191665Sbms KASSERT(inm->in6m_ifp == ifp, ("%s: bad ifp", __func__)); 199191665Sbms } 200191665Sbms 201191665Sbms return (ifp == NULL); 202191665Sbms} 203259983Sdim#endif 204191665Sbms 205191665Sbms/* 206191665Sbms * Initialize an in6_mfilter structure to a known state at t0, t1 207191665Sbms * with an empty source filter list. 208191665Sbms */ 209191665Sbmsstatic __inline void 210191665Sbmsim6f_init(struct in6_mfilter *imf, const int st0, const int st1) 211191665Sbms{ 212191665Sbms memset(imf, 0, sizeof(struct in6_mfilter)); 213191665Sbms RB_INIT(&imf->im6f_sources); 214191665Sbms imf->im6f_st[0] = st0; 215191665Sbms imf->im6f_st[1] = st1; 216191665Sbms} 217191665Sbms 218191665Sbms/* 219191665Sbms * Resize the ip6_moptions vector to the next power-of-two minus 1. 220191665Sbms * May be called with locks held; do not sleep. 221191665Sbms */ 222191665Sbmsstatic int 223191665Sbmsim6o_grow(struct ip6_moptions *imo) 224191665Sbms{ 225191665Sbms struct in6_multi **nmships; 226191665Sbms struct in6_multi **omships; 227191665Sbms struct in6_mfilter *nmfilters; 228191665Sbms struct in6_mfilter *omfilters; 229191665Sbms size_t idx; 230191665Sbms size_t newmax; 231191665Sbms size_t oldmax; 232191665Sbms 233191665Sbms nmships = NULL; 234191665Sbms nmfilters = NULL; 235191665Sbms omships = imo->im6o_membership; 236191665Sbms omfilters = imo->im6o_mfilters; 237191665Sbms oldmax = imo->im6o_max_memberships; 238191665Sbms newmax = ((oldmax + 1) * 2) - 1; 239191665Sbms 240191665Sbms if (newmax <= IPV6_MAX_MEMBERSHIPS) { 241191665Sbms nmships = (struct in6_multi **)realloc(omships, 242191665Sbms sizeof(struct in6_multi *) * newmax, M_IP6MOPTS, M_NOWAIT); 243191665Sbms nmfilters = (struct in6_mfilter *)realloc(omfilters, 244191665Sbms sizeof(struct in6_mfilter) * newmax, M_IN6MFILTER, 245191665Sbms M_NOWAIT); 246191665Sbms if (nmships != NULL && nmfilters != NULL) { 247191665Sbms /* Initialize newly allocated source filter heads. */ 248191665Sbms for (idx = oldmax; idx < newmax; idx++) { 249191665Sbms im6f_init(&nmfilters[idx], MCAST_UNDEFINED, 250191665Sbms MCAST_EXCLUDE); 251191665Sbms } 252191665Sbms imo->im6o_max_memberships = newmax; 253191665Sbms imo->im6o_membership = nmships; 254191665Sbms imo->im6o_mfilters = nmfilters; 255191665Sbms } 256191665Sbms } 257191665Sbms 258191665Sbms if (nmships == NULL || nmfilters == NULL) { 259191665Sbms if (nmships != NULL) 260191665Sbms free(nmships, M_IP6MOPTS); 261191665Sbms if (nmfilters != NULL) 262191665Sbms free(nmfilters, M_IN6MFILTER); 263191665Sbms return (ETOOMANYREFS); 264191665Sbms } 265191665Sbms 266191665Sbms return (0); 267191665Sbms} 268191665Sbms 269191665Sbms/* 270191665Sbms * Find an IPv6 multicast group entry for this ip6_moptions instance 271191665Sbms * which matches the specified group, and optionally an interface. 272191665Sbms * Return its index into the array, or -1 if not found. 273191665Sbms */ 274191665Sbmsstatic size_t 275191665Sbmsim6o_match_group(const struct ip6_moptions *imo, const struct ifnet *ifp, 276191665Sbms const struct sockaddr *group) 277191665Sbms{ 278191665Sbms const struct sockaddr_in6 *gsin6; 279191665Sbms struct in6_multi **pinm; 280191665Sbms int idx; 281191665Sbms int nmships; 282191665Sbms 283191665Sbms gsin6 = (const struct sockaddr_in6 *)group; 284191665Sbms 285191665Sbms /* The im6o_membership array may be lazy allocated. */ 286191665Sbms if (imo->im6o_membership == NULL || imo->im6o_num_memberships == 0) 287191665Sbms return (-1); 288191665Sbms 289191665Sbms nmships = imo->im6o_num_memberships; 290191665Sbms pinm = &imo->im6o_membership[0]; 291191665Sbms for (idx = 0; idx < nmships; idx++, pinm++) { 292191665Sbms if (*pinm == NULL) 293191665Sbms continue; 294191665Sbms if ((ifp == NULL || ((*pinm)->in6m_ifp == ifp)) && 295191665Sbms IN6_ARE_ADDR_EQUAL(&(*pinm)->in6m_addr, 296191665Sbms &gsin6->sin6_addr)) { 297191665Sbms break; 298191665Sbms } 299191665Sbms } 300191665Sbms if (idx >= nmships) 301191665Sbms idx = -1; 302191665Sbms 303191665Sbms return (idx); 304191665Sbms} 305191665Sbms 306191665Sbms/* 307191665Sbms * Find an IPv6 multicast source entry for this imo which matches 308191665Sbms * the given group index for this socket, and source address. 309191665Sbms * 310192923Sbms * XXX TODO: The scope ID, if present in src, is stripped before 311192923Sbms * any comparison. We SHOULD enforce scope/zone checks where the source 312192923Sbms * filter entry has a link scope. 313192923Sbms * 314191665Sbms * NOTE: This does not check if the entry is in-mode, merely if 315191665Sbms * it exists, which may not be the desired behaviour. 316191665Sbms */ 317191665Sbmsstatic struct in6_msource * 318191665Sbmsim6o_match_source(const struct ip6_moptions *imo, const size_t gidx, 319191665Sbms const struct sockaddr *src) 320191665Sbms{ 321191665Sbms struct ip6_msource find; 322191665Sbms struct in6_mfilter *imf; 323191665Sbms struct ip6_msource *ims; 324191665Sbms const sockunion_t *psa; 325191665Sbms 326191665Sbms KASSERT(src->sa_family == AF_INET6, ("%s: !AF_INET6", __func__)); 327191665Sbms KASSERT(gidx != -1 && gidx < imo->im6o_num_memberships, 328191665Sbms ("%s: invalid index %d\n", __func__, (int)gidx)); 329191665Sbms 330191665Sbms /* The im6o_mfilters array may be lazy allocated. */ 331191665Sbms if (imo->im6o_mfilters == NULL) 332191665Sbms return (NULL); 333191665Sbms imf = &imo->im6o_mfilters[gidx]; 334191665Sbms 335191665Sbms psa = (const sockunion_t *)src; 336191665Sbms find.im6s_addr = psa->sin6.sin6_addr; 337192923Sbms in6_clearscope(&find.im6s_addr); /* XXX */ 338191665Sbms ims = RB_FIND(ip6_msource_tree, &imf->im6f_sources, &find); 339191665Sbms 340191665Sbms return ((struct in6_msource *)ims); 341191665Sbms} 342191665Sbms 343191665Sbms/* 344191665Sbms * Perform filtering for multicast datagrams on a socket by group and source. 345191665Sbms * 346191665Sbms * Returns 0 if a datagram should be allowed through, or various error codes 347191665Sbms * if the socket was not a member of the group, or the source was muted, etc. 348191665Sbms */ 349191665Sbmsint 350191665Sbmsim6o_mc_filter(const struct ip6_moptions *imo, const struct ifnet *ifp, 351191665Sbms const struct sockaddr *group, const struct sockaddr *src) 352191665Sbms{ 353191665Sbms size_t gidx; 354191665Sbms struct in6_msource *ims; 355191665Sbms int mode; 356191665Sbms 357191665Sbms KASSERT(ifp != NULL, ("%s: null ifp", __func__)); 358191665Sbms 359191665Sbms gidx = im6o_match_group(imo, ifp, group); 360191665Sbms if (gidx == -1) 361191665Sbms return (MCAST_NOTGMEMBER); 362191665Sbms 363191665Sbms /* 364191665Sbms * Check if the source was included in an (S,G) join. 365191665Sbms * Allow reception on exclusive memberships by default, 366191665Sbms * reject reception on inclusive memberships by default. 367191665Sbms * Exclude source only if an in-mode exclude filter exists. 368191665Sbms * Include source only if an in-mode include filter exists. 369191665Sbms * NOTE: We are comparing group state here at MLD t1 (now) 370191665Sbms * with socket-layer t0 (since last downcall). 371191665Sbms */ 372191665Sbms mode = imo->im6o_mfilters[gidx].im6f_st[1]; 373191665Sbms ims = im6o_match_source(imo, gidx, src); 374191665Sbms 375191665Sbms if ((ims == NULL && mode == MCAST_INCLUDE) || 376191665Sbms (ims != NULL && ims->im6sl_st[0] != mode)) 377191665Sbms return (MCAST_NOTSMEMBER); 378191665Sbms 379191665Sbms return (MCAST_PASS); 380191665Sbms} 381191665Sbms 382191665Sbms/* 383191665Sbms * Find and return a reference to an in6_multi record for (ifp, group), 384191665Sbms * and bump its reference count. 385191665Sbms * If one does not exist, try to allocate it, and update link-layer multicast 386191665Sbms * filters on ifp to listen for group. 387191665Sbms * Assumes the IN6_MULTI lock is held across the call. 388191665Sbms * Return 0 if successful, otherwise return an appropriate error code. 389191665Sbms */ 390191665Sbmsstatic int 391191665Sbmsin6_mc_get(struct ifnet *ifp, const struct in6_addr *group, 392191665Sbms struct in6_multi **pinm) 393191665Sbms{ 394191665Sbms struct sockaddr_in6 gsin6; 395191665Sbms struct ifmultiaddr *ifma; 396191665Sbms struct in6_multi *inm; 397191665Sbms int error; 398191665Sbms 399191665Sbms error = 0; 400191665Sbms 401191665Sbms /* 402191665Sbms * XXX: Accesses to ifma_protospec must be covered by IF_ADDR_LOCK; 403191665Sbms * if_addmulti() takes this mutex itself, so we must drop and 404191665Sbms * re-acquire around the call. 405191665Sbms */ 406191665Sbms IN6_MULTI_LOCK_ASSERT(); 407229621Sjhb IF_ADDR_WLOCK(ifp); 408191665Sbms 409191665Sbms inm = in6m_lookup_locked(ifp, group); 410191665Sbms if (inm != NULL) { 411191665Sbms /* 412191665Sbms * If we already joined this group, just bump the 413191665Sbms * refcount and return it. 414191665Sbms */ 415191665Sbms KASSERT(inm->in6m_refcount >= 1, 416191665Sbms ("%s: bad refcount %d", __func__, inm->in6m_refcount)); 417191665Sbms ++inm->in6m_refcount; 418191665Sbms *pinm = inm; 419191665Sbms goto out_locked; 420191665Sbms } 421191665Sbms 422191665Sbms memset(&gsin6, 0, sizeof(gsin6)); 423191665Sbms gsin6.sin6_family = AF_INET6; 424191665Sbms gsin6.sin6_len = sizeof(struct sockaddr_in6); 425191665Sbms gsin6.sin6_addr = *group; 426191665Sbms 427191665Sbms /* 428191665Sbms * Check if a link-layer group is already associated 429191665Sbms * with this network-layer group on the given ifnet. 430191665Sbms */ 431229621Sjhb IF_ADDR_WUNLOCK(ifp); 432191665Sbms error = if_addmulti(ifp, (struct sockaddr *)&gsin6, &ifma); 433191665Sbms if (error != 0) 434191665Sbms return (error); 435229621Sjhb IF_ADDR_WLOCK(ifp); 436191665Sbms 437191665Sbms /* 438191665Sbms * If something other than netinet6 is occupying the link-layer 439191665Sbms * group, print a meaningful error message and back out of 440191665Sbms * the allocation. 441191665Sbms * Otherwise, bump the refcount on the existing network-layer 442191665Sbms * group association and return it. 443191665Sbms */ 444191665Sbms if (ifma->ifma_protospec != NULL) { 445191665Sbms inm = (struct in6_multi *)ifma->ifma_protospec; 446191665Sbms#ifdef INVARIANTS 447191665Sbms KASSERT(ifma->ifma_addr != NULL, ("%s: no ifma_addr", 448191665Sbms __func__)); 449191665Sbms KASSERT(ifma->ifma_addr->sa_family == AF_INET6, 450191665Sbms ("%s: ifma not AF_INET6", __func__)); 451191665Sbms KASSERT(inm != NULL, ("%s: no ifma_protospec", __func__)); 452191665Sbms if (inm->in6m_ifma != ifma || inm->in6m_ifp != ifp || 453191665Sbms !IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, group)) 454191665Sbms panic("%s: ifma %p is inconsistent with %p (%p)", 455191665Sbms __func__, ifma, inm, group); 456191665Sbms#endif 457191665Sbms ++inm->in6m_refcount; 458191665Sbms *pinm = inm; 459191665Sbms goto out_locked; 460191665Sbms } 461191665Sbms 462229621Sjhb IF_ADDR_WLOCK_ASSERT(ifp); 463191665Sbms 464191665Sbms /* 465191665Sbms * A new in6_multi record is needed; allocate and initialize it. 466191665Sbms * We DO NOT perform an MLD join as the in6_ layer may need to 467191665Sbms * push an initial source list down to MLD to support SSM. 468191665Sbms * 469191665Sbms * The initial source filter state is INCLUDE, {} as per the RFC. 470191665Sbms * Pending state-changes per group are subject to a bounds check. 471191665Sbms */ 472191665Sbms inm = malloc(sizeof(*inm), M_IP6MADDR, M_NOWAIT | M_ZERO); 473191665Sbms if (inm == NULL) { 474191665Sbms if_delmulti_ifma(ifma); 475191665Sbms error = ENOMEM; 476191665Sbms goto out_locked; 477191665Sbms } 478191665Sbms inm->in6m_addr = *group; 479191665Sbms inm->in6m_ifp = ifp; 480191665Sbms inm->in6m_mli = MLD_IFINFO(ifp); 481191665Sbms inm->in6m_ifma = ifma; 482191665Sbms inm->in6m_refcount = 1; 483191665Sbms inm->in6m_state = MLD_NOT_MEMBER; 484191665Sbms IFQ_SET_MAXLEN(&inm->in6m_scq, MLD_MAX_STATE_CHANGES); 485191665Sbms 486191665Sbms inm->in6m_st[0].iss_fmode = MCAST_UNDEFINED; 487191665Sbms inm->in6m_st[1].iss_fmode = MCAST_UNDEFINED; 488191665Sbms RB_INIT(&inm->in6m_srcs); 489191665Sbms 490191665Sbms ifma->ifma_protospec = inm; 491191665Sbms *pinm = inm; 492191665Sbms 493191665Sbmsout_locked: 494229621Sjhb IF_ADDR_WUNLOCK(ifp); 495191665Sbms return (error); 496191665Sbms} 497191665Sbms 498191665Sbms/* 499191665Sbms * Drop a reference to an in6_multi record. 500191665Sbms * 501191665Sbms * If the refcount drops to 0, free the in6_multi record and 502191665Sbms * delete the underlying link-layer membership. 503191665Sbms */ 504191665Sbmsvoid 505191665Sbmsin6m_release_locked(struct in6_multi *inm) 506191665Sbms{ 507191665Sbms struct ifmultiaddr *ifma; 508191665Sbms 509191665Sbms IN6_MULTI_LOCK_ASSERT(); 510191665Sbms 511191665Sbms CTR2(KTR_MLD, "%s: refcount is %d", __func__, inm->in6m_refcount); 512191665Sbms 513191665Sbms if (--inm->in6m_refcount > 0) { 514191665Sbms CTR2(KTR_MLD, "%s: refcount is now %d", __func__, 515191665Sbms inm->in6m_refcount); 516191665Sbms return; 517191665Sbms } 518191665Sbms 519191665Sbms CTR2(KTR_MLD, "%s: freeing inm %p", __func__, inm); 520191665Sbms 521191665Sbms ifma = inm->in6m_ifma; 522191665Sbms 523191665Sbms /* XXX this access is not covered by IF_ADDR_LOCK */ 524191665Sbms CTR2(KTR_MLD, "%s: purging ifma %p", __func__, ifma); 525191665Sbms KASSERT(ifma->ifma_protospec == inm, 526191665Sbms ("%s: ifma_protospec != inm", __func__)); 527191665Sbms ifma->ifma_protospec = NULL; 528191665Sbms 529191665Sbms in6m_purge(inm); 530191665Sbms 531191665Sbms free(inm, M_IP6MADDR); 532191665Sbms 533191665Sbms if_delmulti_ifma(ifma); 534191665Sbms} 535191665Sbms 536191665Sbms/* 537191665Sbms * Clear recorded source entries for a group. 538191665Sbms * Used by the MLD code. Caller must hold the IN6_MULTI lock. 539191665Sbms * FIXME: Should reap. 540191665Sbms */ 541191665Sbmsvoid 542191665Sbmsin6m_clear_recorded(struct in6_multi *inm) 543191665Sbms{ 544191665Sbms struct ip6_msource *ims; 545191665Sbms 546191665Sbms IN6_MULTI_LOCK_ASSERT(); 547191665Sbms 548191665Sbms RB_FOREACH(ims, ip6_msource_tree, &inm->in6m_srcs) { 549191665Sbms if (ims->im6s_stp) { 550191665Sbms ims->im6s_stp = 0; 551191665Sbms --inm->in6m_st[1].iss_rec; 552191665Sbms } 553191665Sbms } 554191665Sbms KASSERT(inm->in6m_st[1].iss_rec == 0, 555191665Sbms ("%s: iss_rec %d not 0", __func__, inm->in6m_st[1].iss_rec)); 556191665Sbms} 557191665Sbms 558191665Sbms/* 559191665Sbms * Record a source as pending for a Source-Group MLDv2 query. 560191665Sbms * This lives here as it modifies the shared tree. 561191665Sbms * 562191665Sbms * inm is the group descriptor. 563191665Sbms * naddr is the address of the source to record in network-byte order. 564191665Sbms * 565191665Sbms * If the net.inet6.mld.sgalloc sysctl is non-zero, we will 566191665Sbms * lazy-allocate a source node in response to an SG query. 567191665Sbms * Otherwise, no allocation is performed. This saves some memory 568191665Sbms * with the trade-off that the source will not be reported to the 569191665Sbms * router if joined in the window between the query response and 570191665Sbms * the group actually being joined on the local host. 571191665Sbms * 572191665Sbms * VIMAGE: XXX: Currently the mld_sgalloc feature has been removed. 573191665Sbms * This turns off the allocation of a recorded source entry if 574191665Sbms * the group has not been joined. 575191665Sbms * 576191665Sbms * Return 0 if the source didn't exist or was already marked as recorded. 577191665Sbms * Return 1 if the source was marked as recorded by this function. 578191665Sbms * Return <0 if any error occured (negated errno code). 579191665Sbms */ 580191665Sbmsint 581191665Sbmsin6m_record_source(struct in6_multi *inm, const struct in6_addr *addr) 582191665Sbms{ 583191665Sbms struct ip6_msource find; 584191665Sbms struct ip6_msource *ims, *nims; 585191665Sbms 586191665Sbms IN6_MULTI_LOCK_ASSERT(); 587191665Sbms 588191665Sbms find.im6s_addr = *addr; 589191665Sbms ims = RB_FIND(ip6_msource_tree, &inm->in6m_srcs, &find); 590191665Sbms if (ims && ims->im6s_stp) 591191665Sbms return (0); 592191665Sbms if (ims == NULL) { 593191665Sbms if (inm->in6m_nsrc == in6_mcast_maxgrpsrc) 594191665Sbms return (-ENOSPC); 595191665Sbms nims = malloc(sizeof(struct ip6_msource), M_IP6MSOURCE, 596191665Sbms M_NOWAIT | M_ZERO); 597191665Sbms if (nims == NULL) 598191665Sbms return (-ENOMEM); 599191665Sbms nims->im6s_addr = find.im6s_addr; 600191665Sbms RB_INSERT(ip6_msource_tree, &inm->in6m_srcs, nims); 601191665Sbms ++inm->in6m_nsrc; 602191665Sbms ims = nims; 603191665Sbms } 604191665Sbms 605191665Sbms /* 606191665Sbms * Mark the source as recorded and update the recorded 607191665Sbms * source count. 608191665Sbms */ 609191665Sbms ++ims->im6s_stp; 610191665Sbms ++inm->in6m_st[1].iss_rec; 611191665Sbms 612191665Sbms return (1); 613191665Sbms} 614191665Sbms 615191665Sbms/* 616191665Sbms * Return a pointer to an in6_msource owned by an in6_mfilter, 617191665Sbms * given its source address. 618191665Sbms * Lazy-allocate if needed. If this is a new entry its filter state is 619191665Sbms * undefined at t0. 620191665Sbms * 621191665Sbms * imf is the filter set being modified. 622191665Sbms * addr is the source address. 623191665Sbms * 624191665Sbms * SMPng: May be called with locks held; malloc must not block. 625191665Sbms */ 626191665Sbmsstatic int 627191665Sbmsim6f_get_source(struct in6_mfilter *imf, const struct sockaddr_in6 *psin, 628191665Sbms struct in6_msource **plims) 629191665Sbms{ 630191665Sbms struct ip6_msource find; 631191665Sbms struct ip6_msource *ims, *nims; 632191665Sbms struct in6_msource *lims; 633191665Sbms int error; 634191665Sbms 635191665Sbms error = 0; 636191665Sbms ims = NULL; 637191665Sbms lims = NULL; 638191665Sbms 639191665Sbms find.im6s_addr = psin->sin6_addr; 640191665Sbms ims = RB_FIND(ip6_msource_tree, &imf->im6f_sources, &find); 641191665Sbms lims = (struct in6_msource *)ims; 642191665Sbms if (lims == NULL) { 643191665Sbms if (imf->im6f_nsrc == in6_mcast_maxsocksrc) 644191665Sbms return (ENOSPC); 645191665Sbms nims = malloc(sizeof(struct in6_msource), M_IN6MFILTER, 646191665Sbms M_NOWAIT | M_ZERO); 647191665Sbms if (nims == NULL) 648191665Sbms return (ENOMEM); 649191665Sbms lims = (struct in6_msource *)nims; 650191665Sbms lims->im6s_addr = find.im6s_addr; 651191665Sbms lims->im6sl_st[0] = MCAST_UNDEFINED; 652191665Sbms RB_INSERT(ip6_msource_tree, &imf->im6f_sources, nims); 653191665Sbms ++imf->im6f_nsrc; 654191665Sbms } 655191665Sbms 656191665Sbms *plims = lims; 657191665Sbms 658191665Sbms return (error); 659191665Sbms} 660191665Sbms 661191665Sbms/* 662191665Sbms * Graft a source entry into an existing socket-layer filter set, 663191665Sbms * maintaining any required invariants and checking allocations. 664191665Sbms * 665191665Sbms * The source is marked as being in the new filter mode at t1. 666191665Sbms * 667191665Sbms * Return the pointer to the new node, otherwise return NULL. 668191665Sbms */ 669191665Sbmsstatic struct in6_msource * 670191665Sbmsim6f_graft(struct in6_mfilter *imf, const uint8_t st1, 671191665Sbms const struct sockaddr_in6 *psin) 672191665Sbms{ 673191665Sbms struct ip6_msource *nims; 674191665Sbms struct in6_msource *lims; 675191665Sbms 676191665Sbms nims = malloc(sizeof(struct in6_msource), M_IN6MFILTER, 677191665Sbms M_NOWAIT | M_ZERO); 678191665Sbms if (nims == NULL) 679191665Sbms return (NULL); 680191665Sbms lims = (struct in6_msource *)nims; 681191665Sbms lims->im6s_addr = psin->sin6_addr; 682191665Sbms lims->im6sl_st[0] = MCAST_UNDEFINED; 683191665Sbms lims->im6sl_st[1] = st1; 684191665Sbms RB_INSERT(ip6_msource_tree, &imf->im6f_sources, nims); 685191665Sbms ++imf->im6f_nsrc; 686191665Sbms 687191665Sbms return (lims); 688191665Sbms} 689191665Sbms 690191665Sbms/* 691191665Sbms * Prune a source entry from an existing socket-layer filter set, 692191665Sbms * maintaining any required invariants and checking allocations. 693191665Sbms * 694191665Sbms * The source is marked as being left at t1, it is not freed. 695191665Sbms * 696191665Sbms * Return 0 if no error occurred, otherwise return an errno value. 697191665Sbms */ 698191665Sbmsstatic int 699191665Sbmsim6f_prune(struct in6_mfilter *imf, const struct sockaddr_in6 *psin) 700191665Sbms{ 701191665Sbms struct ip6_msource find; 702191665Sbms struct ip6_msource *ims; 703191665Sbms struct in6_msource *lims; 704191665Sbms 705191665Sbms find.im6s_addr = psin->sin6_addr; 706191665Sbms ims = RB_FIND(ip6_msource_tree, &imf->im6f_sources, &find); 707191665Sbms if (ims == NULL) 708191665Sbms return (ENOENT); 709191665Sbms lims = (struct in6_msource *)ims; 710191665Sbms lims->im6sl_st[1] = MCAST_UNDEFINED; 711191665Sbms return (0); 712191665Sbms} 713191665Sbms 714191665Sbms/* 715191665Sbms * Revert socket-layer filter set deltas at t1 to t0 state. 716191665Sbms */ 717191665Sbmsstatic void 718191665Sbmsim6f_rollback(struct in6_mfilter *imf) 719191665Sbms{ 720191665Sbms struct ip6_msource *ims, *tims; 721191665Sbms struct in6_msource *lims; 722191665Sbms 723191665Sbms RB_FOREACH_SAFE(ims, ip6_msource_tree, &imf->im6f_sources, tims) { 724191665Sbms lims = (struct in6_msource *)ims; 725191665Sbms if (lims->im6sl_st[0] == lims->im6sl_st[1]) { 726191665Sbms /* no change at t1 */ 727191665Sbms continue; 728191665Sbms } else if (lims->im6sl_st[0] != MCAST_UNDEFINED) { 729191665Sbms /* revert change to existing source at t1 */ 730191665Sbms lims->im6sl_st[1] = lims->im6sl_st[0]; 731191665Sbms } else { 732191665Sbms /* revert source added t1 */ 733191665Sbms CTR2(KTR_MLD, "%s: free ims %p", __func__, ims); 734191665Sbms RB_REMOVE(ip6_msource_tree, &imf->im6f_sources, ims); 735191665Sbms free(ims, M_IN6MFILTER); 736191665Sbms imf->im6f_nsrc--; 737191665Sbms } 738191665Sbms } 739191665Sbms imf->im6f_st[1] = imf->im6f_st[0]; 740191665Sbms} 741191665Sbms 742191665Sbms/* 743191665Sbms * Mark socket-layer filter set as INCLUDE {} at t1. 744191665Sbms */ 745191665Sbmsstatic void 746191665Sbmsim6f_leave(struct in6_mfilter *imf) 747191665Sbms{ 748191665Sbms struct ip6_msource *ims; 749191665Sbms struct in6_msource *lims; 750191665Sbms 751191665Sbms RB_FOREACH(ims, ip6_msource_tree, &imf->im6f_sources) { 752191665Sbms lims = (struct in6_msource *)ims; 753191665Sbms lims->im6sl_st[1] = MCAST_UNDEFINED; 754191665Sbms } 755191665Sbms imf->im6f_st[1] = MCAST_INCLUDE; 756191665Sbms} 757191665Sbms 758191665Sbms/* 759191665Sbms * Mark socket-layer filter set deltas as committed. 760191665Sbms */ 761191665Sbmsstatic void 762191665Sbmsim6f_commit(struct in6_mfilter *imf) 763191665Sbms{ 764191665Sbms struct ip6_msource *ims; 765191665Sbms struct in6_msource *lims; 766191665Sbms 767191665Sbms RB_FOREACH(ims, ip6_msource_tree, &imf->im6f_sources) { 768191665Sbms lims = (struct in6_msource *)ims; 769191665Sbms lims->im6sl_st[0] = lims->im6sl_st[1]; 770191665Sbms } 771191665Sbms imf->im6f_st[0] = imf->im6f_st[1]; 772191665Sbms} 773191665Sbms 774191665Sbms/* 775191665Sbms * Reap unreferenced sources from socket-layer filter set. 776191665Sbms */ 777191665Sbmsstatic void 778191665Sbmsim6f_reap(struct in6_mfilter *imf) 779191665Sbms{ 780191665Sbms struct ip6_msource *ims, *tims; 781191665Sbms struct in6_msource *lims; 782191665Sbms 783191665Sbms RB_FOREACH_SAFE(ims, ip6_msource_tree, &imf->im6f_sources, tims) { 784191665Sbms lims = (struct in6_msource *)ims; 785191665Sbms if ((lims->im6sl_st[0] == MCAST_UNDEFINED) && 786191665Sbms (lims->im6sl_st[1] == MCAST_UNDEFINED)) { 787191665Sbms CTR2(KTR_MLD, "%s: free lims %p", __func__, ims); 788191665Sbms RB_REMOVE(ip6_msource_tree, &imf->im6f_sources, ims); 789191665Sbms free(ims, M_IN6MFILTER); 790191665Sbms imf->im6f_nsrc--; 791191665Sbms } 792191665Sbms } 793191665Sbms} 794191665Sbms 795191665Sbms/* 796191665Sbms * Purge socket-layer filter set. 797191665Sbms */ 798191665Sbmsstatic void 799191665Sbmsim6f_purge(struct in6_mfilter *imf) 800191665Sbms{ 801191665Sbms struct ip6_msource *ims, *tims; 802191665Sbms 803191665Sbms RB_FOREACH_SAFE(ims, ip6_msource_tree, &imf->im6f_sources, tims) { 804191665Sbms CTR2(KTR_MLD, "%s: free ims %p", __func__, ims); 805191665Sbms RB_REMOVE(ip6_msource_tree, &imf->im6f_sources, ims); 806191665Sbms free(ims, M_IN6MFILTER); 807191665Sbms imf->im6f_nsrc--; 808191665Sbms } 809191665Sbms imf->im6f_st[0] = imf->im6f_st[1] = MCAST_UNDEFINED; 810191665Sbms KASSERT(RB_EMPTY(&imf->im6f_sources), 811191665Sbms ("%s: im6f_sources not empty", __func__)); 812191665Sbms} 813191665Sbms 814191665Sbms/* 815191665Sbms * Look up a source filter entry for a multicast group. 816191665Sbms * 817191665Sbms * inm is the group descriptor to work with. 818191665Sbms * addr is the IPv6 address to look up. 819191665Sbms * noalloc may be non-zero to suppress allocation of sources. 820191665Sbms * *pims will be set to the address of the retrieved or allocated source. 821191665Sbms * 822191665Sbms * SMPng: NOTE: may be called with locks held. 823191665Sbms * Return 0 if successful, otherwise return a non-zero error code. 824191665Sbms */ 825191665Sbmsstatic int 826191665Sbmsin6m_get_source(struct in6_multi *inm, const struct in6_addr *addr, 827191665Sbms const int noalloc, struct ip6_msource **pims) 828191665Sbms{ 829191665Sbms struct ip6_msource find; 830191665Sbms struct ip6_msource *ims, *nims; 831191665Sbms#ifdef KTR 832191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 833191665Sbms#endif 834191665Sbms 835191665Sbms find.im6s_addr = *addr; 836191665Sbms ims = RB_FIND(ip6_msource_tree, &inm->in6m_srcs, &find); 837191665Sbms if (ims == NULL && !noalloc) { 838191665Sbms if (inm->in6m_nsrc == in6_mcast_maxgrpsrc) 839191665Sbms return (ENOSPC); 840191665Sbms nims = malloc(sizeof(struct ip6_msource), M_IP6MSOURCE, 841191665Sbms M_NOWAIT | M_ZERO); 842191665Sbms if (nims == NULL) 843191665Sbms return (ENOMEM); 844191665Sbms nims->im6s_addr = *addr; 845191665Sbms RB_INSERT(ip6_msource_tree, &inm->in6m_srcs, nims); 846191665Sbms ++inm->in6m_nsrc; 847191665Sbms ims = nims; 848191665Sbms CTR3(KTR_MLD, "%s: allocated %s as %p", __func__, 849191665Sbms ip6_sprintf(ip6tbuf, addr), ims); 850191665Sbms } 851191665Sbms 852191665Sbms *pims = ims; 853191665Sbms return (0); 854191665Sbms} 855191665Sbms 856191665Sbms/* 857191665Sbms * Merge socket-layer source into MLD-layer source. 858191665Sbms * If rollback is non-zero, perform the inverse of the merge. 859191665Sbms */ 860191665Sbmsstatic void 861191665Sbmsim6s_merge(struct ip6_msource *ims, const struct in6_msource *lims, 862191665Sbms const int rollback) 863191665Sbms{ 864191665Sbms int n = rollback ? -1 : 1; 865191665Sbms#ifdef KTR 866191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 867191665Sbms 868191665Sbms ip6_sprintf(ip6tbuf, &lims->im6s_addr); 869191665Sbms#endif 870191665Sbms 871191665Sbms if (lims->im6sl_st[0] == MCAST_EXCLUDE) { 872191665Sbms CTR3(KTR_MLD, "%s: t1 ex -= %d on %s", __func__, n, ip6tbuf); 873191665Sbms ims->im6s_st[1].ex -= n; 874191665Sbms } else if (lims->im6sl_st[0] == MCAST_INCLUDE) { 875191665Sbms CTR3(KTR_MLD, "%s: t1 in -= %d on %s", __func__, n, ip6tbuf); 876191665Sbms ims->im6s_st[1].in -= n; 877191665Sbms } 878191665Sbms 879191665Sbms if (lims->im6sl_st[1] == MCAST_EXCLUDE) { 880191665Sbms CTR3(KTR_MLD, "%s: t1 ex += %d on %s", __func__, n, ip6tbuf); 881191665Sbms ims->im6s_st[1].ex += n; 882191665Sbms } else if (lims->im6sl_st[1] == MCAST_INCLUDE) { 883191665Sbms CTR3(KTR_MLD, "%s: t1 in += %d on %s", __func__, n, ip6tbuf); 884191665Sbms ims->im6s_st[1].in += n; 885191665Sbms } 886191665Sbms} 887191665Sbms 888191665Sbms/* 889191665Sbms * Atomically update the global in6_multi state, when a membership's 890191665Sbms * filter list is being updated in any way. 891191665Sbms * 892191665Sbms * imf is the per-inpcb-membership group filter pointer. 893191665Sbms * A fake imf may be passed for in-kernel consumers. 894191665Sbms * 895191665Sbms * XXX This is a candidate for a set-symmetric-difference style loop 896191665Sbms * which would eliminate the repeated lookup from root of ims nodes, 897191665Sbms * as they share the same key space. 898191665Sbms * 899191665Sbms * If any error occurred this function will back out of refcounts 900191665Sbms * and return a non-zero value. 901191665Sbms */ 902191665Sbmsstatic int 903191665Sbmsin6m_merge(struct in6_multi *inm, /*const*/ struct in6_mfilter *imf) 904191665Sbms{ 905191665Sbms struct ip6_msource *ims, *nims; 906191665Sbms struct in6_msource *lims; 907191665Sbms int schanged, error; 908191665Sbms int nsrc0, nsrc1; 909191665Sbms 910191665Sbms schanged = 0; 911191665Sbms error = 0; 912191665Sbms nsrc1 = nsrc0 = 0; 913191665Sbms 914191665Sbms /* 915191665Sbms * Update the source filters first, as this may fail. 916191665Sbms * Maintain count of in-mode filters at t0, t1. These are 917191665Sbms * used to work out if we transition into ASM mode or not. 918191665Sbms * Maintain a count of source filters whose state was 919191665Sbms * actually modified by this operation. 920191665Sbms */ 921191665Sbms RB_FOREACH(ims, ip6_msource_tree, &imf->im6f_sources) { 922191665Sbms lims = (struct in6_msource *)ims; 923191665Sbms if (lims->im6sl_st[0] == imf->im6f_st[0]) nsrc0++; 924191665Sbms if (lims->im6sl_st[1] == imf->im6f_st[1]) nsrc1++; 925191665Sbms if (lims->im6sl_st[0] == lims->im6sl_st[1]) continue; 926191665Sbms error = in6m_get_source(inm, &lims->im6s_addr, 0, &nims); 927191665Sbms ++schanged; 928191665Sbms if (error) 929191665Sbms break; 930191665Sbms im6s_merge(nims, lims, 0); 931191665Sbms } 932191665Sbms if (error) { 933191665Sbms struct ip6_msource *bims; 934191665Sbms 935191665Sbms RB_FOREACH_REVERSE_FROM(ims, ip6_msource_tree, nims) { 936191665Sbms lims = (struct in6_msource *)ims; 937191665Sbms if (lims->im6sl_st[0] == lims->im6sl_st[1]) 938191665Sbms continue; 939191665Sbms (void)in6m_get_source(inm, &lims->im6s_addr, 1, &bims); 940191665Sbms if (bims == NULL) 941191665Sbms continue; 942191665Sbms im6s_merge(bims, lims, 1); 943191665Sbms } 944191665Sbms goto out_reap; 945191665Sbms } 946191665Sbms 947191665Sbms CTR3(KTR_MLD, "%s: imf filters in-mode: %d at t0, %d at t1", 948191665Sbms __func__, nsrc0, nsrc1); 949191665Sbms 950191665Sbms /* Handle transition between INCLUDE {n} and INCLUDE {} on socket. */ 951191665Sbms if (imf->im6f_st[0] == imf->im6f_st[1] && 952191665Sbms imf->im6f_st[1] == MCAST_INCLUDE) { 953191665Sbms if (nsrc1 == 0) { 954191665Sbms CTR1(KTR_MLD, "%s: --in on inm at t1", __func__); 955191665Sbms --inm->in6m_st[1].iss_in; 956191665Sbms } 957191665Sbms } 958191665Sbms 959191665Sbms /* Handle filter mode transition on socket. */ 960191665Sbms if (imf->im6f_st[0] != imf->im6f_st[1]) { 961191665Sbms CTR3(KTR_MLD, "%s: imf transition %d to %d", 962191665Sbms __func__, imf->im6f_st[0], imf->im6f_st[1]); 963191665Sbms 964191665Sbms if (imf->im6f_st[0] == MCAST_EXCLUDE) { 965191665Sbms CTR1(KTR_MLD, "%s: --ex on inm at t1", __func__); 966191665Sbms --inm->in6m_st[1].iss_ex; 967191665Sbms } else if (imf->im6f_st[0] == MCAST_INCLUDE) { 968191665Sbms CTR1(KTR_MLD, "%s: --in on inm at t1", __func__); 969191665Sbms --inm->in6m_st[1].iss_in; 970191665Sbms } 971191665Sbms 972191665Sbms if (imf->im6f_st[1] == MCAST_EXCLUDE) { 973191665Sbms CTR1(KTR_MLD, "%s: ex++ on inm at t1", __func__); 974191665Sbms inm->in6m_st[1].iss_ex++; 975191665Sbms } else if (imf->im6f_st[1] == MCAST_INCLUDE && nsrc1 > 0) { 976191665Sbms CTR1(KTR_MLD, "%s: in++ on inm at t1", __func__); 977191665Sbms inm->in6m_st[1].iss_in++; 978191665Sbms } 979191665Sbms } 980191665Sbms 981191665Sbms /* 982191665Sbms * Track inm filter state in terms of listener counts. 983191665Sbms * If there are any exclusive listeners, stack-wide 984191665Sbms * membership is exclusive. 985191665Sbms * Otherwise, if only inclusive listeners, stack-wide is inclusive. 986191665Sbms * If no listeners remain, state is undefined at t1, 987191665Sbms * and the MLD lifecycle for this group should finish. 988191665Sbms */ 989191665Sbms if (inm->in6m_st[1].iss_ex > 0) { 990191665Sbms CTR1(KTR_MLD, "%s: transition to EX", __func__); 991191665Sbms inm->in6m_st[1].iss_fmode = MCAST_EXCLUDE; 992191665Sbms } else if (inm->in6m_st[1].iss_in > 0) { 993191665Sbms CTR1(KTR_MLD, "%s: transition to IN", __func__); 994191665Sbms inm->in6m_st[1].iss_fmode = MCAST_INCLUDE; 995191665Sbms } else { 996191665Sbms CTR1(KTR_MLD, "%s: transition to UNDEF", __func__); 997191665Sbms inm->in6m_st[1].iss_fmode = MCAST_UNDEFINED; 998191665Sbms } 999191665Sbms 1000191665Sbms /* Decrement ASM listener count on transition out of ASM mode. */ 1001191665Sbms if (imf->im6f_st[0] == MCAST_EXCLUDE && nsrc0 == 0) { 1002191665Sbms if ((imf->im6f_st[1] != MCAST_EXCLUDE) || 1003191665Sbms (imf->im6f_st[1] == MCAST_EXCLUDE && nsrc1 > 0)) 1004191665Sbms CTR1(KTR_MLD, "%s: --asm on inm at t1", __func__); 1005191665Sbms --inm->in6m_st[1].iss_asm; 1006191665Sbms } 1007191665Sbms 1008191665Sbms /* Increment ASM listener count on transition to ASM mode. */ 1009191665Sbms if (imf->im6f_st[1] == MCAST_EXCLUDE && nsrc1 == 0) { 1010191665Sbms CTR1(KTR_MLD, "%s: asm++ on inm at t1", __func__); 1011191665Sbms inm->in6m_st[1].iss_asm++; 1012191665Sbms } 1013191665Sbms 1014191665Sbms CTR3(KTR_MLD, "%s: merged imf %p to inm %p", __func__, imf, inm); 1015191665Sbms in6m_print(inm); 1016191665Sbms 1017191665Sbmsout_reap: 1018191665Sbms if (schanged > 0) { 1019191665Sbms CTR1(KTR_MLD, "%s: sources changed; reaping", __func__); 1020191665Sbms in6m_reap(inm); 1021191665Sbms } 1022191665Sbms return (error); 1023191665Sbms} 1024191665Sbms 1025191665Sbms/* 1026191665Sbms * Mark an in6_multi's filter set deltas as committed. 1027191665Sbms * Called by MLD after a state change has been enqueued. 1028191665Sbms */ 1029191665Sbmsvoid 1030191665Sbmsin6m_commit(struct in6_multi *inm) 1031191665Sbms{ 1032191665Sbms struct ip6_msource *ims; 1033191665Sbms 1034191665Sbms CTR2(KTR_MLD, "%s: commit inm %p", __func__, inm); 1035191665Sbms CTR1(KTR_MLD, "%s: pre commit:", __func__); 1036191665Sbms in6m_print(inm); 1037191665Sbms 1038191665Sbms RB_FOREACH(ims, ip6_msource_tree, &inm->in6m_srcs) { 1039191665Sbms ims->im6s_st[0] = ims->im6s_st[1]; 1040191665Sbms } 1041191665Sbms inm->in6m_st[0] = inm->in6m_st[1]; 1042191665Sbms} 1043191665Sbms 1044191665Sbms/* 1045191665Sbms * Reap unreferenced nodes from an in6_multi's filter set. 1046191665Sbms */ 1047191665Sbmsstatic void 1048191665Sbmsin6m_reap(struct in6_multi *inm) 1049191665Sbms{ 1050191665Sbms struct ip6_msource *ims, *tims; 1051191665Sbms 1052191665Sbms RB_FOREACH_SAFE(ims, ip6_msource_tree, &inm->in6m_srcs, tims) { 1053191665Sbms if (ims->im6s_st[0].ex > 0 || ims->im6s_st[0].in > 0 || 1054191665Sbms ims->im6s_st[1].ex > 0 || ims->im6s_st[1].in > 0 || 1055191665Sbms ims->im6s_stp != 0) 1056191665Sbms continue; 1057191665Sbms CTR2(KTR_MLD, "%s: free ims %p", __func__, ims); 1058191665Sbms RB_REMOVE(ip6_msource_tree, &inm->in6m_srcs, ims); 1059191665Sbms free(ims, M_IP6MSOURCE); 1060191665Sbms inm->in6m_nsrc--; 1061191665Sbms } 1062191665Sbms} 1063191665Sbms 1064191665Sbms/* 1065191665Sbms * Purge all source nodes from an in6_multi's filter set. 1066191665Sbms */ 1067191665Sbmsstatic void 1068191665Sbmsin6m_purge(struct in6_multi *inm) 1069191665Sbms{ 1070191665Sbms struct ip6_msource *ims, *tims; 1071191665Sbms 1072191665Sbms RB_FOREACH_SAFE(ims, ip6_msource_tree, &inm->in6m_srcs, tims) { 1073191665Sbms CTR2(KTR_MLD, "%s: free ims %p", __func__, ims); 1074191665Sbms RB_REMOVE(ip6_msource_tree, &inm->in6m_srcs, ims); 1075191665Sbms free(ims, M_IP6MSOURCE); 1076191665Sbms inm->in6m_nsrc--; 1077191665Sbms } 1078274168Sae /* Free state-change requests that might be queued. */ 1079274168Sae _IF_DRAIN(&inm->in6m_scq); 1080191665Sbms} 1081191665Sbms 1082191665Sbms/* 1083191665Sbms * Join a multicast address w/o sources. 1084191665Sbms * KAME compatibility entry point. 1085191665Sbms * 1086191665Sbms * SMPng: Assume no mc locks held by caller. 1087191665Sbms */ 1088191665Sbmsstruct in6_multi_mship * 1089191665Sbmsin6_joingroup(struct ifnet *ifp, struct in6_addr *mcaddr, 1090191665Sbms int *errorp, int delay) 1091191665Sbms{ 1092191665Sbms struct in6_multi_mship *imm; 1093191665Sbms int error; 1094191665Sbms 1095191665Sbms imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT); 1096191665Sbms if (imm == NULL) { 1097191665Sbms *errorp = ENOBUFS; 1098191665Sbms return (NULL); 1099191665Sbms } 1100191665Sbms 1101191665Sbms delay = (delay * PR_FASTHZ) / hz; 1102191665Sbms 1103191665Sbms error = in6_mc_join(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay); 1104191665Sbms if (error) { 1105191665Sbms *errorp = error; 1106191665Sbms free(imm, M_IP6MADDR); 1107191665Sbms return (NULL); 1108191665Sbms } 1109191665Sbms 1110191665Sbms return (imm); 1111191665Sbms} 1112191665Sbms 1113191665Sbms/* 1114191665Sbms * Leave a multicast address w/o sources. 1115191665Sbms * KAME compatibility entry point. 1116191665Sbms * 1117191665Sbms * SMPng: Assume no mc locks held by caller. 1118191665Sbms */ 1119191665Sbmsint 1120191665Sbmsin6_leavegroup(struct in6_multi_mship *imm) 1121191665Sbms{ 1122191665Sbms 1123191665Sbms if (imm->i6mm_maddr != NULL) 1124191665Sbms in6_mc_leave(imm->i6mm_maddr, NULL); 1125191665Sbms free(imm, M_IP6MADDR); 1126191665Sbms return 0; 1127191665Sbms} 1128191665Sbms 1129191665Sbms/* 1130191665Sbms * Join a multicast group; unlocked entry point. 1131191665Sbms * 1132191665Sbms * SMPng: XXX: in6_mc_join() is called from in6_control() when upper 1133191665Sbms * locks are not held. Fortunately, ifp is unlikely to have been detached 1134191665Sbms * at this point, so we assume it's OK to recurse. 1135191665Sbms */ 1136191665Sbmsint 1137191665Sbmsin6_mc_join(struct ifnet *ifp, const struct in6_addr *mcaddr, 1138191665Sbms /*const*/ struct in6_mfilter *imf, struct in6_multi **pinm, 1139191665Sbms const int delay) 1140191665Sbms{ 1141191665Sbms int error; 1142191665Sbms 1143191665Sbms IN6_MULTI_LOCK(); 1144191665Sbms error = in6_mc_join_locked(ifp, mcaddr, imf, pinm, delay); 1145191665Sbms IN6_MULTI_UNLOCK(); 1146191665Sbms 1147191665Sbms return (error); 1148191665Sbms} 1149191665Sbms 1150191665Sbms/* 1151191665Sbms * Join a multicast group; real entry point. 1152191665Sbms * 1153191665Sbms * Only preserves atomicity at inm level. 1154191665Sbms * NOTE: imf argument cannot be const due to sys/tree.h limitations. 1155191665Sbms * 1156191665Sbms * If the MLD downcall fails, the group is not joined, and an error 1157191665Sbms * code is returned. 1158191665Sbms */ 1159191665Sbmsint 1160191665Sbmsin6_mc_join_locked(struct ifnet *ifp, const struct in6_addr *mcaddr, 1161191665Sbms /*const*/ struct in6_mfilter *imf, struct in6_multi **pinm, 1162191665Sbms const int delay) 1163191665Sbms{ 1164191665Sbms struct in6_mfilter timf; 1165191665Sbms struct in6_multi *inm; 1166191665Sbms int error; 1167191665Sbms#ifdef KTR 1168191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 1169191665Sbms#endif 1170191665Sbms 1171192923Sbms#ifdef INVARIANTS 1172192923Sbms /* 1173192923Sbms * Sanity: Check scope zone ID was set for ifp, if and 1174192923Sbms * only if group is scoped to an interface. 1175192923Sbms */ 1176192923Sbms KASSERT(IN6_IS_ADDR_MULTICAST(mcaddr), 1177192923Sbms ("%s: not a multicast address", __func__)); 1178192923Sbms if (IN6_IS_ADDR_MC_LINKLOCAL(mcaddr) || 1179192923Sbms IN6_IS_ADDR_MC_INTFACELOCAL(mcaddr)) { 1180192923Sbms KASSERT(mcaddr->s6_addr16[1] != 0, 1181192923Sbms ("%s: scope zone ID not set", __func__)); 1182192923Sbms } 1183192923Sbms#endif 1184192923Sbms 1185191665Sbms IN6_MULTI_LOCK_ASSERT(); 1186191665Sbms 1187191665Sbms CTR4(KTR_MLD, "%s: join %s on %p(%s))", __func__, 1188191665Sbms ip6_sprintf(ip6tbuf, mcaddr), ifp, ifp->if_xname); 1189191665Sbms 1190191665Sbms error = 0; 1191191665Sbms inm = NULL; 1192191665Sbms 1193191665Sbms /* 1194191665Sbms * If no imf was specified (i.e. kernel consumer), 1195191665Sbms * fake one up and assume it is an ASM join. 1196191665Sbms */ 1197191665Sbms if (imf == NULL) { 1198191665Sbms im6f_init(&timf, MCAST_UNDEFINED, MCAST_EXCLUDE); 1199191665Sbms imf = &timf; 1200191665Sbms } 1201191665Sbms 1202191665Sbms error = in6_mc_get(ifp, mcaddr, &inm); 1203191665Sbms if (error) { 1204191665Sbms CTR1(KTR_MLD, "%s: in6_mc_get() failure", __func__); 1205191665Sbms return (error); 1206191665Sbms } 1207191665Sbms 1208191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 1209191665Sbms error = in6m_merge(inm, imf); 1210191665Sbms if (error) { 1211191665Sbms CTR1(KTR_MLD, "%s: failed to merge inm state", __func__); 1212191665Sbms goto out_in6m_release; 1213191665Sbms } 1214191665Sbms 1215191665Sbms CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 1216191665Sbms error = mld_change_state(inm, delay); 1217191665Sbms if (error) { 1218191665Sbms CTR1(KTR_MLD, "%s: failed to update source", __func__); 1219191665Sbms goto out_in6m_release; 1220191665Sbms } 1221191665Sbms 1222191665Sbmsout_in6m_release: 1223191665Sbms if (error) { 1224191665Sbms CTR2(KTR_MLD, "%s: dropping ref on %p", __func__, inm); 1225191665Sbms in6m_release_locked(inm); 1226191665Sbms } else { 1227191665Sbms *pinm = inm; 1228191665Sbms } 1229191665Sbms 1230191665Sbms return (error); 1231191665Sbms} 1232191665Sbms 1233191665Sbms/* 1234191665Sbms * Leave a multicast group; unlocked entry point. 1235191665Sbms */ 1236191665Sbmsint 1237191665Sbmsin6_mc_leave(struct in6_multi *inm, /*const*/ struct in6_mfilter *imf) 1238191665Sbms{ 1239191665Sbms struct ifnet *ifp; 1240191665Sbms int error; 1241191665Sbms 1242191665Sbms ifp = inm->in6m_ifp; 1243191665Sbms 1244191665Sbms IN6_MULTI_LOCK(); 1245191665Sbms error = in6_mc_leave_locked(inm, imf); 1246191665Sbms IN6_MULTI_UNLOCK(); 1247191665Sbms 1248191665Sbms return (error); 1249191665Sbms} 1250191665Sbms 1251191665Sbms/* 1252191665Sbms * Leave a multicast group; real entry point. 1253191665Sbms * All source filters will be expunged. 1254191665Sbms * 1255191665Sbms * Only preserves atomicity at inm level. 1256191665Sbms * 1257191665Sbms * Holding the write lock for the INP which contains imf 1258191665Sbms * is highly advisable. We can't assert for it as imf does not 1259191665Sbms * contain a back-pointer to the owning inp. 1260191665Sbms * 1261191665Sbms * Note: This is not the same as in6m_release(*) as this function also 1262191665Sbms * makes a state change downcall into MLD. 1263191665Sbms */ 1264191665Sbmsint 1265191665Sbmsin6_mc_leave_locked(struct in6_multi *inm, /*const*/ struct in6_mfilter *imf) 1266191665Sbms{ 1267191665Sbms struct in6_mfilter timf; 1268191665Sbms int error; 1269191665Sbms#ifdef KTR 1270191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 1271191665Sbms#endif 1272191665Sbms 1273191665Sbms error = 0; 1274191665Sbms 1275191665Sbms IN6_MULTI_LOCK_ASSERT(); 1276191665Sbms 1277191665Sbms CTR5(KTR_MLD, "%s: leave inm %p, %s/%s, imf %p", __func__, 1278191665Sbms inm, ip6_sprintf(ip6tbuf, &inm->in6m_addr), 1279191665Sbms (in6m_is_ifp_detached(inm) ? "null" : inm->in6m_ifp->if_xname), 1280191665Sbms imf); 1281191665Sbms 1282191665Sbms /* 1283191665Sbms * If no imf was specified (i.e. kernel consumer), 1284191665Sbms * fake one up and assume it is an ASM join. 1285191665Sbms */ 1286191665Sbms if (imf == NULL) { 1287191665Sbms im6f_init(&timf, MCAST_EXCLUDE, MCAST_UNDEFINED); 1288191665Sbms imf = &timf; 1289191665Sbms } 1290191665Sbms 1291191665Sbms /* 1292191665Sbms * Begin state merge transaction at MLD layer. 1293191665Sbms * 1294191665Sbms * As this particular invocation should not cause any memory 1295191665Sbms * to be allocated, and there is no opportunity to roll back 1296191665Sbms * the transaction, it MUST NOT fail. 1297191665Sbms */ 1298191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 1299191665Sbms error = in6m_merge(inm, imf); 1300191665Sbms KASSERT(error == 0, ("%s: failed to merge inm state", __func__)); 1301191665Sbms 1302191665Sbms CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 1303191665Sbms error = mld_change_state(inm, 0); 1304191665Sbms if (error) 1305191665Sbms CTR1(KTR_MLD, "%s: failed mld downcall", __func__); 1306191665Sbms 1307191665Sbms CTR2(KTR_MLD, "%s: dropping ref on %p", __func__, inm); 1308191665Sbms in6m_release_locked(inm); 1309191665Sbms 1310191665Sbms return (error); 1311191665Sbms} 1312191665Sbms 1313191665Sbms/* 1314191665Sbms * Block or unblock an ASM multicast source on an inpcb. 1315191665Sbms * This implements the delta-based API described in RFC 3678. 1316191665Sbms * 1317191665Sbms * The delta-based API applies only to exclusive-mode memberships. 1318191665Sbms * An MLD downcall will be performed. 1319191665Sbms * 1320191665Sbms * SMPng: NOTE: Must take Giant as a join may create a new ifma. 1321191665Sbms * 1322191665Sbms * Return 0 if successful, otherwise return an appropriate error code. 1323191665Sbms */ 1324191665Sbmsstatic int 1325191665Sbmsin6p_block_unblock_source(struct inpcb *inp, struct sockopt *sopt) 1326191665Sbms{ 1327191665Sbms struct group_source_req gsr; 1328191665Sbms sockunion_t *gsa, *ssa; 1329191665Sbms struct ifnet *ifp; 1330191665Sbms struct in6_mfilter *imf; 1331191665Sbms struct ip6_moptions *imo; 1332191665Sbms struct in6_msource *ims; 1333191665Sbms struct in6_multi *inm; 1334191665Sbms size_t idx; 1335191665Sbms uint16_t fmode; 1336191665Sbms int error, doblock; 1337191665Sbms#ifdef KTR 1338191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 1339191665Sbms#endif 1340191665Sbms 1341191665Sbms ifp = NULL; 1342191665Sbms error = 0; 1343191665Sbms doblock = 0; 1344191665Sbms 1345191665Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 1346191665Sbms gsa = (sockunion_t *)&gsr.gsr_group; 1347191665Sbms ssa = (sockunion_t *)&gsr.gsr_source; 1348191665Sbms 1349191665Sbms switch (sopt->sopt_name) { 1350191665Sbms case MCAST_BLOCK_SOURCE: 1351191665Sbms case MCAST_UNBLOCK_SOURCE: 1352191665Sbms error = sooptcopyin(sopt, &gsr, 1353191665Sbms sizeof(struct group_source_req), 1354191665Sbms sizeof(struct group_source_req)); 1355191665Sbms if (error) 1356191665Sbms return (error); 1357191665Sbms 1358191665Sbms if (gsa->sin6.sin6_family != AF_INET6 || 1359191665Sbms gsa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 1360191665Sbms return (EINVAL); 1361191665Sbms 1362191665Sbms if (ssa->sin6.sin6_family != AF_INET6 || 1363191665Sbms ssa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 1364191665Sbms return (EINVAL); 1365191665Sbms 1366191665Sbms if (gsr.gsr_interface == 0 || V_if_index < gsr.gsr_interface) 1367191665Sbms return (EADDRNOTAVAIL); 1368191665Sbms 1369191665Sbms ifp = ifnet_byindex(gsr.gsr_interface); 1370191665Sbms 1371191665Sbms if (sopt->sopt_name == MCAST_BLOCK_SOURCE) 1372191665Sbms doblock = 1; 1373191665Sbms break; 1374191665Sbms 1375191665Sbms default: 1376191665Sbms CTR2(KTR_MLD, "%s: unknown sopt_name %d", 1377191665Sbms __func__, sopt->sopt_name); 1378191665Sbms return (EOPNOTSUPP); 1379191665Sbms break; 1380191665Sbms } 1381191665Sbms 1382191665Sbms if (!IN6_IS_ADDR_MULTICAST(&gsa->sin6.sin6_addr)) 1383191665Sbms return (EINVAL); 1384191665Sbms 1385192923Sbms (void)in6_setscope(&gsa->sin6.sin6_addr, ifp, NULL); 1386192923Sbms 1387191665Sbms /* 1388191665Sbms * Check if we are actually a member of this group. 1389191665Sbms */ 1390191665Sbms imo = in6p_findmoptions(inp); 1391191665Sbms idx = im6o_match_group(imo, ifp, &gsa->sa); 1392191665Sbms if (idx == -1 || imo->im6o_mfilters == NULL) { 1393191665Sbms error = EADDRNOTAVAIL; 1394191665Sbms goto out_in6p_locked; 1395191665Sbms } 1396191665Sbms 1397191665Sbms KASSERT(imo->im6o_mfilters != NULL, 1398191665Sbms ("%s: im6o_mfilters not allocated", __func__)); 1399191665Sbms imf = &imo->im6o_mfilters[idx]; 1400191665Sbms inm = imo->im6o_membership[idx]; 1401191665Sbms 1402191665Sbms /* 1403191665Sbms * Attempting to use the delta-based API on an 1404191665Sbms * non exclusive-mode membership is an error. 1405191665Sbms */ 1406191665Sbms fmode = imf->im6f_st[0]; 1407191665Sbms if (fmode != MCAST_EXCLUDE) { 1408191665Sbms error = EINVAL; 1409191665Sbms goto out_in6p_locked; 1410191665Sbms } 1411191665Sbms 1412191665Sbms /* 1413191665Sbms * Deal with error cases up-front: 1414191665Sbms * Asked to block, but already blocked; or 1415191665Sbms * Asked to unblock, but nothing to unblock. 1416191665Sbms * If adding a new block entry, allocate it. 1417191665Sbms */ 1418191665Sbms ims = im6o_match_source(imo, idx, &ssa->sa); 1419191665Sbms if ((ims != NULL && doblock) || (ims == NULL && !doblock)) { 1420191665Sbms CTR3(KTR_MLD, "%s: source %s %spresent", __func__, 1421191665Sbms ip6_sprintf(ip6tbuf, &ssa->sin6.sin6_addr), 1422191665Sbms doblock ? "" : "not "); 1423191665Sbms error = EADDRNOTAVAIL; 1424191665Sbms goto out_in6p_locked; 1425191665Sbms } 1426191665Sbms 1427191665Sbms INP_WLOCK_ASSERT(inp); 1428191665Sbms 1429191665Sbms /* 1430191665Sbms * Begin state merge transaction at socket layer. 1431191665Sbms */ 1432191665Sbms if (doblock) { 1433191665Sbms CTR2(KTR_MLD, "%s: %s source", __func__, "block"); 1434191665Sbms ims = im6f_graft(imf, fmode, &ssa->sin6); 1435191665Sbms if (ims == NULL) 1436191665Sbms error = ENOMEM; 1437191665Sbms } else { 1438191665Sbms CTR2(KTR_MLD, "%s: %s source", __func__, "allow"); 1439191665Sbms error = im6f_prune(imf, &ssa->sin6); 1440191665Sbms } 1441191665Sbms 1442191665Sbms if (error) { 1443191665Sbms CTR1(KTR_MLD, "%s: merge imf state failed", __func__); 1444191665Sbms goto out_im6f_rollback; 1445191665Sbms } 1446191665Sbms 1447191665Sbms /* 1448191665Sbms * Begin state merge transaction at MLD layer. 1449191665Sbms */ 1450191665Sbms IN6_MULTI_LOCK(); 1451191665Sbms 1452191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 1453191665Sbms error = in6m_merge(inm, imf); 1454264722Sae if (error) 1455191665Sbms CTR1(KTR_MLD, "%s: failed to merge inm state", __func__); 1456264722Sae else { 1457264722Sae CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 1458264722Sae error = mld_change_state(inm, 0); 1459264722Sae if (error) 1460264722Sae CTR1(KTR_MLD, "%s: failed mld downcall", __func__); 1461191665Sbms } 1462191665Sbms 1463191665Sbms IN6_MULTI_UNLOCK(); 1464191665Sbms 1465191665Sbmsout_im6f_rollback: 1466191665Sbms if (error) 1467191665Sbms im6f_rollback(imf); 1468191665Sbms else 1469191665Sbms im6f_commit(imf); 1470191665Sbms 1471191665Sbms im6f_reap(imf); 1472191665Sbms 1473191665Sbmsout_in6p_locked: 1474191665Sbms INP_WUNLOCK(inp); 1475191665Sbms return (error); 1476191665Sbms} 1477191665Sbms 1478191665Sbms/* 1479191665Sbms * Given an inpcb, return its multicast options structure pointer. Accepts 1480191665Sbms * an unlocked inpcb pointer, but will return it locked. May sleep. 1481191665Sbms * 1482191665Sbms * SMPng: NOTE: Potentially calls malloc(M_WAITOK) with Giant held. 1483191665Sbms * SMPng: NOTE: Returns with the INP write lock held. 1484191665Sbms */ 1485191665Sbmsstatic struct ip6_moptions * 1486191665Sbmsin6p_findmoptions(struct inpcb *inp) 1487191665Sbms{ 1488191665Sbms struct ip6_moptions *imo; 1489191665Sbms struct in6_multi **immp; 1490191665Sbms struct in6_mfilter *imfp; 1491191665Sbms size_t idx; 1492191665Sbms 1493191665Sbms INP_WLOCK(inp); 1494191665Sbms if (inp->in6p_moptions != NULL) 1495191665Sbms return (inp->in6p_moptions); 1496191665Sbms 1497191665Sbms INP_WUNLOCK(inp); 1498191665Sbms 1499191665Sbms imo = malloc(sizeof(*imo), M_IP6MOPTS, M_WAITOK); 1500191665Sbms immp = malloc(sizeof(*immp) * IPV6_MIN_MEMBERSHIPS, M_IP6MOPTS, 1501191665Sbms M_WAITOK | M_ZERO); 1502191665Sbms imfp = malloc(sizeof(struct in6_mfilter) * IPV6_MIN_MEMBERSHIPS, 1503191665Sbms M_IN6MFILTER, M_WAITOK); 1504191665Sbms 1505191665Sbms imo->im6o_multicast_ifp = NULL; 1506191665Sbms imo->im6o_multicast_hlim = V_ip6_defmcasthlim; 1507191665Sbms imo->im6o_multicast_loop = in6_mcast_loop; 1508191665Sbms imo->im6o_num_memberships = 0; 1509191665Sbms imo->im6o_max_memberships = IPV6_MIN_MEMBERSHIPS; 1510191665Sbms imo->im6o_membership = immp; 1511191665Sbms 1512191665Sbms /* Initialize per-group source filters. */ 1513191665Sbms for (idx = 0; idx < IPV6_MIN_MEMBERSHIPS; idx++) 1514191665Sbms im6f_init(&imfp[idx], MCAST_UNDEFINED, MCAST_EXCLUDE); 1515191665Sbms imo->im6o_mfilters = imfp; 1516191665Sbms 1517191665Sbms INP_WLOCK(inp); 1518191665Sbms if (inp->in6p_moptions != NULL) { 1519191665Sbms free(imfp, M_IN6MFILTER); 1520191665Sbms free(immp, M_IP6MOPTS); 1521191665Sbms free(imo, M_IP6MOPTS); 1522191665Sbms return (inp->in6p_moptions); 1523191665Sbms } 1524191665Sbms inp->in6p_moptions = imo; 1525191665Sbms return (imo); 1526191665Sbms} 1527191665Sbms 1528191665Sbms/* 1529191665Sbms * Discard the IPv6 multicast options (and source filters). 1530191665Sbms * 1531191665Sbms * SMPng: NOTE: assumes INP write lock is held. 1532191665Sbms */ 1533191665Sbmsvoid 1534191665Sbmsip6_freemoptions(struct ip6_moptions *imo) 1535191665Sbms{ 1536191665Sbms struct in6_mfilter *imf; 1537191665Sbms size_t idx, nmships; 1538191665Sbms 1539191665Sbms KASSERT(imo != NULL, ("%s: ip6_moptions is NULL", __func__)); 1540191665Sbms 1541191665Sbms nmships = imo->im6o_num_memberships; 1542191665Sbms for (idx = 0; idx < nmships; ++idx) { 1543191665Sbms imf = imo->im6o_mfilters ? &imo->im6o_mfilters[idx] : NULL; 1544191665Sbms if (imf) 1545191665Sbms im6f_leave(imf); 1546191665Sbms /* XXX this will thrash the lock(s) */ 1547191665Sbms (void)in6_mc_leave(imo->im6o_membership[idx], imf); 1548191665Sbms if (imf) 1549191665Sbms im6f_purge(imf); 1550191665Sbms } 1551191665Sbms 1552191665Sbms if (imo->im6o_mfilters) 1553191665Sbms free(imo->im6o_mfilters, M_IN6MFILTER); 1554191665Sbms free(imo->im6o_membership, M_IP6MOPTS); 1555191665Sbms free(imo, M_IP6MOPTS); 1556191665Sbms} 1557191665Sbms 1558191665Sbms/* 1559191665Sbms * Atomically get source filters on a socket for an IPv6 multicast group. 1560191665Sbms * Called with INP lock held; returns with lock released. 1561191665Sbms */ 1562191665Sbmsstatic int 1563191665Sbmsin6p_get_source_filters(struct inpcb *inp, struct sockopt *sopt) 1564191665Sbms{ 1565191665Sbms struct __msfilterreq msfr; 1566191665Sbms sockunion_t *gsa; 1567191665Sbms struct ifnet *ifp; 1568191665Sbms struct ip6_moptions *imo; 1569191665Sbms struct in6_mfilter *imf; 1570191665Sbms struct ip6_msource *ims; 1571191665Sbms struct in6_msource *lims; 1572191665Sbms struct sockaddr_in6 *psin; 1573191665Sbms struct sockaddr_storage *ptss; 1574191665Sbms struct sockaddr_storage *tss; 1575191665Sbms int error; 1576191665Sbms size_t idx, nsrcs, ncsrcs; 1577191665Sbms 1578191665Sbms INP_WLOCK_ASSERT(inp); 1579191665Sbms 1580191665Sbms imo = inp->in6p_moptions; 1581191665Sbms KASSERT(imo != NULL, ("%s: null ip6_moptions", __func__)); 1582191665Sbms 1583191665Sbms INP_WUNLOCK(inp); 1584191665Sbms 1585191665Sbms error = sooptcopyin(sopt, &msfr, sizeof(struct __msfilterreq), 1586191665Sbms sizeof(struct __msfilterreq)); 1587191665Sbms if (error) 1588191665Sbms return (error); 1589191665Sbms 1590192923Sbms if (msfr.msfr_group.ss_family != AF_INET6 || 1591192923Sbms msfr.msfr_group.ss_len != sizeof(struct sockaddr_in6)) 1592191665Sbms return (EINVAL); 1593191665Sbms 1594192923Sbms gsa = (sockunion_t *)&msfr.msfr_group; 1595192923Sbms if (!IN6_IS_ADDR_MULTICAST(&gsa->sin6.sin6_addr)) 1596192923Sbms return (EINVAL); 1597192923Sbms 1598192923Sbms if (msfr.msfr_ifindex == 0 || V_if_index < msfr.msfr_ifindex) 1599192923Sbms return (EADDRNOTAVAIL); 1600191665Sbms ifp = ifnet_byindex(msfr.msfr_ifindex); 1601191665Sbms if (ifp == NULL) 1602192923Sbms return (EADDRNOTAVAIL); 1603192923Sbms (void)in6_setscope(&gsa->sin6.sin6_addr, ifp, NULL); 1604191665Sbms 1605191665Sbms INP_WLOCK(inp); 1606191665Sbms 1607191665Sbms /* 1608191665Sbms * Lookup group on the socket. 1609191665Sbms */ 1610191665Sbms idx = im6o_match_group(imo, ifp, &gsa->sa); 1611191665Sbms if (idx == -1 || imo->im6o_mfilters == NULL) { 1612191665Sbms INP_WUNLOCK(inp); 1613191665Sbms return (EADDRNOTAVAIL); 1614191665Sbms } 1615191665Sbms imf = &imo->im6o_mfilters[idx]; 1616191665Sbms 1617191665Sbms /* 1618191665Sbms * Ignore memberships which are in limbo. 1619191665Sbms */ 1620191665Sbms if (imf->im6f_st[1] == MCAST_UNDEFINED) { 1621191665Sbms INP_WUNLOCK(inp); 1622191665Sbms return (EAGAIN); 1623191665Sbms } 1624191665Sbms msfr.msfr_fmode = imf->im6f_st[1]; 1625191665Sbms 1626191665Sbms /* 1627191665Sbms * If the user specified a buffer, copy out the source filter 1628191665Sbms * entries to userland gracefully. 1629191665Sbms * We only copy out the number of entries which userland 1630191665Sbms * has asked for, but we always tell userland how big the 1631191665Sbms * buffer really needs to be. 1632191665Sbms */ 1633254629Sdelphij if (msfr.msfr_nsrcs > in6_mcast_maxsocksrc) 1634254629Sdelphij msfr.msfr_nsrcs = in6_mcast_maxsocksrc; 1635191665Sbms tss = NULL; 1636191665Sbms if (msfr.msfr_srcs != NULL && msfr.msfr_nsrcs > 0) { 1637191665Sbms tss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs, 1638191665Sbms M_TEMP, M_NOWAIT | M_ZERO); 1639191665Sbms if (tss == NULL) { 1640191665Sbms INP_WUNLOCK(inp); 1641191665Sbms return (ENOBUFS); 1642191665Sbms } 1643191665Sbms } 1644191665Sbms 1645191665Sbms /* 1646191665Sbms * Count number of sources in-mode at t0. 1647191665Sbms * If buffer space exists and remains, copy out source entries. 1648191665Sbms */ 1649191665Sbms nsrcs = msfr.msfr_nsrcs; 1650191665Sbms ncsrcs = 0; 1651191665Sbms ptss = tss; 1652191665Sbms RB_FOREACH(ims, ip6_msource_tree, &imf->im6f_sources) { 1653191665Sbms lims = (struct in6_msource *)ims; 1654191665Sbms if (lims->im6sl_st[0] == MCAST_UNDEFINED || 1655191665Sbms lims->im6sl_st[0] != imf->im6f_st[0]) 1656191665Sbms continue; 1657191665Sbms ++ncsrcs; 1658191665Sbms if (tss != NULL && nsrcs > 0) { 1659191665Sbms psin = (struct sockaddr_in6 *)ptss; 1660191665Sbms psin->sin6_family = AF_INET6; 1661191665Sbms psin->sin6_len = sizeof(struct sockaddr_in6); 1662191665Sbms psin->sin6_addr = lims->im6s_addr; 1663191665Sbms psin->sin6_port = 0; 1664191665Sbms --nsrcs; 1665191665Sbms ++ptss; 1666191665Sbms } 1667191665Sbms } 1668191665Sbms 1669191665Sbms INP_WUNLOCK(inp); 1670191665Sbms 1671191665Sbms if (tss != NULL) { 1672191665Sbms error = copyout(tss, msfr.msfr_srcs, 1673191665Sbms sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs); 1674191665Sbms free(tss, M_TEMP); 1675191665Sbms if (error) 1676191665Sbms return (error); 1677191665Sbms } 1678191665Sbms 1679191665Sbms msfr.msfr_nsrcs = ncsrcs; 1680191665Sbms error = sooptcopyout(sopt, &msfr, sizeof(struct __msfilterreq)); 1681191665Sbms 1682191665Sbms return (error); 1683191665Sbms} 1684191665Sbms 1685191665Sbms/* 1686191665Sbms * Return the IP multicast options in response to user getsockopt(). 1687191665Sbms */ 1688191665Sbmsint 1689191665Sbmsip6_getmoptions(struct inpcb *inp, struct sockopt *sopt) 1690191665Sbms{ 1691191672Sbms struct ip6_moptions *im6o; 1692191672Sbms int error; 1693191672Sbms u_int optval; 1694191665Sbms 1695191665Sbms INP_WLOCK(inp); 1696191672Sbms im6o = inp->in6p_moptions; 1697191665Sbms /* 1698191665Sbms * If socket is neither of type SOCK_RAW or SOCK_DGRAM, 1699191665Sbms * or is a divert socket, reject it. 1700191665Sbms */ 1701191665Sbms if (inp->inp_socket->so_proto->pr_protocol == IPPROTO_DIVERT || 1702191665Sbms (inp->inp_socket->so_proto->pr_type != SOCK_RAW && 1703191665Sbms inp->inp_socket->so_proto->pr_type != SOCK_DGRAM)) { 1704191665Sbms INP_WUNLOCK(inp); 1705191665Sbms return (EOPNOTSUPP); 1706191665Sbms } 1707191665Sbms 1708191665Sbms error = 0; 1709191665Sbms switch (sopt->sopt_name) { 1710191665Sbms case IPV6_MULTICAST_IF: 1711191672Sbms if (im6o == NULL || im6o->im6o_multicast_ifp == NULL) { 1712191665Sbms optval = 0; 1713191665Sbms } else { 1714191672Sbms optval = im6o->im6o_multicast_ifp->if_index; 1715191665Sbms } 1716191665Sbms INP_WUNLOCK(inp); 1717191672Sbms error = sooptcopyout(sopt, &optval, sizeof(u_int)); 1718191665Sbms break; 1719191665Sbms 1720191665Sbms case IPV6_MULTICAST_HOPS: 1721191672Sbms if (im6o == NULL) 1722191672Sbms optval = V_ip6_defmcasthlim; 1723191665Sbms else 1724227481Sbz optval = im6o->im6o_multicast_hlim; 1725191665Sbms INP_WUNLOCK(inp); 1726191665Sbms error = sooptcopyout(sopt, &optval, sizeof(u_int)); 1727191665Sbms break; 1728191665Sbms 1729191665Sbms case IPV6_MULTICAST_LOOP: 1730191672Sbms if (im6o == NULL) 1731191672Sbms optval = in6_mcast_loop; /* XXX VIMAGE */ 1732191665Sbms else 1733191672Sbms optval = im6o->im6o_multicast_loop; 1734191665Sbms INP_WUNLOCK(inp); 1735191665Sbms error = sooptcopyout(sopt, &optval, sizeof(u_int)); 1736191665Sbms break; 1737191665Sbms 1738191665Sbms case IPV6_MSFILTER: 1739191672Sbms if (im6o == NULL) { 1740191665Sbms error = EADDRNOTAVAIL; 1741191665Sbms INP_WUNLOCK(inp); 1742191665Sbms } else { 1743191665Sbms error = in6p_get_source_filters(inp, sopt); 1744191665Sbms } 1745191665Sbms break; 1746191665Sbms 1747191665Sbms default: 1748191665Sbms INP_WUNLOCK(inp); 1749191665Sbms error = ENOPROTOOPT; 1750191665Sbms break; 1751191665Sbms } 1752191665Sbms 1753191665Sbms INP_UNLOCK_ASSERT(inp); 1754191665Sbms 1755191665Sbms return (error); 1756191665Sbms} 1757191665Sbms 1758191665Sbms/* 1759191672Sbms * Look up the ifnet to use for a multicast group membership, 1760191672Sbms * given the address of an IPv6 group. 1761191672Sbms * 1762191672Sbms * This routine exists to support legacy IPv6 multicast applications. 1763191672Sbms * 1764191672Sbms * If inp is non-NULL, use this socket's current FIB number for any 1765191672Sbms * required FIB lookup. Look up the group address in the unicast FIB, 1766191672Sbms * and use its ifp; usually, this points to the default next-hop. 1767191672Sbms * If the FIB lookup fails, return NULL. 1768191672Sbms * 1769191672Sbms * FUTURE: Support multiple forwarding tables for IPv6. 1770191672Sbms * 1771191672Sbms * Returns NULL if no ifp could be found. 1772191672Sbms */ 1773191672Sbmsstatic struct ifnet * 1774231852Sbzin6p_lookup_mcast_ifp(const struct inpcb *in6p, 1775191672Sbms const struct sockaddr_in6 *gsin6) 1776191672Sbms{ 1777191672Sbms struct route_in6 ro6; 1778191672Sbms struct ifnet *ifp; 1779191672Sbms 1780191672Sbms KASSERT(in6p->inp_vflag & INP_IPV6, 1781191672Sbms ("%s: not INP_IPV6 inpcb", __func__)); 1782191672Sbms KASSERT(gsin6->sin6_family == AF_INET6, 1783191672Sbms ("%s: not AF_INET6 group", __func__)); 1784191672Sbms 1785191672Sbms ifp = NULL; 1786191672Sbms memset(&ro6, 0, sizeof(struct route_in6)); 1787191672Sbms memcpy(&ro6.ro_dst, gsin6, sizeof(struct sockaddr_in6)); 1788231852Sbz rtalloc_ign_fib((struct route *)&ro6, 0, 1789231852Sbz in6p ? in6p->inp_inc.inc_fibnum : RT_DEFAULT_FIB); 1790191672Sbms if (ro6.ro_rt != NULL) { 1791191672Sbms ifp = ro6.ro_rt->rt_ifp; 1792191672Sbms KASSERT(ifp != NULL, ("%s: null ifp", __func__)); 1793191672Sbms RTFREE(ro6.ro_rt); 1794191672Sbms } 1795191672Sbms 1796191672Sbms return (ifp); 1797191672Sbms} 1798191672Sbms 1799191672Sbms/* 1800191665Sbms * Join an IPv6 multicast group, possibly with a source. 1801191672Sbms * 1802191672Sbms * FIXME: The KAME use of the unspecified address (::) 1803191672Sbms * to join *all* multicast groups is currently unsupported. 1804191665Sbms */ 1805191665Sbmsstatic int 1806191665Sbmsin6p_join_group(struct inpcb *inp, struct sockopt *sopt) 1807191665Sbms{ 1808191665Sbms struct group_source_req gsr; 1809191665Sbms sockunion_t *gsa, *ssa; 1810191665Sbms struct ifnet *ifp; 1811191665Sbms struct in6_mfilter *imf; 1812191665Sbms struct ip6_moptions *imo; 1813191665Sbms struct in6_multi *inm; 1814191665Sbms struct in6_msource *lims; 1815191665Sbms size_t idx; 1816191665Sbms int error, is_new; 1817191665Sbms 1818191665Sbms ifp = NULL; 1819191665Sbms imf = NULL; 1820199528Sbms lims = NULL; 1821191665Sbms error = 0; 1822191665Sbms is_new = 0; 1823191665Sbms 1824191665Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 1825191665Sbms gsa = (sockunion_t *)&gsr.gsr_group; 1826191665Sbms gsa->ss.ss_family = AF_UNSPEC; 1827191665Sbms ssa = (sockunion_t *)&gsr.gsr_source; 1828191665Sbms ssa->ss.ss_family = AF_UNSPEC; 1829191665Sbms 1830192923Sbms /* 1831192923Sbms * Chew everything into struct group_source_req. 1832192923Sbms * Overwrite the port field if present, as the sockaddr 1833192923Sbms * being copied in may be matched with a binary comparison. 1834192923Sbms * Ignore passed-in scope ID. 1835192923Sbms */ 1836191665Sbms switch (sopt->sopt_name) { 1837191665Sbms case IPV6_JOIN_GROUP: { 1838191665Sbms struct ipv6_mreq mreq; 1839191665Sbms 1840191665Sbms error = sooptcopyin(sopt, &mreq, sizeof(struct ipv6_mreq), 1841191665Sbms sizeof(struct ipv6_mreq)); 1842191665Sbms if (error) 1843191665Sbms return (error); 1844191665Sbms 1845191665Sbms gsa->sin6.sin6_family = AF_INET6; 1846191665Sbms gsa->sin6.sin6_len = sizeof(struct sockaddr_in6); 1847191665Sbms gsa->sin6.sin6_addr = mreq.ipv6mr_multiaddr; 1848191665Sbms 1849191672Sbms if (mreq.ipv6mr_interface == 0) { 1850191672Sbms ifp = in6p_lookup_mcast_ifp(inp, &gsa->sin6); 1851191672Sbms } else { 1852270044Sbz if (V_if_index < mreq.ipv6mr_interface) 1853191672Sbms return (EADDRNOTAVAIL); 1854191672Sbms ifp = ifnet_byindex(mreq.ipv6mr_interface); 1855191672Sbms } 1856191665Sbms CTR3(KTR_MLD, "%s: ipv6mr_interface = %d, ifp = %p", 1857191665Sbms __func__, mreq.ipv6mr_interface, ifp); 1858191665Sbms } break; 1859191665Sbms 1860191665Sbms case MCAST_JOIN_GROUP: 1861191665Sbms case MCAST_JOIN_SOURCE_GROUP: 1862191665Sbms if (sopt->sopt_name == MCAST_JOIN_GROUP) { 1863191665Sbms error = sooptcopyin(sopt, &gsr, 1864191665Sbms sizeof(struct group_req), 1865191665Sbms sizeof(struct group_req)); 1866191665Sbms } else if (sopt->sopt_name == MCAST_JOIN_SOURCE_GROUP) { 1867191665Sbms error = sooptcopyin(sopt, &gsr, 1868191665Sbms sizeof(struct group_source_req), 1869191665Sbms sizeof(struct group_source_req)); 1870191665Sbms } 1871191665Sbms if (error) 1872191665Sbms return (error); 1873191665Sbms 1874191665Sbms if (gsa->sin6.sin6_family != AF_INET6 || 1875191665Sbms gsa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 1876191665Sbms return (EINVAL); 1877191665Sbms 1878191665Sbms if (sopt->sopt_name == MCAST_JOIN_SOURCE_GROUP) { 1879191665Sbms if (ssa->sin6.sin6_family != AF_INET6 || 1880191665Sbms ssa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 1881191665Sbms return (EINVAL); 1882192923Sbms if (IN6_IS_ADDR_MULTICAST(&ssa->sin6.sin6_addr)) 1883192923Sbms return (EINVAL); 1884192923Sbms /* 1885192923Sbms * TODO: Validate embedded scope ID in source 1886192923Sbms * list entry against passed-in ifp, if and only 1887192923Sbms * if source list filter entry is iface or node local. 1888192923Sbms */ 1889192923Sbms in6_clearscope(&ssa->sin6.sin6_addr); 1890191665Sbms ssa->sin6.sin6_port = 0; 1891192923Sbms ssa->sin6.sin6_scope_id = 0; 1892191665Sbms } 1893191665Sbms 1894191665Sbms if (gsr.gsr_interface == 0 || V_if_index < gsr.gsr_interface) 1895191665Sbms return (EADDRNOTAVAIL); 1896191665Sbms ifp = ifnet_byindex(gsr.gsr_interface); 1897191665Sbms break; 1898191665Sbms 1899191665Sbms default: 1900191665Sbms CTR2(KTR_MLD, "%s: unknown sopt_name %d", 1901191665Sbms __func__, sopt->sopt_name); 1902191665Sbms return (EOPNOTSUPP); 1903191665Sbms break; 1904191665Sbms } 1905191665Sbms 1906191665Sbms if (!IN6_IS_ADDR_MULTICAST(&gsa->sin6.sin6_addr)) 1907191665Sbms return (EINVAL); 1908191665Sbms 1909191665Sbms if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) 1910191665Sbms return (EADDRNOTAVAIL); 1911191665Sbms 1912192923Sbms gsa->sin6.sin6_port = 0; 1913192923Sbms gsa->sin6.sin6_scope_id = 0; 1914192923Sbms 1915191665Sbms /* 1916192923Sbms * Always set the scope zone ID on memberships created from userland. 1917192923Sbms * Use the passed-in ifp to do this. 1918192923Sbms * XXX The in6_setscope() return value is meaningless. 1919192923Sbms * XXX SCOPE6_LOCK() is taken by in6_setscope(). 1920191672Sbms */ 1921192923Sbms (void)in6_setscope(&gsa->sin6.sin6_addr, ifp, NULL); 1922191672Sbms 1923191665Sbms imo = in6p_findmoptions(inp); 1924191665Sbms idx = im6o_match_group(imo, ifp, &gsa->sa); 1925191665Sbms if (idx == -1) { 1926191665Sbms is_new = 1; 1927191665Sbms } else { 1928191665Sbms inm = imo->im6o_membership[idx]; 1929191665Sbms imf = &imo->im6o_mfilters[idx]; 1930199526Sbms if (ssa->ss.ss_family != AF_UNSPEC) { 1931199526Sbms /* 1932199526Sbms * MCAST_JOIN_SOURCE_GROUP on an exclusive membership 1933199526Sbms * is an error. On an existing inclusive membership, 1934199526Sbms * it just adds the source to the filter list. 1935199526Sbms */ 1936199526Sbms if (imf->im6f_st[1] != MCAST_INCLUDE) { 1937199526Sbms error = EINVAL; 1938199526Sbms goto out_in6p_locked; 1939199526Sbms } 1940199528Sbms /* 1941199528Sbms * Throw out duplicates. 1942199528Sbms * 1943199528Sbms * XXX FIXME: This makes a naive assumption that 1944199528Sbms * even if entries exist for *ssa in this imf, 1945199528Sbms * they will be rejected as dupes, even if they 1946199528Sbms * are not valid in the current mode (in-mode). 1947199528Sbms * 1948199528Sbms * in6_msource is transactioned just as for anything 1949199528Sbms * else in SSM -- but note naive use of in6m_graft() 1950199528Sbms * below for allocating new filter entries. 1951199528Sbms * 1952199528Sbms * This is only an issue if someone mixes the 1953199528Sbms * full-state SSM API with the delta-based API, 1954199528Sbms * which is discouraged in the relevant RFCs. 1955199528Sbms */ 1956199526Sbms lims = im6o_match_source(imo, idx, &ssa->sa); 1957199528Sbms if (lims != NULL /*&& 1958199528Sbms lims->im6sl_st[1] == MCAST_INCLUDE*/) { 1959199526Sbms error = EADDRNOTAVAIL; 1960199526Sbms goto out_in6p_locked; 1961199526Sbms } 1962199526Sbms } else { 1963199526Sbms /* 1964199527Sbms * MCAST_JOIN_GROUP alone, on any existing membership, 1965199527Sbms * is rejected, to stop the same inpcb tying up 1966199527Sbms * multiple refs to the in_multi. 1967199527Sbms * On an existing inclusive membership, this is also 1968199527Sbms * an error; if you want to change filter mode, 1969199527Sbms * you must use the userland API setsourcefilter(). 1970199527Sbms * XXX We don't reject this for imf in UNDEFINED 1971199527Sbms * state at t1, because allocation of a filter 1972199527Sbms * is atomic with allocation of a membership. 1973199526Sbms */ 1974199527Sbms error = EINVAL; 1975199527Sbms goto out_in6p_locked; 1976191665Sbms } 1977191665Sbms } 1978191665Sbms 1979191665Sbms /* 1980191665Sbms * Begin state merge transaction at socket layer. 1981191665Sbms */ 1982191665Sbms INP_WLOCK_ASSERT(inp); 1983191665Sbms 1984191665Sbms if (is_new) { 1985191665Sbms if (imo->im6o_num_memberships == imo->im6o_max_memberships) { 1986191665Sbms error = im6o_grow(imo); 1987191665Sbms if (error) 1988191665Sbms goto out_in6p_locked; 1989191665Sbms } 1990191665Sbms /* 1991191665Sbms * Allocate the new slot upfront so we can deal with 1992191665Sbms * grafting the new source filter in same code path 1993191665Sbms * as for join-source on existing membership. 1994191665Sbms */ 1995191665Sbms idx = imo->im6o_num_memberships; 1996191665Sbms imo->im6o_membership[idx] = NULL; 1997191665Sbms imo->im6o_num_memberships++; 1998191665Sbms KASSERT(imo->im6o_mfilters != NULL, 1999191665Sbms ("%s: im6f_mfilters vector was not allocated", __func__)); 2000191665Sbms imf = &imo->im6o_mfilters[idx]; 2001191665Sbms KASSERT(RB_EMPTY(&imf->im6f_sources), 2002191665Sbms ("%s: im6f_sources not empty", __func__)); 2003191665Sbms } 2004191665Sbms 2005191665Sbms /* 2006191665Sbms * Graft new source into filter list for this inpcb's 2007191665Sbms * membership of the group. The in6_multi may not have 2008199526Sbms * been allocated yet if this is a new membership, however, 2009199526Sbms * the in_mfilter slot will be allocated and must be initialized. 2010199527Sbms * 2011199527Sbms * Note: Grafting of exclusive mode filters doesn't happen 2012199527Sbms * in this path. 2013199528Sbms * XXX: Should check for non-NULL lims (node exists but may 2014199528Sbms * not be in-mode) for interop with full-state API. 2015191665Sbms */ 2016191665Sbms if (ssa->ss.ss_family != AF_UNSPEC) { 2017191665Sbms /* Membership starts in IN mode */ 2018191665Sbms if (is_new) { 2019191665Sbms CTR1(KTR_MLD, "%s: new join w/source", __func__); 2020191665Sbms im6f_init(imf, MCAST_UNDEFINED, MCAST_INCLUDE); 2021191665Sbms } else { 2022191665Sbms CTR2(KTR_MLD, "%s: %s source", __func__, "allow"); 2023191665Sbms } 2024191665Sbms lims = im6f_graft(imf, MCAST_INCLUDE, &ssa->sin6); 2025191665Sbms if (lims == NULL) { 2026191665Sbms CTR1(KTR_MLD, "%s: merge imf state failed", 2027191665Sbms __func__); 2028191665Sbms error = ENOMEM; 2029191665Sbms goto out_im6o_free; 2030191665Sbms } 2031199526Sbms } else { 2032199526Sbms /* No address specified; Membership starts in EX mode */ 2033199526Sbms if (is_new) { 2034199526Sbms CTR1(KTR_MLD, "%s: new join w/o source", __func__); 2035199526Sbms im6f_init(imf, MCAST_UNDEFINED, MCAST_EXCLUDE); 2036199526Sbms } 2037191665Sbms } 2038191665Sbms 2039191665Sbms /* 2040191665Sbms * Begin state merge transaction at MLD layer. 2041191665Sbms */ 2042191665Sbms IN6_MULTI_LOCK(); 2043191665Sbms 2044191665Sbms if (is_new) { 2045191665Sbms error = in6_mc_join_locked(ifp, &gsa->sin6.sin6_addr, imf, 2046191665Sbms &inm, 0); 2047264722Sae if (error) { 2048264722Sae IN6_MULTI_UNLOCK(); 2049191665Sbms goto out_im6o_free; 2050264722Sae } 2051191665Sbms imo->im6o_membership[idx] = inm; 2052191665Sbms } else { 2053191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 2054191665Sbms error = in6m_merge(inm, imf); 2055264722Sae if (error) 2056191665Sbms CTR1(KTR_MLD, "%s: failed to merge inm state", 2057191665Sbms __func__); 2058264722Sae else { 2059264722Sae CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 2060264722Sae error = mld_change_state(inm, 0); 2061264722Sae if (error) 2062264722Sae CTR1(KTR_MLD, "%s: failed mld downcall", 2063264722Sae __func__); 2064191665Sbms } 2065191665Sbms } 2066191665Sbms 2067191665Sbms IN6_MULTI_UNLOCK(); 2068191665Sbms INP_WLOCK_ASSERT(inp); 2069191665Sbms if (error) { 2070191665Sbms im6f_rollback(imf); 2071191665Sbms if (is_new) 2072191665Sbms im6f_purge(imf); 2073191665Sbms else 2074191665Sbms im6f_reap(imf); 2075191665Sbms } else { 2076191665Sbms im6f_commit(imf); 2077191665Sbms } 2078191665Sbms 2079191665Sbmsout_im6o_free: 2080191665Sbms if (error && is_new) { 2081191665Sbms imo->im6o_membership[idx] = NULL; 2082191665Sbms --imo->im6o_num_memberships; 2083191665Sbms } 2084191665Sbms 2085191665Sbmsout_in6p_locked: 2086191665Sbms INP_WUNLOCK(inp); 2087191665Sbms return (error); 2088191665Sbms} 2089191665Sbms 2090191665Sbms/* 2091191665Sbms * Leave an IPv6 multicast group on an inpcb, possibly with a source. 2092191665Sbms */ 2093191665Sbmsstatic int 2094191665Sbmsin6p_leave_group(struct inpcb *inp, struct sockopt *sopt) 2095191665Sbms{ 2096192923Sbms struct ipv6_mreq mreq; 2097191665Sbms struct group_source_req gsr; 2098191665Sbms sockunion_t *gsa, *ssa; 2099191665Sbms struct ifnet *ifp; 2100191665Sbms struct in6_mfilter *imf; 2101191665Sbms struct ip6_moptions *imo; 2102191665Sbms struct in6_msource *ims; 2103191665Sbms struct in6_multi *inm; 2104192923Sbms uint32_t ifindex; 2105191665Sbms size_t idx; 2106191665Sbms int error, is_final; 2107191665Sbms#ifdef KTR 2108191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 2109191665Sbms#endif 2110191665Sbms 2111191665Sbms ifp = NULL; 2112192923Sbms ifindex = 0; 2113191665Sbms error = 0; 2114191665Sbms is_final = 1; 2115191665Sbms 2116191665Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 2117191665Sbms gsa = (sockunion_t *)&gsr.gsr_group; 2118191665Sbms gsa->ss.ss_family = AF_UNSPEC; 2119191665Sbms ssa = (sockunion_t *)&gsr.gsr_source; 2120191665Sbms ssa->ss.ss_family = AF_UNSPEC; 2121191665Sbms 2122192923Sbms /* 2123192923Sbms * Chew everything passed in up into a struct group_source_req 2124192923Sbms * as that is easier to process. 2125192923Sbms * Note: Any embedded scope ID in the multicast group passed 2126192923Sbms * in by userland is ignored, the interface index is the recommended 2127192923Sbms * mechanism to specify an interface; see below. 2128192923Sbms */ 2129191665Sbms switch (sopt->sopt_name) { 2130192923Sbms case IPV6_LEAVE_GROUP: 2131191665Sbms error = sooptcopyin(sopt, &mreq, sizeof(struct ipv6_mreq), 2132191665Sbms sizeof(struct ipv6_mreq)); 2133191665Sbms if (error) 2134191665Sbms return (error); 2135191665Sbms gsa->sin6.sin6_family = AF_INET6; 2136191665Sbms gsa->sin6.sin6_len = sizeof(struct sockaddr_in6); 2137191665Sbms gsa->sin6.sin6_addr = mreq.ipv6mr_multiaddr; 2138192923Sbms gsa->sin6.sin6_port = 0; 2139192923Sbms gsa->sin6.sin6_scope_id = 0; 2140192923Sbms ifindex = mreq.ipv6mr_interface; 2141192923Sbms break; 2142191665Sbms 2143191665Sbms case MCAST_LEAVE_GROUP: 2144191665Sbms case MCAST_LEAVE_SOURCE_GROUP: 2145191665Sbms if (sopt->sopt_name == MCAST_LEAVE_GROUP) { 2146191665Sbms error = sooptcopyin(sopt, &gsr, 2147191665Sbms sizeof(struct group_req), 2148191665Sbms sizeof(struct group_req)); 2149191665Sbms } else if (sopt->sopt_name == MCAST_LEAVE_SOURCE_GROUP) { 2150191665Sbms error = sooptcopyin(sopt, &gsr, 2151191665Sbms sizeof(struct group_source_req), 2152191665Sbms sizeof(struct group_source_req)); 2153191665Sbms } 2154191665Sbms if (error) 2155191665Sbms return (error); 2156191665Sbms 2157191665Sbms if (gsa->sin6.sin6_family != AF_INET6 || 2158191665Sbms gsa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 2159191665Sbms return (EINVAL); 2160191665Sbms if (sopt->sopt_name == MCAST_LEAVE_SOURCE_GROUP) { 2161191665Sbms if (ssa->sin6.sin6_family != AF_INET6 || 2162191665Sbms ssa->sin6.sin6_len != sizeof(struct sockaddr_in6)) 2163191665Sbms return (EINVAL); 2164192923Sbms if (IN6_IS_ADDR_MULTICAST(&ssa->sin6.sin6_addr)) 2165192923Sbms return (EINVAL); 2166192923Sbms /* 2167192923Sbms * TODO: Validate embedded scope ID in source 2168192923Sbms * list entry against passed-in ifp, if and only 2169192923Sbms * if source list filter entry is iface or node local. 2170192923Sbms */ 2171192923Sbms in6_clearscope(&ssa->sin6.sin6_addr); 2172191665Sbms } 2173192923Sbms gsa->sin6.sin6_port = 0; 2174192923Sbms gsa->sin6.sin6_scope_id = 0; 2175192923Sbms ifindex = gsr.gsr_interface; 2176191665Sbms break; 2177191665Sbms 2178191665Sbms default: 2179191665Sbms CTR2(KTR_MLD, "%s: unknown sopt_name %d", 2180191665Sbms __func__, sopt->sopt_name); 2181191665Sbms return (EOPNOTSUPP); 2182191665Sbms break; 2183191665Sbms } 2184191665Sbms 2185191665Sbms if (!IN6_IS_ADDR_MULTICAST(&gsa->sin6.sin6_addr)) 2186191665Sbms return (EINVAL); 2187191665Sbms 2188191665Sbms /* 2189192923Sbms * Validate interface index if provided. If no interface index 2190192923Sbms * was provided separately, attempt to look the membership up 2191192923Sbms * from the default scope as a last resort to disambiguate 2192192923Sbms * the membership we are being asked to leave. 2193192923Sbms * XXX SCOPE6 lock potentially taken here. 2194191672Sbms */ 2195192923Sbms if (ifindex != 0) { 2196270044Sbz if (V_if_index < ifindex) 2197192923Sbms return (EADDRNOTAVAIL); 2198192923Sbms ifp = ifnet_byindex(ifindex); 2199192923Sbms if (ifp == NULL) 2200192923Sbms return (EADDRNOTAVAIL); 2201192923Sbms (void)in6_setscope(&gsa->sin6.sin6_addr, ifp, NULL); 2202192923Sbms } else { 2203192923Sbms error = sa6_embedscope(&gsa->sin6, V_ip6_use_defzone); 2204192923Sbms if (error) 2205192923Sbms return (EADDRNOTAVAIL); 2206192923Sbms /* 2207195755Sbms * Some badly behaved applications don't pass an ifindex 2208195755Sbms * or a scope ID, which is an API violation. In this case, 2209195755Sbms * perform a lookup as per a v6 join. 2210195755Sbms * 2211192923Sbms * XXX For now, stomp on zone ID for the corner case. 2212192923Sbms * This is not the 'KAME way', but we need to see the ifp 2213192923Sbms * directly until such time as this implementation is 2214192923Sbms * refactored, assuming the scope IDs are the way to go. 2215192923Sbms */ 2216192923Sbms ifindex = ntohs(gsa->sin6.sin6_addr.s6_addr16[1]); 2217195755Sbms if (ifindex == 0) { 2218195755Sbms CTR2(KTR_MLD, "%s: warning: no ifindex, looking up " 2219195755Sbms "ifp for group %s.", __func__, 2220195755Sbms ip6_sprintf(ip6tbuf, &gsa->sin6.sin6_addr)); 2221195755Sbms ifp = in6p_lookup_mcast_ifp(inp, &gsa->sin6); 2222195755Sbms } else { 2223195755Sbms ifp = ifnet_byindex(ifindex); 2224195755Sbms } 2225192923Sbms if (ifp == NULL) 2226192923Sbms return (EADDRNOTAVAIL); 2227192923Sbms } 2228191672Sbms 2229192923Sbms CTR2(KTR_MLD, "%s: ifp = %p", __func__, ifp); 2230192923Sbms KASSERT(ifp != NULL, ("%s: ifp did not resolve", __func__)); 2231192923Sbms 2232191672Sbms /* 2233191665Sbms * Find the membership in the membership array. 2234191665Sbms */ 2235191665Sbms imo = in6p_findmoptions(inp); 2236191665Sbms idx = im6o_match_group(imo, ifp, &gsa->sa); 2237191665Sbms if (idx == -1) { 2238191665Sbms error = EADDRNOTAVAIL; 2239191665Sbms goto out_in6p_locked; 2240191665Sbms } 2241191665Sbms inm = imo->im6o_membership[idx]; 2242191665Sbms imf = &imo->im6o_mfilters[idx]; 2243191665Sbms 2244191665Sbms if (ssa->ss.ss_family != AF_UNSPEC) 2245191665Sbms is_final = 0; 2246191665Sbms 2247191665Sbms /* 2248191665Sbms * Begin state merge transaction at socket layer. 2249191665Sbms */ 2250191665Sbms INP_WLOCK_ASSERT(inp); 2251191665Sbms 2252191665Sbms /* 2253191665Sbms * If we were instructed only to leave a given source, do so. 2254191665Sbms * MCAST_LEAVE_SOURCE_GROUP is only valid for inclusive memberships. 2255191665Sbms */ 2256191665Sbms if (is_final) { 2257191665Sbms im6f_leave(imf); 2258191665Sbms } else { 2259191665Sbms if (imf->im6f_st[0] == MCAST_EXCLUDE) { 2260191665Sbms error = EADDRNOTAVAIL; 2261191665Sbms goto out_in6p_locked; 2262191665Sbms } 2263191665Sbms ims = im6o_match_source(imo, idx, &ssa->sa); 2264191665Sbms if (ims == NULL) { 2265191665Sbms CTR3(KTR_MLD, "%s: source %p %spresent", __func__, 2266191665Sbms ip6_sprintf(ip6tbuf, &ssa->sin6.sin6_addr), 2267191665Sbms "not "); 2268191665Sbms error = EADDRNOTAVAIL; 2269191665Sbms goto out_in6p_locked; 2270191665Sbms } 2271191665Sbms CTR2(KTR_MLD, "%s: %s source", __func__, "block"); 2272191665Sbms error = im6f_prune(imf, &ssa->sin6); 2273191665Sbms if (error) { 2274191665Sbms CTR1(KTR_MLD, "%s: merge imf state failed", 2275191665Sbms __func__); 2276191665Sbms goto out_in6p_locked; 2277191665Sbms } 2278191665Sbms } 2279191665Sbms 2280191665Sbms /* 2281191665Sbms * Begin state merge transaction at MLD layer. 2282191665Sbms */ 2283191665Sbms IN6_MULTI_LOCK(); 2284191665Sbms 2285191665Sbms if (is_final) { 2286191665Sbms /* 2287191665Sbms * Give up the multicast address record to which 2288191665Sbms * the membership points. 2289191665Sbms */ 2290191665Sbms (void)in6_mc_leave_locked(inm, imf); 2291191665Sbms } else { 2292191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 2293191665Sbms error = in6m_merge(inm, imf); 2294264722Sae if (error) 2295191665Sbms CTR1(KTR_MLD, "%s: failed to merge inm state", 2296191665Sbms __func__); 2297264722Sae else { 2298264722Sae CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 2299264722Sae error = mld_change_state(inm, 0); 2300264722Sae if (error) 2301264722Sae CTR1(KTR_MLD, "%s: failed mld downcall", 2302264722Sae __func__); 2303191665Sbms } 2304191665Sbms } 2305191665Sbms 2306191665Sbms IN6_MULTI_UNLOCK(); 2307191665Sbms 2308191665Sbms if (error) 2309191665Sbms im6f_rollback(imf); 2310191665Sbms else 2311191665Sbms im6f_commit(imf); 2312191665Sbms 2313191665Sbms im6f_reap(imf); 2314191665Sbms 2315191665Sbms if (is_final) { 2316191665Sbms /* Remove the gap in the membership array. */ 2317199522Sbms for (++idx; idx < imo->im6o_num_memberships; ++idx) { 2318191665Sbms imo->im6o_membership[idx-1] = imo->im6o_membership[idx]; 2319199522Sbms imo->im6o_mfilters[idx-1] = imo->im6o_mfilters[idx]; 2320199522Sbms } 2321191665Sbms imo->im6o_num_memberships--; 2322191665Sbms } 2323191665Sbms 2324191665Sbmsout_in6p_locked: 2325191665Sbms INP_WUNLOCK(inp); 2326191665Sbms return (error); 2327191665Sbms} 2328191665Sbms 2329191665Sbms/* 2330191665Sbms * Select the interface for transmitting IPv6 multicast datagrams. 2331191665Sbms * 2332191665Sbms * Either an instance of struct in6_addr or an instance of struct ipv6_mreqn 2333191665Sbms * may be passed to this socket option. An address of in6addr_any or an 2334191665Sbms * interface index of 0 is used to remove a previous selection. 2335191665Sbms * When no interface is selected, one is chosen for every send. 2336191665Sbms */ 2337191665Sbmsstatic int 2338191665Sbmsin6p_set_multicast_if(struct inpcb *inp, struct sockopt *sopt) 2339191665Sbms{ 2340191665Sbms struct ifnet *ifp; 2341191665Sbms struct ip6_moptions *imo; 2342191665Sbms u_int ifindex; 2343191665Sbms int error; 2344191665Sbms 2345191665Sbms if (sopt->sopt_valsize != sizeof(u_int)) 2346191665Sbms return (EINVAL); 2347191665Sbms 2348191665Sbms error = sooptcopyin(sopt, &ifindex, sizeof(u_int), sizeof(u_int)); 2349191665Sbms if (error) 2350191665Sbms return (error); 2351270044Sbz if (V_if_index < ifindex) 2352191665Sbms return (EINVAL); 2353281911Sae if (ifindex == 0) 2354281911Sae ifp = NULL; 2355281911Sae else { 2356281911Sae ifp = ifnet_byindex(ifindex); 2357281911Sae if (ifp == NULL) 2358281911Sae return (EINVAL); 2359281911Sae if ((ifp->if_flags & IFF_MULTICAST) == 0) 2360281911Sae return (EADDRNOTAVAIL); 2361281911Sae } 2362191665Sbms imo = in6p_findmoptions(inp); 2363191665Sbms imo->im6o_multicast_ifp = ifp; 2364191665Sbms INP_WUNLOCK(inp); 2365191665Sbms 2366191665Sbms return (0); 2367191665Sbms} 2368191665Sbms 2369191665Sbms/* 2370191665Sbms * Atomically set source filters on a socket for an IPv6 multicast group. 2371191665Sbms * 2372191665Sbms * SMPng: NOTE: Potentially calls malloc(M_WAITOK) with Giant held. 2373191665Sbms */ 2374191665Sbmsstatic int 2375191665Sbmsin6p_set_source_filters(struct inpcb *inp, struct sockopt *sopt) 2376191665Sbms{ 2377191665Sbms struct __msfilterreq msfr; 2378191665Sbms sockunion_t *gsa; 2379191665Sbms struct ifnet *ifp; 2380191665Sbms struct in6_mfilter *imf; 2381191665Sbms struct ip6_moptions *imo; 2382191665Sbms struct in6_multi *inm; 2383191665Sbms size_t idx; 2384191665Sbms int error; 2385191665Sbms 2386191665Sbms error = sooptcopyin(sopt, &msfr, sizeof(struct __msfilterreq), 2387191665Sbms sizeof(struct __msfilterreq)); 2388191665Sbms if (error) 2389191665Sbms return (error); 2390191665Sbms 2391199523Sbms if (msfr.msfr_nsrcs > in6_mcast_maxsocksrc) 2392199523Sbms return (ENOBUFS); 2393199523Sbms 2394199523Sbms if (msfr.msfr_fmode != MCAST_EXCLUDE && 2395199523Sbms msfr.msfr_fmode != MCAST_INCLUDE) 2396191665Sbms return (EINVAL); 2397191665Sbms 2398191665Sbms if (msfr.msfr_group.ss_family != AF_INET6 || 2399191665Sbms msfr.msfr_group.ss_len != sizeof(struct sockaddr_in6)) 2400191665Sbms return (EINVAL); 2401191665Sbms 2402191665Sbms gsa = (sockunion_t *)&msfr.msfr_group; 2403191665Sbms if (!IN6_IS_ADDR_MULTICAST(&gsa->sin6.sin6_addr)) 2404191665Sbms return (EINVAL); 2405191665Sbms 2406191665Sbms gsa->sin6.sin6_port = 0; /* ignore port */ 2407191665Sbms 2408191665Sbms if (msfr.msfr_ifindex == 0 || V_if_index < msfr.msfr_ifindex) 2409191665Sbms return (EADDRNOTAVAIL); 2410191665Sbms ifp = ifnet_byindex(msfr.msfr_ifindex); 2411191665Sbms if (ifp == NULL) 2412191665Sbms return (EADDRNOTAVAIL); 2413192923Sbms (void)in6_setscope(&gsa->sin6.sin6_addr, ifp, NULL); 2414191665Sbms 2415191665Sbms /* 2416191665Sbms * Take the INP write lock. 2417191665Sbms * Check if this socket is a member of this group. 2418191665Sbms */ 2419191665Sbms imo = in6p_findmoptions(inp); 2420191665Sbms idx = im6o_match_group(imo, ifp, &gsa->sa); 2421191665Sbms if (idx == -1 || imo->im6o_mfilters == NULL) { 2422191665Sbms error = EADDRNOTAVAIL; 2423191665Sbms goto out_in6p_locked; 2424191665Sbms } 2425191665Sbms inm = imo->im6o_membership[idx]; 2426191665Sbms imf = &imo->im6o_mfilters[idx]; 2427191665Sbms 2428191665Sbms /* 2429191665Sbms * Begin state merge transaction at socket layer. 2430191665Sbms */ 2431191665Sbms INP_WLOCK_ASSERT(inp); 2432191665Sbms 2433191665Sbms imf->im6f_st[1] = msfr.msfr_fmode; 2434191665Sbms 2435191665Sbms /* 2436191665Sbms * Apply any new source filters, if present. 2437191665Sbms * Make a copy of the user-space source vector so 2438191665Sbms * that we may copy them with a single copyin. This 2439191665Sbms * allows us to deal with page faults up-front. 2440191665Sbms */ 2441191665Sbms if (msfr.msfr_nsrcs > 0) { 2442191665Sbms struct in6_msource *lims; 2443191665Sbms struct sockaddr_in6 *psin; 2444191665Sbms struct sockaddr_storage *kss, *pkss; 2445191665Sbms int i; 2446191665Sbms 2447191665Sbms INP_WUNLOCK(inp); 2448191665Sbms 2449191665Sbms CTR2(KTR_MLD, "%s: loading %lu source list entries", 2450191665Sbms __func__, (unsigned long)msfr.msfr_nsrcs); 2451191665Sbms kss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs, 2452191665Sbms M_TEMP, M_WAITOK); 2453191665Sbms error = copyin(msfr.msfr_srcs, kss, 2454191665Sbms sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs); 2455191665Sbms if (error) { 2456191665Sbms free(kss, M_TEMP); 2457191665Sbms return (error); 2458191665Sbms } 2459191665Sbms 2460191665Sbms INP_WLOCK(inp); 2461191665Sbms 2462191665Sbms /* 2463191665Sbms * Mark all source filters as UNDEFINED at t1. 2464191665Sbms * Restore new group filter mode, as im6f_leave() 2465191665Sbms * will set it to INCLUDE. 2466191665Sbms */ 2467191665Sbms im6f_leave(imf); 2468191665Sbms imf->im6f_st[1] = msfr.msfr_fmode; 2469191665Sbms 2470191665Sbms /* 2471191665Sbms * Update socket layer filters at t1, lazy-allocating 2472191665Sbms * new entries. This saves a bunch of memory at the 2473191665Sbms * cost of one RB_FIND() per source entry; duplicate 2474191665Sbms * entries in the msfr_nsrcs vector are ignored. 2475191665Sbms * If we encounter an error, rollback transaction. 2476191665Sbms * 2477191665Sbms * XXX This too could be replaced with a set-symmetric 2478191665Sbms * difference like loop to avoid walking from root 2479191665Sbms * every time, as the key space is common. 2480191665Sbms */ 2481191665Sbms for (i = 0, pkss = kss; i < msfr.msfr_nsrcs; i++, pkss++) { 2482191665Sbms psin = (struct sockaddr_in6 *)pkss; 2483191665Sbms if (psin->sin6_family != AF_INET6) { 2484191665Sbms error = EAFNOSUPPORT; 2485191665Sbms break; 2486191665Sbms } 2487191665Sbms if (psin->sin6_len != sizeof(struct sockaddr_in6)) { 2488191665Sbms error = EINVAL; 2489191665Sbms break; 2490191665Sbms } 2491192923Sbms if (IN6_IS_ADDR_MULTICAST(&psin->sin6_addr)) { 2492192923Sbms error = EINVAL; 2493192923Sbms break; 2494192923Sbms } 2495192923Sbms /* 2496192923Sbms * TODO: Validate embedded scope ID in source 2497192923Sbms * list entry against passed-in ifp, if and only 2498192923Sbms * if source list filter entry is iface or node local. 2499192923Sbms */ 2500192923Sbms in6_clearscope(&psin->sin6_addr); 2501191665Sbms error = im6f_get_source(imf, psin, &lims); 2502191665Sbms if (error) 2503191665Sbms break; 2504191665Sbms lims->im6sl_st[1] = imf->im6f_st[1]; 2505191665Sbms } 2506191665Sbms free(kss, M_TEMP); 2507191665Sbms } 2508191665Sbms 2509191665Sbms if (error) 2510191665Sbms goto out_im6f_rollback; 2511191665Sbms 2512191665Sbms INP_WLOCK_ASSERT(inp); 2513191665Sbms IN6_MULTI_LOCK(); 2514191665Sbms 2515191665Sbms /* 2516191665Sbms * Begin state merge transaction at MLD layer. 2517191665Sbms */ 2518191665Sbms CTR1(KTR_MLD, "%s: merge inm state", __func__); 2519191665Sbms error = in6m_merge(inm, imf); 2520264722Sae if (error) 2521191665Sbms CTR1(KTR_MLD, "%s: failed to merge inm state", __func__); 2522264722Sae else { 2523264722Sae CTR1(KTR_MLD, "%s: doing mld downcall", __func__); 2524264722Sae error = mld_change_state(inm, 0); 2525264722Sae if (error) 2526264722Sae CTR1(KTR_MLD, "%s: failed mld downcall", __func__); 2527191665Sbms } 2528191665Sbms 2529191665Sbms IN6_MULTI_UNLOCK(); 2530191665Sbms 2531191665Sbmsout_im6f_rollback: 2532191665Sbms if (error) 2533191665Sbms im6f_rollback(imf); 2534191665Sbms else 2535191665Sbms im6f_commit(imf); 2536191665Sbms 2537191665Sbms im6f_reap(imf); 2538191665Sbms 2539191665Sbmsout_in6p_locked: 2540191665Sbms INP_WUNLOCK(inp); 2541191665Sbms return (error); 2542191665Sbms} 2543191665Sbms 2544191665Sbms/* 2545191665Sbms * Set the IP multicast options in response to user setsockopt(). 2546191665Sbms * 2547191665Sbms * Many of the socket options handled in this function duplicate the 2548191665Sbms * functionality of socket options in the regular unicast API. However, 2549191665Sbms * it is not possible to merge the duplicate code, because the idempotence 2550191665Sbms * of the IPv6 multicast part of the BSD Sockets API must be preserved; 2551191665Sbms * the effects of these options must be treated as separate and distinct. 2552191665Sbms * 2553191665Sbms * SMPng: XXX: Unlocked read of inp_socket believed OK. 2554191665Sbms */ 2555191665Sbmsint 2556191665Sbmsip6_setmoptions(struct inpcb *inp, struct sockopt *sopt) 2557191665Sbms{ 2558191672Sbms struct ip6_moptions *im6o; 2559191665Sbms int error; 2560191665Sbms 2561191665Sbms error = 0; 2562191665Sbms 2563191665Sbms /* 2564191665Sbms * If socket is neither of type SOCK_RAW or SOCK_DGRAM, 2565191665Sbms * or is a divert socket, reject it. 2566191665Sbms */ 2567191665Sbms if (inp->inp_socket->so_proto->pr_protocol == IPPROTO_DIVERT || 2568191665Sbms (inp->inp_socket->so_proto->pr_type != SOCK_RAW && 2569191665Sbms inp->inp_socket->so_proto->pr_type != SOCK_DGRAM)) 2570191665Sbms return (EOPNOTSUPP); 2571191665Sbms 2572191665Sbms switch (sopt->sopt_name) { 2573191665Sbms case IPV6_MULTICAST_IF: 2574191665Sbms error = in6p_set_multicast_if(inp, sopt); 2575191665Sbms break; 2576191665Sbms 2577191665Sbms case IPV6_MULTICAST_HOPS: { 2578191665Sbms int hlim; 2579191665Sbms 2580191665Sbms if (sopt->sopt_valsize != sizeof(int)) { 2581191665Sbms error = EINVAL; 2582191665Sbms break; 2583191665Sbms } 2584191665Sbms error = sooptcopyin(sopt, &hlim, sizeof(hlim), sizeof(int)); 2585191665Sbms if (error) 2586191665Sbms break; 2587191665Sbms if (hlim < -1 || hlim > 255) { 2588191665Sbms error = EINVAL; 2589191665Sbms break; 2590191672Sbms } else if (hlim == -1) { 2591191672Sbms hlim = V_ip6_defmcasthlim; 2592191665Sbms } 2593191672Sbms im6o = in6p_findmoptions(inp); 2594191672Sbms im6o->im6o_multicast_hlim = hlim; 2595191665Sbms INP_WUNLOCK(inp); 2596191665Sbms break; 2597191665Sbms } 2598191665Sbms 2599191665Sbms case IPV6_MULTICAST_LOOP: { 2600191665Sbms u_int loop; 2601191665Sbms 2602191665Sbms /* 2603191665Sbms * Set the loopback flag for outgoing multicast packets. 2604191672Sbms * Must be zero or one. 2605191665Sbms */ 2606191665Sbms if (sopt->sopt_valsize != sizeof(u_int)) { 2607191665Sbms error = EINVAL; 2608191665Sbms break; 2609191665Sbms } 2610191665Sbms error = sooptcopyin(sopt, &loop, sizeof(u_int), sizeof(u_int)); 2611191665Sbms if (error) 2612191665Sbms break; 2613191672Sbms if (loop > 1) { 2614191672Sbms error = EINVAL; 2615191672Sbms break; 2616191672Sbms } 2617191672Sbms im6o = in6p_findmoptions(inp); 2618191672Sbms im6o->im6o_multicast_loop = loop; 2619191665Sbms INP_WUNLOCK(inp); 2620191665Sbms break; 2621191665Sbms } 2622191665Sbms 2623191665Sbms case IPV6_JOIN_GROUP: 2624191665Sbms case MCAST_JOIN_GROUP: 2625191665Sbms case MCAST_JOIN_SOURCE_GROUP: 2626191665Sbms error = in6p_join_group(inp, sopt); 2627191665Sbms break; 2628191665Sbms 2629191665Sbms case IPV6_LEAVE_GROUP: 2630191665Sbms case MCAST_LEAVE_GROUP: 2631191665Sbms case MCAST_LEAVE_SOURCE_GROUP: 2632191665Sbms error = in6p_leave_group(inp, sopt); 2633191665Sbms break; 2634191665Sbms 2635191665Sbms case MCAST_BLOCK_SOURCE: 2636191665Sbms case MCAST_UNBLOCK_SOURCE: 2637191665Sbms error = in6p_block_unblock_source(inp, sopt); 2638191665Sbms break; 2639191665Sbms 2640191665Sbms case IPV6_MSFILTER: 2641191665Sbms error = in6p_set_source_filters(inp, sopt); 2642191665Sbms break; 2643191665Sbms 2644191665Sbms default: 2645191665Sbms error = EOPNOTSUPP; 2646191665Sbms break; 2647191665Sbms } 2648191665Sbms 2649191665Sbms INP_UNLOCK_ASSERT(inp); 2650191665Sbms 2651191665Sbms return (error); 2652191665Sbms} 2653191665Sbms 2654191665Sbms/* 2655191665Sbms * Expose MLD's multicast filter mode and source list(s) to userland, 2656191665Sbms * keyed by (ifindex, group). 2657191665Sbms * The filter mode is written out as a uint32_t, followed by 2658191665Sbms * 0..n of struct in6_addr. 2659191665Sbms * For use by ifmcstat(8). 2660191665Sbms * SMPng: NOTE: unlocked read of ifindex space. 2661191665Sbms */ 2662191665Sbmsstatic int 2663191665Sbmssysctl_ip6_mcast_filters(SYSCTL_HANDLER_ARGS) 2664191665Sbms{ 2665192923Sbms struct in6_addr mcaddr; 2666191665Sbms struct in6_addr src; 2667191665Sbms struct ifnet *ifp; 2668191665Sbms struct ifmultiaddr *ifma; 2669191665Sbms struct in6_multi *inm; 2670191665Sbms struct ip6_msource *ims; 2671191665Sbms int *name; 2672191665Sbms int retval; 2673191665Sbms u_int namelen; 2674191665Sbms uint32_t fmode, ifindex; 2675191665Sbms#ifdef KTR 2676191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 2677191665Sbms#endif 2678191665Sbms 2679191665Sbms name = (int *)arg1; 2680191665Sbms namelen = arg2; 2681191665Sbms 2682191665Sbms if (req->newptr != NULL) 2683191665Sbms return (EPERM); 2684191665Sbms 2685191665Sbms /* int: ifindex + 4 * 32 bits of IPv6 address */ 2686191665Sbms if (namelen != 5) 2687191665Sbms return (EINVAL); 2688191665Sbms 2689191665Sbms ifindex = name[0]; 2690191665Sbms if (ifindex <= 0 || ifindex > V_if_index) { 2691191665Sbms CTR2(KTR_MLD, "%s: ifindex %u out of range", 2692191665Sbms __func__, ifindex); 2693191665Sbms return (ENOENT); 2694191665Sbms } 2695191665Sbms 2696192923Sbms memcpy(&mcaddr, &name[1], sizeof(struct in6_addr)); 2697192923Sbms if (!IN6_IS_ADDR_MULTICAST(&mcaddr)) { 2698191665Sbms CTR2(KTR_MLD, "%s: group %s is not multicast", 2699192923Sbms __func__, ip6_sprintf(ip6tbuf, &mcaddr)); 2700191665Sbms return (EINVAL); 2701191665Sbms } 2702191665Sbms 2703191665Sbms ifp = ifnet_byindex(ifindex); 2704191665Sbms if (ifp == NULL) { 2705191665Sbms CTR2(KTR_MLD, "%s: no ifp for ifindex %u", 2706191665Sbms __func__, ifindex); 2707191665Sbms return (ENOENT); 2708191665Sbms } 2709192923Sbms /* 2710192923Sbms * Internal MLD lookups require that scope/zone ID is set. 2711192923Sbms */ 2712192923Sbms (void)in6_setscope(&mcaddr, ifp, NULL); 2713191665Sbms 2714191665Sbms retval = sysctl_wire_old_buffer(req, 2715191665Sbms sizeof(uint32_t) + (in6_mcast_maxgrpsrc * sizeof(struct in6_addr))); 2716191665Sbms if (retval) 2717191665Sbms return (retval); 2718191665Sbms 2719191665Sbms IN6_MULTI_LOCK(); 2720191665Sbms 2721229621Sjhb IF_ADDR_RLOCK(ifp); 2722191665Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2723191665Sbms if (ifma->ifma_addr->sa_family != AF_INET6 || 2724191665Sbms ifma->ifma_protospec == NULL) 2725191665Sbms continue; 2726191665Sbms inm = (struct in6_multi *)ifma->ifma_protospec; 2727192923Sbms if (!IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, &mcaddr)) 2728191665Sbms continue; 2729191665Sbms fmode = inm->in6m_st[1].iss_fmode; 2730191665Sbms retval = SYSCTL_OUT(req, &fmode, sizeof(uint32_t)); 2731191665Sbms if (retval != 0) 2732191665Sbms break; 2733191665Sbms RB_FOREACH(ims, ip6_msource_tree, &inm->in6m_srcs) { 2734191665Sbms CTR2(KTR_MLD, "%s: visit node %p", __func__, ims); 2735191665Sbms /* 2736191665Sbms * Only copy-out sources which are in-mode. 2737191665Sbms */ 2738191665Sbms if (fmode != im6s_get_mode(inm, ims, 1)) { 2739191665Sbms CTR1(KTR_MLD, "%s: skip non-in-mode", 2740191665Sbms __func__); 2741191665Sbms continue; 2742191665Sbms } 2743191665Sbms src = ims->im6s_addr; 2744191665Sbms retval = SYSCTL_OUT(req, &src, 2745191665Sbms sizeof(struct in6_addr)); 2746191665Sbms if (retval != 0) 2747191665Sbms break; 2748191665Sbms } 2749191665Sbms } 2750229621Sjhb IF_ADDR_RUNLOCK(ifp); 2751191665Sbms 2752191665Sbms IN6_MULTI_UNLOCK(); 2753191665Sbms 2754191665Sbms return (retval); 2755191665Sbms} 2756191665Sbms 2757191665Sbms#ifdef KTR 2758191665Sbms 2759191665Sbmsstatic const char *in6m_modestrs[] = { "un", "in", "ex" }; 2760191665Sbms 2761191665Sbmsstatic const char * 2762191665Sbmsin6m_mode_str(const int mode) 2763191665Sbms{ 2764191665Sbms 2765191665Sbms if (mode >= MCAST_UNDEFINED && mode <= MCAST_EXCLUDE) 2766191665Sbms return (in6m_modestrs[mode]); 2767191665Sbms return ("??"); 2768191665Sbms} 2769191665Sbms 2770191665Sbmsstatic const char *in6m_statestrs[] = { 2771191665Sbms "not-member", 2772191665Sbms "silent", 2773191665Sbms "idle", 2774191665Sbms "lazy", 2775191665Sbms "sleeping", 2776191665Sbms "awakening", 2777191665Sbms "query-pending", 2778191665Sbms "sg-query-pending", 2779191665Sbms "leaving" 2780191665Sbms}; 2781191665Sbms 2782191665Sbmsstatic const char * 2783191665Sbmsin6m_state_str(const int state) 2784191665Sbms{ 2785191665Sbms 2786191665Sbms if (state >= MLD_NOT_MEMBER && state <= MLD_LEAVING_MEMBER) 2787191665Sbms return (in6m_statestrs[state]); 2788191665Sbms return ("??"); 2789191665Sbms} 2790191665Sbms 2791191665Sbms/* 2792191665Sbms * Dump an in6_multi structure to the console. 2793191665Sbms */ 2794191665Sbmsvoid 2795191665Sbmsin6m_print(const struct in6_multi *inm) 2796191665Sbms{ 2797191665Sbms int t; 2798191665Sbms char ip6tbuf[INET6_ADDRSTRLEN]; 2799191665Sbms 2800191828Skan if ((ktr_mask & KTR_MLD) == 0) 2801191665Sbms return; 2802191665Sbms 2803191665Sbms printf("%s: --- begin in6m %p ---\n", __func__, inm); 2804191665Sbms printf("addr %s ifp %p(%s) ifma %p\n", 2805191665Sbms ip6_sprintf(ip6tbuf, &inm->in6m_addr), 2806191665Sbms inm->in6m_ifp, 2807191665Sbms inm->in6m_ifp->if_xname, 2808191665Sbms inm->in6m_ifma); 2809191665Sbms printf("timer %u state %s refcount %u scq.len %u\n", 2810191665Sbms inm->in6m_timer, 2811191665Sbms in6m_state_str(inm->in6m_state), 2812191665Sbms inm->in6m_refcount, 2813191665Sbms inm->in6m_scq.ifq_len); 2814191665Sbms printf("mli %p nsrc %lu sctimer %u scrv %u\n", 2815191665Sbms inm->in6m_mli, 2816191665Sbms inm->in6m_nsrc, 2817191665Sbms inm->in6m_sctimer, 2818191665Sbms inm->in6m_scrv); 2819191665Sbms for (t = 0; t < 2; t++) { 2820191665Sbms printf("t%d: fmode %s asm %u ex %u in %u rec %u\n", t, 2821191665Sbms in6m_mode_str(inm->in6m_st[t].iss_fmode), 2822191665Sbms inm->in6m_st[t].iss_asm, 2823191665Sbms inm->in6m_st[t].iss_ex, 2824191665Sbms inm->in6m_st[t].iss_in, 2825191665Sbms inm->in6m_st[t].iss_rec); 2826191665Sbms } 2827191665Sbms printf("%s: --- end in6m %p ---\n", __func__, inm); 2828191665Sbms} 2829191665Sbms 2830191665Sbms#else /* !KTR */ 2831191665Sbms 2832191665Sbmsvoid 2833191665Sbmsin6m_print(const struct in6_multi *inm) 2834191665Sbms{ 2835191665Sbms 2836191665Sbms} 2837191665Sbms 2838191665Sbms#endif /* KTR */ 2839