in_mcast.c revision 252510
1170613Sbms/*- 2189592Sbms * Copyright (c) 2007-2009 Bruce Simpson. 3170613Sbms * Copyright (c) 2005 Robert N. M. Watson. 4170613Sbms * All rights reserved. 5170613Sbms * 6170613Sbms * Redistribution and use in source and binary forms, with or without 7170613Sbms * modification, are permitted provided that the following conditions 8170613Sbms * are met: 9170613Sbms * 1. Redistributions of source code must retain the above copyright 10170613Sbms * notice, this list of conditions and the following disclaimer. 11170613Sbms * 2. Redistributions in binary form must reproduce the above copyright 12170613Sbms * notice, this list of conditions and the following disclaimer in the 13170613Sbms * documentation and/or other materials provided with the distribution. 14170613Sbms * 3. The name of the author may not be used to endorse or promote 15170613Sbms * products derived from this software without specific prior written 16170613Sbms * permission. 17170613Sbms * 18170613Sbms * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19170613Sbms * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20170613Sbms * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21170613Sbms * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22170613Sbms * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23170613Sbms * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24170613Sbms * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25170613Sbms * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26170613Sbms * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27170613Sbms * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28170613Sbms * SUCH DAMAGE. 29170613Sbms */ 30170613Sbms 31170613Sbms/* 32170613Sbms * IPv4 multicast socket, group, and socket option processing module. 33170613Sbms */ 34170613Sbms 35170613Sbms#include <sys/cdefs.h> 36170613Sbms__FBSDID("$FreeBSD: head/sys/netinet/in_mcast.c 252510 2013-07-02 16:39:12Z hrs $"); 37170613Sbms 38170613Sbms#include <sys/param.h> 39170613Sbms#include <sys/systm.h> 40170613Sbms#include <sys/kernel.h> 41170613Sbms#include <sys/malloc.h> 42170613Sbms#include <sys/mbuf.h> 43171746Scsjp#include <sys/protosw.h> 44170613Sbms#include <sys/socket.h> 45170613Sbms#include <sys/socketvar.h> 46189592Sbms#include <sys/protosw.h> 47170613Sbms#include <sys/sysctl.h> 48189592Sbms#include <sys/ktr.h> 49228969Sjhb#include <sys/taskqueue.h> 50189592Sbms#include <sys/tree.h> 51170613Sbms 52170613Sbms#include <net/if.h> 53170613Sbms#include <net/if_dl.h> 54170613Sbms#include <net/route.h> 55185571Sbz#include <net/vnet.h> 56170613Sbms 57170613Sbms#include <netinet/in.h> 58170613Sbms#include <netinet/in_systm.h> 59170613Sbms#include <netinet/in_pcb.h> 60170613Sbms#include <netinet/in_var.h> 61170613Sbms#include <netinet/ip_var.h> 62170613Sbms#include <netinet/igmp_var.h> 63170613Sbms 64189592Sbms#ifndef KTR_IGMPV3 65191659Sbms#define KTR_IGMPV3 KTR_INET 66189592Sbms#endif 67189592Sbms 68170613Sbms#ifndef __SOCKUNION_DECLARED 69170613Sbmsunion sockunion { 70170613Sbms struct sockaddr_storage ss; 71170613Sbms struct sockaddr sa; 72170613Sbms struct sockaddr_dl sdl; 73170613Sbms struct sockaddr_in sin; 74170613Sbms}; 75170613Sbmstypedef union sockunion sockunion_t; 76170613Sbms#define __SOCKUNION_DECLARED 77170613Sbms#endif /* __SOCKUNION_DECLARED */ 78170613Sbms 79189592Sbmsstatic MALLOC_DEFINE(M_INMFILTER, "in_mfilter", 80189592Sbms "IPv4 multicast PCB-layer source filter"); 81170613Sbmsstatic MALLOC_DEFINE(M_IPMADDR, "in_multi", "IPv4 multicast group"); 82170613Sbmsstatic MALLOC_DEFINE(M_IPMOPTS, "ip_moptions", "IPv4 multicast options"); 83189592Sbmsstatic MALLOC_DEFINE(M_IPMSOURCE, "ip_msource", 84189592Sbms "IPv4 multicast IGMP-layer source filter"); 85170613Sbms 86170613Sbms/* 87189592Sbms * Locking: 88189592Sbms * - Lock order is: Giant, INP_WLOCK, IN_MULTI_LOCK, IGMP_LOCK, IF_ADDR_LOCK. 89189592Sbms * - The IF_ADDR_LOCK is implicitly taken by inm_lookup() earlier, however 90189592Sbms * it can be taken by code in net/if.c also. 91189592Sbms * - ip_moptions and in_mfilter are covered by the INP_WLOCK. 92189592Sbms * 93189592Sbms * struct in_multi is covered by IN_MULTI_LOCK. There isn't strictly 94189592Sbms * any need for in_multi itself to be virtualized -- it is bound to an ifp 95189592Sbms * anyway no matter what happens. 96170613Sbms */ 97170613Sbmsstruct mtx in_multi_mtx; 98189592SbmsMTX_SYSINIT(in_multi_mtx, &in_multi_mtx, "in_multi_mtx", MTX_DEF); 99170613Sbms 100170613Sbms/* 101170613Sbms * Functions with non-static linkage defined in this file should be 102170613Sbms * declared in in_var.h: 103189592Sbms * imo_multi_filter() 104170613Sbms * in_addmulti() 105170613Sbms * in_delmulti() 106189592Sbms * in_joingroup() 107189592Sbms * in_joingroup_locked() 108189592Sbms * in_leavegroup() 109189592Sbms * in_leavegroup_locked() 110170613Sbms * and ip_var.h: 111170613Sbms * inp_freemoptions() 112170613Sbms * inp_getmoptions() 113170613Sbms * inp_setmoptions() 114189592Sbms * 115189592Sbms * XXX: Both carp and pf need to use the legacy (*,G) KPIs in_addmulti() 116189592Sbms * and in_delmulti(). 117170613Sbms */ 118189592Sbmsstatic void imf_commit(struct in_mfilter *); 119189592Sbmsstatic int imf_get_source(struct in_mfilter *imf, 120189592Sbms const struct sockaddr_in *psin, 121189592Sbms struct in_msource **); 122189592Sbmsstatic struct in_msource * 123189592Sbms imf_graft(struct in_mfilter *, const uint8_t, 124189592Sbms const struct sockaddr_in *); 125189592Sbmsstatic void imf_leave(struct in_mfilter *); 126189592Sbmsstatic int imf_prune(struct in_mfilter *, const struct sockaddr_in *); 127189592Sbmsstatic void imf_purge(struct in_mfilter *); 128189592Sbmsstatic void imf_rollback(struct in_mfilter *); 129189592Sbmsstatic void imf_reap(struct in_mfilter *); 130170613Sbmsstatic int imo_grow(struct ip_moptions *); 131189592Sbmsstatic size_t imo_match_group(const struct ip_moptions *, 132189592Sbms const struct ifnet *, const struct sockaddr *); 133189592Sbmsstatic struct in_msource * 134189592Sbms imo_match_source(const struct ip_moptions *, const size_t, 135189592Sbms const struct sockaddr *); 136189592Sbmsstatic void ims_merge(struct ip_msource *ims, 137189592Sbms const struct in_msource *lims, const int rollback); 138189592Sbmsstatic int in_getmulti(struct ifnet *, const struct in_addr *, 139189592Sbms struct in_multi **); 140189592Sbmsstatic int inm_get_source(struct in_multi *inm, const in_addr_t haddr, 141189592Sbms const int noalloc, struct ip_msource **pims); 142189592Sbmsstatic int inm_is_ifp_detached(const struct in_multi *); 143189592Sbmsstatic int inm_merge(struct in_multi *, /*const*/ struct in_mfilter *); 144189592Sbmsstatic void inm_purge(struct in_multi *); 145189592Sbmsstatic void inm_reap(struct in_multi *); 146170613Sbmsstatic struct ip_moptions * 147170613Sbms inp_findmoptions(struct inpcb *); 148228969Sjhbstatic void inp_freemoptions_internal(struct ip_moptions *); 149228969Sjhbstatic void inp_gcmoptions(void *, int); 150170613Sbmsstatic int inp_get_source_filters(struct inpcb *, struct sockopt *); 151170613Sbmsstatic int inp_join_group(struct inpcb *, struct sockopt *); 152170613Sbmsstatic int inp_leave_group(struct inpcb *, struct sockopt *); 153189592Sbmsstatic struct ifnet * 154189592Sbms inp_lookup_mcast_ifp(const struct inpcb *, 155189592Sbms const struct sockaddr_in *, const struct in_addr); 156189592Sbmsstatic int inp_block_unblock_source(struct inpcb *, struct sockopt *); 157170613Sbmsstatic int inp_set_multicast_if(struct inpcb *, struct sockopt *); 158170613Sbmsstatic int inp_set_source_filters(struct inpcb *, struct sockopt *); 159189592Sbmsstatic int sysctl_ip_mcast_filters(SYSCTL_HANDLER_ARGS); 160170613Sbms 161227309Sedstatic SYSCTL_NODE(_net_inet_ip, OID_AUTO, mcast, CTLFLAG_RW, 0, 162227309Sed "IPv4 multicast"); 163189357Sbms 164189592Sbmsstatic u_long in_mcast_maxgrpsrc = IP_MAX_GROUP_SRC_FILTER; 165189592SbmsSYSCTL_ULONG(_net_inet_ip_mcast, OID_AUTO, maxgrpsrc, 166189592Sbms CTLFLAG_RW | CTLFLAG_TUN, &in_mcast_maxgrpsrc, 0, 167189592Sbms "Max source filters per group"); 168189592SbmsTUNABLE_ULONG("net.inet.ip.mcast.maxgrpsrc", &in_mcast_maxgrpsrc); 169189592Sbms 170189592Sbmsstatic u_long in_mcast_maxsocksrc = IP_MAX_SOCK_SRC_FILTER; 171189592SbmsSYSCTL_ULONG(_net_inet_ip_mcast, OID_AUTO, maxsocksrc, 172189592Sbms CTLFLAG_RW | CTLFLAG_TUN, &in_mcast_maxsocksrc, 0, 173189592Sbms "Max source filters per socket"); 174189592SbmsTUNABLE_ULONG("net.inet.ip.mcast.maxsocksrc", &in_mcast_maxsocksrc); 175189592Sbms 176189357Sbmsint in_mcast_loop = IP_DEFAULT_MULTICAST_LOOP; 177189357SbmsSYSCTL_INT(_net_inet_ip_mcast, OID_AUTO, loop, CTLFLAG_RW | CTLFLAG_TUN, 178189357Sbms &in_mcast_loop, 0, "Loopback multicast datagrams by default"); 179189357SbmsTUNABLE_INT("net.inet.ip.mcast.loop", &in_mcast_loop); 180189357Sbms 181227309Sedstatic SYSCTL_NODE(_net_inet_ip_mcast, OID_AUTO, filters, 182189592Sbms CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_ip_mcast_filters, 183189592Sbms "Per-interface stack-wide source filters"); 184189592Sbms 185228969Sjhbstatic STAILQ_HEAD(, ip_moptions) imo_gc_list = 186228969Sjhb STAILQ_HEAD_INITIALIZER(imo_gc_list); 187228969Sjhbstatic struct task imo_gc_task = TASK_INITIALIZER(0, inp_gcmoptions, NULL); 188228969Sjhb 189170613Sbms/* 190189592Sbms * Inline function which wraps assertions for a valid ifp. 191189592Sbms * The ifnet layer will set the ifma's ifp pointer to NULL if the ifp 192189592Sbms * is detached. 193189592Sbms */ 194189592Sbmsstatic int __inline 195189592Sbmsinm_is_ifp_detached(const struct in_multi *inm) 196189592Sbms{ 197189592Sbms struct ifnet *ifp; 198189592Sbms 199189592Sbms KASSERT(inm->inm_ifma != NULL, ("%s: no ifma", __func__)); 200189592Sbms ifp = inm->inm_ifma->ifma_ifp; 201189592Sbms if (ifp != NULL) { 202189592Sbms /* 203189592Sbms * Sanity check that netinet's notion of ifp is the 204189592Sbms * same as net's. 205189592Sbms */ 206189592Sbms KASSERT(inm->inm_ifp == ifp, ("%s: bad ifp", __func__)); 207189592Sbms } 208189592Sbms 209189592Sbms return (ifp == NULL); 210189592Sbms} 211189592Sbms 212189592Sbms/* 213189592Sbms * Initialize an in_mfilter structure to a known state at t0, t1 214189592Sbms * with an empty source filter list. 215189592Sbms */ 216189592Sbmsstatic __inline void 217189592Sbmsimf_init(struct in_mfilter *imf, const int st0, const int st1) 218189592Sbms{ 219189592Sbms memset(imf, 0, sizeof(struct in_mfilter)); 220189592Sbms RB_INIT(&imf->imf_sources); 221189592Sbms imf->imf_st[0] = st0; 222189592Sbms imf->imf_st[1] = st1; 223189592Sbms} 224189592Sbms 225189592Sbms/* 226170613Sbms * Resize the ip_moptions vector to the next power-of-two minus 1. 227170613Sbms * May be called with locks held; do not sleep. 228170613Sbms */ 229170613Sbmsstatic int 230170613Sbmsimo_grow(struct ip_moptions *imo) 231170613Sbms{ 232170613Sbms struct in_multi **nmships; 233170613Sbms struct in_multi **omships; 234170613Sbms struct in_mfilter *nmfilters; 235170613Sbms struct in_mfilter *omfilters; 236170613Sbms size_t idx; 237170613Sbms size_t newmax; 238170613Sbms size_t oldmax; 239170613Sbms 240170613Sbms nmships = NULL; 241170613Sbms nmfilters = NULL; 242170613Sbms omships = imo->imo_membership; 243170613Sbms omfilters = imo->imo_mfilters; 244170613Sbms oldmax = imo->imo_max_memberships; 245170613Sbms newmax = ((oldmax + 1) * 2) - 1; 246170613Sbms 247170613Sbms if (newmax <= IP_MAX_MEMBERSHIPS) { 248170613Sbms nmships = (struct in_multi **)realloc(omships, 249170613Sbms sizeof(struct in_multi *) * newmax, M_IPMOPTS, M_NOWAIT); 250170613Sbms nmfilters = (struct in_mfilter *)realloc(omfilters, 251189592Sbms sizeof(struct in_mfilter) * newmax, M_INMFILTER, M_NOWAIT); 252170613Sbms if (nmships != NULL && nmfilters != NULL) { 253170613Sbms /* Initialize newly allocated source filter heads. */ 254170613Sbms for (idx = oldmax; idx < newmax; idx++) { 255189592Sbms imf_init(&nmfilters[idx], MCAST_UNDEFINED, 256189592Sbms MCAST_EXCLUDE); 257170613Sbms } 258170613Sbms imo->imo_max_memberships = newmax; 259170613Sbms imo->imo_membership = nmships; 260170613Sbms imo->imo_mfilters = nmfilters; 261170613Sbms } 262170613Sbms } 263170613Sbms 264170613Sbms if (nmships == NULL || nmfilters == NULL) { 265170613Sbms if (nmships != NULL) 266170613Sbms free(nmships, M_IPMOPTS); 267170613Sbms if (nmfilters != NULL) 268189592Sbms free(nmfilters, M_INMFILTER); 269170613Sbms return (ETOOMANYREFS); 270170613Sbms } 271170613Sbms 272170613Sbms return (0); 273170613Sbms} 274170613Sbms 275170613Sbms/* 276170613Sbms * Find an IPv4 multicast group entry for this ip_moptions instance 277170613Sbms * which matches the specified group, and optionally an interface. 278170613Sbms * Return its index into the array, or -1 if not found. 279170613Sbms */ 280189592Sbmsstatic size_t 281189592Sbmsimo_match_group(const struct ip_moptions *imo, const struct ifnet *ifp, 282189592Sbms const struct sockaddr *group) 283170613Sbms{ 284189592Sbms const struct sockaddr_in *gsin; 285170613Sbms struct in_multi **pinm; 286170613Sbms int idx; 287170613Sbms int nmships; 288170613Sbms 289189592Sbms gsin = (const struct sockaddr_in *)group; 290170613Sbms 291170613Sbms /* The imo_membership array may be lazy allocated. */ 292170613Sbms if (imo->imo_membership == NULL || imo->imo_num_memberships == 0) 293170613Sbms return (-1); 294170613Sbms 295170613Sbms nmships = imo->imo_num_memberships; 296170613Sbms pinm = &imo->imo_membership[0]; 297170613Sbms for (idx = 0; idx < nmships; idx++, pinm++) { 298170613Sbms if (*pinm == NULL) 299170613Sbms continue; 300170613Sbms if ((ifp == NULL || ((*pinm)->inm_ifp == ifp)) && 301189592Sbms in_hosteq((*pinm)->inm_addr, gsin->sin_addr)) { 302170613Sbms break; 303170613Sbms } 304170613Sbms } 305170613Sbms if (idx >= nmships) 306170613Sbms idx = -1; 307170613Sbms 308170613Sbms return (idx); 309170613Sbms} 310170613Sbms 311170613Sbms/* 312189592Sbms * Find an IPv4 multicast source entry for this imo which matches 313170613Sbms * the given group index for this socket, and source address. 314189592Sbms * 315189592Sbms * NOTE: This does not check if the entry is in-mode, merely if 316189592Sbms * it exists, which may not be the desired behaviour. 317170613Sbms */ 318189592Sbmsstatic struct in_msource * 319189592Sbmsimo_match_source(const struct ip_moptions *imo, const size_t gidx, 320189592Sbms const struct sockaddr *src) 321170613Sbms{ 322189592Sbms struct ip_msource find; 323170613Sbms struct in_mfilter *imf; 324189592Sbms struct ip_msource *ims; 325189592Sbms const sockunion_t *psa; 326170613Sbms 327170613Sbms KASSERT(src->sa_family == AF_INET, ("%s: !AF_INET", __func__)); 328170613Sbms KASSERT(gidx != -1 && gidx < imo->imo_num_memberships, 329170613Sbms ("%s: invalid index %d\n", __func__, (int)gidx)); 330170613Sbms 331170613Sbms /* The imo_mfilters array may be lazy allocated. */ 332170613Sbms if (imo->imo_mfilters == NULL) 333170613Sbms return (NULL); 334170613Sbms imf = &imo->imo_mfilters[gidx]; 335170613Sbms 336189592Sbms /* Source trees are keyed in host byte order. */ 337189592Sbms psa = (const sockunion_t *)src; 338189592Sbms find.ims_haddr = ntohl(psa->sin.sin_addr.s_addr); 339189592Sbms ims = RB_FIND(ip_msource_tree, &imf->imf_sources, &find); 340189592Sbms 341189592Sbms return ((struct in_msource *)ims); 342170613Sbms} 343170613Sbms 344170613Sbms/* 345189592Sbms * Perform filtering for multicast datagrams on a socket by group and source. 346189592Sbms * 347189592Sbms * Returns 0 if a datagram should be allowed through, or various error codes 348189592Sbms * if the socket was not a member of the group, or the source was muted, etc. 349170613Sbms */ 350189592Sbmsint 351189592Sbmsimo_multi_filter(const struct ip_moptions *imo, const struct ifnet *ifp, 352189592Sbms const struct sockaddr *group, const struct sockaddr *src) 353170613Sbms{ 354189592Sbms size_t gidx; 355189592Sbms struct in_msource *ims; 356189592Sbms int mode; 357189592Sbms 358189592Sbms KASSERT(ifp != NULL, ("%s: null ifp", __func__)); 359189592Sbms 360189592Sbms gidx = imo_match_group(imo, ifp, group); 361189592Sbms if (gidx == -1) 362189592Sbms return (MCAST_NOTGMEMBER); 363189592Sbms 364189592Sbms /* 365189592Sbms * Check if the source was included in an (S,G) join. 366189592Sbms * Allow reception on exclusive memberships by default, 367189592Sbms * reject reception on inclusive memberships by default. 368189592Sbms * Exclude source only if an in-mode exclude filter exists. 369189592Sbms * Include source only if an in-mode include filter exists. 370189592Sbms * NOTE: We are comparing group state here at IGMP t1 (now) 371189592Sbms * with socket-layer t0 (since last downcall). 372189592Sbms */ 373189592Sbms mode = imo->imo_mfilters[gidx].imf_st[1]; 374189592Sbms ims = imo_match_source(imo, gidx, src); 375189592Sbms 376189592Sbms if ((ims == NULL && mode == MCAST_INCLUDE) || 377189592Sbms (ims != NULL && ims->imsl_st[0] != mode)) 378189592Sbms return (MCAST_NOTSMEMBER); 379189592Sbms 380189592Sbms return (MCAST_PASS); 381189592Sbms} 382189592Sbms 383189592Sbms/* 384189592Sbms * Find and return a reference to an in_multi record for (ifp, group), 385189592Sbms * and bump its reference count. 386189592Sbms * If one does not exist, try to allocate it, and update link-layer multicast 387189592Sbms * filters on ifp to listen for group. 388189592Sbms * Assumes the IN_MULTI lock is held across the call. 389189592Sbms * Return 0 if successful, otherwise return an appropriate error code. 390189592Sbms */ 391189592Sbmsstatic int 392189592Sbmsin_getmulti(struct ifnet *ifp, const struct in_addr *group, 393189592Sbms struct in_multi **pinm) 394189592Sbms{ 395189592Sbms struct sockaddr_in gsin; 396189592Sbms struct ifmultiaddr *ifma; 397189592Sbms struct in_ifinfo *ii; 398189592Sbms struct in_multi *inm; 399189592Sbms int error; 400170613Sbms 401189592Sbms IN_MULTI_LOCK_ASSERT(); 402170613Sbms 403189592Sbms ii = (struct in_ifinfo *)ifp->if_afdata[AF_INET]; 404170613Sbms 405189592Sbms inm = inm_lookup(ifp, *group); 406170613Sbms if (inm != NULL) { 407170613Sbms /* 408170613Sbms * If we already joined this group, just bump the 409170613Sbms * refcount and return it. 410170613Sbms */ 411170613Sbms KASSERT(inm->inm_refcount >= 1, 412170613Sbms ("%s: bad refcount %d", __func__, inm->inm_refcount)); 413170613Sbms ++inm->inm_refcount; 414189592Sbms *pinm = inm; 415189592Sbms return (0); 416189592Sbms } 417170613Sbms 418189592Sbms memset(&gsin, 0, sizeof(gsin)); 419189592Sbms gsin.sin_family = AF_INET; 420189592Sbms gsin.sin_len = sizeof(struct sockaddr_in); 421189592Sbms gsin.sin_addr = *group; 422170613Sbms 423189592Sbms /* 424189592Sbms * Check if a link-layer group is already associated 425189592Sbms * with this network-layer group on the given ifnet. 426189592Sbms */ 427189592Sbms error = if_addmulti(ifp, (struct sockaddr *)&gsin, &ifma); 428189592Sbms if (error != 0) 429189592Sbms return (error); 430189592Sbms 431189931Sbms /* XXX ifma_protospec must be covered by IF_ADDR_LOCK */ 432229621Sjhb IF_ADDR_WLOCK(ifp); 433189931Sbms 434189592Sbms /* 435189592Sbms * If something other than netinet is occupying the link-layer 436189592Sbms * group, print a meaningful error message and back out of 437189592Sbms * the allocation. 438189592Sbms * Otherwise, bump the refcount on the existing network-layer 439189592Sbms * group association and return it. 440189592Sbms */ 441189592Sbms if (ifma->ifma_protospec != NULL) { 442189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 443170613Sbms#ifdef INVARIANTS 444189592Sbms KASSERT(ifma->ifma_addr != NULL, ("%s: no ifma_addr", 445189592Sbms __func__)); 446189592Sbms KASSERT(ifma->ifma_addr->sa_family == AF_INET, 447189592Sbms ("%s: ifma not AF_INET", __func__)); 448189592Sbms KASSERT(inm != NULL, ("%s: no ifma_protospec", __func__)); 449189592Sbms if (inm->inm_ifma != ifma || inm->inm_ifp != ifp || 450189592Sbms !in_hosteq(inm->inm_addr, *group)) 451189592Sbms panic("%s: ifma %p is inconsistent with %p (%s)", 452189592Sbms __func__, ifma, inm, inet_ntoa(*group)); 453170613Sbms#endif 454189592Sbms ++inm->inm_refcount; 455189592Sbms *pinm = inm; 456229621Sjhb IF_ADDR_WUNLOCK(ifp); 457189592Sbms return (0); 458189592Sbms } 459189592Sbms 460229621Sjhb IF_ADDR_WLOCK_ASSERT(ifp); 461189931Sbms 462189592Sbms /* 463189592Sbms * A new in_multi record is needed; allocate and initialize it. 464189592Sbms * We DO NOT perform an IGMP join as the in_ layer may need to 465189592Sbms * push an initial source list down to IGMP to support SSM. 466189592Sbms * 467189592Sbms * The initial source filter state is INCLUDE, {} as per the RFC. 468189592Sbms */ 469189592Sbms inm = malloc(sizeof(*inm), M_IPMADDR, M_NOWAIT | M_ZERO); 470189592Sbms if (inm == NULL) { 471189592Sbms if_delmulti_ifma(ifma); 472229621Sjhb IF_ADDR_WUNLOCK(ifp); 473189592Sbms return (ENOMEM); 474189592Sbms } 475189592Sbms inm->inm_addr = *group; 476189592Sbms inm->inm_ifp = ifp; 477189592Sbms inm->inm_igi = ii->ii_igmp; 478189592Sbms inm->inm_ifma = ifma; 479189592Sbms inm->inm_refcount = 1; 480189592Sbms inm->inm_state = IGMP_NOT_MEMBER; 481189592Sbms 482189592Sbms /* 483189592Sbms * Pending state-changes per group are subject to a bounds check. 484189592Sbms */ 485189592Sbms IFQ_SET_MAXLEN(&inm->inm_scq, IGMP_MAX_STATE_CHANGES); 486189592Sbms 487189592Sbms inm->inm_st[0].iss_fmode = MCAST_UNDEFINED; 488189592Sbms inm->inm_st[1].iss_fmode = MCAST_UNDEFINED; 489189592Sbms RB_INIT(&inm->inm_srcs); 490189592Sbms 491189592Sbms ifma->ifma_protospec = inm; 492189592Sbms 493189592Sbms *pinm = inm; 494189592Sbms 495229621Sjhb IF_ADDR_WUNLOCK(ifp); 496189592Sbms return (0); 497189592Sbms} 498189592Sbms 499189592Sbms/* 500189592Sbms * Drop a reference to an in_multi record. 501189592Sbms * 502189592Sbms * If the refcount drops to 0, free the in_multi record and 503189592Sbms * delete the underlying link-layer membership. 504189592Sbms */ 505189592Sbmsvoid 506189592Sbmsinm_release_locked(struct in_multi *inm) 507189592Sbms{ 508189592Sbms struct ifmultiaddr *ifma; 509189592Sbms 510189592Sbms IN_MULTI_LOCK_ASSERT(); 511189592Sbms 512189592Sbms CTR2(KTR_IGMPV3, "%s: refcount is %d", __func__, inm->inm_refcount); 513189592Sbms 514189592Sbms if (--inm->inm_refcount > 0) { 515189592Sbms CTR2(KTR_IGMPV3, "%s: refcount is now %d", __func__, 516189592Sbms inm->inm_refcount); 517189592Sbms return; 518189592Sbms } 519189592Sbms 520189592Sbms CTR2(KTR_IGMPV3, "%s: freeing inm %p", __func__, inm); 521189592Sbms 522189592Sbms ifma = inm->inm_ifma; 523189592Sbms 524189931Sbms /* XXX this access is not covered by IF_ADDR_LOCK */ 525189592Sbms CTR2(KTR_IGMPV3, "%s: purging ifma %p", __func__, ifma); 526189592Sbms KASSERT(ifma->ifma_protospec == inm, 527189592Sbms ("%s: ifma_protospec != inm", __func__)); 528189592Sbms ifma->ifma_protospec = NULL; 529189592Sbms 530189592Sbms inm_purge(inm); 531189592Sbms 532189592Sbms free(inm, M_IPMADDR); 533189592Sbms 534189592Sbms if_delmulti_ifma(ifma); 535189592Sbms} 536189592Sbms 537189592Sbms/* 538189592Sbms * Clear recorded source entries for a group. 539189592Sbms * Used by the IGMP code. Caller must hold the IN_MULTI lock. 540189592Sbms * FIXME: Should reap. 541189592Sbms */ 542189592Sbmsvoid 543189592Sbmsinm_clear_recorded(struct in_multi *inm) 544189592Sbms{ 545189592Sbms struct ip_msource *ims; 546189592Sbms 547189592Sbms IN_MULTI_LOCK_ASSERT(); 548189592Sbms 549189592Sbms RB_FOREACH(ims, ip_msource_tree, &inm->inm_srcs) { 550189592Sbms if (ims->ims_stp) { 551189592Sbms ims->ims_stp = 0; 552189592Sbms --inm->inm_st[1].iss_rec; 553170613Sbms } 554189592Sbms } 555189592Sbms KASSERT(inm->inm_st[1].iss_rec == 0, 556189592Sbms ("%s: iss_rec %d not 0", __func__, inm->inm_st[1].iss_rec)); 557189592Sbms} 558170613Sbms 559189592Sbms/* 560189592Sbms * Record a source as pending for a Source-Group IGMPv3 query. 561189592Sbms * This lives here as it modifies the shared tree. 562189592Sbms * 563189592Sbms * inm is the group descriptor. 564189592Sbms * naddr is the address of the source to record in network-byte order. 565189592Sbms * 566189592Sbms * If the net.inet.igmp.sgalloc sysctl is non-zero, we will 567189592Sbms * lazy-allocate a source node in response to an SG query. 568189592Sbms * Otherwise, no allocation is performed. This saves some memory 569189592Sbms * with the trade-off that the source will not be reported to the 570189592Sbms * router if joined in the window between the query response and 571189592Sbms * the group actually being joined on the local host. 572189592Sbms * 573189592Sbms * VIMAGE: XXX: Currently the igmp_sgalloc feature has been removed. 574189592Sbms * This turns off the allocation of a recorded source entry if 575189592Sbms * the group has not been joined. 576189592Sbms * 577189592Sbms * Return 0 if the source didn't exist or was already marked as recorded. 578189592Sbms * Return 1 if the source was marked as recorded by this function. 579189592Sbms * Return <0 if any error occured (negated errno code). 580189592Sbms */ 581189592Sbmsint 582189592Sbmsinm_record_source(struct in_multi *inm, const in_addr_t naddr) 583189592Sbms{ 584189592Sbms struct ip_msource find; 585189592Sbms struct ip_msource *ims, *nims; 586189592Sbms 587189592Sbms IN_MULTI_LOCK_ASSERT(); 588189592Sbms 589189592Sbms find.ims_haddr = ntohl(naddr); 590189592Sbms ims = RB_FIND(ip_msource_tree, &inm->inm_srcs, &find); 591189592Sbms if (ims && ims->ims_stp) 592189592Sbms return (0); 593189592Sbms if (ims == NULL) { 594189592Sbms if (inm->inm_nsrc == in_mcast_maxgrpsrc) 595189592Sbms return (-ENOSPC); 596189592Sbms nims = malloc(sizeof(struct ip_msource), M_IPMSOURCE, 597189592Sbms M_NOWAIT | M_ZERO); 598189592Sbms if (nims == NULL) 599189592Sbms return (-ENOMEM); 600189592Sbms nims->ims_haddr = find.ims_haddr; 601189592Sbms RB_INSERT(ip_msource_tree, &inm->inm_srcs, nims); 602189592Sbms ++inm->inm_nsrc; 603189592Sbms ims = nims; 604189592Sbms } 605189592Sbms 606189592Sbms /* 607189592Sbms * Mark the source as recorded and update the recorded 608189592Sbms * source count. 609189592Sbms */ 610189592Sbms ++ims->ims_stp; 611189592Sbms ++inm->inm_st[1].iss_rec; 612189592Sbms 613189592Sbms return (1); 614189592Sbms} 615189592Sbms 616189592Sbms/* 617189592Sbms * Return a pointer to an in_msource owned by an in_mfilter, 618189592Sbms * given its source address. 619189592Sbms * Lazy-allocate if needed. If this is a new entry its filter state is 620189592Sbms * undefined at t0. 621189592Sbms * 622189592Sbms * imf is the filter set being modified. 623189592Sbms * haddr is the source address in *host* byte-order. 624189592Sbms * 625189592Sbms * SMPng: May be called with locks held; malloc must not block. 626189592Sbms */ 627189592Sbmsstatic int 628189592Sbmsimf_get_source(struct in_mfilter *imf, const struct sockaddr_in *psin, 629189592Sbms struct in_msource **plims) 630189592Sbms{ 631189592Sbms struct ip_msource find; 632189592Sbms struct ip_msource *ims, *nims; 633189592Sbms struct in_msource *lims; 634189592Sbms int error; 635189592Sbms 636189592Sbms error = 0; 637189592Sbms ims = NULL; 638189592Sbms lims = NULL; 639189592Sbms 640189592Sbms /* key is host byte order */ 641189592Sbms find.ims_haddr = ntohl(psin->sin_addr.s_addr); 642189592Sbms ims = RB_FIND(ip_msource_tree, &imf->imf_sources, &find); 643189592Sbms lims = (struct in_msource *)ims; 644189592Sbms if (lims == NULL) { 645189592Sbms if (imf->imf_nsrc == in_mcast_maxsocksrc) 646189592Sbms return (ENOSPC); 647189592Sbms nims = malloc(sizeof(struct in_msource), M_INMFILTER, 648189592Sbms M_NOWAIT | M_ZERO); 649189592Sbms if (nims == NULL) 650189592Sbms return (ENOMEM); 651189592Sbms lims = (struct in_msource *)nims; 652189592Sbms lims->ims_haddr = find.ims_haddr; 653189592Sbms lims->imsl_st[0] = MCAST_UNDEFINED; 654189592Sbms RB_INSERT(ip_msource_tree, &imf->imf_sources, nims); 655189592Sbms ++imf->imf_nsrc; 656189592Sbms } 657189592Sbms 658189592Sbms *plims = lims; 659189592Sbms 660189592Sbms return (error); 661189592Sbms} 662189592Sbms 663189592Sbms/* 664189592Sbms * Graft a source entry into an existing socket-layer filter set, 665189592Sbms * maintaining any required invariants and checking allocations. 666189592Sbms * 667189592Sbms * The source is marked as being in the new filter mode at t1. 668189592Sbms * 669189592Sbms * Return the pointer to the new node, otherwise return NULL. 670189592Sbms */ 671189592Sbmsstatic struct in_msource * 672189592Sbmsimf_graft(struct in_mfilter *imf, const uint8_t st1, 673189592Sbms const struct sockaddr_in *psin) 674189592Sbms{ 675189592Sbms struct ip_msource *nims; 676189592Sbms struct in_msource *lims; 677189592Sbms 678189592Sbms nims = malloc(sizeof(struct in_msource), M_INMFILTER, 679189592Sbms M_NOWAIT | M_ZERO); 680189592Sbms if (nims == NULL) 681189592Sbms return (NULL); 682189592Sbms lims = (struct in_msource *)nims; 683189592Sbms lims->ims_haddr = ntohl(psin->sin_addr.s_addr); 684189592Sbms lims->imsl_st[0] = MCAST_UNDEFINED; 685189592Sbms lims->imsl_st[1] = st1; 686189592Sbms RB_INSERT(ip_msource_tree, &imf->imf_sources, nims); 687189592Sbms ++imf->imf_nsrc; 688189592Sbms 689189592Sbms return (lims); 690189592Sbms} 691189592Sbms 692189592Sbms/* 693189592Sbms * Prune a source entry from an existing socket-layer filter set, 694189592Sbms * maintaining any required invariants and checking allocations. 695189592Sbms * 696189592Sbms * The source is marked as being left at t1, it is not freed. 697189592Sbms * 698189592Sbms * Return 0 if no error occurred, otherwise return an errno value. 699189592Sbms */ 700189592Sbmsstatic int 701189592Sbmsimf_prune(struct in_mfilter *imf, const struct sockaddr_in *psin) 702189592Sbms{ 703189592Sbms struct ip_msource find; 704189592Sbms struct ip_msource *ims; 705189592Sbms struct in_msource *lims; 706189592Sbms 707189592Sbms /* key is host byte order */ 708189592Sbms find.ims_haddr = ntohl(psin->sin_addr.s_addr); 709189592Sbms ims = RB_FIND(ip_msource_tree, &imf->imf_sources, &find); 710189592Sbms if (ims == NULL) 711189592Sbms return (ENOENT); 712189592Sbms lims = (struct in_msource *)ims; 713189592Sbms lims->imsl_st[1] = MCAST_UNDEFINED; 714189592Sbms return (0); 715189592Sbms} 716189592Sbms 717189592Sbms/* 718189592Sbms * Revert socket-layer filter set deltas at t1 to t0 state. 719189592Sbms */ 720189592Sbmsstatic void 721189592Sbmsimf_rollback(struct in_mfilter *imf) 722189592Sbms{ 723189592Sbms struct ip_msource *ims, *tims; 724189592Sbms struct in_msource *lims; 725189592Sbms 726189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &imf->imf_sources, tims) { 727189592Sbms lims = (struct in_msource *)ims; 728189592Sbms if (lims->imsl_st[0] == lims->imsl_st[1]) { 729189592Sbms /* no change at t1 */ 730189592Sbms continue; 731189592Sbms } else if (lims->imsl_st[0] != MCAST_UNDEFINED) { 732189592Sbms /* revert change to existing source at t1 */ 733189592Sbms lims->imsl_st[1] = lims->imsl_st[0]; 734189592Sbms } else { 735189592Sbms /* revert source added t1 */ 736189592Sbms CTR2(KTR_IGMPV3, "%s: free ims %p", __func__, ims); 737189592Sbms RB_REMOVE(ip_msource_tree, &imf->imf_sources, ims); 738189592Sbms free(ims, M_INMFILTER); 739189592Sbms imf->imf_nsrc--; 740189592Sbms } 741189592Sbms } 742189592Sbms imf->imf_st[1] = imf->imf_st[0]; 743189592Sbms} 744189592Sbms 745189592Sbms/* 746189592Sbms * Mark socket-layer filter set as INCLUDE {} at t1. 747189592Sbms */ 748189592Sbmsstatic void 749189592Sbmsimf_leave(struct in_mfilter *imf) 750189592Sbms{ 751189592Sbms struct ip_msource *ims; 752189592Sbms struct in_msource *lims; 753189592Sbms 754189592Sbms RB_FOREACH(ims, ip_msource_tree, &imf->imf_sources) { 755189592Sbms lims = (struct in_msource *)ims; 756189592Sbms lims->imsl_st[1] = MCAST_UNDEFINED; 757189592Sbms } 758189592Sbms imf->imf_st[1] = MCAST_INCLUDE; 759189592Sbms} 760189592Sbms 761189592Sbms/* 762189592Sbms * Mark socket-layer filter set deltas as committed. 763189592Sbms */ 764189592Sbmsstatic void 765189592Sbmsimf_commit(struct in_mfilter *imf) 766189592Sbms{ 767189592Sbms struct ip_msource *ims; 768189592Sbms struct in_msource *lims; 769189592Sbms 770189592Sbms RB_FOREACH(ims, ip_msource_tree, &imf->imf_sources) { 771189592Sbms lims = (struct in_msource *)ims; 772189592Sbms lims->imsl_st[0] = lims->imsl_st[1]; 773189592Sbms } 774189592Sbms imf->imf_st[0] = imf->imf_st[1]; 775189592Sbms} 776189592Sbms 777189592Sbms/* 778189592Sbms * Reap unreferenced sources from socket-layer filter set. 779189592Sbms */ 780189592Sbmsstatic void 781189592Sbmsimf_reap(struct in_mfilter *imf) 782189592Sbms{ 783189592Sbms struct ip_msource *ims, *tims; 784189592Sbms struct in_msource *lims; 785189592Sbms 786189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &imf->imf_sources, tims) { 787189592Sbms lims = (struct in_msource *)ims; 788189592Sbms if ((lims->imsl_st[0] == MCAST_UNDEFINED) && 789189592Sbms (lims->imsl_st[1] == MCAST_UNDEFINED)) { 790189592Sbms CTR2(KTR_IGMPV3, "%s: free lims %p", __func__, ims); 791189592Sbms RB_REMOVE(ip_msource_tree, &imf->imf_sources, ims); 792189592Sbms free(ims, M_INMFILTER); 793189592Sbms imf->imf_nsrc--; 794189592Sbms } 795189592Sbms } 796189592Sbms} 797189592Sbms 798189592Sbms/* 799189592Sbms * Purge socket-layer filter set. 800189592Sbms */ 801189592Sbmsstatic void 802189592Sbmsimf_purge(struct in_mfilter *imf) 803189592Sbms{ 804189592Sbms struct ip_msource *ims, *tims; 805189592Sbms 806189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &imf->imf_sources, tims) { 807189592Sbms CTR2(KTR_IGMPV3, "%s: free ims %p", __func__, ims); 808189592Sbms RB_REMOVE(ip_msource_tree, &imf->imf_sources, ims); 809189592Sbms free(ims, M_INMFILTER); 810189592Sbms imf->imf_nsrc--; 811189592Sbms } 812189592Sbms imf->imf_st[0] = imf->imf_st[1] = MCAST_UNDEFINED; 813189592Sbms KASSERT(RB_EMPTY(&imf->imf_sources), 814189592Sbms ("%s: imf_sources not empty", __func__)); 815189592Sbms} 816189592Sbms 817189592Sbms/* 818189592Sbms * Look up a source filter entry for a multicast group. 819189592Sbms * 820189592Sbms * inm is the group descriptor to work with. 821189592Sbms * haddr is the host-byte-order IPv4 address to look up. 822189592Sbms * noalloc may be non-zero to suppress allocation of sources. 823189592Sbms * *pims will be set to the address of the retrieved or allocated source. 824189592Sbms * 825189592Sbms * SMPng: NOTE: may be called with locks held. 826189592Sbms * Return 0 if successful, otherwise return a non-zero error code. 827189592Sbms */ 828189592Sbmsstatic int 829189592Sbmsinm_get_source(struct in_multi *inm, const in_addr_t haddr, 830189592Sbms const int noalloc, struct ip_msource **pims) 831189592Sbms{ 832189592Sbms struct ip_msource find; 833189592Sbms struct ip_msource *ims, *nims; 834189592Sbms#ifdef KTR 835189592Sbms struct in_addr ia; 836189592Sbms#endif 837189592Sbms 838189592Sbms find.ims_haddr = haddr; 839189592Sbms ims = RB_FIND(ip_msource_tree, &inm->inm_srcs, &find); 840189592Sbms if (ims == NULL && !noalloc) { 841189592Sbms if (inm->inm_nsrc == in_mcast_maxgrpsrc) 842189592Sbms return (ENOSPC); 843189592Sbms nims = malloc(sizeof(struct ip_msource), M_IPMSOURCE, 844189592Sbms M_NOWAIT | M_ZERO); 845189592Sbms if (nims == NULL) 846189592Sbms return (ENOMEM); 847189592Sbms nims->ims_haddr = haddr; 848189592Sbms RB_INSERT(ip_msource_tree, &inm->inm_srcs, nims); 849189592Sbms ++inm->inm_nsrc; 850189592Sbms ims = nims; 851189592Sbms#ifdef KTR 852189592Sbms ia.s_addr = htonl(haddr); 853189592Sbms CTR3(KTR_IGMPV3, "%s: allocated %s as %p", __func__, 854189592Sbms inet_ntoa(ia), ims); 855189592Sbms#endif 856189592Sbms } 857189592Sbms 858189592Sbms *pims = ims; 859189592Sbms return (0); 860189592Sbms} 861189592Sbms 862189592Sbms/* 863189592Sbms * Merge socket-layer source into IGMP-layer source. 864189592Sbms * If rollback is non-zero, perform the inverse of the merge. 865189592Sbms */ 866189592Sbmsstatic void 867189592Sbmsims_merge(struct ip_msource *ims, const struct in_msource *lims, 868189592Sbms const int rollback) 869189592Sbms{ 870189592Sbms int n = rollback ? -1 : 1; 871189592Sbms#ifdef KTR 872189592Sbms struct in_addr ia; 873189592Sbms 874189592Sbms ia.s_addr = htonl(ims->ims_haddr); 875189592Sbms#endif 876189592Sbms 877189592Sbms if (lims->imsl_st[0] == MCAST_EXCLUDE) { 878189592Sbms CTR3(KTR_IGMPV3, "%s: t1 ex -= %d on %s", 879189592Sbms __func__, n, inet_ntoa(ia)); 880189592Sbms ims->ims_st[1].ex -= n; 881189592Sbms } else if (lims->imsl_st[0] == MCAST_INCLUDE) { 882189592Sbms CTR3(KTR_IGMPV3, "%s: t1 in -= %d on %s", 883189592Sbms __func__, n, inet_ntoa(ia)); 884189592Sbms ims->ims_st[1].in -= n; 885189592Sbms } 886189592Sbms 887189592Sbms if (lims->imsl_st[1] == MCAST_EXCLUDE) { 888189592Sbms CTR3(KTR_IGMPV3, "%s: t1 ex += %d on %s", 889189592Sbms __func__, n, inet_ntoa(ia)); 890189592Sbms ims->ims_st[1].ex += n; 891189592Sbms } else if (lims->imsl_st[1] == MCAST_INCLUDE) { 892189592Sbms CTR3(KTR_IGMPV3, "%s: t1 in += %d on %s", 893189592Sbms __func__, n, inet_ntoa(ia)); 894189592Sbms ims->ims_st[1].in += n; 895189592Sbms } 896189592Sbms} 897189592Sbms 898189592Sbms/* 899189592Sbms * Atomically update the global in_multi state, when a membership's 900189592Sbms * filter list is being updated in any way. 901189592Sbms * 902189592Sbms * imf is the per-inpcb-membership group filter pointer. 903189592Sbms * A fake imf may be passed for in-kernel consumers. 904189592Sbms * 905189592Sbms * XXX This is a candidate for a set-symmetric-difference style loop 906189592Sbms * which would eliminate the repeated lookup from root of ims nodes, 907189592Sbms * as they share the same key space. 908189592Sbms * 909189592Sbms * If any error occurred this function will back out of refcounts 910189592Sbms * and return a non-zero value. 911189592Sbms */ 912189592Sbmsstatic int 913189592Sbmsinm_merge(struct in_multi *inm, /*const*/ struct in_mfilter *imf) 914189592Sbms{ 915189592Sbms struct ip_msource *ims, *nims; 916189592Sbms struct in_msource *lims; 917189592Sbms int schanged, error; 918189592Sbms int nsrc0, nsrc1; 919189592Sbms 920189592Sbms schanged = 0; 921189592Sbms error = 0; 922189592Sbms nsrc1 = nsrc0 = 0; 923189592Sbms 924189592Sbms /* 925189592Sbms * Update the source filters first, as this may fail. 926189592Sbms * Maintain count of in-mode filters at t0, t1. These are 927189592Sbms * used to work out if we transition into ASM mode or not. 928189592Sbms * Maintain a count of source filters whose state was 929189592Sbms * actually modified by this operation. 930189592Sbms */ 931189592Sbms RB_FOREACH(ims, ip_msource_tree, &imf->imf_sources) { 932189592Sbms lims = (struct in_msource *)ims; 933189592Sbms if (lims->imsl_st[0] == imf->imf_st[0]) nsrc0++; 934189592Sbms if (lims->imsl_st[1] == imf->imf_st[1]) nsrc1++; 935189592Sbms if (lims->imsl_st[0] == lims->imsl_st[1]) continue; 936189592Sbms error = inm_get_source(inm, lims->ims_haddr, 0, &nims); 937189592Sbms ++schanged; 938189592Sbms if (error) 939170613Sbms break; 940189592Sbms ims_merge(nims, lims, 0); 941189592Sbms } 942189592Sbms if (error) { 943189592Sbms struct ip_msource *bims; 944189592Sbms 945189592Sbms RB_FOREACH_REVERSE_FROM(ims, ip_msource_tree, nims) { 946189592Sbms lims = (struct in_msource *)ims; 947189592Sbms if (lims->imsl_st[0] == lims->imsl_st[1]) 948189592Sbms continue; 949189592Sbms (void)inm_get_source(inm, lims->ims_haddr, 1, &bims); 950189592Sbms if (bims == NULL) 951189592Sbms continue; 952189592Sbms ims_merge(bims, lims, 1); 953170613Sbms } 954189592Sbms goto out_reap; 955189592Sbms } 956170613Sbms 957189592Sbms CTR3(KTR_IGMPV3, "%s: imf filters in-mode: %d at t0, %d at t1", 958189592Sbms __func__, nsrc0, nsrc1); 959170613Sbms 960189592Sbms /* Handle transition between INCLUDE {n} and INCLUDE {} on socket. */ 961189592Sbms if (imf->imf_st[0] == imf->imf_st[1] && 962189592Sbms imf->imf_st[1] == MCAST_INCLUDE) { 963189592Sbms if (nsrc1 == 0) { 964189592Sbms CTR1(KTR_IGMPV3, "%s: --in on inm at t1", __func__); 965189592Sbms --inm->inm_st[1].iss_in; 966189592Sbms } 967189592Sbms } 968170613Sbms 969189592Sbms /* Handle filter mode transition on socket. */ 970189592Sbms if (imf->imf_st[0] != imf->imf_st[1]) { 971189592Sbms CTR3(KTR_IGMPV3, "%s: imf transition %d to %d", 972189592Sbms __func__, imf->imf_st[0], imf->imf_st[1]); 973189592Sbms 974189592Sbms if (imf->imf_st[0] == MCAST_EXCLUDE) { 975189592Sbms CTR1(KTR_IGMPV3, "%s: --ex on inm at t1", __func__); 976189592Sbms --inm->inm_st[1].iss_ex; 977189592Sbms } else if (imf->imf_st[0] == MCAST_INCLUDE) { 978189592Sbms CTR1(KTR_IGMPV3, "%s: --in on inm at t1", __func__); 979189592Sbms --inm->inm_st[1].iss_in; 980189592Sbms } 981189592Sbms 982189592Sbms if (imf->imf_st[1] == MCAST_EXCLUDE) { 983189592Sbms CTR1(KTR_IGMPV3, "%s: ex++ on inm at t1", __func__); 984189592Sbms inm->inm_st[1].iss_ex++; 985189592Sbms } else if (imf->imf_st[1] == MCAST_INCLUDE && nsrc1 > 0) { 986189592Sbms CTR1(KTR_IGMPV3, "%s: in++ on inm at t1", __func__); 987189592Sbms inm->inm_st[1].iss_in++; 988189592Sbms } 989189592Sbms } 990189592Sbms 991189592Sbms /* 992189592Sbms * Track inm filter state in terms of listener counts. 993189592Sbms * If there are any exclusive listeners, stack-wide 994189592Sbms * membership is exclusive. 995189592Sbms * Otherwise, if only inclusive listeners, stack-wide is inclusive. 996189592Sbms * If no listeners remain, state is undefined at t1, 997189592Sbms * and the IGMP lifecycle for this group should finish. 998189592Sbms */ 999189592Sbms if (inm->inm_st[1].iss_ex > 0) { 1000189592Sbms CTR1(KTR_IGMPV3, "%s: transition to EX", __func__); 1001189592Sbms inm->inm_st[1].iss_fmode = MCAST_EXCLUDE; 1002189592Sbms } else if (inm->inm_st[1].iss_in > 0) { 1003189592Sbms CTR1(KTR_IGMPV3, "%s: transition to IN", __func__); 1004189592Sbms inm->inm_st[1].iss_fmode = MCAST_INCLUDE; 1005189592Sbms } else { 1006189592Sbms CTR1(KTR_IGMPV3, "%s: transition to UNDEF", __func__); 1007189592Sbms inm->inm_st[1].iss_fmode = MCAST_UNDEFINED; 1008189592Sbms } 1009189592Sbms 1010189592Sbms /* Decrement ASM listener count on transition out of ASM mode. */ 1011189592Sbms if (imf->imf_st[0] == MCAST_EXCLUDE && nsrc0 == 0) { 1012189592Sbms if ((imf->imf_st[1] != MCAST_EXCLUDE) || 1013189592Sbms (imf->imf_st[1] == MCAST_EXCLUDE && nsrc1 > 0)) 1014189592Sbms CTR1(KTR_IGMPV3, "%s: --asm on inm at t1", __func__); 1015189592Sbms --inm->inm_st[1].iss_asm; 1016189592Sbms } 1017189592Sbms 1018189592Sbms /* Increment ASM listener count on transition to ASM mode. */ 1019189592Sbms if (imf->imf_st[1] == MCAST_EXCLUDE && nsrc1 == 0) { 1020189592Sbms CTR1(KTR_IGMPV3, "%s: asm++ on inm at t1", __func__); 1021189592Sbms inm->inm_st[1].iss_asm++; 1022189592Sbms } 1023189592Sbms 1024189592Sbms CTR3(KTR_IGMPV3, "%s: merged imf %p to inm %p", __func__, imf, inm); 1025189592Sbms inm_print(inm); 1026189592Sbms 1027189592Sbmsout_reap: 1028189592Sbms if (schanged > 0) { 1029189592Sbms CTR1(KTR_IGMPV3, "%s: sources changed; reaping", __func__); 1030189592Sbms inm_reap(inm); 1031189592Sbms } 1032189592Sbms return (error); 1033189592Sbms} 1034189592Sbms 1035189592Sbms/* 1036189592Sbms * Mark an in_multi's filter set deltas as committed. 1037189592Sbms * Called by IGMP after a state change has been enqueued. 1038189592Sbms */ 1039189592Sbmsvoid 1040189592Sbmsinm_commit(struct in_multi *inm) 1041189592Sbms{ 1042189592Sbms struct ip_msource *ims; 1043189592Sbms 1044189592Sbms CTR2(KTR_IGMPV3, "%s: commit inm %p", __func__, inm); 1045189592Sbms CTR1(KTR_IGMPV3, "%s: pre commit:", __func__); 1046189592Sbms inm_print(inm); 1047189592Sbms 1048189592Sbms RB_FOREACH(ims, ip_msource_tree, &inm->inm_srcs) { 1049189592Sbms ims->ims_st[0] = ims->ims_st[1]; 1050189592Sbms } 1051189592Sbms inm->inm_st[0] = inm->inm_st[1]; 1052189592Sbms} 1053189592Sbms 1054189592Sbms/* 1055189592Sbms * Reap unreferenced nodes from an in_multi's filter set. 1056189592Sbms */ 1057189592Sbmsstatic void 1058189592Sbmsinm_reap(struct in_multi *inm) 1059189592Sbms{ 1060189592Sbms struct ip_msource *ims, *tims; 1061189592Sbms 1062189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &inm->inm_srcs, tims) { 1063189592Sbms if (ims->ims_st[0].ex > 0 || ims->ims_st[0].in > 0 || 1064189592Sbms ims->ims_st[1].ex > 0 || ims->ims_st[1].in > 0 || 1065189592Sbms ims->ims_stp != 0) 1066189592Sbms continue; 1067189592Sbms CTR2(KTR_IGMPV3, "%s: free ims %p", __func__, ims); 1068189592Sbms RB_REMOVE(ip_msource_tree, &inm->inm_srcs, ims); 1069189592Sbms free(ims, M_IPMSOURCE); 1070189592Sbms inm->inm_nsrc--; 1071189592Sbms } 1072189592Sbms} 1073189592Sbms 1074189592Sbms/* 1075189592Sbms * Purge all source nodes from an in_multi's filter set. 1076189592Sbms */ 1077189592Sbmsstatic void 1078189592Sbmsinm_purge(struct in_multi *inm) 1079189592Sbms{ 1080189592Sbms struct ip_msource *ims, *tims; 1081189592Sbms 1082189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &inm->inm_srcs, tims) { 1083189592Sbms CTR2(KTR_IGMPV3, "%s: free ims %p", __func__, ims); 1084189592Sbms RB_REMOVE(ip_msource_tree, &inm->inm_srcs, ims); 1085189592Sbms free(ims, M_IPMSOURCE); 1086189592Sbms inm->inm_nsrc--; 1087189592Sbms } 1088189592Sbms} 1089189592Sbms 1090189592Sbms/* 1091189592Sbms * Join a multicast group; unlocked entry point. 1092189592Sbms * 1093189592Sbms * SMPng: XXX: in_joingroup() is called from in_control() when Giant 1094189592Sbms * is not held. Fortunately, ifp is unlikely to have been detached 1095189592Sbms * at this point, so we assume it's OK to recurse. 1096189592Sbms */ 1097189592Sbmsint 1098189592Sbmsin_joingroup(struct ifnet *ifp, const struct in_addr *gina, 1099189592Sbms /*const*/ struct in_mfilter *imf, struct in_multi **pinm) 1100189592Sbms{ 1101189592Sbms int error; 1102189592Sbms 1103189592Sbms IN_MULTI_LOCK(); 1104189592Sbms error = in_joingroup_locked(ifp, gina, imf, pinm); 1105170613Sbms IN_MULTI_UNLOCK(); 1106170613Sbms 1107189592Sbms return (error); 1108170613Sbms} 1109170613Sbms 1110170613Sbms/* 1111189592Sbms * Join a multicast group; real entry point. 1112170613Sbms * 1113189592Sbms * Only preserves atomicity at inm level. 1114189592Sbms * NOTE: imf argument cannot be const due to sys/tree.h limitations. 1115170613Sbms * 1116189592Sbms * If the IGMP downcall fails, the group is not joined, and an error 1117189592Sbms * code is returned. 1118170613Sbms */ 1119189592Sbmsint 1120189592Sbmsin_joingroup_locked(struct ifnet *ifp, const struct in_addr *gina, 1121189592Sbms /*const*/ struct in_mfilter *imf, struct in_multi **pinm) 1122170613Sbms{ 1123189592Sbms struct in_mfilter timf; 1124189592Sbms struct in_multi *inm; 1125189592Sbms int error; 1126170613Sbms 1127189592Sbms IN_MULTI_LOCK_ASSERT(); 1128170613Sbms 1129189592Sbms CTR4(KTR_IGMPV3, "%s: join %s on %p(%s))", __func__, 1130189592Sbms inet_ntoa(*gina), ifp, ifp->if_xname); 1131189592Sbms 1132189592Sbms error = 0; 1133189592Sbms inm = NULL; 1134189592Sbms 1135189592Sbms /* 1136189592Sbms * If no imf was specified (i.e. kernel consumer), 1137189592Sbms * fake one up and assume it is an ASM join. 1138189592Sbms */ 1139189592Sbms if (imf == NULL) { 1140189592Sbms imf_init(&timf, MCAST_UNDEFINED, MCAST_EXCLUDE); 1141189592Sbms imf = &timf; 1142170613Sbms } 1143170613Sbms 1144189592Sbms error = in_getmulti(ifp, gina, &inm); 1145189592Sbms if (error) { 1146189592Sbms CTR1(KTR_IGMPV3, "%s: in_getmulti() failure", __func__); 1147189592Sbms return (error); 1148189592Sbms } 1149189592Sbms 1150189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 1151189592Sbms error = inm_merge(inm, imf); 1152189592Sbms if (error) { 1153189592Sbms CTR1(KTR_IGMPV3, "%s: failed to merge inm state", __func__); 1154189592Sbms goto out_inm_release; 1155189592Sbms } 1156189592Sbms 1157189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 1158189592Sbms error = igmp_change_state(inm); 1159189592Sbms if (error) { 1160189592Sbms CTR1(KTR_IGMPV3, "%s: failed to update source", __func__); 1161189592Sbms goto out_inm_release; 1162189592Sbms } 1163189592Sbms 1164189592Sbmsout_inm_release: 1165189592Sbms if (error) { 1166189592Sbms CTR2(KTR_IGMPV3, "%s: dropping ref on %p", __func__, inm); 1167189592Sbms inm_release_locked(inm); 1168189592Sbms } else { 1169189592Sbms *pinm = inm; 1170189592Sbms } 1171189592Sbms 1172189592Sbms return (error); 1173189592Sbms} 1174189592Sbms 1175189592Sbms/* 1176189592Sbms * Leave a multicast group; unlocked entry point. 1177189592Sbms */ 1178189592Sbmsint 1179189592Sbmsin_leavegroup(struct in_multi *inm, /*const*/ struct in_mfilter *imf) 1180189592Sbms{ 1181189851Srwatson int error; 1182189592Sbms 1183170613Sbms IN_MULTI_LOCK(); 1184189592Sbms error = in_leavegroup_locked(inm, imf); 1185170613Sbms IN_MULTI_UNLOCK(); 1186170613Sbms 1187189592Sbms return (error); 1188170613Sbms} 1189170613Sbms 1190170613Sbms/* 1191189592Sbms * Leave a multicast group; real entry point. 1192189592Sbms * All source filters will be expunged. 1193170613Sbms * 1194189592Sbms * Only preserves atomicity at inm level. 1195189592Sbms * 1196189592Sbms * Holding the write lock for the INP which contains imf 1197189592Sbms * is highly advisable. We can't assert for it as imf does not 1198189592Sbms * contain a back-pointer to the owning inp. 1199189592Sbms * 1200189592Sbms * Note: This is not the same as inm_release(*) as this function also 1201189592Sbms * makes a state change downcall into IGMP. 1202170613Sbms */ 1203189592Sbmsint 1204189592Sbmsin_leavegroup_locked(struct in_multi *inm, /*const*/ struct in_mfilter *imf) 1205170613Sbms{ 1206189592Sbms struct in_mfilter timf; 1207189592Sbms int error; 1208170613Sbms 1209189592Sbms error = 0; 1210189592Sbms 1211170613Sbms IN_MULTI_LOCK_ASSERT(); 1212170613Sbms 1213189592Sbms CTR5(KTR_IGMPV3, "%s: leave inm %p, %s/%s, imf %p", __func__, 1214189592Sbms inm, inet_ntoa(inm->inm_addr), 1215189592Sbms (inm_is_ifp_detached(inm) ? "null" : inm->inm_ifp->if_xname), 1216189592Sbms imf); 1217170613Sbms 1218189592Sbms /* 1219189592Sbms * If no imf was specified (i.e. kernel consumer), 1220189592Sbms * fake one up and assume it is an ASM join. 1221189592Sbms */ 1222189592Sbms if (imf == NULL) { 1223189592Sbms imf_init(&timf, MCAST_EXCLUDE, MCAST_UNDEFINED); 1224189592Sbms imf = &timf; 1225189592Sbms } 1226170613Sbms 1227189592Sbms /* 1228189592Sbms * Begin state merge transaction at IGMP layer. 1229189592Sbms * 1230189592Sbms * As this particular invocation should not cause any memory 1231189592Sbms * to be allocated, and there is no opportunity to roll back 1232189592Sbms * the transaction, it MUST NOT fail. 1233189592Sbms */ 1234189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 1235189592Sbms error = inm_merge(inm, imf); 1236189592Sbms KASSERT(error == 0, ("%s: failed to merge inm state", __func__)); 1237170613Sbms 1238189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 1239252510Shrs CURVNET_SET(inm->inm_ifp->if_vnet); 1240189592Sbms error = igmp_change_state(inm); 1241252510Shrs CURVNET_RESTORE(); 1242189592Sbms if (error) 1243189592Sbms CTR1(KTR_IGMPV3, "%s: failed igmp downcall", __func__); 1244189592Sbms 1245189592Sbms CTR2(KTR_IGMPV3, "%s: dropping ref on %p", __func__, inm); 1246189592Sbms inm_release_locked(inm); 1247189592Sbms 1248189592Sbms return (error); 1249170613Sbms} 1250170613Sbms 1251189592Sbms/*#ifndef BURN_BRIDGES*/ 1252170613Sbms/* 1253189592Sbms * Join an IPv4 multicast group in (*,G) exclusive mode. 1254189592Sbms * The group must be a 224.0.0.0/24 link-scope group. 1255189592Sbms * This KPI is for legacy kernel consumers only. 1256170613Sbms */ 1257189592Sbmsstruct in_multi * 1258189592Sbmsin_addmulti(struct in_addr *ap, struct ifnet *ifp) 1259189592Sbms{ 1260189592Sbms struct in_multi *pinm; 1261189592Sbms int error; 1262189592Sbms 1263189592Sbms KASSERT(IN_LOCAL_GROUP(ntohl(ap->s_addr)), 1264189592Sbms ("%s: %s not in 224.0.0.0/24", __func__, inet_ntoa(*ap))); 1265189592Sbms 1266189592Sbms error = in_joingroup(ifp, ap, NULL, &pinm); 1267189592Sbms if (error != 0) 1268189592Sbms pinm = NULL; 1269189592Sbms 1270189592Sbms return (pinm); 1271189592Sbms} 1272189592Sbms 1273189592Sbms/* 1274189592Sbms * Leave an IPv4 multicast group, assumed to be in exclusive (*,G) mode. 1275189592Sbms * This KPI is for legacy kernel consumers only. 1276189592Sbms */ 1277189592Sbmsvoid 1278189592Sbmsin_delmulti(struct in_multi *inm) 1279189592Sbms{ 1280189592Sbms 1281189592Sbms (void)in_leavegroup(inm, NULL); 1282189592Sbms} 1283189592Sbms/*#endif*/ 1284189592Sbms 1285189592Sbms/* 1286189592Sbms * Block or unblock an ASM multicast source on an inpcb. 1287189592Sbms * This implements the delta-based API described in RFC 3678. 1288189592Sbms * 1289189592Sbms * The delta-based API applies only to exclusive-mode memberships. 1290189592Sbms * An IGMP downcall will be performed. 1291189592Sbms * 1292189592Sbms * SMPng: NOTE: Must take Giant as a join may create a new ifma. 1293189592Sbms * 1294189592Sbms * Return 0 if successful, otherwise return an appropriate error code. 1295189592Sbms */ 1296170613Sbmsstatic int 1297189592Sbmsinp_block_unblock_source(struct inpcb *inp, struct sockopt *sopt) 1298170613Sbms{ 1299170613Sbms struct group_source_req gsr; 1300170613Sbms sockunion_t *gsa, *ssa; 1301170613Sbms struct ifnet *ifp; 1302170613Sbms struct in_mfilter *imf; 1303170613Sbms struct ip_moptions *imo; 1304170613Sbms struct in_msource *ims; 1305189592Sbms struct in_multi *inm; 1306170613Sbms size_t idx; 1307189592Sbms uint16_t fmode; 1308189592Sbms int error, doblock; 1309170613Sbms 1310170613Sbms ifp = NULL; 1311170613Sbms error = 0; 1312189592Sbms doblock = 0; 1313170613Sbms 1314170613Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 1315170613Sbms gsa = (sockunion_t *)&gsr.gsr_group; 1316170613Sbms ssa = (sockunion_t *)&gsr.gsr_source; 1317170613Sbms 1318170613Sbms switch (sopt->sopt_name) { 1319170613Sbms case IP_BLOCK_SOURCE: 1320170613Sbms case IP_UNBLOCK_SOURCE: { 1321170613Sbms struct ip_mreq_source mreqs; 1322170613Sbms 1323170613Sbms error = sooptcopyin(sopt, &mreqs, 1324170613Sbms sizeof(struct ip_mreq_source), 1325170613Sbms sizeof(struct ip_mreq_source)); 1326170613Sbms if (error) 1327170613Sbms return (error); 1328170613Sbms 1329170613Sbms gsa->sin.sin_family = AF_INET; 1330170613Sbms gsa->sin.sin_len = sizeof(struct sockaddr_in); 1331170613Sbms gsa->sin.sin_addr = mreqs.imr_multiaddr; 1332170613Sbms 1333170613Sbms ssa->sin.sin_family = AF_INET; 1334170613Sbms ssa->sin.sin_len = sizeof(struct sockaddr_in); 1335170613Sbms ssa->sin.sin_addr = mreqs.imr_sourceaddr; 1336170613Sbms 1337189592Sbms if (!in_nullhost(mreqs.imr_interface)) 1338170613Sbms INADDR_TO_IFP(mreqs.imr_interface, ifp); 1339170613Sbms 1340170613Sbms if (sopt->sopt_name == IP_BLOCK_SOURCE) 1341189592Sbms doblock = 1; 1342170613Sbms 1343189592Sbms CTR3(KTR_IGMPV3, "%s: imr_interface = %s, ifp = %p", 1344189592Sbms __func__, inet_ntoa(mreqs.imr_interface), ifp); 1345170613Sbms break; 1346170613Sbms } 1347170613Sbms 1348170613Sbms case MCAST_BLOCK_SOURCE: 1349170613Sbms case MCAST_UNBLOCK_SOURCE: 1350170613Sbms error = sooptcopyin(sopt, &gsr, 1351170613Sbms sizeof(struct group_source_req), 1352170613Sbms sizeof(struct group_source_req)); 1353170613Sbms if (error) 1354170613Sbms return (error); 1355170613Sbms 1356170613Sbms if (gsa->sin.sin_family != AF_INET || 1357170613Sbms gsa->sin.sin_len != sizeof(struct sockaddr_in)) 1358170613Sbms return (EINVAL); 1359170613Sbms 1360170613Sbms if (ssa->sin.sin_family != AF_INET || 1361170613Sbms ssa->sin.sin_len != sizeof(struct sockaddr_in)) 1362170613Sbms return (EINVAL); 1363170613Sbms 1364181803Sbz if (gsr.gsr_interface == 0 || V_if_index < gsr.gsr_interface) 1365170613Sbms return (EADDRNOTAVAIL); 1366170613Sbms 1367170613Sbms ifp = ifnet_byindex(gsr.gsr_interface); 1368170613Sbms 1369170613Sbms if (sopt->sopt_name == MCAST_BLOCK_SOURCE) 1370189592Sbms doblock = 1; 1371170613Sbms break; 1372170613Sbms 1373170613Sbms default: 1374189592Sbms CTR2(KTR_IGMPV3, "%s: unknown sopt_name %d", 1375189592Sbms __func__, sopt->sopt_name); 1376170613Sbms return (EOPNOTSUPP); 1377170613Sbms break; 1378170613Sbms } 1379170613Sbms 1380170613Sbms if (!IN_MULTICAST(ntohl(gsa->sin.sin_addr.s_addr))) 1381170613Sbms return (EINVAL); 1382170613Sbms 1383170613Sbms /* 1384170613Sbms * Check if we are actually a member of this group. 1385170613Sbms */ 1386170613Sbms imo = inp_findmoptions(inp); 1387170613Sbms idx = imo_match_group(imo, ifp, &gsa->sa); 1388170613Sbms if (idx == -1 || imo->imo_mfilters == NULL) { 1389170613Sbms error = EADDRNOTAVAIL; 1390189592Sbms goto out_inp_locked; 1391170613Sbms } 1392170613Sbms 1393170613Sbms KASSERT(imo->imo_mfilters != NULL, 1394170613Sbms ("%s: imo_mfilters not allocated", __func__)); 1395170613Sbms imf = &imo->imo_mfilters[idx]; 1396189592Sbms inm = imo->imo_membership[idx]; 1397170613Sbms 1398170613Sbms /* 1399189592Sbms * Attempting to use the delta-based API on an 1400189592Sbms * non exclusive-mode membership is an error. 1401170613Sbms */ 1402189592Sbms fmode = imf->imf_st[0]; 1403189592Sbms if (fmode != MCAST_EXCLUDE) { 1404189592Sbms error = EINVAL; 1405189592Sbms goto out_inp_locked; 1406170613Sbms } 1407189592Sbms 1408189592Sbms /* 1409189592Sbms * Deal with error cases up-front: 1410189592Sbms * Asked to block, but already blocked; or 1411189592Sbms * Asked to unblock, but nothing to unblock. 1412189592Sbms * If adding a new block entry, allocate it. 1413189592Sbms */ 1414170613Sbms ims = imo_match_source(imo, idx, &ssa->sa); 1415189592Sbms if ((ims != NULL && doblock) || (ims == NULL && !doblock)) { 1416189592Sbms CTR3(KTR_IGMPV3, "%s: source %s %spresent", __func__, 1417189592Sbms inet_ntoa(ssa->sin.sin_addr), doblock ? "" : "not "); 1418189592Sbms error = EADDRNOTAVAIL; 1419189592Sbms goto out_inp_locked; 1420189592Sbms } 1421189592Sbms 1422189592Sbms INP_WLOCK_ASSERT(inp); 1423189592Sbms 1424189592Sbms /* 1425189592Sbms * Begin state merge transaction at socket layer. 1426189592Sbms */ 1427189592Sbms if (doblock) { 1428189592Sbms CTR2(KTR_IGMPV3, "%s: %s source", __func__, "block"); 1429189592Sbms ims = imf_graft(imf, fmode, &ssa->sin); 1430189592Sbms if (ims == NULL) 1431189592Sbms error = ENOMEM; 1432170613Sbms } else { 1433189592Sbms CTR2(KTR_IGMPV3, "%s: %s source", __func__, "allow"); 1434189592Sbms error = imf_prune(imf, &ssa->sin); 1435170613Sbms } 1436170613Sbms 1437189592Sbms if (error) { 1438189592Sbms CTR1(KTR_IGMPV3, "%s: merge imf state failed", __func__); 1439189592Sbms goto out_imf_rollback; 1440189592Sbms } 1441189592Sbms 1442189592Sbms /* 1443189592Sbms * Begin state merge transaction at IGMP layer. 1444189592Sbms */ 1445189592Sbms IN_MULTI_LOCK(); 1446189592Sbms 1447189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 1448189592Sbms error = inm_merge(inm, imf); 1449189592Sbms if (error) { 1450189592Sbms CTR1(KTR_IGMPV3, "%s: failed to merge inm state", __func__); 1451189592Sbms goto out_imf_rollback; 1452189592Sbms } 1453189592Sbms 1454189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 1455189592Sbms error = igmp_change_state(inm); 1456189592Sbms if (error) 1457189592Sbms CTR1(KTR_IGMPV3, "%s: failed igmp downcall", __func__); 1458189592Sbms 1459189592Sbms IN_MULTI_UNLOCK(); 1460189592Sbms 1461189592Sbmsout_imf_rollback: 1462189592Sbms if (error) 1463189592Sbms imf_rollback(imf); 1464189592Sbms else 1465189592Sbms imf_commit(imf); 1466189592Sbms 1467189592Sbms imf_reap(imf); 1468189592Sbms 1469189592Sbmsout_inp_locked: 1470178285Srwatson INP_WUNLOCK(inp); 1471170613Sbms return (error); 1472170613Sbms} 1473170613Sbms 1474170613Sbms/* 1475170613Sbms * Given an inpcb, return its multicast options structure pointer. Accepts 1476170613Sbms * an unlocked inpcb pointer, but will return it locked. May sleep. 1477189592Sbms * 1478189592Sbms * SMPng: NOTE: Potentially calls malloc(M_WAITOK) with Giant held. 1479189592Sbms * SMPng: NOTE: Returns with the INP write lock held. 1480170613Sbms */ 1481170613Sbmsstatic struct ip_moptions * 1482170613Sbmsinp_findmoptions(struct inpcb *inp) 1483170613Sbms{ 1484170613Sbms struct ip_moptions *imo; 1485170613Sbms struct in_multi **immp; 1486170613Sbms struct in_mfilter *imfp; 1487170613Sbms size_t idx; 1488170613Sbms 1489178285Srwatson INP_WLOCK(inp); 1490170613Sbms if (inp->inp_moptions != NULL) 1491170613Sbms return (inp->inp_moptions); 1492170613Sbms 1493178285Srwatson INP_WUNLOCK(inp); 1494170613Sbms 1495189592Sbms imo = malloc(sizeof(*imo), M_IPMOPTS, M_WAITOK); 1496189592Sbms immp = malloc(sizeof(*immp) * IP_MIN_MEMBERSHIPS, M_IPMOPTS, 1497189592Sbms M_WAITOK | M_ZERO); 1498189592Sbms imfp = malloc(sizeof(struct in_mfilter) * IP_MIN_MEMBERSHIPS, 1499189592Sbms M_INMFILTER, M_WAITOK); 1500170613Sbms 1501170613Sbms imo->imo_multicast_ifp = NULL; 1502170613Sbms imo->imo_multicast_addr.s_addr = INADDR_ANY; 1503170613Sbms imo->imo_multicast_vif = -1; 1504170613Sbms imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; 1505189357Sbms imo->imo_multicast_loop = in_mcast_loop; 1506170613Sbms imo->imo_num_memberships = 0; 1507170613Sbms imo->imo_max_memberships = IP_MIN_MEMBERSHIPS; 1508170613Sbms imo->imo_membership = immp; 1509170613Sbms 1510170613Sbms /* Initialize per-group source filters. */ 1511189592Sbms for (idx = 0; idx < IP_MIN_MEMBERSHIPS; idx++) 1512189592Sbms imf_init(&imfp[idx], MCAST_UNDEFINED, MCAST_EXCLUDE); 1513170613Sbms imo->imo_mfilters = imfp; 1514170613Sbms 1515178285Srwatson INP_WLOCK(inp); 1516170613Sbms if (inp->inp_moptions != NULL) { 1517189592Sbms free(imfp, M_INMFILTER); 1518170613Sbms free(immp, M_IPMOPTS); 1519170613Sbms free(imo, M_IPMOPTS); 1520170613Sbms return (inp->inp_moptions); 1521170613Sbms } 1522170613Sbms inp->inp_moptions = imo; 1523170613Sbms return (imo); 1524170613Sbms} 1525170613Sbms 1526170613Sbms/* 1527228969Sjhb * Discard the IP multicast options (and source filters). To minimize 1528228969Sjhb * the amount of work done while holding locks such as the INP's 1529228969Sjhb * pcbinfo lock (which is used in the receive path), the free 1530228969Sjhb * operation is performed asynchronously in a separate task. 1531189592Sbms * 1532189592Sbms * SMPng: NOTE: assumes INP write lock is held. 1533170613Sbms */ 1534170613Sbmsvoid 1535170613Sbmsinp_freemoptions(struct ip_moptions *imo) 1536170613Sbms{ 1537228969Sjhb 1538228969Sjhb KASSERT(imo != NULL, ("%s: ip_moptions is NULL", __func__)); 1539228969Sjhb IN_MULTI_LOCK(); 1540228969Sjhb STAILQ_INSERT_TAIL(&imo_gc_list, imo, imo_link); 1541228969Sjhb IN_MULTI_UNLOCK(); 1542228969Sjhb taskqueue_enqueue(taskqueue_thread, &imo_gc_task); 1543228969Sjhb} 1544228969Sjhb 1545228969Sjhbstatic void 1546228969Sjhbinp_freemoptions_internal(struct ip_moptions *imo) 1547228969Sjhb{ 1548170613Sbms struct in_mfilter *imf; 1549170613Sbms size_t idx, nmships; 1550170613Sbms 1551170613Sbms nmships = imo->imo_num_memberships; 1552170613Sbms for (idx = 0; idx < nmships; ++idx) { 1553189592Sbms imf = imo->imo_mfilters ? &imo->imo_mfilters[idx] : NULL; 1554189592Sbms if (imf) 1555189592Sbms imf_leave(imf); 1556189592Sbms (void)in_leavegroup(imo->imo_membership[idx], imf); 1557189592Sbms if (imf) 1558189592Sbms imf_purge(imf); 1559170613Sbms } 1560170613Sbms 1561189592Sbms if (imo->imo_mfilters) 1562189592Sbms free(imo->imo_mfilters, M_INMFILTER); 1563170613Sbms free(imo->imo_membership, M_IPMOPTS); 1564170613Sbms free(imo, M_IPMOPTS); 1565170613Sbms} 1566170613Sbms 1567228969Sjhbstatic void 1568228969Sjhbinp_gcmoptions(void *context, int pending) 1569228969Sjhb{ 1570228969Sjhb struct ip_moptions *imo; 1571228969Sjhb 1572228969Sjhb IN_MULTI_LOCK(); 1573228969Sjhb while (!STAILQ_EMPTY(&imo_gc_list)) { 1574228969Sjhb imo = STAILQ_FIRST(&imo_gc_list); 1575228969Sjhb STAILQ_REMOVE_HEAD(&imo_gc_list, imo_link); 1576228969Sjhb IN_MULTI_UNLOCK(); 1577228969Sjhb inp_freemoptions_internal(imo); 1578228969Sjhb IN_MULTI_LOCK(); 1579228969Sjhb } 1580228969Sjhb IN_MULTI_UNLOCK(); 1581228969Sjhb} 1582228969Sjhb 1583170613Sbms/* 1584170613Sbms * Atomically get source filters on a socket for an IPv4 multicast group. 1585170613Sbms * Called with INP lock held; returns with lock released. 1586170613Sbms */ 1587170613Sbmsstatic int 1588170613Sbmsinp_get_source_filters(struct inpcb *inp, struct sockopt *sopt) 1589170613Sbms{ 1590170613Sbms struct __msfilterreq msfr; 1591170613Sbms sockunion_t *gsa; 1592170613Sbms struct ifnet *ifp; 1593170613Sbms struct ip_moptions *imo; 1594170613Sbms struct in_mfilter *imf; 1595189592Sbms struct ip_msource *ims; 1596189592Sbms struct in_msource *lims; 1597189592Sbms struct sockaddr_in *psin; 1598170613Sbms struct sockaddr_storage *ptss; 1599170613Sbms struct sockaddr_storage *tss; 1600170613Sbms int error; 1601189592Sbms size_t idx, nsrcs, ncsrcs; 1602170613Sbms 1603178285Srwatson INP_WLOCK_ASSERT(inp); 1604170613Sbms 1605170613Sbms imo = inp->inp_moptions; 1606170613Sbms KASSERT(imo != NULL, ("%s: null ip_moptions", __func__)); 1607170613Sbms 1608178285Srwatson INP_WUNLOCK(inp); 1609170613Sbms 1610170613Sbms error = sooptcopyin(sopt, &msfr, sizeof(struct __msfilterreq), 1611170613Sbms sizeof(struct __msfilterreq)); 1612170613Sbms if (error) 1613170613Sbms return (error); 1614170613Sbms 1615181803Sbz if (msfr.msfr_ifindex == 0 || V_if_index < msfr.msfr_ifindex) 1616170613Sbms return (EINVAL); 1617170613Sbms 1618170613Sbms ifp = ifnet_byindex(msfr.msfr_ifindex); 1619170613Sbms if (ifp == NULL) 1620170613Sbms return (EINVAL); 1621170613Sbms 1622178285Srwatson INP_WLOCK(inp); 1623170613Sbms 1624170613Sbms /* 1625170613Sbms * Lookup group on the socket. 1626170613Sbms */ 1627170613Sbms gsa = (sockunion_t *)&msfr.msfr_group; 1628170613Sbms idx = imo_match_group(imo, ifp, &gsa->sa); 1629170613Sbms if (idx == -1 || imo->imo_mfilters == NULL) { 1630178285Srwatson INP_WUNLOCK(inp); 1631170613Sbms return (EADDRNOTAVAIL); 1632170613Sbms } 1633170613Sbms imf = &imo->imo_mfilters[idx]; 1634170613Sbms 1635170613Sbms /* 1636189592Sbms * Ignore memberships which are in limbo. 1637189592Sbms */ 1638189592Sbms if (imf->imf_st[1] == MCAST_UNDEFINED) { 1639189592Sbms INP_WUNLOCK(inp); 1640189592Sbms return (EAGAIN); 1641189592Sbms } 1642189592Sbms msfr.msfr_fmode = imf->imf_st[1]; 1643189592Sbms 1644189592Sbms /* 1645170613Sbms * If the user specified a buffer, copy out the source filter 1646170613Sbms * entries to userland gracefully. 1647189592Sbms * We only copy out the number of entries which userland 1648189592Sbms * has asked for, but we always tell userland how big the 1649189592Sbms * buffer really needs to be. 1650170613Sbms */ 1651170613Sbms tss = NULL; 1652170613Sbms if (msfr.msfr_srcs != NULL && msfr.msfr_nsrcs > 0) { 1653184214Sdes tss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs, 1654189592Sbms M_TEMP, M_NOWAIT | M_ZERO); 1655170613Sbms if (tss == NULL) { 1656189592Sbms INP_WUNLOCK(inp); 1657189592Sbms return (ENOBUFS); 1658170613Sbms } 1659170613Sbms } 1660170613Sbms 1661189592Sbms /* 1662189592Sbms * Count number of sources in-mode at t0. 1663189592Sbms * If buffer space exists and remains, copy out source entries. 1664189592Sbms */ 1665189592Sbms nsrcs = msfr.msfr_nsrcs; 1666189592Sbms ncsrcs = 0; 1667189592Sbms ptss = tss; 1668189592Sbms RB_FOREACH(ims, ip_msource_tree, &imf->imf_sources) { 1669189592Sbms lims = (struct in_msource *)ims; 1670189592Sbms if (lims->imsl_st[0] == MCAST_UNDEFINED || 1671189592Sbms lims->imsl_st[0] != imf->imf_st[0]) 1672189592Sbms continue; 1673189592Sbms ++ncsrcs; 1674191659Sbms if (tss != NULL && nsrcs > 0) { 1675191659Sbms psin = (struct sockaddr_in *)ptss; 1676189592Sbms psin->sin_family = AF_INET; 1677189592Sbms psin->sin_len = sizeof(struct sockaddr_in); 1678189592Sbms psin->sin_addr.s_addr = htonl(lims->ims_haddr); 1679191659Sbms psin->sin_port = 0; 1680191659Sbms ++ptss; 1681191659Sbms --nsrcs; 1682189592Sbms } 1683189592Sbms } 1684189592Sbms 1685178285Srwatson INP_WUNLOCK(inp); 1686170613Sbms 1687170613Sbms if (tss != NULL) { 1688170613Sbms error = copyout(tss, msfr.msfr_srcs, 1689170613Sbms sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs); 1690184205Sdes free(tss, M_TEMP); 1691189592Sbms if (error) 1692189592Sbms return (error); 1693170613Sbms } 1694170613Sbms 1695189592Sbms msfr.msfr_nsrcs = ncsrcs; 1696170613Sbms error = sooptcopyout(sopt, &msfr, sizeof(struct __msfilterreq)); 1697170613Sbms 1698170613Sbms return (error); 1699170613Sbms} 1700170613Sbms 1701170613Sbms/* 1702170613Sbms * Return the IP multicast options in response to user getsockopt(). 1703170613Sbms */ 1704170613Sbmsint 1705170613Sbmsinp_getmoptions(struct inpcb *inp, struct sockopt *sopt) 1706170613Sbms{ 1707170613Sbms struct ip_mreqn mreqn; 1708170613Sbms struct ip_moptions *imo; 1709170613Sbms struct ifnet *ifp; 1710170613Sbms struct in_ifaddr *ia; 1711170613Sbms int error, optval; 1712170613Sbms u_char coptval; 1713170613Sbms 1714178285Srwatson INP_WLOCK(inp); 1715170613Sbms imo = inp->inp_moptions; 1716171746Scsjp /* 1717171746Scsjp * If socket is neither of type SOCK_RAW or SOCK_DGRAM, 1718171746Scsjp * or is a divert socket, reject it. 1719171746Scsjp */ 1720171746Scsjp if (inp->inp_socket->so_proto->pr_protocol == IPPROTO_DIVERT || 1721171746Scsjp (inp->inp_socket->so_proto->pr_type != SOCK_RAW && 1722171746Scsjp inp->inp_socket->so_proto->pr_type != SOCK_DGRAM)) { 1723178285Srwatson INP_WUNLOCK(inp); 1724171746Scsjp return (EOPNOTSUPP); 1725171746Scsjp } 1726170613Sbms 1727170613Sbms error = 0; 1728170613Sbms switch (sopt->sopt_name) { 1729170613Sbms case IP_MULTICAST_VIF: 1730170613Sbms if (imo != NULL) 1731170613Sbms optval = imo->imo_multicast_vif; 1732170613Sbms else 1733170613Sbms optval = -1; 1734178285Srwatson INP_WUNLOCK(inp); 1735170613Sbms error = sooptcopyout(sopt, &optval, sizeof(int)); 1736170613Sbms break; 1737170613Sbms 1738170613Sbms case IP_MULTICAST_IF: 1739170613Sbms memset(&mreqn, 0, sizeof(struct ip_mreqn)); 1740170613Sbms if (imo != NULL) { 1741170613Sbms ifp = imo->imo_multicast_ifp; 1742189592Sbms if (!in_nullhost(imo->imo_multicast_addr)) { 1743170613Sbms mreqn.imr_address = imo->imo_multicast_addr; 1744170613Sbms } else if (ifp != NULL) { 1745170613Sbms mreqn.imr_ifindex = ifp->if_index; 1746170613Sbms IFP_TO_IA(ifp, ia); 1747170613Sbms if (ia != NULL) { 1748170613Sbms mreqn.imr_address = 1749170613Sbms IA_SIN(ia)->sin_addr; 1750194760Srwatson ifa_free(&ia->ia_ifa); 1751170613Sbms } 1752170613Sbms } 1753170613Sbms } 1754178285Srwatson INP_WUNLOCK(inp); 1755170613Sbms if (sopt->sopt_valsize == sizeof(struct ip_mreqn)) { 1756170613Sbms error = sooptcopyout(sopt, &mreqn, 1757170613Sbms sizeof(struct ip_mreqn)); 1758170613Sbms } else { 1759170613Sbms error = sooptcopyout(sopt, &mreqn.imr_address, 1760170613Sbms sizeof(struct in_addr)); 1761170613Sbms } 1762170613Sbms break; 1763170613Sbms 1764170613Sbms case IP_MULTICAST_TTL: 1765170613Sbms if (imo == 0) 1766170613Sbms optval = coptval = IP_DEFAULT_MULTICAST_TTL; 1767170613Sbms else 1768170613Sbms optval = coptval = imo->imo_multicast_ttl; 1769178285Srwatson INP_WUNLOCK(inp); 1770170613Sbms if (sopt->sopt_valsize == sizeof(u_char)) 1771170613Sbms error = sooptcopyout(sopt, &coptval, sizeof(u_char)); 1772170613Sbms else 1773170613Sbms error = sooptcopyout(sopt, &optval, sizeof(int)); 1774170613Sbms break; 1775170613Sbms 1776170613Sbms case IP_MULTICAST_LOOP: 1777170613Sbms if (imo == 0) 1778170613Sbms optval = coptval = IP_DEFAULT_MULTICAST_LOOP; 1779170613Sbms else 1780170613Sbms optval = coptval = imo->imo_multicast_loop; 1781178285Srwatson INP_WUNLOCK(inp); 1782170613Sbms if (sopt->sopt_valsize == sizeof(u_char)) 1783170613Sbms error = sooptcopyout(sopt, &coptval, sizeof(u_char)); 1784170613Sbms else 1785170613Sbms error = sooptcopyout(sopt, &optval, sizeof(int)); 1786170613Sbms break; 1787170613Sbms 1788170613Sbms case IP_MSFILTER: 1789170613Sbms if (imo == NULL) { 1790170613Sbms error = EADDRNOTAVAIL; 1791178285Srwatson INP_WUNLOCK(inp); 1792170613Sbms } else { 1793170613Sbms error = inp_get_source_filters(inp, sopt); 1794170613Sbms } 1795170613Sbms break; 1796170613Sbms 1797170613Sbms default: 1798178285Srwatson INP_WUNLOCK(inp); 1799170613Sbms error = ENOPROTOOPT; 1800170613Sbms break; 1801170613Sbms } 1802170613Sbms 1803170613Sbms INP_UNLOCK_ASSERT(inp); 1804170613Sbms 1805170613Sbms return (error); 1806170613Sbms} 1807170613Sbms 1808170613Sbms/* 1809189592Sbms * Look up the ifnet to use for a multicast group membership, 1810189592Sbms * given the IPv4 address of an interface, and the IPv4 group address. 1811189592Sbms * 1812189592Sbms * This routine exists to support legacy multicast applications 1813189592Sbms * which do not understand that multicast memberships are scoped to 1814189592Sbms * specific physical links in the networking stack, or which need 1815189592Sbms * to join link-scope groups before IPv4 addresses are configured. 1816189592Sbms * 1817189592Sbms * If inp is non-NULL, use this socket's current FIB number for any 1818189592Sbms * required FIB lookup. 1819189592Sbms * If ina is INADDR_ANY, look up the group address in the unicast FIB, 1820189592Sbms * and use its ifp; usually, this points to the default next-hop. 1821189592Sbms * 1822189592Sbms * If the FIB lookup fails, attempt to use the first non-loopback 1823189592Sbms * interface with multicast capability in the system as a 1824189592Sbms * last resort. The legacy IPv4 ASM API requires that we do 1825189592Sbms * this in order to allow groups to be joined when the routing 1826189592Sbms * table has not yet been populated during boot. 1827189592Sbms * 1828189592Sbms * Returns NULL if no ifp could be found. 1829189592Sbms * 1830189592Sbms * SMPng: TODO: Acquire the appropriate locks for INADDR_TO_IFP. 1831189592Sbms * FUTURE: Implement IPv4 source-address selection. 1832189592Sbms */ 1833189592Sbmsstatic struct ifnet * 1834189592Sbmsinp_lookup_mcast_ifp(const struct inpcb *inp, 1835189592Sbms const struct sockaddr_in *gsin, const struct in_addr ina) 1836189592Sbms{ 1837189592Sbms struct ifnet *ifp; 1838189592Sbms 1839189592Sbms KASSERT(gsin->sin_family == AF_INET, ("%s: not AF_INET", __func__)); 1840189592Sbms KASSERT(IN_MULTICAST(ntohl(gsin->sin_addr.s_addr)), 1841189592Sbms ("%s: not multicast", __func__)); 1842189592Sbms 1843189592Sbms ifp = NULL; 1844189592Sbms if (!in_nullhost(ina)) { 1845189592Sbms INADDR_TO_IFP(ina, ifp); 1846189592Sbms } else { 1847189592Sbms struct route ro; 1848189592Sbms 1849189592Sbms ro.ro_rt = NULL; 1850189592Sbms memcpy(&ro.ro_dst, gsin, sizeof(struct sockaddr_in)); 1851189592Sbms in_rtalloc_ign(&ro, 0, inp ? inp->inp_inc.inc_fibnum : 0); 1852189592Sbms if (ro.ro_rt != NULL) { 1853189592Sbms ifp = ro.ro_rt->rt_ifp; 1854189592Sbms KASSERT(ifp != NULL, ("%s: null ifp", __func__)); 1855189592Sbms RTFREE(ro.ro_rt); 1856189592Sbms } else { 1857189592Sbms struct in_ifaddr *ia; 1858189592Sbms struct ifnet *mifp; 1859189592Sbms 1860189592Sbms mifp = NULL; 1861194951Srwatson IN_IFADDR_RLOCK(); 1862189592Sbms TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 1863189592Sbms mifp = ia->ia_ifp; 1864189592Sbms if (!(mifp->if_flags & IFF_LOOPBACK) && 1865189592Sbms (mifp->if_flags & IFF_MULTICAST)) { 1866189592Sbms ifp = mifp; 1867189592Sbms break; 1868189592Sbms } 1869189592Sbms } 1870194951Srwatson IN_IFADDR_RUNLOCK(); 1871189592Sbms } 1872189592Sbms } 1873189592Sbms 1874189592Sbms return (ifp); 1875189592Sbms} 1876189592Sbms 1877189592Sbms/* 1878170613Sbms * Join an IPv4 multicast group, possibly with a source. 1879170613Sbms */ 1880170613Sbmsstatic int 1881170613Sbmsinp_join_group(struct inpcb *inp, struct sockopt *sopt) 1882170613Sbms{ 1883170613Sbms struct group_source_req gsr; 1884170613Sbms sockunion_t *gsa, *ssa; 1885170613Sbms struct ifnet *ifp; 1886170613Sbms struct in_mfilter *imf; 1887170613Sbms struct ip_moptions *imo; 1888170613Sbms struct in_multi *inm; 1889189592Sbms struct in_msource *lims; 1890170613Sbms size_t idx; 1891189592Sbms int error, is_new; 1892170613Sbms 1893170613Sbms ifp = NULL; 1894189592Sbms imf = NULL; 1895197136Sbms lims = NULL; 1896170613Sbms error = 0; 1897189592Sbms is_new = 0; 1898170613Sbms 1899170613Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 1900170613Sbms gsa = (sockunion_t *)&gsr.gsr_group; 1901170613Sbms gsa->ss.ss_family = AF_UNSPEC; 1902170613Sbms ssa = (sockunion_t *)&gsr.gsr_source; 1903170613Sbms ssa->ss.ss_family = AF_UNSPEC; 1904170613Sbms 1905170613Sbms switch (sopt->sopt_name) { 1906170613Sbms case IP_ADD_MEMBERSHIP: 1907170613Sbms case IP_ADD_SOURCE_MEMBERSHIP: { 1908170613Sbms struct ip_mreq_source mreqs; 1909170613Sbms 1910170613Sbms if (sopt->sopt_name == IP_ADD_MEMBERSHIP) { 1911170613Sbms error = sooptcopyin(sopt, &mreqs, 1912170613Sbms sizeof(struct ip_mreq), 1913170613Sbms sizeof(struct ip_mreq)); 1914170613Sbms /* 1915170613Sbms * Do argument switcharoo from ip_mreq into 1916170613Sbms * ip_mreq_source to avoid using two instances. 1917170613Sbms */ 1918170613Sbms mreqs.imr_interface = mreqs.imr_sourceaddr; 1919170613Sbms mreqs.imr_sourceaddr.s_addr = INADDR_ANY; 1920170613Sbms } else if (sopt->sopt_name == IP_ADD_SOURCE_MEMBERSHIP) { 1921170613Sbms error = sooptcopyin(sopt, &mreqs, 1922170613Sbms sizeof(struct ip_mreq_source), 1923170613Sbms sizeof(struct ip_mreq_source)); 1924170613Sbms } 1925170613Sbms if (error) 1926170613Sbms return (error); 1927170613Sbms 1928170613Sbms gsa->sin.sin_family = AF_INET; 1929170613Sbms gsa->sin.sin_len = sizeof(struct sockaddr_in); 1930170613Sbms gsa->sin.sin_addr = mreqs.imr_multiaddr; 1931170613Sbms 1932170613Sbms if (sopt->sopt_name == IP_ADD_SOURCE_MEMBERSHIP) { 1933170613Sbms ssa->sin.sin_family = AF_INET; 1934170613Sbms ssa->sin.sin_len = sizeof(struct sockaddr_in); 1935170613Sbms ssa->sin.sin_addr = mreqs.imr_sourceaddr; 1936170613Sbms } 1937170613Sbms 1938196932Ssyrinx if (!IN_MULTICAST(ntohl(gsa->sin.sin_addr.s_addr))) 1939196932Ssyrinx return (EINVAL); 1940196932Ssyrinx 1941189592Sbms ifp = inp_lookup_mcast_ifp(inp, &gsa->sin, 1942189592Sbms mreqs.imr_interface); 1943189592Sbms CTR3(KTR_IGMPV3, "%s: imr_interface = %s, ifp = %p", 1944189592Sbms __func__, inet_ntoa(mreqs.imr_interface), ifp); 1945170613Sbms break; 1946170613Sbms } 1947170613Sbms 1948170613Sbms case MCAST_JOIN_GROUP: 1949170613Sbms case MCAST_JOIN_SOURCE_GROUP: 1950170613Sbms if (sopt->sopt_name == MCAST_JOIN_GROUP) { 1951170613Sbms error = sooptcopyin(sopt, &gsr, 1952170613Sbms sizeof(struct group_req), 1953170613Sbms sizeof(struct group_req)); 1954170613Sbms } else if (sopt->sopt_name == MCAST_JOIN_SOURCE_GROUP) { 1955170613Sbms error = sooptcopyin(sopt, &gsr, 1956170613Sbms sizeof(struct group_source_req), 1957170613Sbms sizeof(struct group_source_req)); 1958170613Sbms } 1959170613Sbms if (error) 1960170613Sbms return (error); 1961170613Sbms 1962170613Sbms if (gsa->sin.sin_family != AF_INET || 1963170613Sbms gsa->sin.sin_len != sizeof(struct sockaddr_in)) 1964170613Sbms return (EINVAL); 1965170613Sbms 1966170613Sbms /* 1967170613Sbms * Overwrite the port field if present, as the sockaddr 1968170613Sbms * being copied in may be matched with a binary comparison. 1969170613Sbms */ 1970170613Sbms gsa->sin.sin_port = 0; 1971170613Sbms if (sopt->sopt_name == MCAST_JOIN_SOURCE_GROUP) { 1972170613Sbms if (ssa->sin.sin_family != AF_INET || 1973170613Sbms ssa->sin.sin_len != sizeof(struct sockaddr_in)) 1974170613Sbms return (EINVAL); 1975170613Sbms ssa->sin.sin_port = 0; 1976170613Sbms } 1977170613Sbms 1978196932Ssyrinx if (!IN_MULTICAST(ntohl(gsa->sin.sin_addr.s_addr))) 1979196932Ssyrinx return (EINVAL); 1980196932Ssyrinx 1981181803Sbz if (gsr.gsr_interface == 0 || V_if_index < gsr.gsr_interface) 1982170613Sbms return (EADDRNOTAVAIL); 1983170613Sbms ifp = ifnet_byindex(gsr.gsr_interface); 1984170613Sbms break; 1985170613Sbms 1986170613Sbms default: 1987189592Sbms CTR2(KTR_IGMPV3, "%s: unknown sopt_name %d", 1988189592Sbms __func__, sopt->sopt_name); 1989170613Sbms return (EOPNOTSUPP); 1990170613Sbms break; 1991170613Sbms } 1992170613Sbms 1993170613Sbms if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) 1994170613Sbms return (EADDRNOTAVAIL); 1995170613Sbms 1996170613Sbms imo = inp_findmoptions(inp); 1997170613Sbms idx = imo_match_group(imo, ifp, &gsa->sa); 1998189592Sbms if (idx == -1) { 1999189592Sbms is_new = 1; 2000189592Sbms } else { 2001189592Sbms inm = imo->imo_membership[idx]; 2002189592Sbms imf = &imo->imo_mfilters[idx]; 2003197132Sbms if (ssa->ss.ss_family != AF_UNSPEC) { 2004197132Sbms /* 2005199525Sbms * MCAST_JOIN_SOURCE_GROUP on an exclusive membership 2006197132Sbms * is an error. On an existing inclusive membership, 2007197132Sbms * it just adds the source to the filter list. 2008197132Sbms */ 2009197132Sbms if (imf->imf_st[1] != MCAST_INCLUDE) { 2010197132Sbms error = EINVAL; 2011197132Sbms goto out_inp_locked; 2012197132Sbms } 2013197136Sbms /* 2014197136Sbms * Throw out duplicates. 2015197136Sbms * 2016197136Sbms * XXX FIXME: This makes a naive assumption that 2017197136Sbms * even if entries exist for *ssa in this imf, 2018197136Sbms * they will be rejected as dupes, even if they 2019197136Sbms * are not valid in the current mode (in-mode). 2020197136Sbms * 2021197136Sbms * in_msource is transactioned just as for anything 2022197136Sbms * else in SSM -- but note naive use of inm_graft() 2023197136Sbms * below for allocating new filter entries. 2024197136Sbms * 2025197136Sbms * This is only an issue if someone mixes the 2026197136Sbms * full-state SSM API with the delta-based API, 2027197136Sbms * which is discouraged in the relevant RFCs. 2028197136Sbms */ 2029197132Sbms lims = imo_match_source(imo, idx, &ssa->sa); 2030197136Sbms if (lims != NULL /*&& 2031197136Sbms lims->imsl_st[1] == MCAST_INCLUDE*/) { 2032197132Sbms error = EADDRNOTAVAIL; 2033197132Sbms goto out_inp_locked; 2034197132Sbms } 2035197132Sbms } else { 2036197132Sbms /* 2037206452Sbms * MCAST_JOIN_GROUP on an existing exclusive 2038206452Sbms * membership is an error; return EADDRINUSE 2039206452Sbms * to preserve 4.4BSD API idempotence, and 2040206452Sbms * avoid tedious detour to code below. 2041206452Sbms * NOTE: This is bending RFC 3678 a bit. 2042206452Sbms * 2043197135Sbms * On an existing inclusive membership, this is also 2044197135Sbms * an error; if you want to change filter mode, 2045197135Sbms * you must use the userland API setsourcefilter(). 2046197135Sbms * XXX We don't reject this for imf in UNDEFINED 2047197135Sbms * state at t1, because allocation of a filter 2048197135Sbms * is atomic with allocation of a membership. 2049197132Sbms */ 2050197135Sbms error = EINVAL; 2051206452Sbms if (imf->imf_st[1] == MCAST_EXCLUDE) 2052206452Sbms error = EADDRINUSE; 2053197135Sbms goto out_inp_locked; 2054189592Sbms } 2055170613Sbms } 2056170613Sbms 2057170613Sbms /* 2058189592Sbms * Begin state merge transaction at socket layer. 2059170613Sbms */ 2060189592Sbms INP_WLOCK_ASSERT(inp); 2061189592Sbms 2062189592Sbms if (is_new) { 2063189592Sbms if (imo->imo_num_memberships == imo->imo_max_memberships) { 2064189592Sbms error = imo_grow(imo); 2065189592Sbms if (error) 2066189592Sbms goto out_inp_locked; 2067189592Sbms } 2068189592Sbms /* 2069189592Sbms * Allocate the new slot upfront so we can deal with 2070189592Sbms * grafting the new source filter in same code path 2071189592Sbms * as for join-source on existing membership. 2072189592Sbms */ 2073189592Sbms idx = imo->imo_num_memberships; 2074189592Sbms imo->imo_membership[idx] = NULL; 2075189592Sbms imo->imo_num_memberships++; 2076189592Sbms KASSERT(imo->imo_mfilters != NULL, 2077189592Sbms ("%s: imf_mfilters vector was not allocated", __func__)); 2078189592Sbms imf = &imo->imo_mfilters[idx]; 2079189592Sbms KASSERT(RB_EMPTY(&imf->imf_sources), 2080189592Sbms ("%s: imf_sources not empty", __func__)); 2081170613Sbms } 2082170613Sbms 2083170613Sbms /* 2084189592Sbms * Graft new source into filter list for this inpcb's 2085189592Sbms * membership of the group. The in_multi may not have 2086197132Sbms * been allocated yet if this is a new membership, however, 2087197132Sbms * the in_mfilter slot will be allocated and must be initialized. 2088197135Sbms * 2089197135Sbms * Note: Grafting of exclusive mode filters doesn't happen 2090197135Sbms * in this path. 2091197136Sbms * XXX: Should check for non-NULL lims (node exists but may 2092197136Sbms * not be in-mode) for interop with full-state API. 2093170613Sbms */ 2094189592Sbms if (ssa->ss.ss_family != AF_UNSPEC) { 2095189592Sbms /* Membership starts in IN mode */ 2096189592Sbms if (is_new) { 2097189592Sbms CTR1(KTR_IGMPV3, "%s: new join w/source", __func__); 2098189592Sbms imf_init(imf, MCAST_UNDEFINED, MCAST_INCLUDE); 2099189592Sbms } else { 2100189592Sbms CTR2(KTR_IGMPV3, "%s: %s source", __func__, "allow"); 2101189592Sbms } 2102189592Sbms lims = imf_graft(imf, MCAST_INCLUDE, &ssa->sin); 2103189592Sbms if (lims == NULL) { 2104189592Sbms CTR1(KTR_IGMPV3, "%s: merge imf state failed", 2105189592Sbms __func__); 2106189592Sbms error = ENOMEM; 2107189592Sbms goto out_imo_free; 2108189592Sbms } 2109197132Sbms } else { 2110197132Sbms /* No address specified; Membership starts in EX mode */ 2111197132Sbms if (is_new) { 2112197132Sbms CTR1(KTR_IGMPV3, "%s: new join w/o source", __func__); 2113197132Sbms imf_init(imf, MCAST_UNDEFINED, MCAST_EXCLUDE); 2114197132Sbms } 2115170613Sbms } 2116170613Sbms 2117170613Sbms /* 2118189592Sbms * Begin state merge transaction at IGMP layer. 2119170613Sbms */ 2120189592Sbms IN_MULTI_LOCK(); 2121170613Sbms 2122189592Sbms if (is_new) { 2123189592Sbms error = in_joingroup_locked(ifp, &gsa->sin.sin_addr, imf, 2124189592Sbms &inm); 2125189592Sbms if (error) 2126189592Sbms goto out_imo_free; 2127189592Sbms imo->imo_membership[idx] = inm; 2128189592Sbms } else { 2129189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 2130189592Sbms error = inm_merge(inm, imf); 2131170613Sbms if (error) { 2132189592Sbms CTR1(KTR_IGMPV3, "%s: failed to merge inm state", 2133189592Sbms __func__); 2134189592Sbms goto out_imf_rollback; 2135170613Sbms } 2136189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 2137189592Sbms error = igmp_change_state(inm); 2138189592Sbms if (error) { 2139189592Sbms CTR1(KTR_IGMPV3, "%s: failed igmp downcall", 2140189592Sbms __func__); 2141189592Sbms goto out_imf_rollback; 2142189592Sbms } 2143170613Sbms } 2144170613Sbms 2145189592Sbms IN_MULTI_UNLOCK(); 2146189592Sbms 2147189592Sbmsout_imf_rollback: 2148189592Sbms INP_WLOCK_ASSERT(inp); 2149189592Sbms if (error) { 2150189592Sbms imf_rollback(imf); 2151189592Sbms if (is_new) 2152189592Sbms imf_purge(imf); 2153189592Sbms else 2154189592Sbms imf_reap(imf); 2155189592Sbms } else { 2156189592Sbms imf_commit(imf); 2157189592Sbms } 2158189592Sbms 2159189592Sbmsout_imo_free: 2160189592Sbms if (error && is_new) { 2161189592Sbms imo->imo_membership[idx] = NULL; 2162189592Sbms --imo->imo_num_memberships; 2163189592Sbms } 2164189592Sbms 2165189592Sbmsout_inp_locked: 2166178285Srwatson INP_WUNLOCK(inp); 2167170613Sbms return (error); 2168170613Sbms} 2169170613Sbms 2170170613Sbms/* 2171170613Sbms * Leave an IPv4 multicast group on an inpcb, possibly with a source. 2172170613Sbms */ 2173170613Sbmsstatic int 2174170613Sbmsinp_leave_group(struct inpcb *inp, struct sockopt *sopt) 2175170613Sbms{ 2176170613Sbms struct group_source_req gsr; 2177170613Sbms struct ip_mreq_source mreqs; 2178170613Sbms sockunion_t *gsa, *ssa; 2179170613Sbms struct ifnet *ifp; 2180170613Sbms struct in_mfilter *imf; 2181170613Sbms struct ip_moptions *imo; 2182189592Sbms struct in_msource *ims; 2183170613Sbms struct in_multi *inm; 2184170613Sbms size_t idx; 2185189592Sbms int error, is_final; 2186170613Sbms 2187170613Sbms ifp = NULL; 2188170613Sbms error = 0; 2189189592Sbms is_final = 1; 2190170613Sbms 2191170613Sbms memset(&gsr, 0, sizeof(struct group_source_req)); 2192170613Sbms gsa = (sockunion_t *)&gsr.gsr_group; 2193170613Sbms gsa->ss.ss_family = AF_UNSPEC; 2194170613Sbms ssa = (sockunion_t *)&gsr.gsr_source; 2195170613Sbms ssa->ss.ss_family = AF_UNSPEC; 2196170613Sbms 2197170613Sbms switch (sopt->sopt_name) { 2198170613Sbms case IP_DROP_MEMBERSHIP: 2199170613Sbms case IP_DROP_SOURCE_MEMBERSHIP: 2200170613Sbms if (sopt->sopt_name == IP_DROP_MEMBERSHIP) { 2201170613Sbms error = sooptcopyin(sopt, &mreqs, 2202170613Sbms sizeof(struct ip_mreq), 2203170613Sbms sizeof(struct ip_mreq)); 2204170613Sbms /* 2205170613Sbms * Swap interface and sourceaddr arguments, 2206170613Sbms * as ip_mreq and ip_mreq_source are laid 2207170613Sbms * out differently. 2208170613Sbms */ 2209170613Sbms mreqs.imr_interface = mreqs.imr_sourceaddr; 2210170613Sbms mreqs.imr_sourceaddr.s_addr = INADDR_ANY; 2211170613Sbms } else if (sopt->sopt_name == IP_DROP_SOURCE_MEMBERSHIP) { 2212170613Sbms error = sooptcopyin(sopt, &mreqs, 2213170613Sbms sizeof(struct ip_mreq_source), 2214170613Sbms sizeof(struct ip_mreq_source)); 2215170613Sbms } 2216170613Sbms if (error) 2217170613Sbms return (error); 2218170613Sbms 2219170613Sbms gsa->sin.sin_family = AF_INET; 2220170613Sbms gsa->sin.sin_len = sizeof(struct sockaddr_in); 2221170613Sbms gsa->sin.sin_addr = mreqs.imr_multiaddr; 2222170613Sbms 2223170613Sbms if (sopt->sopt_name == IP_DROP_SOURCE_MEMBERSHIP) { 2224170613Sbms ssa->sin.sin_family = AF_INET; 2225170613Sbms ssa->sin.sin_len = sizeof(struct sockaddr_in); 2226170613Sbms ssa->sin.sin_addr = mreqs.imr_sourceaddr; 2227170613Sbms } 2228170613Sbms 2229206452Sbms /* 2230206452Sbms * Attempt to look up hinted ifp from interface address. 2231206452Sbms * Fallthrough with null ifp iff lookup fails, to 2232206452Sbms * preserve 4.4BSD mcast API idempotence. 2233206452Sbms * XXX NOTE WELL: The RFC 3678 API is preferred because 2234206452Sbms * using an IPv4 address as a key is racy. 2235206452Sbms */ 2236206452Sbms if (!in_nullhost(mreqs.imr_interface)) 2237170613Sbms INADDR_TO_IFP(mreqs.imr_interface, ifp); 2238170613Sbms 2239189592Sbms CTR3(KTR_IGMPV3, "%s: imr_interface = %s, ifp = %p", 2240189592Sbms __func__, inet_ntoa(mreqs.imr_interface), ifp); 2241189592Sbms 2242170613Sbms break; 2243170613Sbms 2244170613Sbms case MCAST_LEAVE_GROUP: 2245170613Sbms case MCAST_LEAVE_SOURCE_GROUP: 2246170613Sbms if (sopt->sopt_name == MCAST_LEAVE_GROUP) { 2247170613Sbms error = sooptcopyin(sopt, &gsr, 2248170613Sbms sizeof(struct group_req), 2249170613Sbms sizeof(struct group_req)); 2250170613Sbms } else if (sopt->sopt_name == MCAST_LEAVE_SOURCE_GROUP) { 2251170613Sbms error = sooptcopyin(sopt, &gsr, 2252170613Sbms sizeof(struct group_source_req), 2253170613Sbms sizeof(struct group_source_req)); 2254170613Sbms } 2255170613Sbms if (error) 2256170613Sbms return (error); 2257170613Sbms 2258170613Sbms if (gsa->sin.sin_family != AF_INET || 2259170613Sbms gsa->sin.sin_len != sizeof(struct sockaddr_in)) 2260170613Sbms return (EINVAL); 2261170613Sbms 2262170613Sbms if (sopt->sopt_name == MCAST_LEAVE_SOURCE_GROUP) { 2263170613Sbms if (ssa->sin.sin_family != AF_INET || 2264170613Sbms ssa->sin.sin_len != sizeof(struct sockaddr_in)) 2265170613Sbms return (EINVAL); 2266170613Sbms } 2267170613Sbms 2268181803Sbz if (gsr.gsr_interface == 0 || V_if_index < gsr.gsr_interface) 2269170613Sbms return (EADDRNOTAVAIL); 2270170613Sbms 2271170613Sbms ifp = ifnet_byindex(gsr.gsr_interface); 2272206452Sbms 2273206452Sbms if (ifp == NULL) 2274206452Sbms return (EADDRNOTAVAIL); 2275170613Sbms break; 2276170613Sbms 2277170613Sbms default: 2278189592Sbms CTR2(KTR_IGMPV3, "%s: unknown sopt_name %d", 2279189592Sbms __func__, sopt->sopt_name); 2280170613Sbms return (EOPNOTSUPP); 2281170613Sbms break; 2282170613Sbms } 2283170613Sbms 2284170613Sbms if (!IN_MULTICAST(ntohl(gsa->sin.sin_addr.s_addr))) 2285170613Sbms return (EINVAL); 2286170613Sbms 2287170613Sbms /* 2288170613Sbms * Find the membership in the membership array. 2289170613Sbms */ 2290170613Sbms imo = inp_findmoptions(inp); 2291170613Sbms idx = imo_match_group(imo, ifp, &gsa->sa); 2292170613Sbms if (idx == -1) { 2293170613Sbms error = EADDRNOTAVAIL; 2294189592Sbms goto out_inp_locked; 2295170613Sbms } 2296189592Sbms inm = imo->imo_membership[idx]; 2297170613Sbms imf = &imo->imo_mfilters[idx]; 2298170613Sbms 2299189592Sbms if (ssa->ss.ss_family != AF_UNSPEC) 2300189592Sbms is_final = 0; 2301189592Sbms 2302170613Sbms /* 2303189592Sbms * Begin state merge transaction at socket layer. 2304189592Sbms */ 2305189592Sbms INP_WLOCK_ASSERT(inp); 2306189592Sbms 2307189592Sbms /* 2308170613Sbms * If we were instructed only to leave a given source, do so. 2309189592Sbms * MCAST_LEAVE_SOURCE_GROUP is only valid for inclusive memberships. 2310170613Sbms */ 2311189592Sbms if (is_final) { 2312189592Sbms imf_leave(imf); 2313189592Sbms } else { 2314189592Sbms if (imf->imf_st[0] == MCAST_EXCLUDE) { 2315189592Sbms error = EADDRNOTAVAIL; 2316189592Sbms goto out_inp_locked; 2317170613Sbms } 2318189592Sbms ims = imo_match_source(imo, idx, &ssa->sa); 2319189592Sbms if (ims == NULL) { 2320189592Sbms CTR3(KTR_IGMPV3, "%s: source %s %spresent", __func__, 2321189592Sbms inet_ntoa(ssa->sin.sin_addr), "not "); 2322189592Sbms error = EADDRNOTAVAIL; 2323189592Sbms goto out_inp_locked; 2324189592Sbms } 2325189592Sbms CTR2(KTR_IGMPV3, "%s: %s source", __func__, "block"); 2326189592Sbms error = imf_prune(imf, &ssa->sin); 2327189592Sbms if (error) { 2328189592Sbms CTR1(KTR_IGMPV3, "%s: merge imf state failed", 2329189592Sbms __func__); 2330189592Sbms goto out_inp_locked; 2331189592Sbms } 2332170613Sbms } 2333170613Sbms 2334170613Sbms /* 2335189592Sbms * Begin state merge transaction at IGMP layer. 2336170613Sbms */ 2337189592Sbms IN_MULTI_LOCK(); 2338170613Sbms 2339189592Sbms if (is_final) { 2340189592Sbms /* 2341189592Sbms * Give up the multicast address record to which 2342189592Sbms * the membership points. 2343189592Sbms */ 2344189592Sbms (void)in_leavegroup_locked(inm, imf); 2345189592Sbms } else { 2346189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 2347189592Sbms error = inm_merge(inm, imf); 2348189592Sbms if (error) { 2349189592Sbms CTR1(KTR_IGMPV3, "%s: failed to merge inm state", 2350189592Sbms __func__); 2351189592Sbms goto out_imf_rollback; 2352170613Sbms } 2353189592Sbms 2354189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 2355189592Sbms error = igmp_change_state(inm); 2356189592Sbms if (error) { 2357189592Sbms CTR1(KTR_IGMPV3, "%s: failed igmp downcall", 2358189592Sbms __func__); 2359189592Sbms } 2360170613Sbms } 2361170613Sbms 2362189592Sbms IN_MULTI_UNLOCK(); 2363170613Sbms 2364189592Sbmsout_imf_rollback: 2365189592Sbms if (error) 2366189592Sbms imf_rollback(imf); 2367189592Sbms else 2368189592Sbms imf_commit(imf); 2369189592Sbms 2370189592Sbms imf_reap(imf); 2371189592Sbms 2372189592Sbms if (is_final) { 2373197130Sbms /* Remove the gap in the membership and filter array. */ 2374197130Sbms for (++idx; idx < imo->imo_num_memberships; ++idx) { 2375189592Sbms imo->imo_membership[idx-1] = imo->imo_membership[idx]; 2376197130Sbms imo->imo_mfilters[idx-1] = imo->imo_mfilters[idx]; 2377197130Sbms } 2378189592Sbms imo->imo_num_memberships--; 2379189592Sbms } 2380189592Sbms 2381189592Sbmsout_inp_locked: 2382178285Srwatson INP_WUNLOCK(inp); 2383170613Sbms return (error); 2384170613Sbms} 2385170613Sbms 2386170613Sbms/* 2387170613Sbms * Select the interface for transmitting IPv4 multicast datagrams. 2388170613Sbms * 2389170613Sbms * Either an instance of struct in_addr or an instance of struct ip_mreqn 2390170613Sbms * may be passed to this socket option. An address of INADDR_ANY or an 2391170613Sbms * interface index of 0 is used to remove a previous selection. 2392170613Sbms * When no interface is selected, one is chosen for every send. 2393170613Sbms */ 2394170613Sbmsstatic int 2395170613Sbmsinp_set_multicast_if(struct inpcb *inp, struct sockopt *sopt) 2396170613Sbms{ 2397170613Sbms struct in_addr addr; 2398170613Sbms struct ip_mreqn mreqn; 2399170613Sbms struct ifnet *ifp; 2400170613Sbms struct ip_moptions *imo; 2401170613Sbms int error; 2402170613Sbms 2403170613Sbms if (sopt->sopt_valsize == sizeof(struct ip_mreqn)) { 2404170613Sbms /* 2405170613Sbms * An interface index was specified using the 2406170613Sbms * Linux-derived ip_mreqn structure. 2407170613Sbms */ 2408170613Sbms error = sooptcopyin(sopt, &mreqn, sizeof(struct ip_mreqn), 2409170613Sbms sizeof(struct ip_mreqn)); 2410170613Sbms if (error) 2411170613Sbms return (error); 2412170613Sbms 2413181803Sbz if (mreqn.imr_ifindex < 0 || V_if_index < mreqn.imr_ifindex) 2414170613Sbms return (EINVAL); 2415170613Sbms 2416170613Sbms if (mreqn.imr_ifindex == 0) { 2417170613Sbms ifp = NULL; 2418170613Sbms } else { 2419170613Sbms ifp = ifnet_byindex(mreqn.imr_ifindex); 2420170613Sbms if (ifp == NULL) 2421170613Sbms return (EADDRNOTAVAIL); 2422170613Sbms } 2423170613Sbms } else { 2424170613Sbms /* 2425170613Sbms * An interface was specified by IPv4 address. 2426170613Sbms * This is the traditional BSD usage. 2427170613Sbms */ 2428170613Sbms error = sooptcopyin(sopt, &addr, sizeof(struct in_addr), 2429170613Sbms sizeof(struct in_addr)); 2430170613Sbms if (error) 2431170613Sbms return (error); 2432189592Sbms if (in_nullhost(addr)) { 2433170613Sbms ifp = NULL; 2434170613Sbms } else { 2435170613Sbms INADDR_TO_IFP(addr, ifp); 2436170613Sbms if (ifp == NULL) 2437170613Sbms return (EADDRNOTAVAIL); 2438170613Sbms } 2439189592Sbms CTR3(KTR_IGMPV3, "%s: ifp = %p, addr = %s", __func__, ifp, 2440189592Sbms inet_ntoa(addr)); 2441170613Sbms } 2442170613Sbms 2443170613Sbms /* Reject interfaces which do not support multicast. */ 2444170613Sbms if (ifp != NULL && (ifp->if_flags & IFF_MULTICAST) == 0) 2445170613Sbms return (EOPNOTSUPP); 2446170613Sbms 2447170613Sbms imo = inp_findmoptions(inp); 2448170613Sbms imo->imo_multicast_ifp = ifp; 2449170613Sbms imo->imo_multicast_addr.s_addr = INADDR_ANY; 2450178285Srwatson INP_WUNLOCK(inp); 2451170613Sbms 2452170613Sbms return (0); 2453170613Sbms} 2454170613Sbms 2455170613Sbms/* 2456170613Sbms * Atomically set source filters on a socket for an IPv4 multicast group. 2457189592Sbms * 2458189592Sbms * SMPng: NOTE: Potentially calls malloc(M_WAITOK) with Giant held. 2459170613Sbms */ 2460170613Sbmsstatic int 2461170613Sbmsinp_set_source_filters(struct inpcb *inp, struct sockopt *sopt) 2462170613Sbms{ 2463170613Sbms struct __msfilterreq msfr; 2464170613Sbms sockunion_t *gsa; 2465170613Sbms struct ifnet *ifp; 2466170613Sbms struct in_mfilter *imf; 2467170613Sbms struct ip_moptions *imo; 2468189592Sbms struct in_multi *inm; 2469170613Sbms size_t idx; 2470170613Sbms int error; 2471170613Sbms 2472170613Sbms error = sooptcopyin(sopt, &msfr, sizeof(struct __msfilterreq), 2473170613Sbms sizeof(struct __msfilterreq)); 2474170613Sbms if (error) 2475170613Sbms return (error); 2476170613Sbms 2477197314Sbms if (msfr.msfr_nsrcs > in_mcast_maxsocksrc) 2478197314Sbms return (ENOBUFS); 2479197314Sbms 2480197314Sbms if ((msfr.msfr_fmode != MCAST_EXCLUDE && 2481170613Sbms msfr.msfr_fmode != MCAST_INCLUDE)) 2482170613Sbms return (EINVAL); 2483170613Sbms 2484170613Sbms if (msfr.msfr_group.ss_family != AF_INET || 2485170613Sbms msfr.msfr_group.ss_len != sizeof(struct sockaddr_in)) 2486170613Sbms return (EINVAL); 2487170613Sbms 2488170613Sbms gsa = (sockunion_t *)&msfr.msfr_group; 2489170613Sbms if (!IN_MULTICAST(ntohl(gsa->sin.sin_addr.s_addr))) 2490170613Sbms return (EINVAL); 2491170613Sbms 2492170613Sbms gsa->sin.sin_port = 0; /* ignore port */ 2493170613Sbms 2494181803Sbz if (msfr.msfr_ifindex == 0 || V_if_index < msfr.msfr_ifindex) 2495170613Sbms return (EADDRNOTAVAIL); 2496170613Sbms 2497170613Sbms ifp = ifnet_byindex(msfr.msfr_ifindex); 2498170613Sbms if (ifp == NULL) 2499170613Sbms return (EADDRNOTAVAIL); 2500170613Sbms 2501170613Sbms /* 2502189592Sbms * Take the INP write lock. 2503170613Sbms * Check if this socket is a member of this group. 2504170613Sbms */ 2505170613Sbms imo = inp_findmoptions(inp); 2506170613Sbms idx = imo_match_group(imo, ifp, &gsa->sa); 2507170613Sbms if (idx == -1 || imo->imo_mfilters == NULL) { 2508170613Sbms error = EADDRNOTAVAIL; 2509189592Sbms goto out_inp_locked; 2510170613Sbms } 2511189592Sbms inm = imo->imo_membership[idx]; 2512170613Sbms imf = &imo->imo_mfilters[idx]; 2513170613Sbms 2514170613Sbms /* 2515189592Sbms * Begin state merge transaction at socket layer. 2516170613Sbms */ 2517189592Sbms INP_WLOCK_ASSERT(inp); 2518170613Sbms 2519189592Sbms imf->imf_st[1] = msfr.msfr_fmode; 2520189592Sbms 2521170613Sbms /* 2522170613Sbms * Apply any new source filters, if present. 2523189592Sbms * Make a copy of the user-space source vector so 2524189592Sbms * that we may copy them with a single copyin. This 2525189592Sbms * allows us to deal with page faults up-front. 2526170613Sbms */ 2527170613Sbms if (msfr.msfr_nsrcs > 0) { 2528189592Sbms struct in_msource *lims; 2529189592Sbms struct sockaddr_in *psin; 2530189592Sbms struct sockaddr_storage *kss, *pkss; 2531189592Sbms int i; 2532170613Sbms 2533178285Srwatson INP_WUNLOCK(inp); 2534189592Sbms 2535189592Sbms CTR2(KTR_IGMPV3, "%s: loading %lu source list entries", 2536189592Sbms __func__, (unsigned long)msfr.msfr_nsrcs); 2537184214Sdes kss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs, 2538170613Sbms M_TEMP, M_WAITOK); 2539170613Sbms error = copyin(msfr.msfr_srcs, kss, 2540170613Sbms sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs); 2541170613Sbms if (error) { 2542184205Sdes free(kss, M_TEMP); 2543170613Sbms return (error); 2544170613Sbms } 2545170613Sbms 2546189592Sbms INP_WLOCK(inp); 2547189592Sbms 2548170613Sbms /* 2549189592Sbms * Mark all source filters as UNDEFINED at t1. 2550189592Sbms * Restore new group filter mode, as imf_leave() 2551189592Sbms * will set it to INCLUDE. 2552170613Sbms */ 2553189592Sbms imf_leave(imf); 2554189592Sbms imf->imf_st[1] = msfr.msfr_fmode; 2555189592Sbms 2556189592Sbms /* 2557189592Sbms * Update socket layer filters at t1, lazy-allocating 2558189592Sbms * new entries. This saves a bunch of memory at the 2559189592Sbms * cost of one RB_FIND() per source entry; duplicate 2560189592Sbms * entries in the msfr_nsrcs vector are ignored. 2561189592Sbms * If we encounter an error, rollback transaction. 2562189592Sbms * 2563189592Sbms * XXX This too could be replaced with a set-symmetric 2564189592Sbms * difference like loop to avoid walking from root 2565189592Sbms * every time, as the key space is common. 2566189592Sbms */ 2567189592Sbms for (i = 0, pkss = kss; i < msfr.msfr_nsrcs; i++, pkss++) { 2568189592Sbms psin = (struct sockaddr_in *)pkss; 2569189592Sbms if (psin->sin_family != AF_INET) { 2570170613Sbms error = EAFNOSUPPORT; 2571170613Sbms break; 2572170613Sbms } 2573189592Sbms if (psin->sin_len != sizeof(struct sockaddr_in)) { 2574189592Sbms error = EINVAL; 2575189592Sbms break; 2576189592Sbms } 2577189592Sbms error = imf_get_source(imf, psin, &lims); 2578170613Sbms if (error) 2579170613Sbms break; 2580189592Sbms lims->imsl_st[1] = imf->imf_st[1]; 2581170613Sbms } 2582189592Sbms free(kss, M_TEMP); 2583189592Sbms } 2584170613Sbms 2585189592Sbms if (error) 2586189592Sbms goto out_imf_rollback; 2587170613Sbms 2588189592Sbms INP_WLOCK_ASSERT(inp); 2589189592Sbms IN_MULTI_LOCK(); 2590170613Sbms 2591170613Sbms /* 2592189592Sbms * Begin state merge transaction at IGMP layer. 2593170613Sbms */ 2594189592Sbms CTR1(KTR_IGMPV3, "%s: merge inm state", __func__); 2595189592Sbms error = inm_merge(inm, imf); 2596189592Sbms if (error) { 2597189592Sbms CTR1(KTR_IGMPV3, "%s: failed to merge inm state", __func__); 2598189592Sbms goto out_imf_rollback; 2599189592Sbms } 2600170613Sbms 2601189592Sbms CTR1(KTR_IGMPV3, "%s: doing igmp downcall", __func__); 2602189592Sbms error = igmp_change_state(inm); 2603189592Sbms if (error) 2604189592Sbms CTR1(KTR_IGMPV3, "%s: failed igmp downcall", __func__); 2605189592Sbms 2606189592Sbms IN_MULTI_UNLOCK(); 2607189592Sbms 2608189592Sbmsout_imf_rollback: 2609189592Sbms if (error) 2610189592Sbms imf_rollback(imf); 2611189592Sbms else 2612189592Sbms imf_commit(imf); 2613189592Sbms 2614189592Sbms imf_reap(imf); 2615189592Sbms 2616189592Sbmsout_inp_locked: 2617178285Srwatson INP_WUNLOCK(inp); 2618170613Sbms return (error); 2619170613Sbms} 2620170613Sbms 2621170613Sbms/* 2622170613Sbms * Set the IP multicast options in response to user setsockopt(). 2623170613Sbms * 2624170613Sbms * Many of the socket options handled in this function duplicate the 2625170613Sbms * functionality of socket options in the regular unicast API. However, 2626170613Sbms * it is not possible to merge the duplicate code, because the idempotence 2627170613Sbms * of the IPv4 multicast part of the BSD Sockets API must be preserved; 2628170613Sbms * the effects of these options must be treated as separate and distinct. 2629189592Sbms * 2630189592Sbms * SMPng: XXX: Unlocked read of inp_socket believed OK. 2631189592Sbms * FUTURE: The IP_MULTICAST_VIF option may be eliminated if MROUTING 2632189592Sbms * is refactored to no longer use vifs. 2633170613Sbms */ 2634170613Sbmsint 2635170613Sbmsinp_setmoptions(struct inpcb *inp, struct sockopt *sopt) 2636170613Sbms{ 2637170613Sbms struct ip_moptions *imo; 2638170613Sbms int error; 2639170613Sbms 2640170613Sbms error = 0; 2641170613Sbms 2642171746Scsjp /* 2643171746Scsjp * If socket is neither of type SOCK_RAW or SOCK_DGRAM, 2644171746Scsjp * or is a divert socket, reject it. 2645171746Scsjp */ 2646171746Scsjp if (inp->inp_socket->so_proto->pr_protocol == IPPROTO_DIVERT || 2647171746Scsjp (inp->inp_socket->so_proto->pr_type != SOCK_RAW && 2648189592Sbms inp->inp_socket->so_proto->pr_type != SOCK_DGRAM)) 2649171746Scsjp return (EOPNOTSUPP); 2650171746Scsjp 2651170613Sbms switch (sopt->sopt_name) { 2652170613Sbms case IP_MULTICAST_VIF: { 2653170613Sbms int vifi; 2654170613Sbms /* 2655170613Sbms * Select a multicast VIF for transmission. 2656170613Sbms * Only useful if multicast forwarding is active. 2657170613Sbms */ 2658170613Sbms if (legal_vif_num == NULL) { 2659170613Sbms error = EOPNOTSUPP; 2660170613Sbms break; 2661170613Sbms } 2662170613Sbms error = sooptcopyin(sopt, &vifi, sizeof(int), sizeof(int)); 2663170613Sbms if (error) 2664170613Sbms break; 2665170613Sbms if (!legal_vif_num(vifi) && (vifi != -1)) { 2666170613Sbms error = EINVAL; 2667170613Sbms break; 2668170613Sbms } 2669170613Sbms imo = inp_findmoptions(inp); 2670170613Sbms imo->imo_multicast_vif = vifi; 2671178285Srwatson INP_WUNLOCK(inp); 2672170613Sbms break; 2673170613Sbms } 2674170613Sbms 2675170613Sbms case IP_MULTICAST_IF: 2676170613Sbms error = inp_set_multicast_if(inp, sopt); 2677170613Sbms break; 2678170613Sbms 2679170613Sbms case IP_MULTICAST_TTL: { 2680170613Sbms u_char ttl; 2681170613Sbms 2682170613Sbms /* 2683170613Sbms * Set the IP time-to-live for outgoing multicast packets. 2684170613Sbms * The original multicast API required a char argument, 2685170613Sbms * which is inconsistent with the rest of the socket API. 2686170613Sbms * We allow either a char or an int. 2687170613Sbms */ 2688170613Sbms if (sopt->sopt_valsize == sizeof(u_char)) { 2689170613Sbms error = sooptcopyin(sopt, &ttl, sizeof(u_char), 2690170613Sbms sizeof(u_char)); 2691170613Sbms if (error) 2692170613Sbms break; 2693170613Sbms } else { 2694170613Sbms u_int ittl; 2695170613Sbms 2696170613Sbms error = sooptcopyin(sopt, &ittl, sizeof(u_int), 2697170613Sbms sizeof(u_int)); 2698170613Sbms if (error) 2699170613Sbms break; 2700170613Sbms if (ittl > 255) { 2701170613Sbms error = EINVAL; 2702170613Sbms break; 2703170613Sbms } 2704170613Sbms ttl = (u_char)ittl; 2705170613Sbms } 2706170613Sbms imo = inp_findmoptions(inp); 2707170613Sbms imo->imo_multicast_ttl = ttl; 2708178285Srwatson INP_WUNLOCK(inp); 2709170613Sbms break; 2710170613Sbms } 2711170613Sbms 2712170613Sbms case IP_MULTICAST_LOOP: { 2713170613Sbms u_char loop; 2714170613Sbms 2715170613Sbms /* 2716170613Sbms * Set the loopback flag for outgoing multicast packets. 2717170613Sbms * Must be zero or one. The original multicast API required a 2718170613Sbms * char argument, which is inconsistent with the rest 2719170613Sbms * of the socket API. We allow either a char or an int. 2720170613Sbms */ 2721170613Sbms if (sopt->sopt_valsize == sizeof(u_char)) { 2722170613Sbms error = sooptcopyin(sopt, &loop, sizeof(u_char), 2723170613Sbms sizeof(u_char)); 2724170613Sbms if (error) 2725170613Sbms break; 2726170613Sbms } else { 2727170613Sbms u_int iloop; 2728170613Sbms 2729170613Sbms error = sooptcopyin(sopt, &iloop, sizeof(u_int), 2730170613Sbms sizeof(u_int)); 2731170613Sbms if (error) 2732170613Sbms break; 2733170613Sbms loop = (u_char)iloop; 2734170613Sbms } 2735170613Sbms imo = inp_findmoptions(inp); 2736170613Sbms imo->imo_multicast_loop = !!loop; 2737178285Srwatson INP_WUNLOCK(inp); 2738170613Sbms break; 2739170613Sbms } 2740170613Sbms 2741170613Sbms case IP_ADD_MEMBERSHIP: 2742170613Sbms case IP_ADD_SOURCE_MEMBERSHIP: 2743170613Sbms case MCAST_JOIN_GROUP: 2744170613Sbms case MCAST_JOIN_SOURCE_GROUP: 2745170613Sbms error = inp_join_group(inp, sopt); 2746170613Sbms break; 2747170613Sbms 2748170613Sbms case IP_DROP_MEMBERSHIP: 2749170613Sbms case IP_DROP_SOURCE_MEMBERSHIP: 2750170613Sbms case MCAST_LEAVE_GROUP: 2751170613Sbms case MCAST_LEAVE_SOURCE_GROUP: 2752170613Sbms error = inp_leave_group(inp, sopt); 2753170613Sbms break; 2754170613Sbms 2755170613Sbms case IP_BLOCK_SOURCE: 2756170613Sbms case IP_UNBLOCK_SOURCE: 2757170613Sbms case MCAST_BLOCK_SOURCE: 2758170613Sbms case MCAST_UNBLOCK_SOURCE: 2759189592Sbms error = inp_block_unblock_source(inp, sopt); 2760170613Sbms break; 2761170613Sbms 2762170613Sbms case IP_MSFILTER: 2763170613Sbms error = inp_set_source_filters(inp, sopt); 2764170613Sbms break; 2765170613Sbms 2766170613Sbms default: 2767170613Sbms error = EOPNOTSUPP; 2768170613Sbms break; 2769170613Sbms } 2770170613Sbms 2771170613Sbms INP_UNLOCK_ASSERT(inp); 2772170613Sbms 2773170613Sbms return (error); 2774170613Sbms} 2775189592Sbms 2776189592Sbms/* 2777189592Sbms * Expose IGMP's multicast filter mode and source list(s) to userland, 2778189592Sbms * keyed by (ifindex, group). 2779189592Sbms * The filter mode is written out as a uint32_t, followed by 2780189592Sbms * 0..n of struct in_addr. 2781189592Sbms * For use by ifmcstat(8). 2782189592Sbms * SMPng: NOTE: unlocked read of ifindex space. 2783189592Sbms */ 2784189592Sbmsstatic int 2785189592Sbmssysctl_ip_mcast_filters(SYSCTL_HANDLER_ARGS) 2786189592Sbms{ 2787189592Sbms struct in_addr src, group; 2788189592Sbms struct ifnet *ifp; 2789189592Sbms struct ifmultiaddr *ifma; 2790189592Sbms struct in_multi *inm; 2791189592Sbms struct ip_msource *ims; 2792189592Sbms int *name; 2793189592Sbms int retval; 2794189592Sbms u_int namelen; 2795189592Sbms uint32_t fmode, ifindex; 2796189592Sbms 2797189592Sbms name = (int *)arg1; 2798189592Sbms namelen = arg2; 2799189592Sbms 2800189592Sbms if (req->newptr != NULL) 2801189592Sbms return (EPERM); 2802189592Sbms 2803189592Sbms if (namelen != 2) 2804189592Sbms return (EINVAL); 2805189592Sbms 2806189592Sbms ifindex = name[0]; 2807189592Sbms if (ifindex <= 0 || ifindex > V_if_index) { 2808189592Sbms CTR2(KTR_IGMPV3, "%s: ifindex %u out of range", 2809189592Sbms __func__, ifindex); 2810189592Sbms return (ENOENT); 2811189592Sbms } 2812189592Sbms 2813189592Sbms group.s_addr = name[1]; 2814189592Sbms if (!IN_MULTICAST(ntohl(group.s_addr))) { 2815189592Sbms CTR2(KTR_IGMPV3, "%s: group %s is not multicast", 2816189592Sbms __func__, inet_ntoa(group)); 2817189592Sbms return (EINVAL); 2818189592Sbms } 2819189592Sbms 2820189592Sbms ifp = ifnet_byindex(ifindex); 2821189592Sbms if (ifp == NULL) { 2822189592Sbms CTR2(KTR_IGMPV3, "%s: no ifp for ifindex %u", 2823189592Sbms __func__, ifindex); 2824189592Sbms return (ENOENT); 2825189592Sbms } 2826189592Sbms 2827189592Sbms retval = sysctl_wire_old_buffer(req, 2828189592Sbms sizeof(uint32_t) + (in_mcast_maxgrpsrc * sizeof(struct in_addr))); 2829189592Sbms if (retval) 2830189592Sbms return (retval); 2831189592Sbms 2832189592Sbms IN_MULTI_LOCK(); 2833189592Sbms 2834229621Sjhb IF_ADDR_RLOCK(ifp); 2835189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2836189592Sbms if (ifma->ifma_addr->sa_family != AF_INET || 2837189592Sbms ifma->ifma_protospec == NULL) 2838189592Sbms continue; 2839189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 2840189592Sbms if (!in_hosteq(inm->inm_addr, group)) 2841189592Sbms continue; 2842189592Sbms fmode = inm->inm_st[1].iss_fmode; 2843189592Sbms retval = SYSCTL_OUT(req, &fmode, sizeof(uint32_t)); 2844189592Sbms if (retval != 0) 2845189592Sbms break; 2846189592Sbms RB_FOREACH(ims, ip_msource_tree, &inm->inm_srcs) { 2847189592Sbms#ifdef KTR 2848189592Sbms struct in_addr ina; 2849189592Sbms ina.s_addr = htonl(ims->ims_haddr); 2850189592Sbms CTR2(KTR_IGMPV3, "%s: visit node %s", __func__, 2851189592Sbms inet_ntoa(ina)); 2852189592Sbms#endif 2853189592Sbms /* 2854189592Sbms * Only copy-out sources which are in-mode. 2855189592Sbms */ 2856189592Sbms if (fmode != ims_get_mode(inm, ims, 1)) { 2857189592Sbms CTR1(KTR_IGMPV3, "%s: skip non-in-mode", 2858189592Sbms __func__); 2859189592Sbms continue; 2860189592Sbms } 2861189592Sbms src.s_addr = htonl(ims->ims_haddr); 2862189592Sbms retval = SYSCTL_OUT(req, &src, sizeof(struct in_addr)); 2863189592Sbms if (retval != 0) 2864189592Sbms break; 2865189592Sbms } 2866189592Sbms } 2867229621Sjhb IF_ADDR_RUNLOCK(ifp); 2868189592Sbms 2869189592Sbms IN_MULTI_UNLOCK(); 2870189592Sbms 2871189592Sbms return (retval); 2872189592Sbms} 2873189592Sbms 2874189592Sbms#ifdef KTR 2875189592Sbms 2876189592Sbmsstatic const char *inm_modestrs[] = { "un", "in", "ex" }; 2877189592Sbms 2878189592Sbmsstatic const char * 2879189592Sbmsinm_mode_str(const int mode) 2880189592Sbms{ 2881189592Sbms 2882189592Sbms if (mode >= MCAST_UNDEFINED && mode <= MCAST_EXCLUDE) 2883189592Sbms return (inm_modestrs[mode]); 2884189592Sbms return ("??"); 2885189592Sbms} 2886189592Sbms 2887189592Sbmsstatic const char *inm_statestrs[] = { 2888189592Sbms "not-member", 2889189592Sbms "silent", 2890189592Sbms "idle", 2891189592Sbms "lazy", 2892189592Sbms "sleeping", 2893189592Sbms "awakening", 2894189592Sbms "query-pending", 2895189592Sbms "sg-query-pending", 2896189592Sbms "leaving" 2897189592Sbms}; 2898189592Sbms 2899189592Sbmsstatic const char * 2900189592Sbmsinm_state_str(const int state) 2901189592Sbms{ 2902189592Sbms 2903189592Sbms if (state >= IGMP_NOT_MEMBER && state <= IGMP_LEAVING_MEMBER) 2904189592Sbms return (inm_statestrs[state]); 2905189592Sbms return ("??"); 2906189592Sbms} 2907189592Sbms 2908189592Sbms/* 2909189592Sbms * Dump an in_multi structure to the console. 2910189592Sbms */ 2911189592Sbmsvoid 2912189592Sbmsinm_print(const struct in_multi *inm) 2913189592Sbms{ 2914189592Sbms int t; 2915189592Sbms 2916190753Skan if ((ktr_mask & KTR_IGMPV3) == 0) 2917189635Sbms return; 2918189635Sbms 2919189592Sbms printf("%s: --- begin inm %p ---\n", __func__, inm); 2920189592Sbms printf("addr %s ifp %p(%s) ifma %p\n", 2921189592Sbms inet_ntoa(inm->inm_addr), 2922189592Sbms inm->inm_ifp, 2923189592Sbms inm->inm_ifp->if_xname, 2924189592Sbms inm->inm_ifma); 2925189592Sbms printf("timer %u state %s refcount %u scq.len %u\n", 2926189592Sbms inm->inm_timer, 2927189592Sbms inm_state_str(inm->inm_state), 2928189592Sbms inm->inm_refcount, 2929189592Sbms inm->inm_scq.ifq_len); 2930189592Sbms printf("igi %p nsrc %lu sctimer %u scrv %u\n", 2931189592Sbms inm->inm_igi, 2932189592Sbms inm->inm_nsrc, 2933189592Sbms inm->inm_sctimer, 2934189592Sbms inm->inm_scrv); 2935189592Sbms for (t = 0; t < 2; t++) { 2936189592Sbms printf("t%d: fmode %s asm %u ex %u in %u rec %u\n", t, 2937189592Sbms inm_mode_str(inm->inm_st[t].iss_fmode), 2938189592Sbms inm->inm_st[t].iss_asm, 2939189592Sbms inm->inm_st[t].iss_ex, 2940189592Sbms inm->inm_st[t].iss_in, 2941189592Sbms inm->inm_st[t].iss_rec); 2942189592Sbms } 2943189592Sbms printf("%s: --- end inm %p ---\n", __func__, inm); 2944189592Sbms} 2945189592Sbms 2946189592Sbms#else /* !KTR */ 2947189592Sbms 2948189592Sbmsvoid 2949189592Sbmsinm_print(const struct in_multi *inm) 2950189592Sbms{ 2951189592Sbms 2952189592Sbms} 2953189592Sbms 2954189592Sbms#endif /* KTR */ 2955189592Sbms 2956189592SbmsRB_GENERATE(ip_msource_tree, ip_msource, ims_link, ip_msource_cmp); 2957