igmp.c revision 207275
1139823Simp/*- 2189592Sbms * Copyright (c) 2007-2009 Bruce Simpson. 31541Srgrimes * Copyright (c) 1988 Stephen Deering. 41541Srgrimes * Copyright (c) 1992, 1993 51541Srgrimes * The Regents of the University of California. All rights reserved. 61541Srgrimes * 71541Srgrimes * This code is derived from software contributed to Berkeley by 81541Srgrimes * Stephen Deering of Stanford University. 91541Srgrimes * 101541Srgrimes * Redistribution and use in source and binary forms, with or without 111541Srgrimes * modification, are permitted provided that the following conditions 121541Srgrimes * are met: 131541Srgrimes * 1. Redistributions of source code must retain the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer. 151541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161541Srgrimes * notice, this list of conditions and the following disclaimer in the 171541Srgrimes * documentation and/or other materials provided with the distribution. 181541Srgrimes * 4. Neither the name of the University nor the names of its contributors 191541Srgrimes * may be used to endorse or promote products derived from this software 201541Srgrimes * without specific prior written permission. 211541Srgrimes * 221541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321541Srgrimes * SUCH DAMAGE. 331541Srgrimes * 341541Srgrimes * @(#)igmp.c 8.1 (Berkeley) 7/19/93 351541Srgrimes */ 361541Srgrimes 372531Swollman/* 382531Swollman * Internet Group Management Protocol (IGMP) routines. 39189592Sbms * [RFC1112, RFC2236, RFC3376] 402531Swollman * 412531Swollman * Written by Steve Deering, Stanford, May 1988. 422531Swollman * Modified by Rosen Sharma, Stanford, Aug 1994. 439209Swollman * Modified by Bill Fenner, Xerox PARC, Feb 1995. 4414622Sfenner * Modified to fully comply to IGMPv2 by Bill Fenner, Oct 1995. 45189592Sbms * Significantly rewritten for IGMPv3, VIMAGE, and SMP by Bruce Simpson. 462531Swollman * 4714622Sfenner * MULTICAST Revision: 3.5.1.4 482531Swollman */ 491541Srgrimes 50172467Ssilby#include <sys/cdefs.h> 51172467Ssilby__FBSDID("$FreeBSD: head/sys/netinet/igmp.c 207275 2010-04-27 14:14:21Z bms $"); 52172467Ssilby 531541Srgrimes#include <sys/param.h> 541549Srgrimes#include <sys/systm.h> 55189592Sbms#include <sys/module.h> 5629024Sbde#include <sys/malloc.h> 571541Srgrimes#include <sys/mbuf.h> 581541Srgrimes#include <sys/socket.h> 591541Srgrimes#include <sys/protosw.h> 6012296Sphk#include <sys/kernel.h> 616472Swollman#include <sys/sysctl.h> 62189592Sbms#include <sys/ktr.h> 63189592Sbms#include <sys/condvar.h> 641541Srgrimes 651541Srgrimes#include <net/if.h> 66189592Sbms#include <net/netisr.h> 67185571Sbz#include <net/vnet.h> 681541Srgrimes 691541Srgrimes#include <netinet/in.h> 701541Srgrimes#include <netinet/in_var.h> 711541Srgrimes#include <netinet/in_systm.h> 721541Srgrimes#include <netinet/ip.h> 731541Srgrimes#include <netinet/ip_var.h> 74152592Sandre#include <netinet/ip_options.h> 751541Srgrimes#include <netinet/igmp.h> 761541Srgrimes#include <netinet/igmp_var.h> 771541Srgrimes 7860105Sjlemon#include <machine/in_cksum.h> 7960105Sjlemon 80163606Srwatson#include <security/mac/mac_framework.h> 81163606Srwatson 82189592Sbms#ifndef KTR_IGMPV3 83191657Sbms#define KTR_IGMPV3 KTR_INET 84189592Sbms#endif 8530309Sphk 86189592Sbmsstatic struct igmp_ifinfo * 87189592Sbms igi_alloc_locked(struct ifnet *); 88189592Sbmsstatic void igi_delete_locked(const struct ifnet *); 89189592Sbmsstatic void igmp_dispatch_queue(struct ifqueue *, int, const int); 90189592Sbmsstatic void igmp_fasttimo_vnet(void); 91189592Sbmsstatic void igmp_final_leave(struct in_multi *, struct igmp_ifinfo *); 92189592Sbmsstatic int igmp_handle_state_change(struct in_multi *, 93189592Sbms struct igmp_ifinfo *); 94189592Sbmsstatic int igmp_initial_join(struct in_multi *, struct igmp_ifinfo *); 95193231Sbmsstatic int igmp_input_v1_query(struct ifnet *, const struct ip *, 96193231Sbms const struct igmp *); 97189592Sbmsstatic int igmp_input_v2_query(struct ifnet *, const struct ip *, 98189592Sbms const struct igmp *); 99189592Sbmsstatic int igmp_input_v3_query(struct ifnet *, const struct ip *, 100189592Sbms /*const*/ struct igmpv3 *); 101189592Sbmsstatic int igmp_input_v3_group_query(struct in_multi *, 102189592Sbms struct igmp_ifinfo *, int, /*const*/ struct igmpv3 *); 103189592Sbmsstatic int igmp_input_v1_report(struct ifnet *, /*const*/ struct ip *, 104189592Sbms /*const*/ struct igmp *); 105189592Sbmsstatic int igmp_input_v2_report(struct ifnet *, /*const*/ struct ip *, 106189592Sbms /*const*/ struct igmp *); 107189592Sbmsstatic void igmp_intr(struct mbuf *); 108189592Sbmsstatic int igmp_isgroupreported(const struct in_addr); 109189592Sbmsstatic struct mbuf * 110189592Sbms igmp_ra_alloc(void); 111189592Sbms#ifdef KTR 112189592Sbmsstatic char * igmp_rec_type_to_str(const int); 113185088Szec#endif 114189592Sbmsstatic void igmp_set_version(struct igmp_ifinfo *, const int); 115189592Sbmsstatic void igmp_slowtimo_vnet(void); 116189592Sbmsstatic int igmp_v1v2_queue_report(struct in_multi *, const int); 117189592Sbmsstatic void igmp_v1v2_process_group_timer(struct in_multi *, const int); 118189592Sbmsstatic void igmp_v1v2_process_querier_timers(struct igmp_ifinfo *); 119189592Sbmsstatic void igmp_v2_update_group(struct in_multi *, const int); 120189592Sbmsstatic void igmp_v3_cancel_link_timers(struct igmp_ifinfo *); 121189592Sbmsstatic void igmp_v3_dispatch_general_query(struct igmp_ifinfo *); 122189592Sbmsstatic struct mbuf * 123189592Sbms igmp_v3_encap_report(struct ifnet *, struct mbuf *); 124189592Sbmsstatic int igmp_v3_enqueue_group_record(struct ifqueue *, 125189592Sbms struct in_multi *, const int, const int, const int); 126189592Sbmsstatic int igmp_v3_enqueue_filter_change(struct ifqueue *, 127189592Sbms struct in_multi *); 128189592Sbmsstatic void igmp_v3_process_group_timers(struct igmp_ifinfo *, 129189592Sbms struct ifqueue *, struct ifqueue *, struct in_multi *, 130189592Sbms const int); 131189592Sbmsstatic int igmp_v3_merge_state_changes(struct in_multi *, 132189592Sbms struct ifqueue *); 133189592Sbmsstatic void igmp_v3_suppress_group_record(struct in_multi *); 134189592Sbmsstatic int sysctl_igmp_default_version(SYSCTL_HANDLER_ARGS); 135189592Sbmsstatic int sysctl_igmp_gsr(SYSCTL_HANDLER_ARGS); 136189592Sbmsstatic int sysctl_igmp_ifinfo(SYSCTL_HANDLER_ARGS); 1372531Swollman 138193219Srwatsonstatic const struct netisr_handler igmp_nh = { 139193219Srwatson .nh_name = "igmp", 140193219Srwatson .nh_handler = igmp_intr, 141193219Srwatson .nh_proto = NETISR_IGMP, 142193219Srwatson .nh_policy = NETISR_POLICY_SOURCE, 143193219Srwatson}; 144193219Srwatson 145130333Srwatson/* 146189592Sbms * System-wide globals. 147189592Sbms * 148189592Sbms * Unlocked access to these is OK, except for the global IGMP output 149189592Sbms * queue. The IGMP subsystem lock ends up being system-wide for the moment, 150189592Sbms * because all VIMAGEs have to share a global output queue, as netisrs 151189592Sbms * themselves are not virtualized. 152189592Sbms * 153189592Sbms * Locking: 154189592Sbms * * The permitted lock order is: IN_MULTI_LOCK, IGMP_LOCK, IF_ADDR_LOCK. 155189592Sbms * Any may be taken independently; if any are held at the same 156189592Sbms * time, the above lock order must be followed. 157191264Sbms * * All output is delegated to the netisr. 158191264Sbms * Now that Giant has been eliminated, the netisr may be inlined. 159189592Sbms * * IN_MULTI_LOCK covers in_multi. 160189592Sbms * * IGMP_LOCK covers igmp_ifinfo and any global variables in this file, 161189592Sbms * including the output queue. 162189592Sbms * * IF_ADDR_LOCK covers if_multiaddrs, which is used for a variety of 163189592Sbms * per-link state iterators. 164189592Sbms * * igmp_ifinfo is valid as long as PF_INET is attached to the interface, 165189592Sbms * therefore it is not refcounted. 166189592Sbms * We allow unlocked reads of igmp_ifinfo when accessed via in_multi. 167189592Sbms * 168189592Sbms * Reference counting 169189592Sbms * * IGMP acquires its own reference every time an in_multi is passed to 170189592Sbms * it and the group is being joined for the first time. 171189592Sbms * * IGMP releases its reference(s) on in_multi in a deferred way, 172189592Sbms * because the operations which process the release run as part of 173189592Sbms * a loop whose control variables are directly affected by the release 174189592Sbms * (that, and not recursing on the IF_ADDR_LOCK). 175189592Sbms * 176189592Sbms * VIMAGE: Each in_multi corresponds to an ifp, and each ifp corresponds 177189592Sbms * to a vnet in ifp->if_vnet. 178189592Sbms * 179189931Sbms * SMPng: XXX We may potentially race operations on ifma_protospec. 180189931Sbms * The problem is that we currently lack a clean way of taking the 181189931Sbms * IF_ADDR_LOCK() between the ifnet and in layers w/o recursing, 182189931Sbms * as anything which modifies ifma needs to be covered by that lock. 183189931Sbms * So check for ifma_protospec being NULL before proceeding. 184130333Srwatson */ 185189592Sbmsstruct mtx igmp_mtx; 186189592Sbms 187189592Sbmsstruct mbuf *m_raopt; /* Router Alert option */ 188189592SbmsMALLOC_DEFINE(M_IGMP, "igmp", "igmp state"); 189189592Sbms 190189592Sbms/* 191189592Sbms * VIMAGE-wide globals. 192189592Sbms * 193189592Sbms * The IGMPv3 timers themselves need to run per-image, however, 194189592Sbms * protosw timers run globally (see tcp). 195189592Sbms * An ifnet can only be in one vimage at a time, and the loopback 196189592Sbms * ifnet, loif, is itself virtualized. 197189592Sbms * It would otherwise be possible to seriously hose IGMP state, 198189592Sbms * and create inconsistencies in upstream multicast routing, if you have 199189592Sbms * multiple VIMAGEs running on the same link joining different multicast 200189592Sbms * groups, UNLESS the "primary IP address" is different. This is because 201189592Sbms * IGMP for IPv4 does not force link-local addresses to be used for each 202189592Sbms * node, unlike MLD for IPv6. 203189592Sbms * Obviously the IGMPv3 per-interface state has per-vimage granularity 204189592Sbms * also as a result. 205189592Sbms * 206189592Sbms * FUTURE: Stop using IFP_TO_IA/INADDR_ANY, and use source address selection 207189592Sbms * policy to control the address used by IGMP on the link. 208189592Sbms */ 209195699Srwatsonstatic VNET_DEFINE(int, interface_timers_running); /* IGMPv3 general 210195699Srwatson * query response */ 211195699Srwatsonstatic VNET_DEFINE(int, state_change_timers_running); /* IGMPv3 state-change 212195699Srwatson * retransmit */ 213195699Srwatsonstatic VNET_DEFINE(int, current_state_timers_running); /* IGMPv1/v2 host 214195699Srwatson * report; IGMPv3 g/sg 215195699Srwatson * query response */ 216130333Srwatson 217195727Srwatson#define V_interface_timers_running VNET(interface_timers_running) 218195727Srwatson#define V_state_change_timers_running VNET(state_change_timers_running) 219195727Srwatson#define V_current_state_timers_running VNET(current_state_timers_running) 220189592Sbms 221195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(, igmp_ifinfo), igi_head); 222195782Srwatsonstatic VNET_DEFINE(struct igmpstat, igmpstat) = { 223195782Srwatson .igps_version = IGPS_VERSION_3, 224195782Srwatson .igps_len = sizeof(struct igmpstat), 225195782Srwatson}; 226195699Srwatsonstatic VNET_DEFINE(struct timeval, igmp_gsrdelay) = {10, 0}; 227189592Sbms 228195727Srwatson#define V_igi_head VNET(igi_head) 229195727Srwatson#define V_igmpstat VNET(igmpstat) 230195727Srwatson#define V_igmp_gsrdelay VNET(igmp_gsrdelay) 231195699Srwatson 232195699Srwatsonstatic VNET_DEFINE(int, igmp_recvifkludge) = 1; 233195699Srwatsonstatic VNET_DEFINE(int, igmp_sendra) = 1; 234195699Srwatsonstatic VNET_DEFINE(int, igmp_sendlocal) = 1; 235195699Srwatsonstatic VNET_DEFINE(int, igmp_v1enable) = 1; 236195699Srwatsonstatic VNET_DEFINE(int, igmp_v2enable) = 1; 237195699Srwatsonstatic VNET_DEFINE(int, igmp_legacysupp); 238195699Srwatsonstatic VNET_DEFINE(int, igmp_default_version) = IGMP_VERSION_3; 239195699Srwatson 240195727Srwatson#define V_igmp_recvifkludge VNET(igmp_recvifkludge) 241195727Srwatson#define V_igmp_sendra VNET(igmp_sendra) 242195727Srwatson#define V_igmp_sendlocal VNET(igmp_sendlocal) 243195727Srwatson#define V_igmp_v1enable VNET(igmp_v1enable) 244195727Srwatson#define V_igmp_v2enable VNET(igmp_v2enable) 245195727Srwatson#define V_igmp_legacysupp VNET(igmp_legacysupp) 246195727Srwatson#define V_igmp_default_version VNET(igmp_default_version) 247195699Srwatson 248130333Srwatson/* 249189592Sbms * Virtualized sysctls. 250130333Srwatson */ 251195699SrwatsonSYSCTL_VNET_STRUCT(_net_inet_igmp, IGMPCTL_STATS, stats, CTLFLAG_RW, 252195699Srwatson &VNET_NAME(igmpstat), igmpstat, ""); 253195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, recvifkludge, CTLFLAG_RW, 254195699Srwatson &VNET_NAME(igmp_recvifkludge), 0, 255189592Sbms "Rewrite IGMPv1/v2 reports from 0.0.0.0 to contain subnet address"); 256195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, sendra, CTLFLAG_RW, 257195699Srwatson &VNET_NAME(igmp_sendra), 0, 258189592Sbms "Send IP Router Alert option in IGMPv2/v3 messages"); 259195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, sendlocal, CTLFLAG_RW, 260195699Srwatson &VNET_NAME(igmp_sendlocal), 0, 261189592Sbms "Send IGMP membership reports for 224.0.0.0/24 groups"); 262195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, v1enable, CTLFLAG_RW, 263195699Srwatson &VNET_NAME(igmp_v1enable), 0, 264189592Sbms "Enable backwards compatibility with IGMPv1"); 265195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, v2enable, CTLFLAG_RW, 266195699Srwatson &VNET_NAME(igmp_v2enable), 0, 267189592Sbms "Enable backwards compatibility with IGMPv2"); 268195699SrwatsonSYSCTL_VNET_INT(_net_inet_igmp, OID_AUTO, legacysupp, CTLFLAG_RW, 269195699Srwatson &VNET_NAME(igmp_legacysupp), 0, 270189592Sbms "Allow v1/v2 reports to suppress v3 group responses"); 271195699SrwatsonSYSCTL_VNET_PROC(_net_inet_igmp, OID_AUTO, default_version, 272195699Srwatson CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 273195699Srwatson &VNET_NAME(igmp_default_version), 0, sysctl_igmp_default_version, "I", 274189592Sbms "Default version of IGMP to run on each interface"); 275195699SrwatsonSYSCTL_VNET_PROC(_net_inet_igmp, OID_AUTO, gsrdelay, 276195699Srwatson CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 277195699Srwatson &VNET_NAME(igmp_gsrdelay.tv_sec), 0, sysctl_igmp_gsr, "I", 278189592Sbms "Rate limit for IGMPv3 Group-and-Source queries in seconds"); 279130333Srwatson 280189592Sbms/* 281189592Sbms * Non-virtualized sysctls. 282189592Sbms */ 283189592SbmsSYSCTL_NODE(_net_inet_igmp, OID_AUTO, ifinfo, CTLFLAG_RD | CTLFLAG_MPSAFE, 284189592Sbms sysctl_igmp_ifinfo, "Per-interface IGMPv3 state"); 2851541Srgrimes 286189592Sbmsstatic __inline void 287189592Sbmsigmp_save_context(struct mbuf *m, struct ifnet *ifp) 288189592Sbms{ 289189592Sbms 290189592Sbms#ifdef VIMAGE 291189592Sbms m->m_pkthdr.header = ifp->if_vnet; 292189592Sbms#endif /* VIMAGE */ 293189592Sbms m->m_pkthdr.flowid = ifp->if_index; 294189592Sbms} 295189592Sbms 296189592Sbmsstatic __inline void 297189592Sbmsigmp_scrub_context(struct mbuf *m) 298189592Sbms{ 299189592Sbms 300189592Sbms m->m_pkthdr.header = NULL; 301189592Sbms m->m_pkthdr.flowid = 0; 302189592Sbms} 303189592Sbms 304189592Sbms#ifdef KTR 305189592Sbmsstatic __inline char * 306189592Sbmsinet_ntoa_haddr(in_addr_t haddr) 307189592Sbms{ 308189592Sbms struct in_addr ia; 309189592Sbms 310189592Sbms ia.s_addr = htonl(haddr); 311189592Sbms return (inet_ntoa(ia)); 312189592Sbms} 313119180Srwatson#endif 314119180Srwatson 315189592Sbms/* 316189592Sbms * Restore context from a queued IGMP output chain. 317189592Sbms * Return saved ifindex. 318189592Sbms * 319189592Sbms * VIMAGE: The assertion is there to make sure that we 320189592Sbms * actually called CURVNET_SET() with what's in the mbuf chain. 321189592Sbms */ 322189592Sbmsstatic __inline uint32_t 323189592Sbmsigmp_restore_context(struct mbuf *m) 3241541Srgrimes{ 32514622Sfenner 326189592Sbms#ifdef notyet 327189592Sbms#if defined(VIMAGE) && defined(INVARIANTS) 328189592Sbms KASSERT(curvnet == (m->m_pkthdr.header), 329189592Sbms ("%s: called when curvnet was not restored", __func__)); 330189592Sbms#endif 331189592Sbms#endif 332189592Sbms return (m->m_pkthdr.flowid); 333189592Sbms} 334189592Sbms 335189592Sbms/* 336189592Sbms * Retrieve or set default IGMP version. 337189592Sbms * 338189592Sbms * VIMAGE: Assume curvnet set by caller. 339189592Sbms * SMPng: NOTE: Serialized by IGMP lock. 340189592Sbms */ 341189592Sbmsstatic int 342189592Sbmssysctl_igmp_default_version(SYSCTL_HANDLER_ARGS) 343189592Sbms{ 344189592Sbms int error; 345189592Sbms int new; 346189592Sbms 347189592Sbms error = sysctl_wire_old_buffer(req, sizeof(int)); 348189592Sbms if (error) 349189592Sbms return (error); 350189592Sbms 351189592Sbms IGMP_LOCK(); 352189592Sbms 353189592Sbms new = V_igmp_default_version; 354189592Sbms 355189592Sbms error = sysctl_handle_int(oidp, &new, 0, req); 356189592Sbms if (error || !req->newptr) 357189592Sbms goto out_locked; 358189592Sbms 359189592Sbms if (new < IGMP_VERSION_1 || new > IGMP_VERSION_3) { 360189592Sbms error = EINVAL; 361189592Sbms goto out_locked; 362189592Sbms } 363189592Sbms 364189592Sbms CTR2(KTR_IGMPV3, "change igmp_default_version from %d to %d", 365189592Sbms V_igmp_default_version, new); 366189592Sbms 367189592Sbms V_igmp_default_version = new; 368189592Sbms 369189592Sbmsout_locked: 370189592Sbms IGMP_UNLOCK(); 371189592Sbms return (error); 372189592Sbms} 373189592Sbms 374189592Sbms/* 375189592Sbms * Retrieve or set threshold between group-source queries in seconds. 376189592Sbms * 377189592Sbms * VIMAGE: Assume curvnet set by caller. 378189592Sbms * SMPng: NOTE: Serialized by IGMP lock. 379189592Sbms */ 380189592Sbmsstatic int 381189592Sbmssysctl_igmp_gsr(SYSCTL_HANDLER_ARGS) 382189592Sbms{ 383189592Sbms int error; 384189592Sbms int i; 385189592Sbms 386189592Sbms error = sysctl_wire_old_buffer(req, sizeof(int)); 387189592Sbms if (error) 388189592Sbms return (error); 389189592Sbms 390189592Sbms IGMP_LOCK(); 391189592Sbms 392189592Sbms i = V_igmp_gsrdelay.tv_sec; 393189592Sbms 394189592Sbms error = sysctl_handle_int(oidp, &i, 0, req); 395189592Sbms if (error || !req->newptr) 396189592Sbms goto out_locked; 397189592Sbms 398189592Sbms if (i < -1 || i >= 60) { 399189592Sbms error = EINVAL; 400189592Sbms goto out_locked; 401189592Sbms } 402189592Sbms 403189592Sbms CTR2(KTR_IGMPV3, "change igmp_gsrdelay from %d to %d", 404189592Sbms V_igmp_gsrdelay.tv_sec, i); 405189592Sbms V_igmp_gsrdelay.tv_sec = i; 406189592Sbms 407189592Sbmsout_locked: 408189592Sbms IGMP_UNLOCK(); 409189592Sbms return (error); 410189592Sbms} 411189592Sbms 412189592Sbms/* 413189592Sbms * Expose struct igmp_ifinfo to userland, keyed by ifindex. 414189592Sbms * For use by ifmcstat(8). 415189592Sbms * 416189592Sbms * SMPng: NOTE: Does an unlocked ifindex space read. 417189592Sbms * VIMAGE: Assume curvnet set by caller. The node handler itself 418189592Sbms * is not directly virtualized. 419189592Sbms */ 420189592Sbmsstatic int 421189592Sbmssysctl_igmp_ifinfo(SYSCTL_HANDLER_ARGS) 422189592Sbms{ 423189592Sbms int *name; 424189592Sbms int error; 425189592Sbms u_int namelen; 426189592Sbms struct ifnet *ifp; 427189592Sbms struct igmp_ifinfo *igi; 428189592Sbms 429189592Sbms name = (int *)arg1; 430189592Sbms namelen = arg2; 431189592Sbms 432189592Sbms if (req->newptr != NULL) 433189592Sbms return (EPERM); 434189592Sbms 435189592Sbms if (namelen != 1) 436189592Sbms return (EINVAL); 437189592Sbms 438189592Sbms error = sysctl_wire_old_buffer(req, sizeof(struct igmp_ifinfo)); 439189592Sbms if (error) 440189592Sbms return (error); 441189592Sbms 442189592Sbms IN_MULTI_LOCK(); 443189592Sbms IGMP_LOCK(); 444189592Sbms 445189592Sbms if (name[0] <= 0 || name[0] > V_if_index) { 446189592Sbms error = ENOENT; 447189592Sbms goto out_locked; 448189592Sbms } 449189592Sbms 450189592Sbms error = ENOENT; 451189592Sbms 452189592Sbms ifp = ifnet_byindex(name[0]); 453189592Sbms if (ifp == NULL) 454189592Sbms goto out_locked; 455189592Sbms 456189592Sbms LIST_FOREACH(igi, &V_igi_head, igi_link) { 457189592Sbms if (ifp == igi->igi_ifp) { 458189592Sbms error = SYSCTL_OUT(req, igi, 459189592Sbms sizeof(struct igmp_ifinfo)); 460189592Sbms break; 461189592Sbms } 462189592Sbms } 463189592Sbms 464189592Sbmsout_locked: 465189592Sbms IGMP_UNLOCK(); 466189592Sbms IN_MULTI_UNLOCK(); 467189592Sbms return (error); 468189592Sbms} 469189592Sbms 470189592Sbms/* 471189592Sbms * Dispatch an entire queue of pending packet chains 472189592Sbms * using the netisr. 473189592Sbms * VIMAGE: Assumes the vnet pointer has been set. 474189592Sbms */ 475189592Sbmsstatic void 476189592Sbmsigmp_dispatch_queue(struct ifqueue *ifq, int limit, const int loop) 477189592Sbms{ 478189592Sbms struct mbuf *m; 479189592Sbms 480189592Sbms for (;;) { 481189592Sbms _IF_DEQUEUE(ifq, m); 482189592Sbms if (m == NULL) 483189592Sbms break; 484189592Sbms CTR3(KTR_IGMPV3, "%s: dispatch %p from %p", __func__, ifq, m); 485189592Sbms if (loop) 486189592Sbms m->m_flags |= M_IGMP_LOOP; 487189592Sbms netisr_dispatch(NETISR_IGMP, m); 488189592Sbms if (--limit == 0) 489189592Sbms break; 490189592Sbms } 491189592Sbms} 492189592Sbms 493189592Sbms/* 494189592Sbms * Filter outgoing IGMP report state by group. 495189592Sbms * 496189592Sbms * Reports are ALWAYS suppressed for ALL-HOSTS (224.0.0.1). 497189592Sbms * If the net.inet.igmp.sendlocal sysctl is 0, then IGMP reports are 498189592Sbms * disabled for all groups in the 224.0.0.0/24 link-local scope. However, 499189592Sbms * this may break certain IGMP snooping switches which rely on the old 500189592Sbms * report behaviour. 501189592Sbms * 502189592Sbms * Return zero if the given group is one for which IGMP reports 503189592Sbms * should be suppressed, or non-zero if reports should be issued. 504189592Sbms */ 505189592Sbmsstatic __inline int 506189592Sbmsigmp_isgroupreported(const struct in_addr addr) 507189592Sbms{ 508189592Sbms 509189592Sbms if (in_allhosts(addr) || 510189592Sbms ((!V_igmp_sendlocal && IN_LOCAL_GROUP(ntohl(addr.s_addr))))) 511189592Sbms return (0); 512189592Sbms 513189592Sbms return (1); 514189592Sbms} 515189592Sbms 516189592Sbms/* 517189592Sbms * Construct a Router Alert option to use in outgoing packets. 518189592Sbms */ 519189592Sbmsstatic struct mbuf * 520189592Sbmsigmp_ra_alloc(void) 521189592Sbms{ 522189592Sbms struct mbuf *m; 523189592Sbms struct ipoption *p; 524189592Sbms 525189592Sbms MGET(m, M_DONTWAIT, MT_DATA); 526189592Sbms p = mtod(m, struct ipoption *); 527189592Sbms p->ipopt_dst.s_addr = INADDR_ANY; 528189592Sbms p->ipopt_list[0] = IPOPT_RA; /* Router Alert Option */ 529189592Sbms p->ipopt_list[1] = 0x04; /* 4 bytes long */ 530189592Sbms p->ipopt_list[2] = IPOPT_EOL; /* End of IP option list */ 531189592Sbms p->ipopt_list[3] = 0x00; /* pad byte */ 532189592Sbms m->m_len = sizeof(p->ipopt_dst) + p->ipopt_list[1]; 533189592Sbms 534189592Sbms return (m); 535189592Sbms} 536189592Sbms 537189592Sbms/* 538189592Sbms * Attach IGMP when PF_INET is attached to an interface. 539189592Sbms */ 540189592Sbmsstruct igmp_ifinfo * 541189592Sbmsigmp_domifattach(struct ifnet *ifp) 542189592Sbms{ 543189592Sbms struct igmp_ifinfo *igi; 544189592Sbms 545189592Sbms CTR3(KTR_IGMPV3, "%s: called for ifp %p(%s)", 546189592Sbms __func__, ifp, ifp->if_xname); 547189592Sbms 548189592Sbms IGMP_LOCK(); 549189592Sbms 550189592Sbms igi = igi_alloc_locked(ifp); 551189592Sbms if (!(ifp->if_flags & IFF_MULTICAST)) 552189592Sbms igi->igi_flags |= IGIF_SILENT; 553189592Sbms 554189592Sbms IGMP_UNLOCK(); 555189592Sbms 556189592Sbms return (igi); 557189592Sbms} 558189592Sbms 559189592Sbms/* 560189592Sbms * VIMAGE: assume curvnet set by caller. 561189592Sbms */ 562189592Sbmsstatic struct igmp_ifinfo * 563189592Sbmsigi_alloc_locked(/*const*/ struct ifnet *ifp) 564189592Sbms{ 565189592Sbms struct igmp_ifinfo *igi; 566189592Sbms 567189592Sbms IGMP_LOCK_ASSERT(); 568189592Sbms 569189592Sbms igi = malloc(sizeof(struct igmp_ifinfo), M_IGMP, M_NOWAIT|M_ZERO); 570189592Sbms if (igi == NULL) 571189592Sbms goto out; 572189592Sbms 573189592Sbms igi->igi_ifp = ifp; 574189592Sbms igi->igi_version = V_igmp_default_version; 575189592Sbms igi->igi_flags = 0; 576189592Sbms igi->igi_rv = IGMP_RV_INIT; 577189592Sbms igi->igi_qi = IGMP_QI_INIT; 578189592Sbms igi->igi_qri = IGMP_QRI_INIT; 579189592Sbms igi->igi_uri = IGMP_URI_INIT; 580189592Sbms 581189592Sbms SLIST_INIT(&igi->igi_relinmhead); 582189592Sbms 5831541Srgrimes /* 584189592Sbms * Responses to general queries are subject to bounds. 5851541Srgrimes */ 586189592Sbms IFQ_SET_MAXLEN(&igi->igi_gq, IGMP_MAX_RESPONSE_PACKETS); 5879209Swollman 588189592Sbms LIST_INSERT_HEAD(&V_igi_head, igi, igi_link); 5899209Swollman 590189592Sbms CTR2(KTR_IGMPV3, "allocate igmp_ifinfo for ifp %p(%s)", 591189592Sbms ifp, ifp->if_xname); 592189592Sbms 593189592Sbmsout: 594189592Sbms return (igi); 595189592Sbms} 596189592Sbms 597189592Sbms/* 598189592Sbms * Hook for ifdetach. 599189592Sbms * 600189592Sbms * NOTE: Some finalization tasks need to run before the protocol domain 601189592Sbms * is detached, but also before the link layer does its cleanup. 602189592Sbms * 603189592Sbms * SMPNG: igmp_ifdetach() needs to take IF_ADDR_LOCK(). 604189931Sbms * XXX This is also bitten by unlocked ifma_protospec access. 605189592Sbms */ 606189592Sbmsvoid 607189592Sbmsigmp_ifdetach(struct ifnet *ifp) 608189592Sbms{ 609189592Sbms struct igmp_ifinfo *igi; 610189592Sbms struct ifmultiaddr *ifma; 611189592Sbms struct in_multi *inm, *tinm; 612189592Sbms 613189592Sbms CTR3(KTR_IGMPV3, "%s: called for ifp %p(%s)", __func__, ifp, 614189592Sbms ifp->if_xname); 615189592Sbms 616189592Sbms IGMP_LOCK(); 617189592Sbms 618189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 619189592Sbms if (igi->igi_version == IGMP_VERSION_3) { 620189592Sbms IF_ADDR_LOCK(ifp); 621189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 622189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 623189931Sbms ifma->ifma_protospec == NULL) 624189592Sbms continue; 625189931Sbms#if 0 626189931Sbms KASSERT(ifma->ifma_protospec != NULL, 627189931Sbms ("%s: ifma_protospec is NULL", __func__)); 628189931Sbms#endif 629189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 630189592Sbms if (inm->inm_state == IGMP_LEAVING_MEMBER) { 631189592Sbms SLIST_INSERT_HEAD(&igi->igi_relinmhead, 632189592Sbms inm, inm_nrele); 633189592Sbms } 634189592Sbms inm_clear_recorded(inm); 635189592Sbms } 636189592Sbms IF_ADDR_UNLOCK(ifp); 637189592Sbms /* 638189592Sbms * Free the in_multi reference(s) for this IGMP lifecycle. 639189592Sbms */ 640189592Sbms SLIST_FOREACH_SAFE(inm, &igi->igi_relinmhead, inm_nrele, 641189592Sbms tinm) { 642189592Sbms SLIST_REMOVE_HEAD(&igi->igi_relinmhead, inm_nrele); 643189592Sbms inm_release_locked(inm); 644189592Sbms } 645189592Sbms } 646189592Sbms 647189592Sbms IGMP_UNLOCK(); 6481541Srgrimes} 6491541Srgrimes 650189592Sbms/* 651189592Sbms * Hook for domifdetach. 652189592Sbms */ 653189592Sbmsvoid 654189592Sbmsigmp_domifdetach(struct ifnet *ifp) 6552531Swollman{ 656189592Sbms struct igmp_ifinfo *igi; 657189592Sbms 658189592Sbms CTR3(KTR_IGMPV3, "%s: called for ifp %p(%s)", 659189592Sbms __func__, ifp, ifp->if_xname); 660189592Sbms 661189592Sbms IGMP_LOCK(); 662189592Sbms 663189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 664189592Sbms igi_delete_locked(ifp); 665189592Sbms 666189592Sbms IGMP_UNLOCK(); 667189592Sbms} 668189592Sbms 669189592Sbmsstatic void 670189592Sbmsigi_delete_locked(const struct ifnet *ifp) 671189592Sbms{ 672189592Sbms struct igmp_ifinfo *igi, *tigi; 673189592Sbms 674189592Sbms CTR3(KTR_IGMPV3, "%s: freeing igmp_ifinfo for ifp %p(%s)", 675189592Sbms __func__, ifp, ifp->if_xname); 676189592Sbms 677189592Sbms IGMP_LOCK_ASSERT(); 678189592Sbms 679189592Sbms LIST_FOREACH_SAFE(igi, &V_igi_head, igi_link, tigi) { 680189592Sbms if (igi->igi_ifp == ifp) { 681189592Sbms /* 682189592Sbms * Free deferred General Query responses. 683189592Sbms */ 684189592Sbms _IF_DRAIN(&igi->igi_gq); 685189592Sbms 686189592Sbms LIST_REMOVE(igi, igi_link); 687189592Sbms 688189592Sbms KASSERT(SLIST_EMPTY(&igi->igi_relinmhead), 689189592Sbms ("%s: there are dangling in_multi references", 690189592Sbms __func__)); 691189592Sbms 692189592Sbms free(igi, M_IGMP); 693189592Sbms return; 694189592Sbms } 695189592Sbms } 696189592Sbms 697189592Sbms#ifdef INVARIANTS 698189592Sbms panic("%s: igmp_ifinfo not found for ifp %p\n", __func__, ifp); 699189592Sbms#endif 700189592Sbms} 701189592Sbms 702189592Sbms/* 703189592Sbms * Process a received IGMPv1 query. 704189592Sbms * Return non-zero if the message should be dropped. 705189592Sbms * 706189592Sbms * VIMAGE: The curvnet pointer is derived from the input ifp. 707189592Sbms */ 708189592Sbmsstatic int 709193231Sbmsigmp_input_v1_query(struct ifnet *ifp, const struct ip *ip, 710193231Sbms const struct igmp *igmp) 711189592Sbms{ 712189592Sbms struct ifmultiaddr *ifma; 713189592Sbms struct igmp_ifinfo *igi; 714189592Sbms struct in_multi *inm; 7152531Swollman 716189592Sbms /* 717193231Sbms * IGMPv1 Host Mmembership Queries SHOULD always be addressed to 718193231Sbms * 224.0.0.1. They are always treated as General Queries. 719189592Sbms * igmp_group is always ignored. Do not drop it as a userland 720189592Sbms * daemon may wish to see it. 721193231Sbms * XXX SMPng: unlocked increments in igmpstat assumed atomic. 722189592Sbms */ 723193231Sbms if (!in_allhosts(ip->ip_dst) || !in_nullhost(igmp->igmp_group)) { 724190965Srwatson IGMPSTAT_INC(igps_rcv_badqueries); 725189592Sbms return (0); 726189592Sbms } 727190965Srwatson IGMPSTAT_INC(igps_rcv_gen_queries); 728189592Sbms 729189592Sbms IN_MULTI_LOCK(); 730189592Sbms IGMP_LOCK(); 731189592Sbms 732189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 733189592Sbms KASSERT(igi != NULL, ("%s: no igmp_ifinfo for ifp %p", __func__, ifp)); 734189592Sbms 735189592Sbms if (igi->igi_flags & IGIF_LOOPBACK) { 736189592Sbms CTR2(KTR_IGMPV3, "ignore v1 query on IGIF_LOOPBACK ifp %p(%s)", 737189592Sbms ifp, ifp->if_xname); 738189592Sbms goto out_locked; 739189592Sbms } 740189592Sbms 741193231Sbms /* 742193231Sbms * Switch to IGMPv1 host compatibility mode. 743193231Sbms */ 744189592Sbms igmp_set_version(igi, IGMP_VERSION_1); 745189592Sbms 746189592Sbms CTR2(KTR_IGMPV3, "process v1 query on ifp %p(%s)", ifp, ifp->if_xname); 747189592Sbms 748189592Sbms /* 749189592Sbms * Start the timers in all of our group records 750189592Sbms * for the interface on which the query arrived, 751189592Sbms * except those which are already running. 752189592Sbms */ 753189592Sbms IF_ADDR_LOCK(ifp); 754189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 755189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 756189931Sbms ifma->ifma_protospec == NULL) 757189592Sbms continue; 758189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 759189592Sbms if (inm->inm_timer != 0) 760189592Sbms continue; 761189592Sbms switch (inm->inm_state) { 762189592Sbms case IGMP_NOT_MEMBER: 763189592Sbms case IGMP_SILENT_MEMBER: 764189592Sbms break; 765189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 766189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 767189592Sbms case IGMP_REPORTING_MEMBER: 768189592Sbms case IGMP_IDLE_MEMBER: 769189592Sbms case IGMP_LAZY_MEMBER: 770189592Sbms case IGMP_SLEEPING_MEMBER: 771189592Sbms case IGMP_AWAKENING_MEMBER: 772189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 773189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY( 774189592Sbms IGMP_V1V2_MAX_RI * PR_FASTHZ); 775189592Sbms V_current_state_timers_running = 1; 776189592Sbms break; 777189592Sbms case IGMP_LEAVING_MEMBER: 778189592Sbms break; 779119181Srwatson } 780119181Srwatson } 781189592Sbms IF_ADDR_UNLOCK(ifp); 782189592Sbms 783189592Sbmsout_locked: 784189592Sbms IGMP_UNLOCK(); 785189592Sbms IN_MULTI_UNLOCK(); 786189592Sbms 787189592Sbms return (0); 788189592Sbms} 789189592Sbms 790189592Sbms/* 791189592Sbms * Process a received IGMPv2 general or group-specific query. 792189592Sbms */ 793189592Sbmsstatic int 794189592Sbmsigmp_input_v2_query(struct ifnet *ifp, const struct ip *ip, 795189592Sbms const struct igmp *igmp) 796189592Sbms{ 797189592Sbms struct ifmultiaddr *ifma; 798189592Sbms struct igmp_ifinfo *igi; 799189592Sbms struct in_multi *inm; 800193231Sbms int is_general_query; 801189592Sbms uint16_t timer; 802189592Sbms 803193231Sbms is_general_query = 0; 804193231Sbms 805189592Sbms /* 806193231Sbms * Validate address fields upfront. 807193231Sbms * XXX SMPng: unlocked increments in igmpstat assumed atomic. 808189592Sbms */ 809193231Sbms if (in_nullhost(igmp->igmp_group)) { 810193231Sbms /* 811193231Sbms * IGMPv2 General Query. 812193231Sbms * If this was not sent to the all-hosts group, ignore it. 813193231Sbms */ 814193231Sbms if (!in_allhosts(ip->ip_dst)) 815193231Sbms return (0); 816193231Sbms IGMPSTAT_INC(igps_rcv_gen_queries); 817193231Sbms is_general_query = 1; 818193231Sbms } else { 819193231Sbms /* IGMPv2 Group-Specific Query. */ 820193231Sbms IGMPSTAT_INC(igps_rcv_group_queries); 821193231Sbms } 822193231Sbms 823189592Sbms IN_MULTI_LOCK(); 824189592Sbms IGMP_LOCK(); 825189592Sbms 826189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 827189592Sbms KASSERT(igi != NULL, ("%s: no igmp_ifinfo for ifp %p", __func__, ifp)); 828189592Sbms 829189592Sbms if (igi->igi_flags & IGIF_LOOPBACK) { 830189592Sbms CTR2(KTR_IGMPV3, "ignore v2 query on IGIF_LOOPBACK ifp %p(%s)", 831189592Sbms ifp, ifp->if_xname); 832189592Sbms goto out_locked; 833144163Ssam } 834189592Sbms 835193231Sbms /* 836193231Sbms * Ignore v2 query if in v1 Compatibility Mode. 837193231Sbms */ 838193231Sbms if (igi->igi_version == IGMP_VERSION_1) 839193231Sbms goto out_locked; 840193231Sbms 841189592Sbms igmp_set_version(igi, IGMP_VERSION_2); 842189592Sbms 843189592Sbms timer = igmp->igmp_code * PR_FASTHZ / IGMP_TIMER_SCALE; 844189592Sbms if (timer == 0) 845189592Sbms timer = 1; 846189592Sbms 847193231Sbms if (is_general_query) { 848189592Sbms /* 849193231Sbms * For each reporting group joined on this 850193231Sbms * interface, kick the report timer. 851193231Sbms */ 852193231Sbms CTR2(KTR_IGMPV3, "process v2 general query on ifp %p(%s)", 853193231Sbms ifp, ifp->if_xname); 854193231Sbms IF_ADDR_LOCK(ifp); 855193231Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 856193231Sbms if (ifma->ifma_addr->sa_family != AF_INET || 857193231Sbms ifma->ifma_protospec == NULL) 858193231Sbms continue; 859193231Sbms inm = (struct in_multi *)ifma->ifma_protospec; 860193231Sbms igmp_v2_update_group(inm, timer); 861193231Sbms } 862193231Sbms IF_ADDR_UNLOCK(ifp); 863193231Sbms } else { 864193231Sbms /* 865193231Sbms * Group-specific IGMPv2 query, we need only 866189592Sbms * look up the single group to process it. 867189592Sbms */ 868189592Sbms inm = inm_lookup(ifp, igmp->igmp_group); 869189592Sbms if (inm != NULL) { 870189592Sbms CTR3(KTR_IGMPV3, "process v2 query %s on ifp %p(%s)", 871189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 872189592Sbms igmp_v2_update_group(inm, timer); 873189592Sbms } 874189592Sbms } 875189592Sbms 876189592Sbmsout_locked: 877189592Sbms IGMP_UNLOCK(); 878189592Sbms IN_MULTI_UNLOCK(); 879189592Sbms 880189592Sbms return (0); 8812531Swollman} 8822531Swollman 883189592Sbms/* 884189592Sbms * Update the report timer on a group in response to an IGMPv2 query. 885189592Sbms * 886189592Sbms * If we are becoming the reporting member for this group, start the timer. 887189592Sbms * If we already are the reporting member for this group, and timer is 888189592Sbms * below the threshold, reset it. 889189592Sbms * 890189592Sbms * We may be updating the group for the first time since we switched 891189592Sbms * to IGMPv3. If we are, then we must clear any recorded source lists, 892189592Sbms * and transition to REPORTING state; the group timer is overloaded 893189592Sbms * for group and group-source query responses. 894189592Sbms * 895189592Sbms * Unlike IGMPv3, the delay per group should be jittered 896189592Sbms * to avoid bursts of IGMPv2 reports. 897189592Sbms */ 898189592Sbmsstatic void 899189592Sbmsigmp_v2_update_group(struct in_multi *inm, const int timer) 900189592Sbms{ 901189592Sbms 902189592Sbms CTR4(KTR_IGMPV3, "%s: %s/%s timer=%d", __func__, 903189592Sbms inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname, timer); 904189592Sbms 905189592Sbms IN_MULTI_LOCK_ASSERT(); 906189592Sbms 907189592Sbms switch (inm->inm_state) { 908189592Sbms case IGMP_NOT_MEMBER: 909189592Sbms case IGMP_SILENT_MEMBER: 910189592Sbms break; 911189592Sbms case IGMP_REPORTING_MEMBER: 912189592Sbms if (inm->inm_timer != 0 && 913189592Sbms inm->inm_timer <= timer) { 914189592Sbms CTR1(KTR_IGMPV3, "%s: REPORTING and timer running, " 915189592Sbms "skipping.", __func__); 916189592Sbms break; 917189592Sbms } 918189592Sbms /* FALLTHROUGH */ 919189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 920189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 921189592Sbms case IGMP_IDLE_MEMBER: 922189592Sbms case IGMP_LAZY_MEMBER: 923189592Sbms case IGMP_AWAKENING_MEMBER: 924189592Sbms CTR1(KTR_IGMPV3, "%s: ->REPORTING", __func__); 925189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 926189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY(timer); 927189592Sbms V_current_state_timers_running = 1; 928189592Sbms break; 929189592Sbms case IGMP_SLEEPING_MEMBER: 930189592Sbms CTR1(KTR_IGMPV3, "%s: ->AWAKENING", __func__); 931189592Sbms inm->inm_state = IGMP_AWAKENING_MEMBER; 932189592Sbms break; 933189592Sbms case IGMP_LEAVING_MEMBER: 934189592Sbms break; 935189592Sbms } 936189592Sbms} 937189592Sbms 938189592Sbms/* 939189592Sbms * Process a received IGMPv3 general, group-specific or 940189592Sbms * group-and-source-specific query. 941189592Sbms * Assumes m has already been pulled up to the full IGMP message length. 942189592Sbms * Return 0 if successful, otherwise an appropriate error code is returned. 943189592Sbms */ 944189592Sbmsstatic int 945189592Sbmsigmp_input_v3_query(struct ifnet *ifp, const struct ip *ip, 946189592Sbms /*const*/ struct igmpv3 *igmpv3) 947189592Sbms{ 948189592Sbms struct igmp_ifinfo *igi; 949189592Sbms struct in_multi *inm; 950193231Sbms int is_general_query; 951189592Sbms uint32_t maxresp, nsrc, qqi; 952189592Sbms uint16_t timer; 953189592Sbms uint8_t qrv; 954189592Sbms 955193231Sbms is_general_query = 0; 956193231Sbms 957189592Sbms CTR2(KTR_IGMPV3, "process v3 query on ifp %p(%s)", ifp, ifp->if_xname); 958189592Sbms 959189592Sbms maxresp = igmpv3->igmp_code; /* in 1/10ths of a second */ 960189592Sbms if (maxresp >= 128) { 961189592Sbms maxresp = IGMP_MANT(igmpv3->igmp_code) << 962189592Sbms (IGMP_EXP(igmpv3->igmp_code) + 3); 963189592Sbms } 964189592Sbms 965189592Sbms /* 966189592Sbms * Robustness must never be less than 2 for on-wire IGMPv3. 967193231Sbms * FUTURE: Check if ifp has IGIF_LOOPBACK set, as we will make 968189592Sbms * an exception for interfaces whose IGMPv3 state changes 969189592Sbms * are redirected to loopback (e.g. MANET). 970189592Sbms */ 971189592Sbms qrv = IGMP_QRV(igmpv3->igmp_misc); 972189592Sbms if (qrv < 2) { 973189592Sbms CTR3(KTR_IGMPV3, "%s: clamping qrv %d to %d", __func__, 974189592Sbms qrv, IGMP_RV_INIT); 975189592Sbms qrv = IGMP_RV_INIT; 976189592Sbms } 977189592Sbms 978189592Sbms qqi = igmpv3->igmp_qqi; 979189592Sbms if (qqi >= 128) { 980190691Sbms qqi = IGMP_MANT(igmpv3->igmp_qqi) << 981190691Sbms (IGMP_EXP(igmpv3->igmp_qqi) + 3); 982189592Sbms } 983189592Sbms 984189592Sbms timer = maxresp * PR_FASTHZ / IGMP_TIMER_SCALE; 985189592Sbms if (timer == 0) 986189592Sbms timer = 1; 987189592Sbms 988189592Sbms nsrc = ntohs(igmpv3->igmp_numsrc); 989189592Sbms 990193231Sbms /* 991193231Sbms * Validate address fields and versions upfront before 992193231Sbms * accepting v3 query. 993193231Sbms * XXX SMPng: Unlocked access to igmpstat counters here. 994193231Sbms */ 995193231Sbms if (in_nullhost(igmpv3->igmp_group)) { 996193231Sbms /* 997193231Sbms * IGMPv3 General Query. 998193231Sbms * 999193231Sbms * General Queries SHOULD be directed to 224.0.0.1. 1000193231Sbms * A general query with a source list has undefined 1001193231Sbms * behaviour; discard it. 1002193231Sbms */ 1003193231Sbms IGMPSTAT_INC(igps_rcv_gen_queries); 1004193231Sbms if (!in_allhosts(ip->ip_dst) || nsrc > 0) { 1005193231Sbms IGMPSTAT_INC(igps_rcv_badqueries); 1006193231Sbms return (0); 1007193231Sbms } 1008193231Sbms is_general_query = 1; 1009193231Sbms } else { 1010193231Sbms /* Group or group-source specific query. */ 1011193231Sbms if (nsrc == 0) 1012193231Sbms IGMPSTAT_INC(igps_rcv_group_queries); 1013193231Sbms else 1014193231Sbms IGMPSTAT_INC(igps_rcv_gsr_queries); 1015193231Sbms } 1016193231Sbms 1017189592Sbms IN_MULTI_LOCK(); 1018189592Sbms IGMP_LOCK(); 1019189592Sbms 1020189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 1021189592Sbms KASSERT(igi != NULL, ("%s: no igmp_ifinfo for ifp %p", __func__, ifp)); 1022189592Sbms 1023189592Sbms if (igi->igi_flags & IGIF_LOOPBACK) { 1024189592Sbms CTR2(KTR_IGMPV3, "ignore v3 query on IGIF_LOOPBACK ifp %p(%s)", 1025189592Sbms ifp, ifp->if_xname); 1026189592Sbms goto out_locked; 1027189592Sbms } 1028189592Sbms 1029193231Sbms /* 1030193231Sbms * Discard the v3 query if we're in Compatibility Mode. 1031193231Sbms * The RFC is not obviously worded that hosts need to stay in 1032193231Sbms * compatibility mode until the Old Version Querier Present 1033193231Sbms * timer expires. 1034193231Sbms */ 1035193231Sbms if (igi->igi_version != IGMP_VERSION_3) { 1036193231Sbms CTR3(KTR_IGMPV3, "ignore v3 query in v%d mode on ifp %p(%s)", 1037193231Sbms igi->igi_version, ifp, ifp->if_xname); 1038193231Sbms goto out_locked; 1039193231Sbms } 1040193231Sbms 1041189592Sbms igmp_set_version(igi, IGMP_VERSION_3); 1042189592Sbms igi->igi_rv = qrv; 1043189592Sbms igi->igi_qi = qqi; 1044189592Sbms igi->igi_qri = maxresp; 1045189592Sbms 1046189592Sbms CTR4(KTR_IGMPV3, "%s: qrv %d qi %d qri %d", __func__, qrv, qqi, 1047189592Sbms maxresp); 1048189592Sbms 1049193231Sbms if (is_general_query) { 1050189592Sbms /* 1051189592Sbms * Schedule a current-state report on this ifp for 1052189592Sbms * all groups, possibly containing source lists. 1053189592Sbms * If there is a pending General Query response 1054189592Sbms * scheduled earlier than the selected delay, do 1055189592Sbms * not schedule any other reports. 1056189592Sbms * Otherwise, reset the interface timer. 1057189592Sbms */ 1058193231Sbms CTR2(KTR_IGMPV3, "process v3 general query on ifp %p(%s)", 1059193231Sbms ifp, ifp->if_xname); 1060189592Sbms if (igi->igi_v3_timer == 0 || igi->igi_v3_timer >= timer) { 1061189592Sbms igi->igi_v3_timer = IGMP_RANDOM_DELAY(timer); 1062189592Sbms V_interface_timers_running = 1; 1063189592Sbms } 1064189592Sbms } else { 1065189592Sbms /* 1066189592Sbms * Group-source-specific queries are throttled on 1067189592Sbms * a per-group basis to defeat denial-of-service attempts. 1068189592Sbms * Queries for groups we are not a member of on this 1069189592Sbms * link are simply ignored. 1070189592Sbms */ 1071189592Sbms inm = inm_lookup(ifp, igmpv3->igmp_group); 1072189592Sbms if (inm == NULL) 1073189592Sbms goto out_locked; 1074189592Sbms if (nsrc > 0) { 1075189592Sbms if (!ratecheck(&inm->inm_lastgsrtv, 1076189592Sbms &V_igmp_gsrdelay)) { 1077189592Sbms CTR1(KTR_IGMPV3, "%s: GS query throttled.", 1078189592Sbms __func__); 1079190965Srwatson IGMPSTAT_INC(igps_drop_gsr_queries); 1080189592Sbms goto out_locked; 1081189592Sbms } 1082189592Sbms } 1083189592Sbms CTR3(KTR_IGMPV3, "process v3 %s query on ifp %p(%s)", 1084189592Sbms inet_ntoa(igmpv3->igmp_group), ifp, ifp->if_xname); 1085189592Sbms /* 1086189592Sbms * If there is a pending General Query response 1087189592Sbms * scheduled sooner than the selected delay, no 1088189592Sbms * further report need be scheduled. 1089189592Sbms * Otherwise, prepare to respond to the 1090189592Sbms * group-specific or group-and-source query. 1091189592Sbms */ 1092189592Sbms if (igi->igi_v3_timer == 0 || igi->igi_v3_timer >= timer) 1093189592Sbms igmp_input_v3_group_query(inm, igi, timer, igmpv3); 1094189592Sbms } 1095189592Sbms 1096189592Sbmsout_locked: 1097189592Sbms IGMP_UNLOCK(); 1098189592Sbms IN_MULTI_UNLOCK(); 1099189592Sbms 1100189592Sbms return (0); 1101189592Sbms} 1102189592Sbms 1103189592Sbms/* 1104189592Sbms * Process a recieved IGMPv3 group-specific or group-and-source-specific 1105189592Sbms * query. 1106189592Sbms * Return <0 if any error occured. Currently this is ignored. 1107189592Sbms */ 1108189592Sbmsstatic int 1109189592Sbmsigmp_input_v3_group_query(struct in_multi *inm, struct igmp_ifinfo *igi, 1110189592Sbms int timer, /*const*/ struct igmpv3 *igmpv3) 1111189592Sbms{ 1112189592Sbms int retval; 1113189592Sbms uint16_t nsrc; 1114189592Sbms 1115189592Sbms IN_MULTI_LOCK_ASSERT(); 1116189592Sbms IGMP_LOCK_ASSERT(); 1117189592Sbms 1118189592Sbms retval = 0; 1119189592Sbms 1120189592Sbms switch (inm->inm_state) { 1121189592Sbms case IGMP_NOT_MEMBER: 1122189592Sbms case IGMP_SILENT_MEMBER: 1123189592Sbms case IGMP_SLEEPING_MEMBER: 1124189592Sbms case IGMP_LAZY_MEMBER: 1125189592Sbms case IGMP_AWAKENING_MEMBER: 1126189592Sbms case IGMP_IDLE_MEMBER: 1127189592Sbms case IGMP_LEAVING_MEMBER: 1128189592Sbms return (retval); 1129189592Sbms break; 1130189592Sbms case IGMP_REPORTING_MEMBER: 1131189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 1132189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 1133189592Sbms break; 1134189592Sbms } 1135189592Sbms 1136189592Sbms nsrc = ntohs(igmpv3->igmp_numsrc); 1137189592Sbms 1138189592Sbms /* 1139189592Sbms * Deal with group-specific queries upfront. 1140189592Sbms * If any group query is already pending, purge any recorded 1141189592Sbms * source-list state if it exists, and schedule a query response 1142189592Sbms * for this group-specific query. 1143189592Sbms */ 1144189592Sbms if (nsrc == 0) { 1145189592Sbms if (inm->inm_state == IGMP_G_QUERY_PENDING_MEMBER || 1146189592Sbms inm->inm_state == IGMP_SG_QUERY_PENDING_MEMBER) { 1147189592Sbms inm_clear_recorded(inm); 1148189592Sbms timer = min(inm->inm_timer, timer); 1149189592Sbms } 1150189592Sbms inm->inm_state = IGMP_G_QUERY_PENDING_MEMBER; 1151189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY(timer); 1152189592Sbms V_current_state_timers_running = 1; 1153189592Sbms return (retval); 1154189592Sbms } 1155189592Sbms 1156189592Sbms /* 1157189592Sbms * Deal with the case where a group-and-source-specific query has 1158189592Sbms * been received but a group-specific query is already pending. 1159189592Sbms */ 1160189592Sbms if (inm->inm_state == IGMP_G_QUERY_PENDING_MEMBER) { 1161189592Sbms timer = min(inm->inm_timer, timer); 1162189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY(timer); 1163189592Sbms V_current_state_timers_running = 1; 1164189592Sbms return (retval); 1165189592Sbms } 1166189592Sbms 1167189592Sbms /* 1168189592Sbms * Finally, deal with the case where a group-and-source-specific 1169189592Sbms * query has been received, where a response to a previous g-s-r 1170189592Sbms * query exists, or none exists. 1171189592Sbms * In this case, we need to parse the source-list which the Querier 1172189592Sbms * has provided us with and check if we have any source list filter 1173189592Sbms * entries at T1 for these sources. If we do not, there is no need 1174189592Sbms * schedule a report and the query may be dropped. 1175189592Sbms * If we do, we must record them and schedule a current-state 1176189592Sbms * report for those sources. 1177189592Sbms * FIXME: Handling source lists larger than 1 mbuf requires that 1178189592Sbms * we pass the mbuf chain pointer down to this function, and use 1179189592Sbms * m_getptr() to walk the chain. 1180189592Sbms */ 1181189592Sbms if (inm->inm_nsrc > 0) { 1182189592Sbms const struct in_addr *ap; 1183189592Sbms int i, nrecorded; 1184189592Sbms 1185189592Sbms ap = (const struct in_addr *)(igmpv3 + 1); 1186189592Sbms nrecorded = 0; 1187189592Sbms for (i = 0; i < nsrc; i++, ap++) { 1188189592Sbms retval = inm_record_source(inm, ap->s_addr); 1189189592Sbms if (retval < 0) 1190189592Sbms break; 1191189592Sbms nrecorded += retval; 1192189592Sbms } 1193189592Sbms if (nrecorded > 0) { 1194189592Sbms CTR1(KTR_IGMPV3, 1195189592Sbms "%s: schedule response to SG query", __func__); 1196189592Sbms inm->inm_state = IGMP_SG_QUERY_PENDING_MEMBER; 1197189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY(timer); 1198189592Sbms V_current_state_timers_running = 1; 1199189592Sbms } 1200189592Sbms } 1201189592Sbms 1202189592Sbms return (retval); 1203189592Sbms} 1204189592Sbms 1205189592Sbms/* 1206189592Sbms * Process a received IGMPv1 host membership report. 1207189592Sbms * 1208189592Sbms * NOTE: 0.0.0.0 workaround breaks const correctness. 1209189592Sbms */ 1210189592Sbmsstatic int 1211189592Sbmsigmp_input_v1_report(struct ifnet *ifp, /*const*/ struct ip *ip, 1212189592Sbms /*const*/ struct igmp *igmp) 1213189592Sbms{ 1214189592Sbms struct in_ifaddr *ia; 1215189592Sbms struct in_multi *inm; 1216189592Sbms 1217190965Srwatson IGMPSTAT_INC(igps_rcv_reports); 1218189592Sbms 1219189592Sbms if (ifp->if_flags & IFF_LOOPBACK) 1220189592Sbms return (0); 1221189592Sbms 1222189592Sbms if (!IN_MULTICAST(ntohl(igmp->igmp_group.s_addr) || 1223189592Sbms !in_hosteq(igmp->igmp_group, ip->ip_dst))) { 1224190965Srwatson IGMPSTAT_INC(igps_rcv_badreports); 1225189592Sbms return (EINVAL); 1226189592Sbms } 1227189592Sbms 1228189592Sbms /* 1229189592Sbms * RFC 3376, Section 4.2.13, 9.2, 9.3: 1230189592Sbms * Booting clients may use the source address 0.0.0.0. Some 1231189592Sbms * IGMP daemons may not know how to use IP_RECVIF to determine 1232189592Sbms * the interface upon which this message was received. 1233189592Sbms * Replace 0.0.0.0 with the subnet address if told to do so. 1234189592Sbms */ 1235189592Sbms if (V_igmp_recvifkludge && in_nullhost(ip->ip_src)) { 1236189592Sbms IFP_TO_IA(ifp, ia); 1237194760Srwatson if (ia != NULL) { 1238189592Sbms ip->ip_src.s_addr = htonl(ia->ia_subnet); 1239194760Srwatson ifa_free(&ia->ia_ifa); 1240194760Srwatson } 1241189592Sbms } 1242189592Sbms 1243189592Sbms CTR3(KTR_IGMPV3, "process v1 report %s on ifp %p(%s)", 1244189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 1245189592Sbms 1246189592Sbms /* 1247189592Sbms * IGMPv1 report suppression. 1248189592Sbms * If we are a member of this group, and our membership should be 1249189592Sbms * reported, stop our group timer and transition to the 'lazy' state. 1250189592Sbms */ 1251189592Sbms IN_MULTI_LOCK(); 1252189592Sbms inm = inm_lookup(ifp, igmp->igmp_group); 1253189592Sbms if (inm != NULL) { 1254189592Sbms struct igmp_ifinfo *igi; 1255189592Sbms 1256189592Sbms igi = inm->inm_igi; 1257189592Sbms if (igi == NULL) { 1258189592Sbms KASSERT(igi != NULL, 1259189592Sbms ("%s: no igi for ifp %p", __func__, ifp)); 1260189592Sbms goto out_locked; 1261189592Sbms } 1262189592Sbms 1263190965Srwatson IGMPSTAT_INC(igps_rcv_ourreports); 1264189592Sbms 1265189592Sbms /* 1266189592Sbms * If we are in IGMPv3 host mode, do not allow the 1267189592Sbms * other host's IGMPv1 report to suppress our reports 1268189592Sbms * unless explicitly configured to do so. 1269189592Sbms */ 1270189592Sbms if (igi->igi_version == IGMP_VERSION_3) { 1271189592Sbms if (V_igmp_legacysupp) 1272189592Sbms igmp_v3_suppress_group_record(inm); 1273189592Sbms goto out_locked; 1274189592Sbms } 1275189592Sbms 1276189592Sbms inm->inm_timer = 0; 1277189592Sbms 1278189592Sbms switch (inm->inm_state) { 1279189592Sbms case IGMP_NOT_MEMBER: 1280189592Sbms case IGMP_SILENT_MEMBER: 1281189592Sbms break; 1282189592Sbms case IGMP_IDLE_MEMBER: 1283189592Sbms case IGMP_LAZY_MEMBER: 1284189592Sbms case IGMP_AWAKENING_MEMBER: 1285189592Sbms CTR3(KTR_IGMPV3, 1286189592Sbms "report suppressed for %s on ifp %p(%s)", 1287189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 1288189592Sbms case IGMP_SLEEPING_MEMBER: 1289189592Sbms inm->inm_state = IGMP_SLEEPING_MEMBER; 1290189592Sbms break; 1291189592Sbms case IGMP_REPORTING_MEMBER: 1292189592Sbms CTR3(KTR_IGMPV3, 1293189592Sbms "report suppressed for %s on ifp %p(%s)", 1294189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 1295189592Sbms if (igi->igi_version == IGMP_VERSION_1) 1296189592Sbms inm->inm_state = IGMP_LAZY_MEMBER; 1297189592Sbms else if (igi->igi_version == IGMP_VERSION_2) 1298189592Sbms inm->inm_state = IGMP_SLEEPING_MEMBER; 1299189592Sbms break; 1300189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 1301189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 1302189592Sbms case IGMP_LEAVING_MEMBER: 1303189592Sbms break; 1304189592Sbms } 1305189592Sbms } 1306189592Sbms 1307189592Sbmsout_locked: 1308189592Sbms IN_MULTI_UNLOCK(); 1309189592Sbms 1310189592Sbms return (0); 1311189592Sbms} 1312189592Sbms 1313189592Sbms/* 1314189592Sbms * Process a received IGMPv2 host membership report. 1315189592Sbms * 1316189592Sbms * NOTE: 0.0.0.0 workaround breaks const correctness. 1317189592Sbms */ 1318189592Sbmsstatic int 1319189592Sbmsigmp_input_v2_report(struct ifnet *ifp, /*const*/ struct ip *ip, 1320189592Sbms /*const*/ struct igmp *igmp) 1321189592Sbms{ 1322189592Sbms struct in_ifaddr *ia; 1323189592Sbms struct in_multi *inm; 1324189592Sbms 1325189592Sbms /* 1326189592Sbms * Make sure we don't hear our own membership report. Fast 1327189592Sbms * leave requires knowing that we are the only member of a 1328189592Sbms * group. 1329189592Sbms */ 1330189592Sbms IFP_TO_IA(ifp, ia); 1331194760Srwatson if (ia != NULL && in_hosteq(ip->ip_src, IA_SIN(ia)->sin_addr)) { 1332194760Srwatson ifa_free(&ia->ia_ifa); 1333189592Sbms return (0); 1334194760Srwatson } 1335189592Sbms 1336190965Srwatson IGMPSTAT_INC(igps_rcv_reports); 1337189592Sbms 1338194760Srwatson if (ifp->if_flags & IFF_LOOPBACK) { 1339194760Srwatson if (ia != NULL) 1340194760Srwatson ifa_free(&ia->ia_ifa); 1341189592Sbms return (0); 1342194760Srwatson } 1343189592Sbms 1344189592Sbms if (!IN_MULTICAST(ntohl(igmp->igmp_group.s_addr)) || 1345189592Sbms !in_hosteq(igmp->igmp_group, ip->ip_dst)) { 1346194760Srwatson if (ia != NULL) 1347194760Srwatson ifa_free(&ia->ia_ifa); 1348190965Srwatson IGMPSTAT_INC(igps_rcv_badreports); 1349189592Sbms return (EINVAL); 1350189592Sbms } 1351189592Sbms 1352189592Sbms /* 1353189592Sbms * RFC 3376, Section 4.2.13, 9.2, 9.3: 1354189592Sbms * Booting clients may use the source address 0.0.0.0. Some 1355189592Sbms * IGMP daemons may not know how to use IP_RECVIF to determine 1356189592Sbms * the interface upon which this message was received. 1357189592Sbms * Replace 0.0.0.0 with the subnet address if told to do so. 1358189592Sbms */ 1359189592Sbms if (V_igmp_recvifkludge && in_nullhost(ip->ip_src)) { 1360189592Sbms if (ia != NULL) 1361189592Sbms ip->ip_src.s_addr = htonl(ia->ia_subnet); 1362189592Sbms } 1363194760Srwatson if (ia != NULL) 1364194760Srwatson ifa_free(&ia->ia_ifa); 1365189592Sbms 1366189592Sbms CTR3(KTR_IGMPV3, "process v2 report %s on ifp %p(%s)", 1367189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 1368189592Sbms 1369189592Sbms /* 1370189592Sbms * IGMPv2 report suppression. 1371189592Sbms * If we are a member of this group, and our membership should be 1372189592Sbms * reported, and our group timer is pending or about to be reset, 1373189592Sbms * stop our group timer by transitioning to the 'lazy' state. 1374189592Sbms */ 1375189592Sbms IN_MULTI_LOCK(); 1376189592Sbms inm = inm_lookup(ifp, igmp->igmp_group); 1377189592Sbms if (inm != NULL) { 1378189592Sbms struct igmp_ifinfo *igi; 1379189592Sbms 1380189592Sbms igi = inm->inm_igi; 1381189592Sbms KASSERT(igi != NULL, ("%s: no igi for ifp %p", __func__, ifp)); 1382189592Sbms 1383190965Srwatson IGMPSTAT_INC(igps_rcv_ourreports); 1384189592Sbms 1385189592Sbms /* 1386189592Sbms * If we are in IGMPv3 host mode, do not allow the 1387189592Sbms * other host's IGMPv1 report to suppress our reports 1388189592Sbms * unless explicitly configured to do so. 1389189592Sbms */ 1390189592Sbms if (igi->igi_version == IGMP_VERSION_3) { 1391189592Sbms if (V_igmp_legacysupp) 1392189592Sbms igmp_v3_suppress_group_record(inm); 1393189592Sbms goto out_locked; 1394189592Sbms } 1395189592Sbms 1396189592Sbms inm->inm_timer = 0; 1397189592Sbms 1398189592Sbms switch (inm->inm_state) { 1399189592Sbms case IGMP_NOT_MEMBER: 1400189592Sbms case IGMP_SILENT_MEMBER: 1401189592Sbms case IGMP_SLEEPING_MEMBER: 1402189592Sbms break; 1403189592Sbms case IGMP_REPORTING_MEMBER: 1404189592Sbms case IGMP_IDLE_MEMBER: 1405189592Sbms case IGMP_AWAKENING_MEMBER: 1406189592Sbms CTR3(KTR_IGMPV3, 1407189592Sbms "report suppressed for %s on ifp %p(%s)", 1408189592Sbms inet_ntoa(igmp->igmp_group), ifp, ifp->if_xname); 1409189592Sbms case IGMP_LAZY_MEMBER: 1410189592Sbms inm->inm_state = IGMP_LAZY_MEMBER; 1411189592Sbms break; 1412189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 1413189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 1414189592Sbms case IGMP_LEAVING_MEMBER: 1415189592Sbms break; 1416189592Sbms } 1417189592Sbms } 1418189592Sbms 1419189592Sbmsout_locked: 1420189592Sbms IN_MULTI_UNLOCK(); 1421189592Sbms 1422189592Sbms return (0); 1423189592Sbms} 1424189592Sbms 14251541Srgrimesvoid 1426189592Sbmsigmp_input(struct mbuf *m, int off) 14271541Srgrimes{ 1428189592Sbms int iphlen; 1429189592Sbms struct ifnet *ifp; 1430189592Sbms struct igmp *igmp; 1431189592Sbms struct ip *ip; 1432189592Sbms int igmplen; 1433189592Sbms int minlen; 1434189592Sbms int queryver; 1435189592Sbms 1436189592Sbms CTR3(KTR_IGMPV3, "%s: called w/mbuf (%p,%d)", __func__, m, off); 1437189592Sbms 1438189592Sbms ifp = m->m_pkthdr.rcvif; 14391541Srgrimes 1440190965Srwatson IGMPSTAT_INC(igps_rcv_total); 14411541Srgrimes 14421541Srgrimes ip = mtod(m, struct ip *); 1443189592Sbms iphlen = off; 14441541Srgrimes igmplen = ip->ip_len; 14451541Srgrimes 14461541Srgrimes /* 1447164863Srwatson * Validate lengths. 14481541Srgrimes */ 14491541Srgrimes if (igmplen < IGMP_MINLEN) { 1450190965Srwatson IGMPSTAT_INC(igps_rcv_tooshort); 14511541Srgrimes m_freem(m); 14521541Srgrimes return; 14531541Srgrimes } 1454189592Sbms 1455189592Sbms /* 1456189592Sbms * Always pullup to the minimum size for v1/v2 or v3 1457189592Sbms * to amortize calls to m_pullup(). 1458189592Sbms */ 1459189592Sbms minlen = iphlen; 1460189592Sbms if (igmplen >= IGMP_V3_QUERY_MINLEN) 1461189592Sbms minlen += IGMP_V3_QUERY_MINLEN; 1462189592Sbms else 1463189592Sbms minlen += IGMP_MINLEN; 14641541Srgrimes if ((m->m_flags & M_EXT || m->m_len < minlen) && 14651541Srgrimes (m = m_pullup(m, minlen)) == 0) { 1466190965Srwatson IGMPSTAT_INC(igps_rcv_tooshort); 14671541Srgrimes return; 14681541Srgrimes } 1469189592Sbms ip = mtod(m, struct ip *); 14701541Srgrimes 14711541Srgrimes /* 1472164863Srwatson * Validate checksum. 14731541Srgrimes */ 14741541Srgrimes m->m_data += iphlen; 14751541Srgrimes m->m_len -= iphlen; 14761541Srgrimes igmp = mtod(m, struct igmp *); 14771541Srgrimes if (in_cksum(m, igmplen)) { 1478190965Srwatson IGMPSTAT_INC(igps_rcv_badsum); 14791541Srgrimes m_freem(m); 14801541Srgrimes return; 14811541Srgrimes } 14821541Srgrimes m->m_data -= iphlen; 14831541Srgrimes m->m_len += iphlen; 14842531Swollman 1485207275Sbms /* 1486207275Sbms * IGMP control traffic is link-scope, and must have a TTL of 1. 1487207275Sbms * DVMRP traffic (e.g. mrinfo, mtrace) is an exception; 1488207275Sbms * probe packets may come from beyond the LAN. 1489207275Sbms */ 1490207275Sbms if (igmp->igmp_type != IGMP_DVMRP && ip->ip_ttl != 1) { 1491207275Sbms IGMPSTAT_INC(igps_rcv_badttl); 1492207275Sbms m_freem(m); 1493207275Sbms return; 1494207275Sbms } 1495207275Sbms 14961541Srgrimes switch (igmp->igmp_type) { 1497189592Sbms case IGMP_HOST_MEMBERSHIP_QUERY: 1498189592Sbms if (igmplen == IGMP_MINLEN) { 1499189592Sbms if (igmp->igmp_code == 0) 1500189592Sbms queryver = IGMP_VERSION_1; 1501189592Sbms else 1502189592Sbms queryver = IGMP_VERSION_2; 1503189592Sbms } else if (igmplen >= IGMP_V3_QUERY_MINLEN) { 1504189592Sbms queryver = IGMP_VERSION_3; 1505189592Sbms } else { 1506190965Srwatson IGMPSTAT_INC(igps_rcv_tooshort); 1507189592Sbms m_freem(m); 1508189592Sbms return; 1509189592Sbms } 15101541Srgrimes 1511189592Sbms switch (queryver) { 1512189592Sbms case IGMP_VERSION_1: 1513190965Srwatson IGMPSTAT_INC(igps_rcv_v1v2_queries); 1514189592Sbms if (!V_igmp_v1enable) 1515189592Sbms break; 1516193231Sbms if (igmp_input_v1_query(ifp, ip, igmp) != 0) { 1517144163Ssam m_freem(m); 1518144163Ssam return; 1519144163Ssam } 1520189592Sbms break; 15214028Spst 1522189592Sbms case IGMP_VERSION_2: 1523190965Srwatson IGMPSTAT_INC(igps_rcv_v1v2_queries); 1524189592Sbms if (!V_igmp_v2enable) 1525189592Sbms break; 1526189592Sbms if (igmp_input_v2_query(ifp, ip, igmp) != 0) { 15272531Swollman m_freem(m); 15282531Swollman return; 15292531Swollman } 1530189592Sbms break; 15312531Swollman 1532189592Sbms case IGMP_VERSION_3: { 1533189592Sbms struct igmpv3 *igmpv3; 1534189592Sbms uint16_t igmpv3len; 1535189592Sbms uint16_t srclen; 1536189592Sbms int nsrc; 1537189592Sbms 1538190965Srwatson IGMPSTAT_INC(igps_rcv_v3_queries); 1539189592Sbms igmpv3 = (struct igmpv3 *)igmp; 1540189592Sbms /* 1541189592Sbms * Validate length based on source count. 1542189592Sbms */ 1543189592Sbms nsrc = ntohs(igmpv3->igmp_numsrc); 1544189592Sbms srclen = sizeof(struct in_addr) * nsrc; 1545189592Sbms if (nsrc * sizeof(in_addr_t) > srclen) { 1546190965Srwatson IGMPSTAT_INC(igps_rcv_tooshort); 1547189592Sbms return; 15482531Swollman } 1549189592Sbms /* 1550189592Sbms * m_pullup() may modify m, so pullup in 1551189592Sbms * this scope. 1552189592Sbms */ 1553189592Sbms igmpv3len = iphlen + IGMP_V3_QUERY_MINLEN + 1554189592Sbms srclen; 1555189592Sbms if ((m->m_flags & M_EXT || 1556189592Sbms m->m_len < igmpv3len) && 1557189592Sbms (m = m_pullup(m, igmpv3len)) == NULL) { 1558190965Srwatson IGMPSTAT_INC(igps_rcv_tooshort); 1559189592Sbms return; 1560189592Sbms } 1561189592Sbms igmpv3 = (struct igmpv3 *)(mtod(m, uint8_t *) 1562189592Sbms + iphlen); 1563189592Sbms if (igmp_input_v3_query(ifp, ip, igmpv3) != 0) { 1564189592Sbms m_freem(m); 1565189592Sbms return; 1566189592Sbms } 15671541Srgrimes } 1568189592Sbms break; 15691541Srgrimes } 15701541Srgrimes break; 15711541Srgrimes 1572189592Sbms case IGMP_v1_HOST_MEMBERSHIP_REPORT: 1573189592Sbms if (!V_igmp_v1enable) 157414622Sfenner break; 1575189592Sbms if (igmp_input_v1_report(ifp, ip, igmp) != 0) { 1576189592Sbms m_freem(m); 1577189592Sbms return; 1578189592Sbms } 1579189592Sbms break; 158014622Sfenner 1581189592Sbms case IGMP_v2_HOST_MEMBERSHIP_REPORT: 1582189592Sbms if (!V_igmp_v2enable) 15831541Srgrimes break; 1584189592Sbms if (!ip_checkrouteralert(m)) 1585190965Srwatson IGMPSTAT_INC(igps_rcv_nora); 1586189592Sbms if (igmp_input_v2_report(ifp, ip, igmp) != 0) { 15871541Srgrimes m_freem(m); 15881541Srgrimes return; 15891541Srgrimes } 1590189592Sbms break; 15911541Srgrimes 1592189592Sbms case IGMP_v3_HOST_MEMBERSHIP_REPORT: 15931541Srgrimes /* 1594189592Sbms * Hosts do not need to process IGMPv3 membership reports, 1595189592Sbms * as report suppression is no longer required. 15961541Srgrimes */ 1597189592Sbms if (!ip_checkrouteralert(m)) 1598190965Srwatson IGMPSTAT_INC(igps_rcv_nora); 1599189592Sbms break; 16001541Srgrimes 1601189592Sbms default: 16021541Srgrimes break; 16031541Srgrimes } 16041541Srgrimes 16051541Srgrimes /* 1606164863Srwatson * Pass all valid IGMP packets up to any process(es) listening on a 1607164863Srwatson * raw IGMP socket. 16081541Srgrimes */ 160982890Sjulian rip_input(m, off); 16101541Srgrimes} 16111541Srgrimes 1612189592Sbms 1613189592Sbms/* 1614189592Sbms * Fast timeout handler (global). 1615189592Sbms * VIMAGE: Timeout handlers are expected to service all vimages. 1616189592Sbms */ 16171541Srgrimesvoid 1618189592Sbmsigmp_fasttimo(void) 16191541Srgrimes{ 1620189592Sbms VNET_ITERATOR_DECL(vnet_iter); 16211541Srgrimes 1622195760Srwatson VNET_LIST_RLOCK_NOSLEEP(); 1623189592Sbms VNET_FOREACH(vnet_iter) { 1624189592Sbms CURVNET_SET(vnet_iter); 1625189592Sbms igmp_fasttimo_vnet(); 1626189592Sbms CURVNET_RESTORE(); 1627189592Sbms } 1628195760Srwatson VNET_LIST_RUNLOCK_NOSLEEP(); 1629189592Sbms} 1630189592Sbms 1631189592Sbms/* 1632189592Sbms * Fast timeout handler (per-vnet). 1633189592Sbms * Sends are shuffled off to a netisr to deal with Giant. 1634189592Sbms * 1635189592Sbms * VIMAGE: Assume caller has set up our curvnet. 1636189592Sbms */ 1637189592Sbmsstatic void 1638189592Sbmsigmp_fasttimo_vnet(void) 1639189592Sbms{ 1640189592Sbms struct ifqueue scq; /* State-change packets */ 1641189592Sbms struct ifqueue qrq; /* Query response packets */ 1642189592Sbms struct ifnet *ifp; 1643189592Sbms struct igmp_ifinfo *igi; 1644189592Sbms struct ifmultiaddr *ifma, *tifma; 1645189592Sbms struct in_multi *inm; 1646189592Sbms int loop, uri_fasthz; 1647189592Sbms 1648189592Sbms loop = 0; 1649189592Sbms uri_fasthz = 0; 1650189592Sbms 1651189592Sbms /* 1652189592Sbms * Quick check to see if any work needs to be done, in order to 1653189592Sbms * minimize the overhead of fasttimo processing. 1654189592Sbms * SMPng: XXX Unlocked reads. 1655189592Sbms */ 1656189592Sbms if (!V_current_state_timers_running && 1657189592Sbms !V_interface_timers_running && 1658189592Sbms !V_state_change_timers_running) 1659189592Sbms return; 1660189592Sbms 1661189592Sbms IN_MULTI_LOCK(); 1662189592Sbms IGMP_LOCK(); 1663189592Sbms 1664189592Sbms /* 1665189592Sbms * IGMPv3 General Query response timer processing. 1666189592Sbms */ 1667189592Sbms if (V_interface_timers_running) { 1668189592Sbms CTR1(KTR_IGMPV3, "%s: interface timers running", __func__); 1669189592Sbms 1670189592Sbms V_interface_timers_running = 0; 1671189592Sbms LIST_FOREACH(igi, &V_igi_head, igi_link) { 1672189592Sbms if (igi->igi_v3_timer == 0) { 1673189592Sbms /* Do nothing. */ 1674189592Sbms } else if (--igi->igi_v3_timer == 0) { 1675189592Sbms igmp_v3_dispatch_general_query(igi); 1676189592Sbms } else { 1677189592Sbms V_interface_timers_running = 1; 1678189592Sbms } 1679189592Sbms } 1680189592Sbms } 1681189592Sbms 1682189592Sbms if (!V_current_state_timers_running && 1683189592Sbms !V_state_change_timers_running) 1684189592Sbms goto out_locked; 1685189592Sbms 1686189592Sbms V_current_state_timers_running = 0; 1687189592Sbms V_state_change_timers_running = 0; 1688189592Sbms 1689189592Sbms CTR1(KTR_IGMPV3, "%s: state change timers running", __func__); 1690189592Sbms 1691189592Sbms /* 1692189592Sbms * IGMPv1/v2/v3 host report and state-change timer processing. 1693189592Sbms * Note: Processing a v3 group timer may remove a node. 1694189592Sbms */ 1695189592Sbms LIST_FOREACH(igi, &V_igi_head, igi_link) { 1696189592Sbms ifp = igi->igi_ifp; 1697189592Sbms 1698189592Sbms if (igi->igi_version == IGMP_VERSION_3) { 1699189592Sbms loop = (igi->igi_flags & IGIF_LOOPBACK) ? 1 : 0; 1700189592Sbms uri_fasthz = IGMP_RANDOM_DELAY(igi->igi_uri * 1701189592Sbms PR_FASTHZ); 1702189592Sbms 1703189592Sbms memset(&qrq, 0, sizeof(struct ifqueue)); 1704189592Sbms IFQ_SET_MAXLEN(&qrq, IGMP_MAX_G_GS_PACKETS); 1705189592Sbms 1706189592Sbms memset(&scq, 0, sizeof(struct ifqueue)); 1707189592Sbms IFQ_SET_MAXLEN(&scq, IGMP_MAX_STATE_CHANGE_PACKETS); 1708189592Sbms } 1709189592Sbms 1710189592Sbms IF_ADDR_LOCK(ifp); 1711189592Sbms TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, 1712189592Sbms tifma) { 1713189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 1714189931Sbms ifma->ifma_protospec == NULL) 1715189592Sbms continue; 1716189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 1717189592Sbms switch (igi->igi_version) { 1718189592Sbms case IGMP_VERSION_1: 1719189592Sbms case IGMP_VERSION_2: 1720189592Sbms igmp_v1v2_process_group_timer(inm, 1721189592Sbms igi->igi_version); 1722189592Sbms break; 1723189592Sbms case IGMP_VERSION_3: 1724189592Sbms igmp_v3_process_group_timers(igi, &qrq, 1725189592Sbms &scq, inm, uri_fasthz); 1726189592Sbms break; 1727189592Sbms } 1728189592Sbms } 1729189592Sbms IF_ADDR_UNLOCK(ifp); 1730189592Sbms 1731189592Sbms if (igi->igi_version == IGMP_VERSION_3) { 1732189592Sbms struct in_multi *tinm; 1733189592Sbms 1734189592Sbms igmp_dispatch_queue(&qrq, 0, loop); 1735189592Sbms igmp_dispatch_queue(&scq, 0, loop); 1736189592Sbms 1737189592Sbms /* 1738189592Sbms * Free the in_multi reference(s) for this 1739189592Sbms * IGMP lifecycle. 1740189592Sbms */ 1741189592Sbms SLIST_FOREACH_SAFE(inm, &igi->igi_relinmhead, 1742189592Sbms inm_nrele, tinm) { 1743189592Sbms SLIST_REMOVE_HEAD(&igi->igi_relinmhead, 1744189592Sbms inm_nrele); 1745189592Sbms inm_release_locked(inm); 1746189592Sbms } 1747189592Sbms } 1748189592Sbms } 1749189592Sbms 1750189592Sbmsout_locked: 1751189592Sbms IGMP_UNLOCK(); 1752189592Sbms IN_MULTI_UNLOCK(); 1753189592Sbms} 1754189592Sbms 1755189592Sbms/* 1756189592Sbms * Update host report group timer for IGMPv1/v2. 1757189592Sbms * Will update the global pending timer flags. 1758189592Sbms */ 1759189592Sbmsstatic void 1760189592Sbmsigmp_v1v2_process_group_timer(struct in_multi *inm, const int version) 1761189592Sbms{ 1762189592Sbms int report_timer_expired; 1763189592Sbms 1764148682Srwatson IN_MULTI_LOCK_ASSERT(); 1765189592Sbms IGMP_LOCK_ASSERT(); 1766148682Srwatson 1767189592Sbms if (inm->inm_timer == 0) { 1768189592Sbms report_timer_expired = 0; 1769189592Sbms } else if (--inm->inm_timer == 0) { 1770189592Sbms report_timer_expired = 1; 177114622Sfenner } else { 1772189592Sbms V_current_state_timers_running = 1; 1773189592Sbms return; 1774189592Sbms } 1775189592Sbms 1776189592Sbms switch (inm->inm_state) { 1777189592Sbms case IGMP_NOT_MEMBER: 1778189592Sbms case IGMP_SILENT_MEMBER: 1779189592Sbms case IGMP_IDLE_MEMBER: 1780189592Sbms case IGMP_LAZY_MEMBER: 1781189592Sbms case IGMP_SLEEPING_MEMBER: 1782189592Sbms case IGMP_AWAKENING_MEMBER: 1783189592Sbms break; 1784189592Sbms case IGMP_REPORTING_MEMBER: 1785189592Sbms if (report_timer_expired) { 1786189592Sbms inm->inm_state = IGMP_IDLE_MEMBER; 1787189592Sbms (void)igmp_v1v2_queue_report(inm, 1788189592Sbms (version == IGMP_VERSION_2) ? 1789189592Sbms IGMP_v2_HOST_MEMBERSHIP_REPORT : 1790189592Sbms IGMP_v1_HOST_MEMBERSHIP_REPORT); 1791144163Ssam } 1792189592Sbms break; 1793189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 1794189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 1795189592Sbms case IGMP_LEAVING_MEMBER: 1796189592Sbms break; 17971541Srgrimes } 17981541Srgrimes} 17991541Srgrimes 1800189592Sbms/* 1801189592Sbms * Update a group's timers for IGMPv3. 1802189592Sbms * Will update the global pending timer flags. 1803189592Sbms * Note: Unlocked read from igi. 1804189592Sbms */ 1805189592Sbmsstatic void 1806189592Sbmsigmp_v3_process_group_timers(struct igmp_ifinfo *igi, 1807189592Sbms struct ifqueue *qrq, struct ifqueue *scq, 1808189592Sbms struct in_multi *inm, const int uri_fasthz) 18091541Srgrimes{ 1810189592Sbms int query_response_timer_expired; 1811189592Sbms int state_change_retransmit_timer_expired; 1812119181Srwatson 1813148682Srwatson IN_MULTI_LOCK_ASSERT(); 1814189592Sbms IGMP_LOCK_ASSERT(); 1815148682Srwatson 1816189592Sbms query_response_timer_expired = 0; 1817189592Sbms state_change_retransmit_timer_expired = 0; 1818189592Sbms 1819189592Sbms /* 1820189592Sbms * During a transition from v1/v2 compatibility mode back to v3, 1821189592Sbms * a group record in REPORTING state may still have its group 1822189592Sbms * timer active. This is a no-op in this function; it is easier 1823189592Sbms * to deal with it here than to complicate the slow-timeout path. 1824189592Sbms */ 1825189592Sbms if (inm->inm_timer == 0) { 1826189592Sbms query_response_timer_expired = 0; 1827189592Sbms } else if (--inm->inm_timer == 0) { 1828189592Sbms query_response_timer_expired = 1; 1829189592Sbms } else { 1830189592Sbms V_current_state_timers_running = 1; 1831189592Sbms } 1832189592Sbms 1833189592Sbms if (inm->inm_sctimer == 0) { 1834189592Sbms state_change_retransmit_timer_expired = 0; 1835189592Sbms } else if (--inm->inm_sctimer == 0) { 1836189592Sbms state_change_retransmit_timer_expired = 1; 1837189592Sbms } else { 1838189592Sbms V_state_change_timers_running = 1; 1839189592Sbms } 1840189592Sbms 1841189592Sbms /* We are in fasttimo, so be quick about it. */ 1842189592Sbms if (!state_change_retransmit_timer_expired && 1843189592Sbms !query_response_timer_expired) 1844189592Sbms return; 1845189592Sbms 1846189592Sbms switch (inm->inm_state) { 1847189592Sbms case IGMP_NOT_MEMBER: 1848189592Sbms case IGMP_SILENT_MEMBER: 1849189592Sbms case IGMP_SLEEPING_MEMBER: 1850189592Sbms case IGMP_LAZY_MEMBER: 1851189592Sbms case IGMP_AWAKENING_MEMBER: 1852189592Sbms case IGMP_IDLE_MEMBER: 1853189592Sbms break; 1854189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 1855189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 1856189592Sbms /* 1857189592Sbms * Respond to a previously pending Group-Specific 1858189592Sbms * or Group-and-Source-Specific query by enqueueing 1859189592Sbms * the appropriate Current-State report for 1860189592Sbms * immediate transmission. 1861189592Sbms */ 1862189592Sbms if (query_response_timer_expired) { 1863189592Sbms int retval; 1864189592Sbms 1865189592Sbms retval = igmp_v3_enqueue_group_record(qrq, inm, 0, 1, 1866189592Sbms (inm->inm_state == IGMP_SG_QUERY_PENDING_MEMBER)); 1867189592Sbms CTR2(KTR_IGMPV3, "%s: enqueue record = %d", 1868189592Sbms __func__, retval); 1869189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 1870189592Sbms /* XXX Clear recorded sources for next time. */ 1871189592Sbms inm_clear_recorded(inm); 1872189592Sbms } 1873189592Sbms /* FALLTHROUGH */ 1874189592Sbms case IGMP_REPORTING_MEMBER: 1875189592Sbms case IGMP_LEAVING_MEMBER: 1876189592Sbms if (state_change_retransmit_timer_expired) { 1877189592Sbms /* 1878189592Sbms * State-change retransmission timer fired. 1879189592Sbms * If there are any further pending retransmissions, 1880189592Sbms * set the global pending state-change flag, and 1881189592Sbms * reset the timer. 1882189592Sbms */ 1883189592Sbms if (--inm->inm_scrv > 0) { 1884189592Sbms inm->inm_sctimer = uri_fasthz; 1885189592Sbms V_state_change_timers_running = 1; 1886189592Sbms } 1887189592Sbms /* 1888189592Sbms * Retransmit the previously computed state-change 1889189592Sbms * report. If there are no further pending 1890189592Sbms * retransmissions, the mbuf queue will be consumed. 1891189592Sbms * Update T0 state to T1 as we have now sent 1892189592Sbms * a state-change. 1893189592Sbms */ 1894189592Sbms (void)igmp_v3_merge_state_changes(inm, scq); 1895189592Sbms 1896189592Sbms inm_commit(inm); 1897189592Sbms CTR3(KTR_IGMPV3, "%s: T1 -> T0 for %s/%s", __func__, 1898189592Sbms inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname); 1899189592Sbms 1900189592Sbms /* 1901189592Sbms * If we are leaving the group for good, make sure 1902189592Sbms * we release IGMP's reference to it. 1903189592Sbms * This release must be deferred using a SLIST, 1904189592Sbms * as we are called from a loop which traverses 1905189592Sbms * the in_ifmultiaddr TAILQ. 1906189592Sbms */ 1907189592Sbms if (inm->inm_state == IGMP_LEAVING_MEMBER && 1908189592Sbms inm->inm_scrv == 0) { 1909189592Sbms inm->inm_state = IGMP_NOT_MEMBER; 1910189592Sbms SLIST_INSERT_HEAD(&igi->igi_relinmhead, 1911189592Sbms inm, inm_nrele); 1912189592Sbms } 1913189592Sbms } 1914189592Sbms break; 1915189592Sbms } 19161541Srgrimes} 19171541Srgrimes 1918189592Sbms 1919189592Sbms/* 1920189592Sbms * Suppress a group's pending response to a group or source/group query. 1921189592Sbms * 1922189592Sbms * Do NOT suppress state changes. This leads to IGMPv3 inconsistency. 1923189592Sbms * Do NOT update ST1/ST0 as this operation merely suppresses 1924189592Sbms * the currently pending group record. 1925189592Sbms * Do NOT suppress the response to a general query. It is possible but 1926189592Sbms * it would require adding another state or flag. 1927189592Sbms */ 1928189592Sbmsstatic void 1929189592Sbmsigmp_v3_suppress_group_record(struct in_multi *inm) 19301541Srgrimes{ 19311541Srgrimes 1932189592Sbms IN_MULTI_LOCK_ASSERT(); 1933189592Sbms 1934189592Sbms KASSERT(inm->inm_igi->igi_version == IGMP_VERSION_3, 1935189592Sbms ("%s: not IGMPv3 mode on link", __func__)); 1936189592Sbms 1937189592Sbms if (inm->inm_state != IGMP_G_QUERY_PENDING_MEMBER || 1938189592Sbms inm->inm_state != IGMP_SG_QUERY_PENDING_MEMBER) 1939189592Sbms return; 1940189592Sbms 1941189592Sbms if (inm->inm_state == IGMP_SG_QUERY_PENDING_MEMBER) 1942189592Sbms inm_clear_recorded(inm); 1943189592Sbms 1944189592Sbms inm->inm_timer = 0; 1945189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 1946189592Sbms} 1947189592Sbms 1948189592Sbms/* 1949189592Sbms * Switch to a different IGMP version on the given interface, 1950189592Sbms * as per Section 7.2.1. 1951189592Sbms */ 1952189592Sbmsstatic void 1953189592Sbmsigmp_set_version(struct igmp_ifinfo *igi, const int version) 1954189592Sbms{ 1955193231Sbms int old_version_timer; 1956189592Sbms 1957189592Sbms IGMP_LOCK_ASSERT(); 1958189592Sbms 1959189592Sbms CTR4(KTR_IGMPV3, "%s: switching to v%d on ifp %p(%s)", __func__, 1960189592Sbms version, igi->igi_ifp, igi->igi_ifp->if_xname); 1961189592Sbms 1962189592Sbms if (version == IGMP_VERSION_1 || version == IGMP_VERSION_2) { 1963189592Sbms /* 1964189592Sbms * Compute the "Older Version Querier Present" timer as per 1965189592Sbms * Section 8.12. 1966189592Sbms */ 1967189592Sbms old_version_timer = igi->igi_rv * igi->igi_qi + igi->igi_qri; 1968189592Sbms old_version_timer *= PR_SLOWHZ; 1969189592Sbms 1970189592Sbms if (version == IGMP_VERSION_1) { 1971189592Sbms igi->igi_v1_timer = old_version_timer; 1972189592Sbms igi->igi_v2_timer = 0; 1973189592Sbms } else if (version == IGMP_VERSION_2) { 1974189592Sbms igi->igi_v1_timer = 0; 1975189592Sbms igi->igi_v2_timer = old_version_timer; 1976189592Sbms } 1977189592Sbms } 1978189592Sbms 1979189592Sbms if (igi->igi_v1_timer == 0 && igi->igi_v2_timer > 0) { 1980189592Sbms if (igi->igi_version != IGMP_VERSION_2) { 1981189592Sbms igi->igi_version = IGMP_VERSION_2; 1982189592Sbms igmp_v3_cancel_link_timers(igi); 1983189592Sbms } 1984189592Sbms } else if (igi->igi_v1_timer > 0) { 1985189592Sbms if (igi->igi_version != IGMP_VERSION_1) { 1986189592Sbms igi->igi_version = IGMP_VERSION_1; 1987189592Sbms igmp_v3_cancel_link_timers(igi); 1988189592Sbms } 1989189592Sbms } 1990189592Sbms} 1991189592Sbms 1992189592Sbms/* 1993189592Sbms * Cancel pending IGMPv3 timers for the given link and all groups 1994189592Sbms * joined on it; state-change, general-query, and group-query timers. 1995193231Sbms * 1996193231Sbms * Only ever called on a transition from v3 to Compatibility mode. Kill 1997193231Sbms * the timers stone dead (this may be expensive for large N groups), they 1998193231Sbms * will be restarted if Compatibility Mode deems that they must be due to 1999193231Sbms * query processing. 2000189592Sbms */ 2001189592Sbmsstatic void 2002189592Sbmsigmp_v3_cancel_link_timers(struct igmp_ifinfo *igi) 2003189592Sbms{ 2004189592Sbms struct ifmultiaddr *ifma; 2005189592Sbms struct ifnet *ifp; 2006189592Sbms struct in_multi *inm; 2007189592Sbms 2008189592Sbms CTR3(KTR_IGMPV3, "%s: cancel v3 timers on ifp %p(%s)", __func__, 2009189592Sbms igi->igi_ifp, igi->igi_ifp->if_xname); 2010189592Sbms 2011189592Sbms IN_MULTI_LOCK_ASSERT(); 2012189592Sbms IGMP_LOCK_ASSERT(); 2013189592Sbms 20141541Srgrimes /* 2015193231Sbms * Stop the v3 General Query Response on this link stone dead. 2016193231Sbms * If fasttimo is woken up due to V_interface_timers_running, 2017193231Sbms * the flag will be cleared if there are no pending link timers. 20181541Srgrimes */ 2019189592Sbms igi->igi_v3_timer = 0; 2020189592Sbms 2021193231Sbms /* 2022193231Sbms * Now clear the current-state and state-change report timers 2023193231Sbms * for all memberships scoped to this link. 2024193231Sbms */ 2025189592Sbms ifp = igi->igi_ifp; 2026189592Sbms IF_ADDR_LOCK(ifp); 2027189592Sbms TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2028193231Sbms if (ifma->ifma_addr->sa_family != AF_INET || 2029193231Sbms ifma->ifma_protospec == NULL) 2030189592Sbms continue; 2031189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 2032189592Sbms switch (inm->inm_state) { 2033189592Sbms case IGMP_NOT_MEMBER: 2034189592Sbms case IGMP_SILENT_MEMBER: 2035189592Sbms case IGMP_IDLE_MEMBER: 2036189592Sbms case IGMP_LAZY_MEMBER: 2037189592Sbms case IGMP_SLEEPING_MEMBER: 2038189592Sbms case IGMP_AWAKENING_MEMBER: 2039193231Sbms /* 2040193231Sbms * These states are either not relevant in v3 mode, 2041193231Sbms * or are unreported. Do nothing. 2042193231Sbms */ 2043189592Sbms break; 2044189592Sbms case IGMP_LEAVING_MEMBER: 2045189592Sbms /* 2046193231Sbms * If we are leaving the group and switching to 2047193231Sbms * compatibility mode, we need to release the final 2048193231Sbms * reference held for issuing the INCLUDE {}, and 2049193231Sbms * transition to REPORTING to ensure the host leave 2050193231Sbms * message is sent upstream to the old querier -- 2051193231Sbms * transition to NOT would lose the leave and race. 2052189592Sbms * 2053189592Sbms * SMPNG: Must drop and re-acquire IF_ADDR_LOCK 2054189592Sbms * around inm_release_locked(), as it is not 2055189592Sbms * a recursive mutex. 2056189592Sbms */ 2057189592Sbms IF_ADDR_UNLOCK(ifp); 2058189592Sbms inm_release_locked(inm); 2059189592Sbms IF_ADDR_LOCK(ifp); 2060189592Sbms /* FALLTHROUGH */ 2061189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 2062189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 2063189592Sbms inm_clear_recorded(inm); 2064189592Sbms /* FALLTHROUGH */ 2065189592Sbms case IGMP_REPORTING_MEMBER: 2066189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 2067189592Sbms break; 2068189592Sbms } 2069193231Sbms /* 2070193231Sbms * Always clear state-change and group report timers. 2071193231Sbms * Free any pending IGMPv3 state-change records. 2072193231Sbms */ 2073193231Sbms inm->inm_sctimer = 0; 2074193231Sbms inm->inm_timer = 0; 2075193231Sbms _IF_DRAIN(&inm->inm_scq); 2076189592Sbms } 2077189592Sbms IF_ADDR_UNLOCK(ifp); 2078189592Sbms} 2079189592Sbms 2080189592Sbms/* 2081189592Sbms * Update the Older Version Querier Present timers for a link. 2082189592Sbms * See Section 7.2.1 of RFC 3376. 2083189592Sbms */ 2084189592Sbmsstatic void 2085189592Sbmsigmp_v1v2_process_querier_timers(struct igmp_ifinfo *igi) 2086189592Sbms{ 2087189592Sbms 2088189592Sbms IGMP_LOCK_ASSERT(); 2089189592Sbms 2090189592Sbms if (igi->igi_v1_timer == 0 && igi->igi_v2_timer == 0) { 2091189592Sbms /* 2092189592Sbms * IGMPv1 and IGMPv2 Querier Present timers expired. 2093189592Sbms * 2094189592Sbms * Revert to IGMPv3. 2095189592Sbms */ 2096189592Sbms if (igi->igi_version != IGMP_VERSION_3) { 2097189592Sbms CTR5(KTR_IGMPV3, 2098189592Sbms "%s: transition from v%d -> v%d on %p(%s)", 2099189592Sbms __func__, igi->igi_version, IGMP_VERSION_3, 2100189592Sbms igi->igi_ifp, igi->igi_ifp->if_xname); 2101189592Sbms igi->igi_version = IGMP_VERSION_3; 2102189592Sbms } 2103189592Sbms } else if (igi->igi_v1_timer == 0 && igi->igi_v2_timer > 0) { 2104189592Sbms /* 2105189592Sbms * IGMPv1 Querier Present timer expired, 2106189592Sbms * IGMPv2 Querier Present timer running. 2107189592Sbms * If IGMPv2 was disabled since last timeout, 2108189592Sbms * revert to IGMPv3. 2109189592Sbms * If IGMPv2 is enabled, revert to IGMPv2. 2110189592Sbms */ 2111189592Sbms if (!V_igmp_v2enable) { 2112189592Sbms CTR5(KTR_IGMPV3, 2113189592Sbms "%s: transition from v%d -> v%d on %p(%s)", 2114189592Sbms __func__, igi->igi_version, IGMP_VERSION_3, 2115189592Sbms igi->igi_ifp, igi->igi_ifp->if_xname); 2116189592Sbms igi->igi_v2_timer = 0; 2117189592Sbms igi->igi_version = IGMP_VERSION_3; 2118189592Sbms } else { 2119189592Sbms --igi->igi_v2_timer; 2120189592Sbms if (igi->igi_version != IGMP_VERSION_2) { 2121189592Sbms CTR5(KTR_IGMPV3, 2122189592Sbms "%s: transition from v%d -> v%d on %p(%s)", 2123189592Sbms __func__, igi->igi_version, IGMP_VERSION_2, 2124189592Sbms igi->igi_ifp, igi->igi_ifp->if_xname); 2125189592Sbms igi->igi_version = IGMP_VERSION_2; 2126183550Szec } 21271541Srgrimes } 2128189592Sbms } else if (igi->igi_v1_timer > 0) { 2129189592Sbms /* 2130189592Sbms * IGMPv1 Querier Present timer running. 2131189592Sbms * Stop IGMPv2 timer if running. 2132189592Sbms * 2133189592Sbms * If IGMPv1 was disabled since last timeout, 2134189592Sbms * revert to IGMPv3. 2135189592Sbms * If IGMPv1 is enabled, reset IGMPv2 timer if running. 2136189592Sbms */ 2137189592Sbms if (!V_igmp_v1enable) { 2138189592Sbms CTR5(KTR_IGMPV3, 2139189592Sbms "%s: transition from v%d -> v%d on %p(%s)", 2140189592Sbms __func__, igi->igi_version, IGMP_VERSION_3, 2141189592Sbms igi->igi_ifp, igi->igi_ifp->if_xname); 2142189592Sbms igi->igi_v1_timer = 0; 2143189592Sbms igi->igi_version = IGMP_VERSION_3; 2144189592Sbms } else { 2145189592Sbms --igi->igi_v1_timer; 2146189592Sbms } 2147189592Sbms if (igi->igi_v2_timer > 0) { 2148189592Sbms CTR3(KTR_IGMPV3, 2149189592Sbms "%s: cancel v2 timer on %p(%s)", 2150189592Sbms __func__, igi->igi_ifp, igi->igi_ifp->if_xname); 2151189592Sbms igi->igi_v2_timer = 0; 2152189592Sbms } 21531541Srgrimes } 21541541Srgrimes} 21551541Srgrimes 2156189592Sbms/* 2157189592Sbms * Global slowtimo handler. 2158189592Sbms * VIMAGE: Timeout handlers are expected to service all vimages. 2159189592Sbms */ 21602531Swollmanvoid 2161119181Srwatsonigmp_slowtimo(void) 21622531Swollman{ 2163183550Szec VNET_ITERATOR_DECL(vnet_iter); 21642531Swollman 2165195760Srwatson VNET_LIST_RLOCK_NOSLEEP(); 2166183550Szec VNET_FOREACH(vnet_iter) { 2167183550Szec CURVNET_SET(vnet_iter); 2168189592Sbms igmp_slowtimo_vnet(); 2169183550Szec CURVNET_RESTORE(); 21702531Swollman } 2171195760Srwatson VNET_LIST_RUNLOCK_NOSLEEP(); 21722531Swollman} 21732531Swollman 2174189592Sbms/* 2175189592Sbms * Per-vnet slowtimo handler. 2176189592Sbms */ 21771541Srgrimesstatic void 2178189592Sbmsigmp_slowtimo_vnet(void) 21791541Srgrimes{ 2180189592Sbms struct igmp_ifinfo *igi; 21811541Srgrimes 2182189592Sbms IGMP_LOCK(); 2183189592Sbms 2184189592Sbms LIST_FOREACH(igi, &V_igi_head, igi_link) { 2185189592Sbms igmp_v1v2_process_querier_timers(igi); 2186189592Sbms } 2187189592Sbms 2188189592Sbms IGMP_UNLOCK(); 2189189592Sbms} 2190189592Sbms 2191189592Sbms/* 2192189592Sbms * Dispatch an IGMPv1/v2 host report or leave message. 2193189592Sbms * These are always small enough to fit inside a single mbuf. 2194189592Sbms */ 2195189592Sbmsstatic int 2196189592Sbmsigmp_v1v2_queue_report(struct in_multi *inm, const int type) 2197189592Sbms{ 2198189592Sbms struct ifnet *ifp; 2199189592Sbms struct igmp *igmp; 2200189592Sbms struct ip *ip; 2201189592Sbms struct mbuf *m; 2202189592Sbms 2203148682Srwatson IN_MULTI_LOCK_ASSERT(); 2204189592Sbms IGMP_LOCK_ASSERT(); 2205148682Srwatson 2206189592Sbms ifp = inm->inm_ifp; 2207189592Sbms 2208151967Sandre MGETHDR(m, M_DONTWAIT, MT_DATA); 2209119181Srwatson if (m == NULL) 2210189592Sbms return (ENOMEM); 2211189592Sbms MH_ALIGN(m, sizeof(struct ip) + sizeof(struct igmp)); 22122531Swollman 2213189592Sbms m->m_pkthdr.len = sizeof(struct ip) + sizeof(struct igmp); 2214189592Sbms 22152531Swollman m->m_data += sizeof(struct ip); 2216189592Sbms m->m_len = sizeof(struct igmp); 2217189592Sbms 2218119181Srwatson igmp = mtod(m, struct igmp *); 2219119181Srwatson igmp->igmp_type = type; 2220119181Srwatson igmp->igmp_code = 0; 2221119181Srwatson igmp->igmp_group = inm->inm_addr; 2222119181Srwatson igmp->igmp_cksum = 0; 2223189592Sbms igmp->igmp_cksum = in_cksum(m, sizeof(struct igmp)); 22241541Srgrimes 2225119181Srwatson m->m_data -= sizeof(struct ip); 2226119181Srwatson m->m_len += sizeof(struct ip); 2227189592Sbms 2228119181Srwatson ip = mtod(m, struct ip *); 2229119181Srwatson ip->ip_tos = 0; 2230189592Sbms ip->ip_len = sizeof(struct ip) + sizeof(struct igmp); 2231119181Srwatson ip->ip_off = 0; 2232119181Srwatson ip->ip_p = IPPROTO_IGMP; 2233119181Srwatson ip->ip_src.s_addr = INADDR_ANY; 22341541Srgrimes 2235189592Sbms if (type == IGMP_HOST_LEAVE_MESSAGE) 2236189592Sbms ip->ip_dst.s_addr = htonl(INADDR_ALLRTRS_GROUP); 2237189592Sbms else 2238189592Sbms ip->ip_dst = inm->inm_addr; 2239189592Sbms 2240189592Sbms igmp_save_context(m, ifp); 2241189592Sbms 2242189592Sbms m->m_flags |= M_IGMPV2; 2243189592Sbms if (inm->inm_igi->igi_flags & IGIF_LOOPBACK) 2244189592Sbms m->m_flags |= M_IGMP_LOOP; 2245189592Sbms 2246189592Sbms CTR2(KTR_IGMPV3, "%s: netisr_dispatch(NETISR_IGMP, %p)", __func__, m); 2247189592Sbms netisr_dispatch(NETISR_IGMP, m); 2248189592Sbms 2249189592Sbms return (0); 2250189592Sbms} 2251189592Sbms 2252189592Sbms/* 2253189592Sbms * Process a state change from the upper layer for the given IPv4 group. 2254189592Sbms * 2255189592Sbms * Each socket holds a reference on the in_multi in its own ip_moptions. 2256189592Sbms * The socket layer will have made the necessary updates to.the group 2257189592Sbms * state, it is now up to IGMP to issue a state change report if there 2258189592Sbms * has been any change between T0 (when the last state-change was issued) 2259189592Sbms * and T1 (now). 2260189592Sbms * 2261189592Sbms * We use the IGMPv3 state machine at group level. The IGMP module 2262189592Sbms * however makes the decision as to which IGMP protocol version to speak. 2263189592Sbms * A state change *from* INCLUDE {} always means an initial join. 2264189592Sbms * A state change *to* INCLUDE {} always means a final leave. 2265189592Sbms * 2266189592Sbms * FUTURE: If IGIF_V3LITE is enabled for this interface, then we can 2267189592Sbms * save ourselves a bunch of work; any exclusive mode groups need not 2268189592Sbms * compute source filter lists. 2269189592Sbms * 2270189592Sbms * VIMAGE: curvnet should have been set by caller, as this routine 2271189592Sbms * is called from the socket option handlers. 2272189592Sbms */ 2273189592Sbmsint 2274189592Sbmsigmp_change_state(struct in_multi *inm) 2275189592Sbms{ 2276189592Sbms struct igmp_ifinfo *igi; 2277189592Sbms struct ifnet *ifp; 2278189592Sbms int error; 2279189592Sbms 2280189592Sbms IN_MULTI_LOCK_ASSERT(); 2281189592Sbms 2282189592Sbms error = 0; 2283189592Sbms 2284189592Sbms /* 2285189592Sbms * Try to detect if the upper layer just asked us to change state 2286189592Sbms * for an interface which has now gone away. 2287189592Sbms */ 2288189592Sbms KASSERT(inm->inm_ifma != NULL, ("%s: no ifma", __func__)); 2289189592Sbms ifp = inm->inm_ifma->ifma_ifp; 2290189592Sbms if (ifp != NULL) { 2291189592Sbms /* 2292189592Sbms * Sanity check that netinet's notion of ifp is the 2293189592Sbms * same as net's. 2294189592Sbms */ 2295189592Sbms KASSERT(inm->inm_ifp == ifp, ("%s: bad ifp", __func__)); 2296189592Sbms } 2297189592Sbms 2298189592Sbms IGMP_LOCK(); 2299189592Sbms 2300189592Sbms igi = ((struct in_ifinfo *)ifp->if_afdata[AF_INET])->ii_igmp; 2301189592Sbms KASSERT(igi != NULL, ("%s: no igmp_ifinfo for ifp %p", __func__, ifp)); 2302189592Sbms 2303189592Sbms /* 2304189592Sbms * If we detect a state transition to or from MCAST_UNDEFINED 2305189592Sbms * for this group, then we are starting or finishing an IGMP 2306189592Sbms * life cycle for this group. 2307189592Sbms */ 2308189592Sbms if (inm->inm_st[1].iss_fmode != inm->inm_st[0].iss_fmode) { 2309189592Sbms CTR3(KTR_IGMPV3, "%s: inm transition %d -> %d", __func__, 2310189592Sbms inm->inm_st[0].iss_fmode, inm->inm_st[1].iss_fmode); 2311189592Sbms if (inm->inm_st[0].iss_fmode == MCAST_UNDEFINED) { 2312189592Sbms CTR1(KTR_IGMPV3, "%s: initial join", __func__); 2313189592Sbms error = igmp_initial_join(inm, igi); 2314189592Sbms goto out_locked; 2315189592Sbms } else if (inm->inm_st[1].iss_fmode == MCAST_UNDEFINED) { 2316189592Sbms CTR1(KTR_IGMPV3, "%s: final leave", __func__); 2317189592Sbms igmp_final_leave(inm, igi); 2318189592Sbms goto out_locked; 2319189592Sbms } 2320189592Sbms } else { 2321189592Sbms CTR1(KTR_IGMPV3, "%s: filter set change", __func__); 2322189592Sbms } 2323189592Sbms 2324189592Sbms error = igmp_handle_state_change(inm, igi); 2325189592Sbms 2326189592Sbmsout_locked: 2327189592Sbms IGMP_UNLOCK(); 2328189592Sbms return (error); 2329189592Sbms} 2330189592Sbms 2331189592Sbms/* 2332189592Sbms * Perform the initial join for an IGMP group. 2333189592Sbms * 2334189592Sbms * When joining a group: 2335189592Sbms * If the group should have its IGMP traffic suppressed, do nothing. 2336189592Sbms * IGMPv1 starts sending IGMPv1 host membership reports. 2337189592Sbms * IGMPv2 starts sending IGMPv2 host membership reports. 2338189592Sbms * IGMPv3 will schedule an IGMPv3 state-change report containing the 2339189592Sbms * initial state of the membership. 2340189592Sbms */ 2341189592Sbmsstatic int 2342189592Sbmsigmp_initial_join(struct in_multi *inm, struct igmp_ifinfo *igi) 2343189592Sbms{ 2344189592Sbms struct ifnet *ifp; 2345189592Sbms struct ifqueue *ifq; 2346189592Sbms int error, retval, syncstates; 2347189592Sbms 2348189592Sbms CTR4(KTR_IGMPV3, "%s: initial join %s on ifp %p(%s)", 2349189592Sbms __func__, inet_ntoa(inm->inm_addr), inm->inm_ifp, 2350189592Sbms inm->inm_ifp->if_xname); 2351189592Sbms 2352189592Sbms error = 0; 2353189592Sbms syncstates = 1; 2354189592Sbms 2355189592Sbms ifp = inm->inm_ifp; 2356189592Sbms 2357189592Sbms IN_MULTI_LOCK_ASSERT(); 2358189592Sbms IGMP_LOCK_ASSERT(); 2359189592Sbms 2360189592Sbms KASSERT(igi && igi->igi_ifp == ifp, ("%s: inconsistent ifp", __func__)); 2361189592Sbms 2362189592Sbms /* 2363189592Sbms * Groups joined on loopback or marked as 'not reported', 2364189592Sbms * e.g. 224.0.0.1, enter the IGMP_SILENT_MEMBER state and 2365189592Sbms * are never reported in any IGMP protocol exchanges. 2366189592Sbms * All other groups enter the appropriate IGMP state machine 2367189592Sbms * for the version in use on this link. 2368189592Sbms * A link marked as IGIF_SILENT causes IGMP to be completely 2369189592Sbms * disabled for the link. 2370189592Sbms */ 2371189592Sbms if ((ifp->if_flags & IFF_LOOPBACK) || 2372189592Sbms (igi->igi_flags & IGIF_SILENT) || 2373189592Sbms !igmp_isgroupreported(inm->inm_addr)) { 2374189592Sbms CTR1(KTR_IGMPV3, 2375189592Sbms"%s: not kicking state machine for silent group", __func__); 2376189592Sbms inm->inm_state = IGMP_SILENT_MEMBER; 2377189592Sbms inm->inm_timer = 0; 2378189592Sbms } else { 2379189592Sbms /* 2380189592Sbms * Deal with overlapping in_multi lifecycle. 2381189592Sbms * If this group was LEAVING, then make sure 2382189592Sbms * we drop the reference we picked up to keep the 2383189592Sbms * group around for the final INCLUDE {} enqueue. 2384189592Sbms */ 2385189592Sbms if (igi->igi_version == IGMP_VERSION_3 && 2386189592Sbms inm->inm_state == IGMP_LEAVING_MEMBER) 2387189592Sbms inm_release_locked(inm); 2388189592Sbms 2389189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 2390189592Sbms 2391189592Sbms switch (igi->igi_version) { 2392189592Sbms case IGMP_VERSION_1: 2393189592Sbms case IGMP_VERSION_2: 2394189592Sbms inm->inm_state = IGMP_IDLE_MEMBER; 2395189592Sbms error = igmp_v1v2_queue_report(inm, 2396189592Sbms (igi->igi_version == IGMP_VERSION_2) ? 2397189592Sbms IGMP_v2_HOST_MEMBERSHIP_REPORT : 2398189592Sbms IGMP_v1_HOST_MEMBERSHIP_REPORT); 2399189592Sbms if (error == 0) { 2400189592Sbms inm->inm_timer = IGMP_RANDOM_DELAY( 2401189592Sbms IGMP_V1V2_MAX_RI * PR_FASTHZ); 2402189592Sbms V_current_state_timers_running = 1; 2403189592Sbms } 2404189592Sbms break; 2405189592Sbms 2406189592Sbms case IGMP_VERSION_3: 2407189592Sbms /* 2408189592Sbms * Defer update of T0 to T1, until the first copy 2409189592Sbms * of the state change has been transmitted. 2410189592Sbms */ 2411189592Sbms syncstates = 0; 2412189592Sbms 2413189592Sbms /* 2414189592Sbms * Immediately enqueue a State-Change Report for 2415189592Sbms * this interface, freeing any previous reports. 2416189592Sbms * Don't kick the timers if there is nothing to do, 2417189592Sbms * or if an error occurred. 2418189592Sbms */ 2419189592Sbms ifq = &inm->inm_scq; 2420189592Sbms _IF_DRAIN(ifq); 2421189592Sbms retval = igmp_v3_enqueue_group_record(ifq, inm, 1, 2422189592Sbms 0, 0); 2423189592Sbms CTR2(KTR_IGMPV3, "%s: enqueue record = %d", 2424189592Sbms __func__, retval); 2425189592Sbms if (retval <= 0) { 2426189592Sbms error = retval * -1; 2427189592Sbms break; 2428189592Sbms } 2429189592Sbms 2430189592Sbms /* 2431189592Sbms * Schedule transmission of pending state-change 2432189592Sbms * report up to RV times for this link. The timer 2433189592Sbms * will fire at the next igmp_fasttimo (~200ms), 2434189592Sbms * giving us an opportunity to merge the reports. 2435189592Sbms */ 2436189592Sbms if (igi->igi_flags & IGIF_LOOPBACK) { 2437189592Sbms inm->inm_scrv = 1; 2438189592Sbms } else { 2439189592Sbms KASSERT(igi->igi_rv > 1, 2440189592Sbms ("%s: invalid robustness %d", __func__, 2441189592Sbms igi->igi_rv)); 2442189592Sbms inm->inm_scrv = igi->igi_rv; 2443189592Sbms } 2444189592Sbms inm->inm_sctimer = 1; 2445189592Sbms V_state_change_timers_running = 1; 2446189592Sbms 2447189592Sbms error = 0; 2448189592Sbms break; 2449189592Sbms } 2450189592Sbms } 2451189592Sbms 2452189592Sbms /* 2453189592Sbms * Only update the T0 state if state change is atomic, 2454189592Sbms * i.e. we don't need to wait for a timer to fire before we 2455189592Sbms * can consider the state change to have been communicated. 2456189592Sbms */ 2457189592Sbms if (syncstates) { 2458189592Sbms inm_commit(inm); 2459189592Sbms CTR3(KTR_IGMPV3, "%s: T1 -> T0 for %s/%s", __func__, 2460189592Sbms inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname); 2461189592Sbms } 2462189592Sbms 2463189592Sbms return (error); 2464189592Sbms} 2465189592Sbms 2466189592Sbms/* 2467189592Sbms * Issue an intermediate state change during the IGMP life-cycle. 2468189592Sbms */ 2469189592Sbmsstatic int 2470189592Sbmsigmp_handle_state_change(struct in_multi *inm, struct igmp_ifinfo *igi) 2471189592Sbms{ 2472189592Sbms struct ifnet *ifp; 2473189592Sbms int retval; 2474189592Sbms 2475189592Sbms CTR4(KTR_IGMPV3, "%s: state change for %s on ifp %p(%s)", 2476189592Sbms __func__, inet_ntoa(inm->inm_addr), inm->inm_ifp, 2477189592Sbms inm->inm_ifp->if_xname); 2478189592Sbms 2479189592Sbms ifp = inm->inm_ifp; 2480189592Sbms 2481189592Sbms IN_MULTI_LOCK_ASSERT(); 2482189592Sbms IGMP_LOCK_ASSERT(); 2483189592Sbms 2484189592Sbms KASSERT(igi && igi->igi_ifp == ifp, ("%s: inconsistent ifp", __func__)); 2485189592Sbms 2486189592Sbms if ((ifp->if_flags & IFF_LOOPBACK) || 2487189592Sbms (igi->igi_flags & IGIF_SILENT) || 2488189592Sbms !igmp_isgroupreported(inm->inm_addr) || 2489189592Sbms (igi->igi_version != IGMP_VERSION_3)) { 2490189592Sbms if (!igmp_isgroupreported(inm->inm_addr)) { 2491189592Sbms CTR1(KTR_IGMPV3, 2492189592Sbms"%s: not kicking state machine for silent group", __func__); 2493189592Sbms } 2494189592Sbms CTR1(KTR_IGMPV3, "%s: nothing to do", __func__); 2495189592Sbms inm_commit(inm); 2496189592Sbms CTR3(KTR_IGMPV3, "%s: T1 -> T0 for %s/%s", __func__, 2497189592Sbms inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname); 2498189592Sbms return (0); 2499189592Sbms } 2500189592Sbms 2501189592Sbms _IF_DRAIN(&inm->inm_scq); 2502189592Sbms 2503189592Sbms retval = igmp_v3_enqueue_group_record(&inm->inm_scq, inm, 1, 0, 0); 2504189592Sbms CTR2(KTR_IGMPV3, "%s: enqueue record = %d", __func__, retval); 2505189592Sbms if (retval <= 0) 2506189592Sbms return (-retval); 2507189592Sbms 2508189592Sbms /* 2509189592Sbms * If record(s) were enqueued, start the state-change 2510189592Sbms * report timer for this group. 2511189592Sbms */ 2512189592Sbms inm->inm_scrv = ((igi->igi_flags & IGIF_LOOPBACK) ? 1 : igi->igi_rv); 2513189592Sbms inm->inm_sctimer = 1; 2514189592Sbms V_state_change_timers_running = 1; 2515189592Sbms 2516189592Sbms return (0); 2517189592Sbms} 2518189592Sbms 2519189592Sbms/* 2520189592Sbms * Perform the final leave for an IGMP group. 2521189592Sbms * 2522189592Sbms * When leaving a group: 2523189592Sbms * IGMPv1 does nothing. 2524189592Sbms * IGMPv2 sends a host leave message, if and only if we are the reporter. 2525189592Sbms * IGMPv3 enqueues a state-change report containing a transition 2526189592Sbms * to INCLUDE {} for immediate transmission. 2527189592Sbms */ 2528189592Sbmsstatic void 2529189592Sbmsigmp_final_leave(struct in_multi *inm, struct igmp_ifinfo *igi) 2530189592Sbms{ 2531189592Sbms int syncstates; 2532189592Sbms 2533189592Sbms syncstates = 1; 2534189592Sbms 2535189592Sbms CTR4(KTR_IGMPV3, "%s: final leave %s on ifp %p(%s)", 2536189592Sbms __func__, inet_ntoa(inm->inm_addr), inm->inm_ifp, 2537189592Sbms inm->inm_ifp->if_xname); 2538189592Sbms 2539189592Sbms IN_MULTI_LOCK_ASSERT(); 2540189592Sbms IGMP_LOCK_ASSERT(); 2541189592Sbms 2542189592Sbms switch (inm->inm_state) { 2543189592Sbms case IGMP_NOT_MEMBER: 2544189592Sbms case IGMP_SILENT_MEMBER: 2545189592Sbms case IGMP_LEAVING_MEMBER: 2546189592Sbms /* Already leaving or left; do nothing. */ 2547189592Sbms CTR1(KTR_IGMPV3, 2548189592Sbms"%s: not kicking state machine for silent group", __func__); 2549189592Sbms break; 2550189592Sbms case IGMP_REPORTING_MEMBER: 2551189592Sbms case IGMP_IDLE_MEMBER: 2552189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 2553189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 2554189592Sbms if (igi->igi_version == IGMP_VERSION_2) { 2555189592Sbms#ifdef INVARIANTS 2556189592Sbms if (inm->inm_state == IGMP_G_QUERY_PENDING_MEMBER || 2557189592Sbms inm->inm_state == IGMP_SG_QUERY_PENDING_MEMBER) 2558189592Sbms panic("%s: IGMPv3 state reached, not IGMPv3 mode", 2559189592Sbms __func__); 2560189592Sbms#endif 2561189592Sbms igmp_v1v2_queue_report(inm, IGMP_HOST_LEAVE_MESSAGE); 2562189592Sbms inm->inm_state = IGMP_NOT_MEMBER; 2563189592Sbms } else if (igi->igi_version == IGMP_VERSION_3) { 2564189592Sbms /* 2565189592Sbms * Stop group timer and all pending reports. 2566189592Sbms * Immediately enqueue a state-change report 2567189592Sbms * TO_IN {} to be sent on the next fast timeout, 2568189592Sbms * giving us an opportunity to merge reports. 2569189592Sbms */ 2570189592Sbms _IF_DRAIN(&inm->inm_scq); 2571189592Sbms inm->inm_timer = 0; 2572189592Sbms if (igi->igi_flags & IGIF_LOOPBACK) { 2573189592Sbms inm->inm_scrv = 1; 2574189592Sbms } else { 2575189592Sbms inm->inm_scrv = igi->igi_rv; 2576189592Sbms } 2577189592Sbms CTR4(KTR_IGMPV3, "%s: Leaving %s/%s with %d " 2578189592Sbms "pending retransmissions.", __func__, 2579189592Sbms inet_ntoa(inm->inm_addr), 2580189592Sbms inm->inm_ifp->if_xname, inm->inm_scrv); 2581189592Sbms if (inm->inm_scrv == 0) { 2582189592Sbms inm->inm_state = IGMP_NOT_MEMBER; 2583189592Sbms inm->inm_sctimer = 0; 2584189592Sbms } else { 2585189592Sbms int retval; 2586189592Sbms 2587189592Sbms inm_acquire_locked(inm); 2588189592Sbms 2589189592Sbms retval = igmp_v3_enqueue_group_record( 2590189592Sbms &inm->inm_scq, inm, 1, 0, 0); 2591189592Sbms KASSERT(retval != 0, 2592189592Sbms ("%s: enqueue record = %d", __func__, 2593189592Sbms retval)); 2594189592Sbms 2595189592Sbms inm->inm_state = IGMP_LEAVING_MEMBER; 2596189592Sbms inm->inm_sctimer = 1; 2597189592Sbms V_state_change_timers_running = 1; 2598189592Sbms syncstates = 0; 2599189592Sbms } 2600189592Sbms break; 2601189592Sbms } 2602189592Sbms break; 2603189592Sbms case IGMP_LAZY_MEMBER: 2604189592Sbms case IGMP_SLEEPING_MEMBER: 2605189592Sbms case IGMP_AWAKENING_MEMBER: 2606189592Sbms /* Our reports are suppressed; do nothing. */ 2607189592Sbms break; 2608189592Sbms } 2609189592Sbms 2610189592Sbms if (syncstates) { 2611189592Sbms inm_commit(inm); 2612189592Sbms CTR3(KTR_IGMPV3, "%s: T1 -> T0 for %s/%s", __func__, 2613189592Sbms inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname); 2614189592Sbms inm->inm_st[1].iss_fmode = MCAST_UNDEFINED; 2615189592Sbms CTR3(KTR_IGMPV3, "%s: T1 now MCAST_UNDEFINED for %s/%s", 2616189592Sbms __func__, inet_ntoa(inm->inm_addr), inm->inm_ifp->if_xname); 2617189592Sbms } 2618189592Sbms} 2619189592Sbms 2620189592Sbms/* 2621189592Sbms * Enqueue an IGMPv3 group record to the given output queue. 2622189592Sbms * 2623189592Sbms * XXX This function could do with having the allocation code 2624189592Sbms * split out, and the multiple-tree-walks coalesced into a single 2625189592Sbms * routine as has been done in igmp_v3_enqueue_filter_change(). 2626189592Sbms * 2627189592Sbms * If is_state_change is zero, a current-state record is appended. 2628189592Sbms * If is_state_change is non-zero, a state-change report is appended. 2629189592Sbms * 2630189592Sbms * If is_group_query is non-zero, an mbuf packet chain is allocated. 2631189592Sbms * If is_group_query is zero, and if there is a packet with free space 2632189592Sbms * at the tail of the queue, it will be appended to providing there 2633189592Sbms * is enough free space. 2634189592Sbms * Otherwise a new mbuf packet chain is allocated. 2635189592Sbms * 2636189592Sbms * If is_source_query is non-zero, each source is checked to see if 2637189592Sbms * it was recorded for a Group-Source query, and will be omitted if 2638189592Sbms * it is not both in-mode and recorded. 2639189592Sbms * 2640189592Sbms * The function will attempt to allocate leading space in the packet 2641189592Sbms * for the IP/IGMP header to be prepended without fragmenting the chain. 2642189592Sbms * 2643189592Sbms * If successful the size of all data appended to the queue is returned, 2644189592Sbms * otherwise an error code less than zero is returned, or zero if 2645189592Sbms * no record(s) were appended. 2646189592Sbms */ 2647189592Sbmsstatic int 2648189592Sbmsigmp_v3_enqueue_group_record(struct ifqueue *ifq, struct in_multi *inm, 2649189592Sbms const int is_state_change, const int is_group_query, 2650189592Sbms const int is_source_query) 2651189592Sbms{ 2652189592Sbms struct igmp_grouprec ig; 2653189592Sbms struct igmp_grouprec *pig; 2654189592Sbms struct ifnet *ifp; 2655189592Sbms struct ip_msource *ims, *nims; 2656189592Sbms struct mbuf *m0, *m, *md; 2657189592Sbms int error, is_filter_list_change; 2658189592Sbms int minrec0len, m0srcs, msrcs, nbytes, off; 2659189592Sbms int record_has_sources; 2660189592Sbms int now; 2661189592Sbms int type; 2662189592Sbms in_addr_t naddr; 2663189592Sbms uint8_t mode; 2664189592Sbms 2665189592Sbms IN_MULTI_LOCK_ASSERT(); 2666189592Sbms 2667189592Sbms error = 0; 2668189592Sbms ifp = inm->inm_ifp; 2669189592Sbms is_filter_list_change = 0; 2670189592Sbms m = NULL; 2671189592Sbms m0 = NULL; 2672189592Sbms m0srcs = 0; 2673189592Sbms msrcs = 0; 2674189592Sbms nbytes = 0; 2675189592Sbms nims = NULL; 2676189592Sbms record_has_sources = 1; 2677189592Sbms pig = NULL; 2678189592Sbms type = IGMP_DO_NOTHING; 2679189592Sbms mode = inm->inm_st[1].iss_fmode; 2680189592Sbms 2681189592Sbms /* 2682189592Sbms * If we did not transition out of ASM mode during t0->t1, 2683189592Sbms * and there are no source nodes to process, we can skip 2684189592Sbms * the generation of source records. 2685189592Sbms */ 2686189592Sbms if (inm->inm_st[0].iss_asm > 0 && inm->inm_st[1].iss_asm > 0 && 2687189592Sbms inm->inm_nsrc == 0) 2688189592Sbms record_has_sources = 0; 2689189592Sbms 2690189592Sbms if (is_state_change) { 2691189592Sbms /* 2692189592Sbms * Queue a state change record. 2693189592Sbms * If the mode did not change, and there are non-ASM 2694189592Sbms * listeners or source filters present, 2695189592Sbms * we potentially need to issue two records for the group. 2696189592Sbms * If we are transitioning to MCAST_UNDEFINED, we need 2697189592Sbms * not send any sources. 2698189592Sbms * If there are ASM listeners, and there was no filter 2699189592Sbms * mode transition of any kind, do nothing. 2700189592Sbms */ 2701189592Sbms if (mode != inm->inm_st[0].iss_fmode) { 2702189592Sbms if (mode == MCAST_EXCLUDE) { 2703189592Sbms CTR1(KTR_IGMPV3, "%s: change to EXCLUDE", 2704189592Sbms __func__); 2705189592Sbms type = IGMP_CHANGE_TO_EXCLUDE_MODE; 2706189592Sbms } else { 2707189592Sbms CTR1(KTR_IGMPV3, "%s: change to INCLUDE", 2708189592Sbms __func__); 2709189592Sbms type = IGMP_CHANGE_TO_INCLUDE_MODE; 2710189592Sbms if (mode == MCAST_UNDEFINED) 2711189592Sbms record_has_sources = 0; 2712189592Sbms } 2713189592Sbms } else { 2714189592Sbms if (record_has_sources) { 2715189592Sbms is_filter_list_change = 1; 2716189592Sbms } else { 2717189592Sbms type = IGMP_DO_NOTHING; 2718189592Sbms } 2719189592Sbms } 2720189592Sbms } else { 2721189592Sbms /* 2722189592Sbms * Queue a current state record. 2723189592Sbms */ 2724189592Sbms if (mode == MCAST_EXCLUDE) { 2725189592Sbms type = IGMP_MODE_IS_EXCLUDE; 2726189592Sbms } else if (mode == MCAST_INCLUDE) { 2727189592Sbms type = IGMP_MODE_IS_INCLUDE; 2728189592Sbms KASSERT(inm->inm_st[1].iss_asm == 0, 2729189592Sbms ("%s: inm %p is INCLUDE but ASM count is %d", 2730189592Sbms __func__, inm, inm->inm_st[1].iss_asm)); 2731189592Sbms } 2732189592Sbms } 2733189592Sbms 2734189592Sbms /* 2735189592Sbms * Generate the filter list changes using a separate function. 2736189592Sbms */ 2737189592Sbms if (is_filter_list_change) 2738189592Sbms return (igmp_v3_enqueue_filter_change(ifq, inm)); 2739189592Sbms 2740189592Sbms if (type == IGMP_DO_NOTHING) { 2741189592Sbms CTR3(KTR_IGMPV3, "%s: nothing to do for %s/%s", 2742189592Sbms __func__, inet_ntoa(inm->inm_addr), 2743189592Sbms inm->inm_ifp->if_xname); 2744189592Sbms return (0); 2745189592Sbms } 2746189592Sbms 2747189592Sbms /* 2748189592Sbms * If any sources are present, we must be able to fit at least 2749189592Sbms * one in the trailing space of the tail packet's mbuf, 2750189592Sbms * ideally more. 2751189592Sbms */ 2752189592Sbms minrec0len = sizeof(struct igmp_grouprec); 2753189592Sbms if (record_has_sources) 2754189592Sbms minrec0len += sizeof(in_addr_t); 2755189592Sbms 2756189592Sbms CTR4(KTR_IGMPV3, "%s: queueing %s for %s/%s", __func__, 2757189592Sbms igmp_rec_type_to_str(type), inet_ntoa(inm->inm_addr), 2758189592Sbms inm->inm_ifp->if_xname); 2759189592Sbms 2760189592Sbms /* 2761189592Sbms * Check if we have a packet in the tail of the queue for this 2762189592Sbms * group into which the first group record for this group will fit. 2763189592Sbms * Otherwise allocate a new packet. 2764189592Sbms * Always allocate leading space for IP+RA_OPT+IGMP+REPORT. 2765189592Sbms * Note: Group records for G/GSR query responses MUST be sent 2766189592Sbms * in their own packet. 2767189592Sbms */ 2768189592Sbms m0 = ifq->ifq_tail; 2769189592Sbms if (!is_group_query && 2770189592Sbms m0 != NULL && 2771189592Sbms (m0->m_pkthdr.PH_vt.vt_nrecs + 1 <= IGMP_V3_REPORT_MAXRECS) && 2772189592Sbms (m0->m_pkthdr.len + minrec0len) < 2773189592Sbms (ifp->if_mtu - IGMP_LEADINGSPACE)) { 2774189592Sbms m0srcs = (ifp->if_mtu - m0->m_pkthdr.len - 2775189592Sbms sizeof(struct igmp_grouprec)) / sizeof(in_addr_t); 2776189592Sbms m = m0; 2777189592Sbms CTR1(KTR_IGMPV3, "%s: use existing packet", __func__); 2778189592Sbms } else { 2779189592Sbms if (_IF_QFULL(ifq)) { 2780189592Sbms CTR1(KTR_IGMPV3, "%s: outbound queue full", __func__); 2781189592Sbms return (-ENOMEM); 2782189592Sbms } 2783189592Sbms m = NULL; 2784189592Sbms m0srcs = (ifp->if_mtu - IGMP_LEADINGSPACE - 2785189592Sbms sizeof(struct igmp_grouprec)) / sizeof(in_addr_t); 2786190692Sbms if (!is_state_change && !is_group_query) { 2787189592Sbms m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2788190692Sbms if (m) 2789190692Sbms m->m_data += IGMP_LEADINGSPACE; 2790190692Sbms } 2791189592Sbms if (m == NULL) { 2792189592Sbms m = m_gethdr(M_DONTWAIT, MT_DATA); 2793189592Sbms if (m) 2794189592Sbms MH_ALIGN(m, IGMP_LEADINGSPACE); 2795189592Sbms } 2796189592Sbms if (m == NULL) 2797189592Sbms return (-ENOMEM); 2798189592Sbms 2799189592Sbms igmp_save_context(m, ifp); 2800189592Sbms 2801189592Sbms CTR1(KTR_IGMPV3, "%s: allocated first packet", __func__); 2802189592Sbms } 2803189592Sbms 2804189592Sbms /* 2805189592Sbms * Append group record. 2806189592Sbms * If we have sources, we don't know how many yet. 2807189592Sbms */ 2808189592Sbms ig.ig_type = type; 2809189592Sbms ig.ig_datalen = 0; 2810189592Sbms ig.ig_numsrc = 0; 2811189592Sbms ig.ig_group = inm->inm_addr; 2812189592Sbms if (!m_append(m, sizeof(struct igmp_grouprec), (void *)&ig)) { 2813189592Sbms if (m != m0) 2814189592Sbms m_freem(m); 2815189592Sbms CTR1(KTR_IGMPV3, "%s: m_append() failed.", __func__); 2816189592Sbms return (-ENOMEM); 2817189592Sbms } 2818189592Sbms nbytes += sizeof(struct igmp_grouprec); 2819189592Sbms 2820189592Sbms /* 2821189592Sbms * Append as many sources as will fit in the first packet. 2822189592Sbms * If we are appending to a new packet, the chain allocation 2823189592Sbms * may potentially use clusters; use m_getptr() in this case. 2824189592Sbms * If we are appending to an existing packet, we need to obtain 2825189592Sbms * a pointer to the group record after m_append(), in case a new 2826189592Sbms * mbuf was allocated. 2827189592Sbms * Only append sources which are in-mode at t1. If we are 2828189592Sbms * transitioning to MCAST_UNDEFINED state on the group, do not 2829189592Sbms * include source entries. 2830189592Sbms * Only report recorded sources in our filter set when responding 2831189592Sbms * to a group-source query. 2832189592Sbms */ 2833189592Sbms if (record_has_sources) { 2834189592Sbms if (m == m0) { 2835189592Sbms md = m_last(m); 2836189592Sbms pig = (struct igmp_grouprec *)(mtod(md, uint8_t *) + 2837189592Sbms md->m_len - nbytes); 2838189592Sbms } else { 2839189592Sbms md = m_getptr(m, 0, &off); 2840189592Sbms pig = (struct igmp_grouprec *)(mtod(md, uint8_t *) + 2841189592Sbms off); 2842189592Sbms } 2843189592Sbms msrcs = 0; 2844189592Sbms RB_FOREACH_SAFE(ims, ip_msource_tree, &inm->inm_srcs, nims) { 2845189592Sbms CTR2(KTR_IGMPV3, "%s: visit node %s", __func__, 2846189592Sbms inet_ntoa_haddr(ims->ims_haddr)); 2847189592Sbms now = ims_get_mode(inm, ims, 1); 2848189592Sbms CTR2(KTR_IGMPV3, "%s: node is %d", __func__, now); 2849189592Sbms if ((now != mode) || 2850189592Sbms (now == mode && mode == MCAST_UNDEFINED)) { 2851189592Sbms CTR1(KTR_IGMPV3, "%s: skip node", __func__); 2852189592Sbms continue; 2853189592Sbms } 2854189592Sbms if (is_source_query && ims->ims_stp == 0) { 2855189592Sbms CTR1(KTR_IGMPV3, "%s: skip unrecorded node", 2856189592Sbms __func__); 2857189592Sbms continue; 2858189592Sbms } 2859189592Sbms CTR1(KTR_IGMPV3, "%s: append node", __func__); 2860189592Sbms naddr = htonl(ims->ims_haddr); 2861189592Sbms if (!m_append(m, sizeof(in_addr_t), (void *)&naddr)) { 2862189592Sbms if (m != m0) 2863189592Sbms m_freem(m); 2864189592Sbms CTR1(KTR_IGMPV3, "%s: m_append() failed.", 2865189592Sbms __func__); 2866189592Sbms return (-ENOMEM); 2867189592Sbms } 2868189592Sbms nbytes += sizeof(in_addr_t); 2869189592Sbms ++msrcs; 2870189592Sbms if (msrcs == m0srcs) 2871189592Sbms break; 2872189592Sbms } 2873189592Sbms CTR2(KTR_IGMPV3, "%s: msrcs is %d this packet", __func__, 2874189592Sbms msrcs); 2875189592Sbms pig->ig_numsrc = htons(msrcs); 2876189592Sbms nbytes += (msrcs * sizeof(in_addr_t)); 2877189592Sbms } 2878189592Sbms 2879189592Sbms if (is_source_query && msrcs == 0) { 2880189592Sbms CTR1(KTR_IGMPV3, "%s: no recorded sources to report", __func__); 2881189592Sbms if (m != m0) 2882189592Sbms m_freem(m); 2883189592Sbms return (0); 2884189592Sbms } 2885189592Sbms 2886189592Sbms /* 2887189592Sbms * We are good to go with first packet. 2888189592Sbms */ 2889189592Sbms if (m != m0) { 2890189592Sbms CTR1(KTR_IGMPV3, "%s: enqueueing first packet", __func__); 2891189592Sbms m->m_pkthdr.PH_vt.vt_nrecs = 1; 2892189592Sbms _IF_ENQUEUE(ifq, m); 2893189592Sbms } else 2894189592Sbms m->m_pkthdr.PH_vt.vt_nrecs++; 2895189592Sbms 2896189592Sbms /* 2897189592Sbms * No further work needed if no source list in packet(s). 2898189592Sbms */ 2899189592Sbms if (!record_has_sources) 2900189592Sbms return (nbytes); 2901189592Sbms 2902189592Sbms /* 2903189592Sbms * Whilst sources remain to be announced, we need to allocate 2904189592Sbms * a new packet and fill out as many sources as will fit. 2905189592Sbms * Always try for a cluster first. 2906189592Sbms */ 2907189592Sbms while (nims != NULL) { 2908189592Sbms if (_IF_QFULL(ifq)) { 2909189592Sbms CTR1(KTR_IGMPV3, "%s: outbound queue full", __func__); 2910189592Sbms return (-ENOMEM); 2911189592Sbms } 2912189592Sbms m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2913190692Sbms if (m) 2914190692Sbms m->m_data += IGMP_LEADINGSPACE; 2915189592Sbms if (m == NULL) { 2916189592Sbms m = m_gethdr(M_DONTWAIT, MT_DATA); 2917189592Sbms if (m) 2918189592Sbms MH_ALIGN(m, IGMP_LEADINGSPACE); 2919189592Sbms } 2920189592Sbms if (m == NULL) 2921189592Sbms return (-ENOMEM); 2922189592Sbms igmp_save_context(m, ifp); 2923189592Sbms md = m_getptr(m, 0, &off); 2924189592Sbms pig = (struct igmp_grouprec *)(mtod(md, uint8_t *) + off); 2925189592Sbms CTR1(KTR_IGMPV3, "%s: allocated next packet", __func__); 2926189592Sbms 2927189592Sbms if (!m_append(m, sizeof(struct igmp_grouprec), (void *)&ig)) { 2928189592Sbms if (m != m0) 2929189592Sbms m_freem(m); 2930189592Sbms CTR1(KTR_IGMPV3, "%s: m_append() failed.", __func__); 2931189592Sbms return (-ENOMEM); 2932189592Sbms } 2933189592Sbms m->m_pkthdr.PH_vt.vt_nrecs = 1; 2934189592Sbms nbytes += sizeof(struct igmp_grouprec); 2935189592Sbms 2936189592Sbms m0srcs = (ifp->if_mtu - IGMP_LEADINGSPACE - 2937189592Sbms sizeof(struct igmp_grouprec)) / sizeof(in_addr_t); 2938189592Sbms 2939189592Sbms msrcs = 0; 2940189592Sbms RB_FOREACH_FROM(ims, ip_msource_tree, nims) { 2941189592Sbms CTR2(KTR_IGMPV3, "%s: visit node %s", __func__, 2942189592Sbms inet_ntoa_haddr(ims->ims_haddr)); 2943189592Sbms now = ims_get_mode(inm, ims, 1); 2944189592Sbms if ((now != mode) || 2945189592Sbms (now == mode && mode == MCAST_UNDEFINED)) { 2946189592Sbms CTR1(KTR_IGMPV3, "%s: skip node", __func__); 2947189592Sbms continue; 2948189592Sbms } 2949189592Sbms if (is_source_query && ims->ims_stp == 0) { 2950189592Sbms CTR1(KTR_IGMPV3, "%s: skip unrecorded node", 2951189592Sbms __func__); 2952189592Sbms continue; 2953189592Sbms } 2954189592Sbms CTR1(KTR_IGMPV3, "%s: append node", __func__); 2955189592Sbms naddr = htonl(ims->ims_haddr); 2956189592Sbms if (!m_append(m, sizeof(in_addr_t), (void *)&naddr)) { 2957189592Sbms if (m != m0) 2958189592Sbms m_freem(m); 2959189592Sbms CTR1(KTR_IGMPV3, "%s: m_append() failed.", 2960189592Sbms __func__); 2961189592Sbms return (-ENOMEM); 2962189592Sbms } 2963189592Sbms ++msrcs; 2964189592Sbms if (msrcs == m0srcs) 2965189592Sbms break; 2966189592Sbms } 2967189592Sbms pig->ig_numsrc = htons(msrcs); 2968189592Sbms nbytes += (msrcs * sizeof(in_addr_t)); 2969189592Sbms 2970189592Sbms CTR1(KTR_IGMPV3, "%s: enqueueing next packet", __func__); 2971189592Sbms _IF_ENQUEUE(ifq, m); 2972189592Sbms } 2973189592Sbms 2974189592Sbms return (nbytes); 2975189592Sbms} 2976189592Sbms 2977189592Sbms/* 2978189592Sbms * Type used to mark record pass completion. 2979189592Sbms * We exploit the fact we can cast to this easily from the 2980189592Sbms * current filter modes on each ip_msource node. 2981189592Sbms */ 2982189592Sbmstypedef enum { 2983189592Sbms REC_NONE = 0x00, /* MCAST_UNDEFINED */ 2984189592Sbms REC_ALLOW = 0x01, /* MCAST_INCLUDE */ 2985189592Sbms REC_BLOCK = 0x02, /* MCAST_EXCLUDE */ 2986189592Sbms REC_FULL = REC_ALLOW | REC_BLOCK 2987189592Sbms} rectype_t; 2988189592Sbms 2989189592Sbms/* 2990189592Sbms * Enqueue an IGMPv3 filter list change to the given output queue. 2991189592Sbms * 2992189592Sbms * Source list filter state is held in an RB-tree. When the filter list 2993189592Sbms * for a group is changed without changing its mode, we need to compute 2994189592Sbms * the deltas between T0 and T1 for each source in the filter set, 2995189592Sbms * and enqueue the appropriate ALLOW_NEW/BLOCK_OLD records. 2996189592Sbms * 2997189592Sbms * As we may potentially queue two record types, and the entire R-B tree 2998189592Sbms * needs to be walked at once, we break this out into its own function 2999189592Sbms * so we can generate a tightly packed queue of packets. 3000189592Sbms * 3001189592Sbms * XXX This could be written to only use one tree walk, although that makes 3002189592Sbms * serializing into the mbuf chains a bit harder. For now we do two walks 3003189592Sbms * which makes things easier on us, and it may or may not be harder on 3004189592Sbms * the L2 cache. 3005189592Sbms * 3006189592Sbms * If successful the size of all data appended to the queue is returned, 3007189592Sbms * otherwise an error code less than zero is returned, or zero if 3008189592Sbms * no record(s) were appended. 3009189592Sbms */ 3010189592Sbmsstatic int 3011189592Sbmsigmp_v3_enqueue_filter_change(struct ifqueue *ifq, struct in_multi *inm) 3012189592Sbms{ 3013189592Sbms static const int MINRECLEN = 3014189592Sbms sizeof(struct igmp_grouprec) + sizeof(in_addr_t); 3015189592Sbms struct ifnet *ifp; 3016189592Sbms struct igmp_grouprec ig; 3017189592Sbms struct igmp_grouprec *pig; 3018189592Sbms struct ip_msource *ims, *nims; 3019189592Sbms struct mbuf *m, *m0, *md; 3020189592Sbms in_addr_t naddr; 3021191657Sbms int m0srcs, nbytes, npbytes, off, rsrcs, schanged; 3022189592Sbms int nallow, nblock; 3023189592Sbms uint8_t mode, now, then; 3024189592Sbms rectype_t crt, drt, nrt; 3025189592Sbms 3026189592Sbms IN_MULTI_LOCK_ASSERT(); 3027189592Sbms 3028189592Sbms if (inm->inm_nsrc == 0 || 3029189592Sbms (inm->inm_st[0].iss_asm > 0 && inm->inm_st[1].iss_asm > 0)) 3030189592Sbms return (0); 3031189592Sbms 3032189592Sbms ifp = inm->inm_ifp; /* interface */ 3033189592Sbms mode = inm->inm_st[1].iss_fmode; /* filter mode at t1 */ 3034189592Sbms crt = REC_NONE; /* current group record type */ 3035189592Sbms drt = REC_NONE; /* mask of completed group record types */ 3036189592Sbms nrt = REC_NONE; /* record type for current node */ 3037189592Sbms m0srcs = 0; /* # source which will fit in current mbuf chain */ 3038189592Sbms nbytes = 0; /* # of bytes appended to group's state-change queue */ 3039191657Sbms npbytes = 0; /* # of bytes appended this packet */ 3040189592Sbms rsrcs = 0; /* # sources encoded in current record */ 3041189592Sbms schanged = 0; /* # nodes encoded in overall filter change */ 3042189592Sbms nallow = 0; /* # of source entries in ALLOW_NEW */ 3043189592Sbms nblock = 0; /* # of source entries in BLOCK_OLD */ 3044189592Sbms nims = NULL; /* next tree node pointer */ 3045189592Sbms 3046189592Sbms /* 3047189592Sbms * For each possible filter record mode. 3048189592Sbms * The first kind of source we encounter tells us which 3049189592Sbms * is the first kind of record we start appending. 3050189592Sbms * If a node transitioned to UNDEFINED at t1, its mode is treated 3051189592Sbms * as the inverse of the group's filter mode. 3052189592Sbms */ 3053189592Sbms while (drt != REC_FULL) { 3054189592Sbms do { 3055189592Sbms m0 = ifq->ifq_tail; 3056189592Sbms if (m0 != NULL && 3057189592Sbms (m0->m_pkthdr.PH_vt.vt_nrecs + 1 <= 3058189592Sbms IGMP_V3_REPORT_MAXRECS) && 3059189592Sbms (m0->m_pkthdr.len + MINRECLEN) < 3060189592Sbms (ifp->if_mtu - IGMP_LEADINGSPACE)) { 3061189592Sbms m = m0; 3062189592Sbms m0srcs = (ifp->if_mtu - m0->m_pkthdr.len - 3063189592Sbms sizeof(struct igmp_grouprec)) / 3064189592Sbms sizeof(in_addr_t); 3065189592Sbms CTR1(KTR_IGMPV3, 3066189592Sbms "%s: use previous packet", __func__); 3067189592Sbms } else { 3068189592Sbms m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 3069190692Sbms if (m) 3070190692Sbms m->m_data += IGMP_LEADINGSPACE; 3071189592Sbms if (m == NULL) { 3072189592Sbms m = m_gethdr(M_DONTWAIT, MT_DATA); 3073189592Sbms if (m) 3074189592Sbms MH_ALIGN(m, IGMP_LEADINGSPACE); 3075189592Sbms } 3076189592Sbms if (m == NULL) { 3077189592Sbms CTR1(KTR_IGMPV3, 3078189592Sbms "%s: m_get*() failed", __func__); 3079189592Sbms return (-ENOMEM); 3080189592Sbms } 3081189592Sbms m->m_pkthdr.PH_vt.vt_nrecs = 0; 3082189592Sbms igmp_save_context(m, ifp); 3083189592Sbms m0srcs = (ifp->if_mtu - IGMP_LEADINGSPACE - 3084189592Sbms sizeof(struct igmp_grouprec)) / 3085189592Sbms sizeof(in_addr_t); 3086191657Sbms npbytes = 0; 3087189592Sbms CTR1(KTR_IGMPV3, 3088189592Sbms "%s: allocated new packet", __func__); 3089189592Sbms } 3090189592Sbms /* 3091189592Sbms * Append the IGMP group record header to the 3092189592Sbms * current packet's data area. 3093189592Sbms * Recalculate pointer to free space for next 3094189592Sbms * group record, in case m_append() allocated 3095189592Sbms * a new mbuf or cluster. 3096189592Sbms */ 3097189592Sbms memset(&ig, 0, sizeof(ig)); 3098189592Sbms ig.ig_group = inm->inm_addr; 3099189592Sbms if (!m_append(m, sizeof(ig), (void *)&ig)) { 3100189592Sbms if (m != m0) 3101189592Sbms m_freem(m); 3102189592Sbms CTR1(KTR_IGMPV3, 3103189592Sbms "%s: m_append() failed", __func__); 3104189592Sbms return (-ENOMEM); 3105189592Sbms } 3106191657Sbms npbytes += sizeof(struct igmp_grouprec); 3107191657Sbms if (m != m0) { 3108191657Sbms /* new packet; offset in c hain */ 3109191657Sbms md = m_getptr(m, npbytes - 3110191657Sbms sizeof(struct igmp_grouprec), &off); 3111189592Sbms pig = (struct igmp_grouprec *)(mtod(md, 3112191657Sbms uint8_t *) + off); 3113189592Sbms } else { 3114191657Sbms /* current packet; offset from last append */ 3115191657Sbms md = m_last(m); 3116189592Sbms pig = (struct igmp_grouprec *)(mtod(md, 3117191657Sbms uint8_t *) + md->m_len - 3118191657Sbms sizeof(struct igmp_grouprec)); 3119189592Sbms } 3120189592Sbms /* 3121189592Sbms * Begin walking the tree for this record type 3122189592Sbms * pass, or continue from where we left off 3123189592Sbms * previously if we had to allocate a new packet. 3124189592Sbms * Only report deltas in-mode at t1. 3125189592Sbms * We need not report included sources as allowed 3126189592Sbms * if we are in inclusive mode on the group, 3127189592Sbms * however the converse is not true. 3128189592Sbms */ 3129189592Sbms rsrcs = 0; 3130189592Sbms if (nims == NULL) 3131189592Sbms nims = RB_MIN(ip_msource_tree, &inm->inm_srcs); 3132189592Sbms RB_FOREACH_FROM(ims, ip_msource_tree, nims) { 3133189592Sbms CTR2(KTR_IGMPV3, "%s: visit node %s", 3134189592Sbms __func__, inet_ntoa_haddr(ims->ims_haddr)); 3135189592Sbms now = ims_get_mode(inm, ims, 1); 3136189592Sbms then = ims_get_mode(inm, ims, 0); 3137189592Sbms CTR3(KTR_IGMPV3, "%s: mode: t0 %d, t1 %d", 3138189592Sbms __func__, then, now); 3139189592Sbms if (now == then) { 3140189592Sbms CTR1(KTR_IGMPV3, 3141189592Sbms "%s: skip unchanged", __func__); 3142189592Sbms continue; 3143189592Sbms } 3144189592Sbms if (mode == MCAST_EXCLUDE && 3145189592Sbms now == MCAST_INCLUDE) { 3146189592Sbms CTR1(KTR_IGMPV3, 3147189592Sbms "%s: skip IN src on EX group", 3148189592Sbms __func__); 3149189592Sbms continue; 3150189592Sbms } 3151189592Sbms nrt = (rectype_t)now; 3152189592Sbms if (nrt == REC_NONE) 3153189592Sbms nrt = (rectype_t)(~mode & REC_FULL); 3154189592Sbms if (schanged++ == 0) { 3155189592Sbms crt = nrt; 3156189592Sbms } else if (crt != nrt) 3157189592Sbms continue; 3158189592Sbms naddr = htonl(ims->ims_haddr); 3159189592Sbms if (!m_append(m, sizeof(in_addr_t), 3160189592Sbms (void *)&naddr)) { 3161189592Sbms if (m != m0) 3162189592Sbms m_freem(m); 3163189592Sbms CTR1(KTR_IGMPV3, 3164189592Sbms "%s: m_append() failed", __func__); 3165189592Sbms return (-ENOMEM); 3166189592Sbms } 3167189592Sbms nallow += !!(crt == REC_ALLOW); 3168189592Sbms nblock += !!(crt == REC_BLOCK); 3169189592Sbms if (++rsrcs == m0srcs) 3170189592Sbms break; 3171189592Sbms } 3172189592Sbms /* 3173189592Sbms * If we did not append any tree nodes on this 3174189592Sbms * pass, back out of allocations. 3175189592Sbms */ 3176189592Sbms if (rsrcs == 0) { 3177191657Sbms npbytes -= sizeof(struct igmp_grouprec); 3178189592Sbms if (m != m0) { 3179189592Sbms CTR1(KTR_IGMPV3, 3180189592Sbms "%s: m_free(m)", __func__); 3181189592Sbms m_freem(m); 3182189592Sbms } else { 3183189592Sbms CTR1(KTR_IGMPV3, 3184189592Sbms "%s: m_adj(m, -ig)", __func__); 3185189592Sbms m_adj(m, -((int)sizeof( 3186189592Sbms struct igmp_grouprec))); 3187189592Sbms } 3188189592Sbms continue; 3189189592Sbms } 3190191657Sbms npbytes += (rsrcs * sizeof(in_addr_t)); 3191189592Sbms if (crt == REC_ALLOW) 3192189592Sbms pig->ig_type = IGMP_ALLOW_NEW_SOURCES; 3193189592Sbms else if (crt == REC_BLOCK) 3194189592Sbms pig->ig_type = IGMP_BLOCK_OLD_SOURCES; 3195189592Sbms pig->ig_numsrc = htons(rsrcs); 3196189592Sbms /* 3197189592Sbms * Count the new group record, and enqueue this 3198189592Sbms * packet if it wasn't already queued. 3199189592Sbms */ 3200189592Sbms m->m_pkthdr.PH_vt.vt_nrecs++; 3201189592Sbms if (m != m0) 3202189592Sbms _IF_ENQUEUE(ifq, m); 3203191657Sbms nbytes += npbytes; 3204189592Sbms } while (nims != NULL); 3205189592Sbms drt |= crt; 3206189592Sbms crt = (~crt & REC_FULL); 3207189592Sbms } 3208189592Sbms 3209189592Sbms CTR3(KTR_IGMPV3, "%s: queued %d ALLOW_NEW, %d BLOCK_OLD", __func__, 3210189592Sbms nallow, nblock); 3211189592Sbms 3212189592Sbms return (nbytes); 3213189592Sbms} 3214189592Sbms 3215189592Sbmsstatic int 3216189592Sbmsigmp_v3_merge_state_changes(struct in_multi *inm, struct ifqueue *ifscq) 3217189592Sbms{ 3218189592Sbms struct ifqueue *gq; 3219189592Sbms struct mbuf *m; /* pending state-change */ 3220189592Sbms struct mbuf *m0; /* copy of pending state-change */ 3221189592Sbms struct mbuf *mt; /* last state-change in packet */ 3222189592Sbms int docopy, domerge; 3223189592Sbms u_int recslen; 3224189592Sbms 3225189592Sbms docopy = 0; 3226189592Sbms domerge = 0; 3227189592Sbms recslen = 0; 3228189592Sbms 3229189592Sbms IN_MULTI_LOCK_ASSERT(); 3230189592Sbms IGMP_LOCK_ASSERT(); 3231189592Sbms 3232189592Sbms /* 3233189592Sbms * If there are further pending retransmissions, make a writable 3234189592Sbms * copy of each queued state-change message before merging. 3235189592Sbms */ 3236189592Sbms if (inm->inm_scrv > 0) 3237189592Sbms docopy = 1; 3238189592Sbms 3239189592Sbms gq = &inm->inm_scq; 3240189592Sbms#ifdef KTR 3241189592Sbms if (gq->ifq_head == NULL) { 3242189592Sbms CTR2(KTR_IGMPV3, "%s: WARNING: queue for inm %p is empty", 3243189592Sbms __func__, inm); 3244189592Sbms } 3245189592Sbms#endif 3246189592Sbms 3247189592Sbms m = gq->ifq_head; 3248189592Sbms while (m != NULL) { 3249189592Sbms /* 3250189592Sbms * Only merge the report into the current packet if 3251189592Sbms * there is sufficient space to do so; an IGMPv3 report 3252189592Sbms * packet may only contain 65,535 group records. 3253189592Sbms * Always use a simple mbuf chain concatentation to do this, 3254189592Sbms * as large state changes for single groups may have 3255189592Sbms * allocated clusters. 3256189592Sbms */ 3257189592Sbms domerge = 0; 3258189592Sbms mt = ifscq->ifq_tail; 3259189592Sbms if (mt != NULL) { 3260189592Sbms recslen = m_length(m, NULL); 3261189592Sbms 3262189592Sbms if ((mt->m_pkthdr.PH_vt.vt_nrecs + 3263189592Sbms m->m_pkthdr.PH_vt.vt_nrecs <= 3264189592Sbms IGMP_V3_REPORT_MAXRECS) && 3265189592Sbms (mt->m_pkthdr.len + recslen <= 3266189592Sbms (inm->inm_ifp->if_mtu - IGMP_LEADINGSPACE))) 3267189592Sbms domerge = 1; 3268189592Sbms } 3269189592Sbms 3270189592Sbms if (!domerge && _IF_QFULL(gq)) { 3271189592Sbms CTR2(KTR_IGMPV3, 3272189592Sbms "%s: outbound queue full, skipping whole packet %p", 3273189592Sbms __func__, m); 3274189592Sbms mt = m->m_nextpkt; 3275189592Sbms if (!docopy) 3276189592Sbms m_freem(m); 3277189592Sbms m = mt; 3278189592Sbms continue; 3279189592Sbms } 3280189592Sbms 3281189592Sbms if (!docopy) { 3282189592Sbms CTR2(KTR_IGMPV3, "%s: dequeueing %p", __func__, m); 3283189592Sbms _IF_DEQUEUE(gq, m0); 3284189592Sbms m = m0->m_nextpkt; 3285189592Sbms } else { 3286189592Sbms CTR2(KTR_IGMPV3, "%s: copying %p", __func__, m); 3287189592Sbms m0 = m_dup(m, M_NOWAIT); 3288189592Sbms if (m0 == NULL) 3289189592Sbms return (ENOMEM); 3290189592Sbms m0->m_nextpkt = NULL; 3291189592Sbms m = m->m_nextpkt; 3292189592Sbms } 3293189592Sbms 3294189592Sbms if (!domerge) { 3295189592Sbms CTR3(KTR_IGMPV3, "%s: queueing %p to ifscq %p)", 3296189592Sbms __func__, m0, ifscq); 3297189592Sbms _IF_ENQUEUE(ifscq, m0); 3298189592Sbms } else { 3299189592Sbms struct mbuf *mtl; /* last mbuf of packet mt */ 3300189592Sbms 3301189592Sbms CTR3(KTR_IGMPV3, "%s: merging %p with ifscq tail %p)", 3302189592Sbms __func__, m0, mt); 3303189592Sbms 3304189592Sbms mtl = m_last(mt); 3305189592Sbms m0->m_flags &= ~M_PKTHDR; 3306189592Sbms mt->m_pkthdr.len += recslen; 3307189592Sbms mt->m_pkthdr.PH_vt.vt_nrecs += 3308189592Sbms m0->m_pkthdr.PH_vt.vt_nrecs; 3309189592Sbms 3310189592Sbms mtl->m_next = m0; 3311189592Sbms } 3312189592Sbms } 3313189592Sbms 3314189592Sbms return (0); 3315189592Sbms} 3316189592Sbms 3317189592Sbms/* 3318189592Sbms * Respond to a pending IGMPv3 General Query. 3319189592Sbms */ 3320189592Sbmsstatic void 3321189592Sbmsigmp_v3_dispatch_general_query(struct igmp_ifinfo *igi) 3322189592Sbms{ 3323189592Sbms struct ifmultiaddr *ifma, *tifma; 3324189592Sbms struct ifnet *ifp; 3325189592Sbms struct in_multi *inm; 3326189592Sbms int retval, loop; 3327189592Sbms 3328189592Sbms IN_MULTI_LOCK_ASSERT(); 3329189592Sbms IGMP_LOCK_ASSERT(); 3330189592Sbms 3331189592Sbms KASSERT(igi->igi_version == IGMP_VERSION_3, 3332189592Sbms ("%s: called when version %d", __func__, igi->igi_version)); 3333189592Sbms 3334189592Sbms ifp = igi->igi_ifp; 3335189592Sbms 3336189592Sbms IF_ADDR_LOCK(ifp); 3337189592Sbms TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, tifma) { 3338189931Sbms if (ifma->ifma_addr->sa_family != AF_INET || 3339189931Sbms ifma->ifma_protospec == NULL) 3340189592Sbms continue; 3341189592Sbms 3342189592Sbms inm = (struct in_multi *)ifma->ifma_protospec; 3343189592Sbms KASSERT(ifp == inm->inm_ifp, 3344189592Sbms ("%s: inconsistent ifp", __func__)); 3345189592Sbms 3346189592Sbms switch (inm->inm_state) { 3347189592Sbms case IGMP_NOT_MEMBER: 3348189592Sbms case IGMP_SILENT_MEMBER: 3349189592Sbms break; 3350189592Sbms case IGMP_REPORTING_MEMBER: 3351189592Sbms case IGMP_IDLE_MEMBER: 3352189592Sbms case IGMP_LAZY_MEMBER: 3353189592Sbms case IGMP_SLEEPING_MEMBER: 3354189592Sbms case IGMP_AWAKENING_MEMBER: 3355189592Sbms inm->inm_state = IGMP_REPORTING_MEMBER; 3356189592Sbms retval = igmp_v3_enqueue_group_record(&igi->igi_gq, 3357189592Sbms inm, 0, 0, 0); 3358189592Sbms CTR2(KTR_IGMPV3, "%s: enqueue record = %d", 3359189592Sbms __func__, retval); 3360189592Sbms break; 3361189592Sbms case IGMP_G_QUERY_PENDING_MEMBER: 3362189592Sbms case IGMP_SG_QUERY_PENDING_MEMBER: 3363189592Sbms case IGMP_LEAVING_MEMBER: 3364189592Sbms break; 3365189592Sbms } 3366189592Sbms } 3367189592Sbms IF_ADDR_UNLOCK(ifp); 3368189592Sbms 3369189592Sbms loop = (igi->igi_flags & IGIF_LOOPBACK) ? 1 : 0; 3370189592Sbms igmp_dispatch_queue(&igi->igi_gq, IGMP_MAX_RESPONSE_BURST, loop); 3371189592Sbms 3372189592Sbms /* 3373189592Sbms * Slew transmission of bursts over 500ms intervals. 3374189592Sbms */ 3375189592Sbms if (igi->igi_gq.ifq_head != NULL) { 3376189592Sbms igi->igi_v3_timer = 1 + IGMP_RANDOM_DELAY( 3377189592Sbms IGMP_RESPONSE_BURST_INTERVAL); 3378189592Sbms V_interface_timers_running = 1; 3379189592Sbms } 3380189592Sbms} 3381189592Sbms 3382189592Sbms/* 3383189592Sbms * Transmit the next pending IGMP message in the output queue. 3384189592Sbms * 3385189592Sbms * We get called from netisr_processqueue(). A mutex private to igmpoq 3386189592Sbms * will be acquired and released around this routine. 3387189592Sbms * 3388189592Sbms * VIMAGE: Needs to store/restore vnet pointer on a per-mbuf-chain basis. 3389189592Sbms * MRT: Nothing needs to be done, as IGMP traffic is always local to 3390189592Sbms * a link and uses a link-scope multicast address. 3391189592Sbms */ 3392189592Sbmsstatic void 3393189592Sbmsigmp_intr(struct mbuf *m) 3394189592Sbms{ 3395189592Sbms struct ip_moptions imo; 3396189592Sbms struct ifnet *ifp; 3397189592Sbms struct mbuf *ipopts, *m0; 3398189592Sbms int error; 3399189592Sbms uint32_t ifindex; 3400189592Sbms 3401189592Sbms CTR2(KTR_IGMPV3, "%s: transmit %p", __func__, m); 3402189592Sbms 3403189592Sbms /* 3404191548Szec * Set VNET image pointer from enqueued mbuf chain 3405189592Sbms * before doing anything else. Whilst we use interface 3406189592Sbms * indexes to guard against interface detach, they are 3407189592Sbms * unique to each VIMAGE and must be retrieved. 3408189592Sbms */ 3409191816Szec CURVNET_SET((struct vnet *)(m->m_pkthdr.header)); 3410189592Sbms ifindex = igmp_restore_context(m); 3411189592Sbms 3412189592Sbms /* 3413189592Sbms * Check if the ifnet still exists. This limits the scope of 3414189592Sbms * any race in the absence of a global ifp lock for low cost 3415189592Sbms * (an array lookup). 3416189592Sbms */ 3417189592Sbms ifp = ifnet_byindex(ifindex); 3418189592Sbms if (ifp == NULL) { 3419189592Sbms CTR3(KTR_IGMPV3, "%s: dropped %p as ifindex %u went away.", 3420189592Sbms __func__, m, ifindex); 3421189592Sbms m_freem(m); 3422190951Srwatson IPSTAT_INC(ips_noroute); 3423189592Sbms goto out; 3424189592Sbms } 3425189592Sbms 3426189592Sbms ipopts = V_igmp_sendra ? m_raopt : NULL; 3427189592Sbms 3428119181Srwatson imo.imo_multicast_ttl = 1; 342915292Swollman imo.imo_multicast_vif = -1; 3430181803Sbz imo.imo_multicast_loop = (V_ip_mrouter != NULL); 34311541Srgrimes 343215292Swollman /* 3433189592Sbms * If the user requested that IGMP traffic be explicitly 3434189592Sbms * redirected to the loopback interface (e.g. they are running a 3435189592Sbms * MANET interface and the routing protocol needs to see the 3436189592Sbms * updates), handle this now. 343715292Swollman */ 3438189592Sbms if (m->m_flags & M_IGMP_LOOP) 3439189592Sbms imo.imo_multicast_ifp = V_loif; 3440189592Sbms else 3441189592Sbms imo.imo_multicast_ifp = ifp; 34422531Swollman 3443189592Sbms if (m->m_flags & M_IGMPV2) { 3444189592Sbms m0 = m; 3445189592Sbms } else { 3446189592Sbms m0 = igmp_v3_encap_report(ifp, m); 3447189592Sbms if (m0 == NULL) { 3448189592Sbms CTR2(KTR_IGMPV3, "%s: dropped %p", __func__, m); 3449189592Sbms m_freem(m); 3450190951Srwatson IPSTAT_INC(ips_odropped); 3451189592Sbms goto out; 3452189592Sbms } 3453189592Sbms } 3454189592Sbms 3455189592Sbms igmp_scrub_context(m0); 3456189592Sbms m->m_flags &= ~(M_PROTOFLAGS); 3457189592Sbms m0->m_pkthdr.rcvif = V_loif; 3458189592Sbms#ifdef MAC 3459189592Sbms mac_netinet_igmp_send(ifp, m0); 3460189592Sbms#endif 3461189592Sbms error = ip_output(m0, ipopts, NULL, 0, &imo, NULL); 3462189592Sbms if (error) { 3463189592Sbms CTR3(KTR_IGMPV3, "%s: ip_output(%p) = %d", __func__, m0, error); 3464189592Sbms goto out; 3465189592Sbms } 3466189592Sbms 3467190965Srwatson IGMPSTAT_INC(igps_snd_reports); 3468189592Sbms 3469189592Sbmsout: 3470189592Sbms /* 3471189592Sbms * We must restore the existing vnet pointer before 3472189592Sbms * continuing as we are run from netisr context. 3473189592Sbms */ 3474189592Sbms CURVNET_RESTORE(); 34751541Srgrimes} 3476189592Sbms 3477189592Sbms/* 3478189592Sbms * Encapsulate an IGMPv3 report. 3479189592Sbms * 3480189592Sbms * The internal mbuf flag M_IGMPV3_HDR is used to indicate that the mbuf 3481189592Sbms * chain has already had its IP/IGMPv3 header prepended. In this case 3482189592Sbms * the function will not attempt to prepend; the lengths and checksums 3483189592Sbms * will however be re-computed. 3484189592Sbms * 3485189592Sbms * Returns a pointer to the new mbuf chain head, or NULL if the 3486189592Sbms * allocation failed. 3487189592Sbms */ 3488189592Sbmsstatic struct mbuf * 3489189592Sbmsigmp_v3_encap_report(struct ifnet *ifp, struct mbuf *m) 3490189592Sbms{ 3491189592Sbms struct igmp_report *igmp; 3492189592Sbms struct ip *ip; 3493189592Sbms int hdrlen, igmpreclen; 3494189592Sbms 3495189592Sbms KASSERT((m->m_flags & M_PKTHDR), 3496189592Sbms ("%s: mbuf chain %p is !M_PKTHDR", __func__, m)); 3497189592Sbms 3498189592Sbms igmpreclen = m_length(m, NULL); 3499189592Sbms hdrlen = sizeof(struct ip) + sizeof(struct igmp_report); 3500189592Sbms 3501189592Sbms if (m->m_flags & M_IGMPV3_HDR) { 3502189592Sbms igmpreclen -= hdrlen; 3503189592Sbms } else { 3504189592Sbms M_PREPEND(m, hdrlen, M_DONTWAIT); 3505189592Sbms if (m == NULL) 3506189592Sbms return (NULL); 3507189592Sbms m->m_flags |= M_IGMPV3_HDR; 3508189592Sbms } 3509189592Sbms 3510189592Sbms CTR2(KTR_IGMPV3, "%s: igmpreclen is %d", __func__, igmpreclen); 3511189592Sbms 3512189592Sbms m->m_data += sizeof(struct ip); 3513189592Sbms m->m_len -= sizeof(struct ip); 3514189592Sbms 3515189592Sbms igmp = mtod(m, struct igmp_report *); 3516189592Sbms igmp->ir_type = IGMP_v3_HOST_MEMBERSHIP_REPORT; 3517189592Sbms igmp->ir_rsv1 = 0; 3518189592Sbms igmp->ir_rsv2 = 0; 3519189592Sbms igmp->ir_numgrps = htons(m->m_pkthdr.PH_vt.vt_nrecs); 3520189592Sbms igmp->ir_cksum = 0; 3521189592Sbms igmp->ir_cksum = in_cksum(m, sizeof(struct igmp_report) + igmpreclen); 3522189592Sbms m->m_pkthdr.PH_vt.vt_nrecs = 0; 3523189592Sbms 3524189592Sbms m->m_data -= sizeof(struct ip); 3525189592Sbms m->m_len += sizeof(struct ip); 3526189592Sbms 3527189592Sbms ip = mtod(m, struct ip *); 3528189592Sbms ip->ip_tos = IPTOS_PREC_INTERNETCONTROL; 3529189592Sbms ip->ip_len = hdrlen + igmpreclen; 3530189592Sbms ip->ip_off = IP_DF; 3531189592Sbms ip->ip_p = IPPROTO_IGMP; 3532189592Sbms ip->ip_sum = 0; 3533189592Sbms 3534189592Sbms ip->ip_src.s_addr = INADDR_ANY; 3535189592Sbms 3536189592Sbms if (m->m_flags & M_IGMP_LOOP) { 3537189592Sbms struct in_ifaddr *ia; 3538189592Sbms 3539189592Sbms IFP_TO_IA(ifp, ia); 3540194760Srwatson if (ia != NULL) { 3541189592Sbms ip->ip_src = ia->ia_addr.sin_addr; 3542194760Srwatson ifa_free(&ia->ia_ifa); 3543194760Srwatson } 3544189592Sbms } 3545189592Sbms 3546189592Sbms ip->ip_dst.s_addr = htonl(INADDR_ALLRPTS_GROUP); 3547189592Sbms 3548189592Sbms return (m); 3549189592Sbms} 3550189592Sbms 3551189592Sbms#ifdef KTR 3552189592Sbmsstatic char * 3553189592Sbmsigmp_rec_type_to_str(const int type) 3554189592Sbms{ 3555189592Sbms 3556189592Sbms switch (type) { 3557189592Sbms case IGMP_CHANGE_TO_EXCLUDE_MODE: 3558189592Sbms return "TO_EX"; 3559189592Sbms break; 3560189592Sbms case IGMP_CHANGE_TO_INCLUDE_MODE: 3561189592Sbms return "TO_IN"; 3562189592Sbms break; 3563189592Sbms case IGMP_MODE_IS_EXCLUDE: 3564189592Sbms return "MODE_EX"; 3565189592Sbms break; 3566189592Sbms case IGMP_MODE_IS_INCLUDE: 3567189592Sbms return "MODE_IN"; 3568189592Sbms break; 3569189592Sbms case IGMP_ALLOW_NEW_SOURCES: 3570189592Sbms return "ALLOW_NEW"; 3571189592Sbms break; 3572189592Sbms case IGMP_BLOCK_OLD_SOURCES: 3573189592Sbms return "BLOCK_OLD"; 3574189592Sbms break; 3575189592Sbms default: 3576189592Sbms break; 3577189592Sbms } 3578189592Sbms return "unknown"; 3579189592Sbms} 3580189592Sbms#endif 3581189592Sbms 3582189592Sbmsstatic void 3583195837Srwatsonigmp_init(void *unused __unused) 3584189592Sbms{ 3585189592Sbms 3586189592Sbms CTR1(KTR_IGMPV3, "%s: initializing", __func__); 3587189592Sbms 3588189592Sbms IGMP_LOCK_INIT(); 3589189592Sbms 3590189592Sbms m_raopt = igmp_ra_alloc(); 3591189592Sbms 3592193219Srwatson netisr_register(&igmp_nh); 3593189592Sbms} 3594195837SrwatsonSYSINIT(igmp_init, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, igmp_init, NULL); 3595189592Sbms 3596189592Sbmsstatic void 3597195837Srwatsonigmp_uninit(void *unused __unused) 3598189592Sbms{ 3599189592Sbms 3600189592Sbms CTR1(KTR_IGMPV3, "%s: tearing down", __func__); 3601189592Sbms 3602193219Srwatson netisr_unregister(&igmp_nh); 3603189592Sbms 3604189592Sbms m_free(m_raopt); 3605189592Sbms m_raopt = NULL; 3606189592Sbms 3607189592Sbms IGMP_LOCK_DESTROY(); 3608189592Sbms} 3609195837SrwatsonSYSUNINIT(igmp_uninit, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, igmp_uninit, NULL); 3610189592Sbms 3611195837Srwatsonstatic void 3612195837Srwatsonvnet_igmp_init(const void *unused __unused) 3613189592Sbms{ 3614189592Sbms 3615189592Sbms CTR1(KTR_IGMPV3, "%s: initializing", __func__); 3616189592Sbms 3617189592Sbms LIST_INIT(&V_igi_head); 3618189592Sbms} 3619195837SrwatsonVNET_SYSINIT(vnet_igmp_init, SI_SUB_PSEUDO, SI_ORDER_ANY, vnet_igmp_init, 3620195837Srwatson NULL); 3621189592Sbms 3622195837Srwatsonstatic void 3623195837Srwatsonvnet_igmp_uninit(const void *unused __unused) 3624189592Sbms{ 3625189592Sbms 3626189592Sbms CTR1(KTR_IGMPV3, "%s: tearing down", __func__); 3627189592Sbms 3628189592Sbms KASSERT(LIST_EMPTY(&V_igi_head), 3629189592Sbms ("%s: igi list not empty; ifnets not detached?", __func__)); 3630189592Sbms} 3631195837SrwatsonVNET_SYSUNINIT(vnet_igmp_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY, 3632195837Srwatson vnet_igmp_uninit, NULL); 3633189592Sbms 3634189592Sbmsstatic int 3635189592Sbmsigmp_modevent(module_t mod, int type, void *unused __unused) 3636189592Sbms{ 3637189592Sbms 3638189592Sbms switch (type) { 3639189592Sbms case MOD_LOAD: 3640189592Sbms case MOD_UNLOAD: 3641189592Sbms break; 3642189592Sbms default: 3643189592Sbms return (EOPNOTSUPP); 3644189592Sbms } 3645189592Sbms return (0); 3646189592Sbms} 3647189592Sbms 3648189592Sbmsstatic moduledata_t igmp_mod = { 3649189592Sbms "igmp", 3650189592Sbms igmp_modevent, 3651189592Sbms 0 3652189592Sbms}; 3653189592SbmsDECLARE_MODULE(igmp, igmp_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 3654