1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2006-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #ifndef _NETINET_SCTP_OS_BSD_H_ 36 #define _NETINET_SCTP_OS_BSD_H_ 37 38 #include <sys/cdefs.h> 39 #include "opt_inet6.h" 40 #include "opt_inet.h" 41 #include "opt_sctp.h" 42 43 #include <sys/param.h> 44 #include <sys/domain.h> 45 #include <sys/eventhandler.h> 46 #include <sys/ktr.h> 47 #include <sys/systm.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/kernel.h> 51 #include <sys/sysctl.h> 52 #include <sys/mbuf.h> 53 #include <sys/protosw.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/jail.h> 57 #include <sys/sysctl.h> 58 #include <sys/resourcevar.h> 59 #include <sys/uio.h> 60 #include <sys/lock.h> 61 #include <sys/rwlock.h> 62 #include <sys/kthread.h> 63 #include <sys/priv.h> 64 #include <sys/random.h> 65 #include <sys/limits.h> 66 #include <sys/queue.h> 67 #include <machine/cpu.h> 68 69 #include <net/if.h> 70 #include <net/if_types.h> 71 #include <net/if_var.h> 72 #include <net/if_private.h> 73 #include <net/route.h> 74 #include <net/route/nhop.h> 75 #include <net/vnet.h> 76 77 #include <netinet/in.h> 78 #include <netinet/in_systm.h> 79 #include <netinet/ip.h> 80 #include <netinet/in_fib.h> 81 #include <netinet/in_pcb.h> 82 #include <netinet/in_var.h> 83 #include <netinet/ip_var.h> 84 #include <netinet/ip_icmp.h> 85 #include <netinet/icmp_var.h> 86 87 #ifdef INET6 88 #include <netinet/ip6.h> 89 #include <netinet6/in6_fib.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/in6_pcb.h> 92 #include <netinet6/nd6.h> 93 #include <netinet6/scope6_var.h> 94 #endif /* INET6 */ 95 96 #include <netinet/ip_options.h> 97 98 #include <crypto/sha1.h> 99 #include <crypto/sha2/sha256.h> 100 101 /* Declare all the malloc names for all the various mallocs */ 102 MALLOC_DECLARE(SCTP_M_MAP); 103 MALLOC_DECLARE(SCTP_M_STRMI); 104 MALLOC_DECLARE(SCTP_M_STRMO); 105 MALLOC_DECLARE(SCTP_M_ASC_ADDR); 106 MALLOC_DECLARE(SCTP_M_ASC_IT); 107 MALLOC_DECLARE(SCTP_M_AUTH_CL); 108 MALLOC_DECLARE(SCTP_M_AUTH_KY); 109 MALLOC_DECLARE(SCTP_M_AUTH_HL); 110 MALLOC_DECLARE(SCTP_M_AUTH_IF); 111 MALLOC_DECLARE(SCTP_M_STRESET); 112 MALLOC_DECLARE(SCTP_M_CMSG); 113 MALLOC_DECLARE(SCTP_M_COPYAL); 114 MALLOC_DECLARE(SCTP_M_VRF); 115 MALLOC_DECLARE(SCTP_M_IFA); 116 MALLOC_DECLARE(SCTP_M_IFN); 117 MALLOC_DECLARE(SCTP_M_TIMW); 118 MALLOC_DECLARE(SCTP_M_MVRF); 119 MALLOC_DECLARE(SCTP_M_ITER); 120 MALLOC_DECLARE(SCTP_M_SOCKOPT); 121 MALLOC_DECLARE(SCTP_M_MCORE); 122 123 #if defined(SCTP_LOCAL_TRACE_BUF) 124 125 #define SCTP_GET_CYCLECOUNT get_cyclecount() 126 #define SCTP_CTR6 sctp_log_trace 127 128 #else 129 #define SCTP_CTR6 CTR6 130 #endif 131 132 /* 133 * Macros to expand out globals defined by various modules 134 * to either a real global or a virtualized instance of one, 135 * depending on whether VIMAGE is defined. 136 */ 137 /* then define the macro(s) that hook into the vimage macros */ 138 #define MODULE_GLOBAL(__SYMBOL) V_##__SYMBOL 139 140 #define V_system_base_info VNET(system_base_info) 141 #define SCTP_BASE_INFO(__m) V_system_base_info.sctppcbinfo.__m 142 #define SCTP_BASE_STATS V_system_base_info.sctpstat 143 #define SCTP_BASE_STAT(__m) V_system_base_info.sctpstat.__m 144 #define SCTP_BASE_SYSCTL(__m) V_system_base_info.sctpsysctl.__m 145 #define SCTP_BASE_VAR(__m) V_system_base_info.__m 146 147 #define SCTP_PRINTF(params...) printf(params) 148 #if defined(SCTP_DEBUG) 149 #define SCTPDBG(level, params...) \ 150 { \ 151 do { \ 152 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \ 153 SCTP_PRINTF(params); \ 154 } \ 155 } while (0); \ 156 } 157 #define SCTPDBG_ADDR(level, addr) \ 158 { \ 159 do { \ 160 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \ 161 sctp_print_address(addr); \ 162 } \ 163 } while (0); \ 164 } 165 #else 166 #define SCTPDBG(level, params...) 167 #define SCTPDBG_ADDR(level, addr) 168 #endif 169 170 #ifdef SCTP_LTRACE_CHUNKS 171 #define SCTP_LTRACE_CHK(a, b, c, d) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_CHUNK_ENABLE) SCTP_CTR6(KTR_SUBSYS, "SCTP:%d[%d]:%x-%x-%x-%x", SCTP_LOG_CHUNK_PROC, 0, a, b, c, d) 172 #else 173 #define SCTP_LTRACE_CHK(a, b, c, d) 174 #endif 175 176 #ifdef SCTP_LTRACE_ERRORS 177 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) \ 178 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \ 179 SCTP_PRINTF("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \ 180 m, inp, stcb, net, file, __LINE__, err); 181 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) \ 182 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \ 183 SCTP_PRINTF("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \ 184 inp, stcb, net, file, __LINE__, err); 185 #else 186 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) 187 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) 188 #endif 189 190 /* 191 * Local address and interface list handling 192 */ 193 #define SCTP_MAX_VRF_ID 0 194 #define SCTP_SIZE_OF_VRF_HASH 3 195 #define SCTP_IFNAMSIZ IFNAMSIZ 196 #define SCTP_DEFAULT_VRFID 0 197 #define SCTP_VRF_ADDR_HASH_SIZE 16 198 #define SCTP_VRF_IFN_HASH_SIZE 3 199 #define SCTP_INIT_VRF_TABLEID(vrf) 200 201 #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP) 202 #define SCTP_ROUTE_IS_REAL_LOOP(ro) ((ro)->ro_nh && (ro)->ro_nh->nh_ifa && (ro)->ro_nh->nh_ifa->ifa_ifp && (ro)->ro_nh->nh_ifa->ifa_ifp->if_type == IFT_LOOP) 203 204 /* 205 * Access to IFN's to help with src-addr-selection 206 */ 207 /* This could return VOID if the index works but for BSD we provide both. */ 208 #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_nh->nh_ifp 209 #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_nh->nh_ifp->if_index 210 #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_nh && (ro)->ro_nh->nh_ifp) 211 212 /* 213 * general memory allocation 214 */ 215 #define SCTP_MALLOC(var, type, size, name) \ 216 do { \ 217 var = (type)malloc(size, name, M_NOWAIT); \ 218 } while (0) 219 220 #define SCTP_FREE(var, type) free(var, type) 221 222 #define SCTP_MALLOC_SONAME(var, type, size) \ 223 do { \ 224 var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \ 225 } while (0) 226 227 #define SCTP_FREE_SONAME(var) free(var, M_SONAME) 228 229 #define SCTP_PROCESS_STRUCT struct proc * 230 231 /* 232 * zone allocation functions 233 */ 234 #include <vm/uma.h> 235 236 /* SCTP_ZONE_INIT: initialize the zone */ 237 typedef struct uma_zone *sctp_zone_t; 238 #define SCTP_ZONE_INIT(zone, name, size, number) { \ 239 zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\ 240 0); \ 241 uma_zone_set_max(zone, number); \ 242 } 243 244 #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone) 245 246 /* SCTP_ZONE_GET: allocate element from the zone */ 247 #define SCTP_ZONE_GET(zone, type) \ 248 (type *)uma_zalloc(zone, M_NOWAIT); 249 250 /* SCTP_ZONE_FREE: free element from the zone */ 251 #define SCTP_ZONE_FREE(zone, element) \ 252 uma_zfree(zone, element); 253 254 #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT) 255 #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark) 256 257 #define SCTP_M_COPYM m_copym 258 259 /* 260 * timers 261 */ 262 #include <sys/callout.h> 263 typedef struct callout sctp_os_timer_t; 264 265 #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1) 266 /* 267 * NOTE: The next two shouldn't be called directly outside of sctp_timer_start() 268 * and sctp_timer_stop(), since they don't handle incrementing/decrementing 269 * relevant reference counts. 270 */ 271 #define SCTP_OS_TIMER_START callout_reset 272 #define SCTP_OS_TIMER_STOP callout_stop 273 #define SCTP_OS_TIMER_STOP_DRAIN callout_drain 274 #define SCTP_OS_TIMER_PENDING callout_pending 275 #define SCTP_OS_TIMER_ACTIVE callout_active 276 #define SCTP_OS_TIMER_DEACTIVATE callout_deactivate 277 278 #define sctp_get_tick_count() (ticks) 279 280 #define SCTP_UNUSED __attribute__((unused)) 281 282 /* 283 * Functions 284 */ 285 /* Mbuf manipulation and access macros */ 286 #define SCTP_BUF_LEN(m) (m->m_len) 287 #define SCTP_BUF_NEXT(m) (m->m_next) 288 #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt) 289 #define SCTP_BUF_RESV_UF(m, size) m->m_data += size 290 #define SCTP_BUF_AT(m, size) m->m_data + size 291 #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT) 292 #define SCTP_BUF_SIZE M_SIZE 293 #define SCTP_BUF_TYPE(m) (m->m_type) 294 #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif) 295 #define SCTP_BUF_PREPEND M_PREPEND 296 297 #define SCTP_ALIGN_TO_END(m, len) M_ALIGN(m, len) 298 299 #define SCTP_SNPRINTF(...) snprintf(__VA_ARGS__) 300 301 /* We make it so if you have up to 4 threads 302 * writing based on the default size of 303 * the packet log 65 k, that would be 304 * 4 16k packets before we would hit 305 * a problem. 306 */ 307 #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3 308 309 /*************************/ 310 /* MTU */ 311 /*************************/ 312 #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index) ((ifn != NULL) ? ((struct ifnet *)ifn)->if_mtu : 0) 313 #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, nh) ((uint32_t)((nh != NULL) ? nh->nh_mtu : 0)) 314 315 /*************************/ 316 /* These are for logging */ 317 /*************************/ 318 /* return the base ext data pointer */ 319 #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf) 320 /* return the refcnt of the data pointer */ 321 #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ext_cnt) 322 /* return any buffer related flags, this is 323 * used beyond logging for apple only. 324 */ 325 #define SCTP_BUF_GET_FLAGS(m) (m->m_flags) 326 327 /* For BSD this just accesses the M_PKTHDR length 328 * so it operates on an mbuf with hdr flag. Other 329 * O/S's may have separate packet header and mbuf 330 * chain pointers.. thus the macro. 331 */ 332 #define SCTP_HEADER_TO_CHAIN(m) (m) 333 #define SCTP_DETACH_HEADER_FROM_CHAIN(m) 334 #define SCTP_HEADER_LEN(m) ((m)->m_pkthdr.len) 335 #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0 336 #define SCTP_RELEASE_HEADER(m) 337 #define SCTP_RELEASE_PKT(m) sctp_m_freem(m) 338 #define SCTP_ENABLE_UDP_CSUM(m) do { \ 339 m->m_pkthdr.csum_flags = CSUM_UDP; \ 340 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \ 341 } while (0) 342 343 #define SCTP_GET_PKT_VRFID(m, vrf_id) ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID) 344 345 /* Attach the chain of data into the sendable packet. */ 346 #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \ 347 pak = m; \ 348 pak->m_pkthdr.len = packet_length; \ 349 } while(0) 350 351 /* Other m_pkthdr type things */ 352 #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0) 353 #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP))) 354 355 /* This converts any input packet header 356 * into the chain of data holders, for BSD 357 * its a NOP. 358 */ 359 360 /* get the v6 hop limit */ 361 #define SCTP_GET_HLIM(inp, ro) in6_selecthlim(&inp->ip_inp.inp, (ro ? (ro->ro_nh ? (ro->ro_nh->nh_ifp) : (NULL)) : (NULL))); 362 363 /* is the endpoint v6only? */ 364 #define SCTP_IPV6_V6ONLY(sctp_inpcb) ((sctp_inpcb)->ip_inp.inp.inp_flags & IN6P_IPV6_V6ONLY) 365 /* is the socket non-blocking? */ 366 #define SCTP_SO_IS_NBIO(so) ((so)->so_state & SS_NBIO) 367 #define SCTP_SET_SO_NBIO(so) ((so)->so_state |= SS_NBIO) 368 #define SCTP_CLEAR_SO_NBIO(so) ((so)->so_state &= ~SS_NBIO) 369 /* get the socket type */ 370 #define SCTP_SO_TYPE(so) ((so)->so_type) 371 /* reserve sb space for a socket */ 372 #define SCTP_SORESERVE(so, send, recv) soreserve(so, send, recv) 373 /* wakeup a socket */ 374 #define SCTP_SOWAKEUP(so) wakeup(&(so)->so_timeo) 375 /* number of bytes ready to read */ 376 #define SCTP_SBAVAIL(sb) sbavail(sb) 377 /* clear the socket buffer state */ 378 #define SCTP_SB_INCR(sb, incr) \ 379 { \ 380 atomic_add_int(&(sb)->sb_acc, incr); \ 381 atomic_add_int(&(sb)->sb_ccc, incr); \ 382 } 383 #define SCTP_SB_DECR(sb, decr) \ 384 { \ 385 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_acc, decr); \ 386 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_ccc, decr); \ 387 } 388 #define SCTP_SB_CLEAR(sb) \ 389 (sb).sb_acc = 0; \ 390 (sb).sb_ccc = 0; \ 391 (sb).sb_mb = NULL; \ 392 (sb).sb_mbcnt = 0; 393 394 #define SCTP_SB_LIMIT_RCV(so) (SOLISTENING(so) ? so->sol_sbrcv_hiwat : so->so_rcv.sb_hiwat) 395 #define SCTP_SB_LIMIT_SND(so) (SOLISTENING(so) ? so->sol_sbsnd_hiwat : so->so_snd.sb_hiwat) 396 397 /* 398 * routes, output, etc. 399 */ 400 typedef struct route sctp_route_t; 401 402 #define SCTP_RTALLOC(ro, vrf_id, fibnum) \ 403 { \ 404 if ((ro)->ro_nh == NULL) { \ 405 (ro)->ro_nh = rib_lookup(fibnum, &(ro)->ro_dst, NHR_REF, 0); \ 406 } \ 407 } 408 409 /* 410 * SCTP protocol specific mbuf flags. 411 */ 412 #define M_NOTIFICATION M_PROTO1 /* SCTP notification */ 413 414 /* 415 * IP output routines 416 */ 417 #define SCTP_IP_OUTPUT(result, o_pak, ro, _inp, vrf_id) \ 418 { \ 419 struct sctp_inpcb *local_inp = _inp; \ 420 int o_flgs = IP_RAWOUTPUT; \ 421 \ 422 m_clrprotoflags(o_pak); \ 423 if ((local_inp != NULL) && (local_inp->sctp_socket != NULL)) { \ 424 o_flgs |= local_inp->sctp_socket->so_options & SO_DONTROUTE; \ 425 } \ 426 result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \ 427 } 428 429 #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, _inp, vrf_id) \ 430 { \ 431 struct sctp_inpcb *local_inp = _inp; \ 432 \ 433 m_clrprotoflags(o_pak); \ 434 if (local_inp != NULL) { \ 435 INP_RLOCK(&local_inp->ip_inp.inp); \ 436 result = ip6_output(o_pak, \ 437 local_inp->ip_inp.inp.in6p_outputopts, \ 438 (ro), 0, 0, ifp, NULL); \ 439 INP_RUNLOCK(&local_inp->ip_inp.inp); \ 440 } else { \ 441 result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL); \ 442 } \ 443 } 444 445 struct mbuf * 446 sctp_get_mbuf_for_msg(unsigned int space_needed, 447 int want_header, int how, int allonebuf, int type); 448 449 /* 450 * SCTP AUTH 451 */ 452 #define SCTP_READ_RANDOM(buf, len) arc4rand(buf, len, 0) 453 454 /* map standard crypto API names */ 455 #define SCTP_SHA1_CTX SHA1_CTX 456 #define SCTP_SHA1_INIT SHA1Init 457 #define SCTP_SHA1_UPDATE SHA1Update 458 #define SCTP_SHA1_FINAL(x,y) SHA1Final((caddr_t)x, y) 459 460 #define SCTP_SHA256_CTX SHA256_CTX 461 #define SCTP_SHA256_INIT SHA256_Init 462 #define SCTP_SHA256_UPDATE SHA256_Update 463 #define SCTP_SHA256_FINAL(x,y) SHA256_Final((caddr_t)x, y) 464 465 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1) 466 #if defined(INVARIANTS) 467 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \ 468 { \ 469 int32_t oldval; \ 470 oldval = atomic_fetchadd_int(addr, -val); \ 471 if (oldval < val) { \ 472 panic("Counter goes negative"); \ 473 } \ 474 } 475 #else 476 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \ 477 { \ 478 int32_t oldval; \ 479 oldval = atomic_fetchadd_int(addr, -val); \ 480 if (oldval < val) { \ 481 *addr = 0; \ 482 } \ 483 } 484 #endif 485 486 #define SCTP_IS_LISTENING(inp) ((inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) != 0) 487 488 int sctp_syscalls_init(void); 489 int sctp_syscalls_uninit(void); 490 491 #endif 492