Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet/tcp_usrreq.c
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1 /* $NetBSD: tcp_usrreq.c,v 1.238 2022/11/04 09:01:53 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1997, 1998, 2005, 2006 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Jason R. Thorpe and Kevin M. Lahey of the Numerical Aerospace Simulation 38 * Facility, NASA Ames Research Center. 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Charles M. Hannum. 41 * This code is derived from software contributed to The NetBSD Foundation 42 * by Rui Paulo. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 54 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 57 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 58 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 59 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 60 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 /* 67 * Copyright (c) 1982, 1986, 1988, 1993, 1995 68 * The Regents of the University of California. All rights reserved. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. Neither the name of the University nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 * 94 * @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95 95 */ 96 97 /* 98 * TCP protocol interface to socket abstraction. 99 */ 100 101 #include <sys/cdefs.h> 102 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.238 2022/11/04 09:01:53 ozaki-r Exp $"); 103 104 #ifdef _KERNEL_OPT 105 #include "opt_inet.h" 106 #include "opt_tcp_debug.h" 107 #include "opt_mbuftrace.h" 108 #include "opt_tcp_space.h" 109 #include "opt_net_mpsafe.h" 110 #endif 111 112 #include <sys/param.h> 113 #include <sys/systm.h> 114 #include <sys/kernel.h> 115 #include <sys/mbuf.h> 116 #include <sys/socket.h> 117 #include <sys/socketvar.h> 118 #include <sys/protosw.h> 119 #include <sys/errno.h> 120 #include <sys/stat.h> 121 #include <sys/proc.h> 122 #include <sys/domain.h> 123 #include <sys/sysctl.h> 124 #include <sys/kauth.h> 125 #include <sys/kernel.h> 126 #include <sys/uidinfo.h> 127 128 #include <net/if.h> 129 130 #include <netinet/in.h> 131 #include <netinet/in_systm.h> 132 #include <netinet/in_var.h> 133 #include <netinet/ip.h> 134 #include <netinet/in_pcb.h> 135 #include <netinet/ip_var.h> 136 #include <netinet/in_offload.h> 137 138 #ifdef INET6 139 #include <netinet/ip6.h> 140 #include <netinet6/in6_pcb.h> 141 #include <netinet6/ip6_var.h> 142 #include <netinet6/scope6_var.h> 143 #endif 144 145 #include <netinet/tcp.h> 146 #include <netinet/tcp_fsm.h> 147 #include <netinet/tcp_seq.h> 148 #include <netinet/tcp_timer.h> 149 #include <netinet/tcp_var.h> 150 #include <netinet/tcp_private.h> 151 #include <netinet/tcp_congctl.h> 152 #include <netinet/tcp_debug.h> 153 #include <netinet/tcp_vtw.h> 154 #include <netinet/tcp_syncache.h> 155 156 static int 157 tcp_debug_capture(struct tcpcb *tp, int req) 158 { 159 #ifdef TCP_DEBUG 160 return tp->t_state; 161 #endif 162 return 0; 163 } 164 165 static inline void 166 tcp_debug_trace(struct socket *so, struct tcpcb *tp, int ostate, int req) 167 { 168 #ifdef TCP_DEBUG 169 if (tp && (so->so_options & SO_DEBUG)) 170 tcp_trace(TA_USER, ostate, tp, NULL, req); 171 #endif 172 } 173 174 static void 175 change_keepalive(struct socket *so, struct tcpcb *tp) 176 { 177 tp->t_maxidle = tp->t_keepcnt * MIN(tp->t_keepintvl, 178 TCP_TIMER_MAXTICKS / tp->t_keepcnt); 179 TCP_TIMER_DISARM(tp, TCPT_KEEP); 180 TCP_TIMER_DISARM(tp, TCPT_2MSL); 181 182 if (tp->t_state == TCPS_SYN_RECEIVED || 183 tp->t_state == TCPS_SYN_SENT) { 184 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 185 } else if (so->so_options & SO_KEEPALIVE && 186 tp->t_state <= TCPS_CLOSE_WAIT) { 187 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 188 } else { 189 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 190 } 191 192 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 193 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 194 } 195 196 /* 197 * Export TCP internal state information via a struct tcp_info, based on the 198 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 199 * (TCP state machine, etc). We export all information using FreeBSD-native 200 * constants -- for example, the numeric values for tcpi_state will differ 201 * from Linux. 202 */ 203 static void 204 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 205 { 206 207 bzero(ti, sizeof(*ti)); 208 209 ti->tcpi_state = tp->t_state; 210 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 211 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 212 if (tp->t_flags & TF_SACK_PERMIT) 213 ti->tcpi_options |= TCPI_OPT_SACK; 214 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 215 ti->tcpi_options |= TCPI_OPT_WSCALE; 216 ti->tcpi_snd_wscale = tp->snd_scale; 217 ti->tcpi_rcv_wscale = tp->rcv_scale; 218 } 219 if (tp->t_flags & TF_ECN_PERMIT) { 220 ti->tcpi_options |= TCPI_OPT_ECN; 221 } 222 223 ti->tcpi_rto = tp->t_rxtcur * tick; 224 ti->tcpi_last_data_recv = (long)(getticks() - 225 (int)tp->t_rcvtime) * tick; 226 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick / PR_SLOWHZ) 227 >> (TCP_RTT_SHIFT + 2); 228 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick / PR_SLOWHZ) 229 >> (TCP_RTTVAR_SHIFT + 2); 230 231 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 232 /* Linux API wants these in # of segments, apparently */ 233 ti->tcpi_snd_cwnd = tp->snd_cwnd / tp->t_segsz; 234 ti->tcpi_snd_wnd = tp->snd_wnd / tp->t_segsz; 235 236 /* 237 * FreeBSD-specific extension fields for tcp_info. 238 */ 239 ti->tcpi_rcv_space = tp->rcv_wnd; 240 ti->tcpi_rcv_nxt = tp->rcv_nxt; 241 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 242 ti->tcpi_snd_nxt = tp->snd_nxt; 243 ti->tcpi_snd_mss = tp->t_segsz; 244 ti->tcpi_rcv_mss = tp->t_segsz; 245 #ifdef TF_TOE 246 if (tp->t_flags & TF_TOE) 247 ti->tcpi_options |= TCPI_OPT_TOE; 248 #endif 249 /* From the redundant department of redundancies... */ 250 ti->__tcpi_retransmits = ti->__tcpi_retrans = 251 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 252 253 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 254 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 255 } 256 257 int 258 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 259 { 260 int error = 0, s; 261 struct inpcb *inp; 262 struct tcpcb *tp; 263 struct tcp_info ti; 264 u_int ui; 265 int family; /* family of the socket */ 266 int level, optname, optval; 267 268 level = sopt->sopt_level; 269 optname = sopt->sopt_name; 270 271 family = so->so_proto->pr_domain->dom_family; 272 273 s = splsoftnet(); 274 inp = sotoinpcb(so); 275 if (inp == NULL) { 276 splx(s); 277 return ECONNRESET; 278 } 279 if (level != IPPROTO_TCP) { 280 switch (family) { 281 case PF_INET: 282 error = ip_ctloutput(op, so, sopt); 283 break; 284 #ifdef INET6 285 case PF_INET6: 286 error = ip6_ctloutput(op, so, sopt); 287 break; 288 #endif 289 } 290 splx(s); 291 return error; 292 } 293 tp = intotcpcb(inp); 294 295 switch (op) { 296 case PRCO_SETOPT: 297 switch (optname) { 298 #ifdef TCP_SIGNATURE 299 case TCP_MD5SIG: 300 error = sockopt_getint(sopt, &optval); 301 if (error) 302 break; 303 if (optval > 0) 304 tp->t_flags |= TF_SIGNATURE; 305 else 306 tp->t_flags &= ~TF_SIGNATURE; 307 break; 308 #endif /* TCP_SIGNATURE */ 309 310 case TCP_NODELAY: 311 error = sockopt_getint(sopt, &optval); 312 if (error) 313 break; 314 if (optval) 315 tp->t_flags |= TF_NODELAY; 316 else 317 tp->t_flags &= ~TF_NODELAY; 318 break; 319 320 case TCP_MAXSEG: 321 error = sockopt_getint(sopt, &optval); 322 if (error) 323 break; 324 if (optval > 0 && optval <= tp->t_peermss) 325 tp->t_peermss = optval; /* limit on send size */ 326 else 327 error = EINVAL; 328 break; 329 #ifdef notyet 330 case TCP_CONGCTL: 331 /* XXX string overflow XXX */ 332 error = tcp_congctl_select(tp, sopt->sopt_data); 333 break; 334 #endif 335 336 case TCP_KEEPIDLE: 337 error = sockopt_get(sopt, &ui, sizeof(ui)); 338 if (error) 339 break; 340 if (ui > 0 && ui <= TCP_TIMER_MAXTICKS) { 341 tp->t_keepidle = ui; 342 change_keepalive(so, tp); 343 } else 344 error = EINVAL; 345 break; 346 347 case TCP_KEEPINTVL: 348 error = sockopt_get(sopt, &ui, sizeof(ui)); 349 if (error) 350 break; 351 if (ui > 0 && ui <= TCP_TIMER_MAXTICKS) { 352 tp->t_keepintvl = ui; 353 change_keepalive(so, tp); 354 } else 355 error = EINVAL; 356 break; 357 358 case TCP_KEEPCNT: 359 error = sockopt_get(sopt, &ui, sizeof(ui)); 360 if (error) 361 break; 362 if (ui > 0 && ui <= TCP_TIMER_MAXTICKS) { 363 tp->t_keepcnt = ui; 364 change_keepalive(so, tp); 365 } else 366 error = EINVAL; 367 break; 368 369 case TCP_KEEPINIT: 370 error = sockopt_get(sopt, &ui, sizeof(ui)); 371 if (error) 372 break; 373 if (ui > 0 && ui <= TCP_TIMER_MAXTICKS) { 374 tp->t_keepinit = ui; 375 change_keepalive(so, tp); 376 } else 377 error = EINVAL; 378 break; 379 380 default: 381 error = ENOPROTOOPT; 382 break; 383 } 384 break; 385 386 case PRCO_GETOPT: 387 switch (optname) { 388 #ifdef TCP_SIGNATURE 389 case TCP_MD5SIG: 390 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 391 goto setval; 392 #endif 393 case TCP_NODELAY: 394 optval = tp->t_flags & TF_NODELAY; 395 goto setval; 396 case TCP_MAXSEG: 397 optval = tp->t_peermss; 398 goto setval; 399 case TCP_INFO: 400 tcp_fill_info(tp, &ti); 401 error = sockopt_set(sopt, &ti, sizeof ti); 402 break; 403 #ifdef notyet 404 case TCP_CONGCTL: 405 break; 406 #endif 407 case TCP_KEEPIDLE: 408 optval = tp->t_keepidle; 409 goto setval; 410 case TCP_KEEPINTVL: 411 optval = tp->t_keepintvl; 412 goto setval; 413 case TCP_KEEPCNT: 414 optval = tp->t_keepcnt; 415 goto setval; 416 case TCP_KEEPINIT: 417 optval = tp->t_keepinit; 418 setval: error = sockopt_set(sopt, &optval, sizeof(optval)); 419 break; 420 default: 421 error = ENOPROTOOPT; 422 break; 423 } 424 break; 425 } 426 splx(s); 427 return error; 428 } 429 430 #ifndef TCP_SENDSPACE 431 #define TCP_SENDSPACE 1024*32 432 #endif 433 int tcp_sendspace = TCP_SENDSPACE; 434 #ifndef TCP_RECVSPACE 435 #define TCP_RECVSPACE 1024*32 436 #endif 437 int tcp_recvspace = TCP_RECVSPACE; 438 439 /* 440 * tcp_attach: attach TCP protocol to socket, allocating internet protocol 441 * control block, TCP control block, buffer space and entering LISTEN state 442 * if to accept connections. 443 */ 444 static int 445 tcp_attach(struct socket *so, int proto) 446 { 447 struct tcpcb *tp; 448 struct inpcb *inp; 449 int s, error, family; 450 451 /* Assign the lock (must happen even if we will error out). */ 452 s = splsoftnet(); 453 sosetlock(so); 454 KASSERT(solocked(so)); 455 KASSERT(sotoinpcb(so) == NULL); 456 457 inp = sotoinpcb(so); 458 KASSERT(inp == NULL); 459 460 family = soaf(so); 461 462 #ifdef MBUFTRACE 463 so->so_mowner = &tcp_sock_mowner; 464 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 465 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 466 #endif 467 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 468 error = soreserve(so, tcp_sendspace, tcp_recvspace); 469 if (error) 470 goto out; 471 } 472 473 so->so_rcv.sb_flags |= SB_AUTOSIZE; 474 so->so_snd.sb_flags |= SB_AUTOSIZE; 475 476 error = inpcb_create(so, &tcbtable); 477 if (error) 478 goto out; 479 inp = sotoinpcb(so); 480 481 tp = tcp_newtcpcb(family, inp); 482 if (tp == NULL) { 483 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 484 485 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 486 inpcb_destroy(inp); 487 so->so_state |= nofd; 488 error = ENOBUFS; 489 goto out; 490 } 491 tp->t_state = TCPS_CLOSED; 492 if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 493 so->so_linger = TCP_LINGERTIME; 494 } 495 out: 496 KASSERT(solocked(so)); 497 splx(s); 498 return error; 499 } 500 501 static void 502 tcp_detach(struct socket *so) 503 { 504 struct inpcb *inp; 505 struct tcpcb *tp; 506 int s; 507 508 inp = sotoinpcb(so); 509 if (inp == NULL) 510 return; 511 tp = intotcpcb(inp); 512 513 s = splsoftnet(); 514 (void)tcp_disconnect1(tp); 515 splx(s); 516 } 517 518 static int 519 tcp_accept(struct socket *so, struct sockaddr *nam) 520 { 521 struct inpcb *inp; 522 struct tcpcb *tp; 523 int ostate = 0; 524 int s; 525 526 inp = sotoinpcb(so); 527 if (inp == NULL) 528 return EINVAL; 529 tp = intotcpcb(inp); 530 531 ostate = tcp_debug_capture(tp, PRU_ACCEPT); 532 533 /* 534 * Accept a connection. Essentially all the work is 535 * done at higher levels; just return the address 536 * of the peer, storing through addr. 537 */ 538 s = splsoftnet(); 539 if (inp->inp_af == AF_INET) { 540 inpcb_fetch_peeraddr(inp, (struct sockaddr_in *)nam); 541 } 542 #ifdef INET6 543 else if (inp->inp_af == AF_INET6) { 544 in6pcb_fetch_peeraddr(inp, (struct sockaddr_in6 *)nam); 545 } 546 #endif 547 tcp_debug_trace(so, tp, ostate, PRU_ACCEPT); 548 splx(s); 549 550 return 0; 551 } 552 553 static int 554 tcp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 555 { 556 struct inpcb *inp = NULL; 557 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 558 #ifdef INET6 559 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 560 #endif /* INET6 */ 561 struct tcpcb *tp; 562 int s; 563 int error = 0; 564 int ostate = 0; 565 566 inp = sotoinpcb(so); 567 if (inp == NULL) 568 return EINVAL; 569 tp = intotcpcb(inp); 570 571 ostate = tcp_debug_capture(tp, PRU_BIND); 572 573 /* 574 * Give the socket an address. 575 */ 576 s = splsoftnet(); 577 switch (so->so_proto->pr_domain->dom_family) { 578 case PF_INET: 579 error = inpcb_bind(inp, sin, l); 580 break; 581 #ifdef INET6 582 case PF_INET6: 583 error = in6pcb_bind(inp, sin6, l); 584 if (!error) { 585 /* mapped addr case */ 586 if (IN6_IS_ADDR_V4MAPPED(&in6p_laddr(inp))) 587 tp->t_family = AF_INET; 588 else 589 tp->t_family = AF_INET6; 590 } 591 break; 592 #endif 593 } 594 tcp_debug_trace(so, tp, ostate, PRU_BIND); 595 splx(s); 596 597 return error; 598 } 599 600 static int 601 tcp_listen(struct socket *so, struct lwp *l) 602 { 603 struct inpcb *inp; 604 struct tcpcb *tp; 605 int error = 0; 606 int ostate = 0; 607 int s; 608 609 inp = sotoinpcb(so); 610 if (inp == NULL) 611 return EINVAL; 612 tp = intotcpcb(inp); 613 614 ostate = tcp_debug_capture(tp, PRU_LISTEN); 615 616 /* 617 * Prepare to accept connections. 618 */ 619 s = splsoftnet(); 620 if (inp->inp_af == AF_INET && inp->inp_lport == 0) { 621 error = inpcb_bind(inp, NULL, l); 622 if (error) 623 goto release; 624 } 625 #ifdef INET6 626 if (inp->inp_af == AF_INET6 && inp->inp_lport == 0) { 627 error = in6pcb_bind(inp, NULL, l); 628 if (error) 629 goto release; 630 } 631 #endif 632 tp->t_state = TCPS_LISTEN; 633 634 release: 635 tcp_debug_trace(so, tp, ostate, PRU_LISTEN); 636 splx(s); 637 638 return error; 639 } 640 641 static int 642 tcp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 643 { 644 struct inpcb *inp; 645 struct tcpcb *tp; 646 int s; 647 int error = 0; 648 int ostate = 0; 649 650 inp = sotoinpcb(so); 651 if (inp == NULL) 652 return EINVAL; 653 tp = intotcpcb(inp); 654 655 ostate = tcp_debug_capture(tp, PRU_CONNECT); 656 657 /* 658 * Initiate connection to peer. 659 * Create a template for use in transmissions on this connection. 660 * Enter SYN_SENT state, and mark socket as connecting. 661 * Start keep-alive timer, and seed output sequence space. 662 * Send initial segment on connection. 663 */ 664 s = splsoftnet(); 665 666 if (inp->inp_af == AF_INET) { 667 if (inp->inp_lport == 0) { 668 error = inpcb_bind(inp, NULL, l); 669 if (error) 670 goto release; 671 } 672 error = inpcb_connect(inp, (struct sockaddr_in *)nam, l); 673 } 674 #ifdef INET6 675 if (inp->inp_af == AF_INET6) { 676 if (inp->inp_lport == 0) { 677 error = in6pcb_bind(inp, NULL, l); 678 if (error) 679 goto release; 680 } 681 error = in6pcb_connect(inp, (struct sockaddr_in6 *)nam, l); 682 if (!error) { 683 /* mapped addr case */ 684 if (IN6_IS_ADDR_V4MAPPED(&in6p_faddr(inp))) 685 tp->t_family = AF_INET; 686 else 687 tp->t_family = AF_INET6; 688 } 689 } 690 #endif 691 if (error) 692 goto release; 693 tp->t_template = tcp_template(tp); 694 if (tp->t_template == 0) { 695 if (inp->inp_af == AF_INET) 696 inpcb_disconnect(inp); 697 #ifdef INET6 698 else if (inp->inp_af == AF_INET6) 699 in6pcb_disconnect(inp); 700 #endif 701 error = ENOBUFS; 702 goto release; 703 } 704 /* 705 * Compute window scaling to request. 706 * XXX: This should be moved to tcp_output(). 707 */ 708 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 709 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 710 tp->request_r_scale++; 711 soisconnecting(so); 712 TCP_STATINC(TCP_STAT_CONNATTEMPT); 713 tp->t_state = TCPS_SYN_SENT; 714 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 715 tp->iss = tcp_new_iss(tp); 716 tcp_sendseqinit(tp); 717 error = tcp_output(tp); 718 719 release: 720 tcp_debug_trace(so, tp, ostate, PRU_CONNECT); 721 splx(s); 722 723 return error; 724 } 725 726 static int 727 tcp_connect2(struct socket *so, struct socket *so2) 728 { 729 struct inpcb *inp; 730 struct tcpcb *tp; 731 int ostate = 0; 732 733 KASSERT(solocked(so)); 734 735 inp = sotoinpcb(so); 736 if (inp == NULL) 737 return EINVAL; 738 tp = intotcpcb(inp); 739 740 ostate = tcp_debug_capture(tp, PRU_CONNECT2); 741 742 tcp_debug_trace(so, tp, ostate, PRU_CONNECT2); 743 744 return EOPNOTSUPP; 745 } 746 747 static int 748 tcp_disconnect(struct socket *so) 749 { 750 struct inpcb *inp; 751 struct tcpcb *tp; 752 int error = 0; 753 int ostate = 0; 754 int s; 755 756 inp = sotoinpcb(so); 757 if (inp == NULL) 758 return EINVAL; 759 tp = intotcpcb(inp); 760 761 ostate = tcp_debug_capture(tp, PRU_DISCONNECT); 762 763 /* 764 * Initiate disconnect from peer. 765 * If connection never passed embryonic stage, just drop; 766 * else if don't need to let data drain, then can just drop anyways, 767 * else have to begin TCP shutdown process: mark socket disconnecting, 768 * drain unread data, state switch to reflect user close, and 769 * send segment (e.g. FIN) to peer. Socket will be really disconnected 770 * when peer sends FIN and acks ours. 771 * 772 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 773 */ 774 s = splsoftnet(); 775 tp = tcp_disconnect1(tp); 776 tcp_debug_trace(so, tp, ostate, PRU_DISCONNECT); 777 splx(s); 778 779 return error; 780 } 781 782 static int 783 tcp_shutdown(struct socket *so) 784 { 785 struct inpcb *inp; 786 struct tcpcb *tp; 787 int error = 0; 788 int ostate = 0; 789 int s; 790 791 inp = sotoinpcb(so); 792 if (inp == NULL) 793 return EINVAL; 794 tp = intotcpcb(inp); 795 796 ostate = tcp_debug_capture(tp, PRU_SHUTDOWN); 797 /* 798 * Mark the connection as being incapable of further output. 799 */ 800 s = splsoftnet(); 801 socantsendmore(so); 802 tp = tcp_usrclosed(tp); 803 if (tp) 804 error = tcp_output(tp); 805 tcp_debug_trace(so, tp, ostate, PRU_SHUTDOWN); 806 splx(s); 807 808 return error; 809 } 810 811 static int 812 tcp_abort(struct socket *so) 813 { 814 struct inpcb *inp; 815 struct tcpcb *tp; 816 int error = 0; 817 int ostate = 0; 818 int s; 819 820 inp = sotoinpcb(so); 821 if (inp == NULL) 822 return EINVAL; 823 tp = intotcpcb(inp); 824 825 ostate = tcp_debug_capture(tp, PRU_ABORT); 826 827 /* 828 * Abort the TCP. 829 */ 830 s = splsoftnet(); 831 tp = tcp_drop(tp, ECONNABORTED); 832 tcp_debug_trace(so, tp, ostate, PRU_ABORT); 833 splx(s); 834 835 return error; 836 } 837 838 static int 839 tcp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 840 { 841 switch (so->so_proto->pr_domain->dom_family) { 842 case PF_INET: 843 return in_control(so, cmd, nam, ifp); 844 #ifdef INET6 845 case PF_INET6: 846 return in6_control(so, cmd, nam, ifp); 847 #endif 848 default: 849 return EAFNOSUPPORT; 850 } 851 } 852 853 static int 854 tcp_stat(struct socket *so, struct stat *ub) 855 { 856 KASSERT(solocked(so)); 857 858 /* stat: don't bother with a blocksize. */ 859 return 0; 860 } 861 862 static int 863 tcp_peeraddr(struct socket *so, struct sockaddr *nam) 864 { 865 struct inpcb *inp; 866 struct tcpcb *tp; 867 int ostate = 0; 868 int s; 869 870 inp = sotoinpcb(so); 871 if (inp == NULL) 872 return EINVAL; 873 tp = intotcpcb(inp); 874 875 ostate = tcp_debug_capture(tp, PRU_PEERADDR); 876 877 s = splsoftnet(); 878 if (inp->inp_af == AF_INET) { 879 inpcb_fetch_peeraddr(inp, (struct sockaddr_in *)nam); 880 } 881 #ifdef INET6 882 else if (inp->inp_af == AF_INET6) { 883 in6pcb_fetch_peeraddr(inp, (struct sockaddr_in6 *)nam); 884 } 885 #endif 886 tcp_debug_trace(so, tp, ostate, PRU_PEERADDR); 887 splx(s); 888 889 return 0; 890 } 891 892 static int 893 tcp_sockaddr(struct socket *so, struct sockaddr *nam) 894 { 895 struct inpcb *inp; 896 struct tcpcb *tp; 897 int ostate = 0; 898 int s; 899 900 inp = sotoinpcb(so); 901 if (inp == NULL) 902 return EINVAL; 903 tp = intotcpcb(inp); 904 905 ostate = tcp_debug_capture(tp, PRU_SOCKADDR); 906 907 s = splsoftnet(); 908 if (inp->inp_af == AF_INET) { 909 inpcb_fetch_sockaddr(inp, (struct sockaddr_in *)nam); 910 } 911 #ifdef INET6 912 if (inp->inp_af == AF_INET6) { 913 in6pcb_fetch_sockaddr(inp, (struct sockaddr_in6 *)nam); 914 } 915 #endif 916 tcp_debug_trace(so, tp, ostate, PRU_SOCKADDR); 917 splx(s); 918 919 return 0; 920 } 921 922 static int 923 tcp_rcvd(struct socket *so, int flags, struct lwp *l) 924 { 925 struct inpcb *inp; 926 struct tcpcb *tp; 927 int ostate = 0; 928 int s; 929 930 inp = sotoinpcb(so); 931 if (inp == NULL) 932 return EINVAL; 933 tp = intotcpcb(inp); 934 935 ostate = tcp_debug_capture(tp, PRU_RCVD); 936 937 /* 938 * After a receive, possibly send window update to peer. 939 * 940 * soreceive() calls this function when a user receives 941 * ancillary data on a listening socket. We don't call 942 * tcp_output in such a case, since there is no header 943 * template for a listening socket and hence the kernel 944 * will panic. 945 */ 946 s = splsoftnet(); 947 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 948 (void) tcp_output(tp); 949 splx(s); 950 951 tcp_debug_trace(so, tp, ostate, PRU_RCVD); 952 953 return 0; 954 } 955 956 static int 957 tcp_recvoob(struct socket *so, struct mbuf *m, int flags) 958 { 959 struct inpcb *inp; 960 struct tcpcb *tp; 961 int ostate = 0; 962 int s; 963 964 inp = sotoinpcb(so); 965 if (inp == NULL) 966 return EINVAL; 967 tp = intotcpcb(inp); 968 969 ostate = tcp_debug_capture(tp, PRU_RCVOOB); 970 971 s = splsoftnet(); 972 if ((so->so_oobmark == 0 && 973 (so->so_state & SS_RCVATMARK) == 0) || 974 so->so_options & SO_OOBINLINE || 975 tp->t_oobflags & TCPOOB_HADDATA) { 976 splx(s); 977 return EINVAL; 978 } 979 980 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 981 splx(s); 982 return EWOULDBLOCK; 983 } 984 985 m->m_len = 1; 986 *mtod(m, char *) = tp->t_iobc; 987 if ((flags & MSG_PEEK) == 0) { 988 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 989 so->so_state &= ~SS_POLLRDBAND; 990 } 991 992 tcp_debug_trace(so, tp, ostate, PRU_RCVOOB); 993 splx(s); 994 995 return 0; 996 } 997 998 static int 999 tcp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 1000 struct mbuf *control, struct lwp *l) 1001 { 1002 struct inpcb *inp; 1003 struct tcpcb *tp; 1004 int ostate = 0; 1005 int error = 0; 1006 int s; 1007 1008 inp = sotoinpcb(so); 1009 if (inp == NULL) 1010 return EINVAL; 1011 tp = intotcpcb(inp); 1012 1013 ostate = tcp_debug_capture(tp, PRU_SEND); 1014 1015 /* 1016 * Do a send by putting data in output queue and updating urgent 1017 * marker if URG set. Possibly send more data. 1018 */ 1019 s = splsoftnet(); 1020 if (control && control->m_len) { 1021 m_freem(control); 1022 m_freem(m); 1023 tcp_debug_trace(so, tp, ostate, PRU_SEND); 1024 splx(s); 1025 return EINVAL; 1026 } 1027 1028 sbappendstream(&so->so_snd, m); 1029 error = tcp_output(tp); 1030 tcp_debug_trace(so, tp, ostate, PRU_SEND); 1031 splx(s); 1032 1033 return error; 1034 } 1035 1036 static int 1037 tcp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1038 { 1039 struct inpcb *inp = NULL; 1040 struct tcpcb *tp = NULL; 1041 int ostate = 0; 1042 int error = 0; 1043 int s; 1044 1045 inp = sotoinpcb(so); 1046 if (inp == NULL) { 1047 m_freem(m); 1048 m_freem(control); 1049 return EINVAL; 1050 } 1051 tp = intotcpcb(inp); 1052 if (tp->t_template == NULL) { 1053 /* 1054 * XXX FreeBSD appears to open the connection 1055 * automagically in this case, but the socket address 1056 * isn't passed through here so we can't do that. 1057 */ 1058 m_freem(m); 1059 m_freem(control); 1060 return ENOTCONN; 1061 } 1062 1063 ostate = tcp_debug_capture(tp, PRU_SENDOOB); 1064 1065 s = splsoftnet(); 1066 if (sbspace_oob(&so->so_snd) == 0) { 1067 m_freem(m); 1068 m_freem(control); 1069 splx(s); 1070 return ENOBUFS; 1071 } 1072 /* 1073 * According to RFC961 (Assigned Protocols), 1074 * the urgent pointer points to the last octet 1075 * of urgent data. We continue, however, 1076 * to consider it to indicate the first octet 1077 * of data past the urgent section. 1078 * Otherwise, snd_up should be one lower. 1079 */ 1080 sbappendstream(&so->so_snd, m); 1081 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 1082 tp->t_force = 1; 1083 error = tcp_output(tp); 1084 tp->t_force = 0; 1085 tcp_debug_trace(so, tp, ostate, PRU_SENDOOB); 1086 splx(s); 1087 m_freem(control); 1088 1089 return error; 1090 } 1091 1092 static int 1093 tcp_purgeif(struct socket *so, struct ifnet *ifp) 1094 { 1095 int s; 1096 int error = 0; 1097 1098 s = splsoftnet(); 1099 1100 mutex_enter(softnet_lock); 1101 switch (so->so_proto->pr_domain->dom_family) { 1102 case PF_INET: 1103 inpcb_purgeif0(&tcbtable, ifp); 1104 #ifdef NET_MPSAFE 1105 mutex_exit(softnet_lock); 1106 #endif 1107 in_purgeif(ifp); 1108 #ifdef NET_MPSAFE 1109 mutex_enter(softnet_lock); 1110 #endif 1111 inpcb_purgeif(&tcbtable, ifp); 1112 break; 1113 #ifdef INET6 1114 case PF_INET6: 1115 in6pcb_purgeif0(&tcbtable, ifp); 1116 #ifdef NET_MPSAFE 1117 mutex_exit(softnet_lock); 1118 #endif 1119 in6_purgeif(ifp); 1120 #ifdef NET_MPSAFE 1121 mutex_enter(softnet_lock); 1122 #endif 1123 in6pcb_purgeif(&tcbtable, ifp); 1124 break; 1125 #endif 1126 default: 1127 error = EAFNOSUPPORT; 1128 break; 1129 } 1130 mutex_exit(softnet_lock); 1131 splx(s); 1132 1133 return error; 1134 } 1135 1136 /* 1137 * Initiate (or continue) disconnect. 1138 * If embryonic state, just send reset (once). 1139 * If in ``let data drain'' option and linger null, just drop. 1140 * Otherwise (hard), mark socket disconnecting and drop 1141 * current input data; switch states based on user close, and 1142 * send segment to peer (with FIN). 1143 */ 1144 struct tcpcb * 1145 tcp_disconnect1(struct tcpcb *tp) 1146 { 1147 struct socket *so; 1148 1149 so = tp->t_inpcb->inp_socket; 1150 1151 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 1152 tp = tcp_close(tp); 1153 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 1154 tp = tcp_drop(tp, 0); 1155 else { 1156 soisdisconnecting(so); 1157 sbflush(&so->so_rcv); 1158 tp = tcp_usrclosed(tp); 1159 if (tp) 1160 (void) tcp_output(tp); 1161 } 1162 return tp; 1163 } 1164 1165 /* 1166 * User issued close, and wish to trail through shutdown states: 1167 * if never received SYN, just forget it. If got a SYN from peer, 1168 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 1169 * If already got a FIN from peer, then almost done; go to LAST_ACK 1170 * state. In all other cases, have already sent FIN to peer (e.g. 1171 * after PRU_SHUTDOWN), and just have to play tedious game waiting 1172 * for peer to send FIN or not respond to keep-alives, etc. 1173 * We can let the user exit from the close as soon as the FIN is acked. 1174 */ 1175 struct tcpcb * 1176 tcp_usrclosed(struct tcpcb *tp) 1177 { 1178 1179 switch (tp->t_state) { 1180 1181 case TCPS_CLOSED: 1182 case TCPS_LISTEN: 1183 case TCPS_SYN_SENT: 1184 tp->t_state = TCPS_CLOSED; 1185 tp = tcp_close(tp); 1186 break; 1187 1188 case TCPS_SYN_RECEIVED: 1189 case TCPS_ESTABLISHED: 1190 tp->t_state = TCPS_FIN_WAIT_1; 1191 break; 1192 1193 case TCPS_CLOSE_WAIT: 1194 tp->t_state = TCPS_LAST_ACK; 1195 break; 1196 } 1197 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 1198 struct socket *so = tp->t_inpcb->inp_socket; 1199 if (so) 1200 soisdisconnected(so); 1201 /* 1202 * If we are in FIN_WAIT_2, we arrived here because the 1203 * application did a shutdown of the send side. Like the 1204 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1205 * a full close, we start a timer to make sure sockets are 1206 * not left in FIN_WAIT_2 forever. 1207 */ 1208 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1209 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1210 else if (tp->t_state == TCPS_TIME_WAIT 1211 && ((tp->t_inpcb->inp_af == AF_INET 1212 && (tcp4_vtw_enable & 1) 1213 && vtw_add(AF_INET, tp)) 1214 || 1215 (tp->t_inpcb->inp_af == AF_INET6 1216 && (tcp6_vtw_enable & 1) 1217 && vtw_add(AF_INET6, tp)))) { 1218 tp = 0; 1219 } 1220 } 1221 return tp; 1222 } 1223 1224 /* 1225 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1226 * than 32. 1227 */ 1228 static int 1229 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1230 { 1231 int error, mssdflt; 1232 struct sysctlnode node; 1233 1234 mssdflt = tcp_mssdflt; 1235 node = *rnode; 1236 node.sysctl_data = &mssdflt; 1237 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1238 if (error || newp == NULL) 1239 return error; 1240 1241 if (mssdflt < 32) 1242 return EINVAL; 1243 tcp_mssdflt = mssdflt; 1244 1245 mutex_enter(softnet_lock); 1246 tcp_tcpcb_template(); 1247 mutex_exit(softnet_lock); 1248 1249 return 0; 1250 } 1251 1252 /* 1253 * sysctl helper for TCP CB template update 1254 */ 1255 static int 1256 sysctl_update_tcpcb_template(SYSCTLFN_ARGS) 1257 { 1258 int t, error; 1259 struct sysctlnode node; 1260 1261 /* follow procedures in sysctl(9) manpage */ 1262 t = *(int *)rnode->sysctl_data; 1263 node = *rnode; 1264 node.sysctl_data = &t; 1265 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1266 if (error || newp == NULL) 1267 return error; 1268 1269 if (t < 0) 1270 return EINVAL; 1271 1272 *(int *)rnode->sysctl_data = t; 1273 1274 mutex_enter(softnet_lock); 1275 tcp_tcpcb_template(); 1276 mutex_exit(softnet_lock); 1277 1278 return 0; 1279 } 1280 1281 /* 1282 * sysctl helper routine for setting port related values under 1283 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1284 * additional checks for each type. this code has placed in 1285 * tcp_input.c since INET and INET6 both use the same tcp code. 1286 * 1287 * this helper is not static so that both inet and inet6 can use it. 1288 */ 1289 int 1290 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1291 { 1292 int error, tmp; 1293 int apmin, apmax; 1294 #ifndef IPNOPRIVPORTS 1295 int lpmin, lpmax; 1296 #endif /* IPNOPRIVPORTS */ 1297 struct sysctlnode node; 1298 1299 if (namelen != 0) 1300 return EINVAL; 1301 1302 switch (name[-3]) { 1303 case PF_INET: 1304 apmin = anonportmin; 1305 apmax = anonportmax; 1306 #ifndef IPNOPRIVPORTS 1307 lpmin = lowportmin; 1308 lpmax = lowportmax; 1309 #endif /* IPNOPRIVPORTS */ 1310 break; 1311 #ifdef INET6 1312 case PF_INET6: 1313 apmin = ip6_anonportmin; 1314 apmax = ip6_anonportmax; 1315 #ifndef IPNOPRIVPORTS 1316 lpmin = ip6_lowportmin; 1317 lpmax = ip6_lowportmax; 1318 #endif /* IPNOPRIVPORTS */ 1319 break; 1320 #endif /* INET6 */ 1321 default: 1322 return EINVAL; 1323 } 1324 1325 /* 1326 * insert temporary copy into node, perform lookup on 1327 * temporary, then restore pointer 1328 */ 1329 node = *rnode; 1330 tmp = *(int*)rnode->sysctl_data; 1331 node.sysctl_data = &tmp; 1332 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1333 if (error || newp == NULL) 1334 return error; 1335 1336 /* 1337 * simple port range check 1338 */ 1339 if (tmp < 0 || tmp > 65535) 1340 return EINVAL; 1341 1342 /* 1343 * per-node range checks 1344 */ 1345 switch (rnode->sysctl_num) { 1346 case IPCTL_ANONPORTMIN: 1347 case IPV6CTL_ANONPORTMIN: 1348 if (tmp >= apmax) 1349 return EINVAL; 1350 #ifndef IPNOPRIVPORTS 1351 if (tmp < IPPORT_RESERVED) 1352 return EINVAL; 1353 #endif /* IPNOPRIVPORTS */ 1354 break; 1355 1356 case IPCTL_ANONPORTMAX: 1357 case IPV6CTL_ANONPORTMAX: 1358 if (apmin >= tmp) 1359 return EINVAL; 1360 #ifndef IPNOPRIVPORTS 1361 if (tmp < IPPORT_RESERVED) 1362 return EINVAL; 1363 #endif /* IPNOPRIVPORTS */ 1364 break; 1365 1366 #ifndef IPNOPRIVPORTS 1367 case IPCTL_LOWPORTMIN: 1368 case IPV6CTL_LOWPORTMIN: 1369 if (tmp >= lpmax || 1370 tmp > IPPORT_RESERVEDMAX || 1371 tmp < IPPORT_RESERVEDMIN) 1372 return EINVAL; 1373 break; 1374 1375 case IPCTL_LOWPORTMAX: 1376 case IPV6CTL_LOWPORTMAX: 1377 if (lpmin >= tmp || 1378 tmp > IPPORT_RESERVEDMAX || 1379 tmp < IPPORT_RESERVEDMIN) 1380 return EINVAL; 1381 break; 1382 #endif /* IPNOPRIVPORTS */ 1383 1384 default: 1385 return EINVAL; 1386 } 1387 1388 *(int*)rnode->sysctl_data = tmp; 1389 1390 return 0; 1391 } 1392 1393 static inline int 1394 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1395 { 1396 if (oldp) { 1397 size_t sz; 1398 uid_t uid; 1399 int error; 1400 1401 if (sockp->so_cred == NULL) 1402 return EPERM; 1403 1404 uid = kauth_cred_geteuid(sockp->so_cred); 1405 sz = MIN(sizeof(uid), *oldlenp); 1406 if ((error = copyout(&uid, oldp, sz)) != 0) 1407 return error; 1408 } 1409 *oldlenp = sizeof(uid_t); 1410 return 0; 1411 } 1412 1413 static inline int 1414 inet4_ident_core(struct in_addr raddr, u_int rport, 1415 struct in_addr laddr, u_int lport, 1416 void *oldp, size_t *oldlenp, 1417 struct lwp *l, int dodrop) 1418 { 1419 struct inpcb *inp; 1420 struct socket *sockp; 1421 1422 inp = inpcb_lookup(&tcbtable, raddr, rport, laddr, lport, 0); 1423 1424 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1425 return ESRCH; 1426 1427 if (dodrop) { 1428 struct tcpcb *tp; 1429 int error; 1430 1431 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1432 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1433 return ESRCH; 1434 1435 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1436 KAUTH_REQ_NETWORK_SOCKET_DROP, inp->inp_socket, tp, NULL); 1437 if (error) 1438 return error; 1439 1440 (void)tcp_drop(tp, ECONNABORTED); 1441 return 0; 1442 } 1443 1444 return copyout_uid(sockp, oldp, oldlenp); 1445 } 1446 1447 #ifdef INET6 1448 static inline int 1449 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1450 struct in6_addr *laddr, u_int lport, 1451 void *oldp, size_t *oldlenp, 1452 struct lwp *l, int dodrop) 1453 { 1454 struct inpcb *inp; 1455 struct socket *sockp; 1456 1457 inp = in6pcb_lookup(&tcbtable, raddr, rport, laddr, lport, 0, 0); 1458 1459 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1460 return ESRCH; 1461 1462 if (dodrop) { 1463 struct tcpcb *tp; 1464 int error; 1465 1466 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1467 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1468 return ESRCH; 1469 1470 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1471 KAUTH_REQ_NETWORK_SOCKET_DROP, inp->inp_socket, tp, NULL); 1472 if (error) 1473 return error; 1474 1475 (void)tcp_drop(tp, ECONNABORTED); 1476 return 0; 1477 } 1478 1479 return copyout_uid(sockp, oldp, oldlenp); 1480 } 1481 #endif 1482 1483 /* 1484 * sysctl helper routine for the net.inet.tcp.drop and 1485 * net.inet6.tcp6.drop nodes. 1486 */ 1487 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1488 1489 /* 1490 * sysctl helper routine for the net.inet.tcp.ident and 1491 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1492 * old way of looking up the ident information for ipv4 which involves 1493 * stuffing the port/addr pairs into the mib lookup. 1494 */ 1495 static int 1496 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1497 { 1498 struct sockaddr_in *si4[2]; 1499 #ifdef INET6 1500 struct sockaddr_in6 *si6[2]; 1501 #endif 1502 struct sockaddr_storage sa[2]; 1503 int error, pf, dodrop; 1504 1505 dodrop = name[-1] == TCPCTL_DROP; 1506 if (dodrop) { 1507 if (oldp != NULL || *oldlenp != 0) 1508 return EINVAL; 1509 if (newp == NULL) 1510 return EPERM; 1511 if (newlen < sizeof(sa)) 1512 return ENOMEM; 1513 } 1514 if (namelen != 4 && namelen != 0) 1515 return EINVAL; 1516 if (name[-2] != IPPROTO_TCP) 1517 return EINVAL; 1518 pf = name[-3]; 1519 1520 /* old style lookup, ipv4 only */ 1521 if (namelen == 4) { 1522 struct in_addr laddr, raddr; 1523 u_int lport, rport; 1524 1525 if (pf != PF_INET) 1526 return EPROTONOSUPPORT; 1527 raddr.s_addr = (uint32_t)name[0]; 1528 rport = (u_int)name[1]; 1529 laddr.s_addr = (uint32_t)name[2]; 1530 lport = (u_int)name[3]; 1531 1532 mutex_enter(softnet_lock); 1533 error = inet4_ident_core(raddr, rport, laddr, lport, 1534 oldp, oldlenp, l, dodrop); 1535 mutex_exit(softnet_lock); 1536 return error; 1537 } 1538 1539 if (newp == NULL || newlen != sizeof(sa)) 1540 return EINVAL; 1541 error = copyin(newp, &sa, newlen); 1542 if (error) 1543 return error; 1544 1545 /* 1546 * requested families must match 1547 */ 1548 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1549 return EINVAL; 1550 1551 switch (pf) { 1552 #ifdef INET6 1553 case PF_INET6: 1554 si6[0] = (struct sockaddr_in6*)&sa[0]; 1555 si6[1] = (struct sockaddr_in6*)&sa[1]; 1556 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1557 si6[1]->sin6_len != sizeof(*si6[1])) 1558 return EINVAL; 1559 1560 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1561 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1562 error = sa6_embedscope(si6[0], ip6_use_defzone); 1563 if (error) 1564 return error; 1565 error = sa6_embedscope(si6[1], ip6_use_defzone); 1566 if (error) 1567 return error; 1568 1569 mutex_enter(softnet_lock); 1570 error = inet6_ident_core(&si6[0]->sin6_addr, 1571 si6[0]->sin6_port, &si6[1]->sin6_addr, 1572 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1573 mutex_exit(softnet_lock); 1574 return error; 1575 } 1576 1577 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1578 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1579 return EINVAL; 1580 1581 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1582 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1583 #endif /* INET6 */ 1584 /*FALLTHROUGH*/ 1585 case PF_INET: 1586 si4[0] = (struct sockaddr_in*)&sa[0]; 1587 si4[1] = (struct sockaddr_in*)&sa[1]; 1588 if (si4[0]->sin_len != sizeof(*si4[0]) || 1589 si4[0]->sin_len != sizeof(*si4[1])) 1590 return EINVAL; 1591 1592 mutex_enter(softnet_lock); 1593 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1594 si4[1]->sin_addr, si4[1]->sin_port, 1595 oldp, oldlenp, l, dodrop); 1596 mutex_exit(softnet_lock); 1597 return error; 1598 default: 1599 return EPROTONOSUPPORT; 1600 } 1601 } 1602 1603 /* 1604 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1605 * inet/inet6, as well as raw pcbs for each. specifically not 1606 * declared static so that raw sockets and udp/udp6 can use it as 1607 * well. 1608 */ 1609 int 1610 sysctl_inpcblist(SYSCTLFN_ARGS) 1611 { 1612 const bool allowaddr = get_expose_address(curproc); 1613 struct sockaddr_in *in; 1614 const struct inpcb *inp; 1615 #ifdef INET6 1616 struct sockaddr_in6 *in6; 1617 #endif 1618 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1619 struct tcpcb *tp; 1620 struct kinfo_pcb pcb; 1621 char *dp; 1622 size_t len, needed, elem_size, out_size; 1623 int error, elem_count, pf, proto, pf2; 1624 1625 if (namelen != 4) 1626 return EINVAL; 1627 1628 if (oldp != NULL) { 1629 len = *oldlenp; 1630 elem_size = name[2]; 1631 elem_count = name[3]; 1632 if (elem_size != sizeof(pcb)) 1633 return EINVAL; 1634 } else { 1635 len = 0; 1636 elem_count = INT_MAX; 1637 elem_size = sizeof(pcb); 1638 } 1639 error = 0; 1640 dp = oldp; 1641 out_size = elem_size; 1642 needed = 0; 1643 1644 if (namelen == 1 && name[0] == CTL_QUERY) 1645 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1646 1647 if (name - oname != 4) 1648 return EINVAL; 1649 1650 pf = oname[1]; 1651 proto = oname[2]; 1652 pf2 = (oldp != NULL) ? pf : 0; 1653 1654 mutex_enter(softnet_lock); 1655 1656 TAILQ_FOREACH(inp, &pcbtbl->inpt_queue, inp_queue) { 1657 if (inp->inp_af != pf) 1658 continue; 1659 1660 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1661 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inp->inp_socket, NULL, 1662 NULL) != 0) 1663 continue; 1664 1665 memset(&pcb, 0, sizeof(pcb)); 1666 1667 pcb.ki_family = pf; 1668 pcb.ki_type = proto; 1669 1670 switch (pf2) { 1671 case 0: 1672 /* just probing for size */ 1673 break; 1674 case PF_INET: 1675 pcb.ki_family = inp->inp_socket->so_proto-> 1676 pr_domain->dom_family; 1677 pcb.ki_type = inp->inp_socket->so_proto-> 1678 pr_type; 1679 pcb.ki_protocol = inp->inp_socket->so_proto-> 1680 pr_protocol; 1681 pcb.ki_pflags = inp->inp_flags; 1682 1683 pcb.ki_sostate = inp->inp_socket->so_state; 1684 pcb.ki_prstate = inp->inp_state; 1685 if (proto == IPPROTO_TCP) { 1686 tp = intotcpcb(inp); 1687 pcb.ki_tstate = tp->t_state; 1688 pcb.ki_tflags = tp->t_flags; 1689 } 1690 1691 COND_SET_VALUE(pcb.ki_pcbaddr, 1692 PTRTOUINT64(inp), allowaddr); 1693 COND_SET_VALUE(pcb.ki_ppcbaddr, 1694 PTRTOUINT64(inp->inp_ppcb), allowaddr); 1695 COND_SET_VALUE(pcb.ki_sockaddr, 1696 PTRTOUINT64(inp->inp_socket), allowaddr); 1697 1698 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1699 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1700 1701 in = satosin(&pcb.ki_src); 1702 in->sin_len = sizeof(*in); 1703 in->sin_family = pf; 1704 in->sin_port = inp->inp_lport; 1705 in->sin_addr = const_in4p_laddr(inp); 1706 if (pcb.ki_prstate >= INP_CONNECTED) { 1707 in = satosin(&pcb.ki_dst); 1708 in->sin_len = sizeof(*in); 1709 in->sin_family = pf; 1710 in->sin_port = inp->inp_fport; 1711 in->sin_addr = const_in4p_faddr(inp); 1712 } 1713 break; 1714 #ifdef INET6 1715 case PF_INET6: 1716 pcb.ki_family = inp->inp_socket->so_proto-> 1717 pr_domain->dom_family; 1718 pcb.ki_type = inp->inp_socket->so_proto->pr_type; 1719 pcb.ki_protocol = inp->inp_socket->so_proto-> 1720 pr_protocol; 1721 pcb.ki_pflags = inp->inp_flags; 1722 1723 pcb.ki_sostate = inp->inp_socket->so_state; 1724 pcb.ki_prstate = inp->inp_state; 1725 if (proto == IPPROTO_TCP) { 1726 tp = intotcpcb(inp); 1727 pcb.ki_tstate = tp->t_state; 1728 pcb.ki_tflags = tp->t_flags; 1729 } 1730 1731 COND_SET_VALUE(pcb.ki_pcbaddr, 1732 PTRTOUINT64(inp), allowaddr); 1733 COND_SET_VALUE(pcb.ki_ppcbaddr, 1734 PTRTOUINT64(inp->inp_ppcb), allowaddr); 1735 COND_SET_VALUE(pcb.ki_sockaddr, 1736 PTRTOUINT64(inp->inp_socket), allowaddr); 1737 1738 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1739 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1740 1741 in6 = satosin6(&pcb.ki_src); 1742 in6->sin6_len = sizeof(*in6); 1743 in6->sin6_family = pf; 1744 in6->sin6_port = inp->inp_lport; 1745 in6->sin6_flowinfo = const_in6p_flowinfo(inp); 1746 in6->sin6_addr = const_in6p_laddr(inp); 1747 in6->sin6_scope_id = 0; /* XXX? */ 1748 1749 if (pcb.ki_prstate >= INP_CONNECTED) { 1750 in6 = satosin6(&pcb.ki_dst); 1751 in6->sin6_len = sizeof(*in6); 1752 in6->sin6_family = pf; 1753 in6->sin6_port = inp->inp_fport; 1754 in6->sin6_flowinfo = const_in6p_flowinfo(inp); 1755 in6->sin6_addr = const_in6p_faddr(inp); 1756 in6->sin6_scope_id = 0; /* XXX? */ 1757 } 1758 break; 1759 #endif 1760 } 1761 1762 if (len >= elem_size && elem_count > 0) { 1763 error = copyout(&pcb, dp, out_size); 1764 if (error) { 1765 mutex_exit(softnet_lock); 1766 return error; 1767 } 1768 dp += elem_size; 1769 len -= elem_size; 1770 } 1771 needed += elem_size; 1772 if (elem_count > 0 && elem_count != INT_MAX) 1773 elem_count--; 1774 } 1775 1776 *oldlenp = needed; 1777 if (oldp == NULL) 1778 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1779 1780 mutex_exit(softnet_lock); 1781 1782 return error; 1783 } 1784 1785 static int 1786 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1787 { 1788 struct sysctlnode node; 1789 int error; 1790 char newname[TCPCC_MAXLEN]; 1791 1792 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1793 1794 node = *rnode; 1795 node.sysctl_data = newname; 1796 node.sysctl_size = sizeof(newname); 1797 1798 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1799 1800 if (error || 1801 newp == NULL || 1802 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1803 return error; 1804 1805 mutex_enter(softnet_lock); 1806 error = tcp_congctl_select(NULL, newname); 1807 mutex_exit(softnet_lock); 1808 1809 return error; 1810 } 1811 1812 static int 1813 sysctl_tcp_init_win(SYSCTLFN_ARGS) 1814 { 1815 int error; 1816 u_int iw; 1817 struct sysctlnode node; 1818 1819 iw = *(u_int *)rnode->sysctl_data; 1820 node = *rnode; 1821 node.sysctl_data = &iw; 1822 node.sysctl_size = sizeof(iw); 1823 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1824 if (error || newp == NULL) 1825 return error; 1826 1827 if (iw >= __arraycount(tcp_init_win_max)) 1828 return EINVAL; 1829 *(u_int *)rnode->sysctl_data = iw; 1830 return 0; 1831 } 1832 1833 static int 1834 sysctl_tcp_keep(SYSCTLFN_ARGS) 1835 { 1836 int error; 1837 u_int tmp; 1838 struct sysctlnode node; 1839 1840 node = *rnode; 1841 tmp = *(u_int *)rnode->sysctl_data; 1842 node.sysctl_data = &tmp; 1843 1844 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1845 if (error || newp == NULL) 1846 return error; 1847 1848 if (!(tmp > 0 && tmp <= TCP_TIMER_MAXTICKS)) 1849 return EINVAL; 1850 1851 mutex_enter(softnet_lock); 1852 1853 *(u_int *)rnode->sysctl_data = tmp; 1854 tcp_tcpcb_template(); /* update the template */ 1855 1856 mutex_exit(softnet_lock); 1857 return 0; 1858 } 1859 1860 static int 1861 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1862 { 1863 1864 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1865 } 1866 1867 /* 1868 * this (second stage) setup routine is a replacement for tcp_sysctl() 1869 * (which is currently used for ipv4 and ipv6) 1870 */ 1871 static void 1872 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1873 const char *tcpname) 1874 { 1875 const struct sysctlnode *sack_node; 1876 const struct sysctlnode *abc_node; 1877 const struct sysctlnode *ecn_node; 1878 const struct sysctlnode *congctl_node; 1879 const struct sysctlnode *mslt_node; 1880 const struct sysctlnode *vtw_node; 1881 #ifdef TCP_DEBUG 1882 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1883 extern int tcp_debx; 1884 #endif 1885 1886 sysctl_createv(clog, 0, NULL, NULL, 1887 CTLFLAG_PERMANENT, 1888 CTLTYPE_NODE, pfname, NULL, 1889 NULL, 0, NULL, 0, 1890 CTL_NET, pf, CTL_EOL); 1891 sysctl_createv(clog, 0, NULL, NULL, 1892 CTLFLAG_PERMANENT, 1893 CTLTYPE_NODE, tcpname, 1894 SYSCTL_DESCR("TCP related settings"), 1895 NULL, 0, NULL, 0, 1896 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1897 1898 sysctl_createv(clog, 0, NULL, NULL, 1899 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1900 CTLTYPE_INT, "rfc1323", 1901 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1902 sysctl_update_tcpcb_template, 0, &tcp_do_rfc1323, 0, 1903 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1904 sysctl_createv(clog, 0, NULL, NULL, 1905 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1906 CTLTYPE_INT, "sendspace", 1907 SYSCTL_DESCR("Default TCP send buffer size"), 1908 NULL, 0, &tcp_sendspace, 0, 1909 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1910 sysctl_createv(clog, 0, NULL, NULL, 1911 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1912 CTLTYPE_INT, "recvspace", 1913 SYSCTL_DESCR("Default TCP receive buffer size"), 1914 NULL, 0, &tcp_recvspace, 0, 1915 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1916 sysctl_createv(clog, 0, NULL, NULL, 1917 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1918 CTLTYPE_INT, "mssdflt", 1919 SYSCTL_DESCR("Default maximum segment size"), 1920 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1921 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1922 sysctl_createv(clog, 0, NULL, NULL, 1923 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1924 CTLTYPE_INT, "minmss", 1925 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1926 NULL, 0, &tcp_minmss, 0, 1927 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1928 sysctl_createv(clog, 0, NULL, NULL, 1929 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1930 CTLTYPE_INT, "msl", 1931 SYSCTL_DESCR("Maximum Segment Life"), 1932 NULL, 0, &tcp_msl, 0, 1933 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSL, CTL_EOL); 1934 sysctl_createv(clog, 0, NULL, NULL, 1935 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1936 CTLTYPE_INT, "syn_cache_limit", 1937 SYSCTL_DESCR("Maximum number of entries in the TCP " 1938 "compressed state engine"), 1939 NULL, 0, &tcp_syn_cache_limit, 0, 1940 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1941 CTL_EOL); 1942 sysctl_createv(clog, 0, NULL, NULL, 1943 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1944 CTLTYPE_INT, "syn_bucket_limit", 1945 SYSCTL_DESCR("Maximum number of entries per hash " 1946 "bucket in the TCP compressed state " 1947 "engine"), 1948 NULL, 0, &tcp_syn_bucket_limit, 0, 1949 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1950 CTL_EOL); 1951 #if 0 /* obsoleted */ 1952 sysctl_createv(clog, 0, NULL, NULL, 1953 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1954 CTLTYPE_INT, "syn_cache_interval", 1955 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1956 NULL, 0, &tcp_syn_cache_interval, 0, 1957 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1958 CTL_EOL); 1959 #endif 1960 sysctl_createv(clog, 0, NULL, NULL, 1961 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1962 CTLTYPE_INT, "init_win", 1963 SYSCTL_DESCR("Initial TCP congestion window"), 1964 sysctl_tcp_init_win, 0, &tcp_init_win, 0, 1965 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1966 sysctl_createv(clog, 0, NULL, NULL, 1967 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1968 CTLTYPE_INT, "mss_ifmtu", 1969 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1970 NULL, 0, &tcp_mss_ifmtu, 0, 1971 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1972 sysctl_createv(clog, 0, NULL, &sack_node, 1973 CTLFLAG_PERMANENT, 1974 CTLTYPE_NODE, "sack", 1975 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1976 NULL, 0, NULL, 0, 1977 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1978 1979 /* Congctl subtree */ 1980 sysctl_createv(clog, 0, NULL, &congctl_node, 1981 CTLFLAG_PERMANENT, 1982 CTLTYPE_NODE, "congctl", 1983 SYSCTL_DESCR("TCP Congestion Control"), 1984 NULL, 0, NULL, 0, 1985 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1986 sysctl_createv(clog, 0, &congctl_node, NULL, 1987 CTLFLAG_PERMANENT, 1988 CTLTYPE_STRING, "available", 1989 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1990 NULL, 0, tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1991 sysctl_createv(clog, 0, &congctl_node, NULL, 1992 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1993 CTLTYPE_STRING, "selected", 1994 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1995 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1996 CTL_CREATE, CTL_EOL); 1997 1998 sysctl_createv(clog, 0, NULL, NULL, 1999 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2000 CTLTYPE_INT, "win_scale", 2001 SYSCTL_DESCR("Use RFC1323 window scale options"), 2002 sysctl_update_tcpcb_template, 0, &tcp_do_win_scale, 0, 2003 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 2004 sysctl_createv(clog, 0, NULL, NULL, 2005 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2006 CTLTYPE_INT, "timestamps", 2007 SYSCTL_DESCR("Use RFC1323 time stamp options"), 2008 sysctl_update_tcpcb_template, 0, &tcp_do_timestamps, 0, 2009 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 2010 sysctl_createv(clog, 0, NULL, NULL, 2011 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2012 CTLTYPE_INT, "cwm", 2013 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 2014 "Monitoring"), 2015 NULL, 0, &tcp_cwm, 0, 2016 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 2017 sysctl_createv(clog, 0, NULL, NULL, 2018 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2019 CTLTYPE_INT, "cwm_burstsize", 2020 SYSCTL_DESCR("Congestion Window Monitoring allowed " 2021 "burst count in packets"), 2022 NULL, 0, &tcp_cwm_burstsize, 0, 2023 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 2024 CTL_EOL); 2025 sysctl_createv(clog, 0, NULL, NULL, 2026 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2027 CTLTYPE_INT, "ack_on_push", 2028 SYSCTL_DESCR("Immediately return ACK when PSH is " 2029 "received"), 2030 NULL, 0, &tcp_ack_on_push, 0, 2031 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 2032 sysctl_createv(clog, 0, NULL, NULL, 2033 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2034 CTLTYPE_INT, "keepidle", 2035 SYSCTL_DESCR("Allowed connection idle ticks before a " 2036 "keepalive probe is sent"), 2037 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 2038 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 2039 sysctl_createv(clog, 0, NULL, NULL, 2040 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2041 CTLTYPE_INT, "keepintvl", 2042 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 2043 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 2044 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 2045 sysctl_createv(clog, 0, NULL, NULL, 2046 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2047 CTLTYPE_INT, "keepcnt", 2048 SYSCTL_DESCR("Number of keepalive probes to send"), 2049 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 2050 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 2051 sysctl_createv(clog, 0, NULL, NULL, 2052 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 2053 CTLTYPE_INT, "slowhz", 2054 SYSCTL_DESCR("Keepalive ticks per second"), 2055 NULL, PR_SLOWHZ, NULL, 0, 2056 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 2057 sysctl_createv(clog, 0, NULL, NULL, 2058 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2059 CTLTYPE_INT, "log_refused", 2060 SYSCTL_DESCR("Log refused TCP connections"), 2061 NULL, 0, &tcp_log_refused, 0, 2062 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 2063 #if 0 /* obsoleted */ 2064 sysctl_createv(clog, 0, NULL, NULL, 2065 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2066 CTLTYPE_INT, "rstratelimit", NULL, 2067 NULL, 0, &tcp_rst_ratelim, 0, 2068 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 2069 #endif 2070 sysctl_createv(clog, 0, NULL, NULL, 2071 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2072 CTLTYPE_INT, "rstppslimit", 2073 SYSCTL_DESCR("Maximum number of RST packets to send " 2074 "per second"), 2075 NULL, 0, &tcp_rst_ppslim, 0, 2076 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 2077 sysctl_createv(clog, 0, NULL, NULL, 2078 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2079 CTLTYPE_INT, "delack_ticks", 2080 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 2081 NULL, 0, &tcp_delack_ticks, 0, 2082 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 2083 sysctl_createv(clog, 0, NULL, NULL, 2084 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2085 CTLTYPE_INT, "init_win_local", 2086 SYSCTL_DESCR("Initial TCP window size (in segments)"), 2087 sysctl_tcp_init_win, 0, &tcp_init_win_local, 0, 2088 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 2089 CTL_EOL); 2090 sysctl_createv(clog, 0, NULL, NULL, 2091 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2092 CTLTYPE_STRUCT, "ident", 2093 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 2094 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 2095 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 2096 sysctl_createv(clog, 0, NULL, NULL, 2097 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2098 CTLTYPE_INT, "do_loopback_cksum", 2099 SYSCTL_DESCR("Perform TCP checksum on loopback"), 2100 NULL, 0, &tcp_do_loopback_cksum, 0, 2101 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 2102 CTL_EOL); 2103 sysctl_createv(clog, 0, NULL, NULL, 2104 CTLFLAG_PERMANENT, 2105 CTLTYPE_STRUCT, "pcblist", 2106 SYSCTL_DESCR("TCP protocol control block list"), 2107 sysctl_inpcblist, 0, &tcbtable, 0, 2108 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2109 CTL_EOL); 2110 sysctl_createv(clog, 0, NULL, NULL, 2111 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2112 CTLTYPE_INT, "keepinit", 2113 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 2114 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 2115 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2116 2117 /* TCP socket buffers auto-sizing nodes */ 2118 sysctl_createv(clog, 0, NULL, NULL, 2119 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2120 CTLTYPE_INT, "recvbuf_auto", 2121 SYSCTL_DESCR("Enable automatic receive " 2122 "buffer sizing (experimental)"), 2123 NULL, 0, &tcp_do_autorcvbuf, 0, 2124 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2125 sysctl_createv(clog, 0, NULL, NULL, 2126 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2127 CTLTYPE_INT, "recvbuf_inc", 2128 SYSCTL_DESCR("Incrementor step size of " 2129 "automatic receive buffer"), 2130 NULL, 0, &tcp_autorcvbuf_inc, 0, 2131 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2132 sysctl_createv(clog, 0, NULL, NULL, 2133 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2134 CTLTYPE_INT, "recvbuf_max", 2135 SYSCTL_DESCR("Max size of automatic receive buffer"), 2136 NULL, 0, &tcp_autorcvbuf_max, 0, 2137 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2138 2139 sysctl_createv(clog, 0, NULL, NULL, 2140 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2141 CTLTYPE_INT, "sendbuf_auto", 2142 SYSCTL_DESCR("Enable automatic send " 2143 "buffer sizing (experimental)"), 2144 NULL, 0, &tcp_do_autosndbuf, 0, 2145 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2146 sysctl_createv(clog, 0, NULL, NULL, 2147 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2148 CTLTYPE_INT, "sendbuf_inc", 2149 SYSCTL_DESCR("Incrementor step size of " 2150 "automatic send buffer"), 2151 NULL, 0, &tcp_autosndbuf_inc, 0, 2152 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2153 sysctl_createv(clog, 0, NULL, NULL, 2154 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2155 CTLTYPE_INT, "sendbuf_max", 2156 SYSCTL_DESCR("Max size of automatic send buffer"), 2157 NULL, 0, &tcp_autosndbuf_max, 0, 2158 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2159 2160 /* ECN subtree */ 2161 sysctl_createv(clog, 0, NULL, &ecn_node, 2162 CTLFLAG_PERMANENT, 2163 CTLTYPE_NODE, "ecn", 2164 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 2165 NULL, 0, NULL, 0, 2166 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2167 sysctl_createv(clog, 0, &ecn_node, NULL, 2168 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2169 CTLTYPE_INT, "enable", 2170 SYSCTL_DESCR("Enable TCP Explicit Congestion " 2171 "Notification"), 2172 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 2173 sysctl_createv(clog, 0, &ecn_node, NULL, 2174 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2175 CTLTYPE_INT, "maxretries", 2176 SYSCTL_DESCR("Number of times to retry ECN setup " 2177 "before disabling ECN on the connection"), 2178 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 2179 2180 /* SACK gets its own little subtree. */ 2181 sysctl_createv(clog, 0, NULL, &sack_node, 2182 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2183 CTLTYPE_INT, "enable", 2184 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 2185 NULL, 0, &tcp_do_sack, 0, 2186 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2187 sysctl_createv(clog, 0, NULL, &sack_node, 2188 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2189 CTLTYPE_INT, "maxholes", 2190 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 2191 NULL, 0, &tcp_sack_tp_maxholes, 0, 2192 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2193 sysctl_createv(clog, 0, NULL, &sack_node, 2194 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2195 CTLTYPE_INT, "globalmaxholes", 2196 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 2197 NULL, 0, &tcp_sack_globalmaxholes, 0, 2198 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2199 sysctl_createv(clog, 0, NULL, &sack_node, 2200 CTLFLAG_PERMANENT, 2201 CTLTYPE_INT, "globalholes", 2202 SYSCTL_DESCR("Global number of TCP SACK holes"), 2203 NULL, 0, &tcp_sack_globalholes, 0, 2204 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2205 2206 sysctl_createv(clog, 0, NULL, NULL, 2207 CTLFLAG_PERMANENT, 2208 CTLTYPE_STRUCT, "stats", 2209 SYSCTL_DESCR("TCP statistics"), 2210 sysctl_net_inet_tcp_stats, 0, NULL, 0, 2211 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 2212 CTL_EOL); 2213 sysctl_createv(clog, 0, NULL, NULL, 2214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2215 CTLTYPE_INT, "local_by_rtt", 2216 SYSCTL_DESCR("Use RTT estimator to decide which hosts " 2217 "are local"), 2218 NULL, 0, &tcp_rttlocal, 0, 2219 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2220 #ifdef TCP_DEBUG 2221 sysctl_createv(clog, 0, NULL, NULL, 2222 CTLFLAG_PERMANENT, 2223 CTLTYPE_STRUCT, "debug", 2224 SYSCTL_DESCR("TCP sockets debug information"), 2225 NULL, 0, &tcp_debug, sizeof(tcp_debug), 2226 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 2227 CTL_EOL); 2228 sysctl_createv(clog, 0, NULL, NULL, 2229 CTLFLAG_PERMANENT, 2230 CTLTYPE_INT, "debx", 2231 SYSCTL_DESCR("Number of TCP debug sockets messages"), 2232 NULL, 0, &tcp_debx, sizeof(tcp_debx), 2233 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 2234 CTL_EOL); 2235 #endif 2236 sysctl_createv(clog, 0, NULL, NULL, 2237 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2238 CTLTYPE_STRUCT, "drop", 2239 SYSCTL_DESCR("TCP drop connection"), 2240 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2241 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2242 sysctl_createv(clog, 0, NULL, NULL, 2243 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2244 CTLTYPE_INT, "iss_hash", 2245 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2246 "hash computation"), 2247 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2248 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2249 CTL_EOL); 2250 2251 /* ABC subtree */ 2252 2253 sysctl_createv(clog, 0, NULL, &abc_node, 2254 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2255 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2256 NULL, 0, NULL, 0, 2257 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2258 sysctl_createv(clog, 0, &abc_node, NULL, 2259 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2260 CTLTYPE_INT, "enable", 2261 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2262 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2263 sysctl_createv(clog, 0, &abc_node, NULL, 2264 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2265 CTLTYPE_INT, "aggressive", 2266 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2267 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2268 2269 /* MSL tuning subtree */ 2270 2271 sysctl_createv(clog, 0, NULL, &mslt_node, 2272 CTLFLAG_PERMANENT, CTLTYPE_NODE, "mslt", 2273 SYSCTL_DESCR("MSL Tuning for TIME_WAIT truncation"), 2274 NULL, 0, NULL, 0, 2275 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2276 sysctl_createv(clog, 0, &mslt_node, NULL, 2277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2278 CTLTYPE_INT, "enable", 2279 SYSCTL_DESCR("Enable TIME_WAIT truncation"), 2280 NULL, 0, &tcp_msl_enable, 0, CTL_CREATE, CTL_EOL); 2281 sysctl_createv(clog, 0, &mslt_node, NULL, 2282 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2283 CTLTYPE_INT, "loopback", 2284 SYSCTL_DESCR("MSL value to use for loopback connections"), 2285 NULL, 0, &tcp_msl_loop, 0, CTL_CREATE, CTL_EOL); 2286 sysctl_createv(clog, 0, &mslt_node, NULL, 2287 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2288 CTLTYPE_INT, "local", 2289 SYSCTL_DESCR("MSL value to use for local connections"), 2290 NULL, 0, &tcp_msl_local, 0, CTL_CREATE, CTL_EOL); 2291 sysctl_createv(clog, 0, &mslt_node, NULL, 2292 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2293 CTLTYPE_INT, "remote", 2294 SYSCTL_DESCR("MSL value to use for remote connections"), 2295 NULL, 0, &tcp_msl_remote, 0, CTL_CREATE, CTL_EOL); 2296 sysctl_createv(clog, 0, &mslt_node, NULL, 2297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2298 CTLTYPE_INT, "remote_threshold", 2299 SYSCTL_DESCR("RTT estimate value to promote local to remote"), 2300 NULL, 0, &tcp_msl_remote_threshold, 0, CTL_CREATE, CTL_EOL); 2301 2302 /* vestigial TIME_WAIT tuning subtree */ 2303 2304 sysctl_createv(clog, 0, NULL, &vtw_node, 2305 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vtw", 2306 SYSCTL_DESCR("Tuning for Vestigial TIME_WAIT"), 2307 NULL, 0, NULL, 0, 2308 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2309 sysctl_createv(clog, 0, &vtw_node, NULL, 2310 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2311 CTLTYPE_INT, "enable", 2312 SYSCTL_DESCR("Enable Vestigial TIME_WAIT"), 2313 sysctl_tcp_vtw_enable, 0, 2314 (pf == AF_INET) ? &tcp4_vtw_enable : &tcp6_vtw_enable, 2315 0, CTL_CREATE, CTL_EOL); 2316 sysctl_createv(clog, 0, &vtw_node, NULL, 2317 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 2318 CTLTYPE_INT, "entries", 2319 SYSCTL_DESCR("Maximum number of vestigial TIME_WAIT entries"), 2320 NULL, 0, &tcp_vtw_entries, 0, CTL_CREATE, CTL_EOL); 2321 } 2322 2323 void 2324 tcp_usrreq_init(void) 2325 { 2326 2327 sysctl_net_inet_tcp_setup2(NULL, PF_INET, "inet", "tcp"); 2328 #ifdef INET6 2329 sysctl_net_inet_tcp_setup2(NULL, PF_INET6, "inet6", "tcp6"); 2330 #endif 2331 } 2332 2333 PR_WRAP_USRREQS(tcp) 2334 #define tcp_attach tcp_attach_wrapper 2335 #define tcp_detach tcp_detach_wrapper 2336 #define tcp_accept tcp_accept_wrapper 2337 #define tcp_bind tcp_bind_wrapper 2338 #define tcp_listen tcp_listen_wrapper 2339 #define tcp_connect tcp_connect_wrapper 2340 #define tcp_connect2 tcp_connect2_wrapper 2341 #define tcp_disconnect tcp_disconnect_wrapper 2342 #define tcp_shutdown tcp_shutdown_wrapper 2343 #define tcp_abort tcp_abort_wrapper 2344 #define tcp_ioctl tcp_ioctl_wrapper 2345 #define tcp_stat tcp_stat_wrapper 2346 #define tcp_peeraddr tcp_peeraddr_wrapper 2347 #define tcp_sockaddr tcp_sockaddr_wrapper 2348 #define tcp_rcvd tcp_rcvd_wrapper 2349 #define tcp_recvoob tcp_recvoob_wrapper 2350 #define tcp_send tcp_send_wrapper 2351 #define tcp_sendoob tcp_sendoob_wrapper 2352 #define tcp_purgeif tcp_purgeif_wrapper 2353 2354 const struct pr_usrreqs tcp_usrreqs = { 2355 .pr_attach = tcp_attach, 2356 .pr_detach = tcp_detach, 2357 .pr_accept = tcp_accept, 2358 .pr_bind = tcp_bind, 2359 .pr_listen = tcp_listen, 2360 .pr_connect = tcp_connect, 2361 .pr_connect2 = tcp_connect2, 2362 .pr_disconnect = tcp_disconnect, 2363 .pr_shutdown = tcp_shutdown, 2364 .pr_abort = tcp_abort, 2365 .pr_ioctl = tcp_ioctl, 2366 .pr_stat = tcp_stat, 2367 .pr_peeraddr = tcp_peeraddr, 2368 .pr_sockaddr = tcp_sockaddr, 2369 .pr_rcvd = tcp_rcvd, 2370 .pr_recvoob = tcp_recvoob, 2371 .pr_send = tcp_send, 2372 .pr_sendoob = tcp_sendoob, 2373 .pr_purgeif = tcp_purgeif, 2374 };
Cache object: e373b36f925e9eadb5412be75c26b844
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