tcp_usrreq.c revision 1.132
1 /* $NetBSD: tcp_usrreq.c,v 1.132 2007/06/20 15:29:19 christos 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 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the NetBSD 55 * Foundation, Inc. and its contributors. 56 * 4. Neither the name of The NetBSD Foundation nor the names of its 57 * contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 61 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 62 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 63 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 64 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 65 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 66 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 67 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 68 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 69 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 70 * POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * Copyright (c) 1982, 1986, 1988, 1993, 1995 75 * The Regents of the University of California. All rights reserved. 76 * 77 * Redistribution and use in source and binary forms, with or without 78 * modification, are permitted provided that the following conditions 79 * are met: 80 * 1. Redistributions of source code must retain the above copyright 81 * notice, this list of conditions and the following disclaimer. 82 * 2. Redistributions in binary form must reproduce the above copyright 83 * notice, this list of conditions and the following disclaimer in the 84 * documentation and/or other materials provided with the distribution. 85 * 3. Neither the name of the University nor the names of its contributors 86 * may be used to endorse or promote products derived from this software 87 * without specific prior written permission. 88 * 89 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 90 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 91 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 92 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 93 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 94 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 95 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 96 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 97 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 98 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 99 * SUCH DAMAGE. 100 * 101 * @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95 102 */ 103 104 #include <sys/cdefs.h> 105 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.132 2007/06/20 15:29:19 christos Exp $"); 106 107 #include "opt_inet.h" 108 #include "opt_ipsec.h" 109 #include "opt_tcp_debug.h" 110 #include "opt_mbuftrace.h" 111 #include "rnd.h" 112 113 #include <sys/param.h> 114 #include <sys/systm.h> 115 #include <sys/kernel.h> 116 #include <sys/malloc.h> 117 #include <sys/mbuf.h> 118 #include <sys/socket.h> 119 #include <sys/socketvar.h> 120 #include <sys/protosw.h> 121 #include <sys/errno.h> 122 #include <sys/stat.h> 123 #include <sys/proc.h> 124 #include <sys/domain.h> 125 #include <sys/sysctl.h> 126 #include <sys/kauth.h> 127 128 #include <net/if.h> 129 #include <net/route.h> 130 131 #include <netinet/in.h> 132 #include <netinet/in_systm.h> 133 #include <netinet/in_var.h> 134 #include <netinet/ip.h> 135 #include <netinet/in_pcb.h> 136 #include <netinet/ip_var.h> 137 #include <netinet/in_offload.h> 138 139 #ifdef INET6 140 #ifndef INET 141 #include <netinet/in.h> 142 #endif 143 #include <netinet/ip6.h> 144 #include <netinet6/in6_pcb.h> 145 #include <netinet6/ip6_var.h> 146 #endif 147 148 #include <netinet/tcp.h> 149 #include <netinet/tcp_fsm.h> 150 #include <netinet/tcp_seq.h> 151 #include <netinet/tcp_timer.h> 152 #include <netinet/tcp_var.h> 153 #include <netinet/tcp_congctl.h> 154 #include <netinet/tcpip.h> 155 #include <netinet/tcp_debug.h> 156 157 #include "opt_tcp_space.h" 158 159 #ifdef IPSEC 160 #include <netinet6/ipsec.h> 161 #endif /*IPSEC*/ 162 163 /* 164 * TCP protocol interface to socket abstraction. 165 */ 166 167 /* 168 * Process a TCP user request for TCP tb. If this is a send request 169 * then m is the mbuf chain of send data. If this is a timer expiration 170 * (called from the software clock routine), then timertype tells which timer. 171 */ 172 /*ARGSUSED*/ 173 int 174 tcp_usrreq(struct socket *so, int req, 175 struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l) 176 { 177 struct inpcb *inp; 178 #ifdef INET6 179 struct in6pcb *in6p; 180 #endif 181 struct tcpcb *tp = NULL; 182 int s; 183 int error = 0; 184 #ifdef TCP_DEBUG 185 int ostate = 0; 186 #endif 187 int family; /* family of the socket */ 188 189 family = so->so_proto->pr_domain->dom_family; 190 191 if (req == PRU_CONTROL) { 192 switch (family) { 193 #ifdef INET 194 case PF_INET: 195 return (in_control(so, (long)m, (void *)nam, 196 (struct ifnet *)control, l)); 197 #endif 198 #ifdef INET6 199 case PF_INET6: 200 return (in6_control(so, (long)m, (void *)nam, 201 (struct ifnet *)control, l)); 202 #endif 203 default: 204 return EAFNOSUPPORT; 205 } 206 } 207 208 s = splsoftnet(); 209 210 if (req == PRU_PURGEIF) { 211 switch (family) { 212 #ifdef INET 213 case PF_INET: 214 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 215 in_purgeif((struct ifnet *)control); 216 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 217 break; 218 #endif 219 #ifdef INET6 220 case PF_INET6: 221 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 222 in6_purgeif((struct ifnet *)control); 223 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 224 break; 225 #endif 226 default: 227 splx(s); 228 return (EAFNOSUPPORT); 229 } 230 splx(s); 231 return (0); 232 } 233 234 switch (family) { 235 #ifdef INET 236 case PF_INET: 237 inp = sotoinpcb(so); 238 #ifdef INET6 239 in6p = NULL; 240 #endif 241 break; 242 #endif 243 #ifdef INET6 244 case PF_INET6: 245 inp = NULL; 246 in6p = sotoin6pcb(so); 247 break; 248 #endif 249 default: 250 splx(s); 251 return EAFNOSUPPORT; 252 } 253 254 #ifdef DIAGNOSTIC 255 #ifdef INET6 256 if (inp && in6p) 257 panic("tcp_usrreq: both inp and in6p set to non-NULL"); 258 #endif 259 if (req != PRU_SEND && req != PRU_SENDOOB && control) 260 panic("tcp_usrreq: unexpected control mbuf"); 261 #endif 262 /* 263 * When a TCP is attached to a socket, then there will be 264 * a (struct inpcb) pointed at by the socket, and this 265 * structure will point at a subsidary (struct tcpcb). 266 */ 267 #ifndef INET6 268 if (inp == 0 && req != PRU_ATTACH) 269 #else 270 if ((inp == 0 && in6p == 0) && req != PRU_ATTACH) 271 #endif 272 { 273 error = EINVAL; 274 goto release; 275 } 276 #ifdef INET 277 if (inp) { 278 tp = intotcpcb(inp); 279 /* WHAT IF TP IS 0? */ 280 #ifdef KPROF 281 tcp_acounts[tp->t_state][req]++; 282 #endif 283 #ifdef TCP_DEBUG 284 ostate = tp->t_state; 285 #endif 286 } 287 #endif 288 #ifdef INET6 289 if (in6p) { 290 tp = in6totcpcb(in6p); 291 /* WHAT IF TP IS 0? */ 292 #ifdef KPROF 293 tcp_acounts[tp->t_state][req]++; 294 #endif 295 #ifdef TCP_DEBUG 296 ostate = tp->t_state; 297 #endif 298 } 299 #endif 300 301 switch (req) { 302 303 /* 304 * TCP attaches to socket via PRU_ATTACH, reserving space, 305 * and an internet control block. 306 */ 307 case PRU_ATTACH: 308 #ifndef INET6 309 if (inp != 0) 310 #else 311 if (inp != 0 || in6p != 0) 312 #endif 313 { 314 error = EISCONN; 315 break; 316 } 317 error = tcp_attach(so); 318 if (error) 319 break; 320 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 321 so->so_linger = TCP_LINGERTIME; 322 tp = sototcpcb(so); 323 break; 324 325 /* 326 * PRU_DETACH detaches the TCP protocol from the socket. 327 */ 328 case PRU_DETACH: 329 tp = tcp_disconnect(tp); 330 break; 331 332 /* 333 * Give the socket an address. 334 */ 335 case PRU_BIND: 336 switch (family) { 337 #ifdef INET 338 case PF_INET: 339 error = in_pcbbind(inp, nam, l); 340 break; 341 #endif 342 #ifdef INET6 343 case PF_INET6: 344 error = in6_pcbbind(in6p, nam, l); 345 if (!error) { 346 /* mapped addr case */ 347 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 348 tp->t_family = AF_INET; 349 else 350 tp->t_family = AF_INET6; 351 } 352 break; 353 #endif 354 } 355 break; 356 357 /* 358 * Prepare to accept connections. 359 */ 360 case PRU_LISTEN: 361 #ifdef INET 362 if (inp && inp->inp_lport == 0) { 363 error = in_pcbbind(inp, (struct mbuf *)0, 364 (struct lwp *)0); 365 if (error) 366 break; 367 } 368 #endif 369 #ifdef INET6 370 if (in6p && in6p->in6p_lport == 0) { 371 error = in6_pcbbind(in6p, (struct mbuf *)0, 372 (struct lwp *)0); 373 if (error) 374 break; 375 } 376 #endif 377 tp->t_state = TCPS_LISTEN; 378 break; 379 380 /* 381 * Initiate connection to peer. 382 * Create a template for use in transmissions on this connection. 383 * Enter SYN_SENT state, and mark socket as connecting. 384 * Start keep-alive timer, and seed output sequence space. 385 * Send initial segment on connection. 386 */ 387 case PRU_CONNECT: 388 #ifdef INET 389 if (inp) { 390 if (inp->inp_lport == 0) { 391 error = in_pcbbind(inp, (struct mbuf *)0, 392 (struct lwp *)0); 393 if (error) 394 break; 395 } 396 error = in_pcbconnect(inp, nam, l); 397 } 398 #endif 399 #ifdef INET6 400 if (in6p) { 401 if (in6p->in6p_lport == 0) { 402 error = in6_pcbbind(in6p, (struct mbuf *)0, 403 (struct lwp *)0); 404 if (error) 405 break; 406 } 407 error = in6_pcbconnect(in6p, nam, l); 408 if (!error) { 409 /* mapped addr case */ 410 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 411 tp->t_family = AF_INET; 412 else 413 tp->t_family = AF_INET6; 414 } 415 } 416 #endif 417 if (error) 418 break; 419 tp->t_template = tcp_template(tp); 420 if (tp->t_template == 0) { 421 #ifdef INET 422 if (inp) 423 in_pcbdisconnect(inp); 424 #endif 425 #ifdef INET6 426 if (in6p) 427 in6_pcbdisconnect(in6p); 428 #endif 429 error = ENOBUFS; 430 break; 431 } 432 /* Compute window scaling to request. */ 433 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 434 (TCP_MAXWIN << tp->request_r_scale) < so->so_rcv.sb_hiwat) 435 tp->request_r_scale++; 436 soisconnecting(so); 437 tcpstat.tcps_connattempt++; 438 tp->t_state = TCPS_SYN_SENT; 439 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 440 tp->iss = tcp_new_iss(tp, 0); 441 tcp_sendseqinit(tp); 442 error = tcp_output(tp); 443 break; 444 445 /* 446 * Create a TCP connection between two sockets. 447 */ 448 case PRU_CONNECT2: 449 error = EOPNOTSUPP; 450 break; 451 452 /* 453 * Initiate disconnect from peer. 454 * If connection never passed embryonic stage, just drop; 455 * else if don't need to let data drain, then can just drop anyways, 456 * else have to begin TCP shutdown process: mark socket disconnecting, 457 * drain unread data, state switch to reflect user close, and 458 * send segment (e.g. FIN) to peer. Socket will be really disconnected 459 * when peer sends FIN and acks ours. 460 * 461 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 462 */ 463 case PRU_DISCONNECT: 464 tp = tcp_disconnect(tp); 465 break; 466 467 /* 468 * Accept a connection. Essentially all the work is 469 * done at higher levels; just return the address 470 * of the peer, storing through addr. 471 */ 472 case PRU_ACCEPT: 473 #ifdef INET 474 if (inp) 475 in_setpeeraddr(inp, nam); 476 #endif 477 #ifdef INET6 478 if (in6p) 479 in6_setpeeraddr(in6p, nam); 480 #endif 481 break; 482 483 /* 484 * Mark the connection as being incapable of further output. 485 */ 486 case PRU_SHUTDOWN: 487 socantsendmore(so); 488 tp = tcp_usrclosed(tp); 489 if (tp) 490 error = tcp_output(tp); 491 break; 492 493 /* 494 * After a receive, possibly send window update to peer. 495 */ 496 case PRU_RCVD: 497 /* 498 * soreceive() calls this function when a user receives 499 * ancillary data on a listening socket. We don't call 500 * tcp_output in such a case, since there is no header 501 * template for a listening socket and hence the kernel 502 * will panic. 503 */ 504 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 505 (void) tcp_output(tp); 506 break; 507 508 /* 509 * Do a send by putting data in output queue and updating urgent 510 * marker if URG set. Possibly send more data. 511 */ 512 case PRU_SEND: 513 if (control && control->m_len) { 514 m_freem(control); 515 m_freem(m); 516 error = EINVAL; 517 break; 518 } 519 sbappendstream(&so->so_snd, m); 520 error = tcp_output(tp); 521 break; 522 523 /* 524 * Abort the TCP. 525 */ 526 case PRU_ABORT: 527 tp = tcp_drop(tp, ECONNABORTED); 528 break; 529 530 case PRU_SENSE: 531 /* 532 * stat: don't bother with a blocksize. 533 */ 534 splx(s); 535 return (0); 536 537 case PRU_RCVOOB: 538 if (control && control->m_len) { 539 m_freem(control); 540 m_freem(m); 541 error = EINVAL; 542 break; 543 } 544 if ((so->so_oobmark == 0 && 545 (so->so_state & SS_RCVATMARK) == 0) || 546 so->so_options & SO_OOBINLINE || 547 tp->t_oobflags & TCPOOB_HADDATA) { 548 error = EINVAL; 549 break; 550 } 551 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 552 error = EWOULDBLOCK; 553 break; 554 } 555 m->m_len = 1; 556 *mtod(m, char *) = tp->t_iobc; 557 if (((long)nam & MSG_PEEK) == 0) 558 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 559 break; 560 561 case PRU_SENDOOB: 562 if (sbspace(&so->so_snd) < -512) { 563 m_freem(m); 564 error = ENOBUFS; 565 break; 566 } 567 /* 568 * According to RFC961 (Assigned Protocols), 569 * the urgent pointer points to the last octet 570 * of urgent data. We continue, however, 571 * to consider it to indicate the first octet 572 * of data past the urgent section. 573 * Otherwise, snd_up should be one lower. 574 */ 575 sbappendstream(&so->so_snd, m); 576 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 577 tp->t_force = 1; 578 error = tcp_output(tp); 579 tp->t_force = 0; 580 break; 581 582 case PRU_SOCKADDR: 583 #ifdef INET 584 if (inp) 585 in_setsockaddr(inp, nam); 586 #endif 587 #ifdef INET6 588 if (in6p) 589 in6_setsockaddr(in6p, nam); 590 #endif 591 break; 592 593 case PRU_PEERADDR: 594 #ifdef INET 595 if (inp) 596 in_setpeeraddr(inp, nam); 597 #endif 598 #ifdef INET6 599 if (in6p) 600 in6_setpeeraddr(in6p, nam); 601 #endif 602 break; 603 604 default: 605 panic("tcp_usrreq"); 606 } 607 #ifdef TCP_DEBUG 608 if (tp && (so->so_options & SO_DEBUG)) 609 tcp_trace(TA_USER, ostate, tp, NULL, req); 610 #endif 611 612 release: 613 splx(s); 614 return (error); 615 } 616 617 static void 618 change_keepalive(struct socket *so, struct tcpcb *tp) 619 { 620 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 621 TCP_TIMER_DISARM(tp, TCPT_KEEP); 622 TCP_TIMER_DISARM(tp, TCPT_2MSL); 623 624 if (tp->t_state == TCPS_SYN_RECEIVED || 625 tp->t_state == TCPS_SYN_SENT) { 626 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 627 } else if (so->so_options & SO_KEEPALIVE && 628 tp->t_state <= TCPS_CLOSE_WAIT) { 629 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 630 } else { 631 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 632 } 633 634 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 635 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 636 } 637 638 639 int 640 tcp_ctloutput(int op, struct socket *so, int level, int optname, 641 struct mbuf **mp) 642 { 643 int error = 0, s; 644 struct inpcb *inp; 645 #ifdef INET6 646 struct in6pcb *in6p; 647 #endif 648 struct tcpcb *tp; 649 struct mbuf *m; 650 int i; 651 u_int ui; 652 int family; /* family of the socket */ 653 654 family = so->so_proto->pr_domain->dom_family; 655 656 s = splsoftnet(); 657 switch (family) { 658 #ifdef INET 659 case PF_INET: 660 inp = sotoinpcb(so); 661 #ifdef INET6 662 in6p = NULL; 663 #endif 664 break; 665 #endif 666 #ifdef INET6 667 case PF_INET6: 668 inp = NULL; 669 in6p = sotoin6pcb(so); 670 break; 671 #endif 672 default: 673 splx(s); 674 panic("%s: af %d", __func__, family); 675 } 676 #ifndef INET6 677 if (inp == NULL) 678 #else 679 if (inp == NULL && in6p == NULL) 680 #endif 681 { 682 splx(s); 683 if (op == PRCO_SETOPT && *mp) 684 (void) m_free(*mp); 685 return (ECONNRESET); 686 } 687 if (level != IPPROTO_TCP) { 688 switch (family) { 689 #ifdef INET 690 case PF_INET: 691 error = ip_ctloutput(op, so, level, optname, mp); 692 break; 693 #endif 694 #ifdef INET6 695 case PF_INET6: 696 error = ip6_ctloutput(op, so, level, optname, mp); 697 break; 698 #endif 699 } 700 splx(s); 701 return (error); 702 } 703 if (inp) 704 tp = intotcpcb(inp); 705 #ifdef INET6 706 else if (in6p) 707 tp = in6totcpcb(in6p); 708 #endif 709 else 710 tp = NULL; 711 712 switch (op) { 713 714 case PRCO_SETOPT: 715 m = *mp; 716 switch (optname) { 717 718 #ifdef TCP_SIGNATURE 719 case TCP_MD5SIG: 720 if (m == NULL || m->m_len < sizeof (int)) 721 error = EINVAL; 722 if (error) 723 break; 724 if (*mtod(m, int *) > 0) 725 tp->t_flags |= TF_SIGNATURE; 726 else 727 tp->t_flags &= ~TF_SIGNATURE; 728 break; 729 #endif /* TCP_SIGNATURE */ 730 731 case TCP_NODELAY: 732 if (m == NULL || m->m_len < sizeof (int)) 733 error = EINVAL; 734 else if (*mtod(m, int *)) 735 tp->t_flags |= TF_NODELAY; 736 else 737 tp->t_flags &= ~TF_NODELAY; 738 break; 739 740 case TCP_MAXSEG: 741 if (m && m->m_len >= sizeof(int) && 742 (i = *mtod(m, int *)) > 0 && 743 i <= tp->t_peermss) 744 tp->t_peermss = i; /* limit on send size */ 745 else 746 error = EINVAL; 747 break; 748 #ifdef notyet 749 case TCP_CONGCTL: 750 if (m == NULL) 751 error = EINVAL; 752 error = tcp_congctl_select(tp, mtod(m, char *)); 753 #endif 754 break; 755 756 case TCP_KEEPIDLE: 757 if (m && m->m_len >= sizeof(u_int) && 758 (ui = *mtod(m, u_int *)) > 0) { 759 tp->t_keepidle = ui; 760 change_keepalive(so, tp); 761 } else 762 error = EINVAL; 763 break; 764 765 case TCP_KEEPINTVL: 766 if (m && m->m_len >= sizeof(u_int) && 767 (ui = *mtod(m, u_int *)) > 0) { 768 tp->t_keepintvl = ui; 769 change_keepalive(so, tp); 770 } else 771 error = EINVAL; 772 break; 773 774 case TCP_KEEPCNT: 775 if (m && m->m_len >= sizeof(u_int) && 776 (ui = *mtod(m, u_int *)) > 0) { 777 tp->t_keepcnt = ui; 778 change_keepalive(so, tp); 779 } else 780 error = EINVAL; 781 break; 782 783 case TCP_KEEPINIT: 784 if (m && m->m_len >= sizeof(u_int) && 785 (ui = *mtod(m, u_int *)) > 0) { 786 tp->t_keepinit = ui; 787 change_keepalive(so, tp); 788 } else 789 error = EINVAL; 790 break; 791 792 default: 793 error = ENOPROTOOPT; 794 break; 795 } 796 if (m) 797 (void) m_free(m); 798 break; 799 800 case PRCO_GETOPT: 801 *mp = m = m_get(M_WAIT, MT_SOOPTS); 802 m->m_len = sizeof(int); 803 MCLAIM(m, so->so_mowner); 804 805 switch (optname) { 806 #ifdef TCP_SIGNATURE 807 case TCP_MD5SIG: 808 *mtod(m, int *) = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 809 break; 810 #endif 811 case TCP_NODELAY: 812 *mtod(m, int *) = tp->t_flags & TF_NODELAY; 813 break; 814 case TCP_MAXSEG: 815 *mtod(m, int *) = tp->t_peermss; 816 break; 817 #ifdef notyet 818 case TCP_CONGCTL: 819 break; 820 #endif 821 default: 822 error = ENOPROTOOPT; 823 break; 824 } 825 break; 826 } 827 splx(s); 828 return (error); 829 } 830 831 #ifndef TCP_SENDSPACE 832 #define TCP_SENDSPACE 1024*32 833 #endif 834 int tcp_sendspace = TCP_SENDSPACE; 835 #ifndef TCP_RECVSPACE 836 #define TCP_RECVSPACE 1024*32 837 #endif 838 int tcp_recvspace = TCP_RECVSPACE; 839 840 /* 841 * Attach TCP protocol to socket, allocating 842 * internet protocol control block, tcp control block, 843 * bufer space, and entering LISTEN state if to accept connections. 844 */ 845 int 846 tcp_attach(struct socket *so) 847 { 848 struct tcpcb *tp; 849 struct inpcb *inp; 850 #ifdef INET6 851 struct in6pcb *in6p; 852 #endif 853 int error; 854 int family; /* family of the socket */ 855 856 family = so->so_proto->pr_domain->dom_family; 857 858 #ifdef MBUFTRACE 859 so->so_mowner = &tcp_sock_mowner; 860 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 861 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 862 #endif 863 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 864 error = soreserve(so, tcp_sendspace, tcp_recvspace); 865 if (error) 866 return (error); 867 } 868 switch (family) { 869 #ifdef INET 870 case PF_INET: 871 error = in_pcballoc(so, &tcbtable); 872 if (error) 873 return (error); 874 inp = sotoinpcb(so); 875 #ifdef INET6 876 in6p = NULL; 877 #endif 878 break; 879 #endif 880 #ifdef INET6 881 case PF_INET6: 882 error = in6_pcballoc(so, &tcbtable); 883 if (error) 884 return (error); 885 inp = NULL; 886 in6p = sotoin6pcb(so); 887 break; 888 #endif 889 default: 890 return EAFNOSUPPORT; 891 } 892 if (inp) 893 tp = tcp_newtcpcb(family, (void *)inp); 894 #ifdef INET6 895 else if (in6p) 896 tp = tcp_newtcpcb(family, (void *)in6p); 897 #endif 898 else 899 tp = NULL; 900 901 if (tp == 0) { 902 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 903 904 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 905 #ifdef INET 906 if (inp) 907 in_pcbdetach(inp); 908 #endif 909 #ifdef INET6 910 if (in6p) 911 in6_pcbdetach(in6p); 912 #endif 913 so->so_state |= nofd; 914 return (ENOBUFS); 915 } 916 tp->t_state = TCPS_CLOSED; 917 return (0); 918 } 919 920 /* 921 * Initiate (or continue) disconnect. 922 * If embryonic state, just send reset (once). 923 * If in ``let data drain'' option and linger null, just drop. 924 * Otherwise (hard), mark socket disconnecting and drop 925 * current input data; switch states based on user close, and 926 * send segment to peer (with FIN). 927 */ 928 struct tcpcb * 929 tcp_disconnect(struct tcpcb *tp) 930 { 931 struct socket *so; 932 933 if (tp->t_inpcb) 934 so = tp->t_inpcb->inp_socket; 935 #ifdef INET6 936 else if (tp->t_in6pcb) 937 so = tp->t_in6pcb->in6p_socket; 938 #endif 939 else 940 so = NULL; 941 942 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 943 tp = tcp_close(tp); 944 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 945 tp = tcp_drop(tp, 0); 946 else { 947 soisdisconnecting(so); 948 sbflush(&so->so_rcv); 949 tp = tcp_usrclosed(tp); 950 if (tp) 951 (void) tcp_output(tp); 952 } 953 return (tp); 954 } 955 956 /* 957 * User issued close, and wish to trail through shutdown states: 958 * if never received SYN, just forget it. If got a SYN from peer, 959 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 960 * If already got a FIN from peer, then almost done; go to LAST_ACK 961 * state. In all other cases, have already sent FIN to peer (e.g. 962 * after PRU_SHUTDOWN), and just have to play tedious game waiting 963 * for peer to send FIN or not respond to keep-alives, etc. 964 * We can let the user exit from the close as soon as the FIN is acked. 965 */ 966 struct tcpcb * 967 tcp_usrclosed(struct tcpcb *tp) 968 { 969 970 switch (tp->t_state) { 971 972 case TCPS_CLOSED: 973 case TCPS_LISTEN: 974 case TCPS_SYN_SENT: 975 tp->t_state = TCPS_CLOSED; 976 tp = tcp_close(tp); 977 break; 978 979 case TCPS_SYN_RECEIVED: 980 case TCPS_ESTABLISHED: 981 tp->t_state = TCPS_FIN_WAIT_1; 982 break; 983 984 case TCPS_CLOSE_WAIT: 985 tp->t_state = TCPS_LAST_ACK; 986 break; 987 } 988 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 989 struct socket *so; 990 if (tp->t_inpcb) 991 so = tp->t_inpcb->inp_socket; 992 #ifdef INET6 993 else if (tp->t_in6pcb) 994 so = tp->t_in6pcb->in6p_socket; 995 #endif 996 else 997 so = NULL; 998 if (so) 999 soisdisconnected(so); 1000 /* 1001 * If we are in FIN_WAIT_2, we arrived here because the 1002 * application did a shutdown of the send side. Like the 1003 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1004 * a full close, we start a timer to make sure sockets are 1005 * not left in FIN_WAIT_2 forever. 1006 */ 1007 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1008 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1009 } 1010 return (tp); 1011 } 1012 1013 /* 1014 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1015 * than 32. 1016 */ 1017 static int 1018 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1019 { 1020 int error, mssdflt; 1021 struct sysctlnode node; 1022 1023 mssdflt = tcp_mssdflt; 1024 node = *rnode; 1025 node.sysctl_data = &mssdflt; 1026 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1027 if (error || newp == NULL) 1028 return (error); 1029 1030 if (mssdflt < 32) 1031 return (EINVAL); 1032 tcp_mssdflt = mssdflt; 1033 1034 return (0); 1035 } 1036 1037 /* 1038 * sysctl helper routine for setting port related values under 1039 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1040 * additional checks for each type. this code has placed in 1041 * tcp_input.c since INET and INET6 both use the same tcp code. 1042 * 1043 * this helper is not static so that both inet and inet6 can use it. 1044 */ 1045 int 1046 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1047 { 1048 int error, tmp; 1049 int apmin, apmax; 1050 #ifndef IPNOPRIVPORTS 1051 int lpmin, lpmax; 1052 #endif /* IPNOPRIVPORTS */ 1053 struct sysctlnode node; 1054 1055 if (namelen != 0) 1056 return (EINVAL); 1057 1058 switch (name[-3]) { 1059 #ifdef INET 1060 case PF_INET: 1061 apmin = anonportmin; 1062 apmax = anonportmax; 1063 #ifndef IPNOPRIVPORTS 1064 lpmin = lowportmin; 1065 lpmax = lowportmax; 1066 #endif /* IPNOPRIVPORTS */ 1067 break; 1068 #endif /* INET */ 1069 #ifdef INET6 1070 case PF_INET6: 1071 apmin = ip6_anonportmin; 1072 apmax = ip6_anonportmax; 1073 #ifndef IPNOPRIVPORTS 1074 lpmin = ip6_lowportmin; 1075 lpmax = ip6_lowportmax; 1076 #endif /* IPNOPRIVPORTS */ 1077 break; 1078 #endif /* INET6 */ 1079 default: 1080 return (EINVAL); 1081 } 1082 1083 /* 1084 * insert temporary copy into node, perform lookup on 1085 * temporary, then restore pointer 1086 */ 1087 node = *rnode; 1088 tmp = *(int*)rnode->sysctl_data; 1089 node.sysctl_data = &tmp; 1090 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1091 if (error || newp == NULL) 1092 return (error); 1093 1094 /* 1095 * simple port range check 1096 */ 1097 if (tmp < 0 || tmp > 65535) 1098 return (EINVAL); 1099 1100 /* 1101 * per-node range checks 1102 */ 1103 switch (rnode->sysctl_num) { 1104 case IPCTL_ANONPORTMIN: 1105 if (tmp >= apmax) 1106 return (EINVAL); 1107 #ifndef IPNOPRIVPORTS 1108 if (tmp < IPPORT_RESERVED) 1109 return (EINVAL); 1110 #endif /* IPNOPRIVPORTS */ 1111 break; 1112 1113 case IPCTL_ANONPORTMAX: 1114 if (apmin >= tmp) 1115 return (EINVAL); 1116 #ifndef IPNOPRIVPORTS 1117 if (tmp < IPPORT_RESERVED) 1118 return (EINVAL); 1119 #endif /* IPNOPRIVPORTS */ 1120 break; 1121 1122 #ifndef IPNOPRIVPORTS 1123 case IPCTL_LOWPORTMIN: 1124 if (tmp >= lpmax || 1125 tmp > IPPORT_RESERVEDMAX || 1126 tmp < IPPORT_RESERVEDMIN) 1127 return (EINVAL); 1128 break; 1129 1130 case IPCTL_LOWPORTMAX: 1131 if (lpmin >= tmp || 1132 tmp > IPPORT_RESERVEDMAX || 1133 tmp < IPPORT_RESERVEDMIN) 1134 return (EINVAL); 1135 break; 1136 #endif /* IPNOPRIVPORTS */ 1137 1138 default: 1139 return (EINVAL); 1140 } 1141 1142 *(int*)rnode->sysctl_data = tmp; 1143 1144 return (0); 1145 } 1146 1147 /* 1148 * sysctl helper routine for the net.inet.tcp.ident and 1149 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1150 * old way of looking up the ident information for ipv4 which involves 1151 * stuffing the port/addr pairs into the mib lookup. 1152 */ 1153 static int 1154 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1155 { 1156 #ifdef INET 1157 struct inpcb *inb; 1158 struct sockaddr_in *si4[2]; 1159 #endif /* INET */ 1160 #ifdef INET6 1161 struct in6pcb *in6b; 1162 struct sockaddr_in6 *si6[2]; 1163 #endif /* INET6 */ 1164 struct sockaddr_storage sa[2]; 1165 struct socket *sockp; 1166 size_t sz; 1167 uid_t uid; 1168 int error, pf; 1169 1170 if (namelen != 4 && namelen != 0) 1171 return (EINVAL); 1172 if (name[-2] != IPPROTO_TCP) 1173 return (EINVAL); 1174 pf = name[-3]; 1175 1176 /* old style lookup, ipv4 only */ 1177 if (namelen == 4) { 1178 #ifdef INET 1179 struct in_addr laddr, raddr; 1180 u_int lport, rport; 1181 1182 if (pf != PF_INET) 1183 return (EPROTONOSUPPORT); 1184 raddr.s_addr = (uint32_t)name[0]; 1185 rport = (u_int)name[1]; 1186 laddr.s_addr = (uint32_t)name[2]; 1187 lport = (u_int)name[3]; 1188 inb = in_pcblookup_connect(&tcbtable, raddr, rport, 1189 laddr, lport); 1190 if (inb == NULL || (sockp = inb->inp_socket) == NULL) 1191 return (ESRCH); 1192 uid = sockp->so_uidinfo->ui_uid; 1193 if (oldp) { 1194 sz = MIN(sizeof(uid), *oldlenp); 1195 error = copyout(&uid, oldp, sz); 1196 if (error) 1197 return (error); 1198 } 1199 *oldlenp = sizeof(uid); 1200 return (0); 1201 #else /* INET */ 1202 return (EINVAL); 1203 #endif /* INET */ 1204 } 1205 1206 if (newp == NULL || newlen != sizeof(sa)) 1207 return (EINVAL); 1208 error = copyin(newp, &sa, newlen); 1209 if (error) 1210 return (error); 1211 1212 /* 1213 * requested families must match 1214 */ 1215 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1216 return (EINVAL); 1217 1218 switch (pf) { 1219 #ifdef INET 1220 case PF_INET: 1221 si4[0] = (struct sockaddr_in*)&sa[0]; 1222 si4[1] = (struct sockaddr_in*)&sa[1]; 1223 if (si4[0]->sin_len != sizeof(*si4[0]) || 1224 si4[0]->sin_len != si4[1]->sin_len) 1225 return (EINVAL); 1226 inb = in_pcblookup_connect(&tcbtable, 1227 si4[0]->sin_addr, si4[0]->sin_port, 1228 si4[1]->sin_addr, si4[1]->sin_port); 1229 if (inb == NULL || (sockp = inb->inp_socket) == NULL) 1230 return (ESRCH); 1231 break; 1232 #endif /* INET */ 1233 #ifdef INET6 1234 case PF_INET6: 1235 si6[0] = (struct sockaddr_in6*)&sa[0]; 1236 si6[1] = (struct sockaddr_in6*)&sa[1]; 1237 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1238 si6[0]->sin6_len != si6[1]->sin6_len) 1239 return (EINVAL); 1240 in6b = in6_pcblookup_connect(&tcbtable, 1241 &si6[0]->sin6_addr, si6[0]->sin6_port, 1242 &si6[1]->sin6_addr, si6[1]->sin6_port, 0); 1243 if (in6b == NULL || (sockp = in6b->in6p_socket) == NULL) 1244 return (ESRCH); 1245 break; 1246 #endif /* INET6 */ 1247 default: 1248 return (EPROTONOSUPPORT); 1249 } 1250 *oldlenp = sizeof(uid); 1251 1252 uid = sockp->so_uidinfo->ui_uid; 1253 if (oldp) { 1254 sz = MIN(sizeof(uid), *oldlenp); 1255 error = copyout(&uid, oldp, sz); 1256 if (error) 1257 return (error); 1258 } 1259 *oldlenp = sizeof(uid); 1260 1261 return (0); 1262 } 1263 1264 /* 1265 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1266 * inet/inet6, as well as raw pcbs for each. specifically not 1267 * declared static so that raw sockets and udp/udp6 can use it as 1268 * well. 1269 */ 1270 int 1271 sysctl_inpcblist(SYSCTLFN_ARGS) 1272 { 1273 #ifdef INET 1274 struct sockaddr_in *in; 1275 const struct inpcb *inp; 1276 #endif 1277 #ifdef INET6 1278 struct sockaddr_in6 *in6; 1279 const struct in6pcb *in6p; 1280 #endif 1281 /* 1282 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1283 * struct inpcbtable pointer, so we have to discard const. :-/ 1284 */ 1285 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1286 const struct inpcb_hdr *inph; 1287 struct tcpcb *tp; 1288 struct kinfo_pcb pcb; 1289 char *dp; 1290 u_int op, arg; 1291 size_t len, needed, elem_size, out_size; 1292 int error, elem_count, pf, proto, pf2; 1293 1294 if (namelen != 4) 1295 return (EINVAL); 1296 1297 if (oldp != NULL) { 1298 len = *oldlenp; 1299 elem_size = name[2]; 1300 elem_count = name[3]; 1301 if (elem_size != sizeof(pcb)) 1302 return EINVAL; 1303 } else { 1304 len = 0; 1305 elem_count = INT_MAX; 1306 elem_size = sizeof(pcb); 1307 } 1308 error = 0; 1309 dp = oldp; 1310 op = name[0]; 1311 arg = name[1]; 1312 out_size = elem_size; 1313 needed = 0; 1314 1315 if (namelen == 1 && name[0] == CTL_QUERY) 1316 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1317 1318 if (name - oname != 4) 1319 return (EINVAL); 1320 1321 pf = oname[1]; 1322 proto = oname[2]; 1323 pf2 = (oldp != NULL) ? pf : 0; 1324 1325 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1326 #ifdef INET 1327 inp = (const struct inpcb *)inph; 1328 #endif 1329 #ifdef INET6 1330 in6p = (const struct in6pcb *)inph; 1331 #endif 1332 1333 if (inph->inph_af != pf) 1334 continue; 1335 1336 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1337 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1338 NULL) != 0) 1339 continue; 1340 1341 memset(&pcb, 0, sizeof(pcb)); 1342 1343 pcb.ki_family = pf; 1344 pcb.ki_type = proto; 1345 1346 switch (pf2) { 1347 case 0: 1348 /* just probing for size */ 1349 break; 1350 #ifdef INET 1351 case PF_INET: 1352 pcb.ki_family = inp->inp_socket->so_proto-> 1353 pr_domain->dom_family; 1354 pcb.ki_type = inp->inp_socket->so_proto-> 1355 pr_type; 1356 pcb.ki_protocol = inp->inp_socket->so_proto-> 1357 pr_protocol; 1358 pcb.ki_pflags = inp->inp_flags; 1359 1360 pcb.ki_sostate = inp->inp_socket->so_state; 1361 pcb.ki_prstate = inp->inp_state; 1362 if (proto == IPPROTO_TCP) { 1363 tp = intotcpcb(inp); 1364 pcb.ki_tstate = tp->t_state; 1365 pcb.ki_tflags = tp->t_flags; 1366 } 1367 1368 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1369 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1370 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1371 1372 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1373 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1374 1375 in = satosin(&pcb.ki_src); 1376 in->sin_len = sizeof(*in); 1377 in->sin_family = pf; 1378 in->sin_port = inp->inp_lport; 1379 in->sin_addr = inp->inp_laddr; 1380 if (pcb.ki_prstate >= INP_CONNECTED) { 1381 in = satosin(&pcb.ki_dst); 1382 in->sin_len = sizeof(*in); 1383 in->sin_family = pf; 1384 in->sin_port = inp->inp_fport; 1385 in->sin_addr = inp->inp_faddr; 1386 } 1387 break; 1388 #endif 1389 #ifdef INET6 1390 case PF_INET6: 1391 pcb.ki_family = in6p->in6p_socket->so_proto-> 1392 pr_domain->dom_family; 1393 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1394 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1395 pr_protocol; 1396 pcb.ki_pflags = in6p->in6p_flags; 1397 1398 pcb.ki_sostate = in6p->in6p_socket->so_state; 1399 pcb.ki_prstate = in6p->in6p_state; 1400 if (proto == IPPROTO_TCP) { 1401 tp = in6totcpcb(in6p); 1402 pcb.ki_tstate = tp->t_state; 1403 pcb.ki_tflags = tp->t_flags; 1404 } 1405 1406 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1407 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1408 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1409 1410 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1411 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1412 1413 in6 = satosin6(&pcb.ki_src); 1414 in6->sin6_len = sizeof(*in6); 1415 in6->sin6_family = pf; 1416 in6->sin6_port = in6p->in6p_lport; 1417 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1418 in6->sin6_addr = in6p->in6p_laddr; 1419 in6->sin6_scope_id = 0; /* XXX? */ 1420 1421 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1422 in6 = satosin6(&pcb.ki_dst); 1423 in6->sin6_len = sizeof(*in6); 1424 in6->sin6_family = pf; 1425 in6->sin6_port = in6p->in6p_fport; 1426 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1427 in6->sin6_addr = in6p->in6p_faddr; 1428 in6->sin6_scope_id = 0; /* XXX? */ 1429 } 1430 break; 1431 #endif 1432 } 1433 1434 if (len >= elem_size && elem_count > 0) { 1435 error = copyout(&pcb, dp, out_size); 1436 if (error) 1437 return (error); 1438 dp += elem_size; 1439 len -= elem_size; 1440 } 1441 if (elem_count > 0) { 1442 needed += elem_size; 1443 if (elem_count != INT_MAX) 1444 elem_count--; 1445 } 1446 } 1447 1448 *oldlenp = needed; 1449 if (oldp == NULL) 1450 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1451 1452 return (error); 1453 } 1454 1455 static int 1456 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1457 { 1458 struct sysctlnode node; 1459 int error, r; 1460 char newname[TCPCC_MAXLEN]; 1461 1462 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1463 1464 node = *rnode; 1465 node.sysctl_data = newname; 1466 node.sysctl_size = sizeof(newname); 1467 1468 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1469 1470 if (error || 1471 newp == NULL || 1472 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1473 return error; 1474 1475 if ((r = tcp_congctl_select(NULL, newname))) 1476 return r; 1477 1478 return error; 1479 } 1480 1481 static int 1482 sysctl_tcp_keep(SYSCTLFN_ARGS) 1483 { 1484 int error; 1485 u_int tmp; 1486 struct sysctlnode node; 1487 1488 node = *rnode; 1489 tmp = *(u_int *)rnode->sysctl_data; 1490 node.sysctl_data = &tmp; 1491 1492 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1493 if (error || newp == NULL) 1494 return error; 1495 1496 *(u_int *)rnode->sysctl_data = tmp; 1497 tcp_tcpcb_template(); /* update the template */ 1498 return 0; 1499 } 1500 1501 1502 /* 1503 * this (second stage) setup routine is a replacement for tcp_sysctl() 1504 * (which is currently used for ipv4 and ipv6) 1505 */ 1506 static void 1507 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1508 const char *tcpname) 1509 { 1510 const struct sysctlnode *sack_node; 1511 const struct sysctlnode *abc_node; 1512 const struct sysctlnode *ecn_node; 1513 const struct sysctlnode *congctl_node; 1514 #ifdef TCP_DEBUG 1515 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1516 extern int tcp_debx; 1517 #endif 1518 1519 sysctl_createv(clog, 0, NULL, NULL, 1520 CTLFLAG_PERMANENT, 1521 CTLTYPE_NODE, "net", NULL, 1522 NULL, 0, NULL, 0, 1523 CTL_NET, CTL_EOL); 1524 sysctl_createv(clog, 0, NULL, NULL, 1525 CTLFLAG_PERMANENT, 1526 CTLTYPE_NODE, pfname, NULL, 1527 NULL, 0, NULL, 0, 1528 CTL_NET, pf, CTL_EOL); 1529 sysctl_createv(clog, 0, NULL, NULL, 1530 CTLFLAG_PERMANENT, 1531 CTLTYPE_NODE, tcpname, 1532 SYSCTL_DESCR("TCP related settings"), 1533 NULL, 0, NULL, 0, 1534 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1535 1536 sysctl_createv(clog, 0, NULL, NULL, 1537 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1538 CTLTYPE_INT, "rfc1323", 1539 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1540 NULL, 0, &tcp_do_rfc1323, 0, 1541 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1542 sysctl_createv(clog, 0, NULL, NULL, 1543 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1544 CTLTYPE_INT, "sendspace", 1545 SYSCTL_DESCR("Default TCP send buffer size"), 1546 NULL, 0, &tcp_sendspace, 0, 1547 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1548 sysctl_createv(clog, 0, NULL, NULL, 1549 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1550 CTLTYPE_INT, "recvspace", 1551 SYSCTL_DESCR("Default TCP receive buffer size"), 1552 NULL, 0, &tcp_recvspace, 0, 1553 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1554 sysctl_createv(clog, 0, NULL, NULL, 1555 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1556 CTLTYPE_INT, "mssdflt", 1557 SYSCTL_DESCR("Default maximum segment size"), 1558 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1559 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1560 sysctl_createv(clog, 0, NULL, NULL, 1561 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1562 CTLTYPE_INT, "syn_cache_limit", 1563 SYSCTL_DESCR("Maximum number of entries in the TCP " 1564 "compressed state engine"), 1565 NULL, 0, &tcp_syn_cache_limit, 0, 1566 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1567 CTL_EOL); 1568 sysctl_createv(clog, 0, NULL, NULL, 1569 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1570 CTLTYPE_INT, "syn_bucket_limit", 1571 SYSCTL_DESCR("Maximum number of entries per hash " 1572 "bucket in the TCP compressed state " 1573 "engine"), 1574 NULL, 0, &tcp_syn_bucket_limit, 0, 1575 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1576 CTL_EOL); 1577 #if 0 /* obsoleted */ 1578 sysctl_createv(clog, 0, NULL, NULL, 1579 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1580 CTLTYPE_INT, "syn_cache_interval", 1581 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1582 NULL, 0, &tcp_syn_cache_interval, 0, 1583 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1584 CTL_EOL); 1585 #endif 1586 sysctl_createv(clog, 0, NULL, NULL, 1587 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1588 CTLTYPE_INT, "init_win", 1589 SYSCTL_DESCR("Initial TCP congestion window"), 1590 NULL, 0, &tcp_init_win, 0, 1591 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1592 sysctl_createv(clog, 0, NULL, NULL, 1593 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1594 CTLTYPE_INT, "mss_ifmtu", 1595 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1596 NULL, 0, &tcp_mss_ifmtu, 0, 1597 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1598 sysctl_createv(clog, 0, NULL, &sack_node, 1599 CTLFLAG_PERMANENT, 1600 CTLTYPE_NODE, "sack", 1601 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1602 NULL, 0, NULL, 0, 1603 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1604 1605 /* Congctl subtree */ 1606 sysctl_createv(clog, 0, NULL, &congctl_node, 1607 CTLFLAG_PERMANENT, 1608 CTLTYPE_NODE, "congctl", 1609 SYSCTL_DESCR("TCP Congestion Control"), 1610 NULL, 0, NULL, 0, 1611 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1612 sysctl_createv(clog, 0, &congctl_node, NULL, 1613 CTLFLAG_PERMANENT, 1614 CTLTYPE_STRING, "available", 1615 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1616 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1617 sysctl_createv(clog, 0, &congctl_node, NULL, 1618 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1619 CTLTYPE_STRING, "selected", 1620 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1621 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1622 CTL_CREATE, CTL_EOL); 1623 1624 sysctl_createv(clog, 0, NULL, NULL, 1625 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1626 CTLTYPE_INT, "win_scale", 1627 SYSCTL_DESCR("Use RFC1323 window scale options"), 1628 NULL, 0, &tcp_do_win_scale, 0, 1629 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1630 sysctl_createv(clog, 0, NULL, NULL, 1631 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1632 CTLTYPE_INT, "timestamps", 1633 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1634 NULL, 0, &tcp_do_timestamps, 0, 1635 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1636 sysctl_createv(clog, 0, NULL, NULL, 1637 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1638 CTLTYPE_INT, "compat_42", 1639 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1640 NULL, 0, &tcp_compat_42, 0, 1641 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1642 sysctl_createv(clog, 0, NULL, NULL, 1643 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1644 CTLTYPE_INT, "cwm", 1645 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1646 "Monitoring"), 1647 NULL, 0, &tcp_cwm, 0, 1648 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1649 sysctl_createv(clog, 0, NULL, NULL, 1650 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1651 CTLTYPE_INT, "cwm_burstsize", 1652 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1653 "burst count in packets"), 1654 NULL, 0, &tcp_cwm_burstsize, 0, 1655 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1656 CTL_EOL); 1657 sysctl_createv(clog, 0, NULL, NULL, 1658 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1659 CTLTYPE_INT, "ack_on_push", 1660 SYSCTL_DESCR("Immediately return ACK when PSH is " 1661 "received"), 1662 NULL, 0, &tcp_ack_on_push, 0, 1663 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1664 sysctl_createv(clog, 0, NULL, NULL, 1665 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1666 CTLTYPE_INT, "keepidle", 1667 SYSCTL_DESCR("Allowed connection idle ticks before a " 1668 "keepalive probe is sent"), 1669 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1670 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1671 sysctl_createv(clog, 0, NULL, NULL, 1672 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1673 CTLTYPE_INT, "keepintvl", 1674 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1675 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1676 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1677 sysctl_createv(clog, 0, NULL, NULL, 1678 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1679 CTLTYPE_INT, "keepcnt", 1680 SYSCTL_DESCR("Number of keepalive probes to send"), 1681 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1682 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1683 sysctl_createv(clog, 0, NULL, NULL, 1684 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1685 CTLTYPE_INT, "slowhz", 1686 SYSCTL_DESCR("Keepalive ticks per second"), 1687 NULL, PR_SLOWHZ, NULL, 0, 1688 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1689 sysctl_createv(clog, 0, NULL, NULL, 1690 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1691 CTLTYPE_INT, "log_refused", 1692 SYSCTL_DESCR("Log refused TCP connections"), 1693 NULL, 0, &tcp_log_refused, 0, 1694 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1695 #if 0 /* obsoleted */ 1696 sysctl_createv(clog, 0, NULL, NULL, 1697 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1698 CTLTYPE_INT, "rstratelimit", NULL, 1699 NULL, 0, &tcp_rst_ratelim, 0, 1700 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1701 #endif 1702 sysctl_createv(clog, 0, NULL, NULL, 1703 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1704 CTLTYPE_INT, "rstppslimit", 1705 SYSCTL_DESCR("Maximum number of RST packets to send " 1706 "per second"), 1707 NULL, 0, &tcp_rst_ppslim, 0, 1708 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1709 sysctl_createv(clog, 0, NULL, NULL, 1710 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1711 CTLTYPE_INT, "delack_ticks", 1712 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1713 NULL, 0, &tcp_delack_ticks, 0, 1714 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1715 sysctl_createv(clog, 0, NULL, NULL, 1716 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1717 CTLTYPE_INT, "init_win_local", 1718 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1719 NULL, 0, &tcp_init_win_local, 0, 1720 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1721 CTL_EOL); 1722 sysctl_createv(clog, 0, NULL, NULL, 1723 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1724 CTLTYPE_STRUCT, "ident", 1725 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1726 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1727 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1728 sysctl_createv(clog, 0, NULL, NULL, 1729 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1730 CTLTYPE_INT, "do_loopback_cksum", 1731 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1732 NULL, 0, &tcp_do_loopback_cksum, 0, 1733 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1734 CTL_EOL); 1735 sysctl_createv(clog, 0, NULL, NULL, 1736 CTLFLAG_PERMANENT, 1737 CTLTYPE_STRUCT, "pcblist", 1738 SYSCTL_DESCR("TCP protocol control block list"), 1739 sysctl_inpcblist, 0, &tcbtable, 0, 1740 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1741 CTL_EOL); 1742 sysctl_createv(clog, 0, NULL, NULL, 1743 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1744 CTLTYPE_INT, "keepinit", 1745 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1746 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1747 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1748 1749 /* ECN subtree */ 1750 sysctl_createv(clog, 0, NULL, &ecn_node, 1751 CTLFLAG_PERMANENT, 1752 CTLTYPE_NODE, "ecn", 1753 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1754 NULL, 0, NULL, 0, 1755 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1756 sysctl_createv(clog, 0, &ecn_node, NULL, 1757 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1758 CTLTYPE_INT, "enable", 1759 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1760 "Notification"), 1761 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1762 sysctl_createv(clog, 0, &ecn_node, NULL, 1763 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1764 CTLTYPE_INT, "maxretries", 1765 SYSCTL_DESCR("Number of times to retry ECN setup " 1766 "before disabling ECN on the connection"), 1767 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1768 1769 /* SACK gets it's own little subtree. */ 1770 sysctl_createv(clog, 0, NULL, &sack_node, 1771 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1772 CTLTYPE_INT, "enable", 1773 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1774 NULL, 0, &tcp_do_sack, 0, 1775 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1776 sysctl_createv(clog, 0, NULL, &sack_node, 1777 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1778 CTLTYPE_INT, "maxholes", 1779 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1780 NULL, 0, &tcp_sack_tp_maxholes, 0, 1781 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1782 sysctl_createv(clog, 0, NULL, &sack_node, 1783 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1784 CTLTYPE_INT, "globalmaxholes", 1785 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1786 NULL, 0, &tcp_sack_globalmaxholes, 0, 1787 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1788 sysctl_createv(clog, 0, NULL, &sack_node, 1789 CTLFLAG_PERMANENT, 1790 CTLTYPE_INT, "globalholes", 1791 SYSCTL_DESCR("Global number of TCP SACK holes"), 1792 NULL, 0, &tcp_sack_globalholes, 0, 1793 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1794 1795 sysctl_createv(clog, 0, NULL, NULL, 1796 CTLFLAG_PERMANENT, 1797 CTLTYPE_STRUCT, "stats", 1798 SYSCTL_DESCR("TCP statistics"), 1799 NULL, 0, &tcpstat, sizeof(tcpstat), 1800 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1801 CTL_EOL); 1802 #ifdef TCP_DEBUG 1803 sysctl_createv(clog, 0, NULL, NULL, 1804 CTLFLAG_PERMANENT, 1805 CTLTYPE_STRUCT, "debug", 1806 SYSCTL_DESCR("TCP sockets debug information"), 1807 NULL, 0, &tcp_debug, sizeof(tcp_debug), 1808 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 1809 CTL_EOL); 1810 sysctl_createv(clog, 0, NULL, NULL, 1811 CTLFLAG_PERMANENT, 1812 CTLTYPE_INT, "debx", 1813 SYSCTL_DESCR("Number of TCP debug sockets messages"), 1814 NULL, 0, &tcp_debx, sizeof(tcp_debx), 1815 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 1816 CTL_EOL); 1817 #endif 1818 #if NRND > 0 1819 sysctl_createv(clog, 0, NULL, NULL, 1820 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1821 CTLTYPE_INT, "iss_hash", 1822 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 1823 "hash computation"), 1824 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 1825 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1826 CTL_EOL); 1827 #endif 1828 1829 /* ABC subtree */ 1830 1831 sysctl_createv(clog, 0, NULL, &abc_node, 1832 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 1833 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 1834 NULL, 0, NULL, 0, 1835 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1836 sysctl_createv(clog, 0, &abc_node, NULL, 1837 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1838 CTLTYPE_INT, "enable", 1839 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 1840 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 1841 sysctl_createv(clog, 0, &abc_node, NULL, 1842 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1843 CTLTYPE_INT, "aggressive", 1844 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 1845 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 1846 } 1847 1848 /* 1849 * Sysctl for tcp variables. 1850 */ 1851 #ifdef INET 1852 SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup") 1853 { 1854 1855 sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp"); 1856 } 1857 #endif /* INET */ 1858 1859 #ifdef INET6 1860 SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup") 1861 { 1862 1863 sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6"); 1864 } 1865 #endif /* INET6 */ 1866
Indexes created Sun Sep 21 20:09:37 GMT 2025