1 /* $NetBSD: trpt.c,v 1.28 2018/05/03 07:13:49 maxv Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 2005, 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1983, 1988, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 #include <sys/cdefs.h> 63 #ifndef lint 64 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\ 65 The Regents of the University of California. All rights reserved."); 66 #endif /* not lint */ 67 68 #ifndef lint 69 #if 0 70 static char sccsid[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93"; 71 #else 72 __RCSID("$NetBSD: trpt.c,v 1.28 2018/05/03 07:13:49 maxv Exp $"); 73 #endif 74 #endif /* not lint */ 75 76 #define _CALLOUT_PRIVATE /* for defs in sys/callout.h */ 77 78 #include <sys/param.h> 79 #include <sys/queue.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/sysctl.h> 83 #define PRUREQUESTS 84 #include <sys/protosw.h> 85 #include <sys/file.h> 86 87 #include <net/route.h> 88 #include <net/if.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/ip_var.h> 95 96 #ifdef INET6 97 #ifndef INET 98 #include <netinet/in.h> 99 #endif 100 #include <netinet/ip6.h> 101 #endif 102 103 #include <netinet/tcp.h> 104 #define TCPSTATES 105 #include <netinet/tcp_fsm.h> 106 #include <netinet/tcp_seq.h> 107 #define TCPTIMERS 108 #include <netinet/tcp_timer.h> 109 #include <netinet/tcp_var.h> 110 #define TANAMES 111 #include <netinet/tcp_debug.h> 112 113 #include <arpa/inet.h> 114 115 #include <err.h> 116 #include <stdio.h> 117 #include <errno.h> 118 #include <kvm.h> 119 #include <nlist.h> 120 #include <paths.h> 121 #include <limits.h> 122 #include <stdlib.h> 123 #include <unistd.h> 124 125 static struct nlist nl[] = { 126 #define N_HARDCLOCK_TICKS 0 127 { "_hardclock_ticks", 0, 0, 0, 0 }, 128 #define N_TCP_DEBUG 1 129 { "_tcp_debug", 0, 0, 0, 0 }, 130 #define N_TCP_DEBX 2 131 { "_tcp_debx", 0, 0, 0, 0 }, 132 { NULL, 0, 0, 0, 0 }, 133 }; 134 135 static caddr_t tcp_pcbs[TCP_NDEBUG]; 136 static n_time ntime; 137 static int aflag, follow, sflag, tflag; 138 139 /* see sys/netinet/tcp_debug.c */ 140 static struct tcp_debug tcp_debug[TCP_NDEBUG]; 141 static int tcp_debx; 142 143 static void dotrace(caddr_t); 144 static void tcp_trace(short, short, struct tcpcb *, struct tcpcb *, 145 int, void *, int); 146 static int numeric(const void *, const void *); 147 __dead static void usage(void); 148 149 static kvm_t *kd; 150 static int use_sysctl; 151 152 int 153 main(int argc, char *argv[]) 154 { 155 int ch, i, jflag, npcbs; 156 char *kernel, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 157 unsigned long l; 158 159 jflag = npcbs = 0; 160 kernel = core = NULL; 161 162 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 163 switch (ch) { 164 case 'a': 165 ++aflag; 166 break; 167 case 'f': 168 ++follow; 169 setlinebuf(stdout); 170 break; 171 case 'j': 172 ++jflag; 173 break; 174 case 'p': 175 if (npcbs >= TCP_NDEBUG) 176 errx(1, "too many pcbs specified"); 177 errno = 0; 178 cp = NULL; 179 l = strtoul(optarg, &cp, 16); 180 tcp_pcbs[npcbs] = (caddr_t)l; 181 if (*optarg == '\0' || *cp != '\0' || errno || 182 (unsigned long)tcp_pcbs[npcbs] != l) 183 errx(1, "invalid address: %s", optarg); 184 npcbs++; 185 break; 186 case 's': 187 ++sflag; 188 break; 189 case 't': 190 ++tflag; 191 break; 192 case 'N': 193 kernel = optarg; 194 break; 195 case 'M': 196 core = optarg; 197 break; 198 default: 199 usage(); 200 /* NOTREACHED */ 201 } 202 } 203 argc -= optind; 204 argv += optind; 205 206 if (argc) 207 usage(); 208 209 use_sysctl = (kernel == NULL && core == NULL); 210 211 if (use_sysctl) { 212 size_t lenx = sizeof(tcp_debx); 213 size_t lend = sizeof(tcp_debug); 214 215 if (sysctlbyname("net.inet.tcp.debx", &tcp_debx, &lenx, 216 NULL, 0) == -1) 217 err(1, "net.inet.tcp.debx"); 218 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, &lend, 219 NULL, 0) == -1) 220 err(1, "net.inet.tcp.debug"); 221 } else { 222 kd = kvm_openfiles(kernel, core, NULL, O_RDONLY, errbuf); 223 if (kd == NULL) 224 errx(1, "can't open kmem: %s", errbuf); 225 226 if (kvm_nlist(kd, nl)) 227 errx(2, "%s: no namelist", kernel); 228 229 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 230 sizeof(tcp_debx)) != sizeof(tcp_debx)) 231 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 232 233 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 234 sizeof(tcp_debug)) != sizeof(tcp_debug)) 235 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 236 } 237 238 /* 239 * If no control blocks have been specified, figure 240 * out how many distinct one we have and summarize 241 * them in tcp_pcbs for sorting the trace records 242 * below. 243 */ 244 if (npcbs == 0) { 245 for (i = 0; i < TCP_NDEBUG; i++) { 246 struct tcp_debug *td = &tcp_debug[i]; 247 int j; 248 249 if (td->td_tcb == 0) 250 continue; 251 for (j = 0; j < npcbs; j++) 252 if (tcp_pcbs[j] == td->td_tcb) 253 break; 254 if (j >= npcbs) 255 tcp_pcbs[npcbs++] = td->td_tcb; 256 } 257 if (npcbs == 0) 258 exit(0); 259 } 260 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 261 if (jflag) { 262 for (i = 0;;) { 263 printf("%lx", (long)tcp_pcbs[i]); 264 if (++i == npcbs) 265 break; 266 fputs(", ", stdout); 267 } 268 putchar('\n'); 269 } else { 270 for (i = 0; i < npcbs; i++) { 271 printf("\n%lx:\n", (long)tcp_pcbs[i]); 272 dotrace(tcp_pcbs[i]); 273 } 274 } 275 exit(0); 276 } 277 278 static void 279 dotrace(caddr_t tcpcb) 280 { 281 struct tcp_debug *td; 282 int prev_debx = tcp_debx; 283 int i; 284 285 again: 286 if (--tcp_debx < 0) 287 tcp_debx = TCP_NDEBUG - 1; 288 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 289 td = &tcp_debug[i]; 290 if (tcpcb && td->td_tcb != tcpcb) 291 continue; 292 ntime = ntohl(td->td_time); 293 switch (td->td_family) { 294 case AF_INET: 295 tcp_trace(td->td_act, td->td_ostate, 296 (struct tcpcb *)td->td_tcb, &td->td_cb, 297 td->td_family, &td->td_ti, td->td_req); 298 break; 299 #ifdef INET6 300 case AF_INET6: 301 tcp_trace(td->td_act, td->td_ostate, 302 (struct tcpcb *)td->td_tcb, &td->td_cb, 303 td->td_family, &td->td_ti6, td->td_req); 304 break; 305 #endif 306 default: 307 tcp_trace(td->td_act, td->td_ostate, 308 (struct tcpcb *)td->td_tcb, &td->td_cb, 309 td->td_family, NULL, td->td_req); 310 break; 311 } 312 if (i == tcp_debx) 313 goto done; 314 } 315 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 316 td = &tcp_debug[i]; 317 if (tcpcb && td->td_tcb != tcpcb) 318 continue; 319 ntime = ntohl(td->td_time); 320 switch (td->td_family) { 321 case AF_INET: 322 tcp_trace(td->td_act, td->td_ostate, 323 (struct tcpcb *)td->td_tcb, &td->td_cb, 324 td->td_family, &td->td_ti, td->td_req); 325 break; 326 #ifdef INET6 327 case AF_INET6: 328 tcp_trace(td->td_act, td->td_ostate, 329 (struct tcpcb *)td->td_tcb, &td->td_cb, 330 td->td_family, &td->td_ti6, td->td_req); 331 break; 332 #endif 333 default: 334 tcp_trace(td->td_act, td->td_ostate, 335 (struct tcpcb *)td->td_tcb, &td->td_cb, 336 td->td_family, NULL, td->td_req); 337 break; 338 } 339 } 340 done: 341 if (follow) { 342 prev_debx = tcp_debx + 1; 343 if (prev_debx >= TCP_NDEBUG) 344 prev_debx = 0; 345 do { 346 sleep(1); 347 if (use_sysctl) { 348 size_t len = sizeof(tcp_debx); 349 350 if (sysctlbyname("net.inet.tcp.debx", 351 &tcp_debx, &len, NULL, 0) == -1) 352 err(1, "net.inet.tcp.debx"); 353 } else 354 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 355 (char *)&tcp_debx, sizeof(tcp_debx)) != 356 sizeof(tcp_debx)) 357 errx(3, "tcp_debx: %s", 358 kvm_geterr(kd)); 359 } while (tcp_debx == prev_debx); 360 361 if (use_sysctl) { 362 size_t len = sizeof(tcp_debug); 363 364 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, 365 &len, NULL, 0) == -1) 366 err(1, "net.inet.tcp.debug"); 367 } else 368 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, 369 (char *)tcp_debug, 370 sizeof(tcp_debug)) != sizeof(tcp_debug)) 371 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 372 373 goto again; 374 } 375 } 376 377 /* 378 * Tcp debug routines 379 */ 380 /*ARGSUSED*/ 381 static void 382 tcp_trace(short act, short ostate, struct tcpcb *atp, struct tcpcb *tp, 383 int family, void *packet, int req) 384 { 385 tcp_seq seq, ack; 386 int flags, len, win, timer; 387 struct tcphdr *th = NULL; 388 struct ip *ip = NULL; 389 #ifdef INET6 390 struct ip6_hdr *ip6 = NULL; 391 #endif 392 callout_impl_t *ci; 393 char hbuf[MAXHOSTNAMELEN]; 394 395 len = 0; /* XXXGCC -Wuninitialized */ 396 397 switch (family) { 398 case AF_INET: 399 if (packet) { 400 ip = (struct ip *)packet; 401 th = (struct tcphdr *)(ip + 1); 402 } 403 break; 404 #ifdef INET6 405 case AF_INET6: 406 if (packet) { 407 ip6 = (struct ip6_hdr *)packet; 408 th = (struct tcphdr *)(ip6 + 1); 409 } 410 break; 411 #endif 412 default: 413 return; 414 } 415 416 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 417 tanames[act]); 418 419 #ifndef INET6 420 if (!ip) 421 #else 422 if (!(ip || ip6)) 423 #endif 424 goto skipact; 425 426 switch (act) { 427 case TA_INPUT: 428 case TA_OUTPUT: 429 case TA_DROP: 430 if (aflag) { 431 inet_ntop(family, 432 #ifndef INET6 433 (void *)&ip->ip_src, 434 #else 435 family == AF_INET ? (void *)&ip->ip_src 436 : (void *)&ip6->ip6_src, 437 #endif 438 hbuf, sizeof(hbuf)); 439 printf("(src=%s,%u, ", 440 hbuf, ntohs(th->th_sport)); 441 inet_ntop(family, 442 #ifndef INET6 443 (void *)&ip->ip_dst, 444 #else 445 family == AF_INET ? (void *)&ip->ip_dst 446 : (void *)&ip6->ip6_dst, 447 #endif 448 hbuf, sizeof(hbuf)); 449 printf("dst=%s,%u)", 450 hbuf, ntohs(th->th_dport)); 451 } 452 seq = th->th_seq; 453 ack = th->th_ack; 454 if (ip) 455 len = ip->ip_len; 456 #ifdef INET6 457 else if (ip6) 458 len = ip6->ip6_plen; 459 #endif 460 win = th->th_win; 461 if (act == TA_OUTPUT) { 462 NTOHL(seq); 463 NTOHL(ack); 464 NTOHS(len); 465 NTOHS(win); 466 } 467 if (act == TA_OUTPUT) 468 len -= sizeof(struct tcphdr); 469 if (len) 470 printf("[%x..%x)", seq, seq + len); 471 else 472 printf("%x", seq); 473 printf("@%x", ack); 474 if (win) 475 printf("(win=%x)", win); 476 flags = th->th_flags; 477 if (flags) { 478 const char *cp = "<"; 479 #define pf(flag, string) { \ 480 if (th->th_flags&flag) { \ 481 (void)printf("%s%s", cp, string); \ 482 cp = ","; \ 483 } \ 484 } 485 pf(TH_SYN, "SYN"); 486 pf(TH_ACK, "ACK"); 487 pf(TH_FIN, "FIN"); 488 pf(TH_RST, "RST"); 489 pf(TH_PUSH, "PUSH"); 490 pf(TH_URG, "URG"); 491 pf(TH_CWR, "CWR"); 492 pf(TH_ECE, "ECE"); 493 printf(">"); 494 } 495 break; 496 case TA_USER: 497 timer = req >> 8; 498 req &= 0xff; 499 printf("%s", prurequests[req]); 500 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 501 printf("<%s>", tcptimers[timer]); 502 break; 503 } 504 505 skipact: 506 printf(" -> %s", tcpstates[tp->t_state]); 507 /* print out internal state of tp !?! */ 508 printf("\n"); 509 if (sflag) { 510 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 511 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 512 tp->snd_max); 513 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 514 tp->snd_wl2, tp->snd_wnd); 515 } 516 /* print out timers? */ 517 if (tflag) { 518 const char *cp = "\t"; 519 int i; 520 int hardticks; 521 522 if (use_sysctl) { 523 size_t hlen = sizeof(hardticks); 524 525 if (sysctlbyname("kern.hardclock_ticks", &hardticks, 526 &hlen, NULL, 0) == -1) 527 err(1, "kern.hardclock_ticks"); 528 } else { 529 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 530 (char *)&hardticks, 531 sizeof(hardticks)) != sizeof(hardticks)) 532 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 533 534 for (i = 0; i < TCPT_NTIMERS; i++) { 535 ci = (callout_impl_t *)&tp->t_timer[i]; 536 if ((ci->c_flags & CALLOUT_PENDING) == 0) 537 continue; 538 printf("%s%s=%d", cp, tcptimers[i], 539 ci->c_time - hardticks); 540 if (i == TCPT_REXMT) 541 printf(" (t_rxtshft=%d)", 542 tp->t_rxtshift); 543 cp = ", "; 544 } 545 if (*cp != '\t') 546 putchar('\n'); 547 } 548 } 549 } 550 551 static int 552 numeric(const void *v1, const void *v2) 553 { 554 const caddr_t *c1 = v1; 555 const caddr_t *c2 = v2; 556 int rv; 557 558 if (*c1 < *c2) 559 rv = -1; 560 else if (*c1 > *c2) 561 rv = 1; 562 else 563 rv = 0; 564 565 return (rv); 566 } 567 568 static void 569 usage(void) 570 { 571 572 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 573 " [-N system] [-M core]\n", getprogname()); 574 exit(1); 575 } 576
Indexes created Sun Sep 21 20:09:37 GMT 2025