trpt.c revision 1.27
1 /* $NetBSD: trpt.c,v 1.27 2011/08/30 20:49:29 joerg 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 1.27 2011/08/30 20:49:29 joerg 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 #include <netinet/tcpip.h> 111 #define TANAMES 112 #include <netinet/tcp_debug.h> 113 114 #include <arpa/inet.h> 115 116 #include <err.h> 117 #include <stdio.h> 118 #include <errno.h> 119 #include <kvm.h> 120 #include <nlist.h> 121 #include <paths.h> 122 #include <limits.h> 123 #include <stdlib.h> 124 #include <unistd.h> 125 126 static struct nlist nl[] = { 127 #define N_HARDCLOCK_TICKS 0 128 { "_hardclock_ticks", 0, 0, 0, 0 }, 129 #define N_TCP_DEBUG 1 130 { "_tcp_debug", 0, 0, 0, 0 }, 131 #define N_TCP_DEBX 2 132 { "_tcp_debx", 0, 0, 0, 0 }, 133 { NULL, 0, 0, 0, 0 }, 134 }; 135 136 static caddr_t tcp_pcbs[TCP_NDEBUG]; 137 static n_time ntime; 138 static int aflag, follow, sflag, tflag; 139 140 /* see sys/netinet/tcp_debug.c */ 141 static struct tcp_debug tcp_debug[TCP_NDEBUG]; 142 static int tcp_debx; 143 144 static void dotrace(caddr_t); 145 static void tcp_trace(short, short, struct tcpcb *, struct tcpcb *, 146 int, void *, int); 147 static int numeric(const void *, const void *); 148 __dead static void usage(void); 149 150 static kvm_t *kd; 151 static int use_sysctl; 152 153 int 154 main(int argc, char *argv[]) 155 { 156 int ch, i, jflag, npcbs; 157 char *kernel, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 158 unsigned long l; 159 160 jflag = npcbs = 0; 161 kernel = core = NULL; 162 163 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 164 switch (ch) { 165 case 'a': 166 ++aflag; 167 break; 168 case 'f': 169 ++follow; 170 setlinebuf(stdout); 171 break; 172 case 'j': 173 ++jflag; 174 break; 175 case 'p': 176 if (npcbs >= TCP_NDEBUG) 177 errx(1, "too many pcbs specified"); 178 errno = 0; 179 cp = NULL; 180 l = strtoul(optarg, &cp, 16); 181 tcp_pcbs[npcbs] = (caddr_t)l; 182 if (*optarg == '\0' || *cp != '\0' || errno || 183 (unsigned long)tcp_pcbs[npcbs] != l) 184 errx(1, "invalid address: %s", optarg); 185 npcbs++; 186 break; 187 case 's': 188 ++sflag; 189 break; 190 case 't': 191 ++tflag; 192 break; 193 case 'N': 194 kernel = optarg; 195 break; 196 case 'M': 197 core = optarg; 198 break; 199 default: 200 usage(); 201 /* NOTREACHED */ 202 } 203 } 204 argc -= optind; 205 argv += optind; 206 207 if (argc) 208 usage(); 209 210 use_sysctl = (kernel == NULL && core == NULL); 211 212 if (use_sysctl) { 213 size_t lenx = sizeof(tcp_debx); 214 size_t lend = sizeof(tcp_debug); 215 216 if (sysctlbyname("net.inet.tcp.debx", &tcp_debx, &lenx, 217 NULL, 0) == -1) 218 err(1, "net.inet.tcp.debx"); 219 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, &lend, 220 NULL, 0) == -1) 221 err(1, "net.inet.tcp.debug"); 222 } else { 223 kd = kvm_openfiles(kernel, core, NULL, O_RDONLY, errbuf); 224 if (kd == NULL) 225 errx(1, "can't open kmem: %s", errbuf); 226 227 if (kvm_nlist(kd, nl)) 228 errx(2, "%s: no namelist", kernel); 229 230 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 231 sizeof(tcp_debx)) != sizeof(tcp_debx)) 232 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 233 234 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 235 sizeof(tcp_debug)) != sizeof(tcp_debug)) 236 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 237 } 238 239 /* 240 * If no control blocks have been specified, figure 241 * out how many distinct one we have and summarize 242 * them in tcp_pcbs for sorting the trace records 243 * below. 244 */ 245 if (npcbs == 0) { 246 for (i = 0; i < TCP_NDEBUG; i++) { 247 struct tcp_debug *td = &tcp_debug[i]; 248 int j; 249 250 if (td->td_tcb == 0) 251 continue; 252 for (j = 0; j < npcbs; j++) 253 if (tcp_pcbs[j] == td->td_tcb) 254 break; 255 if (j >= npcbs) 256 tcp_pcbs[npcbs++] = td->td_tcb; 257 } 258 if (npcbs == 0) 259 exit(0); 260 } 261 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 262 if (jflag) { 263 for (i = 0;;) { 264 printf("%lx", (long)tcp_pcbs[i]); 265 if (++i == npcbs) 266 break; 267 fputs(", ", stdout); 268 } 269 putchar('\n'); 270 } else { 271 for (i = 0; i < npcbs; i++) { 272 printf("\n%lx:\n", (long)tcp_pcbs[i]); 273 dotrace(tcp_pcbs[i]); 274 } 275 } 276 exit(0); 277 } 278 279 static void 280 dotrace(caddr_t tcpcb) 281 { 282 struct tcp_debug *td; 283 int prev_debx = tcp_debx; 284 int i; 285 286 again: 287 if (--tcp_debx < 0) 288 tcp_debx = TCP_NDEBUG - 1; 289 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 290 td = &tcp_debug[i]; 291 if (tcpcb && td->td_tcb != tcpcb) 292 continue; 293 ntime = ntohl(td->td_time); 294 switch (td->td_family) { 295 case AF_INET: 296 tcp_trace(td->td_act, td->td_ostate, 297 (struct tcpcb *)td->td_tcb, &td->td_cb, 298 td->td_family, &td->td_ti, td->td_req); 299 break; 300 #ifdef INET6 301 case AF_INET6: 302 tcp_trace(td->td_act, td->td_ostate, 303 (struct tcpcb *)td->td_tcb, &td->td_cb, 304 td->td_family, &td->td_ti6, td->td_req); 305 break; 306 #endif 307 default: 308 tcp_trace(td->td_act, td->td_ostate, 309 (struct tcpcb *)td->td_tcb, &td->td_cb, 310 td->td_family, NULL, td->td_req); 311 break; 312 } 313 if (i == tcp_debx) 314 goto done; 315 } 316 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 317 td = &tcp_debug[i]; 318 if (tcpcb && td->td_tcb != tcpcb) 319 continue; 320 ntime = ntohl(td->td_time); 321 switch (td->td_family) { 322 case AF_INET: 323 tcp_trace(td->td_act, td->td_ostate, 324 (struct tcpcb *)td->td_tcb, &td->td_cb, 325 td->td_family, &td->td_ti, td->td_req); 326 break; 327 #ifdef INET6 328 case AF_INET6: 329 tcp_trace(td->td_act, td->td_ostate, 330 (struct tcpcb *)td->td_tcb, &td->td_cb, 331 td->td_family, &td->td_ti6, td->td_req); 332 break; 333 #endif 334 default: 335 tcp_trace(td->td_act, td->td_ostate, 336 (struct tcpcb *)td->td_tcb, &td->td_cb, 337 td->td_family, NULL, td->td_req); 338 break; 339 } 340 } 341 done: 342 if (follow) { 343 prev_debx = tcp_debx + 1; 344 if (prev_debx >= TCP_NDEBUG) 345 prev_debx = 0; 346 do { 347 sleep(1); 348 if (use_sysctl) { 349 size_t len = sizeof(tcp_debx); 350 351 if (sysctlbyname("net.inet.tcp.debx", 352 &tcp_debx, &len, NULL, 0) == -1) 353 err(1, "net.inet.tcp.debx"); 354 } else 355 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 356 (char *)&tcp_debx, sizeof(tcp_debx)) != 357 sizeof(tcp_debx)) 358 errx(3, "tcp_debx: %s", 359 kvm_geterr(kd)); 360 } while (tcp_debx == prev_debx); 361 362 if (use_sysctl) { 363 size_t len = sizeof(tcp_debug); 364 365 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, 366 &len, NULL, 0) == -1) 367 err(1, "net.inet.tcp.debug"); 368 } else 369 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, 370 (char *)tcp_debug, 371 sizeof(tcp_debug)) != sizeof(tcp_debug)) 372 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 373 374 goto again; 375 } 376 } 377 378 /* 379 * Tcp debug routines 380 */ 381 /*ARGSUSED*/ 382 static void 383 tcp_trace(short act, short ostate, struct tcpcb *atp, struct tcpcb *tp, 384 int family, void *packet, int req) 385 { 386 tcp_seq seq, ack; 387 int flags, len, win, timer; 388 struct tcphdr *th = NULL; 389 struct ip *ip = NULL; 390 #ifdef INET6 391 struct ip6_hdr *ip6 = NULL; 392 #endif 393 callout_impl_t *ci; 394 char hbuf[MAXHOSTNAMELEN]; 395 396 len = 0; /* XXXGCC -Wuninitialized */ 397 398 switch (family) { 399 case AF_INET: 400 if (packet) { 401 ip = (struct ip *)packet; 402 th = (struct tcphdr *)(ip + 1); 403 } 404 break; 405 #ifdef INET6 406 case AF_INET6: 407 if (packet) { 408 ip6 = (struct ip6_hdr *)packet; 409 th = (struct tcphdr *)(ip6 + 1); 410 } 411 break; 412 #endif 413 default: 414 return; 415 } 416 417 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 418 tanames[act]); 419 420 #ifndef INET6 421 if (!ip) 422 #else 423 if (!(ip || ip6)) 424 #endif 425 goto skipact; 426 427 switch (act) { 428 case TA_INPUT: 429 case TA_OUTPUT: 430 case TA_DROP: 431 if (aflag) { 432 inet_ntop(family, 433 #ifndef INET6 434 (void *)&ip->ip_src, 435 #else 436 family == AF_INET ? (void *)&ip->ip_src 437 : (void *)&ip6->ip6_src, 438 #endif 439 hbuf, sizeof(hbuf)); 440 printf("(src=%s,%u, ", 441 hbuf, ntohs(th->th_sport)); 442 inet_ntop(family, 443 #ifndef INET6 444 (void *)&ip->ip_dst, 445 #else 446 family == AF_INET ? (void *)&ip->ip_dst 447 : (void *)&ip6->ip6_dst, 448 #endif 449 hbuf, sizeof(hbuf)); 450 printf("dst=%s,%u)", 451 hbuf, ntohs(th->th_dport)); 452 } 453 seq = th->th_seq; 454 ack = th->th_ack; 455 if (ip) 456 len = ip->ip_len; 457 #ifdef INET6 458 else if (ip6) 459 len = ip6->ip6_plen; 460 #endif 461 win = th->th_win; 462 if (act == TA_OUTPUT) { 463 NTOHL(seq); 464 NTOHL(ack); 465 NTOHS(len); 466 NTOHS(win); 467 } 468 if (act == TA_OUTPUT) 469 len -= sizeof(struct tcphdr); 470 if (len) 471 printf("[%x..%x)", seq, seq + len); 472 else 473 printf("%x", seq); 474 printf("@%x", ack); 475 if (win) 476 printf("(win=%x)", win); 477 flags = th->th_flags; 478 if (flags) { 479 const char *cp = "<"; 480 #define pf(flag, string) { \ 481 if (th->th_flags&flag) { \ 482 (void)printf("%s%s", cp, string); \ 483 cp = ","; \ 484 } \ 485 } 486 pf(TH_SYN, "SYN"); 487 pf(TH_ACK, "ACK"); 488 pf(TH_FIN, "FIN"); 489 pf(TH_RST, "RST"); 490 pf(TH_PUSH, "PUSH"); 491 pf(TH_URG, "URG"); 492 pf(TH_CWR, "CWR"); 493 pf(TH_ECE, "ECE"); 494 printf(">"); 495 } 496 break; 497 case TA_USER: 498 timer = req >> 8; 499 req &= 0xff; 500 printf("%s", prurequests[req]); 501 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 502 printf("<%s>", tcptimers[timer]); 503 break; 504 } 505 506 skipact: 507 printf(" -> %s", tcpstates[tp->t_state]); 508 /* print out internal state of tp !?! */ 509 printf("\n"); 510 if (sflag) { 511 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 512 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 513 tp->snd_max); 514 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 515 tp->snd_wl2, tp->snd_wnd); 516 } 517 /* print out timers? */ 518 if (tflag) { 519 const char *cp = "\t"; 520 int i; 521 int hardticks; 522 523 if (use_sysctl) { 524 size_t hlen = sizeof(hardticks); 525 526 if (sysctlbyname("kern.hardclock_ticks", &hardticks, 527 &hlen, NULL, 0) == -1) 528 err(1, "kern.hardclock_ticks"); 529 } else { 530 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 531 (char *)&hardticks, 532 sizeof(hardticks)) != sizeof(hardticks)) 533 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 534 535 for (i = 0; i < TCPT_NTIMERS; i++) { 536 ci = (callout_impl_t *)&tp->t_timer[i]; 537 if ((ci->c_flags & CALLOUT_PENDING) == 0) 538 continue; 539 printf("%s%s=%d", cp, tcptimers[i], 540 ci->c_time - hardticks); 541 if (i == TCPT_REXMT) 542 printf(" (t_rxtshft=%d)", 543 tp->t_rxtshift); 544 cp = ", "; 545 } 546 if (*cp != '\t') 547 putchar('\n'); 548 } 549 } 550 } 551 552 static int 553 numeric(const void *v1, const void *v2) 554 { 555 const caddr_t *c1 = v1; 556 const caddr_t *c2 = v2; 557 int rv; 558 559 if (*c1 < *c2) 560 rv = -1; 561 else if (*c1 > *c2) 562 rv = 1; 563 else 564 rv = 0; 565 566 return (rv); 567 } 568 569 static void 570 usage(void) 571 { 572 573 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 574 " [-N system] [-M core]\n", getprogname()); 575 exit(1); 576 } 577
Indexes created Sat Sep 27 14:09:57 GMT 2025