trpt.c revision 1.25
1 /* $NetBSD: trpt.c,v 1.25 2008/07/21 13:37:00 lukem 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 1.25 2008/07/21 13:37:00 lukem 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 struct nlist nl[] = { 127 #define N_HARDCLOCK_TICKS 0 128 { "_hardclock_ticks" }, 129 #define N_TCP_DEBUG 1 130 { "_tcp_debug" }, 131 #define N_TCP_DEBX 2 132 { "_tcp_debx" }, 133 { NULL }, 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 struct tcp_debug tcp_debug[TCP_NDEBUG]; 142 int tcp_debx; 143 144 int main(int, char *[]); 145 void dotrace(caddr_t); 146 void tcp_trace(short, short, struct tcpcb *, struct tcpcb *, 147 int, void *, int); 148 int numeric(const void *, const void *); 149 void usage(void); 150 151 kvm_t *kd; 152 int use_sysctl; 153 154 int 155 main(int argc, char *argv[]) 156 { 157 int ch, i, jflag, npcbs; 158 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 159 unsigned long l; 160 161 jflag = npcbs = 0; 162 system = core = NULL; 163 164 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 165 switch (ch) { 166 case 'a': 167 ++aflag; 168 break; 169 case 'f': 170 ++follow; 171 setlinebuf(stdout); 172 break; 173 case 'j': 174 ++jflag; 175 break; 176 case 'p': 177 if (npcbs >= TCP_NDEBUG) 178 errx(1, "too many pcbs specified"); 179 errno = 0; 180 cp = NULL; 181 l = strtoul(optarg, &cp, 16); 182 tcp_pcbs[npcbs] = (caddr_t)l; 183 if (*optarg == '\0' || *cp != '\0' || errno || 184 (unsigned long)tcp_pcbs[npcbs] != l) 185 errx(1, "invalid address: %s", optarg); 186 npcbs++; 187 break; 188 case 's': 189 ++sflag; 190 break; 191 case 't': 192 ++tflag; 193 break; 194 case 'N': 195 system = optarg; 196 break; 197 case 'M': 198 core = optarg; 199 break; 200 default: 201 usage(); 202 /* NOTREACHED */ 203 } 204 } 205 argc -= optind; 206 argv += optind; 207 208 if (argc) 209 usage(); 210 211 use_sysctl = (system == NULL && core == NULL); 212 213 if (use_sysctl) { 214 size_t lenx = sizeof(tcp_debx); 215 size_t lend = sizeof(tcp_debug); 216 217 if (sysctlbyname("net.inet.tcp.debx", &tcp_debx, &lenx, 218 NULL, 0) == -1) 219 err(1, "net.inet.tcp.debx"); 220 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, &lend, 221 NULL, 0) == -1) 222 err(1, "net.inet.tcp.debug"); 223 } else { 224 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 225 if (kd == NULL) 226 errx(1, "can't open kmem: %s", errbuf); 227 228 if (kvm_nlist(kd, nl)) 229 errx(2, "%s: no namelist", system); 230 231 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 232 sizeof(tcp_debx)) != sizeof(tcp_debx)) 233 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 234 235 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 236 sizeof(tcp_debug)) != sizeof(tcp_debug)) 237 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 238 } 239 240 /* 241 * If no control blocks have been specified, figure 242 * out how many distinct one we have and summarize 243 * them in tcp_pcbs for sorting the trace records 244 * below. 245 */ 246 if (npcbs == 0) { 247 for (i = 0; i < TCP_NDEBUG; i++) { 248 struct tcp_debug *td = &tcp_debug[i]; 249 int j; 250 251 if (td->td_tcb == 0) 252 continue; 253 for (j = 0; j < npcbs; j++) 254 if (tcp_pcbs[j] == td->td_tcb) 255 break; 256 if (j >= npcbs) 257 tcp_pcbs[npcbs++] = td->td_tcb; 258 } 259 if (npcbs == 0) 260 exit(0); 261 } 262 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 263 if (jflag) { 264 for (i = 0;;) { 265 printf("%lx", (long)tcp_pcbs[i]); 266 if (++i == npcbs) 267 break; 268 fputs(", ", stdout); 269 } 270 putchar('\n'); 271 } else { 272 for (i = 0; i < npcbs; i++) { 273 printf("\n%lx:\n", (long)tcp_pcbs[i]); 274 dotrace(tcp_pcbs[i]); 275 } 276 } 277 exit(0); 278 } 279 280 void 281 dotrace(caddr_t tcpcb) 282 { 283 struct tcp_debug *td; 284 int prev_debx = tcp_debx; 285 int i; 286 287 again: 288 if (--tcp_debx < 0) 289 tcp_debx = TCP_NDEBUG - 1; 290 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 291 td = &tcp_debug[i]; 292 if (tcpcb && td->td_tcb != tcpcb) 293 continue; 294 ntime = ntohl(td->td_time); 295 switch (td->td_family) { 296 case AF_INET: 297 tcp_trace(td->td_act, td->td_ostate, 298 (struct tcpcb *)td->td_tcb, &td->td_cb, 299 td->td_family, &td->td_ti, td->td_req); 300 break; 301 #ifdef INET6 302 case AF_INET6: 303 tcp_trace(td->td_act, td->td_ostate, 304 (struct tcpcb *)td->td_tcb, &td->td_cb, 305 td->td_family, &td->td_ti6, td->td_req); 306 break; 307 #endif 308 default: 309 tcp_trace(td->td_act, td->td_ostate, 310 (struct tcpcb *)td->td_tcb, &td->td_cb, 311 td->td_family, NULL, td->td_req); 312 break; 313 } 314 if (i == tcp_debx) 315 goto done; 316 } 317 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 318 td = &tcp_debug[i]; 319 if (tcpcb && td->td_tcb != tcpcb) 320 continue; 321 ntime = ntohl(td->td_time); 322 switch (td->td_family) { 323 case AF_INET: 324 tcp_trace(td->td_act, td->td_ostate, 325 (struct tcpcb *)td->td_tcb, &td->td_cb, 326 td->td_family, &td->td_ti, td->td_req); 327 break; 328 #ifdef INET6 329 case AF_INET6: 330 tcp_trace(td->td_act, td->td_ostate, 331 (struct tcpcb *)td->td_tcb, &td->td_cb, 332 td->td_family, &td->td_ti6, td->td_req); 333 break; 334 #endif 335 default: 336 tcp_trace(td->td_act, td->td_ostate, 337 (struct tcpcb *)td->td_tcb, &td->td_cb, 338 td->td_family, NULL, td->td_req); 339 break; 340 } 341 } 342 done: 343 if (follow) { 344 prev_debx = tcp_debx + 1; 345 if (prev_debx >= TCP_NDEBUG) 346 prev_debx = 0; 347 do { 348 sleep(1); 349 if (use_sysctl) { 350 size_t len = sizeof(tcp_debx); 351 352 if (sysctlbyname("net.inet.tcp.debx", 353 &tcp_debx, &len, NULL, 0) == -1) 354 err(1, "net.inet.tcp.debx"); 355 } else 356 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 357 (char *)&tcp_debx, sizeof(tcp_debx)) != 358 sizeof(tcp_debx)) 359 errx(3, "tcp_debx: %s", 360 kvm_geterr(kd)); 361 } while (tcp_debx == prev_debx); 362 363 if (use_sysctl) { 364 size_t len = sizeof(tcp_debug); 365 366 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, 367 &len, NULL, 0) == -1) 368 err(1, "net.inet.tcp.debug"); 369 } else 370 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, 371 (char *)tcp_debug, 372 sizeof(tcp_debug)) != sizeof(tcp_debug)) 373 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 374 375 goto again; 376 } 377 } 378 379 /* 380 * Tcp debug routines 381 */ 382 /*ARGSUSED*/ 383 void 384 tcp_trace(short act, short ostate, struct tcpcb *atp, struct tcpcb *tp, 385 int family, void *packet, int req) 386 { 387 tcp_seq seq, ack; 388 int flags, len, win, timer; 389 struct tcphdr *th = NULL; 390 struct ip *ip = NULL; 391 #ifdef INET6 392 struct ip6_hdr *ip6 = NULL; 393 #endif 394 callout_impl_t *ci; 395 char hbuf[MAXHOSTNAMELEN]; 396 397 len = 0; /* XXXGCC -Wuninitialized */ 398 399 switch (family) { 400 case AF_INET: 401 if (packet) { 402 ip = (struct ip *)packet; 403 th = (struct tcphdr *)(ip + 1); 404 } 405 break; 406 #ifdef INET6 407 case AF_INET6: 408 if (packet) { 409 ip6 = (struct ip6_hdr *)packet; 410 th = (struct tcphdr *)(ip6 + 1); 411 } 412 break; 413 #endif 414 default: 415 return; 416 } 417 418 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 419 tanames[act]); 420 421 #ifndef INET6 422 if (!ip) 423 #else 424 if (!(ip || ip6)) 425 #endif 426 goto skipact; 427 428 switch (act) { 429 case TA_INPUT: 430 case TA_OUTPUT: 431 case TA_DROP: 432 if (aflag) { 433 inet_ntop(family, 434 #ifndef INET6 435 (void *)&ip->ip_src, 436 #else 437 family == AF_INET ? (void *)&ip->ip_src 438 : (void *)&ip6->ip6_src, 439 #endif 440 hbuf, sizeof(hbuf)); 441 printf("(src=%s,%u, ", 442 hbuf, ntohs(th->th_sport)); 443 inet_ntop(family, 444 #ifndef INET6 445 (void *)&ip->ip_dst, 446 #else 447 family == AF_INET ? (void *)&ip->ip_dst 448 : (void *)&ip6->ip6_dst, 449 #endif 450 hbuf, sizeof(hbuf)); 451 printf("dst=%s,%u)", 452 hbuf, ntohs(th->th_dport)); 453 } 454 seq = th->th_seq; 455 ack = th->th_ack; 456 if (ip) 457 len = ip->ip_len; 458 #ifdef INET6 459 else if (ip6) 460 len = ip6->ip6_plen; 461 #endif 462 win = th->th_win; 463 if (act == TA_OUTPUT) { 464 NTOHL(seq); 465 NTOHL(ack); 466 NTOHS(len); 467 NTOHS(win); 468 } 469 if (act == TA_OUTPUT) 470 len -= sizeof(struct tcphdr); 471 if (len) 472 printf("[%x..%x)", seq, seq + len); 473 else 474 printf("%x", seq); 475 printf("@%x", ack); 476 if (win) 477 printf("(win=%x)", win); 478 flags = th->th_flags; 479 if (flags) { 480 char *cp = "<"; 481 #define pf(flag, string) { \ 482 if (th->th_flags&flag) { \ 483 (void)printf("%s%s", cp, string); \ 484 cp = ","; \ 485 } \ 486 } 487 pf(TH_SYN, "SYN"); 488 pf(TH_ACK, "ACK"); 489 pf(TH_FIN, "FIN"); 490 pf(TH_RST, "RST"); 491 pf(TH_PUSH, "PUSH"); 492 pf(TH_URG, "URG"); 493 pf(TH_CWR, "CWR"); 494 pf(TH_ECE, "ECE"); 495 printf(">"); 496 } 497 break; 498 case TA_USER: 499 timer = req >> 8; 500 req &= 0xff; 501 printf("%s", prurequests[req]); 502 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 503 printf("<%s>", tcptimers[timer]); 504 break; 505 } 506 507 skipact: 508 printf(" -> %s", tcpstates[tp->t_state]); 509 /* print out internal state of tp !?! */ 510 printf("\n"); 511 if (sflag) { 512 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 513 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 514 tp->snd_max); 515 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 516 tp->snd_wl2, tp->snd_wnd); 517 } 518 /* print out timers? */ 519 if (tflag) { 520 char *cp = "\t"; 521 int i; 522 int hardticks; 523 524 if (use_sysctl) { 525 size_t len = sizeof(hardticks); 526 527 if (sysctlbyname("kern.hardclock_ticks", &hardticks, 528 &len, NULL, 0) == -1) 529 err(1, "kern.hardclock_ticks"); 530 } else { 531 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 532 (char *)&hardticks, 533 sizeof(hardticks)) != sizeof(hardticks)) 534 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 535 536 for (i = 0; i < TCPT_NTIMERS; i++) { 537 ci = (callout_impl_t *)&tp->t_timer[i]; 538 if ((ci->c_flags & CALLOUT_PENDING) == 0) 539 continue; 540 printf("%s%s=%d", cp, tcptimers[i], 541 ci->c_time - hardticks); 542 if (i == TCPT_REXMT) 543 printf(" (t_rxtshft=%d)", 544 tp->t_rxtshift); 545 cp = ", "; 546 } 547 if (*cp != '\t') 548 putchar('\n'); 549 } 550 } 551 } 552 553 int 554 numeric(const void *v1, const void *v2) 555 { 556 const caddr_t *c1 = v1; 557 const caddr_t *c2 = v2; 558 int rv; 559 560 if (*c1 < *c2) 561 rv = -1; 562 else if (*c1 > *c2) 563 rv = 1; 564 else 565 rv = 0; 566 567 return (rv); 568 } 569 570 void 571 usage(void) 572 { 573 574 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 575 " [-N system] [-M core]\n", getprogname()); 576 exit(1); 577 } 578
Indexes created Mon Sep 29 18:09:42 GMT 2025