trpt.c revision 1.23.10.1
1 /* $NetBSD: trpt.c,v 1.23.10.1 2008/05/18 12:36:23 yamt 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( 65 "@(#) Copyright (c) 1983, 1988, 1993\n\ 66 The Regents of the University of California. All rights reserved.\n"); 67 #endif /* not lint */ 68 69 #ifndef lint 70 #if 0 71 static char sccsid[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93"; 72 #else 73 __RCSID("$NetBSD: trpt.c,v 1.23.10.1 2008/05/18 12:36:23 yamt Exp $"); 74 #endif 75 #endif /* not lint */ 76 77 #define _CALLOUT_PRIVATE /* for defs in sys/callout.h */ 78 79 #include <sys/param.h> 80 #include <sys/queue.h> 81 #include <sys/socket.h> 82 #include <sys/socketvar.h> 83 #include <sys/sysctl.h> 84 #define PRUREQUESTS 85 #include <sys/protosw.h> 86 #include <sys/file.h> 87 88 #include <net/route.h> 89 #include <net/if.h> 90 91 #include <netinet/in.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/ip.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet/ip_var.h> 96 97 #ifdef INET6 98 #ifndef INET 99 #include <netinet/in.h> 100 #endif 101 #include <netinet/ip6.h> 102 #endif 103 104 #include <netinet/tcp.h> 105 #define TCPSTATES 106 #include <netinet/tcp_fsm.h> 107 #include <netinet/tcp_seq.h> 108 #define TCPTIMERS 109 #include <netinet/tcp_timer.h> 110 #include <netinet/tcp_var.h> 111 #include <netinet/tcpip.h> 112 #define TANAMES 113 #include <netinet/tcp_debug.h> 114 115 #include <arpa/inet.h> 116 117 #include <err.h> 118 #include <stdio.h> 119 #include <errno.h> 120 #include <kvm.h> 121 #include <nlist.h> 122 #include <paths.h> 123 #include <limits.h> 124 #include <stdlib.h> 125 #include <unistd.h> 126 127 struct nlist nl[] = { 128 #define N_HARDCLOCK_TICKS 0 129 { "_hardclock_ticks" }, 130 #define N_TCP_DEBUG 1 131 { "_tcp_debug" }, 132 #define N_TCP_DEBX 2 133 { "_tcp_debx" }, 134 { NULL }, 135 }; 136 137 static caddr_t tcp_pcbs[TCP_NDEBUG]; 138 static n_time ntime; 139 static int aflag, follow, sflag, tflag; 140 141 /* see sys/netinet/tcp_debug.c */ 142 struct tcp_debug tcp_debug[TCP_NDEBUG]; 143 int tcp_debx; 144 145 int main(int, char *[]); 146 void dotrace(caddr_t); 147 void tcp_trace(short, short, struct tcpcb *, struct tcpcb *, 148 int, void *, int); 149 int numeric(const void *, const void *); 150 void usage(void); 151 152 kvm_t *kd; 153 int use_sysctl; 154 155 int 156 main(int argc, char *argv[]) 157 { 158 int ch, i, jflag, npcbs; 159 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 160 unsigned long l; 161 162 jflag = npcbs = 0; 163 system = core = NULL; 164 165 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 166 switch (ch) { 167 case 'a': 168 ++aflag; 169 break; 170 case 'f': 171 ++follow; 172 setlinebuf(stdout); 173 break; 174 case 'j': 175 ++jflag; 176 break; 177 case 'p': 178 if (npcbs >= TCP_NDEBUG) 179 errx(1, "too many pcbs specified"); 180 errno = 0; 181 cp = NULL; 182 l = strtoul(optarg, &cp, 16); 183 tcp_pcbs[npcbs] = (caddr_t)l; 184 if (*optarg == '\0' || *cp != '\0' || errno || 185 (unsigned long)tcp_pcbs[npcbs] != l) 186 errx(1, "invalid address: %s", optarg); 187 npcbs++; 188 break; 189 case 's': 190 ++sflag; 191 break; 192 case 't': 193 ++tflag; 194 break; 195 case 'N': 196 system = optarg; 197 break; 198 case 'M': 199 core = optarg; 200 break; 201 default: 202 usage(); 203 /* NOTREACHED */ 204 } 205 } 206 argc -= optind; 207 argv += optind; 208 209 if (argc) 210 usage(); 211 212 use_sysctl = (system == NULL && core == NULL); 213 214 if (use_sysctl) { 215 size_t lenx = sizeof(tcp_debx); 216 size_t lend = sizeof(tcp_debug); 217 218 if (sysctlbyname("net.inet.tcp.debx", &tcp_debx, &lenx, 219 NULL, 0) == -1) 220 err(1, "net.inet.tcp.debx"); 221 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, &lend, 222 NULL, 0) == -1) 223 err(1, "net.inet.tcp.debug"); 224 } else { 225 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 226 if (kd == NULL) 227 errx(1, "can't open kmem: %s", errbuf); 228 229 if (kvm_nlist(kd, nl)) 230 errx(2, "%s: no namelist", system); 231 232 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 233 sizeof(tcp_debx)) != sizeof(tcp_debx)) 234 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 235 236 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 237 sizeof(tcp_debug)) != sizeof(tcp_debug)) 238 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 239 } 240 241 /* 242 * If no control blocks have been specified, figure 243 * out how many distinct one we have and summarize 244 * them in tcp_pcbs for sorting the trace records 245 * below. 246 */ 247 if (npcbs == 0) { 248 for (i = 0; i < TCP_NDEBUG; i++) { 249 struct tcp_debug *td = &tcp_debug[i]; 250 int j; 251 252 if (td->td_tcb == 0) 253 continue; 254 for (j = 0; j < npcbs; j++) 255 if (tcp_pcbs[j] == td->td_tcb) 256 break; 257 if (j >= npcbs) 258 tcp_pcbs[npcbs++] = td->td_tcb; 259 } 260 if (npcbs == 0) 261 exit(0); 262 } 263 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 264 if (jflag) { 265 for (i = 0;;) { 266 printf("%lx", (long)tcp_pcbs[i]); 267 if (++i == npcbs) 268 break; 269 fputs(", ", stdout); 270 } 271 putchar('\n'); 272 } else { 273 for (i = 0; i < npcbs; i++) { 274 printf("\n%lx:\n", (long)tcp_pcbs[i]); 275 dotrace(tcp_pcbs[i]); 276 } 277 } 278 exit(0); 279 } 280 281 void 282 dotrace(caddr_t tcpcb) 283 { 284 struct tcp_debug *td; 285 int prev_debx = tcp_debx; 286 int i; 287 288 again: 289 if (--tcp_debx < 0) 290 tcp_debx = TCP_NDEBUG - 1; 291 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 292 td = &tcp_debug[i]; 293 if (tcpcb && td->td_tcb != tcpcb) 294 continue; 295 ntime = ntohl(td->td_time); 296 switch (td->td_family) { 297 case AF_INET: 298 tcp_trace(td->td_act, td->td_ostate, 299 (struct tcpcb *)td->td_tcb, &td->td_cb, 300 td->td_family, &td->td_ti, td->td_req); 301 break; 302 #ifdef INET6 303 case AF_INET6: 304 tcp_trace(td->td_act, td->td_ostate, 305 (struct tcpcb *)td->td_tcb, &td->td_cb, 306 td->td_family, &td->td_ti6, td->td_req); 307 break; 308 #endif 309 default: 310 tcp_trace(td->td_act, td->td_ostate, 311 (struct tcpcb *)td->td_tcb, &td->td_cb, 312 td->td_family, NULL, td->td_req); 313 break; 314 } 315 if (i == tcp_debx) 316 goto done; 317 } 318 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 319 td = &tcp_debug[i]; 320 if (tcpcb && td->td_tcb != tcpcb) 321 continue; 322 ntime = ntohl(td->td_time); 323 switch (td->td_family) { 324 case AF_INET: 325 tcp_trace(td->td_act, td->td_ostate, 326 (struct tcpcb *)td->td_tcb, &td->td_cb, 327 td->td_family, &td->td_ti, td->td_req); 328 break; 329 #ifdef INET6 330 case AF_INET6: 331 tcp_trace(td->td_act, td->td_ostate, 332 (struct tcpcb *)td->td_tcb, &td->td_cb, 333 td->td_family, &td->td_ti6, td->td_req); 334 break; 335 #endif 336 default: 337 tcp_trace(td->td_act, td->td_ostate, 338 (struct tcpcb *)td->td_tcb, &td->td_cb, 339 td->td_family, NULL, td->td_req); 340 break; 341 } 342 } 343 done: 344 if (follow) { 345 prev_debx = tcp_debx + 1; 346 if (prev_debx >= TCP_NDEBUG) 347 prev_debx = 0; 348 do { 349 sleep(1); 350 if (use_sysctl) { 351 size_t len = sizeof(tcp_debx); 352 353 if (sysctlbyname("net.inet.tcp.debx", 354 &tcp_debx, &len, NULL, 0) == -1) 355 err(1, "net.inet.tcp.debx"); 356 } else 357 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 358 (char *)&tcp_debx, sizeof(tcp_debx)) != 359 sizeof(tcp_debx)) 360 errx(3, "tcp_debx: %s", 361 kvm_geterr(kd)); 362 } while (tcp_debx == prev_debx); 363 364 if (use_sysctl) { 365 size_t len = sizeof(tcp_debug); 366 367 if (sysctlbyname("net.inet.tcp.debug", &tcp_debug, 368 &len, NULL, 0) == -1) 369 err(1, "net.inet.tcp.debug"); 370 } else 371 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, 372 (char *)tcp_debug, 373 sizeof(tcp_debug)) != sizeof(tcp_debug)) 374 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 375 376 goto again; 377 } 378 } 379 380 /* 381 * Tcp debug routines 382 */ 383 /*ARGSUSED*/ 384 void 385 tcp_trace(short act, short ostate, struct tcpcb *atp, struct tcpcb *tp, 386 int family, void *packet, int req) 387 { 388 tcp_seq seq, ack; 389 int flags, len, win, timer; 390 struct tcphdr *th = NULL; 391 struct ip *ip = NULL; 392 #ifdef INET6 393 struct ip6_hdr *ip6 = NULL; 394 #endif 395 callout_impl_t *ci; 396 char hbuf[MAXHOSTNAMELEN]; 397 398 len = 0; /* XXXGCC -Wuninitialized */ 399 400 switch (family) { 401 case AF_INET: 402 if (packet) { 403 ip = (struct ip *)packet; 404 th = (struct tcphdr *)(ip + 1); 405 } 406 break; 407 #ifdef INET6 408 case AF_INET6: 409 if (packet) { 410 ip6 = (struct ip6_hdr *)packet; 411 th = (struct tcphdr *)(ip6 + 1); 412 } 413 break; 414 #endif 415 default: 416 return; 417 } 418 419 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 420 tanames[act]); 421 422 #ifndef INET6 423 if (!ip) 424 #else 425 if (!(ip || ip6)) 426 #endif 427 goto skipact; 428 429 switch (act) { 430 case TA_INPUT: 431 case TA_OUTPUT: 432 case TA_DROP: 433 if (aflag) { 434 inet_ntop(family, 435 #ifndef INET6 436 (void *)&ip->ip_src, 437 #else 438 family == AF_INET ? (void *)&ip->ip_src 439 : (void *)&ip6->ip6_src, 440 #endif 441 hbuf, sizeof(hbuf)); 442 printf("(src=%s,%u, ", 443 hbuf, ntohs(th->th_sport)); 444 inet_ntop(family, 445 #ifndef INET6 446 (void *)&ip->ip_dst, 447 #else 448 family == AF_INET ? (void *)&ip->ip_dst 449 : (void *)&ip6->ip6_dst, 450 #endif 451 hbuf, sizeof(hbuf)); 452 printf("dst=%s,%u)", 453 hbuf, ntohs(th->th_dport)); 454 } 455 seq = th->th_seq; 456 ack = th->th_ack; 457 if (ip) 458 len = ip->ip_len; 459 #ifdef INET6 460 else if (ip6) 461 len = ip6->ip6_plen; 462 #endif 463 win = th->th_win; 464 if (act == TA_OUTPUT) { 465 NTOHL(seq); 466 NTOHL(ack); 467 NTOHS(len); 468 NTOHS(win); 469 } 470 if (act == TA_OUTPUT) 471 len -= sizeof(struct tcphdr); 472 if (len) 473 printf("[%x..%x)", seq, seq + len); 474 else 475 printf("%x", seq); 476 printf("@%x", ack); 477 if (win) 478 printf("(win=%x)", win); 479 flags = th->th_flags; 480 if (flags) { 481 char *cp = "<"; 482 #define pf(flag, string) { \ 483 if (th->th_flags&flag) { \ 484 (void)printf("%s%s", cp, string); \ 485 cp = ","; \ 486 } \ 487 } 488 pf(TH_SYN, "SYN"); 489 pf(TH_ACK, "ACK"); 490 pf(TH_FIN, "FIN"); 491 pf(TH_RST, "RST"); 492 pf(TH_PUSH, "PUSH"); 493 pf(TH_URG, "URG"); 494 pf(TH_CWR, "CWR"); 495 pf(TH_ECE, "ECE"); 496 printf(">"); 497 } 498 break; 499 case TA_USER: 500 timer = req >> 8; 501 req &= 0xff; 502 printf("%s", prurequests[req]); 503 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 504 printf("<%s>", tcptimers[timer]); 505 break; 506 } 507 508 skipact: 509 printf(" -> %s", tcpstates[tp->t_state]); 510 /* print out internal state of tp !?! */ 511 printf("\n"); 512 if (sflag) { 513 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 514 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 515 tp->snd_max); 516 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 517 tp->snd_wl2, tp->snd_wnd); 518 } 519 /* print out timers? */ 520 if (tflag) { 521 char *cp = "\t"; 522 int i; 523 int hardticks; 524 525 if (use_sysctl) { 526 size_t len = sizeof(hardticks); 527 528 if (sysctlbyname("kern.hardclock_ticks", &hardticks, 529 &len, NULL, 0) == -1) 530 err(1, "kern.hardclock_ticks"); 531 } else { 532 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 533 (char *)&hardticks, 534 sizeof(hardticks)) != sizeof(hardticks)) 535 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 536 537 for (i = 0; i < TCPT_NTIMERS; i++) { 538 ci = (callout_impl_t *)&tp->t_timer[i]; 539 if ((ci->c_flags & CALLOUT_PENDING) == 0) 540 continue; 541 printf("%s%s=%d", cp, tcptimers[i], 542 ci->c_time - hardticks); 543 if (i == TCPT_REXMT) 544 printf(" (t_rxtshft=%d)", 545 tp->t_rxtshift); 546 cp = ", "; 547 } 548 if (*cp != '\t') 549 putchar('\n'); 550 } 551 } 552 } 553 554 int 555 numeric(const void *v1, const void *v2) 556 { 557 const caddr_t *c1 = v1; 558 const caddr_t *c2 = v2; 559 int rv; 560 561 if (*c1 < *c2) 562 rv = -1; 563 else if (*c1 > *c2) 564 rv = 1; 565 else 566 rv = 0; 567 568 return (rv); 569 } 570 571 void 572 usage(void) 573 { 574 575 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 576 " [-N system] [-M core]\n", getprogname()); 577 exit(1); 578 } 579
Indexes created Tue Oct 21 19:09:51 GMT 2025