trpt.c revision 1.17
1 /* $NetBSD: trpt.c,v 1.17 2003/08/07 11:25:49 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1983, 1988, 1993 42 * The Regents of the University of California. All rights reserved. 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. Neither the name of the University nor the names of its contributors 53 * may be used to endorse or promote products derived from this software 54 * without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 66 * SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 #ifndef lint 71 __COPYRIGHT( 72 "@(#) Copyright (c) 1983, 1988, 1993\n\ 73 The Regents of the University of California. All rights reserved.\n"); 74 #endif /* not lint */ 75 76 #ifndef lint 77 #if 0 78 static char sccsid[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93"; 79 #else 80 __RCSID("$NetBSD: trpt.c,v 1.17 2003/08/07 11:25:49 agc Exp $"); 81 #endif 82 #endif /* not lint */ 83 84 #include <sys/param.h> 85 #include <sys/queue.h> 86 #include <sys/socket.h> 87 #include <sys/socketvar.h> 88 #define PRUREQUESTS 89 #include <sys/protosw.h> 90 #include <sys/file.h> 91 92 #include <net/route.h> 93 #include <net/if.h> 94 95 #include <netinet/in.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet/ip_var.h> 100 101 #ifdef INET6 102 #ifndef INET 103 #include <netinet/in.h> 104 #endif 105 #include <netinet/ip6.h> 106 #endif 107 108 #include <netinet/tcp.h> 109 #define TCPSTATES 110 #include <netinet/tcp_fsm.h> 111 #include <netinet/tcp_seq.h> 112 #define TCPTIMERS 113 #include <netinet/tcp_timer.h> 114 #include <netinet/tcp_var.h> 115 #include <netinet/tcpip.h> 116 #define TANAMES 117 #include <netinet/tcp_debug.h> 118 119 #include <arpa/inet.h> 120 121 #include <err.h> 122 #include <stdio.h> 123 #include <errno.h> 124 #include <kvm.h> 125 #include <nlist.h> 126 #include <paths.h> 127 #include <limits.h> 128 #include <stdlib.h> 129 #include <unistd.h> 130 131 struct nlist nl[] = { 132 #define N_HARDCLOCK_TICKS 0 133 { "_hardclock_ticks" }, 134 #define N_TCP_DEBUG 1 135 { "_tcp_debug" }, 136 #define N_TCP_DEBX 2 137 { "_tcp_debx" }, 138 { NULL }, 139 }; 140 141 static caddr_t tcp_pcbs[TCP_NDEBUG]; 142 static n_time ntime; 143 static int aflag, follow, sflag, tflag; 144 145 /* see sys/netinet/tcp_debug.c */ 146 struct tcp_debug tcp_debug[TCP_NDEBUG]; 147 int tcp_debx; 148 149 int main __P((int, char *[])); 150 void dotrace __P((caddr_t)); 151 void tcp_trace __P((short, short, struct tcpcb *, struct tcpcb *, 152 int, void *, int)); 153 int numeric __P((const void *, const void *)); 154 void usage __P((void)); 155 156 kvm_t *kd; 157 158 int 159 main(argc, argv) 160 int argc; 161 char *argv[]; 162 { 163 int ch, i, jflag, npcbs; 164 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 165 gid_t egid = getegid(); 166 unsigned long l; 167 168 (void)setegid(getgid()); 169 system = core = NULL; 170 171 jflag = npcbs = 0; 172 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 173 switch (ch) { 174 case 'a': 175 ++aflag; 176 break; 177 case 'f': 178 ++follow; 179 setlinebuf(stdout); 180 break; 181 case 'j': 182 ++jflag; 183 break; 184 case 'p': 185 if (npcbs >= TCP_NDEBUG) 186 errx(1, "too many pcbs specified"); 187 errno = 0; 188 cp = NULL; 189 l = strtoul(optarg, &cp, 16); 190 tcp_pcbs[npcbs] = (caddr_t)l; 191 if (*optarg == '\0' || *cp != '\0' || errno || 192 (unsigned long)tcp_pcbs[npcbs] != l) 193 errx(1, "invalid address: %s", optarg); 194 npcbs++; 195 break; 196 case 's': 197 ++sflag; 198 break; 199 case 't': 200 ++tflag; 201 break; 202 case 'N': 203 system = optarg; 204 break; 205 case 'M': 206 core = optarg; 207 break; 208 case '?': 209 default: 210 usage(); 211 /* NOTREACHED */ 212 } 213 } 214 argc -= optind; 215 argv += optind; 216 217 if (argc) 218 usage(); 219 220 /* 221 * Discard setgid privileges. If not the running kernel, we toss 222 * them away totally so that bad guys can't print interesting stuff 223 * from kernel memory, otherwise switch back to kmem for the 224 * duration of the kvm_openfiles() call. 225 */ 226 if (core != NULL || system != NULL) 227 setgid(getgid()); 228 else 229 setegid(egid); 230 231 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 232 if (kd == NULL) 233 errx(1, "can't open kmem: %s", errbuf); 234 235 /* get rid of it now anyway */ 236 if (core == NULL && system == NULL) 237 setgid(getgid()); 238 239 if (kvm_nlist(kd, nl)) 240 errx(2, "%s: no namelist", system ? system : _PATH_UNIX); 241 242 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 243 sizeof(tcp_debx)) != sizeof(tcp_debx)) 244 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 245 246 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 247 sizeof(tcp_debug)) != sizeof(tcp_debug)) 248 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 249 250 /* 251 * If no control blocks have been specified, figure 252 * out how many distinct one we have and summarize 253 * them in tcp_pcbs for sorting the trace records 254 * below. 255 */ 256 if (npcbs == 0) { 257 for (i = 0; i < TCP_NDEBUG; i++) { 258 struct tcp_debug *td = &tcp_debug[i]; 259 int j; 260 261 if (td->td_tcb == 0) 262 continue; 263 for (j = 0; j < npcbs; j++) 264 if (tcp_pcbs[j] == td->td_tcb) 265 break; 266 if (j >= npcbs) 267 tcp_pcbs[npcbs++] = td->td_tcb; 268 } 269 if (npcbs == 0) 270 exit(0); 271 } 272 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 273 if (jflag) { 274 for (i = 0;;) { 275 printf("%lx", (long)tcp_pcbs[i]); 276 if (++i == npcbs) 277 break; 278 fputs(", ", stdout); 279 } 280 putchar('\n'); 281 } else { 282 for (i = 0; i < npcbs; i++) { 283 printf("\n%lx:\n", (long)tcp_pcbs[i]); 284 dotrace(tcp_pcbs[i]); 285 } 286 } 287 exit(0); 288 } 289 290 void 291 dotrace(tcpcb) 292 caddr_t tcpcb; 293 { 294 struct tcp_debug *td; 295 int prev_debx = tcp_debx; 296 int i; 297 298 again: 299 if (--tcp_debx < 0) 300 tcp_debx = TCP_NDEBUG - 1; 301 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 302 td = &tcp_debug[i]; 303 if (tcpcb && td->td_tcb != tcpcb) 304 continue; 305 ntime = ntohl(td->td_time); 306 switch (td->td_family) { 307 case AF_INET: 308 tcp_trace(td->td_act, td->td_ostate, 309 (struct tcpcb *)td->td_tcb, &td->td_cb, 310 td->td_family, &td->td_ti, td->td_req); 311 break; 312 #ifdef INET6 313 case AF_INET6: 314 tcp_trace(td->td_act, td->td_ostate, 315 (struct tcpcb *)td->td_tcb, &td->td_cb, 316 td->td_family, &td->td_ti6, td->td_req); 317 break; 318 #endif 319 default: 320 tcp_trace(td->td_act, td->td_ostate, 321 (struct tcpcb *)td->td_tcb, &td->td_cb, 322 td->td_family, NULL, td->td_req); 323 break; 324 } 325 if (i == tcp_debx) 326 goto done; 327 } 328 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 329 td = &tcp_debug[i]; 330 if (tcpcb && td->td_tcb != tcpcb) 331 continue; 332 ntime = ntohl(td->td_time); 333 switch (td->td_family) { 334 case AF_INET: 335 tcp_trace(td->td_act, td->td_ostate, 336 (struct tcpcb *)td->td_tcb, &td->td_cb, 337 td->td_family, &td->td_ti, td->td_req); 338 break; 339 #ifdef INET6 340 case AF_INET6: 341 tcp_trace(td->td_act, td->td_ostate, 342 (struct tcpcb *)td->td_tcb, &td->td_cb, 343 td->td_family, &td->td_ti6, td->td_req); 344 break; 345 #endif 346 default: 347 tcp_trace(td->td_act, td->td_ostate, 348 (struct tcpcb *)td->td_tcb, &td->td_cb, 349 td->td_family, NULL, td->td_req); 350 break; 351 } 352 } 353 done: 354 if (follow) { 355 prev_debx = tcp_debx + 1; 356 if (prev_debx >= TCP_NDEBUG) 357 prev_debx = 0; 358 do { 359 sleep(1); 360 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 361 (char *)&tcp_debx, sizeof(tcp_debx)) != 362 sizeof(tcp_debx)) 363 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 364 } while (tcp_debx == prev_debx); 365 366 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 367 sizeof(tcp_debug)) != sizeof(tcp_debug)) 368 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 369 370 goto again; 371 } 372 } 373 374 /* 375 * Tcp debug routines 376 */ 377 /*ARGSUSED*/ 378 void 379 tcp_trace(act, ostate, atp, tp, family, packet, req) 380 short act, ostate; 381 struct tcpcb *atp, *tp; 382 int family; 383 void *packet; 384 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 char hbuf[MAXHOSTNAMELEN]; 394 395 switch (family) { 396 case AF_INET: 397 if (packet) { 398 ip = (struct ip *)packet; 399 th = (struct tcphdr *)(ip + 1); 400 } 401 break; 402 #ifdef INET6 403 case AF_INET6: 404 if (packet) { 405 ip6 = (struct ip6_hdr *)packet; 406 th = (struct tcphdr *)(ip6 + 1); 407 } 408 break; 409 #endif 410 default: 411 return; 412 } 413 414 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 415 tanames[act]); 416 417 #ifndef INET6 418 if (!ip) 419 #else 420 if (!(ip || ip6)) 421 #endif 422 goto skipact; 423 424 switch (act) { 425 case TA_INPUT: 426 case TA_OUTPUT: 427 case TA_DROP: 428 if (aflag) { 429 inet_ntop(family, 430 #ifndef INET6 431 (void *)&ip->ip_src, 432 #else 433 family == AF_INET ? (void *)&ip->ip_src 434 : (void *)&ip6->ip6_src, 435 #endif 436 hbuf, sizeof(hbuf)); 437 printf("(src=%s,%u, ", 438 hbuf, ntohs(th->th_sport)); 439 inet_ntop(family, 440 #ifndef INET6 441 (void *)&ip->ip_dst, 442 #else 443 family == AF_INET ? (void *)&ip->ip_dst 444 : (void *)&ip6->ip6_dst, 445 #endif 446 hbuf, sizeof(hbuf)); 447 printf("dst=%s,%u)", 448 hbuf, ntohs(th->th_dport)); 449 } 450 seq = th->th_seq; 451 ack = th->th_ack; 452 if (ip) 453 len = ip->ip_len; 454 #ifdef INET6 455 else if (ip6) 456 len = ip6->ip6_plen; 457 #endif 458 win = th->th_win; 459 if (act == TA_OUTPUT) { 460 NTOHL(seq); 461 NTOHL(ack); 462 NTOHS(len); 463 NTOHS(win); 464 } 465 if (act == TA_OUTPUT) 466 len -= sizeof(struct tcphdr); 467 if (len) 468 printf("[%x..%x)", seq, seq + len); 469 else 470 printf("%x", seq); 471 printf("@%x", ack); 472 if (win) 473 printf("(win=%x)", win); 474 flags = th->th_flags; 475 if (flags) { 476 register char *cp = "<"; 477 #define pf(flag, string) { \ 478 if (th->th_flags&flag) { \ 479 (void)printf("%s%s", cp, string); \ 480 cp = ","; \ 481 } \ 482 } 483 pf(TH_SYN, "SYN"); 484 pf(TH_ACK, "ACK"); 485 pf(TH_FIN, "FIN"); 486 pf(TH_RST, "RST"); 487 pf(TH_PUSH, "PUSH"); 488 pf(TH_URG, "URG"); 489 printf(">"); 490 } 491 break; 492 case TA_USER: 493 timer = req >> 8; 494 req &= 0xff; 495 printf("%s", prurequests[req]); 496 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 497 printf("<%s>", tcptimers[timer]); 498 break; 499 } 500 501 skipact: 502 printf(" -> %s", tcpstates[tp->t_state]); 503 /* print out internal state of tp !?! */ 504 printf("\n"); 505 if (sflag) { 506 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 507 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 508 tp->snd_max); 509 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 510 tp->snd_wl2, tp->snd_wnd); 511 } 512 /* print out timers? */ 513 if (tflag) { 514 register char *cp = "\t"; 515 register int i; 516 int hardticks; 517 518 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 519 (char *)&hardticks, sizeof(hardticks)) != sizeof(hardticks)) 520 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 521 522 for (i = 0; i < TCPT_NTIMERS; i++) { 523 if ((tp->t_timer[i].c_flags & CALLOUT_PENDING) == 0) 524 continue; 525 printf("%s%s=%d", cp, tcptimers[i], 526 tp->t_timer[i].c_time - hardticks); 527 if (i == TCPT_REXMT) 528 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 529 cp = ", "; 530 } 531 if (*cp != '\t') 532 putchar('\n'); 533 } 534 } 535 536 int 537 numeric(v1, v2) 538 const void *v1, *v2; 539 { 540 const caddr_t *c1 = v1; 541 const caddr_t *c2 = v2; 542 int rv; 543 544 if (*c1 < *c2) 545 rv = -1; 546 else if (*c1 > *c2) 547 rv = 1; 548 else 549 rv = 0; 550 551 return (rv); 552 } 553 554 void 555 usage() 556 { 557 558 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 559 " [-N system] [-M core]\n", getprogname()); 560 exit(1); 561 } 562
Indexes created Wed Oct 22 06:10:02 GMT 2025