trpt.c revision 1.16
1 /* $NetBSD: trpt.c,v 1.16 2003/02/04 01:22:10 thorpej 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. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 */ 72 73 #include <sys/cdefs.h> 74 #ifndef lint 75 __COPYRIGHT( 76 "@(#) Copyright (c) 1983, 1988, 1993\n\ 77 The Regents of the University of California. All rights reserved.\n"); 78 #endif /* not lint */ 79 80 #ifndef lint 81 #if 0 82 static char sccsid[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93"; 83 #else 84 __RCSID("$NetBSD: trpt.c,v 1.16 2003/02/04 01:22:10 thorpej Exp $"); 85 #endif 86 #endif /* not lint */ 87 88 #include <sys/param.h> 89 #include <sys/queue.h> 90 #include <sys/socket.h> 91 #include <sys/socketvar.h> 92 #define PRUREQUESTS 93 #include <sys/protosw.h> 94 #include <sys/file.h> 95 96 #include <net/route.h> 97 #include <net/if.h> 98 99 #include <netinet/in.h> 100 #include <netinet/in_systm.h> 101 #include <netinet/ip.h> 102 #include <netinet/in_pcb.h> 103 #include <netinet/ip_var.h> 104 105 #ifdef INET6 106 #ifndef INET 107 #include <netinet/in.h> 108 #endif 109 #include <netinet/ip6.h> 110 #endif 111 112 #include <netinet/tcp.h> 113 #define TCPSTATES 114 #include <netinet/tcp_fsm.h> 115 #include <netinet/tcp_seq.h> 116 #define TCPTIMERS 117 #include <netinet/tcp_timer.h> 118 #include <netinet/tcp_var.h> 119 #include <netinet/tcpip.h> 120 #define TANAMES 121 #include <netinet/tcp_debug.h> 122 123 #include <arpa/inet.h> 124 125 #include <err.h> 126 #include <stdio.h> 127 #include <errno.h> 128 #include <kvm.h> 129 #include <nlist.h> 130 #include <paths.h> 131 #include <limits.h> 132 #include <stdlib.h> 133 #include <unistd.h> 134 135 struct nlist nl[] = { 136 #define N_HARDCLOCK_TICKS 0 137 { "_hardclock_ticks" }, 138 #define N_TCP_DEBUG 1 139 { "_tcp_debug" }, 140 #define N_TCP_DEBX 2 141 { "_tcp_debx" }, 142 { NULL }, 143 }; 144 145 static caddr_t tcp_pcbs[TCP_NDEBUG]; 146 static n_time ntime; 147 static int aflag, follow, sflag, tflag; 148 149 /* see sys/netinet/tcp_debug.c */ 150 struct tcp_debug tcp_debug[TCP_NDEBUG]; 151 int tcp_debx; 152 153 int main __P((int, char *[])); 154 void dotrace __P((caddr_t)); 155 void tcp_trace __P((short, short, struct tcpcb *, struct tcpcb *, 156 int, void *, int)); 157 int numeric __P((const void *, const void *)); 158 void usage __P((void)); 159 160 kvm_t *kd; 161 162 int 163 main(argc, argv) 164 int argc; 165 char *argv[]; 166 { 167 int ch, i, jflag, npcbs; 168 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 169 gid_t egid = getegid(); 170 unsigned long l; 171 172 (void)setegid(getgid()); 173 system = core = NULL; 174 175 jflag = npcbs = 0; 176 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 177 switch (ch) { 178 case 'a': 179 ++aflag; 180 break; 181 case 'f': 182 ++follow; 183 setlinebuf(stdout); 184 break; 185 case 'j': 186 ++jflag; 187 break; 188 case 'p': 189 if (npcbs >= TCP_NDEBUG) 190 errx(1, "too many pcbs specified"); 191 errno = 0; 192 cp = NULL; 193 l = strtoul(optarg, &cp, 16); 194 tcp_pcbs[npcbs] = (caddr_t)l; 195 if (*optarg == '\0' || *cp != '\0' || errno || 196 (unsigned long)tcp_pcbs[npcbs] != l) 197 errx(1, "invalid address: %s", optarg); 198 npcbs++; 199 break; 200 case 's': 201 ++sflag; 202 break; 203 case 't': 204 ++tflag; 205 break; 206 case 'N': 207 system = optarg; 208 break; 209 case 'M': 210 core = optarg; 211 break; 212 case '?': 213 default: 214 usage(); 215 /* NOTREACHED */ 216 } 217 } 218 argc -= optind; 219 argv += optind; 220 221 if (argc) 222 usage(); 223 224 /* 225 * Discard setgid privileges. If not the running kernel, we toss 226 * them away totally so that bad guys can't print interesting stuff 227 * from kernel memory, otherwise switch back to kmem for the 228 * duration of the kvm_openfiles() call. 229 */ 230 if (core != NULL || system != NULL) 231 setgid(getgid()); 232 else 233 setegid(egid); 234 235 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 236 if (kd == NULL) 237 errx(1, "can't open kmem: %s", errbuf); 238 239 /* get rid of it now anyway */ 240 if (core == NULL && system == NULL) 241 setgid(getgid()); 242 243 if (kvm_nlist(kd, nl)) 244 errx(2, "%s: no namelist", system ? system : _PATH_UNIX); 245 246 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 247 sizeof(tcp_debx)) != sizeof(tcp_debx)) 248 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 249 250 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 251 sizeof(tcp_debug)) != sizeof(tcp_debug)) 252 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 253 254 /* 255 * If no control blocks have been specified, figure 256 * out how many distinct one we have and summarize 257 * them in tcp_pcbs for sorting the trace records 258 * below. 259 */ 260 if (npcbs == 0) { 261 for (i = 0; i < TCP_NDEBUG; i++) { 262 struct tcp_debug *td = &tcp_debug[i]; 263 int j; 264 265 if (td->td_tcb == 0) 266 continue; 267 for (j = 0; j < npcbs; j++) 268 if (tcp_pcbs[j] == td->td_tcb) 269 break; 270 if (j >= npcbs) 271 tcp_pcbs[npcbs++] = td->td_tcb; 272 } 273 if (npcbs == 0) 274 exit(0); 275 } 276 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 277 if (jflag) { 278 for (i = 0;;) { 279 printf("%lx", (long)tcp_pcbs[i]); 280 if (++i == npcbs) 281 break; 282 fputs(", ", stdout); 283 } 284 putchar('\n'); 285 } else { 286 for (i = 0; i < npcbs; i++) { 287 printf("\n%lx:\n", (long)tcp_pcbs[i]); 288 dotrace(tcp_pcbs[i]); 289 } 290 } 291 exit(0); 292 } 293 294 void 295 dotrace(tcpcb) 296 caddr_t tcpcb; 297 { 298 struct tcp_debug *td; 299 int prev_debx = tcp_debx; 300 int i; 301 302 again: 303 if (--tcp_debx < 0) 304 tcp_debx = TCP_NDEBUG - 1; 305 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 306 td = &tcp_debug[i]; 307 if (tcpcb && td->td_tcb != tcpcb) 308 continue; 309 ntime = ntohl(td->td_time); 310 switch (td->td_family) { 311 case AF_INET: 312 tcp_trace(td->td_act, td->td_ostate, 313 (struct tcpcb *)td->td_tcb, &td->td_cb, 314 td->td_family, &td->td_ti, td->td_req); 315 break; 316 #ifdef INET6 317 case AF_INET6: 318 tcp_trace(td->td_act, td->td_ostate, 319 (struct tcpcb *)td->td_tcb, &td->td_cb, 320 td->td_family, &td->td_ti6, td->td_req); 321 break; 322 #endif 323 default: 324 tcp_trace(td->td_act, td->td_ostate, 325 (struct tcpcb *)td->td_tcb, &td->td_cb, 326 td->td_family, NULL, td->td_req); 327 break; 328 } 329 if (i == tcp_debx) 330 goto done; 331 } 332 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 333 td = &tcp_debug[i]; 334 if (tcpcb && td->td_tcb != tcpcb) 335 continue; 336 ntime = ntohl(td->td_time); 337 switch (td->td_family) { 338 case AF_INET: 339 tcp_trace(td->td_act, td->td_ostate, 340 (struct tcpcb *)td->td_tcb, &td->td_cb, 341 td->td_family, &td->td_ti, td->td_req); 342 break; 343 #ifdef INET6 344 case AF_INET6: 345 tcp_trace(td->td_act, td->td_ostate, 346 (struct tcpcb *)td->td_tcb, &td->td_cb, 347 td->td_family, &td->td_ti6, td->td_req); 348 break; 349 #endif 350 default: 351 tcp_trace(td->td_act, td->td_ostate, 352 (struct tcpcb *)td->td_tcb, &td->td_cb, 353 td->td_family, NULL, td->td_req); 354 break; 355 } 356 } 357 done: 358 if (follow) { 359 prev_debx = tcp_debx + 1; 360 if (prev_debx >= TCP_NDEBUG) 361 prev_debx = 0; 362 do { 363 sleep(1); 364 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 365 (char *)&tcp_debx, sizeof(tcp_debx)) != 366 sizeof(tcp_debx)) 367 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 368 } while (tcp_debx == prev_debx); 369 370 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (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 void 383 tcp_trace(act, ostate, atp, tp, family, packet, req) 384 short act, ostate; 385 struct tcpcb *atp, *tp; 386 int family; 387 void *packet; 388 int req; 389 { 390 tcp_seq seq, ack; 391 int flags, len, win, timer; 392 struct tcphdr *th = NULL; 393 struct ip *ip = NULL; 394 #ifdef INET6 395 struct ip6_hdr *ip6 = NULL; 396 #endif 397 char hbuf[MAXHOSTNAMELEN]; 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 register 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 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 register char *cp = "\t"; 519 register int i; 520 int hardticks; 521 522 if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value, 523 (char *)&hardticks, sizeof(hardticks)) != sizeof(hardticks)) 524 errx(3, "hardclock_ticks: %s", kvm_geterr(kd)); 525 526 for (i = 0; i < TCPT_NTIMERS; i++) { 527 if ((tp->t_timer[i].c_flags & CALLOUT_PENDING) == 0) 528 continue; 529 printf("%s%s=%d", cp, tcptimers[i], 530 tp->t_timer[i].c_time - hardticks); 531 if (i == TCPT_REXMT) 532 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 533 cp = ", "; 534 } 535 if (*cp != '\t') 536 putchar('\n'); 537 } 538 } 539 540 int 541 numeric(v1, v2) 542 const void *v1, *v2; 543 { 544 const caddr_t *c1 = v1; 545 const caddr_t *c2 = v2; 546 int rv; 547 548 if (*c1 < *c2) 549 rv = -1; 550 else if (*c1 > *c2) 551 rv = 1; 552 else 553 rv = 0; 554 555 return (rv); 556 } 557 558 void 559 usage() 560 { 561 562 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 563 " [-N system] [-M core]\n", getprogname()); 564 exit(1); 565 } 566
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