trpt.c revision 1.10
1 /* $NetBSD: trpt.c,v 1.10 2001/02/19 23:22:48 cgd 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 1.10 2001/02/19 23:22:48 cgd 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_TCP_DEBUG 0 137 { "_tcp_debug" }, 138 #define N_TCP_DEBX 1 139 { "_tcp_debx" }, 140 { NULL }, 141 }; 142 143 static caddr_t tcp_pcbs[TCP_NDEBUG]; 144 static n_time ntime; 145 static int aflag, follow, sflag, tflag; 146 147 int main __P((int, char *[])); 148 void dotrace __P((caddr_t)); 149 void tcp_trace __P((short, short, struct tcpcb *, struct tcpcb *, 150 int, void *, int)); 151 int numeric __P((const void *, const void *)); 152 void usage __P((void)); 153 154 kvm_t *kd; 155 156 int 157 main(argc, argv) 158 int argc; 159 char *argv[]; 160 { 161 int ch, i, jflag, npcbs; 162 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 163 gid_t egid = getegid(); 164 165 (void)setegid(getgid()); 166 system = core = NULL; 167 168 jflag = npcbs = 0; 169 while ((ch = getopt(argc, argv, "afjp:st")) != -1) { 170 switch (ch) { 171 case 'a': 172 ++aflag; 173 break; 174 case 'f': 175 ++follow; 176 setlinebuf(stdout); 177 break; 178 case 'j': 179 ++jflag; 180 break; 181 case 'p': 182 if (npcbs >= TCP_NDEBUG) 183 errx(1, "too many pcbs specified"); 184 errno = 0; 185 tcp_pcbs[npcbs++] = (caddr_t)strtoul(optarg, &cp, 16); 186 if (*cp != '\0' || errno == ERANGE) 187 errx(1, "invalid address: %s", optarg); 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 case '?': 202 default: 203 usage(); 204 /* NOTREACHED */ 205 } 206 } 207 argc -= optind; 208 argv += optind; 209 210 if (argc) 211 usage(); 212 213 /* 214 * Discard setgid privileges. If not the running kernel, we toss 215 * them away totally so that bad guys can't print interesting stuff 216 * from kernel memory, otherwise switch back to kmem for the 217 * duration of the kvm_openfiles() call. 218 */ 219 if (core != NULL || system != NULL) 220 setgid(getgid()); 221 else 222 setegid(egid); 223 224 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 225 if (kd == NULL) 226 errx(1, "can't open kmem: %s", errbuf); 227 228 /* get rid of it now anyway */ 229 if (core == NULL && system == NULL) 230 setgid(getgid()); 231 232 if (kvm_nlist(kd, nl)) 233 errx(2, "%s: no namelist", system ? system : _PATH_UNIX); 234 235 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 236 sizeof(tcp_debx)) != sizeof(tcp_debx)) 237 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 238 239 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 240 sizeof(tcp_debug)) != sizeof(tcp_debug)) 241 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 242 243 /* 244 * If no control blocks have been specified, figure 245 * out how many distinct one we have and summarize 246 * them in tcp_pcbs for sorting the trace records 247 * below. 248 */ 249 if (npcbs == 0) { 250 for (i = 0; i < TCP_NDEBUG; i++) { 251 struct tcp_debug *td = &tcp_debug[i]; 252 int j; 253 254 if (td->td_tcb == 0) 255 continue; 256 for (j = 0; j < npcbs; j++) 257 if (tcp_pcbs[j] == td->td_tcb) 258 break; 259 if (j >= npcbs) 260 tcp_pcbs[npcbs++] = td->td_tcb; 261 } 262 if (npcbs == 0) 263 exit(0); 264 } 265 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 266 if (jflag) { 267 for (i = 0;;) { 268 printf("%lx", (long)tcp_pcbs[i]); 269 if (++i == npcbs) 270 break; 271 fputs(", ", stdout); 272 } 273 putchar('\n'); 274 } else { 275 for (i = 0; i < npcbs; i++) { 276 printf("\n%lx:\n", (long)tcp_pcbs[i]); 277 dotrace(tcp_pcbs[i]); 278 } 279 } 280 exit(0); 281 } 282 283 void 284 dotrace(tcpcb) 285 caddr_t tcpcb; 286 { 287 struct tcp_debug *td; 288 int prev_debx = tcp_debx; 289 int i; 290 291 again: 292 if (--tcp_debx < 0) 293 tcp_debx = TCP_NDEBUG - 1; 294 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 295 td = &tcp_debug[i]; 296 if (tcpcb && td->td_tcb != tcpcb) 297 continue; 298 ntime = ntohl(td->td_time); 299 switch (td->td_family) { 300 case AF_INET: 301 tcp_trace(td->td_act, td->td_ostate, 302 (struct tcpcb *)td->td_tcb, &td->td_cb, 303 td->td_family, &td->td_ti, td->td_req); 304 break; 305 #ifdef INET6 306 case AF_INET6: 307 tcp_trace(td->td_act, td->td_ostate, 308 (struct tcpcb *)td->td_tcb, &td->td_cb, 309 td->td_family, &td->td_ti6, td->td_req); 310 break; 311 #endif 312 default: 313 tcp_trace(td->td_act, td->td_ostate, 314 (struct tcpcb *)td->td_tcb, &td->td_cb, 315 td->td_family, NULL, td->td_req); 316 break; 317 } 318 if (i == tcp_debx) 319 goto done; 320 } 321 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 322 td = &tcp_debug[i]; 323 if (tcpcb && td->td_tcb != tcpcb) 324 continue; 325 ntime = ntohl(td->td_time); 326 switch (td->td_family) { 327 case AF_INET: 328 tcp_trace(td->td_act, td->td_ostate, 329 (struct tcpcb *)td->td_tcb, &td->td_cb, 330 td->td_family, &td->td_ti, td->td_req); 331 break; 332 #ifdef INET6 333 case AF_INET6: 334 tcp_trace(td->td_act, td->td_ostate, 335 (struct tcpcb *)td->td_tcb, &td->td_cb, 336 td->td_family, &td->td_ti6, td->td_req); 337 break; 338 #endif 339 default: 340 tcp_trace(td->td_act, td->td_ostate, 341 (struct tcpcb *)td->td_tcb, &td->td_cb, 342 td->td_family, NULL, td->td_req); 343 break; 344 } 345 } 346 done: 347 if (follow) { 348 prev_debx = tcp_debx + 1; 349 if (prev_debx >= TCP_NDEBUG) 350 prev_debx = 0; 351 do { 352 sleep(1); 353 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 354 (char *)&tcp_debx, sizeof(tcp_debx)) != 355 sizeof(tcp_debx)) 356 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 357 } while (tcp_debx == prev_debx); 358 359 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 360 sizeof(tcp_debug)) != sizeof(tcp_debug)) 361 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 362 363 goto again; 364 } 365 } 366 367 /* 368 * Tcp debug routines 369 */ 370 /*ARGSUSED*/ 371 void 372 tcp_trace(act, ostate, atp, tp, family, packet, req) 373 short act, ostate; 374 struct tcpcb *atp, *tp; 375 int family; 376 void *packet; 377 int req; 378 { 379 tcp_seq seq, ack; 380 int flags, len, win, timer; 381 struct tcphdr *th = NULL; 382 struct ip *ip = NULL; 383 #ifdef INET6 384 struct ip6_hdr *ip6 = NULL; 385 #endif 386 char hbuf[MAXHOSTNAMELEN]; 387 388 switch (family) { 389 case AF_INET: 390 if (packet) { 391 ip = (struct ip *)packet; 392 th = (struct tcphdr *)(ip + 1); 393 } 394 break; 395 #ifdef INET6 396 case AF_INET6: 397 if (packet) { 398 ip6 = (struct ip6_hdr *)packet; 399 th = (struct tcphdr *)(ip6 + 1); 400 } 401 break; 402 #endif 403 default: 404 return; 405 } 406 407 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 408 tanames[act]); 409 410 #ifndef INET6 411 if (!ip) 412 #else 413 if (!(ip || ip6)) 414 #endif 415 goto skipact; 416 417 switch (act) { 418 case TA_INPUT: 419 case TA_OUTPUT: 420 case TA_DROP: 421 if (aflag) { 422 inet_ntop(family, 423 #ifndef INET6 424 (void *)&ip->ip_src, 425 #else 426 family == AF_INET ? (void *)&ip->ip_src 427 : (void *)&ip6->ip6_src, 428 #endif 429 hbuf, sizeof(hbuf)); 430 printf("(src=%s,%u, ", 431 hbuf, ntohs(th->th_sport)); 432 inet_ntop(family, 433 #ifndef INET6 434 (void *)&ip->ip_dst, 435 #else 436 family == AF_INET ? (void *)&ip->ip_dst 437 : (void *)&ip6->ip6_dst, 438 #endif 439 hbuf, sizeof(hbuf)); 440 printf("dst=%s,%u)", 441 hbuf, ntohs(th->th_dport)); 442 } 443 seq = th->th_seq; 444 ack = th->th_ack; 445 if (ip) 446 len = ip->ip_len; 447 #ifdef INET6 448 else if (ip6) 449 len = ip6->ip6_plen; 450 #endif 451 win = th->th_win; 452 if (act == TA_OUTPUT) { 453 NTOHL(seq); 454 NTOHL(ack); 455 NTOHS(len); 456 NTOHS(win); 457 } 458 if (act == TA_OUTPUT) 459 len -= sizeof(struct tcphdr); 460 if (len) 461 printf("[%x..%x)", seq, seq + len); 462 else 463 printf("%x", seq); 464 printf("@%x", ack); 465 if (win) 466 printf("(win=%x)", win); 467 flags = th->th_flags; 468 if (flags) { 469 register char *cp = "<"; 470 #define pf(flag, string) { \ 471 if (th->th_flags&flag) { \ 472 (void)printf("%s%s", cp, string); \ 473 cp = ","; \ 474 } \ 475 } 476 pf(TH_SYN, "SYN"); 477 pf(TH_ACK, "ACK"); 478 pf(TH_FIN, "FIN"); 479 pf(TH_RST, "RST"); 480 pf(TH_PUSH, "PUSH"); 481 pf(TH_URG, "URG"); 482 printf(">"); 483 } 484 break; 485 case TA_USER: 486 timer = req >> 8; 487 req &= 0xff; 488 printf("%s", prurequests[req]); 489 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 490 printf("<%s>", tcptimers[timer]); 491 break; 492 } 493 494 skipact: 495 printf(" -> %s", tcpstates[tp->t_state]); 496 /* print out internal state of tp !?! */ 497 printf("\n"); 498 if (sflag) { 499 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 500 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 501 tp->snd_max); 502 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 503 tp->snd_wl2, tp->snd_wnd); 504 } 505 /* print out timers? */ 506 if (tflag) { 507 register char *cp = "\t"; 508 register int i; 509 510 for (i = 0; i < TCPT_NTIMERS; i++) { 511 if (tp->t_timer[i] == 0) 512 continue; 513 printf("%s%s=%d", cp, tcptimers[i], tp->t_timer[i]); 514 if (i == TCPT_REXMT) 515 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 516 cp = ", "; 517 } 518 if (*cp != '\t') 519 putchar('\n'); 520 } 521 } 522 523 int 524 numeric(v1, v2) 525 const void *v1, *v2; 526 { 527 const caddr_t *c1 = v1; 528 const caddr_t *c2 = v2; 529 int rv; 530 531 if (*c1 < *c2) 532 rv = -1; 533 else if (*c1 > *c2) 534 rv = 1; 535 else 536 rv = 0; 537 538 return (rv); 539 } 540 541 void 542 usage() 543 { 544 545 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 546 " [-N system] [-M core]\n", getprogname()); 547 exit(1); 548 } 549
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