trpt.c revision 1.9
1 /* $NetBSD: trpt.c,v 1.9 1999/07/01 19:15:03 itojun 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 1.9 1999/07/01 19:15:03 itojun 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 extern char *__progname; 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(); 166 167 (void)setegid(getgid()); 168 system = core = NULL; 169 170 jflag = npcbs = 0; 171 while ((ch = getopt(argc, argv, "afjp:st")) != -1) { 172 switch (ch) { 173 case 'a': 174 ++aflag; 175 break; 176 case 'f': 177 ++follow; 178 setlinebuf(stdout); 179 break; 180 case 'j': 181 ++jflag; 182 break; 183 case 'p': 184 if (npcbs >= TCP_NDEBUG) 185 errx(1, "too many pcbs specified"); 186 errno = 0; 187 tcp_pcbs[npcbs++] = (caddr_t)strtoul(optarg, &cp, 16); 188 if (*cp != '\0' || errno == ERANGE) 189 errx(1, "invalid address: %s", optarg); 190 break; 191 case 's': 192 ++sflag; 193 break; 194 case 't': 195 ++tflag; 196 break; 197 case 'N': 198 system = optarg; 199 break; 200 case 'M': 201 core = optarg; 202 break; 203 case '?': 204 default: 205 usage(); 206 /* NOTREACHED */ 207 } 208 } 209 argc -= optind; 210 argv += optind; 211 212 if (argc) 213 usage(); 214 215 /* 216 * Discard setgid privileges. If not the running kernel, we toss 217 * them away totally so that bad guys can't print interesting stuff 218 * from kernel memory, otherwise switch back to kmem for the 219 * duration of the kvm_openfiles() call. 220 */ 221 if (core != NULL || system != NULL) 222 setgid(getgid()); 223 else 224 setegid(egid); 225 226 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 227 if (kd == NULL) 228 errx(1, "can't open kmem: %s", errbuf); 229 230 /* get rid of it now anyway */ 231 if (core == NULL && system == NULL) 232 setgid(getgid()); 233 234 if (kvm_nlist(kd, nl)) 235 errx(2, "%s: no namelist", system ? system : _PATH_UNIX); 236 237 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 238 sizeof(tcp_debx)) != sizeof(tcp_debx)) 239 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 240 241 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 242 sizeof(tcp_debug)) != sizeof(tcp_debug)) 243 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 244 245 /* 246 * If no control blocks have been specified, figure 247 * out how many distinct one we have and summarize 248 * them in tcp_pcbs for sorting the trace records 249 * below. 250 */ 251 if (npcbs == 0) { 252 for (i = 0; i < TCP_NDEBUG; i++) { 253 struct tcp_debug *td = &tcp_debug[i]; 254 int j; 255 256 if (td->td_tcb == 0) 257 continue; 258 for (j = 0; j < npcbs; j++) 259 if (tcp_pcbs[j] == td->td_tcb) 260 break; 261 if (j >= npcbs) 262 tcp_pcbs[npcbs++] = td->td_tcb; 263 } 264 if (npcbs == 0) 265 exit(0); 266 } 267 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 268 if (jflag) { 269 for (i = 0;;) { 270 printf("%lx", (long)tcp_pcbs[i]); 271 if (++i == npcbs) 272 break; 273 fputs(", ", stdout); 274 } 275 putchar('\n'); 276 } else { 277 for (i = 0; i < npcbs; i++) { 278 printf("\n%lx:\n", (long)tcp_pcbs[i]); 279 dotrace(tcp_pcbs[i]); 280 } 281 } 282 exit(0); 283 } 284 285 void 286 dotrace(tcpcb) 287 caddr_t tcpcb; 288 { 289 struct tcp_debug *td; 290 int prev_debx = tcp_debx; 291 int i; 292 293 again: 294 if (--tcp_debx < 0) 295 tcp_debx = TCP_NDEBUG - 1; 296 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 297 td = &tcp_debug[i]; 298 if (tcpcb && td->td_tcb != tcpcb) 299 continue; 300 ntime = ntohl(td->td_time); 301 switch (td->td_family) { 302 case AF_INET: 303 tcp_trace(td->td_act, td->td_ostate, 304 (struct tcpcb *)td->td_tcb, &td->td_cb, 305 td->td_family, &td->td_ti, td->td_req); 306 break; 307 #ifdef INET6 308 case AF_INET6: 309 tcp_trace(td->td_act, td->td_ostate, 310 (struct tcpcb *)td->td_tcb, &td->td_cb, 311 td->td_family, &td->td_ti6, td->td_req); 312 break; 313 #endif 314 default: 315 tcp_trace(td->td_act, td->td_ostate, 316 (struct tcpcb *)td->td_tcb, &td->td_cb, 317 td->td_family, NULL, td->td_req); 318 break; 319 } 320 if (i == tcp_debx) 321 goto done; 322 } 323 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 324 td = &tcp_debug[i]; 325 if (tcpcb && td->td_tcb != tcpcb) 326 continue; 327 ntime = ntohl(td->td_time); 328 switch (td->td_family) { 329 case AF_INET: 330 tcp_trace(td->td_act, td->td_ostate, 331 (struct tcpcb *)td->td_tcb, &td->td_cb, 332 td->td_family, &td->td_ti, td->td_req); 333 break; 334 #ifdef INET6 335 case AF_INET6: 336 tcp_trace(td->td_act, td->td_ostate, 337 (struct tcpcb *)td->td_tcb, &td->td_cb, 338 td->td_family, &td->td_ti6, td->td_req); 339 break; 340 #endif 341 default: 342 tcp_trace(td->td_act, td->td_ostate, 343 (struct tcpcb *)td->td_tcb, &td->td_cb, 344 td->td_family, NULL, td->td_req); 345 break; 346 } 347 } 348 done: 349 if (follow) { 350 prev_debx = tcp_debx + 1; 351 if (prev_debx >= TCP_NDEBUG) 352 prev_debx = 0; 353 do { 354 sleep(1); 355 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, 356 (char *)&tcp_debx, sizeof(tcp_debx)) != 357 sizeof(tcp_debx)) 358 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 359 } while (tcp_debx == prev_debx); 360 361 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 362 sizeof(tcp_debug)) != sizeof(tcp_debug)) 363 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 364 365 goto again; 366 } 367 } 368 369 /* 370 * Tcp debug routines 371 */ 372 /*ARGSUSED*/ 373 void 374 tcp_trace(act, ostate, atp, tp, family, packet, req) 375 short act, ostate; 376 struct tcpcb *atp, *tp; 377 int family; 378 void *packet; 379 int req; 380 { 381 tcp_seq seq, ack; 382 int flags, len, win, timer; 383 struct tcphdr *th = NULL; 384 struct ip *ip = NULL; 385 #ifdef INET6 386 struct ip6_hdr *ip6 = NULL; 387 #endif 388 char hbuf[MAXHOSTNAMELEN]; 389 390 switch (family) { 391 case AF_INET: 392 if (packet) { 393 ip = (struct ip *)packet; 394 th = (struct tcphdr *)(ip + 1); 395 } 396 break; 397 #ifdef INET6 398 case AF_INET6: 399 if (packet) { 400 ip6 = (struct ip6_hdr *)packet; 401 th = (struct tcphdr *)(ip6 + 1); 402 } 403 break; 404 #endif 405 default: 406 return; 407 } 408 409 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 410 tanames[act]); 411 412 #ifndef INET6 413 if (!ip) 414 #else 415 if (!(ip || ip6)) 416 #endif 417 goto skipact; 418 419 switch (act) { 420 case TA_INPUT: 421 case TA_OUTPUT: 422 case TA_DROP: 423 if (aflag) { 424 inet_ntop(family, 425 #ifndef INET6 426 (void *)&ip->ip_src, 427 #else 428 family == AF_INET ? (void *)&ip->ip_src 429 : (void *)&ip6->ip6_src, 430 #endif 431 hbuf, sizeof(hbuf)); 432 printf("(src=%s,%u, ", 433 hbuf, ntohs(th->th_sport)); 434 inet_ntop(family, 435 #ifndef INET6 436 (void *)&ip->ip_dst, 437 #else 438 family == AF_INET ? (void *)&ip->ip_dst 439 : (void *)&ip6->ip6_dst, 440 #endif 441 hbuf, sizeof(hbuf)); 442 printf("dst=%s,%u)", 443 hbuf, ntohs(th->th_dport)); 444 } 445 seq = th->th_seq; 446 ack = th->th_ack; 447 if (ip) 448 len = ip->ip_len; 449 #ifdef INET6 450 else if (ip6) 451 len = ip6->ip6_plen; 452 #endif 453 win = th->th_win; 454 if (act == TA_OUTPUT) { 455 NTOHL(seq); 456 NTOHL(ack); 457 NTOHS(len); 458 NTOHS(win); 459 } 460 if (act == TA_OUTPUT) 461 len -= sizeof(struct tcphdr); 462 if (len) 463 printf("[%x..%x)", seq, seq + len); 464 else 465 printf("%x", seq); 466 printf("@%x", ack); 467 if (win) 468 printf("(win=%x)", win); 469 flags = th->th_flags; 470 if (flags) { 471 register char *cp = "<"; 472 #define pf(flag, string) { \ 473 if (th->th_flags&flag) { \ 474 (void)printf("%s%s", cp, string); \ 475 cp = ","; \ 476 } \ 477 } 478 pf(TH_SYN, "SYN"); 479 pf(TH_ACK, "ACK"); 480 pf(TH_FIN, "FIN"); 481 pf(TH_RST, "RST"); 482 pf(TH_PUSH, "PUSH"); 483 pf(TH_URG, "URG"); 484 printf(">"); 485 } 486 break; 487 case TA_USER: 488 timer = req >> 8; 489 req &= 0xff; 490 printf("%s", prurequests[req]); 491 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 492 printf("<%s>", tcptimers[timer]); 493 break; 494 } 495 496 skipact: 497 printf(" -> %s", tcpstates[tp->t_state]); 498 /* print out internal state of tp !?! */ 499 printf("\n"); 500 if (sflag) { 501 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 502 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 503 tp->snd_max); 504 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 505 tp->snd_wl2, tp->snd_wnd); 506 } 507 /* print out timers? */ 508 if (tflag) { 509 register char *cp = "\t"; 510 register int i; 511 512 for (i = 0; i < TCPT_NTIMERS; i++) { 513 if (tp->t_timer[i] == 0) 514 continue; 515 printf("%s%s=%d", cp, tcptimers[i], tp->t_timer[i]); 516 if (i == TCPT_REXMT) 517 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 518 cp = ", "; 519 } 520 if (*cp != '\t') 521 putchar('\n'); 522 } 523 } 524 525 int 526 numeric(v1, v2) 527 const void *v1, *v2; 528 { 529 const caddr_t *c1 = v1; 530 const caddr_t *c2 = v2; 531 int rv; 532 533 if (*c1 < *c2) 534 rv = -1; 535 else if (*c1 > *c2) 536 rv = 1; 537 else 538 rv = 0; 539 540 return (rv); 541 } 542 543 void 544 usage() 545 { 546 547 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 548 " [-N system] [-M core]\n", __progname); 549 exit(1); 550 } 551
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