trpt.c revision 1.13
1 /* $NetBSD: trpt.c,v 1.13 2002/10/12 08:57:16 soda 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 1.13 2002/10/12 08:57:16 soda 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 /* see sys/netinet/tcp_debug.c */ 148 struct tcp_debug tcp_debug[TCP_NDEBUG]; 149 int tcp_debx; 150 151 int main __P((int, char *[])); 152 void dotrace __P((caddr_t)); 153 void tcp_trace __P((short, short, struct tcpcb *, struct tcpcb *, 154 int, void *, int)); 155 int numeric __P((const void *, const void *)); 156 void usage __P((void)); 157 158 kvm_t *kd; 159 160 int 161 main(argc, argv) 162 int argc; 163 char *argv[]; 164 { 165 int ch, i, jflag, npcbs; 166 char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX]; 167 gid_t egid = getegid(); 168 169 (void)setegid(getgid()); 170 system = core = NULL; 171 172 jflag = npcbs = 0; 173 while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) { 174 switch (ch) { 175 case 'a': 176 ++aflag; 177 break; 178 case 'f': 179 ++follow; 180 setlinebuf(stdout); 181 break; 182 case 'j': 183 ++jflag; 184 break; 185 case 'p': 186 if (npcbs >= TCP_NDEBUG) 187 errx(1, "too many pcbs specified"); 188 errno = 0; 189 tcp_pcbs[npcbs++] = (caddr_t)strtoul(optarg, &cp, 16); 190 if (*cp != '\0' || errno == ERANGE) 191 errx(1, "invalid address: %s", optarg); 192 break; 193 case 's': 194 ++sflag; 195 break; 196 case 't': 197 ++tflag; 198 break; 199 case 'N': 200 system = optarg; 201 break; 202 case 'M': 203 core = optarg; 204 break; 205 case '?': 206 default: 207 usage(); 208 /* NOTREACHED */ 209 } 210 } 211 argc -= optind; 212 argv += optind; 213 214 if (argc) 215 usage(); 216 217 /* 218 * Discard setgid privileges. If not the running kernel, we toss 219 * them away totally so that bad guys can't print interesting stuff 220 * from kernel memory, otherwise switch back to kmem for the 221 * duration of the kvm_openfiles() call. 222 */ 223 if (core != NULL || system != NULL) 224 setgid(getgid()); 225 else 226 setegid(egid); 227 228 kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf); 229 if (kd == NULL) 230 errx(1, "can't open kmem: %s", errbuf); 231 232 /* get rid of it now anyway */ 233 if (core == NULL && system == NULL) 234 setgid(getgid()); 235 236 if (kvm_nlist(kd, nl)) 237 errx(2, "%s: no namelist", system ? system : _PATH_UNIX); 238 239 if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx, 240 sizeof(tcp_debx)) != sizeof(tcp_debx)) 241 errx(3, "tcp_debx: %s", kvm_geterr(kd)); 242 243 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 244 sizeof(tcp_debug)) != sizeof(tcp_debug)) 245 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 246 247 /* 248 * If no control blocks have been specified, figure 249 * out how many distinct one we have and summarize 250 * them in tcp_pcbs for sorting the trace records 251 * below. 252 */ 253 if (npcbs == 0) { 254 for (i = 0; i < TCP_NDEBUG; i++) { 255 struct tcp_debug *td = &tcp_debug[i]; 256 int j; 257 258 if (td->td_tcb == 0) 259 continue; 260 for (j = 0; j < npcbs; j++) 261 if (tcp_pcbs[j] == td->td_tcb) 262 break; 263 if (j >= npcbs) 264 tcp_pcbs[npcbs++] = td->td_tcb; 265 } 266 if (npcbs == 0) 267 exit(0); 268 } 269 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 270 if (jflag) { 271 for (i = 0;;) { 272 printf("%lx", (long)tcp_pcbs[i]); 273 if (++i == npcbs) 274 break; 275 fputs(", ", stdout); 276 } 277 putchar('\n'); 278 } else { 279 for (i = 0; i < npcbs; i++) { 280 printf("\n%lx:\n", (long)tcp_pcbs[i]); 281 dotrace(tcp_pcbs[i]); 282 } 283 } 284 exit(0); 285 } 286 287 void 288 dotrace(tcpcb) 289 caddr_t tcpcb; 290 { 291 struct tcp_debug *td; 292 int prev_debx = tcp_debx; 293 int i; 294 295 again: 296 if (--tcp_debx < 0) 297 tcp_debx = TCP_NDEBUG - 1; 298 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 299 td = &tcp_debug[i]; 300 if (tcpcb && td->td_tcb != tcpcb) 301 continue; 302 ntime = ntohl(td->td_time); 303 switch (td->td_family) { 304 case AF_INET: 305 tcp_trace(td->td_act, td->td_ostate, 306 (struct tcpcb *)td->td_tcb, &td->td_cb, 307 td->td_family, &td->td_ti, td->td_req); 308 break; 309 #ifdef INET6 310 case AF_INET6: 311 tcp_trace(td->td_act, td->td_ostate, 312 (struct tcpcb *)td->td_tcb, &td->td_cb, 313 td->td_family, &td->td_ti6, td->td_req); 314 break; 315 #endif 316 default: 317 tcp_trace(td->td_act, td->td_ostate, 318 (struct tcpcb *)td->td_tcb, &td->td_cb, 319 td->td_family, NULL, td->td_req); 320 break; 321 } 322 if (i == tcp_debx) 323 goto done; 324 } 325 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 326 td = &tcp_debug[i]; 327 if (tcpcb && td->td_tcb != tcpcb) 328 continue; 329 ntime = ntohl(td->td_time); 330 switch (td->td_family) { 331 case AF_INET: 332 tcp_trace(td->td_act, td->td_ostate, 333 (struct tcpcb *)td->td_tcb, &td->td_cb, 334 td->td_family, &td->td_ti, td->td_req); 335 break; 336 #ifdef INET6 337 case AF_INET6: 338 tcp_trace(td->td_act, td->td_ostate, 339 (struct tcpcb *)td->td_tcb, &td->td_cb, 340 td->td_family, &td->td_ti6, td->td_req); 341 break; 342 #endif 343 default: 344 tcp_trace(td->td_act, td->td_ostate, 345 (struct tcpcb *)td->td_tcb, &td->td_cb, 346 td->td_family, NULL, td->td_req); 347 break; 348 } 349 } 350 done: 351 if (follow) { 352 prev_debx = tcp_debx + 1; 353 if (prev_debx >= TCP_NDEBUG) 354 prev_debx = 0; 355 do { 356 sleep(1); 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", kvm_geterr(kd)); 361 } while (tcp_debx == prev_debx); 362 363 if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug, 364 sizeof(tcp_debug)) != sizeof(tcp_debug)) 365 errx(3, "tcp_debug: %s", kvm_geterr(kd)); 366 367 goto again; 368 } 369 } 370 371 /* 372 * Tcp debug routines 373 */ 374 /*ARGSUSED*/ 375 void 376 tcp_trace(act, ostate, atp, tp, family, packet, req) 377 short act, ostate; 378 struct tcpcb *atp, *tp; 379 int family; 380 void *packet; 381 int req; 382 { 383 tcp_seq seq, ack; 384 int flags, len, win, timer; 385 struct tcphdr *th = NULL; 386 struct ip *ip = NULL; 387 #ifdef INET6 388 struct ip6_hdr *ip6 = NULL; 389 #endif 390 char hbuf[MAXHOSTNAMELEN]; 391 392 switch (family) { 393 case AF_INET: 394 if (packet) { 395 ip = (struct ip *)packet; 396 th = (struct tcphdr *)(ip + 1); 397 } 398 break; 399 #ifdef INET6 400 case AF_INET6: 401 if (packet) { 402 ip6 = (struct ip6_hdr *)packet; 403 th = (struct tcphdr *)(ip6 + 1); 404 } 405 break; 406 #endif 407 default: 408 return; 409 } 410 411 printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate], 412 tanames[act]); 413 414 #ifndef INET6 415 if (!ip) 416 #else 417 if (!(ip || ip6)) 418 #endif 419 goto skipact; 420 421 switch (act) { 422 case TA_INPUT: 423 case TA_OUTPUT: 424 case TA_DROP: 425 if (aflag) { 426 inet_ntop(family, 427 #ifndef INET6 428 (void *)&ip->ip_src, 429 #else 430 family == AF_INET ? (void *)&ip->ip_src 431 : (void *)&ip6->ip6_src, 432 #endif 433 hbuf, sizeof(hbuf)); 434 printf("(src=%s,%u, ", 435 hbuf, ntohs(th->th_sport)); 436 inet_ntop(family, 437 #ifndef INET6 438 (void *)&ip->ip_dst, 439 #else 440 family == AF_INET ? (void *)&ip->ip_dst 441 : (void *)&ip6->ip6_dst, 442 #endif 443 hbuf, sizeof(hbuf)); 444 printf("dst=%s,%u)", 445 hbuf, ntohs(th->th_dport)); 446 } 447 seq = th->th_seq; 448 ack = th->th_ack; 449 if (ip) 450 len = ip->ip_len; 451 #ifdef INET6 452 else if (ip6) 453 len = ip6->ip6_plen; 454 #endif 455 win = th->th_win; 456 if (act == TA_OUTPUT) { 457 NTOHL(seq); 458 NTOHL(ack); 459 NTOHS(len); 460 NTOHS(win); 461 } 462 if (act == TA_OUTPUT) 463 len -= sizeof(struct tcphdr); 464 if (len) 465 printf("[%x..%x)", seq, seq + len); 466 else 467 printf("%x", seq); 468 printf("@%x", ack); 469 if (win) 470 printf("(win=%x)", win); 471 flags = th->th_flags; 472 if (flags) { 473 register char *cp = "<"; 474 #define pf(flag, string) { \ 475 if (th->th_flags&flag) { \ 476 (void)printf("%s%s", cp, string); \ 477 cp = ","; \ 478 } \ 479 } 480 pf(TH_SYN, "SYN"); 481 pf(TH_ACK, "ACK"); 482 pf(TH_FIN, "FIN"); 483 pf(TH_RST, "RST"); 484 pf(TH_PUSH, "PUSH"); 485 pf(TH_URG, "URG"); 486 printf(">"); 487 } 488 break; 489 case TA_USER: 490 timer = req >> 8; 491 req &= 0xff; 492 printf("%s", prurequests[req]); 493 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 494 printf("<%s>", tcptimers[timer]); 495 break; 496 } 497 498 skipact: 499 printf(" -> %s", tcpstates[tp->t_state]); 500 /* print out internal state of tp !?! */ 501 printf("\n"); 502 if (sflag) { 503 printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n", 504 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 505 tp->snd_max); 506 printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1, 507 tp->snd_wl2, tp->snd_wnd); 508 } 509 /* print out timers? */ 510 if (tflag) { 511 register char *cp = "\t"; 512 register int i; 513 514 for (i = 0; i < TCPT_NTIMERS; i++) { 515 if ((tp->t_timer[i].c_flags & CALLOUT_ACTIVE) == 0) 516 continue; 517 printf("%s%s=%llu", cp, tcptimers[i], 518 (unsigned long long) tp->t_timer[i].c_time); 519 if (i == TCPT_REXMT) 520 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 521 cp = ", "; 522 } 523 if (*cp != '\t') 524 putchar('\n'); 525 } 526 } 527 528 int 529 numeric(v1, v2) 530 const void *v1, *v2; 531 { 532 const caddr_t *c1 = v1; 533 const caddr_t *c2 = v2; 534 int rv; 535 536 if (*c1 < *c2) 537 rv = -1; 538 else if (*c1 > *c2) 539 rv = 1; 540 else 541 rv = 0; 542 543 return (rv); 544 } 545 546 void 547 usage() 548 { 549 550 (void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]" 551 " [-N system] [-M core]\n", getprogname()); 552 exit(1); 553 } 554
Indexes created Wed Sep 24 05:09:52 GMT 2025