1 /* 2 * Copyright (c) 1983, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)trpt.c 5.14 (Berkeley) 07/01/91"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #if BSD >= 199103 20 #define NEWVM 21 #endif 22 #ifndef NEWVM 23 #include <machine/pte.h> 24 #include <sys/vmmac.h> 25 #endif 26 #include <sys/socket.h> 27 #include <sys/socketvar.h> 28 #define PRUREQUESTS 29 #include <sys/protosw.h> 30 #include <sys/file.h> 31 32 #include <net/route.h> 33 #include <net/if.h> 34 35 #include <netinet/in.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <netinet/in_pcb.h> 39 #include <netinet/ip_var.h> 40 #include <netinet/tcp.h> 41 #define TCPSTATES 42 #include <netinet/tcp_fsm.h> 43 #include <netinet/tcp_seq.h> 44 #define TCPTIMERS 45 #include <netinet/tcp_timer.h> 46 #include <netinet/tcp_var.h> 47 #include <netinet/tcpip.h> 48 #define TANAMES 49 #include <netinet/tcp_debug.h> 50 51 #include <arpa/inet.h> 52 53 #include <stdio.h> 54 #include <errno.h> 55 #include <nlist.h> 56 #include <paths.h> 57 58 struct nlist nl[] = { 59 #define N_TCP_DEBUG 0 60 { "_tcp_debug" }, 61 #define N_TCP_DEBX 1 62 { "_tcp_debx" }, 63 #ifndef NEWVM 64 #define N_SYSMAP 2 65 { "_Sysmap" }, 66 #define N_SYSSIZE 3 67 { "_Syssize" }, 68 #endif 69 { "" }, 70 }; 71 72 #ifndef NEWVM 73 static struct pte *Sysmap; 74 #endif 75 static caddr_t tcp_pcbs[TCP_NDEBUG]; 76 static n_time ntime; 77 static int aflag, kflag, memf, follow, sflag, tflag; 78 79 main(argc, argv) 80 int argc; 81 char **argv; 82 { 83 extern char *optarg; 84 extern int optind; 85 int ch, i, jflag, npcbs, numeric(); 86 char *system, *core, *malloc(); 87 off_t lseek(); 88 89 jflag = npcbs = 0; 90 while ((ch = getopt(argc, argv, "afjp:st")) != EOF) 91 switch (ch) { 92 case 'a': 93 ++aflag; 94 break; 95 case 'f': 96 ++follow; 97 setlinebuf(stdout); 98 break; 99 case 'j': 100 ++jflag; 101 break; 102 case 'p': 103 if (npcbs >= TCP_NDEBUG) { 104 fputs("trpt: too many pcb's specified\n", 105 stderr); 106 exit(1); 107 } 108 (void)sscanf(optarg, "%x", (int *)&tcp_pcbs[npcbs++]); 109 break; 110 case 's': 111 ++sflag; 112 break; 113 case 't': 114 ++tflag; 115 break; 116 case '?': 117 default: 118 (void)fprintf(stderr, 119 "usage: trpt [-afjst] [-p hex-address] [system [core]]\n"); 120 exit(1); 121 } 122 argc -= optind; 123 argv += optind; 124 125 core = _PATH_KMEM; 126 if (argc > 0) { 127 system = *argv; 128 argc--, argv++; 129 if (argc > 0) { 130 core = *argv; 131 argc--, argv++; 132 ++kflag; 133 } 134 } 135 else 136 system = _PATH_UNIX; 137 138 if (nlist(system, nl) < 0 || !nl[0].n_value) { 139 fprintf(stderr, "trpt: %s: no namelist\n", system); 140 exit(1); 141 } 142 if ((memf = open(core, O_RDONLY)) < 0) { 143 perror(core); 144 exit(2); 145 } 146 if (kflag) { 147 #ifdef NEWVM 148 fputs("trpt: can't do core files yet\n", stderr); 149 exit(1); 150 #else 151 off_t off; 152 153 Sysmap = (struct pte *) 154 malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte))); 155 if (!Sysmap) { 156 fputs("trpt: can't get memory for Sysmap.\n", stderr); 157 exit(1); 158 } 159 off = nl[N_SYSMAP].n_value & ~KERNBASE; 160 (void)lseek(memf, off, L_SET); 161 (void)read(memf, (char *)Sysmap, 162 (int)(nl[N_SYSSIZE].n_value * sizeof(struct pte))); 163 #endif 164 } 165 (void)klseek(memf, (off_t)nl[N_TCP_DEBX].n_value, L_SET); 166 if (read(memf, (char *)&tcp_debx, sizeof(tcp_debx)) != 167 sizeof(tcp_debx)) { 168 perror("trpt: tcp_debx"); 169 exit(3); 170 } 171 (void)klseek(memf, (off_t)nl[N_TCP_DEBUG].n_value, L_SET); 172 if (read(memf, (char *)tcp_debug, sizeof(tcp_debug)) != 173 sizeof(tcp_debug)) { 174 perror("trpt: tcp_debug"); 175 exit(3); 176 } 177 /* 178 * If no control blocks have been specified, figure 179 * out how many distinct one we have and summarize 180 * them in tcp_pcbs for sorting the trace records 181 * below. 182 */ 183 if (!npcbs) { 184 for (i = 0; i < TCP_NDEBUG; i++) { 185 register struct tcp_debug *td = &tcp_debug[i]; 186 register int j; 187 188 if (td->td_tcb == 0) 189 continue; 190 for (j = 0; j < npcbs; j++) 191 if (tcp_pcbs[j] == td->td_tcb) 192 break; 193 if (j >= npcbs) 194 tcp_pcbs[npcbs++] = td->td_tcb; 195 } 196 if (!npcbs) 197 exit(0); 198 } 199 qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric); 200 if (jflag) { 201 for (i = 0;;) { 202 printf("%x", (int)tcp_pcbs[i]); 203 if (++i == npcbs) 204 break; 205 fputs(", ", stdout); 206 } 207 putchar('\n'); 208 } 209 else for (i = 0; i < npcbs; i++) { 210 printf("\n%x:\n", (int)tcp_pcbs[i]); 211 dotrace(tcp_pcbs[i]); 212 } 213 exit(0); 214 } 215 216 dotrace(tcpcb) 217 register caddr_t tcpcb; 218 { 219 register struct tcp_debug *td; 220 register int i; 221 int prev_debx = tcp_debx; 222 223 again: if (--tcp_debx < 0) 224 tcp_debx = TCP_NDEBUG - 1; 225 for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) { 226 td = &tcp_debug[i]; 227 if (tcpcb && td->td_tcb != tcpcb) 228 continue; 229 ntime = ntohl(td->td_time); 230 tcp_trace(td->td_act, td->td_ostate, td->td_tcb, &td->td_cb, 231 &td->td_ti, td->td_req); 232 if (i == tcp_debx) 233 goto done; 234 } 235 for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) { 236 td = &tcp_debug[i]; 237 if (tcpcb && td->td_tcb != tcpcb) 238 continue; 239 ntime = ntohl(td->td_time); 240 tcp_trace(td->td_act, td->td_ostate, td->td_tcb, &td->td_cb, 241 &td->td_ti, td->td_req); 242 } 243 done: if (follow) { 244 prev_debx = tcp_debx + 1; 245 if (prev_debx >= TCP_NDEBUG) 246 prev_debx = 0; 247 do { 248 sleep(1); 249 (void)klseek(memf, (off_t)nl[N_TCP_DEBX].n_value, L_SET); 250 if (read(memf, (char *)&tcp_debx, sizeof(tcp_debx)) != 251 sizeof(tcp_debx)) { 252 perror("trpt: tcp_debx"); 253 exit(3); 254 } 255 } while (tcp_debx == prev_debx); 256 (void)klseek(memf, (off_t)nl[N_TCP_DEBUG].n_value, L_SET); 257 if (read(memf, (char *)tcp_debug, sizeof(tcp_debug)) != 258 sizeof(tcp_debug)) { 259 perror("trpt: tcp_debug"); 260 exit(3); 261 } 262 goto again; 263 } 264 } 265 266 /* 267 * Tcp debug routines 268 */ 269 /*ARGSUSED*/ 270 tcp_trace(act, ostate, atp, tp, ti, req) 271 short act, ostate; 272 struct tcpcb *atp, *tp; 273 struct tcpiphdr *ti; 274 int req; 275 { 276 tcp_seq seq, ack; 277 int flags, len, win, timer; 278 279 printf("%03ld %s:%s ",(ntime/10) % 1000, tcpstates[ostate], 280 tanames[act]); 281 switch (act) { 282 case TA_INPUT: 283 case TA_OUTPUT: 284 case TA_DROP: 285 if (aflag) { 286 printf("(src=%s,%u, ", 287 inet_ntoa(ti->ti_src), ntohs(ti->ti_sport)); 288 printf("dst=%s,%u)", 289 inet_ntoa(ti->ti_dst), ntohs(ti->ti_dport)); 290 } 291 seq = ti->ti_seq; 292 ack = ti->ti_ack; 293 len = ti->ti_len; 294 win = ti->ti_win; 295 if (act == TA_OUTPUT) { 296 seq = ntohl(seq); 297 ack = ntohl(ack); 298 len = ntohs(len); 299 win = ntohs(win); 300 } 301 if (act == TA_OUTPUT) 302 len -= sizeof(struct tcphdr); 303 if (len) 304 printf("[%lx..%lx)", seq, seq + len); 305 else 306 printf("%lx", seq); 307 printf("@%lx", ack); 308 if (win) 309 printf("(win=%x)", win); 310 flags = ti->ti_flags; 311 if (flags) { 312 register char *cp = "<"; 313 #define pf(flag, string) { \ 314 if (ti->ti_flags&flag) { \ 315 (void)printf("%s%s", cp, string); \ 316 cp = ","; \ 317 } \ 318 } 319 pf(TH_SYN, "SYN"); 320 pf(TH_ACK, "ACK"); 321 pf(TH_FIN, "FIN"); 322 pf(TH_RST, "RST"); 323 pf(TH_PUSH, "PUSH"); 324 pf(TH_URG, "URG"); 325 printf(">"); 326 } 327 break; 328 case TA_USER: 329 timer = req >> 8; 330 req &= 0xff; 331 printf("%s", prurequests[req]); 332 if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO) 333 printf("<%s>", tcptimers[timer]); 334 break; 335 } 336 printf(" -> %s", tcpstates[tp->t_state]); 337 /* print out internal state of tp !?! */ 338 printf("\n"); 339 if (sflag) { 340 printf("\trcv_nxt %lx rcv_wnd %x snd_una %lx snd_nxt %lx snd_max %lx\n", 341 tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt, 342 tp->snd_max); 343 printf("\tsnd_wl1 %lx snd_wl2 %lx snd_wnd %x\n", tp->snd_wl1, 344 tp->snd_wl2, tp->snd_wnd); 345 } 346 /* print out timers? */ 347 if (tflag) { 348 register char *cp = "\t"; 349 register int i; 350 351 for (i = 0; i < TCPT_NTIMERS; i++) { 352 if (tp->t_timer[i] == 0) 353 continue; 354 printf("%s%s=%d", cp, tcptimers[i], tp->t_timer[i]); 355 if (i == TCPT_REXMT) 356 printf(" (t_rxtshft=%d)", tp->t_rxtshift); 357 cp = ", "; 358 } 359 if (*cp != '\t') 360 putchar('\n'); 361 } 362 } 363 364 numeric(c1, c2) 365 caddr_t *c1, *c2; 366 { 367 return(*c1 - *c2); 368 } 369 370 klseek(fd, base, off) 371 int fd, off; 372 off_t base; 373 { 374 off_t lseek(); 375 376 #ifndef NEWVM 377 if (kflag) { /* get kernel pte */ 378 base &= ~KERNBASE; 379 base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET); 380 } 381 #endif 382 (void)lseek(fd, base, off); 383 } 384