1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93"; 36 #endif /* not lint */ 37 38 /* 39 * netstat 40 */ 41 #include <sys/param.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/mbuf.h> 45 #include <sys/protosw.h> 46 #include <sys/queue.h> 47 48 #include <netinet/in.h> 49 #include <net/route.h> 50 #include <netinet/in_systm.h> 51 #include <netinet/ip.h> 52 #include <netinet/in_pcb.h> 53 #include <netinet/ip_icmp.h> 54 #include <netinet/icmp_var.h> 55 #include <netinet/ip_var.h> 56 #include <netinet/tcp.h> 57 #include <netinet/tcpip.h> 58 #include <netinet/tcp_seq.h> 59 #define TCPSTATES 60 #include <netinet/tcp_fsm.h> 61 #include <netinet/tcp_timer.h> 62 #include <netinet/tcp_var.h> 63 #include <netinet/tcp_debug.h> 64 #include <netinet/udp.h> 65 #include <netinet/udp_var.h> 66 67 #include <netdb.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <nlist.h> 71 #include <paths.h> 72 #include "systat.h" 73 #include "extern.h" 74 75 static void enter __P((struct inpcb *, struct socket *, int, char *)); 76 static char *inetname __P((struct in_addr)); 77 static void inetprint __P((struct in_addr *, int, char *)); 78 79 #define streq(a,b) (strcmp(a,b)==0) 80 #define YMAX(w) ((w)->maxy-1) 81 82 WINDOW * 83 opennetstat() 84 { 85 sethostent(1); 86 setnetent(1); 87 return (subwin(stdscr, LINES-5-1, 0, 5, 0)); 88 } 89 90 struct netinfo { 91 struct netinfo *ni_forw, *ni_prev; 92 short ni_line; /* line on screen */ 93 short ni_seen; /* 0 when not present in list */ 94 short ni_flags; 95 #define NIF_LACHG 0x1 /* local address changed */ 96 #define NIF_FACHG 0x2 /* foreign address changed */ 97 short ni_state; /* tcp state */ 98 char *ni_proto; /* protocol */ 99 struct in_addr ni_laddr; /* local address */ 100 long ni_lport; /* local port */ 101 struct in_addr ni_faddr; /* foreign address */ 102 long ni_fport; /* foreign port */ 103 long ni_rcvcc; /* rcv buffer character count */ 104 long ni_sndcc; /* snd buffer character count */ 105 }; 106 107 static struct { 108 struct netinfo *ni_forw, *ni_prev; 109 } netcb; 110 111 static int aflag = 0; 112 static int nflag = 0; 113 static int lastrow = 1; 114 static void enter(), inetprint(); 115 static char *inetname(); 116 117 void 118 closenetstat(w) 119 WINDOW *w; 120 { 121 register struct netinfo *p; 122 123 endhostent(); 124 endnetent(); 125 p = (struct netinfo *)netcb.ni_forw; 126 while (p != (struct netinfo *)&netcb) { 127 if (p->ni_line != -1) 128 lastrow--; 129 p->ni_line = -1; 130 p = p->ni_forw; 131 } 132 if (w != NULL) { 133 wclear(w); 134 wrefresh(w); 135 delwin(w); 136 } 137 } 138 139 static struct nlist namelist[] = { 140 #define X_TCB 0 141 { "_tcb" }, 142 #define X_UDB 1 143 { "_udb" }, 144 { "" }, 145 }; 146 147 int 148 initnetstat() 149 { 150 if (kvm_nlist(kd, namelist)) { 151 nlisterr(namelist); 152 return(0); 153 } 154 if (namelist[X_TCB].n_value == 0) { 155 error("No symbols in namelist"); 156 return(0); 157 } 158 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb; 159 protos = TCP|UDP; 160 return(1); 161 } 162 163 void 164 fetchnetstat() 165 { 166 register struct inpcb *prev, *next; 167 register struct netinfo *p; 168 struct inpcbhead head; 169 struct inpcb inpcb; 170 struct socket sockb; 171 struct tcpcb tcpcb; 172 void *off; 173 int istcp; 174 175 if (namelist[X_TCB].n_value == 0) 176 return; 177 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) 178 p->ni_seen = 0; 179 if (protos&TCP) { 180 off = NPTR(X_TCB); 181 istcp = 1; 182 } 183 else if (protos&UDP) { 184 off = NPTR(X_UDB); 185 istcp = 0; 186 } 187 else { 188 error("No protocols to display"); 189 return; 190 } 191 again: 192 KREAD(off, &head, sizeof (struct inpcbhead)); 193 for (next = head.lh_first; next != NULL; next = inpcb.inp_list.le_next) { 194 KREAD(next, &inpcb, sizeof (inpcb)); 195 if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 196 continue; 197 if (nhosts && !checkhost(&inpcb)) 198 continue; 199 if (nports && !checkport(&inpcb)) 200 continue; 201 KREAD(inpcb.inp_socket, &sockb, sizeof (sockb)); 202 if (istcp) { 203 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb)); 204 enter(&inpcb, &sockb, tcpcb.t_state, "tcp"); 205 } else 206 enter(&inpcb, &sockb, 0, "udp"); 207 } 208 if (istcp && (protos&UDP)) { 209 istcp = 0; 210 off = NPTR(X_UDB); 211 goto again; 212 } 213 } 214 215 static void 216 enter(inp, so, state, proto) 217 register struct inpcb *inp; 218 register struct socket *so; 219 int state; 220 char *proto; 221 { 222 register struct netinfo *p; 223 224 /* 225 * Only take exact matches, any sockets with 226 * previously unbound addresses will be deleted 227 * below in the display routine because they 228 * will appear as ``not seen'' in the kernel 229 * data structures. 230 */ 231 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) { 232 if (!streq(proto, p->ni_proto)) 233 continue; 234 if (p->ni_lport != inp->inp_lport || 235 p->ni_laddr.s_addr != inp->inp_laddr.s_addr) 236 continue; 237 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr && 238 p->ni_fport == inp->inp_fport) 239 break; 240 } 241 if (p == (struct netinfo *)&netcb) { 242 if ((p = malloc(sizeof(*p))) == NULL) { 243 error("Out of memory"); 244 return; 245 } 246 p->ni_prev = (struct netinfo *)&netcb; 247 p->ni_forw = netcb.ni_forw; 248 netcb.ni_forw->ni_prev = p; 249 netcb.ni_forw = p; 250 p->ni_line = -1; 251 p->ni_laddr = inp->inp_laddr; 252 p->ni_lport = inp->inp_lport; 253 p->ni_faddr = inp->inp_faddr; 254 p->ni_fport = inp->inp_fport; 255 p->ni_proto = proto; 256 p->ni_flags = NIF_LACHG|NIF_FACHG; 257 } 258 p->ni_rcvcc = so->so_rcv.sb_cc; 259 p->ni_sndcc = so->so_snd.sb_cc; 260 p->ni_state = state; 261 p->ni_seen = 1; 262 } 263 264 /* column locations */ 265 #define LADDR 0 266 #define FADDR LADDR+23 267 #define PROTO FADDR+23 268 #define RCVCC PROTO+6 269 #define SNDCC RCVCC+7 270 #define STATE SNDCC+7 271 272 273 void 274 labelnetstat() 275 { 276 if (namelist[X_TCB].n_type == 0) 277 return; 278 wmove(wnd, 0, 0); wclrtobot(wnd); 279 mvwaddstr(wnd, 0, LADDR, "Local Address"); 280 mvwaddstr(wnd, 0, FADDR, "Foreign Address"); 281 mvwaddstr(wnd, 0, PROTO, "Proto"); 282 mvwaddstr(wnd, 0, RCVCC, "Recv-Q"); 283 mvwaddstr(wnd, 0, SNDCC, "Send-Q"); 284 mvwaddstr(wnd, 0, STATE, "(state)"); 285 } 286 287 void 288 shownetstat() 289 { 290 register struct netinfo *p, *q; 291 292 /* 293 * First, delete any connections that have gone 294 * away and adjust the position of connections 295 * below to reflect the deleted line. 296 */ 297 p = netcb.ni_forw; 298 while (p != (struct netinfo *)&netcb) { 299 if (p->ni_line == -1 || p->ni_seen) { 300 p = p->ni_forw; 301 continue; 302 } 303 wmove(wnd, p->ni_line, 0); wdeleteln(wnd); 304 q = netcb.ni_forw; 305 for (; q != (struct netinfo *)&netcb; q = q->ni_forw) 306 if (q != p && q->ni_line > p->ni_line) { 307 q->ni_line--; 308 /* this shouldn't be necessary */ 309 q->ni_flags |= NIF_LACHG|NIF_FACHG; 310 } 311 lastrow--; 312 q = p->ni_forw; 313 p->ni_prev->ni_forw = p->ni_forw; 314 p->ni_forw->ni_prev = p->ni_prev; 315 free(p); 316 p = q; 317 } 318 /* 319 * Update existing connections and add new ones. 320 */ 321 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) { 322 if (p->ni_line == -1) { 323 /* 324 * Add a new entry if possible. 325 */ 326 if (lastrow > YMAX(wnd)) 327 continue; 328 p->ni_line = lastrow++; 329 p->ni_flags |= NIF_LACHG|NIF_FACHG; 330 } 331 if (p->ni_flags & NIF_LACHG) { 332 wmove(wnd, p->ni_line, LADDR); 333 inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto); 334 p->ni_flags &= ~NIF_LACHG; 335 } 336 if (p->ni_flags & NIF_FACHG) { 337 wmove(wnd, p->ni_line, FADDR); 338 inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto); 339 p->ni_flags &= ~NIF_FACHG; 340 } 341 mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto); 342 mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc); 343 mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc); 344 if (streq(p->ni_proto, "tcp")) 345 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES) 346 mvwprintw(wnd, p->ni_line, STATE, "%d", 347 p->ni_state); 348 else 349 mvwaddstr(wnd, p->ni_line, STATE, 350 tcpstates[p->ni_state]); 351 wclrtoeol(wnd); 352 } 353 if (lastrow < YMAX(wnd)) { 354 wmove(wnd, lastrow, 0); wclrtobot(wnd); 355 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */ 356 } 357 } 358 359 /* 360 * Pretty print an Internet address (net address + port). 361 * If the nflag was specified, use numbers instead of names. 362 */ 363 static void 364 inetprint(in, port, proto) 365 register struct in_addr *in; 366 int port; 367 char *proto; 368 { 369 struct servent *sp = 0; 370 char line[80], *cp, *index(); 371 372 sprintf(line, "%.*s.", 16, inetname(*in)); 373 cp = index(line, '\0'); 374 if (!nflag && port) 375 sp = getservbyport(port, proto); 376 if (sp || port == 0) 377 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 378 else 379 sprintf(cp, "%d", ntohs((u_short)port)); 380 /* pad to full column to clear any garbage */ 381 cp = index(line, '\0'); 382 while (cp - line < 22) 383 *cp++ = ' '; 384 *cp = '\0'; 385 waddstr(wnd, line); 386 } 387 388 /* 389 * Construct an Internet address representation. 390 * If the nflag has been supplied, give 391 * numeric value, otherwise try for symbolic name. 392 */ 393 static char * 394 inetname(in) 395 struct in_addr in; 396 { 397 char *cp = 0; 398 static char line[50]; 399 struct hostent *hp; 400 struct netent *np; 401 402 if (!nflag && in.s_addr != INADDR_ANY) { 403 int net = inet_netof(in); 404 int lna = inet_lnaof(in); 405 406 if (lna == INADDR_ANY) { 407 np = getnetbyaddr(net, AF_INET); 408 if (np) 409 cp = np->n_name; 410 } 411 if (cp == 0) { 412 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); 413 if (hp) 414 cp = hp->h_name; 415 } 416 } 417 if (in.s_addr == INADDR_ANY) 418 strcpy(line, "*"); 419 else if (cp) 420 strcpy(line, cp); 421 else { 422 in.s_addr = ntohl(in.s_addr); 423 #define C(x) ((x) & 0xff) 424 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 425 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); 426 } 427 return (line); 428 } 429 430 int 431 cmdnetstat(cmd, args) 432 char *cmd, *args; 433 { 434 register struct netinfo *p; 435 436 if (prefix(cmd, "all")) { 437 aflag = !aflag; 438 goto fixup; 439 } 440 if (prefix(cmd, "numbers") || prefix(cmd, "names")) { 441 int new; 442 443 new = prefix(cmd, "numbers"); 444 if (new == nflag) 445 return (1); 446 p = netcb.ni_forw; 447 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) { 448 if (p->ni_line == -1) 449 continue; 450 p->ni_flags |= NIF_LACHG|NIF_FACHG; 451 } 452 nflag = new; 453 goto redisplay; 454 } 455 if (!netcmd(cmd, args)) 456 return (0); 457 fixup: 458 fetchnetstat(); 459 redisplay: 460 shownetstat(); 461 refresh(); 462 return (1); 463 } 464