Annotation of src/usr.bin/systat/netstat.c, Revision 1.11
1.11 ! angelos 1: /* $OpenBSD: netstat.c,v 1.10 1997/12/19 09:36:50 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: netstat.c,v 1.3 1995/06/18 23:53:07 cgd Exp $ */
3:
4: /*-
5: * Copyright (c) 1980, 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
40: #endif
1.11 ! angelos 41: static char rcsid[] = "$OpenBSD: netstat.c,v 1.10 1997/12/19 09:36:50 deraadt Exp $";
1.1 deraadt 42: #endif /* not lint */
43:
44: /*
45: * netstat
46: */
47: #include <sys/param.h>
48: #include <sys/socket.h>
49: #include <sys/socketvar.h>
50: #include <sys/mbuf.h>
51: #include <sys/protosw.h>
52:
53: #include <netinet/in.h>
54: #include <net/route.h>
55: #include <netinet/in_systm.h>
56: #include <netinet/ip.h>
57: #include <netinet/in_pcb.h>
58: #include <netinet/ip_icmp.h>
59: #include <netinet/icmp_var.h>
60: #include <netinet/ip_var.h>
61: #include <netinet/tcp.h>
62: #include <netinet/tcpip.h>
63: #include <netinet/tcp_seq.h>
64: #define TCPSTATES
65: #include <netinet/tcp_fsm.h>
66: #include <netinet/tcp_timer.h>
67: #include <netinet/tcp_var.h>
68: #include <netinet/tcp_debug.h>
69: #include <netinet/udp.h>
70: #include <netinet/udp_var.h>
1.7 millert 71: #include <arpa/inet.h>
1.1 deraadt 72:
73: #include <netdb.h>
74: #include <stdlib.h>
75: #include <string.h>
76: #include <nlist.h>
77: #include <paths.h>
78: #include "systat.h"
79: #include "extern.h"
80:
81: static void enter __P((struct inpcb *, struct socket *, int, char *));
82: static char *inetname __P((struct in_addr));
83: static void inetprint __P((struct in_addr *, int, char *));
84:
85: #define streq(a,b) (strcmp(a,b)==0)
1.2 mickey 86: #define YMAX(w) ((w)->_maxy-1)
1.1 deraadt 87:
88: WINDOW *
89: opennetstat()
90: {
91: sethostent(1);
92: setnetent(1);
93: return (subwin(stdscr, LINES-5-1, 0, 5, 0));
94: }
95:
96: struct netinfo {
1.11 ! angelos 97: struct netinfo *nif_forw, *nif_prev;
! 98: short nif_line; /* line on screen */
! 99: short nif_seen; /* 0 when not present in list */
! 100: short nif_flags;
1.1 deraadt 101: #define NIF_LACHG 0x1 /* local address changed */
102: #define NIF_FACHG 0x2 /* foreign address changed */
1.11 ! angelos 103: short nif_state; /* tcp state */
! 104: char *nif_proto; /* protocol */
! 105: struct in_addr nif_laddr; /* local address */
! 106: long nif_lport; /* local port */
! 107: struct in_addr nif_faddr; /* foreign address */
! 108: long nif_fport; /* foreign port */
! 109: long nif_rcvcc; /* rcv buffer character count */
! 110: long nif_sndcc; /* snd buffer character count */
1.1 deraadt 111: };
112:
113: static struct {
1.11 ! angelos 114: struct netinfo *nif_forw, *nif_prev;
1.1 deraadt 115: } netcb;
116:
117: static int aflag = 0;
118: static int nflag = 0;
119: static int lastrow = 1;
120: static void enter(), inetprint();
121: static char *inetname();
122:
123: void
124: closenetstat(w)
125: WINDOW *w;
126: {
127: register struct netinfo *p;
128:
129: endhostent();
130: endnetent();
1.11 ! angelos 131: p = (struct netinfo *)netcb.nif_forw;
1.1 deraadt 132: while (p != (struct netinfo *)&netcb) {
1.11 ! angelos 133: if (p->nif_line != -1)
1.1 deraadt 134: lastrow--;
1.11 ! angelos 135: p->nif_line = -1;
! 136: p = p->nif_forw;
1.1 deraadt 137: }
138: if (w != NULL) {
139: wclear(w);
140: wrefresh(w);
141: delwin(w);
142: }
143: }
144:
145: static struct nlist namelist[] = {
146: #define X_TCBTABLE 0
147: { "_tcbtable" },
148: #define X_UDBTABLE 1
149: { "_udbtable" },
150: { "" },
151: };
152:
153: int
154: initnetstat()
155: {
156: if (kvm_nlist(kd, namelist)) {
157: nlisterr(namelist);
158: return(0);
159: }
160: if (namelist[X_TCBTABLE].n_value == 0) {
161: error("No symbols in namelist");
162: return(0);
163: }
1.11 ! angelos 164: netcb.nif_forw = netcb.nif_prev = (struct netinfo *)&netcb;
1.1 deraadt 165: protos = TCP|UDP;
166: return(1);
167: }
168:
169: void
170: fetchnetstat()
171: {
172: struct inpcbtable pcbtable;
173: register struct inpcb *head, *prev, *next;
174: register struct netinfo *p;
175: struct inpcb inpcb;
176: struct socket sockb;
177: struct tcpcb tcpcb;
178: void *off;
179: int istcp;
180:
181: if (namelist[X_TCBTABLE].n_value == 0)
182: return;
1.11 ! angelos 183: for (p = netcb.nif_forw; p != (struct netinfo *)&netcb; p = p->nif_forw)
! 184: p->nif_seen = 0;
1.1 deraadt 185: if (protos&TCP) {
186: off = NPTR(X_TCBTABLE);
187: istcp = 1;
188: }
189: else if (protos&UDP) {
190: off = NPTR(X_UDBTABLE);
191: istcp = 0;
192: }
193: else {
194: error("No protocols to display");
195: return;
196: }
197: again:
198: KREAD(off, &pcbtable, sizeof (struct inpcbtable));
199: prev = head = (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue;
200: next = pcbtable.inpt_queue.cqh_first;
201: while (next != head) {
202: KREAD(next, &inpcb, sizeof (inpcb));
203: if (inpcb.inp_queue.cqe_prev != prev) {
204: printf("prev = %x, head = %x, next = %x, inpcb...prev = %x\n", prev, head, next, inpcb.inp_queue.cqe_prev);
1.11 ! angelos 205: p = netcb.nif_forw;
! 206: for (; p != (struct netinfo *)&netcb; p = p->nif_forw)
! 207: p->nif_seen = 1;
1.1 deraadt 208: error("Kernel state in transition");
209: return;
210: }
211: prev = next;
212: next = inpcb.inp_queue.cqe_next;
213:
214: if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
215: continue;
216: if (nhosts && !checkhost(&inpcb))
217: continue;
218: if (nports && !checkport(&inpcb))
219: continue;
220: KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
221: if (istcp) {
222: KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
223: enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
224: } else
225: enter(&inpcb, &sockb, 0, "udp");
226: }
227: if (istcp && (protos&UDP)) {
228: istcp = 0;
229: off = NPTR(X_UDBTABLE);
230: goto again;
231: }
232: }
233:
234: static void
235: enter(inp, so, state, proto)
236: register struct inpcb *inp;
237: register struct socket *so;
238: int state;
239: char *proto;
240: {
241: register struct netinfo *p;
242:
243: /*
244: * Only take exact matches, any sockets with
245: * previously unbound addresses will be deleted
246: * below in the display routine because they
247: * will appear as ``not seen'' in the kernel
248: * data structures.
249: */
1.11 ! angelos 250: for (p = netcb.nif_forw;
! 251: p != (struct netinfo *)&netcb;
! 252: p = p->nif_forw) {
! 253: if (!streq(proto, p->nif_proto))
1.1 deraadt 254: continue;
1.11 ! angelos 255: if (p->nif_lport != inp->inp_lport ||
! 256: p->nif_laddr.s_addr != inp->inp_laddr.s_addr)
1.1 deraadt 257: continue;
1.11 ! angelos 258: if (p->nif_faddr.s_addr == inp->inp_faddr.s_addr &&
! 259: p->nif_fport == inp->inp_fport)
1.1 deraadt 260: break;
261: }
262: if (p == (struct netinfo *)&netcb) {
263: if ((p = malloc(sizeof(*p))) == NULL) {
264: error("Out of memory");
265: return;
266: }
1.11 ! angelos 267: p->nif_prev = (struct netinfo *)&netcb;
! 268: p->nif_forw = netcb.nif_forw;
! 269: netcb.nif_forw->nif_prev = p;
! 270: netcb.nif_forw = p;
! 271: p->nif_line = -1;
! 272: p->nif_laddr = inp->inp_laddr;
! 273: p->nif_lport = inp->inp_lport;
! 274: p->nif_faddr = inp->inp_faddr;
! 275: p->nif_fport = inp->inp_fport;
! 276: p->nif_proto = proto;
! 277: p->nif_flags = NIF_LACHG|NIF_FACHG;
! 278: }
! 279: p->nif_rcvcc = so->so_rcv.sb_cc;
! 280: p->nif_sndcc = so->so_snd.sb_cc;
! 281: p->nif_state = state;
! 282: p->nif_seen = 1;
1.1 deraadt 283: }
284:
285: /* column locations */
286: #define LADDR 0
287: #define FADDR LADDR+23
288: #define PROTO FADDR+23
289: #define RCVCC PROTO+6
290: #define SNDCC RCVCC+7
291: #define STATE SNDCC+7
292:
293:
294: void
295: labelnetstat()
296: {
297: if (namelist[X_TCBTABLE].n_type == 0)
298: return;
299: wmove(wnd, 0, 0); wclrtobot(wnd);
300: mvwaddstr(wnd, 0, LADDR, "Local Address");
301: mvwaddstr(wnd, 0, FADDR, "Foreign Address");
302: mvwaddstr(wnd, 0, PROTO, "Proto");
303: mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
304: mvwaddstr(wnd, 0, SNDCC, "Send-Q");
305: mvwaddstr(wnd, 0, STATE, "(state)");
306: }
307:
308: void
309: shownetstat()
310: {
311: register struct netinfo *p, *q;
312:
313: /*
314: * First, delete any connections that have gone
315: * away and adjust the position of connections
316: * below to reflect the deleted line.
317: */
1.11 ! angelos 318: p = netcb.nif_forw;
1.1 deraadt 319: while (p != (struct netinfo *)&netcb) {
1.11 ! angelos 320: if (p->nif_line == -1 || p->nif_seen) {
! 321: p = p->nif_forw;
1.1 deraadt 322: continue;
323: }
1.11 ! angelos 324: wmove(wnd, p->nif_line, 0); wdeleteln(wnd);
! 325: q = netcb.nif_forw;
! 326: for (; q != (struct netinfo *)&netcb; q = q->nif_forw)
! 327: if (q != p && q->nif_line > p->nif_line) {
! 328: q->nif_line--;
1.1 deraadt 329: /* this shouldn't be necessary */
1.11 ! angelos 330: q->nif_flags |= NIF_LACHG|NIF_FACHG;
1.1 deraadt 331: }
332: lastrow--;
1.11 ! angelos 333: q = p->nif_forw;
! 334: p->nif_prev->nif_forw = p->nif_forw;
! 335: p->nif_forw->nif_prev = p->nif_prev;
1.1 deraadt 336: free(p);
337: p = q;
338: }
339: /*
340: * Update existing connections and add new ones.
341: */
1.11 ! angelos 342: for (p = netcb.nif_forw;
! 343: p != (struct netinfo *)&netcb;
! 344: p = p->nif_forw) {
! 345: if (p->nif_line == -1) {
1.1 deraadt 346: /*
347: * Add a new entry if possible.
348: */
349: if (lastrow > YMAX(wnd))
350: continue;
1.11 ! angelos 351: p->nif_line = lastrow++;
! 352: p->nif_flags |= NIF_LACHG|NIF_FACHG;
1.1 deraadt 353: }
1.11 ! angelos 354: if (p->nif_flags & NIF_LACHG) {
! 355: wmove(wnd, p->nif_line, LADDR);
! 356: inetprint(&p->nif_laddr, p->nif_lport, p->nif_proto);
! 357: p->nif_flags &= ~NIF_LACHG;
1.1 deraadt 358: }
1.11 ! angelos 359: if (p->nif_flags & NIF_FACHG) {
! 360: wmove(wnd, p->nif_line, FADDR);
! 361: inetprint(&p->nif_faddr, p->nif_fport, p->nif_proto);
! 362: p->nif_flags &= ~NIF_FACHG;
1.1 deraadt 363: }
1.11 ! angelos 364: mvwaddstr(wnd, p->nif_line, PROTO, p->nif_proto);
! 365: mvwprintw(wnd, p->nif_line, RCVCC, "%6d", p->nif_rcvcc);
! 366: mvwprintw(wnd, p->nif_line, SNDCC, "%6d", p->nif_sndcc);
! 367: if (streq(p->nif_proto, "tcp"))
! 368: if (p->nif_state < 0 || p->nif_state >= TCP_NSTATES)
! 369: mvwprintw(wnd, p->nif_line, STATE, "%d",
! 370: p->nif_state);
1.1 deraadt 371: else
1.11 ! angelos 372: mvwaddstr(wnd, p->nif_line, STATE,
! 373: tcpstates[p->nif_state]);
1.1 deraadt 374: wclrtoeol(wnd);
375: }
376: if (lastrow < YMAX(wnd)) {
377: wmove(wnd, lastrow, 0); wclrtobot(wnd);
378: wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
379: }
380: }
381:
382: /*
383: * Pretty print an Internet address (net address + port).
384: * If the nflag was specified, use numbers instead of names.
385: */
386: static void
387: inetprint(in, port, proto)
388: register struct in_addr *in;
389: int port;
390: char *proto;
391: {
392: struct servent *sp = 0;
1.6 millert 393: char line[80], *cp;
1.1 deraadt 394:
1.8 deraadt 395: snprintf(line, sizeof line, "%.*s.", 16, inetname(*in));
1.6 millert 396: cp = strchr(line, '\0');
1.1 deraadt 397: if (!nflag && port)
398: sp = getservbyport(port, proto);
399: if (sp || port == 0)
1.8 deraadt 400: snprintf(cp, sizeof line - strlen(cp), "%.8s",
401: sp ? sp->s_name : "*");
1.1 deraadt 402: else
1.8 deraadt 403: snprintf(cp, sizeof line - strlen(cp), "%d",
404: ntohs((u_short)port));
1.1 deraadt 405: /* pad to full column to clear any garbage */
1.6 millert 406: cp = strchr(line, '\0');
1.10 deraadt 407: while (cp - line < 22 && cp - line < sizeof line-1)
1.1 deraadt 408: *cp++ = ' ';
409: *cp = '\0';
410: waddstr(wnd, line);
411: }
412:
413: /*
414: * Construct an Internet address representation.
415: * If the nflag has been supplied, give
416: * numeric value, otherwise try for symbolic name.
417: */
418: static char *
419: inetname(in)
420: struct in_addr in;
421: {
422: char *cp = 0;
423: static char line[50];
424: struct hostent *hp;
425: struct netent *np;
426:
427: if (!nflag && in.s_addr != INADDR_ANY) {
428: int net = inet_netof(in);
429: int lna = inet_lnaof(in);
430:
431: if (lna == INADDR_ANY) {
432: np = getnetbyaddr(net, AF_INET);
433: if (np)
434: cp = np->n_name;
435: }
436: if (cp == 0) {
437: hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
438: if (hp)
439: cp = hp->h_name;
440: }
441: }
1.9 deraadt 442: if (in.s_addr == INADDR_ANY) {
443: strncpy(line, "*", sizeof line-1);
444: line[sizeof line-1] = '\0';
445: } else if (cp) {
446: strncpy(line, cp, sizeof line-1);
447: line[sizeof line-1] = '\0';
448: } else {
1.1 deraadt 449: in.s_addr = ntohl(in.s_addr);
450: #define C(x) ((x) & 0xff)
1.8 deraadt 451: snprintf(line, sizeof line, "%u.%u.%u.%u", C(in.s_addr >> 24),
1.1 deraadt 452: C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
453: }
454: return (line);
455: }
456:
457: int
458: cmdnetstat(cmd, args)
459: char *cmd, *args;
460: {
461: register struct netinfo *p;
462:
463: if (prefix(cmd, "all")) {
464: aflag = !aflag;
465: goto fixup;
466: }
467: if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
468: int new;
469:
470: new = prefix(cmd, "numbers");
471: if (new == nflag)
472: return (1);
1.11 ! angelos 473: p = netcb.nif_forw;
! 474: for (; p != (struct netinfo *)&netcb; p = p->nif_forw) {
! 475: if (p->nif_line == -1)
1.1 deraadt 476: continue;
1.11 ! angelos 477: p->nif_flags |= NIF_LACHG|NIF_FACHG;
1.1 deraadt 478: }
479: nflag = new;
1.4 deraadt 480: wclear(wnd);
481: labelnetstat();
1.1 deraadt 482: goto redisplay;
483: }
484: if (!netcmd(cmd, args))
485: return (0);
486: fixup:
487: fetchnetstat();
488: redisplay:
489: shownetstat();
490: refresh();
491: return (1);
492: }
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