/* * Copyright (c) 1983, 1988, 1993 * Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint char const copyright[] = "@(#) Copyright (c) 1983, 1988, 1993\n\ Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; #endif static const char rcsid[] = "$Id: main.c,v 1.24 1999/02/06 19:12:48 jhay Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netstat.h" static struct nlist nl[] = { #define N_IFNET 0 { "_ifnet" }, #define N_IMP 1 { "_imp_softc" }, #define N_RTSTAT 2 { "_rtstat" }, #define N_UNIXSW 3 { "_localsw" }, #define N_IDP 4 { "_nspcb"}, #define N_IDPSTAT 5 { "_idpstat"}, #define N_SPPSTAT 6 { "_spp_istat"}, #define N_NSERR 7 { "_ns_errstat"}, #define N_CLNPSTAT 8 { "_clnp_stat"}, #define IN_NOTUSED 9 { "_tp_inpcb" }, #define ISO_TP 10 { "_tp_refinfo" }, #define N_TPSTAT 11 { "_tp_stat" }, #define N_ESISSTAT 12 { "_esis_stat"}, #define N_NIMP 13 { "_nimp"}, #define N_RTREE 14 { "_rt_tables"}, #define N_CLTP 15 { "_cltb"}, #define N_CLTPSTAT 16 { "_cltpstat"}, #define N_NFILE 17 { "_nfile" }, #define N_FILE 18 { "_file" }, #define N_MRTSTAT 19 { "_mrtstat" }, #define N_MFCTABLE 20 { "_mfctable" }, #define N_VIFTABLE 21 { "_viftable" }, #define N_IPX 22 { "_ipxpcb"}, #define N_IPXSTAT 23 { "_ipxstat"}, #define N_SPXSTAT 24 { "_spx_istat"}, #define N_DDPSTAT 25 { "_ddpstat"}, #define N_DDPCB 26 { "_ddpcb"}, { "" }, }; struct protox { u_char pr_index; /* index into nlist of cb head */ u_char pr_sindex; /* index into nlist of stat block */ u_char pr_wanted; /* 1 if wanted, 0 otherwise */ void (*pr_cblocks)(); /* control blocks printing routine */ void (*pr_stats)(); /* statistics printing routine */ char *pr_name; /* well-known name */ int pr_usesysctl; /* true if we use sysctl, not kvm */ } protox[] = { { -1, -1, 1, protopr, tcp_stats, "tcp", IPPROTO_TCP }, { -1, -1, 1, protopr, udp_stats, "udp", IPPROTO_UDP }, { -1, -1, 1, protopr, NULL, "divert", IPPROTO_DIVERT }, { -1, -1, 1, protopr, ip_stats, "ip", IPPROTO_RAW }, { -1, -1, 1, protopr, icmp_stats, "icmp", IPPROTO_ICMP }, { -1, -1, 1, protopr, igmp_stats, "igmp", IPPROTO_IGMP }, { -1, -1, 1, protopr, bdg_stats, "bdg", 1 /* bridging... */ }, { -1, -1, 0, 0, 0, 0 } }; struct protox atalkprotox[] = { { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, ddp_stats, "ddp" }, { -1, -1, 0, 0, 0, 0 } }; struct protox ipxprotox[] = { { N_IPX, N_IPXSTAT, 1, ipxprotopr, ipx_stats, "ipx", 0 }, { N_IPX, N_SPXSTAT, 1, ipxprotopr, spx_stats, "spx", 0 }, { -1, -1, 0, 0, 0, 0, 0 } }; #ifdef NS struct protox nsprotox[] = { { N_IDP, N_IDPSTAT, 1, nsprotopr, idp_stats, "idp" }, { N_IDP, N_SPPSTAT, 1, nsprotopr, spp_stats, "spp" }, { -1, N_NSERR, 1, 0, nserr_stats, "ns_err" }, { -1, -1, 0, 0, 0, 0 } }; #endif #ifdef ISO struct protox isoprotox[] = { { ISO_TP, N_TPSTAT, 1, iso_protopr, tp_stats, "tp" }, { N_CLTP, N_CLTPSTAT, 1, iso_protopr, cltp_stats, "cltp" }, { -1, N_CLNPSTAT, 1, 0, clnp_stats, "clnp"}, { -1, N_ESISSTAT, 1, 0, esis_stats, "esis"}, { -1, -1, 0, 0, 0, 0 } }; #endif struct protox *protoprotox[] = { protox, ipxprotox, atalkprotox, #ifdef NS nsprotox, #endif #ifdef ISO isoprotox, #endif NULL }; static void printproto __P((struct protox *, char *)); static void usage __P((void)); static struct protox *name2protox __P((char *)); static struct protox *knownname __P((char *)); static kvm_t *kvmd; char *nlistf = NULL, *memf = NULL; int main(argc, argv) int argc; char *argv[]; { register struct protoent *p; register struct protox *tp; /* for printing cblocks & stats */ int ch; af = AF_UNSPEC; while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != -1) switch(ch) { case 'A': Aflag = 1; break; case 'a': aflag = 1; break; case 'b': bflag = 1; break; case 'd': dflag = 1; break; case 'f': #ifdef NS if (strcmp(optarg, "ns") == 0) af = AF_NS; else #endif if (strcmp(optarg, "ipx") == 0) af = AF_IPX; else if (strcmp(optarg, "inet") == 0) af = AF_INET; else if (strcmp(optarg, "unix") == 0) af = AF_UNIX; else if (strcmp(optarg, "atalk") == 0) af = AF_APPLETALK; #ifdef ISO else if (strcmp(optarg, "iso") == 0) af = AF_ISO; #endif else { errx(1, "%s: unknown address family", optarg); } break; case 'g': gflag = 1; break; case 'I': { char *cp; iflag = 1; for (cp = interface = optarg; isalpha(*cp); cp++) continue; unit = atoi(cp); break; } case 'i': iflag = 1; break; case 'M': memf = optarg; break; case 'm': mflag = 1; break; case 'N': nlistf = optarg; break; case 'n': nflag = 1; break; case 'p': if ((tp = name2protox(optarg)) == NULL) { errx(1, "%s: unknown or uninstrumented protocol", optarg); } pflag = 1; break; case 'r': rflag = 1; break; case 's': ++sflag; break; case 't': tflag = 1; break; case 'u': af = AF_UNIX; break; case 'w': interval = atoi(optarg); iflag = 1; break; case '?': default: usage(); } argv += optind; argc -= optind; #define BACKWARD_COMPATIBILITY #ifdef BACKWARD_COMPATIBILITY if (*argv) { if (isdigit(**argv)) { interval = atoi(*argv); if (interval <= 0) usage(); ++argv; iflag = 1; } if (*argv) { nlistf = *argv; if (*++argv) memf = *argv; } } #endif /* * Discard setgid privileges if not the running kernel so that bad * guys can't print interesting stuff from kernel memory. */ if (nlistf != NULL || memf != NULL) setgid(getgid()); if (mflag) { mbpr(); exit(0); } if (pflag) { if (!tp->pr_stats) { printf("%s: no stats routine\n", tp->pr_name); exit(0); } if (tp->pr_usesysctl) { (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name); } else { kread(0, 0, 0); (*tp->pr_stats)(nl[tp->pr_sindex].n_value, tp->pr_name); } exit(0); } #if 0 /* * Keep file descriptors open to avoid overhead * of open/close on each call to get* routines. */ sethostent(1); setnetent(1); #else /* * This does not make sense any more with DNS being default over * the files. Doing a setXXXXent(1) causes a tcp connection to be * used for the queries, which is slower. */ #endif if (iflag) { kread(0, 0, 0); intpr(interval, nl[N_IFNET].n_value); exit(0); } if (rflag) { kread(0, 0, 0); if (sflag) rt_stats(nl[N_RTSTAT].n_value); else routepr(nl[N_RTREE].n_value); exit(0); } if (gflag) { kread(0, 0, 0); if (sflag) mrt_stats(nl[N_MRTSTAT].n_value); else mroutepr(nl[N_MFCTABLE].n_value, nl[N_VIFTABLE].n_value); exit(0); } if (af == AF_INET || af == AF_UNSPEC) { setprotoent(1); setservent(1); /* ugh, this is O(MN) ... why do we do this? */ while ((p = getprotoent())) { for (tp = protox; tp->pr_name; tp++) if (strcmp(tp->pr_name, p->p_name) == 0) break; if (tp->pr_name == 0 || tp->pr_wanted == 0) continue; printproto(tp, p->p_name); } endprotoent(); } if (af == AF_IPX || af == AF_UNSPEC) { kread(0, 0, 0); for (tp = ipxprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); } if (af == AF_APPLETALK || af == AF_UNSPEC) for (tp = atalkprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #ifdef NS if (af == AF_NS || af == AF_UNSPEC) for (tp = nsprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #endif #ifdef ISO if (af == AF_ISO || af == AF_UNSPEC) for (tp = isoprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #endif if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) unixpr(); exit(0); } /* * Print out protocol statistics or control blocks (per sflag). * If the interface was not specifically requested, and the symbol * is not in the namelist, ignore this one. */ static void printproto(tp, name) register struct protox *tp; char *name; { void (*pr)(); u_long off; if (sflag) { pr = tp->pr_stats; off = tp->pr_usesysctl ? tp->pr_usesysctl : nl[tp->pr_sindex].n_value; } else { pr = tp->pr_cblocks; off = tp->pr_usesysctl ? tp->pr_usesysctl : nl[tp->pr_index].n_value; } if (pr != NULL && (off || af != AF_UNSPEC)) (*pr)(off, name); } /* * Read kernel memory, return 0 on success. */ int kread(addr, buf, size) u_long addr; char *buf; int size; { if (kvmd == 0) { /* * XXX. */ kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); if (kvmd != NULL) { if (kvm_nlist(kvmd, nl) < 0) { if(nlistf) errx(1, "%s: kvm_nlist: %s", nlistf, kvm_geterr(kvmd)); else errx(1, "kvm_nlist: %s", kvm_geterr(kvmd)); } if (nl[0].n_type == 0) { if(nlistf) errx(1, "%s: no namelist", nlistf); else errx(1, "no namelist"); } } else { warnx("kvm not available"); return(-1); } } if (!buf) return (0); if (kvm_read(kvmd, addr, buf, size) != size) { warnx("%s", kvm_geterr(kvmd)); return (-1); } return (0); } char * plural(n) int n; { return (n != 1 ? "s" : ""); } char * plurales(n) int n; { return (n != 1 ? "es" : ""); } /* * Find the protox for the given "well-known" name. */ static struct protox * knownname(name) char *name; { struct protox **tpp, *tp; for (tpp = protoprotox; *tpp; tpp++) for (tp = *tpp; tp->pr_name; tp++) if (strcmp(tp->pr_name, name) == 0) return (tp); return (NULL); } /* * Find the protox corresponding to name. */ static struct protox * name2protox(name) char *name; { struct protox *tp; char **alias; /* alias from p->aliases */ struct protoent *p; /* * Try to find the name in the list of "well-known" names. If that * fails, check if name is an alias for an Internet protocol. */ if ((tp = knownname(name))) return (tp); setprotoent(1); /* make protocol lookup cheaper */ while ((p = getprotoent())) { /* assert: name not same as p->name */ for (alias = p->p_aliases; *alias; alias++) if (strcmp(name, *alias) == 0) { endprotoent(); return (knownname(p->p_name)); } } endprotoent(); return (NULL); } static void usage() { (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", "usage: netstat [-Aan] [-f address_family] [-M core] [-N system]", " netstat [-bdghimnrs] [-f address_family] [-M core] [-N system]", " netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]", " netstat [-M core] [-N system] [-p protocol]"); exit(1); } void trimdomain(cp) char *cp; { static char domain[MAXHOSTNAMELEN + 1]; static int first = 1; char *s; if (first) { first = 0; if (gethostname(domain, MAXHOSTNAMELEN) == 0 && (s = strchr(domain, '.'))) (void) strcpy(domain, s + 1); else domain[0] = 0; } if (domain[0]) { while ((cp = strchr(cp, '.'))) { if (!strcasecmp(cp + 1, domain)) { *cp = 0; /* hit it */ break; } else { cp++; } } } }