/* * 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. * * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved. * @(#)main.c 8.4 (Berkeley) 3/1/94 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $ * $DragonFly: src/usr.bin/netstat/main.c,v 1.10 2005/08/04 17:31:23 drhodus Exp $ */ #include #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"}, #define N_NGSOCKS 27 { "_ngsocklist"}, #define N_IP6STAT 28 { "_ip6stat" }, #define N_ICMP6STAT 29 { "_icmp6stat" }, #define N_IPSECSTAT 30 { "_ipsecstat" }, #define N_IPSEC6STAT 31 { "_ipsec6stat" }, #define N_PIM6STAT 32 { "_pim6stat" }, #define N_MRT6PROTO 33 { "_ip6_mrtproto" }, #define N_MRT6STAT 34 { "_mrt6stat" }, #define N_MF6CTABLE 35 { "_mf6ctable" }, #define N_MIF6TABLE 36 { "_mif6table" }, #define N_PFKEYSTAT 37 { "_pfkeystat" }, #define N_MBSTAT 38 { "_mbstat" }, #define N_MBTYPES 39 { "_mbtypes" }, #define N_NMBCLUSTERS 40 { "_nmbclusters" }, #define N_NMBUFS 41 { "_nmbufs" }, #define N_RTTRASH 42 { "_rttrash" }, { "" }, }; 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)(u_long, char *, int); /* control blocks printing routine */ void (*pr_stats)(u_long, char *, int); /* statistics printing routine */ void (*pr_istats)(char *); /* per/if 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, NULL, "tcp", IPPROTO_TCP }, { -1, -1, 1, protopr, udp_stats, NULL, "udp", IPPROTO_UDP }, { -1, -1, 1, protopr, NULL, NULL, "divert",IPPROTO_DIVERT }, { -1, -1, 1, protopr, ip_stats, NULL, "ip", IPPROTO_RAW }, { -1, -1, 1, protopr, icmp_stats, NULL, "icmp", IPPROTO_ICMP }, { -1, -1, 1, protopr, igmp_stats, NULL, "igmp", IPPROTO_IGMP }, #ifdef IPSEC { -1, N_IPSECSTAT, 1, 0, ipsec_stats, NULL, "ipsec", 0}, #endif { -1, -1, 1, 0, bdg_stats, NULL, "bdg", 1 /* bridging... */ }, { -1, -1, 0, 0, 0, NULL, 0 } }; #ifdef INET6 struct protox ip6protox[] = { { -1, -1, 1, protopr, tcp_stats, NULL, "tcp", IPPROTO_TCP }, { -1, -1, 1, protopr, udp_stats, NULL, "udp", IPPROTO_UDP }, { -1, N_IP6STAT, 1, protopr, ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW }, { -1, N_ICMP6STAT, 1, protopr, icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 }, #ifdef IPSEC { -1, N_IPSEC6STAT, 1, 0, ipsec_stats, NULL, "ipsec6",0 }, #endif #ifdef notyet { -1, N_PIM6STAT, 1, 0, pim6_stats, NULL, "pim6", 0 }, #endif { -1, -1, 1, 0, rip6_stats, NULL, "rip6", 0 }, { -1, -1, 1, 0, bdg_stats, NULL, "bdg", 1 /* bridging... */ }, { -1, -1, 1, protopr, pim_stats, NULL, "pim", IPPROTO_PIM }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #endif /*INET6*/ #ifdef IPSEC struct protox pfkeyprotox[] = { { -1, N_PFKEYSTAT, 1, 0, pfkey_stats, NULL, "pfkey", 0 }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #endif struct protox atalkprotox[] = { { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, ddp_stats, NULL, "ddp" }, { -1, -1, 0, 0, 0, NULL, 0 } }; struct protox netgraphprotox[] = { { N_NGSOCKS, -1, 1, netgraphprotopr, NULL, NULL, "ctrl" }, { N_NGSOCKS, -1, 1, netgraphprotopr, NULL, NULL, "data" }, { -1, NULL, 0, 0, 0, NULL, 0 } }; struct protox ipxprotox[] = { { N_IPX, N_IPXSTAT, 1, ipxprotopr, ipx_stats, NULL, "ipx", 0 }, { N_IPX, N_SPXSTAT, 1, ipxprotopr, spx_stats, NULL, "spx", 0 }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #ifdef NS struct protox nsprotox[] = { { N_IDP, N_IDPSTAT, 1, nsprotopr, idp_stats, NULL, "idp" }, { N_IDP, N_SPPSTAT, 1, nsprotopr, spp_stats, NULL, "spp" }, { -1, N_NSERR, 1, 0, nserr_stats, NULL, "ns_err" }, { -1, -1, 0, 0, 0, NULL, 0 } }; #endif #ifdef ISO struct protox isoprotox[] = { { ISO_TP, N_TPSTAT, 1, iso_protopr, tp_stats, NULL, "tp" }, { N_CLTP, N_CLTPSTAT, 1, iso_protopr, cltp_stats, NULL, "cltp" }, { -1, N_CLNPSTAT, 1, 0, clnp_stats, NULL, "clnp"}, { -1, N_ESISSTAT, 1, 0, esis_stats, NULL, "esis"}, { -1, -1, 0, 0, 0, NULL, 0 } }; #endif struct protox *protoprotox[] = { protox, #ifdef INET6 ip6protox, #endif #ifdef IPSEC pfkeyprotox, #endif ipxprotox, atalkprotox, #ifdef NS nsprotox, #endif #ifdef ISO isoprotox, #endif NULL }; static void printproto (struct protox *, char *); static void usage (void); static struct protox *name2protox (char *); static struct protox *knownname (char *); static kvm_t *kvmd; static char *nlistf = NULL, *memf = NULL; int Aflag; /* show addresses of protocol control block */ int aflag; /* show all sockets (including servers) */ int bflag; /* show i/f total bytes in/out */ int dflag; /* show i/f dropped packets */ int gflag; /* show group (multicast) routing or stats */ int iflag; /* show interfaces */ int Lflag; /* show size of listen queues */ int mflag; /* show memory stats */ int Pflag; /* show more protocol info (go past 80 columns) */ int numeric_addr; /* show addresses numerically */ int numeric_port; /* show ports numerically */ static int pflag; /* show given protocol */ int rflag; /* show routing tables (or routing stats) */ int sflag; /* show protocol statistics */ int tflag; /* show i/f watchdog timers */ int Bflag; /* show buffer limit instead of buffer use */ int Wflag; /* wide display */ int zflag; /* zero stats */ int interval; /* repeat interval for i/f stats */ char *interface; /* desired i/f for stats, or NULL for all i/fs */ int unit; /* unit number for above */ int af; /* address family */ int main(int argc, char **argv) { struct protox *tp = NULL; /* for printing cblocks & stats */ int ch; af = AF_UNSPEC; while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -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; #ifdef INET6 else if (strcmp(optarg, "inet6") == 0) af = AF_INET6; #endif /*INET6*/ #ifdef INET6 else if (strcmp(optarg, "pfkey") == 0) af = PF_KEY; #endif /*INET6*/ else if (strcmp(optarg, "unix") == 0) af = AF_UNIX; else if (strcmp(optarg, "atalk") == 0) af = AF_APPLETALK; else if (strcmp(optarg, "ng") == 0 || strcmp(optarg, "netgraph") == 0) af = AF_NETGRAPH; #ifdef ISO else if (strcmp(optarg, "iso") == 0) af = AF_ISO; #endif else if (strcmp(optarg, "link") == 0) af = AF_LINK; 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 'L': Lflag = 1; break; case 'M': memf = optarg; break; case 'm': mflag = 1; break; case 'N': nlistf = optarg; break; case 'n': numeric_addr = numeric_port = 1; break; case 'P': Pflag = 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 'S': numeric_addr = 1; break; case 'B': Bflag = 1; break; case 't': tflag = 1; break; case 'u': af = AF_UNIX; break; case 'W': case 'l': Wflag = 1; break; case 'w': interval = atoi(optarg); iflag = 1; break; case 'z': zflag = 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) { if (memf != NULL) { if (kread(0, 0, 0) == 0) mbpr(nl[N_MBSTAT].n_value, nl[N_MBTYPES].n_value, nl[N_NMBCLUSTERS].n_value, nl[N_NMBUFS].n_value); } else mbpr(0, 0, 0, 0); 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 && !sflag) { kread(0, 0, 0); intpr(interval, nl[N_IFNET].n_value, NULL); exit(0); } if (rflag) { kread(0, 0, 0); if (sflag) rt_stats(); else routepr(nl[N_RTREE].n_value); exit(0); } if (gflag) { kread(0, 0, 0); if (sflag) { if (af == AF_INET || af == AF_UNSPEC) mrt_stats(nl[N_MRTSTAT].n_value); #ifdef INET6 if (af == AF_INET6 || af == AF_UNSPEC) mrt6_stats(nl[N_MRT6STAT].n_value); #endif } else { if (af == AF_INET || af == AF_UNSPEC) mroutepr(nl[N_MFCTABLE].n_value, nl[N_VIFTABLE].n_value); #ifdef INET6 if (af == AF_INET6 || af == AF_UNSPEC) mroute6pr(nl[N_MF6CTABLE].n_value, nl[N_MIF6TABLE].n_value); #endif } exit(0); } kread(0, 0, 0); if (tp) { printproto(tp, tp->pr_name); exit(0); } if (af == AF_INET || af == AF_UNSPEC) for (tp = protox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #ifdef INET6 if (af == AF_INET6 || af == AF_UNSPEC) for (tp = ip6protox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #endif /*INET6*/ #ifdef IPSEC if (af == PF_KEY || af == AF_UNSPEC) for (tp = pfkeyprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #endif /*IPSEC*/ 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); if (af == AF_NETGRAPH || af == AF_UNSPEC) for (tp = netgraphprotox; 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) && !Lflag && !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(struct protox *tp, char *name) { void (*pr)(u_long, char *, int); u_long off; if (sflag) { if (iflag) { if (tp->pr_istats) intpr(interval, nl[N_IFNET].n_value, tp->pr_istats); else if (pflag) printf("%s: no per-interface stats routine\n", tp->pr_name); return; } else { pr = tp->pr_stats; if (!pr) { if (pflag) printf("%s: no stats routine\n", tp->pr_name); return; } off = tp->pr_usesysctl ? tp->pr_usesysctl : nl[tp->pr_sindex].n_value; } } else { pr = tp->pr_cblocks; if (!pr) { if (pflag) printf("%s: no PCB routine\n", tp->pr_name); return; } off = tp->pr_usesysctl ? tp->pr_usesysctl : nl[tp->pr_index].n_value; } if (pr != NULL && (off || af != AF_UNSPEC)) (*pr)(off, name, af); } /* * Read kernel memory, return 0 on success. */ int kread(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(int n) { return (n != 1 ? "s" : ""); } char * plurales(int n) { return (n != 1 ? "es" : ""); } /* * Find the protox for the given "well-known" name. */ static struct protox * knownname(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(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)) != NULL) return (tp); setprotoent(1); /* make protocol lookup cheaper */ while ((p = getprotoent()) != NULL) { /* 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) { (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", "usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n" " [-M core] [-N system]", " netstat -i | -I interface [-abdnt] [-f address_family]\n" " [-M core] [-N system]", " netstat -w wait [-I interface] [-d] [-M core] [-N system]", " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]", " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" " [-M core] [-N system]", " netstat -m [-M core] [-N system]", " netstat -r [-AanW] [-f address_family] [-M core] [-N system]", " netstat -rs [-s] [-M core] [-N system]", " netstat -g [-W] [-f address_family] [-M core] [-N system]", " netstat -gs [-s] [-f address_family] [-M core] [-N system]"); exit(1); }