/* $NetBSD: main.c,v 1.99.18.1 2022/09/12 14:23:41 martin Exp $ */ /* * 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. 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\ Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; #else __RCSID("$NetBSD: main.c,v 1.99.18.1 2022/09/12 14:23:41 martin Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netstat.h" #include "rtutil.h" #include "prog_ops.h" int Aflag; int aflag; int Bflag; int bflag; int dflag; #ifndef SMALL int gflag; #endif int hflag; int iflag; int Lflag; int lflag; int mflag; int numeric_addr; int numeric_port; int nflag; int Pflag; int pflag; int qflag; int rflag; int sflag; int tagflag; int tflag; int Vflag; int vflag; char *interface; int af; int use_sysctl; int force_sysctl; struct nlist nl[] = { #define N_MBSTAT 0 { "_mbstat", 0, 0, 0, 0 }, #define N_IPSTAT 1 { "_ipstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_TCBTABLE 2 { "_tcbtable", 0, 0, 0, 0 }, #define N_TCPSTAT 3 { "_tcpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_UDBTABLE 4 { "_udbtable", 0, 0, 0, 0 }, #define N_UDPSTAT 5 { "_udpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_IFNET_LIST 6 { "_ifnet_list", 0, 0, 0, 0 }, #define N_ICMPSTAT 7 { "_icmpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_RTSTAT 8 { "_rtstat", 0, 0, 0, 0 }, #define N_UNIXSW 9 { "_unixsw", 0, 0, 0, 0 }, #define N_RTREE 10 { "_rt_tables", 0, 0, 0, 0 }, #define N_NFILE 11 { "_nfile", 0, 0, 0, 0 }, #define N_IGMPSTAT 12 { "_igmpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_MRTPROTO 13 { "_ip_mrtproto", 0, 0, 0, 0 }, #define N_MRTSTAT 14 { "_mrtstat", 0, 0, 0, 0 }, #define N_MFCHASHTBL 15 { "_mfchashtbl", 0, 0, 0, 0 }, #define N_MFCHASH 16 { "_mfchash", 0, 0, 0, 0 }, #define N_VIFTABLE 17 { "_viftable", 0, 0, 0, 0 }, #define N_MSIZE 18 { "_msize", 0, 0, 0, 0 }, #define N_MCLBYTES 19 { "_mclbytes", 0, 0, 0, 0 }, #define N_DDPSTAT 20 { "_ddpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_DDPCB 21 { "_ddpcb", 0, 0, 0, 0 }, #define N_MBPOOL 22 { "_mbpool", 0, 0, 0, 0 }, #define N_MCLPOOL 23 { "_mclpool", 0, 0, 0, 0 }, #define N_IP6STAT 24 { "_ip6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_TCP6STAT 25 { "_tcp6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_UDP6STAT 26 { "_udp6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_ICMP6STAT 27 { "_icmp6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_IPSECSTAT 28 { "_ipsecstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_IPSEC6STAT 29 { "_ipsec6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_PIM6STAT 30 { "_pim6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_MRT6PROTO 31 { "_ip6_mrtproto", 0, 0, 0, 0 }, #define N_MRT6STAT 32 { "_mrt6stat", 0, 0, 0, 0 }, #define N_MF6CTABLE 33 { "_mf6ctable", 0, 0, 0, 0 }, #define N_MIF6TABLE 34 { "_mif6table", 0, 0, 0, 0 }, #define N_PFKEYSTAT 35 { "_pfkeystat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_ARPSTAT 36 { "_arpstat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_RIP6STAT 37 { "_rip6stat", 0, 0, 0, 0 }, /* not available via kvm */ #define N_ARPINTRQ 38 { "_arpintrq", 0, 0, 0, 0 }, #define N_ATINTRQ1 39 { "_atintrq1", 0, 0, 0, 0 }, #define N_ATINTRQ2 40 { "_atintrq2", 0, 0, 0, 0 }, #define N_PPPOEDISCINQ 41 { "_ppoediscinq", 0, 0, 0, 0 }, #define N_PPPOEINQ 42 { "_ppoeinq", 0, 0, 0, 0 }, #define N_HARDCLOCK_TICKS 43 { "_hardclock_ticks", 0, 0, 0, 0 }, #define N_PIMSTAT 44 { "_pimstat", 0, 0, 0, 0 }, #define N_CARPSTAT 45 { "_carpstats", 0, 0, 0, 0 }, /* not available via kvm */ #define N_PFSYNCSTAT 46 { "_pfsyncstats", 0, 0, 0, 0}, /* not available via kvm */ { "", 0, 0, 0, 0 }, }; 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 */ (u_long, const char *); void (*pr_stats) /* statistics printing routine */ (u_long, const char *); void (*pr_istats) /* per/if statistics printing routine */ (const char *); void (*pr_dump) /* PCB state dump routine */ (u_long, const char *, u_long); const char *pr_name; /* well-known name */ } protox[] = { { N_TCBTABLE, N_TCPSTAT, 1, protopr, tcp_stats, NULL, tcp_dump, "tcp" }, { N_UDBTABLE, N_UDPSTAT, 1, protopr, udp_stats, NULL, 0, "udp" }, { -1, N_IPSTAT, 1, 0, ip_stats, NULL, 0, "ip" }, { -1, N_ICMPSTAT, 1, 0, icmp_stats, NULL, 0, "icmp" }, { -1, N_IGMPSTAT, 1, 0, igmp_stats, NULL, 0, "igmp" }, { -1, N_CARPSTAT, 1, 0, carp_stats, NULL, 0, "carp" }, #ifdef IPSEC { -1, N_IPSECSTAT, 1, 0, fast_ipsec_stats, NULL, 0, "ipsec" }, #endif { -1, N_PIMSTAT, 1, 0, pim_stats, NULL, 0, "pim" }, { -1, N_PFSYNCSTAT, 1, 0, pfsync_stats, NULL, 0, "pfsync" }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #ifdef INET6 struct protox ip6protox[] = { { -1, N_IP6STAT, 1, 0, ip6_stats, ip6_ifstats, 0, "ip6" }, { -1, N_ICMP6STAT, 1, 0, icmp6_stats, icmp6_ifstats, 0, "icmp6" }, #ifdef TCP6 { N_TCBTABLE, N_TCP6STAT, 1, ip6protopr, tcp6_stats, NULL, tcp6_dump, "tcp6" }, #else { N_TCBTABLE, N_TCP6STAT, 1, ip6protopr, tcp_stats, NULL, tcp6_dump, "tcp6" }, #endif { N_UDBTABLE, N_UDP6STAT, 1, ip6protopr, udp6_stats, NULL, 0, "udp6" }, #ifdef IPSEC { -1, N_IPSEC6STAT, 1, 0, fast_ipsec_stats, NULL, 0, "ipsec6" }, #endif { -1, N_PIM6STAT, 1, 0, pim6_stats, NULL, 0, "pim6" }, { -1, N_RIP6STAT, 1, 0, rip6_stats, NULL, 0, "rip6" }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #endif struct protox arpprotox[] = { { -1, N_ARPSTAT, 1, 0, arp_stats, NULL, 0, "arp" }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #ifdef IPSEC struct protox pfkeyprotox[] = { { -1, N_PFKEYSTAT, 1, 0, pfkey_stats, NULL, 0, "pfkey" }, { -1, -1, 0, 0, 0, NULL, 0, 0 } }; #endif #ifndef SMALL struct protox atalkprotox[] = { { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, ddp_stats, NULL, 0, "ddp" }, { -1, -1, 0, 0, 0, NULL, 0, NULL } }; #endif struct protox *protoprotox[] = { protox, #ifdef INET6 ip6protox, #endif arpprotox, #ifdef IPSEC pfkeyprotox, #endif #ifndef SMALL atalkprotox, #endif NULL }; const struct softintrq { const char *siq_name; int siq_index; } softintrq[] = { { "arpintrq", N_ARPINTRQ }, { "atintrq1", N_ATINTRQ1 }, { "atintrq2", N_ATINTRQ2 }, { "ppoediscinq", N_PPPOEDISCINQ }, { "ppoeinq", N_PPPOEINQ }, { NULL, -1 }, }; static void printproto(struct protox *, const char *); static void print_softintrq(void); __dead static void usage(void); static struct protox *name2protox(const char *); static struct protox *knownname(const char *); static void prepare(const char *, const char *, struct protox *tp); static kvm_t *prepare_kvmd(const char *, const char *, char *); static kvm_t *kvmd = NULL; gid_t egid; int interval; /* repeat interval for i/f stats */ static const char *nlistf = NULL, *memf = NULL; kvm_t * get_kvmd(void) { char buf[_POSIX2_LINE_MAX]; if (kvmd != NULL) return kvmd; if ((kvmd = prepare_kvmd(nlistf, memf, buf)) == NULL) errx(1, "kvm error: %s", buf); return kvmd; } static kvm_t * prepare_kvmd(const char *nf, const char *mf, char *errbuf) { kvm_t *k; (void)setegid(egid); k = kvm_openfiles(nf, mf, NULL, O_RDONLY, errbuf); (void)setgid(getgid()); return k; } void prepare(const char *nf, const char *mf, struct protox *tp) { char buf[_POSIX2_LINE_MAX]; /* * Try to figure out if we can use sysctl or not. */ if (nf != NULL || mf != NULL) { /* Of course, we can't use sysctl with dumps. */ if (force_sysctl) errx(EXIT_FAILURE, "can't use sysctl with dumps"); /* * If we have -M or -N, we're not dealing with live memory * or want to use kvm interface explicitly. It is sometimes * useful to dig inside of kernel without extending * sysctl interface (i.e., without rebuilding kernel). */ use_sysctl = 0; } else if (qflag || #ifndef SMALL gflag || #endif (pflag && tp->pr_sindex == N_PIMSTAT) || Pflag) { /* These flags are not yet supported via sysctl(3). */ use_sysctl = 0; } else { /* We can use sysctl(3). */ use_sysctl = 1; } if (force_sysctl && !use_sysctl) { /* Let the user know what's about to happen. */ warnx("forcing sysctl usage even though it might not be " "supported"); use_sysctl = 1; } kvmd = prepare_kvmd(nf, mf, buf); if (!use_sysctl) { if (kvmd == NULL) errx(1, "kvm error: %s", buf); if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { if (nf) errx(1, "%s: no namelist", nf); else errx(1, "no namelist"); } } else (void)setgid(getgid()); } int main(int argc, char *argv[]) { struct protoent *p; struct protox *tp; /* for printing cblocks & stats */ int ch; char *cp; char *afname, *afnames; u_long pcbaddr; if (prog_init) { if (prog_init() == -1) err(1, "init failed"); force_sysctl = 1; /* cheap trick */ } egid = getegid(); (void)setegid(getgid()); tp = NULL; af = AF_UNSPEC; afnames = NULL; pcbaddr = 0; while ((ch = getopt(argc, argv, "AabBdf:ghI:LliM:mN:nP:p:qrsStTuVvw:X")) != -1) switch (ch) { case 'A': Aflag = RT_AFLAG; break; case 'a': aflag = 1; break; case 'b': bflag = 1; break; case 'B': Bflag = 1; break; case 'd': dflag = 1; break; case 'f': afnames = optarg; break; #ifndef SMALL case 'g': gflag = 1; break; #endif case 'h': hflag = 1; break; case 'I': iflag = 1; interface = optarg; break; case 'i': iflag = 1; break; case 'L': Lflag = RT_LFLAG; 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 = nflag = RT_NFLAG; break; case 'P': errno = 0; pcbaddr = strtoul(optarg, &cp, 16); if (*cp != '\0' || errno == ERANGE) errx(1, "invalid PCB address %s", optarg); Pflag = 1; break; case 'p': if ((tp = name2protox(optarg)) == NULL) errx(1, "%s: unknown or uninstrumented protocol", optarg); pflag = 1; break; case 'q': qflag = 1; break; case 'r': rflag = 1; break; case 's': ++sflag; break; case 'S': numeric_addr = 1; break; case 't': tflag = 1; break; case 'T': tagflag = RT_TFLAG; break; case 'u': af = AF_LOCAL; break; case 'V': Vflag++; break; case 'v': vflag = RT_VFLAG; break; case 'w': interval = atoi(optarg); iflag = 1; break; case 'X': force_sysctl = 1; break; case '?': default: usage(); } argv += optind; argc -= optind; #define BACKWARD_COMPATIBILITY #ifdef BACKWARD_COMPATIBILITY if (*argv) { if (isdigit((unsigned char)**argv)) { interval = atoi(*argv); if (interval <= 0) usage(); ++argv; iflag = 1; } if (*argv) { nlistf = *argv; if (*++argv) memf = *argv; } } #endif prepare(nlistf, memf, tp); #ifndef SMALL if (Bflag) { if (sflag) bpf_stats(); else bpf_dump(interface); exit(0); } #endif if (mflag) { mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value, nl[N_MCLBYTES].n_value, nl[N_MBPOOL].n_value, nl[N_MCLPOOL].n_value); exit(0); } if (Pflag) { if (tp == NULL) { /* Default to TCP. */ tp = name2protox("tcp"); } if (tp->pr_dump) (*tp->pr_dump)(nl[tp->pr_index].n_value, tp->pr_name, pcbaddr); else printf("%s: no PCB dump routine\n", tp->pr_name); exit(0); } if (pflag) { if (iflag && tp->pr_istats) intpr(interval, nl[N_IFNET_LIST].n_value, tp->pr_istats); else if (tp->pr_stats) (*tp->pr_stats)(nl[tp->pr_sindex].n_value, tp->pr_name); else printf("%s: no stats routine\n", tp->pr_name); exit(0); } if (qflag) { print_softintrq(); exit(0); } /* * Keep file descriptors open to avoid overhead * of open/close on each call to get* routines. */ sethostent(1); setnetent(1); /* * If -f was used afnames != NULL, loop over the address families. * Otherwise do this at least once (with af == AF_UNSPEC). */ afname = NULL; do { if (afnames != NULL) { afname = strsep(&afnames, ","); if (afname == NULL) break; /* Exit early */ if (strcmp(afname, "inet") == 0) af = AF_INET; else if (strcmp(afname, "inet6") == 0) af = AF_INET6; else if (strcmp(afname, "arp") == 0) af = AF_ARP; else if (strcmp(afname, "pfkey") == 0) af = PF_KEY; else if (strcmp(afname, "unix") == 0 || strcmp(afname, "local") == 0) af = AF_LOCAL; else if (strcmp(afname, "atalk") == 0) af = AF_APPLETALK; else if (strcmp(afname, "mpls") == 0) af = AF_MPLS; else { warnx("%s: unknown address family", afname); continue; } } if (iflag) { if (af != AF_UNSPEC) goto protostat; intpr(interval, nl[N_IFNET_LIST].n_value, NULL); break; } if (rflag) { if (sflag) rt_stats(use_sysctl ? 0 : nl[N_RTSTAT].n_value); else { if (use_sysctl) p_rttables(af, nflag|tagflag|vflag|Lflag, 0, ~0); else routepr(nl[N_RTREE].n_value); } break; } #ifndef SMALL if (gflag) { if (sflag) { if (af == AF_INET || af == AF_UNSPEC) mrt_stats(nl[N_MRTPROTO].n_value, nl[N_MRTSTAT].n_value); #ifdef INET6 if (af == AF_INET6 || af == AF_UNSPEC) mrt6_stats(nl[N_MRT6PROTO].n_value, nl[N_MRT6STAT].n_value); #endif } else { if (af == AF_INET || af == AF_UNSPEC) mroutepr(nl[N_MRTPROTO].n_value, nl[N_MFCHASHTBL].n_value, nl[N_MFCHASH].n_value, nl[N_VIFTABLE].n_value); #ifdef INET6 if (af == AF_INET6 || af == AF_UNSPEC) mroute6pr(nl[N_MRT6PROTO].n_value, nl[N_MF6CTABLE].n_value, nl[N_MIF6TABLE].n_value); #endif } break; } #endif protostat: if (af == AF_INET || af == AF_UNSPEC) { setprotoent(1); setservent(1); /* ugh, this is O(MN) ... why do we do this? */ while ((p = getprotoent()) != NULL) { 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); tp->pr_wanted = 0; } endprotoent(); for (tp = protox; tp->pr_name; tp++) if (tp->pr_wanted) 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 if (af == AF_ARP || af == AF_UNSPEC) for (tp = arpprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #ifdef IPSEC if (af == PF_KEY || af == AF_UNSPEC) for (tp = pfkeyprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); #endif #ifndef SMALL if (af == AF_APPLETALK || af == AF_UNSPEC) for (tp = atalkprotox; tp->pr_name; tp++) printproto(tp, tp->pr_name); if ((af == AF_LOCAL || af == AF_UNSPEC) && !sflag) unixpr(nl[N_UNIXSW].n_value); #endif } while (afnames != NULL && afname != NULL); 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, const char *name) { void (*pr)(u_long, const char *); u_long off; if (sflag) { if (iflag) { if (tp->pr_istats) intpr(interval, nl[N_IFNET_LIST].n_value, tp->pr_istats); return; } else { pr = tp->pr_stats; off = nl[tp->pr_sindex].n_value; } } else { pr = tp->pr_cblocks; off = nl[tp->pr_index].n_value; } if (pr != NULL && ((off || af != AF_UNSPEC) || use_sysctl)) (*pr)(off, name); } /* * Print softintrq status. */ void print_softintrq(void) { struct ifqueue intrq, *ifq = &intrq; const struct softintrq *siq; u_long off; for (siq = softintrq; siq->siq_name != NULL; siq++) { off = nl[siq->siq_index].n_value; if (off == 0) continue; kread(off, (char *)ifq, sizeof(*ifq)); printf("%s:\n", siq->siq_name); printf("\tqueue length: %d\n", ifq->ifq_len); printf("\tmaximum queue length: %d\n", ifq->ifq_maxlen); printf("\tpackets dropped: %d\n", ifq->ifq_drops); } } /* * Read kernel memory, return 0 on success. */ int kread(u_long addr, char *buf, int size) { if (kvm_read(kvmd, addr, buf, size) != size) { warnx("%s", kvm_geterr(kvmd)); return -1; } return 0; } const char * plural(int n) { return (n != 1 ? "s" : ""); } const char * plurales(int n) { return (n != 1 ? "es" : ""); } int get_hardticks(void) { int hardticks; kread(nl[N_HARDCLOCK_TICKS].n_value, (char *)&hardticks, sizeof(hardticks)); return hardticks; } /* * Find the protox for the given "well-known" name. */ static struct protox * knownname(const 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(const 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) { const char *progname = getprogname(); (void)fprintf(stderr, "usage: %s [-Aan] [-f address_family[,family ...]] [-M core] [-N system]\n", progname); (void)fprintf(stderr, " %s [-bdgiLmnqrsSv] [-f address_family[,family ...]] [-M core] [-N system]\n", progname); (void)fprintf(stderr, " %s [-dn] [-I interface] [-M core] [-N system] [-w wait]\n", progname); (void)fprintf(stderr, " %s [-p protocol] [-M core] [-N system]\n", progname); (void)fprintf(stderr, " %s [-p protocol] [-M core] [-N system] -P pcbaddr\n", progname); (void)fprintf(stderr, " %s [-p protocol] [-i] [-I Interface] \n", progname); (void)fprintf(stderr, " %s [-s] [-f address_family[,family ...]] [-i] [-I Interface]\n", progname); (void)fprintf(stderr, " %s [-s] [-B] [-I interface]\n", progname); exit(1); }