diff options
Diffstat (limited to 'freebsd-userspace/commands/usr.bin/netstat/main.c')
| -rw-r--r-- | freebsd-userspace/commands/usr.bin/netstat/main.c | 805 |
1 files changed, 805 insertions, 0 deletions
diff --git a/freebsd-userspace/commands/usr.bin/netstat/main.c b/freebsd-userspace/commands/usr.bin/netstat/main.c new file mode 100644 index 00000000..09b26a26 --- /dev/null +++ b/freebsd-userspace/commands/usr.bin/netstat/main.c @@ -0,0 +1,805 @@ +/*- + * 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 */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94"; +#endif /* not lint */ +#endif + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/file.h> +#ifdef __rtems__ +#include <freebsd/sys/protosw.h> +#else +#include <sys/protosw.h> +#endif +#include <sys/socket.h> +#include <sys/socketvar.h> + +#include <netinet/in.h> + +#ifdef NETGRAPH +#include <netgraph/ng_socket.h> +#endif + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <kvm.h> +#include <limits.h> +#include <netdb.h> +#include <nlist.h> +#include <paths.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include "netstat.h" + +static struct nlist nl[] = { +#define N_IFNET 0 + { .n_name = "_ifnet" }, +#define N_RTSTAT 1 + { .n_name = "_rtstat" }, +#define N_RTREE 2 + { .n_name = "_rt_tables"}, +#define N_MRTSTAT 3 + { .n_name = "_mrtstat" }, +#define N_MFCHASHTBL 4 + { .n_name = "_mfchashtbl" }, +#define N_VIFTABLE 5 + { .n_name = "_viftable" }, +#define N_IPX 6 + { .n_name = "_ipxpcb_list"}, +#define N_IPXSTAT 7 + { .n_name = "_ipxstat"}, +#define N_SPXSTAT 8 + { .n_name = "_spx_istat"}, +#define N_DDPSTAT 9 + { .n_name = "_ddpstat"}, +#define N_DDPCB 10 + { .n_name = "_ddpcb"}, +#define N_NGSOCKS 11 + { .n_name = "_ngsocklist"}, +#define N_IP6STAT 12 + { .n_name = "_ip6stat" }, +#define N_ICMP6STAT 13 + { .n_name = "_icmp6stat" }, +#define N_IPSECSTAT 14 + { .n_name = "_ipsec4stat" }, +#define N_IPSEC6STAT 15 + { .n_name = "_ipsec6stat" }, +#define N_PIM6STAT 16 + { .n_name = "_pim6stat" }, +#define N_MRT6STAT 17 + { .n_name = "_mrt6stat" }, +#define N_MF6CTABLE 18 + { .n_name = "_mf6ctable" }, +#define N_MIF6TABLE 19 + { .n_name = "_mif6table" }, +#define N_PFKEYSTAT 20 + { .n_name = "_pfkeystat" }, +#define N_MBSTAT 21 + { .n_name = "_mbstat" }, +#define N_MBTYPES 22 + { .n_name = "_mbtypes" }, +#define N_NMBCLUSTERS 23 + { .n_name = "_nmbclusters" }, +#define N_NMBUFS 24 + { .n_name = "_nmbufs" }, +#define N_MBHI 25 + { .n_name = "_mbuf_hiwm" }, +#define N_CLHI 26 + { .n_name = "_clust_hiwm" }, +#define N_NCPUS 27 + { .n_name = "_smp_cpus" }, +#define N_PAGESZ 28 + { .n_name = "_pagesize" }, +#define N_MBPSTAT 29 + { .n_name = "_mb_statpcpu" }, +#define N_RTTRASH 30 + { .n_name = "_rttrash" }, +#define N_MBLO 31 + { .n_name = "_mbuf_lowm" }, +#define N_CLLO 32 + { .n_name = "_clust_lowm" }, +#define N_CARPSTAT 33 + { .n_name = "_carpstats" }, +#define N_PFSYNCSTAT 34 + { .n_name = "_pfsyncstats" }, +#define N_AHSTAT 35 + { .n_name = "_ahstat" }, +#define N_ESPSTAT 36 + { .n_name = "_espstat" }, +#define N_IPCOMPSTAT 37 + { .n_name = "_ipcompstat" }, +#define N_TCPSTAT 38 + { .n_name = "_tcpstat" }, +#define N_UDPSTAT 39 + { .n_name = "_udpstat" }, +#define N_IPSTAT 40 + { .n_name = "_ipstat" }, +#define N_ICMPSTAT 41 + { .n_name = "_icmpstat" }, +#define N_IGMPSTAT 42 + { .n_name = "_igmpstat" }, +#define N_PIMSTAT 43 + { .n_name = "_pimstat" }, +#define N_TCBINFO 44 + { .n_name = "_tcbinfo" }, +#define N_UDBINFO 45 + { .n_name = "_udbinfo" }, +#define N_DIVCBINFO 46 + { .n_name = "_divcbinfo" }, +#define N_RIPCBINFO 47 + { .n_name = "_ripcbinfo" }, +#define N_UNP_COUNT 48 + { .n_name = "_unp_count" }, +#define N_UNP_GENCNT 49 + { .n_name = "_unp_gencnt" }, +#define N_UNP_DHEAD 50 + { .n_name = "_unp_dhead" }, +#define N_UNP_SHEAD 51 + { .n_name = "_unp_shead" }, +#define N_RIP6STAT 52 + { .n_name = "_rip6stat" }, +#define N_SCTPSTAT 53 + { .n_name = "_sctpstat" }, +#define N_MFCTABLESIZE 54 + { .n_name = "_mfctablesize" }, +#define N_ARPSTAT 55 + { .n_name = "_arpstat" }, + { .n_name = NULL }, +}; + +struct protox { + int pr_index; /* index into nlist of cb head */ + int pr_sindex; /* index into nlist of stat block */ + u_char pr_wanted; /* 1 if wanted, 0 otherwise */ + void (*pr_cblocks)(u_long, const char *, int, int); + /* control blocks printing routine */ + void (*pr_stats)(u_long, const char *, int, int); + /* statistics printing routine */ + void (*pr_istats)(char *); /* per/if statistics printing routine */ + const char *pr_name; /* well-known name */ + int pr_usesysctl; /* non-zero if we use sysctl, not kvm */ + int pr_protocol; +} protox[] = { + { N_TCBINFO, N_TCPSTAT, 1, protopr, + tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, + { N_UDBINFO, N_UDPSTAT, 1, protopr, + udp_stats, NULL, "udp", 1, IPPROTO_UDP }, +#ifdef SCTP + { -1, N_SCTPSTAT, 1, sctp_protopr, + sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP }, +#endif + { N_DIVCBINFO, -1, 1, protopr, + NULL, NULL, "divert", 1, IPPROTO_DIVERT }, + { N_RIPCBINFO, N_IPSTAT, 1, protopr, + ip_stats, NULL, "ip", 1, IPPROTO_RAW }, + { N_RIPCBINFO, N_ICMPSTAT, 1, protopr, + icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP }, + { N_RIPCBINFO, N_IGMPSTAT, 1, protopr, + igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP }, +#ifdef IPSEC + { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */ + ipsec_stats, NULL, "ipsec", 0, 0}, + { -1, N_AHSTAT, 1, NULL, + ah_stats, NULL, "ah", 0, 0}, + { -1, N_ESPSTAT, 1, NULL, + esp_stats, NULL, "esp", 0, 0}, + { -1, N_IPCOMPSTAT, 1, NULL, + ipcomp_stats, NULL, "ipcomp", 0, 0}, +#endif + { N_RIPCBINFO, N_PIMSTAT, 1, protopr, + pim_stats, NULL, "pim", 1, IPPROTO_PIM }, + { -1, N_CARPSTAT, 1, NULL, + carp_stats, NULL, "carp", 1, 0 }, + { -1, N_PFSYNCSTAT, 1, NULL, + pfsync_stats, NULL, "pfsync", 1, 0 }, + { -1, N_ARPSTAT, 1, NULL, + arp_stats, NULL, "arp", 1, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, NULL, 0, 0 } +}; + +#ifdef INET6 +struct protox ip6protox[] = { + { N_TCBINFO, N_TCPSTAT, 1, protopr, + tcp_stats, NULL, "tcp", 1, IPPROTO_TCP }, + { N_UDBINFO, N_UDPSTAT, 1, protopr, + udp_stats, NULL, "udp", 1, IPPROTO_UDP }, + { N_RIPCBINFO, N_IP6STAT, 1, protopr, + ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW }, + { N_RIPCBINFO, N_ICMP6STAT, 1, protopr, + icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 }, +#ifdef IPSEC + { -1, N_IPSEC6STAT, 1, NULL, + ipsec_stats, NULL, "ipsec6", 0, 0 }, +#endif +#ifdef notyet + { -1, N_PIM6STAT, 1, NULL, + pim6_stats, NULL, "pim6", 1, 0 }, +#endif + { -1, N_RIP6STAT, 1, NULL, + rip6_stats, NULL, "rip6", 1, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, NULL, 0, 0 } +}; +#endif /*INET6*/ + +#ifdef IPSEC +struct protox pfkeyprotox[] = { + { -1, N_PFKEYSTAT, 1, NULL, + pfkey_stats, NULL, "pfkey", 0, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, NULL, 0, 0 } +}; +#endif + +struct protox atalkprotox[] = { + { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, + ddp_stats, NULL, "ddp", 0, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, NULL, 0, 0 } +}; +#ifdef NETGRAPH +struct protox netgraphprotox[] = { + { N_NGSOCKS, -1, 1, netgraphprotopr, + NULL, NULL, "ctrl", 0, 0 }, + { N_NGSOCKS, -1, 1, netgraphprotopr, + NULL, NULL, "data", 0, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, NULL, 0, 0 } +}; +#endif +#ifdef IPX +struct protox ipxprotox[] = { + { N_IPX, N_IPXSTAT, 1, ipxprotopr, + ipx_stats, NULL, "ipx", 0, 0 }, + { N_IPX, N_SPXSTAT, 1, ipxprotopr, + spx_stats, NULL, "spx", 0, 0 }, + { -1, -1, 0, NULL, + NULL, NULL, 0, 0, 0 } +}; +#endif + +struct protox *protoprotox[] = { + protox, +#ifdef INET6 + ip6protox, +#endif +#ifdef IPSEC + pfkeyprotox, +#endif +#ifdef IPX + ipxprotox, +#endif + atalkprotox, NULL }; + +static void printproto(struct protox *, const char *); +static void usage(void); +static struct protox *name2protox(const char *); +static struct protox *knownname(const 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 information about bpf consumers */ +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 hflag; /* show counters in human readable format */ +int iflag; /* show interfaces */ +int Lflag; /* show size of listen queues */ +int mflag; /* show memory stats */ +int noutputs = 0; /* how much outputs before we exit */ +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 Wflag; /* wide display */ +int xflag; /* extra information, includes all socket buffer info */ +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 live; /* true if we are examining a live system */ + +int +main(int argc, char *argv[]) +{ + struct protox *tp = NULL; /* for printing cblocks & stats */ + int ch; + + af = AF_UNSPEC; + + while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:q:rSstuWw:xz")) != -1) + switch(ch) { + case 'A': + Aflag = 1; + break; + case 'a': + aflag = 1; + break; + case 'B': + Bflag = 1; + break; + case 'b': + bflag = 1; + break; + case 'd': + dflag = 1; + break; + case 'f': + 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 +#ifdef IPSEC + else if (strcmp(optarg, "pfkey") == 0) + af = PF_KEY; +#endif + else if (strcmp(optarg, "unix") == 0) + af = AF_UNIX; + else if (strcmp(optarg, "atalk") == 0) + af = AF_APPLETALK; +#ifdef NETGRAPH + else if (strcmp(optarg, "ng") == 0 + || strcmp(optarg, "netgraph") == 0) + af = AF_NETGRAPH; +#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 'h': + hflag = 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': + if ((tp = name2protox(optarg)) == NULL) { + errx(1, + "%s: unknown or uninstrumented protocol", + optarg); + } + pflag = 1; + break; + case 'q': + noutputs = atoi(optarg); + if (noutputs != 0) + noutputs++; + break; + case 'r': + rflag = 1; + break; + case 's': + ++sflag; + break; + case 'S': + numeric_addr = 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 'x': + xflag = 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. + */ + live = (nlistf == NULL && memf == NULL); + if (!live) + setgid(getgid()); + + if (Bflag) { + if (!live) + usage(); + bpf_stats(interface); + exit(0); + } + if (mflag) { + if (!live) { + if (kread(0, NULL, 0) == 0) + mbpr(kvmd, nl[N_MBSTAT].n_value); + } else + mbpr(NULL, 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 + kread(0, NULL, 0); + if (iflag && !sflag) { + intpr(interval, nl[N_IFNET].n_value, NULL); + exit(0); + } + if (rflag) { + if (sflag) + rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value); + else + routepr(nl[N_RTREE].n_value); + exit(0); + } + if (gflag) { + 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_MFCHASHTBL].n_value, + nl[N_MFCTABLESIZE].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); + } + + 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*/ +#ifdef IPX + if (af == AF_IPX || af == AF_UNSPEC) { + for (tp = ipxprotox; tp->pr_name; tp++) + printproto(tp, tp->pr_name); + } +#endif /* IPX */ + if (af == AF_APPLETALK || af == AF_UNSPEC) + for (tp = atalkprotox; tp->pr_name; tp++) + printproto(tp, tp->pr_name); +#ifdef NETGRAPH + if (af == AF_NETGRAPH || af == AF_UNSPEC) + for (tp = netgraphprotox; tp->pr_name; tp++) + printproto(tp, tp->pr_name); +#endif /* NETGRAPH */ + if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag) + unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value, + nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value); + 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) + struct protox *tp; + const char *name; +{ + void (*pr)(u_long, const char *, int, 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; + } + if (tp->pr_usesysctl && live) + off = 0; + else if (tp->pr_sindex < 0) { + if (pflag) + printf( + "%s: stats routine doesn't work on cores\n", + tp->pr_name); + return; + } else + off = 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; + } + if (tp->pr_usesysctl && live) + off = 0; + else if (tp->pr_index < 0) { + if (pflag) + printf( + "%s: PCB routine doesn't work on cores\n", + tp->pr_name); + return; + } else + off = nl[tp->pr_index].n_value; + } + if (pr != NULL && (off || (live && tp->pr_usesysctl) || + af != AF_UNSPEC)) + (*pr)(off, name, af, tp->pr_protocol); +} + +/* + * Read kernel memory, return 0 on success. + */ +int +kread(u_long addr, void *buf, size_t size) +{ + char errbuf[_POSIX2_LINE_MAX]; + + if (kvmd == NULL) { + kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); + setgid(getgid()); + 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: %s", errbuf); + return(-1); + } + } + if (!buf) + return (0); + if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) { + warnx("%s", kvm_geterr(kvmd)); + return (-1); + } + return (0); +} + +const char * +plural(uintmax_t n) +{ + return (n != 1 ? "s" : ""); +} + +const char * +plurales(uintmax_t n) +{ + return (n != 1 ? "es" : ""); +} + +const char * +pluralies(uintmax_t n) +{ + return (n != 1 ? "ies" : "y"); +} + +/* + * 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) +{ + (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", +"usage: netstat [-AaLnSWx] [-f protocol_family | -p protocol]\n" +" [-M core] [-N system]", +" netstat -i | -I interface [-abdhntW] [-f address_family]\n" +" [-M core] [-N system]", +" netstat -w wait [-I interface] [-d] [-M core] [-N system] [-q howmany]", +" netstat -s [-s] [-z] [-f protocol_family | -p protocol]\n" +" [-M core] [-N system]", +" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n" +" [-M core] [-N system]", +" netstat -m [-M core] [-N system]", +" netstat -B [-I interface]", +" 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); +} |