606 lines
13 KiB
C
606 lines
13 KiB
C
/*
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* Copyright (c) 1983, 1988, 1993
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* Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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char const copyright[] =
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"@(#) Copyright (c) 1983, 1988, 1993\n\
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Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94";
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#endif
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static const char rcsid[] =
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"$Id: main.c,v 1.21 1998/08/05 13:54:07 phk Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <kvm.h>
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#include <limits.h>
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#include <netdb.h>
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#include <nlist.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "netstat.h"
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static struct nlist nl[] = {
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#define N_IFNET 0
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{ "_ifnet" },
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#define N_IMP 1
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{ "_imp_softc" },
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#define N_RTSTAT 2
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{ "_rtstat" },
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#define N_UNIXSW 3
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{ "_localsw" },
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#define N_IDP 4
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{ "_nspcb"},
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#define N_IDPSTAT 5
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{ "_idpstat"},
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#define N_SPPSTAT 6
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{ "_spp_istat"},
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#define N_NSERR 7
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{ "_ns_errstat"},
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#define N_CLNPSTAT 8
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{ "_clnp_stat"},
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#define IN_NOTUSED 9
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{ "_tp_inpcb" },
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#define ISO_TP 10
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{ "_tp_refinfo" },
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#define N_TPSTAT 11
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{ "_tp_stat" },
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#define N_ESISSTAT 12
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{ "_esis_stat"},
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#define N_NIMP 13
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{ "_nimp"},
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#define N_RTREE 14
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{ "_rt_tables"},
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#define N_CLTP 15
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{ "_cltb"},
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#define N_CLTPSTAT 16
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{ "_cltpstat"},
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#define N_NFILE 17
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{ "_nfile" },
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#define N_FILE 18
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{ "_file" },
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#define N_MRTPROTO 19
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{ "_ip_mrtproto" },
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#define N_MRTSTAT 20
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{ "_mrtstat" },
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#define N_MFCTABLE 21
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{ "_mfctable" },
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#define N_VIFTABLE 22
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{ "_viftable" },
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#define N_IPX 23
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{ "_ipxpcb"},
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#define N_IPXSTAT 24
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{ "_ipxstat"},
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#define N_SPXSTAT 25
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{ "_spx_istat"},
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#define N_DDPSTAT 26
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{ "_ddpstat"},
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#define N_DDPCB 27
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{ "_ddpcb"},
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{ "" },
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};
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struct protox {
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u_char pr_index; /* index into nlist of cb head */
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u_char pr_sindex; /* index into nlist of stat block */
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u_char pr_wanted; /* 1 if wanted, 0 otherwise */
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void (*pr_cblocks)(); /* control blocks printing routine */
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void (*pr_stats)(); /* statistics printing routine */
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char *pr_name; /* well-known name */
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int pr_usesysctl; /* true if we use sysctl, not kvm */
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} protox[] = {
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{ -1, -1, 1, protopr,
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tcp_stats, "tcp", IPPROTO_TCP },
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{ -1, -1, 1, protopr,
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udp_stats, "udp", IPPROTO_UDP },
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{ -1, -1, 1, protopr,
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NULL, "divert", IPPROTO_DIVERT },
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{ -1, -1, 1, protopr,
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ip_stats, "ip", IPPROTO_RAW },
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{ -1, -1, 1, protopr,
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icmp_stats, "icmp", IPPROTO_ICMP },
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{ -1, -1, 1, protopr,
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igmp_stats, "igmp", IPPROTO_IGMP },
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{ -1, -1, 0, 0,
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0, 0 }
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};
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struct protox atalkprotox[] = {
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{ N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
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ddp_stats, "ddp" },
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{ -1, -1, 0, 0,
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0, 0 }
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};
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struct protox ipxprotox[] = {
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{ N_IPX, N_IPXSTAT, 1, ipxprotopr,
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ipx_stats, "ipx" },
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{ N_IPX, N_SPXSTAT, 1, ipxprotopr,
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spx_stats, "spx" },
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{ -1, -1, 0, 0,
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0, 0 }
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};
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#ifdef NS
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struct protox nsprotox[] = {
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{ N_IDP, N_IDPSTAT, 1, nsprotopr,
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idp_stats, "idp" },
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{ N_IDP, N_SPPSTAT, 1, nsprotopr,
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spp_stats, "spp" },
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{ -1, N_NSERR, 1, 0,
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nserr_stats, "ns_err" },
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{ -1, -1, 0, 0,
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0, 0 }
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};
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#endif
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#ifdef ISO
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struct protox isoprotox[] = {
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{ ISO_TP, N_TPSTAT, 1, iso_protopr,
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tp_stats, "tp" },
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{ N_CLTP, N_CLTPSTAT, 1, iso_protopr,
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cltp_stats, "cltp" },
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{ -1, N_CLNPSTAT, 1, 0,
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clnp_stats, "clnp"},
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{ -1, N_ESISSTAT, 1, 0,
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esis_stats, "esis"},
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{ -1, -1, 0, 0,
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0, 0 }
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};
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#endif
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struct protox *protoprotox[] = { protox, ipxprotox, atalkprotox,
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#ifdef NS
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nsprotox,
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#endif
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#ifdef ISO
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isoprotox,
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#endif
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NULL };
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static void printproto __P((struct protox *, char *));
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static void usage __P((void));
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static struct protox *name2protox __P((char *));
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static struct protox *knownname __P((char *));
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static kvm_t *kvmd;
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char *nlistf = NULL, *memf = NULL;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register struct protoent *p;
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register struct protox *tp; /* for printing cblocks & stats */
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int ch;
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af = AF_UNSPEC;
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while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:np:rstuw:")) != -1)
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switch(ch) {
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case 'A':
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Aflag = 1;
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break;
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case 'a':
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aflag = 1;
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break;
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case 'b':
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bflag = 1;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'f':
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#ifdef NS
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if (strcmp(optarg, "ns") == 0)
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af = AF_NS;
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else
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#endif
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if (strcmp(optarg, "ipx") == 0)
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af = AF_IPX;
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else if (strcmp(optarg, "inet") == 0)
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af = AF_INET;
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else if (strcmp(optarg, "unix") == 0)
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af = AF_UNIX;
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else if (strcmp(optarg, "atalk") == 0)
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af = AF_APPLETALK;
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#ifdef ISO
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else if (strcmp(optarg, "iso") == 0)
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af = AF_ISO;
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#endif
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else {
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errx(1, "%s: unknown address family", optarg);
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}
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break;
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case 'g':
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gflag = 1;
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break;
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case 'I': {
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char *cp;
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iflag = 1;
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for (cp = interface = optarg; isalpha(*cp); cp++)
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continue;
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unit = atoi(cp);
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break;
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}
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case 'i':
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iflag = 1;
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break;
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case 'M':
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memf = optarg;
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break;
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case 'm':
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mflag = 1;
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break;
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case 'N':
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nlistf = optarg;
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break;
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case 'n':
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nflag = 1;
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break;
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case 'p':
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if ((tp = name2protox(optarg)) == NULL) {
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errx(1,
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"%s: unknown or uninstrumented protocol",
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optarg);
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}
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pflag = 1;
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break;
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case 'r':
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rflag = 1;
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break;
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case 's':
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++sflag;
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break;
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case 't':
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tflag = 1;
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break;
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case 'u':
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af = AF_UNIX;
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break;
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case 'w':
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interval = atoi(optarg);
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iflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argv += optind;
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argc -= optind;
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#define BACKWARD_COMPATIBILITY
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#ifdef BACKWARD_COMPATIBILITY
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if (*argv) {
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if (isdigit(**argv)) {
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interval = atoi(*argv);
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if (interval <= 0)
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usage();
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++argv;
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iflag = 1;
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}
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if (*argv) {
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nlistf = *argv;
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if (*++argv)
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memf = *argv;
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}
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}
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#endif
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/*
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* Discard setgid privileges if not the running kernel so that bad
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* guys can't print interesting stuff from kernel memory.
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*/
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if (nlistf != NULL || memf != NULL)
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setgid(getgid());
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if (mflag) {
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mbpr();
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exit(0);
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}
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if (pflag) {
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if (!tp->pr_stats) {
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printf("%s: no stats routine\n", tp->pr_name);
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exit(0);
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}
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if (tp->pr_usesysctl) {
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(*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name);
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} else {
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kread(0, 0, 0);
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(*tp->pr_stats)(nl[tp->pr_sindex].n_value,
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tp->pr_name);
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}
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exit(0);
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}
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#if 0
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/*
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* Keep file descriptors open to avoid overhead
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* of open/close on each call to get* routines.
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*/
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sethostent(1);
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setnetent(1);
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#else
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/*
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* This does not make sense any more with DNS being default over
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* the files. Doing a setXXXXent(1) causes a tcp connection to be
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* used for the queries, which is slower.
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*/
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#endif
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if (iflag) {
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kread(0, 0, 0);
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intpr(interval, nl[N_IFNET].n_value);
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exit(0);
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}
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if (rflag) {
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kread(0, 0, 0);
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if (sflag)
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rt_stats(nl[N_RTSTAT].n_value);
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else
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routepr(nl[N_RTREE].n_value);
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exit(0);
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}
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if (gflag) {
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kread(0, 0, 0);
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if (sflag)
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mrt_stats(nl[N_MRTPROTO].n_value,
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nl[N_MRTSTAT].n_value);
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else
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mroutepr(nl[N_MRTPROTO].n_value,
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nl[N_MFCTABLE].n_value,
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nl[N_VIFTABLE].n_value);
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exit(0);
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}
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if (af == AF_INET || af == AF_UNSPEC) {
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setprotoent(1);
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setservent(1);
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/* ugh, this is O(MN) ... why do we do this? */
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while ((p = getprotoent())) {
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for (tp = protox; tp->pr_name; tp++)
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if (strcmp(tp->pr_name, p->p_name) == 0)
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break;
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if (tp->pr_name == 0 || tp->pr_wanted == 0)
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continue;
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printproto(tp, p->p_name);
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}
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endprotoent();
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}
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if (af == AF_IPX || af == AF_UNSPEC)
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for (tp = ipxprotox; tp->pr_name; tp++)
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printproto(tp, tp->pr_name);
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if (af == AF_APPLETALK || af == AF_UNSPEC)
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for (tp = atalkprotox; tp->pr_name; tp++)
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printproto(tp, tp->pr_name);
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#ifdef NS
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if (af == AF_NS || af == AF_UNSPEC)
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for (tp = nsprotox; tp->pr_name; tp++)
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printproto(tp, tp->pr_name);
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#endif
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#ifdef ISO
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if (af == AF_ISO || af == AF_UNSPEC)
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for (tp = isoprotox; tp->pr_name; tp++)
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printproto(tp, tp->pr_name);
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#endif
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if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
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unixpr();
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exit(0);
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}
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/*
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* Print out protocol statistics or control blocks (per sflag).
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* If the interface was not specifically requested, and the symbol
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* is not in the namelist, ignore this one.
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*/
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static void
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printproto(tp, name)
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register struct protox *tp;
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char *name;
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{
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void (*pr)();
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u_long off;
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if (sflag) {
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pr = tp->pr_stats;
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off = tp->pr_usesysctl ? tp->pr_usesysctl
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: nl[tp->pr_sindex].n_value;
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} else {
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pr = tp->pr_cblocks;
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off = tp->pr_usesysctl ? tp->pr_usesysctl
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: nl[tp->pr_index].n_value;
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}
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if (pr != NULL && (off || af != AF_UNSPEC))
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(*pr)(off, name);
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}
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/*
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* Read kernel memory, return 0 on success.
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*/
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int
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kread(addr, buf, size)
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u_long addr;
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char *buf;
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int size;
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{
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if (kvmd == 0) {
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/*
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* XXX.
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*/
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kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
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if (kvmd != NULL) {
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if (kvm_nlist(kvmd, nl) < 0) {
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if(nlistf)
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errx(1, "%s: kvm_nlist: %s", nlistf,
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kvm_geterr(kvmd));
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else
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errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
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}
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if (nl[0].n_type == 0) {
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if(nlistf)
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errx(1, "%s: no namelist", nlistf);
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else
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errx(1, "no namelist");
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}
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} else {
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warnx("kvm not available");
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return(-1);
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}
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}
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if (!buf)
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return (0);
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if (kvm_read(kvmd, addr, buf, size) != size) {
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warnx("%s", kvm_geterr(kvmd));
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return (-1);
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}
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return (0);
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}
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char *
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plural(n)
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int n;
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{
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return (n != 1 ? "s" : "");
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}
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char *
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plurales(n)
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int n;
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{
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return (n != 1 ? "es" : "");
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}
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/*
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* Find the protox for the given "well-known" name.
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*/
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static struct protox *
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knownname(name)
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char *name;
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{
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struct protox **tpp, *tp;
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for (tpp = protoprotox; *tpp; tpp++)
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for (tp = *tpp; tp->pr_name; tp++)
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if (strcmp(tp->pr_name, name) == 0)
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return (tp);
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return (NULL);
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}
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/*
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* Find the protox corresponding to name.
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*/
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static struct protox *
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name2protox(name)
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char *name;
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{
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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++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|