684 lines
16 KiB
C
684 lines
16 KiB
C
/* $NetBSD: netstat.c,v 1.27 2005/02/26 22:12:33 dsl Exp $ */
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/*-
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* Copyright (c) 1980, 1992, 1993
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* The 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. 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: netstat.c,v 1.27 2005/02/26 22:12:33 dsl Exp $");
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#endif /* not lint */
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/*
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* netstat
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*/
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#include <sys/param.h>
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#include <sys/socketvar.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <net/route.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/icmp_var.h>
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#include <netinet/ip_var.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/in6_pcb.h>
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#endif
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#include <netinet/tcp.h>
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#include <netinet/tcpip.h>
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#include <netinet/tcp_seq.h>
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#define TCPSTATES
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcp_debug.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include "systat.h"
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#include "extern.h"
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static void fetchnetstat4(void *, int);
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static void enter(struct inpcb *, struct socket *, int, const char *);
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static const char *inetname(struct in_addr);
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static void inetprint(struct in_addr *, int, const char *);
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#ifdef INET6
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static void fetchnetstat6(void *, int);
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static void enter6(struct in6pcb *, struct socket *, int, const char *);
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static const char *inet6name(struct in6_addr *);
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static void inet6print(struct in6_addr *, int, const char *);
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#endif
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#define streq(a,b) (strcmp(a,b)==0)
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struct netinfo {
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struct netinfo *ni_forw, *ni_prev;
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int ni_family;
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short ni_line; /* line on screen */
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short ni_seen; /* 0 when not present in list */
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short ni_flags;
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#define NIF_LACHG 0x1 /* local address changed */
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#define NIF_FACHG 0x2 /* foreign address changed */
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short ni_state; /* tcp state */
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const char *ni_proto; /* protocol */
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struct in_addr ni_laddr; /* local address */
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#ifdef INET6
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struct in6_addr ni_laddr6; /* local address */
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#endif
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long ni_lport; /* local port */
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struct in_addr ni_faddr; /* foreign address */
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#ifdef INET6
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struct in6_addr ni_faddr6; /* foreign address */
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#endif
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long ni_fport; /* foreign port */
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long ni_rcvcc; /* rcv buffer character count */
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long ni_sndcc; /* snd buffer character count */
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};
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static struct {
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struct netinfo *ni_forw, *ni_prev;
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} netcb;
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struct netinfo *nhead;
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static int aflag = 0;
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int nflag = 0;
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static int lastrow = 1;
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WINDOW *
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opennetstat(void)
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{
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sethostent(1);
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setnetent(1);
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return (subwin(stdscr, -1, 0, 5, 0));
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}
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void
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closenetstat(WINDOW *w)
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{
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struct netinfo *p;
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endhostent();
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endnetent();
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p = netcb.ni_forw;
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while (p != nhead) {
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if (p->ni_line != -1)
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lastrow--;
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p->ni_line = -1;
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p = p->ni_forw;
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}
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if (w != NULL) {
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wclear(w);
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wrefresh(w);
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delwin(w);
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}
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}
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static struct nlist namelist[] = {
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#define X_TCBTABLE 0
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{ "_tcbtable" },
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#define X_UDBTABLE 1
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{ "_udbtable" },
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{ "" },
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};
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int
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initnetstat(void)
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{
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int n;
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n = kvm_nlist(kd, namelist);
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if (n < 0) {
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nlisterr(namelist);
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return(0);
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} else if (n == sizeof(namelist) / sizeof(namelist[0]) - 1) {
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error("No symbols in namelist");
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return(0);
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}
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nhead = (struct netinfo *)(void *)&netcb;
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netcb.ni_forw = netcb.ni_prev = nhead;
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protos = TCP|UDP;
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return(1);
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}
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void
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fetchnetstat(void)
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{
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struct netinfo *p;
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if (namelist[X_TCBTABLE].n_value == 0)
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return;
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw)
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p->ni_seen = 0;
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if ((protos & (TCP | UDP)) == 0) {
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error("No protocols to display");
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return;
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}
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if ((protos & TCP) && namelist[X_TCBTABLE].n_type)
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fetchnetstat4(NPTR(X_TCBTABLE), 1);
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if ((protos & UDP) && namelist[X_UDBTABLE].n_type)
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fetchnetstat4(NPTR(X_UDBTABLE), 0);
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#ifdef INET6
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if ((protos & TCP) && namelist[X_TCBTABLE].n_type)
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fetchnetstat6(NPTR(X_TCBTABLE), 1);
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if ((protos & UDP) && namelist[X_UDBTABLE].n_type)
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fetchnetstat6(NPTR(X_UDBTABLE), 0);
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#endif
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}
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static void
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fetchnetstat4(void *off, int istcp)
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{
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struct inpcbtable pcbtable;
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struct inpcb *head, *prev, *next;
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struct netinfo *p;
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struct inpcb inpcb;
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struct socket sockb;
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struct tcpcb tcpcb;
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KREAD(off, &pcbtable, sizeof pcbtable);
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prev = head = (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue;
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next = (struct inpcb *)pcbtable.inpt_queue.cqh_first;
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while (next != head) {
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KREAD(next, &inpcb, sizeof (inpcb));
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if ((struct inpcb *)inpcb.inp_queue.cqe_prev != prev) {
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw)
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p->ni_seen = 1;
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error("Kernel state in transition");
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return;
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}
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prev = next;
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next = (struct inpcb *)inpcb.inp_queue.cqe_next;
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if (inpcb.inp_af != AF_INET)
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continue;
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if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
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continue;
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if (nhosts && !checkhost(&inpcb))
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continue;
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if (nports && !checkport(&inpcb))
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continue;
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KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
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if (istcp) {
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KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
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enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
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} else
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enter(&inpcb, &sockb, 0, "udp");
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}
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}
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#ifdef INET6
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static void
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fetchnetstat6(void *off, int istcp)
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{
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struct inpcbtable pcbtable;
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struct in6pcb *head6, *prev6, *next6;
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struct netinfo *p;
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struct socket sockb;
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struct tcpcb tcpcb;
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struct in6pcb in6pcb;
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KREAD(off, &pcbtable, sizeof pcbtable);
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prev6 = head6 = (struct in6pcb *)&((struct inpcbtable *)off)->inpt_queue;
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next6 = (struct in6pcb *)pcbtable.inpt_queue.cqh_first;
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while (next6 != head6) {
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KREAD(next6, &in6pcb, sizeof (in6pcb));
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if ((struct in6pcb *)in6pcb.in6p_queue.cqe_prev != prev6) {
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw)
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p->ni_seen = 1;
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error("Kernel state in transition");
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return;
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}
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prev6 = next6;
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next6 = (struct in6pcb *)in6pcb.in6p_queue.cqe_next;
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if (in6pcb.in6p_af != AF_INET6)
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continue;
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if (!aflag && IN6_IS_ADDR_UNSPECIFIED(&in6pcb.in6p_laddr))
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continue;
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if (nhosts && !checkhost6(&in6pcb))
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continue;
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if (nports && !checkport6(&in6pcb))
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continue;
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KREAD(in6pcb.in6p_socket, &sockb, sizeof (sockb));
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if (istcp) {
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KREAD(in6pcb.in6p_ppcb, &tcpcb, sizeof (tcpcb));
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enter6(&in6pcb, &sockb, tcpcb.t_state, "tcp");
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} else
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enter6(&in6pcb, &sockb, 0, "udp");
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}
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}
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#endif /*INET6*/
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static void
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enter(struct inpcb *inp, struct socket *so, int state, const char *proto)
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{
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struct netinfo *p;
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/*
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* Only take exact matches, any sockets with
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* previously unbound addresses will be deleted
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* below in the display routine because they
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* will appear as ``not seen'' in the kernel
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* data structures.
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*/
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw) {
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if (p->ni_family != AF_INET)
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continue;
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if (!streq(proto, p->ni_proto))
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continue;
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if (p->ni_lport != inp->inp_lport ||
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p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
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continue;
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if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
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p->ni_fport == inp->inp_fport)
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break;
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}
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if (p == nhead) {
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if ((p = malloc(sizeof(*p))) == NULL) {
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error("Out of memory");
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return;
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}
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p->ni_prev = nhead;
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p->ni_forw = netcb.ni_forw;
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netcb.ni_forw->ni_prev = p;
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netcb.ni_forw = p;
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p->ni_line = -1;
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p->ni_laddr = inp->inp_laddr;
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p->ni_lport = inp->inp_lport;
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p->ni_faddr = inp->inp_faddr;
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p->ni_fport = inp->inp_fport;
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p->ni_proto = proto;
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p->ni_flags = NIF_LACHG | NIF_FACHG;
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p->ni_family = AF_INET;
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}
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p->ni_rcvcc = so->so_rcv.sb_cc;
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p->ni_sndcc = so->so_snd.sb_cc;
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p->ni_state = state;
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p->ni_seen = 1;
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}
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#ifdef INET6
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static void
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enter6(struct in6pcb *in6p, struct socket *so, int state, const char *proto)
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{
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struct netinfo *p;
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/*
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* Only take exact matches, any sockets with
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* previously unbound addresses will be deleted
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* below in the display routine because they
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* will appear as ``not seen'' in the kernel
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* data structures.
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*/
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw) {
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if (p->ni_family != AF_INET6)
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continue;
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if (!streq(proto, p->ni_proto))
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continue;
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if (p->ni_lport != in6p->in6p_lport ||
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!IN6_ARE_ADDR_EQUAL(&p->ni_laddr6, &in6p->in6p_laddr))
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continue;
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if (IN6_ARE_ADDR_EQUAL(&p->ni_faddr6, &in6p->in6p_faddr) &&
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p->ni_fport == in6p->in6p_fport)
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break;
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}
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if (p == nhead) {
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if ((p = malloc(sizeof(*p))) == NULL) {
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error("Out of memory");
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return;
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}
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p->ni_prev = nhead;
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p->ni_forw = netcb.ni_forw;
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netcb.ni_forw->ni_prev = p;
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netcb.ni_forw = p;
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p->ni_line = -1;
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p->ni_laddr6 = in6p->in6p_laddr;
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p->ni_lport = in6p->in6p_lport;
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p->ni_faddr6 = in6p->in6p_faddr;
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p->ni_fport = in6p->in6p_fport;
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p->ni_proto = proto;
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p->ni_flags = NIF_LACHG | NIF_FACHG;
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p->ni_family = AF_INET6;
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}
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p->ni_rcvcc = so->so_rcv.sb_cc;
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p->ni_sndcc = so->so_snd.sb_cc;
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p->ni_state = state;
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p->ni_seen = 1;
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}
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#endif
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/* column locations */
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#define LADDR 0
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#define FADDR LADDR+23
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#define PROTO FADDR+23
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#define RCVCC PROTO+6
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#define SNDCC RCVCC+7
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#define STATE SNDCC+7
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void
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labelnetstat(void)
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{
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struct netinfo *p;
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if (namelist[X_TCBTABLE].n_type == 0)
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return;
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wmove(wnd, 0, 0); wclrtobot(wnd);
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mvwaddstr(wnd, 0, LADDR, "Local Address");
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mvwaddstr(wnd, 0, FADDR, "Foreign Address");
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mvwaddstr(wnd, 0, PROTO, "Proto");
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mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
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mvwaddstr(wnd, 0, SNDCC, "Send-Q");
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mvwaddstr(wnd, 0, STATE, "(state)");
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw) {
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if (p->ni_line == -1)
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continue;
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p->ni_flags |= NIF_LACHG | NIF_FACHG;
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}
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}
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void
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shownetstat(void)
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{
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struct netinfo *p, *q;
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/*
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* First, delete any connections that have gone
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* away and adjust the position of connections
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* below to reflect the deleted line.
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*/
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p = netcb.ni_forw;
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while (p != nhead) {
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if (p->ni_line == -1 || p->ni_seen) {
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p = p->ni_forw;
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continue;
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}
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wmove(wnd, p->ni_line, 0);
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wdeleteln(wnd);
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for (q = netcb.ni_forw; q != nhead; q = q->ni_forw)
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if (q != p && q->ni_line > p->ni_line) {
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q->ni_line--;
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/* this shouldn't be necessary */
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q->ni_flags |= NIF_LACHG | NIF_FACHG;
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}
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lastrow--;
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q = p->ni_forw;
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p->ni_prev->ni_forw = p->ni_forw;
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p->ni_forw->ni_prev = p->ni_prev;
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free(p);
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p = q;
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}
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/*
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* Update existing connections and add new ones.
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*/
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for (p = netcb.ni_forw; p != nhead; p = p->ni_forw) {
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if (p->ni_line == -1) {
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/*
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* Add a new entry if possible.
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*/
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if (lastrow > getmaxy(wnd))
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continue;
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p->ni_line = lastrow++;
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p->ni_flags |= NIF_LACHG | NIF_FACHG;
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}
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if (p->ni_flags & NIF_LACHG) {
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wmove(wnd, p->ni_line, LADDR);
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switch (p->ni_family) {
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case AF_INET:
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inetprint(&p->ni_laddr, p->ni_lport,
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p->ni_proto);
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break;
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#ifdef INET6
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case AF_INET6:
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inet6print(&p->ni_laddr6, p->ni_lport,
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p->ni_proto);
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break;
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#endif
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}
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p->ni_flags &= ~NIF_LACHG;
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}
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|
if (p->ni_flags & NIF_FACHG) {
|
|
wmove(wnd, p->ni_line, FADDR);
|
|
switch (p->ni_family) {
|
|
case AF_INET:
|
|
inetprint(&p->ni_faddr, p->ni_fport,
|
|
p->ni_proto);
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
inet6print(&p->ni_faddr6, p->ni_fport,
|
|
p->ni_proto);
|
|
break;
|
|
#endif
|
|
}
|
|
p->ni_flags &= ~NIF_FACHG;
|
|
}
|
|
mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
|
|
#ifdef INET6
|
|
if (p->ni_family == AF_INET6)
|
|
waddstr(wnd, "6");
|
|
#endif
|
|
mvwprintw(wnd, p->ni_line, RCVCC, "%6ld", p->ni_rcvcc);
|
|
mvwprintw(wnd, p->ni_line, SNDCC, "%6ld", p->ni_sndcc);
|
|
if (streq(p->ni_proto, "tcp")) {
|
|
if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
|
|
mvwprintw(wnd, p->ni_line, STATE, "%d",
|
|
p->ni_state);
|
|
else
|
|
mvwaddstr(wnd, p->ni_line, STATE,
|
|
tcpstates[p->ni_state]);
|
|
}
|
|
wclrtoeol(wnd);
|
|
}
|
|
if (lastrow < getmaxy(wnd)) {
|
|
wmove(wnd, lastrow, 0); wclrtobot(wnd);
|
|
wmove(wnd, getmaxy(wnd), 0); wdeleteln(wnd); /* XXX */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Pretty print an Internet address (net address + port).
|
|
* If the nflag was specified, use numbers instead of names.
|
|
*/
|
|
static void
|
|
inetprint(struct in_addr *in, int port, const char *proto)
|
|
{
|
|
struct servent *sp = 0;
|
|
char line[80], *cp;
|
|
|
|
(void)snprintf(line, sizeof line, "%.*s.", 16, inetname(*in));
|
|
cp = strchr(line, '\0');
|
|
if (!nflag && port)
|
|
sp = getservbyport(port, proto);
|
|
if (sp || port == 0)
|
|
(void)snprintf(cp, line + sizeof line - cp, "%.8s",
|
|
sp ? sp->s_name : "*");
|
|
else
|
|
(void)snprintf(cp, line + sizeof line - cp, "%d",
|
|
ntohs((u_short)port));
|
|
/* pad to full column to clear any garbage */
|
|
cp = strchr(line, '\0');
|
|
while (cp - line < 22)
|
|
*cp++ = ' ';
|
|
*cp = '\0';
|
|
waddstr(wnd, line);
|
|
}
|
|
|
|
#ifdef INET6
|
|
static void
|
|
inet6print(struct in6_addr *in6, int port, const char *proto)
|
|
{
|
|
struct servent *sp = 0;
|
|
char line[80], *cp;
|
|
|
|
(void)snprintf(line, sizeof line, "%.*s.", 16, inet6name(in6));
|
|
cp = strchr(line, '\0');
|
|
if (!nflag && port)
|
|
sp = getservbyport(port, proto);
|
|
if (sp || port == 0)
|
|
(void)snprintf(cp, line + sizeof line - cp, "%.8s",
|
|
sp ? sp->s_name : "*");
|
|
else
|
|
(void)snprintf(cp, line + sizeof line - cp, "%d",
|
|
ntohs((u_short)port));
|
|
/* pad to full column to clear any garbage */
|
|
cp = strchr(line, '\0');
|
|
while (cp - line < 22)
|
|
*cp++ = ' ';
|
|
*cp = '\0';
|
|
waddstr(wnd, line);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Construct an Internet address representation.
|
|
* If the nflag has been supplied, give
|
|
* numeric value, otherwise try for symbolic name.
|
|
*/
|
|
static const char *
|
|
inetname(struct in_addr in)
|
|
{
|
|
char *cp = 0;
|
|
static char line[50];
|
|
struct hostent *hp;
|
|
struct netent *np;
|
|
|
|
if (!nflag && in.s_addr != INADDR_ANY) {
|
|
int net = inet_netof(in);
|
|
int lna = inet_lnaof(in);
|
|
|
|
if (lna == INADDR_ANY) {
|
|
np = getnetbyaddr(net, AF_INET);
|
|
if (np)
|
|
cp = np->n_name;
|
|
}
|
|
if (cp == 0) {
|
|
hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
|
|
if (hp)
|
|
cp = hp->h_name;
|
|
}
|
|
}
|
|
if (in.s_addr == INADDR_ANY)
|
|
strlcpy(line, "*", sizeof(line));
|
|
else if (cp)
|
|
strlcpy(line, cp, sizeof(line));
|
|
else {
|
|
in.s_addr = ntohl(in.s_addr);
|
|
#define C(x) ((x) & 0xff)
|
|
(void)snprintf(line, sizeof line, "%u.%u.%u.%u",
|
|
C(in.s_addr >> 24), C(in.s_addr >> 16),
|
|
C(in.s_addr >> 8), C(in.s_addr));
|
|
#undef C
|
|
}
|
|
return (line);
|
|
}
|
|
|
|
#ifdef INET6
|
|
static const char *
|
|
inet6name(struct in6_addr *in6)
|
|
{
|
|
static char line[NI_MAXHOST];
|
|
struct sockaddr_in6 sin6;
|
|
int flags;
|
|
|
|
if (nflag)
|
|
flags = NI_NUMERICHOST;
|
|
else
|
|
flags = 0;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(in6))
|
|
return "*";
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_addr = *in6;
|
|
if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
|
|
line, sizeof(line), NULL, 0, flags) == 0)
|
|
return line;
|
|
return "?";
|
|
}
|
|
#endif
|
|
|
|
/* please note: there are also some netstat commands in netcmds.c */
|
|
|
|
void
|
|
netstat_all(char *args)
|
|
{
|
|
aflag = !aflag;
|
|
fetchnetstat();
|
|
shownetstat();
|
|
refresh();
|
|
}
|
|
|
|
void
|
|
netstat_names(char *args)
|
|
{
|
|
|
|
if (nflag == 0)
|
|
return;
|
|
|
|
nflag = 0;
|
|
wclear(wnd);
|
|
labelnetstat();
|
|
shownetstat();
|
|
refresh();
|
|
}
|
|
|
|
void
|
|
netstat_numbers(char *args)
|
|
{
|
|
|
|
if (nflag != 0)
|
|
return;
|
|
|
|
nflag = 1;
|
|
wclear(wnd);
|
|
labelnetstat();
|
|
shownetstat();
|
|
refresh();
|
|
}
|