678 lines
16 KiB
C
678 lines
16 KiB
C
/*-
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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. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
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#endif
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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/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.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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#ifdef INET6
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#include <netinet/ip6.h>
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#endif
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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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#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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#include <netinet/tcp_var.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 <nlist.h>
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#include <paths.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 struct netinfo *enter(struct inpcb *, int, const char *);
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static void enter_kvm(struct inpcb *, struct socket *, int, const char *);
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static void enter_sysctl(struct inpcb *, struct xsocket *, int, const char *);
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static void fetchnetstat_kvm(void);
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static void fetchnetstat_sysctl(void);
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static char *inetname(struct sockaddr *);
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static void inetprint(struct sockaddr *, const char *);
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#define streq(a,b) (strcmp(a,b)==0)
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#define YMAX(w) ((w)->_maxy-1)
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WINDOW *
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opennetstat()
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{
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sethostent(1);
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setnetent(1);
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return (subwin(stdscr, LINES-5-1, 0, 5, 0));
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}
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struct netinfo {
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TAILQ_ENTRY(netinfo) chain;
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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 sockaddr_storage ni_lsa; /* local address */
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struct sockaddr_storage ni_fsa; /* foreign address */
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u_int ni_rcvcc; /* rcv buffer character count */
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u_int ni_sndcc; /* snd buffer character count */
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};
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TAILQ_HEAD(netinfohead, netinfo) netcb = TAILQ_HEAD_INITIALIZER(netcb);
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static int aflag = 0;
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static int nflag = 0;
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static int lastrow = 1;
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void
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closenetstat(w)
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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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TAILQ_FOREACH(p, &netcb, chain) {
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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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}
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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 const char *miblist[] = {
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"net.inet.tcp.pcblist",
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"net.inet.udp.pcblist"
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};
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struct nlist namelist[] = {
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#define X_TCB 0
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{ "tcb" },
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#define X_UDB 1
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{ "udb" },
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{ "" },
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};
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int
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initnetstat()
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{
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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()
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{
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if (use_kvm)
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fetchnetstat_kvm();
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else
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fetchnetstat_sysctl();
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}
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static void
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fetchnetstat_kvm()
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{
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struct inpcb *next;
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struct netinfo *p;
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struct inpcbhead head;
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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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void *off;
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int istcp;
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if (namelist[X_TCB].n_value == 0)
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return;
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TAILQ_FOREACH(p, &netcb, chain)
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p->ni_seen = 0;
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if (protos&TCP) {
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off = NPTR(X_TCB);
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istcp = 1;
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}
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else if (protos&UDP) {
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off = NPTR(X_UDB);
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istcp = 0;
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}
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else {
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error("No protocols to display");
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return;
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}
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again:
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KREAD(off, &head, sizeof (struct inpcbhead));
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LIST_FOREACH(next, &head, inp_list) {
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KREAD(next, &inpcb, sizeof (inpcb));
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next = &inpcb;
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if (!aflag) {
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if (inpcb.inp_vflag & INP_IPV4) {
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if (inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
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continue;
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}
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#ifdef INET6
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else if (inpcb.inp_vflag & INP_IPV6) {
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if (memcmp(&inpcb.in6p_laddr,
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&in6addr_any, sizeof(in6addr_any)) == 0)
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continue;
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}
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#endif
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}
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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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if (istcp) {
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if (inpcb.inp_vflag & INP_TIMEWAIT) {
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bzero(&sockb, sizeof(sockb));
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enter_kvm(&inpcb, &sockb, TCPS_TIME_WAIT,
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"tcp");
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} else {
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KREAD(inpcb.inp_socket, &sockb,
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sizeof (sockb));
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KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
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enter_kvm(&inpcb, &sockb, tcpcb.t_state,
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"tcp");
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}
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} else
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enter_kvm(&inpcb, &sockb, 0, "udp");
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}
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if (istcp && (protos&UDP)) {
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istcp = 0;
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off = NPTR(X_UDB);
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goto again;
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}
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}
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static void
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fetchnetstat_sysctl()
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{
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struct netinfo *p;
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int idx;
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struct xinpgen *inpg;
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char *cur, *end;
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struct inpcb *inpcb;
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struct xinpcb *xip;
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struct xtcpcb *xtp;
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int plen;
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size_t lsz;
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TAILQ_FOREACH(p, &netcb, chain)
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p->ni_seen = 0;
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if (protos&TCP) {
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idx = 0;
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} else if (protos&UDP) {
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idx = 1;
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} else {
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error("No protocols to display");
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return;
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}
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for (;idx < 2; idx++) {
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if (idx == 1 && !(protos&UDP))
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break;
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inpg = (struct xinpgen *)sysctl_dynread(miblist[idx], &lsz);
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if (inpg == NULL) {
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error("sysctl(%s...) failed", miblist[idx]);
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continue;
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}
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/*
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* We currently do no require a consistent pcb list.
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* Try to be robust in case of struct size changes
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*/
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cur = ((char *)inpg) + inpg->xig_len;
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/* There is also a trailing struct xinpgen */
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end = ((char *)inpg) + lsz - inpg->xig_len;
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if (end <= cur) {
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free(inpg);
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continue;
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}
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if (idx == 0) { /* TCP */
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xtp = (struct xtcpcb *)cur;
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plen = xtp->xt_len;
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} else {
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xip = (struct xinpcb *)cur;
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plen = xip->xi_len;
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}
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while (cur + plen <= end) {
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if (idx == 0) { /* TCP */
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xtp = (struct xtcpcb *)cur;
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inpcb = &xtp->xt_inp;
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} else {
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xip = (struct xinpcb *)cur;
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inpcb = &xip->xi_inp;
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}
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cur += plen;
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if (!aflag) {
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if (inpcb->inp_vflag & INP_IPV4) {
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if (inet_lnaof(inpcb->inp_laddr) ==
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INADDR_ANY)
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continue;
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}
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#ifdef INET6
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else if (inpcb->inp_vflag & INP_IPV6) {
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if (memcmp(&inpcb->in6p_laddr,
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&in6addr_any, sizeof(in6addr_any))
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== 0)
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continue;
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}
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#endif
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}
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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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if (idx == 0) /* TCP */
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enter_sysctl(inpcb, &xtp->xt_socket,
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xtp->xt_tp.t_state, "tcp");
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else /* UDP */
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enter_sysctl(inpcb, &xip->xi_socket, 0, "udp");
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}
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free(inpg);
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}
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}
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static void
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enter_kvm(inp, so, state, proto)
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struct inpcb *inp;
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struct socket *so;
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int state;
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const char *proto;
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{
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struct netinfo *p;
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if ((p = enter(inp, state, proto)) != NULL) {
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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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}
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}
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static void
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enter_sysctl(inp, so, state, proto)
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struct inpcb *inp;
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struct xsocket *so;
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int state;
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const char *proto;
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{
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struct netinfo *p;
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if ((p = enter(inp, state, proto)) != NULL) {
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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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}
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}
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static struct netinfo *
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enter(inp, state, proto)
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struct inpcb *inp;
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int state;
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const char *proto;
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{
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struct netinfo *p;
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struct sockaddr_storage lsa, fsa;
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struct sockaddr_in *sa4;
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#ifdef INET6
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struct sockaddr_in6 *sa6;
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#endif
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memset(&lsa, 0, sizeof(lsa));
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memset(&fsa, 0, sizeof(fsa));
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if (inp->inp_vflag & INP_IPV4) {
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sa4 = (struct sockaddr_in *)&lsa;
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sa4->sin_addr = inp->inp_laddr;
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sa4->sin_port = inp->inp_lport;
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sa4->sin_family = AF_INET;
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sa4->sin_len = sizeof(struct sockaddr_in);
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sa4 = (struct sockaddr_in *)&fsa;
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sa4->sin_addr = inp->inp_faddr;
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sa4->sin_port = inp->inp_fport;
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sa4->sin_family = AF_INET;
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sa4->sin_len = sizeof(struct sockaddr_in);
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}
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#ifdef INET6
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else if (inp->inp_vflag & INP_IPV6) {
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sa6 = (struct sockaddr_in6 *)&lsa;
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memcpy(&sa6->sin6_addr, &inp->in6p_laddr,
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sizeof(struct in6_addr));
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sa6->sin6_port = inp->inp_lport;
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sa6->sin6_family = AF_INET6;
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sa6->sin6_len = sizeof(struct sockaddr_in6);
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sa6 = (struct sockaddr_in6 *)&fsa;
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memcpy(&sa6->sin6_addr, &inp->in6p_faddr,
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sizeof(struct in6_addr));
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sa6->sin6_port = inp->inp_fport;
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sa6->sin6_family = AF_INET6;
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sa6->sin6_len = sizeof(struct sockaddr_in6);
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}
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#endif
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else
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return NULL;
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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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TAILQ_FOREACH(p, &netcb, chain) {
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if (!streq(proto, p->ni_proto))
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continue;
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if (p->ni_lsa.ss_family != lsa.ss_family ||
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memcmp(&p->ni_lsa, &lsa, lsa.ss_len) != 0)
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continue;
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if (p->ni_fsa.ss_family == fsa.ss_family &&
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memcmp(&p->ni_fsa, &fsa, fsa.ss_len) == 0)
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break;
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}
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if (p == NULL) {
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if ((p = malloc(sizeof(*p))) == NULL) {
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error("Out of memory");
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return NULL;
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}
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TAILQ_INSERT_HEAD(&netcb, p, chain);
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p->ni_line = -1;
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memcpy(&p->ni_lsa, &lsa, lsa.ss_len);
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memcpy(&p->ni_fsa, &fsa, fsa.ss_len);
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p->ni_proto = strdup(proto);
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p->ni_flags = NIF_LACHG|NIF_FACHG;
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}
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p->ni_state = state;
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p->ni_seen = 1;
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return p;
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}
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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()
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{
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if (use_kvm && namelist[X_TCB].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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}
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void
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shownetstat()
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{
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struct netinfo *p, *q;
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char proto[6], *family = "";
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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 = TAILQ_FIRST(&netcb);
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while (p != NULL) {
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if (p->ni_line == -1 || p->ni_seen) {
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p = TAILQ_NEXT(p, chain);
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continue;
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}
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wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
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TAILQ_FOREACH(q, &netcb, chain)
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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 = TAILQ_NEXT(p, chain);
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TAILQ_REMOVE(&netcb, p, chain);
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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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TAILQ_FOREACH(p, &netcb, chain) {
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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 > YMAX(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);
|
|
inetprint((struct sockaddr *)&p->ni_lsa, p->ni_proto);
|
|
p->ni_flags &= ~NIF_LACHG;
|
|
}
|
|
if (p->ni_flags & NIF_FACHG) {
|
|
wmove(wnd, p->ni_line, FADDR);
|
|
inetprint((struct sockaddr *)&p->ni_fsa, p->ni_proto);
|
|
p->ni_flags &= ~NIF_FACHG;
|
|
}
|
|
#ifdef INET6
|
|
family = (p->ni_lsa.ss_family == AF_INET) ? "4" : "6";
|
|
#endif
|
|
snprintf(proto, sizeof(proto), "%s%s", p->ni_proto, family);
|
|
mvwaddstr(wnd, p->ni_line, PROTO, proto);
|
|
mvwprintw(wnd, p->ni_line, RCVCC, "%6u", p->ni_rcvcc);
|
|
mvwprintw(wnd, p->ni_line, SNDCC, "%6u", 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 < YMAX(wnd)) {
|
|
wmove(wnd, lastrow, 0); wclrtobot(wnd);
|
|
wmove(wnd, YMAX(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(sa, proto)
|
|
struct sockaddr *sa;
|
|
const char *proto;
|
|
{
|
|
struct servent *sp = 0;
|
|
char line[80], *cp;
|
|
int port;
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
port = ((struct sockaddr_in *)sa)->sin_port;
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
port = ((struct sockaddr_in6 *)sa)->sin6_port;
|
|
break;
|
|
#endif
|
|
default:
|
|
port = 0;
|
|
break;
|
|
}
|
|
snprintf(line, sizeof(line), "%.*s.", 16, inetname(sa));
|
|
cp = index(line, '\0');
|
|
if (!nflag && port)
|
|
sp = getservbyport(port, proto);
|
|
if (sp || port == 0)
|
|
snprintf(cp, sizeof(line) - (cp - line), "%.8s",
|
|
sp ? sp->s_name : "*");
|
|
else
|
|
snprintf(cp, sizeof(line) - (cp - line), "%d",
|
|
ntohs((u_short)port));
|
|
/* pad to full column to clear any garbage */
|
|
cp = index(line, '\0');
|
|
while (cp - line < 22)
|
|
*cp++ = ' ';
|
|
line[22] = '\0';
|
|
waddstr(wnd, line);
|
|
}
|
|
|
|
/*
|
|
* Construct an Internet address representation.
|
|
* If the nflag has been supplied, give
|
|
* numeric value, otherwise try for symbolic name.
|
|
*/
|
|
static char *
|
|
inetname(sa)
|
|
struct sockaddr *sa;
|
|
{
|
|
char *cp = 0;
|
|
static char line[NI_MAXHOST];
|
|
struct hostent *hp;
|
|
struct netent *np;
|
|
struct in_addr in;
|
|
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
if (memcmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
|
|
&in6addr_any, sizeof(in6addr_any)) == 0)
|
|
strcpy(line, "*");
|
|
else
|
|
getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
|
|
nflag ? NI_NUMERICHOST : 0);
|
|
return (line);
|
|
}
|
|
#endif
|
|
|
|
in = ((struct sockaddr_in *)sa)->sin_addr;
|
|
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)
|
|
strcpy(line, "*");
|
|
else if (cp)
|
|
snprintf(line, sizeof(line), "%s", cp);
|
|
else {
|
|
in.s_addr = ntohl(in.s_addr);
|
|
#define C(x) ((x) & 0xff)
|
|
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));
|
|
}
|
|
return (line);
|
|
}
|
|
|
|
int
|
|
cmdnetstat(cmd, args)
|
|
const char *cmd, *args;
|
|
{
|
|
if (prefix(cmd, "all")) {
|
|
aflag = !aflag;
|
|
goto fixup;
|
|
}
|
|
if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
|
|
struct netinfo *p;
|
|
int new;
|
|
|
|
new = prefix(cmd, "numbers");
|
|
if (new == nflag)
|
|
return (1);
|
|
TAILQ_FOREACH(p, &netcb, chain) {
|
|
if (p->ni_line == -1)
|
|
continue;
|
|
p->ni_flags |= NIF_LACHG|NIF_FACHG;
|
|
}
|
|
nflag = new;
|
|
goto redisplay;
|
|
}
|
|
if (!netcmd(cmd, args))
|
|
return (0);
|
|
fixup:
|
|
fetchnetstat();
|
|
redisplay:
|
|
shownetstat();
|
|
refresh();
|
|
return (1);
|
|
}
|