561 lines
14 KiB
C
561 lines
14 KiB
C
/* $NetBSD: trpt.c,v 1.18 2003/09/19 08:24:07 itojun Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1983, 1988, 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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__COPYRIGHT(
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"@(#) Copyright (c) 1983, 1988, 1993\n\
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The 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[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: trpt.c,v 1.18 2003/09/19 08:24:07 itojun Exp $");
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#endif
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#endif /* not lint */
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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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#define PRUREQUESTS
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#include <sys/protosw.h>
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#include <sys/file.h>
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#include <net/route.h>
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#include <net/if.h>
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#include <netinet/in.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_var.h>
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet/ip6.h>
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#endif
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#include <netinet/tcp.h>
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#define TCPSTATES
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_seq.h>
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#define TCPTIMERS
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcpip.h>
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#define TANAMES
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#include <netinet/tcp_debug.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <stdio.h>
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#include <errno.h>
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#include <kvm.h>
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#include <nlist.h>
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#include <paths.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <unistd.h>
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struct nlist nl[] = {
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#define N_HARDCLOCK_TICKS 0
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{ "_hardclock_ticks" },
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#define N_TCP_DEBUG 1
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{ "_tcp_debug" },
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#define N_TCP_DEBX 2
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{ "_tcp_debx" },
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{ NULL },
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};
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static caddr_t tcp_pcbs[TCP_NDEBUG];
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static n_time ntime;
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static int aflag, follow, sflag, tflag;
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/* see sys/netinet/tcp_debug.c */
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struct tcp_debug tcp_debug[TCP_NDEBUG];
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int tcp_debx;
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int main __P((int, char *[]));
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void dotrace __P((caddr_t));
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void tcp_trace __P((short, short, struct tcpcb *, struct tcpcb *,
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int, void *, int));
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int numeric __P((const void *, const void *));
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void usage __P((void));
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kvm_t *kd;
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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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int ch, i, jflag, npcbs;
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char *system, *core, *cp, errbuf[_POSIX2_LINE_MAX];
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gid_t egid = getegid();
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unsigned long l;
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(void)setegid(getgid());
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system = core = NULL;
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jflag = npcbs = 0;
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while ((ch = getopt(argc, argv, "afjp:stN:M:")) != -1) {
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switch (ch) {
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case 'a':
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++aflag;
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break;
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case 'f':
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++follow;
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setlinebuf(stdout);
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break;
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case 'j':
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++jflag;
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break;
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case 'p':
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if (npcbs >= TCP_NDEBUG)
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errx(1, "too many pcbs specified");
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errno = 0;
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cp = NULL;
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l = strtoul(optarg, &cp, 16);
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tcp_pcbs[npcbs] = (caddr_t)l;
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if (*optarg == '\0' || *cp != '\0' || errno ||
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(unsigned long)tcp_pcbs[npcbs] != l)
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errx(1, "invalid address: %s", optarg);
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npcbs++;
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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;
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break;
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case 'N':
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system = optarg;
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break;
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case 'M':
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core = optarg;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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if (argc)
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usage();
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/*
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* Discard setgid privileges. If not the running kernel, we toss
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* them away totally so that bad guys can't print interesting stuff
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* from kernel memory, otherwise switch back to kmem for the
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* duration of the kvm_openfiles() call.
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*/
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if (core != NULL || system != NULL)
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setgid(getgid());
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else
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setegid(egid);
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kd = kvm_openfiles(system, core, NULL, O_RDONLY, errbuf);
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if (kd == NULL)
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errx(1, "can't open kmem: %s", errbuf);
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/* get rid of it now anyway */
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if (core == NULL && system == NULL)
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setgid(getgid());
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if (kvm_nlist(kd, nl))
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errx(2, "%s: no namelist", system ? system : _PATH_UNIX);
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if (kvm_read(kd, nl[N_TCP_DEBX].n_value, (char *)&tcp_debx,
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sizeof(tcp_debx)) != sizeof(tcp_debx))
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errx(3, "tcp_debx: %s", kvm_geterr(kd));
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if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug,
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sizeof(tcp_debug)) != sizeof(tcp_debug))
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errx(3, "tcp_debug: %s", kvm_geterr(kd));
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/*
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* If no control blocks have been specified, figure
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* out how many distinct one we have and summarize
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* them in tcp_pcbs for sorting the trace records
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* below.
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*/
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if (npcbs == 0) {
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for (i = 0; i < TCP_NDEBUG; i++) {
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struct tcp_debug *td = &tcp_debug[i];
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int j;
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if (td->td_tcb == 0)
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continue;
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for (j = 0; j < npcbs; j++)
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if (tcp_pcbs[j] == td->td_tcb)
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break;
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if (j >= npcbs)
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tcp_pcbs[npcbs++] = td->td_tcb;
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}
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if (npcbs == 0)
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exit(0);
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}
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qsort(tcp_pcbs, npcbs, sizeof(caddr_t), numeric);
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if (jflag) {
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for (i = 0;;) {
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printf("%lx", (long)tcp_pcbs[i]);
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if (++i == npcbs)
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break;
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fputs(", ", stdout);
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}
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putchar('\n');
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} else {
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for (i = 0; i < npcbs; i++) {
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printf("\n%lx:\n", (long)tcp_pcbs[i]);
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dotrace(tcp_pcbs[i]);
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}
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}
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exit(0);
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}
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void
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dotrace(tcpcb)
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caddr_t tcpcb;
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{
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struct tcp_debug *td;
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int prev_debx = tcp_debx;
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int i;
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again:
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if (--tcp_debx < 0)
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tcp_debx = TCP_NDEBUG - 1;
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for (i = prev_debx % TCP_NDEBUG; i < TCP_NDEBUG; i++) {
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td = &tcp_debug[i];
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if (tcpcb && td->td_tcb != tcpcb)
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continue;
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ntime = ntohl(td->td_time);
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switch (td->td_family) {
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case AF_INET:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, &td->td_ti, td->td_req);
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break;
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#ifdef INET6
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case AF_INET6:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, &td->td_ti6, td->td_req);
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break;
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#endif
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default:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, NULL, td->td_req);
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break;
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}
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if (i == tcp_debx)
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goto done;
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}
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for (i = 0; i <= tcp_debx % TCP_NDEBUG; i++) {
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td = &tcp_debug[i];
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if (tcpcb && td->td_tcb != tcpcb)
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continue;
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ntime = ntohl(td->td_time);
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switch (td->td_family) {
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case AF_INET:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, &td->td_ti, td->td_req);
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break;
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#ifdef INET6
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case AF_INET6:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, &td->td_ti6, td->td_req);
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break;
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#endif
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default:
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tcp_trace(td->td_act, td->td_ostate,
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(struct tcpcb *)td->td_tcb, &td->td_cb,
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td->td_family, NULL, td->td_req);
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break;
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}
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}
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done:
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if (follow) {
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prev_debx = tcp_debx + 1;
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if (prev_debx >= TCP_NDEBUG)
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prev_debx = 0;
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do {
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sleep(1);
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if (kvm_read(kd, nl[N_TCP_DEBX].n_value,
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(char *)&tcp_debx, sizeof(tcp_debx)) !=
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sizeof(tcp_debx))
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errx(3, "tcp_debx: %s", kvm_geterr(kd));
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} while (tcp_debx == prev_debx);
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if (kvm_read(kd, nl[N_TCP_DEBUG].n_value, (char *)tcp_debug,
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sizeof(tcp_debug)) != sizeof(tcp_debug))
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errx(3, "tcp_debug: %s", kvm_geterr(kd));
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goto again;
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}
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}
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/*
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* Tcp debug routines
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*/
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/*ARGSUSED*/
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void
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tcp_trace(act, ostate, atp, tp, family, packet, req)
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short act, ostate;
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struct tcpcb *atp, *tp;
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int family;
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void *packet;
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int req;
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{
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tcp_seq seq, ack;
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int flags, len, win, timer;
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struct tcphdr *th = NULL;
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struct ip *ip = NULL;
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#ifdef INET6
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struct ip6_hdr *ip6 = NULL;
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#endif
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char hbuf[MAXHOSTNAMELEN];
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switch (family) {
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case AF_INET:
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if (packet) {
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ip = (struct ip *)packet;
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th = (struct tcphdr *)(ip + 1);
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}
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break;
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#ifdef INET6
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case AF_INET6:
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if (packet) {
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ip6 = (struct ip6_hdr *)packet;
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th = (struct tcphdr *)(ip6 + 1);
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}
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break;
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#endif
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default:
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return;
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}
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printf("%03d %s:%s ", (ntime/10) % 1000, tcpstates[ostate],
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tanames[act]);
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#ifndef INET6
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if (!ip)
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#else
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if (!(ip || ip6))
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#endif
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goto skipact;
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switch (act) {
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case TA_INPUT:
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case TA_OUTPUT:
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case TA_DROP:
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if (aflag) {
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inet_ntop(family,
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#ifndef INET6
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(void *)&ip->ip_src,
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#else
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family == AF_INET ? (void *)&ip->ip_src
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: (void *)&ip6->ip6_src,
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#endif
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hbuf, sizeof(hbuf));
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printf("(src=%s,%u, ",
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hbuf, ntohs(th->th_sport));
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inet_ntop(family,
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#ifndef INET6
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(void *)&ip->ip_dst,
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#else
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family == AF_INET ? (void *)&ip->ip_dst
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: (void *)&ip6->ip6_dst,
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#endif
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hbuf, sizeof(hbuf));
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printf("dst=%s,%u)",
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hbuf, ntohs(th->th_dport));
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}
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seq = th->th_seq;
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ack = th->th_ack;
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if (ip)
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len = ip->ip_len;
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#ifdef INET6
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else if (ip6)
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len = ip6->ip6_plen;
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#endif
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win = th->th_win;
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if (act == TA_OUTPUT) {
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NTOHL(seq);
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NTOHL(ack);
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NTOHS(len);
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NTOHS(win);
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}
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if (act == TA_OUTPUT)
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len -= sizeof(struct tcphdr);
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if (len)
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printf("[%x..%x)", seq, seq + len);
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else
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printf("%x", seq);
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printf("@%x", ack);
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if (win)
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printf("(win=%x)", win);
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flags = th->th_flags;
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if (flags) {
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register char *cp = "<";
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#define pf(flag, string) { \
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if (th->th_flags&flag) { \
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(void)printf("%s%s", cp, string); \
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cp = ","; \
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} \
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}
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pf(TH_SYN, "SYN");
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pf(TH_ACK, "ACK");
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pf(TH_FIN, "FIN");
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pf(TH_RST, "RST");
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pf(TH_PUSH, "PUSH");
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pf(TH_URG, "URG");
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printf(">");
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}
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break;
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case TA_USER:
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timer = req >> 8;
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req &= 0xff;
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printf("%s", prurequests[req]);
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if (req == PRU_SLOWTIMO || req == PRU_FASTTIMO)
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printf("<%s>", tcptimers[timer]);
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break;
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}
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skipact:
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printf(" -> %s", tcpstates[tp->t_state]);
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/* print out internal state of tp !?! */
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printf("\n");
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if (sflag) {
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printf("\trcv_nxt %x rcv_wnd %lx snd_una %x snd_nxt %x snd_max %x\n",
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tp->rcv_nxt, tp->rcv_wnd, tp->snd_una, tp->snd_nxt,
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tp->snd_max);
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printf("\tsnd_wl1 %x snd_wl2 %x snd_wnd %lx\n", tp->snd_wl1,
|
|
tp->snd_wl2, tp->snd_wnd);
|
|
}
|
|
/* print out timers? */
|
|
if (tflag) {
|
|
register char *cp = "\t";
|
|
register int i;
|
|
int hardticks;
|
|
|
|
if (kvm_read(kd, nl[N_HARDCLOCK_TICKS].n_value,
|
|
(char *)&hardticks, sizeof(hardticks)) != sizeof(hardticks))
|
|
errx(3, "hardclock_ticks: %s", kvm_geterr(kd));
|
|
|
|
for (i = 0; i < TCPT_NTIMERS; i++) {
|
|
if ((tp->t_timer[i].c_flags & CALLOUT_PENDING) == 0)
|
|
continue;
|
|
printf("%s%s=%d", cp, tcptimers[i],
|
|
tp->t_timer[i].c_time - hardticks);
|
|
if (i == TCPT_REXMT)
|
|
printf(" (t_rxtshft=%d)", tp->t_rxtshift);
|
|
cp = ", ";
|
|
}
|
|
if (*cp != '\t')
|
|
putchar('\n');
|
|
}
|
|
}
|
|
|
|
int
|
|
numeric(v1, v2)
|
|
const void *v1, *v2;
|
|
{
|
|
const caddr_t *c1 = v1;
|
|
const caddr_t *c2 = v2;
|
|
int rv;
|
|
|
|
if (*c1 < *c2)
|
|
rv = -1;
|
|
else if (*c1 > *c2)
|
|
rv = 1;
|
|
else
|
|
rv = 0;
|
|
|
|
return (rv);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void) fprintf(stderr, "usage: %s [-afjst] [-p hex-address]"
|
|
" [-N system] [-M core]\n", getprogname());
|
|
exit(1);
|
|
}
|