466 lines
11 KiB
C
466 lines
11 KiB
C
/*
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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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* 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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#if 0
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#ifndef lint
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static const char 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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static char sccsid[] = "@(#)trpt.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <sys/time.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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#ifdef INET6
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#include <netinet/ip6.h>
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#endif
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#include <netinet/ip_var.h>
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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 <nlist.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct nlist nl[3];
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#define N_TCP_DEBUG 0
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#define N_TCP_DEBX 1
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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, kflag, memf, follow, sflag, tflag;
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void dotrace(caddr_t);
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void klseek(int, off_t, int);
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int numeric(const void *, const void *);
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void tcp_trace(short, short, struct tcpcb *, int, void *, struct tcphdr *, int);
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static void usage(void);
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int
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main(int argc, char **argv)
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{
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int ch, i, jflag, npcbs;
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const char *core, *syst;
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nl[0].n_name = strdup("_tcp_debug");
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nl[1].n_name = strdup("_tcp_debx");
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jflag = npcbs = 0;
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while ((ch = getopt(argc, argv, "afjp:st")) != -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 pcb's specified");
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(void)sscanf(optarg, "%x", (int *)&tcp_pcbs[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 '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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core = _PATH_KMEM;
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if (argc > 0) {
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syst = *argv;
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argc--, argv++;
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if (argc > 0) {
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core = *argv;
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argc--, argv++;
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++kflag;
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}
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/*
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* Discard setgid privileges if not the running kernel so that
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* bad guys can't print interesting stuff from kernel memory.
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*/
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if (setgid(getgid()) != 0)
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err(1, "setgid");
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}
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else
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syst = getbootfile();
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if (nlist(syst, nl) < 0 || !nl[0].n_value)
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errx(1, "%s: no namelist", syst);
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if ((memf = open(core, O_RDONLY)) < 0)
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err(2, "%s", core);
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if (setgid(getgid()) != 0)
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err(1, "setgid");
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if (kflag)
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errx(1, "can't do core files yet");
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(void)klseek(memf, (off_t)nl[N_TCP_DEBX].n_value, L_SET);
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if (read(memf, (char *)&tcp_debx, sizeof(tcp_debx)) !=
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sizeof(tcp_debx))
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err(3, "tcp_debx");
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(void)klseek(memf, (off_t)nl[N_TCP_DEBUG].n_value, L_SET);
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if (read(memf, (char *)tcp_debug, sizeof(tcp_debug)) !=
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sizeof(tcp_debug))
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err(3, "tcp_debug");
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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) {
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for (i = 0; i < TCP_NDEBUG; i++) {
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register struct tcp_debug *td = &tcp_debug[i];
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register 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)
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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("%p", (void *)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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}
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else for (i = 0; i < npcbs; i++) {
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printf("\n%p:\n", tcp_pcbs[i]);
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dotrace(tcp_pcbs[i]);
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}
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exit(0);
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: trpt [-afjst] [-p hex-address] [system [core]]\n");
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exit(1);
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}
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void
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dotrace(tcpcb)
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register caddr_t tcpcb;
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{
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register struct tcp_debug *td;
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register int i;
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int prev_debx = tcp_debx, family;
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again: 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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#ifdef INET6
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family = td->td_family;
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#else
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family = AF_INET;
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#endif
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switch(family) {
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case AF_INET:
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tcp_trace(td->td_act, td->td_ostate,
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&td->td_cb, td->td_family, &td->td_ti.ti_i,
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&td->td_ti.ti_t, 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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&td->td_cb, td->td_family, &td->td_ti6.ip6,
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&td->td_ti6.th, td->td_req);
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break;
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#endif
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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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#ifdef INET6
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family = td->td_family;
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#else
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family = AF_INET;
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#endif
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switch(family) {
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case AF_INET:
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tcp_trace(td->td_act, td->td_ostate,
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&td->td_cb, td->td_family, &td->td_ti.ti_i,
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&td->td_ti.ti_t, 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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&td->td_cb, td->td_family, &td->td_ti6.ip6,
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&td->td_ti6.th, td->td_req);
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break;
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#endif
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}
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}
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done: 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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(void)klseek(memf, (off_t)nl[N_TCP_DEBX].n_value, L_SET);
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if (read(memf, (char *)&tcp_debx, sizeof(tcp_debx)) !=
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sizeof(tcp_debx))
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err(3, "tcp_debx");
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} while (tcp_debx == prev_debx);
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(void)klseek(memf, (off_t)nl[N_TCP_DEBUG].n_value, L_SET);
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if (read(memf, (char *)tcp_debug, sizeof(tcp_debug)) !=
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sizeof(tcp_debug))
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err(3, "tcp_debug");
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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(short act, short ostate, struct tcpcb *tp, int family __unused,
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void *ip, struct tcphdr *th, 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 ip *ip4;
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#ifdef INET6
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int isipv6, nopkt = 1;
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struct ip6_hdr *ip6;
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char ntop_buf[INET6_ADDRSTRLEN];
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#endif
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#ifdef INET6
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switch (family) {
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case AF_INET:
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nopkt = 0;
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isipv6 = 0;
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ip4 = (struct ip *)ip;
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break;
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case AF_INET6:
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nopkt = 0;
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isipv6 = 1;
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ip6 = (struct ip6_hdr *)ip;
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case 0:
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default:
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break;
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}
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#else
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ip4 = (struct ip *)ip;
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#endif
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printf("%03ld %s:%s ", (long)((ntime/10) % 1000), tcpstates[ostate],
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tanames[act]);
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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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#ifdef INET6
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if (nopkt != 0)
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break;
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#endif
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if (aflag) {
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printf("(src=%s,%u, ",
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#ifdef INET6
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isipv6
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? inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf,
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sizeof(ntop_buf)) :
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#endif
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inet_ntoa(ip4->ip_src),
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ntohs(th->th_sport));
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printf("dst=%s,%u)",
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#ifdef INET6
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isipv6
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? inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf,
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sizeof(ntop_buf)) :
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#endif
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inet_ntoa(ip4->ip_dst),
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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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len =
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#ifdef INET6
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isipv6 ? ip6->ip6_plen :
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#endif
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ip4->ip_len;
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win = th->th_win;
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if (act == TA_OUTPUT) {
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seq = ntohl(seq);
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ack = ntohl(ack);
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len = ntohs(len);
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win = 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("[%lx..%lx)", (u_long)seq, (u_long)(seq + len));
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else
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printf("%lx", (u_long)seq);
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printf("@%lx", (u_long)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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const 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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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 %lx rcv_wnd %lx snd_una %lx snd_nxt %lx snd_max %lx\n",
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(u_long)tp->rcv_nxt, tp->rcv_wnd,
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(u_long)tp->snd_una, (u_long)tp->snd_nxt,
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(u_long)tp->snd_max);
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printf("\tsnd_wl1 %lx snd_wl2 %lx snd_wnd %lx\n",
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(u_long)tp->snd_wl1,
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(u_long)tp->snd_wl2, tp->snd_wnd);
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}
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/* print out timers? */
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#if 0
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/*
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* XXX
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* kernel now uses callouts, not integer time values.
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*/
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if (tflag) {
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register char *cp = "\t";
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register int i;
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for (i = 0; i < TCPT_NTIMERS; i++) {
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if (tp->t_timer[i] == 0)
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continue;
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printf("%s%s=%d", cp, tcptimers[i], tp->t_timer[i]);
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if (i == TCPT_REXMT)
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printf(" (t_rxtshft=%d)", tp->t_rxtshift);
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cp = ", ";
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}
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if (*cp != '\t')
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putchar('\n');
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}
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#endif
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}
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int
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numeric(v1, v2)
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const void *v1, *v2;
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{
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const caddr_t *c1 = v1, *c2 = v2;
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return(*c1 - *c2);
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}
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void
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klseek(fd, base, off)
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int fd, off;
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off_t base;
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{
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(void)lseek(fd, base, off);
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}
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