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/* $OpenBSD: tcp_debug.c,v 1.29 2019/04/05 14:42:06 bluhm Exp $ */
/* $NetBSD: tcp_debug.c,v 1.10 1996/02/13 23:43:36 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
*
* NRL grants permission for redistribution and use in source and binary
* forms, with or without modification, of the software and documentation
* created at NRL provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed at the Information
* Technology Division, US Naval Research Laboratory.
* 4. Neither the name of the NRL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the US Naval
* Research Laboratory (NRL).
*/
#ifdef TCPDEBUG
/* load symbolic names */
#define PRUREQUESTS
#define TCPSTATES
#define TCPTIMERS
#define TANAMES
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_debug.h>
#include <netinet/tcp_fsm.h>
#ifdef INET6
#include <netinet/ip6.h>
#endif /* INET6 */
#ifdef TCPDEBUG
int tcpconsdebug = 0;
#endif
struct tcp_debug tcp_debug[TCP_NDEBUG];
int tcp_debx;
/*
* Tcp debug routines
*/
void
tcp_trace(short act, short ostate, struct tcpcb *tp, struct tcpcb *otp,
caddr_t headers, int req, int len)
{
#ifdef TCPDEBUG
tcp_seq seq, ack;
int flags;
#endif
int pf = PF_UNSPEC;
struct tcp_debug *td = &tcp_debug[tcp_debx++];
struct tcpiphdr *ti = (struct tcpiphdr *)headers;
struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)headers;
struct tcphdr *th;
if (tcp_debx == TCP_NDEBUG)
tcp_debx = 0;
td->td_time = iptime();
td->td_act = act;
td->td_ostate = ostate;
td->td_tcb = (caddr_t)otp;
if (tp) {
pf = tp->pf;
td->td_cb = *tp;
} else
bzero((caddr_t)&td->td_cb, sizeof (*tp));
bzero(&td->td_ti6, sizeof(struct tcpipv6hdr));
bzero(&td->td_ti, sizeof(struct tcpiphdr));
if (headers) {
/* The address family may be in tcpcb or ip header. */
if (pf == PF_UNSPEC) {
switch (ti6->ti6_i.ip6_vfc & IPV6_VERSION_MASK) {
#ifdef INET6
case IPV6_VERSION:
pf = PF_INET6;
break;
#endif /* INET6 */
case IPVERSION:
pf = PF_INET;
break;
}
}
switch (pf) {
#ifdef INET6
case PF_INET6:
th = &ti6->ti6_t;
td->td_ti6 = *ti6;
td->td_ti6.ti6_plen = len;
break;
#endif /* INET6 */
case PF_INET:
th = &ti->ti_t;
td->td_ti = *ti;
td->td_ti.ti_len = len;
break;
default:
headers = NULL;
break;
}
}
td->td_req = req;
#ifdef TCPDEBUG
if (tcpconsdebug == 0)
return;
if (otp)
printf("%p %s:", otp, tcpstates[ostate]);
else
printf("???????? ");
printf("%s ", tanames[act]);
switch (act) {
case TA_INPUT:
case TA_OUTPUT:
case TA_DROP:
if (headers == NULL)
break;
seq = th->th_seq;
ack = th->th_ack;
if (act == TA_OUTPUT) {
seq = ntohl(seq);
ack = ntohl(ack);
}
if (len)
printf("[%x..%x)", seq, seq+len);
else
printf("%x", seq);
printf("@%x, urp=%x", ack, th->th_urp);
flags = th->th_flags;
if (flags) {
char *cp = "<";
#define pf(f) { if (th->th_flags&TH_##f) { printf("%s%s", cp, #f); cp = ","; } }
pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
printf(">");
}
break;
case TA_USER:
printf("%s", prurequests[req]);
break;
case TA_TIMER:
printf("%s", tcptimers[req]);
break;
}
if (tp)
printf(" -> %s", tcpstates[tp->t_state]);
/* print out internal state of tp !?! */
printf("\n");
if (tp == NULL)
return;
printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
tp->snd_max);
printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n",
tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
#endif /* TCPDEBUG */
}
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