mirror of
https://git.rtems.org/rtems-libbsd/
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Move rtems/freebsd to freebsd and contrib to freebsd/contrib
This commit is contained in:
Joel Sherrill
226
freebsd/netinet/tcp_debug.c
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226
freebsd/netinet/tcp_debug.c
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#include <rtems/freebsd/machine/rtems-bsd-config.h>
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/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California.
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* 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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* @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
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*/
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#include <rtems/freebsd/sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <rtems/freebsd/local/opt_inet.h>
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#include <rtems/freebsd/local/opt_inet6.h>
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#include <rtems/freebsd/local/opt_tcpdebug.h>
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#ifdef TCPDEBUG
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/* load symbolic names */
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#define PRUREQUESTS
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#define TCPSTATES
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#define TCPTIMERS
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#define TANAMES
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#endif
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#include <rtems/freebsd/sys/param.h>
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#include <rtems/freebsd/sys/systm.h>
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#include <rtems/freebsd/sys/kernel.h>
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#include <rtems/freebsd/sys/lock.h>
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#include <rtems/freebsd/sys/mbuf.h>
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#include <rtems/freebsd/sys/mutex.h>
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#include <rtems/freebsd/sys/protosw.h>
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#include <rtems/freebsd/sys/socket.h>
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#include <rtems/freebsd/netinet/in.h>
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#include <rtems/freebsd/netinet/in_systm.h>
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#include <rtems/freebsd/netinet/ip.h>
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#ifdef INET6
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#include <rtems/freebsd/netinet/ip6.h>
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#endif
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#include <rtems/freebsd/netinet/ip_var.h>
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#include <rtems/freebsd/netinet/tcp.h>
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#include <rtems/freebsd/netinet/tcp_fsm.h>
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#include <rtems/freebsd/netinet/tcp_timer.h>
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#include <rtems/freebsd/netinet/tcp_var.h>
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#include <rtems/freebsd/netinet/tcpip.h>
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#include <rtems/freebsd/netinet/tcp_debug.h>
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#ifdef TCPDEBUG
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static int tcpconsdebug = 0;
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#endif
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/*
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* Global ring buffer of TCP debugging state. Each entry captures a snapshot
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* of TCP connection state at any given moment. tcp_debx addresses at the
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* next available slot. There is no explicit export of this data structure;
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* it will be read via /dev/kmem by debugging tools.
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*/
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static struct tcp_debug tcp_debug[TCP_NDEBUG];
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static int tcp_debx;
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/*
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* All global state is protected by tcp_debug_mtx; tcp_trace() is split into
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* two parts, one of which saves connection and other state into the global
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* array (locked by tcp_debug_mtx).
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*/
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struct mtx tcp_debug_mtx;
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MTX_SYSINIT(tcp_debug_mtx, &tcp_debug_mtx, "tcp_debug_mtx", MTX_DEF);
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/*
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* Save TCP state at a given moment; optionally, both tcpcb and TCP packet
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* header state will be saved.
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*/
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void
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tcp_trace(short act, short ostate, struct tcpcb *tp, void *ipgen,
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struct tcphdr *th, int req)
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{
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#ifdef INET6
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int isipv6;
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#endif /* INET6 */
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tcp_seq seq, ack;
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int len, flags;
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struct tcp_debug *td;
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mtx_lock(&tcp_debug_mtx);
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td = &tcp_debug[tcp_debx++];
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if (tcp_debx == TCP_NDEBUG)
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tcp_debx = 0;
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bzero(td, sizeof(*td));
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#ifdef INET6
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isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0;
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#endif /* INET6 */
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td->td_family =
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#ifdef INET6
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(isipv6 != 0) ? AF_INET6 :
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#endif
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AF_INET;
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#ifdef INET
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td->td_time = iptime();
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#endif
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td->td_act = act;
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td->td_ostate = ostate;
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td->td_tcb = (caddr_t)tp;
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if (tp != NULL)
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td->td_cb = *tp;
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if (ipgen != NULL) {
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switch (td->td_family) {
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#ifdef INET
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case AF_INET:
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bcopy(ipgen, &td->td_ti.ti_i, sizeof(td->td_ti.ti_i));
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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bcopy(ipgen, td->td_ip6buf, sizeof(td->td_ip6buf));
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break;
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#endif
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}
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}
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if (th != NULL) {
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switch (td->td_family) {
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#ifdef INET
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case AF_INET:
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td->td_ti.ti_t = *th;
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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td->td_ti6.th = *th;
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break;
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#endif
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}
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}
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td->td_req = req;
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mtx_unlock(&tcp_debug_mtx);
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#ifdef TCPDEBUG
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if (tcpconsdebug == 0)
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return;
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if (tp != NULL)
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printf("%p %s:", tp, tcpstates[ostate]);
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else
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printf("???????? ");
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printf("%s ", 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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if (ipgen == NULL || th == NULL)
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break;
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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 ? ntohs(((struct ip6_hdr *)ipgen)->ip6_plen) :
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#endif
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((struct ip *)ipgen)->ip_len;
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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((u_short)len);
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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, urp=%x", ack, th->th_urp);
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flags = th->th_flags;
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if (flags) {
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char *cp = "<";
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#define pf(f) { \
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if (th->th_flags & TH_##f) { \
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printf("%s%s", cp, #f); \
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cp = ","; \
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} \
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}
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pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(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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printf("%s", prurequests[req&0xff]);
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if ((req & 0xff) == PRU_SLOWTIMO)
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printf("<%s>", tcptimers[req>>8]);
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break;
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}
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if (tp != NULL)
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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 (tp == NULL)
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return;
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printf(
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"\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n",
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(u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up,
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(u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max);
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printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n",
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(u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd);
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#endif /* TCPDEBUG */
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}
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