/* $OpenBSD: tcp_debug.c,v 1.33 2025/07/08 00:47:41 jsg 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/mutex.h> #include <sys/socket.h> #include <net/route.h> #include <netinet/in_systm.h> #include <netinet/ip.h> #include <netinet/ip6.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 TCPDEBUG #include <sys/protosw.h> #endif /* * Locks used to protect struct members in this file: * D TCP debug global mutex */ struct mutex tcp_debug_mtx = MUTEX_INITIALIZER(IPL_SOFTNET); #ifdef TCPDEBUG int tcpconsdebug = 0; #endif struct tcp_debug tcp_debug[TCP_NDEBUG]; /* [D] */ int tcp_debx; /* [D] */ /* * 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 struct tcphdr *th; tcp_seq seq, ack; int flags; #endif int pf = PF_UNSPEC; struct tcp_debug *td; struct tcpiphdr *ti; struct tcpipv6hdr *ti6; mtx_enter(&tcp_debug_mtx); td = &tcp_debug[tcp_debx++]; ti = (struct tcpiphdr *)headers; ti6 = (struct tcpipv6hdr *)headers; 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: #ifdef TCPDEBUG th = &ti6->ti6_t; #endif td->td_ti6 = *ti6; td->td_ti6.ti6_plen = len; break; #endif /* INET6 */ case PF_INET: #ifdef TCPDEBUG th = &ti->ti_t; #endif td->td_ti = *ti; td->td_ti.ti_len = len; break; default: headers = NULL; break; } } td->td_req = req; #ifdef TCPDEBUG if (tcpconsdebug == 0) goto done; 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) goto done; 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); done: #endif /* TCPDEBUG */ mtx_leave(&tcp_debug_mtx); }
