/* $NetBSD: tcp_debug.c,v 1.32 2018/05/03 07:13:48 maxv Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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 project 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 PROJECT 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 PROJECT 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 (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. * * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.32 2018/05/03 07:13:48 maxv Exp $"); #ifdef _KERNEL_OPT #include "opt_inet.h" #include "opt_tcp_debug.h" #endif /* load symbolic names */ #define PRUREQUESTS #define TCPSTATES #define TCPTIMERS #define TANAMES #include <sys/param.h> #include <sys/systm.h> #include <sys/mbuf.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/protosw.h> #include <sys/errno.h> #include <net/if.h> #include <netinet/in.h> #include <netinet/in_systm.h> #include <netinet/ip.h> #include <netinet/in_pcb.h> #include <netinet/ip_var.h> #ifdef INET6 #include <netinet/ip6.h> #endif #include <netinet/tcp.h> #include <netinet/tcp_fsm.h> #include <netinet/tcp_seq.h> #include <netinet/tcp_timer.h> #include <netinet/tcp_var.h> #include <netinet/tcp_debug.h> struct tcp_debug tcp_debug[TCP_NDEBUG]; int tcp_debx; int tcpconsdebug = 0; /* * Tcp debug routines */ void tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req) { tcp_seq seq, ack; int len, flags; struct tcphdr *th; struct tcp_debug *td = &tcp_debug[tcp_debx++]; if (tcp_debx == TCP_NDEBUG) tcp_debx = 0; td->td_time = iptime(); td->td_act = act; td->td_ostate = ostate; td->td_tcb = (void *)tp; if (tp) td->td_cb = *tp; else memset((void *)&td->td_cb, 0, sizeof (*tp)); td->td_family = tp->t_family; memset((void *)&td->td_ti, 0, sizeof (td->td_ti)); #ifdef INET6 memset((void *)&td->td_ti6, 0, sizeof (td->td_ti6)); #endif th = NULL; if (m) { struct ip *ip; ip = mtod(m, struct ip *); switch (ip->ip_v) { case 4: if (m->m_len < sizeof(td->td_ti)) break; memcpy(&td->td_ti, mtod(m, void *), sizeof(td->td_ti)); th = (struct tcphdr *)((char *)&td->td_ti + sizeof(struct ip)); break; #ifdef INET6 case 6: if (m->m_len < sizeof(td->td_ti6)) break; memcpy(&td->td_ti6, mtod(m, void *), sizeof(td->td_ti6)); th = (struct tcphdr *)((char *)&td->td_ti6 + sizeof(struct ip6_hdr)); break; #endif } } td->td_req = req; if (tcpconsdebug == 0) return; if (tp) printf("%p %s:", tp, tcpstates[ostate]); else printf("???????? "); printf("%s ", tanames[act]); switch (act) { case TA_INPUT: case TA_OUTPUT: case TA_DROP: if (th == 0) break; seq = th->th_seq; ack = th->th_ack; len = m->m_pkthdr.len; if (act == TA_OUTPUT) { seq = ntohl(seq); ack = ntohl(ack); len = ntohs((u_int16_t)len); } if (act == TA_OUTPUT) len -= sizeof (struct tcphdr); 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) { #ifndef lint const char *cp = "<"; #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \ printf("%s%s", cp, "f"); cp = ","; } } pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); #endif printf(">"); } break; case TA_USER: printf("%s", prurequests[req&0xff]); if ((req & 0xff) == PRU_SLOWTIMO) printf("<%s>", tcptimers[req>>8]); break; } if (tp) printf(" -> %s", tcpstates[tp->t_state]); /* print out internal state of tp !?! */ printf("\n"); if (tp == 0) 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); }
