1 /* $OpenBSD: tcp_debug.c,v 1.3 1998/11/17 19:23:01 provos Exp $ */ 2 /* $NetBSD: tcp_debug.c,v 1.10 1996/02/13 23:43:36 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 37 */ 38 39 #ifdef TCPDEBUG 40 /* load symbolic names */ 41 #define PRUREQUESTS 42 #define TCPSTATES 43 #define TCPTIMERS 44 #define TANAMES 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/mbuf.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/protosw.h> 53 #include <sys/errno.h> 54 55 #include <net/route.h> 56 #include <net/if.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/ip.h> 61 #include <netinet/in_pcb.h> 62 #include <netinet/ip_var.h> 63 #include <netinet/tcp.h> 64 #include <netinet/tcp_fsm.h> 65 #include <netinet/tcp_seq.h> 66 #include <netinet/tcp_timer.h> 67 #include <netinet/tcp_var.h> 68 #include <netinet/tcpip.h> 69 #include <netinet/tcp_debug.h> 70 71 #ifdef TCPDEBUG 72 int tcpconsdebug = 0; 73 #endif 74 /* 75 * Tcp debug routines 76 */ 77 void 78 tcp_trace(act, ostate, tp, ti, req) 79 short act, ostate; 80 struct tcpcb *tp; 81 struct tcpiphdr *ti; 82 int req; 83 { 84 #ifdef TCPDEBUG 85 tcp_seq seq, ack; 86 int len, flags; 87 #endif 88 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 89 90 if (tcp_debx == TCP_NDEBUG) 91 tcp_debx = 0; 92 td->td_time = iptime(); 93 td->td_act = act; 94 td->td_ostate = ostate; 95 td->td_tcb = (caddr_t)tp; 96 if (tp) 97 td->td_cb = *tp; 98 else 99 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 100 if (ti) 101 td->td_ti = *ti; 102 else 103 bzero((caddr_t)&td->td_ti, sizeof (*ti)); 104 td->td_req = req; 105 #ifdef TCPDEBUG 106 if (tcpconsdebug == 0) 107 return; 108 if (tp) 109 printf("%x %s:", tp, tcpstates[ostate]); 110 else 111 printf("???????? "); 112 printf("%s ", tanames[act]); 113 switch (act) { 114 115 case TA_INPUT: 116 case TA_OUTPUT: 117 case TA_DROP: 118 if (ti == 0) 119 break; 120 seq = ti->ti_seq; 121 ack = ti->ti_ack; 122 len = ti->ti_len; 123 if (act == TA_OUTPUT) { 124 seq = ntohl(seq); 125 ack = ntohl(ack); 126 len = ntohs((u_int16_t)len); 127 } 128 if (act == TA_OUTPUT) 129 len -= sizeof (struct tcphdr); 130 if (len) 131 printf("[%x..%x)", seq, seq+len); 132 else 133 printf("%x", seq); 134 printf("@%x, urp=%x", ack, ti->ti_urp); 135 flags = ti->ti_flags; 136 if (flags) { 137 #ifndef lint 138 char *cp = "<"; 139 #define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } } 140 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 141 #endif 142 printf(">"); 143 } 144 break; 145 146 case TA_USER: 147 printf("%s", prurequests[req&0xff]); 148 if ((req & 0xff) == PRU_SLOWTIMO) 149 printf("<%s>", tcptimers[req>>8]); 150 break; 151 } 152 if (tp) 153 printf(" -> %s", tcpstates[tp->t_state]); 154 /* print out internal state of tp !?! */ 155 printf("\n"); 156 if (tp == 0) 157 return; 158 printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 159 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 160 tp->snd_max); 161 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n", 162 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 163 #endif /* TCPDEBUG */ 164 } 165