1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 34 * $FreeBSD$ 35 */ 36 37 #include "opt_inet.h" 38 #include "opt_tcpdebug.h" 39 40 #ifndef INET 41 #error The option TCPDEBUG requires option INET. 42 #endif 43 44 #ifdef TCPDEBUG 45 /* load symbolic names */ 46 #define PRUREQUESTS 47 #define TCPSTATES 48 #define TCPTIMERS 49 #define TANAMES 50 #endif 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/protosw.h> 55 56 #include <netinet/in.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/ip_var.h> 59 #include <netinet/tcp.h> 60 #include <netinet/tcp_fsm.h> 61 #include <netinet/tcp_timer.h> 62 #include <netinet/tcp_var.h> 63 #include <netinet/tcpip.h> 64 #include <netinet/tcp_debug.h> 65 66 #ifdef TCPDEBUG 67 static int tcpconsdebug = 0; 68 #endif 69 70 static struct tcp_debug tcp_debug[TCP_NDEBUG]; 71 static int tcp_debx; 72 73 /* 74 * Tcp debug routines 75 */ 76 void 77 tcp_trace(act, ostate, tp, ti, req) 78 short act, ostate; 79 struct tcpcb *tp; 80 struct tcpiphdr *ti; 81 int req; 82 { 83 tcp_seq seq, ack; 84 int len, flags; 85 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 86 87 if (tcp_debx == TCP_NDEBUG) 88 tcp_debx = 0; 89 td->td_time = iptime(); 90 td->td_act = act; 91 td->td_ostate = ostate; 92 td->td_tcb = (caddr_t)tp; 93 if (tp) 94 td->td_cb = *tp; 95 else 96 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 97 if (ti) 98 td->td_ti = *ti; 99 else 100 bzero((caddr_t)&td->td_ti, sizeof (*ti)); 101 td->td_req = req; 102 #ifdef TCPDEBUG 103 if (tcpconsdebug == 0) 104 return; 105 if (tp) 106 printf("%p %s:", tp, tcpstates[ostate]); 107 else 108 printf("???????? "); 109 printf("%s ", tanames[act]); 110 switch (act) { 111 112 case TA_INPUT: 113 case TA_OUTPUT: 114 case TA_DROP: 115 if (ti == 0) 116 break; 117 seq = ti->ti_seq; 118 ack = ti->ti_ack; 119 len = ti->ti_len; 120 if (act == TA_OUTPUT) { 121 seq = ntohl(seq); 122 ack = ntohl(ack); 123 len = ntohs((u_short)len); 124 } 125 if (act == TA_OUTPUT) 126 len -= sizeof (struct tcphdr); 127 if (len) 128 printf("[%x..%x)", seq, seq+len); 129 else 130 printf("%x", seq); 131 printf("@%x, urp=%x", ack, ti->ti_urp); 132 flags = ti->ti_flags; 133 if (flags) { 134 char *cp = "<"; 135 #define pf(f) { \ 136 if (ti->ti_flags & TH_##f) { \ 137 printf("%s%s", cp, #f); \ 138 cp = ","; \ 139 } \ 140 } 141 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 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( 159 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 160 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 161 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 162 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 163 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 164 #endif /* TCPDEBUG */ 165 } 166