tcp_debug.c revision 1.28.22.1
1 /* $NetBSD: tcp_debug.c,v 1.28.22.1 2017/12/03 11:39:04 jdolecek Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.28.22.1 2017/12/03 11:39:04 jdolecek Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_tcp_debug.h" 69 #endif 70 71 /* load symbolic names */ 72 #define PRUREQUESTS 73 #define TCPSTATES 74 #define TCPTIMERS 75 #define TANAMES 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/mbuf.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/protosw.h> 83 #include <sys/errno.h> 84 85 #include <net/if.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/ip_var.h> 92 93 #ifdef INET6 94 #ifndef INET 95 #include <netinet/in.h> 96 #endif 97 #include <netinet/ip6.h> 98 #endif 99 100 #include <netinet/tcp.h> 101 #include <netinet/tcp_fsm.h> 102 #include <netinet/tcp_seq.h> 103 #include <netinet/tcp_timer.h> 104 #include <netinet/tcp_var.h> 105 #include <netinet/tcpip.h> 106 #include <netinet/tcp_debug.h> 107 108 struct tcp_debug tcp_debug[TCP_NDEBUG]; 109 int tcp_debx; 110 int tcpconsdebug = 0; 111 /* 112 * Tcp debug routines 113 */ 114 void 115 tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req) 116 { 117 tcp_seq seq, ack; 118 int len, flags; 119 struct tcphdr *th; 120 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 121 122 if (tcp_debx == TCP_NDEBUG) 123 tcp_debx = 0; 124 td->td_time = iptime(); 125 td->td_act = act; 126 td->td_ostate = ostate; 127 td->td_tcb = (void *)tp; 128 if (tp) 129 td->td_cb = *tp; 130 else 131 memset((void *)&td->td_cb, 0, sizeof (*tp)); 132 td->td_family = tp->t_family; 133 memset((void *)&td->td_ti, 0, sizeof (td->td_ti)); 134 #ifdef INET6 135 memset((void *)&td->td_ti6, 0, sizeof (td->td_ti6)); 136 #endif 137 th = NULL; 138 if (m) { 139 struct ip *ip; 140 ip = mtod(m, struct ip *); 141 switch (ip->ip_v) { 142 case 4: 143 if (m->m_len < sizeof(td->td_ti)) 144 break; 145 memcpy(&td->td_ti, mtod(m, void *), sizeof(td->td_ti)); 146 th = (struct tcphdr *)((char *)&td->td_ti + 147 sizeof(struct ip)); 148 break; 149 #ifdef INET6 150 case 6: 151 if (m->m_len < sizeof(td->td_ti6)) 152 break; 153 memcpy(&td->td_ti6, mtod(m, void *), 154 sizeof(td->td_ti6)); 155 th = (struct tcphdr *)((char *)&td->td_ti6 + 156 sizeof(struct ip6_hdr)); 157 break; 158 #endif 159 } 160 } 161 td->td_req = req; 162 if (tcpconsdebug == 0) 163 return; 164 if (tp) 165 printf("%p %s:", tp, tcpstates[ostate]); 166 else 167 printf("???????? "); 168 printf("%s ", tanames[act]); 169 switch (act) { 170 171 case TA_INPUT: 172 case TA_OUTPUT: 173 case TA_DROP: 174 if (th == 0) 175 break; 176 seq = th->th_seq; 177 ack = th->th_ack; 178 len = m->m_pkthdr.len; 179 if (act == TA_OUTPUT) { 180 seq = ntohl(seq); 181 ack = ntohl(ack); 182 len = ntohs((u_int16_t)len); 183 } 184 if (act == TA_OUTPUT) 185 len -= sizeof (struct tcphdr); 186 if (len) 187 printf("[%x..%x)", seq, seq+len); 188 else 189 printf("%x", seq); 190 printf("@%x, urp=%x", ack, th->th_urp); 191 flags = th->th_flags; 192 if (flags) { 193 #ifndef lint 194 const char *cp = "<"; 195 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \ 196 printf("%s%s", cp, "f"); cp = ","; } } 197 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 198 #endif 199 printf(">"); 200 } 201 break; 202 203 case TA_USER: 204 printf("%s", prurequests[req&0xff]); 205 if ((req & 0xff) == PRU_SLOWTIMO) 206 printf("<%s>", tcptimers[req>>8]); 207 break; 208 } 209 if (tp) 210 printf(" -> %s", tcpstates[tp->t_state]); 211 /* print out internal state of tp !?! */ 212 printf("\n"); 213 if (tp == 0) 214 return; 215 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 216 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 217 tp->snd_max); 218 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 219 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 220 } 221
Indexes created Sat Sep 20 22:09:52 GMT 2025