tcp_debug.c revision 1.30.16.2
1 /* $NetBSD: tcp_debug.c,v 1.30.16.2 2018/05/21 04:36:16 pgoyette 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 1.30.16.2 2018/05/21 04:36:16 pgoyette 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 #include <netinet/ip6.h> 95 #endif 96 97 #include <netinet/tcp.h> 98 #include <netinet/tcp_fsm.h> 99 #include <netinet/tcp_seq.h> 100 #include <netinet/tcp_timer.h> 101 #include <netinet/tcp_var.h> 102 #include <netinet/tcp_debug.h> 103 104 struct tcp_debug tcp_debug[TCP_NDEBUG]; 105 int tcp_debx; 106 int tcpconsdebug = 0; 107 /* 108 * Tcp debug routines 109 */ 110 void 111 tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req) 112 { 113 tcp_seq seq, ack; 114 int len, flags; 115 struct tcphdr *th; 116 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 117 118 if (tcp_debx == TCP_NDEBUG) 119 tcp_debx = 0; 120 td->td_time = iptime(); 121 td->td_act = act; 122 td->td_ostate = ostate; 123 td->td_tcb = (void *)tp; 124 if (tp) 125 td->td_cb = *tp; 126 else 127 memset((void *)&td->td_cb, 0, sizeof (*tp)); 128 td->td_family = tp->t_family; 129 memset((void *)&td->td_ti, 0, sizeof (td->td_ti)); 130 #ifdef INET6 131 memset((void *)&td->td_ti6, 0, sizeof (td->td_ti6)); 132 #endif 133 th = NULL; 134 if (m) { 135 struct ip *ip; 136 ip = mtod(m, struct ip *); 137 switch (ip->ip_v) { 138 case 4: 139 if (m->m_len < sizeof(td->td_ti)) 140 break; 141 memcpy(&td->td_ti, mtod(m, void *), sizeof(td->td_ti)); 142 th = (struct tcphdr *)((char *)&td->td_ti + 143 sizeof(struct ip)); 144 break; 145 #ifdef INET6 146 case 6: 147 if (m->m_len < sizeof(td->td_ti6)) 148 break; 149 memcpy(&td->td_ti6, mtod(m, void *), 150 sizeof(td->td_ti6)); 151 th = (struct tcphdr *)((char *)&td->td_ti6 + 152 sizeof(struct ip6_hdr)); 153 break; 154 #endif 155 } 156 } 157 td->td_req = req; 158 if (tcpconsdebug == 0) 159 return; 160 if (tp) 161 printf("%p %s:", tp, tcpstates[ostate]); 162 else 163 printf("???????? "); 164 printf("%s ", tanames[act]); 165 switch (act) { 166 167 case TA_INPUT: 168 case TA_OUTPUT: 169 case TA_DROP: 170 if (th == 0) 171 break; 172 seq = th->th_seq; 173 ack = th->th_ack; 174 len = m->m_pkthdr.len; 175 if (act == TA_OUTPUT) { 176 seq = ntohl(seq); 177 ack = ntohl(ack); 178 len = ntohs((u_int16_t)len); 179 } 180 if (act == TA_OUTPUT) 181 len -= sizeof (struct tcphdr); 182 if (len) 183 printf("[%x..%x)", seq, seq+len); 184 else 185 printf("%x", seq); 186 printf("@%x, urp=%x", ack, th->th_urp); 187 flags = th->th_flags; 188 if (flags) { 189 #ifndef lint 190 const char *cp = "<"; 191 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \ 192 printf("%s%s", cp, "f"); cp = ","; } } 193 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 194 #endif 195 printf(">"); 196 } 197 break; 198 199 case TA_USER: 200 printf("%s", prurequests[req&0xff]); 201 if ((req & 0xff) == PRU_SLOWTIMO) 202 printf("<%s>", tcptimers[req>>8]); 203 break; 204 } 205 if (tp) 206 printf(" -> %s", tcpstates[tp->t_state]); 207 /* print out internal state of tp !?! */ 208 printf("\n"); 209 if (tp == 0) 210 return; 211 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 212 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 213 tp->snd_max); 214 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 215 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 216 } 217
Indexes created Sat Sep 20 22:09:52 GMT 2025