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Annotation of XNU/bsd/netinet/tcp_debug.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1982, 1986, 1993
        !            24:  *     The Regents of the University of California.  All rights reserved.
        !            25:  *
        !            26:  * Redistribution and use in source and binary forms, with or without
        !            27:  * modification, are permitted provided that the following conditions
        !            28:  * are met:
        !            29:  * 1. Redistributions of source code must retain the above copyright
        !            30:  *    notice, this list of conditions and the following disclaimer.
        !            31:  * 2. Redistributions in binary form must reproduce the above copyright
        !            32:  *    notice, this list of conditions and the following disclaimer in the
        !            33:  *    documentation and/or other materials provided with the distribution.
        !            34:  * 3. All advertising materials mentioning features or use of this software
        !            35:  *    must display the following acknowledgement:
        !            36:  *     This product includes software developed by the University of
        !            37:  *     California, Berkeley and its contributors.
        !            38:  * 4. Neither the name of the University nor the names of its contributors
        !            39:  *    may be used to endorse or promote products derived from this software
        !            40:  *    without specific prior written permission.
        !            41:  *
        !            42:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            43:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            44:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            45:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            46:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            47:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            48:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            49:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            50:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            51:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            52:  * SUCH DAMAGE.
        !            53:  *
        !            54:  *     @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
        !            55:  */
        !            56: 
        !            57: #if ISFB31
        !            58: #include "opt_inet.h"
        !            59: #include "opt_tcpdebug.h"
        !            60: #endif
        !            61: 
        !            62: #ifndef INET
        !            63: #error The option TCPDEBUG requires option INET.
        !            64: #endif
        !            65: 
        !            66: #if TCPDEBUG
        !            67: /* load symbolic names */
        !            68: #define PRUREQUESTS
        !            69: #define TCPSTATES
        !            70: #define        TCPTIMERS
        !            71: #define        TANAMES
        !            72: #endif
        !            73: 
        !            74: #include <sys/param.h>
        !            75: #include <sys/systm.h>
        !            76: #include <sys/protosw.h>
        !            77: 
        !            78: #include <netinet/in.h>
        !            79: #include <netinet/in_systm.h>
        !            80: #include <netinet/ip_var.h>
        !            81: #include <netinet/tcp.h>
        !            82: #include <netinet/tcp_fsm.h>
        !            83: #include <netinet/tcp_timer.h>
        !            84: #include <netinet/tcp_var.h>
        !            85: #include <netinet/tcpip.h>
        !            86: #include <netinet/tcp_debug.h>
        !            87: 
        !            88: #if TCPDEBUG
        !            89: static int     tcpconsdebug = 0;
        !            90: #endif
        !            91: 
        !            92: static struct tcp_debug tcp_debug[TCP_NDEBUG];
        !            93: static int     tcp_debx;
        !            94: 
        !            95: /*
        !            96:  * Tcp debug routines
        !            97:  */
        !            98: void
        !            99: tcp_trace(act, ostate, tp, ti, req)
        !           100:        short act, ostate;
        !           101:        struct tcpcb *tp;
        !           102:        struct tcpiphdr *ti;
        !           103:        int req;
        !           104: {
        !           105:        tcp_seq seq, ack;
        !           106:        int len, flags;
        !           107:        struct tcp_debug *td = &tcp_debug[tcp_debx++];
        !           108: 
        !           109:        if (tcp_debx == TCP_NDEBUG)
        !           110:                tcp_debx = 0;
        !           111:        td->td_time = iptime();
        !           112:        td->td_act = act;
        !           113:        td->td_ostate = ostate;
        !           114:        td->td_tcb = (caddr_t)tp;
        !           115:        if (tp)
        !           116:                td->td_cb = *tp;
        !           117:        else
        !           118:                bzero((caddr_t)&td->td_cb, sizeof (*tp));
        !           119:        if (ti)
        !           120:                td->td_ti = *ti;
        !           121:        else
        !           122:                bzero((caddr_t)&td->td_ti, sizeof (*ti));
        !           123:        td->td_req = req;
        !           124: #if TCPDEBUG
        !           125:        if (tcpconsdebug == 0)
        !           126:                return;
        !           127:        if (tp)
        !           128:                printf("%p %s:", tp, tcpstates[ostate]);
        !           129:        else
        !           130:                printf("???????? ");
        !           131:        printf("%s ", tanames[act]);
        !           132:        switch (act) {
        !           133: 
        !           134:        case TA_INPUT:
        !           135:        case TA_OUTPUT:
        !           136:        case TA_DROP:
        !           137:                if (ti == 0)
        !           138:                        break;
        !           139:                seq = ti->ti_seq;
        !           140:                ack = ti->ti_ack;
        !           141:                len = ti->ti_len;
        !           142:                if (act == TA_OUTPUT) {
        !           143:                        seq = ntohl(seq);
        !           144:                        ack = ntohl(ack);
        !           145:                        len = ntohs((u_short)len);
        !           146:                }
        !           147:                if (act == TA_OUTPUT)
        !           148:                        len -= sizeof (struct tcphdr);
        !           149:                if (len)
        !           150:                        printf("[%x..%x)", seq, seq+len);
        !           151:                else
        !           152:                        printf("%x", seq);
        !           153:                printf("@%x, urp=%x", ack, ti->ti_urp);
        !           154:                flags = ti->ti_flags;
        !           155:                if (flags) {
        !           156:                        char *cp = "<";
        !           157: #define pf(f) {                                        \
        !           158:        if (ti->ti_flags & TH_##f) {            \
        !           159:                printf("%s%s", cp, #f);         \
        !           160:                cp = ",";                       \
        !           161:        }                                       \
        !           162: }
        !           163:                        pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
        !           164:                        printf(">");
        !           165:                }
        !           166:                break;
        !           167: 
        !           168:        case TA_USER:
        !           169:                printf("%s", prurequests[req&0xff]);
        !           170:                if ((req & 0xff) == PRU_SLOWTIMO)
        !           171:                        printf("<%s>", tcptimers[req>>8]);
        !           172:                break;
        !           173:        }
        !           174:        if (tp)
        !           175:                printf(" -> %s", tcpstates[tp->t_state]);
        !           176:        /* print out internal state of tp !?! */
        !           177:        printf("\n");
        !           178:        if (tp == 0)
        !           179:                return;
        !           180:        printf(
        !           181:        "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n",
        !           182:            (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up,
        !           183:            (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max);
        !           184:        printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n",
        !           185:            (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd);
        !           186: #endif /* TCPDEBUG */
        !           187: }

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