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Annotation of Net2/netinet/tcp_debug.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * 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 7.6 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: #ifdef TCPDEBUG
        !            37: /* load symbolic names */
        !            38: #define PRUREQUESTS
        !            39: #define TCPSTATES
        !            40: #define        TCPTIMERS
        !            41: #define        TANAMES
        !            42: #endif
        !            43: 
        !            44: #include "param.h"
        !            45: #include "systm.h"
        !            46: #include "mbuf.h"
        !            47: #include "socket.h"
        !            48: #include "socketvar.h"
        !            49: #include "protosw.h"
        !            50: #include "errno.h"
        !            51: 
        !            52: #include "../net/route.h"
        !            53: #include "../net/if.h"
        !            54: 
        !            55: #include "in.h"
        !            56: #include "in_systm.h"
        !            57: #include "ip.h"
        !            58: #include "in_pcb.h"
        !            59: #include "ip_var.h"
        !            60: #include "tcp.h"
        !            61: #include "tcp_fsm.h"
        !            62: #include "tcp_seq.h"
        !            63: #include "tcp_timer.h"
        !            64: #include "tcp_var.h"
        !            65: #include "tcpip.h"
        !            66: #include "tcp_debug.h"
        !            67: 
        !            68: #ifdef TCPDEBUG
        !            69: int    tcpconsdebug = 0;
        !            70: #endif
        !            71: /*
        !            72:  * Tcp debug routines
        !            73:  */
        !            74: tcp_trace(act, ostate, tp, ti, req)
        !            75:        short act, ostate;
        !            76:        struct tcpcb *tp;
        !            77:        struct tcpiphdr *ti;
        !            78:        int req;
        !            79: {
        !            80:        tcp_seq seq, ack;
        !            81:        int len, flags;
        !            82:        struct tcp_debug *td = &tcp_debug[tcp_debx++];
        !            83: 
        !            84:        if (tcp_debx == TCP_NDEBUG)
        !            85:                tcp_debx = 0;
        !            86:        td->td_time = iptime();
        !            87:        td->td_act = act;
        !            88:        td->td_ostate = ostate;
        !            89:        td->td_tcb = (caddr_t)tp;
        !            90:        if (tp)
        !            91:                td->td_cb = *tp;
        !            92:        else
        !            93:                bzero((caddr_t)&td->td_cb, sizeof (*tp));
        !            94:        if (ti)
        !            95:                td->td_ti = *ti;
        !            96:        else
        !            97:                bzero((caddr_t)&td->td_ti, sizeof (*ti));
        !            98:        td->td_req = req;
        !            99: #ifdef TCPDEBUG
        !           100:        if (tcpconsdebug == 0)
        !           101:                return;
        !           102:        if (tp)
        !           103:                printf("%x %s:", tp, tcpstates[ostate]);
        !           104:        else
        !           105:                printf("???????? ");
        !           106:        printf("%s ", tanames[act]);
        !           107:        switch (act) {
        !           108: 
        !           109:        case TA_INPUT:
        !           110:        case TA_OUTPUT:
        !           111:        case TA_DROP:
        !           112:                if (ti == 0)
        !           113:                        break;
        !           114:                seq = ti->ti_seq;
        !           115:                ack = ti->ti_ack;
        !           116:                len = ti->ti_len;
        !           117:                if (act == TA_OUTPUT) {
        !           118:                        seq = ntohl(seq);
        !           119:                        ack = ntohl(ack);
        !           120:                        len = ntohs((u_short)len);
        !           121:                }
        !           122:                if (act == TA_OUTPUT)
        !           123:                        len -= sizeof (struct tcphdr);
        !           124:                if (len)
        !           125:                        printf("[%x..%x)", seq, seq+len);
        !           126:                else
        !           127:                        printf("%x", seq);
        !           128:                printf("@%x, urp=%x", ack, ti->ti_urp);
        !           129:                flags = ti->ti_flags;
        !           130:                if (flags) {
        !           131: #ifndef lint
        !           132:                        char *cp = "<";
        !           133: #define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
        !           134:                        pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
        !           135: #endif
        !           136:                        printf(">");
        !           137:                }
        !           138:                break;
        !           139: 
        !           140:        case TA_USER:
        !           141:                printf("%s", prurequests[req&0xff]);
        !           142:                if ((req & 0xff) == PRU_SLOWTIMO)
        !           143:                        printf("<%s>", tcptimers[req>>8]);
        !           144:                break;
        !           145:        }
        !           146:        if (tp)
        !           147:                printf(" -> %s", tcpstates[tp->t_state]);
        !           148:        /* print out internal state of tp !?! */
        !           149:        printf("\n");
        !           150:        if (tp == 0)
        !           151:                return;
        !           152:        printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
        !           153:            tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
        !           154:            tp->snd_max);
        !           155:        printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
        !           156:            tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
        !           157: #endif /* TCPDEBUG */
        !           158: }

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