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Annotation of 43BSDReno/sys/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 is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)tcp_debug.c 7.6 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: #ifdef TCPDEBUG
        !            24: /* load symbolic names */
        !            25: #define PRUREQUESTS
        !            26: #define TCPSTATES
        !            27: #define        TCPTIMERS
        !            28: #define        TANAMES
        !            29: #endif
        !            30: 
        !            31: #include "param.h"
        !            32: #include "systm.h"
        !            33: #include "mbuf.h"
        !            34: #include "socket.h"
        !            35: #include "socketvar.h"
        !            36: #include "protosw.h"
        !            37: #include "errno.h"
        !            38: 
        !            39: #include "../net/route.h"
        !            40: #include "../net/if.h"
        !            41: 
        !            42: #include "in.h"
        !            43: #include "in_systm.h"
        !            44: #include "ip.h"
        !            45: #include "in_pcb.h"
        !            46: #include "ip_var.h"
        !            47: #include "tcp.h"
        !            48: #include "tcp_fsm.h"
        !            49: #include "tcp_seq.h"
        !            50: #include "tcp_timer.h"
        !            51: #include "tcp_var.h"
        !            52: #include "tcpip.h"
        !            53: #include "tcp_debug.h"
        !            54: 
        !            55: #ifdef TCPDEBUG
        !            56: int    tcpconsdebug = 0;
        !            57: #endif
        !            58: /*
        !            59:  * Tcp debug routines
        !            60:  */
        !            61: tcp_trace(act, ostate, tp, ti, req)
        !            62:        short act, ostate;
        !            63:        struct tcpcb *tp;
        !            64:        struct tcpiphdr *ti;
        !            65:        int req;
        !            66: {
        !            67:        tcp_seq seq, ack;
        !            68:        int len, flags;
        !            69:        struct tcp_debug *td = &tcp_debug[tcp_debx++];
        !            70: 
        !            71:        if (tcp_debx == TCP_NDEBUG)
        !            72:                tcp_debx = 0;
        !            73:        td->td_time = iptime();
        !            74:        td->td_act = act;
        !            75:        td->td_ostate = ostate;
        !            76:        td->td_tcb = (caddr_t)tp;
        !            77:        if (tp)
        !            78:                td->td_cb = *tp;
        !            79:        else
        !            80:                bzero((caddr_t)&td->td_cb, sizeof (*tp));
        !            81:        if (ti)
        !            82:                td->td_ti = *ti;
        !            83:        else
        !            84:                bzero((caddr_t)&td->td_ti, sizeof (*ti));
        !            85:        td->td_req = req;
        !            86: #ifdef TCPDEBUG
        !            87:        if (tcpconsdebug == 0)
        !            88:                return;
        !            89:        if (tp)
        !            90:                printf("%x %s:", tp, tcpstates[ostate]);
        !            91:        else
        !            92:                printf("???????? ");
        !            93:        printf("%s ", tanames[act]);
        !            94:        switch (act) {
        !            95: 
        !            96:        case TA_INPUT:
        !            97:        case TA_OUTPUT:
        !            98:        case TA_DROP:
        !            99:                if (ti == 0)
        !           100:                        break;
        !           101:                seq = ti->ti_seq;
        !           102:                ack = ti->ti_ack;
        !           103:                len = ti->ti_len;
        !           104:                if (act == TA_OUTPUT) {
        !           105:                        seq = ntohl(seq);
        !           106:                        ack = ntohl(ack);
        !           107:                        len = ntohs((u_short)len);
        !           108:                }
        !           109:                if (act == TA_OUTPUT)
        !           110:                        len -= sizeof (struct tcphdr);
        !           111:                if (len)
        !           112:                        printf("[%x..%x)", seq, seq+len);
        !           113:                else
        !           114:                        printf("%x", seq);
        !           115:                printf("@%x, urp=%x", ack, ti->ti_urp);
        !           116:                flags = ti->ti_flags;
        !           117:                if (flags) {
        !           118: #ifndef lint
        !           119:                        char *cp = "<";
        !           120: #define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
        !           121:                        pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
        !           122: #endif
        !           123:                        printf(">");
        !           124:                }
        !           125:                break;
        !           126: 
        !           127:        case TA_USER:
        !           128:                printf("%s", prurequests[req&0xff]);
        !           129:                if ((req & 0xff) == PRU_SLOWTIMO)
        !           130:                        printf("<%s>", tcptimers[req>>8]);
        !           131:                break;
        !           132:        }
        !           133:        if (tp)
        !           134:                printf(" -> %s", tcpstates[tp->t_state]);
        !           135:        /* print out internal state of tp !?! */
        !           136:        printf("\n");
        !           137:        if (tp == 0)
        !           138:                return;
        !           139:        printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
        !           140:            tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
        !           141:            tp->snd_max);
        !           142:        printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
        !           143:            tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
        !           144: #endif /* TCPDEBUG */
        !           145: }

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