Internet Info 1994 March/Internet Info CD-ROM (Walnut Creek) (March 1994).iso/networking/ip/ka9q/net_src.arc/trace.c

C/C++ Source or Header | 1989-05-08 | 4.7 KB | 233 lines

#include <stdio.h>
#include <ctype.h>
#include "global.h"
#include "config.h"
#include "mbuf.h"
#include "iface.h"
#include "trace.h"
#include "session.h"

/* Redefined here so that programs calling dump in the library won't pull
 * in the rest of the package
 */
static char nospace[] = "No space!!\n";
static char nullpak[] = "empty packet!!\n";
static char if_tr_i[] = "%s recv: [%s]\n";
static char if_tr_o[] = "%s sent: [%s]\n";

FILE *trfp = stdout;            /* file pointer used for tracing */
int trcount = 0;                /* used to close file for flushing */
char trname[40];                /* name if not stdout */
int notraceall;            /* 0 = trace all, 1 = only in cmd mode */
extern int mode;        /* command mode or not */

dump(interface,direction,type,bp)
register struct interface *interface;
int direction;
unsigned type;
struct mbuf *bp;
{
    struct mbuf *tbp;
    void ascii_dump(),hex_dump();
    int ax25_dump(),ether_dump(),ip_dump(),at_dump(),slfp_dump();
    int (*func)();
    char *cp;
    long t;
    int16 size;

    if((interface->trace & direction) == 0)
        return;    /* Nothing to trace */

    if (notraceall && mode != CMD_MODE)
        return; /* No trace while in session, if mode */

    if(bp == NULLBUF || (size = len_mbuf(bp)) == 0)
        return;

#ifdef SCREEN
    (void)outscreen(1);        /* DG2KK: switch to trace screen */
#endif
    time(&t);            /* DG2KK: get time */
    cp = ctime(&t);
    rip(cp);

    switch(direction){
    case IF_TRACE_IN:
        fprintf(trfp,if_tr_i,interface->name,cp);
        break;
    case IF_TRACE_OUT:
        fprintf(trfp,if_tr_o,interface->name,cp);
        break;
    }
    if(bp == NULLBUF || (size = len_mbuf(bp)) == 0){
        fprintf(trfp,nullpak);
        goto trdone;
    }
    if(type < NTRACE)
        func = tracef[type];
    else
        func = NULLFP;

    dup_p(&tbp,bp,0,size);
    if(tbp == NULLBUF){
        fprintf(trfp,nospace);
        if (trfp != stdout)
          printf(nospace);
        goto trdone;
    }
    if(func != NULLFP)
        (*func)(&tbp,1);
    if(interface->trace & IF_TRACE_ASCII){
        /* Dump only data portion of packet in ascii */
        ascii_dump(&tbp);
    } else if(interface->trace & IF_TRACE_HEX){
        /* Dump entire packet in hex/ascii */
        free_p(tbp);
        dup_p(&tbp,bp,0,len_mbuf(bp));
        if(tbp != NULLBUF)
            hex_dump(&tbp);
        else {
            fprintf(trfp,nospace);
            if (trfp != stdout)
              printf(nospace);
            }
    }
    free_p(tbp);

#ifdef SCREEN
    (void)outscreen(0);        /* switch back to main screen */
#endif

      trdone:
    if(trfp != stdout) {
#ifndef ATARI_ST
      fflush(trfp);
#endif
#if (defined(MSDOS) || defined(ATARI_ST))
      if (++trcount > 25) {
        fclose(trfp);
        trfp = fopen(trname,"a");
        trcount = 0;
      }
#endif
      if (trfp == NULLFILE || ferror(trfp)) {
        printf("Error on %s - trace to console\n",trname);
        if (trfp != NULLFILE && trfp != stdout)
          fclose(trfp);
        trfp = stdout;
      }
    }
    fflush(stdout);
}

/* Dump an mbuf in hex */
void
hex_dump(bpp)
register struct mbuf **bpp;
{
    int16 n;
    int16 address;
    void fmtline();
    char buf[16];

    if(bpp == NULLBUFP || *bpp == NULLBUF)
        return;

    address = 0;
    while((n = pullup(bpp,buf,sizeof(buf))) != 0){
        fmtline(address,buf,n);
        address += n;
    }
}
/* Dump an mbuf in ascii */
void
ascii_dump(bpp)
register struct mbuf **bpp;
{
    char c;
    register int16 tot;

    if(bpp == NULLBUFP || *bpp == NULLBUF)
        return;

    tot = 0;
    while(pullup(bpp,&c,1) == 1){
        if((tot % 64) == 0) {
            fprintf(trfp,"%04x  ",tot);
        }
#ifdef PC9801
        if ((c >= 0x20) || (c < 0)) {
#else
        if(isprint(c)) {
#endif
            putchar(c);
        } else {
            putchar('.');
        }
        tot++;
        if((tot % 64) == 0) {
#ifdef PC9801
            fprintf(trfp," \n");
#else
            fprintf(trfp,"\n");
#endif
        }
    }
    if((tot % 64) != 0) {
#ifdef PC9801
        fprintf(trfp," \n");
#else
        fprintf(trfp,"\n");
#endif
    }
}

/* Print a buffer up to 16 bytes long in formatted hex with ascii
 * translation, e.g.,
 * 0000: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f  0123456789:;<=>?
 */
void
fmtline(addr,buf,len)
int16 addr;
char *buf;
int16 len;
{
    char line[80];
    register char *aptr,*cptr;
    register int16 c;
    void ctohex();

    memset(line,' ',sizeof(line));
    ctohex(line,(int16)hibyte(addr));
    ctohex(line+2,(int16)lobyte(addr));
    aptr = &line[6];
    cptr = &line[55];
    while(len-- != 0){
        c = *buf++ & 0xff;
        ctohex(aptr,c);
        aptr += 3;
        c &= 0x7f;
        *cptr++ = isprint(c) ? c : '.';
    }
#ifdef PC9801
    *cptr++ = ' ';
#endif
    *cptr++ = '\r';
    *cptr++ = '\n';
    fwrite(line,1,(unsigned)(cptr-line),stdout);
    /* added */
}
/* Convert byte to two ascii-hex characters */
static
void
ctohex(buf,c)
register char *buf;
register int16 c;
{
    static char hex[] = "0123456789abcdef";

    buf[0] = hex[hinibble(c)];
    buf[1] = hex[lonibble(c)];
}