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/*
* COPYRIGHT AND DISCLAIMER
*
* Copyright (C) 1996-1997 by the Regents of the University of California.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
* EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE IS
* PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO
* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
* MODIFICATIONS.
*
* For inquiries email Steve Gribble <gribble@cs.berkeley.edu>.
*/
/*
* Author: Steve Gribble
* Date: Nov. 23rd, 1996
* File: logparse.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <errno.h>
#include "logparse.h"
#include "utils.h"
// extern int errno; // -- this should come from errno.h
/**
** lf_get_next_entry will suck the next record out of the logfile, and
** return a lf_entry record witih the information stuffed into it. Note
** that memory WILL be allocated for the url field; the caller is
** responsible for freeing the memory when done. The logfile should have
** everything stored in network order, if all is well.
**
** This function returns 0 on success, 1 for EOF, and something else
** otherwise. On failure,
** no memory will have been allocated.
**/
int lf_get_next_entry(int logfile_fd, lf_entry *nextentry, int vers)
{
unsigned char blockbuf[60], *tmp;
int uln, ret;
if ((ret = correct_read(logfile_fd, (char *)blockbuf, (size_t) 60)) != 60) {
if (ret == 0)
return 1;
/* fprintf(stderr, "read 60 failed...%d\n", ret); */
return 2;
}
/* We got one! */
nextentry->version = vers;
memcpy( &(nextentry->crs), blockbuf+0, 4);
memcpy( &(nextentry->cru), blockbuf+4, 4);
memcpy( &(nextentry->srs), blockbuf+8, 4);
memcpy( &(nextentry->sru), blockbuf+12, 4);
memcpy( &(nextentry->sls), blockbuf+16, 4);
memcpy( &(nextentry->slu), blockbuf+20, 4);
memcpy( &(nextentry->cip), blockbuf+24, 4);
memcpy( &(nextentry->cpt), blockbuf+28, 2);
memcpy( &(nextentry->sip), blockbuf+30, 4);
memcpy( &(nextentry->spt), blockbuf+34, 2);
memcpy( &(nextentry->cprg), blockbuf+36, 1);
memcpy( &(nextentry->sprg), blockbuf+37, 1);
memcpy( &(nextentry->cims), blockbuf+38, 4);
memcpy( &(nextentry->sexp), blockbuf+42, 4);
memcpy( &(nextentry->slmd), blockbuf+46, 4);
memcpy( &(nextentry->rhl), blockbuf+50, 4);
memcpy( &(nextentry->rdl), blockbuf+54, 4);
memcpy( &(nextentry->urllen), blockbuf+58, 2);
/* Now let's read in that url */
uln = ntohs(nextentry->urllen);
nextentry->url = (unsigned char *) malloc(sizeof(char) *
(int) (uln + 1));
if (nextentry->url == NULL) {
fprintf(stderr, "out of memory in lf_get_next_netry!\n");
exit(1);
}
if ((ret = correct_read(logfile_fd, (char *) (nextentry->url), (size_t) uln))
!= uln ) {
if (ret == 0) {
free(nextentry->url);
return 1;
}
fprintf(stderr, "read of %d failed %d\n", uln, ret);
perror("aargh.");
free(nextentry->url);
return 2;
}
tmp = nextentry->url;
*(tmp + uln) = '\0';
return 0;
}
/**
** This function will convert all of the entries in the record into/from
** host order. This function is its own inverse. This function cannot
** fail.
**/
void lf_convert_order(lf_entry *convertme)
{
convertme->crs = ntohl(convertme->crs);
convertme->cru = ntohl(convertme->cru);
convertme->srs = ntohl(convertme->srs);
convertme->sru = ntohl(convertme->sru);
convertme->sls = ntohl(convertme->sls);
convertme->slu = ntohl(convertme->slu);
convertme->cip = ntohl(convertme->cip);
convertme->cpt = ntohs(convertme->cpt);
convertme->sip = ntohl(convertme->sip);
convertme->spt = ntohs(convertme->spt);
convertme->cims = ntohl(convertme->cims);
convertme->sexp = ntohl(convertme->sexp);
convertme->slmd = ntohl(convertme->slmd);
convertme->rhl = ntohl(convertme->rhl);
convertme->rdl = ntohl(convertme->rdl);
convertme->urllen = ntohs(convertme->urllen);
}
/**
** This function will write the entry pointed to by writeme back
** out to the file outf, in the canonical logfile binary format.
** It returns 0 on success, something else on failure.
**/
int lf_write(FILE *outf, lf_entry *writeme)
{
unsigned char blockbuf[60];
int uln, ret;
memcpy( blockbuf+0, &(writeme->crs), 4);
memcpy( blockbuf+4, &(writeme->cru), 4);
memcpy( blockbuf+8, &(writeme->srs), 4);
memcpy( blockbuf+12, &(writeme->sru), 4);
memcpy( blockbuf+16, &(writeme->sls), 4);
memcpy( blockbuf+20, &(writeme->slu), 4);
memcpy( blockbuf+24, &(writeme->cip), 4);
memcpy( blockbuf+28, &(writeme->cpt), 2);
memcpy( blockbuf+30, &(writeme->sip), 4);
memcpy( blockbuf+34, &(writeme->spt), 2);
memcpy( blockbuf+36, &(writeme->cprg), 1);
memcpy( blockbuf+37, &(writeme->sprg), 1);
memcpy( blockbuf+38, &(writeme->cims), 4);
memcpy( blockbuf+42, &(writeme->sexp), 4);
memcpy( blockbuf+46, &(writeme->slmd), 4);
memcpy( blockbuf+50, &(writeme->rhl), 4);
memcpy( blockbuf+54, &(writeme->rdl), 4);
memcpy( blockbuf+58, &(writeme->urllen), 2);
ret = fwrite(&(blockbuf[0]), 60, 1, outf);
if (ret != 1) {
fprintf(stderr, "write 60 failed...%d\n", ret);
perror("arrgh1");
return 1;
}
/* Now let's write out that url */
uln = ntohs(writeme->urllen);
ret = fwrite(writeme->url, (size_t) uln, 1, outf);
if (ret != 1) {
fprintf(stderr, "write of %d failed %d\n", uln, ret);
perror("aargh.");
return 2;
}
return 0;
}
/**
** This function will dump a human-readable output version of the record
** to the passed-in file pointer. Assume that the record is in NETWORK
** order. Nothing can possibly go wrong. :)
**/
void lf_dump(FILE *dumpf, lf_entry *dumpme)
{
char addr1buf[128], addr2buf[128];
lf_convert_order(dumpme);
lf_ntoa(dumpme->cip, addr1buf);
lf_ntoa(dumpme->sip, addr2buf);
fprintf(dumpf, "%lu:%lu %lu:%lu %lu:%lu %s:%hu %s:%hu %u %u ",
dumpme->crs, dumpme->cru, dumpme->srs, dumpme->sru,
dumpme->sls, dumpme->slu, addr1buf, dumpme->cpt,
addr2buf, dumpme->spt, dumpme->cprg, dumpme->sprg);
fprintf(dumpf, "%lu %lu %lu %lu %lu %u %s\n",
dumpme->cims, dumpme->sexp, dumpme->slmd, dumpme->rhl,
dumpme->rdl, dumpme->urllen, dumpme->url);
lf_convert_order(dumpme);
}
/**
** lf_ntoa takes a network IP address (in host order) and converts it
** to an ascii representation. addrbuf had better be 16 bytes or
** more...
**/
void lf_ntoa(unsigned long addr, char *addrbuf)
{
sprintf(addrbuf, "%lu.%lu.%lu.%lu",
(addr >> 24),
(addr >> 16) % 256,
(addr >> 8) % 256,
(addr) % 256);
}
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