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hosts2zones.c
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hosts2zones.c
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// hosts2zones.c
// hosts2zones
//
// Created by Dr. Rolf Jansen on 2014-07-06.
// Copyright (c) 2014 projectworld.net. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <sys/stat.h>
#include "binutils.h"
#include "store.h"
#define hcnt 65535
int hosts_count = 0;
int zones_count = 0;
FILE *in, *out;
Node **domainStore;
void zoneOutput(Node *node)
{
if (node)
{
zoneOutput(node->L);
zoneOutput(node->R);
bool ontop = true;
int n, level = 0;
char *q, *p = node->name;
for (q = p + node->naml, n = 0; ontop && q > p; q--, n++)
if (*q && *(q-1) == '.' && (++level >= 3 || level == 2 && n > 6) && findName(domainStore, q, n))
ontop = false;
if (ontop && level && !node->value.b)
{
fprintf(out, "local-zone: \"%s\" static\n", node->name);
zones_count++;
}
}
}
int main(int argc, const char *argv[])
{
if (argc >= 3 && (out = fopen(argv[1], "w")))
{
domainStore = createTable(hcnt);
int inc;
struct stat st;
for (inc = 2; inc < argc; inc++)
if (stat(argv[inc], &st) == noerr && st.st_size > 3 && (in = fopen(argv[inc], "r")))
{
char *hosts = allocate(st.st_size + 2, false);
if (fread(hosts, st.st_size, 1, in) == 1)
{
cpy2(&hosts[st.st_size], "\n"); // guaranteed end of line + end of string at the end of the read-in data
bool iswhite;
int dl, ll, wl;
char *word, *lineend, *nextword, *nextline;
char *line = hosts + blanklen(hosts); // get the start of the first line by skipping leading blanks + blank lines
while (line < hosts + st.st_size)
{
ll = linelen(line);
lineend = bskip(line+ll); // skip trailing blanks
*lineend = '\0'; // separate the entry as string
nextline = line + ll+1; // get the start of the next line
nextline += blanklen(nextline); // by skipping leading blanks + blank lines
if (*line != '#') // skip comment lines
{
word = NULL; // assume an inacceptable entry
line[wl = wordlen(line)] = '\0'; // pickup the first entry on the line
if (line+wl == lineend && // accept a single domain name per line which
0 < (dl = domainlen(line)) && dl < wl) // must contain at least 1 non-leading & non-trailing dot
word = line, iswhite = false; // simple domain lists are always black lists
// otherwise assume the Hosts file format
else if ((iswhite = cmp8(line, "1.1.1.1")) || // entries starting with 1.1.1.1 shall be white listed
/*isblack*/ cmp8(line, "0.0.0.0") || // 0.0.0.0 or 127.0.0.1 are black list entries
/*isblack*/ cmp10(line, "127.0.0.1") && (line+=2))
word = line + 8, word += blanklen(word); // skip IP address and leading blanks
if (word) // only process simple domain entries or entries in Hosts file format
while (*word && *word != '#' && word < nextline) // Hosts files may contain more than one domain per line
{
wl = wordlen(word);
nextword = word + wl;
*nextword++ = '\0';
nextword += blanklen(nextword);
if (*lowercase(word, wl) &&
!cmp10(word, "localhost") && // don't process 'localhost' entries
!findName(domainStore, word, wl)) // if the entry does not exit in the domain store
{ // then create a new one for the given domain name
Value value = {Simple, .b = iswhite};
storeName(domainStore, word, wl, &value);
hosts_count++;
}
word = nextword;
}
}
line = nextline;
}
}
deallocate(VPR(hosts), false);
fclose(in);
}
for (size_t h = 1; h <= hcnt; h++)
zoneOutput(domainStore[h]);
releaseTable(domainStore);
fclose(out);
printf("Number of Hosts: %d\nNumber of Zones: %d\n", hosts_count, zones_count);
return (zones_count > 0) ? 0 : 1;
}
else
return 1;
}