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#include "strerr.h"
#include "stralloc.h"
#include "getln.h"
#include "buffer.h"
#include "exit.h"
#include "fmt.h"
#include "byte.h"
#include "cdb_make.h"
#define FATAL "tcprules: fatal: "
unsigned long linenum = 0;
char *fntemp;
char *fn;
stralloc line = {0};
int match = 1;
stralloc address = {0};
stralloc data = {0};
stralloc key = {0};
struct cdb_make c;
void nomem(void)
{
strerr_die2x(111,FATAL,"out of memory");
}
void usage(void)
{
strerr_die1x(100,"tcprules: usage: tcprules rules.cdb rules.tmp");
}
void die_bad(void)
{
if (!stralloc_0(&line)) nomem();
strerr_die3x(100,FATAL,"unable to parse this line: ",line.s);
}
void die_write(void)
{
strerr_die4sys(111,FATAL,"unable to write to ",fntemp,": ");
}
char strnum[FMT_ULONG];
stralloc sanum = {0};
void getnum(char *buf,int len,unsigned long *u)
{
if (!stralloc_copyb(&sanum,buf,len)) nomem();
if (!stralloc_0(&sanum)) nomem();
if (sanum.s[scan_ulong(sanum.s,u)]) die_bad();
}
void doaddressdata(void)
{
int i;
int left;
int right;
unsigned long bot;
unsigned long top;
if (byte_chr(address.s,address.len,'=') == address.len)
if (byte_chr(address.s,address.len,'@') == address.len) {
i = byte_chr(address.s,address.len,'-');
if (i < address.len) {
left = byte_rchr(address.s,i,'.');
if (left == i) left = 0; else ++left;
++i;
right = i + byte_chr(address.s + i,address.len - i,'.');
getnum(address.s + left,i - 1 - left,&bot);
getnum(address.s + i,right - i,&top);
if (top > 255) top = 255;
while (bot <= top) {
if (!stralloc_copyb(&key,address.s,left)) nomem();
if (!stralloc_catb(&key,strnum,fmt_ulong(strnum,bot))) nomem();
if (!stralloc_catb(&key,address.s + right,address.len - right)) nomem();
if (cdb_make_add(&c,key.s,key.len,data.s,data.len) == -1) die_write();
++bot;
}
return;
}
}
if (cdb_make_add(&c,address.s,address.len,data.s,data.len) == -1) die_write();
}
main(int argc,char **argv)
{
int colon;
char *x;
int len;
int fd;
int i;
char ch;
fn = argv[1];
if (!fn) usage();
fntemp = argv[2];
if (!fntemp) usage();
fd = open_trunc(fntemp);
if (fd == -1)
strerr_die4sys(111,FATAL,"unable to create ",fntemp,": ");
if (cdb_make_start(&c,fd) == -1) die_write();
while (match) {
if (getln(buffer_0,&line,&match,'\n') == -1)
strerr_die2sys(111,FATAL,"unable to read input: ");
x = line.s; len = line.len;
if (!len) break;
if (x[0] == '#') continue;
if (x[0] == '\n') continue;
while (len) {
ch = x[len - 1];
if (ch != '\n') if (ch != ' ') if (ch != '\t') break;
--len;
}
line.len = len; /* for die_bad() */
colon = 0;
for (;;) {
int tmp;
tmp = byte_chr(x + colon,len - colon,':');
colon += tmp;
if (colon == len) continue;
if (byte_equal(x+colon+1,4,"deny") || byte_equal(x+colon+1,5,"allow")) break;
++colon;
}
if (!stralloc_copyb(&address,x,colon)) nomem();
if (!stralloc_copys(&data,"")) nomem();
x += colon + 1; len -= colon + 1;
if ((len >= 4) && byte_equal(x,4,"deny")) {
if (!stralloc_catb(&data,"D",2)) nomem();
x += 4; len -= 4;
}
else if ((len >= 5) && byte_equal(x,5,"allow")) {
x += 5; len -= 5;
}
else
die_bad();
while (len)
switch(*x) {
case ',':
i = byte_chr(x,len,'=');
if (i == len) die_bad();
if (!stralloc_catb(&data,"+",1)) nomem();
if (!stralloc_catb(&data,x + 1,i)) nomem();
x += i + 1; len -= i + 1;
if (!len) die_bad();
ch = *x;
x += 1; len -= 1;
i = byte_chr(x,len,ch);
if (i == len) die_bad();
if (!stralloc_catb(&data,x,i)) nomem();
if (!stralloc_0(&data)) nomem();
x += i + 1; len -= i + 1;
break;
default:
die_bad();
}
doaddressdata();
}
if (cdb_make_finish(&c) == -1) die_write();
if (fsync(fd) == -1) die_write();
if (close(fd) == -1) die_write(); /* NFS stupidity */
if (rename(fntemp,fn))
strerr_die6sys(111,FATAL,"unable to move ",fntemp," to ",fn,": ");
_exit(0);
}
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