static void addflag(const char *var, const char* flag, int reset)
{
if(!session_getnum(var, 0)) return;
if(reset) session_delnum(var);
if(mflags.len) str_cats(&mflags, ",");
str_cats(&mflags, flag);
}
static const response* apply_rule(const struct rule* rule)
{
const response* resp;
unsigned long maxdatabytes;
resp = build_response(rule->code, &rule->response);
apply_environment(&rule->environment);
maxdatabytes = session_getnum("maxdatabytes", ~0UL);
if (maxdatabytes == 0
|| (rule->databytes > 0
&& maxdatabytes > rule->databytes))
session_setnum("maxdatabytes", rule->databytes);
return resp;
}
static int dblchk(str *domain, str *dbltxt)
{
str dblstr;
char *dbl = getenv("DBLLOOKUP");
int l, i;
unsigned char ansbuf[512];
if(!dbl || domain->len == 0) return 0;
if(session_getnum("sump",0)) return 0; /* no point */
str_init(&dblstr);
str_copy(&dblstr, domain);
str_catc(&dblstr, '.');
str_cats(&dblstr, dbl);
l = res_query(dblstr.s, C_IN, T_TXT, ansbuf, sizeof(ansbuf));
if(l > 0 && ((HEADER *)ansbuf)->ancount != 0) { /* something in the answer */
unsigned char *recbuf = ansbuf+NS_HFIXEDSZ;
/* skip over questions, why am I still writing stuff
* like this? */
for(i = ns_get16(ansbuf+4); i != 0; --i)
recbuf += dn_skipname(recbuf, ansbuf+l)+4;
for(i = ns_get16(ansbuf+6); i != 0; --i) {
recbuf += dn_skipname(recbuf, ansbuf+l);
if(ns_get16(recbuf) != T_TXT) { /* CNAME or something */
recbuf += 10 + ns_get16(recbuf+8);
continue;
}
/* it's a TXT record, wow */
str_init(dbltxt);
str_copyb(dbltxt, (char*)recbuf+11, recbuf[10]);
str_free(&dblstr);
return 1;
}
} /* didn't find anything */
str_free(&dblstr);
return 0;
}