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;
}
/* rule application ******************************************************** */
static int matches(const struct pattern* pattern,
const str* addr, const str* atdomain)
{
static str domain;
int result;
if (pattern->cdb != 0) {
if (pattern->pattern.s[2] == '@') {
result = (atdomain->len == 0)
? 0
: cdb_find(pattern->cdb, atdomain->s+1, atdomain->len-1) != 0;
}
else {
result = (cdb_find(pattern->cdb, addr->s, addr->len) != 0) ?
1 :
cdb_find(pattern->cdb, atdomain->s, atdomain->len) != 0;
}
}
else if (pattern->file != 0) {
if (pattern->pattern.s[2] == '@') {
if (atdomain->len > 0) {
str_copyb(&domain, atdomain->s+1, atdomain->len-1);
result = dict_get(pattern->file, &domain) != 0;
}
else
result = 0;
}
else {
result = (dict_get(pattern->file, addr) != 0) ?
1 :
dict_get(pattern->file, atdomain) != 0;
}
}
else
result = str_case_glob(addr, &pattern->pattern);
if (pattern->negated)
result = !result;
return result;
}
static void load_rcpthosts(void)
{
char* rh = read_file(0, "rcpthosts");
if (!dict_init(&rcpthosts)) oom();
if (rh) {
const char* curr = rh;
while (*curr) {
const char* end;
const char* next;
if ((end = strchr(curr, '\n')) != 0)
next = end + 1;
else
next = end = curr + strlen(curr);
if (*curr != '#') {
if (!str_copyb(&strbuf, curr, end-curr)) oom();
if (!dict_add(&rcpthosts, &strbuf, 0)) oom();
}
curr = next;
}
free(rh);
}
if ((morercpthosts_fd = open_file(0, "morercpthosts.cdb")) != -1)
cdb_init(&morercpthosts, morercpthosts_fd);
}
static void filter_server_data(char* data, ssize_t size)
{
if(saved_label.len > 0) {
/* Skip continuation data */
if(data[0] != '+') {
int resp;
/* Check if the response is tagged with the saved label */
str_copyb(&linebuf, data, size);
resp = parse_label();
if(resp > 0) {
if(!str_diff(&label, &saved_label)) {
log_line(data, size);
/* Check if the response was an OK */
if(!strncasecmp(linebuf.s + resp, "OK ", 3))
accept_client(username.s);
else
deny_client(username.s);
str_truncate(&saved_label, 0);
}
}
}
}
write_client(data, size);
}