* charybdis: A slightly useful ircd.
* blacklist.c: Manages DNS blacklist entries and lookups
*
- * Copyright (C) 2006-2008 charybdis development team
+ * Copyright (C) 2006-2011 charybdis development team
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
- * $Id: blacklist.c 2743 2006-11-10 15:15:00Z jilles $
*/
#include "stdinc.h"
if (reply != NULL)
{
- /* only accept 127.0.0.x as a listing */
+ /* only accept 127.x.y.z as a listing */
if (reply->addr.ss_family == AF_INET &&
- !memcmp(&((struct sockaddr_in *)&reply->addr)->sin_addr, "\177\0\0", 3))
+ !memcmp(&((struct sockaddr_in *)&reply->addr)->sin_addr, "\177", 1))
listed = TRUE;
else if (blcptr->blacklist->lastwarning + 3600 < rb_current_time())
{
rb_free(blcptr);
}
-/* XXX: no IPv6 implementation, not to concerned right now though. */
static void initiate_blacklist_dnsquery(struct Blacklist *blptr, struct Client *client_p)
{
struct BlacklistClient *blcptr = rb_malloc(sizeof(struct BlacklistClient));
char buf[IRCD_RES_HOSTLEN + 1];
- int ip[4];
+ uint8_t *ip;
blcptr->blacklist = blptr;
blcptr->client_p = client_p;
blcptr->dns_query.ptr = blcptr;
blcptr->dns_query.callback = blacklist_dns_callback;
- /* XXX: yes I know this is bad, I don't really care right now */
- sscanf(client_p->sockhost, "%d.%d.%d.%d", &ip[3], &ip[2], &ip[1], &ip[0]);
+ if ((client_p->localClient->ip.ss_family == AF_INET) && blptr->ipv4)
+ {
+ ip = (uint8_t *)&((struct sockaddr_in *)&client_p->localClient->ip)->sin_addr.s_addr;
+
+ /* becomes 2.0.0.127.torbl.ahbl.org or whatever */
+ rb_snprintf(buf, sizeof buf, "%d.%d.%d.%d.%s",
+ (unsigned int) ip[3],
+ (unsigned int) ip[2],
+ (unsigned int) ip[1],
+ (unsigned int) ip[0],
+ blptr->host);
+ }
+ /* IPv6 is supported now. --Elizabeth */
+ else if ((client_p->localClient->ip.ss_family == AF_INET6) && blptr->ipv6)
+ {
+ /* Breaks it into ip[0] = 0x00, ip[1] = 0x00... ip[16] = 0x01 for localhost
+ * I wish there was a uint4_t for C, this would make the below cleaner, but... */
+ ip = (uint8_t *)&((struct sockaddr_in6 *)&client_p->localClient->ip)->sin6_addr.s6_addr;
+ char *bufptr = buf;
+ int i;
+
+ /* The below will give us something like
+ * 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.foobl.invalid
+ */
+
+ /* Going backwards */
+ for (i = 15; i >= 0; i--)
+ {
+ /* Get upper and lower nibbles (yes this works fine on
+ * both big and little endian) */
+ uint8_t hi = (ip[i] >> 4) & 0x0F;
+ uint8_t lo = ip[i] & 0x0F;
+
+ /* One part... (why 5? rb_snprintf adds \0) */
+ rb_snprintf(bufptr, 5, "%1x.%1x.",
+ (unsigned int) lo, /* Remember, backwards */
+ (unsigned int) hi);
+
+ /* Lurch forward to next position */
+ bufptr += 4;
+ }
- /* becomes 2.0.0.127.torbl.ahbl.org or whatever */
- rb_snprintf(buf, sizeof buf, "%d.%d.%d.%d.%s", ip[0], ip[1], ip[2], ip[3], blptr->host);
+ /* Tack host on */
+ strcpy(bufptr, blptr->host);
+ }
+ /* This shouldn't happen... */
+ else
+ return;
gethost_byname_type(buf, &blcptr->dns_query, T_A);
}
/* public interfaces */
-struct Blacklist *new_blacklist(char *name, char *reject_reason)
+struct Blacklist *new_blacklist(char *name, char *reject_reason, int ipv4, int ipv6)
{
struct Blacklist *blptr;
blptr->status &= ~CONF_ILLEGAL;
rb_strlcpy(blptr->host, name, IRCD_RES_HOSTLEN + 1);
rb_strlcpy(blptr->reject_reason, reject_reason, IRCD_BUFSIZE);
+ blptr->ipv4 = ipv4;
+ blptr->ipv6 = ipv6;
blptr->lastwarning = 0;
return blptr;
{
rb_dlink_node *nptr;
- /* We don't do IPv6 right now, sorry! */
- if (client_p->localClient->ip.ss_family == AF_INET6)
- return;
-
RB_DLINK_FOREACH(nptr, blacklist_list.head)
{
struct Blacklist *blptr = (struct Blacklist *) nptr->data;