canx any pending dns queries when we unload a module

dl.c

@@ -35,6 +35,7 @@
 #include "hash.h"
 #include "config.h"
 #include "log.h"
+#include "dns.h"
 #ifdef SQLSRV
 #include "sqlsrv/rta.h"
 #endif
@@ -1591,6 +1592,8 @@ unload_module (char *module_name, User * u)
 		return NS_FAILURE;
 	}
 
+	/* canx any DNS queries running */
+	canx_dns(module_name);
 	/* Check to see if this Module has any timers registered....  */
 	del_mod_timers (module_name);
 

dns.c

@@ -171,6 +171,30 @@ fini_adns() {
 	list_destroy_nodes(dnslist);
 	free(ads);
 }
+/** @brief Canx any DNS queries for modules we might be unloading
+ * 
+ * @param module name
+ * @return Nothing
+ */
+void 
+canx_dns(const char *modname) {
+	lnode_t *dnsnode;
+	DnsLookup *dnsdata;
+
+	SET_SEGV_LOCATION();
+	
+	dnsnode = list_first (dnslist);
+	while (dnsnode) {
+		dnsdata = lnode_get(dnsnode);
+		if (!ircstrcasecmp(dnsdata->mod_name, modname)) {
+			adns_cancel(dnsdata->q);
+			free (dnsdata->a);
+			free (dnsdata);
+		}
+	}
+}
+
+
 
 /** @brief Checks for Completed DNS queries
  *

dns.h

@@ -27,4 +27,5 @@
 int init_dns (void);
 void do_dns (void);
 void fini_adns();
+void  canx_dns(const char *modname);
 #endif /* _DNS_H_ */