/* Initalise all providers */
void init_providers(void)
{
- rb_dlink_node *ptr;
- struct auth_provider *provider;
-
- RB_DLINK_FOREACH(ptr, auth_providers.head)
- {
- provider = ptr->data;
-
- if(provider->init && !provider->init())
- /* Provider failed to init, time to go */
- exit(1);
- }
+ load_provider(&rdns_provider);
}
/* Terminate all providers */
}
/* Begin authenticating user */
-static void start_auth(const char *cid, const char *l_ip, const char *l_port, const char *c_ip, const char *c_port)
+static void start_auth(const char *cid, const char *l_ip, const char *l_port, const char *c_addr, const char *c_port)
{
rb_dlink_node *ptr;
struct auth_provider *provider;
(void)rb_inet_pton_sock(l_ip, (struct sockaddr *)&auth->l_ip);
auth->l_port = (uint16_t)atoi(l_port); /* Safe cast, port shouldn't exceed 16 bits */
- (void)rb_inet_pton_sock(c_ip, (struct sockaddr *)&auth->c_ip);
+ (void)rb_inet_pton_sock(c_addr, (struct sockaddr *)&auth->c_addr);
auth->c_port = (uint16_t)atoi(c_port);
RB_DLINK_FOREACH(ptr, auth_providers.head)
--- /dev/null
+/* authd/providers/rdns.c - rDNS lookup provider for authd
+ * Copyright (c) 2016 Elizabeth Myers <elizabeth@interlinked.me>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "stdinc.h"
+#include "rb_commio.h"
+#include "authd.h"
+#include "provider.h"
+#include "res.h"
+#include "dns.h"
+
+struct dns_query
+{
+ rb_dlink_node node;
+
+ struct auth_client *auth; /* Our client */
+ struct DNSQuery query; /* DNS query */
+ time_t timeout; /* When the request times out */
+};
+
+/* Goinked from old s_auth.c --Elizabeth */
+static const char *messages[] =
+{
+ "*** Looking up your hostname...",
+ "*** Found your hostname",
+ "*** Couldn't look up your hostname",
+ "*** Your hostname is too long, ignoring hostname",
+};
+
+typedef enum
+{
+ REPORT_LOOKUP,
+ REPORT_FOUND,
+ REPORT_FAIL,
+ REPORT_TOOLONG,
+} dns_message;
+
+static EVH timeout_dns_queries_event;
+static void client_fail(struct dns_query *query, dns_message message);
+static void client_success(struct dns_query *query);
+static void get_dns_answer(void *userdata, struct DNSReply *reply);
+
+rb_dlink_list queries;
+static struct ev_entry *timeout_ev;
+int timeout = 30;
+
+
+bool client_dns_init(void)
+{
+ timeout_ev = rb_event_addish("timeout_dns_queries_event", timeout_dns_queries_event, NULL, 1);
+ return (timeout_ev != NULL);
+}
+
+void client_dns_destroy(void)
+{
+ rb_dlink_node *ptr, *nptr;
+ struct dns_query *query;
+
+ RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
+ {
+ client_fail(ptr->data, REPORT_FAIL);
+ rb_dlinkDelete(ptr, &queries);
+ rb_free(ptr);
+ }
+
+ rb_event_delete(timeout_ev);
+}
+
+bool client_dns_start(struct auth_client *auth)
+{
+ struct dns_query *query = rb_malloc(sizeof(struct dns_query));
+
+ query->auth = auth;
+ query->timeout = rb_current_time() + timeout;
+
+ query->query.ptr = query;
+ query->query.callback = get_dns_answer;
+
+ gethost_byaddr(&auth->c_addr, &query->query);
+ notice_client(auth, messages[REPORT_LOOKUP]);
+ return true;
+}
+
+void client_dns_cancel(struct auth_client *auth)
+{
+ rb_dlink_node *ptr;
+
+ /* Bah, the stupid DNS resolver code doesn't have a cancellation
+ * func... */
+ RB_DLINK_FOREACH(ptr, queries.head)
+ {
+ struct dns_query *query = ptr->data;
+
+ if(query->auth == auth)
+ {
+ /* This will get cleaned up later by the DNS stuff */
+ client_fail(query, REPORT_FAIL);
+ return;
+ }
+ }
+}
+
+static void
+get_dns_answer(void *userdata, struct DNSReply *reply)
+{
+ struct dns_query *query = userdata;
+ struct auth_client *auth = query->auth;
+ rb_dlink_node *ptr, *nptr;
+ bool fail = false;
+ dns_message response;
+
+ if(reply == NULL || auth == NULL)
+ {
+ response = REPORT_FAIL;
+ fail = true;
+ goto cleanup;
+ }
+
+ if(!sockcmp(&auth->c_addr, &reply->addr, GET_SS_FAMILY(&auth->c_addr)))
+ {
+ response = REPORT_FAIL;
+ fail = true;
+ goto cleanup;
+ }
+
+ if(strlen(reply->h_name) > HOSTLEN)
+ {
+ /* Ah well. */
+ response = REPORT_TOOLONG;
+ fail = true;
+ goto cleanup;
+ }
+
+ rb_strlcpy(auth->hostname, reply->h_name, HOSTLEN + 1);
+
+cleanup:
+ /* Clean us up off the pending queries list */
+ RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
+ {
+ struct dns_query *query_l = ptr->data;
+
+ if(query == query_l)
+ {
+ /* Found */
+ if(fail)
+ client_fail(query, response);
+ else
+ client_success(query);
+
+ rb_dlinkDelete(ptr, &queries);
+ rb_free(query);
+ return;
+ }
+ }
+}
+
+/* Timeout outstanding queries */
+static void timeout_dns_queries_event(void *notused)
+{
+ rb_dlink_node *ptr;
+
+ /* NOTE - we do not delete queries from the list from a timeout, when
+ * the query times out later it will be deleted.
+ */
+ RB_DLINK_FOREACH(ptr, queries.head)
+ {
+ struct dns_query *query = ptr->data;
+
+ if(query->auth && query->timeout < rb_current_time())
+ {
+ client_fail(query, REPORT_FAIL);
+ return;
+ }
+ }
+}
+
+static void client_fail(struct dns_query *query, dns_message report)
+{
+ struct auth_client *auth = query->auth;
+
+ if(auth)
+ {
+ rb_strlcpy(auth->hostname, "*", sizeof(auth->hostname));
+ notice_client(auth, messages[report]);
+ provider_done(auth, PROVIDER_RDNS);
+ query->auth = NULL;
+ }
+}
+
+static void client_success(struct dns_query *query)
+{
+ struct auth_client *auth = query->auth;
+
+ if(auth)
+ {
+ notice_client(auth, messages[REPORT_FOUND]);
+ provider_done(auth, PROVIDER_RDNS);
+ query->auth = NULL;
+ }
+}
+
+struct auth_provider rdns_provider =
+{
+ .id = PROVIDER_RDNS,
+ .init = client_dns_init,
+ .destroy = client_dns_destroy,
+ .start = client_dns_start,
+ .cancel = client_dns_cancel,
+ .completed = NULL,
+};
projects / solanum.git / commitdiff
