let alice recognize a y.onion address and, uhm, do something

svn:r1422

src/or/connection_edge.c

@@ -696,6 +696,7 @@ static void connection_edge_consider_sending_sendme(connection_t *conn) {
   }
 }
 
+/* return -1 if an unexpected error with conn, else 0. */
 static int connection_ap_handshake_process_socks(connection_t *conn) {
   socks_request_t *socks;
   int sockshere;
@@ -724,9 +725,27 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
     return sockshere;
   } /* else socks handshake is done, continue processing */
 
+  /* this call _modifies_ socks->address iff it's a hidden-service request */
+  if (rend_parse_rendezvous_address(socks->address) < 0) {
+    /* normal request */
     conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
     /* attaching to a dirty circuit is fine */
     return connection_ap_handshake_attach_circuit(conn,0);
+  } else {
+    /* it's a hidden-service request */
+    const char *descp;
+    int desc_len;
+
+    /* see if we already have it cached */
+    if (rend_cache_lookup(socks->address, &descp, &desc_len) == 1) {
+      /* then pick and launch a rendezvous circuit */
+      /* go into some other state */
+    } else {
+      /* initiate a dir hidserv desc lookup */
+      /* go into a state where you'll be notified of the answer */
+    }
+  }
+  return 0;
 }
 
 static int connection_ap_handshake_attach_circuit(connection_t *conn,

src/or/or.h

@@ -1012,6 +1012,8 @@ void rend_cache_clean(void);
 int rend_cache_lookup(char *query, const char **desc, int *desc_len);
 int rend_cache_store(char *desc, int desc_len);
 
+int rend_parse_rendezvous_address(char *address);
+
 /********************************* rendservice.c ***************************/
 
 int rend_config_services(or_options_t *options);

src/or/rendcommon.c

@@ -244,4 +244,15 @@ int rend_cache_store(char *desc, int desc_len)
   return 0;
 }
 
+/* ==== General utility functions for rendezvous. */
+
+/* If address is of the form "y.onion" with a well-formed handle y,
+ * then put a '\0' after y and return 0.
+ * Else return -1 and change nothing.
+ */
+int rend_parse_rendezvous_address(char *address) {
+
+
+  return -1;
+}