Implement a basic node and nodelist type

The node_t type is meant to serve two key functions:

  1) Abstracting difference between routerinfo_t and microdesc_t
     so that clients can use microdesc_t instead of routerinfo_t.

  2) Being a central place to hold mutable state about nodes
     formerly held in routerstatus_t and routerinfo_t.

This patch implements a nodelist type that holds a node for every
router that we would consider using.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/or/or.h b/src/or/or.h
index 673a3920cf..e46237c365 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -1698,6 +1698,19 @@ typedef struct microdesc_t {
                       * XXX this probably should not stay a string. */
 } microdesc_t;
 
+/** DOCDOC */
+typedef struct node_t {
+  /** Used to look up the node_t by its identity digest. */
+  HT_ENTRY(node_t) ht_ent;
+  /** Position of the node within the list of nodes */
+  int nodelist_idx;
+
+  char identity[DIGEST_LEN];
+  microdesc_t *md;
+  routerinfo_t *ri;
+  routerstatus_t *rs;
+} node_t;
+
 /** How many times will we try to download a router's descriptor before giving
  * up? */
 #define MAX_ROUTERDESC_DOWNLOAD_FAILURES 8