1 files changed, 103 insertions, 0 deletions
diff --git a/src/feature/control/fmt_serverstatus.c b/src/feature/control/fmt_serverstatus.c
new file mode 100644
index 0000000000..f150832ce3
--- /dev/null
+++ b/src/feature/control/fmt_serverstatus.c
@@ -0,0 +1,103 @@
+/* Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "core/or/or.h"
+#include "feature/control/fmt_serverstatus.h"
+
+#include "app/config/config.h"
+#include "feature/dirauth/voteflags.h"// XXXX remove
+#include "feature/nodelist/nodelist.h"
+#include "feature/relay/router.h"
+
+#include "feature/nodelist/node_st.h"
+#include "feature/nodelist/routerinfo_st.h"
+
+/**
+ * Allocate and return a description of the status of the server <b>desc</b>,
+ * for use in a v1-style router-status line.  The server is listed
+ * as running iff <b>is_live</b> is true.
+ *
+ * This is deprecated: it's only used for controllers that want outputs in
+ * the old format.
+ */
+static char *
+list_single_server_status(const routerinfo_t *desc, int is_live)
+{
+  char buf[MAX_NICKNAME_LEN+HEX_DIGEST_LEN+4]; /* !nickname=$hexdigest\0 */
+  char *cp;
+  const node_t *node;
+
+  tor_assert(desc);
+
+  cp = buf;
+  if (!is_live) {
+    *cp++ = '!';
+  }
+  node = node_get_by_id(desc->cache_info.identity_digest);
+  if (node && node->is_valid) {
+    strlcpy(cp, desc->nickname, sizeof(buf)-(cp-buf));
+    cp += strlen(cp);
+    *cp++ = '=';
+  }
+  *cp++ = '$';
+  base16_encode(cp, HEX_DIGEST_LEN+1, desc->cache_info.identity_digest,
+                DIGEST_LEN);
+  return tor_strdup(buf);
+}
+
+/** Based on the routerinfo_ts in <b>routers</b>, allocate the
+ * contents of a v1-style router-status line, and store it in
+ * *<b>router_status_out</b>.  Return 0 on success, -1 on failure.
+ *
+ * If for_controller is true, include the routers with very old descriptors.
+ *
+ * This is deprecated: it's only used for controllers that want outputs in
+ * the old format.
+ */
+int
+list_server_status_v1(smartlist_t *routers, char **router_status_out,
+                      int for_controller)
+{
+  /* List of entries in a router-status style: An optional !, then an optional
+   * equals-suffixed nickname, then a dollar-prefixed hexdigest. */
+  smartlist_t *rs_entries;
+  time_t now = time(NULL);
+  time_t cutoff = now - ROUTER_MAX_AGE_TO_PUBLISH;
+  const or_options_t *options = get_options();
+  /* We include v2 dir auths here too, because they need to answer
+   * controllers. Eventually we'll deprecate this whole function;
+   * see also networkstatus_getinfo_by_purpose(). */
+  int authdir = authdir_mode_publishes_statuses(options);
+  tor_assert(router_status_out);
+
+  rs_entries = smartlist_new();
+
+  SMARTLIST_FOREACH_BEGIN(routers, routerinfo_t *, ri) {
+    const node_t *node = node_get_by_id(ri->cache_info.identity_digest);
+    tor_assert(node);
+    if (authdir) {
+      /* Update router status in routerinfo_t. */
+      dirserv_set_router_is_running(ri, now);
+    }
+    if (for_controller) {
+      char name_buf[MAX_VERBOSE_NICKNAME_LEN+2];
+      char *cp = name_buf;
+      if (!node->is_running)
+        *cp++ = '!';
+      router_get_verbose_nickname(cp, ri);
+      smartlist_add_strdup(rs_entries, name_buf);
+    } else if (ri->cache_info.published_on >= cutoff) {
+      smartlist_add(rs_entries, list_single_server_status(ri,
+                                                          node->is_running));
+    }
+  } SMARTLIST_FOREACH_END(ri);
+
+  *router_status_out = smartlist_join_strings(rs_entries, " ", 0, NULL);
+
+  SMARTLIST_FOREACH(rs_entries, char *, cp, tor_free(cp));
+  smartlist_free(rs_entries);
+
+  return 0;
+}