From a99752d30c73cd5040c9da3c05da3bbc2dc1b67e Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 15 Jun 2019 23:46:00 +0200
Subject: fix gnunet-gns performance issue for many egos

---
 src/identity/Makefile.am               |  1 +
 src/identity/gnunet-service-identity.c | 71 ++++++++++++++++++++++++++++++++++
 src/identity/identity.h                |  3 +-
 3 files changed, 74 insertions(+), 1 deletion(-)

(limited to 'src/identity')

diff --git a/src/identity/Makefile.am b/src/identity/Makefile.am
index 6e587dc86..476d981bb 100644
--- a/src/identity/Makefile.am
+++ b/src/identity/Makefile.am
@@ -43,6 +43,7 @@ libgnunet_plugin_rest_identity_la_LDFLAGS = \
 libgnunetidentity_la_SOURCES = \
   identity_api.c \
   identity_api_lookup.c \
+  identity_api_suffix_lookup.c \
   identity.h
 libgnunetidentity_la_LIBADD = \
   $(top_builddir)/src/util/libgnunetutil.la \
diff --git a/src/identity/gnunet-service-identity.c b/src/identity/gnunet-service-identity.c
index a675a01f0..3e92a04cd 100644
--- a/src/identity/gnunet-service-identity.c
+++ b/src/identity/gnunet-service-identity.c
@@ -377,6 +377,73 @@ handle_lookup_message (void *cls,
 }
 
 
+/**
+ * Handler for LOOKUP message from client, sends information
+ * about ONE identity to the client immediately.
+ *
+ * @param cls unused
+ * @param message the message received
+ * @return #GNUNET_SYSERR if message was ill-formed
+ */
+static int
+check_lookup_by_suffix_message (void *cls,
+				const struct LookupMessage *message)
+{
+  GNUNET_MQ_check_zero_termination (message);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Handler for LOOKUP_BY_SUFFIX message from client, sends information
+ * about ONE identity to the client immediately.
+ *
+ * @param cls a `struct GNUNET_SERVICE_Client *`
+ * @param message the message received
+ */
+static void
+handle_lookup_by_suffix_message (void *cls,
+				 const struct LookupMessage *message)
+{
+  struct GNUNET_SERVICE_Client *client = cls;
+  const char *name;
+  struct GNUNET_MQ_Envelope *env;
+  struct Ego *lprefix;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Received LOOKUP_BY_SUFFIX message from client\n");
+  name = (const char *) &message[1];
+  lprefix = NULL;
+  for (struct Ego *ego = ego_head; NULL != ego; ego = ego->next)
+  {
+
+    if ((strlen (ego->identifier) <= strlen (name)) &&
+        (0 == strcmp (ego->identifier,
+		      &name[strlen (name) - strlen (ego->identifier)])) &&
+        ((strlen (name) == strlen (ego->identifier)) ||
+         ('.' == name[strlen (name) -
+		      strlen (ego->identifier) - 1])) &&
+        ((NULL == lprefix) ||
+         (strlen (ego->identifier) > strlen (lprefix->identifier))))
+    {
+      /* found better match, update! */
+      lprefix = ego;
+    }
+  }
+  if (NULL != lprefix)
+  {
+    env = create_update_message (lprefix);
+    GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
+    GNUNET_SERVICE_client_continue (client);
+    return;
+  }
+  send_result_code (client,
+                    0,
+                    "ego not found");
+  GNUNET_SERVICE_client_continue (client);
+}
+
+
 /**
  * Checks a #GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT message
  *
@@ -1118,6 +1185,10 @@ GNUNET_SERVICE_MAIN
                         GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP,
                         struct LookupMessage,
                         NULL),
+ GNUNET_MQ_hd_var_size (lookup_by_suffix_message,
+                        GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP_BY_SUFFIX,
+                        struct LookupMessage,
+                        NULL),
  GNUNET_MQ_hd_var_size (get_default_message,
                         GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT,
                         struct GetDefaultMessage,
diff --git a/src/identity/identity.h b/src/identity/identity.h
index 96550bdf2..6ef16e39d 100644
--- a/src/identity/identity.h
+++ b/src/identity/identity.h
@@ -62,7 +62,8 @@ struct ResultCodeMessage
 struct LookupMessage
 {
   /**
-   * Type: #GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP
+   * Type: #GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP or
+   * #GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP_BY_SUFFIX
    */
   struct GNUNET_MessageHeader header;
 
-- 
cgit v1.2.3