From bcf5431ca0ea4a2deb09b806d8c2be6bb09232fb Mon Sep 17 00:00:00 2001
From: "Michael Altizer (mialtize)" <mialtize@cisco.com>
Date: Tue, 28 Aug 2018 17:31:01 -0400
Subject: [PATCH] Merge pull request #1341 in SNORT/snort3 from
 offload_reload_fix to master

Squashed commit of the following:

commit b2628f9106194a07c325951cf2cf3e02a117f90b
Author: Bhagya Tholpady <bbantwal@cisco.com>
Date:   Mon Aug 27 20:11:23 2018 -0400

    detection: allocate ips context data using hard coded max_ips_id == 32
---
 src/detection/ips_context.cc | 18 +++++++++++-------
 src/detection/ips_context.h  |  1 -
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/detection/ips_context.cc b/src/detection/ips_context.cc
index c7b04ad29..ac07d74e9 100644
--- a/src/detection/ips_context.cc
+++ b/src/detection/ips_context.cc
@@ -45,18 +45,23 @@ using namespace snort;
 // tests (and only tests) can reset the id
 static unsigned ips_id = 0;
 
-unsigned IpsContextData::get_ips_id()
-{ return ++ips_id; }
+// Only 5 inspectors currently use the ips context data.
+// FIXIT-L This limit should to be updated if any more inspectors/modules use it.
+constexpr unsigned max_ips_id = 32;
 
-unsigned IpsContextData::get_max_id()
-{ return ips_id; }
+unsigned IpsContextData::get_ips_id()
+{ 
+    ++ips_id;
+    assert( ips_id < max_ips_id );
+    return ips_id; 
+}
 
 //--------------------------------------------------------------------------
 // context methods
 //--------------------------------------------------------------------------
 
 IpsContext::IpsContext(unsigned size) :
-    data(size ? size : IpsContextData::get_max_id() + 1, nullptr)
+    data(size ? size : max_ips_id, nullptr)
 {
     packet = new Packet(false);
     encode_packet = nullptr;
@@ -142,13 +147,12 @@ int TestData::count = 0;
 TEST_CASE("IpsContextData id", "[IpsContextData]")
 {
     ips_id = 0;
-    CHECK(IpsContextData::get_max_id() == 0);
 
     auto id1 = IpsContextData::get_ips_id();
     auto id2 = IpsContextData::get_ips_id();
     CHECK(id1 != id2);
 
-    CHECK(IpsContextData::get_max_id() == id2);
+    CHECK(max_ips_id > id2 );
 }
 
 TEST_CASE("IpsContext basic", "[IpsContext]")
diff --git a/src/detection/ips_context.h b/src/detection/ips_context.h
index f9fb6eef4..86031c099 100644
--- a/src/detection/ips_context.h
+++ b/src/detection/ips_context.h
@@ -58,7 +58,6 @@ public:
     virtual ~IpsContextData() = default;
 
     static unsigned get_ips_id();
-    static unsigned get_max_id();
     virtual void clear() {}
 
 protected:
-- 
2.47.3