From a4bfc7fb366adc88931f662c20208dff8bc2899d Mon Sep 17 00:00:00 2001
From: William Robinet <william.robinet@conostix.com>
Date: Thu, 10 Aug 2023 09:36:12 +0200
Subject: [PATCH] Add FindJSONC.cmake module + fix CMakeLists.txt

---
 CMakeLists.txt                | 12 ++++-----
 cmake/modules/FindJSONC.cmake | 49 +++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 6 deletions(-)
 create mode 100644 cmake/modules/FindJSONC.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3dcaa8..777b306 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,12 +34,12 @@ set(SOURCES
 	pcap/sys.c
 )
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/modules/")
+set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/modules/" ${CMAKE_MODULE_PATH})
 
 find_package(OpenSSL REQUIRED)
 find_package(PCAP REQUIRED)
 find_package(LIBNET REQUIRED)
-find_package(json-c REQUIRED)
+find_package(JSONC REQUIRED)
 
 add_executable(${PROJECT_NAME} ${SOURCES})
 
@@ -63,14 +63,14 @@ target_include_directories(ssldump
         ${OPENSSL_INCLUDE_DIR}
         ${PCAP_INCLUDE_DIR}
         ${LIBNET_INCLUDE_DIR}
-        ${json-c_INCLUDE_DIR}
+        ${JSONC_INCLUDE_DIRS}
 )
 
 target_link_libraries(ssldump
     PRIVATE
         ${OPENSSL_LIBRARIES}
-        pcap
-        net
-        json-c
+        ${PCAP_LIBRARY}
+        ${LIBNET_LIBRARY}
+        ${JSONC_LIBRARIES}
 )
 
diff --git a/cmake/modules/FindJSONC.cmake b/cmake/modules/FindJSONC.cmake
new file mode 100644
index 0000000..69b792f
--- /dev/null
+++ b/cmake/modules/FindJSONC.cmake
@@ -0,0 +1,49 @@
+# From https://github.com/fastogt/cmake/blob/master/FindJSON-C.cmake
+# Copyright (c) 2018, FastoGT
+# License: BSD 3-Clause
+# Modified by: Micah Snyder
+
+# JSONC_FOUND - true if library and headers were found
+# JSONC_INCLUDE_DIRS - include directories
+# JSONC_LIBRARIES - library directories
+
+if(JSONC_USE_STATIC)
+  add_library(jsonc STATIC IMPORTED GLOBAL)
+else()
+  add_library(jsonc SHARED IMPORTED GLOBAL)
+endif(JSONC_USE_STATIC)
+
+find_package(PkgConfig QUIET)
+PKG_CHECK_MODULES(PC_JSONC QUIET json-c)
+
+find_path(JSONC_INCLUDE_DIR json.h
+  HINTS ${PC_JSONC_INCLUDEDIR} ${PC_JSONC_INCLUDE_DIRS} PATH_SUFFIXES json-c json)
+
+if(JSONC_USE_STATIC)
+  find_library(JSONC_LIBRARY NAMES libjson-c.a libjson-c-static.a
+    HINTS ${PC_JSONC_LIBDIR} ${PC_JSONC_LIBRARY_DIRS})
+else()
+  find_library(JSONC_LIBRARY NAMES json-c libjson-c
+    HINTS ${PC_JSONC_LIBDIR} ${PC_JSONC_LIBRARY_DIRS})
+endif(JSONC_USE_STATIC)
+
+set(JSONC_LIBRARIES ${JSONC_LIBRARY})
+set(JSONC_INCLUDE_DIRS ${JSONC_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(JSONC DEFAULT_MSG JSONC_LIBRARIES JSONC_INCLUDE_DIRS)
+
+if(JSONC_FOUND AND NOT TARGET JSONC::jsonc)
+  add_library(JSONC::jsonc UNKNOWN IMPORTED)
+  set_target_properties(JSONC::jsonc PROPERTIES
+    IMPORTED_LOCATION "${JSONC_LIBRARY}"
+    INTERFACE_COMPILE_OPTIONS "${PC_JSONC_CFLAGS_OTHER}"
+    INTERFACE_INCLUDE_DIRECTORIES "${JSONC_INCLUDE_DIRS}"
+  )
+endif()
+
+mark_as_advanced(
+  JSONC_INCLUDE_DIR
+  JSONC_LIBRARY
+)
+