Makesystem for kernel module

.editorconfig

@@ -0,0 +1,6 @@
+root = true
+
+[*]
+indent_style = tab
+indent_size = 8
+tab_width = 8

.gitignore

@@ -4,3 +4,18 @@ build
 
 configure~
 
+# Kernel module files
+.Module.*
+.modules.*
+Module.*
+modules.*
+.youtubeKblock.*
+youtubeKblock.ko
+youtubeKblock.mod*
+youtubeKblock.o
+.mangle.*
+mangle.o
+.youtubeKUnblock.*
+youtubeKUnblock.ko
+youtubeKUnblock.mod*
+youtubeKUnblock.o

Kbuild

@@ -0,0 +1,3 @@
+obj-m := youtubeKUnblock.o
+youtubeKUnblock-objs := youtubeKblock.o mangle.o
+ccflags-y := -std=gnu11 -Wno-unused-variable -DKERNEL_SPACE

Makefile

@@ -1,85 +1,14 @@
-BUILD_DIR := $(CURDIR)/build
+USPACE_TARGETS := default all install uninstall dev run_dev
-DEPSDIR := $(BUILD_DIR)/deps
+KMAKE_TARGETS := kmake kload kunload kreload
 
-CC := gcc
+.PHONY: $(USPACE_TARGETS) $(KMAKE_TARGETS) clean
-LD := gcc
+$(USPACE_TARGETS):
-CFLAGS:=-Wall -Wpedantic -Wno-unused-variable -I$(DEPSDIR)/include -Os 
+	@$(MAKE) -f uspace.mk $@
-LDFLAGS:=-L$(DEPSDIR)/lib -static
 
-# PREFIX is environment variable, if not set default to /usr/local
+$(KMAKE_TARGETS):
-ifeq ($(PREFIX),)
+	@$(MAKE) -f kmake.mk $@
-	PREFIX := /usr/local
-else
-	PREFIX := $(DESTDIR)
-endif
-
-export CC LD CFLAGS LDFLAGS
-
-APP:=$(BUILD_DIR)/youtubeUnblock
-
-SRCS := youtubeUnblock.c mangle.c
-OBJS := $(SRCS:%.c=$(BUILD_DIR)/%.o)
-
-LIBNFNETLINK := $(DEPSDIR)/lib/libnfnetlink.a
-LIBMNL := $(DEPSDIR)/lib/libmnl.a
-LIBNETFILTER_QUEUE := $(DEPSDIR)/lib/libnetfilter_queue.a
-
-
-.PHONY: default all dev dev_attrs prepare_dirs
-default: all
-
-run_dev: dev
-	bash -c "sudo $(APP) 537"
-
-dev: dev_attrs all
-
-dev_attrs:
-	$(eval CFLAGS := $(CFLAGS) -DDEBUG -ggdb -g3)
-
-all: prepare_dirs $(APP)
-
-prepare_dirs:
-	mkdir -p $(BUILD_DIR)
-	mkdir -p $(DEPSDIR)
-
-$(LIBNFNETLINK):
-	cd deps/libnfnetlink && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
-	$(MAKE) -C deps/libnfnetlink
-	$(MAKE) install -C deps/libnfnetlink
-	
-$(LIBMNL):
-	cd deps/libmnl && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
-	$(MAKE) -C deps/libmnl
-	$(MAKE) install -C deps/libmnl
-
-$(LIBNETFILTER_QUEUE): $(LIBNFNETLINK) $(LIBMNL)
-	cd deps/libnetfilter_queue && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
-	$(MAKE) -C deps/libnetfilter_queue
-	$(MAKE) install -C deps/libnetfilter_queue
-
-$(APP): $(OBJS) $(LIBNETFILTER_QUEUE) $(LIBMNL)
-	@echo 'LD $(APP)'
-	@$(LD) $(OBJS) -o $(APP) -L$(DEPSDIR)/lib -lmnl -lnetfilter_queue
-
-$(BUILD_DIR)/%.o: %.c $(LIBNETFILTER_QUEUE) $(LIBMNL)
-	@echo 'CC $@'
-	@$(CC) -c $(CFLAGS) $^ -o $@
-
-install: all
-	install -d $(PREFIX)/bin/
-	install -m 755 $(APP) $(PREFIX)/bin/
-	install -d $(PREFIX)/lib/systemd/system/
-	@cp youtubeUnblock.service $(BUILD_DIR)
-	@sed -i 's/$$(PREFIX)/$(subst /,\/,$(PREFIX))/g' $(BUILD_DIR)/youtubeUnblock.service
-	install -m 644 $(BUILD_DIR)/youtubeUnblock.service $(PREFIX)/lib/systemd/system/
-
-uninstall:
-	rm $(PREFIX)/bin/youtubeUnblock
-	rm $(PREFIX)/lib/systemd/system/youtubeUnblock.service
-	systemctl disable youtubeUnblock.service
 
 clean:
-	rm -rf $(BUILD_DIR)
+	-@$(MAKE) -f kmake.mk kclean
-	$(MAKE) distclean -C deps/libnetfilter_queue || true
+	@$(MAKE) -f uspace.mk clean
-	$(MAKE) distclean -C deps/libmnl || true
+
-	$(MAKE) distclean -C deps/libnfnetlink || true

deps/libnfnetlink/.gitignore

@@ -15,3 +15,4 @@ Makefile.in
 /stamp-h1
 
 /*.pc
+doxygen.cfg

deps/libnfnetlink/doxygen.cfg

@@ -1,180 +0,0 @@
-DOXYFILE_ENCODING      = UTF-8
-PROJECT_NAME           = libnfnetlink
-PROJECT_NUMBER         = 1.0.2
-OUTPUT_DIRECTORY       = doxygen
-CREATE_SUBDIRS         = NO
-OUTPUT_LANGUAGE        = English
-BRIEF_MEMBER_DESC      = YES
-REPEAT_BRIEF           = YES
-ABBREVIATE_BRIEF       = 
-ALWAYS_DETAILED_SEC    = NO
-INLINE_INHERITED_MEMB  = NO
-FULL_PATH_NAMES        = NO
-STRIP_FROM_PATH        = 
-STRIP_FROM_INC_PATH    = 
-SHORT_NAMES            = NO
-JAVADOC_AUTOBRIEF      = NO
-QT_AUTOBRIEF           = NO
-MULTILINE_CPP_IS_BRIEF = NO
-INHERIT_DOCS           = YES
-SEPARATE_MEMBER_PAGES  = NO
-TAB_SIZE               = 8
-ALIASES                = 
-OPTIMIZE_OUTPUT_FOR_C  = YES
-OPTIMIZE_OUTPUT_JAVA   = NO
-OPTIMIZE_FOR_FORTRAN   = NO
-OPTIMIZE_OUTPUT_VHDL   = NO
-BUILTIN_STL_SUPPORT    = NO
-CPP_CLI_SUPPORT        = NO
-SIP_SUPPORT            = NO
-DISTRIBUTE_GROUP_DOC   = NO
-SUBGROUPING            = YES
-TYPEDEF_HIDES_STRUCT   = NO
-EXTRACT_ALL            = NO
-EXTRACT_PRIVATE        = NO
-EXTRACT_STATIC         = NO
-EXTRACT_LOCAL_CLASSES  = YES
-EXTRACT_LOCAL_METHODS  = NO
-EXTRACT_ANON_NSPACES   = NO
-HIDE_UNDOC_MEMBERS     = NO
-HIDE_UNDOC_CLASSES     = NO
-HIDE_FRIEND_COMPOUNDS  = NO
-HIDE_IN_BODY_DOCS      = NO
-INTERNAL_DOCS          = NO
-CASE_SENSE_NAMES       = YES
-HIDE_SCOPE_NAMES       = NO
-SHOW_INCLUDE_FILES     = YES
-INLINE_INFO            = YES
-SORT_MEMBER_DOCS       = YES
-SORT_BRIEF_DOCS        = NO
-SORT_GROUP_NAMES       = NO
-SORT_BY_SCOPE_NAME     = NO
-GENERATE_TODOLIST      = YES
-GENERATE_TESTLIST      = YES
-GENERATE_BUGLIST       = YES
-GENERATE_DEPRECATEDLIST= YES
-ENABLED_SECTIONS       = 
-MAX_INITIALIZER_LINES  = 30
-SHOW_USED_FILES        = YES
-FILE_VERSION_FILTER    = 
-QUIET                  = NO
-WARNINGS               = YES
-WARN_IF_UNDOCUMENTED   = YES
-WARN_IF_DOC_ERROR      = YES
-WARN_NO_PARAMDOC       = NO
-WARN_FORMAT            = "$file:$line: $text"
-WARN_LOGFILE           = 
-INPUT                  = .
-INPUT_ENCODING         = UTF-8
-FILE_PATTERNS          = *.c libnfnetlink.h
-RECURSIVE              = YES
-EXCLUDE                = 
-EXCLUDE_SYMLINKS       = NO
-EXCLUDE_PATTERNS       = */.git/* .*.d
-EXCLUDE_SYMBOLS        = EXPORT_SYMBOL
-EXAMPLE_PATH           = 
-EXAMPLE_PATTERNS       = 
-EXAMPLE_RECURSIVE      = NO
-IMAGE_PATH             = 
-INPUT_FILTER           = 
-FILTER_PATTERNS        = 
-FILTER_SOURCE_FILES    = NO
-SOURCE_BROWSER         = YES
-INLINE_SOURCES         = NO
-STRIP_CODE_COMMENTS    = YES
-REFERENCED_BY_RELATION = NO
-REFERENCES_RELATION    = NO
-REFERENCES_LINK_SOURCE = YES
-USE_HTAGS              = NO
-VERBATIM_HEADERS       = YES
-ALPHABETICAL_INDEX     = NO
-COLS_IN_ALPHA_INDEX    = 5
-IGNORE_PREFIX          = 
-GENERATE_HTML          = YES
-HTML_OUTPUT            = html
-HTML_FILE_EXTENSION    = .html
-HTML_HEADER            = 
-HTML_STYLESHEET        = 
-GENERATE_HTMLHELP      = NO
-GENERATE_DOCSET        = NO
-DOCSET_FEEDNAME        = "Doxygen generated docs"
-DOCSET_BUNDLE_ID       = org.doxygen.Project
-HTML_DYNAMIC_SECTIONS  = NO
-CHM_FILE               = 
-HHC_LOCATION           = 
-GENERATE_CHI           = NO
-BINARY_TOC             = NO
-TOC_EXPAND             = NO
-DISABLE_INDEX          = NO
-ENUM_VALUES_PER_LINE   = 4
-GENERATE_TREEVIEW      = NO
-TREEVIEW_WIDTH         = 250
-GENERATE_LATEX         = NO
-LATEX_OUTPUT           = latex
-LATEX_CMD_NAME         = latex
-MAKEINDEX_CMD_NAME     = makeindex
-COMPACT_LATEX          = NO
-PAPER_TYPE             = a4wide
-EXTRA_PACKAGES         = 
-LATEX_HEADER           = 
-PDF_HYPERLINKS         = YES
-USE_PDFLATEX           = YES
-LATEX_BATCHMODE        = NO
-LATEX_HIDE_INDICES     = NO
-GENERATE_RTF           = NO
-RTF_OUTPUT             = rtf
-COMPACT_RTF            = NO
-RTF_HYPERLINKS         = NO
-RTF_STYLESHEET_FILE    = 
-RTF_EXTENSIONS_FILE    = 
-GENERATE_MAN           = YES
-MAN_OUTPUT             = man
-MAN_EXTENSION          = .3
-MAN_LINKS              = NO
-GENERATE_XML           = NO
-XML_OUTPUT             = xml
-XML_PROGRAMLISTING     = YES
-GENERATE_AUTOGEN_DEF   = NO
-GENERATE_PERLMOD       = NO
-PERLMOD_LATEX          = NO
-PERLMOD_PRETTY         = YES
-PERLMOD_MAKEVAR_PREFIX = 
-ENABLE_PREPROCESSING   = YES
-MACRO_EXPANSION        = NO
-EXPAND_ONLY_PREDEF     = NO
-SEARCH_INCLUDES        = YES
-INCLUDE_PATH           = 
-INCLUDE_FILE_PATTERNS  = 
-PREDEFINED             = 
-EXPAND_AS_DEFINED      = 
-SKIP_FUNCTION_MACROS   = YES
-TAGFILES               = 
-GENERATE_TAGFILE       = 
-ALLEXTERNALS           = NO
-EXTERNAL_GROUPS        = YES
-PERL_PATH              = /usr/bin/perl
-CLASS_DIAGRAMS         = YES
-MSCGEN_PATH            = 
-HIDE_UNDOC_RELATIONS   = YES
-HAVE_DOT               = YES
-CLASS_GRAPH            = YES
-COLLABORATION_GRAPH    = YES
-GROUP_GRAPHS           = YES
-UML_LOOK               = NO
-TEMPLATE_RELATIONS     = NO
-INCLUDE_GRAPH          = YES
-INCLUDED_BY_GRAPH      = YES
-CALL_GRAPH             = NO
-CALLER_GRAPH           = NO
-GRAPHICAL_HIERARCHY    = YES
-DIRECTORY_GRAPH        = YES
-DOT_IMAGE_FORMAT       = png
-DOT_PATH               = 
-DOTFILE_DIRS           = 
-DOT_GRAPH_MAX_NODES    = 50
-MAX_DOT_GRAPH_DEPTH    = 0
-DOT_TRANSPARENT        = YES
-DOT_MULTI_TARGETS      = NO
-GENERATE_LEGEND        = YES
-DOT_CLEANUP            = YES
-SEARCHENGINE           = NO

kmake.mk

@@ -0,0 +1,26 @@
+#Kernel module makes here
+PWD := $(CURDIR)
+
+override CC		:= $(OCC) 
+override LD		:= $(OLD)
+override CFLAGS		:=
+override LDFLAGS	:=
+
+export CC LD CFLAGS LDFLAGS
+
+.PHONY: kmake kload kunload kreload kclean
+kmake:
+	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+
+kload:
+	insmod youtubeKUnblock.ko
+
+kunload:
+	-rmmod youtubeKUnblock
+
+kreload: kunload kload
+
+kclean:
+	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
+
+

mangle.c

@@ -1,5 +1,4 @@
 #include "mangle.h"
-#include <endian.h>
 
 #ifdef KERNEL_SPACE
 static __u16 nfq_checksum(__u32 sum, __u16 *buf, int size)
@@ -9,7 +8,7 @@ static __u16 nfq_checksum(__u32 sum, __u16 *buf, int size)
                 size -= sizeof(__u16);
         }
         if (size) {
-#if __BYTE_ORDER == __BIG_ENDIAN
+#ifdef __LITTLE_ENDIAN
                 sum += (uint16_t)*(uint8_t *)buf << 8;
 #else
                 sum += (__u16)*(__u8 *)buf;

mangle.h

@@ -16,10 +16,10 @@ typedef __u32 uint32_t;
 #include <linux/tcp.h>
 
 #include <asm/byteorder.h>
-#define ntohs(x) __constant_ntohs(x)
+// #define ntohs(x) __constant_ntohs(x)
-#define ntohl(x) __constant_ntohl(x)
+// #define ntohl(x) __constant_ntohl(x)
-#define htons(x) __constant_htons(x)
+// #define htons(x) __constant_htons(x)
-#define htonl(x) __constant_htonl(x)
+// #define htonl(x) __constant_htonl(x)
 
 #define	IP_RF 0x8000			/* reserved fragment flag */
 #define	IP_DF 0x4000			/* dont fragment flag */

uspace.mk

@@ -0,0 +1,89 @@
+#Userspace app makes here
+BUILD_DIR := $(CURDIR)/build
+DEPSDIR := $(BUILD_DIR)/deps
+
+CC:=gcc
+LD:=gcc
+CFLAGS:=-Wall -Wpedantic -Wno-unused-variable -I$(DEPSDIR)/include -Os 
+LDFLAGS:=-L$(DEPSDIR)/lib -static
+
+export CC LD CFLAGS LDFLAGS
+
+# PREFIX is environment variable, if not set default to /usr/local
+ifeq ($(PREFIX),)
+	PREFIX := /usr/local
+else
+	PREFIX := $(DESTDIR)
+endif
+
+
+APP:=$(BUILD_DIR)/youtubeUnblock
+
+SRCS := youtubeUnblock.c mangle.c
+OBJS := $(SRCS:%.c=$(BUILD_DIR)/%.o)
+
+LIBNFNETLINK := $(DEPSDIR)/lib/libnfnetlink.a
+LIBMNL := $(DEPSDIR)/lib/libmnl.a
+LIBNETFILTER_QUEUE := $(DEPSDIR)/lib/libnetfilter_queue.a
+
+
+.PHONY: default all dev dev_attrs prepare_dirs
+default: all
+
+run_dev: dev
+	bash -c "sudo $(APP) 537"
+
+dev: dev_attrs all
+
+dev_attrs:
+	$(eval CFLAGS := $(CFLAGS) -DDEBUG -ggdb -g3)
+
+all: prepare_dirs $(APP)
+
+prepare_dirs:
+	mkdir -p $(BUILD_DIR)
+	mkdir -p $(DEPSDIR)
+
+$(LIBNFNETLINK):
+	cd deps/libnfnetlink && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
+	$(MAKE) -C deps/libnfnetlink
+	$(MAKE) install -C deps/libnfnetlink
+	
+$(LIBMNL):
+	cd deps/libmnl && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
+	$(MAKE) -C deps/libmnl
+	$(MAKE) install -C deps/libmnl
+
+$(LIBNETFILTER_QUEUE): $(LIBNFNETLINK) $(LIBMNL)
+	cd deps/libnetfilter_queue && ./autogen.sh && ./configure --prefix=$(DEPSDIR) $(if $(CROSS_COMPILE_PLATFORM),--host=$(CROSS_COMPILE_PLATFORM),)
+	$(MAKE) -C deps/libnetfilter_queue
+	$(MAKE) install -C deps/libnetfilter_queue
+
+$(APP): $(OBJS) $(LIBNETFILTER_QUEUE) $(LIBMNL)
+	@echo 'LD $(APP)'
+	@$(LD) $(OBJS) -o $(APP) -L$(DEPSDIR)/lib -lmnl -lnetfilter_queue
+
+$(BUILD_DIR)/%.o: %.c $(LIBNETFILTER_QUEUE) $(LIBMNL)
+	@echo 'CC $@'
+	@$(CC) -c $(CFLAGS) $^ -o $@
+
+install: all
+	install -d $(PREFIX)/bin/
+	install -m 755 $(APP) $(PREFIX)/bin/
+	install -d $(PREFIX)/lib/systemd/system/
+	@cp youtubeUnblock.service $(BUILD_DIR)
+	@sed -i 's/$$(PREFIX)/$(subst /,\/,$(PREFIX))/g' $(BUILD_DIR)/youtubeUnblock.service
+	install -m 644 $(BUILD_DIR)/youtubeUnblock.service $(PREFIX)/lib/systemd/system/
+
+uninstall:
+	rm $(PREFIX)/bin/youtubeUnblock
+	rm $(PREFIX)/lib/systemd/system/youtubeUnblock.service
+	systemctl disable youtubeUnblock.service
+
+clean:
+	rm -rf $(BUILD_DIR)
+	$(MAKE) distclean -C deps/libnetfilter_queue || true
+	$(MAKE) distclean -C deps/libmnl || true
+	$(MAKE) distclean -C deps/libnfnetlink || true
+
+

youtubeKblock.c

@@ -0,0 +1,25 @@
+// Kernel module for youtubeUnblock.
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/printk.h>
+#include "mangle.h"
+
+
+
+
+static int __init ykb_init(void) {
+	pr_info("youtubeUnblock kernel module started.\n");
+	return 0;
+}
+
+static void __exit ykb_destroy(void) {
+	pr_info("youtubeUnblock kernel module destroyed.\n");
+}
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1");
+MODULE_AUTHOR("Vadim Vetrov <vetrovvd@gmail.com>");
+MODULE_DESCRIPTION("Linux kernel module for youtube unblock");
+
+module_init(ykb_init);
+module_exit(ykb_destroy);

youtubeUnblock.c

@@ -316,13 +316,11 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
 
 	const struct tcphdr *tcph = (const void *)(raw_payload + iph_len);
 	if ((const uint8_t *)tcph + 20 > raw_payload + raw_payload_len) {
-		printf("LZ\n");
 		goto fallback;
 	}
 
 	int tcph_len = tcph->doff * 4;
 	if ((const uint8_t *)tcph + tcph_len > raw_payload + raw_payload_len) {
-		printf("LZ\n");
 		goto fallback;
 	}