refactor: Split file by functionality

Author: MikeWang000000

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
           sudo apt-get install -y clang-format
       - name: Run clang-format
         run: |
-          clang-format --dry-run --Werror src/*.c
+          clang-format --dry-run --Werror src/*.c include/*.h
 
   Build:
     name: Build
@@ -130,9 +130,9 @@ jobs:
           VERSION="${{ inputs.version }}"
 
           if [ -n "$VERSION" ]; then
-              make STATIC=1 CROSS_PREFIX="$CROSS_PREFIX" VERSION="$VERSION"
+              make -j$(nproc) CFLAGS="-Werror" STATIC=1 CROSS_PREFIX="$CROSS_PREFIX" VERSION="$VERSION"
           else
-              make STATIC=1 CROSS_PREFIX="$CROSS_PREFIX"
+              make -j$(nproc) CFLAGS="-Werror" STATIC=1 CROSS_PREFIX="$CROSS_PREFIX"
           fi
       - name: Upload ${{ matrix.name }}
         uses: actions/upload-artifact@v4

Makefile

@@ -2,17 +2,21 @@ CROSS_PREFIX :=
 CC=$(CROSS_PREFIX)gcc
 STRIP=$(CROSS_PREFIX)strip
 
-override CFLAGS+=-O3 -std=c99 -pedantic -Wall -Wextra
+PREFIX=/usr/local
+BINDIR=$(PREFIX)/bin
+SRCDIR=src
+INCLUDEDIR=include
+BUILDDIR=build
+SRCS := $(wildcard $(SRCDIR)/*.c)
+OBJS := $(patsubst $(SRCDIR)/%.c,$(BUILDDIR)/%.o,$(SRCS))
+
+override CFLAGS+=-O3 -std=c99 -I$(INCLUDEDIR) -pedantic -Wall -Wextra
 override LDFLAGS+=-lnetfilter_queue -lnfnetlink -lmnl
 
 ifdef VERSION
-    override CFLAGS += -DVERSION=\"$(VERSION)\"
+	override CFLAGS += -DVERSION=\"$(VERSION)\"
 endif
 
-PREFIX=/usr/local
-BINDIR=$(PREFIX)/bin
-BUILDDIR=build
-
 FAKEHTTP=$(BUILDDIR)/fakehttp
 
 ifeq ($(STATIC), 1)
@@ -24,9 +28,17 @@ all: $(FAKEHTTP)
 clean:
 	$(RM) -r $(BUILDDIR)
 
-$(FAKEHTTP): src/fakehttp.c
+$(BUILDDIR):
 	mkdir -p $(BUILDDIR)
-	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
+
+$(BUILDDIR)/%.d: $(SRCDIR)/%.c | $(BUILDDIR)
+	$(CC) $(CFLAGS) -MM -MT $(@:.d=.o) $< -MF $@
+
+$(BUILDDIR)/%.o: $(SRCDIR)/%.c | $(BUILDDIR)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(FAKEHTTP): $(OBJS) $(MKS)
+	$(CC) $(OBJS) -o $@ $(LDFLAGS)
 	$(STRIP) $@
 
 install: all
@@ -37,3 +49,7 @@ uninstall:
 	$(RM) $(DESTDIR)$(BINDIR)/fakehttp
 
 .PHONY: all clean install uninstall
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(OBJS:.o=.d)
+endif

include/globvar.h

@@ -0,0 +1,47 @@
+/*
+ * globvar.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_GLOBVAR_H
+#define FH_GLOBVAR_H
+
+#include <stdint.h>
+#include <stdio.h>
+
+struct fh_context {
+    int exit;
+    int sockfd;
+    FILE *logfp;
+
+    /* -d */ int daemon;
+    /* -h */ const char *hostname;
+    /* -i */ const char *iface;
+    /* -k */ int killproc;
+    /* -m */ uint32_t fwmark;
+    /* -n */ uint32_t nfqnum;
+    /* -r */ int repeat;
+    /* -s */ int silent;
+    /* -t */ uint8_t ttl;
+    /* -w */ const char *logpath;
+    /* -x */ uint32_t fwmask;
+    /* -z */ int use_iptables;
+};
+
+extern struct fh_context g_ctx;
+
+#endif /* FH_GLOBVAR_H */

include/ipv4ipt.h

@@ -0,0 +1,27 @@
+/*
+ * ipv4ipt.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV4IPT_H
+#define FH_IPV4IPT_H
+
+int fh_ipt4_flush(int auto_create);
+
+int fh_ipt4_add(void);
+
+#endif /* FH_IPV4IPT_H */

include/ipv4nft.h

@@ -0,0 +1,27 @@
+/*
+ * ipv4nft.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV4NFT_H
+#define FH_IPV4NFT_H
+
+int fh_nft4_flush(int auto_create);
+
+int fh_nft4_add(void);
+
+#endif /* FH_IPV4NFT_H */

include/ipv4pkt.h

@@ -0,0 +1,31 @@
+/*
+ * ipv4pkt.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV4PKT_H
+#define FH_IPV4PKT_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+int fh_pkt4_make(char *buffer, size_t buffer_size, uint32_t saddr_be,
+                 uint32_t daddr_be, uint16_t sport_be, uint16_t dport_be,
+                 uint32_t seq_be, uint32_t ackseq_be, int psh,
+                 char *tcp_payload, size_t tcp_payload_size);
+
+#endif /* FH_IPV4PKT_H */

include/ipv6ipt.h

@@ -0,0 +1,29 @@
+/*
+ * ipv6ipt.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV6IPT_H
+#define FH_IPV6IPT_H
+
+/* TODO: NOT IMPLEMENTED */
+int fh_ipt6_flush(int auto_create);
+
+/* TODO: NOT IMPLEMENTED */
+int fh_ipt6_add(void);
+
+#endif /* FH_IPV6IPT_H */

include/ipv6nft.h

@@ -0,0 +1,29 @@
+/*
+ * ipv6nft.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV6NFT_H
+#define FH_IPV6NFT_H
+
+/* TODO: NOT IMPLEMENTED */
+int fh_nft6_flush(int auto_create);
+
+/* TODO: NOT IMPLEMENTED */
+int fh_nft6_add(void);
+
+#endif /* FH_IPV6NFT_H */

include/ipv6pkt.h

@@ -0,0 +1,32 @@
+/*
+ * ipv6pkt.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_IPV6PKT_H
+#define FH_IPV6PKT_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/* TODO: NOT IMPLEMENTED */
+int fh_pkt6_make(char *buffer, size_t buffer_size, uint8_t *saddr_be,
+                 uint8_t *daddr_be, uint16_t sport_be, uint16_t dport_be,
+                 uint32_t seq_be, uint32_t ackseq_be, int psh,
+                 char *tcp_payload, size_t tcp_payload_size);
+
+#endif /* FH_IPV6PKT_H */

include/logging.h

@@ -0,0 +1,39 @@
+/*
+ * logging.h - FakeHTTP: https://github.com/MikeWang000000/FakeHTTP
+ *
+ * Copyright (C) 2025  MikeWang000000
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FH_LOGGING_H
+#define FH_LOGGING_H
+
+#define E(...)     fh_logger(__func__, __FILE__, __LINE__, __VA_ARGS__)
+#define E_RAW(...) fh_logger_raw(__VA_ARGS__)
+#define E_INFO(...)      \
+    if (!g_ctx.silent) { \
+        E(__VA_ARGS__);  \
+    }
+
+int fh_logger_setup(void);
+
+void fh_logger_cleanup(void);
+
+void fh_logger(const char *funcname, const char *filename, unsigned long line,
+               const char *fmt, ...);
+
+void fh_logger_raw(const char *fmt, ...);
+
+#endif /* FH_LOGGING_H */