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1) 在package/ utils下创建wifidog_lib目录。在wifidog_lib目录下创建一个文件夹src和一个Makefile文件。Makefile文件编写内容如下：
#
# Copyright (C) 2006,2013 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk PKG_NAME:=wifidog_lib
PKG_VERSION:=20130917PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)include $(INCLUDE_DIR)/package.mkdefine Package/wifidog_libSECTION:=utilsCATEGORY:=UtilitiesDEPENDS:=+iptables-mod-extra +iptables-mod-ipopt +iptables-mod-nat-extra +libpthreadTITLE:=A wireless captive portal solution
endefdefine Package/wifidog_lib/descriptionThe Wifidog project is a complete and embeddable captiveportal solution for wireless community groups or individualswho wish to open a free Hotspot while still preventing abuseof their Internet connection.
endefdefine Build/Preparemkdir -p $(PKG_BUILD_DIR)$(CP) ./src/* $(PKG_BUILD_DIR)/
endefdefine Build/Configure
endefdefine Build/Compile$(MAKE) -C $(PKG_BUILD_DIR) \CC="$(TARGET_CC)" \CFLAGS="$(TARGET_CFLAGS) -Wall" \LDFLAGS="$(TARGET_LDFLAGS)"
endefdefine Package/wifidog_lib/conffiles/etc/wifidog.conf
endefdefine Package/wifidog_lib/install$(INSTALL_DIR) $(1)/usr/bin$(INSTALL_BIN) $(PKG_BUILD_DIR)/test_wifidog $(1)/usr/bin/$(INSTALL_DIR) $(1)/usr/lib$(CP) $(PKG_BUILD_DIR)/libwifidog.so* $(1)/usr/lib/$(INSTALL_DIR) $(1)/etc$(INSTALL_DATA) $(PKG_BUILD_DIR)/wifidog.conf $(1)/etc/
endef$(eval $(call BuildPackage,wifidog_lib)) 2) 解压wifidog包进入src目录
tar xzvf wifidog-20130917-440445db60b0c3aff528ea703a828b0567293387.tar.gz –C src
3) 在src下创建Makefile文件，内容如下
LIB_VERMAJOR = 0
LIB_VERMINOR = 1
LIB_FILENAME = libhttpd.soLIBWIFIDOG_FILENAME = libwifidog.soOBJEXT = oCFLAGS += -Os -pipe -mno-branch-likely -mips32r2 -mtune=34kc -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -msoft-floatLIB_CFLAGS = $(CFLAGS) -shared -fPIC -DPIC
LIB_LDFLAGS = $(LDFLAGS) -Wl,-soname,$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)
LIBWIFIDOG_LDFLAGS = $(LDFLAGS) -Wl,-soname,$(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)wifidog_OBJECTS = src/conf.$(OBJEXT) src/commandline.$(OBJEXT)\src/debug.$(OBJEXT) src/fw_iptables.$(OBJEXT) src/firewall.$(OBJEXT) \src/gateway.$(OBJEXT) src/centralserver.$(OBJEXT) src/http.$(OBJEXT) \src/auth.$(OBJEXT) src/client_list.$(OBJEXT) src/util.$(OBJEXT) \src/wdctl_thread.$(OBJEXT) src/ping_thread.$(OBJEXT) src/safe.$(OBJEXT) \src/httpd_thread.$(OBJEXT) src/wifidogapi.$(OBJEXT)wdctl_OBJECTS = src/wdctl.$(OBJEXT)LIB_OBJ = libhttpd/protocol.o libhttpd/api.o libhttpd/version.o libhttpd/ip_acl.oDEFS = -DHAVE_CONFIG_H
DEFAULT_INCLUDES = -I.-I..
sysconfdir = /etc
AM_CPPFLAGS += \-I./libhttpd/ \-DSYSCONFDIR='"$(sysconfdir)"'COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \--mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
CCLD = $(CC)
LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \$(LDFLAGS) -o $@wifidog_LDADD = libhttpd/$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)LIBS = -lnsl -lpthreadall: Makefile libhttpd libwifidog test_wifidogtest_wifidog: src/test_wifidog.o libhttpd libwifidog@rm -f test_wifidog$(LINK) src/test_wifidog.o $(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR) $(LIBS)wdctl: $(wdctl_OBJECTS) libhttpd@rm -f wdctl$(LINK) $(wdctl_OBJECTS) $(wdctl_LDADD) $(LIBS)
wifidog_test: $(wifidog_OBJECTS) libhttpd@rm -f wifidog_test$(LINK) $(wifidog_OBJECTS) $(wifidog_LDADD) $(LIBS) libhttpd:$(LIB_OBJ) ./libhttpd/httpd_priv.h ./libhttpd/httpd.h$(CC) $(LIB_CFLAGS) $(LIB_LDFLAGS) $(LIB_OBJ) $(LIBS) \-o libhttpd/$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)libwifidog:$(wifidog_OBJECTS) $(wdctl_OBJECTS) $(LIB_OBJ) ./libhttpd/httpd_priv.h ./libhttpd/httpd.h$(CC) $(LIB_CFLAGS) $(LIBWIFIDOG_LDFLAGS) $(LIB_OBJ) $(wifidog_OBJECTS) $(wdctl_OBJECTS) $(LIBS) \-o $(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR).c.o:$(CC) $(DEFS) $(AM_CPPFLAGS) $(DEFAULT_INCLUDES) $(INCLUDES) $(CFLAGS) -MD -fPIC -DPIC -c -o $@ $<clean:rm -f $(LIB_FILENAME)*4) 修改src下对应的源代码，同时把scripts/init.d/wifidog脚本提供的功能通过lib库提供,这样 lib库需要提供int wifidogstart()，int wifidogstop()，int wifidogreload()，int wifidogrestart()。make package/wifidog_lib/compile V=s进行编译生成libwifidog.so.0.1和测试程序test_wifidog。
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