Added utility to run after first boot to set lan network address to cfe address automatically (not enabled by default)

network-address-from-cfe/Makefile

@@ -0,0 +1,41 @@
+#
+# Author: Martin K. Schröder <mkschreder.uk@gmail.com> 2015
+#
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=network-address-from-cfe
+PKG_VERSION:=0.0.1
+PKG_RELEASE:=1
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
+
+include $(INCLUDE_DIR)/package.mk
+
+LDFLAGS+= \
+        -Wl,-rpath-link=$(STAGING_DIR)/usr/lib \
+		-Wl,-rpath-link=$(STAGING_DIR)/lib
+
+define Package/network-address-from-cfe
+  CATEGORY:=Utilities
+  DEPENDS:=
+  TITLE:=utility to retreive default ip address from cfe nvram and configure lan to use that address by default
+endef
+
+define Package/network-address-from-cfe/description
+	network-address-from-cfe will set your lan ip address to the ip address found in cfe on broadcom box. 
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Package/network-address-from-cfe/install
+	$(INSTALL_DIR) $(1)/sbin/
+	$(INSTALL_DIR) $(1)/etc/rc.d/
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/network-address-from-cfe $(1)/sbin/
+	$(INSTALL_BIN) ./network-address-from-cfe.init $(1)/etc/rc.d/S13network-address-from-cfe-first-boot
+endef
+
+$(eval $(call BuildPackage,network-address-from-cfe))

network-address-from-cfe/network-address-from-cfe.init

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+#!/bin/sh /etc/rc.common
+
+/sbin/network-address-from-cfe > /dev/console
+
+echo "network-address-from-cfe: removing program after first boot after upgrade." > /dev/console
+rm /sbin/network-address-from-cfe 
+rm /etc/rc.d/S13network-address-from-cfe-first-boot

network-address-from-cfe/src/Makefile

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+all: 
+	$(CC) $(CFLAGS) -std=c99 -Wall -Werror -o network-address-from-cfe main.c -lc 

network-address-from-cfe/src/main.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <memory.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#define PROG "network-address-from-cfe"
+
+// ip address is at offset 0x586 in partition 3 (/dev/mtd3) on broadcom inteno box
+// this program will run once after upgrade and will then be deleted by the startup
+// script. It will simply read the ip address and set the address to cfe address upon 
+// first boot. 
+
+int main(void){
+	char buffer[0xfff]; 
+	memset(buffer, 0, sizeof(buffer)); 
+
+	printf("%s: searching for ip address in nvram..\n", PROG); 
+
+	int file = open("/dev/mtd3", O_RDONLY); 
+	if(file < 0) {
+		perror(PROG); 
+		return 0; 
+	}
+	int count = read(file, buffer, sizeof(buffer)); 
+	if(count <= 0){
+		perror(PROG); 
+		return 0; 
+	}
+	close(file); 
+	char ipaddr[16] = {0}; 
+	if(strncmp(buffer + 0x584, "e=", 2) != 0){
+		printf("%s: could not find ip address in flash\n", PROG); 
+		return 0; 
+	}
+	int cc = 0; 
+	for(char *ch = buffer + 0x586; *ch != ':' && cc < sizeof(ipaddr); ch++, cc++){
+		ipaddr[cc] = *ch; 
+	}
+	printf("%s: using ip address %s\n", PROG, ipaddr); 
+	
+	char command[255]; 
+	snprintf(command, sizeof(command), "uci set network.lan.ipaddr=%s", ipaddr); 
+	system(command); 
+	system("uci commit"); 
+	system("ubus call network reload"); 
+	return 0; 
+}