792 lines
15 KiB
C
792 lines
15 KiB
C
/*
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* RouterBOOT configuration utility
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*
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* Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <linux/limits.h>
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#include "rbcfg.h"
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#include "cyg_crc.h"
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#define RBCFG_TMP_FILE "/tmp/.rbcfg"
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#define RBCFG_MTD_NAME "soft_config"
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#define RB_ERR_NOTFOUND 1
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#define RB_ERR_INVALID 2
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#define RB_ERR_NOMEM 3
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#define RB_ERR_IO 4
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#define ARRAY_SIZE(_a) (sizeof((_a)) / sizeof((_a)[0]))
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struct rbcfg_ctx {
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char *mtd_device;
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char *tmp_file;
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char *buf;
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unsigned buflen;
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};
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struct rbcfg_value {
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const char *name;
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const char *desc;
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union {
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uint32_t u32;
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const char *raw;
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} val;
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};
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#define RBCFG_ENV_TYPE_U32 0
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struct rbcfg_env {
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const char *name;
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int type;
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uint16_t id;
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const struct rbcfg_value *values;
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int num_values;
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};
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#define CMD_FLAG_USES_CFG 0x01
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struct rbcfg_command {
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const char *command;
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const char *usage;
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int flags;
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int (*exec)(int argc, const char *argv[]);
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};
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static void usage(void);
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/* Globals */
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static struct rbcfg_ctx *rbcfg_ctx;
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static char *rbcfg_name;
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#define CFG_U32(_name, _desc, _val) { \
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.name = (_name), \
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.desc = (_desc), \
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.val.u32 = (_val), \
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}
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static const struct rbcfg_value rbcfg_boot_delay[] = {
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CFG_U32("1", "1 second", RB_BOOT_DELAY_1SEC),
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CFG_U32("2", "2 seconds", RB_BOOT_DELAY_2SEC),
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CFG_U32("3", "3 seconds", RB_BOOT_DELAY_3SEC),
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CFG_U32("4", "4 seconds", RB_BOOT_DELAY_4SEC),
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CFG_U32("5", "5 seconds", RB_BOOT_DELAY_5SEC),
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CFG_U32("6", "6 seconds", RB_BOOT_DELAY_6SEC),
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CFG_U32("7", "7 seconds", RB_BOOT_DELAY_7SEC),
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CFG_U32("8", "8 seconds", RB_BOOT_DELAY_8SEC),
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CFG_U32("9", "9 seconds", RB_BOOT_DELAY_9SEC),
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};
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static const struct rbcfg_value rbcfg_boot_device[] = {
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CFG_U32("eth", "boot over Ethernet",
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RB_BOOT_DEVICE_ETHER),
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CFG_U32("nandeth", "boot from NAND, if fail then Ethernet",
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RB_BOOT_DEVICE_NANDETH),
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CFG_U32("ethnand", "boot Ethernet once, then NAND",
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RB_BOOT_DEVICE_ETHONCE),
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CFG_U32("nand", "boot from NAND only",
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RB_BOOT_DEVICE_NANDONLY),
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};
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static const struct rbcfg_value rbcfg_boot_key[] = {
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CFG_U32("any", "any key", RB_BOOT_KEY_ANY),
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CFG_U32("del", "<Delete> key only", RB_BOOT_KEY_DEL),
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};
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static const struct rbcfg_value rbcfg_boot_protocol[] = {
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CFG_U32("bootp", "BOOTP protocol", RB_BOOT_PROTOCOL_BOOTP),
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CFG_U32("dhcp", "DHCP protocol", RB_BOOT_PROTOCOL_DHCP),
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};
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static const struct rbcfg_value rbcfg_uart_speed[] = {
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CFG_U32("115200", "", RB_UART_SPEED_115200),
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CFG_U32("57600", "", RB_UART_SPEED_57600),
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CFG_U32("38400", "", RB_UART_SPEED_38400),
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CFG_U32("19200", "", RB_UART_SPEED_19200),
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CFG_U32("9600", "", RB_UART_SPEED_9600),
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CFG_U32("4800", "", RB_UART_SPEED_4800),
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CFG_U32("2400", "", RB_UART_SPEED_2400),
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CFG_U32("1200", "", RB_UART_SPEED_1200),
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CFG_U32("off", "disable console output", RB_UART_SPEED_OFF),
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};
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static const struct rbcfg_value rbcfg_cpu_mode[] = {
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CFG_U32("powersave", "power save", RB_CPU_MODE_POWERSAVE),
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CFG_U32("regular", "regular (better for -0c environment)",
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RB_CPU_MODE_REGULAR),
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};
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static const struct rbcfg_value rbcfg_booter[] = {
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CFG_U32("regular", "load regular booter", RB_BOOTER_REGULAR),
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CFG_U32("backup", "force backup-booter loading", RB_BOOTER_BACKUP),
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};
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static const struct rbcfg_env rbcfg_envs[] = {
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{
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.name = "boot_delay",
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.id = RB_ID_BOOT_DELAY,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_boot_delay,
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.num_values = ARRAY_SIZE(rbcfg_boot_delay),
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}, {
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.name = "boot_device",
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.id = RB_ID_BOOT_DEVICE,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_boot_device,
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.num_values = ARRAY_SIZE(rbcfg_boot_device),
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}, {
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.name = "boot_key",
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.id = RB_ID_BOOT_KEY,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_boot_key,
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.num_values = ARRAY_SIZE(rbcfg_boot_key),
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}, {
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.name = "boot_protocol",
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.id = RB_ID_BOOT_PROTOCOL,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_boot_protocol,
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.num_values = ARRAY_SIZE(rbcfg_boot_protocol),
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}, {
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.name = "booter",
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.id = RB_ID_BOOTER,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_booter,
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.num_values = ARRAY_SIZE(rbcfg_booter),
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}, {
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.name = "cpu_mode",
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.id = RB_ID_CPU_MODE,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_cpu_mode,
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.num_values = ARRAY_SIZE(rbcfg_cpu_mode),
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}, {
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.name = "uart_speed",
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.id = RB_ID_UART_SPEED,
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.type = RBCFG_ENV_TYPE_U32,
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.values = rbcfg_uart_speed,
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.num_values = ARRAY_SIZE(rbcfg_uart_speed),
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}
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};
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static inline uint16_t
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get_u16(const void *buf)
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{
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const uint8_t *p = buf;
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return ((uint16_t) p[1] + ((uint16_t) p[0] << 8));
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}
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static inline uint32_t
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get_u32(const void *buf)
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{
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const uint8_t *p = buf;
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return ((uint32_t) p[3] + ((uint32_t) p[2] << 8) +
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((uint32_t) p[1] << 16) + ((uint32_t) p[0] << 24));
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}
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static inline void
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put_u32(void *buf, uint32_t val)
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{
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uint8_t *p = buf;
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p[3] = val & 0xff;
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p[2] = (val >> 8) & 0xff;
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p[1] = (val >> 16) & 0xff;
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p[0] = (val >> 24) & 0xff;
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}
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static int
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rbcfg_find_tag(struct rbcfg_ctx *ctx, uint16_t tag_id, uint16_t *tag_len,
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void **tag_data)
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{
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uint16_t id;
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uint16_t len;
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char *buf = ctx->buf;
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unsigned int buflen = ctx->buflen;
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int ret = RB_ERR_NOTFOUND;
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/* skip magic and CRC value */
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buf += 8;
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buflen -= 8;
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while (buflen > 2) {
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len = get_u16(buf);
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buf += 2;
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buflen -= 2;
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if (buflen < 2)
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break;
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id = get_u16(buf);
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buf += 2;
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buflen -= 2;
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if (id == RB_ID_TERMINATOR)
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break;
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if (buflen < len)
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break;
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if (id == tag_id) {
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*tag_len = len;
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*tag_data = buf;
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ret = 0;
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break;
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}
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buf += len;
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buflen -= len;
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}
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if (ret)
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fprintf(stderr, "no tag found with id=%u\n", tag_id);
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return ret;
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}
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static int
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rbcfg_get_u32(struct rbcfg_ctx *ctx, uint16_t id, uint32_t *val)
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{
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void *tag_data;
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uint16_t tag_len;
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int err;
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err = rbcfg_find_tag(ctx, id, &tag_len, &tag_data);
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if (err)
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return err;
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*val = get_u32(tag_data);
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return 0;
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}
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static int
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rbcfg_set_u32(struct rbcfg_ctx *ctx, uint16_t id, uint32_t val)
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{
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void *tag_data;
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uint16_t tag_len;
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int err;
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err = rbcfg_find_tag(ctx, id, &tag_len, &tag_data);
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if (err)
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return err;
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put_u32(tag_data, val);
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return 0;
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}
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char *rbcfg_find_mtd(const char *name, int *erase_size)
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{
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FILE *f;
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int mtd_num;
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char dev[PATH_MAX];
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char *ret = NULL;
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struct stat s;
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int err;
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f = fopen("/proc/mtd", "r");
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if (!f)
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return NULL;
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while (1) {
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char *p;
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p = fgets(dev, sizeof(dev), f);
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if (!p)
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break;
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if (!strstr(dev, name))
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continue;
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err = sscanf(dev, "mtd%d: %08x", &mtd_num, erase_size);
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if (err != 2)
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break;
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sprintf(dev, "/dev/mtdblock%d", mtd_num);
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err = stat(dev, &s);
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if (err < 0)
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break;
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if ((s.st_mode & S_IFBLK) == 0)
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break;
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ret = malloc(strlen(dev) + 1);
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if (ret == NULL)
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break;
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strncpy(ret, dev, strlen(dev) + 1);
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break;
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}
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fclose(f);
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return ret;
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}
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static int
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rbcfg_check_tmp(struct rbcfg_ctx *ctx)
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{
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struct stat s;
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int err;
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err = stat(ctx->tmp_file, &s);
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if (err < 0)
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return 0;
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if ((s.st_mode & S_IFREG) == 0)
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return 0;
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if (s.st_size != ctx->buflen)
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return 0;
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return 1;
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}
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static int
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rbcfg_load(struct rbcfg_ctx *ctx)
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{
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uint32_t magic;
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uint32_t crc_orig, crc;
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char *name;
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int tmp;
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int fd;
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int err;
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tmp = rbcfg_check_tmp(ctx);
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name = (tmp) ? ctx->tmp_file : ctx->mtd_device;
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fd = open(name, O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "unable to open %s\n", name);
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err = RB_ERR_IO;
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goto err;
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}
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err = read(fd, ctx->buf, ctx->buflen);
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if (err != ctx->buflen) {
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fprintf(stderr, "unable to read from %s\n", name);
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err = RB_ERR_IO;
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goto err_close;
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}
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magic = get_u32(ctx->buf);
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if (magic != RB_MAGIC_SOFT) {
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fprintf(stderr, "invalid configuration\n");
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err = RB_ERR_INVALID;
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goto err_close;
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}
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crc_orig = get_u32(ctx->buf + 4);
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put_u32(ctx->buf + 4, 0);
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crc = cyg_ether_crc32((unsigned char *) ctx->buf, ctx->buflen);
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if (crc != crc_orig) {
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fprintf(stderr, "configuration has CRC error\n");
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err = RB_ERR_INVALID;
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goto err_close;
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}
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err = 0;
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err_close:
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close(fd);
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err:
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return err;
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}
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static int
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rbcfg_open()
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{
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char *mtd_device;
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struct rbcfg_ctx *ctx;
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int buflen;
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int err;
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mtd_device = rbcfg_find_mtd(RBCFG_MTD_NAME, &buflen);
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if (!mtd_device) {
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fprintf(stderr, "unable to find configuration\n");
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return RB_ERR_NOTFOUND;
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}
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ctx = malloc(sizeof(struct rbcfg_ctx) + buflen);
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if (ctx == NULL) {
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err = RB_ERR_NOMEM;
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goto err_free_mtd;
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}
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ctx->mtd_device = mtd_device;
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ctx->tmp_file = RBCFG_TMP_FILE;
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ctx->buflen = buflen;
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ctx->buf = (char *) &ctx[1];
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err = rbcfg_load(ctx);
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if (err)
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goto err_free_ctx;
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rbcfg_ctx = ctx;
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return 0;
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err_free_ctx:
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free(ctx);
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err_free_mtd:
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free(mtd_device);
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return err;
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}
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static int
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rbcfg_update(int tmp)
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{
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struct rbcfg_ctx *ctx = rbcfg_ctx;
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char *name;
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uint32_t crc;
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int fd;
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int err;
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put_u32(ctx->buf, RB_MAGIC_SOFT);
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put_u32(ctx->buf + 4, 0);
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crc = cyg_ether_crc32((unsigned char *) ctx->buf, ctx->buflen);
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put_u32(ctx->buf + 4, crc);
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name = (tmp) ? ctx->tmp_file : ctx->mtd_device;
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fd = open(name, O_WRONLY | O_CREAT);
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if (fd < 0) {
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fprintf(stderr, "unable to open %s for writing\n", name);
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err = RB_ERR_IO;
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goto out;
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}
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err = write(fd, ctx->buf, ctx->buflen);
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if (err != ctx->buflen) {
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err = RB_ERR_IO;
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goto out_close;
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}
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fsync(fd);
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err = 0;
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out_close:
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close(fd);
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out:
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return err;
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}
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static void
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rbcfg_close(void)
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{
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struct rbcfg_ctx *ctx;
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ctx = rbcfg_ctx;
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free(ctx->mtd_device);
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free(ctx);
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}
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static const struct rbcfg_value *
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rbcfg_env_find(const struct rbcfg_env *env, const char *name)
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{
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unsigned i;
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for (i = 0; i < env->num_values; i++) {
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const struct rbcfg_value *v = &env->values[i];
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if (strcmp(v->name, name) == 0)
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return v;
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}
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return NULL;
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}
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static const struct rbcfg_value *
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rbcfg_env_find_u32(const struct rbcfg_env *env, uint32_t val)
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{
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unsigned i;
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for (i = 0; i < env->num_values; i++) {
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const struct rbcfg_value *v = &env->values[i];
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if (v->val.u32 == val)
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return v;
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}
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return NULL;
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}
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static const char *
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rbcfg_env_get_u32(const struct rbcfg_env *env)
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{
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const struct rbcfg_value *v;
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uint32_t val;
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int err;
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err = rbcfg_get_u32(rbcfg_ctx, env->id, &val);
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if (err)
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return NULL;
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v = rbcfg_env_find_u32(env, val);
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if (v == NULL) {
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fprintf(stderr, "unknown value %08x found for %s\n",
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val, env->name);
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return NULL;
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}
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return v->name;
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}
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static int
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rbcfg_env_set_u32(const struct rbcfg_env *env, const char *data)
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{
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const struct rbcfg_value *v;
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int err;
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v = rbcfg_env_find(env, data);
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if (v == NULL) {
|
|
fprintf(stderr, "invalid value '%s'\n", data);
|
|
return RB_ERR_INVALID;
|
|
}
|
|
|
|
err = rbcfg_set_u32(rbcfg_ctx, env->id, v->val.u32);
|
|
return err;
|
|
}
|
|
|
|
static const char *
|
|
rbcfg_env_get(const struct rbcfg_env *env)
|
|
{
|
|
const char *ret = NULL;
|
|
|
|
switch (env->type) {
|
|
case RBCFG_ENV_TYPE_U32:
|
|
ret = rbcfg_env_get_u32(env);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
rbcfg_env_set(const struct rbcfg_env *env, const char *data)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (env->type) {
|
|
case RBCFG_ENV_TYPE_U32:
|
|
ret = rbcfg_env_set_u32(env, data);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
rbcfg_cmd_apply(int argc, const char *argv[])
|
|
{
|
|
return rbcfg_update(0);
|
|
}
|
|
|
|
static int
|
|
rbcfg_cmd_help(int argc, const char *argv[])
|
|
{
|
|
usage();
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
rbcfg_cmd_get(int argc, const char *argv[])
|
|
{
|
|
int err = RB_ERR_NOTFOUND;
|
|
int i;
|
|
|
|
if (argc != 1) {
|
|
usage();
|
|
return RB_ERR_INVALID;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_envs); i++) {
|
|
const struct rbcfg_env *env = &rbcfg_envs[i];
|
|
const char *value;
|
|
|
|
if (strcmp(env->name, argv[0]))
|
|
continue;
|
|
|
|
value = rbcfg_env_get(env);
|
|
if (value) {
|
|
fprintf(stdout, "%s\n", value);
|
|
err = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
rbcfg_cmd_set(int argc, const char *argv[])
|
|
{
|
|
int err = RB_ERR_INVALID;
|
|
int i;
|
|
|
|
if (argc != 2) {
|
|
/* not enough parameters */
|
|
usage();
|
|
return RB_ERR_INVALID;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_envs); i++) {
|
|
const struct rbcfg_env *env = &rbcfg_envs[i];
|
|
|
|
if (strcmp(env->name, argv[0]))
|
|
continue;
|
|
|
|
err = rbcfg_env_set(env, argv[1]);
|
|
if (err == 0)
|
|
err = rbcfg_update(1);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
rbcfg_cmd_show(int argc, const char *argv[])
|
|
{
|
|
int i;
|
|
|
|
if (argc != 0) {
|
|
usage();
|
|
return RB_ERR_INVALID;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_envs); i++) {
|
|
const struct rbcfg_env *env = &rbcfg_envs[i];
|
|
const char *value;
|
|
|
|
value = rbcfg_env_get(env);
|
|
if (value)
|
|
fprintf(stdout, "%s=%s\n", env->name, value);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rbcfg_command rbcfg_commands[] = {
|
|
{
|
|
.command = "apply",
|
|
.usage = "apply\n"
|
|
"\t- write configuration to the mtd device",
|
|
.flags = CMD_FLAG_USES_CFG,
|
|
.exec = rbcfg_cmd_apply,
|
|
}, {
|
|
.command = "help",
|
|
.usage = "help\n"
|
|
"\t- show this screen",
|
|
.exec = rbcfg_cmd_help,
|
|
}, {
|
|
.command = "get",
|
|
.usage = "get <name>\n"
|
|
"\t- get value of the configuration option <name>",
|
|
.flags = CMD_FLAG_USES_CFG,
|
|
.exec = rbcfg_cmd_get,
|
|
}, {
|
|
.command = "set",
|
|
.usage = "set <name> <value>\n"
|
|
"\t- set value of the configuration option <name> to <value>",
|
|
.flags = CMD_FLAG_USES_CFG,
|
|
.exec = rbcfg_cmd_set,
|
|
}, {
|
|
.command = "show",
|
|
.usage = "show\n"
|
|
"\t- show value of all configuration options",
|
|
.flags = CMD_FLAG_USES_CFG,
|
|
.exec = rbcfg_cmd_show,
|
|
}
|
|
};
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
char buf[255];
|
|
int len;
|
|
int i;
|
|
|
|
fprintf(stderr, "Usage: %s <command>\n", rbcfg_name);
|
|
|
|
fprintf(stderr, "\nCommands:\n");
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_commands); i++) {
|
|
const struct rbcfg_command *cmd;
|
|
cmd = &rbcfg_commands[i];
|
|
|
|
len = snprintf(buf, sizeof(buf), "%s", cmd->usage);
|
|
buf[len] = '\0';
|
|
fprintf(stderr, "%s\n", buf);
|
|
}
|
|
|
|
fprintf(stderr, "\nConfiguration options:\n");
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_envs); i++) {
|
|
const struct rbcfg_env *env;
|
|
int j;
|
|
|
|
env = &rbcfg_envs[i];
|
|
fprintf(stderr, "\n%s:\n", env->name);
|
|
for (j = 0; j < env->num_values; j++) {
|
|
const struct rbcfg_value *v = &env->values[j];
|
|
fprintf(stderr, "\t%-12s %s\n", v->name, v->desc);
|
|
}
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
int main(int argc, const char *argv[])
|
|
{
|
|
const struct rbcfg_command *cmd = NULL;
|
|
int ret;
|
|
int i;
|
|
|
|
rbcfg_name = (char *) argv[0];
|
|
|
|
if (argc < 2) {
|
|
usage();
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rbcfg_commands); i++) {
|
|
if (strcmp(rbcfg_commands[i].command, argv[1]) == 0) {
|
|
cmd = &rbcfg_commands[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (cmd == NULL) {
|
|
fprintf(stderr, "unknown command '%s'\n", argv[1]);
|
|
usage();
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
argc -= 2;
|
|
argv += 2;
|
|
|
|
if (cmd->flags & CMD_FLAG_USES_CFG) {
|
|
ret = rbcfg_open();
|
|
if (ret)
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
ret = cmd->exec(argc, argv);
|
|
|
|
if (cmd->flags & CMD_FLAG_USES_CFG)
|
|
rbcfg_close();
|
|
|
|
if (ret)
|
|
return EXIT_FAILURE;
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|