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本帖最后由 jiuweiljp 于 2024-1-4 01:05 编辑
使用条件：
1、有usb接口并且能驱动U pan的无视这个方法；
2、光猫不能telnet，并没有tftp或者wget、chmod命令也可以不用看；
正文如下
手上有一个闲置的中兴光猫F657GV9，焊接TTL线后启动信息如下（可无视）：
- U-Boot 2013.04 (Sep 11 2021 - 00:00:57)
- CPU : ZX279127S@A9,1000MHZ
- Board: ZXIC zx279127sevb
- 127s product_vid = 158
- DRAM: 256 MiB
- 127s product_vid = 158
- ,10000000,50000000
- cpuid=27912710
- 127s pinmux: 3f7ffffa 3ffffeff 19ff0555 6be1b
- 127s product_vid = 158
- bootsel=3
- NAND:
- Manu ID: 0x2c, Chip ID: 0x24 (Micron SPI NAND MT29F2G01ABAGDWB 256MiB 3,3V)
- 256 MiB
- <nand_read_skip_bad_,447>!mtdpart=0x1,offset=0x0,mtdpartoffset=0x180000,mtdPartsize=0x80000,length=0x20000
- In: serial
- Out: serial
- Err: serial
- clk_pll env is not setted, core clk won't change
- Net: enter ref_clk_set.. mode = 0 .
- enter pll_cfg_fractional
- ref_clk_set success!
- gpon serdes init
- addr 0x9400002c before value is 11000013
- addr 0x9400004c after value is 11003ff3
- eth0
- sec mode!
- Hit 1 to upgrade software version
- Hit any key to stop autoboot: 0
- addr=1200000
- addr=4200000
- select=0x0
- search=0x2
- <nand_read_skip_bad_,447>!mtdpart=0x6,offset=0x0,mtdpartoffset=0x200000,mtdPartsize=0x200000,length=0x1000
- tmp=0x00000000, value=0
- select=0x0
- search=0x2
- search->result[0].entry=1200240
- <nand_read_skip_bad_,447>!mtdpart=0x2,offset=0x0,mtdpartoffset=0x1200000,mtdPartsize=0x3000000,length=0x23e0000
- RSA Verify OK
- ---mtdparts_init--current_mtd_partnum=0-
- dev id: type = 2, num = 0, size = 0xffffffff, mtd_id = single part
- part : name = rootfs0, size = 0x023c0000, offset = 0x01220000
- part : name = rootfs1, size = 0x023c0000, offset = 0x04220000
- --- jffs2_part_info: partition number 0 for device nand0 (single part)
- jffs2_part_info:rootfs0,1220000
- ### JFFS2 loading '0uImage' to 0x44000000
- Scanning JFFS2 FS: ..................... done.
- ### JFFS2 load complete: 4344391 bytes loaded to 0x44000000
- 127s product_vid = 158
- <nand_read_skip_bad_,447>!mtdpart=0x0,offset=0x0,mtdpartoffset=0x0,mtdPartsize=0x180000,length=0x100000
- lseek=0x42080800
- cmdline=U-Boot V1.0.0P1N1 20210911001937
- output gpio:58, value=1, 0
- output gpio:59, value=1, 0
- ## Booting kernel from Legacy Image at 44000000 ...
- Image Name: Linux Kernel Image
- Image Type: ARM Linux Kernel Image (uncompressed)
- Data Size: 4344327 Bytes = 4.1 MiB
- Load Address: 40008000
- Entry Point: 40008000
- Verifying Checksum ... OK
- Loading Kernel Image ... OK
- OK
- ----------------------
- |-->setup versioninfo tag...
- Starting kernel ...
cpu（ZX279127S@A9,1000MHZ）后面再吐槽它，内存（DRAM: 256 MiB），闪存用的美光（Micron SPI NAND MT29F2G01ABAGDWB 256MiB 3,3V）其实这个光猫也有USB接口，我测量过没有5V输出，如果想USB好用需要补元件。
使用工具软件打开光猫telnet并登录后查看mtd信息
- / # cat /proc/mtd
- dev: size erasesize name
- mtd0: 10000000 00020000 "whole flash"
- mtd1: 00200000 00020000 "u-boot"
- mtd2: 00200000 00020000 "others"
- mtd3: 00200000 00020000 "parameter tags"
- mtd4: 00200000 00020000 "wlan"
- mtd5: 00800000 00020000 "usercfg"
- mtd6: 00200000 00020000 "middleware"
- mtd7: 03000000 00020000 "kernel1"
- mtd8: 03000000 00020000 "kernel2"
- mtd9: 01000000 00020000 "framework1"
- mtd10: 01000000 00020000 "framework2"
- mtd11: 01800000 00020000 "preplugin_data"
- mtd12: 05600000 00020000 "plugin_data"
- mtd13: 02fe0000 00020000 "rootfs"
1、mtd1-13 加起来是超过256MB的；
2、你不知道它mtd1-13在flash存储地址是不是按1-13这个编号连续分布的；
我查过启动信息如下：（我没看出来有MTD地址分布信息）
- /opt/cu/apps # ./busybox1 dmesg
- NET: Registered protocol family 24
- p p t p driver version 0.8.5
- 127s doesn't have USB3.0,just return -ENODEV
- **********TOP_CRM_BASE+0x2c=0x11393ff3******
- **********TOP_CRM_BASE+0x2c=0x113f3ff3******
- dwc2 9000000.usb: 1792 invalid for host_rx_fifo_size. Check HW configuration.
- dwc2 9000000.usb: 1024 invalid for host_nperio_tx_fifo_size. Check HW configuration.
- dwc2 9000000.usb: 1024 invalid for max_packet_count. Check HW configuration.
- dwc2 9000000.usb: DWC OTG Controller
- dwc2 9000000.usb: new USB bus registered, assigned bus number 1
- dwc2 9000000.usb: irq 60, io mem 0x00000000
- usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
- usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
- usb usb1: Product: DWC OTG Controller
- usb usb1: Manufacturer: Linux 4.1.25 dwc2_hsotg
- usb usb1: SerialNumber: 9000000.usb
- hub 1-0:1.0: USB hub found
- hub 1-0:1.0: 1 port detected
- usbcore: registered new interface driver cdc_acm
- cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
- usbcore: registered new interface driver usbserial
- usbcore: registered new interface driver usbserial_generic
- usbserial: USB Serial support registered for generic
- usbcore: registered new interface driver ch341
- usbserial: USB Serial support registered for ch341-uart
- usbcore: registered new interface driver cp210x
- usbserial: USB Serial support registered for cp210x
- usbcore: registered new interface driver pl2303
- usbserial: USB Serial support registered for pl2303
- mousedev: PS/2 mouse device common for all mice
- I2C probe start!
- zx_i2c_probe i2c-1 i2c-1->clk is ccdce7c0 ,clk rate is 100000000
- I2C probe successed!
- usbcore: registered new interface driver usbhid
- usbhid: USB HID core driver
- zx tempsensor: zx_bsp_tempsensor.regs = 0xf0500034,&(zx_bsp_tempsensor.regs->cfg)= 0xf0500034
- bsp_temp_start,val = 0x2ef
- (458):creat proc files for temper sensor!!!
- (463):temper sensor is running...
- zx tempsensor: work clock 0
- zx tempsensor: selector0's int num 27 allocated.
- zx tempsensor: selector1's int num 28 allocated.
- zx tempsensor: selector2's int num 29 allocated.
- Netfilter messages via NETLINK v0.30.
- nf_conntrack version 0.5.0 (3372 buckets, 60000 max)
- ip_set: protocol 6
- gre: GRE over IPv4 demultiplexor driver
- ip_tables: (C) 2000-2006 Netfilter Core Team
- NET: Registered protocol family 10
- ip6_tables: (C) 2000-2006 Netfilter Core Team
- sit: IPv6 over IPv4 tunneling driver
- NET: Registered protocol family 17
- bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
- Bridge firewalling registered
- Ebtables v2.0 registered
- l2tp_core: L2TP core driver, V2.0
- l2tp_ppp: PPPoL2TP kernel driver, V2.0
- 8021q: 802.1Q VLAN Support v1.8
- systools version:v0.7.5
- zte--oss cpu usage module init
- DPI interface Loaded
- e8_init OK!
- Registering SWP/SWPB emulation handler
- FLowRL module init
- DevBw module init
- jffs2: notice: (1) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- VFS: Mounted root (jffs2 filesystem) readonly on device 31:13.
- Freeing unused kernel memory: 212K (c07d3000 - c0808000)
- This architecture does not have kernel memory protection.
- jffs2: notice: (532) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- jffs2: notice: (577) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- jffs2: notice: (585) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- jffs2: notice: (587) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- 11930:23:02 [Klogfile][Error] [(1348)CheckLogConfFile] CheckLogConfFile%CheckRestartCntConfFile
- jffs2: notice: (578) check_node_data: wrong data CRC in data node at 0x006d5d7c: read 0x19d3a03, calculated 0x1e78a0ef.
- ubi0: attaching mtd12
- ubi0: scanning is finished
- ubi0: attached mtd12 (name "plugin_data", size 86 MiB)
- ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
- ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
- ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
- ubi0: good PEBs: 688, bad PEBs: 0, corrupted PEBs: 0
- ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128
- ubi0: max/mean erase counter: 14/9, WL threshold: 4096, image sequence number: 2012089330
- ubi0: available PEBs: 0, total reserved PEBs: 688, PEBs reserved for bad PEB handling: 16
- ubi0: background thread "ubi_bgt0d" started, PID 601
- UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 607
- UBIFS (ubi0:0): recovery needed
- UBIFS (ubi0:0): recovery completed
- UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "plugin_ubifs"
- UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
- UBIFS (ubi0:0): FS size: 83423232 bytes (79 MiB, 657 LEBs), journal size 4190208 bytes (3 MiB, 33 LEBs)
- UBIFS (ubi0:0): reserved for root: 3940284 bytes (3847 KiB)
- UBIFS (ubi0:0): media format: w4/r0 (latest is w4/r0), UUID 156BD46D-0725-43B0-AA2C-8A8DCD1D83F4, small LPT model
- jffs2: notice: (618) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
- lo up
- mux[0]=3f7ffffa
- mux[1]=3ffffeff
- mux[2]=19ff0555
- mux[3]=6be1b
- storage_wakeup_proc_create success!
- verinfo=U-Boot V1.0.0P1N1 20210911001937 0x1200000 0x0 0x8f 0x83
- can find /usr/java/osgi_verosgi_version_info_get error!
- data_in=0x0
- data_in=0x0
- >>TagaramodInit the typeindex: 5
- >>TagaramodInit the board_name: F657GV9 ,wan=0x40
- pon init
- ZX_PA_BUF_BASE0=4dea0000
- ZX_VA_BUF_BASE0=cdea0000
- ZX_BP_BUFFER_BASE=4dec0000
- ZX_DESC_BASE=4ee80000
- ZX_TX_UP_DESC_BASE=4ef40000
- ZX_TX_DN_DESC_BASE=4ef50000
- ZX_BPPE_SW_BASE=4dea0000
- ZX_BP_BUFFER_SW_BASE=4dec0000
- ZX_DESC_SW_BASE=4ea00000
- ZX_TX_UP_DESC_SW_BASE=4eac0000
- ZX_BPPE_BASE_127S=4eae0000
- ZX_BP_BUFFER_BASE_127S=4eb02000
- BP_BUFFER_SIZE_127S=b40000
- ZX_VA_TX_DN_DESC_BASE=cef50000
- BPPE_POOL_SIZE=1c00
- NORMAL_BP_BUFFER_SIZE=fc0000
- JUMBO_BP_SIZE=2800
- JUMBO_BPPE_POOL_SIZE=0
- BP_BUFFER_SIZE=fc0000
- lan_up=0, lan_up_port=0
- the pon mode is 40
- lan_up=0, lan_up_port=0
- g_pon_irq=36,d1000000,f0400000,f0500000,f0600000,d0e00000
- get npp irq succeed,g_npp_irq:38
- get tm irq succeed,g_tm_irq:41 tm_base:0xf4340000
- get pp irq succeed,g_pp_irq:37
- get idm irq succeed,g_idm_irq:39
- enter ref_clk_set.. mode = 0 .
- enter pll_cfg_fractional
- ref_clk_set success!
- serdes band cpu_temper:32 coarse:0x29
- band calc fin
- pon tm init
- enter pon_tm_bppe_pool_init
- bppe_va_addr = 0xceae0000
- jumbo_bppe_va_addr = 0xceaf0000
- BMU_JUMBO_BPPE_SW_PTR =0x0 (JUMBO_BPPE_SW_POOL_SIZE)<<16=0x0
- netif_napi_add() called with weight 512 on device pon
- DMA_UP_DESC_CNT = 0x0
- pon_tm net init ok,272/176
- pon_pp init
- pon_npp init
- idm_status_proc success!
- idm_desc_init d0c35000/4c980000
- request idm irq succeed
- idm net init ok
- switch_phy_int_check 0
- mac 0 link down
- switch_phy_int_check 1
- mac 1 link down
- switch_phy_int_check 2
- mac 2 link down
- switch_phy_int_check 3
- mac 3 link down
- register fpga driver success, major=222
- register peripheral success, major = 106
- = TM Module SYS FS Init ended successfully =
- tm_initModule begin...
- enter tm_sdk_init
- api lock init!!
- tm_initModule end...
- hw_power_optx_get_fordg:txdisable=0
- Kmodule ZX279511.ko insmod successfully !
- bob is not GN25L95: 40
- pon up
- ethdriver_init....
- g_mii_dev_name[0] sw
- g_mii_dev_name[1] pon
- sw up
- zteGpmac_devReg begin...
- zteGpmac_devReg end...
- enter zteGponCpuTypeAddrSet
- *
- asicGlbDb[97], 0x46,0x31007,0x0
- zteGpmac_initModule begin...
- === GponMac Supported MaxTcont: 16 MaxPLI: 800B ===
- htb debug 1 =====> inCnt =0,outCnt=0
- ##huoqf zteGponAsicStarttimeChkResultInit write cfg=10
- ##huoqf zteGponAsicStarttimeChkResultInit read cfg=10
- = PON Module Operate ended successfully =
- DEbug: GPON PIN_MUX_REG2:(0x19ff0555)
- DEbug: GPON GPIO_PDD_REG:(0xfac)
- DEbug: GPON GPIO_POSEDGE_REG:(0x4)
- DEbug: GPON PIN_MUX_REG3:(0x2be1b)
- create zteGpon_rei_task ok!
- = GMAC Module SYS FS Init ended successfully =
- zteGpmac_initModule end...
- gpon_Init ok
- gpondrv g_OnuType is 2
- 11930:23:06 [KMONITOR][Warn] [monitor.c(607)MontorSendMsg] netlink_unicast failedmsgid = 0xa5c2, ptr = bf26dd20, len = 4
- omci up
- Init switch module
- unicnt 4, wancnt 1, wifi cnt 0, all ports 5, portmask 0x0000002f
- Onu type is 1,Wan type is 4
- switch config GPON HGU mode!
- protocol fail, error deal 66
- [TM][dpa_set_protocol_type_i_act] failed
- protocol fail, error deal 65
- [TM][dpa_set_protocol_type_i_act] failed
- -------chip_tm_init end-----
- [SW][sw_init_switch] l2_fast init
- [SW]set cpu queue rate limit to 8000pps
- tm_port_egress_traffic_sharp_set p_port:5 p_ena:1 p_band_width:2048
- Capacity=256000tm_port_egress_traffic_sharp_set p_port:6 p_ena:1 p_band_width:2048
- Capacity=256000[SW][sw_init_switch] reg hff
- [SW][sw_init_switch] reg get statistics
- Init switch module Success
- bsp_i2c_probe 0x50 success!
- vendor name = ZTE_PX20+_G
- optical PN(0x60) =
- optical PN(0x28) = ZX279511
- tdm: exports duplicate symbol tdm_ch_close (owned by kernel)
- udpwatchd inited!
- kudp inited!
- Init codec v2.3(2019-05-17)!
- idm0 up
- idm1 up
- redirusb_init,no usb dev!
- random: dbus-uuidgen urandom read with 47 bits of entropy available
- gpondrvCfgXGRegInfoAdapter not support now!
- === GponMac Supported MaxTcont: 8 MaxPLI: 1536B ===
- htb debug 1 =====> inCnt =0,outCnt=0
- IPv6: ADDRCONF(NETDEV_UP): br0: link is not ready
- br0 up
- ethdrv_dev_ioctl ,brdev_set.port_id 0 ,brdev_set.name eth0 ,brdev_set.flag 0
- eth0 up
- ethdrv_dev_ioctl ,brdev_set.port_id 1 ,brdev_set.name eth1 ,brdev_set.flag 0
- eth1 up
- ethdrv_dev_ioctl ,brdev_set.port_id 2 ,brdev_set.name eth2 ,brdev_set.flag 0
- eth2 up
- ethdrv_dev_ioctl ,brdev_set.port_id 3 ,brdev_set.name eth3 ,brdev_set.flag 0
- eth3 up
- tm_port_egress_traffic_sharp_set p_port:3 p_ena:0 p_band_width:0
- Capacity=200000tm_port_egress_traffic_sharp_set p_port:2 p_ena:0 p_band_width:0
- Capacity=200000tm_port_egress_traffic_sharp_set p_port:1 p_ena:0 p_band_width:0
- Capacity=200000tm_port_egress_traffic_sharp_set p_port:0 p_ena:0 p_band_width:0
- Capacity=200000
- switch_phy_int_check 1
- pon0 up
- set_netdev_type dev (pon0) type (300) vendor name = ZTE_PX20+_G
- optical PN(0x60) =
- optical PN(0x28) = ZX279511
- device eth0 entered promiscuous mode
- set_netdev_type dev (eth0) type (800)
- device eth1 entered promiscuous mode
- set_netdev_type dev (eth1) type (800)
- device eth2 entered promiscuous mode
- br0: port 3(eth2) entered forwarding state
- br0: port 3(eth2) entered forwarding state
- IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready
- set_netdev_type dev (eth2) type (800)
- device eth3 entered promiscuous mode
- set_netdev_type dev (eth3) type (800) set_netdev_type dev (pon0) type (300) set_netdev_type dev (pon0) type (300) set_netdev_type dev (pon0) type (300)
- ch:0 pcm mode:G711A_U
- Siliconlab chip id error! 0x0
- cmd [ck 1389 1] not found
- ====EVENT_O7_STATE_SAVE OFF====
- cmd [ck 1392 1] not found
- cmd [ck 1387 1] not found
- random: nonblocking pool is initialized
- device br0 entered promiscuous mode
- tm_port_egress_traffic_sharp_set p_port:5 p_ena:0 p_band_width:0
- Capacity=200000tm_port_egress_traffic_sharp_set p_port:6 p_ena:0 p_band_width:0
- Capacity=200000
- overlayfs: missing 'workdir'
但是将这个mtd0自接考出来是不容易的，因为它的内存也就256MB，临时分区也容不下这个falsh影像
- /opt/cu/apps # df
- Filesystem 1024-blocks Used Available Use% Mounted on
- /dev/root 49024 37824 11200 77% /
- /dev/mtdblock3 2048 404 1644 20% /tagparam
- cgroup_root 108016 0 108016 0% /sys/fs/cgroup
- none 21604 0 21604 0% /run
- none 5120 0 5120 0% /run/lock
- none 108016 0 108016 0% /run/shm
- tmpfs 20480 448 20032 2% /var
- tmpfs 81920 2800 79120 3% /upgtempfile
- tmpfs 2048 0 2048 0% /mnt
- tmpfs 15360 4 15356 0% /tmp
- /dev/mtdblock5 8192 640 7552 8% /userconfig
- /dev/mtdblock6 2048 384 1664 19% /usr/local/ct
- /dev/mtdblock11 24576 6232 18344 25% /usr/tmp
- /dev/loop0 5376 5376 0 100% /usr/pre_plugin
- ubi0_0 74660 2864 67948 4% /opt/cu/apps
- /dev/mtdblock4 2048 436 1612 21% /wlan
- overlay 74660 2864 67948 4% /CuInform
- tmpfs 5240 24 5216 0% /CuInform/tmp
- overlay 74660 2864 67948 4% /usr/sbin
- /dev/mtdblock9 4352 4352 0 100% /opt/cu/framework
以上都是分析，下面是操作步骤：
方法一：采用压缩方法在拷贝flash的时候边拷贝边压缩，然后将压缩后的文件传给电脑：
- dd if=/dev/mtd0 | gzip > /upgtempfile/mtd0.gz
- /opt/cu/apps # ./xz-v5 -H
- Usage: ./xz-v5 [OPTION]... [FILE]...
- Compress or decompress FILEs in the .xz format.
- Mandatory arguments to long options are mandatory for short options too.
- Operation mode:
- -z, --compress force compression
- -d, --decompress force decompression
- -t, --test test compressed file integrity
- -l, --list list information about .xz files
- Operation modifiers:
- -k, --keep keep (don't delete) input files
- -f, --force force overwrite of output file and (de)compress links
- -c, --stdout write to standard output and don't delete input files
- --single-stream decompress only the first stream, and silently
- ignore possible remaining input data
- --no-sparse do not create sparse files when decompressing
- -S, --suffix=.SUF use the suffix `.SUF' on compressed files
- --files[=FILE] read filenames to process from FILE; if FILE is
- omitted, filenames are read from the standard input;
- filenames must be terminated with the newline character
- --files0[=FILE] like --files but use the null character as terminator
- Basic file format and compression options:
- -F, --format=FMT file format to encode or decode; possible values are
- `auto' (default), `xz', `lzma', and `raw'
- -C, --check=CHECK integrity check type: `none' (use with caution),
- `crc32', `crc64' (default), or `sha256'
- --ignore-check don't verify the integrity check when decompressing
- -0 ... -9 compression preset; default is 6; take compressor *and*
- decompressor memory usage into account before using 7-9!
- -e, --extreme try to improve compression ratio by using more CPU time;
- does not affect decompressor memory requirements
- -T, --threads=NUM use at most NUM threads; the default is 1; set to 0
- to use as many threads as there are processor cores
- --block-size=SIZE
- start a new .xz block after every SIZE bytes of input;
- use this to set the block size for threaded compression
- --block-list=SIZES
- start a new .xz block after the given comma-separated
- intervals of uncompressed data
- --flush-timeout=TIMEOUT
- when compressing, if more than TIMEOUT milliseconds has
- passed since the previous flush and reading more input
- would block, all pending data is flushed out
- --memlimit-compress=LIMIT
- --memlimit-decompress=LIMIT
- -M, --memlimit=LIMIT
- set memory usage limit for compression, decompression,
- or both; LIMIT is in bytes, % of RAM, or 0 for defaults
- --no-adjust if compression settings exceed the memory usage limit,
- give an error instead of adjusting the settings downwards
- Custom filter chain for compression (alternative for using presets):
- --lzma1[=OPTS] LZMA1 or LZMA2; OPTS is a comma-separated list of zero or
- --lzma2[=OPTS] more of the following options (valid values; default):
- preset=PRE reset options to a preset (0-9[e])
- dict=NUM dictionary size (4KiB - 1536MiB; 8MiB)
- lc=NUM number of literal context bits (0-4; 3)
- lp=NUM number of literal position bits (0-4; 0)
- pb=NUM number of position bits (0-4; 2)
- mode=MODE compression mode (fast, normal; normal)
- nice=NUM nice length of a match (2-273; 64)
- mf=NAME match finder (hc3, hc4, bt2, bt3, bt4; bt4)
- depth=NUM maximum search depth; 0=automatic (default)
- --x86[=OPTS] x86 BCJ filter (32-bit and 64-bit)
- --powerpc[=OPTS] PowerPC BCJ filter (big endian only)
- --ia64[=OPTS] IA-64 (Itanium) BCJ filter
- --arm[=OPTS] ARM BCJ filter (little endian only)
- --armthumb[=OPTS] ARM-Thumb BCJ filter (little endian only)
- --sparc[=OPTS] SPARC BCJ filter
- Valid OPTS for all BCJ filters:
- start=NUM start offset for conversions (default=0)
- --delta[=OPTS] Delta filter; valid OPTS (valid values; default):
- dist=NUM distance between bytes being subtracted
- from each other (1-256; 1)
- Other options:
- -q, --quiet suppress warnings; specify twice to suppress errors too
- -v, --verbose be verbose; specify twice for even more verbose
- -Q, --no-warn make warnings not affect the exit status
- --robot use machine-parsable messages (useful for scripts)
- --info-memory display the total amount of RAM and the currently active
- memory usage limits, and exit
- -h, --help display the short help (lists only the basic options)
- -H, --long-help display this long help and exit
- -V, --version display the version number and exit
- With no FILE, or when FILE is -, read standard input.
- Report bugs to <lasse.collin@tukaani.org> (in English or Finnish).
- XZ Utils home page: <https://tukaani.org/xz/>
- /opt/cu/apps # cat /proc/cpuinfo
- processor : 0
- model name : ARMv7 Processor rev 1 (v7l)
- BogoMIPS : 1987.37
- Features : half fastmult edsp tls
- CPU implementer : 0x41
- CPU architecture: 7
- CPU variant : 0x4
- CPU part : 0xc09
- CPU revision : 1
- Hardware : ZTE ZX27912X (Device Tree)
- Revision : 0000
- Serial : 0000000000000000
后面就简单了， 压缩后的文件为76.1 MB (79,894,956 字节)
- /opt/cu/apps/busybox1 dd if=/dev/mtd0 |/opt/cu/apps/xz-v5 -M32MB>/upgtempfile/mtd0.xz （边拷贝边压缩，用-M32MB参数是因为LZMA压缩特别占用内存，如果不限制使用内存，光猫在拷贝过程后期可能因为内存溢出而重启，我这款就重启了2次，后来加了参数就ok了）
方法二：
在以上过程中我还参考网上信息Linux 下的dd命令使用详解以及dd if=/dev/zero of=的含义发现有另外一种方式使用netcat（简称nc）传数据，这是个非常有名的工具在busybox中集成了它的简化版，busybox windows版本也可以在 https://frippery.org/files/busybox/ 下载到
1、先在windows中执行命令：（接收数据端）
- busybox nc -l -p 12345 >mtd0
- /opt/cu/apps/busybox1 dd if=/dev/mtd0 | /opt/cu/apps/busybox1 nc 192.168.1.2 12345
最后留下文件：
busybox for windows
busybox for Arm 使用静态编译，文件较大，但无需另外的库支撑，直接使用
xz for Arm 使用静态编译，文件较大，但无需另外的库支撑，直接使用
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发表于 2024-1-4 00:51:51