天邑光猫TEWA-872G，想增加原生固件不支持的DHCP静态分配功能。初步测试了下，dhcpd运行时读取/var/udhcpd/udhcpd.conf配置文件，因此，在配置文件中增加static_lease条目就可以实现DHCP静态分配功能。
但关键问题是除/data、/plugin这两个路径下的文件之外，对其他文件的修改均在重启后失效。
翻了翻/etc/rc3.d/*路径下的启动脚本，似乎也都没有利用价值。其中，/etc/rc3.d/S25mount-fs这个脚本创建了/var/udhcpd/目录，/etc/rc3.d/S66smd这个脚本启动主程序/bin/smd，/bin/smd这个程序调用了/lib/libcms_core.so中的方法，根据用户配置生成/var/udhcpd/udhcpd.conf，同时拉起dhcpd进程。
想替换rootfs，dump出了mtd11:”rootfs_ubifs”的内容，用unsquashfs解压后，原封不动按原参数打包回去，报一堆错，大小也跟原来的不一样，不敢往回写。
卡在这儿了，求大佬指点思路。
/proc/mtd:
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dev: size erasesize namemtd0: 05c00000 00020000 "rootfs"mtd1: 05c00000 00020000 "rootfs_update"mtd2: 00400000 00020000 "data"mtd3: 00100000 00020000 "nvram"mtd4: 05c00000 00020000 "image"mtd5: 05c00000 00020000 "image_update"mtd6: 10000000 00020000 "dummy1"mtd7: 10000000 00020000 "dummy2"mtd8: 03c00000 00020000 "plug"mtd9: 00200000 00020000 "readonly"mtd10: 00400000 00020000 "log"mtd11: 0538e000 0001f000 "rootfs_ubifs"mtd12: 0001f000 0001f000 "METADATA"mtd13: 0001f000 0001f000 "METADATACOPY"mtd14: 002ea79e 0001f000 "filestruct_full.bin"mtd15: 002e8000 0001f000 "data" |
mount:
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/dev/root on / type squashfs (ro,relatime)devtmpfs on /dev type devtmpfs (rw,relatime,mode=0755)proc on /proc type proc (rw,relatime)tmpfs on /var type tmpfs (rw,relatime,size=420k)tmpfs on /mnt type tmpfs (rw,relatime,size=16k,mode=0755)sysfs on /sys type sysfs (rw,relatime)debugfs on /sys/kernel/debug type debugfs (rw,relatime)devpts on /dev/pts type devpts (rw,relatime,mode=600)ubi1:data on /data type ubifs (rw,relatime)/dev/mtdblock10 on /log type jffs2 (rw,relatime)/dev/mtdblock9 on /readonly type jffs2 (ro,relatime)/dev/mtdblock8 on /plugin type jffs2 (rw,relatime) |
ps:
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PID USER VSZ STAT COMMAND 1 admin 1580 S /sbin/init 2 admin 0 SW [kthreadd] 3 admin 0 SW [ksoftirqd/0] 5 admin 0 SW< [kworker/0:0H] 6 admin 0 SW [kworker/u4:0] 7 admin 0 SW [rcu_preempt] 8 admin 0 SW [rcu_sched] 9 admin 0 SW [rcu_bh] 10 admin 0 SW [migration/0] 11 admin 0 SW [watchdog/0] 12 admin 0 SW [watchdog/1] 13 admin 0 SW [migration/1] 14 admin 0 SW [ksoftirqd/1] 16 admin 0 SW< [kworker/1:0H] 17 admin 0 SW< [khelper] 18 admin 0 SW [kdevtmpfs] 138 admin 0 SW< [writeback] 140 admin 0 SW< [crypto] 142 admin 0 SW< [bioset] 144 admin 0 SW< [kblockd] 164 admin 0 SW [skb_free_task] 165 admin 0 SW< [linkwatch] 185 admin 0 SWN [kswapd0] 186 admin 0 SW [fsnotify_mark] 307 admin 0 SW< [kpsmoused] 319 admin 0 SW [btnhandler0] 345 admin 0 SW< [ipv6_addrconf] 359 admin 0 SW< [deferwq] 367 admin 0 SW [ubi_bgt0d] 411 admin 0 SW [kworker/0:9] 417 admin 0 SW [kworker/0:13] 548 admin 0 SW [ubi_bgt1d] 580 admin 0 SW [ubifs_bgt1_0] 590 admin 0 SWN [jffs2_gcd_mtd10] 744 admin 0 SW [recycle_sysb] 745 admin 0 SW [feed_sysb] 758 admin 0 SW [spdsvc_timer_th] 790 admin 0 SW [fc_evt] 791 admin 0 SW [fc_timer] 792 admin 0 SW [bcmFlwStatsTask] 815 admin 0 SW [kworker/u4:2] 860 admin 0 SW [bcmsw_rx] 867 admin 0 SW [dyn_meter_poll] 966 admin 0 SW< [TAPItimers] 967 admin 0 SW< [TAPIevents] 974 admin 0 SW [TAPIdxs_int] 1137 admin 0 SW [kbdmf_shell] 1187 admin 0 SW< [cfg80211] 1263 admin 0 SW [wl0-kthrd] 1266 admin 0 SW [wfd0-thrd] 1275 admin 0 DW [avs] 1283 admin 0 SW [wl1-kthrd] 1287 admin 0 SW [wfd1-thrd] 1296 admin 0 DW [avs] 1657 admin 2852 S /usr/sbin/dbus-daemon --config-file /share/dbus-1/sy 1665 admin 0 SWN [jffs2_gcd_mtd8] 1669 admin 13020 S hlogd 1686 admin 31980 S hbusdaemon -r 1703 admin 20288 S /bin/smd 1704 admin 13144 S ssk 1741 admin 55352 S hghttpd 2121 admin 14480 S wand 2136 admin 42144 S miscd 2145 admin 13724 S mdmd 2154 admin 12972 S hghal 2160 admin 25076 S natived 2390 admin 7000 S dnsproxy 2391 admin 12080 S sntp -s time.windows.com -s time.nist.gov -s ntp.ten 2398 admin 7196 S mcpd 2403 admin 5308 S dhcpd 2440 admin 10848 S rastatus6 2536 admin 12580 S gwd -m 0 2648 admin 10856 S portLoopDetect 2990 admin 32668 S wlmngr2 -m 0 2991 admin 24808 S osgid -m 0 2992 admin 12184 S tydaemon -m 0 2993 admin 13096 S ssk_ty -m 0 2994 admin 12076 S wlssk_ty -m 0 2995 admin 12164 S wanhal -m 0 2997 admin 13876 S wlanmonitor -m 0 3034 admin 15568 S consoled 3105 admin 1580 D cat /dev/rgs_logger 3108 admin 0 DW [Pon] 3119 admin 30520 S omcid -m 0 start 3219 admin 6484 S pppd -c ppp0.2 -i veip0.2 -u xxx -k -y -1 3354 admin 4068 S dhcpc -f -i veip0.1 -r 10.69.72.249 -a 172.20.65.245 3757 admin 4824 S dhcp6c -c /var/dhcp6c_ppp0.2.conf ppp0.2__veip0.2 4250 admin 4832 S dhcp6s -c /var/dhcp6s.conf br0 4251 admin 1956 S radvd /bin/radvd -C /var/radvd.conf 4447 admin 0 DW [mirror_task] 4487 admin 244m S /usr/local/jre/bin/java -noverify -Xcompactalways -D 4606 admin 5996 S /bin/wlevt2 4951 admin 3064 S eapd 4953 admin 3052 S ceventd 4957 admin 3032 S debug_monitor 4993 admin 3280 S acsd2 5172 admin 6008 S hostapd /tmp/wl0_hapd.conf 5214 admin 6008 S hostapd /tmp/wl1_hapd.conf 5216 admin 30016 S wps_pbcd 5223 admin 2936 S toad 5433 admin 20516 S mobileapp -m 0 6514 admin 0 SW [kworker/1:0]10988 admin 0 SW [kworker/1:1]11056 admin 14336 S telnetd -m 011057 admin 14360 S telnetd -m 011092 admin 1580 S sh12125 admin 0 SW [kworker/1:2]12766 admin 1580 S {dumpsysinfo.sh} /bin/sh /opt/scripts/dumpsysinfo.sh12899 admin 1580 R ps |
原文始发于看雪社区（mb_zamynquy）：给光猫增加DHCP静态分配功能
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