20151214_jeffrey - silenceuncrio/diary GitHub Wiki

Index

0950 幫忙 IoS 小組測量 BLE Beacon 距離
1015 review diary and write index
1040 write engineering notebook
1100 mail from Jammy - Re: [Share]issues for openHAB gateway solution.
1300 survey 如何來進行對 openWrt 的 uhttpd 的 experiments
1335 在 JS9331 寫 CGI
- include cgilib via menuconfig and make
1515 利用 web 刷写新的固件
1530 寫 CGI - pritf
1610 寫 CGI - #include <cgi.h>
1740 寫 CGI - issue: 不要呼叫 cgiFree()
1750 跟 Jammy 聊一下解開潛在心結

0950

一早來先幫忙 IoS 小組測量 BLE Beacon 距離
目前官方的小板子最遠只到 20 公尺左右

1015

review diary and write index

1040

write engineering notebook

1100

Re: [Share]issues for openHAB gateway solution.

Jammy 於 2015/12/13 上午 03:07 寫道:

Dear Jeffrey,

我想回饋的是，在我進昇頻前，Pioneer有叫我survey一下smart gateway。
所以我當時有找十來篇的paper來看(IEEE explorer上的)，
印象中這些協定都有看到有人用(smart gateway的通訊方式也是各方亂舞....)
我禮拜一可以試著把這些paper找出來(應該在公司)

我不建議在這個時候做這樣的survey，
我認為這時候已經晚了，
整個系統架構已經定義過半，
而且就算時光倒轉..重來一次，我也不認為業界應該做這種學校才存在的研究，
其實這句是違心之論...但至少我們這種規模的公司是這樣。

況且各協議的比較是一個很大的研究題目，
(更不提之後協議改版後的勝負結果)

我認為我們現在應該做的

搭一個最簡單的RESTful benchmark機制，定義我們的系統一次可以存在多少訊息流量(定義空間中的sensor/reactor or control box)。

如果uhttpd的測試不需要額外的effort，Nginx需要，那暫時忽略Nginx。

如果http RESTful完全不敷使用，也就是說control center可接受sensor/reactor數量遠小於smart room/smart office使用，這個時候我們才可以認定我們的設計是違背我們最早的規格定義)，才該在這些研究中的協議尋找合適的，或是自行定義(http+REST/http+self-defined/???+???/...etc)。

把協議比較這回事放在心裡，即使目前不明朗，有一天他們也會分出勝負，到時不能不知道有這個東西。

Best Regards,
Jammy
在 Sat, 12 Dec 2015 11:27:32 +0800, jeffrey [email protected]寫道:

Jammy 這封信只寄給我而已

剛剛才看到

難怪他早上來問我啥論文的事
還有怎麼測壓力測試的事情

我當時還搞不清楚怎麼回事

1300

先 survey 一下如何來進行對 openWrt 的 uhttpd 的 experiments

蠻快就有了目標, 因為大部分網友都推薦這一套 Apache JMeter™

1335

下載了 JMeter 之後發現自己很多擔心都是多餘的
已經可以直接在 JS9331 寫 CGI 來做測試了

直接來寫 event.cgi 好了

我需要確認 JS9331 上有 cgi 和 json 這兩個 library
Coji 不在了...
自己來吧

一步一步

在自己電腦上新增兩個資料夾

C:\Users\JEFFREY\Desktop\si_projects\js9331_event_cgi
D:\ubuntu_share\js9331_event_cgi

新增 Source Insight project

project name: js9331_event_cgi
project data files: C:\Users\JEFFREY\Desktop\si_projects\js9331_event_cgi
project source directory: D:\ubuntu_share\js9331_event_cgi

在我的 JS9331 開發環境 Ubuntu 中的 openwrt 目錄下

jeffrey@jeffrey-virtual-machine:~/openwrt$ make menuconfig

Library 選單按 Enter 進入
往下拉會看到 cgilib
不過實在不知道選 built-in 或 module

.config - OpenWrt Configuration
 ──────────────────────────────────────────────────────────────────────────────
  ┌─────────────────────────────── Libraries ───────────────────────────────┐
  │  Arrow keys navigate the menu.  <Enter> selects submenus --->.          │  
  │  Highlighted letters are hotkeys.  Pressing <Y> includes, <N> excludes, │  
  │  <M> modularizes features.  Press <Esc><Esc> to exit, <?> for Help, </> │  
  │  for Search.  Legend: [*] built-in  [ ] excluded  <M> module  < >       │  
  │ ┌────^(-)─────────────────────────────────────────────────────────────┐ │  
  │ │        ...                                                          │ │  
  │ │    < > ccid........................... Generic USB CCID smart card r│ │  
  │ │    < > cgilib................................................ Simple│ │  
  │ │    < > check....................................... Unit testing fra│ │  
  │ │        ...                                                          │ │  
  │ └────v(+)─────────────────────────────────────────────────────────────┘ │  
  ├─────────────────────────────────────────────────────────────────────────┤  
  │        <Select>    < Exit >    < Help >    < Save >    < Load >         │  
  └─────────────────────────────────────────────────────────────────────────┘

一直拉到最下面都沒看到 jsonc 的 library

.config - OpenWrt Configuration
 ──────────────────────────────────────────────────────────────────────────────
  ┌─────────────────────────────── Libraries ───────────────────────────────┐
  │  Arrow keys navigate the menu.  <Enter> selects submenus --->.          │  
  │  Highlighted letters are hotkeys.  Pressing <Y> includes, <N> excludes, │  
  │  <M> modularizes features.  Press <Esc><Esc> to exit, <?> for Help, </> │  
  │  for Search.  Legend: [*] built-in  [ ] excluded  <M> module  < >       │  
  │ ┌────^(-)─────────────────────────────────────────────────────────────┐ │  
  │ │        ...                                                          │ │  
  │ │    < > libjson...................... javascript object notation (com│ │  
  │ │    -*- libjson-c..................................... javascript obj│ │  
  │ │    < > libldns............................ A library to simplify DNS│ │  
  │ │        ...                                                          │ │  
  │ └────v(+)─────────────────────────────────────────────────────────────┘ │  
  ├─────────────────────────────────────────────────────────────────────────┤  
  │        <Select>    < Exit >    < Help >    < Save >    < Load >         │  
  └─────────────────────────────────────────────────────────────────────────┘

倒是有看到 libjson-c 前面打了 *
應該是 built-in 的意思

索性連 cgilib 也選 built-in, 這要按 Y

直接敲 make

jeffrey@jeffrey-virtual-machine:~/openwrt$ make menuconfig
configuration written to .config

*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.

jeffrey@jeffrey-virtual-machine:~/openwrt$ make
 make[1] world
 make[2] target/compile
 make[3] -C target/linux compile
 make[2] package/cleanup
 make[2] package/compile
 make[3] -C package/libs/toolchain compile
 make[3] -C package/libs/libnl-tiny compile
 make[3] -C package/libs/libjson-c compile
 make[3] -C package/utils/lua compile
 make[3] -C package/libs/libubox compile
 make[3] -C package/system/ubus compile
 make[3] -C package/system/uci compile
 make[3] -C package/network/config/netifd compile
 make[3] -C package/system/opkg host-compile
 make[3] -C package/system/ubox compile
 make[3] -C package/libs/lzo compile
 make[3] -C package/libs/zlib compile
 make[3] -C package/libs/ncurses compile
 make[3] -C package/libs/ncurses compile
 make[3] -C package/utils/util-linux compile
 make[3] -C package/utils/ubi-utils compile
 make[3] -C package/system/procd compile
 make[3] -C package/utils/jsonfilter compile
 make[3] -C package/base-files compile
 make[3] -C package/system/fstools compile
 make[3] -C package/boot/uboot-envtools compile
 make[3] -C package/libs/gettext compile
 make[3] -C package/libs/libiconv compile
 make[3] -C package/libs/libtool compile
 make[3] -C package/libs/cyassl compile
 make[3] -C package/libs/ocf-crypto-headers compile
 make[3] -C package/libs/openssl compile
 make[3] -C package/libs/polarssl compile
 make[3] -C package/libs/ustream-ssl compile
 make[3] -C package/network/services/uhttpd compile
 make[3] -C package/network/utils/iwinfo compile
 make[3] -C package/utils/lua host-compile
 make[3] -C package/utils/px5g compile
 make[3] -C package/firmware/linux-firmware compile
 make[3] -C package/kernel/linux compile
 make[3] -C package/network/utils/iptables compile
 make[3] -C package/network/config/firewall compile
 make[3] -C feeds/luci/contrib/package/luci compile
 make[3] -C feeds/luci/contrib/package/freifunk-common compile
 make[3] -C package/libs/libreadline compile
 make[3] -C package/network/services/samba36 compile
 make[3] -C feeds/luci/contrib/package/luci-addons compile
 make[3] -C feeds/oldpackages/libs/cgilib compile
 make[3] -C feeds/packages/libs/libgpg-error compile
 make[3] -C feeds/packages/libs/libgcrypt compile
 make[3] -C feeds/oldpackages/utils/ntfs-3g compile
 make[3] -C feeds/oldpackages/net/ser2net compile
 make[3] -C feeds/packages/libs/alsa-lib compile
 make[3] -C feeds/packages/utils/alsa-utils compile
 make[3] -C feeds/packages/utils/attr compile
 make[3] -C feeds/packages/utils/bzip2 compile
 make[3] -C package/libs/libpcap compile
 make[3] -C package/libs/uclient compile
 make[3] -C feeds/packages/net/cshark compile
 make[3] -C feeds/packages/libs/faad2 compile
 make[3] -C feeds/packages/libs/speex compile
 make[3] -C feeds/packages/multimedia/ffmpeg compile
 make[3] -C feeds/packages/libs/flac compile
 make[3] -C feeds/packages/libs/libffi host-compile
 make[3] -C package/libs/gettext host-compile
 make[3] -C package/libs/libiconv host-compile
 make[3] -C feeds/packages/libs/glib2 host-compile
 make[3] -C feeds/packages/libs/libffi compile
 make[3] -C feeds/packages/libs/glib2 compile
 make[3] -C feeds/packages/libs/libaudiofile compile
 make[3] -C feeds/packages/libs/libid3tag compile
 make[3] -C feeds/packages/libs/libmad compile
 make[3] -C feeds/packages/libs/libmms compile
 make[3] -C feeds/packages/libs/libmpdclient compile
 make[3] -C feeds/packages/libs/libogg compile
 make[3] -C feeds/packages/libs/libsndfile compile
 make[3] -C feeds/packages/libs/libvorbis compile
 make[3] -C feeds/packages/libs/libvorbisidec compile
 make[3] -C feeds/packages/utils/minicom compile
 make[3] -C feeds/packages/sound/mpc compile
 make[3] -C package/network/utils/curl compile
 make[3] -C feeds/packages/sound/mpd compile
 make[3] -C feeds/packages/net/vsftpd compile
 make[3] -C package/kernel/gpio-button-hotplug compile
 make[3] -C package/network/services/hostapd compile
 make[3] -C package/network/utils/iw compile
 make[3] -C package/kernel/mac80211 compile
 make[3] -C package/kernel/w1-gpio-custom compile
 make[3] -C package/libs/uclibc++ compile
 make[3] -C package/network/config/swconfig compile
 make[3] -C package/network/ipv6/odhcp6c compile
 make[3] -C package/libs/gmp compile
 make[3] -C package/libs/nettle compile
 make[3] -C package/network/services/dnsmasq compile
 make[3] -C package/network/services/dropbear compile
 make[3] -C package/network/services/odhcpd compile
 make[3] -C package/network/utils/linux-atm compile
 make[3] -C package/network/utils/resolveip compile
 make[3] -C package/network/services/ppp compile
 make[3] -C package/network/utils/iperf compile
 make[3] -C package/system/mtd compile
 make[3] -C package/system/opkg compile
 make[3] -C package/utils/busybox compile
 make[3] -C package/utils/fuse compile
 make[2] package/install
 make[3] package/preconfig
 make[2] target/install
 make[3] -C target/linux install
 make[3] -C target/toolchain install
 make[2] package/index
jeffrey@jeffrey-virtual-machine:~/openwrt$

make 過了
然後咧

JS9331 開發板 OpenWrt 入門教程
...
4.3.6. 编译 OpenWrt 源码
...
编译完成后的 OpenWrt 固件可以在“openwrt /bin/ar71xx”下找到。

jeffrey@jeffrey-virtual-machine:~/openwrt/bin/ar71xx$ ls
md5sums
openwrt-ar71xx-generic-root.squashfs
openwrt-ar71xx-generic-root.squashfs-64k
openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin
openwrt-ar71xx-generic-uImage-gzip.bin
openwrt-ar71xx-generic-uImage-lzma.bin
openwrt-ar71xx-generic-vmlinux.bin
openwrt-ar71xx-generic-vmlinux.elf
openwrt-ar71xx-generic-vmlinux.gz
openwrt-ar71xx-generic-vmlinux.lzma
openwrt-ar71xx-generic-vmlinux-lzma.elf
OpenWrt-Toolchain-ar71xx-for-mips_34kc-gcc-4.8-linaro_uClibc-0.9.33.2.tar.bz2
packages
jeffrey@jeffrey-virtual-machine:~/openwrt/bin/ar71xx$

書上說 openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin 就是 OpenWrt 固件

那我要怎麼把這個固件丟到 JS9331 上呢?

JS9331 開發板使用手冊
...
3. 开发板固件镜像烧录说明

這裡有說明

我看我就用最簡單的

3.1.1 openwrt 网络烧写

在自己電腦新增資料夾
D:\ubuntu_share\js9331_firmware

然後將 openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin 複製到該資料夾去

jeffrey@jeffrey-virtual-machine:~/openwrt/bin/ar71xx$ cp openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin /mnt/hgfs/share/js9331_firmware/

就照著手冊上寫的幹了

1515

還好 web 介面有重新叫我輸入帳號密碼

回顧我剛剛做了甚麼事情

進 menuconfig 按 Y 選了 cgilib
<*> cgilib................................................ Simple

Exit and Save 之後敲了 make

jeffrey@jeffrey-virtual-machine:~/openwrt$ make
 make[1] world
 make[2] target/compile
 make[3] -C target/linux compile
 make[2] package/cleanup
 make[2] package/compile
 make[3] -C package/libs/toolchain compile
 make[3] -C package/libs/libnl-tiny compile
 make[3] -C package/libs/libjson-c compile
         ...
 make[3] -C feeds/oldpackages/libs/cgilib compile
         ...
 make[3] -C package/utils/fuse compile
 make[2] package/install
 make[3] package/preconfig
 make[2] target/install
 make[3] -C target/linux install
 make[3] -C target/toolchain install
 make[2] package/index
jeffrey@jeffrey-virtual-machine:~/openwrt$

然後我得到了 openWrt 固件一個 openwrt-ar71xx-generic-tl-wr720n-v3-squashfs-sysupgrade.bin

然後直接利用現成的 web interface 刷写新的固件

等了兩三分鐘重新登入了 web

有驚無險

1530

來寫 CGI 吧

main.c

#include <stdio.h>

int
main(void) {

    printf("event.cgi: hello world\n");

    return 0;
}

jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ mips-openwrt-linux-gcc main.c -o event.cgi

上傳 event.cgi 到 /tmp 去

root@JoySince:/# cd /tmp/
root@JoySince:/tmp# ls
TZ                hosts             luci-sessions     state
dhcp.leases       lock              overlay           sysinfo
dnsmasq.d         log               resolv.conf
etc               luci-indexcache   resolv.conf.auto
event.cgi         luci-modulecache  run
root@JoySince:/tmp# chmod 755 event.cgi
root@JoySince:/tmp# ls
TZ                hosts             luci-sessions     state
dhcp.leases       lock              overlay           sysinfo
dnsmasq.d         log               resolv.conf
etc               luci-indexcache   resolv.conf.auto
event.cgi         luci-modulecache  run
root@JoySince:/tmp#

記得修改權限

root@JoySince:/tmp# ./event.cgi
event.cgi: hello world

好
成功的一小步

複製到 CGI 目錄下

root@JoySince:/tmp# cp event.cgi /www/cgi-bin/
root@JoySince:/tmp# ls /www/cgi-bin/
event.cgi  luci

網址列敲 http://192.168.1.251/cgi-bin/event.cgi 得到

Bad Gateway

The process did not produce any response

算了
開始套 cgilib 了

main.c

#include <cgi.h>

s_cgi *cgi;

int
main(void) {

    cgi = cgiInit();

    cgiSetType("application/json");
    cgiHeader();

    printf("{\"hello\": \"world\"}");
    cgiFree (cgi);

    return 0;
}

出問題了

jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ mips-openwrt-linux-gcc main.c -o event.cgi
main.c:2:17: fatal error: cgi.h: No such file or directory
 #include <cgi.h>
                 ^
compilation terminated.

1610

從 579 的 compile 平台找一些點子

mips-openwrt-linux-uclibc-gcc -L/home/jeffrey/UGW-5.4/proscend/apps/webcgi/../icos -s -L./ -L/home/jeffrey/UGW-5.4/staging_dir/target-mips_r2_uClibc-0.9.30.1_vrx288_gw_he_vdsl_lte/usr/lib -Wl,-rpath,/tmp -licos -lcgi -ljson-c -o z_lan_vif.cgi z_lan_vif.o
mips-openwrt-linux-uclibc-strip z_lan_vif.cgi
cp z_lan_vif.cgi www/cgi-bin/
Compile wan_more_conn.c ...
mips-openwrt-linux-uclibc-gcc -std=gnu99 -Wall -Wstrict-prototypes -D__ICOS__ -D_GNU_SOURCE -D__DEBUG__ -O0 -DMCSVTAG="\"\""  -D_PDM_SHDSL -D_PDM_HTB -D_MODEL_ID=5790 -D_BRAND_ID=50 -D_MODEL_NAME="P-793H v3" -D_DATECODE=20151023  -I/home/jeffrey/UGW-5.4/proscend/apps/webcgi/../icos/include -I/home/jeffrey/UGW-5.4/proscend/apps/webcgi/include -I/home/jeffrey/UGW-5.4/proscend/apps/webcgi/cgilib-0.7 -I/home/jeffrey/UGW-5.4/staging_dir/target-mips_r2_uClibc-0.9.30.1_vrx288_gw_he_vdsl_lte/usr/include -c -o wan_more_conn.o wan_more_conn.c

在 JS9331 的開發平台台發現了一堆 library

jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ ls /home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib/
glib-2.0                 libgmodule-2.0.so           libntfs-3g.so.85
iptables                 libgmodule-2.0.so.0         libntfs-3g.so.85.0.0
libasound.so             libgmodule-2.0.so.0.4101.0  libogg.a
libasound.so.2           libgmp.a                    libogg.so
libasound.so.2.0.0       libgmp.so                   libogg.so.0
libatm.a                 libgmp.so.10                libogg.so.0.8.2
libatm.so                libgmp.so.10.2.0            libpanel.a
libatm.so.1              libgobject-2.0.a            libpanel.so
libatm.so.1.0.0          libgobject-2.0.so           libpanel.so.5
libattr.a                libgobject-2.0.so.0         libpanel.so.5.9
libattr.so               libgobject-2.0.so.0.4101.0  libpcap.a
libattr.so.1             libgpg-error.a              libpcap.so
libattr.so.1.1.2448      libgpg-error.so             libpcap.so.1.3
libaudiofile.a           libgpg-error.so.0           libpcap.so.1.3.0
libaudiofile.so          libgpg-error.so.0.10.0      libpolarssl.so
libaudiofile.so.1        libgthread-2.0.a            libpolarssl.so.1.3.9
libaudiofile.so.1.0.0    libgthread-2.0.so           libpolarssl.so.7
libavcodec.a             libgthread-2.0.so.0         libpostproc.a
libavcodec.so            libgthread-2.0.so.0.4101.0  libpostproc.so
libavcodec.so.54         libhistory.a                libpostproc.so.52
libavcodec.so.54.23.100  libhistory.so               libpostproc.so.52.0.100
libavdevice.a            libhistory.so.6             libreadline.a
libavdevice.so           libhistory.so.6.2           libreadline.so
libavdevice.so.54        libhogweed.a                libreadline.so.6
libavdevice.so.54.0.100  libhogweed.so               libreadline.so.6.2
libavfilter.a            libhogweed.so.2             libsndfile.a
libavfilter.so           libhogweed.so.2.5           libsndfile.so
libavfilter.so.2         libiconv-stub               libsndfile.so.1
libavfilter.so.2.77.100  libid3tag.so                libsndfile.so.1.0.25
libavformat.a            libid3tag.so.0              libspeex.a
libavformat.so           libid3tag.so.0.3.0          libspeexdsp.a
libavformat.so.54        libintl-stub                libspeexdsp.so
libavformat.so.54.6.100  libip4tc.so                 libspeexdsp.so.1
libavutil.a              libip4tc.so.0               libspeexdsp.so.1.5.0
libavutil.so             libip4tc.so.0.1.0           libspeex.so
libavutil.so.51          libip6tc.so                 libspeex.so.1
libavutil.so.51.54.100   libip6tc.so.0               libspeex.so.1.5.0
libblkid.a               libip6tc.so.0.1.0           libssl.a
libblkid.so              libiptc.so                  libssl.so
libblkid.so.1            libiptc.so.0                libssl.so.1.0.0
libblkid.so.1.1.0        libiptc.so.0.0.0            libswresample.a
libblobmsg_json.so       libiwinfo.so                libswresample.so
libbz2.so                libjson.a                   libswresample.so.0
libbz2.so.1.0            libjson-c.a                 libswresample.so.0.15.100
libbz2.so.1.0.6          libjson-c.so                libswscale.a
libcgi.a                 libjson-c.so.2              libswscale.so
libcgi.so                libjson-c.so.2.0.1          libswscale.so.2
libcgi.so.1              libjson_script.so           libswscale.so.2.1.100
libcgi.so.1.0.0          libjson.so                  libubi-utils.a
libcrypto.a              libjson.so.0                libubox.a
libcrypto.so             libjson.so.0.1.0            libubox.so
libcrypto.so.1.0.0       libltdl.a                   libubus.so
libcurl.a                libltdl.so                  libucimap.a
libcurl.so               libltdl.so.7                libuci.so
libcurl.so.4             libltdl.so.7.3.0            libuClibc++-0.2.4.so
libcurl.so.4.3.0         liblua.a                    libuClibc++.a
libcurses.a              liblualib.so                libuClibc++.so
libcurses.so             liblua.so                   libuClibc++.so.0
libcyassl.so             liblua.so.5.1.5             libuclient.so
libcyassl.so.5           liblzo2.a                   libulockmgr.a
libcyassl.so.5.1.0       liblzo2.so                  libulockmgr.so
libfaad.a                liblzo2.so.2                libulockmgr.so.1
libfaad.so               liblzo2.so.2.0.0            libulockmgr.so.1.0.1
libfaad.so.2             libmad.a                    libustream-ssl.so
libfaad.so.2.0.0         libmad.so                   libuuid.a
libffi.a                 libmad.so.0                 libuuid.so
libffi.so                libmad.so.0.2.1             libuuid.so.1
libffi.so.6              libmenu.a                   libuuid.so.1.3.0
libffi.so.6.0.1          libmenu.so                  libvalidate.so
libFLAC.a                libmenu.so.5                libvorbis.a
libFLAC.so               libmenu.so.5.9              libvorbisenc.a
libFLAC.so.8             libmms.a                    libvorbisenc.so
libFLAC.so.8.2.0         libmms.so                   libvorbisenc.so.2
libform.a                libmms.so.0                 libvorbisenc.so.2.0.10
libform.so               libmms.so.0.0.2             libvorbisfile.a
libform.so.5             libmount.a                  libvorbisfile.so
libform.so.5.9           libmount.so                 libvorbisfile.so.3
libfuse.a                libmount.so.1               libvorbisfile.so.3.3.6
libfuse.so               libmount.so.1.1.0           libvorbisidec.a
libfuse.so.2             libmpdclient.a              libvorbisidec.so
libfuse.so.2.9.0         libmpdclient.so             libvorbisidec.so.1
libgcrypt.a              libmpdclient.so.2           libvorbisidec.so.1.0.3
libgcrypt.so             libmpdclient.so.2.0.5       libvorbis.so
libgcrypt.so.20          libncurses.a                libvorbis.so.0
libgcrypt.so.20.0.1      libncurses.so               libvorbis.so.0.4.7
libgio-2.0.a             libncurses.so.5             libxtables.so
libgio-2.0.so            libncurses.so.5.9           libxtables.so.10
libgio-2.0.so.0          libnettle.a                 libxtables.so.10.0.0
libgio-2.0.so.0.4101.0   libnettle.so                libz.a
libglib-2.0.a            libnettle.so.4              libz.so
libglib-2.0.so           libnettle.so.4.7            libz.so.1
libglib-2.0.so.0         libnl-tiny.so               libz.so.1.2.8
libglib-2.0.so.0.4101.0  libntfs-3g.a                lua
libgmodule-2.0.a         libntfs-3g.so               pkgconfig

所以我在使用 mips-openwrt-linux-gcc 的時候
應該使用 -L 來告訴它去哪邊找函式庫

我也應該告訴 mips-openwrt-linux-gcc 取哪邊找 cgi.h 才對

jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ ls /home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include/
af_vfs.h     etip.h        libavfilter    mac80211-backport  speex
alsa         faad.h        libavformat    mad.h              termcap.h
atmarpd.h    ffi.h         libavutil      menu.h             term.h
atmarp.h     ffitarget.h   libiptc        mp4ff.h            tremor
atmd.h       FLAC          libipulog      mp4ffint.h         ubi-media.h
atm.h        form.h        libltdl        mpd                ubi-user.h
atmsap.h     fuse          libmms         ncurses_dll.h      ubus_common.h
attr         fuse.h        libmount       ncurses.h          ubusmsg.h
audiofile.h  gcrypt.h      libnl-tiny     neaacdec.h         uci_blob.h
aupvlist.h   gio-unix-2.0  libopkg        net                uci_config.h
blkid        glib-2.0      libpostproc    nettle             uci.h
bzlib.h      gmp.h         libswresample  ntfs-3g            ucimap.h
cgi.h        gpg-error.h   libswscale     ogg                uClibc++
crypto       id3tag.h      libubi.h       openssl            ulockmgr.h
curl         ip6tables.h   libubi-tiny.h  panel.h            unctrl.h
cursesapp.h  iptables      libubox        pcap               uuid
cursesf.h    iptables.h    libubus.h      pcap-bpf.h         vorbis
curses.h     iwinfo        lnum_config.h  pcap.h             xtables.h
cursesm.h    iwinfo.h      ltdl.h         pcap-namedb.h      xtables-version.h
cursesp.h    json          luaconf.h      polarssl           zconf.h
cursesw.h    json-c        lua.h          pppd               zlib.h
cursslk.h    lauxlib.h     lualib.h       readline
cyassl       libavcodec    lzo            sndfile.h
eti.h        libavdevice   mac80211       sndfile.hh

來做個總結

我想在 /mnt/hgfs/share/js9331_event_cgi 目錄下
使用 mips-openwrt-linux-gcc 來編譯 main.c 使其產生執行檔 event.cgi

/mnt/hgfs/share/js9331_event_cgi/main.c

#include <stdio.h>
#include <cgi.h>
s_cgi *cgi;

int main(void) {
    cgi = cgiInit();
    cgiSetType("application/json");
    cgiHeader();
    printf("{\"hello\": \"world\"}");
    cgiFree (cgi);

    return 0;
}

我需要告訴 mips-openwrt-linux-gcc 三件事

-I/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include/
-L/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib/
-lcgi

command 敲起來會像下面這一坨

mips-openwrt-linux-uclibc-gcc -I/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include/ -L/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib/ -lcgi -o event.cgi main.c

哈哈

jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ mips-openwrt-linux-uclibc-gcc -I/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include/ -L/home/jeffrey/openwrt/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib/ -lcgi -o event.cgi main.c
jeffrey@jeffrey-virtual-machine:/mnt/hgfs/share/js9331_event_cgi$ ls
event.cgi  main_0.c  main.c

直接上傳到 JS9331 的 /www/cgi-bin 目錄

root@JoySince:/www/cgi-bin# ls
event.cgi  luci

網址列敲 http://192.168.1.251/cgi-bin/event.cgi 得到

Bad Gateway

The process did not produce any response

shit

1740

Debug 的過程得到詭異的結論

/mnt/hgfs/share/js9331_event_cgi/main.c

#include <stdio.h>
#include <cgi.h>
s_cgi *cgi;

int main(void) {
    cgi = cgiInit();
    cgiSetType("application/json");
    cgiHeader();
    printf("{\"hello\": \"world\"}");
//    cgiFree (cgi);
    return 0;
}

不要呼叫 cgiFree()
問題就解決了這實在蠻詭異的

1750

剛剛有跟 Jammy 聊了一下

Jammy 當兵時看了一些和 IoT Protocol 相關學術論文
Jammy 沒有去看 CoAP 或 MQTT 的規格
聊了一下 Jammy 就開心了
Jammy 表示他要趕快將 mantis wiki 的 smart lighting 部分寫完給 Aaron 用

我承諾了一些事

送他一台 nodemcu 小車