| Golang ioctl sample |
Reseller Verkkokauppa.com https://www.verkkokauppa.com/fi/product/65504/hbvcf/Fuj-tech-Drop-HD-IP-kamera sold as "Fuj:tech Drop HD ‐IP-kamera"
OEM is Shenzhen Smarteye Digital Electronics Co., Ltd http://www.smarteyegroup.com/
Product: Wansview NCM700GC
This gist will show how to setup Raspbian Stretch as a headless Bluetooth A2DP audio sink. This will allow your phone, laptop or other Bluetooth device to play audio wirelessly through a Rasperry Pi.
A quick search will turn up a plethora of tutorials on setting up A2DP on the Raspberry Pi. However, I felt this gist was necessary because this solution is:
| # Goto android source code root and then execute following commands | |
| # Keep the logcat.log in the root | |
| export ANDROID_BUILD_TOP=$(pwd) | |
| ./external/selinux/prebuilts/bin/audit2allow -p out/target/product/{devicename}/root/sepolicy < logcat.log | |
| # Copy the generated rules in respective files in the device tree |
| # Those rules protect HTTP/HTTPS services for both IPv4 and IPv6 sources as such: | |
| # 1. Prevent a /32 IPv4 or /64 IPv6 to open more than 10 HTTPS?/TCP connections per second (the limit is high, but this still shield against some attacks) — DROP TCP packets in this case, to avoid generating egress traffic sending a RST | |
| # 2. Limit ingress bandwidth to HTTPS? services to 32KB/sec (adjust to your needs, in my case it is used to shield a WebSocket backend against incoming WebSocket message floods) | |
| # 3. Limit the number of simultaneous ongoing connections to HTTPS? to 40 (also, high limit, adjust to your needs) | |
| # The protections those rules offer: | |
| # 1. Prevent crypto-DOS (ie. a client that proceed too many key exchanges and thus exhaust server CPU) | |
| # 2. Prevent WebSocket floodings (eg. I use this for Socket.IO, which has no efficient way to rate-limit received messages before they get parsed) | |
| # 3. Prevent ephemeral TCP port exhaustion due to a client holding too many TCP connections | |
| # 4. Prevent IPv6 rotation attac |
Migrated with additional information to my blog: https://msfjarvis.dev/posts/understanding-and-resolving-selinux-denials-on-android/
Denial in question
avc: denied { read write } for pid=29059 comm="i.tetherservice" name="ipa" dev="tmpfs" ino=11991 scontext=u:r:system_app:s0 tcontext=u:object_r:ipa_dev:s0 tclass=chr_file permissive=0
sepolicy fix
This guide is unmaintained and was created for a specific workshop in 2017. It remains as a legacy reference. Use at your own risk.
Workshop Instructor:
This workshop is distributed under a CC BY-SA 4.0 license.
| Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options | |
| This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full. | |
| usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}… | |
| Getting help: | |
| -h — print basic options | |
| -h long — print more options | |
| -h full — print all options (including all format and codec specific options, very long) |