[openresty] UDP socket send broadcast

rpaprocki · 2014-09-16T07:56:08+00:00

https://github.com/krisajenkins/yesqlYeSQL is pretty cool so maybe Openresty needs one too. Embedding queries into code is pretty bonkers and YeSQL resolves...

[openresty] UDP socket send broadcast

rpaprocki

Hello!

It seems that attempting to send broadcast UDP packets via udpsock:send
fails:

connect(3, {sa_family=AF_INET, sin_port=htons(12345),
sin_addr=inet_addr("x.x.x.255")}, 16) = -1 EACCES (Permission denied)

(and the corresponding ngx error log):

2014/09/15 16:53:59 [crit] 21286#0: connect() failed (13: Permission
denied), context: ngx.timer


Based on
http://stackoverflow.com/questions/11457676/python-socket-error-errno-13-permission-denied,
it seems that this is a function of the socket object trying to send
unicast packets; Lua seems to have an option to set the broadcast flag,
but based on http://wiki.nginx.org/HttpLuaModule#tcpsock:setoption, it
seems this isn't currently supported. Is this analysis correct? Any
plans to implement this in the near future?

agentzh

Hello!

On Mon, Sep 15, 2014 at 4:56 PM, Robert Paprocki wrote:
> Based on
> http://stackoverflow.com/questions/11457676/python-socket-error-errno-13-permission-denied,
> it seems that this is a function of the socket object trying to send
> unicast packets; Lua seems to have an option to set the broadcast flag,
> but based on http://wiki.nginx.org/HttpLuaModule#tcpsock:setoption, it
> seems this isn't currently supported. Is this analysis correct?

Yes, correct.

> Any
> plans to implement this in the near future?
>

Patches welcome :)

Regards,
-agentzh