reliable udp example
lazarus / 38-Networking and Web Programming

----------------------------------------------------------------------
xinyiman · 2019-01-17 13:09

Hi, for my cross-platform project i search a rudp library for lazarus.
Any suggestion?

----------------------------------------------------------------------
Thaddy · 2019-01-17 13:44

Call me old fashioned but reliable UDP is called TCP.....<grin>
Although in most countries the current connections are so stable it
doesn't really matter.

You may want to read this:
https://en.wikipedia.org/wiki/User_Datagram_Protocol

Most sockets libraries have good UDP support. So anything will do....
Remember: UDP is a fire and forget weapon.....

----------------------------------------------------------------------
xinyiman · 2019-01-17 13:59

Yes, I think so, but I was told that RUDP is more powerful than TCP in
terms of speed.

----------------------------------------------------------------------
correa.elias · 2019-01-17 14:39

Theres Enet (http://enet.bespin.org/) its used in games like this:
http://sauerbraten.org/
Its a C library that can be compiled to a DLL (or SO or Dylib) and
used by freepascal.
The bindings for this library are included by default in fpc (look
into FPC_FOLDER/packages/libenet/examples).

----------------------------------------------------------------------
dsiders · 2019-01-17 14:52

Quote from: correa.elias on January 17, 2019, 03:39:38 pmThe bindings
for this library are included by default in fpc (look into
FPC_FOLDER/packages/libenet/examples).

They're not present in FPC 3.0.4 for Windows.

----------------------------------------------------------------------
xinyiman · 2019-01-17 14:58

Quote from: correa.elias on January 17, 2019, 03:39:38 pmTheres Enet
(http://enet.bespin.org/) its used in games like this:
http://sauerbraten.org/
Its a C library that can be compiled to a DLL (or SO or Dylib) and
used by freepascal.
The bindings for this library are included by default in fpc (look
into FPC_FOLDER/packages/libenet/examples).
Yes, but when i build exaxmples return this

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i Compile
Project, Target: serverapp: Exit code 256, Errors: 3, Hints:
2serverapp.pp(21,52) Hint: Parameter "BroadcastMsg" not
usedserverapp.pp(21,80) Hint: Parameter "BroadcastChannel" not
usedError: linker: Undefined symbols for architecture x86_64:Error:
linker:   "_enet_address_set_host", referenced from: 
"_enet_deinitialize", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_DESTROY in uenetclass.o 
"_enet_host_broadcast", referenced from:      _UENETCLASS$_$TENETCLASS
_$__$$_BROADCASTMSG$BYTE$POINTER$LONGINT$TENETPACKETFLAGS$BOOLEAN$$BOO
LEAN in uenetclass.o     
_UENETCLASS$_$TENETCLASS_$__$$_PROCESSMSG$$BOOLEAN in uenetclass.o 
"_enet_host_connect", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_CONNECT$ANSISTRING$WORD$$BOOLEAN in
uenetclass.o  "_enet_host_create", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_INITHOST$$BOOLEAN in uenetclass.o 
"_enet_host_destroy", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_DEINITHOST in uenetclass.o 
"_enet_host_flush", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_FLUSHMSG in uenetclass.o 
"_enet_host_service", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_CONNECT$ANSISTRING$WORD$$BOOLEAN in
uenetclass.o      _UENETCLASS$_$TENETCLASS_$__$$_PROCESSMSG$$BOOLEAN
in uenetclass.o  "_enet_initialize", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_CREATE$WORD$BOOLEAN$$TENETCLASS in
uenetclass.o  "_enet_packet_create", referenced from:      _UENETCLASS
$_$TENETCLASS_$__$$_SENDMSG$BYTE$POINTER$LONGINT$TENETPACKETFLAGS$BOOL
EAN$$BOOLEAN in uenetclass.o      _UENETCLASS$_$TENETCLASS_$__$$_SENDM
SGEVENTPEER$POINTER$LONGINT$TENETPACKETFLAGS$BOOLEAN$$BOOLEAN in
uenetclass.o      _UENETCLASS$_$TENETCLASS_$__$$_BROADCASTMSG$BYTE$POI
NTER$LONGINT$TENETPACKETFLAGS$BOOLEAN$$BOOLEAN in uenetclass.o     
_UENETCLASS$_$TENETCLASS_$__$$_PROCESSMSG$$BOOLEAN in uenetclass.o 
"_enet_packet_destroy", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_PROCESSMSG$$BOOLEAN in uenetclass.o 
"_enet_peer_disconnect", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_DISCONNECT$BOOLEAN$$BOOLEAN in
uenetclass.o  "_enet_peer_disconnect_now", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_DISCONNECT$BOOLEAN$$BOOLEAN in
uenetclass.o  "_enet_peer_ping", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_PING in uenetclass.o 
"_enet_peer_reset", referenced from:     
_UENETCLASS$_$TENETCLASS_$__$$_CONNECT$ANSISTRING$WORD$$BOOLEAN in
uenetclass.o  "_enet_peer_send", referenced from:      _UENETCLASS$_$T
ENETCLASS_$__$$_SENDMSG$BYTE$POINTER$LONGINT$TENETPACKETFLAGS$BOOLEAN$
$BOOLEAN in uenetclass.o      _UENETCLASS$_$TENETCLASS_$__$$_SENDMSGEV
ENTPEER$POINTER$LONGINT$TENETPACKETFLAGS$BOOLEAN$$BOOLEAN in
uenetclass.old: symbol(s) not found for architecture x86_64An error
occurred while linking Error: Error while linking

----------------------------------------------------------------------
Leledumbo · 2019-01-20 11:49

Quote from: xinyiman on January 17, 2019, 03:58:35 pmYes, but when i
build exaxmples return this
...
Error: linker: Undefined symbols for architecture x86_64:
Bitness mismatch. Ensure your enet library is 64-bit as your code. It
builds smoothly on my 64-bit Manjaro Linux.

----------------------------------------------------------------------
Thaddy · 2019-01-20 13:09

Quote from: xinyiman on January 17, 2019, 02:59:11 pmYes, I think so,
but I was told that RUDP is more powerful than TCP in terms of speed.
Well, https://en.wikipedia.org/wiki/Reliable_User_Datagram_Protocol
tells me it is not a standard and as such you would need to implement
both client and server yourself.
Since it is not a standard, I can not help you this time.

----------------------------------------------------------------------
DonAlfredo · 2019-01-20 13:52

Perhaps this can help.
https://github.com/BeRo1985/rnl

----------------------------------------------------------------------
diego bertotti · 2019-12-04 12:57

Quote from: dsiders on January 17, 2019, 03:52:57 pmQuote from:
correa.elias on January 17, 2019, 03:39:38 pmThe bindings for this
library are included by default in fpc (look into
FPC_FOLDER/packages/libenet/examples).

They're not present in FPC 3.0.4 for Windows.


i found it on "lazarus/fpc/examples/"