picoquicdemo on separate hosts

[alexj0l]

Hi everyone,

is it possible to run picoquicdemo as "server" on one host and then run it from another host as client to test the performance on link between them? Sadly I didn't found anything useful for my case.

Thanks in advance.

[alexj0l]

Small update: I figured it out but now I'm getting an error on client side.
I want to test the maximal throughput achieved by picoquic by running
./picoquicdemo -D <server_name> 4443 /20000000 on client and
./picoquicdemo -p 4443 on server side.
The server is running without any problems, but the client gets the message

Starting Picoquic (v1.1.0.0) connection to server = <server_name>, port = 4443
Files not saved to disk (-D, no_disk)
Testing scenario: </200000000>
Careful: NULL SNI is incompatible with HTTP 3. Expect errors!
Max stream id bidir remote before start = 0 (0)
Starting client connection. Version = 1, I-CID: 822cc5d9fe5b8484
Max stream id bidir remote after start = -4 (0)
Waiting for packets.
Client port (AF=2): 57910.
Negotiated ALPN: h3
Almost ready!

Connection established. Version = 1, I-CID: 822cc5d9fe5b8484, verified: 1
Cannot send GET command for stream(0): /200000000
Received a request to close the connection.
Client exit with code = -1

[huitema]

The message "NULL SNI is incompatible with HTTP 3. Expect errors!" is because you are not providing a server name. In TLS 1.3, the server name is used to verify the server certificate and prevent man-in-the-middle attacks. If you do not have a server name, things will break, just like the message says. The solution is to set an arbitrary host name using the "-n" option, as in:

./picoquicdemo -n test -D <server_name> 4443 /20000000

[alexj0l]

@huitema Thanks a lot! Is there a way to revert de load direction? Instead of download to make upload (other than swapping client and server)?

[huitema]

The demo server supports a POST function. It is somewhat tested, but not documented very well. It probably needs some debugging.

[alexj0l]

One more question: By specifying -G reno is the client using Reno or NewReno?

[huitema]

NewReno.

[alexj0l]

Thanks! May I ask which version of BBR is supported by picodemoquic? The first one or V2?

[huitema]

First one, but with a series of changes somewhat similar to 2, e.g., reaction to large losses or to ECN marks.

[huitema]

Closing the issue, after documenting the solution in the wiki