Did anyone tried to modify free5gc to use http2 instead of http1.1 with h2c?

nathalie21005 · February 9, 2022, 9:28pm

Hi,

Anyone knows if free5gc support http2 multiplexing feature?
or Someone tried to modify free5gc to use http2 instead of http1.1 with h2c?

Thank you

abousselmi · February 9, 2022, 9:28pm

Hi @nathalie21005

I think this is in continuity with your previous question.

Free5GC implements both h2c and h2. If we take an the example of the AUSF, you can see here:

github.com

free5gc/http2_util/blob/210de71e32434b980cefc9a708453307d4c2dd64/server.go#L20


	"time"
	"github.com/pkg/errors"
	"golang.org/x/net/http2"
	"golang.org/x/net/http2/h2c"
)
// NewServer returns a server instance with HTTP/2.0 and HTTP/2.0 cleartext support
// If this function cannot open or create the secret log file,
// **it still returns server instance** but without the secret log and error indication
func NewServer(bindAddr string, preMasterSecretLogPath string, handler http.Handler) (server *http.Server, err error) {
	if handler == nil {
		return nil, errors.New("server needs handler to handle request")
	}
	h2Server := &http2.Server{
		// TODO: extends the idle time after re-use openapi client
		IdleTimeout: 1 * time.Millisecond,
	}
	server = &http.Server{
		Addr:    bindAddr,

that it implements http, h2c and h2 servers. The code looks very much like this example:

github.com

thrawn01/h2c-golang-example/blob/cafa2960ca5df81100b61a1785b37f5ed749b87d/cmd/server/main.go#L25


	}
	fmt.Printf("ERROR: %s: %s\n", msg, err)
	os.Exit(1)
}
func main() {
	H2CServerUpgrade()
	//H2CServerPrior()
}
// This server supports "H2C upgrade" and "H2C prior knowledge" along with
// standard HTTP/2 and HTTP/1.1 that golang natively supports.
func H2CServerUpgrade() {
	h2s := &http2.Server{}
	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, %v, http: %v", r.URL.Path, r.TLS == nil)
	})
	server := &http.Server{
		Addr:    "0.0.0.0:1010",

which states that using this implementation you will end up with a server that supports basically everything.

I hope this helps.

nathalie21005 · February 9, 2022, 9:28pm

How can I run the server in h2c or h2 if it’s container, while I don’t have access to the server only after I run the docker compose so the address of the NF which means the server will be in use. Any idea?!

abousselmi · February 9, 2022, 9:28pm

I don’t fully get your question. Can you provide more details ? Are you trying to run the h2 mode ? If it’s the case, I think you need to change the scheme from http to https in the config files.

Nevertheless, if the docker version is inconvenient for you you can always use the all-in-one install method described here: https://github.com/free5gc/free5gc/wiki/Installation

nathalie21005 · February 9, 2022, 9:28pm

No I am trying to run the server as h2c not h2 but I don’t have to the container without running the docker-compose (docker-compose up). And once I run the compose, I cannot access same address of NF to run the server using h2c because the address is in use with the run of docker.

Thank you so much for your support and help.

abousselmi · February 9, 2022, 9:28pm

Ok, I see, I suggest that you remove the NF that you want to replace from the docker-compose.yaml file, configure all the other NFs/containers to run in host network mode (Use host networking | Docker Documentation), run your substitute NF and then launch the rest of the NFs using compose. You may also want to verify NFs dependencies because the stack could fail if you remove the NRF for example (other NFs depend on it).

nathalie21005 · February 9, 2022, 9:28pm

Hi @abousselmi,

Thank you for your support, I was able to run the container with your suggested code.
Do you have any idea, if we can run all the docker-compose using h2c (to enable http/2)?

Thank you again.