Skip to content

Added handler for HTTP2/PRI #178

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Beeram12 wants to merge 2 commits into
base: main
Choose a base branch
from
Open

Added handler for HTTP2/PRI #178

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
fa920e4
Added handler for HTTP2/PRI
Beeram12 Mar 8, 2025
76d70b2
Formatted the code and improved error conditionality
Beeram12 Mar 11, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 8 additions & 1 deletion protocols/protocols.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,14 @@ func MapTCPProtocolHandlers(log interfaces.Logger, h interfaces.Honeypot) map[st
return nil
}
// poor mans check for HTTP request
httpMap := map[string]bool{"GET ": true, "POST": true, "HEAD": true, "OPTI": true, "CONN": true}
httpMap := map[string]bool{
"GET ": true,
"POST": true,
"HEAD": true,
"OPTI": true,
"CONN": true,
"PRI ": true,
}
if _, ok := httpMap[strings.ToUpper(string(snip))]; ok {
return tcp.HandleHTTP(ctx, bufConn, md, log, h)
}
Expand Down
18 changes: 18 additions & 0 deletions protocols/tcp/http.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import (
"encoding/hex"
"encoding/json"
"fmt"
"io"
"log/slog"
"net"
"net/http"
Expand Down Expand Up @@ -124,6 +125,23 @@ func HandleHTTP(ctx context.Context, conn net.Conn, md connection.Metadata, logg
}
}()

reader := bufio.NewReader(conn)
preface, err := reader.Peek(24)
if err != nil {
if err == io.EOF {
logger.Debug("Client disconneted early")
return nil
}
return fmt.Errorf("failed to peek HTTP/2 preface: %w", err)
}
if bytes.Equal(preface, []byte("PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n")) {
settingsFrame := []byte("\x00\x00\x00\x04\x00\x00\x00\x00\x00")
if _, err := conn.Write(settingsFrame); err != nil {
logger.Error("Failed to write HTTP/2 response", slog.String("error", err.Error()))
}
return conn.Close()
}

req, err := http.ReadRequest(bufio.NewReader(conn))
if err != nil {
return fmt.Errorf("failed to read the HTTP request: %w", err)
Expand Down