initial sip implementation

1 files changed, 43 insertions, 0 deletions

diff --git a/pkg/auth/sip2/telnet.go b/pkg/auth/sip2/telnet.go
new file mode 100644
index 0000000..b5abd5f
--- /dev/null
+++ b/pkg/auth/sip2/telnet.go
@@ -0,0 +1,43 @@
+package sip2
+
+import (
+	"github.com/reiver/go-telnet"
+)
+
+// TODO depends on how terminator is configured -- take it from config file
+// const terminator string = "\r\n"
+const terminator string = "\r"
+
+func telnetRead(conn *telnet.Conn) (out string) {
+	var buffer [1]byte
+	recvData := buffer[:]
+	var n int
+	var err error
+
+	for {
+		n, err = conn.Read(recvData)
+		if n <= 0 || err != nil {
+			break
+		} else {
+			out += string(recvData)
+		}
+		if len(out) > 1 && out[len(out)-len(terminator):] == terminator {
+			break
+		}
+	}
+	return out
+}
+
+func telnetSend(conn *telnet.Conn, command string) {
+	var commandBuffer []byte
+	for _, char := range command {
+		commandBuffer = append(commandBuffer, byte(char))
+	}
+
+	var crlfBuffer [2]byte = [2]byte{'\r', '\n'}
+
+	crlf := crlfBuffer[:]
+
+	conn.Write(commandBuffer)
+	conn.Write(crlf)
+}