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85 lines
2.1 KiB
85 lines
2.1 KiB
// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package protocol
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import (
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"context"
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"crypto/tls"
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"net"
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"github.com/pkg/errors"
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"github.com/bboozzoo/mconnect/logger"
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"github.com/bboozzoo/mconnect/protocol/packet"
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)
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type Connection struct {
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conn *tls.Conn
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}
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type Configuration struct {
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Cert *tls.Certificate
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Identity *packet.Identity
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}
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func Dial(ctx context.Context, where string, conf *Configuration) (*Connection, error) {
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log := logger.FromContext(ctx)
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dialer := net.Dialer{}
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conn, err := dialer.DialContext(ctx, "tcp", where)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to dial %s", where)
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}
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log.Debugf("connected to %v", conn.RemoteAddr())
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e := packet.NewEncoder(conn)
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if err := e.Encode(packet.NewIdentity(conf.Identity)); err != nil {
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return nil, errors.Wrapf(err, "failed to send identity")
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}
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log.Debugf("identity sent")
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// upgrade to secure connection
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tlsConf := tls.Config{
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InsecureSkipVerify: true,
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Certificates: []tls.Certificate{*conf.Cert},
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}
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tlsConn := tls.Server(conn, &tlsConf)
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if err := tlsConn.Handshake(); err != nil {
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log.Errorf("TLS handshake failed: %v", err)
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return nil, err
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}
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return &Connection{conn: tlsConn}, nil
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}
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func (c *Connection) Close() error {
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if c.conn != nil {
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c.conn.Close()
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}
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return nil
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}
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func (c *Connection) Receive() (*packet.Packet, error) {
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d := packet.NewDecoder(c.conn)
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var p packet.Packet
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if err := d.Decode(&p); err != nil {
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return nil, err
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}
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return &p, nil
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}
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func (c *Connection) Send(p packet.Packet) error {
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e := packet.NewEncoder(c.conn)
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return e.Encode(&p)
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}
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