79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
/*
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* Copyright 2022 The Dragonfly Authors
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*
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* 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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*/
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package rpc
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import (
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"context"
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"fmt"
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"net"
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"strconv"
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"strings"
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"github.com/mdlayher/vsock"
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"google.golang.org/grpc"
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"d7y.io/dragonfly/v2/pkg/dfnet"
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)
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// VsockDialer is the dialer for vsock, it expects `address` to be in dfnet.NetAddr.GetEndpoint()
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// format, that is "vsock://cid:port"
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func VsockDialer(_ctx context.Context, address string) (net.Conn, error) {
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addrStr := strings.TrimPrefix(address, dfnet.VsockEndpointPrefix)
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addr := strings.Split(addrStr, ":")
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if len(addr) != 2 {
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return nil, fmt.Errorf("invalid vsock address (%s), expected %scid:port", address, dfnet.VsockEndpointPrefix)
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}
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cid, err := strconv.ParseUint(addr[0], 10, 32)
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if err != nil {
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return nil, fmt.Errorf("failed to convert %q to vsock cid: %w", addr[0], err)
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}
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port, err := strconv.ParseUint(addr[1], 10, 32)
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if err != nil {
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return nil, fmt.Errorf("failed to convert %q to vsock port: %w", addr[1], err)
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}
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conn, err := vsock.Dial(uint32(cid), uint32(port), nil)
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if err != nil {
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return nil, fmt.Errorf("failed to dial vsock %v:%v, address %s: %w", uint32(cid), uint32(port), address, err)
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}
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return conn, nil
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}
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// If `addrs` are all vsock addresses, add rpc.VsockDialer to DialOption, and return error if addrs
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// have mixed vsock and other connection types.
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func VsockDialerOption(addrs []dfnet.NetAddr, opts []grpc.DialOption) ([]grpc.DialOption, error) {
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var prevType dfnet.NetworkType
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hasVsock := false
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for n, a := range addrs {
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if a.Type != dfnet.VSOCK {
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prevType = a.Type
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continue
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}
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hasVsock = true
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if n > 0 && prevType != dfnet.VSOCK {
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return nil, fmt.Errorf("addrs(%v) have mixed vsock and other types", addrs)
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}
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prevType = a.Type
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}
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dialOpts := opts
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if hasVsock {
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dialOpts = append(opts, grpc.WithContextDialer(VsockDialer))
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}
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return dialOpts, nil
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}
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