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ipn/{ipnlocal,localapi}: add localapi handler to dial/proxy file PUTs

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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-04-06 13:38:47 -07:00
committed by Brad Fitzpatrick
parent 3089081349
commit 1f99f889e1
4 changed files with 138 additions and 15 deletions
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50
ipn/ipnlocal/peerapi_macios_ext.go
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@@ -7,6 +7,7 @@
package ipnlocal
import (
"errors"
"fmt"
"log"
"net"
@@ -20,6 +21,7 @@ import (
func init() {
initListenConfig = initListenConfigNetworkExtension
peerDialControlFunc = peerDialControlFuncNetworkExtension
}
// initListenConfigNetworkExtension configures nc for listening on IP
@@ -33,16 +35,7 @@ func initListenConfigNetworkExtension(nc *net.ListenConfig, ip netaddr.IP, st *i
nc.Control = func(network, address string, c syscall.RawConn) error {
var sockErr error
err := c.Control(func(fd uintptr) {
v6 := strings.Contains(address, "]:") || strings.HasSuffix(network, "6") // hacky test for v6
proto := unix.IPPROTO_IP
opt := unix.IP_BOUND_IF
if v6 {
proto = unix.IPPROTO_IPV6
opt = unix.IPV6_BOUND_IF
}
sockErr = unix.SetsockoptInt(int(fd), proto, opt, tunIf.Index)
sockErr = bindIf(fd, network, address, tunIf.Index)
log.Printf("peerapi: bind(%q, %q) on index %v = %v", network, address, tunIf.Index, sockErr)
})
if err != nil {
@@ -52,3 +45,40 @@ func initListenConfigNetworkExtension(nc *net.ListenConfig, ip netaddr.IP, st *i
}
return nil
}
func bindIf(fd uintptr, network, address string, ifIndex int) error {
v6 := strings.Contains(address, "]:") || strings.HasSuffix(network, "6") // hacky test for v6
proto := unix.IPPROTO_IP
opt := unix.IP_BOUND_IF
if v6 {
proto = unix.IPPROTO_IPV6
opt = unix.IPV6_BOUND_IF
}
return unix.SetsockoptInt(int(fd), proto, opt, ifIndex)
}
func peerDialControlFuncNetworkExtension(b *LocalBackend) func(network, address string, c syscall.RawConn) error {
b.mu.Lock()
defer b.mu.Unlock()
st := b.prevIfState
pas := b.peerAPIServer
index := -1
if st != nil && pas != nil && pas.tunName != "" {
if tunIf, ok := st.Interface[pas.tunName]; ok {
index = tunIf.Index
}
}
return func(network, address string, c syscall.RawConn) error {
if index == -1 {
return errors.New("failed to find TUN interface to bind to")
}
var sockErr error
err := c.Control(func(fd uintptr) {
sockErr = bindIf(fd, network, address, index)
})
if err != nil {
return err
}
return sockErr
}
}