Kristoffer Dalby feb15365b5 Split code into modules
This is a massive commit that restructures the code into modules:

db/
    All functions related to modifying the Database

types/
    All type definitions and methods that can be exclusivly used on
    these types without dependencies

policy/
    All Policy related code, now without dependencies on the Database.

policy/matcher/
    Dedicated code to match machines in a list of FilterRules

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
2023-05-26 12:24:50 +02:00

109 lines
2.5 KiB
Go

package types
import (
"database/sql/driver"
"encoding/json"
"errors"
"fmt"
"net/netip"
"tailscale.com/tailcfg"
)
var ErrCannotParsePrefix = errors.New("cannot parse prefix")
// This is a "wrapper" type around tailscales
// Hostinfo to allow us to add database "serialization"
// methods. This allows us to use a typed values throughout
// the code and not have to marshal/unmarshal and error
// check all over the code.
type HostInfo tailcfg.Hostinfo
func (hi *HostInfo) Scan(destination interface{}) error {
switch value := destination.(type) {
case []byte:
return json.Unmarshal(value, hi)
case string:
return json.Unmarshal([]byte(value), hi)
default:
return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
}
}
// Value return json value, implement driver.Valuer interface.
func (hi HostInfo) Value() (driver.Value, error) {
bytes, err := json.Marshal(hi)
return string(bytes), err
}
type IPPrefix netip.Prefix
func (i *IPPrefix) Scan(destination interface{}) error {
switch value := destination.(type) {
case string:
prefix, err := netip.ParsePrefix(value)
if err != nil {
return err
}
*i = IPPrefix(prefix)
return nil
default:
return fmt.Errorf("%w: unexpected data type %T", ErrCannotParsePrefix, destination)
}
}
// Value return json value, implement driver.Valuer interface.
func (i IPPrefix) Value() (driver.Value, error) {
prefixStr := netip.Prefix(i).String()
return prefixStr, nil
}
type IPPrefixes []netip.Prefix
func (i *IPPrefixes) Scan(destination interface{}) error {
switch value := destination.(type) {
case []byte:
return json.Unmarshal(value, i)
case string:
return json.Unmarshal([]byte(value), i)
default:
return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
}
}
// Value return json value, implement driver.Valuer interface.
func (i IPPrefixes) Value() (driver.Value, error) {
bytes, err := json.Marshal(i)
return string(bytes), err
}
type StringList []string
func (i *StringList) Scan(destination interface{}) error {
switch value := destination.(type) {
case []byte:
return json.Unmarshal(value, i)
case string:
return json.Unmarshal([]byte(value), i)
default:
return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
}
}
// Value return json value, implement driver.Valuer interface.
func (i StringList) Value() (driver.Value, error) {
bytes, err := json.Marshal(i)
return string(bytes), err
}