cmd: Remove table/ usage in policy.go

Signed-off-by: Satoshi Fujimoto <satoshi.fujimoto7@gmail.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/api/policy.go b/api/policy.go
new file mode 100644
index 00000000..7296f012
--- /dev/null
+++ b/api/policy.go
@@ -0,0 +1,79 @@
+// Copyright (C) 2018 Nippon Telegraph and Telephone Corporation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gobgpapi
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/osrg/gobgp/packet/bgp"
+)
+
+var (
+	repexpCommunity      = regexp.MustCompile("(\\d+.)*\\d+:\\d+")
+	regexpLargeCommunity = regexp.MustCompile("\\d+:\\d+:\\d+")
+)
+
+func ParseCommunityRegexp(arg string) (*regexp.Regexp, error) {
+	i, err := strconv.ParseUint(arg, 10, 32)
+	if err == nil {
+		return regexp.Compile(fmt.Sprintf("^%d:%d$", i>>16, i&0x0000ffff))
+	}
+	if repexpCommunity.MatchString(arg) {
+		return regexp.Compile(fmt.Sprintf("^%s$", arg))
+	}
+	for i, v := range bgp.WellKnownCommunityNameMap {
+		if strings.Replace(strings.ToLower(arg), "_", "-", -1) == v {
+			return regexp.Compile(fmt.Sprintf("^%d:%d$", i>>16, i&0x0000ffff))
+		}
+	}
+	exp, err := regexp.Compile(arg)
+	if err != nil {
+		return nil, fmt.Errorf("invalid community format: %s", arg)
+	}
+	return exp, nil
+}
+
+func ParseExtCommunityRegexp(arg string) (bgp.ExtendedCommunityAttrSubType, *regexp.Regexp, error) {
+	var subtype bgp.ExtendedCommunityAttrSubType
+	elems := strings.SplitN(arg, ":", 2)
+	if len(elems) < 2 {
+		return subtype, nil, fmt.Errorf("invalid ext-community format([rt|soo]:<value>)")
+	}
+	switch strings.ToLower(elems[0]) {
+	case "rt":
+		subtype = bgp.EC_SUBTYPE_ROUTE_TARGET
+	case "soo":
+		subtype = bgp.EC_SUBTYPE_ROUTE_ORIGIN
+	default:
+		return subtype, nil, fmt.Errorf("unknown ext-community subtype. rt, soo is supported")
+	}
+	exp, err := ParseCommunityRegexp(elems[1])
+	return subtype, exp, err
+}
+
+func ParseLargeCommunityRegexp(arg string) (*regexp.Regexp, error) {
+	if regexpLargeCommunity.MatchString(arg) {
+		return regexp.Compile(fmt.Sprintf("^%s$", arg))
+	}
+	exp, err := regexp.Compile(arg)
+	if err != nil {
+		return nil, fmt.Errorf("invalid large-community format: %s", arg)
+	}
+	return exp, nil
+}