First public commit

1 files changed, 80 insertions, 0 deletions

diff --git a/internal/mappings/mappings.go b/internal/mappings/mappings.go
new file mode 100644
index 0000000..fba7201
--- /dev/null
+++ b/internal/mappings/mappings.go
@@ -0,0 +1,80 @@
+// Copyright 2018 ThousandEyes Inc.
+//
+// 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 mappings
+
+import (
+	"net"
+	"regexp"
+	"strings"
+)
+
+// Script holds information related to a booting script.
+type Script struct {
+	Name        string
+	Environment string
+	Params      map[string]interface{}
+}
+
+// NetworkMap struct contains an association between a CIDR network and a
+// Script.
+type NetworkMap struct {
+	Network *net.IPNet
+	Script  *Script
+}
+
+// HostnameMap struct contains an association between a hostname regular
+// expression and a Script.
+type HostnameMap struct {
+	Hostname *regexp.Regexp
+	Script   *Script
+}
+
+// FindScriptForHostname receives a HostnameMap and a string (that can be a
+// regular expression), and tries to find a match in that map. If it finds
+// a match, it returns the associated script.
+func FindScriptForHostname(maps []HostnameMap, hostname string) (script *Script, ok bool) {
+	for _, m := range maps {
+		if m.Hostname.MatchString(hostname) {
+			return m.Script, true
+		}
+	}
+	return nil, false
+}
+
+// FindScriptForNetwork receives a NetworkMap and an IP and tries to see if
+// that IP belongs to any of the configured networks. If it finds a match,
+// it returns the associated script.
+func FindScriptForNetwork(maps []NetworkMap, ip string) (script *Script, ok bool) {
+	for _, m := range maps {
+		if m.Network.Contains(net.ParseIP(ip)) {
+			return m.Script, true
+		}
+	}
+	return nil, false
+}
+
+func (s Script) String() string {
+	var result = s.Name + " : { "
+	elems := []string{}
+	if s.Environment != "" {
+		elems = append(elems, "environment: "+s.Environment)
+	}
+	for key, value := range s.Params {
+		elems = append(elems, key+": "+value.(string))
+	}
+	result += strings.Join(elems, ", ") + " }"
+
+	return result
+}