1 files changed, 66 insertions, 0 deletions
diff --git a/config/server.go b/config/server.go
new file mode 100644
index 0000000..7883b33
--- /dev/null
+++ b/config/server.go
@@ -0,0 +1,66 @@
+package config
+
+import (
+	"errors"
+)
+
+// Permissions map. Each SSH user has a list of permissions which
+// log files it is allowed to follow and which ones not.
+type Permissions struct {
+	// The default user permissions.
+	Default []string
+	// The per user special permissions.
+	Users map[string][]string
+}
+
+// ServerConfig represents the server configuration.
+type ServerConfig struct {
+	// The SSH server bind port.
+	SSHBindAddress string
+	// The max amount of concurrent user connection allowed to connect to the server.
+	MaxConnections int
+	// The max amount of concurrent cats per server.
+	MaxConcurrentCats int
+	// The max amount of concurrent tails per server.
+	MaxConcurrentTails int
+	// The user permissions.
+	Permissions Permissions `json:",omitempty"`
+	// The mapr log format
+	MapreduceLogFormat string `json:",omitempty"`
+	// The default path of the server host key
+	HostKeyFile string
+	// The host key size in bits
+	HostKeyBits int
+}
+
+// Create a new default server configuration.
+func newDefaultServerConfig() *ServerConfig {
+	defaultPermissions := []string{"^/.*"}
+	defaultBindAddress := "0.0.0.0"
+
+	return &ServerConfig{
+		SSHBindAddress:     defaultBindAddress,
+		MaxConnections:     10,
+		MaxConcurrentCats:  2,
+		MaxConcurrentTails: 50,
+		HostKeyFile:        "./cache/ssh_host_key",
+		HostKeyBits:        4096,
+		Permissions: Permissions{
+			Default: defaultPermissions,
+		},
+	}
+}
+
+// ServerUserPermissions retrieves the permission set of a given user.
+func ServerUserPermissions(userName string) (permissions []string, err error) {
+	permissions = Server.Permissions.Default
+	if p, ok := Server.Permissions.Users[userName]; ok {
+		permissions = p
+	}
+
+	if len(permissions) == 0 {
+		err = errors.New("Empty set of permission, user won't be able to open any files")
+	}
+
+	return
+}