add the 'ead' package (emergency access daemon),

which can provide remote access to your device, even if the ip
and firewall settings are broken

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13738 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 134 insertions, 0 deletions

diff --git a/package/ead/src/ead.h b/package/ead/src/ead.h
new file mode 100644
index 0000000000..3bd64f9d57
--- /dev/null
+++ b/package/ead/src/ead.h
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __EAD_H
+#define __EAD_H
+
+#define EAD_DEBUGLEVEL	1
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifndef MAXSALTLEN
+#define MAXSALTLEN 32
+#endif
+
+#define EAD_PORT	56026UL
+#define EAD_MAGIC	3671771902UL
+#define EAD_CMD_TIMEOUT	10
+
+#define EAD_MAX_IV_INCR	128
+
+/* request/response types */
+/* response id == request id + 1 */
+enum ead_type {
+	EAD_TYPE_PING,
+	EAD_TYPE_PONG,
+
+	EAD_TYPE_SET_USERNAME,
+	EAD_TYPE_ACK_USERNAME,
+
+	EAD_TYPE_GET_PRIME,
+	EAD_TYPE_PRIME,
+
+	EAD_TYPE_SEND_A,
+	EAD_TYPE_SEND_B,
+
+	EAD_TYPE_SEND_AUTH,
+	EAD_TYPE_DONE_AUTH,
+
+	EAD_TYPE_SEND_CMD,
+	EAD_TYPE_RESULT_CMD,
+
+	EAD_TYPE_LAST
+};
+
+enum ead_auth_type {
+	EAD_AUTH_DEFAULT,
+	EAD_AUTH_MD5
+};
+
+enum ead_cmd_type {
+	EAD_CMD_NORMAL,
+	EAD_CMD_BACKGROUND,
+	EAD_CMD_LAST
+};
+
+struct ead_msg_pong {
+	uint16_t auth_type;
+	char name[];
+} __attribute__((packed));
+
+struct ead_msg_number {
+	uint8_t id;
+	unsigned char data[];
+} __attribute__((packed));
+
+struct ead_msg_salt {
+	uint8_t prime;
+	uint8_t len;
+	unsigned char salt[MAXSALTLEN];
+	unsigned char ext_salt[MAXSALTLEN];
+} __attribute__((packed));
+
+struct ead_msg_user {
+	char username[32];
+} __attribute__((packed));
+
+struct ead_msg_auth {
+	unsigned char data[20];
+} __attribute__((packed));
+
+struct ead_msg_cmd {
+	uint8_t type;
+	uint16_t timeout;
+	unsigned char data[];
+} __attribute__((packed));
+
+struct ead_msg_cmd_data {
+	uint8_t done;
+	unsigned char data[];
+} __attribute__((packed));
+
+struct ead_msg_encrypted {
+	uint32_t hash[5];
+	uint32_t iv;
+	uint8_t pad;
+	union {
+		struct ead_msg_cmd cmd;
+		struct ead_msg_cmd_data cmd_data;
+	} data[];
+} __attribute__((packed));
+
+
+#define EAD_DATA(_msg, _type) (&((_msg)->data[0]._type))
+#define EAD_ENC_DATA(_msg, _type) (&((_msg)->data[0].enc.data[0]._type))
+
+struct ead_msg {
+	uint32_t magic;
+	uint32_t len;
+	uint32_t type;
+	uint16_t nid; /* node id */
+	uint16_t tid; /* transaction id */
+	union {
+		struct ead_msg_pong pong;
+		struct ead_msg_user user;
+		struct ead_msg_number number;
+		struct ead_msg_auth auth;
+		struct ead_msg_salt salt;
+		struct ead_msg_encrypted enc;
+	} data[];
+} __attribute__((packed));
+
+
+#endif