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140 lines
2.7 KiB
C
140 lines
2.7 KiB
C
/*
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* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __EAD_H
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#define __EAD_H
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#define EAD_DEBUGLEVEL 1
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#include <stdint.h>
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#include <stddef.h>
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#ifndef MAXSALTLEN
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#define MAXSALTLEN 32
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#endif
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#define EAD_PORT 56026UL
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#define EAD_MAGIC 3671771902UL
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#define EAD_CMD_TIMEOUT 10
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#define EAD_MAX_IV_INCR 128
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/* request/response types */
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/* response id == request id + 1 */
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enum ead_type {
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EAD_TYPE_PING,
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EAD_TYPE_PONG,
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EAD_TYPE_SET_USERNAME,
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EAD_TYPE_ACK_USERNAME,
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EAD_TYPE_GET_PRIME,
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EAD_TYPE_PRIME,
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EAD_TYPE_SEND_A,
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EAD_TYPE_SEND_B,
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EAD_TYPE_SEND_AUTH,
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EAD_TYPE_DONE_AUTH,
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EAD_TYPE_SEND_CMD,
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EAD_TYPE_RESULT_CMD,
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EAD_TYPE_LAST
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};
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enum ead_auth_type {
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EAD_AUTH_DEFAULT,
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EAD_AUTH_MD5
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};
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enum ead_cmd_type {
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EAD_CMD_NORMAL,
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EAD_CMD_BACKGROUND,
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EAD_CMD_LAST
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};
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struct ead_msg_pong {
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uint16_t auth_type;
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char name[];
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} __attribute__((packed));
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struct ead_msg_number {
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uint8_t id;
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unsigned char data[];
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} __attribute__((packed));
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struct ead_msg_salt {
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uint8_t prime;
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uint8_t len;
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unsigned char salt[MAXSALTLEN];
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unsigned char ext_salt[MAXSALTLEN];
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} __attribute__((packed));
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struct ead_msg_user {
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char username[32];
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} __attribute__((packed));
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struct ead_msg_auth {
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unsigned char data[20];
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} __attribute__((packed));
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struct ead_msg_cmd {
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uint8_t type;
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uint16_t timeout;
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unsigned char data[];
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} __attribute__((packed));
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struct ead_msg_cmd_data {
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uint8_t done;
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unsigned char data[];
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} __attribute__((packed));
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struct ead_msg_encrypted {
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uint32_t hash[5];
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uint32_t iv;
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uint8_t pad;
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union {
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struct ead_msg_cmd cmd;
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struct ead_msg_cmd_data cmd_data;
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} data[];
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} __attribute__((packed));
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#define EAD_DATA(_msg, _type) (&((_msg)->data[0]._type))
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#define EAD_ENC_DATA(_msg, _type) (&((_msg)->data[0].enc.data[0]._type))
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/* for ead_msg::sid */
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#define EAD_INSTANCE_MASK 0xf000
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#define EAD_INSTANCE_SHIFT 12
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struct ead_msg {
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uint32_t magic;
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uint32_t len;
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uint32_t type;
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uint16_t nid; /* node id */
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uint16_t sid; /* session id */
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uint32_t ip; /* source ip for responses from the server */
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union {
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struct ead_msg_pong pong;
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struct ead_msg_user user;
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struct ead_msg_number number;
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struct ead_msg_auth auth;
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struct ead_msg_salt salt;
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struct ead_msg_encrypted enc;
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} data[];
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} __attribute__((packed));
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#endif
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