rpcprotocol.h

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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Copyright (c) 2013-2014 The Anoncoin Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef _ANONCOINRPC_PROTOCOL_H_
#define _ANONCOINRPC_PROTOCOL_H_

#include <list>
#include <map>
#include <stdint.h>
#include <string>
#include <boost/iostreams/concepts.hpp>
#include <boost/iostreams/stream.hpp>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>

#include "json/json_spirit_reader_template.h"
#include "json/json_spirit_utils.h"
#include "json/json_spirit_writer_template.h"

// HTTP status codes
enum HTTPStatusCode
{
    HTTP_OK                    = 200,
    HTTP_BAD_REQUEST           = 400,
    HTTP_UNAUTHORIZED          = 401,
    HTTP_FORBIDDEN             = 403,
    HTTP_NOT_FOUND             = 404,
    HTTP_INTERNAL_SERVER_ERROR = 500,
};

// Anoncoin RPC error codes
enum RPCErrorCode
{
    // Standard JSON-RPC 2.0 errors
    RPC_INVALID_REQUEST  = -32600,
    RPC_METHOD_NOT_FOUND = -32601,
    RPC_INVALID_PARAMS   = -32602,
    RPC_INTERNAL_ERROR   = -32603,
    RPC_PARSE_ERROR      = -32700,

    // General application defined errors
    RPC_MISC_ERROR                  = -1,  // std::exception thrown in command handling
    RPC_FORBIDDEN_BY_SAFE_MODE      = -2,  // Server is in safe mode, and command is not allowed in safe mode
    RPC_TYPE_ERROR                  = -3,  // Unexpected type was passed as parameter
    RPC_INVALID_ADDRESS_OR_KEY      = -5,  // Invalid address or key
    RPC_OUT_OF_MEMORY               = -7,  // Ran out of memory during operation
    RPC_INVALID_PARAMETER           = -8,  // Invalid, missing or duplicate parameter
    RPC_DATABASE_ERROR              = -20, // Database error
    RPC_DESERIALIZATION_ERROR       = -22, // Error parsing or validating structure in raw format
    RPC_TRANSACTION_ERROR           = -25, // General error during transaction submission
    RPC_TRANSACTION_REJECTED        = -26, // Transaction was rejected by network rules
    RPC_TRANSACTION_ALREADY_IN_CHAIN= -27, // Transaction already in chain

    // P2P client errors
    RPC_CLIENT_NOT_CONNECTED        = -9,  // Anoncoin is not connected
    RPC_CLIENT_IN_INITIAL_DOWNLOAD  = -10, // Still downloading initial blocks
    RPC_CLIENT_NODE_ALREADY_ADDED   = -23, // Node is already added
    RPC_CLIENT_NODE_NOT_ADDED       = -24, // Node has not been added before

    // Wallet errors
    RPC_WALLET_ERROR                = -4,  // Unspecified problem with wallet (key not found etc.)
    RPC_WALLET_INSUFFICIENT_FUNDS   = -6,  // Not enough funds in wallet or account
    RPC_WALLET_INVALID_ACCOUNT_NAME = -11, // Invalid account name
    RPC_WALLET_KEYPOOL_RAN_OUT      = -12, // Keypool ran out, call keypoolrefill first
    RPC_WALLET_UNLOCK_NEEDED        = -13, // Enter the wallet passphrase with walletpassphrase first
    RPC_WALLET_PASSPHRASE_INCORRECT = -14, // The wallet passphrase entered was incorrect
    RPC_WALLET_WRONG_ENC_STATE      = -15, // Command given in wrong wallet encryption state (encrypting an encrypted wallet etc.)
    RPC_WALLET_ENCRYPTION_FAILED    = -16, // Failed to encrypt the wallet
    RPC_WALLET_ALREADY_UNLOCKED     = -17, // Wallet is already unlocked
};

//
// IOStream device that speaks SSL but can also speak non-SSL
//
template <typename Protocol>
class SSLIOStreamDevice : public boost::iostreams::device<boost::iostreams::bidirectional> {
public:
    SSLIOStreamDevice(boost::asio::ssl::stream<typename Protocol::socket> &streamIn, bool fUseSSLIn) : stream(streamIn)
    {
        fUseSSL = fUseSSLIn;
        fNeedHandshake = fUseSSLIn;
    }

    void handshake(boost::asio::ssl::stream_base::handshake_type role)
    {
        if (!fNeedHandshake) return;
        fNeedHandshake = false;
        stream.handshake(role);
    }
    std::streamsize read(char* s, std::streamsize n)
    {
        handshake(boost::asio::ssl::stream_base::server); // HTTPS servers read first
        if (fUseSSL) return stream.read_some(boost::asio::buffer(s, n));
        return stream.next_layer().read_some(boost::asio::buffer(s, n));
    }
    std::streamsize write(const char* s, std::streamsize n)
    {
        handshake(boost::asio::ssl::stream_base::client); // HTTPS clients write first
        if (fUseSSL) return boost::asio::write(stream, boost::asio::buffer(s, n));
        return boost::asio::write(stream.next_layer(), boost::asio::buffer(s, n));
    }
    bool connect(const std::string& server, const std::string& port)
    {
        boost::asio::ip::tcp::resolver resolver(stream.get_io_service());
        boost::asio::ip::tcp::resolver::query query(server.c_str(), port.c_str());
        boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
        boost::asio::ip::tcp::resolver::iterator end;
        boost::system::error_code error = boost::asio::error::host_not_found;
        while (error && endpoint_iterator != end)
        {
            stream.lowest_layer().close();
            stream.lowest_layer().connect(*endpoint_iterator++, error);
        }
        if (error)
            return false;
        return true;
    }

private:
    bool fNeedHandshake;
    bool fUseSSL;
    boost::asio::ssl::stream<typename Protocol::socket>& stream;
};

std::string HTTPPost(const std::string& strMsg, const std::map<std::string,std::string>& mapRequestHeaders);
std::string HTTPReply(int nStatus, const std::string& strMsg, bool keepalive);
bool ReadHTTPRequestLine(std::basic_istream<char>& stream, int &proto,
                         std::string& http_method, std::string& http_uri);
int ReadHTTPStatus(std::basic_istream<char>& stream, int &proto);
int ReadHTTPHeaders(std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet);
int ReadHTTPMessage(std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet,
                    std::string& strMessageRet, int nProto);
std::string JSONRPCRequest(const std::string& strMethod, const json_spirit::Array& params, const json_spirit::Value& id);
json_spirit::Object JSONRPCReplyObj(const json_spirit::Value& result, const json_spirit::Value& error, const json_spirit::Value& id);
std::string JSONRPCReply(const json_spirit::Value& result, const json_spirit::Value& error, const json_spirit::Value& id);
json_spirit::Object JSONRPCError(int code, const std::string& message);

#endif