PRSONA/prsona/inc/networking.hpp

#ifndef __PRSONA_NETWORKING_HPP
#define __PRSONA_NETWORKING_HPP

#include <mutex>
#include <condition_variable>

#include "CivetServer.h"

#define MG_WEBSOCKET_OPCODE_DATACOMPLETE 0xb
#define PRSONA_PORT 8080
#define USE_SSL 0

#define EXIT_URI "/exit"
#define SERVER_READY_URI "/init"
#define EPOCH_READY_URI "/ready"
#define TRIGGER_EPOCH_URI "/epoch"
#define TRIGGER_VOTE_URI "/vote"
#define TRIGGER_REP_URI "/rep?"
#define WHICH_EPOCH_URI "/which"
#define UPDATE_LOCK_URI "/lock"
#define UPDATE_UNLOCK_URI "/unlock"

#define GIVE_NEW_VOTE_URI "/ws?b"
#define PUBLIC_BGN_URI "/ws?c"
#define NUM_CLIENTS_URI "/ws?d"
#define VOTES_BY_URI "/ws?f"
#define USER_TALLY_URI "/ws?h"
#define VOTES_BY_COMMIT_URI "/ws?k"
#define USER_TALLY_COMMIT_URI "/ws?m"
#define PRIVATE_BGN_URI "/ws?p"
#define GET_FRESH_GEN_URI "/ws?q"
#define GIVE_FRESH_GEN_URI "/ws?r"
#define GET_BLIND_GEN_URI "/ws?s"
#define GIVE_BLIND_GEN_URI "/ws?t"
#define EPOCH_BUILD_UP_URI "/ws?u"
#define EPOCH_BREAK_DOWN_URI "/ws?v"
#define ACCEPT_EPOCH_UPDATES_URI "/ws?w"
#define GIVE_NEW_USER_URI "/ws?x"
#define GET_DECRYPTION_URI "/ws?y"
#define GIVE_DECRYPTION_URI "/ws?z"
#define FRESH_GEN_URI "/ws?-"
#define BLIND_GEN_URI "/ws?_"
#define REP_PROOF_URI "/ws?d"

#define TMP_FILE_SIZE 12
#define TMP_DIR "~/tmp/"
#define TMP_DIR_SIZE 6

enum RequestType {
    PRSONA_ADD_CLIENT = 'a',
    PRSONA_RECEIVE_VOTE,
    PRSONA_GET_BGN_PUBKEY,
    PRSONA_GET_NUM_CLIENTS,
    PRSONA_GET_NUM_SERVERS,
    PRSONA_GET_VOTES_BY,
    PRSONA_GET_ALL_VOTES,
    PRSONA_GET_USER_TALLY,
    PRSONA_GET_SERVER_TALLY,
    PRSONA_GET_PSEUDONYMS,
    PRSONA_GET_VOTE_ROW_COMMITMENT,
    PRSONA_GET_VOTE_MATRIX_COMMITMENT,
    PRSONA_GET_USER_TALLY_COMMITMENT,
    PRSONA_GET_SERVER_TALLY_COMMITMENT,
    PRSONA_GET_PSEUDONYMS_COMMITMENT,
    PRSONA_GET_BGN_DETAILS,
    PRSONA_ADD_CURR_SEED_TO_GENERATOR,
    PRSONA_SET_FRESH_GENERATOR,
    PRSONA_ADD_RAND_SEED_TO_GENERATOR,
    PRSONA_SET_EG_BLIND_GENERATOR,
    PRSONA_EPOCH_BUILD_UP,
    PRSONA_EPOCH_BREAK_DOWN,
    PRSONA_EPOCH_UPDATE,
    PRSONA_NEW_USER_UPDATE,
    PRSONA_GET_PARTIAL_DECRYPTION,
    PRSONA_RECEIVE_PARTIAL_DECRYPTION,
    PRSONA_GET_FRESH_GENERATOR = '-',
    PRSONA_GET_EG_BLIND_GENERATOR ='_',
    PRSONA_RECEIVE_FRESH_GENERATOR = 'a',
    PRSONA_RECEIVE_VOTE_TALLY,
    PRSONA_RECEIVE_NEW_USER_DATA,
    PRSONA_VERIFY_REPUTATION_PROOF
};

struct synchronization_tool {
    std::mutex mtx;
    std::condition_variable cv;
    size_t val, val2;
};

std::string random_string(size_t length);
void set_temp_filename(struct mg_connection *conn) const;

class RemoteControlHandler : public CivetHandler
{
    public:
        ExitHandler(struct synchronization_tool *sync)
            : sync(sync)
        { /* */ }

        ExitHandler(struct synchronization_tool *sync,
            const std::string& message)
            : sync(sync), message(message)
        { /* */ }

        bool handleGet(CivetServer *server, struct mg_connection *conn);

    private:
        const struct synchronization_tool *sync;
        const std::string message;
};

class AltRemoteControlHandler : public CivetHandler
{
    public:
        ExitHandler(size_t value, struct synchronization_tool *sync)
            : value(value), sync(sync)
        { /* */ }

        ExitHandler(size_t value,
            struct synchronization_tool *sync,
            const std::string& message)
            : value(value), sync(sync), message(message)
        { /* */ }

        bool handleGet(CivetServer *server, struct mg_connection *conn);
        std::string query() const;

    private:
        const size_t value;
        const struct synchronization_tool *sync;
        const std::string message;
        std::string query;
};

static int empty_websocket_data_handler(
    struct mg_connection *conn,
    int bits,
    char *data,
    size_t data_len,
    void *user_data)
{ return false; }

static void empty_websocket_close_handler(
    const struct mg_connection *conn,
    void *user_data)
{ /* */ }

static int synchro_websocket_data_handler(
    struct mg_connection *conn,
    int bits,
    char *data,
    size_t data_len,
    void *user_data);

static void synchro_websocket_close_handler(
    const struct mg_connection *conn,
    void *user_data);

static int file_websocket_data_handler(
    struct mg_connection *conn,
    int bits,
    char *data,
    size_t data_len,
    void *user_data);

static void file_websocket_close_handler(
    const struct mg_connection *conn,
    void *user_data);

#endif