request.h

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#ifndef SPRKL_REQUEST_H
#define SPRKL_REQUEST_H
 
#include "common.h"
#include "service.h"
 
#include <stdint.h>
#include <stdio.h>

#define SPRKL_REQUEST_MAGIC "PawRqust"
#define SPRKL_REQUEST_MAGIC_SZ ((sizeof SPRKL_REQUEST_MAGIC) - 1)
#define SPRKL_RESPONSE_MAGIC "PawRspns"
#define SPRKL_RESPONSE_MAGIC_SZ ((sizeof SPRKL_RESPONSE_MAGIC) - 1)
#define SPRKL_PROTO_VERSION 1

enum sprkl_request_verb {
        SPRKL_VERB_ECHO = 0, 
        SPRKL_VERB_FETCHSERVICE = 1, 
        //SPRKL_VERB_QUERYSERVICES = 2
};

enum sprkl_response_status {
        SPRKL_STATUS_OK = 0x0200,
        SPRKL_STATUS_REQ_ERR = 0x0400,
        SPRKL_STATUS_NOT_FOUND = 0x0404,
        SPRKL_STATUS_RESP_ERR = 0x0500,
        SPRKL_STATUS_NOT_IMPL = 0x0501,
        SPRKL_STATUS_UNAVAIL = 0x0503,
        SPRKL_STATUS_VERB_UNK = 0x0505,
};

struct sprkl_request_echo {
        uint8_t data[16]; 
};

struct sprkl_response_echo {
        uint8_t data[16]; 
};

struct sprkl_request_fetchservice {
        enum sprkl_sigalgo keyalgo; 
        uint16_t keysz; 
        uint8_t* key; 
        uint16_t index; 
};

struct sprkl_response_fetchservice {
        struct sprkl_service* svc;
};

struct sprkl_request {
        enum sprkl_request_verb verb; 
        union {
                struct sprkl_request_echo echo;
                struct sprkl_request_fetchservice fetchsvc;
                //struct sprkl_request_queryservices querysvcs;
        };
};

struct sprkl_response {
        enum sprkl_request_verb verb; 
        enum sprkl_response_status status; 
        uint16_t errmsgsz; 
        uint8_t* errmsg; 
        union {
                struct sprkl_response_echo echo;
                struct sprkl_response_fetchservice fetchsvc;
        };
};

int sprkl_request_write(struct sprkl_request* request, FILE* stream);

int sprkl_request_read(struct sprkl_request* request, FILE* stream);

void sprkl_request_freeparts(struct sprkl_request* request);

void sprkl_request_freeall(struct sprkl_request* request);

struct sprkl_request* sprkl_request_make_fetchservice(
        enum sprkl_sigalgo keyalgo,
        uint8_t* key,
        uint16_t serviceidx
        );
 

char* sprkl_response_statusmsg(enum sprkl_response_status status);

int sprkl_response_write(struct sprkl_response* response, FILE* stream);

int sprkl_response_read(struct sprkl_response* response, FILE* stream);

void sprkl_response_freeparts(struct sprkl_response* response, bool errmsg);

void sprkl_response_freeall(struct sprkl_response* response);
 
#endif