plugin.h

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#ifndef __DNSCRYPT_PLUGIN_H__
#define __DNSCRYPT_PLUGIN_H__ 1

#include <assert.h>
#include <string.h>

#include <dnscrypt/private.h>
#include <dnscrypt/version.h>

#ifdef __cplusplus
extern "C" {
#endif

#define DCPLUGIN_MAIN(ID) DCPLUGIN_MAIN_PRIVATE(ID)

typedef struct DCPlugin_ DCPlugin;

typedef struct DCPluginDNSPacket_ DCPluginDNSPacket;

typedef enum DCPluginSyncFilterResult_ {
    DCP_SYNC_FILTER_RESULT_OK,
    DCP_SYNC_FILTER_RESULT_DIRECT,
    DCP_SYNC_FILTER_RESULT_KILL,
    DCP_SYNC_FILTER_RESULT_ERROR,
    DCP_SYNC_FILTER_RESULT_FATAL
} DCPluginSyncFilterResult;

int dcplugin_init(DCPlugin *dcplugin, int argc, char *argv[]);

int dcplugin_destroy(DCPlugin *dcplugin);

const char *dcplugin_description(DCPlugin *dcplugin);

const char *dcplugin_long_description(DCPlugin *dcplugin);

DCPluginSyncFilterResult
dcplugin_sync_pre_filter(DCPlugin *dcplugin, DCPluginDNSPacket *dcp_packet);

DCPluginSyncFilterResult
dcplugin_sync_post_filter(DCPlugin *dcplugin, DCPluginDNSPacket *dcp_packet);

#define dcplugin_get_user_data(P) ((P)->user_data)

#define dcplugin_set_user_data(P, V) ((P)->user_data = (V))

#define dcplugin_get_client_address(D) ((D)->client_sockaddr)

#define dcplugin_get_client_address_len(D) ((D)->client_sockaddr_len)

#define dcplugin_get_wire_data(D) ((D)->dns_packet)

#define dcplugin_set_wire_data(D, V, L) do { \
      dcplugin_set_wire_data_len((D), (L)); \
      memcpy(dcplugin_get_wire_data(D), (V), (L)); \
    } while(0)

#define dcplugin_get_wire_data_len(D) (*((D)->dns_packet_len_p))

#define dcplugin_set_wire_data_len(D, L) do { \
      assert(dcplugin_get_wire_data_max_len(D) >= (L)); \
      (*((D)->dns_packet_len_p)) = (L); \
    } while(0)

#define dcplugin_get_wire_data_max_len(D) ((D)->dns_packet_max_len)

#ifdef __cplusplus
}
#endif

#endif