usr/src/usr.bin/tn3270/api/api_exch.h

/*
 * This file describes the structures passed back and forth
 * between the API client and API server on a Unix-based
 * tn3270 implementation.
 */


#define EXCH_CONNECT    23      /* Connect request [client->server] */
#define EXCH_SEND_AUTH  44      /* Send auth (password) [server->client] */
        /*
         * struct storeage_desc
         * char prompt[]
         * struct storeage_desc
         * char seed[]
         */
#define EXCH_AUTH       65      /* Authorization [client->server] */
        /*
         * struct storeage_desc
         * char authenticator[]
         */
#define EXCH_CONNECTED  78      /* You are now connected [server->client] */
#define EXCH_REJECTED   93      /* Too bad [server->client] */
        /*
         * struct storeage_desc
         * char message[]
         */

#define EXCH_REQUEST    19      /* A request [client->server] */
        /* struct regs,
         * struct sregs,
         * struct storage_desc
         * char bytes[]
         */
#define EXCH_GIMME      20      /* I need client storage [server->client] */
        /*
         * struct storage_desc
         */
#define EXCH_HEREIS     49      /* Here is some storage [BOTH WAYS] */
        /*
         * struct storage_desc
         * char bytes[]
         */
#define EXCH_REPLY      87      /* End of discussion */
        /*
         * struct regs,
         * struct sregs,
         */

#define EXCH_TYPE_REGS          13
#define EXCH_TYPE_SREGS         27
#define EXCH_TYPE_STORE_DESC    33
#define EXCH_TYPE_BYTES         67

/*
 * each structure that comes over looks like:
 *
 *      char                    type of following
 *      short (2 bytes)         length of following (network byte order)
 *      following
 */

struct storage_descriptor {
    long        location;       /* In network byte order */
    short       length;         /* In network byte order */
};