Annotation of libaitrpc/inc/aitrpc.h, revision 1.2.4.3

1.1       misho       1: /*************************************************************************
                      2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
                      3: *  by Michael Pounov <misho@openbsd-bg.org>
                      4: *
                      5: * $Author: misho $
1.2.4.3 ! misho       6: * $Id: aitrpc.h,v 1.2.4.2 2011/08/18 19:04:10 misho Exp $
1.1       misho       7: *
1.2       misho       8: **************************************************************************
                      9: The ELWIX and AITNET software is distributed under the following
                     10: terms:
                     11: 
                     12: All of the documentation and software included in the ELWIX and AITNET
                     13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
                     14: 
                     15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
                     16:        by Michael Pounov <misho@elwix.org>.  All rights reserved.
                     17: 
                     18: Redistribution and use in source and binary forms, with or without
                     19: modification, are permitted provided that the following conditions
                     20: are met:
                     21: 1. Redistributions of source code must retain the above copyright
                     22:    notice, this list of conditions and the following disclaimer.
                     23: 2. Redistributions in binary form must reproduce the above copyright
                     24:    notice, this list of conditions and the following disclaimer in the
                     25:    documentation and/or other materials provided with the distribution.
                     26: 3. All advertising materials mentioning features or use of this software
                     27:    must display the following acknowledgement:
                     28: This product includes software developed by Michael Pounov <misho@elwix.org>
                     29: ELWIX - Embedded LightWeight unIX and its contributors.
                     30: 4. Neither the name of AITNET nor the names of its contributors
                     31:    may be used to endorse or promote products derived from this software
                     32:    without specific prior written permission.
                     33: 
                     34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
                     35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     37: ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     44: SUCH DAMAGE.
                     45: */
1.1       misho      46: #ifndef __AITRPC_H
                     47: #define __AITRPC_H
                     48: 
                     49: 
                     50: #include <assert.h>
                     51: #include <stdlib.h>
                     52: #include <string.h>
                     53: #include <sys/types.h>
                     54: #include <sys/param.h>
1.2       misho      55: #if !defined(__NetBSD__)
1.1       misho      56: #include <sys/limits.h>
1.2       misho      57: #endif
1.1       misho      58: #include <sys/socket.h>
                     59: 
                     60: 
                     61: #define RPC_VERSION            1
                     62: #define RPC_DEFPORT            2611
                     63: 
                     64: 
                     65: /* RPC builtin registed calls */
                     66: 
1.2       misho      67: #define CALL_BLOBSHUTDOWN      "rpcBLOBServerShutdown"
                     68: #define CALL_BLOBCLIENTS       "rpcBLOBServerClients"
                     69: #define CALL_BLOBVARS          "rpcBLOBServerVars"
                     70: #define CALL_BLOBSTATE         "rpcBLOBServerState"
                     71: 
                     72: #define CALL_SRVSHUTDOWN       "rpcServerShutdown"
1.1       misho      73: #define CALL_SRVCLIENTS                "rpcServerClients"
                     74: #define CALL_SRVCALLS          "rpcServerCalls"
                     75: #define CALL_SRVSESSIONS       "rpcServerSessions"
                     76: 
                     77: 
                     78: /* RPC types */
                     79: 
                     80: typedef enum {
                     81:        empty,                          // empty -> variable is not set
1.2       misho      82:        buffer, string, blob,           // buffer -> uint8_t*; string -> int8_t*; blob -> void*(+socket);
1.1       misho      83:        size, offset, datetime,         // size -> size_t; offset -> off_t; datetime -> time_t;
                     84:        real, bigreal,                  // real -> float; bigreal -> double;
                     85:        u8, u16, u32, u64,              // unsigned integers ...
                     86:        i8, i16, i32, i64               // integers ...
                     87: } rpc_type_t;
                     88: 
1.2       misho      89: typedef enum {
                     90:        disable, enable,                // for blob.state
                     91:        ok, error,                      // for blob reply
                     92:        get, set, unset                 // for blob request
                     93: } cmd_type_t;
                     94: 
1.1       misho      95: /* RPC value */
                     96: 
                     97: typedef struct {
                     98:        rpc_type_t      val_type;
                     99:        size_t          val_len;
                    100:        union {
                    101:                uint8_t         *buffer;
                    102:                int8_t          *string;
1.2       misho     103:                uint32_t        blob;
1.1       misho     104:                size_t          size;
                    105:                off_t           offset;
                    106:                time_t          datetime;
                    107:                float           real;
                    108:                double          bigreal;
                    109:                uint8_t         u8;
                    110:                uint16_t        u16;
                    111:                uint32_t        u32;
                    112:                uint64_t        u64;
                    113:                int8_t          i8;
                    114:                int16_t         i16;
                    115:                int32_t         i32;
                    116:                int64_t         i64;
                    117:        } val;
                    118: } __packed rpc_val_t;
                    119: 
                    120: #define RPC_TYPE_VAL(vl)               ((vl)->val_type)
                    121: #define RPC_LEN_VAL(vl)                        ((vl)->val_len)
1.2       misho     122: #define RPC_BLOB_CHUNKS(vl, n)         ((vl)->val_len / (n) + ((vl)->val_len % (n)) ? 1 : 0)
1.1       misho     123: #define RPC_EMPTY_VAL(vl)              ((vl)->val_type == empty)
                    124: 
                    125: #define RPC_GET_BUF(vl)                        (assert((vl)->val_type == buffer), (vl)->val.buffer)
                    126: #define RPC_GET_STR(vl)                        (assert((vl)->val_type == string), (vl)->val.string)
1.2       misho     127: #define RPC_GET_BLOB(vl)               (assert((vl)->val_type == blob), (vl)->val.blob)
1.1       misho     128: #define RPC_GET_SIZE(vl)               (assert((vl)->val_type == size), (vl)->val.size)
                    129: #define RPC_GET_OFF(vl)                        (assert((vl)->val_type == offset), (vl)->val.offset)
                    130: #define RPC_GET_TIME(vl)               (assert((vl)->val_type == datetime), (vl)->val.datetime)
                    131: #define RPC_GET_REAL(vl)               (assert((vl)->val_type == real), (vl)->val.real)
                    132: #define RPC_GET_BREAL(vl)              (assert((vl)->val_type == bigreal), (vl)->val.bigreal)
                    133: #define RPC_GET_U8(vl)                 (assert((vl)->val_type == u8), (vl)->val.u8)
                    134: #define RPC_GET_U16(vl)                        (assert((vl)->val_type == u16), (vl)->val.u16)
                    135: #define RPC_GET_U32(vl)                        (assert((vl)->val_type == u32), (vl)->val.u32)
                    136: #define RPC_GET_U64(vl)                        (assert((vl)->val_type == u64), (vl)->val.u64)
                    137: #define RPC_GET_I8(vl)                 (assert((vl)->val_type == i8), (vl)->val.i8)
                    138: #define RPC_GET_I16(vl)                        (assert((vl)->val_type == i16), (vl)->val.i16)
                    139: #define RPC_GET_I32(vl)                        (assert((vl)->val_type == i32), (vl)->val.i32)
                    140: #define RPC_GET_I64(vl)                        (assert((vl)->val_type == i64), (vl)->val.i64)
                    141: 
                    142: #define RPC_SET_BUF(vl, v, l)          do { rpc_val_t *val = (vl); assert(val); val->val.buffer = malloc(l); \
                    143:                                                if (val->val.buffer) { \
                    144:                                                        val->val_type = buffer; val->val_len = l; \
                    145:                                                        memcpy(val->val.buffer, v, l); \
                    146:                                                } } while (0)
                    147: #define RPC_SET_STR(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val.string = (int8_t*) strdup(v); \
                    148:                                                if (val->val.string) { \
                    149:                                                        val->val_type = string; val->val_len = strlen(v) + 1; \
                    150:                                                } } while (0)
1.2       misho     151: #define RPC_SET_BLOB(vl, v, l)         do { rpc_val_t *val = (vl); assert(val); val->val_type = blob; \
                    152:                                                val->val.blob = v; val->val_len = l; } while (0)
                    153: #define RPC_SET_BLOB2(vl, b)           do { rpc_val_t *val = (vl); assert(val); assert(b); val->val_type = blob; \
                    154:                                                val->val.blob = b->blob_var; val->val_len = b->blob_len; } while (0)
1.1       misho     155: #define RPC_SET_SIZE(vl, v)            do { rpc_val_t *val = (vl); assert(val); val->val_type = size; val->val.size = v; \
                    156:                                                val->val_len = sizeof(size_t); } while (0)
                    157: #define RPC_SET_OFF(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = offset; val->val.offset = v; \
                    158:                                                val->val_len = sizeof(off_t); } while (0)
                    159: #define RPC_SET_TIME(vl, v)            do { rpc_val_t *val = (vl); assert(val); val->val_type = datetime; val->val.datetime = v; \
                    160:                                                val->val_len = sizeof(time_t); } while (0)
                    161: #define RPC_SET_REAL(vl, v)            do { rpc_val_t *val = (vl); assert(val); val->val_type = real; val->val.real = v; \
                    162:                                                val->val_len = sizeof(float); } while (0)
                    163: #define RPC_SET_BREAL(vl, v)           do { rpc_val_t *val = (vl); assert(val); val->val_type = bigreal; val->val.bigreal = v; \
                    164:                                                val->val_len = sizeof(double); } while (0)
                    165: #define RPC_SET_U8(vl, v)              do { rpc_val_t *val = (vl); assert(val); val->val_type = u8; val->val.u8 = v; \
                    166:                                                val->val_len = sizeof(uint8_t); } while (0)
                    167: #define RPC_SET_U16(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = u16; val->val.u16 = v; \
                    168:                                                val->val_len = sizeof(uint16_t); } while (0)
                    169: #define RPC_SET_U32(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = u32; val->val.u32 = v; \
                    170:                                                val->val_len = sizeof(uint32_t); } while (0)
                    171: #define RPC_SET_U64(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = u64; val->val.u64 = v; \
                    172:                                                val->val_len = sizeof(uint64_t); } while (0)
                    173: #define RPC_SET_I8(vl, v)              do { rpc_val_t *val = (vl); assert(val); val->val_type = i8; val->val.i8 = v; \
                    174:                                                val->val_len = sizeof(int8_t); } while (0)
                    175: #define RPC_SET_I16(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = i16; val->val.i16 = v; \
                    176:                                                val->val_len = sizeof(int16_t); } while (0)
                    177: #define RPC_SET_I32(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = i32; val->val.i32 = v; \
                    178:                                                val->val_len = sizeof(int32_t); } while (0)
                    179: #define RPC_SET_I64(vl, v)             do { rpc_val_t *val = (vl); assert(val); val->val_type = i64; val->val.i64 = v; \
                    180:                                                val->val_len = sizeof(int64_t); } while (0)
                    181: 
                    182: #define RPC_FREE_VAL(vl)               do { rpc_val_t *val = (vl); assert(val); \
                    183:                                                if (val->val_type == buffer && val->val.buffer) { \
                    184:                                                        free(val->val.buffer); \
                    185:                                                        val->val.buffer = NULL; \
                    186:                                                } \
                    187:                                                if (val->val_type == string && val->val.string) { \
                    188:                                                        free(val->val.string); \
                    189:                                                        val->val.string = NULL; \
                    190:                                                } \
                    191:                                                val->val_type = val->val_len = 0; \
                    192:                                        } while (0)
                    193: 
                    194: 
1.2       misho     195: #define RPC_CALLBACK_CHECK_INPUT(x)    do { \
                    196:                                                if (!x) { \
                    197:                                                        rpc_SetErr(22, "Error:: invalid callback parameters ...\n"); \
                    198:                                                        return -1; \
                    199:                                                } \
                    200:                                        } while (0)
                    201: #define RPC_CALLBACK_CHK_ARGS(f, n)    do { \
                    202:                                                RPC_CALLBACK_CHECK_INPUT(f); \
                    203:                                                if (f && f->func_args != n) { \
1.1       misho     204:                                                        rpc_SetErr(22, "Error:: different number of arguments!\n"); \
                    205:                                                        return -1; \
                    206:                                                } \
1.2       misho     207:                                        } while (0)
1.1       misho     208: 
                    209: 
                    210: /* RPC session identification */
                    211: 
                    212: typedef struct {
                    213:        uint8_t         sess_version;
                    214:        uint32_t        sess_program;
                    215:        uint32_t        sess_process;
                    216: } __packed rpc_sess_t;
                    217: 
                    218: 
                    219: /* Server managment RPC functions ... */
                    220: 
                    221: // RPC function registration element!
                    222: typedef struct tagRPCFunc {
                    223:        uint16_t                func_tag;
                    224:        uint32_t                func_hash;
                    225:        int8_t                  func_file[MAXPATHLEN];
                    226:        int8_t                  func_name[UCHAR_MAX + 1];
                    227: 
                    228:        int8_t                  func_args;
                    229:        rpc_val_t               *func_vals;
                    230: 
1.2       misho     231:        void                    *func_parent;
1.1       misho     232:        struct tagRPCFunc       *func_next;
                    233: } rpc_func_t;
                    234: 
                    235: 
                    236: /* Network RPC packet - Client request */
                    237: 
                    238: struct tagRPCCall {
                    239:        rpc_sess_t      call_session;
                    240:        uint16_t        call_tag;
                    241:        uint32_t        call_hash;
                    242:        uint8_t         call_argc;
                    243: } __packed;
                    244: 
                    245: /* Network RPC packet - Server response */
                    246: 
                    247: struct tagRPCRet {
                    248:        rpc_sess_t      ret_session;
                    249:        uint16_t        ret_tag;
                    250:        uint32_t        ret_hash;
                    251:        int32_t         ret_retcode;
                    252:        int32_t         ret_errno;
                    253:        uint8_t         ret_argc;
                    254: } __packed;
                    255: 
1.2       misho     256: /* Network BLOB packet - Header */
                    257: 
                    258: struct tagBLOBHdr {
                    259:        rpc_sess_t      hdr_session;
                    260:        uint8_t         hdr_cmd;
                    261:        uint32_t        hdr_var;
                    262:        uint32_t        hdr_len;
                    263:        uint32_t        hdr_ret;
                    264: } __packed;
                    265: 
1.1       misho     266: /* Network RPC client & server elements */
                    267: 
                    268: typedef struct {
                    269:        struct sockaddr cli_sa;         // host info
1.2.4.2   misho     270:        int             cli_sock;       // socket fd
                    271:        int             cli_type;       // socket type
1.1       misho     272:        pthread_t       cli_tid;        // TID of thread
                    273: 
                    274:        void            *cli_parent;    // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
                    275: } rpc_cli_t;
                    276: 
1.2       misho     277: 
                    278: // BLOB registration element!
                    279: typedef struct tagBLOB {
                    280:        uint32_t        blob_var;
                    281: 
                    282:        size_t          blob_len;       // size of allocated BLOB data
                    283:        void            *blob_data;     // BLOB data
                    284: 
                    285:        struct tagBLOB  *blob_next;
                    286: } rpc_blob_t;
                    287: 
1.1       misho     288: typedef struct {
1.2       misho     289:        rpc_sess_t      srv_session;    // RPC session registration info
1.1       misho     290:        int             srv_numcli;     // maximum concurent client connections
                    291: 
1.2       misho     292:        rpc_cli_t       srv_server;     // RPC server socket
                    293:        rpc_cli_t       *srv_clients;   // connected rpc client sockets
                    294: 
                    295:        rpc_func_t      *srv_funcs;     // registered functions list
                    296: 
                    297:        pthread_mutex_t srv_mtx;
                    298: 
                    299:        struct {
                    300:                int             state;          // BLOB server state: ==0 disable | !=0 enable
                    301:                char            dir[UCHAR_MAX + 1];
                    302: 
                    303:                rpc_cli_t       server;         // BLOB server socket
                    304:                rpc_cli_t       *clients;       // connected blob client sockets
1.1       misho     305: 
1.2       misho     306:                rpc_blob_t      *blobs;         // registered blob variables list
1.1       misho     307: 
1.2       misho     308:                pthread_mutex_t mtx;
                    309:        }               srv_blob;
1.1       misho     310: } rpc_srv_t;
                    311: 
                    312: 
1.2       misho     313: /* 
                    314:  * (*rpc_callback_t)() Callback type definition for RPC call in server process
                    315:  * @arg1 = current execution RPC call function
                    316:  * @arg2 = number of items in input array from call request
                    317:  * @arg3 = input array with values from RPC call execution request
                    318:  * return: -1 error or >-1 success execution
                    319:  */
                    320: typedef int (*rpc_callback_t)(rpc_func_t *, int, rpc_val_t *);
1.1       misho     321: 
                    322: 
                    323: // -----------------------------------------------------------------------
                    324: 
                    325: /* Error support functions */
                    326: 
                    327: // cli_GetErrno() Get error code of last operation
                    328: inline int cli_GetErrno();
                    329: // cli_GetError() Get error text of last operation
                    330: inline const char *cli_GetError();
                    331: 
                    332: 
                    333: /* RPC Server side functions */
                    334: 
                    335: /*
                    336:  * rpc_srv_initServer() Init & create RPC Server
                    337:  * @regProgID = ProgramID for authentication & recognition
                    338:  * @regProcID = ProcessID for authentication & recognition
                    339:  * @concurentClients = Concurent clients at same time to this server
1.2.4.1   misho     340:  * @sockType = Socket type, like SOCK_STREAM, SOCK_DGRAM or SOCK_RAW
                    341:  * @family = Family type, AF_INET, AF_INET6 or AF_LOCAL
                    342:  * @csHost = Host name or address for bind server, if NULL any address
1.1       misho     343:  * @Port = Port for bind server, if Port == 0 default port is selected
                    344:  * return: NULL == error or !=NULL bind and created RPC server instance
                    345:  */
                    346: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients, 
1.2.4.1   misho     347:                int sockType, u_short family, const char *csHost, u_short Port);
1.1       misho     348: /*
                    349:  * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
                    350:  * @srv = RPC Server instance
                    351:  * return: none
                    352:  */
                    353: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
                    354: /*
                    355:  * rpc_srv_execServer() Execute Main server loop and wait for clients requests
                    356:  * @srv = RPC Server instance
                    357:  * return: -1 error or 0 ok, infinite loop ...
                    358:  */
                    359: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
                    360: 
                    361: /*
1.2       misho     362:  * rpc_srv_initBLOBServer() Init & create BLOB Server
1.2.4.3 ! misho     363:  * @srv = RPC server instance
        !           364:  * @sockType = Socket type, like SOCK_STREAM, SOCK_DGRAM or SOCK_RAW
1.2       misho     365:  * @Port = Port for bind server, if Port == 0 default port is selected
                    366:  * @diskDir = Disk place for BLOB file objects
                    367:  * return: -1 == error or 0 bind and created BLOB server instance
                    368:  */
1.2.4.3 ! misho     369: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, int sockType, u_short Port, const char *diskDir);
1.2       misho     370: /*
                    371:  * rpc_srv_endBLOBServer() Destroy BLOB server, close all opened sockets and free resources
                    372:  * @srv = RPC Server instance
                    373:  * return: none
                    374:  */
                    375: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
                    376: /*
                    377:  * rpc_srv_execBLOBServer() Execute Main BLOB server loop and wait for clients requests
                    378:  * @srv = RPC Server instance
                    379:  * return: -1 error or 0 ok, infinite loop ...
                    380:  */
                    381: int rpc_srv_execBLOBServer(rpc_srv_t * __restrict srv);
                    382: 
                    383: /*
1.1       misho     384:  * rpc_srv_registerCall() Register call to RPC server
                    385:  * @srv = RPC Server instance
                    386:  * @csModule = Module name, if NULL self binary
                    387:  * @csFunc = Function name
1.2       misho     388:  * @args = Number of return function arguments, use for restriction case!
1.1       misho     389:  * return: -1 error or 0 register ok
                    390:  */
                    391: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc, 
                    392:                unsigned char args);
                    393: /*
                    394:  * rpc_srv_unregisterCall() Unregister call from RPC server
                    395:  * @srv = RPC Server instance
                    396:  * @csModule = Module name, if NULL self binary
                    397:  * @csFunc = Function name
                    398:  * return: -1 error, 0 not found call, 1 unregister ok
                    399:  */
                    400: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
                    401: /*
                    402:  * rpc_srv_getFunc() Get registered call from RPC server by Name
                    403:  * @srv = RPC Server instance
                    404:  * @csModule = Module name, if NULL self binary
                    405:  * @csFunc = Function name
                    406:  * return: NULL not found call, !=NULL return call
                    407:  */
                    408: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
                    409: /*
                    410:  * rpc_srv_getCall() Get registered call from RPC server
                    411:  * @srv = RPC Server instance
                    412:  * @tag = tag for function
                    413:  * @hash = hash for function
                    414:  * return: NULL not found call, !=NULL return call
                    415:  */
                    416: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
                    417: /*
                    418:  * rpc_srv_execCall() Execute registered call from RPC server
                    419:  * @call = Register RPC call
                    420:  * @rpc = IN RPC call structure
                    421:  * @args = IN RPC call array of rpc values
                    422:  * return: -1 error, !=-1 ok
                    423:  */
1.2       misho     424: int rpc_srv_execCall(rpc_func_t * __restrict call, struct tagRPCCall * __restrict rpc, 
                    425:                rpc_val_t * __restrict args);
1.1       misho     426: 
                    427: 
                    428: /*
1.2       misho     429:  * rpc_srv_retValsCall() Declare return variables for RPC call and zeroed values
                    430:                                        (for safe handling return values, use this!)
                    431:  * @call = RPC function call
                    432:  * @return_vals = Number of return variables
                    433:  * return: NULL error, !=NULL array with return values for RPC call with return_vals items
                    434:  */
                    435: inline rpc_val_t *rpc_srv_retValsCall(rpc_func_t * __restrict call, int return_vals);
                    436: /*
                    437:  * rpc_srv_declValsCall() Declare return variables for RPC call, 
                    438:                                if already allocated memory for RPC call return values 
                    439:                                function reallocate used space with return_vals count elements
1.1       misho     440:  * @call = RPC function call
                    441:  * @return_vals = Number of return variables
                    442:  * return: -1 error, !=-1 ok
                    443:  */
                    444: inline int rpc_srv_declValsCall(rpc_func_t * __restrict call, int return_vals);
                    445: /*
                    446:  * rpc_srv_freeValsCall() Free return variables for RPC call
                    447:  * @call = RPC function call
                    448:  * return: none
                    449:  */
                    450: inline void rpc_srv_freeValsCall(rpc_func_t * __restrict call);
                    451: /*
                    452:  * rpc_srv_copyValsCall() Copy return variables for RPC call to new variable
                    453:  * @call = RPC function call
                    454:  * @newvals = New allocated variables array, must be free after use
                    455:  * return: -1 error, !=-1 Returned number of copied RPC variables
                    456:  */
                    457: inline int rpc_srv_copyValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict newvals);
                    458: /*
1.2       misho     459:  * rpc_srv_zeroValsCall() Clean values from return variables of RPC call
1.1       misho     460:  * @call = RPC function call
                    461:  * return: -1 error, !=-1 Returned number of cleaned RPC variables
                    462:  */
1.2       misho     463: inline int rpc_srv_zeroValsCall(rpc_func_t * __restrict call);
1.1       misho     464: /*
                    465:  * rpc_srv_getValsCall() Get return variables for RPC call
                    466:  * @call = RPC function call
                    467:  * @vals = Returned variables, may be NULL
                    468:  * return: -1 error, !=-1 Number of returned variables
                    469:  */
                    470: inline int rpc_srv_getValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict vals);
                    471: 
                    472: 
1.2       misho     473: /*
                    474:  * rpc_srv_blobCreate() Create map blob to memory region and return object
                    475:  * @srv = RPC Server instance
                    476:  * @len = BLOB length object
                    477:  * return: NULL error or !=NULL allocated BLOB object
                    478:  */
                    479: inline rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len);
                    480: /*
                    481:  * rpc_srv_blobMap() Map blob to memory region 
                    482:  * @srv = RPC Server instance
                    483:  * @blob = Map to this BLOB element
                    484:  * return: -1 error or 0 ok
                    485:  */
                    486: inline int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
                    487: /*
                    488:  * rpc_srv_blobUnmap() Unmap blob memory region 
                    489:  * @blob = Mapped BLOB element
                    490:  * return: none
                    491:  */
                    492: inline void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
                    493: /*
                    494:  * rpc_srv_blobFree() Free blob from disk & memory
                    495:  * @srv = RPC Server instance
                    496:  * @blob = Mapped BLOB element
                    497:  * return: -1 error or 0 ok
                    498:  */
                    499: inline int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
                    500: 
                    501: /*
                    502:  * rpc_srv_registerBLOB() Register new BLOB to server
                    503:  * @srv = RPC Server instance
                    504:  * @len = BLOB length
                    505:  * return: NULL error or new registered BLOB
                    506:  */
                    507: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len);
                    508: /*
                    509:  * rpc_srv_unregisterBLOB() Unregister BLOB from server
                    510:  * @srv = RPC Server instance
                    511:  * @var = BLOB Variable for unregister
                    512:  * return: -1 error, 0 not found call, 1 unregister ok
                    513:  */
                    514: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
                    515: /*
                    516:  * rpc_srv_getBLOB() Get registered BLOB 
                    517:  * @srv = RPC Server instance
                    518:  * @var = hash for variable
                    519:  * return: NULL not found, !=NULL return blob var
                    520:  */
                    521: inline rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
                    522: 
                    523: /*
                    524:  * rpc_srv_sendBLOB() Send mapped BLOB to client
                    525:  * @cli = Client instance
                    526:  * @blob = Mapped BLOB element
                    527:  * return: -1 error, 0 ok
                    528:  */
                    529: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
                    530: /*
                    531:  * rpc_srv_recvBLOB() Receive BLOB from client
                    532:  * @cli = Client instance
                    533:  * @blob = Mapped BLOB element
                    534:  * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
                    535:  */
                    536: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
                    537: 
                    538: /*
                    539:  * rpc_cli_sendBLOB() Send BLOB to server
                    540:  * @cli = Client instance
                    541:  * @var = BLOB variable
                    542:  * @data = BLOB data
                    543:  * return: -1 error, 0 ok, 1 remote error
                    544:  */
                    545: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, rpc_val_t * __restrict var, void * __restrict data);
                    546: /*
                    547:  * rpc_cli_recvBLOB() Receive BLOB from server
                    548:  * @cli = Client instance
                    549:  * @var = BLOB variable
                    550:  * @data = BLOB data, must be free after use!
                    551:  * return: -1 error, 0 ok, 1 remote error
                    552:  */
                    553: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, rpc_val_t * __restrict var, void ** data);
                    554: /*
                    555:  * rpc_cli_delBLOB() Delete BLOB from server
                    556:  * @cli = Client instance
                    557:  * @var = BLOB variable
                    558:  * return: -1 error, 0 ok, 1 remote error
                    559:  */
                    560: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, rpc_val_t * __restrict var);
                    561: /*
                    562:  * rpc_cli_getBLOB() Receive BLOB from server and Delete after that.
                    563:  * @cli = Client instance
                    564:  * @var = BLOB variable
                    565:  * @data = BLOB data, must be free after use!
                    566:  * return: -1 error, 0 ok, >0 remote error
                    567:  */
                    568: inline int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, rpc_val_t * __restrict var, void ** data);
                    569: 
                    570: 
                    571: 
1.1       misho     572: /* RPC Client side functions */
                    573: 
                    574: /*
                    575:  * rpc_cli_openClient() Connect to RPC Server
                    576:  * @ProgID = ProgramID for RPC session request
                    577:  * @ProcID = ProcessID for RPC session request
                    578:  * @family = Family socket type, AF_INET or AF_INET6
                    579:  * @csHost = Host name or IP address for bind server
                    580:  * @Port = Port for bind server, if Port == 0 default port is selected
                    581:  * return: NULL == error or !=NULL connection to RPC server established
                    582:  */
                    583: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID, u_short family, 
                    584:                const char *csHost, u_short Port);
                    585: /*
                    586:  * rpc_cli_closeClient() Close connection to RPC server and free resources
                    587:  * @cli = RPC Client session
                    588:  * return: none
                    589:  */
                    590: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
                    591: /*
                    592:  * rpc_cli_execCall() Execute RPC call
                    593:  * @cli = RPC Client session
                    594:  * @csModule = Module name, if NULL self binary
                    595:  * @csFunc = Function name for execute
                    596:  * @in_argc = IN count of arguments
                    597:  * @in_vals = IN RPC call array of rpc values
                    598:  * @out_argc = OUT returned count of arguments
                    599:  * @out_vals = OUT returned array of rpc values, must be free after use (see rpc_cli_freeVals())
                    600:  * return: -1 error or != -1 ok result
                    601:  */
                    602: int rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, int in_argc, 
                    603:                rpc_val_t * __restrict in_vals, int *out_argc, rpc_val_t ** __restrict out_vals);
                    604: /*
                    605:  * rpc_cli_freeVals() Free rpc_val_t array returned from RPC call
                    606:  * @args = Number of arguments in array
                    607:  * @vals = Value elements
                    608:  * return: none
                    609:  */
                    610: inline void rpc_cli_freeVals(int args, rpc_val_t *vals);
                    611: 
                    612: 
1.2       misho     613: /*
                    614:  * rpc_cli_openBLOBClient() Connect to BLOB Server
                    615:  * @rpccli = RPC Client session
                    616:  * @Port = Port for bind server, if Port == 0 default port is selected
                    617:  * return: NULL == error or !=NULL connection to BLOB server established
                    618:  */
                    619: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port);
                    620: /*
                    621:  * rpc_cli_closeBLOBClient() Close connection to BLOB server and free resources
                    622:  * @cli = BLOB Client session
                    623:  * return: none
                    624:  */
                    625: void rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli);
                    626: 
                    627: 
1.1       misho     628: #endif

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