1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitrpc.h,v 1.1.1.1 2010/06/18 01:48:06 misho Exp $
7: *
8: *************************************************************************/
9: #ifndef __AITRPC_H
10: #define __AITRPC_H
11:
12:
13: #include <assert.h>
14: #include <stdlib.h>
15: #include <string.h>
16: #include <sys/types.h>
17: #include <sys/param.h>
18: #include <sys/limits.h>
19: #include <sys/socket.h>
20:
21:
22: #define STRSIZ 256
23:
24: #define RPC_VERSION 1
25: #define RPC_DEFPORT 2611
26:
27:
28: /* RPC builtin registed calls */
29:
30: #define CALL_SRVCLIENTS "rpcServerClients"
31: #define CALL_SRVCALLS "rpcServerCalls"
32: #define CALL_SRVSESSIONS "rpcServerSessions"
33:
34:
35: /* RPC types */
36:
37: typedef enum {
38: empty, // empty -> variable is not set
39: buffer, string, array, // buffer -> uint8_t*; string -> int8_t*; array -> char**;
40: size, offset, datetime, // size -> size_t; offset -> off_t; datetime -> time_t;
41: real, bigreal, // real -> float; bigreal -> double;
42: u8, u16, u32, u64, // unsigned integers ...
43: i8, i16, i32, i64 // integers ...
44: } rpc_type_t;
45:
46: /* RPC value */
47:
48: typedef struct {
49: rpc_type_t val_type;
50: size_t val_len;
51: union {
52: uint8_t *buffer;
53: int8_t *string;
54: int8_t **array;
55: size_t size;
56: off_t offset;
57: time_t datetime;
58: float real;
59: double bigreal;
60: uint8_t u8;
61: uint16_t u16;
62: uint32_t u32;
63: uint64_t u64;
64: int8_t i8;
65: int16_t i16;
66: int32_t i32;
67: int64_t i64;
68: } val;
69: } __packed rpc_val_t;
70:
71: #define RPC_TYPE_VAL(vl) ((vl)->val_type)
72: #define RPC_LEN_VAL(vl) ((vl)->val_len)
73: #define RPC_EMPTY_VAL(vl) ((vl)->val_type == empty)
74:
75: #define RPC_GET_BUF(vl) (assert((vl)->val_type == buffer), (vl)->val.buffer)
76: #define RPC_GET_STR(vl) (assert((vl)->val_type == string), (vl)->val.string)
77: #define RPC_GET_ARRAY(vl) (assert((vl)->val_type == array), (vl)->val.array)
78: #define RPC_GET_SIZE(vl) (assert((vl)->val_type == size), (vl)->val.size)
79: #define RPC_GET_OFF(vl) (assert((vl)->val_type == offset), (vl)->val.offset)
80: #define RPC_GET_TIME(vl) (assert((vl)->val_type == datetime), (vl)->val.datetime)
81: #define RPC_GET_REAL(vl) (assert((vl)->val_type == real), (vl)->val.real)
82: #define RPC_GET_BREAL(vl) (assert((vl)->val_type == bigreal), (vl)->val.bigreal)
83: #define RPC_GET_U8(vl) (assert((vl)->val_type == u8), (vl)->val.u8)
84: #define RPC_GET_U16(vl) (assert((vl)->val_type == u16), (vl)->val.u16)
85: #define RPC_GET_U32(vl) (assert((vl)->val_type == u32), (vl)->val.u32)
86: #define RPC_GET_U64(vl) (assert((vl)->val_type == u64), (vl)->val.u64)
87: #define RPC_GET_I8(vl) (assert((vl)->val_type == i8), (vl)->val.i8)
88: #define RPC_GET_I16(vl) (assert((vl)->val_type == i16), (vl)->val.i16)
89: #define RPC_GET_I32(vl) (assert((vl)->val_type == i32), (vl)->val.i32)
90: #define RPC_GET_I64(vl) (assert((vl)->val_type == i64), (vl)->val.i64)
91:
92: #define RPC_SET_BUF(vl, v, l) do { rpc_val_t *val = (vl); assert(val); val->val.buffer = malloc(l); \
93: if (val->val.buffer) { \
94: val->val_type = buffer; val->val_len = l; \
95: memcpy(val->val.buffer, v, l); \
96: } } while (0)
97: #define RPC_SET_STR(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val.string = (int8_t*) strdup(v); \
98: if (val->val.string) { \
99: val->val_type = string; val->val_len = strlen(v) + 1; \
100: } } while (0)
101: #define RPC_SET_ARRAY(vl, v, n, l) do { rpc_val_t *val = (vl); assert(val); val->val.array = calloc(n, l); \
102: if (val->val.array) { \
103: val->val_type = array; val->val_len = n * l; \
104: memcpy(val->val.array, v, val->val_len); \
105: } } while (0)
106: #define RPC_SET_SIZE(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = size; val->val.size = v; \
107: val->val_len = sizeof(size_t); } while (0)
108: #define RPC_SET_OFF(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = offset; val->val.offset = v; \
109: val->val_len = sizeof(off_t); } while (0)
110: #define RPC_SET_TIME(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = datetime; val->val.datetime = v; \
111: val->val_len = sizeof(time_t); } while (0)
112: #define RPC_SET_REAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = real; val->val.real = v; \
113: val->val_len = sizeof(float); } while (0)
114: #define RPC_SET_BREAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = bigreal; val->val.bigreal = v; \
115: val->val_len = sizeof(double); } while (0)
116: #define RPC_SET_U8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u8; val->val.u8 = v; \
117: val->val_len = sizeof(uint8_t); } while (0)
118: #define RPC_SET_U16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u16; val->val.u16 = v; \
119: val->val_len = sizeof(uint16_t); } while (0)
120: #define RPC_SET_U32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u32; val->val.u32 = v; \
121: val->val_len = sizeof(uint32_t); } while (0)
122: #define RPC_SET_U64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u64; val->val.u64 = v; \
123: val->val_len = sizeof(uint64_t); } while (0)
124: #define RPC_SET_I8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i8; val->val.i8 = v; \
125: val->val_len = sizeof(int8_t); } while (0)
126: #define RPC_SET_I16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i16; val->val.i16 = v; \
127: val->val_len = sizeof(int16_t); } while (0)
128: #define RPC_SET_I32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i32; val->val.i32 = v; \
129: val->val_len = sizeof(int32_t); } while (0)
130: #define RPC_SET_I64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i64; val->val.i64 = v; \
131: val->val_len = sizeof(int64_t); } while (0)
132:
133: #define RPC_FREE_VAL(vl) do { rpc_val_t *val = (vl); assert(val); \
134: if (val->val_type == buffer && val->val.buffer) { \
135: free(val->val.buffer); \
136: val->val.buffer = NULL; \
137: } \
138: if (val->val_type == string && val->val.string) { \
139: free(val->val.string); \
140: val->val.string = NULL; \
141: } \
142: if (val->val_type == array && val->val.array) { \
143: free(val->val.array); \
144: val->val.array = NULL; \
145: } \
146: val->val_type = val->val_len = 0; \
147: } while (0)
148:
149:
150: #define RPC_CALLBACK_CHECK_ARGS(f, n) do { \
151: if (f->func_args != n) { \
152: rpc_SetErr(22, "Error:: different number of arguments!\n"); \
153: return -1; \
154: } \
155: } while(0)
156:
157:
158: /* RPC session identification */
159:
160: typedef struct {
161: uint8_t sess_version;
162: uint32_t sess_program;
163: uint32_t sess_process;
164: } __packed rpc_sess_t;
165:
166:
167: /* Server managment RPC functions ... */
168:
169: // RPC function registration element!
170: typedef struct tagRPCFunc {
171: uint16_t func_tag;
172: uint32_t func_hash;
173: int8_t func_file[MAXPATHLEN];
174: int8_t func_name[UCHAR_MAX + 1];
175:
176: int8_t func_args;
177: rpc_val_t *func_vals;
178:
179: struct tagRPCFunc *func_next;
180: } rpc_func_t;
181:
182:
183: /* Network RPC packet - Client request */
184:
185: struct tagRPCCall {
186: rpc_sess_t call_session;
187: uint16_t call_tag;
188: uint32_t call_hash;
189: uint8_t call_argc;
190: } __packed;
191:
192: /* Network RPC packet - Server response */
193:
194: struct tagRPCRet {
195: rpc_sess_t ret_session;
196: uint16_t ret_tag;
197: uint32_t ret_hash;
198: int32_t ret_retcode;
199: int32_t ret_errno;
200: uint8_t ret_argc;
201: } __packed;
202:
203: /* Network RPC client & server elements */
204:
205: typedef struct {
206: struct sockaddr cli_sa; // host info
207: int cli_sock; // socket
208: pthread_t cli_tid; // TID of thread
209:
210: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
211: } rpc_cli_t;
212:
213: typedef struct {
214: int srv_numcli; // maximum concurent client connections
215: rpc_cli_t srv_server; // server socket
216:
217: rpc_sess_t srv_session; // RPC session registration info
218:
219: rpc_cli_t *srv_clients; // connected client sockets
220:
221: rpc_func_t *srv_funcs; // registered functions list
222: } rpc_srv_t;
223:
224:
225: typedef int (*rpc_callback_t)(void * const, rpc_func_t *, int, rpc_val_t *);
226:
227:
228: // -----------------------------------------------------------------------
229:
230: /* Error support functions */
231:
232: // cli_GetErrno() Get error code of last operation
233: inline int cli_GetErrno();
234: // cli_GetError() Get error text of last operation
235: inline const char *cli_GetError();
236:
237:
238: /* RPC Server side functions */
239:
240: /*
241: * rpc_srv_initServer() Init & create RPC Server
242: * @regProgID = ProgramID for authentication & recognition
243: * @regProcID = ProcessID for authentication & recognition
244: * @concurentClients = Concurent clients at same time to this server
245: * @family = Family socket type, AF_INET or AF_INET6
246: * @csHost = Host name or IP address for bind server, if NULL any address
247: * @Port = Port for bind server, if Port == 0 default port is selected
248: * return: NULL == error or !=NULL bind and created RPC server instance
249: */
250: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
251: u_short family, const char *csHost, u_short Port);
252: /*
253: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
254: * @srv = RPC Server instance
255: * return: none
256: */
257: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
258: /*
259: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
260: * @srv = RPC Server instance
261: * return: -1 error or 0 ok, infinite loop ...
262: */
263: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
264:
265: /*
266: * rpc_srv_registerCall() Register call to RPC server
267: * @srv = RPC Server instance
268: * @csModule = Module name, if NULL self binary
269: * @csFunc = Function name
270: * @args = Number of function arguments
271: * return: -1 error or 0 register ok
272: */
273: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
274: unsigned char args);
275: /*
276: * rpc_srv_unregisterCall() Unregister call from RPC server
277: * @srv = RPC Server instance
278: * @csModule = Module name, if NULL self binary
279: * @csFunc = Function name
280: * return: -1 error, 0 not found call, 1 unregister ok
281: */
282: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
283: /*
284: * rpc_srv_getFunc() Get registered call from RPC server by Name
285: * @srv = RPC Server instance
286: * @csModule = Module name, if NULL self binary
287: * @csFunc = Function name
288: * return: NULL not found call, !=NULL return call
289: */
290: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
291: /*
292: * rpc_srv_getCall() Get registered call from RPC server
293: * @srv = RPC Server instance
294: * @tag = tag for function
295: * @hash = hash for function
296: * return: NULL not found call, !=NULL return call
297: */
298: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
299: /*
300: * rpc_srv_execCall() Execute registered call from RPC server
301: * @data = RPC const data
302: * @call = Register RPC call
303: * @rpc = IN RPC call structure
304: * @args = IN RPC call array of rpc values
305: * return: -1 error, !=-1 ok
306: */
307: int rpc_srv_execCall(void * const data, rpc_func_t * __restrict call,
308: struct tagRPCCall * __restrict rpc, rpc_val_t * __restrict args);
309:
310:
311: /*
312: * rpc_srv_declValsCall() Declare return variables for RPC call
313: * @call = RPC function call
314: * @return_vals = Number of return variables
315: * return: -1 error, !=-1 ok
316: */
317: inline int rpc_srv_declValsCall(rpc_func_t * __restrict call, int return_vals);
318: /*
319: * rpc_srv_freeValsCall() Free return variables for RPC call
320: * @call = RPC function call
321: * return: none
322: */
323: inline void rpc_srv_freeValsCall(rpc_func_t * __restrict call);
324: /*
325: * rpc_srv_copyValsCall() Copy return variables for RPC call to new variable
326: * @call = RPC function call
327: * @newvals = New allocated variables array, must be free after use
328: * return: -1 error, !=-1 Returned number of copied RPC variables
329: */
330: inline int rpc_srv_copyValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict newvals);
331: /*
332: * rpc_srv_delValsCall() Clean values from return variables of RPC call
333: * @call = RPC function call
334: * return: -1 error, !=-1 Returned number of cleaned RPC variables
335: */
336: inline int rpc_srv_delValsCall(rpc_func_t * __restrict call);
337: /*
338: * rpc_srv_getValsCall() Get return variables for RPC call
339: * @call = RPC function call
340: * @vals = Returned variables, may be NULL
341: * return: -1 error, !=-1 Number of returned variables
342: */
343: inline int rpc_srv_getValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict vals);
344:
345:
346: /* RPC Client side functions */
347:
348: /*
349: * rpc_cli_openClient() Connect to RPC Server
350: * @ProgID = ProgramID for RPC session request
351: * @ProcID = ProcessID for RPC session request
352: * @family = Family socket type, AF_INET or AF_INET6
353: * @csHost = Host name or IP address for bind server
354: * @Port = Port for bind server, if Port == 0 default port is selected
355: * return: NULL == error or !=NULL connection to RPC server established
356: */
357: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID, u_short family,
358: const char *csHost, u_short Port);
359: /*
360: * rpc_cli_closeClient() Close connection to RPC server and free resources
361: * @cli = RPC Client session
362: * return: none
363: */
364: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
365: /*
366: * rpc_cli_execCall() Execute RPC call
367: * @cli = RPC Client session
368: * @csModule = Module name, if NULL self binary
369: * @csFunc = Function name for execute
370: * @in_argc = IN count of arguments
371: * @in_vals = IN RPC call array of rpc values
372: * @out_argc = OUT returned count of arguments
373: * @out_vals = OUT returned array of rpc values, must be free after use (see rpc_cli_freeVals())
374: * return: -1 error or != -1 ok result
375: */
376: int rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, int in_argc,
377: rpc_val_t * __restrict in_vals, int *out_argc, rpc_val_t ** __restrict out_vals);
378: /*
379: * rpc_cli_freeVals() Free rpc_val_t array returned from RPC call
380: * @args = Number of arguments in array
381: * @vals = Value elements
382: * return: none
383: */
384: inline void rpc_cli_freeVals(int args, rpc_val_t *vals);
385:
386:
387: #endif
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