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 1.1.1.1.2.1 2010/06/18 13:36:01 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_SRVSHUTDOWN "rpcServerShutdown"
31: #define CALL_SRVCLIENTS "rpcServerClients"
32: #define CALL_SRVCALLS "rpcServerCalls"
33: #define CALL_SRVSESSIONS "rpcServerSessions"
34:
35:
36: /* RPC types */
37:
38: typedef enum {
39: empty, // empty -> variable is not set
40: buffer, string, array, // buffer -> uint8_t*; string -> int8_t*; array -> char**;
41: size, offset, datetime, // size -> size_t; offset -> off_t; datetime -> time_t;
42: real, bigreal, // real -> float; bigreal -> double;
43: u8, u16, u32, u64, // unsigned integers ...
44: i8, i16, i32, i64 // integers ...
45: } rpc_type_t;
46:
47: /* RPC value */
48:
49: typedef struct {
50: rpc_type_t val_type;
51: size_t val_len;
52: union {
53: uint8_t *buffer;
54: int8_t *string;
55: int8_t **array;
56: size_t size;
57: off_t offset;
58: time_t datetime;
59: float real;
60: double bigreal;
61: uint8_t u8;
62: uint16_t u16;
63: uint32_t u32;
64: uint64_t u64;
65: int8_t i8;
66: int16_t i16;
67: int32_t i32;
68: int64_t i64;
69: } val;
70: } __packed rpc_val_t;
71:
72: #define RPC_TYPE_VAL(vl) ((vl)->val_type)
73: #define RPC_LEN_VAL(vl) ((vl)->val_len)
74: #define RPC_EMPTY_VAL(vl) ((vl)->val_type == empty)
75:
76: #define RPC_GET_BUF(vl) (assert((vl)->val_type == buffer), (vl)->val.buffer)
77: #define RPC_GET_STR(vl) (assert((vl)->val_type == string), (vl)->val.string)
78: #define RPC_GET_ARRAY(vl) (assert((vl)->val_type == array), (vl)->val.array)
79: #define RPC_GET_SIZE(vl) (assert((vl)->val_type == size), (vl)->val.size)
80: #define RPC_GET_OFF(vl) (assert((vl)->val_type == offset), (vl)->val.offset)
81: #define RPC_GET_TIME(vl) (assert((vl)->val_type == datetime), (vl)->val.datetime)
82: #define RPC_GET_REAL(vl) (assert((vl)->val_type == real), (vl)->val.real)
83: #define RPC_GET_BREAL(vl) (assert((vl)->val_type == bigreal), (vl)->val.bigreal)
84: #define RPC_GET_U8(vl) (assert((vl)->val_type == u8), (vl)->val.u8)
85: #define RPC_GET_U16(vl) (assert((vl)->val_type == u16), (vl)->val.u16)
86: #define RPC_GET_U32(vl) (assert((vl)->val_type == u32), (vl)->val.u32)
87: #define RPC_GET_U64(vl) (assert((vl)->val_type == u64), (vl)->val.u64)
88: #define RPC_GET_I8(vl) (assert((vl)->val_type == i8), (vl)->val.i8)
89: #define RPC_GET_I16(vl) (assert((vl)->val_type == i16), (vl)->val.i16)
90: #define RPC_GET_I32(vl) (assert((vl)->val_type == i32), (vl)->val.i32)
91: #define RPC_GET_I64(vl) (assert((vl)->val_type == i64), (vl)->val.i64)
92:
93: #define RPC_SET_BUF(vl, v, l) do { rpc_val_t *val = (vl); assert(val); val->val.buffer = malloc(l); \
94: if (val->val.buffer) { \
95: val->val_type = buffer; val->val_len = l; \
96: memcpy(val->val.buffer, v, l); \
97: } } while (0)
98: #define RPC_SET_STR(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val.string = (int8_t*) strdup(v); \
99: if (val->val.string) { \
100: val->val_type = string; val->val_len = strlen(v) + 1; \
101: } } while (0)
102: #define RPC_SET_ARRAY(vl, v, n, l) do { rpc_val_t *val = (vl); assert(val); val->val.array = calloc(n, l); \
103: if (val->val.array) { \
104: val->val_type = array; val->val_len = n * l; \
105: memcpy(val->val.array, v, val->val_len); \
106: } } while (0)
107: #define RPC_SET_SIZE(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = size; val->val.size = v; \
108: val->val_len = sizeof(size_t); } while (0)
109: #define RPC_SET_OFF(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = offset; val->val.offset = v; \
110: val->val_len = sizeof(off_t); } while (0)
111: #define RPC_SET_TIME(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = datetime; val->val.datetime = v; \
112: val->val_len = sizeof(time_t); } while (0)
113: #define RPC_SET_REAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = real; val->val.real = v; \
114: val->val_len = sizeof(float); } while (0)
115: #define RPC_SET_BREAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = bigreal; val->val.bigreal = v; \
116: val->val_len = sizeof(double); } while (0)
117: #define RPC_SET_U8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u8; val->val.u8 = v; \
118: val->val_len = sizeof(uint8_t); } while (0)
119: #define RPC_SET_U16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u16; val->val.u16 = v; \
120: val->val_len = sizeof(uint16_t); } while (0)
121: #define RPC_SET_U32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u32; val->val.u32 = v; \
122: val->val_len = sizeof(uint32_t); } while (0)
123: #define RPC_SET_U64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u64; val->val.u64 = v; \
124: val->val_len = sizeof(uint64_t); } while (0)
125: #define RPC_SET_I8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i8; val->val.i8 = v; \
126: val->val_len = sizeof(int8_t); } while (0)
127: #define RPC_SET_I16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i16; val->val.i16 = v; \
128: val->val_len = sizeof(int16_t); } while (0)
129: #define RPC_SET_I32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i32; val->val.i32 = v; \
130: val->val_len = sizeof(int32_t); } while (0)
131: #define RPC_SET_I64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i64; val->val.i64 = v; \
132: val->val_len = sizeof(int64_t); } while (0)
133:
134: #define RPC_FREE_VAL(vl) do { rpc_val_t *val = (vl); assert(val); \
135: if (val->val_type == buffer && val->val.buffer) { \
136: free(val->val.buffer); \
137: val->val.buffer = NULL; \
138: } \
139: if (val->val_type == string && val->val.string) { \
140: free(val->val.string); \
141: val->val.string = NULL; \
142: } \
143: if (val->val_type == array && val->val.array) { \
144: free(val->val.array); \
145: val->val.array = NULL; \
146: } \
147: val->val_type = val->val_len = 0; \
148: } while (0)
149:
150:
151: #define RPC_CALLBACK_CHECK_ARGS(f, n) do { \
152: if (f->func_args != n) { \
153: rpc_SetErr(22, "Error:: different number of arguments!\n"); \
154: return -1; \
155: } \
156: } while (0)
157: #define RPC_CALLBACK_CHECK_INPUT(s, f) do { \
158: if (!s || !f) { \
159: rpc_SetErr(22, "Error:: invalid callback parameters ...\n"); \
160: return -1; \
161: } \
162: } while (0)
163:
164:
165: /* RPC session identification */
166:
167: typedef struct {
168: uint8_t sess_version;
169: uint32_t sess_program;
170: uint32_t sess_process;
171: } __packed rpc_sess_t;
172:
173:
174: /* Server managment RPC functions ... */
175:
176: // RPC function registration element!
177: typedef struct tagRPCFunc {
178: uint16_t func_tag;
179: uint32_t func_hash;
180: int8_t func_file[MAXPATHLEN];
181: int8_t func_name[UCHAR_MAX + 1];
182:
183: int8_t func_args;
184: rpc_val_t *func_vals;
185:
186: struct tagRPCFunc *func_next;
187: } rpc_func_t;
188:
189:
190: /* Network RPC packet - Client request */
191:
192: struct tagRPCCall {
193: rpc_sess_t call_session;
194: uint16_t call_tag;
195: uint32_t call_hash;
196: uint8_t call_argc;
197: } __packed;
198:
199: /* Network RPC packet - Server response */
200:
201: struct tagRPCRet {
202: rpc_sess_t ret_session;
203: uint16_t ret_tag;
204: uint32_t ret_hash;
205: int32_t ret_retcode;
206: int32_t ret_errno;
207: uint8_t ret_argc;
208: } __packed;
209:
210: /* Network RPC client & server elements */
211:
212: typedef struct {
213: struct sockaddr cli_sa; // host info
214: int cli_sock; // socket
215: pthread_t cli_tid; // TID of thread
216:
217: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
218: } rpc_cli_t;
219:
220: typedef struct {
221: int srv_numcli; // maximum concurent client connections
222: rpc_cli_t srv_server; // server socket
223:
224: rpc_sess_t srv_session; // RPC session registration info
225:
226: rpc_cli_t *srv_clients; // connected client sockets
227:
228: rpc_func_t *srv_funcs; // registered functions list
229: } rpc_srv_t;
230:
231:
232: typedef int (*rpc_callback_t)(void * const, rpc_func_t *, int, rpc_val_t *);
233:
234:
235: // -----------------------------------------------------------------------
236:
237: /* Error support functions */
238:
239: // cli_GetErrno() Get error code of last operation
240: inline int cli_GetErrno();
241: // cli_GetError() Get error text of last operation
242: inline const char *cli_GetError();
243:
244:
245: /* RPC Server side functions */
246:
247: /*
248: * rpc_srv_initServer() Init & create RPC Server
249: * @regProgID = ProgramID for authentication & recognition
250: * @regProcID = ProcessID for authentication & recognition
251: * @concurentClients = Concurent clients at same time to this server
252: * @family = Family socket type, AF_INET or AF_INET6
253: * @csHost = Host name or IP address for bind server, if NULL any address
254: * @Port = Port for bind server, if Port == 0 default port is selected
255: * return: NULL == error or !=NULL bind and created RPC server instance
256: */
257: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
258: u_short family, const char *csHost, u_short Port);
259: /*
260: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
261: * @srv = RPC Server instance
262: * return: none
263: */
264: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
265: /*
266: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
267: * @srv = RPC Server instance
268: * return: -1 error or 0 ok, infinite loop ...
269: */
270: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
271:
272: /*
273: * rpc_srv_registerCall() Register call to RPC server
274: * @srv = RPC Server instance
275: * @csModule = Module name, if NULL self binary
276: * @csFunc = Function name
277: * @args = Number of function arguments
278: * return: -1 error or 0 register ok
279: */
280: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
281: unsigned char args);
282: /*
283: * rpc_srv_unregisterCall() Unregister call from RPC server
284: * @srv = RPC Server instance
285: * @csModule = Module name, if NULL self binary
286: * @csFunc = Function name
287: * return: -1 error, 0 not found call, 1 unregister ok
288: */
289: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
290: /*
291: * rpc_srv_getFunc() Get registered call from RPC server by Name
292: * @srv = RPC Server instance
293: * @csModule = Module name, if NULL self binary
294: * @csFunc = Function name
295: * return: NULL not found call, !=NULL return call
296: */
297: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
298: /*
299: * rpc_srv_getCall() Get registered call from RPC server
300: * @srv = RPC Server instance
301: * @tag = tag for function
302: * @hash = hash for function
303: * return: NULL not found call, !=NULL return call
304: */
305: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
306: /*
307: * rpc_srv_execCall() Execute registered call from RPC server
308: * @data = RPC const data
309: * @call = Register RPC call
310: * @rpc = IN RPC call structure
311: * @args = IN RPC call array of rpc values
312: * return: -1 error, !=-1 ok
313: */
314: int rpc_srv_execCall(void * const data, rpc_func_t * __restrict call,
315: struct tagRPCCall * __restrict rpc, rpc_val_t * __restrict args);
316:
317:
318: /*
319: * rpc_srv_declValsCall() Declare return variables for RPC call
320: * @call = RPC function call
321: * @return_vals = Number of return variables
322: * return: -1 error, !=-1 ok
323: */
324: inline int rpc_srv_declValsCall(rpc_func_t * __restrict call, int return_vals);
325: /*
326: * rpc_srv_freeValsCall() Free return variables for RPC call
327: * @call = RPC function call
328: * return: none
329: */
330: inline void rpc_srv_freeValsCall(rpc_func_t * __restrict call);
331: /*
332: * rpc_srv_copyValsCall() Copy return variables for RPC call to new variable
333: * @call = RPC function call
334: * @newvals = New allocated variables array, must be free after use
335: * return: -1 error, !=-1 Returned number of copied RPC variables
336: */
337: inline int rpc_srv_copyValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict newvals);
338: /*
339: * rpc_srv_delValsCall() Clean values from return variables of RPC call
340: * @call = RPC function call
341: * return: -1 error, !=-1 Returned number of cleaned RPC variables
342: */
343: inline int rpc_srv_delValsCall(rpc_func_t * __restrict call);
344: /*
345: * rpc_srv_getValsCall() Get return variables for RPC call
346: * @call = RPC function call
347: * @vals = Returned variables, may be NULL
348: * return: -1 error, !=-1 Number of returned variables
349: */
350: inline int rpc_srv_getValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict vals);
351:
352:
353: /* RPC Client side functions */
354:
355: /*
356: * rpc_cli_openClient() Connect to RPC Server
357: * @ProgID = ProgramID for RPC session request
358: * @ProcID = ProcessID for RPC session request
359: * @family = Family socket type, AF_INET or AF_INET6
360: * @csHost = Host name or IP address for bind server
361: * @Port = Port for bind server, if Port == 0 default port is selected
362: * return: NULL == error or !=NULL connection to RPC server established
363: */
364: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID, u_short family,
365: const char *csHost, u_short Port);
366: /*
367: * rpc_cli_closeClient() Close connection to RPC server and free resources
368: * @cli = RPC Client session
369: * return: none
370: */
371: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
372: /*
373: * rpc_cli_execCall() Execute RPC call
374: * @cli = RPC Client session
375: * @csModule = Module name, if NULL self binary
376: * @csFunc = Function name for execute
377: * @in_argc = IN count of arguments
378: * @in_vals = IN RPC call array of rpc values
379: * @out_argc = OUT returned count of arguments
380: * @out_vals = OUT returned array of rpc values, must be free after use (see rpc_cli_freeVals())
381: * return: -1 error or != -1 ok result
382: */
383: int rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, int in_argc,
384: rpc_val_t * __restrict in_vals, int *out_argc, rpc_val_t ** __restrict out_vals);
385: /*
386: * rpc_cli_freeVals() Free rpc_val_t array returned from RPC call
387: * @args = Number of arguments in array
388: * @vals = Value elements
389: * return: none
390: */
391: inline void rpc_cli_freeVals(int args, rpc_val_t *vals);
392:
393:
394: #endif
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