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 1.1.1.1.2.3 2010/06/23 07:47:25 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, blob, // buffer -> uint8_t*; string -> int8_t*; blob -> void*(+socket);
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: void *blob;
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_BLOB_CHUNKS(vl, n) ((vl)->val_len / (n) + ((vl)->val_len % (n)) ? 1 : 0)
75: #define RPC_EMPTY_VAL(vl) ((vl)->val_type == empty)
76:
77: #define RPC_GET_BUF(vl) (assert((vl)->val_type == buffer), (vl)->val.buffer)
78: #define RPC_GET_STR(vl) (assert((vl)->val_type == string), (vl)->val.string)
79: #define RPC_GET_BLOB(vl) (assert((vl)->val_type == blob), (vl)->val.blob)
80: #define RPC_GET_SIZE(vl) (assert((vl)->val_type == size), (vl)->val.size)
81: #define RPC_GET_OFF(vl) (assert((vl)->val_type == offset), (vl)->val.offset)
82: #define RPC_GET_TIME(vl) (assert((vl)->val_type == datetime), (vl)->val.datetime)
83: #define RPC_GET_REAL(vl) (assert((vl)->val_type == real), (vl)->val.real)
84: #define RPC_GET_BREAL(vl) (assert((vl)->val_type == bigreal), (vl)->val.bigreal)
85: #define RPC_GET_U8(vl) (assert((vl)->val_type == u8), (vl)->val.u8)
86: #define RPC_GET_U16(vl) (assert((vl)->val_type == u16), (vl)->val.u16)
87: #define RPC_GET_U32(vl) (assert((vl)->val_type == u32), (vl)->val.u32)
88: #define RPC_GET_U64(vl) (assert((vl)->val_type == u64), (vl)->val.u64)
89: #define RPC_GET_I8(vl) (assert((vl)->val_type == i8), (vl)->val.i8)
90: #define RPC_GET_I16(vl) (assert((vl)->val_type == i16), (vl)->val.i16)
91: #define RPC_GET_I32(vl) (assert((vl)->val_type == i32), (vl)->val.i32)
92: #define RPC_GET_I64(vl) (assert((vl)->val_type == i64), (vl)->val.i64)
93:
94: #define RPC_SET_BUF(vl, v, l) do { rpc_val_t *val = (vl); assert(val); val->val.buffer = malloc(l); \
95: if (val->val.buffer) { \
96: val->val_type = buffer; val->val_len = l; \
97: memcpy(val->val.buffer, v, l); \
98: } } while (0)
99: #define RPC_SET_STR(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val.string = (int8_t*) strdup(v); \
100: if (val->val.string) { \
101: val->val_type = string; val->val_len = strlen(v) + 1; \
102: } } while (0)
103: #define RPC_SET_BLOB(vl, v, l) do { rpc_val_t *val = (vl); assert(val); val->val.blob = realloc(val->val.blob, l); \
104: if (val->val.blob) { \
105: val->val_type = blob; val->val_len = l; \
106: memcpy(val->val.blob, v, l); \
107: } } while (0)
108: #define RPC_SET_SIZE(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = size; val->val.size = v; \
109: val->val_len = sizeof(size_t); } while (0)
110: #define RPC_SET_OFF(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = offset; val->val.offset = v; \
111: val->val_len = sizeof(off_t); } while (0)
112: #define RPC_SET_TIME(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = datetime; val->val.datetime = v; \
113: val->val_len = sizeof(time_t); } while (0)
114: #define RPC_SET_REAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = real; val->val.real = v; \
115: val->val_len = sizeof(float); } while (0)
116: #define RPC_SET_BREAL(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = bigreal; val->val.bigreal = v; \
117: val->val_len = sizeof(double); } while (0)
118: #define RPC_SET_U8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u8; val->val.u8 = v; \
119: val->val_len = sizeof(uint8_t); } while (0)
120: #define RPC_SET_U16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u16; val->val.u16 = v; \
121: val->val_len = sizeof(uint16_t); } while (0)
122: #define RPC_SET_U32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u32; val->val.u32 = v; \
123: val->val_len = sizeof(uint32_t); } while (0)
124: #define RPC_SET_U64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = u64; val->val.u64 = v; \
125: val->val_len = sizeof(uint64_t); } while (0)
126: #define RPC_SET_I8(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i8; val->val.i8 = v; \
127: val->val_len = sizeof(int8_t); } while (0)
128: #define RPC_SET_I16(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i16; val->val.i16 = v; \
129: val->val_len = sizeof(int16_t); } while (0)
130: #define RPC_SET_I32(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i32; val->val.i32 = v; \
131: val->val_len = sizeof(int32_t); } while (0)
132: #define RPC_SET_I64(vl, v) do { rpc_val_t *val = (vl); assert(val); val->val_type = i64; val->val.i64 = v; \
133: val->val_len = sizeof(int64_t); } while (0)
134:
135: #define RPC_FREE_VAL(vl) do { rpc_val_t *val = (vl); assert(val); \
136: if (val->val_type == buffer && val->val.buffer) { \
137: free(val->val.buffer); \
138: val->val.buffer = NULL; \
139: } \
140: if (val->val_type == string && val->val.string) { \
141: free(val->val.string); \
142: val->val.string = NULL; \
143: } \
144: if (val->val_type == array && val->val.array) { \
145: free(val->val.array); \
146: val->val.array = NULL; \
147: } \
148: val->val_type = val->val_len = 0; \
149: } while (0)
150:
151:
152: #define RPC_CALLBACK_CHK_NUM_ARGS(f, n) do { \
153: if (f->func_args != n) { \
154: rpc_SetErr(22, "Error:: different number of arguments!\n"); \
155: return -1; \
156: } \
157: } while (0)
158: #define RPC_CALLBACK_CHECK_INPUT(s, f) do { \
159: if (!s || !f) { \
160: rpc_SetErr(22, "Error:: invalid callback parameters ...\n"); \
161: return -1; \
162: } \
163: } while (0)
164:
165:
166: /* RPC session identification */
167:
168: typedef struct {
169: uint8_t sess_version;
170: uint32_t sess_program;
171: uint32_t sess_process;
172: } __packed rpc_sess_t;
173:
174:
175: /* Server managment RPC functions ... */
176:
177: // RPC function registration element!
178: typedef struct tagRPCFunc {
179: uint16_t func_tag;
180: uint32_t func_hash;
181: int8_t func_file[MAXPATHLEN];
182: int8_t func_name[UCHAR_MAX + 1];
183:
184: int8_t func_args;
185: rpc_val_t *func_vals;
186:
187: struct tagRPCFunc *func_next;
188: } rpc_func_t;
189:
190:
191: /* Network RPC packet - Client request */
192:
193: struct tagRPCCall {
194: rpc_sess_t call_session;
195: uint16_t call_tag;
196: uint32_t call_hash;
197: uint8_t call_argc;
198: } __packed;
199:
200: /* Network RPC packet - Server response */
201:
202: struct tagRPCRet {
203: rpc_sess_t ret_session;
204: uint16_t ret_tag;
205: uint32_t ret_hash;
206: int32_t ret_retcode;
207: int32_t ret_errno;
208: uint8_t ret_argc;
209: } __packed;
210:
211: /* Network RPC client & server elements */
212:
213: typedef struct {
214: struct sockaddr cli_sa; // host info
215: int cli_sock; // socket
216: pthread_t cli_tid; // TID of thread
217:
218: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
219: } rpc_cli_t;
220:
221: typedef struct {
222: int srv_numcli; // maximum concurent client connections
223: rpc_cli_t srv_server; // server socket
224:
225: rpc_sess_t srv_session; // RPC session registration info
226:
227: rpc_cli_t *srv_clients; // connected client sockets
228:
229: rpc_func_t *srv_funcs; // registered functions list
230: } rpc_srv_t;
231:
232:
233: typedef int (*rpc_callback_t)(void * const, rpc_func_t *, int, rpc_val_t *);
234:
235:
236: // -----------------------------------------------------------------------
237:
238: /* Error support functions */
239:
240: // cli_GetErrno() Get error code of last operation
241: inline int cli_GetErrno();
242: // cli_GetError() Get error text of last operation
243: inline const char *cli_GetError();
244:
245:
246: /* RPC Server side functions */
247:
248: /*
249: * rpc_srv_initServer() Init & create RPC Server
250: * @regProgID = ProgramID for authentication & recognition
251: * @regProcID = ProcessID for authentication & recognition
252: * @concurentClients = Concurent clients at same time to this server
253: * @family = Family socket type, AF_INET or AF_INET6
254: * @csHost = Host name or IP address for bind server, if NULL any address
255: * @Port = Port for bind server, if Port == 0 default port is selected
256: * return: NULL == error or !=NULL bind and created RPC server instance
257: */
258: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
259: u_short family, const char *csHost, u_short Port);
260: /*
261: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
262: * @srv = RPC Server instance
263: * return: none
264: */
265: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
266: /*
267: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
268: * @srv = RPC Server instance
269: * return: -1 error or 0 ok, infinite loop ...
270: */
271: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
272:
273: /*
274: * rpc_srv_registerCall() Register call to RPC server
275: * @srv = RPC Server instance
276: * @csModule = Module name, if NULL self binary
277: * @csFunc = Function name
278: * @args = Number of function arguments
279: * return: -1 error or 0 register ok
280: */
281: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
282: unsigned char args);
283: /*
284: * rpc_srv_unregisterCall() Unregister call from RPC server
285: * @srv = RPC Server instance
286: * @csModule = Module name, if NULL self binary
287: * @csFunc = Function name
288: * return: -1 error, 0 not found call, 1 unregister ok
289: */
290: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
291: /*
292: * rpc_srv_getFunc() Get registered call from RPC server by Name
293: * @srv = RPC Server instance
294: * @csModule = Module name, if NULL self binary
295: * @csFunc = Function name
296: * return: NULL not found call, !=NULL return call
297: */
298: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
299: /*
300: * rpc_srv_getCall() Get registered call from RPC server
301: * @srv = RPC Server instance
302: * @tag = tag for function
303: * @hash = hash for function
304: * return: NULL not found call, !=NULL return call
305: */
306: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
307: /*
308: * rpc_srv_execCall() Execute registered call from RPC server
309: * @data = RPC const data
310: * @call = Register RPC call
311: * @rpc = IN RPC call structure
312: * @args = IN RPC call array of rpc values
313: * return: -1 error, !=-1 ok
314: */
315: int rpc_srv_execCall(void * const data, rpc_func_t * __restrict call,
316: struct tagRPCCall * __restrict rpc, rpc_val_t * __restrict args);
317:
318:
319: /*
320: * rpc_srv_declValsCall() Declare return variables for RPC call
321: * @call = RPC function call
322: * @return_vals = Number of return variables
323: * return: -1 error, !=-1 ok
324: */
325: inline int rpc_srv_declValsCall(rpc_func_t * __restrict call, int return_vals);
326: /*
327: * rpc_srv_freeValsCall() Free return variables for RPC call
328: * @call = RPC function call
329: * return: none
330: */
331: inline void rpc_srv_freeValsCall(rpc_func_t * __restrict call);
332: /*
333: * rpc_srv_copyValsCall() Copy return variables for RPC call to new variable
334: * @call = RPC function call
335: * @newvals = New allocated variables array, must be free after use
336: * return: -1 error, !=-1 Returned number of copied RPC variables
337: */
338: inline int rpc_srv_copyValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict newvals);
339: /*
340: * rpc_srv_delValsCall() Clean values from return variables of RPC call
341: * @call = RPC function call
342: * return: -1 error, !=-1 Returned number of cleaned RPC variables
343: */
344: inline int rpc_srv_delValsCall(rpc_func_t * __restrict call);
345: /*
346: * rpc_srv_getValsCall() Get return variables for RPC call
347: * @call = RPC function call
348: * @vals = Returned variables, may be NULL
349: * return: -1 error, !=-1 Number of returned variables
350: */
351: inline int rpc_srv_getValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict vals);
352:
353:
354: /* RPC Client side functions */
355:
356: /*
357: * rpc_cli_openClient() Connect to RPC Server
358: * @ProgID = ProgramID for RPC session request
359: * @ProcID = ProcessID for RPC session request
360: * @family = Family socket type, AF_INET or AF_INET6
361: * @csHost = Host name or IP address for bind server
362: * @Port = Port for bind server, if Port == 0 default port is selected
363: * return: NULL == error or !=NULL connection to RPC server established
364: */
365: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID, u_short family,
366: const char *csHost, u_short Port);
367: /*
368: * rpc_cli_closeClient() Close connection to RPC server and free resources
369: * @cli = RPC Client session
370: * return: none
371: */
372: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
373: /*
374: * rpc_cli_execCall() Execute RPC call
375: * @cli = RPC Client session
376: * @csModule = Module name, if NULL self binary
377: * @csFunc = Function name for execute
378: * @in_argc = IN count of arguments
379: * @in_vals = IN RPC call array of rpc values
380: * @out_argc = OUT returned count of arguments
381: * @out_vals = OUT returned array of rpc values, must be free after use (see rpc_cli_freeVals())
382: * return: -1 error or != -1 ok result
383: */
384: int rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, int in_argc,
385: rpc_val_t * __restrict in_vals, int *out_argc, rpc_val_t ** __restrict out_vals);
386: /*
387: * rpc_cli_freeVals() Free rpc_val_t array returned from RPC call
388: * @args = Number of arguments in array
389: * @vals = Value elements
390: * return: none
391: */
392: inline void rpc_cli_freeVals(int args, rpc_val_t *vals);
393:
394:
395: #endif
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