Annotation of libaitrpc/src/cli.c, revision 1.1
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 $
! 6: * $Id: aitcli.c,v 1.2.2.17 2010/06/09 09:32:30 misho Exp $
! 7: *
! 8: *************************************************************************/
! 9: #include "global.h"
! 10:
! 11:
! 12: /*
! 13: * rpc_cli_openClient() Connect to RPC Server
! 14: * @ProgID = ProgramID for RPC session request
! 15: * @ProcID = ProcessID for RPC session request
! 16: * @family = Family socket type, AF_INET or AF_INET6
! 17: * @csHost = Host name or IP address for bind server
! 18: * @Port = Port for bind server, if Port == 0 default port is selected
! 19: * return: NULL == error or !=NULL connection to RPC server established
! 20: */
! 21: rpc_cli_t *
! 22: rpc_cli_openClient(u_int ProgID, u_int ProcID, u_short family, const char *csHost, u_short Port)
! 23: {
! 24: rpc_cli_t *cli = NULL;
! 25: struct hostent *host = NULL;
! 26: struct sockaddr_in sin;
! 27: struct sockaddr_in6 sin6;
! 28:
! 29: if (!csHost || (family != AF_INET && family != AF_INET6)) {
! 30: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
! 31: return NULL;
! 32: }
! 33: if (!Port)
! 34: Port = RPC_DEFPORT;
! 35: if (csHost) {
! 36: host = gethostbyname2(csHost, family);
! 37: if (!host) {
! 38: rpc_SetErr(h_errno, "Error:: %s\n", hstrerror(h_errno));
! 39: return NULL;
! 40: }
! 41: }
! 42: switch (family) {
! 43: case AF_INET:
! 44: memset(&sin, 0, sizeof sin);
! 45: sin.sin_len = sizeof sin;
! 46: sin.sin_family = family;
! 47: sin.sin_port = htons(Port);
! 48: if (csHost)
! 49: memcpy(&sin.sin_addr, host->h_addr, host->h_length);
! 50: break;
! 51: case AF_INET6:
! 52: memset(&sin6, 0, sizeof sin6);
! 53: sin6.sin6_len = sizeof sin6;
! 54: sin6.sin6_family = family;
! 55: sin6.sin6_port = htons(Port);
! 56: if (csHost)
! 57: memcpy(&sin6.sin6_addr, host->h_addr, host->h_length);
! 58: break;
! 59: default:
! 60: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
! 61: return NULL;
! 62: }
! 63:
! 64: cli = malloc(sizeof(rpc_cli_t));
! 65: if (!cli) {
! 66: LOGERR;
! 67: return NULL;
! 68: } else
! 69: memset(cli, 0, sizeof(rpc_cli_t));
! 70: cli->cli_parent = malloc(sizeof(rpc_sess_t));
! 71: if (!cli->cli_parent) {
! 72: LOGERR;
! 73: free(cli);
! 74: return NULL;
! 75: } else {
! 76: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
! 77: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
! 78: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
! 79: }
! 80:
! 81: if (family == AF_INET)
! 82: memcpy(&cli->cli_sa, &sin, sizeof cli->cli_sa);
! 83: else
! 84: memcpy(&cli->cli_sa, &sin6, sizeof cli->cli_sa);
! 85: cli->cli_sock = socket(family, SOCK_STREAM, 0);
! 86: if (cli->cli_sock == -1) {
! 87: LOGERR;
! 88: free(cli->cli_parent);
! 89: free(cli);
! 90: return NULL;
! 91: }
! 92: if (connect(cli->cli_sock, &cli->cli_sa, sizeof cli->cli_sa) == -1) {
! 93: LOGERR;
! 94: free(cli->cli_parent);
! 95: free(cli);
! 96: return NULL;
! 97: }
! 98:
! 99: return cli;
! 100: }
! 101:
! 102: /*
! 103: * rpc_cli_closeClient() Close connection to RPC server and free resources
! 104: * @cli = RPC Client session
! 105: * return: none
! 106: */
! 107: void
! 108: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
! 109: {
! 110: if (!cli) {
! 111: rpc_SetErr(EINVAL, "Error:: Can`t close connection because parameter is null!\n");
! 112: return;
! 113: }
! 114:
! 115: shutdown(cli->cli_sock, SHUT_RDWR);
! 116: close(cli->cli_sock);
! 117:
! 118: if (cli->cli_parent)
! 119: free(cli->cli_parent);
! 120: free(cli);
! 121: cli = NULL;
! 122: }
! 123:
! 124:
! 125: /*
! 126: * rpc_cli_execCall() Execute RPC call
! 127: * @cli = RPC Client session
! 128: * @csModule = Module name, if NULL self binary
! 129: * @csFunc = Function name for execute
! 130: * @in_argc = IN count of arguments
! 131: * @in_vals = IN RPC call array of rpc values
! 132: * @out_argc = OUT returned count of arguments
! 133: * @out_vals = OUT returned array of rpc values, must be free after use (see rpc_cli_freeVals())
! 134: * return: -1 error or != -1 ok result
! 135: */
! 136: int
! 137: rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, int in_argc,
! 138: rpc_val_t * __restrict in_vals, int *out_argc, rpc_val_t ** __restrict out_vals)
! 139: {
! 140: fd_set fds;
! 141: u_char buf[BUFSIZ], str[MAXPATHLEN + UCHAR_MAX + 1], *data;
! 142: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
! 143: struct tagRPCRet *rrpc;
! 144: int ret = 0, Limit = 0;
! 145: register int i;
! 146: rpc_val_t *v;
! 147: struct timeval tv = { DEF_CLI_TIMEOUT, 0 };
! 148:
! 149: FD_ZERO(&fds);
! 150: memset(buf, 0, BUFSIZ);
! 151: memset(str, 0, MAXPATHLEN + UCHAR_MAX + 1);
! 152: if (!cli || !csFunc || (in_argc && !in_vals)) {
! 153: rpc_SetErr(EINVAL, "Error:: Can`t execute call because parameter is null or invalid!\n");
! 154: return -1;
! 155: }
! 156: if (csModule)
! 157: strlcpy((char*) str, csModule, MAXPATHLEN + UCHAR_MAX + 1);
! 158: strlcat((char*) str, "__", MAXPATHLEN + UCHAR_MAX + 1);
! 159: strlcat((char*) str, csFunc, MAXPATHLEN + UCHAR_MAX + 1);
! 160:
! 161: memcpy(&rpc->call_session, cli->cli_parent, sizeof rpc->call_session);
! 162: rpc->call_argc = in_argc;
! 163: rpc->call_tag = crcFletcher16((u_short*) str, (MAXPATHLEN + UCHAR_MAX + 1) / 2);
! 164: rpc->call_hash = hash_fnv((char*) str, MAXPATHLEN + UCHAR_MAX + 1);
! 165: Limit = sizeof(struct tagRPCCall);
! 166: if (in_argc) {
! 167: v = (rpc_val_t*) (buf + sizeof(struct tagRPCCall));
! 168: memcpy(v, in_vals, in_argc * sizeof(rpc_val_t));
! 169: Limit += in_argc * sizeof(rpc_val_t);
! 170: data = (u_char*) v + in_argc * sizeof(rpc_val_t);
! 171: for (i = 0; i < in_argc; i++) {
! 172: switch (in_vals[i].val_type) {
! 173: case buffer:
! 174: if (Limit + in_vals[i].val_len > BUFSIZ) {
! 175: ret = -7;
! 176: break;
! 177: }
! 178:
! 179: memcpy(data, in_vals[i].val.buffer, in_vals[i].val_len);
! 180: v[i].val.buffer = (uint8_t*) ((void*) data - (void*) v);
! 181: data += in_vals[i].val_len;
! 182: Limit += in_vals[i].val_len;
! 183: break;
! 184: case string:
! 185: if (Limit + in_vals[i].val_len + 1 > BUFSIZ) {
! 186: ret = -7;
! 187: break;
! 188: }
! 189:
! 190: memcpy(data, in_vals[i].val.string, in_vals[i].val_len);
! 191: v[i].val.string = (int8_t*) ((void*) data - (void*) v);
! 192: data += in_vals[i].val_len;
! 193: Limit += in_vals[i].val_len;
! 194: break;
! 195: case array:
! 196: if (Limit + in_vals[i].val_len > BUFSIZ) {
! 197: ret = -7;
! 198: break;
! 199: }
! 200:
! 201: memcpy(data, in_vals[i].val.array, in_vals[i].val_len);
! 202: v[i].val.array = (int8_t**) ((void*) data - (void*) v);
! 203: data += in_vals[i].val_len;
! 204: Limit += in_vals[i].val_len;
! 205: break;
! 206: default:
! 207: break;
! 208: }
! 209: }
! 210: if (ret < 0) {
! 211: rpc_SetErr(EMSGSIZE, "Error:: in prepare RPC packet (-7) ...\n");
! 212: return ret;
! 213: }
! 214: }
! 215: if ((ret = send(cli->cli_sock, buf, Limit, 0)) == -1) {
! 216: LOGERR;
! 217: return -1;
! 218: }
! 219: if (ret != Limit) {
! 220: rpc_SetErr(EBADMSG, "Error:: in send RPC request, should be send %d bytes, really is %d\n",
! 221: Limit, ret);
! 222: return -9;
! 223: }
! 224:
! 225: FD_SET(cli->cli_sock, &fds);
! 226: if ((ret = select(cli->cli_sock + 1, &fds, NULL, NULL, &tv)) < 1) {
! 227: if (ret) {
! 228: LOGERR;
! 229: } else
! 230: rpc_SetErr(ETIMEDOUT, "Error:: timeout, no return from RPC server?\n");
! 231: return -1;
! 232: }
! 233: memset(buf, 0, BUFSIZ);
! 234: if ((ret = recv(cli->cli_sock, buf, BUFSIZ, 0)) == -1) {
! 235: LOGERR;
! 236: return -3;
! 237: }
! 238: if (!ret) // receive EOF
! 239: return 0;
! 240: if (ret < sizeof(struct tagRPCCall)) {
! 241: rpc_SetErr(EMSGSIZE, "Error:: too short RPC packet ...\n");
! 242: return -4;
! 243: } else
! 244: rrpc = (struct tagRPCRet*) buf;
! 245: // check RPC packet session info
! 246: if (memcmp(&rrpc->ret_session, cli->cli_parent, sizeof rrpc->ret_session)) {
! 247: rpc_SetErr(EINVAL, "Error:: get invalid RPC session ...\n");
! 248: return -5;
! 249: }
! 250: if (rrpc->ret_retcode < 0 && rrpc->ret_errno) {
! 251: rpc_SetErr(rrpc->ret_errno, "Error::Server side: %s\n", strerror(rrpc->ret_errno));
! 252: return -6;
! 253: }
! 254: // RPC is OK! Go decapsulate variables ...
! 255: if (rrpc->ret_argc) {
! 256: *out_argc = rrpc->ret_argc;
! 257: *out_vals = calloc(rrpc->ret_argc, sizeof(rpc_val_t));
! 258: if (!*out_vals) {
! 259: LOGERR;
! 260: *out_argc = 0;
! 261: return -1;
! 262: } else
! 263: Limit = rrpc->ret_argc * sizeof(rpc_val_t);
! 264: memcpy(*out_vals, buf + sizeof(struct tagRPCRet), Limit);
! 265: // RPC received variables types OK!
! 266: data = (u_char*) buf + sizeof(struct tagRPCRet) + Limit;
! 267: for (i = 0; i < rrpc->ret_argc; i++)
! 268: switch ((*out_vals)[i].val_type) {
! 269: case buffer:
! 270: (*out_vals)[i].val.buffer = malloc((*out_vals)[i].val_len);
! 271: if (!(*out_vals)[i].val.buffer) {
! 272: rpc_SetErr(errno, "Error:: in prepare RPC reply ...\n");
! 273: free(*out_vals);
! 274: *out_vals = NULL;
! 275: *out_argc = 0;
! 276: return -1;
! 277: } else
! 278: memcpy((*out_vals)[i].val.buffer, data, (*out_vals)[i].val_len);
! 279: data += (*out_vals)[i].val_len;
! 280: break;
! 281: case string:
! 282: (*out_vals)[i].val.string = (int8_t*) strdup((char*) data);
! 283: if (!(*out_vals)[i].val.string) {
! 284: rpc_SetErr(errno, "Error:: in prepare RPC reply ...\n");
! 285: free(*out_vals);
! 286: *out_vals = NULL;
! 287: *out_argc = 0;
! 288: return -1;
! 289: }
! 290: data += (*out_vals)[i].val_len + 1;
! 291: break;
! 292: case array:
! 293: (*out_vals)[i].val.array = malloc((*out_vals)[i].val_len);
! 294: if (!(*out_vals)[i].val.array) {
! 295: rpc_SetErr(errno, "Error:: in prepare RPC reply ...\n");
! 296: free(*out_vals);
! 297: *out_vals = NULL;
! 298: *out_argc = 0;
! 299: return -1;
! 300: } else
! 301: memcpy((*out_vals)[i].val.array, data, (*out_vals)[i].val_len);
! 302: data += (*out_vals)[i].val_len;
! 303: break;
! 304: default:
! 305: break;
! 306: }
! 307: } else {
! 308: *out_argc = 0;
! 309: *out_vals = NULL;
! 310: }
! 311:
! 312: return rrpc->ret_retcode;
! 313: }
! 314:
! 315: /*
! 316: * rpc_cli_freeVals() Free rpc_val_t array returned from RPC call
! 317: * @args = Number of arguments in array
! 318: * @vals = Value elements
! 319: * return: none
! 320: */
! 321: inline void
! 322: rpc_cli_freeVals(int args, rpc_val_t *vals)
! 323: {
! 324: register int i;
! 325:
! 326: if (!vals)
! 327: return;
! 328:
! 329: for (i = 0; i < args; i++)
! 330: RPC_FREE_VAL(&vals[i]);
! 331:
! 332: free(vals);
! 333: vals = NULL;
! 334: }
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