Annotation of libaitrpc/src/cli.c, revision 1.6.2.1

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 $
1.6.2.1 ! misho       6: * $Id: cli.c,v 1.6 2011/11/03 15:32:21 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: #include "global.h"
                     47: 
                     48: 
                     49: /*
1.2       misho      50:  * rpc_cli_openBLOBClient() Connect to BLOB Server
                     51:  * @rpccli = RPC Client session
                     52:  * @Port = Port for bind server, if Port == 0 default port is selected
                     53:  * return: NULL == error or !=NULL connection to BLOB server established
                     54:  */
                     55: rpc_cli_t *
                     56: rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port)
                     57: {
                     58:        rpc_cli_t *cli = NULL;
1.6       misho      59:        io_sockaddr_t sa;
1.5       misho      60:        int n;
1.4       misho      61: 
                     62:        if (!rpccli || 
1.6       misho      63:                        (rpccli->cli_sa.sa.sa_family != AF_INET && rpccli->cli_sa.sa.sa_family != AF_INET6 && 
                     64:                         rpccli->cli_sa.sa.sa_family != AF_LOCAL)) {
1.2       misho      65:                rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to BLOB server ...\n");
                     66:                return NULL;
                     67:        }
                     68: 
                     69:        cli = malloc(sizeof(rpc_cli_t));
                     70:        if (!cli) {
                     71:                LOGERR;
                     72:                return NULL;
                     73:        } else
                     74:                memcpy(cli, rpccli, sizeof(rpc_cli_t));
                     75: 
1.4       misho      76:        memcpy(&sa, &rpccli->cli_sa, sizeof sa);
1.6       misho      77:        switch (sa.sa.sa_family) {
1.4       misho      78:                case AF_INET:
1.6       misho      79:                        sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);
1.4       misho      80:                        break;
                     81:                case AF_INET6:
1.6       misho      82:                        sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);
1.4       misho      83:                        break;
                     84:                case AF_LOCAL:
1.6       misho      85:                        strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);
1.4       misho      86:                        break;
1.2       misho      87:        }
1.6       misho      88:        memcpy(&cli->cli_sa, &sa, sizeof sa);
1.2       misho      89: 
1.4       misho      90:        /* connect to BLOB server */
1.6       misho      91:        cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.2       misho      92:        if (cli->cli_sock == -1) {
                     93:                LOGERR;
                     94:                free(cli);
                     95:                return NULL;
                     96:        }
1.5       misho      97:        n = cli->cli_netbuf;
                     98:        if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
                     99:                LOGERR;
                    100:                close(cli->cli_sock);
                    101:                free(cli);
                    102:                return NULL;
                    103:        }
                    104:        if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
                    105:                LOGERR;
                    106:                close(cli->cli_sock);
                    107:                free(cli);
                    108:                return NULL;
                    109:        }
1.6       misho     110:        if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.2       misho     111:                LOGERR;
1.5       misho     112:                close(cli->cli_sock);
1.2       misho     113:                free(cli);
                    114:                return NULL;
                    115:        }
                    116: 
                    117:        return cli;
                    118: }
                    119: 
                    120: /*
                    121:  * rpc_cli_closeBLOBClient() Close connection to BLOB server and free resources
                    122:  * @cli = BLOB Client session
                    123:  * return: none
                    124:  */
                    125: void
                    126: rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli)
                    127: {
                    128:        if (!cli) {
                    129:                rpc_SetErr(EINVAL, "Error:: Can`t close connection because parameter is null!\n");
                    130:                return;
                    131:        }
                    132: 
                    133:        shutdown(cli->cli_sock, SHUT_RDWR);
                    134:        close(cli->cli_sock);
                    135: 
                    136:        free(cli);
                    137:        cli = NULL;
                    138: }
                    139: 
                    140: // --------------------------------------------------------------
                    141: 
                    142: /*
1.1       misho     143:  * rpc_cli_openClient() Connect to RPC Server
                    144:  * @ProgID = ProgramID for RPC session request
                    145:  * @ProcID = ProcessID for RPC session request
1.5       misho     146:  * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
1.1       misho     147:  * @family = Family socket type, AF_INET or AF_INET6
                    148:  * @csHost = Host name or IP address for bind server
                    149:  * @Port = Port for bind server, if Port == 0 default port is selected
                    150:  * return: NULL == error or !=NULL connection to RPC server established
                    151:  */
                    152: rpc_cli_t *
1.5       misho     153: rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf, u_short family, const char *csHost, u_short Port)
1.1       misho     154: {
                    155:        rpc_cli_t *cli = NULL;
                    156:        struct hostent *host = NULL;
1.6       misho     157:        io_sockaddr_t sa;
1.5       misho     158:        int n;
1.1       misho     159: 
1.4       misho     160:        if (!csHost || (family != AF_INET && family != AF_INET6 && family != AF_LOCAL)) {
1.1       misho     161:                rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
                    162:                return NULL;
                    163:        }
                    164:        if (!Port)
                    165:                Port = RPC_DEFPORT;
1.5       misho     166:        if (!netBuf)
                    167:                netBuf = BUFSIZ;
1.4       misho     168:        if (csHost && family != AF_LOCAL) {
1.1       misho     169:                host = gethostbyname2(csHost, family);
                    170:                if (!host) {
                    171:                        rpc_SetErr(h_errno, "Error:: %s\n", hstrerror(h_errno));
                    172:                        return NULL;
                    173:                }
                    174:        }
1.4       misho     175:        memset(&sa, 0, sizeof sa);
1.6       misho     176:        sa.sa.sa_family = family;
1.1       misho     177:        switch (family) {
                    178:                case AF_INET:
1.6       misho     179:                        sa.sin.sin_len = sizeof(struct sockaddr_in);
                    180:                        sa.sin.sin_port = htons(Port);
1.1       misho     181:                        if (csHost)
1.6       misho     182:                                memcpy(&sa.sin.sin_addr, host->h_addr, host->h_length);
1.1       misho     183:                        break;
                    184:                case AF_INET6:
1.6       misho     185:                        sa.sin6.sin6_len = sizeof(struct sockaddr_in6);
                    186:                        sa.sin6.sin6_port = htons(Port);
1.1       misho     187:                        if (csHost)
1.6       misho     188:                                memcpy(&sa.sin6.sin6_addr, host->h_addr, host->h_length);
1.4       misho     189:                        break;
                    190:                case AF_LOCAL:
1.6       misho     191:                        sa.sun.sun_len = sizeof(struct sockaddr_un);
1.4       misho     192:                        if (csHost)
1.6       misho     193:                                strlcpy(sa.sun.sun_path, csHost, sizeof sa.sun.sun_path);
1.1       misho     194:                        break;
                    195:                default:
                    196:                        rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
                    197:                        return NULL;
                    198:        }
                    199: 
                    200:        cli = malloc(sizeof(rpc_cli_t));
                    201:        if (!cli) {
                    202:                LOGERR;
                    203:                return NULL;
                    204:        } else
                    205:                memset(cli, 0, sizeof(rpc_cli_t));
1.5       misho     206: 
                    207:        cli->cli_netbuf = netBuf;
1.1       misho     208:        cli->cli_parent = malloc(sizeof(rpc_sess_t));
                    209:        if (!cli->cli_parent) {
                    210:                LOGERR;
                    211:                free(cli);
                    212:                return NULL;
                    213:        } else {
                    214:                ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
                    215:                ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
                    216:                ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
                    217:        }
                    218: 
1.6       misho     219:        memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.4       misho     220: 
                    221:        /* connect to RPC server */
1.1       misho     222:        cli->cli_sock = socket(family, SOCK_STREAM, 0);
                    223:        if (cli->cli_sock == -1) {
                    224:                LOGERR;
                    225:                free(cli->cli_parent);
                    226:                free(cli);
                    227:                return NULL;
                    228:        }
1.5       misho     229:        n = cli->cli_netbuf;
                    230:        if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
                    231:                LOGERR;
                    232:                close(cli->cli_sock);
                    233:                free(cli->cli_parent);
                    234:                free(cli);
                    235:                return NULL;
                    236:        }
                    237:        if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
                    238:                LOGERR;
                    239:                close(cli->cli_sock);
                    240:                free(cli->cli_parent);
                    241:                free(cli);
                    242:                return NULL;
                    243:        }
1.6       misho     244:        if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.1       misho     245:                LOGERR;
1.5       misho     246:                close(cli->cli_sock);
1.1       misho     247:                free(cli->cli_parent);
                    248:                free(cli);
                    249:                return NULL;
                    250:        }
                    251: 
                    252:        return cli;
                    253: }
                    254: 
                    255: /*
                    256:  * rpc_cli_closeClient() Close connection to RPC server and free resources
                    257:  * @cli = RPC Client session
                    258:  * return: none
                    259:  */
                    260: void
                    261: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
                    262: {
                    263:        if (!cli) {
                    264:                rpc_SetErr(EINVAL, "Error:: Can`t close connection because parameter is null!\n");
                    265:                return;
                    266:        }
                    267: 
                    268:        shutdown(cli->cli_sock, SHUT_RDWR);
                    269:        close(cli->cli_sock);
                    270: 
                    271:        if (cli->cli_parent)
                    272:                free(cli->cli_parent);
                    273:        free(cli);
                    274:        cli = NULL;
                    275: }
                    276: 
                    277: 
                    278: /*
                    279:  * rpc_cli_execCall() Execute RPC call
                    280:  * @cli = RPC Client session
                    281:  * @csModule = Module name, if NULL self binary
                    282:  * @csFunc = Function name for execute
1.4       misho     283:  * @in_vars = IN RPC call array of rpc values
1.5       misho     284:  * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
1.1       misho     285:  * return: -1 error or != -1 ok result
                    286:  */
                    287: int
1.5       misho     288: rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc, 
                    289:                array_t * __restrict in_vars, array_t ** __restrict out_vars)
1.1       misho     290: {
                    291:        fd_set fds;
1.5       misho     292:        u_char *buf, str[MAXPATHLEN + UCHAR_MAX + 1];
                    293:        struct tagRPCCall *rpc;
1.6.2.1 ! misho     294:        struct tagRPCCall *rrpc = NULL;
1.1       misho     295:        int ret = 0, Limit = 0;
1.2       misho     296:        struct timeval tv = { DEF_RPC_TIMEOUT, 0 };
1.6       misho     297:        uint16_t tag;
                    298:        uint32_t hash;
1.1       misho     299: 
1.5       misho     300:        if (!cli || !csFunc) {
1.1       misho     301:                rpc_SetErr(EINVAL, "Error:: Can`t execute call because parameter is null or invalid!\n");
                    302:                return -1;
                    303:        }
1.5       misho     304:        if (out_vars)
                    305:                *out_vars = NULL;
                    306: 
                    307:        buf = malloc(cli->cli_netbuf);
                    308:        if (!buf) {
                    309:                LOGERR;
                    310:                return -1;
                    311:        } else
                    312:                memset(buf, 0, cli->cli_netbuf);
                    313: 
1.4       misho     314:        /* build RPC call string for hash */
1.5       misho     315:        memset(str, 0, sizeof str);
1.1       misho     316:        if (csModule)
1.4       misho     317:                strlcpy((char*) str, csModule, sizeof str);
                    318:        strlcat((char*) str, "__", sizeof str);
                    319:        strlcat((char*) str, csFunc, sizeof str);
1.1       misho     320: 
1.4       misho     321:        /* prepare RPC call */
1.5       misho     322:        rpc = (struct tagRPCCall*) buf;
1.6       misho     323:        rpc_addPktSession(&rpc->call_session, cli->cli_parent);
                    324:        rpc->call_argc = htons(io_arraySize(in_vars));
                    325:        rpc->call_tag = tag = htons(crcFletcher16((u_short*) str, sizeof str / 2));
                    326:        rpc->call_hash = hash = htonl(hash_fnv((char*) str, sizeof str));
1.1       misho     327:        Limit = sizeof(struct tagRPCCall);
1.5       misho     328: 
1.6       misho     329:        if (io_arraySize(in_vars)) {
1.5       misho     330:                /* marshaling variables */
1.6       misho     331:                ret = io_vars2buffer(buf + Limit, cli->cli_netbuf - Limit, in_vars);
1.5       misho     332:                if (ret == -1) {
                    333:                        rpc_SetErr(EBADRPC, "Error:: in prepare RPC packet values (-7) ...\n");
                    334:                        free(buf);
1.3       misho     335:                        return -7;
                    336:                } else
1.5       misho     337:                        Limit += ret;
1.1       misho     338:        }
1.4       misho     339: 
1.1       misho     340:        if ((ret = send(cli->cli_sock, buf, Limit, 0)) == -1) {
                    341:                LOGERR;
1.5       misho     342:                free(buf);
1.1       misho     343:                return -1;
                    344:        }
                    345:        if (ret != Limit) {
1.5       misho     346:                rpc_SetErr(EPROCUNAVAIL, "Error:: in send RPC request, should be send %d bytes, really is %d\n", 
1.1       misho     347:                                Limit, ret);
1.5       misho     348:                free(buf);
1.1       misho     349:                return -9;
                    350:        }
                    351: 
1.5       misho     352:        /* reply from RPC server */
                    353:        FD_ZERO(&fds);
1.1       misho     354:        FD_SET(cli->cli_sock, &fds);
                    355:        if ((ret = select(cli->cli_sock + 1, &fds, NULL, NULL, &tv)) < 1) {
1.4       misho     356:                if (ret)
1.1       misho     357:                        LOGERR;
1.4       misho     358:                else
1.1       misho     359:                        rpc_SetErr(ETIMEDOUT, "Error:: timeout, no return from RPC server?\n");
1.4       misho     360: 
1.5       misho     361:                free(buf);
1.1       misho     362:                return -1;
                    363:        }
1.5       misho     364:        memset(buf, 0, cli->cli_netbuf);
                    365:        if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {
1.1       misho     366:                LOGERR;
1.5       misho     367:                free(buf);
1.1       misho     368:                return -3;
                    369:        }
1.5       misho     370:        if (!ret) {     /* receive EOF! */
                    371:                free(buf);
1.1       misho     372:                return 0;
1.5       misho     373:        }
1.6.2.1 ! misho     374:        if (ret < sizeof(struct tagRPCCall)) {
1.5       misho     375:                rpc_SetErr(ERPCMISMATCH, "Error:: too short RPC packet ...\n");
                    376:                free(buf);
1.1       misho     377:                return -4;
                    378:        } else
1.6.2.1 ! misho     379:                rrpc = (struct tagRPCCall*) buf;
1.3       misho     380:        /* check RPC packet session info */
1.6.2.1 ! misho     381:        if (rpc_chkPktSession(&rrpc->call_session, cli->cli_parent)) {
1.5       misho     382:                rpc_SetErr(ERPCMISMATCH, "Error:: get invalid RPC session ...\n");
                    383:                free(buf);
1.1       misho     384:                return -5;
1.2       misho     385:        } else
1.6.2.1 ! misho     386:                Limit = sizeof(struct tagRPCCall);
        !           387:        if (rrpc->call_tag != tag || rrpc->call_hash != hash) {
1.6       misho     388:                rpc_SetErr(ERPCMISMATCH, "Error:: get wrong RPC reply ...\n");
                    389:                free(buf);
                    390:                return -5;
                    391:        }
1.6.2.1 ! misho     392:        if (ntohl(rrpc->call_rep.ret) < 0 && ntohl(rrpc->call_rep.eno)) {
        !           393:                rpc_SetErr(ntohl(rrpc->call_rep.eno), "Error::Server side: retcode=%d #%d %s\n", 
        !           394:                                ntohl(rrpc->call_rep.ret), ntohl(rrpc->call_rep.eno), 
        !           395:                                strerror(ntohl(rrpc->call_rep.eno)));
1.5       misho     396:                free(buf);
1.1       misho     397:                return -6;
                    398:        }
1.6.2.1 ! misho     399:        if (ntohs(rrpc->call_argc) * sizeof(ait_val_t) > cli->cli_netbuf - Limit) {
1.4       misho     400:                rpc_SetErr(EMSGSIZE, "Error:: reply RPC packet is too long ...\n");
1.5       misho     401:                free(buf);
1.2       misho     402:                return -7;
1.5       misho     403:        }
                    404: 
                    405:        /* RPC is OK! Go de-marshaling variables ... */
1.6.2.1 ! misho     406:        if (ntohs(rrpc->call_argc)) {
1.6       misho     407:                *out_vars = io_buffer2vars(buf + Limit, cli->cli_netbuf - Limit, 
1.6.2.1 ! misho     408:                                ntohs(rrpc->call_argc), 0);
1.4       misho     409:                if (!*out_vars) {
1.5       misho     410:                        free(buf);
1.1       misho     411:                        return -1;
1.5       misho     412:                }
1.1       misho     413:        }
                    414: 
1.6.2.1 ! misho     415:        ret = ntohl(rrpc->call_rep.ret);
1.5       misho     416:        free(buf);
                    417:        return ret;
1.1       misho     418: }

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