Multithreaded RPC Server in White Box Linux 3 environment

Posted by dba477 on May 15, 2005 8:31 AM EDT
LXer; By Boris Derzhavets
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Technique developed in [1] was tested in RHL 9 environment. Version of glibc in Red Hat Linux 9 is 2.3.2-11.9. I've got compilation failure attempting to compile file square_svc.c from [1] in White Box Linux 3 environment. Version of glibc differs from RHL 9's version and is 2.3.2-95.20. Following bellow is modified version of square_svc.c source code.This version of square_svc.c allows to build multithreaded RPC Server in White Box Linux 3 environment exactly as advised in [1]. References. 1.

/*                                                          square_svc.c
 * Please do not edit this file.
 * It was generated using rpcgen.
#include "square.h"
#include <stdio.h>
#include <stdlib.h>
#include <rpc/pmap_clnt.h>
#include <string.h>
#include <memory.h>
#include <sys/socket.h>
#include <netinet/in.h>
#ifndef SIG_PF
#define SIG_PF void(*)(int)
struct thr_data
struct svc_req *rqstp;
SVCXPRT *transp;
} ;

pthread_t p_thread; pthread_attr_t attr; /* Procedure to be run by thread */ void * serv_request(void *data) { struct thr_data *ptr_data = (struct thr_data *)data; { union { square_in squareproc_2_arg; } argument; union { square_out squareproc_2_res; } result; bool_t retval; xdrproc_t _xdr_argument, _xdr_result; bool_t (*local)(char *, void *, struct svc_req *); struct svc_req *rqstp = ptr_data->rqstp; register SVCXPRT *transp = ptr_data->transp; switch (rqstp->rq_proc) { case NULLPROC: (void) svc_sendreply (transp, (xdrproc_t) xdr_void, (char *)NULL); return; case SQUAREPROC: _xdr_argument = (xdrproc_t) xdr_square_in; _xdr_result = (xdrproc_t) xdr_square_out; local = (bool_t (*) (char *, void *, struct svc_req *))squareproc_2_svc; break; default: svcerr_noproc (transp); return; } memset ((char *)&argument, 0, sizeof (argument)); if (!svc_getargs (transp, (xdrproc_t) _xdr_argument, (caddr_t) &argument)) { svcerr_decode (transp); return; } retval = (bool_t) (*local)((char *)&argument, (void *)&result, rqstp); if (retval > 0 && !svc_sendreply(transp, (xdrproc_t) _xdr_result, (char *)&result)) { svcerr_systemerr (transp); } if (!svc_freeargs (transp, (xdrproc_t) _xdr_argument, (caddr_t) &argument)) { fprintf (stderr, "%s", "unable to free arguments"); exit (1); } if (!square_prog_2_freeresult (transp, _xdr_result, (caddr_t) &result)) fprintf (stderr, "%s", "unable to free results"); return; } } /* New code for square_prog_2 */ static void square_prog_2(struct svc_req *rqstp, register SVCXPRT *transp) { struct data_str { struct svc_req *rqstp; SVCXPRT *transp; } *data_ptr=(struct data_str*)malloc(sizeof(struct data_str)); { data_ptr->rqstp = rqstp; data_ptr->transp = transp; pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED); pthread_create(&p_thread,&attr,serv_request,(void *)data_ptr); } } int main (int argc, char **argv) { register SVCXPRT *transp; pmap_unset (SQUARE_PROG, SQUARE_VERS); transp = svcudp_create(RPC_ANYSOCK); if (transp == NULL) { fprintf (stderr, "%s", "cannot create udp service."); exit(1); } if (!svc_register(transp, SQUARE_PROG, SQUARE_VERS, square_prog_2, IPPROTO_UDP)) { fprintf (stderr, "%s", "unable to register (SQUARE_PROG, SQUARE_VERS, udp)."); exit(1); } transp = svctcp_create(RPC_ANYSOCK, 0, 0); if (transp == NULL) { fprintf (stderr, "%s", "cannot create tcp service."); exit(1); } if (!svc_register(transp, SQUARE_PROG, SQUARE_VERS, square_prog_2, IPPROTO_TCP)) { fprintf (stderr, "%s", "unable to register (SQUARE_PROG, SQUARE_VERS, tcp)."); exit(1); } svc_run (); fprintf (stderr, "%s", "svc_run returned"); exit (1); /* NOTREACHED */ }

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