support/nfs/rpcdispatch.c

   1 /*
   2  * support/nfs/rcpdispatch.c
   3  *
   4  * Generic RPC dispatcher.
   5  *
   6  * Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <config.h>
  11 #endif
  12
  13 #include <stdio.h>
  14 #include <rpc/rpc.h>
  15 #include <rpc/pmap_clnt.h>
  16 #include <signal.h>
  17 #include <arpa/inet.h>
  18 #include <netdb.h>
  19 #include <string.h>
  20 #include "rpcmisc.h"
  21 #include "xlog.h"
  22
  23 void
  24 rpc_dispatch(struct svc_req *rqstp, SVCXPRT *transp,
  25                         struct rpc_dtable *dtable, int nvers,
  26                         void *argp, void *resp)
  27 {
  28         struct rpc_dentry       *dent;
  29
  30         if (((int)rqstp->rq_vers) > nvers) {
  31                 svcerr_progvers(transp, 1, nvers);
  32                 return;
  33         }
  34         dtable += (rqstp->rq_vers - 1);
  35         if (rqstp->rq_proc > dtable->nproc) {
  36                 svcerr_noproc(transp);
  37                 return;
  38         }
  39
  40         if (dtable->nproc <= rqstp->rq_proc) {
  41                 svcerr_noproc(transp);
  42                 return;
  43         }
  44
  45         dent = dtable->entries + rqstp->rq_proc;
  46
  47         if (dent->func == NULL) {
  48                 svcerr_noproc(transp);
  49                 return;
  50         }
  51
  52         memset(argp, 0, dent->xdr_arg_size);
  53         memset(resp, 0, dent->xdr_res_size);
  54
  55         if (!svc_getargs(transp, dent->xdr_arg_fn, argp)) {
  56                 svcerr_decode(transp);
  57                 return;
  58         }
  59
  60         if ((dent->func)(rqstp, argp, resp) && resp != 0) {
  61                 if (!svc_sendreply(transp, dent->xdr_res_fn, (caddr_t)resp))
  62                         svcerr_systemerr(transp);
  63         }
  64         if (!svc_freeargs(transp, dent->xdr_arg_fn, argp)) {
  65                 xlog(L_ERROR, "failed to free RPC arguments");
  66                 exit (2);
  67         }
  68 }