diff options
Diffstat (limited to 'lib/libc/rpc/svc_simple.c')
-rw-r--r-- | lib/libc/rpc/svc_simple.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/lib/libc/rpc/svc_simple.c b/lib/libc/rpc/svc_simple.c new file mode 100644 index 0000000..cf00727 --- /dev/null +++ b/lib/libc/rpc/svc_simple.c @@ -0,0 +1,313 @@ +/* $NetBSD: svc_simple.c,v 1.20 2000/07/06 03:10:35 christos Exp $ */ + +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ +/* + * Copyright (c) 1986-1991 by Sun Microsystems Inc. + */ + +/* #pragma ident "@(#)svc_simple.c 1.18 94/04/24 SMI" */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * svc_simple.c + * Simplified front end to rpc. + */ + +/* + * This interface creates a virtual listener for all the services + * started thru rpc_reg(). It listens on the same endpoint for + * all the services and then executes the corresponding service + * for the given prognum and procnum. + */ + +#include "namespace.h" +#include "reentrant.h" +#include <sys/types.h> +#include <rpc/rpc.h> +#include <rpc/nettype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <err.h> +#include "un-namespace.h" + +#include "rpc_com.h" +#include "mt_misc.h" + +static void universal(struct svc_req *, SVCXPRT *); + +static struct proglst { + char *(*p_progname)(char *); + rpcprog_t p_prognum; + rpcvers_t p_versnum; + rpcproc_t p_procnum; + SVCXPRT *p_transp; + char *p_netid; + char *p_xdrbuf; + int p_recvsz; + xdrproc_t p_inproc, p_outproc; + struct proglst *p_nxt; +} *proglst; + +static const char rpc_reg_err[] = "%s: %s"; +static const char rpc_reg_msg[] = "rpc_reg: "; +static const char __reg_err1[] = "can't find appropriate transport"; +static const char __reg_err2[] = "can't get protocol info"; +static const char __reg_err3[] = "unsupported transport size"; +static const char __no_mem_str[] = "out of memory"; + +/* + * For simplified, easy to use kind of rpc interfaces. + * nettype indicates the type of transport on which the service will be + * listening. Used for conservation of the system resource. Only one + * handle is created for all the services (actually one of each netid) + * and same xdrbuf is used for same netid. The size of the arguments + * is also limited by the recvsize for that transport, even if it is + * a COTS transport. This may be wrong, but for cases like these, they + * should not use the simplified interfaces like this. + */ + +int +rpc_reg(prognum, versnum, procnum, progname, inproc, outproc, nettype) + rpcprog_t prognum; /* program number */ + rpcvers_t versnum; /* version number */ + rpcproc_t procnum; /* procedure number */ + char *(*progname)(char *); /* Server routine */ + xdrproc_t inproc, outproc; /* in/out XDR procedures */ + char *nettype; /* nettype */ +{ + struct netconfig *nconf; + int done = FALSE; + void *handle; + + + if (procnum == NULLPROC) { + warnx("%s can't reassign procedure number %u", rpc_reg_msg, + NULLPROC); + return (-1); + } + + if (nettype == NULL) + nettype = "netpath"; /* The default behavior */ + if ((handle = __rpc_setconf(nettype)) == NULL) { + warnx(rpc_reg_err, rpc_reg_msg, __reg_err1); + return (-1); + } +/* VARIABLES PROTECTED BY proglst_lock: proglst */ + mutex_lock(&proglst_lock); + while ((nconf = __rpc_getconf(handle)) != NULL) { + struct proglst *pl; + SVCXPRT *svcxprt; + int madenow; + u_int recvsz; + char *xdrbuf; + char *netid; + + madenow = FALSE; + svcxprt = NULL; + recvsz = 0; + xdrbuf = netid = NULL; + for (pl = proglst; pl; pl = pl->p_nxt) { + if (strcmp(pl->p_netid, nconf->nc_netid) == 0) { + svcxprt = pl->p_transp; + xdrbuf = pl->p_xdrbuf; + recvsz = pl->p_recvsz; + netid = pl->p_netid; + break; + } + } + + if (svcxprt == NULL) { + struct __rpc_sockinfo si; + + svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); + if (svcxprt == NULL) + continue; + if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) { + warnx(rpc_reg_err, rpc_reg_msg, __reg_err2); + SVC_DESTROY(svcxprt); + continue; + } + recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0); + if (recvsz == 0) { + warnx(rpc_reg_err, rpc_reg_msg, __reg_err3); + SVC_DESTROY(svcxprt); + continue; + } + if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) || + ((netid = strdup(nconf->nc_netid)) == NULL)) { + warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); + if (xdrbuf != NULL) + free(xdrbuf); + if (netid != NULL) + free(netid); + SVC_DESTROY(svcxprt); + break; + } + madenow = TRUE; + } + /* + * Check if this (program, version, netid) had already been + * registered. The check may save a few RPC calls to rpcbind + */ + for (pl = proglst; pl; pl = pl->p_nxt) + if ((pl->p_prognum == prognum) && + (pl->p_versnum == versnum) && + (strcmp(pl->p_netid, netid) == 0)) + break; + if (pl == NULL) { /* Not yet */ + (void) rpcb_unset(prognum, versnum, nconf); + } else { + /* so that svc_reg does not call rpcb_set() */ + nconf = NULL; + } + + if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) { + warnx("%s couldn't register prog %u vers %u for %s", + rpc_reg_msg, (unsigned)prognum, + (unsigned)versnum, netid); + if (madenow) { + SVC_DESTROY(svcxprt); + free(xdrbuf); + free(netid); + } + continue; + } + + pl = malloc(sizeof (struct proglst)); + if (pl == NULL) { + warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); + if (madenow) { + SVC_DESTROY(svcxprt); + free(xdrbuf); + free(netid); + } + break; + } + pl->p_progname = progname; + pl->p_prognum = prognum; + pl->p_versnum = versnum; + pl->p_procnum = procnum; + pl->p_inproc = inproc; + pl->p_outproc = outproc; + pl->p_transp = svcxprt; + pl->p_xdrbuf = xdrbuf; + pl->p_recvsz = recvsz; + pl->p_netid = netid; + pl->p_nxt = proglst; + proglst = pl; + done = TRUE; + } + __rpc_endconf(handle); + mutex_unlock(&proglst_lock); + + if (done == FALSE) { + warnx("%s cant find suitable transport for %s", + rpc_reg_msg, nettype); + return (-1); + } + return (0); +} + +/* + * The universal handler for the services registered using registerrpc. + * It handles both the connectionless and the connection oriented cases. + */ + +static void +universal(rqstp, transp) + struct svc_req *rqstp; + SVCXPRT *transp; +{ + rpcprog_t prog; + rpcvers_t vers; + rpcproc_t proc; + char *outdata; + char *xdrbuf; + struct proglst *pl; + + /* + * enforce "procnum 0 is echo" convention + */ + if (rqstp->rq_proc == NULLPROC) { + if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) == + FALSE) { + warnx("svc_sendreply failed"); + } + return; + } + prog = rqstp->rq_prog; + vers = rqstp->rq_vers; + proc = rqstp->rq_proc; + mutex_lock(&proglst_lock); + for (pl = proglst; pl; pl = pl->p_nxt) + if (pl->p_prognum == prog && pl->p_procnum == proc && + pl->p_versnum == vers && + (strcmp(pl->p_netid, transp->xp_netid) == 0)) { + /* decode arguments into a CLEAN buffer */ + xdrbuf = pl->p_xdrbuf; + /* Zero the arguments: reqd ! */ + (void) memset(xdrbuf, 0, sizeof (pl->p_recvsz)); + /* + * Assuming that sizeof (xdrbuf) would be enough + * for the arguments; if not then the program + * may bomb. BEWARE! + */ + if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { + svcerr_decode(transp); + mutex_unlock(&proglst_lock); + return; + } + outdata = (*(pl->p_progname))(xdrbuf); + if (outdata == NULL && + pl->p_outproc != (xdrproc_t) xdr_void){ + /* there was an error */ + mutex_unlock(&proglst_lock); + return; + } + if (!svc_sendreply(transp, pl->p_outproc, outdata)) { + warnx( + "rpc: rpc_reg trouble replying to prog %u vers %u", + (unsigned)prog, (unsigned)vers); + mutex_unlock(&proglst_lock); + return; + } + /* free the decoded arguments */ + (void)svc_freeargs(transp, pl->p_inproc, xdrbuf); + mutex_unlock(&proglst_lock); + return; + } + mutex_unlock(&proglst_lock); + /* This should never happen */ + warnx("rpc: rpc_reg: never registered prog %u vers %u", + (unsigned)prog, (unsigned)vers); + return; +} |