63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include "pmap.h"
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#include "clnt.h"
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#include <rpc/rpc.h>
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static struct timeval timeout = { 5, 0 };
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static struct timeval tottimeout = { 60, 0 };
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bool_t xdr_pmap(XDR *xdrs, struct pmap *regs)
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{
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if (xdr_u_long(xdrs, ®s->pm_prog) &&
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xdr_u_long(xdrs, ®s->pm_vers) &&
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xdr_u_long(xdrs, ®s->pm_prot))
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return (xdr_u_long(xdrs, ®s->pm_port));
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return (FALSE);
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}
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/*
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* Find the mapped port for program,version.
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* Calls the pmap service remotely to do the lookup.
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* Returns 0 if no map exists.
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*/
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unsigned short pmap_getport(struct sockaddr_in *address, unsigned long program, unsigned long version, unsigned int protocol)
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{
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unsigned short port = 0;
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int socket = -1;
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register CLIENT *client = RT_NULL;
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struct pmap parms;
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address->sin_port = htons((unsigned short)PMAPPORT);
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if (protocol == IPPROTO_UDP)
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client = clntudp_bufcreate(address, PMAPPROG, PMAPVERS, timeout,
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&socket, RPCSMALLMSGSIZE,
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RPCSMALLMSGSIZE);
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if (client != (CLIENT *) NULL)
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{
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parms.pm_prog = program;
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parms.pm_vers = version;
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parms.pm_prot = protocol;
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parms.pm_port = 0; /* not needed or used */
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if (CLNT_CALL(client, PMAPPROC_GETPORT, (xdrproc_t)xdr_pmap, (char*)&parms,
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(xdrproc_t)xdr_u_short, (char*)&port, tottimeout) != RPC_SUCCESS)
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{
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rt_kprintf("pmap failure\n");
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}
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CLNT_DESTROY(client);
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}
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(void) lwip_close(socket);
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address->sin_port = 0;
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return (port);
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}
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