| /* @(#)pmap_getport.c 2.2 88/08/01 4.0 RPCSRC */ |
| /* |
| * 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 |
| */ |
| #if !defined(lint) && defined(SCCSIDS) |
| static char sccsid[] = "@(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro"; |
| #endif |
| |
| /* |
| * pmap_getport.c |
| * Client interface to pmap rpc service. |
| * |
| * Copyright (C) 1984, Sun Microsystems, Inc. |
| */ |
| |
| #include <stdbool.h> |
| #include <unistd.h> |
| #include <rpc/rpc.h> |
| #include <rpc/pmap_prot.h> |
| #include <rpc/pmap_clnt.h> |
| #include <sys/socket.h> |
| |
| static const struct timeval timeout = |
| {5, 0}; |
| static const struct timeval tottimeout = |
| {60, 0}; |
| |
| /* |
| * Create a socket that is locally bound to a non-reserve port. For |
| * any failures, -1 is returned which will cause the RPC code to |
| * create the socket. |
| */ |
| int |
| internal_function |
| __get_socket (struct sockaddr_in *saddr) |
| { |
| int so = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (so < 0) |
| return -1; |
| |
| struct sockaddr_in laddr; |
| socklen_t namelen = sizeof (laddr); |
| laddr.sin_family = AF_INET; |
| laddr.sin_port = 0; |
| laddr.sin_addr.s_addr = htonl (INADDR_ANY); |
| |
| int cc = __bind (so, (struct sockaddr *) &laddr, namelen); |
| if (__builtin_expect (cc < 0, 0)) |
| { |
| fail: |
| __close (so); |
| return -1; |
| } |
| |
| cc = __connect (so, (struct sockaddr *) saddr, namelen); |
| if (__builtin_expect (cc < 0, 0)) |
| goto fail; |
| |
| return so; |
| } |
| |
| |
| /* |
| * Find the mapped port for program,version. |
| * Calls the pmap service remotely to do the lookup. |
| * Returns 0 if no map exists. |
| */ |
| u_short |
| pmap_getport (address, program, version, protocol) |
| struct sockaddr_in *address; |
| u_long program; |
| u_long version; |
| u_int protocol; |
| { |
| u_short port = 0; |
| int socket = -1; |
| CLIENT *client; |
| struct pmap parms; |
| bool closeit = false; |
| |
| address->sin_port = htons (PMAPPORT); |
| if (protocol == IPPROTO_TCP) |
| { |
| /* Don't need a reserved port to get ports from the portmapper. */ |
| socket = __get_socket(address); |
| if (socket != -1) |
| closeit = true; |
| client = INTUSE(clnttcp_create) (address, PMAPPROG, PMAPVERS, &socket, |
| RPCSMALLMSGSIZE, RPCSMALLMSGSIZE); |
| } |
| else |
| client = INTUSE(clntudp_bufcreate) (address, PMAPPROG, PMAPVERS, timeout, |
| &socket, RPCSMALLMSGSIZE, |
| RPCSMALLMSGSIZE); |
| if (client != (CLIENT *) NULL) |
| { |
| struct rpc_createerr *ce = &get_rpc_createerr (); |
| parms.pm_prog = program; |
| parms.pm_vers = version; |
| parms.pm_prot = protocol; |
| parms.pm_port = 0; /* not needed or used */ |
| if (CLNT_CALL (client, PMAPPROC_GETPORT, (xdrproc_t)INTUSE(xdr_pmap), |
| (caddr_t)&parms, (xdrproc_t)INTUSE(xdr_u_short), |
| (caddr_t)&port, tottimeout) != RPC_SUCCESS) |
| { |
| ce->cf_stat = RPC_PMAPFAILURE; |
| clnt_geterr (client, &ce->cf_error); |
| } |
| else if (port == 0) |
| { |
| ce->cf_stat = RPC_PROGNOTREGISTERED; |
| } |
| CLNT_DESTROY (client); |
| } |
| /* We only need to close the socket here if we opened it. */ |
| if (closeit) |
| (void) __close (socket); |
| address->sin_port = 0; |
| return port; |
| } |
| libc_hidden_def (pmap_getport) |