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c28fb3c893
* sunrpc/clnt_tcp.c (clnttcp_create): Don't close *SOCKP if it's -1. * sunrpc/clnt_simp.c (callrpc): Don't close CRP->socket if it's RPC_ANYSOCK. * sunrpc/pmap_clnt.c (pmap_set): Don't close SOCKET, since CLNT_DESTROY already has. (pmap_unset): Likewise. * sunrpc/pm_getmaps.c (pmap_getmaps): Likewise. * sunrpc/pm_getport.c (pmap_getport): Likewise. * sunrpc/pmap_rmt.c (pmap_rmtcall): Likewise. * sunrpc/portmap.c (callit): Likewise.
482 lines
11 KiB
C
482 lines
11 KiB
C
/* @(#)portmap.c 2.3 88/08/11 4.0 RPCSRC */
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#ifndef lint
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static char sccsid[] = "@(#)portmap.c 1.32 87/08/06 Copyr 1984 Sun Micro";
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#endif
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/*
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* Copyright (c) 1984 by Sun Microsystems, Inc.
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*/
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/*
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* portmap.c, Implements the program,version to port number mapping for
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* rpc.
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*/
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <stdio.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <sys/signal.h>
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char *malloc();
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int reg_service();
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void reap();
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struct pmaplist *pmaplist;
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static int debugging = 0;
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main()
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{
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SVCXPRT *xprt;
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int sock, pid, t;
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struct sockaddr_in addr;
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int len = sizeof(struct sockaddr_in);
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register struct pmaplist *pml;
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#ifndef DEBUG
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pid = fork();
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if (pid < 0) {
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perror("portmap: fork");
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exit(1);
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}
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if (pid != 0)
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exit(0);
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for (t = 0; t < 20; t++)
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close(t);
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open("/", 0);
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dup2(0, 1);
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dup2(0, 2);
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t = open("/dev/tty", 2);
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if (t >= 0) {
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ioctl(t, TIOCNOTTY, (char *)0);
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close(t);
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}
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#endif
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if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
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perror(_("portmap cannot create socket"));
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exit(1);
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}
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addr.sin_addr.s_addr = 0;
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addr.sin_family = AF_INET;
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addr.sin_port = htons(PMAPPORT);
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if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
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perror(_("portmap cannot bind"));
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exit(1);
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}
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if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
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fprintf(stderr, _("couldn't do udp_create\n"));
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exit(1);
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}
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/* make an entry for ourself */
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pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
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pml->pml_next = 0;
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pml->pml_map.pm_prog = PMAPPROG;
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pml->pml_map.pm_vers = PMAPVERS;
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pml->pml_map.pm_prot = IPPROTO_UDP;
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pml->pml_map.pm_port = PMAPPORT;
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pmaplist = pml;
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if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
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perror(_("portmap cannot create socket"));
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exit(1);
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}
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if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
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perror(_("portmap cannot bind"));
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exit(1);
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}
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if ((xprt = svctcp_create(sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE))
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== (SVCXPRT *)NULL) {
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fprintf(stderr, _("couldn't do tcp_create\n"));
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exit(1);
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}
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/* make an entry for ourself */
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pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
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pml->pml_map.pm_prog = PMAPPROG;
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pml->pml_map.pm_vers = PMAPVERS;
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pml->pml_map.pm_prot = IPPROTO_TCP;
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pml->pml_map.pm_port = PMAPPORT;
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pml->pml_next = pmaplist;
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pmaplist = pml;
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(void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE);
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(void)signal(SIGCHLD, reap);
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svc_run();
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fprintf(stderr, _("run_svc returned unexpectedly\n"));
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abort();
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}
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static struct pmaplist *
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find_service(prog, vers, prot)
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u_long prog;
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u_long vers;
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{
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register struct pmaplist *hit = NULL;
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register struct pmaplist *pml;
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for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
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if ((pml->pml_map.pm_prog != prog) ||
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(pml->pml_map.pm_prot != prot))
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continue;
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hit = pml;
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if (pml->pml_map.pm_vers == vers)
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break;
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}
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return (hit);
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}
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/*
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* 1 OK, 0 not
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*/
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reg_service(rqstp, xprt)
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struct svc_req *rqstp;
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SVCXPRT *xprt;
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{
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struct pmap reg;
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struct pmaplist *pml, *prevpml, *fnd;
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int ans, port;
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caddr_t t;
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#ifdef DEBUG
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fprintf(stderr, "server: about do a switch\n");
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#endif
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switch (rqstp->rq_proc) {
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case PMAPPROC_NULL:
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/*
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* Null proc call
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*/
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if ((!svc_sendreply(xprt, xdr_void, NULL)) && debugging) {
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abort();
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}
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break;
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case PMAPPROC_SET:
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/*
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* Set a program,version to port mapping
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*/
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if (!svc_getargs(xprt, xdr_pmap, ®))
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svcerr_decode(xprt);
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else {
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/*
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* check to see if already used
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* find_service returns a hit even if
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* the versions don't match, so check for it
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*/
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fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
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if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
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if (fnd->pml_map.pm_port == reg.pm_port) {
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ans = 1;
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goto done;
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}
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else {
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ans = 0;
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goto done;
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}
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} else {
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/*
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* add to END of list
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*/
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pml = (struct pmaplist *)
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malloc((u_int)sizeof(struct pmaplist));
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pml->pml_map = reg;
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pml->pml_next = 0;
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if (pmaplist == 0) {
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pmaplist = pml;
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} else {
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for (fnd= pmaplist; fnd->pml_next != 0;
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fnd = fnd->pml_next);
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fnd->pml_next = pml;
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}
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ans = 1;
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}
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done:
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if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
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debugging) {
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fprintf(stderr, "svc_sendreply\n");
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abort();
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}
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}
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break;
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case PMAPPROC_UNSET:
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/*
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* Remove a program,version to port mapping.
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*/
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if (!svc_getargs(xprt, xdr_pmap, ®))
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svcerr_decode(xprt);
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else {
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ans = 0;
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for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
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if ((pml->pml_map.pm_prog != reg.pm_prog) ||
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(pml->pml_map.pm_vers != reg.pm_vers)) {
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/* both pml & prevpml move forwards */
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prevpml = pml;
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pml = pml->pml_next;
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continue;
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}
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/* found it; pml moves forward, prevpml stays */
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ans = 1;
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t = (caddr_t)pml;
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pml = pml->pml_next;
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if (prevpml == NULL)
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pmaplist = pml;
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else
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prevpml->pml_next = pml;
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free(t);
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}
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if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
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debugging) {
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fprintf(stderr, "svc_sendreply\n");
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abort();
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}
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}
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break;
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case PMAPPROC_GETPORT:
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/*
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* Lookup the mapping for a program,version and return its port
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*/
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if (!svc_getargs(xprt, xdr_pmap, ®))
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svcerr_decode(xprt);
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else {
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fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
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if (fnd)
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port = fnd->pml_map.pm_port;
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else
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port = 0;
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if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
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debugging) {
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fprintf(stderr, "svc_sendreply\n");
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abort();
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}
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}
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break;
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case PMAPPROC_DUMP:
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/*
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* Return the current set of mapped program,version
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*/
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if (!svc_getargs(xprt, xdr_void, NULL))
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svcerr_decode(xprt);
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else {
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if ((!svc_sendreply(xprt, xdr_pmaplist,
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(caddr_t)&pmaplist)) && debugging) {
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fprintf(stderr, "svc_sendreply\n");
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abort();
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}
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}
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break;
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case PMAPPROC_CALLIT:
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/*
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* Calls a procedure on the local machine. If the requested
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* procedure is not registered this procedure does not return
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* error information!!
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* This procedure is only supported on rpc/udp and calls via
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* rpc/udp. It passes null authentication parameters.
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*/
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callit(rqstp, xprt);
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break;
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default:
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svcerr_noproc(xprt);
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break;
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}
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}
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/*
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* Stuff for the rmtcall service
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*/
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#define ARGSIZE 9000
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typedef struct encap_parms {
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u_long arglen;
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char *args;
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};
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static bool_t
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xdr_encap_parms(xdrs, epp)
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XDR *xdrs;
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struct encap_parms *epp;
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{
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return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE));
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}
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typedef struct rmtcallargs {
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u_long rmt_prog;
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u_long rmt_vers;
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u_long rmt_port;
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u_long rmt_proc;
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struct encap_parms rmt_args;
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};
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static bool_t
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xdr_rmtcall_args(xdrs, cap)
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register XDR *xdrs;
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register struct rmtcallargs *cap;
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{
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/* does not get a port number */
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if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
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xdr_u_long(xdrs, &(cap->rmt_vers)) &&
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xdr_u_long(xdrs, &(cap->rmt_proc))) {
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return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
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}
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return (FALSE);
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}
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static bool_t
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xdr_rmtcall_result(xdrs, cap)
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register XDR *xdrs;
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register struct rmtcallargs *cap;
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{
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if (xdr_u_long(xdrs, &(cap->rmt_port)))
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return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
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return (FALSE);
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}
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/*
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* only worries about the struct encap_parms part of struct rmtcallargs.
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* The arglen must already be set!!
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*/
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static bool_t
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xdr_opaque_parms(xdrs, cap)
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XDR *xdrs;
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struct rmtcallargs *cap;
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{
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return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
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}
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/*
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* This routine finds and sets the length of incoming opaque paraters
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* and then calls xdr_opaque_parms.
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*/
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static bool_t
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xdr_len_opaque_parms(xdrs, cap)
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register XDR *xdrs;
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struct rmtcallargs *cap;
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{
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register u_int beginpos, lowpos, highpos, currpos, pos;
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beginpos = lowpos = pos = xdr_getpos(xdrs);
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highpos = lowpos + ARGSIZE;
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while ((int)(highpos - lowpos) >= 0) {
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currpos = (lowpos + highpos) / 2;
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if (xdr_setpos(xdrs, currpos)) {
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pos = currpos;
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lowpos = currpos + 1;
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} else {
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highpos = currpos - 1;
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}
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}
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xdr_setpos(xdrs, beginpos);
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cap->rmt_args.arglen = pos - beginpos;
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return (xdr_opaque_parms(xdrs, cap));
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}
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/*
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* Call a remote procedure service
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* This procedure is very quiet when things go wrong.
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* The proc is written to support broadcast rpc. In the broadcast case,
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* a machine should shut-up instead of complain, less the requestor be
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* overrun with complaints at the expense of not hearing a valid reply ...
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*
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* This now forks so that the program & process that it calls can call
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* back to the portmapper.
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*/
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static
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callit(rqstp, xprt)
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struct svc_req *rqstp;
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SVCXPRT *xprt;
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{
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struct rmtcallargs a;
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struct pmaplist *pml;
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u_short port;
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struct sockaddr_in me;
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int pid, socket = -1;
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CLIENT *client;
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struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred;
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struct timeval timeout;
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char buf[ARGSIZE];
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timeout.tv_sec = 5;
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timeout.tv_usec = 0;
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a.rmt_args.args = buf;
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if (!svc_getargs(xprt, xdr_rmtcall_args, &a))
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return;
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if ((pml = find_service(a.rmt_prog, a.rmt_vers, IPPROTO_UDP)) == NULL)
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return;
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/*
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* fork a child to do the work. Parent immediately returns.
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* Child exits upon completion.
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*/
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if ((pid = fork()) != 0) {
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if (debugging && (pid < 0)) {
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fprintf(stderr, _("portmap CALLIT: cannot fork.\n"));
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}
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return;
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}
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port = pml->pml_map.pm_port;
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get_myaddress(&me);
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me.sin_port = htons(port);
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client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &socket);
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if (client != (CLIENT *)NULL) {
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if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {
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client->cl_auth = authunix_create(au->aup_machname,
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au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids);
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}
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a.rmt_port = (u_long)port;
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if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
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xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) {
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svc_sendreply(xprt, xdr_rmtcall_result, &a);
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}
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AUTH_DESTROY(client->cl_auth);
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clnt_destroy(client);
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}
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/* (void)close(socket); clnt_destroy already closed it */
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exit(0);
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}
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void
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reap()
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{
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while (wait3(NULL, WNOHANG, NULL) > 0);
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}
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