portmap.c
上传用户:nvosite88
上传日期:2007-01-17
资源大小:4983k
文件大小:11k
- /* portmap.c - rpc portmap daemon */
- /* Copyright 1984-2001 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * Copyright (c) 1984 by Sun Microsystems, Inc.
- */
- /*
- * portmap.c, Implements the program,version to port number mapping for rpc.
- */
- /*
- * 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
- */
- /*
- modification history
- --------------------
- 01q,05nov01,vvv fixed compilation warning
- 01p,15oct01,rae merge from truestack ver 01q, base 01o (AE / 5_X)
- 01o,15sep93,kdl changed svcudp_create() call to only pass one param (SPR #2427)
- 01n,11aug93,jmm Changed ioctl.h and socket.h to sys/ioctl.h and sys/socket.h
- 01m,04jun92,wmd added forward declarations required for gcc960 v2.0.
- 01l,26may92,rrr the tree shuffle
- 01k,04oct91,rrr passed through the ansification filter
- -changed includes to have absolute path from h/
- -changed VOID to void
- -changed copyright notice
- 01j,11jan91,shl added keyword ENCAP_PARMS and RMTCALLARGS
- 01i,25oct90,dnw removed include of utime.h.
- 01h,11may90,yao added missing modification history (01g) for the last checkin.
- 01g,09may90,yao typecasted malloc to (char *).
- 01f,19apr90,hjb de-linted.
- 01e,27oct89,hjb changed exit (1) to taskSuspend (0).
- 01d,05apr88,gae changed fprintf() to printErr().
- 01c,24nov87,gae removed include of netdb.h.
- 01b,24oct87,dnw changed call to rpcInit() to rpcTaskInit().
- */
- #include "rpc/rpc.h"
- #include "rpc/pmap_prot.h"
- #include "sys/socket.h"
- #include "sys/ioctl.h"
- #include "vxWorks.h"
- #include "memLib.h"
- #include "memPartLib.h"
- #include "rpcLib.h"
- #include "sockLib.h"
- #include "stdio.h"
- #include "unistd.h"
- #include "taskLib.h"
- #include "stdlib.h"
- #include "rpc/get_myaddr.h"
- void reg_service();
- void pmapRegister ();
- LOCAL void callit();
- static int debugging = 0;
- void
- portmapd ()
- {
- SVCXPRT *xprt;
- int sock;
- struct sockaddr_in addr;
- int len = sizeof(struct sockaddr_in);
- rpcTaskInit ();
- if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
- perror("portmap cannot create socket");
- taskSuspend (0);
- }
- addr.sin_addr.s_addr = 0;
- addr.sin_family = AF_INET;
- addr.sin_port = htons((u_short) PMAPPORT);
- if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
- perror("portmap cannot bind");
- taskSuspend (0);
- }
- if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
- printErr ("couldn't do udp_createn");
- taskSuspend (0);
- }
- if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
- perror("portmap cannot create socket");
- taskSuspend (0);
- }
- if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
- perror("portmap cannot bind");
- taskSuspend (0);
- }
- if ((xprt = svctcp_create(sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE))
- == (SVCXPRT *)NULL) {
- printErr ("couldn't do tcp_createn");
- taskSuspend (0);
- }
- (void) svc_register (xprt, PMAPPROG, PMAPVERS, reg_service, (int)NULL);
- svc_run();
- printErr ("run_svc returned unexpectedlyn");
- abort();
- }
- struct pmaplist *pmaplist;
- static struct pmaplist *
- find_service(prog, vers, prot)
- u_long prog;
- u_long vers;
- {
- register struct pmaplist *hit = NULL;
- register struct pmaplist *pml;
- for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
- if ((pml->pml_map.pm_prog != prog) ||
- (pml->pml_map.pm_prot != prot))
- continue;
- hit = pml;
- if (pml->pml_map.pm_vers == vers)
- break;
- }
- return (hit);
- }
- /*
- * 1 OK, 0 not
- */
- void reg_service(rqstp, xprt)
- struct svc_req *rqstp;
- SVCXPRT *xprt;
- {
- struct pmap reg;
- struct pmaplist *pml, *prevpml, *fnd;
- int ans, port;
- caddr_t t;
- switch ((int)rqstp->rq_proc) {
- case PMAPPROC_NULL:
- /*
- * Null proc call
- */
- if ((!svc_sendreply(xprt, xdr_void, (char *)NULL)) &&
- debugging) {
- abort();
- }
- break;
- case PMAPPROC_SET:
- /*
- * Set a program,version to port mapping
- */
- if (!svc_getargs(xprt, xdr_pmap, ®))
- svcerr_decode(xprt);
- else {
- /*
- * check to see if already used
- * find_service returns a hit even if
- * the versions don't match, so check for it
- */
- fnd = find_service(reg.pm_prog, reg.pm_vers,
- (int) reg.pm_prot);
- if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
- if (fnd->pml_map.pm_port == reg.pm_port) {
- ans = 1;
- goto done;
- }
- else {
- ans = 0;
- goto done;
- }
- } else {
- /*
- * add to END of list
- */
- pml = (struct pmaplist *)
- KHEAP_ALLOC((u_int)sizeof(struct pmaplist));
- pml->pml_map = reg;
- pml->pml_next = 0;
- if (pmaplist == 0) {
- pmaplist = pml;
- } else {
- for (fnd= pmaplist; fnd->pml_next != 0;
- fnd = fnd->pml_next);
- fnd->pml_next = pml;
- }
- ans = 1;
- }
- done:
- if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
- debugging) {
- printErr ("svc_sendreplyn");
- abort();
- }
- }
- break;
- case PMAPPROC_UNSET:
- /*
- * Remove a program,version to port mapping.
- */
- if (!svc_getargs(xprt, xdr_pmap, ®))
- svcerr_decode(xprt);
- else {
- ans = 0;
- for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
- if ((pml->pml_map.pm_prog != reg.pm_prog) ||
- (pml->pml_map.pm_vers != reg.pm_vers)) {
- /* both pml & prevpml move forwards */
- prevpml = pml;
- pml = pml->pml_next;
- continue;
- }
- /* found it; pml moves forward, prevpml stays */
- ans = 1;
- t = (caddr_t)pml;
- pml = pml->pml_next;
- if (prevpml == NULL)
- pmaplist = pml;
- else
- prevpml->pml_next = pml;
- KHEAP_FREE(t);
- }
- if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
- debugging) {
- printErr ("svc_sendreplyn");
- abort();
- }
- }
- break;
- case PMAPPROC_GETPORT:
- /*
- * Lookup the mapping for a program,version and return its port
- */
- if (!svc_getargs(xprt, xdr_pmap, ®))
- svcerr_decode(xprt);
- else {
- fnd = find_service(reg.pm_prog, reg.pm_vers,
- (int)reg.pm_prot);
- if (fnd)
- port = fnd->pml_map.pm_port;
- else
- port = 0;
- if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
- debugging) {
- printErr ("svc_sendreplyn");
- abort();
- }
- }
- break;
- case PMAPPROC_DUMP:
- /*
- * Return the current set of mapped program,version
- */
- if (!svc_getargs(xprt, xdr_void, NULL))
- svcerr_decode(xprt);
- else {
- if ((!svc_sendreply(xprt, xdr_pmaplist,
- (caddr_t)&pmaplist)) && debugging) {
- printErr ("svc_sendreplyn");
- abort();
- }
- }
- break;
- case PMAPPROC_CALLIT:
- /*
- * Calls a procedure on the local machine. If the requested
- * procedure is not registered this procedure does not return
- * error information!!
- * This procedure is only supported on rpc/udp and calls via
- * rpc/udp. It passes null authentication parameters.
- */
- callit(rqstp, xprt);
- break;
- default:
- svcerr_noproc(xprt);
- break;
- }
- }
- /*
- * Stuff for the rmtcall service
- */
- #define ARGSIZE 9000
- typedef struct encap_parms {
- u_long arglen;
- char *args;
- } ENCAP_PARMS;
- static bool_t
- xdr_encap_parms(xdrs, epp)
- XDR *xdrs;
- struct encap_parms *epp;
- {
- return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen),
- (u_int) ARGSIZE));
- }
- typedef struct rmtcallargs {
- u_long rmt_prog;
- u_long rmt_vers;
- u_long rmt_port;
- u_long rmt_proc;
- struct encap_parms rmt_args;
- } RMTCALLARGS;
- static bool_t
- xdr_rmtcall_args(xdrs, cap)
- register XDR *xdrs;
- register struct rmtcallargs *cap;
- {
- /* does not get a port number */
- if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
- xdr_u_long(xdrs, &(cap->rmt_vers)) &&
- xdr_u_long(xdrs, &(cap->rmt_proc))) {
- return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
- }
- return (FALSE);
- }
- static bool_t
- xdr_rmtcall_result(xdrs, cap)
- register XDR *xdrs;
- register struct rmtcallargs *cap;
- {
- if (xdr_u_long(xdrs, &(cap->rmt_port)))
- return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
- return (FALSE);
- }
- /*
- * only worries about the struct encap_parms part of struct rmtcallargs.
- * The arglen must already be set!!
- */
- static bool_t
- xdr_opaque_parms(xdrs, cap)
- XDR *xdrs;
- struct rmtcallargs *cap;
- {
- return (xdr_opaque(xdrs, cap->rmt_args.args,
- (u_int)cap->rmt_args.arglen));
- }
- /*
- * This routine finds and sets the length of incoming opaque paraters
- * and then calls xdr_opaque_parms.
- */
- static bool_t
- xdr_len_opaque_parms(xdrs, cap)
- register XDR *xdrs;
- struct rmtcallargs *cap;
- {
- register u_int beginpos, lowpos, highpos, currpos, pos;
- beginpos = lowpos = pos = xdr_getpos(xdrs);
- highpos = lowpos + ARGSIZE;
- while ((int)(highpos - lowpos) >= 0) {
- currpos = (lowpos + highpos) / 2;
- if (xdr_setpos(xdrs, currpos)) {
- pos = currpos;
- lowpos = currpos + 1;
- } else {
- highpos = currpos - 1;
- }
- }
- xdr_setpos(xdrs, beginpos);
- cap->rmt_args.arglen = pos - beginpos;
- return (xdr_opaque_parms(xdrs, cap));
- }
- /*
- * Call a remote procedure service
- * This procedure is very quiet when things go wrong.
- * The proc is written to support broadcast rpc. In the broadcast case,
- * a machine should shut-up instead of complain, less the requestor be
- * overrun with complaints at the expense of not hearing a valid reply ...
- */
- static void
- callit(rqstp, xprt)
- struct svc_req *rqstp;
- SVCXPRT *xprt;
- {
- char buf[2000];
- struct rmtcallargs a;
- struct pmaplist *pml;
- u_short port;
- struct sockaddr_in me;
- int socket = -1;
- CLIENT *client;
- struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred;
- struct timeval timeout;
- timeout.tv_sec = 5;
- timeout.tv_usec = 0;
- a.rmt_args.args = buf;
- if (!svc_getargs(xprt, xdr_rmtcall_args, &a))
- return;
- if ((pml = find_service(a.rmt_prog, a.rmt_vers, IPPROTO_UDP)) == NULL)
- return;
- port = pml->pml_map.pm_port;
- get_myaddress(&me);
- me.sin_port = htons(port);
- client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &socket);
- if (client != (CLIENT *)NULL) {
- if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {
- client->cl_auth = authunix_create(au->aup_machname,
- au->aup_uid, au->aup_gid, (int) au->aup_len,
- au->aup_gids);
- }
- a.rmt_port = (u_long)port;
- if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
- xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) {
- svc_sendreply(xprt, xdr_rmtcall_result, (char *) &a);
- }
- AUTH_DESTROY(client->cl_auth);
- clnt_destroy(client);
- }
- (void)close(socket);
- }