diff options
Diffstat (limited to 'usr.sbin/rpcbind/pmap_svc.c')
| -rw-r--r-- | usr.sbin/rpcbind/pmap_svc.c | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/usr.sbin/rpcbind/pmap_svc.c b/usr.sbin/rpcbind/pmap_svc.c new file mode 100644 index 0000000..b2cedd9 --- /dev/null +++ b/usr.sbin/rpcbind/pmap_svc.c @@ -0,0 +1,368 @@ +/* $NetBSD: pmap_svc.c,v 1.2 2000/10/20 11:49:40 fvdl Exp $ */ +/* $FreeBSD$ */ + +/* + * 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) 1984 - 1991 by Sun Microsystems, Inc. + */ + +/* #ident "@(#)pmap_svc.c 1.14 93/07/05 SMI" */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)pmap_svc.c 1.23 89/04/05 Copyr 1984 Sun Micro"; +#endif +#endif + +/* + * pmap_svc.c + * The server procedure for the version 2 portmaper. + * All the portmapper related interface from the portmap side. + */ + +#ifdef PORTMAP +#include <sys/types.h> +#include <sys/socket.h> +#include <stdio.h> +#include <rpc/rpc.h> +#include <rpc/pmap_prot.h> +#include <rpc/rpcb_prot.h> +#ifdef RPCBIND_DEBUG +#include <stdlib.h> +#endif +#include "rpcbind.h" + +static struct pmaplist *find_service_pmap __P((rpcprog_t, rpcvers_t, + rpcprot_t)); +static bool_t pmapproc_change __P((struct svc_req *, SVCXPRT *, u_long)); +static bool_t pmapproc_getport __P((struct svc_req *, SVCXPRT *)); +static bool_t pmapproc_dump __P((struct svc_req *, SVCXPRT *)); + +/* + * Called for all the version 2 inquiries. + */ +void +pmap_service(struct svc_req *rqstp, SVCXPRT *xprt) +{ + rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc); + switch (rqstp->rq_proc) { + case PMAPPROC_NULL: + /* + * Null proc call + */ +#ifdef RPCBIND_DEBUG + if (debugging) + fprintf(stderr, "PMAPPROC_NULL\n"); +#endif + check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS); + if ((!svc_sendreply(xprt, (xdrproc_t) xdr_void, NULL)) && + debugging) { + if (doabort) { + rpcbind_abort(); + } + } + break; + + case PMAPPROC_SET: + /* + * Set a program, version to port mapping + */ + pmapproc_change(rqstp, xprt, rqstp->rq_proc); + break; + + case PMAPPROC_UNSET: + /* + * Remove a program, version to port mapping. + */ + pmapproc_change(rqstp, xprt, rqstp->rq_proc); + break; + + case PMAPPROC_GETPORT: + /* + * Lookup the mapping for a program, version and return its + * port number. + */ + pmapproc_getport(rqstp, xprt); + break; + + case PMAPPROC_DUMP: + /* + * Return the current set of mapped program, version + */ +#ifdef RPCBIND_DEBUG + if (debugging) + fprintf(stderr, "PMAPPROC_DUMP\n"); +#endif + pmapproc_dump(rqstp, xprt); + 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. + */ + rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS); + break; + + default: + svcerr_noproc(xprt); + break; + } +} + +/* + * returns the item with the given program, version number. If that version + * number is not found, it returns the item with that program number, so that + * the port number is now returned to the caller. The caller when makes a + * call to this program, version number, the call will fail and it will + * return with PROGVERS_MISMATCH. The user can then determine the highest + * and the lowest version number for this program using clnt_geterr() and + * use those program version numbers. + */ +static struct pmaplist * +find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot) +{ + register struct pmaplist *hit = NULL; + register struct pmaplist *pml; + + for (pml = list_pml; 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); +} + +static bool_t +pmapproc_change(struct svc_req *rqstp, SVCXPRT *xprt, unsigned long op) +{ + struct pmap reg; + RPCB rpcbreg; + long ans; + struct sockaddr_in *who; + struct cmsgcred *cmcred; + char uidbuf[32]; + +#ifdef RPCBIND_DEBUG + if (debugging) + fprintf(stderr, "%s request for (%lu, %lu) : ", + op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET", + reg.pm_prog, reg.pm_vers); +#endif + + if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { + svcerr_decode(xprt); + return (FALSE); + } + + if (!check_access(xprt, op, ®, PMAPVERS)) { + svcerr_weakauth(xprt); + return FALSE; + } + + who = svc_getcaller(xprt); + cmcred = __svc_getcallercreds(xprt); + + /* + * Can't use getpwnam here. We might end up calling ourselves + * and looping. + */ + if (cmcred == NULL) + rpcbreg.r_owner = "unknown"; + else if (cmcred->cmcred_uid == 0) + rpcbreg.r_owner = "superuser"; + else { + /* r_owner will be strdup-ed later */ + snprintf(uidbuf, sizeof uidbuf, "%d", cmcred->cmcred_uid); + rpcbreg.r_owner = uidbuf; + } + + rpcbreg.r_prog = reg.pm_prog; + rpcbreg.r_vers = reg.pm_vers; + + if (op == PMAPPROC_SET) { + char buf[32]; + + sprintf(buf, "0.0.0.0.%d.%d", (int)((reg.pm_port >> 8) & 0xff), + (int)(reg.pm_port & 0xff)); + rpcbreg.r_addr = buf; + if (reg.pm_prot == IPPROTO_UDP) { + rpcbreg.r_netid = udptrans; + } else if (reg.pm_prot == IPPROTO_TCP) { + rpcbreg.r_netid = tcptrans; + } else { + ans = FALSE; + goto done_change; + } + ans = map_set(&rpcbreg, rpcbreg.r_owner); + } else if (op == PMAPPROC_UNSET) { + bool_t ans1, ans2; + + rpcbreg.r_addr = NULL; + rpcbreg.r_netid = tcptrans; + ans1 = map_unset(&rpcbreg, rpcbreg.r_owner); + rpcbreg.r_netid = udptrans; + ans2 = map_unset(&rpcbreg, rpcbreg.r_owner); + ans = ans1 || ans2; + } else { + ans = FALSE; + } +done_change: + if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t) &ans)) && + debugging) { + fprintf(stderr, "portmap: svc_sendreply\n"); + if (doabort) { + rpcbind_abort(); + } + } +#ifdef RPCBIND_DEBUG + if (debugging) + fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); +#endif + if (op == PMAPPROC_SET) + rpcbs_set(RPCBVERS_2_STAT, ans); + else + rpcbs_unset(RPCBVERS_2_STAT, ans); + return (TRUE); +} + +/* ARGSUSED */ +static bool_t +pmapproc_getport(struct svc_req *rqstp, SVCXPRT *xprt) +{ + struct pmap reg; + long lport; + int port = 0; + struct pmaplist *fnd; +#ifdef RPCBIND_DEBUG + char *uaddr; +#endif + + if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { + svcerr_decode(xprt); + return (FALSE); + } + + if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) { + svcerr_weakauth(xprt); + return FALSE; + } + +#ifdef RPCBIND_DEBUG + if (debugging) { + uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid), + svc_getrpccaller(xprt)); + fprintf(stderr, "PMAP_GETPORT req for (%lu, %lu, %s) from %s :", + reg.pm_prog, reg.pm_vers, + reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr); + free(uaddr); + } +#endif + fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot); + if (fnd) { + char serveuaddr[32], *ua; + int h1, h2, h3, h4, p1, p2; + char *netid; + + if (reg.pm_prot == IPPROTO_UDP) { + ua = udp_uaddr; + netid = udptrans; + } else { + ua = tcp_uaddr; /* To get the len */ + netid = tcptrans; + } + if (ua == NULL) { + goto sendreply; + } + if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3, + &h4, &p1, &p2) == 6) { + p1 = (fnd->pml_map.pm_port >> 8) & 0xff; + p2 = (fnd->pml_map.pm_port) & 0xff; + sprintf(serveuaddr, "%d.%d.%d.%d.%d.%d", + h1, h2, h3, h4, p1, p2); + if (is_bound(netid, serveuaddr)) { + port = fnd->pml_map.pm_port; + } else { /* this service is dead; delete it */ + delete_prog(reg.pm_prog); + } + } + } +sendreply: + lport = port; + if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) && + debugging) { + (void) fprintf(stderr, "portmap: svc_sendreply\n"); + if (doabort) { + rpcbind_abort(); + } + } +#ifdef RPCBIND_DEBUG + if (debugging) + fprintf(stderr, "port = %d\n", port); +#endif + rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers, + reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans, + port ? udptrans : ""); + + return (TRUE); +} + +/* ARGSUSED */ +static bool_t +pmapproc_dump(struct svc_req *rqstp, SVCXPRT *xprt) +{ + if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) { + svcerr_decode(xprt); + return (FALSE); + } + + if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) { + svcerr_weakauth(xprt); + return FALSE; + } + + if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr, + (caddr_t)&list_pml)) && debugging) { + if (debugging) + (void) fprintf(stderr, "portmap: svc_sendreply\n"); + if (doabort) { + rpcbind_abort(); + } + } + return (TRUE); +} + +#endif /* PORTMAP */ |
