1df930be7Sderaadt /*- 277baebbfSderaadt * Copyright (c) 1996 Theo de Raadt (OpenBSD). All rights reserved. 3df930be7Sderaadt * Copyright (c) 1990 The Regents of the University of California. 4df930be7Sderaadt * All rights reserved. 5df930be7Sderaadt * 6df930be7Sderaadt * Redistribution and use in source and binary forms, with or without 7df930be7Sderaadt * modification, are permitted provided that the following conditions 8df930be7Sderaadt * are met: 9df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright 10df930be7Sderaadt * notice, this list of conditions and the following disclaimer. 11df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 12df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the 13df930be7Sderaadt * documentation and/or other materials provided with the distribution. 14df930be7Sderaadt * 3. All advertising materials mentioning features or use of this software 15df930be7Sderaadt * must display the following acknowledgement: 16df930be7Sderaadt * This product includes software developed by the University of 17df930be7Sderaadt * California, Berkeley and its contributors. 18df930be7Sderaadt * 4. Neither the name of the University nor the names of its contributors 19df930be7Sderaadt * may be used to endorse or promote products derived from this software 20df930be7Sderaadt * without specific prior written permission. 21df930be7Sderaadt * 22df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32df930be7Sderaadt * SUCH DAMAGE. 33df930be7Sderaadt */ 34df930be7Sderaadt 35df930be7Sderaadt #ifndef lint 36df930be7Sderaadt char copyright[] = 37df930be7Sderaadt "@(#) Copyright (c) 1990 The Regents of the University of California.\n\ 38df930be7Sderaadt All rights reserved.\n"; 39df930be7Sderaadt #endif /* not lint */ 40df930be7Sderaadt 41df930be7Sderaadt #ifndef lint 42df930be7Sderaadt /*static char sccsid[] = "from: @(#)portmap.c 5.4 (Berkeley) 4/19/91";*/ 43*f94670b8Sderaadt static char rcsid[] = "$Id: portmap.c,v 1.9 1996/07/29 11:31:08 deraadt Exp $"; 44df930be7Sderaadt #endif /* not lint */ 45df930be7Sderaadt 46df930be7Sderaadt /* 47df930be7Sderaadt @(#)portmap.c 2.3 88/08/11 4.0 RPCSRC 48df930be7Sderaadt static char sccsid[] = "@(#)portmap.c 1.32 87/08/06 Copyr 1984 Sun Micro"; 49df930be7Sderaadt */ 50df930be7Sderaadt 51df930be7Sderaadt /* 52df930be7Sderaadt * portmap.c, Implements the program,version to port number mapping for 53df930be7Sderaadt * rpc. 54df930be7Sderaadt */ 55df930be7Sderaadt 56df930be7Sderaadt /* 57df930be7Sderaadt * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 58df930be7Sderaadt * unrestricted use provided that this legend is included on all tape 59df930be7Sderaadt * media and as a part of the software program in whole or part. Users 60df930be7Sderaadt * may copy or modify Sun RPC without charge, but are not authorized 61df930be7Sderaadt * to license or distribute it to anyone else except as part of a product or 62df930be7Sderaadt * program developed by the user. 63df930be7Sderaadt * 64df930be7Sderaadt * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 65df930be7Sderaadt * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 66df930be7Sderaadt * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 67df930be7Sderaadt * 68df930be7Sderaadt * Sun RPC is provided with no support and without any obligation on the 69df930be7Sderaadt * part of Sun Microsystems, Inc. to assist in its use, correction, 70df930be7Sderaadt * modification or enhancement. 71df930be7Sderaadt * 72df930be7Sderaadt * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 73df930be7Sderaadt * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 74df930be7Sderaadt * OR ANY PART THEREOF. 75df930be7Sderaadt * 76df930be7Sderaadt * In no event will Sun Microsystems, Inc. be liable for any lost revenue 77df930be7Sderaadt * or profits or other special, indirect and consequential damages, even if 78df930be7Sderaadt * Sun has been advised of the possibility of such damages. 79df930be7Sderaadt * 80df930be7Sderaadt * Sun Microsystems, Inc. 81df930be7Sderaadt * 2550 Garcia Avenue 82df930be7Sderaadt * Mountain View, California 94043 83df930be7Sderaadt */ 84df930be7Sderaadt 85df930be7Sderaadt #include <rpc/rpc.h> 86df930be7Sderaadt #include <rpc/pmap_prot.h> 87df930be7Sderaadt #include <stdio.h> 88df930be7Sderaadt #include <stdlib.h> 89df930be7Sderaadt #include <string.h> 90df930be7Sderaadt #include <syslog.h> 91df930be7Sderaadt #include <unistd.h> 92df930be7Sderaadt #include <netdb.h> 93df930be7Sderaadt #include <sys/socket.h> 94df930be7Sderaadt #include <sys/ioctl.h> 95df930be7Sderaadt #include <sys/wait.h> 96df930be7Sderaadt #include <sys/signal.h> 97df930be7Sderaadt #include <sys/resource.h> 9877baebbfSderaadt #include <rpcsvc/nfs_prot.h> 99df930be7Sderaadt 100df930be7Sderaadt void reg_service __P((struct svc_req *, SVCXPRT *)); 101df930be7Sderaadt void reap __P(()); 102df930be7Sderaadt static void callit __P((struct svc_req *, SVCXPRT *)); 103df930be7Sderaadt 104df930be7Sderaadt struct pmaplist *pmaplist; 105df930be7Sderaadt int debugging = 0; 106df930be7Sderaadt extern int errno; 107df930be7Sderaadt 10877baebbfSderaadt SVCXPRT *ludpxprt, *ltcpxprt; 10977baebbfSderaadt 110df930be7Sderaadt main(argc, argv) 111df930be7Sderaadt int argc; 112df930be7Sderaadt char **argv; 113df930be7Sderaadt { 114df930be7Sderaadt SVCXPRT *xprt; 11577baebbfSderaadt int sock, lsock, c; 11677baebbfSderaadt struct sockaddr_in addr, laddr; 11777baebbfSderaadt int on = 1; 118df930be7Sderaadt int len = sizeof(struct sockaddr_in); 119df930be7Sderaadt register struct pmaplist *pml; 120df930be7Sderaadt 121df930be7Sderaadt while ((c = getopt(argc, argv, "d")) != EOF) { 122df930be7Sderaadt switch (c) { 123df930be7Sderaadt 124df930be7Sderaadt case 'd': 125df930be7Sderaadt debugging = 1; 126df930be7Sderaadt break; 127df930be7Sderaadt 128df930be7Sderaadt default: 129df930be7Sderaadt (void) fprintf(stderr, "usage: %s [-d]\n", argv[0]); 130df930be7Sderaadt exit(1); 131df930be7Sderaadt } 132df930be7Sderaadt } 133df930be7Sderaadt 134df930be7Sderaadt if (!debugging && daemon(0, 0)) { 135df930be7Sderaadt (void) fprintf(stderr, "portmap: fork: %s", strerror(errno)); 136df930be7Sderaadt exit(1); 137df930be7Sderaadt } 138df930be7Sderaadt 139df930be7Sderaadt openlog("portmap", debugging ? LOG_PID | LOG_PERROR : LOG_PID, 140df930be7Sderaadt LOG_DAEMON); 141df930be7Sderaadt 14277baebbfSderaadt bzero((char *)&addr, sizeof addr); 14377baebbfSderaadt addr.sin_addr.s_addr = 0; 14477baebbfSderaadt addr.sin_family = AF_INET; 14577baebbfSderaadt addr.sin_addr.s_addr = htonl(INADDR_ANY); 14677baebbfSderaadt addr.sin_port = htons(PMAPPORT); 14777baebbfSderaadt 14877baebbfSderaadt bzero((char *)&laddr, sizeof laddr); 14977baebbfSderaadt laddr.sin_addr.s_addr = 0; 15077baebbfSderaadt laddr.sin_family = AF_INET; 15177baebbfSderaadt laddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 15277baebbfSderaadt laddr.sin_port = htons(PMAPPORT); 15377baebbfSderaadt 154df930be7Sderaadt if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { 155df930be7Sderaadt syslog(LOG_ERR, "cannot create udp socket: %m"); 156df930be7Sderaadt exit(1); 157df930be7Sderaadt } 158afeed3b4Sderaadt setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); 159df930be7Sderaadt if (bind(sock, (struct sockaddr *)&addr, len) != 0) { 160df930be7Sderaadt syslog(LOG_ERR, "cannot bind udp: %m"); 161df930be7Sderaadt exit(1); 162df930be7Sderaadt } 163df930be7Sderaadt 164df930be7Sderaadt if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) { 165df930be7Sderaadt syslog(LOG_ERR, "couldn't do udp_create"); 166df930be7Sderaadt exit(1); 167df930be7Sderaadt } 16877baebbfSderaadt 16977baebbfSderaadt if ((lsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { 17077baebbfSderaadt syslog(LOG_ERR, "cannot create udp socket: %m"); 17177baebbfSderaadt exit(1); 17277baebbfSderaadt } 17377baebbfSderaadt setsockopt(lsock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); 17477baebbfSderaadt if (bind(lsock, (struct sockaddr *)&laddr, len) != 0) { 17577baebbfSderaadt syslog(LOG_ERR, "cannot bind udp: %m"); 17677baebbfSderaadt exit(1); 17777baebbfSderaadt } 17877baebbfSderaadt 17977baebbfSderaadt if ((ludpxprt = svcudp_create(lsock)) == (SVCXPRT *)NULL) { 18077baebbfSderaadt syslog(LOG_ERR, "couldn't do udp_create"); 18177baebbfSderaadt exit(1); 18277baebbfSderaadt } 18377baebbfSderaadt 184df930be7Sderaadt /* make an entry for ourself */ 185df930be7Sderaadt pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist)); 186df930be7Sderaadt pml->pml_next = 0; 187df930be7Sderaadt pml->pml_map.pm_prog = PMAPPROG; 188df930be7Sderaadt pml->pml_map.pm_vers = PMAPVERS; 189df930be7Sderaadt pml->pml_map.pm_prot = IPPROTO_UDP; 190df930be7Sderaadt pml->pml_map.pm_port = PMAPPORT; 191df930be7Sderaadt pmaplist = pml; 192df930be7Sderaadt 193df930be7Sderaadt if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) { 194df930be7Sderaadt syslog(LOG_ERR, "cannot create tcp socket: %m"); 195df930be7Sderaadt exit(1); 196df930be7Sderaadt } 197afeed3b4Sderaadt setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); 198df930be7Sderaadt if (bind(sock, (struct sockaddr *)&addr, len) != 0) { 199da52f073Sderaadt syslog(LOG_ERR, "cannot bind tcp: %m"); 200df930be7Sderaadt exit(1); 201df930be7Sderaadt } 202df930be7Sderaadt if ((xprt = svctcp_create(sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE)) 203df930be7Sderaadt == (SVCXPRT *)NULL) { 204df930be7Sderaadt syslog(LOG_ERR, "couldn't do tcp_create"); 205df930be7Sderaadt exit(1); 206df930be7Sderaadt } 20777baebbfSderaadt 20877baebbfSderaadt if ((lsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) { 20977baebbfSderaadt syslog(LOG_ERR, "cannot create tcp socket: %m"); 21077baebbfSderaadt exit(1); 21177baebbfSderaadt } 21277baebbfSderaadt setsockopt(lsock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); 21377baebbfSderaadt if (bind(lsock, (struct sockaddr *)&laddr, len) != 0) { 214da52f073Sderaadt syslog(LOG_ERR, "cannot bind tcp: %m"); 21577baebbfSderaadt exit(1); 21677baebbfSderaadt } 21777baebbfSderaadt if ((ltcpxprt = svctcp_create(lsock, RPCSMALLMSGSIZE, 21877baebbfSderaadt RPCSMALLMSGSIZE)) == (SVCXPRT *)NULL) { 21977baebbfSderaadt syslog(LOG_ERR, "couldn't do tcp_create"); 22077baebbfSderaadt exit(1); 22177baebbfSderaadt } 22277baebbfSderaadt 223df930be7Sderaadt /* make an entry for ourself */ 224df930be7Sderaadt pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist)); 225df930be7Sderaadt pml->pml_map.pm_prog = PMAPPROG; 226df930be7Sderaadt pml->pml_map.pm_vers = PMAPVERS; 227df930be7Sderaadt pml->pml_map.pm_prot = IPPROTO_TCP; 228df930be7Sderaadt pml->pml_map.pm_port = PMAPPORT; 229df930be7Sderaadt pml->pml_next = pmaplist; 230df930be7Sderaadt pmaplist = pml; 231df930be7Sderaadt 232df930be7Sderaadt (void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE); 233df930be7Sderaadt 234df930be7Sderaadt (void)signal(SIGCHLD, reap); 235df930be7Sderaadt svc_run(); 236da52f073Sderaadt syslog(LOG_ERR, "svc_run returned unexpectedly"); 237df930be7Sderaadt abort(); 238df930be7Sderaadt } 239df930be7Sderaadt 240df930be7Sderaadt #ifndef lint 241df930be7Sderaadt /* need to override perror calls in rpc library */ 242df930be7Sderaadt void 243df930be7Sderaadt perror(what) 244df930be7Sderaadt const char *what; 245df930be7Sderaadt { 246df930be7Sderaadt 247df930be7Sderaadt syslog(LOG_ERR, "%s: %m", what); 248df930be7Sderaadt } 249df930be7Sderaadt #endif 250df930be7Sderaadt 251df930be7Sderaadt static struct pmaplist * 252df930be7Sderaadt find_service(prog, vers, prot) 253df930be7Sderaadt u_long prog, vers, prot; 254df930be7Sderaadt { 255df930be7Sderaadt register struct pmaplist *hit = NULL; 256df930be7Sderaadt register struct pmaplist *pml; 257df930be7Sderaadt 258df930be7Sderaadt for (pml = pmaplist; pml != NULL; pml = pml->pml_next) { 259df930be7Sderaadt if ((pml->pml_map.pm_prog != prog) || 260df930be7Sderaadt (pml->pml_map.pm_prot != prot)) 261df930be7Sderaadt continue; 262df930be7Sderaadt hit = pml; 263df930be7Sderaadt if (pml->pml_map.pm_vers == vers) 264df930be7Sderaadt break; 265df930be7Sderaadt } 266df930be7Sderaadt return (hit); 267df930be7Sderaadt } 268df930be7Sderaadt 269df930be7Sderaadt /* 270df930be7Sderaadt * 1 OK, 0 not 271df930be7Sderaadt */ 272df930be7Sderaadt void 273df930be7Sderaadt reg_service(rqstp, xprt) 274df930be7Sderaadt struct svc_req *rqstp; 275df930be7Sderaadt SVCXPRT *xprt; 276df930be7Sderaadt { 277df930be7Sderaadt struct pmap reg; 278df930be7Sderaadt struct pmaplist *pml, *prevpml, *fnd; 27977baebbfSderaadt struct sockaddr_in *fromsin; 28077baebbfSderaadt long ans = 0, port; 281df930be7Sderaadt caddr_t t; 282df930be7Sderaadt 28377baebbfSderaadt fromsin = svc_getcaller(xprt); 28477baebbfSderaadt 285df930be7Sderaadt if (debugging) 286df930be7Sderaadt (void) fprintf(stderr, "server: about to do a switch\n"); 287df930be7Sderaadt switch (rqstp->rq_proc) { 288df930be7Sderaadt 289df930be7Sderaadt case PMAPPROC_NULL: 290df930be7Sderaadt /* 291df930be7Sderaadt * Null proc call 292df930be7Sderaadt */ 293df930be7Sderaadt if (!svc_sendreply(xprt, xdr_void, (caddr_t)0) && debugging) { 294df930be7Sderaadt abort(); 295df930be7Sderaadt } 296df930be7Sderaadt break; 297df930be7Sderaadt 298df930be7Sderaadt case PMAPPROC_SET: 299df930be7Sderaadt /* 300df930be7Sderaadt * Set a program,version to port mapping 301df930be7Sderaadt */ 30277baebbfSderaadt if (xprt != ltcpxprt && xprt != ludpxprt) { 30377baebbfSderaadt syslog(LOG_WARNING, 30477baebbfSderaadt "non-local set attempt (might be from %s)", 3059430a6aeSderaadt inet_ntoa(fromsin->sin_addr)); 30677baebbfSderaadt svcerr_noproc(xprt); 30777baebbfSderaadt return; 30877baebbfSderaadt } 30960cef36bSderaadt if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) { 310df930be7Sderaadt svcerr_decode(xprt); 31160cef36bSderaadt break; 31260cef36bSderaadt } 313df930be7Sderaadt /* 314df930be7Sderaadt * check to see if already used 315df930be7Sderaadt * find_service returns a hit even if 316df930be7Sderaadt * the versions don't match, so check for it 317df930be7Sderaadt */ 318df930be7Sderaadt fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot); 319df930be7Sderaadt if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) { 32077baebbfSderaadt if (fnd->pml_map.pm_port == reg.pm_port) 321df930be7Sderaadt ans = 1; 322df930be7Sderaadt goto done; 323df930be7Sderaadt } 32477baebbfSderaadt 32577baebbfSderaadt /* check if secure */ 3262afbd927Sderaadt if (fnd && (fnd->pml_map.pm_port < IPPORT_RESERVED || 3272afbd927Sderaadt fnd->pml_map.pm_port == NFS_PORT) && 32877baebbfSderaadt htons(fromsin->sin_port) >= IPPORT_RESERVED) { 32960cef36bSderaadt syslog(LOG_WARNING, "resvport set attempt by non-root"); 330df930be7Sderaadt goto done; 331df930be7Sderaadt } 33277baebbfSderaadt 333df930be7Sderaadt /* 334df930be7Sderaadt * add to END of list 335df930be7Sderaadt */ 33660cef36bSderaadt pml = (struct pmaplist *)malloc(sizeof(struct pmaplist)); 337df930be7Sderaadt pml->pml_map = reg; 338df930be7Sderaadt pml->pml_next = 0; 339df930be7Sderaadt if (pmaplist == 0) { 340df930be7Sderaadt pmaplist = pml; 341df930be7Sderaadt } else { 342df930be7Sderaadt for (fnd = pmaplist; fnd->pml_next != 0; 343df930be7Sderaadt fnd = fnd->pml_next); 344df930be7Sderaadt fnd->pml_next = pml; 345df930be7Sderaadt } 346df930be7Sderaadt ans = 1; 347df930be7Sderaadt done: 348df930be7Sderaadt if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) && 349df930be7Sderaadt debugging) { 350df930be7Sderaadt (void) fprintf(stderr, "svc_sendreply\n"); 351df930be7Sderaadt abort(); 352df930be7Sderaadt } 353df930be7Sderaadt break; 354df930be7Sderaadt 355df930be7Sderaadt case PMAPPROC_UNSET: 356df930be7Sderaadt /* 357df930be7Sderaadt * Remove a program,version to port mapping. 358df930be7Sderaadt */ 35977baebbfSderaadt if (xprt != ltcpxprt && xprt != ludpxprt) { 36077baebbfSderaadt syslog(LOG_WARNING, 36177baebbfSderaadt "non-local unset attempt (might be from %s)", 3629430a6aeSderaadt inet_ntoa(fromsin->sin_addr)); 36377baebbfSderaadt svcerr_noproc(xprt); 36477baebbfSderaadt return; 36577baebbfSderaadt } 36677baebbfSderaadt if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) { 367df930be7Sderaadt svcerr_decode(xprt); 36877baebbfSderaadt break; 36977baebbfSderaadt } 370df930be7Sderaadt for (prevpml = NULL, pml = pmaplist; pml != NULL; ) { 371df930be7Sderaadt if ((pml->pml_map.pm_prog != reg.pm_prog) || 372df930be7Sderaadt (pml->pml_map.pm_vers != reg.pm_vers)) { 373df930be7Sderaadt /* both pml & prevpml move forwards */ 374df930be7Sderaadt prevpml = pml; 375df930be7Sderaadt pml = pml->pml_next; 376df930be7Sderaadt continue; 377df930be7Sderaadt } 37877baebbfSderaadt if ((pml->pml_map.pm_port < IPPORT_RESERVED || 37977baebbfSderaadt pml->pml_map.pm_port == NFS_PORT) && 38077baebbfSderaadt htons(fromsin->sin_port) >= IPPORT_RESERVED) { 38177baebbfSderaadt syslog(LOG_WARNING, 38277baebbfSderaadt "resvport unset attempt by non-root"); 38377baebbfSderaadt break; 38477baebbfSderaadt } 38577baebbfSderaadt 386df930be7Sderaadt /* found it; pml moves forward, prevpml stays */ 387df930be7Sderaadt ans = 1; 388df930be7Sderaadt t = (caddr_t)pml; 389df930be7Sderaadt pml = pml->pml_next; 390df930be7Sderaadt if (prevpml == NULL) 391df930be7Sderaadt pmaplist = pml; 392df930be7Sderaadt else 393df930be7Sderaadt prevpml->pml_next = pml; 394df930be7Sderaadt free(t); 395df930be7Sderaadt } 396df930be7Sderaadt if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) && 397df930be7Sderaadt debugging) { 39860cef36bSderaadt fprintf(stderr, "svc_sendreply\n"); 399df930be7Sderaadt abort(); 400df930be7Sderaadt } 401df930be7Sderaadt break; 402df930be7Sderaadt 403df930be7Sderaadt case PMAPPROC_GETPORT: 404df930be7Sderaadt /* 405df930be7Sderaadt * Lookup the mapping for a program,version and return its port 406df930be7Sderaadt */ 40760cef36bSderaadt if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) { 408df930be7Sderaadt svcerr_decode(xprt); 40960cef36bSderaadt break; 41060cef36bSderaadt } 411df930be7Sderaadt fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot); 412df930be7Sderaadt if (fnd) 413df930be7Sderaadt port = fnd->pml_map.pm_port; 414df930be7Sderaadt else 415df930be7Sderaadt port = 0; 416df930be7Sderaadt if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) && 417df930be7Sderaadt debugging) { 41860cef36bSderaadt fprintf(stderr, "svc_sendreply\n"); 419df930be7Sderaadt abort(); 420df930be7Sderaadt } 421df930be7Sderaadt break; 422df930be7Sderaadt 423df930be7Sderaadt case PMAPPROC_DUMP: 424df930be7Sderaadt /* 425df930be7Sderaadt * Return the current set of mapped program,version 426df930be7Sderaadt */ 42760cef36bSderaadt if (!svc_getargs(xprt, xdr_void, NULL)) { 428df930be7Sderaadt svcerr_decode(xprt); 42960cef36bSderaadt break; 43060cef36bSderaadt } 43160cef36bSderaadt if (!svc_sendreply(xprt, xdr_pmaplist, (caddr_t)&pmaplist) && 43260cef36bSderaadt debugging) { 43360cef36bSderaadt fprintf(stderr, "svc_sendreply\n"); 434df930be7Sderaadt abort(); 435df930be7Sderaadt } 436df930be7Sderaadt break; 437df930be7Sderaadt 438df930be7Sderaadt case PMAPPROC_CALLIT: 439df930be7Sderaadt /* 440df930be7Sderaadt * Calls a procedure on the local machine. If the requested 441df930be7Sderaadt * procedure is not registered this procedure does not return 442df930be7Sderaadt * error information!! 443df930be7Sderaadt * This procedure is only supported on rpc/udp and calls via 444df930be7Sderaadt * rpc/udp. It passes null authentication parameters. 445df930be7Sderaadt */ 446df930be7Sderaadt callit(rqstp, xprt); 447df930be7Sderaadt break; 448df930be7Sderaadt 449df930be7Sderaadt default: 450df930be7Sderaadt svcerr_noproc(xprt); 451df930be7Sderaadt break; 452df930be7Sderaadt } 453df930be7Sderaadt } 454df930be7Sderaadt 455df930be7Sderaadt 456df930be7Sderaadt /* 457df930be7Sderaadt * Stuff for the rmtcall service 458df930be7Sderaadt */ 459df930be7Sderaadt #define ARGSIZE 9000 460df930be7Sderaadt 461df930be7Sderaadt struct encap_parms { 462df930be7Sderaadt u_int arglen; 463df930be7Sderaadt char *args; 464df930be7Sderaadt }; 465df930be7Sderaadt 466df930be7Sderaadt static bool_t 467df930be7Sderaadt xdr_encap_parms(xdrs, epp) 468df930be7Sderaadt XDR *xdrs; 469df930be7Sderaadt struct encap_parms *epp; 470df930be7Sderaadt { 471df930be7Sderaadt 472df930be7Sderaadt return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE)); 473df930be7Sderaadt } 474df930be7Sderaadt 475df930be7Sderaadt struct rmtcallargs { 476df930be7Sderaadt u_long rmt_prog; 477df930be7Sderaadt u_long rmt_vers; 478df930be7Sderaadt u_long rmt_port; 479df930be7Sderaadt u_long rmt_proc; 480df930be7Sderaadt struct encap_parms rmt_args; 481df930be7Sderaadt }; 482df930be7Sderaadt 483df930be7Sderaadt static bool_t 484df930be7Sderaadt xdr_rmtcall_args(xdrs, cap) 485df930be7Sderaadt register XDR *xdrs; 486df930be7Sderaadt register struct rmtcallargs *cap; 487df930be7Sderaadt { 488df930be7Sderaadt 489df930be7Sderaadt /* does not get a port number */ 490df930be7Sderaadt if (xdr_u_long(xdrs, &(cap->rmt_prog)) && 491df930be7Sderaadt xdr_u_long(xdrs, &(cap->rmt_vers)) && 492df930be7Sderaadt xdr_u_long(xdrs, &(cap->rmt_proc))) { 493df930be7Sderaadt return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 494df930be7Sderaadt } 495df930be7Sderaadt return (FALSE); 496df930be7Sderaadt } 497df930be7Sderaadt 498df930be7Sderaadt static bool_t 499df930be7Sderaadt xdr_rmtcall_result(xdrs, cap) 500df930be7Sderaadt register XDR *xdrs; 501df930be7Sderaadt register struct rmtcallargs *cap; 502df930be7Sderaadt { 503df930be7Sderaadt if (xdr_u_long(xdrs, &(cap->rmt_port))) 504df930be7Sderaadt return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 505df930be7Sderaadt return (FALSE); 506df930be7Sderaadt } 507df930be7Sderaadt 508df930be7Sderaadt /* 509df930be7Sderaadt * only worries about the struct encap_parms part of struct rmtcallargs. 510df930be7Sderaadt * The arglen must already be set!! 511df930be7Sderaadt */ 512df930be7Sderaadt static bool_t 513df930be7Sderaadt xdr_opaque_parms(xdrs, cap) 514df930be7Sderaadt XDR *xdrs; 515df930be7Sderaadt struct rmtcallargs *cap; 516df930be7Sderaadt { 517df930be7Sderaadt 518df930be7Sderaadt return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen)); 519df930be7Sderaadt } 520df930be7Sderaadt 521df930be7Sderaadt /* 522df930be7Sderaadt * This routine finds and sets the length of incoming opaque paraters 523df930be7Sderaadt * and then calls xdr_opaque_parms. 524df930be7Sderaadt */ 525df930be7Sderaadt static bool_t 526df930be7Sderaadt xdr_len_opaque_parms(xdrs, cap) 527df930be7Sderaadt register XDR *xdrs; 528df930be7Sderaadt struct rmtcallargs *cap; 529df930be7Sderaadt { 530df930be7Sderaadt register u_int beginpos, lowpos, highpos, currpos, pos; 531df930be7Sderaadt 532df930be7Sderaadt beginpos = lowpos = pos = xdr_getpos(xdrs); 533df930be7Sderaadt highpos = lowpos + ARGSIZE; 534df930be7Sderaadt while ((int)(highpos - lowpos) >= 0) { 535df930be7Sderaadt currpos = (lowpos + highpos) / 2; 536df930be7Sderaadt if (xdr_setpos(xdrs, currpos)) { 537df930be7Sderaadt pos = currpos; 538df930be7Sderaadt lowpos = currpos + 1; 539df930be7Sderaadt } else { 540df930be7Sderaadt highpos = currpos - 1; 541df930be7Sderaadt } 542df930be7Sderaadt } 543df930be7Sderaadt xdr_setpos(xdrs, beginpos); 544df930be7Sderaadt cap->rmt_args.arglen = pos - beginpos; 545df930be7Sderaadt return (xdr_opaque_parms(xdrs, cap)); 546df930be7Sderaadt } 547df930be7Sderaadt 548df930be7Sderaadt /* 549df930be7Sderaadt * Call a remote procedure service 550df930be7Sderaadt * This procedure is very quiet when things go wrong. 551df930be7Sderaadt * The proc is written to support broadcast rpc. In the broadcast case, 552df930be7Sderaadt * a machine should shut-up instead of complain, less the requestor be 553df930be7Sderaadt * overrun with complaints at the expense of not hearing a valid reply ... 554df930be7Sderaadt * 555df930be7Sderaadt * This now forks so that the program & process that it calls can call 556df930be7Sderaadt * back to the portmapper. 557df930be7Sderaadt */ 558df930be7Sderaadt static void 559df930be7Sderaadt callit(rqstp, xprt) 560df930be7Sderaadt struct svc_req *rqstp; 561df930be7Sderaadt SVCXPRT *xprt; 562df930be7Sderaadt { 563df930be7Sderaadt struct rmtcallargs a; 564df930be7Sderaadt struct pmaplist *pml; 565df930be7Sderaadt u_short port; 566df930be7Sderaadt struct sockaddr_in me; 567df930be7Sderaadt int pid, so = -1, dontblock = 1; 568df930be7Sderaadt CLIENT *client; 569df930be7Sderaadt struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred; 570df930be7Sderaadt struct timeval timeout; 571df930be7Sderaadt char buf[ARGSIZE]; 572df930be7Sderaadt 573df930be7Sderaadt timeout.tv_sec = 5; 574df930be7Sderaadt timeout.tv_usec = 0; 575df930be7Sderaadt a.rmt_args.args = buf; 576df930be7Sderaadt if (!svc_getargs(xprt, xdr_rmtcall_args, (caddr_t)&a)) 577df930be7Sderaadt return; 578*f94670b8Sderaadt if (!check_callit(svc_getcaller(xprt), rqstp->rq_proc, 579*f94670b8Sderaadt a.rmt_prog, a.rmt_proc)) 580*f94670b8Sderaadt return; 581df930be7Sderaadt if ((pml = find_service(a.rmt_prog, a.rmt_vers, 582df930be7Sderaadt (u_long)IPPROTO_UDP)) == NULL) 583df930be7Sderaadt return; 58477baebbfSderaadt 585df930be7Sderaadt /* 586df930be7Sderaadt * fork a child to do the work. Parent immediately returns. 587df930be7Sderaadt * Child exits upon completion. 588df930be7Sderaadt */ 589df930be7Sderaadt if ((pid = fork()) != 0) { 590df930be7Sderaadt if (pid == -1) 591df930be7Sderaadt syslog(LOG_ERR, "CALLIT (prog %lu): fork: %m", 592df930be7Sderaadt a.rmt_prog); 593df930be7Sderaadt return; 594df930be7Sderaadt } 595df930be7Sderaadt port = pml->pml_map.pm_port; 596df930be7Sderaadt get_myaddress(&me); 597df930be7Sderaadt me.sin_port = htons(port); 598df930be7Sderaadt 599df930be7Sderaadt /* Avoid implicit binding to reserved port by clntudp_create() */ 600df930be7Sderaadt so = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); 601df930be7Sderaadt if (so == -1) 602df930be7Sderaadt exit(1); 603df930be7Sderaadt if (ioctl(so, FIONBIO, &dontblock) == -1) 604df930be7Sderaadt exit(1); 605df930be7Sderaadt 606df930be7Sderaadt client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &so); 607df930be7Sderaadt if (client != (CLIENT *)NULL) { 60877baebbfSderaadt if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) 609df930be7Sderaadt client->cl_auth = authunix_create(au->aup_machname, 610df930be7Sderaadt au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids); 611df930be7Sderaadt a.rmt_port = (u_long)port; 612df930be7Sderaadt if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a, 61377baebbfSderaadt xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) 614df930be7Sderaadt svc_sendreply(xprt, xdr_rmtcall_result, (caddr_t)&a); 615df930be7Sderaadt AUTH_DESTROY(client->cl_auth); 616df930be7Sderaadt clnt_destroy(client); 617df930be7Sderaadt } 618df930be7Sderaadt (void)close(so); 619df930be7Sderaadt exit(0); 620df930be7Sderaadt } 621df930be7Sderaadt 622df930be7Sderaadt void 623df930be7Sderaadt reap() 624df930be7Sderaadt { 625df930be7Sderaadt int save_errno = errno; 626df930be7Sderaadt 627df930be7Sderaadt while (wait3(NULL, WNOHANG, NULL) != -1) 628df930be7Sderaadt ; 629df930be7Sderaadt errno = save_errno; 630df930be7Sderaadt } 631*f94670b8Sderaadt 632*f94670b8Sderaadt #define NFSPROG ((u_long) 100003) 633*f94670b8Sderaadt #define MOUNTPROG ((u_long) 100005) 634*f94670b8Sderaadt #define YPXPROG ((u_long) 100069) 635*f94670b8Sderaadt #define YPPROG ((u_long) 100004) 636*f94670b8Sderaadt #define YPPROC_DOMAIN_NONACK ((u_long) 2) 637*f94670b8Sderaadt #define MOUNTPROC_MNT ((u_long) 1) 638*f94670b8Sderaadt 639*f94670b8Sderaadt int 640*f94670b8Sderaadt check_callit(addr, proc, prog, aproc) 641*f94670b8Sderaadt struct sockaddr_in *addr; 642*f94670b8Sderaadt u_long proc; 643*f94670b8Sderaadt u_long prog; 644*f94670b8Sderaadt u_long aproc; 645*f94670b8Sderaadt { 646*f94670b8Sderaadt if (prog == PMAPPROG || 647*f94670b8Sderaadt prog == NFSPROG || 648*f94670b8Sderaadt prog == YPXPROG || 649*f94670b8Sderaadt (prog == MOUNTPROG && aproc == MOUNTPROC_MNT) || 650*f94670b8Sderaadt (prog == YPPROG && aproc != YPPROC_DOMAIN_NONACK)) { 651*f94670b8Sderaadt syslog(LOG_WARNING, 652*f94670b8Sderaadt "callit prog %d aproc %d (might be from %s)", 653*f94670b8Sderaadt prog, aproc, inet_ntoa(*addr)); 654*f94670b8Sderaadt return (FALSE); 655*f94670b8Sderaadt } 656*f94670b8Sderaadt return (TRUE); 657*f94670b8Sderaadt } 658