1 /* $NetBSD: pmap_svc.c,v 1.2 2000/10/20 11:49:40 fvdl Exp $ */ 2 /* $FreeBSD$ */ 3 4 /*- 5 * Copyright (c) 2009, Sun Microsystems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * - Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * - Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * - Neither the name of Sun Microsystems, Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc. 33 */ 34 35 /* #ident "@(#)pmap_svc.c 1.14 93/07/05 SMI" */ 36 37 #if 0 38 #ifndef lint 39 static char sccsid[] = "@(#)pmap_svc.c 1.23 89/04/05 Copyr 1984 Sun Micro"; 40 #endif 41 #endif 42 43 /* 44 * pmap_svc.c 45 * The server procedure for the version 2 portmaper. 46 * All the portmapper related interface from the portmap side. 47 */ 48 49 #ifdef PORTMAP 50 #include <sys/types.h> 51 #include <sys/socket.h> 52 #include <stdio.h> 53 #include <rpc/rpc.h> 54 #include <rpc/pmap_prot.h> 55 #include <rpc/rpcb_prot.h> 56 #ifdef RPCBIND_DEBUG 57 #include <stdlib.h> 58 #endif 59 #include "rpcbind.h" 60 61 static struct pmaplist *find_service_pmap(rpcprog_t, rpcvers_t, 62 rpcprot_t); 63 static bool_t pmapproc_change(struct svc_req *, SVCXPRT *, u_long); 64 static bool_t pmapproc_getport(struct svc_req *, SVCXPRT *); 65 static bool_t pmapproc_dump(struct svc_req *, SVCXPRT *); 66 67 /* 68 * Called for all the version 2 inquiries. 69 */ 70 void 71 pmap_service(struct svc_req *rqstp, SVCXPRT *xprt) 72 { 73 rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc); 74 switch (rqstp->rq_proc) { 75 case PMAPPROC_NULL: 76 /* 77 * Null proc call 78 */ 79 #ifdef RPCBIND_DEBUG 80 if (debugging) 81 fprintf(stderr, "PMAPPROC_NULL\n"); 82 #endif 83 check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS); 84 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_void, NULL)) && 85 debugging) { 86 if (doabort) { 87 rpcbind_abort(); 88 } 89 } 90 break; 91 92 case PMAPPROC_SET: 93 /* 94 * Set a program, version to port mapping 95 */ 96 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 97 break; 98 99 case PMAPPROC_UNSET: 100 /* 101 * Remove a program, version to port mapping. 102 */ 103 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 104 break; 105 106 case PMAPPROC_GETPORT: 107 /* 108 * Lookup the mapping for a program, version and return its 109 * port number. 110 */ 111 pmapproc_getport(rqstp, xprt); 112 break; 113 114 case PMAPPROC_DUMP: 115 /* 116 * Return the current set of mapped program, version 117 */ 118 #ifdef RPCBIND_DEBUG 119 if (debugging) 120 fprintf(stderr, "PMAPPROC_DUMP\n"); 121 #endif 122 pmapproc_dump(rqstp, xprt); 123 break; 124 125 case PMAPPROC_CALLIT: 126 /* 127 * Calls a procedure on the local machine. If the requested 128 * procedure is not registered this procedure does not return 129 * error information!! 130 * This procedure is only supported on rpc/udp and calls via 131 * rpc/udp. It passes null authentication parameters. 132 */ 133 rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS); 134 break; 135 136 default: 137 svcerr_noproc(xprt); 138 break; 139 } 140 } 141 142 /* 143 * returns the item with the given program, version number. If that version 144 * number is not found, it returns the item with that program number, so that 145 * the port number is now returned to the caller. The caller when makes a 146 * call to this program, version number, the call will fail and it will 147 * return with PROGVERS_MISMATCH. The user can then determine the highest 148 * and the lowest version number for this program using clnt_geterr() and 149 * use those program version numbers. 150 */ 151 static struct pmaplist * 152 find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot) 153 { 154 register struct pmaplist *hit = NULL; 155 register struct pmaplist *pml; 156 157 for (pml = list_pml; pml != NULL; pml = pml->pml_next) { 158 if ((pml->pml_map.pm_prog != prog) || 159 (pml->pml_map.pm_prot != prot)) 160 continue; 161 hit = pml; 162 if (pml->pml_map.pm_vers == vers) 163 break; 164 } 165 return (hit); 166 } 167 168 static bool_t 169 pmapproc_change(struct svc_req *rqstp __unused, SVCXPRT *xprt, unsigned long op) 170 { 171 struct pmap reg; 172 RPCB rpcbreg; 173 long ans; 174 struct sockaddr_in *who; 175 uid_t uid; 176 char uidbuf[32]; 177 178 #ifdef RPCBIND_DEBUG 179 if (debugging) 180 fprintf(stderr, "%s request for (%lu, %lu) : ", 181 op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET", 182 reg.pm_prog, reg.pm_vers); 183 #endif 184 185 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 186 svcerr_decode(xprt); 187 return (FALSE); 188 } 189 190 if (!check_access(xprt, op, ®, PMAPVERS)) { 191 svcerr_weakauth(xprt); 192 return FALSE; 193 } 194 195 who = svc_getcaller(xprt); 196 197 /* 198 * Can't use getpwnam here. We might end up calling ourselves 199 * and looping. 200 */ 201 if (__rpc_get_local_uid(xprt, &uid) < 0) 202 rpcbreg.r_owner = "unknown"; 203 else if (uid == 0) 204 rpcbreg.r_owner = "superuser"; 205 else { 206 /* r_owner will be strdup-ed later */ 207 snprintf(uidbuf, sizeof uidbuf, "%d", uid); 208 rpcbreg.r_owner = uidbuf; 209 } 210 211 rpcbreg.r_prog = reg.pm_prog; 212 rpcbreg.r_vers = reg.pm_vers; 213 214 if (op == PMAPPROC_SET) { 215 char buf[32]; 216 217 snprintf(buf, sizeof buf, "0.0.0.0.%d.%d", 218 (int)((reg.pm_port >> 8) & 0xff), 219 (int)(reg.pm_port & 0xff)); 220 rpcbreg.r_addr = buf; 221 if (reg.pm_prot == IPPROTO_UDP) { 222 rpcbreg.r_netid = udptrans; 223 } else if (reg.pm_prot == IPPROTO_TCP) { 224 rpcbreg.r_netid = tcptrans; 225 } else { 226 ans = FALSE; 227 goto done_change; 228 } 229 ans = map_set(&rpcbreg, rpcbreg.r_owner); 230 } else if (op == PMAPPROC_UNSET) { 231 bool_t ans1, ans2; 232 233 rpcbreg.r_addr = NULL; 234 rpcbreg.r_netid = tcptrans; 235 ans1 = map_unset(&rpcbreg, rpcbreg.r_owner); 236 rpcbreg.r_netid = udptrans; 237 ans2 = map_unset(&rpcbreg, rpcbreg.r_owner); 238 ans = ans1 || ans2; 239 } else { 240 ans = FALSE; 241 } 242 done_change: 243 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t) &ans)) && 244 debugging) { 245 fprintf(stderr, "portmap: svc_sendreply\n"); 246 if (doabort) { 247 rpcbind_abort(); 248 } 249 } 250 #ifdef RPCBIND_DEBUG 251 if (debugging) 252 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 253 #endif 254 if (op == PMAPPROC_SET) 255 rpcbs_set(RPCBVERS_2_STAT, ans); 256 else 257 rpcbs_unset(RPCBVERS_2_STAT, ans); 258 return (TRUE); 259 } 260 261 /* ARGSUSED */ 262 static bool_t 263 pmapproc_getport(struct svc_req *rqstp __unused, SVCXPRT *xprt) 264 { 265 struct pmap reg; 266 long lport; 267 int port = 0; 268 struct pmaplist *fnd; 269 #ifdef RPCBIND_DEBUG 270 char *uaddr; 271 #endif 272 273 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 274 svcerr_decode(xprt); 275 return (FALSE); 276 } 277 278 if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) { 279 svcerr_weakauth(xprt); 280 return FALSE; 281 } 282 283 #ifdef RPCBIND_DEBUG 284 if (debugging) { 285 uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid), 286 svc_getrpccaller(xprt)); 287 fprintf(stderr, "PMAP_GETPORT req for (%lu, %lu, %s) from %s :", 288 reg.pm_prog, reg.pm_vers, 289 reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr); 290 free(uaddr); 291 } 292 #endif 293 fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot); 294 if (fnd) { 295 char serveuaddr[32], *ua; 296 int h1, h2, h3, h4, p1, p2; 297 char *netid; 298 299 if (reg.pm_prot == IPPROTO_UDP) { 300 ua = udp_uaddr; 301 netid = udptrans; 302 } else { 303 ua = tcp_uaddr; /* To get the len */ 304 netid = tcptrans; 305 } 306 if (ua == NULL) { 307 goto sendreply; 308 } 309 if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3, 310 &h4, &p1, &p2) == 6) { 311 p1 = (fnd->pml_map.pm_port >> 8) & 0xff; 312 p2 = (fnd->pml_map.pm_port) & 0xff; 313 snprintf(serveuaddr, sizeof serveuaddr, 314 "%d.%d.%d.%d.%d.%d", h1, h2, h3, h4, p1, p2); 315 if (is_bound(netid, serveuaddr)) { 316 port = fnd->pml_map.pm_port; 317 } else { /* this service is dead; delete it */ 318 delete_prog(reg.pm_prog); 319 } 320 } 321 } 322 sendreply: 323 lport = port; 324 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) && 325 debugging) { 326 (void) fprintf(stderr, "portmap: svc_sendreply\n"); 327 if (doabort) { 328 rpcbind_abort(); 329 } 330 } 331 #ifdef RPCBIND_DEBUG 332 if (debugging) 333 fprintf(stderr, "port = %d\n", port); 334 #endif 335 rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers, 336 reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans, 337 port ? udptrans : ""); 338 339 return (TRUE); 340 } 341 342 /* ARGSUSED */ 343 static bool_t 344 pmapproc_dump(struct svc_req *rqstp __unused, SVCXPRT *xprt) 345 { 346 if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) { 347 svcerr_decode(xprt); 348 return (FALSE); 349 } 350 351 if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) { 352 svcerr_weakauth(xprt); 353 return FALSE; 354 } 355 356 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr, 357 (caddr_t)&list_pml)) && debugging) { 358 if (debugging) 359 (void) fprintf(stderr, "portmap: svc_sendreply\n"); 360 if (doabort) { 361 rpcbind_abort(); 362 } 363 } 364 return (TRUE); 365 } 366 367 #endif /* PORTMAP */ 368