1 /* $NetBSD: pmap_svc.c,v 1.2 2013/10/19 17:45:00 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 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 portmapper. 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, rpcprot_t); 62 static bool_t pmapproc_change(struct svc_req *, SVCXPRT *, u_long); 63 static bool_t pmapproc_getport(struct svc_req *, SVCXPRT *); 64 static bool_t pmapproc_dump(struct svc_req *, SVCXPRT *); 65 66 /* 67 * Called for all the version 2 inquiries. 68 */ 69 void 70 pmap_service(struct svc_req *rqstp, SVCXPRT *xprt) 71 { 72 rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc); 73 switch (rqstp->rq_proc) { 74 case PMAPPROC_NULL: 75 /* 76 * Null proc call 77 */ 78 #ifdef RPCBIND_DEBUG 79 if (debugging) 80 fprintf(stderr, "PMAPPROC_NULL\n"); 81 #endif 82 check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS); 83 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_void, NULL)) && 84 debugging) { 85 if (doabort) { 86 rpcbind_abort(); 87 } 88 } 89 break; 90 91 case PMAPPROC_SET: 92 /* 93 * Set a program, version to port mapping 94 */ 95 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 96 break; 97 98 case PMAPPROC_UNSET: 99 /* 100 * Remove a program, version to port mapping. 101 */ 102 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 103 break; 104 105 case PMAPPROC_GETPORT: 106 /* 107 * Lookup the mapping for a program, version and return its 108 * port number. 109 */ 110 pmapproc_getport(rqstp, xprt); 111 break; 112 113 case PMAPPROC_DUMP: 114 /* 115 * Return the current set of mapped program, version 116 */ 117 #ifdef RPCBIND_DEBUG 118 if (debugging) 119 fprintf(stderr, "PMAPPROC_DUMP\n"); 120 #endif 121 pmapproc_dump(rqstp, xprt); 122 break; 123 124 case PMAPPROC_CALLIT: 125 /* 126 * Calls a procedure on the local machine. If the requested 127 * procedure is not registered this procedure does not return 128 * error information!! 129 * This procedure is only supported on rpc/udp and calls via 130 * rpc/udp. It passes null authentication parameters. 131 */ 132 rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS); 133 break; 134 135 default: 136 svcerr_noproc(xprt); 137 break; 138 } 139 } 140 141 /* 142 * returns the item with the given program, version number. If that version 143 * number is not found, it returns the item with that program number, so that 144 * the port number is now returned to the caller. The caller when makes a 145 * call to this program, version number, the call will fail and it will 146 * return with PROGVERS_MISMATCH. The user can then determine the highest 147 * and the lowest version number for this program using clnt_geterr() and 148 * use those program version numbers. 149 */ 150 static struct pmaplist * 151 find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot) 152 { 153 register struct pmaplist *hit = NULL; 154 register struct pmaplist *pml; 155 156 for (pml = list_pml; pml != NULL; pml = pml->pml_next) { 157 if ((pml->pml_map.pm_prog != prog) || 158 (pml->pml_map.pm_prot != prot)) 159 continue; 160 hit = pml; 161 if (pml->pml_map.pm_vers == vers) 162 break; 163 } 164 return (hit); 165 } 166 167 static bool_t 168 pmapproc_change(struct svc_req *rqstp, SVCXPRT *xprt, unsigned long op) 169 { 170 struct pmap reg; 171 RPCB rpcbreg; 172 long ans; 173 struct sockcred *sc; 174 char uidbuf[32]; 175 176 #ifdef RPCBIND_DEBUG 177 if (debugging) 178 fprintf(stderr, "%s request for (%lu, %lu) : ", 179 op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET", 180 reg.pm_prog, reg.pm_vers); 181 #endif 182 183 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 184 svcerr_decode(xprt); 185 return (FALSE); 186 } 187 188 if (!check_access(xprt, op, ®, PMAPVERS)) { 189 svcerr_weakauth(xprt); 190 return FALSE; 191 } 192 193 (void)svc_getcaller(xprt); 194 sc = __svc_getcallercreds(xprt); 195 196 /* 197 * Can't use getpwnam here. We might end up calling ourselves 198 * and looping. 199 */ 200 if (sc == NULL) 201 rpcbreg.r_owner = __UNCONST(rpcbind_unknown); 202 else if (sc->sc_uid == 0) 203 rpcbreg.r_owner = __UNCONST(rpcbind_superuser); 204 else { 205 /* r_owner will be strdup-ed later */ 206 snprintf(uidbuf, sizeof uidbuf, "%d", sc->sc_uid); 207 rpcbreg.r_owner = uidbuf; 208 } 209 210 rpcbreg.r_prog = reg.pm_prog; 211 rpcbreg.r_vers = reg.pm_vers; 212 213 if (op == PMAPPROC_SET) { 214 char buf[32]; 215 216 snprintf(buf, sizeof(buf), "0.0.0.0.%d.%d", 217 (int)((reg.pm_port >> 8) & 0xff), 218 (int)(reg.pm_port & 0xff)); 219 rpcbreg.r_addr = buf; 220 if (reg.pm_prot == IPPROTO_UDP) { 221 rpcbreg.r_netid = __UNCONST(udptrans); 222 } else if (reg.pm_prot == IPPROTO_TCP) { 223 rpcbreg.r_netid = __UNCONST(tcptrans); 224 } else { 225 ans = FALSE; 226 goto done_change; 227 } 228 ans = map_set(&rpcbreg, rpcbreg.r_owner); 229 } else if (op == PMAPPROC_UNSET) { 230 bool_t ans1, ans2; 231 232 rpcbreg.r_addr = NULL; 233 rpcbreg.r_netid = __UNCONST(tcptrans); 234 ans1 = map_unset(&rpcbreg, rpcbreg.r_owner); 235 rpcbreg.r_netid = __UNCONST(udptrans); 236 ans2 = map_unset(&rpcbreg, rpcbreg.r_owner); 237 ans = ans1 || ans2; 238 } else { 239 ans = FALSE; 240 } 241 done_change: 242 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t) &ans)) && 243 debugging) { 244 fprintf(stderr, "portmap: svc_sendreply\n"); 245 if (doabort) { 246 rpcbind_abort(); 247 } 248 } 249 #ifdef RPCBIND_DEBUG 250 if (debugging) 251 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 252 #endif 253 if (op == PMAPPROC_SET) 254 rpcbs_set(RPCBVERS_2_STAT, ans); 255 else 256 rpcbs_unset(RPCBVERS_2_STAT, ans); 257 return (TRUE); 258 } 259 260 /* ARGSUSED */ 261 static bool_t 262 pmapproc_getport(struct svc_req *rqstp, SVCXPRT *xprt) 263 { 264 struct pmap reg; 265 long lport; 266 int port = 0; 267 struct pmaplist *fnd; 268 #ifdef RPCBIND_DEBUG 269 char *uaddr; 270 #endif 271 272 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 273 svcerr_decode(xprt); 274 return (FALSE); 275 } 276 277 if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) { 278 svcerr_weakauth(xprt); 279 return FALSE; 280 } 281 282 #ifdef RPCBIND_DEBUG 283 if (debugging) { 284 uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid), 285 svc_getrpccaller(xprt)); 286 fprintf(stderr, "PMAP_GETPORT req for (%lu, %lu, %s) from %s :", 287 reg.pm_prog, reg.pm_vers, 288 reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr); 289 free(uaddr); 290 } 291 #endif 292 fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot); 293 if (fnd) { 294 char serveuaddr[32]; 295 int h1, h2, h3, h4, p1, p2; 296 const char *netid, *ua; 297 298 if (reg.pm_prot == IPPROTO_UDP) { 299 ua = udp_uaddr; 300 netid = udptrans; 301 } else { 302 ua = tcp_uaddr; /* To get the len */ 303 netid = tcptrans; 304 } 305 if (ua == NULL) { 306 goto sendreply; 307 } 308 if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3, 309 &h4, &p1, &p2) == 6) { 310 p1 = (fnd->pml_map.pm_port >> 8) & 0xff; 311 p2 = (fnd->pml_map.pm_port) & 0xff; 312 snprintf(serveuaddr, sizeof(serveuaddr), 313 "%d.%d.%d.%d.%d.%d", h1, h2, h3, h4, p1, p2); 314 if (is_bound(netid, serveuaddr)) { 315 port = fnd->pml_map.pm_port; 316 } else { /* this service is dead; delete it */ 317 delete_prog(reg.pm_prog); 318 } 319 } 320 } 321 sendreply: 322 lport = port; 323 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) && 324 debugging) { 325 (void) fprintf(stderr, "portmap: svc_sendreply\n"); 326 if (doabort) { 327 rpcbind_abort(); 328 } 329 } 330 #ifdef RPCBIND_DEBUG 331 if (debugging) 332 fprintf(stderr, "port = %d\n", port); 333 #endif 334 rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers, 335 reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans, 336 port ? udptrans : ""); 337 338 return (TRUE); 339 } 340 341 /* ARGSUSED */ 342 static bool_t 343 pmapproc_dump(struct svc_req *rqstp, SVCXPRT *xprt) 344 { 345 if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) { 346 svcerr_decode(xprt); 347 return (FALSE); 348 } 349 350 if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) { 351 svcerr_weakauth(xprt); 352 return FALSE; 353 } 354 355 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr, 356 (caddr_t)&list_pml)) && debugging) { 357 if (debugging) 358 (void) fprintf(stderr, "portmap: svc_sendreply\n"); 359 if (doabort) { 360 rpcbind_abort(); 361 } 362 } 363 return (TRUE); 364 } 365 366 #endif /* PORTMAP */ 367