1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)pmap_svc.c 1.14 93/07/05 SMI; 1.23 89/04/05 Copyr 1984 Sun Micro 30 * $NetBSD: pmap_svc.c,v 1.2 2000/10/20 11:49:40 fvdl Exp $ 31 * $FreeBSD: src/usr.sbin/rpcbind/pmap_svc.c,v 1.5 2007/11/07 10:53:39 kevlo Exp $ 32 */ 33 /* 34 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc. 35 */ 36 37 /* 38 * pmap_svc.c 39 * The server procedure for the version 2 portmaper. 40 * All the portmapper related interface from the portmap side. 41 */ 42 43 #ifdef PORTMAP 44 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <stdio.h> 47 #include <rpc/rpc.h> 48 #include <rpc/pmap_prot.h> 49 #include <rpc/rpcb_prot.h> 50 #ifdef RPCBIND_DEBUG 51 #include <stdlib.h> 52 #endif 53 #include "rpcbind.h" 54 55 static struct pmaplist *find_service_pmap(rpcprog_t, rpcvers_t, rpcprot_t); 56 static bool_t pmapproc_change(struct svc_req *, SVCXPRT *, u_long); 57 static bool_t pmapproc_getport(struct svc_req *, SVCXPRT *); 58 static bool_t pmapproc_dump(struct svc_req *, SVCXPRT *); 59 60 /* 61 * Called for all the version 2 inquiries. 62 */ 63 void 64 pmap_service(struct svc_req *rqstp, SVCXPRT *xprt) 65 { 66 rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc); 67 switch (rqstp->rq_proc) { 68 case PMAPPROC_NULL: 69 /* 70 * Null proc call 71 */ 72 #ifdef RPCBIND_DEBUG 73 if (debugging) 74 fprintf(stderr, "PMAPPROC_NULL\n"); 75 #endif 76 check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS); 77 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_void, NULL)) && 78 debugging) { 79 if (doabort) { 80 rpcbind_abort(); 81 } 82 } 83 break; 84 85 case PMAPPROC_SET: 86 /* 87 * Set a program, version to port mapping 88 */ 89 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 90 break; 91 92 case PMAPPROC_UNSET: 93 /* 94 * Remove a program, version to port mapping. 95 */ 96 pmapproc_change(rqstp, xprt, rqstp->rq_proc); 97 break; 98 99 case PMAPPROC_GETPORT: 100 /* 101 * Lookup the mapping for a program, version and return its 102 * port number. 103 */ 104 pmapproc_getport(rqstp, xprt); 105 break; 106 107 case PMAPPROC_DUMP: 108 /* 109 * Return the current set of mapped program, version 110 */ 111 #ifdef RPCBIND_DEBUG 112 if (debugging) 113 fprintf(stderr, "PMAPPROC_DUMP\n"); 114 #endif 115 pmapproc_dump(rqstp, xprt); 116 break; 117 118 case PMAPPROC_CALLIT: 119 /* 120 * Calls a procedure on the local machine. If the requested 121 * procedure is not registered this procedure does not return 122 * error information!! 123 * This procedure is only supported on rpc/udp and calls via 124 * rpc/udp. It passes null authentication parameters. 125 */ 126 rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS); 127 break; 128 129 default: 130 svcerr_noproc(xprt); 131 break; 132 } 133 } 134 135 /* 136 * returns the item with the given program, version number. If that version 137 * number is not found, it returns the item with that program number, so that 138 * the port number is now returned to the caller. The caller when makes a 139 * call to this program, version number, the call will fail and it will 140 * return with PROGVERS_MISMATCH. The user can then determine the highest 141 * and the lowest version number for this program using clnt_geterr() and 142 * use those program version numbers. 143 */ 144 static struct pmaplist * 145 find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot) 146 { 147 struct pmaplist *hit = NULL; 148 struct pmaplist *pml; 149 150 for (pml = list_pml; pml != NULL; pml = pml->pml_next) { 151 if ((pml->pml_map.pm_prog != prog) || 152 (pml->pml_map.pm_prot != prot)) 153 continue; 154 hit = pml; 155 if (pml->pml_map.pm_vers == vers) 156 break; 157 } 158 return (hit); 159 } 160 161 static bool_t 162 pmapproc_change(struct svc_req *rqstp __unused, SVCXPRT *xprt, unsigned long op) 163 { 164 struct pmap reg; 165 RPCB rpcbreg; 166 long ans; 167 struct sockaddr_in *who; 168 uid_t uid; 169 char uidbuf[32]; 170 171 #ifdef RPCBIND_DEBUG 172 if (debugging) 173 fprintf(stderr, "%s request for (%lu, %lu) : ", 174 op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET", 175 reg.pm_prog, reg.pm_vers); 176 #endif 177 178 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 179 svcerr_decode(xprt); 180 return (FALSE); 181 } 182 183 if (!check_access(xprt, op, ®, PMAPVERS)) { 184 svcerr_weakauth(xprt); 185 return FALSE; 186 } 187 188 who = svc_getcaller(xprt); 189 190 /* 191 * Can't use getpwnam here. We might end up calling ourselves 192 * and looping. 193 */ 194 if (__rpc_get_local_uid(xprt, &uid) < 0) 195 rpcbreg.r_owner = "unknown"; 196 else if (uid == 0) 197 rpcbreg.r_owner = "superuser"; 198 else { 199 /* r_owner will be strdup-ed later */ 200 snprintf(uidbuf, sizeof uidbuf, "%d", uid); 201 rpcbreg.r_owner = uidbuf; 202 } 203 204 rpcbreg.r_prog = reg.pm_prog; 205 rpcbreg.r_vers = reg.pm_vers; 206 207 if (op == PMAPPROC_SET) { 208 char buf[32]; 209 210 snprintf(buf, sizeof buf, "0.0.0.0.%d.%d", 211 (int)((reg.pm_port >> 8) & 0xff), 212 (int)(reg.pm_port & 0xff)); 213 rpcbreg.r_addr = buf; 214 if (reg.pm_prot == IPPROTO_UDP) { 215 rpcbreg.r_netid = udptrans; 216 } else if (reg.pm_prot == IPPROTO_TCP) { 217 rpcbreg.r_netid = tcptrans; 218 } else { 219 ans = FALSE; 220 goto done_change; 221 } 222 ans = map_set(&rpcbreg, rpcbreg.r_owner); 223 } else if (op == PMAPPROC_UNSET) { 224 bool_t ans1, ans2; 225 226 rpcbreg.r_addr = NULL; 227 rpcbreg.r_netid = tcptrans; 228 ans1 = map_unset(&rpcbreg, rpcbreg.r_owner); 229 rpcbreg.r_netid = udptrans; 230 ans2 = map_unset(&rpcbreg, rpcbreg.r_owner); 231 ans = ans1 || ans2; 232 } else { 233 ans = FALSE; 234 } 235 done_change: 236 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t) &ans)) && 237 debugging) { 238 fprintf(stderr, "portmap: svc_sendreply\n"); 239 if (doabort) { 240 rpcbind_abort(); 241 } 242 } 243 #ifdef RPCBIND_DEBUG 244 if (debugging) 245 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 246 #endif 247 if (op == PMAPPROC_SET) 248 rpcbs_set(RPCBVERS_2_STAT, ans); 249 else 250 rpcbs_unset(RPCBVERS_2_STAT, ans); 251 return (TRUE); 252 } 253 254 /* ARGSUSED */ 255 static bool_t 256 pmapproc_getport(struct svc_req *rqstp __unused, SVCXPRT *xprt) 257 { 258 struct pmap reg; 259 long lport; 260 int port = 0; 261 struct pmaplist *fnd; 262 #ifdef RPCBIND_DEBUG 263 char *uaddr; 264 #endif 265 266 if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) { 267 svcerr_decode(xprt); 268 return (FALSE); 269 } 270 271 if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) { 272 svcerr_weakauth(xprt); 273 return FALSE; 274 } 275 276 #ifdef RPCBIND_DEBUG 277 if (debugging) { 278 uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid), 279 svc_getrpccaller(xprt)); 280 fprintf(stderr, "PMAP_GETPORT req for (%lu, %lu, %s) from %s :", 281 reg.pm_prog, reg.pm_vers, 282 reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr); 283 free(uaddr); 284 } 285 #endif 286 fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot); 287 if (fnd) { 288 char serveuaddr[32], *ua; 289 int h1, h2, h3, h4, p1, p2; 290 char *netid; 291 292 if (reg.pm_prot == IPPROTO_UDP) { 293 ua = udp_uaddr; 294 netid = udptrans; 295 } else { 296 ua = tcp_uaddr; /* To get the len */ 297 netid = tcptrans; 298 } 299 if (ua == NULL) { 300 goto sendreply; 301 } 302 if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3, 303 &h4, &p1, &p2) == 6) { 304 p1 = (fnd->pml_map.pm_port >> 8) & 0xff; 305 p2 = (fnd->pml_map.pm_port) & 0xff; 306 snprintf(serveuaddr, sizeof serveuaddr, 307 "%d.%d.%d.%d.%d.%d", h1, h2, h3, h4, p1, p2); 308 if (is_bound(netid, serveuaddr)) { 309 port = fnd->pml_map.pm_port; 310 } else { /* this service is dead; delete it */ 311 delete_prog(reg.pm_prog); 312 } 313 } 314 } 315 sendreply: 316 lport = port; 317 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) && 318 debugging) { 319 fprintf(stderr, "portmap: svc_sendreply\n"); 320 if (doabort) { 321 rpcbind_abort(); 322 } 323 } 324 #ifdef RPCBIND_DEBUG 325 if (debugging) 326 fprintf(stderr, "port = %d\n", port); 327 #endif 328 rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers, 329 reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans, 330 port ? udptrans : ""); 331 332 return (TRUE); 333 } 334 335 /* ARGSUSED */ 336 static bool_t 337 pmapproc_dump(struct svc_req *rqstp __unused, SVCXPRT *xprt) 338 { 339 if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) { 340 svcerr_decode(xprt); 341 return (FALSE); 342 } 343 344 if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) { 345 svcerr_weakauth(xprt); 346 return FALSE; 347 } 348 349 if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr, 350 (caddr_t)&list_pml)) && debugging) { 351 if (debugging) 352 fprintf(stderr, "portmap: svc_sendreply\n"); 353 if (doabort) { 354 rpcbind_abort(); 355 } 356 } 357 return (TRUE); 358 } 359 360 #endif /* PORTMAP */ 361