1 /* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI" 39 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro"; 40 #endif 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 /* 45 * svc_generic.c, Server side for RPC. 46 * 47 */ 48 49 #include "namespace.h" 50 #include "reentrant.h" 51 #include <sys/types.h> 52 #include <sys/socket.h> 53 #include <netinet/in.h> 54 #include <rpc/rpc.h> 55 #include <rpc/nettype.h> 56 #include <stdio.h> 57 #include <errno.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <err.h> 62 #include "un-namespace.h" 63 64 #include "rpc_com.h" 65 #include "mt_misc.h" 66 67 extern int __svc_vc_setflag(SVCXPRT *, int); 68 69 /* 70 * The highest level interface for server creation. 71 * It tries for all the nettokens in that particular class of token 72 * and returns the number of handles it can create and/or find. 73 * 74 * It creates a link list of all the handles it could create. 75 * If svc_create() is called multiple times, it uses the handle 76 * created earlier instead of creating a new handle every time. 77 * 78 * prognum - Program number 79 * versnum - Version number 80 * nettype - Networktype token 81 */ 82 int 83 svc_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 84 rpcprog_t prognum, rpcvers_t versnum, const char *nettype) 85 { 86 struct xlist { 87 SVCXPRT *xprt; /* Server handle */ 88 struct xlist *next; /* Next item */ 89 } *l; 90 static struct xlist *xprtlist; /* A link list of all the handles */ 91 int num = 0; 92 SVCXPRT *xprt; 93 struct netconfig *nconf; 94 void *handle; 95 96 /* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */ 97 98 if ((handle = __rpc_setconf(nettype)) == NULL) { 99 warnx("svc_create: unknown protocol"); 100 return (0); 101 } 102 while ((nconf = __rpc_getconf(handle)) != NULL) { 103 mutex_lock(&xprtlist_lock); 104 for (l = xprtlist; l; l = l->next) { 105 if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) { 106 /* Found an old one, use it */ 107 (void) rpcb_unset(prognum, versnum, nconf); 108 if (svc_reg(l->xprt, prognum, versnum, 109 dispatch, nconf) == FALSE) 110 warnx( 111 "svc_create: could not register prog %u vers %u on %s", 112 (unsigned)prognum, (unsigned)versnum, 113 nconf->nc_netid); 114 else 115 num++; 116 break; 117 } 118 } 119 if (l == NULL) { 120 /* It was not found. Now create a new one */ 121 xprt = svc_tp_create(dispatch, prognum, versnum, nconf); 122 if (xprt) { 123 l = (struct xlist *)malloc(sizeof (*l)); 124 if (l == NULL) { 125 warnx("svc_create: no memory"); 126 mutex_unlock(&xprtlist_lock); 127 num = 0; 128 goto done; 129 } 130 l->xprt = xprt; 131 l->next = xprtlist; 132 xprtlist = l; 133 num++; 134 } 135 } 136 mutex_unlock(&xprtlist_lock); 137 } 138 done: 139 __rpc_endconf(handle); 140 /* 141 * In case of num == 0; the error messages are generated by the 142 * underlying layers; and hence not needed here. 143 */ 144 return (num); 145 } 146 147 /* 148 * The high level interface to svc_tli_create(). 149 * It tries to create a server for "nconf" and registers the service 150 * with the rpcbind. It calls svc_tli_create(); 151 * 152 * prognum - Program number 153 * versnum - Version number 154 * ncofn - Netconfig structure for the network 155 */ 156 SVCXPRT * 157 svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 158 rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf) 159 { 160 SVCXPRT *xprt; 161 162 if (nconf == NULL) { 163 warnx( 164 "svc_tp_create: invalid netconfig structure for prog %u vers %u", 165 (unsigned)prognum, (unsigned)versnum); 166 return (NULL); 167 } 168 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 169 if (xprt == NULL) { 170 return (NULL); 171 } 172 /*LINTED const castaway*/ 173 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 174 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 175 warnx( 176 "svc_tp_create: Could not register prog %u vers %u on %s", 177 (unsigned)prognum, (unsigned)versnum, 178 nconf->nc_netid); 179 SVC_DESTROY(xprt); 180 return (NULL); 181 } 182 return (xprt); 183 } 184 185 /* 186 * If fd is RPC_ANYFD, then it opens a fd for the given transport 187 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 188 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 189 * NULL bindadr and Connection oriented transports, the value of qlen 190 * is set to 8. 191 * 192 * If sendsz or recvsz are zero, their default values are chosen. 193 * 194 * fd - Connection end point 195 * nconf - Netconfig struct for nettoken 196 * bindaddr - Local bind address 197 * sendsz - Max sendsize 198 * recvxz - Max recvsize 199 */ 200 SVCXPRT * 201 svc_tli_create(int fd, const struct netconfig *nconf, 202 const struct t_bind *bindaddr, u_int sendsz, u_int recvsz) 203 { 204 SVCXPRT *xprt = NULL; /* service handle */ 205 bool_t madefd = FALSE; /* whether fd opened here */ 206 struct __rpc_sockinfo si; 207 struct sockaddr_storage ss; 208 socklen_t slen; 209 210 if (fd == RPC_ANYFD) { 211 if (nconf == NULL) { 212 warnx("svc_tli_create: invalid netconfig"); 213 return (NULL); 214 } 215 fd = __rpc_nconf2fd(nconf); 216 if (fd == -1) { 217 warnx( 218 "svc_tli_create: could not open connection for %s", 219 nconf->nc_netid); 220 return (NULL); 221 } 222 __rpc_nconf2sockinfo(nconf, &si); 223 madefd = TRUE; 224 } else { 225 /* 226 * It is an open descriptor. Get the transport info. 227 */ 228 if (!__rpc_fd2sockinfo(fd, &si)) { 229 warnx( 230 "svc_tli_create: could not get transport information"); 231 return (NULL); 232 } 233 } 234 235 /* 236 * If the fd is unbound, try to bind it. 237 */ 238 if (madefd || !__rpc_sockisbound(fd)) { 239 if (bindaddr == NULL) { 240 if (bindresvport(fd, NULL) < 0) { 241 memset(&ss, 0, sizeof ss); 242 ss.ss_family = si.si_af; 243 ss.ss_len = si.si_alen; 244 if (_bind(fd, (struct sockaddr *)(void *)&ss, 245 (socklen_t)si.si_alen) < 0) { 246 warnx( 247 "svc_tli_create: could not bind to anonymous port"); 248 goto freedata; 249 } 250 } 251 _listen(fd, SOMAXCONN); 252 } else { 253 if (_bind(fd, 254 (struct sockaddr *)bindaddr->addr.buf, 255 (socklen_t)si.si_alen) < 0) { 256 warnx( 257 "svc_tli_create: could not bind to requested address"); 258 goto freedata; 259 } 260 _listen(fd, (int)bindaddr->qlen); 261 } 262 263 } 264 /* 265 * call transport specific function. 266 */ 267 switch (si.si_socktype) { 268 case SOCK_STREAM: 269 slen = sizeof ss; 270 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 271 == 0) { 272 /* accepted socket */ 273 xprt = svc_fd_create(fd, sendsz, recvsz); 274 } else 275 xprt = svc_vc_create(fd, sendsz, recvsz); 276 if (!nconf || !xprt) 277 break; 278 #if 0 279 /* XXX fvdl */ 280 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 281 strcmp(nconf->nc_protofmly, "inet6") == 0) 282 (void) __svc_vc_setflag(xprt, TRUE); 283 #endif 284 break; 285 case SOCK_DGRAM: 286 xprt = svc_dg_create(fd, sendsz, recvsz); 287 break; 288 default: 289 warnx("svc_tli_create: bad service type"); 290 goto freedata; 291 } 292 293 if (xprt == NULL) 294 /* 295 * The error messages here are spitted out by the lower layers: 296 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 297 */ 298 goto freedata; 299 300 /* Fill in type of service */ 301 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 302 303 if (nconf) { 304 xprt->xp_netid = strdup(nconf->nc_netid); 305 xprt->xp_tp = strdup(nconf->nc_device); 306 } 307 return (xprt); 308 309 freedata: 310 if (madefd) 311 (void)_close(fd); 312 if (xprt) { 313 if (!madefd) /* so that svc_destroy doesnt close fd */ 314 xprt->xp_fd = RPC_ANYFD; 315 SVC_DESTROY(xprt); 316 } 317 return (NULL); 318 } 319