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 /* 38 * svc_generic.c, Server side for RPC. 39 * 40 */ 41 42 #include "namespace.h" 43 #include "reentrant.h" 44 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <netinet/in.h> 47 #include <rpc/rpc.h> 48 #include <rpc/nettype.h> 49 #include <stdio.h> 50 #include <errno.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <err.h> 55 #include "un-namespace.h" 56 57 #include "rpc_com.h" 58 #include "mt_misc.h" 59 60 extern int __svc_vc_setflag(SVCXPRT *, int); 61 62 /* 63 * The highest level interface for server creation. 64 * It tries for all the nettokens in that particular class of token 65 * and returns the number of handles it can create and/or find. 66 * 67 * It creates a link list of all the handles it could create. 68 * If svc_create() is called multiple times, it uses the handle 69 * created earlier instead of creating a new handle every time. 70 * 71 * prognum - Program number 72 * versnum - Version number 73 * nettype - Networktype token 74 */ 75 int 76 svc_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 77 rpcprog_t prognum, rpcvers_t versnum, const char *nettype) 78 { 79 struct xlist { 80 SVCXPRT *xprt; /* Server handle */ 81 struct xlist *next; /* Next item */ 82 } *l; 83 static struct xlist *xprtlist; /* A link list of all the handles */ 84 int num = 0; 85 SVCXPRT *xprt; 86 struct netconfig *nconf; 87 void *handle; 88 89 /* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */ 90 91 if ((handle = __rpc_setconf(nettype)) == NULL) { 92 warnx("svc_create: unknown protocol"); 93 return (0); 94 } 95 while ((nconf = __rpc_getconf(handle)) != NULL) { 96 mutex_lock(&xprtlist_lock); 97 for (l = xprtlist; l; l = l->next) { 98 if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) { 99 /* Found an old one, use it */ 100 (void) rpcb_unset(prognum, versnum, nconf); 101 if (svc_reg(l->xprt, prognum, versnum, 102 dispatch, nconf) == FALSE) 103 warnx( 104 "svc_create: could not register prog %u vers %u on %s", 105 (unsigned)prognum, (unsigned)versnum, 106 nconf->nc_netid); 107 else 108 num++; 109 break; 110 } 111 } 112 if (l == NULL) { 113 /* It was not found. Now create a new one */ 114 xprt = svc_tp_create(dispatch, prognum, versnum, nconf); 115 if (xprt) { 116 l = (struct xlist *)malloc(sizeof (*l)); 117 if (l == NULL) { 118 warnx("svc_create: no memory"); 119 mutex_unlock(&xprtlist_lock); 120 num = 0; 121 goto done; 122 } 123 l->xprt = xprt; 124 l->next = xprtlist; 125 xprtlist = l; 126 num++; 127 } 128 } 129 mutex_unlock(&xprtlist_lock); 130 } 131 done: 132 __rpc_endconf(handle); 133 /* 134 * In case of num == 0; the error messages are generated by the 135 * underlying layers; and hence not needed here. 136 */ 137 return (num); 138 } 139 140 /* 141 * The high level interface to svc_tli_create(). 142 * It tries to create a server for "nconf" and registers the service 143 * with the rpcbind. It calls svc_tli_create(); 144 * 145 * prognum - Program number 146 * versnum - Version number 147 * ncofn - Netconfig structure for the network 148 */ 149 SVCXPRT * 150 svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 151 rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf) 152 { 153 SVCXPRT *xprt; 154 155 if (nconf == NULL) { 156 warnx( 157 "svc_tp_create: invalid netconfig structure for prog %u vers %u", 158 (unsigned)prognum, (unsigned)versnum); 159 return (NULL); 160 } 161 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 162 if (xprt == NULL) { 163 return (NULL); 164 } 165 /*LINTED const castaway*/ 166 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 167 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 168 warnx( 169 "svc_tp_create: Could not register prog %u vers %u on %s", 170 (unsigned)prognum, (unsigned)versnum, 171 nconf->nc_netid); 172 SVC_DESTROY(xprt); 173 return (NULL); 174 } 175 return (xprt); 176 } 177 178 /* 179 * If fd is RPC_ANYFD, then it opens a fd for the given transport 180 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 181 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 182 * NULL bindadr and Connection oriented transports, the value of qlen 183 * is set to 8. 184 * 185 * If sendsz or recvsz are zero, their default values are chosen. 186 * 187 * fd - Connection end point 188 * nconf - Netconfig struct for nettoken 189 * bindaddr - Local bind address 190 * sendsz - Max sendsize 191 * recvxz - Max recvsize 192 */ 193 SVCXPRT * 194 svc_tli_create(int fd, const struct netconfig *nconf, 195 const struct t_bind *bindaddr, u_int sendsz, u_int recvsz) 196 { 197 SVCXPRT *xprt = NULL; /* service handle */ 198 bool_t madefd = FALSE; /* whether fd opened here */ 199 struct __rpc_sockinfo si; 200 struct sockaddr_storage ss; 201 socklen_t slen; 202 203 if (fd == RPC_ANYFD) { 204 if (nconf == NULL) { 205 warnx("svc_tli_create: invalid netconfig"); 206 return (NULL); 207 } 208 fd = __rpc_nconf2fd(nconf); 209 if (fd == -1) { 210 warnx( 211 "svc_tli_create: could not open connection for %s", 212 nconf->nc_netid); 213 return (NULL); 214 } 215 __rpc_nconf2sockinfo(nconf, &si); 216 madefd = TRUE; 217 } else { 218 /* 219 * It is an open descriptor. Get the transport info. 220 */ 221 if (!__rpc_fd2sockinfo(fd, &si)) { 222 warnx( 223 "svc_tli_create: could not get transport information"); 224 return (NULL); 225 } 226 } 227 228 /* 229 * If the fd is unbound, try to bind it. 230 */ 231 if (madefd || !__rpc_sockisbound(fd)) { 232 if (bindaddr == NULL) { 233 if (bindresvport(fd, NULL) < 0) { 234 memset(&ss, 0, sizeof ss); 235 ss.ss_family = si.si_af; 236 ss.ss_len = si.si_alen; 237 if (_bind(fd, (struct sockaddr *)(void *)&ss, 238 (socklen_t)si.si_alen) < 0) { 239 warnx( 240 "svc_tli_create: could not bind to anonymous port"); 241 goto freedata; 242 } 243 } 244 _listen(fd, SOMAXCONN); 245 } else { 246 if (_bind(fd, 247 (struct sockaddr *)bindaddr->addr.buf, 248 (socklen_t)si.si_alen) < 0) { 249 warnx( 250 "svc_tli_create: could not bind to requested address"); 251 goto freedata; 252 } 253 _listen(fd, (int)bindaddr->qlen); 254 } 255 256 } 257 /* 258 * call transport specific function. 259 */ 260 switch (si.si_socktype) { 261 case SOCK_STREAM: 262 slen = sizeof ss; 263 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 264 == 0) { 265 /* accepted socket */ 266 xprt = svc_fd_create(fd, sendsz, recvsz); 267 } else 268 xprt = svc_vc_create(fd, sendsz, recvsz); 269 if (!nconf || !xprt) 270 break; 271 #if 0 272 /* XXX fvdl */ 273 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 274 strcmp(nconf->nc_protofmly, "inet6") == 0) 275 (void) __svc_vc_setflag(xprt, TRUE); 276 #endif 277 break; 278 case SOCK_DGRAM: 279 xprt = svc_dg_create(fd, sendsz, recvsz); 280 break; 281 default: 282 warnx("svc_tli_create: bad service type"); 283 goto freedata; 284 } 285 286 if (xprt == NULL) 287 /* 288 * The error messages here are spitted out by the lower layers: 289 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 290 */ 291 goto freedata; 292 293 /* Fill in type of service */ 294 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 295 296 if (nconf) { 297 xprt->xp_netid = strdup(nconf->nc_netid); 298 xprt->xp_tp = strdup(nconf->nc_device); 299 } 300 return (xprt); 301 302 freedata: 303 if (madefd) 304 (void)_close(fd); 305 if (xprt) { 306 if (!madefd) /* so that svc_destroy doesnt close fd */ 307 xprt->xp_fd = RPC_ANYFD; 308 SVC_DESTROY(xprt); 309 } 310 return (NULL); 311 } 312