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