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 return (0); 126 } 127 l->xprt = xprt; 128 l->next = xprtlist; 129 xprtlist = l; 130 num++; 131 } 132 } 133 mutex_unlock(&xprtlist_lock); 134 } 135 __rpc_endconf(handle); 136 /* 137 * In case of num == 0; the error messages are generated by the 138 * underlying layers; and hence not needed here. 139 */ 140 return (num); 141 } 142 143 /* 144 * The high level interface to svc_tli_create(). 145 * It tries to create a server for "nconf" and registers the service 146 * with the rpcbind. It calls svc_tli_create(); 147 * 148 * prognum - Program number 149 * versnum - Version number 150 * ncofn - Netconfig structure for the network 151 */ 152 SVCXPRT * 153 svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 154 rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf) 155 { 156 SVCXPRT *xprt; 157 158 if (nconf == NULL) { 159 warnx( 160 "svc_tp_create: invalid netconfig structure for prog %u vers %u", 161 (unsigned)prognum, (unsigned)versnum); 162 return (NULL); 163 } 164 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 165 if (xprt == NULL) { 166 return (NULL); 167 } 168 /*LINTED const castaway*/ 169 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 170 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 171 warnx( 172 "svc_tp_create: Could not register prog %u vers %u on %s", 173 (unsigned)prognum, (unsigned)versnum, 174 nconf->nc_netid); 175 SVC_DESTROY(xprt); 176 return (NULL); 177 } 178 return (xprt); 179 } 180 181 /* 182 * If fd is RPC_ANYFD, then it opens a fd for the given transport 183 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 184 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 185 * NULL bindadr and Connection oriented transports, the value of qlen 186 * is set to 8. 187 * 188 * If sendsz or recvsz are zero, their default values are chosen. 189 * 190 * fd - Connection end point 191 * nconf - Netconfig struct for nettoken 192 * bindaddr - Local bind address 193 * sendsz - Max sendsize 194 * recvxz - Max recvsize 195 */ 196 SVCXPRT * 197 svc_tli_create(int fd, const struct netconfig *nconf, 198 const struct t_bind *bindaddr, u_int sendsz, u_int recvsz) 199 { 200 SVCXPRT *xprt = NULL; /* service handle */ 201 bool_t madefd = FALSE; /* whether fd opened here */ 202 struct __rpc_sockinfo si; 203 struct sockaddr_storage ss; 204 socklen_t slen; 205 206 if (fd == RPC_ANYFD) { 207 if (nconf == NULL) { 208 warnx("svc_tli_create: invalid netconfig"); 209 return (NULL); 210 } 211 fd = __rpc_nconf2fd(nconf); 212 if (fd == -1) { 213 warnx( 214 "svc_tli_create: could not open connection for %s", 215 nconf->nc_netid); 216 return (NULL); 217 } 218 __rpc_nconf2sockinfo(nconf, &si); 219 madefd = TRUE; 220 } else { 221 /* 222 * It is an open descriptor. Get the transport info. 223 */ 224 if (!__rpc_fd2sockinfo(fd, &si)) { 225 warnx( 226 "svc_tli_create: could not get transport information"); 227 return (NULL); 228 } 229 } 230 231 /* 232 * If the fd is unbound, try to bind it. 233 */ 234 if (madefd || !__rpc_sockisbound(fd)) { 235 if (bindaddr == NULL) { 236 if (bindresvport(fd, NULL) < 0) { 237 memset(&ss, 0, sizeof ss); 238 ss.ss_family = si.si_af; 239 ss.ss_len = si.si_alen; 240 if (_bind(fd, (struct sockaddr *)(void *)&ss, 241 (socklen_t)si.si_alen) < 0) { 242 warnx( 243 "svc_tli_create: could not bind to anonymous port"); 244 goto freedata; 245 } 246 } 247 _listen(fd, SOMAXCONN); 248 } else { 249 if (_bind(fd, 250 (struct sockaddr *)bindaddr->addr.buf, 251 (socklen_t)si.si_alen) < 0) { 252 warnx( 253 "svc_tli_create: could not bind to requested address"); 254 goto freedata; 255 } 256 _listen(fd, (int)bindaddr->qlen); 257 } 258 259 } 260 /* 261 * call transport specific function. 262 */ 263 switch (si.si_socktype) { 264 case SOCK_STREAM: 265 slen = sizeof ss; 266 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 267 == 0) { 268 /* accepted socket */ 269 xprt = svc_fd_create(fd, sendsz, recvsz); 270 } else 271 xprt = svc_vc_create(fd, sendsz, recvsz); 272 if (!nconf || !xprt) 273 break; 274 #if 0 275 /* XXX fvdl */ 276 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 277 strcmp(nconf->nc_protofmly, "inet6") == 0) 278 (void) __svc_vc_setflag(xprt, TRUE); 279 #endif 280 break; 281 case SOCK_DGRAM: 282 xprt = svc_dg_create(fd, sendsz, recvsz); 283 break; 284 default: 285 warnx("svc_tli_create: bad service type"); 286 goto freedata; 287 } 288 289 if (xprt == NULL) 290 /* 291 * The error messages here are spitted out by the lower layers: 292 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 293 */ 294 goto freedata; 295 296 /* Fill in type of service */ 297 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 298 299 if (nconf) { 300 xprt->xp_netid = strdup(nconf->nc_netid); 301 xprt->xp_tp = strdup(nconf->nc_device); 302 } 303 return (xprt); 304 305 freedata: 306 if (madefd) 307 (void)_close(fd); 308 if (xprt) { 309 if (!madefd) /* so that svc_destroy doesnt close fd */ 310 xprt->xp_fd = RPC_ANYFD; 311 SVC_DESTROY(xprt); 312 } 313 return (NULL); 314 } 315