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