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 "opt_inet6.h" 43 44 #include <sys/param.h> 45 #include <sys/lock.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <sys/mutex.h> 49 #include <sys/protosw.h> 50 #include <sys/queue.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/systm.h> 54 #include <sys/sx.h> 55 #include <sys/ucred.h> 56 57 #include <net/vnet.h> 58 59 #include <rpc/rpc.h> 60 #include <rpc/rpcb_clnt.h> 61 #include <rpc/nettype.h> 62 63 #include <rpc/rpc_com.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( 78 SVCPOOL *pool, 79 void (*dispatch)(struct svc_req *, SVCXPRT *), 80 rpcprog_t prognum, /* Program number */ 81 rpcvers_t versnum, /* Version number */ 82 const char *nettype) /* Networktype token */ 83 { 84 int g, num = 0; 85 SVCGROUP *grp; 86 SVCXPRT *xprt; 87 struct netconfig *nconf; 88 void *handle; 89 90 if ((handle = __rpc_setconf(nettype)) == NULL) { 91 printf("svc_create: unknown protocol"); 92 return (0); 93 } 94 while ((nconf = __rpc_getconf(handle)) != NULL) { 95 for (g = 0; g < SVC_MAXGROUPS; g++) { 96 grp = &pool->sp_groups[g]; 97 mtx_lock(&grp->sg_lock); 98 TAILQ_FOREACH(xprt, &grp->sg_xlist, xp_link) { 99 if (strcmp(xprt->xp_netid, nconf->nc_netid)) 100 continue; 101 /* Found an old one, use it */ 102 mtx_unlock(&grp->sg_lock); 103 (void) rpcb_unset(prognum, versnum, nconf); 104 if (svc_reg(xprt, prognum, versnum, 105 dispatch, nconf) == FALSE) { 106 printf( 107 "svc_create: could not register prog %u vers %u on %s\n", 108 (unsigned)prognum, (unsigned)versnum, 109 nconf->nc_netid); 110 mtx_lock(&grp->sg_lock); 111 } else { 112 num++; 113 mtx_lock(&grp->sg_lock); 114 break; 115 } 116 } 117 mtx_unlock(&grp->sg_lock); 118 } 119 if (xprt == NULL) { 120 /* It was not found. Now create a new one */ 121 xprt = svc_tp_create(pool, dispatch, prognum, versnum, 122 NULL, nconf); 123 if (xprt) { 124 num++; 125 SVC_RELEASE(xprt); 126 } 127 } 128 } 129 __rpc_endconf(handle); 130 /* 131 * In case of num == 0; the error messages are generated by the 132 * underlying layers; and hence not needed here. 133 */ 134 return (num); 135 } 136 137 /* 138 * The high level interface to svc_tli_create(). 139 * It tries to create a server for "nconf" and registers the service 140 * with the rpcbind. It calls svc_tli_create(); 141 */ 142 SVCXPRT * 143 svc_tp_create( 144 SVCPOOL *pool, 145 void (*dispatch)(struct svc_req *, SVCXPRT *), 146 rpcprog_t prognum, /* Program number */ 147 rpcvers_t versnum, /* Version number */ 148 const char *uaddr, /* Address (or null for default) */ 149 const struct netconfig *nconf) /* Netconfig structure for the network */ 150 { 151 struct netconfig nconfcopy; 152 struct netbuf *taddr; 153 struct t_bind bind; 154 SVCXPRT *xprt; 155 156 if (nconf == NULL) { 157 printf( 158 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n", 159 (unsigned)prognum, (unsigned)versnum); 160 return (NULL); 161 } 162 if (uaddr) { 163 taddr = uaddr2taddr(nconf, uaddr); 164 bind.addr = *taddr; 165 free(taddr, M_RPC); 166 bind.qlen = -1; 167 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0); 168 free(bind.addr.buf, M_RPC); 169 } else { 170 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0); 171 } 172 if (xprt == NULL) { 173 return (NULL); 174 } 175 /*LINTED const castaway*/ 176 nconfcopy = *nconf; 177 (void) rpcb_unset(prognum, versnum, &nconfcopy); 178 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 179 printf( 180 "svc_tp_create: Could not register prog %u vers %u on %s\n", 181 (unsigned)prognum, (unsigned)versnum, 182 nconf->nc_netid); 183 xprt_unregister(xprt); 184 SVC_RELEASE(xprt); 185 return (NULL); 186 } 187 return (xprt); 188 } 189 190 /* 191 * If so is NULL, then it opens a socket for the given transport 192 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 193 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 194 * NULL bindadr and Connection oriented transports, the value of qlen 195 * is set to 8. 196 * 197 * If sendsz or recvsz are zero, their default values are chosen. 198 */ 199 SVCXPRT * 200 svc_tli_create( 201 SVCPOOL *pool, 202 struct socket *so, /* Connection end point */ 203 const struct netconfig *nconf, /* Netconfig struct for nettoken */ 204 const struct t_bind *bindaddr, /* Local bind address */ 205 size_t sendsz, /* Max sendsize */ 206 size_t recvsz) /* Max recvsize */ 207 { 208 SVCXPRT *xprt = NULL; /* service handle */ 209 bool_t madeso = FALSE; /* whether so opened here */ 210 struct __rpc_sockinfo si; 211 struct sockaddr_storage ss; 212 213 if (!so) { 214 if (nconf == NULL) { 215 printf("svc_tli_create: invalid netconfig\n"); 216 return (NULL); 217 } 218 so = __rpc_nconf2socket(nconf); 219 if (!so) { 220 printf( 221 "svc_tli_create: could not open connection for %s\n", 222 nconf->nc_netid); 223 return (NULL); 224 } 225 __rpc_nconf2sockinfo(nconf, &si); 226 madeso = TRUE; 227 } else { 228 /* 229 * It is an open socket. Get the transport info. 230 */ 231 if (!__rpc_socket2sockinfo(so, &si)) { 232 printf( 233 "svc_tli_create: could not get transport information\n"); 234 return (NULL); 235 } 236 } 237 238 /* 239 * If the socket is unbound, try to bind it. 240 */ 241 if (madeso || !__rpc_sockisbound(so)) { 242 if (bindaddr == NULL) { 243 if (bindresvport(so, NULL)) { 244 memset(&ss, 0, sizeof ss); 245 ss.ss_family = si.si_af; 246 ss.ss_len = si.si_alen; 247 if (sobind(so, (struct sockaddr *)&ss, 248 curthread)) { 249 printf( 250 "svc_tli_create: could not bind to anonymous port\n"); 251 goto freedata; 252 } 253 } 254 solisten(so, -1, curthread); 255 } else { 256 if (bindresvport(so, 257 (struct sockaddr *)bindaddr->addr.buf)) { 258 printf( 259 "svc_tli_create: could not bind to requested address\n"); 260 goto freedata; 261 } 262 solisten(so, (int)bindaddr->qlen, curthread); 263 } 264 265 } 266 /* 267 * call transport specific function. 268 */ 269 switch (si.si_socktype) { 270 case SOCK_STREAM: 271 #if 0 272 slen = sizeof ss; 273 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 274 == 0) { 275 /* accepted socket */ 276 xprt = svc_fd_create(fd, sendsz, recvsz); 277 } else 278 #endif 279 xprt = svc_vc_create(pool, so, sendsz, recvsz); 280 if (!nconf || !xprt) 281 break; 282 #if 0 283 /* XXX fvdl */ 284 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 285 strcmp(nconf->nc_protofmly, "inet6") == 0) 286 (void) __svc_vc_setflag(xprt, TRUE); 287 #endif 288 break; 289 case SOCK_DGRAM: 290 xprt = svc_dg_create(pool, so, sendsz, recvsz); 291 break; 292 default: 293 printf("svc_tli_create: bad service type"); 294 goto freedata; 295 } 296 297 if (xprt == NULL) 298 /* 299 * The error messages here are spitted out by the lower layers: 300 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 301 */ 302 goto freedata; 303 304 /* Fill in type of service */ 305 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 306 307 if (nconf) { 308 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC); 309 } 310 return (xprt); 311 312 freedata: 313 if (madeso) 314 (void)soclose(so); 315 if (xprt) { 316 if (!madeso) /* so that svc_destroy doesnt close fd */ 317 xprt->xp_socket = NULL; 318 xprt_unregister(xprt); 319 } 320 return (NULL); 321 } 322