1 /* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 /* 33 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI" 38 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro"; 39 #endif 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 /* 44 * svc_generic.c, Server side for RPC. 45 * 46 */ 47 48 #include "opt_inet6.h" 49 50 #include <sys/param.h> 51 #include <sys/lock.h> 52 #include <sys/kernel.h> 53 #include <sys/malloc.h> 54 #include <sys/mutex.h> 55 #include <sys/protosw.h> 56 #include <sys/queue.h> 57 #include <sys/socket.h> 58 #include <sys/socketvar.h> 59 #include <sys/systm.h> 60 #include <sys/sx.h> 61 #include <sys/ucred.h> 62 63 #include <net/vnet.h> 64 65 #include <rpc/rpc.h> 66 #include <rpc/rpcb_clnt.h> 67 #include <rpc/nettype.h> 68 69 #include <rpc/rpc_com.h> 70 71 extern int __svc_vc_setflag(SVCXPRT *, int); 72 73 /* 74 * The highest level interface for server creation. 75 * It tries for all the nettokens in that particular class of token 76 * and returns the number of handles it can create and/or find. 77 * 78 * It creates a link list of all the handles it could create. 79 * If svc_create() is called multiple times, it uses the handle 80 * created earlier instead of creating a new handle every time. 81 */ 82 int 83 svc_create( 84 SVCPOOL *pool, 85 void (*dispatch)(struct svc_req *, SVCXPRT *), 86 rpcprog_t prognum, /* Program number */ 87 rpcvers_t versnum, /* Version number */ 88 const char *nettype) /* Networktype token */ 89 { 90 int num = 0; 91 SVCXPRT *xprt; 92 struct netconfig *nconf; 93 void *handle; 94 95 if ((handle = __rpc_setconf(nettype)) == NULL) { 96 printf("svc_create: unknown protocol"); 97 return (0); 98 } 99 while ((nconf = __rpc_getconf(handle)) != NULL) { 100 mtx_lock(&pool->sp_lock); 101 TAILQ_FOREACH(xprt, &pool->sp_xlist, xp_link) { 102 if (strcmp(xprt->xp_netid, nconf->nc_netid) == 0) { 103 /* Found an old one, use it */ 104 mtx_unlock(&pool->sp_lock); 105 (void) rpcb_unset(prognum, versnum, nconf); 106 if (svc_reg(xprt, prognum, versnum, 107 dispatch, nconf) == FALSE) { 108 printf( 109 "svc_create: could not register prog %u vers %u on %s\n", 110 (unsigned)prognum, (unsigned)versnum, 111 nconf->nc_netid); 112 mtx_lock(&pool->sp_lock); 113 } else { 114 num++; 115 mtx_lock(&pool->sp_lock); 116 break; 117 } 118 } 119 } 120 mtx_unlock(&pool->sp_lock); 121 if (xprt == NULL) { 122 /* It was not found. Now create a new one */ 123 xprt = svc_tp_create(pool, dispatch, prognum, versnum, 124 NULL, nconf); 125 if (xprt) { 126 num++; 127 SVC_RELEASE(xprt); 128 } 129 } 130 } 131 __rpc_endconf(handle); 132 /* 133 * In case of num == 0; the error messages are generated by the 134 * underlying layers; and hence not needed here. 135 */ 136 return (num); 137 } 138 139 /* 140 * The high level interface to svc_tli_create(). 141 * It tries to create a server for "nconf" and registers the service 142 * with the rpcbind. It calls svc_tli_create(); 143 */ 144 SVCXPRT * 145 svc_tp_create( 146 SVCPOOL *pool, 147 void (*dispatch)(struct svc_req *, SVCXPRT *), 148 rpcprog_t prognum, /* Program number */ 149 rpcvers_t versnum, /* Version number */ 150 const char *uaddr, /* Address (or null for default) */ 151 const struct netconfig *nconf) /* Netconfig structure for the network */ 152 { 153 struct netconfig nconfcopy; 154 struct netbuf *taddr; 155 struct t_bind bind; 156 SVCXPRT *xprt; 157 158 if (nconf == NULL) { 159 printf( 160 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n", 161 (unsigned)prognum, (unsigned)versnum); 162 return (NULL); 163 } 164 if (uaddr) { 165 taddr = uaddr2taddr(nconf, uaddr); 166 bind.addr = *taddr; 167 free(taddr, M_RPC); 168 bind.qlen = SOMAXCONN; 169 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0); 170 free(bind.addr.buf, M_RPC); 171 } else { 172 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0); 173 } 174 if (xprt == NULL) { 175 return (NULL); 176 } 177 /*LINTED const castaway*/ 178 nconfcopy = *nconf; 179 (void) rpcb_unset(prognum, versnum, &nconfcopy); 180 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 181 printf( 182 "svc_tp_create: Could not register prog %u vers %u on %s\n", 183 (unsigned)prognum, (unsigned)versnum, 184 nconf->nc_netid); 185 xprt_unregister(xprt); 186 SVC_RELEASE(xprt); 187 return (NULL); 188 } 189 return (xprt); 190 } 191 192 /* 193 * If so is NULL, then it opens a socket for the given transport 194 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 195 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 196 * NULL bindadr and Connection oriented transports, the value of qlen 197 * is set to 8. 198 * 199 * If sendsz or recvsz are zero, their default values are chosen. 200 */ 201 SVCXPRT * 202 svc_tli_create( 203 SVCPOOL *pool, 204 struct socket *so, /* Connection end point */ 205 const struct netconfig *nconf, /* Netconfig struct for nettoken */ 206 const struct t_bind *bindaddr, /* Local bind address */ 207 size_t sendsz, /* Max sendsize */ 208 size_t recvsz) /* Max recvsize */ 209 { 210 SVCXPRT *xprt = NULL; /* service handle */ 211 bool_t madeso = FALSE; /* whether so opened here */ 212 struct __rpc_sockinfo si; 213 struct sockaddr_storage ss; 214 215 if (!so) { 216 if (nconf == NULL) { 217 printf("svc_tli_create: invalid netconfig\n"); 218 return (NULL); 219 } 220 so = __rpc_nconf2socket(nconf); 221 if (!so) { 222 printf( 223 "svc_tli_create: could not open connection for %s\n", 224 nconf->nc_netid); 225 return (NULL); 226 } 227 __rpc_nconf2sockinfo(nconf, &si); 228 madeso = TRUE; 229 } else { 230 /* 231 * It is an open socket. Get the transport info. 232 */ 233 if (!__rpc_socket2sockinfo(so, &si)) { 234 printf( 235 "svc_tli_create: could not get transport information\n"); 236 return (NULL); 237 } 238 } 239 240 /* 241 * If the socket is unbound, try to bind it. 242 */ 243 if (madeso || !__rpc_sockisbound(so)) { 244 if (bindaddr == NULL) { 245 if (bindresvport(so, NULL)) { 246 memset(&ss, 0, sizeof ss); 247 ss.ss_family = si.si_af; 248 ss.ss_len = si.si_alen; 249 if (sobind(so, (struct sockaddr *)&ss, 250 curthread)) { 251 printf( 252 "svc_tli_create: could not bind to anonymous port\n"); 253 goto freedata; 254 } 255 } 256 solisten(so, SOMAXCONN, curthread); 257 } else { 258 if (bindresvport(so, 259 (struct sockaddr *)bindaddr->addr.buf)) { 260 printf( 261 "svc_tli_create: could not bind to requested address\n"); 262 goto freedata; 263 } 264 solisten(so, (int)bindaddr->qlen, curthread); 265 } 266 267 } 268 /* 269 * call transport specific function. 270 */ 271 switch (si.si_socktype) { 272 case SOCK_STREAM: 273 #if 0 274 slen = sizeof ss; 275 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 276 == 0) { 277 /* accepted socket */ 278 xprt = svc_fd_create(fd, sendsz, recvsz); 279 } else 280 #endif 281 xprt = svc_vc_create(pool, so, sendsz, recvsz); 282 if (!nconf || !xprt) 283 break; 284 #if 0 285 /* XXX fvdl */ 286 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 287 strcmp(nconf->nc_protofmly, "inet6") == 0) 288 (void) __svc_vc_setflag(xprt, TRUE); 289 #endif 290 break; 291 case SOCK_DGRAM: 292 xprt = svc_dg_create(pool, so, sendsz, recvsz); 293 break; 294 default: 295 printf("svc_tli_create: bad service type"); 296 goto freedata; 297 } 298 299 if (xprt == NULL) 300 /* 301 * The error messages here are spitted out by the lower layers: 302 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 303 */ 304 goto freedata; 305 306 /* Fill in type of service */ 307 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 308 309 if (nconf) { 310 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC); 311 } 312 return (xprt); 313 314 freedata: 315 if (madeso) 316 (void)soclose(so); 317 if (xprt) { 318 if (!madeso) /* so that svc_destroy doesnt close fd */ 319 xprt->xp_socket = NULL; 320 xprt_unregister(xprt); 321 } 322 return (NULL); 323 } 324