1 /* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */ 2 /* $FreeBSD$ */ 3 4 /* 5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 6 * unrestricted use provided that this legend is included on all tape 7 * media and as a part of the software program in whole or part. Users 8 * may copy or modify Sun RPC without charge, but are not authorized 9 * to license or distribute it to anyone else except as part of a product or 10 * program developed by the user. 11 * 12 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 13 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 14 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 15 * 16 * Sun RPC is provided with no support and without any obligation on the 17 * part of Sun Microsystems, Inc. to assist in its use, correction, 18 * modification or enhancement. 19 * 20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 21 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 22 * OR ANY PART THEREOF. 23 * 24 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 25 * or profits or other special, indirect and consequential damages, even if 26 * Sun has been advised of the possibility of such damages. 27 * 28 * Sun Microsystems, Inc. 29 * 2550 Garcia Avenue 30 * Mountain View, California 94043 31 */ 32 33 /* 34 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 35 */ 36 37 /* #ident "@(#)svc_generic.c 1.19 94/04/24 SMI" */ 38 39 #if 0 40 #if !defined(lint) && defined(SCCSIDS) 41 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro"; 42 #endif 43 #endif 44 45 /* 46 * svc_generic.c, Server side for RPC. 47 * 48 */ 49 50 #include "namespace.h" 51 #include "reentrant.h" 52 #include <sys/types.h> 53 #include <sys/socket.h> 54 #include <netinet/in.h> 55 #include <rpc/rpc.h> 56 #include <rpc/nettype.h> 57 #include <stdio.h> 58 #include <errno.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <err.h> 63 #include "un-namespace.h" 64 65 #include "rpc_com.h" 66 67 extern int __svc_vc_setflag __P((SVCXPRT *, int)); 68 69 /* 70 * The highest level interface for server creation. 71 * It tries for all the nettokens in that particular class of token 72 * and returns the number of handles it can create and/or find. 73 * 74 * It creates a link list of all the handles it could create. 75 * If svc_create() is called multiple times, it uses the handle 76 * created earlier instead of creating a new handle every time. 77 */ 78 int 79 svc_create(dispatch, prognum, versnum, nettype) 80 void (*dispatch) __P((struct svc_req *, SVCXPRT *)); 81 rpcprog_t prognum; /* Program number */ 82 rpcvers_t versnum; /* Version number */ 83 const char *nettype; /* Networktype token */ 84 { 85 struct xlist { 86 SVCXPRT *xprt; /* Server handle */ 87 struct xlist *next; /* Next item */ 88 } *l; 89 static struct xlist *xprtlist; /* A link list of all the handles */ 90 int num = 0; 91 SVCXPRT *xprt; 92 struct netconfig *nconf; 93 void *handle; 94 extern mutex_t xprtlist_lock; 95 96 /* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */ 97 98 if ((handle = __rpc_setconf(nettype)) == NULL) { 99 warnx("svc_create: unknown protocol"); 100 return (0); 101 } 102 while ((nconf = __rpc_getconf(handle)) != NULL) { 103 mutex_lock(&xprtlist_lock); 104 for (l = xprtlist; l; l = l->next) { 105 if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) { 106 /* Found an old one, use it */ 107 (void) rpcb_unset(prognum, versnum, nconf); 108 if (svc_reg(l->xprt, prognum, versnum, 109 dispatch, nconf) == FALSE) 110 warnx( 111 "svc_create: could not register prog %u vers %u on %s", 112 (unsigned)prognum, (unsigned)versnum, 113 nconf->nc_netid); 114 else 115 num++; 116 break; 117 } 118 } 119 if (l == NULL) { 120 /* It was not found. Now create a new one */ 121 xprt = svc_tp_create(dispatch, prognum, versnum, nconf); 122 if (xprt) { 123 l = (struct xlist *)malloc(sizeof (*l)); 124 if (l == NULL) { 125 warnx("svc_create: no memory"); 126 mutex_unlock(&xprtlist_lock); 127 return (0); 128 } 129 l->xprt = xprt; 130 l->next = xprtlist; 131 xprtlist = l; 132 num++; 133 } 134 } 135 mutex_unlock(&xprtlist_lock); 136 } 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 SVCXPRT * 151 svc_tp_create(dispatch, prognum, versnum, nconf) 152 void (*dispatch) __P((struct svc_req *, SVCXPRT *)); 153 rpcprog_t prognum; /* Program number */ 154 rpcvers_t versnum; /* Version number */ 155 const struct netconfig *nconf; /* Netconfig structure for the network */ 156 { 157 SVCXPRT *xprt; 158 159 if (nconf == NULL) { 160 warnx( 161 "svc_tp_create: invalid netconfig structure for prog %u vers %u", 162 (unsigned)prognum, (unsigned)versnum); 163 return (NULL); 164 } 165 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 166 if (xprt == NULL) { 167 return (NULL); 168 } 169 /*LINTED const castaway*/ 170 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 171 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 172 warnx( 173 "svc_tp_create: Could not register prog %u vers %u on %s", 174 (unsigned)prognum, (unsigned)versnum, 175 nconf->nc_netid); 176 SVC_DESTROY(xprt); 177 return (NULL); 178 } 179 return (xprt); 180 } 181 182 /* 183 * If fd is RPC_ANYFD, then it opens a fd for the given transport 184 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 185 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 186 * NULL bindadr and Connection oriented transports, the value of qlen 187 * is set to 8. 188 * 189 * If sendsz or recvsz are zero, their default values are chosen. 190 */ 191 SVCXPRT * 192 svc_tli_create(fd, nconf, bindaddr, sendsz, recvsz) 193 int fd; /* Connection end point */ 194 const struct netconfig *nconf; /* Netconfig struct for nettoken */ 195 const struct t_bind *bindaddr; /* Local bind address */ 196 u_int sendsz; /* Max sendsize */ 197 u_int recvsz; /* Max recvsize */ 198 { 199 SVCXPRT *xprt = NULL; /* service handle */ 200 bool_t madefd = FALSE; /* whether fd opened here */ 201 struct __rpc_sockinfo si; 202 struct sockaddr_storage ss; 203 socklen_t slen; 204 205 if (fd == RPC_ANYFD) { 206 if (nconf == NULL) { 207 warnx("svc_tli_create: invalid netconfig"); 208 return (NULL); 209 } 210 fd = __rpc_nconf2fd(nconf); 211 if (fd == -1) { 212 warnx( 213 "svc_tli_create: could not open connection for %s", 214 nconf->nc_netid); 215 return (NULL); 216 } 217 __rpc_nconf2sockinfo(nconf, &si); 218 madefd = TRUE; 219 } else { 220 /* 221 * It is an open descriptor. Get the transport info. 222 */ 223 if (!__rpc_fd2sockinfo(fd, &si)) { 224 warnx( 225 "svc_tli_create: could not get transport information"); 226 return (NULL); 227 } 228 } 229 230 /* 231 * If the fd is unbound, try to bind it. 232 */ 233 if (madefd || !__rpc_sockisbound(fd)) { 234 if (bindaddr == NULL) { 235 if (bindresvport(fd, NULL) < 0) { 236 memset(&ss, 0, sizeof ss); 237 ss.ss_family = si.si_af; 238 ss.ss_len = si.si_alen; 239 if (_bind(fd, (struct sockaddr *)(void *)&ss, 240 (socklen_t)si.si_alen) < 0) { 241 warnx( 242 "svc_tli_create: could not bind to anonymous port"); 243 goto freedata; 244 } 245 } 246 _listen(fd, SOMAXCONN); 247 } else { 248 if (_bind(fd, 249 (struct sockaddr *)(void *)&bindaddr->addr.buf, 250 (socklen_t)si.si_alen) < 0) { 251 warnx( 252 "svc_tli_create: could not bind to requested address"); 253 goto freedata; 254 } 255 _listen(fd, (int)bindaddr->qlen); 256 } 257 258 } 259 /* 260 * call transport specific function. 261 */ 262 switch (si.si_socktype) { 263 case SOCK_STREAM: 264 slen = sizeof ss; 265 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 266 == 0) { 267 /* accepted socket */ 268 xprt = svc_fd_create(fd, sendsz, recvsz); 269 } else 270 xprt = svc_vc_create(fd, sendsz, recvsz); 271 if (!nconf || !xprt) 272 break; 273 #if 0 274 /* XXX fvdl */ 275 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 276 strcmp(nconf->nc_protofmly, "inet6") == 0) 277 (void) __svc_vc_setflag(xprt, TRUE); 278 #endif 279 break; 280 case SOCK_DGRAM: 281 xprt = svc_dg_create(fd, sendsz, recvsz); 282 break; 283 default: 284 warnx("svc_tli_create: bad service type"); 285 goto freedata; 286 } 287 288 if (xprt == NULL) 289 /* 290 * The error messages here are spitted out by the lower layers: 291 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 292 */ 293 goto freedata; 294 295 /* Fill in type of service */ 296 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 297 298 if (nconf) { 299 xprt->xp_netid = strdup(nconf->nc_netid); 300 xprt->xp_tp = strdup(nconf->nc_device); 301 } 302 return (xprt); 303 304 freedata: 305 if (madefd) 306 (void)_close(fd); 307 if (xprt) { 308 if (!madefd) /* so that svc_destroy doesnt close fd */ 309 xprt->xp_fd = RPC_ANYFD; 310 SVC_DESTROY(xprt); 311 } 312 return (NULL); 313 } 314