1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)svc_generic.c 1.19 94/04/24 SMI; 1.21 89/02/28 Copyr 1988 Sun Micro 30 * $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ 31 * $FreeBSD: src/lib/libc/rpc/svc_generic.c,v 1.7 2006/02/27 22:10:59 deischen Exp $ 32 */ 33 34 /* 35 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 36 */ 37 38 /* 39 * svc_generic.c, Server side for RPC. 40 */ 41 42 #include "namespace.h" 43 #include "reentrant.h" 44 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <netinet/in.h> 47 #include <rpc/rpc.h> 48 #include <rpc/nettype.h> 49 #include <stdio.h> 50 #include <errno.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <err.h> 55 #include "un-namespace.h" 56 57 #include "rpc_com.h" 58 #include "mt_misc.h" 59 60 extern int __svc_vc_setflag(SVCXPRT *, int); 61 62 /* 63 * The highest level interface for server creation. 64 * It tries for all the nettokens in that particular class of token 65 * and returns the number of handles it can create and/or find. 66 * 67 * It creates a link list of all the handles it could create. 68 * If svc_create() is called multiple times, it uses the handle 69 * created earlier instead of creating a new handle every time. 70 */ 71 int 72 svc_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 73 rpcprog_t prognum, /* Program number */ 74 rpcvers_t versnum, /* Version number */ 75 const char *nettype) /* Networktype token */ 76 { 77 struct xlist { 78 SVCXPRT *xprt; /* Server handle */ 79 struct xlist *next; /* Next item */ 80 } *l; 81 static struct xlist *xprtlist; /* A link list of all the handles */ 82 int num = 0; 83 SVCXPRT *xprt; 84 struct netconfig *nconf; 85 void *handle; 86 87 /* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */ 88 89 if ((handle = __rpc_setconf(nettype)) == NULL) { 90 warnx("svc_create: unknown protocol"); 91 return (0); 92 } 93 while ((nconf = __rpc_getconf(handle)) != NULL) { 94 mutex_lock(&xprtlist_lock); 95 for (l = xprtlist; l; l = l->next) { 96 if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) { 97 /* Found an old one, use it */ 98 rpcb_unset(prognum, versnum, nconf); 99 if (svc_reg(l->xprt, prognum, versnum, 100 dispatch, nconf) == FALSE) 101 warnx( 102 "svc_create: could not register prog %u vers %u on %s", 103 (unsigned)prognum, (unsigned)versnum, 104 nconf->nc_netid); 105 else 106 num++; 107 break; 108 } 109 } 110 if (l == NULL) { 111 /* It was not found. Now create a new one */ 112 xprt = svc_tp_create(dispatch, prognum, versnum, nconf); 113 if (xprt) { 114 l = (struct xlist *)malloc(sizeof (*l)); 115 if (l == NULL) { 116 warnx("svc_create: no memory"); 117 mutex_unlock(&xprtlist_lock); 118 return (0); 119 } 120 l->xprt = xprt; 121 l->next = xprtlist; 122 xprtlist = l; 123 num++; 124 } 125 } 126 mutex_unlock(&xprtlist_lock); 127 } 128 __rpc_endconf(handle); 129 /* 130 * In case of num == 0; the error messages are generated by the 131 * underlying layers; and hence not needed here. 132 */ 133 return (num); 134 } 135 136 /* 137 * The high level interface to svc_tli_create(). 138 * It tries to create a server for "nconf" and registers the service 139 * with the rpcbind. It calls svc_tli_create(); 140 */ 141 SVCXPRT * 142 svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *), 143 rpcprog_t prognum, /* Program number */ 144 rpcvers_t versnum, /* Version number */ 145 const struct netconfig *nconf) /* Netconfig structure for the network */ 146 { 147 SVCXPRT *xprt; 148 149 if (nconf == NULL) { 150 warnx( 151 "svc_tp_create: invalid netconfig structure for prog %u vers %u", 152 (unsigned)prognum, (unsigned)versnum); 153 return (NULL); 154 } 155 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 156 if (xprt == NULL) { 157 return (NULL); 158 } 159 /*LINTED const castaway*/ 160 rpcb_unset(prognum, versnum, (struct netconfig *) nconf); 161 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) { 162 warnx( 163 "svc_tp_create: Could not register prog %u vers %u on %s", 164 (unsigned)prognum, (unsigned)versnum, 165 nconf->nc_netid); 166 SVC_DESTROY(xprt); 167 return (NULL); 168 } 169 return (xprt); 170 } 171 172 /* 173 * If fd is RPC_ANYFD, then it opens a fd for the given transport 174 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and 175 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For 176 * NULL bindadr and Connection oriented transports, the value of qlen 177 * is set to 8. 178 * 179 * If sendsz or recvsz are zero, their default values are chosen. 180 */ 181 SVCXPRT * 182 svc_tli_create( 183 int fd, /* Connection end point */ 184 const struct netconfig *nconf, /* Netconfig struct for nettoken */ 185 const struct t_bind *bindaddr, /* Local bind address */ 186 u_int sendsz, /* Max sendsize */ 187 u_int recvsz) /* Max recvsize */ 188 { 189 SVCXPRT *xprt = NULL; /* service handle */ 190 bool_t madefd = FALSE; /* whether fd opened here */ 191 struct __rpc_sockinfo si; 192 struct sockaddr_storage ss; 193 socklen_t slen; 194 195 if (fd == RPC_ANYFD) { 196 if (nconf == NULL) { 197 warnx("svc_tli_create: invalid netconfig"); 198 return (NULL); 199 } 200 fd = __rpc_nconf2fd(nconf); 201 if (fd == -1) { 202 warnx( 203 "svc_tli_create: could not open connection for %s", 204 nconf->nc_netid); 205 return (NULL); 206 } 207 __rpc_nconf2sockinfo(nconf, &si); 208 madefd = TRUE; 209 } else { 210 /* 211 * It is an open descriptor. Get the transport info. 212 */ 213 if (!__rpc_fd2sockinfo(fd, &si)) { 214 warnx( 215 "svc_tli_create: could not get transport information"); 216 return (NULL); 217 } 218 } 219 220 /* 221 * If the fd is unbound, try to bind it. 222 */ 223 if (madefd || !__rpc_sockisbound(fd)) { 224 if (bindaddr == NULL) { 225 if (bindresvport(fd, NULL) < 0) { 226 memset(&ss, 0, sizeof ss); 227 ss.ss_family = si.si_af; 228 ss.ss_len = si.si_alen; 229 if (_bind(fd, (struct sockaddr *)(void *)&ss, 230 (socklen_t)si.si_alen) < 0) { 231 warnx( 232 "svc_tli_create: could not bind to anonymous port"); 233 goto freedata; 234 } 235 } 236 _listen(fd, SOMAXCONN); 237 } else { 238 if (_bind(fd, 239 (struct sockaddr *)bindaddr->addr.buf, 240 (socklen_t)si.si_alen) < 0) { 241 warnx( 242 "svc_tli_create: could not bind to requested address"); 243 goto freedata; 244 } 245 _listen(fd, (int)bindaddr->qlen); 246 } 247 248 } 249 /* 250 * call transport specific function. 251 */ 252 switch (si.si_socktype) { 253 case SOCK_STREAM: 254 slen = sizeof ss; 255 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) 256 == 0) { 257 /* accepted socket */ 258 xprt = svc_fd_create(fd, sendsz, recvsz); 259 } else 260 xprt = svc_vc_create(fd, sendsz, recvsz); 261 if (!nconf || !xprt) 262 break; 263 #if 0 264 /* XXX fvdl */ 265 if (strcmp(nconf->nc_protofmly, "inet") == 0 || 266 strcmp(nconf->nc_protofmly, "inet6") == 0) 267 (void) __svc_vc_setflag(xprt, TRUE); 268 #endif 269 break; 270 case SOCK_DGRAM: 271 xprt = svc_dg_create(fd, sendsz, recvsz); 272 break; 273 default: 274 warnx("svc_tli_create: bad service type"); 275 goto freedata; 276 } 277 278 if (xprt == NULL) 279 /* 280 * The error messages here are spitted out by the lower layers: 281 * svc_vc_create(), svc_fd_create() and svc_dg_create(). 282 */ 283 goto freedata; 284 285 /* Fill in type of service */ 286 xprt->xp_type = __rpc_socktype2seman(si.si_socktype); 287 288 if (nconf) { 289 xprt->xp_netid = strdup(nconf->nc_netid); 290 xprt->xp_tp = strdup(nconf->nc_device); 291 } 292 return (xprt); 293 294 freedata: 295 if (madefd) 296 _close(fd); 297 if (xprt) { 298 if (!madefd) /* so that svc_destroy doesnt close fd */ 299 xprt->xp_fd = RPC_ANYFD; 300 SVC_DESTROY(xprt); 301 } 302 return (NULL); 303 } 304