2 * Copyright (c) 1997-2004 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgment:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * $Id: transp_sockets.c,v 1.6.2.11 2004/01/06 03:15:20 ezk Exp $
43 * Socket specific utilities.
44 * -Erez Zadok <ezk@cs.columbia.edu>
49 #endif /* HAVE_CONFIG_H */
55 * find the IP address that can be used to connect to the local host
58 amu_get_myaddress(struct in_addr *iap)
60 struct sockaddr_in sin;
62 memset((char *) &sin, 0, sizeof(sin));
64 iap->s_addr = sin.sin_addr.s_addr;
69 * How to bind to reserved ports.
72 bind_resv_port(int so, u_short *pp)
74 struct sockaddr_in sin;
78 memset((voidp) &sin, 0, sizeof(sin));
79 sin.sin_family = AF_INET;
81 port = IPPORT_RESERVED;
85 sin.sin_port = htons(port);
86 rc = bind(so, (struct sockaddr *) &sin, sizeof(sin));
87 } while (rc < 0 && (int) port > IPPORT_RESERVED / 2);
97 * close a descriptor, Sockets style
107 * Create an rpc client attached to the mount daemon.
110 get_mount_client(char *unused_host, struct sockaddr_in *sin, struct timeval *tv, int *sock, u_long mnt_version)
115 * First try a TCP socket
117 if ((*sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) > 0) {
119 * Bind to a privileged port
121 if (bind_resv_port(*sock, (u_short *) 0) < 0)
122 plog(XLOG_ERROR, "can't bind privileged port (socket)");
125 * Find mountd port to connect to.
127 * Create a tcp client.
129 if ((sin->sin_port = htons(pmap_getport(sin, MOUNTPROG, mnt_version, IPPROTO_TCP))) != 0) {
130 if (connect(*sock, (struct sockaddr *) sin, sizeof(*sin)) >= 0
131 && ((client = clnttcp_create(sin, MOUNTPROG, mnt_version, sock, 0, 0)) != NULL))
135 * Failed so close socket
138 } /* tcp socket opened */
139 /* TCP failed so try UDP */
140 if ((*sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
141 plog(XLOG_ERROR, "Can't create socket to connect to mountd: %m");
146 * Bind to a privileged port
148 if (bind_resv_port(*sock, (u_short *) 0) < 0)
149 plog(XLOG_ERROR, "can't bind privileged port");
152 * Zero out the port - make sure we recompute
159 if ((client = clntudp_create(sin, MOUNTPROG, mnt_version, *tv, sock)) == NULL) {
165 dlog("get_mount_client: Using udp, port %d", sin->sin_port);
172 * find the address of the caller of an RPC procedure.
175 amu_svc_getcaller(SVCXPRT *xprt)
177 /* glibc 2.2 returns a sockaddr_storage ??? */
178 return (struct sockaddr_in *)svc_getcaller(xprt);
183 * Create the nfs service for amd
186 create_nfs_service(int *soNFSp, u_short *nfs_portp, SVCXPRT **nfs_xprtp, void (*dispatch_fxn)(struct svc_req *rqstp, SVCXPRT *transp))
189 *soNFSp = socket(AF_INET, SOCK_DGRAM, 0);
191 if (*soNFSp < 0 || bind_resv_port(*soNFSp, NULL) < 0) {
192 plog(XLOG_FATAL, "Can't create privileged nfs port (socket)");
195 if ((*nfs_xprtp = svcudp_create(*soNFSp)) == NULL) {
196 plog(XLOG_FATAL, "cannot create rpc/udp service");
199 if ((*nfs_portp = (*nfs_xprtp)->xp_port) >= IPPORT_RESERVED) {
200 plog(XLOG_FATAL, "Can't create privileged nfs port");
203 if (!svc_register(*nfs_xprtp, NFS_PROGRAM, NFS_VERSION, dispatch_fxn, 0)) {
204 plog(XLOG_FATAL, "unable to register (%ld, %ld, 0)",
205 (u_long) NFS_PROGRAM, (u_long) NFS_VERSION);
209 return 0; /* all is well */
214 * Create the amq service for amd (both TCP and UDP)
217 create_amq_service(int *udp_soAMQp, SVCXPRT **udp_amqpp, int *tcp_soAMQp, SVCXPRT **tcp_amqpp)
219 /* first create TCP service */
221 *tcp_soAMQp = socket(AF_INET, SOCK_STREAM, 0);
222 if (*tcp_soAMQp < 0) {
223 plog(XLOG_FATAL, "cannot create tcp socket for amq service: %m");
227 /* now create RPC service handle for amq */
229 (*tcp_amqpp = svctcp_create(*tcp_soAMQp, AMQ_SIZE, AMQ_SIZE)) == NULL) {
230 plog(XLOG_FATAL, "cannot create tcp service for amq: soAMQp=%d", *tcp_soAMQp);
234 #ifdef SVCSET_CONNMAXREC
236 * This is *BSD at its best.
237 * They just had to do things differently than everyone else
238 * so they fixed a library DoS issue by forcing client-side changes...
240 # ifndef RPC_MAXDATASIZE
241 # define RPC_MAXDATASIZE 9000
242 # endif /* not RPC_MAXDATASIZE */
244 int maxrec = RPC_MAXDATASIZE;
245 SVC_CONTROL(*tcp_amqpp, SVCSET_CONNMAXREC, &maxrec);
247 #endif /* not SVCSET_CONNMAXREC */
250 /* next create UDP service */
252 *udp_soAMQp = socket(AF_INET, SOCK_DGRAM, 0);
253 if (*udp_soAMQp < 0) {
254 plog(XLOG_FATAL, "cannot create udp socket for amq service: %m");
258 /* now create RPC service handle for amq */
260 (*udp_amqpp = svcudp_bufcreate(*udp_soAMQp, AMQ_SIZE, AMQ_SIZE)) == NULL) {
261 plog(XLOG_FATAL, "cannot create udp service for amq: soAMQp=%d", *udp_soAMQp);
266 return 0; /* all is well */
271 * Ping the portmapper on a remote system by calling the nullproc
274 pmap_ping(struct sockaddr_in *address)
277 enum clnt_stat clnt_stat = RPC_TIMEDOUT; /* assume failure */
278 int socket = RPC_ANYSOCK;
279 struct timeval timeout;
283 address->sin_port = htons(PMAPPORT);
284 client = clntudp_create(address, PMAPPROG, PMAPVERS, timeout, &socket);
285 if (client != (CLIENT *) NULL) {
286 clnt_stat = clnt_call(client,
288 (XDRPROC_T_TYPE) xdr_void,
290 (XDRPROC_T_TYPE) xdr_void,
293 clnt_destroy(client);
296 address->sin_port = 0;
303 * Find the best NFS version for a host and protocol.
306 get_nfs_version(char *host, struct sockaddr_in *sin, u_long nfs_version, const char *proto)
310 enum clnt_stat clnt_stat;
315 * If not set or set wrong, then try from NFS_VERS_MAX on down. If
316 * set, then try from nfs_version on down.
318 if (nfs_version <= 0 || nfs_version > NFS_VERS_MAX) {
319 nfs_version = NFS_VERS_MAX;
322 tv.tv_sec = 3; /* retry every 3 seconds, but also timeout */
326 * First check if remote portmapper is up (verify if remote host is up).
328 clnt_stat = pmap_ping(sin);
329 if (clnt_stat == RPC_TIMEDOUT) {
330 plog(XLOG_ERROR, "get_nfs_version: failed to contact portmapper on host \"%s\": %s", host, clnt_sperrno(clnt_stat));
336 #endif /* HAVE_FS_NFS3 */
339 if (STREQ(proto, "tcp"))
340 clnt = clnttcp_create(sin, NFS_PROGRAM, nfs_version, &sock, 0, 0);
341 else if (STREQ(proto, "udp"))
342 clnt = clntudp_create(sin, NFS_PROGRAM, nfs_version, tv, &sock);
347 #ifdef HAVE_CLNT_SPCREATEERROR
348 plog(XLOG_INFO, "get_nfs_version NFS(%d,%s) failed for %s: %s",
349 (int) nfs_version, proto, host, clnt_spcreateerror(""));
350 #else /* not HAVE_CLNT_SPCREATEERROR */
351 plog(XLOG_INFO, "get_nfs_version NFS(%d,%s) failed for %s",
352 (int) nfs_version, proto, host);
353 #endif /* not HAVE_CLNT_SPCREATEERROR */
357 /* Try a couple times to verify the CLIENT handle. */
359 clnt_stat = clnt_call(clnt,
361 (XDRPROC_T_TYPE) xdr_void,
363 (XDRPROC_T_TYPE) xdr_void,
368 if (clnt_stat != RPC_SUCCESS) {
371 if (nfs_version == NFS_VERSION3) {
372 plog(XLOG_INFO, "get_nfs_version trying a lower version");
373 nfs_version = NFS_VERSION;
377 #endif /* HAVE_FS_NFS3 */
379 plog(XLOG_INFO, "get_nfs_version NFS(%d,%s) failed for %s",
380 (int) nfs_version, proto, host);
384 plog(XLOG_INFO, "get_nfs_version: returning (%d,%s) on host %s",
385 (int) nfs_version, proto, host);