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+
+/*
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of Sun Microsystems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1986-1991 by Sun Microsystems Inc.
+ */
+
+/*
+ * svc_generic.c, Server side for RPC.
+ *
+ */
+#include <pthread.h>
+#include <reentrant.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <rpc/rpc.h>
+#include <rpc/nettype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <err.h>
+
+#include "rpc_com.h"
+#include <rpc/svc.h>
+
+extern int __svc_vc_setflag(SVCXPRT *, int);
+extern int __binddynport(int fd);
+
+/*
+ * The highest level interface for server creation.
+ * It tries for all the nettokens in that particular class of token
+ * and returns the number of handles it can create and/or find.
+ *
+ * It creates a link list of all the handles it could create.
+ * If svc_create() is called multiple times, it uses the handle
+ * created earlier instead of creating a new handle every time.
+ */
+int
+svc_create(dispatch, prognum, versnum, nettype)
+ void (*dispatch)(struct svc_req *, SVCXPRT *);
+ rpcprog_t prognum; /* Program number */
+ rpcvers_t versnum; /* Version number */
+ const char *nettype; /* Networktype token */
+{
+ struct xlist {
+ SVCXPRT *xprt; /* Server handle */
+ struct xlist *next; /* Next item */
+ } *l;
+ static struct xlist *xprtlist; /* A link list of all the handles */
+ int num = 0;
+ SVCXPRT *xprt;
+ struct netconfig *nconf;
+ void *handle;
+ extern mutex_t xprtlist_lock;
+
+/* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */
+
+ if ((handle = __rpc_setconf(nettype)) == NULL) {
+ warnx("svc_create: unknown protocol");
+ return (0);
+ }
+ while ((nconf = __rpc_getconf(handle)) != NULL) {
+ mutex_lock(&xprtlist_lock);
+ for (l = xprtlist; l; l = l->next) {
+ if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) {
+ /* Found an old one, use it */
+ (void) rpcb_unset(prognum, versnum, nconf);
+ if (svc_reg(l->xprt, prognum, versnum,
+ dispatch, nconf) == FALSE)
+ warnx(
+ "svc_create: could not register prog %u vers %u on %s",
+ (unsigned)prognum, (unsigned)versnum,
+ nconf->nc_netid);
+ else
+ num++;
+ break;
+ }
+ }
+ if (l == NULL) {
+ /* It was not found. Now create a new one */
+ xprt = svc_tp_create(dispatch, prognum, versnum, nconf);
+ if (xprt) {
+ l = (struct xlist *)malloc(sizeof (*l));
+ if (l == NULL) {
+ warnx("svc_create: no memory");
+ mutex_unlock(&xprtlist_lock);
+ __rpc_endconf(handle);
+ return (0);
+ }
+ l->xprt = xprt;
+ l->next = xprtlist;
+ xprtlist = l;
+ num++;
+ }
+ }
+ mutex_unlock(&xprtlist_lock);
+ }
+ __rpc_endconf(handle);
+ /*
+ * In case of num == 0; the error messages are generated by the
+ * underlying layers; and hence not needed here.
+ */
+ return (num);
+}
+
+/*
+ * The high level interface to svc_tli_create().
+ * It tries to create a server for "nconf" and registers the service
+ * with the rpcbind. It calls svc_tli_create();
+ */
+SVCXPRT *
+svc_tp_create(dispatch, prognum, versnum, nconf)
+ void (*dispatch)(struct svc_req *, SVCXPRT *);
+ rpcprog_t prognum; /* Program number */
+ rpcvers_t versnum; /* Version number */
+ const struct netconfig *nconf; /* Netconfig structure for the network */
+{
+ SVCXPRT *xprt;
+
+ if (nconf == NULL) {
+ warnx(
+ "svc_tp_create: invalid netconfig structure for prog %u vers %u",
+ (unsigned)prognum, (unsigned)versnum);
+ return (NULL);
+ }
+ xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
+ if (xprt == NULL) {
+ return (NULL);
+ }
+ /*LINTED const castaway*/
+ (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
+ if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
+ warnx(
+ "svc_tp_create: Could not register prog %u vers %u on %s",
+ (unsigned)prognum, (unsigned)versnum,
+ nconf->nc_netid);
+ SVC_DESTROY(xprt);
+ return (NULL);
+ }
+ return (xprt);
+}
+
+ /*
+ * If fd is RPC_ANYFD, then it opens a fd for the given transport
+ * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
+ * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
+ * NULL bindadr and Connection oriented transports, the value of qlen
+ * is set to 8.
+ *
+ * If sendsz or recvsz are zero, their default values are chosen.
+ */
+SVCXPRT *
+svc_tli_create(fd, nconf, bindaddr, sendsz, recvsz)
+ int fd; /* Connection end point */
+ const struct netconfig *nconf; /* Netconfig struct for nettoken */
+ const struct t_bind *bindaddr; /* Local bind address */
+ u_int sendsz; /* Max sendsize */
+ u_int recvsz; /* Max recvsize */
+{
+ SVCXPRT *xprt = NULL; /* service handle */
+ bool_t madefd = FALSE; /* whether fd opened here */
+ struct __rpc_sockinfo si;
+ struct sockaddr_storage ss;
+ socklen_t slen;
+
+ if (fd == RPC_ANYFD) {
+ if (nconf == NULL) {
+ warnx("svc_tli_create: invalid netconfig");
+ return (NULL);
+ }
+ fd = __rpc_nconf2fd(nconf);
+ if (fd == -1) {
+ warnx(
+ "svc_tli_create: could not open connection for %s",
+ nconf->nc_netid);
+ return (NULL);
+ }
+ __rpc_nconf2sockinfo(nconf, &si);
+ madefd = TRUE;
+ } else {
+ /*
+ * It is an open descriptor. Get the transport info.
+ */
+ if (!__rpc_fd2sockinfo(fd, &si)) {
+ warnx(
+ "svc_tli_create: could not get transport information");
+ return (NULL);
+ }
+ }
+
+ /*
+ * If the fd is unbound, try to bind it.
+ */
+ if (madefd || !__rpc_sockisbound(fd)) {
+ if (bindaddr == NULL) {
+ if (__binddynport(fd) == -1) {
+ warnx(
+ "svc_tli_create: could not bind to anonymous port");
+ goto freedata;
+ }
+ listen(fd, SOMAXCONN);
+ } else {
+ if (bind(fd,
+ (struct sockaddr *)bindaddr->addr.buf,
+ (socklen_t)si.si_alen) < 0) {
+ warnx(
+ "svc_tli_create: could not bind to requested address");
+ goto freedata;
+ }
+ listen(fd, (int)bindaddr->qlen);
+ }
+
+ }
+ /*
+ * call transport specific function.
+ */
+ switch (si.si_socktype) {
+ case SOCK_STREAM:
+ slen = sizeof ss;
+ if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
+ == 0) {
+ /* accepted socket */
+ xprt = svc_fd_create(fd, sendsz, recvsz);
+ } else
+ xprt = svc_vc_create(fd, sendsz, recvsz);
+ if (!nconf || !xprt)
+ break;
+#if 0
+ /* XXX fvdl */
+ if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
+ strcmp(nconf->nc_protofmly, "inet6") == 0)
+ (void) __svc_vc_setflag(xprt, TRUE);
+#endif
+ break;
+ case SOCK_DGRAM:
+ xprt = svc_dg_create(fd, sendsz, recvsz);
+ break;
+ default:
+ warnx("svc_tli_create: bad service type");
+ goto freedata;
+ }
+
+ if (xprt == NULL)
+ /*
+ * The error messages here are spitted out by the lower layers:
+ * svc_vc_create(), svc_fd_create() and svc_dg_create().
+ */
+ goto freedata;
+
+ /* Fill in type of service */
+ xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
+
+ if (nconf) {
+ if (xprt->xp_netid != NULL)
+ free(xprt->xp_netid);
+ xprt->xp_netid = strdup(nconf->nc_netid);
+ xprt->xp_tp = strdup(nconf->nc_device);
+ }
+ return (xprt);
+
+freedata:
+ if (madefd)
+ (void)close(fd);
+ if (xprt) {
+ if (!madefd) /* so that svc_destroy doesnt close fd */
+ xprt->xp_fd = RPC_ANYFD;
+ SVC_DESTROY(xprt);
+ }
+ return (NULL);
+}
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