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-rw-r--r--sys/rpc/svc_generic.c407
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diff --git a/sys/rpc/svc_generic.c b/sys/rpc/svc_generic.c
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+/* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */
+
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part. Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California 94043
+ */
+
+/*
+ * Copyright (c) 1986-1991 by Sun Microsystems Inc.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
+static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * svc_generic.c, Server side for RPC.
+ *
+ */
+
+#include "opt_inet6.h"
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/mutex.h>
+#include <sys/protosw.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/systm.h>
+#include <sys/sx.h>
+#include <sys/ucred.h>
+
+#include <rpc/rpc.h>
+#include <rpc/rpcb_clnt.h>
+#include <rpc/nettype.h>
+
+#include "rpc_com.h"
+
+extern int __svc_vc_setflag(SVCXPRT *, int);
+
+/*
+ * 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(
+ SVCPOOL *pool,
+ void (*dispatch)(struct svc_req *, SVCXPRT *),
+ rpcprog_t prognum, /* Program number */
+ rpcvers_t versnum, /* Version number */
+ const char *nettype) /* Networktype token */
+{
+ int num = 0;
+ SVCXPRT *xprt;
+ struct netconfig *nconf;
+ void *handle;
+
+ if ((handle = __rpc_setconf(nettype)) == NULL) {
+ printf("svc_create: unknown protocol");
+ return (0);
+ }
+ while ((nconf = __rpc_getconf(handle)) != NULL) {
+ mtx_lock(&pool->sp_lock);
+ TAILQ_FOREACH(xprt, &pool->sp_xlist, xp_link) {
+ if (strcmp(xprt->xp_netid, nconf->nc_netid) == 0) {
+ /* Found an old one, use it */
+ mtx_unlock(&pool->sp_lock);
+ (void) rpcb_unset(prognum, versnum, nconf);
+ if (svc_reg(xprt, prognum, versnum,
+ dispatch, nconf) == FALSE) {
+ printf(
+ "svc_create: could not register prog %u vers %u on %s\n",
+ (unsigned)prognum, (unsigned)versnum,
+ nconf->nc_netid);
+ mtx_lock(&pool->sp_lock);
+ } else {
+ num++;
+ mtx_lock(&pool->sp_lock);
+ break;
+ }
+ }
+ }
+ mtx_unlock(&pool->sp_lock);
+ if (xprt == NULL) {
+ /* It was not found. Now create a new one */
+ xprt = svc_tp_create(pool, dispatch, prognum, versnum,
+ NULL, nconf);
+ if (xprt)
+ num++;
+ }
+ }
+ __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(
+ SVCPOOL *pool,
+ void (*dispatch)(struct svc_req *, SVCXPRT *),
+ rpcprog_t prognum, /* Program number */
+ rpcvers_t versnum, /* Version number */
+ const char *uaddr, /* Address (or null for default) */
+ const struct netconfig *nconf) /* Netconfig structure for the network */
+{
+ struct netconfig nconfcopy;
+ struct netbuf *taddr;
+ struct t_bind bind;
+ SVCXPRT *xprt;
+
+ if (nconf == NULL) {
+ printf(
+ "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
+ (unsigned)prognum, (unsigned)versnum);
+ return (NULL);
+ }
+ if (uaddr) {
+ taddr = uaddr2taddr(nconf, uaddr);
+ bind.addr = *taddr;
+ free(taddr, M_RPC);
+ bind.qlen = SOMAXCONN;
+ xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
+ free(bind.addr.buf, M_RPC);
+ } else {
+ xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
+ }
+ if (xprt == NULL) {
+ return (NULL);
+ }
+ /*LINTED const castaway*/
+ nconfcopy = *nconf;
+ (void) rpcb_unset(prognum, versnum, &nconfcopy);
+ if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
+ printf(
+ "svc_tp_create: Could not register prog %u vers %u on %s\n",
+ (unsigned)prognum, (unsigned)versnum,
+ nconf->nc_netid);
+ SVC_DESTROY(xprt);
+ return (NULL);
+ }
+ return (xprt);
+}
+
+/*
+ * Bind a socket to a privileged IP port
+ */
+int bindresvport(struct socket *so, struct sockaddr *sa);
+int
+bindresvport(struct socket *so, struct sockaddr *sa)
+{
+ int old, error, af;
+ bool_t freesa = FALSE;
+ struct sockaddr_in *sin;
+#ifdef INET6
+ struct sockaddr_in6 *sin6;
+#endif
+ struct sockopt opt;
+ int proto, portrange, portlow;
+ u_int16_t *portp;
+ socklen_t salen;
+
+ if (sa == NULL) {
+ error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
+ if (error)
+ return (error);
+ freesa = TRUE;
+ af = sa->sa_family;
+ salen = sa->sa_len;
+ memset(sa, 0, sa->sa_len);
+ } else {
+ af = sa->sa_family;
+ salen = sa->sa_len;
+ }
+
+ switch (af) {
+ case AF_INET:
+ proto = IPPROTO_IP;
+ portrange = IP_PORTRANGE;
+ portlow = IP_PORTRANGE_LOW;
+ sin = (struct sockaddr_in *)sa;
+ portp = &sin->sin_port;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ proto = IPPROTO_IPV6;
+ portrange = IPV6_PORTRANGE;
+ portlow = IPV6_PORTRANGE_LOW;
+ sin6 = (struct sockaddr_in6 *)sa;
+ portp = &sin6->sin6_port;
+ break;
+#endif
+ default:
+ return (EPFNOSUPPORT);
+ }
+
+ sa->sa_family = af;
+ sa->sa_len = salen;
+
+ if (*portp == 0) {
+ bzero(&opt, sizeof(opt));
+ opt.sopt_dir = SOPT_GET;
+ opt.sopt_level = proto;
+ opt.sopt_name = portrange;
+ opt.sopt_val = &old;
+ opt.sopt_valsize = sizeof(old);
+ error = sogetopt(so, &opt);
+ if (error)
+ goto out;
+
+ opt.sopt_dir = SOPT_SET;
+ opt.sopt_val = &portlow;
+ error = sosetopt(so, &opt);
+ if (error)
+ goto out;
+ }
+
+ error = sobind(so, sa, curthread);
+
+ if (*portp == 0) {
+ if (error) {
+ opt.sopt_dir = SOPT_SET;
+ opt.sopt_val = &old;
+ sosetopt(so, &opt);
+ }
+ }
+out:
+ if (freesa)
+ free(sa, M_SONAME);
+
+ return (error);
+}
+
+/*
+ * If so is NULL, then it opens a socket 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(
+ SVCPOOL *pool,
+ struct socket *so, /* Connection end point */
+ const struct netconfig *nconf, /* Netconfig struct for nettoken */
+ const struct t_bind *bindaddr, /* Local bind address */
+ size_t sendsz, /* Max sendsize */
+ size_t recvsz) /* Max recvsize */
+{
+ SVCXPRT *xprt = NULL; /* service handle */
+ bool_t madeso = FALSE; /* whether so opened here */
+ struct __rpc_sockinfo si;
+ struct sockaddr_storage ss;
+
+ if (!so) {
+ if (nconf == NULL) {
+ printf("svc_tli_create: invalid netconfig\n");
+ return (NULL);
+ }
+ so = __rpc_nconf2socket(nconf);
+ if (!so) {
+ printf(
+ "svc_tli_create: could not open connection for %s\n",
+ nconf->nc_netid);
+ return (NULL);
+ }
+ __rpc_nconf2sockinfo(nconf, &si);
+ madeso = TRUE;
+ } else {
+ /*
+ * It is an open socket. Get the transport info.
+ */
+ if (!__rpc_socket2sockinfo(so, &si)) {
+ printf(
+ "svc_tli_create: could not get transport information\n");
+ return (NULL);
+ }
+ }
+
+ /*
+ * If the socket is unbound, try to bind it.
+ */
+ if (madeso || !__rpc_sockisbound(so)) {
+ if (bindaddr == NULL) {
+ if (bindresvport(so, NULL)) {
+ memset(&ss, 0, sizeof ss);
+ ss.ss_family = si.si_af;
+ ss.ss_len = si.si_alen;
+ if (sobind(so, (struct sockaddr *)&ss,
+ curthread)) {
+ printf(
+ "svc_tli_create: could not bind to anonymous port\n");
+ goto freedata;
+ }
+ }
+ solisten(so, SOMAXCONN, curthread);
+ } else {
+ if (bindresvport(so,
+ (struct sockaddr *)bindaddr->addr.buf)) {
+ printf(
+ "svc_tli_create: could not bind to requested address\n");
+ goto freedata;
+ }
+ solisten(so, (int)bindaddr->qlen, curthread);
+ }
+
+ }
+ /*
+ * call transport specific function.
+ */
+ switch (si.si_socktype) {
+ case SOCK_STREAM:
+#if 0
+ slen = sizeof ss;
+ if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
+ == 0) {
+ /* accepted socket */
+ xprt = svc_fd_create(fd, sendsz, recvsz);
+ } else
+#endif
+ xprt = svc_vc_create(pool, so, 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(pool, so, sendsz, recvsz);
+ break;
+ default:
+ printf("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) {
+ xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
+ }
+ return (xprt);
+
+freedata:
+ if (madeso)
+ (void)soclose(so);
+ if (xprt) {
+ if (!madeso) /* so that svc_destroy doesnt close fd */
+ xprt->xp_socket = NULL;
+ SVC_DESTROY(xprt);
+ }
+ return (NULL);
+}
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