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Diffstat (limited to 'sbin/nfsd/nfsd.c')
-rw-r--r--sbin/nfsd/nfsd.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/sbin/nfsd/nfsd.c b/sbin/nfsd/nfsd.c
new file mode 100644
index 000000000000..63f4f005c2fb
--- /dev/null
+++ b/sbin/nfsd/nfsd.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright (c) 1989, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1989, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif not lint
+
+#ifndef lint
+static char sccsid[] = "@(#)nfsd.c 8.7 (Berkeley) 2/22/94";
+#endif not lint
+
+#include <sys/param.h>
+#include <sys/syslog.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/uio.h>
+#include <sys/ucred.h>
+#include <sys/mount.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+
+#include <rpc/rpc.h>
+#include <rpc/pmap_clnt.h>
+#include <rpc/pmap_prot.h>
+
+#ifdef ISO
+#include <netiso/iso.h>
+#endif
+#include <nfs/rpcv2.h>
+#include <nfs/nfsv2.h>
+#include <nfs/nfs.h>
+
+#ifdef KERBEROS
+#include <kerberosIV/des.h>
+#include <kerberosIV/krb.h>
+#endif
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+
+/* Global defs */
+#ifdef DEBUG
+#define syslog(e, s) fprintf(stderr,(s))
+int debug = 1;
+#else
+int debug = 0;
+#endif
+
+struct nfsd_srvargs nsd;
+char **Argv = NULL; /* pointer to argument vector */
+char *LastArg = NULL; /* end of argv */
+
+#ifdef KERBEROS
+char lnam[ANAME_SZ];
+KTEXT_ST kt;
+AUTH_DAT auth;
+char inst[INST_SZ];
+#endif
+
+void nonfs __P((int));
+void reapchild __P((int));
+void setproctitle __P((char *));
+void usage __P((void));
+
+/*
+ * Nfs server daemon mostly just a user context for nfssvc()
+ *
+ * 1 - do file descriptor and signal cleanup
+ * 2 - fork the nfsd(s)
+ * 3 - create server socket(s)
+ * 4 - register socket with portmap
+ *
+ * For connectionless protocols, just pass the socket into the kernel via.
+ * nfssvc().
+ * For connection based sockets, loop doing accepts. When you get a new
+ * socket from accept, pass the msgsock into the kernel via. nfssvc().
+ * The arguments are:
+ * -c - support iso cltp clients
+ * -r - reregister with portmapper
+ * -t - support tcp nfs clients
+ * -u - support udp nfs clients
+ * followed by "n" which is the number of nfsds' to fork off
+ */
+int
+main(argc, argv, envp)
+ int argc;
+ char *argv[], *envp[];
+{
+ extern int optind;
+ struct group *grp;
+ struct nfsd_args nfsdargs;
+ struct passwd *pwd;
+ struct ucred *cr;
+ struct sockaddr_in inetaddr, inetpeer;
+#ifdef ISO
+ struct sockaddr_iso isoaddr, isopeer;
+#endif
+ fd_set ready, sockbits;
+ int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
+ int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
+ int tp4cnt, tp4flag, tp4sock, tpipcnt, tpipflag, tpipsock, udpflag;
+ char *cp, **cpp;
+
+ /* Save start and extent of argv for setproctitle. */
+ Argv = argv;
+ if (envp == 0 || *envp == 0)
+ envp = argv;
+ while (*envp)
+ envp++;
+ LastArg = envp[-1] + strlen(envp[-1]);
+
+#define MAXNFSDCNT 20
+#define DEFNFSDCNT 4
+ nfsdcnt = DEFNFSDCNT;
+ cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
+ tpipflag = udpflag = 0;
+#ifdef ISO
+#define GETOPT "cn:rtu"
+#define USAGE "[-crtu] [-n num_servers]"
+#else
+#define GETOPT "n:rtu"
+#define USAGE "[-rtu] [-n num_servers]"
+#endif
+ while ((ch = getopt(argc, argv, GETOPT)) != EOF)
+ switch (ch) {
+ case 'n':
+ nfsdcnt = atoi(optarg);
+ if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
+ warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
+ nfsdcnt = DEFNFSDCNT;
+ }
+ break;
+ case 'r':
+ reregister = 1;
+ break;
+ case 't':
+ tcpflag = 1;
+ break;
+ case 'u':
+ udpflag = 1;
+ break;
+#ifdef ISO
+ case 'c':
+ cltpflag = 1;
+ break;
+#ifdef notyet
+ case 'i':
+ tp4cnt = 1;
+ break;
+ case 'p':
+ tpipcnt = 1;
+ break;
+#endif /* notyet */
+#endif /* ISO */
+ default:
+ case '?':
+ usage();
+ };
+ argv += optind;
+ argc -= optind;
+
+ /*
+ * XXX
+ * Backward compatibility, trailing number is the count of daemons.
+ */
+ if (argc > 1)
+ usage();
+ if (argc == 1) {
+ nfsdcnt = atoi(argv[0]);
+ if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
+ warnx("nfsd count %d; reset to %d", DEFNFSDCNT);
+ nfsdcnt = DEFNFSDCNT;
+ }
+ }
+
+ if (debug == 0) {
+ daemon(0, 0);
+ (void)signal(SIGHUP, SIG_IGN);
+ (void)signal(SIGINT, SIG_IGN);
+ (void)signal(SIGQUIT, SIG_IGN);
+ (void)signal(SIGSYS, nonfs);
+ (void)signal(SIGTERM, SIG_IGN);
+ }
+ (void)signal(SIGCHLD, reapchild);
+
+ if (reregister) {
+ if (udpflag &&
+ !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT))
+ err(1, "can't register with portmap for UDP.");
+ if (tcpflag &&
+ !pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT))
+ err(1, "can't register with portmap for TCP.");
+ exit(0);
+ }
+ openlog("nfsd:", LOG_PID, LOG_DAEMON);
+
+ for (i = 0; i < nfsdcnt; i++) {
+ switch (fork()) {
+ case -1:
+ syslog(LOG_ERR, "fork: %m");
+ exit (1);
+ case 0:
+ break;
+ default:
+ continue;
+ }
+
+ setproctitle("nfsd-srv");
+ nfssvc_flag = NFSSVC_NFSD;
+ nsd.nsd_nfsd = NULL;
+#ifdef KERBEROS
+ nsd.nsd_authstr = (char *)kt.dat;
+#endif
+ while (nfssvc(nfssvc_flag, &nsd) < 0) {
+ if (errno != ENEEDAUTH) {
+ syslog(LOG_ERR, "nfssvc: %m");
+ exit(1);
+ }
+ nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
+#ifdef KERBEROS
+ kt.length = nsd.nsd_authlen;
+ kt.mbz = 0;
+ (void)strcpy(inst, "*");
+ if (krb_rd_req(&kt, "rcmd",
+ inst, nsd.nsd_haddr, &auth, "") == RD_AP_OK &&
+ krb_kntoln(&auth, lnam) == KSUCCESS &&
+ (pwd = getpwnam(lnam)) != NULL) {
+ cr = &nsd.nsd_cr;
+ cr->cr_uid = pwd->pw_uid;
+ cr->cr_groups[0] = pwd->pw_gid;
+ cr->cr_ngroups = 1;
+ setgrent();
+ while ((grp = getgrent()) != NULL) {
+ if (grp->gr_gid == cr->cr_groups[0])
+ continue;
+ for (cpp = grp->gr_mem;
+ *cpp != NULL; ++cpp)
+ if (!strcmp(*cpp, lnam))
+ break;
+ if (*cpp == NULL)
+ continue;
+ cr->cr_groups[cr->cr_ngroups++]
+ = grp->gr_gid;
+ if (cr->cr_ngroups == NGROUPS)
+ break;
+ }
+ endgrent();
+ nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
+ }
+#endif /* KERBEROS */
+ }
+ exit(0);
+ }
+
+ /* If we are serving udp, set up the socket. */
+ if (udpflag) {
+ if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ syslog(LOG_ERR, "can't create udp socket");
+ exit(1);
+ }
+ inetaddr.sin_family = AF_INET;
+ inetaddr.sin_addr.s_addr = INADDR_ANY;
+ inetaddr.sin_port = htons(NFS_PORT);
+ inetaddr.sin_len = sizeof(inetaddr);
+ if (bind(sock,
+ (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
+ syslog(LOG_ERR, "can't bind udp addr");
+ exit(1);
+ }
+ if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
+ syslog(LOG_ERR, "can't register with udp portmap");
+ exit(1);
+ }
+ nfsdargs.sock = sock;
+ nfsdargs.name = NULL;
+ nfsdargs.namelen = 0;
+ if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
+ syslog(LOG_ERR, "can't Add UDP socket");
+ exit(1);
+ }
+ (void)close(sock);
+ }
+
+#ifdef ISO
+ /* If we are serving cltp, set up the socket. */
+ if (cltpflag) {
+ if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
+ syslog(LOG_ERR, "can't create cltp socket");
+ exit(1);
+ }
+ memset(&isoaddr, 0, sizeof(isoaddr));
+ isoaddr.siso_family = AF_ISO;
+ isoaddr.siso_tlen = 2;
+ cp = TSEL(&isoaddr);
+ *cp++ = (NFS_PORT >> 8);
+ *cp = (NFS_PORT & 0xff);
+ isoaddr.siso_len = sizeof(isoaddr);
+ if (bind(sock,
+ (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
+ syslog(LOG_ERR, "can't bind cltp addr");
+ exit(1);
+ }
+#ifdef notyet
+ /*
+ * XXX
+ * Someday this should probably use "rpcbind", the son of
+ * portmap.
+ */
+ if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
+ syslog(LOG_ERR, "can't register with udp portmap");
+ exit(1);
+ }
+#endif /* notyet */
+ nfsdargs.sock = sock;
+ nfsdargs.name = NULL;
+ nfsdargs.namelen = 0;
+ if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
+ syslog(LOG_ERR, "can't add UDP socket");
+ exit(1);
+ }
+ close(sock);
+ }
+#endif /* ISO */
+
+ /* Now set up the master server socket waiting for tcp connections. */
+ on = 1;
+ FD_ZERO(&sockbits);
+ connect_type_cnt = 0;
+ if (tcpflag) {
+ if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ syslog(LOG_ERR, "can't create tcp socket");
+ exit(1);
+ }
+ if (setsockopt(tcpsock,
+ SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
+ inetaddr.sin_family = AF_INET;
+ inetaddr.sin_addr.s_addr = INADDR_ANY;
+ inetaddr.sin_port = htons(NFS_PORT);
+ inetaddr.sin_len = sizeof(inetaddr);
+ if (bind(tcpsock,
+ (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
+ syslog(LOG_ERR, "can't bind tcp addr");
+ exit(1);
+ }
+ if (listen(tcpsock, 5) < 0) {
+ syslog(LOG_ERR, "listen failed");
+ exit(1);
+ }
+ if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
+ syslog(LOG_ERR, "can't register tcp with portmap");
+ exit(1);
+ }
+ FD_SET(tcpsock, &sockbits);
+ maxsock = tcpsock;
+ connect_type_cnt++;
+ }
+
+#ifdef notyet
+ /* Now set up the master server socket waiting for tp4 connections. */
+ if (tp4flag) {
+ if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
+ syslog(LOG_ERR, "can't create tp4 socket");
+ exit(1);
+ }
+ if (setsockopt(tp4sock,
+ SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
+ memset(&isoaddr, 0, sizeof(isoaddr));
+ isoaddr.siso_family = AF_ISO;
+ isoaddr.siso_tlen = 2;
+ cp = TSEL(&isoaddr);
+ *cp++ = (NFS_PORT >> 8);
+ *cp = (NFS_PORT & 0xff);
+ isoaddr.siso_len = sizeof(isoaddr);
+ if (bind(tp4sock,
+ (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
+ syslog(LOG_ERR, "can't bind tp4 addr");
+ exit(1);
+ }
+ if (listen(tp4sock, 5) < 0) {
+ syslog(LOG_ERR, "listen failed");
+ exit(1);
+ }
+ /*
+ * XXX
+ * Someday this should probably use "rpcbind", the son of
+ * portmap.
+ */
+ if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
+ syslog(LOG_ERR, "can't register tcp with portmap");
+ exit(1);
+ }
+ FD_SET(tp4sock, &sockbits);
+ maxsock = tp4sock;
+ connect_type_cnt++;
+ }
+
+ /* Now set up the master server socket waiting for tpip connections. */
+ if (tpipflag) {
+ if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
+ syslog(LOG_ERR, "can't create tpip socket");
+ exit(1);
+ }
+ if (setsockopt(tpipsock,
+ SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
+ inetaddr.sin_family = AF_INET;
+ inetaddr.sin_addr.s_addr = INADDR_ANY;
+ inetaddr.sin_port = htons(NFS_PORT);
+ inetaddr.sin_len = sizeof(inetaddr);
+ if (bind(tpipsock,
+ (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
+ syslog(LOG_ERR, "can't bind tcp addr");
+ exit(1);
+ }
+ if (listen(tpipsock, 5) < 0) {
+ syslog(LOG_ERR, "listen failed");
+ exit(1);
+ }
+ /*
+ * XXX
+ * Someday this should probably use "rpcbind", the son of
+ * portmap.
+ */
+ if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
+ syslog(LOG_ERR, "can't register tcp with portmap");
+ exit(1);
+ }
+ FD_SET(tpipsock, &sockbits);
+ maxsock = tpipsock;
+ connect_type_cnt++;
+ }
+#endif /* notyet */
+
+ if (connect_type_cnt == 0)
+ exit(0);
+
+ setproctitle("nfsd-master");
+
+ /*
+ * Loop forever accepting connections and passing the sockets
+ * into the kernel for the mounts.
+ */
+ for (;;) {
+ ready = sockbits;
+ if (connect_type_cnt > 1) {
+ if (select(maxsock + 1,
+ &ready, NULL, NULL, NULL) < 1) {
+ syslog(LOG_ERR, "select failed: %m");
+ exit(1);
+ }
+ }
+ if (tcpflag && FD_ISSET(tcpsock, &ready)) {
+ len = sizeof(inetpeer);
+ if ((msgsock = accept(tcpsock,
+ (struct sockaddr *)&inetpeer, &len)) < 0) {
+ syslog(LOG_ERR, "accept failed: %m");
+ exit(1);
+ }
+ memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
+ if (setsockopt(msgsock, SOL_SOCKET,
+ SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR,
+ "setsockopt SO_KEEPALIVE: %m");
+ nfsdargs.sock = msgsock;
+ nfsdargs.name = (caddr_t)&inetpeer;
+ nfsdargs.namelen = sizeof(inetpeer);
+ nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
+ (void)close(msgsock);
+ }
+#ifdef notyet
+ if (tp4flag && FD_ISSET(tp4sock, &ready)) {
+ len = sizeof(isopeer);
+ if ((msgsock = accept(tp4sock,
+ (struct sockaddr *)&isopeer, &len)) < 0) {
+ syslog(LOG_ERR, "accept failed: %m");
+ exit(1);
+ }
+ if (setsockopt(msgsock, SOL_SOCKET,
+ SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR,
+ "setsockopt SO_KEEPALIVE: %m");
+ nfsdargs.sock = msgsock;
+ nfsdargs.name = (caddr_t)&isopeer;
+ nfsdargs.namelen = len;
+ nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
+ (void)close(msgsock);
+ }
+ if (tpipflag && FD_ISSET(tpipsock, &ready)) {
+ len = sizeof(inetpeer);
+ if ((msgsock = accept(tpipsock,
+ (struct sockaddr *)&inetpeer, &len)) < 0) {
+ syslog(LOG_ERR, "Accept failed: %m");
+ exit(1);
+ }
+ if (setsockopt(msgsock, SOL_SOCKET,
+ SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
+ nfsdargs.sock = msgsock;
+ nfsdargs.name = (caddr_t)&inetpeer;
+ nfsdargs.namelen = len;
+ nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
+ (void)close(msgsock);
+ }
+#endif /* notyet */
+ }
+}
+
+void
+usage()
+{
+ (void)fprintf(stderr, "nfsd %s\n", USAGE);
+ exit(1);
+}
+
+void
+nonfs(signo)
+ int signo;
+{
+ syslog(LOG_ERR, "missing system call: NFS not available.");
+}
+
+void
+reapchild(signo)
+ int signo;
+{
+
+ while (wait3(NULL, WNOHANG, NULL));
+}
+
+void
+setproctitle(a)
+ char *a;
+{
+ register char *cp;
+ char buf[80];
+
+ cp = Argv[0];
+ (void)snprintf(buf, sizeof(buf), "%s", a);
+ (void)strncpy(cp, buf, LastArg - cp);
+ cp += strlen(cp);
+ while (cp < LastArg)
+ *cp++ = ' ';
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 05:00:43 +0000