Give nfsd the ability to bind to specific IP addresses through the -h
option and add explicit option to bind to the wildcard address. The
default is to bind to the wildcard address when no -h option has been
specified and thus backwards compatibility is maintained.
PR: kern/13049
Reviewed by: David Malone <dwmalone@maths.tcd.ie>
Submitted by: Matt Dillon <dillon@freebsd.org>, David Malone <dwmalone@maths.tcd.ie>
This commit is contained in:
Matthew Dillon
parent
a6aa6d9137
commit
92fc2acf51
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=53096
@ -42,8 +42,9 @@
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server
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.Sh SYNOPSIS
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.Nm nfsd
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.Op Fl rut
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.Op Fl arut
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.Op Fl n Ar num_servers
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.Op Fl h Ar bindip
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.Sh DESCRIPTION
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.Nm Nfsd
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runs on a server machine to service
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@ -72,6 +73,19 @@ or
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options to re-register NFS if the portmap server is restarted.
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.It Fl n
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Specifies how many servers to create.
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.It Fl h Ar bindip
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Specifies which IP address or hostname to bind to on the local host.
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This option is recommended when a host has multiple interfaces. Multiple
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.Fl h
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options may be specified.
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.It Fl a
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Specifies that nfsd should bind to the wildcard IP address.
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This is the default if no
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.Fl h
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options are given. It may also be specified in addition to any
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.Fl h
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options given. Note that NFS/UDP does not operate properly when
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bound to the wildcard IP address whether you use -a or do not use -h.
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.It Fl t
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Serve
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.Tn TCP NFS
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@ -119,6 +133,19 @@ KLD is available,
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.Nm nfsd
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will exit with an error.
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.Pp
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If
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.Nm nfsd
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is to be run on a host with multiple interfaces or interface aliases, use
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of the
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.Fl h
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option is recommended. If you do not use the option NFS may not respond to
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UDP packets from the same IP address they were sent to. Use of this option
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is also recommended when securing NFS exports on a firewalling machine such
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that the NFS sockets can only be accessed by the inside interface.
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.Nm Ipfw
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would then be used to block nfs-related packets that come in on the outside
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interface.
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.Pp
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The
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.Nm nfsd
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utility exits 0 on success, and >0 if an error occurs.
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@ -127,7 +154,8 @@ utility exits 0 on success, and >0 if an error occurs.
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.Xr nfssvc 2 ,
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.Xr kldload 8 ,
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.Xr mountd 8 ,
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.Xr portmap 8
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.Xr portmap 8 ,
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.Xr ipfw 8
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.Sh HISTORY
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The
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.Nm nfsd
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@ -56,6 +56,8 @@ static const char rcsid[] =
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#ifdef ISO
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#include <netiso/iso.h>
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#endif
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@ -104,6 +106,7 @@ NFSKERBKEYSCHED_T kerb_keysched;
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void nonfs __P((int));
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void reapchild __P((int));
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void setbindhost __P((struct sockaddr_in *ia, const char *bindhost));
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#ifdef OLD_SETPROCTITLE
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#ifdef __FreeBSD__
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void setproctitle __P((char *));
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@ -145,6 +148,8 @@ main(argc, argv, envp)
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int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
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int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
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int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
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int bindhostc = 0, bindanyflag;
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char **bindhost = NULL;
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#ifdef notyet
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int tp4sock, tpipsock;
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#endif
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@ -184,16 +189,19 @@ main(argc, argv, envp)
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#define DEFNFSDCNT 4
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nfsdcnt = DEFNFSDCNT;
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cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
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tpipflag = udpflag = 0;
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bindanyflag = tpipflag = udpflag = 0;
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#ifdef ISO
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#define GETOPT "cn:rtu"
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#define USAGE "[-crtu] [-n num_servers]"
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#define GETOPT "ach:n:rtu"
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#define USAGE "[-acrtu] [-n num_servers] [-h bindip]"
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#else
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#define GETOPT "n:rtu"
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#define USAGE "[-rtu] [-n num_servers]"
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#define GETOPT "ah:n:rtu"
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#define USAGE "[-artu] [-n num_servers] [-h bindip]"
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#endif
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while ((ch = getopt(argc, argv, GETOPT)) != -1)
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switch (ch) {
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case 'a':
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bindanyflag = 1;
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break;
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case 'n':
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nfsdcnt = atoi(optarg);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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@ -202,6 +210,15 @@ main(argc, argv, envp)
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nfsdcnt = DEFNFSDCNT;
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}
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break;
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case 'h':
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup(optarg);
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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break;
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case 'r':
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reregister = 1;
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break;
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@ -248,6 +265,16 @@ main(argc, argv, envp)
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}
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}
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if (bindhostc == 0 || bindanyflag) {
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup("*");
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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}
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if (debug == 0) {
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daemon(0, 0);
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(void)signal(SIGHUP, SIG_IGN);
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@ -374,18 +401,15 @@ main(argc, argv, envp)
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}
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/* If we are serving udp, set up the socket. */
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if (udpflag) {
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for (i = 0; udpflag && i < bindhostc; i++) {
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if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create udp socket");
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exit(1);
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}
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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setbindhost(&inetaddr, bindhost[i]);
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if (bind(sock,
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(struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind udp addr");
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syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
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exit(1);
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}
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if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
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@ -448,7 +472,7 @@ main(argc, argv, envp)
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on = 1;
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FD_ZERO(&sockbits);
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connect_type_cnt = 0;
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if (tcpflag) {
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for (i = 0; tcpflag && i < bindhostc; i++) {
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if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create tcp socket");
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exit(1);
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@ -456,13 +480,10 @@ main(argc, argv, envp)
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if (setsockopt(tcpsock,
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SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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setbindhost(&inetaddr, bindhost[i]);
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if (bind(tcpsock,
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(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind tcp addr");
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syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
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exit(1);
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}
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if (listen(tcpsock, 5) < 0) {
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@ -520,7 +541,7 @@ main(argc, argv, envp)
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}
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/* Now set up the master server socket waiting for tpip connections. */
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if (tpipflag) {
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for (i = 0; tpipflag && i < bindhostc; i++) {
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if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
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syslog(LOG_ERR, "can't create tpip socket");
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exit(1);
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@ -528,13 +549,10 @@ main(argc, argv, envp)
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if (setsockopt(tpipsock,
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SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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setbindhost(&inetaddr, bindhost[i]);
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if (bind(tpipsock,
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(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind tcp addr");
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syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
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exit(1);
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}
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if (listen(tpipsock, 5) < 0) {
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@ -630,6 +648,28 @@ main(argc, argv, envp)
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}
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}
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void
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setbindhost(struct sockaddr_in *ia, const char *bindhost)
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{
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ia->sin_family = AF_INET;
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ia->sin_port = htons(NFS_PORT);
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ia->sin_len = sizeof(*ia);
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if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
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ia->sin_addr.s_addr = INADDR_ANY;
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} else {
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if (inet_aton(bindhost, &ia->sin_addr) == 0) {
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struct hostent *he;
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he = gethostbyname2(bindhost, ia->sin_family);
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if (he == NULL) {
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syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
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exit(1);
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}
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bcopy(he->h_addr, &ia->sin_addr, he->h_length);
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}
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}
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}
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void
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usage()
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{
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@ -42,8 +42,9 @@
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server
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.Sh SYNOPSIS
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.Nm nfsd
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.Op Fl rut
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.Op Fl arut
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.Op Fl n Ar num_servers
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.Op Fl h Ar bindip
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.Sh DESCRIPTION
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.Nm Nfsd
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runs on a server machine to service
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@ -72,6 +73,19 @@ or
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options to re-register NFS if the portmap server is restarted.
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.It Fl n
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Specifies how many servers to create.
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.It Fl h Ar bindip
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Specifies which IP address or hostname to bind to on the local host.
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This option is recommended when a host has multiple interfaces. Multiple
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.Fl h
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options may be specified.
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.It Fl a
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Specifies that nfsd should bind to the wildcard IP address.
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This is the default if no
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.Fl h
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options are given. It may also be specified in addition to any
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.Fl h
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options given. Note that NFS/UDP does not operate properly when
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bound to the wildcard IP address whether you use -a or do not use -h.
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.It Fl t
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Serve
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.Tn TCP NFS
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@ -119,6 +133,19 @@ KLD is available,
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.Nm nfsd
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will exit with an error.
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.Pp
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If
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.Nm nfsd
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is to be run on a host with multiple interfaces or interface aliases, use
|
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of the
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.Fl h
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option is recommended. If you do not use the option NFS may not respond to
|
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UDP packets from the same IP address they were sent to. Use of this option
|
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is also recommended when securing NFS exports on a firewalling machine such
|
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that the NFS sockets can only be accessed by the inside interface.
|
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.Nm Ipfw
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would then be used to block nfs-related packets that come in on the outside
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interface.
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.Pp
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The
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.Nm nfsd
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utility exits 0 on success, and >0 if an error occurs.
|
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@ -127,7 +154,8 @@ utility exits 0 on success, and >0 if an error occurs.
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.Xr nfssvc 2 ,
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.Xr kldload 8 ,
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.Xr mountd 8 ,
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.Xr portmap 8
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.Xr portmap 8 ,
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.Xr ipfw 8
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.Sh HISTORY
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The
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.Nm nfsd
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@ -56,6 +56,8 @@ static const char rcsid[] =
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#ifdef ISO
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#include <netiso/iso.h>
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#endif
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@ -104,6 +106,7 @@ NFSKERBKEYSCHED_T kerb_keysched;
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void nonfs __P((int));
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void reapchild __P((int));
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void setbindhost __P((struct sockaddr_in *ia, const char *bindhost));
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#ifdef OLD_SETPROCTITLE
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#ifdef __FreeBSD__
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void setproctitle __P((char *));
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@ -145,6 +148,8 @@ main(argc, argv, envp)
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int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
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int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
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int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
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int bindhostc = 0, bindanyflag;
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char **bindhost = NULL;
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#ifdef notyet
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int tp4sock, tpipsock;
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#endif
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@ -184,16 +189,19 @@ main(argc, argv, envp)
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#define DEFNFSDCNT 4
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nfsdcnt = DEFNFSDCNT;
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cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
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tpipflag = udpflag = 0;
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bindanyflag = tpipflag = udpflag = 0;
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#ifdef ISO
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#define GETOPT "cn:rtu"
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#define USAGE "[-crtu] [-n num_servers]"
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#define GETOPT "ach:n:rtu"
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#define USAGE "[-acrtu] [-n num_servers] [-h bindip]"
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#else
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#define GETOPT "n:rtu"
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#define USAGE "[-rtu] [-n num_servers]"
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#define GETOPT "ah:n:rtu"
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#define USAGE "[-artu] [-n num_servers] [-h bindip]"
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#endif
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while ((ch = getopt(argc, argv, GETOPT)) != -1)
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switch (ch) {
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case 'a':
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bindanyflag = 1;
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break;
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case 'n':
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nfsdcnt = atoi(optarg);
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if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
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@ -202,6 +210,15 @@ main(argc, argv, envp)
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nfsdcnt = DEFNFSDCNT;
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}
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break;
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case 'h':
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup(optarg);
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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break;
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case 'r':
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reregister = 1;
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break;
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@ -248,6 +265,16 @@ main(argc, argv, envp)
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}
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}
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if (bindhostc == 0 || bindanyflag) {
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bindhostc++;
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bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
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if (bindhost == NULL)
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errx(1, "Out of memory");
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bindhost[bindhostc-1] = strdup("*");
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if (bindhost[bindhostc-1] == NULL)
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errx(1, "Out of memory");
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}
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if (debug == 0) {
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daemon(0, 0);
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(void)signal(SIGHUP, SIG_IGN);
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@ -374,18 +401,15 @@ main(argc, argv, envp)
|
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}
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|
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/* If we are serving udp, set up the socket. */
|
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if (udpflag) {
|
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for (i = 0; udpflag && i < bindhostc; i++) {
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if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create udp socket");
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exit(1);
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}
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inetaddr.sin_family = AF_INET;
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inetaddr.sin_addr.s_addr = INADDR_ANY;
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inetaddr.sin_port = htons(NFS_PORT);
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inetaddr.sin_len = sizeof(inetaddr);
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setbindhost(&inetaddr, bindhost[i]);
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if (bind(sock,
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(struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
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syslog(LOG_ERR, "can't bind udp addr");
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syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
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exit(1);
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}
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if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
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@ -448,7 +472,7 @@ main(argc, argv, envp)
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on = 1;
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FD_ZERO(&sockbits);
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connect_type_cnt = 0;
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if (tcpflag) {
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for (i = 0; tcpflag && i < bindhostc; i++) {
|
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if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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syslog(LOG_ERR, "can't create tcp socket");
|
||||
exit(1);
|
||||
@ -456,13 +480,10 @@ main(argc, argv, envp)
|
||||
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);
|
||||
setbindhost(&inetaddr, bindhost[i]);
|
||||
if (bind(tcpsock,
|
||||
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
|
||||
syslog(LOG_ERR, "can't bind tcp addr");
|
||||
syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
|
||||
exit(1);
|
||||
}
|
||||
if (listen(tcpsock, 5) < 0) {
|
||||
@ -520,7 +541,7 @@ main(argc, argv, envp)
|
||||
}
|
||||
|
||||
/* Now set up the master server socket waiting for tpip connections. */
|
||||
if (tpipflag) {
|
||||
for (i = 0; tpipflag && i < bindhostc; i++) {
|
||||
if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
|
||||
syslog(LOG_ERR, "can't create tpip socket");
|
||||
exit(1);
|
||||
@ -528,13 +549,10 @@ main(argc, argv, envp)
|
||||
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);
|
||||
setbindhost(&inetaddr, bindhost[i]);
|
||||
if (bind(tpipsock,
|
||||
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
|
||||
syslog(LOG_ERR, "can't bind tcp addr");
|
||||
syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
|
||||
exit(1);
|
||||
}
|
||||
if (listen(tpipsock, 5) < 0) {
|
||||
@ -630,6 +648,28 @@ main(argc, argv, envp)
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
setbindhost(struct sockaddr_in *ia, const char *bindhost)
|
||||
{
|
||||
ia->sin_family = AF_INET;
|
||||
ia->sin_port = htons(NFS_PORT);
|
||||
ia->sin_len = sizeof(*ia);
|
||||
if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
|
||||
ia->sin_addr.s_addr = INADDR_ANY;
|
||||
} else {
|
||||
if (inet_aton(bindhost, &ia->sin_addr) == 0) {
|
||||
struct hostent *he;
|
||||
|
||||
he = gethostbyname2(bindhost, ia->sin_family);
|
||||
if (he == NULL) {
|
||||
syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
|
||||
exit(1);
|
||||
}
|
||||
bcopy(he->h_addr, &ia->sin_addr, he->h_length);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
usage()
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user