3c49a19fc9
The "len" variable is used as the last argument to getsockname(2) and accept(2). It was declared an "int" and this patch changes it to "socklen_t".
375 lines
9.1 KiB
C
375 lines
9.1 KiB
C
/*-
|
|
* Copyright (c) 2009 Rick Macklem, University of Guelph
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/ucred.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <nfs/nfssvc.h>
|
|
|
|
#include <rpc/rpc.h>
|
|
|
|
#include <fs/nfs/rpcv2.h>
|
|
#include <fs/nfs/nfsproto.h>
|
|
#include <fs/nfs/nfskpiport.h>
|
|
#include <fs/nfs/nfs.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <grp.h>
|
|
#include <netdb.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
|
|
/* Global defs */
|
|
#ifdef DEBUG
|
|
#define syslog(e, s) fprintf(stderr,(s))
|
|
static int debug = 1;
|
|
#else
|
|
static int debug = 0;
|
|
#endif
|
|
|
|
static pid_t children;
|
|
|
|
static void nonfs(int);
|
|
static void reapchild(int);
|
|
static void usage(void);
|
|
static void cleanup(int);
|
|
static void child_cleanup(int);
|
|
static void nfscbd_exit(int);
|
|
static void killchildren(void);
|
|
|
|
/*
|
|
* Nfs callback server daemon.
|
|
*
|
|
* 1 - do file descriptor and signal cleanup
|
|
* 2 - fork the nfscbd(s)
|
|
* 4 - create callback server socket(s)
|
|
* 5 - set up server socket for rpc
|
|
*
|
|
* 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().
|
|
*/
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct nfscbd_args nfscbdargs;
|
|
struct nfsd_nfscbd_args nfscbdargs2;
|
|
struct sockaddr_in inetaddr, inetpeer;
|
|
fd_set ready, sockbits;
|
|
int ch, connect_type_cnt, maxsock, msgsock, error;
|
|
int nfssvc_flag, on, sock, tcpsock, ret, mustfreeai = 0;
|
|
char *cp, princname[128];
|
|
char myname[MAXHOSTNAMELEN], *myfqdnname = NULL;
|
|
struct addrinfo *aip, hints;
|
|
pid_t pid;
|
|
short myport = NFSV4_CBPORT;
|
|
socklen_t len;
|
|
|
|
if (modfind("nfscl") < 0) {
|
|
/* Not present in kernel, try loading it */
|
|
if (kldload("nfscl") < 0 ||
|
|
modfind("nfscl") < 0)
|
|
errx(1, "nfscl is not available");
|
|
}
|
|
/*
|
|
* First, get our fully qualified host name, if possible.
|
|
*/
|
|
if (gethostname(myname, MAXHOSTNAMELEN) >= 0) {
|
|
cp = strchr(myname, '.');
|
|
if (cp != NULL && *(cp + 1) != '\0') {
|
|
cp = myname;
|
|
} else {
|
|
/*
|
|
* No domain on myname, so try looking it up.
|
|
*/
|
|
cp = NULL;
|
|
memset((void *)&hints, 0, sizeof (hints));
|
|
hints.ai_flags = AI_CANONNAME;
|
|
error = getaddrinfo(myname, NULL, &hints, &aip);
|
|
if (error == 0) {
|
|
if (aip->ai_canonname != NULL &&
|
|
(cp = strchr(aip->ai_canonname, '.')) != NULL
|
|
&& *(cp + 1) != '\0') {
|
|
cp = aip->ai_canonname;
|
|
mustfreeai = 1;
|
|
} else {
|
|
freeaddrinfo(aip);
|
|
}
|
|
}
|
|
}
|
|
if (cp == NULL)
|
|
warnx("Can't get fully qualified host name");
|
|
myfqdnname = cp;
|
|
}
|
|
|
|
princname[0] = '\0';
|
|
#define GETOPT "p:P:"
|
|
#define USAGE "[ -p port_num ] [ -P client_principal ]"
|
|
while ((ch = getopt(argc, argv, GETOPT)) != -1)
|
|
switch (ch) {
|
|
case 'p':
|
|
myport = atoi(optarg);
|
|
if (myport < 1) {
|
|
warnx("port# non-positive, reset to %d",
|
|
NFSV4_CBPORT);
|
|
myport = NFSV4_CBPORT;
|
|
}
|
|
break;
|
|
case 'P':
|
|
cp = optarg;
|
|
if (cp != NULL && strlen(cp) > 0 &&
|
|
strlen(cp) < sizeof (princname)) {
|
|
if (strchr(cp, '@') == NULL &&
|
|
myfqdnname != NULL)
|
|
snprintf(princname, sizeof (princname),
|
|
"%s@%s", cp, myfqdnname);
|
|
else
|
|
strlcpy(princname, cp,
|
|
sizeof (princname));
|
|
} else {
|
|
warnx("client princ invalid. ignored\n");
|
|
}
|
|
break;
|
|
default:
|
|
case '?':
|
|
usage();
|
|
}
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if (argc > 0)
|
|
usage();
|
|
|
|
if (mustfreeai)
|
|
freeaddrinfo(aip);
|
|
nfscbdargs2.principal = (const char *)princname;
|
|
if (debug == 0) {
|
|
daemon(0, 0);
|
|
(void)signal(SIGTERM, SIG_IGN);
|
|
(void)signal(SIGHUP, SIG_IGN);
|
|
(void)signal(SIGINT, SIG_IGN);
|
|
(void)signal(SIGQUIT, SIG_IGN);
|
|
}
|
|
(void)signal(SIGSYS, nonfs);
|
|
(void)signal(SIGCHLD, reapchild);
|
|
|
|
openlog("nfscbd:", LOG_PID, LOG_DAEMON);
|
|
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
syslog(LOG_ERR, "fork: %m");
|
|
nfscbd_exit(1);
|
|
} else if (pid > 0) {
|
|
children = pid;
|
|
} else {
|
|
(void)signal(SIGUSR1, child_cleanup);
|
|
setproctitle("server");
|
|
nfssvc_flag = NFSSVC_NFSCBD;
|
|
if (nfssvc(nfssvc_flag, &nfscbdargs2) < 0) {
|
|
syslog(LOG_ERR, "nfssvc: %m");
|
|
nfscbd_exit(1);
|
|
}
|
|
exit(0);
|
|
}
|
|
(void)signal(SIGUSR1, cleanup);
|
|
|
|
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
|
|
syslog(LOG_ERR, "can't create udp socket");
|
|
nfscbd_exit(1);
|
|
}
|
|
memset(&inetaddr, 0, sizeof inetaddr);
|
|
inetaddr.sin_family = AF_INET;
|
|
inetaddr.sin_addr.s_addr = INADDR_ANY;
|
|
inetaddr.sin_port = htons(myport);
|
|
inetaddr.sin_len = sizeof(inetaddr);
|
|
ret = bind(sock, (struct sockaddr *)&inetaddr, sizeof(inetaddr));
|
|
/* If bind() fails, this is a restart, so just skip UDP. */
|
|
if (ret == 0) {
|
|
len = sizeof(inetaddr);
|
|
if (getsockname(sock, (struct sockaddr *)&inetaddr, &len) < 0){
|
|
syslog(LOG_ERR, "can't get bound addr");
|
|
nfscbd_exit(1);
|
|
}
|
|
nfscbdargs.port = ntohs(inetaddr.sin_port);
|
|
if (nfscbdargs.port != myport) {
|
|
syslog(LOG_ERR, "BAD PORT#");
|
|
nfscbd_exit(1);
|
|
}
|
|
nfscbdargs.sock = sock;
|
|
nfscbdargs.name = NULL;
|
|
nfscbdargs.namelen = 0;
|
|
if (nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs) < 0) {
|
|
syslog(LOG_ERR, "can't Add UDP socket");
|
|
nfscbd_exit(1);
|
|
}
|
|
}
|
|
(void)close(sock);
|
|
|
|
/* Now set up the master server socket waiting for tcp connections. */
|
|
on = 1;
|
|
FD_ZERO(&sockbits);
|
|
connect_type_cnt = 0;
|
|
if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
syslog(LOG_ERR, "can't create tcp socket");
|
|
nfscbd_exit(1);
|
|
}
|
|
if (setsockopt(tcpsock,
|
|
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
|
|
/* sin_port is already set */
|
|
inetaddr.sin_family = AF_INET;
|
|
inetaddr.sin_addr.s_addr = INADDR_ANY;
|
|
inetaddr.sin_port = htons(myport);
|
|
inetaddr.sin_len = sizeof(inetaddr);
|
|
if (bind(tcpsock,
|
|
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
|
|
syslog(LOG_ERR, "can't bind tcp addr");
|
|
nfscbd_exit(1);
|
|
}
|
|
if (listen(tcpsock, 5) < 0) {
|
|
syslog(LOG_ERR, "listen failed");
|
|
nfscbd_exit(1);
|
|
}
|
|
FD_SET(tcpsock, &sockbits);
|
|
maxsock = tcpsock;
|
|
connect_type_cnt++;
|
|
|
|
setproctitle("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");
|
|
nfscbd_exit(1);
|
|
}
|
|
}
|
|
if (FD_ISSET(tcpsock, &ready)) {
|
|
len = sizeof(inetpeer);
|
|
if ((msgsock = accept(tcpsock,
|
|
(struct sockaddr *)&inetpeer, &len)) < 0) {
|
|
syslog(LOG_ERR, "accept failed: %m");
|
|
nfscbd_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");
|
|
nfscbdargs.sock = msgsock;
|
|
nfscbdargs.name = (caddr_t)&inetpeer;
|
|
nfscbdargs.namelen = sizeof(inetpeer);
|
|
nfssvc(NFSSVC_CBADDSOCK, &nfscbdargs);
|
|
(void)close(msgsock);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
errx(1, "usage: nfscbd %s", USAGE);
|
|
}
|
|
|
|
static void
|
|
nonfs(int signo __unused)
|
|
{
|
|
syslog(LOG_ERR, "missing system call: NFS not available");
|
|
}
|
|
|
|
static void
|
|
reapchild(int signo __unused)
|
|
{
|
|
pid_t pid;
|
|
|
|
while ((pid = wait3(NULL, WNOHANG, NULL)) > 0) {
|
|
if (pid == children)
|
|
children = -1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
killchildren(void)
|
|
{
|
|
|
|
if (children > 0)
|
|
kill(children, SIGKILL);
|
|
}
|
|
|
|
/*
|
|
* Cleanup master after SIGUSR1.
|
|
*/
|
|
static void
|
|
cleanup(int signo __unused)
|
|
{
|
|
nfscbd_exit(0);
|
|
}
|
|
|
|
/*
|
|
* Cleanup child after SIGUSR1.
|
|
*/
|
|
static void
|
|
child_cleanup(int signo __unused)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
nfscbd_exit(int status __unused)
|
|
{
|
|
killchildren();
|
|
exit(status);
|
|
}
|