freebsd-skq/sbin/dump/dumprmt.c
wollman d226ef144b Implement Kerberized rcmd for rdump/rrestore. This is lacking the
options one would normally expect to set the realm, enable encryption,
and whatnot, but this actually is able to contact the remote server,
so at least it's a start.  (As a bonus, the stripped static binary is
unquestionably exportable.)
1997-04-29 17:46:27 +00:00

421 lines
8.5 KiB
C

/*-
* Copyright (c) 1980, 1993
* The Regents of the University of California. 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.
* 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 sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mtio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>
#ifdef sunos
#include <sys/vnode.h>
#include <ufs/inode.h>
#else
#include <ufs/ufs/dinode.h>
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <protocols/dumprestore.h>
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif
#include "pathnames.h"
#include "dump.h"
#define TS_CLOSED 0
#define TS_OPEN 1
static int rmtstate = TS_CLOSED;
static int rmtape;
static char *rmtpeer;
static int okname __P((char *));
static int rmtcall __P((char *, char *));
static void rmtconnaborted __P((/* int, int */));
static int rmtgetb __P((void));
static void rmtgetconn __P((void));
static void rmtgets __P((char *, int));
static int rmtreply __P((char *));
#ifdef KERBEROS
int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *));
#endif
static int errfd = -1;
extern int dokerberos;
extern int ntrec; /* blocking factor on tape */
int
rmthost(host)
char *host;
{
rmtpeer = malloc(strlen(host) + 1);
if (rmtpeer)
strcpy(rmtpeer, host);
else
rmtpeer = host;
signal(SIGPIPE, rmtconnaborted);
rmtgetconn();
if (rmtape < 0)
return (0);
return (1);
}
static void
rmtconnaborted()
{
msg("Lost connection to remote host.\n");
if (errfd != -1) {
fd_set r;
struct timeval t;
FD_ZERO(&r);
FD_SET(errfd, &r);
t.tv_sec = 0;
t.tv_usec = 0;
if (select(errfd + 1, &r, NULL, NULL, &t)) {
int i;
char buf[2048];
if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) {
buf[i] = '\0';
msg("on %s: %s%s", rmtpeer, buf,
buf[i - 1] == '\n' ? "" : "\n");
}
}
}
exit(X_ABORT);
}
void
rmtgetconn()
{
register char *cp;
register const char *rmt;
static struct servent *sp = NULL;
static struct passwd *pwd = NULL;
#ifdef notdef
static int on = 1;
#endif
char *tuser;
int size;
int throughput;
if (sp == NULL) {
sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp");
if (sp == NULL) {
msg("%s/tcp: unknown service\n",
dokerberos ? "kshell" : "shell");
exit(X_ABORT);
}
pwd = getpwuid(getuid());
if (pwd == NULL) {
msg("who are you?\n");
exit(X_ABORT);
}
}
if ((cp = strchr(rmtpeer, '@')) != NULL) {
tuser = rmtpeer;
*cp = '\0';
if (!okname(tuser))
exit(X_ABORT);
rmtpeer = ++cp;
} else
tuser = pwd->pw_name;
if ((rmt = getenv("RMT")) == NULL)
rmt = _PATH_RMT;
msg("");
#ifdef KERBEROS
if (dokerberos)
rmtape = krcmd(&rmtpeer, sp->s_port, tuser, rmt, &errfd,
(char *)0);
else
#endif
rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name,
tuser, rmt, &errfd);
if (rmtape < 0) {
msg("login to %s as %s failed.\n", rmtpeer, tuser);
return;
}
(void)fprintf(stderr, "Connection to %s established.\n", rmtpeer);
size = ntrec * TP_BSIZE;
if (size > 60 * 1024) /* XXX */
size = 60 * 1024;
/* Leave some space for rmt request/response protocol */
size += 2 * 1024;
while (size > TP_BSIZE &&
setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
size -= TP_BSIZE;
(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
throughput = IPTOS_THROUGHPUT;
if (setsockopt(rmtape, IPPROTO_IP, IP_TOS,
&throughput, sizeof(throughput)) < 0)
perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
#ifdef notdef
if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
perror("TCP_NODELAY setsockopt");
#endif
}
static int
okname(cp0)
char *cp0;
{
register char *cp;
register int c;
for (cp = cp0; *cp; cp++) {
c = *cp;
if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
msg("invalid user name %s\n", cp0);
return (0);
}
}
return (1);
}
int
rmtopen(tape, mode)
char *tape;
int mode;
{
char buf[256];
(void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode);
rmtstate = TS_OPEN;
return (rmtcall(tape, buf));
}
void
rmtclose()
{
if (rmtstate != TS_OPEN)
return;
rmtcall("close", "C\n");
rmtstate = TS_CLOSED;
}
int
rmtread(buf, count)
char *buf;
int count;
{
char line[30];
int n, i, cc;
extern errno;
(void)snprintf(line, sizeof (line), "R%d\n", count);
n = rmtcall("read", line);
if (n < 0) {
errno = n;
return (-1);
}
for (i = 0; i < n; i += cc) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0) {
rmtconnaborted();
}
}
return (n);
}
int
rmtwrite(buf, count)
char *buf;
int count;
{
char line[30];
(void)snprintf(line, sizeof (line), "W%d\n", count);
write(rmtape, line, strlen(line));
write(rmtape, buf, count);
return (rmtreply("write"));
}
void
rmtwrite0(count)
int count;
{
char line[30];
(void)snprintf(line, sizeof (line), "W%d\n", count);
write(rmtape, line, strlen(line));
}
void
rmtwrite1(buf, count)
char *buf;
int count;
{
write(rmtape, buf, count);
}
int
rmtwrite2()
{
return (rmtreply("write"));
}
int
rmtseek(offset, pos)
int offset, pos;
{
char line[80];
(void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos);
return (rmtcall("seek", line));
}
struct mtget mts;
struct mtget *
rmtstatus()
{
register int i;
register char *cp;
if (rmtstate != TS_OPEN)
return (NULL);
rmtcall("status", "S\n");
for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
*cp++ = rmtgetb();
return (&mts);
}
int
rmtioctl(cmd, count)
int cmd, count;
{
char buf[256];
if (count < 0)
return (-1);
(void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count);
return (rmtcall("ioctl", buf));
}
static int
rmtcall(cmd, buf)
char *cmd, *buf;
{
if (write(rmtape, buf, strlen(buf)) != strlen(buf))
rmtconnaborted();
return (rmtreply(cmd));
}
static int
rmtreply(cmd)
char *cmd;
{
register char *cp;
char code[30], emsg[BUFSIZ];
rmtgets(code, sizeof (code));
if (*code == 'E' || *code == 'F') {
rmtgets(emsg, sizeof (emsg));
msg("%s: %s", cmd, emsg);
if (*code == 'F') {
rmtstate = TS_CLOSED;
return (-1);
}
return (-1);
}
if (*code != 'A') {
/* Kill trailing newline */
cp = code + strlen(code);
if (cp > code && *--cp == '\n')
*cp = '\0';
msg("Protocol to remote tape server botched (code \"%s\").\n",
code);
rmtconnaborted();
}
return (atoi(code + 1));
}
int
rmtgetb()
{
char c;
if (read(rmtape, &c, 1) != 1)
rmtconnaborted();
return (c);
}
/* Get a line (guaranteed to have a trailing newline). */
void
rmtgets(line, len)
char *line;
int len;
{
register char *cp = line;
while (len > 1) {
*cp = rmtgetb();
if (*cp == '\n') {
cp[1] = '\0';
return;
}
cp++;
len--;
}
*cp = '\0';
msg("Protocol to remote tape server botched.\n");
msg("(rmtgets got \"%s\").\n", line);
rmtconnaborted();
}