+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
- * Reserved. This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.0 (the 'License'). You may not use this file
- * except in compliance with the License. Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License."
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*-
- * Copyright (c) 1983, 1988, 1989, 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 copyright[] =
-"@(#) Copyright (c) 1983, 1988, 1989, 1993\n\
- The Regents of the University of California. All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)rlogind.c 8.2 (Berkeley) 4/28/95";
-#endif /* not lint */
-
-/*
- * remote login server:
- * \0
- * remuser\0
- * locuser\0
- * terminal_type/speed\0
- * data
- */
-
-#define FD_SETSIZE 16 /* don't need many bits for select */
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <signal.h>
-#ifdef __APPLE__
-#include <sys/termios.h>
-#else
-#include <termios.h>
-#endif
-
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-
-#include <pwd.h>
-#include <syslog.h>
-#include <errno.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include "pathnames.h"
-
-#ifndef TIOCPKT_WINDOW
-#define TIOCPKT_WINDOW 0x80
-#endif
-
-#ifdef KERBEROS
-#include <kerberosIV/des.h>
-#include <kerberosIV/krb.h>
-#define SECURE_MESSAGE "This rlogin session is using DES encryption for all transmissions.\r\n"
-
-AUTH_DAT *kdata;
-KTEXT ticket;
-u_char auth_buf[sizeof(AUTH_DAT)];
-u_char tick_buf[sizeof(KTEXT_ST)];
-Key_schedule schedule;
-int doencrypt, retval, use_kerberos, vacuous;
-
-#define ARGSTR "alnkvx"
-#else
-#define ARGSTR "aln"
-#endif /* KERBEROS */
-
-char *env[2];
-#define NMAX 30
-char lusername[NMAX+1], rusername[NMAX+1];
-static char term[64] = "TERM=";
-#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
-int keepalive = 1;
-int check_all = 0;
-
-struct passwd *pwd;
-
-void doit __P((int, struct sockaddr_in *));
-int control __P((int, char *, int));
-void protocol __P((int, int));
-void cleanup __P((int));
-void fatal __P((int, char *, int));
-int do_rlogin __P((struct sockaddr_in *));
-void getstr __P((char *, int, char *));
-void setup_term __P((int));
-int do_krb_login __P((struct sockaddr_in *));
-void usage __P((void));
-int local_domain __P((char *));
-char *topdomain __P((char *));
-
-int
-main(argc, argv)
- int argc;
- char *argv[];
-{
- extern int __check_rhosts_file;
- struct sockaddr_in from;
- int ch, fromlen, on;
-
- openlog("rlogind", LOG_PID | LOG_CONS, LOG_AUTH);
-
- opterr = 0;
- while ((ch = getopt(argc, argv, ARGSTR)) != EOF)
- switch (ch) {
- case 'a':
- check_all = 1;
- break;
- case 'l':
- __check_rhosts_file = 0;
- break;
- case 'n':
- keepalive = 0;
- break;
-#ifdef KERBEROS
- case 'k':
- use_kerberos = 1;
- break;
- case 'v':
- vacuous = 1;
- break;
-#ifdef CRYPT
- case 'x':
- doencrypt = 1;
- break;
-#endif
-#endif
- case '?':
- default:
- usage();
- break;
- }
- argc -= optind;
- argv += optind;
-
-#ifdef KERBEROS
- if (use_kerberos && vacuous) {
- usage();
- fatal(STDERR_FILENO, "only one of -k and -v allowed", 0);
- }
-#endif
- fromlen = sizeof (from);
- if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
- syslog(LOG_ERR,"Can't get peer name of remote host: %m");
- fatal(STDERR_FILENO, "Can't get peer name of remote host", 1);
- }
- on = 1;
- if (keepalive &&
- setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0)
- syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
- on = IPTOS_LOWDELAY;
- if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
- syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
- doit(0, &from);
-}
-
-int child;
-int netf;
-char line[MAXPATHLEN];
-int confirmed;
-
-struct winsize win = { 0, 0, 0, 0 };
-
-
-void
-doit(f, fromp)
- int f;
- struct sockaddr_in *fromp;
-{
- int master, pid, on = 1;
- int authenticated = 0;
- register struct hostent *hp;
- char hostname[2 * MAXHOSTNAMELEN + 1];
- char c;
-
- alarm(60);
- read(f, &c, 1);
-
- if (c != 0)
- exit(1);
-#ifdef KERBEROS
- if (vacuous)
- fatal(f, "Remote host requires Kerberos authentication", 0);
-#endif
-
- alarm(0);
- fromp->sin_port = ntohs((u_short)fromp->sin_port);
- hp = gethostbyaddr((char *)&fromp->sin_addr, sizeof(struct in_addr),
- fromp->sin_family);
- if (hp)
- (void)strcpy(hostname, hp->h_name);
- else
- (void)strcpy(hostname, inet_ntoa(fromp->sin_addr));
-
-#ifdef KERBEROS
- if (use_kerberos) {
- retval = do_krb_login(fromp);
- if (retval == 0)
- authenticated++;
- else if (retval > 0)
- fatal(f, krb_err_txt[retval], 0);
- write(f, &c, 1);
- confirmed = 1; /* we sent the null! */
- } else
-#endif
- {
- if (fromp->sin_family != AF_INET ||
- fromp->sin_port >= IPPORT_RESERVED ||
- fromp->sin_port < IPPORT_RESERVED/2) {
- syslog(LOG_NOTICE, "Connection from %s on illegal port",
- inet_ntoa(fromp->sin_addr));
- fatal(f, "Permission denied", 0);
- }
-#ifdef IP_OPTIONS
- {
- u_char optbuf[BUFSIZ/3], *cp;
- char lbuf[BUFSIZ], *lp;
- int optsize = sizeof(optbuf), ipproto;
- struct protoent *ip;
-
- if ((ip = getprotobyname("ip")) != NULL)
- ipproto = ip->p_proto;
- else
- ipproto = IPPROTO_IP;
- if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf,
- &optsize) == 0 && optsize != 0) {
- lp = lbuf;
- for (cp = optbuf; optsize > 0; cp++, optsize--, lp += 3)
- sprintf(lp, " %2.2x", *cp);
- syslog(LOG_NOTICE,
- "Connection received using IP options (ignored):%s",
- lbuf);
- if (setsockopt(0, ipproto, IP_OPTIONS,
- (char *)NULL, optsize) != 0) {
- syslog(LOG_ERR,
- "setsockopt IP_OPTIONS NULL: %m");
- exit(1);
- }
- }
- }
-#endif
- if (do_rlogin(fromp) == 0)
- authenticated++;
- }
- if (confirmed == 0) {
- write(f, "", 1);
- confirmed = 1; /* we sent the null! */
- }
-#ifdef KERBEROS
-#ifdef CRYPT
- if (doencrypt)
- (void) des_write(f, SECURE_MESSAGE, sizeof(SECURE_MESSAGE) - 1);
-#endif
-#endif
- netf = f;
-
- pid = forkpty(&master, line, NULL, &win);
- if (pid < 0) {
- if (errno == ENOENT)
- fatal(f, "Out of ptys", 0);
- else
- fatal(f, "Forkpty", 1);
- }
- if (pid == 0) {
- if (f > 2) /* f should always be 0, but... */
- (void) close(f);
- setup_term(0);
- if (authenticated) {
-#ifdef KERBEROS
- if (use_kerberos && (pwd->pw_uid == 0))
- syslog(LOG_INFO|LOG_AUTH,
- "ROOT Kerberos login from %s.%s@%s on %s\n",
- kdata->pname, kdata->pinst, kdata->prealm,
- hostname);
-#endif
-
- execle(_PATH_LOGIN, "login", "-p",
- "-h", hostname, "-f", "--", lusername, NULL, env);
- } else
- execle(_PATH_LOGIN, "login", "-p",
- "-h", hostname, "--", lusername, NULL, env);
- fatal(STDERR_FILENO, _PATH_LOGIN, 1);
- /*NOTREACHED*/
- }
-#ifdef CRYPT
-#ifdef KERBEROS
- /*
- * If encrypted, don't turn on NBIO or the des read/write
- * routines will croak.
- */
-
- if (!doencrypt)
-#endif
-#endif
- ioctl(f, FIONBIO, &on);
- ioctl(master, FIONBIO, &on);
- ioctl(master, TIOCPKT, &on);
- signal(SIGCHLD, cleanup);
- protocol(f, master);
- signal(SIGCHLD, SIG_IGN);
- cleanup(0);
-}
-
-char magic[2] = { 0377, 0377 };
-char oobdata[] = {TIOCPKT_WINDOW};
-
-/*
- * Handle a "control" request (signaled by magic being present)
- * in the data stream. For now, we are only willing to handle
- * window size changes.
- */
-int
-control(pty, cp, n)
- int pty;
- char *cp;
- int n;
-{
- struct winsize w;
-
- if (n < 4+sizeof (w) || cp[2] != 's' || cp[3] != 's')
- return (0);
- oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */
- memmove(&w, cp+4, sizeof(w));
- w.ws_row = ntohs(w.ws_row);
- w.ws_col = ntohs(w.ws_col);
- w.ws_xpixel = ntohs(w.ws_xpixel);
- w.ws_ypixel = ntohs(w.ws_ypixel);
- (void)ioctl(pty, TIOCSWINSZ, &w);
- return (4+sizeof (w));
-}
-
-/*
- * rlogin "protocol" machine.
- */
-void
-protocol(f, p)
- register int f, p;
-{
- char pibuf[1024+1], fibuf[1024], *pbp, *fbp;
- register pcc = 0, fcc = 0;
- int cc, nfd, n;
- char cntl;
-
- /*
- * Must ignore SIGTTOU, otherwise we'll stop
- * when we try and set slave pty's window shape
- * (our controlling tty is the master pty).
- */
- (void) signal(SIGTTOU, SIG_IGN);
- send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */
- if (f > p)
- nfd = f + 1;
- else
- nfd = p + 1;
- if (nfd > FD_SETSIZE) {
- syslog(LOG_ERR, "select mask too small, increase FD_SETSIZE");
- fatal(f, "internal error (select mask too small)", 0);
- }
- for (;;) {
- fd_set ibits, obits, ebits, *omask;
-
- FD_ZERO(&ebits);
- FD_ZERO(&ibits);
- FD_ZERO(&obits);
- omask = (fd_set *)NULL;
- if (fcc) {
- FD_SET(p, &obits);
- omask = &obits;
- } else
- FD_SET(f, &ibits);
- if (pcc >= 0)
- if (pcc) {
- FD_SET(f, &obits);
- omask = &obits;
- } else
- FD_SET(p, &ibits);
- FD_SET(p, &ebits);
- if ((n = select(nfd, &ibits, omask, &ebits, 0)) < 0) {
- if (errno == EINTR)
- continue;
- fatal(f, "select", 1);
- }
- if (n == 0) {
- /* shouldn't happen... */
- sleep(5);
- continue;
- }
-#define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))
- if (FD_ISSET(p, &ebits)) {
- cc = read(p, &cntl, 1);
- if (cc == 1 && pkcontrol(cntl)) {
- cntl |= oobdata[0];
- send(f, &cntl, 1, MSG_OOB);
- if (cntl & TIOCPKT_FLUSHWRITE) {
- pcc = 0;
- FD_CLR(p, &ibits);
- }
- }
- }
- if (FD_ISSET(f, &ibits)) {
-#ifdef CRYPT
-#ifdef KERBEROS
- if (doencrypt)
- fcc = des_read(f, fibuf, sizeof(fibuf));
- else
-#endif
-#endif
- fcc = read(f, fibuf, sizeof(fibuf));
- if (fcc < 0 && errno == EWOULDBLOCK)
- fcc = 0;
- else {
- register char *cp;
- int left, n;
-
- if (fcc <= 0)
- break;
- fbp = fibuf;
-
- top:
- for (cp = fibuf; cp < fibuf+fcc-1; cp++)
- if (cp[0] == magic[0] &&
- cp[1] == magic[1]) {
- left = fcc - (cp-fibuf);
- n = control(p, cp, left);
- if (n) {
- left -= n;
- if (left > 0)
- bcopy(cp+n, cp, left);
- fcc -= n;
- goto top; /* n^2 */
- }
- }
- FD_SET(p, &obits); /* try write */
- }
- }
-
- if (FD_ISSET(p, &obits) && fcc > 0) {
- cc = write(p, fbp, fcc);
- if (cc > 0) {
- fcc -= cc;
- fbp += cc;
- }
- }
-
- if (FD_ISSET(p, &ibits)) {
- pcc = read(p, pibuf, sizeof (pibuf));
- pbp = pibuf;
- if (pcc < 0 && errno == EWOULDBLOCK)
- pcc = 0;
- else if (pcc <= 0)
- break;
- else if (pibuf[0] == 0) {
- pbp++, pcc--;
-#ifdef CRYPT
-#ifdef KERBEROS
- if (!doencrypt)
-#endif
-#endif
- FD_SET(f, &obits); /* try write */
- } else {
- if (pkcontrol(pibuf[0])) {
- pibuf[0] |= oobdata[0];
- send(f, &pibuf[0], 1, MSG_OOB);
- }
- pcc = 0;
- }
- }
- if ((FD_ISSET(f, &obits)) && pcc > 0) {
-#ifdef CRYPT
-#ifdef KERBEROS
- if (doencrypt)
- cc = des_write(f, pbp, pcc);
- else
-#endif
-#endif
- cc = write(f, pbp, pcc);
- if (cc < 0 && errno == EWOULDBLOCK) {
- /*
- * This happens when we try write after read
- * from p, but some old kernels balk at large
- * writes even when select returns true.
- */
- if (!FD_ISSET(p, &ibits))
- sleep(5);
- continue;
- }
- if (cc > 0) {
- pcc -= cc;
- pbp += cc;
- }
- }
- }
-}
-
-void
-cleanup(signo)
- int signo;
-{
- char *p;
-
- p = line + sizeof(_PATH_DEV) - 1;
- if (logout(p))
- logwtmp(p, "", "");
- (void)chmod(line, 0666);
- (void)chown(line, 0, 0);
- *p = 'p';
- (void)chmod(line, 0666);
- (void)chown(line, 0, 0);
- shutdown(netf, 2);
- exit(1);
-}
-
-void
-fatal(f, msg, syserr)
- int f;
- char *msg;
- int syserr;
-{
- int len;
- char buf[BUFSIZ], *bp = buf;
-
- /*
- * Prepend binary one to message if we haven't sent
- * the magic null as confirmation.
- */
- if (!confirmed)
- *bp++ = '\01'; /* error indicator */
- if (syserr)
- len = sprintf(bp, "rlogind: %s: %s.\r\n",
- msg, strerror(errno));
- else
- len = sprintf(bp, "rlogind: %s.\r\n", msg);
- (void) write(f, buf, bp + len - buf);
- exit(1);
-}
-
-int
-do_rlogin(dest)
- struct sockaddr_in *dest;
-{
- getstr(rusername, sizeof(rusername), "remuser too long");
- getstr(lusername, sizeof(lusername), "locuser too long");
- getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long");
-
- pwd = getpwnam(lusername);
- if (pwd == NULL)
- return (-1);
- if (pwd->pw_uid == 0)
- return (-1);
- /* XXX why don't we syslog() failure? */
- return (iruserok(dest->sin_addr.s_addr, 0, rusername, lusername));
-}
-
-void
-getstr(buf, cnt, errmsg)
- char *buf;
- int cnt;
- char *errmsg;
-{
- char c;
-
- do {
- if (read(0, &c, 1) != 1)
- exit(1);
- if (--cnt < 0)
- fatal(STDOUT_FILENO, errmsg, 0);
- *buf++ = c;
- } while (c != 0);
-}
-
-void
-setup_term(fd)
- int fd;
-{
- register char *cp = index(term+ENVSIZE, '/');
- char *speed;
- struct termios tt;
-
-#ifndef notyet
- tcgetattr(fd, &tt);
- if (cp) {
- *cp++ = '\0';
- speed = cp;
- cp = index(speed, '/');
- if (cp)
- *cp++ = '\0';
- cfsetspeed(&tt, atoi(speed));
- }
-
- tt.c_iflag = TTYDEF_IFLAG;
- tt.c_oflag = TTYDEF_OFLAG;
- tt.c_lflag = TTYDEF_LFLAG;
- tcsetattr(fd, TCSAFLUSH, &tt);
-#else
- if (cp) {
- *cp++ = '\0';
- speed = cp;
- cp = index(speed, '/');
- if (cp)
- *cp++ = '\0';
- tcgetattr(fd, &tt);
- cfsetspeed(&tt, atoi(speed));
- tcsetattr(fd, TCSAFLUSH, &tt);
- }
-#endif
-
- env[0] = term;
- env[1] = 0;
-}
-
-#ifdef KERBEROS
-#define VERSION_SIZE 9
-
-/*
- * Do the remote kerberos login to the named host with the
- * given inet address
- *
- * Return 0 on valid authorization
- * Return -1 on valid authentication, no authorization
- * Return >0 for error conditions
- */
-int
-do_krb_login(dest)
- struct sockaddr_in *dest;
-{
- int rc;
- char instance[INST_SZ], version[VERSION_SIZE];
- long authopts = 0L; /* !mutual */
- struct sockaddr_in faddr;
-
- kdata = (AUTH_DAT *) auth_buf;
- ticket = (KTEXT) tick_buf;
-
- instance[0] = '*';
- instance[1] = '\0';
-
-#ifdef CRYPT
- if (doencrypt) {
- rc = sizeof(faddr);
- if (getsockname(0, (struct sockaddr *)&faddr, &rc))
- return (-1);
- authopts = KOPT_DO_MUTUAL;
- rc = krb_recvauth(
- authopts, 0,
- ticket, "rcmd",
- instance, dest, &faddr,
- kdata, "", schedule, version);
- des_set_key(kdata->session, schedule);
-
- } else
-#endif
- rc = krb_recvauth(
- authopts, 0,
- ticket, "rcmd",
- instance, dest, (struct sockaddr_in *) 0,
- kdata, "", (bit_64 *) 0, version);
-
- if (rc != KSUCCESS)
- return (rc);
-
- getstr(lusername, sizeof(lusername), "locuser");
- /* get the "cmd" in the rcmd protocol */
- getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type");
-
- pwd = getpwnam(lusername);
- if (pwd == NULL)
- return (-1);
-
- /* returns nonzero for no access */
- if (kuserok(kdata, lusername) != 0)
- return (-1);
-
- return (0);
-
-}
-#endif /* KERBEROS */
-
-void
-usage()
-{
-#ifdef KERBEROS
- syslog(LOG_ERR, "usage: rlogind [-aln] [-k | -v]");
-#else
- syslog(LOG_ERR, "usage: rlogind [-aln]");
-#endif
-}
-
-/*
- * Check whether host h is in our local domain,
- * defined as sharing the last two components of the domain part,
- * or the entire domain part if the local domain has only one component.
- * If either name is unqualified (contains no '.'),
- * assume that the host is local, as it will be
- * interpreted as such.
- */
-int
-local_domain(h)
- char *h;
-{
- char localhost[MAXHOSTNAMELEN];
- char *p1, *p2;
-
- localhost[0] = 0;
- (void) gethostname(localhost, sizeof(localhost));
- p1 = topdomain(localhost);
- p2 = topdomain(h);
- if (p1 == NULL || p2 == NULL || !strcasecmp(p1, p2))
- return (1);
- return (0);
-}
-
-char *
-topdomain(h)
- char *h;
-{
- register char *p;
- char *maybe = NULL;
- int dots = 0;
-
- for (p = h + strlen(h); p >= h; p--) {
- if (*p == '.') {
- if (++dots == 2)
- return (p);
- maybe = p;
- }
- }
- return (maybe);
-}
projects / apple / network_cmds.git / blobdiff