/*- * Copyright (c) 1990 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 char copyright[] = "@(#) Copyright (c) 1990 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint /*static char sccsid[] = "from: @(#)sliplogin.c 5.6 (Be********************************************* * * send.c -- * * Routine to send request packets to a name server. * * Based on "@(#)res_send.c 6.25 (Berkeley) 6/1/90". * ******************************************************************************* */ /* * Send query to name server and wait for reply. */ #include #include #include #include #include #include #include #include #include #include #include "res.h" extern int errno; static int s = -1; /* socket used for communications */ #ifndef FD_SET #define NFDBITS 32 #define FD_SETSIZE 32 #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS))) #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS))) #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS))) #define FD_ZERO(p) bzero((char *)(p), sizeof(*(p))) #endif #define SR 1 /* SendRequest style */ #ifndef DEBUG #define DEBUG #endif unsigned short nsport = NAMESERVER_PORT; /* ******************************************************************************* * * SendRequest -- * * Sends a request packet to a name server whose address * is specified by the first argument and returns with * the answer packet. * * Results: * SUCCESS - the request was sent and an answer * was received. * TIME_OUT - the virtual circuit connection timed-out * or a reply to a datagram wasn't received. * * ******************************************************************************* */ int SendRequest(nsAddrPtr, buf, buflen, answer, anslen, trueLenPtr) struct in_addr *nsAddrPtr; char *buf; int buflen; char *answer; u_int anslen; int *trueLenPtr; { register int n; int try, v_circuit, resplen, ns; int gotsomewhere = 0, connected = 0; int connreset = 0; u_short id, len; char *cp; fd_set dsmask; struct timeval timeout; HEADER *hp = (HEADER *) buf; HEADER *anhp = (HEADER *) answer; struct iovec iov[2]; int terrno = ETIMEDOUT; char junk[512]; #if SR struct sockaddr_in sin; if (_res.options & RES_DEBUG2) { printf("------------\nSendRequest(), len %d\n", buflen); Print_query(buf, buf+buflen, 1); } sin.sin_family = AF_INET; sin.sin_port = htons(nsport); sin.sin_addr = *nsAddrPtr; #else #ifdef DEBUG if (_res.options & RES_DEBUG) { printf("res_send()\n"); p_query(buf); } #endif DEBUG if (!(_res.options & RES_INIT)) if (res_init() == -1) { return(-1); } #endif /* SR */ v_circuit = (_res.options & RES_USEVC) || buflen > PACKETSZ; id = hp->id; /* * Send request, RETRY times, or until successful */ for (try = 0; try < _res.retry; try++) { #if !SR for (ns = 0; ns < _res.nscount; ns++) { #ifdef DEBUG if (_res.options & RES_DEBUG) printf("Querying server (# %d) address = %s\n", ns+1, inet_ntoa(_res.nsaddr_list[ns].sin_addr)); #endif DEBUG #endif /* !SR */ usevc: if (v_circuit) { int truncated = 0; /* * Use virtual circuit; * at most one attempt per server. */ try = _res.retry; if (s < 0) { s = socket(AF_INET, SOCK_STREAM, 0); if (s < 0) { terrno = errno; #ifdef DEBUG if (_res.options & RES_DEBUG) perror("socket (vc) failed"); #endif DEBUG continue; } #if SR if (connect(s, (struct sockaddr *)&sin, #else if (connect(s, (struct sockaddr *)&(_res.nsaddr_list[ns]), #endif sizeof(struct sockaddr)) < 0) { terrno = errno; #ifdef DEBUG if (_res.options & RES_DEBUG) perror("connect failed"); #endif DEBUG (void) close(s); s = -1; continue; } } /* * Send length & message */ len = htons((u_short)buflen); iov[0].iov_base = (caddr_t)&len; iov[0].iov_len = sizeof(len); iov[1].iov_base = buf; iov[1].iov_len = buflen; if (writev(s, iov, 2) != sizeof(len) + buflen) { terrno = errno; #ifdef DEBUG if (_res.options & RES_DEBUG) perror("write failed"); #endif DEBUG (void) close(s); s = -(argv[0], '/')) == NULL) name = argv[0]; s = getdtablesize(); for (fd = 3 ; fd < s ; fd++) (void) close(fd); openlog(name, LOG_PID, LOG_DAEMON); uid = getuid(); if (argc > 1) { findid(argv[1]); /* * Disassociate from current controlling terminal, if any, * and ensure that the slip line is our controlling terminal. */ #ifdef POSIX if (fork() > 0) exit(0); if (setsid() < 0) perror("setsid"); #else if ((fd = open("/dev/tty", O_RDONLY, 0)) >= 0) { extern char *ttyname(); (void) ioctl(fd, TIOCNOTTY, (caddr_t)0); (void) close(fd); /* open slip tty again to acquire as controlling tty? */ fd = open(ttyname(0), O_RDWR, 0); if (fd >= 0) (void) close(fd); } (void) setpgrp(0, getpid()); #endif if (argc > 2) { if ((fd = open(argv[2], O_RDWR)) == -1) { perror(argv[2]); exit(2); } (void) dup2(fd, 0); if (fd > 2) close(fd); } #ifdef TIOCSCTTY if (ioctl(STDIN_FILENO, TIOCSCTTY, (caddr_t)0) != 0) perror("ioctl (TIOCSCTTY)"); #endif } else { extern char *getlogin(); if ((name = getlogin()) == NULL) { syslog(LOG_ERR, "access denied - getlogin returned 0\n"); errx(1, "access denied - no username"); } findid(name); } if (!isatty(STDIN_FILENO)) { syslog(LOG_ERR, "stdin not a tty"); errx(1, "stdin not a tty"); } (void) fchmod(STDIN_FILENO, 0600); warnx("starting slip login for %s", loginname); #ifdef POSIX /* set up the line parameters */ if (tcgetattr(STDIN_FILENO, &tios) < 0) { syslog(LOG_ERR, "tcgetattr: %m"); exit(1); } otios = tios; cfmakeraw(&tios); tios.c_iflag &= ~IMAXBEL; if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &tios) < 0) { syslog(LOG_ERR, "tcsetattr: %m"); exit(1); } speed = cfgetispeed(&tios); #else /* set up the line parameters */ if (ioctl(STDIN_FILENO, TIOCGETP, (caddr_t)&tty) < 0) { syslog(LOG_ERR, "ioctl (TIOCGETP): %m"); exit(1); } otty = tty; speed = tty.sg_ispeed; tty.sg_flags = RAW | ANYP; if (ioctl(STDIN_FILENO, TIOCSETP, (caddr_t)&tty) < 0) { syslog(LOG_ERR, "ioctl (TIOCSETP): %m"); exit(1); } #endif /* find out what ldisc we started with */ if (ioctl(STDIN_FILENO, TIOCGETD, (caddr_t)&odisc) < 0) { syslog(LOG_ERR, "ioctl(TIOCGETD) (1): %m"); exit(1); } ldisc = SLIPDISC; if (ioctl(STDIN_FILENO, TIOCSETD, (caddr_t)&ldisc) < 0) { syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); exit(1); } /* find out what unit number we were assigned */ if (ioctl(STDIN_FILENO, SLIOCGUNIT, (caddr_t)&unit) < 0) { syslog(LOG_ERR, "ioctl (SLIOCGUNIT): %m"); exit(1); } (void) signal(SIGHUP, hup_handler); (void) signal(SIGTERM, hup_handler); syslog(LOG_INFO, "attaching slip unit %d for %s\n", unit, loginname); (void)sprintf(logincmd, "%s %d %d %s", loginfile, unit, speed, loginargs); /* * aim stdout and errout at /dev/null so logincmd output won't * babble into the slip tty line. */ (void) close(1); if ((fd = open(_PATH_DEVNULL, O_WRONLY)) != 1) { if (fd < 0) { syslog(LOG_ERR, "open /dev/null: %m"); exit(1); } (void) dup2(fd, 1); (void) close(fd); } (void) dup2(1, 2); /* * Run login and logout scripts as root (real and effective); * current route(8) is setuid root, and checks the real uid * to see whether changes are allowed (or just "route get"). */ (void) setuid(0); if (s = system(logincmd)) { syslog(LOG_ERR, "%s login failed: exit status %d from %s", loginname, s, loginfile); (void) ioctl(STDIN_FILENO, TIOCSETD, (caddr_t)&odisc); #ifdef POSIX (void) tcsetattr(STDIN_FILENO, TCSAFLUSH, &otios); #else (void) ioctl(STDIN_FILENO, TIOCSETP, (caddr_t)&otty); #endif exit(6); } /* twiddle thumbs until we get a signal */ while (1) sigpause(0); /* NOTREACHED */ }