2 * System-dependent procedures for pppd under Digital UNIX (OSF/1).
4 * Copyright (c) 1994 The Australian National University.
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies. This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
29 static char rcsid[] = "$Id: sys-osf.c,v 1.12 1997/04/30 05:58:44 paulus Exp $";
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <sys/stream.h>
48 #include <sys/stropts.h>
49 #include <sys/syslog.h>
54 #include <net/if_arp.h>
55 #include <net/route.h>
56 #include <net/ppp_defs.h>
57 #include <net/pppio.h>
58 #include <netinet/in.h>
63 static int fdmuxid = -1;
67 static int restore_term;
68 static struct termios inittermios;
69 static struct winsize wsinfo; /* Initial window size info */
70 static pid_t tty_sid; /* PID of our session leader */
72 extern u_char inpacket_buf[]; /* borrowed from main.c */
74 static int link_mtu, link_mru;
77 static int tty_nmodules;
78 static char tty_modules[NMODULES][FMNAMESZ+1];
80 static int closed_stdio;
81 static int initfdflags = -1;
82 static int orig_ttyfd = -1;
84 static int if_is_up; /* Interface has been marked up */
85 static u_int32_t ifaddrs[2]; /* local and remote addresses */
86 static u_int32_t default_route_gateway; /* Gateway for default route added */
87 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
89 /* Prototypes for procedures local to this file. */
90 static int translate_speed __P((int));
91 static int baud_rate_of __P((int));
92 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
93 static int strioctl __P((int, int, void *, int, int));
97 * sys_init - System-dependent initialization.
104 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
105 setlogmask(LOG_UPTO(LOG_INFO));
107 setlogmask(LOG_UPTO(LOG_DEBUG));
109 /* Get an internet socket for doing socket ioctl's on. */
110 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
111 syslog(LOG_ERR, "Couldn't create IP socket: %m");
116 tty_sid = getsid((pid_t)0);
119 * Open the ppp device.
121 pppfd = open("/dev/streams/ppp", O_RDWR | O_NONBLOCK, 0);
123 syslog(LOG_ERR, "Can't open /dev/streams/ppp: %m");
127 x = PPPDBG_LOG + PPPDBG_DRIVER;
128 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
131 /* Assign a new PPA and get its unit number. */
132 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
133 syslog(LOG_ERR, "Can't create new PPP interface: %m");
138 * Open the ppp device again and push the if_ppp module on it.
140 iffd = open("/dev/streams/ppp", O_RDWR, 0);
142 syslog(LOG_ERR, "Can't open /dev/streams/ppp (2): %m");
146 x = PPPDBG_LOG + PPPDBG_DRIVER;
147 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
149 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
150 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
153 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
154 syslog(LOG_ERR, "Can't push ppp interface module: %m");
158 x = PPPDBG_LOG + PPPDBG_IF;
159 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
161 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
162 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
166 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
167 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
173 * sys_cleanup - restore any system state we modified before exiting:
174 * mark the interface down, delete default route and/or proxy arp entry.
175 * This shouldn't call die() because it's called from die().
183 cifaddr(0, ifaddrs[0], ifaddrs[1]);
184 if (default_route_gateway)
185 cifdefaultroute(0, 0, default_route_gateway);
187 cifproxyarp(0, proxy_arp_addr);
191 * sys_close - Clean up in a child process before execing.
203 * sys_check_options - check the options that the user specified
212 * daemon - Detach us from controlling terminal session.
215 daemon(nochdir, noclose)
216 int nochdir, noclose;
220 if ((pid = fork()) < 0)
223 exit(0); /* parent dies */
228 fclose(stdin); /* don't need stdin, stdout, stderr */
236 * note_debug_level - note a change in the debug level.
242 setlogmask(LOG_UPTO(LOG_DEBUG));
244 setlogmask(LOG_UPTO(LOG_WARNING));
249 * ppp_available - check whether the system has any ppp interfaces
256 return stat("/dev/streams/ppp", &buf) >= 0;
259 char pipename[] = "/dev/streams/pipe";
262 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
266 streampipe(int fd[2])
268 if ((fd[0]=open(pipename, O_RDWR)) == -1)
270 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
273 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
278 return(ioctl(fd[0], I_PUSH, "pipemod"));
283 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
284 * modules (but ptys are, and pipes can be).
287 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
294 int ret, fret, rret, maxfd;
295 static char buffer[BUFFSIZE];
298 if (streampipe(fdes) != 0)
299 syslog(LOG_ERR, "streampipe(): %m\n");
300 else if (isastream(fdes[0]) == 1) {
301 if ((fret=fork()) < 0) {
302 syslog(LOG_ERR, "fork(): %m\n");
303 } else if (fret == 0) {
304 /* Process to forward things from pipe to tty */
305 sigemptyset(&(sa.sa_mask));
306 sa.sa_handler = SIG_DFL;
308 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
309 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
310 sigaction(SIGTERM, &sa, NULL);
311 sigaction(SIGCHLD, &sa, NULL);
312 sigaction(SIGUSR1, &sa, NULL);
313 sigaction(SIGUSR2, &sa, NULL);
316 maxfd = (fdes[1]>fd)?fdes[1]:fd;
319 FD_SET(fdes[1], &readfds);
320 FD_SET(fd, &readfds);
321 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
322 if (FD_ISSET(fd, &readfds)) {
323 rret = read(fd, buffer, BUFFSIZE);
325 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
328 write(fdes[1], buffer, rret);
331 if (FD_ISSET(fdes[1], &readfds)) {
332 rret = read(fdes[1], buffer, BUFFSIZE);
334 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
337 write(fd, buffer, rret);
352 * establish_ppp - Turn the serial port into a ppp interface.
360 if (isastream(fd) != 1) {
361 if ((ttyfd = fd = streamify(fd)) < 0) {
362 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
367 /* Pop any existing modules off the tty stream. */
369 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
370 || ioctl(fd, I_POP, 0) < 0)
372 syslog(LOG_ERR, "popping module %s\n", tty_modules[i]);
377 /* Push the async hdlc module and the compressor module. */
378 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
379 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
382 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
383 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
387 /* read mode, message non-discard mode */
388 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
389 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
393 /* Link the serial port under the PPP multiplexor. */
394 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
395 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
399 /* close stdin, stdout, stderr if they might refer to the device */
400 if (default_device && !closed_stdio) {
403 for (i = 0; i <= 2; ++i)
404 if (i != fd && i != sockfd)
410 * Set device for non-blocking reads.
412 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
413 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
414 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
419 * restore_loop - reattach the ppp unit to the loopback.
420 * This doesn't need to do anything because disestablish_ppp does it.
428 * disestablish_ppp - Restore the serial port to normal operation.
429 * It attempts to reconstruct the stream with the previously popped
430 * modules. This shouldn't call die() because it's called from die().
439 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
441 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
445 /* Reset non-blocking mode on the file descriptor. */
446 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
447 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
451 while (ioctl(fd, I_POP, 0) >= 0)
453 for (i = tty_nmodules - 1; i >= 0; --i)
454 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
455 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
459 if (hungup && default_device && tty_sid > 0) {
461 * If we have received a hangup, we need to send a SIGHUP
462 * to the terminal's controlling process. The reason is
463 * that the original stream head for the terminal hasn't
464 * seen the M_HANGUP message (it went up through the ppp
465 * driver to the stream head for our fd to /dev/ppp).
467 syslog(LOG_DEBUG, "sending hangup to %d", tty_sid);
468 if (kill(tty_sid, SIGHUP) < 0)
469 syslog(LOG_ERR, "couldn't kill pgrp: %m");
471 if (orig_ttyfd >= 0) {
473 (void)wait((void *)0);
481 * Check whether the link seems not to be 8-bit clean.
489 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
494 s = "bit 7 set to 1";
497 s = "bit 7 set to 0";
507 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
508 syslog(LOG_WARNING, "All received characters had %s", s);
513 * List of valid speeds.
516 int speed_int, speed_val;
588 * Translate from bits/second to a speed_t.
594 struct speed *speedp;
598 for (speedp = speeds; speedp->speed_int; speedp++)
599 if (bps == speedp->speed_int)
600 return speedp->speed_val;
601 syslog(LOG_WARNING, "speed %d not supported", bps);
606 * Translate from a speed_t to bits/second.
612 struct speed *speedp;
616 for (speedp = speeds; speedp->speed_int; speedp++)
617 if (speed == speedp->speed_val)
618 return speedp->speed_int;
623 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
624 * at the requested speed, etc. If `local' is true, set CLOCAL
625 * regardless of whether the modem option was specified.
628 set_up_tty(fd, local)
634 if (tcgetattr(fd, &tios) < 0) {
635 syslog(LOG_ERR, "tcgetattr: %m");
641 ioctl(fd, TIOCGWINSZ, &wsinfo);
644 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
646 tios.c_cflag |= CRTSCTS;
647 else if (crtscts < 0)
648 tios.c_cflag &= ~CRTSCTS;
650 tios.c_cflag |= CS8 | CREAD | HUPCL;
652 tios.c_cflag |= CLOCAL;
653 tios.c_iflag = IGNBRK | IGNPAR;
657 tios.c_cc[VTIME] = 0;
660 tios.c_iflag |= IXON | IXOFF;
661 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
662 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
665 speed = translate_speed(inspeed);
667 cfsetospeed(&tios, speed);
668 cfsetispeed(&tios, speed);
670 speed = cfgetospeed(&tios);
672 * We can't proceed if the serial port speed is 0,
673 * since that implies that the serial port is disabled.
676 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
682 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
683 syslog(LOG_ERR, "tcsetattr: %m");
687 baud_rate = inspeed = baud_rate_of(speed);
692 * restore_tty - restore the terminal to the saved settings.
699 if (!default_device) {
701 * Turn off echoing, because otherwise we can get into
702 * a loop with the tty and the modem echoing to each other.
703 * We presume we are the sole user of this tty device, so
704 * when we close it, it will revert to its defaults anyway.
706 inittermios.c_lflag &= ~(ECHO | ECHONL);
708 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
709 if (!hungup && errno != ENXIO)
710 syslog(LOG_WARNING, "tcsetattr: %m");
711 ioctl(fd, TIOCSWINSZ, &wsinfo);
717 * setdtr - control the DTR line on the serial port.
718 * This is called from die(), so it shouldn't call die().
724 int modembits = TIOCM_DTR;
726 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
730 * open_loopback - open the device we use for getting packets
731 * in demand mode. Under Solaris 2, we use our existing fd
740 * output - Output PPP packet.
753 log_packet(p, len, "sent ", LOG_DEBUG);
756 data.buf = (caddr_t) p;
758 while (putmsg(pppfd, NULL, &data, 0) < 0) {
759 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
761 syslog(LOG_ERR, "Couldn't send packet: %m");
765 pfd.events = POLLOUT;
766 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
772 * wait_input - wait until there is data available on fd,
773 * for the length of time specified by *timo (indefinite
778 struct timeval *timo;
783 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
785 pfd.events = POLLIN | POLLPRI | POLLHUP;
786 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
787 syslog(LOG_ERR, "poll: %m");
793 * wait_loop_output - wait until there is data available on the
794 * loopback, for the length of time specified by *timo (indefinite
798 wait_loop_output(timo)
799 struct timeval *timo;
805 * wait_time - wait for a given length of time or until a
806 * signal is received.
810 struct timeval *timo;
814 n = select(0, NULL, NULL, NULL, timo);
815 if (n < 0 && errno != EINTR) {
816 syslog(LOG_ERR, "select: %m");
823 * read_packet - get a PPP packet from the serial device.
829 struct strbuf ctrl, data;
831 unsigned char ctrlbuf[64];
834 data.maxlen = PPP_MRU + PPP_HDRLEN;
835 data.buf = (caddr_t) buf;
836 ctrl.maxlen = sizeof(ctrlbuf);
837 ctrl.buf = (caddr_t) ctrlbuf;
839 len = getmsg(pppfd, &ctrl, &data, &flags);
841 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
843 syslog(LOG_ERR, "Error reading packet: %m");
851 * Got a M_PROTO or M_PCPROTO message. Huh?
854 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
860 * get_loop_output - get outgoing packets from the ppp device,
861 * and detect when we want to bring the real link up.
862 * Return value is 1 if we need to bring up the link, 0 otherwise.
870 while ((len = read_packet(inpacket_buf)) > 0) {
871 if (loop_frame(inpacket_buf, len))
878 * ppp_send_config - configure the transmit characteristics of
882 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
890 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
891 if (hungup && errno == ENXIO)
893 syslog(LOG_ERR, "Couldn't set MTU: %m");
895 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
896 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
898 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
899 cf[1] = COMP_PROT | COMP_AC;
900 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
901 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
906 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
909 ppp_set_xaccm(unit, accm)
913 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
914 if (!hungup || errno != ENXIO)
915 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
920 * ppp_recv_config - configure the receive-side characteristics of
924 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
932 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
933 if (hungup && errno == ENXIO)
935 syslog(LOG_ERR, "Couldn't set MRU: %m");
937 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
938 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
940 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
941 cf[1] = DECOMP_PROT | DECOMP_AC;
942 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
943 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
948 * ccp_test - ask kernel whether a given compression method
949 * is acceptable for use.
951 * In Digital UNIX the memory buckets for chunks >16K are not
952 * primed when the system comes up. That means we're not
953 * likely to get the memory needed for the compressor on
954 * the first try. The way we work around this is to have
955 * the driver spin off a thread to go get the memory for us
956 * (we can't block at that point in a streams context.)
958 * This code synchronizes with the thread when it has returned
959 * with the memory we need. The driver will continue to return
960 * with EAGAIN until the thread comes back. We give up here
961 * if after 10 attempts in one second we still don't have memory.
962 * It's up to the driver to not lose track of that memory if
963 * thread takes too long to return.
966 ccp_test(unit, opt_ptr, opt_len, for_transmit)
967 int unit, opt_len, for_transmit;
974 tval.tv_usec = 100000;
975 for (i = 0; i < 10; ++i) {
976 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
977 opt_ptr, opt_len, 0) >= 0) {
985 syslog(LOG_ERR, "hard failure trying to get memory for a compressor: %m");
986 return (errno == ENOSR)? 0: -1;
990 * ccp_flags_set - inform kernel about the current state of CCP.
993 ccp_flags_set(unit, isopen, isup)
994 int unit, isopen, isup;
998 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
999 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1000 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1001 if (!hungup || errno != ENXIO)
1002 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
1007 * get_idle_time - return how long the link has been idle.
1010 get_idle_time(u, ip)
1012 struct ppp_idle *ip;
1014 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1019 * ccp_fatal_error - returns 1 if decompression was disabled as a
1020 * result of an error detected after decompression of a packet,
1021 * 0 otherwise. This is necessary because of patent nonsense.
1024 ccp_fatal_error(unit)
1030 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1031 if (errno != ENXIO && errno != EINVAL)
1032 syslog(LOG_ERR, "Couldn't get compression flags: %m");
1035 return cf[0] & CCP_FATALERROR;
1039 * sifvjcomp - config tcp header compression
1042 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1043 int u, vjcomp, xcidcomp, xmaxcid;
1049 maxcid[0] = xcidcomp;
1050 maxcid[1] = 15; /* XXX should be rmaxcid */
1051 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1052 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
1056 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1057 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1058 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1059 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1061 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
1068 * sifup - Config the interface up and enable IP packets to pass.
1076 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1077 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1078 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
1081 ifr.ifr_flags |= IFF_UP;
1082 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1083 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
1091 * sifdown - Config the interface down and disable IP.
1099 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1100 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1101 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
1104 if ((ifr.ifr_flags & IFF_UP) != 0) {
1105 ifr.ifr_flags &= ~IFF_UP;
1106 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1107 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
1116 * sifnpmode - Set the mode for handling packets for a given NP.
1119 sifnpmode(u, proto, mode)
1127 npi[1] = (int) mode;
1128 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1129 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
1135 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1138 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1140 #define SET_SA_FAMILY(addr, family) \
1141 BZERO((char *) &(addr), sizeof(addr)); \
1142 addr.sa_family = (family); \
1143 addr.sa_len = sizeof ((addr))
1146 * sifaddr - Config the interface IP addresses and netmask.
1154 struct ifaliasreq addreq;
1159 /* flush old address, if any
1161 bzero(&ifr, sizeof (ifr));
1162 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1163 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1164 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1165 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1166 && errno != EADDRNOTAVAIL) {
1167 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1171 bzero(&addreq, sizeof (addreq));
1172 strncpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1173 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1174 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1175 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1176 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1179 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1180 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1181 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1184 /* install new src/dst and (possibly) netmask
1186 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1187 syslog(LOG_ERR, "ioctl(SIOCPIFADDR): %m");
1191 ifr.ifr_metric = link_mtu;
1192 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1193 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
1204 * cifaddr - Clear the interface IP addresses, and delete routes
1205 * through the interface if possible.
1215 bzero(&ifr, sizeof (ifr));
1216 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1217 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1218 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1219 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1220 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1228 * sifdefaultroute - assign a default route through the address given.
1231 sifdefaultroute(u, l, g)
1237 BZERO(&rt, sizeof(rt));
1238 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1239 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1240 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1241 rt.rt_flags = RTF_GATEWAY;
1242 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1243 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1246 default_route_gateway = g;
1252 * cifdefaultroute - delete a default route through the address given.
1255 cifdefaultroute(u, l, g)
1261 BZERO(&rt, sizeof(rt));
1262 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1263 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1264 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1265 rt.rt_flags = RTF_GATEWAY;
1266 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1267 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1270 default_route_gateway = 0;
1275 * sifproxyarp - Make a proxy ARP entry for the peer.
1278 sifproxyarp(unit, hisaddr)
1282 struct arpreq arpreq;
1284 BZERO(&arpreq, sizeof(arpreq));
1287 * Get the hardware address of an interface on the same subnet
1288 * as our local address.
1290 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1291 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1295 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1296 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1297 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1298 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1299 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1303 proxy_arp_addr = hisaddr;
1309 * cifproxyarp - Delete the proxy ARP entry for the peer.
1312 cifproxyarp(unit, hisaddr)
1316 struct arpreq arpreq;
1318 BZERO(&arpreq, sizeof(arpreq));
1319 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1320 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1321 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1322 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1330 * get_ether_addr - get the hardware address of an interface on the
1331 * the same subnet as ipaddr.
1336 get_ether_addr(ipaddr, hwaddr)
1338 struct sockaddr *hwaddr;
1340 struct ifreq *ifr, *ifend;
1341 u_int32_t ina, mask;
1344 struct ifreq ifs[MAX_IFS];
1345 struct ifdevea ifdevreq;
1347 ifc.ifc_len = sizeof(ifs);
1349 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1350 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1355 * Scan through looking for an interface with an Internet
1356 * address on the same subnet as `ipaddr'.
1358 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1359 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1360 if (ifr->ifr_addr.sa_family == AF_INET) {
1363 * Check that the interface is up, and not point-to-point
1366 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1367 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1369 if ((ifreq.ifr_flags &
1370 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1371 != (IFF_UP|IFF_BROADCAST))
1375 * Get its netmask and check that it's on the right subnet.
1377 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1379 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1380 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1381 if ((ipaddr & mask) != (ina & mask))
1386 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1387 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1393 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1395 strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1397 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1398 perror("ioctl(SIOCRPHYSADDR)");
1402 hwaddr->sa_family = AF_UNSPEC;
1403 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1407 #define WTMPFILE "/usr/adm/wtmp"
1410 logwtmp(line, name, host)
1411 const char *line, *name, *host;
1417 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1419 if (!fstat(fd, &buf)) {
1420 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1421 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1422 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1423 (void)time(&ut.ut_time);
1424 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1425 (void)ftruncate(fd, buf.st_size);
1431 * Return user specified netmask, modified by any mask we might determine
1432 * for address `addr' (in network byte order).
1433 * Here we scan through the system's list of interfaces, looking for
1434 * any non-point-to-point interfaces which might appear to be on the same
1435 * network as `addr'. If we find any, we OR in their netmask to the
1436 * user-specified netmask.
1442 u_int32_t mask, nmask, ina;
1443 struct ifreq *ifr, *ifend, ifreq;
1447 if (IN_CLASSA(addr)) /* determine network mask for address class */
1448 nmask = IN_CLASSA_NET;
1449 else if (IN_CLASSB(addr))
1450 nmask = IN_CLASSB_NET;
1452 nmask = IN_CLASSC_NET;
1453 /* class D nets are disallowed by bad_ip_adrs */
1454 mask = netmask | htonl(nmask);
1457 * Scan through the system's network interfaces.
1459 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1460 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1461 if (ifc.ifc_req == 0)
1463 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1464 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1467 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1468 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1470 * Check the interface's internet address.
1472 if (ifr->ifr_addr.sa_family == AF_INET) {
1473 ina = INET_ADDR(ifr->ifr_addr);
1474 if ((ntohl(ina) & nmask) != (addr & nmask))
1477 * Check that the interface is up, and not point-to-point or loopback.
1479 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1480 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1482 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1486 * Get its netmask and OR it into our mask.
1488 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1490 mask |= INET_ADDR(ifreq.ifr_addr);
1493 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1494 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1502 strioctl(fd, cmd, ptr, ilen, olen)
1503 int fd, cmd, ilen, olen;
1506 struct strioctl str;
1512 if (ioctl(fd, I_STR, &str) == -1)
1514 if (str.ic_len != olen)
1515 syslog(LOG_DEBUG, "strioctl: expected %d bytes, got %d for cmd %x\n",
1516 olen, str.ic_len, cmd);
1521 * Code for locking/unlocking the serial device.
1522 * This code is derived from chat.c.
1525 #if !defined(HDB) && !defined(SUNOS3)
1526 #define HDB 1 /* ascii lock files are the default */
1532 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1534 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1536 #endif /* LOCK_DIR */
1538 static char *lock_file; /* name of lock file created */
1541 * lock - create a lock file for the named device.
1547 char hdb_lock_buffer[12];
1551 if ((p = strrchr(dev, '/')) != NULL)
1553 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1554 if (lock_file == NULL)
1555 novm("lock file name");
1556 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1558 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1560 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1561 /* Read the lock file to find out who has the device locked */
1563 n = read(fd, hdb_lock_buffer, 11);
1565 hdb_lock_buffer[n] = 0;
1566 pid = atoi(hdb_lock_buffer);
1569 n = read(fd, &pid, sizeof(pid));
1572 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1575 if (kill(pid, 0) == -1 && errno == ESRCH) {
1576 /* pid no longer exists - remove the lock file */
1577 if (unlink(lock_file) == 0) {
1579 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1583 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1586 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1591 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1598 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1599 write(fd, hdb_lock_buffer, 11);
1602 write(fd, &pid, sizeof pid);
1610 * unlock - remove our lockfile
1623 set_filters(pass, active)
1624 struct bpf_program *pass, *active;
1630 bpf_compile(program, buf, optimize)
1631 struct bpf_program *program;
1645 bpf_filter(pc, p, wirelen, buflen)
1646 struct bpf_insn *pc;