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 1.18 1999/03/12 06:07:22 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>
53 #include <sys/ioctl.h>
55 #include <net/if_dl.h>
56 #include <net/if_arp.h>
57 #include <net/route.h>
58 #include <net/ppp_defs.h>
59 #include <net/pppio.h>
60 #include <netinet/in.h>
61 #include <arpa/inet.h>
66 static int fdmuxid = -1;
70 static int restore_term;
71 static struct termios inittermios;
72 static struct winsize wsinfo; /* Initial window size info */
73 static pid_t tty_sid; /* PID of our session leader */
75 extern u_char inpacket_buf[]; /* borrowed from main.c */
77 static int link_mtu, link_mru;
80 static int tty_nmodules;
81 static char tty_modules[NMODULES][FMNAMESZ+1];
83 static int closed_stdio;
84 static int initfdflags = -1;
85 static int orig_ttyfd = -1;
87 static int if_is_up; /* Interface has been marked up */
88 static u_int32_t ifaddrs[2]; /* local and remote addresses */
89 static u_int32_t default_route_gateway; /* Gateway for default route added */
90 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
92 /* Prototypes for procedures local to this file. */
93 static int translate_speed __P((int));
94 static int baud_rate_of __P((int));
95 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
96 static int strioctl __P((int, int, void *, int, int));
100 * sys_init - System-dependent initialization.
107 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
108 setlogmask(LOG_UPTO(LOG_INFO));
110 setlogmask(LOG_UPTO(LOG_DEBUG));
112 /* Get an internet socket for doing socket ioctl's on. */
113 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
114 syslog(LOG_ERR, "Couldn't create IP socket: %m");
119 tty_sid = getsid((pid_t)0);
122 * Open the ppp device.
124 pppfd = open("/dev/streams/ppp", O_RDWR | O_NONBLOCK, 0);
126 syslog(LOG_ERR, "Can't open /dev/streams/ppp: %m");
130 x = PPPDBG_LOG + PPPDBG_DRIVER;
131 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
134 /* Assign a new PPA and get its unit number. */
135 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
136 syslog(LOG_ERR, "Can't create new PPP interface: %m");
141 * Open the ppp device again and push the if_ppp module on it.
143 iffd = open("/dev/streams/ppp", O_RDWR, 0);
145 syslog(LOG_ERR, "Can't open /dev/streams/ppp (2): %m");
149 x = PPPDBG_LOG + PPPDBG_DRIVER;
150 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
152 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
153 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
156 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
157 syslog(LOG_ERR, "Can't push ppp interface module: %m");
161 x = PPPDBG_LOG + PPPDBG_IF;
162 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
164 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
165 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
169 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
170 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
176 * sys_cleanup - restore any system state we modified before exiting:
177 * mark the interface down, delete default route and/or proxy arp entry.
178 * This shouldn't call die() because it's called from die().
186 cifaddr(0, ifaddrs[0], ifaddrs[1]);
187 if (default_route_gateway)
188 cifdefaultroute(0, 0, default_route_gateway);
190 cifproxyarp(0, proxy_arp_addr);
194 * sys_close - Clean up in a child process before execing.
206 * sys_check_options - check the options that the user specified
216 * daemon - Detach us from controlling terminal session.
219 daemon(nochdir, noclose)
220 int nochdir, noclose;
224 if ((pid = fork()) < 0)
227 exit(0); /* parent dies */
232 fclose(stdin); /* don't need stdin, stdout, stderr */
240 * note_debug_level - note a change in the debug level.
246 setlogmask(LOG_UPTO(LOG_DEBUG));
248 setlogmask(LOG_UPTO(LOG_WARNING));
253 * ppp_available - check whether the system has any ppp interfaces
260 return stat("/dev/streams/ppp", &buf) >= 0;
263 char pipename[] = "/dev/streams/pipe";
266 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
270 streampipe(int fd[2])
272 if ((fd[0]=open(pipename, O_RDWR)) == -1)
274 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
277 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
282 return(ioctl(fd[0], I_PUSH, "pipemod"));
287 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
288 * modules (but ptys are, and pipes can be).
291 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
298 int ret, fret, rret, maxfd;
299 static char buffer[BUFFSIZE];
302 if (streampipe(fdes) != 0)
303 syslog(LOG_ERR, "streampipe(): %m\n");
304 else if (isastream(fdes[0]) == 1) {
305 if ((fret=fork()) < 0) {
306 syslog(LOG_ERR, "fork(): %m\n");
307 } else if (fret == 0) {
308 /* Process to forward things from pipe to tty */
309 sigemptyset(&(sa.sa_mask));
310 sa.sa_handler = SIG_DFL;
312 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
313 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
314 sigaction(SIGTERM, &sa, NULL);
315 sigaction(SIGCHLD, &sa, NULL);
316 sigaction(SIGUSR1, &sa, NULL);
317 sigaction(SIGUSR2, &sa, NULL);
320 maxfd = (fdes[1]>fd)?fdes[1]:fd;
323 FD_SET(fdes[1], &readfds);
324 FD_SET(fd, &readfds);
325 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
326 if (FD_ISSET(fd, &readfds)) {
327 rret = read(fd, buffer, BUFFSIZE);
329 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
332 write(fdes[1], buffer, rret);
335 if (FD_ISSET(fdes[1], &readfds)) {
336 rret = read(fdes[1], buffer, BUFFSIZE);
338 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
341 write(fd, buffer, rret);
356 * establish_ppp - Turn the serial port into a ppp interface.
364 if (isastream(fd) != 1) {
365 if ((ttyfd = fd = streamify(fd)) < 0) {
366 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
371 /* Pop any existing modules off the tty stream. */
373 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
374 || ioctl(fd, I_POP, 0) < 0)
376 syslog(LOG_ERR, "popping module %s\n", tty_modules[i]);
381 /* Push the async hdlc module and the compressor module. */
382 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
383 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
386 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
387 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
391 /* read mode, message non-discard mode */
392 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
393 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
397 /* Link the serial port under the PPP multiplexor. */
398 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
399 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
403 /* close stdin, stdout, stderr if they might refer to the device */
404 if (default_device && !closed_stdio) {
407 for (i = 0; i <= 2; ++i)
408 if (i != fd && i != sockfd)
414 * Set device for non-blocking reads.
416 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
417 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
418 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
423 * restore_loop - reattach the ppp unit to the loopback.
424 * This doesn't need to do anything because disestablish_ppp does it.
432 * disestablish_ppp - Restore the serial port to normal operation.
433 * It attempts to reconstruct the stream with the previously popped
434 * modules. This shouldn't call die() because it's called from die().
443 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
445 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
449 /* Reset non-blocking mode on the file descriptor. */
450 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
451 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
455 while (ioctl(fd, I_POP, 0) >= 0)
457 for (i = tty_nmodules - 1; i >= 0; --i)
458 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
459 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
463 if (hungup && default_device && tty_sid > 0) {
465 * If we have received a hangup, we need to send a SIGHUP
466 * to the terminal's controlling process. The reason is
467 * that the original stream head for the terminal hasn't
468 * seen the M_HANGUP message (it went up through the ppp
469 * driver to the stream head for our fd to /dev/ppp).
471 syslog(LOG_DEBUG, "sending hangup to %d", tty_sid);
472 if (kill(tty_sid, SIGHUP) < 0)
473 syslog(LOG_ERR, "couldn't kill pgrp: %m");
475 if (orig_ttyfd >= 0) {
477 (void)wait((void *)0);
485 * Check whether the link seems not to be 8-bit clean.
493 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
498 s = "bit 7 set to 1";
501 s = "bit 7 set to 0";
511 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
512 syslog(LOG_WARNING, "All received characters had %s", s);
517 * List of valid speeds.
520 int speed_int, speed_val;
592 * Translate from bits/second to a speed_t.
598 struct speed *speedp;
602 for (speedp = speeds; speedp->speed_int; speedp++)
603 if (bps == speedp->speed_int)
604 return speedp->speed_val;
605 syslog(LOG_WARNING, "speed %d not supported", bps);
610 * Translate from a speed_t to bits/second.
616 struct speed *speedp;
620 for (speedp = speeds; speedp->speed_int; speedp++)
621 if (speed == speedp->speed_val)
622 return speedp->speed_int;
627 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
628 * at the requested speed, etc. If `local' is true, set CLOCAL
629 * regardless of whether the modem option was specified.
632 set_up_tty(fd, local)
638 if (tcgetattr(fd, &tios) < 0) {
639 syslog(LOG_ERR, "tcgetattr: %m");
645 ioctl(fd, TIOCGWINSZ, &wsinfo);
648 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
650 tios.c_cflag |= CRTSCTS;
651 else if (crtscts < 0)
652 tios.c_cflag &= ~CRTSCTS;
654 tios.c_cflag |= CS8 | CREAD | HUPCL;
656 tios.c_cflag |= CLOCAL;
657 tios.c_iflag = IGNBRK | IGNPAR;
661 tios.c_cc[VTIME] = 0;
664 tios.c_iflag |= IXON | IXOFF;
665 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
666 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
669 speed = translate_speed(inspeed);
671 cfsetospeed(&tios, speed);
672 cfsetispeed(&tios, speed);
674 speed = cfgetospeed(&tios);
676 * We can't proceed if the serial port speed is 0,
677 * since that implies that the serial port is disabled.
680 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
686 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
687 syslog(LOG_ERR, "tcsetattr: %m");
691 baud_rate = inspeed = baud_rate_of(speed);
696 * restore_tty - restore the terminal to the saved settings.
703 if (!default_device) {
705 * Turn off echoing, because otherwise we can get into
706 * a loop with the tty and the modem echoing to each other.
707 * We presume we are the sole user of this tty device, so
708 * when we close it, it will revert to its defaults anyway.
710 inittermios.c_lflag &= ~(ECHO | ECHONL);
712 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
713 if (!hungup && errno != ENXIO)
714 syslog(LOG_WARNING, "tcsetattr: %m");
715 ioctl(fd, TIOCSWINSZ, &wsinfo);
721 * setdtr - control the DTR line on the serial port.
722 * This is called from die(), so it shouldn't call die().
728 int modembits = TIOCM_DTR;
730 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
734 * open_loopback - open the device we use for getting packets
735 * in demand mode. Under Solaris 2, we use our existing fd
744 * output - Output PPP packet.
757 log_packet(p, len, "sent ", LOG_DEBUG);
760 data.buf = (caddr_t) p;
762 while (putmsg(pppfd, NULL, &data, 0) < 0) {
763 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
765 syslog(LOG_ERR, "Couldn't send packet: %m");
769 pfd.events = POLLOUT;
770 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
776 * wait_input - wait until there is data available on fd,
777 * for the length of time specified by *timo (indefinite
782 struct timeval *timo;
787 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
789 pfd.events = POLLIN | POLLPRI | POLLHUP;
790 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
791 syslog(LOG_ERR, "poll: %m");
797 * wait_loop_output - wait until there is data available on the
798 * loopback, for the length of time specified by *timo (indefinite
802 wait_loop_output(timo)
803 struct timeval *timo;
809 * wait_time - wait for a given length of time or until a
810 * signal is received.
814 struct timeval *timo;
818 n = select(0, NULL, NULL, NULL, timo);
819 if (n < 0 && errno != EINTR) {
820 syslog(LOG_ERR, "select: %m");
827 * read_packet - get a PPP packet from the serial device.
833 struct strbuf ctrl, data;
835 unsigned char ctrlbuf[64];
838 data.maxlen = PPP_MRU + PPP_HDRLEN;
839 data.buf = (caddr_t) buf;
840 ctrl.maxlen = sizeof(ctrlbuf);
841 ctrl.buf = (caddr_t) ctrlbuf;
843 len = getmsg(pppfd, &ctrl, &data, &flags);
845 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
847 syslog(LOG_ERR, "Error reading packet: %m");
855 * Got a M_PROTO or M_PCPROTO message. Huh?
858 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
864 * get_loop_output - get outgoing packets from the ppp device,
865 * and detect when we want to bring the real link up.
866 * Return value is 1 if we need to bring up the link, 0 otherwise.
874 while ((len = read_packet(inpacket_buf)) > 0) {
875 if (loop_frame(inpacket_buf, len))
882 * ppp_send_config - configure the transmit characteristics of
886 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
894 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
895 if (hungup && errno == ENXIO)
897 syslog(LOG_ERR, "Couldn't set MTU: %m");
899 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
900 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
902 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
903 cf[1] = COMP_PROT | COMP_AC;
904 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
905 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
910 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
913 ppp_set_xaccm(unit, accm)
917 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
918 if (!hungup || errno != ENXIO)
919 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
924 * ppp_recv_config - configure the receive-side characteristics of
928 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
936 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
937 if (hungup && errno == ENXIO)
939 syslog(LOG_ERR, "Couldn't set MRU: %m");
941 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
942 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
944 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
945 cf[1] = DECOMP_PROT | DECOMP_AC;
946 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
947 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
952 * ccp_test - ask kernel whether a given compression method
953 * is acceptable for use.
955 * In Digital UNIX the memory buckets for chunks >16K are not
956 * primed when the system comes up. That means we're not
957 * likely to get the memory needed for the compressor on
958 * the first try. The way we work around this is to have
959 * the driver spin off a thread to go get the memory for us
960 * (we can't block at that point in a streams context.)
962 * This code synchronizes with the thread when it has returned
963 * with the memory we need. The driver will continue to return
964 * with EAGAIN until the thread comes back. We give up here
965 * if after 10 attempts in one second we still don't have memory.
966 * It's up to the driver to not lose track of that memory if
967 * thread takes too long to return.
970 ccp_test(unit, opt_ptr, opt_len, for_transmit)
971 int unit, opt_len, for_transmit;
978 tval.tv_usec = 100000;
979 for (i = 0; i < 10; ++i) {
980 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
981 opt_ptr, opt_len, 0) >= 0) {
989 syslog(LOG_ERR, "hard failure trying to get memory for a compressor: %m");
990 return (errno == ENOSR)? 0: -1;
994 * ccp_flags_set - inform kernel about the current state of CCP.
997 ccp_flags_set(unit, isopen, isup)
998 int unit, isopen, isup;
1002 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1003 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1004 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1005 if (!hungup || errno != ENXIO)
1006 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
1011 * get_idle_time - return how long the link has been idle.
1014 get_idle_time(u, ip)
1016 struct ppp_idle *ip;
1018 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1023 * ccp_fatal_error - returns 1 if decompression was disabled as a
1024 * result of an error detected after decompression of a packet,
1025 * 0 otherwise. This is necessary because of patent nonsense.
1028 ccp_fatal_error(unit)
1034 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1035 if (errno != ENXIO && errno != EINVAL)
1036 syslog(LOG_ERR, "Couldn't get compression flags: %m");
1039 return cf[0] & CCP_FATALERROR;
1043 * sifvjcomp - config tcp header compression
1046 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1047 int u, vjcomp, xcidcomp, xmaxcid;
1053 maxcid[0] = xcidcomp;
1054 maxcid[1] = 15; /* XXX should be rmaxcid */
1055 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1056 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
1060 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1061 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1062 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1063 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1065 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
1072 * sifup - Config the interface up and enable IP packets to pass.
1080 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
1081 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1082 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
1085 ifr.ifr_flags |= IFF_UP;
1086 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1087 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
1095 * sifdown - Config the interface down and disable IP.
1103 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
1104 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1105 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
1108 if ((ifr.ifr_flags & IFF_UP) != 0) {
1109 ifr.ifr_flags &= ~IFF_UP;
1110 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1111 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
1120 * sifnpmode - Set the mode for handling packets for a given NP.
1123 sifnpmode(u, proto, mode)
1131 npi[1] = (int) mode;
1132 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1133 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
1139 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1142 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1144 #define SET_SA_FAMILY(addr, family) \
1145 BZERO((char *) &(addr), sizeof(addr)); \
1146 addr.sa_family = (family); \
1147 addr.sa_len = sizeof ((addr))
1150 * sifaddr - Config the interface IP addresses and netmask.
1158 struct ifaliasreq addreq;
1163 /* flush old address, if any
1165 bzero(&ifr, sizeof (ifr));
1166 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
1167 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1168 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1169 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1170 && errno != EADDRNOTAVAIL) {
1171 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1175 bzero(&addreq, sizeof (addreq));
1176 strlcpy(addreq.ifra_name, sizeof (addreq.ifra_name), ifname);
1177 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1178 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1179 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1180 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1183 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1184 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1185 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1188 /* install new src/dst and (possibly) netmask
1190 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1191 syslog(LOG_ERR, "ioctl(SIOCPIFADDR): %m");
1195 ifr.ifr_metric = link_mtu;
1196 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1197 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
1208 * cifaddr - Clear the interface IP addresses, and delete routes
1209 * through the interface if possible.
1220 bzero(&ifr, sizeof (ifr));
1221 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
1222 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1223 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1224 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1225 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1233 * sifdefaultroute - assign a default route through the address given.
1236 sifdefaultroute(u, l, g)
1242 BZERO(&rt, sizeof(rt));
1243 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1244 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1245 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1246 rt.rt_flags = RTF_GATEWAY;
1247 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1248 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1251 default_route_gateway = g;
1257 * cifdefaultroute - delete a default route through the address given.
1260 cifdefaultroute(u, l, g)
1266 BZERO(&rt, sizeof(rt));
1267 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1268 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1269 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1270 rt.rt_flags = RTF_GATEWAY;
1271 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1272 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1275 default_route_gateway = 0;
1280 * sifproxyarp - Make a proxy ARP entry for the peer.
1283 sifproxyarp(unit, hisaddr)
1287 struct arpreq arpreq;
1289 BZERO(&arpreq, sizeof(arpreq));
1292 * Get the hardware address of an interface on the same subnet
1293 * as our local address.
1295 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1296 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1300 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1301 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1302 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1303 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1304 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1308 proxy_arp_addr = hisaddr;
1314 * cifproxyarp - Delete the proxy ARP entry for the peer.
1317 cifproxyarp(unit, hisaddr)
1321 struct arpreq arpreq;
1323 BZERO(&arpreq, sizeof(arpreq));
1324 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1325 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1326 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1327 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1335 * get_ether_addr - get the hardware address of an interface on the
1336 * the same subnet as ipaddr.
1341 get_ether_addr(ipaddr, hwaddr)
1343 struct sockaddr *hwaddr;
1345 struct ifreq *ifr, *ifend;
1346 u_int32_t ina, mask;
1349 struct ifreq ifs[MAX_IFS];
1350 struct ifdevea ifdevreq;
1352 ifc.ifc_len = sizeof(ifs);
1354 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1355 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1360 * Scan through looking for an interface with an Internet
1361 * address on the same subnet as `ipaddr'.
1363 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1364 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1365 if (ifr->ifr_addr.sa_family == AF_INET) {
1368 * Check that the interface is up, and not point-to-point
1371 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1372 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1374 if ((ifreq.ifr_flags &
1375 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1376 != (IFF_UP|IFF_BROADCAST))
1380 * Get its netmask and check that it's on the right subnet.
1382 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1384 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1385 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1386 if ((ipaddr & mask) != (ina & mask))
1391 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1392 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1398 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1400 strlcpy(ifdevreq.ifr_name, sizeof(ifdevreq.ifr_name), ifr->ifr_name);
1402 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1403 perror("ioctl(SIOCRPHYSADDR)");
1407 hwaddr->sa_family = AF_UNSPEC;
1408 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1412 #define WTMPFILE "/usr/adm/wtmp"
1415 logwtmp(line, name, host)
1416 const char *line, *name, *host;
1422 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1424 if (!fstat(fd, &buf)) {
1425 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1426 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1427 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1428 (void)time(&ut.ut_time);
1429 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1430 (void)ftruncate(fd, buf.st_size);
1436 * Return user specified netmask, modified by any mask we might determine
1437 * for address `addr' (in network byte order).
1438 * Here we scan through the system's list of interfaces, looking for
1439 * any non-point-to-point interfaces which might appear to be on the same
1440 * network as `addr'. If we find any, we OR in their netmask to the
1441 * user-specified netmask.
1447 u_int32_t mask, nmask, ina;
1448 struct ifreq *ifr, *ifend, ifreq;
1452 if (IN_CLASSA(addr)) /* determine network mask for address class */
1453 nmask = IN_CLASSA_NET;
1454 else if (IN_CLASSB(addr))
1455 nmask = IN_CLASSB_NET;
1457 nmask = IN_CLASSC_NET;
1458 /* class D nets are disallowed by bad_ip_adrs */
1459 mask = netmask | htonl(nmask);
1462 * Scan through the system's network interfaces.
1464 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1465 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1466 if (ifc.ifc_req == 0)
1468 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1469 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1472 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1473 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1475 * Check the interface's internet address.
1477 if (ifr->ifr_addr.sa_family == AF_INET) {
1478 ina = INET_ADDR(ifr->ifr_addr);
1479 if ((ntohl(ina) & nmask) != (addr & nmask))
1482 * Check that the interface is up, and not point-to-point or loopback.
1484 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1485 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1487 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1491 * Get its netmask and OR it into our mask.
1493 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1495 mask |= INET_ADDR(ifreq.ifr_addr);
1498 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1499 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1507 * have_route_to - determine if the system has any route to
1508 * a given IP address. `addr' is in network byte order.
1509 * For demand mode to work properly, we have to ignore routes
1510 * through our own interface.
1512 int have_route_to(u_int32_t addr)
1514 char buf[sizeof(struct rt_msghdr) + (sizeof(struct sockaddr_in))];
1517 struct rt_msghdr *rtm;
1518 struct sockaddr_in *sin;
1519 int msglen = sizeof(*rtm) + (sizeof(*sin));
1523 rtm = (struct rt_msghdr *)buf;
1524 memset(rtm, 0, msglen);
1525 rtm->rtm_msglen = msglen;
1526 rtm->rtm_version = RTM_VERSION;
1527 rtm->rtm_type = RTM_GET;
1528 rtm->rtm_addrs = RTA_DST;
1529 /* rtm->rtm_addrs, rtm_flags should be set on output */
1531 sin = (struct sockaddr_in *)((u_char *)rtm + sizeof(*rtm));
1532 sin->sin_len = sizeof(*sin);
1533 sin->sin_family = AF_INET;
1534 sin->sin_addr.s_addr = addr;
1538 if ((s = socket(PF_ROUTE, SOCK_RAW, 0)) < 0)
1540 if (write(s, (char *)rtm, msglen) != msglen) {
1542 return status == ESRCH? 0: -1;
1545 n = read(s, msg, 2048);
1550 rtm = (struct rt_msghdr *) msg;
1551 if (rtm->rtm_version != RTM_VERSION)
1554 /* here we try to work out if the route is through our own interface */
1555 cp = (char *)(rtm + 1);
1556 if (rtm->rtm_addrs & RTA_DST) {
1557 struct sockaddr *sa = (struct sockaddr *) cp;
1558 cp = (char *)(((unsigned long)cp + sa->sa_len
1559 + sizeof(long) - 1) & ~(sizeof(long) - 1));
1561 if (rtm->rtm_addrs & RTA_GATEWAY) {
1562 sin = (struct sockaddr_in *) cp;
1563 if (sin->sin_addr.s_addr == ifaddrs[0]
1564 || sin->sin_addr.s_addr == ifaddrs[1])
1565 return 0; /* route is through our interface */
1572 strioctl(fd, cmd, ptr, ilen, olen)
1573 int fd, cmd, ilen, olen;
1576 struct strioctl str;
1582 if (ioctl(fd, I_STR, &str) == -1)
1584 if (str.ic_len != olen)
1585 syslog(LOG_DEBUG, "strioctl: expected %d bytes, got %d for cmd %x\n",
1586 olen, str.ic_len, cmd);
1591 * Use the hostid as part of the random number seed.
1600 * Code for locking/unlocking the serial device.
1601 * This code is derived from chat.c.
1604 #if !defined(HDB) && !defined(SUNOS3)
1605 #define HDB 1 /* ascii lock files are the default */
1611 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1613 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1615 #endif /* LOCK_DIR */
1617 static char *lock_file; /* name of lock file created */
1620 * lock - create a lock file for the named device.
1626 char hdb_lock_buffer[12];
1631 if ((p = strrchr(dev, '/')) != NULL)
1633 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1634 lock_file = malloc(l);
1635 if (lock_file == NULL)
1636 novm("lock file name");
1637 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1639 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1641 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1642 /* Read the lock file to find out who has the device locked */
1644 n = read(fd, hdb_lock_buffer, 11);
1646 hdb_lock_buffer[n] = 0;
1647 pid = atoi(hdb_lock_buffer);
1650 n = read(fd, &pid, sizeof(pid));
1653 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1656 if (kill(pid, 0) == -1 && errno == ESRCH) {
1657 /* pid no longer exists - remove the lock file */
1658 if (unlink(lock_file) == 0) {
1660 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1664 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1667 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1672 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1679 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1680 write(fd, hdb_lock_buffer, 11);
1683 write(fd, &pid, sizeof pid);
1691 * unlock - remove our lockfile
1704 set_filters(pass, active)
1705 struct bpf_program *pass, *active;
1711 bpf_compile(program, buf, optimize)
1712 struct bpf_program *program;
1726 bpf_filter(pc, p, wirelen, buflen)
1727 struct bpf_insn *pc;