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 1.16 1999/03/08 04:49:12 paulus Exp $";
45 #include <sys/types.h>
46 #include <sys/param.h>
47 #include <sys/socket.h>
48 #include <sys/stream.h>
49 #include <sys/stropts.h>
50 #include <sys/syslog.h>
54 #include <sys/ioctl.h>
56 #include <net/if_dl.h>
57 #include <net/if_arp.h>
58 #include <net/route.h>
59 #include <net/ppp_defs.h>
60 #include <net/pppio.h>
61 #include <netinet/in.h>
62 #include <arpa/inet.h>
67 static int fdmuxid = -1;
71 static int restore_term;
72 static struct termios inittermios;
73 static struct winsize wsinfo; /* Initial window size info */
74 static pid_t tty_sid; /* PID of our session leader */
76 extern u_char inpacket_buf[]; /* borrowed from main.c */
78 static int link_mtu, link_mru;
81 static int tty_nmodules;
82 static char tty_modules[NMODULES][FMNAMESZ+1];
84 static int closed_stdio;
85 static int initfdflags = -1;
86 static int orig_ttyfd = -1;
88 static int if_is_up; /* Interface has been marked up */
89 static u_int32_t ifaddrs[2]; /* local and remote addresses */
90 static u_int32_t default_route_gateway; /* Gateway for default route added */
91 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
93 /* Prototypes for procedures local to this file. */
94 static int translate_speed __P((int));
95 static int baud_rate_of __P((int));
96 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
97 static int strioctl __P((int, int, void *, int, int));
101 * sys_init - System-dependent initialization.
108 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
109 setlogmask(LOG_UPTO(LOG_INFO));
111 setlogmask(LOG_UPTO(LOG_DEBUG));
113 /* Get an internet socket for doing socket ioctl's on. */
114 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
115 syslog(LOG_ERR, "Couldn't create IP socket: %m");
120 tty_sid = getsid((pid_t)0);
123 * Open the ppp device.
125 pppfd = open("/dev/streams/ppp", O_RDWR | O_NONBLOCK, 0);
127 syslog(LOG_ERR, "Can't open /dev/streams/ppp: %m");
131 x = PPPDBG_LOG + PPPDBG_DRIVER;
132 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
135 /* Assign a new PPA and get its unit number. */
136 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
137 syslog(LOG_ERR, "Can't create new PPP interface: %m");
142 * Open the ppp device again and push the if_ppp module on it.
144 iffd = open("/dev/streams/ppp", O_RDWR, 0);
146 syslog(LOG_ERR, "Can't open /dev/streams/ppp (2): %m");
150 x = PPPDBG_LOG + PPPDBG_DRIVER;
151 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
153 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
154 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
157 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
158 syslog(LOG_ERR, "Can't push ppp interface module: %m");
162 x = PPPDBG_LOG + PPPDBG_IF;
163 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
165 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
166 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
170 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
171 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
177 * sys_cleanup - restore any system state we modified before exiting:
178 * mark the interface down, delete default route and/or proxy arp entry.
179 * This shouldn't call die() because it's called from die().
187 cifaddr(0, ifaddrs[0], ifaddrs[1]);
188 if (default_route_gateway)
189 cifdefaultroute(0, 0, default_route_gateway);
191 cifproxyarp(0, proxy_arp_addr);
195 * sys_close - Clean up in a child process before execing.
207 * sys_check_options - check the options that the user specified
217 * daemon - Detach us from controlling terminal session.
220 daemon(nochdir, noclose)
221 int nochdir, noclose;
225 if ((pid = fork()) < 0)
228 exit(0); /* parent dies */
233 fclose(stdin); /* don't need stdin, stdout, stderr */
241 * note_debug_level - note a change in the debug level.
247 setlogmask(LOG_UPTO(LOG_DEBUG));
249 setlogmask(LOG_UPTO(LOG_WARNING));
254 * ppp_available - check whether the system has any ppp interfaces
261 return stat("/dev/streams/ppp", &buf) >= 0;
264 char pipename[] = "/dev/streams/pipe";
267 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
271 streampipe(int fd[2])
273 if ((fd[0]=open(pipename, O_RDWR)) == -1)
275 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
278 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
283 return(ioctl(fd[0], I_PUSH, "pipemod"));
288 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
289 * modules (but ptys are, and pipes can be).
292 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
299 int ret, fret, rret, maxfd;
300 static char buffer[BUFFSIZE];
303 if (streampipe(fdes) != 0)
304 syslog(LOG_ERR, "streampipe(): %m\n");
305 else if (isastream(fdes[0]) == 1) {
306 if ((fret=fork()) < 0) {
307 syslog(LOG_ERR, "fork(): %m\n");
308 } else if (fret == 0) {
309 /* Process to forward things from pipe to tty */
310 sigemptyset(&(sa.sa_mask));
311 sa.sa_handler = SIG_DFL;
313 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
314 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
315 sigaction(SIGTERM, &sa, NULL);
316 sigaction(SIGCHLD, &sa, NULL);
317 sigaction(SIGUSR1, &sa, NULL);
318 sigaction(SIGUSR2, &sa, NULL);
321 maxfd = (fdes[1]>fd)?fdes[1]:fd;
324 FD_SET(fdes[1], &readfds);
325 FD_SET(fd, &readfds);
326 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
327 if (FD_ISSET(fd, &readfds)) {
328 rret = read(fd, buffer, BUFFSIZE);
330 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
333 write(fdes[1], buffer, rret);
336 if (FD_ISSET(fdes[1], &readfds)) {
337 rret = read(fdes[1], buffer, BUFFSIZE);
339 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
342 write(fd, buffer, rret);
357 * establish_ppp - Turn the serial port into a ppp interface.
365 if (isastream(fd) != 1) {
366 if ((ttyfd = fd = streamify(fd)) < 0) {
367 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
372 /* Pop any existing modules off the tty stream. */
374 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
375 || ioctl(fd, I_POP, 0) < 0)
377 syslog(LOG_ERR, "popping module %s\n", tty_modules[i]);
382 /* Push the async hdlc module and the compressor module. */
383 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
384 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
387 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
388 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
392 /* read mode, message non-discard mode */
393 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
394 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
398 /* Link the serial port under the PPP multiplexor. */
399 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
400 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
404 /* close stdin, stdout, stderr if they might refer to the device */
405 if (default_device && !closed_stdio) {
408 for (i = 0; i <= 2; ++i)
409 if (i != fd && i != sockfd)
415 * Set device for non-blocking reads.
417 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
418 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
419 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
424 * restore_loop - reattach the ppp unit to the loopback.
425 * This doesn't need to do anything because disestablish_ppp does it.
433 * disestablish_ppp - Restore the serial port to normal operation.
434 * It attempts to reconstruct the stream with the previously popped
435 * modules. This shouldn't call die() because it's called from die().
444 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
446 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
450 /* Reset non-blocking mode on the file descriptor. */
451 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
452 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
456 while (ioctl(fd, I_POP, 0) >= 0)
458 for (i = tty_nmodules - 1; i >= 0; --i)
459 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
460 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
464 if (hungup && default_device && tty_sid > 0) {
466 * If we have received a hangup, we need to send a SIGHUP
467 * to the terminal's controlling process. The reason is
468 * that the original stream head for the terminal hasn't
469 * seen the M_HANGUP message (it went up through the ppp
470 * driver to the stream head for our fd to /dev/ppp).
472 syslog(LOG_DEBUG, "sending hangup to %d", tty_sid);
473 if (kill(tty_sid, SIGHUP) < 0)
474 syslog(LOG_ERR, "couldn't kill pgrp: %m");
476 if (orig_ttyfd >= 0) {
478 (void)wait((void *)0);
486 * Check whether the link seems not to be 8-bit clean.
494 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
499 s = "bit 7 set to 1";
502 s = "bit 7 set to 0";
512 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
513 syslog(LOG_WARNING, "All received characters had %s", s);
518 * List of valid speeds.
521 int speed_int, speed_val;
593 * Translate from bits/second to a speed_t.
599 struct speed *speedp;
603 for (speedp = speeds; speedp->speed_int; speedp++)
604 if (bps == speedp->speed_int)
605 return speedp->speed_val;
606 syslog(LOG_WARNING, "speed %d not supported", bps);
611 * Translate from a speed_t to bits/second.
617 struct speed *speedp;
621 for (speedp = speeds; speedp->speed_int; speedp++)
622 if (speed == speedp->speed_val)
623 return speedp->speed_int;
628 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
629 * at the requested speed, etc. If `local' is true, set CLOCAL
630 * regardless of whether the modem option was specified.
633 set_up_tty(fd, local)
639 if (tcgetattr(fd, &tios) < 0) {
640 syslog(LOG_ERR, "tcgetattr: %m");
646 ioctl(fd, TIOCGWINSZ, &wsinfo);
649 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
651 tios.c_cflag |= CRTSCTS;
652 else if (crtscts < 0)
653 tios.c_cflag &= ~CRTSCTS;
655 tios.c_cflag |= CS8 | CREAD | HUPCL;
657 tios.c_cflag |= CLOCAL;
658 tios.c_iflag = IGNBRK | IGNPAR;
662 tios.c_cc[VTIME] = 0;
665 tios.c_iflag |= IXON | IXOFF;
666 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
667 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
670 speed = translate_speed(inspeed);
672 cfsetospeed(&tios, speed);
673 cfsetispeed(&tios, speed);
675 speed = cfgetospeed(&tios);
677 * We can't proceed if the serial port speed is 0,
678 * since that implies that the serial port is disabled.
681 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
687 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
688 syslog(LOG_ERR, "tcsetattr: %m");
692 baud_rate = inspeed = baud_rate_of(speed);
697 * restore_tty - restore the terminal to the saved settings.
704 if (!default_device) {
706 * Turn off echoing, because otherwise we can get into
707 * a loop with the tty and the modem echoing to each other.
708 * We presume we are the sole user of this tty device, so
709 * when we close it, it will revert to its defaults anyway.
711 inittermios.c_lflag &= ~(ECHO | ECHONL);
713 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
714 if (!hungup && errno != ENXIO)
715 syslog(LOG_WARNING, "tcsetattr: %m");
716 ioctl(fd, TIOCSWINSZ, &wsinfo);
722 * setdtr - control the DTR line on the serial port.
723 * This is called from die(), so it shouldn't call die().
729 int modembits = TIOCM_DTR;
731 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
735 * open_loopback - open the device we use for getting packets
736 * in demand mode. Under Solaris 2, we use our existing fd
745 * output - Output PPP packet.
758 log_packet(p, len, "sent ", LOG_DEBUG);
761 data.buf = (caddr_t) p;
763 while (putmsg(pppfd, NULL, &data, 0) < 0) {
764 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
766 syslog(LOG_ERR, "Couldn't send packet: %m");
770 pfd.events = POLLOUT;
771 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
777 * wait_input - wait until there is data available on fd,
778 * for the length of time specified by *timo (indefinite
783 struct timeval *timo;
788 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
790 pfd.events = POLLIN | POLLPRI | POLLHUP;
791 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
792 syslog(LOG_ERR, "poll: %m");
798 * wait_loop_output - wait until there is data available on the
799 * loopback, for the length of time specified by *timo (indefinite
803 wait_loop_output(timo)
804 struct timeval *timo;
810 * wait_time - wait for a given length of time or until a
811 * signal is received.
815 struct timeval *timo;
819 n = select(0, NULL, NULL, NULL, timo);
820 if (n < 0 && errno != EINTR) {
821 syslog(LOG_ERR, "select: %m");
828 * read_packet - get a PPP packet from the serial device.
834 struct strbuf ctrl, data;
836 unsigned char ctrlbuf[64];
839 data.maxlen = PPP_MRU + PPP_HDRLEN;
840 data.buf = (caddr_t) buf;
841 ctrl.maxlen = sizeof(ctrlbuf);
842 ctrl.buf = (caddr_t) ctrlbuf;
844 len = getmsg(pppfd, &ctrl, &data, &flags);
846 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
848 syslog(LOG_ERR, "Error reading packet: %m");
856 * Got a M_PROTO or M_PCPROTO message. Huh?
859 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
865 * get_loop_output - get outgoing packets from the ppp device,
866 * and detect when we want to bring the real link up.
867 * Return value is 1 if we need to bring up the link, 0 otherwise.
875 while ((len = read_packet(inpacket_buf)) > 0) {
876 if (loop_frame(inpacket_buf, len))
883 * ppp_send_config - configure the transmit characteristics of
887 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
895 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
896 if (hungup && errno == ENXIO)
898 syslog(LOG_ERR, "Couldn't set MTU: %m");
900 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
901 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
903 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
904 cf[1] = COMP_PROT | COMP_AC;
905 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
906 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
911 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
914 ppp_set_xaccm(unit, accm)
918 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
919 if (!hungup || errno != ENXIO)
920 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
925 * ppp_recv_config - configure the receive-side characteristics of
929 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
937 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
938 if (hungup && errno == ENXIO)
940 syslog(LOG_ERR, "Couldn't set MRU: %m");
942 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
943 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
945 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
946 cf[1] = DECOMP_PROT | DECOMP_AC;
947 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
948 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
953 * ccp_test - ask kernel whether a given compression method
954 * is acceptable for use.
956 * In Digital UNIX the memory buckets for chunks >16K are not
957 * primed when the system comes up. That means we're not
958 * likely to get the memory needed for the compressor on
959 * the first try. The way we work around this is to have
960 * the driver spin off a thread to go get the memory for us
961 * (we can't block at that point in a streams context.)
963 * This code synchronizes with the thread when it has returned
964 * with the memory we need. The driver will continue to return
965 * with EAGAIN until the thread comes back. We give up here
966 * if after 10 attempts in one second we still don't have memory.
967 * It's up to the driver to not lose track of that memory if
968 * thread takes too long to return.
971 ccp_test(unit, opt_ptr, opt_len, for_transmit)
972 int unit, opt_len, for_transmit;
979 tval.tv_usec = 100000;
980 for (i = 0; i < 10; ++i) {
981 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
982 opt_ptr, opt_len, 0) >= 0) {
990 syslog(LOG_ERR, "hard failure trying to get memory for a compressor: %m");
991 return (errno == ENOSR)? 0: -1;
995 * ccp_flags_set - inform kernel about the current state of CCP.
998 ccp_flags_set(unit, isopen, isup)
999 int unit, isopen, isup;
1003 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1004 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1005 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1006 if (!hungup || errno != ENXIO)
1007 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
1012 * get_idle_time - return how long the link has been idle.
1015 get_idle_time(u, ip)
1017 struct ppp_idle *ip;
1019 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1024 * ccp_fatal_error - returns 1 if decompression was disabled as a
1025 * result of an error detected after decompression of a packet,
1026 * 0 otherwise. This is necessary because of patent nonsense.
1029 ccp_fatal_error(unit)
1035 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1036 if (errno != ENXIO && errno != EINVAL)
1037 syslog(LOG_ERR, "Couldn't get compression flags: %m");
1040 return cf[0] & CCP_FATALERROR;
1044 * sifvjcomp - config tcp header compression
1047 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1048 int u, vjcomp, xcidcomp, xmaxcid;
1054 maxcid[0] = xcidcomp;
1055 maxcid[1] = 15; /* XXX should be rmaxcid */
1056 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1057 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
1061 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1062 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1063 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1064 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1066 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
1073 * sifup - Config the interface up and enable IP packets to pass.
1081 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1082 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1083 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
1086 ifr.ifr_flags |= IFF_UP;
1087 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1088 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
1096 * sifdown - Config the interface down and disable IP.
1104 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1105 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1106 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
1109 if ((ifr.ifr_flags & IFF_UP) != 0) {
1110 ifr.ifr_flags &= ~IFF_UP;
1111 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1112 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
1121 * sifnpmode - Set the mode for handling packets for a given NP.
1124 sifnpmode(u, proto, mode)
1132 npi[1] = (int) mode;
1133 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1134 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
1140 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1143 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1145 #define SET_SA_FAMILY(addr, family) \
1146 BZERO((char *) &(addr), sizeof(addr)); \
1147 addr.sa_family = (family); \
1148 addr.sa_len = sizeof ((addr))
1151 * sifaddr - Config the interface IP addresses and netmask.
1159 struct ifaliasreq addreq;
1164 /* flush old address, if any
1166 bzero(&ifr, sizeof (ifr));
1167 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1168 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1169 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1170 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1171 && errno != EADDRNOTAVAIL) {
1172 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1176 bzero(&addreq, sizeof (addreq));
1177 strncpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1178 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1179 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1180 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1181 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1184 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1185 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1186 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1189 /* install new src/dst and (possibly) netmask
1191 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1192 syslog(LOG_ERR, "ioctl(SIOCPIFADDR): %m");
1196 ifr.ifr_metric = link_mtu;
1197 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1198 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
1209 * cifaddr - Clear the interface IP addresses, and delete routes
1210 * through the interface if possible.
1221 bzero(&ifr, sizeof (ifr));
1222 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1223 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1224 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1225 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1226 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1234 * sifdefaultroute - assign a default route through the address given.
1237 sifdefaultroute(u, l, g)
1243 BZERO(&rt, sizeof(rt));
1244 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1245 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1246 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1247 rt.rt_flags = RTF_GATEWAY;
1248 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1249 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1252 default_route_gateway = g;
1258 * cifdefaultroute - delete a default route through the address given.
1261 cifdefaultroute(u, l, g)
1267 BZERO(&rt, sizeof(rt));
1268 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1269 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1270 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1271 rt.rt_flags = RTF_GATEWAY;
1272 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1273 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1276 default_route_gateway = 0;
1281 * sifproxyarp - Make a proxy ARP entry for the peer.
1284 sifproxyarp(unit, hisaddr)
1288 struct arpreq arpreq;
1290 BZERO(&arpreq, sizeof(arpreq));
1293 * Get the hardware address of an interface on the same subnet
1294 * as our local address.
1296 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1297 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1301 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1302 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1303 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1304 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1305 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1309 proxy_arp_addr = hisaddr;
1315 * cifproxyarp - Delete the proxy ARP entry for the peer.
1318 cifproxyarp(unit, hisaddr)
1322 struct arpreq arpreq;
1324 BZERO(&arpreq, sizeof(arpreq));
1325 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1326 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1327 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1328 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1336 * get_ether_addr - get the hardware address of an interface on the
1337 * the same subnet as ipaddr.
1342 get_ether_addr(ipaddr, hwaddr)
1344 struct sockaddr *hwaddr;
1346 struct ifreq *ifr, *ifend;
1347 u_int32_t ina, mask;
1350 struct ifreq ifs[MAX_IFS];
1351 struct ifdevea ifdevreq;
1353 ifc.ifc_len = sizeof(ifs);
1355 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1356 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1361 * Scan through looking for an interface with an Internet
1362 * address on the same subnet as `ipaddr'.
1364 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1365 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1366 if (ifr->ifr_addr.sa_family == AF_INET) {
1369 * Check that the interface is up, and not point-to-point
1372 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1373 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1375 if ((ifreq.ifr_flags &
1376 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1377 != (IFF_UP|IFF_BROADCAST))
1381 * Get its netmask and check that it's on the right subnet.
1383 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1385 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1386 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1387 if ((ipaddr & mask) != (ina & mask))
1392 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1393 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1399 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1401 strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1403 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1404 perror("ioctl(SIOCRPHYSADDR)");
1408 hwaddr->sa_family = AF_UNSPEC;
1409 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1413 #define WTMPFILE "/usr/adm/wtmp"
1416 logwtmp(line, name, host)
1417 const char *line, *name, *host;
1423 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1425 if (!fstat(fd, &buf)) {
1426 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1427 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1428 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1429 (void)time(&ut.ut_time);
1430 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1431 (void)ftruncate(fd, buf.st_size);
1437 * Return user specified netmask, modified by any mask we might determine
1438 * for address `addr' (in network byte order).
1439 * Here we scan through the system's list of interfaces, looking for
1440 * any non-point-to-point interfaces which might appear to be on the same
1441 * network as `addr'. If we find any, we OR in their netmask to the
1442 * user-specified netmask.
1448 u_int32_t mask, nmask, ina;
1449 struct ifreq *ifr, *ifend, ifreq;
1453 if (IN_CLASSA(addr)) /* determine network mask for address class */
1454 nmask = IN_CLASSA_NET;
1455 else if (IN_CLASSB(addr))
1456 nmask = IN_CLASSB_NET;
1458 nmask = IN_CLASSC_NET;
1459 /* class D nets are disallowed by bad_ip_adrs */
1460 mask = netmask | htonl(nmask);
1463 * Scan through the system's network interfaces.
1465 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1466 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1467 if (ifc.ifc_req == 0)
1469 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1470 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1473 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1474 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1476 * Check the interface's internet address.
1478 if (ifr->ifr_addr.sa_family == AF_INET) {
1479 ina = INET_ADDR(ifr->ifr_addr);
1480 if ((ntohl(ina) & nmask) != (addr & nmask))
1483 * Check that the interface is up, and not point-to-point or loopback.
1485 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1486 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1488 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1492 * Get its netmask and OR it into our mask.
1494 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1496 mask |= INET_ADDR(ifreq.ifr_addr);
1499 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1500 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1508 * have_route_to - determine if the system has any route to
1509 * a given IP address. `addr' is in network byte order.
1510 * For demand mode to work properly, we have to ignore routes
1511 * through our own interface.
1513 int have_route_to(u_int32_t addr)
1515 char buf[sizeof(struct rt_msghdr) + (sizeof(struct sockaddr_in))];
1518 struct rt_msghdr *rtm;
1519 struct sockaddr_in *sin;
1520 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];
1630 if ((p = strrchr(dev, '/')) != NULL)
1632 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1633 if (lock_file == NULL)
1634 novm("lock file name");
1635 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1637 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1639 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1640 /* Read the lock file to find out who has the device locked */
1642 n = read(fd, hdb_lock_buffer, 11);
1644 hdb_lock_buffer[n] = 0;
1645 pid = atoi(hdb_lock_buffer);
1648 n = read(fd, &pid, sizeof(pid));
1651 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1654 if (kill(pid, 0) == -1 && errno == ESRCH) {
1655 /* pid no longer exists - remove the lock file */
1656 if (unlink(lock_file) == 0) {
1658 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1662 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1665 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1670 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1677 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1678 write(fd, hdb_lock_buffer, 11);
1681 write(fd, &pid, sizeof pid);
1689 * unlock - remove our lockfile
1702 set_filters(pass, active)
1703 struct bpf_program *pass, *active;
1709 bpf_compile(program, buf, optimize)
1710 struct bpf_program *program;
1724 bpf_filter(pc, p, wirelen, buflen)
1725 struct bpf_insn *pc;