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 1.23 1999/03/22 05:55:38 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>
52 #include <sys/ioctl.h>
54 #include <net/if_dl.h>
55 #include <net/if_arp.h>
56 #include <net/route.h>
57 #include <net/ppp_defs.h>
58 #include <net/pppio.h>
59 #include <netinet/in.h>
60 #include <arpa/inet.h>
65 static int fdmuxid = -1;
69 static int restore_term;
70 static struct termios inittermios;
71 static struct winsize wsinfo; /* Initial window size info */
72 static pid_t tty_sid; /* PID of our session leader */
74 extern u_char inpacket_buf[]; /* borrowed from main.c */
76 static int link_mtu, link_mru;
79 static int tty_nmodules;
80 static char tty_modules[NMODULES][FMNAMESZ+1];
82 static int closed_stdio;
83 static int initfdflags = -1;
84 static int orig_ttyfd = -1;
86 static int if_is_up; /* Interface has been marked up */
87 static u_int32_t ifaddrs[2]; /* local and remote addresses */
88 static u_int32_t default_route_gateway; /* Gateway for default route added */
89 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
91 #define MAX_POLLFDS 32
92 static struct pollfd pollfds[MAX_POLLFDS];
95 /* Prototypes for procedures local to this file. */
96 static int translate_speed __P((int));
97 static int baud_rate_of __P((int));
98 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
99 static int strioctl __P((int, int, void *, int, int));
103 * sys_init - System-dependent initialization.
110 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
111 setlogmask(LOG_UPTO(LOG_INFO));
113 setlogmask(LOG_UPTO(LOG_DEBUG));
115 /* Get an internet socket for doing socket ioctl's on. */
116 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
117 fatal("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 fatal("Can't open /dev/streams/ppp: %m");
129 x = PPPDBG_LOG + PPPDBG_DRIVER;
130 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
133 /* Assign a new PPA and get its unit number. */
134 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
135 fatal("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 fatal("Can't open /dev/streams/ppp (2): %m");
144 x = PPPDBG_LOG + PPPDBG_DRIVER;
145 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
147 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0)
148 fatal("Couldn't attach ppp interface to device: %m");
149 if (ioctl(iffd, I_PUSH, "if_ppp") < 0)
150 fatal("Can't push ppp interface module: %m");
152 x = PPPDBG_LOG + PPPDBG_IF;
153 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
155 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0)
156 fatal("Couldn't create ppp interface unit: %m");
158 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0)
159 fatal("Couldn't bind ppp interface to IP SAP: %m");
165 * sys_cleanup - restore any system state we modified before exiting:
166 * mark the interface down, delete default route and/or proxy arp entry.
167 * This shouldn't call die() because it's called from die().
175 cifaddr(0, ifaddrs[0], ifaddrs[1]);
176 if (default_route_gateway)
177 cifdefaultroute(0, 0, default_route_gateway);
179 cifproxyarp(0, proxy_arp_addr);
183 * sys_close - Clean up in a child process before execing.
195 * sys_check_options - check the options that the user specified
205 * daemon - Detach us from controlling terminal session.
208 daemon(nochdir, noclose)
209 int nochdir, noclose;
213 if ((pid = fork()) < 0)
216 exit(0); /* parent dies */
221 fclose(stdin); /* don't need stdin, stdout, stderr */
229 * ppp_available - check whether the system has any ppp interfaces
236 return stat("/dev/streams/ppp", &buf) >= 0;
239 char pipename[] = "/dev/streams/pipe";
242 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
246 streampipe(int fd[2])
248 if ((fd[0]=open(pipename, O_RDWR)) == -1)
250 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
253 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
258 return(ioctl(fd[0], I_PUSH, "pipemod"));
263 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
264 * modules (but ptys are, and pipes can be).
267 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
274 int ret, fret, rret, maxfd;
275 static char buffer[BUFFSIZE];
278 if (streampipe(fdes) != 0)
279 error("streampipe(): %m\n");
280 else if (isastream(fdes[0]) == 1) {
281 if ((fret=fork()) < 0) {
282 error("fork(): %m\n");
283 } else if (fret == 0) {
284 /* Process to forward things from pipe to tty */
285 sigemptyset(&(sa.sa_mask));
286 sa.sa_handler = SIG_DFL;
288 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
289 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
290 sigaction(SIGTERM, &sa, NULL);
291 sigaction(SIGCHLD, &sa, NULL);
292 sigaction(SIGUSR1, &sa, NULL);
293 sigaction(SIGUSR2, &sa, NULL);
296 maxfd = (fdes[1]>fd)?fdes[1]:fd;
299 FD_SET(fdes[1], &readfds);
300 FD_SET(fd, &readfds);
301 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
302 if (FD_ISSET(fd, &readfds)) {
303 rret = read(fd, buffer, BUFFSIZE);
305 SYSDEBUG(("slave died: EOF on tty."));
308 write(fdes[1], buffer, rret);
311 if (FD_ISSET(fdes[1], &readfds)) {
312 rret = read(fdes[1], buffer, BUFFSIZE);
314 SYSDEBUG(("slave died: EOF on pipe."));
317 write(fd, buffer, rret);
332 * establish_ppp - Turn the serial port into a ppp interface.
340 if (isastream(fd) != 1) {
341 if ((ttyfd = fd = streamify(fd)) < 0)
342 fatal("Couldn't get a STREAMS module!\n");
345 /* Pop any existing modules off the tty stream. */
347 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
348 || ioctl(fd, I_POP, 0) < 0)
350 error("popping module %s\n", tty_modules[i]);
355 /* Push the async hdlc module and the compressor module. */
356 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0)
357 fatal("Couldn't push PPP Async HDLC module: %m");
358 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
359 error("Couldn't push PPP compression module: %m");
361 /* read mode, message non-discard mode */
362 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0)
363 fatal("ioctl(I_SRDOPT, RMSGN): %m");
365 /* Link the serial port under the PPP multiplexor. */
366 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0)
367 fatal("Can't link tty to PPP mux: %m");
369 /* close stdin, stdout, stderr if they might refer to the device */
370 if (default_device && !closed_stdio) {
373 for (i = 0; i <= 2; ++i)
374 if (i != fd && i != sockfd)
380 * Set device for non-blocking reads.
381 * XXX why do we need to do this? don't we use pppfd not fd?
383 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
384 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
385 warn("Couldn't set device to non-blocking mode: %m");
392 * restore_loop - reattach the ppp unit to the loopback.
393 * This doesn't need to do anything because disestablish_ppp does it.
401 * disestablish_ppp - Restore the serial port to normal operation.
402 * It attempts to reconstruct the stream with the previously popped
403 * modules. This shouldn't call die() because it's called from die().
412 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
414 error("Can't unlink tty from PPP mux: %m");
418 /* Reset non-blocking mode on the file descriptor. */
419 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
420 warn("Couldn't restore device fd flags: %m");
424 while (ioctl(fd, I_POP, 0) >= 0)
426 for (i = tty_nmodules - 1; i >= 0; --i)
427 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
428 error("Couldn't restore tty module %s: %m",
432 if (hungup && default_device && tty_sid > 0) {
434 * If we have received a hangup, we need to send a SIGHUP
435 * to the terminal's controlling process. The reason is
436 * that the original stream head for the terminal hasn't
437 * seen the M_HANGUP message (it went up through the ppp
438 * driver to the stream head for our fd to /dev/ppp).
440 dbglog("sending hangup to %d", tty_sid);
441 if (kill(tty_sid, SIGHUP) < 0)
442 error("couldn't kill pgrp: %m");
444 if (orig_ttyfd >= 0) {
446 (void)wait((void *)0);
454 * Check whether the link seems not to be 8-bit clean.
462 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
467 s = "bit 7 set to 1";
470 s = "bit 7 set to 0";
480 warn("Serial link is not 8-bit clean:");
481 warn("All received characters had %s", s);
486 * List of valid speeds.
489 int speed_int, speed_val;
561 * Translate from bits/second to a speed_t.
567 struct speed *speedp;
571 for (speedp = speeds; speedp->speed_int; speedp++)
572 if (bps == speedp->speed_int)
573 return speedp->speed_val;
574 warn("speed %d not supported", bps);
579 * Translate from a speed_t to bits/second.
585 struct speed *speedp;
589 for (speedp = speeds; speedp->speed_int; speedp++)
590 if (speed == speedp->speed_val)
591 return speedp->speed_int;
596 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
597 * at the requested speed, etc. If `local' is true, set CLOCAL
598 * regardless of whether the modem option was specified.
601 set_up_tty(fd, local)
607 if (tcgetattr(fd, &tios) < 0)
608 fatal("tcgetattr: %m");
612 ioctl(fd, TIOCGWINSZ, &wsinfo);
615 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
617 tios.c_cflag |= CRTSCTS;
618 else if (crtscts < 0)
619 tios.c_cflag &= ~CRTSCTS;
621 tios.c_cflag |= CS8 | CREAD | HUPCL;
623 tios.c_cflag |= CLOCAL;
624 tios.c_iflag = IGNBRK | IGNPAR;
628 tios.c_cc[VTIME] = 0;
631 tios.c_iflag |= IXON | IXOFF;
632 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
633 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
636 speed = translate_speed(inspeed);
638 cfsetospeed(&tios, speed);
639 cfsetispeed(&tios, speed);
641 speed = cfgetospeed(&tios);
643 * We can't proceed if the serial port speed is 0,
644 * since that implies that the serial port is disabled.
647 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
650 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
651 fatal("tcsetattr: %m");
653 baud_rate = inspeed = baud_rate_of(speed);
658 * restore_tty - restore the terminal to the saved settings.
665 if (!default_device) {
667 * Turn off echoing, because otherwise we can get into
668 * a loop with the tty and the modem echoing to each other.
669 * We presume we are the sole user of this tty device, so
670 * when we close it, it will revert to its defaults anyway.
672 inittermios.c_lflag &= ~(ECHO | ECHONL);
674 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
675 if (!hungup && errno != ENXIO)
676 warn("tcsetattr: %m");
677 ioctl(fd, TIOCSWINSZ, &wsinfo);
683 * setdtr - control the DTR line on the serial port.
684 * This is called from die(), so it shouldn't call die().
690 int modembits = TIOCM_DTR;
692 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
696 * open_loopback - open the device we use for getting packets
697 * in demand mode. Under Digital Unix, we use our existing fd
707 * output - Output PPP packet.
720 dbglog("sent %P", p, len);
723 data.buf = (caddr_t) p;
725 while (putmsg(pppfd, NULL, &data, 0) < 0) {
726 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
728 error("Couldn't send packet: %m");
732 pfd.events = POLLOUT;
733 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
739 * wait_input - wait until there is data available on fd,
740 * for the length of time specified by *timo (indefinite
745 struct timeval *timo;
749 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
750 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
755 * add_fd - add an fd to the set that wait_input waits for.
762 for (n = 0; n < n_pollfds; ++n)
763 if (pollfds[n].fd == fd)
765 if (n_pollfds < MAX_POLLFDS) {
766 pollfds[n_pollfds].fd = fd;
767 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
770 error("Too many inputs!");
774 * remove_fd - remove an fd from the set that wait_input waits for.
781 for (n = 0; n < n_pollfds; ++n) {
782 if (pollfds[n].fd == fd) {
783 while (++n < n_pollfds)
784 pollfds[n-1] = pollfds[n];
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)
821 * read_packet - get a PPP packet from the serial device.
827 struct strbuf ctrl, data;
829 unsigned char ctrlbuf[64];
832 data.maxlen = PPP_MRU + PPP_HDRLEN;
833 data.buf = (caddr_t) buf;
834 ctrl.maxlen = sizeof(ctrlbuf);
835 ctrl.buf = (caddr_t) ctrlbuf;
837 len = getmsg(pppfd, &ctrl, &data, &flags);
839 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
841 fatal("Error reading packet: %m");
848 * Got a M_PROTO or M_PCPROTO message. Huh?
851 dbglog("got ctrl msg len=%d", ctrl.len);
857 * get_loop_output - get outgoing packets from the ppp device,
858 * and detect when we want to bring the real link up.
859 * Return value is 1 if we need to bring up the link, 0 otherwise.
867 while ((len = read_packet(inpacket_buf)) > 0) {
868 if (loop_frame(inpacket_buf, len))
875 * ppp_send_config - configure the transmit characteristics of
879 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
887 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
888 if (hungup && errno == ENXIO)
890 error("Couldn't set MTU: %m");
892 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
893 error("Couldn't set transmit ACCM: %m");
895 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
896 cf[1] = COMP_PROT | COMP_AC;
897 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
898 error("Couldn't set prot/AC compression: %m");
903 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
906 ppp_set_xaccm(unit, accm)
910 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
911 if (!hungup || errno != ENXIO)
912 warn("Couldn't set extended ACCM: %m");
917 * ppp_recv_config - configure the receive-side characteristics of
921 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
929 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
930 if (hungup && errno == ENXIO)
932 error("Couldn't set MRU: %m");
934 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
935 error("Couldn't set receive ACCM: %m");
937 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
938 cf[1] = DECOMP_PROT | DECOMP_AC;
939 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
940 error("Couldn't set prot/AC decompression: %m");
945 * ccp_test - ask kernel whether a given compression method
946 * is acceptable for use.
948 * In Digital UNIX the memory buckets for chunks >16K are not
949 * primed when the system comes up. That means we're not
950 * likely to get the memory needed for the compressor on
951 * the first try. The way we work around this is to have
952 * the driver spin off a thread to go get the memory for us
953 * (we can't block at that point in a streams context.)
955 * This code synchronizes with the thread when it has returned
956 * with the memory we need. The driver will continue to return
957 * with EAGAIN until the thread comes back. We give up here
958 * if after 10 attempts in one second we still don't have memory.
959 * It's up to the driver to not lose track of that memory if
960 * thread takes too long to return.
963 ccp_test(unit, opt_ptr, opt_len, for_transmit)
964 int unit, opt_len, for_transmit;
971 tval.tv_usec = 100000;
972 for (i = 0; i < 10; ++i) {
973 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
974 opt_ptr, opt_len, 0) >= 0) {
982 error("hard failure trying to get memory for a compressor: %m");
983 return (errno == ENOSR)? 0: -1;
987 * ccp_flags_set - inform kernel about the current state of CCP.
990 ccp_flags_set(unit, isopen, isup)
991 int unit, isopen, isup;
995 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
996 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
997 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
998 if (!hungup || errno != ENXIO)
999 error("Couldn't set kernel CCP state: %m");
1004 * get_idle_time - return how long the link has been idle.
1007 get_idle_time(u, ip)
1009 struct ppp_idle *ip;
1011 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1015 * get_ppp_stats - return statistics for the link.
1018 get_ppp_stats(u, stats)
1020 struct pppd_stats *stats;
1024 if (strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
1025 error("Couldn't get link statistics: %m");
1028 stats->bytes_in = s.p.ppp_ibytes;
1029 stats->bytes_out = s.p.ppp_obytes;
1035 * ccp_fatal_error - returns 1 if decompression was disabled as a
1036 * result of an error detected after decompression of a packet,
1037 * 0 otherwise. This is necessary because of patent nonsense.
1040 ccp_fatal_error(unit)
1046 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1047 if (errno != ENXIO && errno != EINVAL)
1048 error("Couldn't get compression flags: %m");
1051 return cf[0] & CCP_FATALERROR;
1055 * sifvjcomp - config tcp header compression
1058 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1059 int u, vjcomp, xcidcomp, xmaxcid;
1065 maxcid[0] = xcidcomp;
1066 maxcid[1] = 15; /* XXX should be rmaxcid */
1067 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1068 error("Couldn't initialize VJ compression: %m");
1072 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1073 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1074 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1075 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1077 error("Couldn't enable VJ compression: %m");
1084 * sifup - Config the interface up and enable IP packets to pass.
1092 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1093 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1094 error("Couldn't mark interface up (get): %m");
1097 ifr.ifr_flags |= IFF_UP;
1098 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1099 error("Couldn't mark interface up (set): %m");
1107 * sifdown - Config the interface down and disable IP.
1115 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1116 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1117 error("Couldn't mark interface down (get): %m");
1120 if ((ifr.ifr_flags & IFF_UP) != 0) {
1121 ifr.ifr_flags &= ~IFF_UP;
1122 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1123 error("Couldn't mark interface down (set): %m");
1132 * sifnpmode - Set the mode for handling packets for a given NP.
1135 sifnpmode(u, proto, mode)
1143 npi[1] = (int) mode;
1144 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1145 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1151 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1154 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1156 #define SET_SA_FAMILY(addr, family) \
1157 BZERO((char *) &(addr), sizeof(addr)); \
1158 addr.sa_family = (family); \
1159 addr.sa_len = sizeof ((addr))
1162 * sifaddr - Config the interface IP addresses and netmask.
1170 struct ifaliasreq addreq;
1175 /* flush old address, if any
1177 bzero(&ifr, sizeof (ifr));
1178 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1179 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1180 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1181 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1182 && errno != EADDRNOTAVAIL) {
1183 error("ioctl(SIOCDIFADDR): %m");
1187 bzero(&addreq, sizeof (addreq));
1188 strlcpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1189 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1190 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1191 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1192 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1195 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1196 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1197 info("Setting interface mask to %s\n", ip_ntoa(m));
1200 /* install new src/dst and (possibly) netmask
1202 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1203 error("ioctl(SIOCPIFADDR): %m");
1207 ifr.ifr_metric = link_mtu;
1208 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1209 error("Couldn't set IP MTU: %m");
1220 * cifaddr - Clear the interface IP addresses, and delete routes
1221 * through the interface if possible.
1232 bzero(&ifr, sizeof (ifr));
1233 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1234 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1235 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1236 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1237 error("ioctl(SIOCDIFADDR): %m");
1245 * sifdefaultroute - assign a default route through the address given.
1248 sifdefaultroute(u, l, g)
1254 BZERO(&rt, sizeof(rt));
1255 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1256 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1257 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1258 rt.rt_flags = RTF_GATEWAY;
1259 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1260 error("default route ioctl(SIOCADDRT): %m");
1263 default_route_gateway = g;
1269 * cifdefaultroute - delete a default route through the address given.
1272 cifdefaultroute(u, l, g)
1278 BZERO(&rt, sizeof(rt));
1279 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1280 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1281 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1282 rt.rt_flags = RTF_GATEWAY;
1283 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1284 error("default route ioctl(SIOCDELRT): %m");
1287 default_route_gateway = 0;
1292 * sifproxyarp - Make a proxy ARP entry for the peer.
1295 sifproxyarp(unit, hisaddr)
1299 struct arpreq arpreq;
1301 BZERO(&arpreq, sizeof(arpreq));
1304 * Get the hardware address of an interface on the same subnet
1305 * as our local address.
1307 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1308 warn("Cannot determine ethernet address for proxy ARP");
1312 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1313 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1314 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1315 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1316 error("ioctl(SIOCSARP): %m");
1320 proxy_arp_addr = hisaddr;
1326 * cifproxyarp - Delete the proxy ARP entry for the peer.
1329 cifproxyarp(unit, hisaddr)
1333 struct arpreq arpreq;
1335 BZERO(&arpreq, sizeof(arpreq));
1336 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1337 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1338 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1339 error("ioctl(SIOCDARP): %m");
1347 * get_ether_addr - get the hardware address of an interface on the
1348 * the same subnet as ipaddr.
1353 get_ether_addr(ipaddr, hwaddr)
1355 struct sockaddr *hwaddr;
1357 struct ifreq *ifr, *ifend;
1358 u_int32_t ina, mask;
1361 struct ifreq ifs[MAX_IFS];
1362 struct ifdevea ifdevreq;
1364 ifc.ifc_len = sizeof(ifs);
1366 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1367 error("ioctl(SIOCGIFCONF): %m");
1372 * Scan through looking for an interface with an Internet
1373 * address on the same subnet as `ipaddr'.
1375 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1376 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1377 if (ifr->ifr_addr.sa_family == AF_INET) {
1380 * Check that the interface is up, and not point-to-point
1383 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1384 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1386 if ((ifreq.ifr_flags &
1387 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1388 != (IFF_UP|IFF_BROADCAST))
1392 * Get its netmask and check that it's on the right subnet.
1394 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1396 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1397 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1398 if ((ipaddr & mask) != (ina & mask))
1403 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1404 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1410 info("found interface %s for proxy arp", ifr->ifr_name);
1412 strlcpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1414 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1415 perror("ioctl(SIOCRPHYSADDR)");
1419 hwaddr->sa_family = AF_UNSPEC;
1420 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1424 #define WTMPFILE "/usr/adm/wtmp"
1427 logwtmp(line, name, host)
1428 const char *line, *name, *host;
1434 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1436 if (!fstat(fd, &buf)) {
1437 strlcpy(ut.ut_line, line, sizeof(ut.ut_line));
1438 strlcpy(ut.ut_name, name, sizeof(ut.ut_name));
1439 strlcpy(ut.ut_host, host, sizeof(ut.ut_host));
1440 (void)time(&ut.ut_time);
1441 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1442 (void)ftruncate(fd, buf.st_size);
1448 * Return user specified netmask, modified by any mask we might determine
1449 * for address `addr' (in network byte order).
1450 * Here we scan through the system's list of interfaces, looking for
1451 * any non-point-to-point interfaces which might appear to be on the same
1452 * network as `addr'. If we find any, we OR in their netmask to the
1453 * user-specified netmask.
1459 u_int32_t mask, nmask, ina;
1460 struct ifreq *ifr, *ifend, ifreq;
1464 if (IN_CLASSA(addr)) /* determine network mask for address class */
1465 nmask = IN_CLASSA_NET;
1466 else if (IN_CLASSB(addr))
1467 nmask = IN_CLASSB_NET;
1469 nmask = IN_CLASSC_NET;
1470 /* class D nets are disallowed by bad_ip_adrs */
1471 mask = netmask | htonl(nmask);
1474 * Scan through the system's network interfaces.
1476 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1477 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1478 if (ifc.ifc_req == 0)
1480 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1481 warn("Couldn't get system interface list: %m");
1484 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1485 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1487 * Check the interface's internet address.
1489 if (ifr->ifr_addr.sa_family == AF_INET) {
1490 ina = INET_ADDR(ifr->ifr_addr);
1491 if ((ntohl(ina) & nmask) != (addr & nmask))
1494 * Check that the interface is up, and not point-to-point or loopback.
1496 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1497 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1499 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1503 * Get its netmask and OR it into our mask.
1505 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1507 mask |= INET_ADDR(ifreq.ifr_addr);
1510 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1511 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1519 * have_route_to - determine if the system has any route to
1520 * a given IP address. `addr' is in network byte order.
1521 * For demand mode to work properly, we have to ignore routes
1522 * through our own interface.
1524 int have_route_to(u_int32_t addr)
1526 char buf[sizeof(struct rt_msghdr) + (sizeof(struct sockaddr_in))];
1529 struct rt_msghdr *rtm;
1530 struct sockaddr_in *sin;
1531 int msglen = sizeof(*rtm) + (sizeof(*sin));
1535 rtm = (struct rt_msghdr *)buf;
1536 memset(rtm, 0, msglen);
1537 rtm->rtm_msglen = msglen;
1538 rtm->rtm_version = RTM_VERSION;
1539 rtm->rtm_type = RTM_GET;
1540 rtm->rtm_addrs = RTA_DST;
1541 /* rtm->rtm_addrs, rtm_flags should be set on output */
1543 sin = (struct sockaddr_in *)((u_char *)rtm + sizeof(*rtm));
1544 sin->sin_len = sizeof(*sin);
1545 sin->sin_family = AF_INET;
1546 sin->sin_addr.s_addr = addr;
1550 if ((s = socket(PF_ROUTE, SOCK_RAW, 0)) < 0)
1552 if (write(s, (char *)rtm, msglen) != msglen) {
1554 return status == ESRCH? 0: -1;
1557 n = read(s, msg, 2048);
1562 rtm = (struct rt_msghdr *) msg;
1563 if (rtm->rtm_version != RTM_VERSION)
1566 /* here we try to work out if the route is through our own interface */
1567 cp = (char *)(rtm + 1);
1568 if (rtm->rtm_addrs & RTA_DST) {
1569 struct sockaddr *sa = (struct sockaddr *) cp;
1570 cp = (char *)(((unsigned long)cp + sa->sa_len
1571 + sizeof(long) - 1) & ~(sizeof(long) - 1));
1573 if (rtm->rtm_addrs & RTA_GATEWAY) {
1574 sin = (struct sockaddr_in *) cp;
1575 if (sin->sin_addr.s_addr == ifaddrs[0]
1576 || sin->sin_addr.s_addr == ifaddrs[1])
1577 return 0; /* route is through our interface */
1584 strioctl(fd, cmd, ptr, ilen, olen)
1585 int fd, cmd, ilen, olen;
1588 struct strioctl str;
1594 if (ioctl(fd, I_STR, &str) == -1)
1596 if (str.ic_len != olen)
1597 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1598 olen, str.ic_len, cmd);
1603 * Use the hostid as part of the random number seed.
1612 * Code for locking/unlocking the serial device.
1613 * This code is derived from chat.c.
1616 #if !defined(HDB) && !defined(SUNOS3)
1617 #define HDB 1 /* ascii lock files are the default */
1623 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1625 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1627 #endif /* LOCK_DIR */
1629 static char *lock_file; /* name of lock file created */
1632 * lock - create a lock file for the named device.
1638 char hdb_lock_buffer[12];
1643 if ((p = strrchr(dev, '/')) != NULL)
1645 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1646 lock_file = malloc(l);
1647 if (lock_file == NULL)
1648 novm("lock file name");
1649 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1651 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1653 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1654 /* Read the lock file to find out who has the device locked */
1656 n = read(fd, hdb_lock_buffer, 11);
1658 hdb_lock_buffer[n] = 0;
1659 pid = atoi(hdb_lock_buffer);
1662 n = read(fd, &pid, sizeof(pid));
1665 error("Can't read pid from lock file %s", lock_file);
1668 if (kill(pid, 0) == -1 && errno == ESRCH) {
1669 /* pid no longer exists - remove the lock file */
1670 if (unlink(lock_file) == 0) {
1672 notice("Removed stale lock on %s (pid %d)",
1676 warn("Couldn't remove stale lock on %s",
1679 notice("Device %s is locked by pid %d",
1684 error("Can't create lock file %s: %m", lock_file);
1691 slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
1692 write(fd, hdb_lock_buffer, 11);
1695 write(fd, &pid, sizeof pid);
1703 * unlock - remove our lockfile
1716 set_filters(pass, active)
1717 struct bpf_program *pass, *active;
1723 bpf_compile(program, buf, optimize)
1724 struct bpf_program *program;
1738 bpf_filter(pc, p, wirelen, buflen)
1739 struct bpf_insn *pc;