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 1.20 1999/03/16 22:53:48 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 * note_debug_level - note a change in the debug level.
235 setlogmask(LOG_UPTO(LOG_DEBUG));
237 setlogmask(LOG_UPTO(LOG_WARNING));
242 * ppp_available - check whether the system has any ppp interfaces
249 return stat("/dev/streams/ppp", &buf) >= 0;
252 char pipename[] = "/dev/streams/pipe";
255 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
259 streampipe(int fd[2])
261 if ((fd[0]=open(pipename, O_RDWR)) == -1)
263 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
266 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
271 return(ioctl(fd[0], I_PUSH, "pipemod"));
276 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
277 * modules (but ptys are, and pipes can be).
280 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
287 int ret, fret, rret, maxfd;
288 static char buffer[BUFFSIZE];
291 if (streampipe(fdes) != 0)
292 error("streampipe(): %m\n");
293 else if (isastream(fdes[0]) == 1) {
294 if ((fret=fork()) < 0) {
295 error("fork(): %m\n");
296 } else if (fret == 0) {
297 /* Process to forward things from pipe to tty */
298 sigemptyset(&(sa.sa_mask));
299 sa.sa_handler = SIG_DFL;
301 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
302 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
303 sigaction(SIGTERM, &sa, NULL);
304 sigaction(SIGCHLD, &sa, NULL);
305 sigaction(SIGUSR1, &sa, NULL);
306 sigaction(SIGUSR2, &sa, NULL);
309 maxfd = (fdes[1]>fd)?fdes[1]:fd;
312 FD_SET(fdes[1], &readfds);
313 FD_SET(fd, &readfds);
314 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
315 if (FD_ISSET(fd, &readfds)) {
316 rret = read(fd, buffer, BUFFSIZE);
318 SYSDEBUG(("slave died: EOF on tty."));
321 write(fdes[1], buffer, rret);
324 if (FD_ISSET(fdes[1], &readfds)) {
325 rret = read(fdes[1], buffer, BUFFSIZE);
327 SYSDEBUG(("slave died: EOF on pipe."));
330 write(fd, buffer, rret);
345 * establish_ppp - Turn the serial port into a ppp interface.
353 if (isastream(fd) != 1) {
354 if ((ttyfd = fd = streamify(fd)) < 0)
355 fatal("Couldn't get a STREAMS module!\n");
358 /* Pop any existing modules off the tty stream. */
360 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
361 || ioctl(fd, I_POP, 0) < 0)
363 error("popping module %s\n", tty_modules[i]);
368 /* Push the async hdlc module and the compressor module. */
369 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0)
370 fatal("Couldn't push PPP Async HDLC module: %m");
371 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
372 error("Couldn't push PPP compression module: %m");
374 /* read mode, message non-discard mode */
375 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0)
376 fatal("ioctl(I_SRDOPT, RMSGN): %m");
378 /* Link the serial port under the PPP multiplexor. */
379 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0)
380 fatal("Can't link tty to PPP mux: %m");
382 /* close stdin, stdout, stderr if they might refer to the device */
383 if (default_device && !closed_stdio) {
386 for (i = 0; i <= 2; ++i)
387 if (i != fd && i != sockfd)
393 * Set device for non-blocking reads.
394 * XXX why do we need to do this? don't we use pppfd not fd?
396 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
397 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
398 warn("Couldn't set device to non-blocking mode: %m");
405 * restore_loop - reattach the ppp unit to the loopback.
406 * This doesn't need to do anything because disestablish_ppp does it.
414 * disestablish_ppp - Restore the serial port to normal operation.
415 * It attempts to reconstruct the stream with the previously popped
416 * modules. This shouldn't call die() because it's called from die().
425 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
427 error("Can't unlink tty from PPP mux: %m");
431 /* Reset non-blocking mode on the file descriptor. */
432 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
433 warn("Couldn't restore device fd flags: %m");
437 while (ioctl(fd, I_POP, 0) >= 0)
439 for (i = tty_nmodules - 1; i >= 0; --i)
440 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
441 error("Couldn't restore tty module %s: %m",
445 if (hungup && default_device && tty_sid > 0) {
447 * If we have received a hangup, we need to send a SIGHUP
448 * to the terminal's controlling process. The reason is
449 * that the original stream head for the terminal hasn't
450 * seen the M_HANGUP message (it went up through the ppp
451 * driver to the stream head for our fd to /dev/ppp).
453 dbglog("sending hangup to %d", tty_sid);
454 if (kill(tty_sid, SIGHUP) < 0)
455 error("couldn't kill pgrp: %m");
457 if (orig_ttyfd >= 0) {
459 (void)wait((void *)0);
467 * Check whether the link seems not to be 8-bit clean.
475 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
480 s = "bit 7 set to 1";
483 s = "bit 7 set to 0";
493 warn("Serial link is not 8-bit clean:");
494 warn("All received characters had %s", s);
499 * List of valid speeds.
502 int speed_int, speed_val;
574 * Translate from bits/second to a speed_t.
580 struct speed *speedp;
584 for (speedp = speeds; speedp->speed_int; speedp++)
585 if (bps == speedp->speed_int)
586 return speedp->speed_val;
587 warn("speed %d not supported", bps);
592 * Translate from a speed_t to bits/second.
598 struct speed *speedp;
602 for (speedp = speeds; speedp->speed_int; speedp++)
603 if (speed == speedp->speed_val)
604 return speedp->speed_int;
609 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
610 * at the requested speed, etc. If `local' is true, set CLOCAL
611 * regardless of whether the modem option was specified.
614 set_up_tty(fd, local)
620 if (tcgetattr(fd, &tios) < 0)
621 fatal("tcgetattr: %m");
625 ioctl(fd, TIOCGWINSZ, &wsinfo);
628 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
630 tios.c_cflag |= CRTSCTS;
631 else if (crtscts < 0)
632 tios.c_cflag &= ~CRTSCTS;
634 tios.c_cflag |= CS8 | CREAD | HUPCL;
636 tios.c_cflag |= CLOCAL;
637 tios.c_iflag = IGNBRK | IGNPAR;
641 tios.c_cc[VTIME] = 0;
644 tios.c_iflag |= IXON | IXOFF;
645 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
646 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
649 speed = translate_speed(inspeed);
651 cfsetospeed(&tios, speed);
652 cfsetispeed(&tios, speed);
654 speed = cfgetospeed(&tios);
656 * We can't proceed if the serial port speed is 0,
657 * since that implies that the serial port is disabled.
660 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
663 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
664 fatal("tcsetattr: %m");
666 baud_rate = inspeed = baud_rate_of(speed);
671 * restore_tty - restore the terminal to the saved settings.
678 if (!default_device) {
680 * Turn off echoing, because otherwise we can get into
681 * a loop with the tty and the modem echoing to each other.
682 * We presume we are the sole user of this tty device, so
683 * when we close it, it will revert to its defaults anyway.
685 inittermios.c_lflag &= ~(ECHO | ECHONL);
687 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
688 if (!hungup && errno != ENXIO)
689 warn("tcsetattr: %m");
690 ioctl(fd, TIOCSWINSZ, &wsinfo);
696 * setdtr - control the DTR line on the serial port.
697 * This is called from die(), so it shouldn't call die().
703 int modembits = TIOCM_DTR;
705 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
709 * open_loopback - open the device we use for getting packets
710 * in demand mode. Under Digital Unix, we use our existing fd
720 * output - Output PPP packet.
733 dbglog("sent %P", p, len);
736 data.buf = (caddr_t) p;
738 while (putmsg(pppfd, NULL, &data, 0) < 0) {
739 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
741 error("Couldn't send packet: %m");
745 pfd.events = POLLOUT;
746 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
752 * wait_input - wait until there is data available on fd,
753 * for the length of time specified by *timo (indefinite
758 struct timeval *timo;
762 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
763 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
768 * add_fd - add an fd to the set that wait_input waits for.
774 for (n = 0; n < n_pollfds; ++n)
775 if (pollfds[n].fd == fd)
777 if (n_pollfds < MAX_POLLFDS) {
778 pollfds[n_pollfds].fd = fd;
779 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
782 error("Too many inputs!");
786 * remove_fd - remove an fd from the set that wait_input waits for.
788 void remove_fd(int fd)
792 for (n = 0; n < n_pollfds; ++n) {
793 if (pollfds[n].fd == fd) {
794 while (++n < n_pollfds)
795 pollfds[n-1] = pollfds[n];
804 * wait_loop_output - wait until there is data available on the
805 * loopback, for the length of time specified by *timo (indefinite
809 wait_loop_output(timo)
810 struct timeval *timo;
816 * wait_time - wait for a given length of time or until a
817 * signal is received.
821 struct timeval *timo;
825 n = select(0, NULL, NULL, NULL, timo);
826 if (n < 0 && errno != EINTR)
832 * read_packet - get a PPP packet from the serial device.
838 struct strbuf ctrl, data;
840 unsigned char ctrlbuf[64];
843 data.maxlen = PPP_MRU + PPP_HDRLEN;
844 data.buf = (caddr_t) buf;
845 ctrl.maxlen = sizeof(ctrlbuf);
846 ctrl.buf = (caddr_t) ctrlbuf;
848 len = getmsg(pppfd, &ctrl, &data, &flags);
850 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
852 fatal("Error reading packet: %m");
859 * Got a M_PROTO or M_PCPROTO message. Huh?
862 dbglog("got ctrl msg len=%d", ctrl.len);
868 * get_loop_output - get outgoing packets from the ppp device,
869 * and detect when we want to bring the real link up.
870 * Return value is 1 if we need to bring up the link, 0 otherwise.
878 while ((len = read_packet(inpacket_buf)) > 0) {
879 if (loop_frame(inpacket_buf, len))
886 * ppp_send_config - configure the transmit characteristics of
890 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
898 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
899 if (hungup && errno == ENXIO)
901 error("Couldn't set MTU: %m");
903 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
904 error("Couldn't set transmit ACCM: %m");
906 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
907 cf[1] = COMP_PROT | COMP_AC;
908 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
909 error("Couldn't set prot/AC compression: %m");
914 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
917 ppp_set_xaccm(unit, accm)
921 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
922 if (!hungup || errno != ENXIO)
923 warn("Couldn't set extended ACCM: %m");
928 * ppp_recv_config - configure the receive-side characteristics of
932 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
940 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
941 if (hungup && errno == ENXIO)
943 error("Couldn't set MRU: %m");
945 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
946 error("Couldn't set receive ACCM: %m");
948 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
949 cf[1] = DECOMP_PROT | DECOMP_AC;
950 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
951 error("Couldn't set prot/AC decompression: %m");
956 * ccp_test - ask kernel whether a given compression method
957 * is acceptable for use.
959 * In Digital UNIX the memory buckets for chunks >16K are not
960 * primed when the system comes up. That means we're not
961 * likely to get the memory needed for the compressor on
962 * the first try. The way we work around this is to have
963 * the driver spin off a thread to go get the memory for us
964 * (we can't block at that point in a streams context.)
966 * This code synchronizes with the thread when it has returned
967 * with the memory we need. The driver will continue to return
968 * with EAGAIN until the thread comes back. We give up here
969 * if after 10 attempts in one second we still don't have memory.
970 * It's up to the driver to not lose track of that memory if
971 * thread takes too long to return.
974 ccp_test(unit, opt_ptr, opt_len, for_transmit)
975 int unit, opt_len, for_transmit;
982 tval.tv_usec = 100000;
983 for (i = 0; i < 10; ++i) {
984 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
985 opt_ptr, opt_len, 0) >= 0) {
993 error("hard failure trying to get memory for a compressor: %m");
994 return (errno == ENOSR)? 0: -1;
998 * ccp_flags_set - inform kernel about the current state of CCP.
1001 ccp_flags_set(unit, isopen, isup)
1002 int unit, isopen, isup;
1006 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1007 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1008 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1009 if (!hungup || errno != ENXIO)
1010 error("Couldn't set kernel CCP state: %m");
1015 * get_idle_time - return how long the link has been idle.
1018 get_idle_time(u, ip)
1020 struct ppp_idle *ip;
1022 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1027 * ccp_fatal_error - returns 1 if decompression was disabled as a
1028 * result of an error detected after decompression of a packet,
1029 * 0 otherwise. This is necessary because of patent nonsense.
1032 ccp_fatal_error(unit)
1038 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1039 if (errno != ENXIO && errno != EINVAL)
1040 error("Couldn't get compression flags: %m");
1043 return cf[0] & CCP_FATALERROR;
1047 * sifvjcomp - config tcp header compression
1050 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1051 int u, vjcomp, xcidcomp, xmaxcid;
1057 maxcid[0] = xcidcomp;
1058 maxcid[1] = 15; /* XXX should be rmaxcid */
1059 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1060 error("Couldn't initialize VJ compression: %m");
1064 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1065 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1066 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1067 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1069 error("Couldn't enable VJ compression: %m");
1076 * sifup - Config the interface up and enable IP packets to pass.
1084 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
1085 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1086 error("Couldn't mark interface up (get): %m");
1089 ifr.ifr_flags |= IFF_UP;
1090 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1091 error("Couldn't mark interface up (set): %m");
1099 * sifdown - Config the interface down and disable IP.
1107 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
1108 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1109 error("Couldn't mark interface down (get): %m");
1112 if ((ifr.ifr_flags & IFF_UP) != 0) {
1113 ifr.ifr_flags &= ~IFF_UP;
1114 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1115 error("Couldn't mark interface down (set): %m");
1124 * sifnpmode - Set the mode for handling packets for a given NP.
1127 sifnpmode(u, proto, mode)
1135 npi[1] = (int) mode;
1136 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1137 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1143 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1146 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1148 #define SET_SA_FAMILY(addr, family) \
1149 BZERO((char *) &(addr), sizeof(addr)); \
1150 addr.sa_family = (family); \
1151 addr.sa_len = sizeof ((addr))
1154 * sifaddr - Config the interface IP addresses and netmask.
1162 struct ifaliasreq addreq;
1167 /* flush old address, if any
1169 bzero(&ifr, sizeof (ifr));
1170 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
1171 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1172 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1173 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1174 && errno != EADDRNOTAVAIL) {
1175 error("ioctl(SIOCDIFADDR): %m");
1179 bzero(&addreq, sizeof (addreq));
1180 strlcpy(addreq.ifra_name, sizeof (addreq.ifra_name), ifname);
1181 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1182 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1183 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1184 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1187 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1188 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1189 info("Setting interface mask to %s\n", ip_ntoa(m));
1192 /* install new src/dst and (possibly) netmask
1194 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1195 error("ioctl(SIOCPIFADDR): %m");
1199 ifr.ifr_metric = link_mtu;
1200 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1201 error("Couldn't set IP MTU: %m");
1212 * cifaddr - Clear the interface IP addresses, and delete routes
1213 * through the interface if possible.
1224 bzero(&ifr, sizeof (ifr));
1225 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
1226 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1227 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1228 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1229 error("ioctl(SIOCDIFADDR): %m");
1237 * sifdefaultroute - assign a default route through the address given.
1240 sifdefaultroute(u, l, g)
1246 BZERO(&rt, sizeof(rt));
1247 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1248 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1249 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1250 rt.rt_flags = RTF_GATEWAY;
1251 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1252 error("default route ioctl(SIOCADDRT): %m");
1255 default_route_gateway = g;
1261 * cifdefaultroute - delete a default route through the address given.
1264 cifdefaultroute(u, l, g)
1270 BZERO(&rt, sizeof(rt));
1271 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1272 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1273 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1274 rt.rt_flags = RTF_GATEWAY;
1275 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1276 error("default route ioctl(SIOCDELRT): %m");
1279 default_route_gateway = 0;
1284 * sifproxyarp - Make a proxy ARP entry for the peer.
1287 sifproxyarp(unit, hisaddr)
1291 struct arpreq arpreq;
1293 BZERO(&arpreq, sizeof(arpreq));
1296 * Get the hardware address of an interface on the same subnet
1297 * as our local address.
1299 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1300 warn("Cannot determine ethernet address for proxy ARP");
1304 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1305 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1306 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1307 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1308 error("ioctl(SIOCSARP): %m");
1312 proxy_arp_addr = hisaddr;
1318 * cifproxyarp - Delete the proxy ARP entry for the peer.
1321 cifproxyarp(unit, hisaddr)
1325 struct arpreq arpreq;
1327 BZERO(&arpreq, sizeof(arpreq));
1328 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1329 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1330 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1331 error("ioctl(SIOCDARP): %m");
1339 * get_ether_addr - get the hardware address of an interface on the
1340 * the same subnet as ipaddr.
1345 get_ether_addr(ipaddr, hwaddr)
1347 struct sockaddr *hwaddr;
1349 struct ifreq *ifr, *ifend;
1350 u_int32_t ina, mask;
1353 struct ifreq ifs[MAX_IFS];
1354 struct ifdevea ifdevreq;
1356 ifc.ifc_len = sizeof(ifs);
1358 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1359 error("ioctl(SIOCGIFCONF): %m");
1364 * Scan through looking for an interface with an Internet
1365 * address on the same subnet as `ipaddr'.
1367 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1368 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1369 if (ifr->ifr_addr.sa_family == AF_INET) {
1372 * Check that the interface is up, and not point-to-point
1375 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1376 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1378 if ((ifreq.ifr_flags &
1379 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1380 != (IFF_UP|IFF_BROADCAST))
1384 * Get its netmask and check that it's on the right subnet.
1386 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1388 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1389 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1390 if ((ipaddr & mask) != (ina & mask))
1395 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1396 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1402 info("found interface %s for proxy arp", ifr->ifr_name);
1404 strlcpy(ifdevreq.ifr_name, sizeof(ifdevreq.ifr_name), ifr->ifr_name);
1406 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1407 perror("ioctl(SIOCRPHYSADDR)");
1411 hwaddr->sa_family = AF_UNSPEC;
1412 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1416 #define WTMPFILE "/usr/adm/wtmp"
1419 logwtmp(line, name, host)
1420 const char *line, *name, *host;
1426 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1428 if (!fstat(fd, &buf)) {
1429 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1430 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1431 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1432 (void)time(&ut.ut_time);
1433 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1434 (void)ftruncate(fd, buf.st_size);
1440 * Return user specified netmask, modified by any mask we might determine
1441 * for address `addr' (in network byte order).
1442 * Here we scan through the system's list of interfaces, looking for
1443 * any non-point-to-point interfaces which might appear to be on the same
1444 * network as `addr'. If we find any, we OR in their netmask to the
1445 * user-specified netmask.
1451 u_int32_t mask, nmask, ina;
1452 struct ifreq *ifr, *ifend, ifreq;
1456 if (IN_CLASSA(addr)) /* determine network mask for address class */
1457 nmask = IN_CLASSA_NET;
1458 else if (IN_CLASSB(addr))
1459 nmask = IN_CLASSB_NET;
1461 nmask = IN_CLASSC_NET;
1462 /* class D nets are disallowed by bad_ip_adrs */
1463 mask = netmask | htonl(nmask);
1466 * Scan through the system's network interfaces.
1468 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1469 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1470 if (ifc.ifc_req == 0)
1472 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1473 warn("Couldn't get system interface list: %m");
1476 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1477 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1479 * Check the interface's internet address.
1481 if (ifr->ifr_addr.sa_family == AF_INET) {
1482 ina = INET_ADDR(ifr->ifr_addr);
1483 if ((ntohl(ina) & nmask) != (addr & nmask))
1486 * Check that the interface is up, and not point-to-point or loopback.
1488 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1489 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1491 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1495 * Get its netmask and OR it into our mask.
1497 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1499 mask |= INET_ADDR(ifreq.ifr_addr);
1502 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1503 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1511 * have_route_to - determine if the system has any route to
1512 * a given IP address. `addr' is in network byte order.
1513 * For demand mode to work properly, we have to ignore routes
1514 * through our own interface.
1516 int have_route_to(u_int32_t addr)
1518 char buf[sizeof(struct rt_msghdr) + (sizeof(struct sockaddr_in))];
1521 struct rt_msghdr *rtm;
1522 struct sockaddr_in *sin;
1523 int msglen = sizeof(*rtm) + (sizeof(*sin));
1527 rtm = (struct rt_msghdr *)buf;
1528 memset(rtm, 0, msglen);
1529 rtm->rtm_msglen = msglen;
1530 rtm->rtm_version = RTM_VERSION;
1531 rtm->rtm_type = RTM_GET;
1532 rtm->rtm_addrs = RTA_DST;
1533 /* rtm->rtm_addrs, rtm_flags should be set on output */
1535 sin = (struct sockaddr_in *)((u_char *)rtm + sizeof(*rtm));
1536 sin->sin_len = sizeof(*sin);
1537 sin->sin_family = AF_INET;
1538 sin->sin_addr.s_addr = addr;
1542 if ((s = socket(PF_ROUTE, SOCK_RAW, 0)) < 0)
1544 if (write(s, (char *)rtm, msglen) != msglen) {
1546 return status == ESRCH? 0: -1;
1549 n = read(s, msg, 2048);
1554 rtm = (struct rt_msghdr *) msg;
1555 if (rtm->rtm_version != RTM_VERSION)
1558 /* here we try to work out if the route is through our own interface */
1559 cp = (char *)(rtm + 1);
1560 if (rtm->rtm_addrs & RTA_DST) {
1561 struct sockaddr *sa = (struct sockaddr *) cp;
1562 cp = (char *)(((unsigned long)cp + sa->sa_len
1563 + sizeof(long) - 1) & ~(sizeof(long) - 1));
1565 if (rtm->rtm_addrs & RTA_GATEWAY) {
1566 sin = (struct sockaddr_in *) cp;
1567 if (sin->sin_addr.s_addr == ifaddrs[0]
1568 || sin->sin_addr.s_addr == ifaddrs[1])
1569 return 0; /* route is through our interface */
1576 strioctl(fd, cmd, ptr, ilen, olen)
1577 int fd, cmd, ilen, olen;
1580 struct strioctl str;
1586 if (ioctl(fd, I_STR, &str) == -1)
1588 if (str.ic_len != olen)
1589 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1590 olen, str.ic_len, cmd);
1595 * Use the hostid as part of the random number seed.
1604 * Code for locking/unlocking the serial device.
1605 * This code is derived from chat.c.
1608 #if !defined(HDB) && !defined(SUNOS3)
1609 #define HDB 1 /* ascii lock files are the default */
1615 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1617 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1619 #endif /* LOCK_DIR */
1621 static char *lock_file; /* name of lock file created */
1624 * lock - create a lock file for the named device.
1630 char hdb_lock_buffer[12];
1635 if ((p = strrchr(dev, '/')) != NULL)
1637 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1638 lock_file = malloc(l);
1639 if (lock_file == NULL)
1640 novm("lock file name");
1641 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1643 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1645 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1646 /* Read the lock file to find out who has the device locked */
1648 n = read(fd, hdb_lock_buffer, 11);
1650 hdb_lock_buffer[n] = 0;
1651 pid = atoi(hdb_lock_buffer);
1654 n = read(fd, &pid, sizeof(pid));
1657 error("Can't read pid from lock file %s", lock_file);
1660 if (kill(pid, 0) == -1 && errno == ESRCH) {
1661 /* pid no longer exists - remove the lock file */
1662 if (unlink(lock_file) == 0) {
1664 notice("Removed stale lock on %s (pid %d)",
1668 warn("Couldn't remove stale lock on %s",
1671 notice("Device %s is locked by pid %d",
1676 error("Can't create lock file %s: %m", lock_file);
1683 slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
1684 write(fd, hdb_lock_buffer, 11);
1687 write(fd, &pid, sizeof pid);
1695 * unlock - remove our lockfile
1708 set_filters(pass, active)
1709 struct bpf_program *pass, *active;
1715 bpf_compile(program, buf, optimize)
1716 struct bpf_program *program;
1730 bpf_filter(pc, p, wirelen, buflen)
1731 struct bpf_insn *pc;