2 * sys-osf.c - System-dependent procedures for setting up
3 * PPP interfaces on OSF/1 systems which use the STREAMS ppp interface.
5 * Copyright (c) 1989 Carnegie Mellon University.
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 static char rcsid[] = "$Id: sys-osf.c,v 1.7 1996/01/18 03:23:04 paulus Exp $";
40 #include <sys/types.h>
41 #include <sys/socket.h>
43 #include <sys/stream.h>
44 #include <sys/stropts.h>
47 #include <net/ppp_defs.h>
48 #include <net/ppp_str.h>
49 #include <net/route.h>
50 #include <net/if_arp.h>
51 #include <netinet/in.h>
56 #define ifr_mtu ifr_metric
59 #define MAXMODULES 10 /* max number of module names to save */
60 static struct modlist {
61 char modname[FMNAMESZ+1];
62 } str_modules[MAXMODULES];
63 static int str_module_count = 0;
64 static int pushed_ppp;
65 static int closed_stdio;
67 static int restore_term; /* 1 => we've munged the terminal */
68 static struct termios inittermios; /* Initial TTY termios */
69 static struct winsize wsinfo; /* Initial window size info */
70 static int initfdflags = -1; /* Initial file descriptor flags for fd */
72 static int sockfd; /* socket for doing interface ioctls */
74 int orig_ttyfd = -1; /* Original ttyfd if we did a streamify() */
76 static int if_is_up; /* Interface has been marked up */
77 static u_int32_t default_route_gateway; /* Gateway for default route added */
78 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
80 /* Prototypes for procedures local to this file. */
81 static int translate_speed __P((int));
82 static int baud_rate_of __P((int));
83 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
87 * sys_init - System-dependent initialization.
92 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
93 setlogmask(LOG_UPTO(LOG_INFO));
95 setlogmask(LOG_UPTO(LOG_DEBUG));
97 /* Get an internet socket for doing socket ioctl's on. */
98 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
99 syslog(LOG_ERR, "Couldn't create IP socket: %m");
105 * sys_cleanup - restore any system state we modified before exiting:
106 * mark the interface down, delete default route and/or proxy arp entry.
107 * This should call die() because it's called from die().
115 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
116 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
117 && ((ifr.ifr_flags & IFF_UP) != 0)) {
118 ifr.ifr_flags &= ~IFF_UP;
119 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
123 if (default_route_gateway)
124 cifdefaultroute(0, default_route_gateway);
126 cifproxyarp(0, proxy_arp_addr);
130 * note_debug_level - note a change in the debug level.
136 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
137 setlogmask(LOG_UPTO(LOG_DEBUG));
139 setlogmask(LOG_UPTO(LOG_WARNING));
144 * daemon - Detach us from the terminal session.
147 daemon(nochdir, noclose)
148 int nochdir, noclose;
152 if ((pid = fork()) < 0)
155 exit(0); /* parent dies */
160 fclose(stdin); /* don't need stdin, stdout, stderr */
168 char pipename[] = "/dev/streams/pipe";
171 * ppp_available - check if this kernel supports PPP.
178 fd = open(pipename, O_RDONLY, 0);
180 return 0; /* can't find out - assume we don't have ppp */
181 ret = ioctl(fd, I_FIND, "pppasync") >= 0;
188 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
192 streampipe(int fd[2])
194 if ((fd[0]=open(pipename, O_RDWR)) == -1)
196 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
199 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
204 return(ioctl(fd[0], I_PUSH, "pipemod"));
209 * streamify -- Needed for DEC OSF/1, since tty devices are not STREAMS
210 * modules (but ptys are, and pipes can be).
213 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
220 int ret, fret, rret, maxfd;
221 static char buffer[BUFFSIZE];
224 if (streampipe(fdes) != 0)
225 syslog(LOG_ERR, "streampipe(): %m\n");
226 else if (isastream(fdes[0]) == 1) {
227 if ((fret=fork()) < 0) {
228 syslog(LOG_ERR, "fork(): %m\n");
229 } else if (fret == 0) {
230 /* Process to forward things from pipe to tty */
231 sigemptyset(&(sa.sa_mask));
232 sa.sa_handler = SIG_DFL;
234 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
235 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
236 sigaction(SIGTERM, &sa, NULL);
237 sigaction(SIGCHLD, &sa, NULL);
238 sigaction(SIGUSR1, &sa, NULL);
239 sigaction(SIGUSR2, &sa, NULL);
242 maxfd = (fdes[1]>fd)?fdes[1]:fd;
245 FD_SET(fdes[1], &readfds);
246 FD_SET(fd, &readfds);
247 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
248 if (FD_ISSET(fd, &readfds)) {
249 rret = read(fd, buffer, BUFFSIZE);
251 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
254 write(fdes[1], buffer, rret);
257 if (FD_ISSET(fdes[1], &readfds)) {
258 rret = read(fdes[1], buffer, BUFFSIZE);
260 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
263 write(fd, buffer, rret);
279 * establish_ppp - Turn the serial port into a ppp interface.
287 if (isastream(fd) != 1) {
288 if ((ttyfd = fd = streamify(fd)) < 0) {
289 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
294 /* go through and save the name of all the modules, then pop em */
296 if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
297 ioctl(fd, I_POP, 0) < 0)
299 MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
300 str_modules[str_module_count].modname));
304 /* now push the async/fcs module */
305 if (ioctl(fd, I_PUSH, "pppasync") < 0) {
306 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
309 /* push the compress module */
310 if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
311 syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
313 /* finally, push the ppp_if module that actually handles the */
314 /* network interface */
315 if (ioctl(fd, I_PUSH, "pppif") < 0) {
316 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
320 /* read mode, message non-discard mode */
321 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
322 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
326 * Find out which interface we were given.
327 * (ppp_if handles this ioctl)
329 if (ioctl(fd, (int)SIOCGETU, &ifunit) < 0) {
330 syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
334 /* Set debug flags in driver */
335 if (ioctl(fd, (int)SIOCSIFDEBUG, &kdebugflag) < 0) {
336 syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
339 /* close stdin, stdout, stderr if they might refer to the device */
340 if (default_device && !closed_stdio) {
343 for (i = 0; i <= 2; ++i)
344 if (i != fd && i != sockfd)
350 * Set device for non-blocking reads.
352 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
353 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
354 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
358 /* Debugging routine.... */
360 void prstrstack(int fd)
363 struct str_mlist names[20];
366 sl.sl_modlist = names;
368 ret = ioctl(fd, I_LIST, &sl);
371 MAINDEBUG((LOG_DEBUG, "Current streams modules:\n"));
372 for (i=0; i<sl.sl_nmods; i++)
373 MAINDEBUG((LOG_DEBUG," %s\n", names[i].l_name));
375 MAINDEBUG((LOG_DEBUG,"I_LIST ioctl() failed.\n"));
381 * disestablish_ppp - Restore the serial port to normal operation.
382 * It attempts to reconstruct the stream with the previously popped
383 * modules. This shouldn't call die() because it's called from die().
392 /* Reset non-blocking mode on the file descriptor. */
393 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
394 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
398 /* we can't push or pop modules after the stream has hung up */
399 str_module_count = 0;
400 restore_term = 0; /* nor can we fix up terminal settings */
405 while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
409 for (; str_module_count > 0; str_module_count--) {
410 if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
412 syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
413 str_modules[str_module_count-1].modname);
415 MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
416 str_modules[str_module_count-1].modname));
420 if (orig_ttyfd >= 0) {
430 * clean_check - check whether the link seems to be 8-bit clean.
437 * Check whether the link seems not to be 8-bit clean.
439 if (ioctl(ttyfd, (int)SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
441 switch (~flags & PAI_FLAGS_HIBITS) {
443 s = "bit 7 set to 1";
446 s = "bit 7 set to 0";
448 case PAI_FLAGS_PAR_EVEN:
451 case PAI_FLAGS_PAR_ODD:
456 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
457 syslog(LOG_WARNING, "All received characters had %s", s);
464 * List of valid speeds.
467 int speed_int, speed_val;
539 * Translate from bits/second to a speed_t.
545 struct speed *speedp;
549 for (speedp = speeds; speedp->speed_int; speedp++)
550 if (bps == speedp->speed_int)
551 return speedp->speed_val;
552 syslog(LOG_WARNING, "speed %d not supported", bps);
557 * Translate from a speed_t to bits/second.
563 struct speed *speedp;
567 for (speedp = speeds; speedp->speed_int; speedp++)
568 if (speed == speedp->speed_val)
569 return speedp->speed_int;
574 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
575 * at the requested speed, etc. If `local' is true, set CLOCAL
576 * regardless of whether the modem option was specified.
579 set_up_tty(fd, local)
585 if (tcgetattr(fd, &tios) < 0) {
586 syslog(LOG_ERR, "tcgetattr: %m");
592 ioctl(fd, TIOCGWINSZ, &wsinfo);
595 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
597 tios.c_cflag |= CRTSCTS;
598 else if (crtscts < 0)
599 tios.c_cflag &= ~CRTSCTS;
601 tios.c_cflag |= CS8 | CREAD | HUPCL;
603 tios.c_cflag |= CLOCAL;
604 tios.c_iflag = IGNBRK | IGNPAR;
608 tios.c_cc[VTIME] = 0;
611 tios.c_iflag |= IXON | IXOFF;
612 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
613 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
616 speed = translate_speed(inspeed);
618 cfsetospeed(&tios, speed);
619 cfsetispeed(&tios, speed);
621 speed = cfgetospeed(&tios);
623 * We can't proceed if the serial port speed is B0,
624 * since that implies that the serial port is disabled.
627 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
633 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
634 syslog(LOG_ERR, "tcsetattr: %m");
638 baud_rate = inspeed = baud_rate_of(speed);
643 * restore_tty - restore the terminal to the saved settings.
650 if (!default_device) {
652 * Turn off echoing, because otherwise we can get into
653 * a loop with the tty and the modem echoing to each other.
654 * We presume we are the sole user of this tty device, so
655 * when we close it, it will revert to its defaults anyway.
657 inittermios.c_lflag &= ~(ECHO | ECHONL);
659 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
661 syslog(LOG_WARNING, "tcsetattr: %m");
662 ioctl(fd, TIOCSWINSZ, &wsinfo);
668 * setdtr - control the DTR line on the serial port.
669 * This is called from die(), so it shouldn't call die().
675 int modembits = TIOCM_DTR;
677 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
682 * output - Output PPP packet.
695 log_packet(p, len, "sent ");
698 str.buf = (caddr_t) p;
700 while (putmsg(ttyfd, NULL, &str, 0) < 0) {
701 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
703 syslog(LOG_ERR, "Couldn't send packet: %m");
707 pfd.events = POLLOUT;
708 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
713 * wait_input - wait for input, for a length of time specified in *timo.
717 struct timeval *timo;
722 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
724 pfd.events = POLLIN | POLLPRI | POLLHUP;
725 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
726 syslog(LOG_ERR, "poll: %m");
732 * read_packet - get a PPP packet from the serial device.
738 struct strbuf str, ctl;
740 unsigned char ctlbuf[16];
742 str.maxlen = PPP_MTU + PPP_HDRLEN;
743 str.buf = (caddr_t) buf;
744 ctl.maxlen = sizeof(ctlbuf);
745 ctl.buf = (caddr_t) ctlbuf;
747 len = getmsg(ttyfd, &ctl, &str, &i);
749 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
752 syslog(LOG_ERR, "getmsg %m");
756 MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
758 syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
759 ctlbuf[0], ctlbuf[1]);
762 MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
771 * ppp_send_config - configure the transmit characteristics of
775 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
783 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
785 if (ioctl(sockfd, (int)SIOCSIPMTU, (caddr_t) &ifr) < 0) {
786 syslog(LOG_ERR, "ioctl(SIOCSIPMTU): %m");
790 if(ioctl(ttyfd, (int)SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
791 syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
796 if(ioctl(ttyfd, (int)SIOCSIFCOMPPROT, &c) < 0) {
797 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
802 if(ioctl(ttyfd, (int)SIOCSIFCOMPAC, &c) < 0) {
803 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
810 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
813 ppp_set_xaccm(unit, accm)
817 if (ioctl(ttyfd, (int)SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
818 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
823 * ppp_recv_config - configure the receive-side characteristics of
827 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
834 if (ioctl(ttyfd, (int)SIOCSIFMRU, &mru) < 0) {
835 syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
838 if (ioctl(ttyfd, (int)SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
839 syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
842 c = 2 + (pcomp? 1: 0);
843 if(ioctl(ttyfd, (int)SIOCSIFCOMPPROT, &c) < 0) {
844 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
847 c = 2 + (accomp? 1: 0);
848 if (ioctl(ttyfd, (int)SIOCSIFCOMPAC, &c) < 0) {
849 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
854 * ccp_test - ask kernel whether a given compression method
855 * is acceptable for use.
858 ccp_test(unit, opt_ptr, opt_len, for_transmit)
859 int unit, opt_len, for_transmit;
862 struct ppp_option_data data;
864 if ((unsigned) opt_len > MAX_PPP_OPTION)
865 opt_len = MAX_PPP_OPTION;
866 data.length = opt_len;
867 data.transmit = for_transmit;
868 BCOPY(opt_ptr, data.opt_data, opt_len);
869 if (ioctl(ttyfd, (int)SIOCSCOMPRESS, (caddr_t) &data) >= 0)
871 return (errno == ENOSR)? 0: -1;
875 * ccp_flags_set - inform kernel about the current state of CCP.
878 ccp_flags_set(unit, isopen, isup)
879 int unit, isopen, isup;
883 x = (isopen? 1: 0) + (isup? 2: 0);
884 if (ioctl(ttyfd, (int)SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY)
885 syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
889 * ccp_fatal_error - returns 1 if decompression was disabled as a
890 * result of an error detected after decompression of a packet,
891 * 0 otherwise. This is necessary because of patent nonsense.
894 ccp_fatal_error(unit)
899 if (ioctl(ttyfd, (int)SIOCGIFCOMP, (caddr_t) &x) < 0) {
900 syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
903 return x & CCP_FATALERROR;
907 * sifvjcomp - config tcp header compression
910 sifvjcomp(u, vjcomp, cidcomp, maxcid)
911 int u, vjcomp, cidcomp, maxcid;
915 x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
916 if (ioctl(ttyfd, (int)SIOCSIFVJCOMP, (caddr_t) &x) < 0) {
917 syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
924 * sifup - Config the interface up and enable IP packets to pass.
933 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
934 if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
935 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
938 ifr.ifr_flags |= IFF_UP;
939 if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
940 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
944 npi.protocol = PPP_IP;
945 npi.mode = NPMODE_PASS;
946 if (ioctl(ttyfd, (int)SIOCSETNPMODE, &npi) < 0) {
947 if (errno != ENOTTY) {
948 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
956 * sifdown - Config the interface down.
967 npi.protocol = PPP_IP;
968 npi.mode = NPMODE_ERROR;
969 if (ioctl(ttyfd, (int)SIOCSETNPMODE, (caddr_t) &npi) < 0) {
970 if (errno != ENOTTY) {
971 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
976 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
977 if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
978 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
981 ifr.ifr_flags &= ~IFF_UP;
982 if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
983 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
992 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
994 #define SET_SA_FAMILY(addr, family) \
995 BZERO((char *) &(addr), sizeof(addr)); \
996 addr.sa_family = (family);
999 * sifaddr - Config the interface IP addresses and netmask.
1010 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1011 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1012 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1013 if (ioctl(sockfd, (int)SIOCSIFADDR, (caddr_t) &ifr) < 0) {
1014 syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
1017 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
1018 if (ioctl(sockfd, (int)SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
1019 syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
1023 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
1024 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1025 if (ioctl(sockfd, (int)SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
1026 syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
1031 /* Reset if address --- This is stupid, but seems to be necessary... */
1033 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1034 if (ioctl(sockfd, (int)SIOCSIFADDR, (caddr_t) &ifr) < 0) {
1035 syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
1043 * cifaddr - Clear the interface IP addresses, and delete routes
1044 * through the interface if possible.
1053 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1054 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
1055 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1056 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
1057 rt.rt_flags = RTF_HOST;
1058 if (ioctl(sockfd, (int)SIOCDELRT, (caddr_t) &rt) < 0) {
1059 syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
1066 * sifdefaultroute - assign a default route through the address given.
1069 sifdefaultroute(u, g)
1075 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1076 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1077 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1078 rt.rt_flags = RTF_GATEWAY;
1079 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1080 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1083 default_route_gateway = g;
1088 * cifdefaultroute - delete a default route through the address given.
1091 cifdefaultroute(u, g)
1097 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1098 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1099 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1100 rt.rt_flags = RTF_GATEWAY;
1101 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1102 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1105 default_route_gateway = 0;
1110 * sifproxyarp - Make a proxy ARP entry for the peer.
1113 sifproxyarp(unit, hisaddr)
1117 struct arpreq arpreq;
1119 BZERO(&arpreq, sizeof(arpreq));
1122 * Get the hardware address of an interface on the same subnet
1123 * as our local address.
1125 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1126 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1130 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1131 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1132 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1133 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1134 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1138 proxy_arp_addr = hisaddr;
1143 * cifproxyarp - Delete the proxy ARP entry for the peer.
1146 cifproxyarp(unit, hisaddr)
1150 struct arpreq arpreq;
1152 BZERO(&arpreq, sizeof(arpreq));
1153 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1154 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1155 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1156 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1164 * get_ether_addr - get the hardware address of an interface on the
1165 * the same subnet as ipaddr.
1172 get_ether_addr(ipaddr, hwaddr)
1174 struct sockaddr *hwaddr;
1176 struct ifreq *ifr, *ifend, *ifp;
1178 struct sockaddr_dl *dla;
1181 struct ifreq ifs[MAX_IFS];
1182 struct ifdevea ifdevreq;
1184 ifc.ifc_len = sizeof(ifs);
1186 if (ioctl(sockfd, (int)SIOCGIFCONF, &ifc) < 0) {
1187 perror("ioctl(SIOCGIFCONF)");
1192 * Scan through looking for an interface with an Internet
1193 * address on the same subnet as `ipaddr'.
1195 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1196 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1197 if (ifr->ifr_addr.sa_family == AF_INET) {
1198 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1199 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1201 * Check that the interface is up, and not point-to-point
1204 if (ioctl(sockfd, (int)SIOCGIFFLAGS, &ifreq) < 0)
1206 if ((ifreq.ifr_flags &
1207 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1208 != (IFF_UP|IFF_BROADCAST))
1211 * Get its netmask and check that it's on the right subnet.
1213 if (ioctl(sockfd, (int)SIOCGIFNETMASK, &ifreq) < 0)
1215 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1216 if ((ipaddr & mask) != (ina & mask))
1225 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1227 strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1229 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1230 perror("ioctl(SIOCRPHYSADDR)");
1234 hwaddr->sa_family = AF_UNSPEC;
1235 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1241 * Return user specified netmask, modified by any mask we might determine
1242 * for address `addr' (in network byte order).
1243 * Here we scan through the system's list of interfaces, looking for
1244 * any non-point-to-point interfaces which might appear to be on the same
1245 * network as `addr'. If we find any, we OR in their netmask to the
1246 * user-specified netmask.
1252 u_int32_t mask, nmask, ina;
1253 struct ifreq *ifr, *ifend, ifreq;
1255 struct ifreq ifs[MAX_IFS];
1258 if (IN_CLASSA(addr)) /* determine network mask for address class */
1259 nmask = IN_CLASSA_NET;
1260 else if (IN_CLASSB(addr))
1261 nmask = IN_CLASSB_NET;
1263 nmask = IN_CLASSC_NET;
1264 /* class D nets are disallowed by bad_ip_adrs */
1265 mask = netmask | htonl(nmask);
1268 * Scan through the system's network interfaces.
1270 ifc.ifc_len = sizeof(ifs);
1272 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1273 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1276 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1277 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1279 * Check the interface's internet address.
1281 if (ifr->ifr_addr.sa_family != AF_INET)
1283 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1284 if ((ntohl(ina) & nmask) != (addr & nmask))
1287 * Check that the interface is up, and not point-to-point or loopback.
1289 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1290 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1292 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1296 * Get its netmask and OR it into our mask.
1298 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1300 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1307 #define WTMPFILE "/usr/adm/wtmp"
1308 #include <sys/stat.h>
1311 logwtmp(line, name, host)
1312 char *line, *name, *host;
1318 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1320 if (!fstat(fd, &buf)) {
1321 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1322 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1323 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1324 (void)time(&ut.ut_time);
1325 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1326 (void)ftruncate(fd, buf.st_size);
1332 * Code for locking/unlocking the serial device.
1333 * This code is derived from chat.c.
1339 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1341 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1343 #endif /* LOCK_DIR */
1345 static char *lock_file;
1348 * lock - create a lock file for the named device
1354 char hdb_lock_buffer[12];
1358 if ((p = strrchr(dev, '/')) != NULL)
1360 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1361 if (lock_file == NULL)
1362 novm("lock file name");
1363 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1365 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1367 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1368 /* Read the lock file to find out who has the device locked */
1370 n = read(fd, hdb_lock_buffer, 11);
1372 hdb_lock_buffer[n] = 0;
1373 pid = atoi(hdb_lock_buffer);
1376 n = read(fd, &pid, sizeof(pid));
1379 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1382 if (kill(pid, 0) == -1 && errno == ESRCH) {
1383 /* pid no longer exists - remove the lock file */
1384 if (unlink(lock_file) == 0) {
1386 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1390 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1393 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1398 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1405 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1406 write(fd, hdb_lock_buffer, 11);
1409 write(fd, &pid, sizeof pid);
1417 * unlock - remove our lockfile