2 * System-dependent procedures for pppd under SunOS 4.
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-sunos4.c,v 1.1 1995/10/27 03:54:02 paulus Exp $";
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <sys/sockio.h>
48 #include <sys/stream.h>
49 #include <sys/stropts.h>
50 #include <sys/syslog.h>
55 #include <net/if_arp.h>
56 #include <net/nit_if.h>
57 #include <net/route.h>
58 #include <net/ppp_defs.h>
59 #include <net/pppio.h>
60 #include <netinet/in.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 parent_pid; /* PID of our parent */
74 static int link_mtu, link_mru;
77 static int tty_nmodules;
78 static char tty_modules[NMODULES][FMNAMESZ+1];
80 static int if_is_up; /* Interface has been marked up */
81 static u_int32_t default_route_gateway; /* Gateway for default route added */
82 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
84 /* Prototypes for procedures local to this file. */
85 static int translate_speed __P((int));
86 static int baud_rate_of __P((int));
87 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
88 static int strioctl __P((int, int, void *, int, int));
92 * sys_init - System-dependent initialization.
97 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
98 setlogmask(LOG_UPTO(LOG_INFO));
100 setlogmask(LOG_UPTO(LOG_DEBUG));
102 /* Get an internet socket for doing socket ioctl's on. */
103 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
104 syslog(LOG_ERR, "Couldn't create IP socket: %m");
109 * We may want to send a SIGHUP to the session leader associated
110 * with our controlling terminal later. Because SunOS doesn't
111 * have getsid(), we make do with sending the signal to our
114 parent_pid = getppid();
118 * sys_cleanup - restore any system state we modified before exiting:
119 * mark the interface down, delete default route and/or proxy arp entry.
120 * This should call die() because it's called from die().
129 if (default_route_gateway)
130 cifdefaultroute(0, default_route_gateway);
132 cifproxyarp(0, proxy_arp_addr);
136 * daemon - Detach us from controlling terminal session.
139 daemon(nochdir, noclose)
140 int nochdir, noclose;
144 if ((pid = fork()) < 0)
147 exit(0); /* parent dies */
152 fclose(stdin); /* don't need stdin, stdout, stderr */
160 * note_debug_level - note a change in the debug level.
166 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
167 setlogmask(LOG_UPTO(LOG_DEBUG));
169 setlogmask(LOG_UPTO(LOG_WARNING));
174 * ppp_available - check whether the system has any ppp interfaces
181 return stat("/dev/ppp", &buf) >= 0;
185 * establish_ppp - Turn the serial port into a ppp interface.
193 pppfd = open("/dev/ppp", O_RDWR | O_NONBLOCK, 0);
195 syslog(LOG_ERR, "Can't open /dev/ppp: %m");
199 x = PPPDBG_LOG + PPPDBG_DRIVER;
200 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
203 /* Assign a new PPA and get its unit number. */
204 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
205 syslog(LOG_ERR, "Can't create new PPP interface: %m");
210 * Open the ppp device again and push the if_ppp module on it.
212 iffd = open("/dev/ppp", O_RDWR, 0);
214 syslog(LOG_ERR, "Can't open /dev/ppp (2): %m");
218 x = PPPDBG_LOG + PPPDBG_DRIVER;
219 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
221 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
222 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
225 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
226 syslog(LOG_ERR, "Can't push ppp interface module: %m");
230 x = PPPDBG_LOG + PPPDBG_IF;
231 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
233 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
234 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
238 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
239 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
243 /* Pop any existing modules off the tty stream. */
245 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
246 || ioctl(fd, I_POP, 0) < 0)
250 /* Push the async hdlc module and the compressor module. */
251 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
252 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
255 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
256 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
260 /* Link the serial port under the PPP multiplexor. */
261 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
262 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
269 i = read(fd, buf, PPP_MRU);
270 syslog(LOG_DEBUG, "read %d bytes from fd", i);
275 * disestablish_ppp - Restore the serial port to normal operation.
276 * This shouldn't call die() because it's called from die().
284 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
286 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
291 while (ioctl(fd, I_POP, 0) >= 0)
293 for (i = tty_nmodules - 1; i >= 0; --i)
294 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
295 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
298 if (hungup && default_device && parent_pid > 0) {
300 * If we have received a hangup, we need to send a SIGHUP
301 * to the terminal's controlling process. The reason is
302 * that the original stream head for the terminal hasn't
303 * seen the M_HANGUP message (it went up through the ppp
304 * driver to the stream head for our fd to /dev/ppp).
305 * Actually we send the signal to the process that invoked
306 * pppd, since SunOS doesn't have getsid().
308 kill(parent_pid, SIGHUP);
314 * List of valid speeds.
317 int speed_int, speed_val;
389 * Translate from bits/second to a speed_t.
395 struct speed *speedp;
399 for (speedp = speeds; speedp->speed_int; speedp++)
400 if (bps == speedp->speed_int)
401 return speedp->speed_val;
402 syslog(LOG_WARNING, "speed %d not supported", bps);
407 * Translate from a speed_t to bits/second.
413 struct speed *speedp;
417 for (speedp = speeds; speedp->speed_int; speedp++)
418 if (speed == speedp->speed_val)
419 return speedp->speed_int;
424 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
425 * at the requested speed, etc. If `local' is true, set CLOCAL
426 * regardless of whether the modem option was specified.
429 set_up_tty(fd, local)
435 if (tcgetattr(fd, &tios) < 0) {
436 syslog(LOG_ERR, "tcgetattr: %m");
442 ioctl(fd, TIOCGWINSZ, &wsinfo);
445 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
447 tios.c_cflag |= CRTSCTS;
448 else if (crtscts < 0)
449 tios.c_cflag &= ~CRTSCTS;
451 tios.c_cflag |= CS8 | CREAD | HUPCL;
453 tios.c_cflag |= CLOCAL;
454 tios.c_iflag = IGNBRK | IGNPAR;
458 tios.c_cc[VTIME] = 0;
461 tios.c_iflag |= IXON | IXOFF;
462 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
463 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
466 speed = translate_speed(inspeed);
468 cfsetospeed(&tios, speed);
469 cfsetispeed(&tios, speed);
471 speed = cfgetospeed(&tios);
473 * We can't proceed if the serial port speed is 0,
474 * since that implies that the serial port is disabled.
477 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
483 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
484 syslog(LOG_ERR, "tcsetattr: %m");
488 baud_rate = inspeed = baud_rate_of(speed);
493 * restore_tty - restore the terminal to the saved settings.
499 if (!default_device) {
501 * Turn off echoing, because otherwise we can get into
502 * a loop with the tty and the modem echoing to each other.
503 * We presume we are the sole user of this tty device, so
504 * when we close it, it will revert to its defaults anyway.
506 inittermios.c_lflag &= ~(ECHO | ECHONL);
508 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
509 if (!hungup && errno != ENXIO)
510 syslog(LOG_WARNING, "tcsetattr: %m");
511 ioctl(fd, TIOCSWINSZ, &wsinfo);
517 * setdtr - control the DTR line on the serial port.
518 * This is called from die(), so it shouldn't call die().
524 int modembits = TIOCM_DTR;
526 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
530 * output - Output PPP packet.
543 log_packet(p, len, "sent ");
546 data.buf = (caddr_t) p;
547 while (putmsg(pppfd, NULL, &data, 0) < 0) {
548 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
550 syslog(LOG_ERR, "Couldn't send packet: %m");
554 pfd.events = POLLOUT;
555 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
560 * wait_input - wait until there is data available on fd,
561 * for the length of time specified by *timo (indefinite
566 struct timeval *timo;
571 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
573 pfd.events = POLLIN | POLLPRI | POLLHUP;
574 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
575 syslog(LOG_ERR, "poll: %m");
581 * read_packet - get a PPP packet from the serial device.
587 struct strbuf ctrl, data;
589 unsigned char ctrlbuf[64];
592 data.maxlen = PPP_MRU + PPP_HDRLEN;
593 data.buf = (caddr_t) buf;
594 ctrl.maxlen = sizeof(ctrlbuf);
595 ctrl.buf = (caddr_t) ctrlbuf;
597 len = getmsg(pppfd, &ctrl, &data, &flags);
599 if (errno = EAGAIN || errno == EINTR)
601 syslog(LOG_ERR, "Error reading packet: %m");
609 * Got a M_PROTO or M_PCPROTO message. Huh?
612 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
618 * ppp_send_config - configure the transmit characteristics of
622 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
630 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
631 if (hungup && errno == ENXIO)
633 syslog(LOG_ERR, "Couldn't set MTU: %m");
635 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
636 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
638 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
639 cf[1] = COMP_PROT | COMP_AC;
640 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
641 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
646 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
649 ppp_set_xaccm(unit, accm)
653 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
654 if (!hungup || errno != ENXIO)
655 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
660 * ppp_recv_config - configure the receive-side characteristics of
664 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
672 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
673 if (hungup && errno == ENXIO)
675 syslog(LOG_ERR, "Couldn't set MRU: %m");
677 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
678 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
680 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
681 cf[1] = DECOMP_PROT | DECOMP_AC;
682 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
683 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
688 * ccp_test - ask kernel whether a given compression method
689 * is acceptable for use.
692 ccp_test(unit, opt_ptr, opt_len, for_transmit)
693 int unit, opt_len, for_transmit;
696 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
697 opt_ptr, opt_len, 0) >= 0)
699 return (errno == ENOSR)? 0: -1;
703 * ccp_flags_set - inform kernel about the current state of CCP.
706 ccp_flags_set(unit, isopen, isup)
707 int unit, isopen, isup;
711 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
712 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
713 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
714 if (!hungup || errno != ENXIO)
715 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
720 * ccp_fatal_error - returns 1 if decompression was disabled as a
721 * result of an error detected after decompression of a packet,
722 * 0 otherwise. This is necessary because of patent nonsense.
725 ccp_fatal_error(unit)
731 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
732 if (errno != ENXIO && errno != EINVAL)
733 syslog(LOG_ERR, "Couldn't get compression flags: %m");
736 return cf[0] & CCP_FATALERROR;
740 * sifvjcomp - config tcp header compression
743 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
744 int u, vjcomp, xcidcomp, xmaxcid;
750 maxcid[0] = xcidcomp;
751 maxcid[1] = 15; /* XXX should be rmaxcid */
752 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
753 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
757 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
758 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
759 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
760 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
762 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
769 * sifup - Config the interface up and enable IP packets to pass.
777 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
778 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
779 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
782 ifr.ifr_flags |= IFF_UP;
783 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
784 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
792 * sifdown - Config the interface down and disable IP.
800 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
801 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
802 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
805 if ((ifr.ifr_flags & IFF_UP) != 0) {
806 ifr.ifr_flags &= ~IFF_UP;
807 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
808 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
816 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
819 * sifaddr - Config the interface IP addresses and netmask.
828 memset(&ifr, 0, sizeof(ifr));
829 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
830 ifr.ifr_addr.sa_family = AF_INET;
831 INET_ADDR(ifr.ifr_addr) = o;
832 if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
833 syslog(LOG_ERR, "Couldn't set local IP address: %m");
835 ifr.ifr_dstaddr.sa_family = AF_INET;
836 INET_ADDR(ifr.ifr_dstaddr) = h;
837 if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
838 syslog(LOG_ERR, "Couldn't set remote IP address: %m");
840 ifr.ifr_addr.sa_family = AF_INET;
841 INET_ADDR(ifr.ifr_addr) = m;
842 if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
843 syslog(LOG_ERR, "Couldn't set IP netmask: %m");
845 ifr.ifr_metric = link_mtu;
846 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
847 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
854 * cifaddr - Clear the interface IP addresses, and delete routes
855 * through the interface if possible.
864 rt.rt_dst.sa_family = AF_INET;
865 INET_ADDR(rt.rt_dst) = h;
866 rt.rt_gateway.sa_family = AF_INET;
867 INET_ADDR(rt.rt_gateway) = o;
868 rt.rt_flags = RTF_HOST;
869 ioctl(sockfd, SIOCDELRT, &rt);
874 * sifdefaultroute - assign a default route through the address given.
877 sifdefaultroute(u, g)
883 rt.rt_dst.sa_family = AF_INET;
884 INET_ADDR(rt.rt_dst) = 0;
885 rt.rt_gateway.sa_family = AF_INET;
886 INET_ADDR(rt.rt_gateway) = g;
887 rt.rt_flags = RTF_GATEWAY;
889 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
890 syslog(LOG_ERR, "Can't add default route: %m");
894 default_route_gateway = g;
899 * cifdefaultroute - delete a default route through the address given.
902 cifdefaultroute(u, g)
908 rt.rt_dst.sa_family = AF_INET;
909 INET_ADDR(rt.rt_dst) = 0;
910 rt.rt_gateway.sa_family = AF_INET;
911 INET_ADDR(rt.rt_gateway) = g;
912 rt.rt_flags = RTF_GATEWAY;
914 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
915 syslog(LOG_ERR, "Can't delete default route: %m");
919 default_route_gateway = 0;
924 * sifproxyarp - Make a proxy ARP entry for the peer.
927 sifproxyarp(unit, hisaddr)
931 struct arpreq arpreq;
933 bzero(&arpreq, sizeof(arpreq));
934 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
937 arpreq.arp_pa.sa_family = AF_INET;
938 INET_ADDR(arpreq.arp_pa) = hisaddr;
939 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
940 if (ioctl(sockfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
941 syslog(LOG_ERR, "Couldn't set proxy ARP entry: %m");
945 proxy_arp_addr = hisaddr;
950 * cifproxyarp - Delete the proxy ARP entry for the peer.
953 cifproxyarp(unit, hisaddr)
957 struct arpreq arpreq;
959 bzero(&arpreq, sizeof(arpreq));
960 arpreq.arp_pa.sa_family = AF_INET;
961 INET_ADDR(arpreq.arp_pa) = hisaddr;
962 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
963 syslog(LOG_ERR, "Couldn't delete proxy ARP entry: %m");
972 * get_ether_addr - get the hardware address of an interface on the
973 * the same subnet as ipaddr.
978 get_ether_addr(ipaddr, hwaddr)
980 struct sockaddr *hwaddr;
982 struct ifreq *ifr, *ifend;
986 struct ifreq ifs[MAX_IFS];
989 ifc.ifc_len = sizeof(ifs);
991 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
992 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
997 * Scan through looking for an interface with an Internet
998 * address on the same subnet as `ipaddr'.
1000 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1001 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1002 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1003 if (ifr->ifr_addr.sa_family == AF_INET) {
1006 * Check that the interface is up, and not point-to-point
1009 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1010 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1012 if ((ifreq.ifr_flags &
1013 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1014 != (IFF_UP|IFF_BROADCAST))
1018 * Get its netmask and check that it's on the right subnet.
1020 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1022 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1023 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1024 if ((ipaddr & mask) != (ina & mask))
1033 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1036 * Grab the physical address for this interface.
1038 if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
1039 syslog(LOG_ERR, "Couldn't open /dev/nit: %m");
1042 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1043 if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
1044 || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
1045 syslog(LOG_ERR, "Couldn't get hardware address for %s: %m",
1051 hwaddr->sa_family = AF_UNSPEC;
1052 memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
1057 #define WTMPFILE "/usr/adm/wtmp"
1060 logwtmp(line, name, host)
1061 char *line, *name, *host;
1067 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1069 if (!fstat(fd, &buf)) {
1070 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1071 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1072 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1073 (void)time(&ut.ut_time);
1074 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1075 (void)ftruncate(fd, buf.st_size);
1081 * Return user specified netmask, modified by any mask we might determine
1082 * for address `addr' (in network byte order).
1083 * Here we scan through the system's list of interfaces, looking for
1084 * any non-point-to-point interfaces which might appear to be on the same
1085 * network as `addr'. If we find any, we OR in their netmask to the
1086 * user-specified netmask.
1092 u_int32_t mask, nmask, ina;
1093 struct ifreq *ifr, *ifend, ifreq;
1097 if (IN_CLASSA(addr)) /* determine network mask for address class */
1098 nmask = IN_CLASSA_NET;
1099 else if (IN_CLASSB(addr))
1100 nmask = IN_CLASSB_NET;
1102 nmask = IN_CLASSC_NET;
1103 /* class D nets are disallowed by bad_ip_adrs */
1104 mask = netmask | htonl(nmask);
1107 * Scan through the system's network interfaces.
1109 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1110 ifc.ifc_req = alloca(ifc.ifc_len);
1111 if (ifc.ifc_req == 0)
1113 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1114 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1117 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1118 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1120 * Check the interface's internet address.
1122 if (ifr->ifr_addr.sa_family != AF_INET)
1124 ina = INET_ADDR(ifr->ifr_addr);
1125 if ((ntohl(ina) & nmask) != (addr & nmask))
1128 * Check that the interface is up, and not point-to-point or loopback.
1130 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1131 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1133 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1137 * Get its netmask and OR it into our mask.
1139 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1141 mask |= INET_ADDR(ifreq.ifr_addr);
1148 strioctl(fd, cmd, ptr, ilen, olen)
1149 int fd, cmd, ilen, olen;
1152 struct strioctl str;
1158 if (ioctl(fd, I_STR, &str) == -1)
1160 if (str.ic_len != olen)
1161 syslog(LOG_DEBUG, "strioctl: expected %d bytes, got %d for cmd %x\n",
1162 olen, str.ic_len, cmd);
1167 * Code for locking/unlocking the serial device.
1168 * This code is derived from chat.c.
1171 #if !defined(HDB) && !defined(SUNOS3)
1172 #define HDB 1 /* ascii lock files are the default */
1178 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1180 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1182 #endif /* LOCK_DIR */
1184 static char *lock_file; /* name of lock file created */
1187 * lock - create a lock file for the named device.
1193 char hdb_lock_buffer[12];
1197 if ((p = strrchr(dev, '/')) != NULL)
1199 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1200 if (lock_file == NULL)
1201 novm("lock file name");
1202 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1204 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1206 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1207 /* Read the lock file to find out who has the device locked */
1209 n = read(fd, hdb_lock_buffer, 11);
1211 hdb_lock_buffer[n] = 0;
1212 pid = atoi(hdb_lock_buffer);
1215 n = read(fd, &pid, sizeof(pid));
1218 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1221 if (kill(pid, 0) == -1 && errno == ESRCH) {
1222 /* pid no longer exists - remove the lock file */
1223 if (unlink(lock_file) == 0) {
1225 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1229 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1232 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1237 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1244 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1245 write(fd, hdb_lock_buffer, 11);
1248 write(fd, &pid, sizeof pid);
1256 * unlock - remove our lockfile
1269 * SunOS doesn't have strtoul :-(
1272 strtoul(str, ptr, base)
1276 return (unsigned long) strtol(str, ptr, base);