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 1.4 1996/04/04 04:06:59 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>
64 #if defined(sun) && defined(sparc)
69 static int fdmuxid = -1;
73 static int restore_term;
74 static struct termios inittermios;
75 static struct winsize wsinfo; /* Initial window size info */
76 static pid_t parent_pid; /* PID of our parent */
78 extern u_char inpacket_buf[]; /* borrowed from main.c */
80 static int link_mtu, link_mru;
83 static int tty_nmodules;
84 static char tty_modules[NMODULES][FMNAMESZ+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 /* Prototypes for procedures local to this file. */
92 static int translate_speed __P((int));
93 static int baud_rate_of __P((int));
94 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
95 static int strioctl __P((int, int, void *, int, int));
99 * sys_init - System-dependent initialization.
106 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
107 setlogmask(LOG_UPTO(LOG_INFO));
109 setlogmask(LOG_UPTO(LOG_DEBUG));
111 /* Get an internet socket for doing socket ioctl's on. */
112 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
113 syslog(LOG_ERR, "Couldn't create IP socket: %m");
118 * We may want to send a SIGHUP to the session leader associated
119 * with our controlling terminal later. Because SunOS doesn't
120 * have getsid(), we make do with sending the signal to our
123 parent_pid = getppid();
126 * Open the ppp device.
128 pppfd = open("/dev/ppp", O_RDWR | O_NONBLOCK, 0);
130 syslog(LOG_ERR, "Can't open /dev/ppp: %m");
134 x = PPPDBG_LOG + PPPDBG_DRIVER;
135 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
138 /* Assign a new PPA and get its unit number. */
139 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
140 syslog(LOG_ERR, "Can't create new PPP interface: %m");
145 * Open the ppp device again and push the if_ppp module on it.
147 iffd = open("/dev/ppp", O_RDWR, 0);
149 syslog(LOG_ERR, "Can't open /dev/ppp (2): %m");
153 x = PPPDBG_LOG + PPPDBG_DRIVER;
154 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
156 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
157 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
160 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
161 syslog(LOG_ERR, "Can't push ppp interface module: %m");
165 x = PPPDBG_LOG + PPPDBG_IF;
166 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
168 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
169 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
173 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
174 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
180 * sys_cleanup - restore any system state we modified before exiting:
181 * mark the interface down, delete default route and/or proxy arp entry.
182 * This shouldn't call die() because it's called from die().
190 cifaddr(0, ifaddrs[0], ifaddrs[1]);
191 if (default_route_gateway)
192 cifdefaultroute(0, default_route_gateway);
194 cifproxyarp(0, proxy_arp_addr);
198 * sys_close - Clean up in a child process before execing.
210 * sys_check_options - check the options that the user specified
219 * daemon - Detach us from controlling terminal session.
222 daemon(nochdir, noclose)
223 int nochdir, noclose;
227 if ((pid = fork()) < 0)
230 exit(0); /* parent dies */
235 fclose(stdin); /* don't need stdin, stdout, stderr */
243 * note_debug_level - note a change in the debug level.
249 setlogmask(LOG_UPTO(LOG_DEBUG));
251 setlogmask(LOG_UPTO(LOG_WARNING));
256 * ppp_available - check whether the system has any ppp interfaces
263 return stat("/dev/ppp", &buf) >= 0;
267 * establish_ppp - Turn the serial port into a ppp interface.
275 /* Pop any existing modules off the tty stream. */
277 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
278 || ioctl(fd, I_POP, 0) < 0)
282 /* Push the async hdlc module and the compressor module. */
283 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
284 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
287 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
288 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
292 /* Link the serial port under the PPP multiplexor. */
293 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
294 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
300 * restore_loop - reattach the ppp unit to the loopback.
301 * This doesn't need to do anything because disestablish_ppp does it.
309 * disestablish_ppp - Restore the serial port to normal operation.
310 * It attempts to reconstruct the stream with the previously popped
311 * modules. This shouldn't call die() because it's called from die().
320 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
322 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
327 while (ioctl(fd, I_POP, 0) >= 0)
329 for (i = tty_nmodules - 1; i >= 0; --i)
330 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
331 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
334 if (hungup && default_device && parent_pid > 0) {
336 * If we have received a hangup, we need to send a SIGHUP
337 * to the terminal's controlling process. The reason is
338 * that the original stream head for the terminal hasn't
339 * seen the M_HANGUP message (it went up through the ppp
340 * driver to the stream head for our fd to /dev/ppp).
341 * Actually we send the signal to the process that invoked
342 * pppd, since SunOS doesn't have getsid().
344 kill(parent_pid, SIGHUP);
350 * Check whether the link seems not to be 8-bit clean.
358 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
363 s = "bit 7 set to 1";
366 s = "bit 7 set to 0";
376 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
377 syslog(LOG_WARNING, "All received characters had %s", s);
382 * List of valid speeds.
385 int speed_int, speed_val;
457 * Translate from bits/second to a speed_t.
463 struct speed *speedp;
467 for (speedp = speeds; speedp->speed_int; speedp++)
468 if (bps == speedp->speed_int)
469 return speedp->speed_val;
470 syslog(LOG_WARNING, "speed %d not supported", bps);
475 * Translate from a speed_t to bits/second.
481 struct speed *speedp;
485 for (speedp = speeds; speedp->speed_int; speedp++)
486 if (speed == speedp->speed_val)
487 return speedp->speed_int;
492 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
493 * at the requested speed, etc. If `local' is true, set CLOCAL
494 * regardless of whether the modem option was specified.
497 set_up_tty(fd, local)
503 if (tcgetattr(fd, &tios) < 0) {
504 syslog(LOG_ERR, "tcgetattr: %m");
510 ioctl(fd, TIOCGWINSZ, &wsinfo);
513 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
515 tios.c_cflag |= CRTSCTS;
516 else if (crtscts < 0)
517 tios.c_cflag &= ~CRTSCTS;
519 tios.c_cflag |= CS8 | CREAD | HUPCL;
521 tios.c_cflag |= CLOCAL;
522 tios.c_iflag = IGNBRK | IGNPAR;
526 tios.c_cc[VTIME] = 0;
529 tios.c_iflag |= IXON | IXOFF;
530 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
531 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
534 speed = translate_speed(inspeed);
536 cfsetospeed(&tios, speed);
537 cfsetispeed(&tios, speed);
539 speed = cfgetospeed(&tios);
541 * We can't proceed if the serial port speed is 0,
542 * since that implies that the serial port is disabled.
545 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
551 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
552 syslog(LOG_ERR, "tcsetattr: %m");
556 baud_rate = inspeed = baud_rate_of(speed);
561 * restore_tty - restore the terminal to the saved settings.
568 if (!default_device) {
570 * Turn off echoing, because otherwise we can get into
571 * a loop with the tty and the modem echoing to each other.
572 * We presume we are the sole user of this tty device, so
573 * when we close it, it will revert to its defaults anyway.
575 inittermios.c_lflag &= ~(ECHO | ECHONL);
577 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
578 if (!hungup && errno != ENXIO)
579 syslog(LOG_WARNING, "tcsetattr: %m");
580 ioctl(fd, TIOCSWINSZ, &wsinfo);
586 * setdtr - control the DTR line on the serial port.
587 * This is called from die(), so it shouldn't call die().
593 int modembits = TIOCM_DTR;
595 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
599 * open_loopback - open the device we use for getting packets
600 * in demand mode. Under Solaris 2, we use our existing fd
609 * output - Output PPP packet.
622 log_packet(p, len, "sent ");
625 data.buf = (caddr_t) p;
627 while (putmsg(pppfd, NULL, &data, 0) < 0) {
628 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
630 syslog(LOG_ERR, "Couldn't send packet: %m");
634 pfd.events = POLLOUT;
635 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
641 * wait_input - wait until there is data available on fd,
642 * for the length of time specified by *timo (indefinite
647 struct timeval *timo;
652 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
654 pfd.events = POLLIN | POLLPRI | POLLHUP;
655 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
656 syslog(LOG_ERR, "poll: %m");
662 * wait_loop_output - wait until there is data available on the
663 * loopback, for the length of time specified by *timo (indefinite
667 wait_loop_output(timo)
668 struct timeval *timo;
674 * wait_time - wait for a given length of time or until a
675 * signal is received.
679 struct timeval *timo;
683 n = select(0, NULL, NULL, NULL, timo);
684 if (n < 0 && errno != EINTR) {
685 syslog(LOG_ERR, "select: %m");
692 * read_packet - get a PPP packet from the serial device.
698 struct strbuf ctrl, data;
700 unsigned char ctrlbuf[64];
703 data.maxlen = PPP_MRU + PPP_HDRLEN;
704 data.buf = (caddr_t) buf;
705 ctrl.maxlen = sizeof(ctrlbuf);
706 ctrl.buf = (caddr_t) ctrlbuf;
708 len = getmsg(pppfd, &ctrl, &data, &flags);
710 if (errno = EAGAIN || errno == EINTR)
712 syslog(LOG_ERR, "Error reading packet: %m");
720 * Got a M_PROTO or M_PCPROTO message. Huh?
723 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
729 * get_loop_output - get outgoing packets from the ppp device,
730 * and detect when we want to bring the real link up.
731 * Return value is 1 if we need to bring up the link, 0 otherwise.
739 while ((len = read_packet(inpacket_buf)) > 0) {
740 if (loop_frame(inpacket_buf, len))
747 * ppp_send_config - configure the transmit characteristics of
751 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
759 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
760 if (hungup && errno == ENXIO)
762 syslog(LOG_ERR, "Couldn't set MTU: %m");
764 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
765 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
767 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
768 cf[1] = COMP_PROT | COMP_AC;
769 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
770 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
775 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
778 ppp_set_xaccm(unit, accm)
782 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
783 if (!hungup || errno != ENXIO)
784 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
789 * ppp_recv_config - configure the receive-side characteristics of
793 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
801 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
802 if (hungup && errno == ENXIO)
804 syslog(LOG_ERR, "Couldn't set MRU: %m");
806 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
807 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
809 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
810 cf[1] = DECOMP_PROT | DECOMP_AC;
811 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
812 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
817 * ccp_test - ask kernel whether a given compression method
818 * is acceptable for use.
821 ccp_test(unit, opt_ptr, opt_len, for_transmit)
822 int unit, opt_len, for_transmit;
825 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
826 opt_ptr, opt_len, 0) >= 0)
828 return (errno == ENOSR)? 0: -1;
832 * ccp_flags_set - inform kernel about the current state of CCP.
835 ccp_flags_set(unit, isopen, isup)
836 int unit, isopen, isup;
840 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
841 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
842 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
843 if (!hungup || errno != ENXIO)
844 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
849 * get_idle_time - return how long the link has been idle.
856 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
861 * ccp_fatal_error - returns 1 if decompression was disabled as a
862 * result of an error detected after decompression of a packet,
863 * 0 otherwise. This is necessary because of patent nonsense.
866 ccp_fatal_error(unit)
872 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
873 if (errno != ENXIO && errno != EINVAL)
874 syslog(LOG_ERR, "Couldn't get compression flags: %m");
877 return cf[0] & CCP_FATALERROR;
881 * sifvjcomp - config tcp header compression
884 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
885 int u, vjcomp, xcidcomp, xmaxcid;
891 maxcid[0] = xcidcomp;
892 maxcid[1] = 15; /* XXX should be rmaxcid */
893 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
894 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
898 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
899 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
900 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
901 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
903 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
910 * sifup - Config the interface up and enable IP packets to pass.
918 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
919 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
920 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
923 ifr.ifr_flags |= IFF_UP;
924 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
925 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
933 * sifdown - Config the interface down and disable IP.
941 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
942 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
943 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
946 if ((ifr.ifr_flags & IFF_UP) != 0) {
947 ifr.ifr_flags &= ~IFF_UP;
948 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
949 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
958 * sifnpmode - Set the mode for handling packets for a given NP.
961 sifnpmode(u, proto, mode)
970 if (strioctl(pppfd, PPPIO_NPMODE, &npi, 2 * sizeof(int), 0) < 0) {
971 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
977 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
980 * sifaddr - Config the interface IP addresses and netmask.
989 memset(&ifr, 0, sizeof(ifr));
990 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
991 ifr.ifr_addr.sa_family = AF_INET;
992 INET_ADDR(ifr.ifr_addr) = m;
993 if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
994 syslog(LOG_ERR, "Couldn't set IP netmask: %m");
996 ifr.ifr_addr.sa_family = AF_INET;
997 INET_ADDR(ifr.ifr_addr) = o;
998 if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
999 syslog(LOG_ERR, "Couldn't set local IP address: %m");
1001 ifr.ifr_dstaddr.sa_family = AF_INET;
1002 INET_ADDR(ifr.ifr_dstaddr) = h;
1003 if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
1004 syslog(LOG_ERR, "Couldn't set remote IP address: %m");
1006 ifr.ifr_metric = link_mtu;
1007 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
1008 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
1017 * cifaddr - Clear the interface IP addresses, and delete routes
1018 * through the interface if possible.
1027 bzero(&rt, sizeof(rt));
1028 rt.rt_dst.sa_family = AF_INET;
1029 INET_ADDR(rt.rt_dst) = h;
1030 rt.rt_gateway.sa_family = AF_INET;
1031 INET_ADDR(rt.rt_gateway) = o;
1032 rt.rt_flags = RTF_HOST;
1033 if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
1034 syslog(LOG_ERR, "Couldn't delete route through interface: %m");
1040 * sifdefaultroute - assign a default route through the address given.
1043 sifdefaultroute(u, g)
1049 bzero(&rt, sizeof(rt));
1050 rt.rt_dst.sa_family = AF_INET;
1051 INET_ADDR(rt.rt_dst) = 0;
1052 rt.rt_gateway.sa_family = AF_INET;
1053 INET_ADDR(rt.rt_gateway) = g;
1054 rt.rt_flags = RTF_GATEWAY;
1056 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1057 syslog(LOG_ERR, "Can't add default route: %m");
1061 default_route_gateway = g;
1066 * cifdefaultroute - delete a default route through the address given.
1069 cifdefaultroute(u, g)
1075 bzero(&rt, sizeof(rt));
1076 rt.rt_dst.sa_family = AF_INET;
1077 INET_ADDR(rt.rt_dst) = 0;
1078 rt.rt_gateway.sa_family = AF_INET;
1079 INET_ADDR(rt.rt_gateway) = g;
1080 rt.rt_flags = RTF_GATEWAY;
1082 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
1083 syslog(LOG_ERR, "Can't delete default route: %m");
1087 default_route_gateway = 0;
1092 * sifproxyarp - Make a proxy ARP entry for the peer.
1095 sifproxyarp(unit, hisaddr)
1099 struct arpreq arpreq;
1101 bzero(&arpreq, sizeof(arpreq));
1102 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
1105 arpreq.arp_pa.sa_family = AF_INET;
1106 INET_ADDR(arpreq.arp_pa) = hisaddr;
1107 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1108 if (ioctl(sockfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
1109 syslog(LOG_ERR, "Couldn't set proxy ARP entry: %m");
1113 proxy_arp_addr = hisaddr;
1118 * cifproxyarp - Delete the proxy ARP entry for the peer.
1121 cifproxyarp(unit, hisaddr)
1125 struct arpreq arpreq;
1127 bzero(&arpreq, sizeof(arpreq));
1128 arpreq.arp_pa.sa_family = AF_INET;
1129 INET_ADDR(arpreq.arp_pa) = hisaddr;
1130 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1131 syslog(LOG_ERR, "Couldn't delete proxy ARP entry: %m");
1140 * get_ether_addr - get the hardware address of an interface on the
1141 * the same subnet as ipaddr.
1146 get_ether_addr(ipaddr, hwaddr)
1148 struct sockaddr *hwaddr;
1150 struct ifreq *ifr, *ifend;
1151 u_int32_t ina, mask;
1154 struct ifreq ifs[MAX_IFS];
1157 ifc.ifc_len = sizeof(ifs);
1159 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1160 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1165 * Scan through looking for an interface with an Internet
1166 * address on the same subnet as `ipaddr'.
1168 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1169 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1170 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1171 if (ifr->ifr_addr.sa_family == AF_INET) {
1174 * Check that the interface is up, and not point-to-point
1177 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1178 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1180 if ((ifreq.ifr_flags &
1181 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1182 != (IFF_UP|IFF_BROADCAST))
1186 * Get its netmask and check that it's on the right subnet.
1188 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1190 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1191 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1192 if ((ipaddr & mask) != (ina & mask))
1201 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1204 * Grab the physical address for this interface.
1206 if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
1207 syslog(LOG_ERR, "Couldn't open /dev/nit: %m");
1210 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1211 if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
1212 || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
1213 syslog(LOG_ERR, "Couldn't get hardware address for %s: %m",
1219 hwaddr->sa_family = AF_UNSPEC;
1220 memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
1225 #define WTMPFILE "/usr/adm/wtmp"
1228 logwtmp(line, name, host)
1229 char *line, *name, *host;
1235 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1237 if (!fstat(fd, &buf)) {
1238 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1239 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1240 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1241 (void)time(&ut.ut_time);
1242 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1243 (void)ftruncate(fd, buf.st_size);
1249 * Return user specified netmask, modified by any mask we might determine
1250 * for address `addr' (in network byte order).
1251 * Here we scan through the system's list of interfaces, looking for
1252 * any non-point-to-point interfaces which might appear to be on the same
1253 * network as `addr'. If we find any, we OR in their netmask to the
1254 * user-specified netmask.
1260 u_int32_t mask, nmask, ina;
1261 struct ifreq *ifr, *ifend, ifreq;
1265 if (IN_CLASSA(addr)) /* determine network mask for address class */
1266 nmask = IN_CLASSA_NET;
1267 else if (IN_CLASSB(addr))
1268 nmask = IN_CLASSB_NET;
1270 nmask = IN_CLASSC_NET;
1271 /* class D nets are disallowed by bad_ip_adrs */
1272 mask = netmask | htonl(nmask);
1275 * Scan through the system's network interfaces.
1277 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1278 ifc.ifc_req = alloca(ifc.ifc_len);
1279 if (ifc.ifc_req == 0)
1281 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1282 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1285 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1286 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1288 * Check the interface's internet address.
1290 if (ifr->ifr_addr.sa_family != AF_INET)
1292 ina = INET_ADDR(ifr->ifr_addr);
1293 if ((ntohl(ina) & nmask) != (addr & nmask))
1296 * Check that the interface is up, and not point-to-point or loopback.
1298 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1299 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1301 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1305 * Get its netmask and OR it into our mask.
1307 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1309 mask |= INET_ADDR(ifreq.ifr_addr);
1316 strioctl(fd, cmd, ptr, ilen, olen)
1317 int fd, cmd, ilen, olen;
1320 struct strioctl str;
1326 if (ioctl(fd, I_STR, &str) == -1)
1328 if (str.ic_len != olen)
1329 syslog(LOG_DEBUG, "strioctl: expected %d bytes, got %d for cmd %x\n",
1330 olen, str.ic_len, cmd);
1335 * Code for locking/unlocking the serial device.
1336 * This code is derived from chat.c.
1339 #if !defined(HDB) && !defined(SUNOS3)
1340 #define HDB 1 /* ascii lock files are the default */
1346 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1348 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1350 #endif /* LOCK_DIR */
1352 static char *lock_file; /* name of lock file created */
1355 * lock - create a lock file for the named device.
1361 char hdb_lock_buffer[12];
1365 if ((p = strrchr(dev, '/')) != NULL)
1367 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1368 if (lock_file == NULL)
1369 novm("lock file name");
1370 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1372 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1374 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1375 /* Read the lock file to find out who has the device locked */
1377 n = read(fd, hdb_lock_buffer, 11);
1379 hdb_lock_buffer[n] = 0;
1380 pid = atoi(hdb_lock_buffer);
1383 n = read(fd, &pid, sizeof(pid));
1386 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1389 if (kill(pid, 0) == -1 && errno == ESRCH) {
1390 /* pid no longer exists - remove the lock file */
1391 if (unlink(lock_file) == 0) {
1393 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1397 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1400 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1405 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1412 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1413 write(fd, hdb_lock_buffer, 11);
1416 write(fd, &pid, sizeof pid);
1424 * unlock - remove our lockfile
1437 * SunOS doesn't have strtoul :-(
1440 strtoul(str, ptr, base)
1444 return (unsigned long) strtol(str, ptr, base);