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,
28 #define RCSID "$Id: sys-sunos4.c,v 1.28 2001/05/23 03:39:13 paulus Exp $"
42 #include <sys/types.h>
43 #include <sys/param.h>
44 #include <sys/socket.h>
45 #include <sys/sockio.h>
46 #include <sys/stream.h>
47 #include <sys/stropts.h>
52 #include <net/if_arp.h>
53 #include <net/nit_if.h>
54 #include <net/route.h>
55 #include <net/ppp_defs.h>
56 #include <net/pppio.h>
57 #include <netinet/in.h>
61 #if defined(sun) && defined(sparc)
64 extern void *alloca();
68 static const char rcsid[] = RCSID;
71 static int fdmuxid = -1;
75 static int restore_term;
76 static struct termios inittermios;
77 static struct winsize wsinfo; /* Initial window size info */
78 static pid_t parent_pid; /* PID of our parent */
80 extern u_char inpacket_buf[]; /* borrowed from main.c */
82 #define MAX_POLLFDS 32
83 static struct pollfd pollfds[MAX_POLLFDS];
86 static int link_mtu, link_mru;
89 static int tty_nmodules;
90 static char tty_modules[NMODULES][FMNAMESZ+1];
92 static int if_is_up; /* Interface has been marked up */
93 static u_int32_t ifaddrs[2]; /* local and remote addresses */
94 static u_int32_t default_route_gateway; /* Gateway for default route added */
95 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
97 /* Prototypes for procedures local to this file. */
98 static int translate_speed __P((int));
99 static int baud_rate_of __P((int));
100 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
101 static int strioctl __P((int, int, void *, int, int));
105 * sys_init - System-dependent initialization.
112 /* Get an internet socket for doing socket ioctl's on. */
113 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
114 fatal("Couldn't create IP socket: %m");
117 * We may want to send a SIGHUP to the session leader associated
118 * with our controlling terminal later. Because SunOS doesn't
119 * have getsid(), we make do with sending the signal to our
122 parent_pid = getppid();
125 * Open the ppp device.
127 pppfd = open("/dev/ppp", O_RDWR | O_NONBLOCK, 0);
129 fatal("Can't open /dev/ppp: %m");
131 x = PPPDBG_LOG + PPPDBG_DRIVER;
132 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
135 /* Assign a new PPA and get its unit number. */
136 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
137 fatal("Can't create new PPP interface: %m");
140 * Open the ppp device again and push the if_ppp module on it.
142 iffd = open("/dev/ppp", O_RDWR, 0);
144 fatal("Can't open /dev/ppp (2): %m");
146 x = PPPDBG_LOG + PPPDBG_DRIVER;
147 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
149 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0)
150 fatal("Couldn't attach ppp interface to device: %m");
151 if (ioctl(iffd, I_PUSH, "if_ppp") < 0)
152 fatal("Can't push ppp interface module: %m");
154 x = PPPDBG_LOG + PPPDBG_IF;
155 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
157 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0)
158 fatal("Couldn't create ppp interface unit: %m");
160 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0)
161 fatal("Couldn't bind ppp interface to IP SAP: %m");
167 * sys_cleanup - restore any system state we modified before exiting:
168 * mark the interface down, delete default route and/or proxy arp entry.
169 * This shouldn't call die() because it's called from die().
177 cifaddr(0, ifaddrs[0], ifaddrs[1]);
178 if (default_route_gateway)
179 cifdefaultroute(0, 0, default_route_gateway);
181 cifproxyarp(0, proxy_arp_addr);
185 * sys_close - Clean up in a child process before execing.
196 * sys_check_options - check the options that the user specified
206 * daemon - Detach us from controlling terminal session.
209 daemon(nochdir, noclose)
210 int nochdir, noclose;
214 if ((pid = fork()) < 0)
217 exit(0); /* parent dies */
222 fclose(stdin); /* don't need stdin, stdout, stderr */
231 * ppp_available - check whether the system has any ppp interfaces
238 return stat("/dev/ppp", &buf) >= 0;
242 * tty_establish_ppp - Turn the serial port into a ppp interface.
245 tty_establish_ppp(fd)
250 /* Pop any existing modules off the tty stream. */
252 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
253 || ioctl(fd, I_POP, 0) < 0)
257 /* Push the async hdlc module and the compressor module. */
258 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0)
259 fatal("Couldn't push PPP Async HDLC module: %m");
260 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
261 error("Couldn't push PPP compression module: %m");
263 /* Link the serial port under the PPP multiplexor. */
264 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0)
265 fatal("Can't link tty to PPP mux: %m");
271 * disestablish_ppp - Restore the serial port to normal operation.
272 * It attempts to reconstruct the stream with the previously popped
273 * modules. This shouldn't call die() because it's called from die().
276 tty_disestablish_ppp(fd)
282 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
284 error("Can't unlink tty from PPP mux: %m");
289 while (ioctl(fd, I_POP, 0) >= 0)
291 for (i = tty_nmodules - 1; i >= 0; --i)
292 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
293 error("Couldn't restore tty module %s: %m",
296 if (hungup && default_device && parent_pid > 0) {
298 * If we have received a hangup, we need to send a SIGHUP
299 * to the terminal's controlling process. The reason is
300 * that the original stream head for the terminal hasn't
301 * seen the M_HANGUP message (it went up through the ppp
302 * driver to the stream head for our fd to /dev/ppp).
303 * Actually we send the signal to the process that invoked
304 * pppd, since SunOS doesn't have getsid().
306 kill(parent_pid, SIGHUP);
312 * Check whether the link seems not to be 8-bit clean.
320 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
325 s = "bit 7 set to 1";
328 s = "bit 7 set to 0";
338 warn("Serial link is not 8-bit clean:");
339 warn("All received characters had %s", s);
344 * List of valid speeds.
347 int speed_int, speed_val;
419 * Translate from bits/second to a speed_t.
425 struct speed *speedp;
429 for (speedp = speeds; speedp->speed_int; speedp++)
430 if (bps == speedp->speed_int)
431 return speedp->speed_val;
432 warn("speed %d not supported", bps);
437 * Translate from a speed_t to bits/second.
443 struct speed *speedp;
447 for (speedp = speeds; speedp->speed_int; speedp++)
448 if (speed == speedp->speed_val)
449 return speedp->speed_int;
454 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
455 * at the requested speed, etc. If `local' is true, set CLOCAL
456 * regardless of whether the modem option was specified.
459 set_up_tty(fd, local)
465 if (tcgetattr(fd, &tios) < 0)
466 fatal("tcgetattr: %m");
470 ioctl(fd, TIOCGWINSZ, &wsinfo);
473 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
475 tios.c_cflag |= CRTSCTS;
476 else if (crtscts < 0)
477 tios.c_cflag &= ~CRTSCTS;
479 tios.c_cflag |= CS8 | CREAD | HUPCL;
481 tios.c_cflag |= CLOCAL;
482 tios.c_iflag = IGNBRK | IGNPAR;
486 tios.c_cc[VTIME] = 0;
489 tios.c_iflag |= IXON | IXOFF;
490 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
491 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
494 speed = translate_speed(inspeed);
496 cfsetospeed(&tios, speed);
497 cfsetispeed(&tios, speed);
499 speed = cfgetospeed(&tios);
501 * We can't proceed if the serial port speed is 0,
502 * since that implies that the serial port is disabled.
505 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
508 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
509 fatal("tcsetattr: %m");
511 baud_rate = inspeed = baud_rate_of(speed);
516 * restore_tty - restore the terminal to the saved settings.
523 if (!default_device) {
525 * Turn off echoing, because otherwise we can get into
526 * a loop with the tty and the modem echoing to each other.
527 * We presume we are the sole user of this tty device, so
528 * when we close it, it will revert to its defaults anyway.
530 inittermios.c_lflag &= ~(ECHO | ECHONL);
532 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
533 if (!hungup && errno != ENXIO)
534 warn("tcsetattr: %m");
535 ioctl(fd, TIOCSWINSZ, &wsinfo);
541 * setdtr - control the DTR line on the serial port.
542 * This is called from die(), so it shouldn't call die().
548 int modembits = TIOCM_DTR;
550 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
554 * open_loopback - open the device we use for getting packets
555 * in demand mode. Under SunOS, we use our existing fd
565 * output - Output PPP packet.
577 dump_packet("sent", p, len);
580 data.buf = (caddr_t) p;
582 while (putmsg(pppfd, NULL, &data, 0) < 0) {
583 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
585 error("Couldn't send packet: %m");
589 pfd.events = POLLOUT;
590 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
596 * wait_input - wait until there is data available,
597 * for the length of time specified by *timo (indefinite
602 struct timeval *timo;
606 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
607 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR) {
610 /* we can get EAGAIN on a heavily loaded system,
611 * just wait a short time and try again. */
617 * add_fd - add an fd to the set that wait_input waits for.
624 for (n = 0; n < n_pollfds; ++n)
625 if (pollfds[n].fd == fd)
627 if (n_pollfds < MAX_POLLFDS) {
628 pollfds[n_pollfds].fd = fd;
629 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
632 error("Too many inputs!");
636 * remove_fd - remove an fd from the set that wait_input waits for.
643 for (n = 0; n < n_pollfds; ++n) {
644 if (pollfds[n].fd == fd) {
645 while (++n < n_pollfds)
646 pollfds[n-1] = pollfds[n];
655 * wait_loop_output - wait until there is data available on the
656 * loopback, for the length of time specified by *timo (indefinite
660 wait_loop_output(timo)
661 struct timeval *timo;
667 * wait_time - wait for a given length of time or until a
668 * signal is received.
672 struct timeval *timo;
676 n = select(0, NULL, NULL, NULL, timo);
677 if (n < 0 && errno != EINTR)
683 * read_packet - get a PPP packet from the serial device.
689 struct strbuf ctrl, data;
691 unsigned char ctrlbuf[64];
694 data.maxlen = PPP_MRU + PPP_HDRLEN;
695 data.buf = (caddr_t) buf;
696 ctrl.maxlen = sizeof(ctrlbuf);
697 ctrl.buf = (caddr_t) ctrlbuf;
699 len = getmsg(pppfd, &ctrl, &data, &flags);
701 if (errno == EAGAIN || errno == EINTR)
703 fatal("Error reading packet: %m");
710 * Got a M_PROTO or M_PCPROTO message. Huh?
713 dbglog("got ctrl msg len=%d", ctrl.len);
719 * get_loop_output - get outgoing packets from the ppp device,
720 * and detect when we want to bring the real link up.
721 * Return value is 1 if we need to bring up the link, 0 otherwise.
729 while ((len = read_packet(inpacket_buf)) > 0) {
730 if (loop_frame(inpacket_buf, len))
737 * netif_set_mtu - set the MTU on the PPP network interface.
740 netif_set_mtu(unit, mtu)
745 memset(&ifr, 0, sizeof(ifr));
746 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
747 ifr.ifr_metric = link_mtu;
748 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
749 error("Couldn't set IP MTU: %m");
754 * tty_send_config - configure the transmit characteristics of
758 tty_send_config(mtu, asyncmap, pcomp, accomp)
766 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
767 if (hungup && errno == ENXIO)
769 error("Couldn't set MTU: %m");
771 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
772 error("Couldn't set transmit ACCM: %m");
774 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
775 cf[1] = COMP_PROT | COMP_AC;
776 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
777 error("Couldn't set prot/AC compression: %m");
782 * tty_set_xaccm - set the extended transmit ACCM for the interface.
785 tty_set_xaccm(unit, accm)
789 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
790 if (!hungup || errno != ENXIO)
791 warn("Couldn't set extended ACCM: %m");
796 * tty_recv_config - configure the receive-side characteristics of
800 tty_recv_config(mru, asyncmap, pcomp, accomp)
808 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
809 if (hungup && errno == ENXIO)
811 error("Couldn't set MRU: %m");
813 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
814 error("Couldn't set receive ACCM: %m");
816 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
817 cf[1] = DECOMP_PROT | DECOMP_AC;
818 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
819 error("Couldn't set prot/AC decompression: %m");
824 * ccp_test - ask kernel whether a given compression method
825 * is acceptable for use.
828 ccp_test(unit, opt_ptr, opt_len, for_transmit)
829 int unit, opt_len, for_transmit;
832 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
833 opt_ptr, opt_len, 0) >= 0)
835 return (errno == ENOSR)? 0: -1;
839 * ccp_flags_set - inform kernel about the current state of CCP.
842 ccp_flags_set(unit, isopen, isup)
843 int unit, isopen, isup;
847 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
848 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
849 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
850 if (!hungup || errno != ENXIO)
851 error("Couldn't set kernel CCP state: %m");
856 * get_idle_time - return how long the link has been idle.
863 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
867 * get_ppp_stats - return statistics for the link.
870 get_ppp_stats(u, stats)
872 struct pppd_stats *stats;
876 if (strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
877 error("Couldn't get link statistics: %m");
880 stats->bytes_in = s.p.ppp_ibytes;
881 stats->bytes_out = s.p.ppp_obytes;
882 stats->pkts_in = s.p.ppp_ipackets;
883 stats->pkts_out = s.p.ppp_opackets;
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)
900 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
901 if (errno != ENXIO && errno != EINVAL)
902 error("Couldn't get compression flags: %m");
905 return cf[0] & CCP_FATALERROR;
909 * sifvjcomp - config tcp header compression
912 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
913 int u, vjcomp, xcidcomp, xmaxcid;
919 maxcid[0] = xcidcomp;
920 maxcid[1] = 15; /* XXX should be rmaxcid */
921 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
922 error("Couldn't initialize VJ compression: %m");
926 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
927 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
928 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
929 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
931 error("Couldn't enable VJ compression: %m");
938 * sifup - Config the interface up and enable IP packets to pass.
946 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
947 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
948 error("Couldn't mark interface up (get): %m");
951 ifr.ifr_flags |= IFF_UP;
952 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
953 error("Couldn't mark interface up (set): %m");
961 * sifdown - Config the interface down and disable IP.
969 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
970 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
971 error("Couldn't mark interface down (get): %m");
974 if ((ifr.ifr_flags & IFF_UP) != 0) {
975 ifr.ifr_flags &= ~IFF_UP;
976 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
977 error("Couldn't mark interface down (set): %m");
986 * sifnpmode - Set the mode for handling packets for a given NP.
989 sifnpmode(u, proto, mode)
998 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
999 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1005 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1008 * sifaddr - Config the interface IP addresses and netmask.
1017 memset(&ifr, 0, sizeof(ifr));
1018 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1019 ifr.ifr_addr.sa_family = AF_INET;
1020 INET_ADDR(ifr.ifr_addr) = m;
1021 if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
1022 error("Couldn't set IP netmask: %m");
1024 ifr.ifr_addr.sa_family = AF_INET;
1025 INET_ADDR(ifr.ifr_addr) = o;
1026 if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
1027 error("Couldn't set local IP address: %m");
1029 ifr.ifr_dstaddr.sa_family = AF_INET;
1030 INET_ADDR(ifr.ifr_dstaddr) = h;
1031 if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
1032 error("Couldn't set remote IP address: %m");
1034 #if 0 /* now done in ppp_send_config */
1035 ifr.ifr_metric = link_mtu;
1036 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
1037 error("Couldn't set IP MTU: %m");
1047 * cifaddr - Clear the interface IP addresses, and delete routes
1048 * through the interface if possible.
1057 bzero(&rt, sizeof(rt));
1058 rt.rt_dst.sa_family = AF_INET;
1059 INET_ADDR(rt.rt_dst) = h;
1060 rt.rt_gateway.sa_family = AF_INET;
1061 INET_ADDR(rt.rt_gateway) = o;
1062 rt.rt_flags = RTF_HOST;
1063 if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
1064 error("Couldn't delete route through interface: %m");
1070 * sifdefaultroute - assign a default route through the address given.
1073 sifdefaultroute(u, l, g)
1079 bzero(&rt, sizeof(rt));
1080 rt.rt_dst.sa_family = AF_INET;
1081 INET_ADDR(rt.rt_dst) = 0;
1082 rt.rt_gateway.sa_family = AF_INET;
1083 INET_ADDR(rt.rt_gateway) = g;
1084 rt.rt_flags = RTF_GATEWAY;
1086 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1087 error("Can't add default route: %m");
1091 default_route_gateway = g;
1096 * cifdefaultroute - delete a default route through the address given.
1099 cifdefaultroute(u, l, g)
1105 bzero(&rt, sizeof(rt));
1106 rt.rt_dst.sa_family = AF_INET;
1107 INET_ADDR(rt.rt_dst) = 0;
1108 rt.rt_gateway.sa_family = AF_INET;
1109 INET_ADDR(rt.rt_gateway) = g;
1110 rt.rt_flags = RTF_GATEWAY;
1112 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
1113 error("Can't delete default route: %m");
1117 default_route_gateway = 0;
1122 * sifproxyarp - Make a proxy ARP entry for the peer.
1125 sifproxyarp(unit, hisaddr)
1129 struct arpreq arpreq;
1131 bzero(&arpreq, sizeof(arpreq));
1132 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
1135 arpreq.arp_pa.sa_family = AF_INET;
1136 INET_ADDR(arpreq.arp_pa) = hisaddr;
1137 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1138 if (ioctl(sockfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
1139 error("Couldn't set proxy ARP entry: %m");
1143 proxy_arp_addr = hisaddr;
1148 * cifproxyarp - Delete the proxy ARP entry for the peer.
1151 cifproxyarp(unit, hisaddr)
1155 struct arpreq arpreq;
1157 bzero(&arpreq, sizeof(arpreq));
1158 arpreq.arp_pa.sa_family = AF_INET;
1159 INET_ADDR(arpreq.arp_pa) = hisaddr;
1160 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1161 error("Couldn't delete proxy ARP entry: %m");
1170 * get_ether_addr - get the hardware address of an interface on the
1171 * the same subnet as ipaddr.
1176 get_ether_addr(ipaddr, hwaddr)
1178 struct sockaddr *hwaddr;
1180 struct ifreq *ifr, *ifend;
1181 u_int32_t ina, mask;
1184 struct ifreq ifs[MAX_IFS];
1187 ifc.ifc_len = sizeof(ifs);
1189 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1190 error("ioctl(SIOCGIFCONF): %m");
1195 * Scan through looking for an interface with an Internet
1196 * address on the same subnet as `ipaddr'.
1198 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1199 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1200 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1201 if (ifr->ifr_addr.sa_family == AF_INET) {
1204 * Check that the interface is up, and not point-to-point
1207 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1208 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1210 if ((ifreq.ifr_flags &
1211 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1212 != (IFF_UP|IFF_BROADCAST))
1216 * Get its netmask and check that it's on the right subnet.
1218 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1220 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1221 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1222 if ((ipaddr & mask) != (ina & mask))
1231 info("found interface %s for proxy arp", ifr->ifr_name);
1234 * Grab the physical address for this interface.
1236 if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
1237 error("Couldn't open /dev/nit: %m");
1240 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1241 if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
1242 || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
1243 error("Couldn't get hardware address for %s: %m",
1249 hwaddr->sa_family = AF_UNSPEC;
1250 memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
1256 * have_route_to - determine if the system has any route to
1257 * a given IP address.
1258 * For demand mode to work properly, we have to ignore routes
1259 * through our own interface.
1261 int have_route_to(addr)
1267 #define WTMPFILE "/usr/adm/wtmp"
1270 logwtmp(line, name, host)
1271 const char *line, *name, *host;
1277 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1279 if (!fstat(fd, &buf)) {
1280 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1281 strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1282 strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1283 (void)time(&ut.ut_time);
1284 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1285 (void)ftruncate(fd, buf.st_size);
1291 * Return user specified netmask, modified by any mask we might determine
1292 * for address `addr' (in network byte order).
1293 * Here we scan through the system's list of interfaces, looking for
1294 * any non-point-to-point interfaces which might appear to be on the same
1295 * network as `addr'. If we find any, we OR in their netmask to the
1296 * user-specified netmask.
1302 u_int32_t mask, nmask, ina;
1303 struct ifreq *ifr, *ifend, ifreq;
1307 if (IN_CLASSA(addr)) /* determine network mask for address class */
1308 nmask = IN_CLASSA_NET;
1309 else if (IN_CLASSB(addr))
1310 nmask = IN_CLASSB_NET;
1312 nmask = IN_CLASSC_NET;
1313 /* class D nets are disallowed by bad_ip_adrs */
1314 mask = netmask | htonl(nmask);
1317 * Scan through the system's network interfaces.
1319 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1320 ifc.ifc_req = alloca(ifc.ifc_len);
1321 if (ifc.ifc_req == 0)
1323 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1324 warn("Couldn't get system interface list: %m");
1327 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1328 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1330 * Check the interface's internet address.
1332 if (ifr->ifr_addr.sa_family != AF_INET)
1334 ina = INET_ADDR(ifr->ifr_addr);
1335 if ((ntohl(ina) & nmask) != (addr & nmask))
1338 * Check that the interface is up, and not point-to-point or loopback.
1340 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1341 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1343 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1347 * Get its netmask and OR it into our mask.
1349 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1351 mask |= INET_ADDR(ifreq.ifr_addr);
1358 strioctl(fd, cmd, ptr, ilen, olen)
1359 int fd, cmd, ilen, olen;
1362 struct strioctl str;
1368 if (ioctl(fd, I_STR, &str) == -1)
1370 if (str.ic_len != olen)
1371 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1372 olen, str.ic_len, cmd);
1377 * Use the hostid as part of the random number seed.
1387 * Code for locking/unlocking the serial device.
1388 * This code is derived from chat.c.
1391 #if !defined(HDB) && !defined(SUNOS3)
1392 #define HDB 1 /* ascii lock files are the default */
1398 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1400 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1402 #endif /* LOCK_DIR */
1404 static char *lock_file; /* name of lock file created */
1407 * lock - create a lock file for the named device.
1413 char hdb_lock_buffer[12];
1418 if ((p = strrchr(dev, '/')) != NULL)
1420 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1421 lock_file = malloc(l);
1422 if (lock_file == NULL)
1423 novm("lock file name");
1424 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1426 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1428 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1429 /* Read the lock file to find out who has the device locked */
1431 n = read(fd, hdb_lock_buffer, 11);
1433 hdb_lock_buffer[n] = 0;
1434 pid = atoi(hdb_lock_buffer);
1437 n = read(fd, &pid, sizeof(pid));
1440 error("Can't read pid from lock file %s", lock_file);
1443 if (kill(pid, 0) == -1 && errno == ESRCH) {
1444 /* pid no longer exists - remove the lock file */
1445 if (unlink(lock_file) == 0) {
1447 notice("Removed stale lock on %s (pid %d)",
1451 warn("Couldn't remove stale lock on %s",
1454 notice("Device %s is locked by pid %d",
1459 error("Can't create lock file %s: %m", lock_file);
1466 slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
1467 write(fd, hdb_lock_buffer, 11);
1470 write(fd, &pid, sizeof pid);
1478 * unlock - remove our lockfile
1489 #endif /* lock stuff removed */
1492 * get_pty - get a pty master/slave pair and chown the slave side
1493 * to the uid given. Assumes slave_name points to >= 12 bytes of space.
1496 get_pty(master_fdp, slave_fdp, slave_name, uid)
1504 struct termios tios;
1507 for (i = 0; i < 64; ++i) {
1508 slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x",
1509 'p' + i / 16, i % 16);
1510 mfd = open(pty_name, O_RDWR, 0);
1513 sfd = open(pty_name, O_RDWR | O_NOCTTY, 0);
1522 strlcpy(slave_name, pty_name, 12);
1525 fchown(sfd, uid, -1);
1526 fchmod(sfd, S_IRUSR | S_IWUSR);
1527 if (tcgetattr(sfd, &tios) == 0) {
1528 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1529 tios.c_cflag |= CS8 | CREAD;
1530 tios.c_iflag = IGNPAR | CLOCAL;
1533 if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0)
1534 warn("couldn't set attributes on pty: %m");
1536 warn("couldn't get attributes on pty: %m");
1542 * SunOS doesn't have strtoul :-(
1545 strtoul(str, ptr, base)
1549 return (unsigned long) strtol(str, ptr, base);
1555 extern char *sys_errlist[];
1556 extern int sys_nerr;
1562 static char unknown[32];
1564 if (n > 0 && n < sys_nerr)
1565 return sys_errlist[n];
1566 slprintf(unknown, sizeof(unknown), "Error %d", n);