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 1.14 1999/03/16 02:57:07 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>
54 #include <net/if_arp.h>
55 #include <net/nit_if.h>
56 #include <net/route.h>
57 #include <net/ppp_defs.h>
58 #include <net/pppio.h>
59 #include <netinet/in.h>
63 #if defined(sun) && defined(sparc)
66 extern void *alloca();
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 */
230 * ppp_available - check whether the system has any ppp interfaces
237 return stat("/dev/ppp", &buf) >= 0;
241 * establish_ppp - Turn the serial port into a ppp interface.
249 /* Pop any existing modules off the tty stream. */
251 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
252 || ioctl(fd, I_POP, 0) < 0)
256 /* Push the async hdlc module and the compressor module. */
257 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0)
258 fatal("Couldn't push PPP Async HDLC module: %m");
259 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
260 error("Couldn't push PPP compression module: %m");
262 /* Link the serial port under the PPP multiplexor. */
263 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0)
264 fatal("Can't link tty to PPP mux: %m");
268 * restore_loop - reattach the ppp unit to the loopback.
269 * This doesn't need to do anything because disestablish_ppp does it.
277 * disestablish_ppp - Restore the serial port to normal operation.
278 * It attempts to reconstruct the stream with the previously popped
279 * modules. This shouldn't call die() because it's called from die().
288 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
290 error("Can't unlink tty from PPP mux: %m");
295 while (ioctl(fd, I_POP, 0) >= 0)
297 for (i = tty_nmodules - 1; i >= 0; --i)
298 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
299 error("Couldn't restore tty module %s: %m",
302 if (hungup && default_device && parent_pid > 0) {
304 * If we have received a hangup, we need to send a SIGHUP
305 * to the terminal's controlling process. The reason is
306 * that the original stream head for the terminal hasn't
307 * seen the M_HANGUP message (it went up through the ppp
308 * driver to the stream head for our fd to /dev/ppp).
309 * Actually we send the signal to the process that invoked
310 * pppd, since SunOS doesn't have getsid().
312 kill(parent_pid, SIGHUP);
318 * Check whether the link seems not to be 8-bit clean.
326 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
331 s = "bit 7 set to 1";
334 s = "bit 7 set to 0";
344 warn("Serial link is not 8-bit clean:");
345 warn("All received characters had %s", s);
350 * List of valid speeds.
353 int speed_int, speed_val;
425 * Translate from bits/second to a speed_t.
431 struct speed *speedp;
435 for (speedp = speeds; speedp->speed_int; speedp++)
436 if (bps == speedp->speed_int)
437 return speedp->speed_val;
438 warn("speed %d not supported", bps);
443 * Translate from a speed_t to bits/second.
449 struct speed *speedp;
453 for (speedp = speeds; speedp->speed_int; speedp++)
454 if (speed == speedp->speed_val)
455 return speedp->speed_int;
460 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
461 * at the requested speed, etc. If `local' is true, set CLOCAL
462 * regardless of whether the modem option was specified.
465 set_up_tty(fd, local)
471 if (tcgetattr(fd, &tios) < 0)
472 fatal("tcgetattr: %m");
476 ioctl(fd, TIOCGWINSZ, &wsinfo);
479 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
481 tios.c_cflag |= CRTSCTS;
482 else if (crtscts < 0)
483 tios.c_cflag &= ~CRTSCTS;
485 tios.c_cflag |= CS8 | CREAD | HUPCL;
487 tios.c_cflag |= CLOCAL;
488 tios.c_iflag = IGNBRK | IGNPAR;
492 tios.c_cc[VTIME] = 0;
495 tios.c_iflag |= IXON | IXOFF;
496 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
497 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
500 speed = translate_speed(inspeed);
502 cfsetospeed(&tios, speed);
503 cfsetispeed(&tios, speed);
505 speed = cfgetospeed(&tios);
507 * We can't proceed if the serial port speed is 0,
508 * since that implies that the serial port is disabled.
511 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
514 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
515 fatal("tcsetattr: %m");
517 baud_rate = inspeed = baud_rate_of(speed);
522 * restore_tty - restore the terminal to the saved settings.
529 if (!default_device) {
531 * Turn off echoing, because otherwise we can get into
532 * a loop with the tty and the modem echoing to each other.
533 * We presume we are the sole user of this tty device, so
534 * when we close it, it will revert to its defaults anyway.
536 inittermios.c_lflag &= ~(ECHO | ECHONL);
538 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
539 if (!hungup && errno != ENXIO)
540 warn("tcsetattr: %m");
541 ioctl(fd, TIOCSWINSZ, &wsinfo);
547 * setdtr - control the DTR line on the serial port.
548 * This is called from die(), so it shouldn't call die().
554 int modembits = TIOCM_DTR;
556 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
560 * open_loopback - open the device we use for getting packets
561 * in demand mode. Under Solaris 2, we use our existing fd
570 * output - Output PPP packet.
583 dbglog("sent %P", p, len);
586 data.buf = (caddr_t) p;
588 while (putmsg(pppfd, NULL, &data, 0) < 0) {
589 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
591 error("Couldn't send packet: %m");
595 pfd.events = POLLOUT;
596 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
602 * wait_input - wait until there is data available,
603 * for the length of time specified by *timo (indefinite
608 struct timeval *timo;
612 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
613 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
618 * wait_loop_output - wait until there is data available on the
619 * loopback, for the length of time specified by *timo (indefinite
623 wait_loop_output(timo)
624 struct timeval *timo;
630 * wait_time - wait for a given length of time or until a
631 * signal is received.
635 struct timeval *timo;
639 n = select(0, NULL, NULL, NULL, timo);
640 if (n < 0 && errno != EINTR)
646 * read_packet - get a PPP packet from the serial device.
652 struct strbuf ctrl, data;
654 unsigned char ctrlbuf[64];
657 data.maxlen = PPP_MRU + PPP_HDRLEN;
658 data.buf = (caddr_t) buf;
659 ctrl.maxlen = sizeof(ctrlbuf);
660 ctrl.buf = (caddr_t) ctrlbuf;
662 len = getmsg(pppfd, &ctrl, &data, &flags);
664 if (errno = EAGAIN || errno == EINTR)
666 fatal("Error reading packet: %m");
673 * Got a M_PROTO or M_PCPROTO message. Huh?
676 dbglog("got ctrl msg len=%d", ctrl.len);
682 * get_loop_output - get outgoing packets from the ppp device,
683 * and detect when we want to bring the real link up.
684 * Return value is 1 if we need to bring up the link, 0 otherwise.
692 while ((len = read_packet(inpacket_buf)) > 0) {
693 if (loop_frame(inpacket_buf, len))
700 * ppp_send_config - configure the transmit characteristics of
704 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
713 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
714 if (hungup && errno == ENXIO)
716 error("Couldn't set MTU: %m");
718 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
719 error("Couldn't set transmit ACCM: %m");
721 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
722 cf[1] = COMP_PROT | COMP_AC;
723 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
724 error("Couldn't set prot/AC compression: %m");
727 /* set mtu for ip as well */
728 memset(&ifr, 0, sizeof(ifr));
729 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
730 ifr.ifr_metric = link_mtu;
731 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
732 error("Couldn't set IP MTU: %m");
737 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
740 ppp_set_xaccm(unit, accm)
744 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
745 if (!hungup || errno != ENXIO)
746 warn("Couldn't set extended ACCM: %m");
751 * ppp_recv_config - configure the receive-side characteristics of
755 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
763 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
764 if (hungup && errno == ENXIO)
766 error("Couldn't set MRU: %m");
768 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
769 error("Couldn't set receive ACCM: %m");
771 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
772 cf[1] = DECOMP_PROT | DECOMP_AC;
773 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
774 error("Couldn't set prot/AC decompression: %m");
779 * ccp_test - ask kernel whether a given compression method
780 * is acceptable for use.
783 ccp_test(unit, opt_ptr, opt_len, for_transmit)
784 int unit, opt_len, for_transmit;
787 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
788 opt_ptr, opt_len, 0) >= 0)
790 return (errno == ENOSR)? 0: -1;
794 * ccp_flags_set - inform kernel about the current state of CCP.
797 ccp_flags_set(unit, isopen, isup)
798 int unit, isopen, isup;
802 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
803 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
804 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
805 if (!hungup || errno != ENXIO)
806 error("Couldn't set kernel CCP state: %m");
811 * get_idle_time - return how long the link has been idle.
818 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
823 * ccp_fatal_error - returns 1 if decompression was disabled as a
824 * result of an error detected after decompression of a packet,
825 * 0 otherwise. This is necessary because of patent nonsense.
828 ccp_fatal_error(unit)
834 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
835 if (errno != ENXIO && errno != EINVAL)
836 error("Couldn't get compression flags: %m");
839 return cf[0] & CCP_FATALERROR;
843 * sifvjcomp - config tcp header compression
846 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
847 int u, vjcomp, xcidcomp, xmaxcid;
853 maxcid[0] = xcidcomp;
854 maxcid[1] = 15; /* XXX should be rmaxcid */
855 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
856 error("Couldn't initialize VJ compression: %m");
860 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
861 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
862 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
863 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
865 error("Couldn't enable VJ compression: %m");
872 * sifup - Config the interface up and enable IP packets to pass.
880 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
881 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
882 error("Couldn't mark interface up (get): %m");
885 ifr.ifr_flags |= IFF_UP;
886 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
887 error("Couldn't mark interface up (set): %m");
895 * sifdown - Config the interface down and disable IP.
903 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
904 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
905 error("Couldn't mark interface down (get): %m");
908 if ((ifr.ifr_flags & IFF_UP) != 0) {
909 ifr.ifr_flags &= ~IFF_UP;
910 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
911 error("Couldn't mark interface down (set): %m");
920 * sifnpmode - Set the mode for handling packets for a given NP.
923 sifnpmode(u, proto, mode)
932 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
933 error("ioctl(set NP %d mode to %d): %m", proto, mode);
939 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
942 * sifaddr - Config the interface IP addresses and netmask.
951 memset(&ifr, 0, sizeof(ifr));
952 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
953 ifr.ifr_addr.sa_family = AF_INET;
954 INET_ADDR(ifr.ifr_addr) = m;
955 if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
956 error("Couldn't set IP netmask: %m");
958 ifr.ifr_addr.sa_family = AF_INET;
959 INET_ADDR(ifr.ifr_addr) = o;
960 if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
961 error("Couldn't set local IP address: %m");
963 ifr.ifr_dstaddr.sa_family = AF_INET;
964 INET_ADDR(ifr.ifr_dstaddr) = h;
965 if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
966 error("Couldn't set remote IP address: %m");
968 #if 0 /* now done in ppp_send_config */
969 ifr.ifr_metric = link_mtu;
970 if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
971 error("Couldn't set IP MTU: %m");
981 * cifaddr - Clear the interface IP addresses, and delete routes
982 * through the interface if possible.
991 bzero(&rt, sizeof(rt));
992 rt.rt_dst.sa_family = AF_INET;
993 INET_ADDR(rt.rt_dst) = h;
994 rt.rt_gateway.sa_family = AF_INET;
995 INET_ADDR(rt.rt_gateway) = o;
996 rt.rt_flags = RTF_HOST;
997 if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
998 error("Couldn't delete route through interface: %m");
1004 * sifdefaultroute - assign a default route through the address given.
1007 sifdefaultroute(u, l, g)
1013 bzero(&rt, sizeof(rt));
1014 rt.rt_dst.sa_family = AF_INET;
1015 INET_ADDR(rt.rt_dst) = 0;
1016 rt.rt_gateway.sa_family = AF_INET;
1017 INET_ADDR(rt.rt_gateway) = g;
1018 rt.rt_flags = RTF_GATEWAY;
1020 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1021 error("Can't add default route: %m");
1025 default_route_gateway = g;
1030 * cifdefaultroute - delete a default route through the address given.
1033 cifdefaultroute(u, l, g)
1039 bzero(&rt, sizeof(rt));
1040 rt.rt_dst.sa_family = AF_INET;
1041 INET_ADDR(rt.rt_dst) = 0;
1042 rt.rt_gateway.sa_family = AF_INET;
1043 INET_ADDR(rt.rt_gateway) = g;
1044 rt.rt_flags = RTF_GATEWAY;
1046 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
1047 error("Can't delete default route: %m");
1051 default_route_gateway = 0;
1056 * sifproxyarp - Make a proxy ARP entry for the peer.
1059 sifproxyarp(unit, hisaddr)
1063 struct arpreq arpreq;
1065 bzero(&arpreq, sizeof(arpreq));
1066 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
1069 arpreq.arp_pa.sa_family = AF_INET;
1070 INET_ADDR(arpreq.arp_pa) = hisaddr;
1071 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1072 if (ioctl(sockfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
1073 error("Couldn't set proxy ARP entry: %m");
1077 proxy_arp_addr = hisaddr;
1082 * cifproxyarp - Delete the proxy ARP entry for the peer.
1085 cifproxyarp(unit, hisaddr)
1089 struct arpreq arpreq;
1091 bzero(&arpreq, sizeof(arpreq));
1092 arpreq.arp_pa.sa_family = AF_INET;
1093 INET_ADDR(arpreq.arp_pa) = hisaddr;
1094 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1095 error("Couldn't delete proxy ARP entry: %m");
1104 * get_ether_addr - get the hardware address of an interface on the
1105 * the same subnet as ipaddr.
1110 get_ether_addr(ipaddr, hwaddr)
1112 struct sockaddr *hwaddr;
1114 struct ifreq *ifr, *ifend;
1115 u_int32_t ina, mask;
1118 struct ifreq ifs[MAX_IFS];
1121 ifc.ifc_len = sizeof(ifs);
1123 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1124 error("ioctl(SIOCGIFCONF): %m");
1129 * Scan through looking for an interface with an Internet
1130 * address on the same subnet as `ipaddr'.
1132 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1133 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1134 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1135 if (ifr->ifr_addr.sa_family == AF_INET) {
1138 * Check that the interface is up, and not point-to-point
1141 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1142 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1144 if ((ifreq.ifr_flags &
1145 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1146 != (IFF_UP|IFF_BROADCAST))
1150 * Get its netmask and check that it's on the right subnet.
1152 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1154 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1155 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1156 if ((ipaddr & mask) != (ina & mask))
1165 info("found interface %s for proxy arp", ifr->ifr_name);
1168 * Grab the physical address for this interface.
1170 if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
1171 error("Couldn't open /dev/nit: %m");
1174 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1175 if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
1176 || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
1177 error("Couldn't get hardware address for %s: %m",
1183 hwaddr->sa_family = AF_UNSPEC;
1184 memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
1190 * have_route_to - determine if the system has any route to
1191 * a given IP address.
1192 * For demand mode to work properly, we have to ignore routes
1193 * through our own interface.
1195 int have_route_to(addr)
1201 #define WTMPFILE "/usr/adm/wtmp"
1204 logwtmp(line, name, host)
1205 const char *line, *name, *host;
1211 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1213 if (!fstat(fd, &buf)) {
1214 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1215 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1216 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1217 (void)time(&ut.ut_time);
1218 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1219 (void)ftruncate(fd, buf.st_size);
1225 * Return user specified netmask, modified by any mask we might determine
1226 * for address `addr' (in network byte order).
1227 * Here we scan through the system's list of interfaces, looking for
1228 * any non-point-to-point interfaces which might appear to be on the same
1229 * network as `addr'. If we find any, we OR in their netmask to the
1230 * user-specified netmask.
1236 u_int32_t mask, nmask, ina;
1237 struct ifreq *ifr, *ifend, ifreq;
1241 if (IN_CLASSA(addr)) /* determine network mask for address class */
1242 nmask = IN_CLASSA_NET;
1243 else if (IN_CLASSB(addr))
1244 nmask = IN_CLASSB_NET;
1246 nmask = IN_CLASSC_NET;
1247 /* class D nets are disallowed by bad_ip_adrs */
1248 mask = netmask | htonl(nmask);
1251 * Scan through the system's network interfaces.
1253 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1254 ifc.ifc_req = alloca(ifc.ifc_len);
1255 if (ifc.ifc_req == 0)
1257 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1258 warn("Couldn't get system interface list: %m");
1261 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1262 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1264 * Check the interface's internet address.
1266 if (ifr->ifr_addr.sa_family != AF_INET)
1268 ina = INET_ADDR(ifr->ifr_addr);
1269 if ((ntohl(ina) & nmask) != (addr & nmask))
1272 * Check that the interface is up, and not point-to-point or loopback.
1274 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1275 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1277 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1281 * Get its netmask and OR it into our mask.
1283 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1285 mask |= INET_ADDR(ifreq.ifr_addr);
1292 strioctl(fd, cmd, ptr, ilen, olen)
1293 int fd, cmd, ilen, olen;
1296 struct strioctl str;
1302 if (ioctl(fd, I_STR, &str) == -1)
1304 if (str.ic_len != olen)
1305 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1306 olen, str.ic_len, cmd);
1311 * Use the hostid as part of the random number seed.
1320 * Code for locking/unlocking the serial device.
1321 * This code is derived from chat.c.
1324 #if !defined(HDB) && !defined(SUNOS3)
1325 #define HDB 1 /* ascii lock files are the default */
1331 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1333 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1335 #endif /* LOCK_DIR */
1337 static char *lock_file; /* name of lock file created */
1340 * lock - create a lock file for the named device.
1346 char hdb_lock_buffer[12];
1351 if ((p = strrchr(dev, '/')) != NULL)
1353 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1354 lock_file = malloc(l);
1355 if (lock_file == NULL)
1356 novm("lock file name");
1357 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1359 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1361 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1362 /* Read the lock file to find out who has the device locked */
1364 n = read(fd, hdb_lock_buffer, 11);
1366 hdb_lock_buffer[n] = 0;
1367 pid = atoi(hdb_lock_buffer);
1370 n = read(fd, &pid, sizeof(pid));
1373 error("Can't read pid from lock file %s", lock_file);
1376 if (kill(pid, 0) == -1 && errno == ESRCH) {
1377 /* pid no longer exists - remove the lock file */
1378 if (unlink(lock_file) == 0) {
1380 notice("Removed stale lock on %s (pid %d)",
1384 warn("Couldn't remove stale lock on %s",
1387 notice("Device %s is locked by pid %d",
1392 error("Can't create lock file %s: %m", lock_file);
1399 slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
1400 write(fd, hdb_lock_buffer, 11);
1403 write(fd, &pid, sizeof pid);
1411 * unlock - remove our lockfile
1424 * SunOS doesn't have strtoul :-(
1427 strtoul(str, ptr, base)
1431 return (unsigned long) strtol(str, ptr, base);
1437 extern char *sys_errlist[];
1438 extern int sys_nerr;
1444 static char unknown[32];
1446 if (n > 0 && n < sys_nerr)
1447 return sys_errlist[n];
1448 slprintf(unknown, sizeof(unknown), "Error %d", n);