2 * sys-ultrix.c - System-dependent procedures for setting up
3 * PPP interfaces on Ultrix systems.
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * Copyright (c) 1995 The Australian National University.
9 * Redistribution and use in source and binary forms are permitted
10 * provided that the above copyright notice and this paragraph are
11 * duplicated in all such forms and that any documentation,
12 * advertising materials, and other materials related to such
13 * distribution and use acknowledge that the software was developed
14 * by Carnegie Mellon University and The Australian National University.
15 * The names of the Universities may not be used to endorse or promote
16 * products derived from this software without specific prior written
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 #define RCSID "$Id: sys-ultrix.c,v 1.33 1999/08/13 06:46:20 paulus Exp $"
37 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <sys/ioctl.h>
42 #include <sys/errno.h>
46 #include <net/ppp_defs.h>
47 #include <net/if_ppp.h>
48 #include <net/route.h>
49 #include <netinet/in.h>
53 static const char rcsid[] = RCSID;
55 static int initdisc = -1; /* Initial TTY discipline for ppp_fd */
56 static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */
57 static int ppp_fd = -1; /* fd which is set to PPP discipline */
59 static int restore_term; /* 1 => we've munged the terminal */
60 static struct termios inittermios; /* Initial TTY termios */
61 static struct winsize wsinfo; /* Initial window size info */
63 static char *lock_file; /* name of lock file created */
65 static int loop_slave = -1;
66 static int loop_master;
67 static char loop_name[20];
69 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
71 static int sockfd; /* socket for doing interface ioctls */
73 static fd_set in_fds; /* set of fds that wait_input waits for */
74 static int max_in_fd; /* highest fd set in in_fds */
76 static int if_is_up; /* the interface is currently up */
77 static u_int32_t ifaddrs[2]; /* local and remote addresses */
78 static u_int32_t default_route_gateway; /* gateway addr for default route */
79 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
81 /* Prototypes for procedures local to this file. */
82 static int translate_speed __P((int));
83 static int baud_rate_of __P((int));
84 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
88 * sys_init - System-dependent initialization.
93 /* Get an internet socket for doing socket ioctl's on. */
94 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
95 fatal("Couldn't create IP socket: %m");
102 * sys_cleanup - restore any system state we modified before exiting:
103 * mark the interface down, delete default route and/or proxy arp entry.
104 * This shouldn't call die() because it's called from die().
112 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
113 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
114 && ((ifr.ifr_flags & IFF_UP) != 0)) {
115 ifr.ifr_flags &= ~IFF_UP;
116 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
120 cifaddr(0, ifaddrs[0], ifaddrs[1]);
121 if (default_route_gateway)
122 cifdefaultroute(0, 0, default_route_gateway);
124 cifproxyarp(0, proxy_arp_addr);
128 * sys_close - Clean up in a child process before execing.
134 if (loop_slave >= 0) {
141 * sys_check_options - check the options that the user specified
147 option_error("Sorry - demand-dialling is not supported under Ultrix\n");
155 * daemon - Detach us from the terminal session.
158 daemon(nochdir, noclose)
159 int nochdir, noclose;
163 if ((pid = fork()) < 0)
166 exit(0); /* parent dies */
171 fclose(stdin); /* don't need stdin, stdout, stderr */
180 * ppp_available - check whether the system has any ppp interfaces
181 * (in fact we check whether we can do an ioctl on ppp0).
188 extern char *no_ppp_msg;
190 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
191 return 1; /* can't tell */
193 strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
194 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
198 This system lacks kernel support for PPP. To include PPP support\n\
199 in the kernel, please follow the steps detailed in the README.ultrix\n\
200 file in the ppp-2.2 distribution.\n";
205 * establish_ppp - Turn the serial port into a ppp interface.
211 int pppdisc = PPPDISC;
215 * Save the old line discipline of fd, and set it to PPP.
217 if (ioctl(fd, TIOCGETD, &initdisc) < 0)
218 fatal("ioctl(TIOCGETD): %m");
219 if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
220 fatal("ioctl(TIOCSETD): %m");
223 * Find out which interface we were given.
225 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
226 fatal("ioctl(PPPIOCGUNIT): %m");
231 * Enable debug in the driver if requested.
234 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
235 warn("ioctl (PPPIOCGFLAGS): %m");
237 x |= (kdebugflag & 0xFF) * SC_DEBUG;
238 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
239 warn("ioctl(PPPIOCSFLAGS): %m");
244 * Set device for non-blocking reads.
246 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
247 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
248 warn("Couldn't set device to non-blocking mode: %m");
255 * restore_loop - reattach the ppp unit to the loopback.
263 * disestablish_ppp - Restore the serial port to normal operation.
264 * This shouldn't call die() because it's called from die().
270 /* Reset non-blocking mode on fd. */
271 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
272 warn("Couldn't restore device fd flags: %m");
275 /* Restore old line discipline. */
276 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
277 error("ioctl(TIOCSETD): %m");
285 * Check whether the link seems not to be 8-bit clean.
293 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
295 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
297 s = "bit 7 set to 1";
300 s = "bit 7 set to 0";
310 warn("Serial link is not 8-bit clean:");
311 warn("All received characters had %s", s);
318 * List of valid speeds.
321 int speed_int, speed_val;
393 * Translate from bits/second to a speed_t.
399 struct speed *speedp;
403 for (speedp = speeds; speedp->speed_int; speedp++)
404 if (bps == speedp->speed_int)
405 return speedp->speed_val;
406 warn("speed %d not supported", bps);
411 * Translate from a speed_t to bits/second.
417 struct speed *speedp;
421 for (speedp = speeds; speedp->speed_int; speedp++)
422 if (speed == speedp->speed_val)
423 return speedp->speed_int;
428 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
429 * at the requested speed, etc. If `local' is true, set CLOCAL
430 * regardless of whether the modem option was specified.
433 set_up_tty(fd, local)
439 if (tcgetattr(fd, &tios) < 0)
440 fatal("tcgetattr: %m");
444 ioctl(fd, TIOCGWINSZ, &wsinfo);
447 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
449 if (crtscts > 0 && !local)
450 tios.c_cflag |= CRTSCTS;
451 else if (crtscts < 0)
452 tios.c_cflag &= ~CRTSCTS;
455 tios.c_cflag |= CS8 | CREAD | HUPCL;
457 tios.c_cflag |= CLOCAL;
458 tios.c_iflag = IGNBRK | IGNPAR;
462 tios.c_cc[VTIME] = 0;
465 tios.c_iflag |= IXON | IXOFF;
466 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
467 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
470 speed = translate_speed(inspeed);
472 cfsetospeed(&tios, speed);
473 cfsetispeed(&tios, speed);
475 speed = cfgetospeed(&tios);
477 * We can't proceed if the serial port speed is B0,
478 * since that implies that the serial port is disabled.
481 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
484 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
485 fatal("tcsetattr: %m");
488 if (ioctl(fd, (crtscts > 0 || modem)? TIOCMODEM: TIOCNMODEM, &x) < 0)
489 warn("TIOC(N)MODEM: %m");
490 if (ioctl(fd, (local || !modem)? TIOCNCAR: TIOCCAR) < 0)
491 warn("TIOC(N)CAR: %m");
493 baud_rate = inspeed = baud_rate_of(speed);
498 * restore_tty - restore the terminal to the saved settings.
505 if (!default_device) {
507 * Turn off echoing, because otherwise we can get into
508 * a loop with the tty and the modem echoing to each other.
509 * We presume we are the sole user of this tty device, so
510 * when we close it, it will revert to its defaults anyway.
512 inittermios.c_lflag &= ~(ECHO | ECHONL);
514 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
516 warn("tcsetattr: %m");
517 ioctl(fd, TIOCSWINSZ, &wsinfo);
523 * setdtr - control the DTR line on the serial port.
524 * This is called from die(), so it shouldn't call die().
530 int modembits = TIOCM_DTR;
532 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
537 * open_ppp_loopback - open the device we use for getting
538 * packets in demand mode, and connect it to a ppp interface.
539 * Here we use would use a pty, except that Ultrix ptys are brain-dead.
544 fatal("open_ppp_loopback called!");
545 /* return loop_master; */
550 * output - Output PPP packet.
559 dbglog("sent %P", p, len);
561 if (write(ttyfd, p, len) < 0) {
569 * wait_input - wait until there is data available,
570 * for the length of time specified by *timo (indefinite
575 struct timeval *timo;
581 n = select(ttyfd+1, &ready, NULL, &ready, timo);
582 if (n < 0 && errno != EINTR)
588 * add_fd - add an fd to the set that wait_input waits for.
599 * remove_fd - remove an fd from the set that wait_input waits for.
609 * wait_loop_output - wait until there is data available on the
610 * loopback, for the length of time specified by *timo (indefinite
614 wait_loop_output(timo)
615 struct timeval *timo;
622 * wait_time - wait for a given length of time or until a
623 * signal is received.
627 struct timeval *timo;
631 n = select(0, NULL, NULL, NULL, timo);
632 if (n < 0 && errno != EINTR)
638 * read_packet - get a PPP packet from the serial device.
646 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
647 if (errno == EWOULDBLOCK || errno == EINTR)
649 fatal("read(fd): %m");
656 * get_loop_output - read characters from the loopback, form them
657 * into frames, and detect when we want to bring the real link up.
658 * Return value is 1 if we need to bring up the link, 0 otherwise.
668 * ppp_send_config - configure the transmit characteristics of
672 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
679 if (ioctl(ppp_fd, PPPIOCSMTU, &mtu) < 0)
680 fatal("ioctl(PPPIOCSMTU): %m");
682 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
683 fatal("ioctl(PPPIOCSASYNCMAP): %m");
685 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
686 fatal("ioctl (PPPIOCGFLAGS): %m");
687 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
688 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
689 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
690 fatal("ioctl(PPPIOCSFLAGS): %m");
695 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
698 ppp_set_xaccm(unit, accm)
702 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
703 warn("ioctl(set extended ACCM): %m");
708 * ppp_recv_config - configure the receive-side characteristics of
712 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
719 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
720 fatal("ioctl(PPPIOCSMRU): %m");
721 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
722 fatal("ioctl(PPPIOCSRASYNCMAP): %m");
723 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
724 fatal("ioctl (PPPIOCGFLAGS): %m");
725 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
726 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
727 fatal("ioctl(PPPIOCSFLAGS): %m");
731 * ccp_test - ask kernel whether a given compression method
732 * is acceptable for use. Returns 1 if the method and parameters
733 * are OK, 0 if the method is known but the parameters are not OK
734 * (e.g. code size should be reduced), or -1 if the method is unknown.
737 ccp_test(unit, opt_ptr, opt_len, for_transmit)
738 int unit, opt_len, for_transmit;
741 struct ppp_option_data data;
744 data.length = opt_len;
745 data.transmit = for_transmit;
746 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
748 return (errno == ENOBUFS)? 0: -1;
752 * ccp_flags_set - inform kernel about the current state of CCP.
755 ccp_flags_set(unit, isopen, isup)
756 int unit, isopen, isup;
760 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
761 error("ioctl (PPPIOCGFLAGS): %m");
764 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
765 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
766 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
767 error("ioctl(PPPIOCSFLAGS): %m");
771 * ccp_fatal_error - returns 1 if decompression was disabled as a
772 * result of an error detected after decompression of a packet,
773 * 0 otherwise. This is necessary because of patent nonsense.
776 ccp_fatal_error(unit)
781 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
782 error("ioctl(PPPIOCGFLAGS): %m");
785 return x & SC_DC_FERROR;
789 * get_idle_time - return how long the link has been idle.
796 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
800 * get_ppp_stats - return statistics for the link.
803 get_ppp_stats(u, stats)
805 struct pppd_stats *stats;
807 struct ifpppstatsreq req;
809 memset (&req, 0, sizeof (req));
810 strlcpy(req.ifr_name, interface, sizeof(req.ifr_name));
811 if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) {
812 error("Couldn't get PPP statistics: %m");
815 stats->bytes_in = req.stats.p.ppp_ibytes;
816 stats->bytes_out = req.stats.p.ppp_obytes;
822 * sifvjcomp - config tcp header compression
825 sifvjcomp(u, vjcomp, cidcomp, maxcid)
826 int u, vjcomp, cidcomp, maxcid;
830 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
831 error("ioctl (PPPIOCGFLAGS): %m");
834 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
835 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
836 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
837 error("ioctl(PPPIOCSFLAGS): %m");
840 if (ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
841 error("ioctl(PPPIOCSFLAGS): %m");
848 * sifup - Config the interface up and enable IP packets to pass.
856 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
857 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
858 error("ioctl (SIOCGIFFLAGS): %m");
861 ifr.ifr_flags |= IFF_UP;
862 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
863 error("ioctl(SIOCSIFFLAGS): %m");
871 * sifnpmode - Set the mode for handling packets for a given NP.
874 sifnpmode(u, proto, mode)
881 npi.protocol = proto;
883 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
884 error("ioctl(set NP %d mode to %d): %m", proto, mode);
891 * sifdown - Config the interface down and disable IP.
902 npi.protocol = PPP_IP;
903 npi.mode = NPMODE_ERROR;
904 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
905 /* ignore errors, because ppp_fd might have been closed by now. */
907 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
908 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
909 error("ioctl (SIOCGIFFLAGS): %m");
912 ifr.ifr_flags &= ~IFF_UP;
913 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
914 error("ioctl(SIOCSIFFLAGS): %m");
923 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
926 #define SET_SA_FAMILY(addr, family) \
927 BZERO((char *) &(addr), sizeof(addr)); \
928 addr.sa_family = (family);
931 * sifaddr - Config the interface IP addresses and netmask.
942 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
943 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
945 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
946 info("Setting interface mask to %s\n", ip_ntoa(m));
947 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
948 error("ioctl(SIOCSIFNETMASK): %m");
952 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
953 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
954 error("ioctl(SIOCSIFADDR): %m");
957 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
958 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
959 error("ioctl(SIOCSIFDSTADDR): %m");
968 * cifaddr - Clear the interface IP addresses, and delete routes
969 * through the interface if possible.
979 BZERO(&rt, sizeof(rt));
980 SET_SA_FAMILY(rt.rt_dst, AF_INET);
981 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
982 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
983 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
984 rt.rt_flags = RTF_HOST;
985 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
986 error("ioctl(SIOCDELRT): %m");
993 * sifdefaultroute - assign a default route through the address given.
996 sifdefaultroute(u, l, g)
1002 BZERO(&rt, sizeof(rt));
1003 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1004 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1005 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1006 rt.rt_flags = RTF_GATEWAY;
1007 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1008 error("default route ioctl(SIOCADDRT): %m");
1011 default_route_gateway = g;
1016 * cifdefaultroute - delete a default route through the address given.
1019 cifdefaultroute(u, l, g)
1025 BZERO(&rt, sizeof(rt));
1026 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1027 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1028 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1029 rt.rt_flags = RTF_GATEWAY;
1030 if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
1031 warn("default route ioctl(SIOCDELRT): %m");
1032 default_route_gateway = 0;
1037 * sifproxyarp - Make a proxy ARP entry for the peer.
1040 sifproxyarp(unit, hisaddr)
1044 struct arpreq arpreq;
1046 BZERO(&arpreq, sizeof(arpreq));
1049 * Get the hardware address of an interface on the same subnet
1050 * as our local address.
1052 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1053 error("Cannot determine ethernet address for proxy ARP");
1057 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1058 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1059 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1060 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1061 error("Couldn't add proxy arp entry: %m");
1065 proxy_arp_addr = hisaddr;
1070 * cifproxyarp - Delete the proxy ARP entry for the peer.
1073 cifproxyarp(unit, hisaddr)
1077 struct arpreq arpreq;
1079 BZERO(&arpreq, sizeof(arpreq));
1080 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1081 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1082 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1083 warn("Couldn't delete proxy arp entry: %m");
1091 * get_ether_addr - get the hardware address of an interface on the
1092 * the same subnet as ipaddr.
1097 get_ether_addr(ipaddr, hwaddr)
1099 struct sockaddr *hwaddr;
1101 struct ifreq *ifr, *ifend;
1102 u_int32_t ina, mask;
1105 struct ifreq ifs[MAX_IFS];
1106 struct ifdevea ifdevea;
1108 ifc.ifc_len = sizeof(ifs);
1110 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1111 error("ioctl(SIOCGIFCONF): %m");
1116 * Scan through looking for an interface with an Internet
1117 * address on the same subnet as `ipaddr'.
1119 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1120 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1121 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1122 if (ifr->ifr_addr.sa_family == AF_INET) {
1123 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1124 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1126 * Check that the interface is up, and not point-to-point
1129 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1131 if ((ifreq.ifr_flags &
1132 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1133 != (IFF_UP|IFF_BROADCAST))
1136 * Get its netmask and check that it's on the right subnet.
1138 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1140 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1141 if ((ipaddr & mask) != (ina & mask))
1150 info("found interface %s for proxy arp", ifr->ifr_name);
1153 * Grab the physical address for this interface.
1155 strlcpy(ifdevea.ifr_name, ifr->ifr_name, sizeof(ifdevea.ifr_name));
1156 if (ioctl(sockfd, SIOCRPHYSADDR, &ifdevea) < 0) {
1157 error("Couldn't get h/w address for %s: %m", ifr->ifr_name);
1161 hwaddr->sa_family = AF_UNSPEC;
1162 BCOPY(ifdevea.current_pa, hwaddr->sa_data, 6);
1167 * Return user specified netmask, modified by any mask we might determine
1168 * for address `addr' (in network byte order).
1169 * Here we scan through the system's list of interfaces, looking for
1170 * any non-point-to-point interfaces which might appear to be on the same
1171 * network as `addr'. If we find any, we OR in their netmask to the
1172 * user-specified netmask.
1178 u_int32_t mask, nmask, ina;
1179 struct ifreq *ifr, *ifend, ifreq;
1181 struct ifreq ifs[MAX_IFS];
1184 if (IN_CLASSA(addr)) /* determine network mask for address class */
1185 nmask = IN_CLASSA_NET;
1186 else if (IN_CLASSB(addr))
1187 nmask = IN_CLASSB_NET;
1189 nmask = IN_CLASSC_NET;
1190 /* class D nets are disallowed by bad_ip_adrs */
1191 mask = netmask | htonl(nmask);
1194 * Scan through the system's network interfaces.
1196 ifc.ifc_len = sizeof(ifs);
1198 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1199 warn("ioctl(SIOCGIFCONF): %m");
1202 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1203 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1204 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1206 * Check the interface's internet address.
1208 if (ifr->ifr_addr.sa_family != AF_INET)
1210 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1211 if ((ntohl(ina) & nmask) != (addr & nmask))
1214 * Check that the interface is up, and not point-to-point or loopback.
1216 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1217 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1219 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1223 * Get its netmask and OR it into our mask.
1225 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1227 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1234 * have_route_to - determine if the system has any route to
1235 * a given IP address.
1236 * For demand mode to work properly, we have to ignore routes
1237 * through our own interface.
1239 int have_route_to(u_int32_t addr)
1246 * Use the hostid as part of the random number seed.
1256 Seems like strdup() is not part of string package in Ultrix.
1257 If I understood the man-page on the sun this should work.
1262 char *strdup( in ) char *in;
1265 if(! (dup = (char *) malloc( strlen( in ) +1 ))) return NULL;
1266 (void) strcpy( dup, in );
1271 * This logwtmp() implementation is subject to the following copyright:
1273 * Copyright (c) 1988 The Regents of the University of California.
1274 * All rights reserved.
1276 * Redistribution and use in source and binary forms are permitted
1277 * provided that the above copyright notice and this paragraph are
1278 * duplicated in all such forms and that any documentation,
1279 * advertising materials, and other materials related to such
1280 * distribution and use acknowledge that the software was developed
1281 * by the University of California, Berkeley. The name of the
1282 * University may not be used to endorse or promote products derived
1283 * from this software without specific prior written permission.
1284 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1285 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1286 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1289 #define WTMPFILE "/usr/adm/wtmp"
1292 logwtmp(line, name, host)
1293 const char *line, *name, *host;
1299 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1301 if (!fstat(fd, &buf)) {
1302 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1303 strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1304 strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1305 (void)time(&ut.ut_time);
1306 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1307 (void)ftruncate(fd, buf.st_size);
1314 * Routines for locking and unlocking the serial device, moved here
1318 #define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1321 * lock - create a lock file for the named device
1331 if ((p = strrchr(dev, '/')) != NULL)
1333 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1334 lock_file = malloc(l);
1335 if (lock_file == NULL)
1336 novm("lock file name");
1337 slprintf(lock_file, l, "%s%s, LOCK_PREFIX, dev);
1339 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1341 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1342 /* Read the lock file to find out who has the device locked */
1343 n = read(fd, &pid, sizeof(pid));
1345 error("Can't read pid from lock file %s", lock_file);
1348 if (kill(pid, 0) == -1 && errno == ESRCH) {
1349 /* pid no longer exists - remove the lock file */
1350 if (unlink(lock_file) == 0) {
1352 notice("Removed stale lock on %s (pid %d)",
1356 warn("Couldn't remove stale lock on %s",
1359 notice("Device %s is locked by pid %d",
1364 error("Can't create lock file %s: %m", lock_file);
1371 write(fd, &pid, sizeof pid);
1378 * unlock - remove our lockfile