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.
24 static char rcsid[] = "$Id: sys-ultrix.c,v 1.26 1999/03/16 02:57:08 paulus Exp $";
39 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <sys/ioctl.h>
44 #include <sys/errno.h>
48 #include <net/ppp_defs.h>
49 #include <net/if_ppp.h>
50 #include <net/route.h>
51 #include <netinet/in.h>
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 error("Couldn't create IP socket: %m");
104 * sys_cleanup - restore any system state we modified before exiting:
105 * mark the interface down, delete default route and/or proxy arp entry.
106 * This should call die() because it's called from die().
114 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
115 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
116 && ((ifr.ifr_flags & IFF_UP) != 0)) {
117 ifr.ifr_flags &= ~IFF_UP;
118 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
122 cifaddr(0, ifaddrs[0], ifaddrs[1]);
123 if (default_route_gateway)
124 cifdefaultroute(0, 0, default_route_gateway);
126 cifproxyarp(0, proxy_arp_addr);
130 * sys_close - Clean up in a child process before execing.
136 if (loop_slave >= 0) {
143 * sys_check_options - check the options that the user specified
149 option_error("Sorry - demand-dialling is not supported under Ultrix\n");
157 * daemon - Detach us from the terminal session.
160 daemon(nochdir, noclose)
161 int nochdir, noclose;
165 if ((pid = fork()) < 0)
168 exit(0); /* parent dies */
173 fclose(stdin); /* don't need stdin, stdout, stderr */
181 * ppp_available - check whether the system has any ppp interfaces
182 * (in fact we check whether we can do an ioctl on ppp0).
189 extern char *no_ppp_msg;
191 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
192 return 1; /* can't tell */
194 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), "ppp0");
195 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
199 This system lacks kernel support for PPP. To include PPP support\n\
200 in the kernel, please follow the steps detailed in the README.ultrix\n\
201 file in the ppp-2.2 distribution.\n";
206 * establish_ppp - Turn the serial port into a ppp interface.
212 int pppdisc = PPPDISC;
216 * Save the old line discipline of fd, and set it to PPP.
218 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
219 error("ioctl(TIOCGETD): %m");
222 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
223 error("ioctl(TIOCSETD): %m");
228 * Find out which interface we were given.
230 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
231 error("ioctl(PPPIOCGUNIT): %m");
238 * Enable debug in the driver if requested.
241 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
242 warn("ioctl (PPPIOCGFLAGS): %m");
244 x |= (kdebugflag & 0xFF) * SC_DEBUG;
245 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
246 warn("ioctl(PPPIOCSFLAGS): %m");
251 * Set device for non-blocking reads.
253 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
254 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
255 warn("Couldn't set device to non-blocking mode: %m");
260 * restore_loop - reattach the ppp unit to the loopback.
268 * disestablish_ppp - Restore the serial port to normal operation.
269 * This shouldn't call die() because it's called from die().
275 /* Reset non-blocking mode on fd. */
276 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
277 warn("Couldn't restore device fd flags: %m");
280 /* Restore old line discipline. */
281 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
282 error("ioctl(TIOCSETD): %m");
290 * Check whether the link seems not to be 8-bit clean.
298 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
300 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
302 s = "bit 7 set to 1";
305 s = "bit 7 set to 0";
315 warn("Serial link is not 8-bit clean:");
316 warn("All received characters had %s", s);
323 * List of valid speeds.
326 int speed_int, speed_val;
398 * Translate from bits/second to a speed_t.
404 struct speed *speedp;
408 for (speedp = speeds; speedp->speed_int; speedp++)
409 if (bps == speedp->speed_int)
410 return speedp->speed_val;
411 warn("speed %d not supported", bps);
416 * Translate from a speed_t to bits/second.
422 struct speed *speedp;
426 for (speedp = speeds; speedp->speed_int; speedp++)
427 if (speed == speedp->speed_val)
428 return speedp->speed_int;
433 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
434 * at the requested speed, etc. If `local' is true, set CLOCAL
435 * regardless of whether the modem option was specified.
438 set_up_tty(fd, local)
444 if (tcgetattr(fd, &tios) < 0) {
445 error("tcgetattr: %m");
451 ioctl(fd, TIOCGWINSZ, &wsinfo);
454 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
456 if (crtscts > 0 && !local)
457 tios.c_cflag |= CRTSCTS;
458 else if (crtscts < 0)
459 tios.c_cflag &= ~CRTSCTS;
462 tios.c_cflag |= CS8 | CREAD | HUPCL;
464 tios.c_cflag |= CLOCAL;
465 tios.c_iflag = IGNBRK | IGNPAR;
469 tios.c_cc[VTIME] = 0;
472 tios.c_iflag |= IXON | IXOFF;
473 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
474 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
477 speed = translate_speed(inspeed);
479 cfsetospeed(&tios, speed);
480 cfsetispeed(&tios, speed);
482 speed = cfgetospeed(&tios);
484 * We can't proceed if the serial port speed is B0,
485 * since that implies that the serial port is disabled.
488 error("Baud rate for %s is 0; need explicit baud rate",
494 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
495 error("tcsetattr: %m");
500 if (ioctl(fd, (crtscts > 0 || modem)? TIOCMODEM: TIOCNMODEM, &x) < 0)
501 warn("TIOC(N)MODEM: %m");
502 if (ioctl(fd, (local || !modem)? TIOCNCAR: TIOCCAR) < 0)
503 warn("TIOC(N)CAR: %m");
505 baud_rate = inspeed = baud_rate_of(speed);
510 * restore_tty - restore the terminal to the saved settings.
517 if (!default_device) {
519 * Turn off echoing, because otherwise we can get into
520 * a loop with the tty and the modem echoing to each other.
521 * We presume we are the sole user of this tty device, so
522 * when we close it, it will revert to its defaults anyway.
524 inittermios.c_lflag &= ~(ECHO | ECHONL);
526 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
528 warn("tcsetattr: %m");
529 ioctl(fd, TIOCSWINSZ, &wsinfo);
530 restore_term = FALSE;
535 * setdtr - control the DTR line on the serial port.
536 * This is called from die(), so it shouldn't call die().
542 int modembits = TIOCM_DTR;
544 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
549 * open_ppp_loopback - open the device we use for getting
550 * packets in demand mode, and connect it to a ppp interface.
551 * Here we use would use a pty, except that Ultrix ptys are brain-dead.
556 error("open_ppp_loopback called!");
562 * output - Output PPP packet.
571 dbglog("sent %P", p, len);
573 if (write(ttyfd, p, len) < 0) {
581 * wait_input - wait until there is data available,
582 * for the length of time specified by *timo (indefinite
587 struct timeval *timo;
593 n = select(ttyfd+1, &ready, NULL, &ready, timo);
594 if (n < 0 && errno != EINTR)
600 * add_fd - add an fd to the set that wait_input waits for.
610 * remove_fd - remove an fd from the set that wait_input waits for.
612 void remove_fd(int fd)
619 * wait_loop_output - wait until there is data available on the
620 * loopback, for the length of time specified by *timo (indefinite
624 wait_loop_output(timo)
625 struct timeval *timo;
632 * wait_time - wait for a given length of time or until a
633 * signal is received.
637 struct timeval *timo;
641 n = select(0, NULL, NULL, NULL, timo);
642 if (n < 0 && errno != EINTR) {
650 * read_packet - get a PPP packet from the serial device.
658 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
659 if (errno == EWOULDBLOCK || errno == EINTR)
661 error("read(fd): %m");
669 * get_loop_output - read characters from the loopback, form them
670 * into frames, and detect when we want to bring the real link up.
671 * Return value is 1 if we need to bring up the link, 0 otherwise.
681 * ppp_send_config - configure the transmit characteristics of
685 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
692 if (ioctl(ppp_fd, PPPIOCSMTU, &mtu) < 0) {
693 error("ioctl(PPPIOCSMTU): %m");
697 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
698 error("ioctl(PPPIOCSASYNCMAP): %m");
702 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
703 error("ioctl (PPPIOCGFLAGS): %m");
706 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
707 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
708 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
709 error("ioctl(PPPIOCSFLAGS): %m");
716 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
719 ppp_set_xaccm(unit, accm)
723 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
724 warn("ioctl(set extended ACCM): %m");
729 * ppp_recv_config - configure the receive-side characteristics of
733 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
740 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
741 error("ioctl(PPPIOCSMRU): %m");
744 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
745 error("ioctl(PPPIOCSRASYNCMAP): %m");
748 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
749 error("ioctl (PPPIOCGFLAGS): %m");
752 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
753 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
754 error("ioctl(PPPIOCSFLAGS): %m");
760 * ccp_test - ask kernel whether a given compression method
761 * is acceptable for use. Returns 1 if the method and parameters
762 * are OK, 0 if the method is known but the parameters are not OK
763 * (e.g. code size should be reduced), or -1 if the method is unknown.
766 ccp_test(unit, opt_ptr, opt_len, for_transmit)
767 int unit, opt_len, for_transmit;
770 struct ppp_option_data data;
773 data.length = opt_len;
774 data.transmit = for_transmit;
775 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
777 return (errno == ENOBUFS)? 0: -1;
781 * ccp_flags_set - inform kernel about the current state of CCP.
784 ccp_flags_set(unit, isopen, isup)
785 int unit, isopen, isup;
789 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
790 error("ioctl (PPPIOCGFLAGS): %m");
793 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
794 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
795 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
796 error("ioctl(PPPIOCSFLAGS): %m");
800 * ccp_fatal_error - returns 1 if decompression was disabled as a
801 * result of an error detected after decompression of a packet,
802 * 0 otherwise. This is necessary because of patent nonsense.
805 ccp_fatal_error(unit)
810 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
811 error("ioctl(PPPIOCGFLAGS): %m");
814 return x & SC_DC_FERROR;
818 * get_idle_time - return how long the link has been idle.
825 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
830 * sifvjcomp - config tcp header compression
833 sifvjcomp(u, vjcomp, cidcomp, maxcid)
834 int u, vjcomp, cidcomp, maxcid;
838 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
839 error("ioctl (PPPIOCGFLAGS): %m");
842 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
843 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
844 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
845 error("ioctl(PPPIOCSFLAGS): %m");
848 if (ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
849 error("ioctl(PPPIOCSFLAGS): %m");
856 * sifup - Config the interface up and enable IP packets to pass.
864 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
865 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
866 error("ioctl (SIOCGIFFLAGS): %m");
869 ifr.ifr_flags |= IFF_UP;
870 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
871 error("ioctl(SIOCSIFFLAGS): %m");
879 * sifnpmode - Set the mode for handling packets for a given NP.
882 sifnpmode(u, proto, mode)
889 npi.protocol = proto;
891 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
892 error("ioctl(set NP %d mode to %d): %m", proto, mode);
899 * sifdown - Config the interface down and disable IP.
910 npi.protocol = PPP_IP;
911 npi.mode = NPMODE_ERROR;
912 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
913 /* ignore errors, because ppp_fd might have been closed by now. */
915 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
916 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
917 error("ioctl (SIOCGIFFLAGS): %m");
920 ifr.ifr_flags &= ~IFF_UP;
921 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
922 error("ioctl(SIOCSIFFLAGS): %m");
931 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
934 #define SET_SA_FAMILY(addr, family) \
935 BZERO((char *) &(addr), sizeof(addr)); \
936 addr.sa_family = (family);
939 * sifaddr - Config the interface IP addresses and netmask.
950 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
951 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
953 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
954 info("Setting interface mask to %s\n", ip_ntoa(m));
955 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
956 error("ioctl(SIOCSIFNETMASK): %m");
960 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
961 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
962 error("ioctl(SIOCSIFADDR): %m");
965 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
966 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
967 error("ioctl(SIOCSIFDSTADDR): %m");
976 * cifaddr - Clear the interface IP addresses, and delete routes
977 * through the interface if possible.
987 BZERO(&rt, sizeof(rt));
988 SET_SA_FAMILY(rt.rt_dst, AF_INET);
989 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
990 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
991 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
992 rt.rt_flags = RTF_HOST;
993 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
994 error("ioctl(SIOCDELRT): %m");
1001 * sifdefaultroute - assign a default route through the address given.
1004 sifdefaultroute(u, l, g)
1010 BZERO(&rt, sizeof(rt));
1011 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1012 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1013 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1014 rt.rt_flags = RTF_GATEWAY;
1015 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1016 error("default route ioctl(SIOCADDRT): %m");
1019 default_route_gateway = g;
1024 * cifdefaultroute - delete a default route through the address given.
1027 cifdefaultroute(u, l, g)
1033 BZERO(&rt, sizeof(rt));
1034 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1035 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1036 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1037 rt.rt_flags = RTF_GATEWAY;
1038 if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
1039 warn("default route ioctl(SIOCDELRT): %m");
1040 default_route_gateway = 0;
1045 * sifproxyarp - Make a proxy ARP entry for the peer.
1048 sifproxyarp(unit, hisaddr)
1052 struct arpreq arpreq;
1054 BZERO(&arpreq, sizeof(arpreq));
1057 * Get the hardware address of an interface on the same subnet
1058 * as our local address.
1060 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1061 error("Cannot determine ethernet address for proxy ARP");
1065 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1066 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1067 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1068 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1069 error("Couldn't add proxy arp entry: %m");
1073 proxy_arp_addr = hisaddr;
1078 * cifproxyarp - Delete the proxy ARP entry for the peer.
1081 cifproxyarp(unit, hisaddr)
1085 struct arpreq arpreq;
1087 BZERO(&arpreq, sizeof(arpreq));
1088 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1089 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1090 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1091 warn("Couldn't delete proxy arp entry: %m");
1099 * get_ether_addr - get the hardware address of an interface on the
1100 * the same subnet as ipaddr.
1105 get_ether_addr(ipaddr, hwaddr)
1107 struct sockaddr *hwaddr;
1109 struct ifreq *ifr, *ifend;
1110 u_int32_t ina, mask;
1113 struct ifreq ifs[MAX_IFS];
1114 struct ifdevea ifdevea;
1116 ifc.ifc_len = sizeof(ifs);
1118 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1119 error("ioctl(SIOCGIFCONF): %m");
1124 * Scan through looking for an interface with an Internet
1125 * address on the same subnet as `ipaddr'.
1127 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1128 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1129 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1130 if (ifr->ifr_addr.sa_family == AF_INET) {
1131 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1132 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1134 * Check that the interface is up, and not point-to-point
1137 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1139 if ((ifreq.ifr_flags &
1140 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1141 != (IFF_UP|IFF_BROADCAST))
1144 * Get its netmask and check that it's on the right subnet.
1146 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1148 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1149 if ((ipaddr & mask) != (ina & mask))
1158 info("found interface %s for proxy arp", ifr->ifr_name);
1161 * Grab the physical address for this interface.
1163 strlcpy(ifdevea.ifr_name, sizeof(ifdevea.ifr_name), ifr->ifr_name);
1164 if (ioctl(sockfd, SIOCRPHYSADDR, &ifdevea) < 0) {
1165 error("Couldn't get h/w address for %s: %m", ifr->ifr_name);
1169 hwaddr->sa_family = AF_UNSPEC;
1170 BCOPY(ifdevea.current_pa, hwaddr->sa_data, 6);
1175 * Return user specified netmask, modified by any mask we might determine
1176 * for address `addr' (in network byte order).
1177 * Here we scan through the system's list of interfaces, looking for
1178 * any non-point-to-point interfaces which might appear to be on the same
1179 * network as `addr'. If we find any, we OR in their netmask to the
1180 * user-specified netmask.
1186 u_int32_t mask, nmask, ina;
1187 struct ifreq *ifr, *ifend, ifreq;
1189 struct ifreq ifs[MAX_IFS];
1192 if (IN_CLASSA(addr)) /* determine network mask for address class */
1193 nmask = IN_CLASSA_NET;
1194 else if (IN_CLASSB(addr))
1195 nmask = IN_CLASSB_NET;
1197 nmask = IN_CLASSC_NET;
1198 /* class D nets are disallowed by bad_ip_adrs */
1199 mask = netmask | htonl(nmask);
1202 * Scan through the system's network interfaces.
1204 ifc.ifc_len = sizeof(ifs);
1206 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1207 warn("ioctl(SIOCGIFCONF): %m");
1210 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1211 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1212 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1214 * Check the interface's internet address.
1216 if (ifr->ifr_addr.sa_family != AF_INET)
1218 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1219 if ((ntohl(ina) & nmask) != (addr & nmask))
1222 * Check that the interface is up, and not point-to-point or loopback.
1224 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1225 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1227 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1231 * Get its netmask and OR it into our mask.
1233 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1235 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1242 * have_route_to - determine if the system has any route to
1243 * a given IP address.
1244 * For demand mode to work properly, we have to ignore routes
1245 * through our own interface.
1247 int have_route_to(u_int32_t addr)
1254 * Use the hostid as part of the random number seed.
1264 Seems like strdup() is not part of string package in Ultrix.
1265 If I understood the man-page on the sun this should work.
1270 char *strdup( in ) char *in;
1273 if(! (dup = (char *) malloc( strlen( in ) +1 ))) return NULL;
1274 (void) strcpy( dup, in );
1279 * This logwtmp() implementation is subject to the following copyright:
1281 * Copyright (c) 1988 The Regents of the University of California.
1282 * All rights reserved.
1284 * Redistribution and use in source and binary forms are permitted
1285 * provided that the above copyright notice and this paragraph are
1286 * duplicated in all such forms and that any documentation,
1287 * advertising materials, and other materials related to such
1288 * distribution and use acknowledge that the software was developed
1289 * by the University of California, Berkeley. The name of the
1290 * University may not be used to endorse or promote products derived
1291 * from this software without specific prior written permission.
1292 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1293 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1294 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1297 #define WTMPFILE "/usr/adm/wtmp"
1300 logwtmp(line, name, host)
1301 const char *line, *name, *host;
1307 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1309 if (!fstat(fd, &buf)) {
1310 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1311 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1312 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1313 (void)time(&ut.ut_time);
1314 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1315 (void)ftruncate(fd, buf.st_size);
1321 * Routines for locking and unlocking the serial device, moved here
1325 #define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1328 * lock - create a lock file for the named device
1338 if ((p = strrchr(dev, '/')) != NULL)
1340 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1341 lock_file = malloc(l);
1342 if (lock_file == NULL)
1343 novm("lock file name");
1344 slprintf(lock_file, l, "%s%s, LOCK_PREFIX, dev);
1346 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1348 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1349 /* Read the lock file to find out who has the device locked */
1350 n = read(fd, &pid, sizeof(pid));
1352 error("Can't read pid from lock file %s", lock_file);
1355 if (kill(pid, 0) == -1 && errno == ESRCH) {
1356 /* pid no longer exists - remove the lock file */
1357 if (unlink(lock_file) == 0) {
1359 notice("Removed stale lock on %s (pid %d)",
1363 warn("Couldn't remove stale lock on %s",
1366 notice("Device %s is locked by pid %d",
1371 error("Can't create lock file %s: %m", lock_file);
1378 write(fd, &pid, sizeof pid);
1385 * unlock - remove our lockfile