2 * sys-next.c - System-dependent procedures for setting up
3 * PPP interfaces on NeXT 3.2/3.3 systems
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * Copyright (c) 1994 Philippe-Andre Prindeville.
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. The name of the
15 * University may not be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
19 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 static char rcsid[] = "$Id: sys-NeXT.c,v 1.17 1999/03/22 05:55:36 paulus Exp $";
33 #include <sys/types.h>
35 #include <sys/socket.h>
36 #include <sys/ioctl.h>
38 #include <sys/errno.h>
40 #include <sys/fcntl.h>
43 #include <net/ppp_defs.h>
44 #include <net/if_ppp.h>
46 #include <netinet/in.h>
47 #include <netinet/in_systm.h>
48 #include <netinet/in_var.h>
49 #if !(NS_TARGET >= 40)
50 /* XXX get an error "duplicate member ip_v under 4.1 GAMMA */
51 #include <netinet/ip.h>
52 #endif /* NS_TARGET */
53 #include <netinet/if_ether.h>
54 #include <net/route.h>
55 #include <netinet/in.h>
57 #include <netinfo/ni.h>
61 static int initdisc = -1; /* Initial TTY discipline */
62 static int initfdflags = -1; /* Initial file descriptor flags for fd */
63 static int ppp_fd = -1; /* fd which is set to PPP discipline */
64 static int loop_slave = -1;
65 static int loop_master;
66 static char loop_name[20];
68 static fd_set in_fds; /* set of fds that wait_input waits for */
69 static int max_in_fd; /* highest fd set in in_fds */
73 static int restore_term; /* 1 => we've munged the terminal */
74 static struct termios inittermios; /* Initial TTY termios */
76 static char *lock_file;
78 static int sockfd; /* socket for doing interface ioctls */
79 static int pppdev; /* +++ */
81 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
85 static int if_is_up; /* the interface is currently up */
86 static u_int32_t default_route_gateway; /* gateway addr for default route */
87 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
89 /* Prototypes for procedures local to this file. */
90 static int translate_speed __P((int));
91 static int baud_rate_of __P((int));
92 static int dodefaultroute __P((u_int32_t, int));
93 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
94 static int ether_by_host __P((char *, struct ether_addr *));
98 * sys_init - System-dependent initialization.
103 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
104 setlogmask(LOG_UPTO(LOG_INFO));
106 /* Get an internet socket for doing socket ioctl's on. */
107 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
108 fatal("Couldn't create IP socket: %m");
110 if((pppdev = open("/dev/ppp0", O_RDWR, O_NONBLOCK)) == NULL)
111 fatal("Couldn't open /dev/ppp0: %m");
118 * sys_cleanup - restore any system state we modified before exiting:
119 * mark the interface down, delete default route and/or proxy arp entry.
120 * This should call die() because it's called from die().
128 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
129 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
130 && ((ifr.ifr_flags & IFF_UP) != 0)) {
131 ifr.ifr_flags &= ~IFF_UP;
132 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
136 if (default_route_gateway)
137 cifdefaultroute(0, 0, default_route_gateway);
139 cifproxyarp(0, proxy_arp_addr);
145 * ppp_available - check whether the system has any ppp interfaces
146 * (in fact we check whether we can do an ioctl on ppp0).
153 extern char *no_ppp_msg;
155 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
156 return 1; /* can't tell - maybe we're not root */
158 strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
159 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
163 This system lacks kernel support for PPP. To include PPP support\n\
164 in the kernel, please follow the steps detailed in the README.NeXT\n\
165 file in the ppp-2.2 distribution.\n";
171 * establish_ppp - Turn the serial port into a ppp interface.
177 int pppdisc = PPPDISC;
180 if (ioctl(fd, TIOCGETD, &initdisc) < 0)
181 fatal("ioctl(TIOCGETD): %m");
182 if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
183 fatal("ioctl(establish TIOCSETD): %m");
186 * Find out which interface we were given.
188 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
189 fatal("ioctl(PPPIOCGUNIT): %m");
192 * Enable debug in the driver if requested.
195 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
196 warn("ioctl(PPPIOCGFLAGS): %m");
198 x |= (kdebugflag & 0xFF) * SC_DEBUG;
199 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
200 warn("ioctl(PPPIOCSFLAGS): %m");
205 * Set device for non-blocking reads so PPPD can poll for
206 * input from the kernel.
208 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
209 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
210 warn("Couldn't set device to non-blocking mode: %m");
218 * disestablish_ppp - Restore the serial port to normal operation.
219 * This shouldn't call die() because it's called from die().
225 /* Reset non-blocking mode on fd. */
226 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
227 warn("Couldn't restore device fd flags: %m");
230 /* Restore old line discipline. */
231 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
232 error("ioctl(TIOCSETD): %m");
237 * Check whether the link seems not to be 8-bit clean.
245 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
247 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
249 s = "bit 7 set to 1";
252 s = "bit 7 set to 0";
262 warn("Serial link is not 8-bit clean:");
263 warn("All received characters had %s", s);
269 * List of valid speeds.
272 int speed_int, speed_val;
348 #warning Defining B115200
359 * Translate from bits/second to a speed_t.
365 struct speed *speedp;
369 for (speedp = speeds; speedp->speed_int; speedp++)
370 if (bps == speedp->speed_int)
371 return speedp->speed_val;
372 warn("speed %d not supported", bps);
377 * Translate from a speed_t to bits/second.
383 struct speed *speedp;
387 for (speedp = speeds; speedp->speed_int; speedp++)
388 if (speed == speedp->speed_val)
389 return speedp->speed_int;
395 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
396 * at the requested speed, etc. If `local' is true, set CLOCAL
397 * regardless of whether the modem option was specified.
400 set_up_tty(fd, local)
403 int speed, x, modembits;
406 if (tcgetattr(fd, &tios) < 0)
407 fatal("tcgetattr: %m");
412 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
414 tios.c_cflag |= CS8 | CREAD | HUPCL;
416 tios.c_cflag |= CLOCAL;
418 tios.c_iflag = IGNBRK | IGNPAR;
422 tios.c_cc[VTIME] = 0;
425 tios.c_iflag |= IXON | IXOFF;
426 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
427 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
430 speed = translate_speed(inspeed);
432 cfsetospeed(&tios, speed);
433 cfsetispeed(&tios, speed);
435 speed = cfgetospeed(&tios);
437 * We can't proceed if the serial port speed is B0,
438 * since that implies that the serial port is disabled.
441 fatal("Baud rate for %s is 0; need explicit baud rate",
446 modembits = TIOCM_RTS | TIOCM_CTS;
447 if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
448 error("ioctl: TIOCMBIS/BIC: %m");
451 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
452 fatal("tcsetattr: %m");
454 baud_rate = inspeed = baud_rate_of(speed);
459 * restore_tty - restore the terminal to the saved settings.
466 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
468 warn("tcsetattr: %m");
474 * setdtr - control the DTR line on the serial port.
475 * This is called from die(), so it shouldn't call die().
477 * The write hack is to get NXFax to recognize that there is
478 * activity on the port. Not using the write nukes
479 * NXFax's capability to determine port usage.
486 int modembits = TIOCM_DTR;
494 /* ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
495 ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
500 * output - Output PPP packet.
509 dbglog("sent %P", p, len);
511 if (write(ttyfd, p, len) < 0) {
512 if (errno == EWOULDBLOCK || errno == ENOBUFS
513 || errno == ENXIO || errno == EIO) {
514 warn("write: warning: %m");
523 * wait_input - wait until there is data available,
524 * for the length of time specified by *timo (indefinite
529 struct timeval *timo;
535 n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
536 if (n < 0 && errno != EINTR)
542 * add_fd - add an fd to the set that wait_input waits for.
553 * remove_fd - remove an fd from the set that wait_input waits for.
562 * read_packet - get a PPP packet from the serial device.
570 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
571 if (errno == EWOULDBLOCK || errno == EINTR) {
572 SYSDEBUG(("read: %m"));
582 * ppp_send_config - configure the transmit characteristics of
586 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
594 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
596 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
597 fatal("ioctl(SIOCSIFMTU): %m");
599 if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
600 fatal("ioctl(PPPIOCSASYNCMAP): %m");
602 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
603 fatal("ioctl(PPPIOCGFLAGS): %m");
605 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
606 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
607 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
608 fatal("ioctl(PPPIOCSFLAGS): %m");
613 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
616 ppp_set_xaccm(unit, accm)
620 if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
621 warn("ioctl(PPPIOCSXASYNCMAP): %m");
626 * ppp_recv_config - configure the receive-side characteristics of
630 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
637 if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
638 fatal("ioctl(PPPIOCSMRU): %m");
639 if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
640 fatal("ioctl(PPPIOCSRASYNCMAP): %m");
641 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
642 fatal("ioctl(PPPIOCGFLAGS): %m");
643 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
644 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
645 fatal("ioctl(PPPIOCSFLAGS): %m");
649 * ccp_test - ask kernel whether a given compression method
650 * is acceptable for use.
653 ccp_test(unit, opt_ptr, opt_len, for_transmit)
654 int unit, opt_len, for_transmit;
657 struct ppp_option_data data;
660 data.length = opt_len;
661 data.transmit = for_transmit;
662 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
664 return (errno == ENOBUFS)? 0: -1;
668 * ccp_flags_set - inform kernel about the current state of CCP.
671 ccp_flags_set(unit, isopen, isup)
672 int unit, isopen, isup;
676 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
677 error("ioctl(PPPIOCGFLAGS): %m");
680 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
681 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
682 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
683 error("ioctl(PPPIOCSFLAGS): %m");
687 * ccp_fatal_error - returns 1 if decompression was disabled as a
688 * result of an error detected after decompression of a packet,
689 * 0 otherwise. This is necessary because of patent nonsense.
692 ccp_fatal_error(unit)
697 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
698 error("ioctl(PPPIOCGFLAGS): %m");
701 return x & SC_DC_FERROR;
705 * sifvjcomp - config tcp header compression
708 sifvjcomp(u, vjcomp, cidcomp, maxcid)
709 int u, vjcomp, cidcomp, maxcid;
713 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
714 error("ioctl(PPIOCGFLAGS): %m");
717 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
718 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
719 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
720 error("ioctl(PPPIOCSFLAGS): %m");
723 if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
724 error("ioctl(PPPIOCSFLAGS): %m");
731 * sifup - Config the interface up and enable IP packets to pass.
734 #define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */
745 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
746 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
747 error("ioctl (SIOCGIFFLAGS): %m");
750 ifr.ifr_flags |= IFF_UP;
751 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
752 error("ioctl(SIOCSIFFLAGS): %m");
756 npi.protocol = PPP_IP;
757 npi.mode = NPMODE_PASS;
758 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
759 if (errno != ENOTTY) {
760 error("ioctl(PPPIOCSNPMODE): %m");
763 /* for backwards compatibility */
764 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
765 error("ioctl (PPPIOCGFLAGS): %m");
769 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
770 error("ioctl(PPPIOCSFLAGS): %m");
778 * sifdown - Config the interface down and disable IP.
790 npi.protocol = PPP_IP;
791 npi.mode = NPMODE_ERROR;
792 ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
793 /* ignore errors, because ttyfd might have been closed by now. */
796 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
797 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
798 error("ioctl (SIOCGIFFLAGS): %m");
801 ifr.ifr_flags &= ~IFF_UP;
802 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
803 error("ioctl(SIOCSIFFLAGS): %m");
812 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
815 #define SET_SA_FAMILY(addr, family) \
816 BZERO((char *) &(addr), sizeof(addr)); \
817 addr.sa_family = (family);
820 * sifaddr - Config the interface IP addresses and netmask.
831 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
832 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
833 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
834 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
835 error("ioctl(SIOCAIFADDR): %m");
838 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
839 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
840 error("ioctl(SIOCSIFDSTADDR): %m");
844 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
845 info("Setting interface mask to %s\n", ip_ntoa(m));
846 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
847 error("ioctl(SIOCSIFNETMASK): %m");
855 * cifaddr - Clear the interface IP addresses, and delete routes
856 * through the interface if possible.
858 * N.B.: under NextStep, you can't *delete* an address on an interface,
859 * so we change it to 0.0.0.0... A real hack. But it simplifies
860 * reconnection on the server side.
871 (void) sifaddr(u, o, h, 0L);
873 SET_SA_FAMILY(rt.rt_dst, AF_INET);
874 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
875 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
876 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
877 rt.rt_flags = RTF_HOST;
878 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
879 error("ioctl(SIOCDELRT): %m");
886 * sifdefaultroute - assign a default route through the address given.
889 sifdefaultroute(u, l, g)
893 return dodefaultroute(g, 's');
897 * cifdefaultroute - delete a default route through the address given.
900 cifdefaultroute(u, l, g)
904 return dodefaultroute(g, 'c');
908 * dodefaultroute - talk to a routing socket to add/delete a default route.
911 dodefaultroute(g, cmd)
917 SET_SA_FAMILY(rt.rt_dst, AF_INET);
918 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
919 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
920 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
921 rt.rt_flags = RTF_GATEWAY;
922 if (ioctl(sockfd, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
923 error("%cifdefaultroute: ioctl(%s): %m", cmd,
924 (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
927 default_route_gateway = (cmd == 's')? g: 0;
932 * sifproxyarp - Make a proxy ARP entry for the peer.
935 sifproxyarp(unit, hisaddr)
939 struct arpreq arpreq;
941 BZERO(&arpreq, sizeof(arpreq));
944 * Get the hardware address of an interface on the same subnet
945 * as our local address.
947 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
948 error("Cannot determine ethernet address for proxy ARP");
952 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
953 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
954 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
955 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
956 error("ioctl(SIOCSARP): %m");
960 proxy_arp_addr = hisaddr;
965 * cifproxyarp - Delete the proxy ARP entry for the peer.
968 cifproxyarp(unit, hisaddr)
972 struct arpreq arpreq;
974 BZERO(&arpreq, sizeof(arpreq));
975 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
976 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
977 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
978 warn("ioctl(SIOCDARP): %m");
986 * get_ether_addr - get the hardware address of an interface on the
987 * the same subnet as ipaddr.
992 get_ether_addr(ipaddr, hwaddr)
994 struct sockaddr *hwaddr;
996 struct ifreq *ifr, *ifend, *ifp;
998 struct ether_addr dla;
1001 struct ifreq ifs[MAX_IFS];
1002 struct hostent *hostent;
1004 ifc.ifc_len = sizeof(ifs);
1006 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1007 error("ioctl(SIOCGIFCONF): %m");
1012 * Scan through looking for an interface with an Internet
1013 * address on the same subnet as `ipaddr'.
1015 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1016 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1017 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1018 if (ifr->ifr_addr.sa_family == AF_INET) {
1019 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1020 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1022 * Check that the interface is up, and not point-to-point
1025 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1027 if ((ifreq.ifr_flags &
1028 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1029 != (IFF_UP|IFF_BROADCAST))
1032 * Get its netmask and check that it's on the right subnet.
1034 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1036 mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
1037 if ((ipaddr & mask) != (ina & mask))
1046 info("found interface %s for proxy arp", ifr->ifr_name);
1049 * Get the hostname and look for an entry using the ethers database.
1050 * Under NeXTStep this is the best we can do for now.
1052 if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
1055 if (ether_by_host(hostent->h_name, &dla)) {
1056 info("Add entry for %s in /etc/ethers", hostent->h_name);
1057 return 0; /* it's not there */
1059 hwaddr->sa_family = AF_UNSPEC;
1060 BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
1065 ether_by_host(hostname, etherptr)
1067 struct ether_addr *etherptr;
1069 struct ether_addr *thisptr;
1075 if (!ether_hostton(hostname, etherptr))
1078 * We shall now try and
1079 * find the address in the
1080 * top domain of netinfo.
1082 slprintf(path, sizeof(path), "/machines/%s", hostname);
1084 if (ni_open((void *)0, "/", &conn)
1085 || ni_root(conn, &root)
1086 || ni_pathsearch(conn, &root, path)
1087 || ni_lookupprop(conn, &root, "en_address", &val))
1091 * Now we can convert the returned string into an ethernet address.
1093 strlcpy(path, val.ni_namelist_val[0], sizeof(path));
1095 if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
1097 BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
1104 * Return user specified netmask, modified by any mask we might determine
1105 * for address `addr' (in network byte order).
1106 * Here we scan through the system's list of interfaces, looking for
1107 * any non-point-to-point interfaces which might appear to be on the same
1108 * network as `addr'. If we find any, we OR in their netmask to the
1109 * user-specified netmask.
1115 u_int32_t mask, nmask, ina;
1116 struct ifreq *ifr, *ifend, ifreq;
1118 struct ifreq ifs[MAX_IFS];
1121 if (IN_CLASSA(addr)) /* determine network mask for address class */
1122 nmask = IN_CLASSA_NET;
1123 else if (IN_CLASSB(addr))
1124 nmask = IN_CLASSB_NET;
1126 nmask = IN_CLASSC_NET;
1127 /* class D nets are disallowed by bad_ip_adrs */
1128 mask = netmask | htonl(nmask);
1131 * Scan through the system's network interfaces.
1133 ifc.ifc_len = sizeof(ifs);
1135 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1136 warn("ioctl(SIOCGIFCONF): %m");
1139 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1140 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1141 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1143 * Check the interface's internet address.
1145 if (ifr->ifr_addr.sa_family != AF_INET)
1147 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1148 if ((ntohl(ina) & nmask) != (addr & nmask))
1151 * Check that the interface is up, and not point-to-point or loopback.
1153 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1154 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1156 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1160 * Get its netmask and OR it into our mask.
1162 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1164 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1171 * have_route_to - determine if the system has any route to
1172 * a given IP address.
1173 * For demand mode to work properly, we have to ignore routes
1174 * through our own interface.
1176 int have_route_to(u_int32_t addr)
1183 * daemon - Detach us from the terminal session.
1186 daemon(nochdir, noclose)
1187 int nochdir, noclose;
1191 if ((pid = fork()) < 0)
1194 exit(0); /* parent dies */
1199 fclose(stdin); /* don't need stdin, stdout, stderr */
1211 char *d = malloc(strlen(s) + 1);
1213 if (d) strcpy(d, s);
1218 * This logwtmp() implementation is subject to the following copyright:
1220 * Copyright (c) 1988 The Regents of the University of California.
1221 * All rights reserved.
1223 * Redistribution and use in source and binary forms are permitted
1224 * provided that the above copyright notice and this paragraph are
1225 * duplicated in all such forms and that any documentation,
1226 * advertising materials, and other materials related to such
1227 * distribution and use acknowledge that the software was developed
1228 * by the University of California, Berkeley. The name of the
1229 * University may not be used to endorse or promote products derived
1230 * from this software without specific prior written permission.
1231 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1232 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1233 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1236 #define WTMPFILE "/usr/adm/wtmp"
1239 logwtmp(line, name, host)
1240 const char *line, *name, *host;
1246 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1248 if (!fstat(fd, &buf)) {
1249 strlcpy(ut.ut_line, line, sizeof(ut.ut_line));
1250 strlcpy(ut.ut_name, name, sizeof(ut.ut_name));
1251 strlcpy(ut.ut_host, host, sizeof(ut.ut_host));
1252 (void)time(&ut.ut_time);
1253 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1254 (void)ftruncate(fd, buf.st_size);
1260 * Routines for locking and unlocking the serial device, moved here
1264 #define LOCK_PREFIX "/usr/spool/uucp/LCK/LCK.."
1267 * lock - create a lock file for the named device
1277 if ((p = strrchr(dev, '/')) != NULL)
1279 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1280 lock_file = malloc(l);
1281 if (lock_file == NULL)
1282 novm("lock file name");
1283 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1285 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1287 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1288 /* Read the lock file to find out who has the device locked */
1289 n = read(fd, &pid, sizeof(pid));
1291 error("Can't read pid from lock file %s", lock_file);
1294 if (kill(pid, 0) == -1 && errno == ESRCH) {
1295 /* pid no longer exists - remove the lock file */
1296 if (unlink(lock_file) == 0) {
1298 notice("Removed stale lock on %s (pid %d)",
1302 warn("Couldn't remove stale lock on %s", dev);
1304 notice("Device %s is locked by pid %d",
1309 error("Can't create lock file %s: %m", lock_file);
1316 write(fd, &pid, sizeof pid);
1323 * unlock - remove our lockfile
1335 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1346 u_char let, code, size;
1348 size = (cmd >> 16) & IOCPARM_MASK;
1352 if (let == 't' && (75 <= code && code <= 90))
1353 info("ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1354 let, code, size, c);
1357 ret = ioctl(fd, cmd, c);
1362 info("ioctl('%c', %d, %d) errno = %d (%m)\n",
1363 let, code, size, errno);
1364 if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1365 int i, len = ((cmd >> 16) & IOCPARM_MASK);
1366 for (i = 0; i < len / 4; ++i)
1367 info("word[%d] @ 0x%06x = 0x%x\n",
1368 i, &((int *) c)[i],((int *)c)[i]);
1373 if (ret == -1 && errno == EPERM)
1377 #endif /* HAS_BROKEN_IOCTL */
1380 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1383 * These redefinitions of Posix functions are necessary
1384 * because HPPA systems have an OS bug that causes
1385 * sigaction to core dump:
1387 * AlainF 9-Nov-1994 HACK FOR HP-PA/NEXTSTEP
1388 * sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1389 * Posix lib. This causes pppd to SIGBUS at the expiration
1390 * of the first timeout (_sigtramp seems to invoke
1391 * the SIGALRM handler at an unreasonably low address).
1392 * All calls so sigaction(3) have been changed to calls
1393 * to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1395 * This is kind of a hack, especially since there are
1396 * other routines of the Posix lib still used, but
1399 * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1400 * have the same bug. Thus this fix has been enabled for SPARC also.
1405 int sigemptyset(sigset_t *mask)
1410 sigaddset(sigset_t *mask, int which_sig)
1412 *mask |= sigmask(which_sig);
1416 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1421 sv.sv_handler = act->sa_handler;
1422 sv.sv_mask = act->sa_mask;
1428 warn("PPPD: Inside modified HP and SPARC sigaction\n");
1431 return sigvec(sig, &sv, NULL);
1438 * Code following is added for 2.3 compatibility
1442 * get_idle_time - return how long the link has been idle.
1445 get_idle_time(u, ip)
1447 struct ppp_idle *ip;
1449 return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1453 * get_ppp_stats - return statistics for the link.
1456 get_ppp_stats(u, stats)
1458 struct pppd_stats *stats;
1460 struct ifpppstatsreq req;
1462 memset (&req, 0, sizeof (req));
1463 strlcpy(req.ifr_name, interface, sizeof(req.ifr_name));
1464 if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) {
1465 error("Couldn't get PPP statistics: %m");
1468 stats->bytes_in = req.stats.p.ppp_ibytes;
1469 stats->bytes_out = req.stats.p.ppp_obytes;
1475 * get_loop_output - read characters from the loopback, form them
1476 * into frames, and detect when we want to bring the real link up.
1477 * Return value is 1 if we need to bring up the link, 0 otherwise.
1487 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1488 if (loop_chars(inbuf, n))
1493 fatal("eof on loopback");
1494 if (errno != EWOULDBLOCK)
1495 fatal("read from loopback: %m");
1504 * sifnpmode - Set the mode for handling packets for a given NP.
1507 sifnpmode(u, proto, mode)
1514 npi.protocol = proto;
1516 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1517 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1525 * open_ppp_loopback - open the device we use for getting
1526 * packets in demand mode, and connect it to a ppp interface.
1527 * Here we use a pty.
1535 struct termios tios;
1536 int pppdisc = PPPDISC;
1538 fatal("open_ppp_loopback called!");
1540 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
1541 fatal("No free pty for loopback");
1542 SYSDEBUG(("using %s for loopback", loop_name));
1544 if (tcgetattr(loop_slave, &tios) == 0) {
1545 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1546 tios.c_cflag |= CS8 | CREAD;
1547 tios.c_iflag = IGNPAR;
1550 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1551 warn("couldn't set attributes on loopback: %m");
1554 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1555 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1556 warn("couldn't set loopback to nonblock: %m");
1559 if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0)
1560 fatal("ioctl(TIOCSETD): %m");
1563 * Find out which interface we were given.
1565 if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0)
1566 fatal("ioctl(PPPIOCGUNIT): %m");
1569 * Enable debug in the driver if requested.
1572 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1573 warn("ioctl (PPPIOCGFLAGS): %m");
1575 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1576 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1577 warn("ioctl(PPPIOCSFLAGS): %m");
1587 * restore_loop - reattach the ppp unit to the loopback.
1595 * Transfer the ppp interface back to the loopback.
1597 if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0)
1598 fatal("ioctl(transfer ppp unit): %m");
1600 if (ioctl(loop_slave, TIOCSETD, &x) < 0)
1601 fatal("ioctl(TIOCSETD): %m");
1604 * Check that we got the same unit again.
1606 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
1607 fatal("ioctl(PPPIOCGUNIT): %m");
1609 fatal("transfer_ppp failed: wanted unit %d, got %d",
1616 * Use the hostid as part of the random number seed.
1626 * sys_check_options - check the options that the user specified
1632 * We don't support demand dialing yet.
1636 option_error("PPP-2.3 for NeXTSTEP does not yet support demand dialing");
1644 * sys_close - Clean up in a child process before execing.
1650 if (loop_slave >= 0) {
1659 * wait_loop_output - wait until there is data available on the
1660 * loopback, for the length of time specified by *timo (indefinite
1663 void wait_loop_output(timo)
1664 struct timeval *timo;
1670 FD_SET(loop_master, &ready);
1671 n = select(loop_master + 1, &ready, NULL, &ready, timo);
1672 if (n < 0 && errno != EINTR)
1673 fatal("select: %m");
1677 * wait_time - wait for a given length of time or until a
1678 * signal is received.
1680 void wait_time(timo)
1681 struct timeval *timo;
1685 n = select(0, NULL, NULL, NULL, timo);
1686 if (n < 0 && errno != EINTR)
1687 fatal("select: %m");