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 1.14 1999/03/16 22:53:46 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, sizeof(ifr.ifr_name), ifname);
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 * note_debug_level - note a change in the debug level.
151 info("Debug turned ON, Level %d", debug);
152 setlogmask(LOG_UPTO(LOG_DEBUG));
154 setlogmask(LOG_UPTO(LOG_WARNING));
159 * ppp_available - check whether the system has any ppp interfaces
160 * (in fact we check whether we can do an ioctl on ppp0).
167 extern char *no_ppp_msg;
169 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
170 return 1; /* can't tell - maybe we're not root */
172 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), "ppp0");
173 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
177 This system lacks kernel support for PPP. To include PPP support\n\
178 in the kernel, please follow the steps detailed in the README.NeXT\n\
179 file in the ppp-2.2 distribution.\n";
185 * establish_ppp - Turn the serial port into a ppp interface.
191 int pppdisc = PPPDISC;
194 if (ioctl(fd, TIOCGETD, &initdisc) < 0)
195 fatal("ioctl(TIOCGETD): %m");
196 if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
197 fatal("ioctl(establish TIOCSETD): %m");
200 * Find out which interface we were given.
202 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
203 fatal("ioctl(PPPIOCGUNIT): %m");
206 * Enable debug in the driver if requested.
209 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
210 warn("ioctl(PPPIOCGFLAGS): %m");
212 x |= (kdebugflag & 0xFF) * SC_DEBUG;
213 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
214 warn("ioctl(PPPIOCSFLAGS): %m");
219 * Set device for non-blocking reads so PPPD can poll for
220 * input from the kernel.
222 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
223 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
224 warn("Couldn't set device to non-blocking mode: %m");
232 * disestablish_ppp - Restore the serial port to normal operation.
233 * This shouldn't call die() because it's called from die().
239 /* Reset non-blocking mode on fd. */
240 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
241 warn("Couldn't restore device fd flags: %m");
244 /* Restore old line discipline. */
245 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
246 error("ioctl(TIOCSETD): %m");
251 * Check whether the link seems not to be 8-bit clean.
259 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
261 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
263 s = "bit 7 set to 1";
266 s = "bit 7 set to 0";
276 warn("Serial link is not 8-bit clean:");
277 warn("All received characters had %s", s);
283 * List of valid speeds.
286 int speed_int, speed_val;
362 #warning Defining B115200
373 * Translate from bits/second to a speed_t.
379 struct speed *speedp;
383 for (speedp = speeds; speedp->speed_int; speedp++)
384 if (bps == speedp->speed_int)
385 return speedp->speed_val;
386 warn("speed %d not supported", bps);
391 * Translate from a speed_t to bits/second.
397 struct speed *speedp;
401 for (speedp = speeds; speedp->speed_int; speedp++)
402 if (speed == speedp->speed_val)
403 return speedp->speed_int;
409 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
410 * at the requested speed, etc. If `local' is true, set CLOCAL
411 * regardless of whether the modem option was specified.
414 set_up_tty(fd, local)
417 int speed, x, modembits;
420 if (tcgetattr(fd, &tios) < 0)
421 fatal("tcgetattr: %m");
426 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
428 tios.c_cflag |= CS8 | CREAD | HUPCL;
430 tios.c_cflag |= CLOCAL;
432 tios.c_iflag = IGNBRK | IGNPAR;
436 tios.c_cc[VTIME] = 0;
439 tios.c_iflag |= IXON | IXOFF;
440 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
441 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
444 speed = translate_speed(inspeed);
446 cfsetospeed(&tios, speed);
447 cfsetispeed(&tios, speed);
449 speed = cfgetospeed(&tios);
451 * We can't proceed if the serial port speed is B0,
452 * since that implies that the serial port is disabled.
455 fatal("Baud rate for %s is 0; need explicit baud rate",
460 modembits = TIOCM_RTS | TIOCM_CTS;
461 if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
462 error("ioctl: TIOCMBIS/BIC: %m");
465 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
466 fatal("tcsetattr: %m");
468 baud_rate = inspeed = baud_rate_of(speed);
473 * restore_tty - restore the terminal to the saved settings.
480 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
482 warn("tcsetattr: %m");
488 * setdtr - control the DTR line on the serial port.
489 * This is called from die(), so it shouldn't call die().
491 * The write hack is to get NXFax to recognize that there is
492 * activity on the port. Not using the write nukes
493 * NXFax's capability to determine port usage.
500 int modembits = TIOCM_DTR;
508 /* ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
509 ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
514 * output - Output PPP packet.
523 dbglog("sent %P", p, len);
525 if (write(ttyfd, p, len) < 0) {
526 if (errno == EWOULDBLOCK || errno == ENOBUFS
527 || errno == ENXIO || errno == EIO) {
528 warn("write: warning: %m");
537 * wait_input - wait until there is data available,
538 * for the length of time specified by *timo (indefinite
543 struct timeval *timo;
549 n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
550 if (n < 0 && errno != EINTR)
556 * add_fd - add an fd to the set that wait_input waits for.
566 * remove_fd - remove an fd from the set that wait_input waits for.
568 void remove_fd(int fd)
574 * read_packet - get a PPP packet from the serial device.
582 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
583 if (errno == EWOULDBLOCK || errno == EINTR) {
584 SYSDEBUG(("read: %m"));
594 * ppp_send_config - configure the transmit characteristics of
598 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
606 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
608 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
609 fatal("ioctl(SIOCSIFMTU): %m");
611 if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
612 fatal("ioctl(PPPIOCSASYNCMAP): %m");
614 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
615 fatal("ioctl(PPPIOCGFLAGS): %m");
617 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
618 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
619 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
620 fatal("ioctl(PPPIOCSFLAGS): %m");
625 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
628 ppp_set_xaccm(unit, accm)
632 if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
633 warn("ioctl(PPPIOCSXASYNCMAP): %m");
638 * ppp_recv_config - configure the receive-side characteristics of
642 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
649 if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
650 fatal("ioctl(PPPIOCSMRU): %m");
651 if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
652 fatal("ioctl(PPPIOCSRASYNCMAP): %m");
653 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
654 fatal("ioctl(PPPIOCGFLAGS): %m");
655 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
656 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
657 fatal("ioctl(PPPIOCSFLAGS): %m");
661 * ccp_test - ask kernel whether a given compression method
662 * is acceptable for use.
665 ccp_test(unit, opt_ptr, opt_len, for_transmit)
666 int unit, opt_len, for_transmit;
669 struct ppp_option_data data;
672 data.length = opt_len;
673 data.transmit = for_transmit;
674 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
676 return (errno == ENOBUFS)? 0: -1;
680 * ccp_flags_set - inform kernel about the current state of CCP.
683 ccp_flags_set(unit, isopen, isup)
684 int unit, isopen, isup;
688 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
689 error("ioctl(PPPIOCGFLAGS): %m");
692 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
693 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
694 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
695 error("ioctl(PPPIOCSFLAGS): %m");
699 * ccp_fatal_error - returns 1 if decompression was disabled as a
700 * result of an error detected after decompression of a packet,
701 * 0 otherwise. This is necessary because of patent nonsense.
704 ccp_fatal_error(unit)
709 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
710 error("ioctl(PPPIOCGFLAGS): %m");
713 return x & SC_DC_FERROR;
717 * sifvjcomp - config tcp header compression
720 sifvjcomp(u, vjcomp, cidcomp, maxcid)
721 int u, vjcomp, cidcomp, maxcid;
725 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
726 error("ioctl(PPIOCGFLAGS): %m");
729 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
730 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
731 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
732 error("ioctl(PPPIOCSFLAGS): %m");
735 if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
736 error("ioctl(PPPIOCSFLAGS): %m");
743 * sifup - Config the interface up and enable IP packets to pass.
746 #define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */
757 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
758 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
759 error("ioctl (SIOCGIFFLAGS): %m");
762 ifr.ifr_flags |= IFF_UP;
763 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
764 error("ioctl(SIOCSIFFLAGS): %m");
768 npi.protocol = PPP_IP;
769 npi.mode = NPMODE_PASS;
770 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
771 if (errno != ENOTTY) {
772 error("ioctl(PPPIOCSNPMODE): %m");
775 /* for backwards compatibility */
776 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
777 error("ioctl (PPPIOCGFLAGS): %m");
781 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
782 error("ioctl(PPPIOCSFLAGS): %m");
790 * sifdown - Config the interface down and disable IP.
802 npi.protocol = PPP_IP;
803 npi.mode = NPMODE_ERROR;
804 ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
805 /* ignore errors, because ttyfd might have been closed by now. */
808 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
809 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
810 error("ioctl (SIOCGIFFLAGS): %m");
813 ifr.ifr_flags &= ~IFF_UP;
814 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
815 error("ioctl(SIOCSIFFLAGS): %m");
824 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
827 #define SET_SA_FAMILY(addr, family) \
828 BZERO((char *) &(addr), sizeof(addr)); \
829 addr.sa_family = (family);
832 * sifaddr - Config the interface IP addresses and netmask.
843 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
844 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
845 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
846 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
847 error("ioctl(SIOCAIFADDR): %m");
850 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
851 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
852 error("ioctl(SIOCSIFDSTADDR): %m");
856 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
857 info("Setting interface mask to %s\n", ip_ntoa(m));
858 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
859 error("ioctl(SIOCSIFNETMASK): %m");
867 * cifaddr - Clear the interface IP addresses, and delete routes
868 * through the interface if possible.
870 * N.B.: under NextStep, you can't *delete* an address on an interface,
871 * so we change it to 0.0.0.0... A real hack. But it simplifies
872 * reconnection on the server side.
883 (void) sifaddr(u, o, h, 0L);
885 SET_SA_FAMILY(rt.rt_dst, AF_INET);
886 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
887 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
888 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
889 rt.rt_flags = RTF_HOST;
890 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
891 error("ioctl(SIOCDELRT): %m");
898 * sifdefaultroute - assign a default route through the address given.
901 sifdefaultroute(u, l, g)
905 return dodefaultroute(g, 's');
909 * cifdefaultroute - delete a default route through the address given.
912 cifdefaultroute(u, l, g)
916 return dodefaultroute(g, 'c');
920 * dodefaultroute - talk to a routing socket to add/delete a default route.
923 dodefaultroute(g, cmd)
929 SET_SA_FAMILY(rt.rt_dst, AF_INET);
930 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
931 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
932 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
933 rt.rt_flags = RTF_GATEWAY;
934 if (ioctl(sockfd, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
935 error("%cifdefaultroute: ioctl(%s): %m", cmd,
936 (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
939 default_route_gateway = (cmd == 's')? g: 0;
944 * sifproxyarp - Make a proxy ARP entry for the peer.
947 sifproxyarp(unit, hisaddr)
951 struct arpreq arpreq;
953 BZERO(&arpreq, sizeof(arpreq));
956 * Get the hardware address of an interface on the same subnet
957 * as our local address.
959 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
960 error("Cannot determine ethernet address for proxy ARP");
964 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
965 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
966 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
967 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
968 error("ioctl(SIOCSARP): %m");
972 proxy_arp_addr = hisaddr;
977 * cifproxyarp - Delete the proxy ARP entry for the peer.
980 cifproxyarp(unit, hisaddr)
984 struct arpreq arpreq;
986 BZERO(&arpreq, sizeof(arpreq));
987 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
988 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
989 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
990 warn("ioctl(SIOCDARP): %m");
998 * get_ether_addr - get the hardware address of an interface on the
999 * the same subnet as ipaddr.
1004 get_ether_addr(ipaddr, hwaddr)
1006 struct sockaddr *hwaddr;
1008 struct ifreq *ifr, *ifend, *ifp;
1009 u_int32_t ina, mask;
1010 struct ether_addr dla;
1013 struct ifreq ifs[MAX_IFS];
1014 struct hostent *hostent;
1016 ifc.ifc_len = sizeof(ifs);
1018 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1019 error("ioctl(SIOCGIFCONF): %m");
1024 * Scan through looking for an interface with an Internet
1025 * address on the same subnet as `ipaddr'.
1027 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1028 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1029 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1030 if (ifr->ifr_addr.sa_family == AF_INET) {
1031 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1032 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1034 * Check that the interface is up, and not point-to-point
1037 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1039 if ((ifreq.ifr_flags &
1040 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1041 != (IFF_UP|IFF_BROADCAST))
1044 * Get its netmask and check that it's on the right subnet.
1046 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1048 mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
1049 if ((ipaddr & mask) != (ina & mask))
1058 info("found interface %s for proxy arp", ifr->ifr_name);
1061 * Get the hostname and look for an entry using the ethers database.
1062 * Under NeXTStep this is the best we can do for now.
1064 if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
1067 if (ether_by_host(hostent->h_name, &dla)) {
1068 info("Add entry for %s in /etc/ethers", hostent->h_name);
1069 return 0; /* it's not there */
1071 hwaddr->sa_family = AF_UNSPEC;
1072 BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
1077 ether_by_host(hostname, etherptr)
1079 struct ether_addr *etherptr;
1081 struct ether_addr *thisptr;
1087 if (!ether_hostton(hostname, etherptr))
1090 * We shall now try and
1091 * find the address in the
1092 * top domain of netinfo.
1094 slprintf(path, sizeof(path), "/machines/%s", hostname);
1096 if (ni_open((void *)0, "/", &conn)
1097 || ni_root(conn, &root)
1098 || ni_pathsearch(conn, &root, path)
1099 || ni_lookupprop(conn, &root, "en_address", &val))
1103 * Now we can convert the returned string into an ethernet address.
1105 strlcpy(path, sizeof(path), val.ni_namelist_val[0]);
1107 if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
1109 BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
1116 * Return user specified netmask, modified by any mask we might determine
1117 * for address `addr' (in network byte order).
1118 * Here we scan through the system's list of interfaces, looking for
1119 * any non-point-to-point interfaces which might appear to be on the same
1120 * network as `addr'. If we find any, we OR in their netmask to the
1121 * user-specified netmask.
1127 u_int32_t mask, nmask, ina;
1128 struct ifreq *ifr, *ifend, ifreq;
1130 struct ifreq ifs[MAX_IFS];
1133 if (IN_CLASSA(addr)) /* determine network mask for address class */
1134 nmask = IN_CLASSA_NET;
1135 else if (IN_CLASSB(addr))
1136 nmask = IN_CLASSB_NET;
1138 nmask = IN_CLASSC_NET;
1139 /* class D nets are disallowed by bad_ip_adrs */
1140 mask = netmask | htonl(nmask);
1143 * Scan through the system's network interfaces.
1145 ifc.ifc_len = sizeof(ifs);
1147 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1148 warn("ioctl(SIOCGIFCONF): %m");
1151 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1152 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1153 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1155 * Check the interface's internet address.
1157 if (ifr->ifr_addr.sa_family != AF_INET)
1159 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1160 if ((ntohl(ina) & nmask) != (addr & nmask))
1163 * Check that the interface is up, and not point-to-point or loopback.
1165 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1166 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1168 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1172 * Get its netmask and OR it into our mask.
1174 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1176 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1183 * have_route_to - determine if the system has any route to
1184 * a given IP address.
1185 * For demand mode to work properly, we have to ignore routes
1186 * through our own interface.
1188 int have_route_to(u_int32_t addr)
1195 * daemon - Detach us from the terminal session.
1198 daemon(nochdir, noclose)
1199 int nochdir, noclose;
1203 if ((pid = fork()) < 0)
1206 exit(0); /* parent dies */
1211 fclose(stdin); /* don't need stdin, stdout, stderr */
1223 char *d = malloc(strlen(s) + 1);
1225 if (d) strcpy(d, s);
1230 * This logwtmp() implementation is subject to the following copyright:
1232 * Copyright (c) 1988 The Regents of the University of California.
1233 * All rights reserved.
1235 * Redistribution and use in source and binary forms are permitted
1236 * provided that the above copyright notice and this paragraph are
1237 * duplicated in all such forms and that any documentation,
1238 * advertising materials, and other materials related to such
1239 * distribution and use acknowledge that the software was developed
1240 * by the University of California, Berkeley. The name of the
1241 * University may not be used to endorse or promote products derived
1242 * from this software without specific prior written permission.
1243 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1244 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1245 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1248 #define WTMPFILE "/usr/adm/wtmp"
1251 logwtmp(line, name, host)
1252 const char *line, *name, *host;
1258 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1260 if (!fstat(fd, &buf)) {
1261 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1262 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1263 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1264 (void)time(&ut.ut_time);
1265 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1266 (void)ftruncate(fd, buf.st_size);
1272 * Routines for locking and unlocking the serial device, moved here
1276 #define LOCK_PREFIX "/usr/spool/uucp/LCK/LCK.."
1279 * lock - create a lock file for the named device
1289 if ((p = strrchr(dev, '/')) != NULL)
1291 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1292 lock_file = malloc(l);
1293 if (lock_file == NULL)
1294 novm("lock file name");
1295 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1297 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1299 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1300 /* Read the lock file to find out who has the device locked */
1301 n = read(fd, &pid, sizeof(pid));
1303 error("Can't read pid from lock file %s", lock_file);
1306 if (kill(pid, 0) == -1 && errno == ESRCH) {
1307 /* pid no longer exists - remove the lock file */
1308 if (unlink(lock_file) == 0) {
1310 notice("Removed stale lock on %s (pid %d)",
1314 warn("Couldn't remove stale lock on %s", dev);
1316 notice("Device %s is locked by pid %d",
1321 error("Can't create lock file %s: %m", lock_file);
1328 write(fd, &pid, sizeof pid);
1335 * unlock - remove our lockfile
1347 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1358 u_char let, code, size;
1360 size = (cmd >> 16) & IOCPARM_MASK;
1364 if (let == 't' && (75 <= code && code <= 90))
1365 info("ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1366 let, code, size, c);
1369 ret = ioctl(fd, cmd, c);
1374 info("ioctl('%c', %d, %d) errno = %d (%m)\n",
1375 let, code, size, errno);
1376 if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1377 int i, len = ((cmd >> 16) & IOCPARM_MASK);
1378 for (i = 0; i < len / 4; ++i)
1379 info("word[%d] @ 0x%06x = 0x%x\n",
1380 i, &((int *) c)[i],((int *)c)[i]);
1385 if (ret == -1 && errno == EPERM)
1389 #endif /* HAS_BROKEN_IOCTL */
1392 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1395 * These redefinitions of Posix functions are necessary
1396 * because HPPA systems have an OS bug that causes
1397 * sigaction to core dump:
1399 * AlainF 9-Nov-1994 HACK FOR HP-PA/NEXTSTEP
1400 * sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1401 * Posix lib. This causes pppd to SIGBUS at the expiration
1402 * of the first timeout (_sigtramp seems to invoke
1403 * the SIGALRM handler at an unreasonably low address).
1404 * All calls so sigaction(3) have been changed to calls
1405 * to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1407 * This is kind of a hack, especially since there are
1408 * other routines of the Posix lib still used, but
1411 * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1412 * have the same bug. Thus this fix has been enabled for SPARC also.
1417 int sigemptyset(sigset_t *mask)
1422 sigaddset(sigset_t *mask, int which_sig)
1424 *mask |= sigmask(which_sig);
1428 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1433 sv.sv_handler = act->sa_handler;
1434 sv.sv_mask = act->sa_mask;
1440 warn("PPPD: Inside modified HP and SPARC sigaction\n");
1443 return sigvec(sig, &sv, NULL);
1450 * Code following is added for 2.3 compatibility
1454 * get_idle_time - return how long the link has been idle.
1457 get_idle_time(u, ip)
1459 struct ppp_idle *ip;
1461 return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1466 * get_loop_output - read characters from the loopback, form them
1467 * into frames, and detect when we want to bring the real link up.
1468 * Return value is 1 if we need to bring up the link, 0 otherwise.
1478 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1479 if (loop_chars(inbuf, n))
1484 fatal("eof on loopback");
1485 if (errno != EWOULDBLOCK)
1486 fatal("read from loopback: %m");
1495 * sifnpmode - Set the mode for handling packets for a given NP.
1498 sifnpmode(u, proto, mode)
1505 npi.protocol = proto;
1507 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1508 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1516 * open_ppp_loopback - open the device we use for getting
1517 * packets in demand mode, and connect it to a ppp interface.
1518 * Here we use a pty.
1526 struct termios tios;
1527 int pppdisc = PPPDISC;
1529 fatal("open_ppp_loopback called!");
1531 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
1532 fatal("No free pty for loopback");
1533 SYSDEBUG(("using %s for loopback", loop_name));
1535 if (tcgetattr(loop_slave, &tios) == 0) {
1536 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1537 tios.c_cflag |= CS8 | CREAD;
1538 tios.c_iflag = IGNPAR;
1541 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1542 warn("couldn't set attributes on loopback: %m");
1545 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1546 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1547 warn("couldn't set loopback to nonblock: %m");
1550 if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0)
1551 fatal("ioctl(TIOCSETD): %m");
1554 * Find out which interface we were given.
1556 if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0)
1557 fatal("ioctl(PPPIOCGUNIT): %m");
1560 * Enable debug in the driver if requested.
1563 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1564 warn("ioctl (PPPIOCGFLAGS): %m");
1566 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1567 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1568 warn("ioctl(PPPIOCSFLAGS): %m");
1578 * restore_loop - reattach the ppp unit to the loopback.
1586 * Transfer the ppp interface back to the loopback.
1588 if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0)
1589 fatal("ioctl(transfer ppp unit): %m");
1591 if (ioctl(loop_slave, TIOCSETD, &x) < 0)
1592 fatal("ioctl(TIOCSETD): %m");
1595 * Check that we got the same unit again.
1597 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
1598 fatal("ioctl(PPPIOCGUNIT): %m");
1600 fatal("transfer_ppp failed: wanted unit %d, got %d",
1607 * Use the hostid as part of the random number seed.
1617 * sys_check_options - check the options that the user specified
1623 * We don't support demand dialing yet.
1627 option_error("PPP-2.3 for NeXTSTEP does not yet support demand dialing");
1635 * sys_close - Clean up in a child process before execing.
1641 if (loop_slave >= 0) {
1650 * wait_loop_output - wait until there is data available on the
1651 * loopback, for the length of time specified by *timo (indefinite
1654 void wait_loop_output(timo)
1655 struct timeval *timo;
1661 FD_SET(loop_master, &ready);
1662 n = select(loop_master + 1, &ready, NULL, &ready, timo);
1663 if (n < 0 && errno != EINTR)
1664 fatal("select: %m");
1668 * wait_time - wait for a given length of time or until a
1669 * signal is received.
1671 void wait_time(timo)
1672 struct timeval *timo;
1676 n = select(0, NULL, NULL, NULL, timo);
1677 if (n < 0 && errno != EINTR)
1678 fatal("select: %m");