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 1.13 1999/03/16 02:57:05 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");
231 * disestablish_ppp - Restore the serial port to normal operation.
232 * This shouldn't call die() because it's called from die().
238 /* Reset non-blocking mode on fd. */
239 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
240 warn("Couldn't restore device fd flags: %m");
243 /* Restore old line discipline. */
244 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
245 error("ioctl(TIOCSETD): %m");
250 * Check whether the link seems not to be 8-bit clean.
258 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
260 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
262 s = "bit 7 set to 1";
265 s = "bit 7 set to 0";
275 warn("Serial link is not 8-bit clean:");
276 warn("All received characters had %s", s);
282 * List of valid speeds.
285 int speed_int, speed_val;
361 #warning Defining B115200
372 * Translate from bits/second to a speed_t.
378 struct speed *speedp;
382 for (speedp = speeds; speedp->speed_int; speedp++)
383 if (bps == speedp->speed_int)
384 return speedp->speed_val;
385 warn("speed %d not supported", bps);
390 * Translate from a speed_t to bits/second.
396 struct speed *speedp;
400 for (speedp = speeds; speedp->speed_int; speedp++)
401 if (speed == speedp->speed_val)
402 return speedp->speed_int;
408 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
409 * at the requested speed, etc. If `local' is true, set CLOCAL
410 * regardless of whether the modem option was specified.
413 set_up_tty(fd, local)
416 int speed, x, modembits;
419 if (tcgetattr(fd, &tios) < 0)
420 fatal("tcgetattr: %m");
425 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
427 tios.c_cflag |= CS8 | CREAD | HUPCL;
429 tios.c_cflag |= CLOCAL;
431 tios.c_iflag = IGNBRK | IGNPAR;
435 tios.c_cc[VTIME] = 0;
438 tios.c_iflag |= IXON | IXOFF;
439 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
440 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
443 speed = translate_speed(inspeed);
445 cfsetospeed(&tios, speed);
446 cfsetispeed(&tios, speed);
448 speed = cfgetospeed(&tios);
450 * We can't proceed if the serial port speed is B0,
451 * since that implies that the serial port is disabled.
454 fatal("Baud rate for %s is 0; need explicit baud rate",
459 modembits = TIOCM_RTS | TIOCM_CTS;
460 if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
461 error("ioctl: TIOCMBIS/BIC: %m");
464 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
465 fatal("tcsetattr: %m");
467 baud_rate = inspeed = baud_rate_of(speed);
472 * restore_tty - restore the terminal to the saved settings.
479 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
481 warn("tcsetattr: %m");
487 * setdtr - control the DTR line on the serial port.
488 * This is called from die(), so it shouldn't call die().
490 * The write hack is to get NXFax to recognize that there is
491 * activity on the port. Not using the write nukes
492 * NXFax's capability to determine port usage.
499 int modembits = TIOCM_DTR;
507 /* ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
508 ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
513 * output - Output PPP packet.
522 dbglog("sent %P", p, len);
524 if (write(ttyfd, p, len) < 0) {
525 if (errno == EWOULDBLOCK || errno == ENOBUFS
526 || errno == ENXIO || errno == EIO) {
527 warn("write: warning: %m");
536 * wait_input - wait until there is data available,
537 * for the length of time specified by *timo (indefinite
542 struct timeval *timo;
548 n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
549 if (n < 0 && errno != EINTR)
555 * add_fd - add an fd to the set that wait_input waits for.
565 * remove_fd - remove an fd from the set that wait_input waits for.
567 void remove_fd(int fd)
573 * read_packet - get a PPP packet from the serial device.
581 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
582 if (errno == EWOULDBLOCK || errno == EINTR) {
583 SYSDEBUG(("read: %m"));
593 * ppp_send_config - configure the transmit characteristics of
597 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
605 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
607 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
608 fatal("ioctl(SIOCSIFMTU): %m");
610 if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
611 fatal("ioctl(PPPIOCSASYNCMAP): %m");
613 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
614 fatal("ioctl(PPPIOCGFLAGS): %m");
616 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
617 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
618 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
619 fatal("ioctl(PPPIOCSFLAGS): %m");
624 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
627 ppp_set_xaccm(unit, accm)
631 if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
632 warn("ioctl(PPPIOCSXASYNCMAP): %m");
637 * ppp_recv_config - configure the receive-side characteristics of
641 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
648 if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
649 fatal("ioctl(PPPIOCSMRU): %m");
650 if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
651 fatal("ioctl(PPPIOCSRASYNCMAP): %m");
652 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
653 fatal("ioctl(PPPIOCGFLAGS): %m");
654 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
655 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
656 fatal("ioctl(PPPIOCSFLAGS): %m");
660 * ccp_test - ask kernel whether a given compression method
661 * is acceptable for use.
664 ccp_test(unit, opt_ptr, opt_len, for_transmit)
665 int unit, opt_len, for_transmit;
668 struct ppp_option_data data;
671 data.length = opt_len;
672 data.transmit = for_transmit;
673 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
675 return (errno == ENOBUFS)? 0: -1;
679 * ccp_flags_set - inform kernel about the current state of CCP.
682 ccp_flags_set(unit, isopen, isup)
683 int unit, isopen, isup;
687 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
688 error("ioctl(PPPIOCGFLAGS): %m");
691 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
692 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
693 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
694 error("ioctl(PPPIOCSFLAGS): %m");
698 * ccp_fatal_error - returns 1 if decompression was disabled as a
699 * result of an error detected after decompression of a packet,
700 * 0 otherwise. This is necessary because of patent nonsense.
703 ccp_fatal_error(unit)
708 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
709 error("ioctl(PPPIOCGFLAGS): %m");
712 return x & SC_DC_FERROR;
716 * sifvjcomp - config tcp header compression
719 sifvjcomp(u, vjcomp, cidcomp, maxcid)
720 int u, vjcomp, cidcomp, maxcid;
724 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
725 error("ioctl(PPIOCGFLAGS): %m");
728 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
729 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
730 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
731 error("ioctl(PPPIOCSFLAGS): %m");
734 if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
735 error("ioctl(PPPIOCSFLAGS): %m");
742 * sifup - Config the interface up and enable IP packets to pass.
745 #define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */
756 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
757 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
758 error("ioctl (SIOCGIFFLAGS): %m");
761 ifr.ifr_flags |= IFF_UP;
762 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
763 error("ioctl(SIOCSIFFLAGS): %m");
767 npi.protocol = PPP_IP;
768 npi.mode = NPMODE_PASS;
769 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
770 if (errno != ENOTTY) {
771 error("ioctl(PPPIOCSNPMODE): %m");
774 /* for backwards compatibility */
775 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
776 error("ioctl (PPPIOCGFLAGS): %m");
780 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
781 error("ioctl(PPPIOCSFLAGS): %m");
789 * sifdown - Config the interface down and disable IP.
801 npi.protocol = PPP_IP;
802 npi.mode = NPMODE_ERROR;
803 ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
804 /* ignore errors, because ttyfd might have been closed by now. */
807 strlcpy(ifr.ifr_name, sizeof (ifr.ifr_name), ifname);
808 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
809 error("ioctl (SIOCGIFFLAGS): %m");
812 ifr.ifr_flags &= ~IFF_UP;
813 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
814 error("ioctl(SIOCSIFFLAGS): %m");
823 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
826 #define SET_SA_FAMILY(addr, family) \
827 BZERO((char *) &(addr), sizeof(addr)); \
828 addr.sa_family = (family);
831 * sifaddr - Config the interface IP addresses and netmask.
842 strlcpy(ifr.ifr_name, sizeof(ifr.ifr_name), ifname);
843 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
844 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
845 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
846 error("ioctl(SIOCAIFADDR): %m");
849 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
850 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
851 error("ioctl(SIOCSIFDSTADDR): %m");
855 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
856 info("Setting interface mask to %s\n", ip_ntoa(m));
857 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
858 error("ioctl(SIOCSIFNETMASK): %m");
866 * cifaddr - Clear the interface IP addresses, and delete routes
867 * through the interface if possible.
869 * N.B.: under NextStep, you can't *delete* an address on an interface,
870 * so we change it to 0.0.0.0... A real hack. But it simplifies
871 * reconnection on the server side.
882 (void) sifaddr(u, o, h, 0L);
884 SET_SA_FAMILY(rt.rt_dst, AF_INET);
885 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
886 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
887 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
888 rt.rt_flags = RTF_HOST;
889 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
890 error("ioctl(SIOCDELRT): %m");
897 * sifdefaultroute - assign a default route through the address given.
900 sifdefaultroute(u, l, g)
904 return dodefaultroute(g, 's');
908 * cifdefaultroute - delete a default route through the address given.
911 cifdefaultroute(u, l, g)
915 return dodefaultroute(g, 'c');
919 * dodefaultroute - talk to a routing socket to add/delete a default route.
922 dodefaultroute(g, cmd)
928 SET_SA_FAMILY(rt.rt_dst, AF_INET);
929 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
930 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
931 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
932 rt.rt_flags = RTF_GATEWAY;
933 if (ioctl(sockfd, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
934 error("%cifdefaultroute: ioctl(%s): %m", cmd,
935 (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
938 default_route_gateway = (cmd == 's')? g: 0;
943 * sifproxyarp - Make a proxy ARP entry for the peer.
946 sifproxyarp(unit, hisaddr)
950 struct arpreq arpreq;
952 BZERO(&arpreq, sizeof(arpreq));
955 * Get the hardware address of an interface on the same subnet
956 * as our local address.
958 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
959 error("Cannot determine ethernet address for proxy ARP");
963 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
964 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
965 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
966 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
967 error("ioctl(SIOCSARP): %m");
971 proxy_arp_addr = hisaddr;
976 * cifproxyarp - Delete the proxy ARP entry for the peer.
979 cifproxyarp(unit, hisaddr)
983 struct arpreq arpreq;
985 BZERO(&arpreq, sizeof(arpreq));
986 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
987 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
988 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
989 warn("ioctl(SIOCDARP): %m");
997 * get_ether_addr - get the hardware address of an interface on the
998 * the same subnet as ipaddr.
1003 get_ether_addr(ipaddr, hwaddr)
1005 struct sockaddr *hwaddr;
1007 struct ifreq *ifr, *ifend, *ifp;
1008 u_int32_t ina, mask;
1009 struct ether_addr dla;
1012 struct ifreq ifs[MAX_IFS];
1013 struct hostent *hostent;
1015 ifc.ifc_len = sizeof(ifs);
1017 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1018 error("ioctl(SIOCGIFCONF): %m");
1023 * Scan through looking for an interface with an Internet
1024 * address on the same subnet as `ipaddr'.
1026 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1027 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1028 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1029 if (ifr->ifr_addr.sa_family == AF_INET) {
1030 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1031 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1033 * Check that the interface is up, and not point-to-point
1036 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1038 if ((ifreq.ifr_flags &
1039 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1040 != (IFF_UP|IFF_BROADCAST))
1043 * Get its netmask and check that it's on the right subnet.
1045 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1047 mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
1048 if ((ipaddr & mask) != (ina & mask))
1057 info("found interface %s for proxy arp", ifr->ifr_name);
1060 * Get the hostname and look for an entry using the ethers database.
1061 * Under NeXTStep this is the best we can do for now.
1063 if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
1066 if (ether_by_host(hostent->h_name, &dla)) {
1067 info("Add entry for %s in /etc/ethers", hostent->h_name);
1068 return 0; /* it's not there */
1070 hwaddr->sa_family = AF_UNSPEC;
1071 BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
1076 ether_by_host(hostname, etherptr)
1078 struct ether_addr *etherptr;
1080 struct ether_addr *thisptr;
1086 if (!ether_hostton(hostname, etherptr))
1089 * We shall now try and
1090 * find the address in the
1091 * top domain of netinfo.
1093 slprintf(path, sizeof(path), "/machines/%s", hostname);
1095 if (ni_open((void *)0, "/", &conn)
1096 || ni_root(conn, &root)
1097 || ni_pathsearch(conn, &root, path)
1098 || ni_lookupprop(conn, &root, "en_address", &val))
1102 * Now we can convert the returned string into an ethernet address.
1104 strlcpy(path, sizeof(path), val.ni_namelist_val[0]);
1106 if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
1108 BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
1115 * Return user specified netmask, modified by any mask we might determine
1116 * for address `addr' (in network byte order).
1117 * Here we scan through the system's list of interfaces, looking for
1118 * any non-point-to-point interfaces which might appear to be on the same
1119 * network as `addr'. If we find any, we OR in their netmask to the
1120 * user-specified netmask.
1126 u_int32_t mask, nmask, ina;
1127 struct ifreq *ifr, *ifend, ifreq;
1129 struct ifreq ifs[MAX_IFS];
1132 if (IN_CLASSA(addr)) /* determine network mask for address class */
1133 nmask = IN_CLASSA_NET;
1134 else if (IN_CLASSB(addr))
1135 nmask = IN_CLASSB_NET;
1137 nmask = IN_CLASSC_NET;
1138 /* class D nets are disallowed by bad_ip_adrs */
1139 mask = netmask | htonl(nmask);
1142 * Scan through the system's network interfaces.
1144 ifc.ifc_len = sizeof(ifs);
1146 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1147 warn("ioctl(SIOCGIFCONF): %m");
1150 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1151 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1152 ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
1154 * Check the interface's internet address.
1156 if (ifr->ifr_addr.sa_family != AF_INET)
1158 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1159 if ((ntohl(ina) & nmask) != (addr & nmask))
1162 * Check that the interface is up, and not point-to-point or loopback.
1164 strlcpy(ifreq.ifr_name, sizeof(ifreq.ifr_name), ifr->ifr_name);
1165 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1167 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1171 * Get its netmask and OR it into our mask.
1173 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1175 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1182 * have_route_to - determine if the system has any route to
1183 * a given IP address.
1184 * For demand mode to work properly, we have to ignore routes
1185 * through our own interface.
1187 int have_route_to(u_int32_t addr)
1194 * daemon - Detach us from the terminal session.
1197 daemon(nochdir, noclose)
1198 int nochdir, noclose;
1202 if ((pid = fork()) < 0)
1205 exit(0); /* parent dies */
1210 fclose(stdin); /* don't need stdin, stdout, stderr */
1222 char *d = malloc(strlen(s) + 1);
1224 if (d) strcpy(d, s);
1229 * This logwtmp() implementation is subject to the following copyright:
1231 * Copyright (c) 1988 The Regents of the University of California.
1232 * All rights reserved.
1234 * Redistribution and use in source and binary forms are permitted
1235 * provided that the above copyright notice and this paragraph are
1236 * duplicated in all such forms and that any documentation,
1237 * advertising materials, and other materials related to such
1238 * distribution and use acknowledge that the software was developed
1239 * by the University of California, Berkeley. The name of the
1240 * University may not be used to endorse or promote products derived
1241 * from this software without specific prior written permission.
1242 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1243 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1244 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1247 #define WTMPFILE "/usr/adm/wtmp"
1250 logwtmp(line, name, host)
1251 const char *line, *name, *host;
1257 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1259 if (!fstat(fd, &buf)) {
1260 strlcpy(ut.ut_line, sizeof(ut.ut_line), line);
1261 strlcpy(ut.ut_name, sizeof(ut.ut_name), name);
1262 strlcpy(ut.ut_host, sizeof(ut.ut_host), host);
1263 (void)time(&ut.ut_time);
1264 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1265 (void)ftruncate(fd, buf.st_size);
1271 * Routines for locking and unlocking the serial device, moved here
1275 #define LOCK_PREFIX "/usr/spool/uucp/LCK/LCK.."
1278 * lock - create a lock file for the named device
1288 if ((p = strrchr(dev, '/')) != NULL)
1290 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1291 lock_file = malloc(l);
1292 if (lock_file == NULL)
1293 novm("lock file name");
1294 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1296 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1298 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1299 /* Read the lock file to find out who has the device locked */
1300 n = read(fd, &pid, sizeof(pid));
1302 error("Can't read pid from lock file %s", lock_file);
1305 if (kill(pid, 0) == -1 && errno == ESRCH) {
1306 /* pid no longer exists - remove the lock file */
1307 if (unlink(lock_file) == 0) {
1309 notice("Removed stale lock on %s (pid %d)",
1313 warn("Couldn't remove stale lock on %s", dev);
1315 notice("Device %s is locked by pid %d",
1320 error("Can't create lock file %s: %m", lock_file);
1327 write(fd, &pid, sizeof pid);
1334 * unlock - remove our lockfile
1346 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1357 u_char let, code, size;
1359 size = (cmd >> 16) & IOCPARM_MASK;
1363 if (let == 't' && (75 <= code && code <= 90))
1364 info("ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1365 let, code, size, c);
1368 ret = ioctl(fd, cmd, c);
1373 info("ioctl('%c', %d, %d) errno = %d (%m)\n",
1374 let, code, size, errno);
1375 if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1376 int i, len = ((cmd >> 16) & IOCPARM_MASK);
1377 for (i = 0; i < len / 4; ++i)
1378 info("word[%d] @ 0x%06x = 0x%x\n",
1379 i, &((int *) c)[i],((int *)c)[i]);
1384 if (ret == -1 && errno == EPERM)
1388 #endif /* HAS_BROKEN_IOCTL */
1391 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1394 * These redefinitions of Posix functions are necessary
1395 * because HPPA systems have an OS bug that causes
1396 * sigaction to core dump:
1398 * AlainF 9-Nov-1994 HACK FOR HP-PA/NEXTSTEP
1399 * sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1400 * Posix lib. This causes pppd to SIGBUS at the expiration
1401 * of the first timeout (_sigtramp seems to invoke
1402 * the SIGALRM handler at an unreasonably low address).
1403 * All calls so sigaction(3) have been changed to calls
1404 * to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1406 * This is kind of a hack, especially since there are
1407 * other routines of the Posix lib still used, but
1410 * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1411 * have the same bug. Thus this fix has been enabled for SPARC also.
1416 int sigemptyset(sigset_t *mask)
1421 sigaddset(sigset_t *mask, int which_sig)
1423 *mask |= sigmask(which_sig);
1427 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1432 sv.sv_handler = act->sa_handler;
1433 sv.sv_mask = act->sa_mask;
1439 warn("PPPD: Inside modified HP and SPARC sigaction\n");
1442 return sigvec(sig, &sv, NULL);
1449 * Code following is added for 2.3 compatibility
1453 * get_idle_time - return how long the link has been idle.
1456 get_idle_time(u, ip)
1458 struct ppp_idle *ip;
1460 return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1465 * get_loop_output - read characters from the loopback, form them
1466 * into frames, and detect when we want to bring the real link up.
1467 * Return value is 1 if we need to bring up the link, 0 otherwise.
1477 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1478 if (loop_chars(inbuf, n))
1483 fatal("eof on loopback");
1484 if (errno != EWOULDBLOCK)
1485 fatal("read from loopback: %m");
1494 * sifnpmode - Set the mode for handling packets for a given NP.
1497 sifnpmode(u, proto, mode)
1504 npi.protocol = proto;
1506 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1507 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1515 * open_ppp_loopback - open the device we use for getting
1516 * packets in demand mode, and connect it to a ppp interface.
1517 * Here we use a pty.
1525 struct termios tios;
1526 int pppdisc = PPPDISC;
1528 fatal("open_ppp_loopback called!");
1530 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
1531 fatal("No free pty for loopback");
1532 SYSDEBUG(("using %s for loopback", loop_name));
1534 if (tcgetattr(loop_slave, &tios) == 0) {
1535 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1536 tios.c_cflag |= CS8 | CREAD;
1537 tios.c_iflag = IGNPAR;
1540 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1541 warn("couldn't set attributes on loopback: %m");
1544 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1545 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1546 warn("couldn't set loopback to nonblock: %m");
1549 if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0)
1550 fatal("ioctl(TIOCSETD): %m");
1553 * Find out which interface we were given.
1555 if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0)
1556 fatal("ioctl(PPPIOCGUNIT): %m");
1559 * Enable debug in the driver if requested.
1562 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1563 warn("ioctl (PPPIOCGFLAGS): %m");
1565 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1566 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1567 warn("ioctl(PPPIOCSFLAGS): %m");
1576 * restore_loop - reattach the ppp unit to the loopback.
1584 * Transfer the ppp interface back to the loopback.
1586 if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0)
1587 fatal("ioctl(transfer ppp unit): %m");
1589 if (ioctl(loop_slave, TIOCSETD, &x) < 0)
1590 fatal("ioctl(TIOCSETD): %m");
1593 * Check that we got the same unit again.
1595 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
1596 fatal("ioctl(PPPIOCGUNIT): %m");
1598 fatal("transfer_ppp failed: wanted unit %d, got %d",
1605 * Use the hostid as part of the random number seed.
1615 * sys_check_options - check the options that the user specified
1621 * We don't support demand dialing yet.
1625 option_error("PPP-2.3 for NeXTSTEP does not yet support demand dialing");
1633 * sys_close - Clean up in a child process before execing.
1639 if (loop_slave >= 0) {
1648 * wait_loop_output - wait until there is data available on the
1649 * loopback, for the length of time specified by *timo (indefinite
1652 void wait_loop_output(timo)
1653 struct timeval *timo;
1659 FD_SET(loop_master, &ready);
1660 n = select(loop_master + 1, &ready, NULL, &ready, timo);
1661 if (n < 0 && errno != EINTR)
1662 fatal("select: %m");
1666 * wait_time - wait for a given length of time or until a
1667 * signal is received.
1669 void wait_time(timo)
1670 struct timeval *timo;
1674 n = select(0, NULL, NULL, NULL, timo);
1675 if (n < 0 && errno != EINTR)
1676 fatal("select: %m");