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 1.7 1997/03/04 03:34:48 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 #include <netinet/ip.h>
50 #include <netinet/if_ether.h>
51 #include <net/route.h>
52 #include <netinet/in.h>
54 #include <netinfo/ni.h>
58 static int initdisc = -1; /* Initial TTY discipline */
59 static int initfdflags = -1; /* Initial file descriptor flags for fd */
60 static int ppp_fd = -1; /* fd which is set to PPP discipline */
61 static int loop_slave = -1;
62 static int loop_master;
63 static char loop_name[20];
67 static int restore_term; /* 1 => we've munged the terminal */
68 static struct termios inittermios; /* Initial TTY termios */
70 static char *lock_file;
72 static int sockfd; /* socket for doing interface ioctls */
74 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
78 static int if_is_up; /* the interface is currently up */
79 static u_int32_t default_route_gateway; /* gateway addr for default route */
80 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
82 /* Prototypes for procedures local to this file. */
83 static int translate_speed __P((int));
84 static int baud_rate_of __P((int));
85 static int dodefaultroute __P((u_int32_t, int));
86 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
87 static int ether_by_host __P((char *, struct ether_addr *));
91 * sys_init - System-dependent initialization.
96 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
97 setlogmask(LOG_UPTO(LOG_INFO));
99 /* Get an internet socket for doing socket ioctl's on. */
100 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
101 syslog(LOG_ERR, "Couldn't create IP socket: %m");
107 * sys_cleanup - restore any system state we modified before exiting:
108 * mark the interface down, delete default route and/or proxy arp entry.
109 * This should call die() because it's called from die().
117 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
118 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
119 && ((ifr.ifr_flags & IFF_UP) != 0)) {
120 ifr.ifr_flags &= ~IFF_UP;
121 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
125 if (default_route_gateway)
126 cifdefaultroute(0, 0, default_route_gateway);
128 cifproxyarp(0, proxy_arp_addr);
132 * note_debug_level - note a change in the debug level.
138 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
139 setlogmask(LOG_UPTO(LOG_DEBUG));
141 setlogmask(LOG_UPTO(LOG_WARNING));
146 * ppp_available - check whether the system has any ppp interfaces
147 * (in fact we check whether we can do an ioctl on ppp0).
154 extern char *no_ppp_msg;
156 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
157 return 1; /* can't tell - maybe we're not root */
159 strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
160 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
164 This system lacks kernel support for PPP. To include PPP support\n\
165 in the kernel, please follow the steps detailed in the README.NeXT\n\
166 file in the ppp-2.2 distribution.\n";
172 * establish_ppp - Turn the serial port into a ppp interface.
178 int pppdisc = PPPDISC;
181 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
182 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
185 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
186 syslog(LOG_ERR, "ioctl(establish TIOCSETD): %m");
191 * Find out which interface we were given.
193 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
194 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
199 * Enable debug in the driver if requested.
202 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
203 syslog(LOG_WARNING, "ioctl(PPPIOCGFLAGS): %m");
205 x |= (kdebugflag & 0xFF) * SC_DEBUG;
206 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
207 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
212 * Set device for non-blocking reads so PPPD can poll for
213 * input from the kernel.
215 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
216 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
217 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
224 * disestablish_ppp - Restore the serial port to normal operation.
225 * This shouldn't call die() because it's called from die().
231 /* Reset non-blocking mode on fd. */
232 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
233 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
236 /* Restore old line discipline. */
237 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
238 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
243 * Check whether the link seems not to be 8-bit clean.
251 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
253 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
255 s = "bit 7 set to 1";
258 s = "bit 7 set to 0";
268 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
269 syslog(LOG_WARNING, "All received characters had %s", s);
275 * List of valid speeds.
278 int speed_int, speed_val;
354 #warning Defining B115200
365 * Translate from bits/second to a speed_t.
371 struct speed *speedp;
375 for (speedp = speeds; speedp->speed_int; speedp++)
376 if (bps == speedp->speed_int)
377 return speedp->speed_val;
378 syslog(LOG_WARNING, "speed %d not supported", bps);
383 * Translate from a speed_t to bits/second.
389 struct speed *speedp;
393 for (speedp = speeds; speedp->speed_int; speedp++)
394 if (speed == speedp->speed_val)
395 return speedp->speed_int;
401 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
402 * at the requested speed, etc. If `local' is true, set CLOCAL
403 * regardless of whether the modem option was specified.
406 set_up_tty(fd, local)
409 int speed, x, modembits;
412 if (tcgetattr(fd, &tios) < 0) {
413 syslog(LOG_ERR, "tcgetattr: %m");
420 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
422 tios.c_cflag |= CS8 | CREAD | HUPCL;
424 tios.c_cflag |= CLOCAL;
426 tios.c_iflag = IGNBRK | IGNPAR;
430 tios.c_cc[VTIME] = 0;
433 tios.c_iflag |= IXON | IXOFF;
434 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
435 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
438 speed = translate_speed(inspeed);
440 cfsetospeed(&tios, speed);
441 cfsetispeed(&tios, speed);
443 speed = cfgetospeed(&tios);
445 * We can't proceed if the serial port speed is B0,
446 * since that implies that the serial port is disabled.
449 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
456 modembits = TIOCM_RTS | TIOCM_CTS;
457 if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
458 syslog(LOG_ERR, "ioctl: TIOCMBIS/BIC: %m");
461 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
462 syslog(LOG_ERR, "tcsetattr: %m");
466 baud_rate = inspeed = baud_rate_of(speed);
471 * restore_tty - restore the terminal to the saved settings.
478 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
480 syslog(LOG_WARNING, "tcsetattr: %m");
486 * setdtr - control the DTR line on the serial port.
487 * This is called from die(), so it shouldn't call die().
489 * The write hack is to get NXFax to recognize that there is
490 * activity on the port. Not using the write nukes
491 * NXFax's capability to determine port usage.
498 int modembits = TIOCM_DTR;
506 /* ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
507 ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
512 * output - Output PPP packet.
521 log_packet(p, len, "sent ");
523 if (write(ttyfd, p, len) < 0) {
524 if (errno == EWOULDBLOCK || errno == ENOBUFS
525 || errno == ENXIO || errno == EIO) {
526 syslog(LOG_WARNING, "write: warning: %m");
528 syslog(LOG_ERR, "write: %m");
536 * wait_input - wait until there is data available on ttyfd,
537 * for the length of time specified by *timo (indefinite
542 struct timeval *timo;
548 FD_SET(ttyfd, &ready);
549 n = select(ttyfd+1, &ready, NULL, &ready, timo);
550 if (n < 0 && errno != EINTR) {
551 syslog(LOG_ERR, "select: %m");
558 * read_packet - get a PPP packet from the serial device.
566 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
567 if (errno == EWOULDBLOCK || errno == EINTR) {
568 MAINDEBUG((LOG_DEBUG, "read: %m"));
571 syslog(LOG_ERR, "read: %m");
579 * ppp_send_config - configure the transmit characteristics of
583 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
591 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
593 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
594 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
598 if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
599 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
603 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
604 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
607 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
608 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
609 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
610 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
617 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
620 ppp_set_xaccm(unit, accm)
624 if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
625 syslog(LOG_WARNING, "ioctl(PPPIOCSXASYNCMAP): %m");
630 * ppp_recv_config - configure the receive-side characteristics of
634 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
641 if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
642 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
645 if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
646 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
649 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
650 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
653 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
654 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
655 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
735 if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
736 syslog(LOG_ERR, "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 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
758 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
759 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
762 ifr.ifr_flags |= IFF_UP;
763 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
764 syslog(LOG_ERR, "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 syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
775 /* for backwards compatibility */
776 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
777 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
781 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
782 syslog(LOG_ERR, "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 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
809 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
810 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
813 ifr.ifr_flags &= ~IFF_UP;
814 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
815 syslog(LOG_ERR, "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 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
856 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
857 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
858 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
859 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "%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 syslog(LOG_ERR, "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 syslog(LOG_ERR, "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 syslog(LOG_WARNING, "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 syslog(LOG_ERR, "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 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.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 syslog(LOG_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 syslog(LOG_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 strcat(strcpy(path, "/machines/"), 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 strcpy(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 syslog(LOG_WARNING, "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 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.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;
1185 * daemon - Detach us from the terminal session.
1188 daemon(nochdir, noclose)
1189 int nochdir, noclose;
1193 if ((pid = fork()) < 0)
1196 exit(0); /* parent dies */
1201 fclose(stdin); /* don't need stdin, stdout, stderr */
1213 char *d = malloc(strlen(s) + 1);
1215 if (d) strcpy(d, s);
1220 * This logwtmp() implementation is subject to the following copyright:
1222 * Copyright (c) 1988 The Regents of the University of California.
1223 * All rights reserved.
1225 * Redistribution and use in source and binary forms are permitted
1226 * provided that the above copyright notice and this paragraph are
1227 * duplicated in all such forms and that any documentation,
1228 * advertising materials, and other materials related to such
1229 * distribution and use acknowledge that the software was developed
1230 * by the University of California, Berkeley. The name of the
1231 * University may not be used to endorse or promote products derived
1232 * from this software without specific prior written permission.
1233 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
1234 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
1235 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1238 #define WTMPFILE "/usr/adm/wtmp"
1241 logwtmp(line, name, host)
1242 const char *line, *name, *host;
1248 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1250 if (!fstat(fd, &buf)) {
1251 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1252 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1253 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1254 (void)time(&ut.ut_time);
1255 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1256 (void)ftruncate(fd, buf.st_size);
1262 * Routines for locking and unlocking the serial device, moved here
1266 #define LOCK_PREFIX "/usr/spool/uucp/LCK/LCK.."
1269 * lock - create a lock file for the named device
1278 if ((p = strrchr(dev, '/')) != NULL)
1280 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1281 if (lock_file == NULL)
1282 novm("lock file name");
1283 strcat(strcpy(lock_file, 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 syslog(LOG_ERR, "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 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1302 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1305 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1310 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1317 write(fd, &pid, sizeof pid);
1324 * unlock - remove our lockfile
1336 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
1347 u_char let, code, size;
1349 size = (cmd >> 16) & IOCPARM_MASK;
1353 if (let == 't' && (75 <= code && code <= 90))
1354 syslog(LOG_INFO, "ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
1355 let, code, size, c);
1358 ret = ioctl(fd, cmd, c);
1363 syslog(LOG_INFO, "ioctl('%c', %d, %d) errno = %d (%m)\n",
1364 let, code, size, errno);
1365 if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
1366 int i, len = ((cmd >> 16) & IOCPARM_MASK);
1367 for (i = 0; i < len / 4; ++i)
1368 syslog(LOG_INFO, "word[%d] @ 0x%06x = 0x%x\n",
1369 i, &((int *) c)[i],((int *)c)[i]);
1374 if (ret == -1 && errno == EPERM)
1378 #endif /* HAS_BROKEN_IOCTL */
1381 #if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
1384 * These redefinitions of Posix functions are necessary
1385 * because HPPA systems have an OS bug that causes
1386 * sigaction to core dump:
1388 * AlainF 9-Nov-1994 HACK FOR HP-PA/NEXTSTEP
1389 * sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
1390 * Posix lib. This causes pppd to SIGBUS at the expiration
1391 * of the first timeout (_sigtramp seems to invoke
1392 * the SIGALRM handler at an unreasonably low address).
1393 * All calls so sigaction(3) have been changed to calls
1394 * to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
1396 * This is kind of a hack, especially since there are
1397 * other routines of the Posix lib still used, but
1400 * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
1401 * have the same bug. Thus this fix has been enabled for SPARC also.
1406 int sigemptyset(sigset_t *mask)
1411 sigaddset(sigset_t *mask, int which_sig)
1413 *mask |= sigmask(which_sig);
1417 int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
1422 sv.sv_handler = act->sa_handler;
1423 sv.sv_mask = act->sa_mask;
1429 syslog(LOG_WARNING, "PPPD: Inside modified HP and SPARC sigaction\n");
1432 return sigvec(sig, &sv, NULL);
1439 * Code following is added for 2.3 compatibility
1443 * get_idle_time - return how long the link has been idle.
1446 get_idle_time(u, ip)
1448 struct ppp_idle *ip;
1450 return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0);
1455 * get_loop_output - read characters from the loopback, form them
1456 * into frames, and detect when we want to bring the real link up.
1457 * Return value is 1 if we need to bring up the link, 0 otherwise.
1467 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
1468 if (loop_chars(inbuf, n))
1473 syslog(LOG_ERR, "eof on loopback");
1475 } else if (errno != EWOULDBLOCK){
1476 syslog(LOG_ERR, "read from loopback: %m");
1487 * sifnpmode - Set the mode for handling packets for a given NP.
1490 sifnpmode(u, proto, mode)
1497 npi.protocol = proto;
1499 if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
1500 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
1508 * open_ppp_loopback - open the device we use for getting
1509 * packets in demand mode, and connect it to a ppp interface.
1510 * Here we use a pty.
1518 struct termios tios;
1519 int pppdisc = PPPDISC;
1521 syslog(LOG_ERR, "open_ppp_loopback called!");
1524 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
1525 syslog(LOG_ERR, "No free pty for loopback");
1528 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
1530 if (tcgetattr(loop_slave, &tios) == 0) {
1531 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1532 tios.c_cflag |= CS8 | CREAD;
1533 tios.c_iflag = IGNPAR;
1536 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
1537 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
1540 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
1541 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
1542 syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
1545 if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0) {
1546 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
1551 * Find out which interface we were given.
1553 if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0) {
1554 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
1559 * Enable debug in the driver if requested.
1562 if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
1563 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
1565 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
1566 if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
1567 syslog(LOG_WARNING, "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 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
1591 if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
1592 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
1597 * Check that we got the same unit again.
1599 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {
1600 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
1604 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
1613 * sys_check_options - check the options that the user specified
1619 * We don't support demand dialing yet.
1623 syslog(LOG_WARNING, "PPP-2.3 for NeXTSTEP does not yet support demand dialing\n");
1630 * sys_close - Clean up in a child process before execing.
1636 if (loop_slave >= 0) {
1645 * wait_loop_output - wait until there is data available on the
1646 * loopback, for the length of time specified by *timo (indefinite
1649 void wait_loop_output(timo)
1650 struct timeval *timo;
1656 FD_SET(loop_master, &ready);
1657 n = select(loop_master + 1, &ready, NULL, &ready, timo);
1658 if (n < 0 && errno != EINTR) {
1659 syslog(LOG_ERR, "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 syslog(LOG_ERR, "select: %m");