2 * sys-aix4.c - System-dependent procedures for setting up
3 * PPP interfaces on AIX systems which use the STREAMS ppp interface.
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * Copyright (c) 1995 The Australian National University.
9 * Redistribution and use in source and binary forms are permitted
10 * provided that the above copyright notice and this paragraph are
11 * duplicated in all such forms and that any documentation,
12 * advertising materials, and other materials related to such
13 * distribution and use acknowledge that the software was developed
14 * by Carnegie Mellon University and The Australian National University.
15 * The names of the Universities may not be used to endorse or promote
16 * products derived from this software without specific prior written
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
24 static char rcsid[] = "$Id: sys-aix4.c,v 1.14 1999/03/08 01:46:19 paulus Exp $";
38 #include <sys/termiox.h>
44 #include <sys/types.h>
45 #include <sys/socket.h>
47 #include <sys/stream.h>
48 #include <sys/stropts.h>
51 #include <net/ppp_defs.h>
52 #include <net/route.h>
53 #include <net/if_arp.h>
54 #include <netinet/in.h>
59 #define ifr_mtu ifr_metric
62 #define MAXMODULES 10 /* max number of module names to save */
63 static struct modlist {
64 char modname[FMNAMESZ+1];
65 } str_modules[MAXMODULES];
66 static int str_module_count = 0;
67 static int pushed_ppp;
68 static int closed_stdio;
70 static int restore_term; /* 1 => we've munged the terminal */
71 static struct termios inittermios; /* Initial TTY termios */
72 static int initfdflags = -1; /* Initial file descriptor flags for fd */
74 static int sockfd; /* socket for doing interface ioctls */
76 static int if_is_up; /* Interface has been marked up */
77 static u_int32_t ifaddrs[2]; /* local and remote addresses */
78 static u_int32_t default_route_gateway; /* Gateway for default route added */
79 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
81 /* Prototypes for procedures local to this file. */
82 static int translate_speed __P((int));
83 static int baud_rate_of __P((int));
84 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
88 * sys_init - System-dependent initialization.
93 /* Get an internet socket for doing socket ioctl's on. */
94 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
95 syslog(LOG_ERR, "Couldn't create IP socket: %m");
101 * sys_cleanup - restore any system state we modified before exiting:
102 * mark the interface down, delete default route and/or proxy arp entry.
103 * This should call die() because it's called from die().
111 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
112 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
113 && ((ifr.ifr_flags & IFF_UP) != 0)) {
114 ifr.ifr_flags &= ~IFF_UP;
115 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
119 cifaddr(0, ifaddrs[0], ifaddrs[1]);
120 if (default_route_gateway)
121 cifdefaultroute(0, 0, default_route_gateway);
123 cifproxyarp(0, proxy_arp_addr);
127 * have_route_to - determine if the system has any route to
128 * a given IP address.
129 * For demand mode to work properly, we have to ignore routes
130 * through our own interface.
132 int have_route_to(u_int32_t addr)
139 * daemon - Detach us from the terminal session.
142 daemon(nochdir, noclose)
143 int nochdir, noclose;
147 if ((pid = fork()) < 0)
150 exit(0); /* parent dies */
155 fclose(stdin); /* don't need stdin, stdout, stderr */
164 * ppp_available - check if this kernel supports PPP.
171 fd = open("/dev/tty", O_RDONLY, 0);
173 return 1; /* can't find out - assume we have ppp */
174 ret = ioctl(fd, I_FIND, "pppasync") >= 0;
181 * establish_ppp - Turn the serial port into a ppp interface.
187 /* go through and save the name of all the modules, then pop em */
189 if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
190 ioctl(fd, I_POP, 0) < 0)
192 MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
193 str_modules[str_module_count].modname));
197 /* now push the async/fcs module */
198 if (ioctl(fd, I_PUSH, "pppasync") < 0) {
199 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
202 /* push the compress module */
203 if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
204 syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
206 /* finally, push the ppp_if module that actually handles the */
207 /* network interface */
208 if (ioctl(fd, I_PUSH, "pppif") < 0) {
209 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
213 /* read mode, message non-discard mode
214 if (ioctl(fd, I_SRDOPT, RMSGN) < 0) {
215 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
220 * Find out which interface we were given.
221 * (ppp_if handles this ioctl)
223 if (ioctl(fd, SIOCGETU, &ifunit) < 0) {
224 syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
228 /* Set debug flags in driver */
229 if (ioctl(fd, SIOCSIFDEBUG, kdebugflag) < 0) {
230 syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
233 /* close stdin, stdout, stderr if they might refer to the device */
234 if (default_device && !closed_stdio) {
237 for (i = 0; i <= 2; ++i)
238 if (i != fd && i != sockfd)
244 * Set device for non-blocking reads.
246 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
247 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
248 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
253 * disestablish_ppp - Restore the serial port to normal operation.
254 * It attempts to reconstruct the stream with the previously popped
255 * modules. This shouldn't call die() because it's called from die().
264 /* Reset non-blocking mode on the file descriptor. */
265 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
266 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
270 /* we can't push or pop modules after the stream has hung up */
271 str_module_count = 0;
272 restore_term = 0; /* nor can we fix up terminal settings */
278 * Check whether the link seems not to be 8-bit clean.
280 if (ioctl(fd, SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
282 switch (~flags & PAI_FLAGS_HIBITS) {
284 s = "bit 7 set to 1";
287 s = "bit 7 set to 0";
289 case PAI_FLAGS_PAR_EVEN:
292 case PAI_FLAGS_PAR_ODD:
297 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
298 syslog(LOG_WARNING, "All received characters had %s", s);
303 while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
307 for (; str_module_count > 0; str_module_count--) {
308 if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
310 syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
311 str_modules[str_module_count-1].modname);
313 MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
314 str_modules[str_module_count-1].modname));
321 * List of valid speeds.
324 int speed_int, speed_val;
396 * Translate from bits/second to a speed_t.
402 struct speed *speedp;
406 for (speedp = speeds; speedp->speed_int; speedp++)
407 if (bps == speedp->speed_int)
408 return speedp->speed_val;
409 syslog(LOG_WARNING, "speed %d not supported", bps);
414 * Translate from a speed_t to bits/second.
420 struct speed *speedp;
424 for (speedp = speeds; speedp->speed_int; speedp++)
425 if (speed == speedp->speed_val)
426 return speedp->speed_int;
431 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
432 * at the requested speed, etc. If `local' is true, set CLOCAL
433 * regardless of whether the modem option was specified.
436 set_up_tty(fd, local)
443 if (tcgetattr(fd, &tios) < 0) {
444 syslog(LOG_ERR, "tcgetattr: %m");
451 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
453 bzero(&tiox, sizeof(tiox));
454 ioctl(fd, TCGETX, &tiox);
455 tiox.x_hflag = RTSXOFF;
456 ioctl(fd, TCSETX, &tiox);
457 tios.c_cflag &= ~(IXON | IXOFF);
458 } else if (crtscts < 0) {
459 bzero(&tiox, sizeof(tiox));
460 ioctl(fd, TCGETX, &tiox);
461 tiox.x_hflag &= ~RTSXOFF;
462 ioctl(fd, TCSETX, &tiox);
466 tios.c_cflag |= CS8 | CREAD | HUPCL;
468 tios.c_cflag |= CLOCAL;
469 tios.c_iflag = IGNBRK | IGNPAR;
473 tios.c_cc[VTIME] = 0;
476 tios.c_iflag |= IXON | IXOFF;
477 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
478 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
481 speed = translate_speed(inspeed);
483 cfsetospeed(&tios, speed);
484 cfsetispeed(&tios, speed);
486 speed = cfgetospeed(&tios);
488 * We can't proceed if the serial port speed is B0,
489 * since that implies that the serial port is disabled.
492 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
498 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
499 syslog(LOG_ERR, "tcsetattr: %m");
503 baud_rate = inspeed = baud_rate_of(speed);
508 * restore_tty - restore the terminal to the saved settings.
515 if (!default_device) {
517 * Turn off echoing, because otherwise we can get into
518 * a loop with the tty and the modem echoing to each other.
519 * We presume we are the sole user of this tty device, so
520 * when we close it, it will revert to its defaults anyway.
522 inittermios.c_lflag &= ~(ECHO | ECHONL);
524 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
526 syslog(LOG_WARNING, "tcsetattr: %m");
532 * setdtr - control the DTR line on the serial port.
533 * This is called from die(), so it shouldn't call die().
539 int modembits = TIOCM_DTR;
541 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
546 * output - Output PPP packet.
559 log_packet(p, len, "sent ", LOG_DEBUG);
562 str.buf = (caddr_t) p;
564 while (putmsg(ttyfd, NULL, &str, 0) < 0) {
565 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
567 syslog(LOG_ERR, "Couldn't send packet: %m");
571 pfd.events = POLLOUT;
572 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
577 * wait_input - wait for input, for a length of time specified in *timo.
581 struct timeval *timo;
586 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
588 pfd.events = POLLIN | POLLPRI | POLLHUP;
589 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
590 syslog(LOG_ERR, "poll: %m");
596 * read_packet - get a PPP packet from the serial device.
602 struct strbuf str, ctl;
604 unsigned char ctlbuf[16];
606 str.maxlen = PPP_MTU + PPP_HDRLEN;
607 str.buf = (caddr_t) buf;
608 ctl.maxlen = sizeof(ctlbuf);
609 ctl.buf = (caddr_t) ctlbuf;
611 len = getmsg(ttyfd, &ctl, &str, &i);
613 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
616 syslog(LOG_ERR, "getmsg %m");
620 MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
622 syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
623 ctlbuf[0], ctlbuf[1]);
626 MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
635 * ppp_send_config - configure the transmit characteristics of
639 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
647 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
649 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
650 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
654 if(ioctl(ttyfd, SIOCSIFASYNCMAP, asyncmap) < 0) {
655 syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
660 if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0) {
661 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
666 if(ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0) {
667 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
674 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
677 ppp_set_xaccm(unit, accm)
681 if (ioctl(ttyfd, SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
682 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
687 * ppp_recv_config - configure the receive-side characteristics of
691 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
698 if (ioctl(ttyfd, SIOCSIFMRU, mru) < 0) {
699 syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
702 if (ioctl(ttyfd, SIOCSIFRASYNCMAP, (caddr_t) asyncmap) < 0) {
703 syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
706 c = 2 + (pcomp? 1: 0);
707 if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0) {
708 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
711 c = 2 + (accomp? 1: 0);
712 if (ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0) {
713 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
718 * ccp_test - ask kernel whether a given compression method
719 * is acceptable for use.
722 ccp_test(unit, opt_ptr, opt_len, for_transmit)
723 int unit, opt_len, for_transmit;
726 struct ppp_option_data data;
728 if ((unsigned) opt_len > MAX_PPP_OPTION)
729 opt_len = MAX_PPP_OPTION;
730 data.length = opt_len;
731 data.transmit = for_transmit;
732 BCOPY(opt_ptr, data.opt_data, opt_len);
733 if (ioctl(ttyfd, SIOCSCOMPRESS, &data) >= 0)
735 return (errno == ENOSR)? 0: -1;
739 * ccp_flags_set - inform kernel about the current state of CCP.
742 ccp_flags_set(unit, isopen, isup)
743 int unit, isopen, isup;
747 x = (isopen? 1: 0) + (isup? 2: 0);
748 if (ioctl(ttyfd, SIOCSIFCOMP, x) < 0 && errno != ENOTTY)
749 syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
753 * ccp_fatal_error - returns 1 if decompression was disabled as a
754 * result of an error detected after decompression of a packet,
755 * 0 otherwise. This is necessary because of patent nonsense.
758 ccp_fatal_error(unit)
763 if (ioctl(ttyfd, SIOCGIFCOMP, &x) < 0) {
764 syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
767 return x & CCP_FATALERROR;
771 * sifvjcomp - config tcp header compression
774 sifvjcomp(u, vjcomp, cidcomp, maxcid)
775 int u, vjcomp, cidcomp, maxcid;
779 x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
780 if (ioctl(ttyfd, SIOCSIFVJCOMP, x) < 0) {
781 syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
788 * sifup - Config the interface up and enable IP packets to pass.
796 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
797 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
798 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
801 ifr.ifr_flags |= IFF_UP;
802 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
803 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
812 * sifnpmode - Set the mode for handling packets for a given NP.
815 sifnpmode(u, proto, mode)
822 npi.protocol = proto;
824 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
825 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
832 * sifdown - Config the interface down.
843 npi.protocol = PPP_IP;
844 npi.mode = NPMODE_ERROR;
845 ioctl(ttyfd, SIOCSETNPMODE, &npi);
846 /* ignore errors, because ttyfd might have been closed by now. */
848 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
849 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
850 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
853 ifr.ifr_flags &= ~IFF_UP;
854 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
855 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
864 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
866 #define SET_SA_FAMILY(addr, family) \
867 BZERO((char *) &(addr), sizeof(addr)); \
868 addr.sa_family = (family);
871 * sifaddr - Config the interface IP addresses and netmask.
882 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
883 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
885 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
886 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
887 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
888 syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
893 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
894 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
895 syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
899 SET_SA_FAMILY(ifr.ifr_dstaddr, AF_INET);
900 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
901 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
902 syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
906 /* XXX is this necessary? */
907 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
908 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
909 syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
919 * cifaddr - Clear the interface IP addresses, and delete routes
920 * through the interface if possible.
930 BZERO(&rt, sizeof(rt));
931 SET_SA_FAMILY(rt.rt_dst, AF_INET);
932 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
933 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
934 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
935 rt.rt_flags = RTF_HOST;
936 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
937 syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
944 * sifdefaultroute - assign a default route through the address given.
947 sifdefaultroute(u, l, g)
953 BZERO(&rt, sizeof(rt));
954 SET_SA_FAMILY(rt.rt_dst, AF_INET);
955 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
956 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
957 rt.rt_flags = RTF_GATEWAY;
958 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
959 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
962 default_route_gateway = g;
967 * cifdefaultroute - delete a default route through the address given.
970 cifdefaultroute(u, l, g)
976 BZERO(&rt, sizeof(rt));
977 SET_SA_FAMILY(rt.rt_dst, AF_INET);
978 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
979 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
980 rt.rt_flags = RTF_GATEWAY;
981 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
982 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
985 default_route_gateway = 0;
990 * sifproxyarp - Make a proxy ARP entry for the peer.
993 sifproxyarp(unit, hisaddr)
997 struct arpreq arpreq;
999 BZERO(&arpreq, sizeof(arpreq));
1002 * Get the hardware address of an interface on the same subnet
1003 * as our local address.
1005 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1006 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1010 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1011 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1012 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1013 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1014 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1018 proxy_arp_addr = hisaddr;
1023 * cifproxyarp - Delete the proxy ARP entry for the peer.
1026 cifproxyarp(unit, hisaddr)
1030 struct arpreq arpreq;
1032 BZERO(&arpreq, sizeof(arpreq));
1033 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1034 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1035 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1036 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1044 * get_ether_addr - get the hardware address of an interface on the
1045 * the same subnet as ipaddr. Code borrowed from myetheraddr.c
1046 * in the cslip-2.6 distribution, which is subject to the following
1047 * copyright notice (which also applies to logwtmp below):
1049 * Copyright (c) 1990, 1992 The Regents of the University of California.
1050 * All rights reserved.
1052 * Redistribution and use in source and binary forms, with or without
1053 * modification, are permitted provided that: (1) source code distributions
1054 * retain the above copyright notice and this paragraph in its entirety, (2)
1055 * distributions including binary code include the above copyright notice and
1056 * this paragraph in its entirety in the documentation or other materials
1057 * provided with the distribution, and (3) all advertising materials mentioning
1058 * features or use of this software display the following acknowledgement:
1059 * ``This product includes software developed by the University of California,
1060 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
1061 * the University nor the names of its contributors may be used to endorse
1062 * or promote products derived from this software without specific prior
1063 * written permission.
1064 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
1065 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
1066 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1070 #include <arpa/inet.h>
1071 #include <netinet/in_var.h>
1072 #include <net/if_dl.h>
1074 /* Cast a struct sockaddr to a structaddr_in */
1075 #define SATOSIN(sa) ((struct sockaddr_in *)(sa))
1077 /* Determine if "bits" is set in "flag" */
1078 #define ALLSET(flag, bits) (((flag) & (bits)) == (bits))
1080 static struct nlist nl[] = {
1086 int kvm_read(int fd, off_t offset, void *buf, int nbytes)
1088 if (lseek(fd, offset, SEEK_SET) != offset) {
1089 syslog(LOG_ERR,"lseek in kmem: %m");
1092 return(read(fd, buf, nbytes));
1096 get_ether_addr(ipaddr, hwaddr)
1098 struct sockaddr *hwaddr;
1101 register struct ifnet *ifp;
1102 register struct arpcom *ac;
1103 struct arpcom arpcom;
1104 struct in_addr *inp;
1105 register struct ifaddr *ifa;
1106 register struct in_ifaddr *in;
1109 struct in_ifaddr in;
1111 struct ifaddr *ifap;
1112 struct sockaddr ifaddrsaddr;
1113 struct sockaddr_in ifmasksaddr;
1114 struct sockaddr_in *ifinetptr;
1115 struct sockaddr_dl *iflinkptr;
1116 u_long addr, mask, ifip;
1119 /* Open kernel memory for reading */
1120 if ((kd = open("/dev/kmem", O_RDONLY)) < 0) {
1121 syslog(LOG_ERR, "/dev/kmem: %m");
1125 /* Fetch namelist */
1126 if (nlist("/unix", nl) != 0) {
1127 syslog(LOG_ERR, "nlist(): %m");
1132 ifp = &arpcom.ac_if;
1136 if (kvm_read(kd, nl[N_IFNET].n_value, (char *)&addr, sizeof(addr))
1138 syslog(LOG_ERR, "error reading ifnet addr");
1141 for ( ; addr && !found; addr = (u_long)ifp->if_next) {
1142 if (kvm_read(kd, addr, (char *)ac, sizeof(*ac)) != sizeof(*ac)) {
1143 syslog(LOG_ERR, "error reading ifnet");
1147 /* Only look at configured, broadcast interfaces */
1148 if (!ALLSET(ifp->if_flags, IFF_UP | IFF_BROADCAST))
1150 /* This probably can't happen... */
1151 if (ifp->if_addrlist == 0)
1154 /* Get interface ip address */
1155 for (ifap = ifp->if_addrlist; ifap; ifap=ifaddr.ifa.ifa_next) {
1156 if (kvm_read(kd, (u_long)ifap, (char *)&ifaddr,
1157 sizeof(ifaddr)) != sizeof(ifaddr)) {
1158 syslog(LOG_ERR, "error reading ifaddr");
1161 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_addr, &ifaddrsaddr,
1162 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1163 syslog(LOG_ERR, "error reading ifaddrsaddr");
1166 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
1167 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1168 syslog(LOG_ERR, "error reading ifmasksaddr");
1171 /* Check if this interface on the right subnet */
1172 switch (ifaddrsaddr.sa_family) {
1174 hwaddr->sa_family = AF_UNSPEC;
1175 iflinkptr = (struct sockaddr_dl *) &ifaddrsaddr;
1176 bcopy(LLADDR(iflinkptr),hwaddr->sa_data,iflinkptr->sdl_alen);
1179 ifinetptr= (struct sockaddr_in *) &ifaddrsaddr;
1180 ifip = ifinetptr->sin_addr.s_addr;
1181 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
1182 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1183 syslog(LOG_ERR, "error reading ifmasksaddr");
1186 mask = ifmasksaddr.sin_addr.s_addr;
1187 if ((ipaddr & mask) == (ifip & mask))
1200 * Return user specified netmask, modified by any mask we might determine
1201 * for address `addr' (in network byte order).
1202 * Here we scan through the system's list of interfaces, looking for
1203 * any non-point-to-point interfaces which might appear to be on the same
1204 * network as `addr'. If we find any, we OR in their netmask to the
1205 * user-specified netmask.
1213 u_int32_t mask, nmask, ina;
1214 struct ifreq *ifr, *ifend, ifreq;
1216 struct ifreq ifs[MAX_IFS];
1219 if (IN_CLASSA(addr)) /* determine network mask for address class */
1220 nmask = IN_CLASSA_NET;
1221 else if (IN_CLASSB(addr))
1222 nmask = IN_CLASSB_NET;
1224 nmask = IN_CLASSC_NET;
1225 /* class D nets are disallowed by bad_ip_adrs */
1226 mask = netmask | htonl(nmask);
1229 * Scan through the system's network interfaces.
1231 ifc.ifc_len = sizeof(ifs);
1233 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1234 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1237 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1238 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1240 * Check the interface's internet address.
1242 if (ifr->ifr_addr.sa_family != AF_INET)
1244 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1245 if ((ntohl(ina) & nmask) != (addr & nmask))
1248 * Check that the interface is up, and not point-to-point or loopback.
1250 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1251 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1253 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1257 * Get its netmask and OR it into our mask.
1259 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1261 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1267 #define WTMPFILE "/var/adm/wtmp"
1270 logwtmp(line, name, host)
1271 const char *line, *name, *host;
1277 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1279 if (!fstat(fd, &buf)) {
1280 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1281 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1282 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1283 (void)time(&ut.ut_time);
1284 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1285 (void)ftruncate(fd, buf.st_size);
1291 * Use the hostid as part of the random number seed.
1300 * Code for locking/unlocking the serial device.
1303 static char *devlocked = (char *) 0;
1305 int lock(char *device)
1310 if (devname = strrchr(device,'/'))
1315 if ((rc = ttylock(devname)) == 0) {
1316 devlocked = (char *) malloc(strlen(devname) + 1);
1317 sprintf(devlocked,"%s",devname);
1319 devlocked = (char *) 0;
1329 rc = ttyunlock(devlocked);
1331 devlocked = (char *) 0;