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) 1994-2002 Paul Mackerras. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. The name(s) of the authors of this software must not be used to
15 * endorse or promote products derived from this software without
16 * prior written permission.
18 * 3. Redistributions of any form whatsoever must retain the following
20 * "This product includes software developed by Paul Mackerras
21 * <paulus@samba.org>".
23 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
24 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
25 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
26 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
27 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
28 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
29 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
31 * Derived from main.c and pppd.h, which are:
33 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
47 * 3. The name "Carnegie Mellon University" must not be used to
48 * endorse or promote products derived from this software without
49 * prior written permission. For permission or any legal
50 * details, please contact
51 * Office of Technology Transfer
52 * Carnegie Mellon University
54 * Pittsburgh, PA 15213-3890
55 * (412) 268-4387, fax: (412) 268-7395
56 * tech-transfer@andrew.cmu.edu
58 * 4. Redistributions of any form whatsoever must retain the following
60 * "This product includes software developed by Computing Services
61 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
63 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
64 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
65 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
66 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
67 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
68 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
69 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
72 #define RCSID "$Id: sys-aix4.c,v 1.24 2004/11/04 10:02:26 paulus Exp $"
84 #include <sys/termiox.h>
90 #include <sys/types.h>
91 #include <sys/socket.h>
93 #include <sys/stream.h>
94 #include <sys/stropts.h>
97 #include <net/ppp_defs.h>
98 #include <net/route.h>
99 #include <net/if_arp.h>
100 #include <netinet/in.h>
104 static const char rcsid[] = RCSID;
107 #define ifr_mtu ifr_metric
110 #define MAXMODULES 10 /* max number of module names to save */
111 static struct modlist {
112 char modname[FMNAMESZ+1];
113 } str_modules[MAXMODULES];
114 static int str_module_count = 0;
115 static int pushed_ppp;
116 static int closed_stdio;
118 static int restore_term; /* 1 => we've munged the terminal */
119 static struct termios inittermios; /* Initial TTY termios */
120 static int initfdflags = -1; /* Initial file descriptor flags for fd */
122 static int sockfd; /* socket for doing interface ioctls */
124 static int if_is_up; /* Interface has been marked up */
125 static u_int32_t ifaddrs[2]; /* local and remote addresses */
126 static u_int32_t default_route_gateway; /* Gateway for default route added */
127 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
129 #define MAX_POLLFDS 32
130 static struct pollfd pollfds[MAX_POLLFDS];
131 static int n_pollfds;
133 /* Prototypes for procedures local to this file. */
134 static int translate_speed __P((int));
135 static int baud_rate_of __P((int));
136 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
140 * sys_init - System-dependent initialization.
145 /* Get an internet socket for doing socket ioctl's on. */
146 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
147 fatal("Couldn't create IP socket: %m");
153 * sys_cleanup - restore any system state we modified before exiting:
154 * mark the interface down, delete default route and/or proxy arp entry.
155 * This should call die() because it's called from die().
163 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
164 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
165 && ((ifr.ifr_flags & IFF_UP) != 0)) {
166 ifr.ifr_flags &= ~IFF_UP;
167 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
171 cifaddr(0, ifaddrs[0], ifaddrs[1]);
172 if (default_route_gateway)
173 cifdefaultroute(0, 0, default_route_gateway);
175 cifproxyarp(0, proxy_arp_addr);
179 * have_route_to - determine if the system has any route to
180 * a given IP address.
181 * For demand mode to work properly, we have to ignore routes
182 * through our own interface.
184 int have_route_to(u_int32_t addr)
191 * daemon - Detach us from the terminal session.
194 daemon(nochdir, noclose)
195 int nochdir, noclose;
199 if ((pid = fork()) < 0)
202 exit(0); /* parent dies */
207 fclose(stdin); /* don't need stdin, stdout, stderr */
216 * ppp_available - check if this kernel supports PPP.
223 fd = open("/dev/tty", O_RDONLY, 0);
225 return 1; /* can't find out - assume we have ppp */
226 ret = ioctl(fd, I_FIND, "pppasync") >= 0;
233 * establish_ppp - Turn the serial port into a ppp interface.
239 /* go through and save the name of all the modules, then pop em */
241 if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
242 ioctl(fd, I_POP, 0) < 0)
244 SYSDEBUG(("popped stream module : %s",
245 str_modules[str_module_count].modname));
249 /* now push the async/fcs module */
250 if (ioctl(fd, I_PUSH, "pppasync") < 0)
251 fatal("ioctl(I_PUSH, ppp_async): %m");
252 /* push the compress module */
253 if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
254 warn("ioctl(I_PUSH, ppp_comp): %m");
256 /* finally, push the ppp_if module that actually handles the */
257 /* network interface */
258 if (ioctl(fd, I_PUSH, "pppif") < 0)
259 fatal("ioctl(I_PUSH, ppp_if): %m");
261 /* read mode, message non-discard mode
262 if (ioctl(fd, I_SRDOPT, RMSGN) < 0)
263 fatal("ioctl(I_SRDOPT, RMSGN): %m");
266 * Find out which interface we were given.
267 * (ppp_if handles this ioctl)
269 if (ioctl(fd, SIOCGETU, &ifunit) < 0)
270 fatal("ioctl(SIOCGETU): %m");
272 /* Set debug flags in driver */
273 if (ioctl(fd, SIOCSIFDEBUG, kdebugflag) < 0) {
274 error("ioctl(SIOCSIFDEBUG): %m");
277 /* close stdin, stdout, stderr if they might refer to the device */
278 if (default_device && !closed_stdio) {
281 for (i = 0; i <= 2; ++i)
282 if (i != fd && i != sockfd)
288 * Set device for non-blocking reads.
290 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
291 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
292 warn("Couldn't set device to non-blocking mode: %m");
299 * disestablish_ppp - Restore the serial port to normal operation.
300 * It attempts to reconstruct the stream with the previously popped
301 * modules. This shouldn't call die() because it's called from die().
310 /* Reset non-blocking mode on the file descriptor. */
311 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
312 warn("Couldn't restore device fd flags: %m");
316 /* we can't push or pop modules after the stream has hung up */
317 str_module_count = 0;
318 restore_term = 0; /* nor can we fix up terminal settings */
324 * Check whether the link seems not to be 8-bit clean.
326 if (ioctl(fd, SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
328 switch (~flags & PAI_FLAGS_HIBITS) {
330 s = "bit 7 set to 1";
333 s = "bit 7 set to 0";
335 case PAI_FLAGS_PAR_EVEN:
338 case PAI_FLAGS_PAR_ODD:
343 warn("Serial link is not 8-bit clean:");
344 warn("All received characters had %s", s);
349 while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
353 for (; str_module_count > 0; str_module_count--) {
354 if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
356 warn("str_restore: couldn't push module %s: %m",
357 str_modules[str_module_count-1].modname);
359 SYSDEBUG(("str_restore: pushed module %s",
360 str_modules[str_module_count-1].modname));
367 * List of valid speeds.
370 int speed_int, speed_val;
442 * Translate from bits/second to a speed_t.
448 struct speed *speedp;
452 for (speedp = speeds; speedp->speed_int; speedp++)
453 if (bps == speedp->speed_int)
454 return speedp->speed_val;
455 warn("speed %d not supported", bps);
460 * Translate from a speed_t to bits/second.
466 struct speed *speedp;
470 for (speedp = speeds; speedp->speed_int; speedp++)
471 if (speed == speedp->speed_val)
472 return speedp->speed_int;
477 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
478 * at the requested speed, etc. If `local' is true, set CLOCAL
479 * regardless of whether the modem option was specified.
482 set_up_tty(fd, local)
489 if (tcgetattr(fd, &tios) < 0)
490 fatal("tcgetattr: %m");
496 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
498 bzero(&tiox, sizeof(tiox));
499 ioctl(fd, TCGETX, &tiox);
500 tiox.x_hflag = RTSXOFF;
501 ioctl(fd, TCSETX, &tiox);
502 tios.c_cflag &= ~(IXON | IXOFF);
503 } else if (crtscts < 0) {
504 bzero(&tiox, sizeof(tiox));
505 ioctl(fd, TCGETX, &tiox);
506 tiox.x_hflag &= ~RTSXOFF;
507 ioctl(fd, TCSETX, &tiox);
511 tios.c_cflag |= CS8 | CREAD | HUPCL;
513 tios.c_cflag |= CLOCAL;
514 tios.c_iflag = IGNBRK | IGNPAR;
518 tios.c_cc[VTIME] = 0;
521 tios.c_iflag |= IXON | IXOFF;
522 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
523 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
526 speed = translate_speed(inspeed);
528 cfsetospeed(&tios, speed);
529 cfsetispeed(&tios, speed);
531 speed = cfgetospeed(&tios);
533 * We can't proceed if the serial port speed is B0,
534 * since that implies that the serial port is disabled.
537 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
540 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
541 fatal("tcsetattr: %m");
543 baud_rate = inspeed = baud_rate_of(speed);
548 * restore_tty - restore the terminal to the saved settings.
555 if (!default_device) {
557 * Turn off echoing, because otherwise we can get into
558 * a loop with the tty and the modem echoing to each other.
559 * We presume we are the sole user of this tty device, so
560 * when we close it, it will revert to its defaults anyway.
562 inittermios.c_lflag &= ~(ECHO | ECHONL);
564 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
566 warn("tcsetattr: %m");
572 * setdtr - control the DTR line on the serial port.
573 * This is called from die(), so it shouldn't call die().
579 int modembits = TIOCM_DTR;
581 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
586 * output - Output PPP packet.
599 dbglog("sent %P", p, len);
602 str.buf = (caddr_t) p;
604 while (putmsg(ttyfd, NULL, &str, 0) < 0) {
605 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
607 error("Couldn't send packet: %m");
611 pfd.events = POLLOUT;
612 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
617 * wait_input - wait for input, for a length of time specified in *timo.
621 struct timeval *timo;
625 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
626 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
631 * add_fd - add an fd to the set that wait_input waits for.
638 for (n = 0; n < n_pollfds; ++n)
639 if (pollfds[n].fd == fd)
641 if (n_pollfds < MAX_POLLFDS) {
642 pollfds[n_pollfds].fd = fd;
643 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
646 error("Too many inputs!");
650 * remove_fd - remove an fd from the set that wait_input waits for.
657 for (n = 0; n < n_pollfds; ++n) {
658 if (pollfds[n].fd == fd) {
659 while (++n < n_pollfds)
660 pollfds[n-1] = pollfds[n];
669 * read_packet - get a PPP packet from the serial device.
675 struct strbuf str, ctl;
677 unsigned char ctlbuf[16];
679 str.maxlen = PPP_MTU + PPP_HDRLEN;
680 str.buf = (caddr_t) buf;
681 ctl.maxlen = sizeof(ctlbuf);
682 ctl.buf = (caddr_t) ctlbuf;
684 len = getmsg(ttyfd, &ctl, &str, &i);
686 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
692 SYSDEBUG(("getmsg returned 0x%x", len));
694 notice("got ctrl msg len %d %x %x\n", ctl.len, ctlbuf[0], ctlbuf[1]);
697 SYSDEBUG(("getmsg short return length %d", str.len));
706 * ppp_send_config - configure the transmit characteristics of
710 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
718 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
720 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
721 fatal("ioctl(SIOCSIFMTU): %m");
723 if(ioctl(ttyfd, SIOCSIFASYNCMAP, asyncmap) < 0)
724 fatal("ioctl(SIOCSIFASYNCMAP): %m");
727 if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0)
728 fatal("ioctl(SIOCSIFCOMPPROT): %m");
731 if(ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0)
732 fatal("ioctl(SIOCSIFCOMPAC): %m");
737 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
740 ppp_set_xaccm(unit, accm)
744 if (ioctl(ttyfd, SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
745 warn("ioctl(set extended ACCM): %m");
750 * ppp_recv_config - configure the receive-side characteristics of
754 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
761 if (ioctl(ttyfd, SIOCSIFMRU, mru) < 0) {
762 error("ioctl(SIOCSIFMRU): %m");
765 if (ioctl(ttyfd, SIOCSIFRASYNCMAP, (caddr_t) asyncmap) < 0) {
766 error("ioctl(SIOCSIFRASYNCMAP): %m");
769 c = 2 + (pcomp? 1: 0);
770 if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0) {
771 error("ioctl(SIOCSIFCOMPPROT): %m");
774 c = 2 + (accomp? 1: 0);
775 if (ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0) {
776 error("ioctl(SIOCSIFCOMPAC): %m");
781 * ccp_test - ask kernel whether a given compression method
782 * is acceptable for use.
785 ccp_test(unit, opt_ptr, opt_len, for_transmit)
786 int unit, opt_len, for_transmit;
789 struct ppp_option_data data;
791 if ((unsigned) opt_len > MAX_PPP_OPTION)
792 opt_len = MAX_PPP_OPTION;
793 data.length = opt_len;
794 data.transmit = for_transmit;
795 BCOPY(opt_ptr, data.opt_data, opt_len);
796 if (ioctl(ttyfd, SIOCSCOMPRESS, &data) >= 0)
798 return (errno == ENOSR)? 0: -1;
802 * ccp_flags_set - inform kernel about the current state of CCP.
805 ccp_flags_set(unit, isopen, isup)
806 int unit, isopen, isup;
810 x = (isopen? 1: 0) + (isup? 2: 0);
811 if (ioctl(ttyfd, SIOCSIFCOMP, x) < 0 && errno != ENOTTY)
812 error("ioctl (SIOCSIFCOMP): %m");
816 * ccp_fatal_error - returns 1 if decompression was disabled as a
817 * result of an error detected after decompression of a packet,
818 * 0 otherwise. This is necessary because of patent nonsense.
821 ccp_fatal_error(unit)
826 if (ioctl(ttyfd, SIOCGIFCOMP, &x) < 0) {
827 error("ioctl(SIOCGIFCOMP): %m");
830 return x & CCP_FATALERROR;
834 * sifvjcomp - config tcp header compression
837 sifvjcomp(u, vjcomp, cidcomp, maxcid)
838 int u, vjcomp, cidcomp, maxcid;
842 x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
843 if (ioctl(ttyfd, SIOCSIFVJCOMP, x) < 0) {
844 error("ioctl(SIOCSIFVJCOMP): %m");
851 * sifup - Config the interface up and enable IP packets to pass.
859 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
860 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
861 error("ioctl (SIOCGIFFLAGS): %m");
864 ifr.ifr_flags |= IFF_UP;
865 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
866 error("ioctl(SIOCSIFFLAGS): %m");
875 * sifnpmode - Set the mode for handling packets for a given NP.
878 sifnpmode(u, proto, mode)
885 npi.protocol = proto;
887 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
888 error("ioctl(set NP %d mode to %d): %m", proto, mode);
895 * sifdown - Config the interface down.
906 npi.protocol = PPP_IP;
907 npi.mode = NPMODE_ERROR;
908 ioctl(ttyfd, SIOCSETNPMODE, &npi);
909 /* ignore errors, because ttyfd might have been closed by now. */
911 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
912 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
913 error("ioctl (SIOCGIFFLAGS): %m");
916 ifr.ifr_flags &= ~IFF_UP;
917 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
918 error("ioctl(SIOCSIFFLAGS): %m");
927 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
929 #define SET_SA_FAMILY(addr, family) \
930 BZERO((char *) &(addr), sizeof(addr)); \
931 addr.sa_family = (family);
934 * sifaddr - Config the interface IP addresses and netmask.
945 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
946 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
948 info("Setting interface mask to %s\n", ip_ntoa(m));
949 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
950 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
951 error("ioctl(SIOCSIFNETMASK): %m");
956 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
957 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
958 error("ioctl(SIOCSIFADDR): %m");
962 SET_SA_FAMILY(ifr.ifr_dstaddr, AF_INET);
963 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
964 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
965 error("ioctl(SIOCSIFDSTADDR): %m");
969 /* XXX is this necessary? */
970 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
971 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
972 error("ioctl(SIOCSIFADDR): %m");
982 * cifaddr - Clear the interface IP addresses, and delete routes
983 * through the interface if possible.
993 BZERO(&rt, sizeof(rt));
994 SET_SA_FAMILY(rt.rt_dst, AF_INET);
995 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
996 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
997 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
998 rt.rt_flags = RTF_HOST;
999 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
1000 error("ioctl(SIOCDELRT): %m");
1007 * sifdefaultroute - assign a default route through the address given.
1010 sifdefaultroute(u, l, g)
1016 BZERO(&rt, sizeof(rt));
1017 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1018 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1019 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1020 rt.rt_flags = RTF_GATEWAY;
1021 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
1022 error("default route ioctl(SIOCADDRT): %m");
1025 default_route_gateway = g;
1030 * cifdefaultroute - delete a default route through the address given.
1033 cifdefaultroute(u, l, g)
1039 BZERO(&rt, sizeof(rt));
1040 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1041 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1042 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1043 rt.rt_flags = RTF_GATEWAY;
1044 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
1045 error("default route ioctl(SIOCDELRT): %m");
1048 default_route_gateway = 0;
1053 * sifproxyarp - Make a proxy ARP entry for the peer.
1056 sifproxyarp(unit, hisaddr)
1060 struct arpreq arpreq;
1062 BZERO(&arpreq, sizeof(arpreq));
1065 * Get the hardware address of an interface on the same subnet
1066 * as our local address.
1068 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1069 warn("Cannot determine ethernet address for proxy ARP");
1073 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1074 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1075 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1076 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1077 error("ioctl(SIOCSARP): %m");
1081 proxy_arp_addr = hisaddr;
1086 * cifproxyarp - Delete the proxy ARP entry for the peer.
1089 cifproxyarp(unit, hisaddr)
1093 struct arpreq arpreq;
1095 BZERO(&arpreq, sizeof(arpreq));
1096 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1097 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1098 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1099 error("ioctl(SIOCDARP): %m");
1107 * get_ether_addr - get the hardware address of an interface on the
1108 * the same subnet as ipaddr. Code borrowed from myetheraddr.c
1109 * in the cslip-2.6 distribution, which is subject to the following
1110 * copyright notice (which also applies to logwtmp below):
1112 * Copyright (c) 1990, 1992 The Regents of the University of California.
1113 * All rights reserved.
1115 * Redistribution and use in source and binary forms, with or without
1116 * modification, are permitted provided that: (1) source code distributions
1117 * retain the above copyright notice and this paragraph in its entirety, (2)
1118 * distributions including binary code include the above copyright notice and
1119 * this paragraph in its entirety in the documentation or other materials
1120 * provided with the distribution, and (3) all advertising materials mentioning
1121 * features or use of this software display the following acknowledgement:
1122 * ``This product includes software developed by the University of California,
1123 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
1124 * the University nor the names of its contributors may be used to endorse
1125 * or promote products derived from this software without specific prior
1126 * written permission.
1127 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
1128 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
1129 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1133 #include <arpa/inet.h>
1134 #include <netinet/in_var.h>
1135 #include <net/if_dl.h>
1137 /* Cast a struct sockaddr to a structaddr_in */
1138 #define SATOSIN(sa) ((struct sockaddr_in *)(sa))
1140 /* Determine if "bits" is set in "flag" */
1141 #define ALLSET(flag, bits) (((flag) & (bits)) == (bits))
1143 static struct nlist nl[] = {
1149 int kvm_read(int fd, off_t offset, void *buf, int nbytes)
1151 if (lseek(fd, offset, SEEK_SET) != offset) {
1152 error("lseek in kmem: %m");
1155 return(read(fd, buf, nbytes));
1159 get_ether_addr(ipaddr, hwaddr)
1161 struct sockaddr *hwaddr;
1164 register struct ifnet *ifp;
1165 register struct arpcom *ac;
1166 struct arpcom arpcom;
1167 struct in_addr *inp;
1168 register struct ifaddr *ifa;
1169 register struct in_ifaddr *in;
1172 struct in_ifaddr in;
1174 struct ifaddr *ifap;
1175 struct sockaddr ifaddrsaddr;
1176 struct sockaddr_in ifmasksaddr;
1177 struct sockaddr_in *ifinetptr;
1178 struct sockaddr_dl *iflinkptr;
1179 u_long addr, mask, ifip;
1182 /* Open kernel memory for reading */
1183 if ((kd = open("/dev/kmem", O_RDONLY)) < 0) {
1184 error("/dev/kmem: %m");
1188 /* Fetch namelist */
1189 if (nlist("/unix", nl) != 0) {
1190 error("nlist(): %m");
1195 ifp = &arpcom.ac_if;
1199 if (kvm_read(kd, nl[N_IFNET].n_value, (char *)&addr, sizeof(addr))
1201 error("error reading ifnet addr");
1204 for ( ; addr && !found; addr = (u_long)ifp->if_next) {
1205 if (kvm_read(kd, addr, (char *)ac, sizeof(*ac)) != sizeof(*ac)) {
1206 error("error reading ifnet");
1210 /* Only look at configured, broadcast interfaces */
1211 if (!ALLSET(ifp->if_flags, IFF_UP | IFF_BROADCAST))
1213 /* This probably can't happen... */
1214 if (ifp->if_addrlist == 0)
1217 /* Get interface ip address */
1218 for (ifap = ifp->if_addrlist; ifap; ifap=ifaddr.ifa.ifa_next) {
1219 if (kvm_read(kd, (u_long)ifap, (char *)&ifaddr,
1220 sizeof(ifaddr)) != sizeof(ifaddr)) {
1221 error("error reading ifaddr");
1224 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_addr, &ifaddrsaddr,
1225 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1226 error("error reading ifaddrsaddr");
1229 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
1230 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1231 error("error reading ifmasksaddr");
1234 /* Check if this interface on the right subnet */
1235 switch (ifaddrsaddr.sa_family) {
1237 hwaddr->sa_family = AF_UNSPEC;
1238 iflinkptr = (struct sockaddr_dl *) &ifaddrsaddr;
1239 bcopy(LLADDR(iflinkptr),hwaddr->sa_data,iflinkptr->sdl_alen);
1242 ifinetptr= (struct sockaddr_in *) &ifaddrsaddr;
1243 ifip = ifinetptr->sin_addr.s_addr;
1244 if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
1245 sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
1246 error("error reading ifmasksaddr");
1249 mask = ifmasksaddr.sin_addr.s_addr;
1250 if ((ipaddr & mask) == (ifip & mask))
1263 * Return user specified netmask, modified by any mask we might determine
1264 * for address `addr' (in network byte order).
1265 * Here we scan through the system's list of interfaces, looking for
1266 * any non-point-to-point interfaces which might appear to be on the same
1267 * network as `addr'. If we find any, we OR in their netmask to the
1268 * user-specified netmask.
1276 u_int32_t mask, nmask, ina;
1277 struct ifreq *ifr, *ifend, ifreq;
1279 struct ifreq ifs[MAX_IFS];
1282 if (IN_CLASSA(addr)) /* determine network mask for address class */
1283 nmask = IN_CLASSA_NET;
1284 else if (IN_CLASSB(addr))
1285 nmask = IN_CLASSB_NET;
1287 nmask = IN_CLASSC_NET;
1288 /* class D nets are disallowed by bad_ip_adrs */
1289 mask = netmask | htonl(nmask);
1292 * Scan through the system's network interfaces.
1294 ifc.ifc_len = sizeof(ifs);
1296 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1297 warn("ioctl(SIOCGIFCONF): %m");
1300 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1301 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1303 * Check the interface's internet address.
1305 if (ifr->ifr_addr.sa_family != AF_INET)
1307 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1308 if ((ntohl(ina) & nmask) != (addr & nmask))
1311 * Check that the interface is up, and not point-to-point or loopback.
1313 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1314 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1316 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1320 * Get its netmask and OR it into our mask.
1322 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1324 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1330 #define WTMPFILE "/var/adm/wtmp"
1333 logwtmp(line, name, host)
1334 const char *line, *name, *host;
1340 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1342 if (!fstat(fd, &buf)) {
1343 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1344 strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1345 strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1346 (void)time(&ut.ut_time);
1347 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1348 (void)ftruncate(fd, buf.st_size);
1354 * Use the hostid as part of the random number seed.
1363 * Code for locking/unlocking the serial device.
1366 static char *devlocked = (char *) 0;
1368 int lock(char *device)
1373 if (devname = strrchr(device,'/'))
1378 if ((rc = ttylock(devname)) == 0) {
1379 devlocked = strdup(devname);
1381 devlocked = (char *) 0;
1391 rc = ttyunlock(devlocked);
1393 devlocked = (char *) 0;