2 * sys-str.c - System-dependent procedures for setting up
3 * PPP interfaces on systems which use the STREAMS ppp interface.
5 * Copyright (c) 1989 Carnegie Mellon University.
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 static char rcsid[] = "$Id: sys-str.c,v 1.21 1995/06/12 12:18:04 paulus Exp $";
39 #include <sys/types.h>
40 #include <sys/socket.h>
41 #include <sys/sockio.h>
43 #include <sys/stream.h>
44 #include <sys/stropts.h>
46 #include <arpa/inet.h>
48 #include <net/ppp_defs.h>
49 #include <net/ppp_str.h>
50 #include <net/route.h>
51 #include <net/if_arp.h>
52 #include <netinet/in.h>
57 #define ifr_mtu ifr_metric
60 #define MAXMODULES 10 /* max number of module names to save */
61 static struct modlist {
62 char modname[FMNAMESZ+1];
63 } str_modules[MAXMODULES];
64 static int str_module_count = 0;
65 static int pushed_ppp;
66 static int closed_stdio;
68 static int restore_term; /* 1 => we've munged the terminal */
69 static struct termios inittermios; /* Initial TTY termios */
71 int sockfd; /* socket for doing interface ioctls */
72 static char *lock_file; /* lock file created for serial port */
75 * sys_init - System-dependent initialization.
80 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
81 setlogmask(LOG_UPTO(LOG_INFO));
83 setlogmask(LOG_UPTO(LOG_DEBUG));
85 /* Get an internet socket for doing socket ioctl's on. */
86 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
87 syslog(LOG_ERR, "Couldn't create IP socket: %m");
93 * note_debug_level - note a change in the debug level.
99 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
100 setlogmask(LOG_UPTO(LOG_DEBUG));
102 setlogmask(LOG_UPTO(LOG_WARNING));
107 * daemon - Detach us from the terminal session.
110 daemon(nochdir, noclose)
111 int nochdir, noclose;
115 if ((pid = fork()) < 0)
118 exit(0); /* parent dies */
123 fclose(stdin); /* don't need stdin, stdout, stderr */
132 * ppp_available - check if this kernel supports PPP.
139 fd = open("/dev/tty", O_RDONLY, 0);
141 return 1; /* can't find out - assume we have ppp */
142 ret = ioctl(fd, I_FIND, "pppasync") >= 0;
149 * establish_ppp - Turn the serial port into a ppp interface.
154 /* go through and save the name of all the modules, then pop em */
156 if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
157 ioctl(fd, I_POP, 0) < 0)
159 MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
160 str_modules[str_module_count].modname));
164 /* now push the async/fcs module */
165 if (ioctl(fd, I_PUSH, "pppasync") < 0) {
166 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
169 /* push the compress module */
170 if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
171 syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
173 /* finally, push the ppp_if module that actually handles the */
174 /* network interface */
175 if (ioctl(fd, I_PUSH, "pppif") < 0) {
176 syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
180 /* read mode, message non-discard mode */
181 if (ioctl(fd, I_SRDOPT, RMSGN) < 0) {
182 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
186 * Find out which interface we were given.
187 * (ppp_if handles this ioctl)
189 if (ioctl(fd, SIOCGETU, &ifunit) < 0) {
190 syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
194 /* Set debug flags in driver */
195 if (ioctl(fd, SIOCSIFDEBUG, &kdebugflag) < 0) {
196 syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
199 /* close stdin, stdout, stderr if they might refer to the device */
200 if (default_device && !closed_stdio) {
203 for (i = 0; i <= 2; ++i)
204 if (i != fd && i != sockfd)
211 * disestablish_ppp - Restore the serial port to normal operation.
212 * It attempts to reconstruct the stream with the previously popped
213 * modules. This shouldn't call die() because it's called from die().
222 /* we can't push or pop modules after the stream has hung up */
223 str_module_count = 0;
224 restore_term = 0; /* nor can we fix up terminal settings */
230 * Check whether the link seems not to be 8-bit clean.
232 if (ioctl(fd, SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
234 switch (~flags & PAI_FLAGS_HIBITS) {
236 s = "bit 7 set to 1";
239 s = "bit 7 set to 0";
241 case PAI_FLAGS_PAR_EVEN:
244 case PAI_FLAGS_PAR_ODD:
249 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
250 syslog(LOG_WARNING, "All received characters had %s", s);
254 while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
257 for (; str_module_count > 0; str_module_count--) {
258 if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
260 syslog(LOG_WARNING, "Couldn't restore module %s: %m",
261 str_modules[str_module_count-1].modname);
263 MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
264 str_modules[str_module_count-1].modname));
273 * List of valid speeds.
276 int speed_int, speed_val;
348 * Translate from bits/second to a speed_t.
354 struct speed *speedp;
358 for (speedp = speeds; speedp->speed_int; speedp++)
359 if (bps == speedp->speed_int)
360 return speedp->speed_val;
361 syslog(LOG_WARNING, "speed %d not supported", bps);
366 * Translate from a speed_t to bits/second.
372 struct speed *speedp;
376 for (speedp = speeds; speedp->speed_int; speedp++)
377 if (speed == speedp->speed_val)
378 return speedp->speed_int;
383 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
384 * at the requested speed, etc. If `local' is true, set CLOCAL
385 * regardless of whether the modem option was specified.
387 set_up_tty(fd, local)
393 if (tcgetattr(fd, &tios) < 0) {
394 syslog(LOG_ERR, "tcgetattr: %m");
401 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
403 tios.c_cflag |= CRTSCTS;
404 else if (crtscts < 0)
405 tios.c_cflag &= ~CRTSCTS;
407 tios.c_cflag |= CS8 | CREAD | HUPCL;
409 tios.c_cflag |= CLOCAL;
410 tios.c_iflag = IGNBRK | IGNPAR;
414 tios.c_cc[VTIME] = 0;
417 tios.c_iflag |= IXOFF;
418 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
419 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
422 speed = translate_speed(inspeed);
424 cfsetospeed(&tios, speed);
425 cfsetispeed(&tios, speed);
427 speed = cfgetospeed(&tios);
429 * We can't proceed if the serial port speed is B0,
430 * since that implies that the serial port is disabled.
433 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
439 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
440 syslog(LOG_ERR, "tcsetattr: %m");
444 baud_rate = inspeed = baud_rate_of(speed);
449 * restore_tty - restore the terminal to the saved settings.
455 if (!default_device) {
457 * Turn off echoing, because otherwise we can get into
458 * a loop with the tty and the modem echoing to each other.
459 * We presume we are the sole user of this tty device, so
460 * when we close it, it will revert to its defaults anyway.
462 inittermios.c_lflag &= ~(ECHO | ECHONL);
464 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
466 syslog(LOG_WARNING, "tcsetattr: %m");
472 * setdtr - control the DTR line on the serial port.
473 * This is called from die(), so it shouldn't call die().
478 int modembits = TIOCM_DTR;
480 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
485 * output - Output PPP packet.
496 MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
498 log_packet(p, len, "sent ");
501 str.buf = (caddr_t) p;
502 if (putmsg(fd, NULL, &str, 0) < 0) {
503 if (errno != ENXIO) {
504 syslog(LOG_ERR, "putmsg: %m");
511 * wait_input - wait for input, for a length of time specified in *timo.
514 struct timeval *timo;
519 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
521 pfd.events = POLLIN | POLLPRI | POLLHUP;
522 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
523 syslog(LOG_ERR, "poll: %m");
529 * read_packet - get a PPP packet from the serial device.
535 struct strbuf str, ctl;
537 unsigned char ctlbuf[16];
539 str.maxlen = PPP_MTU + PPP_HDRLEN;
540 str.buf = (caddr_t) buf;
541 ctl.maxlen = sizeof(ctlbuf);
542 ctl.buf = (caddr_t) ctlbuf;
544 len = getmsg(fd, &ctl, &str, &i);
546 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
549 syslog(LOG_ERR, "getmsg(fd) %m");
553 MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
555 syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
556 ctlbuf[0], ctlbuf[1]);
559 MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
568 * ppp_send_config - configure the transmit characteristics of
572 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
580 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
582 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
583 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
587 if(ioctl(fd, SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
588 syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
593 if(ioctl(fd, SIOCSIFCOMPPROT, &c) < 0) {
594 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
599 if(ioctl(fd, SIOCSIFCOMPAC, &c) < 0) {
600 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
607 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
610 ppp_set_xaccm(unit, accm)
614 if (ioctl(fd, SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
615 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
620 * ppp_recv_config - configure the receive-side characteristics of
624 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
631 if (ioctl(fd, SIOCSIFMRU, &mru) < 0) {
632 syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
635 if (ioctl(fd, SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
636 syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
639 c = 2 + (pcomp? 1: 0);
640 if(ioctl(fd, SIOCSIFCOMPPROT, &c) < 0) {
641 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
644 c = 2 + (accomp? 1: 0);
645 if (ioctl(fd, SIOCSIFCOMPAC, &c) < 0) {
646 syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
651 * ccp_test - ask kernel whether a given compression method
652 * is acceptable for use.
654 ccp_test(unit, opt_ptr, opt_len, for_transmit)
655 int unit, opt_len, for_transmit;
658 struct ppp_option_data data;
660 if ((unsigned) opt_len > MAX_PPP_OPTION)
661 opt_len = MAX_PPP_OPTION;
662 data.length = opt_len;
663 data.transmit = for_transmit;
664 BCOPY(opt_ptr, data.opt_data, opt_len);
665 return ioctl(fd, SIOCSCOMPRESS, (caddr_t) &data) >= 0;
669 * ccp_flags_set - inform kernel about the current state of CCP.
672 ccp_flags_set(unit, isopen, isup)
673 int unit, isopen, isup;
677 x = (isopen? 1: 0) + (isup? 2: 0);
678 if (ioctl(fd, SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY)
679 syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
683 * ccp_fatal_error - returns 1 if decompression was disabled as a
684 * result of an error detected after decompression of a packet,
685 * 0 otherwise. This is necessary because of patent nonsense.
688 ccp_fatal_error(unit)
693 if (ioctl(fd, SIOCGIFCOMP, (caddr_t) &x) < 0) {
694 syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
697 return x & CCP_FATALERROR;
701 * sifvjcomp - config tcp header compression
704 sifvjcomp(u, vjcomp, cidcomp, maxcid)
705 int u, vjcomp, cidcomp, maxcid;
709 x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
710 if (ioctl(fd, SIOCSIFVJCOMP, (caddr_t) &x) < 0) {
711 syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
718 * sifup - Config the interface up and enable IP packets to pass.
727 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
728 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
729 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
732 ifr.ifr_flags |= IFF_UP;
733 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
734 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
737 npi.protocol = PPP_IP;
738 npi.mode = NPMODE_PASS;
739 if (ioctl(fd, SIOCSETNPMODE, &npi) < 0) {
740 if (errno != ENOTTY) {
741 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
749 * sifdown - Config the interface down.
760 npi.protocol = PPP_IP;
761 npi.mode = NPMODE_ERROR;
762 if (ioctl(fd, SIOCSETNPMODE, (caddr_t) &npi) < 0) {
763 if (errno != ENOTTY) {
764 syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
769 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
770 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
771 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
774 ifr.ifr_flags &= ~IFF_UP;
775 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
776 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
784 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
786 #define SET_SA_FAMILY(addr, family) \
787 BZERO((char *) &(addr), sizeof(addr)); \
788 addr.sa_family = (family);
791 * sifaddr - Config the interface IP addresses and netmask.
802 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
803 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
804 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
805 if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
806 syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
809 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
810 if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
811 syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
815 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
816 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
817 if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
818 syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
826 * cifaddr - Clear the interface IP addresses, and delete routes
827 * through the interface if possible.
836 SET_SA_FAMILY(rt.rt_dst, AF_INET);
837 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
838 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
839 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
840 rt.rt_flags = RTF_HOST;
841 if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
842 syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
849 * sifdefaultroute - assign a default route through the address given.
852 sifdefaultroute(u, g)
858 SET_SA_FAMILY(rt.rt_dst, AF_INET);
859 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
860 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
861 rt.rt_flags = RTF_GATEWAY;
862 if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
863 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
870 * cifdefaultroute - delete a default route through the address given.
873 cifdefaultroute(u, g)
879 SET_SA_FAMILY(rt.rt_dst, AF_INET);
880 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
881 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
882 rt.rt_flags = RTF_GATEWAY;
883 if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
884 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
891 * sifproxyarp - Make a proxy ARP entry for the peer.
894 sifproxyarp(unit, hisaddr)
898 struct arpreq arpreq;
900 BZERO(&arpreq, sizeof(arpreq));
903 * Get the hardware address of an interface on the same subnet
904 * as our local address.
906 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
907 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
911 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
912 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
913 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
914 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
915 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
923 * cifproxyarp - Delete the proxy ARP entry for the peer.
926 cifproxyarp(unit, hisaddr)
930 struct arpreq arpreq;
932 BZERO(&arpreq, sizeof(arpreq));
933 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
934 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
935 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
936 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
943 * get_ether_addr - get the hardware address of an interface on the
944 * the same subnet as ipaddr. Code borrowed from myetheraddr.c
945 * in the cslip-2.6 distribution, which is subject to the following
946 * copyright notice (which also applies to logwtmp below):
948 * Copyright (c) 1990, 1992 The Regents of the University of California.
949 * All rights reserved.
951 * Redistribution and use in source and binary forms, with or without
952 * modification, are permitted provided that: (1) source code distributions
953 * retain the above copyright notice and this paragraph in its entirety, (2)
954 * distributions including binary code include the above copyright notice and
955 * this paragraph in its entirety in the documentation or other materials
956 * provided with the distribution, and (3) all advertising materials mentioning
957 * features or use of this software display the following acknowledgement:
958 * ``This product includes software developed by the University of California,
959 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
960 * the University nor the names of its contributors may be used to endorse
961 * or promote products derived from this software without specific prior
962 * written permission.
963 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
964 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
965 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
972 /* XXX SunOS 4.1 defines this and 3.5 doesn't... */
978 #include <netinet/in_var.h>
980 #include <netinet/if_ether.h>
982 /* Cast a struct sockaddr to a structaddr_in */
983 #define SATOSIN(sa) ((struct sockaddr_in *)(sa))
985 /* Determine if "bits" is set in "flag" */
986 #define ALLSET(flag, bits) (((flag) & (bits)) == (bits))
988 static struct nlist nl[] = {
997 get_ether_addr(ipaddr, hwaddr)
999 struct sockaddr *hwaddr;
1002 register struct ifnet *ifp;
1003 register struct arpcom *ac;
1004 struct arpcom arpcom;
1005 struct in_addr *inp;
1007 register struct ifaddr *ifa;
1008 register struct in_ifaddr *in;
1011 struct in_ifaddr in;
1014 u_int32_t addr, mask;
1016 /* Open kernel memory for reading */
1017 kd = kvm_open(0, 0, 0, O_RDONLY, NULL);
1019 syslog(LOG_ERR, "kvm_open: %m");
1023 /* Fetch namelist */
1024 if (kvm_nlist(kd, nl) != 0) {
1025 syslog(LOG_ERR, "kvm_nlist failed");
1030 ifp = &arpcom.ac_if;
1036 if (kvm_read(kd, nl[N_IFNET].n_value, (char *)&addr, sizeof(addr))
1038 syslog(LOG_ERR, "error reading ifnet addr");
1041 for ( ; addr; addr = (u_int32_t)ifp->if_next) {
1042 if (kvm_read(kd, addr, (char *)ac, sizeof(*ac)) != sizeof(*ac)) {
1043 syslog(LOG_ERR, "error reading ifnet");
1047 /* Only look at configured, broadcast interfaces */
1048 if (!ALLSET(ifp->if_flags, IFF_UP | IFF_BROADCAST))
1051 /* This probably can't happen... */
1052 if (ifp->if_addrlist == 0)
1056 /* Get interface ip address */
1058 if (kvm_read(kd, (u_int32_t)ifp->if_addrlist, (char *)&ifaddr,
1059 sizeof(ifaddr)) != sizeof(ifaddr)) {
1060 syslog(LOG_ERR, "error reading ifaddr");
1063 inp = &SATOSIN(&ifa->ifa_addr)->sin_addr;
1065 inp = &SATOSIN(&ifp->if_addr)->sin_addr;
1068 /* Check if this interface on the right subnet */
1070 mask = in->ia_subnetmask;
1072 mask = ifp->if_subnetmask;
1074 if ((ipaddr & mask) != (inp->s_addr & mask))
1077 /* Copy out the local ethernet address */
1078 hwaddr->sa_family = AF_UNSPEC;
1079 BCOPY((caddr_t) &arpcom.ac_enaddr, hwaddr->sa_data,
1080 sizeof(arpcom.ac_enaddr));
1081 return 1; /* success! */
1084 /* couldn't find one */
1088 #define WTMPFILE "/usr/adm/wtmp"
1091 logwtmp(line, name, host)
1092 char *line, *name, *host;
1098 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1100 if (!fstat(fd, &buf)) {
1101 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1102 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1103 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1104 (void)time(&ut.ut_time);
1105 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1106 (void)ftruncate(fd, buf.st_size);
1112 * Return user specified netmask, modified by any mask we might determine
1113 * for address `addr' (in network byte order).
1114 * Here we scan through the system's list of interfaces, looking for
1115 * any non-point-to-point interfaces which might appear to be on the same
1116 * network as `addr'. If we find any, we OR in their netmask to the
1117 * user-specified netmask.
1125 u_int32_t mask, nmask, ina;
1126 struct ifreq *ifr, *ifend, ifreq;
1128 struct ifreq ifs[MAX_IFS];
1131 if (IN_CLASSA(addr)) /* determine network mask for address class */
1132 nmask = IN_CLASSA_NET;
1133 else if (IN_CLASSB(addr))
1134 nmask = IN_CLASSB_NET;
1136 nmask = IN_CLASSC_NET;
1137 /* class D nets are disallowed by bad_ip_adrs */
1138 mask = netmask | htonl(nmask);
1141 * Scan through the system's network interfaces.
1143 ifc.ifc_len = sizeof(ifs);
1145 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1146 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1149 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1150 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1152 * Check the interface's internet address.
1154 if (ifr->ifr_addr.sa_family != AF_INET)
1156 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1157 if ((ntohl(ina) & nmask) != (addr & nmask))
1160 * Check that the interface is up, and not point-to-point or loopback.
1162 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1163 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1165 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1169 * Get its netmask and OR it into our mask.
1171 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1173 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1180 * Code for locking/unlocking the serial device.
1181 * This code is derived from chat.c.
1184 #if defined(SUNOS) && SUNOS >= 41 && !defined(HDB)
1191 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1193 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1195 #endif /* LOCK_DIR */
1198 * lock - create a lock file for the named device.
1204 char hdb_lock_buffer[12];
1208 if ((p = strrchr(dev, '/')) != NULL)
1210 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1211 if (lock_file == NULL)
1212 novm("lock file name");
1213 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1215 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1217 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1218 /* Read the lock file to find out who has the device locked */
1220 n = read(fd, hdb_lock_buffer, 11);
1222 hdb_lock_buffer[n] = 0;
1223 pid = atoi(hdb_lock_buffer);
1226 n = read(fd, &pid, sizeof(pid));
1229 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1232 if (kill(pid, 0) == -1 && errno == ESRCH) {
1233 /* pid no longer exists - remove the lock file */
1234 if (unlink(lock_file) == 0) {
1236 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1240 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1243 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1248 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1255 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1256 write(fd, hdb_lock_buffer, 11);
1259 write(fd, &pid, sizeof pid);
1267 * unlock - remove our lockfile
1280 * SunOS doesn't have strtoul :-(
1283 strtoul(str, ptr, base)
1287 return (unsigned long) strtol(str, ptr, base);