2 * System-dependent procedures for pppd under Solaris 2.
4 * Copyright (c) 1994 The Australian National University.
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies. This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
28 #define RCSID "$Id: sys-svr4.c,v 1.33 1999/08/13 06:46:20 paulus Exp $"
40 #include <sys/termiox.h>
44 #include <sys/types.h>
45 #include <sys/ioccom.h>
46 #include <sys/stream.h>
47 #include <sys/stropts.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/sysmacros.h>
51 #include <sys/systeminfo.h>
54 #include <sys/mkdev.h>
56 #include <net/if_arp.h>
57 #include <net/route.h>
58 #include <net/ppp_defs.h>
59 #include <net/pppio.h>
60 #include <netinet/in.h>
62 #include <sys/tihdr.h>
63 #include <sys/tiuser.h>
64 #include <inet/common.h>
65 #include <inet/mib2.h>
70 static const char rcsid[] = RCSID;
73 static int fdmuxid = -1;
75 static int ipmuxid = -1;
77 static int restore_term;
78 static struct termios inittermios;
80 static struct termiox inittermiox;
81 static int termiox_ok;
83 static struct winsize wsinfo; /* Initial window size info */
84 static pid_t tty_sid; /* original session ID for terminal */
86 extern u_char inpacket_buf[]; /* borrowed from main.c */
88 #define MAX_POLLFDS 32
89 static struct pollfd pollfds[MAX_POLLFDS];
92 static int link_mtu, link_mru;
95 static int tty_nmodules;
96 static char tty_modules[NMODULES][FMNAMESZ+1];
97 static int tty_npushed;
99 static int if_is_up; /* Interface has been marked up */
100 static u_int32_t remote_addr; /* IP address of peer */
101 static u_int32_t default_route_gateway; /* Gateway for default route added */
102 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
104 /* Prototypes for procedures local to this file. */
105 static int translate_speed __P((int));
106 static int baud_rate_of __P((int));
107 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
108 static int get_hw_addr __P((char *, u_int32_t, struct sockaddr *));
109 static int dlpi_attach __P((int, int));
110 static int dlpi_info_req __P((int));
111 static int dlpi_get_reply __P((int, union DL_primitives *, int, int));
112 static int strioctl __P((int, int, void *, int, int));
116 * sys_init - System-dependent initialization.
125 union DL_primitives prim;
130 ipfd = open("/dev/ip", O_RDWR, 0);
132 fatal("Couldn't open IP device: %m");
134 if (default_device && !notty)
135 tty_sid = getsid((pid_t)0);
137 pppfd = open("/dev/ppp", O_RDWR | O_NONBLOCK, 0);
139 fatal("Can't open /dev/ppp: %m");
140 if (kdebugflag & 1) {
141 x = PPPDBG_LOG + PPPDBG_DRIVER;
142 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
145 /* Assign a new PPA and get its unit number. */
146 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
147 fatal("Can't create new PPP interface: %m");
150 * Open the ppp device again and link it under the ip multiplexor.
151 * IP will assign a unit number which hopefully is the same as ifunit.
152 * I don't know any way to be certain they will be the same. :-(
154 ifd = open("/dev/ppp", O_RDWR, 0);
156 fatal("Can't open /dev/ppp (2): %m");
157 if (kdebugflag & 1) {
158 x = PPPDBG_LOG + PPPDBG_DRIVER;
159 strioctl(ifd, PPPIO_DEBUG, &x, sizeof(int), 0);
162 if (ioctl(ifd, I_PUSH, "ip") < 0) {
164 fatal("Can't push IP module: %m");
167 if (dlpi_attach(ifd, ifunit) < 0 ||
168 dlpi_get_reply(ifd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0) {
170 fatal("Can't attach to ppp%d: %m", ifunit);
173 ipmuxid = ioctl(ipfd, I_LINK, ifd);
176 fatal("Can't link PPP device to IP: %m");
179 /* Set the interface name for the link. */
180 slprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "ppp%d", ifunit);
181 ifr.ifr_metric = ipmuxid;
182 if (strioctl(ipfd, SIOCSIFNAME, (char *)&ifr, sizeof ifr, 0) < 0)
183 fatal("Can't set interface name %s: %m", ifr.ifr_name);
190 * sys_cleanup - restore any system state we modified before exiting:
191 * mark the interface down, delete default route and/or proxy arp entry.
192 * This should call die() because it's called from die().
201 if (default_route_gateway)
202 cifdefaultroute(0, default_route_gateway, default_route_gateway);
204 cifproxyarp(0, proxy_arp_addr);
208 * sys_close - Clean up in a child process before execing.
219 * sys_check_options - check the options that the user specified
229 * daemon - Detach us from controlling terminal session.
232 daemon(nochdir, noclose)
233 int nochdir, noclose;
237 if ((pid = fork()) < 0)
240 exit(0); /* parent dies */
245 fclose(stdin); /* don't need stdin, stdout, stderr */
254 * ppp_available - check whether the system has any ppp interfaces
261 return stat("/dev/ppp", &buf) >= 0;
265 * establish_ppp - Turn the serial port into a ppp interface.
273 /* Pop any existing modules off the tty stream. */
275 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
276 || strcmp(tty_modules[i], "ptem") == 0
277 || ioctl(fd, I_POP, 0) < 0)
281 /* Push the async hdlc module and the compressor module. */
285 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
286 error("Couldn't push PPP Async HDLC module: %m");
291 if (kdebugflag & 4) {
292 i = PPPDBG_LOG + PPPDBG_AHDLC;
293 strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
295 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
296 error("Couldn't push PPP compression module: %m");
299 if (kdebugflag & 2) {
300 i = PPPDBG_LOG + PPPDBG_COMP;
301 strioctl(pppfd, PPPIO_DEBUG, &i, sizeof(int), 0);
304 /* Link the serial port under the PPP multiplexor. */
305 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
306 error("Can't link tty to PPP mux: %m");
314 * restore_loop - reattach the ppp unit to the loopback.
315 * This doesn't need to do anything because disestablish_ppp does it.
323 * disestablish_ppp - Restore the serial port to normal operation.
324 * It attempts to reconstruct the stream with the previously popped
325 * modules. This shouldn't call die() because it's called from die().
334 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
336 error("Can't unlink tty from PPP mux: %m");
341 while (tty_npushed > 0 && ioctl(fd, I_POP, 0) >= 0)
343 for (i = tty_nmodules - 1; i >= 0; --i)
344 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
345 error("Couldn't restore tty module %s: %m",
348 if (hungup && default_device && tty_sid > 0) {
350 * If we have received a hangup, we need to send a SIGHUP
351 * to the terminal's controlling process. The reason is
352 * that the original stream head for the terminal hasn't
353 * seen the M_HANGUP message (it went up through the ppp
354 * driver to the stream head for our fd to /dev/ppp).
356 kill(tty_sid, SIGHUP);
362 * Check whether the link seems not to be 8-bit clean.
370 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
375 s = "bit 7 set to 1";
378 s = "bit 7 set to 0";
388 warn("Serial link is not 8-bit clean:");
389 warn("All received characters had %s", s);
394 * List of valid speeds.
397 int speed_int, speed_val;
472 * Translate from bits/second to a speed_t.
478 struct speed *speedp;
482 for (speedp = speeds; speedp->speed_int; speedp++)
483 if (bps == speedp->speed_int)
484 return speedp->speed_val;
485 warn("speed %d not supported", bps);
490 * Translate from a speed_t to bits/second.
496 struct speed *speedp;
500 for (speedp = speeds; speedp->speed_int; speedp++)
501 if (speed == speedp->speed_val)
502 return speedp->speed_int;
507 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
508 * at the requested speed, etc. If `local' is true, set CLOCAL
509 * regardless of whether the modem option was specified.
512 set_up_tty(fd, local)
517 #if !defined (CRTSCTS)
521 if (!sync_serial && tcgetattr(fd, &tios) < 0)
522 fatal("tcgetattr: %m");
526 if (ioctl (fd, TCGETX, &tiox) < 0) {
538 ioctl(fd, TIOCGWINSZ, &wsinfo);
541 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
544 tios.c_cflag |= CRTSCTS;
545 else if (crtscts < 0)
546 tios.c_cflag &= ~CRTSCTS;
548 if (crtscts != 0 && !termiox_ok) {
549 error("Can't set RTS/CTS flow control");
550 } else if (crtscts > 0) {
551 tiox.x_hflag |= RTSXOFF|CTSXON;
552 } else if (crtscts < 0) {
553 tiox.x_hflag &= ~(RTSXOFF|CTSXON);
557 tios.c_cflag |= CS8 | CREAD | HUPCL;
559 tios.c_cflag |= CLOCAL;
560 tios.c_iflag = IGNBRK | IGNPAR;
564 tios.c_cc[VTIME] = 0;
567 tios.c_iflag |= IXON | IXOFF;
568 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
569 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
572 speed = translate_speed(inspeed);
574 cfsetospeed(&tios, speed);
575 cfsetispeed(&tios, speed);
577 speed = cfgetospeed(&tios);
579 * We can't proceed if the serial port speed is 0,
580 * since that implies that the serial port is disabled.
583 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
586 if (!sync_serial && tcsetattr(fd, TCSAFLUSH, &tios) < 0)
587 fatal("tcsetattr: %m");
590 if (termiox_ok && ioctl (fd, TCSETXF, &tiox) < 0){
591 error("TCSETXF: %m");
595 baud_rate = inspeed = baud_rate_of(speed);
600 * restore_tty - restore the terminal to the saved settings.
607 if (!default_device) {
609 * Turn off echoing, because otherwise we can get into
610 * a loop with the tty and the modem echoing to each other.
611 * We presume we are the sole user of this tty device, so
612 * when we close it, it will revert to its defaults anyway.
614 inittermios.c_lflag &= ~(ECHO | ECHONL);
616 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
617 if (!hungup && errno != ENXIO)
618 warn("tcsetattr: %m");
620 if (ioctl (fd, TCSETXF, &inittermiox) < 0){
621 if (!hungup && errno != ENXIO)
622 error("TCSETXF: %m");
625 ioctl(fd, TIOCSWINSZ, &wsinfo);
631 * setdtr - control the DTR line on the serial port.
632 * This is called from die(), so it shouldn't call die().
638 int modembits = TIOCM_DTR;
640 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
644 * open_loopback - open the device we use for getting packets
645 * in demand mode. Under Solaris 2, we use our existing fd
655 * output - Output PPP packet.
668 dbglog("sent %P", p, len);
671 data.buf = (caddr_t) p;
673 while (putmsg(pppfd, NULL, &data, 0) < 0) {
674 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
676 error("Couldn't send packet: %m");
680 pfd.events = POLLOUT;
681 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
687 * wait_input - wait until there is data available,
688 * for the length of time specified by *timo (indefinite
693 struct timeval *timo;
697 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
698 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
703 * add_fd - add an fd to the set that wait_input waits for.
710 for (n = 0; n < n_pollfds; ++n)
711 if (pollfds[n].fd == fd)
713 if (n_pollfds < MAX_POLLFDS) {
714 pollfds[n_pollfds].fd = fd;
715 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
718 error("Too many inputs!");
722 * remove_fd - remove an fd from the set that wait_input waits for.
729 for (n = 0; n < n_pollfds; ++n) {
730 if (pollfds[n].fd == fd) {
731 while (++n < n_pollfds)
732 pollfds[n-1] = pollfds[n];
741 * wait_loop_output - wait until there is data available on the
742 * loopback, for the length of time specified by *timo (indefinite
746 wait_loop_output(timo)
747 struct timeval *timo;
753 * wait_time - wait for a given length of time or until a
754 * signal is received.
758 struct timeval *timo;
762 n = select(0, NULL, NULL, NULL, timo);
763 if (n < 0 && errno != EINTR)
770 * read_packet - get a PPP packet from the serial device.
776 struct strbuf ctrl, data;
778 unsigned char ctrlbuf[sizeof(union DL_primitives) + 64];
781 data.maxlen = PPP_MRU + PPP_HDRLEN;
782 data.buf = (caddr_t) buf;
783 ctrl.maxlen = sizeof(ctrlbuf);
784 ctrl.buf = (caddr_t) ctrlbuf;
786 len = getmsg(pppfd, &ctrl, &data, &flags);
788 if (errno == EAGAIN || errno == EINTR)
790 fatal("Error reading packet: %m");
797 * Got a M_PROTO or M_PCPROTO message. Interpret it
798 * as a DLPI primitive??
801 dbglog("got dlpi prim 0x%x, len=%d",
802 ((union DL_primitives *)ctrlbuf)->dl_primitive, ctrl.len);
808 * get_loop_output - get outgoing packets from the ppp device,
809 * and detect when we want to bring the real link up.
810 * Return value is 1 if we need to bring up the link, 0 otherwise.
818 while ((len = read_packet(inpacket_buf)) > 0) {
819 if (loop_frame(inpacket_buf, len))
826 * ppp_send_config - configure the transmit characteristics of
830 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
839 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
840 if (hungup && errno == ENXIO)
842 error("Couldn't set MTU: %m");
845 /* can't set these if we don't have a stream attached below /dev/ppp */
846 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
847 error("Couldn't set transmit ACCM: %m");
849 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
850 cf[1] = COMP_PROT | COMP_AC;
851 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
852 error("Couldn't set prot/AC compression: %m");
856 /* set the MTU for IP as well */
857 memset(&ifr, 0, sizeof(ifr));
858 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
859 ifr.ifr_metric = link_mtu;
860 if (ioctl(ipfd, SIOCSIFMTU, &ifr) < 0) {
861 error("Couldn't set IP MTU: %m");
866 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
869 ppp_set_xaccm(unit, accm)
874 && strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
875 if (!hungup || errno != ENXIO)
876 warn("Couldn't set extended ACCM: %m");
881 * ppp_recv_config - configure the receive-side characteristics of
885 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
893 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
894 if (hungup && errno == ENXIO)
896 error("Couldn't set MRU: %m");
899 /* can't set these if we don't have a stream attached below /dev/ppp */
900 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
901 error("Couldn't set receive ACCM: %m");
903 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
904 cf[1] = DECOMP_PROT | DECOMP_AC;
905 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
906 error("Couldn't set prot/AC decompression: %m");
912 * ccp_test - ask kernel whether a given compression method
913 * is acceptable for use.
916 ccp_test(unit, opt_ptr, opt_len, for_transmit)
917 int unit, opt_len, for_transmit;
920 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
921 opt_ptr, opt_len, 0) >= 0)
923 return (errno == ENOSR)? 0: -1;
927 * ccp_flags_set - inform kernel about the current state of CCP.
930 ccp_flags_set(unit, isopen, isup)
931 int unit, isopen, isup;
935 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
936 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
937 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
938 if (!hungup || errno != ENXIO)
939 error("Couldn't set kernel CCP state: %m");
944 * get_idle_time - return how long the link has been idle.
951 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
955 * get_ppp_stats - return statistics for the link.
958 get_ppp_stats(u, stats)
960 struct pppd_stats *stats;
964 if (strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
965 error("Couldn't get link statistics: %m");
968 stats->bytes_in = s.p.ppp_ibytes;
969 stats->bytes_out = s.p.ppp_obytes;
975 * set_filters - transfer the pass and active filters to the kernel.
978 set_filters(pass, active)
979 struct bpf_program *pass, *active;
983 if (pass->bf_len > 0) {
984 if (strioctl(pppfd, PPPIO_PASSFILT, pass,
985 sizeof(struct bpf_program), 0) < 0) {
986 error("Couldn't set pass-filter in kernel: %m");
990 if (active->bf_len > 0) {
991 if (strioctl(pppfd, PPPIO_ACTIVEFILT, active,
992 sizeof(struct bpf_program), 0) < 0) {
993 error("Couldn't set active-filter in kernel: %m");
1002 * ccp_fatal_error - returns 1 if decompression was disabled as a
1003 * result of an error detected after decompression of a packet,
1004 * 0 otherwise. This is necessary because of patent nonsense.
1007 ccp_fatal_error(unit)
1013 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1014 if (errno != ENXIO && errno != EINVAL)
1015 error("Couldn't get compression flags: %m");
1018 return cf[0] & CCP_FATALERROR;
1022 * sifvjcomp - config tcp header compression
1025 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1026 int u, vjcomp, xcidcomp, xmaxcid;
1032 maxcid[0] = xcidcomp;
1033 maxcid[1] = 15; /* XXX should be rmaxcid */
1034 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1035 error("Couldn't initialize VJ compression: %m");
1039 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1040 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1041 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1042 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1044 error("Couldn't enable VJ compression: %m");
1051 * sifup - Config the interface up and enable IP packets to pass.
1059 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1060 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1061 error("Couldn't mark interface up (get): %m");
1064 ifr.ifr_flags |= IFF_UP;
1065 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1066 error("Couldn't mark interface up (set): %m");
1074 * sifdown - Config the interface down and disable IP.
1084 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1085 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) {
1086 error("Couldn't mark interface down (get): %m");
1089 ifr.ifr_flags &= ~IFF_UP;
1090 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1091 error("Couldn't mark interface down (set): %m");
1099 * sifnpmode - Set the mode for handling packets for a given NP.
1102 sifnpmode(u, proto, mode)
1110 npi[1] = (int) mode;
1111 if (strioctl(pppfd, PPPIO_NPMODE, &npi, 2 * sizeof(int), 0) < 0) {
1112 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1118 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1121 * sifaddr - Config the interface IP addresses and netmask.
1131 memset(&ifr, 0, sizeof(ifr));
1132 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1133 ifr.ifr_addr.sa_family = AF_INET;
1134 INET_ADDR(ifr.ifr_addr) = m;
1135 if (ioctl(ipfd, SIOCSIFNETMASK, &ifr) < 0) {
1136 error("Couldn't set IP netmask: %m");
1139 ifr.ifr_addr.sa_family = AF_INET;
1140 INET_ADDR(ifr.ifr_addr) = o;
1141 if (ioctl(ipfd, SIOCSIFADDR, &ifr) < 0) {
1142 error("Couldn't set local IP address: %m");
1147 * On some systems, we have to explicitly set the point-to-point
1148 * flag bit before we can set a destination address.
1150 if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) >= 0
1151 && (ifr.ifr_flags & IFF_POINTOPOINT) == 0) {
1152 ifr.ifr_flags |= IFF_POINTOPOINT;
1153 if (ioctl(ipfd, SIOCSIFFLAGS, &ifr) < 0) {
1154 error("Couldn't mark interface pt-to-pt: %m");
1158 ifr.ifr_dstaddr.sa_family = AF_INET;
1159 INET_ADDR(ifr.ifr_dstaddr) = h;
1160 if (ioctl(ipfd, SIOCSIFDSTADDR, &ifr) < 0) {
1161 error("Couldn't set remote IP address: %m");
1164 #if 0 /* now done in ppp_send_config */
1165 ifr.ifr_metric = link_mtu;
1166 if (ioctl(ipfd, SIOCSIFMTU, &ifr) < 0) {
1167 error("Couldn't set IP MTU: %m");
1176 * cifaddr - Clear the interface IP addresses, and delete routes
1177 * through the interface if possible.
1184 #if defined(__USLC__) /* was: #if 0 */
1185 cifroute(unit, ouraddr, hisaddr);
1187 notice("Removing ppp interface unit");
1188 if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) {
1189 error("Can't remove ppp interface unit: %m");
1200 * sifdefaultroute - assign a default route through the address given.
1203 sifdefaultroute(u, l, g)
1209 #if defined(__USLC__)
1210 g = l; /* use the local address as gateway */
1212 memset(&rt, 0, sizeof(rt));
1213 rt.rt_dst.sa_family = AF_INET;
1214 INET_ADDR(rt.rt_dst) = 0;
1215 rt.rt_gateway.sa_family = AF_INET;
1216 INET_ADDR(rt.rt_gateway) = g;
1217 rt.rt_flags = RTF_GATEWAY;
1219 if (ioctl(ipfd, SIOCADDRT, &rt) < 0) {
1220 error("Can't add default route: %m");
1224 default_route_gateway = g;
1229 * cifdefaultroute - delete a default route through the address given.
1232 cifdefaultroute(u, l, g)
1238 #if defined(__USLC__)
1239 g = l; /* use the local address as gateway */
1241 memset(&rt, 0, sizeof(rt));
1242 rt.rt_dst.sa_family = AF_INET;
1243 INET_ADDR(rt.rt_dst) = 0;
1244 rt.rt_gateway.sa_family = AF_INET;
1245 INET_ADDR(rt.rt_gateway) = g;
1246 rt.rt_flags = RTF_GATEWAY;
1248 if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
1249 error("Can't delete default route: %m");
1253 default_route_gateway = 0;
1258 * sifproxyarp - Make a proxy ARP entry for the peer.
1261 sifproxyarp(unit, hisaddr)
1265 struct arpreq arpreq;
1267 memset(&arpreq, 0, sizeof(arpreq));
1268 if (!get_ether_addr(hisaddr, &arpreq.arp_ha))
1271 arpreq.arp_pa.sa_family = AF_INET;
1272 INET_ADDR(arpreq.arp_pa) = hisaddr;
1273 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1274 if (ioctl(ipfd, SIOCSARP, (caddr_t) &arpreq) < 0) {
1275 error("Couldn't set proxy ARP entry: %m");
1279 proxy_arp_addr = hisaddr;
1284 * cifproxyarp - Delete the proxy ARP entry for the peer.
1287 cifproxyarp(unit, hisaddr)
1291 struct arpreq arpreq;
1293 memset(&arpreq, 0, sizeof(arpreq));
1294 arpreq.arp_pa.sa_family = AF_INET;
1295 INET_ADDR(arpreq.arp_pa) = hisaddr;
1296 if (ioctl(ipfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1297 error("Couldn't delete proxy ARP entry: %m");
1306 * get_ether_addr - get the hardware address of an interface on the
1307 * the same subnet as ipaddr.
1312 get_ether_addr(ipaddr, hwaddr)
1314 struct sockaddr *hwaddr;
1316 struct ifreq *ifr, *ifend, ifreq;
1319 u_int32_t ina, mask;
1322 * Scan through the system's network interfaces.
1325 if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
1328 ifc.ifc_len = nif * sizeof(struct ifreq);
1329 ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
1330 if (ifc.ifc_buf == 0)
1332 if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
1333 warn("Couldn't get system interface list: %m");
1337 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1338 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1339 if (ifr->ifr_addr.sa_family != AF_INET)
1342 * Check that the interface is up, and not point-to-point or loopback.
1344 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1345 if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
1347 if ((ifreq.ifr_flags &
1348 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1349 != (IFF_UP|IFF_BROADCAST))
1352 * Get its netmask and check that it's on the right subnet.
1354 if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
1356 ina = INET_ADDR(ifr->ifr_addr);
1357 mask = INET_ADDR(ifreq.ifr_addr);
1358 if ((ipaddr & mask) == (ina & mask))
1363 warn("No suitable interface found for proxy ARP");
1368 info("found interface %s for proxy ARP", ifr->ifr_name);
1369 if (!get_hw_addr(ifr->ifr_name, ina, hwaddr)) {
1370 error("Couldn't get hardware address for %s", ifr->ifr_name);
1380 * get_hw_addr - obtain the hardware address for a named interface.
1383 get_hw_addr(name, ina, hwaddr)
1386 struct sockaddr *hwaddr;
1389 /* New way - get the address by doing an arp request. */
1393 s = socket(AF_INET, SOCK_DGRAM, 0);
1396 memset(&req, 0, sizeof(req));
1397 req.arp_pa.sa_family = AF_INET;
1398 INET_ADDR(req.arp_pa) = ina;
1399 if (ioctl(s, SIOCGARP, &req) < 0) {
1400 error("Couldn't get ARP entry for %s: %m", ip_ntoa(ina));
1403 *hwaddr = req.arp_ha;
1404 hwaddr->sa_family = AF_UNSPEC;
1408 int unit, iffd, adrlen;
1409 unsigned char *adrp;
1412 union DL_primitives prim;
1417 * We have to open the device and ask it for its hardware address.
1418 * First split apart the device name and unit.
1420 slprintf(ifdev, sizeof(ifdev), "/dev/%s", name);
1421 for (q = ifdev + strlen(ifdev); --q >= ifdev; )
1428 * Open the device and do a DLPI attach and phys_addr_req.
1430 iffd = open(ifdev, O_RDWR);
1432 error("Can't open %s: %m", ifdev);
1435 if (dlpi_attach(iffd, unit) < 0
1436 || dlpi_get_reply(iffd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0
1437 || dlpi_info_req(iffd) < 0
1438 || dlpi_get_reply(iffd, &reply.prim, DL_INFO_ACK, sizeof(reply)) < 0) {
1443 adrlen = reply.prim.info_ack.dl_addr_length;
1444 adrp = (unsigned char *)&reply + reply.prim.info_ack.dl_addr_offset;
1445 #if DL_CURRENT_VERSION >= 2
1446 if (reply.prim.info_ack.dl_sap_length < 0)
1447 adrlen += reply.prim.info_ack.dl_sap_length;
1449 adrp += reply.prim.info_ack.dl_sap_length;
1451 hwaddr->sa_family = AF_UNSPEC;
1452 memcpy(hwaddr->sa_data, adrp, adrlen);
1459 dlpi_attach(fd, ppa)
1462 dl_attach_req_t req;
1465 req.dl_primitive = DL_ATTACH_REQ;
1467 buf.len = sizeof(req);
1468 buf.buf = (void *) &req;
1469 return putmsg(fd, &buf, NULL, RS_HIPRI);
1479 req.dl_primitive = DL_INFO_REQ;
1480 buf.len = sizeof(req);
1481 buf.buf = (void *) &req;
1482 return putmsg(fd, &buf, NULL, RS_HIPRI);
1486 dlpi_get_reply(fd, reply, expected_prim, maxlen)
1487 union DL_primitives *reply;
1488 int fd, expected_prim, maxlen;
1495 * Use poll to wait for a message with a timeout.
1498 pfd.events = POLLIN | POLLPRI;
1500 n = poll(&pfd, 1, 1000);
1501 } while (n == -1 && errno == EINTR);
1508 buf.maxlen = maxlen;
1509 buf.buf = (void *) reply;
1511 if (getmsg(fd, &buf, NULL, &flags) < 0)
1514 if (buf.len < sizeof(ulong)) {
1516 dbglog("dlpi response short (len=%d)\n", buf.len);
1520 if (reply->dl_primitive == expected_prim)
1524 if (reply->dl_primitive == DL_ERROR_ACK) {
1525 dbglog("dlpi error %d (unix errno %d) for prim %x\n",
1526 reply->error_ack.dl_errno, reply->error_ack.dl_unix_errno,
1527 reply->error_ack.dl_error_primitive);
1529 dbglog("dlpi unexpected response prim %x\n",
1530 reply->dl_primitive);
1538 * Return user specified netmask, modified by any mask we might determine
1539 * for address `addr' (in network byte order).
1540 * Here we scan through the system's list of interfaces, looking for
1541 * any non-point-to-point interfaces which might appear to be on the same
1542 * network as `addr'. If we find any, we OR in their netmask to the
1543 * user-specified netmask.
1549 u_int32_t mask, nmask, ina;
1550 struct ifreq *ifr, *ifend, ifreq;
1555 if (IN_CLASSA(addr)) /* determine network mask for address class */
1556 nmask = IN_CLASSA_NET;
1557 else if (IN_CLASSB(addr))
1558 nmask = IN_CLASSB_NET;
1560 nmask = IN_CLASSC_NET;
1561 /* class D nets are disallowed by bad_ip_adrs */
1562 mask = netmask | htonl(nmask);
1565 * Scan through the system's network interfaces.
1568 if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0)
1571 ifc.ifc_len = nif * sizeof(struct ifreq);
1572 ifc.ifc_buf = (caddr_t) malloc(ifc.ifc_len);
1573 if (ifc.ifc_buf == 0)
1575 if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) {
1576 warn("Couldn't get system interface list: %m");
1580 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1581 for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
1583 * Check the interface's internet address.
1585 if (ifr->ifr_addr.sa_family != AF_INET)
1587 ina = INET_ADDR(ifr->ifr_addr);
1588 if ((ntohl(ina) & nmask) != (addr & nmask))
1591 * Check that the interface is up, and not point-to-point or loopback.
1593 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1594 if (ioctl(ipfd, SIOCGIFFLAGS, &ifreq) < 0)
1596 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1600 * Get its netmask and OR it into our mask.
1602 if (ioctl(ipfd, SIOCGIFNETMASK, &ifreq) < 0)
1604 mask |= INET_ADDR(ifreq.ifr_addr);
1612 * logwtmp - write an accounting record to the /var/adm/wtmp file.
1615 logwtmp(line, name, host)
1616 const char *line, *name, *host;
1618 static struct utmpx utmpx;
1622 strncpy(utmpx.ut_user, name, sizeof(utmpx.ut_user));
1623 strncpy(utmpx.ut_id, ifname, sizeof(utmpx.ut_id));
1624 strncpy(utmpx.ut_line, line, sizeof(utmpx.ut_line));
1625 utmpx.ut_pid = getpid();
1626 utmpx.ut_type = USER_PROCESS;
1628 utmpx.ut_type = DEAD_PROCESS;
1630 gettimeofday(&utmpx.ut_tv, NULL);
1631 updwtmpx("/var/adm/wtmpx", &utmpx);
1635 * get_host_seed - return the serial number of this machine.
1642 if (sysinfo(SI_HW_SERIAL, buf, sizeof(buf)) < 0) {
1643 error("sysinfo: %m");
1646 return (int) strtoul(buf, NULL, 16);
1650 strioctl(fd, cmd, ptr, ilen, olen)
1651 int fd, cmd, ilen, olen;
1654 struct strioctl str;
1660 if (ioctl(fd, I_STR, &str) == -1)
1662 if (str.ic_len != olen)
1663 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1664 olen, str.ic_len, cmd);
1670 * lock - create a lock file for the named lock device
1673 #define LOCK_PREFIX "/var/spool/locks/LK."
1674 static char lock_file[40]; /* name of lock file created */
1684 if (stat(dev, &sbuf) < 0) {
1685 error("Can't get device number for %s: %m", dev);
1688 if ((sbuf.st_mode & S_IFMT) != S_IFCHR) {
1689 error("Can't lock %s: not a character device", dev);
1692 slprintf(lock_file, sizeof(lock_file), "%s%03d.%03d.%03d",
1693 LOCK_PREFIX, major(sbuf.st_dev),
1694 major(sbuf.st_rdev), minor(sbuf.st_rdev));
1696 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1698 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1699 /* Read the lock file to find out who has the device locked */
1700 n = read(fd, ascii_pid, 11);
1702 error("Can't read pid from lock file %s", lock_file);
1706 pid = atoi(ascii_pid);
1707 if (pid > 0 && kill(pid, 0) == -1 && errno == ESRCH) {
1708 /* pid no longer exists - remove the lock file */
1709 if (unlink(lock_file) == 0) {
1711 notice("Removed stale lock on %s (pid %d)",
1715 warn("Couldn't remove stale lock on %s",
1718 notice("Device %s is locked by pid %d",
1723 error("Can't create lock file %s: %m", lock_file);
1728 slprintf(ascii_pid, sizeof(ascii_pid), "%10d\n", getpid());
1729 write(fd, ascii_pid, 11);
1736 * unlock - remove our lockfile
1749 * cifroute - delete a route through the addresses given.
1752 cifroute(u, our, his)
1758 memset(&rt, 0, sizeof(rt));
1759 rt.rt_dst.sa_family = AF_INET;
1760 INET_ADDR(rt.rt_dst) = his;
1761 rt.rt_gateway.sa_family = AF_INET;
1762 INET_ADDR(rt.rt_gateway) = our;
1763 rt.rt_flags = RTF_HOST;
1765 if (ioctl(ipfd, SIOCDELRT, &rt) < 0) {
1766 error("Can't delete route: %m");
1774 * have_route_to - determine if the system has a route to the specified
1775 * IP address. Returns 0 if not, 1 if so, -1 if we can't tell.
1776 * `addr' is in network byte order.
1777 * For demand mode to work properly, we have to ignore routes
1778 * through our own interface.
1780 #ifndef T_CURRENT /* needed for Solaris 2.5 */
1781 #define T_CURRENT MI_T_CURRENT
1789 int fd, r, flags, i;
1791 struct T_optmgmt_req req;
1795 struct T_optmgmt_ack ack;
1796 unsigned char space[64];
1799 struct strbuf cbuf, dbuf;
1801 mib2_ipRouteEntry_t routes[8];
1802 mib2_ipRouteEntry_t *rp;
1804 fd = open("/dev/ip", O_RDWR);
1806 warn("have_route_to: couldn't open /dev/ip: %m");
1810 req.req.PRIM_type = T_OPTMGMT_REQ;
1811 req.req.OPT_offset = (char *) &req.hdr - (char *) &req;
1812 req.req.OPT_length = sizeof(req.hdr);
1813 req.req.MGMT_flags = T_CURRENT;
1815 req.hdr.level = MIB2_IP;
1819 cbuf.buf = (char *) &req;
1820 cbuf.len = sizeof(req);
1822 if (putmsg(fd, &cbuf, NULL, 0) == -1) {
1823 warn("have_route_to: putmsg: %m");
1829 cbuf.buf = (char *) &ack;
1830 cbuf.maxlen = sizeof(ack);
1831 dbuf.buf = (char *) routes;
1832 dbuf.maxlen = sizeof(routes);
1834 r = getmsg(fd, &cbuf, &dbuf, &flags);
1836 warn("have_route_to: getmsg: %m");
1841 if (cbuf.len < sizeof(struct T_optmgmt_ack)
1842 || ack.ack.PRIM_type != T_OPTMGMT_ACK
1843 || ack.ack.MGMT_flags != T_SUCCESS
1844 || ack.ack.OPT_length < sizeof(struct opthdr)) {
1845 dbglog("have_route_to: bad message len=%d prim=%d",
1846 cbuf.len, ack.ack.PRIM_type);
1851 rh = (struct opthdr *) ((char *)&ack + ack.ack.OPT_offset);
1852 if (rh->level == 0 && rh->name == 0)
1854 if (rh->level != MIB2_IP || rh->name != MIB2_IP_21) {
1855 while (r == MOREDATA)
1856 r = getmsg(fd, NULL, &dbuf, &flags);
1861 nroutes = dbuf.len / sizeof(mib2_ipRouteEntry_t);
1862 for (rp = routes, i = 0; i < nroutes; ++i, ++rp) {
1863 if (rp->ipRouteMask != ~0) {
1864 dbglog("have_route_to: dest=%x gw=%x mask=%x\n",
1865 rp->ipRouteDest, rp->ipRouteNextHop,
1867 if (((addr ^ rp->ipRouteDest) & rp->ipRouteMask) == 0
1868 && rp->ipRouteNextHop != remote_addr)
1874 r = getmsg(fd, NULL, &dbuf, &flags);
1885 * get_pty - get a pty master/slave pair and chown the slave side to
1886 * the uid given. Assumes slave_name points to MAXPATHLEN bytes of space.
1889 get_pty(master_fdp, slave_fdp, slave_name, uid)
1897 struct termios tios;
1899 mfd = open("/dev/ptmx", O_RDWR);
1901 error("Couldn't open pty master: %m");
1905 pty_name = ptsname(mfd);
1906 if (pty_name == NULL) {
1907 error("Couldn't get name of pty slave");
1911 if (chown(pty_name, uid, -1) < 0)
1912 warn("Couldn't change owner of pty slave: %m");
1913 if (chmod(pty_name, S_IRUSR | S_IWUSR) < 0)
1914 warn("Couldn't change permissions on pty slave: %m");
1915 if (unlockpt(mfd) < 0)
1916 warn("Couldn't unlock pty slave: %m");
1918 sfd = open(pty_name, O_RDWR);
1920 error("Couldn't open pty slave %s: %m", pty_name);
1924 if (ioctl(sfd, I_PUSH, "ptem") < 0)
1925 warn("Couldn't push ptem module on pty slave: %m");
1927 dbglog("Using %s", pty_name);
1928 strlcpy(slave_name, pty_name, MAXPATHLEN);