2 * sys-linux.c - System-dependent procedures for setting up
3 * PPP interfaces on Linux systems
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.
21 #include <sys/ioctl.h>
22 #include <sys/types.h>
23 #include <sys/socket.h>
25 #include <sys/errno.h>
28 #include <sys/utsname.h>
44 /* This is in netdevice.h. However, this compile will fail miserably if
45 you attempt to include netdevice.h because it has so many references
46 to __memcpy functions which it should not attempt to do. So, since I
47 really don't use it, but it must be defined, define it now. */
50 #define MAX_ADDR_LEN 7
54 #include <asm/types.h> /* glibc 2 conflicts with linux/types.h */
56 #include <net/if_arp.h>
57 #include <net/route.h>
58 #include <netinet/if_ether.h>
60 #include <linux/types.h>
62 #include <linux/if_arp.h>
63 #include <linux/route.h>
64 #include <linux/if_ether.h>
66 #include <netinet/in.h>
67 #include <arpa/inet.h>
69 #include <linux/ppp_defs.h>
70 #include <linux/if_ppp.h>
75 #include "patchlevel.h"
79 #if __GLIBC__ >= 2 && \
80 !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
81 #include <netipx/ipx.h>
83 #include <linux/ipx.h>
85 #endif /* IPX_CHANGE */
88 #include <sys/locks.h>
91 #ifndef RTF_DEFAULT /* Normally in <linux/route.h> from <net/route.h> */
95 #define ok_error(num) ((num)==EIO)
97 static int tty_disc = N_TTY; /* The TTY discipline */
98 static int ppp_disc = N_PPP; /* The PPP discpline */
99 static int initfdflags = -1; /* Initial file descriptor flags for fd */
100 static int ppp_fd = -1; /* fd which is set to PPP discipline */
101 static int sock_fd = -1; /* socket for doing interface ioctls */
102 static int slave_fd = -1;
103 static int master_fd = -1;
105 static int has_proxy_arp = 0;
106 static int driver_version = 0;
107 static int driver_modification = 0;
108 static int driver_patch = 0;
109 static int driver_is_old = 0;
110 static int restore_term = 0; /* 1 => we've munged the terminal */
111 static struct termios inittermios; /* Initial TTY termios */
113 static char loop_name[20];
114 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
116 static int if_is_up; /* Interface has been marked up */
117 static u_int32_t default_route_gateway; /* Gateway for default route added */
118 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
120 static char *lock_file;
122 static struct utsname utsname; /* for the kernel version */
123 static int kernel_version;
124 #define KVERSION(j,n,p) ((j)*1000000 + (n)*1000 + (p))
128 #define FLAGS_GOOD (IFF_UP | IFF_BROADCAST)
129 #define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \
130 IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP)
132 /* Prototypes for procedures local to this file. */
133 static int get_flags (void);
134 static void set_flags (int flags);
135 static int translate_speed (int bps);
136 static int baud_rate_of (int speed);
137 static char *path_to_route (void);
138 static void close_route_table (void);
139 static int open_route_table (void);
140 static int read_route_table (struct rtentry *rt);
141 static int defaultroute_exists (struct rtentry *rt);
142 static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr,
144 static void decode_version (char *buf, int *version, int *mod, int *patch);
146 extern u_char inpacket_buf[]; /* borrowed from main.c */
149 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
153 #define SET_SA_FAMILY(addr, family) \
154 memset ((char *) &(addr), '\0', sizeof(addr)); \
155 addr.sa_family = (family);
158 * Determine if the PPP connection should still be present.
164 #define LOCK_PREFIX "/var/lock/LCK.."
167 static void set_ppp_fd (int new_fd)
169 SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd));
173 static int still_ppp(void)
175 if (!hungup || ppp_fd == slave_fd)
178 set_ppp_fd(slave_fd);
184 /********************************************************************
186 * Functions to read and set the flags value in the device driver
189 static int get_flags (void)
193 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0)
195 if ( ok_error (errno) )
201 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
206 SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
210 /********************************************************************/
212 static void set_flags (int flags)
214 SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
216 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
218 if (! ok_error (errno) )
220 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS, %x): %m(%d)", flags, errno);
226 /********************************************************************
228 * sys_init - System-dependent initialization.
233 int osmaj, osmin, ospatch;
235 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
236 setlogmask(LOG_UPTO(LOG_INFO));
239 setlogmask(LOG_UPTO(LOG_DEBUG));
242 /* Get an internet socket for doing socket ioctls. */
243 sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
246 if ( ! ok_error ( errno ))
248 syslog(LOG_ERR, "Couldn't create IP socket: %m(%d)", errno);
254 osmaj = osmin = ospatch = 0;
255 sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch);
256 kernel_version = KVERSION(osmaj, osmin, ospatch);
259 /********************************************************************
261 * sys_cleanup - restore any system state we modified before exiting:
262 * mark the interface down, delete default route and/or proxy arp entry.
263 * This should call die() because it's called from die().
266 void sys_cleanup(void)
269 * Take down the device
276 * Delete any routes through the device.
278 if (default_route_gateway != 0)
280 cifdefaultroute(0, 0, default_route_gateway);
285 cifproxyarp(0, proxy_arp_addr);
289 /********************************************************************
291 * sys_close - Clean up in a child process before execing.
301 /********************************************************************
303 * note_debug_level - note a change in the debug level.
306 void note_debug_level (void)
310 SYSDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug));
311 setlogmask(LOG_UPTO(LOG_DEBUG));
315 setlogmask(LOG_UPTO(LOG_WARNING));
319 /********************************************************************
321 * set_kdebugflag - Define the debugging level for the kernel
324 int set_kdebugflag (int requested_level)
326 if (ioctl(ppp_fd, PPPIOCSDEBUG, &requested_level) < 0)
328 if ( ! ok_error (errno) )
330 syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
334 SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
339 /********************************************************************
341 * establish_ppp - Turn the serial port into a ppp interface.
344 void establish_ppp (int tty_fd)
348 * The current PPP device will be the tty file.
352 * Ensure that the tty device is in exclusive mode.
354 if (ioctl(tty_fd, TIOCEXCL, 0) < 0)
356 if ( ! ok_error ( errno ))
358 syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
362 * Demand mode - prime the old ppp device to relinquish the unit.
364 if (demand && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0)
366 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m(%d)", errno);
370 * Set the current tty to the PPP discpline
372 if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
374 if ( ! ok_error (errno) )
376 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
381 * Find out which interface we were given.
383 if (ioctl(ppp_fd, PPPIOCGUNIT, &x) < 0)
385 if ( ! ok_error (errno))
387 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
392 * Check that we got the same unit again.
398 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
406 * Enable debug in the driver if requested.
409 set_kdebugflag (kdebugflag);
411 set_flags (get_flags() & ~(SC_RCV_B7_0 | SC_RCV_B7_1 |
412 SC_RCV_EVNP | SC_RCV_ODDP));
414 SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
415 driver_version, driver_modification, driver_patch));
417 * Fetch the initial file flags and reset blocking mode on the file.
419 initfdflags = fcntl(ppp_fd, F_GETFL);
421 if (initfdflags == -1 ||
422 fcntl(ppp_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1)
424 if ( ! ok_error (errno))
427 "Couldn't set device to non-blocking mode: %m");
432 /********************************************************************
434 * disestablish_ppp - Restore the serial port to normal operation.
435 * This shouldn't call die() because it's called from die().
438 void disestablish_ppp(int tty_fd)
441 * Attempt to restore the previous tty settings
446 * Restore the previous line discipline
448 if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0)
450 if ( ! ok_error (errno))
452 syslog(LOG_ERR, "ioctl(TIOCSETD, N_TTY): %m");
456 if (ioctl(tty_fd, TIOCNXCL, 0) < 0)
458 if ( ! ok_error (errno))
460 syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m(%d)", errno);
464 /* Reset non-blocking mode on fd. */
465 if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0)
467 if ( ! ok_error (errno))
470 "Couldn't restore device fd flags: %m");
477 /********************************************************************
479 * clean_check - Fetch the flags for the device and generate
480 * appropriate error messages.
482 void clean_check(void)
489 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0)
492 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP))
495 case SC_RCV_B7_0 | SC_RCV_EVNP:
496 case SC_RCV_B7_0 | SC_RCV_ODDP:
497 case SC_RCV_B7_0 | SC_RCV_ODDP | SC_RCV_EVNP:
498 s = "all had bit 7 set to 1";
502 case SC_RCV_B7_1 | SC_RCV_EVNP:
503 case SC_RCV_B7_1 | SC_RCV_ODDP:
504 case SC_RCV_B7_1 | SC_RCV_ODDP | SC_RCV_EVNP:
505 s = "all had bit 7 set to 0";
509 s = "all had odd parity";
513 s = "all had even parity";
519 syslog(LOG_WARNING, "Receive serial link is not"
521 syslog(LOG_WARNING, "Problem: %s", s);
529 * List of valid speeds.
533 int speed_int, speed_val;
610 /********************************************************************
612 * Translate from bits/second to a speed_t.
615 static int translate_speed (int bps)
617 struct speed *speedp;
621 for (speedp = speeds; speedp->speed_int; speedp++)
623 if (bps == speedp->speed_int)
625 return speedp->speed_val;
628 syslog(LOG_WARNING, "speed %d not supported", bps);
633 /********************************************************************
635 * Translate from a speed_t to bits/second.
638 static int baud_rate_of (int speed)
640 struct speed *speedp;
644 for (speedp = speeds; speedp->speed_int; speedp++)
646 if (speed == speedp->speed_val)
648 return speedp->speed_int;
655 /********************************************************************
657 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
658 * at the requested speed, etc. If `local' is true, set CLOCAL
659 * regardless of whether the modem option was specified.
662 void set_up_tty(int tty_fd, int local)
668 if (tcgetattr(tty_fd, &tios) < 0)
670 syslog(LOG_ERR, "tcgetattr: %m(%d)", errno);
679 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
680 tios.c_cflag |= CS8 | CREAD | HUPCL;
682 tios.c_iflag = IGNBRK | IGNPAR;
686 tios.c_cc[VTIME] = 0;
690 tios.c_cflag ^= (CLOCAL | HUPCL);
696 tios.c_cflag |= CRTSCTS;
700 tios.c_iflag |= IXON | IXOFF;
701 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
702 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
706 tios.c_cflag &= ~CRTSCTS;
713 speed = translate_speed(inspeed);
716 cfsetospeed (&tios, speed);
717 cfsetispeed (&tios, speed);
720 * We can't proceed if the serial port speed is B0,
721 * since that implies that the serial port is disabled.
725 speed = cfgetospeed(&tios);
728 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
734 if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0)
736 syslog(LOG_ERR, "tcsetattr: %m");
740 baud_rate = baud_rate_of(speed);
745 * hangup_modem - hang up the modem by clearing DTR.
747 void hangup_modem(int ttyfd)
752 /********************************************************************
754 * setdtr - control the DTR line on the serial port.
755 * This is called from die(), so it shouldn't call die().
758 void setdtr (int tty_fd, int on)
760 int modembits = TIOCM_DTR;
762 ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
765 /********************************************************************
767 * restore_tty - restore the terminal to the saved settings.
770 void restore_tty (int tty_fd)
776 * Turn off echoing, because otherwise we can get into
777 * a loop with the tty and the modem echoing to each other.
778 * We presume we are the sole user of this tty device, so
779 * when we close it, it will revert to its defaults anyway.
783 inittermios.c_lflag &= ~(ECHO | ECHONL);
786 if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0)
788 if (! ok_error (errno))
790 syslog(LOG_WARNING, "tcsetattr: %m");
796 /********************************************************************
798 * output - Output PPP packet.
801 void output (int unit, unsigned char *p, int len)
805 log_packet(p, len, "sent ", LOG_DEBUG);
808 if (write(ppp_fd, p, len) < 0)
810 if (errno == EWOULDBLOCK || errno == ENOBUFS
811 || errno == ENXIO || errno == EIO || errno == EINTR)
813 syslog(LOG_WARNING, "write: warning: %m (%d)", errno);
817 syslog(LOG_ERR, "write: %m (%d)", errno);
822 /********************************************************************
824 * wait_input - wait until there is data available on ppp_fd,
825 * for the length of time specified by *timo (indefinite
829 void wait_input (struct timeval *timo)
835 FD_SET(ppp_fd, &ready);
837 n = select(ppp_fd + 1, &ready, NULL, &ready, timo);
838 if (n < 0 && errno != EINTR)
840 syslog(LOG_ERR, "select: %m(%d)", errno);
845 /********************************************************************
847 * wait_loop_output - wait until there is data available on the
848 * loopback, for the length of time specified by *timo (indefinite
851 void wait_loop_output(timo)
852 struct timeval *timo;
858 FD_SET(master_fd, &ready);
859 n = select(master_fd + 1, &ready, NULL, &ready, timo);
860 if (n < 0 && errno != EINTR)
862 syslog(LOG_ERR, "select: %m(%d)", errno);
867 /********************************************************************
869 * wait_time - wait for a given length of time or until a
870 * signal is received.
874 struct timeval *timo;
878 n = select(0, NULL, NULL, NULL, timo);
879 if (n < 0 && errno != EINTR) {
880 syslog(LOG_ERR, "select: %m(%d)", errno);
885 /********************************************************************
887 * read_packet - get a PPP packet from the serial device.
890 int read_packet (unsigned char *buf)
894 len = read(ppp_fd, buf, PPP_MTU + PPP_HDRLEN);
897 if (errno == EWOULDBLOCK)
901 syslog(LOG_ERR, "read: %m(%d)", errno);
907 /********************************************************************
909 * get_loop_output - get outgoing packets from the ppp device,
910 * and detect when we want to bring the real link up.
911 * Return value is 1 if we need to bring up the link, 0 otherwise.
914 get_loop_output(void)
917 int n = read(master_fd, inbuf, sizeof(inbuf));
921 if (loop_chars(inbuf, n))
925 n = read(master_fd, inbuf, sizeof(inbuf));
930 syslog(LOG_ERR, "eof on loopback");
934 if (errno != EWOULDBLOCK)
936 syslog(LOG_ERR, "read from loopback: %m(%d)", errno);
943 /********************************************************************
945 * ppp_send_config - configure the transmit characteristics of
949 void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp)
954 SYSDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
956 * Ensure that the link is still up.
961 * Set the MTU and other parameters for the ppp device
963 memset (&ifr, '\0', sizeof (ifr));
964 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
967 if (ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
969 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m(%d)", errno);
973 SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
974 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
976 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m(%d)", errno);
981 x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
982 x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
987 /********************************************************************
989 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
992 void ppp_set_xaccm (int unit, ext_accm accm)
994 SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
995 accm[0], accm[1], accm[2], accm[3]));
997 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
999 if ( ! ok_error (errno))
1001 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m(%d)", errno);
1006 /********************************************************************
1008 * ppp_recv_config - configure the receive-side characteristics of
1009 * the ppp interface.
1012 void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp)
1016 SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
1018 * If we were called because the link has gone down then there is nothing
1019 * which may be done. Just return without incident.
1026 * Set the receiver parameters
1028 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
1030 if ( ! ok_error (errno))
1032 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m(%d)", errno);
1036 SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
1037 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
1039 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno);
1044 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
1048 /********************************************************************
1050 * ccp_test - ask kernel whether a given compression method
1051 * is acceptable for use.
1054 int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
1056 struct ppp_option_data data;
1058 memset (&data, '\0', sizeof (data));
1060 data.length = opt_len;
1061 data.transmit = for_transmit;
1063 if (ioctl(ppp_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
1068 return (errno == ENOBUFS)? 0: -1;
1071 /********************************************************************
1073 * ccp_flags_set - inform kernel about the current state of CCP.
1076 void ccp_flags_set (int unit, int isopen, int isup)
1080 int x = get_flags();
1081 x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
1082 x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP;
1087 /********************************************************************
1089 * get_idle_time - return how long the link has been idle.
1092 get_idle_time(u, ip)
1094 struct ppp_idle *ip;
1096 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
1099 /********************************************************************
1101 * ccp_fatal_error - returns 1 if decompression was disabled as a
1102 * result of an error detected after decompression of a packet,
1103 * 0 otherwise. This is necessary because of patent nonsense.
1106 int ccp_fatal_error (int unit)
1108 int x = get_flags();
1110 return x & SC_DC_FERROR;
1114 * path_to_route - determine the path to the proc file system data
1116 #define ROUTE_MAX_COLS 12
1117 FILE *route_fd = (FILE *) 0;
1118 static char route_buffer [512];
1119 static int route_dev_col, route_dest_col, route_gw_col;
1120 static int route_flags_col, route_mask_col;
1121 static int route_num_cols;
1123 static char *path_to_route (void);
1124 static int open_route_table (void);
1125 static void close_route_table (void);
1126 static int read_route_table (struct rtentry *rt);
1128 /********************************************************************
1130 * path_to_procfs - find the path to the proc file system mount point
1133 static int path_to_procfs (void)
1135 struct mntent *mntent;
1138 fp = fopen(MOUNTED, "r");
1140 /* Default the mount location of /proc */
1141 strncpy (route_buffer, "/proc", sizeof (route_buffer)-10);
1145 while ((mntent = getmntent(fp)) != NULL) {
1146 if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0)
1148 if (strcmp(mntent->mnt_type, "proc") == 0)
1155 strncpy(route_buffer, mntent->mnt_dir, sizeof (route_buffer)-10);
1156 route_buffer [sizeof (route_buffer)-10] = '\0';
1160 /********************************************************************
1162 * path_to_route - find the path to the route tables in the proc file system
1165 static char *path_to_route (void)
1167 if (!path_to_procfs()) {
1168 syslog (LOG_ERR, "proc file system not mounted");
1171 strcat (route_buffer, "/net/route");
1172 return (route_buffer);
1175 /********************************************************************
1177 * close_route_table - close the interface to the route table
1180 static void close_route_table (void)
1182 if (route_fd != (FILE *) 0) {
1184 route_fd = (FILE *) 0;
1188 /********************************************************************
1190 * open_route_table - open the interface to the route table
1192 static char route_delims[] = " \t\n";
1194 static int open_route_table (void)
1198 close_route_table();
1200 path = path_to_route();
1204 route_fd = fopen (path, "r");
1205 if (route_fd == NULL) {
1206 syslog (LOG_ERR, "can't open %s: %m (%d)", path, errno);
1210 route_dev_col = 0; /* default to usual columns */
1213 route_flags_col = 3;
1217 /* parse header line */
1218 if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) {
1219 char *p = route_buffer, *q;
1221 for (col = 0; col < ROUTE_MAX_COLS; ++col) {
1223 if ((q = strtok(p, route_delims)) == 0)
1225 if (strcasecmp(q, "iface") == 0)
1226 route_dev_col = col;
1227 else if (strcasecmp(q, "destination") == 0)
1228 route_dest_col = col;
1229 else if (strcasecmp(q, "gateway") == 0)
1231 else if (strcasecmp(q, "flags") == 0)
1232 route_flags_col = col;
1233 else if (strcasecmp(q, "mask") == 0)
1234 route_mask_col = col;
1237 if (used && col >= route_num_cols)
1238 route_num_cols = col + 1;
1246 /********************************************************************
1248 * read_route_table - read the next entry from the route table
1251 static int read_route_table(struct rtentry *rt)
1253 char *cols[ROUTE_MAX_COLS], *p;
1256 memset (rt, '\0', sizeof (struct rtentry));
1258 if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
1262 for (col = 0; col < route_num_cols; ++col) {
1263 cols[col] = strtok(p, route_delims);
1264 if (cols[col] == NULL)
1265 return 0; /* didn't get enough columns */
1268 ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
1269 strtoul(cols[route_dest_col], NULL, 16);
1271 ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
1272 strtoul(cols[route_gw_col], NULL, 16);
1274 ((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr =
1275 strtoul(cols[route_mask_col], NULL, 16);
1277 rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
1278 rt->rt_dev = cols[route_dev_col];
1283 /********************************************************************
1285 * defaultroute_exists - determine if there is a default route
1288 static int defaultroute_exists (struct rtentry *rt)
1292 if (!open_route_table())
1295 while (read_route_table(rt) != 0) {
1296 if ((rt->rt_flags & RTF_UP) == 0)
1299 if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 0L) {
1305 close_route_table();
1310 * have_route_to - determine if the system has any route to
1311 * a given IP address.
1313 int have_route_to(u_int32_t addr)
1318 if (!open_route_table())
1319 return -1; /* don't know */
1321 while (read_route_table(&rt)) {
1322 if ((rt.rt_flags & RTF_UP) == 0)
1324 if ((addr & ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr)
1325 == ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr) {
1331 close_route_table();
1335 /********************************************************************
1337 * sifdefaultroute - assign a default route through the address given.
1340 int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1344 if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0)
1346 struct in_addr old_gateway =
1347 ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr;
1349 if (old_gateway.s_addr != gateway)
1352 "not replacing existing default route to %s [%s]",
1353 rt.rt_dev, inet_ntoa (old_gateway));
1358 memset (&rt, '\0', sizeof (rt));
1359 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1360 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1362 if (kernel_version > KVERSION(2,1,0)) {
1363 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1364 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
1367 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
1369 rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
1370 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0)
1372 if ( ! ok_error ( errno ))
1374 syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m(%d)", errno);
1379 default_route_gateway = gateway;
1383 /********************************************************************
1385 * cifdefaultroute - delete a default route through the address given.
1388 int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1392 default_route_gateway = 0;
1394 memset (&rt, '\0', sizeof (rt));
1395 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1396 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1398 if (kernel_version > KVERSION(2,1,0)) {
1399 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1400 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
1403 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
1405 rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
1406 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
1410 if ( ! ok_error ( errno ))
1413 "default route ioctl(SIOCDELRT): %m(%d)", errno);
1422 /********************************************************************
1424 * sifproxyarp - Make a proxy ARP entry for the peer.
1427 int sifproxyarp (int unit, u_int32_t his_adr)
1429 struct arpreq arpreq;
1431 if (has_proxy_arp == 0)
1433 memset (&arpreq, '\0', sizeof(arpreq));
1435 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1436 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
1437 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1439 * Get the hardware address of an interface on the same subnet
1440 * as our local address.
1442 if (!get_ether_addr(his_adr, &arpreq.arp_ha, arpreq.arp_dev))
1444 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1448 if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0)
1450 if ( ! ok_error ( errno ))
1452 syslog(LOG_ERR, "ioctl(SIOCSARP): %m(%d)", errno);
1458 proxy_arp_addr = his_adr;
1463 /********************************************************************
1465 * cifproxyarp - Delete the proxy ARP entry for the peer.
1468 int cifproxyarp (int unit, u_int32_t his_adr)
1470 struct arpreq arpreq;
1472 if (has_proxy_arp == 1)
1474 memset (&arpreq, '\0', sizeof(arpreq));
1475 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1476 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
1477 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1479 if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0)
1481 if ( ! ok_error ( errno ))
1483 syslog(LOG_WARNING, "ioctl(SIOCDARP): %m(%d)", errno);
1492 /********************************************************************
1494 * get_ether_addr - get the hardware address of an interface on the
1495 * the same subnet as ipaddr.
1498 static int get_ether_addr (u_int32_t ipaddr,
1499 struct sockaddr *hwaddr,
1502 struct ifreq *ifr, *ifend;
1503 u_int32_t ina, mask;
1506 struct ifreq ifs[MAX_IFS];
1508 ifc.ifc_len = sizeof(ifs);
1510 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
1512 if ( ! ok_error ( errno ))
1514 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m(%d)", errno);
1519 SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
1520 ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
1522 * Scan through looking for an interface with an Internet
1523 * address on the same subnet as `ipaddr'.
1525 ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
1526 for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
1528 if (ifr->ifr_addr.sa_family == AF_INET)
1530 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1531 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1532 SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
1535 * Check that the interface is up, and not point-to-point
1538 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1543 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1548 * Get its netmask and check that it's on the right subnet.
1550 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1555 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1556 SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
1557 ip_ntoa(ina), ntohl(mask)));
1559 if (((ipaddr ^ ina) & mask) != 0)
1572 memcpy (name, ifreq.ifr_name, sizeof(ifreq.ifr_name));
1573 syslog(LOG_INFO, "found interface %s for proxy arp", name);
1575 * Now get the hardware address.
1577 memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
1578 if (ioctl (sock_fd, SIOCGIFHWADDR, &ifreq) < 0)
1580 syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno);
1586 sizeof (struct sockaddr));
1588 SYSDEBUG ((LOG_DEBUG,
1589 "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1590 (int) ((unsigned char *) &hwaddr->sa_data)[0],
1591 (int) ((unsigned char *) &hwaddr->sa_data)[1],
1592 (int) ((unsigned char *) &hwaddr->sa_data)[2],
1593 (int) ((unsigned char *) &hwaddr->sa_data)[3],
1594 (int) ((unsigned char *) &hwaddr->sa_data)[4],
1595 (int) ((unsigned char *) &hwaddr->sa_data)[5],
1596 (int) ((unsigned char *) &hwaddr->sa_data)[6],
1597 (int) ((unsigned char *) &hwaddr->sa_data)[7]));
1601 /********************************************************************
1603 * Return user specified netmask, modified by any mask we might determine
1604 * for address `addr' (in network byte order).
1605 * Here we scan through the system's list of interfaces, looking for
1606 * any non-point-to-point interfaces which might appear to be on the same
1607 * network as `addr'. If we find any, we OR in their netmask to the
1608 * user-specified netmask.
1611 u_int32_t GetMask (u_int32_t addr)
1613 u_int32_t mask, nmask, ina;
1614 struct ifreq *ifr, *ifend, ifreq;
1616 struct ifreq ifs[MAX_IFS];
1620 if (IN_CLASSA(addr)) /* determine network mask for address class */
1622 nmask = IN_CLASSA_NET;
1626 if (IN_CLASSB(addr))
1628 nmask = IN_CLASSB_NET;
1632 nmask = IN_CLASSC_NET;
1636 /* class D nets are disallowed by bad_ip_adrs */
1637 mask = netmask | htonl(nmask);
1639 * Scan through the system's network interfaces.
1641 ifc.ifc_len = sizeof(ifs);
1643 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
1645 if ( ! ok_error ( errno ))
1647 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m(%d)", errno);
1652 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1653 for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
1656 * Check the interface's internet address.
1658 if (ifr->ifr_addr.sa_family != AF_INET)
1662 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1663 if (((ntohl(ina) ^ addr) & nmask) != 0)
1668 * Check that the interface is up, and not point-to-point nor loopback.
1670 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1671 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1676 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1681 * Get its netmask and OR it into our mask.
1683 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1687 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1693 /********************************************************************
1695 * Internal routine to decode the version.modification.patch level
1698 static void decode_version (char *buf, int *version,
1699 int *modification, int *patch)
1701 *version = (int) strtoul (buf, &buf, 10);
1708 *modification = (int) strtoul (buf, &buf, 10);
1712 *patch = (int) strtoul (buf, &buf, 10);
1724 /********************************************************************
1726 * Procedure to determine if the PPP line discipline is registered.
1730 ppp_registered(void)
1736 local_fd = open(devnam, O_NONBLOCK | O_RDWR, 0);
1739 syslog(LOG_ERR, "Failed to open %s: %m(%d)", devnam, errno);
1743 initfdflags = fcntl(local_fd, F_GETFL);
1744 if (initfdflags == -1)
1746 syslog(LOG_ERR, "Couldn't get device fd flags: %m(%d)", errno);
1751 initfdflags &= ~O_NONBLOCK;
1752 fcntl(local_fd, F_SETFL, initfdflags);
1754 * Read the initial line dicipline and try to put the device into the
1757 if (ioctl(local_fd, TIOCGETD, &init_disc) < 0)
1759 syslog(LOG_ERR, "ioctl(TIOCGETD): %m(%d)", errno);
1764 if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0)
1766 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
1771 if (ioctl(local_fd, TIOCSETD, &init_disc) < 0)
1773 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
1782 /********************************************************************
1784 * ppp_available - check whether the system has any ppp interfaces
1785 * (in fact we check whether we can do an ioctl on ppp0).
1788 int ppp_available(void)
1793 int my_version, my_modification, my_patch;
1794 extern char *no_ppp_msg;
1796 * Open a socket for doing the ioctl operations.
1798 s = socket(AF_INET, SOCK_DGRAM, 0);
1804 strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
1805 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
1807 * If the device did not exist then attempt to create one by putting the
1808 * current tty into the PPP discipline. If this works then obtain the
1809 * flags for the device again.
1813 if (ppp_registered())
1815 strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
1816 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
1820 * Ensure that the hardware address is for PPP and not something else
1824 ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
1827 if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
1835 "This system lacks kernel support for PPP. This could be because\n"
1836 "the PPP kernel module is not loaded, or because the kernel is\n"
1837 "not configured for PPP. See the README.linux file in the\n"
1838 "ppp-2.3.6 distribution.\n";
1841 * This is the PPP device. Validate the version of the driver at this
1842 * point to ensure that this program will work with the driver.
1846 char abBuffer [1024];
1848 ifr.ifr_data = abBuffer;
1849 size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
1851 syslog(LOG_ERR, "Couldn't read driver version: %m");
1853 no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
1856 decode_version(abBuffer,
1858 &driver_modification,
1861 * Validate the version of the driver against the version that we used.
1863 decode_version(VERSION,
1868 /* The version numbers must match */
1869 if (driver_version != my_version)
1874 /* The modification levels must be legal */
1875 if (driver_modification < 3)
1877 if (driver_modification >= 2) {
1878 /* we can cope with 2.2.0 and above */
1888 sprintf (route_buffer,
1889 "Sorry - PPP driver version %d.%d.%d is out of date\n",
1890 driver_version, driver_modification, driver_patch);
1892 no_ppp_msg = route_buffer;
1899 /********************************************************************
1901 * Update the wtmp file with the appropriate user name and tty device.
1904 void logwtmp (const char *line, const char *name, const char *host)
1907 struct utmp ut, *utp;
1908 pid_t mypid = getpid();
1910 * Update the signon database for users.
1911 * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
1913 utmpname(_PATH_UTMP);
1915 while ((utp = getutent()) && (utp->ut_pid != mypid))
1918 /* Is this call really necessary? There is another one after the 'put' */
1923 memcpy(&ut, utp, sizeof(ut));
1927 /* some gettys/telnetds don't initialize utmp... */
1928 memset(&ut, 0, sizeof(ut));
1931 if (ut.ut_id[0] == 0)
1933 strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
1936 strncpy(ut.ut_user, name, sizeof(ut.ut_user));
1937 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1941 ut.ut_type = USER_PROCESS;
1944 /* Insert the host name if one is supplied */
1947 strncpy (ut.ut_host, host, sizeof(ut.ut_host));
1950 /* Insert the IP address of the remote system if IP is enabled */
1951 if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
1953 memcpy (&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
1954 sizeof(ut.ut_addr));
1957 /* CL: Makes sure that the logout works */
1958 if (*host == 0 && *name==0)
1966 * Update the wtmp file.
1968 wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
1971 flock(wtmp, LOCK_EX);
1973 /* we really should check for error on the write for a full disk! */
1974 write (wtmp, (char *)&ut, sizeof(ut));
1977 flock(wtmp, LOCK_UN);
1981 /********************************************************************
1982 * Code for locking/unlocking the serial device.
1983 * This code is derived from chat.c.
1987 * lock - create a lock file for the named device
1990 int lock (char *dev)
1994 lock_file = malloc(strlen(dev) + 1);
1995 if (lock_file == NULL)
1997 novm("lock file name");
1999 strcpy (lock_file, dev);
2000 result = mklock (dev, (void *) 0);
2004 syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, result);
2013 syslog (LOG_ERR, "Can't create lock file %s", lock_file);
2021 char hdb_lock_buffer[12];
2026 p = strrchr(dev, '/');
2032 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
2033 if (lock_file == NULL)
2035 novm("lock file name");
2038 strcpy (lock_file, LOCK_PREFIX);
2039 strcat (lock_file, dev);
2041 * Attempt to create the lock file at this point.
2045 fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644);
2050 sprintf (hdb_lock_buffer, "%010d\n", pid);
2051 write (fd, hdb_lock_buffer, 11);
2053 write(fd, &pid, sizeof (pid));
2059 * If the file exists then check to see if the pid is stale
2061 if (errno == EEXIST)
2063 fd = open(lock_file, O_RDONLY, 0);
2066 if (errno == ENOENT) /* This is just a timing problem. */
2073 /* Read the lock file to find out who has the device locked */
2074 n = read (fd, hdb_lock_buffer, 11);
2078 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
2082 /* See the process still exists. */
2086 hdb_lock_buffer[n] = '\0';
2087 sscanf (hdb_lock_buffer, " %d", &pid);
2089 pid = ((int *) hdb_lock_buffer)[0];
2091 if (pid == 0 || pid == getpid()
2092 || (kill(pid, 0) == -1 && errno == ESRCH))
2098 /* If the process does not exist then try to remove the lock */
2099 if (n == 0 && unlink (lock_file) == 0)
2101 syslog (LOG_NOTICE, "Removed stale lock on %s (pid %d)",
2106 syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid);
2110 syslog(LOG_ERR, "Can't create lock file %s: %m(%d)", lock_file, errno);
2121 /********************************************************************
2123 * unlock - remove our lockfile
2131 (void) rmlock (lock_file, (void *) 0);
2140 /********************************************************************
2142 * sifvjcomp - config tcp header compression
2145 int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
2147 u_int x = get_flags();
2151 if (ioctl (ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
2153 if (! ok_error (errno))
2155 syslog (LOG_ERR, "ioctl(PPPIOCSMAXCID): %m(%d)", errno);
2161 x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
2162 x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
2168 /********************************************************************
2170 * sifup - Config the interface up and enable IP packets to pass.
2177 memset (&ifr, '\0', sizeof (ifr));
2178 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2179 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
2181 if (! ok_error (errno))
2183 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
2188 ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
2189 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
2191 if (! ok_error (errno))
2193 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
2201 /********************************************************************
2203 * sifdown - Config the interface down and disable IP.
2212 memset (&ifr, '\0', sizeof (ifr));
2213 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2214 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
2216 if (! ok_error (errno))
2218 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
2223 ifr.ifr_flags &= ~IFF_UP;
2224 ifr.ifr_flags |= IFF_POINTOPOINT;
2225 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
2227 if (! ok_error (errno))
2229 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
2236 /********************************************************************
2238 * sifaddr - Config the interface IP addresses and netmask.
2241 int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
2247 memset (&ifr, '\0', sizeof (ifr));
2248 memset (&rt, '\0', sizeof (rt));
2250 SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
2251 SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
2252 SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
2254 strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2256 * Set our IP address
2258 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
2259 if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2261 if (errno != EEXIST)
2263 if (! ok_error (errno))
2265 syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m(%d)", errno);
2270 syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
2275 * Set the gateway address
2277 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
2278 if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0)
2280 if (! ok_error (errno))
2282 syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m(%d)", errno);
2288 * For recent kernels, force the netmask to 255.255.255.255.
2290 if (kernel_version >= KVERSION(2,1,16))
2294 ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
2295 if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0)
2297 if (! ok_error (errno))
2299 syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m(%d)", errno);
2305 * Add the device route
2307 if (kernel_version < KVERSION(2,1,16)) {
2308 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2309 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2312 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L;
2313 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
2314 rt.rt_flags = RTF_UP | RTF_HOST;
2316 if (kernel_version > KVERSION(2,1,0)) {
2317 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2318 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
2321 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0)
2323 if (! ok_error (errno))
2325 syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m(%d)", errno);
2333 /********************************************************************
2335 * cifaddr - Clear the interface IP addresses, and delete routes
2336 * through the interface if possible.
2339 int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
2343 if (kernel_version < KVERSION(2,1,16)) {
2345 * Delete the route through the device
2347 memset (&rt, '\0', sizeof (rt));
2349 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2350 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2353 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
2354 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
2355 rt.rt_flags = RTF_UP | RTF_HOST;
2357 if (kernel_version > KVERSION(2,1,0)) {
2358 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2359 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
2362 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
2364 if (still_ppp() && ! ok_error (errno))
2366 syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m(%d)", errno);
2374 /********************************************************************
2376 * open_loopback - open the device we use for getting packets
2377 * in demand mode. Under Linux, we use our existing fd
2378 * to the ppp driver.
2381 open_ppp_loopback(void)
2384 struct termios tios;
2387 for (i = 0; i < 64; ++i) {
2388 sprintf(loop_name, "/dev/pty%c%x", 'p' + i / 16, i % 16);
2389 master_fd = open(loop_name, O_RDWR | O_NOCTTY, 0);
2393 if (master_fd < 0) {
2394 syslog(LOG_ERR, "No free pty for loopback");
2397 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
2399 slave_fd = open(loop_name, O_RDWR | O_NOCTTY, 0);
2401 syslog(LOG_ERR, "Couldn't open %s for loopback: %m", loop_name);
2405 set_ppp_fd(slave_fd);
2407 if (tcgetattr(ppp_fd, &tios) == 0)
2409 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
2410 tios.c_cflag |= CS8 | CREAD;
2411 tios.c_iflag = IGNPAR | CLOCAL;
2414 if (tcsetattr(ppp_fd, TCSAFLUSH, &tios) < 0)
2416 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m(%d)", errno);
2420 flags = fcntl(master_fd, F_GETFL);
2422 fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2424 syslog(LOG_WARNING, "couldn't set master loopback to nonblock: %m(%d)", errno);
2427 flags = fcntl(ppp_fd, F_GETFL);
2429 fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2431 syslog(LOG_WARNING, "couldn't set slave loopback to nonblock: %m(%d)", errno);
2434 if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
2436 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
2440 * Find out which interface we were given.
2442 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
2444 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
2448 * Enable debug in the driver if requested.
2450 set_kdebugflag (kdebugflag);
2453 /********************************************************************
2455 * restore_loop - reattach the ppp unit to the loopback.
2457 * The kernel ppp driver automatically reattaches the ppp unit to
2458 * the loopback if the serial port is set to a line discipline other
2459 * than ppp, or if it detects a modem hangup. The former will happen
2460 * in disestablish_ppp if the latter hasn't already happened, so we
2461 * shouldn't need to do anything.
2463 * Just to be sure, set the real serial port to the normal discipline.
2469 if (ppp_fd != slave_fd)
2471 (void) ioctl(ppp_fd, TIOCSETD, &tty_disc);
2472 set_ppp_fd(slave_fd);
2476 /********************************************************************
2478 * sifnpmode - Set the mode for handling packets for a given NP.
2482 sifnpmode(u, proto, mode)
2489 npi.protocol = proto;
2491 if (ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0)
2493 if (! ok_error (errno))
2495 syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE, %d, %d): %m(%d)",
2496 proto, mode, errno);
2497 syslog(LOG_ERR, "ppp_fd=%d slave_fd=%d\n", ppp_fd, slave_fd);
2505 /********************************************************************
2507 * sipxfaddr - Config the interface IPX networknumber
2510 int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
2517 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2519 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2522 if (! ok_error (errno))
2524 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
2530 memset (&ifr, '\0', sizeof (ifr));
2531 strcpy (ifr.ifr_name, ifname);
2533 memcpy (sipx->sipx_node, node, IPX_NODE_LEN);
2534 sipx->sipx_family = AF_IPX;
2535 sipx->sipx_port = 0;
2536 sipx->sipx_network = htonl (network);
2537 sipx->sipx_type = IPX_FRAME_ETHERII;
2538 sipx->sipx_action = IPX_CRTITF;
2540 * Set the IPX device
2542 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2545 if (errno != EEXIST)
2547 if (! ok_error (errno))
2550 "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
2555 syslog (LOG_WARNING,
2556 "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
2565 /********************************************************************
2567 * cipxfaddr - Clear the information for the IPX network. The IPX routes
2568 * are removed and the device is no longer able to pass IPX
2572 int cipxfaddr (int unit)
2579 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2581 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2584 if (! ok_error (errno))
2586 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
2592 memset (&ifr, '\0', sizeof (ifr));
2593 strcpy (ifr.ifr_name, ifname);
2595 sipx->sipx_type = IPX_FRAME_ETHERII;
2596 sipx->sipx_action = IPX_DLTITF;
2597 sipx->sipx_family = AF_IPX;
2599 * Set the IPX device
2601 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2603 if (! ok_error (errno))
2606 "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
2617 * daemon - Detach us from controlling terminal session.
2620 daemon(nochdir, noclose)
2621 int nochdir, noclose;
2625 if ((pid = fork()) < 0)
2628 exit(0); /* parent dies */
2633 fclose(stdin); /* don't need stdin, stdout, stderr */
2641 * Use the hostname as part of the random number seed.
2650 for (p = hostname; *p != 0; ++p)
2655 /********************************************************************
2657 * sys_check_options - check the options that the user specified
2661 sys_check_options(void)
2664 struct stat stat_buf;
2666 * Disable the IPX protocol if the support is not present in the kernel.
2667 * If we disable it then ensure that IP support is enabled.
2669 while (ipxcp_protent.enabled_flag)
2671 if (path_to_procfs())
2673 strcat (route_buffer, "/net/ipx_interface");
2674 if (lstat (route_buffer, &stat_buf) >= 0)
2679 syslog (LOG_ERR, "IPX support is not present in the kernel\n");
2680 ipxcp_protent.enabled_flag = 0;
2681 ipcp_protent.enabled_flag = 1;
2685 if (demand && driver_is_old) {
2686 option_error("demand dialling is not supported by kernel driver version "
2687 "%d.%d.%d", driver_version, driver_modification,