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)
813 syslog(LOG_WARNING, "write: warning: %m(%d)", errno);
817 syslog(LOG_ERR, "write: %m(%d)", errno);
823 /********************************************************************
825 * wait_input - wait until there is data available on ppp_fd,
826 * for the length of time specified by *timo (indefinite
830 void wait_input (struct timeval *timo)
836 FD_SET(ppp_fd, &ready);
838 n = select(ppp_fd + 1, &ready, NULL, &ready, timo);
839 if (n < 0 && errno != EINTR)
841 syslog(LOG_ERR, "select: %m(%d)", errno);
846 /********************************************************************
848 * wait_loop_output - wait until there is data available on the
849 * loopback, for the length of time specified by *timo (indefinite
852 void wait_loop_output(timo)
853 struct timeval *timo;
859 FD_SET(master_fd, &ready);
860 n = select(master_fd + 1, &ready, NULL, &ready, timo);
861 if (n < 0 && errno != EINTR)
863 syslog(LOG_ERR, "select: %m(%d)", errno);
868 /********************************************************************
870 * wait_time - wait for a given length of time or until a
871 * signal is received.
875 struct timeval *timo;
879 n = select(0, NULL, NULL, NULL, timo);
880 if (n < 0 && errno != EINTR) {
881 syslog(LOG_ERR, "select: %m(%d)", errno);
886 /********************************************************************
888 * read_packet - get a PPP packet from the serial device.
891 int read_packet (unsigned char *buf)
895 len = read(ppp_fd, buf, PPP_MTU + PPP_HDRLEN);
898 if (errno == EWOULDBLOCK)
902 syslog(LOG_ERR, "read: %m(%d)", errno);
908 /********************************************************************
910 * get_loop_output - get outgoing packets from the ppp device,
911 * and detect when we want to bring the real link up.
912 * Return value is 1 if we need to bring up the link, 0 otherwise.
915 get_loop_output(void)
918 int n = read(master_fd, inbuf, sizeof(inbuf));
922 if (loop_chars(inbuf, n))
926 n = read(master_fd, inbuf, sizeof(inbuf));
931 syslog(LOG_ERR, "eof on loopback");
935 if (errno != EWOULDBLOCK)
937 syslog(LOG_ERR, "read from loopback: %m(%d)", errno);
944 /********************************************************************
946 * ppp_send_config - configure the transmit characteristics of
950 void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp)
955 SYSDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
957 * Ensure that the link is still up.
962 * Set the MTU and other parameters for the ppp device
964 memset (&ifr, '\0', sizeof (ifr));
965 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
968 if (ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
970 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m(%d)", errno);
974 SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
975 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
977 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m(%d)", errno);
982 x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
983 x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
988 /********************************************************************
990 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
993 void ppp_set_xaccm (int unit, ext_accm accm)
995 SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
996 accm[0], accm[1], accm[2], accm[3]));
998 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
1000 if ( ! ok_error (errno))
1002 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m(%d)", errno);
1007 /********************************************************************
1009 * ppp_recv_config - configure the receive-side characteristics of
1010 * the ppp interface.
1013 void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp)
1017 SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
1019 * If we were called because the link has gone down then there is nothing
1020 * which may be done. Just return without incident.
1027 * Set the receiver parameters
1029 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
1031 if ( ! ok_error (errno))
1033 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m(%d)", errno);
1037 SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
1038 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
1040 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno);
1045 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
1049 /********************************************************************
1051 * ccp_test - ask kernel whether a given compression method
1052 * is acceptable for use.
1055 int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
1057 struct ppp_option_data data;
1059 memset (&data, '\0', sizeof (data));
1061 data.length = opt_len;
1062 data.transmit = for_transmit;
1064 if (ioctl(ppp_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
1069 return (errno == ENOBUFS)? 0: -1;
1072 /********************************************************************
1074 * ccp_flags_set - inform kernel about the current state of CCP.
1077 void ccp_flags_set (int unit, int isopen, int isup)
1081 int x = get_flags();
1082 x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
1083 x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP;
1088 /********************************************************************
1090 * get_idle_time - return how long the link has been idle.
1093 get_idle_time(u, ip)
1095 struct ppp_idle *ip;
1097 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
1100 /********************************************************************
1102 * ccp_fatal_error - returns 1 if decompression was disabled as a
1103 * result of an error detected after decompression of a packet,
1104 * 0 otherwise. This is necessary because of patent nonsense.
1107 int ccp_fatal_error (int unit)
1109 int x = get_flags();
1111 return x & SC_DC_FERROR;
1115 * path_to_route - determine the path to the proc file system data
1117 #define ROUTE_MAX_COLS 12
1118 FILE *route_fd = (FILE *) 0;
1119 static char route_buffer [512];
1120 static int route_dev_col, route_dest_col, route_gw_col;
1121 static int route_flags_col, route_mask_col;
1122 static int route_num_cols;
1124 static char *path_to_route (void);
1125 static int open_route_table (void);
1126 static void close_route_table (void);
1127 static int read_route_table (struct rtentry *rt);
1129 /********************************************************************
1131 * path_to_procfs - find the path to the proc file system mount point
1134 static int path_to_procfs (void)
1136 struct mntent *mntent;
1139 fp = fopen(MOUNTED, "r");
1141 /* Default the mount location of /proc */
1142 strncpy (route_buffer, "/proc", sizeof (route_buffer)-10);
1146 while ((mntent = getmntent(fp)) != NULL) {
1147 if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0)
1149 if (strcmp(mntent->mnt_type, "proc") == 0)
1156 strncpy(route_buffer, mntent->mnt_dir, sizeof (route_buffer)-10);
1157 route_buffer [sizeof (route_buffer)-10] = '\0';
1161 /********************************************************************
1163 * path_to_route - find the path to the route tables in the proc file system
1166 static char *path_to_route (void)
1168 if (!path_to_procfs()) {
1169 syslog (LOG_ERR, "proc file system not mounted");
1172 strcat (route_buffer, "/net/route");
1173 return (route_buffer);
1176 /********************************************************************
1178 * close_route_table - close the interface to the route table
1181 static void close_route_table (void)
1183 if (route_fd != (FILE *) 0) {
1185 route_fd = (FILE *) 0;
1189 /********************************************************************
1191 * open_route_table - open the interface to the route table
1193 static char route_delims[] = " \t\n";
1195 static int open_route_table (void)
1199 close_route_table();
1201 path = path_to_route();
1205 route_fd = fopen (path, "r");
1206 if (route_fd == NULL) {
1207 syslog (LOG_ERR, "can't open %s: %m (%d)", path, errno);
1211 route_dev_col = 0; /* default to usual columns */
1214 route_flags_col = 3;
1218 /* parse header line */
1219 if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) {
1220 char *p = route_buffer, *q;
1222 for (col = 0; col < ROUTE_MAX_COLS; ++col) {
1224 if ((q = strtok(p, route_delims)) == 0)
1226 if (strcasecmp(q, "iface") == 0)
1227 route_dev_col = col;
1228 else if (strcasecmp(q, "destination") == 0)
1229 route_dest_col = col;
1230 else if (strcasecmp(q, "gateway") == 0)
1232 else if (strcasecmp(q, "flags") == 0)
1233 route_flags_col = col;
1234 else if (strcasecmp(q, "mask") == 0)
1235 route_mask_col = col;
1238 if (used && col >= route_num_cols)
1239 route_num_cols = col + 1;
1247 /********************************************************************
1249 * read_route_table - read the next entry from the route table
1252 static int read_route_table(struct rtentry *rt)
1254 char *cols[ROUTE_MAX_COLS], *p;
1257 memset (rt, '\0', sizeof (struct rtentry));
1259 if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
1263 for (col = 0; col < route_num_cols; ++col) {
1264 cols[col] = strtok(p, route_delims);
1265 if (cols[col] == NULL)
1266 return 0; /* didn't get enough columns */
1269 ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
1270 strtoul(cols[route_dest_col], NULL, 16);
1272 ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
1273 strtoul(cols[route_gw_col], NULL, 16);
1275 ((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr =
1276 strtoul(cols[route_mask_col], NULL, 16);
1278 rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
1279 rt->rt_dev = cols[route_dev_col];
1284 /********************************************************************
1286 * defaultroute_exists - determine if there is a default route
1289 static int defaultroute_exists (struct rtentry *rt)
1293 if (!open_route_table())
1296 while (read_route_table(rt) != 0) {
1297 if ((rt->rt_flags & RTF_UP) == 0)
1300 if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 0L) {
1306 close_route_table();
1311 * have_route_to - determine if the system has any route to
1312 * a given IP address.
1314 int have_route_to(u_int32_t addr)
1319 if (!open_route_table())
1320 return -1; /* don't know */
1322 while (read_route_table(&rt)) {
1323 if ((rt.rt_flags & RTF_UP) == 0)
1325 if ((addr & ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr)
1326 == ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr) {
1332 close_route_table();
1336 /********************************************************************
1338 * sifdefaultroute - assign a default route through the address given.
1341 int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1345 if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0)
1347 struct in_addr old_gateway =
1348 ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr;
1350 if (old_gateway.s_addr != gateway)
1353 "not replacing existing default route to %s [%s]",
1354 rt.rt_dev, inet_ntoa (old_gateway));
1359 memset (&rt, '\0', sizeof (rt));
1360 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1361 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1363 if (kernel_version > KVERSION(2,1,0)) {
1364 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1365 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
1368 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
1370 rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
1371 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0)
1373 if ( ! ok_error ( errno ))
1375 syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m(%d)", errno);
1380 default_route_gateway = gateway;
1384 /********************************************************************
1386 * cifdefaultroute - delete a default route through the address given.
1389 int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1393 default_route_gateway = 0;
1395 memset (&rt, '\0', sizeof (rt));
1396 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1397 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1399 if (kernel_version > KVERSION(2,1,0)) {
1400 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1401 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
1404 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
1406 rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
1407 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
1411 if ( ! ok_error ( errno ))
1414 "default route ioctl(SIOCDELRT): %m(%d)", errno);
1423 /********************************************************************
1425 * sifproxyarp - Make a proxy ARP entry for the peer.
1428 int sifproxyarp (int unit, u_int32_t his_adr)
1430 struct arpreq arpreq;
1432 if (has_proxy_arp == 0)
1434 memset (&arpreq, '\0', sizeof(arpreq));
1436 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1437 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
1438 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1440 * Get the hardware address of an interface on the same subnet
1441 * as our local address.
1443 if (!get_ether_addr(his_adr, &arpreq.arp_ha, arpreq.arp_dev))
1445 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1449 if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0)
1451 if ( ! ok_error ( errno ))
1453 syslog(LOG_ERR, "ioctl(SIOCSARP): %m(%d)", errno);
1459 proxy_arp_addr = his_adr;
1464 /********************************************************************
1466 * cifproxyarp - Delete the proxy ARP entry for the peer.
1469 int cifproxyarp (int unit, u_int32_t his_adr)
1471 struct arpreq arpreq;
1473 if (has_proxy_arp == 1)
1475 memset (&arpreq, '\0', sizeof(arpreq));
1476 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1477 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
1478 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1480 if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0)
1482 if ( ! ok_error ( errno ))
1484 syslog(LOG_WARNING, "ioctl(SIOCDARP): %m(%d)", errno);
1493 /********************************************************************
1495 * get_ether_addr - get the hardware address of an interface on the
1496 * the same subnet as ipaddr.
1499 static int get_ether_addr (u_int32_t ipaddr,
1500 struct sockaddr *hwaddr,
1503 struct ifreq *ifr, *ifend;
1504 u_int32_t ina, mask;
1507 struct ifreq ifs[MAX_IFS];
1509 ifc.ifc_len = sizeof(ifs);
1511 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
1513 if ( ! ok_error ( errno ))
1515 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m(%d)", errno);
1520 SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
1521 ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
1523 * Scan through looking for an interface with an Internet
1524 * address on the same subnet as `ipaddr'.
1526 ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
1527 for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
1529 if (ifr->ifr_addr.sa_family == AF_INET)
1531 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1532 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1533 SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
1536 * Check that the interface is up, and not point-to-point
1539 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1544 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1549 * Get its netmask and check that it's on the right subnet.
1551 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1556 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1557 SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
1558 ip_ntoa(ina), ntohl(mask)));
1560 if (((ipaddr ^ ina) & mask) != 0)
1573 memcpy (name, ifreq.ifr_name, sizeof(ifreq.ifr_name));
1574 syslog(LOG_INFO, "found interface %s for proxy arp", name);
1576 * Now get the hardware address.
1578 memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
1579 if (ioctl (sock_fd, SIOCGIFHWADDR, &ifreq) < 0)
1581 syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno);
1587 sizeof (struct sockaddr));
1589 SYSDEBUG ((LOG_DEBUG,
1590 "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1591 (int) ((unsigned char *) &hwaddr->sa_data)[0],
1592 (int) ((unsigned char *) &hwaddr->sa_data)[1],
1593 (int) ((unsigned char *) &hwaddr->sa_data)[2],
1594 (int) ((unsigned char *) &hwaddr->sa_data)[3],
1595 (int) ((unsigned char *) &hwaddr->sa_data)[4],
1596 (int) ((unsigned char *) &hwaddr->sa_data)[5],
1597 (int) ((unsigned char *) &hwaddr->sa_data)[6],
1598 (int) ((unsigned char *) &hwaddr->sa_data)[7]));
1602 /********************************************************************
1604 * Return user specified netmask, modified by any mask we might determine
1605 * for address `addr' (in network byte order).
1606 * Here we scan through the system's list of interfaces, looking for
1607 * any non-point-to-point interfaces which might appear to be on the same
1608 * network as `addr'. If we find any, we OR in their netmask to the
1609 * user-specified netmask.
1612 u_int32_t GetMask (u_int32_t addr)
1614 u_int32_t mask, nmask, ina;
1615 struct ifreq *ifr, *ifend, ifreq;
1617 struct ifreq ifs[MAX_IFS];
1621 if (IN_CLASSA(addr)) /* determine network mask for address class */
1623 nmask = IN_CLASSA_NET;
1627 if (IN_CLASSB(addr))
1629 nmask = IN_CLASSB_NET;
1633 nmask = IN_CLASSC_NET;
1637 /* class D nets are disallowed by bad_ip_adrs */
1638 mask = netmask | htonl(nmask);
1640 * Scan through the system's network interfaces.
1642 ifc.ifc_len = sizeof(ifs);
1644 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
1646 if ( ! ok_error ( errno ))
1648 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m(%d)", errno);
1653 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1654 for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
1657 * Check the interface's internet address.
1659 if (ifr->ifr_addr.sa_family != AF_INET)
1663 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1664 if (((ntohl(ina) ^ addr) & nmask) != 0)
1669 * Check that the interface is up, and not point-to-point nor loopback.
1671 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1672 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1677 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1682 * Get its netmask and OR it into our mask.
1684 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1688 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1694 /********************************************************************
1696 * Internal routine to decode the version.modification.patch level
1699 static void decode_version (char *buf, int *version,
1700 int *modification, int *patch)
1702 *version = (int) strtoul (buf, &buf, 10);
1709 *modification = (int) strtoul (buf, &buf, 10);
1713 *patch = (int) strtoul (buf, &buf, 10);
1725 /********************************************************************
1727 * Procedure to determine if the PPP line discipline is registered.
1731 ppp_registered(void)
1737 local_fd = open(devnam, O_NONBLOCK | O_RDWR, 0);
1740 syslog(LOG_ERR, "Failed to open %s: %m(%d)", devnam, errno);
1744 initfdflags = fcntl(local_fd, F_GETFL);
1745 if (initfdflags == -1)
1747 syslog(LOG_ERR, "Couldn't get device fd flags: %m(%d)", errno);
1752 initfdflags &= ~O_NONBLOCK;
1753 fcntl(local_fd, F_SETFL, initfdflags);
1755 * Read the initial line dicipline and try to put the device into the
1758 if (ioctl(local_fd, TIOCGETD, &init_disc) < 0)
1760 syslog(LOG_ERR, "ioctl(TIOCGETD): %m(%d)", errno);
1765 if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0)
1767 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
1772 if (ioctl(local_fd, TIOCSETD, &init_disc) < 0)
1774 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
1783 /********************************************************************
1785 * ppp_available - check whether the system has any ppp interfaces
1786 * (in fact we check whether we can do an ioctl on ppp0).
1789 int ppp_available(void)
1794 int my_version, my_modification, my_patch;
1795 extern char *no_ppp_msg;
1797 * Open a socket for doing the ioctl operations.
1799 s = socket(AF_INET, SOCK_DGRAM, 0);
1805 strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
1806 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
1808 * If the device did not exist then attempt to create one by putting the
1809 * current tty into the PPP discipline. If this works then obtain the
1810 * flags for the device again.
1814 if (ppp_registered())
1816 strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
1817 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
1821 * Ensure that the hardware address is for PPP and not something else
1825 ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
1828 if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
1836 "This system lacks kernel support for PPP. This could be because\n"
1837 "the PPP kernel module is not loaded, or because the kernel is\n"
1838 "not configured for PPP. See the README.linux file in the\n"
1839 "ppp-2.3.5 distribution.\n";
1842 * This is the PPP device. Validate the version of the driver at this
1843 * point to ensure that this program will work with the driver.
1847 char abBuffer [1024];
1849 ifr.ifr_data = abBuffer;
1850 size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
1852 syslog(LOG_ERR, "Couldn't read driver version: %m");
1854 no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
1857 decode_version(abBuffer,
1859 &driver_modification,
1862 * Validate the version of the driver against the version that we used.
1864 decode_version(VERSION,
1869 /* The version numbers must match */
1870 if (driver_version != my_version)
1875 /* The modification levels must be legal */
1876 if (driver_modification < 3)
1878 if (driver_modification >= 2) {
1879 /* we can cope with 2.2.0 and above */
1889 sprintf (route_buffer,
1890 "Sorry - PPP driver version %d.%d.%d is out of date\n",
1891 driver_version, driver_modification, driver_patch);
1893 no_ppp_msg = route_buffer;
1900 /********************************************************************
1902 * Update the wtmp file with the appropriate user name and tty device.
1905 void logwtmp (const char *line, const char *name, const char *host)
1908 struct utmp ut, *utp;
1909 pid_t mypid = getpid();
1911 * Update the signon database for users.
1912 * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
1914 utmpname(_PATH_UTMP);
1916 while ((utp = getutent()) && (utp->ut_pid != mypid))
1919 /* Is this call really necessary? There is another one after the 'put' */
1924 memcpy(&ut, utp, sizeof(ut));
1928 /* some gettys/telnetds don't initialize utmp... */
1929 memset(&ut, 0, sizeof(ut));
1932 if (ut.ut_id[0] == 0)
1934 strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
1937 strncpy(ut.ut_user, name, sizeof(ut.ut_user));
1938 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1942 ut.ut_type = USER_PROCESS;
1945 /* Insert the host name if one is supplied */
1948 strncpy (ut.ut_host, host, sizeof(ut.ut_host));
1951 /* Insert the IP address of the remote system if IP is enabled */
1952 if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
1954 memcpy (&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
1955 sizeof(ut.ut_addr));
1958 /* CL: Makes sure that the logout works */
1959 if (*host == 0 && *name==0)
1967 * Update the wtmp file.
1969 wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
1972 flock(wtmp, LOCK_EX);
1974 /* we really should check for error on the write for a full disk! */
1975 write (wtmp, (char *)&ut, sizeof(ut));
1978 flock(wtmp, LOCK_UN);
1982 /********************************************************************
1983 * Code for locking/unlocking the serial device.
1984 * This code is derived from chat.c.
1988 * lock - create a lock file for the named device
1991 int lock (char *dev)
1995 lock_file = malloc(strlen(dev) + 1);
1996 if (lock_file == NULL)
1998 novm("lock file name");
2000 strcpy (lock_file, dev);
2001 result = mklock (dev, (void *) 0);
2005 syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, result);
2014 syslog (LOG_ERR, "Can't create lock file %s", lock_file);
2022 char hdb_lock_buffer[12];
2027 p = strrchr(dev, '/');
2033 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
2034 if (lock_file == NULL)
2036 novm("lock file name");
2039 strcpy (lock_file, LOCK_PREFIX);
2040 strcat (lock_file, dev);
2042 * Attempt to create the lock file at this point.
2046 fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644);
2051 sprintf (hdb_lock_buffer, "%010d\n", pid);
2052 write (fd, hdb_lock_buffer, 11);
2054 write(fd, &pid, sizeof (pid));
2060 * If the file exists then check to see if the pid is stale
2062 if (errno == EEXIST)
2064 fd = open(lock_file, O_RDONLY, 0);
2067 if (errno == ENOENT) /* This is just a timing problem. */
2074 /* Read the lock file to find out who has the device locked */
2075 n = read (fd, hdb_lock_buffer, 11);
2079 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
2083 /* See the process still exists. */
2087 hdb_lock_buffer[n] = '\0';
2088 sscanf (hdb_lock_buffer, " %d", &pid);
2090 pid = ((int *) hdb_lock_buffer)[0];
2092 if (pid == 0 || pid == getpid()
2093 || (kill(pid, 0) == -1 && errno == ESRCH))
2099 /* If the process does not exist then try to remove the lock */
2100 if (n == 0 && unlink (lock_file) == 0)
2102 syslog (LOG_NOTICE, "Removed stale lock on %s (pid %d)",
2107 syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid);
2111 syslog(LOG_ERR, "Can't create lock file %s: %m(%d)", lock_file, errno);
2122 /********************************************************************
2124 * unlock - remove our lockfile
2132 (void) rmlock (lock_file, (void *) 0);
2141 /********************************************************************
2143 * sifvjcomp - config tcp header compression
2146 int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
2148 u_int x = get_flags();
2152 if (ioctl (ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
2154 if (! ok_error (errno))
2156 syslog (LOG_ERR, "ioctl(PPPIOCSMAXCID): %m(%d)", errno);
2162 x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
2163 x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
2169 /********************************************************************
2171 * sifup - Config the interface up and enable IP packets to pass.
2178 memset (&ifr, '\0', sizeof (ifr));
2179 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2180 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
2182 if (! ok_error (errno))
2184 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
2189 ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
2190 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
2192 if (! ok_error (errno))
2194 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
2202 /********************************************************************
2204 * sifdown - Config the interface down and disable IP.
2213 memset (&ifr, '\0', sizeof (ifr));
2214 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2215 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
2217 if (! ok_error (errno))
2219 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
2224 ifr.ifr_flags &= ~IFF_UP;
2225 ifr.ifr_flags |= IFF_POINTOPOINT;
2226 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
2228 if (! ok_error (errno))
2230 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
2237 /********************************************************************
2239 * sifaddr - Config the interface IP addresses and netmask.
2242 int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
2248 memset (&ifr, '\0', sizeof (ifr));
2249 memset (&rt, '\0', sizeof (rt));
2251 SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
2252 SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
2253 SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
2255 strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2257 * Set our IP address
2259 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
2260 if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2262 if (errno != EEXIST)
2264 if (! ok_error (errno))
2266 syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m(%d)", errno);
2271 syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
2276 * Set the gateway address
2278 ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
2279 if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0)
2281 if (! ok_error (errno))
2283 syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m(%d)", errno);
2289 * For recent kernels, force the netmask to 255.255.255.255.
2291 if (kernel_version >= KVERSION(2,1,16))
2295 ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
2296 if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0)
2298 if (! ok_error (errno))
2300 syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m(%d)", errno);
2306 * Add the device route
2308 if (kernel_version < KVERSION(2,1,16)) {
2309 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2310 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2313 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L;
2314 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
2315 rt.rt_flags = RTF_UP | RTF_HOST;
2317 if (kernel_version > KVERSION(2,1,0)) {
2318 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2319 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
2322 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0)
2324 if (! ok_error (errno))
2326 syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m(%d)", errno);
2334 /********************************************************************
2336 * cifaddr - Clear the interface IP addresses, and delete routes
2337 * through the interface if possible.
2340 int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
2344 if (kernel_version < KVERSION(2,1,16)) {
2346 * Delete the route through the device
2348 memset (&rt, '\0', sizeof (rt));
2350 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2351 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2354 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
2355 ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
2356 rt.rt_flags = RTF_UP | RTF_HOST;
2358 if (kernel_version > KVERSION(2,1,0)) {
2359 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2360 ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
2363 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
2365 if (still_ppp() && ! ok_error (errno))
2367 syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m(%d)", errno);
2375 /********************************************************************
2377 * open_loopback - open the device we use for getting packets
2378 * in demand mode. Under Linux, we use our existing fd
2379 * to the ppp driver.
2382 open_ppp_loopback(void)
2385 struct termios tios;
2388 for (i = 0; i < 64; ++i) {
2389 sprintf(loop_name, "/dev/pty%c%x", 'p' + i / 16, i % 16);
2390 master_fd = open(loop_name, O_RDWR | O_NOCTTY, 0);
2394 if (master_fd < 0) {
2395 syslog(LOG_ERR, "No free pty for loopback");
2398 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
2400 slave_fd = open(loop_name, O_RDWR | O_NOCTTY, 0);
2402 syslog(LOG_ERR, "Couldn't open %s for loopback: %m", loop_name);
2406 set_ppp_fd(slave_fd);
2408 if (tcgetattr(ppp_fd, &tios) == 0)
2410 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
2411 tios.c_cflag |= CS8 | CREAD;
2412 tios.c_iflag = IGNPAR | CLOCAL;
2415 if (tcsetattr(ppp_fd, TCSAFLUSH, &tios) < 0)
2417 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m(%d)", errno);
2421 flags = fcntl(master_fd, F_GETFL);
2423 fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2425 syslog(LOG_WARNING, "couldn't set master loopback to nonblock: %m(%d)", errno);
2428 flags = fcntl(ppp_fd, F_GETFL);
2430 fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2432 syslog(LOG_WARNING, "couldn't set slave loopback to nonblock: %m(%d)", errno);
2435 if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
2437 syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
2441 * Find out which interface we were given.
2443 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
2445 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
2449 * Enable debug in the driver if requested.
2451 set_kdebugflag (kdebugflag);
2454 /********************************************************************
2456 * restore_loop - reattach the ppp unit to the loopback.
2458 * The kernel ppp driver automatically reattaches the ppp unit to
2459 * the loopback if the serial port is set to a line discipline other
2460 * than ppp, or if it detects a modem hangup. The former will happen
2461 * in disestablish_ppp if the latter hasn't already happened, so we
2462 * shouldn't need to do anything.
2464 * Just to be sure, set the real serial port to the normal discipline.
2470 if (ppp_fd != slave_fd)
2472 (void) ioctl(ppp_fd, TIOCSETD, &tty_disc);
2473 set_ppp_fd(slave_fd);
2477 /********************************************************************
2479 * sifnpmode - Set the mode for handling packets for a given NP.
2483 sifnpmode(u, proto, mode)
2490 npi.protocol = proto;
2492 if (ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0)
2494 if (! ok_error (errno))
2496 syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE, %d, %d): %m(%d)",
2497 proto, mode, errno);
2498 syslog(LOG_ERR, "ppp_fd=%d slave_fd=%d\n", ppp_fd, slave_fd);
2506 /********************************************************************
2508 * sipxfaddr - Config the interface IPX networknumber
2511 int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
2518 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2520 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2523 if (! ok_error (errno))
2525 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
2531 memset (&ifr, '\0', sizeof (ifr));
2532 strcpy (ifr.ifr_name, ifname);
2534 memcpy (sipx->sipx_node, node, IPX_NODE_LEN);
2535 sipx->sipx_family = AF_IPX;
2536 sipx->sipx_port = 0;
2537 sipx->sipx_network = htonl (network);
2538 sipx->sipx_type = IPX_FRAME_ETHERII;
2539 sipx->sipx_action = IPX_CRTITF;
2541 * Set the IPX device
2543 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2546 if (errno != EEXIST)
2548 if (! ok_error (errno))
2551 "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
2556 syslog (LOG_WARNING,
2557 "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
2566 /********************************************************************
2568 * cipxfaddr - Clear the information for the IPX network. The IPX routes
2569 * are removed and the device is no longer able to pass IPX
2573 int cipxfaddr (int unit)
2580 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2582 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2585 if (! ok_error (errno))
2587 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
2593 memset (&ifr, '\0', sizeof (ifr));
2594 strcpy (ifr.ifr_name, ifname);
2596 sipx->sipx_type = IPX_FRAME_ETHERII;
2597 sipx->sipx_action = IPX_DLTITF;
2598 sipx->sipx_family = AF_IPX;
2600 * Set the IPX device
2602 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
2604 if (! ok_error (errno))
2607 "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
2618 * daemon - Detach us from controlling terminal session.
2621 daemon(nochdir, noclose)
2622 int nochdir, noclose;
2626 if ((pid = fork()) < 0)
2629 exit(0); /* parent dies */
2634 fclose(stdin); /* don't need stdin, stdout, stderr */
2642 * Use the hostname as part of the random number seed.
2651 for (p = hostname; *p != 0; ++p)
2656 /********************************************************************
2658 * sys_check_options - check the options that the user specified
2662 sys_check_options(void)
2665 struct stat stat_buf;
2667 * Disable the IPX protocol if the support is not present in the kernel.
2668 * If we disable it then ensure that IP support is enabled.
2670 while (ipxcp_protent.enabled_flag)
2672 if (path_to_procfs())
2674 strcat (route_buffer, "/net/ipx_interface");
2675 if (lstat (route_buffer, &stat_buf) >= 0)
2680 syslog (LOG_ERR, "IPX support is not present in the kernel\n");
2681 ipxcp_protent.enabled_flag = 0;
2682 ipcp_protent.enabled_flag = 1;
2686 if (demand && driver_is_old) {
2687 option_error("demand dialling is not supported by kernel driver version "
2688 "%d.%d.%d", driver_version, driver_modification,