X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-linux.c;h=26cadc6e7c797778ca45ca5d80b6eed8f8489b5b;hp=34830f06ba0a11e94433b814397e00dd553071b5;hb=7977da267649fee17261d0d163a12863f3534b57;hpb=416f33f79891785c39465e6b3f1010ee92fb78aa diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c index 34830f0..26cadc6 100644 --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c @@ -2,24 +2,71 @@ * sys-linux.c - System-dependent procedures for setting up * PPP interfaces on Linux systems * - * Copyright (c) 1989 Carnegie Mellon University. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by Carnegie Mellon University. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* - * TODO: + * Copyright (c) 1994-2004 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 3. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * ". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Derived from main.c and pppd.h, which are: + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include @@ -27,6 +74,10 @@ #include #include #include +#include +#include +#include +#include #include #include @@ -38,34 +89,158 @@ #include #include #include +#include +#include +#include +/* This is in netdevice.h. However, this compile will fail miserably if + you attempt to include netdevice.h because it has so many references + to __memcpy functions which it should not attempt to do. So, since I + really don't use it, but it must be defined, define it now. */ + +#ifndef MAX_ADDR_LEN +#define MAX_ADDR_LEN 7 +#endif + +#if __GLIBC__ >= 2 +#include /* glibc 2 conflicts with linux/types.h */ #include -#include #include -#include -#include +#include +#include +#else +#include +#include +#include +#include #include +#endif #include +#include + +#include +#include #include "pppd.h" #include "fsm.h" #include "ipcp.h" -static int initdisc = -1; /* Initial TTY discipline */ -static int prev_kdebugflag = 0; +#ifdef IPX_CHANGE +#include "ipxcp.h" +#if __GLIBC__ >= 2 && \ + !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0) +#include +#else +#include +#endif +#endif /* IPX_CHANGE */ + +#ifdef PPP_FILTER +#include +#include +#endif /* PPP_FILTER */ -static int restore_term; /* 1 => we've munged the terminal */ -static struct termios inittermios; /* Initial TTY termios */ +#ifdef LOCKLIB +#include +#endif + +#ifdef INET6 +#ifndef _LINUX_IN6_H +/* + * This is in linux/include/net/ipv6.h. + */ + +struct in6_ifreq { + struct in6_addr ifr6_addr; + __u32 ifr6_prefixlen; + unsigned int ifr6_ifindex; +}; +#endif + +#define IN6_LLADDR_FROM_EUI64(sin6, eui64) do { \ + memset(&sin6.s6_addr, 0, sizeof(struct in6_addr)); \ + sin6.s6_addr16[0] = htons(0xfe80); \ + eui64_copy(eui64, sin6.s6_addr32[2]); \ + } while (0) -int sockfd; /* socket for doing interface ioctls */ +#endif /* INET6 */ -static int driver_version = 0; +/* We can get an EIO error on an ioctl if the modem has hung up */ +#define ok_error(num) ((num)==EIO) + +static int tty_disc = N_TTY; /* The TTY discipline */ +static int ppp_disc = N_PPP; /* The PPP discpline */ +static int initfdflags = -1; /* Initial file descriptor flags for fd */ +static int ppp_fd = -1; /* fd which is set to PPP discipline */ +static int sock_fd = -1; /* socket for doing interface ioctls */ +static int slave_fd = -1; +static int master_fd = -1; +#ifdef INET6 +static int sock6_fd = -1; +#endif /* INET6 */ + +/* + * For the old-style kernel driver, this is the same as ppp_fd. + * For the new-style driver, it is the fd of an instance of /dev/ppp + * which is attached to the ppp unit and is used for controlling it. + */ +int ppp_dev_fd = -1; /* fd for /dev/ppp (new style driver) */ + +static int chindex; /* channel index (new style driver) */ + +static fd_set in_fds; /* set of fds that wait_input waits for */ +static int max_in_fd; /* highest fd set in in_fds */ + +static int has_proxy_arp = 0; +static int driver_version = 0; static int driver_modification = 0; -static int driver_patch = 0; +static int driver_patch = 0; +static int driver_is_old = 0; +static int restore_term = 0; /* 1 => we've munged the terminal */ +static struct termios inittermios; /* Initial TTY termios */ -static char *lock_file; +int new_style_driver = 0; + +static char loop_name[20]; +static unsigned char inbuf[512]; /* buffer for chars read from loopback */ + +static int if_is_up; /* Interface has been marked up */ +static u_int32_t default_route_gateway; /* Gateway for default route added */ +static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */ +static char proxy_arp_dev[16]; /* Device for proxy arp entry */ +static u_int32_t our_old_addr; /* for detecting address changes */ +static int dynaddr_set; /* 1 if ip_dynaddr set */ +static int looped; /* 1 if using loop */ +static int link_mtu; /* mtu for the link (not bundle) */ + +static struct utsname utsname; /* for the kernel version */ +static int kernel_version; +#define KVERSION(j,n,p) ((j)*1000000 + (n)*1000 + (p)) + +#define MAX_IFS 100 + +#define FLAGS_GOOD (IFF_UP | IFF_BROADCAST) +#define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \ + IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP) + +#define SIN_ADDR(x) (((struct sockaddr_in *) (&(x)))->sin_addr.s_addr) + +/* Prototypes for procedures local to this file. */ +static int modify_flags(int fd, int clear_bits, int set_bits); +static int translate_speed (int bps); +static int baud_rate_of (int speed); +static void close_route_table (void); +static int open_route_table (void); +static int read_route_table (struct rtentry *rt); +static int defaultroute_exists (struct rtentry *rt); +static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr, + char *name, int namelen); +static void decode_version (char *buf, int *version, int *mod, int *patch); +static int set_kdebugflag(int level); +static int ppp_registered(void); +static int make_ppp_unit(void); -#define MAX_IFS 32 +extern u_char inpacket_buf[]; /* borrowed from main.c */ /* * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, @@ -77,140 +252,516 @@ static char *lock_file; addr.sa_family = (family); /* + * Determine if the PPP connection should still be present. + */ + +extern int hungup; + +/* new_fd is the fd of a tty */ +static void set_ppp_fd (int new_fd) +{ + SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd)); + ppp_fd = new_fd; + if (!new_style_driver) + ppp_dev_fd = new_fd; +} + +static int still_ppp(void) +{ + if (new_style_driver) + return !hungup && ppp_fd >= 0; + if (!hungup || ppp_fd == slave_fd) + return 1; + if (slave_fd >= 0) { + set_ppp_fd(slave_fd); + return 1; + } + return 0; +} + +/* + * modify_flags - set and clear flag bits controlling the kernel + * PPP driver. + */ +static int modify_flags(int fd, int clear_bits, int set_bits) +{ + int flags; + + if (ioctl(fd, PPPIOCGFLAGS, &flags) == -1) + goto err; + flags = (flags & ~clear_bits) | set_bits; + if (ioctl(fd, PPPIOCSFLAGS, &flags) == -1) + goto err; + + return 0; + + err: + if (errno != EIO) + error("Failed to set PPP kernel option flags: %m"); + return -1; +} + +/******************************************************************** + * * sys_init - System-dependent initialization. */ void sys_init(void) { - openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP); - setlogmask(LOG_UPTO(LOG_INFO)); - if (debug) - setlogmask(LOG_UPTO(LOG_DEBUG)); + /* Get an internet socket for doing socket ioctls. */ + sock_fd = socket(AF_INET, SOCK_DGRAM, 0); + if (sock_fd < 0) + fatal("Couldn't create IP socket: %m(%d)", errno); + +#ifdef INET6 + sock6_fd = socket(AF_INET6, SOCK_DGRAM, 0); + if (sock6_fd < 0) + sock6_fd = -errno; /* save errno for later */ +#endif - /* Get an internet socket for doing socket ioctl's on. */ - if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - syslog(LOG_ERR, "Couldn't create IP socket: %m"); - die(1); - } + FD_ZERO(&in_fds); + max_in_fd = 0; } -/* - * note_debug_level - note a change in the debug level. +/******************************************************************** + * + * sys_cleanup - restore any system state we modified before exiting: + * mark the interface down, delete default route and/or proxy arp entry. + * This shouldn't call die() because it's called from die(). */ -void note_debug_level (void) + +void sys_cleanup(void) { - if (debug) { - syslog(LOG_INFO, "Debug turned ON, Level %d", debug); - setlogmask(LOG_UPTO(LOG_DEBUG)); - } else { - setlogmask(LOG_UPTO(LOG_WARNING)); +/* + * Take down the device + */ + if (if_is_up) { + if_is_up = 0; + sifdown(0); } +/* + * Delete any routes through the device. + */ + if (default_route_gateway != 0) + cifdefaultroute(0, 0, default_route_gateway); + + if (has_proxy_arp) + cifproxyarp(0, proxy_arp_addr); } -/* +/******************************************************************** + * + * sys_close - Clean up in a child process before execing. + */ +void +sys_close(void) +{ + if (new_style_driver && ppp_dev_fd >= 0) + close(ppp_dev_fd); + if (sock_fd >= 0) + close(sock_fd); +#ifdef INET6 + if (sock6_fd >= 0) + close(sock6_fd); +#endif + if (slave_fd >= 0) + close(slave_fd); + if (master_fd >= 0) + close(master_fd); +} + +/******************************************************************** + * * set_kdebugflag - Define the debugging level for the kernel */ -int set_kdebugflag (int requested_level) +static int set_kdebugflag (int requested_level) { - if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m"); + if (ppp_dev_fd < 0) + return 1; + if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) { + if ( ! ok_error (errno) ) + error("ioctl(PPPIOCSDEBUG): %m (line %d)", __LINE__); return (0); } - - if (prev_kdebugflag != requested_level) { - if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) { - syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m"); - return (0); - } - syslog(LOG_INFO, "set kernel debugging level to %d", requested_level); - } + SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d", + requested_level)); return (1); } -/* - * establish_ppp - Turn the serial port into a ppp interface. +/******************************************************************** + * + * tty_establish_ppp - Turn the serial port into a ppp interface. */ -void establish_ppp (void) +int tty_establish_ppp (int tty_fd) { - int pppdisc = N_PPP; - int sig = SIGIO; + int ret_fd; + +/* + * Ensure that the tty device is in exclusive mode. + */ + if (ioctl(tty_fd, TIOCEXCL, 0) < 0) { + if ( ! ok_error ( errno )) + warn("Couldn't make tty exclusive: %m"); + } +/* + * Demand mode - prime the old ppp device to relinquish the unit. + */ + if (!new_style_driver && looped + && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0) { + error("ioctl(transfer ppp unit): %m, line %d", __LINE__); + return -1; + } +/* + * Set the current tty to the PPP discpline + */ + +#ifndef N_SYNC_PPP +#define N_SYNC_PPP 14 +#endif + ppp_disc = (new_style_driver && sync_serial)? N_SYNC_PPP: N_PPP; + if (ioctl(tty_fd, TIOCSETD, &ppp_disc) < 0) { + if ( ! ok_error (errno) ) { + error("Couldn't set tty to PPP discipline: %m"); + return -1; + } + } + + ret_fd = generic_establish_ppp(tty_fd); - if (ioctl(fd, TIOCEXCL, 0) < 0) { - syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m"); +#define SC_RCVB (SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP) +#define SC_LOGB (SC_DEBUG | SC_LOG_INPKT | SC_LOG_OUTPKT | SC_LOG_RAWIN \ + | SC_LOG_FLUSH) + + if (ret_fd >= 0) { + modify_flags(ppp_fd, SC_RCVB | SC_LOGB, + (kdebugflag * SC_DEBUG) & SC_LOGB); + } else { + if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0 && !ok_error(errno)) + warn("Couldn't reset tty to normal line discipline: %m"); } - if (ioctl(fd, TIOCGETD, &initdisc) < 0) { - syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); - die (1); + return ret_fd; +} + +/******************************************************************** + * + * generic_establish_ppp - Turn the fd into a ppp interface. + */ +int generic_establish_ppp (int fd) +{ + int x; + + if (new_style_driver) { + int flags; + + /* Open an instance of /dev/ppp and connect the channel to it */ + if (ioctl(fd, PPPIOCGCHAN, &chindex) == -1) { + error("Couldn't get channel number: %m"); + goto err; + } + dbglog("using channel %d", chindex); + fd = open("/dev/ppp", O_RDWR); + if (fd < 0) { + error("Couldn't reopen /dev/ppp: %m"); + goto err; + } + (void) fcntl(fd, F_SETFD, FD_CLOEXEC); + if (ioctl(fd, PPPIOCATTCHAN, &chindex) < 0) { + error("Couldn't attach to channel %d: %m", chindex); + goto err_close; + } + flags = fcntl(fd, F_GETFL); + if (flags == -1 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) + warn("Couldn't set /dev/ppp (channel) to nonblock: %m"); + set_ppp_fd(fd); + + if (!looped) + ifunit = -1; + if (!looped && !multilink) { + /* + * Create a new PPP unit. + */ + if (make_ppp_unit() < 0) + goto err_close; + } + + if (looped) + modify_flags(ppp_dev_fd, SC_LOOP_TRAFFIC, 0); + + if (!multilink) { + add_fd(ppp_dev_fd); + if (ioctl(fd, PPPIOCCONNECT, &ifunit) < 0) { + error("Couldn't attach to PPP unit %d: %m", ifunit); + goto err_close; + } + } + + } else { + /* + * Old-style driver: find out which interface we were given. + */ + set_ppp_fd (fd); + if (ioctl(fd, PPPIOCGUNIT, &x) < 0) { + if (ok_error (errno)) + goto err; + fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__); + } + /* Check that we got the same unit again. */ + if (looped && x != ifunit) + fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x); + ifunit = x; + + /* + * Fetch the initial file flags and reset blocking mode on the file. + */ + initfdflags = fcntl(fd, F_GETFL); + if (initfdflags == -1 || + fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { + if ( ! ok_error (errno)) + warn("Couldn't set device to non-blocking mode: %m"); + } } - - if (ioctl(fd, TIOCSETD, &pppdisc) < 0) { - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); - die (1); + + /* + * Enable debug in the driver if requested. + */ + if (!looped) + set_kdebugflag (kdebugflag); + + looped = 0; + + SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver", + driver_version, driver_modification, driver_patch)); + + return ppp_fd; + + err_close: + close(fd); + err: + return -1; +} + +/******************************************************************** + * + * tty_disestablish_ppp - Restore the serial port to normal operation. + * This shouldn't call die() because it's called from die(). + */ + +void tty_disestablish_ppp(int tty_fd) +{ + if (!hungup) { +/* + * Flush the tty output buffer so that the TIOCSETD doesn't hang. + */ + if (tcflush(tty_fd, TCIOFLUSH) < 0) + { + warn("tcflush failed: %m"); + goto flushfailed; + } +/* + * Restore the previous line discipline + */ + if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) { + if ( ! ok_error (errno)) + error("ioctl(TIOCSETD, N_TTY): %m (line %d)", __LINE__); + } + + if (ioctl(tty_fd, TIOCNXCL, 0) < 0) { + if ( ! ok_error (errno)) + warn("ioctl(TIOCNXCL): %m (line %d)", __LINE__); + } + + /* Reset non-blocking mode on fd. */ + if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0) { + if ( ! ok_error (errno)) + warn("Couldn't restore device fd flags: %m"); + } } - if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m"); - die (1); +flushfailed: + initfdflags = -1; + + generic_disestablish_ppp(tty_fd); +} + +/******************************************************************** + * + * generic_disestablish_ppp - Restore device components to normal + * operation, and reconnect the ppp unit to the loopback if in demand + * mode. This shouldn't call die() because it's called from die(). + */ +void generic_disestablish_ppp(int dev_fd) +{ + if (new_style_driver) { + close(ppp_fd); + ppp_fd = -1; + if (demand) { + modify_flags(ppp_dev_fd, 0, SC_LOOP_TRAFFIC); + looped = 1; + } else if (ppp_dev_fd >= 0) { + close(ppp_dev_fd); + remove_fd(ppp_dev_fd); + ppp_dev_fd = -1; + } + } else { + /* old-style driver */ + if (demand) + set_ppp_fd(slave_fd); + else + ppp_dev_fd = -1; } +} - set_kdebugflag (kdebugflag); +/* + * make_ppp_unit - make a new ppp unit for ppp_dev_fd. + * Assumes new_style_driver. + */ +static int make_ppp_unit() +{ + int x, flags; - syslog (LOG_NOTICE, "Using version %d.%d.%d of PPP driver", - driver_version, driver_modification, driver_patch); + if (ppp_dev_fd >= 0) { + dbglog("in make_ppp_unit, already had /dev/ppp open?"); + close(ppp_dev_fd); + } + ppp_dev_fd = open("/dev/ppp", O_RDWR); + if (ppp_dev_fd < 0) + fatal("Couldn't open /dev/ppp: %m"); + flags = fcntl(ppp_dev_fd, F_GETFL); + if (flags == -1 + || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1) + warn("Couldn't set /dev/ppp to nonblock: %m"); + + ifunit = req_unit; + x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit); + if (x < 0 && req_unit >= 0 && errno == EEXIST) { + warn("Couldn't allocate PPP unit %d as it is already in use", req_unit); + ifunit = -1; + x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit); + } + if (x < 0) + error("Couldn't create new ppp unit: %m"); + return x; } /* - * disestablish_ppp - Restore the serial port to normal operation. - * This shouldn't call die() because it's called from die(). + * cfg_bundle - configure the existing bundle. + * Used in demand mode. + */ +void cfg_bundle(int mrru, int mtru, int rssn, int tssn) +{ + if (!new_style_driver) + return; + + /* set the mrru, mtu and flags */ + if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0) + error("Couldn't set MRRU: %m"); + + modify_flags(ppp_dev_fd, SC_MP_SHORTSEQ|SC_MP_XSHORTSEQ|SC_MULTILINK, + ((rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0) + | (mrru? SC_MULTILINK: 0))); + + /* connect up the channel */ + if (ioctl(ppp_fd, PPPIOCCONNECT, &ifunit) < 0) + fatal("Couldn't attach to PPP unit %d: %m", ifunit); + add_fd(ppp_dev_fd); +} + +/* + * make_new_bundle - create a new PPP unit (i.e. a bundle) + * and connect our channel to it. This should only get called + * if `multilink' was set at the time establish_ppp was called. + * In demand mode this uses our existing bundle instead of making + * a new one. + */ +void make_new_bundle(int mrru, int mtru, int rssn, int tssn) +{ + if (!new_style_driver) + return; + + /* make us a ppp unit */ + if (make_ppp_unit() < 0) + die(1); + + /* set the mrru and flags */ + cfg_bundle(mrru, mtru, rssn, tssn); +} + +/* + * bundle_attach - attach our link to a given PPP unit. + * We assume the unit is controlled by another pppd. */ +int bundle_attach(int ifnum) +{ + int master_fd; + + if (!new_style_driver) + return -1; + + master_fd = open("/dev/ppp", O_RDWR); + if (master_fd < 0) + fatal("Couldn't open /dev/ppp: %m"); + if (ioctl(master_fd, PPPIOCATTACH, &ifnum) < 0) { + if (errno == ENXIO) { + close(master_fd); + return 0; /* doesn't still exist */ + } + fatal("Couldn't attach to interface unit %d: %m\n", ifnum); + } + if (ioctl(ppp_fd, PPPIOCCONNECT, &ifnum) < 0) + fatal("Couldn't connect to interface unit %d: %m", ifnum); + modify_flags(master_fd, 0, SC_MULTILINK); + close(master_fd); + + ifunit = ifnum; + return 1; +} -void disestablish_ppp(void) +/******************************************************************** + * + * clean_check - Fetch the flags for the device and generate + * appropriate error messages. + */ +void clean_check(void) { int x; char *s; - if (initdisc >= 0) { - set_kdebugflag (prev_kdebugflag); - /* - * Check whether the link seems not to be 8-bit clean. - */ - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { + if (still_ppp()) { + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { s = NULL; switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { case SC_RCV_B7_0: - s = "bit 7 set to 1"; + s = "all had bit 7 set to 1"; break; + case SC_RCV_B7_1: - s = "bit 7 set to 0"; + s = "all had bit 7 set to 0"; break; + case SC_RCV_EVNP: - s = "odd parity"; + s = "all had odd parity"; break; + case SC_RCV_ODDP: - s = "even parity"; + s = "all had even parity"; break; } + if (s != NULL) { - syslog(LOG_WARNING, "Serial link is not 8-bit clean:"); - syslog(LOG_WARNING, "All received characters had %s", s); + warn("Receive serial link is not 8-bit clean:"); + warn("Problem: %s", s); } } - - if (ioctl(fd, TIOCSETD, &initdisc) < 0) - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); - - if (ioctl(fd, TIOCNXCL, 0) < 0) - syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m"); - - initdisc = -1; } } + /* * List of valid speeds. */ + struct speed { int speed_int, speed_val; } speeds[] = { @@ -268,80 +819,94 @@ struct speed { #ifdef B38400 { 38400, B38400 }, #endif +#ifdef B57600 + { 57600, B57600 }, +#endif +#ifdef B76800 + { 76800, B76800 }, +#endif +#ifdef B115200 + { 115200, B115200 }, +#endif #ifdef EXTA { 19200, EXTA }, #endif #ifdef EXTB { 38400, EXTB }, #endif -#ifdef B57600 - { 57600, B57600 }, +#ifdef B230400 + { 230400, B230400 }, #endif -#ifdef B115200 - { 115200, B115200 }, +#ifdef B460800 + { 460800, B460800 }, +#endif +#ifdef B921600 + { 921600, B921600 }, #endif { 0, 0 } }; -/* +/******************************************************************** + * * Translate from bits/second to a speed_t. */ -int translate_speed (int bps) + +static int translate_speed (int bps) { struct speed *speedp; - if (bps == 0) - return 0; - for (speedp = speeds; speedp->speed_int; speedp++) - if (bps == speedp->speed_int) - return speedp->speed_val; - syslog(LOG_WARNING, "speed %d not supported", bps); + if (bps != 0) { + for (speedp = speeds; speedp->speed_int; speedp++) { + if (bps == speedp->speed_int) + return speedp->speed_val; + } + warn("speed %d not supported", bps); + } return 0; } -/* +/******************************************************************** + * * Translate from a speed_t to bits/second. */ -int baud_rate_of (int speed) + +static int baud_rate_of (int speed) { struct speed *speedp; - if (speed == 0) - return 0; - for (speedp = speeds; speedp->speed_int; speedp++) - if (speed == speedp->speed_val) - return speedp->speed_int; + if (speed != 0) { + for (speedp = speeds; speedp->speed_int; speedp++) { + if (speed == speedp->speed_val) + return speedp->speed_int; + } + } return 0; } -/* +/******************************************************************** + * * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity, * at the requested speed, etc. If `local' is true, set CLOCAL * regardless of whether the modem option was specified. */ -void set_up_tty (int fd, int local) + +void set_up_tty(int tty_fd, int local) { - int speed, x; + int speed; struct termios tios; - if (tcgetattr(fd, &tios) < 0) { - syslog(LOG_ERR, "tcgetattr: %m"); - die(1); + setdtr(tty_fd, 1); + if (tcgetattr(tty_fd, &tios) < 0) { + if (!ok_error(errno)) + fatal("tcgetattr: %m (line %d)", __LINE__); + return; } if (!restore_term) inittermios = tios; - tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); - if (crtscts == 1) - tios.c_cflag |= CRTSCTS; - else if (crtscts < 0) - tios.c_cflag &= ~CRTSCTS; - - tios.c_cflag |= CS8 | CREAD | HUPCL; - - if (local || !modem) - tios.c_cflag |= CLOCAL; + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); + tios.c_cflag |= CS8 | CREAD | HUPCL; tios.c_iflag = IGNBRK | IGNPAR; tios.c_oflag = 0; @@ -349,805 +914,960 @@ void set_up_tty (int fd, int local) tios.c_cc[VMIN] = 1; tios.c_cc[VTIME] = 0; - if (crtscts == 2) { - tios.c_iflag |= IXOFF; + if (local || !modem) + tios.c_cflag ^= (CLOCAL | HUPCL); + + switch (crtscts) { + case 1: + tios.c_cflag |= CRTSCTS; + break; + + case -2: + tios.c_iflag |= IXON | IXOFF; tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ + break; + + case -1: + tios.c_cflag &= ~CRTSCTS; + break; + + default: + break; } speed = translate_speed(inspeed); if (speed) { - cfsetospeed(&tios, speed); - cfsetispeed(&tios, speed); - } else { - speed = cfgetospeed(&tios); - /* - * We can't proceed if the serial port speed is B0, - * since that implies that the serial port is disabled. - */ - if (speed == B0) { - syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate", - devnam); - die(1); - } + cfsetospeed (&tios, speed); + cfsetispeed (&tios, speed); } - - if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { - syslog(LOG_ERR, "tcsetattr: %m"); - die(1); +/* + * We can't proceed if the serial port speed is B0, + * since that implies that the serial port is disabled. + */ + else { + speed = cfgetospeed(&tios); + if (speed == B0) + fatal("Baud rate for %s is 0; need explicit baud rate", devnam); } - baud_rate = baud_rate_of(speed); - restore_term = TRUE; + while (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0 && !ok_error(errno)) + if (errno != EINTR) + fatal("tcsetattr: %m (line %d)", __LINE__); + + baud_rate = baud_rate_of(speed); + restore_term = 1; } -/* +/******************************************************************** + * * setdtr - control the DTR line on the serial port. * This is called from die(), so it shouldn't call die(). */ -void setdtr (int fd, int on) + +void setdtr (int tty_fd, int on) { int modembits = TIOCM_DTR; - ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); + ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits); } -/* +/******************************************************************** + * * restore_tty - restore the terminal to the saved settings. */ -void restore_tty (void) +void restore_tty (int tty_fd) { if (restore_term) { - if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) - if (errno != ENXIO) - syslog(LOG_WARNING, "tcsetattr: %m"); restore_term = 0; +/* + * Turn off echoing, because otherwise we can get into + * a loop with the tty and the modem echoing to each other. + * We presume we are the sole user of this tty device, so + * when we close it, it will revert to its defaults anyway. + */ + if (!default_device) + inittermios.c_lflag &= ~(ECHO | ECHONL); + + if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) { + if (! ok_error (errno)) + warn("tcsetattr: %m (line %d)", __LINE__); + } } } -/* +/******************************************************************** + * * output - Output PPP packet. */ void output (int unit, unsigned char *p, int len) { - if (unit != 0) - MAINDEBUG((LOG_WARNING, "output: unit != 0!")); - - if (debug) - log_packet(p, len, "sent "); - + int fd = ppp_fd; + int proto; + + dump_packet("sent", p, len); + if (snoop_send_hook) snoop_send_hook(p, len); + + if (len < PPP_HDRLEN) + return; + if (new_style_driver) { + p += 2; + len -= 2; + proto = (p[0] << 8) + p[1]; + if (ppp_dev_fd >= 0 && !(proto >= 0xc000 || proto == PPP_CCPFRAG)) + fd = ppp_dev_fd; + } if (write(fd, p, len) < 0) { - syslog(LOG_ERR, "write: %m"); - die(1); + if (errno == EWOULDBLOCK || errno == EAGAIN || errno == ENOBUFS + || errno == ENXIO || errno == EIO || errno == EINTR) + warn("write: warning: %m (%d)", errno); + else + error("write: %m (%d)", errno); } } -/* - * wait_input - wait until there is data available on fd, +/******************************************************************** + * + * wait_input - wait until there is data available, * for the length of time specified by *timo (indefinite * if timo is NULL). */ -void wait_input (struct timeval *timo) + +void wait_input(struct timeval *timo) { - fd_set ready; + fd_set ready, exc; int n; - FD_ZERO(&ready); - FD_SET(fd, &ready); - n = select(fd+1, &ready, NULL, &ready, timo); - if (n < 0 && errno != EINTR) { - syslog(LOG_ERR, "select: %m"); - die(1); - } + ready = in_fds; + exc = in_fds; + n = select(max_in_fd + 1, &ready, NULL, &exc, timo); + if (n < 0 && errno != EINTR) + fatal("select: %m"); +} + +/* + * add_fd - add an fd to the set that wait_input waits for. + */ +void add_fd(int fd) +{ + if (fd >= FD_SETSIZE) + fatal("internal error: file descriptor too large (%d)", fd); + FD_SET(fd, &in_fds); + if (fd > max_in_fd) + max_in_fd = fd; } /* + * remove_fd - remove an fd from the set that wait_input waits for. + */ +void remove_fd(int fd) +{ + FD_CLR(fd, &in_fds); +} + + +/******************************************************************** + * * read_packet - get a PPP packet from the serial device. */ int read_packet (unsigned char *buf) { - int len; - - len = read(fd, buf, PPP_MTU + PPP_HDRLEN); - if (len < 0) { - if (errno == EWOULDBLOCK) { - return -1; - } - syslog(LOG_ERR, "read(fd): %m"); - die(1); + int len, nr; + + len = PPP_MRU + PPP_HDRLEN; + if (new_style_driver) { + *buf++ = PPP_ALLSTATIONS; + *buf++ = PPP_UI; + len -= 2; + } + nr = -1; + if (ppp_fd >= 0) { + nr = read(ppp_fd, buf, len); + if (nr < 0 && errno != EWOULDBLOCK && errno != EAGAIN + && errno != EIO && errno != EINTR) + error("read: %m"); + if (nr < 0 && errno == ENXIO) + return 0; + } + if (nr < 0 && new_style_driver && ppp_dev_fd >= 0) { + /* N.B. we read ppp_fd first since LCP packets come in there. */ + nr = read(ppp_dev_fd, buf, len); + if (nr < 0 && errno != EWOULDBLOCK && errno != EAGAIN + && errno != EIO && errno != EINTR) + error("read /dev/ppp: %m"); + if (nr < 0 && errno == ENXIO) + return 0; } - return len; + return (new_style_driver && nr > 0)? nr+2: nr; } -/* - * ppp_send_config - configure the transmit characteristics of - * the ppp interface. +/******************************************************************** + * + * get_loop_output - get outgoing packets from the ppp device, + * and detect when we want to bring the real link up. + * Return value is 1 if we need to bring up the link, 0 otherwise. */ -void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp) +int +get_loop_output(void) { - u_int x; - struct ifreq ifr; - - MAINDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu)); - strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - ifr.ifr_mtu = mtu; - if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) { - syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m"); - quit(); - } + int rv = 0; + int n; - MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m"); - quit(); - } - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - quit(); + if (new_style_driver) { + while ((n = read_packet(inpacket_buf)) > 0) + if (loop_frame(inpacket_buf, n)) + rv = 1; + return rv; } - x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT; - x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC; + while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0) + if (loop_chars(inbuf, n)) + rv = 1; - MAINDEBUG ((LOG_DEBUG, "send_config: flags = %x\n", x)); - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - quit(); - } + if (n == 0) + fatal("eof on loopback"); + + if (errno != EWOULDBLOCK && errno != EAGAIN) + fatal("read from loopback: %m(%d)", errno); + + return rv; } /* - * ppp_set_xaccm - set the extended transmit ACCM for the interface. + * netif_set_mtu - set the MTU on the PPP network interface. */ -void ppp_set_xaccm (int unit, ext_accm accm) +void +netif_set_mtu(int unit, int mtu) { - MAINDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n", - accm[0], accm[1], accm[2], accm[3])); - if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) - syslog(LOG_WARNING, "ioctl(set extended ACCM): %m"); + struct ifreq ifr; + + SYSDEBUG ((LOG_DEBUG, "netif_set_mtu: mtu = %d\n", mtu)); + + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + ifr.ifr_mtu = mtu; + + if (ifunit >= 0 && ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0) + error("ioctl(SIOCSIFMTU): %m (line %d)", __LINE__); } /* - * ppp_recv_config - configure the receive-side characteristics of - * the ppp interface. + * netif_get_mtu - get the MTU on the PPP network interface. */ -void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp) +int +netif_get_mtu(int unit) { - u_int x; - - MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru)); - if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) - syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m"); + struct ifreq ifr; - MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m"); - quit(); - } - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - quit(); - } + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; - MAINDEBUG ((LOG_DEBUG, "recv_config: flags = %x\n", x)); - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - quit(); + if (ifunit >= 0 && ioctl(sock_fd, SIOCGIFMTU, (caddr_t) &ifr) < 0) { + error("ioctl(SIOCGIFMTU): %m (line %d)", __LINE__); + return 0; } + return ifr.ifr_mtu; } -/* - * ccp_test - ask kernel whether a given compression method - * is acceptable for use. +/******************************************************************** + * + * tty_send_config - configure the transmit characteristics of + * the ppp interface. */ -int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit) - { - struct ppp_option_data data; - data.ptr = opt_ptr; - data.length = opt_len; - data.transmit = for_transmit; +void tty_send_config(int mtu, u_int32_t asyncmap, int pcomp, int accomp) +{ + int x; + + if (!still_ppp()) + return; + link_mtu = mtu; + if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (errno != EIO && errno != ENOTTY) + error("Couldn't set transmit async character map: %m"); + ++error_count; + return; + } - return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0; - } + x = (pcomp? SC_COMP_PROT: 0) | (accomp? SC_COMP_AC: 0) + | (sync_serial? SC_SYNC: 0); + modify_flags(ppp_fd, SC_COMP_PROT|SC_COMP_AC|SC_SYNC, x); +} -/* - * ccp_flags_set - inform kernel about the current state of CCP. +/******************************************************************** + * + * tty_set_xaccm - set the extended transmit ACCM for the interface. */ -void ccp_flags_set (int unit, int isopen, int isup) - { - int x; +void tty_set_xaccm (ext_accm accm) +{ + SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n", + accm[0], accm[1], accm[2], accm[3])); - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - } - else - { - x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN; - x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP; + if (!still_ppp()) + return; + if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) { + if ( ! ok_error (errno)) + warn("ioctl(set extended ACCM): %m (line %d)", __LINE__); + } +} - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - } - } - } +/******************************************************************** + * + * tty_recv_config - configure the receive-side characteristics of + * the ppp interface. + */ +void tty_recv_config(int mru, u_int32_t asyncmap, int pcomp, int accomp) +{ /* - * ccp_fatal_error - returns 1 if decompression was disabled as a - * result of an error detected after decompression of a packet, - * 0 otherwise. This is necessary because of patent nonsense. + * If we were called because the link has gone down then there is nothing + * which may be done. Just return without incident. */ - -int ccp_fatal_error (int unit) - { - int x; - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); - return 0; - } - return x & SC_DC_FERROR; - } - + if (!still_ppp()) + return; /* - * sifvjcomp - config tcp header compression + * Set the receiver parameters */ + if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) { + if (errno != EIO && errno != ENOTTY) + error("Couldn't set channel receive MRU: %m"); + } + if (new_style_driver && ppp_dev_fd >= 0 + && ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) + error("Couldn't set MRU in generic PPP layer: %m"); -int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) - { - u_int x; + if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (errno != EIO && errno != ENOTTY) + error("Couldn't set channel receive asyncmap: %m"); + } +} - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - return 0; - } +/******************************************************************** + * + * ccp_test - ask kernel whether a given compression method + * is acceptable for use. + */ - x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP; - x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID; +int +ccp_test(int unit, u_char *opt_ptr, int opt_len, int for_transmit) +{ + struct ppp_option_data data; - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - return 0; - } + memset (&data, '\0', sizeof (data)); + data.ptr = opt_ptr; + data.length = opt_len; + data.transmit = for_transmit; - if (vjcomp) - { - if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) - { - syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - return 0; - } - } + if (ioctl(ppp_dev_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) + return 1; - return 1; - } + return (errno == ENOBUFS)? 0: -1; +} -/* - * sifup - Config the interface up and enable IP packets to pass. +/******************************************************************** + * + * ccp_flags_set - inform kernel about the current state of CCP. */ -int sifup (int u) - { - struct ifreq ifr; - - strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m"); - return 0; - } +void ccp_flags_set (int unit, int isopen, int isup) +{ + int x; - ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT); - if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); - return 0; - } - return 1; - } + x = (isopen? SC_CCP_OPEN: 0) | (isup? SC_CCP_UP: 0); + if (still_ppp() && ppp_dev_fd >= 0) + modify_flags(ppp_dev_fd, SC_CCP_OPEN|SC_CCP_UP, x); +} +#ifdef PPP_FILTER /* - * sifdown - Config the interface down and disable IP. + * set_filters - set the active and pass filters in the kernel driver. */ +int set_filters(struct bpf_program *pass, struct bpf_program *active) +{ + struct sock_fprog fp; + + fp.len = pass->bf_len; + fp.filter = (struct sock_filter *) pass->bf_insns; + if (ioctl(ppp_dev_fd, PPPIOCSPASS, &fp) < 0) { + if (errno == ENOTTY) + warn("kernel does not support PPP filtering"); + else + error("Couldn't set pass-filter in kernel: %m"); + return 0; + } + fp.len = active->bf_len; + fp.filter = (struct sock_filter *) active->bf_insns; + if (ioctl(ppp_dev_fd, PPPIOCSACTIVE, &fp) < 0) { + error("Couldn't set active-filter in kernel: %m"); + return 0; + } + return 1; +} +#endif /* PPP_FILTER */ -int sifdown (int u) - { - struct ifreq ifr; - - strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m"); - return 0; - } - - ifr.ifr_flags &= ~IFF_UP; - ifr.ifr_flags |= IFF_POINTOPOINT; - if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); - return 0; - } - return 1; - } - -/* - * sifaddr - Config the interface IP addresses and netmask. +/******************************************************************** + * + * get_idle_time - return how long the link has been idle. */ +int +get_idle_time(u, ip) + int u; + struct ppp_idle *ip; +{ + return ioctl(ppp_dev_fd, PPPIOCGIDLE, ip) >= 0; +} -int sifaddr (int unit, int our_adr, int his_adr, int net_mask) - { - struct ifreq ifr; - struct rtentry rt; - - SET_SA_FAMILY (ifr.ifr_addr, AF_INET); - SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET); - SET_SA_FAMILY (ifr.ifr_netmask, AF_INET); - - strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); -/* - * Set our IP address - */ - ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr; - if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) - { - if (errno != EEXIST) - { - syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m"); - } - else - { - syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists"); - } - return (0); - } -/* - * Set the gateway address - */ - ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr; - if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) - { - syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m"); - return (0); - } -/* - * Set the netmask - */ - if (net_mask != 0) - { - ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask; - if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) - { - syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m"); - return (0); - } - } -/* - * Add the device route +/******************************************************************** + * + * get_ppp_stats - return statistics for the link. */ - memset (&rt, '\0', sizeof (rt)); - - SET_SA_FAMILY (rt.rt_dst, AF_INET); - SET_SA_FAMILY (rt.rt_gateway, AF_INET); - rt.rt_dev = ifname; /* MJC */ +int +get_ppp_stats(u, stats) + int u; + struct pppd_stats *stats; +{ + struct ifpppstatsreq req; - ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0; - ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; - rt.rt_flags = RTF_UP | RTF_HOST; + memset (&req, 0, sizeof (req)); - if (ioctl(sockfd, SIOCADDRT, &rt) < 0) - { - syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m"); - return (0); - } + req.stats_ptr = (caddr_t) &req.stats; + strlcpy(req.ifr__name, ifname, sizeof(req.ifr__name)); + if (ioctl(sock_fd, SIOCGPPPSTATS, &req) < 0) { + error("Couldn't get PPP statistics: %m"); + return 0; + } + stats->bytes_in = req.stats.p.ppp_ibytes; + stats->bytes_out = req.stats.p.ppp_obytes; + stats->pkts_in = req.stats.p.ppp_ipackets; + stats->pkts_out = req.stats.p.ppp_opackets; return 1; - } +} -/* - * cifaddr - Clear the interface IP addresses, and delete routes - * through the interface if possible. +/******************************************************************** + * + * ccp_fatal_error - returns 1 if decompression was disabled as a + * result of an error detected after decompression of a packet, + * 0 otherwise. This is necessary because of patent nonsense. */ -int cifaddr (int unit, int our_adr, int his_adr) - { - struct rtentry rt; -/* - * Delete the route through the device +int ccp_fatal_error (int unit) +{ + int flags; + + if (ioctl(ppp_dev_fd, PPPIOCGFLAGS, &flags) < 0) { + error("Couldn't read compression error flags: %m"); + flags = 0; + } + return flags & SC_DC_FERROR; +} + +/******************************************************************** + * + * path_to_procfs - find the path to the proc file system mount point */ - memset (&rt, '\0', sizeof (rt)); +static char proc_path[MAXPATHLEN]; +static int proc_path_len; - SET_SA_FAMILY (rt.rt_dst, AF_INET); - SET_SA_FAMILY (rt.rt_gateway, AF_INET); - rt.rt_dev = ifname; /* MJC */ +static char *path_to_procfs(const char *tail) +{ + struct mntent *mntent; + FILE *fp; - ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0; - ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; - rt.rt_flags = RTF_UP | RTF_HOST; + if (proc_path_len == 0) { + /* Default the mount location of /proc */ + strlcpy (proc_path, "/proc", sizeof(proc_path)); + proc_path_len = 5; + fp = fopen(MOUNTED, "r"); + if (fp != NULL) { + while ((mntent = getmntent(fp)) != NULL) { + if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0) + continue; + if (strcmp(mntent->mnt_type, "proc") == 0) { + strlcpy(proc_path, mntent->mnt_dir, sizeof(proc_path)); + proc_path_len = strlen(proc_path); + break; + } + } + fclose (fp); + } + } - if (ioctl(sockfd, SIOCDELRT, &rt) < 0) - { - syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m"); - return (0); - } - return 1; - } + strlcpy(proc_path + proc_path_len, tail, + sizeof(proc_path) - proc_path_len); + return proc_path; +} /* - * path_to_route - determine the path to the proc file system data + * /proc/net/route parsing stuff. */ - +#define ROUTE_MAX_COLS 12 FILE *route_fd = (FILE *) 0; -static char route_buffer [100]; +static char route_buffer[512]; +static int route_dev_col, route_dest_col, route_gw_col; +static int route_flags_col, route_mask_col; +static int route_num_cols; -static char *path_to_route (void); static int open_route_table (void); static void close_route_table (void); static int read_route_table (struct rtentry *rt); -static int defaultroute_exists (void); -/* - * path_to_route - find the path to the route tables in the proc file system +/******************************************************************** + * + * close_route_table - close the interface to the route table */ -static char *path_to_route (void) - { - struct mntent *mntent; - FILE *fp; - - fp = fopen (MOUNTED, "r"); - if (fp != 0) - { - while ((mntent = getmntent (fp)) != 0) - { - if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) == 0) - { - continue; - } - - if (strcmp (mntent->mnt_type, "proc") == 0) - { - strncpy (route_buffer, mntent->mnt_dir, - sizeof (route_buffer)-10); - route_buffer [sizeof (route_buffer)-10] = '\0'; - strcat (route_buffer, "/net/route"); - - fclose (fp); - return (route_buffer); - } - } - fclose (fp); - } - syslog (LOG_ERR, "proc file system not mounted"); - return 0; - } +static void close_route_table (void) +{ + if (route_fd != (FILE *) 0) { + fclose (route_fd); + route_fd = (FILE *) 0; + } +} -/* +/******************************************************************** + * * open_route_table - open the interface to the route table */ +static char route_delims[] = " \t\n"; static int open_route_table (void) - { +{ char *path; - if (route_fd != (FILE *) 0) - { - close_route_table(); - } - - path = path_to_route(); - if (path == NULL) - { - return 0; - } + close_route_table(); + path = path_to_procfs("/net/route"); route_fd = fopen (path, "r"); - if (route_fd == (FILE *) 0) - { - syslog (LOG_ERR, "can not open %s: %m", path); - return 0; - } - - /* read and discard the header line. */ - if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) - { - close_route_table(); + if (route_fd == NULL) { + error("can't open routing table %s: %m", path); return 0; - } - return 1; - } + } -/* - * close_route_table - close the interface to the route table - */ + route_dev_col = 0; /* default to usual columns */ + route_dest_col = 1; + route_gw_col = 2; + route_flags_col = 3; + route_mask_col = 7; + route_num_cols = 8; + + /* parse header line */ + if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) { + char *p = route_buffer, *q; + int col; + for (col = 0; col < ROUTE_MAX_COLS; ++col) { + int used = 1; + if ((q = strtok(p, route_delims)) == 0) + break; + if (strcasecmp(q, "iface") == 0) + route_dev_col = col; + else if (strcasecmp(q, "destination") == 0) + route_dest_col = col; + else if (strcasecmp(q, "gateway") == 0) + route_gw_col = col; + else if (strcasecmp(q, "flags") == 0) + route_flags_col = col; + else if (strcasecmp(q, "mask") == 0) + route_mask_col = col; + else + used = 0; + if (used && col >= route_num_cols) + route_num_cols = col + 1; + p = NULL; + } + } -static void close_route_table (void) - { - if (route_fd != (FILE *) 0) - { - fclose (route_fd); - route_fd = (FILE *) 0; - } - } + return 1; +} -/* +/******************************************************************** + * * read_route_table - read the next entry from the route table */ -static int read_route_table (struct rtentry *rt) - { - static char delims[] = " \t\n"; - char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr; - - if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) - { - return 0; - } +static int read_route_table(struct rtentry *rt) +{ + char *cols[ROUTE_MAX_COLS], *p; + int col; memset (rt, '\0', sizeof (struct rtentry)); - dev_ptr = strtok (route_buffer, delims); /* interface name */ - dst_ptr = strtok (NULL, delims); /* destination address */ - gw_ptr = strtok (NULL, delims); /* gateway */ - flag_ptr = strtok (NULL, delims); /* flags */ + if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) + return 0; - ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr = - strtoul (dst_ptr, NULL, 16); + p = route_buffer; + for (col = 0; col < route_num_cols; ++col) { + cols[col] = strtok(p, route_delims); + if (cols[col] == NULL) + return 0; /* didn't get enough columns */ + p = NULL; + } - ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr = - strtoul (gw_ptr, NULL, 16); + SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16); + SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16); + SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16); - rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16); - rt->rt_dev = dev_ptr; + rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16); + rt->rt_dev = cols[route_dev_col]; return 1; - } +} -/* +/******************************************************************** + * * defaultroute_exists - determine if there is a default route */ -static int defaultroute_exists (void) - { - struct rtentry rt; - int result = 0; +static int defaultroute_exists (struct rtentry *rt) +{ + int result = 0; if (!open_route_table()) - { - return 0; - } + return 0; - while (read_route_table(&rt) != 0) - { - if (rt.rt_flags & RTF_UP == 0) - { + while (read_route_table(rt) != 0) { + if ((rt->rt_flags & RTF_UP) == 0) continue; - } - - if (((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr == 0L) - { - syslog (LOG_ERR, - "ppp not replacing existing default route to %s[%s]", - rt.rt_dev, - inet_ntoa (((struct sockaddr_in *) &rt.rt_gateway)-> - sin_addr.s_addr)); - result = 1; + + if (kernel_version > KVERSION(2,1,0) && SIN_ADDR(rt->rt_genmask) != 0) + continue; + if (SIN_ADDR(rt->rt_dst) == 0L) { + result = 1; break; - } - } + } + } + close_route_table(); return result; - } +} /* + * have_route_to - determine if the system has any route to + * a given IP address. `addr' is in network byte order. + * Return value is 1 if yes, 0 if no, -1 if don't know. + * For demand mode to work properly, we have to ignore routes + * through our own interface. + */ +int have_route_to(u_int32_t addr) +{ + struct rtentry rt; + int result = 0; + + if (!open_route_table()) + return -1; /* don't know */ + + while (read_route_table(&rt)) { + if ((rt.rt_flags & RTF_UP) == 0 || strcmp(rt.rt_dev, ifname) == 0) + continue; + if ((addr & SIN_ADDR(rt.rt_genmask)) == SIN_ADDR(rt.rt_dst)) { + result = 1; + break; + } + } + + close_route_table(); + return result; +} + +/******************************************************************** + * * sifdefaultroute - assign a default route through the address given. */ -int sifdefaultroute (int unit, int gateway) - { +int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) +{ struct rtentry rt; - if (defaultroute_exists()) - { - return 0; - } + if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) { + u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway); + + if (old_gateway != gateway) + error("not replacing existing default route to %s [%I]", + rt.rt_dev, old_gateway); + return 0; + } memset (&rt, '\0', sizeof (rt)); SET_SA_FAMILY (rt.rt_dst, AF_INET); SET_SA_FAMILY (rt.rt_gateway, AF_INET); - ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; - + + rt.rt_dev = ifname; + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + SIN_ADDR(rt.rt_genmask) = 0L; + } + + SIN_ADDR(rt.rt_gateway) = gateway; + rt.rt_flags = RTF_UP | RTF_GATEWAY; - if (ioctl(sockfd, SIOCADDRT, &rt) < 0) - { - syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m"); + if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCADDRT): %m"); return 0; - } + } + + default_route_gateway = gateway; return 1; - } +} -/* +/******************************************************************** + * * cifdefaultroute - delete a default route through the address given. */ -int cifdefaultroute (int unit, int gateway) - { +int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway) +{ struct rtentry rt; - + + default_route_gateway = 0; + + memset (&rt, '\0', sizeof (rt)); SET_SA_FAMILY (rt.rt_dst, AF_INET); SET_SA_FAMILY (rt.rt_gateway, AF_INET); - ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; - + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + SIN_ADDR(rt.rt_genmask) = 0L; + } + + SIN_ADDR(rt.rt_gateway) = gateway; + rt.rt_flags = RTF_UP | RTF_GATEWAY; - if (ioctl(sockfd, SIOCDELRT, &rt) < 0) - { - syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m"); - return 0; - } + if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) { + if (still_ppp()) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCDELRT): %m"); + return 0; + } + } + return 1; - } +} -/* +/******************************************************************** + * * sifproxyarp - Make a proxy ARP entry for the peer. */ int sifproxyarp (int unit, u_int32_t his_adr) - { +{ struct arpreq arpreq; + char *forw_path; + + if (has_proxy_arp == 0) { + memset (&arpreq, '\0', sizeof(arpreq)); - memset (&arpreq, '\0', sizeof(arpreq)); + SET_SA_FAMILY(arpreq.arp_pa, AF_INET); + SIN_ADDR(arpreq.arp_pa) = his_adr; + arpreq.arp_flags = ATF_PERM | ATF_PUBL; /* * Get the hardware address of an interface on the same subnet * as our local address. */ - if (!get_ether_addr(his_adr, &arpreq.arp_ha)) - { - syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP"); - return 0; - } - - SET_SA_FAMILY(arpreq.arp_pa, AF_INET); - ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr; - arpreq.arp_flags = ATF_PERM | ATF_PUBL; - - if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCSARP): %m"); - return 0; - } + if (!get_ether_addr(his_adr, &arpreq.arp_ha, proxy_arp_dev, + sizeof(proxy_arp_dev))) { + error("Cannot determine ethernet address for proxy ARP"); + return 0; + } + strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev)); + + if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0) { + if ( ! ok_error ( errno )) + error("ioctl(SIOCSARP): %m"); + return 0; + } + proxy_arp_addr = his_adr; + has_proxy_arp = 1; + + if (tune_kernel) { + forw_path = path_to_procfs("/sys/net/ipv4/ip_forward"); + if (forw_path != 0) { + int fd = open(forw_path, O_WRONLY); + if (fd >= 0) { + if (write(fd, "1", 1) != 1) + error("Couldn't enable IP forwarding: %m"); + close(fd); + } + } + } + } + return 1; - } +} -/* +/******************************************************************** + * * cifproxyarp - Delete the proxy ARP entry for the peer. */ int cifproxyarp (int unit, u_int32_t his_adr) - { +{ struct arpreq arpreq; - - memset (&arpreq, '\0', sizeof(arpreq)); - SET_SA_FAMILY(arpreq.arp_pa, AF_INET); - - ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr; - if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) - { - syslog(LOG_WARNING, "ioctl(SIOCDARP): %m"); - return 0; - } + + if (has_proxy_arp) { + has_proxy_arp = 0; + memset (&arpreq, '\0', sizeof(arpreq)); + SET_SA_FAMILY(arpreq.arp_pa, AF_INET); + SIN_ADDR(arpreq.arp_pa) = his_adr; + arpreq.arp_flags = ATF_PERM | ATF_PUBL; + strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev)); + + if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0) { + if ( ! ok_error ( errno )) + warn("ioctl(SIOCDARP): %m"); + return 0; + } + } return 1; - } - -/* +} + +/******************************************************************** + * * get_ether_addr - get the hardware address of an interface on the * the same subnet as ipaddr. */ -int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) - { - struct ifreq *ifr, *ifend, *ifp; - int i; +static int get_ether_addr (u_int32_t ipaddr, + struct sockaddr *hwaddr, + char *name, int namelen) +{ + struct ifreq *ifr, *ifend; u_int32_t ina, mask; - struct sockaddr_dl *dla; - struct ifreq ifreq; + char *aliasp; + struct ifreq ifreq, bestifreq; struct ifconf ifc; struct ifreq ifs[MAX_IFS]; - + + u_int32_t bestmask=0; + int found_interface = 0; + ifc.ifc_len = sizeof(ifs); ifc.ifc_req = ifs; - if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m"); + if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) { + if ( ! ok_error ( errno )) + error("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__); return 0; - } - MAINDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s", + } + + SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s", ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr))); /* * Scan through looking for an interface with an Internet * address on the same subnet as `ipaddr'. */ ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq)); - for (ifr = ifc.ifc_req; ifr < ifend; ifr++) - { - if (ifr->ifr_addr.sa_family == AF_INET) - { - ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; - strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); - MAINDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s", + for (ifr = ifc.ifc_req; ifr < ifend; ifr++) { + if (ifr->ifr_addr.sa_family == AF_INET) { + ina = SIN_ADDR(ifr->ifr_addr); + strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); + SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s", ifreq.ifr_name)); /* * Check that the interface is up, and not point-to-point - * or loopback. + * nor loopback. */ - if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) - { + if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0) continue; - } - if ((ifreq.ifr_flags & - (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) - != (IFF_UP|IFF_BROADCAST)) - { + + if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0) continue; - } /* * Get its netmask and check that it's on the right subnet. */ - if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) - { - continue; - } - mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; - MAINDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx", - ip_ntoa(ina), ntohl(mask))); + if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0) + continue; + + mask = SIN_ADDR(ifreq.ifr_addr); + SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx", + ip_ntoa(ina), ntohl(mask))); + if (((ipaddr ^ ina) & mask) != 0) - { - continue; - } - break; - } - } - - if (ifr >= ifend) - { - return 0; - } + continue; /* no match */ + /* matched */ + if (mask >= bestmask) { + /* Compare using >= instead of > -- it is possible for + an interface to have a netmask of 0.0.0.0 */ + found_interface = 1; + bestifreq = ifreq; + bestmask = mask; + } + } + } + + if (!found_interface) return 0; + + strlcpy(name, bestifreq.ifr_name, namelen); + + /* trim off the :1 in eth0:1 */ + aliasp = strchr(name, ':'); + if (aliasp != 0) + *aliasp = 0; - syslog(LOG_INFO, "found interface %s for proxy arp", ifreq.ifr_name); + info("found interface %s for proxy arp", name); /* * Now get the hardware address. */ - if (ioctl (sockfd, SIOCGIFHWADDR, &ifreq) < 0) - { - syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name); - return 0; - } + memset (&bestifreq.ifr_hwaddr, 0, sizeof (struct sockaddr)); + if (ioctl (sock_fd, SIOCGIFHWADDR, &bestifreq) < 0) { + error("SIOCGIFHWADDR(%s): %m", bestifreq.ifr_name); + return 0; + } - hwaddr->sa_family = ARPHRD_ETHER; - memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr.sa_data, ETH_ALEN); + memcpy (hwaddr, + &bestifreq.ifr_hwaddr, + sizeof (struct sockaddr)); - MAINDEBUG ((LOG_DEBUG, - "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x", + SYSDEBUG ((LOG_DEBUG, + "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", (int) ((unsigned char *) &hwaddr->sa_data)[0], (int) ((unsigned char *) &hwaddr->sa_data)[1], (int) ((unsigned char *) &hwaddr->sa_data)[2], (int) ((unsigned char *) &hwaddr->sa_data)[3], (int) ((unsigned char *) &hwaddr->sa_data)[4], - (int) ((unsigned char *) &hwaddr->sa_data)[5])); + (int) ((unsigned char *) &hwaddr->sa_data)[5], + (int) ((unsigned char *) &hwaddr->sa_data)[6], + (int) ((unsigned char *) &hwaddr->sa_data)[7])); return 1; - } +} /* + * get_if_hwaddr - get the hardware address for the specified + * network interface device. + */ +int +get_if_hwaddr(u_char *addr, char *name) +{ + struct ifreq ifreq; + int ret, sock_fd; + + sock_fd = socket(AF_INET, SOCK_DGRAM, 0); + if (sock_fd < 0) + return 0; + memset(&ifreq.ifr_hwaddr, 0, sizeof(struct sockaddr)); + strlcpy(ifreq.ifr_name, name, sizeof(ifreq.ifr_name)); + ret = ioctl(sock_fd, SIOCGIFHWADDR, &ifreq); + close(sock_fd); + if (ret >= 0) + memcpy(addr, ifreq.ifr_hwaddr.sa_data, 6); + return ret; +} + +/* + * get_first_ethernet - return the name of the first ethernet-style + * interface on this system. + */ +char * +get_first_ethernet() +{ + return "eth0"; +} + +/******************************************************************** + * * Return user specified netmask, modified by any mask we might determine * for address `addr' (in network byte order). * Here we scan through the system's list of interfaces, looking for @@ -1155,9 +1875,8 @@ int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) * network as `addr'. If we find any, we OR in their netmask to the * user-specified netmask. */ -u_int32_t -GetMask(addr) - u_int32_t addr; + +u_int32_t GetMask (u_int32_t addr) { u_int32_t mask, nmask, ina; struct ifreq *ifr, *ifend, ifreq; @@ -1165,278 +1884,1004 @@ GetMask(addr) struct ifreq ifs[MAX_IFS]; addr = ntohl(addr); + if (IN_CLASSA(addr)) /* determine network mask for address class */ nmask = IN_CLASSA_NET; else if (IN_CLASSB(addr)) - nmask = IN_CLASSB_NET; + nmask = IN_CLASSB_NET; else - nmask = IN_CLASSC_NET; + nmask = IN_CLASSC_NET; + /* class D nets are disallowed by bad_ip_adrs */ mask = netmask | htonl(nmask); - - /* - * Scan through the system's network interfaces. - */ +/* + * Scan through the system's network interfaces. + */ ifc.ifc_len = sizeof(ifs); ifc.ifc_req = ifs; - if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { - syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m"); + if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) { + if ( ! ok_error ( errno )) + warn("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__); return mask; } + ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); - for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) - ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { - /* - * Check the interface's internet address. - */ + for (ifr = ifc.ifc_req; ifr < ifend; ifr++) { +/* + * Check the interface's internet address. + */ if (ifr->ifr_addr.sa_family != AF_INET) continue; - ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; - if ((ntohl(ina) & nmask) != (addr & nmask)) + ina = SIN_ADDR(ifr->ifr_addr); + if (((ntohl(ina) ^ addr) & nmask) != 0) continue; - /* - * Check that the interface is up, and not point-to-point or loopback. - */ - strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) +/* + * Check that the interface is up, and not point-to-point nor loopback. + */ + strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0) continue; - if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) - != IFF_UP) + + if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0) continue; - /* - * Get its netmask and OR it into our mask. - */ - if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) +/* + * Get its netmask and OR it into our mask. + */ + if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0) continue; - mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr; + mask |= SIN_ADDR(ifreq.ifr_addr); + break; } - return mask; } -/* +/******************************************************************** + * * Internal routine to decode the version.modification.patch level */ static void decode_version (char *buf, int *version, int *modification, int *patch) - { +{ + char *endp; - *version = (int) strtoul (buf, &buf, 10); + *version = (int) strtoul (buf, &endp, 10); *modification = 0; *patch = 0; - - if (*buf == '.') - { - ++buf; - *modification = (int) strtoul (buf, &buf, 10); - if (*buf == '.') - { - ++buf; + + if (endp != buf && *endp == '.') { + buf = endp + 1; + *modification = (int) strtoul (buf, &endp, 10); + if (endp != buf && *endp == '.') { + buf = endp + 1; *patch = (int) strtoul (buf, &buf, 10); - } - } - - if (*buf != '\0') - { - *version = - *modification = - *patch = 0; - } - } + } + } +} -/* +/******************************************************************** + * + * Procedure to determine if the PPP line discipline is registered. + */ + +static int +ppp_registered(void) +{ + int local_fd; + int mfd = -1; + int ret = 0; + char slave[16]; + + /* + * We used to open the serial device and set it to the ppp line + * discipline here, in order to create a ppp unit. But that is + * not a good idea - the user might have specified a device that + * they can't open (permission, or maybe it doesn't really exist). + * So we grab a pty master/slave pair and use that. + */ + if (!get_pty(&mfd, &local_fd, slave, 0)) { + no_ppp_msg = "Couldn't determine if PPP is supported (no free ptys)"; + return 0; + } + + /* + * Try to put the device into the PPP discipline. + */ + if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) { + error("ioctl(TIOCSETD(PPP)): %m (line %d)", __LINE__); + } else + ret = 1; + + close(local_fd); + close(mfd); + return ret; +} + +/******************************************************************** + * * ppp_available - check whether the system has any ppp interfaces * (in fact we check whether we can do an ioctl on ppp0). */ int ppp_available(void) - { - int s, ok; +{ + int s, ok, fd; struct ifreq ifr; - int my_version, my_modification, my_patch; + int size; + int my_version, my_modification, my_patch; + int osmaj, osmin, ospatch; + + no_ppp_msg = + "This system lacks kernel support for PPP. This could be because\n" + "the PPP kernel module could not be loaded, or because PPP was not\n" + "included in the kernel configuration. If PPP was included as a\n" + "module, try `/sbin/modprobe -v ppp'. If that fails, check that\n" + "ppp.o exists in /lib/modules/`uname -r`/net.\n" + "See README.linux file in the ppp distribution for more details.\n"; + + /* get the kernel version now, since we are called before sys_init */ + uname(&utsname); + osmaj = osmin = ospatch = 0; + sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch); + kernel_version = KVERSION(osmaj, osmin, ospatch); + + fd = open("/dev/ppp", O_RDWR); +#if 0 + if (fd < 0 && errno == ENOENT) { + /* try making it and see if that helps. */ + if (mknod("/dev/ppp", S_IFCHR | S_IRUSR | S_IWUSR, + makedev(108, 0)) >= 0) { + fd = open("/dev/ppp", O_RDWR); + if (fd >= 0) + info("Created /dev/ppp device node"); + else + unlink("/dev/ppp"); /* didn't work, undo the mknod */ + } else if (errno == EEXIST) { + fd = open("/dev/ppp", O_RDWR); + } + } +#endif /* 0 */ + if (fd >= 0) { + new_style_driver = 1; + + /* XXX should get from driver */ + driver_version = 2; + driver_modification = 4; + driver_patch = 0; + close(fd); + return 1; + } + if (kernel_version >= KVERSION(2,3,13)) { + if (errno == ENOENT) + no_ppp_msg = + "pppd is unable to open the /dev/ppp device.\n" + "You need to create the /dev/ppp device node by\n" + "executing the following command as root:\n" + " mknod /dev/ppp c 108 0\n"; + return 0; + } + /* * Open a socket for doing the ioctl operations. - */ + */ s = socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) - { return 0; - } - - strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + + strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; +/* + * If the device did not exist then attempt to create one by putting the + * current tty into the PPP discipline. If this works then obtain the + * flags for the device again. + */ + if (!ok) { + if (ppp_registered()) { + strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; + } + } /* * Ensure that the hardware address is for PPP and not something else */ - if (ok != 0) - { - ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0; - } + if (ok) + ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0; + + if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP)) + ok = 0; - if (ok != 0 && ifr.ifr_hwaddr.sa_family != ARPHRD_PPP) - { - ok = 0; - } /* * This is the PPP device. Validate the version of the driver at this * point to ensure that this program will work with the driver. */ - if (ok != 0) - { - char abBuffer [1024]; - int size; + if (ok) { + char abBuffer [1024]; ifr.ifr_data = abBuffer; size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr); - ok = size >= 0; - - if (ok != 0) - { - decode_version (abBuffer, - &driver_version, - &driver_modification, - &driver_patch); - } - } - - if (ok == 0) - { - driver_version = - driver_modification = - driver_patch = 0; - } + if (size < 0) { + error("Couldn't read driver version: %m"); + ok = 0; + no_ppp_msg = "Sorry, couldn't verify kernel driver version\n"; + + } else { + decode_version(abBuffer, + &driver_version, + &driver_modification, + &driver_patch); /* * Validate the version of the driver against the version that we used. */ - decode_version (PPP_VERSION, - &my_version, - &my_modification, - &my_patch); - - /* The version numbers must match */ - if (driver_version != my_version) - { - ok = 0; - } - - /* The modification levels must be legal */ - if (driver_modification < my_modification) - { - ok = 0; - } - - if (ok == 0) - { - fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n", - driver_version, driver_modification, driver_patch); - } - - close(s); + decode_version(VERSION, + &my_version, + &my_modification, + &my_patch); + + /* The version numbers must match */ + if (driver_version != my_version) + ok = 0; + + /* The modification levels must be legal */ + if (driver_modification < 3) { + if (driver_modification >= 2) { + /* we can cope with 2.2.0 and above */ + driver_is_old = 1; + } else { + ok = 0; + } + } + + close (s); + if (!ok) { + slprintf(route_buffer, sizeof(route_buffer), + "Sorry - PPP driver version %d.%d.%d is out of date\n", + driver_version, driver_modification, driver_patch); + + no_ppp_msg = route_buffer; + } + } + } return ok; - } +} + +/******************************************************************** + * + * Update the wtmp file with the appropriate user name and tty device. + */ + +void logwtmp (const char *line, const char *name, const char *host) +{ + struct utmp ut, *utp; + pid_t mypid = getpid(); +#if __GLIBC__ < 2 + int wtmp; +#endif -int logwtmp (char *line, char *name, char *host) - { - struct utmp ut; - int mode; -/* - * Control the 'mesg' function based upon the state of the logon - * operation. - */ - mode = (*name != '\0') ? 0600 : 0622; - if (chmod (devnam, mode) < 0) - { - syslog (LOG_ERR, "chmod(\"%s\", 0%o): %m", devnam, mode); - } /* * Update the signon database for users. + * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996 + */ + utmpname(_PATH_UTMP); + setutent(); + while ((utp = getutent()) && (utp->ut_pid != mypid)) + /* nothing */; + + if (utp) + memcpy(&ut, utp, sizeof(ut)); + else + /* some gettys/telnetds don't initialize utmp... */ + memset(&ut, 0, sizeof(ut)); + + if (ut.ut_id[0] == 0) + strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id)); + + strncpy(ut.ut_user, name, sizeof(ut.ut_user)); + strncpy(ut.ut_line, line, sizeof(ut.ut_line)); + + time(&ut.ut_time); + + ut.ut_type = USER_PROCESS; + ut.ut_pid = mypid; + + /* Insert the host name if one is supplied */ + if (*host) + strncpy (ut.ut_host, host, sizeof(ut.ut_host)); + + /* Insert the IP address of the remote system if IP is enabled */ + if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr) + memcpy(&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr, + sizeof(ut.ut_addr)); + + /* CL: Makes sure that the logout works */ + if (*host == 0 && *name==0) + ut.ut_host[0]=0; + + pututline(&ut); + endutent(); +/* + * Update the wtmp file. + */ +#if __GLIBC__ >= 2 + updwtmp(_PATH_WTMP, &ut); +#else + wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY); + if (wtmp >= 0) { + flock(wtmp, LOCK_EX); + + if (write (wtmp, (char *)&ut, sizeof(ut)) != sizeof(ut)) + warn("error writing %s: %m", _PATH_WTMP); + + flock(wtmp, LOCK_UN); + + close (wtmp); + } +#endif +} + + +/******************************************************************** + * + * sifvjcomp - config tcp header compression + */ + +int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) +{ + u_int x; + + if (vjcomp) { + if (ioctl(ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) + error("Couldn't set up TCP header compression: %m"); + vjcomp = 0; + } + + x = (vjcomp? SC_COMP_TCP: 0) | (cidcomp? 0: SC_NO_TCP_CCID); + modify_flags(ppp_dev_fd, SC_COMP_TCP|SC_NO_TCP_CCID, x); + + return 1; +} + +/******************************************************************** + * + * sifup - Config the interface up and enable IP packets to pass. + */ + +int sifup(int u) +{ + struct ifreq ifr; + + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__); + return 0; + } + + ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT); + if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__); + return 0; + } + if_is_up++; + + return 1; +} + +/******************************************************************** + * + * sifdown - Disable the indicated protocol and config the interface + * down if there are no remaining protocols. + */ + +int sifdown (int u) +{ + struct ifreq ifr; + + if (if_is_up && --if_is_up > 0) + return 1; + + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__); + return 0; + } + + ifr.ifr_flags &= ~IFF_UP; + ifr.ifr_flags |= IFF_POINTOPOINT; + if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__); + return 0; + } + return 1; +} + +/******************************************************************** + * + * sifaddr - Config the interface IP addresses and netmask. */ - memset (&ut, 0, sizeof (ut)); - (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); - (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); - (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); - (void)time(&ut.ut_time); - - pututline (&ut); /* Write the line to the proper place */ - endutent(); /* Indicate operation is complete */ - } +int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr, + u_int32_t net_mask) +{ + struct ifreq ifr; + struct rtentry rt; + + memset (&ifr, '\0', sizeof (ifr)); + memset (&rt, '\0', sizeof (rt)); + + SET_SA_FAMILY (ifr.ifr_addr, AF_INET); + SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET); + SET_SA_FAMILY (ifr.ifr_netmask, AF_INET); + + strlcpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); +/* + * Set our IP address + */ + SIN_ADDR(ifr.ifr_addr) = our_adr; + if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (errno != EEXIST) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__); + } + else { + warn("ioctl(SIOCSIFADDR): Address already exists"); + } + return (0); + } +/* + * Set the gateway address + */ + SIN_ADDR(ifr.ifr_dstaddr) = his_adr; + if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFDSTADDR): %m (line %d)", __LINE__); + return (0); + } /* - * Code for locking/unlocking the serial device. - * This code is derived from chat.c. + * Set the netmask. + * For recent kernels, force the netmask to 255.255.255.255. */ + if (kernel_version >= KVERSION(2,1,16)) + net_mask = ~0L; + if (net_mask != 0) { + SIN_ADDR(ifr.ifr_netmask) = net_mask; + if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFNETMASK): %m (line %d)", __LINE__); + return (0); + } + } +/* + * Add the device route + */ + if (kernel_version < KVERSION(2,1,16)) { + SET_SA_FAMILY (rt.rt_dst, AF_INET); + SET_SA_FAMILY (rt.rt_gateway, AF_INET); + rt.rt_dev = ifname; + + SIN_ADDR(rt.rt_gateway) = 0L; + SIN_ADDR(rt.rt_dst) = his_adr; + rt.rt_flags = RTF_UP | RTF_HOST; + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + SIN_ADDR(rt.rt_genmask) = -1L; + } + + if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCADDRT) device route: %m (line %d)", __LINE__); + return (0); + } + } -#define LOCK_PREFIX "/var/lock/LCK.." + /* set ip_dynaddr in demand mode if address changes */ + if (demand && tune_kernel && !dynaddr_set + && our_old_addr && our_old_addr != our_adr) { + /* set ip_dynaddr if possible */ + char *path; + int fd; + + path = path_to_procfs("/sys/net/ipv4/ip_dynaddr"); + if (path != 0 && (fd = open(path, O_WRONLY)) >= 0) { + if (write(fd, "1", 1) != 1) + error("Couldn't enable dynamic IP addressing: %m"); + close(fd); + } + dynaddr_set = 1; /* only 1 attempt */ + } + our_old_addr = 0; + return 1; +} + +/******************************************************************** + * + * cifaddr - Clear the interface IP addresses, and delete routes + * through the interface if possible. + */ + +int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr) +{ + struct ifreq ifr; + + if (kernel_version < KVERSION(2,1,16)) { /* - * lock - create a lock file for the named device + * Delete the route through the device + */ + struct rtentry rt; + memset (&rt, '\0', sizeof (rt)); + + SET_SA_FAMILY (rt.rt_dst, AF_INET); + SET_SA_FAMILY (rt.rt_gateway, AF_INET); + rt.rt_dev = ifname; + + SIN_ADDR(rt.rt_gateway) = 0; + SIN_ADDR(rt.rt_dst) = his_adr; + rt.rt_flags = RTF_UP | RTF_HOST; + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + SIN_ADDR(rt.rt_genmask) = -1L; + } + + if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) { + if (still_ppp() && ! ok_error (errno)) + error("ioctl(SIOCDELRT) device route: %m (line %d)", __LINE__); + return (0); + } + } + + /* This way it is possible to have an IPX-only or IPv6-only interface */ + memset(&ifr, 0, sizeof(ifr)); + SET_SA_FAMILY(ifr.ifr_addr, AF_INET); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) { + error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__); + return 0; + } + } + + our_old_addr = our_adr; + + return 1; +} + +#ifdef INET6 +/******************************************************************** + * + * sif6addr - Config the interface with an IPv6 link-local address + */ +int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64) +{ + struct in6_ifreq ifr6; + struct ifreq ifr; + struct in6_rtmsg rt6; + + if (sock6_fd < 0) { + errno = -sock6_fd; + error("IPv6 socket creation failed: %m"); + return 0; + } + memset(&ifr, 0, sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) { + error("sif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__); + return 0; + } + + /* Local interface */ + memset(&ifr6, 0, sizeof(ifr6)); + IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); + ifr6.ifr6_ifindex = ifr.ifr_ifindex; + ifr6.ifr6_prefixlen = 10; + + if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) { + error("sif6addr: ioctl(SIOCSIFADDR): %m (line %d)", __LINE__); + return 0; + } + + /* Route to remote host */ + memset(&rt6, 0, sizeof(rt6)); + IN6_LLADDR_FROM_EUI64(rt6.rtmsg_dst, his_eui64); + rt6.rtmsg_flags = RTF_UP; + rt6.rtmsg_dst_len = 10; + rt6.rtmsg_ifindex = ifr.ifr_ifindex; + rt6.rtmsg_metric = 1; + + if (ioctl(sock6_fd, SIOCADDRT, &rt6) < 0) { + error("sif6addr: ioctl(SIOCADDRT): %m (line %d)", __LINE__); + return 0; + } + + return 1; +} + + +/******************************************************************** + * + * cif6addr - Remove IPv6 address from interface + */ +int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64) +{ + struct ifreq ifr; + struct in6_ifreq ifr6; + + if (sock6_fd < 0) { + errno = -sock6_fd; + error("IPv6 socket creation failed: %m"); + return 0; + } + memset(&ifr, 0, sizeof(ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) { + error("cif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__); + return 0; + } + + memset(&ifr6, 0, sizeof(ifr6)); + IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); + ifr6.ifr6_ifindex = ifr.ifr_ifindex; + ifr6.ifr6_prefixlen = 10; + + if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) { + if (errno != EADDRNOTAVAIL) { + if (! ok_error (errno)) + error("cif6addr: ioctl(SIOCDIFADDR): %m (line %d)", __LINE__); + } + else { + warn("cif6addr: ioctl(SIOCDIFADDR): No such address"); + } + return (0); + } + return 1; +} +#endif /* INET6 */ + +/* + * get_pty - get a pty master/slave pair and chown the slave side + * to the uid given. Assumes slave_name points to >= 16 bytes of space. + */ +int +get_pty(master_fdp, slave_fdp, slave_name, uid) + int *master_fdp; + int *slave_fdp; + char *slave_name; + int uid; +{ + int i, mfd, sfd = -1; + char pty_name[16]; + struct termios tios; + +#ifdef TIOCGPTN + /* + * Try the unix98 way first. + */ + mfd = open("/dev/ptmx", O_RDWR); + if (mfd >= 0) { + int ptn; + if (ioctl(mfd, TIOCGPTN, &ptn) >= 0) { + slprintf(pty_name, sizeof(pty_name), "/dev/pts/%d", ptn); + chmod(pty_name, S_IRUSR | S_IWUSR); +#ifdef TIOCSPTLCK + ptn = 0; + if (ioctl(mfd, TIOCSPTLCK, &ptn) < 0) + warn("Couldn't unlock pty slave %s: %m", pty_name); +#endif + if ((sfd = open(pty_name, O_RDWR | O_NOCTTY)) < 0) + warn("Couldn't open pty slave %s: %m", pty_name); + } + } +#endif /* TIOCGPTN */ + + if (sfd < 0) { + /* the old way - scan through the pty name space */ + for (i = 0; i < 64; ++i) { + slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x", + 'p' + i / 16, i % 16); + mfd = open(pty_name, O_RDWR, 0); + if (mfd >= 0) { + pty_name[5] = 't'; + sfd = open(pty_name, O_RDWR | O_NOCTTY, 0); + if (sfd >= 0) { + fchown(sfd, uid, -1); + fchmod(sfd, S_IRUSR | S_IWUSR); + break; + } + close(mfd); + } + } + } + + if (sfd < 0) + return 0; + + strlcpy(slave_name, pty_name, 16); + *master_fdp = mfd; + *slave_fdp = sfd; + if (tcgetattr(sfd, &tios) == 0) { + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB); + tios.c_cflag |= CS8 | CREAD | CLOCAL; + tios.c_iflag = IGNPAR; + tios.c_oflag = 0; + tios.c_lflag = 0; + if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0) + warn("couldn't set attributes on pty: %m"); + } else + warn("couldn't get attributes on pty: %m"); + + return 1; +} + +/******************************************************************** + * + * open_loopback - open the device we use for getting packets + * in demand mode. Under Linux, we use a pty master/slave pair. */ int -lock(dev) - char *dev; -{ - char hdb_lock_buffer[12]; - int fd, pid, n; - char *p; - - if ((p = strrchr(dev, '/')) != NULL) - dev = p + 1; - lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1); - if (lock_file == NULL) - novm("lock file name"); - strcat(strcpy(lock_file, LOCK_PREFIX), dev); - - while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) { - if (errno == EEXIST - && (fd = open(lock_file, O_RDONLY, 0)) >= 0) { - /* Read the lock file to find out who has the device locked */ - n = read(fd, hdb_lock_buffer, 11); - if (n > 0) { - hdb_lock_buffer[n] = 0; - sscanf (hdb_lock_buffer, " %d", &pid); +open_ppp_loopback(void) +{ + int flags; + + looped = 1; + if (new_style_driver) { + /* allocate ourselves a ppp unit */ + if (make_ppp_unit() < 0) + die(1); + modify_flags(ppp_dev_fd, 0, SC_LOOP_TRAFFIC); + set_kdebugflag(kdebugflag); + ppp_fd = -1; + return ppp_dev_fd; + } + + if (!get_pty(&master_fd, &slave_fd, loop_name, 0)) + fatal("No free pty for loopback"); + SYSDEBUG(("using %s for loopback", loop_name)); + + set_ppp_fd(slave_fd); + + flags = fcntl(master_fd, F_GETFL); + if (flags == -1 || + fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1) + warn("couldn't set master loopback to nonblock: %m"); + + flags = fcntl(ppp_fd, F_GETFL); + if (flags == -1 || + fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1) + warn("couldn't set slave loopback to nonblock: %m"); + + if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0) + fatal("ioctl(TIOCSETD): %m (line %d)", __LINE__); +/* + * Find out which interface we were given. + */ + if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) + fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__); +/* + * Enable debug in the driver if requested. + */ + set_kdebugflag (kdebugflag); + + return master_fd; +} + +/******************************************************************** + * + * sifnpmode - Set the mode for handling packets for a given NP. + */ + +int +sifnpmode(u, proto, mode) + int u; + int proto; + enum NPmode mode; +{ + struct npioctl npi; + + npi.protocol = proto; + npi.mode = mode; + if (ioctl(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) { + if (! ok_error (errno)) + error("ioctl(PPPIOCSNPMODE, %d, %d): %m", proto, mode); + return 0; + } + return 1; +} + + +/******************************************************************** + * + * sipxfaddr - Config the interface IPX networknumber + */ + +int sipxfaddr (int unit, unsigned long int network, unsigned char * node ) +{ + int result = 1; + +#ifdef IPX_CHANGE + int skfd; + struct ifreq ifr; + struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr; + + skfd = socket (AF_IPX, SOCK_DGRAM, 0); + if (skfd < 0) { + if (! ok_error (errno)) + dbglog("socket(AF_IPX): %m (line %d)", __LINE__); + result = 0; + } + else { + memset (&ifr, '\0', sizeof (ifr)); + strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + memcpy (sipx->sipx_node, node, IPX_NODE_LEN); + sipx->sipx_family = AF_IPX; + sipx->sipx_port = 0; + sipx->sipx_network = htonl (network); + sipx->sipx_type = IPX_FRAME_ETHERII; + sipx->sipx_action = IPX_CRTITF; +/* + * Set the IPX device + */ + if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + result = 0; + if (errno != EEXIST) { + if (! ok_error (errno)) + dbglog("ioctl(SIOCSIFADDR, CRTITF): %m (line %d)", __LINE__); } - if (n <= 0) { - syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file); - close(fd); - } else { - if (kill(pid, 0) == -1 && errno == ESRCH) { - /* pid no longer exists - remove the lock file */ - if (unlink(lock_file) == 0) { - close(fd); - syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)", - dev, pid); - continue; - } else - syslog(LOG_WARNING, "Couldn't remove stale lock on %s", - dev); - } else - syslog(LOG_NOTICE, "Device %s is locked by pid %d", - dev, pid); + else { + warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists"); } - close(fd); - } else - syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file); - free(lock_file); - lock_file = NULL; - return -1; + } + close (skfd); } +#endif + return result; +} - sprintf(hdb_lock_buffer, "%010d\n", getpid()); - write(fd, hdb_lock_buffer, 11); +/******************************************************************** + * + * cipxfaddr - Clear the information for the IPX network. The IPX routes + * are removed and the device is no longer able to pass IPX + * frames. + */ - close(fd); - return 0; +int cipxfaddr (int unit) +{ + int result = 1; + +#ifdef IPX_CHANGE + int skfd; + struct ifreq ifr; + struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr; + + skfd = socket (AF_IPX, SOCK_DGRAM, 0); + if (skfd < 0) { + if (! ok_error (errno)) + dbglog("socket(AF_IPX): %m (line %d)", __LINE__); + result = 0; + } + else { + memset (&ifr, '\0', sizeof (ifr)); + strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + sipx->sipx_type = IPX_FRAME_ETHERII; + sipx->sipx_action = IPX_DLTITF; + sipx->sipx_family = AF_IPX; +/* + * Set the IPX device + */ + if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (line %d)", __LINE__); + result = 0; + } + close (skfd); + } +#endif + return result; } /* - * unlock - remove our lockfile + * Use the hostname as part of the random number seed. */ -unlock() +int +get_host_seed() { - if (lock_file) { - unlink(lock_file); - free(lock_file); - lock_file = NULL; + int h; + char *p = hostname; + + h = 407; + for (p = hostname; *p != 0; ++p) + h = h * 37 + *p; + return h; +} + +/******************************************************************** + * + * sys_check_options - check the options that the user specified + */ + +int +sys_check_options(void) +{ +#ifdef IPX_CHANGE +/* + * Disable the IPX protocol if the support is not present in the kernel. + */ + char *path; + + if (ipxcp_protent.enabled_flag) { + struct stat stat_buf; + if ((path = path_to_procfs("/net/ipx_interface")) == 0 + || lstat(path, &stat_buf) < 0) { + error("IPX support is not present in the kernel\n"); + ipxcp_protent.enabled_flag = 0; + } + } +#endif + if (demand && driver_is_old) { + option_error("demand dialling is not supported by kernel driver " + "version %d.%d.%d", driver_version, driver_modification, + driver_patch); + return 0; + } + if (multilink && !new_style_driver) { + warn("Warning: multilink is not supported by the kernel driver"); + multilink = 0; } + return 1; } + +#ifdef INET6 +/* + * ether_to_eui64 - Convert 48-bit Ethernet address into 64-bit EUI + * + * convert the 48-bit MAC address of eth0 into EUI 64. caller also assumes + * that the system has a properly configured Ethernet interface for this + * function to return non-zero. + */ +int +ether_to_eui64(eui64_t *p_eui64) +{ + struct ifreq ifr; + int skfd; + const unsigned char *ptr; + + skfd = socket(PF_INET6, SOCK_DGRAM, 0); + if(skfd == -1) + { + warn("could not open IPv6 socket"); + return 0; + } + + strcpy(ifr.ifr_name, "eth0"); + if(ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0) + { + close(skfd); + warn("could not obtain hardware address for eth0"); + return 0; + } + close(skfd); + + /* + * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1] + */ + ptr = ifr.ifr_hwaddr.sa_data; + p_eui64->e8[0] = ptr[0] | 0x02; + p_eui64->e8[1] = ptr[1]; + p_eui64->e8[2] = ptr[2]; + p_eui64->e8[3] = 0xFF; + p_eui64->e8[4] = 0xFE; + p_eui64->e8[5] = ptr[3]; + p_eui64->e8[6] = ptr[4]; + p_eui64->e8[7] = ptr[5]; + + return 1; +} +#endif