X-Git-Url: https://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-linux.c;h=718a678bfbc4a4abf3af87d0547636b0a3b8a5a8;hp=d176edf2d01db235718b7874052fc1bc3758486d;hb=c1d7b083dc15423cae75be3c8b50a9a35aceac21;hpb=fbd84e94fedad26d52d3ab46de501da4945c98ca diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c index d176edf..718a678 100644 --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c @@ -18,15 +18,14 @@ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -/* - * TODO: - */ - #include #include #include #include #include +#include +#include +#include #include #include @@ -39,38 +38,96 @@ #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 +#else +#include +#include +#include +#include #include +#endif #include +#include + +#include +#include #include "pppd.h" #include "fsm.h" #include "ipcp.h" +#include "patchlevel.h" + +#ifdef IPX_CHANGE +#include "ipxcp.h" +#if __GLIBC__ >= 2 && \ + !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0) +#include +#else +#include +#endif +#endif /* IPX_CHANGE */ + +#ifdef LOCKLIB +#include +#endif + +#ifndef RTF_DEFAULT /* Normally in from */ +#define RTF_DEFAULT 0 +#endif + +/* We can get an EIO error on an ioctl if the modem has hung up */ +#define ok_error(num) ((num)==EIO) -static int initdisc = -1; /* Initial TTY discipline */ +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 prev_kdebugflag = 0; -static int has_default_route = 0; +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; + +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_is_old = 0; static int restore_term = 0; /* 1 => we've munged the terminal */ static struct termios inittermios; /* Initial TTY termios */ -static int sockfd; /* socket for doing interface ioctls */ +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 char *lock_file; +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) @@ -86,10 +143,14 @@ static char *path_to_route (void); static void close_route_table (void); static int open_route_table (void); static int read_route_table (struct rtentry *rt); -static int defaultroute_exists (void); -static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr); +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); +extern u_char inpacket_buf[]; /* borrowed from main.c */ /* * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, @@ -105,250 +166,297 @@ static void decode_version (char *buf, int *version, int *mod, int *patch); */ extern int hungup; -#define still_ppp() (hungup == 0) -/* +#ifndef LOCK_PREFIX +#define LOCK_PREFIX "/var/lock/LCK.." +#endif + +static void set_ppp_fd (int new_fd) +{ + SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd)); + ppp_fd = new_fd; +} + +static int still_ppp(void) +{ + if (!hungup || ppp_fd == slave_fd) + return 1; + if (slave_fd >= 0) { + set_ppp_fd(slave_fd); + return 1; + } + return 0; +} + +/******************************************************************** + * * Functions to read and set the flags value in the device driver */ static int get_flags (void) - { +{ int flags; - if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); - quit(); - } + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) { + if ( ok_error (errno) ) + flags = 0; + else + fatal("ioctl(PPPIOCGFLAGS): %m"); + } - MAINDEBUG ((LOG_DEBUG, "get flags = %x\n", flags)); + SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags)); return flags; - } +} + +/********************************************************************/ static void set_flags (int flags) - { - MAINDEBUG ((LOG_DEBUG, "set flags = %x\n", flags)); +{ + SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags)); - if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS, %x): %m", flags); - quit(); - } - } + if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) { + if (! ok_error (errno) ) + fatal("ioctl(PPPIOCSFLAGS, %x): %m(%d)", flags, errno); + } +} -/* +/******************************************************************** + * * sys_init - System-dependent initialization. */ void sys_init(void) - { +{ + int osmaj, osmin, ospatch; + 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. */ - sockfd = socket(AF_INET, SOCK_DGRAM, 0); - if (sockfd < 0) - { - syslog(LOG_ERR, "Couldn't create IP socket: %m"); - die(1); - } - } + sock_fd = socket(AF_INET, SOCK_DGRAM, 0); + if (sock_fd < 0) { + if ( ! ok_error ( errno )) + fatal("Couldn't create IP socket: %m(%d)", errno); + } + + FD_ZERO(&in_fds); + max_in_fd = 0; + + uname(&utsname); + osmaj = osmin = ospatch = 0; + sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch); + kernel_version = KVERSION(osmaj, osmin, ospatch); +} -/* +/******************************************************************** + * * sys_cleanup - restore any system state we modified before exiting: * mark the interface down, delete default route and/or proxy arp entry. - * This should call die() because it's called from die(). + * This shouldn't call die() because it's called from die(). */ -void sys_cleanup() -{ - struct ifreq ifr; +void sys_cleanup(void) +{ +/* + * Take down the device + */ if (if_is_up) sifdown(0); - /* XXX maybe we need to delete the route through the interface */ - if (has_default_route) - cifdefaultroute(0, default_route_gateway); +/* + * 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); } -/* - * note_debug_level - note a change in the debug level. +/******************************************************************** + * + * sys_close - Clean up in a child process before execing. */ +void +sys_close(void) +{ + if (sock_fd >= 0) + close(sock_fd); + if (slave_fd >= 0) + close(slave_fd); + if (master_fd >= 0) + close(master_fd); + closelog(); +} -void note_debug_level (void) - { - if (debug) - { - MAINDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug)); - setlogmask(LOG_UPTO(LOG_DEBUG)); - } - else - { - setlogmask(LOG_UPTO(LOG_WARNING)); - } - } - -/* +/******************************************************************** + * * set_kdebugflag - Define the debugging level for the kernel */ -int set_kdebugflag (int requested_level) - { - if (ioctl(ttyfd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m"); +static int set_kdebugflag (int requested_level) +{ + if (ioctl(ppp_fd, PPPIOCSDEBUG, &requested_level) < 0) { + if ( ! ok_error (errno) ) + error("ioctl(PPPIOCSDEBUG): %m"); return (0); - } - - if (prev_kdebugflag != requested_level) - { - if (ioctl(ttyfd, PPPIOCSDEBUG, &requested_level) < 0) - { - syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m"); - return (0); - } - MAINDEBUG ((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. */ -void establish_ppp (int fd) - { - int pppdisc = N_PPP; - int sig = SIGIO; +int establish_ppp (int tty_fd) +{ + int x; +/* + * The current PPP device will be the tty file. + */ + set_ppp_fd (tty_fd); +/* + * Ensure that the tty device is in exclusive mode. + */ + if (ioctl(tty_fd, TIOCEXCL, 0) < 0) { + if ( ! ok_error ( errno )) + warn("ioctl(TIOCEXCL): %m"); + } +/* + * Demand mode - prime the old ppp device to relinquish the unit. + */ + if (demand && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0) + fatal("ioctl(transfer ppp unit): %m(%d)", errno); +/* + * Set the current tty to the PPP discpline + */ + if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0) { + if ( ! ok_error (errno) ) + fatal("ioctl(TIOCSETD): %m(%d)", errno); + } +/* + * Find out which interface we were given. + */ + if (ioctl(ppp_fd, PPPIOCGUNIT, &x) < 0) { + if ( ! ok_error (errno)) + fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno); + } +/* + * Check that we got the same unit again. + */ + if (demand) { + if (x != ifunit) + fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x); + } - if (ioctl(fd, TIOCEXCL, 0) < 0) - { - syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m"); - } - - if (ioctl(fd, TIOCGETD, &initdisc) < 0) - { - syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); - die (1); - } - - if (ioctl(fd, TIOCSETD, &pppdisc) < 0) - { - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); - die (1); - } - - if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m"); - die (1); - } - - set_kdebugflag (kdebugflag); + ifunit = x; +/* + * Enable debug in the driver if requested. + */ + if (!demand) + set_kdebugflag (kdebugflag); set_flags (get_flags() & ~(SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP)); - MAINDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver", + SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver", driver_version, driver_modification, driver_patch)); +/* + * Fetch the initial file flags and reset blocking mode on the file. + */ + initfdflags = fcntl(ppp_fd, F_GETFL); - /* - * Set device for non-blocking reads. - */ - if ((initfdflags = fcntl(fd, F_GETFL)) == -1 - || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { - { - syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m"); - } - } + if (initfdflags == -1 || + fcntl(ppp_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { + if ( ! ok_error (errno)) + warn("Couldn't set device to non-blocking mode: %m"); + } -/* + return ppp_fd; +} + +/******************************************************************** + * * disestablish_ppp - Restore the serial port to normal operation. * This shouldn't call die() because it's called from die(). */ -void disestablish_ppp(int fd) - { - int x; - char *s; - - /* Reset non-blocking mode on the file descriptor. */ - if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) - syslog(LOG_WARNING, "Couldn't restore device fd flags: %m"); - initfdflags = -1; - - if (still_ppp() && initdisc >= 0) - { - set_kdebugflag (prev_kdebugflag); - - if (ioctl(fd, TIOCSETD, &initdisc) < 0) - { - syslog(LOG_WARNING, "ioctl(TIOCSETD): %m"); - } +void disestablish_ppp(int tty_fd) +{ +/* + * Attempt to restore the previous tty settings + */ + if (!hungup) { +/* + * Restore the previous line discipline + */ + if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) { + if ( ! ok_error (errno)) + error("ioctl(TIOCSETD, N_TTY): %m"); + } - if (ioctl(fd, TIOCNXCL, 0) < 0) - { - syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m"); - } - } - initdisc = -1; - } + if (ioctl(tty_fd, TIOCNXCL, 0) < 0) { + if ( ! ok_error (errno)) + warn("ioctl(TIOCNXCL): %m(%d)", errno); + } + + /* 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"); + } + } + initfdflags = -1; +} -/* +/******************************************************************** + * * clean_check - Fetch the flags for the device and generate * appropriate error messages. */ void clean_check(void) - { - if (still_ppp() && initdisc >= 0) - { - if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) - { +{ + int x; + char *s; + + 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 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP: - s = "nothing was received"; - break; - - case SC_RCV_B7_0: - case SC_RCV_B7_0 | SC_RCV_EVNP: - case SC_RCV_B7_0 | SC_RCV_ODDP: - case SC_RCV_B7_0 | SC_RCV_ODDP | SC_RCV_EVNP: + switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { + case SC_RCV_B7_0: + case SC_RCV_B7_0 | SC_RCV_EVNP: + case SC_RCV_B7_0 | SC_RCV_ODDP: + case SC_RCV_B7_0 | SC_RCV_ODDP | SC_RCV_EVNP: s = "all had bit 7 set to 1"; break; - case SC_RCV_B7_1: - case SC_RCV_B7_1 | SC_RCV_EVNP: - case SC_RCV_B7_1 | SC_RCV_ODDP: - case SC_RCV_B7_1 | SC_RCV_ODDP | SC_RCV_EVNP: + case SC_RCV_B7_1: + case SC_RCV_B7_1 | SC_RCV_EVNP: + case SC_RCV_B7_1 | SC_RCV_ODDP: + case SC_RCV_B7_1 | SC_RCV_ODDP | SC_RCV_EVNP: s = "all had bit 7 set to 0"; break; - case SC_RCV_EVNP: + case SC_RCV_EVNP: s = "all had odd parity"; break; - case SC_RCV_ODDP: + case SC_RCV_ODDP: s = "all had even parity"; break; - } + } - if (s != NULL) - { - syslog(LOG_WARNING, "Receive serial link is not" - " 8-bit clean:"); - syslog(LOG_WARNING, "Problem: %s", s); - } - } - } - } + if (s != NULL) { + warn("Receive serial link is not 8-bit clean:"); + warn("Problem: %s", s); + } + } + } +} /* @@ -412,85 +520,85 @@ struct speed { #ifdef B38400 { 38400, B38400 }, #endif +#ifdef B57600 + { 57600, B57600 }, +#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 { 0, 0 } }; -/* +/******************************************************************** + * * Translate from bits/second to a speed_t. */ static int translate_speed (int bps) - { +{ struct speed *speedp; - if (bps != 0) - { - for (speedp = speeds; speedp->speed_int; speedp++) - { + if (bps != 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); - } + } + warn("speed %d not supported", bps); + } return 0; - } +} -/* +/******************************************************************** + * * Translate from a speed_t to bits/second. */ static int baud_rate_of (int speed) - { +{ struct speed *speedp; - if (speed != 0) - { - for (speedp = speeds; speedp->speed_int; speedp++) - { + 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) - { - int speed, x; +void set_up_tty(int tty_fd, int local) +{ + 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(%d)", errno); + return; + } if (!restore_term) - { inittermios = tios; - } tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); tios.c_cflag |= CS8 | CREAD | HUPCL; @@ -502,12 +610,9 @@ void set_up_tty (int fd, int local) tios.c_cc[VTIME] = 0; if (local || !modem) - { tios.c_cflag ^= (CLOCAL | HUPCL); - } - switch (crtscts) - { + switch (crtscts) { case 1: tios.c_cflag |= CRTSCTS; break; @@ -524,59 +629,52 @@ void set_up_tty (int fd, int local) default: break; - } + } speed = translate_speed(inspeed); - if (speed) - { + if (speed) { cfsetospeed (&tios, speed); cfsetispeed (&tios, speed); - } + } /* * We can't proceed if the serial port speed is B0, * since that implies that the serial port is disabled. */ - else - { + else { speed = cfgetospeed(&tios); if (speed == B0) - { - syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate", - devnam); - die (1); - } - } - - if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) - { - syslog(LOG_ERR, "tcsetattr: %m"); - die(1); - } + fatal("Baud rate for %s is 0; need explicit baud rate", devnam); + } + + if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0) + if (!ok_error(errno)) + fatal("tcsetattr: %m"); baud_rate = baud_rate_of(speed); - restore_term = TRUE; - } + 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 (int fd) - { - if (restore_term) - { +void restore_tty (int tty_fd) +{ + if (restore_term) { restore_term = 0; /* * Turn off echoing, because otherwise we can get into @@ -585,192 +683,253 @@ void restore_tty (int fd) * when we close it, it will revert to its defaults anyway. */ if (!default_device) - { inittermios.c_lflag &= ~(ECHO | ECHONL); - } - if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) - { - if (errno != EIO) - { - syslog(LOG_WARNING, "tcsetattr: %m"); - } - } - } - } + if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) { + if (! ok_error (errno)) + warn("tcsetattr: %m"); + } + } +} -/* +/******************************************************************** + * * output - Output PPP packet. */ void output (int unit, unsigned char *p, int len) - { +{ if (debug) - { - log_packet(p, len, "sent "); - } + dbglog("sent %P", p, len); - if (write(ttyfd, p, len) < 0) - { + if (write(ppp_fd, p, len) < 0) { if (errno == EWOULDBLOCK || errno == ENOBUFS - || errno == ENXIO || errno == EIO) - { - syslog(LOG_WARNING, "write: warning: %m"); - } + || errno == ENXIO || errno == EIO || errno == EINTR) + warn("write: warning: %m (%d)", errno); else - { - syslog(LOG_ERR, "write: %m"); - die(1); - } - } - } + error("write: %m (%d)", errno); + } +} -/* - * wait_input - wait until there is data available on ttyfd, +/******************************************************************** + * + * 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; int n; - - FD_ZERO(&ready); - FD_SET(ttyfd, &ready); - n = select(ttyfd+1, &ready, NULL, &ready, timo); + ready = in_fds; + n = select(max_in_fd + 1, &ready, NULL, &ready, timo); if (n < 0 && errno != EINTR) - { - syslog(LOG_ERR, "select: %m"); - die(1); - } - } + fatal("select: %m(%d)", errno); +} + +/* + * add_fd - add an fd to the set that wait_input waits for. + */ +void add_fd(int 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); +} + +#if 0 +/******************************************************************** + * + * wait_loop_output - wait until there is data available on the + * loopback, for the length of time specified by *timo (indefinite + * if timo is NULL). + */ +void wait_loop_output(timo) + struct timeval *timo; +{ + fd_set ready; + int n; + + FD_ZERO(&ready); + FD_SET(master_fd, &ready); + n = select(master_fd + 1, &ready, NULL, &ready, timo); + if (n < 0 && errno != EINTR) + fatal("select: %m(%d)", errno); +} + +/******************************************************************** + * + * wait_time - wait for a given length of time or until a + * signal is received. + */ + +void wait_time(timo) + struct timeval *timo; +{ + int n; + + n = select(0, NULL, NULL, NULL, timo); + if (n < 0 && errno != EINTR) + fatal("select: %m(%d)", errno); +} +#endif + +/******************************************************************** + * * read_packet - get a PPP packet from the serial device. */ int read_packet (unsigned char *buf) - { +{ int len; - len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN); - if (len < 0) - { - if (errno == EWOULDBLOCK) - { + len = read(ppp_fd, buf, PPP_MTU + PPP_HDRLEN); + if (len < 0) { + if (errno == EWOULDBLOCK || errno == EIO) return -1; - } - syslog(LOG_ERR, "read: %m"); - die(1); - } + fatal("read: %m(%d)", errno); + } return len; - } +} -/* +/******************************************************************** + * + * 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. + */ +int +get_loop_output(void) +{ + int rv = 0; + int n = read(master_fd, inbuf, sizeof(inbuf)); + + while (n > 0) { + if (loop_chars(inbuf, n)) + rv = 1; + n = read(master_fd, inbuf, sizeof(inbuf)); + } + + if (n == 0) + fatal("eof on loopback"); + + if (errno != EWOULDBLOCK) + fatal("read from loopback: %m(%d)", errno); + + return rv; +} + +/******************************************************************** + * * ppp_send_config - configure the transmit characteristics of * the ppp interface. */ void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp) - { +{ u_int x; struct ifreq ifr; - MAINDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu)); + SYSDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu)); /* * Ensure that the link is still up. */ - if (still_ppp()) - { + if (!still_ppp()) + return; /* * Set the MTU and other parameters for the ppp device */ - memset (&ifr, '\0', sizeof (ifr)); - strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - ifr.ifr_mtu = mtu; + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(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(); - } + if (ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0) + fatal("ioctl(SIOCSIFMTU): %m(%d)", errno); - MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m"); - quit(); - } + SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap)); + if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (!ok_error(errno)) + fatal("ioctl(PPPIOCSASYNCMAP): %m(%d)", errno); + return; + } - x = get_flags(); - x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT; - x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC; - set_flags(x); - } - } + x = get_flags(); + x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT; + x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC; + x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; + set_flags(x); +} -/* +/******************************************************************** + * * ppp_set_xaccm - set the extended transmit ACCM for the interface. */ void ppp_set_xaccm (int unit, ext_accm accm) - { - MAINDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n", +{ + SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n", accm[0], accm[1], accm[2], accm[3])); - if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) - { - syslog(LOG_WARNING, "ioctl(set extended ACCM): %m"); - } - } + if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) { + if ( ! ok_error (errno)) + warn("ioctl(set extended ACCM): %m(%d)", errno); + } +} -/* +/******************************************************************** + * * ppp_recv_config - configure the receive-side characteristics of * the ppp interface. */ void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp) - { +{ u_int x; - MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru)); + SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru)); /* * If we were called because the link has gone down then there is nothing * which may be done. Just return without incident. */ if (!still_ppp()) - { return; - } /* * Set the receiver parameters */ - if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m"); - } + if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) { + if ( ! ok_error (errno)) + error("ioctl(PPPIOCSMRU): %m(%d)", errno); + } - MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m"); - quit(); - } + SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap)); + if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (!ok_error(errno)) + error("ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno); + } x = get_flags(); x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; set_flags (x); - } +} -/* +/******************************************************************** + * * ccp_test - ask kernel whether a given compression method * is acceptable for use. */ int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit) - { +{ struct ppp_option_data data; memset (&data, '\0', sizeof (data)); @@ -778,612 +937,521 @@ int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit) data.length = opt_len; data.transmit = for_transmit; - if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) - { + if (ioctl(ppp_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) return 1; - } return (errno == ENOBUFS)? 0: -1; - } +} -/* +/******************************************************************** + * * ccp_flags_set - inform kernel about the current state of CCP. */ void ccp_flags_set (int unit, int isopen, int isup) - { - if (still_ppp()) - { +{ + if (still_ppp()) { int x = get_flags(); x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN; x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP; set_flags (x); - } - } + } +} -/* +/******************************************************************** + * + * 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_fd, PPPIOCGIDLE, ip) >= 0; +} + +/******************************************************************** + * + * get_ppp_stats - return statistics for the link. + */ +int +get_ppp_stats(u, stats) + int u; + struct pppd_stats *stats; +{ + struct ifpppstatsreq req; + + memset (&req, 0, sizeof (req)); + + 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; + return 1; +} + +/******************************************************************** + * * 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 ccp_fatal_error (int unit) - { +{ int x = get_flags(); return x & SC_DC_FERROR; - } +} /* - * sifvjcomp - config tcp header compression + * path_to_route - determine the path to the proc file system data */ +#define ROUTE_MAX_COLS 12 +FILE *route_fd = (FILE *) 0; +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; -int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) - { - u_int x = get_flags(); - - if (vjcomp) - { - if (ioctl (ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) - { - syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - vjcomp = 0; - } - } - - x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP; - x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID; - set_flags (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)); - 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 | IFF_POINTOPOINT); - if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); - return 0; - } - if_is_up = 1; - return 1; - } +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); -/* - * sifdown - Config the interface down and disable IP. +/******************************************************************** + * + * path_to_procfs - find the path to the proc file system mount point */ -int sifdown (int u) - { - struct ifreq ifr; +static int path_to_procfs (void) +{ + struct mntent *mntent; + FILE *fp; - memset (&ifr, '\0', sizeof (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; - } + fp = fopen(MOUNTED, "r"); + if (fp == NULL) { + /* Default the mount location of /proc */ + strlcpy (route_buffer, "/proc", sizeof (route_buffer)); + return 1; + } - ifr.ifr_flags &= ~IFF_UP; - ifr.ifr_flags |= IFF_POINTOPOINT; - if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) - { - syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); + while ((mntent = getmntent(fp)) != NULL) { + if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0) + continue; + if (strcmp(mntent->mnt_type, "proc") == 0) + break; + } + fclose (fp); + if (mntent == 0) return 0; - } - if_is_up = 0; - return 1; - } - -/* - * sifaddr - Config the interface IP addresses and netmask. - */ - -int sifaddr (int unit, int our_adr, int his_adr, int 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); - - 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 - */ - SET_SA_FAMILY (rt.rt_dst, AF_INET); - SET_SA_FAMILY (rt.rt_gateway, AF_INET); - rt.rt_dev = ifname; /* MJC */ - - ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L; - ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; - rt.rt_flags = RTF_UP | RTF_HOST; - - if (ioctl(sockfd, SIOCADDRT, &rt) < 0) - { - syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m"); - return (0); - } - return 1; - } - -/* - * cifaddr - Clear the interface IP addresses, and delete routes - * through the interface if possible. - */ - -int cifaddr (int unit, int our_adr, int his_adr) - { - struct rtentry rt; -/* - * Delete the route through the device - */ - 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 */ - ((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 (ioctl(sockfd, SIOCDELRT, &rt) < 0 && errno != ESRCH) - { - if (still_ppp()) - { - syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m"); - return (0); - } - } + strlcpy(route_buffer, mntent->mnt_dir, sizeof (route_buffer)); return 1; - } - -/* - * path_to_route - determine the path to the proc file system data - */ - -FILE *route_fd = (FILE *) 0; -static char route_buffer [512]; - -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 */ static char *path_to_route (void) - { - struct mntent *mntent; - FILE *fp; - - fp = fopen (MOUNTED, "r"); - if (fp != 0) - { - mntent = getmntent (fp); - while (mntent != (struct mntent *) 0) - { - if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) != 0) - { - 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); - } - } - mntent = getmntent (fp); - } - fclose (fp); - } - - syslog (LOG_ERR, "proc file system not mounted"); - return 0; - } +{ + if (!path_to_procfs()) { + error("proc file system not mounted"); + return 0; + } + strlcat (route_buffer, "/net/route", sizeof(route_buffer)); + return (route_buffer); +} -/* +/******************************************************************** + * * close_route_table - close the interface to the route table */ static void close_route_table (void) - { - if (route_fd != (FILE *) 0) - { +{ + 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; close_route_table(); path = path_to_route(); if (path == NULL) - { return 0; - } route_fd = fopen (path, "r"); - if (route_fd == (FILE *) 0) - { - syslog (LOG_ERR, "can not open %s: %m", path); + if (route_fd == NULL) { + error("can't open %s: %m (%d)", path, errno); return 0; - } + } + + 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; + } + } + 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; +static int read_route_table(struct rtentry *rt) +{ + char *cols[ROUTE_MAX_COLS], *p; + int col; memset (rt, '\0', sizeof (struct rtentry)); - for (;;) - { - if (fgets (route_buffer, sizeof (route_buffer), route_fd) == - (char *) 0) - { - return 0; - } + if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) + return 0; - 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 (flag_ptr == (char *) 0) /* assume that we failed, somewhere. */ - { - return 0; - } - - /* Discard that stupid header line which should never - * have been there in the first place !! */ - if (isxdigit (*dst_ptr) && isxdigit (*gw_ptr) && isxdigit (*flag_ptr)) - { - break; - } - } + 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 */ + } ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr = - strtoul (dst_ptr, NULL, 16); + strtoul(cols[route_dest_col], NULL, 16); ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr = - strtoul (gw_ptr, NULL, 16); + strtoul(cols[route_gw_col], NULL, 16); - rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16); - rt->rt_dev = dev_ptr; + ((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr = + strtoul(cols[route_mask_col], NULL, 16); + + 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; - } - 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)); + + if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 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 & ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr) + == ((struct sockaddr_in *)&rt.rt_dst)->sin_addr.s_addr) { + 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 (has_default_route == 0) - { - if (defaultroute_exists()) - { - return 0; - } + if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) { + struct in_addr old_gateway = + ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr; - 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 (old_gateway.s_addr != 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); + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; + } + + ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; - rt.rt_flags = RTF_UP | RTF_GATEWAY; - if (ioctl(sockfd, SIOCADDRT, &rt) < 0) - { - syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m"); - return 0; - } - } - has_default_route = 1; - default_route_gateway = g; + rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT; + if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCADDRT): %m(%d)", errno); + 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; - if (has_default_route) - { - 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; + 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); + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L; + } + + ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway; - rt.rt_flags = RTF_UP | RTF_GATEWAY; - if (ioctl(sockfd, SIOCDELRT, &rt) < 0 && errno != ESRCH) - { - if (still_ppp()) - { - syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m"); - return 0; - } - } - } - has_default_route = 0; + rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT; + if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) { + if (still_ppp()) { + if ( ! ok_error ( errno )) + error("default route ioctl(SIOCDELRT): %m (%d)", errno); + 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; - if (has_proxy_arp == 0) - { + if (has_proxy_arp == 0) { 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; + 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"); + 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; - } - - 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"); + } + 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(%d)", errno); return 0; - } - } + } + proxy_arp_addr = his_adr; + has_proxy_arp = 1; + } - proxy_arp_addr = hisaddr; - has_proxy_arp = 1; return 1; - } +} -/* +/******************************************************************** + * * cifproxyarp - Delete the proxy ARP entry for the peer. */ int cifproxyarp (int unit, u_int32_t his_adr) - { +{ struct arpreq arpreq; - if (has_proxy_arp == 1) - { + if (has_proxy_arp) { + has_proxy_arp = 0; 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"); + 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(%d)", errno); return 0; - } - } - has_proxy_arp = 0; + } + } return 1; - } +} -/* +/******************************************************************** + * * get_ether_addr - get the hardware address of an interface on the * the same subnet as ipaddr. */ -static 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; struct ifconf ifc; struct ifreq ifs[MAX_IFS]; 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(%d)", errno); 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) - { + 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", + 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 * nor loopback. */ - if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) - { + if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0) continue; - } 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) - { + if (ioctl(sock_fd, 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", + 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; - } - syslog(LOG_INFO, "found interface %s for proxy arp", ifreq.ifr_name); + strlcpy(name, ifreq.ifr_name, namelen); + info("found interface %s for proxy arp", name); /* * Now get the hardware address. */ memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr)); - if (ioctl (sockfd, SIOCGIFHWADDR, &ifreq) < 0) - { - syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name); + if (ioctl (sock_fd, SIOCGIFHWADDR, &ifreq) < 0) { + error("SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno); return 0; - } + } memcpy (hwaddr, &ifreq.ifr_hwaddr, sizeof (struct sockaddr)); - MAINDEBUG ((LOG_DEBUG, + 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], @@ -1394,9 +1462,10 @@ static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) (int) ((unsigned char *) &hwaddr->sa_data)[6], (int) ((unsigned char *) &hwaddr->sa_data)[7])); return 1; - } +} -/* +/******************************************************************** + * * 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 @@ -1406,7 +1475,7 @@ static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) */ u_int32_t GetMask (u_int32_t addr) - { +{ u_int32_t mask, nmask, ina; struct ifreq *ifr, *ifend, ifreq; struct ifconf ifc; @@ -1415,20 +1484,11 @@ u_int32_t GetMask (u_int32_t addr) addr = ntohl(addr); if (IN_CLASSA(addr)) /* determine network mask for address class */ - { nmask = IN_CLASSA_NET; - } - else - { - if (IN_CLASSB(addr)) - { + else if (IN_CLASSB(addr)) nmask = IN_CLASSB_NET; - } - else - { + else nmask = IN_CLASSC_NET; - } - } /* class D nets are disallowed by bad_ip_adrs */ mask = netmask | htonl(nmask); @@ -1437,109 +1497,94 @@ u_int32_t GetMask (u_int32_t addr) */ 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(%d)", errno); return mask; - } + } ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); - for (ifr = ifc.ifc_req; ifr < ifend; ifr++) - { + 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) ^ addr) & nmask) != 0) - { continue; - } /* * Check that the interface is up, and not point-to-point nor loopback. */ - strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); - if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) - { + strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0) continue; - } 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) - { + if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0) continue; - } mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_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) - { +{ *version = (int) strtoul (buf, &buf, 10); *modification = 0; *patch = 0; - if (*buf == '.') - { + if (*buf == '.') { ++buf; *modification = (int) strtoul (buf, &buf, 10); - if (*buf == '.') - { + if (*buf == '.') { ++buf; *patch = (int) strtoul (buf, &buf, 10); - } - } + } + } - if (*buf != '\0') - { + if (*buf != '\0') { *version = *modification = *patch = 0; - } - } + } +} -/* - * Procedure to determine if the PPP line dicipline is registered. +/******************************************************************** + * + * Procedure to determine if the PPP line discipline is registered. */ -int +static int ppp_registered(void) - { +{ int local_fd; - int ppp_disc = N_PPP; int init_disc = -1; int initfdflags; local_fd = open(devnam, O_NONBLOCK | O_RDWR, 0); - if (local_fd < 0) - { - syslog(LOG_ERR, "Failed to open %s: %m", devnam); + if (local_fd < 0) { + error("Failed to open %s: %m(%d)", devnam, errno); return 0; - } + } initfdflags = fcntl(local_fd, F_GETFL); - if (initfdflags == -1) - { - syslog(LOG_ERR, "Couldn't get device fd flags: %m"); + if (initfdflags == -1) { + error("Couldn't get device fd flags: %m(%d)", errno); close (local_fd); return 0; - } + } initfdflags &= ~O_NONBLOCK; fcntl(local_fd, F_SETFL, initfdflags); @@ -1547,278 +1592,840 @@ ppp_registered(void) * Read the initial line dicipline and try to put the device into the * PPP dicipline. */ - if (ioctl(local_fd, TIOCGETD, &init_disc) < 0) - { - syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); + if (ioctl(local_fd, TIOCGETD, &init_disc) < 0) { + error("ioctl(TIOCGETD): %m(%d)", errno); close (local_fd); return 0; - } + } - if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) - { - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); + if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) { + error("ioctl(TIOCSETD): %m(%d)", errno); close (local_fd); return 0; - } + } - if (ioctl(local_fd, TIOCSETD, &init_disc) < 0) - { - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); + if (ioctl(local_fd, TIOCSETD, &init_disc) < 0) { + error("ioctl(TIOCSETD): %m(%d)", errno); close (local_fd); return 0; - } + } close (local_fd); return 1; - } +} -/* +/******************************************************************** + * * 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; struct ifreq ifr; - char abBuffer [1024]; int size; int my_version, my_modification, my_patch; + extern char *no_ppp_msg; /* * 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()) - { - strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + 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) - { ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0; - } if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP)) - { ok = 0; - } if (!ok) - { - return 0; - } + no_ppp_msg = + "This system lacks kernel support for PPP. This could be because\n" + "the PPP kernel module is not loaded, or because the kernel is\n" + "not configured for PPP. See the README.linux file in the\n" + "ppp-2.3.6 distribution.\n"; + /* * This is the PPP device. Validate the version of the driver at this * point to ensure that this program will work with the driver. */ - ifr.ifr_data = abBuffer; - size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr); - ok = size >= 0; + else { + char abBuffer [1024]; - if (ok) - { - decode_version (abBuffer, - &driver_version, - &driver_modification, - &driver_patch); - } - - if (!ok) - { - driver_version = - driver_modification = - driver_patch = 0; - } + ifr.ifr_data = abBuffer; + size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr); + 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); + decode_version(VERSION, + &my_version, + &my_modification, + &my_patch); - /* The version numbers must match */ - if (driver_version != my_version) - { - ok = 0; - } + /* 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) - { - fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n", - driver_version, driver_modification, driver_patch); - close (s); - exit (1); - } - - close(s); + /* 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. */ -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); - } +void logwtmp (const char *line, const char *name, const char *host) +{ + int wtmp; + struct utmp ut, *utp; + pid_t mypid = getpid(); /* * Update the signon database for users. + * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996 */ - 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); + utmpname(_PATH_UTMP); + setutent(); + while ((utp = getutent()) && (utp->ut_pid != mypid)) + /* nothing */; + + /* Is this call really necessary? There is another one after the 'put' */ + endutent(); + + 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) + strlcpy(ut.ut_id, line + 3, sizeof(ut.ut_id)); - pututline (&ut); /* Write the line to the proper place */ - endutent(); /* Indicate operation is complete */ - } + strlcpy(ut.ut_user, name, sizeof(ut.ut_user)); + strlcpy(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) + strlcpy (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. + */ + wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY); + if (wtmp >= 0) { + flock(wtmp, LOCK_EX); + + /* we really should check for error on the write for a full disk! */ + write (wtmp, (char *)&ut, sizeof(ut)); + close (wtmp); + + flock(wtmp, LOCK_UN); + } +} + +/******************************************************************** * Code for locking/unlocking the serial device. * This code is derived from chat.c. */ -#define LOCK_PREFIX "/var/lock/LCK.." - /* * lock - create a lock file for the named device */ int lock (char *dev) - { +{ +#ifdef LOCKLIB + int result; + lock_file = strdup(dev); + if (lock_file == NULL) + novm("lock file name"); + result = mklock (dev, (void *) 0); + + if (result > 0) { + notice("Device %s is locked by pid %d", dev, result); + free (lock_file); + lock_file = NULL; + result = -1; + } + else { + if (result < 0) { + error("Can't create lock file %s", lock_file); + free (lock_file); + lock_file = NULL; + result = -1; + } + } + return (result); +#else char hdb_lock_buffer[12]; - int fd, pid, n; + int fd, n; + int pid = getpid(); char *p; + size_t l; p = strrchr(dev, '/'); if (p != NULL) - { dev = ++p; - } - lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1); + l = strlen(LOCK_PREFIX) + strlen(dev) + 1; + lock_file = malloc(l); if (lock_file == NULL) - { novm("lock file name"); - } - strcpy (lock_file, LOCK_PREFIX); - strcat (lock_file, dev); + slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev); /* * Attempt to create the lock file at this point. */ - while (1) - { + while (1) { fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644); - if (fd >= 0) - { - sprintf(hdb_lock_buffer, "%010d\n", getpid()); - write(fd, hdb_lock_buffer, 11); + if (fd >= 0) { + pid = getpid(); +#ifndef PID_BINARY + slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%010d\n", pid); + write (fd, hdb_lock_buffer, 11); +#else + write(fd, &pid, sizeof (pid)); +#endif close(fd); return 0; - } + } /* * If the file exists then check to see if the pid is stale */ - if (errno == EEXIST) - { + if (errno == EEXIST) { fd = open(lock_file, O_RDONLY, 0); - if (fd < 0) - { + if (fd < 0) { if (errno == ENOENT) /* This is just a timing problem. */ - { continue; - } break; - } + } /* Read the lock file to find out who has the device locked */ n = read (fd, hdb_lock_buffer, 11); close (fd); - if (n < 0) - { - syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file); + if (n < 0) { + error("Can't read pid from lock file %s", lock_file); break; - } + } /* See the process still exists. */ - if (n > 0) - { + if (n > 0) { +#ifndef PID_BINARY hdb_lock_buffer[n] = '\0'; sscanf (hdb_lock_buffer, " %d", &pid); - if (kill(pid, 0) == -1 && errno == ESRCH) - { +#else + pid = ((int *) hdb_lock_buffer)[0]; +#endif + if (pid == 0 || pid == getpid() + || (kill(pid, 0) == -1 && errno == ESRCH)) n = 0; - } - } + } /* If the process does not exist then try to remove the lock */ - if (n == 0 && unlink (lock_file) == 0) - { - syslog (LOG_NOTICE, "Removed stale lock on %s (pid %d)", + if (n == 0 && unlink (lock_file) == 0) { + notice("Removed stale lock on %s (pid %d)", dev, pid); continue; - } + } - syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid); + notice("Device %s is locked by pid %d", dev, pid); break; - } + } - syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file); + error("Can't create lock file %s: %m(%d)", lock_file, errno); break; - } + } free(lock_file); lock_file = NULL; return -1; +#endif } -/* + +/******************************************************************** + * * unlock - remove our lockfile */ void unlock(void) - { - if (lock_file) - { +{ + if (lock_file) { +#ifdef LOCKLIB + (void) rmlock (lock_file, (void *) 0); +#else unlink(lock_file); +#endif free(lock_file); lock_file = NULL; - } - } + } +} + +/******************************************************************** + * + * sifvjcomp - config tcp header compression + */ + +int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) +{ + u_int x = get_flags(); + + if (vjcomp) { + if (ioctl (ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { + if (! ok_error (errno)) + error("ioctl(PPPIOCSMAXCID): %m(%d)", errno); + vjcomp = 0; + } + } + + x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP; + x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID; + set_flags (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(%d)", errno); + 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(%d)", errno); + return 0; + } + if_is_up = 1; + return 1; +} + +/******************************************************************** + * + * sifdown - Config the interface down and disable IP. + */ + +int sifdown (int u) +{ + struct ifreq ifr; + + if_is_up = 0; + + 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(%d)", errno); + 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(%d)", errno); + return 0; + } + return 1; +} + +/******************************************************************** + * + * sifaddr - Config the interface IP addresses and netmask. + */ + +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 + */ + ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr; + if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (errno != EEXIST) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFADDR): %m(%d)", errno); + } + else { + warn("ioctl(SIOCSIFADDR): Address already exists"); + } + return (0); + } +/* + * Set the gateway address + */ + ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr; + if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFDSTADDR): %m(%d)", errno); + return (0); + } +/* + * 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) { + ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask; + if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCSIFNETMASK): %m(%d)", errno); + 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; + + ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L; + ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr; + rt.rt_flags = RTF_UP | RTF_HOST; + + if (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; + } + + if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) { + if (! ok_error (errno)) + error("ioctl(SIOCADDRT) device route: %m(%d)", errno); + return (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 rtentry rt; + + if (kernel_version < KVERSION(2,1,16)) { +/* + * Delete the route through the device + */ + 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; + + ((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 (kernel_version > KVERSION(2,1,0)) { + SET_SA_FAMILY (rt.rt_genmask, AF_INET); + ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L; + } + + if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) { + if (still_ppp() && ! ok_error (errno)) + error("ioctl(SIOCDELRT) device route: %m(%d)", errno); + return (0); + } + } + return 1; +} + +/* + * get_pty - get a pty master/slave pair and chown the slave side + * to the uid given. Assumes slave_name points to >= 12 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; + char pty_name[12]; + struct termios tios; + + sfd = -1; + 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) + break; + close(mfd); + } + } + if (sfd < 0) + return 0; + + strlcpy(slave_name, pty_name, 12); + *master_fdp = mfd; + *slave_fdp = sfd; + fchown(sfd, uid, -1); + fchmod(sfd, S_IRUSR | S_IWUSR); + if (tcgetattr(sfd, &tios) == 0) { + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB); + tios.c_cflag |= CS8 | CREAD; + tios.c_iflag = IGNPAR | CLOCAL; + 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 +open_ppp_loopback(void) +{ + int flags; + + 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(%d)", errno); + + 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(%d)", errno); + + if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0) + fatal("ioctl(TIOCSETD): %m(%d)", errno); +/* + * Find out which interface we were given. + */ + if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) + fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno); +/* + * Enable debug in the driver if requested. + */ + set_kdebugflag (kdebugflag); + + return master_fd; +} + +/******************************************************************** + * + * restore_loop - reattach the ppp unit to the loopback. + * + * The kernel ppp driver automatically reattaches the ppp unit to + * the loopback if the serial port is set to a line discipline other + * than ppp, or if it detects a modem hangup. The former will happen + * in disestablish_ppp if the latter hasn't already happened, so we + * shouldn't need to do anything. + * + * Just to be sure, set the real serial port to the normal discipline. + */ + +void +restore_loop(void) +{ + if (ppp_fd != slave_fd) { + (void) ioctl(ppp_fd, TIOCSETD, &tty_disc); + set_ppp_fd(slave_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_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) { + if (! ok_error (errno)) { + error("ioctl(PPPIOCSNPMODE, %d, %d): %m (%d)", + proto, mode, errno); + error("ppp_fd=%d slave_fd=%d\n", ppp_fd, slave_fd); + } + 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 (%d)", errno); + 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 (%d)", errno); + } + else { + warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists"); + } + } + close (skfd); + } +#endif + return result; +} + +/******************************************************************** + * + * cipxfaddr - Clear the information for the IPX network. The IPX routes + * are removed and the device is no longer able to pass IPX + * frames. + */ + +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 (%d)", errno); + 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 (%d)", errno); + result = 0; + } + close (skfd); + } +#endif + return result; +} + +/* + * daemon - Detach us from controlling terminal session. + */ +int +daemon(nochdir, noclose) + int nochdir, noclose; +{ + int pid; + + if ((pid = fork()) < 0) + return -1; + if (pid != 0) + exit(0); /* parent dies */ + setsid(); + if (!nochdir) + chdir("/"); + if (!noclose) { + fclose(stdin); /* don't need stdin, stdout, stderr */ + fclose(stdout); + fclose(stderr); + } + return 0; +} + +/* + * Use the hostname as part of the random number seed. + */ +int +get_host_seed() +{ + 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 + struct stat stat_buf; +/* + * Disable the IPX protocol if the support is not present in the kernel. + * If we disable it then ensure that IP support is enabled. + */ + while (ipxcp_protent.enabled_flag) { + if (path_to_procfs()) { + strlcat (route_buffer, "/net/ipx_interface", sizeof(route_buffer)); + if (lstat (route_buffer, &stat_buf) >= 0) + break; + } + error("IPX support is not present in the kernel\n"); + ipxcp_protent.enabled_flag = 0; + ipcp_protent.enabled_flag = 1; + break; + } +#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; + } + return 1; +}