* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-/*
- * TODO:
- */
-
-#include <stdio.h>
-#include <syslog.h>
-#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/errno.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
+#include <sys/sysmacros.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <string.h>
+#include <time.h>
+#include <memory.h>
+#include <utmp.h>
#include <mntent.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <termios.h>
+#include <unistd.h>
+
+/* 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 <asm/types.h> /* glibc 2 conflicts with linux/types.h */
#include <net/if.h>
-#include <linux/ppp.h>
+#include <net/if_arp.h>
+#include <net/route.h>
+#include <netinet/if_ether.h>
+#else
+#include <linux/types.h>
+#include <linux/if.h>
+#include <linux/if_arp.h>
#include <linux/route.h>
#include <linux/if_ether.h>
+#endif
#include <netinet/in.h>
-#include <net/if_ppp.h>
+#include <arpa/inet.h>
+
+#include <linux/ppp_defs.h>
+#include <linux/if_ppp.h>
#include "pppd.h"
-#include "ppp.h"
#include "fsm.h"
#include "ipcp.h"
-static int initdisc = -1; /* Initial TTY discipline */
-static int prev_kdebugflag = 0;
-extern int kdebugflag;
-extern u_long netmask;
+#ifdef IPX_CHANGE
+#include "ipxcp.h"
+#if __GLIBC__ >= 2 && \
+ !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
+#include <netipx/ipx.h>
+#else
+#include <linux/ipx.h>
+#endif
+#endif /* IPX_CHANGE */
+
+#ifdef PPP_FILTER
+#include <net/bpf.h>
+#include <linux/filter.h>
+#endif /* PPP_FILTER */
+
+#ifdef LOCKLIB
+#include <sys/locks.h>
+#endif
+
+#ifdef INET6
+#ifndef _LINUX_IN6_H
+/*
+ * This is in linux/include/net/ipv6.h.
+ */
-#define MAX_IFS 32
+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)
+
+#endif /* INET6 */
+
+/* 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 */
+static 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_is_old = 0;
+static int restore_term = 0; /* 1 => we've munged the terminal */
+static struct termios inittermios; /* Initial TTY termios */
+
+static 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 get_flags (int fd);
+static void set_flags (int fd, int flags);
+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);
-/* prototypes */
-void die __ARGS((int));
+extern u_char inpacket_buf[]; /* borrowed from main.c */
/*
* SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
addr.sa_family = (family);
/*
- * set_kdebugflag - Define the debugging level for the kernel
+ * Determine if the PPP connection should still be present.
*/
-int set_kdebugflag (int requested_level)
+extern int hungup;
+
+/* new_fd is the fd of a tty */
+static void set_ppp_fd (int new_fd)
{
- if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m");
- return (0);
- }
+ SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd));
+ ppp_fd = new_fd;
+ if (!new_style_driver)
+ ppp_dev_fd = new_fd;
+}
- if (prev_kdebugflag != requested_level) {
- if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
- return (0);
+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;
}
- syslog(LOG_INFO, "set kernel debugging level to %d", requested_level);
- }
- return (1);
+ return 0;
}
-/*
- * establish_ppp - Turn the serial port into a ppp interface.
+/********************************************************************
+ *
+ * Functions to read and set the flags value in the device driver
*/
-void establish_ppp (void)
-{
- int pppdisc = N_PPP;
+static int get_flags (int fd)
+{
+ int flags;
- if (ioctl(fd, TIOCEXCL, 0) < 0) {
- syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
+ if ( ok_error (errno) )
+ flags = 0;
+ else
+ fatal("ioctl(PPPIOCGFLAGS): %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);
+ SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
+ return flags;
+}
+
+/********************************************************************/
+
+static void set_flags (int fd, int flags)
+{
+ SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
+
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) {
+ if (! ok_error (errno) )
+ fatal("ioctl(PPPIOCSFLAGS, %x): %m", flags, errno);
}
+}
+
+/********************************************************************
+ *
+ * sys_init - System-dependent initialization.
+ */
- if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
- die (1);
+void sys_init(void)
+{
+ int flags;
+
+ if (new_style_driver) {
+ 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");
}
- set_kdebugflag (kdebugflag);
+ /* 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
+
+ FD_ZERO(&in_fds);
+ max_in_fd = 0;
}
-/*
- * disestablish_ppp - Restore the serial port to normal operation.
+/********************************************************************
+ *
+ * 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 disestablish_ppp(void)
+void sys_cleanup(void)
{
- int x;
- char *s;
+/*
+ * 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 (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) {
- 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";
- break;
- case SC_RCV_B7_1:
- s = "bit 7 set to 0";
- break;
- case SC_RCV_EVNP:
- s = "odd parity";
- break;
- case SC_RCV_ODDP:
- s = "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);
- }
- }
+ if (has_proxy_arp)
+ cifproxyarp(0, proxy_arp_addr);
+}
- if (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+/********************************************************************
+ *
+ * sys_close - Clean up in a child process before execing.
+ */
+void
+sys_close(void)
+{
+ if (new_style_driver)
+ close(ppp_dev_fd);
+ if (sock_fd >= 0)
+ close(sock_fd);
+ if (slave_fd >= 0)
+ close(slave_fd);
+ if (master_fd >= 0)
+ close(master_fd);
+ closelog();
+}
- if (ioctl(fd, TIOCNXCL, 0) < 0)
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
+/********************************************************************
+ *
+ * set_kdebugflag - Define the debugging level for the kernel
+ */
- initdisc = -1;
+static int set_kdebugflag (int requested_level)
+{
+ if (new_style_driver && ifunit < 0)
+ return 1;
+ if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) {
+ if ( ! ok_error (errno) )
+ error("ioctl(PPPIOCSDEBUG): %m");
+ return (0);
}
+ SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
+ requested_level));
+ return (1);
}
-/*
- * output - Output PPP packet.
+/********************************************************************
+ *
+ * tty_establish_ppp - Turn the serial port into a ppp interface.
*/
-void output (int unit, unsigned char *p, int len)
+int tty_establish_ppp (int tty_fd)
{
- if (unit != 0)
- MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
+ int x;
+ int fd = -1;
- if (debug)
- log_packet(p, len, "sent ");
-
- if (write(fd, p, len) < 0) {
- syslog(LOG_ERR, "write: %m");
- die(1);
+/*
+ * 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");
}
-}
-
/*
- * read_packet - get a PPP packet from the serial device.
+ * 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");
+ return -1;
+ }
+/*
+ * Set the current tty to the PPP discpline
*/
-int read_packet (unsigned char *buf)
-{
- int len;
-
- len = read(fd, buf, MTU + DLLHEADERLEN);
- if (len < 0) {
- if (errno == EWOULDBLOCK) {
-#if 0
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
+#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;
}
- syslog(LOG_ERR, "read(fd): %m");
- die(1);
}
- return len;
+
+ if (new_style_driver) {
+ /* Open another instance of /dev/ppp and connect the channel to it */
+ int flags;
+
+ if (ioctl(tty_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;
+ }
+ 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)
+ set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) & ~SC_LOOP_TRAFFIC);
+
+ 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 (tty_fd);
+ if (ioctl(tty_fd, PPPIOCGUNIT, &x) < 0) {
+ if (ok_error (errno))
+ goto err;
+ fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
+ }
+ /* 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(tty_fd, F_GETFL);
+ if (initfdflags == -1 ||
+ fcntl(tty_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
+ if ( ! ok_error (errno))
+ warn("Couldn't set device to non-blocking mode: %m");
+ }
+ }
+
+ looped = 0;
+
+ /*
+ * Enable debug in the driver if requested.
+ */
+ if (!looped)
+ set_kdebugflag (kdebugflag);
+
+#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)
+
+ set_flags(ppp_fd, ((get_flags(ppp_fd) & ~(SC_RCVB | SC_LOGB))
+ | ((kdebugflag * SC_DEBUG) & SC_LOGB)));
+
+ 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:
+ if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0 && !ok_error(errno))
+ warn("Couldn't reset tty to normal line discipline: %m");
+ return -1;
}
-/*
- * ppp_send_config - configure the transmit characteristics of
- * the ppp interface.
+/********************************************************************
+ *
+ * tty_disestablish_ppp - Restore the serial port 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 ppp_send_config (int unit,int mtu,u_long asyncmap,int pcomp,int accomp)
+
+void tty_disestablish_ppp(int tty_fd)
{
- 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(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
- quit();
- }
+ if (!hungup) {
+/*
+ * Flush the tty output buffer so that the TIOCSETD doesn't hang.
+ */
+ if (tcflush(tty_fd, TCIOFLUSH) < 0)
+ warn("tcflush failed: %m");
+/*
+ * 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(tty_fd, TIOCNXCL, 0) < 0) {
+ if ( ! ok_error (errno))
+ warn("ioctl(TIOCNXCL): %m(%d)", errno);
+ }
- 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();
+ /* 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");
+ }
}
-
- x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
- x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
-
- MAINDEBUG ((LOG_DEBUG, "send_config: flags = %x\n", x));
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- quit();
+ initfdflags = -1;
+
+ if (new_style_driver) {
+ close(ppp_fd);
+ ppp_fd = -1;
+ if (demand) {
+ set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_LOOP_TRAFFIC);
+ looped = 1;
+ } else if (ifunit >= 0 && ioctl(ppp_dev_fd, PPPIOCDETACH) < 0)
+ error("Couldn't release PPP unit: %m");
+ if (!multilink)
+ remove_fd(ppp_dev_fd);
+ } else {
+ /* old-style driver */
+ if (demand)
+ set_ppp_fd(slave_fd);
}
}
/*
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ * make_ppp_unit - make a new ppp unit for ppp_dev_fd.
+ * Assumes new_style_driver.
*/
-void
-ppp_set_xaccm(unit, accm)
- int unit;
- ext_accm accm;
+static int make_ppp_unit()
{
- 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");
+ int x;
+
+ 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");
+ ifunit = -1;
+ x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+ }
+ if (x < 0)
+ error("Couldn't create new ppp unit: %m");
+ return x;
}
/*
- * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.
+ * cfg_bundle - configure the existing bundle.
+ * Used in demand mode.
*/
-void ppp_recv_config (int unit,int mru,u_long asyncmap,int pcomp,int accomp)
+void cfg_bundle(int mrru, int mtru, int rssn, int tssn)
{
- u_int x;
+ int flags;
- MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
- if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
- syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
+ if (!new_style_driver)
+ return;
- MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(fd, PPPIOCRASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCRASYNCMAP): %m");
- quit();
- }
-
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- quit();
- }
+ /* set the mrru, mtu and flags */
+ if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0)
+ error("Couldn't set MRRU: %m");
+ flags = get_flags(ppp_dev_fd);
+ flags &= ~(SC_MP_SHORTSEQ | SC_MP_XSHORTSEQ);
+ flags |= (rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0)
+ | (mrru? SC_MULTILINK: 0);
- 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();
- }
+ set_flags(ppp_dev_fd, flags);
+
+ /* 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);
}
/*
- * sifvjcomp - config tcp header compression
+ * 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;
-int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
+ /* 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)
{
- u_int x;
+ if (!new_style_driver)
+ return -1;
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- return 0;
- }
+ if (ioctl(ppp_dev_fd, PPPIOCATTACH, &ifnum) < 0) {
+ if (errno == ENXIO)
+ 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);
+ set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_MULTILINK);
- x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
- x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
+ ifunit = ifnum;
+ return 1;
+}
- if(ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
+/********************************************************************
+ *
+ * clean_check - Fetch the flags for the device and generate
+ * appropriate error messages.
+ */
+void clean_check(void)
+{
+ int x;
+ char *s;
- if (vjcomp) {
- if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 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 = "all had bit 7 set to 1";
+ break;
+
+ case SC_RCV_B7_1:
+ s = "all had bit 7 set to 0";
+ break;
+
+ case SC_RCV_EVNP:
+ s = "all had odd parity";
+ break;
+
+ case SC_RCV_ODDP:
+ s = "all had even parity";
+ break;
+ }
+
+ if (s != NULL) {
+ warn("Receive serial link is not 8-bit clean:");
+ warn("Problem: %s", s);
+ }
+ }
}
-
- return 1;
}
+
/*
- * sifup - Config the interface up and enable IP packets to pass.
+ * List of valid speeds.
+ */
+
+struct speed {
+ int speed_int, speed_val;
+} speeds[] = {
+#ifdef B50
+ { 50, B50 },
+#endif
+#ifdef B75
+ { 75, B75 },
+#endif
+#ifdef B110
+ { 110, B110 },
+#endif
+#ifdef B134
+ { 134, B134 },
+#endif
+#ifdef B150
+ { 150, B150 },
+#endif
+#ifdef B200
+ { 200, B200 },
+#endif
+#ifdef B300
+ { 300, B300 },
+#endif
+#ifdef B600
+ { 600, B600 },
+#endif
+#ifdef B1200
+ { 1200, B1200 },
+#endif
+#ifdef B1800
+ { 1800, B1800 },
+#endif
+#ifdef B2000
+ { 2000, B2000 },
+#endif
+#ifdef B2400
+ { 2400, B2400 },
+#endif
+#ifdef B3600
+ { 3600, B3600 },
+#endif
+#ifdef B4800
+ { 4800, B4800 },
+#endif
+#ifdef B7200
+ { 7200, B7200 },
+#endif
+#ifdef B9600
+ { 9600, B9600 },
+#endif
+#ifdef B19200
+ { 19200, B19200 },
+#endif
+#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 B230400
+ { 230400, B230400 },
+#endif
+#ifdef B460800
+ { 460800, B460800 },
+#endif
+#ifdef B921600
+ { 921600, B921600 },
+#endif
+ { 0, 0 }
+};
+
+/********************************************************************
+ *
+ * Translate from bits/second to a speed_t.
*/
-int sifup (int u)
+static int translate_speed (int bps)
{
- struct ifreq ifr;
+ struct speed *speedp;
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
+ 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;
+}
- ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
- 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 == speedp->speed_val)
+ return speedp->speed_int;
+ }
}
- return 1;
+ return 0;
}
-/*
- * sifdown - Config the interface down and disable IP.
+/********************************************************************
+ *
+ * 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 tty_fd, int local)
+{
+ int speed;
+ struct termios tios;
+
+ 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;
+
+ tios.c_iflag = IGNBRK | IGNPAR;
+ tios.c_oflag = 0;
+ tios.c_lflag = 0;
+ tios.c_cc[VMIN] = 1;
+ tios.c_cc[VTIME] = 0;
+
+ 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);
+ }
+/*
+ * 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);
+ }
+
+ if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0)
+ if (!ok_error(errno))
+ fatal("tcsetattr: %m");
+
+ 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 tty_fd, int on)
+{
+ int modembits = TIOCM_DTR;
+
+ ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
+}
+
+/********************************************************************
+ *
+ * restore_tty - restore the terminal to the saved settings.
+ */
+
+void restore_tty (int tty_fd)
+{
+ if (restore_term) {
+ 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");
+ }
+ }
+}
+
+/********************************************************************
+ *
+ * output - Output PPP packet.
+ */
+
+void output (int unit, unsigned char *p, int len)
+{
+ int fd = ppp_fd;
+ int proto;
+
+ if (debug)
+ dbglog("sent %P", p, len);
+
+ if (len < PPP_HDRLEN)
+ return;
+ if (new_style_driver) {
+ p += 2;
+ len -= 2;
+ proto = (p[0] << 8) + p[1];
+ if (ifunit >= 0 && !(proto >= 0xc000 || proto == PPP_CCPFRAG))
+ fd = ppp_dev_fd;
+ }
+ if (write(fd, p, len) < 0) {
+ if (errno == EWOULDBLOCK || 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,
+ * for the length of time specified by *timo (indefinite
+ * if timo is NULL).
+ */
+
+void wait_input(struct timeval *timo)
+{
+ fd_set ready, exc;
+ int n;
+
+ ready = in_fds;
+ exc = in_fds;
+ n = select(max_in_fd + 1, &ready, NULL, &exc, timo);
+ if (n < 0 && errno != EINTR)
+ 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);
+}
+
+
+/********************************************************************
+ *
+ * read_packet - get a PPP packet from the serial device.
+ */
+
+int read_packet (unsigned char *buf)
+{
+ 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 != EIO && errno != EINTR)
+ error("read: %m");
+ if (nr < 0 && errno == ENXIO)
+ return 0;
+ }
+ if (nr < 0 && new_style_driver && ifunit >= 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 != EIO && errno != EINTR)
+ error("read /dev/ppp: %m");
+ if (nr < 0 && errno == ENXIO)
+ return 0;
+ }
+ return (new_style_driver && nr > 0)? nr+2: nr;
+}
+
+/********************************************************************
+ *
+ * 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;
+
+ if (new_style_driver) {
+ while ((n = read_packet(inpacket_buf)) > 0)
+ if (loop_frame(inpacket_buf, n))
+ rv = 1;
+ return rv;
+ }
+
+ while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0)
+ if (loop_chars(inbuf, n))
+ rv = 1;
+
+ if (n == 0)
+ fatal("eof on loopback");
+
+ if (errno != EWOULDBLOCK)
+ fatal("read from loopback: %m(%d)", errno);
+
+ return rv;
+}
+
+/*
+ * netif_set_mtu - set the MTU on the PPP network interface.
+ */
+void
+netif_set_mtu(int unit, int mtu)
+{
+ 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)
+ fatal("ioctl(SIOCSIFMTU): %m");
+}
+
+/********************************************************************
+ *
+ * tty_send_config - configure the transmit characteristics of
+ * the ppp interface.
+ */
+
+void tty_send_config (int mtu,u_int32_t asyncmap,int pcomp,int accomp)
+{
+ u_int x;
+
+/*
+ * Set the asyncmap and other parameters for the ppp device
+ */
+ if (!still_ppp())
+ return;
+ link_mtu = mtu;
+ 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(ppp_fd);
+ 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(ppp_fd, x);
+}
+
+/********************************************************************
+ *
+ * tty_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+
+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 (!still_ppp())
+ return;
+ if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) {
+ if ( ! ok_error (errno))
+ warn("ioctl(set extended ACCM): %m(%d)", errno);
+ }
+}
+
+/********************************************************************
+ *
+ * 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)
+{
+ 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(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+ if ( ! ok_error (errno))
+ error("ioctl(PPPIOCSMRU): %m(%d)", errno);
+ }
+ if (new_style_driver && ifunit >= 0
+ && ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
+ error("Couldn't set MRU in generic PPP layer: %m");
+
+ 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);
+ }
+}
+
+/********************************************************************
+ *
+ * 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));
+ data.ptr = opt_ptr;
+ data.length = opt_len;
+ data.transmit = for_transmit;
+
+ if (ioctl(ppp_dev_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() && ifunit >= 0) {
+ int x = get_flags(ppp_dev_fd);
+ x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
+ x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP;
+ set_flags (ppp_dev_fd, x);
+ }
+}
+
+#ifdef PPP_FILTER
+/*
+ * 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 */
+
+/********************************************************************
+ *
+ * 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;
+}
+
+/********************************************************************
+ *
+ * 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;
+ stats->pkts_in = req.stats.p.ppp_ipackets;
+ stats->pkts_out = req.stats.p.ppp_opackets;
+ 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(ppp_dev_fd);
+
+ return x & SC_DC_FERROR;
+}
+
+/********************************************************************
+ *
+ * path_to_procfs - find the path to the proc file system mount point
+ */
+static char proc_path[MAXPATHLEN];
+static int proc_path_len;
+
+static char *path_to_procfs(const char *tail)
+{
+ struct mntent *mntent;
+ FILE *fp;
+
+ 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);
+ }
+ }
+
+ strlcpy(proc_path + proc_path_len, tail,
+ sizeof(proc_path) - proc_path_len);
+ return proc_path;
+}
+
+/*
+ * /proc/net/route parsing stuff.
+ */
+#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;
+
+static int open_route_table (void);
+static void close_route_table (void);
+static int read_route_table (struct rtentry *rt);
+
+/********************************************************************
+ *
+ * close_route_table - close the interface to the route table
+ */
+
+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;
+
+ close_route_table();
+
+ path = path_to_procfs("/net/route");
+ route_fd = fopen (path, "r");
+ if (route_fd == NULL) {
+ error("can't open routing table %s: %m", path);
+ 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)
+{
+ char *cols[ROUTE_MAX_COLS], *p;
+ int col;
+
+ memset (rt, '\0', sizeof (struct rtentry));
+
+ if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
+ return 0;
+
+ 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;
+ }
+
+ 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(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 (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)
+ continue;
+
+ 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, u_int32_t ouraddr, u_int32_t gateway)
+{
+ struct rtentry rt;
+
+ 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);
+
+ 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(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, 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);
+
+ 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(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;
+ char *forw_path;
+
+ if (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;
+/*
+ * Get the hardware address of an interface on the same subnet
+ * as our local address.
+ */
+ 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(%d)", errno);
+ 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;
+
+ 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(%d)", errno);
+ return 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,
+ char *name, int namelen)
+{
+ struct ifreq *ifr, *ifend;
+ u_int32_t ina, mask;
+ char *aliasp;
+ struct ifreq ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
+ if ( ! ok_error ( errno ))
+ error("ioctl(SIOCGIFCONF): %m(%d)", errno);
+ return 0;
+ }
+
+ 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 = 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
+ * nor loopback.
+ */
+ 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(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;
+
+ strlcpy(name, ifreq.ifr_name, namelen);
+
+ /* trim off the :1 in eth0:1 */
+ aliasp = strchr(name, ':');
+ if (aliasp != 0)
+ *aliasp = 0;
+
+ info("found interface %s for proxy arp", name);
+/*
+ * Now get the hardware address.
+ */
+ memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
+ 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));
+
+ 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)[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
+ * any non-point-to-point interfaces which might appear to be on the same
+ * network as `addr'. If we find any, we OR in their netmask to the
+ * user-specified netmask.
+ */
+
+u_int32_t GetMask (u_int32_t addr)
+{
+ u_int32_t mask, nmask, ina;
+ struct ifreq *ifr, *ifend, ifreq;
+ struct ifconf ifc;
+ 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;
+ else
+ nmask = IN_CLASSC_NET;
+
+ /* class D nets are disallowed by bad_ip_adrs */
+ mask = netmask | htonl(nmask);
+/*
+ * Scan through the system's network interfaces.
+ */
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ 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++) {
+/*
+ * Check the interface's internet address.
+ */
+ if (ifr->ifr_addr.sa_family != AF_INET)
+ continue;
+ ina = SIN_ADDR(ifr->ifr_addr);
+ if (((ntohl(ina) ^ addr) & nmask) != 0)
+ continue;
+/*
+ * 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 ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
+ continue;
+/*
+ * Get its netmask and OR it into our mask.
+ */
+ if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ 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, &endp, 10);
+ *modification = 0;
+ *patch = 0;
+
+ 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);
+ }
+ }
+}
+
+/********************************************************************
+ *
+ * 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(%d)", errno);
+ } 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, fd;
+ struct ifreq ifr;
+ 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;
+
+ 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)
+ ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
+
+ if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != 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) {
+ char abBuffer [1024];
+
+ 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(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
+
+/*
+ * 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 */;
+
+ /* 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)
+ 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 = get_flags(ppp_dev_fd);
+
+ if (vjcomp) {
+ if (ioctl (ppp_dev_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 (ppp_dev_fd, 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++;
+
+ 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;
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
+ 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(%d)", errno);
return 0;
}
ifr.ifr_flags &= ~IFF_UP;
ifr.ifr_flags |= IFF_POINTOPOINT;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ 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, int our_adr, int his_adr, int net_mask)
+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);
- strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ 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(s, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
- if (errno != EEXIST)
- syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m");
- else
- syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
+ 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(%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(s, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
+ SIN_ADDR(ifr.ifr_dstaddr) = 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
+ * 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(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
+ SIN_ADDR(ifr.ifr_netmask) = 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
*/
- 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 */
+ 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;
+ }
- ((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(sock_fd, SIOCADDRT, &rt) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCADDRT) device route: %m(%d)", errno);
+ return (0);
+ }
+ }
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m");
- return (0);
+ /* 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, int our_adr, int his_adr)
+int cifaddr (int unit, u_int32_t our_adr, u_int32_t 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(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
- return (0);
- }
- return 1;
-}
+ struct ifreq ifr;
+ if (kernel_version < KVERSION(2,1,16)) {
/*
- * path_to_route - determine the path to the proc file system data
+ * Delete the route through the device
*/
+ struct rtentry rt;
+ memset (&rt, '\0', sizeof (rt));
-FILE *route_fd = (FILE *) 0;
-static char route_buffer [100];
-
-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
- */
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ rt.rt_dev = ifname;
-static char *path_to_route (void)
-{
- struct mntent *mntent;
- FILE *fp;
+ SIN_ADDR(rt.rt_gateway) = 0;
+ SIN_ADDR(rt.rt_dst) = his_adr;
+ rt.rt_flags = RTF_UP | RTF_HOST;
- fp = fopen (MOUNTED, "r");
- if (fp != 0) {
- while ((mntent = getmntent (fp)) != 0) {
- if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) == 0)
- continue;
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ SIN_ADDR(rt.rt_genmask) = -1L;
+ }
- 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");
+ 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);
+ }
+ }
- fclose (fp);
- return (route_buffer);
- }
+ /* 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(%d)", errno);
+ return 0;
}
- fclose (fp);
}
- syslog (LOG_ERR, "proc file system not mounted");
- return 0;
+
+ our_old_addr = our_adr;
+
+ return 1;
}
-/*
- * open_route_table - open the interface to the route table
+#ifdef INET6
+/********************************************************************
+ *
+ * sif6addr - Config the interface with an IPv6 link-local address
*/
-
-static int open_route_table (void)
+int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
{
- char *path;
-
- if (route_fd != (FILE *) 0)
- close_route_table();
-
- path = path_to_route();
- if (path == NULL)
- return 0;
+ struct in6_ifreq ifr6;
+ struct ifreq ifr;
+ struct in6_rtmsg rt6;
- route_fd = fopen (path, "r");
- if (route_fd == (FILE *) 0) {
- syslog (LOG_ERR, "can not open %s: %m", path);
- return 0;
+ if (sock6_fd < 0) {
+ errno = -sock6_fd;
+ error("IPv6 socket creation failed: %m");
+ return 0;
}
-
- /* read and discard the header line. */
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) {
- close_route_table();
+ 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 (%d)", errno);
+ 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 (%d)", errno);
+ 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 (%d)", errno);
return 0;
}
+
return 1;
}
-/*
- * close_route_table - close the interface to the route table
- */
-static void close_route_table (void)
+/********************************************************************
+ *
+ * cif6addr - Remove IPv6 address from interface
+ */
+int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
{
- if (route_fd != (FILE *) 0) {
- fclose (route_fd);
- route_fd = (FILE *) 0;
+ 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 (%d)", errno);
+ 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 (%d)", errno);
+ }
+ else {
+ warn("cif6addr: ioctl(SIOCDIFADDR): No such address");
+ }
+ return (0);
}
+ return 1;
}
+#endif /* INET6 */
/*
- * read_route_table - read the next entry from the route table
+ * 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.
*/
-
-static int read_route_table (struct rtentry *rt)
+int
+get_pty(master_fdp, slave_fdp, slave_name, uid)
+ int *master_fdp;
+ int *slave_fdp;
+ char *slave_name;
+ int uid;
{
- 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;
-
- 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 0
- ptr = strtok (NULL, delims); /* reference count */
- ptr = strtok (NULL, delims); /* useage count */
- ptr = strtok (NULL, delims); /* metric */
- ptr = strtok (NULL, delims); /* mask */
+ 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);
+ }
+ }
+ }
- ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
- strtoul (dst_ptr, NULL, 16);
-
- ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul (gw_ptr, NULL, 16);
+ if (sfd < 0)
+ return 0;
- rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16);
- rt->rt_dev = dev_ptr;
+ 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;
}
-/*
- * defaultroute_exists - determine if there is a default route
+/********************************************************************
+ *
+ * open_loopback - open the device we use for getting packets
+ * in demand mode. Under Linux, we use a pty master/slave pair.
*/
-
-static int defaultroute_exists (void)
+int
+open_ppp_loopback(void)
{
- struct rtentry rt;
- int result = 0;
+ int flags;
+
+ looped = 1;
+ if (new_style_driver) {
+ /* allocate ourselves a ppp unit */
+ if (make_ppp_unit() < 0)
+ die(1);
+ set_flags(ppp_dev_fd, SC_LOOP_TRAFFIC);
+ set_kdebugflag(kdebugflag);
+ ppp_fd = -1;
+ return ppp_dev_fd;
+ }
- if (!open_route_table())
- return 0;
+ if (!get_pty(&master_fd, &slave_fd, loop_name, 0))
+ fatal("No free pty for loopback");
+ SYSDEBUG(("using %s for loopback", loop_name));
- while (read_route_table(&rt) != 0) {
- if (rt.rt_flags & RTF_UP == 0)
- continue;
+ set_ppp_fd(slave_fd);
- 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;
- break;
- }
- }
- close_route_table();
- return result;
-}
+ 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);
/*
- * sifdefaultroute - assign a default route through the address given.
+ * 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);
-int sifdefaultroute (int unit, int gateway)
-{
- struct rtentry rt;
-
- if (defaultroute_exists())
- 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_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
- return 0;
- }
- return 1;
+ return master_fd;
}
-/*
- * cifdefaultroute - delete a default route through the address given.
+/********************************************************************
+ *
+ * sifnpmode - Set the mode for handling packets for a given NP.
*/
-int cifdefaultroute (int unit, int gateway)
+int
+sifnpmode(u, proto, mode)
+ int u;
+ int proto;
+ enum NPmode mode;
{
- struct rtentry 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_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
+ 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 (%d)",
+ proto, mode, errno);
return 0;
}
return 1;
}
-/*
- * sifproxyarp - Make a proxy ARP entry for the peer.
+\f
+/********************************************************************
+ *
+ * sipxfaddr - Config the interface IPX networknumber
*/
-int sifproxyarp (int unit, u_long his_adr)
+int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
{
- struct arpreq arpreq;
-
- memset (&arpreq, '\0', sizeof(arpreq));
+ 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;
/*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
+ * Set the IPX device
*/
- 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(s, SIOCSARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
- return 0;
+ 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);
}
- return 1;
+#endif
+ return result;
}
-/*
- * cifproxyarp - Delete the proxy ARP entry for the peer.
+/********************************************************************
+ *
+ * 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 cifproxyarp (int unit, u_long his_adr)
+int cipxfaddr (int unit)
{
- 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(s, SIOCDARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
- return 0;
+ 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;
}
- return 1;
-}
-
-/*
- * get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr.
- */
+ else {
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-int get_ether_addr (u_long ipaddr, struct sockaddr *hwaddr)
-{
- struct ifreq *ifr, *ifend, *ifp;
- int i;
- u_long 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(s, SIOCGIFCONF, &ifc) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
- return 0;
- }
- MAINDEBUG ((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",
- ifreq.ifr_name));
-/*
- * Check that the interface is up, and not point-to-point
- * or loopback.
- */
- if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0)
- continue;
- if ((ifreq.ifr_flags &
- (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
- != (IFF_UP|IFF_BROADCAST))
- continue;
+ sipx->sipx_type = IPX_FRAME_ETHERII;
+ sipx->sipx_action = IPX_DLTITF;
+ sipx->sipx_family = AF_IPX;
/*
- * Get its netmask and check that it's on the right subnet.
+ * Set the IPX device
*/
- if (ioctl(s, 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 (((ipaddr ^ ina) & mask) != 0)
- continue;
- break;
+ if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (%d)", errno);
+ result = 0;
}
+ close (skfd);
}
-
- if (ifr >= ifend)
- return 0;
+#endif
+ return result;
+}
- syslog(LOG_INFO, "found interface %s for proxy arp", ifreq.ifr_name);
/*
- * Now get the hardware address.
+ * Use the hostname as part of the random number seed.
*/
- if (ioctl (s, SIOCGIFHWADDR, &ifreq) < 0) {
- syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name);
- return 0;
- }
-
- hwaddr->sa_family = ARPHRD_ETHER;
- memcpy (&hwaddr->sa_data, &ifr->ifr_hwaddr, ETH_ALEN);
+int
+get_host_seed()
+{
+ int h;
+ char *p = hostname;
- MAINDEBUG ((LOG_DEBUG,
- "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x",
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[0],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[1],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[2],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[3],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[4],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[5]));
- return 1;
+ h = 407;
+ for (p = hostname; *p != 0; ++p)
+ h = h * 37 + *p;
+ return h;
}
-/*
- * ppp_available - check whether the system has any ppp interfaces
- * (in fact we check whether we can do an ioctl on ppp0).
+/********************************************************************
+ *
+ * sys_check_options - check the options that the user specified
*/
-int ppp_available(void)
+int
+sys_check_options(void)
{
- int s, ok;
- struct ifreq ifr;
-
- s = socket(AF_INET, SOCK_DGRAM, 0);
- if (s < 0)
- return 1; /* can't tell - maybe we're not root */
-
- strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
- ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
- close(s);
-
- return ok;
+#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;
}
projects / ppp.git / blobdiff