* sys-linux.c - System-dependent procedures for setting up
* PPP interfaces on Linux systems
*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * Copyright (c) 1994-2004 Paul Mackerras. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Derived from main.c and pppd.h, which are:
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For permission or any legal
+ * details, please contact
+ * Office of Technology Transfer
+ * Carnegie Mellon University
+ * 5000 Forbes Avenue
+ * Pittsburgh, PA 15213-3890
+ * (412) 268-4387, fax: (412) 268-7395
+ * tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Computing Services
+ * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#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 <sys/param.h>
+#include <errno.h>
+#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <string.h>
#include <time.h>
#include <memory.h>
+#ifdef HAVE_UTMP_H
#include <utmp.h>
+#endif
#include <mntent.h>
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
+#include <unistd.h>
+#include <limits.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
#define MAX_ADDR_LEN 7
#endif
+#if !defined(__GLIBC__) || __GLIBC__ >= 2
+#include <asm/types.h> /* glibc 2 conflicts with linux/types.h */
#include <net/if.h>
-#include <linux/ppp_defs.h>
#include <net/if_arp.h>
-#include <linux/if_ppp.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 <arpa/inet.h>
+
+#include <linux/ppp-ioctl.h>
+
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <linux/if_link.h>
+
+/* Attempt at retaining compile-support with older than 4.7 kernels, or kernels
+ * where RTM_NEWSTATS isn't defined for whatever reason.
+ */
+#ifndef RTM_NEWSTATS
+#define RTM_NEWSTATS 92
+#define RTM_GETSTATS 94
+#define IFLA_STATS_LINK_64 1
+#endif
+
+#include <linux/if_addr.h>
+
+/* glibc versions prior to 2.24 do not define SOL_NETLINK */
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
+/* linux kernel versions prior to 4.3 do not define/support NETLINK_CAP_ACK */
+#ifndef NETLINK_CAP_ACK
+#define NETLINK_CAP_ACK 10
+#endif
+
+/* linux kernel versions prior to 4.7 do not define/support IFLA_PPP_DEV_FD */
+#ifndef IFLA_PPP_MAX
+/* IFLA_PPP_DEV_FD is declared as enum when IFLA_PPP_MAX is defined */
+#define IFLA_PPP_DEV_FD 1
+#endif
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
-#ifdef IPX_CHANGE
-#include "ipxcp.h"
+#ifdef PPP_WITH_IPV6CP
+#include "eui64.h"
+#endif /* PPP_WITH_IPV6CP */
+
+#ifdef PPP_WITH_FILTER
+#include <pcap-bpf.h>
+#include <linux/filter.h>
+#endif /* PPP_WITH_FILTER */
+
+#ifdef LOCKLIB
+#include <sys/locks.h>
#endif
+/*
+ * Instead of system header file <termios.h> use local "termios_linux.h" header
+ * file as it provides additional support for arbitrary baud rates via BOTHER.
+ */
+#include "termios_linux.h"
+
+#ifdef PPP_WITH_IPV6CP
+#ifndef _LINUX_IN6_H
+/*
+ * This is in linux/include/net/ipv6.h.
+ */
+
+struct in6_ifreq {
+ struct in6_addr ifr6_addr;
+ __u32 ifr6_prefixlen;
+ unsigned int ifr6_ifindex;
+};
+#endif
+
+#define IN6_LLADDR_FROM_EUI64(sin6, eui64) do { \
+ memset(&(sin6).s6_addr, 0, sizeof(struct in6_addr)); \
+ (sin6).s6_addr16[0] = htons(0xfe80); \
+ eui64_copy(eui64, (sin6).s6_addr32[2]); \
+ } while (0)
+
+static const eui64_t nulleui64;
+#endif /* PPP_WITH_IPV6CP */
+
+/* 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 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;
+static int slave_fd = -1; /* pty for old-style demand mode, slave */
+static int master_fd = -1; /* pty for old-style demand mode, master */
+#ifdef PPP_WITH_IPV6CP
+static int sock6_fd = -1;
+#endif /* PPP_WITH_IPV6CP */
+
+/*
+ * For the old-style kernel driver, this is the same as ppp_fd.
+ * For the new-style driver, it is the fd of an instance of /dev/ppp
+ * which is attached to the ppp unit and is used for controlling it.
+ */
+int ppp_dev_fd = -1; /* fd for /dev/ppp (new style driver) */
+
+static int chindex; /* channel index (new style driver) */
+
+static fd_set in_fds; /* set of fds that wait_input waits for */
+static int max_in_fd; /* highest fd set in in_fds */
static int has_proxy_arp = 0;
static int driver_version = 0;
static int driver_modification = 0;
static int driver_patch = 0;
+static int driver_is_old = 0;
static int restore_term = 0; /* 1 => we've munged the terminal */
static struct termios inittermios; /* Initial TTY termios */
+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 int if6_is_up; /* Interface has been marked up for IPv6, to help differentiate */
+static int have_default_route; /* Gateway for default route added */
+static int have_default_route6; /* Gateway for default IPv6 route added */
+static struct rtentry old_def_rt; /* Old default route */
+static int default_rt_repl_rest; /* replace and restore old default rt */
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 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_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 (void);
-static void set_flags (int flags);
+static int modify_flags(int fd, int clear_bits, int set_bits);
static int translate_speed (int bps);
static int baud_rate_of (int speed);
-static 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 (struct rtentry *rt);
+static int defaultroute_exists (struct rtentry *rt, int metric);
+static int defaultroute6_exists (struct in6_rtmsg *rt, int metric);
static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr,
- char *name);
+ 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);
+static int setifstate (int u, int state);
extern u_char inpacket_buf[]; /* borrowed from main.c */
+extern int dfl_route_metric;
+
/*
* SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
* if it exists.
memset ((char *) &(addr), '\0', sizeof(addr)); \
addr.sa_family = (family);
+
/*
- * Determine if the PPP connection should still be present.
+ * rtnetlink_msg - send rtnetlink message, receive response
+ * and return received error code:
+ * 0 - success
+ * positive value - error during sending / receiving message
+ * negative value - rtnetlink responce error code
*/
+static int rtnetlink_msg(const char *desc, int *shared_fd, void *nlreq, size_t nlreq_len, void *nlresp_data, size_t *nlresp_size, unsigned nlresp_type)
+{
+ struct nlresp_hdr {
+ struct nlmsghdr nlh;
+ struct nlmsgerr nlerr;
+ } nlresp_hdr;
+ struct sockaddr_nl nladdr;
+ struct iovec iov[2];
+ struct msghdr msg;
+ ssize_t nlresp_len;
+ int one;
+ int fd;
+
+ if (shared_fd && *shared_fd >= 0) {
+ fd = *shared_fd;
+ } else {
+ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (fd < 0) {
+ error("rtnetlink_msg: socket(NETLINK_ROUTE): %m (line %d)", __LINE__);
+ return 1;
+ }
+
+ /*
+ * Tell kernel to not send to us payload of acknowledgment error message.
+ * NETLINK_CAP_ACK option is supported since Linux kernel version 4.3 and
+ * older kernel versions always send full payload in acknowledgment netlink
+ * message. We ignore payload of this message as we need only error code,
+ * to check if our set remote peer address request succeeded or failed.
+ * So ignore return value from the following setsockopt() call as setting
+ * option NETLINK_CAP_ACK means for us just a kernel hint / optimization.
+ */
+ one = 1;
+ setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &one, sizeof(one));
+
+ memset(&nladdr, 0, sizeof(nladdr));
+ nladdr.nl_family = AF_NETLINK;
+
+ if (bind(fd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) {
+ error("rtnetlink_msg: bind(AF_NETLINK): %m (line %d)", __LINE__);
+ close(fd);
+ return 1;
+ }
+
+ if (shared_fd)
+ *shared_fd = fd;
+ }
-extern int hungup;
-#define still_ppp() (hungup == 0)
+ memset(&nladdr, 0, sizeof(nladdr));
+ nladdr.nl_family = AF_NETLINK;
-#ifndef LOCK_PREFIX
-#define LOCK_PREFIX "/var/lock/LCK.."
-#endif
+ memset(&iov[0], 0, sizeof(iov[0]));
+ iov[0].iov_base = nlreq;
+ iov[0].iov_len = nlreq_len;
-/********************************************************************
- *
- * Functions to read and set the flags value in the device driver
- */
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = &nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = &iov[0];
+ msg.msg_iovlen = 1;
-static void set_ppp_fd (int new_fd)
- {
- SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", ppp_fd));
- ppp_fd = new_fd;
- }
+ if (sendmsg(fd, &msg, 0) < 0) {
+ error("rtnetlink_msg: sendmsg(%s): %m (line %d)", desc, __LINE__);
+ if (!shared_fd)
+ close(fd);
+ return 1;
+ }
-/********************************************************************
- *
- * Functions to read and set the flags value in the device driver
+ memset(iov, 0, sizeof(iov));
+ iov[0].iov_base = &nlresp_hdr;
+ if (nlresp_size && *nlresp_size > sizeof(nlresp_hdr)) {
+ iov[0].iov_len = offsetof(struct nlresp_hdr, nlerr);
+ iov[1].iov_base = nlresp_data;
+ iov[1].iov_len = *nlresp_size;
+ } else {
+ iov[0].iov_len = sizeof(nlresp_hdr);
+ }
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = &nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = iov;
+ msg.msg_iovlen = (nlresp_size && *nlresp_size > sizeof(nlresp_hdr)) ? 2 : 1;
+
+ nlresp_len = recvmsg(fd, &msg, 0);
+
+ if (!shared_fd)
+ close(fd);
+
+ if (nlresp_len < 0) {
+ error("rtnetlink_msg: recvmsg(%s): %m (line %d)", desc, __LINE__);
+ return 1;
+ }
+
+ if (nladdr.nl_family != AF_NETLINK) {
+ error("rtnetlink_msg: recvmsg(%s): Not a netlink packet (line %d)", desc, __LINE__);
+ return 1;
+ }
+
+ if (!nlresp_size) {
+ if ((size_t)nlresp_len < sizeof(nlresp_hdr) || nlresp_hdr.nlh.nlmsg_len < sizeof(nlresp_hdr)) {
+ error("rtnetlink_msg: recvmsg(%s): Acknowledgment netlink packet too short (line %d)", desc, __LINE__);
+ return 1;
+ }
+
+ /* acknowledgment packet for NLM_F_ACK is NLMSG_ERROR */
+ if (nlresp_hdr.nlh.nlmsg_type != NLMSG_ERROR) {
+ error("rtnetlink_msg: recvmsg(%s): Not an acknowledgment netlink packet (line %d)", desc, __LINE__);
+ return 1;
+ }
+ }
+
+ if (nlresp_size) {
+ if (*nlresp_size > sizeof(nlresp_hdr))
+ memcpy((unsigned char *)&nlresp_hdr + offsetof(struct nlresp_hdr, nlerr), nlresp_data, sizeof(nlresp_hdr.nlerr));
+ else
+ memcpy(nlresp_data, (unsigned char *)&nlresp_hdr + offsetof(struct nlresp_hdr, nlerr), *nlresp_size);
+ }
+
+ /* error == 0 indicates success, negative value is errno code */
+ if (nlresp_hdr.nlh.nlmsg_type == NLMSG_ERROR && nlresp_hdr.nlerr.error)
+ return nlresp_hdr.nlerr.error;
+
+ if (nlresp_size) {
+ if (nlresp_hdr.nlh.nlmsg_type != nlresp_type) {
+ error("rtnetlink_msg: recvmsg(%s): Not a netlink packet of type 0x%x (line %d)", desc, nlresp_type, __LINE__);
+ return 1;
+ }
+ *nlresp_size = nlresp_len - offsetof(struct nlresp_hdr, nlerr);
+ }
+
+ return 0;
+}
+
+/*
+ * Determine if the PPP connection should still be present.
*/
-static int get_flags (void)
- {
- int flags;
+extern int hungup;
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0)
- {
- if ( ok_error (errno) )
- {
- flags = 0;
- }
- else
- {
- syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
- quit();
- }
- }
+/* new_fd is the fd of a tty */
+static void set_ppp_fd (int new_fd)
+{
+ ppp_fd = new_fd;
+ if (!new_style_driver)
+ ppp_dev_fd = new_fd;
+}
+
+static int still_ppp(void)
+{
+ if (new_style_driver)
+ return !hungup && ppp_fd >= 0;
+ if (!hungup || ppp_fd == slave_fd)
+ return 1;
+ if (slave_fd >= 0) {
+ set_ppp_fd(slave_fd);
+ return 1;
+ }
+ return 0;
+}
- SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
- return flags;
- }
+/*
+ * modify_flags - set and clear flag bits controlling the kernel
+ * PPP driver.
+ */
+static int modify_flags(int fd, int clear_bits, int set_bits)
+{
+ int flags;
-/********************************************************************/
+ if (ioctl(fd, PPPIOCGFLAGS, &flags) == -1)
+ goto err;
+ flags = (flags & ~clear_bits) | set_bits;
+ if (ioctl(fd, PPPIOCSFLAGS, &flags) == -1)
+ goto err;
-static void set_flags (int flags)
- {
- SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
+ return 0;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
- {
- if (! ok_error (errno) )
- {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS, %x): %m(%d)", flags, errno);
- quit();
- }
- }
- }
+ err:
+ if (errno != EIO)
+ error("Failed to set PPP kernel option flags: %m");
+ return -1;
+}
/********************************************************************
*
*/
void sys_init(void)
- {
- openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
- setlogmask(LOG_UPTO(LOG_INFO));
- if (debug)
- {
- setlogmask(LOG_UPTO(LOG_DEBUG));
- }
-
+{
/* Get an internet socket for doing socket ioctls. */
sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (sock_fd < 0)
- {
- if ( ! ok_error ( errno ))
- {
- syslog(LOG_ERR, "Couldn't create IP socket: %m(%d)", errno);
- die(1);
- }
- }
- }
+ fatal("Couldn't create IP socket: %m(%d)", errno);
+
+#ifdef PPP_WITH_IPV6CP
+ 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;
+}
/********************************************************************
*
* 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(void)
- {
- struct ifreq ifr;
+{
/*
* Take down the device
*/
- if (if_is_up)
- {
+ if (if_is_up) {
+ if_is_up = 0;
sifdown(0);
- }
+ }
+#ifdef PPP_WITH_IPV6CP
+ if (if6_is_up)
+ sif6down(0);
+#endif
+
/*
* Delete any routes through the device.
*/
- if (default_route_gateway != 0)
- {
- cifdefaultroute(0, default_route_gateway);
- }
+ if (have_default_route)
+ cifdefaultroute(0, 0, 0);
+#ifdef PPP_WITH_IPV6CP
+ if (have_default_route6)
+ cif6defaultroute(0, nulleui64, nulleui64);
+#endif
if (has_proxy_arp)
- {
cifproxyarp(0, proxy_arp_addr);
- }
- }
+}
/********************************************************************
*
*/
void
sys_close(void)
- {
- close(sock_fd);
- sock_fd = -1;
- closelog();
- }
-
-/********************************************************************
- *
- * note_debug_level - note a change in the debug level.
- */
-
-void note_debug_level (void)
- {
- if (debug)
- {
- SYSDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug));
- setlogmask(LOG_UPTO(LOG_DEBUG));
- }
- else
- {
- setlogmask(LOG_UPTO(LOG_WARNING));
- }
- }
+{
+ if (new_style_driver && ppp_dev_fd >= 0)
+ close(ppp_dev_fd);
+ if (sock_fd >= 0)
+ close(sock_fd);
+#ifdef PPP_WITH_IPV6CP
+ if (sock6_fd >= 0)
+ close(sock6_fd);
+#endif
+ if (slave_fd >= 0)
+ close(slave_fd);
+ if (master_fd >= 0)
+ close(master_fd);
+}
/********************************************************************
*
* set_kdebugflag - Define the debugging level for the kernel
*/
-int set_kdebugflag (int requested_level)
- {
- if (ioctl(ppp_fd, PPPIOCSDEBUG, &requested_level) < 0)
- {
+static int set_kdebugflag (int requested_level)
+{
+ if (ppp_dev_fd < 0)
+ return 1;
+ if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) {
if ( ! ok_error (errno) )
- {
- syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
- }
+ error("ioctl(PPPIOCSDEBUG): %m (line %d)", __LINE__);
return (0);
- }
- SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
- requested_level));
+ }
return (1);
- }
+}
/********************************************************************
*
- * establish_ppp - Turn the serial port into a ppp interface.
+ * tty_establish_ppp - Turn the serial port into a ppp interface.
*/
-void establish_ppp (int tty_fd)
- {
- int x;
-/*
- * The current PPP device will be the tty file.
- */
- set_ppp_fd (tty_fd);
+int tty_establish_ppp (int tty_fd)
+{
+ int ret_fd;
+
/*
* Ensure that the tty device is in exclusive mode.
*/
- if (ioctl(tty_fd, TIOCEXCL, 0) < 0)
- {
+ if (ioctl(tty_fd, TIOCEXCL, 0) < 0) {
if ( ! ok_error ( errno ))
- {
- syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
- }
- }
+ warn("Couldn't make tty exclusive: %m");
+ }
/*
* Demand mode - prime the old ppp device to relinquish the unit.
*/
- if (demand && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0)
- {
- if ( ! ok_error ( errno ))
- {
- syslog(LOG_ERR, "ioctl(transfer ppp unit): %m(%d)", errno);
- die(1);
- }
- }
+ if (!new_style_driver && looped
+ && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0) {
+ error("ioctl(transfer ppp unit): %m, line %d", __LINE__);
+ return -1;
+ }
/*
* Set the current tty to the PPP discpline
*/
- if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
- {
- if ( ! ok_error (errno) )
- {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
- die(1);
- }
- }
-/*
- * Find out which interface we were given.
- */
- if (ioctl(ppp_fd, PPPIOCGUNIT, &x) < 0)
- {
- if ( ! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
- die(1);
- }
- }
-/*
- * Check that we got the same unit again.
- */
- if (demand)
- {
- if (x != ifunit)
- {
- syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
- ifunit, x);
- die(1);
- }
- ioctl(slave_fd, TIOCSETD, &tty_disc);
- }
- ifunit = x;
-/*
- * Enable debug in the driver if requested.
- */
- set_kdebugflag (kdebugflag);
+#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;
+ }
+ }
- set_flags (get_flags() & ~(SC_RCV_B7_0 | SC_RCV_B7_1 |
- SC_RCV_EVNP | SC_RCV_ODDP));
+ ret_fd = generic_establish_ppp(tty_fd);
- 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.
+#define SC_RCVB (SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP)
+#define SC_LOGB (SC_DEBUG | SC_LOG_INPKT | SC_LOG_OUTPKT | SC_LOG_RAWIN \
+ | SC_LOG_FLUSH)
+
+ if (ret_fd >= 0) {
+ modify_flags(ppp_fd, SC_RCVB | SC_LOGB,
+ (kdebugflag * SC_DEBUG) & SC_LOGB);
+ } else {
+ if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0 && !ok_error(errno))
+ warn("Couldn't reset tty to normal line discipline: %m");
+ }
+
+ return ret_fd;
+}
+
+/********************************************************************
+ *
+ * generic_establish_ppp - Turn the fd into a ppp interface.
*/
- initfdflags = fcntl(ppp_fd, F_GETFL);
+int generic_establish_ppp (int fd)
+{
+ int x;
- if (initfdflags == -1 ||
- fcntl(ppp_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1)
- {
- if ( ! ok_error (errno))
- {
- syslog(LOG_WARNING,
- "Couldn't set device to non-blocking mode: %m");
- }
- }
- }
+ if (new_style_driver) {
+ int flags;
+
+ /* If a ppp_fd is already open, close it first */
+ if (ppp_fd >= 0) {
+ close(ppp_fd);
+ remove_fd(ppp_fd);
+ ppp_fd = -1;
+ }
+
+ /* Open an instance of /dev/ppp and connect the channel to it */
+ if (ioctl(fd, PPPIOCGCHAN, &chindex) == -1) {
+ error("Couldn't get channel number: %m");
+ goto err;
+ }
+ dbglog("using channel %d", chindex);
+ fd = open("/dev/ppp", O_RDWR);
+ if (fd < 0) {
+ error("Couldn't reopen /dev/ppp: %m");
+ goto err;
+ }
+ (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
+ if (ioctl(fd, PPPIOCATTCHAN, &chindex) < 0) {
+ error("Couldn't attach to channel %d: %m", chindex);
+ goto err_close;
+ }
+ flags = fcntl(fd, F_GETFL);
+ if (flags == -1 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("Couldn't set /dev/ppp (channel) to nonblock: %m");
+ set_ppp_fd(fd);
+
+ if (!looped)
+ ifunit = -1;
+ if (!looped && !multilink) {
+ /*
+ * Create a new PPP unit.
+ */
+ if (make_ppp_unit() < 0)
+ goto err_close;
+ }
+
+ if (looped)
+ modify_flags(ppp_dev_fd, SC_LOOP_TRAFFIC, 0);
+
+ if (!multilink) {
+ add_fd(ppp_dev_fd);
+ if (ioctl(fd, PPPIOCCONNECT, &ifunit) < 0) {
+ error("Couldn't attach to PPP unit %d: %m", ifunit);
+ goto err_close;
+ }
+ }
+
+ } else {
+ /*
+ * Old-style driver: find out which interface we were given.
+ */
+ set_ppp_fd (fd);
+ if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
+ if (ok_error (errno))
+ goto err;
+ fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__);
+ }
+ /* Check that we got the same unit again. */
+ if (looped && x != ifunit)
+ fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
+ ifunit = x;
+
+ /*
+ * Fetch the initial file flags and reset blocking mode on the file.
+ */
+ initfdflags = fcntl(fd, F_GETFL);
+ if (initfdflags == -1 ||
+ fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
+ if ( ! ok_error (errno))
+ warn("Couldn't set device to non-blocking mode: %m");
+ }
+ }
+
+ /*
+ * Enable debug in the driver if requested.
+ */
+ if (!looped)
+ set_kdebugflag (kdebugflag);
+
+ looped = 0;
+
+ return ppp_fd;
+
+ err_close:
+ close(fd);
+ err:
+ return -1;
+}
/********************************************************************
*
- * disestablish_ppp - Restore the serial port to normal operation.
+ * tty_disestablish_ppp - Restore the serial port to normal operation.
* This shouldn't call die() because it's called from die().
*/
-void disestablish_ppp(int tty_fd)
- {
- int x;
- char *s;
-/*
- * Do nothing if the PPP device is controlled by the loopback device
- */
- if (tty_fd != ppp_fd)
- {
- return;
- }
+void tty_disestablish_ppp(int tty_fd)
+{
+ if (!hungup) {
/*
- * Attempt to restore the previous tty settings
+ * Flush the tty output buffer so that the TIOCSETD doesn't hang.
*/
- if (still_ppp())
- {
- set_kdebugflag (0);
+ if (tcflush(tty_fd, TCIOFLUSH) < 0)
+ {
+ warn("tcflush failed: %m");
+ goto flushfailed;
+ }
/*
* Restore the previous line discipline
*/
- if (ioctl(ppp_fd, TIOCSETD, &tty_disc) < 0)
- {
+ if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) {
if ( ! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(TIOCSETD, N_TTY): %m");
- }
- }
-
- if (ioctl(ppp_fd, TIOCNXCL, 0) < 0)
- {
+ error("ioctl(TIOCSETD, N_TTY): %m (line %d)", __LINE__);
+ }
+
+ if (ioctl(tty_fd, TIOCNXCL, 0) < 0) {
if ( ! ok_error (errno))
- {
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m(%d)", errno);
- }
- }
+ warn("ioctl(TIOCNXCL): %m (line %d)", __LINE__);
+ }
/* Reset non-blocking mode on fd. */
- if (initfdflags != -1 && fcntl(ppp_fd, F_SETFL, initfdflags) < 0)
- {
+ if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0) {
if ( ! ok_error (errno))
- {
- syslog (LOG_WARNING,
- "Couldn't restore device fd flags: %m");
- }
- }
- }
+ warn("Couldn't restore device fd flags: %m");
+ }
+ }
+flushfailed:
initfdflags = -1;
- }
+
+ generic_disestablish_ppp(tty_fd);
+}
+
+/********************************************************************
+ *
+ * generic_disestablish_ppp - Restore device components to normal
+ * operation, and reconnect the ppp unit to the loopback if in demand
+ * mode. This shouldn't call die() because it's called from die().
+ */
+void generic_disestablish_ppp(int dev_fd)
+{
+ if (new_style_driver) {
+ close(ppp_fd);
+ ppp_fd = -1;
+ if (demand) {
+ modify_flags(ppp_dev_fd, 0, SC_LOOP_TRAFFIC);
+ looped = 1;
+ } else if (!doing_multilink && ppp_dev_fd >= 0) {
+ close(ppp_dev_fd);
+ remove_fd(ppp_dev_fd);
+ ppp_dev_fd = -1;
+ }
+ } else {
+ /* old-style driver */
+ if (demand)
+ set_ppp_fd(slave_fd);
+ else
+ ppp_dev_fd = -1;
+ }
+}
+
+/*
+ * make_ppp_unit_rtnetlink - register a new ppp network interface for ppp_dev_fd
+ * with specified req_ifname via rtnetlink. Interface name req_ifname must not
+ * be empty. Custom ppp unit id req_unit is ignored and kernel choose some free.
+ */
+static int make_ppp_unit_rtnetlink(void)
+{
+ struct {
+ struct nlmsghdr nlh;
+ struct ifinfomsg ifm;
+ struct {
+ struct rtattr rta;
+ char ifname[IFNAMSIZ];
+ } ifn;
+ struct {
+ struct rtattr rta;
+ struct {
+ struct rtattr rta;
+ char ifkind[sizeof("ppp")];
+ } ifik;
+ struct {
+ struct rtattr rta;
+ struct {
+ struct rtattr rta;
+ union {
+ int ppp_dev_fd;
+ } ppp;
+ } ifdata[1];
+ } ifid;
+ } ifli;
+ } nlreq;
+ int resp;
+
+ memset(&nlreq, 0, sizeof(nlreq));
+ nlreq.nlh.nlmsg_len = sizeof(nlreq);
+ nlreq.nlh.nlmsg_type = RTM_NEWLINK;
+ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE;
+ nlreq.ifm.ifi_family = AF_UNSPEC;
+ nlreq.ifm.ifi_type = ARPHRD_NETROM;
+ nlreq.ifn.rta.rta_len = sizeof(nlreq.ifn);
+ nlreq.ifn.rta.rta_type = IFLA_IFNAME;
+ strlcpy(nlreq.ifn.ifname, req_ifname, sizeof(nlreq.ifn.ifname));
+ nlreq.ifli.rta.rta_len = sizeof(nlreq.ifli);
+ nlreq.ifli.rta.rta_type = IFLA_LINKINFO;
+ nlreq.ifli.ifik.rta.rta_len = sizeof(nlreq.ifli.ifik);
+ nlreq.ifli.ifik.rta.rta_type = IFLA_INFO_KIND;
+ strcpy(nlreq.ifli.ifik.ifkind, "ppp");
+ nlreq.ifli.ifid.rta.rta_len = sizeof(nlreq.ifli.ifid);
+ nlreq.ifli.ifid.rta.rta_type = IFLA_INFO_DATA;
+ nlreq.ifli.ifid.ifdata[0].rta.rta_len = sizeof(nlreq.ifli.ifid.ifdata[0]);
+ nlreq.ifli.ifid.ifdata[0].rta.rta_type = IFLA_PPP_DEV_FD;
+ nlreq.ifli.ifid.ifdata[0].ppp.ppp_dev_fd = ppp_dev_fd;
+
+ /*
+ * See kernel function ppp_nl_newlink(), which may return -EBUSY to prevent
+ * possible deadlock in kernel and ask userspace to retry request again.
+ */
+ do {
+ resp = rtnetlink_msg("RTM_NEWLINK/NLM_F_CREATE", NULL, &nlreq, sizeof(nlreq), NULL, NULL, 0);
+ } while (resp == -EBUSY);
+
+ if (resp) {
+ /*
+ * Linux kernel versions prior to 4.7 do not support creating ppp
+ * interfaces via rtnetlink API and therefore error response is
+ * expected. On older kernel versions do not show this error message.
+ * When error is different than EEXIST then pppd tries to fallback to
+ * the old ioctl method.
+ */
+ errno = (resp < 0) ? -resp : EINVAL;
+ if (kernel_version >= KVERSION(4,7,0))
+ error("Couldn't create ppp interface %s: %m", req_ifname);
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * make_ppp_unit - make a new ppp unit for ppp_dev_fd.
+ * Assumes new_style_driver.
+ */
+static int make_ppp_unit(void)
+{
+ int x, flags;
+
+ if (ppp_dev_fd >= 0) {
+ dbglog("in make_ppp_unit, already had /dev/ppp open?");
+ close(ppp_dev_fd);
+ }
+ ppp_dev_fd = open("/dev/ppp", O_RDWR);
+ if (ppp_dev_fd < 0)
+ fatal("Couldn't open /dev/ppp: %m");
+ flags = fcntl(ppp_dev_fd, F_GETFL);
+ if (flags == -1
+ || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("Couldn't set /dev/ppp to nonblock: %m");
+
+ /*
+ * Via rtnetlink it is possible to create ppp network interface with
+ * custom ifname atomically. But it is not possible to specify custom
+ * ppp unit id.
+ *
+ * Tools like systemd, udev or NetworkManager are trying to query
+ * interface attributes based on interface name immediately when new
+ * network interface is created. And therefore immediate interface
+ * renaming is causing issues.
+ *
+ * So use rtnetlink API only when user requested custom ifname. It will
+ * avoid system issues with interface renaming.
+ */
+ if (req_unit == -1 && req_ifname[0] != '\0' && kernel_version >= KVERSION(2,1,16)) {
+ if (make_ppp_unit_rtnetlink()) {
+ if (ioctl(ppp_dev_fd, PPPIOCGUNIT, &ifunit))
+ fatal("Couldn't retrieve PPP unit id: %m");
+ return 0;
+ }
+ /*
+ * If interface with requested name already exist return error
+ * otherwise fallback to old ioctl method.
+ */
+ if (errno == EEXIST)
+ return -1;
+ }
+
+ ifunit = req_unit;
+ x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+ if (x < 0 && req_unit >= 0 && errno == EEXIST) {
+ warn("Couldn't allocate PPP unit %d as it is already in use", req_unit);
+ ifunit = -1;
+ x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+ }
+ if (x < 0 && errno == EEXIST) {
+ srand(time(NULL) * getpid());
+ ifunit = rand() % 10000;
+ x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+ }
+ if (x < 0)
+ error("Couldn't create new ppp unit: %m");
+
+ if (x == 0 && req_ifname[0] != '\0') {
+ struct ifreq ifr;
+ char t[IFNAMSIZ];
+ memset(&ifr, 0, sizeof(struct ifreq));
+ slprintf(t, sizeof(t), "%s%d", PPP_DRV_NAME, ifunit);
+ strlcpy(ifr.ifr_name, t, IFNAMSIZ);
+ strlcpy(ifr.ifr_newname, req_ifname, IFNAMSIZ);
+ x = ioctl(sock_fd, SIOCSIFNAME, &ifr);
+ if (x < 0)
+ error("Couldn't rename interface %s to %s: %m", t, req_ifname);
+ else
+ info("Renamed interface %s to %s", t, req_ifname);
+ }
+
+ return x;
+}
+
+/*
+ * cfg_bundle - configure the existing bundle.
+ * Used in demand mode.
+ */
+void cfg_bundle(int mrru, int mtru, int rssn, int tssn)
+{
+ if (!new_style_driver)
+ return;
+
+ /* set the mrru, mtu and flags */
+ if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0)
+ error("Couldn't set MRRU: %m");
+
+ modify_flags(ppp_dev_fd, SC_MP_SHORTSEQ|SC_MP_XSHORTSEQ|SC_MULTILINK,
+ ((rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0)
+ | (mrru? SC_MULTILINK: 0)));
+
+ /* connect up the channel */
+ if (ioctl(ppp_fd, PPPIOCCONNECT, &ifunit) < 0)
+ fatal("Couldn't attach to PPP unit %d: %m", ifunit);
+ add_fd(ppp_dev_fd);
+}
+
+/*
+ * make_new_bundle - create a new PPP unit (i.e. a bundle)
+ * and connect our channel to it. This should only get called
+ * if `multilink' was set at the time establish_ppp was called.
+ * In demand mode this uses our existing bundle instead of making
+ * a new one.
+ */
+void make_new_bundle(int mrru, int mtru, int rssn, int tssn)
+{
+ if (!new_style_driver)
+ return;
+
+ /* make us a ppp unit */
+ if (make_ppp_unit() < 0)
+ die(1);
+
+ /* set the mrru and flags */
+ cfg_bundle(mrru, mtru, rssn, tssn);
+}
+
+/*
+ * bundle_attach - attach our link to a given PPP unit.
+ * We assume the unit is controlled by another pppd.
+ */
+int bundle_attach(int ifnum)
+{
+ int master_fd;
+
+ if (!new_style_driver)
+ return -1;
+
+ master_fd = open("/dev/ppp", O_RDWR);
+ if (master_fd < 0)
+ fatal("Couldn't open /dev/ppp: %m");
+ if (ioctl(master_fd, PPPIOCATTACH, &ifnum) < 0) {
+ if (errno == ENXIO) {
+ close(master_fd);
+ return 0; /* doesn't still exist */
+ }
+ fatal("Couldn't attach to interface unit %d: %m\n", ifnum);
+ }
+ if (ioctl(ppp_fd, PPPIOCCONNECT, &ifnum) < 0)
+ fatal("Couldn't connect to interface unit %d: %m", ifnum);
+ modify_flags(master_fd, 0, SC_MULTILINK);
+ close(master_fd);
+
+ ifunit = ifnum;
+ return 1;
+}
+
+/*
+ * destroy_bundle - tell the driver to destroy our bundle.
+ */
+void destroy_bundle(void)
+{
+ if (ppp_dev_fd >= 0) {
+ close(ppp_dev_fd);
+ remove_fd(ppp_dev_fd);
+ ppp_dev_fd = -1;
+ }
+}
/********************************************************************
*
* appropriate error messages.
*/
void clean_check(void)
- {
+{
int x;
char *s;
- if (still_ppp())
- {
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0)
- {
+ if (still_ppp()) {
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
s = NULL;
- switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP))
- {
- case SC_RCV_B7_0 | 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:
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:
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);
+ }
+ }
+ }
+}
+
/*
* List of valid speeds.
#ifdef B57600
{ 57600, B57600 },
#endif
+#ifdef B76800
+ { 76800, B76800 },
+#endif
#ifdef B115200
{ 115200, B115200 },
#endif
+#ifdef B153600
+ { 153600, B153600 },
+#endif
#ifdef EXTA
{ 19200, EXTA },
#endif
#ifdef EXTB
{ 38400, EXTB },
#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 == speedp->speed_int)
- {
+#ifdef B230400
+ { 230400, B230400 },
+#endif
+#ifdef B307200
+ { 307200, B307200 },
+#endif
+#ifdef B460800
+ { 460800, B460800 },
+#endif
+#ifdef B500000
+ { 500000, B500000 },
+#endif
+#ifdef B576000
+ { 576000, B576000 },
+#endif
+#ifdef B614400
+ { 614400, B614400 },
+#endif
+#ifdef B921600
+ { 921600, B921600 },
+#endif
+#ifdef B1000000
+ { 1000000, B1000000 },
+#endif
+#ifdef B1152000
+ { 1152000, B1152000 },
+#endif
+#ifdef B1500000
+ { 1500000, B1500000 },
+#endif
+#ifdef B2000000
+ { 2000000, B2000000 },
+#endif
+#ifdef B2500000
+ { 2500000, B2500000 },
+#endif
+#ifdef B3000000
+ { 3000000, B3000000 },
+#endif
+#ifdef B3500000
+ { 3500000, B3500000 },
+#endif
+#ifdef B4000000
+ { 4000000, B4000000 },
+#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 == speedp->speed_int)
return speedp->speed_val;
- }
- }
- syslog(LOG_WARNING, "speed %d not supported", bps);
- }
+ }
+ }
return 0;
- }
+}
/********************************************************************
*
*/
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;
- }
+}
/********************************************************************
*
* regardless of whether the modem option was specified.
*/
-void set_up_tty (int tty_fd, int local)
- {
- int speed, x;
+void set_up_tty(int tty_fd, int local)
+{
+ int speed;
struct termios tios;
-
- if (tcgetattr(tty_fd, &tios) < 0)
- {
- syslog(LOG_ERR, "tcgetattr: %m(%d)", errno);
- die(1);
- }
-
+
+ setdtr(tty_fd, 1);
+ if (tcgetattr(tty_fd, &tios) < 0) {
+ if (!ok_error(errno))
+ fatal("tcgetattr: %m (line %d)", __LINE__);
+ return;
+ }
+
if (!restore_term)
- {
inittermios = tios;
- }
-
+
tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
tios.c_cflag |= CS8 | CREAD | HUPCL;
tios.c_lflag = 0;
tios.c_cc[VMIN] = 1;
tios.c_cc[VTIME] = 0;
-
+
if (local || !modem)
- {
tios.c_cflag ^= (CLOCAL | HUPCL);
- }
- switch (crtscts)
- {
+ switch (crtscts) {
case 1:
tios.c_cflag |= CRTSCTS;
break;
default:
break;
- }
-
- speed = translate_speed(inspeed);
- if (speed)
- {
- cfsetospeed (&tios, speed);
- cfsetispeed (&tios, speed);
- }
+ }
+
+ if (stop_bits >= 2)
+ tios.c_cflag |= CSTOPB;
+
+ if (inspeed) {
+ speed = translate_speed(inspeed);
+ if (speed) {
+ cfsetospeed (&tios, speed);
+ cfsetispeed (&tios, speed);
+ speed = cfgetospeed(&tios);
+ baud_rate = baud_rate_of(speed);
+ } else {
+#ifdef BOTHER
+ tios.c_cflag &= ~CBAUD;
+ tios.c_cflag |= BOTHER;
+ tios.c_ospeed = inspeed;
+#ifdef IBSHIFT
+ /* B0 sets input baudrate to the output baudrate */
+ tios.c_cflag &= ~(CBAUD << IBSHIFT);
+ tios.c_cflag |= B0 << IBSHIFT;
+ tios.c_ispeed = inspeed;
+#endif
+ baud_rate = inspeed;
+#else
+ baud_rate = 0;
+#endif
+ }
+ }
+ else {
+ speed = cfgetospeed(&tios);
+ baud_rate = baud_rate_of(speed);
+#ifdef BOTHER
+ if (!baud_rate)
+ baud_rate = tios.c_ospeed;
+#endif
+ }
+
/*
- * We can't proceed if the serial port speed is B0,
+ * We can't proceed if the serial port baud rate is unknown,
* since that implies that the serial port is disabled.
*/
- 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(tty_fd, TCSAFLUSH, &tios) < 0)
- {
- syslog(LOG_ERR, "tcsetattr: %m");
- die(1);
- }
-
- baud_rate = baud_rate_of(speed);
- restore_term = TRUE;
- }
+ if (!baud_rate) {
+ if (inspeed)
+ fatal("speed %d not supported", inspeed);
+ else
+ fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
+ }
+
+ while (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0 && !ok_error(errno))
+ if (errno != EINTR)
+ fatal("tcsetattr: %m (line %d)", __LINE__);
+ restore_term = 1;
+}
/********************************************************************
*
*/
void setdtr (int tty_fd, int on)
- {
+{
int modembits = TIOCM_DTR;
ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
- }
+}
/********************************************************************
*
*/
void restore_tty (int tty_fd)
- {
- if (restore_term)
- {
+{
+ if (restore_term) {
restore_term = 0;
/*
* Turn off echoing, because otherwise we can get into
* 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 (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) {
if (! ok_error (errno))
- {
- syslog(LOG_WARNING, "tcsetattr: %m");
- }
- }
- }
- }
+ warn("tcsetattr: %m (line %d)", __LINE__);
+ }
+ }
+}
/********************************************************************
*
*/
void output (int unit, unsigned char *p, int len)
- {
- if (debug)
- {
- log_packet(p, len, "sent ");
- }
-
- if (write(ppp_fd, p, len) < 0)
- {
- if (errno == EWOULDBLOCK || errno == ENOBUFS
- || errno == ENXIO || errno == EIO)
- {
- syslog(LOG_WARNING, "write: warning: %m(%d)", errno);
- }
+{
+ int fd = ppp_fd;
+ int proto;
+
+ dump_packet("sent", p, len);
+ if (snoop_send_hook) snoop_send_hook(p, len);
+
+ if (len < PPP_HDRLEN)
+ return;
+ if (new_style_driver) {
+ p += 2;
+ len -= 2;
+ proto = (p[0] << 8) + p[1];
+ if (ppp_dev_fd >= 0 && !(proto >= 0xc000 || proto == PPP_CCPFRAG))
+ fd = ppp_dev_fd;
+ }
+ if (write(fd, p, len) < 0) {
+ if (errno == EWOULDBLOCK || errno == EAGAIN || errno == ENOBUFS
+ || errno == ENXIO || errno == EIO || errno == EINTR)
+ warn("write: warning: %m (%d)", errno);
else
- {
- syslog(LOG_ERR, "write: %m(%d)", errno);
- die(1);
- }
- }
- }
+ error("write: %m (%d)", errno);
+ }
+}
/********************************************************************
*
- * wait_input - wait until there is data available on ppp_fd,
+ * wait_input - wait until there is data available,
* for the length of time specified by *timo (indefinite
* if timo is NULL).
*/
-void wait_input (struct timeval *timo)
- {
- fd_set ready;
+void wait_input(struct timeval *timo)
+{
+ fd_set ready, exc;
int n;
-
- FD_ZERO(&ready);
- FD_SET(ppp_fd, &ready);
- n = select(ppp_fd + 1, &ready, NULL, &ready, timo);
+ ready = in_fds;
+ exc = in_fds;
+ n = select(max_in_fd + 1, &ready, NULL, &exc, timo);
if (n < 0 && errno != EINTR)
- {
- syslog(LOG_ERR, "select: %m(%d)", errno);
- die(1);
- }
- }
+ fatal("select: %m");
+}
-/********************************************************************
- *
- * 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).
+/*
+ * add_fd - add an fd to the set that wait_input waits for.
*/
-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)
- {
- syslog(LOG_ERR, "select: %m(%d)", errno);
- die(1);
- }
- }
+void add_fd(int fd)
+{
+ if (fd >= FD_SETSIZE)
+ fatal("internal error: file descriptor too large (%d)", fd);
+ FD_SET(fd, &in_fds);
+ if (fd > max_in_fd)
+ max_in_fd = fd;
+}
-/********************************************************************
- *
- * wait_time - wait for a given length of time or until a
- * signal is received.
+/*
+ * remove_fd - remove an fd from the set that wait_input waits for.
*/
-
-void wait_time(timo)
- struct timeval *timo;
+void remove_fd(int fd)
{
- int n;
-
- n = select(0, NULL, NULL, NULL, timo);
- if (n < 0 && errno != EINTR) {
- syslog(LOG_ERR, "select: %m(%d)", errno);
- die(1);
- }
+ FD_CLR(fd, &in_fds);
}
+
/********************************************************************
*
* read_packet - get a PPP packet from the serial device.
*/
int read_packet (unsigned char *buf)
- {
- int len;
-
- len = read(ppp_fd, buf, PPP_MTU + PPP_HDRLEN);
- if (len < 0)
- {
- if (errno == EWOULDBLOCK)
- {
- return -1;
- }
- syslog(LOG_ERR, "read: %m(%d)", errno);
- die(1);
- }
- return len;
- }
+{
+ int len, nr;
+
+ len = PPP_MRU + PPP_HDRLEN;
+ if (new_style_driver) {
+ *buf++ = PPP_ALLSTATIONS;
+ *buf++ = PPP_UI;
+ len -= 2;
+ }
+ nr = -1;
+ if (ppp_fd >= 0) {
+ nr = read(ppp_fd, buf, len);
+ if (nr < 0 && errno != EWOULDBLOCK && errno != EAGAIN
+ && errno != EIO && errno != EINTR)
+ error("read: %m");
+ if (nr < 0 && errno == ENXIO)
+ return 0;
+ }
+ if (nr < 0 && new_style_driver && ppp_dev_fd >= 0 && !bundle_eof) {
+ /* N.B. we read ppp_fd first since LCP packets come in there. */
+ nr = read(ppp_dev_fd, buf, len);
+ if (nr < 0 && errno != EWOULDBLOCK && errno != EAGAIN
+ && errno != EIO && errno != EINTR)
+ error("read /dev/ppp: %m");
+ if (nr < 0 && errno == ENXIO)
+ nr = 0;
+ if (nr == 0 && doing_multilink) {
+ remove_fd(ppp_dev_fd);
+ bundle_eof = 1;
+ }
+ }
+ if (new_style_driver && ppp_fd < 0 && ppp_dev_fd < 0)
+ nr = 0;
+ return (new_style_driver && nr > 0)? nr+2: nr;
+}
/********************************************************************
*
*/
int
get_loop_output(void)
- {
+{
int rv = 0;
- int n = read(master_fd, inbuf, sizeof(inbuf));
+ 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 > 0)
- {
+ while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0)
if (loop_chars(inbuf, n))
- {
rv = 1;
- }
- n = read(master_fd, inbuf, sizeof(inbuf));
- }
if (n == 0)
- {
- syslog(LOG_ERR, "eof on loopback");
- die(1);
- }
-
- if (errno != EWOULDBLOCK)
- {
- syslog(LOG_ERR, "read from loopback: %m(%d)", errno);
- die(1);
- }
-
+ fatal("eof on loopback");
+
+ if (errno != EWOULDBLOCK && errno != EAGAIN)
+ 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;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+
+ if (ifunit >= 0 && ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
+ error("ioctl(SIOCSIFMTU): %m (line %d)", __LINE__);
+}
+
+/*
+ * netif_get_mtu - get the MTU on the PPP network interface.
+ */
+int
+netif_get_mtu(int unit)
+{
+ struct ifreq ifr;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+
+ if (ifunit >= 0 && ioctl(sock_fd, SIOCGIFMTU, (caddr_t) &ifr) < 0) {
+ error("ioctl(SIOCGIFMTU): %m (line %d)", __LINE__);
+ return 0;
+ }
+ return ifr.ifr_mtu;
+}
/********************************************************************
*
- * ppp_send_config - configure the transmit characteristics of
+ * tty_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;
-
- SYSDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
-/*
- * Ensure that the link is still up.
+void tty_send_config(int mtu, u_int32_t asyncmap, int pcomp, int accomp)
+{
+ int x;
+
+ if (!still_ppp())
+ return;
+ link_mtu = mtu;
+ if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (errno != EIO && errno != ENOTTY)
+ error("Couldn't set transmit async character map: %m");
+ ++error_count;
+ return;
+ }
+
+ x = (pcomp? SC_COMP_PROT: 0) | (accomp? SC_COMP_AC: 0)
+ | (sync_serial? SC_SYNC: 0);
+ modify_flags(ppp_fd, SC_COMP_PROT|SC_COMP_AC|SC_SYNC, x);
+}
+
+/********************************************************************
+ *
+ * tty_set_xaccm - set the extended transmit ACCM for the interface.
*/
- if (still_ppp())
- {
-/*
- * 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;
-
- if (ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
- {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m(%d)", errno);
- quit();
- }
-
- SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
- {
- syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m(%d)", errno);
- quit();
- }
-
- 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);
- }
- }
-
-/********************************************************************
- *
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
- */
-
-void ppp_set_xaccm (int unit, ext_accm accm)
- {
- SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
- accm[0], accm[1], accm[2], accm[3]));
-
- if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
- {
+
+void tty_set_xaccm (ext_accm accm)
+{
+ if (!still_ppp())
+ return;
+ if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) {
if ( ! ok_error (errno))
- {
- syslog(LOG_WARNING, "ioctl(set extended ACCM): %m(%d)", errno);
- }
- }
- }
+ warn("ioctl(set extended ACCM): %m (line %d)", __LINE__);
+ }
+}
/********************************************************************
*
- * ppp_recv_config - configure the receive-side characteristics of
+ * tty_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;
-
- SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
+void tty_recv_config(int mru, u_int32_t asyncmap, int pcomp, int accomp)
+{
/*
* 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;
- }
+ if (!still_ppp())
+ return;
/*
* Set the receiver parameters
*/
- if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
- {
- if ( ! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m(%d)", errno);
- }
- }
-
- SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
- {
- syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno);
- quit();
- }
-
- x = get_flags();
- x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
- set_flags (x);
- }
+ if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+ if (errno != EIO && errno != ENOTTY)
+ error("Couldn't set channel receive MRU: %m");
+ }
+ if (new_style_driver && ppp_dev_fd >= 0
+ && ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
+ error("Couldn't set MRU in generic PPP layer: %m");
+
+ if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (errno != EIO && errno != ENOTTY)
+ error("Couldn't set channel receive asyncmap: %m");
+ }
+}
/********************************************************************
*
* is acceptable for use.
*/
-int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
- {
+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.length = opt_len;
data.transmit = for_transmit;
- if (ioctl(ppp_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
- {
+ if (ioctl(ppp_dev_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
return 1;
- }
return (errno == ENOBUFS)? 0: -1;
- }
+}
/********************************************************************
*
*/
void ccp_flags_set (int unit, int isopen, int isup)
- {
- 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);
- }
- }
+{
+ int x;
+
+ x = (isopen? SC_CCP_OPEN: 0) | (isup? SC_CCP_UP: 0);
+ if (still_ppp() && ppp_dev_fd >= 0)
+ modify_flags(ppp_dev_fd, SC_CCP_OPEN|SC_CCP_UP, x);
+}
+
+#ifdef PPP_WITH_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_WITH_FILTER */
/********************************************************************
*
* get_idle_time - return how long the link has been idle.
*/
int
-get_idle_time(u, ip)
- int u;
- struct ppp_idle *ip;
+get_idle_time(int u, struct ppp_idle *ip)
{
- return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
-}
+ return ioctl(ppp_dev_fd, PPPIOCGIDLE, ip) >= 0;
+}
/********************************************************************
*
- * 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.
+ * get_ppp_stats_iocl - return statistics for the link, using the ioctl() method,
+ * this only supports 32-bit counters, so need to count the wraps.
*/
+static int
+get_ppp_stats_ioctl(int u, struct pppd_stats *stats)
+{
+ static u_int32_t previbytes = 0;
+ static u_int32_t prevobytes = 0;
+ static u_int32_t iwraps = 0;
+ static u_int32_t owraps = 0;
-int ccp_fatal_error (int unit)
- {
- int x = get_flags();
+ struct ifreq req;
+ struct ppp_stats data;
- return x & SC_DC_FERROR;
- }
+ memset (&req, 0, sizeof (req));
-/*
- * path_to_route - determine the path to the proc file system data
- */
+ req.ifr_data = (caddr_t) &data;
+ 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 = data.p.ppp_ibytes;
+ stats->bytes_out = data.p.ppp_obytes;
+ stats->pkts_in = data.p.ppp_ipackets;
+ stats->pkts_out = data.p.ppp_opackets;
-FILE *route_fd = (FILE *) 0;
-static char route_buffer [512];
+ if (stats->bytes_in < previbytes)
+ ++iwraps;
+ if (stats->bytes_out < prevobytes)
+ ++owraps;
-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);
+ previbytes = stats->bytes_in;
+ prevobytes = stats->bytes_out;
+
+ stats->bytes_in += (uint64_t)iwraps << 32;
+ stats->bytes_out += (uint64_t)owraps << 32;
+
+ return 1;
+}
/********************************************************************
- *
- * path_to_procfs - find the path to the proc file system mount point
+ * get_ppp_stats_rtnetlink - return statistics for the link, using rtnetlink
+ * This provides native 64-bit counters.
*/
+static int
+get_ppp_stats_rtnetlink(int u, struct pppd_stats *stats)
+{
+ static int fd = -1;
+
+ struct {
+ struct nlmsghdr nlh;
+ struct if_stats_msg ifsm;
+ } nlreq;
+ struct {
+ struct rtmsg rth;
+ struct {
+ /* We only case about these first fields from rtnl_link_stats64 */
+ uint64_t rx_packets;
+ uint64_t tx_packets;
+ uint64_t rx_bytes;
+ uint64_t tx_bytes;
+ } stats;
+ } nlresp_data;
+ size_t nlresp_size;
+ int resp;
+
+ memset(&nlreq, 0, sizeof(nlreq));
+ nlreq.nlh.nlmsg_len = sizeof(nlreq);
+ nlreq.nlh.nlmsg_type = RTM_GETSTATS;
+ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST;
+ nlreq.ifsm.ifindex = if_nametoindex(ifname);
+ nlreq.ifsm.filter_mask = IFLA_STATS_LINK_64;
+
+ nlresp_size = sizeof(nlresp_data);
+ resp = rtnetlink_msg("RTM_GETSTATS/NLM_F_REQUEST", &fd, &nlreq, sizeof(nlreq), &nlresp_data, &nlresp_size, RTM_NEWSTATS);
+ if (resp) {
+ errno = (resp < 0) ? -resp : EINVAL;
+ if (kernel_version >= KVERSION(4,7,0))
+ error("get_ppp_stats_rtnetlink: %m (line %d)", __LINE__);
+ goto err;
+ }
-static int path_to_procfs (void)
- {
- struct mntent *mntent;
- FILE *fp;
+ if (nlresp_size < sizeof(nlresp_data)) {
+ error("get_ppp_stats_rtnetlink: Obtained an insufficiently sized rtnl_link_stats64 struct from the kernel (line %d).", __LINE__);
+ goto err;
+ }
+
+ stats->bytes_in = nlresp_data.stats.rx_bytes;
+ stats->bytes_out = nlresp_data.stats.tx_bytes;
+ stats->pkts_in = nlresp_data.stats.rx_packets;
+ stats->pkts_out = nlresp_data.stats.tx_packets;
- 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';
- fclose (fp);
- return 1;
- }
- }
- mntent = getmntent (fp);
- }
- fclose (fp);
- }
+ return 1;
+err:
+ close(fd);
+ fd = -1;
return 0;
- }
+}
/********************************************************************
- *
- * path_to_route - find the path to the route tables in the proc file system
+ * get_ppp_stats_sysfs - return statistics for the link, using the files in sysfs,
+ * this provides native 64-bit counters.
*/
+static int
+get_ppp_stats_sysfs(int u, struct pppd_stats *stats)
+{
+ char fname[PATH_MAX+1];
+ char buf[21], *err; /* 2^64 < 10^20 */
+ int blen, fd, rlen;
+ unsigned long long val;
+
+ struct {
+ const char* fname;
+ void* ptr;
+ unsigned size;
+ } slist[] = {
+#define statfield(fn, field) { .fname = #fn, .ptr = &stats->field, .size = sizeof(stats->field) }
+ statfield(rx_bytes, bytes_in),
+ statfield(tx_bytes, bytes_out),
+ statfield(rx_packets, pkts_in),
+ statfield(tx_packets, pkts_out),
+#undef statfield
+ };
+
+ blen = snprintf(fname, sizeof(fname), "/sys/class/net/%s/statistics/", ifname);
+ if (blen >= sizeof(fname))
+ return 0; /* ifname max 15, so this should be impossible */
+
+ for (int i = 0; i < sizeof(slist) / sizeof(*slist); ++i) {
+ if (snprintf(fname + blen, sizeof(fname) - blen, "%s", slist[i].fname) >= sizeof(fname) - blen) {
+ fname[blen] = 0;
+ error("sysfs stats: filename %s/%s overflowed PATH_MAX", fname, slist[i].fname);
+ return 0;
+ }
-static char *path_to_route (void)
- {
- if (! path_to_procfs())
- {
- syslog (LOG_ERR, "proc file system not mounted");
- return 0;
- }
- strcat (route_buffer, "/net/route");
- return (route_buffer);
- }
+ fd = open(fname, O_RDONLY);
+ if (fd < 0) {
+ error("%s: %m", fname);
+ return 0;
+ }
+
+ rlen = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ if (rlen < 0) {
+ error("%s: %m", fname);
+ return 0;
+ }
+ /* trim trailing \n if present */
+ while (rlen > 0 && buf[rlen-1] == '\n')
+ rlen--;
+ buf[rlen] = 0;
+
+ errno = 0;
+ val = strtoull(buf, &err, 10);
+ if (*buf < '0' || *buf > '9' || errno != 0 || *err) {
+ error("string to number conversion error converting %s (from %s) for remaining string %s%s%s",
+ buf, fname, err, errno ? ": " : "", errno ? strerror(errno) : "");
+ return 0;
+ }
+ switch (slist[i].size) {
+#define stattype(type) case sizeof(type): *(type*)slist[i].ptr = (type)val; break
+ stattype(uint64_t);
+ stattype(uint32_t);
+ stattype(uint16_t);
+ stattype(uint8_t);
+#undef stattype
+ default:
+ error("Don't know how to store stats for %s of size %u", slist[i].fname, slist[i].size);
+ return 0;
+ }
+ }
+
+ return 1;
+}
/********************************************************************
+ * Periodic timer function to be used to keep stats up to date in case of ioctl
+ * polling.
*
- * close_route_table - close the interface to the route table
+ * Given the 25s interval this should be fine up to data rates of 1.37Gbps.
+ * If you do change the timer, remember to also bring the get_ppp_stats (which
+ * sets up the initial trigger) as well.
*/
-
-static void close_route_table (void)
- {
- if (route_fd != (FILE *) 0)
- {
- fclose (route_fd);
- route_fd = (FILE *) 0;
- }
- }
+static void
+ppp_stats_poller(void* u)
+{
+ struct pppd_stats dummy;
+ get_ppp_stats_ioctl((long)u, &dummy);
+ TIMEOUT(ppp_stats_poller, u, 25);
+}
/********************************************************************
- *
- * open_route_table - open the interface to the route table
+ * get_ppp_stats - return statistics for the link.
*/
+int get_ppp_stats(int u, struct pppd_stats *stats)
+{
+ static int (*func)(int, struct pppd_stats*) = NULL;
+
+ if (!func) {
+ if (get_ppp_stats_rtnetlink(u, stats)) {
+ func = get_ppp_stats_rtnetlink;
+ return 1;
+ }
+ if (get_ppp_stats_sysfs(u, stats)) {
+ func = get_ppp_stats_sysfs;
+ return 1;
+ }
+ warn("statistics falling back to ioctl which only supports 32-bit counters");
+ func = get_ppp_stats_ioctl;
+ TIMEOUT(ppp_stats_poller, (void*)(long)u, 25);
+ }
-static int open_route_table (void)
- {
- char *path;
+ return func(u, stats);
+}
- close_route_table();
+/********************************************************************
+ *
+ * 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.
+ */
- path = path_to_route();
- if (path == NULL)
- {
- return 0;
- }
+int ccp_fatal_error (int unit)
+{
+ int flags;
- route_fd = fopen (path, "r");
- if (route_fd == (FILE *) 0)
- {
- syslog (LOG_ERR, "can not open %s: %m(%d)", path, errno);
- return 0;
- }
- return 1;
- }
+ if (ioctl(ppp_dev_fd, PPPIOCGFLAGS, &flags) < 0) {
+ error("Couldn't read compression error flags: %m");
+ flags = 0;
+ }
+ return flags & SC_DC_FERROR;
+}
/********************************************************************
*
- * read_route_table - read the next entry from the route table
+ * path_to_procfs - find the path to the proc file system mount point
*/
+static char proc_path[MAXPATHLEN];
+static int proc_path_len;
-static int read_route_table (struct rtentry *rt)
- {
- static char delims[] = " \t\n";
- char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr;
-
- memset (rt, '\0', sizeof (struct rtentry));
-
- for (;;)
- {
- 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;
- }
- }
+static char *path_to_procfs(const char *tail)
+{
+ struct mntent *mntent;
+ FILE *fp;
- ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
- strtoul (dst_ptr, NULL, 16);
+ 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);
+ }
+ }
- ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul (gw_ptr, NULL, 16);
+ strlcpy(proc_path + proc_path_len, tail,
+ sizeof(proc_path) - proc_path_len);
+ return proc_path;
+}
- rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16);
- rt->rt_dev = dev_ptr;
+/*
+ * /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_metric_col, route_mask_col;
+static int route_num_cols;
- return 1;
- }
+static int open_route_table (void);
+static void close_route_table (void);
+static int read_route_table (struct rtentry *rt);
/********************************************************************
*
- * defaultroute_exists - determine if there is a default route
+ * close_route_table - close the interface to the route table
*/
-static int defaultroute_exists (struct rtentry *rt)
- {
- int result = 0;
+static void close_route_table (void)
+{
+ if (route_fd != (FILE *) 0) {
+ fclose (route_fd);
+ route_fd = (FILE *) 0;
+ }
+}
- if (!open_route_table())
- {
- return 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_metric_col = 6;
+ 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;
+ }
+
+ SET_SA_FAMILY (rt->rt_dst, AF_INET);
+ SET_SA_FAMILY (rt->rt_gateway, AF_INET);
+
+ 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_metric = (short) strtoul(cols[route_metric_col], NULL, 10);
+ rt->rt_dev = cols[route_dev_col];
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * defaultroute_exists - determine if there is a default route
+ * with the given metric (or negative for any)
+ */
+
+static int defaultroute_exists (struct rtentry *rt, int metric)
+{
+ int result = 0;
- while (read_route_table(rt) != 0)
- {
- if ((rt->rt_flags & RTF_UP) == 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 && (metric < 0
+ || rt->rt_metric == metric)) {
+ 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 */
- if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 0L)
- {
+ 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.
+ *
+ * If the global default_rt_repl_rest flag is set, then this function
+ * already replaced the original system defaultroute with some other
+ * route and it should just replace the current defaultroute with
+ * another one, without saving the current route. Use: demand mode,
+ * when pppd sets first a defaultroute it it's temporary ppp0 addresses
+ * and then changes the temporary addresses to the addresses for the real
+ * ppp connection when it has come up.
*/
-int sifdefaultroute (int unit, u_int32_t gateway)
- {
- struct rtentry rt;
+int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
+{
+ struct rtentry rt, tmp_rt;
+ struct rtentry *del_rt = NULL;
+
+ if (default_rt_repl_rest) {
+ /* We have already replaced the original defaultroute, if we
+ * are called again, we will delete the current default route
+ * and set the new default route in this function.
+ * - this is normally only the case the doing demand: */
+ if (defaultroute_exists(&tmp_rt, -1))
+ del_rt = &tmp_rt;
+ } else if (defaultroute_exists(&old_def_rt, -1 ) &&
+ strcmp( old_def_rt.rt_dev, ifname) != 0) {
+ /*
+ * We did not yet replace an existing default route, let's
+ * check if we should save and replace a default route:
+ */
+ u_int32_t old_gateway = SIN_ADDR(old_def_rt.rt_gateway);
+
+ if (old_gateway != gateway) {
+ if (!replace) {
+ error("not replacing default route to %s [%I]",
+ old_def_rt.rt_dev, old_gateway);
+ return 0;
+ } else {
+ /* we need to copy rt_dev because we need it permanent too: */
+ char * tmp_dev = malloc(strlen(old_def_rt.rt_dev)+1);
+ strcpy(tmp_dev, old_def_rt.rt_dev);
+ old_def_rt.rt_dev = tmp_dev;
+
+ notice("replacing old default route to %s [%I]",
+ old_def_rt.rt_dev, old_gateway);
+ default_rt_repl_rest = 1;
+ del_rt = &old_def_rt;
+ }
+ }
+ }
- if (defaultroute_exists(&rt))
- {
- u_int32_t old_gateway = ((struct sockaddr_in *) (&rt.rt_gateway))->
- sin_addr.s_addr;
-
- if (old_gateway != gateway)
- {
- syslog (LOG_ERR,
- "ppp not replacing existing default route to %s[%s]",
- rt.rt_dev,
- inet_ntoa (old_gateway));
- }
- return 0;
- }
+ memset (&rt, 0, sizeof (rt));
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
- 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(sock_fd, SIOCADDRT, &rt) < 0)
- {
+ rt.rt_dev = ifname;
+ rt.rt_metric = dfl_route_metric + 1; /* +1 for binary compatibility */
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ SIN_ADDR(rt.rt_genmask) = 0L;
+ }
+
+ rt.rt_flags = RTF_UP;
+ if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
if ( ! ok_error ( errno ))
- {
- syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m(%d)", errno);
- }
+ error("default route ioctl(SIOCADDRT): %m");
return 0;
- }
+ }
+ if (default_rt_repl_rest && del_rt)
+ if (ioctl(sock_fd, SIOCDELRT, del_rt) < 0) {
+ if ( ! ok_error ( errno ))
+ error("del old default route ioctl(SIOCDELRT): %m(%d)", errno);
+ return 0;
+ }
- default_route_gateway = gateway;
+ have_default_route = 1;
return 1;
- }
+}
/********************************************************************
*
* cifdefaultroute - delete a default route through the address given.
*/
-int cifdefaultroute (int unit, u_int32_t gateway)
- {
+int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
+{
struct rtentry rt;
- default_route_gateway = 0;
+ have_default_route = 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(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
- {
- if (still_ppp())
- {
+
+ rt.rt_dev = ifname;
+
+ rt.rt_dev = ifname;
+ rt.rt_metric = dfl_route_metric + 1; /* +1 for binary compatibility */
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ SIN_ADDR(rt.rt_genmask) = 0L;
+ }
+
+ rt.rt_flags = RTF_UP;
+ if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp()) {
+ if ( ! ok_error ( errno ))
+ error("default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ }
+ if (default_rt_repl_rest) {
+ notice("restoring old default route to %s [%I]",
+ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
+ if (ioctl(sock_fd, SIOCADDRT, &old_def_rt) < 0) {
+ if ( ! ok_error ( errno ))
+ error("restore default route ioctl(SIOCADDRT): %m(%d)", errno);
+ return 0;
+ }
+ default_rt_repl_rest = 0;
+ }
+
+ return 1;
+}
+
+#ifdef PPP_WITH_IPV6CP
+/*
+ * /proc/net/ipv6_route parsing stuff.
+ */
+static int route_dest_plen_col;
+static int open_route6_table (void);
+static int read_route6_table (struct in6_rtmsg *rt);
+
+/********************************************************************
+ *
+ * open_route6_table - open the interface to the route table
+ */
+static int open_route6_table (void)
+{
+ char *path;
+
+ close_route_table();
+
+ path = path_to_procfs("/net/ipv6_route");
+ route_fd = fopen (path, "r");
+ if (route_fd == NULL) {
+ error("can't open routing table %s: %m", path);
+ return 0;
+ }
+
+ /* default to usual columns */
+ route_dest_col = 0;
+ route_dest_plen_col = 1;
+ route_gw_col = 4;
+ route_metric_col = 5;
+ route_flags_col = 8;
+ route_dev_col = 9;
+ route_num_cols = 10;
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * read_route6_table - read the next entry from the route table
+ */
+
+static void hex_to_in6_addr(struct in6_addr *addr, const char *s)
+{
+ char hex8[9];
+ unsigned i;
+ uint32_t v;
+
+ hex8[8] = 0;
+ for (i = 0; i < 4; i++) {
+ memcpy(hex8, s + 8*i, 8);
+ v = strtoul(hex8, NULL, 16);
+ addr->s6_addr32[i] = v;
+ }
+}
+
+static int read_route6_table(struct in6_rtmsg *rt)
+{
+ char *cols[ROUTE_MAX_COLS], *p;
+ int col;
+
+ memset (rt, '\0', sizeof (struct in6_rtmsg));
+
+ 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;
+ }
+
+ hex_to_in6_addr(&rt->rtmsg_dst, cols[route_dest_col]);
+ rt->rtmsg_dst_len = strtoul(cols[route_dest_plen_col], NULL, 16);
+ hex_to_in6_addr(&rt->rtmsg_gateway, cols[route_gw_col]);
+
+ rt->rtmsg_metric = strtoul(cols[route_metric_col], NULL, 16);
+ rt->rtmsg_flags = strtoul(cols[route_flags_col], NULL, 16);
+ rt->rtmsg_ifindex = if_nametoindex(cols[route_dev_col]);
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * defaultroute6_exists - determine if there is a default route
+ */
+
+static int defaultroute6_exists (struct in6_rtmsg *rt, int metric)
+{
+ int result = 0;
+
+ if (!open_route6_table())
+ return 0;
+
+ while (read_route6_table(rt) != 0) {
+ if ((rt->rtmsg_flags & RTF_UP) == 0)
+ continue;
+
+ if (rt->rtmsg_dst_len != 0)
+ continue;
+ if (rt->rtmsg_dst.s6_addr32[0] == 0L
+ && rt->rtmsg_dst.s6_addr32[1] == 0L
+ && rt->rtmsg_dst.s6_addr32[2] == 0L
+ && rt->rtmsg_dst.s6_addr32[3] == 0L
+ && (metric < 0 || rt->rtmsg_metric == metric)) {
+ result = 1;
+ break;
+ }
+ }
+
+ close_route_table();
+ return result;
+}
+
+/********************************************************************
+ *
+ * sif6defaultroute - assign a default route through the address given.
+ *
+ * If the global default_rt_repl_rest flag is set, then this function
+ * already replaced the original system defaultroute with some other
+ * route and it should just replace the current defaultroute with
+ * another one, without saving the current route. Use: demand mode,
+ * when pppd sets first a defaultroute it it's temporary ppp0 addresses
+ * and then changes the temporary addresses to the addresses for the real
+ * ppp connection when it has come up.
+ */
+
+int sif6defaultroute (int unit, eui64_t ouraddr, eui64_t gateway)
+{
+ struct in6_rtmsg rt;
+ char buf[IF_NAMESIZE];
+
+ if (defaultroute6_exists(&rt, dfl_route_metric) &&
+ rt.rtmsg_ifindex != if_nametoindex(ifname)) {
+ if (rt.rtmsg_flags & RTF_GATEWAY)
+ error("not replacing existing default route via gateway");
+ else
+ error("not replacing existing default route through %s",
+ if_indextoname(rt.rtmsg_ifindex, buf));
+ return 0;
+ }
+
+ memset (&rt, 0, sizeof (rt));
+
+ rt.rtmsg_ifindex = if_nametoindex(ifname);
+ rt.rtmsg_metric = dfl_route_metric + 1; /* +1 for binary compatibility */
+ rt.rtmsg_dst_len = 0;
+
+ rt.rtmsg_flags = RTF_UP;
+ if (ioctl(sock6_fd, SIOCADDRT, &rt) < 0) {
+ if ( ! ok_error ( errno ))
+ error("default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
+
+ have_default_route6 = 1;
+ return 1;
+}
+
+/********************************************************************
+ *
+ * cif6defaultroute - delete a default route through the address given.
+ */
+
+int cif6defaultroute (int unit, eui64_t ouraddr, eui64_t gateway)
+{
+ struct in6_rtmsg rt;
+
+ have_default_route6 = 0;
+
+ memset (&rt, '\0', sizeof (rt));
+
+ rt.rtmsg_ifindex = if_nametoindex(ifname);
+ rt.rtmsg_metric = dfl_route_metric + 1; /* +1 for binary compatibility */
+ rt.rtmsg_dst_len = 0;
+
+ rt.rtmsg_flags = RTF_UP;
+ if (ioctl(sock6_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp()) {
if ( ! ok_error ( errno ))
- {
- syslog (LOG_ERR,
- "default route ioctl(SIOCDELRT): %m(%d)", errno);
- }
+ error("default route ioctl(SIOCDELRT): %m");
return 0;
- }
- }
+ }
+ }
return 1;
- }
+}
+#endif /* PPP_WITH_IPV6CP */
/********************************************************************
*
*/
int sifproxyarp (int unit, u_int32_t his_adr)
- {
+{
struct arpreq arpreq;
+ char *forw_path;
- 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;
+ 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, arpreq.arp_dev))
- {
- 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;
- }
-
- if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 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 ))
- {
- syslog(LOG_ERR, "ioctl(SIOCSARP): %m(%d)", errno);
- }
+ error("ioctl(SIOCSARP): %m");
return 0;
- }
- }
+ }
+ proxy_arp_addr = his_adr;
+ has_proxy_arp = 1;
+
+ if (tune_kernel) {
+ forw_path = path_to_procfs("/sys/net/ipv4/ip_forward");
+ if (forw_path != 0) {
+ int fd = open(forw_path, O_WRONLY);
+ if (fd >= 0) {
+ if (write(fd, "1", 1) != 1)
+ error("Couldn't enable IP forwarding: %m");
+ close(fd);
+ }
+ }
+ }
+ }
- proxy_arp_addr = his_adr;
- has_proxy_arp = 1;
return 1;
- }
+}
/********************************************************************
*
*/
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(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0)
- {
+ 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 ))
- {
- syslog(LOG_WARNING, "ioctl(SIOCDARP): %m(%d)", errno);
- }
+ warn("ioctl(SIOCDARP): %m");
return 0;
- }
- }
- has_proxy_arp = 0;
+ }
+ }
return 1;
- }
-
+}
+
/********************************************************************
*
* get_ether_addr - get the hardware address of an interface on the
static int get_ether_addr (u_int32_t ipaddr,
struct sockaddr *hwaddr,
- char *name)
- {
- struct ifreq *ifr, *ifend, *ifp;
- int i;
+ char *name, int namelen)
+{
+ struct ifreq *ifr, *ifend;
u_int32_t ina, mask;
- struct sockaddr_dl *dla;
- struct ifreq ifreq;
+ char *aliasp;
+ struct ifreq ifreq, bestifreq;
struct ifconf ifc;
struct ifreq ifs[MAX_IFS];
-
+
+ u_int32_t bestmask=0;
+ int found_interface = 0;
+
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
- if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
- {
+ if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
if ( ! ok_error ( errno ))
- {
- syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m(%d)", errno);
- }
+ error("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__);
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 = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
- ifreq.ifr_name));
+ 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));
/*
* 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;
- }
+ continue;
- mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
- SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
- ip_ntoa(ina), ntohl(mask)));
+ mask = SIN_ADDR(ifreq.ifr_addr);
if (((ipaddr ^ ina) & mask) != 0)
- {
- continue;
- }
- break;
- }
- }
-
- if (ifr >= ifend)
- {
- return 0;
- }
+ continue; /* no match */
+ /* matched */
+ if (mask >= bestmask) {
+ /* Compare using >= instead of > -- it is possible for
+ an interface to have a netmask of 0.0.0.0 */
+ found_interface = 1;
+ bestifreq = ifreq;
+ bestmask = mask;
+ }
+ }
+ }
+
+ if (!found_interface) return 0;
+
+ strlcpy(name, bestifreq.ifr_name, namelen);
- memcpy (name, ifreq.ifr_name, sizeof(ifreq.ifr_name));
- syslog(LOG_INFO, "found interface %s for proxy arp", name);
+ /* 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)
- {
- syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno);
- return 0;
- }
+ memset (&bestifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
+ if (ioctl (sock_fd, SIOCGIFHWADDR, &bestifreq) < 0) {
+ error("SIOCGIFHWADDR(%s): %m", bestifreq.ifr_name);
+ return 0;
+ }
memcpy (hwaddr,
- &ifreq.ifr_hwaddr,
+ &bestifreq.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 -1;
+ 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_ether_hwaddr - get the hardware address for the first
+ * ethernet-style interface on this system.
+ */
+int
+get_first_ether_hwaddr(u_char *addr)
+{
+ struct if_nameindex *if_ni, *i;
+ struct ifreq ifreq;
+ int ret, sock_fd;
+
+ sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock_fd < 0)
+ return -1;
+
+ if_ni = if_nameindex();
+ if (!if_ni) {
+ close(sock_fd);
+ return -1;
+ }
+
+ ret = -1;
+
+ for (i = if_ni; !(i->if_index == 0 && i->if_name == NULL); i++) {
+ memset(&ifreq.ifr_hwaddr, 0, sizeof(struct sockaddr));
+ strlcpy(ifreq.ifr_name, i->if_name, sizeof(ifreq.ifr_name));
+ ret = ioctl(sock_fd, SIOCGIFHWADDR, &ifreq);
+ if (ret >= 0 && ifreq.ifr_hwaddr.sa_family == ARPHRD_ETHER) {
+ memcpy(addr, ifreq.ifr_hwaddr.sa_data, 6);
+ break;
+ }
+ ret = -1;
+ }
+
+ if_freenameindex(if_ni);
+ close(sock_fd);
+
+ return ret;
+}
/********************************************************************
*
*/
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))
- {
+ 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);
/*
*/
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
- if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0)
- {
+ if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
if ( ! ok_error ( errno ))
- {
- syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m(%d)", errno);
- }
+ warn("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__);
return mask;
- }
-
+ }
+
ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
- for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
- {
+ 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;
+ 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.
*/
- strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ 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 |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
+ mask |= SIN_ADDR(ifreq.ifr_addr);
break;
- }
+ }
return mask;
- }
+}
/********************************************************************
*
static void decode_version (char *buf, int *version,
int *modification, int *patch)
- {
- *version = (int) strtoul (buf, &buf, 10);
+{
+ char *endp;
+
+ *version = (int) strtoul (buf, &endp, 10);
*modification = 0;
*patch = 0;
-
- if (*buf == '.')
- {
- ++buf;
- *modification = (int) strtoul (buf, &buf, 10);
- if (*buf == '.')
- {
- ++buf;
+
+ if (endp != buf && *endp == '.') {
+ buf = endp + 1;
+ *modification = (int) strtoul (buf, &endp, 10);
+ if (endp != buf && *endp == '.') {
+ buf = endp + 1;
*patch = (int) strtoul (buf, &buf, 10);
- }
- }
-
- if (*buf != '\0')
- {
- *version =
- *modification =
- *patch = 0;
- }
- }
+ }
+ }
+}
/********************************************************************
*
- * Procedure to determine if the PPP line dicipline is registered.
+ * Procedure to determine if the PPP line discipline is registered.
*/
-int
+static int
ppp_registered(void)
- {
+{
int local_fd;
- 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(%d)", devnam, errno);
+ 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;
- }
+ }
- initfdflags = fcntl(local_fd, F_GETFL);
- if (initfdflags == -1)
- {
- syslog(LOG_ERR, "Couldn't get device fd flags: %m(%d)", errno);
- close (local_fd);
- return 0;
- }
+ /*
+ * Try to put the device into the PPP discipline.
+ */
+ if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) {
+ error("ioctl(TIOCSETD(PPP)): %m (line %d)", __LINE__);
+ } else
+ ret = 1;
+
+ close(local_fd);
+ close(mfd);
+ return ret;
+}
- initfdflags &= ~O_NONBLOCK;
- fcntl(local_fd, F_SETFL, initfdflags);
-/*
- * 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(%d)", errno);
- close (local_fd);
- return 0;
- }
-
- if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0)
- {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
- close (local_fd);
- return 0;
- }
-
- if (ioctl(local_fd, TIOCSETD, &init_disc) < 0)
- {
- syslog(LOG_ERR, "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).
+/********************************************************************
+ *
+ * ppp_available - check whether the system has any ppp interfaces
+ * (in fact we check whether we can do an ioctl on ppp0).
*/
int ppp_available(void)
- {
- int s, ok;
+{
+ int s, ok, fd;
struct ifreq ifr;
int size;
int my_version, my_modification, my_patch;
- extern char *no_ppp_msg;
+ int osmaj, osmin, ospatch;
+
+ /* 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 (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)) {
+ error("Couldn't open the /dev/ppp device: %m");
+ if (errno == ENOENT)
+ no_ppp_msg =
+ "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";
+ else if (errno == ENODEV || errno == ENXIO)
+ no_ppp_msg =
+ "Please load the ppp_generic kernel module.\n";
+ return 0;
+ }
+
+ /* we are running on a really really old kernel */
+ 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";
+
/*
* 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;
- }
+ ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
- {
- ok = 0;
- }
-
- if (!ok)
- {
- no_ppp_msg =
- "This system lacks kernel support for PPP. To include PPP support\n"
- "in the kernel, please follow the steps detailed in the "
- "README.linux\nfile in the ppp-2.3 distribution.\n";
- }
+ 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.
*/
- else
- {
+ if (ok) {
char abBuffer [1024];
ifr.ifr_data = abBuffer;
size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
- ok = size >= 0;
-
- if (ok)
- {
- decode_version (abBuffer,
- &driver_version,
- &driver_modification,
- &driver_patch);
- }
-
- if (!ok)
- {
- driver_version =
- driver_modification =
- driver_patch = 0;
- }
+ if (size < 0) {
+ error("Couldn't read driver version: %m");
+ ok = 0;
+ no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
+
+ } else {
+ decode_version(abBuffer,
+ &driver_version,
+ &driver_modification,
+ &driver_patch);
/*
* Validate the version of the driver against the version that we used.
*/
- decode_version (PPP_VERSION,
- &my_version,
- &my_modification,
- &my_patch);
-
- /* The version numbers must match */
- if (driver_version != my_version)
- {
- ok = 0;
- }
-
- /* The modification levels must be legal */
- if (driver_modification < my_modification)
- {
- ok = 0;
- }
-
- close (s);
- if (!ok)
- {
- sprintf (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;
- }
- }
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+ }
+ close(s);
return ok;
- }
+}
+#ifndef HAVE_LOGWTMP
/********************************************************************
*
* Update the wtmp file with the appropriate user name and tty device.
*/
-int logwtmp (char *line, char *name, char *host)
- {
- int wtmp;
+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 */;
+ /* 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));
/* 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,
+ 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)
- {
+ 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);
+ if (write (wtmp, (char *)&ut, sizeof(ut)) != sizeof(ut))
+ warn("error writing %s: %m", _PATH_WTMP);
flock(wtmp, LOCK_UN);
- }
- }
+
+ close (wtmp);
+ }
+#endif
+}
+#endif /* HAVE_LOGWTMP */
/********************************************************************
- * Code for locking/unlocking the serial device.
- * This code is derived from chat.c.
+ *
+ * sifvjcomp - config tcp header compression
*/
-/*
- * lock - create a lock file for the named device
- */
-
-int lock (char *dev)
- {
- char hdb_lock_buffer[12];
- int fd, n;
- int pid = getpid();
- char *p;
-
- p = strrchr(dev, '/');
- if (p != NULL)
- {
- dev = ++p;
- }
-
- lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
- if (lock_file == NULL)
- {
- novm("lock file name");
- }
-
- strcpy (lock_file, LOCK_PREFIX);
- strcat (lock_file, dev);
-/*
- * Attempt to create the lock file at this point.
- */
- while (1)
- {
- fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644);
- if (fd >= 0)
- {
- pid = getpid();
-#ifndef PID_BINARY
- sprintf (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)
- {
- fd = open(lock_file, O_RDONLY, 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);
- break;
- }
-
- /* See the process still exists. */
- if (n > 0)
- {
-#ifndef PID_BINARY
- hdb_lock_buffer[n] = '\0';
- sscanf (hdb_lock_buffer, " %d", &pid);
-#else
- pid = ((int *) hdb_lock_buffer)[0];
-#endif
- if (pid == 0 || (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)",
- dev, pid);
- continue;
- }
+int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
+{
+ u_int x;
- syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid);
- break;
- }
+ if (vjcomp) {
+ if (ioctl(ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
+ error("Couldn't set up TCP header compression: %m");
+ vjcomp = 0;
+ }
+ }
- syslog(LOG_ERR, "Can't create lock file %s: %m(%d)", lock_file, errno);
- break;
- }
+ x = (vjcomp? SC_COMP_TCP: 0) | (cidcomp? 0: SC_NO_TCP_CCID);
+ modify_flags(ppp_dev_fd, SC_COMP_TCP|SC_NO_TCP_CCID, x);
- free(lock_file);
- lock_file = NULL;
- return -1;
+ return 1;
}
-
/********************************************************************
*
- * unlock - remove our lockfile
+ * sifup - Config the interface up and enable IP packets to pass.
*/
-void unlock(void)
- {
- if (lock_file)
- {
- unlink(lock_file);
- free(lock_file);
- lock_file = NULL;
- }
- }
+int sifup(int u)
+{
+ int ret;
+
+ if ((ret = setifstate(u, 1)))
+ if_is_up++;
+
+ return ret;
+}
/********************************************************************
*
- * sifvjcomp - config tcp header compression
+ * sifdown - Disable the indicated protocol and config the interface
+ * down if there are no remaining protocols.
*/
-int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
- {
- u_int x = get_flags();
+int sifdown (int u)
+{
+ if (if_is_up && --if_is_up > 0)
+ return 1;
- if (vjcomp)
- {
- if (ioctl (ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
- {
- if (! ok_error (errno))
- {
- syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m(%d)", errno);
- }
- vjcomp = 0;
- }
- }
+#ifdef PPP_WITH_IPV6CP
+ if (if6_is_up)
+ return 1;
+#endif /* PPP_WITH_IPV6CP */
- 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 setifstate(u, 0);
+}
- return 1;
- }
+#ifdef PPP_WITH_IPV6CP
+/********************************************************************
+ *
+ * sif6up - Config the interface up for IPv6
+ */
+
+int sif6up(int u)
+{
+ int ret;
+
+ if ((ret = setifstate(u, 1)))
+ if6_is_up = 1;
+
+ return ret;
+}
/********************************************************************
*
- * sifup - Config the interface up and enable IP packets to pass.
+ * sif6down - Disable the IPv6CP protocol and config the interface
+ * down if there are no remaining protocols.
*/
-int sifup (int u)
- {
- struct ifreq ifr;
+int sif6down (int u)
+{
+ if6_is_up = 0;
- memset (&ifr, '\0', sizeof (ifr));
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
- {
- if (! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
- }
- return 0;
- }
+ if (if_is_up)
+ return 1;
- ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
- if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
- {
- if (! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
- }
- return 0;
- }
- if_is_up = 1;
- return 1;
- }
+ return setifstate(u, 0);
+}
+#endif /* PPP_WITH_IPV6CP */
/********************************************************************
*
- * sifdown - Config the interface down and disable IP.
+ * setifstate - Config the interface up or down
*/
-int sifdown (int u)
- {
+static int setifstate (int u, int state)
+{
struct ifreq ifr;
- if_is_up = 0;
-
memset (&ifr, '\0', sizeof (ifr));
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
- {
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
if (! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m(%d)", errno);
- }
+ error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__);
return 0;
- }
+ }
- ifr.ifr_flags &= ~IFF_UP;
+ if (state)
+ ifr.ifr_flags |= IFF_UP;
+ else
+ ifr.ifr_flags &= ~IFF_UP;
ifr.ifr_flags |= IFF_POINTOPOINT;
- if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
- {
+ if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
if (! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m(%d)", errno);
- }
+ error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__);
return 0;
- }
+ }
return 1;
- }
+}
/********************************************************************
*
int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
u_int32_t net_mask)
- {
- struct ifreq ifr;
+{
+ 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_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)
- {
+ SIN_ADDR(ifr.ifr_addr) = our_adr;
+ if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (errno != EEXIST) {
if (! ok_error (errno))
- {
- syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m(%d)", errno);
- }
- }
- else
- {
- syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
- }
- return (0);
- }
+ error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
+ }
+ 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))
- {
- syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m(%d)", errno);
- }
- return (0);
- }
+ if (his_adr != 0) {
+ SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
+ if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFDSTADDR): %m (line %d)", __LINE__);
+ return (0);
+ }
+ }
/*
- * Set the netmask
- */
- 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)
- {
+ * Set the netmask.
+ * For recent kernels, force the netmask to 255.255.255.255.
+ */
+ if (kernel_version >= KVERSION(2,1,16))
+ net_mask = ~0L;
+ if (net_mask != 0) {
+ SIN_ADDR(ifr.ifr_netmask) = net_mask;
+ if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
if (! ok_error (errno))
- {
- syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m(%d)", errno);
- }
+ error("ioctl(SIOCSIFNETMASK): %m (line %d)", __LINE__);
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 */
+ 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;
+ SIN_ADDR(rt.rt_gateway) = 0L;
+ SIN_ADDR(rt.rt_dst) = his_adr;
+ rt.rt_flags = RTF_UP | RTF_HOST;
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ SIN_ADDR(rt.rt_genmask) = -1L;
+ }
+
+ if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCADDRT) device route: %m (line %d)", __LINE__);
+ return (0);
+ }
+ }
+
+ /* 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;
- if (ioctl(sock_fd, SIOCADDRT, &rt) < 0)
- {
- if (! ok_error (errno))
- {
- syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m(%d)", errno);
- }
- return (0);
- }
return 1;
- }
+}
/********************************************************************
*
*/
int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
- {
- struct rtentry rt;
+{
+ struct ifreq ifr;
+
+ if (kernel_version < KVERSION(2,1,16)) {
/*
* Delete the route through the device
*/
- memset (&rt, '\0', sizeof (rt));
+ struct rtentry rt;
+ memset (&rt, '\0', sizeof (rt));
+
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ rt.rt_dev = ifname;
+
+ SIN_ADDR(rt.rt_gateway) = 0;
+ SIN_ADDR(rt.rt_dst) = his_adr;
+ rt.rt_flags = RTF_UP | RTF_HOST;
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ SIN_ADDR(rt.rt_genmask) = -1L;
+ }
+
+ if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp() && ! ok_error (errno))
+ error("ioctl(SIOCDELRT) device route: %m (line %d)", __LINE__);
+ return (0);
+ }
+ }
+
+ /* This way it is possible to have an IPv6-only interface */
+ memset(&ifr, 0, sizeof(ifr));
+ SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
+ strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+
+ if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno)) {
+ error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
+ return 0;
+ }
+ }
+
+ our_old_addr = our_adr;
- 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(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
- {
- if (still_ppp() && ! ok_error (errno))
- {
- syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m(%d)", errno);
- }
- return (0);
- }
return 1;
- }
+}
+#ifdef PPP_WITH_IPV6CP
/********************************************************************
*
- * open_loopback - open the device we use for getting packets
- * in demand mode. Under Linux, we use our existing fd
- * to the ppp driver.
+ * sif6addr_rtnetlink - Config the interface with both IPv6 link-local addresses via rtnetlink
*/
-void
-open_ppp_loopback(void)
- {
- int flags;
+static int sif6addr_rtnetlink(unsigned int iface, eui64_t our_eui64, eui64_t his_eui64)
+{
+ struct {
+ struct nlmsghdr nlh;
+ struct ifaddrmsg ifa;
+ struct {
+ struct rtattr rta;
+ struct in6_addr addr;
+ } addrs[2];
+ } nlreq;
+ int resp;
+
+ memset(&nlreq, 0, sizeof(nlreq));
+ nlreq.nlh.nlmsg_len = sizeof(nlreq);
+ nlreq.nlh.nlmsg_type = RTM_NEWADDR;
+ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE;
+ nlreq.ifa.ifa_family = AF_INET6;
+ nlreq.ifa.ifa_prefixlen = 128;
+ nlreq.ifa.ifa_flags = IFA_F_NODAD | IFA_F_PERMANENT;
+ nlreq.ifa.ifa_scope = RT_SCOPE_LINK;
+ nlreq.ifa.ifa_index = iface;
+ nlreq.addrs[0].rta.rta_len = sizeof(nlreq.addrs[0]);
+ nlreq.addrs[0].rta.rta_type = IFA_LOCAL;
+ IN6_LLADDR_FROM_EUI64(nlreq.addrs[0].addr, our_eui64);
+ nlreq.addrs[1].rta.rta_len = sizeof(nlreq.addrs[1]);
+ nlreq.addrs[1].rta.rta_type = IFA_ADDRESS;
+
+ /*
+ * To set only local address, older kernel expects that local address is
+ * in IFA_ADDRESS field (not IFA_LOCAL). New kernels with support for peer
+ * address, ignore IFA_ADDRESS if is same as IFA_LOCAL. So for backward
+ * compatibility when setting only local address, set it via both IFA_LOCAL
+ * and IFA_ADDRESS fields. Same logic is implemented in 'ip address' command
+ * from iproute2 project.
+ */
+ if (!eui64_iszero(his_eui64))
+ IN6_LLADDR_FROM_EUI64(nlreq.addrs[1].addr, his_eui64);
+ else
+ IN6_LLADDR_FROM_EUI64(nlreq.addrs[1].addr, our_eui64);
+
+ resp = rtnetlink_msg("RTM_NEWADDR/NLM_F_CREATE", NULL, &nlreq, sizeof(nlreq), NULL, NULL, 0);
+ if (resp) {
+ /*
+ * Linux kernel versions prior 3.11 do not support setting IPv6 peer
+ * addresses and error response is expected. On older kernel versions
+ * do not show this error message. On error pppd tries to fallback to
+ * the old IOCTL method.
+ */
+ errno = (resp < 0) ? -resp : EINVAL;
+ if (kernel_version >= KVERSION(3,11,0))
+ error("sif6addr_rtnetlink: %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sif6addr - Config the interface with an IPv6 link-local address
+ */
+int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
+{
+ struct in6_ifreq ifr6;
+ struct ifreq ifr;
+ struct in6_rtmsg rt6;
+ int ret;
+
+ if (sock6_fd < 0) {
+ errno = -sock6_fd;
+ error("IPv6 socket creation failed: %m");
+ return 0;
+ }
+ memset(&ifr, 0, sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+ if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
+ error("sif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ if (kernel_version >= KVERSION(2,1,16)) {
+ /* Set both local address and remote peer address (with route for it) via rtnetlink */
+ ret = sif6addr_rtnetlink(ifr.ifr_ifindex, our_eui64, his_eui64);
+ } else {
+ ret = 0;
+ }
+
+ /*
+ * Linux kernel versions prior 3.11 do not support setting IPv6 peer address
+ * via rtnetlink. So if sif6addr_rtnetlink() fails then try old IOCTL method.
+ */
+ if (!ret) {
+ /* 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 = 128;
+
+ if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) {
+ error("sif6addr: ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
+ return 0;
+ }
+ }
+
+ if (!ret && !eui64_iszero(his_eui64)) {
+ /*
+ * Linux kernel does not provide AF_INET6 ioctl SIOCSIFDSTADDR for
+ * setting remote peer host address, so set only route to remote host.
+ */
+
+ /* 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 = 128;
+ rt6.rtmsg_ifindex = ifr.ifr_ifindex;
+ rt6.rtmsg_metric = 1;
+
+ if (ioctl(sock6_fd, SIOCADDRT, &rt6) < 0) {
+ error("sif6addr: ioctl(SIOCADDRT): %m (line %d)", __LINE__);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+
+/********************************************************************
+ *
+ * cif6addr - Remove IPv6 address from interface
+ */
+int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
+{
+ struct ifreq ifr;
+ struct in6_ifreq ifr6;
+
+ if (sock6_fd < 0) {
+ errno = -sock6_fd;
+ error("IPv6 socket creation failed: %m");
+ return 0;
+ }
+ memset(&ifr, 0, sizeof(ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+ if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
+ error("cif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ memset(&ifr6, 0, sizeof(ifr6));
+ IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
+ ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+ ifr6.ifr6_prefixlen = 128;
+
+ if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) {
+ if (errno != EADDRNOTAVAIL) {
+ if (! ok_error (errno))
+ error("cif6addr: ioctl(SIOCDIFADDR): %m (line %d)", __LINE__);
+ }
+ else {
+ warn("cif6addr: ioctl(SIOCDIFADDR): No such address");
+ }
+ return (0);
+ }
+ return 1;
+}
+#endif /* PPP_WITH_IPV6CP */
+
+/*
+ * get_pty - get a pty master/slave pair and chown the slave side
+ * to the uid given. Assumes slave_name points to >= 16 bytes of space.
+ */
+int
+get_pty(int *master_fdp, int *slave_fdp, char *slave_name, int uid)
+{
+ int i, mfd, ret, sfd = -1;
+ char pty_name[16];
struct termios tios;
- if (openpty (&master_fd, &slave_fd, loop_name, NULL, NULL) < 0)
- {
- syslog(LOG_ERR, "No free pty for loopback");
- die(1);
- }
- SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
+#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);
+ close(mfd);
+ }
+ }
+ }
+#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) {
+ ret = fchown(sfd, uid, -1);
+ if (ret != 0) {
+ warn("Couldn't change ownership of %s, %m", pty_name);
+ }
+ ret = fchmod(sfd, S_IRUSR | S_IWUSR);
+ if (ret != 0) {
+ warn("Couldn't change permissions of %s, %m", pty_name);
+ }
+ break;
+ }
+ close(mfd);
+ }
+ }
+ }
- set_ppp_fd(slave_fd);
+ if (sfd < 0)
+ return 0;
- if (tcgetattr(ppp_fd, &tios) == 0)
- {
+ strlcpy(slave_name, pty_name, 16);
+ *master_fdp = mfd;
+ *slave_fdp = sfd;
+ if (tcgetattr(sfd, &tios) == 0) {
tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
- tios.c_cflag |= CS8 | CREAD;
- tios.c_iflag = IGNPAR | CLOCAL;
+ tios.c_cflag |= CS8 | CREAD | CLOCAL;
+ tios.c_iflag = IGNPAR;
tios.c_oflag = 0;
tios.c_lflag = 0;
- if (tcsetattr(ppp_fd, TCSAFLUSH, &tios) < 0)
- {
- syslog(LOG_WARNING, "couldn't set attributes on loopback: %m(%d)", errno);
- }
- }
+ 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;
+
+ looped = 1;
+ if (new_style_driver) {
+ /* allocate ourselves a ppp unit */
+ if (make_ppp_unit() < 0)
+ die(1);
+ modify_flags(ppp_dev_fd, 0, SC_LOOP_TRAFFIC);
+ set_kdebugflag(kdebugflag);
+ ppp_fd = -1;
+ return ppp_dev_fd;
+ }
+
+ if (!get_pty(&master_fd, &slave_fd, loop_name, 0))
+ fatal("No free pty for loopback");
+
+ set_ppp_fd(slave_fd);
flags = fcntl(master_fd, F_GETFL);
if (flags == -1 ||
fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
- {
- syslog(LOG_WARNING, "couldn't set master loopback to nonblock: %m(%d)", errno);
- }
+ warn("couldn't set master loopback to nonblock: %m");
flags = fcntl(ppp_fd, F_GETFL);
if (flags == -1 ||
fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
- {
- syslog(LOG_WARNING, "couldn't set slave loopback to nonblock: %m(%d)", errno);
- }
+ warn("couldn't set slave loopback to nonblock: %m");
if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
- {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
- die(1);
- }
+ fatal("ioctl(TIOCSETD): %m (line %d)", __LINE__);
/*
* Find out which interface we were given.
*/
if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
- {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
- die(1);
- }
+ fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__);
/*
* Enable debug in the driver if requested.
*/
set_kdebugflag (kdebugflag);
- }
-
-/********************************************************************
- *
- * restore_loop - reattach the ppp unit to the loopback.
- *
- * The problem with the Linux variant is that the POSIX tty drivers will
- * sieze the line when it is disconnected. In addition, when the device
- * goes down all of the routes are deleted. This means that the tty needs
- * to be re-opened, reconfigured, and the device reconfigured and the routes
- * restored.
- */
-
-void
-restore_loop(void)
- {
- int x;
- int fdflags;
- char fname [30];
-/*
- * Take down the existing interface
- */
- sifdown (0);
- (void) ioctl(ppp_fd, TIOCSETD, &tty_disc);
-/*
- * Find the existing flags. This works even if the tty has stolen the
- * line discipline.
- */
- fdflags = fcntl(ppp_fd, F_GETFL);
- if (fdflags < 0)
- {
- syslog (LOG_ERR, "retrieve file flags failed: %m(%d)", errno);
- fdflags = O_NONBLOCK | O_RDWR;
- }
-/*
- * Re-open the file so the we can re-establish the previous discipline
- */
- sprintf (fname, "/proc/self/fd/%d", ppp_fd);
- x = open (fname, O_RDWR | O_NONBLOCK, 0);
- if (x < 0)
- {
- syslog (LOG_ERR, "reopen of tty file failed: %m(%d)", errno);
- }
-/*
- * Transfer the newly opened file (to the same tty) back to the tty
- * file handle.
- */
- else
- {
- dup2 (x, ppp_fd);
- close (x);
- fcntl (ppp_fd, F_SETFL, fdflags);
- set_up_tty(ppp_fd, 0);
- }
-/*
- * Switch to the tty slave and put that into the PPP discipline.
- */
- set_ppp_fd(slave_fd);
- if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
- {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m(%d)", errno);
- die(1);
- }
-/*
- * Fetch the current unit identifier.
- */
- if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
- {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m(%d)", errno);
- die(1);
- }
-/*
- * Restore the parameters for the PPP link.
- */
- ppp_send_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
- ppp_recv_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
-/*
- * Reconfigure the IP addresses for the demand dial system.
- */
- ip_demand_conf (0);
- }
+ return master_fd;
+}
/********************************************************************
*
*/
int
-sifnpmode(u, proto, mode)
- int u;
- int proto;
- enum NPmode mode;
+sifnpmode(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 (ioctl(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
if (! ok_error (errno))
- {
- syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE, %d, %d): %m(%d)",
- proto, mode, errno);
- }
+ error("ioctl(PPPIOCSNPMODE, %d, %d): %m", proto, mode);
return 0;
- }
+ }
return 1;
- }
-
-\f
-#include <linux/ipx.h>
+}
-/********************************************************************
- *
- * sipxfaddr - Config the interface IPX networknumber
+/*
+ * Use the hostname as part of the random number seed.
*/
+int
+get_host_seed(void)
+{
+ int h;
+ char *p = hostname;
-int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
- {
- int skfd;
- int result = 1;
- struct sockaddr_ipx ipx_addr;
- struct ifreq ifr;
- struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
-
-#ifdef IPX_CHANGE
- skfd = socket (AF_IPX, SOCK_DGRAM, 0);
- if (skfd < 0)
- {
- if (! ok_error (errno))
- {
- syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
- }
- result = 0;
- }
- else
- {
- memset (&ifr, '\0', sizeof (ifr));
- strcpy (ifr.ifr_name, ifname);
-
- 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))
- {
- syslog (LOG_DEBUG,
- "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
- }
- }
- else
- {
- syslog (LOG_WARNING,
- "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
- }
- }
- close (skfd);
- }
-#endif
- return result;
- }
+ h = 407;
+ for (p = hostname; *p != 0; ++p)
+ h = h * 37 + *p;
+ return h;
+}
/********************************************************************
*
- * cipxfaddr - Clear the information for the IPX network. The IPX routes
- * are removed and the device is no longer able to pass IPX
- * frames.
+ * sys_check_options - check the options that the user specified
*/
-int cipxfaddr (int unit)
- {
- int skfd;
- int result = 1;
- struct sockaddr_ipx ipx_addr;
- struct ifreq ifr;
- struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
-
-#ifdef IPX_CHANGE
- skfd = socket (AF_IPX, SOCK_DGRAM, 0);
- if (skfd < 0)
- {
- if (! ok_error (errno))
- {
- syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
- }
- result = 0;
- }
- else
- {
- memset (&ifr, '\0', sizeof (ifr));
- strcpy (ifr.ifr_name, ifname);
-
- 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))
- {
- syslog (LOG_INFO,
- "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
- }
- result = 0;
- }
- close (skfd);
- }
-#endif
- return result;
- }
+int
+sys_check_options(void)
+{
+ 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;
+}
/********************************************************************
*
- * sys_check_options - check the options that the user specified
+ * get_time - Get current time, monotonic if possible.
*/
-
-void
-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())
- {
- strcat (route_buffer, "/net/ipx_interface");
- if (lstat (route_buffer, &stat_buf) >= 0)
- {
- break;
- }
- }
- syslog (LOG_ERR, "IPX support is not present in the kernel\n");
- ipxcp_protent.enabled_flag = 0;
- ipcp_protent.enabled_flag = 1;
- break;
- }
+int
+get_time(struct timeval *tv)
+{
+/* Old glibc (< 2.3.4) does define CLOCK_MONOTONIC, but kernel may have it.
+ * Runtime checking makes it safe. */
+#ifndef CLOCK_MONOTONIC
+#define CLOCK_MONOTONIC 1
#endif
- }
+ static int monotonic = -1;
+ struct timespec ts;
+ int ret;
+
+ if (monotonic) {
+ ret = clock_gettime(CLOCK_MONOTONIC, &ts);
+ if (ret == 0) {
+ monotonic = 1;
+ if (tv) {
+ tv->tv_sec = ts.tv_sec;
+ tv->tv_usec = ts.tv_nsec / 1000;
+ }
+ return ret;
+ } else if (monotonic > 0)
+ return ret;
+
+ monotonic = 0;
+ warn("Couldn't use monotonic clock source: %m");
+ }
+
+ return gettimeofday(tv, NULL);
+}