* 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 <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 <termios.h>
#include <unistd.h>
/* This is in netdevice.h. However, this compile will fail miserably if
#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>
+#ifdef INET6
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#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
+#endif
+
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
#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 INET6
#ifndef _LINUX_IN6_H
/*
#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]); \
+ 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;
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 */
if (x == 0 && req_ifname[0] != '\0') {
struct ifreq ifr;
- char t[MAXIFNAMELEN];
+ char t[IFNAMSIZ];
memset(&ifr, 0, sizeof(struct ifreq));
slprintf(t, sizeof(t), "%s%d", PPP_DRV_NAME, ifunit);
- strlcpy(ifr.ifr_name, t, IF_NAMESIZE);
- strlcpy(ifr.ifr_newname, req_ifname, IF_NAMESIZE);
+ 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);
#ifdef B460800
{ 460800, B460800 },
#endif
+#ifdef B500000
+ { 500000, B500000 },
+#endif
+#ifdef B576000
+ { 576000, B576000 },
+#endif
#ifdef B921600
{ 921600, B921600 },
#endif
if (bps == speedp->speed_int)
return speedp->speed_val;
}
- warn("speed %d not supported", bps);
}
return 0;
}
if (stop_bits >= 2)
tios.c_cflag |= CSTOPB;
- speed = translate_speed(inspeed);
- if (speed) {
- cfsetospeed (&tios, speed);
- cfsetispeed (&tios, speed);
+ 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)
+ 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__);
-
- baud_rate = baud_rate_of(speed);
restore_term = 1;
}
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);
/********************************************************************
*
* 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 ouraddr, u_int32_t gateway)
+int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
{
- struct rtentry rt;
+ struct rtentry rt, tmp_rt;
+ struct rtentry *del_rt = NULL;
- if (defaultroute_exists(&rt, dfl_route_metric) && strcmp(rt.rt_dev, ifname) != 0) {
- if (rt.rt_flags & RTF_GATEWAY)
- error("not replacing existing default route via %I with metric %d",
- SIN_ADDR(rt.rt_gateway), dfl_route_metric);
- else
- error("not replacing existing default route through %s with metric %d",
- rt.rt_dev, dfl_route_metric);
- return 0;
+ 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;
+ }
+ }
}
memset (&rt, 0, sizeof (rt));
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;
+ }
have_default_route = 1;
return 1;
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;
}
}
/*
- * get_first_ethernet - return the name of the first ethernet-style
- * interface on this system.
+ * get_first_ether_hwaddr - get the hardware address for the first
+ * ethernet-style interface on this system.
*/
-static char first_ether_name[IF_NAMESIZE];
-char *
-get_first_ethernet(void)
+int
+get_first_ether_hwaddr(u_char *addr)
{
struct if_nameindex *if_ni, *i;
struct ifreq ifreq;
sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (sock_fd < 0)
- return NULL;
+ return -1;
if_ni = if_nameindex();
if (!if_ni) {
close(sock_fd);
- return NULL;
+ return -1;
}
- first_ether_name[0] = 0;
+ 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) {
- strlcpy(first_ether_name, i->if_name, sizeof(first_ether_name));
+ memcpy(addr, ifreq.ifr_hwaddr.sa_data, 6);
break;
}
+ ret = -1;
}
if_freenameindex(if_ni);
close(sock_fd);
- if (!first_ether_name[0])
- return NULL;
-
- return first_ether_name;
+ return ret;
}
/********************************************************************
}
#ifdef INET6
+/********************************************************************
+ *
+ * sif6addr_rtnetlink - Config the interface with both IPv6 link-local addresses via rtnetlink
+ */
+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;
+ struct {
+ struct nlmsghdr nlh;
+ struct nlmsgerr nlerr;
+ } nlresp;
+ struct sockaddr_nl nladdr;
+ struct iovec iov;
+ struct msghdr msg;
+ ssize_t nlresplen;
+ int one;
+ int fd;
+
+ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (fd < 0) {
+ error("sif6addr_rtnetlink: socket(NETLINK_ROUTE): %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ /*
+ * 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("sif6addr_rtnetlink: bind(AF_NETLINK): %m (line %d)", __LINE__);
+ close(fd);
+ return 0;
+ }
+
+ 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;
+ IN6_LLADDR_FROM_EUI64(nlreq.addrs[1].addr, his_eui64);
+
+ memset(&nladdr, 0, sizeof(nladdr));
+ nladdr.nl_family = AF_NETLINK;
+
+ memset(&iov, 0, sizeof(iov));
+ iov.iov_base = &nlreq;
+ iov.iov_len = sizeof(nlreq);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = &nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ if (sendmsg(fd, &msg, 0) < 0) {
+ error("sif6addr_rtnetlink: sendmsg(RTM_NEWADDR/NLM_F_CREATE): %m (line %d)", __LINE__);
+ close(fd);
+ return 0;
+ }
+
+ memset(&iov, 0, sizeof(iov));
+ iov.iov_base = &nlresp;
+ iov.iov_len = sizeof(nlresp);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = &nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ nlresplen = recvmsg(fd, &msg, 0);
+
+ if (nlresplen < 0) {
+ error("sif6addr_rtnetlink: recvmsg(NLM_F_ACK): %m (line %d)", __LINE__);
+ close(fd);
+ return 0;
+ }
+
+ close(fd);
+
+ if (nladdr.nl_family != AF_NETLINK) {
+ error("sif6addr_rtnetlink: recvmsg(NLM_F_ACK): Not a netlink packet (line %d)", __LINE__);
+ return 0;
+ }
+
+ if ((size_t)nlresplen != sizeof(nlresp) || nlresp.nlh.nlmsg_len < sizeof(nlresp)) {
+ error("sif6addr_rtnetlink: recvmsg(NLM_F_ACK): Acknowledgment netlink packet too short (line %d)", __LINE__);
+ return 0;
+ }
+
+ /* acknowledgment packet for NLM_F_ACK is NLMSG_ERROR */
+ if (nlresp.nlh.nlmsg_type != NLMSG_ERROR) {
+ error("sif6addr_rtnetlink: recvmsg(NLM_F_ACK): Not an acknowledgment netlink packet (line %d)", __LINE__);
+ return 0;
+ }
+
+ /* error == 0 indicates success, negative value is errno code */
+ if (nlresp.nlerr.error != 0) {
+ /*
+ * 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.
+ */
+ if (kernel_version >= KVERSION(3,11,0))
+ error("sif6addr_rtnetlink: %s (line %d)", strerror(-nlresp.nlerr.error), __LINE__);
+ return 0;
+ }
+
+ return 1;
+}
+
/********************************************************************
*
* sif6addr - Config the interface with an IPv6 link-local address
struct in6_ifreq ifr6;
struct ifreq ifr;
struct in6_rtmsg rt6;
+ int ret;
if (sock6_fd < 0) {
errno = -sock6_fd;
return 0;
}
- /* Local interface */
- memset(&ifr6, 0, sizeof(ifr6));
- IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
- ifr6.ifr6_ifindex = ifr.ifr_ifindex;
- ifr6.ifr6_prefixlen = 128;
-
- if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) {
- error("sif6addr: ioctl(SIOCSIFADDR): %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;
}
- /* 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;
+ /*
+ * 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;
+ }
+
+ /*
+ * 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;
return 1;
}
-#ifdef INET6
-/*
- * ether_to_eui64 - Convert 48-bit Ethernet address into 64-bit EUI
- *
- * convert the 48-bit MAC address of eth0 into EUI 64. caller also assumes
- * that the system has a properly configured Ethernet interface for this
- * function to return non-zero.
- */
-int
-ether_to_eui64(eui64_t *p_eui64)
-{
- struct ifreq ifr;
- int skfd;
- const unsigned char *ptr;
-
- skfd = socket(PF_INET6, SOCK_DGRAM, 0);
- if(skfd == -1)
- {
- warn("could not open IPv6 socket");
- return 0;
- }
-
- strcpy(ifr.ifr_name, "eth0");
- if(ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
- {
- close(skfd);
- warn("could not obtain hardware address for eth0");
- return 0;
- }
- close(skfd);
-
- /*
- * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1]
- */
- ptr = (unsigned char *) ifr.ifr_hwaddr.sa_data;
- p_eui64->e8[0] = ptr[0] | 0x02;
- p_eui64->e8[1] = ptr[1];
- p_eui64->e8[2] = ptr[2];
- p_eui64->e8[3] = 0xFF;
- p_eui64->e8[4] = 0xFE;
- p_eui64->e8[5] = ptr[3];
- p_eui64->e8[6] = ptr[4];
- p_eui64->e8[7] = ptr[5];
-
- return 1;
-}
-#endif
-
/********************************************************************
*
* get_time - Get current time, monotonic if possible.
projects / ppp.git / blobdiff