--- a/Makefile
+++ b/Makefile
@@ -62,8 +62,8 @@ OSFLAGS?= -DLINUX -I$(KERNELSRC)/include
# are packages seperately (eg kernel-headers on Fedora)
# Note: 2.6.23+ support still needs some changes in the xl2tpd source
#
-#OSFLAGS+= -DUSE_KERNEL
-#
+# Kernel mode fixed by sigwall <fionov@gmail.com>
+OSFLAGS+= -DUSE_KERNEL
#
# Uncomment the next line for FreeBSD
#
--- a/call.c
+++ b/call.c
@@ -680,6 +680,8 @@ struct call *get_call (int tunnel, int c
st->peer.sin_port = port;
st->refme = refme;
st->refhim = refhim;
+ st->udp_fd = -1;
+ st->pppox_fd = -1;
bcopy (&addr, &st->peer.sin_addr, sizeof (addr));
st->next = tunnels.head;
tunnels.head = st;
--- a/control.c
+++ b/control.c
@@ -596,6 +596,9 @@ int control_finish (struct tunnel *t, st
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: sending SCCCN\n", __FUNCTION__);
control_xmit (buf);
+
+ connect_pppol2tp(t);
+
/* Schedule a HELLO */
tv.tv_sec = HELLO_DELAY;
tv.tv_usec = 0;
@@ -608,6 +611,7 @@ int control_finish (struct tunnel *t, st
"Connection established to %s, %d. Local: %d, Remote: %d (ref=%u/%u).\n",
IPADDY (t->peer.sin_addr),
ntohs (t->peer.sin_port), t->ourtid, t->tid, t->refme, t->refhim);
+
if (t->lac)
{
/* This is part of a LAC, so we want to go ahead
@@ -635,6 +639,9 @@ int control_finish (struct tunnel *t, st
IPADDY (t->peer.sin_addr),
ntohs (t->peer.sin_port), t->ourtid, t->tid, t->refme, t->refhim,
t->lns->entname);
+
+ connect_pppol2tp(t);
+
/* Schedule a HELLO */
tv.tv_sec = HELLO_DELAY;
tv.tv_usec = 0;
--- a/l2tp.h
+++ b/l2tp.h
@@ -167,6 +167,8 @@ struct tunnel
int ourrws; /* Receive Window Size */
int rxspeed; /* Receive bps */
int txspeed; /* Transmit bps */
+ int udp_fd; /* UDP fd */
+ int pppox_fd; /* PPPOX tunnel fd */
struct call *self;
struct lns *lns; /* LNS that owns us */
struct lac *lac; /* LAC that owns us */
@@ -220,6 +222,7 @@ extern void control_xmit (void *);
extern int ppd;
extern int switch_io; /* jz */
extern int control_fd;
+extern int connect_pppol2tp(struct tunnel *t);
extern int start_pppd (struct call *c, struct ppp_opts *);
extern void magic_lac_dial (void *);
extern int get_entropy (unsigned char *, int);
--- a/linux/include/linux/if_pppol2tp.h
+++ b/linux/include/linux/if_pppol2tp.h
@@ -2,7 +2,7 @@
* Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
*
* This file supplies definitions required by the PPP over L2TP driver
- * (pppol2tp.c). All version information wrt this file is located in pppol2tp.c
+ * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
*
* License:
* This program is free software; you can redistribute it and/or
@@ -15,18 +15,13 @@
#ifndef __LINUX_IF_PPPOL2TP_H
#define __LINUX_IF_PPPOL2TP_H
-#include <asm/types.h>
-
-#ifdef __KERNEL__
-#include <linux/in.h>
-#endif
+#include <linux/types.h>
/* Structure used to connect() the socket to a particular tunnel UDP
- * socket.
+ * socket over IPv4.
*/
-struct pppol2tp_addr
-{
- pid_t pid; /* pid that owns the fd.
+struct pppol2tp_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
* 0 => current */
int fd; /* FD of UDP socket to use */
@@ -36,6 +31,45 @@ struct pppol2tp_addr
__u16 d_tunnel, d_session; /* For sending outgoing packets */
};
+/* Structure used to connect() the socket to a particular tunnel UDP
+ * socket over IPv6.
+ */
+struct pppol2tpin6_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP socket to use */
+
+ __u16 s_tunnel, s_session; /* For matching incoming packets */
+ __u16 d_tunnel, d_session; /* For sending outgoing packets */
+
+ struct sockaddr_in6 addr; /* IP address and port to send to */
+};
+
+/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
+ * bits. So we need a different sockaddr structure.
+ */
+struct pppol2tpv3_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP or IP socket to use */
+
+ struct sockaddr_in addr; /* IP address and port to send to */
+
+ __u32 s_tunnel, s_session; /* For matching incoming packets */
+ __u32 d_tunnel, d_session; /* For sending outgoing packets */
+};
+
+struct pppol2tpv3in6_addr {
+ __kernel_pid_t pid; /* pid that owns the fd.
+ * 0 => current */
+ int fd; /* FD of UDP or IP socket to use */
+
+ __u32 s_tunnel, s_session; /* For matching incoming packets */
+ __u32 d_tunnel, d_session; /* For sending outgoing packets */
+
+ struct sockaddr_in6 addr; /* IP address and port to send to */
+};
+
/* Socket options:
* DEBUG - bitmask of debug message categories
* SENDSEQ - 0 => don't send packets with sequence numbers
@@ -66,4 +100,4 @@ enum {
-#endif
+#endif /* __LINUX_IF_PPPOL2TP_H */
--- a/network.c
+++ b/network.c
@@ -45,6 +45,7 @@ int init_network (void)
server.sin_family = AF_INET;
server.sin_addr.s_addr = gconfig.listenaddr;
server.sin_port = htons (gconfig.port);
+ int flags;
if ((server_socket = socket (PF_INET, SOCK_DGRAM, 0)) < 0)
{
l2tp_log (LOG_CRIT, "%s: Unable to allocate socket. Terminating.\n",
@@ -52,6 +53,10 @@ int init_network (void)
return -EINVAL;
};
+ flags = 1;
+ setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags));
+ setsockopt(server_socket, SOL_SOCKET, SO_NO_CHECK, &flags, sizeof(flags));
+
if (bind (server_socket, (struct sockaddr *) &server, sizeof (server)))
{
close (server_socket);
@@ -321,6 +326,11 @@ int build_fdset (fd_set *readfds)
while (tun)
{
+ if (tun->udp_fd > -1) {
+ if (tun->udp_fd > max)
+ max = tun->udp_fd;
+ FD_SET (tun->udp_fd, readfds);
+ }
call = tun->call_head;
while (call)
{
@@ -390,6 +400,8 @@ void network_thread ()
struct iovec iov;
char cbuf[256];
unsigned int refme, refhim;
+ int * currentfd;
+ int server_socket_processed;
/* This one buffer can be recycled for everything except control packets */
buf = new_buf (MAX_RECV_SIZE);
@@ -428,7 +440,21 @@ void network_thread ()
{
do_control ();
}
- if (FD_ISSET (server_socket, &readfds))
+ server_socket_processed = 0;
+ currentfd = NULL;
+ st = tunnels.head;
+ while (st || !server_socket_processed) {
+ if (st && (st->udp_fd == -1)) {
+ st=st->next;
+ continue;
+ }
+ if (st) {
+ currentfd = &st->udp_fd;
+ } else {
+ currentfd = &server_socket;
+ server_socket_processed = 1;
+ }
+ if (FD_ISSET (*currentfd, &readfds))
{
/*
* Okay, now we're ready for reading and processing new data.
@@ -457,12 +483,19 @@ void network_thread ()
msgh.msg_flags = 0;
/* Receive one packet. */
- recvsize = recvmsg(server_socket, &msgh, 0);
+ recvsize = recvmsg(*currentfd, &msgh, 0);
if (recvsize < MIN_PAYLOAD_HDR_LEN)
{
if (recvsize < 0)
{
+ if (errno == ECONNREFUSED) {
+ close(*currentfd);
+ }
+ if ((errno == ECONNREFUSED) ||
+ (errno == EBADF)) {
+ *currentfd = -1;
+ }
if (errno != EAGAIN)
l2tp_log (LOG_WARNING,
"%s: recvfrom returned error %d (%s)\n",
@@ -567,6 +600,8 @@ void network_thread ()
}
};
}
+ if (st) st=st->next;
+ }
/*
* finished obvious sources, look for data from PPP connections.
@@ -639,3 +674,82 @@ void network_thread ()
}
}
+
+int connect_pppol2tp(struct tunnel *t) {
+#ifdef USE_KERNEL
+ if (kernel_support) {
+ int ufd = -1, fd2 = -1;
+ int flags;
+ struct sockaddr_pppol2tp sax;
+
+ struct sockaddr_in server;
+ server.sin_family = AF_INET;
+ server.sin_addr.s_addr = gconfig.listenaddr;
+ server.sin_port = htons (gconfig.port);
+ if ((ufd = socket (PF_INET, SOCK_DGRAM, 0)) < 0)
+ {
+ l2tp_log (LOG_CRIT, "%s: Unable to allocate UDP socket. Terminating.\n",
+ __FUNCTION__);
+ return -EINVAL;
+ };
+
+ flags=1;
+ setsockopt(ufd, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags));
+ setsockopt(ufd, SOL_SOCKET, SO_NO_CHECK, &flags, sizeof(flags));
+
+ if (bind (ufd, (struct sockaddr *) &server, sizeof (server)))
+ {
+ close (ufd);
+ l2tp_log (LOG_CRIT, "%s: Unable to bind UDP socket: %s. Terminating.\n",
+ __FUNCTION__, strerror(errno), errno);
+ return -EINVAL;
+ };
+ server = t->peer;
+ flags = fcntl(ufd, F_GETFL);
+ if (flags == -1 || fcntl(ufd, F_SETFL, flags | O_NONBLOCK) == -1) {
+ l2tp_log (LOG_WARNING, "%s: Unable to set UDP socket nonblock.\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+ if (connect (ufd, (struct sockaddr *) &server, sizeof(server)) < 0) {
+ l2tp_log (LOG_CRIT, "%s: Unable to connect UDP peer. Terminating.\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+
+ t->udp_fd=ufd;
+
+ fd2 = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP);
+ if (fd2 < 0) {
+ l2tp_log (LOG_WARNING, "%s: Unable to allocate PPPoL2TP socket.\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+ flags = fcntl(fd2, F_GETFL);
+ if (flags == -1 || fcntl(fd2, F_SETFL, flags | O_NONBLOCK) == -1) {
+ l2tp_log (LOG_WARNING, "%s: Unable to set PPPoL2TP socket nonblock.\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+ sax.sa_family = AF_PPPOX;
+ sax.sa_protocol = PX_PROTO_OL2TP;
+ sax.pppol2tp.pid = 0;
+ sax.pppol2tp.fd = t->udp_fd;
+ sax.pppol2tp.addr.sin_addr.s_addr = t->peer.sin_addr.s_addr;
+ sax.pppol2tp.addr.sin_port = t->peer.sin_port;
+ sax.pppol2tp.addr.sin_family = AF_INET;
+ sax.pppol2tp.s_tunnel = t->ourtid;
+ sax.pppol2tp.s_session = 0;
+ sax.pppol2tp.d_tunnel = t->tid;
+ sax.pppol2tp.d_session = 0;
+ if ((connect(fd2, (struct sockaddr *)&sax, sizeof(sax))) < 0) {
+ l2tp_log (LOG_WARNING, "%s: Unable to connect PPPoL2TP socket. %d %s\n",
+ __FUNCTION__, errno, strerror(errno));
+ close(fd2);
+ return -EINVAL;
+ }
+ t->pppox_fd = fd2;
+ }
+#endif
+ return 0;
+}
--- a/xl2tpd.c
+++ b/xl2tpd.c
@@ -278,7 +278,11 @@ void death_handler (int signal)
struct tunnel *st, *st2;
int sec;
l2tp_log (LOG_CRIT, "%s: Fatal signal %d received\n", __FUNCTION__, signal);
+#ifdef USE_KERNEL
+ if (kernel_support || signal != SIGTERM) {
+#else
if (signal != SIGTERM) {
+#endif
st = tunnels.head;
while (st)
{
@@ -349,7 +353,7 @@ int start_pppd (struct call *c, struct p
int flags;
#endif
int pos = 1;
- int fd2;
+ int fd2 = -1;
#ifdef DEBUG_PPPD
int x;
#endif
@@ -397,7 +401,7 @@ int start_pppd (struct call *c, struct p
sax.sa_family = AF_PPPOX;
sax.sa_protocol = PX_PROTO_OL2TP;
sax.pppol2tp.pid = 0;
- sax.pppol2tp.fd = server_socket;
+ sax.pppol2tp.fd = c->container->udp_fd;
sax.pppol2tp.addr.sin_addr.s_addr = c->container->peer.sin_addr.s_addr;
sax.pppol2tp.addr.sin_port = c->container->peer.sin_port;
sax.pppol2tp.addr.sin_family = AF_INET;
@@ -408,6 +412,7 @@ int start_pppd (struct call *c, struct p
if (connect(fd2, (struct sockaddr *)&sax, sizeof(sax)) < 0) {
l2tp_log (LOG_WARNING, "%s: Unable to connect PPPoL2TP socket.\n",
__FUNCTION__);
+ close(fd2);
return -EINVAL;
}
stropt[pos++] = strdup ("plugin");
@@ -484,7 +489,7 @@ int start_pppd (struct call *c, struct p
dup2 (fd2, 0);
dup2 (fd2, 1);
close(fd2);
-
+ }
/* close all the calls pty fds */
st = tunnels.head;
while (st)
@@ -492,12 +497,17 @@ int start_pppd (struct call *c, struct p
sc = st->call_head;
while (sc)
{
- close (sc->fd);
+#ifdef USE_KERNEL
+ if (kernel_support) {
+ close(st->udp_fd); /* tunnel UDP fd */
+ close(st->pppox_fd); /* tunnel PPPoX fd */
+ } else
+#endif
+ close (sc->fd); /* call pty fd */
sc = sc->next;
}
st = st->next;
}
- }
/* close the UDP socket fd */
close (server_socket);
@@ -615,6 +625,10 @@ void destroy_tunnel (struct tunnel *t)
the memory pointed to by t->chal_us.vector at some other place */
if (t->chal_them.vector)
free (t->chal_them.vector);
+ if (t->pppox_fd > -1 )
+ close (t->pppox_fd);
+ if (t->udp_fd > -1 )
+ close (t->udp_fd);
free (t);
free (me);
}