- Added support for CONFIG_PPPOL2TP by sigwall <fionov@gmail.com> - Require current ppp because some old versions lacked pppol2tp.so pluginepel9
Paul Wouters
13 years ago
parent
bd5a80d261
commit
8ecc1e5656
@ -0,0 +1,436 @@
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diff --git a/Makefile b/Makefile
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index 6f6481f..778f38d 100644
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--- a/Makefile
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+++ b/Makefile
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@@ -62,8 +62,8 @@
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# are packages seperately (eg kernel-headers on Fedora)
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# Note: 2.6.23+ support still needs some changes in the xl2tpd source
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#
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-#OSFLAGS+= -DUSE_KERNEL
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-#
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+# Kernel mode fixed by sigwall <fionov@gmail.com>
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+OSFLAGS+= -DUSE_KERNEL
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#
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# Uncomment the next line for FreeBSD
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#
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diff --git a/call.c b/call.c
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index d1b1858..b672f91 100644
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--- a/call.c
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+++ b/call.c
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@@ -680,6 +680,8 @@ struct call *get_call (int tunnel, int call, struct in_addr addr, int port,
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st->peer.sin_port = port;
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st->refme = refme;
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st->refhim = refhim;
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+ st->udp_fd = -1;
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+ st->pppox_fd = -1;
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bcopy (&addr, &st->peer.sin_addr, sizeof (addr));
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st->next = tunnels.head;
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tunnels.head = st;
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diff --git a/control.c b/control.c
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index 0892df9..9362ffd 100644
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--- a/control.c
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+++ b/control.c
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@@ -596,6 +596,9 @@ int control_finish (struct tunnel *t, struct call *c)
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if (gconfig.debug_state)
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l2tp_log (LOG_DEBUG, "%s: sending SCCCN\n", __FUNCTION__);
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control_xmit (buf);
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+
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+ connect_pppol2tp(t);
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+
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/* Schedule a HELLO */
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tv.tv_sec = HELLO_DELAY;
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tv.tv_usec = 0;
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@@ -608,6 +611,7 @@ int control_finish (struct tunnel *t, struct call *c)
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"Connection established to %s, %d. Local: %d, Remote: %d (ref=%u/%u).\n",
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IPADDY (t->peer.sin_addr),
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ntohs (t->peer.sin_port), t->ourtid, t->tid, t->refme, t->refhim);
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+
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if (t->lac)
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{
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/* This is part of a LAC, so we want to go ahead
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@@ -635,6 +639,9 @@ int control_finish (struct tunnel *t, struct call *c)
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IPADDY (t->peer.sin_addr),
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ntohs (t->peer.sin_port), t->ourtid, t->tid, t->refme, t->refhim,
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t->lns->entname);
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+
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+ connect_pppol2tp(t);
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+
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/* Schedule a HELLO */
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tv.tv_sec = HELLO_DELAY;
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tv.tv_usec = 0;
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diff --git a/l2tp.h b/l2tp.h
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index 2724fff..856423f 100644
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--- a/l2tp.h
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+++ b/l2tp.h
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@@ -167,6 +167,8 @@ struct tunnel
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int ourrws; /* Receive Window Size */
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int rxspeed; /* Receive bps */
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int txspeed; /* Transmit bps */
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+ int udp_fd; /* UDP fd */
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+ int pppox_fd; /* PPPOX tunnel fd */
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struct call *self;
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struct lns *lns; /* LNS that owns us */
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struct lac *lac; /* LAC that owns us */
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@@ -220,6 +222,7 @@ extern void control_xmit (void *);
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extern int ppd;
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extern int switch_io; /* jz */
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extern int control_fd;
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+extern int connect_pppol2tp(struct tunnel *t);
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extern int start_pppd (struct call *c, struct ppp_opts *);
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extern void magic_lac_dial (void *);
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extern int get_entropy (unsigned char *, int);
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diff --git a/linux/include/linux/if_pppol2tp.h b/linux/include/linux/if_pppol2tp.h
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index a7d6a22..0795e4a 100644
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--- a/linux/include/linux/if_pppol2tp.h
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+++ b/linux/include/linux/if_pppol2tp.h
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@@ -36,6 +36,20 @@ struct pppol2tp_addr
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__u16 d_tunnel, d_session; /* For sending outgoing packets */
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};
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+/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
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+ * bits. So we need a different sockaddr structure.
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+ */
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+struct pppol2tpv3_addr {
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+ pid_t pid; /* pid that owns the fd.
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+ * 0 => current */
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+ int fd; /* FD of UDP or IP socket to use */
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+
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+ struct sockaddr_in addr; /* IP address and port to send to */
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+
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+ __u32 s_tunnel, s_session; /* For matching incoming packets */
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+ __u32 d_tunnel, d_session; /* For sending outgoing packets */
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+};
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+
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/* Socket options:
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* DEBUG - bitmask of debug message categories
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* SENDSEQ - 0 => don't send packets with sequence numbers
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diff --git a/network.c b/network.c
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index 241bd82..fde250e 100644
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--- a/network.c
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+++ b/network.c
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@@ -22,6 +22,7 @@
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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+#include <sys/wait.h>
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#ifndef LINUX
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# include <sys/uio.h>
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#endif
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@@ -36,6 +37,51 @@ int server_socket; /* Server socket */
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int kernel_support; /* Kernel Support there or not? */
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#endif
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+#ifdef USE_KERNEL
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+void modprobe() {
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+ char * modules[] = { "l2tp_ppp", "pppol2tp", NULL };
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+ char ** module;
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+ char buf[256], *tok;
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+ int pid, exit_status, fd;
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+
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+ FILE * fmod = fopen("/proc/modules", "r");
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+
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+ if (fmod == NULL)
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+ return;
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+
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+ while (fgets(buf, 255, fmod) != NULL) {
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+ if ((tok = strtok(buf, " ")) != NULL) {
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+ for (module = modules; *module != NULL; ++module) {
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+ if (!strcmp(*module, tok)) {
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+ fclose(fmod);
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+ return;
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+ }
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+ }
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+ }
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+ }
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+
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+ fclose(fmod);
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+
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+ for (module = modules; *module != NULL; ++module) {
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+ if ((pid = fork()) >= 0) {
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+ if (pid == 0) {
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+ setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
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+ if ((fd = open("/dev/null", O_RDWR)) > -1) {
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+ dup2(fd, 1);
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+ dup2(fd, 2);
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+ }
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+ execlp("modprobe", "modprobe", "-q", *module, (char *)NULL);
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+ exit(1);
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+ } else {
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+ if ((pid = waitpid(pid, &exit_status, 0)) != -1 && WIFEXITED(exit_status)) {
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+ if (WEXITSTATUS(exit_status) == 0)
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+ return;
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+ }
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+ }
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+ }
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+ }
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+}
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+#endif
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int init_network (void)
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{
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@@ -45,6 +91,7 @@ int init_network (void)
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server.sin_family = AF_INET;
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server.sin_addr.s_addr = gconfig.listenaddr;
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server.sin_port = htons (gconfig.port);
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+ int flags;
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if ((server_socket = socket (PF_INET, SOCK_DGRAM, 0)) < 0)
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{
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l2tp_log (LOG_CRIT, "%s: Unable to allocate socket. Terminating.\n",
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@@ -52,6 +99,10 @@ int init_network (void)
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return -EINVAL;
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};
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+ flags = 1;
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+ setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags));
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+ setsockopt(server_socket, SOL_SOCKET, SO_NO_CHECK, &flags, sizeof(flags));
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+
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if (bind (server_socket, (struct sockaddr *) &server, sizeof (server)))
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{
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close (server_socket);
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@@ -91,6 +142,7 @@ int init_network (void)
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}
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else
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{
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+ modprobe();
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int kernel_fd = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP);
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if (kernel_fd < 0)
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{
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@@ -321,6 +373,11 @@ int build_fdset (fd_set *readfds)
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while (tun)
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{
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+ if (tun->udp_fd > -1) {
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+ if (tun->udp_fd > max)
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+ max = tun->udp_fd;
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+ FD_SET (tun->udp_fd, readfds);
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+ }
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call = tun->call_head;
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while (call)
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{
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@@ -390,6 +447,8 @@ void network_thread ()
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struct iovec iov;
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char cbuf[256];
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unsigned int refme, refhim;
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+ int * currentfd;
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+ int server_socket_processed;
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/* This one buffer can be recycled for everything except control packets */
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buf = new_buf (MAX_RECV_SIZE);
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@@ -428,7 +487,21 @@ void network_thread ()
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{
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do_control ();
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}
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- if (FD_ISSET (server_socket, &readfds))
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+ server_socket_processed = 0;
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+ currentfd = NULL;
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+ st = tunnels.head;
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+ while (st || !server_socket_processed) {
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+ if (st && (st->udp_fd == -1)) {
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+ st=st->next;
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+ continue;
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+ }
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+ if (st) {
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+ currentfd = &st->udp_fd;
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+ } else {
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+ currentfd = &server_socket;
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+ server_socket_processed = 1;
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+ }
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+ if (FD_ISSET (*currentfd, &readfds))
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{
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/*
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* Okay, now we're ready for reading and processing new data.
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@@ -457,12 +530,19 @@ void network_thread ()
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msgh.msg_flags = 0;
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/* Receive one packet. */
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- recvsize = recvmsg(server_socket, &msgh, 0);
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+ recvsize = recvmsg(*currentfd, &msgh, 0);
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if (recvsize < MIN_PAYLOAD_HDR_LEN)
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{
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if (recvsize < 0)
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{
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+ if (errno == ECONNREFUSED) {
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+ close(*currentfd);
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+ }
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+ if ((errno == ECONNREFUSED) ||
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+ (errno == EBADF)) {
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+ *currentfd = -1;
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+ }
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if (errno != EAGAIN)
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l2tp_log (LOG_WARNING,
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"%s: recvfrom returned error %d (%s)\n",
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@@ -567,6 +647,8 @@ void network_thread ()
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}
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};
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}
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+ if (st) st=st->next;
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+ }
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/*
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* finished obvious sources, look for data from PPP connections.
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@@ -639,3 +721,82 @@ void network_thread ()
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}
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}
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+
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+int connect_pppol2tp(struct tunnel *t) {
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+#ifdef USE_KERNEL
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+ if (kernel_support) {
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+ int ufd = -1, fd2 = -1;
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+ int flags;
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+ struct sockaddr_pppol2tp sax;
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+
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+ struct sockaddr_in server;
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+ server.sin_family = AF_INET;
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+ server.sin_addr.s_addr = gconfig.listenaddr;
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+ server.sin_port = htons (gconfig.port);
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+ if ((ufd = socket (PF_INET, SOCK_DGRAM, 0)) < 0)
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+ {
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+ l2tp_log (LOG_CRIT, "%s: Unable to allocate UDP socket. Terminating.\n",
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+ __FUNCTION__);
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+ return -EINVAL;
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+ };
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+
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+ flags=1;
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+ setsockopt(ufd, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags));
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+ setsockopt(ufd, SOL_SOCKET, SO_NO_CHECK, &flags, sizeof(flags));
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+
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+ if (bind (ufd, (struct sockaddr *) &server, sizeof (server)))
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+ {
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+ close (ufd);
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+ l2tp_log (LOG_CRIT, "%s: Unable to bind UDP socket: %s. Terminating.\n",
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+ __FUNCTION__, strerror(errno), errno);
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+ return -EINVAL;
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+ };
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+ server = t->peer;
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+ flags = fcntl(ufd, F_GETFL);
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+ if (flags == -1 || fcntl(ufd, F_SETFL, flags | O_NONBLOCK) == -1) {
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+ l2tp_log (LOG_WARNING, "%s: Unable to set UDP socket nonblock.\n",
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+ __FUNCTION__);
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+ return -EINVAL;
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+ }
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+ if (connect (ufd, (struct sockaddr *) &server, sizeof(server)) < 0) {
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+ l2tp_log (LOG_CRIT, "%s: Unable to connect UDP peer. Terminating.\n",
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+ __FUNCTION__);
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+ return -EINVAL;
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+ }
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+
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+ t->udp_fd=ufd;
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+
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+ fd2 = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP);
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+ if (fd2 < 0) {
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+ l2tp_log (LOG_WARNING, "%s: Unable to allocate PPPoL2TP socket.\n",
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+ __FUNCTION__);
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+ return -EINVAL;
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+ }
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+ flags = fcntl(fd2, F_GETFL);
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+ if (flags == -1 || fcntl(fd2, F_SETFL, flags | O_NONBLOCK) == -1) {
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+ l2tp_log (LOG_WARNING, "%s: Unable to set PPPoL2TP socket nonblock.\n",
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+ __FUNCTION__);
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+ return -EINVAL;
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+ }
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+ sax.sa_family = AF_PPPOX;
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+ sax.sa_protocol = PX_PROTO_OL2TP;
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+ sax.pppol2tp.pid = 0;
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+ sax.pppol2tp.fd = t->udp_fd;
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+ sax.pppol2tp.addr.sin_addr.s_addr = t->peer.sin_addr.s_addr;
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+ sax.pppol2tp.addr.sin_port = t->peer.sin_port;
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+ sax.pppol2tp.addr.sin_family = AF_INET;
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+ sax.pppol2tp.s_tunnel = t->ourtid;
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+ sax.pppol2tp.s_session = 0;
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+ sax.pppol2tp.d_tunnel = t->tid;
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+ sax.pppol2tp.d_session = 0;
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+ if ((connect(fd2, (struct sockaddr *)&sax, sizeof(sax))) < 0) {
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+ l2tp_log (LOG_WARNING, "%s: Unable to connect PPPoL2TP socket. %d %s\n",
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+ __FUNCTION__, errno, strerror(errno));
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+ close(fd2);
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+ return -EINVAL;
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+ }
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+ t->pppox_fd = fd2;
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+ }
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+#endif
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+ return 0;
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+}
|
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|
diff --git a/xl2tpd.c b/xl2tpd.c
|
||||||
|
index 307ac2e..3fb6dd7 100644
|
||||||
|
--- 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 ppp_opts *opts)
|
||||||
|
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 ppp_opts *opts)
|
||||||
|
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 ppp_opts *opts)
|
||||||
|
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 ppp_opts *opts)
|
||||||
|
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 ppp_opts *opts)
|
||||||
|
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);
|
||||||
|
}
|
||||||
Loading…
Reference in new issue