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openwrt-owl/package/ppp/patches/500-add-pptp-plugin.patch

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ppp: add support for kernel mode pptp - add ppp-mod-pptp, based on patch by Daniel Golle <dgolle@allnet.de> - add netifd integration for pptp to ppp.sh SVN-Revision: 32197
2012-06-11 20:07:46 +00:00
--- a/configure
+++ b/configure
@@ -195,7 +195,7 @@ if [ -d "$ksrc" ]; then
mkmkf $ksrc/Makedefs$compiletype Makedefs.com
for dir in pppd pppstats chat pppdump pppd/plugins pppd/plugins/rp-pppoe \
pppd/plugins/radius pppd/plugins/pppoatm \
- pppd/plugins/pppol2tp; do
+ pppd/plugins/pppol2tp pppd/plugins/pptp ; do
mkmkf $dir/Makefile.$makext $dir/Makefile
done
if [ -f $ksrc/Makefile.$makext$archvariant ]; then
--- a/pppd/plugins/Makefile.linux
+++ b/pppd/plugins/Makefile.linux
@@ -9,7 +9,7 @@ BINDIR = $(DESTDIR)/sbin
MANDIR = $(DESTDIR)/share/man/man8
LIBDIR = $(DESTDIR)/lib/pppd/$(VERSION)
-SUBDIRS := rp-pppoe pppoatm pppol2tp
+SUBDIRS := rp-pppoe pppoatm pppol2tp pptp
# Uncomment the next line to include the radius authentication plugin
SUBDIRS += radius
PLUGINS := minconn.so passprompt.so passwordfd.so winbind.so
--- /dev/null
+++ b/pppd/plugins/pptp/Makefile.linux
@@ -0,0 +1,31 @@
+#
+# This program may be distributed according to the terms of the GNU
+# General Public License, version 2 or (at your option) any later version.
+#
+# $Id: Makefile.linux,v 1.9 2012/05/04 21:48:00 dgolle Exp $
+#***********************************************************************
+
+DESTDIR = $(INSTROOT)@DESTDIR@
+LIBDIR = $(DESTDIR)/lib/pppd/$(PPPDVERSION)
+
+PPPDVERSION = $(shell awk -F '"' '/VERSION/ { print $$2; }' ../../patchlevel.h)
+
+INSTALL = install
+
+COPTS=-O2 -g
+CFLAGS = $(COPTS) -I. -I../.. -I../../../include -fPIC -DPPPD_VERSION=\"$(PPPDVERSION)\"
+all: pptp.so
+
+%.o: %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+pptp.so: dirutil.o orckit_quirks.o pptp.o pptp_callmgr.o pptp_ctrl.o pptp_quirks.o util.o vector.o
+ $(CC) -o pptp.so -shared dirutil.o orckit_quirks.o pptp.o pptp_callmgr.o pptp_ctrl.o pptp_quirks.o util.o vector.o
+
+install: all
+ $(INSTALL) -d -m 755 $(LIBDIR)
+ $(INSTALL) -c -m 4550 pptp.so $(LIBDIR)
+
+clean:
+ rm -f *.o *.so
+
--- /dev/null
+++ b/pppd/plugins/pptp/dirutil.c
@@ -0,0 +1,68 @@
+/* dirutil.c ... directory utilities.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: dirutil.c,v 1.2 2003/06/17 17:25:47 reink Exp $
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "dirutil.h"
+
+/* Returned malloc'ed string representing basename */
+char *basenamex(char *pathname)
+{
+ char *dup = strdup(pathname);
+ char *ptr = strrchr(stripslash(dup), '/');
+ if (ptr == NULL) return dup;
+ ptr = strdup(ptr+1);
+ free(dup);
+ return ptr;
+}
+
+/* Return malloc'ed string representing directory name (no trailing slash) */
+char *dirnamex(char *pathname)
+{
+ char *dup = strdup(pathname);
+ char *ptr = strrchr(stripslash(dup), '/');
+ if (ptr == NULL) { free(dup); return strdup("."); }
+ if (ptr == dup && dup[0] == '/') ptr++;
+ *ptr = '\0';
+ return dup;
+}
+
+/* In-place modify a string to remove trailing slashes. Returns arg.
+ * stripslash("/") returns "/";
+ */
+char *stripslash(char *pathname) {
+ int len = strlen(pathname);
+ while (len > 1 && pathname[len - 1] == '/')
+ pathname[--len] = '\0';
+ return pathname;
+}
+
+/* ensure dirname exists, creating it if necessary. */
+int make_valid_path(char *dir, mode_t mode)
+{
+ struct stat st;
+ char *tmp = NULL, *path = stripslash(strdup(dir));
+ int retval;
+ if (stat(path, &st) == 0) { /* file exists */
+ if (S_ISDIR(st.st_mode)) { retval = 1; goto end; }
+ else { retval = 0; goto end; } /* not a directory. Oops. */
+ }
+ /* Directory doesn't exist. Let's make it. */
+ /* Make parent first. */
+ if (!make_valid_path(tmp = dirnamex(path), mode)) { retval = 0; goto end; }
+ /* Now make this 'un. */
+ if (mkdir(path, mode) < 0) { retval = 0; goto end; }
+ /* Success. */
+ retval = 1;
+
+end:
+ if (tmp != NULL) free(tmp);
+ if (path != NULL) free(path);
+ return retval;
+}
--- /dev/null
+++ b/pppd/plugins/pptp/dirutil.h
@@ -0,0 +1,14 @@
+/* dirutil.h ... directory utilities.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: dirutil.h,v 1.1.1.1 2000/12/23 08:19:51 scott Exp $
+ */
+
+/* Returned malloc'ed string representing basename */
+char *basenamex(char *pathname);
+/* Return malloc'ed string representing directory name (no trailing slash) */
+char *dirnamex(char *pathname);
+/* In-place modify a string to remove trailing slashes. Returns arg. */
+char *stripslash(char *pathname);
+/* ensure dirname exists, creating it if necessary. */
+int make_valid_path(char *dirname, mode_t mode);
--- /dev/null
+++ b/pppd/plugins/pptp/orckit_quirks.c
@@ -0,0 +1,86 @@
+/* orckit_quirks.c ...... fix quirks in orckit adsl modems
+ * mulix <mulix@actcom.co.il>
+ *
+ * $Id: orckit_quirks.c,v 1.3 2002/03/01 01:23:36 quozl Exp $
+ */
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include "pptp_msg.h"
+#include "pptp_options.h"
+#include "pptp_ctrl.h"
+#include "util.h"
+
+
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_build_hook(struct pptp_out_call_rqst* packet)
+{
+ unsigned int name_length = 10;
+
+ struct pptp_out_call_rqst fixed_packet = {
+ PPTP_HEADER_CTRL(PPTP_OUT_CALL_RQST),
+ 0, /* hton16(call->callid) */
+ 0, /* hton16(call->sernum) */
+ hton32(PPTP_BPS_MIN), hton32(PPTP_BPS_MAX),
+ hton32(PPTP_BEARER_DIGITAL), hton32(PPTP_FRAME_ANY),
+ hton16(PPTP_WINDOW), 0, hton16(name_length), 0,
+ {'R','E','L','A','Y','_','P','P','P','1',0}, {0}
+ };
+
+ if (!packet)
+ return -1;
+
+ memcpy(packet, &fixed_packet, sizeof(*packet));
+
+ return 0;
+}
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_set_link_hook(struct pptp_set_link_info* packet,
+ int peer_call_id)
+{
+ struct pptp_set_link_info fixed_packet = {
+ PPTP_HEADER_CTRL(PPTP_SET_LINK_INFO),
+ hton16(peer_call_id),
+ 0,
+ 0xffffffff,
+ 0xffffffff};
+
+ if (!packet)
+ return -1;
+
+ memcpy(packet, &fixed_packet, sizeof(*packet));
+ return 0;
+}
+
+/* return 0 on success, non 0 otherwise */
+int
+orckit_atur3_start_ctrl_conn_hook(struct pptp_start_ctrl_conn* packet)
+{
+ struct pptp_start_ctrl_conn fixed_packet = {
+ {0}, /* we'll set the header later */
+ hton16(PPTP_VERSION), 0, 0,
+ hton32(PPTP_FRAME_ASYNC), hton32(PPTP_BEARER_ANALOG),
+ hton16(0) /* max channels */,
+ hton16(0x6021),
+ {'R','E','L','A','Y','_','P','P','P','1',0}, /* hostname */
+ {'M','S',' ','W','i','n',' ','N','T',0} /* vendor */
+ };
+
+ if (!packet)
+ return -1;
+
+ /* grab the header from the original packet, since we dont
+ know if this is a request or a reply */
+ memcpy(&fixed_packet.header, &packet->header, sizeof(struct pptp_header));
+
+ /* and now overwrite the full packet, effectively preserving the header */
+ memcpy(packet, &fixed_packet, sizeof(*packet));
+ return 0;
+}
+
+
--- /dev/null
+++ b/pppd/plugins/pptp/orckit_quirks.h
@@ -0,0 +1,27 @@
+/* orckit_quirks.h ...... fix quirks in orckit adsl modems
+ * mulix <mulix@actcom.co.il>
+ *
+ * $Id: orckit_quirks.h,v 1.2 2001/11/23 03:42:51 quozl Exp $
+ */
+
+#ifndef INC_ORCKIT_QUIRKS_H_
+#define INC_ORCKIT_QUIRKS_H_
+
+#include "pptp_options.h"
+#include "pptp_ctrl.h"
+#include "pptp_msg.h"
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_build_hook(struct pptp_out_call_rqst* packt);
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_set_link_hook(struct pptp_set_link_info* packet,
+ int peer_call_id);
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_start_ctrl_conn_hook(struct pptp_start_ctrl_conn* packet);
+
+#endif /* INC_ORCKIT_QUIRKS_H_ */
--- /dev/null
+++ b/pppd/plugins/pptp/pppd-pptp.8
@@ -0,0 +1,68 @@
+.\" manual page [] for PPTP plugin for pppd 2.4
+.\" $Id: pppd-pptp.8,v 1.0 2007/10/17 13:27:17 kad Exp $
+.\" SH section heading
+.\" SS subsection heading
+.\" LP paragraph
+.\" IP indented paragraph
+.\" TP hanging label
+.TH PPPD-PPTP 8
+.SH NAME
+pptp.so \- PPTP VPN plugin for
+.BR pppd (8)
+.SH SYNOPSIS
+.B pppd
+[
+.I options
+]
+plugin pptp.so
+.SH DESCRIPTION
+.LP
+The PPTP plugin for pppd performs interaction with pptp kernel module
+and has built-in call manager (client part of PPTP).
+It pasees necessary paremeters from \fIoptions\fR into kernel module
+to configure ppp-pptp channel. If it runs in client mode, then additionally
+call manager starts up. PPTPD daemon automaticaly invokes this plugin
+in server mode and passes necessary options, so additional configuration
+is not needed.
+
+.SH OPTIONS for client mode
+The PPTP plugin introduces one additional pppd option:
+.TP
+.BI "pptp_server " server " (required)"
+Specifies ip address or hostname of pptp server.
+.TP
+.BI "pptp_window " packets " (optional)"
+The amount of sliding window size.
+Set to 0 to turn off sliding window.
+ to 3-10 for low speed connections.
+ to >10 for hi speed connections.
+Default is 50
+.TP
+.BI "pptp_phone " phone " (optional)"
+The phone string that sended to pptp server.
+.SH USAGE
+Sample configuration file:
+.nf
+plugin "pptp.so"
+pptp_server 192.168.0.1
+pptp_window 100
+name myname
+remotename pptp
+noauth
+refuse-eap
+refuse-chap
+refuse-mschap
+nobsdcomp
+nodeflate
+novj
+novjccomp
+require-mppe-128
+lcp-echo-interval 20
+lcp-echo-failure 3
+.fi
+
+.SH SEE ALSO
+.BR pppd (8) " " pptpd (8) " " pptpd.conf (5)
+
+.SH AUTHOR
+xeb xeb@mail.ru
--- /dev/null
+++ b/pppd/plugins/pptp/pptp.c
@@ -0,0 +1,323 @@
+/***************************************************************************
+ * Copyright (C) 2006 by Kozlov D. <xeb@mail.ru> *
+ * some cleanup done (C) 2012 by Daniel Golle <dgolle@allnet.de> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+#define PPTP_VERSION "1.00"
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/ioctl.h>
+
+#include "pppd.h"
+#include "fsm.h"
+#include "lcp.h"
+#include "ipcp.h"
+#include "ccp.h"
+#include "pathnames.h"
+
+#include "pptp_callmgr.h"
+#include <net/if.h>
+#include <net/ethernet.h>
+#include <linux/if_pppox.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+extern char** environ;
+
+char pppd_version[] = PPPD_VERSION;
+extern int new_style_driver;
+
+
+char *pptp_server = NULL;
+char *pptp_client = NULL;
+char *pptp_phone = NULL;
+int pptp_window=50;
+int pptp_sock=-1;
+struct in_addr localbind = { INADDR_NONE };
+
+static int callmgr_sock;
+static int pptp_fd;
+int call_ID;
+
+static int open_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window);
+static void launch_callmgr(int call_is,struct in_addr inetaddr, char *phonenr,int window);
+static int get_call_id(int sock, pid_t gre, pid_t pppd, u_int16_t *peer_call_id);
+
+static option_t Options[] =
+{
+ { "pptp_server", o_string, &pptp_server,
+ "PPTP Server" },
+ { "pptp_client", o_string, &pptp_client,
+ "PPTP Client" },
+ { "pptp_sock",o_int, &pptp_sock,
+ "PPTP socket" },
+ { "pptp_phone", o_string, &pptp_phone,
+ "PPTP Phone number" },
+ { "pptp_window",o_int, &pptp_window,
+ "PPTP window" },
+ { NULL }
+};
+
+static int pptp_connect(void);
+static void pptp_disconnect(void);
+
+struct channel pptp_channel = {
+ options: Options,
+ check_options: NULL,
+ connect: &pptp_connect,
+ disconnect: &pptp_disconnect,
+ establish_ppp: &generic_establish_ppp,
+ disestablish_ppp: &generic_disestablish_ppp,
+ close: NULL,
+ cleanup: NULL
+};
+
+static int pptp_start_server(void)
+{
+ pptp_fd=pptp_sock;
+ sprintf(ppp_devnam,"pptp (%s)",pptp_client);
+
+ return pptp_fd;
+}
+static int pptp_start_client(void)
+{
+ socklen_t len;
+ struct sockaddr_pppox src_addr,dst_addr;
+ struct hostent *hostinfo;
+
+ hostinfo=gethostbyname(pptp_server);
+ if (!hostinfo)
+ {
+ error("PPTP: Unknown host %s\n", pptp_server);
+ return -1;
+ }
+ dst_addr.sa_addr.pptp.sin_addr=*(struct in_addr*)hostinfo->h_addr;
+ {
+ int sock;
+ struct sockaddr_in addr;
+ len=sizeof(addr);
+ addr.sin_addr=dst_addr.sa_addr.pptp.sin_addr;
+ addr.sin_family=AF_INET;
+ addr.sin_port=htons(1700);
+ sock=socket(AF_INET,SOCK_DGRAM,0);
+ if (connect(sock,(struct sockaddr*)&addr,sizeof(addr)))
+ {
+ close(sock);
+ error("PPTP: connect failed (%s)\n",strerror(errno));
+ return -1;
+ }
+ getsockname(sock,(struct sockaddr*)&addr,&len);
+ src_addr.sa_addr.pptp.sin_addr=addr.sin_addr;
+ close(sock);
+ }
+
+ src_addr.sa_family=AF_PPPOX;
+ src_addr.sa_protocol=PX_PROTO_PPTP;
+ src_addr.sa_addr.pptp.call_id=0;
+
+ dst_addr.sa_family=AF_PPPOX;
+ dst_addr.sa_protocol=PX_PROTO_PPTP;
+ dst_addr.sa_addr.pptp.call_id=0;
+
+ pptp_fd=socket(AF_PPPOX,SOCK_STREAM,PX_PROTO_PPTP);
+ if (pptp_fd<0)
+ {
+ error("PPTP: failed to create PPTP socket (%s)\n",strerror(errno));
+ return -1;
+ }
+ if (bind(pptp_fd,(struct sockaddr*)&src_addr,sizeof(src_addr)))
+ {
+ close(pptp_fd);
+ error("PPTP: failed to bind PPTP socket (%s)\n",strerror(errno));
+ return -1;
+ }
+ len=sizeof(src_addr);
+ getsockname(pptp_fd,(struct sockaddr*)&src_addr,&len);
+ call_ID=src_addr.sa_addr.pptp.call_id;
+
+ do {
+ /*
+ * Open connection to call manager (Launch call manager if necessary.)
+ */
+ callmgr_sock = open_callmgr(src_addr.sa_addr.pptp.call_id,dst_addr.sa_addr.pptp.sin_addr, pptp_phone, pptp_window);
+ if (callmgr_sock<0)
+ {
+ close(pptp_fd);
+ return -1;
+ }
+ /* Exchange PIDs, get call ID */
+ } while (get_call_id(callmgr_sock, getpid(), getpid(), &dst_addr.sa_addr.pptp.call_id) < 0);
+
+ if (connect(pptp_fd,(struct sockaddr*)&dst_addr,sizeof(dst_addr)))
+ {
+ close(callmgr_sock);
+ close(pptp_fd);
+ error("PPTP: failed to connect PPTP socket (%s)\n",strerror(errno));
+ return -1;
+ }
+
+ sprintf(ppp_devnam,"pptp (%s)",pptp_server);
+
+ return pptp_fd;
+}
+static int pptp_connect(void)
+{
+ if ((!pptp_server && !pptp_client) || (pptp_server && pptp_client))
+ {
+ fatal("PPTP: unknown mode (you must specify pptp_server or pptp_client option)");
+ return -1;
+ }
+
+ if (pptp_server) return pptp_start_client();
+ return pptp_start_server();
+}
+
+static void pptp_disconnect(void)
+{
+ if (pptp_server) close(callmgr_sock);
+ close(pptp_fd);
+}
+
+static int open_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window)
+{
+ /* Try to open unix domain socket to call manager. */
+ struct sockaddr_un where;
+ const int NUM_TRIES = 3;
+ int i, fd;
+ pid_t pid;
+ int status;
+ /* Open socket */
+ if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+ {
+ fatal("Could not create unix domain socket: %s", strerror(errno));
+ }
+ /* Make address */
+ callmgr_name_unixsock(&where, inetaddr, localbind);
+ for (i = 0; i < NUM_TRIES; i++)
+ {
+ if (connect(fd, (struct sockaddr *) &where, sizeof(where)) < 0)
+ {
+ /* couldn't connect. We'll have to launch this guy. */
+
+ unlink (where.sun_path);
+
+ /* fork and launch call manager process */
+ switch (pid = fork())
+ {
+ case -1: /* failure */
+ fatal("fork() to launch call manager failed.");
+ case 0: /* child */
+ {
+ /* close the pty and gre in the call manager */
+ close(fd);
+ close(pptp_fd);
+ launch_callmgr(call_id,inetaddr,phonenr,window);
+ }
+ default: /* parent */
+ waitpid(pid, &status, 0);
+ if (status!= 0)
+ {
+ close(fd);
+ error("Call manager exited with error %d", status);
+ return -1;
+ }
+ break;
+ }
+ sleep(1);
+ }
+ else return fd;
+ }
+ close(fd);
+ error("Could not launch call manager after %d tries.", i);
+ return -1; /* make gcc happy */
+}
+
+/*** call the call manager main ***********************************************/
+static void launch_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window)
+{
+ dbglog("pptp: call manager for %s\n", inet_ntoa(inetaddr));
+ dbglog("window size:\t%d\n",window);
+ if (phonenr) dbglog("phone number:\t'%s'\n",phonenr);
+ dbglog("call id:\t%d\n",call_id);
+ exit(callmgr_main(inetaddr, phonenr, window, call_id));
+}
+
+/*** exchange data with the call manager *************************************/
+/* XXX need better error checking XXX */
+static int get_call_id(int sock, pid_t gre, pid_t pppd,
+ u_int16_t *peer_call_id)
+{
+ u_int16_t m_call_id, m_peer_call_id;
+ /* write pid's to socket */
+ /* don't bother with network byte order, because pid's are meaningless
+ * outside the local host.
+ */
+ int rc;
+ rc = write(sock, &gre, sizeof(gre));
+ if (rc != sizeof(gre))
+ return -1;
+ rc = write(sock, &pppd, sizeof(pppd));
+ if (rc != sizeof(pppd))
+ return -1;
+ rc = read(sock, &m_call_id, sizeof(m_call_id));
+ if (rc != sizeof(m_call_id))
+ return -1;
+ rc = read(sock, &m_peer_call_id, sizeof(m_peer_call_id));
+ if (rc != sizeof(m_peer_call_id))
+ return -1;
+ /*
+ * XXX FIXME ... DO ERROR CHECKING & TIME-OUTS XXX
+ * (Rhialto: I am assuming for now that timeouts are not relevant
+ * here, because the read and write calls would return -1 (fail) when
+ * the peer goes away during the process. We know it is (or was)
+ * running because the connect() call succeeded.)
+ * (James: on the other hand, if the route to the peer goes away, we
+ * wouldn't get told by read() or write() for quite some time.)
+ */
+ *peer_call_id = m_peer_call_id;
+ return 0;
+}
+
+void plugin_init(void)
+{
+ add_options(Options);
+
+ info("PPTP plugin version %s", PPTP_VERSION);
+
+ the_channel = &pptp_channel;
+ modem = 0;
+}
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_callmgr.c
@@ -0,0 +1,381 @@
+/* pptp_callmgr.c ... Call manager for PPTP connections.
+ * Handles TCP port 1723 protocol.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_callmgr.c,v 1.20 2005/03/31 07:42:39 quozl Exp $
+ */
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <errno.h>
+#include "pptp_callmgr.h"
+#include "pptp_ctrl.h"
+#include "pptp_msg.h"
+#include "dirutil.h"
+#include "vector.h"
+#include "util.h"
+#include "pppd.h"
+
+extern struct in_addr localbind; /* from pptp.c */
+extern int call_ID;
+
+int open_inetsock(struct in_addr inetaddr);
+int open_unixsock(struct in_addr inetaddr);
+void close_inetsock(int fd, struct in_addr inetaddr);
+void close_unixsock(int fd, struct in_addr inetaddr);
+
+sigjmp_buf callmgr_env;
+
+void callmgr_sighandler(int sig) {
+ /* TODO: according to signal(2), siglongjmp() is unsafe used here */
+ siglongjmp (callmgr_env, 1);
+}
+
+void callmgr_do_nothing(int sig) {
+ /* do nothing signal handler */
+}
+
+struct local_callinfo {
+ int unix_sock;
+ pid_t pid[2];
+};
+
+struct local_conninfo {
+ VECTOR * call_list;
+ fd_set * call_set;
+};
+
+/* Call callback */
+void call_callback(PPTP_CONN *conn, PPTP_CALL *call, enum call_state state)
+{
+ struct local_callinfo *lci;
+ struct local_conninfo *conninfo;
+ u_int16_t call_id[2];
+ switch(state) {
+ case CALL_OPEN_DONE:
+ /* okey dokey. This means that the call_id and peer_call_id are
+ * now valid, so lets send them on to our friends who requested
+ * this call. */
+ lci = pptp_call_closure_get(conn, call); assert(lci != NULL);
+ pptp_call_get_ids(conn, call, &call_id[0], &call_id[1]);
+ write(lci->unix_sock, &call_id, sizeof(call_id));
+ /* Our duty to the fatherland is now complete. */
+ break;
+ case CALL_OPEN_FAIL:
+ case CALL_CLOSE_RQST:
+ case CALL_CLOSE_DONE:
+ /* don't need to do anything here, except make sure tables
+ * are sync'ed */
+ dbglog("Closing connection (call state)");
+ conninfo = pptp_conn_closure_get(conn);
+ lci = pptp_call_closure_get(conn, call);
+ assert(lci != NULL && conninfo != NULL);
+ if (vector_contains(conninfo->call_list, lci->unix_sock)) {
+ vector_remove(conninfo->call_list, lci->unix_sock);
+ close(lci->unix_sock);
+ FD_CLR(lci->unix_sock, conninfo->call_set);
+ }
+ break;
+ default:
+ dbglog("Unhandled call callback state [%d].", (int) state);
+ break;
+ }
+}
+
+/******************************************************************************
+ * NOTE ABOUT 'VOLATILE':
+ * several variables here get a volatile qualifier to silence warnings
+ * from older (before 3.0) gccs. if the longjmp stuff is removed,
+ * the volatile qualifiers should be removed as well.
+ *****************************************************************************/
+
+/*** Call Manager *************************************************************/
+int callmgr_main(struct in_addr inetaddr, char phonenr[], int window, int pcallid)
+{
+ int inet_sock, unix_sock;
+ fd_set call_set;
+ PPTP_CONN * conn;
+ VECTOR * call_list;
+ int max_fd = 0;
+ volatile int first = 1;
+ int retval;
+ int i;
+ if (pcallid>0) call_ID=pcallid;
+
+ /* Step 1: Open sockets. */
+ if ((inet_sock = open_inetsock(inetaddr)) < 0)
+ fatal("Could not open control connection to %s", inet_ntoa(inetaddr));
+ dbglog("control connection");
+ if ((unix_sock = open_unixsock(inetaddr)) < 0)
+ fatal("Could not open unix socket for %s", inet_ntoa(inetaddr));
+ /* Step 1b: FORK and return status to calling process. */
+ dbglog("unix_sock");
+
+ switch (fork()) {
+ case 0: /* child. stick around. */
+ break;
+ case -1: /* failure. Fatal. */
+ fatal("Could not fork.");
+ default: /* Parent. Return status to caller. */
+ exit(0);
+ }
+ /* re-open stderr as /dev/null to release it */
+ file2fd("/dev/null", "wb", STDERR_FILENO);
+ /* Step 1c: Clean up unix socket on TERM */
+ if (sigsetjmp(callmgr_env, 1) != 0)
+ goto cleanup;
+ signal(SIGINT, callmgr_sighandler);
+ signal(SIGTERM, callmgr_sighandler);
+ signal(SIGPIPE, callmgr_do_nothing);
+ signal(SIGUSR1, callmgr_do_nothing); /* signal state change
+ wake up accept */
+ /* Step 2: Open control connection and register callback */
+ if ((conn = pptp_conn_open(inet_sock, 1, NULL/* callback */)) == NULL) {
+ close(unix_sock); close(inet_sock); fatal("Could not open connection.");
+ }
+ FD_ZERO(&call_set);
+ call_list = vector_create();
+ {
+ struct local_conninfo *conninfo = malloc(sizeof(*conninfo));
+ if (conninfo == NULL) {
+ close(unix_sock); close(inet_sock); fatal("No memory.");
+ }
+ conninfo->call_list = call_list;
+ conninfo->call_set = &call_set;
+ pptp_conn_closure_put(conn, conninfo);
+ }
+ if (sigsetjmp(callmgr_env, 1) != 0) goto shutdown;
+ /* Step 3: Get FD_SETs */
+ max_fd = unix_sock;
+ do {
+ int rc;
+ fd_set read_set = call_set, write_set;
+ FD_ZERO (&write_set);
+ if (pptp_conn_established(conn)) {
+ FD_SET (unix_sock, &read_set);
+ if (unix_sock > max_fd) max_fd = unix_sock;
+ }
+ pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+ for (; max_fd > 0 ; max_fd--) {
+ if (FD_ISSET (max_fd, &read_set) ||
+ FD_ISSET (max_fd, &write_set))
+ break;
+ }
+ /* Step 4: Wait on INET or UNIX event */
+ if ((rc = select(max_fd + 1, &read_set, &write_set, NULL, NULL)) <0) {
+ if (errno == EBADF) break;
+ /* a signal or somesuch. */
+ continue;
+ }
+ /* Step 5a: Handle INET events */
+ rc = pptp_dispatch(conn, &read_set, &write_set);
+ if (rc < 0)
+ break;
+ /* Step 5b: Handle new connection to UNIX socket */
+ if (FD_ISSET(unix_sock, &read_set)) {
+ /* New call! */
+ struct sockaddr_un from;
+ int len = sizeof(from);
+ PPTP_CALL * call;
+ struct local_callinfo *lci;
+ int s;
+ /* Accept the socket */
+ FD_CLR (unix_sock, &read_set);
+ if ((s = accept(unix_sock, (struct sockaddr *) &from, &len)) < 0) {
+ warn("Socket not accepted: %s", strerror(errno));
+ goto skip_accept;
+ }
+ /* Allocate memory for local call information structure. */
+ if ((lci = malloc(sizeof(*lci))) == NULL) {
+ warn("Out of memory."); close(s); goto skip_accept;
+ }
+ lci->unix_sock = s;
+ /* Give the initiator time to write the PIDs while we open
+ * the call */
+ call = pptp_call_open(conn, call_ID,call_callback, phonenr,window);
+ /* Read and store the associated pids */
+ read(s, &lci->pid[0], sizeof(lci->pid[0]));
+ read(s, &lci->pid[1], sizeof(lci->pid[1]));
+ /* associate the local information with the call */
+ pptp_call_closure_put(conn, call, (void *) lci);
+ /* The rest is done on callback. */
+ /* Keep alive; wait for close */
+ retval = vector_insert(call_list, s, call); assert(retval);
+ if (s > max_fd) max_fd = s;
+ FD_SET(s, &call_set);
+ first = 0;
+ }
+skip_accept: /* Step 5c: Handle socket close */
+ for (i = 0; i < max_fd + 1; i++)
+ if (FD_ISSET(i, &read_set)) {
+ /* close it */
+ PPTP_CALL * call;
+ retval = vector_search(call_list, i, &call);
+ if (retval) {
+ struct local_callinfo *lci =
+ pptp_call_closure_get(conn, call);
+ dbglog("Closing connection (unhandled)");
+ free(lci);
+ /* soft shutdown. Callback will do hard shutdown later */
+ pptp_call_close(conn, call);
+ vector_remove(call_list, i);
+ }
+ FD_CLR(i, &call_set);
+ close(i);
+ }
+ } while (vector_size(call_list) > 0 || first);
+shutdown:
+ {
+ int rc;
+ fd_set read_set, write_set;
+ struct timeval tv;
+ signal(SIGINT, callmgr_do_nothing);
+ signal(SIGTERM, callmgr_do_nothing);
+ /* warn("Shutdown"); */
+ /* kill all open calls */
+ for (i = 0; i < vector_size(call_list); i++) {
+ PPTP_CALL *call = vector_get_Nth(call_list, i);
+ dbglog("Closing connection (shutdown)");
+ pptp_call_close(conn, call);
+ }
+ /* attempt to dispatch these messages */
+ FD_ZERO(&read_set);
+ FD_ZERO(&write_set);
+ pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+ rc = pptp_dispatch(conn, &read_set, &write_set);
+ if (rc > 0) {
+ /* wait for a respond, a timeout because there might not be one */
+ FD_ZERO(&read_set);
+ FD_ZERO(&write_set);
+ pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+ select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+ rc = pptp_dispatch(conn, &read_set, &write_set);
+ if (rc > 0) {
+ if (i > 0) sleep(2);
+ /* no more open calls. Close the connection. */
+ pptp_conn_close(conn, PPTP_STOP_LOCAL_SHUTDOWN);
+ /* wait for a respond, a timeout because there might not be one */
+ FD_ZERO(&read_set);
+ FD_ZERO(&write_set);
+ pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+ select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+ pptp_dispatch(conn, &read_set, &write_set);
+ if (rc > 0) sleep(2);
+ }
+ }
+ /* with extreme prejudice */
+ pptp_conn_destroy(conn);
+ vector_destroy(call_list);
+ }
+cleanup:
+ signal(SIGINT, callmgr_do_nothing);
+ signal(SIGTERM, callmgr_do_nothing);
+ close_inetsock(inet_sock, inetaddr);
+ close_unixsock(unix_sock, inetaddr);
+ return 0;
+}
+
+/*** open_inetsock ************************************************************/
+int open_inetsock(struct in_addr inetaddr)
+{
+ struct sockaddr_in dest, src;
+ int s;
+ dest.sin_family = AF_INET;
+ dest.sin_port = htons(PPTP_PORT);
+ dest.sin_addr = inetaddr;
+ if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ warn("socket: %s", strerror(errno));
+ return s;
+ }
+ if (localbind.s_addr != INADDR_NONE) {
+ bzero(&src, sizeof(src));
+ src.sin_family = AF_INET;
+ src.sin_addr = localbind;
+ if (bind(s, (struct sockaddr *) &src, sizeof(src)) != 0) {
+ warn("bind: %s", strerror(errno));
+ close(s); return -1;
+ }
+ }
+ if (connect(s, (struct sockaddr *) &dest, sizeof(dest)) < 0) {
+ warn("connect: %s", strerror(errno));
+ close(s); return -1;
+ }
+ return s;
+}
+
+/*** open_unixsock ************************************************************/
+int open_unixsock(struct in_addr inetaddr)
+{
+ struct sockaddr_un where;
+ struct stat st;
+ char *dir;
+ int s;
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ warn("socket: %s", strerror(errno));
+ return s;
+ }
+ callmgr_name_unixsock( &where, inetaddr, localbind);
+ if (stat(where.sun_path, &st) >= 0)
+ {
+ warn("Call manager for %s is already running.", inet_ntoa(inetaddr));
+ close(s); return -1;
+ }
+ /* Make sure path is valid. */
+ dir = dirnamex(where.sun_path);
+ if (!make_valid_path(dir, 0770))
+ fatal("Could not make path to %s: %s", where.sun_path, strerror(errno));
+ free(dir);
+ if (bind(s, (struct sockaddr *) &where, sizeof(where)) < 0) {
+ warn("bind: %s", strerror(errno));
+ close(s); return -1;
+ }
+ chmod(where.sun_path, 0777);
+ listen(s, 127);
+ return s;
+}
+
+/*** close_inetsock ***********************************************************/
+void close_inetsock(int fd, struct in_addr inetaddr)
+{
+ close(fd);
+}
+
+/*** close_unixsock ***********************************************************/
+void close_unixsock(int fd, struct in_addr inetaddr)
+{
+ struct sockaddr_un where;
+ close(fd);
+ callmgr_name_unixsock(&where, inetaddr, localbind);
+ unlink(where.sun_path);
+}
+
+/*** make a unix socket address ***********************************************/
+void callmgr_name_unixsock(struct sockaddr_un *where,
+ struct in_addr inetaddr,
+ struct in_addr localbind)
+{
+ char localaddr[16], remoteaddr[16];
+ where->sun_family = AF_UNIX;
+ strncpy(localaddr, inet_ntoa(localbind), 16);
+ strncpy(remoteaddr, inet_ntoa(inetaddr), 16);
+ snprintf(where->sun_path, sizeof(where->sun_path),
+ PPTP_SOCKET_PREFIX "%s:%i", remoteaddr,call_ID);
+}
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_callmgr.h
@@ -0,0 +1,17 @@
+/* pptp_callmgr.h ... Call manager for PPTP connections.
+ * Handles TCP port 1723 protocol.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_callmgr.h,v 1.3 2003/02/17 00:22:17 quozl Exp $
+ */
+
+#define PPTP_SOCKET_PREFIX "/var/run/pptp/"
+
+int callmgr_main(struct in_addr inetaddr,
+ char phonenr[],
+ int window,
+ int pcallid);
+
+void callmgr_name_unixsock(struct sockaddr_un *where,
+ struct in_addr inetaddr,
+ struct in_addr localbind);
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_ctrl.c
@@ -0,0 +1,1077 @@
+/* pptp_ctrl.c ... handle PPTP control connection.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_ctrl.c,v 1.31 2005/03/31 07:42:39 quozl Exp $
+ */
+
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <signal.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include "pptp_msg.h"
+#include "pptp_ctrl.h"
+#include "pptp_options.h"
+#include "vector.h"
+#include "util.h"
+#include "pptp_quirks.h"
+
+/* BECAUSE OF SIGNAL LIMITATIONS, EACH PROCESS CAN ONLY MANAGE ONE
+ * CONNECTION. SO THIS 'PPTP_CONN' STRUCTURE IS A BIT MISLEADING.
+ * WE'LL KEEP CONNECTION-SPECIFIC INFORMATION IN THERE ANYWAY (AS
+ * OPPOSED TO USING GLOBAL VARIABLES), BUT BEWARE THAT THE ENTIRE
+ * UNIX SIGNAL-HANDLING SEMANTICS WOULD HAVE TO CHANGE (OR THE
+ * TIME-OUT CODE DRASTICALLY REWRITTEN) BEFORE YOU COULD DO A
+ * PPTP_CONN_OPEN MORE THAN ONCE PER PROCESS AND GET AWAY WITH IT.
+ */
+
+/* This structure contains connection-specific information that the
+ * signal handler needs to see. Thus, it needs to be in a global
+ * variable. If you end up using pthreads or something (why not
+ * just processes?), this would have to be placed in a thread-specific
+ * data area, using pthread_get|set_specific, etc., so I've
+ * conveniently encapsulated it for you.
+ * [linux threads will have to support thread-specific signals
+ * before this would work at all, which, as of this writing
+ * (linux-threads v0.6, linux kernel 2.1.72), it does not.]
+ */
+
+/* Globals */
+
+/* control the number of times echo packets will be logged */
+static int nlogecho = 10;
+
+static struct thread_specific {
+ struct sigaction old_sigaction; /* evil signals */
+ PPTP_CONN * conn;
+} global;
+
+#define INITIAL_BUFSIZE 512 /* initial i/o buffer size. */
+
+struct PPTP_CONN {
+ int inet_sock;
+ /* Connection States */
+ enum {
+ CONN_IDLE, CONN_WAIT_CTL_REPLY, CONN_WAIT_STOP_REPLY, CONN_ESTABLISHED
+ } conn_state; /* on startup: CONN_IDLE */
+ /* Keep-alive states */
+ enum {
+ KA_NONE, KA_OUTSTANDING
+ } ka_state; /* on startup: KA_NONE */
+ /* Keep-alive ID; monotonically increasing (watch wrap-around!) */
+ u_int32_t ka_id; /* on startup: 1 */
+ /* Other properties. */
+ u_int16_t version;
+ u_int16_t firmware_rev;
+ u_int8_t hostname[64], vendor[64];
+ /* XXX these are only PNS properties, currently XXX */
+ /* Call assignment information. */
+ u_int16_t call_serial_number;
+ VECTOR *call;
+ void * closure;
+ pptp_conn_cb callback;
+ /******* IO buffers ******/
+ char * read_buffer, *write_buffer;
+ size_t read_alloc, write_alloc;
+ size_t read_size, write_size;
+};
+
+struct PPTP_CALL {
+ /* Call properties */
+ enum {
+ PPTP_CALL_PAC, PPTP_CALL_PNS
+ } call_type;
+ union {
+ enum pptp_pac_state {
+ PAC_IDLE, PAC_WAIT_REPLY, PAC_ESTABLISHED, PAC_WAIT_CS_ANS
+ } pac;
+ enum pptp_pns_state {
+ PNS_IDLE, PNS_WAIT_REPLY, PNS_ESTABLISHED, PNS_WAIT_DISCONNECT
+ } pns;
+ } state;
+ u_int16_t call_id, peer_call_id;
+ u_int16_t sernum;
+ u_int32_t speed;
+ /* For user data: */
+ pptp_call_cb callback;
+ void * closure;
+};
+
+
+/* PPTP error codes: ----------------------------------------------*/
+
+/* (General Error Codes) */
+static const struct {
+ const char *name, *desc;
+} pptp_general_errors[] = {
+#define PPTP_GENERAL_ERROR_NONE 0
+ { "(None)", "No general error" },
+#define PPTP_GENERAL_ERROR_NOT_CONNECTED 1
+ { "(Not-Connected)", "No control connection exists yet for this "
+ "PAC-PNS pair" },
+#define PPTP_GENERAL_ERROR_BAD_FORMAT 2
+ { "(Bad-Format)", "Length is wrong or Magic Cookie value is incorrect" },
+#define PPTP_GENERAL_ERROR_BAD_VALUE 3
+ { "(Bad-Value)", "One of the field values was out of range or "
+ "reserved field was non-zero" },
+#define PPTP_GENERAL_ERROR_NO_RESOURCE 4
+ { "(No-Resource)", "Insufficient resources to handle this command now" },
+#define PPTP_GENERAL_ERROR_BAD_CALLID 5
+ { "(Bad-Call ID)", "The Call ID is invalid in this context" },
+#define PPTP_GENERAL_ERROR_PAC_ERROR 6
+ { "(PAC-Error)", "A generic vendor-specific error occured in the PAC" }
+};
+
+#define MAX_GENERAL_ERROR ( sizeof(pptp_general_errors) / \
+ sizeof(pptp_general_errors[0]) - 1)
+
+/* Outgoing Call Reply Result Codes */
+static const char *pptp_out_call_reply_result[] = {
+/* 0 */ "Unknown Result Code",
+/* 1 */ "Connected",
+/* 2 */ "General Error",
+/* 3 */ "No Carrier Detected",
+/* 4 */ "Busy Signal",
+/* 5 */ "No Dial Tone",
+/* 6 */ "Time Out",
+/* 7 */ "Not Accepted, Call is administratively prohibited" };
+
+#define MAX_OUT_CALL_REPLY_RESULT 7
+
+/* Call Disconnect Notify Result Codes */
+static const char *pptp_call_disc_ntfy[] = {
+/* 0 */ "Unknown Result Code",
+/* 1 */ "Lost Carrier",
+/* 2 */ "General Error",
+/* 3 */ "Administrative Shutdown",
+/* 4 */ "(your) Request" };
+
+#define MAX_CALL_DISC_NTFY 4
+
+/* Call Disconnect Notify Result Codes */
+static const char *pptp_start_ctrl_conn_rply[] = {
+/* 0 */ "Unknown Result Code",
+/* 1 */ "Successful Channel Establishment",
+/* 2 */ "General Error",
+/* 3 */ "Command Channel Already Exists",
+/* 4 */ "Requester is not Authorized" };
+
+#define MAX_START_CTRL_CONN_REPLY 4
+
+/* timing options */
+int idle_wait = PPTP_TIMEOUT;
+int max_echo_wait = PPTP_TIMEOUT;
+
+/* Local prototypes */
+static void pptp_reset_timer(void);
+static void pptp_handle_timer();
+/* Write/read as much as we can without blocking. */
+int pptp_write_some(PPTP_CONN * conn);
+int pptp_read_some(PPTP_CONN * conn);
+/* Make valid packets from read_buffer */
+int pptp_make_packet(PPTP_CONN * conn, void **buf, size_t *size);
+/* Add packet to write_buffer */
+int pptp_send_ctrl_packet(PPTP_CONN * conn, void * buffer, size_t size);
+/* Dispatch packets (general) */
+int pptp_dispatch_packet(PPTP_CONN * conn, void * buffer, size_t size);
+/* Dispatch packets (control messages) */
+int ctrlp_disp(PPTP_CONN * conn, void * buffer, size_t size);
+/* Set link info, for pptp servers that need it.
+ this is a noop, unless the user specified a quirk and
+ there's a set_link hook defined in the quirks table
+ for that quirk */
+void pptp_set_link(PPTP_CONN * conn, int peer_call_id);
+
+/*** log error information in control packets *********************************/
+static void ctrlp_error( int result, int error, int cause,
+ const char *result_text[], int max_result)
+{
+ if( cause >= 0)
+ warn("Result code is %d '%s'. Error code is %d, Cause code is %d",
+ result, result_text[result <= max_result ? result : 0], error,
+ cause );
+ else
+ warn("Reply result code is %d '%s'. Error code is %d",
+ result, result_text[result <= max_result ? result : 0], error);
+ if ((error > 0) && (error <= MAX_GENERAL_ERROR)){
+ if( result != PPTP_RESULT_GENERAL_ERROR )
+ warn("Result code is something else then \"general error\", "
+ "so the following error is probably bogus.");
+ warn("Error is '%s', Error message: '%s'",
+ pptp_general_errors[error].name,
+ pptp_general_errors[error].desc);
+ }
+}
+
+static const char *ctrl_msg_types[] = {
+ "invalid control message type",
+/* (Control Connection Management) */
+ "Start-Control-Connection-Request", /* 1 */
+ "Start-Control-Connection-Reply", /* 2 */
+ "Stop-Control-Connection-Request", /* 3 */
+ "Stop-Control-Connection-Reply", /* 4 */
+ "Echo-Request", /* 5 */
+ "Echo-Reply", /* 6 */
+/* (Call Management) */
+ "Outgoing-Call-Request", /* 7 */
+ "Outgoing-Call-Reply", /* 8 */
+ "Incoming-Call-Request", /* 9 */
+ "Incoming-Call-Reply", /* 10 */
+ "Incoming-Call-Connected", /* 11 */
+ "Call-Clear-Request", /* 12 */
+ "Call-Disconnect-Notify", /* 13 */
+/* (Error Reporting) */
+ "WAN-Error-Notify", /* 14 */
+/* (PPP Session Control) */
+ "Set-Link-Info" /* 15 */
+};
+#define MAX_CTRLMSG_TYPE 15
+
+/*** report a sent packet ****************************************************/
+static void ctrlp_rep( void * buffer, int size, int isbuff)
+{
+ struct pptp_header *packet = buffer;
+ unsigned int type;
+ if(size < sizeof(struct pptp_header)) return;
+ type = ntoh16(packet->ctrl_type);
+ /* FIXME: do not report sending echo requests as long as they are
+ * sent in a signal handler. This may dead lock as the syslog call
+ * is not reentrant */
+ if( type == PPTP_ECHO_RQST ) return;
+ /* don't keep reporting sending of echo's */
+ if( (type == PPTP_ECHO_RQST || type == PPTP_ECHO_RPLY) && nlogecho <= 0 ) return;
+ dbglog("%s control packet type is %d '%s'\n",isbuff ? "Buffered" : "Sent",
+ type, ctrl_msg_types[type <= MAX_CTRLMSG_TYPE ? type : 0]);
+
+}
+
+
+
+/* Open new pptp_connection. Returns NULL on failure. */
+PPTP_CONN * pptp_conn_open(int inet_sock, int isclient, pptp_conn_cb callback)
+{
+ PPTP_CONN *conn;
+ /* Allocate structure */
+ if ((conn = malloc(sizeof(*conn))) == NULL) return NULL;
+ if ((conn->call = vector_create()) == NULL) { free(conn); return NULL; }
+ /* Initialize */
+ conn->inet_sock = inet_sock;
+ conn->conn_state = CONN_IDLE;
+ conn->ka_state = KA_NONE;
+ conn->ka_id = 1;
+ conn->call_serial_number = 0;
+ conn->callback = callback;
+ /* Create I/O buffers */
+ conn->read_size = conn->write_size = 0;
+ conn->read_alloc = conn->write_alloc = INITIAL_BUFSIZE;
+ conn->read_buffer =
+ malloc(sizeof(*(conn->read_buffer)) * conn->read_alloc);
+ conn->write_buffer =
+ malloc(sizeof(*(conn->write_buffer)) * conn->write_alloc);
+ if (conn->read_buffer == NULL || conn->write_buffer == NULL) {
+ if (conn->read_buffer != NULL) free(conn->read_buffer);
+ if (conn->write_buffer != NULL) free(conn->write_buffer);
+ vector_destroy(conn->call); free(conn); return NULL;
+ }
+ /* Make this socket non-blocking. */
+ fcntl(conn->inet_sock, F_SETFL, O_NONBLOCK);
+ /* Request connection from server, if this is a client */
+ if (isclient) {
+ struct pptp_start_ctrl_conn packet = {
+ PPTP_HEADER_CTRL(PPTP_START_CTRL_CONN_RQST),
+ hton16(PPTP_VERSION), 0, 0,
+ hton32(PPTP_FRAME_CAP), hton32(PPTP_BEARER_CAP),
+ hton16(PPTP_MAX_CHANNELS), hton16(PPTP_FIRMWARE_VERSION),
+ PPTP_HOSTNAME, PPTP_VENDOR
+ };
+ /* fix this packet, if necessary */
+ int idx, rc;
+ idx = get_quirk_index();
+ if (idx != -1 && pptp_fixups[idx].start_ctrl_conn) {
+ if ((rc = pptp_fixups[idx].start_ctrl_conn(&packet)))
+ warn("calling the start_ctrl_conn hook failed (%d)", rc);
+ }
+ if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet)))
+ conn->conn_state = CONN_WAIT_CTL_REPLY;
+ else
+ return NULL; /* could not send initial start request. */
+ }
+ /* Set up interval/keep-alive timer */
+ /* First, register handler for SIGALRM */
+ sigpipe_create();
+ sigpipe_assign(SIGALRM);
+ global.conn = conn;
+ /* Reset event timer */
+ pptp_reset_timer();
+ /* all done. */
+ return conn;
+}
+
+int pptp_conn_established(PPTP_CONN *conn) {
+ return (conn->conn_state == CONN_ESTABLISHED);
+}
+
+/* This currently *only* works for client call requests.
+ * We need to do something else to allocate calls for incoming requests.
+ */
+PPTP_CALL * pptp_call_open(PPTP_CONN * conn, int call_id,pptp_call_cb callback,
+ char *phonenr,int window)
+{
+ PPTP_CALL * call;
+ int idx, rc;
+ /* Send off the call request */
+ struct pptp_out_call_rqst packet = {
+ PPTP_HEADER_CTRL(PPTP_OUT_CALL_RQST),
+ 0,0, /*call_id, sernum */
+ hton32(PPTP_BPS_MIN), hton32(PPTP_BPS_MAX),
+ hton32(PPTP_BEARER_CAP), hton32(PPTP_FRAME_CAP),
+ hton16(window), 0, 0, 0, {0}, {0}
+ };
+ assert(conn && conn->call);
+ assert(conn->conn_state == CONN_ESTABLISHED);
+ /* Assign call id */
+ if (!call_id && !vector_scan(conn->call, 0, PPTP_MAX_CHANNELS - 1, &call_id))
+ /* no more calls available! */
+ return NULL;
+ /* allocate structure. */
+ if ((call = malloc(sizeof(*call))) == NULL) return NULL;
+ /* Initialize call structure */
+ call->call_type = PPTP_CALL_PNS;
+ call->state.pns = PNS_IDLE;
+ call->call_id = (u_int16_t) call_id;
+ call->sernum = conn->call_serial_number++;
+ call->callback = callback;
+ call->closure = NULL;
+ packet.call_id = htons(call->call_id);
+ packet.call_sernum = htons(call->sernum);
+ /* if we have a quirk, build a new packet to fit it */
+ idx = get_quirk_index();
+ if (idx != -1 && pptp_fixups[idx].out_call_rqst_hook) {
+ if ((rc = pptp_fixups[idx].out_call_rqst_hook(&packet)))
+ warn("calling the out_call_rqst hook failed (%d)", rc);
+ }
+ /* fill in the phone number if it was specified */
+ if (phonenr) {
+ strncpy(packet.phone_num, phonenr, sizeof(packet.phone_num));
+ packet.phone_len = strlen(phonenr);
+ if( packet.phone_len > sizeof(packet.phone_num))
+ packet.phone_len = sizeof(packet.phone_num);
+ packet.phone_len = hton16 (packet.phone_len);
+ }
+ if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet))) {
+ pptp_reset_timer();
+ call->state.pns = PNS_WAIT_REPLY;
+ /* and add it to the call vector */
+ vector_insert(conn->call, call_id, call);
+ return call;
+ } else { /* oops, unsuccessful. Deallocate. */
+ free(call);
+ return NULL;
+ }
+}
+
+/*** pptp_call_close **********************************************************/
+void pptp_call_close(PPTP_CONN * conn, PPTP_CALL * call)
+{
+ struct pptp_call_clear_rqst rqst = {
+ PPTP_HEADER_CTRL(PPTP_CALL_CLEAR_RQST), 0, 0
+ };
+ assert(conn && conn->call); assert(call);
+ assert(vector_contains(conn->call, call->call_id));
+ /* haven't thought about PAC yet */
+ assert(call->call_type == PPTP_CALL_PNS);
+ assert(call->state.pns != PNS_IDLE);
+ rqst.call_id = hton16(call->call_id);
+ /* don't check state against WAIT_DISCONNECT... allow multiple disconnect
+ * requests to be made.
+ */
+ pptp_send_ctrl_packet(conn, &rqst, sizeof(rqst));
+ pptp_reset_timer();
+ call->state.pns = PNS_WAIT_DISCONNECT;
+ /* call structure will be freed when we have confirmation of disconnect. */
+}
+
+/*** hard close ***************************************************************/
+void pptp_call_destroy(PPTP_CONN *conn, PPTP_CALL *call)
+{
+ assert(conn && conn->call); assert(call);
+ assert(vector_contains(conn->call, call->call_id));
+ /* notify */
+ if (call->callback != NULL) call->callback(conn, call, CALL_CLOSE_DONE);
+ /* deallocate */
+ vector_remove(conn->call, call->call_id);
+ free(call);
+}
+
+/*** this is a soft close *****************************************************/
+void pptp_conn_close(PPTP_CONN * conn, u_int8_t close_reason)
+{
+ struct pptp_stop_ctrl_conn rqst = {
+ PPTP_HEADER_CTRL(PPTP_STOP_CTRL_CONN_RQST),
+ hton8(close_reason), 0, 0
+ };
+ int i;
+ assert(conn && conn->call);
+ /* avoid repeated close attempts */
+ if (conn->conn_state == CONN_IDLE || conn->conn_state == CONN_WAIT_STOP_REPLY)
+ return;
+ /* close open calls, if any */
+ for (i = 0; i < vector_size(conn->call); i++)
+ pptp_call_close(conn, vector_get_Nth(conn->call, i));
+ /* now close connection */
+ info("Closing PPTP connection");
+ pptp_send_ctrl_packet(conn, &rqst, sizeof(rqst));
+ pptp_reset_timer(); /* wait 60 seconds for reply */
+ conn->conn_state = CONN_WAIT_STOP_REPLY;
+ return;
+}
+
+/*** this is a hard close *****************************************************/
+void pptp_conn_destroy(PPTP_CONN * conn)
+{
+ int i;
+ assert(conn != NULL); assert(conn->call != NULL);
+ /* destroy all open calls */
+ for (i = 0; i < vector_size(conn->call); i++)
+ pptp_call_destroy(conn, vector_get_Nth(conn->call, i));
+ /* notify */
+ if (conn->callback != NULL) conn->callback(conn, CONN_CLOSE_DONE);
+ sigpipe_close();
+ close(conn->inet_sock);
+ /* deallocate */
+ vector_destroy(conn->call);
+ free(conn);
+}
+
+/*** Deal with messages, in a non-blocking manner
+ * Add file descriptors used by pptp to fd_set.
+ */
+void pptp_fd_set(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set,
+ int * max_fd)
+{
+ assert(conn && conn->call);
+ /* Add fd to write_set if there are outstanding writes. */
+ if (conn->write_size > 0)
+ FD_SET(conn->inet_sock, write_set);
+ /* Always add fd to read_set. (always want something to read) */
+ FD_SET(conn->inet_sock, read_set);
+ if (*max_fd < conn->inet_sock) *max_fd = conn->inet_sock;
+ /* Add signal pipe file descriptor to set */
+ int sig_fd = sigpipe_fd();
+ FD_SET(sig_fd, read_set);
+ if (*max_fd < sig_fd) *max_fd = sig_fd;
+}
+
+/*** handle any pptp file descriptors set in fd_set, and clear them ***********/
+int pptp_dispatch(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set)
+{
+ int r = 0;
+ assert(conn && conn->call);
+ /* Check for signals */
+ if (FD_ISSET(sigpipe_fd(), read_set)) {
+ if (sigpipe_read() == SIGALRM) pptp_handle_timer();
+ FD_CLR(sigpipe_fd(), read_set);
+ }
+ /* Check write_set could be set. */
+ if (FD_ISSET(conn->inet_sock, write_set)) {
+ FD_CLR(conn->inet_sock, write_set);
+ if (conn->write_size > 0)
+ r = pptp_write_some(conn);/* write as much as we can without blocking */
+ }
+ /* Check read_set */
+ if (r >= 0 && FD_ISSET(conn->inet_sock, read_set)) {
+ void *buffer; size_t size;
+ FD_CLR(conn->inet_sock, read_set);
+ r = pptp_read_some(conn); /* read as much as we can without blocking */
+ if (r < 0)
+ return r;
+ /* make packets of the buffer, while we can. */
+ while (r >= 0 && pptp_make_packet(conn, &buffer, &size)) {
+ r = pptp_dispatch_packet(conn, buffer, size);
+ free(buffer);
+ }
+ }
+ /* That's all, folks. Simple, eh? */
+ return r;
+}
+
+/*** Non-blocking write *******************************************************/
+int pptp_write_some(PPTP_CONN * conn) {
+ ssize_t retval;
+ assert(conn && conn->call);
+ retval = write(conn->inet_sock, conn->write_buffer, conn->write_size);
+ if (retval < 0) { /* error. */
+ if (errno == EAGAIN || errno == EINTR) {
+ return 0;
+ } else { /* a real error */
+ warn("write error: %s", strerror(errno));
+ return -1;
+ }
+ }
+ assert(retval <= conn->write_size);
+ conn->write_size -= retval;
+ memmove(conn->write_buffer, conn->write_buffer + retval, conn->write_size);
+ ctrlp_rep(conn->write_buffer, retval, 0);
+ return 0;
+}
+
+/*** Non-blocking read ********************************************************/
+int pptp_read_some(PPTP_CONN * conn)
+{
+ ssize_t retval;
+ assert(conn && conn->call);
+ if (conn->read_size == conn->read_alloc) { /* need to alloc more memory */
+ char *new_buffer = realloc(conn->read_buffer,
+ sizeof(*(conn->read_buffer)) * conn->read_alloc * 2);
+ if (new_buffer == NULL) {
+ warn("Out of memory"); return -1;
+ }
+ conn->read_alloc *= 2;
+ conn->read_buffer = new_buffer;
+ }
+ retval = read(conn->inet_sock, conn->read_buffer + conn->read_size,
+ conn->read_alloc - conn->read_size);
+ if (retval == 0) {
+ warn("read returned zero, peer has closed");
+ return -1;
+ }
+ if (retval < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ return 0;
+ else { /* a real error */
+ warn("read error: %s", strerror(errno));
+ return -1;
+ }
+ }
+ conn->read_size += retval;
+ assert(conn->read_size <= conn->read_alloc);
+ return 0;
+}
+
+/*** Packet formation *********************************************************/
+int pptp_make_packet(PPTP_CONN * conn, void **buf, size_t *size)
+{
+ struct pptp_header *header;
+ size_t bad_bytes = 0;
+ assert(conn && conn->call); assert(buf != NULL); assert(size != NULL);
+ /* Give up unless there are at least sizeof(pptp_header) bytes */
+ while ((conn->read_size-bad_bytes) >= sizeof(struct pptp_header)) {
+ /* Throw out bytes until we have a valid header. */
+ header = (struct pptp_header *) (conn->read_buffer + bad_bytes);
+ if (ntoh32(header->magic) != PPTP_MAGIC) goto throwitout;
+ if (ntoh16(header->reserved0) != 0)
+ warn("reserved0 field is not zero! (0x%x) Cisco feature? \n",
+ ntoh16(header->reserved0));
+ if (ntoh16(header->length) < sizeof(struct pptp_header)) goto throwitout;
+ if (ntoh16(header->length) > PPTP_CTRL_SIZE_MAX) goto throwitout;
+ /* well. I guess it's good. Let's see if we've got it all. */
+ if (ntoh16(header->length) > (conn->read_size-bad_bytes))
+ /* nope. Let's wait until we've got it, then. */
+ goto flushbadbytes;
+ /* One last check: */
+ if ((ntoh16(header->pptp_type) == PPTP_MESSAGE_CONTROL) &&
+ (ntoh16(header->length) !=
+ PPTP_CTRL_SIZE(ntoh16(header->ctrl_type))))
+ goto throwitout;
+ /* well, I guess we've got it. */
+ *size = ntoh16(header->length);
+ *buf = malloc(*size);
+ if (*buf == NULL) { warn("Out of memory."); return 0; /* ack! */ }
+ memcpy(*buf, conn->read_buffer + bad_bytes, *size);
+ /* Delete this packet from the read_buffer. */
+ conn->read_size -= (bad_bytes + *size);
+ memmove(conn->read_buffer, conn->read_buffer + bad_bytes + *size,
+ conn->read_size);
+ if (bad_bytes > 0)
+ warn("%lu bad bytes thrown away.", (unsigned long) bad_bytes);
+ return 1;
+throwitout:
+ bad_bytes++;
+ }
+flushbadbytes:
+ /* no more packets. Let's get rid of those bad bytes */
+ conn->read_size -= bad_bytes;
+ memmove(conn->read_buffer, conn->read_buffer + bad_bytes, conn->read_size);
+ if (bad_bytes > 0)
+ warn("%lu bad bytes thrown away.", (unsigned long) bad_bytes);
+ return 0;
+}
+
+/*** pptp_send_ctrl_packet ****************************************************/
+int pptp_send_ctrl_packet(PPTP_CONN * conn, void * buffer, size_t size)
+{
+ assert(conn && conn->call); assert(buffer);
+ if( conn->write_size > 0) pptp_write_some( conn);
+ if( conn->write_size == 0) {
+ ssize_t retval;
+ retval = write(conn->inet_sock, buffer, size);
+ if (retval < 0) { /* error. */
+ if (errno == EAGAIN || errno == EINTR) {
+ /* ignore */;
+ retval = 0;
+ } else { /* a real error */
+ warn("write error: %s", strerror(errno));
+ pptp_conn_destroy(conn); /* shut down fast. */
+ return 0;
+ }
+ }
+ ctrlp_rep( buffer, retval, 0);
+ size -= retval;
+ if( size <= 0) return 1;
+ }
+ /* Shove anything not written into the write buffer */
+ if (conn->write_size + size > conn->write_alloc) { /* need more memory */
+ char *new_buffer = realloc(conn->write_buffer,
+ sizeof(*(conn->write_buffer)) * conn->write_alloc * 2);
+ if (new_buffer == NULL) {
+ warn("Out of memory"); return 0;
+ }
+ conn->write_alloc *= 2;
+ conn->write_buffer = new_buffer;
+ }
+ memcpy(conn->write_buffer + conn->write_size, buffer, size);
+ conn->write_size += size;
+ ctrlp_rep( buffer,size,1);
+ return 1;
+}
+
+/*** Packet Dispatch **********************************************************/
+int pptp_dispatch_packet(PPTP_CONN * conn, void * buffer, size_t size)
+{
+ int r = 0;
+ struct pptp_header *header = (struct pptp_header *)buffer;
+ assert(conn && conn->call); assert(buffer);
+ assert(ntoh32(header->magic) == PPTP_MAGIC);
+ assert(ntoh16(header->length) == size);
+ switch (ntoh16(header->pptp_type)) {
+ case PPTP_MESSAGE_CONTROL:
+ r = ctrlp_disp(conn, buffer, size);
+ break;
+ case PPTP_MESSAGE_MANAGE:
+ /* MANAGEMENT messages aren't even part of the spec right now. */
+ dbglog("PPTP management message received, but not understood.");
+ break;
+ default:
+ dbglog("Unknown PPTP control message type received: %u",
+ (unsigned int) ntoh16(header->pptp_type));
+ break;
+ }
+ return r;
+}
+
+/*** log echo request/replies *************************************************/
+static void logecho( int type)
+{
+ /* hack to stop flooding the log files (the most interesting part is right
+ * after the connection built-up) */
+ if( nlogecho > 0) {
+ dbglog("Echo Re%s received.", type == PPTP_ECHO_RQST ? "quest" :"ply");
+ if( --nlogecho == 0)
+ dbglog("no more Echo Reply/Request packets will be reported.");
+ }
+}
+
+/*** pptp_dispatch_ctrl_packet ************************************************/
+int ctrlp_disp(PPTP_CONN * conn, void * buffer, size_t size)
+{
+ struct pptp_header *header = (struct pptp_header *)buffer;
+ u_int8_t close_reason = PPTP_STOP_NONE;
+ assert(conn && conn->call); assert(buffer);
+ assert(ntoh32(header->magic) == PPTP_MAGIC);
+ assert(ntoh16(header->length) == size);
+ assert(ntoh16(header->pptp_type) == PPTP_MESSAGE_CONTROL);
+ if (size < PPTP_CTRL_SIZE(ntoh16(header->ctrl_type))) {
+ warn("Invalid packet received [type: %d; length: %d].",
+ (int) ntoh16(header->ctrl_type), (int) size);
+ return 0;
+ }
+ switch (ntoh16(header->ctrl_type)) {
+ /* ----------- STANDARD Start-Session MESSAGES ------------ */
+ case PPTP_START_CTRL_CONN_RQST:
+ {
+ struct pptp_start_ctrl_conn *packet =
+ (struct pptp_start_ctrl_conn *) buffer;
+ struct pptp_start_ctrl_conn reply = {
+ PPTP_HEADER_CTRL(PPTP_START_CTRL_CONN_RPLY),
+ hton16(PPTP_VERSION), 0, 0,
+ hton32(PPTP_FRAME_CAP), hton32(PPTP_BEARER_CAP),
+ hton16(PPTP_MAX_CHANNELS), hton16(PPTP_FIRMWARE_VERSION),
+ PPTP_HOSTNAME, PPTP_VENDOR };
+ int idx, rc;
+ dbglog("Received Start Control Connection Request");
+ /* fix this packet, if necessary */
+ idx = get_quirk_index();
+ if (idx != -1 && pptp_fixups[idx].start_ctrl_conn) {
+ if ((rc = pptp_fixups[idx].start_ctrl_conn(&reply)))
+ warn("calling the start_ctrl_conn hook failed (%d)", rc);
+ }
+ if (conn->conn_state == CONN_IDLE) {
+ if (ntoh16(packet->version) < PPTP_VERSION) {
+ /* Can't support this (earlier) PPTP_VERSION */
+ reply.version = packet->version;
+ /* protocol version not supported */
+ reply.result_code = hton8(5);
+ pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+ pptp_reset_timer(); /* give sender a chance for a retry */
+ } else { /* same or greater version */
+ if (pptp_send_ctrl_packet(conn, &reply, sizeof(reply))) {
+ conn->conn_state = CONN_ESTABLISHED;
+ dbglog("server connection ESTABLISHED.");
+ pptp_reset_timer();
+ }
+ }
+ }
+ break;
+ }
+ case PPTP_START_CTRL_CONN_RPLY:
+ {
+ struct pptp_start_ctrl_conn *packet =
+ (struct pptp_start_ctrl_conn *) buffer;
+ dbglog("Received Start Control Connection Reply");
+ if (conn->conn_state == CONN_WAIT_CTL_REPLY) {
+ /* XXX handle collision XXX [see rfc] */
+ if (ntoh16(packet->version) != PPTP_VERSION) {
+ if (conn->callback != NULL)
+ conn->callback(conn, CONN_OPEN_FAIL);
+ close_reason = PPTP_STOP_PROTOCOL;
+ goto pptp_conn_close;
+ }
+ if (ntoh8(packet->result_code) != 1 &&
+ /* J'ai change le if () afin que la connection ne se ferme
+ * pas pour un "rien" :p adel@cybercable.fr -
+ *
+ * Don't close the connection if the result code is zero
+ * (feature found in certain ADSL modems)
+ */
+ ntoh8(packet->result_code) != 0) {
+ dbglog("Negative reply received to our Start Control "
+ "Connection Request");
+ ctrlp_error(packet->result_code, packet->error_code,
+ -1, pptp_start_ctrl_conn_rply,
+ MAX_START_CTRL_CONN_REPLY);
+ if (conn->callback != NULL)
+ conn->callback(conn, CONN_OPEN_FAIL);
+ close_reason = PPTP_STOP_PROTOCOL;
+ goto pptp_conn_close;
+ }
+ conn->conn_state = CONN_ESTABLISHED;
+ /* log session properties */
+ conn->version = ntoh16(packet->version);
+ conn->firmware_rev = ntoh16(packet->firmware_rev);
+ memcpy(conn->hostname, packet->hostname, sizeof(conn->hostname));
+ memcpy(conn->vendor, packet->vendor, sizeof(conn->vendor));
+ pptp_reset_timer(); /* 60 seconds until keep-alive */
+ dbglog("Client connection established.");
+ if (conn->callback != NULL)
+ conn->callback(conn, CONN_OPEN_DONE);
+ } /* else goto pptp_conn_close; */
+ break;
+ }
+ /* ----------- STANDARD Stop-Session MESSAGES ------------ */
+ case PPTP_STOP_CTRL_CONN_RQST:
+ {
+ /* conn_state should be CONN_ESTABLISHED, but it could be
+ * something else */
+ struct pptp_stop_ctrl_conn reply = {
+ PPTP_HEADER_CTRL(PPTP_STOP_CTRL_CONN_RPLY),
+ hton8(1), hton8(PPTP_GENERAL_ERROR_NONE), 0
+ };
+ dbglog("Received Stop Control Connection Request.");
+ if (conn->conn_state == CONN_IDLE) break;
+ if (pptp_send_ctrl_packet(conn, &reply, sizeof(reply))) {
+ if (conn->callback != NULL)
+ conn->callback(conn, CONN_CLOSE_RQST);
+ conn->conn_state = CONN_IDLE;
+ return -1;
+ }
+ break;
+ }
+ case PPTP_STOP_CTRL_CONN_RPLY:
+ {
+ dbglog("Received Stop Control Connection Reply.");
+ /* conn_state should be CONN_WAIT_STOP_REPLY, but it
+ * could be something else */
+ if (conn->conn_state == CONN_IDLE) break;
+ conn->conn_state = CONN_IDLE;
+ return -1;
+ }
+ /* ----------- STANDARD Echo/Keepalive MESSAGES ------------ */
+ case PPTP_ECHO_RPLY:
+ {
+ struct pptp_echo_rply *packet =
+ (struct pptp_echo_rply *) buffer;
+ logecho( PPTP_ECHO_RPLY);
+ if ((conn->ka_state == KA_OUTSTANDING) &&
+ (ntoh32(packet->identifier) == conn->ka_id)) {
+ conn->ka_id++;
+ conn->ka_state = KA_NONE;
+ pptp_reset_timer();
+ }
+ break;
+ }
+ case PPTP_ECHO_RQST:
+ {
+ struct pptp_echo_rqst *packet =
+ (struct pptp_echo_rqst *) buffer;
+ struct pptp_echo_rply reply = {
+ PPTP_HEADER_CTRL(PPTP_ECHO_RPLY),
+ packet->identifier, /* skip hton32(ntoh32(id)) */
+ hton8(1), hton8(PPTP_GENERAL_ERROR_NONE), 0
+ };
+ logecho( PPTP_ECHO_RQST);
+ pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+ pptp_reset_timer();
+ break;
+ }
+ /* ----------- OUTGOING CALL MESSAGES ------------ */
+ case PPTP_OUT_CALL_RQST:
+ {
+ struct pptp_out_call_rqst *packet =
+ (struct pptp_out_call_rqst *)buffer;
+ struct pptp_out_call_rply reply = {
+ PPTP_HEADER_CTRL(PPTP_OUT_CALL_RPLY),
+ 0 /* callid */, packet->call_id, 1, PPTP_GENERAL_ERROR_NONE, 0,
+ hton32(PPTP_CONNECT_SPEED),
+ hton16(PPTP_WINDOW), hton16(PPTP_DELAY), 0
+ };
+ dbglog("Received Outgoing Call Request.");
+ /* XXX PAC: eventually this should make an outgoing call. XXX */
+ reply.result_code = hton8(7); /* outgoing calls verboten */
+ pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+ break;
+ }
+ case PPTP_OUT_CALL_RPLY:
+ {
+ struct pptp_out_call_rply *packet =
+ (struct pptp_out_call_rply *)buffer;
+ PPTP_CALL * call;
+ u_int16_t callid = ntoh16(packet->call_id_peer);
+ dbglog("Received Outgoing Call Reply.");
+ if (!vector_search(conn->call, (int) callid, &call)) {
+ dbglog("PPTP_OUT_CALL_RPLY received for non-existant call: "
+ "peer call ID (us) %d call ID (them) %d.",
+ callid, ntoh16(packet->call_id));
+ break;
+ }
+ if (call->call_type != PPTP_CALL_PNS) {
+ dbglog("Ack! How did this call_type get here?"); /* XXX? */
+ break;
+ }
+ if (call->state.pns != PNS_WAIT_REPLY) {
+ warn("Unexpected(?) Outgoing Call Reply will be ignored.");
+ break;
+ }
+ /* check for errors */
+ if (packet->result_code != 1) {
+ /* An error. Log it verbosely. */
+ dbglog("Our outgoing call request [callid %d] has not been "
+ "accepted.", (int) callid);
+ ctrlp_error(packet->result_code, packet->error_code,
+ packet->cause_code, pptp_out_call_reply_result,
+ MAX_OUT_CALL_REPLY_RESULT);
+ call->state.pns = PNS_IDLE;
+ if (call->callback != NULL)
+ call->callback(conn, call, CALL_OPEN_FAIL);
+ pptp_call_destroy(conn, call);
+ } else {
+ /* connection established */
+ call->state.pns = PNS_ESTABLISHED;
+ call->peer_call_id = ntoh16(packet->call_id);
+ call->speed = ntoh32(packet->speed);
+ pptp_reset_timer();
+ /* call pptp_set_link. unless the user specified a quirk
+ and this quirk has a set_link hook, this is a noop */
+ pptp_set_link(conn, call->peer_call_id);
+ if (call->callback != NULL)
+ call->callback(conn, call, CALL_OPEN_DONE);
+ dbglog("Outgoing call established (call ID %u, peer's "
+ "call ID %u).\n", call->call_id, call->peer_call_id);
+ }
+ break;
+ }
+ /* ----------- INCOMING CALL MESSAGES ------------ */
+ /* XXX write me XXX */
+ /* ----------- CALL CONTROL MESSAGES ------------ */
+ case PPTP_CALL_CLEAR_RQST:
+ {
+ struct pptp_call_clear_rqst *packet =
+ (struct pptp_call_clear_rqst *)buffer;
+ struct pptp_call_clear_ntfy reply = {
+ PPTP_HEADER_CTRL(PPTP_CALL_CLEAR_NTFY), packet->call_id,
+ 1, PPTP_GENERAL_ERROR_NONE, 0, 0, {0}
+ };
+ dbglog("Received Call Clear Request.");
+ if (vector_contains(conn->call, ntoh16(packet->call_id))) {
+ PPTP_CALL * call;
+ vector_search(conn->call, ntoh16(packet->call_id), &call);
+ if (call->callback != NULL)
+ call->callback(conn, call, CALL_CLOSE_RQST);
+ pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+ pptp_call_destroy(conn, call);
+ dbglog("Call closed (RQST) (call id %d)", (int) call->call_id);
+ }
+ break;
+ }
+ case PPTP_CALL_CLEAR_NTFY:
+ {
+ struct pptp_call_clear_ntfy *packet =
+ (struct pptp_call_clear_ntfy *)buffer;
+ dbglog("Call disconnect notification received (call id %d)",
+ ntoh16(packet->call_id));
+ if (vector_contains(conn->call, ntoh16(packet->call_id))) {
+ PPTP_CALL * call;
+ ctrlp_error(packet->result_code, packet->error_code,
+ packet->cause_code, pptp_call_disc_ntfy,
+ MAX_CALL_DISC_NTFY);
+ vector_search(conn->call, ntoh16(packet->call_id), &call);
+ pptp_call_destroy(conn, call);
+ }
+ /* XXX we could log call stats here XXX */
+ /* XXX not all servers send this XXX */
+ break;
+ }
+ case PPTP_SET_LINK_INFO:
+ {
+ /* I HAVE NO CLUE WHAT TO DO IF send_accm IS NOT 0! */
+ /* this is really dealt with in the HDLC deencapsulation, anyway. */
+ struct pptp_set_link_info *packet =
+ (struct pptp_set_link_info *)buffer;
+ /* log it. */
+ dbglog("PPTP_SET_LINK_INFO received from peer_callid %u",
+ (unsigned int) ntoh16(packet->call_id_peer));
+ dbglog(" send_accm is %08lX, recv_accm is %08lX",
+ (unsigned long) ntoh32(packet->send_accm),
+ (unsigned long) ntoh32(packet->recv_accm));
+ if (!(ntoh32(packet->send_accm) == 0 &&
+ ntoh32(packet->recv_accm) == 0))
+ warn("Non-zero Async Control Character Maps are not supported!");
+ break;
+ }
+ default:
+ dbglog("Unrecognized Packet %d received.",
+ (int) ntoh16(((struct pptp_header *)buffer)->ctrl_type));
+ /* goto pptp_conn_close; */
+ break;
+ }
+ return 0;
+pptp_conn_close:
+ warn("pptp_conn_close(%d)", (int) close_reason);
+ pptp_conn_close(conn, close_reason);
+ return 0;
+}
+
+/*** pptp_set_link **************************************************************/
+void pptp_set_link(PPTP_CONN* conn, int peer_call_id)
+{
+ int idx, rc;
+ /* if we need to send a set_link packet because of buggy
+ hardware or pptp server, do it now */
+ if ((idx = get_quirk_index()) != -1 && pptp_fixups[idx].set_link_hook) {
+ struct pptp_set_link_info packet;
+ if ((rc = pptp_fixups[idx].set_link_hook(&packet, peer_call_id)))
+ warn("calling the set_link hook failed (%d)", rc);
+ if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet))) {
+ pptp_reset_timer();
+ }
+ }
+}
+
+/*** Get info from call structure *********************************************/
+/* NOTE: The peer_call_id is undefined until we get a server response. */
+void pptp_call_get_ids(PPTP_CONN * conn, PPTP_CALL * call,
+ u_int16_t * call_id, u_int16_t * peer_call_id)
+{
+ assert(conn != NULL); assert(call != NULL);
+ *call_id = call->call_id;
+ *peer_call_id = call->peer_call_id;
+}
+
+/*** pptp_call_closure_put ****************************************************/
+void pptp_call_closure_put(PPTP_CONN * conn, PPTP_CALL * call, void *cl)
+{
+ assert(conn != NULL); assert(call != NULL);
+ call->closure = cl;
+}
+
+/*** pptp_call_closure_get ****************************************************/
+void * pptp_call_closure_get(PPTP_CONN * conn, PPTP_CALL * call)
+{
+ assert(conn != NULL); assert(call != NULL);
+ return call->closure;
+}
+
+/*** pptp_conn_closure_put ****************************************************/
+void pptp_conn_closure_put(PPTP_CONN * conn, void *cl)
+{
+ assert(conn != NULL);
+ conn->closure = cl;
+}
+
+/*** pptp_conn_closure_get ****************************************************/
+void * pptp_conn_closure_get(PPTP_CONN * conn)
+{
+ assert(conn != NULL);
+ return conn->closure;
+}
+
+/*** Reset keep-alive timer ***************************************************/
+static void pptp_reset_timer(void)
+{
+ const struct itimerval tv = { { 0, 0 }, /* stop on time-out */
+ { idle_wait, 0 } };
+ if (idle_wait) setitimer(ITIMER_REAL, &tv, NULL);
+}
+
+
+/*** Handle keep-alive timer **************************************************/
+static void pptp_handle_timer()
+{
+ int i;
+ /* "Keep Alives and Timers, 1": check connection state */
+ if (global.conn->conn_state != CONN_ESTABLISHED) {
+ if (global.conn->conn_state == CONN_WAIT_STOP_REPLY)
+ /* hard close. */
+ pptp_conn_destroy(global.conn);
+ else /* soft close */
+ pptp_conn_close(global.conn, PPTP_STOP_NONE);
+ }
+ /* "Keep Alives and Timers, 2": check echo status */
+ if (global.conn->ka_state == KA_OUTSTANDING) {
+ /* no response to keep-alive */
+ info("closing control connection due to missing echo reply");
+ pptp_conn_close(global.conn, PPTP_STOP_NONE);
+ } else { /* ka_state == NONE */ /* send keep-alive */
+ struct pptp_echo_rqst rqst = {
+ PPTP_HEADER_CTRL(PPTP_ECHO_RQST), hton32(global.conn->ka_id) };
+ pptp_send_ctrl_packet(global.conn, &rqst, sizeof(rqst));
+ global.conn->ka_state = KA_OUTSTANDING;
+ }
+ /* check incoming/outgoing call states for !IDLE && !ESTABLISHED */
+ for (i = 0; i < vector_size(global.conn->call); i++) {
+ PPTP_CALL * call = vector_get_Nth(global.conn->call, i);
+ if (call->call_type == PPTP_CALL_PNS) {
+ if (call->state.pns == PNS_WAIT_REPLY) {
+ /* send close request */
+ pptp_call_close(global.conn, call);
+ assert(call->state.pns == PNS_WAIT_DISCONNECT);
+ } else if (call->state.pns == PNS_WAIT_DISCONNECT) {
+ /* hard-close the call */
+ pptp_call_destroy(global.conn, call);
+ }
+ } else if (call->call_type == PPTP_CALL_PAC) {
+ if (call->state.pac == PAC_WAIT_REPLY) {
+ /* XXX FIXME -- drop the PAC connection XXX */
+ } else if (call->state.pac == PAC_WAIT_CS_ANS) {
+ /* XXX FIXME -- drop the PAC connection XXX */
+ }
+ }
+ }
+ pptp_reset_timer();
+}
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_ctrl.h
@@ -0,0 +1,57 @@
+/* pptp_ctrl.h ... handle PPTP control connection.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_ctrl.h,v 1.5 2004/11/09 01:42:32 quozl Exp $
+ */
+
+#ifndef INC_PPTP_CTRL_H
+#define INC_PPTP_CTRL_H
+#include <sys/types.h>
+
+typedef struct PPTP_CONN PPTP_CONN;
+typedef struct PPTP_CALL PPTP_CALL;
+
+enum call_state { CALL_OPEN_RQST, CALL_OPEN_DONE, CALL_OPEN_FAIL,
+ CALL_CLOSE_RQST, CALL_CLOSE_DONE };
+enum conn_state { CONN_OPEN_RQST, CONN_OPEN_DONE, CONN_OPEN_FAIL,
+ CONN_CLOSE_RQST, CONN_CLOSE_DONE };
+
+typedef void (*pptp_call_cb)(PPTP_CONN*, PPTP_CALL*, enum call_state);
+typedef void (*pptp_conn_cb)(PPTP_CONN*, enum conn_state);
+
+/* if 'isclient' is true, then will send 'conn open' packet to other host.
+ * not necessary if this is being opened by a server process after
+ * receiving a conn_open packet from client.
+ */
+PPTP_CONN * pptp_conn_open(int inet_sock, int isclient,
+ pptp_conn_cb callback);
+PPTP_CALL * pptp_call_open(PPTP_CONN * conn, int call_id,
+ pptp_call_cb callback, char *phonenr,int window);
+int pptp_conn_established(PPTP_CONN * conn);
+/* soft close. Will callback on completion. */
+void pptp_call_close(PPTP_CONN * conn, PPTP_CALL * call);
+/* hard close. */
+void pptp_call_destroy(PPTP_CONN *conn, PPTP_CALL *call);
+/* soft close. Will callback on completion. */
+void pptp_conn_close(PPTP_CONN * conn, u_int8_t close_reason);
+/* hard close */
+void pptp_conn_destroy(PPTP_CONN * conn);
+
+/* Add file descriptors used by pptp to fd_set. */
+void pptp_fd_set(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set, int *max_fd);
+/* handle any pptp file descriptors set in fd_set, and clear them */
+int pptp_dispatch(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set);
+
+/* Get info about connection, call */
+void pptp_call_get_ids(PPTP_CONN * conn, PPTP_CALL * call,
+ u_int16_t * call_id, u_int16_t * peer_call_id);
+/* Arbitrary user data about this call/connection.
+ * It is the caller's responsibility to free this data before calling
+ * pptp_call|conn_close()
+ */
+void * pptp_conn_closure_get(PPTP_CONN * conn);
+void pptp_conn_closure_put(PPTP_CONN * conn, void *cl);
+void * pptp_call_closure_get(PPTP_CONN * conn, PPTP_CALL * call);
+void pptp_call_closure_put(PPTP_CONN * conn, PPTP_CALL * call, void *cl);
+
+#endif /* INC_PPTP_CTRL_H */
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_msg.h
@@ -0,0 +1,303 @@
+/* pptp.h: packet structures and magic constants for the PPTP protocol
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_msg.h,v 1.3 2003/02/15 10:37:21 quozl Exp $
+ */
+
+#ifndef INC_PPTP_H
+#define INC_PPTP_H
+
+/* Grab definitions of int16, int32, etc. */
+#include <sys/types.h>
+/* define "portable" htons, etc. */
+#define hton8(x) (x)
+#define ntoh8(x) (x)
+#define hton16(x) htons(x)
+#define ntoh16(x) ntohs(x)
+#define hton32(x) htonl(x)
+#define ntoh32(x) ntohl(x)
+
+/* PPTP magic numbers: ----------------------------------------- */
+
+#define PPTP_MAGIC 0x1A2B3C4D /* Magic cookie for PPTP datagrams */
+#define PPTP_PORT 1723 /* PPTP TCP port number */
+#define PPTP_PROTO 47 /* PPTP IP protocol number */
+
+/* Control Connection Message Types: --------------------------- */
+
+#define PPTP_MESSAGE_CONTROL 1
+#define PPTP_MESSAGE_MANAGE 2
+
+/* Control Message Types: -------------------------------------- */
+
+/* (Control Connection Management) */
+#define PPTP_START_CTRL_CONN_RQST 1
+#define PPTP_START_CTRL_CONN_RPLY 2
+#define PPTP_STOP_CTRL_CONN_RQST 3
+#define PPTP_STOP_CTRL_CONN_RPLY 4
+#define PPTP_ECHO_RQST 5
+#define PPTP_ECHO_RPLY 6
+
+/* (Call Management) */
+#define PPTP_OUT_CALL_RQST 7
+#define PPTP_OUT_CALL_RPLY 8
+#define PPTP_IN_CALL_RQST 9
+#define PPTP_IN_CALL_RPLY 10
+#define PPTP_IN_CALL_CONNECT 11
+#define PPTP_CALL_CLEAR_RQST 12
+#define PPTP_CALL_CLEAR_NTFY 13
+
+/* (Error Reporting) */
+#define PPTP_WAN_ERR_NTFY 14
+
+/* (PPP Session Control) */
+#define PPTP_SET_LINK_INFO 15
+
+/* PPTP version information: --------------------------------------*/
+#define PPTP_VERSION_STRING "1.00"
+#define PPTP_VERSION 0x100
+#define PPTP_FIRMWARE_STRING "0.01"
+#define PPTP_FIRMWARE_VERSION 0x001
+
+/* PPTP capabilities: ---------------------------------------------*/
+
+/* (Framing capabilities for msg sender) */
+#define PPTP_FRAME_ASYNC 1
+#define PPTP_FRAME_SYNC 2
+#define PPTP_FRAME_ANY 3
+
+/* (Bearer capabilities for msg sender) */
+#define PPTP_BEARER_ANALOG 1
+#define PPTP_BEARER_DIGITAL 2
+#define PPTP_BEARER_ANY 3
+
+#define PPTP_RESULT_GENERAL_ERROR 2
+
+/* (Reasons to close a connection) */
+#define PPTP_STOP_NONE 1 /* no good reason */
+#define PPTP_STOP_PROTOCOL 2 /* can't support peer's protocol version */
+#define PPTP_STOP_LOCAL_SHUTDOWN 3 /* requester is being shut down */
+
+/* PPTP datagram structures (all data in network byte order): ----------*/
+
+struct pptp_header {
+ u_int16_t length; /* message length in octets, including header */
+ u_int16_t pptp_type; /* PPTP message type. 1 for control message. */
+ u_int32_t magic; /* this should be PPTP_MAGIC. */
+ u_int16_t ctrl_type; /* Control message type (0-15) */
+ u_int16_t reserved0; /* reserved. MUST BE ZERO. */
+};
+
+struct pptp_start_ctrl_conn { /* for control message types 1 and 2 */
+ struct pptp_header header;
+
+ u_int16_t version; /* PPTP protocol version. = PPTP_VERSION */
+ u_int8_t result_code; /* these two fields should be zero on rqst msg*/
+ u_int8_t error_code; /* 0 unless result_code==2 (General Error) */
+ u_int32_t framing_cap; /* Framing capabilities */
+ u_int32_t bearer_cap; /* Bearer Capabilities */
+ u_int16_t max_channels; /* Maximum Channels (=0 for PNS, PAC ignores) */
+ u_int16_t firmware_rev; /* Firmware or Software Revision */
+ u_int8_t hostname[64]; /* Host Name (64 octets, zero terminated) */
+ u_int8_t vendor[64]; /* Vendor string (64 octets, zero term.) */
+ /* MS says that end of hostname/vendor fields should be filled with */
+ /* octets of value 0, but Win95 PPTP driver doesn't do this. */
+};
+
+struct pptp_stop_ctrl_conn { /* for control message types 3 and 4 */
+ struct pptp_header header;
+
+ u_int8_t reason_result; /* reason for rqst, result for rply */
+ u_int8_t error_code; /* MUST be 0, unless rply result==2 (general err)*/
+ u_int16_t reserved1; /* MUST be 0 */
+};
+
+struct pptp_echo_rqst { /* for control message type 5 */
+ struct pptp_header header;
+ u_int32_t identifier; /* arbitrary value set by sender which is used */
+ /* to match up reply and request */
+};
+
+struct pptp_echo_rply { /* for control message type 6 */
+ struct pptp_header header;
+ u_int32_t identifier; /* should correspond to id of rqst */
+ u_int8_t result_code;
+ u_int8_t error_code; /* =0, unless result_code==2 (general error) */
+ u_int16_t reserved1; /* MUST BE ZERO */
+};
+
+struct pptp_out_call_rqst { /* for control message type 7 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (unique id used to multiplex data) */
+ u_int16_t call_sernum; /* Call Serial Number (used for logging) */
+ u_int32_t bps_min; /* Minimum BPS (lowest acceptable line speed) */
+ u_int32_t bps_max; /* Maximum BPS (highest acceptable line speed) */
+ u_int32_t bearer; /* Bearer type */
+ u_int32_t framing; /* Framing type */
+ u_int16_t recv_size; /* Recv. Window Size (no. of buffered packets) */
+ u_int16_t delay; /* Packet Processing Delay (in 1/10 sec) */
+ u_int16_t phone_len; /* Phone Number Length (num. of valid digits) */
+ u_int16_t reserved1; /* MUST BE ZERO */
+ u_int8_t phone_num[64]; /* Phone Number (64 octets, null term.) */
+ u_int8_t subaddress[64]; /* Subaddress (64 octets, null term.) */
+};
+
+struct pptp_out_call_rply { /* for control message type 8 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (used to multiplex data over tunnel)*/
+ u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+ u_int8_t result_code; /* Result Code (1 is no errors) */
+ u_int8_t error_code; /* Error Code (=0 unless result_code==2) */
+ u_int16_t cause_code; /* Cause Code (addt'l failure information) */
+ u_int32_t speed; /* Connect Speed (in BPS) */
+ u_int16_t recv_size; /* Recv. Window Size (no. of buffered packets) */
+ u_int16_t delay; /* Packet Processing Delay (in 1/10 sec) */
+ u_int32_t channel; /* Physical Channel ID (for logging) */
+};
+
+struct pptp_in_call_rqst { /* for control message type 9 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (unique id used to multiplex data) */
+ u_int16_t call_sernum; /* Call Serial Number (used for logging) */
+ u_int32_t bearer; /* Bearer type */
+ u_int32_t channel; /* Physical Channel ID (for logging) */
+ u_int16_t dialed_len; /* Dialed Number Length (# of valid digits) */
+ u_int16_t dialing_len; /* Dialing Number Length (# of valid digits) */
+ u_int8_t dialed_num[64]; /* Dialed Number (64 octets, zero term.) */
+ u_int8_t dialing_num[64]; /* Dialing Number (64 octets, zero term.) */
+ u_int8_t subaddress[64]; /* Subaddress (64 octets, zero term.) */
+};
+
+struct pptp_in_call_rply { /* for control message type 10 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (used to multiplex data over tunnel)*/
+ u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+ u_int8_t result_code; /* Result Code (1 is no errors) */
+ u_int8_t error_code; /* Error Code (=0 unless result_code==2) */
+ u_int16_t recv_size; /* Recv. Window Size (no. of buffered packets) */
+ u_int16_t delay; /* Packet Processing Delay (in 1/10 sec) */
+ u_int16_t reserved1; /* MUST BE ZERO */
+};
+
+struct pptp_in_call_connect { /* for control message type 11 */
+ struct pptp_header header;
+ u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+ u_int16_t reserved1; /* MUST BE ZERO */
+ u_int32_t speed; /* Connect Speed (in BPS) */
+ u_int16_t recv_size; /* Recv. Window Size (no. of buffered packets) */
+ u_int16_t delay; /* Packet Processing Delay (in 1/10 sec) */
+ u_int32_t framing; /* Framing type */
+};
+
+struct pptp_call_clear_rqst { /* for control message type 12 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (used to multiplex data over tunnel)*/
+ u_int16_t reserved1; /* MUST BE ZERO */
+};
+
+struct pptp_call_clear_ntfy { /* for control message type 13 */
+ struct pptp_header header;
+ u_int16_t call_id; /* Call ID (used to multiplex data over tunnel)*/
+ u_int8_t result_code; /* Result Code */
+ u_int8_t error_code; /* Error Code (=0 unless result_code==2) */
+ u_int16_t cause_code; /* Cause Code (for ISDN, is Q.931 cause code) */
+ u_int16_t reserved1; /* MUST BE ZERO */
+ u_int8_t call_stats[128]; /* Call Statistics: 128 octets, ascii, 0-term */
+};
+
+struct pptp_wan_err_ntfy { /* for control message type 14 */
+ struct pptp_header header;
+ u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+ u_int16_t reserved1; /* MUST BE ZERO */
+ u_int32_t crc_errors; /* CRC errors */
+ u_int32_t frame_errors; /* Framing errors */
+ u_int32_t hard_errors; /* Hardware overruns */
+ u_int32_t buff_errors; /* Buffer overruns */
+ u_int32_t time_errors; /* Time-out errors */
+ u_int32_t align_errors; /* Alignment errors */
+};
+
+struct pptp_set_link_info { /* for control message type 15 */
+ struct pptp_header header;
+ u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst) */
+ u_int16_t reserved1; /* MUST BE ZERO */
+ u_int32_t send_accm; /* Send ACCM (for PPP packets; default 0xFFFFFFFF)*/
+ u_int32_t recv_accm; /* Receive ACCM (for PPP pack.;default 0xFFFFFFFF)*/
+};
+
+/* helpful #defines: -------------------------------------------- */
+#define pptp_isvalid_ctrl(header, type, length) \
+ (!( ( ntoh16(((struct pptp_header *)header)->length) < (length) ) || \
+ ( ntoh16(((struct pptp_header *)header)->pptp_type) !=(type) ) || \
+ ( ntoh32(((struct pptp_header *)header)->magic) !=PPTP_MAGIC) || \
+ ( ntoh16(((struct pptp_header *)header)->ctrl_type) > PPTP_SET_LINK_INFO) || \
+ ( ntoh16(((struct pptp_header *)header)->reserved0) !=0 ) ))
+
+#define PPTP_HEADER_CTRL(type) \
+{ hton16(PPTP_CTRL_SIZE(type)), \
+ hton16(PPTP_MESSAGE_CONTROL), \
+ hton32(PPTP_MAGIC), \
+ hton16(type), 0 }
+
+#define PPTP_CTRL_SIZE(type) ( \
+(type==PPTP_START_CTRL_CONN_RQST)?sizeof(struct pptp_start_ctrl_conn): \
+(type==PPTP_START_CTRL_CONN_RPLY)?sizeof(struct pptp_start_ctrl_conn): \
+(type==PPTP_STOP_CTRL_CONN_RQST )?sizeof(struct pptp_stop_ctrl_conn): \
+(type==PPTP_STOP_CTRL_CONN_RPLY )?sizeof(struct pptp_stop_ctrl_conn): \
+(type==PPTP_ECHO_RQST )?sizeof(struct pptp_echo_rqst): \
+(type==PPTP_ECHO_RPLY )?sizeof(struct pptp_echo_rply): \
+(type==PPTP_OUT_CALL_RQST )?sizeof(struct pptp_out_call_rqst): \
+(type==PPTP_OUT_CALL_RPLY )?sizeof(struct pptp_out_call_rply): \
+(type==PPTP_IN_CALL_RQST )?sizeof(struct pptp_in_call_rqst): \
+(type==PPTP_IN_CALL_RPLY )?sizeof(struct pptp_in_call_rply): \
+(type==PPTP_IN_CALL_CONNECT )?sizeof(struct pptp_in_call_connect): \
+(type==PPTP_CALL_CLEAR_RQST )?sizeof(struct pptp_call_clear_rqst): \
+(type==PPTP_CALL_CLEAR_NTFY )?sizeof(struct pptp_call_clear_ntfy): \
+(type==PPTP_WAN_ERR_NTFY )?sizeof(struct pptp_wan_err_ntfy): \
+(type==PPTP_SET_LINK_INFO )?sizeof(struct pptp_set_link_info): \
+0)
+#define max(a,b) (((a)>(b))?(a):(b))
+#define PPTP_CTRL_SIZE_MAX ( \
+max(sizeof(struct pptp_start_ctrl_conn), \
+max(sizeof(struct pptp_echo_rqst), \
+max(sizeof(struct pptp_echo_rply), \
+max(sizeof(struct pptp_out_call_rqst), \
+max(sizeof(struct pptp_out_call_rply), \
+max(sizeof(struct pptp_in_call_rqst), \
+max(sizeof(struct pptp_in_call_rply), \
+max(sizeof(struct pptp_in_call_connect), \
+max(sizeof(struct pptp_call_clear_rqst), \
+max(sizeof(struct pptp_call_clear_ntfy), \
+max(sizeof(struct pptp_wan_err_ntfy), \
+max(sizeof(struct pptp_set_link_info), 0)))))))))))))
+
+
+/* gre header structure: -------------------------------------------- */
+
+#define PPTP_GRE_PROTO 0x880B
+#define PPTP_GRE_VER 0x1
+
+#define PPTP_GRE_FLAG_C 0x80
+#define PPTP_GRE_FLAG_R 0x40
+#define PPTP_GRE_FLAG_K 0x20
+#define PPTP_GRE_FLAG_S 0x10
+#define PPTP_GRE_FLAG_A 0x80
+
+#define PPTP_GRE_IS_C(f) ((f)&PPTP_GRE_FLAG_C)
+#define PPTP_GRE_IS_R(f) ((f)&PPTP_GRE_FLAG_R)
+#define PPTP_GRE_IS_K(f) ((f)&PPTP_GRE_FLAG_K)
+#define PPTP_GRE_IS_S(f) ((f)&PPTP_GRE_FLAG_S)
+#define PPTP_GRE_IS_A(f) ((f)&PPTP_GRE_FLAG_A)
+
+struct pptp_gre_header {
+ u_int8_t flags; /* bitfield */
+ u_int8_t ver; /* should be PPTP_GRE_VER (enhanced GRE) */
+ u_int16_t protocol; /* should be PPTP_GRE_PROTO (ppp-encaps) */
+ u_int16_t payload_len; /* size of ppp payload, not inc. gre header */
+ u_int16_t call_id; /* peer's call_id for this session */
+ u_int32_t seq; /* sequence number. Present if S==1 */
+ u_int32_t ack; /* seq number of highest packet recieved by */
+ /* sender in this session */
+};
+
+#endif /* INC_PPTP_H */
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_options.h
@@ -0,0 +1,41 @@
+/* pptp_options.h ...... various constants used in the PPTP protocol.
+ * #define STANDARD to emulate NT 4.0 exactly.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_options.h,v 1.3 2004/11/09 01:42:32 quozl Exp $
+ */
+
+#ifndef INC_PPTP_OPTIONS_H
+#define INC_PPTP_OPTIONS_H
+
+#undef PPTP_FIRMWARE_STRING
+#undef PPTP_FIRMWARE_VERSION
+#define PPTP_BUF_MAX 65536
+#define PPTP_TIMEOUT 60 /* seconds */
+extern int idle_wait;
+extern int max_echo_wait;
+#define PPTP_CONNECT_SPEED 1000000000
+#define PPTP_WINDOW 3
+#define PPTP_DELAY 0
+#define PPTP_BPS_MIN 2400
+#define PPTP_BPS_MAX 1000000000
+
+#ifndef STANDARD
+#define PPTP_MAX_CHANNELS 65535
+#define PPTP_FIRMWARE_STRING "0.01"
+#define PPTP_FIRMWARE_VERSION 0x001
+#define PPTP_HOSTNAME {'l','o','c','a','l',0}
+#define PPTP_VENDOR {'c','a','n','a','n','i','a','n',0}
+#define PPTP_FRAME_CAP PPTP_FRAME_ANY
+#define PPTP_BEARER_CAP PPTP_BEARER_ANY
+#else
+#define PPTP_MAX_CHANNELS 5
+#define PPTP_FIRMWARE_STRING "0.01"
+#define PPTP_FIRMWARE_VERSION 0
+#define PPTP_HOSTNAME {'l','o','c','a','l',0}
+#define PPTP_VENDOR {'N','T',0}
+#define PPTP_FRAME_CAP 2
+#define PPTP_BEARER_CAP 1
+#endif
+
+#endif /* INC_PPTP_OPTIONS_H */
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_quirks.c
@@ -0,0 +1,54 @@
+/* pptp_quirks.c ...... various options to fix quirks found in buggy adsl modems
+ * mulix <mulix@actcom.co.il>
+ *
+ * $Id: pptp_quirks.c,v 1.2 2001/11/23 03:42:51 quozl Exp $
+ */
+
+#include <string.h>
+#include "orckit_quirks.h"
+#include "pptp_quirks.h"
+
+static int quirk_index = -1;
+
+struct pptp_fixup pptp_fixups[] = {
+ {BEZEQ_ISRAEL, ORCKIT, ORCKIT_ATUR3,
+ orckit_atur3_build_hook,
+ orckit_atur3_start_ctrl_conn_hook,
+ orckit_atur3_set_link_hook}
+};
+
+static int fixups_sz = sizeof(pptp_fixups)/sizeof(pptp_fixups[0]);
+
+/* return 0 on success, non 0 otherwise */
+int set_quirk_index(int index)
+{
+ if (index >= 0 && index < fixups_sz) {
+ quirk_index = index;
+ return 0;
+ }
+
+ return -1;
+}
+
+int get_quirk_index()
+{
+ return quirk_index;
+}
+
+/* return the index for this isp in the quirks table, -1 if not found */
+int find_quirk(const char* isp_name)
+{
+ int i = 0;
+ if (isp_name) {
+ while (i < fixups_sz && pptp_fixups[i].isp) {
+ if (!strcmp(pptp_fixups[i].isp, isp_name)) {
+ return i;
+ }
+ ++i;
+ }
+ }
+
+ return -1;
+}
+
+
--- /dev/null
+++ b/pppd/plugins/pptp/pptp_quirks.h
@@ -0,0 +1,59 @@
+/* pptp_quirks.h ...... various options to fix quirks found in buggy adsl modems
+ * mulix <mulix@actcom.co.il>
+ *
+ * $Id: pptp_quirks.h,v 1.1 2001/11/20 06:30:10 quozl Exp $
+ */
+
+#ifndef INC_PPTP_QUIRKS_H
+#define INC_PPTP_QUIRKS_H
+
+/* isp defs - correspond to slots in the fixups table */
+#define BEZEQ_ISRAEL "BEZEQ_ISRAEL"
+
+/* vendor defs */
+
+#define ORCKIT 1
+#define ALCATEL 2
+
+/* device defs */
+
+#define ORCKIT_ATUR2 1
+#define ORCKIT_ATUR3 2
+
+#include "pptp_msg.h"
+#include "pptp_ctrl.h"
+
+struct pptp_fixup {
+ const char* isp; /* which isp? e.g. Bezeq in Israel */
+ int vendor; /* which vendor? e.g. Orckit */
+ int device; /* which device? e.g. Orckit Atur3 */
+
+ /* use this hook to build your own out call request packet */
+ int (*out_call_rqst_hook)(struct pptp_out_call_rqst* packet);
+
+ /* use this hook to build your own start control connection packet */
+ /* note that this hook is called from two different places, depending
+ on whether this is a request or reply */
+ int (*start_ctrl_conn)(struct pptp_start_ctrl_conn* packet);
+
+ /* use this hook if you need to send a 'set_link' packet once
+ the connection is established */
+ int (*set_link_hook)(struct pptp_set_link_info* packet,
+ int peer_call_id);
+};
+
+extern struct pptp_fixup pptp_fixups[];
+
+/* find the index for this isp in the quirks table */
+/* return the index on success, -1 if not found */
+int find_quirk(const char* isp_name);
+
+/* set the global quirk index. return 0 on success, non 0 otherwise */
+int set_quirk_index(int index);
+
+/* get the global quirk index. return the index on success,
+ -1 if no quirk is defined */
+int get_quirk_index();
+
+
+#endif /* INC_PPTP_QUIRKS_H */
--- /dev/null
+++ b/pppd/plugins/pptp/util.c
@@ -0,0 +1,109 @@
+/* util.c ....... error message utilities.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: util.c,v 1.11 2005/08/22 00:49:48 quozl Exp $
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "util.h"
+
+#define MAKE_STRING(label) \
+va_list ap; \
+char buf[256], string[256]; \
+va_start(ap, format); \
+vsnprintf(buf, sizeof(buf), format, ap); \
+snprintf(string, sizeof(string), "%s %s[%s:%s:%d]: %s", \
+ log_string, label, func, file, line, buf); \
+va_end(ap)
+
+/*** connect a file to a file descriptor **************************************/
+int file2fd(const char *path, const char *mode, int fd)
+{
+ int ok = 0;
+ FILE *file = NULL;
+ file = fopen(path, mode);
+ if (file != NULL && dup2(fileno(file), fd) != -1)
+ ok = 1;
+ if (file) fclose(file);
+ return ok;
+}
+
+/* signal to pipe delivery implementation */
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <string.h>
+
+/* pipe private to process */
+static int sigpipe[2];
+
+/* create a signal pipe, returns 0 for success, -1 with errno for failure */
+int sigpipe_create()
+{
+ int rc;
+
+ rc = pipe(sigpipe);
+ if (rc < 0) return rc;
+
+ fcntl(sigpipe[0], F_SETFD, FD_CLOEXEC);
+ fcntl(sigpipe[1], F_SETFD, FD_CLOEXEC);
+
+#ifdef O_NONBLOCK
+#define FLAG_TO_SET O_NONBLOCK
+#else
+#ifdef SYSV
+#define FLAG_TO_SET O_NDELAY
+#else /* BSD */
+#define FLAG_TO_SET FNDELAY
+#endif
+#endif
+
+ rc = fcntl(sigpipe[1], F_GETFL);
+ if (rc != -1)
+ rc = fcntl(sigpipe[1], F_SETFL, rc | FLAG_TO_SET);
+ if (rc < 0) return rc;
+ return 0;
+#undef FLAG_TO_SET
+}
+
+/* generic handler for signals, writes signal number to pipe */
+void sigpipe_handler(int signum)
+{
+ write(sigpipe[1], &signum, sizeof(signum));
+ signal(signum, sigpipe_handler);
+}
+
+/* assign a signal number to the pipe */
+void sigpipe_assign(int signum)
+{
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = sigpipe_handler;
+ sigaction(signum, &sa, NULL);
+}
+
+/* return the signal pipe read file descriptor for select(2) */
+int sigpipe_fd()
+{
+ return sigpipe[0];
+}
+
+/* read and return the pending signal from the pipe */
+int sigpipe_read()
+{
+ int signum;
+ read(sigpipe[0], &signum, sizeof(signum));
+ return signum;
+}
+
+void sigpipe_close()
+{
+ close(sigpipe[0]);
+ close(sigpipe[1]);
+}
+
--- /dev/null
+++ b/pppd/plugins/pptp/util.h
@@ -0,0 +1,31 @@
+/* util.h ....... error message utilities.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: util.h,v 1.6 2005/03/10 01:18:20 quozl Exp $
+ */
+
+#ifndef INC_UTIL_H
+#define INC_UTIL_H
+
+int file2fd(const char *path, const char *mode, int fd);
+
+/* signal to pipe delivery implementation */
+
+/* create a signal pipe, returns 0 for success, -1 with errno for failure */
+int sigpipe_create();
+
+/* generic handler for signals, writes signal number to pipe */
+void sigpipe_handler(int signum);
+
+/* assign a signal number to the pipe */
+void sigpipe_assign(int signum);
+
+/* return the signal pipe read file descriptor for select(2) */
+int sigpipe_fd();
+
+/* read and return the pending signal from the pipe */
+int sigpipe_read();
+
+void sigpipe_close();
+
+#endif /* INC_UTIL_H */
--- /dev/null
+++ b/pppd/plugins/pptp/vector.c
@@ -0,0 +1,209 @@
+/* vector.c ..... store a vector of PPTP_CALL information and search it
+ * efficiently.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: vector.c,v 1.3 2003/06/17 10:12:55 reink Exp $
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "pptp_ctrl.h"
+#include "vector.h"
+/* #define VECTOR_DEBUG */
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+struct vector_item {
+ int key;
+ PPTP_CALL *call;
+};
+
+struct vector_struct {
+ struct vector_item *item;
+ int size;
+ int alloc;
+#ifdef VECTOR_DEBUG
+ int key_max;
+#endif
+};
+
+static struct vector_item *binary_search(VECTOR *v, int key);
+
+/*** vector_create ************************************************************/
+VECTOR *vector_create()
+{
+ const int INITIAL_SIZE = 4;
+
+ VECTOR *v = malloc(sizeof(*v));
+ if (v == NULL) return v;
+
+ v->size = 0;
+ v->alloc = INITIAL_SIZE;
+ v->item = malloc(sizeof(*(v->item)) * (v->alloc));
+#ifdef VECTOR_DEBUG
+ v->key_max = -1;
+#endif
+ if (v->item == NULL) { free(v); return NULL; }
+ else return v;
+}
+
+/*** vector_destroy ***********************************************************/
+void vector_destroy(VECTOR *v)
+{
+ free(v->item);
+#ifdef VECTOR_DEBUG
+ v->item = NULL;
+#endif
+ free(v);
+}
+
+/*** vector_size **************************************************************/
+int vector_size(VECTOR *v)
+{
+ assert(v != NULL);
+ return v->size;
+}
+
+/*** vector_insert*************************************************************
+ * nice thing about file descriptors is that we are assured by POSIX
+ * that they are monotonically increasing.
+ */
+int vector_insert(VECTOR *v, int key, PPTP_CALL * call)
+{
+ int i;
+ assert(v != NULL && call != NULL);
+ assert(!vector_contains(v, key));
+#ifdef VECTOR_DEBUG
+ assert(v->key_max < key);
+#endif
+ if (!(v->size < v->alloc)) {
+ void *tmp = realloc(v->item, sizeof(*(v->item)) * 2 * v->alloc);
+ if (tmp != NULL) {
+ v->alloc *= 2;
+ v->item = tmp;
+ } else return FALSE; /* failed to alloc memory. */
+ }
+ assert(v->size < v->alloc);
+ /* for safety, we make this work in the general case;
+ * but this is optimized for adding call to the end of the vector.
+ */
+ for(i = v->size - 1; i >= 0; i--)
+ if (v->item[i].key < key)
+ break;
+ /* insert after item i */
+ memmove(&v->item[i + 2], &v->item[i + 1],
+ (v->size - i - 1) * sizeof(*(v->item)));
+ v->item[i + 1].key = key;
+ v->item[i + 1].call = call;
+ v->size++;
+#ifdef VECTOR_DEBUG
+ if (v->key_max < key) /* ie, always. */
+ v->key_max = key;
+#endif
+ return TRUE;
+}
+
+/*** vector_remove ************************************************************/
+int vector_remove(VECTOR *v, int key)
+{
+ struct vector_item *tmp;
+ assert(v != NULL);
+ if ((tmp =binary_search(v,key)) == NULL) return FALSE;
+ assert(tmp >= v->item && tmp < v->item + v->size);
+ memmove(tmp, tmp + 1, (v->size - (v->item - tmp) - 1) * sizeof(*(v->item)));
+ v->size--;
+ return TRUE;
+}
+
+/*** vector_search ************************************************************/
+int vector_search(VECTOR *v, int key, PPTP_CALL **call)
+{
+ struct vector_item *tmp;
+ assert(v != NULL);
+ tmp = binary_search(v, key);
+ if (tmp ==NULL) return FALSE;
+ *call = tmp->call;
+ return TRUE;
+}
+
+/*** vector_contains **********************************************************/
+int vector_contains(VECTOR *v, int key)
+{
+ assert(v != NULL);
+ return (binary_search(v, key) != NULL);
+}
+
+/*** vector_item **************************************************************/
+static struct vector_item *binary_search(VECTOR *v, int key)
+{
+ int l,r,x;
+ l = 0;
+ r = v->size - 1;
+ while (r >= l) {
+ x = (l + r)/2;
+ if (key < v->item[x].key) r = x - 1; else l = x + 1;
+ if (key == v->item[x].key) return &(v->item[x]);
+ }
+ return NULL;
+}
+
+/*** vector_scan ***************************************************************
+ * Hmm. Let's be fancy and use a binary search for the first
+ * unused key, taking advantage of the list is stored sorted; ie
+ * we can look at pointers and keys at two different locations,
+ * and if (ptr1 - ptr2) = (key1 - key2) then all the slots
+ * between ptr1 and ptr2 are filled. Note that ptr1-ptr2 should
+ * never be greater than key1-key2 (no duplicate keys!)... we
+ * check for this.
+ */
+int vector_scan(VECTOR *v, int lo, int hi, int *key)
+{
+ int l,r,x;
+ assert(v != NULL);
+ assert(key != NULL);
+ if ((v->size<1) || (lo < v->item[0].key)) { *key = lo; return TRUE; }
+ /* our array bounds */
+ l = 0; r = v->size - 1;
+ while (r > l) {
+ /* check for a free spot right after l */
+ if (v->item[l].key + 1 < v->item[l + 1].key) { /* found it! */
+ *key = v->item[l].key + 1;
+ return TRUE;
+ }
+ /* no dice. Let's see if the free spot is before or after the midpoint */
+ x = (l + r)/2;
+ /* Okay, we have right (r), left (l) and the probe (x). */
+ assert(x - l <= v->item[x].key - v->item[l].key);
+ assert(r - x <= v->item[r].key - v->item[x].key);
+ if (x - l < v->item[x].key - v->item[l].key)
+ /* room between l and x */
+ r = x;
+ else /* no room between l and x */
+ if (r - x < v->item[r].key - v->item[x].key)
+ /* room between x and r */
+ l = x;
+ else /* no room between x and r, either */
+ break; /* game over, man. */
+ }
+ /* no room found in already allocated space. Check to see if
+ * there's free space above allocated entries. */
+ if (v->item[v->size - 1].key < hi) {
+ *key = v->item[v->size - 1].key + 1;
+ return TRUE;
+ }
+ /* outta luck */
+ return FALSE;
+}
+
+/*** vector_get_Nth ***********************************************************/
+PPTP_CALL * vector_get_Nth(VECTOR *v, int n)
+{
+ assert(v != NULL);
+ assert(0 <= n && n < vector_size(v));
+ return v->item[n].call;
+}
--- /dev/null
+++ b/pppd/plugins/pptp/vector.h
@@ -0,0 +1,31 @@
+/* vector.h ..... store a vector of PPTP_CALL information and search it
+ * efficiently.
+ * C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: vector.h,v 1.1.1.1 2000/12/23 08:19:51 scott Exp $
+ */
+
+#ifndef INC_VECTOR_H
+#define INC_VECTOR_H
+
+#include "pptp_ctrl.h" /* for definition of PPTP_CALL */
+
+typedef struct vector_struct VECTOR;
+
+VECTOR *vector_create();
+void vector_destroy(VECTOR *v);
+
+int vector_size(VECTOR *v);
+
+/* vector_insert and vector_search return TRUE on success, FALSE on failure. */
+int vector_insert(VECTOR *v, int key, PPTP_CALL * call);
+int vector_remove(VECTOR *v, int key);
+int vector_search(VECTOR *v, int key, PPTP_CALL ** call);
+/* vector_contains returns FALSE if not found, TRUE if found. */
+int vector_contains(VECTOR *v, int key);
+/* find first unused key. Returns TRUE on success, FALSE if no. */
+int vector_scan(VECTOR *v, int lo, int hi, int *key);
+/* get a specific PPTP_CALL ... useful only when iterating. */
+PPTP_CALL * vector_get_Nth(VECTOR *v, int n);
+
+#endif /* INC_VECTOR_H */