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authorjow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-06-11 20:07:46 +0000
committerjow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-06-11 20:07:46 +0000
commit3c67ec79206ab4a96bb063c14ac824013dfcd448 (patch)
tree28df53031ba722ec8b05b3bb34e91f04a59812c9 /package/ppp
parent4f0c36d0d387a10bd07feb14c9c78463db5799d3 (diff)
[package] 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 git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32197 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/ppp')
-rw-r--r--package/ppp/Makefile23
-rwxr-xr-xpackage/ppp/files/ppp.sh49
-rw-r--r--package/ppp/patches/500-add-pptp-plugin.patch3065
3 files changed, 3135 insertions, 2 deletions
diff --git a/package/ppp/Makefile b/package/ppp/Makefile
index 27b1f42825..d0bf9eb200 100644
--- a/package/ppp/Makefile
+++ b/package/ppp/Makefile
@@ -1,5 +1,5 @@
#
-# Copyright (C) 2006-2011 OpenWrt.org
+# Copyright (C) 2006-2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=ppp
PKG_VERSION:=2.4.5
-PKG_RELEASE:=5
+PKG_RELEASE:=6
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=ftp://ftp.samba.org/pub/ppp/
@@ -105,6 +105,16 @@ define Package/ppp-mod-pppol2tp/description
This package contains a PPPoL2TP (PPP over L2TP) plugin for ppp.
endef
+define Package/ppp-mod-pptp
+$(call Package/ppp/Default)
+ DEPENDS:=@(PACKAGE_ppp||PACKAGE_ppp-multilink) +kmod-pptp +kmod-mppe
+ TITLE:=PPtP plugin
+endef
+
+define Package/ppp-mod-pptp/description
+This package contains a PPtP plugin for ppp.
+endef
+
define Package/chat
$(call Package/ppp/Default)
DEPENDS:=@(PACKAGE_ppp||PACKAGE_ppp-multilink)
@@ -216,6 +226,14 @@ define Package/ppp-mod-pppol2tp/install
$(1)/usr/lib/pppd/$(PKG_VERSION)/
endef
+define Package/ppp-mod-pptp/install
+ $(INSTALL_DIR) $(1)/usr/lib/pppd/$(PKG_VERSION)
+ $(INSTALL_BIN) $(PKG_INSTALL_DIR)/lib/pppd/$(PKG_VERSION)/pptp.so \
+ $(1)/usr/lib/pppd/$(PKG_VERSION)/
+ $(INSTALL_DIR) $(1)/etc/ppp
+ $(INSTALL_DATA) ./files/etc/ppp/options.pptp $(1)/etc/ppp/
+endef
+
define Package/chat/install
$(INSTALL_DIR) $(1)/usr/sbin
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/sbin/chat $(1)/usr/sbin/
@@ -237,6 +255,7 @@ $(eval $(call BuildPackage,ppp-mod-pppoa))
$(eval $(call BuildPackage,ppp-mod-pppoe))
$(eval $(call BuildPackage,ppp-mod-radius))
$(eval $(call BuildPackage,ppp-mod-pppol2tp))
+$(eval $(call BuildPackage,ppp-mod-pptp))
$(eval $(call BuildPackage,chat))
$(eval $(call BuildPackage,pppdump))
$(eval $(call BuildPackage,pppstats))
diff --git a/package/ppp/files/ppp.sh b/package/ppp/files/ppp.sh
index 98099dba54..5016be850d 100755
--- a/package/ppp/files/ppp.sh
+++ b/package/ppp/files/ppp.sh
@@ -166,9 +166,58 @@ proto_pppoa_teardown() {
ppp_generic_teardown "$@"
}
+proto_pptp_init_config() {
+ ppp_generic_init_config
+ proto_config_add_string "server"
+ proto_config_add_boolean "buffering"
+ available=1
+ no_device=1
+}
+
+proto_pptp_setup() {
+ local config="$1"
+ local iface="$2"
+
+ local ip serv_addr server
+ json_get_var server server && {
+ for ip in $(resolveip -t 5 "$server"); do
+ ( proto_add_host_dependency "$config" "$ip" )
+ serv_addr=1
+ done
+ }
+ [ -n "$serv_addr" ] || {
+ echo "Could not resolve server address"
+ sleep 5
+ proto_setup_failed "$config"
+ exit 1
+ }
+
+ local buffering
+ json_get_var buffering buffering
+ [ "${buffering:-1}" == 0 ] && buffering="--nobuffer" || buffering=
+
+ local load
+ for module in slhc ppp_generic ppp_async ppp_mppe ip_gre gre pptp; do
+ grep -q "$module" /proc/modules && continue
+ /sbin/insmod $module 2>&- >&-
+ load=1
+ done
+ [ "$load" = "1" ] && sleep 1
+
+ ppp_generic_setup "$config" \
+ plugin pptp.so \
+ pptp_server $server \
+ file /etc/ppp/options.pptp
+}
+
+proto_pptp_teardown() {
+ ppp_generic_teardown "$@"
+}
+
[ -n "$INCLUDE_ONLY" ] || {
add_protocol ppp
[ -f /usr/lib/pppd/*/rp-pppoe.so ] && add_protocol pppoe
[ -f /usr/lib/pppd/*/pppoatm.so ] && add_protocol pppoa
+ [ -f /usr/lib/pppd/*/pptp.so ] && add_protocol pptp
}
diff --git a/package/ppp/patches/500-add-pptp-plugin.patch b/package/ppp/patches/500-add-pptp-plugin.patch
new file mode 100644
index 0000000000..d984e1b162
--- /dev/null
+++ b/package/ppp/patches/500-add-pptp-plugin.patch
@@ -0,0 +1,3065 @@
+--- a/configure
++++ b/configure
+@@ -195,7 +195,7 @@ if [ -d "$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 */
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