mirror of git://git.sysmocom.de/ofono
Basic PPP protocol support
This patch implements the basic PPP protocol. LCP, NCP etc. are handled in a different patch.
This commit is contained in:
Kristen Carlson Accardi
Marcel Holtmann
parent
a5d54581ad
commit
d38443482f
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@ -55,7 +55,9 @@ gatchat_sources = gatchat/gatchat.h gatchat/gatchat.c \
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gatchat/gattty.h gatchat/gattty.c \
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gatchat/gatutil.h gatchat/gatutil.c \
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gatchat/gat.h \
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gatchat/gatserver.h gatchat/gatserver.c
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gatchat/gatserver.h gatchat/gatserver.c \
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gatchat/gatppp.c gatchat/gatppp.h \
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gatchat/ppp.c gatchat/ppp.h
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udev_files = plugins/ofono.rules
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@ -0,0 +1,133 @@
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/*
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*
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* PPP library with GLib integration
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*
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* Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <termios.h>
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#include <arpa/inet.h>
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#include <glib.h>
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#include "gatutil.h"
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#include "gatppp.h"
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#include "ppp.h"
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/* Administrative Open */
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void g_at_ppp_open(GAtPPP *ppp)
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{
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/* send an OPEN event to the lcp layer */
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}
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void g_at_ppp_set_connect_function(GAtPPP *ppp,
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GAtPPPConnectFunc callback, gpointer user_data)
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{
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ppp->connect_cb = callback;
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ppp->connect_data = user_data;
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}
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void g_at_ppp_set_disconnect_function(GAtPPP *ppp,
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GAtPPPDisconnectFunc callback,
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gpointer user_data)
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{
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ppp->disconnect_cb = callback;
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ppp->disconnect_data = user_data;
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}
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void g_at_ppp_shutdown(GAtPPP *ppp)
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{
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/* close the ppp */
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ppp_close(ppp);
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/* clean up all the queues */
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g_queue_free(ppp->event_queue);
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g_queue_free(ppp->recv_queue);
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/* cleanup modem channel */
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g_source_remove(ppp->modem_watch);
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g_io_channel_unref(ppp->modem);
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}
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void g_at_ppp_ref(GAtPPP *ppp)
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{
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g_atomic_int_inc(&ppp->ref_count);
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}
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void g_at_ppp_unref(GAtPPP *ppp)
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{
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if (g_atomic_int_dec_and_test(&ppp->ref_count)) {
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g_at_ppp_shutdown(ppp);
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g_free(ppp);
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}
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}
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GAtPPP *g_at_ppp_new(GIOChannel *modem)
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{
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GAtPPP *ppp;
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ppp = g_try_malloc0(sizeof(GAtPPP));
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if (!ppp)
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return NULL;
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ppp->modem = g_io_channel_ref(modem);
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if (!g_at_util_setup_io(ppp->modem, G_IO_FLAG_NONBLOCK)) {
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g_io_channel_unref(modem);
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g_free(ppp);
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return NULL;
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}
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g_io_channel_set_buffered(modem, FALSE);
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ppp->ref_count = 1;
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/* set options to defaults */
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ppp->mru = DEFAULT_MRU;
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ppp->recv_accm = DEFAULT_ACCM;
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ppp->xmit_accm[0] = DEFAULT_ACCM;
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ppp->xmit_accm[3] = 0x60000000; /* 0x7d, 0x7e */
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ppp->pfc = FALSE;
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ppp->acfc = FALSE;
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/* allocate the queues */
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ppp->event_queue = g_queue_new();
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ppp->recv_queue = g_queue_new();
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ppp->index = 0;
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/* initialize the lcp state */
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/* initialize the autentication state */
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/* intialize the network state */
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/* start listening for packets from the modem */
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ppp->modem_watch = g_io_add_watch(modem,
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G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
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ppp_cb, ppp);
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return ppp;
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}
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@ -0,0 +1,58 @@
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/*
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*
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* PPP library with GLib integration
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*
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* Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __G_AT_PPP_H
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#define __G_AT_PPP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct _GAtPPP;
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typedef struct _GAtPPP GAtPPP;
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typedef enum _GAtPPPConnectStatus {
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G_AT_PPP_CONNECT_SUCCESS,
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G_AT_PPP_CONNECT_FAIL
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} GAtPPPConnectStatus;
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typedef void (*GAtPPPConnectFunc)(GAtPPP *ppp, GAtPPPConnectStatus success,
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guint32 ip_address,
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guint32 dns1, guint32 dns2,
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gpointer user_data);
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typedef void (*GAtPPPDisconnectFunc)(GAtPPP *ppp, gpointer user_data);
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GAtPPP * g_at_ppp_new(GIOChannel *modem);
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void g_at_ppp_open(GAtPPP *ppp);
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void g_at_ppp_set_connect_function(GAtPPP *ppp,
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GAtPPPConnectFunc callback, gpointer user_data);
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void g_at_ppp_set_disconnect_function(GAtPPP *ppp,
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GAtPPPDisconnectFunc callback,
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gpointer user_data);
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void g_at_ppp_shutdown(GAtPPP *ppp);
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void g_at_ppp_ref(GAtPPP *ppp);
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void g_at_ppp_unref(GAtPPP *ppp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __G_AT_PPP_H */
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@ -0,0 +1,454 @@
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/*
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*
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* PPP library with GLib integration
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*
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* Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <termios.h>
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#include <arpa/inet.h>
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#include <glib.h>
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#include "gatutil.h"
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#include "gatppp.h"
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#include "ppp.h"
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#define PPPINITFCS16 0xffff /* Initial FCS value */
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#define PPPGOODFCS16 0xf0b8 /* Good final FCS value */
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static GList *packet_handlers = NULL;
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void ppp_register_packet_handler(struct ppp_packet_handler *handler)
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{
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packet_handlers = g_list_append(packet_handlers, handler);
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}
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/*
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* FCS lookup table copied from rfc1662.
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*/
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static guint16 fcstab[256] = {
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0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
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};
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/*
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* Calculate a new fcs given the current fcs and the new data.
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* copied from rfc1662
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*
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* The FCS field is calculated over all bits of the Address, Control,
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* Protocol, Information and Padding fields, not including any start
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* and stop bits (asynchronous) nor any bits (synchronous) or octets
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* (asynchronous or synchronous) inserted for transparency. This
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* also does not include the Flag Sequences nor the FCS field itself.
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*/
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static guint16 ppp_fcs(guint16 fcs, guint8 c)
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{
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guint16 new_fcs;
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new_fcs = (fcs >> 8) ^ fcstab[(fcs ^ c) & 0xff];
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return new_fcs;
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}
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/*
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* escape any chars less than 0x20, and check the transmit accm table to
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* see if this character should be escaped.
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*/
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static gboolean ppp_escape(GAtPPP *ppp, guint8 c, gboolean lcp)
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{
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if ((lcp && c < 0x20) || (ppp->xmit_accm[c >> 5] & (1 << (c & 0x1f))))
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return TRUE;
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return FALSE;
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}
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static void ppp_put(GAtPPP *ppp, guint8 *buf, int *pos,
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guint8 c, gboolean lcp)
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{
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int i = *pos;
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/* escape characters if needed, copy into buf, increment pos */
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if (ppp_escape(ppp, c, lcp)) {
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buf[i++] = PPP_ESC;
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buf[i++] = c ^ 0x20;
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} else
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buf[i++] = c;
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*pos = i;
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}
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/* XXX implement PFC and ACFC */
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static guint8 *ppp_encode(GAtPPP *ppp, guint8 *data, int len,
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guint *newlen)
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{
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int pos = 0;
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int i = 0;
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guint16 fcs = PPPINITFCS16;
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guint16 proto = get_host_short(data);
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gboolean lcp = (proto == LCP_PROTOCOL);
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guint8 *frame = g_try_malloc0(BUFFERSZ);
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if (!frame)
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return NULL;
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/* copy in the HDLC framing */
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frame[pos++] = PPP_FLAG_SEQ;
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/* from here till end flag, calculate FCS over each character */
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fcs = ppp_fcs(fcs, PPP_ADDR_FIELD);
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ppp_put(ppp, frame, &pos, PPP_ADDR_FIELD, lcp);
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fcs = ppp_fcs(fcs, PPP_CTRL);
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ppp_put(ppp, frame, &pos, PPP_CTRL, lcp);
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/*
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* for each byte, first calculate FCS, then do escaping if
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* neccessary
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*/
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while (len--) {
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fcs = ppp_fcs(fcs, data[i]);
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ppp_put(ppp, frame, &pos, data[i++], lcp);
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}
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/* add FCS */
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fcs ^= 0xffff; /* complement */
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ppp_put(ppp, frame, &pos, (guint8)(fcs & 0x00ff), lcp);
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ppp_put(ppp, frame, &pos, (guint8)((fcs >> 8) & 0x00ff), lcp);
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/* add flag */
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frame[pos++] = PPP_FLAG_SEQ;
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*newlen = pos;
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return frame;
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}
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static gint is_proto_handler(gconstpointer a, gconstpointer b)
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{
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const struct ppp_packet_handler *h = a;
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const guint16 proto = (guint16) GPOINTER_TO_UINT(b);
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if (h->proto == proto)
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return 0;
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else
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return -1;
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}
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/* called when we have received a complete ppp frame */
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static void ppp_recv(GAtPPP *ppp)
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{
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guint16 protocol;
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guint8 *frame, *packet;
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GList *list;
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struct ppp_packet_handler *h;
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/* pop frames off of receive queue */
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while ((frame = g_queue_pop_head(ppp->recv_queue))) {
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protocol = ppp_proto(frame);
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packet = ppp_info(frame);
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/*
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* check to see if we have a protocol handler
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* registered for this packet
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*/
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list = g_list_find_custom(packet_handlers,
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GUINT_TO_POINTER(protocol),
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is_proto_handler);
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if (list) {
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h = list->data;
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h->handler(h->priv, packet);
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}
|
||||
g_free(frame);
|
||||
}
|
||||
}
|
||||
|
||||
/* XXX - Implement PFC and ACFC */
|
||||
static guint8 *ppp_decode(GAtPPP *ppp, guint8 *frame)
|
||||
{
|
||||
guint8 *data;
|
||||
guint pos = 0;
|
||||
int i = 0;
|
||||
int len;
|
||||
guint16 fcs;
|
||||
|
||||
data = g_try_malloc0(ppp->mru + 10);
|
||||
if (!data)
|
||||
return NULL;
|
||||
|
||||
/* skip the first flag char */
|
||||
pos++;
|
||||
|
||||
/* TBD - how to deal with recv_accm */
|
||||
while (frame[pos] != PPP_FLAG_SEQ) {
|
||||
/* scan for escape character */
|
||||
if (frame[pos] == PPP_ESC) {
|
||||
/* skip that char */
|
||||
pos++;
|
||||
data[i] = frame[pos] ^ 0x20;
|
||||
} else
|
||||
data[i] = frame[pos];
|
||||
i++; pos++;
|
||||
}
|
||||
|
||||
len = i;
|
||||
|
||||
/* see if we have a good FCS */
|
||||
fcs = PPPINITFCS16;
|
||||
for (i = 0; i < len; i++)
|
||||
fcs = ppp_fcs(fcs, data[i]);
|
||||
|
||||
if (fcs != PPPGOODFCS16) {
|
||||
g_free(data);
|
||||
return NULL;
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
static void ppp_feed(GAtPPP *ppp, guint8 *data, gsize len)
|
||||
{
|
||||
guint pos = 0;
|
||||
guint8 *frame;
|
||||
|
||||
/* collect bytes until we detect we have received a complete frame */
|
||||
/* examine the data. If we are at the beginning of a new frame,
|
||||
* allocate memory to buffer the frame.
|
||||
*/
|
||||
|
||||
for (pos = 0; pos < len; pos++) {
|
||||
if (data[pos] == PPP_FLAG_SEQ) {
|
||||
if (ppp->index != 0) {
|
||||
/* store last flag character & decode */
|
||||
ppp->buffer[ppp->index++] = data[pos];
|
||||
frame = ppp_decode(ppp, ppp->buffer);
|
||||
|
||||
/* push decoded frame onto receive queue */
|
||||
if (frame)
|
||||
g_queue_push_tail(ppp->recv_queue,
|
||||
frame);
|
||||
|
||||
/* zero buffer */
|
||||
memset(ppp->buffer, 0, BUFFERSZ);
|
||||
ppp->index = 0;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
/* copy byte to buffer */
|
||||
if (ppp->index < BUFFERSZ)
|
||||
ppp->buffer[ppp->index++] = data[pos];
|
||||
}
|
||||
/* process receive queue */
|
||||
ppp_recv(ppp);
|
||||
}
|
||||
|
||||
/*
|
||||
* transmit out through the lower layer interface
|
||||
*
|
||||
* infolen - length of the information part of the packet
|
||||
*/
|
||||
void ppp_transmit(GAtPPP *ppp, guint8 *packet, guint infolen)
|
||||
{
|
||||
guint8 *frame;
|
||||
guint framelen;
|
||||
GError *error = NULL;
|
||||
GIOStatus status;
|
||||
gsize bytes_written;
|
||||
|
||||
/*
|
||||
* do the octet stuffing. Add 2 bytes to the infolen to
|
||||
* include the protocol field.
|
||||
*/
|
||||
frame = ppp_encode(ppp, packet, infolen + 2, &framelen);
|
||||
if (!frame) {
|
||||
g_printerr("Failed to encode packet to transmit\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* transmit through the lower layer interface */
|
||||
/*
|
||||
* TBD - should we just put this on a queue and transmit when
|
||||
* we won't block, or allow ourselves to block here?
|
||||
*/
|
||||
status = g_io_channel_write_chars(ppp->modem, (gchar *) frame,
|
||||
framelen, &bytes_written, &error);
|
||||
|
||||
g_free(frame);
|
||||
}
|
||||
|
||||
gboolean ppp_cb(GIOChannel *channel, GIOCondition cond, gpointer data)
|
||||
{
|
||||
GAtPPP *ppp = data;
|
||||
GIOStatus status;
|
||||
gchar buf[256];
|
||||
gsize bytes_read;
|
||||
GError *error = NULL;
|
||||
|
||||
if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
|
||||
g_print("G_IO_NVAL | G_IO_ERR");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (cond & G_IO_IN) {
|
||||
status = g_io_channel_read_chars(channel, buf, 256,
|
||||
&bytes_read, &error);
|
||||
if (bytes_read > 0)
|
||||
ppp_feed(ppp, (guint8 *)buf, bytes_read);
|
||||
if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN)
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Administrative Close */
|
||||
void ppp_close(GAtPPP *ppp)
|
||||
{
|
||||
/* send a CLOSE event to the lcp layer */
|
||||
}
|
||||
|
||||
static void ppp_link_establishment(GAtPPP *ppp)
|
||||
{
|
||||
/* signal UP event to LCP */
|
||||
}
|
||||
|
||||
static void ppp_terminate(GAtPPP *ppp)
|
||||
{
|
||||
/* signal DOWN event to LCP */
|
||||
}
|
||||
|
||||
static void ppp_authenticate(GAtPPP *ppp)
|
||||
{
|
||||
/* we don't do authentication right now, so send NONE */
|
||||
if (!ppp->auth_proto)
|
||||
ppp_generate_event(ppp, PPP_NONE);
|
||||
/* otherwise we need to wait for the peer to send us a challenge */
|
||||
}
|
||||
|
||||
static void ppp_dead(GAtPPP *ppp)
|
||||
{
|
||||
/* re-initialize everything */
|
||||
}
|
||||
|
||||
static void ppp_network(GAtPPP *ppp)
|
||||
{
|
||||
/* bring network phase up */
|
||||
}
|
||||
|
||||
static void ppp_transition_phase(GAtPPP *ppp, enum ppp_phase phase)
|
||||
{
|
||||
/* don't do anything if we're already there */
|
||||
if (ppp->phase == phase)
|
||||
return;
|
||||
|
||||
/* set new phase */
|
||||
ppp->phase = phase;
|
||||
|
||||
switch (phase) {
|
||||
case PPP_ESTABLISHMENT:
|
||||
ppp_link_establishment(ppp);
|
||||
break;
|
||||
case PPP_AUTHENTICATION:
|
||||
ppp_authenticate(ppp);
|
||||
break;
|
||||
case PPP_TERMINATION:
|
||||
ppp_terminate(ppp);
|
||||
break;
|
||||
case PPP_DEAD:
|
||||
ppp_dead(ppp);
|
||||
break;
|
||||
case PPP_NETWORK:
|
||||
ppp_network(ppp);
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static void ppp_handle_event(GAtPPP *ppp)
|
||||
{
|
||||
enum ppp_event event;
|
||||
|
||||
while ((event = GPOINTER_TO_UINT(g_queue_pop_head(ppp->event_queue)))){
|
||||
switch (event) {
|
||||
case PPP_UP:
|
||||
/* causes transition to ppp establishment */
|
||||
ppp_transition_phase(ppp, PPP_ESTABLISHMENT);
|
||||
break;
|
||||
case PPP_OPENED:
|
||||
ppp_transition_phase(ppp, PPP_AUTHENTICATION);
|
||||
break;
|
||||
case PPP_CLOSING:
|
||||
/* causes transition to termination phase */
|
||||
ppp_transition_phase(ppp, PPP_TERMINATION);
|
||||
break;
|
||||
case PPP_DOWN:
|
||||
/* cases transition to dead phase */
|
||||
ppp_transition_phase(ppp, PPP_DEAD);
|
||||
break;
|
||||
case PPP_NONE:
|
||||
case PPP_SUCCESS:
|
||||
/* causes transition to network phase */
|
||||
ppp_transition_phase(ppp, PPP_NETWORK);
|
||||
break;
|
||||
case PPP_FAIL:
|
||||
if (ppp->phase == PPP_ESTABLISHMENT)
|
||||
ppp_transition_phase(ppp, PPP_DEAD);
|
||||
else if (ppp->phase == PPP_AUTHENTICATION)
|
||||
ppp_transition_phase(ppp, PPP_TERMINATION);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* send the event handler a new event to process
|
||||
*/
|
||||
void ppp_generate_event(GAtPPP *ppp, enum ppp_event event)
|
||||
{
|
||||
g_queue_push_tail(ppp->event_queue, GUINT_TO_POINTER(event));
|
||||
ppp_handle_event(ppp);
|
||||
}
|
||||
|
|
@ -0,0 +1,130 @@
|
|||
/*
|
||||
*
|
||||
* PPP library with GLib integration
|
||||
*
|
||||
* Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
*/
|
||||
#define DEFAULT_MRU 1500
|
||||
#define BUFFERSZ DEFAULT_MRU*2
|
||||
#define DEFAULT_ACCM 0x00000000
|
||||
#define PPP_ESC 0x7d
|
||||
#define PPP_FLAG_SEQ 0x7e
|
||||
#define PPP_ADDR_FIELD 0xff
|
||||
#define PPP_CTRL 0x03
|
||||
#define LCP_PROTOCOL 0xc021
|
||||
#define CHAP_PROTOCOL 0xc223
|
||||
#define PPP_HEADROOM 2
|
||||
#define HDLC_HEADROOM 3
|
||||
#define HDLC_TAIL 3
|
||||
#define MD5 5
|
||||
|
||||
enum ppp_phase {
|
||||
PPP_DEAD = 0,
|
||||
PPP_ESTABLISHMENT,
|
||||
PPP_AUTHENTICATION,
|
||||
PPP_NETWORK,
|
||||
PPP_TERMINATION,
|
||||
};
|
||||
|
||||
enum ppp_event {
|
||||
PPP_UP = 1,
|
||||
PPP_OPENED,
|
||||
PPP_SUCCESS,
|
||||
PPP_NONE,
|
||||
PPP_CLOSING,
|
||||
PPP_FAIL,
|
||||
PPP_DOWN
|
||||
};
|
||||
|
||||
struct ppp_packet_handler {
|
||||
guint16 proto;
|
||||
void (*handler)(gpointer priv, guint8 *packet);
|
||||
gpointer priv;
|
||||
};
|
||||
|
||||
struct ppp_header {
|
||||
guint16 proto;
|
||||
guint8 info[0];
|
||||
} __attribute__((packed));
|
||||
|
||||
struct packed_short {
|
||||
guint16 s;
|
||||
} __attribute__((packed));
|
||||
|
||||
struct packed_long {
|
||||
guint32 l;
|
||||
} __attribute__((packed));
|
||||
|
||||
static inline guint32 __get_unaligned_long(const gpointer p)
|
||||
{
|
||||
const struct packed_long *ptr = p;
|
||||
return ptr->l;
|
||||
}
|
||||
|
||||
static inline guint16 __get_unaligned_short(const gpointer p)
|
||||
{
|
||||
const struct packed_short *ptr = p;
|
||||
return ptr->s;
|
||||
}
|
||||
|
||||
#define get_host_long(p) \
|
||||
(ntohl(__get_unaligned_long(p)))
|
||||
|
||||
#define get_host_short(p) \
|
||||
(ntohs(__get_unaligned_short(p)))
|
||||
|
||||
#define ppp_info(packet) \
|
||||
(packet + 4)
|
||||
|
||||
#define ppp_proto(packet) \
|
||||
(get_host_short(packet + 2))
|
||||
|
||||
struct _GAtPPP {
|
||||
gint ref_count;
|
||||
enum ppp_phase phase;
|
||||
guint8 buffer[BUFFERSZ];
|
||||
int index;
|
||||
gint mru;
|
||||
guint16 auth_proto;
|
||||
char user_name[256];
|
||||
char passwd[256];
|
||||
gboolean pfc;
|
||||
gboolean acfc;
|
||||
guint32 xmit_accm[8];
|
||||
guint32 recv_accm;
|
||||
GIOChannel *modem;
|
||||
GQueue *event_queue;
|
||||
GQueue *recv_queue;
|
||||
GAtPPPConnectFunc connect_cb;
|
||||
gpointer connect_data;
|
||||
GAtPPPDisconnectFunc disconnect_cb;
|
||||
gpointer disconnect_data;
|
||||
gint modem_watch;
|
||||
};
|
||||
|
||||
gboolean ppp_cb(GIOChannel *channel, GIOCondition cond, gpointer data);
|
||||
void ppp_close(GAtPPP *ppp);
|
||||
void ppp_generate_event(GAtPPP *ppp, enum ppp_event event);
|
||||
void ppp_register_packet_handler(struct ppp_packet_handler *handler);
|
||||
void ppp_transmit(GAtPPP *ppp, guint8 *packet, guint infolen);
|
||||
void ppp_set_auth(GAtPPP *ppp, guint8 *auth_data);
|
||||
void ppp_set_recv_accm(GAtPPP *ppp, guint32 accm);
|
||||
guint32 ppp_get_xmit_accm(GAtPPP *ppp);
|
||||
void ppp_set_pfc(GAtPPP *ppp, gboolean pfc);
|
||||
gboolean ppp_get_pfc(GAtPPP *ppp);
|
||||
void ppp_set_acfc(GAtPPP *ppp, gboolean acfc);
|
||||
gboolean ppp_get_acfc(GAtPPP *ppp);
|
||||
Loading…
Reference in New Issue