[PATCH 3/6] PPP LCP support
Kristen Carlson Accardi
kristen at linux.intel.com
Mon Mar 22 17:05:58 PDT 2010
Implement LCP support for the PPP protocol.
---
Makefile.am | 2 +-
gatchat/gatppp.c | 6 +-
gatchat/ppp.c | 47 ++++++++++
gatchat/ppp.h | 7 ++
gatchat/ppp_lcp.c | 246 +++++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 306 insertions(+), 2 deletions(-)
create mode 100644 gatchat/ppp_lcp.c
diff --git a/Makefile.am b/Makefile.am
index a58f10e..1a444ca 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -58,7 +58,7 @@ gatchat_sources = gatchat/gatchat.h gatchat/gatchat.c \
gatchat/gatserver.h gatchat/gatserver.c \
gatchat/gatppp.c gatchat/gatppp.h \
gatchat/ppp.c gatchat/ppp.h gatchat/ppp_cp.h \
- gatchat/ppp_cp.c
+ gatchat/ppp_cp.c gatchat/ppp_lcp.c
udev_files = plugins/ofono.rules
diff --git a/gatchat/gatppp.c b/gatchat/gatppp.c
index 7b68ff3..f083842 100644
--- a/gatchat/gatppp.c
+++ b/gatchat/gatppp.c
@@ -40,6 +40,7 @@
void g_at_ppp_open(GAtPPP *ppp)
{
/* send an OPEN event to the lcp layer */
+ lcp_open(ppp->lcp);
}
void g_at_ppp_set_connect_function(GAtPPP *ppp,
@@ -69,6 +70,9 @@ void g_at_ppp_shutdown(GAtPPP *ppp)
/* cleanup modem channel */
g_source_remove(ppp->modem_watch);
g_io_channel_unref(ppp->modem);
+
+ /* remove lcp */
+ lcp_free(ppp->lcp);
}
void g_at_ppp_ref(GAtPPP *ppp)
@@ -117,7 +121,7 @@ GAtPPP *g_at_ppp_new(GIOChannel *modem)
ppp->index = 0;
/* initialize the lcp state */
-
+ ppp->lcp = lcp_new(ppp);
/* initialize the autentication state */
diff --git a/gatchat/ppp.c b/gatchat/ppp.c
index db20d51..2399ed4 100644
--- a/gatchat/ppp.c
+++ b/gatchat/ppp.c
@@ -350,16 +350,19 @@ gboolean ppp_cb(GIOChannel *channel, GIOCondition cond, gpointer data)
void ppp_close(GAtPPP *ppp)
{
/* send a CLOSE event to the lcp layer */
+ lcp_close(ppp->lcp);
}
static void ppp_link_establishment(GAtPPP *ppp)
{
/* signal UP event to LCP */
+ lcp_establish(ppp->lcp);
}
static void ppp_terminate(GAtPPP *ppp)
{
/* signal DOWN event to LCP */
+ lcp_terminate(ppp->lcp);
}
static void ppp_authenticate(GAtPPP *ppp)
@@ -452,3 +455,47 @@ 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);
}
+
+void ppp_set_auth(GAtPPP *ppp, guint8* auth_data)
+{
+ guint16 proto = get_host_short(auth_data);
+
+ switch (proto) {
+ case CHAP_PROTOCOL:
+ /* get the algorithm */
+ break;
+ default:
+ g_printerr("unknown authentication proto\n");
+ break;
+ }
+}
+
+void ppp_set_recv_accm(GAtPPP *ppp, guint32 accm)
+{
+ ppp->recv_accm = accm;
+}
+
+guint32 ppp_get_xmit_accm(GAtPPP *ppp)
+{
+ return ppp->xmit_accm[0];
+}
+
+void ppp_set_pfc(GAtPPP *ppp, gboolean pfc)
+{
+ ppp->pfc = pfc;
+}
+
+gboolean ppp_get_pfc(GAtPPP *ppp)
+{
+ return ppp->pfc;
+}
+
+void ppp_set_acfc(GAtPPP *ppp, gboolean acfc)
+{
+ ppp->acfc = acfc;
+}
+
+gboolean ppp_get_acfc(GAtPPP *ppp)
+{
+ return ppp->acfc;
+}
diff --git a/gatchat/ppp.h b/gatchat/ppp.h
index 0f39440..7753a39 100644
--- a/gatchat/ppp.h
+++ b/gatchat/ppp.h
@@ -98,6 +98,7 @@ static inline guint16 __get_unaligned_short(const gpointer p)
struct _GAtPPP {
gint ref_count;
enum ppp_phase phase;
+ struct pppcp_data *lcp;
guint8 buffer[BUFFERSZ];
int index;
gint mru;
@@ -130,3 +131,9 @@ 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);
+struct pppcp_data * lcp_new(GAtPPP *ppp);
+void lcp_free(struct pppcp_data *lcp);
+void lcp_open(struct pppcp_data *data);
+void lcp_close(struct pppcp_data *data);
+void lcp_establish(struct pppcp_data *data);
+void lcp_terminate(struct pppcp_data *data);
diff --git a/gatchat/ppp_lcp.c b/gatchat/ppp_lcp.c
new file mode 100644
index 0000000..644842a
--- /dev/null
+++ b/gatchat/ppp_lcp.c
@@ -0,0 +1,246 @@
+/*
+ *
+ * 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
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <termios.h>
+#include <glib.h>
+#include <arpa/inet.h>
+#include "gatppp.h"
+#include "ppp.h"
+
+enum lcp_options {
+ RESERVED = 0,
+ MRU = 1,
+ ACCM = 2,
+ AUTH_PROTO = 3,
+ QUAL_PROTO = 4,
+ MAGIC_NUMBER = 5,
+ DEPRECATED_QUAL_PROTO = 6,
+ PFC = 7,
+ ACFC = 8,
+};
+
+#define LCP_SUPPORTED_CODES ((1 << CONFIGURE_REQUEST) | \
+ (1 << CONFIGURE_ACK) | \
+ (1 << CONFIGURE_NAK) | \
+ (1 << CONFIGURE_REJECT) | \
+ (1 << TERMINATE_REQUEST) | \
+ (1 << TERMINATE_ACK) | \
+ (1 << CODE_REJECT) | \
+ (1 << PROTOCOL_REJECT) | \
+ (1 << ECHO_REQUEST) | \
+ (1 << ECHO_REPLY) | \
+ (1 << DISCARD_REQUEST))
+
+/*
+ * signal the Up event to the NCP
+ */
+static void lcp_up(struct pppcp_data *pppcp)
+{
+ ppp_generate_event(pppcp->ppp, PPP_OPENED);
+}
+
+/*
+ * signal the Down event to the NCP
+ */
+static void lcp_down(struct pppcp_data *pppcp)
+{
+ ppp_generate_event(pppcp->ppp, PPP_DOWN);
+}
+
+/*
+ * Indicate that the lower layer is now needed
+ * Should trigger Up event
+ */
+static void lcp_started(struct pppcp_data *pppcp)
+{
+ ppp_generate_event(pppcp->ppp, PPP_UP);
+}
+
+/*
+ * Indicate that the lower layer is not needed
+ * Should trigger Down event
+ */
+static void lcp_finished(struct pppcp_data *pppcp)
+{
+ ppp_generate_event(pppcp->ppp, PPP_CLOSING);
+}
+
+/*
+ * Scan the option to see if it is acceptable, unacceptable, or rejected
+ *
+ * We need to use a default case here because this option type value
+ * could be anything.
+ */
+static guint lcp_option_scan(struct ppp_option *option, gpointer user)
+{
+ switch (option->type) {
+ case ACCM:
+ case AUTH_PROTO:
+ /* XXX check to make sure it's a proto we recognize */
+ case MAGIC_NUMBER:
+ case PFC:
+ case ACFC:
+ return OPTION_ACCEPT;
+ break;
+ default:
+ return OPTION_REJECT;
+ }
+}
+
+/*
+ * act on an acceptable option
+ *
+ * We need to use a default case here because this option type value
+ * could be anything.
+ */
+static void lcp_option_process(gpointer data, gpointer user)
+{
+ struct ppp_option *option = data;
+ struct pppcp_data *pppcp = user;
+ GAtPPP *ppp = pppcp->ppp;
+ guint32 magic;
+
+ switch (option->type) {
+ case ACCM:
+ ppp_set_recv_accm(ppp, get_host_long(option->data));
+ break;
+ case AUTH_PROTO:
+ ppp_set_auth(ppp, option->data);
+ break;
+ case MAGIC_NUMBER:
+ /* XXX handle loopback */
+ magic = get_host_long(option->data);
+ if (magic != pppcp->magic_number)
+ pppcp->magic_number = magic;
+ else
+ g_print("looped back? I should do something\n");
+ break;
+ case PFC:
+ ppp_set_pfc(ppp, TRUE);
+ break;
+ case ACFC:
+ ppp_set_acfc(ppp, TRUE);
+ break;
+ default:
+ g_printerr("unhandled option %d\n", option->type);
+ }
+}
+
+struct ppp_packet_handler lcp_packet_handler = {
+ .proto = LCP_PROTOCOL,
+ .handler = pppcp_process_packet,
+};
+
+struct pppcp_action lcp_action = {
+ .this_layer_up = lcp_up,
+ .this_layer_down = lcp_down,
+ .this_layer_started = lcp_started,
+ .this_layer_finished = lcp_finished,
+ .option_scan = lcp_option_scan,
+ .option_process = lcp_option_process,
+};
+
+void lcp_open(struct pppcp_data *data)
+{
+ if (data == NULL)
+ return;
+
+ /* send an open event to the lcp layer */
+ pppcp_generate_event(data, OPEN, NULL, 0);
+}
+
+void lcp_close(struct pppcp_data *data)
+{
+ if (data == NULL)
+ return;
+
+ /* send a CLOSE event to the lcp layer */
+ pppcp_generate_event(data, CLOSE, NULL, 0);
+}
+
+void lcp_establish(struct pppcp_data *data)
+{
+ if (data == NULL)
+ return;
+
+ /* send an UP event to the lcp layer */
+ pppcp_generate_event(data, UP, NULL, 0);
+}
+
+void lcp_terminate(struct pppcp_data *data)
+{
+ if (data == NULL)
+ return;
+
+ /* send a DOWN event to the lcp layer */
+ pppcp_generate_event(data, DOWN, NULL, 0);
+}
+
+void lcp_free(struct pppcp_data *lcp)
+{
+ if (lcp == NULL)
+ return;
+
+ /* TBD unregister packet handler */
+
+ pppcp_free(lcp);
+}
+
+struct pppcp_data * lcp_new(GAtPPP *ppp)
+{
+ struct pppcp_data *pppcp;
+ struct ppp_option *option;
+ guint16 codes = LCP_SUPPORTED_CODES;
+
+ pppcp = pppcp_new(ppp, LCP_PROTOCOL, NULL);
+ if (!pppcp) {
+ g_print("Failed to allocate PPPCP struct\n");
+ return NULL;
+ }
+ pppcp_set_valid_codes(pppcp, codes);
+ pppcp->priv = pppcp;
+
+ /* set the actions */
+ pppcp->action = &lcp_action;
+
+ /* add the default config options */
+ option = g_try_malloc0(6);
+ if (option == NULL) {
+ pppcp_free(pppcp);
+ return NULL;
+ }
+ option->type = ACCM;
+ option->length = 6;
+ pppcp_add_config_option(pppcp, option);
+
+ /* register packet handler for LCP protocol */
+ lcp_packet_handler.priv = pppcp;
+ ppp_register_packet_handler(&lcp_packet_handler);
+ return pppcp;
+}
--
1.6.6.1
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