mirror of
https://github.com/Telecominfraproject/wlan-ap.git
synced 2025-12-17 09:21:35 +00:00
252 lines
6.8 KiB
Diff
252 lines
6.8 KiB
Diff
From 025746fb8827b0bfb4ff17ef730cec46f135efb3 Mon Sep 17 00:00:00 2001
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From: pavir <pavir@codeaurora.org>
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Date: Mon, 26 Dec 2016 14:41:20 +0530
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Subject: [PATCH] net: l2tp: ppp_channel_proto_version API
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New API added to retrieve channel version info
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Change-Id: Ia4fd236c7cf6170a5034609e75de8c6e4ef79f7b
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Signed-off-by: Shyam Sunder <ssunde@codeaurora.org>
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Signed-off-by: pavir <pavir@codeaurora.org>
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---
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drivers/net/ppp/ppp_generic.c | 66 ++++++++++++++++++++++++++++++++++-
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include/linux/netdevice.h | 1 -
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include/linux/ppp_channel.h | 9 +++++
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net/l2tp/l2tp_ppp.c | 40 ++++++++++++++++++++-
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4 files changed, 113 insertions(+), 3 deletions(-)
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diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
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index 61eff7b85e0d..6cfc22ad6ebf 100644
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--- a/drivers/net/ppp/ppp_generic.c
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+++ b/drivers/net/ppp/ppp_generic.c
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@@ -48,6 +48,7 @@
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#include <net/slhc_vj.h>
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#include <linux/atomic.h>
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#include <linux/refcount.h>
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+#include <linux/if_pppox.h>
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#include <linux/nsproxy.h>
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#include <net/net_namespace.h>
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@@ -3485,6 +3486,8 @@ ppp_connect_channel(struct channel *pch, int unit)
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struct ppp_net *pn;
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int ret = -ENXIO;
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int hdrlen;
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+ int ppp_proto;
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+ int version;
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int notify = 0;
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pn = ppp_pernet(pch->chan_net);
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@@ -3518,10 +3521,37 @@ ppp_connect_channel(struct channel *pch, int unit)
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++ppp->n_channels;
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pch->ppp = ppp;
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refcount_inc(&ppp->file.refcnt);
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+
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+ ppp_proto = ppp_channel_get_protocol(pch->chan);
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+ switch (ppp_proto) {
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+ case PX_PROTO_OL2TP:
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+ version = ppp_channel_get_proto_version(pch->chan);
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+ switch (version) {
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+ case 2:
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+ ppp->dev->priv_flags_ext |= IFF_EXT_PPP_L2TPV2;
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+ ret = 0;
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+ break;
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+ case 3:
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+ ppp->dev->priv_flags_ext |= IFF_EXT_PPP_L2TPV3;
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+ ret = 0;
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+ break;
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+ default:
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+ break;
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+ }
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+ break;
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+
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+ case PX_PROTO_PPTP:
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+ ppp->dev->priv_flags_ext |= IFF_EXT_PPP_PPTP;
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+ ret = 0;
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+ break;
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+
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+ default:
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+ break;
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+ }
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+
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notify = 1;
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ppp_unlock(ppp);
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- ret = 0;
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outl:
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write_unlock_bh(&pch->upl);
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@@ -3768,6 +3798,18 @@ int ppp_channel_get_protocol(struct ppp_channel *chan)
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}
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EXPORT_SYMBOL(ppp_channel_get_protocol);
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+/* ppp_channel_get_proto_version()
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+ * Call this to get channel protocol version
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+ */
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+int ppp_channel_get_proto_version(struct ppp_channel *chan)
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+{
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+ if (!chan->ops->get_channel_protocol_ver)
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+ return -1;
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+
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+ return chan->ops->get_channel_protocol_ver(chan);
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+}
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+EXPORT_SYMBOL(ppp_channel_get_proto_version);
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+
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/* ppp_channel_hold()
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* Call this to hold a channel.
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*
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@@ -3921,6 +3963,28 @@ void ppp_release_channels(struct ppp_channel *channels[], unsigned int chan_sz)
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}
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EXPORT_SYMBOL(ppp_release_channels);
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+/* Check if ppp xmit lock is on hold */
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+bool ppp_is_xmit_locked(struct net_device *dev)
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+{
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+ struct ppp *ppp;
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+
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+ if (!dev)
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+ return false;
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+
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+ if (dev->type != ARPHRD_PPP)
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+ return false;
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+
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+ ppp = netdev_priv(dev);
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+ if (!ppp)
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+ return false;
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+
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+ if (spin_is_locked(&(ppp)->wlock))
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+ return true;
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+
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+ return false;
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+}
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+EXPORT_SYMBOL(ppp_is_xmit_locked);
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+
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/* Module/initialization stuff */
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module_init(ppp_init);
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diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
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index f4af16d44436..ed23cb82d12c 100644
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--- a/include/linux/netdevice.h
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+++ b/include/linux/netdevice.h
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@@ -2183,7 +2183,6 @@ struct net_device {
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unsigned char nested_level;
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#endif
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-
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/* Protocol-specific pointers */
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struct in_device __rcu *ip_ptr;
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diff --git a/include/linux/ppp_channel.h b/include/linux/ppp_channel.h
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index 249bf40cd18d..0dabc9dbc64d 100644
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--- a/include/linux/ppp_channel.h
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+++ b/include/linux/ppp_channel.h
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@@ -44,6 +44,8 @@ struct ppp_channel_ops {
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* the channel subtype
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*/
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int (*get_channel_protocol)(struct ppp_channel *);
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+ /* Get channel protocol version */
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+ int (*get_channel_protocol_ver)(struct ppp_channel *);
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/* Hold the channel from being destroyed */
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void (*hold)(struct ppp_channel *);
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/* Release hold on the channel */
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@@ -67,6 +69,9 @@ struct ppp_channel {
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*/
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extern int ppp_channel_get_protocol(struct ppp_channel *);
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+/* Call this get protocol version */
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+extern int ppp_channel_get_proto_version(struct ppp_channel *);
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+
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/* Call this to hold a channel */
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extern bool ppp_channel_hold(struct ppp_channel *);
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@@ -83,6 +88,10 @@ extern int ppp_hold_channels(struct net_device *dev,
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unsigned int chan_sz);
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bool ppp_is_cp_enabled(struct net_device *dev);
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+
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+/* Test if ppp xmit lock is locked */
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+extern bool ppp_is_xmit_locked(struct net_device *dev);
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+
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/* Hold PPP channels for the PPP device */
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extern int __ppp_hold_channels(struct net_device *dev,
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struct ppp_channel *channels[],
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diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
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index 943f499ec15f..b02d5b7da741 100644
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--- a/net/l2tp/l2tp_ppp.c
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+++ b/net/l2tp/l2tp_ppp.c
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@@ -92,6 +92,7 @@
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#include <net/ip.h>
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#include <net/udp.h>
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#include <net/inet_common.h>
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+#include <linux/if_pppox.h>
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#include <asm/byteorder.h>
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#include <linux/atomic.h>
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@@ -124,11 +125,13 @@ struct pppol2tp_session {
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static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb);
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static int pppol2tp_get_channel_protocol(struct ppp_channel *);
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+static int pppol2tp_get_channel_protocol_ver(struct ppp_channel *);
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static void pppol2tp_hold_chan(struct ppp_channel *);
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static void pppol2tp_release_chan(struct ppp_channel *);
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static const struct pppol2tp_channel_ops pppol2tp_chan_ops = {
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.ops.start_xmit = pppol2tp_xmit,
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.ops.get_channel_protocol = pppol2tp_get_channel_protocol,
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+ .ops.get_channel_protocol_ver = pppol2tp_get_channel_protocol_ver,
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.ops.hold = pppol2tp_hold_chan,
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.ops.release = pppol2tp_release_chan,
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};
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@@ -358,6 +361,40 @@ static int pppol2tp_get_channel_protocol(struct ppp_channel *chan)
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return PX_PROTO_OL2TP;
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}
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+/* pppol2tp_get_channel_protocol_ver()
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+ * Return the protocol version of the L2TP over PPP protocol
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+ */
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+static int pppol2tp_get_channel_protocol_ver(struct ppp_channel *chan)
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+{
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+ struct sock *sk;
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+ struct l2tp_session *session;
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+ struct l2tp_tunnel *tunnel;
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+ int version = 0;
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+
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+ if (!(chan && chan->private)) {
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+ return -1;
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+ }
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+
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+ sk = (struct sock *)chan->private;
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+
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+ /* Get session and tunnel contexts from the socket */
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+ session = pppol2tp_sock_to_session(sk);
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+ if (!session) {
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+ return -1;
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+ }
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+
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+ tunnel = session->tunnel;
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+ if (!tunnel) {
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+ sock_put(sk);
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+ return -1;
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+ }
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+
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+ version = tunnel->version;
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+
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+ sock_put(sk);
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+ return version;
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+}
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+
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/* pppol2tp_get_addressing() */
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static int pppol2tp_get_addressing(struct ppp_channel *chan,
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struct pppol2tp_common_addr *addr)
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@@ -443,7 +480,8 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
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skb->data[0] = PPP_ALLSTATIONS;
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skb->data[1] = PPP_UI;
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/* set incoming interface as the ppp interface */
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- if (skb->skb_iif)
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+ if ((skb->protocol == htons(ETH_P_IP)) ||
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+ (skb->protocol == htons(ETH_P_IPV6)))
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skb->skb_iif = ppp_dev_index(chan);
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local_bh_disable();
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--
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2.34.1
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