[ovs-dev] [PATCH] datapath: Remove CAPWAP tunneling support.
Pravin B Shelar
pshelar at nicira.com
Mon Feb 11 21:05:38 UTC 2013
The CAPWAP implementation is just the encapsulation format and
therefore really not the full protocol. While there were some
uses of it (primarily hardware support and UDP transport). But
these are most likely better provided by VXLAN.
Following patch removes CAPWAP tunneling support.
Signed-off-by: Pravin B Shelar <pshelar at nicira.com>
---
FAQ | 2 +-
NEWS | 1 +
README | 2 +-
datapath/CAPWAP.txt | 77 ----
datapath/Modules.mk | 5 +-
datapath/datapath.h | 1 -
datapath/linux/.gitignore | 1 -
datapath/tunnel.c | 4 -
datapath/tunnel.h | 8 -
datapath/vport-capwap.c | 849 -------------------------------------------
datapath/vport-capwap.h | 32 --
datapath/vport.c | 1 -
datapath/vport.h | 7 -
debian/changelog | 2 +-
include/linux/openvswitch.h | 1 -
lib/dpif-linux.c | 5 -
lib/netdev-vport.c | 5 -
vswitchd/vswitch.xml | 32 +--
18 files changed, 14 insertions(+), 1021 deletions(-)
delete mode 100644 datapath/CAPWAP.txt
delete mode 100644 datapath/vport-capwap.c
delete mode 100644 datapath/vport-capwap.h
diff --git a/FAQ b/FAQ
index e253b16..5ca6acd 100644
--- a/FAQ
+++ b/FAQ
@@ -167,7 +167,7 @@ Q: What features are not available in the Open vSwitch kernel datapath
A: The kernel module in upstream Linux 3.3 and later does not include
tunnel virtual ports, that is, interfaces with type "gre",
- "ipsec_gre", "gre64", "ipsec_gre64", "vxlan", or "capwap". It is
+ "ipsec_gre", "gre64", "ipsec_gre64", or "vxlan". It is
possible to create tunnels in Linux and attach them to Open vSwitch
as system devices. However, they cannot be dynamically created
through the OVSDB protocol or set the tunnel ids as a flow action.
diff --git a/NEWS b/NEWS
index 3a2b5fe..e703685 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,7 @@ post-v1.10.0
---------------------
- Stable bond mode has been removed.
- The autopath action has been removed.
+ - CAPWAP tunneling support removed.
v1.10.0 - xx xxx xxxx
diff --git a/README b/README
index dc5f05e..0973b3c 100644
--- a/README
+++ b/README
@@ -24,7 +24,7 @@ vSwitch supports the following features:
* NIC bonding with or without LACP on upstream switch
* NetFlow, sFlow(R), and mirroring for increased visibility
* QoS (Quality of Service) configuration, plus policing
- * GRE, GRE over IPSEC, CAPWAP, and VXLAN tunneling
+ * GRE, GRE over IPSEC, and VXLAN tunneling
* 802.1ag connectivity fault management
* OpenFlow 1.0 plus numerous extensions
* Transactional configuration database with C and Python bindings
diff --git a/datapath/CAPWAP.txt b/datapath/CAPWAP.txt
deleted file mode 100644
index 5ab6d53..0000000
--- a/datapath/CAPWAP.txt
+++ /dev/null
@@ -1,77 +0,0 @@
-
-References:
-* http://www.rfc-editor.org/rfc/rfc5415.txt
-
-
-The CAPWAP header layout is summarized as follows:
-
-
- 0 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |CAPWAP Preamble| HLEN | RID | WBID |T|F|L|W|M|K|Flags|
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Fragment ID | Frag Offset |Rsvd |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | (optional) Radio MAC Address |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | (optional) Wireless Specific Information |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Payload .... |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-The spec defines an optional Wireless Specific Information field which can be
-used to pass arbitrary data in the encapsulation layer:
-
- Wireless Specific Information: This optional field may be used to carry
- per-packet information. This field is only present if the
- 'W' bit is set. The WBID field in the CAPWAP Header is used to
- identify the format of the WSI optional field. The HLEN field assumes
- 4-byte alignment, and this field MUST be padded with zeroes (0x00) if it
- is not 4-byte aligned.
-
- The Wireless-Specific Information field uses the following format:
-
- 0 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Length | Data...
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
- Length: The 8-bit field contains the length of the data field,
- with a maximum size of 255.
-
- Data: Wireless-specific information, defined by the wireless-
- specific binding specified in the CAPWAP Header's WBID field.
-
-
- WBID: A 5-bit field that is the wireless binding identifier. The
- identifier will indicate the type of wireless packet associated
- with the radio. The following values are defined:
-
- 0 - Reserved
- 1 - IEEE 802.11
- 2 - Reserved
- 3 - EPCGlobal [EPCGlobal]
-
- When Open vSwitch uses this field, it writes the value:
- 30 - Open vSwitch data
-
-
-Open vSwitch can make use of this field to pass additional packet routing
-information. When needed, it sets the 'W' bit to indicates the WSI field is
-added, and fills the field as follows:
-
- 0 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | WSI_LEN |K| Flags | Reserved |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | (optional) 64bit Tunnel Key |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
- K - flag bit to identify presence of a 64bit tunnel key.
-
-
-Adding WSI fields: Fields must be written and read in consitent order. New
-fields may be added, but the existing fields always come first.
diff --git a/datapath/Modules.mk b/datapath/Modules.mk
index 54c6f13..d04750b 100644
--- a/datapath/Modules.mk
+++ b/datapath/Modules.mk
@@ -16,7 +16,6 @@ openvswitch_sources = \
tunnel.c \
vlan.c \
vport.c \
- vport-capwap.c \
vport-gre.c \
vport-internal_dev.c \
vport-netdev.c \
@@ -31,13 +30,11 @@ openvswitch_headers = \
tunnel.h \
vlan.h \
vport.h \
- vport-capwap.h \
vport-internal_dev.h \
vport-netdev.h
openvswitch_extras = \
- README \
- CAPWAP.txt
+ README
dist_sources = $(foreach module,$(dist_modules),$($(module)_sources))
dist_headers = $(foreach module,$(dist_modules),$($(module)_headers))
diff --git a/datapath/datapath.h b/datapath/datapath.h
index 2b93348..c24a55f 100644
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -141,7 +141,6 @@ struct dp_upcall_info {
*/
struct ovs_net {
struct list_head dps;
- struct vport_net vport_net;
};
extern int ovs_net_id;
diff --git a/datapath/linux/.gitignore b/datapath/linux/.gitignore
index 901b2a8..d5d063a 100644
--- a/datapath/linux/.gitignore
+++ b/datapath/linux/.gitignore
@@ -31,7 +31,6 @@
/tmp
/tunnel.c
/vlan.c
-/vport-capwap.c
/vport-generic.c
/vport-gre.c
/vport-internal_dev.c
diff --git a/datapath/tunnel.c b/datapath/tunnel.c
index 7c2560f..a81f4c4 100644
--- a/datapath/tunnel.c
+++ b/datapath/tunnel.c
@@ -799,7 +799,6 @@ struct vport *ovs_tnl_create(const struct vport_parms *parms,
struct vport *vport;
struct tnl_vport *tnl_vport;
struct tnl_mutable_config *mutable;
- int initial_frag_id;
int err;
vport = ovs_vport_alloc(sizeof(struct tnl_vport), vport_ops, parms);
@@ -819,9 +818,6 @@ struct vport *ovs_tnl_create(const struct vport_parms *parms,
goto error_free_vport;
}
- get_random_bytes(&initial_frag_id, sizeof(int));
- atomic_set(&tnl_vport->frag_id, initial_frag_id);
-
err = tnl_set_config(ovs_dp_get_net(parms->dp), parms->options, tnl_ops,
NULL, mutable);
if (err)
diff --git a/datapath/tunnel.h b/datapath/tunnel.h
index 7e4d1a6..b43ef40 100644
--- a/datapath/tunnel.h
+++ b/datapath/tunnel.h
@@ -41,7 +41,6 @@
*/
#define TNL_T_PROTO_GRE 0
#define TNL_T_PROTO_GRE64 1
-#define TNL_T_PROTO_CAPWAP 2
#define TNL_T_PROTO_VXLAN 3
/* These flags are only needed when calling tnl_find_port(). */
@@ -147,13 +146,6 @@ struct tnl_vport {
const struct tnl_ops *tnl_ops;
struct tnl_mutable_config __rcu *mutable;
-
- /*
- * ID of last fragment sent (for tunnel protocols with direct support
- * fragmentation). If the protocol relies on IP fragmentation then
- * this is not needed.
- */
- atomic_t frag_id;
};
struct vport *ovs_tnl_create(const struct vport_parms *, const struct vport_ops *,
diff --git a/datapath/vport-capwap.c b/datapath/vport-capwap.c
deleted file mode 100644
index 1230682..0000000
--- a/datapath/vport-capwap.c
+++ /dev/null
@@ -1,849 +0,0 @@
-/*
- * Copyright (c) 2007-2012 Nicira, Inc.
- * Distributed under the terms of the GNU GPL version 2.
- *
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/version.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
-
-#include <linux/if.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/list.h>
-#include <linux/net.h>
-#include <net/net_namespace.h>
-
-#include <net/icmp.h>
-#include <net/inet_frag.h>
-#include <net/ip.h>
-#include <net/protocol.h>
-#include <net/udp.h>
-
-#include "datapath.h"
-#include "tunnel.h"
-#include "vport.h"
-
-#define CAPWAP_SRC_PORT 58881
-#define CAPWAP_DST_PORT 58882
-
-#define CAPWAP_FRAG_TIMEOUT (30 * HZ)
-#define CAPWAP_FRAG_MAX_MEM (256 * 1024)
-#define CAPWAP_FRAG_PRUNE_MEM (192 * 1024)
-#define CAPWAP_FRAG_SECRET_INTERVAL (10 * 60 * HZ)
-
-/*
- * The CAPWAP header is a mess, with all kinds of odd size bit fields that
- * cross byte boundaries, which are difficult to represent correctly in
- * various byte orderings. Luckily we only care about a few permutations, so
- * statically create them and we can do very fast parsing by checking all 12
- * fields in one go.
- */
-#define CAPWAP_PREAMBLE_MASK __cpu_to_be32(0xFF000000)
-#define CAPWAP_HLEN_SHIFT 17
-#define CAPWAP_HLEN_MASK __cpu_to_be32(0x00F80000)
-#define CAPWAP_RID_MASK __cpu_to_be32(0x0007C000)
-#define CAPWAP_WBID_MASK __cpu_to_be32(0x00003E00)
-#define CAPWAP_F_MASK __cpu_to_be32(0x000001FF)
-
-#define CAPWAP_F_FRAG __cpu_to_be32(0x00000080)
-#define CAPWAP_F_LASTFRAG __cpu_to_be32(0x00000040)
-#define CAPWAP_F_WSI __cpu_to_be32(0x00000020)
-#define CAPWAP_F_RMAC __cpu_to_be32(0x00000010)
-
-#define CAPWAP_RMAC_LEN 4
-
-/* Standard CAPWAP looks for a WBID value of 2.
- * When we insert WSI field, use WBID value of 30, which has been
- * proposed for all "experimental" usage - users with no reserved WBID value
- * of their own.
-*/
-#define CAPWAP_WBID_30 __cpu_to_be32(0x00003C00)
-#define CAPWAP_WBID_2 __cpu_to_be32(0x00000200)
-
-#define FRAG_HDR (CAPWAP_F_FRAG)
-#define FRAG_LAST_HDR (FRAG_HDR | CAPWAP_F_LASTFRAG)
-
-/* Keyed packet, WBID 30, and length long enough to include WSI key */
-#define CAPWAP_KEYED (CAPWAP_WBID_30 | CAPWAP_F_WSI | htonl(20 << CAPWAP_HLEN_SHIFT))
-/* A backward-compatible packet, WBID 2 and length of 2 words (no WSI fields) */
-#define CAPWAP_NO_WSI (CAPWAP_WBID_2 | htonl(8 << CAPWAP_HLEN_SHIFT))
-
-/* Mask for all parts of header that must be 0. */
-#define CAPWAP_ZERO_MASK (CAPWAP_PREAMBLE_MASK | \
- (CAPWAP_F_MASK ^ (CAPWAP_F_WSI | CAPWAP_F_FRAG | CAPWAP_F_LASTFRAG | CAPWAP_F_RMAC)))
-
-struct capwaphdr {
- __be32 begin;
- __be16 frag_id;
- /* low 3 bits of frag_off are reserved */
- __be16 frag_off;
-};
-
-/*
- * We use the WSI field to hold additional tunnel data.
- * The first eight bits store the size of the wsi data in bytes.
- */
-struct capwaphdr_wsi {
- u8 wsi_len;
- u8 flags;
- __be16 reserved_padding;
-};
-
-struct capwaphdr_wsi_key {
- __be64 key;
-};
-
-/* Flag indicating a 64bit key is stored in WSI data field */
-#define CAPWAP_WSI_F_KEY64 0x80
-
-static struct capwaphdr *capwap_hdr(const struct sk_buff *skb)
-{
- return (struct capwaphdr *)(udp_hdr(skb) + 1);
-}
-
-/*
- * The fragment offset is actually the high 13 bits of the last 16 bit field,
- * so we would normally need to right shift 3 places. However, it stores the
- * offset in 8 byte chunks, which would involve a 3 place left shift. So we
- * just mask off the last 3 bits and be done with it.
- */
-#define FRAG_OFF_MASK (~0x7U)
-
-/*
- * The minimum header length. The header may be longer if the optional
- * WSI field is used.
- */
-#define CAPWAP_MIN_HLEN (sizeof(struct udphdr) + sizeof(struct capwaphdr))
-
-struct frag_match {
- __be32 saddr;
- __be32 daddr;
- __be16 id;
-};
-
-struct frag_queue {
- struct inet_frag_queue ifq;
- struct frag_match match;
-};
-
-struct frag_skb_cb {
- u16 offset;
-};
-#define FRAG_CB(skb) ((struct frag_skb_cb *)(skb)->cb)
-
-static struct sk_buff *fragment(struct sk_buff *, const struct vport *,
- struct dst_entry *dst, unsigned int hlen);
-static struct sk_buff *defrag(struct sk_buff *, bool frag_last);
-
-static void capwap_frag_init(struct inet_frag_queue *, void *match);
-static unsigned int capwap_frag_hash(struct inet_frag_queue *);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
-static int capwap_frag_match(struct inet_frag_queue *, void *match);
-#else
-static bool capwap_frag_match(struct inet_frag_queue *, void *match);
-#endif
-static void capwap_frag_expire(unsigned long ifq);
-
-static struct inet_frags frag_state = {
- .constructor = capwap_frag_init,
- .qsize = sizeof(struct frag_queue),
- .hashfn = capwap_frag_hash,
- .match = capwap_frag_match,
- .frag_expire = capwap_frag_expire,
- .secret_interval = CAPWAP_FRAG_SECRET_INTERVAL,
-};
-
-static int capwap_hdr_len(const struct tnl_mutable_config *mutable,
- const struct ovs_key_ipv4_tunnel *tun_key)
-{
- int size = CAPWAP_MIN_HLEN;
- u32 flags;
- __be64 out_key;
-
- tnl_get_param(mutable, tun_key, &flags, &out_key);
-
- /* CAPWAP has no checksums. */
- if (flags & TNL_F_CSUM)
- return -EINVAL;
-
- /* if keys are specified, then add WSI field */
- if (out_key || (flags & TNL_F_OUT_KEY_ACTION)) {
- size += sizeof(struct capwaphdr_wsi) +
- sizeof(struct capwaphdr_wsi_key);
- }
-
- return size;
-}
-
-static struct sk_buff *capwap_build_header(const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- struct dst_entry *dst,
- struct sk_buff *skb,
- int tunnel_hlen)
-{
- struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->tun_key;
- struct udphdr *udph = udp_hdr(skb);
- struct capwaphdr *cwh = (struct capwaphdr *)(udph + 1);
- u32 flags;
- __be64 out_key;
-
- tnl_get_param(mutable, tun_key, &flags, &out_key);
-
- udph->source = htons(CAPWAP_SRC_PORT);
- udph->dest = htons(CAPWAP_DST_PORT);
- udph->check = 0;
-
- cwh->frag_id = 0;
- cwh->frag_off = 0;
-
- if (out_key || flags & TNL_F_OUT_KEY_ACTION) {
- /* first field in WSI is key */
- struct capwaphdr_wsi *wsi = (struct capwaphdr_wsi *)(cwh + 1);
-
- cwh->begin = CAPWAP_KEYED;
-
- /* -1 for wsi_len byte, not included in length as per spec */
- wsi->wsi_len = sizeof(struct capwaphdr_wsi) - 1
- + sizeof(struct capwaphdr_wsi_key);
- wsi->flags = CAPWAP_WSI_F_KEY64;
- wsi->reserved_padding = 0;
-
- if (out_key) {
- struct capwaphdr_wsi_key *opt = (struct capwaphdr_wsi_key *)(wsi + 1);
- opt->key = out_key;
- }
- } else {
- /* make packet readable by old capwap code */
- cwh->begin = CAPWAP_NO_WSI;
- }
- udph->len = htons(skb->len - skb_transport_offset(skb));
-
- if (unlikely(skb->len - skb_network_offset(skb) > dst_mtu(dst))) {
- unsigned int hlen = skb_transport_offset(skb) + capwap_hdr_len(mutable, tun_key);
- skb = fragment(skb, vport, dst, hlen);
- }
-
- return skb;
-}
-
-static int process_capwap_wsi(struct sk_buff *skb, __be64 *key, bool *key_present)
-{
- struct capwaphdr *cwh = capwap_hdr(skb);
- struct capwaphdr_wsi *wsi;
- int hdr_len;
- int rmac_len = 0;
- int wsi_len;
-
- if (((cwh->begin & CAPWAP_WBID_MASK) != CAPWAP_WBID_30))
- return 0;
-
- if (cwh->begin & CAPWAP_F_RMAC)
- rmac_len = CAPWAP_RMAC_LEN;
-
- hdr_len = ntohl(cwh->begin & CAPWAP_HLEN_MASK) >> CAPWAP_HLEN_SHIFT;
-
- if (unlikely(sizeof(struct capwaphdr) + rmac_len + sizeof(struct capwaphdr_wsi) > hdr_len))
- return -EINVAL;
-
- /* read wsi header to find out how big it really is */
- wsi = (struct capwaphdr_wsi *)((u8 *)(cwh + 1) + rmac_len);
- /* +1 for length byte not included in wsi_len */
- wsi_len = 1 + wsi->wsi_len;
-
- if (unlikely(sizeof(struct capwaphdr) + rmac_len + wsi_len != hdr_len))
- return -EINVAL;
-
- wsi_len -= sizeof(struct capwaphdr_wsi);
-
- if (wsi->flags & CAPWAP_WSI_F_KEY64) {
- struct capwaphdr_wsi_key *opt;
-
- if (unlikely(wsi_len < sizeof(struct capwaphdr_wsi_key)))
- return -EINVAL;
-
- opt = (struct capwaphdr_wsi_key *)(wsi + 1);
- *key = opt->key;
- *key_present = true;
- } else {
- *key_present = false;
- }
-
- return 0;
-}
-
-static struct sk_buff *process_capwap_proto(struct sk_buff *skb, __be64 *key, bool *key_present)
-{
- struct capwaphdr *cwh = capwap_hdr(skb);
- int hdr_len = sizeof(struct udphdr);
-
- if (unlikely((cwh->begin & CAPWAP_ZERO_MASK) != 0))
- goto error;
-
- hdr_len += ntohl(cwh->begin & CAPWAP_HLEN_MASK) >> CAPWAP_HLEN_SHIFT;
- if (unlikely(hdr_len < CAPWAP_MIN_HLEN))
- goto error;
-
- if (unlikely(!pskb_may_pull(skb, hdr_len + ETH_HLEN)))
- goto error;
-
- cwh = capwap_hdr(skb);
- __skb_pull(skb, hdr_len);
- skb_postpull_rcsum(skb, skb_transport_header(skb), hdr_len + ETH_HLEN);
-
- if (cwh->begin & CAPWAP_F_FRAG) {
- skb = defrag(skb, (__force bool)(cwh->begin & CAPWAP_F_LASTFRAG));
- if (!skb)
- return NULL;
- cwh = capwap_hdr(skb);
- }
-
- if ((cwh->begin & CAPWAP_F_WSI) && process_capwap_wsi(skb, key, key_present))
- goto error;
-
- return skb;
-error:
- kfree_skb(skb);
- return NULL;
-}
-
-/* Called with rcu_read_lock and BH disabled. */
-static int capwap_rcv(struct sock *sk, struct sk_buff *skb)
-{
- struct vport *vport;
- const struct tnl_mutable_config *mutable;
- struct iphdr *iph;
- struct ovs_key_ipv4_tunnel tun_key;
- __be64 key = 0;
- bool key_present = false;
-
- if (unlikely(!pskb_may_pull(skb, CAPWAP_MIN_HLEN + ETH_HLEN)))
- goto error;
-
- skb = process_capwap_proto(skb, &key, &key_present);
- if (unlikely(!skb))
- goto out;
-
- iph = ip_hdr(skb);
- vport = ovs_tnl_find_port(sock_net(sk), iph->daddr, iph->saddr, key,
- TNL_T_PROTO_CAPWAP, &mutable);
- if (unlikely(!vport))
- goto error;
-
- if (key_present && mutable->key.daddr &&
- !(mutable->flags & TNL_F_IN_KEY_MATCH)) {
- key_present = false;
- key = 0;
- }
-
- tnl_tun_key_init(&tun_key, iph, key, key_present ? OVS_TNL_F_KEY : 0);
- OVS_CB(skb)->tun_key = &tun_key;
-
- ovs_tnl_rcv(vport, skb);
- goto out;
-
-error:
- kfree_skb(skb);
-out:
- return 0;
-}
-
-static const struct tnl_ops capwap_tnl_ops = {
- .tunnel_type = TNL_T_PROTO_CAPWAP,
- .ipproto = IPPROTO_UDP,
- .hdr_len = capwap_hdr_len,
- .build_header = capwap_build_header,
-};
-
-static inline struct capwap_net *ovs_get_capwap_net(struct net *net)
-{
- struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
- return &ovs_net->vport_net.capwap;
-}
-
-/* Arbitrary value. Irrelevant as long as it's not 0 since we set the handler. */
-#define UDP_ENCAP_CAPWAP 10
-static int init_socket(struct net *net)
-{
- int err;
- struct capwap_net *capwap_net = ovs_get_capwap_net(net);
- struct sockaddr_in sin;
-
- if (capwap_net->n_tunnels) {
- capwap_net->n_tunnels++;
- return 0;
- }
-
- err = sock_create_kern(AF_INET, SOCK_DGRAM, 0,
- &capwap_net->capwap_rcv_socket);
- if (err)
- goto error;
-
- /* release net ref. */
- sk_change_net(capwap_net->capwap_rcv_socket->sk, net);
-
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = htonl(INADDR_ANY);
- sin.sin_port = htons(CAPWAP_DST_PORT);
-
- err = kernel_bind(capwap_net->capwap_rcv_socket,
- (struct sockaddr *)&sin,
- sizeof(struct sockaddr_in));
- if (err)
- goto error_sock;
-
- udp_sk(capwap_net->capwap_rcv_socket->sk)->encap_type = UDP_ENCAP_CAPWAP;
- udp_sk(capwap_net->capwap_rcv_socket->sk)->encap_rcv = capwap_rcv;
-
- capwap_net->frag_state.timeout = CAPWAP_FRAG_TIMEOUT;
- capwap_net->frag_state.high_thresh = CAPWAP_FRAG_MAX_MEM;
- capwap_net->frag_state.low_thresh = CAPWAP_FRAG_PRUNE_MEM;
-
- inet_frags_init_net(&capwap_net->frag_state);
- udp_encap_enable();
- capwap_net->n_tunnels++;
- return 0;
-
-error_sock:
- sk_release_kernel(capwap_net->capwap_rcv_socket->sk);
-error:
- pr_warn("cannot register capwap protocol handler : %d\n", err);
- return err;
-}
-
-static void release_socket(struct net *net)
-{
- struct capwap_net *capwap_net = ovs_get_capwap_net(net);
-
- capwap_net->n_tunnels--;
- if (capwap_net->n_tunnels)
- return;
-
- inet_frags_exit_net(&capwap_net->frag_state, &frag_state);
- sk_release_kernel(capwap_net->capwap_rcv_socket->sk);
-}
-
-static struct vport *capwap_create(const struct vport_parms *parms)
-{
- struct vport *vport;
- int err;
-
- err = init_socket(ovs_dp_get_net(parms->dp));
- if (err)
- return ERR_PTR(err);
-
- vport = ovs_tnl_create(parms, &ovs_capwap_vport_ops, &capwap_tnl_ops);
- if (IS_ERR(vport))
- release_socket(ovs_dp_get_net(parms->dp));
-
- return vport;
-}
-
-static void capwap_destroy(struct vport *vport)
-{
- ovs_tnl_destroy(vport);
- release_socket(ovs_dp_get_net(vport->dp));
-}
-
-static int capwap_init(void)
-{
- inet_frags_init(&frag_state);
- return 0;
-}
-
-static void capwap_exit(void)
-{
- inet_frags_fini(&frag_state);
-}
-
-static void copy_skb_metadata(struct sk_buff *from, struct sk_buff *to)
-{
- to->pkt_type = from->pkt_type;
- to->priority = from->priority;
- to->protocol = from->protocol;
- skb_dst_set(to, dst_clone(skb_dst(from)));
- to->dev = from->dev;
- to->mark = from->mark;
-
- if (from->sk)
- skb_set_owner_w(to, from->sk);
-
-#ifdef CONFIG_NET_SCHED
- to->tc_index = from->tc_index;
-#endif
-#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
- to->ipvs_property = from->ipvs_property;
-#endif
- skb_copy_secmark(to, from);
-}
-
-static struct sk_buff *fragment(struct sk_buff *skb, const struct vport *vport,
- struct dst_entry *dst, unsigned int hlen)
-{
- struct tnl_vport *tnl_vport = tnl_vport_priv(vport);
- unsigned int headroom;
- unsigned int max_frame_len = dst_mtu(dst) + skb_network_offset(skb);
- struct sk_buff *result = NULL, *list_cur = NULL;
- unsigned int remaining;
- unsigned int offset;
- __be16 frag_id;
-
- if (hlen + ~FRAG_OFF_MASK + 1 > max_frame_len) {
- if (net_ratelimit())
- pr_warn("capwap link mtu (%d) is less than minimum packet (%d)\n",
- dst_mtu(dst),
- hlen - skb_network_offset(skb) + ~FRAG_OFF_MASK + 1);
- goto error;
- }
-
- remaining = skb->len - hlen;
- offset = 0;
- frag_id = htons(atomic_inc_return(&tnl_vport->frag_id));
-
- headroom = dst->header_len + 16;
- if (!skb_network_offset(skb))
- headroom += LL_RESERVED_SPACE(dst->dev);
-
- while (remaining) {
- struct sk_buff *skb2;
- int frag_size;
- struct udphdr *udph;
- struct capwaphdr *cwh;
-
- frag_size = min(remaining, max_frame_len - hlen);
- if (remaining > frag_size)
- frag_size &= FRAG_OFF_MASK;
-
- skb2 = alloc_skb(headroom + hlen + frag_size, GFP_ATOMIC);
- if (!skb2)
- goto error;
-
- skb_reserve(skb2, headroom);
- __skb_put(skb2, hlen + frag_size);
-
- if (skb_network_offset(skb))
- skb_reset_mac_header(skb2);
- skb_set_network_header(skb2, skb_network_offset(skb));
- skb_set_transport_header(skb2, skb_transport_offset(skb));
-
- /* Copy (Ethernet)/IP/UDP/CAPWAP header. */
- copy_skb_metadata(skb, skb2);
- skb_copy_from_linear_data(skb, skb2->data, hlen);
-
- /* Copy this data chunk. */
- if (skb_copy_bits(skb, hlen + offset, skb2->data + hlen, frag_size))
- BUG();
-
- udph = udp_hdr(skb2);
- udph->len = htons(skb2->len - skb_transport_offset(skb2));
-
- cwh = capwap_hdr(skb2);
- if (remaining > frag_size)
- cwh->begin |= FRAG_HDR;
- else
- cwh->begin |= FRAG_LAST_HDR;
- cwh->frag_id = frag_id;
- cwh->frag_off = htons(offset);
-
- if (result) {
- list_cur->next = skb2;
- list_cur = skb2;
- } else
- result = list_cur = skb2;
-
- offset += frag_size;
- remaining -= frag_size;
- }
-
- consume_skb(skb);
- return result;
-
-error:
- ovs_tnl_free_linked_skbs(result);
- kfree_skb(skb);
- return NULL;
-}
-
-/* All of the following functions relate to fragmentation reassembly. */
-
-static struct frag_queue *ifq_cast(struct inet_frag_queue *ifq)
-{
- return container_of(ifq, struct frag_queue, ifq);
-}
-
-static u32 frag_hash(struct frag_match *match)
-{
- return jhash_3words((__force u16)match->id, (__force u32)match->saddr,
- (__force u32)match->daddr,
- frag_state.rnd) & (INETFRAGS_HASHSZ - 1);
-}
-
-static struct frag_queue *queue_find(struct netns_frags *ns_frag_state,
- struct frag_match *match)
-{
- struct inet_frag_queue *ifq;
-
- read_lock(&frag_state.lock);
-
- ifq = inet_frag_find(ns_frag_state, &frag_state, match, frag_hash(match));
- if (!ifq)
- return NULL;
-
- /* Unlock happens inside inet_frag_find(). */
-
- return ifq_cast(ifq);
-}
-
-static struct sk_buff *frag_reasm(struct frag_queue *fq, struct net_device *dev)
-{
- struct sk_buff *head = fq->ifq.fragments;
- struct sk_buff *frag;
-
- /* Succeed or fail, we're done with this queue. */
- inet_frag_kill(&fq->ifq, &frag_state);
-
- if (fq->ifq.len > 65535)
- return NULL;
-
- /* Can't have the head be a clone. */
- if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC))
- return NULL;
-
- /*
- * We're about to build frag list for this SKB. If it already has a
- * frag list, alloc a new SKB and put the existing frag list there.
- */
- if (skb_shinfo(head)->frag_list) {
- int i;
- int paged_len = 0;
-
- frag = alloc_skb(0, GFP_ATOMIC);
- if (!frag)
- return NULL;
-
- frag->next = head->next;
- head->next = frag;
- skb_shinfo(frag)->frag_list = skb_shinfo(head)->frag_list;
- skb_shinfo(head)->frag_list = NULL;
-
- for (i = 0; i < skb_shinfo(head)->nr_frags; i++)
- paged_len += skb_shinfo(head)->frags[i].size;
- frag->len = frag->data_len = head->data_len - paged_len;
- head->data_len -= frag->len;
- head->len -= frag->len;
-
- frag->ip_summed = head->ip_summed;
- atomic_add(frag->truesize, &fq->ifq.net->mem);
- }
-
- skb_shinfo(head)->frag_list = head->next;
- atomic_sub(head->truesize, &fq->ifq.net->mem);
-
- /* Properly account for data in various packets. */
- for (frag = head->next; frag; frag = frag->next) {
- head->data_len += frag->len;
- head->len += frag->len;
-
- if (head->ip_summed != frag->ip_summed)
- head->ip_summed = CHECKSUM_NONE;
- else if (head->ip_summed == CHECKSUM_COMPLETE)
- head->csum = csum_add(head->csum, frag->csum);
-
- head->truesize += frag->truesize;
- atomic_sub(frag->truesize, &fq->ifq.net->mem);
- }
-
- head->next = NULL;
- head->dev = dev;
- head->tstamp = fq->ifq.stamp;
- fq->ifq.fragments = NULL;
-
- return head;
-}
-
-static struct sk_buff *frag_queue(struct frag_queue *fq, struct sk_buff *skb,
- u16 offset, bool frag_last)
-{
- struct sk_buff *prev, *next;
- struct net_device *dev;
- int end;
-
- if (fq->ifq.last_in & INET_FRAG_COMPLETE)
- goto error;
-
- if (!skb->len)
- goto error;
-
- end = offset + skb->len;
-
- if (frag_last) {
- /*
- * Last fragment, shouldn't already have data past our end or
- * have another last fragment.
- */
- if (end < fq->ifq.len || fq->ifq.last_in & INET_FRAG_LAST_IN)
- goto error;
-
- fq->ifq.last_in |= INET_FRAG_LAST_IN;
- fq->ifq.len = end;
- } else {
- /* Fragments should align to 8 byte chunks. */
- if (end & ~FRAG_OFF_MASK)
- goto error;
-
- if (end > fq->ifq.len) {
- /*
- * Shouldn't have data past the end, if we already
- * have one.
- */
- if (fq->ifq.last_in & INET_FRAG_LAST_IN)
- goto error;
-
- fq->ifq.len = end;
- }
- }
-
- /* Find where we fit in. */
- prev = NULL;
- for (next = fq->ifq.fragments; next != NULL; next = next->next) {
- if (FRAG_CB(next)->offset >= offset)
- break;
- prev = next;
- }
-
- /*
- * Overlapping fragments aren't allowed. We shouldn't start before
- * the end of the previous fragment.
- */
- if (prev && FRAG_CB(prev)->offset + prev->len > offset)
- goto error;
-
- /* We also shouldn't end after the beginning of the next fragment. */
- if (next && end > FRAG_CB(next)->offset)
- goto error;
-
- FRAG_CB(skb)->offset = offset;
-
- /* Link into list. */
- skb->next = next;
- if (prev)
- prev->next = skb;
- else
- fq->ifq.fragments = skb;
-
- dev = skb->dev;
- skb->dev = NULL;
-
- fq->ifq.stamp = skb->tstamp;
- fq->ifq.meat += skb->len;
- atomic_add(skb->truesize, &fq->ifq.net->mem);
- if (offset == 0)
- fq->ifq.last_in |= INET_FRAG_FIRST_IN;
-
- /* If we have all fragments do reassembly. */
- if (fq->ifq.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
- fq->ifq.meat == fq->ifq.len)
- return frag_reasm(fq, dev);
-
- write_lock(&frag_state.lock);
- list_move_tail(&fq->ifq.lru_list, &fq->ifq.net->lru_list);
- write_unlock(&frag_state.lock);
-
- return NULL;
-
-error:
- kfree_skb(skb);
- return NULL;
-}
-
-static struct sk_buff *defrag(struct sk_buff *skb, bool frag_last)
-{
- struct iphdr *iph = ip_hdr(skb);
- struct capwaphdr *cwh = capwap_hdr(skb);
- struct capwap_net *capwap_net = ovs_get_capwap_net(dev_net(skb->dev));
- struct netns_frags *ns_frag_state = &capwap_net->frag_state;
- struct frag_match match;
- u16 frag_off;
- struct frag_queue *fq;
-
- inet_frag_evictor(ns_frag_state, &frag_state, false);
-
- match.daddr = iph->daddr;
- match.saddr = iph->saddr;
- match.id = cwh->frag_id;
- frag_off = ntohs(cwh->frag_off) & FRAG_OFF_MASK;
-
- fq = queue_find(ns_frag_state, &match);
- if (fq) {
- spin_lock(&fq->ifq.lock);
- skb = frag_queue(fq, skb, frag_off, frag_last);
- spin_unlock(&fq->ifq.lock);
-
- inet_frag_put(&fq->ifq, &frag_state);
-
- return skb;
- }
-
- kfree_skb(skb);
- return NULL;
-}
-
-static void capwap_frag_init(struct inet_frag_queue *ifq, void *match_)
-{
- struct frag_match *match = match_;
-
- ifq_cast(ifq)->match = *match;
-}
-
-static unsigned int capwap_frag_hash(struct inet_frag_queue *ifq)
-{
- return frag_hash(&ifq_cast(ifq)->match);
-}
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
-static int capwap_frag_match(struct inet_frag_queue *ifq, void *a_)
-#else
-static bool capwap_frag_match(struct inet_frag_queue *ifq, void *a_)
-#endif
-{
- struct frag_match *a = a_;
- struct frag_match *b = &ifq_cast(ifq)->match;
-
- return a->id == b->id && a->saddr == b->saddr && a->daddr == b->daddr;
-}
-
-/* Run when the timeout for a given queue expires. */
-static void capwap_frag_expire(unsigned long ifq)
-{
- struct frag_queue *fq;
-
- fq = ifq_cast((struct inet_frag_queue *)ifq);
-
- spin_lock(&fq->ifq.lock);
-
- if (!(fq->ifq.last_in & INET_FRAG_COMPLETE))
- inet_frag_kill(&fq->ifq, &frag_state);
-
- spin_unlock(&fq->ifq.lock);
- inet_frag_put(&fq->ifq, &frag_state);
-}
-
-const struct vport_ops ovs_capwap_vport_ops = {
- .type = OVS_VPORT_TYPE_CAPWAP,
- .flags = VPORT_F_TUN_ID,
- .init = capwap_init,
- .exit = capwap_exit,
- .create = capwap_create,
- .destroy = capwap_destroy,
- .get_name = ovs_tnl_get_name,
- .get_options = ovs_tnl_get_options,
- .set_options = ovs_tnl_set_options,
- .send = ovs_tnl_send,
-};
-#else
-#warning CAPWAP tunneling will not be available on kernels before 2.6.26
-#endif /* Linux kernel < 2.6.26 */
diff --git a/datapath/vport-capwap.h b/datapath/vport-capwap.h
deleted file mode 100644
index 5c0a6f8..0000000
--- a/datapath/vport-capwap.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (c) 2012 Nicira, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License 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 Street, Fifth Floor, Boston, MA
- * 02110-1301, USA
- */
-
-#ifndef VPORT_CAPWAP_H
-#define VPORT_CAPWAP_H 1
-
-#include <linux/net.h>
-
-struct capwap_net {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- struct socket *capwap_rcv_socket;
- struct netns_frags frag_state;
- int n_tunnels;
-#endif
-};
-
-#endif /* vport-capwap.h */
diff --git a/datapath/vport.c b/datapath/vport.c
index 9c0942b..149201c 100644
--- a/datapath/vport.c
+++ b/datapath/vport.c
@@ -42,7 +42,6 @@ static const struct vport_ops *base_vport_ops_list[] = {
&ovs_gre_vport_ops,
&ovs_gre64_vport_ops,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- &ovs_capwap_vport_ops,
&ovs_vxlan_vport_ops,
#endif
};
diff --git a/datapath/vport.h b/datapath/vport.h
index ed089a9..57662ee 100644
--- a/datapath/vport.h
+++ b/datapath/vport.h
@@ -26,15 +26,9 @@
#include <linux/spinlock.h>
#include <linux/u64_stats_sync.h>
-#include "vport-capwap.h"
-
struct vport;
struct vport_parms;
-struct vport_net {
- struct capwap_net capwap;
-};
-
/* The following definitions are for users of the vport subsytem: */
int ovs_vport_init(void);
@@ -230,7 +224,6 @@ extern const struct vport_ops ovs_netdev_vport_ops;
extern const struct vport_ops ovs_internal_vport_ops;
extern const struct vport_ops ovs_gre_vport_ops;
extern const struct vport_ops ovs_gre64_vport_ops;
-extern const struct vport_ops ovs_capwap_vport_ops;
extern const struct vport_ops ovs_vxlan_vport_ops;
#endif /* vport.h */
diff --git a/debian/changelog b/debian/changelog
index 95f09be..33067f0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,7 +1,7 @@
openvswitch (1.10.90-1) unstable; urgency=low
[ Open vSwitch team ]
* New upstream version
- - Nothing yet! Try NEWS...
+ - CAPWAP tunneling support removed.
-- Open vSwitch team <dev at openvswitch.org> Mon, 04 Feb 2013 21:52:34 -0700
diff --git a/include/linux/openvswitch.h b/include/linux/openvswitch.h
index 7c6e3ab..886aaed 100644
--- a/include/linux/openvswitch.h
+++ b/include/linux/openvswitch.h
@@ -184,7 +184,6 @@ enum ovs_vport_type {
OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
OVS_VPORT_TYPE_GRE, /* GRE tunnel. */
OVS_VPORT_TYPE_VXLAN, /* VXLAN tunnel */
- OVS_VPORT_TYPE_CAPWAP = 102, /* CAPWAP tunnel */
OVS_VPORT_TYPE_GRE64 = 104, /* GRE tunnel with 64-bit keys */
__OVS_VPORT_TYPE_MAX
};
diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
index b6eba39..23c4ced 100644
--- a/lib/dpif-linux.c
+++ b/lib/dpif-linux.c
@@ -439,9 +439,6 @@ get_vport_type(const struct dpif_linux_vport *vport)
case OVS_VPORT_TYPE_GRE64:
return "gre64";
- case OVS_VPORT_TYPE_CAPWAP:
- return "capwap";
-
case OVS_VPORT_TYPE_VXLAN:
return "vxlan";
@@ -468,8 +465,6 @@ netdev_to_ovs_vport_type(const struct netdev *netdev)
return OVS_VPORT_TYPE_GRE64;
} else if (strstr(type, "gre")) {
return OVS_VPORT_TYPE_GRE;
- } else if (!strcmp(type, "capwap")) {
- return OVS_VPORT_TYPE_CAPWAP;
} else if (!strcmp(type, "vxlan")) {
return OVS_VPORT_TYPE_VXLAN;
} else {
diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index b892f8f..1196ec8 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -289,10 +289,6 @@ set_tunnel_config(struct netdev_dev *dev_, const struct smap *args)
ipsec_mech_set = false;
memset(&tnl_cfg, 0, sizeof tnl_cfg);
- if (!strcmp(type, "capwap")) {
- VLOG_WARN_ONCE("CAPWAP tunnel support is deprecated.");
- }
-
needs_dst_port = !strcmp(type, "vxlan");
tnl_cfg.ipsec = strstr(type, "ipsec");
tnl_cfg.dont_fragment = true;
@@ -661,7 +657,6 @@ netdev_vport_tunnel_register(void)
TUNNEL_CLASS("ipsec_gre", "gre_system"),
TUNNEL_CLASS("gre64", "gre64_system"),
TUNNEL_CLASS("ipsec_gre64", "gre64_system"),
- TUNNEL_CLASS("capwap", "capwap_system"),
TUNNEL_CLASS("vxlan", "vxlan_system")
};
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index cd9a59c..4911998 100644
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -1232,19 +1232,6 @@
Same as IPSEC_GRE except 64 bit key.
</dd>
- <dt><code>capwap</code></dt>
- <dd>
- An Ethernet tunnel over the UDP transport portion of CAPWAP (RFC
- 5415). This allows interoperability with certain switches that do
- not support GRE. Only the tunneling component of the protocol is
- implemented. UDP ports 58881 and 58882 are used as the source and
- destination ports respectively. CAPWAP is currently supported only
- with the Linux kernel datapath with kernel version 2.6.26 or later.
-
- CAPWAP support is deprecated and will be removed no earlier than
- February 2013.
- </dd>
-
<dt><code>vxlan</code></dt>
<dd>
<p>
@@ -1278,8 +1265,7 @@
<p>
These options apply to interfaces with <ref column="type"/> of
<code>gre</code>, <code>ipsec_gre</code>, <code>gre64</code>,
- <code>ipsec_gre64</code>, <code>capwap</code>, and
- <code>vxlan</code>.
+ <code>ipsec_gre64</code>, and <code>vxlan</code>.
</p>
<p>
@@ -1323,7 +1309,7 @@
</li>
<li>
A positive 24-bit (for VXLAN), 32-bit (for GRE) or 64-bit (for
- CAPWAP) number. The tunnel receives only packets with the
+ GRE64) number. The tunnel receives only packets with the
specified key.
</li>
<li>
@@ -1350,7 +1336,7 @@
</li>
<li>
A positive 24-bit (for VXLAN), 32-bit (for GRE) or 64-bit (for
- CAPWAP) number. Packets sent through the tunnel will have the
+ GRE64) number. Packets sent through the tunnel will have the
specified key.
</li>
<li>
@@ -1550,15 +1536,15 @@
<column name="status" key="source_ip">
The source IP address used for an IPv4 tunnel end-point, such as
- <code>gre</code> or <code>capwap</code>.
+ <code>gre</code>.
</column>
<column name="status" key="tunnel_egress_iface">
- Egress interface for tunnels. Currently only relevant for GRE and
- CAPWAP tunnels. On Linux systems, this column will show the name of
- the interface which is responsible for routing traffic destined for the
- configured <ref column="options" key="remote_ip"/>. This could be an
- internal interface such as a bridge port.
+ Egress interface for tunnels. Currently only relevant for GRE tunnels
+ On Linux systems, this column will show the name of the interface
+ which is responsible for routing traffic destined for the configured
+ <ref column="options" key="remote_ip"/>. This could be an internal
+ interface such as a bridge port.
</column>
<column name="status" key="tunnel_egress_iface_carrier"
--
1.7.1
More information about the dev
mailing list