import socket
from scapy.layers.inet import IP, UDP, ICMP
from scapy.layers.inet6 import IPv6
from scapy.layers.l2 import Ether, GRE
from scapy.packet import Raw
from framework import VppTestCase
from util import ppp
""" TestPing is a subclass of VPPTestCase classes.
Basic test for sanity check of the ping.
"""
class TestPing(VppTestCase):
""" Ping Test Case """
@classmethod
def setUpClass(cls):
super(TestPing, cls).setUpClass()
try:
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls
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/*
* gre.h: types/functions for gre.
*
* Copyright (c) 2012 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_gre_h
#define included_gre_h
#include <vnet/vnet.h>
#include <vnet/gre/packet.h>
#include <vnet/ip/ip.h>
#include <vnet/pg/pg.h>
#include <vnet/ip/format.h>
#include <vnet/adj/adj_types.h>
#include <vnet/tunnel/tunnel.h>
#include <vnet/nhrp/nhrp.h>
extern vnet_hw_interface_class_t gre_hw_interface_class;
extern vnet_hw_interface_class_t mgre_hw_interface_class;
typedef enum
{
#define gre_error(n,s) GRE_ERROR_##n,
#include <vnet/gre/error.def>
#undef gre_error
GRE_N_ERROR,
} gre_error_t;
/**
* L3: GRE (i.e. this tunnel is in L3 mode)
* TEB: Transparent Ethernet Bridging - the tunnel is in L2 mode
* ERSPAN: type 2 - the tunnel is for port mirror SPAN output. Each tunnel is
* associated with a session ID and expected to be used for encap
* and output of mirrored packet from a L2 network only. There is
* no support for receiving ERSPAN packets from a GRE ERSPAN tunnel
*/
#define foreach_gre_tunnel_type \
_(L3, "L3") \
_(TEB, "TEB") \
_(ERSPAN, "ERSPAN") \
/**
* @brief The GRE tunnel type
*/
typedef enum gre_tunnel_type_t_
{
#define _(n, s) GRE_TUNNEL_TYPE_##n,
foreach_gre_tunnel_type
#undef _
} __clib_packed gre_tunnel_type_t;
extern u8 *format_gre_tunnel_type (u8 * s, va_list * args);
/**
* A GRE payload protocol registration
*/
typedef struct
{
/** Name (a c string). */
char *name;
/** GRE protocol type in host byte order. */
gre_protocol_t protocol;
/** GRE tunnel type */
gre_tunnel_type_t tunnel_type;
/** Node which handles this type. */
u32 node_index;
/** Next index for this type. */
u32 next_index;
} gre_protocol_info_t;
/**
* Elements of the GRE key that are common for v6 and v6 addresses
*/
typedef struct gre_tunnel_key_common_t_
{
union
{
struct
{
u32 fib_index;
u16 session_id;
gre_tunnel_type_t type;
tunnel_mode_t mode;
};
u64 as_u64;
};
} gre_tunnel_key_common_t;
STATIC_ASSERT_SIZEOF (gre_tunnel_key_common_t, sizeof (u64));
/**
* @brief Key for a IPv4 GRE Tunnel
*/
typedef struct gre_tunnel_key4_t_
{
/**
* Source and destination IP addresses
*/
union
{
struct
{
ip4_address_t gtk_src;
ip4_address_t gtk_dst;
};
u64 gtk_as_u64;
};
/** address independent attributes */
gre_tunnel_key_common_t gtk_common;
} __attribute__ ((packed)) gre_tunnel_key4_t;
STATIC_ASSERT_SIZEOF (gre_tunnel_key4_t, 2 * sizeof (u64));
/**
* @brief Key for a IPv6 GRE Tunnel
* We use a different type so that the V4 key hash is as small as possible
*/
typedef struct gre_tunnel_key6_t_
{
/**
* Source and destination IP addresses
*/
ip6_address_t gtk_src;
ip6_address_t gtk_dst;
/** address independent attributes */
gre_tunnel_key_common_t gtk_common;
} __attribute__ ((packed)) gre_tunnel_key6_t;
STATIC_ASSERT_SIZEOF (gre_tunnel_key6_t, 5 * sizeof (u64));
/**
* Union of the two possible key types
*/
typedef union gre_tunnel_key_t_
{
gre_tunnel_key4_t gtk_v4;
gre_tunnel_key6_t gtk_v6;
} gre_tunnel_key_t;
/**
* The session ID is only a 10 bit value
*/
#define GTK_SESSION_ID_MAX (0x3ff)
/**
* Used for GRE header seq number generation for ERSPAN encap
*/
typedef struct
{
u32 seq_num;
u32 ref_count;
} gre_sn_t;
/**
* Hash key for GRE header seq number generation for ERSPAN encap
*/
typedef struct
{
ip46_address_t src;
ip46_address_t dst;
u32 fib_index;
} gre_sn_key_t;
/**
* @brief A representation of a GRE tunnel
*/
typedef struct
{
/**
* Required for pool_get_aligned
*/
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/**
* The tunnel's source/local address
*/
ip46_address_t tunnel_src;
/**
* The tunnel's destination/remote address
*/
fib_prefix_t tunnel_dst;
/**
* The FIB in which the src.dst address are present
*/
u32 outer_fib_index;
u32 hw_if_index;
u32 sw_if_index;
gre_tunnel_type_t type;
tunnel_mode_t mode;
tunnel_encap_decap_flags_t flags;
/**
* an L2 tunnel always rquires an L2 midchain. cache here for DP.
*/
adj_index_t l2_adj_index;
/**
* ERSPAN type 2 session ID, least significant 10 bits of u16
*/
u16 session_id;
/**
* GRE header sequence number (SN) used for ERSPAN type 2 header, must be
* bumped automically to be thread safe. As multiple GRE tunnels are created
* for the same fib-idx/DIP/SIP with different ERSPAN session number, they all
* share the same SN which is kept per FIB/DIP/SIP, as specified by RFC2890.
*/
gre_sn_t *gre_sn;
u32 dev_instance; /* Real device instance in tunnel vector */
u32 user_instance; /* Instance name being shown to user */
} gre_tunnel_t;
typedef struct
{
u8 next_index;
u8 tunnel_type;
} next_info_t;
/**
* @brief GRE related global data
*/
typedef struct
{
/**
* pool of tunnel instances
*/
gre_tunnel_t *tunnels;
/**
* GRE payload protocol registrations
*/
gre_protocol_info_t *protocol_infos;
/**
* Hash tables mapping name/protocol to protocol info index.
*/
uword *protocol_info_by_name, *protocol_info_by_protocol;
/**
* Hash mapping to tunnels with ipv4 src/dst addr
*/
uword *tunnel_by_key4;
/**
* Hash mapping to tunnels with ipv6 src/dst addr
*/
uword *tunnel_by_key6;
/**
* Hash mapping tunnel src/dst addr and fib-idx to sequence number
*/
uword *seq_num_by_key;
/**
* Mapping from sw_if_index to tunnel index
*/
u32 *tunnel_index_by_sw_if_index;
/* Sparse vector mapping gre protocol in network byte order
to next index. */
next_info_t *next_by_protocol;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
/* Record used instances */
uword *instance_used;
} gre_main_t;
/**
* @brief IPv4 and GRE header.
*/
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip4_header_t ip4;
gre_header_t gre;
}) ip4_and_gre_header_t;
/* *INDENT-ON* */
/**
* @brief IPv6 and GRE header.
*/
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip6_header_t ip6;
gre_header_t gre;
}) ip6_and_gre_header_t;
/* *INDENT-ON* */
always_inline gre_protocol_info_t *
gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
{
uword *p = hash_get (em->protocol_info_by_protocol, protocol);
return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
}
extern gre_main_t gre_main;
extern clib_error_t *gre_interface_admin_up_down (vnet_main_t * vnm,
u32 hw_if_index, u32 flags);
extern void gre_tunnel_stack (adj_index_t ai);
extern void gre_update_adj (vnet_main_t * vnm,
u32 sw_if_index, adj_index_t ai);
typedef struct mgre_walk_ctx_t_
{
const gre_tunnel_t *t;
const nhrp_entry_t *ne;
} mgre_walk_ctx_t;
adj_walk_rc_t mgre_mk_complete_walk (adj_index_t ai, void *data);
adj_walk_rc_t mgre_mk_incomplete_walk (adj_index_t ai, void *data);
format_function_t format_gre_protocol;
format_function_t format_gre_header;
format_function_t format_gre_header_with_length;
extern vlib_node_registration_t gre4_input_node;
extern vlib_node_registration_t gre6_input_node;
extern vlib_node_registration_t gre_encap_node;
extern vnet_device_class_t gre_device_class;
/* Parse gre protocol as 0xXXXX or protocol name.
In either host or network byte order. */
unformat_function_t unformat_gre_protocol_host_byte_order;
unformat_function_t unformat_gre_protocol_net_byte_order;
/* Parse gre header. */
unformat_function_t unformat_gre_header;
unformat_function_t unformat_pg_gre_header;
void
gre_register_input_protocol (vlib_main_t * vm, gre_protocol_t protocol,
u32 node_index, gre_tunnel_type_t tunnel_type);
/* manually added to the interface output node in gre.c */
#define GRE_OUTPUT_NEXT_LOOKUP 1
typedef struct
{
u8 is_add;
gre_tunnel_type_t type;
tunnel_mode_t mode;
u8 is_ipv6;
u32 instance;
ip46_address_t src, dst;
u32 outer_table_id;
u16 session_id;
tunnel_encap_decap_flags_t flags;
} vnet_gre_tunnel_add_del_args_t;
extern int vnet_gre_tunnel_add_del (vnet_gre_tunnel_add_del_args_t * a,
u32 * sw_if_indexp);
static inline void
gre_mk_key4 (ip4_address_t src,
ip4_address_t dst,
u32 fib_index,
gre_tunnel_type_t ttype,
tunnel_mode_t tmode, u16 session_id, gre_tunnel_key4_t * key)
{
key->gtk_src = src;
key->gtk_dst = dst;
key->gtk_common.type = ttype;
key->gtk_common.mode = tmode;
key->gtk_common.fib_index = fib_index;
key->gtk_common.session_id = session_id;
}
static inline int
gre_match_key4 (const gre_tunnel_key4_t * key1,
const gre_tunnel_key4_t * key2)
{
return ((key1->gtk_as_u64 == key2->gtk_as_u64) &&
(key1->gtk_common.as_u64 == key2->gtk_common.as_u64));
}
static inline void
gre_mk_key6 (const ip6_address_t * src,
const ip6_address_t * dst,
u32 fib_index,
gre_tunnel_type_t ttype,
tunnel_mode_t tmode, u16 session_id, gre_tunnel_key6_t * key)
{
key->gtk_src = *src;
key->gtk_dst = *dst;
key->gtk_common.type = ttype;
key->gtk_common.mode = tmode;
key->gtk_common.fib_index = fib_index;
key->gtk_common.session_id = session_id;
}
static inline int
gre_match_key6 (const gre_tunnel_key6_t * key1,
const gre_tunnel_key6_t * key2)
{
return (ip6_address_is_equal (&key1->gtk_src, &key2->gtk_src) &&
ip6_address_is_equal (&key1->gtk_dst, &key2->gtk_dst) &&
(key1->gtk_common.as_u64 == key2->gtk_common.as_u64));
}
static inline void
gre_mk_sn_key (const gre_tunnel_t * gt, gre_sn_key_t * key)
{
key->src = gt->tunnel_src;
key->dst = gt->tunnel_dst.fp_addr;
key->fib_index = gt->outer_fib_index;
}
#endif /* included_gre_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/