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/*
* Copyright (c) 2016 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.
*/
/**
* @file
* @brief Definitions for punt infrastructure.
*/
#ifndef included_punt_h
#define included_punt_h
#include <linux/un.h>
#include <stdbool.h>
#include <vnet/ip/ip.h>
/* Punting reason flags bitfield
* (position, length, value, name, string)
*/
#define foreach_vnet_punt_reason_flag \
_ (0, 1, 0, IP4_PACKET, "ip4-packet") \
_ (0, 1, 1, IP6_PACKET, "ip6-packet")
typedef enum vnet_punt_reason_flag_t_
{
#define _(pos, len, value, name, str) \
VNET_PUNT_REASON_F_##name = ((value) << (pos)),
foreach_vnet_punt_reason_flag
#undef _
} __clib_packed vnet_punt_reason_flag_t;
enum vnet_punt_reason_flag_mask_t_
{
#define _(pos, len, value, name, str) \
VNET_PUNT_REASON_F_MASK_##name = (((1 << (len)) - 1) << (pos)),
foreach_vnet_punt_reason_flag
#undef _
};
/* predicates associated with vlib_punt_reason_flag_t*/
#define _(pos, len, value, name, str) \
static_always_inline int vnet_punt_reason_flag_is_##name ( \
vnet_punt_reason_flag_t f) \
{ \
return (f & VNET_PUNT_REASON_F_MASK_##name) == VNET_PUNT_REASON_F_##name; \
}
foreach_vnet_punt_reason_flag
#undef _
#define foreach_punt_type \
_(L4, "l4") \
_(EXCEPTION, "exception") \
_(IP_PROTO, "ip-proto")
typedef enum punt_type_t_ {
#define _(v, s) PUNT_TYPE_##v,
foreach_punt_type
#undef _
} punt_type_t;
typedef struct punt_l4_t_
{
ip_address_family_t af;
ip_protocol_t protocol;
u16 port;
} punt_l4_t;
typedef struct punt_ip_proto_t_
{
ip_address_family_t af;
ip_protocol_t protocol;
} punt_ip_proto_t;
typedef struct punt_exception_t_
{
vlib_punt_reason_t reason;
} punt_exception_t;
typedef struct punt_union_t_
{
punt_exception_t exception;
punt_l4_t l4;
punt_ip_proto_t ip_proto;
} punt_union_t;
typedef struct punt_reg_t_
{
punt_type_t type;
punt_union_t punt;
} punt_reg_t;
clib_error_t *vnet_punt_add_del (vlib_main_t * vm,
const punt_reg_t * pr, bool is_add);
clib_error_t *vnet_punt_socket_add (vlib_main_t * vm,
u32 header_version,
const punt_reg_t * pr,
char *client_pathname);
clib_error_t *vnet_punt_socket_del (vlib_main_t * vm, const punt_reg_t * pr);
char *vnet_punt_get_server_pathname (void);
enum punt_action_e
{
PUNT_L2 = 0,
PUNT_IP4_ROUTED,
PUNT_IP6_ROUTED,
};
/*
* Packet descriptor header. Version 1
* If this header changes, the version must also change to notify clients.
*/
#define PUNT_PACKETDESC_VERSION 1
typedef struct __attribute__ ((packed))
{
u32 sw_if_index; /* RX or TX interface */
enum punt_action_e action;
} punt_packetdesc_t;
/*
* Client registration
*/
typedef struct
{
punt_reg_t reg;
struct sockaddr_un caddr;
} punt_client_t;
typedef struct punt_client_db_t_
{
void *clients_by_l4_port;
u32 *clients_by_exception;
void *clients_by_ip_proto;
} punt_client_db_t;
typedef struct punt_thread_data_t_
{
struct iovec *iovecs;
} punt_thread_data_t;
typedef struct
{
int socket_fd;
char sun_path[sizeof (struct sockaddr_un)];
punt_client_db_t db;
punt_client_t *punt_client_pool;
u32 clib_file_index;
bool is_configured;
vlib_node_t *interface_output_node;
u32 *ready_fds;
u32 *rx_buffers;
punt_thread_data_t *thread_data;
vlib_punt_hdl_t hdl;
u16 msg_id_base;
} punt_main_t;
extern punt_main_t punt_main;
typedef walk_rc_t (*punt_client_walk_cb_t) (const punt_client_t * pc,
void *ctx);
extern void punt_client_walk (punt_type_t pt,
punt_client_walk_cb_t cb, void *ctx);
extern u8 *format_vnet_punt_reason_flags (u8 *s, va_list *args);
/*
* inlines for the data-plane
*/
static_always_inline u32
punt_client_l4_mk_key (ip_address_family_t af, u16 port)
{
return (af << BITS (port) | port);
}
static_always_inline punt_client_t *
punt_client_l4_get (ip_address_family_t af, u16 port)
{
punt_main_t *pm = &punt_main;
uword *p;
p = hash_get (pm->db.clients_by_l4_port, punt_client_l4_mk_key (af, port));
if (p)
return (pool_elt_at_index (pm->punt_client_pool, p[0]));
return (NULL);
}
static_always_inline u32
punt_client_ip_proto_mk_key (ip_address_family_t af, ip_protocol_t proto)
{
return (af << 16 | proto);
}
static_always_inline punt_client_t *
punt_client_ip_proto_get (ip_address_family_t af, ip_protocol_t proto)
{
punt_main_t *pm = &punt_main;
uword *p;
p =
hash_get (pm->db.clients_by_ip_proto,
punt_client_ip_proto_mk_key (af, proto));
if (p)
return (pool_elt_at_index (pm->punt_client_pool, p[0]));
return (NULL);
}
static_always_inline punt_client_t *
punt_client_exception_get (vlib_punt_reason_t reason)
{
punt_main_t *pm = &punt_main;
u32 pci;
if (reason >= vec_len (pm->db.clients_by_exception))
return (NULL);
pci = pm->db.clients_by_exception[reason];
if (~0 != pci)
return (pool_elt_at_index (pm->punt_client_pool, pci));
return (NULL);
}
extern vlib_node_registration_t udp4_punt_node;
extern vlib_node_registration_t udp6_punt_node;
extern vlib_node_registration_t udp4_punt_socket_node;
extern vlib_node_registration_t udp6_punt_socket_node;
extern vlib_node_registration_t ip4_proto_punt_socket_node;
extern vlib_node_registration_t ip6_proto_punt_socket_node;
extern vlib_node_registration_t punt_socket_rx_node;
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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