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ofproto-dpif-ipfix.c
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ofproto-dpif-ipfix.c
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/*
* Copyright (c) 2012, 2013, 2014 Nicira, Inc.
*
* 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.
*/
#include <config.h>
#include "ofproto-dpif-ipfix.h"
#include <sys/time.h>
#include "byte-order.h"
#include "collectors.h"
#include "flow.h"
#include "hash.h"
#include "hmap.h"
#include "list.h"
#include "ofpbuf.h"
#include "ofproto.h"
#include "ofproto-dpif.h"
#include "dp-packet.h"
#include "packets.h"
#include "poll-loop.h"
#include "sset.h"
#include "util.h"
#include "timeval.h"
#include "util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ipfix);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
/* Cf. IETF RFC 5101 Section 10.3.4. */
#define IPFIX_DEFAULT_COLLECTOR_PORT 4739
/* The standard layer2SegmentId (ID 351) element is included in vDS to send
* the VxLAN tunnel's VNI. It is 64-bit long, the most significant byte is
* used to indicate the type of tunnel (0x01 = VxLAN, 0x02 = GRE) and the three
* least significant bytes hold the value of the layer 2 overlay network
* segment identifier: a 24-bit VxLAN tunnel's VNI or a 24-bit GRE tunnel's
* TNI. This is not compatible with GRE-64 or STT, as implemented in OVS, as
* their tunnel IDs are 64-bit.
*
* Two new enterprise information elements are defined which are similar to
* laryerSegmentId but support 64-bit IDs:
* tunnelType (ID 891) and tunnelKey (ID 892).
*
* The enum dpif_ipfix_tunnel_type is to declare the types supported in the
* tunnelType element.
* The number of ipfix tunnel types includes two reserverd types: 0x04 and 0x06.
*/
enum dpif_ipfix_tunnel_type {
DPIF_IPFIX_TUNNEL_UNKNOWN = 0x00,
DPIF_IPFIX_TUNNEL_VXLAN = 0x01,
DPIF_IPFIX_TUNNEL_GRE = 0x02,
DPIF_IPFIX_TUNNEL_LISP = 0x03,
DPIF_IPFIX_TUNNEL_STT = 0x04,
DPIF_IPFIX_TUNNEL_IPSEC_GRE = 0x05,
DPIF_IPFIX_TUNNEL_GENEVE = 0x07,
NUM_DPIF_IPFIX_TUNNEL
};
struct dpif_ipfix_port {
struct hmap_node hmap_node; /* In struct dpif_ipfix's "tunnel_ports" hmap. */
struct ofport *ofport; /* To retrieve port stats. */
odp_port_t odp_port;
enum dpif_ipfix_tunnel_type tunnel_type;
uint8_t tunnel_key_length;
};
struct dpif_ipfix_exporter {
struct collectors *collectors;
uint32_t seq_number;
time_t last_template_set_time;
struct hmap cache_flow_key_map; /* ipfix_flow_cache_entry. */
struct ovs_list cache_flow_start_timestamp_list; /* ipfix_flow_cache_entry. */
uint32_t cache_active_timeout; /* In seconds. */
uint32_t cache_max_flows;
};
struct dpif_ipfix_bridge_exporter {
struct dpif_ipfix_exporter exporter;
struct ofproto_ipfix_bridge_exporter_options *options;
uint32_t probability;
};
struct dpif_ipfix_flow_exporter {
struct dpif_ipfix_exporter exporter;
struct ofproto_ipfix_flow_exporter_options *options;
};
struct dpif_ipfix_flow_exporter_map_node {
struct hmap_node node;
struct dpif_ipfix_flow_exporter exporter;
};
struct dpif_ipfix {
struct dpif_ipfix_bridge_exporter bridge_exporter;
struct hmap flow_exporter_map; /* dpif_ipfix_flow_exporter_map_node. */
struct hmap tunnel_ports; /* Contains "struct dpif_ipfix_port"s.
* It makes tunnel port lookups faster in
* sampling upcalls. */
struct ovs_refcount ref_cnt;
};
#define IPFIX_VERSION 0x000a
/* When using UDP, IPFIX Template Records must be re-sent regularly.
* The standard default interval is 10 minutes (600 seconds).
* Cf. IETF RFC 5101 Section 10.3.6. */
#define IPFIX_TEMPLATE_INTERVAL 600
/* Cf. IETF RFC 5101 Section 3.1. */
OVS_PACKED(
struct ipfix_header {
ovs_be16 version; /* IPFIX_VERSION. */
ovs_be16 length; /* Length in bytes including this header. */
ovs_be32 export_time; /* Seconds since the epoch. */
ovs_be32 seq_number; /* Message sequence number. */
ovs_be32 obs_domain_id; /* Observation Domain ID. */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_header) == 16);
#define IPFIX_SET_ID_TEMPLATE 2
#define IPFIX_SET_ID_OPTION_TEMPLATE 3
/* Cf. IETF RFC 5101 Section 3.3.2. */
OVS_PACKED(
struct ipfix_set_header {
ovs_be16 set_id; /* IPFIX_SET_ID_* or valid template ID for Data Sets. */
ovs_be16 length; /* Length of the set in bytes including header. */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_set_header) == 4);
/* Alternatives for templates at each layer. A template is defined by
* a combination of one value for each layer. */
enum ipfix_proto_l2 {
IPFIX_PROTO_L2_ETH = 0, /* No VLAN. */
IPFIX_PROTO_L2_VLAN,
NUM_IPFIX_PROTO_L2
};
enum ipfix_proto_l3 {
IPFIX_PROTO_L3_UNKNOWN = 0,
IPFIX_PROTO_L3_IPV4,
IPFIX_PROTO_L3_IPV6,
NUM_IPFIX_PROTO_L3
};
enum ipfix_proto_l4 {
IPFIX_PROTO_L4_UNKNOWN = 0,
IPFIX_PROTO_L4_TCP_UDP_SCTP,
IPFIX_PROTO_L4_ICMP,
NUM_IPFIX_PROTO_L4
};
enum ipfix_proto_tunnel {
IPFIX_PROTO_NOT_TUNNELED = 0,
IPFIX_PROTO_TUNNELED, /* Support gre, lisp and vxlan. */
NUM_IPFIX_PROTO_TUNNEL
};
/* Any Template ID > 255 is usable for Template Records. */
#define IPFIX_TEMPLATE_ID_MIN 256
/* Cf. IETF RFC 5101 Section 3.4.1. */
OVS_PACKED(
struct ipfix_template_record_header {
ovs_be16 template_id;
ovs_be16 field_count;
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_template_record_header) == 4);
enum ipfix_entity_id {
/* standard IPFIX elements */
#define IPFIX_ENTITY(ENUM, ID, SIZE, NAME) IPFIX_ENTITY_ID_##ENUM = ID,
#include "ofproto/ipfix-entities.def"
/* non-standard IPFIX elements */
#define IPFIX_SET_ENTERPRISE(v) (((v) | 0x8000))
#define IPFIX_ENTERPRISE_ENTITY(ENUM, ID, SIZE, NAME, ENTERPRISE) \
IPFIX_ENTITY_ID_##ENUM = IPFIX_SET_ENTERPRISE(ID),
#include "ofproto/ipfix-enterprise-entities.def"
};
enum ipfix_entity_size {
/* standard IPFIX elements */
#define IPFIX_ENTITY(ENUM, ID, SIZE, NAME) IPFIX_ENTITY_SIZE_##ENUM = SIZE,
#include "ofproto/ipfix-entities.def"
/* non-standard IPFIX elements */
#define IPFIX_ENTERPRISE_ENTITY(ENUM, ID, SIZE, NAME, ENTERPRISE) \
IPFIX_ENTITY_SIZE_##ENUM = SIZE,
#include "ofproto/ipfix-enterprise-entities.def"
};
enum ipfix_entity_enterprise {
/* standard IPFIX elements */
#define IPFIX_ENTITY(ENUM, ID, SIZE, NAME) IPFIX_ENTITY_ENTERPRISE_##ENUM = 0,
#include "ofproto/ipfix-entities.def"
/* non-standard IPFIX elements */
#define IPFIX_ENTERPRISE_ENTITY(ENUM, ID, SIZE, NAME, ENTERPRISE) \
IPFIX_ENTITY_ENTERPRISE_##ENUM = ENTERPRISE,
#include "ofproto/ipfix-enterprise-entities.def"
};
OVS_PACKED(
struct ipfix_template_field_specifier {
ovs_be16 element_id; /* IPFIX_ENTITY_ID_*. */
ovs_be16 field_length; /* Length of the field's value, in bytes.
* For Variable-Length element, it should be 65535.
*/
ovs_be32 enterprise; /* Enterprise number */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_template_field_specifier) == 8);
/* Cf. IETF RFC 5102 Section 5.11.6. */
enum ipfix_flow_direction {
INGRESS_FLOW = 0x00,
EGRESS_FLOW = 0x01
};
/* Part of data record flow key for common metadata and Ethernet entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_common {
ovs_be32 observation_point_id; /* OBSERVATION_POINT_ID */
uint8_t flow_direction; /* FLOW_DIRECTION */
uint8_t source_mac_address[ETH_ADDR_LEN]; /* SOURCE_MAC_ADDRESS */
uint8_t destination_mac_address[ETH_ADDR_LEN]; /* DESTINATION_MAC_ADDRESS */
ovs_be16 ethernet_type; /* ETHERNET_TYPE */
uint8_t ethernet_header_length; /* ETHERNET_HEADER_LENGTH */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_common) == 20);
/* Part of data record flow key for VLAN entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_vlan {
ovs_be16 vlan_id; /* VLAN_ID */
ovs_be16 dot1q_vlan_id; /* DOT1Q_VLAN_ID */
uint8_t dot1q_priority; /* DOT1Q_PRIORITY */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_vlan) == 5);
/* Part of data record flow key for IP entities. */
/* XXX: Replace IP_TTL with MINIMUM_TTL and MAXIMUM_TTL? */
OVS_PACKED(
struct ipfix_data_record_flow_key_ip {
uint8_t ip_version; /* IP_VERSION */
uint8_t ip_ttl; /* IP_TTL */
uint8_t protocol_identifier; /* PROTOCOL_IDENTIFIER */
uint8_t ip_diff_serv_code_point; /* IP_DIFF_SERV_CODE_POINT */
uint8_t ip_precedence; /* IP_PRECEDENCE */
uint8_t ip_class_of_service; /* IP_CLASS_OF_SERVICE */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_ip) == 6);
/* Part of data record flow key for IPv4 entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_ipv4 {
ovs_be32 source_ipv4_address; /* SOURCE_IPV4_ADDRESS */
ovs_be32 destination_ipv4_address; /* DESTINATION_IPV4_ADDRESS */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_ipv4) == 8);
/* Part of data record flow key for IPv6 entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_ipv6 {
uint8_t source_ipv6_address[16]; /* SOURCE_IPV6_ADDRESS */
uint8_t destination_ipv6_address[16]; /* DESTINATION_IPV6_ADDRESS */
ovs_be32 flow_label_ipv6; /* FLOW_LABEL_IPV6 */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_ipv6) == 36);
/* Part of data record flow key for TCP/UDP/SCTP entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_transport {
ovs_be16 source_transport_port; /* SOURCE_TRANSPORT_PORT */
ovs_be16 destination_transport_port; /* DESTINATION_TRANSPORT_PORT */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_transport) == 4);
/* Part of data record flow key for ICMP entities. */
OVS_PACKED(
struct ipfix_data_record_flow_key_icmp {
uint8_t icmp_type; /* ICMP_TYPE_IPV4 / ICMP_TYPE_IPV6 */
uint8_t icmp_code; /* ICMP_CODE_IPV4 / ICMP_CODE_IPV6 */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_icmp) == 2);
/* For the tunnel type that is on the top of IPSec, the protocol identifier
* of the upper tunnel type is used.
*/
static uint8_t tunnel_protocol[NUM_DPIF_IPFIX_TUNNEL] = {
0, /* reserved */
IPPROTO_UDP, /* DPIF_IPFIX_TUNNEL_VXLAN */
IPPROTO_GRE, /* DPIF_IPFIX_TUNNEL_GRE */
IPPROTO_UDP, /* DPIF_IPFIX_TUNNEL_LISP*/
IPPROTO_TCP, /* DPIF_IPFIX_TUNNEL_STT*/
IPPROTO_GRE, /* DPIF_IPFIX_TUNNEL_IPSEC_GRE */
0 , /* reserved */
IPPROTO_UDP, /* DPIF_IPFIX_TUNNEL_GENEVE*/
};
OVS_PACKED(
struct ipfix_data_record_flow_key_tunnel {
ovs_be32 tunnel_source_ipv4_address; /* TUNNEL_SOURCE_IPV4_ADDRESS */
ovs_be32 tunnel_destination_ipv4_address; /* TUNNEL_DESTINATION_IPV4_ADDRESS */
uint8_t tunnel_protocol_identifier; /* TUNNEL_PROTOCOL_IDENTIFIER */
ovs_be16 tunnel_source_transport_port; /* TUNNEL_SOURCE_TRANSPORT_PORT */
ovs_be16 tunnel_destination_transport_port; /* TUNNEL_DESTINATION_TRANSPORT_PORT */
uint8_t tunnel_type; /* TUNNEL_TYPE */
uint8_t tunnel_key_length; /* length of TUNNEL_KEY */
uint8_t tunnel_key[]; /* data of TUNNEL_KEY */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_flow_key_tunnel) == 15);
/* Cf. IETF RFC 5102 Section 5.11.3. */
enum ipfix_flow_end_reason {
IDLE_TIMEOUT = 0x01,
ACTIVE_TIMEOUT = 0x02,
END_OF_FLOW_DETECTED = 0x03,
FORCED_END = 0x04,
LACK_OF_RESOURCES = 0x05
};
/* Part of data record for common aggregated elements. */
OVS_PACKED(
struct ipfix_data_record_aggregated_common {
ovs_be32 flow_start_delta_microseconds; /* FLOW_START_DELTA_MICROSECONDS */
ovs_be32 flow_end_delta_microseconds; /* FLOW_END_DELTA_MICROSECONDS */
ovs_be64 packet_delta_count; /* PACKET_DELTA_COUNT */
ovs_be64 layer2_octet_delta_count; /* LAYER2_OCTET_DELTA_COUNT */
uint8_t flow_end_reason; /* FLOW_END_REASON */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_aggregated_common) == 25);
/* Part of data record for IP aggregated elements. */
OVS_PACKED(
struct ipfix_data_record_aggregated_ip {
ovs_be64 octet_delta_count; /* OCTET_DELTA_COUNT */
ovs_be64 octet_delta_sum_of_squares; /* OCTET_DELTA_SUM_OF_SQUARES */
ovs_be64 minimum_ip_total_length; /* MINIMUM_IP_TOTAL_LENGTH */
ovs_be64 maximum_ip_total_length; /* MAXIMUM_IP_TOTAL_LENGTH */
});
BUILD_ASSERT_DECL(sizeof(struct ipfix_data_record_aggregated_ip) == 32);
/*
* support tunnel key for:
* VxLAN: 24-bit VIN,
* GRE: 32- or 64-bit key,
* LISP: 24-bit instance ID
* STT: 64-bit key
*/
#define MAX_TUNNEL_KEY_LEN 8
#define MAX_FLOW_KEY_LEN \
(sizeof(struct ipfix_data_record_flow_key_common) \
+ sizeof(struct ipfix_data_record_flow_key_vlan) \
+ sizeof(struct ipfix_data_record_flow_key_ip) \
+ MAX(sizeof(struct ipfix_data_record_flow_key_ipv4), \
sizeof(struct ipfix_data_record_flow_key_ipv6)) \
+ MAX(sizeof(struct ipfix_data_record_flow_key_icmp), \
sizeof(struct ipfix_data_record_flow_key_transport)) \
+ sizeof(struct ipfix_data_record_flow_key_tunnel) \
+ MAX_TUNNEL_KEY_LEN)
#define MAX_DATA_RECORD_LEN \
(MAX_FLOW_KEY_LEN \
+ sizeof(struct ipfix_data_record_aggregated_common) \
+ sizeof(struct ipfix_data_record_aggregated_ip))
/* Max length of a data set. To simplify the implementation, each
* data record is sent in a separate data set, so each data set
* contains at most one data record. */
#define MAX_DATA_SET_LEN \
(sizeof(struct ipfix_set_header) \
+ MAX_DATA_RECORD_LEN)
/* Max length of an IPFIX message. Arbitrarily set to accommodate low
* MTU. */
#define MAX_MESSAGE_LEN 1024
/* Cache structures. */
/* Flow key. */
struct ipfix_flow_key {
uint32_t obs_domain_id;
uint16_t template_id;
size_t flow_key_msg_part_size;
uint64_t flow_key_msg_part[DIV_ROUND_UP(MAX_FLOW_KEY_LEN, 8)];
};
/* Flow cache entry. */
struct ipfix_flow_cache_entry {
struct hmap_node flow_key_map_node;
struct ovs_list cache_flow_start_timestamp_list_node;
struct ipfix_flow_key flow_key;
/* Common aggregated elements. */
uint64_t flow_start_timestamp_usec;
uint64_t flow_end_timestamp_usec;
uint64_t packet_delta_count;
uint64_t layer2_octet_delta_count;
uint64_t octet_delta_count;
uint64_t octet_delta_sum_of_squares; /* 0 if not IP. */
uint16_t minimum_ip_total_length; /* 0 if not IP. */
uint16_t maximum_ip_total_length; /* 0 if not IP. */
};
static void dpif_ipfix_cache_expire(struct dpif_ipfix_exporter *, bool,
const uint64_t, const uint32_t);
static void get_export_time_now(uint64_t *, uint32_t *);
static void dpif_ipfix_cache_expire_now(struct dpif_ipfix_exporter *, bool);
static bool
ofproto_ipfix_bridge_exporter_options_equal(
const struct ofproto_ipfix_bridge_exporter_options *a,
const struct ofproto_ipfix_bridge_exporter_options *b)
{
return (a->obs_domain_id == b->obs_domain_id
&& a->obs_point_id == b->obs_point_id
&& a->sampling_rate == b->sampling_rate
&& a->cache_active_timeout == b->cache_active_timeout
&& a->cache_max_flows == b->cache_max_flows
&& a->enable_tunnel_sampling == b->enable_tunnel_sampling
&& a->enable_input_sampling == b->enable_input_sampling
&& a->enable_output_sampling == b->enable_output_sampling
&& sset_equals(&a->targets, &b->targets));
}
static struct ofproto_ipfix_bridge_exporter_options *
ofproto_ipfix_bridge_exporter_options_clone(
const struct ofproto_ipfix_bridge_exporter_options *old)
{
struct ofproto_ipfix_bridge_exporter_options *new =
xmemdup(old, sizeof *old);
sset_clone(&new->targets, &old->targets);
return new;
}
static void
ofproto_ipfix_bridge_exporter_options_destroy(
struct ofproto_ipfix_bridge_exporter_options *options)
{
if (options) {
sset_destroy(&options->targets);
free(options);
}
}
static bool
ofproto_ipfix_flow_exporter_options_equal(
const struct ofproto_ipfix_flow_exporter_options *a,
const struct ofproto_ipfix_flow_exporter_options *b)
{
return (a->collector_set_id == b->collector_set_id
&& a->cache_active_timeout == b->cache_active_timeout
&& a->cache_max_flows == b->cache_max_flows
&& sset_equals(&a->targets, &b->targets));
}
static struct ofproto_ipfix_flow_exporter_options *
ofproto_ipfix_flow_exporter_options_clone(
const struct ofproto_ipfix_flow_exporter_options *old)
{
struct ofproto_ipfix_flow_exporter_options *new =
xmemdup(old, sizeof *old);
sset_clone(&new->targets, &old->targets);
return new;
}
static void
ofproto_ipfix_flow_exporter_options_destroy(
struct ofproto_ipfix_flow_exporter_options *options)
{
if (options) {
sset_destroy(&options->targets);
free(options);
}
}
static void
dpif_ipfix_exporter_init(struct dpif_ipfix_exporter *exporter)
{
exporter->collectors = NULL;
exporter->seq_number = 1;
exporter->last_template_set_time = 0;
hmap_init(&exporter->cache_flow_key_map);
list_init(&exporter->cache_flow_start_timestamp_list);
exporter->cache_active_timeout = 0;
exporter->cache_max_flows = 0;
}
static void
dpif_ipfix_exporter_clear(struct dpif_ipfix_exporter *exporter)
{
/* Flush the cache with flow end reason "forced end." */
dpif_ipfix_cache_expire_now(exporter, true);
collectors_destroy(exporter->collectors);
exporter->collectors = NULL;
exporter->seq_number = 1;
exporter->last_template_set_time = 0;
exporter->cache_active_timeout = 0;
exporter->cache_max_flows = 0;
}
static void
dpif_ipfix_exporter_destroy(struct dpif_ipfix_exporter *exporter)
{
dpif_ipfix_exporter_clear(exporter);
hmap_destroy(&exporter->cache_flow_key_map);
}
static bool
dpif_ipfix_exporter_set_options(struct dpif_ipfix_exporter *exporter,
const struct sset *targets,
const uint32_t cache_active_timeout,
const uint32_t cache_max_flows)
{
collectors_destroy(exporter->collectors);
collectors_create(targets, IPFIX_DEFAULT_COLLECTOR_PORT,
&exporter->collectors);
if (exporter->collectors == NULL) {
VLOG_WARN_RL(&rl, "no collectors could be initialized, "
"IPFIX exporter disabled");
dpif_ipfix_exporter_clear(exporter);
return false;
}
exporter->cache_active_timeout = cache_active_timeout;
exporter->cache_max_flows = cache_max_flows;
return true;
}
static struct dpif_ipfix_port *
dpif_ipfix_find_port(const struct dpif_ipfix *di,
odp_port_t odp_port) OVS_REQUIRES(mutex)
{
struct dpif_ipfix_port *dip;
HMAP_FOR_EACH_IN_BUCKET (dip, hmap_node, hash_odp_port(odp_port),
&di->tunnel_ports) {
if (dip->odp_port == odp_port) {
return dip;
}
}
return NULL;
}
static void
dpif_ipfix_del_port(struct dpif_ipfix *di,
struct dpif_ipfix_port *dip)
OVS_REQUIRES(mutex)
{
hmap_remove(&di->tunnel_ports, &dip->hmap_node);
free(dip);
}
void
dpif_ipfix_add_tunnel_port(struct dpif_ipfix *di, struct ofport *ofport,
odp_port_t odp_port) OVS_EXCLUDED(mutex)
{
struct dpif_ipfix_port *dip;
const char *type;
ovs_mutex_lock(&mutex);
dip = dpif_ipfix_find_port(di, odp_port);
if (dip) {
dpif_ipfix_del_port(di, dip);
}
type = netdev_get_type(ofport->netdev);
if (type == NULL) {
goto out;
}
/* Add to table of tunnel ports. */
dip = xmalloc(sizeof *dip);
dip->ofport = ofport;
dip->odp_port = odp_port;
if (strcmp(type, "gre") == 0) {
/* 32-bit key gre */
dip->tunnel_type = DPIF_IPFIX_TUNNEL_GRE;
dip->tunnel_key_length = 4;
} else if (strcmp(type, "gre64") == 0) {
/* 64-bit key gre */
dip->tunnel_type = DPIF_IPFIX_TUNNEL_GRE;
dip->tunnel_key_length = 8;
} else if (strcmp(type, "ipsec_gre") == 0) {
/* 32-bit key ipsec_gre */
dip->tunnel_type = DPIF_IPFIX_TUNNEL_IPSEC_GRE;
dip->tunnel_key_length = 4;
} else if (strcmp(type, "ipsec_gre64") == 0) {
/* 64-bit key ipsec_gre */
dip->tunnel_type = DPIF_IPFIX_TUNNEL_IPSEC_GRE;
dip->tunnel_key_length = 8;
} else if (strcmp(type, "vxlan") == 0) {
dip->tunnel_type = DPIF_IPFIX_TUNNEL_VXLAN;
dip->tunnel_key_length = 3;
} else if (strcmp(type, "lisp") == 0) {
dip->tunnel_type = DPIF_IPFIX_TUNNEL_LISP;
dip->tunnel_key_length = 3;
} else if (strcmp(type, "geneve") == 0) {
dip->tunnel_type = DPIF_IPFIX_TUNNEL_GENEVE;
dip->tunnel_key_length = 3;
} else if (strcmp(type, "stt") == 0) {
dip->tunnel_type = DPIF_IPFIX_TUNNEL_STT;
dip->tunnel_key_length = 8;
} else {
free(dip);
goto out;
}
hmap_insert(&di->tunnel_ports, &dip->hmap_node, hash_odp_port(odp_port));
out:
ovs_mutex_unlock(&mutex);
}
void
dpif_ipfix_del_tunnel_port(struct dpif_ipfix *di, odp_port_t odp_port)
OVS_EXCLUDED(mutex)
{
struct dpif_ipfix_port *dip;
ovs_mutex_lock(&mutex);
dip = dpif_ipfix_find_port(di, odp_port);
if (dip) {
dpif_ipfix_del_port(di, dip);
}
ovs_mutex_unlock(&mutex);
}
bool
dpif_ipfix_get_tunnel_port(const struct dpif_ipfix *di, odp_port_t odp_port)
OVS_EXCLUDED(mutex)
{
struct dpif_ipfix_port *dip;
ovs_mutex_lock(&mutex);
dip = dpif_ipfix_find_port(di, odp_port);
ovs_mutex_unlock(&mutex);
return dip != NULL;
}
static void
dpif_ipfix_bridge_exporter_init(struct dpif_ipfix_bridge_exporter *exporter)
{
dpif_ipfix_exporter_init(&exporter->exporter);
exporter->options = NULL;
exporter->probability = 0;
}
static void
dpif_ipfix_bridge_exporter_clear(struct dpif_ipfix_bridge_exporter *exporter)
{
dpif_ipfix_exporter_clear(&exporter->exporter);
ofproto_ipfix_bridge_exporter_options_destroy(exporter->options);
exporter->options = NULL;
exporter->probability = 0;
}
static void
dpif_ipfix_bridge_exporter_destroy(struct dpif_ipfix_bridge_exporter *exporter)
{
dpif_ipfix_bridge_exporter_clear(exporter);
dpif_ipfix_exporter_destroy(&exporter->exporter);
}
static void
dpif_ipfix_bridge_exporter_set_options(
struct dpif_ipfix_bridge_exporter *exporter,
const struct ofproto_ipfix_bridge_exporter_options *options)
{
bool options_changed;
if (!options || sset_is_empty(&options->targets)) {
/* No point in doing any work if there are no targets. */
dpif_ipfix_bridge_exporter_clear(exporter);
return;
}
options_changed = (
!exporter->options
|| !ofproto_ipfix_bridge_exporter_options_equal(
options, exporter->options));
/* Configure collectors if options have changed or if we're
* shortchanged in collectors (which indicates that opening one or
* more of the configured collectors failed, so that we should
* retry). */
if (options_changed
|| collectors_count(exporter->exporter.collectors)
< sset_count(&options->targets)) {
if (!dpif_ipfix_exporter_set_options(
&exporter->exporter, &options->targets,
options->cache_active_timeout, options->cache_max_flows)) {
return;
}
}
/* Avoid reconfiguring if options didn't change. */
if (!options_changed) {
return;
}
ofproto_ipfix_bridge_exporter_options_destroy(exporter->options);
exporter->options = ofproto_ipfix_bridge_exporter_options_clone(options);
exporter->probability =
MAX(1, UINT32_MAX / exporter->options->sampling_rate);
/* Run over the cache as some entries might have expired after
* changing the timeouts. */
dpif_ipfix_cache_expire_now(&exporter->exporter, false);
}
static struct dpif_ipfix_flow_exporter_map_node*
dpif_ipfix_find_flow_exporter_map_node(
const struct dpif_ipfix *di, const uint32_t collector_set_id)
OVS_REQUIRES(mutex)
{
struct dpif_ipfix_flow_exporter_map_node *exporter_node;
HMAP_FOR_EACH_WITH_HASH (exporter_node, node,
hash_int(collector_set_id, 0),
&di->flow_exporter_map) {
if (exporter_node->exporter.options->collector_set_id
== collector_set_id) {
return exporter_node;
}
}
return NULL;
}
static void
dpif_ipfix_flow_exporter_init(struct dpif_ipfix_flow_exporter *exporter)
{
dpif_ipfix_exporter_init(&exporter->exporter);
exporter->options = NULL;
}
static void
dpif_ipfix_flow_exporter_clear(struct dpif_ipfix_flow_exporter *exporter)
{
dpif_ipfix_exporter_clear(&exporter->exporter);
ofproto_ipfix_flow_exporter_options_destroy(exporter->options);
exporter->options = NULL;
}
static void
dpif_ipfix_flow_exporter_destroy(struct dpif_ipfix_flow_exporter *exporter)
{
dpif_ipfix_flow_exporter_clear(exporter);
dpif_ipfix_exporter_destroy(&exporter->exporter);
}
static bool
dpif_ipfix_flow_exporter_set_options(
struct dpif_ipfix_flow_exporter *exporter,
const struct ofproto_ipfix_flow_exporter_options *options)
{
bool options_changed;
if (sset_is_empty(&options->targets)) {
/* No point in doing any work if there are no targets. */
dpif_ipfix_flow_exporter_clear(exporter);
return true;
}
options_changed = (
!exporter->options
|| !ofproto_ipfix_flow_exporter_options_equal(
options, exporter->options));
/* Configure collectors if options have changed or if we're
* shortchanged in collectors (which indicates that opening one or
* more of the configured collectors failed, so that we should
* retry). */
if (options_changed
|| collectors_count(exporter->exporter.collectors)
< sset_count(&options->targets)) {
if (!dpif_ipfix_exporter_set_options(
&exporter->exporter, &options->targets,
options->cache_active_timeout, options->cache_max_flows)) {
return false;
}
}
/* Avoid reconfiguring if options didn't change. */
if (!options_changed) {
return true;
}
ofproto_ipfix_flow_exporter_options_destroy(exporter->options);
exporter->options = ofproto_ipfix_flow_exporter_options_clone(options);
/* Run over the cache as some entries might have expired after
* changing the timeouts. */
dpif_ipfix_cache_expire_now(&exporter->exporter, false);
return true;
}
static void
remove_flow_exporter(struct dpif_ipfix *di,
struct dpif_ipfix_flow_exporter_map_node *node)
{
hmap_remove(&di->flow_exporter_map, &node->node);
dpif_ipfix_flow_exporter_destroy(&node->exporter);
free(node);
}
void
dpif_ipfix_set_options(
struct dpif_ipfix *di,
const struct ofproto_ipfix_bridge_exporter_options *bridge_exporter_options,
const struct ofproto_ipfix_flow_exporter_options *flow_exporters_options,
size_t n_flow_exporters_options) OVS_EXCLUDED(mutex)
{
int i;
struct ofproto_ipfix_flow_exporter_options *options;
struct dpif_ipfix_flow_exporter_map_node *node, *next;
ovs_mutex_lock(&mutex);
dpif_ipfix_bridge_exporter_set_options(&di->bridge_exporter,
bridge_exporter_options);
/* Add new flow exporters and update current flow exporters. */
options = (struct ofproto_ipfix_flow_exporter_options *)
flow_exporters_options;
for (i = 0; i < n_flow_exporters_options; i++) {
node = dpif_ipfix_find_flow_exporter_map_node(
di, options->collector_set_id);
if (!node) {
node = xzalloc(sizeof *node);
dpif_ipfix_flow_exporter_init(&node->exporter);
hmap_insert(&di->flow_exporter_map, &node->node,
hash_int(options->collector_set_id, 0));
}
if (!dpif_ipfix_flow_exporter_set_options(&node->exporter, options)) {
remove_flow_exporter(di, node);
}
options++;
}
/* Remove dropped flow exporters, if any needs to be removed. */
HMAP_FOR_EACH_SAFE (node, next, node, &di->flow_exporter_map) {
/* This is slow but doesn't take any extra memory, and
* this table is not supposed to contain many rows anyway. */
options = (struct ofproto_ipfix_flow_exporter_options *)
flow_exporters_options;
for (i = 0; i < n_flow_exporters_options; i++) {
if (node->exporter.options->collector_set_id
== options->collector_set_id) {
break;
}
options++;
}
if (i == n_flow_exporters_options) { // Not found.
remove_flow_exporter(di, node);
}
}
ovs_mutex_unlock(&mutex);
}
struct dpif_ipfix *
dpif_ipfix_create(void)
{
struct dpif_ipfix *di;
di = xzalloc(sizeof *di);
dpif_ipfix_bridge_exporter_init(&di->bridge_exporter);
hmap_init(&di->flow_exporter_map);
hmap_init(&di->tunnel_ports);
ovs_refcount_init(&di->ref_cnt);
return di;
}
struct dpif_ipfix *
dpif_ipfix_ref(const struct dpif_ipfix *di_)
{
struct dpif_ipfix *di = CONST_CAST(struct dpif_ipfix *, di_);
if (di) {
ovs_refcount_ref(&di->ref_cnt);
}
return di;
}
uint32_t
dpif_ipfix_get_bridge_exporter_probability(const struct dpif_ipfix *di)
OVS_EXCLUDED(mutex)
{
uint32_t ret;
ovs_mutex_lock(&mutex);
ret = di->bridge_exporter.probability;
ovs_mutex_unlock(&mutex);
return ret;
}
bool
dpif_ipfix_get_bridge_exporter_input_sampling(const struct dpif_ipfix *di)
OVS_EXCLUDED(mutex)
{
bool ret = false;
ovs_mutex_lock(&mutex);
if (di->bridge_exporter.options) {
ret = di->bridge_exporter.options->enable_input_sampling;
}
ovs_mutex_unlock(&mutex);
return ret;
}
bool
dpif_ipfix_get_bridge_exporter_output_sampling(const struct dpif_ipfix *di)
OVS_EXCLUDED(mutex)
{
bool ret = false;
ovs_mutex_lock(&mutex);
if (di->bridge_exporter.options) {
ret = di->bridge_exporter.options->enable_output_sampling;
}
ovs_mutex_unlock(&mutex);
return ret;
}
bool
dpif_ipfix_get_bridge_exporter_tunnel_sampling(const struct dpif_ipfix *di)
OVS_EXCLUDED(mutex)
{
bool ret = false;
ovs_mutex_lock(&mutex);
if (di->bridge_exporter.options) {
ret = di->bridge_exporter.options->enable_tunnel_sampling;
}
ovs_mutex_unlock(&mutex);
return ret;
}
static void
dpif_ipfix_clear(struct dpif_ipfix *di) OVS_REQUIRES(mutex)
{
struct dpif_ipfix_flow_exporter_map_node *exp_node, *exp_next;
struct dpif_ipfix_port *dip, *next;
dpif_ipfix_bridge_exporter_clear(&di->bridge_exporter);
HMAP_FOR_EACH_SAFE (exp_node, exp_next, node, &di->flow_exporter_map) {
hmap_remove(&di->flow_exporter_map, &exp_node->node);
dpif_ipfix_flow_exporter_destroy(&exp_node->exporter);
free(exp_node);
}
HMAP_FOR_EACH_SAFE (dip, next, hmap_node, &di->tunnel_ports) {
dpif_ipfix_del_port(di, dip);
}
}
void
dpif_ipfix_unref(struct dpif_ipfix *di) OVS_EXCLUDED(mutex)
{
if (di && ovs_refcount_unref_relaxed(&di->ref_cnt) == 1) {
ovs_mutex_lock(&mutex);
dpif_ipfix_clear(di);
dpif_ipfix_bridge_exporter_destroy(&di->bridge_exporter);
hmap_destroy(&di->flow_exporter_map);
hmap_destroy(&di->tunnel_ports);
free(di);
ovs_mutex_unlock(&mutex);
}
}
static void
ipfix_init_header(uint32_t export_time_sec, uint32_t seq_number,
uint32_t obs_domain_id, struct dp_packet *msg)
{
struct ipfix_header *hdr;
hdr = dp_packet_put_zeros(msg, sizeof *hdr);
hdr->version = htons(IPFIX_VERSION);
hdr->length = htons(sizeof *hdr); /* Updated in ipfix_send_msg. */
hdr->export_time = htonl(export_time_sec);
hdr->seq_number = htonl(seq_number);
hdr->obs_domain_id = htonl(obs_domain_id);
}
static void
ipfix_send_msg(const struct collectors *collectors, struct dp_packet *msg)
{
struct ipfix_header *hdr;
/* Adjust the length in the header. */
hdr = dp_packet_data(msg);
hdr->length = htons(dp_packet_size(msg));
collectors_send(collectors, dp_packet_data(msg), dp_packet_size(msg));
dp_packet_set_size(msg, 0);