/
pkt_flow_info.h
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/
pkt_flow_info.h
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#ifndef __agent_pkt_flow_info_h_
#define __agent_pkt_flow_info_h_
class VrfEntry;
class Interface;
class VnEntry;
class VmEntry;
class FlowTable;
class FlowEntry;
class AgentRoute;
struct PktInfo;
struct MatchPolicy;
typedef map<int, int> FlowRouteRefMap;
struct PktControlInfo {
PktControlInfo() :
vrf_(NULL), intf_(NULL), rt_(NULL), vn_(NULL), vm_(NULL),
vlan_nh_(false), vlan_tag_(0), nh_(0) { }
virtual ~PktControlInfo() { }
const VrfEntry *vrf_;
const Interface *intf_;
const AgentRoute *rt_;
const VnEntry *vn_;
const VmEntry *vm_;
bool vlan_nh_;
uint16_t vlan_tag_;
// The NH-ID field used as key in the flow
uint32_t nh_;
};
class PktFlowInfo {
public:
static const int kLinkLocalInvalidFd = -1;
static const Ip4Address kDefaultIpv4;
static const Ip6Address kDefaultIpv6;
static const int kBgpRouterServiceInvalidFd = -1;
PktFlowInfo(Agent *a, boost::shared_ptr<PktInfo> info, FlowTable *ftable) :
l3_flow(info->l3_forwarding), family(info->family), pkt(info),
flow_table(ftable), agent(a),
flow_source_vrf(-1), flow_dest_vrf(-1), nat_done(false),
nat_ip_saddr(), nat_ip_daddr(), nat_sport(0), nat_dport(0), nat_vrf(0),
nat_dest_vrf(0), dest_vrf(0), acl(NULL), ingress(false),
short_flow(false), local_flow(false), linklocal_flow(false),
tcp_ack(false), linklocal_bind_local_port(false),
linklocal_src_port_fd(kLinkLocalInvalidFd),
ecmp(false), in_component_nh_idx(-1), out_component_nh_idx(-1),
trap_rev_flow(false), fip_snat(false), fip_dnat(false), snat_fip(),
short_flow_reason(0), peer_vrouter(), tunnel_type(TunnelType::INVALID),
flood_unknown_unicast(false), bgp_router_service_flow(false),
alias_ip_flow(false), ttl(0), ecmp_component_affinity_nh(NULL) {
}
static bool ComputeDirection(const Interface *intf);
void CheckLinkLocal(const PktInfo *pkt);
void LinkLocalServiceFromVm(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void LinkLocalServiceFromHost(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void LinkLocalServiceTranslate(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void BgpRouterServiceFromVm(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void BgpRouterServiceTranslate(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void FloatingIpSNat(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void FloatingIpDNat(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void IngressProcess(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void EgressProcess(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
void Add(const PktInfo *pkt, PktControlInfo *in,
PktControlInfo *out);
bool Process(const PktInfo *pkt, PktControlInfo *in, PktControlInfo *out);
static bool GetIngressNwPolicyAclList(const Interface *intf,
const VnEntry *vn,
MatchPolicy *m_policy);
void RewritePktInfo(uint32_t index);
void GetEcmpCompositeAffinityNh();
bool VrfTranslate(const PktInfo *pkt, PktControlInfo *ctrl,
PktControlInfo *rev_flow, const IpAddress &src_ip,
bool nat_flow);
void UpdateFipStatsInfo(FlowEntry *flow, FlowEntry *rflow, const PktInfo *p,
const PktControlInfo *in, const PktControlInfo *o);
const NextHop *TunnelToNexthop(const PktInfo *pkt);
void ChangeVrf(const PktInfo *pkt, PktControlInfo *info,
const VrfEntry *vrf);
bool UnknownUnicastFlow(const PktInfo *p,
const PktControlInfo *in_info,
const PktControlInfo *out_info);
void GenerateTrafficSeen(const PktInfo *pkt, const PktControlInfo *in);
void ApplyFlowLimits(const PktControlInfo *in, const PktControlInfo *out);
void LinkLocalPortBind(const PktInfo *pkt, const PktControlInfo *in,
FlowEntry *flow);
bool IngressRouteAllowNatLookup(const AgentRoute *in_rt,
const AgentRoute *out_rt,
uint32_t sport,
uint32_t dport,
const Interface *intf);
bool EgressRouteAllowNatLookup(const AgentRoute *in_rt,
const AgentRoute *out_rt,
uint32_t sport,
uint32_t dport,
const Interface *intf);
public:
void UpdateRoute(const AgentRoute **rt, const VrfEntry *vrf,
const IpAddress &addr, const MacAddress &mac,
FlowRouteRefMap &ref_map);
uint8_t RouteToPrefixLen(const AgentRoute *route);
void CalculatePort(const PktInfo *p, const Interface *intf);
void SetPktInfo(boost::shared_ptr<PktInfo> info);
bool RouteAllowNatLookupCommon(const AgentRoute *rt,
uint32_t sport,
uint32_t dport,
const Interface *intf);
bool IsBgpRouterServiceRoute(const AgentRoute *in_rt,
const AgentRoute *out_rt,
const Interface *intf,
uint32_t sport,
uint32_t dport);
void UpdateEvictedFlowStats(const PktInfo *pkt);
bool l3_flow;
Address::Family family;
boost::shared_ptr<PktInfo> pkt;
FlowTable *flow_table;
Agent *agent;
uint32_t flow_source_vrf;
uint32_t flow_dest_vrf;
// map for references to the routes which were ignored due to more specific
// route this will be used to trigger flow re-compute to use more specific
// on route add. key for the map is vrf and data is prefix length
FlowRouteRefMap flow_source_plen_map;
FlowRouteRefMap flow_dest_plen_map;
// NAT addresses
bool nat_done;
IpAddress nat_ip_saddr;
IpAddress nat_ip_daddr;
uint32_t nat_sport;
uint32_t nat_dport;
// VRF for matching the NAT flow
uint32_t nat_vrf;
// Modified VRF for the NAT flow
// After flow processing, packet is assigned this VRF
uint32_t nat_dest_vrf;
// Modified VRF for the forward flow
// After flow processing, packet is assigned this VRF
uint32_t dest_vrf;
// Intermediate fields used in creating flows
const AclDBEntry *acl;
// Ingress flow or egress flow
bool ingress;
bool short_flow;
bool local_flow;
bool linklocal_flow;
bool tcp_ack;
bool linklocal_bind_local_port;
int linklocal_src_port_fd;
bool ecmp;
uint32_t in_component_nh_idx;
uint32_t out_component_nh_idx;
bool trap_rev_flow;
// Following fields are required for FIP stats accounting
bool fip_snat;
bool fip_dnat;
IpAddress snat_fip;
uint16_t short_flow_reason;
std::string peer_vrouter;
TunnelType tunnel_type;
// flow entry being revaluated or trapped for ECMP resolution
FlowEntry *flow_entry;
bool flood_unknown_unicast;
//BGP router service info
bool bgp_router_service_flow;
// Alias IP flow
bool alias_ip_flow;
//TTL of nat'd flow especially bgp-service flows
uint8_t ttl;
// Affinity to Ecmp component NH.
// When a packet is trapped for ECMP Resolution its possible that flow is
// transition from Non-ECMP to ECMP. In that case, the ECMP index must be
// be set to unicast-nh used when flow is non-ECMP. The affinity-nh
// is set in this case.
const NextHop *ecmp_component_affinity_nh;
};
#endif // __agent_pkt_flow_info_h_