/* * Copyright (c) 2018 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 NAT44 endpoint-dependent inside to outside network translation */ #include #include #include #include #include #include #include #include #include #include #include #include #include static char *nat_in2out_ed_error_strings[] = { #define _(sym,string) string, foreach_nat_in2out_ed_error #undef _ }; typedef enum { NAT_IN2OUT_ED_NEXT_LOOKUP, NAT_IN2OUT_ED_NEXT_DROP, NAT_IN2OUT_ED_NEXT_ICMP_ERROR, NAT_IN2OUT_ED_NEXT_SLOW_PATH, NAT_IN2OUT_ED_NEXT_REASS, NAT_IN2OUT_ED_N_NEXT, } nat_in2out_ed_next_t; typedef struct { u32 sw_if_index; u32 next_index; u32 session_index; u32 is_slow_path; } nat_in2out_ed_trace_t; static u8 * format_nat_in2out_ed_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *); char *tag; tag = t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" : "NAT44_IN2OUT_ED_FAST_PATH"; s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag, t->sw_if_index, t->next_index, t->session_index); return s; } #ifndef CLIB_MARCH_VARIANT int nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) { snat_main_t *sm = &snat_main; nat44_is_idle_session_ctx_t *ctx = arg; snat_session_t *s; u64 sess_timeout_time; nat_ed_ses_key_t ed_key; clib_bihash_kv_16_8_t ed_kv; int i; snat_address_t *a; snat_session_key_t key; snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, ctx->thread_index); s = pool_elt_at_index (tsm->sessions, kv->value); sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); if (ctx->now >= sess_timeout_time) { if (is_fwd_bypass_session (s)) goto delete; ed_key.l_addr = s->out2in.addr; ed_key.r_addr = s->ext_host_addr; ed_key.fib_index = s->out2in.fib_index; if (snat_is_unk_proto_session (s)) { ed_key.proto = s->in2out.port; ed_key.r_port = 0; ed_key.l_port = 0; } else { ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); ed_key.l_port = s->out2in.port; ed_key.r_port = s->ext_host_port; } ed_kv.key[0] = ed_key.as_u64[0]; ed_kv.key[1] = ed_key.as_u64[1]; if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0)) nat_elog_warn ("out2in_ed key del failed"); if (snat_is_unk_proto_session (s)) goto delete; snat_ipfix_logging_nat44_ses_delete (ctx->thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->in2out.protocol, s->in2out.port, s->out2in.port, s->in2out.fib_index); nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, &s->ext_host_nat_addr, s->ext_host_nat_port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->in2out.protocol, is_twice_nat_session (s)); nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->out2in.protocol, s->out2in.fib_index, ctx->thread_index); if (is_twice_nat_session (s)) { for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) { key.protocol = s->in2out.protocol; key.port = s->ext_host_nat_port; a = sm->twice_nat_addresses + i; if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) { snat_free_outside_address_and_port (sm->twice_nat_addresses, ctx->thread_index, &key); break; } } } if (snat_is_session_static (s)) goto delete; snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, &s->out2in); delete: nat44_delete_session (sm, s, ctx->thread_index); return 1; } return 0; } #endif static inline u32 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0, icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t * node, u32 next0, f64 now, u32 thread_index, snat_session_t ** p_s0) { next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, thread_index, p_s0, 0); snat_session_t *s0 = *p_s0; if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP && s0)) { /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (sm->vlib_main, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); } return next0; } static u32 slow_path_ed (snat_main_t * sm, vlib_buffer_t * b, u32 rx_fib_index, clib_bihash_kv_16_8_t * kv, snat_session_t ** sessionp, vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now, tcp_header_t * tcp) { snat_session_t *s = 0; snat_user_t *u; snat_session_key_t key0, key1; lb_nat_type_t lb = 0, is_sm = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key; u32 proto = ip_proto_to_snat_proto (key->proto); nat_outside_fib_t *outside_fib; fib_node_index_t fei = FIB_NODE_INDEX_INVALID; u8 identity_nat; fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP4, .fp_len = 32, .fp_addr = { .ip4.as_u32 = key->r_addr.as_u32, }, }; nat44_is_idle_session_ctx_t ctx; if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_ipfix_logging_max_sessions (thread_index, sm->max_translations); nat_elog_notice ("maximum sessions exceeded"); return NAT_IN2OUT_ED_NEXT_DROP; } key0.addr = key->l_addr; key0.port = key->l_port; key1.protocol = key0.protocol = proto; key0.fib_index = rx_fib_index; key1.fib_index = sm->outside_fib_index; /* First try to match static mapping by local address and port */ if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat)) { /* Try to create dynamic translation */ if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index, thread_index, &key1, sm->port_per_thread, tsm->snat_thread_index)) { nat_elog_notice ("addresses exhausted"); b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS]; return NAT_IN2OUT_ED_NEXT_DROP; } } else { if (PREDICT_FALSE (identity_nat)) { *sessionp = s; return next; } is_sm = 1; } if (proto == SNAT_PROTOCOL_TCP) { if (!tcp_is_init (tcp)) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN]; return NAT_IN2OUT_ED_NEXT_DROP; } } u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index); if (!u) { nat_elog_warn ("create NAT user failed"); if (!is_sm) snat_free_outside_address_and_port (sm->addresses, thread_index, &key1); return NAT_IN2OUT_ED_NEXT_DROP; } s = nat_ed_session_alloc (sm, u, thread_index, now); if (!s) { nat44_delete_user_with_no_session (sm, u, thread_index); nat_elog_warn ("create NAT session failed"); if (!is_sm) snat_free_outside_address_and_port (sm->addresses, thread_index, &key1); return NAT_IN2OUT_ED_NEXT_DROP; } user_session_increment (sm, u, is_sm); if (is_sm) s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; if (lb) s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; s->ext_host_addr = key->r_addr; s->ext_host_port = key->r_port; s->in2out = key0; s->out2in = key1; s->out2in.protocol = key0.protocol; switch (vec_len (sm->outside_fibs)) { case 0: s->out2in.fib_index = sm->outside_fib_index; break; case 1: s->out2in.fib_index = sm->outside_fibs[0].fib_index; break; default: /* *INDENT-OFF* */ vec_foreach (outside_fib, sm->outside_fibs) { fei = fib_table_lookup (outside_fib->fib_index, &pfx); if (FIB_NODE_INDEX_INVALID != fei) { if (fib_entry_get_resolving_interface (fei) != ~0) { s->out2in.fib_index = outside_fib->fib_index; break; } } } /* *INDENT-ON* */ break; } /* Add to lookup tables */ kv->value = s - tsm->sessions; ctx.now = now; ctx.thread_index = thread_index; if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv, nat44_i2o_ed_is_idle_session_cb, &ctx)) nat_elog_notice ("in2out-ed key add failed"); make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index, key1.port, key->r_port); kv->value = s - tsm->sessions; if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv, nat44_o2i_ed_is_idle_session_cb, &ctx)) nat_elog_notice ("out2in-ed key add failed"); *sessionp = s; /* log NAT event */ snat_ipfix_logging_nat44_ses_create (thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->in2out.protocol, s->in2out.port, s->out2in.port, s->in2out.fib_index); nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, &s->ext_host_nat_addr, s->ext_host_nat_port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->in2out.protocol, 0); nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, &s->ext_host_nat_addr, s->ext_host_nat_port, s->in2out.protocol, s->in2out.fib_index, s->flags, thread_index, 0); return next; } static_always_inline int nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, u32 sw_if_index, ip4_header_t * ip, u32 proto, u32 rx_fib_index, u32 thread_index) { udp_header_t *udp = ip4_next_header (ip); snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; clib_bihash_kv_16_8_t kv, value; snat_session_key_t key0, key1; make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol, sm->outside_fib_index, udp->dst_port, udp->src_port); /* NAT packet aimed at external address if */ /* has active sessions */ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) { key0.addr = ip->dst_address; key0.port = udp->dst_port; key0.protocol = proto; key0.fib_index = sm->outside_fib_index; /* or is static mappings */ if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0)) return 0; } else return 0; if (sm->forwarding_enabled) return 1; return snat_not_translate_fast (sm, node, sw_if_index, ip, proto, rx_fib_index); } static_always_inline int nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, u32 thread_index, f64 now, vlib_main_t * vm, vlib_buffer_t * b) { nat_ed_ses_key_t key; clib_bihash_kv_16_8_t kv, value; udp_header_t *udp; snat_session_t *s = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; if (!sm->forwarding_enabled) return 0; if (ip->protocol == IP_PROTOCOL_ICMP) { key.as_u64[0] = key.as_u64[1] = 0; if (get_icmp_i2o_ed_key (ip, &key)) return 0; key.fib_index = 0; kv.key[0] = key.as_u64[0]; kv.key[1] = key.as_u64[1]; } else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) { udp = ip4_next_header (ip); make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, udp->src_port, udp->dst_port); } else { make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0, 0); } if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) { s = pool_elt_at_index (tsm->sessions, value.value); if (is_fwd_bypass_session (s)) { if (ip->protocol == IP_PROTOCOL_TCP) { tcp_header_t *tcp = ip4_next_header (ip); if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index)) return 1; } /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); return 1; } else return 0; } return 0; } static_always_inline int nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port, u16 dst_port, u32 thread_index, u32 rx_sw_if_index, u32 tx_sw_if_index) { clib_bihash_kv_16_8_t kv, value; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; snat_interface_t *i; snat_session_t *s; u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index); u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index); /* src NAT check */ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index, src_port, dst_port); if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) { s = pool_elt_at_index (tsm->sessions, value.value); if (nat44_is_ses_
/*
 * Copyright (c) 2015 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 VXLAN GPE definitions
 *
*/
#ifndef included_vnet_vxlan_gpe_h
#define included_vnet_vxlan_gpe_h

#include <vppinfra/error.h>
#include <vppinfra/hash.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_output.h>
#include <vnet/l2/l2_bd.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/udp/udp.h>
#include <vnet/dpo/dpo.h>
#include <vnet/adj/adj_types.h>

/**
 * @brief VXLAN GPE header struct
 *
 */
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
  /** 20 bytes */
  ip4_header_t ip4;
  /** 8 bytes */
  udp_header_t udp;
  /** 8 bytes */
  vxlan_gpe_header_t vxlan;
}) ip4_vxlan_gpe_header_t;
/* *INDENT-ON* */

/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
  /** 40 bytes */
  ip6_header_t ip6;
  /** 8 bytes */
  udp_header_t udp;
  /** 8 bytes */
  vxlan_gpe_header_t vxlan;
}) ip6_vxlan_gpe_header_t;
/* *INDENT-ON* */

/**
 * @brief Key struct for IPv4 VXLAN GPE tunnel.
 * Key fields: local remote, vni
 * all fields in NET byte order
 * VNI shifted 8 bits
 */
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct {
  union {
    struct {
      u32 local;
      u32 remote;

      u32 vni;
      u32 pad;
    };
    u64 as_u64[2];
  };
}) vxlan4_gpe_tunnel_key_t;
/* *INDENT-ON* */

/**
 * @brief Key struct for IPv6 VXLAN GPE tunnel.
 * Key fields: local remote, vni
 * all fields in NET byte order
 * VNI shifted 8 bits
 */
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct {
  ip6_address_t local;
  ip6_address_t remote;
  u32 vni;
}) vxlan6_gpe_tunnel_key_t;
/* *INDENT-ON* */

/**
 * @brief Struct for VXLAN GPE tunnel
 */
typedef struct
{
  /* Required for pool_get_aligned */
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);

  /** Rewrite string. $$$$ embed vnet_rewrite header */
  u8 *rewrite;

  /** encapsulated protocol */
  u8 protocol;

  /* FIB DPO for IP forwarding of VXLAN-GPE encap packet */
  dpo_id_t next_dpo;
  /** tunnel local address */
  ip46_address_t local;
  /** tunnel remote address */
  ip46_address_t remote;

  /* mcast packet output intfc index (used only if dst is mcast) */
  u32 mcast_sw_if_index;

  /** FIB indices - tunnel partner lookup here */
  u32 encap_fib_index;
  /** FIB indices - inner IP packet lookup here */
  u32 decap_fib_index;

  /** VXLAN GPE VNI in HOST byte order, shifted left 8 bits */
  u32 vni;

  /** vnet intfc hw_if_index */
  u32 hw_if_index;
  /** vnet intfc sw_if_index */
  u32 sw_if_index;

  /** flags */
  u32 flags;

  /** rewrite size for dynamic plugins like iOAM */
  u8 rewrite_size;

  /** Next node after VxLAN-GPE encap */
  uword encap_next_node;

  /**
   * Linkage into the FIB object graph
   */
  fib_node_t node;

  /*
   * The FIB entry for (depending on VXLAN-GPE tunnel is unicast or mcast)
   * sending unicast VXLAN-GPE encap packets or receiving mcast VXLAN-GPE packets
   */
  fib_node_index_t fib_entry_index;
  adj_index_t mcast_adj_index;

  /**
   * The tunnel is a child of the FIB entry for its destination. This is
   * so it receives updates when the forwarding information for that entry
   * changes.
   * The tunnels sibling index on the FIB entry's dependency list.
   */
  u32 sibling_index;

} vxlan_gpe_tunnel_t;

/** Flags for vxlan_gpe_tunnel_t */
#define VXLAN_GPE_TUNNEL_IS_IPV4	1

/** next nodes for VXLAN GPE input */
#define foreach_vxlan_gpe_input_next        \
_(DROP, "error-drop")                           \
_(IP4_INPUT, "ip4-input")                       \
_(IP6_INPUT, "ip6-input")                       \
_(L2_INPUT, "l2-input")

/** struct for next nodes for VXLAN GPE input */
typedef enum
{
#define _(s,n) VXLAN_GPE_INPUT_NEXT_##s,
  foreach_vxlan_gpe_input_next
#undef _
    VXLAN_GPE_INPUT_N_NEXT,
} vxlan_gpe_input_next_t;

/** struct for VXLAN GPE errors */
typedef enum
{
#define vxlan_gpe_error(n,s) VXLAN_GPE_ERROR_##n,
#include <vnet/vxlan-gpe/vxlan_gpe_error.def>
#undef vxlan_gpe_error
  VXLAN_GPE_N_ERROR,
} vxlan_gpe_input_error_t;

/** Struct for VXLAN GPE node state */
typedef struct
{
  /** vector of encap tunnel instances */
  vxlan_gpe_tunnel_t *tunnels;

  /** lookup IPv4 VXLAN GPE tunnel by key */
  uword *vxlan4_gpe_tunnel_by_key;
  /** lookup IPv6 VXLAN GPE tunnel by key */
  uword *vxlan6_gpe_tunnel_by_key;

  /* local VTEP IPs ref count used by vxlan-bypass node to check if
     received VXLAN packet DIP matches any local VTEP address */
  uword *vtep4;			/* local ip4 VTEPs keyed on their ip4 addr */
  uword *vtep6;			/* local ip6 VTEPs keyed on their ip6 addr */
  /* mcast shared info */
  uword *mcast_shared;		/* keyed on mcast ip46 addr */
  /** Free vlib hw_if_indices */
  u32 *free_vxlan_gpe_tunnel_hw_if_indices;

  /** Mapping from sw_if_index to tunnel index */
  u32 *tunnel_index_by_sw_if_index;

  /** State convenience vlib_main_t */
  vlib_main_t *vlib_main;
  /** State convenience vnet_main_t */
  vnet_main_t *vnet_main;

  /** List of next nodes for the decap indexed on protocol */
  uword decap_next_node_list[VXLAN_GPE_PROTOCOL_MAX];
} vxlan_gpe_main_t;

extern vxlan_gpe_main_t vxlan_gpe_main;

extern vlib_node_registration_t vxlan_gpe_encap_node;
extern vlib_node_registration_t vxlan4_gpe_input_node;
extern vlib_node_registration_t vxlan6_gpe_input_node;

u8 *format_vxlan_gpe_encap_trace (u8 * s, va_list * args);

/** Struct for VXLAN GPE add/del args */
typedef struct
{
  u8 is_add;
  u8 is_ip6;
  ip46_address_t local, remote;
  u8 protocol;
  u32 mcast_sw_if_index;
  u32 encap_fib_index;
  u32 decap_fib_index;
  u32 vni;
} vnet_vxlan_gpe_add_del_tunnel_args_t;


int vnet_vxlan_gpe_add_del_tunnel
  (vnet_vxlan_gpe_add_del_tunnel_args_t * a, u32 * sw_if_indexp);


int vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
			u8 protocol_override, uword encap_next_node);
int vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
			u8 protocol_override, uword encap_next_node);

/**
 * @brief Struct for defining VXLAN GPE next nodes
 */
typedef enum
{
  VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP,
  VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP,
  VXLAN_GPE_ENCAP_NEXT_DROP,
  VXLAN_GPE_ENCAP_N_NEXT
} vxlan_gpe_encap_next_t;


void vxlan_gpe_unregister_decap_protocol (u8 protocol_id,
					  uword next_node_index);

void vxlan_gpe_register_decap_protocol (u8 protocol_id,
					uword next_node_index);

void vnet_int_vxlan_gpe_bypass_mode (u32 sw_if_index, u8 is_ip6,
				     u8 is_enable);

#endif /* included_vnet_vxlan_gpe_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
lib_node_increment_counter (vm, stats_node_index, NAT_IN2OUT_ED_ERROR_ICMP_PACKETS, icmp_packets); vlib_node_increment_counter (vm, stats_node_index, NAT_IN2OUT_ED_ERROR_OTHER_PACKETS, other_packets); vlib_node_increment_counter (vm, stats_node_index, NAT_IN2OUT_ED_ERROR_FRAGMENTS, fragments); return frame->n_vectors; } VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_node) = { .name = "nat44-ed-in2out", .vector_size = sizeof (u32), .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass", }, }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = { .name = "nat44-ed-in2out-output", .vector_size = sizeof (u32), .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass-output", }, }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = { .name = "nat44-ed-in2out-slowpath", .vector_size = sizeof (u32), .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass", }, }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = { .name = "nat44-ed-in2out-output-slowpath", .vector_size = sizeof (u32), .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass", }, }; /* *INDENT-ON* */ static inline uword nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int is_output_feature) { u32 n_left_from, *from, *to_next; nat_in2out_ed_next_t next_index; u32 pkts_processed = 0, cached_fragments = 0; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; snat_main_per_thread_data_t *per_thread_data = &sm->per_thread_data[thread_index]; u32 *fragments_to_drop = 0; u32 *fragments_to_loopback = 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; u32 iph_offset0 = 0; vlib_buffer_t *b0; u32 next0; u8 cached0 = 0; ip4_header_t *ip0 = 0; nat_reass_ip4_t *reass0; udp_header_t *udp0; tcp_header_t *tcp0; icmp46_header_t *icmp0; clib_bihash_kv_16_8_t kv0, value0; snat_session_t *s0 = 0; u16 old_port0, new_port0; ip_csum_t sum0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); next0 = NAT_IN2OUT_ED_NEXT_LOOKUP; sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); if (PREDICT_FALSE (nat_reass_is_drop_frag (0))) { next0 = NAT_IN2OUT_ED_NEXT_DROP; b0->error = node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT]; goto trace0; } if (is_output_feature) iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); udp0 = ip4_next_header (ip0); tcp0 = (tcp_header_t *) udp0; icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_snat_proto (ip0->protocol); reass0 = nat_ip4_reass_find_or_create (ip0->src_address, ip0->dst_address, ip0->fragment_id, ip0->protocol, 1, &fragments_to_drop); if (PREDICT_FALSE (!reass0)) { next0 = NAT_IN2OUT_ED_NEXT_DROP; b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_REASS]; nat_elog_notice ("maximum reassemblies exceeded"); goto trace0; } if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) { if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) { if (is_output_feature) { if (PREDICT_FALSE (nat_not_translate_output_feature_fwd (sm, ip0, thread_index, now, vm, b0))) reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; goto trace0; } next0 = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, now, thread_index, &s0); if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP)) { if (s0) reass0->sess_index = s0 - per_thread_data->sessions; else reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); } goto trace0; } make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol, rx_fib_index0, udp0->src_port, udp0->dst_port); if (clib_bihash_search_16_8 (&per_thread_data->in2out_ed, &kv0, &value0)) { if (is_output_feature) { if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (sm, ip0, ip0->protocol, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX]))) { reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); goto trace0; } } else { if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0, thread_index))) { reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); goto trace0; } } next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, next0, thread_index, now, tcp0); if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP)) goto trace0; if (PREDICT_FALSE (!s0)) { reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; goto trace0; } reass0->sess_index = s0 - per_thread_data->sessions; } else { s0 = pool_elt_at_index (per_thread_data->sessions, value0.value); reass0->sess_index = value0.value; } nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); } else { if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE) goto trace0; if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0)) { if (nat_ip4_reass_add_fragment (thread_index, reass0, bi0, &fragments_to_drop)) { b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_FRAG]; nat_elog_notice ("maximum fragments per reassembly exceeded"); next0 = NAT_IN2OUT_ED_NEXT_DROP; goto trace0; } cached0 = 1; goto trace0; } s0 = pool_elt_at_index (per_thread_data->sessions, reass0->sess_index); } old_addr0 = ip0->src_address.as_u32; ip0->src_address = s0->out2in.addr; new_addr0 = ip0->src_address.as_u32; if (!is_output_feature) vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, src_address /* changed member */ ); if (PREDICT_FALSE (is_twice_nat_session (s0))) sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); ip0->checksum = ip_csum_fold (sum0); if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) { if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) { old_port0 = tcp0->src_port; tcp0->src_port = s0->out2in.port; new_port0 = tcp0->src_port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ ); sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t /* cheat */ , length /* changed member */ ); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, tcp0->dst_port, s0->ext_host_port, ip4_header_t, length); tcp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } tcp0->checksum = ip_csum_fold (sum0); } else { old_port0 = udp0->src_port; udp0->src_port = s0->out2in.port; udp0->checksum = 0; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } } } /* Hairpinning */ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port, s0->ext_host_port, proto0, 1); /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { nat44_reass_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->cached = cached0; t->sw_if_index = sw_if_index0; t->next_index = next0; } if (cached0) { n_left_to_next++; to_next--; cached_fragments++; } else { pkts_processed += next0 != NAT_IN2OUT_ED_NEXT_DROP; /* verify speculative enqueue, maybe switch current next frame */ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } if (n_left_from == 0 && vec_len (fragments_to_loopback)) { from = vlib_frame_vector_args (frame); u32 len = vec_len (fragments_to_loopback); if (len <= VLIB_FRAME_SIZE) { clib_memcpy_fast (from, fragments_to_loopback, sizeof (u32) * len); n_left_from = len; vec_reset_length (fragments_to_loopback); } else { clib_memcpy_fast (from, fragments_to_loopback + (len - VLIB_FRAME_SIZE), sizeof (u32) * VLIB_FRAME_SIZE); n_left_from = VLIB_FRAME_SIZE; _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE; } } } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } vlib_node_increment_counter (vm, sm->ed_in2out_reass_node_index, NAT_IN2OUT_ED_ERROR_PROCESSED_FRAGMENTS, pkts_processed); vlib_node_increment_counter (vm, sm->ed_in2out_reass_node_index, NAT_IN2OUT_ED_ERROR_CACHED_FRAGMENTS, cached_fragments); nat_send_all_to_node (vm, fragments_to_drop, node, &node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT], NAT_IN2OUT_ED_NEXT_DROP); vec_free (fragments_to_drop); vec_free (fragments_to_loopback); return frame->n_vectors; } VLIB_NODE_FN (nat44_ed_in2out_reass_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = { .name = "nat44-ed-in2out-reass", .vector_size = sizeof (u32), .format_trace = format_nat44_reass_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass", }, }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_in2out_reass_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = { .name = "nat44-ed-in2out-reass-output", .vector_size = sizeof (u32), .format_trace = format_nat44_reass_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .n_next_nodes = NAT_IN2OUT_ED_N_NEXT, .next_nodes = { [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop", [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output", [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath", [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error", [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */