X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fsnat%2Fout2in.c;h=329d67dc3bff97b2b2560b45736f1c516df40e5c;hb=refs%2Fchanges%2F99%2F7699%2F1;hp=328f5ba4c5e4f0a6686a35c5572cf6aa29f8d5e4;hpb=665e482f2422cab52da221b019bb81993d7950f3;p=vpp.git diff --git a/src/plugins/snat/out2in.c b/src/plugins/snat/out2in.c index 328f5ba4c5e..329d67dc3bf 100644 --- a/src/plugins/snat/out2in.c +++ b/src/plugins/snat/out2in.c @@ -19,11 +19,12 @@ #include #include -#include +#include #include #include #include #include +#include #include #include @@ -80,11 +81,12 @@ static u8 * format_snat_out2in_worker_handoff_trace (u8 * s, va_list * args) vlib_node_registration_t snat_out2in_node; vlib_node_registration_t snat_out2in_fast_node; vlib_node_registration_t snat_out2in_worker_handoff_node; +vlib_node_registration_t snat_det_out2in_node; #define foreach_snat_out2in_error \ _(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ _(OUT2IN_PACKETS, "Good out2in packets processed") \ -_(BAD_ICMP_TYPE, "icmp type not echo-reply") \ +_(BAD_ICMP_TYPE, "unsupported ICMP type") \ _(NO_TRANSLATION, "No translation") typedef enum { @@ -127,7 +129,7 @@ create_session_for_static_mapping (snat_main_t *sm, snat_session_key_t in2out, snat_session_key_t out2in, vlib_node_runtime_t * node, - u32 cpu_index) + u32 thread_index) { snat_user_t *u; snat_user_key_t user_key; @@ -135,6 +137,9 @@ create_session_for_static_mapping (snat_main_t *sm, clib_bihash_kv_8_8_t kv0, value0; dlist_elt_t * per_user_translation_list_elt; dlist_elt_t * per_user_list_head_elt; + ip4_header_t *ip0; + + ip0 = vlib_buffer_get_current (b0); user_key.addr = in2out.addr; user_key.fib_index = in2out.fib_index; @@ -144,58 +149,60 @@ create_session_for_static_mapping (snat_main_t *sm, if (clib_bihash_search_8_8 (&sm->user_hash, &kv0, &value0)) { /* no, make a new one */ - pool_get (sm->per_thread_data[cpu_index].users, u); + pool_get (sm->per_thread_data[thread_index].users, u); memset (u, 0, sizeof (*u)); u->addr = in2out.addr; + u->fib_index = in2out.fib_index; - pool_get (sm->per_thread_data[cpu_index].list_pool, + pool_get (sm->per_thread_data[thread_index].list_pool, per_user_list_head_elt); u->sessions_per_user_list_head_index = per_user_list_head_elt - - sm->per_thread_data[cpu_index].list_pool; + sm->per_thread_data[thread_index].list_pool; - clib_dlist_init (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_init (sm->per_thread_data[thread_index].list_pool, u->sessions_per_user_list_head_index); - kv0.value = u - sm->per_thread_data[cpu_index].users; + kv0.value = u - sm->per_thread_data[thread_index].users; /* add user */ clib_bihash_add_del_8_8 (&sm->user_hash, &kv0, 1 /* is_add */); /* add non-traslated packets worker lookup */ - kv0.value = cpu_index; + kv0.value = thread_index; clib_bihash_add_del_8_8 (&sm->worker_by_in, &kv0, 1); } else { - u = pool_elt_at_index (sm->per_thread_data[cpu_index].users, + u = pool_elt_at_index (sm->per_thread_data[thread_index].users, value0.value); } - pool_get (sm->per_thread_data[cpu_index].sessions, s); + pool_get (sm->per_thread_data[thread_index].sessions, s); memset (s, 0, sizeof (*s)); s->outside_address_index = ~0; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + s->ext_host_addr.as_u32 = ip0->dst_address.as_u32; u->nstaticsessions++; /* Create list elts */ - pool_get (sm->per_thread_data[cpu_index].list_pool, + pool_get (sm->per_thread_data[thread_index].list_pool, per_user_translation_list_elt); - clib_dlist_init (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_init (sm->per_thread_data[thread_index].list_pool, per_user_translation_list_elt - - sm->per_thread_data[cpu_index].list_pool); + sm->per_thread_data[thread_index].list_pool); per_user_translation_list_elt->value = - s - sm->per_thread_data[cpu_index].sessions; + s - sm->per_thread_data[thread_index].sessions; s->per_user_index = - per_user_translation_list_elt - sm->per_thread_data[cpu_index].list_pool; + per_user_translation_list_elt - sm->per_thread_data[thread_index].list_pool; s->per_user_list_head_index = u->sessions_per_user_list_head_index; - clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, s->per_user_list_head_index, per_user_translation_list_elt - - sm->per_thread_data[cpu_index].list_pool); + sm->per_thread_data[thread_index].list_pool); s->in2out = in2out; s->out2in = out2in; @@ -203,12 +210,12 @@ create_session_for_static_mapping (snat_main_t *sm, /* Add to translation hashes */ kv0.key = s->in2out.as_u64; - kv0.value = s - sm->per_thread_data[cpu_index].sessions; + kv0.value = s - sm->per_thread_data[thread_index].sessions; if (clib_bihash_add_del_8_8 (&sm->in2out, &kv0, 1 /* is_add */)) clib_warning ("in2out key add failed"); kv0.key = s->out2in.as_u64; - kv0.value = s - sm->per_thread_data[cpu_index].sessions; + kv0.value = s - sm->per_thread_data[thread_index].sessions; if (clib_bihash_add_del_8_8 (&sm->out2in, &kv0, 1 /* is_add */)) clib_warning ("out2in key add failed"); @@ -223,54 +230,24 @@ create_session_for_static_mapping (snat_main_t *sm, return s; } -typedef struct { - u16 src_port, dst_port; -} tcp_udp_header_t; - -static inline u32 icmp_out2in_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 cpu_index, - snat_session_t ** p_s0) +static_always_inline +snat_out2in_error_t icmp_get_key(ip4_header_t *ip0, + snat_session_key_t *p_key0) { - snat_session_key_t key0, sm0; + icmp46_header_t *icmp0; + snat_session_key_t key0; icmp_echo_header_t *echo0, *inner_echo0 = 0; - ip4_header_t *inner_ip0 = 0; + ip4_header_t *inner_ip0; void *l4_header = 0; icmp46_header_t *inner_icmp0; - clib_bihash_kv_8_8_t kv0, value0; - snat_session_t * s0 = 0; - u32 new_addr0, old_addr0; - u16 old_id0, new_id0; - ip_csum_t sum0; - u16 checksum0; - snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data; - u8 is_error_message = 0; + icmp0 = (icmp46_header_t *) ip4_next_header (ip0); echo0 = (icmp_echo_header_t *)(icmp0+1); - key0.addr = ip0->dst_address; - key0.fib_index = rx_fib_index0; - - switch(icmp0->type) - { - case ICMP4_destination_unreachable: - case ICMP4_time_exceeded: - case ICMP4_parameter_problem: - case ICMP4_source_quench: - case ICMP4_redirect: - case ICMP4_alternate_host_address: - is_error_message = 1; - } - - if (!is_error_message) + if (!icmp_is_error_message (icmp0)) { key0.protocol = SNAT_PROTOCOL_ICMP; + key0.addr = ip0->dst_address; key0.port = echo0->identifier; } else @@ -278,6 +255,7 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, inner_ip0 = (ip4_header_t *)(echo0+1); l4_header = ip4_next_header (inner_ip0); key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol); + key0.addr = inner_ip0->src_address; switch (key0.protocol) { case SNAT_PROTOCOL_ICMP: @@ -290,52 +268,92 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, key0.port = ((tcp_udp_header_t*)l4_header)->src_port; break; default: - b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - goto out; + return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL; } } + *p_key0 = key0; + return -1; /* success */ +} + +/** + * Get address and port values to be used for packet SNAT translation + * and create session if needed + * + * @param[in,out] sm SNAT main + * @param[in,out] node SNAT node runtime + * @param[in] thread_index thread index + * @param[in,out] b0 buffer containing packet to be translated + * @param[out] p_proto protocol used for matching + * @param[out] p_value address and port after NAT translation + * @param[out] p_dont_translate if packet should not be translated + * @param d optional parameter + * @param e optional parameter + */ +u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node, + u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, + snat_session_key_t *p_value, + u8 *p_dont_translate, void *d, void *e) +{ + ip4_header_t *ip0; + icmp46_header_t *icmp0; + u32 sw_if_index0; + u32 rx_fib_index0; + snat_session_key_t key0; + snat_session_key_t sm0; + snat_session_t *s0 = 0; + u8 dont_translate = 0; + clib_bihash_kv_8_8_t kv0, value0; + u8 is_addr_only; + u32 next0 = ~0; + int err; + + ip0 = vlib_buffer_get_current (b0); + icmp0 = (icmp46_header_t *) ip4_next_header (ip0); + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + + key0.protocol = 0; + + err = icmp_get_key (ip0, &key0); + if (err != -1) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + key0.fib_index = rx_fib_index0; kv0.key = key0.as_u64; - + if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0)) { /* Try to match static mapping by external address and port, destination address and port in packet */ - if (snat_static_mapping_match(sm, key0, &sm0, 1)) + if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only)) { - ip4_address_t * first_int_addr; - - if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0)) + /* Don't NAT packet aimed at the intfc address */ + if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0, + ip0->dst_address.as_u32))) { - first_int_addr = - ip4_interface_first_address (sm->ip4_main, sw_if_index0, - 0 /* just want the address */); - rt->cached_sw_if_index = sw_if_index0; - if (first_int_addr) - rt->cached_ip4_address = first_int_addr->as_u32; - else - rt->cached_ip4_address = 0; + dont_translate = 1; + goto out; } - - /* Don't NAT packet aimed at the intfc address */ - if (PREDICT_FALSE(ip0->dst_address.as_u32 == rt->cached_ip4_address)) - goto out; - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; goto out; } - if (is_error_message) + if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && + (icmp0->type != ICMP4_echo_request || !is_addr_only))) { + b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_OUT2IN_NEXT_DROP; goto out; } /* Create session initiated by host from external network */ s0 = create_session_for_static_mapping(sm, b0, sm0, key0, - node, cpu_index); + node, thread_index); if (!s0) { @@ -344,16 +362,137 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, } } else - s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions, - value0.value); + { + if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && + icmp0->type != ICMP4_echo_request && + !icmp_is_error_message (icmp0))) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + + s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); + } + +out: + *p_proto = key0.protocol; + if (s0) + *p_value = s0->in2out; + *p_dont_translate = dont_translate; + if (d) + *(snat_session_t**)d = s0; + return next0; +} + +/** + * Get address and port values to be used for packet SNAT translation + * + * @param[in] sm SNAT main + * @param[in,out] node SNAT node runtime + * @param[in] thread_index thread index + * @param[in,out] b0 buffer containing packet to be translated + * @param[out] p_proto protocol used for matching + * @param[out] p_value address and port after NAT translation + * @param[out] p_dont_translate if packet should not be translated + * @param d optional parameter + * @param e optional parameter + */ +u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node, + u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, + snat_session_key_t *p_value, + u8 *p_dont_translate, void *d, void *e) +{ + ip4_header_t *ip0; + icmp46_header_t *icmp0; + u32 sw_if_index0; + u32 rx_fib_index0; + snat_session_key_t key0; + snat_session_key_t sm0; + u8 dont_translate = 0; + u8 is_addr_only; + u32 next0 = ~0; + int err; + + ip0 = vlib_buffer_get_current (b0); + icmp0 = (icmp46_header_t *) ip4_next_header (ip0); + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + + err = icmp_get_key (ip0, &key0); + if (err != -1) + { + b0->error = node->errors[err]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out2; + } + key0.fib_index = rx_fib_index0; + + if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only)) + { + /* Don't NAT packet aimed at the intfc address */ + if (is_interface_addr(sm, node, sw_if_index0, ip0->dst_address.as_u32)) + { + dont_translate = 1; + goto out; + } + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } - if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && !is_error_message)) + if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && + (icmp0->type != ICMP4_echo_request || !is_addr_only) && + !icmp_is_error_message (icmp0))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_OUT2IN_NEXT_DROP; goto out; } +out: + *p_value = sm0; +out2: + *p_proto = key0.protocol; + *p_dont_translate = dont_translate; + return next0; +} + +static inline u32 icmp_out2in (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, + u32 thread_index, + void *d, + void *e) +{ + snat_session_key_t sm0; + u8 protocol; + icmp_echo_header_t *echo0, *inner_echo0 = 0; + ip4_header_t *inner_ip0 = 0; + void *l4_header = 0; + icmp46_header_t *inner_icmp0; + u8 dont_translate; + u32 new_addr0, old_addr0; + u16 old_id0, new_id0; + ip_csum_t sum0; + u16 checksum0; + u32 next0_tmp; + + echo0 = (icmp_echo_header_t *)(icmp0+1); + + next0_tmp = sm->icmp_match_out2in_cb(sm, node, thread_index, b0, + &protocol, &sm0, &dont_translate, d, e); + if (next0_tmp != ~0) + next0 = next0_tmp; + if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate) + goto out; + sum0 = ip_incremental_checksum (0, icmp0, ntohs(ip0->length) - ip4_header_bytes (ip0)); checksum0 = ~ip_csum_fold (sum0); @@ -364,28 +503,34 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, } old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address = s0->in2out.addr; - new_addr0 = ip0->dst_address.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - + new_addr0 = ip0->dst_address.as_u32 = sm0.addr.as_u32; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; + sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */); ip0->checksum = ip_csum_fold (sum0); - - if (!is_error_message) + + if (!icmp_is_error_message (icmp0)) { - old_id0 = echo0->identifier; - new_id0 = s0->in2out.port; - echo0->identifier = new_id0; + new_id0 = sm0.port; + if (PREDICT_FALSE(new_id0 != echo0->identifier)) + { + old_id0 = echo0->identifier; + new_id0 = sm0.port; + echo0->identifier = new_id0; - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier /* changed member */); - icmp0->checksum = ip_csum_fold (sum0); + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, + identifier /* changed member */); + icmp0->checksum = ip_csum_fold (sum0); + } } else { + inner_ip0 = (ip4_header_t *)(echo0+1); + l4_header = ip4_next_header (inner_ip0); + if (!ip4_header_checksum_is_valid (inner_ip0)) { next0 = SNAT_OUT2IN_NEXT_DROP; @@ -393,7 +538,7 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, } old_addr0 = inner_ip0->src_address.as_u32; - inner_ip0->src_address = s0->in2out.addr; + inner_ip0->src_address = sm0.addr; new_addr0 = inner_ip0->src_address.as_u32; sum0 = icmp0->checksum; @@ -401,11 +546,14 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, src_address /* changed member */); icmp0->checksum = ip_csum_fold (sum0); - switch (key0.protocol) + switch (protocol) { case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t*)l4_header; + inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); + old_id0 = inner_echo0->identifier; - new_id0 = s0->in2out.port; + new_id0 = sm0.port; inner_echo0->identifier = new_id0; sum0 = icmp0->checksum; @@ -416,7 +564,7 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, case SNAT_PROTOCOL_UDP: case SNAT_PROTOCOL_TCP: old_id0 = ((tcp_udp_header_t*)l4_header)->src_port; - new_id0 = s0->in2out.port; + new_id0 = sm0.port; ((tcp_udp_header_t*)l4_header)->src_port = new_id0; sum0 = icmp0->checksum; @@ -429,25 +577,178 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, } } - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0); - /* Per-user LRU list maintenance for dynamic translation */ - if (!snat_is_session_static (s0)) +out: + return next0; +} + + +static inline u32 icmp_out2in_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_out2in(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 != SNAT_OUT2IN_NEXT_DROP && s0)) { - clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool, - s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool, - s0->per_user_list_head_index, - s0->per_user_index); + /* Accounting */ + s0->last_heard = now; + s0->total_pkts++; + s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0); + /* Per-user LRU list maintenance for dynamic translation */ + if (!snat_is_session_static (s0)) + { + clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, + s0->per_user_index); + clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, + s0->per_user_list_head_index, + s0->per_user_index); + } } - -out: - *p_s0 = s0; return next0; } +static void +snat_out2in_unknown_proto (snat_main_t *sm, + vlib_buffer_t * b, + ip4_header_t * ip, + u32 rx_fib_index, + u32 thread_index, + f64 now, + vlib_main_t * vm) +{ + clib_bihash_kv_8_8_t kv, value; + clib_bihash_kv_16_8_t s_kv, s_value; + snat_static_mapping_t *m; + snat_session_key_t m_key; + u32 old_addr, new_addr; + ip_csum_t sum; + snat_unk_proto_ses_key_t key; + snat_session_t * s; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + snat_user_key_t u_key; + snat_user_t *u; + dlist_elt_t *head, *elt; + + old_addr = ip->dst_address.as_u32; + + key.l_addr = ip->dst_address; + key.r_addr = ip->src_address; + key.fib_index = rx_fib_index; + key.proto = ip->protocol; + key.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 0; + s_kv.key[0] = key.as_u64[0]; + s_kv.key[1] = key.as_u64[1]; + + if (!clib_bihash_search_16_8 (&sm->out2in_unk_proto, &s_kv, &s_value)) + { + s = pool_elt_at_index (tsm->sessions, s_value.value); + new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32; + } + else + { + m_key.addr = ip->dst_address; + m_key.port = 0; + m_key.protocol = 0; + m_key.fib_index = rx_fib_index; + kv.key = m_key.as_u64; + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + return; + + m = pool_elt_at_index (sm->static_mappings, value.value); + + new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; + + u_key.addr = ip->src_address; + u_key.fib_index = m->fib_index; + kv.key = u_key.as_u64; + + /* Ever heard of the "user" = src ip4 address before? */ + if (clib_bihash_search_8_8 (&sm->user_hash, &kv, &value)) + { + /* no, make a new one */ + pool_get (tsm->users, u); + memset (u, 0, sizeof (*u)); + u->addr = ip->src_address; + u->fib_index = rx_fib_index; + + pool_get (tsm->list_pool, head); + u->sessions_per_user_list_head_index = head - tsm->list_pool; + + clib_dlist_init (tsm->list_pool, + u->sessions_per_user_list_head_index); + + kv.value = u - tsm->users; + + /* add user */ + clib_bihash_add_del_8_8 (&sm->user_hash, &kv, 1); + } + else + { + u = pool_elt_at_index (tsm->users, value.value); + } + + /* Create a new session */ + pool_get (tsm->sessions, s); + memset (s, 0, sizeof (*s)); + + s->ext_host_addr.as_u32 = ip->src_address.as_u32; + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + s->outside_address_index = ~0; + s->out2in.addr.as_u32 = old_addr; + s->out2in.fib_index = rx_fib_index; + s->in2out.addr.as_u32 = new_addr; + s->in2out.fib_index = m->fib_index; + s->in2out.port = s->out2in.port = ip->protocol; + u->nstaticsessions++; + + /* Create list elts */ + pool_get (tsm->list_pool, elt); + clib_dlist_init (tsm->list_pool, elt - tsm->list_pool); + elt->value = s - tsm->sessions; + s->per_user_index = elt - tsm->list_pool; + s->per_user_list_head_index = u->sessions_per_user_list_head_index; + clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, + s->per_user_index); + + /* Add to lookup tables */ + s_kv.value = s - tsm->sessions; + if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto, &s_kv, 1)) + clib_warning ("out2in key add failed"); + + key.l_addr = ip->dst_address; + key.fib_index = m->fib_index; + s_kv.key[0] = key.as_u64[0]; + s_kv.key[1] = key.as_u64[1]; + if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto, &s_kv, 1)) + clib_warning ("in2out key add failed"); + } + + /* Update IP checksum */ + sum = ip->checksum; + sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address); + ip->checksum = ip_csum_fold (sum); + + vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index; + + /* Accounting */ + s->last_heard = now; + s->total_pkts++; + s->total_bytes += vlib_buffer_length_in_chain (vm, b); + /* Per-user LRU list maintenance */ + clib_dlist_remove (tsm->list_pool, s->per_user_index); + clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, + s->per_user_index); +} + static uword snat_out2in_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -458,7 +759,7 @@ snat_out2in_node_fn (vlib_main_t * vm, u32 pkts_processed = 0; snat_main_t * sm = &snat_main; f64 now = vlib_time_now (vm); - u32 cpu_index = os_get_cpu_number (); + u32 thread_index = vlib_get_thread_index (); from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -517,7 +818,10 @@ snat_out2in_node_fn (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); - + + vnet_buffer (b0)->snat.flags = 0; + vnet_buffer (b1)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); udp0 = ip4_next_header (ip0); tcp0 = (tcp_header_t *) udp0; @@ -527,11 +831,6 @@ snat_out2in_node_fn (vlib_main_t * vm, rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, sw_if_index0); - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (PREDICT_FALSE (proto0 == ~0)) - goto trace0; - if (PREDICT_FALSE(ip0->ttl == 1)) { vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; @@ -542,11 +841,20 @@ snat_out2in_node_fn (vlib_main_t * vm, goto trace0; } + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == ~0)) + { + snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, + thread_index, now, vm); + goto trace0; + } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) { next0 = icmp_out2in_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, cpu_index, &s0); + next0, now, thread_index, &s0); goto trace0; } @@ -561,7 +869,7 @@ snat_out2in_node_fn (vlib_main_t * vm, { /* Try to match static mapping by external address and port, destination address and port in packet */ - if (snat_static_mapping_match(sm, key0, &sm0, 1)) + if (snat_static_mapping_match(sm, key0, &sm0, 1, 0)) { b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; /* @@ -577,7 +885,7 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Create session initiated by host from external network */ s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node, - cpu_index); + thread_index); if (!s0) { b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; @@ -586,7 +894,7 @@ snat_out2in_node_fn (vlib_main_t * vm, } } else - s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions, + s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, value0.value); old_addr0 = ip0->dst_address.as_u32; @@ -602,9 +910,9 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->ports.dst; - tcp0->ports.dst = s0->in2out.port; - new_port0 = tcp0->ports.dst; + old_port0 = tcp0->dst_port; + tcp0->dst_port = s0->in2out.port; + new_port0 = tcp0->dst_port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, @@ -630,9 +938,9 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Per-user LRU list maintenance for dynamic translation */ if (!snat_is_session_static (s0)) { - clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, s0->per_user_list_head_index, s0->per_user_index); } @@ -647,7 +955,7 @@ snat_out2in_node_fn (vlib_main_t * vm, t->next_index = next0; t->session_index = ~0; if (s0) - t->session_index = s0 - sm->per_thread_data[cpu_index].sessions; + t->session_index = s0 - sm->per_thread_data[thread_index].sessions; } pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; @@ -662,18 +970,22 @@ snat_out2in_node_fn (vlib_main_t * vm, rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, sw_if_index1); - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (PREDICT_FALSE (proto1 == ~0)) - goto trace1; - - if (PREDICT_FALSE(ip0->ttl == 1)) + if (PREDICT_FALSE(ip1->ttl == 1)) { vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, ICMP4_time_exceeded_ttl_exceeded_in_transit, 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace1; + } + + proto1 = ip_proto_to_snat_proto (ip1->protocol); + + if (PREDICT_FALSE (proto1 == ~0)) + { + snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1, + thread_index, now, vm); goto trace1; } @@ -681,7 +993,7 @@ snat_out2in_node_fn (vlib_main_t * vm, { next1 = icmp_out2in_slow_path (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, cpu_index, &s1); + next1, now, thread_index, &s1); goto trace1; } @@ -696,7 +1008,7 @@ snat_out2in_node_fn (vlib_main_t * vm, { /* Try to match static mapping by external address and port, destination address and port in packet */ - if (snat_static_mapping_match(sm, key1, &sm1, 1)) + if (snat_static_mapping_match(sm, key1, &sm1, 1, 0)) { b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; /* @@ -712,7 +1024,7 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Create session initiated by host from external network */ s1 = create_session_for_static_mapping(sm, b1, sm1, key1, node, - cpu_index); + thread_index); if (!s1) { b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; @@ -721,7 +1033,7 @@ snat_out2in_node_fn (vlib_main_t * vm, } } else - s1 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions, + s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, value1.value); old_addr1 = ip1->dst_address.as_u32; @@ -737,9 +1049,9 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP)) { - old_port1 = tcp1->ports.dst; - tcp1->ports.dst = s1->in2out.port; - new_port1 = tcp1->ports.dst; + old_port1 = tcp1->dst_port; + tcp1->dst_port = s1->in2out.port; + new_port1 = tcp1->dst_port; sum1 = tcp1->checksum; sum1 = ip_csum_update (sum1, old_addr1, new_addr1, @@ -765,9 +1077,9 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Per-user LRU list maintenance for dynamic translation */ if (!snat_is_session_static (s1)) { - clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, s1->per_user_index); - clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, s1->per_user_list_head_index, s1->per_user_index); } @@ -782,7 +1094,7 @@ snat_out2in_node_fn (vlib_main_t * vm, t->next_index = next1; t->session_index = ~0; if (s1) - t->session_index = s1 - sm->per_thread_data[cpu_index].sessions; + t->session_index = s1 - sm->per_thread_data[thread_index].sessions; } pkts_processed += next1 != SNAT_OUT2IN_NEXT_DROP; @@ -822,6 +1134,8 @@ snat_out2in_node_fn (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); udp0 = ip4_next_header (ip0); tcp0 = (tcp_header_t *) udp0; @@ -834,7 +1148,11 @@ snat_out2in_node_fn (vlib_main_t * vm, proto0 = ip_proto_to_snat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == ~0)) + { + snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, + thread_index, now, vm); goto trace00; + } if (PREDICT_FALSE(ip0->ttl == 1)) { @@ -850,7 +1168,7 @@ snat_out2in_node_fn (vlib_main_t * vm, { next0 = icmp_out2in_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, cpu_index, &s0); + next0, now, thread_index, &s0); goto trace00; } @@ -865,7 +1183,7 @@ snat_out2in_node_fn (vlib_main_t * vm, { /* Try to match static mapping by external address and port, destination address and port in packet */ - if (snat_static_mapping_match(sm, key0, &sm0, 1)) + if (snat_static_mapping_match(sm, key0, &sm0, 1, 0)) { b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; /* @@ -882,7 +1200,7 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Create session initiated by host from external network */ s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node, - cpu_index); + thread_index); if (!s0) { b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; @@ -891,7 +1209,7 @@ snat_out2in_node_fn (vlib_main_t * vm, } } else - s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions, + s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, value0.value); old_addr0 = ip0->dst_address.as_u32; @@ -907,9 +1225,9 @@ snat_out2in_node_fn (vlib_main_t * vm, if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->ports.dst; - tcp0->ports.dst = s0->in2out.port; - new_port0 = tcp0->ports.dst; + old_port0 = tcp0->dst_port; + tcp0->dst_port = s0->in2out.port; + new_port0 = tcp0->dst_port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, @@ -935,9 +1253,9 @@ snat_out2in_node_fn (vlib_main_t * vm, /* Per-user LRU list maintenance for dynamic translation */ if (!snat_is_session_static (s0)) { - clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool, + clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, s0->per_user_list_head_index, s0->per_user_index); } @@ -952,7 +1270,7 @@ snat_out2in_node_fn (vlib_main_t * vm, t->next_index = next0; t->session_index = ~0; if (s0) - t->session_index = s0 - sm->per_thread_data[cpu_index].sessions; + t->session_index = s0 - sm->per_thread_data[thread_index].sessions; } pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; @@ -995,106 +1313,692 @@ VLIB_REGISTER_NODE (snat_out2in_node) = { }; VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_node, snat_out2in_node_fn); +/**************************/ +/*** deterministic mode ***/ +/**************************/ static uword -snat_out2in_worker_handoff_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +snat_det_out2in_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - snat_main_t *sm = &snat_main; - vlib_thread_main_t *tm = vlib_get_thread_main (); - u32 n_left_from, *from, *to_next = 0; - static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index; - static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index - = 0; - vlib_frame_queue_elt_t *hf = 0; - vlib_frame_t *f = 0; - int i; - u32 n_left_to_next_worker = 0, *to_next_worker = 0; - u32 next_worker_index = 0; - u32 current_worker_index = ~0; - u32 cpu_index = os_get_cpu_number (); - - ASSERT (vec_len (sm->workers)); - - if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0)) - { - vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1); - - vec_validate_init_empty (congested_handoff_queue_by_worker_index, - sm->first_worker_index + sm->num_workers - 1, - (vlib_frame_queue_t *) (~0)); - } + u32 n_left_from, * from, * to_next; + snat_out2in_next_t next_index; + u32 pkts_processed = 0; + snat_main_t * sm = &snat_main; + u32 thread_index = vlib_get_thread_index (); from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; + next_index = node->cached_next_index; while (n_left_from > 0) { - u32 bi0; - vlib_buffer_t *b0; - u32 sw_if_index0; - u32 rx_fib_index0; - ip4_header_t * ip0; - udp_header_t * udp0; - snat_worker_key_t key0; - clib_bihash_kv_8_8_t kv0, value0; - u8 do_handoff; - - bi0 = from[0]; - from += 1; - n_left_from -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.fib_index = rx_fib_index0; - - if (PREDICT_FALSE(ip0->protocol == IP_PROTOCOL_ICMP)) - { - icmp46_header_t * icmp0 = (icmp46_header_t *) udp0; - icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1); - key0.port = echo0->identifier; - } + u32 n_left_to_next; - kv0.key = key0.as_u64; + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); - /* Ever heard of of the "user" before? */ - if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0)) + while (n_left_from >= 4 && n_left_to_next >= 2) { - key0.port = 0; - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0)) - { - /* No, assign next available worker (RR) */ - next_worker_index = sm->first_worker_index; - if (vec_len (sm->workers)) - { - next_worker_index += - sm->workers[sm->next_worker++ % _vec_len (sm->workers)]; - } + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0, sw_if_index1; + ip4_header_t * ip0, * ip1; + ip_csum_t sum0, sum1; + ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1; + u16 new_port0, old_port0, old_port1, new_port1; + udp_header_t * udp0, * udp1; + tcp_header_t * tcp0, * tcp1; + u32 proto0, proto1; + snat_det_out_key_t key0, key1; + snat_det_map_t * dm0, * dm1; + snat_det_session_t * ses0 = 0, * ses1 = 0; + u32 rx_fib_index0, rx_fib_index1; + icmp46_header_t * icmp0, * icmp1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace0; + } + + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP)) + { + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); + icmp0 = (icmp46_header_t *) udp0; + + next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, thread_index, + &ses0, &dm0); + goto trace0; + } + + key0.ext_host_addr = ip0->src_address; + key0.ext_host_port = tcp0->src; + key0.out_port = tcp0->dst; + + dm0 = snat_det_map_by_out(sm, &ip0->dst_address); + if (PREDICT_FALSE(!dm0)) + { + clib_warning("unknown dst address: %U", + format_ip4_address, &ip0->dst_address); + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace0; + } + + snat_det_reverse(dm0, &ip0->dst_address, + clib_net_to_host_u16(tcp0->dst), &new_addr0); + + ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64); + if (PREDICT_FALSE(!ses0)) + { + clib_warning("no match src %U:%d dst %U:%d for user %U", + format_ip4_address, &ip0->src_address, + clib_net_to_host_u16 (tcp0->src), + format_ip4_address, &ip0->dst_address, + clib_net_to_host_u16 (tcp0->dst), + format_ip4_address, &new_addr0); + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace0; + } + new_port0 = ses0->in_port; + + old_addr0 = ip0->dst_address; + ip0->dst_address = new_addr0; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index; + + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, + ip4_header_t, + dst_address /* changed member */); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) + { + if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED) + ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT; + else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_LAST_ACK) + snat_det_ses_close(dm0, ses0); + + old_port0 = tcp0->dst; + tcp0->dst = new_port0; + + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, + ip4_header_t, + dst_address /* changed member */); + + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */, + length /* changed member */); + tcp0->checksum = ip_csum_fold(sum0); + } + else + { + old_port0 = udp0->dst_port; + udp0->dst_port = new_port0; + udp0->checksum = 0; + } + + trace0: + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (ses0) + t->session_index = ses0 - dm0->sessions; + } + + pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; + + b1 = vlib_get_buffer (vm, bi1); + + ip1 = vlib_buffer_get_current (b1); + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + + sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + + if (PREDICT_FALSE(ip1->ttl == 1)) + { + vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace1; + } + + proto1 = ip_proto_to_snat_proto (ip1->protocol); + + if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP)) + { + rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1); + icmp1 = (icmp46_header_t *) udp1; + + next1 = icmp_out2in(sm, b1, ip1, icmp1, sw_if_index1, + rx_fib_index1, node, next1, thread_index, + &ses1, &dm1); + goto trace1; + } + + key1.ext_host_addr = ip1->src_address; + key1.ext_host_port = tcp1->src; + key1.out_port = tcp1->dst; + + dm1 = snat_det_map_by_out(sm, &ip1->dst_address); + if (PREDICT_FALSE(!dm1)) + { + clib_warning("unknown dst address: %U", + format_ip4_address, &ip1->dst_address); + next1 = SNAT_OUT2IN_NEXT_DROP; + b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace1; + } + + snat_det_reverse(dm1, &ip1->dst_address, + clib_net_to_host_u16(tcp1->dst), &new_addr1); + + ses1 = snat_det_get_ses_by_out (dm1, &new_addr1, key1.as_u64); + if (PREDICT_FALSE(!ses1)) + { + clib_warning("no match src %U:%d dst %U:%d for user %U", + format_ip4_address, &ip1->src_address, + clib_net_to_host_u16 (tcp1->src), + format_ip4_address, &ip1->dst_address, + clib_net_to_host_u16 (tcp1->dst), + format_ip4_address, &new_addr1); + next1 = SNAT_OUT2IN_NEXT_DROP; + b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace1; + } + new_port1 = ses1->in_port; + + old_addr1 = ip1->dst_address; + ip1->dst_address = new_addr1; + vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->inside_fib_index; + + sum1 = ip1->checksum; + sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32, + ip4_header_t, + dst_address /* changed member */); + ip1->checksum = ip_csum_fold (sum1); + + if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP)) + { + if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED) + ses1->state = SNAT_SESSION_TCP_CLOSE_WAIT; + else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_LAST_ACK) + snat_det_ses_close(dm1, ses1); + + old_port1 = tcp1->dst; + tcp1->dst = new_port1; + + sum1 = tcp1->checksum; + sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32, + ip4_header_t, + dst_address /* changed member */); + + sum1 = ip_csum_update (sum1, old_port1, new_port1, + ip4_header_t /* cheat */, + length /* changed member */); + tcp1->checksum = ip_csum_fold(sum1); + } + else + { + old_port1 = udp1->dst_port; + udp1->dst_port = new_port1; + udp1->checksum = 0; + } + + trace1: + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b1->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + t->session_index = ~0; + if (ses1) + t->session_index = ses1 - dm1->sessions; + } + + pkts_processed += next1 != SNAT_OUT2IN_NEXT_DROP; + + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0; + ip4_header_t * ip0; + ip_csum_t sum0; + ip4_address_t new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t * udp0; + tcp_header_t * tcp0; + u32 proto0; + snat_det_out_key_t key0; + snat_det_map_t * dm0; + snat_det_session_t * ses0 = 0; + u32 rx_fib_index0; + icmp46_header_t * icmp0; + + /* 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); + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } + + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP)) + { + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); + icmp0 = (icmp46_header_t *) udp0; + + next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, thread_index, + &ses0, &dm0); + goto trace00; + } + + key0.ext_host_addr = ip0->src_address; + key0.ext_host_port = tcp0->src; + key0.out_port = tcp0->dst; + + dm0 = snat_det_map_by_out(sm, &ip0->dst_address); + if (PREDICT_FALSE(!dm0)) + { + clib_warning("unknown dst address: %U", + format_ip4_address, &ip0->dst_address); + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace00; + } + + snat_det_reverse(dm0, &ip0->dst_address, + clib_net_to_host_u16(tcp0->dst), &new_addr0); + + ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64); + if (PREDICT_FALSE(!ses0)) + { + clib_warning("no match src %U:%d dst %U:%d for user %U", + format_ip4_address, &ip0->src_address, + clib_net_to_host_u16 (tcp0->src), + format_ip4_address, &ip0->dst_address, + clib_net_to_host_u16 (tcp0->dst), + format_ip4_address, &new_addr0); + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace00; + } + new_port0 = ses0->in_port; + + old_addr0 = ip0->dst_address; + ip0->dst_address = new_addr0; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index; + + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, + ip4_header_t, + dst_address /* changed member */); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) + { + if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED) + ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT; + else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_LAST_ACK) + snat_det_ses_close(dm0, ses0); + + old_port0 = tcp0->dst; + tcp0->dst = new_port0; + + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, + ip4_header_t, + dst_address /* changed member */); + + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */, + length /* changed member */); + tcp0->checksum = ip_csum_fold(sum0); } else { - /* Static mapping without port */ - next_worker_index = value0.value; + old_port0 = udp0->dst_port; + udp0->dst_port = new_port0; + udp0->checksum = 0; + } + + trace00: + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (ses0) + t->session_index = ses0 - dm0->sessions; } - /* Add to translated packets worker lookup */ - kv0.value = next_worker_index; - clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv0, 1); + pkts_processed += next0 != SNAT_OUT2IN_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); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_node_increment_counter (vm, snat_det_out2in_node.index, + SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, + pkts_processed); + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (snat_det_out2in_node) = { + .function = snat_det_out2in_node_fn, + .name = "snat-det-out2in", + .vector_size = sizeof (u32), + .format_trace = format_snat_out2in_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(snat_out2in_error_strings), + .error_strings = snat_out2in_error_strings, + + .runtime_data_bytes = sizeof (snat_runtime_t), + + .n_next_nodes = SNAT_OUT2IN_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [SNAT_OUT2IN_NEXT_DROP] = "error-drop", + [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", + [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", + }, +}; +VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn); + +/** + * Get address and port values to be used for packet SNAT translation + * and create session if needed + * + * @param[in,out] sm SNAT main + * @param[in,out] node SNAT node runtime + * @param[in] thread_index thread index + * @param[in,out] b0 buffer containing packet to be translated + * @param[out] p_proto protocol used for matching + * @param[out] p_value address and port after NAT translation + * @param[out] p_dont_translate if packet should not be translated + * @param d optional parameter + * @param e optional parameter + */ +u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node, + u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, + snat_session_key_t *p_value, + u8 *p_dont_translate, void *d, void *e) +{ + ip4_header_t *ip0; + icmp46_header_t *icmp0; + u32 sw_if_index0; + u8 protocol; + snat_det_out_key_t key0; + u8 dont_translate = 0; + u32 next0 = ~0; + icmp_echo_header_t *echo0, *inner_echo0 = 0; + ip4_header_t *inner_ip0; + void *l4_header = 0; + icmp46_header_t *inner_icmp0; + snat_det_map_t * dm0 = 0; + ip4_address_t new_addr0 = {{0}}; + snat_det_session_t * ses0 = 0; + ip4_address_t out_addr; + + ip0 = vlib_buffer_get_current (b0); + icmp0 = (icmp46_header_t *) ip4_next_header (ip0); + echo0 = (icmp_echo_header_t *)(icmp0+1); + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + if (!icmp_is_error_message (icmp0)) + { + protocol = SNAT_PROTOCOL_ICMP; + key0.ext_host_addr = ip0->src_address; + key0.ext_host_port = 0; + key0.out_port = echo0->identifier; + out_addr = ip0->dst_address; + } + else + { + inner_ip0 = (ip4_header_t *)(echo0+1); + l4_header = ip4_next_header (inner_ip0); + protocol = ip_proto_to_snat_proto (inner_ip0->protocol); + key0.ext_host_addr = inner_ip0->dst_address; + out_addr = inner_ip0->src_address; + switch (protocol) + { + case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t*)l4_header; + inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); + key0.ext_host_port = 0; + key0.out_port = inner_echo0->identifier; + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + key0.ext_host_port = ((tcp_udp_header_t*)l4_header)->dst_port; + key0.out_port = ((tcp_udp_header_t*)l4_header)->src_port; + break; + default: + b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + } + + dm0 = snat_det_map_by_out(sm, &out_addr); + if (PREDICT_FALSE(!dm0)) + { + /* Don't NAT packet aimed at the intfc address */ + if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0, + ip0->dst_address.as_u32))) + { + dont_translate = 1; + goto out; } - else - next_worker_index = value0.value; + clib_warning("unknown dst address: %U", + format_ip4_address, &ip0->dst_address); + goto out; + } - if (PREDICT_FALSE (next_worker_index != cpu_index)) + snat_det_reverse(dm0, &ip0->dst_address, + clib_net_to_host_u16(key0.out_port), &new_addr0); + + ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64); + if (PREDICT_FALSE(!ses0)) + { + /* Don't NAT packet aimed at the intfc address */ + if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0, + ip0->dst_address.as_u32))) + { + dont_translate = 1; + goto out; + } + clib_warning("no match src %U:%d dst %U:%d for user %U", + format_ip4_address, &key0.ext_host_addr, + clib_net_to_host_u16 (key0.ext_host_port), + format_ip4_address, &out_addr, + clib_net_to_host_u16 (key0.out_port), + format_ip4_address, &new_addr0); + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + + if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && + !icmp_is_error_message (icmp0))) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + + goto out; + +out: + *p_proto = protocol; + if (ses0) + { + p_value->addr = new_addr0; + p_value->fib_index = sm->inside_fib_index; + p_value->port = ses0->in_port; + } + *p_dont_translate = dont_translate; + if (d) + *(snat_det_session_t**)d = ses0; + if (e) + *(snat_det_map_t**)e = dm0; + return next0; +} + +/**********************/ +/*** worker handoff ***/ +/**********************/ +static uword +snat_out2in_worker_handoff_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + snat_main_t *sm = &snat_main; + vlib_thread_main_t *tm = vlib_get_thread_main (); + u32 n_left_from, *from, *to_next = 0; + static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index; + static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index + = 0; + vlib_frame_queue_elt_t *hf = 0; + vlib_frame_t *f = 0; + int i; + u32 n_left_to_next_worker = 0, *to_next_worker = 0; + u32 next_worker_index = 0; + u32 current_worker_index = ~0; + u32 thread_index = vlib_get_thread_index (); + + ASSERT (vec_len (sm->workers)); + + if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0)) + { + vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1); + + vec_validate_init_empty (congested_handoff_queue_by_worker_index, + sm->first_worker_index + sm->num_workers - 1, + (vlib_frame_queue_t *) (~0)); + } + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + + while (n_left_from > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 sw_if_index0; + u32 rx_fib_index0; + ip4_header_t * ip0; + u8 do_handoff; + + bi0 = from[0]; + from += 1; + n_left_from -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); + + ip0 = vlib_buffer_get_current (b0); + + next_worker_index = sm->worker_out2in_cb(ip0, rx_fib_index0); + + if (PREDICT_FALSE (next_worker_index != thread_index)) { do_handoff = 1; @@ -1132,7 +2036,7 @@ snat_out2in_worker_handoff_fn (vlib_main_t * vm, /* if this is 1st frame */ if (!f) { - f = vlib_get_frame_to_node (vm, snat_out2in_node.index); + f = vlib_get_frame_to_node (vm, sm->out2in_node_index); to_next = vlib_frame_vector_args (f); } @@ -1152,7 +2056,7 @@ snat_out2in_worker_handoff_fn (vlib_main_t * vm, } if (f) - vlib_put_frame_to_node (vm, snat_out2in_node.index, f); + vlib_put_frame_to_node (vm, sm->out2in_node_index, f); if (hf) hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; @@ -1199,80 +2103,6 @@ VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = { VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node, snat_out2in_worker_handoff_fn); -static inline u32 icmp_out2in_fast (snat_main_t *sm, - vlib_buffer_t * b0, - ip4_header_t * ip0, - icmp46_header_t * icmp0, - u32 sw_if_index0, - vlib_node_runtime_t * node, - u32 next0, - u32 rx_fib_index0) -{ - snat_session_key_t key0, sm0; - icmp_echo_header_t *echo0; - u32 new_addr0, old_addr0; - u16 old_id0, new_id0; - ip_csum_t sum0; - snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data; - - echo0 = (icmp_echo_header_t *)(icmp0+1); - - key0.addr = ip0->dst_address; - key0.port = echo0->identifier; - key0.fib_index = rx_fib_index0; - - if (snat_static_mapping_match(sm, key0, &sm0, 1)) - { - ip4_address_t * first_int_addr; - - if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0)) - { - first_int_addr = - ip4_interface_first_address (sm->ip4_main, sw_if_index0, - 0 /* just want the address */); - rt->cached_sw_if_index = sw_if_index0; - if (first_int_addr) - rt->cached_ip4_address = first_int_addr->as_u32; - else - rt->cached_ip4_address = 0; - } - - /* Don't NAT packet aimed at the intfc address */ - if (PREDICT_FALSE(ip0->dst_address.as_u32 == - rt->cached_ip4_address)) - return next0; - - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - return SNAT_OUT2IN_NEXT_DROP; - } - - new_addr0 = sm0.addr.as_u32; - new_id0 = sm0.port; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; - - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address.as_u32 = new_addr0; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_FALSE(new_id0 != echo0->identifier)) - { - old_id0 = echo0->identifier; - echo0->identifier = new_id0; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier); - icmp0->checksum = ip_csum_fold (sum0); - } - - return next0; -} - static uword snat_out2in_fast_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -1331,6 +2161,16 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, vnet_feature_next (sw_if_index0, &next0, b0); + if (PREDICT_FALSE(ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } + proto0 = ip_proto_to_snat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == ~0)) @@ -1338,8 +2178,8 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) { - next0 = icmp_out2in_fast - (sm, b0, ip0, icmp0, sw_if_index0, node, next0, rx_fib_index0); + next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, ~0, 0, 0); goto trace00; } @@ -1347,7 +2187,7 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, key0.port = udp0->dst_port; key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, key0, &sm0, 1)) + if (snat_static_mapping_match(sm, key0, &sm0, 1, 0)) { b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; goto trace00; @@ -1369,8 +2209,8 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, { if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->ports.dst; - tcp0->ports.dst = new_port0; + old_port0 = tcp0->dst_port; + tcp0->dst_port = new_port0; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0,