diff options
Diffstat (limited to 'src/plugins/nat/out2in.c')
| -rwxr-xr-x | src/plugins/nat/out2in.c | 4713 |
1 files changed, 1067 insertions, 3646 deletions
diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c index ba343ad72a5..985333fc765 100755 --- a/src/plugins/nat/out2in.c +++ b/src/plugins/nat/out2in.c @@ -12,11 +12,14 @@ * See the License for the specific language governing permissions and * limitations under the License. */ +/** + * @file + * @brief NAT44 endpoint-dependent outside to inside network translation + */ #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vnet/pg/pg.h> -#include <vnet/handoff.h> #include <vnet/ip/ip.h> #include <vnet/udp/udp.h> @@ -24,7 +27,6 @@ #include <vnet/fib/ip4_fib.h> #include <nat/nat.h> #include <nat/nat_ipfix_logging.h> -#include <nat/nat_det.h> #include <nat/nat_reass.h> #include <nat/nat_inlines.h> @@ -32,81 +34,43 @@ #include <vppinfra/error.h> #include <vppinfra/elog.h> -typedef struct { +typedef struct +{ u32 sw_if_index; u32 next_index; u32 session_index; } snat_out2in_trace_t; -typedef struct { - u32 next_worker_index; - u8 do_handoff; -} snat_out2in_worker_handoff_trace_t; - /* packet trace format function */ -static u8 * format_snat_out2in_trace (u8 * s, va_list * args) +static u8 * +format_snat_out2in_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 *); - snat_out2in_trace_t * t = va_arg (*args, snat_out2in_trace_t *); + snat_out2in_trace_t *t = va_arg (*args, snat_out2in_trace_t *); - s = format (s, "NAT44_OUT2IN: sw_if_index %d, next index %d, session index %d", - t->sw_if_index, t->next_index, t->session_index); + s = + format (s, + "NAT44_OUT2IN: sw_if_index %d, next index %d, session index %d", + t->sw_if_index, t->next_index, t->session_index); return s; } -static u8 * format_snat_out2in_fast_trace (u8 * s, va_list * args) +static u8 * +format_snat_out2in_fast_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 *); - snat_out2in_trace_t * t = va_arg (*args, snat_out2in_trace_t *); + snat_out2in_trace_t *t = va_arg (*args, snat_out2in_trace_t *); s = format (s, "NAT44_OUT2IN_FAST: sw_if_index %d, next index %d", - t->sw_if_index, t->next_index); - return s; -} - -static u8 * format_snat_out2in_worker_handoff_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 *); - snat_out2in_worker_handoff_trace_t * t = - va_arg (*args, snat_out2in_worker_handoff_trace_t *); - char * m; - - m = t->do_handoff ? "next worker" : "same worker"; - s = format (s, "NAT44_OUT2IN_WORKER_HANDOFF: %s %d", m, t->next_worker_index); - - return s; -} - -typedef struct { - u32 sw_if_index; - u32 next_index; - u8 cached; -} nat44_out2in_reass_trace_t; - -static u8 * format_nat44_out2in_reass_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 *); - nat44_out2in_reass_trace_t * t = va_arg (*args, nat44_out2in_reass_trace_t *); - - s = format (s, "NAT44_OUT2IN_REASS: sw_if_index %d, next index %d, status %s", - t->sw_if_index, t->next_index, - t->cached ? "cached" : "translated"); - + t->sw_if_index, t->next_index); return s; } 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; vlib_node_registration_t nat44_out2in_reass_node; -vlib_node_registration_t nat44_ed_out2in_node; -vlib_node_registration_t nat44_ed_out2in_slowpath_node; -vlib_node_registration_t nat44_ed_out2in_reass_node; #define foreach_snat_out2in_error \ _(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ @@ -117,23 +81,24 @@ _(NO_TRANSLATION, "No translation") \ _(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \ _(DROP_FRAGMENT, "Drop fragment") \ _(MAX_REASS, "Maximum reassemblies exceeded") \ -_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\ -_(FQ_CONGESTED, "Handoff frame queue congested") +_(MAX_FRAG, "Maximum fragments per reassembly exceeded") -typedef enum { +typedef enum +{ #define _(sym,str) SNAT_OUT2IN_ERROR_##sym, foreach_snat_out2in_error #undef _ - SNAT_OUT2IN_N_ERROR, + SNAT_OUT2IN_N_ERROR, } snat_out2in_error_t; -static char * snat_out2in_error_strings[] = { +static char *snat_out2in_error_strings[] = { #define _(sym,string) string, foreach_snat_out2in_error #undef _ }; -typedef enum { +typedef enum +{ SNAT_OUT2IN_NEXT_DROP, SNAT_OUT2IN_NEXT_LOOKUP, SNAT_OUT2IN_NEXT_ICMP_ERROR, @@ -142,34 +107,34 @@ typedef enum { } snat_out2in_next_t; int -nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg) +nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_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; snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, - ctx->thread_index); + ctx->thread_index); clib_bihash_kv_8_8_t s_kv; s = pool_elt_at_index (tsm->sessions, kv->value); - sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s); + sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); if (ctx->now >= sess_timeout_time) { s_kv.key = s->in2out.as_u64; if (clib_bihash_add_del_8_8 (&tsm->in2out, &s_kv, 0)) - nat_log_warn ("out2in key del failed"); + nat_log_warn ("out2in key del failed"); - snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); + snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); if (!snat_is_session_static (s)) - snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in); + snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, + &s->out2in); nat44_delete_session (sm, s, ctx->thread_index); return 1; @@ -193,13 +158,12 @@ nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg) * @returns SNAT session if successfully created otherwise 0. */ static inline snat_session_t * -create_session_for_static_mapping (snat_main_t *sm, - vlib_buffer_t *b0, - snat_session_key_t in2out, - snat_session_key_t out2in, - vlib_node_runtime_t * node, - u32 thread_index, - f64 now) +create_session_for_static_mapping (snat_main_t * sm, + vlib_buffer_t * b0, + snat_session_key_t in2out, + snat_session_key_t out2in, + vlib_node_runtime_t * node, + u32 thread_index, f64 now) { snat_user_t *u; snat_session_t *s; @@ -208,7 +172,7 @@ create_session_for_static_mapping (snat_main_t *sm, udp_header_t *udp0; nat44_is_idle_session_ctx_t ctx0; - if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) + if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; nat_log_notice ("maximum sessions exceeded"); @@ -218,7 +182,8 @@ create_session_for_static_mapping (snat_main_t *sm, ip0 = vlib_buffer_get_current (b0); udp0 = ip4_next_header (ip0); - u = nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index); + u = + nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index); if (!u) { nat_log_warn ("create NAT user failed"); @@ -233,11 +198,10 @@ create_session_for_static_mapping (snat_main_t *sm, return 0; } - s->outside_address_index = ~0; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; s->ext_host_addr.as_u32 = ip0->src_address.as_u32; s->ext_host_port = udp0->src_port; - user_session_increment (sm, u, 1 /* static */); + user_session_increment (sm, u, 1 /* static */ ); s->in2out = in2out; s->out2in = out2in; s->in2out.protocol = out2in.protocol; @@ -247,31 +211,30 @@ create_session_for_static_mapping (snat_main_t *sm, ctx0.thread_index = thread_index; kv0.key = s->in2out.as_u64; kv0.value = s - sm->per_thread_data[thread_index].sessions; - if (clib_bihash_add_or_overwrite_stale_8_8 ( - &sm->per_thread_data[thread_index].in2out, &kv0, + if (clib_bihash_add_or_overwrite_stale_8_8 + (&sm->per_thread_data[thread_index].in2out, &kv0, nat44_i2o_is_idle_session_cb, &ctx0)) - nat_log_notice ("in2out key add failed"); + nat_log_notice ("in2out key add failed"); kv0.key = s->out2in.as_u64; - if (clib_bihash_add_or_overwrite_stale_8_8 ( - &sm->per_thread_data[thread_index].out2in, &kv0, - nat44_o2i_is_idle_session_cb, &ctx0)) - nat_log_notice ("out2in key add failed"); + if (clib_bihash_add_or_overwrite_stale_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv0, + nat44_o2i_is_idle_session_cb, &ctx0)) + nat_log_notice ("out2in key add failed"); /* log NAT event */ - snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); + snat_ipfix_logging_nat44_ses_create (s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, s->in2out.fib_index); return s; } static_always_inline -snat_out2in_error_t icmp_get_key(ip4_header_t *ip0, - snat_session_key_t *p_key0) + snat_out2in_error_t icmp_get_key (ip4_header_t * ip0, + snat_session_key_t * p_key0) { icmp46_header_t *icmp0; snat_session_key_t key0; @@ -281,7 +244,7 @@ snat_out2in_error_t icmp_get_key(ip4_header_t *ip0, icmp46_header_t *inner_icmp0; icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - echo0 = (icmp_echo_header_t *)(icmp0+1); + echo0 = (icmp_echo_header_t *) (icmp0 + 1); if (!icmp_is_error_message (icmp0)) { @@ -291,27 +254,27 @@ snat_out2in_error_t icmp_get_key(ip4_header_t *ip0, } else { - inner_ip0 = (ip4_header_t *)(echo0+1); + 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: - inner_icmp0 = (icmp46_header_t*)l4_header; - inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); - key0.port = inner_echo0->identifier; - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - key0.port = ((tcp_udp_header_t*)l4_header)->src_port; - break; - default: - return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL; - } + { + case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t *) l4_header; + inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); + key0.port = inner_echo0->identifier; + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + key0.port = ((tcp_udp_header_t *) l4_header)->src_port; + break; + default: + return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL; + } } *p_key0 = key0; - return -1; /* success */ + return -1; /* success */ } /** @@ -328,11 +291,12 @@ snat_out2in_error_t icmp_get_key(ip4_header_t *ip0, * @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, - ip4_header_t *ip0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) +u32 +icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, + u32 thread_index, vlib_buffer_t * b0, + ip4_header_t * ip0, u8 * p_proto, + snat_session_key_t * p_value, + u8 * p_dont_translate, void *d, void *e) { icmp46_header_t *icmp0; u32 sw_if_index0; @@ -347,7 +311,7 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node, int err; icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + 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; @@ -364,64 +328,66 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node, kv0.key = key0.as_u64; if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, - &value0)) + &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, &is_addr_only, 0, 0, 0)) - { - if (!sm->forwarding_enabled) - { - /* 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; - } - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - goto out; - } - else - { - dont_translate = 1; - goto out; - } - } - - 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; - } + if (snat_static_mapping_match + (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0)) + { + if (!sm->forwarding_enabled) + { + /* 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; + } + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } + else + { + dont_translate = 1; + goto out; + } + } + + 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, thread_index, - vlib_time_now (sm->vlib_main)); + s0 = create_session_for_static_mapping (sm, b0, sm0, key0, + node, thread_index, + vlib_time_now (sm->vlib_main)); if (!s0) - { - next0 = SNAT_OUT2IN_NEXT_DROP; - goto out; - } + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } } else { - 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; - } + 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); + value0.value); } out: @@ -430,7 +396,7 @@ out: *p_value = s0->in2out; *p_dont_translate = dont_translate; if (d) - *(snat_session_t**)d = s0; + *(snat_session_t **) d = s0; return next0; } @@ -447,11 +413,12 @@ out: * @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, - ip4_header_t *ip0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) +u32 +icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node, + u32 thread_index, vlib_buffer_t * b0, + ip4_header_t * ip0, u8 * p_proto, + snat_session_key_t * p_value, + u8 * p_dont_translate, void *d, void *e) { icmp46_header_t *icmp0; u32 sw_if_index0; @@ -464,7 +431,7 @@ u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node, int err; icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + 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); @@ -476,22 +443,22 @@ u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node, } key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0)) + if (snat_static_mapping_match (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0)) { /* 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; - } + 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 && - (icmp0->type != ICMP4_echo_request || !is_addr_only) && - !icmp_is_error_message (icmp0))) + 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; @@ -506,17 +473,15 @@ out2: 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) +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; @@ -531,10 +496,11 @@ static inline u32 icmp_out2in (snat_main_t *sm, u16 checksum0; u32 next0_tmp; - echo0 = (icmp_echo_header_t *)(icmp0+1); + echo0 = (icmp_echo_header_t *) (icmp0 + 1); - next0_tmp = sm->icmp_match_out2in_cb(sm, node, thread_index, b0, ip0, - &protocol, &sm0, &dont_translate, d, e); + next0_tmp = sm->icmp_match_out2in_cb (sm, node, thread_index, b0, ip0, + &protocol, &sm0, &dont_translate, d, + e); if (next0_tmp != ~0) next0 = next0_tmp; if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate) @@ -543,22 +509,23 @@ static inline u32 icmp_out2in (snat_main_t *sm, if (PREDICT_TRUE (!ip4_is_fragment (ip0))) { sum0 = ip_incremental_checksum (0, icmp0, - ntohs(ip0->length) - ip4_header_bytes (ip0)); + ntohs (ip0->length) - + ip4_header_bytes (ip0)); checksum0 = ~ip_csum_fold (sum0); if (checksum0 != 0 && checksum0 != 0xffff) - { - next0 = SNAT_OUT2IN_NEXT_DROP; - goto out; - } + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } } old_addr0 = ip0->dst_address.as_u32; new_addr0 = ip0->dst_address.as_u32 = sm0.addr.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; + 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 */); + dst_address /* changed member */ ); ip0->checksum = ip_csum_fold (sum0); if (icmp0->checksum == 0) @@ -567,28 +534,28 @@ static inline u32 icmp_out2in (snat_main_t *sm, if (!icmp_is_error_message (icmp0)) { 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); - } + 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); + } } else { - inner_ip0 = (ip4_header_t *)(echo0+1); + 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; - goto out; - } + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } old_addr0 = inner_ip0->src_address.as_u32; inner_ip0->src_address = sm0.addr; @@ -596,38 +563,38 @@ static inline u32 icmp_out2in (snat_main_t *sm, sum0 = icmp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address /* changed member */); + src_address /* changed member */ ); icmp0->checksum = ip_csum_fold (sum0); 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 = sm0.port; - inner_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); - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - old_id0 = ((tcp_udp_header_t*)l4_header)->src_port; - new_id0 = sm0.port; - ((tcp_udp_header_t*)l4_header)->src_port = new_id0; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, - src_port); - icmp0->checksum = ip_csum_fold (sum0); - break; - default: - ASSERT(0); - } + { + 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 = sm0.port; + inner_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); + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + old_id0 = ((tcp_udp_header_t *) l4_header)->src_port; + new_id0 = sm0.port; + ((tcp_udp_header_t *) l4_header)->src_port = new_id0; + + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, + src_port); + icmp0->checksum = ip_csum_fold (sum0); + break; + default: + ASSERT (0); + } } out: @@ -635,25 +602,26 @@ out: } -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) +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)) + 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)) { /* Accounting */ nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (sm->vlib_main, b0)); + vlib_buffer_length_in_chain + (sm->vlib_main, b0)); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); } @@ -661,10 +629,9 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm, } static int -nat_out2in_sm_unknown_proto (snat_main_t *sm, - vlib_buffer_t * b, - ip4_header_t * ip, - u32 rx_fib_index) +nat_out2in_sm_unknown_proto (snat_main_t * sm, + vlib_buffer_t * b, + ip4_header_t * ip, u32 rx_fib_index) { clib_bihash_kv_8_8_t kv, value; snat_static_mapping_t *m; @@ -688,19 +655,18 @@ nat_out2in_sm_unknown_proto (snat_main_t *sm, 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] = m->fib_index; + vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index; return 0; } static uword snat_out2in_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) + vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, *from, *to_next; snat_out2in_next_t next_index; u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; + snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; @@ -712,34 +678,33 @@ snat_out2in_node_fn (vlib_main_t * vm, { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { - 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; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - u32 new_addr1, old_addr1; - u16 new_port1, old_port1; - udp_header_t * udp0, * udp1; - tcp_header_t * tcp0, * tcp1; - icmp46_header_t * icmp0, * icmp1; - snat_session_key_t key0, key1, sm0, sm1; - u32 rx_fib_index0, rx_fib_index1; - u32 proto0, proto1; - snat_session_t * s0 = 0, * s1 = 0; - clib_bihash_kv_8_8_t kv0, kv1, value0, value1; + 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; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + u32 new_addr1, old_addr1; + u16 new_port1, old_port1; + udp_header_t *udp0, *udp1; + tcp_header_t *tcp0, *tcp1; + icmp46_header_t *icmp0, *icmp1; + snat_session_key_t key0, key1, sm0, sm1; + u32 rx_fib_index0, rx_fib_index1; + u32 proto0, proto1; + snat_session_t *s0 = 0, *s1 = 0; + clib_bihash_kv_8_8_t kv0, kv1, value0, value1; /* Prefetch next iteration. */ { - vlib_buffer_t * p2, * p3; + vlib_buffer_t *p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); @@ -751,7 +716,7 @@ snat_out2in_node_fn (vlib_main_t * vm, CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); } - /* speculatively enqueue b0 and b1 to the current next frame */ + /* speculatively enqueue b0 and b1 to the current next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; @@ -762,336 +727,348 @@ 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; + 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; - icmp0 = (icmp46_header_t *) udp0; + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); - - 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 == ~0)) - { - if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0)) - { - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - } - 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, thread_index, &s0); - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip0))) - { - next0 = SNAT_OUT2IN_NEXT_REASS; - goto trace0; - } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; - - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].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, 0, 0, 0, 0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ + sw_if_index0); + + 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 == ~0)) + { + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + { + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; + } + } + 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, thread_index, &s0); + goto trace0; + } + + if (PREDICT_FALSE (ip4_is_fragment (ip0))) + { + next0 = SNAT_OUT2IN_NEXT_REASS; + goto trace0; + } + + key0.addr = ip0->dst_address; + key0.port = udp0->dst_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; + + kv0.key = key0.as_u64; + + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].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, 0, 0, 0, 0)) + { + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) + && (udp0->dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { vnet_feature_next (&next0, b0); goto trace0; } - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - goto trace0; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node, - thread_index, now); - if (!s0) - { - next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace0; - } - } - else - s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); - - 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; - - 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_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - 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, - 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 = s0->in2out.port; - udp0->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - /* 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))) - { - 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 (s0) - t->session_index = s0 - sm->per_thread_data[thread_index].sessions; - } - - pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; - - - ip1 = vlib_buffer_get_current (b1); - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; - - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + } + goto trace0; + } + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node, + thread_index, now); + if (!s0) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace0; + } + } + else + s0 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); + + 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; + + 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_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + 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, + 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 = s0->in2out.port; + udp0->checksum = 0; + } + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, + b0)); + /* 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))) + { + 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 (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; + } + + pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; + + + ip1 = vlib_buffer_get_current (b1); + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + icmp1 = (icmp46_header_t *) udp1; + + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index1); - - 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 == ~0)) - { - if (nat_out2in_sm_unknown_proto(sm, b1, ip1, rx_fib_index1)) - { - if (!sm->forwarding_enabled) - { - b1->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } - } - goto trace1; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - goto trace1; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip1))) - { - next1 = SNAT_OUT2IN_NEXT_REASS; - goto trace1; - } - - key1.addr = ip1->dst_address; - key1.port = udp1->dst_port; - key1.protocol = proto1; - key1.fib_index = rx_fib_index1; - - kv1.key = key1.as_u64; - - if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, - &kv1, &value1)) - { - /* 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, 0, 0, 0, 0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ + sw_if_index1); + + 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 == ~0)) + { + if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) + { + if (!sm->forwarding_enabled) + { + b1->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next1 = SNAT_OUT2IN_NEXT_DROP; + } + } + goto trace1; + } + + if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) + { + next1 = icmp_out2in_slow_path + (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, + next1, now, thread_index, &s1); + goto trace1; + } + + if (PREDICT_FALSE (ip4_is_fragment (ip1))) + { + next1 = SNAT_OUT2IN_NEXT_REASS; + goto trace1; + } + + key1.addr = ip1->dst_address; + key1.port = udp1->dst_port; + key1.protocol = proto1; + key1.fib_index = rx_fib_index1; + + kv1.key = key1.as_u64; + + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv1, &value1)) + { + /* 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, 0, 0, 0, 0)) + { + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP - && (udp1->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) + && (udp1->dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { vnet_feature_next (&next1, b1); goto trace1; } - if (!sm->forwarding_enabled) - { - b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } - goto trace1; - } - - /* Create session initiated by host from external network */ - s1 = create_session_for_static_mapping(sm, b1, sm1, key1, node, - thread_index, now); - if (!s1) - { - next1 = SNAT_OUT2IN_NEXT_DROP; - goto trace1; - } - } - else - s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value1.value); - - old_addr1 = ip1->dst_address.as_u32; - ip1->dst_address = s1->in2out.addr; - new_addr1 = ip1->dst_address.as_u32; - vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP)) - { - 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, - 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 = s1->in2out.port; - udp1->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, b1)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); - 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 (s1) - t->session_index = s1 - sm->per_thread_data[thread_index].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); - } + if (!sm->forwarding_enabled) + { + b1->error = + node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next1 = SNAT_OUT2IN_NEXT_DROP; + } + goto trace1; + } + + /* Create session initiated by host from external network */ + s1 = create_session_for_static_mapping (sm, b1, sm1, key1, node, + thread_index, now); + if (!s1) + { + next1 = SNAT_OUT2IN_NEXT_DROP; + goto trace1; + } + } + else + s1 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value1.value); + + old_addr1 = ip1->dst_address.as_u32; + ip1->dst_address = s1->in2out.addr; + new_addr1 = ip1->dst_address.as_u32; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; + + sum1 = ip1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + dst_address /* changed member */ ); + ip1->checksum = ip_csum_fold (sum1); + + if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) + { + 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, + 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 = s1->in2out.port; + udp1->checksum = 0; + } + + /* Accounting */ + nat44_session_update_counters (s1, now, + vlib_buffer_length_in_chain (vm, + b1)); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s1, thread_index); + 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 (s1) + t->session_index = + s1 - sm->per_thread_data[thread_index].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; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t * udp0; - tcp_header_t * tcp0; - icmp46_header_t * icmp0; - snat_session_key_t key0, sm0; - u32 rx_fib_index0; - u32 proto0; - snat_session_t * s0 = 0; - clib_bihash_kv_8_8_t kv0, value0; - - /* speculatively enqueue b0 to the current next frame */ + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_key_t key0, sm0; + u32 rx_fib_index0; + u32 proto0; + snat_session_t *s0 = 0; + clib_bihash_kv_8_8_t kv0, value0; + + /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; @@ -1101,159 +1078,165 @@ snat_out2in_node_fn (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); - vnet_buffer (b0)->snat.flags = 0; + vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; 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)) - { - if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0)) - { - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - } - goto trace00; - } - - 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; - } - - 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, thread_index, &s0); - goto trace00; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip0))) - { - next0 = SNAT_OUT2IN_NEXT_REASS; - goto trace00; - } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; - - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].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, 0, 0, 0, 0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ + sw_if_index0); + + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == ~0)) + { + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + { + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; + } + } + goto trace00; + } + + 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; + } + + 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, thread_index, &s0); + goto trace00; + } + + if (PREDICT_FALSE (ip4_is_fragment (ip0))) + { + next0 = SNAT_OUT2IN_NEXT_REASS; + goto trace00; + } + + key0.addr = ip0->dst_address; + key0.port = udp0->dst_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; + + kv0.key = key0.as_u64; + + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].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, 0, 0, 0, 0)) + { + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) + && (udp0->dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { vnet_feature_next (&next0, b0); goto trace00; } - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - goto trace00; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node, - thread_index, now); - if (!s0) - { - next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace00; - } - } - else - s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); - - 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; - - 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_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - 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, - 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 = s0->in2out.port; - udp0->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - 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 (s0) - t->session_index = s0 - sm->per_thread_data[thread_index].sessions; - } - - pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; - - /* verify speculative enqueue, maybe switch current next frame */ + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + } + goto trace00; + } + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node, + thread_index, now); + if (!s0) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace00; + } + } + else + s0 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); + + 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; + + 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_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + 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, + 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 = s0->in2out.port; + udp0->checksum = 0; + } + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, + b0)); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + 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 (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; + } + + 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); @@ -1263,11 +1246,12 @@ snat_out2in_node_fn (vlib_main_t * vm, } vlib_node_increment_counter (vm, snat_out2in_node.index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); + SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, + pkts_processed); return frame->n_vectors; } +/* *INDENT-OFF* */ VLIB_REGISTER_NODE (snat_out2in_node) = { .function = snat_out2in_node_fn, .name = "nat44-out2in", @@ -1290,12 +1274,13 @@ VLIB_REGISTER_NODE (snat_out2in_node) = { [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", }, }; +/* *INDENT-ON* */ + VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_node, snat_out2in_node_fn); static uword nat44_out2in_reass_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) + vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; snat_out2in_next_t next_index; @@ -1319,1383 +1304,22 @@ nat44_out2in_reass_node_fn (vlib_main_t * vm, 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; - vlib_buffer_t *b0; - u32 next0; - u8 cached0 = 0; - ip4_header_t *ip0; - nat_reass_ip4_t *reass0; - udp_header_t * udp0; - tcp_header_t * tcp0; - snat_session_key_t key0, sm0; - clib_bihash_kv_8_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 = SNAT_OUT2IN_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 = SNAT_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT]; - goto trace0; - } - - ip0 = (ip4_header_t *) vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_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 = SNAT_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS]; - nat_log_notice ("maximum reassemblies exceeded"); - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 (&per_thread_data->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, 0, 0, 0, 0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port - == clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - goto trace0; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node, - thread_index, now); - if (!s0) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace0; - } - reass0->sess_index = s0 - per_thread_data->sessions; - reass0->thread_index = thread_index; - } - 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 (PREDICT_FALSE (reass0->sess_index == (u32) ~0)) - { - if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop)) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG]; - nat_log_notice ("maximum fragments per reassembly exceeded"); - next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace0; - } - cached0 = 1; - goto trace0; - } - s0 = pool_elt_at_index (per_thread_data->sessions, - reass0->sess_index); - } - - 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; - - 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 (ip4_is_first_fragment (ip0))) - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - 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, - 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 = s0->in2out.port; - udp0->checksum = 0; - } - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - /* 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_out2in_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--; - } - else - { - 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); - } - - 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 (from, fragments_to_loopback, sizeof (u32) * len); - n_left_from = len; - vec_reset_length (fragments_to_loopback); - } - else - { - clib_memcpy (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, nat44_out2in_reass_node.index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); - - nat_send_all_to_node (vm, fragments_to_drop, node, - &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT], - SNAT_OUT2IN_NEXT_DROP); - - vec_free (fragments_to_drop); - vec_free (fragments_to_loopback); - return frame->n_vectors; -} - -VLIB_REGISTER_NODE (nat44_out2in_reass_node) = { - .function = nat44_out2in_reass_node_fn, - .name = "nat44-out2in-reass", - .vector_size = sizeof (u32), - .format_trace = format_nat44_out2in_reass_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(snat_out2in_error_strings), - .error_strings = snat_out2in_error_strings, - - .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", - [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", - }, -}; -VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node, - nat44_out2in_reass_node_fn); - -/*******************************/ -/*** endpoint-dependent mode ***/ -/*******************************/ -typedef enum { - NAT44_ED_OUT2IN_NEXT_DROP, - NAT44_ED_OUT2IN_NEXT_LOOKUP, - NAT44_ED_OUT2IN_NEXT_ICMP_ERROR, - NAT44_ED_OUT2IN_NEXT_IN2OUT, - NAT44_ED_OUT2IN_NEXT_SLOW_PATH, - NAT44_ED_OUT2IN_NEXT_REASS, - NAT44_ED_OUT2IN_N_NEXT, -} nat44_ed_out2in_next_t; - -typedef struct { - u32 sw_if_index; - u32 next_index; - u32 session_index; - u32 is_slow_path; -} nat44_ed_out2in_trace_t; - -static u8 * -format_nat44_ed_out2in_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 *); - nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *); - char * tag; - - tag = t->is_slow_path ? "NAT44_OUT2IN_SLOW_PATH" : "NAT44_OUT2IN_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; -} - -static inline u32 -icmp_out2in_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_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)) - { - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (sm->vlib_main, b0)); - } - return next0; -} - -int -nat44_o2i_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) - { - ed_key.l_addr = s->in2out.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->in2out.port; - ed_key.r_port = s->ext_host_port; - } - if (is_twice_nat_session (s)) - { - ed_key.r_addr = s->ext_host_nat_addr; - ed_key.r_port = s->ext_host_nat_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->in2out_ed, &ed_kv, 0)) - nat_log_warn ("in2out_ed key del failed"); - - if (snat_is_unk_proto_session (s)) - goto delete; - - snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_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; - - if (s->outside_address_index != ~0) - 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; -} - -static snat_session_t * -create_session_for_static_mapping_ed (snat_main_t * sm, - vlib_buffer_t *b, - snat_session_key_t l_key, - snat_session_key_t e_key, - vlib_node_runtime_t * node, - u32 thread_index, - twice_nat_type_t twice_nat, - lb_nat_type_t lb_nat, - f64 now) -{ - snat_session_t *s; - snat_user_t *u; - ip4_header_t *ip; - udp_header_t *udp; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - clib_bihash_kv_16_8_t kv; - snat_session_key_t eh_key; - u32 address_index; - nat44_is_idle_session_ctx_t ctx; - - if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_log_notice ("maximum sessions exceeded"); - return 0; - } - - u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return 0; - } - - s = nat_ed_session_alloc (sm, u, thread_index); - if (!s) - { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); - return 0; - } - - ip = vlib_buffer_get_current (b); - udp = ip4_next_header (ip); - - s->ext_host_addr.as_u32 = ip->src_address.as_u32; - s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - if (lb_nat) - s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; - if (lb_nat == AFFINITY_LB_NAT) - s->flags |= SNAT_SESSION_FLAG_AFFINITY; - s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->outside_address_index = ~0; - s->out2in = e_key; - s->in2out = l_key; - s->in2out.protocol = s->out2in.protocol; - user_session_increment (sm, u, 1); - - /* Add to lookup tables */ - make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol, - e_key.fib_index, e_key.port, s->ext_host_port); - kv.value = s - tsm->sessions; - ctx.now = now; - ctx.thread_index = thread_index; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, &kv, - nat44_o2i_ed_is_idle_session_cb, - &ctx)) - nat_log_notice ("out2in-ed key add failed"); - - if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF && - ip->src_address.as_u32 == l_key.addr.as_u32)) - { - eh_key.protocol = e_key.protocol; - if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0, - thread_index, &eh_key, - &address_index, - sm->port_per_thread, - tsm->snat_thread_index)) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_OUT_OF_PORTS]; - nat44_delete_session (sm, s, thread_index); - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0)) - nat_log_notice ("out2in-ed key del failed"); - return 0; - } - s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32; - s->ext_host_nat_port = eh_key.port; - s->flags |= SNAT_SESSION_FLAG_TWICE_NAT; - make_ed_kv (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_nat_port); - } - else - { - make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_port); - } - kv.value = s - tsm->sessions; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv, - nat44_i2o_ed_is_idle_session_cb, - &ctx)) - nat_log_notice ("in2out-ed key add failed"); - - return s; -} - -static_always_inline int -icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0) -{ - icmp46_header_t *icmp0; - nat_ed_ses_key_t key0; - icmp_echo_header_t *echo0, *inner_echo0 = 0; - ip4_header_t *inner_ip0; - void *l4_header = 0; - icmp46_header_t *inner_icmp0; - - icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - echo0 = (icmp_echo_header_t *)(icmp0+1); - - if (!icmp_is_error_message (icmp0)) - { - key0.proto = IP_PROTOCOL_ICMP; - key0.l_addr = ip0->dst_address; - key0.r_addr = ip0->src_address; - key0.l_port = echo0->identifier; - key0.r_port = 0; - } - else - { - inner_ip0 = (ip4_header_t *)(echo0+1); - l4_header = ip4_next_header (inner_ip0); - key0.proto = inner_ip0->protocol; - key0.l_addr = inner_ip0->src_address; - key0.r_addr = inner_ip0->dst_address; - switch (ip_proto_to_snat_proto (inner_ip0->protocol)) - { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t*)l4_header; - inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); - key0.l_port = inner_echo0->identifier; - key0.r_port = 0; - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - key0.l_port = ((tcp_udp_header_t*)l4_header)->src_port; - key0.r_port = ((tcp_udp_header_t*)l4_header)->dst_port; - break; - default: - return -1; - } - } - *p_key0 = key0; - return 0; -} - -static int -next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port, - u16 dst_port, u32 thread_index, u32 rx_fib_index) -{ - clib_bihash_kv_16_8_t kv, value; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - - make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, - rx_fib_index, src_port, dst_port); - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) - return 1; - - return 0; -} - -static void -create_bypass_for_fwd(snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index, - u32 thread_index) -{ - nat_ed_ses_key_t key; - clib_bihash_kv_16_8_t kv, value; - udp_header_t *udp; - snat_user_t *u; - snat_session_t *s = 0; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - f64 now = vlib_time_now (sm->vlib_main); - - if (ip->protocol == IP_PROTOCOL_ICMP) - { - if (icmp_get_ed_key (ip, &key)) - return; - } - else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) - { - udp = ip4_next_header(ip); - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = udp->dst_port; - key.r_port = udp->src_port; - } - else - { - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = key.r_port = 0; - } - key.fib_index = 0; - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; - - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) - { - s = pool_elt_at_index (tsm->sessions, value.value); - } - else - { - if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) - return; - - u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index, - thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return; - } - - s = nat_ed_session_alloc (sm, u, thread_index); - if (!s) - { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); - return; - } - - s->ext_host_addr = key.r_addr; - s->ext_host_port = key.r_port; - s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS; - s->outside_address_index = ~0; - s->out2in.addr = key.l_addr; - s->out2in.port = key.l_port; - s->out2in.protocol = ip_proto_to_snat_proto (key.proto); - s->out2in.fib_index = 0; - s->in2out = s->out2in; - user_session_increment (sm, u, 0); - - kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1)) - nat_log_notice ("in2out_ed key add failed"); - } - - if (ip->protocol == IP_PROTOCOL_TCP) - { - tcp_header_t *tcp = ip4_next_header(ip); - if (nat44_set_tcp_session_state_o2i (sm, s, tcp, thread_index)) - return; - } - - /* Accounting */ - nat44_session_update_counters (s, now, 0); -} - -u32 -icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node, - u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip, - u8 * p_proto, snat_session_key_t * p_value, - u8 * p_dont_translate, void * d, void * e) -{ - u32 next = ~0, sw_if_index, rx_fib_index; - icmp46_header_t *icmp; - nat_ed_ses_key_t key; - clib_bihash_kv_16_8_t kv, value; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_session_t *s = 0; - u8 dont_translate = 0, is_addr_only; - snat_session_key_t e_key, l_key; - - icmp = (icmp46_header_t *) ip4_next_header (ip); - sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_RX]; - rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - - if (icmp_get_ed_key (ip, &key)) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next = SNAT_OUT2IN_NEXT_DROP; - goto out; - } - key.fib_index = rx_fib_index; - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) - { - /* Try to match static mapping */ - e_key.addr = ip->dst_address; - e_key.port = key.l_port; - e_key.protocol = ip_proto_to_snat_proto (key.proto); - e_key.fib_index = rx_fib_index; - if (snat_static_mapping_match(sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0)) - { - if (!sm->forwarding_enabled) - { - /* Don't NAT packet aimed at the intfc address */ - if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index, - ip->dst_address.as_u32))) - { - dont_translate = 1; - goto out; - } - b->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next = NAT44_ED_OUT2IN_NEXT_DROP; - goto out; - } - else - { - dont_translate = 1; - if (next_src_nat(sm, ip, key.proto, key.l_port, key.r_port, - thread_index, rx_fib_index)) - { - next = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto out; - } - create_bypass_for_fwd(sm, ip, rx_fib_index, thread_index); - goto out; - } - } - - if (PREDICT_FALSE(icmp->type != ICMP4_echo_reply && - (icmp->type != ICMP4_echo_request || !is_addr_only))) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; - next = NAT44_ED_OUT2IN_NEXT_DROP; - goto out; - } - - /* Create session initiated by host from external network */ - s = create_session_for_static_mapping_ed(sm, b, l_key, e_key, node, - thread_index, 0, 0, - vlib_time_now (sm->vlib_main)); - - if (!s) - { - next = NAT44_ED_OUT2IN_NEXT_DROP; - goto out; - } - } - else - { - if (PREDICT_FALSE(icmp->type != ICMP4_echo_reply && - icmp->type != ICMP4_echo_request && - !icmp_is_error_message (icmp))) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; - next = SNAT_OUT2IN_NEXT_DROP; - goto out; - } - - s = pool_elt_at_index (tsm->sessions, value.value); - } - - *p_proto = ip_proto_to_snat_proto (key.proto); -out: - if (s) - *p_value = s->in2out; - *p_dont_translate = dont_translate; - if (d) - *(snat_session_t**)d = s; - return next; -} - -static snat_session_t * -nat44_ed_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, - vlib_node_runtime_t * node) -{ - clib_bihash_kv_8_8_t kv, value; - clib_bihash_kv_16_8_t s_kv, s_value; - snat_static_mapping_t *m; - u32 old_addr, new_addr; - ip_csum_t sum; - snat_session_t * s; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_user_t *u; - - old_addr = ip->dst_address.as_u32; - - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - rx_fib_index, 0, 0); - - if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &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 - { - if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_log_notice ("maximum sessions exceeded"); - return 0; - } - - make_sm_kv (&kv, &ip->dst_address, 0, 0, 0); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - { - b->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - return 0; - } - - m = pool_elt_at_index (sm->static_mappings, value.value); - - new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; - - u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index, - thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return 0; - } - - /* Create a new session */ - s = nat_ed_session_alloc (sm, u, thread_index); - if (!s) - { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); - return 0; - } - - 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->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - 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; - user_session_increment (sm, u, 1); - - /* Add to lookup tables */ - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1)) - nat_log_notice ("out2in key add failed"); - - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - m->fib_index, 0, 0); - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) - nat_log_notice ("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 */ - nat44_session_update_counters (s, now, - vlib_buffer_length_in_chain (vm, b)); - - return s; -} - -static inline uword -nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_slow_path) -{ - u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; - nat44_ed_out2in_next_t next_index; - snat_main_t *sm = &snat_main; - f64 now = vlib_time_now (vm); - u32 thread_index = vm->thread_index; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - - stats_node_index = is_slow_path ? nat44_ed_out2in_slowpath_node.index : - nat44_ed_out2in_node.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 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from >= 4 && n_left_to_next >= 2) - { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; - u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1, new_addr1; - u16 old_port0, new_port0, old_port1, new_port1; - ip4_header_t *ip0, *ip1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_16_8_t kv0, value0, kv1, value1; - ip_csum_t sum0, sum1; - snat_session_key_t e_key0, l_key0, e_key1, l_key1; - lb_nat_type_t lb_nat0, lb_nat1; - twice_nat_type_t twice_nat0, twice_nat1; - - /* 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); - - next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - 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(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 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } - - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = nat44_ed_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace00; - } - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - goto trace00; - } - } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } - - if (ip4_is_fragment (ip0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace00; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } - } - - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol, - rx_fib_index0, udp0->dst_port, udp0->src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, &ip0->src_address)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace00; - } - - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat(sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace00; - } - create_bypass_for_fwd(sm, ip0, rx_fib_index0, - thread_index); - } - goto trace00; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed(sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, - lb_nat0, - now); - - if (!s0) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace00; - } - } - else - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } - } - else - { - s0 = pool_elt_at_index (tsm->sessions, value0.value); - } - - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - new_port0 = tcp0->dst_port = s0->in2out.port; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold(sum0); - if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index)) - goto trace00; - } - else - { - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - - trace00: - if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = s0 - tsm->sessions; - } - - pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP; - - next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b1)->snat.flags = 0; - ip1 = vlib_buffer_get_current (b1); - - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index1); - - 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 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace01; - } - - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto1 == ~0)) - { - s1 = nat44_ed_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1, - thread_index, now, vm, node); - if (!sm->forwarding_enabled) - { - if (!s1) - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace01; - } - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_ed_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - goto trace01; - } - } - else - { - if (PREDICT_FALSE (proto1 == ~0)) - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } - - if (ip4_is_fragment (ip1)) - { - next1 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace01; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } - } - - make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address, ip1->protocol, - rx_fib_index1, udp1->dst_port, udp1->src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key1.addr = ip1->dst_address; - e_key1.port = udp1->dst_port; - e_key1.protocol = proto1; - e_key1.fib_index = rx_fib_index1; - if (snat_static_mapping_match(sm, e_key1, &l_key1, 1, 0, - &twice_nat1, &lb_nat1, &ip1->src_address)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP - && (udp1->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next1, b1); - goto trace01; - } - - if (!sm->forwarding_enabled) - { - b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat(sm, ip1, ip1->protocol, - udp1->src_port, udp1->dst_port, - thread_index, rx_fib_index1)) - { - next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace01; - } - create_bypass_for_fwd(sm, ip1, rx_fib_index1, - thread_index); - } - goto trace01; - } - - /* Create session initiated by host from external network */ - s1 = create_session_for_static_mapping_ed(sm, b1, l_key1, - e_key1, node, - thread_index, - twice_nat1, - lb_nat1, - now); - - if (!s1) - { - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace01; - } - } - else - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } - } - else - { - s1 = pool_elt_at_index (tsm->sessions, value1.value); - } - - old_addr1 = ip1->dst_address.as_u32; - new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32; - vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) - { - old_port1 = tcp1->dst_port; - new_port1 = tcp1->dst_port = s1->in2out.port; - - sum1 = tcp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, - length); - if (is_twice_nat_session (s1)) - { - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum1 = ip_csum_update (sum1, tcp1->src_port, - s1->ext_host_nat_port, ip4_header_t, - length); - tcp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - tcp1->checksum = ip_csum_fold(sum1); - if (nat44_set_tcp_session_state_o2i (sm, s1, tcp1, thread_index)) - goto trace01; - } - else - { - udp1->dst_port = s1->in2out.port; - if (is_twice_nat_session (s1)) - { - udp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - udp1->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, b1)); - - trace01: - if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = s1 - tsm->sessions; - } - - pkts_processed += next1 != NAT44_ED_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; + u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t * icmp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - snat_session_key_t e_key0, l_key0; - lb_nat_type_t lb_nat0; - twice_nat_type_t twice_nat0; - - /* speculatively enqueue b0 to the current next frame */ + u32 next0; + u8 cached0 = 0; + ip4_header_t *ip0; + nat_reass_ip4_t *reass0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_key_t key0, sm0; + clib_bihash_kv_8_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; @@ -2704,587 +1328,190 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - 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(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 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace0; - } - - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = nat44_ed_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - goto trace0; - } - } - else - { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace0; - } - - if (ip4_is_fragment (ip0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace0; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace0; - } - } - - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol, - rx_fib_index0, udp0->dst_port, udp0->src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, &ip0->src_address)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat(sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace0; - } - create_bypass_for_fwd(sm, ip0, rx_fib_index0, - thread_index); - } - goto trace0; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed(sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, - lb_nat0, - now); - - if (!s0) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - } - else - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace0; - } - } - else - { - s0 = pool_elt_at_index (tsm->sessions, value0.value); - } - - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - new_port0 = tcp0->dst_port = s0->in2out.port; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold(sum0); - if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index)) - goto trace0; - } - else - { - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - - trace0: - if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = s0 - tsm->sessions; - } - - pkts_processed += next0 != NAT44_ED_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); - } + next0 = SNAT_OUT2IN_NEXT_LOOKUP; - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } + 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); - vlib_node_increment_counter (vm, stats_node_index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); - return frame->n_vectors; -} - -static uword -nat44_ed_out2in_fast_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0); -} - -VLIB_REGISTER_NODE (nat44_ed_out2in_node) = { - .function = nat44_ed_out2in_fast_path_fn, - .name = "nat44-ed-out2in", - .vector_size = sizeof (u32), - .format_trace = format_nat44_ed_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 = NAT44_ED_OUT2IN_N_NEXT, - - /* edit / add dispositions here */ - .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", - }, -}; + if (PREDICT_FALSE (nat_reass_is_drop_frag (0))) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT]; + goto trace0; + } -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_node, nat44_ed_out2in_fast_path_fn); + ip0 = (ip4_header_t *) vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + proto0 = ip_proto_to_snat_proto (ip0->protocol); -static uword -nat44_ed_out2in_slow_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1); -} + reass0 = nat_ip4_reass_find_or_create (ip0->src_address, + ip0->dst_address, + ip0->fragment_id, + ip0->protocol, + 1, &fragments_to_drop); -VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = { - .function = nat44_ed_out2in_slow_path_fn, - .name = "nat44-ed-out2in-slowpath", - .vector_size = sizeof (u32), - .format_trace = format_nat44_ed_out2in_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(snat_out2in_error_strings), - .error_strings = snat_out2in_error_strings, + if (PREDICT_FALSE (!reass0)) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS]; + nat_log_notice ("maximum reassemblies exceeded"); + goto trace0; + } - .runtime_data_bytes = sizeof (snat_runtime_t), + if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) + { + key0.addr = ip0->dst_address; + key0.port = udp0->dst_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; + kv0.key = key0.as_u64; + + if (clib_bihash_search_8_8 + (&per_thread_data->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, 0, 0, 0, 0)) + { + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP + && (udp0->dst_port + == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) + { + vnet_feature_next (&next0, b0); + goto trace0; + } - .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT, + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + } + goto trace0; + } - /* edit / add dispositions here */ - .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", - }, -}; + /* Create session initiated by host from external network */ + s0 = + create_session_for_static_mapping (sm, b0, sm0, key0, + node, thread_index, + now); + if (!s0) + { + b0->error = + node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace0; + } + reass0->sess_index = s0 - per_thread_data->sessions; + reass0->thread_index = thread_index; + } + 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 (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0)) + { + if (nat_ip4_reass_add_fragment + (reass0, bi0, &fragments_to_drop)) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG]; + nat_log_notice + ("maximum fragments per reassembly exceeded"); + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace0; + } + cached0 = 1; + goto trace0; + } + s0 = pool_elt_at_index (per_thread_data->sessions, + reass0->sess_index); + } -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_slowpath_node, - nat44_ed_out2in_slow_path_fn); + 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; -static uword -nat44_ed_out2in_reass_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; - u32 pkts_processed = 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; + 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); - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) + { + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + 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, + 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 = s0->in2out.port; + udp0->checksum = 0; + } + } - while (n_left_from > 0) - { - u32 n_left_to_next; + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, + b0)); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + 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; + } - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; - vlib_buffer_t *b0; - u32 next0; - u8 cached0 = 0; - ip4_header_t *ip0; - 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; - snat_session_key_t e_key0, l_key0; - lb_nat_type_t lb0; - twice_nat_type_t twice_nat0; - - /* 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; + if (cached0) + { + n_left_to_next++; + to_next--; + } + else + { + pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; - b0 = vlib_get_buffer (vm, bi0); - next0 = NAT44_ED_OUT2IN_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 = NAT44_ED_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT]; - goto trace0; - } - - ip0 = (ip4_header_t *) vlib_buffer_get_current (b0); - 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 = NAT44_ED_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS]; - nat_log_notice ("maximum reassemblies exceeded"); - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - 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, thread_index, &s0); - - if (PREDICT_TRUE(next0 != NAT44_ED_OUT2IN_NEXT_DROP)) - { - if (s0) - reass0->sess_index = s0 - per_thread_data->sessions; - else - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - reass0->thread_index = thread_index; - nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); - } - - goto trace0; - } - - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol, - rx_fib_index0, udp0->dst_port, udp0->src_port); - - if (clib_bihash_search_16_8 (&per_thread_data->out2in_ed, &kv0, &value0)) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb0, 0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port - == clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next(&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat(sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace0; - } - create_bypass_for_fwd(sm, ip0, rx_fib_index0, - thread_index); - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); - } - goto trace0; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed(sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, lb0, - now); - if (!s0) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - reass0->sess_index = s0 - per_thread_data->sessions; - reass0->thread_index = thread_index; - } - 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 (reass0, bi0, &fragments_to_drop)) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG]; - nat_log_notice ("maximum fragments per reassembly exceeded"); - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - cached0 = 1; - goto trace0; - } - s0 = pool_elt_at_index (per_thread_data->sessions, - reass0->sess_index); - } - - 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; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_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->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, - ip4_header_t, - dst_address /* changed member */); - - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */, - length /* changed member */); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold(sum0); - } - else - { - old_port0 = udp0->dst_port; - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = 0; - } - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0)); - /* 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_out2in_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--; - } - else - { - pkts_processed += next0 != NAT44_ED_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); - } + /* 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)) { @@ -3292,76 +1519,73 @@ nat44_ed_out2in_reass_node_fn (vlib_main_t * vm, u32 len = vec_len (fragments_to_loopback); if (len <= VLIB_FRAME_SIZE) { - clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len); + clib_memcpy (from, fragments_to_loopback, + sizeof (u32) * len); n_left_from = len; vec_reset_length (fragments_to_loopback); } else { clib_memcpy (from, - fragments_to_loopback + (len - VLIB_FRAME_SIZE), - sizeof (u32) * VLIB_FRAME_SIZE); + 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, nat44_out2in_reass_node.index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); + SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, + pkts_processed); nat_send_all_to_node (vm, fragments_to_drop, node, - &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT], - SNAT_OUT2IN_NEXT_DROP); + &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT], + SNAT_OUT2IN_NEXT_DROP); vec_free (fragments_to_drop); vec_free (fragments_to_loopback); return frame->n_vectors; } -VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = { - .function = nat44_ed_out2in_reass_node_fn, - .name = "nat44-ed-out2in-reass", +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat44_out2in_reass_node) = { + .function = nat44_out2in_reass_node_fn, + .name = "nat44-out2in-reass", .vector_size = sizeof (u32), - .format_trace = format_nat44_out2in_reass_trace, + .format_trace = format_nat44_reass_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(snat_out2in_error_strings), .error_strings = snat_out2in_error_strings, - .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT, + .n_next_nodes = SNAT_OUT2IN_N_NEXT, /* edit / add dispositions here */ .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", + [SNAT_OUT2IN_NEXT_DROP] = "error-drop", + [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", + [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", }, }; +/* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_reass_node, - nat44_ed_out2in_reass_node_fn); +VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node, + nat44_out2in_reass_node_fn); -/**************************/ -/*** deterministic mode ***/ -/**************************/ static uword -snat_det_out2in_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +snat_out2in_fast_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + 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 = vm->thread_index; + snat_main_t *sm = &snat_main; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -3371,310 +1595,26 @@ snat_det_out2in_node_fn (vlib_main_t * vm, { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); - - while (n_left_from >= 4 && n_left_to_next >= 2) - { - 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)) - { - nat_log_info ("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)) - { - nat_log_info ("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)) - { - nat_log_info ("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)) - { - nat_log_info ("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); - } + 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; - 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 */ + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_DROP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_key_t key0, sm0; + u32 proto0; + u32 rx_fib_index0; + + /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; @@ -3684,643 +1624,112 @@ snat_det_out2in_node_fn (vlib_main_t * vm, 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)) - { - nat_log_info ("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)) - { - nat_log_info ("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 - { - 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; - } - - 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); - } + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - 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 = "nat44-det-out2in", - .vector_size = sizeof (u32), - .format_trace = format_snat_out2in_trace, - .type = VLIB_NODE_TYPE_INTERNAL, + 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); - .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", - [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", - }, -}; -VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn); - -/** - * Get address and port values to be used for ICMP packet translation - * and create session if needed - * - * @param[in,out] sm NAT main - * @param[in,out] node NAT 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, - ip4_header_t *ip0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) -{ - 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; - - 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; - } - nat_log_info ("unknown dst address: %U", - format_ip4_address, &ip0->dst_address); - goto out; - } - - 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; - } - nat_log_info ("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; -} + vnet_feature_next (&next0, b0); -/**********************/ -/*** 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, *to_next_drop = 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_queue_t *fq; - 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 = vm->thread_index; - vlib_frame_t *d = 0; + 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; + } - ASSERT (vec_len (sm->workers)); + proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0)) - { - vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1); + if (PREDICT_FALSE (proto0 == ~0)) + goto trace00; - vec_validate_init_empty (congested_handoff_queue_by_worker_index, - tm->n_vlib_mains - 1, - (vlib_frame_queue_t *) (~0)); - } - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, ~0, 0, 0); + goto trace00; + } - 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; - - if (next_worker_index != current_worker_index) - { - fq = is_vlib_frame_queue_congested ( - sm->fq_out2in_index, next_worker_index, NAT_FQ_NELTS - 2, - congested_handoff_queue_by_worker_index); - - if (fq) - { - /* if this is 1st frame */ - if (!d) - { - d = vlib_get_frame_to_node (vm, sm->error_node_index); - to_next_drop = vlib_frame_vector_args (d); - } - - to_next_drop[0] = bi0; - to_next_drop += 1; - d->n_vectors++; - b0->error = node->errors[SNAT_OUT2IN_ERROR_FQ_CONGESTED]; - goto trace0; - } - - if (hf) - hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; - - hf = vlib_get_worker_handoff_queue_elt (sm->fq_out2in_index, - next_worker_index, - handoff_queue_elt_by_worker_index); - - n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors; - to_next_worker = &hf->buffer_index[hf->n_vectors]; - current_worker_index = next_worker_index; - } - - /* enqueue to correct worker thread */ - to_next_worker[0] = bi0; - to_next_worker++; - n_left_to_next_worker--; - - if (n_left_to_next_worker == 0) - { - hf->n_vectors = VLIB_FRAME_SIZE; - vlib_put_frame_queue_elt (hf); - current_worker_index = ~0; - handoff_queue_elt_by_worker_index[next_worker_index] = 0; - hf = 0; - } - } - else - { - do_handoff = 0; - /* if this is 1st frame */ - if (!f) - { - f = vlib_get_frame_to_node (vm, sm->out2in_node_index); - to_next = vlib_frame_vector_args (f); - } - - to_next[0] = bi0; - to_next += 1; - f->n_vectors++; - } - -trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_worker_handoff_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->next_worker_index = next_worker_index; - t->do_handoff = do_handoff; - } - } + key0.addr = ip0->dst_address; + key0.port = udp0->dst_port; + key0.fib_index = rx_fib_index0; - if (f) - vlib_put_frame_to_node (vm, sm->out2in_node_index, f); + if (snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0)) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace00; + } - if (d) - vlib_put_frame_to_node (vm, sm->error_node_index, d); + new_addr0 = sm0.addr.as_u32; + new_port0 = 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; - if (hf) - hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; + 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); - /* Ship frames to the worker nodes */ - for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++) - { - if (handoff_queue_elt_by_worker_index[i]) - { - hf = handoff_queue_elt_by_worker_index[i]; - /* - * It works better to let the handoff node - * rate-adapt, always ship the handoff queue element. - */ - if (1 || hf->n_vectors == hf->last_n_vectors) + if (PREDICT_FALSE (new_port0 != udp0->dst_port)) { - vlib_put_frame_queue_elt (hf); - handoff_queue_elt_by_worker_index[i] = 0; + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->dst_port; + tcp0->dst_port = new_port0; + + 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 */ ); + tcp0->checksum = ip_csum_fold (sum0); + } + else + { + old_port0 = udp0->dst_port; + udp0->dst_port = new_port0; + udp0->checksum = 0; + } } else - hf->last_n_vectors = hf->n_vectors; - } - congested_handoff_queue_by_worker_index[i] = - (vlib_frame_queue_t *) (~0); - } - hf = 0; - current_worker_index = ~0; - return frame->n_vectors; -} - -VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = { - .function = snat_out2in_worker_handoff_fn, - .name = "nat44-out2in-worker-handoff", - .vector_size = sizeof (u32), - .format_trace = format_snat_out2in_worker_handoff_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(snat_out2in_error_strings), - .error_strings = snat_out2in_error_strings, - - .n_next_nodes = 1, - - .next_nodes = { - [0] = "error-drop", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node, snat_out2in_worker_handoff_fn); - -static uword -snat_out2in_fast_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, * from, * to_next; - snat_out2in_next_t next_index; - u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; - - 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; - vlib_buffer_t * b0; - u32 next0 = SNAT_OUT2IN_NEXT_DROP; - u32 sw_if_index0; - ip4_header_t * ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t * udp0; - tcp_header_t * tcp0; - icmp46_header_t * icmp0; - snat_session_key_t key0, sm0; - u32 proto0; - u32 rx_fib_index0; - - /* 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; + { + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); - b0 = vlib_get_buffer (vm, bi0); + tcp0->checksum = ip_csum_fold (sum0); + } + } - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; + trace00: - 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); + 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; + } - vnet_feature_next (&next0, b0); + pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; - 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)) - goto trace00; - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, ~0, 0, 0); - goto trace00; - } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.fib_index = rx_fib_index0; - - if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0)) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace00; - } - - new_addr0 = sm0.addr.as_u32; - new_port0 = 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_port0 != udp0->dst_port)) - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - tcp0->dst_port = new_port0; - - 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 */); - tcp0->checksum = ip_csum_fold(sum0); - } - else - { - old_port0 = udp0->dst_port; - udp0->dst_port = new_port0; - udp0->checksum = 0; - } - } - else - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */); - - tcp0->checksum = ip_csum_fold(sum0); - } - } - - 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; - } - - pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; - - /* verify speculative enqueue, maybe switch current next frame */ + /* 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); @@ -4330,11 +1739,12 @@ snat_out2in_fast_node_fn (vlib_main_t * vm, } vlib_node_increment_counter (vm, snat_out2in_fast_node.index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); + SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, + pkts_processed); return frame->n_vectors; } +/* *INDENT-OFF* */ VLIB_REGISTER_NODE (snat_out2in_fast_node) = { .function = snat_out2in_fast_node_fn, .name = "nat44-out2in-fast", @@ -4357,4 +1767,15 @@ VLIB_REGISTER_NODE (snat_out2in_fast_node) = { [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", }, }; -VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node, snat_out2in_fast_node_fn); +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node, + snat_out2in_fast_node_fn); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |