#include <vnet/vnet.h>
#include <vnet/fib/ip4_fib.h>
#include <nat/nat.h>
-#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
#define foreach_nat44_classify_error \
-_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded") \
_(NEXT_IN2OUT, "next in2out") \
_(NEXT_OUT2IN, "next out2in") \
_(FRAG_CACHED, "fragment cached")
static inline uword
nat44_classify_node_fn_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_ed)
+ vlib_frame_t * frame)
{
u32 n_left_from, *from, *to_next;
nat44_classify_next_t next_index;
snat_main_t *sm = &snat_main;
snat_static_mapping_t *m;
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 *fragments_to_drop = 0;
u32 *fragments_to_loopback = 0;
u32 next_in2out = 0, next_out2in = 0, frag_cached = 0;
{
u32 bi0;
vlib_buffer_t *b0;
- u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT, sw_if_index0, rx_fib_index0;
+ u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
ip4_header_t *ip0;
snat_address_t *ap;
snat_session_key_t m_key0;
clib_bihash_kv_8_8_t kv0, value0;
- clib_bihash_kv_16_8_t ed_kv0, ed_value0;
- udp_header_t *udp0;
- nat_reass_ip4_t *reass0;
u8 cached0 = 0;
/* speculatively enqueue b0 to the current next frame */
b0 = vlib_get_buffer (vm, bi0);
ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- if (is_ed && ip0->protocol != IP_PROTOCOL_ICMP)
+ /* *INDENT-OFF* */
+ vec_foreach (ap, sm->addresses)
+ {
+ if (ip0->dst_address.as_u32 == ap->addr.as_u32)
+ {
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ goto enqueue0;
+ }
+ }
+ /* *INDENT-ON* */
+
+ if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
{
- if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
+ m_key0.addr = ip0->dst_address;
+ m_key0.port = 0;
+ m_key0.protocol = 0;
+ m_key0.fib_index = 0;
+ kv0.key = m_key0.as_u64;
+ /* try to classify the fragment based on IP header alone */
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
+ &kv0, &value0))
{
- /* process leading fragment/whole packet (with L4 header) */
- 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);
- make_ed_kv (&ed_kv0, &ip0->src_address, &ip0->dst_address,
- ip0->protocol, rx_fib_index0, udp0->src_port,
- udp0->dst_port);
- if (ip4_is_fragment (ip0))
- {
- 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_CLASSIFY_NEXT_DROP;
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
- &ed_value0))
- {
- /* session exists so classify as IN2OUT,
- * save this information for future fragments and set
- * past fragments to be looped over and reprocessed */
- reass0->sess_index = ed_value0.value;
- reass0->classify_next =
- NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- goto enqueue0;
- }
- else
- {
- /* session doesn't exist so continue in the code,
- * save this information for future fragments and set
- * past fragments to be looped over and reprocessed */
- reass0->flags |=
- NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- }
- else
- {
- /* process whole packet */
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
- &ed_value0))
- goto enqueue0;
- /* session doesn't exist so continue in code */
- }
+ m = pool_elt_at_index (sm->static_mappings, value0.value);
+ if (m->local_addr.as_u32 != m->external_addr.as_u32)
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ goto enqueue0;
+ }
+ m_key0.port =
+ clib_net_to_host_u16 (vnet_buffer (b0)->ip.reass.l4_dst_port);
+ m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
+ kv0.key = m_key0.as_u64;
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv0, &value0))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value0.value);
+ if (m->local_addr.as_u32 != m->external_addr.as_u32)
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ }
+ }
+
+ enqueue0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_classify_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ if (!cached0)
+ t->next_in2out = next0 == NAT44_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ frag_cached++;
+ }
+ else
+ {
+ next_in2out += next0 == NAT44_CLASSIFY_NEXT_IN2OUT;
+ next_out2in += next0 == NAT44_CLASSIFY_NEXT_OUT2IN;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy_fast (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
}
else
{
- /* process non-first fragment */
- 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_CLASSIFY_NEXT_DROP;
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- /* check if first fragment has arrived */
- if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE &&
- !(reass0->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE))
- {
- /* first fragment still hasn't arrived, cache this fragment */
- if (nat_ip4_reass_add_fragment
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
- nat_log_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- goto enqueue0;
- }
- cached0 = 1;
- goto enqueue0;
- }
- if (reass0->classify_next ==
- NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
- goto enqueue0;
- /* flag NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE is set
- * so keep the default next0 and continue in code to
- * potentially find other classification for this packet */
+ clib_memcpy_fast (from, fragments_to_loopback +
+ (len - VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
}
}
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ nat_send_all_to_node (vm, fragments_to_drop, node, 0,
+ NAT44_CLASSIFY_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT44_CLASSIFY_ERROR_NEXT_IN2OUT, next_in2out);
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT44_CLASSIFY_ERROR_NEXT_OUT2IN, next_out2in);
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT44_CLASSIFY_ERROR_FRAG_CACHED, frag_cached);
+
+ return frame->n_vectors;
+}
+
+static inline uword
+nat44_ed_classify_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ nat44_classify_next_t next_index;
+ snat_main_t *sm = &snat_main;
+ snat_static_mapping_t *m;
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+ u32 next_in2out = 0, next_out2in = 0, frag_cached = 0;
+ u8 in_loopback = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 =
+ NAT_NEXT_IN2OUT_ED_FAST_PATH, sw_if_index0, rx_fib_index0;
+ ip4_header_t *ip0;
+ snat_address_t *ap;
+ snat_session_key_t m_key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ clib_bihash_kv_16_8_t ed_kv0, ed_value0;
+ u8 cached0 = 0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+
+ if (!in_loopback)
+ {
+ u32 arc_next = 0;
+
+ vnet_feature_next (&arc_next, b0);
+ nat_buffer_opaque (b0)->arc_next = arc_next;
+ }
+
+ if (ip0->protocol != IP_PROTOCOL_ICMP)
+ {
+ /* process leading fragment/whole packet (with L4 header) */
+ 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);
+ make_ed_kv (&ed_kv0, &ip0->src_address,
+ &ip0->dst_address, ip0->protocol,
+ rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port);
+ /* process whole packet */
+ if (!clib_bihash_search_16_8
+ (&tsm->in2out_ed, &ed_kv0, &ed_value0))
+ goto enqueue0;
+ /* session doesn't exist so continue in code */
+ }
/* *INDENT-OFF* */
vec_foreach (ap, sm->addresses)
{
if (ip0->dst_address.as_u32 == ap->addr.as_u32)
{
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ next0 = NAT_NEXT_OUT2IN_ED_FAST_PATH;
goto enqueue0;
}
}
{
m = pool_elt_at_index (sm->static_mappings, value0.value);
if (m->local_addr.as_u32 != m->external_addr.as_u32)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ next0 = NAT_NEXT_OUT2IN_ED_FAST_PATH;
goto enqueue0;
}
- if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
- {
- /* process leading fragment/whole packet (with L4 header) */
- m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
- m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
- kv0.key = m_key0.as_u64;
- if (!clib_bihash_search_8_8
- (&sm->static_mapping_by_external, &kv0, &value0))
- {
- m =
- pool_elt_at_index (sm->static_mappings, value0.value);
- if (m->local_addr.as_u32 != m->external_addr.as_u32)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- }
- if (ip4_is_fragment (ip0))
- {
- 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_CLASSIFY_NEXT_DROP;
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- /* save classification for future fragments and set past
- * fragments to be looped over and reprocessed */
- if (next0 == NAT44_CLASSIFY_NEXT_OUT2IN)
- reass0->classify_next =
- NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN;
- else
- reass0->classify_next =
- NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- }
- else
+ m_key0.port =
+ clib_net_to_host_u16 (vnet_buffer (b0)->ip.reass.l4_dst_port);
+ m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
+ kv0.key = m_key0.as_u64;
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv0, &value0))
{
- /* process non-first fragment */
- 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_CLASSIFY_NEXT_DROP;
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE)
- /* first fragment still hasn't arrived */
- {
- if (nat_ip4_reass_add_fragment
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error =
- node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
- nat_log_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- goto enqueue0;
- }
- cached0 = 1;
- goto enqueue0;
- }
- else if (reass0->classify_next ==
- NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- else if (reass0->classify_next ==
- NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
- next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
+ m = pool_elt_at_index (sm->static_mappings, value0.value);
+ if (m->local_addr.as_u32 != m->external_addr.as_u32)
+ next0 = NAT_NEXT_OUT2IN_ED_FAST_PATH;
}
}
vlib_add_trace (vm, node, b0, sizeof (*t));
t->cached = cached0;
if (!cached0)
- t->next_in2out = next0 == NAT44_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
+ t->next_in2out =
+ next0 == NAT_NEXT_IN2OUT_ED_FAST_PATH ? 1 : 0;
}
if (cached0)
}
else
{
- next_in2out += next0 == NAT44_CLASSIFY_NEXT_IN2OUT;
- next_out2in += next0 == NAT44_CLASSIFY_NEXT_OUT2IN;
+ next_in2out += next0 == NAT_NEXT_IN2OUT_ED_FAST_PATH;
+ next_out2in += next0 == NAT_NEXT_OUT2IN_ED_FAST_PATH;
/* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
if (n_left_from == 0 && vec_len (fragments_to_loopback))
{
+ in_loopback = 1;
from = vlib_frame_vector_args (frame);
u32 len = vec_len (fragments_to_loopback);
if (len <= VLIB_FRAME_SIZE)
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
+ return nat44_classify_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_classify_node_fn_inline (vm, node, frame, 1);
+ return nat44_ed_classify_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_classify_node) = {
.name = "nat44-ed-classify",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat44_classify_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
- .next_nodes = {
- [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-ed-out2in",
- [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
- },
};
/* *INDENT-ON* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
+ return nat44_classify_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
+ return nat44_classify_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
Code Review / vpp.git / blobdiff