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authorMatus Fabian <matfabia@cisco.com>2018-09-20 23:18:41 -0700
committerMatus Fabian <matfabia@cisco.com>2018-09-21 04:07:37 -0700
commitab395ec884d0ec9279893b1695379e97acd1f24d (patch)
treef04db4d5da24c6598fe3b2aae29d937fa267de9c /src/plugins/nat/out2in.c
parent22030434ac9a3a7296617b996268e79dbf8bbffa (diff)
NAT: Refactoring / Housekeeping (VPP-1415)
Change-Id: Ia3ce24cc94f9b2fb331ad62a4181ddcd41bc78ca Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/out2in.c')
-rwxr-xr-xsrc/plugins/nat/out2in.c4713
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:
+ */