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/*
*---------------------------------------------------------------------------
* cnat_ipv4_udp_inside_input_exception_stages.c - cnat_ipv4_udp_inside_input_exception node pipeline stage functions
*
*
* Copyright (c) 2008-2014 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*---------------------------------------------------------------------------
*/
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vppinfra/error.h>
#include <vnet/buffer.h>
#include "cnat_global.h"
#include "cnat_db.h"
#include "cnat_ipv4_udp.h"
/*
* Dump these counters via the "show error" CLI command
*/
#define foreach_cnat_ipv4_udp_inside_input_exc_error \
_(CNAT_V4_UDP_I2O_T_PKT, "v4 udp i2o transmit") \
_(CNAT_V4_UDP_I2O_D_PKT, "v4 udp i2o drop") \
_(CNAT_V4_ICMP_G_I2O_T_PKT, "v4 udp i2o icmp msg gen") \
_(CNAT_V4_UDP_I2O_DC_PKT, "v4 udp i2o (no config) drop") \
_(CNAT_V4_UDP_I2O_DR_PKT, "v4 udp i2o (not in run state) drop") \
_(CNAT_V4_UDP_I2O_DD_PKT, "v4 udp i2o (no direct port) drop") \
_(CNAT_V4_UDP_I2O_DA_PKT, "v4 udp i2o (no any port) drop") \
_(CNAT_V4_UDP_I2O_DO_PKT, "v4 udp i2o (out of port limit) drop") \
_(CNAT_V4_UDP_I2O_DI_PKT, "v4 udp i2o (invalid packet) drop") \
_(CNAT_V4_UDP_I2O_DS_PKT, "v4 udp i2o (no sessoon db) drop")
typedef enum {
#define _(sym,str) sym,
foreach_cnat_ipv4_udp_inside_input_exc_error
#undef _
CNAT_IPV4_UDP_INSIDE_INPUT_EXCEPTIONS_N_ERROR,
} cnat_ipv4_udp_inside_input_exc_error_t;
static char * cnat_ipv4_udp_inside_input_exc_error_strings[] = {
#define _(sym,string) string,
foreach_cnat_ipv4_udp_inside_input_exc_error
#undef _
};
typedef struct {
u32 cached_next_index;
/* $$$$ add data here */
/* convenience variables */
vlib_main_t * vlib_main;
vnet_main_t * vnet_main;
} cnat_ipv4_udp_inside_input_exc_main_t;
typedef enum {
CNAT_V4_UDP_I2O_T,
CNAT_V4_UDP_I2O_D,
CNAT_V4_ICMP_G_I2O_T = CNAT_V4_UDP_I2O_D, /* TOBE_PORTED */
CNAT_V4_UDP_INSIDE_INPUT_EXC_N_NEXT,
} cnat_ipv4_udp_inside_input_exc_next_t;
cnat_ipv4_udp_inside_input_exc_main_t cnat_ipv4_udp_inside_input_exc_main;
vlib_node_registration_t cnat_ipv4_udp_inside_input_exc_node;
#define NSTAGES 2
/*
* Use the generic buffer metadata + first line of packet data prefetch
* stage function from <api/pipeline.h>. This is usually a Good Idea.
*/
#define stage0 generic_stage0
static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node,
u32 bi)
{
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi);
vlib_node_t *n =
vlib_get_node (vm, cnat_ipv4_udp_inside_input_exc_node.index);
u32 node_counter_base_index = n->error_heap_index;
vlib_error_main_t * em = &vm->error_main;
cnat_gen_icmp_info info;
cnat_db_key_bucket_t ki;
spp_ctx_t *ctx __attribute__((unused))
= (spp_ctx_t *) &vnet_buffer(b0)->vcgn_uii;
cnat_main_db_entry_t *db = NULL;
ipv4_header *ip = (ipv4_header *)vlib_buffer_get_current(b0);
u8 ipv4_hdr_len = (ip->version_hdr_len_words & 0xf) << 2;
udp_hdr_type_t *udp = (udp_hdr_type_t *)((u8*)ip + ipv4_hdr_len);
int disposition = CNAT_V4_UDP_I2O_T;
int counter = CNAT_V4_UDP_I2O_T_PKT;
cnat_key_t dest_info;
PLATFORM_CNAT_SET_RX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_RX],
vnet_buffer(b0)->vcgn_uii.key.k.vrf,
CNAT_UDP)
vnet_buffer(b0)->vcgn_uii.key.k.ipv4 = clib_net_to_host_u32(ip->src_addr);
PLATFORM_CNAT_SET_RX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_RX],
ki.k.k.vrf, CNAT_UDP)
ki.k.k.ipv4 = clib_net_to_host_u32(ip->src_addr);
/* MUST REVISIT: commentting frag check. Unconditional destination port
* update. DONOT remove this #if 0 */
ki.k.k.port =
clib_net_to_host_u16(udp->src_port);
dest_info.k.port =
clib_net_to_host_u16(udp->dest_port);
#if 0
if(PREDICT_FALSE(ctx->ru.rx.frag)) {
#ifdef TOBE_PORTED
/* Must have routed through cnat_v4_frag_in2out node */
u16 *feature_data_ports = (u16 *)&ctx->feature_data[2];
ki.k.k.port = *feature_data_ports;
feature_data_ports++;
dest_info.k.port = *feature_data_ports;
#endif
} else {
ki.k.k.port =
clib_net_to_host_u16(udp->src_port);
dest_info.k.port =
clib_net_to_host_u16(udp->dest_port);
}
#endif /* if 0 */
dest_info.k.ipv4 = clib_net_to_host_u32(ip->dest_addr);
PLATFORM_CNAT_SET_RX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_RX],
dest_info.k.vrf, CNAT_UDP)
if (PREDICT_TRUE(ki.k.k.port)) {
if (ki.k.k.port & 0x1) {
db = cnat_get_main_db_entry_v2(&ki, PORT_S_ODD, PORT_TYPE_DYNAMIC,
&info, &dest_info);
} else {
db = cnat_get_main_db_entry_v2(&ki, PORT_S_EVEN, PORT_TYPE_DYNAMIC,
&info, &dest_info);
}
} else {
/*
* No UDP port value of 0 - drop it
*/
db = NULL;
info.error = CNAT_ERR_BAD_TCP_UDP_PORT;
}
if (PREDICT_TRUE((u64)db)) {
if (PLATFORM_HANDLE_TTL_DECREMENT) {
/*
* Decrement TTL and update IPv4 checksum
*/
ipv4_decr_ttl_n_calc_csum(ip);
}
/*
* step 6 do nat before fwd pkt
*/
swap_ip_src_udp_port(ip, udp, db);
/*
* update db for this pkt
*/
CNAT_DB_UPDATE_IN2OUT_TIMER
/* Check timeout db if there is config for this */
(void) query_and_update_db_timeout((void *)db, MAIN_DB_TYPE);
/* Temporarily keeping it commented */
//PLATFORM_CNAT_SET_TX_VRF(vnet_buffer(b0)->sw_if_index[VLIB_TX],
// db->out2in_key.k.vrf)
in2out_forwarding_count++;
} else {
switch (info.error) {
case (CNAT_NO_VRF_RUN):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DR_PKT] += 1;
break;
case (CNAT_OUT_LIMIT):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DO_PKT] += 1;
break;
case (CNAT_NO_PORT_ANY):
case (CNAT_NO_POOL_ANY):
case (CNAT_BAD_INUSE_ANY):
case (CNAT_NOT_FOUND_ANY):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DA_PKT] += 1;
break;
case (CNAT_INV_PORT_DIRECT):
case (CNAT_DEL_PORT_DIRECT):
case (CNAT_BAD_INUSE_DIRECT):
case (CNAT_NOT_FOUND_DIRECT):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DD_PKT] += 1;
break;
case (CNAT_ERR_BAD_TCP_UDP_PORT):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DI_PKT] += 1;
break;
case (CNAT_ERR_NO_SESSION_DB):
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DS_PKT] += 1;
break;
default:
em->counters[node_counter_base_index + CNAT_V4_UDP_I2O_DC_PKT] += 1;
break;
}
/*
* send to icmp msg generate node
*/
if (info.gen_icmp_msg == CNAT_ICMP_MSG) {
#ifdef TOBE_PORTED
u32 *fd = (u32*)ctx->feature_data;
fd[0] = info.svi_addr;
fd[1] = CNAT_ICMP_DEST_UNREACHABLE;
#endif
disposition = CNAT_V4_ICMP_G_I2O_T;
counter = CNAT_V4_ICMP_G_I2O_T_PKT;
} else {
disposition = CNAT_V4_UDP_I2O_D;
counter = CNAT_V4_UDP_I2O_D_PKT;
}
DEBUG_I2O_DROP(CNAT_DEBUG_DROP_UDP)
}
em->counters[node_counter_base_index + counter] += 1;
return disposition;
}
#include <vnet/pipeline.h>
static uword cnat_ipv4_udp_inside_input_exc_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return dispatch_pipeline (vm, node, frame);
}
VLIB_REGISTER_NODE (cnat_ipv4_udp_inside_input_exc_node) = {
.function = cnat_ipv4_udp_inside_input_exc_node_fn,
.name = "vcgn-v4-udp-i2o-e",
.vector_size = sizeof (u32),
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(cnat_ipv4_udp_inside_input_exc_error_strings),
.error_strings = cnat_ipv4_udp_inside_input_exc_error_strings,
.n_next_nodes = CNAT_V4_UDP_INSIDE_INPUT_EXC_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
[CNAT_V4_UDP_I2O_T] = "ip4-input",
[CNAT_V4_UDP_I2O_D] = "error-drop",
},
};
clib_error_t *cnat_ipv4_udp_inside_input_exc_init (vlib_main_t *vm)
{
cnat_ipv4_udp_inside_input_exc_main_t * mp = &cnat_ipv4_udp_inside_input_exc_main;
mp->vlib_main = vm;
mp->vnet_main = vnet_get_main();
return 0;
}
VLIB_INIT_FUNCTION (cnat_ipv4_udp_inside_input_exc_init);
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