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Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_inside_input_exceptions.c')
-rw-r--r--plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_inside_input_exceptions.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_inside_input_exceptions.c b/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_inside_input_exceptions.c
new file mode 100644
index 00000000..f078c8d4
--- /dev/null
+++ b/plugins/vcgn-plugin/vcgn/cnat_ipv4_udp_inside_input_exceptions.c
@@ -0,0 +1,283 @@
+/*
+ *---------------------------------------------------------------------------
+ * 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);
+