Plugins: Clean up the plugin directory so that each plugin has its own

directory and GNU autotools setup.

Change-Id: I6c59d1297389c9413db0c0b9bdf3b759080bf1b8
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 493 insertions, 0 deletions

diff --git a/plugins/vcgn-plugin/vcgn/cnat_db_scanner.c b/plugins/vcgn-plugin/vcgn/cnat_db_scanner.c
new file mode 100644
index 00000000000..6e536d84c79
--- /dev/null
+++ b/plugins/vcgn-plugin/vcgn/cnat_db_scanner.c
@@ -0,0 +1,493 @@
+/*
+ *---------------------------------------------------------------------------
+ * cnat_db_scanner.c - cnat_db_scanner dispatch function and initialization
+ *
+ * Copyright (c) 2009-2014 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 <vppinfra/string.h>
+#include <vppinfra/random.h>
+#include <vppinfra/fifo.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/format.h>
+
+
+#include "cnat_db.h"
+#include "cnat_logging.h"
+#include "cnat_global.h"
+#include "cnat_ipv4_udp.h"
+#include "cnat_common_api.h"
+
+u32 translation_create_count, translation_delete_count;
+u32 translation_create_rate, translation_delete_rate;
+
+u32 in2out_forwarding_count, out2in_forwarding_count;
+u32 in2out_forwarding_rate,  out2in_forwarding_rate;
+
+u32 nat44_active_translations;
+u32 num_entries;
+uword check_these_pool_indices[2*MAX_DB_ENTRY_SELECTED_PER_SCAN];
+
+#define   CNAT_DB_SCANNER_TURN_ON   5  /* just an arbitary number for easier debugging */
+
+//extern u32 pcp_throttle_count;
+
+typedef struct {
+  u32 cached_next_index;
+  /* $$$$ add data here */
+
+  /* convenience variables */
+  vlib_main_t * vlib_main;
+  vnet_main_t * vnet_main;
+} cnat_db_scanner_main_t;
+
+cnat_db_scanner_main_t cnat_db_scanner_main;
+
+
+static inline void check_session_for_expiry(
+    	cnat_session_entry_t * sdb, u8 timeout_dirty
+	/*,dslite_table_entry_t *dslite_entry_ptr*/)
+{
+    void cnat_delete_session_db_entry (cnat_session_entry_t *ep, u8 log);
+    /* Tasks -
+     * 1. Check for expiry for this entry
+     * 2. Delete if expired
+     */
+    u32 timeout = 0;
+
+    switch(sdb->v4_dest_key.k.vrf & CNAT_PRO_MASK) {
+        case CNAT_TCP:
+            if (sdb->flags & CNAT_DB_FLAG_TCP_ACTIVE) {    
+                timeout = sdb->timeout;
+                if(PREDICT_FALSE(timeout_dirty)) {
+                    timeout = query_and_update_db_timeout(
+                        (void *)sdb, SESSION_DB_TYPE);
+                }
+                if(PREDICT_TRUE(timeout == 0)) {
+                    timeout = tcp_active_timeout;
+                    //dslite_entry_ptr->timeout_info.tcp_active_timeout;
+                }
+            } else {
+                timeout = tcp_initial_setup_timeout;
+                //dslite_entry_ptr->timeout_info.tcp_initial_setup_timeout;
+            }
+            break;
+        case CNAT_UDP:
+            if (sdb->flags & CNAT_DB_FLAG_UDP_ACTIVE) {
+                timeout = sdb->timeout;
+                if(PREDICT_FALSE(timeout_dirty)) {
+                    timeout = query_and_update_db_timeout(
+                        (void *)sdb, SESSION_DB_TYPE);
+                }
+
+                if(PREDICT_TRUE(timeout == 0)) {
+                    timeout = udp_act_session_timeout;
+                    //dslite_entry_ptr->timeout_info.udp_act_session_timeout;
+                }
+            } else {
+                timeout = udp_init_session_timeout;
+                //dslite_entry_ptr->timeout_info.udp_init_session_timeout;
+            }
+            break;
+        case CNAT_ICMP:
+            timeout = icmp_session_timeout;
+                //dslite_entry_ptr->timeout_info.icmp_session_timeout;
+            break;
+        case CNAT_PPTP:
+            timeout = pptp_cfg.timeout;
+            break;
+        default:
+            return;
+    }
+    /* Changes required for clearing sessions */
+    if (PREDICT_FALSE((sdb->entry_expires == 0) ||
+                        (sdb->entry_expires + timeout < cnat_current_time))) {
+        cnat_delete_session_db_entry(sdb, TRUE);
+    }
+}
+
+static u8 handle_db_scan_for_sessions(
+    	cnat_main_db_entry_t *db, int *dirty_index, uword db_index
+    	/* ,dslite_table_entry_t *dslite_entry_ptr */)
+{
+    /* Tasks -
+     * 1. Traverse through the sessions and check for timeouts
+     * 2. Delete sessions that have exipred
+     * 3. Check if the db has only one session remaining.. if so,
+     *    the details of the session has to be moved to main db
+     *    and session db entry needs to be freed
+     * 4. If db does not have any sessions left, the db itself
+     *    needs to be deleted.
+     */
+    u32 nsessions, session_index_head, session_index;
+    cnat_session_entry_t *sdb;
+    u8 timeout_dirty = FALSE;
+
+    if(PREDICT_FALSE(*dirty_index == db_index)) {
+        *dirty_index = -1;
+    }
+    if(PREDICT_FALSE(timeout_dirty_flag == 1)) {
+        timeout_dirty_flag = 0;
+        *dirty_index = db_index;
+        timeout_dirty = TRUE;
+    }
+
+    session_index_head = session_index = db->session_head_index;
+    nsessions = db->nsessions;
+
+    do {
+        sdb = cnat_session_db + session_index;
+        if(PREDICT_FALSE(!sdb)) {
+            //TO DO: Debug msg?
+            return FALSE;
+        }
+        session_index = sdb->main_list.next;
+        check_session_for_expiry(sdb, timeout_dirty /*,dslite_entry_ptr*/);
+        nsessions--; /* To ensure that we do not get in to an infinite loop */
+      } while(session_index != session_index_head
+          && db->session_head_index != EMPTY &&
+          nsessions);
+
+    /* Note.. the code below assumes that while deleting the
+     * sessions, we do not delete the main db entry if it does
+     * not have any sessions anymore
+     */
+    if(PREDICT_FALSE((!db->nsessions) &&
+        (!(db->flags & CNAT_DB_FLAG_STATIC_PORT)))) {
+         cnat_delete_main_db_entry_v2(db);
+         return TRUE; /* to indicate that main db was deleted */
+    }
+    return FALSE;
+}
+
+static void cnat_db_scanner(void)
+{
+    cnat_main_db_entry_t * db;
+    u32 timeout;
+    cnat_vrfmap_t *my_vrfmap __attribute__((unused)) = 0;
+    static int dirty_index = -1;
+    u16 instance __attribute__((unused));
+    //dslite_table_entry_t *dslite_entry_ptr;
+    u32 i;
+    uword db_index;
+    //pcp_throttle_count = 0;
+
+    for (i = 0; i < num_entries; i++) {
+        db_index = check_these_pool_indices[i];
+        db = cnat_main_db + db_index;
+        timeout=0;
+        my_vrfmap = 0;
+
+#if 0
+        if(PREDICT_FALSE(db->flags & CNAT_PCP_FLAG)) {
+    
+            if(db->proto_data.seq_pcp.pcp_lifetime < cnat_current_time) {
+                /* mark as implicit */
+                db->flags &= ~CNAT_PCP_FLAG;
+            }
+            continue;
+        }
+
+#endif
+        if(PREDICT_FALSE(db->nsessions > 1)) {
+            if(PREDICT_FALSE(
+                handle_db_scan_for_sessions(db, &dirty_index, db_index /*,dslite_entry_ptr */)))            {
+                continue;
+            } else if(PREDICT_TRUE(db->nsessions > 1)) {
+                continue;
+            }
+            /* if there is exactly one dest left.. let it fall through
+            * and check if that needs to be deleted as well
+            */
+        }
+
+#if 0 
+        if (PREDICT_FALSE(db->flags & CNAT_DB_FLAG_STATIC_PORT)) {
+            if (PREDICT_FALSE(db->flags & CNAT_DB_DSLITE_FLAG)) {
+	        if(PREDICT_FALSE(
+                    ((dslite_entry_ptr->nf_logging_policy != SESSION_LOG_ENABLE) &&
+                    (dslite_entry_ptr->syslog_logging_policy != SESSION_LOG_ENABLE))
+                    || (db->nsessions !=1))) {
+                     continue;
+	        }
+            } else {
+	        my_vrfmap = cnat_map_by_vrf + db->vrfmap_index;
+                if(PREDICT_FALSE(
+                    ((my_vrfmap->nf_logging_policy != SESSION_LOG_ENABLE) &&
+                     (my_vrfmap->syslog_logging_policy != SESSION_LOG_ENABLE)) ||
+                    (db->nsessions !=1))) {
+                    continue;
+                } 	
+	    }
+        }
+#endif
+
+        switch(db->in2out_key.k.vrf & CNAT_PRO_MASK) {
+            case CNAT_TCP:
+                if (db->flags & CNAT_DB_FLAG_TCP_ACTIVE) {
+                    timeout = db->timeout;
+                    if(PREDICT_FALSE(dirty_index == db_index)) {
+                        dirty_index = -1;
+                    }
+                    if(PREDICT_FALSE(timeout_dirty_flag == 1)) {
+                        timeout_dirty_flag = 0;
+                        dirty_index = db_index;
+                    }
+                    if(PREDICT_FALSE(dirty_index != -1)) {
+                        timeout = query_and_update_db_timeout(
+                            (void *)db, MAIN_DB_TYPE);
+                    }
+                    if(PREDICT_TRUE(timeout == 0)) {
+                        timeout = tcp_active_timeout;
+                    }
+                } else {
+                    timeout = tcp_initial_setup_timeout;
+                }
+                break;
+            case CNAT_UDP:
+                if (db->flags & CNAT_DB_FLAG_UDP_ACTIVE) {
+                    timeout = db->timeout;
+                    if(PREDICT_FALSE(dirty_index == db_index)) {
+                        dirty_index = -1;
+                    }
+                    if(PREDICT_FALSE(timeout_dirty_flag == 1)) {
+                        timeout_dirty_flag = 0;
+                        dirty_index = db_index;
+                    }
+                    if(PREDICT_FALSE(dirty_index != -1)) {
+                        timeout = query_and_update_db_timeout(
+                            (void *)db, MAIN_DB_TYPE);
+                    }
+                    if(PREDICT_TRUE(timeout == 0)) {
+                        timeout = udp_act_session_timeout;
+                    }
+                } else {
+                    timeout = udp_init_session_timeout;
+                }
+                break;
+            case CNAT_ICMP:
+                timeout = icmp_session_timeout;
+                break;
+            case CNAT_PPTP:
+                timeout = pptp_cfg.timeout;
+                break;
+            default:
+                continue;
+        }
+
+
+        /* Ref: CSCtu97536 */
+        if (PREDICT_FALSE((db->entry_expires  == 0) || 
+                    (db->entry_expires + timeout < cnat_current_time))) {
+#if 0
+	    if (PREDICT_FALSE(db->flags & CNAT_DB_FLAG_STATIC_PORT)) {
+    	        if (PREDICT_FALSE(db->flags & CNAT_DB_DSLITE_FLAG)) {
+		    instance = db->dslite_nat44_inst_id;
+    	        } else {
+		    instance = NAT44_RESERVED_INST_ID;
+                    cnat_session_log_nat44_mapping_delete(db, 0, my_vrfmap);
+	        }
+
+                /* Reset the session details */
+                db->nsessions = 0;
+                db->dst_ipv4 = 0;
+                db->dst_port = 0;
+                db->flags &= ~(CNAT_DB_FLAG_TCP_ACTIVE | CNAT_DB_FLAG_UDP_ACTIVE
+                        | CNAT_DB_FLAG_ALG_ENTRY);
+                db->timeout = 0;
+                db->entry_expires = 0;
+                db->alg.delta = 0;
+                db->proto_data.seq_pcp.tcp_seq_num = 0;
+                continue;
+            }
+#endif
+            //printf("DELETING DB ENTRY FOR 0x%x\n", db->in2out_key.k.ipv4);
+            cnat_delete_main_db_entry_v2(db);
+        }
+        //free(check_these_pool_indices[i]);
+    }
+}
+
+static void walk_the_db (void)
+{
+    pool_header_t *h = pool_header(cnat_main_db);
+    u32 db_uword_len;
+    static u32 base_index = 0, free_bitmap_index = 0;
+    int bits_scanned = 0, i;
+    uword inuse_bitmap;
+
+    num_entries=0;
+    
+    /* Across all db entries... */
+    db_uword_len = vec_len(cnat_main_db) / NUM_BITS_IN_UWORD;
+    if (PREDICT_FALSE(vec_len(cnat_main_db) % NUM_BITS_IN_UWORD)) {
+        /*
+         * It should not come here as in cnat_db_init_v2()
+         * it is made multiple of NUM_BITS_IN_UWORD
+         */
+        ASSERT(0);
+        return ;
+    }
+
+    if (PREDICT_FALSE(! db_uword_len))
+        return ;
+
+    while (bits_scanned < MAX_DB_ENTRY_PER_SCAN) {
+
+        if (PREDICT_FALSE(free_bitmap_index < vec_len(h->free_bitmap))) {
+
+            /* free_bitmap exists and it is not all 0 */
+
+            inuse_bitmap = ~(h->free_bitmap[free_bitmap_index]);
+            i = 0;
+            while (inuse_bitmap) {
+
+                /* Check to see if the index is in use */
+                if (PREDICT_FALSE((inuse_bitmap >> i) & 1)) {
+                    check_these_pool_indices[num_entries] = base_index + i;
+                    inuse_bitmap &= ~((uword) 1 << i);
+                    num_entries++;
+                }
+                i++;
+            } // while (inuse_bitmap)
+        } else {
+
+            /*
+             * 64-bit entry is 0, means all 64 entries are allocated.
+             * So, simply add all 64 entries here.
+             * No need to form inuse_bitmap, check and reset bits
+             */
+            for (i=0; i<NUM_BITS_IN_UWORD; i++) {
+
+                check_these_pool_indices[num_entries] = base_index + i;
+                num_entries++;
+            }
+        } // if (free_bitmap_index < vec_len(h->free_bitmap))
+
+        /* Update free_bitmap_index and base_index for next run */
+        if (PREDICT_FALSE(free_bitmap_index == db_uword_len - 1)) {
+            /* wrap-around for next run */
+            free_bitmap_index = 0;
+            base_index = 0;
+        } else {
+            free_bitmap_index ++;
+            base_index += NUM_BITS_IN_UWORD;
+        }
+
+        /* increment # of bits scanned */
+        bits_scanned += NUM_BITS_IN_UWORD;
+
+        /* Found enough entries to check ? */
+        if (PREDICT_FALSE(num_entries >= MAX_DB_ENTRY_SELECTED_PER_SCAN))
+        {
+            /* This check is introduced to keep fixed MAX scan entry value */
+            /* This is very much required when we do scanning for NAT64 */
+            /* please check comments in cnat_db_scanner() & 
+             * handler_nat64_db_scanner() */
+            if (num_entries >= MAX_COMBINED_DB_ENTRIES_PER_SCAN) {
+                num_entries = MAX_COMBINED_DB_ENTRIES_PER_SCAN;
+            }
+            break;
+        }
+
+    } // while (bits_scanned < MAX_DB_ENTRY_PER_SCAN)
+
+    if (PREDICT_FALSE(num_entries > 0)) {
+	//printf("%s: num_entries [%d]\n", __func__, num_entries);
+        cnat_db_scanner(); 
+    }
+    return ;
+}
+
+static uword cnat_db_scanner_fn (vlib_main_t * vm,
+                              vlib_node_runtime_t * node,
+                              vlib_frame_t * frame)
+{
+  f64 timeout = 0.01;  /* timeout value in sec (10 ms) */
+  static u8 timeout_count = 0;
+
+  uword event_type;
+  uword * event_data = 0;
+  /* Wait until vCGN is configured */
+  while (1) {
+      /* Assigning a huge timeout value, vCGN may or 
+       * may not get configured within this timeout  */
+      vlib_process_wait_for_event_or_clock (vm, 1e9);  
+      event_type = vlib_process_get_events (vm, &event_data);
+
+      /* check whether the process is waken up by correct guy, 
+       * otherwise continue waiting for the vCGN config */
+      if (event_type == CNAT_DB_SCANNER_TURN_ON) {
+          break;
+      } 
+  }
+
+  while(1) {
+    vlib_process_suspend(vm, timeout);
+    
+    /* Above suspend API should serve the purpose, no need to invoke wait API */
+    /* vlib_process_wait_for_event_or_clock (vm, timeout); */
+
+     /* Lets make use of this timeout for netflow packet sent */
+     if (timeout_count < 100) { /* 100*10 ms = 1 sec */
+         timeout_count++;
+     } else {
+         if (nfv9_configured) {
+             handle_pending_nfv9_pkts();
+         }
+         timeout_count = 0;
+     }
+     /* Do we need this ? */
+     //event_type = vlib_process_get_events (vm, &event_data);
+     cnat_current_time = (u32)vlib_time_now (vm);
+     if (cnat_db_init_done) {
+        walk_the_db();	
+     }
+  }
+
+  return 0;
+}
+
+
+VLIB_REGISTER_NODE (cnat_db_scanner_node) = {
+    .function = cnat_db_scanner_fn,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "cnat-db-scanner",
+    .process_log2_n_stack_bytes = 18,
+};
+
+clib_error_t *cnat_db_scanner_init (vlib_main_t *vm)
+{
+  cnat_db_scanner_main_t *mp = &cnat_db_scanner_main;
+
+  mp->vlib_main = vm;
+  mp->vnet_main = vnet_get_main();
+
+  return 0;
+}
+
+void cnat_scanner_db_process_turn_on(vlib_main_t *vm)
+{
+    vlib_process_signal_event (vm, cnat_db_scanner_node.index,
+                             CNAT_DB_SCANNER_TURN_ON, 0);
+    return; 
+}
+
+VLIB_INIT_FUNCTION (cnat_db_scanner_init);
+