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, 342 insertions, 0 deletions

diff --git a/plugins/vcgn-plugin/vcgn/cnat_v4_functions.h b/plugins/vcgn-plugin/vcgn/cnat_v4_functions.h
new file mode 100644
index 00000000000..2429e5e1437
--- /dev/null
+++ b/plugins/vcgn-plugin/vcgn/cnat_v4_functions.h
@@ -0,0 +1,342 @@
+/*
+ *------------------------------------------------------------------
+ * cnat_v4_functions.h  
+ *
+ * Copyright (c) 2007-2013 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.
+ *------------------------------------------------------------------
+ */
+
+#ifndef __CNAT_V4_FUNCTOINS__
+#define __CNAT_V4_FUNCTOINS__
+
+#include "tcp_header_definitions.h"
+#include "cnat_db.h"
+#include "spp_ctx.h"
+
+#include "platform_common.h"
+
+/*
+ * Defines and structures to enable TCP packet logging 
+ */
+#define TCP_LOGGING_DISABLE      0
+#define TCP_LOGGING_ENABLE       1
+#define TCP_LOGGING_PACKET_DUMP  2
+#define TCP_LOGGING_SUMMARY_DUMP 3
+
+#define MAX_TCP_LOGGING_COUNT 1024
+
+typedef struct tcp_logging_struct {
+    u32 seq_num;
+    u32 ack_num;
+    u32 old_ip;
+    u32 new_ip;
+    u16 old_port;
+    u16 new_port;
+    u16 old_ip_crc;
+    u16 new_ip_crc;
+    u16 old_tcp_crc;
+    u16 new_tcp_crc;
+} tcp_logging_struct_t;
+
+void tcp_debug_logging_dump (void);
+void tcp_debug_logging_enable_disable (u32 enable_flag);
+
+void
+tcp_debug_logging (
+    u32 seq_num,
+    u32 ack_num,
+    u32 old_ip,
+    u32 new_ip,
+    u16 old_port,
+    u16 new_port,
+    u16 old_ip_crc,
+    u16 new_ip_crc,
+    u16 old_tcp_crc,
+    u16 new_tcp_crc);
+
+#define JLI printf("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__); fflush(stdout);
+
+#define CNAT_ICMP_DEST_UNREACHABLE 100
+#define INCREMENT_NODE_COUNTER(c) \
+    em->counters[node_counter_base_index + c] += 1;
+
+#define V4_TCP_UPDATE_SESSION_FLAG(db, tcp) \
+if ((tcp->flags & TCP_FLAG_ACK) && (tcp->flags & TCP_FLAG_SYN)) { \
+     db->flags |= CNAT_DB_FLAG_TCP_ACTIVE; \
+} \
+if ((tcp->flags & TCP_FLAG_RST) || (tcp->flags & TCP_FLAG_FIN)) { \
+     db->flags &= ~CNAT_DB_FLAG_TCP_ACTIVE; \
+     db->flags |= CNAT_DB_FLAG_TCP_CLOSING; \
+} 
+
+#define V4_TCP_UPDATE_SESSION_DB_FLAG(sdb, tcp) \
+if ((tcp->flags & TCP_FLAG_ACK) && (tcp->flags & TCP_FLAG_SYN)) { \
+     sdb->flags |= CNAT_DB_FLAG_TCP_ACTIVE; \
+} \
+if ((tcp->flags & TCP_FLAG_RST) || (tcp->flags & TCP_FLAG_FIN)) { \
+     sdb->flags &= ~CNAT_DB_FLAG_TCP_ACTIVE; \
+     sdb->flags |= CNAT_DB_FLAG_TCP_CLOSING; \
+} 
+
+/*
+ * Code to recalculate checksum after ACK/SEQ number changes
+ * This macro assumes, we have pointer to tcp structure
+ * referenced by the name "tcp"
+ */
+#define CNAT_UPDATE_TCP_SEQ_ACK_CHECKSUM(old_val32, new_val32) \
+{                                                              \
+    u16 old_val_lower, old_val_upper, old_tcp_cr;              \
+    u16 new_val_lower, new_val_upper, new_tcp_cr;              \
+    u32 sum32;                                                 \
+                                                               \
+    old_val_lower = ~((u16) old_val32);                        \
+    old_val_upper = ~((u16) (old_val32 >> 16));                \
+    old_tcp_cr    = ~net2host16(&tcp->tcp_checksum);           \
+    new_val_lower = (u16) new_val32;                           \
+    new_val_upper = (u16) (new_val32 >> 16);                   \
+                                                               \
+    sum32 = old_val_lower + old_val_upper + old_tcp_cr +       \
+            new_val_lower + new_val_upper;                     \
+                                                               \
+    sum32 = (sum32 & 0xffff) + ((sum32 >> 16) & 0xffff);       \
+    sum32 = (sum32 & 0xffff) + ((sum32 >> 16) & 0xffff);       \
+    new_tcp_cr = ~((u16)sum32);                                \
+                                                               \
+    tcp->tcp_checksum = host2net16(new_tcp_cr);                \
+}
+
+/*
+ * newchecksum = ~(~oldchecksum + ~old + new)
+ * old/new for l3 checksum:  ip address
+ */
+#define CNAT_UPDATE_L3_CHECKSUM_DECLARE \
+u16  old_l3_1r, old_l3_2r; \
+u16  old_l3_cr, new_l3_c; \
+u32  new32;
+
+#define CNAT_UPDATE_L3_CHECKSUM(old_l3_1, old_l3_2, old_l3_c,  \
+                                new_l3_1, new_l3_2) \
+old_l3_1r = ~(old_l3_1); \
+old_l3_2r = ~(old_l3_2); \
+old_l3_cr = ~(old_l3_c); \
+new32 = old_l3_cr + old_l3_1r + old_l3_2r + new_l3_1 + new_l3_2; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_l3_c = ~((u16)new32); 
+
+
+/*
+ * newchecksum = ~(~oldchecksum + ~old + new)
+ * old/new for l3 checksum:  ip address
+ * old/new for l4 checksum:  ip address and port
+ */
+#define CNAT_UPDATE_L3_L4_CHECKSUM_DECLARE \
+u16  old_l3_1r, old_l3_2r, old_l4r; \
+u16  old_l3_cr, old_l4_cr; \
+u16  new_l3_c, new_l4_c; \
+u32  sum32, new32;
+
+#define CNAT_UPDATE_L3_L4_CHECKSUM(old_l3_1, old_l3_2, old_l4, \
+                                   old_l3_c, old_l4_c, \
+                                   new_l3_1, new_l3_2, new_l4) \
+old_l3_1r = ~(old_l3_1); \
+old_l3_2r = ~(old_l3_2); \
+old_l3_cr = ~(old_l3_c); \
+sum32 = old_l3_1r + old_l3_2r + new_l3_1 + new_l3_2; \
+new32 = old_l3_cr + sum32; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_l3_c = ~((u16)new32); \
+old_l4r = ~(old_l4); \
+old_l4_cr = ~(old_l4_c); \
+sum32 += old_l4r + new_l4; \
+new32 = old_l4_cr + sum32; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_l4_c = ~((u16)new32);
+
+/*
+ * For ICMP checksums, we don't use the top IP header for checksum calculation
+ */
+#define CNAT_UPDATE_L3_ICMP_CHECKSUM(old_l3_1, old_l3_2, old_l4, \
+                                     old_l3_c, old_l4_c, \
+                                     new_l3_1, new_l3_2, new_l4) \
+old_l3_1r = ~(old_l3_1); \
+old_l3_2r = ~(old_l3_2); \
+old_l3_cr = ~(old_l3_c); \
+sum32 = old_l3_1r + old_l3_2r + new_l3_1 + new_l3_2; \
+new32 = old_l3_cr + sum32; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_l3_c = ~((u16)new32); \
+old_l4r = ~(old_l4); \
+old_l4_cr = ~(old_l4_c); \
+sum32 = old_l4r + new_l4; \
+new32 = old_l4_cr + sum32; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_l4_c = ~((u16)new32);
+
+
+/*
+ * icmp error type message:
+ * newchecksum = ~(~oldchecksum + ~old + new)
+ * old/new for outlayer ip checksum: ip address
+ * old/new for outlayer icmp checksum: 
+ *    out-layer: ip address
+ *    inner-layer: ip addr, port, l3 checksum, l4 checksum
+ */
+#define CNAT_UPDATE_ICMP_ERR_CHECKSUM_DECLARE \
+u16  old_ip_1r, old_ip_2r, old_ip_port_r, old_ip_cr, old_icmp_cr; \
+u16  new_icmp_c; \
+u32  sum32;
+
+
+#define CNAT_UPDATE_ICMP_ERR_CHECKSUM(old_ip_1, old_ip_2, old_ip_port, old_ip_c, old_icmp_c, \
+                                      new_ip_1, new_ip_2, new_ip_port, new_ip_c) \
+old_ip_1r     = ~(old_ip_1); \
+old_ip_2r     = ~(old_ip_2); \
+old_ip_port_r = ~(old_ip_port); \
+old_ip_cr     = ~(old_ip_c); \
+old_icmp_cr   = ~(old_icmp_c); \
+sum32 = old_ip_1r + old_ip_2r + new_ip_1 + new_ip_2 + \
+        old_ip_port_r + new_ip_port + old_ip_cr + new_ip_c; \
+new32 = old_icmp_cr + sum32; \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new32 = (new32 & 0xffff) + ((new32 >> 16) & 0xffff); \
+new_icmp_c = ~((u16)new32); \
+
+/*
+ * Add the two 16 bit parts of the 32 bit field
+ * Repeat it one more time to take care of any overflow
+ * Complement the u16 value and store it in network format
+ */
+#define FILL_CHECKSUM(checksum_field, sum32) {                         \
+    sum32 = (sum32 & 0xffff) + ((sum32>>16) & 0xffff);                 \
+    sum32 = (sum32 & 0xffff) + ((sum32>>16) & 0xffff);                 \
+    checksum_field = clib_host_to_net_u16(~((u16) sum32));    \
+}
+
+static inline void
+cnat_v4_recalculate_tcp_checksum (ipv4_header *ip,
+				  tcp_hdr_type *tcp,
+                                  u32 *ip_addr_ptr,
+                                  u16 *tcp_port_addr_ptr,
+				  u32 new_ip,
+				  u16 new_port)
+{
+    u32 old_ip_addr, old_ip32_r, new_ip32, sum32;
+    u16 old_port_r, old_ip_checksum_r, old_tcp_checksum_r;
+
+    u16 *p16;
+
+    p16 = (u16*) ip_addr_ptr;
+
+    old_ip_addr = *ip_addr_ptr;
+    old_ip32_r = (((u16) ~clib_net_to_host_u16(*p16)) +
+                  ((u16) ~clib_net_to_host_u16(*(p16+1))));
+
+    old_port_r = ~clib_net_to_host_u16(*tcp_port_addr_ptr);
+
+    *ip_addr_ptr       = clib_host_to_net_u32(new_ip);
+
+    new_ip32 = (new_ip & 0xffff) + ((new_ip >> 16) & 0xffff);
+
+    old_ip_checksum_r  = ~clib_net_to_host_u16(ip->checksum);
+
+    /*
+     * Recalculate the new IP checksum
+     */
+    sum32 = old_ip32_r + new_ip32 + old_ip_checksum_r;
+
+    FILL_CHECKSUM(ip->checksum, sum32);
+
+    u16 frag_offset =
+            clib_net_to_host_u16((ip->frag_flags_offset));
+
+    if(PREDICT_FALSE(frag_offset & IP_FRAG_OFFSET_MASK)) {
+        return; /* No need to update TCP fields */
+    }
+    
+    *tcp_port_addr_ptr = clib_host_to_net_u16(new_port);
+    old_tcp_checksum_r = ~clib_net_to_host_u16(tcp->tcp_checksum);
+
+    /*
+     * Recalculate the new TCP checksum
+     */
+    sum32 = old_ip32_r + new_ip32 +
+            old_port_r + new_port + old_tcp_checksum_r;
+
+    FILL_CHECKSUM(tcp->tcp_checksum, sum32);
+
+    if (PREDICT_FALSE(tcp_logging_enable_flag)) {
+        tcp_debug_logging(
+	    clib_net_to_host_u32(tcp->seq_num),
+	    clib_net_to_host_u32(tcp->ack_num),
+	    clib_net_to_host_u32(old_ip_addr),
+	    clib_net_to_host_u32(*ip_addr_ptr),
+	    ~old_port_r,
+	    clib_net_to_host_u16(*tcp_port_addr_ptr),
+	    ~old_ip_checksum_r,
+	    clib_net_to_host_u16(ip->checksum),
+	    ~old_tcp_checksum_r,
+	    clib_net_to_host_u16(tcp->tcp_checksum));
+    }
+}
+
+
+extern void tcp_in2out_nat_mss_n_checksum (ipv4_header *ip,
+                                      tcp_hdr_type *tcp,
+                                      u32 ipv4_addr,
+                                      u16 port,
+                                      cnat_main_db_entry_t * db);
+
+void hex_dump(u8 * p, int len);
+
+u32 get_my_svi_intf_ip_addr();
+
+/* 
+ * in cnat_v4_icmp_gen.c,
+ * return 1 if icmp msg allow to generate
+ * for this user
+ */
+
+u32 icmp_msg_gen_allowed ();
+
+cnat_icmp_msg_t v6_icmp_msg_gen_allowed();
+
+int v4_crc_zero_udp_allowed();
+void ipv4_decr_ttl_n_calc_csum(ipv4_header *ipv4);
+int icmpv4_generate_with_throttling (spp_ctx_t *ctx, ipv4_header *ipv4,
+                                     u16 rx_uidb_index);
+                                            
+int icmpv6_generate_with_throttling (spp_ctx_t *ctx, ipv6_header_t *ipv4,
+                                     u16 rx_uidb_index);
+                                            
+void icmp_error_generate_v6(spp_ctx_t *ctx, u8 icmp_type,
+                            u8 icmp_code, u16 uidb_index);
+
+void calculate_window_scale(tcp_hdr_type *tcp_header, u8 *scale);
+
+void cnat_log_nat44_tcp_seq_mismatch(
+                   cnat_main_db_entry_t *db,
+		   cnat_vrfmap_t *vrfmap);
+void print_icmp_pkt (ipv4_header *ip);
+void print_udp_pkt (ipv4_header *ip);
+void print_tcp_pkt (ipv4_header *ip);
+void print_ipv6_pkt (ipv6_header_t *ip);
+
+
+#endif
+