diff options
Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_ports.h')
| -rw-r--r-- | plugins/vcgn-plugin/vcgn/cnat_ports.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_ports.h b/plugins/vcgn-plugin/vcgn/cnat_ports.h new file mode 100644 index 00000000000..bc1fb0d24a8 --- /dev/null +++ b/plugins/vcgn-plugin/vcgn/cnat_ports.h @@ -0,0 +1,208 @@ +/* + *------------------------------------------------------------------ + * cnat_ports.h - port database definitions + * + * 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_PORTS_H__ +#define __CNAT_PORTS_H__ + +#include "platform_common.h" +#include "cnat_bulk_port_defs.h" + +#define PORTS_PER_ADDR 65536 + +#define CNAT_INSTS PLATFORM_CNAT_INSTS + +#define BITS_PER_INST (PORTS_PER_ADDR) + +/* + * Ensure that atleast few 4 bit ports are available for RTSP + * in case we want to map 4 digit inside ports to 4 digit outside ports + */ +#define MIN_STATIC_PORT_RANGE_FOR_RTSP (9900) + +extern u8 my_instance_number; + +/* + * Now it is a 1-to-1 mapping between bit and port values + */ +static inline u16 bit2port (u32 bit) +{ + return bit; +} + +static inline uword port2bit (u16 port) +{ + return port; +} + +/* + * Port bitmap structure + * THIS structure is not used to be REMOVED.... + */ + + +typedef struct { + u32 ipv4_address; /* native bit order */ + u16 vrf; + u16 pad; + u32 threshold_crossed; + uword bm[(BITS_PER_INST + BITS(uword)-1)/BITS(uword)]; +} cnat_portmap_t; + +//cnat_portmap_t *cnat_portmap; + + +typedef struct { + u32 inuse; + u32 delete_time; + u32 ipv4_address; /* native bit order */ + u32 last_sent_timestamp; + uword bm[(BITS_PER_INST + BITS(uword)-1)/BITS(uword)]; + u32 dyn_full; + u32 private_ip_users_count; /* number of private ip's(subscribers) to this + public ip */ +} cnat_portmap_v2_t; + + +typedef enum { + PORT_SINGLE=0, + PORT_PAIR=1, + PORT_S_EVEN=2, + PORT_S_ODD=3, +} port_pair_t; + +typedef enum { + PORT_TYPE_DYNAMIC=0, + PORT_TYPE_STATIC=1, + PORT_TYPE_RTSP=2, +} port_type_t; + + +typedef enum { + PORT_ALLOC_ANY=1, + PORT_ALLOC_DIRECTED=2, +} port_alloc_t; + +#define PORT_PROBE_LIMIT 20 + + +/* + * randq1 + * Linear congruential random number generator with + * extensively studied properties. See Numerical Recipes in C + * 2nd Ed. page 284. Known to behave according to the test vector + * supplied in the text, on X86 and Octeon. + */ +static inline u32 randq1 (u32 prev) +{ + return (1664525L*prev + 1013904223L); +} + +cnat_errno_t +cnat_static_port_alloc_v2( + cnat_portmap_v2_t *pm, + port_alloc_t atype, + port_pair_t pair_type, + u32 i_ipv4_address, + u16 i_port, + u32 *index, + u32 *o_ipv4_address, + u16 *o_port, + u16 static_port_range +#ifndef NO_BULK_LOGGING + , bulk_alloc_size_t bulk_size, + int *nfv9_log_req +#endif /* NO_BULK_LOGGING */ + , u16 ip_n_to_1 + ); + +cnat_errno_t +cnat_mapped_static_port_alloc_v2 ( + cnat_portmap_v2_t *pm, + port_alloc_t atype, + u32 *index, + u32 ipv4_address, + u16 port +#ifndef NO_BULK_LOGGING + , int *nfv9_log_req, + bulk_alloc_size_t bulk_size +#endif + , u16 ip_n_to_1 + ); + +cnat_errno_t +cnat_dynamic_port_alloc_v2( + cnat_portmap_v2_t *pm, + port_alloc_t atype, + port_pair_t pair_type, + u32 *index, + u32 *o_ipv4_address, + u16 *o_port, + u16 static_port_range +#ifndef NO_BULK_LOGGING + , bulk_alloc_size_t bulk_size, + int *nfv9_log_req +#endif + , u16 ip_n_to_1, + u32 *rseed_ip + ); + + +cnat_errno_t +cnat_dynamic_port_alloc_rtsp ( + cnat_portmap_v2_t *pm, + port_alloc_t atype, + port_pair_t pair_type, + u16 start_range, + u16 end_range, + u32 *index, + u32 *o_ipv4_address, + u16 *o_port +#ifndef NO_BULK_LOGGING + , bulk_alloc_size_t bulk_size, + int *nfv9_log_req +#endif + , u32 *rseed_ip + ); + +void cnat_port_free_v2( + cnat_portmap_v2_t *pm, + int index, + port_pair_t ptype, + u16 base_port, + u16 static_port_range); + +void cnat_portmap_dump_v2(cnat_portmap_v2_t *pm, + u16 print_limit); + + + +cnat_errno_t +nat64_static_port_alloc ( + cnat_portmap_v2_t *pm, + port_alloc_t atype, + port_pair_t pair_type, + u32 *i_ipv6_address, + u16 i_port, + u32 *index, + u32 *o_ipv4_address, + u16 *o_port); + + + +#endif /* __CNAT_PORTS_H__ */ |