diff options
| author |   Matus Fabian <matfabia@cisco.com> | 2017-11-06 05:04:53 -0800 |
|---|---|---|
| committer |   Ole Trøan <otroan@employees.org> | 2017-11-07 11:52:39 +0000 |
| commit | 8ebe62536223e5a8d827b2b870cbd57aa34fd7ef (patch) | |
| tree | f4ab30aa41a7a26bb6068e7f0f441930cc7774bb /src/plugins/nat/nat.c | |
| parent | 5917939256af392914d8a648de0c3287042ddbf6 (diff) | |
NAT: DS-Lite (VPP-1040)
Dual-Stack Lite enables a broadband service provider to share IPv4 addresses among customers by combining two well-known technologies: IPv4-in-IPv6 and NAT.
Change-Id: I039740f8548c623cd1ac89b8ecda1a6cc4aafb9c
Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
| -rw-r--r-- | src/plugins/nat/nat.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c index 189c5940d9c..cd5a6eb8fa8 100644 --- a/src/plugins/nat/nat.c +++ b/src/plugins/nat/nat.c @@ -23,6 +23,7 @@ #include <nat/nat_ipfix_logging.h> #include <nat/nat_det.h> #include <nat/nat64.h> +#include <nat/dslite.h> #include <vnet/fib/fib_table.h> #include <vnet/fib/ip4_fib.h> @@ -1448,12 +1449,14 @@ static clib_error_t * snat_init (vlib_main_t * vm) error = nat64_init(vm); + dslite_init(vm); + return error; } VLIB_INIT_FUNCTION (snat_init); -void snat_free_outside_address_and_port (snat_main_t * sm, +void snat_free_outside_address_and_port (snat_address_t * addresses, u32 thread_index, snat_session_key_t * k, u32 address_index) @@ -1461,9 +1464,9 @@ void snat_free_outside_address_and_port (snat_main_t * sm, snat_address_t *a; u16 port_host_byte_order = clib_net_to_host_u16 (k->port); - ASSERT (address_index < vec_len (sm->addresses)); + ASSERT (address_index < vec_len (addresses)); - a = sm->addresses + address_index; + a = addresses + address_index; switch (k->protocol) { @@ -1572,38 +1575,42 @@ int snat_static_mapping_match (snat_main_t * sm, } static_always_inline u16 -snat_random_port (snat_main_t * sm, u16 min, u16 max) +snat_random_port (u16 min, u16 max) { + snat_main_t *sm = &snat_main; return min + random_u32 (&sm->random_seed) / (random_u32_max() / (max - min + 1) + 1); } -int snat_alloc_outside_address_and_port (snat_main_t * sm, +int snat_alloc_outside_address_and_port (snat_address_t * addresses, u32 fib_index, u32 thread_index, snat_session_key_t * k, - u32 * address_indexp) + u32 * address_indexp, + u8 vrf_mode, + u16 port_per_thread, + u32 snat_thread_index) { int i; snat_address_t *a; u32 portnum; - for (i = 0; i < vec_len (sm->addresses); i++) + for (i = 0; i < vec_len (addresses); i++) { - a = sm->addresses + i; - if (sm->vrf_mode && a->fib_index != ~0 && a->fib_index != fib_index) + a = addresses + i; + if (vrf_mode && a->fib_index != ~0 && a->fib_index != fib_index) continue; switch (k->protocol) { #define _(N, j, n, s) \ case SNAT_PROTOCOL_##N: \ - if (a->busy_##n##_ports_per_thread[thread_index] < sm->port_per_thread) \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ { \ while (1) \ { \ - portnum = (sm->port_per_thread * \ - sm->per_thread_data[thread_index].snat_thread_index) + \ - snat_random_port(sm, 1, sm->port_per_thread) + 1024; \ + portnum = (port_per_thread * \ + snat_thread_index) + \ + snat_random_port(1, port_per_thread) + 1024; \ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \ continue; \ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \ |