diff options
Diffstat (limited to 'src/plugins/sixrd/sixrd.h')
| -rw-r--r-- | src/plugins/sixrd/sixrd.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/plugins/sixrd/sixrd.h b/src/plugins/sixrd/sixrd.h new file mode 100644 index 00000000..56714c9e --- /dev/null +++ b/src/plugins/sixrd/sixrd.h @@ -0,0 +1,141 @@ +/*--------------------------------------------------------------------------- + * 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 <stdbool.h> +#include <vppinfra/error.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/fib/ip6_fib.h> + +#include "sixrd_dpo.h" + +int sixrd_create_domain(ip6_address_t *ip6_prefix, u8 ip6_prefix_len, + ip4_address_t *ip4_prefix, u8 ip4_prefix_len, + ip4_address_t *ip4_src, u32 *sixrd_domain_index, u16 mtu); +int sixrd_delete_domain(u32 sixrd_domain_index); +u8 *format_sixrd_trace(u8 *s, va_list *args); + +typedef struct { + ip6_address_t ip6_prefix; + ip4_address_t ip4_prefix; + ip4_address_t ip4_src; + u8 ip6_prefix_len; + u8 ip4_prefix_len; + + /* helpers */ + u8 shift; + + u16 mtu; +} sixrd_domain_t; + +typedef struct { + /* pool of SIXRD domains */ + sixrd_domain_t *domains; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} sixrd_main_t; + +#define foreach_sixrd_error \ + /* Must be first. */ \ + _(NONE, "valid SIXRD packets") \ + _(BAD_PROTOCOL, "bad protocol") \ + _(WRONG_ICMP_TYPE, "wrong icmp type") \ + _(SEC_CHECK, "security check failed") \ + _(ICMP, "unable to translate ICMP") \ + _(UNKNOWN, "unknown") \ + _(NO_DOMAIN, "no domain") \ + _(ENCAPSULATED, "encapsulated") \ + _(DECAPSULATED, "decapsulated") \ + _(TRANSLATED_4TO6, "translated 4 to 6") \ + _(TRANSLATED_6TO4, "translated 6 to 4") \ + _(FRAGMENT, "fragment handling error") \ + _(FRAGMENT_QUEUED, "dropped, missing first fragment") \ + _(FRAGMENTED, "packets requiring fragmentation") \ + _(FRAGMENT_PARTS, "fragment parts") \ + _(MALFORMED, "malformed packet") + +typedef enum { +#define _(sym,str) SIXRD_ERROR_##sym, + foreach_sixrd_error +#undef _ + SIXRD_N_ERROR, + } sixrd_error_t; + +typedef struct { + u32 sixrd_domain_index; +} sixrd_trace_t; + +sixrd_main_t sixrd_main; + +/* + * sixrd_get_addr + */ +static_always_inline u32 +sixrd_get_addr (sixrd_domain_t *d, u64 dal) +{ + + /* 1:1 mode */ + if (d->ip4_prefix_len == 32) return (d->ip4_prefix.as_u32); + + /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset ip6_prefix_len */ + return (d->ip4_prefix.as_u32 | (u32)(dal >> d->shift)); +} + +/* + * Get the SIXRD domain from an IPv6 lookup adjacency. + */ +static_always_inline sixrd_domain_t * +ip6_sixrd_get_domain (u32 sdi, u32 *sixrd_domain_index) +{ + sixrd_main_t *mm = &sixrd_main; + sixrd_dpo_t *sd; + + sd = sixrd_dpo_get(sdi); + + ASSERT(sd); + *sixrd_domain_index = sd->sd_domain; + return pool_elt_at_index(mm->domains, *sixrd_domain_index); +} + +/* + * Get the SIXRD domain from an IPv4 lookup adjacency. + * If the IPv4 address is not shared, no lookup is required. + * The IPv6 address is used otherwise. + */ +static_always_inline sixrd_domain_t * +ip4_sixrd_get_domain (u32 sdi, ip6_address_t *addr, + u32 *sixrd_domain_index, u8 *error) +{ + sixrd_main_t *mm = &sixrd_main; + sixrd_dpo_t *sd; + + sd = sixrd_dpo_get(sdi); + *sixrd_domain_index = sd->sd_domain; + if (*sixrd_domain_index != ~0) + return pool_elt_at_index(mm->domains, *sixrd_domain_index); + + u32 lbi = ip6_fib_table_fwding_lookup(&ip6_main, 0, addr); + const dpo_id_t *dpo = load_balance_get_bucket(lbi, 0); + if (PREDICT_TRUE(dpo->dpoi_type == sixrd_dpo_type)) + { + sd = sixrd_dpo_get(dpo->dpoi_index); + *sixrd_domain_index = sd->sd_domain; + return pool_elt_at_index(mm->domains, *sixrd_domain_index); + } + *error = SIXRD_ERROR_NO_DOMAIN; + return NULL; +} |