1 /*---------------------------------------------------------------------------
2 * Copyright (c) 2009-2014 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 *---------------------------------------------------------------------------
17 #include <vppinfra/error.h>
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/fib/ip6_fib.h>
22 #include "sixrd_dpo.h"
24 int sixrd_create_domain(ip6_address_t *ip6_prefix, u8 ip6_prefix_len,
25 ip4_address_t *ip4_prefix, u8 ip4_prefix_len,
26 ip4_address_t *ip4_src, u32 *sixrd_domain_index, u16 mtu);
27 int sixrd_delete_domain(u32 sixrd_domain_index);
28 u8 *format_sixrd_trace(u8 *s, va_list *args);
31 ip6_address_t ip6_prefix;
32 ip4_address_t ip4_prefix;
33 ip4_address_t ip4_src;
44 /* pool of SIXRD domains */
45 sixrd_domain_t *domains;
48 vlib_main_t *vlib_main;
49 vnet_main_t *vnet_main;
52 #define foreach_sixrd_error \
53 /* Must be first. */ \
54 _(NONE, "valid SIXRD packets") \
55 _(BAD_PROTOCOL, "bad protocol") \
56 _(WRONG_ICMP_TYPE, "wrong icmp type") \
57 _(SEC_CHECK, "security check failed") \
58 _(ICMP, "unable to translate ICMP") \
59 _(UNKNOWN, "unknown") \
60 _(NO_DOMAIN, "no domain") \
61 _(ENCAPSULATED, "encapsulated") \
62 _(DECAPSULATED, "decapsulated") \
63 _(TRANSLATED_4TO6, "translated 4 to 6") \
64 _(TRANSLATED_6TO4, "translated 6 to 4") \
65 _(FRAGMENT, "fragment handling error") \
66 _(FRAGMENT_QUEUED, "dropped, missing first fragment") \
67 _(FRAGMENTED, "packets requiring fragmentation") \
68 _(FRAGMENT_PARTS, "fragment parts") \
69 _(MALFORMED, "malformed packet")
72 #define _(sym,str) SIXRD_ERROR_##sym,
79 u32 sixrd_domain_index;
82 sixrd_main_t sixrd_main;
87 static_always_inline u32
88 sixrd_get_addr (sixrd_domain_t *d, u64 dal)
92 if (d->ip4_prefix_len == 32) return (d->ip4_prefix.as_u32);
94 /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset ip6_prefix_len */
95 return (d->ip4_prefix.as_u32 | (u32)(dal >> d->shift));
99 * Get the SIXRD domain from an IPv6 lookup adjacency.
101 static_always_inline sixrd_domain_t *
102 ip6_sixrd_get_domain (u32 sdi, u32 *sixrd_domain_index)
104 sixrd_main_t *mm = &sixrd_main;
107 sd = sixrd_dpo_get(sdi);
110 *sixrd_domain_index = sd->sd_domain;
111 return pool_elt_at_index(mm->domains, *sixrd_domain_index);
115 * Get the SIXRD domain from an IPv4 lookup adjacency.
116 * If the IPv4 address is not shared, no lookup is required.
117 * The IPv6 address is used otherwise.
119 static_always_inline sixrd_domain_t *
120 ip4_sixrd_get_domain (u32 sdi, ip6_address_t *addr,
121 u32 *sixrd_domain_index, u8 *error)
123 sixrd_main_t *mm = &sixrd_main;
126 sd = sixrd_dpo_get(sdi);
127 *sixrd_domain_index = sd->sd_domain;
128 if (*sixrd_domain_index != ~0)
129 return pool_elt_at_index(mm->domains, *sixrd_domain_index);
131 u32 lbi = ip6_fib_table_fwding_lookup(&ip6_main, 0, addr);
132 const dpo_id_t *dpo = load_balance_get_bucket(lbi, 0);
133 if (PREDICT_TRUE(dpo->dpoi_type == sixrd_dpo_type))
135 sd = sixrd_dpo_get(dpo->dpoi_index);
136 *sixrd_domain_index = sd->sd_domain;
137 return pool_elt_at_index(mm->domains, *sixrd_domain_index);
139 *error = SIXRD_ERROR_NO_DOMAIN;