/* * Copyright (c) 2017 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 <vnet/ip/ip.h> #include <vnet/fib/fib_table.h> u8 ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4) { if (is_ip4) return (ip46_address->ip4.as_u32 == 0); else return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0); } u8 ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4) { if (is_ip4) return (ip46_address->ip4.as_u8[0] == 127); else return (ip46_address->as_u64[0] == 0 && clib_net_to_host_u64 (ip46_address->as_u64[1]) == 1); } u8 ip4_is_local_host (ip4_address_t * ip4_address) { return (ip4_address->as_u8[0] == 127); } u8 ip6_is_local_host (ip6_address_t * ip6_address) { return (ip6_address->as_u64[0] == 0 && clib_net_to_host_u64 (ip6_address->as_u64[1]) == 1); } /** * Checks that an ip is local to the requested fib */ u8 ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4) { fib_node_index_t fei; fib_entry_flag_t flags; fib_prefix_t prefix; /* Check if requester is local */ if (is_ip4) { prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; } else { prefix.fp_len = 128; prefix.fp_proto = FIB_PROTOCOL_IP6; } clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t)); fei = fib_table_lookup (0, &prefix); flags = fib_entry_get_flags (fei); return (flags & FIB_ENTRY_FLAG_LOCAL); } void ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4) { if (is_ip4) dst->ip4.as_u32 = src->ip4.as_u32; else clib_memcpy (&dst->ip6, &src->ip6, sizeof (ip6_address_t)); } void ip_set (ip46_address_t * dst, void *src, u8 is_ip4) { if (is_ip4) dst->ip4.as_u32 = ((ip4_address_t *) src)->as_u32; else clib_memcpy (&dst->ip6, (ip6_address_t *) src, sizeof (ip6_address_t)); } u8 ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4) { ip_interface_address_t *ia = 0; if (is_ip4) { ip_lookup_main_t *lm4 = &ip4_main.lookup_main; ip4_address_t *ip4; /* *INDENT-OFF* */ foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ , ({ ip4 = ip_interface_address_get_address (lm4, ia); if (ip4_address_compare (ip4, &ip->ip4) == 0) return 1; })); /* *INDENT-ON* */ } else { ip_lookup_main_t *lm6 = &ip6_main.lookup_main; ip6_address_t *ip6; /* *INDENT-OFF* */ foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ , ({ ip6 = ip_interface_address_get_address (lm6, ia); if (ip6_address_compare (ip6, &ip->ip6) == 0) return 1; })); /* *INDENT-ON* */ } return 0; } void * ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4) { ip_lookup_main_t *lm4 = &ip4_main.lookup_main; ip_lookup_main_t *lm6 = &ip6_main.lookup_main; ip_interface_address_t *ia = 0; if (is_ip4) { /* *INDENT-OFF* */ foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ , ({ return ip_interface_address_get_address (lm4, ia); })); /* *INDENT-ON* */ } else { /* *INDENT-OFF* */ foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ , ({ ip6_address_t *rv; rv = ip_interface_address_get_address (lm6, ia); /* Trying to use a link-local ip6 src address is a fool's errand */ if (!ip6_address_is_link_local_unicast (rv)) return rv; })); /* *INDENT-ON* */ } return 0; } void ip4_address_normalize (ip4_address_t * ip4, u8 preflen) { ASSERT (preflen <= 32); if (preflen == 0) ip4->data_u32 = 0; else ip4->data_u32 &= clib_net_to_host_u32 (0xffffffff << (32 - preflen)); } void ip6_address_normalize (ip6_address_t * ip6, u8 preflen) { ASSERT (preflen <= 128); if (preflen == 0) { ip6->as_u64[0] = 0; ip6->as_u64[1] = 0; } else if (preflen <= 64) { ip6->as_u64[0] &= clib_host_to_net_u64 (0xffffffffffffffffL << (64 - preflen)); ip6->as_u64[1] = 0; } else ip6->as_u64[1] &= clib_host_to_net_u64 (0xffffffffffffffffL << (128 - preflen)); } void ip4_preflen_to_mask (u8 pref_len, ip4_address_t * ip) { if (pref_len == 0) ip->as_u32 = 0; else ip->as_u32 = clib_host_to_net_u32 (~((1 << (32 - pref_len)) - 1)); } u32 ip4_mask_to_preflen (ip4_address_t * mask) { if (mask->as_u32 == 0) return 0; return (32 - log2_first_set (clib_net_to_host_u32 (mask->as_u32))); } void ip4_prefix_max_address_host_order (ip4_address_t * ip, u8 plen, ip4_address_t * res) { u32 not_mask; not_mask = (1 << (32 - plen)) - 1; res->as_u32 = clib_net_to_host_u32 (ip->as_u32) + not_mask; } void ip6_preflen_to_mask (u8 pref_len, ip6_address_t * mask) { if (pref_len == 0) { mask->as_u64[0] = 0; mask->as_u64[1] = 0; } else if (pref_len <= 64) { mask->as_u64[0] = clib_host_to_net_u64 (0xffffffffffffffffL << (64 - pref_len)); mask->as_u64[1] = 0; } else { mask->as_u64[1] = clib_host_to_net_u64 (0xffffffffffffffffL << (128 - pref_len)); } } void ip6_prefix_max_address_host_order (ip6_address_t * ip, u8 plen, ip6_address_t * res) { u64 not_mask; if (plen == 0) { res->as_u64[0] = 0xffffffffffffffffL; res->as_u64[1] = 0xffffffffffffffffL; } else if (plen <= 64) { not_mask = ((u64) 1 << (64 - plen)) - 1; res->as_u64[0] = clib_net_to_host_u64 (ip->as_u64[0]) + not_mask; res->as_u64[1] = 0xffffffffffffffffL; } else { not_mask = ((u64) 1 << (128 - plen)) - 1; res->as_u64[1] = clib_net_to_host_u64 (ip->as_u64[1]) + not_mask; } } u32 ip6_mask_to_preflen (ip6_address_t * mask) { u8 first1, first0; if (mask->as_u64[0] == 0 && mask->as_u64[1] == 0) return 0; first1 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[1])); first0 = log2_first_set (clib_net_to_host_u64 (mask->as_u64[0])); if (first1 != 0) return 128 - first1; else return 64 - first0; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */