lldp: protection code to check a valid interface index - vpp

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author	Steve Shin <jonshin@cisco.com>	2017-10-25 11:16:45 -0700
committer	John Lo <loj@cisco.com>	2017-10-25 20:14:01 +0000
commit	cda4c88de76fb37105d6bcb7115f5f6fcd107b9b (patch)
tree	5f7c49ebd7990618e1f005fca472bacd6dd5683d /src
parent	6476b3c1484eed25eeab23774a248a3f8593578e (diff)

lldp: protection code to check a valid interface index

When lldp interface is set, it's better to check valid interface index. Change-Id: I0db0ab6483ad73d28c69893576aa9b719c3b087c Signed-off-by: Steve Shin <jonshin@cisco.com>

Diffstat (limited to 'src')

-rw-r--r--

src/vnet/lldp/lldp_cli.c

1 files changed, 9 insertions, 2 deletions

/* * Copyright (c) 2015 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. */ /* * ip/ip4.h: ip4 main include file * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef included_ip_ip4_h #define included_ip_ip4_h #include <vnet/ip/ip4_packet.h> #include <vnet/ip/ip_flow_hash.h> #include <vnet/ip/lookup.h> #include <vnet/ip/ip_interface.h> #include <vnet/buffer.h> #include <vnet/feature/feature.h> #include <vnet/ip/icmp46_packet.h> typedef struct ip4_mfib_t { /* Hash table for each prefix length mapping. */ uword *fib_entry_by_dst_address[65]; /* Table ID (hash key) for this FIB. */ u32 table_id; /* Index into FIB vector. */ u32 index; } ip4_mfib_t; struct ip4_main_t; typedef void (ip4_add_del_interface_address_function_t) (struct ip4_main_t * im, uword opaque, u32 sw_if_index, ip4_address_t * address, u32 address_length, u32 if_address_index, u32 is_del); typedef struct { ip4_add_del_interface_address_function_t *function; uword function_opaque; } ip4_add_del_interface_address_callback_t; typedef void (ip4_enable_disable_interface_function_t) (struct ip4_main_t * im, uword opaque, u32 sw_if_index, u32 is_enable); typedef struct { ip4_enable_disable_interface_function_t *function; uword function_opaque; } ip4_enable_disable_interface_callback_t; typedef void (ip4_table_bind_function_t) (struct ip4_main_t * im, uword opaque, u32 sw_if_index, u32 new_fib_index, u32 old_fib_index); typedef struct { ip4_table_bind_function_t *function; uword function_opaque; } ip4_table_bind_callback_t; /** * @brief IPv4 main type. * * State of IPv4 VPP processing including: * - FIBs * - Feature indices used in feature topological sort * - Feature node run time references */ typedef struct ip4_main_t { ip_lookup_main_t lookup_main; /** Vector of FIBs. */ struct fib_table_t_ *fibs; /** Vector of MTries. */ struct ip4_fib_t_ *v4_fibs; /** Vector of MFIBs. */ struct mfib_table_t_ *mfibs; u32 fib_masks[33]; /** Table index indexed by software interface. */ u32 *fib_index_by_sw_if_index; /** Table index indexed by software interface. */ u32 *mfib_index_by_sw_if_index; /* IP4 enabled count by software interface */ u8 *ip_enabled_by_sw_if_index; /** Hash table mapping table id to fib index. ID space is not necessarily dense; index space is dense. */ uword *fib_index_by_table_id; /** Hash table mapping table id to multicast fib index. ID space is not necessarily dense; index space is dense. */ uword *mfib_index_by_table_id; /** Functions to call when interface address changes. */ ip4_add_del_interface_address_callback_t * add_del_interface_address_callbacks; /** Functions to call when interface becomes IPv4 enabled/disable. */ ip4_enable_disable_interface_callback_t * enable_disable_interface_callbacks; /** Functions to call when interface to table biding changes. */ ip4_table_bind_callback_t *table_bind_callbacks; /** Template used to generate IP4 ARP packets. */ vlib_packet_template_t ip4_arp_request_packet_template; /** Seed for Jenkins hash used to compute ip4 flow hash. */ u32 flow_hash_seed; /** @brief Template information for VPP generated packets */ struct { /** TTL to use for host generated packets. */ u8 ttl; /** TOS byte to use for host generated packets. */ u8 tos; u8 pad[2]; } host_config; } ip4_main_t; #define ARP_THROTTLE_BITS (512) /** Global ip4 main structure. */ extern ip4_main_t ip4_main; extern char *ip4_error_strings[]; /** Global ip4 input node. Errors get attached to ip4 input node. */ extern vlib_node_registration_t ip4_input_node; extern vlib_node_registration_t ip4_lookup_node; extern vlib_node_registration_t ip4_local_node; extern vlib_node_registration_t ip4_rewrite_node; extern vlib_node_registration_t ip4_rewrite_mcast_node; extern vlib_node_registration_t ip4_rewrite_local_node; extern vlib_node_registration_t ip4_arp_node; extern vlib_node_registration_t ip4_glean_node; extern vlib_node_registration_t ip4_midchain_node; extern vlib_node_registration_t ip4_punt_node; always_inline uword ip4_destination_matches_route (const ip4_main_t * im, const ip4_address_t * key, const ip4_address_t * dest, uword dest_length) { return 0 == ((key->data_u32 ^ dest->data_u32) & im->fib_masks[dest_length]); } always_inline uword ip4_destination_matches_interface (ip4_main_t * im, ip4_address_t * key, ip_interface_address_t * ia) { ip4_address_t *a = ip_interface_address_get_address (&im->lookup_main, ia); return ip4_destination_matches_route (im, key, a, ia->address_length); } /* Find interface address which matches destination. */ always_inline ip4_address_t * ip4_interface_address_matching_destination (ip4_main_t * im, const ip4_address_t * dst, u32 sw_if_index, ip_interface_address_t ** result_ia) { ip_lookup_main_t *lm = &im->lookup_main; ip_interface_address_t *ia; ip4_address_t *result = 0; /* *INDENT-OFF* */ foreach_ip_interface_address (lm, ia, sw_if_index, 1 /* honor unnumbered */, ({ ip4_address_t * a = ip_interface_address_get_address (lm, ia); if (ip4_destination_matches_route (im, dst, a, ia->address_length)) { result = a; break; } })); /* *INDENT-ON* */ if (result_ia) *result_ia = result ? ia : 0; return result; } ip4_address_t *ip4_interface_first_address (ip4_main_t * im, u32 sw_if_index, ip_interface_address_t ** result_ia); clib_error_t *ip4_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index, ip4_address_t * address, u32 address_length, u32 is_del); void ip4_directed_broadcast (u32 sw_if_index, u8 enable); void ip4_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable); int ip4_address_compare (ip4_address_t * a1, ip4_address_t * a2); uword ip4_udp_register_listener (vlib_main_t * vm, u16 dst_port, u32 next_node_index); u16 ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip4_header_t * ip0); void ip4_register_protocol (u32 protocol, u32 node_index); void ip4_unregister_protocol (u32 protocolx); serialize_function_t serialize_vnet_ip4_main, unserialize_vnet_ip4_main; int vnet_set_ip4_classify_intfc (vlib_main_t * vm, u32 sw_if_index, u32 table_index); void ip4_punt_policer_add_del (u8 is_add, u32 policer_index); void ip4_punt_redirect_add (u32 rx_sw_if_index, u32 tx_sw_if_index, ip46_address_t * nh); void ip4_punt_redirect_add_paths (u32 rx_sw_if_index, fib_route_path_t * paths); void ip4_punt_redirect_del (u32 rx_sw_if_index); void ip4_forward_next_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index); u8 *format_ip4_forward_next_trace (u8 * s, va_list * args); u32 ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0); always_inline u32 vlib_buffer_get_ip4_fib_index (vlib_buffer_t * b) { u32 fib_index, sw_if_index; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; fib_index = vnet_buffer (b)->sw_if_index[VLIB_TX]; return (fib_index == (u32) ~ 0) ? vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) : fib_index; } #endif /* included_ip_ip4_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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