Damjan Marion
c3148b1be8
Type: refactor Change-Id: I5235bf3e9aff58af6ba2c14e8c6529c4fc9ec86c Signed-off-by: Damjan Marion <damarion@cisco.com>
289 lines
7.1 KiB
C
289 lines
7.1 KiB
C
/*
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* Copyright (c) 2016-2018 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include <netinet/in.h>
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#include <vlib/vlib.h>
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#include <vnet/vnet.h>
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#include <vnet/pg/pg.h>
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#include <vppinfra/error.h>
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#include <acl/acl.h>
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#include <vnet/ip/icmp46_packet.h>
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#include <plugins/acl/fa_node.h>
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#include <plugins/acl/acl.h>
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#include <plugins/acl/lookup_context.h>
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#include <plugins/acl/public_inlines.h>
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#include <plugins/acl/session_inlines.h>
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#include <vppinfra/bihash_40_8.h>
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#include <vppinfra/bihash_template.h>
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typedef struct
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{
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u32 next_index;
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u32 sw_if_index;
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u32 lc_index;
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u32 match_acl_in_index;
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u32 match_rule_index;
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u64 packet_info[6];
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u32 trace_bitmap;
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u8 action;
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} acl_fa_trace_t;
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#define foreach_acl_fa_error \
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_(ACL_DROP, "ACL deny packets") \
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_(ACL_PERMIT, "ACL permit packets") \
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_(ACL_NEW_SESSION, "new sessions added") \
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_(ACL_EXIST_SESSION, "existing session packets") \
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_(ACL_CHECK, "checked packets") \
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_(ACL_RESTART_SESSION_TIMER, "restart session timer") \
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_(ACL_TOO_MANY_SESSIONS, "too many sessions to add new") \
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/* end of errors */
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typedef enum
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{
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#define _(sym,str) ACL_FA_ERROR_##sym,
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foreach_acl_fa_error
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#undef _
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ACL_FA_N_ERROR,
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} acl_fa_error_t;
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typedef struct
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{
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u32 next_index;
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u32 sw_if_index;
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u16 ethertype;
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} nonip_in_out_trace_t;
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/* packet trace format function */
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static u8 *
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format_nonip_in_out_trace (u8 * s, u32 is_output, va_list * args)
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{
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CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
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CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
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nonip_in_out_trace_t *t = va_arg (*args, nonip_in_out_trace_t *);
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s = format (s, "%s: sw_if_index %d next_index %x ethertype %x",
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is_output ? "OUT-ETHER-WHITELIST" : "IN-ETHER-WHITELIST",
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t->sw_if_index, t->next_index, t->ethertype);
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return s;
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}
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static u8 *
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format_l2_nonip_in_trace (u8 * s, va_list * args)
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{
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return format_nonip_in_out_trace (s, 0, args);
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}
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static u8 *
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format_l2_nonip_out_trace (u8 * s, va_list * args)
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{
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return format_nonip_in_out_trace (s, 1, args);
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}
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#define foreach_nonip_in_error \
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_(DROP, "dropped inbound non-whitelisted non-ip packets") \
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_(PERMIT, "permitted inbound whitelisted non-ip packets") \
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#define foreach_nonip_out_error \
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_(DROP, "dropped outbound non-whitelisted non-ip packets") \
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_(PERMIT, "permitted outbound whitelisted non-ip packets") \
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typedef enum
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{
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#define _(sym,str) FA_IN_NONIP_ERROR_##sym,
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foreach_nonip_in_error
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#undef _
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FA_IN_NONIP_N_ERROR,
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} l2_in_feat_arc_error_t;
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static char *fa_in_nonip_error_strings[] = {
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#define _(sym,string) string,
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foreach_nonip_in_error
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#undef _
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};
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typedef enum
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{
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#define _(sym,str) FA_OUT_NONIP_ERROR_##sym,
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foreach_nonip_out_error
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#undef _
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FA_OUT_NONIP_N_ERROR,
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} l2_out_feat_arc_error_t;
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static char *fa_out_nonip_error_strings[] = {
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#define _(sym,string) string,
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foreach_nonip_out_error
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#undef _
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};
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always_inline int
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is_permitted_ethertype (acl_main_t * am, int sw_if_index0, int is_output,
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u16 ethertype)
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{
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u16 **v = is_output
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? am->output_etype_whitelist_by_sw_if_index
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: am->input_etype_whitelist_by_sw_if_index;
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u16 *whitelist = vec_elt (v, sw_if_index0);
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int i;
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if (vec_len (whitelist) == 0)
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return 1;
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for (i = 0; i < vec_len (whitelist); i++)
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if (whitelist[i] == ethertype)
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return 1;
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return 0;
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}
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#define get_u16(addr) ( *((u16 *)(addr)) )
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always_inline uword
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nonip_in_out_node_fn (vlib_main_t * vm,
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vlib_node_runtime_t * node, vlib_frame_t * frame,
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int is_output)
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{
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acl_main_t *am = &acl_main;
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u32 n_left, *from;
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u16 nexts[VLIB_FRAME_SIZE], *next;
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vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
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vlib_node_runtime_t *error_node;
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from = vlib_frame_vector_args (frame);
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error_node = vlib_node_get_runtime (vm, node->node_index);
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vlib_get_buffers (vm, from, bufs, frame->n_vectors);
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/* set the initial values for the current buffer the next pointers */
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b = bufs;
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next = nexts;
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n_left = frame->n_vectors;
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while (n_left > 0)
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{
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u32 next_index = 0;
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u32 sw_if_index0 =
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vnet_buffer (b[0])->sw_if_index[is_output ? VLIB_TX : VLIB_RX];
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u16 ethertype = 0;
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int error0 = 0;
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ethernet_header_t *h0 = vlib_buffer_get_current (b[0]);
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u8 *l3h0 = (u8 *) h0 + vnet_buffer (b[0])->l2.l2_len;
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ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
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if (is_permitted_ethertype (am, sw_if_index0, is_output, ethertype))
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vnet_feature_next (&next_index, b[0]);
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next[0] = next_index;
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if (0 == next[0])
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b[0]->error = error_node->errors[error0];
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if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
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&& (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
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{
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nonip_in_out_trace_t *t =
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vlib_add_trace (vm, node, b[0], sizeof (*t));
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t->sw_if_index = sw_if_index0;
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t->ethertype = ethertype;
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t->next_index = next[0];
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}
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next[0] = next[0] < node->n_next_nodes ? next[0] : 0;
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next++;
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b++;
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n_left--;
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}
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vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
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return frame->n_vectors;
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}
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VLIB_NODE_FN (acl_in_nonip_node) (vlib_main_t * vm,
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vlib_node_runtime_t * node,
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vlib_frame_t * frame)
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{
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return nonip_in_out_node_fn (vm, node, frame, 0);
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}
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VLIB_NODE_FN (acl_out_nonip_node) (vlib_main_t * vm,
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vlib_node_runtime_t * node,
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vlib_frame_t * frame)
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{
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return nonip_in_out_node_fn (vm, node, frame, 1);
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}
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VLIB_REGISTER_NODE (acl_in_nonip_node) =
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{
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.name = "acl-plugin-in-nonip-l2",
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.vector_size = sizeof (u32),
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.format_trace = format_l2_nonip_in_trace,
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.type = VLIB_NODE_TYPE_INTERNAL,
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.n_errors = ARRAY_LEN (fa_in_nonip_error_strings),
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.error_strings = fa_in_nonip_error_strings,
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.n_next_nodes = ACL_FA_N_NEXT,
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.next_nodes =
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{
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[ACL_FA_ERROR_DROP] = "error-drop",
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}
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};
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VNET_FEATURE_INIT (acl_in_l2_nonip_fa_feature, static) =
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{
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.arc_name = "l2-input-nonip",
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.node_name = "acl-plugin-in-nonip-l2",
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.runs_before = VNET_FEATURES ("l2-input-feat-arc-end"),
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};
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VLIB_REGISTER_NODE (acl_out_nonip_node) =
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{
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.name = "acl-plugin-out-nonip-l2",
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.vector_size = sizeof (u32),
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.format_trace = format_l2_nonip_out_trace,
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.type = VLIB_NODE_TYPE_INTERNAL,
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.n_errors = ARRAY_LEN (fa_out_nonip_error_strings),
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.error_strings = fa_out_nonip_error_strings,
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.n_next_nodes = ACL_FA_N_NEXT,
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.next_nodes =
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{
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[ACL_FA_ERROR_DROP] = "error-drop",
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}
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};
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VNET_FEATURE_INIT (acl_out_l2_nonip_fa_feature, static) =
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{
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.arc_name = "l2-output-nonip",
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.node_name = "acl-plugin-out-nonip-l2",
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.runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
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};
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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