diff options
Diffstat (limited to 'src/plugins/acl/dataplane_node_nonip.c')
| -rw-r--r-- | src/plugins/acl/dataplane_node_nonip.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/src/plugins/acl/dataplane_node_nonip.c b/src/plugins/acl/dataplane_node_nonip.c new file mode 100644 index 00000000000..9954ea0258e --- /dev/null +++ b/src/plugins/acl/dataplane_node_nonip.c @@ -0,0 +1,294 @@ +/* + * Copyright (c) 2016-2018 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 <stddef.h> +#include <netinet/in.h> + +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> + + +#include <acl/acl.h> +#include <vnet/ip/icmp46_packet.h> + +#include <plugins/acl/fa_node.h> +#include <plugins/acl/acl.h> +#include <plugins/acl/lookup_context.h> +#include <plugins/acl/public_inlines.h> +#include <plugins/acl/session_inlines.h> + +#include <vppinfra/bihash_40_8.h> +#include <vppinfra/bihash_template.h> + +typedef struct +{ + u32 next_index; + u32 sw_if_index; + u32 lc_index; + u32 match_acl_in_index; + u32 match_rule_index; + u64 packet_info[6]; + u32 trace_bitmap; + u8 action; +} acl_fa_trace_t; + +/* *INDENT-OFF* */ +#define foreach_acl_fa_error \ +_(ACL_DROP, "ACL deny packets") \ +_(ACL_PERMIT, "ACL permit packets") \ +_(ACL_NEW_SESSION, "new sessions added") \ +_(ACL_EXIST_SESSION, "existing session packets") \ +_(ACL_CHECK, "checked packets") \ +_(ACL_RESTART_SESSION_TIMER, "restart session timer") \ +_(ACL_TOO_MANY_SESSIONS, "too many sessions to add new") \ +/* end of errors */ + +typedef enum +{ +#define _(sym,str) ACL_FA_ERROR_##sym, + foreach_acl_fa_error +#undef _ + ACL_FA_N_ERROR, +} acl_fa_error_t; + +/* *INDENT-ON* */ + +typedef struct +{ + u32 next_index; + u32 sw_if_index; + u16 ethertype; +} nonip_in_out_trace_t; + +/* packet trace format function */ +static u8 * +format_nonip_in_out_trace (u8 * s, u32 is_output, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + nonip_in_out_trace_t *t = va_arg (*args, nonip_in_out_trace_t *); + + s = format (s, "%s: sw_if_index %d next_index %x ethertype %x", + is_output ? "OUT-ETHER-WHITELIST" : "IN-ETHER-WHITELIST", + t->sw_if_index, t->next_index, t->ethertype); + return s; +} + +static u8 * +format_l2_nonip_in_trace (u8 * s, va_list * args) +{ + return format_nonip_in_out_trace (s, 0, args); +} + +static u8 * +format_l2_nonip_out_trace (u8 * s, va_list * args) +{ + return format_nonip_in_out_trace (s, 1, args); +} + +#define foreach_nonip_in_error \ +_(DROP, "dropped inbound non-whitelisted non-ip packets") \ +_(PERMIT, "permitted inbound whitelisted non-ip packets") \ + + +#define foreach_nonip_out_error \ +_(DROP, "dropped outbound non-whitelisted non-ip packets") \ +_(PERMIT, "permitted outbound whitelisted non-ip packets") \ + + +/* *INDENT-OFF* */ + +typedef enum +{ +#define _(sym,str) FA_IN_NONIP_ERROR_##sym, + foreach_nonip_in_error +#undef _ + FA_IN_NONIP_N_ERROR, +} l2_in_feat_arc_error_t; + +static char *fa_in_nonip_error_strings[] = { +#define _(sym,string) string, + foreach_nonip_in_error +#undef _ +}; + +typedef enum +{ +#define _(sym,str) FA_OUT_NONIP_ERROR_##sym, + foreach_nonip_out_error +#undef _ + FA_OUT_NONIP_N_ERROR, +} l2_out_feat_arc_error_t; + +static char *fa_out_nonip_error_strings[] = { +#define _(sym,string) string, + foreach_nonip_out_error +#undef _ +}; +/* *INDENT-ON* */ + + +always_inline int +is_permitted_ethertype (acl_main_t * am, int sw_if_index0, int is_output, + u16 ethertype) +{ + u16 **v = is_output + ? am->output_etype_whitelist_by_sw_if_index + : am->input_etype_whitelist_by_sw_if_index; + u16 *whitelist = vec_elt (v, sw_if_index0); + int i; + + if (vec_len (whitelist) == 0) + return 1; + + for (i = 0; i < vec_len (whitelist); i++) + if (whitelist[i] == ethertype) + return 1; + return 0; +} + +#define get_u16(addr) ( *((u16 *)(addr)) ) + +always_inline uword +nonip_in_out_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame, + int is_output) +{ + acl_main_t *am = &acl_main; + u32 n_left, *from; + u16 nexts[VLIB_FRAME_SIZE], *next; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + vlib_node_runtime_t *error_node; + + from = vlib_frame_vector_args (frame); + error_node = vlib_node_get_runtime (vm, node->node_index); + vlib_get_buffers (vm, from, bufs, frame->n_vectors); + /* set the initial values for the current buffer the next pointers */ + b = bufs; + next = nexts; + + n_left = frame->n_vectors; + while (n_left > 0) + { + u32 next_index = 0; + u32 sw_if_index0 = + vnet_buffer (b[0])->sw_if_index[is_output ? VLIB_TX : VLIB_RX]; + u16 ethertype = 0; + + int error0 = 0; + + ethernet_header_t *h0 = vlib_buffer_get_current (b[0]); + u8 *l3h0 = (u8 *) h0 + vnet_buffer (b[0])->l2.l2_len; + ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2)); + + if (is_permitted_ethertype (am, sw_if_index0, is_output, ethertype)) + vnet_feature_next (&next_index, b[0]); + + next[0] = next_index; + + if (0 == next[0]) + b[0]->error = error_node->errors[error0]; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) + { + nonip_in_out_trace_t *t = + vlib_add_trace (vm, node, b[0], sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->ethertype = ethertype; + t->next_index = next[0]; + } + next[0] = next[0] < node->n_next_nodes ? next[0] : 0; + + next++; + b++; + n_left--; + } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + + return frame->n_vectors; +} + +VLIB_NODE_FN (acl_in_nonip_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nonip_in_out_node_fn (vm, node, frame, 0); +} + +VLIB_NODE_FN (acl_out_nonip_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nonip_in_out_node_fn (vm, node, frame, 1); +} + + +/* *INDENT-OFF* */ + +VLIB_REGISTER_NODE (acl_in_nonip_node) = +{ + .name = "acl-plugin-in-nonip-l2", + .vector_size = sizeof (u32), + .format_trace = format_l2_nonip_in_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (fa_in_nonip_error_strings), + .error_strings = fa_in_nonip_error_strings, + .n_next_nodes = ACL_FA_N_NEXT, + .next_nodes = + { + [ACL_FA_ERROR_DROP] = "error-drop", + } +}; + +VNET_FEATURE_INIT (acl_in_l2_nonip_fa_feature, static) = +{ + .arc_name = "l2-input-nonip", + .node_name = "acl-plugin-in-nonip-l2", + .runs_before = VNET_FEATURES ("l2-input-feat-arc-end"), +}; + +VLIB_REGISTER_NODE (acl_out_nonip_node) = +{ + .name = "acl-plugin-out-nonip-l2", + .vector_size = sizeof (u32), + .format_trace = format_l2_nonip_out_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (fa_out_nonip_error_strings), + .error_strings = fa_out_nonip_error_strings, + .n_next_nodes = ACL_FA_N_NEXT, + .next_nodes = + { + [ACL_FA_ERROR_DROP] = "error-drop", + } +}; + +VNET_FEATURE_INIT (acl_out_l2_nonip_fa_feature, static) = +{ + .arc_name = "l2-output-nonip", + .node_name = "acl-plugin-out-nonip-l2", + .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"), +}; + +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |