| /* |
| * 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. |
| */ |
| |
| /** |
| * @file |
| * @brief IPv4 Full Reassembly. |
| * |
| * This file contains the source code for IPv4 full reassembly. |
| */ |
| |
| #include <vppinfra/vec.h> |
| #include <vnet/vnet.h> |
| #include <vnet/ip/ip.h> |
| #include <vnet/ip/ip.api_enum.h> |
| #include <vppinfra/fifo.h> |
| #include <vppinfra/bihash_16_8.h> |
| #include <vnet/ip/reass/ip4_full_reass.h> |
| #include <stddef.h> |
| |
| #define MSEC_PER_SEC 1000 |
| #define IP4_REASS_TIMEOUT_DEFAULT_MS 200 |
| |
| /* As there are only 1024 reass context per thread, either the DDOS attacks |
| * or fractions of real timeouts, would consume these contexts quickly and |
| * running out context space and unable to perform reassembly */ |
| #define IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 50 // 50 ms default |
| #define IP4_REASS_MAX_REASSEMBLIES_DEFAULT 1024 |
| #define IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3 |
| #define IP4_REASS_HT_LOAD_FACTOR (0.75) |
| |
| #define IP4_REASS_DEBUG_BUFFERS 0 |
| #if IP4_REASS_DEBUG_BUFFERS |
| #define IP4_REASS_DEBUG_BUFFER(bi, what) \ |
| do \ |
| { \ |
| u32 _bi = bi; \ |
| printf (#what "buffer %u", _bi); \ |
| vlib_buffer_t *_b = vlib_get_buffer (vm, _bi); \ |
| while (_b->flags & VLIB_BUFFER_NEXT_PRESENT) \ |
| { \ |
| _bi = _b->next_buffer; \ |
| printf ("[%u]", _bi); \ |
| _b = vlib_get_buffer (vm, _bi); \ |
| } \ |
| printf ("\n"); \ |
| fflush (stdout); \ |
| } \ |
| while (0) |
| #else |
| #define IP4_REASS_DEBUG_BUFFER(...) |
| #endif |
| |
| typedef enum |
| { |
| IP4_REASS_RC_OK, |
| IP4_REASS_RC_TOO_MANY_FRAGMENTS, |
| IP4_REASS_RC_INTERNAL_ERROR, |
| IP4_REASS_RC_NO_BUF, |
| IP4_REASS_RC_HANDOFF, |
| } ip4_full_reass_rc_t; |
| |
| typedef struct |
| { |
| struct |
| { |
| u16 frag_id; |
| u8 proto; |
| u8 unused; |
| u32 fib_index; |
| ip4_address_t src; |
| ip4_address_t dst; |
| }; |
| } ip4_full_reass_key_t; |
| |
| STATIC_ASSERT_SIZEOF (ip4_full_reass_key_t, 16); |
| |
| typedef union |
| { |
| struct |
| { |
| u32 reass_index; |
| u32 memory_owner_thread_index; |
| }; |
| u64 as_u64; |
| } ip4_full_reass_val_t; |
| |
| typedef union |
| { |
| struct |
| { |
| ip4_full_reass_key_t k; |
| ip4_full_reass_val_t v; |
| }; |
| clib_bihash_kv_16_8_t kv; |
| } ip4_full_reass_kv_t; |
| |
| always_inline u32 |
| ip4_full_reass_buffer_get_data_offset (vlib_buffer_t * b) |
| { |
| vnet_buffer_opaque_t *vnb = vnet_buffer (b); |
| return vnb->ip.reass.range_first - vnb->ip.reass.fragment_first; |
| } |
| |
| always_inline u16 |
| ip4_full_reass_buffer_get_data_len (vlib_buffer_t * b) |
| { |
| vnet_buffer_opaque_t *vnb = vnet_buffer (b); |
| return clib_min (vnb->ip.reass.range_last, vnb->ip.reass.fragment_last) - |
| (vnb->ip.reass.fragment_first + |
| ip4_full_reass_buffer_get_data_offset (b)) + 1; |
| } |
| |
| typedef struct |
| { |
| // hash table key |
| ip4_full_reass_key_t key; |
| // time when last packet was received |
| f64 last_heard; |
| // internal id of this reassembly |
| u64 id; |
| // buffer index of first buffer in this reassembly context |
| u32 first_bi; |
| // last octet of packet, ~0 until fragment without more_fragments arrives |
| u32 last_packet_octet; |
| // length of data collected so far |
| u32 data_len; |
| // trace operation counter |
| u32 trace_op_counter; |
| // next index - used by non-feature node |
| u32 next_index; |
| // error next index - used by custom apps (~0 if not used) |
| u32 error_next_index; |
| // minimum fragment length for this reassembly - used to estimate MTU |
| u16 min_fragment_length; |
| // number of fragments in this reassembly |
| u32 fragments_n; |
| // thread owning memory for this context (whose pool contains this ctx) |
| u32 memory_owner_thread_index; |
| // thread which received fragment with offset 0 and which sends out the |
| // completed reassembly |
| u32 sendout_thread_index; |
| } ip4_full_reass_t; |
| |
| typedef struct |
| { |
| ip4_full_reass_t *pool; |
| u32 reass_n; |
| u32 id_counter; |
| // for pacing the main thread timeouts |
| u32 last_id; |
| clib_spinlock_t lock; |
| } ip4_full_reass_per_thread_t; |
| |
| typedef struct |
| { |
| // IPv4 config |
| u32 timeout_ms; |
| f64 timeout; |
| u32 expire_walk_interval_ms; |
| // maximum number of fragments in one reassembly |
| u32 max_reass_len; |
| // maximum number of reassemblies |
| u32 max_reass_n; |
| |
| // IPv4 runtime |
| clib_bihash_16_8_t hash; |
| // per-thread data |
| ip4_full_reass_per_thread_t *per_thread_data; |
| |
| // convenience |
| vlib_main_t *vlib_main; |
| |
| u32 ip4_full_reass_expire_node_idx; |
| |
| /** Worker handoff */ |
| u32 fq_index; |
| u32 fq_local_index; |
| u32 fq_feature_index; |
| u32 fq_custom_index; |
| |
| // reference count for enabling/disabling feature - per interface |
| u32 *feature_use_refcount_per_intf; |
| |
| // whether local fragmented packets are reassembled or not |
| int is_local_reass_enabled; |
| } ip4_full_reass_main_t; |
| |
| extern ip4_full_reass_main_t ip4_full_reass_main; |
| |
| #ifndef CLIB_MARCH_VARIANT |
| ip4_full_reass_main_t ip4_full_reass_main; |
| #endif /* CLIB_MARCH_VARIANT */ |
| |
| typedef enum |
| { |
| IP4_FULL_REASS_NEXT_INPUT, |
| IP4_FULL_REASS_NEXT_DROP, |
| IP4_FULL_REASS_NEXT_HANDOFF, |
| IP4_FULL_REASS_N_NEXT, |
| } ip4_full_reass_next_t; |
| |
| typedef enum |
| { |
| NORMAL, |
| FEATURE, |
| CUSTOM |
| } ip4_full_reass_node_type_t; |
| |
| typedef enum |
| { |
| RANGE_NEW, |
| RANGE_SHRINK, |
| RANGE_DISCARD, |
| RANGE_OVERLAP, |
| FINALIZE, |
| HANDOFF, |
| PASSTHROUGH, |
| } ip4_full_reass_trace_operation_e; |
| |
| typedef struct |
| { |
| u16 range_first; |
| u16 range_last; |
| u32 range_bi; |
| i32 data_offset; |
| u32 data_len; |
| u32 first_bi; |
| } ip4_full_reass_range_trace_t; |
| |
| typedef struct |
| { |
| ip4_full_reass_trace_operation_e action; |
| u32 reass_id; |
| ip4_full_reass_range_trace_t trace_range; |
| u32 size_diff; |
| u32 op_id; |
| u32 thread_id; |
| u32 thread_id_to; |
| u32 fragment_first; |
| u32 fragment_last; |
| u32 total_data_len; |
| bool is_after_handoff; |
| ip4_header_t ip4_header; |
| } ip4_full_reass_trace_t; |
| |
| extern vlib_node_registration_t ip4_full_reass_node; |
| extern vlib_node_registration_t ip4_full_reass_node_feature; |
| extern vlib_node_registration_t ip4_full_reass_node_custom; |
| |
| static void |
| ip4_full_reass_trace_details (vlib_main_t * vm, u32 bi, |
| ip4_full_reass_range_trace_t * trace) |
| { |
| vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
| vnet_buffer_opaque_t *vnb = vnet_buffer (b); |
| trace->range_first = vnb->ip.reass.range_first; |
| trace->range_last = vnb->ip.reass.range_last; |
| trace->data_offset = ip4_full_reass_buffer_get_data_offset (b); |
| trace->data_len = ip4_full_reass_buffer_get_data_len (b); |
| trace->range_bi = bi; |
| } |
| |
| static u8 * |
| format_ip4_full_reass_range_trace (u8 * s, va_list * args) |
| { |
| ip4_full_reass_range_trace_t *trace = |
| va_arg (*args, ip4_full_reass_range_trace_t *); |
| s = |
| format (s, "range: [%u, %u], off %d, len %u, bi %u", trace->range_first, |
| trace->range_last, trace->data_offset, trace->data_len, |
| trace->range_bi); |
| return s; |
| } |
| |
| static u8 * |
| format_ip4_full_reass_trace (u8 * s, 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 *); |
| ip4_full_reass_trace_t *t = va_arg (*args, ip4_full_reass_trace_t *); |
| u32 indent = 0; |
| if (~0 != t->reass_id) |
| { |
| if (t->is_after_handoff) |
| { |
| s = |
| format (s, "%U\n", format_ip4_header, &t->ip4_header, |
| sizeof (t->ip4_header)); |
| indent = 2; |
| } |
| s = |
| format (s, "%Ureass id: %u, op id: %u, ", format_white_space, indent, |
| t->reass_id, t->op_id); |
| indent = format_get_indent (s); |
| s = |
| format (s, |
| "first bi: %u, data len: %u, ip/fragment[%u, %u]", |
| t->trace_range.first_bi, t->total_data_len, t->fragment_first, |
| t->fragment_last); |
| } |
| switch (t->action) |
| { |
| case RANGE_SHRINK: |
| s = format (s, "\n%Ushrink %U by %u", format_white_space, indent, |
| format_ip4_full_reass_range_trace, &t->trace_range, |
| t->size_diff); |
| break; |
| case RANGE_DISCARD: |
| s = format (s, "\n%Udiscard %U", format_white_space, indent, |
| format_ip4_full_reass_range_trace, &t->trace_range); |
| break; |
| case RANGE_NEW: |
| s = format (s, "\n%Unew %U", format_white_space, indent, |
| format_ip4_full_reass_range_trace, &t->trace_range); |
| break; |
| case RANGE_OVERLAP: |
| s = format (s, "\n%Uoverlapping/ignored %U", format_white_space, indent, |
| format_ip4_full_reass_range_trace, &t->trace_range); |
| break; |
| case FINALIZE: |
| s = format (s, "\n%Ufinalize reassembly", format_white_space, indent); |
| break; |
| case HANDOFF: |
| s = |
| format (s, "handoff from thread #%u to thread #%u", t->thread_id, |
| t->thread_id_to); |
| break; |
| case PASSTHROUGH: |
| s = format (s, "passthrough - not a fragment"); |
| break; |
| } |
| return s; |
| } |
| |
| static void |
| ip4_full_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node, |
| ip4_full_reass_t * reass, u32 bi, |
| ip4_full_reass_trace_operation_e action, |
| u32 size_diff, u32 thread_id_to) |
| { |
| vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
| vnet_buffer_opaque_t *vnb = vnet_buffer (b); |
| if (pool_is_free_index |
| (vm->trace_main.trace_buffer_pool, vlib_buffer_get_trace_index (b))) |
| { |
| // this buffer's trace is gone |
| b->flags &= ~VLIB_BUFFER_IS_TRACED; |
| return; |
| } |
| bool is_after_handoff = false; |
| if (vlib_buffer_get_trace_thread (b) != vm->thread_index) |
| { |
| is_after_handoff = true; |
| } |
| ip4_full_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0])); |
| t->is_after_handoff = is_after_handoff; |
| if (t->is_after_handoff) |
| { |
| clib_memcpy (&t->ip4_header, vlib_buffer_get_current (b), |
| clib_min (sizeof (t->ip4_header), b->current_length)); |
| } |
| if (reass) |
| { |
| t->reass_id = reass->id; |
| t->op_id = reass->trace_op_counter; |
| t->trace_range.first_bi = reass->first_bi; |
| t->total_data_len = reass->data_len; |
| ++reass->trace_op_counter; |
| } |
| else |
| { |
| t->reass_id = ~0; |
| t->op_id = 0; |
| t->trace_range.first_bi = 0; |
| t->total_data_len = 0; |
| } |
| t->action = action; |
| ip4_full_reass_trace_details (vm, bi, &t->trace_range); |
| t->size_diff = size_diff; |
| t->thread_id = vm->thread_index; |
| t->thread_id_to = thread_id_to; |
| t->fragment_first = vnb->ip.reass.fragment_first; |
| t->fragment_last = vnb->ip.reass.fragment_last; |
| #if 0 |
| static u8 *s = NULL; |
| s = format (s, "%U", format_ip4_full_reass_trace, NULL, NULL, t); |
| printf ("%.*s\n", vec_len (s), s); |
| fflush (stdout); |
| vec_reset_length (s); |
| #endif |
| } |
| |
| always_inline void |
| ip4_full_reass_free_ctx (ip4_full_reass_per_thread_t * rt, |
| ip4_full_reass_t * reass) |
| { |
| pool_put (rt->pool, reass); |
| --rt->reass_n; |
| } |
| |
| always_inline void |
| ip4_full_reass_free (ip4_full_reass_main_t * rm, |
| ip4_full_reass_per_thread_t * rt, |
| ip4_full_reass_t * reass) |
| { |
| clib_bihash_kv_16_8_t kv = {}; |
| clib_memcpy_fast (&kv, &reass->key, sizeof (kv.key)); |
| clib_bihash_add_del_16_8 (&rm->hash, &kv, 0); |
| return ip4_full_reass_free_ctx (rt, reass); |
| } |
| |
| /* n_left_to_next, and to_next are taken as input params, as this function |
| * could be called from a graphnode, where its managing local copy of these |
| * variables, and ignoring those and still trying to enqueue the buffers |
| * with local variables would cause either buffer leak or corruption */ |
| always_inline void |
| ip4_full_reass_drop_all (vlib_main_t *vm, vlib_node_runtime_t *node, |
| ip4_full_reass_t *reass) |
| { |
| u32 range_bi = reass->first_bi; |
| vlib_buffer_t *range_b; |
| vnet_buffer_opaque_t *range_vnb; |
| u32 *to_free = NULL; |
| |
| while (~0 != range_bi) |
| { |
| range_b = vlib_get_buffer (vm, range_bi); |
| range_vnb = vnet_buffer (range_b); |
| |
| if (~0 != range_bi) |
| { |
| vec_add1 (to_free, range_bi); |
| } |
| |
| range_bi = range_vnb->ip.reass.next_range_bi; |
| } |
| |
| /* send to next_error_index */ |
| if (~0 != reass->error_next_index && |
| reass->error_next_index < node->n_next_nodes) |
| { |
| u32 n_free = vec_len (to_free); |
| |
| /* record number of packets sent to custom app */ |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_TO_CUSTOM_APP, n_free); |
| |
| if (node->flags & VLIB_NODE_FLAG_TRACE) |
| for (u32 i = 0; i < n_free; i++) |
| { |
| vlib_buffer_t *b = vlib_get_buffer (vm, to_free[i]); |
| if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) |
| ip4_full_reass_add_trace (vm, node, reass, to_free[i], |
| RANGE_DISCARD, 0, ~0); |
| } |
| |
| vlib_buffer_enqueue_to_single_next (vm, node, to_free, |
| reass->error_next_index, n_free); |
| } |
| else |
| { |
| vlib_buffer_free (vm, to_free, vec_len (to_free)); |
| } |
| vec_free (to_free); |
| } |
| |
| always_inline void |
| sanitize_reass_buffers_add_missing (vlib_main_t *vm, ip4_full_reass_t *reass, |
| u32 *bi0) |
| { |
| u32 range_bi = reass->first_bi; |
| vlib_buffer_t *range_b; |
| vnet_buffer_opaque_t *range_vnb; |
| |
| while (~0 != range_bi) |
| { |
| range_b = vlib_get_buffer (vm, range_bi); |
| range_vnb = vnet_buffer (range_b); |
| u32 bi = range_bi; |
| if (~0 != bi) |
| { |
| if (bi == *bi0) |
| *bi0 = ~0; |
| if (range_b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| u32 _bi = bi; |
| vlib_buffer_t *_b = vlib_get_buffer (vm, _bi); |
| while (_b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| if (_b->next_buffer != range_vnb->ip.reass.next_range_bi) |
| { |
| _bi = _b->next_buffer; |
| _b = vlib_get_buffer (vm, _bi); |
| } |
| else |
| { |
| _b->flags &= ~VLIB_BUFFER_NEXT_PRESENT; |
| break; |
| } |
| } |
| } |
| range_bi = range_vnb->ip.reass.next_range_bi; |
| } |
| } |
| if (*bi0 != ~0) |
| { |
| vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0); |
| vnet_buffer_opaque_t *fvnb = vnet_buffer (fb); |
| if (~0 != reass->first_bi) |
| { |
| fvnb->ip.reass.next_range_bi = reass->first_bi; |
| reass->first_bi = *bi0; |
| } |
| else |
| { |
| reass->first_bi = *bi0; |
| fvnb->ip.reass.next_range_bi = ~0; |
| } |
| *bi0 = ~0; |
| } |
| } |
| |
| always_inline void |
| ip4_full_reass_init (ip4_full_reass_t * reass) |
| { |
| reass->first_bi = ~0; |
| reass->last_packet_octet = ~0; |
| reass->data_len = 0; |
| reass->next_index = ~0; |
| reass->error_next_index = ~0; |
| } |
| |
| always_inline ip4_full_reass_t * |
| ip4_full_reass_find_or_create (vlib_main_t *vm, vlib_node_runtime_t *node, |
| ip4_full_reass_main_t *rm, |
| ip4_full_reass_per_thread_t *rt, |
| ip4_full_reass_kv_t *kv, u8 *do_handoff) |
| { |
| ip4_full_reass_t *reass; |
| f64 now; |
| |
| again: |
| |
| reass = NULL; |
| now = vlib_time_now (vm); |
| if (!clib_bihash_search_16_8 (&rm->hash, &kv->kv, &kv->kv)) |
| { |
| if (vm->thread_index != kv->v.memory_owner_thread_index) |
| { |
| *do_handoff = 1; |
| return NULL; |
| } |
| reass = |
| pool_elt_at_index (rm->per_thread_data |
| [kv->v.memory_owner_thread_index].pool, |
| kv->v.reass_index); |
| |
| if (now > reass->last_heard + rm->timeout) |
| { |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_TIMEOUT, 1); |
| ip4_full_reass_drop_all (vm, node, reass); |
| ip4_full_reass_free (rm, rt, reass); |
| reass = NULL; |
| } |
| } |
| |
| if (reass) |
| { |
| reass->last_heard = now; |
| return reass; |
| } |
| |
| if (rt->reass_n >= rm->max_reass_n) |
| { |
| reass = NULL; |
| return reass; |
| } |
| else |
| { |
| pool_get (rt->pool, reass); |
| clib_memset (reass, 0, sizeof (*reass)); |
| reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter; |
| reass->memory_owner_thread_index = vm->thread_index; |
| ++rt->id_counter; |
| ip4_full_reass_init (reass); |
| ++rt->reass_n; |
| } |
| |
| clib_memcpy_fast (&reass->key, &kv->kv.key, sizeof (reass->key)); |
| kv->v.reass_index = (reass - rt->pool); |
| kv->v.memory_owner_thread_index = vm->thread_index; |
| reass->last_heard = now; |
| |
| int rv = clib_bihash_add_del_16_8 (&rm->hash, &kv->kv, 2); |
| if (rv) |
| { |
| ip4_full_reass_free_ctx (rt, reass); |
| reass = NULL; |
| // if other worker created a context already work with the other copy |
| if (-2 == rv) |
| goto again; |
| } |
| |
| return reass; |
| } |
| |
| always_inline ip4_full_reass_rc_t |
| ip4_full_reass_finalize (vlib_main_t * vm, vlib_node_runtime_t * node, |
| ip4_full_reass_main_t * rm, |
| ip4_full_reass_per_thread_t * rt, |
| ip4_full_reass_t * reass, u32 * bi0, |
| u32 * next0, u32 * error0, bool is_custom) |
| { |
| vlib_buffer_t *first_b = vlib_get_buffer (vm, reass->first_bi); |
| vlib_buffer_t *last_b = NULL; |
| u32 sub_chain_bi = reass->first_bi; |
| u32 total_length = 0; |
| do |
| { |
| u32 tmp_bi = sub_chain_bi; |
| vlib_buffer_t *tmp = vlib_get_buffer (vm, tmp_bi); |
| ip4_header_t *ip = vlib_buffer_get_current (tmp); |
| vnet_buffer_opaque_t *vnb = vnet_buffer (tmp); |
| if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) && |
| !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| |
| u32 data_len = ip4_full_reass_buffer_get_data_len (tmp); |
| u32 trim_front = |
| ip4_header_bytes (ip) + ip4_full_reass_buffer_get_data_offset (tmp); |
| u32 trim_end = |
| vlib_buffer_length_in_chain (vm, tmp) - trim_front - data_len; |
| if (tmp_bi == reass->first_bi) |
| { |
| /* first buffer - keep ip4 header */ |
| if (0 != ip4_full_reass_buffer_get_data_offset (tmp)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| trim_front = 0; |
| trim_end = vlib_buffer_length_in_chain (vm, tmp) - data_len - |
| ip4_header_bytes (ip); |
| if (!(vlib_buffer_length_in_chain (vm, tmp) - trim_end > 0)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| } |
| u32 keep_data = |
| vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end; |
| while (1) |
| { |
| if (trim_front) |
| { |
| if (trim_front > tmp->current_length) |
| { |
| /* drop whole buffer */ |
| u32 to_be_freed_bi = tmp_bi; |
| trim_front -= tmp->current_length; |
| if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT; |
| tmp_bi = tmp->next_buffer; |
| tmp->next_buffer = 0; |
| tmp = vlib_get_buffer (vm, tmp_bi); |
| vlib_buffer_free_one (vm, to_be_freed_bi); |
| continue; |
| } |
| else |
| { |
| vlib_buffer_advance (tmp, trim_front); |
| trim_front = 0; |
| } |
| } |
| if (keep_data) |
| { |
| if (last_b) |
| { |
| last_b->flags |= VLIB_BUFFER_NEXT_PRESENT; |
| last_b->next_buffer = tmp_bi; |
| } |
| last_b = tmp; |
| if (keep_data <= tmp->current_length) |
| { |
| tmp->current_length = keep_data; |
| keep_data = 0; |
| } |
| else |
| { |
| keep_data -= tmp->current_length; |
| if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| } |
| total_length += tmp->current_length; |
| if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| tmp_bi = tmp->next_buffer; |
| tmp = vlib_get_buffer (vm, tmp->next_buffer); |
| } |
| else |
| { |
| break; |
| } |
| } |
| else |
| { |
| u32 to_be_freed_bi = tmp_bi; |
| if (reass->first_bi == tmp_bi) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT; |
| tmp_bi = tmp->next_buffer; |
| tmp->next_buffer = 0; |
| tmp = vlib_get_buffer (vm, tmp_bi); |
| vlib_buffer_free_one (vm, to_be_freed_bi); |
| } |
| else |
| { |
| tmp->next_buffer = 0; |
| vlib_buffer_free_one (vm, to_be_freed_bi); |
| break; |
| } |
| } |
| } |
| sub_chain_bi = |
| vnet_buffer (vlib_get_buffer (vm, sub_chain_bi))->ip. |
| reass.next_range_bi; |
| } |
| while (~0 != sub_chain_bi); |
| |
| if (!last_b) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT; |
| |
| if (total_length < first_b->current_length) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| total_length -= first_b->current_length; |
| first_b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; |
| first_b->total_length_not_including_first_buffer = total_length; |
| ip4_header_t *ip = vlib_buffer_get_current (first_b); |
| ip->flags_and_fragment_offset = 0; |
| ip->length = clib_host_to_net_u16 (first_b->current_length + total_length); |
| ip->checksum = ip4_header_checksum (ip); |
| if (!vlib_buffer_chain_linearize (vm, first_b)) |
| { |
| return IP4_REASS_RC_NO_BUF; |
| } |
| // reset to reconstruct the mbuf linking |
| first_b->flags &= ~VLIB_BUFFER_EXT_HDR_VALID; |
| if (PREDICT_FALSE (first_b->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, reass->first_bi, FINALIZE, 0, |
| ~0); |
| #if 0 |
| // following code does a hexdump of packet fragments to stdout ... |
| do |
| { |
| u32 bi = reass->first_bi; |
| u8 *s = NULL; |
| while (~0 != bi) |
| { |
| vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
| s = format (s, "%u: %U\n", bi, format_hexdump, |
| vlib_buffer_get_current (b), b->current_length); |
| if (b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| bi = b->next_buffer; |
| } |
| else |
| { |
| break; |
| } |
| } |
| printf ("%.*s\n", vec_len (s), s); |
| fflush (stdout); |
| vec_free (s); |
| } |
| while (0); |
| #endif |
| } |
| *bi0 = reass->first_bi; |
| if (!is_custom) |
| { |
| *next0 = IP4_FULL_REASS_NEXT_INPUT; |
| } |
| else |
| { |
| *next0 = reass->next_index; |
| } |
| vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length; |
| |
| /* Keep track of number of successfully reassembled packets and number of |
| * fragments reassembled */ |
| vlib_node_increment_counter (vm, node->node_index, IP4_ERROR_REASS_SUCCESS, |
| 1); |
| |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_FRAGMENTS_REASSEMBLED, |
| reass->fragments_n); |
| |
| *error0 = IP4_ERROR_NONE; |
| ip4_full_reass_free (rm, rt, reass); |
| reass = NULL; |
| return IP4_REASS_RC_OK; |
| } |
| |
| always_inline ip4_full_reass_rc_t |
| ip4_full_reass_insert_range_in_chain (vlib_main_t * vm, |
| ip4_full_reass_t * reass, |
| u32 prev_range_bi, u32 new_next_bi) |
| { |
| vlib_buffer_t *new_next_b = vlib_get_buffer (vm, new_next_bi); |
| vnet_buffer_opaque_t *new_next_vnb = vnet_buffer (new_next_b); |
| if (~0 != prev_range_bi) |
| { |
| vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi); |
| vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b); |
| new_next_vnb->ip.reass.next_range_bi = prev_vnb->ip.reass.next_range_bi; |
| prev_vnb->ip.reass.next_range_bi = new_next_bi; |
| } |
| else |
| { |
| if (~0 != reass->first_bi) |
| { |
| new_next_vnb->ip.reass.next_range_bi = reass->first_bi; |
| } |
| reass->first_bi = new_next_bi; |
| } |
| vnet_buffer_opaque_t *vnb = vnet_buffer (new_next_b); |
| if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) && |
| !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| reass->data_len += ip4_full_reass_buffer_get_data_len (new_next_b); |
| return IP4_REASS_RC_OK; |
| } |
| |
| always_inline ip4_full_reass_rc_t |
| ip4_full_reass_remove_range_from_chain (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| ip4_full_reass_t * reass, |
| u32 prev_range_bi, u32 discard_bi) |
| { |
| vlib_buffer_t *discard_b = vlib_get_buffer (vm, discard_bi); |
| vnet_buffer_opaque_t *discard_vnb = vnet_buffer (discard_b); |
| if (~0 != prev_range_bi) |
| { |
| vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_range_bi); |
| vnet_buffer_opaque_t *prev_vnb = vnet_buffer (prev_b); |
| if (!(prev_vnb->ip.reass.next_range_bi == discard_bi)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| prev_vnb->ip.reass.next_range_bi = discard_vnb->ip.reass.next_range_bi; |
| } |
| else |
| { |
| reass->first_bi = discard_vnb->ip.reass.next_range_bi; |
| } |
| vnet_buffer_opaque_t *vnb = vnet_buffer (discard_b); |
| if (!(vnb->ip.reass.range_first >= vnb->ip.reass.fragment_first) && |
| !(vnb->ip.reass.range_last > vnb->ip.reass.fragment_first)) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| reass->data_len -= ip4_full_reass_buffer_get_data_len (discard_b); |
| while (1) |
| { |
| u32 to_be_freed_bi = discard_bi; |
| if (PREDICT_FALSE (discard_b->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, discard_bi, RANGE_DISCARD, |
| 0, ~0); |
| } |
| if (discard_b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| discard_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT; |
| discard_bi = discard_b->next_buffer; |
| discard_b->next_buffer = 0; |
| discard_b = vlib_get_buffer (vm, discard_bi); |
| vlib_buffer_free_one (vm, to_be_freed_bi); |
| } |
| else |
| { |
| discard_b->next_buffer = 0; |
| vlib_buffer_free_one (vm, to_be_freed_bi); |
| break; |
| } |
| } |
| return IP4_REASS_RC_OK; |
| } |
| |
| always_inline ip4_full_reass_rc_t |
| ip4_full_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node, |
| ip4_full_reass_main_t * rm, |
| ip4_full_reass_per_thread_t * rt, |
| ip4_full_reass_t * reass, u32 * bi0, u32 * next0, |
| u32 * error0, bool is_custom, u32 * handoff_thread_idx) |
| { |
| vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0); |
| vnet_buffer_opaque_t *fvnb = vnet_buffer (fb); |
| if (is_custom) |
| { |
| // store (error_)next_index before it's overwritten |
| reass->next_index = fvnb->ip.reass.next_index; |
| reass->error_next_index = fvnb->ip.reass.error_next_index; |
| } |
| ip4_full_reass_rc_t rc = IP4_REASS_RC_OK; |
| int consumed = 0; |
| ip4_header_t *fip = vlib_buffer_get_current (fb); |
| const u32 fragment_first = ip4_get_fragment_offset_bytes (fip); |
| const u32 fragment_length = |
| clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip); |
| const u32 fragment_last = fragment_first + fragment_length - 1; |
| fvnb->ip.reass.fragment_first = fragment_first; |
| fvnb->ip.reass.fragment_last = fragment_last; |
| int more_fragments = ip4_get_fragment_more (fip); |
| u32 candidate_range_bi = reass->first_bi; |
| u32 prev_range_bi = ~0; |
| fvnb->ip.reass.range_first = fragment_first; |
| fvnb->ip.reass.range_last = fragment_last; |
| fvnb->ip.reass.next_range_bi = ~0; |
| if (!more_fragments) |
| { |
| reass->last_packet_octet = fragment_last; |
| } |
| if (~0 == reass->first_bi) |
| { |
| // starting a new reassembly |
| rc = |
| ip4_full_reass_insert_range_in_chain (vm, reass, prev_range_bi, *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, *bi0, RANGE_NEW, 0, ~0); |
| } |
| *bi0 = ~0; |
| reass->min_fragment_length = clib_net_to_host_u16 (fip->length); |
| reass->fragments_n = 1; |
| return IP4_REASS_RC_OK; |
| } |
| reass->min_fragment_length = |
| clib_min (clib_net_to_host_u16 (fip->length), |
| fvnb->ip.reass.estimated_mtu); |
| while (~0 != candidate_range_bi) |
| { |
| vlib_buffer_t *candidate_b = vlib_get_buffer (vm, candidate_range_bi); |
| vnet_buffer_opaque_t *candidate_vnb = vnet_buffer (candidate_b); |
| if (fragment_first > candidate_vnb->ip.reass.range_last) |
| { |
| // this fragments starts after candidate range |
| prev_range_bi = candidate_range_bi; |
| candidate_range_bi = candidate_vnb->ip.reass.next_range_bi; |
| if (candidate_vnb->ip.reass.range_last < fragment_last && |
| ~0 == candidate_range_bi) |
| { |
| // special case - this fragment falls beyond all known ranges |
| rc = ip4_full_reass_insert_range_in_chain (vm, reass, |
| prev_range_bi, *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| consumed = 1; |
| break; |
| } |
| continue; |
| } |
| if (fragment_last < candidate_vnb->ip.reass.range_first) |
| { |
| // this fragment ends before candidate range without any overlap |
| rc = ip4_full_reass_insert_range_in_chain (vm, reass, prev_range_bi, |
| *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| consumed = 1; |
| } |
| else |
| { |
| if (fragment_first >= candidate_vnb->ip.reass.range_first && |
| fragment_last <= candidate_vnb->ip.reass.range_last) |
| { |
| // this fragment is a (sub)part of existing range, ignore it |
| if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, *bi0, |
| RANGE_OVERLAP, 0, ~0); |
| } |
| break; |
| } |
| int discard_candidate = 0; |
| if (fragment_first < candidate_vnb->ip.reass.range_first) |
| { |
| u32 overlap = |
| fragment_last - candidate_vnb->ip.reass.range_first + 1; |
| if (overlap < ip4_full_reass_buffer_get_data_len (candidate_b)) |
| { |
| candidate_vnb->ip.reass.range_first += overlap; |
| if (reass->data_len < overlap) |
| { |
| return IP4_REASS_RC_INTERNAL_ERROR; |
| } |
| reass->data_len -= overlap; |
| if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, |
| candidate_range_bi, |
| RANGE_SHRINK, 0, ~0); |
| } |
| rc = ip4_full_reass_insert_range_in_chain ( |
| vm, reass, prev_range_bi, *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| consumed = 1; |
| } |
| else |
| { |
| discard_candidate = 1; |
| } |
| } |
| else if (fragment_last > candidate_vnb->ip.reass.range_last) |
| { |
| u32 overlap = |
| candidate_vnb->ip.reass.range_last - fragment_first + 1; |
| if (overlap < ip4_full_reass_buffer_get_data_len (candidate_b)) |
| { |
| fvnb->ip.reass.range_first += overlap; |
| if (~0 != candidate_vnb->ip.reass.next_range_bi) |
| { |
| prev_range_bi = candidate_range_bi; |
| candidate_range_bi = |
| candidate_vnb->ip.reass.next_range_bi; |
| continue; |
| } |
| else |
| { |
| // special case - last range discarded |
| rc = ip4_full_reass_insert_range_in_chain ( |
| vm, reass, candidate_range_bi, *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| consumed = 1; |
| } |
| } |
| else |
| { |
| discard_candidate = 1; |
| } |
| } |
| else |
| { |
| discard_candidate = 1; |
| } |
| if (discard_candidate) |
| { |
| u32 next_range_bi = candidate_vnb->ip.reass.next_range_bi; |
| // discard candidate range, probe next range |
| rc = ip4_full_reass_remove_range_from_chain ( |
| vm, node, reass, prev_range_bi, candidate_range_bi); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| if (~0 != next_range_bi) |
| { |
| candidate_range_bi = next_range_bi; |
| continue; |
| } |
| else |
| { |
| // special case - last range discarded |
| rc = ip4_full_reass_insert_range_in_chain ( |
| vm, reass, prev_range_bi, *bi0); |
| if (IP4_REASS_RC_OK != rc) |
| { |
| return rc; |
| } |
| consumed = 1; |
| } |
| } |
| } |
| break; |
| } |
| ++reass->fragments_n; |
| if (consumed) |
| { |
| if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace (vm, node, reass, *bi0, RANGE_NEW, 0, ~0); |
| } |
| } |
| if (~0 != reass->last_packet_octet && |
| reass->data_len == reass->last_packet_octet + 1) |
| { |
| *handoff_thread_idx = reass->sendout_thread_index; |
| int handoff = |
| reass->memory_owner_thread_index != reass->sendout_thread_index; |
| rc = |
| ip4_full_reass_finalize (vm, node, rm, rt, reass, bi0, next0, error0, |
| is_custom); |
| if (IP4_REASS_RC_OK == rc && handoff) |
| { |
| rc = IP4_REASS_RC_HANDOFF; |
| } |
| } |
| else |
| { |
| if (consumed) |
| { |
| *bi0 = ~0; |
| if (reass->fragments_n > rm->max_reass_len) |
| { |
| rc = IP4_REASS_RC_TOO_MANY_FRAGMENTS; |
| } |
| } |
| else |
| { |
| *next0 = IP4_FULL_REASS_NEXT_DROP; |
| *error0 = IP4_ERROR_REASS_DUPLICATE_FRAGMENT; |
| } |
| } |
| return rc; |
| } |
| |
| always_inline uword |
| ip4_full_reass_inline (vlib_main_t *vm, vlib_node_runtime_t *node, |
| vlib_frame_t *frame, ip4_full_reass_node_type_t type, |
| bool is_local) |
| { |
| u32 *from = vlib_frame_vector_args (frame); |
| u32 n_left, n_next = 0, to_next[VLIB_FRAME_SIZE]; |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| ip4_full_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index]; |
| u16 nexts[VLIB_FRAME_SIZE]; |
| |
| clib_spinlock_lock (&rt->lock); |
| |
| n_left = frame->n_vectors; |
| while (n_left > 0) |
| { |
| u32 bi0; |
| vlib_buffer_t *b0; |
| u32 next0; |
| u32 error0 = IP4_ERROR_NONE; |
| |
| bi0 = from[0]; |
| b0 = vlib_get_buffer (vm, bi0); |
| |
| ip4_header_t *ip0 = vlib_buffer_get_current (b0); |
| if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0)) |
| { |
| // this is a whole packet - no fragmentation |
| if (CUSTOM != type) |
| { |
| next0 = IP4_FULL_REASS_NEXT_INPUT; |
| } |
| else |
| { |
| next0 = vnet_buffer (b0)->ip.reass.next_index; |
| } |
| ip4_full_reass_add_trace (vm, node, NULL, bi0, PASSTHROUGH, 0, ~0); |
| goto packet_enqueue; |
| } |
| |
| if (is_local && !rm->is_local_reass_enabled) |
| { |
| next0 = IP4_FULL_REASS_NEXT_DROP; |
| goto packet_enqueue; |
| } |
| |
| const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0); |
| const u32 fragment_length = |
| clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0); |
| const u32 fragment_last = fragment_first + fragment_length - 1; |
| |
| /* Keep track of received fragments */ |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_FRAGMENTS_RCVD, 1); |
| |
| if (fragment_first > fragment_last || |
| fragment_first + fragment_length > UINT16_MAX - 20 || |
| (fragment_length < 8 && // 8 is minimum frag length per RFC 791 |
| ip4_get_fragment_more (ip0))) |
| { |
| next0 = IP4_FULL_REASS_NEXT_DROP; |
| error0 = IP4_ERROR_REASS_MALFORMED_PACKET; |
| goto packet_enqueue; |
| } |
| |
| u32 fib_index = (vnet_buffer (b0)->sw_if_index[VLIB_TX] == (u32) ~0) ? |
| vec_elt (ip4_main.fib_index_by_sw_if_index, |
| vnet_buffer (b0)->sw_if_index[VLIB_RX]) : |
| vnet_buffer (b0)->sw_if_index[VLIB_TX]; |
| |
| ip4_full_reass_kv_t kv = { .k.fib_index = fib_index, |
| .k.src.as_u32 = ip0->src_address.as_u32, |
| .k.dst.as_u32 = ip0->dst_address.as_u32, |
| .k.frag_id = ip0->fragment_id, |
| .k.proto = ip0->protocol |
| |
| }; |
| u8 do_handoff = 0; |
| |
| ip4_full_reass_t *reass = |
| ip4_full_reass_find_or_create (vm, node, rm, rt, &kv, &do_handoff); |
| |
| if (reass) |
| { |
| const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0); |
| if (0 == fragment_first) |
| { |
| reass->sendout_thread_index = vm->thread_index; |
| } |
| } |
| |
| if (PREDICT_FALSE (do_handoff)) |
| { |
| next0 = IP4_FULL_REASS_NEXT_HANDOFF; |
| vnet_buffer (b0)->ip.reass.owner_thread_index = |
| kv.v.memory_owner_thread_index; |
| } |
| else if (reass) |
| { |
| u32 handoff_thread_idx; |
| u32 counter = ~0; |
| switch (ip4_full_reass_update (vm, node, rm, rt, reass, &bi0, &next0, |
| &error0, CUSTOM == type, |
| &handoff_thread_idx)) |
| { |
| case IP4_REASS_RC_OK: |
| /* nothing to do here */ |
| break; |
| case IP4_REASS_RC_HANDOFF: |
| next0 = IP4_FULL_REASS_NEXT_HANDOFF; |
| b0 = vlib_get_buffer (vm, bi0); |
| vnet_buffer (b0)->ip.reass.owner_thread_index = |
| handoff_thread_idx; |
| break; |
| case IP4_REASS_RC_TOO_MANY_FRAGMENTS: |
| counter = IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG; |
| break; |
| case IP4_REASS_RC_NO_BUF: |
| counter = IP4_ERROR_REASS_NO_BUF; |
| break; |
| case IP4_REASS_RC_INTERNAL_ERROR: |
| counter = IP4_ERROR_REASS_INTERNAL_ERROR; |
| /* Sanitization is needed in internal error cases only, as |
| * the incoming packet is already dropped in other cases, |
| * also adding bi0 back to the reassembly list, fixes the |
| * leaking of buffers during internal errors. |
| * |
| * Also it doesnt make sense to send these buffers custom |
| * app, these fragments are with internal errors */ |
| sanitize_reass_buffers_add_missing (vm, reass, &bi0); |
| reass->error_next_index = ~0; |
| break; |
| } |
| |
| if (~0 != counter) |
| { |
| vlib_node_increment_counter (vm, node->node_index, counter, 1); |
| ip4_full_reass_drop_all (vm, node, reass); |
| ip4_full_reass_free (rm, rt, reass); |
| goto next_packet; |
| } |
| } |
| else |
| { |
| next0 = IP4_FULL_REASS_NEXT_DROP; |
| error0 = IP4_ERROR_REASS_LIMIT_REACHED; |
| } |
| |
| packet_enqueue: |
| |
| if (bi0 != ~0) |
| { |
| /* bi0 might have been updated by reass_finalize, reload */ |
| b0 = vlib_get_buffer (vm, bi0); |
| if (IP4_ERROR_NONE != error0) |
| { |
| b0->error = node->errors[error0]; |
| } |
| |
| if (next0 == IP4_FULL_REASS_NEXT_HANDOFF) |
| { |
| if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) |
| { |
| ip4_full_reass_add_trace ( |
| vm, node, NULL, bi0, HANDOFF, 0, |
| vnet_buffer (b0)->ip.reass.owner_thread_index); |
| } |
| } |
| else if (FEATURE == type && IP4_ERROR_NONE == error0) |
| { |
| vnet_feature_next (&next0, b0); |
| } |
| |
| /* Increment the counter to-custom-app also as this fragment is |
| * also going to application */ |
| if (CUSTOM == type) |
| { |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_TO_CUSTOM_APP, 1); |
| } |
| |
| to_next[n_next] = bi0; |
| nexts[n_next] = next0; |
| n_next++; |
| IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next); |
| } |
| |
| next_packet: |
| from += 1; |
| n_left -= 1; |
| } |
| |
| clib_spinlock_unlock (&rt->lock); |
| |
| vlib_buffer_enqueue_to_next (vm, node, to_next, nexts, n_next); |
| return frame->n_vectors; |
| } |
| |
| VLIB_NODE_FN (ip4_full_reass_node) (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_inline (vm, node, frame, NORMAL, false /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_node) = { |
| .name = "ip4-full-reassembly", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip4_full_reass_trace, |
| .n_errors = IP4_N_ERROR, |
| .error_counters = ip4_error_counters, |
| .n_next_nodes = IP4_FULL_REASS_N_NEXT, |
| .next_nodes = |
| { |
| [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input", |
| [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop", |
| [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-full-reassembly-handoff", |
| |
| }, |
| }; |
| |
| VLIB_NODE_FN (ip4_local_full_reass_node) |
| (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) |
| { |
| return ip4_full_reass_inline (vm, node, frame, NORMAL, true /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_local_full_reass_node) = { |
| .name = "ip4-local-full-reassembly", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip4_full_reass_trace, |
| .n_errors = IP4_N_ERROR, |
| .error_counters = ip4_error_counters, |
| .n_next_nodes = IP4_FULL_REASS_N_NEXT, |
| .next_nodes = |
| { |
| [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input", |
| [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop", |
| [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-local-full-reassembly-handoff", |
| |
| }, |
| }; |
| |
| VLIB_NODE_FN (ip4_full_reass_node_feature) (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_inline (vm, node, frame, FEATURE, |
| false /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_node_feature) = { |
| .name = "ip4-full-reassembly-feature", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip4_full_reass_trace, |
| .n_errors = IP4_N_ERROR, |
| .error_counters = ip4_error_counters, |
| .n_next_nodes = IP4_FULL_REASS_N_NEXT, |
| .next_nodes = |
| { |
| [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input", |
| [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop", |
| [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-full-reass-feature-hoff", |
| }, |
| }; |
| |
| VNET_FEATURE_INIT (ip4_full_reass_feature, static) = { |
| .arc_name = "ip4-unicast", |
| .node_name = "ip4-full-reassembly-feature", |
| .runs_before = VNET_FEATURES ("ip4-lookup", "ipsec4-input-feature", |
| "ip4-sv-reassembly-feature"), |
| .runs_after = 0, |
| }; |
| |
| VLIB_NODE_FN (ip4_full_reass_node_custom) (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_inline (vm, node, frame, CUSTOM, false /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_node_custom) = { |
| .name = "ip4-full-reassembly-custom", |
| .vector_size = sizeof (u32), |
| .format_trace = format_ip4_full_reass_trace, |
| .n_errors = IP4_N_ERROR, |
| .error_counters = ip4_error_counters, |
| .n_next_nodes = IP4_FULL_REASS_N_NEXT, |
| .next_nodes = |
| { |
| [IP4_FULL_REASS_NEXT_INPUT] = "ip4-input", |
| [IP4_FULL_REASS_NEXT_DROP] = "ip4-drop", |
| [IP4_FULL_REASS_NEXT_HANDOFF] = "ip4-full-reass-custom-hoff", |
| }, |
| }; |
| |
| #ifndef CLIB_MARCH_VARIANT |
| uword |
| ip4_full_reass_custom_register_next_node (uword node_index) |
| { |
| return vlib_node_add_next (vlib_get_main (), |
| ip4_full_reass_node_custom.index, node_index); |
| } |
| |
| always_inline u32 |
| ip4_full_reass_get_nbuckets () |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| u32 nbuckets; |
| u8 i; |
| |
| /* need more mem with more workers */ |
| nbuckets = (u32) (rm->max_reass_n * (vlib_num_workers () + 1) / |
| IP4_REASS_HT_LOAD_FACTOR); |
| |
| for (i = 0; i < 31; i++) |
| if ((1 << i) >= nbuckets) |
| break; |
| nbuckets = 1 << i; |
| |
| return nbuckets; |
| } |
| #endif /* CLIB_MARCH_VARIANT */ |
| |
| typedef enum |
| { |
| IP4_EVENT_CONFIG_CHANGED = 1, |
| } ip4_full_reass_event_t; |
| |
| typedef struct |
| { |
| int failure; |
| clib_bihash_16_8_t *new_hash; |
| } ip4_rehash_cb_ctx; |
| |
| #ifndef CLIB_MARCH_VARIANT |
| static int |
| ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx) |
| { |
| ip4_rehash_cb_ctx *ctx = _ctx; |
| if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1)) |
| { |
| ctx->failure = 1; |
| } |
| return (BIHASH_WALK_CONTINUE); |
| } |
| |
| static void |
| ip4_full_reass_set_params (u32 timeout_ms, u32 max_reassemblies, |
| u32 max_reassembly_length, |
| u32 expire_walk_interval_ms) |
| { |
| ip4_full_reass_main.timeout_ms = timeout_ms; |
| ip4_full_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC; |
| ip4_full_reass_main.max_reass_n = max_reassemblies; |
| ip4_full_reass_main.max_reass_len = max_reassembly_length; |
| ip4_full_reass_main.expire_walk_interval_ms = expire_walk_interval_ms; |
| } |
| |
| vnet_api_error_t |
| ip4_full_reass_set (u32 timeout_ms, u32 max_reassemblies, |
| u32 max_reassembly_length, u32 expire_walk_interval_ms) |
| { |
| u32 old_nbuckets = ip4_full_reass_get_nbuckets (); |
| ip4_full_reass_set_params (timeout_ms, max_reassemblies, |
| max_reassembly_length, expire_walk_interval_ms); |
| vlib_process_signal_event (ip4_full_reass_main.vlib_main, |
| ip4_full_reass_main.ip4_full_reass_expire_node_idx, |
| IP4_EVENT_CONFIG_CHANGED, 0); |
| u32 new_nbuckets = ip4_full_reass_get_nbuckets (); |
| if (ip4_full_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets) |
| { |
| clib_bihash_16_8_t new_hash; |
| clib_memset (&new_hash, 0, sizeof (new_hash)); |
| ip4_rehash_cb_ctx ctx; |
| ctx.failure = 0; |
| ctx.new_hash = &new_hash; |
| clib_bihash_init_16_8 (&new_hash, "ip4-dr", new_nbuckets, |
| new_nbuckets * 1024); |
| clib_bihash_foreach_key_value_pair_16_8 (&ip4_full_reass_main.hash, |
| ip4_rehash_cb, &ctx); |
| if (ctx.failure) |
| { |
| clib_bihash_free_16_8 (&new_hash); |
| return -1; |
| } |
| else |
| { |
| clib_bihash_free_16_8 (&ip4_full_reass_main.hash); |
| clib_memcpy_fast (&ip4_full_reass_main.hash, &new_hash, |
| sizeof (ip4_full_reass_main.hash)); |
| clib_bihash_copied (&ip4_full_reass_main.hash, &new_hash); |
| } |
| } |
| return 0; |
| } |
| |
| vnet_api_error_t |
| ip4_full_reass_get (u32 * timeout_ms, u32 * max_reassemblies, |
| u32 * max_reassembly_length, |
| u32 * expire_walk_interval_ms) |
| { |
| *timeout_ms = ip4_full_reass_main.timeout_ms; |
| *max_reassemblies = ip4_full_reass_main.max_reass_n; |
| *max_reassembly_length = ip4_full_reass_main.max_reass_len; |
| *expire_walk_interval_ms = ip4_full_reass_main.expire_walk_interval_ms; |
| return 0; |
| } |
| |
| static clib_error_t * |
| ip4_full_reass_init_function (vlib_main_t * vm) |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| clib_error_t *error = 0; |
| u32 nbuckets; |
| vlib_node_t *node; |
| |
| rm->vlib_main = vm; |
| |
| vec_validate (rm->per_thread_data, vlib_num_workers ()); |
| ip4_full_reass_per_thread_t *rt; |
| vec_foreach (rt, rm->per_thread_data) |
| { |
| clib_spinlock_init (&rt->lock); |
| pool_alloc (rt->pool, rm->max_reass_n); |
| } |
| |
| node = vlib_get_node_by_name (vm, (u8 *) "ip4-full-reassembly-expire-walk"); |
| ASSERT (node); |
| rm->ip4_full_reass_expire_node_idx = node->index; |
| |
| ip4_full_reass_set_params (IP4_REASS_TIMEOUT_DEFAULT_MS, |
| IP4_REASS_MAX_REASSEMBLIES_DEFAULT, |
| IP4_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT, |
| IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS); |
| |
| nbuckets = ip4_full_reass_get_nbuckets (); |
| clib_bihash_init_16_8 (&rm->hash, "ip4-dr", nbuckets, nbuckets * 1024); |
| |
| rm->fq_index = vlib_frame_queue_main_init (ip4_full_reass_node.index, 0); |
| rm->fq_local_index = |
| vlib_frame_queue_main_init (ip4_local_full_reass_node.index, 0); |
| rm->fq_feature_index = |
| vlib_frame_queue_main_init (ip4_full_reass_node_feature.index, 0); |
| rm->fq_custom_index = |
| vlib_frame_queue_main_init (ip4_full_reass_node_custom.index, 0); |
| |
| rm->feature_use_refcount_per_intf = NULL; |
| rm->is_local_reass_enabled = 1; |
| |
| return error; |
| } |
| |
| VLIB_INIT_FUNCTION (ip4_full_reass_init_function); |
| #endif /* CLIB_MARCH_VARIANT */ |
| |
| static uword |
| ip4_full_reass_walk_expired (vlib_main_t *vm, vlib_node_runtime_t *node, |
| CLIB_UNUSED (vlib_frame_t *f)) |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| uword event_type, *event_data = 0; |
| |
| while (true) |
| { |
| vlib_process_wait_for_event_or_clock (vm, |
| (f64) |
| rm->expire_walk_interval_ms / |
| (f64) MSEC_PER_SEC); |
| event_type = vlib_process_get_events (vm, &event_data); |
| |
| switch (event_type) |
| { |
| case ~0: |
| /* no events => timeout */ |
| /* fallthrough */ |
| case IP4_EVENT_CONFIG_CHANGED: |
| /* nothing to do here */ |
| break; |
| default: |
| clib_warning ("BUG: event type 0x%wx", event_type); |
| break; |
| } |
| f64 now = vlib_time_now (vm); |
| |
| ip4_full_reass_t *reass; |
| int *pool_indexes_to_free = NULL; |
| |
| uword thread_index = 0; |
| int index; |
| const uword nthreads = vlib_num_workers () + 1; |
| |
| for (thread_index = 0; thread_index < nthreads; ++thread_index) |
| { |
| ip4_full_reass_per_thread_t *rt = |
| &rm->per_thread_data[thread_index]; |
| clib_spinlock_lock (&rt->lock); |
| |
| vec_reset_length (pool_indexes_to_free); |
| |
| /* Pace the number of timeouts handled per thread,to avoid barrier |
| * sync issues in real world scenarios */ |
| |
| u32 beg = rt->last_id; |
| /* to ensure we walk at least once per sec per context */ |
| u32 end = |
| beg + (IP4_REASS_MAX_REASSEMBLIES_DEFAULT * |
| IP4_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS / MSEC_PER_SEC + |
| 1); |
| if (end > vec_len (rt->pool)) |
| { |
| end = vec_len (rt->pool); |
| rt->last_id = 0; |
| } |
| else |
| { |
| rt->last_id = end; |
| } |
| |
| pool_foreach_stepping_index (index, beg, end, rt->pool) |
| { |
| reass = pool_elt_at_index (rt->pool, index); |
| if (now > reass->last_heard + rm->timeout) |
| { |
| vec_add1 (pool_indexes_to_free, index); |
| } |
| } |
| |
| if (vec_len (pool_indexes_to_free)) |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_ERROR_REASS_TIMEOUT, |
| vec_len (pool_indexes_to_free)); |
| int *i; |
| vec_foreach (i, pool_indexes_to_free) |
| { |
| ip4_full_reass_t *reass = pool_elt_at_index (rt->pool, i[0]); |
| ip4_full_reass_drop_all (vm, node, reass); |
| ip4_full_reass_free (rm, rt, reass); |
| } |
| |
| clib_spinlock_unlock (&rt->lock); |
| } |
| |
| vec_free (pool_indexes_to_free); |
| if (event_data) |
| { |
| vec_set_len (event_data, 0); |
| } |
| } |
| |
| return 0; |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_expire_node) = { |
| .function = ip4_full_reass_walk_expired, |
| .type = VLIB_NODE_TYPE_PROCESS, |
| .name = "ip4-full-reassembly-expire-walk", |
| .format_trace = format_ip4_full_reass_trace, |
| .n_errors = IP4_N_ERROR, |
| .error_counters = ip4_error_counters, |
| }; |
| |
| static u8 * |
| format_ip4_full_reass_key (u8 * s, va_list * args) |
| { |
| ip4_full_reass_key_t *key = va_arg (*args, ip4_full_reass_key_t *); |
| s = |
| format (s, "fib_index: %u, src: %U, dst: %U, frag_id: %u, proto: %u", |
| key->fib_index, format_ip4_address, &key->src, format_ip4_address, |
| &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto); |
| return s; |
| } |
| |
| static u8 * |
| format_ip4_reass (u8 * s, va_list * args) |
| { |
| vlib_main_t *vm = va_arg (*args, vlib_main_t *); |
| ip4_full_reass_t *reass = va_arg (*args, ip4_full_reass_t *); |
| |
| s = format (s, "ID: %lu, key: %U\n first_bi: %u, data_len: %u, " |
| "last_packet_octet: %u, trace_op_counter: %u\n", |
| reass->id, format_ip4_full_reass_key, &reass->key, |
| reass->first_bi, reass->data_len, |
| reass->last_packet_octet, reass->trace_op_counter); |
| |
| u32 bi = reass->first_bi; |
| u32 counter = 0; |
| while (~0 != bi) |
| { |
| vlib_buffer_t *b = vlib_get_buffer (vm, bi); |
| vnet_buffer_opaque_t *vnb = vnet_buffer (b); |
| s = |
| format (s, |
| " #%03u: range: [%u, %u], bi: %u, off: %d, len: %u, " |
| "fragment[%u, %u]\n", counter, vnb->ip.reass.range_first, |
| vnb->ip.reass.range_last, bi, |
| ip4_full_reass_buffer_get_data_offset (b), |
| ip4_full_reass_buffer_get_data_len (b), |
| vnb->ip.reass.fragment_first, vnb->ip.reass.fragment_last); |
| if (b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| { |
| bi = b->next_buffer; |
| } |
| else |
| { |
| bi = ~0; |
| } |
| } |
| return s; |
| } |
| |
| static clib_error_t * |
| show_ip4_reass (vlib_main_t * vm, |
| unformat_input_t * input, |
| CLIB_UNUSED (vlib_cli_command_t * lmd)) |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| |
| vlib_cli_output (vm, "---------------------"); |
| vlib_cli_output (vm, "IP4 reassembly status"); |
| vlib_cli_output (vm, "---------------------"); |
| bool details = false; |
| if (unformat (input, "details")) |
| { |
| details = true; |
| } |
| |
| u32 sum_reass_n = 0; |
| ip4_full_reass_t *reass; |
| uword thread_index; |
| const uword nthreads = vlib_num_workers () + 1; |
| for (thread_index = 0; thread_index < nthreads; ++thread_index) |
| { |
| ip4_full_reass_per_thread_t *rt = &rm->per_thread_data[thread_index]; |
| clib_spinlock_lock (&rt->lock); |
| if (details) |
| { |
| pool_foreach (reass, rt->pool) { |
| vlib_cli_output (vm, "%U", format_ip4_reass, vm, reass); |
| } |
| } |
| sum_reass_n += rt->reass_n; |
| clib_spinlock_unlock (&rt->lock); |
| } |
| vlib_cli_output (vm, "---------------------"); |
| vlib_cli_output (vm, "Current full IP4 reassemblies count: %lu\n", |
| (long unsigned) sum_reass_n); |
| vlib_cli_output (vm, |
| "Maximum configured concurrent full IP4 reassemblies per worker-thread: %lu\n", |
| (long unsigned) rm->max_reass_n); |
| vlib_cli_output (vm, |
| "Maximum configured amount of fragments " |
| "per full IP4 reassembly: %lu\n", |
| (long unsigned) rm->max_reass_len); |
| vlib_cli_output (vm, |
| "Maximum configured full IP4 reassembly timeout: %lums\n", |
| (long unsigned) rm->timeout_ms); |
| vlib_cli_output (vm, |
| "Maximum configured full IP4 reassembly expire walk interval: %lums\n", |
| (long unsigned) rm->expire_walk_interval_ms); |
| return 0; |
| } |
| |
| VLIB_CLI_COMMAND (show_ip4_full_reass_cmd, static) = { |
| .path = "show ip4-full-reassembly", |
| .short_help = "show ip4-full-reassembly [details]", |
| .function = show_ip4_reass, |
| }; |
| |
| #ifndef CLIB_MARCH_VARIANT |
| vnet_api_error_t |
| ip4_full_reass_enable_disable (u32 sw_if_index, u8 enable_disable) |
| { |
| return vnet_feature_enable_disable ("ip4-unicast", |
| "ip4-full-reassembly-feature", |
| sw_if_index, enable_disable, 0, 0); |
| } |
| #endif /* CLIB_MARCH_VARIANT */ |
| |
| |
| #define foreach_ip4_full_reass_handoff_error \ |
| _(CONGESTION_DROP, "congestion drop") |
| |
| |
| typedef enum |
| { |
| #define _(sym,str) IP4_FULL_REASS_HANDOFF_ERROR_##sym, |
| foreach_ip4_full_reass_handoff_error |
| #undef _ |
| IP4_FULL_REASS_HANDOFF_N_ERROR, |
| } ip4_full_reass_handoff_error_t; |
| |
| static char *ip4_full_reass_handoff_error_strings[] = { |
| #define _(sym,string) string, |
| foreach_ip4_full_reass_handoff_error |
| #undef _ |
| }; |
| |
| typedef struct |
| { |
| u32 next_worker_index; |
| } ip4_full_reass_handoff_trace_t; |
| |
| static u8 * |
| format_ip4_full_reass_handoff_trace (u8 * s, 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 *); |
| ip4_full_reass_handoff_trace_t *t = |
| va_arg (*args, ip4_full_reass_handoff_trace_t *); |
| |
| s = |
| format (s, "ip4-full-reassembly-handoff: next-worker %d", |
| t->next_worker_index); |
| |
| return s; |
| } |
| |
| always_inline uword |
| ip4_full_reass_handoff_node_inline (vlib_main_t *vm, vlib_node_runtime_t *node, |
| vlib_frame_t *frame, |
| ip4_full_reass_node_type_t type, |
| bool is_local) |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| |
| vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; |
| u32 n_enq, n_left_from, *from; |
| u16 thread_indices[VLIB_FRAME_SIZE], *ti; |
| u32 fq_index; |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| vlib_get_buffers (vm, from, bufs, n_left_from); |
| |
| b = bufs; |
| ti = thread_indices; |
| |
| switch (type) |
| { |
| case NORMAL: |
| if (is_local) |
| { |
| fq_index = rm->fq_local_index; |
| } |
| else |
| { |
| fq_index = rm->fq_index; |
| } |
| break; |
| case FEATURE: |
| fq_index = rm->fq_feature_index; |
| break; |
| case CUSTOM: |
| fq_index = rm->fq_custom_index; |
| break; |
| default: |
| clib_warning ("Unexpected `type' (%d)!", type); |
| } |
| |
| while (n_left_from > 0) |
| { |
| ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index; |
| |
| if (PREDICT_FALSE |
| ((node->flags & VLIB_NODE_FLAG_TRACE) |
| && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) |
| { |
| ip4_full_reass_handoff_trace_t *t = |
| vlib_add_trace (vm, node, b[0], sizeof (*t)); |
| t->next_worker_index = ti[0]; |
| } |
| |
| n_left_from -= 1; |
| ti += 1; |
| b += 1; |
| } |
| n_enq = vlib_buffer_enqueue_to_thread (vm, node, fq_index, from, |
| thread_indices, frame->n_vectors, 1); |
| |
| if (n_enq < frame->n_vectors) |
| vlib_node_increment_counter (vm, node->node_index, |
| IP4_FULL_REASS_HANDOFF_ERROR_CONGESTION_DROP, |
| frame->n_vectors - n_enq); |
| return frame->n_vectors; |
| } |
| |
| VLIB_NODE_FN (ip4_full_reass_handoff_node) (vlib_main_t * vm, |
| vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_handoff_node_inline (vm, node, frame, NORMAL, |
| false /* is_local */); |
| } |
| |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_handoff_node) = { |
| .name = "ip4-full-reassembly-handoff", |
| .vector_size = sizeof (u32), |
| .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings), |
| .error_strings = ip4_full_reass_handoff_error_strings, |
| .format_trace = format_ip4_full_reass_handoff_trace, |
| |
| .n_next_nodes = 1, |
| |
| .next_nodes = { |
| [0] = "error-drop", |
| }, |
| }; |
| |
| VLIB_NODE_FN (ip4_local_full_reass_handoff_node) |
| (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) |
| { |
| return ip4_full_reass_handoff_node_inline (vm, node, frame, NORMAL, |
| true /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_local_full_reass_handoff_node) = { |
| .name = "ip4-local-full-reassembly-handoff", |
| .vector_size = sizeof (u32), |
| .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings), |
| .error_strings = ip4_full_reass_handoff_error_strings, |
| .format_trace = format_ip4_full_reass_handoff_trace, |
| |
| .n_next_nodes = 1, |
| |
| .next_nodes = { |
| [0] = "error-drop", |
| }, |
| }; |
| |
| VLIB_NODE_FN (ip4_full_reass_feature_handoff_node) (vlib_main_t * vm, |
| vlib_node_runtime_t * |
| node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_handoff_node_inline (vm, node, frame, FEATURE, |
| false /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_feature_handoff_node) = { |
| .name = "ip4-full-reass-feature-hoff", |
| .vector_size = sizeof (u32), |
| .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings), |
| .error_strings = ip4_full_reass_handoff_error_strings, |
| .format_trace = format_ip4_full_reass_handoff_trace, |
| |
| .n_next_nodes = 1, |
| |
| .next_nodes = { |
| [0] = "error-drop", |
| }, |
| }; |
| |
| VLIB_NODE_FN (ip4_full_reass_custom_handoff_node) (vlib_main_t * vm, |
| vlib_node_runtime_t * |
| node, |
| vlib_frame_t * frame) |
| { |
| return ip4_full_reass_handoff_node_inline (vm, node, frame, CUSTOM, |
| false /* is_local */); |
| } |
| |
| VLIB_REGISTER_NODE (ip4_full_reass_custom_handoff_node) = { |
| .name = "ip4-full-reass-custom-hoff", |
| .vector_size = sizeof (u32), |
| .n_errors = ARRAY_LEN(ip4_full_reass_handoff_error_strings), |
| .error_strings = ip4_full_reass_handoff_error_strings, |
| .format_trace = format_ip4_full_reass_handoff_trace, |
| |
| .n_next_nodes = 1, |
| |
| .next_nodes = { |
| [0] = "error-drop", |
| }, |
| }; |
| |
| #ifndef CLIB_MARCH_VARIANT |
| int |
| ip4_full_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable) |
| { |
| ip4_full_reass_main_t *rm = &ip4_full_reass_main; |
| vec_validate (rm->feature_use_refcount_per_intf, sw_if_index); |
| if (is_enable) |
| { |
| if (!rm->feature_use_refcount_per_intf[sw_if_index]) |
| { |
| ++rm->feature_use_refcount_per_intf[sw_if_index]; |
| return vnet_feature_enable_disable ("ip4-unicast", |
| "ip4-full-reassembly-feature", |
| sw_if_index, 1, 0, 0); |
| } |
| ++rm->feature_use_refcount_per_intf[sw_if_index]; |
| } |
| else |
| { |
| --rm->feature_use_refcount_per_intf[sw_if_index]; |
| if (!rm->feature_use_refcount_per_intf[sw_if_index]) |
| return vnet_feature_enable_disable ("ip4-unicast", |
| "ip4-full-reassembly-feature", |
| sw_if_index, 0, 0, 0); |
| } |
| return -1; |
| } |
| |
| void |
| ip4_local_full_reass_enable_disable (int enable) |
| { |
| if (enable) |
| { |
| ip4_full_reass_main.is_local_reass_enabled = 1; |
| } |
| else |
| { |
| ip4_full_reass_main.is_local_reass_enabled = 0; |
| } |
| } |
| |
| int |
| ip4_local_full_reass_enabled () |
| { |
| return ip4_full_reass_main.is_local_reass_enabled; |
| } |
| |
| #endif |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |