diff options
Diffstat (limited to 'src/plugins/oddbuf/node.c')
| -rw-r--r-- | src/plugins/oddbuf/node.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/src/plugins/oddbuf/node.c b/src/plugins/oddbuf/node.c new file mode 100644 index 00000000000..d495abaf950 --- /dev/null +++ b/src/plugins/oddbuf/node.c @@ -0,0 +1,215 @@ +/* + * node.c - skeleton vpp engine plug-in dual-loop node skeleton + * + * Copyright (c) <current-year> <your-organization> + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> +#include <oddbuf/oddbuf.h> + +typedef struct +{ + u32 sw_if_index; + u32 next_index; + u16 udp_checksum; +} oddbuf_trace_t; + +#ifndef CLIB_MARCH_VARIANT + +/* packet trace format function */ +static u8 * +format_oddbuf_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 *); + oddbuf_trace_t *t = va_arg (*args, oddbuf_trace_t *); + + s = format (s, "ODDBUF: sw_if_index %d, next index %d, udp checksum %04x\n", + t->sw_if_index, t->next_index, (u32) t->udp_checksum); + return s; +} + +vlib_node_registration_t oddbuf_node; + +#endif /* CLIB_MARCH_VARIANT */ + +#define foreach_oddbuf_error \ +_(SWAPPED, "Mac swap packets processed") + +typedef enum +{ +#define _(sym,str) ODDBUF_ERROR_##sym, + foreach_oddbuf_error +#undef _ + ODDBUF_N_ERROR, +} oddbuf_error_t; + +#ifndef CLIB_MARCH_VARIANT +static char *oddbuf_error_strings[] = { +#define _(sym,string) string, + foreach_oddbuf_error +#undef _ +}; +#endif /* CLIB_MARCH_VARIANT */ + +typedef enum +{ + ODDBUF_NEXT_DROP, + ODDBUF_N_NEXT, +} oddbuf_next_t; + + +always_inline uword +oddbuf_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame, + int is_ip4, int is_trace) +{ + oddbuf_main_t *om = &oddbuf_main; + u32 n_left_from, *from; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + vlib_buffer_t *b0, *b0next; + u32 bi; + u16 nexts[VLIB_FRAME_SIZE], *next; + u16 save_current_length; + u32 next0; + u8 *src, *dst; + int i; + ethernet_header_t *eh; + ip4_header_t *ip; + udp_header_t *udp; + + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + + vlib_get_buffers (vm, from, bufs, n_left_from); + b = bufs; + next = nexts; + + while (n_left_from > 0) + { + b0 = b[0]; + vnet_feature_next (&next0, b0); + nexts[0] = next0; + + if (vlib_buffer_alloc (vm, &bi, 1) != 1) + { + clib_warning ("Buffer alloc fail, skipping"); + goto skip; + } + + if (om->first_chunk_offset) + { + memmove (b0->data + b0->current_data + om->first_chunk_offset, + b0->data + b0->current_data, b0->current_length); + b0->current_data += om->first_chunk_offset; + } + + eh = vlib_buffer_get_current (b0); + ip = (ip4_header_t *) (eh + 1); + udp = (udp_header_t *) (ip4_next_header (ip)); + + if (1) + { + save_current_length = vlib_buffer_length_in_chain (vm, b0); + + b0next = vlib_get_buffer (vm, bi); + b0->flags |= VLIB_BUFFER_NEXT_PRESENT; + b0->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID; + b0->next_buffer = bi; + + src = b0->data + b0->current_data + b0->current_length - + om->n_to_copy; + b0next->current_data = om->second_chunk_offset; + b0next->current_length = om->n_to_copy; + dst = b0next->data + b0next->current_data; + + for (i = 0; i < om->n_to_copy; i++) + dst[i] = src[i]; + + b0->current_length -= om->n_to_copy; + b0next->current_length = om->n_to_copy; + + if (vlib_buffer_length_in_chain (vm, b0) != save_current_length) + clib_warning ("OOPS, length incorrect after chunk split..."); + } + + udp->checksum = 0; + udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip); + + if (is_trace) + { + if (b[0]->flags & VLIB_BUFFER_IS_TRACED) + { + oddbuf_trace_t *t = + vlib_add_trace (vm, node, b[0], sizeof (*t)); + t->next_index = next[0]; + t->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; + t->udp_checksum = clib_net_to_host_u16 (udp->checksum); + } + } + + skip: + b += 1; + next += 1; + n_left_from -= 1; + } + + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + + return frame->n_vectors; +} + +VLIB_NODE_FN (oddbuf_node) (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) + return oddbuf_inline (vm, node, frame, 1 /* is_ip4 */ , + 1 /* is_trace */ ); + else + return oddbuf_inline (vm, node, frame, 1 /* is_ip4 */ , + 0 /* is_trace */ ); +} + +/* *INDENT-OFF* */ +#ifndef CLIB_MARCH_VARIANT +VLIB_REGISTER_NODE (oddbuf_node) = +{ + .name = "oddbuf", + .vector_size = sizeof (u32), + .format_trace = format_oddbuf_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(oddbuf_error_strings), + .error_strings = oddbuf_error_strings, + + .n_next_nodes = ODDBUF_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [ODDBUF_NEXT_DROP] = "error-drop", + }, +}; +#endif /* CLIB_MARCH_VARIANT */ +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |