diff options
Diffstat (limited to 'nsh-plugin/nsh/nsh.c')
| -rw-r--r-- | nsh-plugin/nsh/nsh.c | 895 |
1 files changed, 895 insertions, 0 deletions
diff --git a/nsh-plugin/nsh/nsh.c b/nsh-plugin/nsh/nsh.c new file mode 100644 index 0000000..e6bc761 --- /dev/null +++ b/nsh-plugin/nsh/nsh.c @@ -0,0 +1,895 @@ +/* + * nsh.c - nsh mapping + * + * Copyright (c) 2013 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 <vnet/vnet.h> +#include <vnet/plugin/plugin.h> +#include <nsh/nsh.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vlibsocket/api.h> + +/* define message IDs */ +#include <nsh/nsh_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <nsh/nsh_all_api_h.h> +#undef vl_typedefs + +/* define generated endian-swappers */ +#define vl_endianfun +#include <nsh/nsh_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include <nsh/nsh_all_api_h.h> +#undef vl_printfun + +/* Get the API version number */ +#define vl_api_version(n,v) static u32 api_version=(v); +#include <nsh/nsh_all_api_h.h> +#undef vl_api_version + +/* + * A handy macro to set up a message reply. + * Assumes that the following variables are available: + * mp - pointer to request message + * rmp - pointer to reply message type + * rv - return value + */ + +#define REPLY_MACRO(t) \ +do { \ + unix_shared_memory_queue_t * q = \ + vl_api_client_index_to_input_queue (mp->client_index); \ + if (!q) \ + return; \ + \ + rmp = vl_msg_api_alloc (sizeof (*rmp)); \ + rmp->_vl_msg_id = ntohs((t)+nm->msg_id_base); \ + rmp->context = mp->context; \ + rmp->retval = ntohl(rv); \ + \ + vl_msg_api_send_shmem (q, (u8 *)&rmp); \ +} while(0); + +/* List of message types that this plugin understands */ + +#define foreach_nsh_plugin_api_msg \ +_(NSH_ADD_DEL_ENTRY, nsh_add_del_entry) \ +_(NSH_ADD_DEL_MAP, nsh_add_del_map) + +clib_error_t * +vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h, + int from_early_init) +{ + nsh_main_t * nm = &nsh_main; + clib_error_t * error = 0; + + nm->vlib_main = vm; + nm->vnet_main = h->vnet_main; + + return error; +} + +typedef struct { + nsh_header_t nsh_header; +} nsh_input_trace_t; + +u8 * format_nsh_header (u8 * s, va_list * args) +{ + nsh_header_t * nsh = va_arg (*args, nsh_header_t *); + + s = format (s, "nsh ver %d ", (nsh->ver_o_c>>6)); + if (nsh->ver_o_c & NSH_O_BIT) + s = format (s, "O-set "); + + if (nsh->ver_o_c & NSH_C_BIT) + s = format (s, "C-set "); + + s = format (s, "len %d (%d bytes) md_type %d next_protocol %d\n", + nsh->length, nsh->length * 4, nsh->md_type, nsh->next_protocol); + + s = format (s, " service path %d service index %d\n", + (nsh->nsp_nsi>>NSH_NSP_SHIFT) & NSH_NSP_MASK, + nsh->nsp_nsi & NSH_NSI_MASK); + + s = format (s, " c1 %d c2 %d c3 %d c4 %d\n", + nsh->c1, nsh->c2, nsh->c3, nsh->c4); + + return s; +} + +u8 * format_nsh_map (u8 * s, va_list * args) +{ + nsh_map_t * map = va_arg (*args, nsh_map_t *); + + s = format (s, "nsh entry nsp: %d nsi: %d ", + (map->nsp_nsi>>NSH_NSP_SHIFT) & NSH_NSP_MASK, + map->nsp_nsi & NSH_NSI_MASK); + s = format (s, "maps to nsp: %d nsi: %d ", + (map->mapped_nsp_nsi>>NSH_NSP_SHIFT) & NSH_NSP_MASK, + map->mapped_nsp_nsi & NSH_NSI_MASK); + + switch (map->next_node) + { + case NSH_INPUT_NEXT_ENCAP_GRE: + { + s = format (s, "encapped by GRE intf: %d", map->sw_if_index); + break; + } + case NSH_INPUT_NEXT_ENCAP_VXLANGPE: + { + s = format (s, "encapped by VXLAN GPE intf: %d", map->sw_if_index); + break; + } + default: + s = format (s, "only GRE and VXLANGPE support in this rev"); + } + + return s; +} + +u8 * format_nsh_header_with_length (u8 * s, va_list * args) +{ + nsh_header_t * h = va_arg (*args, nsh_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + u32 tmp, header_bytes; + + header_bytes = sizeof (h[0]); + if (max_header_bytes != 0 && header_bytes > max_header_bytes) + return format (s, "nsh header truncated"); + + tmp = clib_net_to_host_u32 (h->nsp_nsi); + s = format (s, " nsp %d nsi %d ", + (tmp>>NSH_NSP_SHIFT) & NSH_NSP_MASK, + tmp & NSH_NSI_MASK); + + s = format (s, "c1 %u c2 %u c3 %u c4 %u", + clib_net_to_host_u32 (h->c1), + clib_net_to_host_u32 (h->c2), + clib_net_to_host_u32 (h->c3), + clib_net_to_host_u32 (h->c4)); + + s = format (s, "ver %d ", h->ver_o_c>>6); + + if (h->ver_o_c & NSH_O_BIT) + s = format (s, "O-set "); + + if (h->ver_o_c & NSH_C_BIT) + s = format (s, "C-set "); + + s = format (s, "len %d (%d bytes) md_type %d next_protocol %d\n", + h->length, h->length * 4, h->md_type, h->next_protocol); + return s; +} + +u8 * format_nsh_input_map_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 *); + nsh_input_trace_t * t + = va_arg (*args, nsh_input_trace_t *); + + s = format (s, "\n %U", format_nsh_header, &t->nsh_header, + (u32) sizeof (t->nsh_header) ); + + return s; +} + +/** + * Action function to add or del an nsh map. + * Shared by both CLI and binary API + **/ + +int nsh_add_del_map (nsh_add_del_map_args_t *a) +{ + nsh_main_t * nm = &nsh_main; + nsh_map_t *map = 0; + u32 key, *key_copy; + uword * entry; + hash_pair_t *hp; + + key = a->map.nsp_nsi; + + entry = hash_get_mem (nm->nsh_mapping_by_key, &key); + + if (a->is_add) + { + /* adding an entry, must not already exist */ + if (entry) + return -1; //TODO API_ERROR_INVALID_VALUE; + + pool_get_aligned (nm->nsh_mappings, map, CLIB_CACHE_LINE_BYTES); + memset (map, 0, sizeof (*map)); + + /* copy from arg structure */ + map->nsp_nsi = a->map.nsp_nsi; + map->mapped_nsp_nsi = a->map.mapped_nsp_nsi; + map->sw_if_index = a->map.sw_if_index; + map->next_node = a->map.next_node; + + + key_copy = clib_mem_alloc (sizeof (*key_copy)); + clib_memcpy (key_copy, &key, sizeof (*key_copy)); + + hash_set_mem (nm->nsh_mapping_by_key, key_copy, + map - nm->nsh_mappings); + } + else + { + if (!entry) + return -2 ; //TODO API_ERROR_NO_SUCH_ENTRY; + + map = pool_elt_at_index (nm->nsh_mappings, entry[0]); + hp = hash_get_pair (nm->nsh_mapping_by_key, &key); + key_copy = (void *)(hp->key); + hash_unset_mem (nm->nsh_mapping_by_key, &key); + clib_mem_free (key_copy); + + pool_put (nm->nsh_mappings, map); + } + + return 0; +} + +/** + * CLI command for NSH map +*/ + + +static clib_error_t * +nsh_add_del_map_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, * line_input = &_line_input; + u8 is_add = 1; + u32 nsp, nsi, mapped_nsp, mapped_nsi; + int nsp_set = 0, nsi_set = 0, mapped_nsp_set = 0, mapped_nsi_set = 0; + u32 next_node = ~0; + u32 sw_if_index = ~0; // temporary requirement to get this moved over to NSHSFC + nsh_add_del_map_args_t _a, * a = &_a; + int rv; + + /* Get a line of input. */ + if (! unformat_user (input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat (line_input, "del")) + is_add = 0; + else if (unformat (line_input, "nsp %d", &nsp)) + nsp_set = 1; + else if (unformat (line_input, "nsi %d", &nsi)) + nsi_set = 1; + else if (unformat (line_input, "mapped-nsp %d", &mapped_nsp)) + mapped_nsp_set = 1; + else if (unformat (line_input, "mapped-nsi %d", &mapped_nsi)) + mapped_nsi_set = 1; + else if (unformat (line_input, "encap-gre-intf %d", &sw_if_index)) + next_node = NSH_INPUT_NEXT_ENCAP_GRE; + else if (unformat (line_input, "encap-vxlan-gpe-intf %d", &sw_if_index)) + next_node = NSH_INPUT_NEXT_ENCAP_VXLANGPE; + else if (unformat (line_input, "encap-none")) + next_node = NSH_INPUT_NEXT_DROP; // Once moved to NSHSFC see nsh.h:foreach_nsh_input_next to handle this case + else + return clib_error_return (0, "parse error: '%U'", + format_unformat_error, line_input); + } + + unformat_free (line_input); + + if (nsp_set == 0 || nsi_set == 0) + return clib_error_return (0, "nsp nsi pair required. Key: for NSH entry"); + + if (mapped_nsp_set == 0 || mapped_nsi_set == 0) + return clib_error_return (0, "mapped-nsp mapped-nsi pair required. Key: for NSH entry"); + + if (next_node == ~0) + return clib_error_return (0, "must specific action: [encap-gre-intf <nn> | encap-vxlan-gpe-intf <nn> | encap-none]"); + + memset (a, 0, sizeof (*a)); + + /* set args structure */ + a->is_add = is_add; + a->map.nsp_nsi = (nsp<< NSH_NSP_SHIFT) | nsi; + a->map.mapped_nsp_nsi = (mapped_nsp<< NSH_NSP_SHIFT) | mapped_nsi; + a->map.sw_if_index = sw_if_index; + a->map.next_node = next_node; + + + rv = nsh_add_del_map (a); + + switch(rv) + { + case 0: + break; + case -1: //TODO API_ERROR_INVALID_VALUE: + return clib_error_return (0, "mapping already exists. Remove it first."); + + case -2: // TODO API_ERROR_NO_SUCH_ENTRY: + return clib_error_return (0, "mapping does not exist."); + + default: + return clib_error_return + (0, "nsh_add_del_map returned %d", rv); + } + return 0; +} + +VLIB_CLI_COMMAND (create_nsh_map_command, static) = { + .path = "create nsh map", + .short_help = + "create nsh map nsp <nn> nsi <nn> [del] map-nsp <nn> map-nsi <nn> [encap-gre-intf <nn> | encap-vxlan-gpe-intf <nn> | encap-none]\n", + .function = nsh_add_del_map_command_fn, +}; + +/** API message handler */ +static void vl_api_nsh_add_del_map_t_handler +(vl_api_nsh_add_del_map_t * mp) +{ + vl_api_nsh_add_del_map_reply_t * rmp; + nsh_main_t * nm = &nsh_main; + int rv; + nsh_add_del_map_args_t *a = 0; + + rv = nsh_add_del_map (a); + + REPLY_MACRO(VL_API_NSH_ADD_DEL_MAP_REPLY); +} + +/** + * CLI command for showing the mapping between NSH entries + */ +static clib_error_t * +show_nsh_map_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + nsh_main_t * nm = &nsh_main; + nsh_map_t * map; + + if (pool_elts (nm->nsh_mappings) == 0) + vlib_cli_output (vm, "No nsh maps configured."); + + pool_foreach (map, nm->nsh_mappings, + ({ + vlib_cli_output (vm, "%U", format_nsh_map, map); + })); + + return 0; +} + +VLIB_CLI_COMMAND (show_nsh_map_command, static) = { + .path = "show nsh map", + .function = show_nsh_map_command_fn, +}; + +/** + * Action function for adding an NSH entry + */ + +int nsh_add_del_entry (nsh_add_del_entry_args_t *a) +{ + nsh_main_t * nm = &nsh_main; + nsh_header_t *hdr = 0; + u32 key, *key_copy; + uword * entry; + hash_pair_t *hp; + + key = a->nsh.nsp_nsi; + + entry = hash_get_mem (nm->nsh_entry_by_key, &key); + + if (a->is_add) + { + /* adding an entry, must not already exist */ + if (entry) + return -1; // TODO VNET_API_ERROR_INVALID_VALUE; + + pool_get_aligned (nm->nsh_entries, hdr, CLIB_CACHE_LINE_BYTES); + memset (hdr, 0, sizeof (*hdr)); + + /* copy from arg structure */ +#define _(x) hdr->x = a->nsh.x; + foreach_copy_nshhdr_field; +#undef _ + + key_copy = clib_mem_alloc (sizeof (*key_copy)); + clib_memcpy (key_copy, &key, sizeof (*key_copy)); + + hash_set_mem (nm->nsh_entry_by_key, key_copy, + hdr - nm->nsh_entries); + } + else + { + if (!entry) + return -2; //TODO API_ERROR_NO_SUCH_ENTRY; + + hdr = pool_elt_at_index (nm->nsh_entries, entry[0]); + hp = hash_get_pair (nm->nsh_entry_by_key, &key); + key_copy = (void *)(hp->key); + hash_unset_mem (nm->nsh_entry_by_key, &key); + clib_mem_free (key_copy); + + pool_put (nm->nsh_entries, hdr); + } + + return 0; +} + + +/** + * CLI command for adding NSH entry + */ + +static clib_error_t * +nsh_add_del_entry_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, * line_input = &_line_input; + u8 is_add = 1; + u8 ver_o_c = 0; + u8 length = 0; + u8 md_type = 0; + u8 next_protocol = 1; /* default: ip4 */ + u32 nsp; + u8 nsp_set = 0; + u32 nsi; + u8 nsi_set = 0; + u32 nsp_nsi; + u32 c1 = 0; + u32 c2 = 0; + u32 c3 = 0; + u32 c4 = 0; + u32 *tlvs = 0; + u32 tmp; + int rv; + nsh_add_del_entry_args_t _a, * a = &_a; + + /* Get a line of input. */ + if (! unformat_user (input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { + if (unformat (line_input, "del")) + is_add = 0; + else if (unformat (line_input, "version %d", &tmp)) + ver_o_c |= (tmp & 3) << 6; + else if (unformat (line_input, "o-bit %d", &tmp)) + ver_o_c |= (tmp & 1) << 5; + else if (unformat (line_input, "c-bit %d", &tmp)) + ver_o_c |= (tmp & 1) << 4; + else if (unformat (line_input, "md-type %d", &tmp)) + md_type = tmp; + else if (unformat(line_input, "next-ip4")) + next_protocol = 1; + else if (unformat(line_input, "next-ip6")) + next_protocol = 2; + else if (unformat(line_input, "next-ethernet")) + next_protocol = 3; + else if (unformat (line_input, "c1 %d", &c1)) + ; + else if (unformat (line_input, "c2 %d", &c2)) + ; + else if (unformat (line_input, "c3 %d", &c3)) + ; + else if (unformat (line_input, "c4 %d", &c4)) + ; + else if (unformat (line_input, "nsp %d", &nsp)) + nsp_set = 1; + else if (unformat (line_input, "nsi %d", &nsi)) + nsi_set = 1; + else if (unformat (line_input, "tlv %x")) + vec_add1 (tlvs, tmp); + else + return clib_error_return (0, "parse error: '%U'", + format_unformat_error, line_input); + } + + unformat_free (line_input); + + if (nsp_set == 0) + return clib_error_return (0, "nsp not specified"); + + if (nsi_set == 0) + return clib_error_return (0, "nsi not specified"); + + if (md_type != 1) + return clib_error_return (0, "md-type 1 only supported at this time"); + + md_type = 1; + length = 6; + + nsp_nsi = (nsp<<8) | nsi; + + memset (a, 0, sizeof (*a)); + + a->is_add = is_add; + +#define _(x) a->nsh.x = x; + foreach_copy_nshhdr_field; +#undef _ + + a->nsh.tlvs[0] = 0 ; // TODO FIXME this shouldn't be set 0 - in NSH_SFC project + + rv = nsh_add_del_entry (a); + + switch(rv) + { + case 0: + break; + default: + return clib_error_return + (0, "nsh_add_del_entry returned %d", rv); + } + + return 0; +} + +VLIB_CLI_COMMAND (create_nsh_entry_command, static) = { + .path = "create nsh entry", + .short_help = + "create nsh entry {nsp <nn> nsi <nn>} c1 <nn> c2 <nn> c3 <nn> c4 <nn>" + " [md-type <nn>] [tlv <xx>] [del]\n", + .function = nsh_add_del_entry_command_fn, +}; + +/** API message handler */ +static void vl_api_nsh_add_del_entry_t_handler +(vl_api_nsh_add_del_entry_t * mp) +{ + vl_api_nsh_add_del_entry_reply_t * rmp; + nsh_main_t * nm = &nsh_main; + int rv; + nsh_add_del_entry_args_t *a = 0; + + rv = nsh_add_del_entry (a); + + REPLY_MACRO(VL_API_NSH_ADD_DEL_ENTRY_REPLY); +} + +static clib_error_t * +show_nsh_entry_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + nsh_main_t * nm = &nsh_main; + nsh_header_t * hdr; + + if (pool_elts (nm->nsh_entries) == 0) + vlib_cli_output (vm, "No nsh entries configured."); + + pool_foreach (hdr, nm->nsh_entries, + ({ + vlib_cli_output (vm, "%U", format_nsh_header, hdr); + })); + + return 0; +} + +VLIB_CLI_COMMAND (show_nsh_entry_command, static) = { + .path = "show nsh entry", + .function = show_nsh_entry_command_fn, +}; + + +/* Set up the API message handling tables */ +static clib_error_t * +nsh_plugin_api_hookup (vlib_main_t *vm) +{ + nsh_main_t * nm = &nsh_main; +#define _(N,n) \ + vl_msg_api_set_handlers((VL_API_##N + nm->msg_id_base), \ + #n, \ + vl_api_##n##_t_handler, \ + vl_noop_handler, \ + vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, \ + sizeof(vl_api_##n##_t), 1); + foreach_nsh_plugin_api_msg; +#undef _ + + return 0; +} + +clib_error_t *nsh_init (vlib_main_t *vm) +{ + nsh_main_t *nm = &nsh_main; + clib_error_t * error = 0; + u8 * name; + + nm->nsh_mapping_by_key + = hash_create_mem (0, sizeof(u32), sizeof (uword)); + + nm->nsh_mapping_by_mapped_key + = hash_create_mem (0, sizeof(u32), sizeof (uword)); + + nm->nsh_entry_by_key + = hash_create_mem (0, sizeof(u32), sizeof (uword)); + + name = format (0, "nsh_%08x%c", api_version, 0); + + + nm->msg_id_base = vl_msg_api_get_msg_ids + ((char *) name, VL_MSG_FIRST_AVAILABLE); + + error = nsh_plugin_api_hookup (vm); + + vec_free(name); + + return error; +} + +VLIB_INIT_FUNCTION(nsh_init); + + + +static uword +nsh_input_map (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + nsh_main_t * nm = &nsh_main; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + u32 next0 = NSH_INPUT_NEXT_DROP, next1 = NSH_INPUT_NEXT_DROP; + uword * entry0, * entry1; + nsh_header_t * hdr0 = 0, * hdr1 = 0; + u32 nsp_nsi0, nsp_nsi1; + u32 error0, error1; + nsh_map_t * map0 = 0, * map1 = 0; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = from[0]; + bi1 = from[1]; + to_next[0] = bi0; + to_next[1] = bi1; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + error0 = 0; + error1 = 0; + + b0 = vlib_get_buffer (vm, bi0); + hdr0 = vlib_buffer_get_current (b0); + nsp_nsi0 = clib_net_to_host_u32(hdr0->nsp_nsi); + entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0); + + b1 = vlib_get_buffer (vm, bi1); + hdr1 = vlib_buffer_get_current (b1); + nsp_nsi1 = clib_net_to_host_u32(hdr1->nsp_nsi); + entry1 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi1); + + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace0; + } + + if (PREDICT_FALSE(entry1 == 0)) + { + error1 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace1; + } + + /* Entry should point to a mapping ...*/ + map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]); + map1 = pool_elt_at_index (nm->nsh_mappings, entry1[0]); + + if (PREDICT_FALSE(map0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace0; + } + + if (PREDICT_FALSE(map1 == 0)) + { + error1 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace1; + } + + entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); + entry1 = hash_get_mem (nm->nsh_entry_by_key, &map1->mapped_nsp_nsi); + + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace0; + } + if (PREDICT_FALSE(entry1 == 0)) + { + error1 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace1; + } + + hdr0 = pool_elt_at_index (nm->nsh_entries, entry0[0]); + hdr1 = pool_elt_at_index (nm->nsh_entries, entry1[0]); + + /* set up things for next node to transmit ie which node to handle it and where */ + next0 = map0->next_node; + next1 = map1->next_node; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; + vnet_buffer(b1)->sw_if_index[VLIB_TX] = map1->sw_if_index; + + trace0: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->nsh_header = *hdr0; + } + + trace1: + b1->error = error1 ? node->errors[error1] : 0; + + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = + vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->nsh_header = *hdr1; + } + + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0 = NSH_INPUT_NEXT_DROP; + uword * entry0; + nsh_header_t * hdr0 = 0; + u32 nsp_nsi0; + u32 error0; + nsh_map_t * map0 = 0; + + next_index = next0; + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + error0 = 0; + + b0 = vlib_get_buffer (vm, bi0); + hdr0 = vlib_buffer_get_current (b0); + nsp_nsi0 = clib_net_to_host_u32(hdr0->nsp_nsi); + entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0); + + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace00; + } + + /* Entry should point to a mapping ...*/ + map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]); + + if (PREDICT_FALSE(map0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace00; + } + + entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); + + if (PREDICT_FALSE(entry0 == 0)) + { + error0 = NSH_INPUT_ERROR_NO_MAPPING; + goto trace00; + } + + hdr0 = pool_elt_at_index (nm->nsh_entries, entry0[0]); + + /* set up things for next node to transmit ie which node to handle it and where */ + next0 = map0->next_node; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; + + trace00: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_input_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->nsh_header = *hdr0; + } + + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + + } + + + return from_frame->n_vectors; +} + + +static char * nsh_input_error_strings[] = { +#define _(sym,string) string, + foreach_nsh_input_error +#undef _ +}; + +VLIB_REGISTER_NODE (nsh_input_node) = { + .function = nsh_input_map, + .name = "nsh-input", + .vector_size = sizeof (u32), + .format_trace = format_nsh_input_map_trace, + .format_buffer = format_nsh_header_with_length, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(nsh_input_error_strings), + .error_strings = nsh_input_error_strings, + + .n_next_nodes = NSH_INPUT_N_NEXT, + + .next_nodes = { +#define _(s,n) [NSH_INPUT_NEXT_##s] = n, + foreach_nsh_input_next +#undef _ + }, +}; |