/* * Copyright (c) 2015 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. */ /* * ethernet_format.c: ethernet formatting/parsing. * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <vlib/vlib.h> #include <vnet/ethernet/ethernet.h> u8 * format_ethernet_address (u8 * s, va_list * args) { ethernet_main_t *em = ðernet_main; u8 *a = va_arg (*args, u8 *); if (em->format_ethernet_address_16bit) return format (s, "%02x%02x.%02x%02x.%02x%02x", a[0], a[1], a[2], a[3], a[4], a[5]); else return format (s, "%02x:%02x:%02x:%02x:%02x:%02x", a[0], a[1], a[2], a[3], a[4], a[5]); } u8 * format_ethernet_type (u8 * s, va_list * args) { ethernet_type_t type = va_arg (*args, u32); ethernet_main_t *em = ðernet_main; ethernet_type_info_t *t = ethernet_get_type_info (em, type); if (t) s = format (s, "%s", t->name); else s = format (s, "0x%04x", type); return s; } u8 * format_ethernet_vlan_tci (u8 * s, va_list * va) { u32 vlan_tci = va_arg (*va, u32); u32 vid = (vlan_tci & 0xfff); u32 cfi = (vlan_tci >> 12) & 1; u32 pri = (vlan_tci >> 13); s = format (s, "%d", vid); if (pri != 0) s = format (s, " priority %d", pri); if (cfi != 0) s = format (s, " cfi"); return s; } u8 * format_ethernet_header_with_length (u8 * s, va_list * args) { ethernet_pbb_header_packed_t *ph = va_arg (*args, ethernet_pbb_header_packed_t *); ethernet_max_header_t *m = (ethernet_max_header_t *) ph; u32 max_header_bytes = va_arg (*args, u32); ethernet_main_t *em = ðernet_main; ethernet_header_t *e = &m->ethernet; ethernet_vlan_header_t *v; ethernet_type_t type = clib_net_to_host_u16 (e->type); ethernet_type_t vlan_type[ARRAY_LEN (m->vlan)]; u32 n_vlan = 0, i, header_bytes; uword indent; while ((type == ETHERNET_TYPE_VLAN || type == ETHERNET_TYPE_DOT1AD || type == ETHERNET_TYPE_DOT1AH) && n_vlan < ARRAY_LEN (m->vlan)) { vlan_type[n_vlan] = type; if (type != ETHERNET_TYPE_DOT1AH) { v = m->vlan + n_vlan; type = clib_net_to_host_u16 (v->type); } n_vlan++; } header_bytes = sizeof (e[0]) + n_vlan * sizeof (v[0]); if (max_header_bytes != 0 && header_bytes > max_header_bytes) return format (s, "ethernet header truncated"); indent = format_get_indent (s); s = format (s, "%U: %U -> %U", format_ethernet_type, type, format_ethernet_address, e->src_address, format_ethernet_address, e->dst_address); if (type != ETHERNET_TYPE_DOT1AH) { for (i = 0; i < n_vlan; i++) { u32 v = clib_net_to_host_u16 (m->vlan[i].priority_cfi_and_id); if (*vlan_type == ETHERNET_TYPE_VLAN) s = format (s, " 802.1q vlan %U", format_ethernet_vlan_tci, v); else s = format (s, " 802.1ad vlan %U", format_ethernet_vlan_tci, v); } if (max_header_bytes != 0 && header_bytes < max_header_bytes) { ethernet_type_info_t *ti; vlib_node_t *node = 0; ti = ethernet_get_type_info (em, type); if (ti && ti->node_index != ~0) node = vlib_get_node (em->vlib_main, ti->node_index); if (node && node->format_buffer) s = format (s, "\n%U%U", format_white_space, indent, node->format_buffer, (void *) m + header_bytes, max_header_bytes - header_bytes); } } else { s = format (s, " %s b-tag %04X", (clib_net_to_host_u16 (ph->b_type) == ETHERNET_TYPE_DOT1AD) ? "802.1ad" : "", clib_net_to_host_u16 (ph->priority_dei_id)); s = format (s, " %s i-tag %08X", (clib_net_to_host_u16 (ph->i_type) == ETHERNET_TYPE_DOT1AH) ? "802.1ah" : "", clib_net_to_host_u32 (ph->priority_dei_uca_res_sid)); } return s; } u8 * format_ethernet_header (u8 * s, va_list * args) { ethernet_max_header_t *m = va_arg (*args, ethernet_max_header_t *); return format (s, "%U", format_ethernet_header_with_length, m, 0); } /* Parse X:X:X:X:X:X unix style ethernet address. */ static uword unformat_ethernet_address_unix (unformat_input_t * input, va_list * args) { u8 *result = va_arg (*args, u8 *); u32 i, a[6]; if (!unformat (input, "%_%x:%x:%x:%x:%x:%x%_", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5])) return 0; /* Check range. */ for (i = 0; i < ARRAY_LEN (a); i++) if (a[i] >= (1 << 8)) return 0; for (i = 0; i < ARRAY_LEN (a); i++) result[i] = a[i]; return 1; } /* Parse X.X.X cisco style ethernet address. */ static uword unformat_ethernet_address_cisco (unformat_input_t * input, va_list * args) { u8 *result = va_arg (*args, u8 *); u32 i, a[3]; if (!unformat (input, "%_%x.%x.%x%_", &a[0], &a[1], &a[2])) return 0; /* Check range. */ for (i = 0; i < ARRAY_LEN (a); i++) if (a[i] >= (1 << 16)) return 0; result[0] = (a[0] >> 8) & 0xff; result[1] = (a[0] >> 0) & 0xff; result[2] = (a[1] >> 8) & 0xff; result[3] = (a[1] >> 0) & 0xff; result[4] = (a[2] >> 8) & 0xff; result[5] = (a[2] >> 0) & 0xff; return 1; } /* Parse ethernet address; accept either unix or style addresses. */ uword unformat_ethernet_address (unformat_input_t * input, va_list * args) { u8 *result = va_arg (*args, u8 *); return (unformat_user (input, unformat_ethernet_address_unix, result) || unformat_user (input, unformat_ethernet_address_cisco, result)); } /* Returns ethernet type as an int in host byte order. */ uword unformat_ethernet_type_host_byte_order (unformat_input_t * input, va_list * args) { u16 *result = va_arg (*args, u16 *); ethernet_main_t *em = ðernet_main; int type, i; /* Numeric type. */ if (unformat (input, "0x%x", &type) || unformat (input, "%d", &type)) { if (type >= (1 << 16)) return 0; *result = type; return 1; } /* Named type. */ if (unformat_user (input, unformat_vlib_number_by_name, em->type_info_by_name, &i)) { ethernet_type_info_t *ti = vec_elt_at_index (em->type_infos, i); *result = ti->type; return 1; } return 0; } uword unformat_ethernet_type_net_byte_order (unformat_input_t * input, va_list * args) { u16 *result = va_arg (*args, u16 *); if (!unformat_user (input, unformat_ethernet_type_host_byte_order, result)) return 0; *result = clib_host_to_net_u16 ((u16) * result); return 1; } uword unformat_ethernet_header (unformat_input_t * input, va_list * args) { u8 **result = va_arg (*args, u8 **); ethernet_max_header_t _m, *m = &_m; ethernet_header_t *e = &m->ethernet; u16 type; u32 n_vlan; if (!unformat (input, "%U: %U -> %U", unformat_ethernet_type_host_byte_order, &type, unformat_ethernet_address, &e->src_address, unformat_ethernet_address, &e->dst_address)) return 0; n_vlan = 0; while (unformat (input, "vlan")) { u32 id, priority; if (!unformat_user (input, unformat_vlib_number, &id) || id >= ETHERNET_N_VLAN) return 0; if (unformat (input, "priority %d", &priority)) { if (priority >= 8) return 0; id |= priority << 13; } if (unformat (input, "cfi")) id |= 1 << 12; /* Too many vlans given. */ if (n_vlan >= ARRAY_LEN (m->vlan)) return 0; m->vlan[n_vlan].priority_cfi_and_id = clib_host_to_net_u16 (id); n_vlan++; } if (n_vlan == 0) e->type = clib_host_to_net_u16 (type); else { int i; e->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN); for (i = 0; i < n_vlan - 1; i++) m->vlan[i].type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN); m->vlan[n_vlan - 1].type = clib_host_to_net_u16 (type); } /* Add header to result. */ { void *p; u32 n_bytes = sizeof (e[0]) + n_vlan * sizeof (m->vlan[0]); vec_add2 (*result, p, n_bytes); clib_memcpy (p, m, n_bytes); } return 1; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */