diff options
Diffstat (limited to 'src/vnet/ppp')
| -rw-r--r-- | src/vnet/ppp/error.def | 42 | ||||
| -rw-r--r-- | src/vnet/ppp/node.c | 377 | ||||
| -rw-r--r-- | src/vnet/ppp/packet.h | 199 | ||||
| -rw-r--r-- | src/vnet/ppp/pg.c | 114 | ||||
| -rw-r--r-- | src/vnet/ppp/ppp.c | 261 | ||||
| -rw-r--r-- | src/vnet/ppp/ppp.h | 132 |
6 files changed, 1125 insertions, 0 deletions
diff --git a/src/vnet/ppp/error.def b/src/vnet/ppp/error.def new file mode 100644 index 00000000..ba645408 --- /dev/null +++ b/src/vnet/ppp/error.def @@ -0,0 +1,42 @@ +/* + * 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. + */ +/* + * ppp_error.def: ppp errors + * + * 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. + */ + +ppp_error (NONE, "no error") +ppp_error (UNKNOWN_PROTOCOL, "unknown ppp protocol") +ppp_error (UNKNOWN_ADDRESS_CONTROL, "address, control != 0xff03") diff --git a/src/vnet/ppp/node.c b/src/vnet/ppp/node.c new file mode 100644 index 00000000..2f6e0c33 --- /dev/null +++ b/src/vnet/ppp/node.c @@ -0,0 +1,377 @@ +/* + * 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. + */ +/* + * ppp_node.c: ppp packet processing + * + * Copyright (c) 2010 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/pg/pg.h> +#include <vnet/ppp/ppp.h> +#include <vppinfra/sparse_vec.h> + +#define foreach_ppp_input_next \ + _ (PUNT, "error-punt") \ + _ (DROP, "error-drop") + +typedef enum +{ +#define _(s,n) PPP_INPUT_NEXT_##s, + foreach_ppp_input_next +#undef _ + PPP_INPUT_N_NEXT, +} ppp_input_next_t; + +typedef struct +{ + u8 packet_data[32]; +} ppp_input_trace_t; + +static u8 * +format_ppp_input_trace (u8 * s, va_list * va) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); + ppp_input_trace_t *t = va_arg (*va, ppp_input_trace_t *); + + s = format (s, "%U", format_ppp_header, t->packet_data); + + return s; +} + +typedef struct +{ + /* Sparse vector mapping ppp protocol in network byte order + to next index. */ + u16 *next_by_protocol; + + u32 *sparse_index_by_next_index; +} ppp_input_runtime_t; + +static uword +ppp_input (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * from_frame) +{ + ppp_input_runtime_t *rt = (void *) node->runtime_data; + u32 n_left_from, next_index, i_next, *from, *to_next; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + vlib_trace_frame_buffers_only (vm, node, + from, + n_left_from, + sizeof (from[0]), + sizeof (ppp_input_trace_t)); + + next_index = node->cached_next_index; + i_next = vec_elt (rt->sparse_index_by_next_index, 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; + ppp_header_t *h0, *h1; + u32 i0, i1, protocol0, protocol1, enqueue_code; + + /* 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, sizeof (h0[0]), LOAD); + CLIB_PREFETCH (p3->data, sizeof (h1[0]), LOAD); + } + + bi0 = from[0]; + bi1 = from[1]; + to_next[0] = bi0; + to_next[1] = bi1; + from += 2; + to_next += 2; + n_left_to_next -= 2; + n_left_from -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + h0 = (void *) (b0->data + b0->current_data); + h1 = (void *) (b1->data + b1->current_data); + + b0->current_data += sizeof (h0[0]); + b1->current_data += sizeof (h1[0]); + + b0->current_length -= sizeof (h0[0]); + b1->current_length -= sizeof (h1[0]); + + /* Index sparse array with network byte order. */ + protocol0 = h0->protocol; + protocol1 = h1->protocol; + sparse_vec_index2 (rt->next_by_protocol, protocol0, protocol1, &i0, + &i1); + + b0->error = + node->errors[i0 == + SPARSE_VEC_INVALID_INDEX ? PPP_ERROR_UNKNOWN_PROTOCOL + : PPP_ERROR_NONE]; + b1->error = + node->errors[i1 == + SPARSE_VEC_INVALID_INDEX ? PPP_ERROR_UNKNOWN_PROTOCOL + : PPP_ERROR_NONE]; + + enqueue_code = (i0 != i_next) + 2 * (i1 != i_next); + + if (PREDICT_FALSE (enqueue_code != 0)) + { + switch (enqueue_code) + { + case 1: + /* A B A */ + to_next[-2] = bi1; + to_next -= 1; + n_left_to_next += 1; + vlib_set_next_frame_buffer (vm, node, + vec_elt (rt->next_by_protocol, + i0), bi0); + break; + + case 2: + /* A A B */ + to_next -= 1; + n_left_to_next += 1; + vlib_set_next_frame_buffer (vm, node, + vec_elt (rt->next_by_protocol, + i1), bi1); + break; + + case 3: + /* A B B or A B C */ + to_next -= 2; + n_left_to_next += 2; + vlib_set_next_frame_buffer (vm, node, + vec_elt (rt->next_by_protocol, + i0), bi0); + vlib_set_next_frame_buffer (vm, node, + vec_elt (rt->next_by_protocol, + i1), bi1); + if (i0 == i1) + { + vlib_put_next_frame (vm, node, next_index, + n_left_to_next); + i_next = i1; + next_index = vec_elt (rt->next_by_protocol, i_next); + vlib_get_next_frame (vm, node, next_index, to_next, + n_left_to_next); + } + } + } + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ppp_header_t *h0; + u32 i0, protocol0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + h0 = (void *) (b0->data + b0->current_data); + + b0->current_data += sizeof (h0[0]); + b0->current_length -= sizeof (h0[0]); + + protocol0 = h0->protocol; + i0 = sparse_vec_index (rt->next_by_protocol, protocol0); + + b0->error = + node->errors[i0 == + SPARSE_VEC_INVALID_INDEX ? PPP_ERROR_UNKNOWN_PROTOCOL + : PPP_ERROR_NONE]; + + /* Sent packet to wrong next? */ + if (PREDICT_FALSE (i0 != i_next)) + { + /* Return old frame; remove incorrectly enqueued packet. */ + vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1); + + /* Send to correct next. */ + i_next = i0; + next_index = vec_elt (rt->next_by_protocol, i_next); + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); + to_next[0] = bi0; + to_next += 1; + n_left_to_next -= 1; + } + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return from_frame->n_vectors; +} + +static char *ppp_error_strings[] = { +#define ppp_error(n,s) s, +#include "error.def" +#undef ppp_error +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ppp_input_node) = { + .function = ppp_input, + .name = "ppp-input", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + + .runtime_data_bytes = sizeof (ppp_input_runtime_t), + + .n_errors = PPP_N_ERROR, + .error_strings = ppp_error_strings, + + .n_next_nodes = PPP_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [PPP_INPUT_NEXT_##s] = n, + foreach_ppp_input_next +#undef _ + }, + + .format_buffer = format_ppp_header_with_length, + .format_trace = format_ppp_input_trace, + .unformat_buffer = unformat_ppp_header, +}; +/* *INDENT-ON* */ + +static clib_error_t * +ppp_input_runtime_init (vlib_main_t * vm) +{ + ppp_input_runtime_t *rt; + + rt = vlib_node_get_runtime_data (vm, ppp_input_node.index); + + rt->next_by_protocol = sparse_vec_new + ( /* elt bytes */ sizeof (rt->next_by_protocol[0]), + /* bits in index */ BITS (((ppp_header_t *) 0)->protocol)); + + vec_validate (rt->sparse_index_by_next_index, PPP_INPUT_NEXT_DROP); + vec_validate (rt->sparse_index_by_next_index, PPP_INPUT_NEXT_PUNT); + rt->sparse_index_by_next_index[PPP_INPUT_NEXT_DROP] + = SPARSE_VEC_INVALID_INDEX; + rt->sparse_index_by_next_index[PPP_INPUT_NEXT_PUNT] + = SPARSE_VEC_INVALID_INDEX; + + return 0; +} + +static clib_error_t * +ppp_input_init (vlib_main_t * vm) +{ + + { + clib_error_t *error = vlib_call_init_function (vm, ppp_init); + if (error) + clib_error_report (error); + } + + ppp_setup_node (vm, ppp_input_node.index); + ppp_input_runtime_init (vm); + + return 0; +} + +VLIB_INIT_FUNCTION (ppp_input_init); +VLIB_WORKER_INIT_FUNCTION (ppp_input_runtime_init); + +void +ppp_register_input_protocol (vlib_main_t * vm, + ppp_protocol_t protocol, u32 node_index) +{ + ppp_main_t *em = &ppp_main; + ppp_protocol_info_t *pi; + ppp_input_runtime_t *rt; + u16 *n; + u32 i; + + { + clib_error_t *error = vlib_call_init_function (vm, ppp_input_init); + if (error) + clib_error_report (error); + } + + pi = ppp_get_protocol_info (em, protocol); + pi->node_index = node_index; + pi->next_index = vlib_node_add_next (vm, ppp_input_node.index, node_index); + + /* Setup ppp protocol -> next index sparse vector mapping. */ + rt = vlib_node_get_runtime_data (vm, ppp_input_node.index); + n = + sparse_vec_validate (rt->next_by_protocol, + clib_host_to_net_u16 (protocol)); + n[0] = pi->next_index; + + /* Rebuild next index -> sparse index inverse mapping when sparse vector + is updated. */ + vec_validate (rt->sparse_index_by_next_index, pi->next_index); + for (i = 1; i < vec_len (rt->next_by_protocol); i++) + rt->sparse_index_by_next_index[rt->next_by_protocol[i]] = i; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ppp/packet.h b/src/vnet/ppp/packet.h new file mode 100644 index 00000000..cab9743d --- /dev/null +++ b/src/vnet/ppp/packet.h @@ -0,0 +1,199 @@ +/* + * 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. + */ +#ifndef included_vnet_ppp_packet_h +#define included_vnet_ppp_packet_h + +/* + * PPP packet format + * + * Copyright (c) 2009 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. + */ + +/* +See http://www.iana.org/assignments/ppp-numbers. + +The Point-to-Point Protocol (PPP) Data Link Layer [146,147,175] +contains a 16 bit Protocol field to identify the the encapsulated +protocol. The Protocol field is consistent with the ISO 3309 (HDLC) +extension mechanism for Address fields. All Protocols MUST be +assigned such that the least significant bit of the most significant +octet equals "0", and the least significant bit of the least +significant octet equals "1". +*/ + +#define foreach_ppp_protocol \ +_ (0x0001, padding) \ +_ (0x0003, rohc_small_cid) \ +_ (0x0005, rohc_large_cid) \ +_ (0x0021, ip4) \ +_ (0x0023, osi) \ +_ (0x0025, xerox_ns_idp) \ +_ (0x0027, decnet) \ +_ (0x0029, appletalk) \ +_ (0x002b, ipx) \ +_ (0x002d, vj_compressed_tcp) \ +_ (0x002f, vj_uncompressed_tcp) \ +_ (0x0031, bpdu) \ +_ (0x0033, streams) \ +_ (0x0035, vines) \ +_ (0x0039, appletalk_eddp) \ +_ (0x003b, appletalk_smart_buffered) \ +_ (0x003d, multilink) \ +_ (0x003f, netbios_framing) \ +_ (0x0041, cisco) \ +_ (0x0043, timeplex) \ +_ (0x0045, fujitsu_lblb) \ +_ (0x0047, dca_remote_lan) \ +_ (0x0049, sdtp) \ +_ (0x004b, sna_over_802_2) \ +_ (0x004d, sna) \ +_ (0x004f, ip6_header_compression) \ +_ (0x0051, knx) \ +_ (0x0053, encryption) \ +_ (0x0055, link_encryption) \ +_ (0x0057, ip6) \ +_ (0x0059, ppp_mux) \ +_ (0x005b, vendor_specific_a) \ +_ (0x0061, rtp_iphc_full_header) \ +_ (0x0063, rtp_iphc_compressed_tcp) \ +_ (0x0065, rtp_iphc_compressed_non_tcp) \ +_ (0x0067, rtp_iphc_compressed_udp_8) \ +_ (0x0069, rtp_iphc_compressed_rtp_8) \ +_ (0x006f, stampede) \ +_ (0x0073, mp_plus) \ +_ (0x007d, control) \ +_ (0x00c1, ntcits_ipi) \ +_ (0x00cf, ppp_nlpid) \ +_ (0x00fb, multilink_compression) \ +_ (0x00fd, compressed_datagram) \ +_ (0x0201, 802_1d_hello) \ +_ (0x0203, ibm_source_routing) \ +_ (0x0205, dec_lanbridge) \ +_ (0x0207, cdp) \ +_ (0x0209, netcs) \ +_ (0x020b, stp) \ +_ (0x020d, edp) \ +_ (0x0211, oscp_a) \ +_ (0x0213, oscp_b) \ +_ (0x0231, luxcom) \ +_ (0x0233, sigma) \ +_ (0x0235, apple_client_server) \ +_ (0x0281, mpls_unicast) \ +_ (0x0283, mpls_multicast) \ +_ (0x0285, ieee_p1284_4) \ +_ (0x0287, tetra) \ +_ (0x0289, multichannel_flow_treatment) \ +_ (0x2063, rtp_iphc_compressed_tcp_no_delta) \ +_ (0x2065, rtp_iphc_context_state) \ +_ (0x2067, rtp_iphc_compressed_udp_16) \ +_ (0x2069, rtp_iphc_compressed_rtp_16) \ +_ (0x4001, cray) \ +_ (0x4003, cdpd) \ +_ (0x4005, expand) \ +_ (0x4007, odsicp) \ +_ (0x4009, docsis_dll) \ +_ (0x400B, cetacean) \ +_ (0x4021, lzs) \ +_ (0x4023, reftek) \ +_ (0x4025, fibre_channel) \ +_ (0x4027, emit) \ +_ (0x405b, vendor_specific_b) \ +_ (0xc021, lcp) \ +_ (0xc023, pap) \ +_ (0xc025, link_quality_report) \ +_ (0xc027, shiva_password) \ +_ (0xc029, cbcp) \ +_ (0xc02b, bacp) \ +_ (0xc02d, bap) \ +_ (0xc05b, vendor_specific_password) \ +_ (0xc081, container_control) \ +_ (0xc223, chap) \ +_ (0xc225, rsa) \ +_ (0xc227, extensible_authentication) \ +_ (0xc229, mitsubishi_security_info) \ +_ (0xc26f, stampede_authorization) \ +_ (0xc281, proprietary_authentication_a) \ +_ (0xc283, proprietary_authentication_b) \ +_ (0xc481, proprietary_node_id_authentication) + +typedef enum +{ +#define _(n,f) PPP_PROTOCOL_##f = n, + foreach_ppp_protocol +#undef _ +} ppp_protocol_t; + +/* PPP Link Control Protocol (LCP) and Internet Protocol Control Protocol (IPCP) Codes + +The Point-to-Point Protocol (PPP) Link Control Protocol (LCP), +the Compression Control Protocol (CCP), Internet Protocol Control +Protocol (IPCP), and other control protocols, contain an 8 bit +Code field which identifies the type of packet. */ + +#define foreach_ppp_lcp_code \ +_ (0, vendor_specific) \ +_ (1, configure_request) \ +_ (2, configure_ack) \ +_ (3, configure_nak) \ +_ (4, configure_reject) \ +_ (5, terminate_request) \ +_ (6, terminate_ack) \ +_ (7, code_reject) \ +_ (8, protocol_reject) \ +_ (9, echo_request) \ +_ (10, echo_reply) \ +_ (11, discard_request) \ +_ (12, identification) \ +_ (13, time_remaining) \ +_ (14, reset_request) \ +_ (15, reset_reply) + +typedef struct +{ + /* Set to 0xff 0x03 */ + u8 address, control; + + /* Layer 3 protocol for this packet. */ + u16 protocol; +} ppp_header_t; + +#endif /* included_vnet_ppp_packet_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ppp/pg.c b/src/vnet/ppp/pg.c new file mode 100644 index 00000000..0b46ccb9 --- /dev/null +++ b/src/vnet/ppp/pg.c @@ -0,0 +1,114 @@ +/* + * 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. + */ +/* + * ppp_pg.c: packet generator ppp interface + * + * 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/pg/pg.h> +#include <vnet/ppp/ppp.h> + +typedef struct +{ + pg_edit_t address; + pg_edit_t control; + pg_edit_t protocol; +} pg_ppp_header_t; + +static inline void +pg_ppp_header_init (pg_ppp_header_t * e) +{ + pg_edit_init (&e->address, ppp_header_t, address); + pg_edit_init (&e->control, ppp_header_t, control); + pg_edit_init (&e->protocol, ppp_header_t, protocol); +} + +uword +unformat_pg_ppp_header (unformat_input_t * input, va_list * args) +{ + pg_stream_t *s = va_arg (*args, pg_stream_t *); + pg_ppp_header_t *h; + u32 group_index, error; + + h = pg_create_edit_group (s, sizeof (h[0]), sizeof (ppp_header_t), + &group_index); + pg_ppp_header_init (h); + + pg_edit_set_fixed (&h->address, 0xff); + pg_edit_set_fixed (&h->control, 0x03); + + error = 1; + if (!unformat (input, "%U", + unformat_pg_edit, + unformat_ppp_protocol_net_byte_order, &h->protocol)) + goto done; + + { + ppp_main_t *pm = &ppp_main; + ppp_protocol_info_t *pi = 0; + pg_node_t *pg_node = 0; + + if (h->protocol.type == PG_EDIT_FIXED) + { + u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO]; + pi = ppp_get_protocol_info (pm, clib_net_to_host_u16 (t)); + if (pi && pi->node_index != ~0) + pg_node = pg_get_node (pi->node_index); + } + + if (pg_node && pg_node->unformat_edit + && unformat_user (input, pg_node->unformat_edit, s)) + ; + + else if (!unformat_user (input, unformat_pg_payload, s)) + goto done; + } + + error = 0; +done: + if (error) + pg_free_edit_group (s); + return error == 0; +} + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ppp/ppp.c b/src/vnet/ppp/ppp.c new file mode 100644 index 00000000..a0eefbad --- /dev/null +++ b/src/vnet/ppp/ppp.c @@ -0,0 +1,261 @@ +/* + * 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. + */ +/* + * ppp.c: ppp support + * + * Copyright (c) 2010 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 <vnet/vnet.h> +#include <vnet/ppp/ppp.h> + +/* Global main structure. */ +ppp_main_t ppp_main; + +u8 * +format_ppp_protocol (u8 * s, va_list * args) +{ + ppp_protocol_t p = va_arg (*args, u32); + ppp_main_t *pm = &ppp_main; + ppp_protocol_info_t *pi = ppp_get_protocol_info (pm, p); + + if (pi) + s = format (s, "%s", pi->name); + else + s = format (s, "0x%04x", p); + + return s; +} + +u8 * +format_ppp_header_with_length (u8 * s, va_list * args) +{ + ppp_main_t *pm = &ppp_main; + ppp_header_t *h = va_arg (*args, ppp_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + ppp_protocol_t p = clib_net_to_host_u16 (h->protocol); + uword indent, header_bytes; + + header_bytes = sizeof (h[0]); + if (max_header_bytes != 0 && header_bytes > max_header_bytes) + return format (s, "ppp header truncated"); + + indent = format_get_indent (s); + + s = format (s, "PPP %U", format_ppp_protocol, p); + + if (h->address != 0xff) + s = format (s, ", address 0x%02x", h->address); + if (h->control != 0x03) + s = format (s, ", control 0x%02x", h->control); + + if (max_header_bytes != 0 && header_bytes > max_header_bytes) + { + ppp_protocol_info_t *pi = ppp_get_protocol_info (pm, p); + vlib_node_t *node = vlib_get_node (pm->vlib_main, pi->node_index); + if (node->format_buffer) + s = format (s, "\n%U%U", + format_white_space, indent, + node->format_buffer, (void *) (h + 1), + max_header_bytes - header_bytes); + } + + return s; +} + +u8 * +format_ppp_header (u8 * s, va_list * args) +{ + ppp_header_t *h = va_arg (*args, ppp_header_t *); + return format (s, "%U", format_ppp_header_with_length, h, 0); +} + +/* Returns ppp protocol as an int in host byte order. */ +uword +unformat_ppp_protocol_host_byte_order (unformat_input_t * input, + va_list * args) +{ + u16 *result = va_arg (*args, u16 *); + ppp_main_t *pm = &ppp_main; + int p, i; + + /* Numeric type. */ + if (unformat (input, "0x%x", &p) || unformat (input, "%d", &p)) + { + if (p >= (1 << 16)) + return 0; + *result = p; + return 1; + } + + /* Named type. */ + if (unformat_user (input, unformat_vlib_number_by_name, + pm->protocol_info_by_name, &i)) + { + ppp_protocol_info_t *pi = vec_elt_at_index (pm->protocol_infos, i); + *result = pi->protocol; + return 1; + } + + return 0; +} + +uword +unformat_ppp_protocol_net_byte_order (unformat_input_t * input, + va_list * args) +{ + u16 *result = va_arg (*args, u16 *); + if (!unformat_user (input, unformat_ppp_protocol_host_byte_order, result)) + return 0; + *result = clib_host_to_net_u16 ((u16) * result); + return 1; +} + +uword +unformat_ppp_header (unformat_input_t * input, va_list * args) +{ + u8 **result = va_arg (*args, u8 **); + ppp_header_t _h, *h = &_h; + u16 p; + + if (!unformat (input, "%U", unformat_ppp_protocol_host_byte_order, &p)) + return 0; + + h->address = 0xff; + h->control = 0x03; + h->protocol = clib_host_to_net_u16 (p); + + /* Add header to result. */ + { + void *p; + u32 n_bytes = sizeof (h[0]); + + vec_add2 (*result, p, n_bytes); + clib_memcpy (p, h, n_bytes); + } + + return 1; +} + +static u8 * +ppp_build_rewrite (vnet_main_t * vnm, + u32 sw_if_index, + vnet_link_t link_type, const void *dst_hw_address) +{ + ppp_header_t *h; + u8 *rewrite = NULL; + ppp_protocol_t protocol; + + switch (link_type) + { +#define _(a,b) case VNET_LINK_##a: protocol = PPP_PROTOCOL_##b; break + _(IP4, ip4); + _(IP6, ip6); + _(MPLS, mpls_unicast); +#undef _ + default: + return (NULL); + } + + vec_validate (rewrite, sizeof (*h) - 1); + h = (ppp_header_t *) rewrite; + h->address = 0xff; + h->control = 0x03; + h->protocol = clib_host_to_net_u16 (protocol); + + return (rewrite); +} + +/* *INDENT-OFF* */ +VNET_HW_INTERFACE_CLASS (ppp_hw_interface_class) = { + .name = "PPP", + .format_header = format_ppp_header_with_length, + .unformat_header = unformat_ppp_header, + .build_rewrite = ppp_build_rewrite, + .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, +}; +/* *INDENT-ON* */ + +static void +add_protocol (ppp_main_t * pm, ppp_protocol_t protocol, char *protocol_name) +{ + ppp_protocol_info_t *pi; + u32 i; + + vec_add2 (pm->protocol_infos, pi, 1); + i = pi - pm->protocol_infos; + + pi->name = protocol_name; + pi->protocol = protocol; + pi->next_index = pi->node_index = ~0; + + hash_set (pm->protocol_info_by_protocol, protocol, i); + hash_set_mem (pm->protocol_info_by_name, pi->name, i); +} + +static clib_error_t * +ppp_init (vlib_main_t * vm) +{ + ppp_main_t *pm = &ppp_main; + + memset (pm, 0, sizeof (pm[0])); + pm->vlib_main = vm; + + pm->protocol_info_by_name = hash_create_string (0, sizeof (uword)); + pm->protocol_info_by_protocol = hash_create (0, sizeof (uword)); + +#define _(n,s) add_protocol (pm, PPP_PROTOCOL_##s, #s); + foreach_ppp_protocol; +#undef _ + + return vlib_call_init_function (vm, ppp_input_init); +} + +VLIB_INIT_FUNCTION (ppp_init); + +ppp_main_t * +ppp_get_main (vlib_main_t * vm) +{ + vlib_call_init_function (vm, ppp_init); + return &ppp_main; +} + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/ppp/ppp.h b/src/vnet/ppp/ppp.h new file mode 100644 index 00000000..726eca66 --- /dev/null +++ b/src/vnet/ppp/ppp.h @@ -0,0 +1,132 @@ +/* + * 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. + */ +/* + * ppp.h: types/functions for ppp. + * + * 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. + */ + +#ifndef included_ppp_h +#define included_ppp_h + +#include <vnet/vnet.h> +#include <vnet/ppp/packet.h> +#include <vnet/pg/pg.h> + +extern vnet_hw_interface_class_t ppp_hw_interface_class; + +typedef enum +{ +#define ppp_error(n,s) PPP_ERROR_##n, +#include <vnet/ppp/error.def> +#undef ppp_error + PPP_N_ERROR, +} ppp_error_t; + +typedef struct +{ + /* Name (a c string). */ + char *name; + + /* PPP protocol type in host byte order. */ + ppp_protocol_t protocol; + + /* Node which handles this type. */ + u32 node_index; + + /* Next index for this type. */ + u32 next_index; +} ppp_protocol_info_t; + +typedef struct +{ + vlib_main_t *vlib_main; + + ppp_protocol_info_t *protocol_infos; + + /* Hash tables mapping name/protocol to protocol info index. */ + uword *protocol_info_by_name, *protocol_info_by_protocol; +} ppp_main_t; + +always_inline ppp_protocol_info_t * +ppp_get_protocol_info (ppp_main_t * em, ppp_protocol_t protocol) +{ + uword *p = hash_get (em->protocol_info_by_protocol, protocol); + return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0; +} + +extern ppp_main_t ppp_main; + +/* Register given node index to take input for given ppp type. */ +void +ppp_register_input_type (vlib_main_t * vm, + ppp_protocol_t protocol, u32 node_index); + +format_function_t format_ppp_protocol; +format_function_t format_ppp_header; +format_function_t format_ppp_header_with_length; + +/* Parse ppp protocol as 0xXXXX or protocol name. + In either host or network byte order. */ +unformat_function_t unformat_ppp_protocol_host_byte_order; +unformat_function_t unformat_ppp_protocol_net_byte_order; + +/* Parse ppp header. */ +unformat_function_t unformat_ppp_header; +unformat_function_t unformat_pg_ppp_header; + +always_inline void +ppp_setup_node (vlib_main_t * vm, u32 node_index) +{ + vlib_node_t *n = vlib_get_node (vm, node_index); + pg_node_t *pn = pg_get_node (node_index); + + n->format_buffer = format_ppp_header_with_length; + n->unformat_buffer = unformat_ppp_header; + pn->unformat_edit = unformat_pg_ppp_header; +} + +void +ppp_register_input_protocol (vlib_main_t * vm, + ppp_protocol_t protocol, u32 node_index); + +#endif /* included_ppp_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |