diff options
Diffstat (limited to 'src/plugins/srv6-mobile/gtp4_d.c')
| -rw-r--r-- | src/plugins/srv6-mobile/gtp4_d.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/src/plugins/srv6-mobile/gtp4_d.c b/src/plugins/srv6-mobile/gtp4_d.c new file mode 100644 index 00000000000..2160a90260f --- /dev/null +++ b/src/plugins/srv6-mobile/gtp4_d.c @@ -0,0 +1,240 @@ +/* + * srv6_t_m_gtp4_d.c + * + * Copyright (c) 2019 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/adj/adj.h> +#include <vnet/plugin/plugin.h> +#include <vpp/app/version.h> +#include <srv6-mobile/mobile.h> + +srv6_t_main_v4_decap_t srv6_t_main_v4_decap; + +static void +clb_dpo_lock_srv6_t_m_gtp4_d (dpo_id_t * dpo) +{ +} + +static void +clb_dpo_unlock_srv6_t_m_gtp4_d (dpo_id_t * dpo) +{ +} + +static u8 * +clb_dpo_format_srv6_t_m_gtp4_d (u8 * s, va_list * args) +{ + index_t index = va_arg (*args, index_t); + CLIB_UNUSED (u32 indent) = va_arg (*args, u32); + + return (format (s, "SR: dynamic_proxy_index:[%u]", index)); +} + +const static dpo_vft_t dpo_vft = { + .dv_lock = clb_dpo_lock_srv6_t_m_gtp4_d, + .dv_unlock = clb_dpo_unlock_srv6_t_m_gtp4_d, + .dv_format = clb_dpo_format_srv6_t_m_gtp4_d, +}; + +const static char *const srv6_t_m_gtp4_d_nodes[] = { + "srv6-t-m-gtp4-d", + NULL, +}; + +const static char *const srv6_t_m_gtp4_d_v6_nodes[] = { + "error-drop", + NULL, +}; + +const static char *const *const dpo_nodes[DPO_PROTO_NUM] = { + [DPO_PROTO_IP6] = srv6_t_m_gtp4_d_v6_nodes, + [DPO_PROTO_IP4] = srv6_t_m_gtp4_d_nodes, +}; + +static u8 fn_name[] = "SRv6-T.M.GTP4.D-plugin"; +static u8 keyword_str[] = "t.m.gtp4.d"; +static u8 def_str[] = + "Transit function with decapsulation for IPv4/GTP tunnel"; +static u8 param_str[] = + "<sr-prefix>/<sr-prefixlen> v6src_prefix <v6src_prefix>/<prefixlen> [nhtype <nhtype>]"; + +static u8 * +clb_format_srv6_t_m_gtp4_d (u8 * s, va_list * args) +{ + srv6_end_gtp4_param_t *ls_mem = va_arg (*args, void *); + + s = format (s, "SRv6 T.M.GTP4.D\n\t"); + + s = + format (s, "SR Prefix: %U/%d, ", format_ip6_address, &ls_mem->sr_prefix, + ls_mem->sr_prefixlen); + + s = + format (s, "v6src Prefix: %U/%d", format_ip6_address, + &ls_mem->v6src_prefix, ls_mem->v6src_prefixlen); + + if (ls_mem->nhtype != SRV6_NHTYPE_NONE) + { + if (ls_mem->nhtype == SRV6_NHTYPE_IPV4) + s = format (s, ", NHType IPv4\n"); + else if (ls_mem->nhtype == SRV6_NHTYPE_IPV6) + s = format (s, ", NHType IPv6\n"); + else if (ls_mem->nhtype == SRV6_NHTYPE_NON_IP) + s = format (s, ", NHType Non-IP\n"); + else + s = format (s, ", NHType Unknow(%d)\n", ls_mem->nhtype); + } + else + s = format (s, "\n"); + + return s; +} + +static uword +clb_unformat_srv6_t_m_gtp4_d (unformat_input_t * input, va_list * args) +{ + void **plugin_mem_p = va_arg (*args, void **); + srv6_end_gtp4_param_t *ls_mem; + ip6_address_t sr_prefix; + u32 sr_prefixlen; + ip6_address_t v6src_prefix; + u32 v6src_prefixlen; + u8 nhtype; + + if (unformat (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv4", + unformat_ip6_address, &sr_prefix, &sr_prefixlen, + unformat_ip6_address, &v6src_prefix, &v6src_prefixlen)) + { + nhtype = SRV6_NHTYPE_IPV4; + } + else + if (unformat + (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv6", + unformat_ip6_address, &sr_prefix, &sr_prefixlen, + unformat_ip6_address, &v6src_prefix, &v6src_prefixlen)) + { + nhtype = SRV6_NHTYPE_IPV6; + } + else + if (unformat + (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype non-ip", + unformat_ip6_address, &sr_prefix, &sr_prefixlen, + unformat_ip6_address, &v6src_prefix, &v6src_prefixlen)) + { + nhtype = SRV6_NHTYPE_NON_IP; + } + else if (unformat (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d", + unformat_ip6_address, &sr_prefix, &sr_prefixlen, + unformat_ip6_address, &v6src_prefix, &v6src_prefixlen)) + { + nhtype = SRV6_NHTYPE_NONE; + } + else + { + return 0; + } + + ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1); + clib_memset (ls_mem, 0, sizeof *ls_mem); + *plugin_mem_p = ls_mem; + + ls_mem->sr_prefix = sr_prefix; + ls_mem->sr_prefixlen = sr_prefixlen; + + ls_mem->v6src_prefix = v6src_prefix; + ls_mem->v6src_prefixlen = v6src_prefixlen; + + ls_mem->nhtype = nhtype; + + return 1; +} + +static int +clb_creation_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy) +{ + return 0; +} + +static int +clb_removal_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy) +{ + srv6_end_gtp4_param_t *ls_mem; + + ls_mem = (srv6_end_gtp4_param_t *) sr_policy->plugin_mem; + + clib_mem_free (ls_mem); + + return 0; +} + +static clib_error_t * +srv6_t_m_gtp4_d_init (vlib_main_t * vm) +{ + srv6_t_main_v4_decap_t *sm = &srv6_t_main_v4_decap; + ip6_header_t *ip6; + dpo_type_t dpo_type; + vlib_node_t *node; + u32 rc; + + sm->vlib_main = vm; + sm->vnet_main = vnet_get_main (); + + node = vlib_get_node_by_name (vm, (u8 *) "srv6-t-m-gtp4-d"); + sm->t_m_gtp4_d_node_index = node->index; + + node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); + sm->error_node_index = node->index; + + ip6 = &sm->cache_hdr; + + clib_memset_u8 (ip6, 0, sizeof (ip6_header_t)); + + // IPv6 header (default) + ip6->ip_version_traffic_class_and_flow_label = 0x60; + ip6->hop_limit = 64; + ip6->protocol = IP_PROTOCOL_IPV6; + + dpo_type = dpo_register_new_type (&dpo_vft, dpo_nodes); + + rc = sr_policy_register_function (vm, fn_name, keyword_str, def_str, param_str, 128, //prefix len + &dpo_type, + clb_format_srv6_t_m_gtp4_d, + clb_unformat_srv6_t_m_gtp4_d, + clb_creation_srv6_t_m_gtp4_d, + clb_removal_srv6_t_m_gtp4_d); + if (rc < 0) + clib_error_return (0, "SRv6 Transit GTP4.D Policy function" + "couldn't be registered"); + return 0; +} + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT (srv6_t_m_gtp4_d, static) = +{ + .arc_name = "ip4-unicast", + .node_name = "srv6-t-m-gtp4-d", + .runs_before = 0, +}; + +VLIB_INIT_FUNCTION (srv6_t_m_gtp4_d_init); +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |