diff options
Diffstat (limited to 'utils/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c')
| -rw-r--r-- | utils/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/utils/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c b/utils/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c new file mode 100644 index 000000000..f02605895 --- /dev/null +++ b/utils/sysrepo-plugins/hicn-plugin/plugin/ietf/ietf_interface.c @@ -0,0 +1,597 @@ +/* + * Copyright (c) 2016 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 <stdio.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> + +#include <sysrepo.h> +#include <sysrepo/plugins.h> +#include <sysrepo/values.h> +#include <sysrepo/xpath.h> +#include <vnet/interface.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vapi/interface.api.vapi.h> + +#include "ietf_interface.h" +#include "../hicn_vpp_comm.h" + + + +DEFINE_VAPI_MSG_IDS_INTERFACE_API_JSON; + +typedef struct hicn_interface_ +{ + u32 sw_if_index; + char interface_name[VPP_INTFC_NAME_LEN]; + u8 l2_address[VPP_MAC_ADDRESS_LEN]; + u32 l2_address_length; + u64 link_speed; + u16 link_mtu; + u8 admin_up_down; + u8 link_up_down; +} hicnIntfc; + +typedef struct _ietf_sw_interface_dump_ctx +{ + u8 last_called; + int num_ifs; + int capacity; + hicnIntfc * intfcArray; +} ietf_sw_interface_dump_ctx; + +static i32 ietf_setInterfaceFlags(u32 sw_if_index, u8 admin_up_down); +static i32 ietf_interface_name2index(const char *name, u32* if_index); +static i32 ietf_interface_add_del_addr(u32 sw_if_index, u8 is_add, u8 is_ipv6, + u8 del_all, u8 address_length, + u8 address[VPP_IP6_ADDRESS_LEN]); +static int ietf_initSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx); +static int ietf_freeSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx); + +/** + * @brief Helper function for converting netmask into prefix length. + */ +static uint8_t +netmask_to_prefix(const char *netmask) +{ + in_addr_t n = 0; + uint8_t i = 0; + + inet_pton(AF_INET, netmask, &n); + + while (n > 0) { + n = n >> 1; + i++; + } + + return i; +} + +/** + * @brief Helper function for converting IPv4/IPv6 address string into binary representation. + */ +static int +ip_addr_str_to_binary(const char *ip_address_str, uint8_t *ip_address_bin, bool is_ipv6) +{ + struct in6_addr addr6 = { 0, }; + struct in_addr addr4 = { 0, }; + int ret = 0; + + if (is_ipv6) { + ret = inet_pton(AF_INET6, ip_address_str, &(addr6)); + if (1 == ret) + { + memcpy(ip_address_bin, &addr6, sizeof(addr6)); + } + } else { + ret = inet_pton(AF_INET, ip_address_str, &(addr4)); + if (1 == ret) + { + memcpy(ip_address_bin, &addr4, sizeof(addr4)); + } + } + + return ret; +} + +/** + * @brief Enable or disable given interface. + */ +static int +interface_enable_disable(const char *if_name, bool enable) +{ + uint32_t if_index = ~0; + int rc = 0; + + SRP_LOG_DBG("%s interface '%s'", enable ? "Enabling" : "Disabling", if_name); + + /* get interface index */ + rc = ietf_interface_name2index(if_name, &if_index); + if (0 != rc) { + SRP_LOG_ERR("Invalid interface name: %s", if_name); + return SR_ERR_INVAL_ARG; + } + + /* enable/disable interface */ + rc = ietf_setInterfaceFlags(if_index, (uint8_t)enable); + if (0 != rc) { + SRP_LOG_ERR("Error by processing of the sw_interface_set_flags request, rc=%d", rc); + return SR_ERR_OPERATION_FAILED; + } else { + return SR_ERR_OK; + } +} + +/** + * @brief Callback to be called by any config change of "/ietf-interfaces:interfaces/interface/enabled" leaf. + */ +static int +ietf_interface_enable_disable_cb(sr_session_ctx_t *session, const char *xpath, sr_notif_event_t event, void *private_ctx) +{ + char *if_name = NULL; + sr_change_iter_t *iter = NULL; + sr_change_oper_t op = SR_OP_CREATED; + sr_val_t *old_val = NULL; + sr_val_t *new_val = NULL; + sr_xpath_ctx_t xpath_ctx = { 0, }; + int rc = SR_ERR_OK, op_rc = SR_ERR_OK; + + /* no-op for apply, we only care about SR_EV_ENABLED, SR_EV_VERIFY, SR_EV_ABORT */ + if (SR_EV_APPLY == event) { + return SR_ERR_OK; + } + SRP_LOG_DBG("'%s' modified, event=%d", xpath, event); + + /* get changes iterator */ + rc = sr_get_changes_iter(session, xpath, &iter); + if (SR_ERR_OK != rc) { + SRP_LOG_ERR("Unable to retrieve change iterator: %s", sr_strerror(rc)); + return rc; + } + + /* iterate over all changes */ + while ((SR_ERR_OK == op_rc || event == SR_EV_ABORT) && + (SR_ERR_OK == (rc = sr_get_change_next(session, iter, &op, &old_val, &new_val)))) { + + SRP_LOG_DBG("A change detected in '%s', op=%d", new_val ? new_val->xpath : old_val->xpath, op); + if_name = sr_xpath_key_value(new_val ? new_val->xpath : old_val->xpath, "interface", "name", &xpath_ctx); + switch (op) { + case SR_OP_CREATED: + case SR_OP_MODIFIED: + op_rc = interface_enable_disable(if_name, new_val->data.bool_val); + break; + case SR_OP_DELETED: + op_rc = interface_enable_disable(if_name, false /* !enable */); + break; + default: + break; + } + sr_xpath_recover(&xpath_ctx); + if (SR_ERR_INVAL_ARG == op_rc) { + sr_set_error(session, "Invalid interface name.", new_val ? new_val->xpath : old_val->xpath); + } + sr_free_val(old_val); + sr_free_val(new_val); + } + sr_free_change_iter(iter); + + return op_rc; +} + +/** + * @brief Add or remove IPv4/IPv6 address to/from an interface. + */ +static int +interface_ipv46_config_add_remove(const char *if_name, uint8_t *addr, uint8_t prefix, bool is_ipv6, bool add) +{ + uint32_t if_index = ~0; + int rc = 0; + + SRP_LOG_DBG("%s IP config on interface '%s'.", add ? "Adding" : "Removing", if_name); + + /* get interface index */ + rc = ietf_interface_name2index(if_name, &if_index); + if (0 != rc) { + SRP_LOG_ERR("Invalid interface name: %s", if_name); + return SR_ERR_INVAL_ARG; + } + + /* add del addr */ + rc = ietf_interface_add_del_addr(if_index, (uint8_t)add, (uint8_t)is_ipv6, 0, prefix, addr); + if (0 != rc) { + SRP_LOG_ERR("Error by processing of the sw_interface_set_flags request, rc=%d", rc); + return SR_ERR_OPERATION_FAILED; + } else { + return SR_ERR_OK; + } +} +int ietf_initSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx) +{ + if(dctx == NULL) + return -1; + + dctx->intfcArray = NULL; + dctx->last_called = false; + dctx->capacity = 0; + dctx->num_ifs = 0; + return 0; +} +int ietf_freeSwInterfaceDumpCTX(ietf_sw_interface_dump_ctx * dctx) +{ + if(dctx == NULL) + return -1; + + if(dctx->intfcArray != NULL) + { + free(dctx->intfcArray); + } + + return ietf_initSwInterfaceDumpCTX(dctx); +} +vapi_error_e +ietf_sw_interface_dump_cb (struct vapi_ctx_s *ctx, void *callback_ctx, + vapi_error_e rv, bool is_last, + vapi_payload_sw_interface_details * reply) +{ + ietf_sw_interface_dump_ctx *dctx = callback_ctx; + if (is_last) + { + dctx->last_called = true; + } + else + { + if(dctx->capacity == 0 && dctx->intfcArray == NULL) + { + dctx->capacity = 10; + dctx->intfcArray = (hicnIntfc*)malloc( sizeof(hicnIntfc)*dctx->capacity ); + } + if(dctx->num_ifs >= dctx->capacity-1) + { + + dctx->capacity += 10; + dctx->intfcArray = (hicnIntfc*)realloc(dctx->intfcArray, sizeof(hicnIntfc)*dctx->capacity ); + } + + hicnIntfc * thisIntfc = &dctx->intfcArray[dctx->num_ifs]; + + thisIntfc->sw_if_index = reply->sw_if_index; + memcpy(thisIntfc->interface_name, reply->interface_name, VPP_INTFC_NAME_LEN); + thisIntfc->l2_address_length = reply->l2_address_length; + memcpy(thisIntfc->l2_address, reply->l2_address, reply->l2_address_length ); + //thisIntfc->link_speed = reply->link_speed; +#define ONE_MEGABIT (uint64_t)1000000 + switch (reply->link_speed << VNET_HW_INTERFACE_FLAG_SPEED_SHIFT) + { + default: + thisIntfc->link_speed = 0; + break; + } + + thisIntfc->link_mtu = reply->link_mtu; + thisIntfc->admin_up_down = reply->admin_up_down; + thisIntfc->link_up_down = reply->link_up_down; + + dctx->num_ifs += 1; + } + return VAPI_OK; +} + +static i32 ietf_interface_name2index(const char *name, u32* if_index) +{ + ARG_CHECK2(-1, name, if_index); + + i32 ret = -1; + ietf_sw_interface_dump_ctx dctx = {false, 0, 0, 0}; + vapi_msg_sw_interface_dump *dump; + vapi_error_e rv; + dctx.last_called = false; + + dump = vapi_alloc_sw_interface_dump(g_vapi_ctx_instance); + dump->payload.name_filter_valid = true; + memcpy(dump->payload.name_filter, name, sizeof(dump->payload.name_filter)); + + while (VAPI_EAGAIN == (rv = vapi_sw_interface_dump(g_vapi_ctx_instance, dump, ietf_sw_interface_dump_cb, &dctx))) + ; + + int i = 0; + for (; i < dctx.num_ifs; ++i) + { + if (strcmp(dctx.intfcArray[i].interface_name, name) == 0) + { + *if_index = dctx.intfcArray[i].sw_if_index; + ret = 0; + break; + } + } + ietf_freeSwInterfaceDumpCTX(&dctx); + + return ret; +} + +i32 ietf_interface_add_del_addr( u32 sw_if_index, u8 is_add, u8 is_ipv6, u8 del_all, + u8 address_length, u8 address[VPP_IP6_ADDRESS_LEN] ) +{ + i32 ret = -1; + vapi_msg_sw_interface_add_del_address *msg = vapi_alloc_sw_interface_add_del_address(g_vapi_ctx_instance); + msg->payload.sw_if_index = sw_if_index; + msg->payload.is_add = is_add; + msg->payload.is_ipv6 = is_ipv6; + msg->payload.del_all = del_all; + msg->payload.address_length = address_length; + memcpy(msg->payload.address, address, VPP_IP6_ADDRESS_LEN); + vapi_msg_sw_interface_add_del_address_hton (msg); + + vapi_send (g_vapi_ctx_instance, msg); + + vapi_msg_sw_interface_add_del_address_reply *resp; + + HICN_VPP_VAPI_RECV; + + vapi_msg_sw_interface_add_del_address_reply_hton(resp); + ret = resp->payload.retval; + vapi_msg_free (g_vapi_ctx_instance, resp); + return ret; +} + +i32 ietf_setInterfaceFlags(u32 sw_if_index, u8 admin_up_down) +{ + i32 ret = -1; + vapi_msg_sw_interface_set_flags *msg = vapi_alloc_sw_interface_set_flags(g_vapi_ctx_instance); + msg->payload.sw_if_index = sw_if_index; + msg->payload.admin_up_down = admin_up_down; + vapi_msg_sw_interface_set_flags_hton (msg); + + vapi_send (g_vapi_ctx_instance, msg); + + vapi_msg_sw_interface_set_flags_reply *resp; + + HICN_VPP_VAPI_RECV; + + vapi_msg_sw_interface_set_flags_reply_ntoh(resp); + ret = resp->payload.retval; + vapi_msg_free (g_vapi_ctx_instance, resp); + return ret; +} + + +/** + * @brief Modify existing IPv4/IPv6 config on an interface. + */ +static int +interface_ipv46_config_modify(sr_session_ctx_t *session, const char *if_name, + sr_val_t *old_val, sr_val_t *new_val, bool is_ipv6) +{ + sr_xpath_ctx_t xpath_ctx = { 0, }; + char *addr_str = NULL; + uint8_t addr[16] = { 0, }; + uint8_t prefix = 0; + int rc = SR_ERR_OK; + + SRP_LOG_DBG("Updating IP config on interface '%s'.", if_name); + + /* get old config to be deleted */ + if (SR_UINT8_T == old_val->type) { + prefix = old_val->data.uint8_val; + } else if (SR_STRING_T == old_val->type) { + prefix = netmask_to_prefix(old_val->data.string_val); + } else { + return SR_ERR_INVAL_ARG; + } + addr_str = sr_xpath_key_value((char*)old_val->xpath, "address", "ip", &xpath_ctx); + ip_addr_str_to_binary(addr_str, addr, is_ipv6); + sr_xpath_recover(&xpath_ctx); + + /* delete old IP config */ + rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, false /* remove */); + if (SR_ERR_OK != rc) { + SRP_LOG_ERR("Unable to remove old IP address config, rc=%d", rc); + return rc; + } + + /* update the config with the new value */ + if (sr_xpath_node_name_eq(new_val->xpath, "prefix-length")) { + prefix = new_val->data.uint8_val; + } else if (sr_xpath_node_name_eq(new_val->xpath, "netmask")) { + prefix = netmask_to_prefix(new_val->data.string_val); + } + + /* set new IP config */ + rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, true /* add */); + if (SR_ERR_OK != rc) { + SRP_LOG_ERR("Unable to remove old IP address config, rc=%d", rc); + return rc; + } + + return rc; +} + +/** + * @brief Callback to be called by any config change in subtrees "/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address" + * or "/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address". + */ +static int +ietf_interface_ipv46_address_change_cb(sr_session_ctx_t *session, const char *xpath, sr_notif_event_t event, void *private_ctx) +{ + sr_change_iter_t *iter = NULL; + sr_change_oper_t op = SR_OP_CREATED; + sr_val_t *old_val = NULL; + sr_val_t *new_val = NULL; + sr_xpath_ctx_t xpath_ctx = { 0, }; + bool is_ipv6 = false, has_addr = false, has_prefix = false; + uint8_t addr[16] = { 0, }; + uint8_t prefix = 0; + char *node_name = NULL, *if_name = NULL; + int rc = SR_ERR_OK, op_rc = SR_ERR_OK; + + /* no-op for apply, we only care about SR_EV_ENABLED, SR_EV_VERIFY, SR_EV_ABORT */ + if (SR_EV_APPLY == event) { + return SR_ERR_OK; + } + SRP_LOG_DBG("'%s' modified, event=%d", xpath, event); + + /* check whether we are handling ipv4 or ipv6 config */ + node_name = sr_xpath_node_idx((char*)xpath, 2, &xpath_ctx); + if (NULL != node_name && 0 == strcmp(node_name, "ipv6")) { + is_ipv6 = true; + } + sr_xpath_recover(&xpath_ctx); + + /* get changes iterator */ + rc = sr_get_changes_iter(session, xpath, &iter); + if (SR_ERR_OK != rc) { + SRP_LOG_ERR("Unable to retrieve change iterator: %s", sr_strerror(rc)); + return rc; + } + + /* iterate over all changes */ + while ((SR_ERR_OK == op_rc || event == SR_EV_ABORT) && + (SR_ERR_OK == (rc = sr_get_change_next(session, iter, &op, &old_val, &new_val)))) { + + SRP_LOG_DBG("A change detected in '%s', op=%d", new_val ? new_val->xpath : old_val->xpath, op); + if_name = strdup(sr_xpath_key_value(new_val ? new_val->xpath : old_val->xpath, "interface", "name", &xpath_ctx)); + sr_xpath_recover(&xpath_ctx); + + switch (op) { + case SR_OP_CREATED: + if (SR_LIST_T == new_val->type) { + /* create on list item - reset state vars */ + has_addr = has_prefix = false; + } else { + if (sr_xpath_node_name_eq(new_val->xpath, "ip")) { + ip_addr_str_to_binary(new_val->data.string_val, addr, is_ipv6); + has_addr = true; + } else if (sr_xpath_node_name_eq(new_val->xpath, "prefix-length")) { + prefix = new_val->data.uint8_val; + has_prefix = true; + } else if (sr_xpath_node_name_eq(new_val->xpath, "netmask")) { + prefix = netmask_to_prefix(new_val->data.string_val); + has_prefix = true; + } + if (has_addr && has_prefix) { + op_rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, true /* add */); + } + } + break; + case SR_OP_MODIFIED: + op_rc = interface_ipv46_config_modify(session, if_name, old_val, new_val, is_ipv6); + break; + case SR_OP_DELETED: + if (SR_LIST_T == old_val->type) { + /* delete on list item - reset state vars */ + has_addr = has_prefix = false; + } else { + if (sr_xpath_node_name_eq(old_val->xpath, "ip")) { + ip_addr_str_to_binary(old_val->data.string_val, addr, is_ipv6); + has_addr = true; + } else if (sr_xpath_node_name_eq(old_val->xpath, "prefix-length")) { + prefix = old_val->data.uint8_val; + has_prefix = true; + } else if (sr_xpath_node_name_eq(old_val->xpath, "netmask")) { + prefix = netmask_to_prefix(old_val->data.string_val); + has_prefix = true; + } + if (has_addr && has_prefix) { + op_rc = interface_ipv46_config_add_remove(if_name, addr, prefix, is_ipv6, false /* !add */); + } + } + break; + default: + break; + } + if (SR_ERR_INVAL_ARG == op_rc) { + sr_set_error(session, "Invalid interface name.", new_val ? new_val->xpath : old_val->xpath); + } + free(if_name); + sr_free_val(old_val); + sr_free_val(new_val); + } + sr_free_change_iter(iter); + + return op_rc; +} + +/** + * @brief Callback to be called by any config change under "/ietf-interfaces:interfaces-state/interface" path. + * Does not provide any functionality, needed just to cover not supported config leaves. + */ +static int +ietf_interface_change_cb(sr_session_ctx_t *session, const char *xpath, sr_notif_event_t event, void *private_ctx) +{ + SRP_LOG_DBG("'%s' modified, event=%d", xpath, event); + + return SR_ERR_OK; +} + + +int ietf_subscribe_events(sr_session_ctx_t *session, + sr_subscription_ctx_t **subscription){ + + int rc = SR_ERR_OK; + SRP_LOG_DBG_MSG("Subscriging ietf."); + + // + rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface", ietf_interface_change_cb, + NULL, + 0, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription); + + if (rc != SR_ERR_OK) { + SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface\n"); + goto error; + } + + rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/enabled", ietf_interface_enable_disable_cb, + NULL, + 100, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription); + if (rc != SR_ERR_OK) { + SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/enabled\n"); + goto error; + } + + rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address", ietf_interface_ipv46_address_change_cb, + NULL, + 99, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription); + + if (rc != SR_ERR_OK) { + SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/ietf-ip:ipv4/address\n"); + goto error; + } + + rc = sr_subtree_change_subscribe(session, "/ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address", ietf_interface_ipv46_address_change_cb, + NULL, + 98, SR_SUBSCR_CTX_REUSE | SR_SUBSCR_EV_ENABLED, subscription); + + if (rc != SR_ERR_OK) { + SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces/interface/ietf-ip:ipv6/address\n"); + goto error; + } + + /* rc = sr_dp_get_items_subscribe(session, "/ietf-interfaces:interfaces-state", ietf_interface_state_cb, + NULL, SR_SUBSCR_CTX_REUSE, + subscription); + if (rc != SR_ERR_OK) { + SRP_LOG_DBG_MSG("Problem in subscription /ietf-interfaces:interfaces-state\n"); + goto error; + }*/ + + + SRP_LOG_INF_MSG("ietf initialized successfully."); + return SR_ERR_OK; + + error: + SRP_LOG_ERR_MSG("Error by initialization of the ietf."); + return rc; +} |