/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "libnm-client-aux-extern/nm-default-client.h" #include "nmcs-provider-azure.h" #include "nm-cloud-setup-utils.h" /*****************************************************************************/ #define HTTP_TIMEOUT_MS 3000 #define NM_AZURE_METADATA_HEADER "Metadata:true" #define NM_AZURE_HOST "169.254.169.254" #define NM_AZURE_BASE "http://" NM_AZURE_HOST #define NM_AZURE_API_VERSION "?format=text&api-version=2017-04-02" #define NM_AZURE_METADATA_URL_BASE /* $NM_AZURE_BASE/$NM_AZURE_API_VERSION */ \ "/metadata/instance/network/interface/" #define _azure_uri_concat(...) \ nmcs_utils_uri_build_concat(NM_AZURE_BASE, __VA_ARGS__, NM_AZURE_API_VERSION) #define _azure_uri_interfaces(...) _azure_uri_concat(NM_AZURE_METADATA_URL_BASE, ##__VA_ARGS__) /*****************************************************************************/ struct _NMCSProviderAzure { NMCSProvider parent; }; struct _NMCSProviderAzureClass { NMCSProviderClass parent; }; G_DEFINE_TYPE(NMCSProviderAzure, nmcs_provider_azure, NMCS_TYPE_PROVIDER); /*****************************************************************************/ static void _detect_get_meta_data_done_cb(GObject *source, GAsyncResult *result, gpointer user_data) { gs_unref_object GTask *task = user_data; gs_free_error GError *get_error = NULL; gs_free_error GError *error = NULL; nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, NULL, &get_error); if (nm_utils_error_is_cancelled(get_error)) { g_task_return_error(task, g_steal_pointer(&get_error)); return; } if (get_error) { nm_utils_error_set(&error, NM_UTILS_ERROR_UNKNOWN, "failure to get Azure metadata: %s", get_error->message); g_task_return_error(task, g_steal_pointer(&error)); return; } g_task_return_boolean(task, TRUE); } static void detect(NMCSProvider *provider, GTask *task) { NMHttpClient *http_client; gs_free char *uri = NULL; http_client = nmcs_provider_get_http_client(provider); nm_http_client_poll_get(http_client, (uri = _azure_uri_concat("/metadata/instance")), HTTP_TIMEOUT_MS, 256 * 1024, 7000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), g_task_get_cancellable(task), NULL, NULL, _detect_get_meta_data_done_cb, task); } /*****************************************************************************/ typedef enum { GET_CONFIG_FETCH_TYPE_IPV4_IPADDRESS_X_PRIVATEIPADDRESS, GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_ADDRESS, GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_PREFIX, } GetConfigFetchType; typedef struct { NMCSProviderGetConfigTaskData *get_config_data; NMCSProviderGetConfigIfaceData *iface_get_config; gssize intern_iface_idx; gssize extern_iface_idx; guint n_iface_data_pending; } AzureIfaceData; static void _azure_iface_data_destroy(AzureIfaceData *iface_data) { nm_g_slice_free(iface_data); } static void _get_config_fetch_done_cb(NMHttpClient *http_client, GAsyncResult *result, AzureIfaceData *iface_data, GetConfigFetchType fetch_type) { NMCSProviderGetConfigTaskData *get_config_data; NMCSProviderGetConfigIfaceData *iface_get_config; gs_unref_bytes GBytes *response = NULL; gs_free_error GError *error = NULL; const char *resp_str = NULL; gsize resp_len; char tmp_addr_str[NM_UTILS_INET_ADDRSTRLEN]; in_addr_t tmp_addr; int tmp_prefix = -1; nm_http_client_poll_get_finish(http_client, result, NULL, &response, &error); if (nm_utils_error_is_cancelled(error)) return; get_config_data = iface_data->get_config_data; iface_get_config = iface_data->iface_get_config; if (error) goto out_done; resp_str = g_bytes_get_data(response, &resp_len); nm_assert(resp_str[resp_len] == '\0'); switch (fetch_type) { case GET_CONFIG_FETCH_TYPE_IPV4_IPADDRESS_X_PRIVATEIPADDRESS: if (!nmcs_utils_ipaddr_normalize_bin(AF_INET, resp_str, resp_len, NULL, &tmp_addr)) { error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "ip is not a valid private ip address"); goto out_done; } _LOGD("interface[%" G_GSSIZE_FORMAT "]: received address %s", iface_data->intern_iface_idx, _nm_utils_inet4_ntop(tmp_addr, tmp_addr_str)); iface_get_config->ipv4s_arr[iface_get_config->ipv4s_len] = tmp_addr; iface_get_config->has_ipv4s = TRUE; iface_get_config->ipv4s_len++; break; case GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_ADDRESS: if (!nmcs_utils_ipaddr_normalize_bin(AF_INET, resp_str, resp_len, NULL, &tmp_addr)) { error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "ip is not a subnet address"); goto out_done; } _LOGD("interface[%" G_GSSIZE_FORMAT "]: received subnet address %s", iface_data->intern_iface_idx, _nm_utils_inet4_ntop(tmp_addr, tmp_addr_str)); iface_get_config->cidr_addr = tmp_addr; break; case GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_PREFIX: tmp_prefix = _nm_utils_ascii_str_to_int64_bin(resp_str, resp_len, 10, 0, 32, -1); if (tmp_prefix == -1) { _LOGD("interface[%" G_GSSIZE_FORMAT "]: invalid prefix", iface_data->intern_iface_idx); error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "subnet does not give a valid prefix"); goto out_done; } _LOGD("interface[%" G_GSSIZE_FORMAT "]: received subnet prefix %d", iface_data->intern_iface_idx, tmp_prefix); iface_get_config->cidr_prefix = tmp_prefix; break; } out_done: if (!error) { --iface_data->n_iface_data_pending; if (iface_data->n_iface_data_pending > 0) return; /* we surely have cidr_addr and cidr_prefix, otherwise * we would have errored out above. */ iface_get_config->has_cidr = TRUE; } --get_config_data->n_pending; _nmcs_provider_get_config_task_maybe_return(get_config_data, g_steal_pointer(&error)); } static void _get_config_fetch_done_cb_ipv4_ipaddress_x_privateipaddress(GObject *source, GAsyncResult *result, gpointer user_data) { _get_config_fetch_done_cb(NM_HTTP_CLIENT(source), result, user_data, GET_CONFIG_FETCH_TYPE_IPV4_IPADDRESS_X_PRIVATEIPADDRESS); } static void _get_config_fetch_done_cb_ipv4_subnet_0_address(GObject *source, GAsyncResult *result, gpointer user_data) { _get_config_fetch_done_cb(NM_HTTP_CLIENT(source), result, user_data, GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_ADDRESS); } static void _get_config_fetch_done_cb_ipv4_subnet_0_prefix(GObject *source, GAsyncResult *result, gpointer user_data) { _get_config_fetch_done_cb(NM_HTTP_CLIENT(source), result, user_data, GET_CONFIG_FETCH_TYPE_IPV4_SUBNET_0_PREFIX); } static void _get_config_ips_prefix_list_cb(GObject *source, GAsyncResult *result, gpointer user_data) { gs_unref_bytes GBytes *response = NULL; AzureIfaceData *iface_data = user_data; gs_free_error GError *error = NULL; const char *response_str = NULL; gsize response_len; NMCSProviderGetConfigTaskData *get_config_data; const char *line; gsize line_len; char iface_idx_str[30]; nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); if (nm_utils_error_is_cancelled(error)) return; get_config_data = iface_data->get_config_data; if (error) goto out_error; response_str = g_bytes_get_data(response, &response_len); /* NMHttpClient guarantees that there is a trailing NUL after the data. */ nm_assert(response_str[response_len] == 0); nm_assert(!iface_data->iface_get_config->ipv4s_arr); nm_assert(!iface_data->iface_get_config->has_ipv4s); nm_assert(!iface_data->iface_get_config->has_cidr); nm_sprintf_buf(iface_idx_str, "%" G_GSSIZE_FORMAT, iface_data->intern_iface_idx); while (nm_utils_parse_next_line(&response_str, &response_len, &line, &line_len)) { gint64 ips_prefix_idx; gs_free char *uri = NULL; char buf[100]; if (line_len == 0) continue; /* Truncate the string. It's safe to do, because we own @response an it has an * extra NULL character after the buffer. */ ((char *) line)[line_len] = '\0'; if (line[line_len - 1] == '/') ((char *) line)[--line_len] = '\0'; ips_prefix_idx = _nm_utils_ascii_str_to_int64(line, 10, 0, G_MAXINT64, -1); if (ips_prefix_idx < 0) continue; iface_data->n_iface_data_pending++; nm_http_client_poll_get( NM_HTTP_CLIENT(source), (uri = _azure_uri_interfaces(iface_idx_str, "/ipv4/ipAddress/", nm_sprintf_buf(buf, "%" G_GINT64_FORMAT, ips_prefix_idx), "/privateIpAddress")), HTTP_TIMEOUT_MS, 512 * 1024, 10000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_config_fetch_done_cb_ipv4_ipaddress_x_privateipaddress, iface_data); } iface_data->iface_get_config->ipv4s_len = 0; iface_data->iface_get_config->ipv4s_arr = g_new(in_addr_t, iface_data->n_iface_data_pending); { gs_free char *uri = NULL; iface_data->n_iface_data_pending++; nm_http_client_poll_get( NM_HTTP_CLIENT(source), (uri = _azure_uri_interfaces(iface_idx_str, "/ipv4/subnet/0/address/")), HTTP_TIMEOUT_MS, 512 * 1024, 10000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_config_fetch_done_cb_ipv4_subnet_0_address, iface_data); nm_clear_g_free(&uri); iface_data->n_iface_data_pending++; nm_http_client_poll_get( NM_HTTP_CLIENT(source), (uri = _azure_uri_interfaces(iface_idx_str, "/ipv4/subnet/0/prefix/")), HTTP_TIMEOUT_MS, 512 * 1024, 10000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_config_fetch_done_cb_ipv4_subnet_0_prefix, iface_data); } return; out_error: --get_config_data->n_pending; _nmcs_provider_get_config_task_maybe_return(get_config_data, g_steal_pointer(&error)); } static void _get_config_iface_cb(GObject *source, GAsyncResult *result, gpointer user_data) { NMCSProviderGetConfigTaskData *get_config_data; gs_unref_bytes GBytes *response = NULL; AzureIfaceData *iface_data = user_data; gs_free char *v_hwaddr = NULL; gs_free_error GError *error = NULL; gs_free const char *uri = NULL; char buf[100]; nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); if (nm_utils_error_is_cancelled(error)) return; get_config_data = iface_data->get_config_data; if (error) goto out_done; v_hwaddr = nmcs_utils_hwaddr_normalize_gbytes(response); if (!v_hwaddr) { _LOGI("interface[%" G_GSSIZE_FORMAT "]: invalid MAC address returned", iface_data->intern_iface_idx); error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "invalid MAC address for index %" G_GSSIZE_FORMAT, iface_data->intern_iface_idx); goto out_done; } iface_data->iface_get_config = g_hash_table_lookup(get_config_data->result_dict, v_hwaddr); if (!iface_data->iface_get_config) { if (!get_config_data->any) { _LOGD("get-config: skip fetching meta data for %s (%" G_GSSIZE_FORMAT ")", v_hwaddr, iface_data->intern_iface_idx); goto out_done; } iface_data->iface_get_config = nmcs_provider_get_config_iface_data_create(get_config_data->result_dict, FALSE, v_hwaddr); } else { if (iface_data->iface_get_config->iface_idx >= 0) { _LOGI("interface[%" G_GSSIZE_FORMAT "]: duplicate MAC address %s returned", iface_data->intern_iface_idx, iface_data->iface_get_config->hwaddr); error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "duplicate MAC address for index %" G_GSSIZE_FORMAT, iface_data->intern_iface_idx); goto out_done; } } iface_data->iface_get_config->iface_idx = iface_data->extern_iface_idx; _LOGD("interface[%" G_GSSIZE_FORMAT "]: found a matching device with hwaddr %s", iface_data->intern_iface_idx, iface_data->iface_get_config->hwaddr); nm_sprintf_buf(buf, "%" G_GSSIZE_FORMAT "/ipv4/ipAddress/", iface_data->intern_iface_idx); nm_http_client_poll_get(NM_HTTP_CLIENT(source), (uri = _azure_uri_interfaces(buf)), HTTP_TIMEOUT_MS, 512 * 1024, 10000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_config_ips_prefix_list_cb, iface_data); return; out_done: --get_config_data->n_pending; _nmcs_provider_get_config_task_maybe_return(get_config_data, g_steal_pointer(&error)); } static void _get_net_ifaces_list_cb(GObject *source, GAsyncResult *result, gpointer user_data) { NMCSProviderGetConfigTaskData *get_config_data; gs_unref_ptrarray GPtrArray *ifaces_arr = NULL; gs_unref_bytes GBytes *response = NULL; gs_free_error GError *error = NULL; const char *response_str; gsize response_len; const char *line; gsize line_len; guint i; gssize extern_iface_idx_cnt = 0; nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); if (nm_utils_error_is_cancelled(error)) return; get_config_data = user_data; if (error) { _nmcs_provider_get_config_task_maybe_return(get_config_data, g_steal_pointer(&error)); return; } response_str = g_bytes_get_data(response, &response_len); /* NMHttpClient guarantees that there is a trailing NUL after the data. */ nm_assert(response_str[response_len] == 0); ifaces_arr = g_ptr_array_new_with_free_func((GDestroyNotify) _azure_iface_data_destroy); while (nm_utils_parse_next_line(&response_str, &response_len, &line, &line_len)) { AzureIfaceData *iface_data; gssize intern_iface_idx; if (line_len == 0) continue; /* Truncate the string. It's safe to do, because we own @response an it has an * extra NULL character after the buffer. */ ((char *) line)[line_len] = '\0'; if (line[line_len - 1] == '/') ((char *) line)[--line_len] = '\0'; intern_iface_idx = _nm_utils_ascii_str_to_int64(line, 10, 0, G_MAXSSIZE, -1); if (intern_iface_idx < 0) continue; iface_data = g_slice_new(AzureIfaceData); *iface_data = (AzureIfaceData){ .get_config_data = get_config_data, .iface_get_config = NULL, .intern_iface_idx = intern_iface_idx, .extern_iface_idx = extern_iface_idx_cnt++, .n_iface_data_pending = 0, }; g_ptr_array_add(ifaces_arr, iface_data); } _LOGD("found azure interfaces: %u", ifaces_arr->len); if (ifaces_arr->len == 0) { _nmcs_provider_get_config_task_maybe_return( get_config_data, nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "no Azure interfaces found")); return; } for (i = 0; i < ifaces_arr->len; ++i) { AzureIfaceData *iface_data = ifaces_arr->pdata[i]; gs_free const char *uri = NULL; char buf[100]; _LOGD("azure interface[%" G_GSSIZE_FORMAT "]: retrieving configuration", iface_data->intern_iface_idx); nm_sprintf_buf(buf, "%" G_GSSIZE_FORMAT "/macAddress", iface_data->intern_iface_idx); get_config_data->n_pending++; nm_http_client_poll_get(NM_HTTP_CLIENT(source), (uri = _azure_uri_interfaces(buf)), HTTP_TIMEOUT_MS, 512 * 1024, 10000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_config_iface_cb, iface_data); } get_config_data->extra_data_destroy = (GDestroyNotify) g_ptr_array_unref; get_config_data->extra_data = g_steal_pointer(&ifaces_arr); } static void get_config(NMCSProvider *provider, NMCSProviderGetConfigTaskData *get_config_data) { gs_free const char *uri = NULL; nm_http_client_poll_get(nmcs_provider_get_http_client(provider), (uri = _azure_uri_interfaces()), HTTP_TIMEOUT_MS, 256 * 1024, 15000, 1000, NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), get_config_data->intern_cancellable, NULL, NULL, _get_net_ifaces_list_cb, get_config_data); } /*****************************************************************************/ static void nmcs_provider_azure_init(NMCSProviderAzure *self) {} static void nmcs_provider_azure_class_init(NMCSProviderAzureClass *klass) { NMCSProviderClass *provider_class = NMCS_PROVIDER_CLASS(klass); provider_class->_name = "azure"; provider_class->_env_provider_enabled = NMCS_ENV_VARIABLE("NM_CLOUD_SETUP_AZURE"); provider_class->detect = detect; provider_class->get_config = get_config; }