diff options
Diffstat (limited to 'src/nm-cloud-setup/nmcs-provider-azure.c')
| -rw-r--r-- | src/nm-cloud-setup/nmcs-provider-azure.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/src/nm-cloud-setup/nmcs-provider-azure.c b/src/nm-cloud-setup/nmcs-provider-azure.c new file mode 100644 index 00000000..b3f0c68b --- /dev/null +++ b/src/nm-cloud-setup/nmcs-provider-azure.c @@ -0,0 +1,565 @@ +/* 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; +} |