diff options
Diffstat (limited to 'clients/cloud-setup/nmcs-provider-azure.c')
| -rw-r--r-- | clients/cloud-setup/nmcs-provider-azure.c | 530 |
1 files changed, 530 insertions, 0 deletions
diff --git a/clients/cloud-setup/nmcs-provider-azure.c b/clients/cloud-setup/nmcs-provider-azure.c new file mode 100644 index 00000000..1a80327c --- /dev/null +++ b/clients/cloud-setup/nmcs-provider-azure.c @@ -0,0 +1,530 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "nm-default.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; + gboolean success; + + success = + 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; + } + + if (!success) { + nm_utils_error_set(&error, NM_UTILS_ERROR_UNKNOWN, "failure to detect azure metadata"); + 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 struct { + NMCSProviderGetConfigTaskData *config_data; + guint n_ifaces_pending; + GError * error; +} AzureData; + +typedef struct { + NMCSProviderGetConfigIfaceData *iface_get_config; + AzureData * azure_data; + gssize iface_idx; + guint n_ips_prefix_pending; + char * hwaddr; +} AzureIfaceData; + +static void +_azure_iface_data_free(AzureIfaceData *iface_data) +{ + g_free(iface_data->hwaddr); + nm_g_slice_free(iface_data); +} + +static void +_get_config_maybe_task_return(AzureData *azure_data, GError *error_take) +{ + NMCSProviderGetConfigTaskData *config_data = azure_data->config_data; + + if (error_take) { + if (!azure_data->error) + azure_data->error = error_take; + else if (!nm_utils_error_is_cancelled(azure_data->error) + && nm_utils_error_is_cancelled(error_take)) { + nm_clear_error(&azure_data->error); + azure_data->error = error_take; + } else + g_error_free(error_take); + } + + if (azure_data->n_ifaces_pending > 0) + return; + + if (azure_data->error) { + if (nm_utils_error_is_cancelled(azure_data->error)) + _LOGD("get-config: cancelled"); + else + _LOGD("get-config: failed: %s", azure_data->error->message); + g_task_return_error(config_data->task, g_steal_pointer(&azure_data->error)); + } else { + _LOGD("get-config: success"); + g_task_return_pointer(config_data->task, + g_hash_table_ref(config_data->result_dict), + (GDestroyNotify) g_hash_table_unref); + } + + nm_g_slice_free(azure_data); + g_object_unref(config_data->task); +} + +static void +_get_config_fetch_done_cb(NMHttpClient *http_client, + GAsyncResult *result, + gpointer user_data, + gboolean is_ipv4) +{ + NMCSProviderGetConfigIfaceData *iface_get_config; + gs_unref_bytes GBytes *response = NULL; + AzureIfaceData * iface_data = user_data; + gs_free_error GError *error = NULL; + const char * fip_str = NULL; + AzureData * azure_data; + + azure_data = iface_data->azure_data; + + nm_http_client_poll_get_finish(http_client, result, NULL, &response, &error); + + if (error) + goto done; + + if (!error) { + in_addr_t tmp_addr; + int tmp_prefix; + + fip_str = g_bytes_get_data(response, NULL); + iface_data->iface_get_config = + g_hash_table_lookup(azure_data->config_data->result_dict, iface_data->hwaddr); + iface_get_config = iface_data->iface_get_config; + iface_get_config->iface_idx = iface_data->iface_idx; + + if (is_ipv4) { + if (!nm_utils_parse_inaddr_bin(AF_INET, fip_str, NULL, &tmp_addr)) { + error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, + "ip is not a valid private ip address"); + goto done; + } + _LOGD("interface[%" G_GSSIZE_FORMAT "]: adding private ip %s", + iface_data->iface_idx, + fip_str); + iface_get_config->ipv4s_arr[iface_get_config->ipv4s_len] = tmp_addr; + iface_get_config->has_ipv4s = TRUE; + iface_get_config->ipv4s_len++; + } else { + tmp_prefix = (_nm_utils_ascii_str_to_int64(fip_str, 10, 0, 32, -1)); + + if (tmp_prefix == -1) { + _LOGD("interface[%" G_GSSIZE_FORMAT "]: invalid prefix %d", + iface_data->iface_idx, + tmp_prefix); + goto done; + } + _LOGD("interface[%" G_GSSIZE_FORMAT "]: adding prefix %d", + iface_data->iface_idx, + tmp_prefix); + iface_get_config->cidr_prefix = tmp_prefix; + iface_get_config->has_cidr = TRUE; + } + } + +done: + --iface_data->n_ips_prefix_pending; + if (iface_data->n_ips_prefix_pending == 0) { + _azure_iface_data_free(iface_data); + --azure_data->n_ifaces_pending; + _get_config_maybe_task_return(azure_data, g_steal_pointer(&error)); + } +} + +static void +_get_config_fetch_done_cb_private_ipv4s(GObject *source, GAsyncResult *result, gpointer user_data) +{ + _get_config_fetch_done_cb(NM_HTTP_CLIENT(source), result, user_data, TRUE); +} + +static void +_get_config_fetch_done_cb_subnet_cidr_prefix(GObject * source, + GAsyncResult *result, + gpointer user_data) +{ + _get_config_fetch_done_cb(NM_HTTP_CLIENT(source), result, user_data, FALSE); +} + +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; + AzureData * azure_data; + const char * line; + gsize line_len; + + azure_data = iface_data->azure_data; + + nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); + if (error) + goto done; + + 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->has_ipv4s); + nm_assert(!iface_data->iface_get_config->ipv4s_arr); + nm_assert(!iface_data->iface_get_config->has_cidr); + + while (nm_utils_parse_next_line(&response_str, &response_len, &line, &line_len)) { + gint64 ips_prefix_idx; + + if (line_len == 0) + continue; + /* Truncate the string. It's safe to do, because we own @response_data 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; + + { + gs_free const char *uri = NULL; + char buf[100]; + + iface_data->n_ips_prefix_pending++; + + nm_http_client_poll_get( + NM_HTTP_CLIENT(source), + (uri = _azure_uri_interfaces(nm_sprintf_buf( + buf, + "%" G_GSSIZE_FORMAT "/ipv4/ipAddress/%" G_GINT64_FORMAT "/privateIpAddress", + iface_data->iface_idx, + ips_prefix_idx))), + HTTP_TIMEOUT_MS, + 512 * 1024, + 10000, + 1000, + NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), + g_task_get_cancellable(azure_data->config_data->task), + NULL, + NULL, + _get_config_fetch_done_cb_private_ipv4s, + 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_ips_prefix_pending); + + { + gs_free const char *uri = NULL; + char buf[30]; + + iface_data->n_ips_prefix_pending++; + nm_http_client_poll_get( + NM_HTTP_CLIENT(source), + (uri = _azure_uri_interfaces( + nm_sprintf_buf(buf, "%" G_GSSIZE_FORMAT, iface_data->iface_idx), + "/ipv4/subnet/0/prefix/")), + HTTP_TIMEOUT_MS, + 512 * 1024, + 10000, + 1000, + NM_MAKE_STRV(NM_AZURE_METADATA_HEADER), + g_task_get_cancellable(azure_data->config_data->task), + NULL, + NULL, + _get_config_fetch_done_cb_subnet_cidr_prefix, + iface_data); + } + return; + +done: + _azure_iface_data_free(iface_data); + --azure_data->n_ifaces_pending; + _get_config_maybe_task_return(azure_data, g_steal_pointer(&error)); +} + +static void +_get_config_iface_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; + gs_free const char * uri = NULL; + char buf[100]; + AzureData * azure_data; + + azure_data = iface_data->azure_data; + + nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); + + if (error) + goto done; + + iface_data->hwaddr = nmcs_utils_hwaddr_normalize(g_bytes_get_data(response, NULL), -1); + + if (!iface_data->hwaddr) { + goto done; + } + + iface_data->iface_get_config = + g_hash_table_lookup(azure_data->config_data->result_dict, iface_data->hwaddr); + + if (!iface_data->iface_get_config) { + if (!iface_data->azure_data->config_data->any) { + _LOGD("interface[%" G_GSSIZE_FORMAT "]: ignore hwaddr %s", + iface_data->iface_idx, + iface_data->hwaddr); + goto done; + } + iface_data->iface_get_config = nmcs_provider_get_config_iface_data_new(FALSE); + g_hash_table_insert(azure_data->config_data->result_dict, + g_strdup(iface_data->hwaddr), + iface_data->iface_get_config); + } + + _LOGD("interface[%" G_GSSIZE_FORMAT "]: found a matching device with hwaddr %s", + iface_data->iface_idx, + iface_data->hwaddr); + + nm_sprintf_buf(buf, "%" G_GSSIZE_FORMAT "/ipv4/ipAddress/", iface_data->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), + g_task_get_cancellable(azure_data->config_data->task), + NULL, + NULL, + _get_config_ips_prefix_list_cb, + iface_data); + return; + +done: + nm_g_slice_free(iface_data); + --azure_data->n_ifaces_pending; + _get_config_maybe_task_return(azure_data, g_steal_pointer(&error)); +} + +static void +_get_net_ifaces_list_cb(GObject *source, GAsyncResult *result, gpointer user_data) +{ + gs_unref_ptrarray GPtrArray *ifaces_arr = NULL; + gs_unref_bytes GBytes *response = NULL; + gs_free_error GError *error = NULL; + AzureData * azure_data = user_data; + const char * response_str; + gsize response_len; + const char * line; + gsize line_len; + guint i; + + nm_http_client_poll_get_finish(NM_HTTP_CLIENT(source), result, NULL, &response, &error); + + if (error) { + _get_config_maybe_task_return(azure_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(); + + while (nm_utils_parse_next_line(&response_str, &response_len, &line, &line_len)) { + AzureIfaceData *iface_data; + gssize iface_idx; + + if (line_len == 0) + continue; + + /* Truncate the string. It's safe to do, because we own @response_data an it has an + * extra NULL character after the buffer. */ + ((char *) line)[line_len] = '\0'; + + if (line[line_len - 1] == '/' && line_len != 0) + ((char *) line)[--line_len] = '\0'; + + iface_idx = _nm_utils_ascii_str_to_int64(line, 10, 0, G_MAXSSIZE, -1); + if (iface_idx < 0) + continue; + + iface_data = g_slice_new(AzureIfaceData); + *iface_data = (AzureIfaceData){ + .iface_get_config = NULL, + .azure_data = azure_data, + .iface_idx = iface_idx, + .n_ips_prefix_pending = 0, + .hwaddr = NULL, + }; + g_ptr_array_add(ifaces_arr, iface_data); + } + + _LOGD("found azure interfaces: %u", ifaces_arr->len); + + if (ifaces_arr->len == 0) { + error = nm_utils_error_new(NM_UTILS_ERROR_UNKNOWN, "no Azure interfaces found"); + _get_config_maybe_task_return(azure_data, g_steal_pointer(&error)); + return; + } + + for (i = 0; i < ifaces_arr->len; ++i) { + AzureIfaceData * data = ifaces_arr->pdata[i]; + gs_free const char *uri = NULL; + char buf[100]; + + _LOGD("azure interface[%" G_GSSIZE_FORMAT "]: retrieving configuration", data->iface_idx); + + nm_sprintf_buf(buf, "%" G_GSSIZE_FORMAT "/macAddress", data->iface_idx); + + azure_data->n_ifaces_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), + g_task_get_cancellable(azure_data->config_data->task), + NULL, + NULL, + _get_config_iface_cb, + data); + } +} + +static void +get_config(NMCSProvider *provider, NMCSProviderGetConfigTaskData *get_config_data) +{ + gs_free const char *uri = NULL; + AzureData * azure_data; + + azure_data = g_slice_new(AzureData); + *azure_data = (AzureData){ + .config_data = get_config_data, + .n_ifaces_pending = 0, + }; + + 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), + g_task_get_cancellable(get_config_data->task), + NULL, + NULL, + _get_net_ifaces_list_cb, + azure_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; +} |