--- /dev/null
- gr_copy_escape_part(n_host, vl->host, sizeof(n_host), escape_char, 1);
+ /**
+ * collectd - src/utils_format_graphite.c
+ * Copyright (C) 2012 Thomas Meson
+ * Copyright (C) 2012 Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Thomas Meson <zllak at hycik.org>
+ * Florian octo Forster <octo at collectd.org>
+ **/
+
+ #include "collectd.h"
+
+ #include "plugin.h"
+ #include "utils/common/common.h"
+
+ #include "utils/format_graphite/format_graphite.h"
+ #include "utils_cache.h"
+
+ #define GRAPHITE_FORBIDDEN " \t\"\\:!/()\n\r"
+
+ /* Utils functions to format data sets in graphite format.
+ * Largely taken from write_graphite.c as it remains the same formatting */
+
++/* helper function for reverse_hostname */
++void reverse_string(char *r_host, int len) {
++ char t;
++ for (int i = 0; i < len / 2; i++) {
++ int j = len - i - 1;
++ t = r_host[i];
++ r_host[i] = r_host[j];
++ r_host[j] = t;
++ }
++}
++
++void reverse_hostname(char *r_host, char const *orig_host) {
++ int len_host = strlen(orig_host);
++
++ /* put reversed hostname into working copy */
++ for (int i = 0; i < len_host; i++)
++ r_host[i] = orig_host[len_host - 1 - i];
++ r_host[len_host] = '\0';
++
++ /* reverse labels (except last) */
++ int p = 0;
++ for (int i = 0; i < len_host; i++)
++ if (r_host[i] == '.') {
++ reverse_string(&r_host[p], i - p);
++ p = i + 1;
++ }
++
++ /* reverse last label */
++ reverse_string(&r_host[p], len_host - p);
++}
++
+ static int gr_format_values(char *ret, size_t ret_len, int ds_num,
+ const data_set_t *ds, const value_list_t *vl,
+ gauge_t const *rates) {
+ size_t offset = 0;
+ int status;
+
+ assert(0 == strcmp(ds->type, vl->type));
+
+ memset(ret, 0, ret_len);
+
+ #define BUFFER_ADD(...) \
+ do { \
+ status = snprintf(ret + offset, ret_len - offset, __VA_ARGS__); \
+ if (status < 1) { \
+ return -1; \
+ } else if (((size_t)status) >= (ret_len - offset)) { \
+ return -1; \
+ } else \
+ offset += ((size_t)status); \
+ } while (0)
+
+ if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
+ BUFFER_ADD(GAUGE_FORMAT, vl->values[ds_num].gauge);
+ else if (rates != NULL)
+ BUFFER_ADD("%f", rates[ds_num]);
+ else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
+ BUFFER_ADD("%" PRIu64, (uint64_t)vl->values[ds_num].counter);
+ else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
+ BUFFER_ADD("%" PRIi64, vl->values[ds_num].derive);
+ else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
+ BUFFER_ADD("%" PRIu64, vl->values[ds_num].absolute);
+ else {
+ P_ERROR("gr_format_values: Unknown data source type: %i",
+ ds->ds[ds_num].type);
+ return -1;
+ }
+
+ #undef BUFFER_ADD
+
+ return 0;
+ }
+
+ static void gr_copy_escape_part(char *dst, const char *src, size_t dst_len,
+ char escape_char, bool preserve_separator) {
+ memset(dst, 0, dst_len);
+
+ if (src == NULL)
+ return;
+
+ for (size_t i = 0; i < dst_len; i++) {
+ if (src[i] == 0) {
+ dst[i] = 0;
+ break;
+ }
+
+ if ((!preserve_separator && (src[i] == '.')) || isspace((int)src[i]) ||
+ iscntrl((int)src[i]))
+ dst[i] = escape_char;
+ else
+ dst[i] = src[i];
+ }
+ }
+
+ static int gr_format_name_tagged(char *ret, int ret_len, value_list_t const *vl,
+ char const *ds_name, char const *prefix,
+ char const *postfix, char const escape_char,
+ unsigned int flags) {
+ char n_host[DATA_MAX_NAME_LEN];
+ char n_plugin[DATA_MAX_NAME_LEN];
+ char n_plugin_instance[DATA_MAX_NAME_LEN];
+ char n_type[DATA_MAX_NAME_LEN];
+ char n_type_instance[DATA_MAX_NAME_LEN];
+
+ char tmp_plugin[DATA_MAX_NAME_LEN + 8];
+ char tmp_plugin_instance[DATA_MAX_NAME_LEN + 17];
+ char tmp_type[DATA_MAX_NAME_LEN + 6];
+ char tmp_type_instance[DATA_MAX_NAME_LEN + 15];
+ char tmp_metric[3 * DATA_MAX_NAME_LEN + 2];
+ char tmp_ds_name[DATA_MAX_NAME_LEN + 9];
+
+ if (prefix == NULL)
+ prefix = "";
+
+ if (postfix == NULL)
+ postfix = "";
+
- gr_copy_escape_part(n_host, vl->host, sizeof(n_host), escape_char,
- preserve_separator);
++ if (flags & GRAPHITE_REVERSE_HOST) {
++ int len_host = strlen(vl->host);
++ char r_host[len_host + 1];
++ reverse_hostname(r_host, vl->host);
++ gr_copy_escape_part(n_host, r_host, sizeof(n_host), escape_char, 1);
++ } else {
++ gr_copy_escape_part(n_host, vl->host, sizeof(n_host), escape_char, 1);
++ }
+ gr_copy_escape_part(n_plugin, vl->plugin, sizeof(n_plugin), escape_char, 1);
+ gr_copy_escape_part(n_plugin_instance, vl->plugin_instance,
+ sizeof(n_plugin_instance), escape_char, 1);
+ gr_copy_escape_part(n_type, vl->type, sizeof(n_type), escape_char, 1);
+ gr_copy_escape_part(n_type_instance, vl->type_instance,
+ sizeof(n_type_instance), escape_char, 1);
+
+ snprintf(tmp_plugin, sizeof(tmp_plugin), ";plugin=%s", n_plugin);
+
+ if (n_plugin_instance[0] != '\0')
+ snprintf(tmp_plugin_instance, sizeof(tmp_plugin_instance),
+ ";plugin_instance=%s", n_plugin_instance);
+ else
+ tmp_plugin_instance[0] = '\0';
+
+ if (!(flags & GRAPHITE_DROP_DUPE_FIELDS) || strcmp(n_plugin, n_type) != 0)
+ snprintf(tmp_type, sizeof(tmp_type), ";type=%s", n_type);
+ else
+ tmp_type[0] = '\0';
+
+ if (n_type_instance[0] != '\0') {
+ if (!(flags & GRAPHITE_DROP_DUPE_FIELDS) ||
+ strcmp(n_plugin_instance, n_type_instance) != 0)
+ snprintf(tmp_type_instance, sizeof(tmp_type_instance),
+ ";type_instance=%s", n_type_instance);
+ else
+ tmp_type_instance[0] = '\0';
+ } else
+ tmp_type_instance[0] = '\0';
+
+ /* Assert always_append_ds -> ds_name */
+ assert(!(flags & GRAPHITE_ALWAYS_APPEND_DS) || (ds_name != NULL));
+ if (ds_name != NULL) {
+ snprintf(tmp_ds_name, sizeof(tmp_ds_name), ";ds_name=%s", ds_name);
+
+ if ((flags & GRAPHITE_DROP_DUPE_FIELDS) && strcmp(n_plugin, n_type) == 0)
+ snprintf(tmp_metric, sizeof(tmp_metric), "%s.%s", n_plugin, ds_name);
+ else
+ snprintf(tmp_metric, sizeof(tmp_metric), "%s.%s.%s", n_plugin, n_type,
+ ds_name);
+ } else {
+ tmp_ds_name[0] = '\0';
+
+ if ((flags & GRAPHITE_DROP_DUPE_FIELDS) && strcmp(n_plugin, n_type) == 0)
+ snprintf(tmp_metric, sizeof(tmp_metric), "%s", n_plugin);
+ else
+ snprintf(tmp_metric, sizeof(tmp_metric), "%s.%s", n_plugin, n_type);
+ }
+
+ snprintf(ret, ret_len, "%s%s%s;host=%s%s%s%s%s%s", prefix, tmp_metric,
+ postfix, n_host, tmp_plugin, tmp_plugin_instance, tmp_type,
+ tmp_type_instance, tmp_ds_name);
+
+ return 0;
+ }
+
+ static int gr_format_name(char *ret, int ret_len, value_list_t const *vl,
+ char const *ds_name, char const *prefix,
+ char const *postfix, char const escape_char,
+ unsigned int flags) {
+ char n_host[DATA_MAX_NAME_LEN];
+ char n_plugin[DATA_MAX_NAME_LEN];
+ char n_plugin_instance[DATA_MAX_NAME_LEN];
+ char n_type[DATA_MAX_NAME_LEN];
+ char n_type_instance[DATA_MAX_NAME_LEN];
+
+ char tmp_plugin[2 * DATA_MAX_NAME_LEN + 1];
+ char tmp_type[2 * DATA_MAX_NAME_LEN + 1];
+
+ if (prefix == NULL)
+ prefix = "";
+
+ if (postfix == NULL)
+ postfix = "";
+
+ bool preserve_separator = (flags & GRAPHITE_PRESERVE_SEPARATOR);
+
++ if (flags & GRAPHITE_REVERSE_HOST) {
++ int len_host = strlen(vl->host);
++ char r_host[len_host + 1];
++ reverse_hostname(r_host, vl->host);
++ gr_copy_escape_part(n_host, r_host, sizeof(n_host), escape_char,
++ preserve_separator);
++ } else {
++ gr_copy_escape_part(n_host, vl->host, sizeof(n_host), escape_char,
++ preserve_separator);
++ }
+ gr_copy_escape_part(n_plugin, vl->plugin, sizeof(n_plugin), escape_char,
+ preserve_separator);
+ gr_copy_escape_part(n_plugin_instance, vl->plugin_instance,
+ sizeof(n_plugin_instance), escape_char,
+ preserve_separator);
+ gr_copy_escape_part(n_type, vl->type, sizeof(n_type), escape_char,
+ preserve_separator);
+ gr_copy_escape_part(n_type_instance, vl->type_instance,
+ sizeof(n_type_instance), escape_char, preserve_separator);
+
+ if (n_plugin_instance[0] != '\0')
+ snprintf(tmp_plugin, sizeof(tmp_plugin), "%s%c%s", n_plugin,
+ (flags & GRAPHITE_SEPARATE_INSTANCES) ? '.' : '-',
+ n_plugin_instance);
+ else
+ sstrncpy(tmp_plugin, n_plugin, sizeof(tmp_plugin));
+
+ if (n_type_instance[0] != '\0') {
+ if ((flags & GRAPHITE_DROP_DUPE_FIELDS) && strcmp(n_plugin, n_type) == 0)
+ sstrncpy(tmp_type, n_type_instance, sizeof(tmp_type));
+ else
+ snprintf(tmp_type, sizeof(tmp_type), "%s%c%s", n_type,
+ (flags & GRAPHITE_SEPARATE_INSTANCES) ? '.' : '-',
+ n_type_instance);
+ } else
+ sstrncpy(tmp_type, n_type, sizeof(tmp_type));
+
+ /* Assert always_append_ds -> ds_name */
+ assert(!(flags & GRAPHITE_ALWAYS_APPEND_DS) || (ds_name != NULL));
+ if (ds_name != NULL) {
+ if ((flags & GRAPHITE_DROP_DUPE_FIELDS) &&
+ strcmp(tmp_plugin, tmp_type) == 0)
+ snprintf(ret, ret_len, "%s%s%s.%s.%s", prefix, n_host, postfix,
+ tmp_plugin, ds_name);
+ else
+ snprintf(ret, ret_len, "%s%s%s.%s.%s.%s", prefix, n_host, postfix,
+ tmp_plugin, tmp_type, ds_name);
+ } else
+ snprintf(ret, ret_len, "%s%s%s.%s.%s", prefix, n_host, postfix, tmp_plugin,
+ tmp_type);
+
+ return 0;
+ }
+
+ static void escape_graphite_string(char *buffer, char escape_char) {
+ assert(strchr(GRAPHITE_FORBIDDEN, escape_char) == NULL);
+
+ for (char *head = buffer + strcspn(buffer, GRAPHITE_FORBIDDEN); *head != '\0';
+ head += strcspn(head, GRAPHITE_FORBIDDEN))
+ *head = escape_char;
+ }
+
+ int format_graphite(char *buffer, size_t buffer_size, data_set_t const *ds,
+ value_list_t const *vl, char const *prefix,
+ char const *postfix, char const escape_char,
+ unsigned int flags) {
+ int status = 0;
+ int buffer_pos = 0;
+
+ gauge_t *rates = NULL;
+ if (flags & GRAPHITE_STORE_RATES) {
+ rates = uc_get_rate(ds, vl);
+ if (rates == NULL) {
+ P_ERROR("format_graphite: error with uc_get_rate");
+ return -1;
+ }
+ }
+
+ for (size_t i = 0; i < ds->ds_num; i++) {
+ char const *ds_name = NULL;
+ char key[10 * DATA_MAX_NAME_LEN];
+ char values[512];
+ size_t message_len;
+ char message[1024];
+
+ if ((flags & GRAPHITE_ALWAYS_APPEND_DS) || (ds->ds_num > 1))
+ ds_name = ds->ds[i].name;
+
+ /* Copy the identifier to `key' and escape it. */
+ if (flags & GRAPHITE_USE_TAGS) {
+ status = gr_format_name_tagged(key, sizeof(key), vl, ds_name, prefix,
+ postfix, escape_char, flags);
+ if (status != 0) {
+ P_ERROR("format_graphite: error with gr_format_name_tagged");
+ sfree(rates);
+ return status;
+ }
+ } else {
+ status = gr_format_name(key, sizeof(key), vl, ds_name, prefix, postfix,
+ escape_char, flags);
+ if (status != 0) {
+ P_ERROR("format_graphite: error with gr_format_name");
+ sfree(rates);
+ return status;
+ }
+ }
+
+ escape_graphite_string(key, escape_char);
+
+ /* Convert the values to an ASCII representation and put that into
+ * `values'. */
+ status = gr_format_values(values, sizeof(values), i, ds, vl, rates);
+ if (status != 0) {
+ P_ERROR("format_graphite: error with gr_format_values");
+ sfree(rates);
+ return status;
+ }
+
+ /* Compute the graphite command */
+ message_len =
+ (size_t)snprintf(message, sizeof(message), "%s %s %u\r\n", key, values,
+ (unsigned int)CDTIME_T_TO_TIME_T(vl->time));
+ if (message_len >= sizeof(message)) {
+ P_ERROR("format_graphite: message buffer too small: "
+ "Need %" PRIsz " bytes.",
+ message_len + 1);
+ sfree(rates);
+ return -ENOMEM;
+ }
+
+ /* Append it in case we got multiple data set */
+ if ((buffer_pos + message_len) >= buffer_size) {
+ P_ERROR("format_graphite: target buffer too small");
+ sfree(rates);
+ return -ENOMEM;
+ }
+ memcpy((void *)(buffer + buffer_pos), message, message_len);
+ buffer_pos += message_len;
+ buffer[buffer_pos] = '\0';
+ }
+ sfree(rates);
+ return status;
+ } /* int format_graphite */
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