Adding upstream version 3.2.1+dfsg.upstream/3.2.1+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 382 insertions, 0 deletions

diff --git a/src/main/collectd.c b/src/main/collectd.c
new file mode 100644
index 0000000..77f0db0
--- /dev/null
+++ b/src/main/collectd.c
@@ -0,0 +1,382 @@
+/*
+ *   This program is 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; either version 2 of the License, or (at
+ *   your option) any later version.
+ *
+ *   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
+ */
+
+/**
+ * $Id$
+ * @file collectd.c
+ * @brief Helper functions to enabled radsniff to talk to collectd
+ *
+ * @copyright 2013 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ */
+#include <assert.h>
+#include <ctype.h>
+
+#ifdef HAVE_COLLECTDC_H
+#include <collectd/client.h>
+#include <freeradius-devel/radsniff.h>
+
+/** Copy a 64bit unsigned integer into a double
+ *
+ */
+/*
+static void _copy_uint64_to_double(UNUSED rs_t *conf, rs_stats_value_tmpl_t *tmpl)
+{
+	assert(tmpl->src);
+	assert(tmpl->dst);
+
+	*((double *) tmpl->dst) = *((uint64_t *) tmpl->src);
+}
+*/
+
+/*
+static void _copy_uint64_to_uint64(UNUSED rs_t *conf, rs_stats_value_tmpl_t *tmpl)
+{
+	assert(tmpl->src);
+	assert(tmpl->dst);
+
+	*((uint64_t *) tmpl->dst) = *((uint64_t *) tmpl->src);
+}
+*/
+
+static void _copy_double_to_double(UNUSED rs_t *conf, rs_stats_value_tmpl_t *tmpl)
+{
+	assert(tmpl->src);
+	assert(tmpl->dst);
+
+	*((double *) tmpl->dst) = *((double*) tmpl->src);
+}
+
+
+/** Allocates a stats template which describes a single guage/counter
+ *
+ * This is just intended to simplify allocating a fairly complex memory structure
+ * src and dst pointers must be set
+ *
+ * @param ctx Context to allocate collectd struct in.
+ * @param conf Radsniff configuration.
+ * @param plugin_instance usually the type of packet (in our case).
+ * @param type string, the name of a collection of stats e.g. exchange
+ * @param type_instance the name of the counter/guage within the collection e.g. latency.
+ * @param stats structure to derive statistics from.
+ * @param values Value templates used to populate lcc_value_list.
+ * @return a new rs_stats_tmpl_t on success or NULL on failure.
+ */
+static rs_stats_tmpl_t *rs_stats_collectd_init(TALLOC_CTX *ctx, rs_t *conf,
+					       char const *plugin_instance,
+					       char const *type, char const *type_instance,
+					       void *stats,
+					       rs_stats_value_tmpl_t const *values)
+{
+	static char hostname[255];
+	static char fqdn[LCC_NAME_LEN];
+
+	size_t len;
+	int i;
+	char *p;
+
+	rs_stats_tmpl_t *tmpl;
+	lcc_value_list_t *value;
+
+	assert(conf);
+	assert(type);
+	assert(type_instance);
+
+	for (len = 0; values[len].src; len++) {} ;
+	assert(len > 0);
+
+	/*
+	 *	Initialise hostname once so we don't call gethostname every time
+	 */
+	if (*fqdn == '\0') {
+		int ret;
+		struct addrinfo hints, *info = NULL;
+
+		if (gethostname(hostname, sizeof(hostname)) < 0) {
+			ERROR("Error getting hostname: %s", fr_syserror(errno));
+
+			return NULL;
+		}
+
+		memset(&hints, 0, sizeof hints);
+		hints.ai_family = AF_UNSPEC; /*either IPV4 or IPV6*/
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_flags = AI_CANONNAME;
+
+		if ((ret = getaddrinfo(hostname, "radius", &hints, &info)) != 0) {
+			ERROR("Error getting hostname: %s", gai_strerror(ret));
+			return NULL;
+		}
+
+		strlcpy(fqdn, info->ai_canonname, sizeof(fqdn));
+
+		freeaddrinfo(info);
+	}
+
+	tmpl = talloc_zero(ctx, rs_stats_tmpl_t);
+	if (!tmpl) {
+		return NULL;
+	}
+
+	tmpl->value_tmpl = talloc_zero_array(tmpl, rs_stats_value_tmpl_t, len);
+	if (!tmpl->value_tmpl) {
+		goto error;
+	}
+
+	tmpl->stats = stats;
+
+	value = talloc_zero(tmpl, lcc_value_list_t);
+	if (!value) {
+		goto error;
+	}
+	tmpl->value = value;
+
+	value->interval = conf->stats.interval;
+	value->values_len = len;
+
+	value->values_types = talloc_zero_array(value, int, len);
+	if (!value->values_types) {
+		goto error;
+	}
+
+	value->values = talloc_zero_array(value, value_t, len);
+	if (!value->values) {
+		goto error;
+	}
+
+	for (i = 0; i < (int) len; i++) {
+		assert(values[i].src);
+		assert(values[i].cb);
+
+		tmpl->value_tmpl[i] = values[i];
+		switch (tmpl->value_tmpl[i].type) {
+		case LCC_TYPE_COUNTER:
+			tmpl->value_tmpl[i].dst = &value->values[i].counter;
+			break;
+
+		case LCC_TYPE_GAUGE:
+			tmpl->value_tmpl[i].dst = &value->values[i].gauge;
+			break;
+
+		case LCC_TYPE_DERIVE:
+			tmpl->value_tmpl[i].dst = &value->values[i].derive;
+			break;
+
+		case LCC_TYPE_ABSOLUTE:
+			tmpl->value_tmpl[i].dst = &value->values[i].absolute;
+			break;
+
+		default:
+			assert(0);
+		}
+		value->values_types[i] = tmpl->value_tmpl[i].type;
+	}
+
+	/*
+	 *	These should be OK as is
+	 */
+	strlcpy(value->identifier.host, fqdn, sizeof(value->identifier.host));
+
+	/*
+	 *	Plugin is ASCII only and no '/'
+	 */
+	fr_prints(value->identifier.plugin, sizeof(value->identifier.plugin),
+		  conf->stats.prefix, strlen(conf->stats.prefix), '\0');
+	for (p = value->identifier.plugin; *p; ++p) {
+		if ((*p == '-') || (*p == '/'))*p = '_';
+	}
+
+	/*
+	 *	Plugin instance is ASCII only (assuming printable only) and no '/'
+	 */
+	fr_prints(value->identifier.plugin_instance, sizeof(value->identifier.plugin_instance),
+		  plugin_instance, strlen(plugin_instance), '\0');
+	for (p = value->identifier.plugin_instance; *p; ++p) {
+		if ((*p == '-') || (*p == '/')) *p = '_';
+	}
+
+	/*
+	 *	Type is ASCII only (assuming printable only) and no '/' or '-'
+	 */
+	fr_prints(value->identifier.type, sizeof(value->identifier.type),
+		  type, strlen(type), '\0');
+	for (p = value->identifier.type; *p; ++p) {
+		if ((*p == '-') || (*p == '/')) *p = '_';
+	}
+
+	fr_prints(value->identifier.type_instance, sizeof(value->identifier.type_instance),
+		  type_instance, strlen(type_instance), '\0');
+	for (p = value->identifier.type_instance; *p; ++p) {
+		if ((*p == '-') || (*p == '/')) *p = '_';
+	}
+
+
+	return tmpl;
+
+error:
+	talloc_free(tmpl);
+	return NULL;
+}
+
+
+/** Setup stats templates for latency
+ *
+ */
+rs_stats_tmpl_t *rs_stats_collectd_init_latency(TALLOC_CTX *ctx, rs_stats_tmpl_t **out, rs_t *conf,
+						char const *type, rs_latency_t *stats, PW_CODE code)
+{
+	rs_stats_tmpl_t **tmpl, *last;
+	char *p;
+	char buffer[LCC_NAME_LEN];
+	tmpl = out;
+
+	rs_stats_value_tmpl_t rtx[(RS_RETRANSMIT_MAX + 1) + 1 + 1];	// RTX bins + 0 bin + lost + NULL
+	int i;
+
+	/* not static so were thread safe */
+	rs_stats_value_tmpl_t const _packet_count[] = {
+		{ &stats->interval.received, LCC_TYPE_GAUGE,  _copy_double_to_double, NULL },
+		{ &stats->interval.linked, LCC_TYPE_GAUGE,  _copy_double_to_double, NULL },
+		{ &stats->interval.unlinked, LCC_TYPE_GAUGE,  _copy_double_to_double, NULL },
+		{ &stats->interval.reused, LCC_TYPE_GAUGE,  _copy_double_to_double, NULL },
+		{ NULL, 0, NULL, NULL }
+	};
+
+	rs_stats_value_tmpl_t const _latency[] = {
+		{ &stats->latency_smoothed, LCC_TYPE_GAUGE, _copy_double_to_double, NULL },
+		{ &stats->interval.latency_average, LCC_TYPE_GAUGE, _copy_double_to_double, NULL },
+		{ &stats->interval.latency_high, LCC_TYPE_GAUGE, _copy_double_to_double, NULL },
+		{ &stats->interval.latency_low, LCC_TYPE_GAUGE, _copy_double_to_double, NULL },
+		{ NULL, 0, NULL, NULL }
+	};
+
+#define INIT_STATS(_ti, _v) do {\
+		strlcpy(buffer, fr_packet_codes[code], sizeof(buffer)); \
+		for (p = buffer; *p; ++p) *p = tolower(*p);\
+		last = *tmpl = rs_stats_collectd_init(ctx, conf, type, _ti, buffer, stats, _v);\
+		if (!*tmpl) {\
+			TALLOC_FREE(*out);\
+			return NULL;\
+		}\
+		tmpl = &(*tmpl)->next;\
+		ctx = *tmpl;\
+		} while (0)
+
+
+	INIT_STATS("radius_count", _packet_count);
+	INIT_STATS("radius_latency", _latency);
+
+	for (i = 0; i < (RS_RETRANSMIT_MAX + 1); i++) {
+		rtx[i].src = &stats->interval.rt[i];
+		rtx[i].type = LCC_TYPE_GAUGE;
+		rtx[i].cb = _copy_double_to_double;
+		rtx[i].dst = NULL;
+	}
+
+	rtx[i].src = &stats->interval.lost;
+	rtx[i].type = LCC_TYPE_GAUGE;
+	rtx[i].cb = _copy_double_to_double;
+	rtx[i].dst = NULL;
+
+	memset(&rtx[++i], 0, sizeof(rs_stats_value_tmpl_t));
+
+	INIT_STATS("radius_rtx", rtx);
+
+	return last;
+}
+
+/** Refresh and send the stats to the collectd server
+ *
+ */
+void rs_stats_collectd_do_stats(rs_t *conf, rs_stats_tmpl_t *tmpls, struct timeval *now)
+{
+	rs_stats_tmpl_t *tmpl = tmpls;
+	char identifier[6 * LCC_NAME_LEN];
+	int i;
+
+	while (tmpl) {
+		/*
+		 *	Refresh the value of whatever were sending
+		 */
+		for (i = 0; i < (int) tmpl->value->values_len; i++) {
+			tmpl->value_tmpl[i].cb(conf, &tmpl->value_tmpl[i]);
+		}
+
+		tmpl->value->time = now->tv_sec;
+
+		lcc_identifier_to_string(conf->stats.handle, identifier, sizeof(identifier), &tmpl->value->identifier);
+
+		if (lcc_putval(conf->stats.handle, tmpl->value) < 0) {
+			char const *error;
+
+			error = lcc_strerror(conf->stats.handle);
+			ERROR("Failed PUTVAL \"%s\" interval=%i %" PRIu64 " : %s",
+			      identifier,
+			      (int) tmpl->value->interval,
+			      (uint64_t) tmpl->value->time,
+			      error ? error : "unknown error");
+		}
+
+		tmpl = tmpl->next;
+	}
+}
+
+/** Connect to a collectd server for stats output
+ *
+ * @param[in,out] conf radsniff configuration, we write the generated handle here.
+ * @return 0 on success -1 on failure.
+ */
+int rs_stats_collectd_open(rs_t *conf)
+{
+	assert(conf->stats.collectd);
+
+	/*
+	 *	Tear down stale connections gracefully.
+	 */
+	rs_stats_collectd_close(conf);
+
+	/*
+	 *	There's no way to get the error from the connection handle
+	 *	because it's freed on failure, before lcc returns.
+	 */
+	if (lcc_connect(conf->stats.collectd, &conf->stats.handle) < 0) {
+		ERROR("Failed opening connection to collectd: %s", fr_syserror(errno));
+		return -1;
+	}
+	DEBUG2("Connected to \"%s\"", conf->stats.collectd);
+
+	assert(conf->stats.handle);
+	return 0;
+}
+
+/** Close connection
+ *
+ * @param[in,out] conf radsniff configuration.
+ * @return 0 on success -1 on failure.
+ */
+int rs_stats_collectd_close(rs_t *conf)
+{
+	assert(conf->stats.collectd);
+
+	int ret = 0;
+
+	if (conf->stats.handle) {
+		ret = lcc_disconnect(conf->stats.handle);
+		conf->stats.handle = NULL;
+	}
+
+	return ret;
+}
+#endif