X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fcommon.c;h=c6a651dc56248050ccc0b7a50c7aca68e4f2c3f9;hb=902f7621661d97dac0c7bc83f39acbf76a3b947b;hp=7c2c30eccf38b1bcc498264727679b6be3270031;hpb=5137825deeb5d4a5b763185f45b3916ccc49340d;p=collectd.git

diff --git a/src/common.c b/src/common.c
index 7c2c30ec..c6a651dc 100644
--- a/src/common.c
+++ b/src/common.c
@@ -1,6 +1,6 @@
 /**
  * collectd - src/common.c
- * Copyright (C) 2005-2008  Florian octo Forster
+ * Copyright (C) 2005-2009  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
@@ -43,6 +43,15 @@
 # include <arpa/inet.h>
 #endif
 
+/* for getaddrinfo */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+#if HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
 #ifdef HAVE_LIBKSTAT
 extern kstat_ctl_t *kc;
 #endif
@@ -1071,3 +1080,56 @@ counter_t counter_diff (counter_t old_value, counter_t new_value)
 
 	return (diff);
 } /* counter_t counter_to_gauge */
+
+int service_name_to_port_number (const char *service_name)
+{
+	struct addrinfo *ai_list;
+	struct addrinfo *ai_ptr;
+	struct addrinfo ai_hints;
+	int status;
+	int service_number;
+
+	if (service_name == NULL)
+		return (-1);
+
+	ai_list = NULL;
+	memset (&ai_hints, 0, sizeof (ai_hints));
+	ai_hints.ai_family = AF_UNSPEC;
+
+	status = getaddrinfo (/* node = */ NULL, service_name,
+			&ai_hints, &ai_list);
+	if (status != 0)
+	{
+		ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
+				gai_strerror (status));
+		return (-1);
+	}
+
+	service_number = -1;
+	for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+	{
+		if (ai_ptr->ai_family == AF_INET)
+		{
+			struct sockaddr_in *sa;
+
+			sa = (void *) ai_ptr->ai_addr;
+			service_number = (int) ntohs (sa->sin_port);
+		}
+		else if (ai_ptr->ai_family == AF_INET6)
+		{
+			struct sockaddr_in6 *sa;
+
+			sa = (void *) ai_ptr->ai_addr;
+			service_number = (int) ntohs (sa->sin6_port);
+		}
+
+		if ((service_number > 0) && (service_number <= 65535))
+			break;
+	}
+
+	freeaddrinfo (ai_list);
+
+	if ((service_number > 0) && (service_number <= 65535))
+		return (service_number);
+	return (-1);
+} /* int service_name_to_port_number */