Add idiag-socket-details

This small program lists all sockets on the system seen by netlink and serves
as a simple example showing how to alloc an idiag msg cache and dump the
objects in it.

3 files changed, 95 insertions, 1 deletions

diff --git a/src/.gitignore b/src/.gitignore
index 3e091cb5..0b99435b 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -42,3 +42,4 @@ nl-classid-lookup
 nl-pktloc-lookup
 nl-link-enslave
 nl-link-release
+idiag-socket-details
diff --git a/src/Makefile.am b/src/Makefile.am
index 6541f6dc..87dd8712 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -37,7 +37,8 @@ noinst_PROGRAMS = \
 	nl-list-caches nl-list-sockets \
 	nl-util-addr \
 	nl-link-enslave \
-	nl-link-release
+	nl-link-release \
+	idiag-socket-details
 
 genl_ctrl_list_SOURCES = genl-ctrl-list.c 
 
@@ -99,3 +100,5 @@ nl_util_addr_SOURCES = nl-util-addr.c
 nl_pktloc_lookup_SOURCES = nl-pktloc-lookup.c
 
 nl_classid_lookup_SOURCES = nl-classid-lookup.c
+
+idiag_socket_details_SOURCES = idiag-socket-details.c
diff --git a/src/idiag-socket-details.c b/src/idiag-socket-details.c
new file mode 100644
index 00000000..95686768
--- /dev/null
+++ b/src/idiag-socket-details.c
@@ -0,0 +1,90 @@
+/*
+ * src/idiag-socket-details.c     List socket details
+ *
+ *	This library 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 version 2 of the License.
+ *
+ * Copyright (c) 2013 Sassano Systems LLC <joe@sassanosystems.com>
+ */
+
+#include <netlink/cli/utils.h>
+#include <netlink/idiag/idiagnl.h>
+#include <netlink/idiag/msg.h>
+#include <linux/netlink.h>
+
+static void print_usage(void)
+{
+	printf(
+"Usage: idiag-socket-details [OPTION]\n"
+"\n"
+"Options\n"
+"     --summary		    Show socket detail summary.\n"
+"     --details             Show socket details on multiple lines.\n"
+"     --stats               Show full socket statistics.\n"
+" -h, --help                Show this help.\n"
+" -v, --version             Show versioning information.\n"
+	);
+	exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+	struct nl_sock *sock;
+	struct nl_cache *idiag_cache;
+	struct nl_dump_params params = {
+		.dp_type = NL_DUMP_LINE,
+		.dp_nl_cb = NULL,
+		.dp_fd = stdout,
+	};
+	int err = 0;
+
+	sock = nl_cli_alloc_socket();
+	nl_cli_connect(sock, NETLINK_INET_DIAG);
+	for (;;) {
+		int c, optidx = 0;
+		enum {
+			ARG_SUMMARY = 257,
+			ARG_DETAILS = 258,
+			ARG_STATS = 259,
+			ARG_FAMILY,
+		};
+		static struct option long_opts[] = {
+			{ "details", 0, 0, ARG_DETAILS },
+			{ "summary", 0, 0, ARG_SUMMARY },
+			{ "stats", 0, 0, ARG_STATS},
+			{ "help", 0, 0, 'h' },
+			{ "version", 0, 0, 'v' },
+			{ 0, 0, 0, 0 }
+		};
+
+		c = getopt_long(argc, argv, "hv", long_opts, &optidx);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case '?': exit(NLE_INVAL);
+		case ARG_SUMMARY: params.dp_type = NL_DUMP_LINE; break;
+		case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
+		case ARG_STATS:   params.dp_type = NL_DUMP_STATS; break;
+		case 'h': print_usage(); break;
+		case 'v': nl_cli_print_version(); break;
+		}
+	}
+
+	if ((err = idiagnl_msg_alloc_cache(sock, AF_INET, IDIAG_SS_ALL,
+					&idiag_cache))) {
+		nl_cli_fatal(err, "Unable to allocate idiag msg cache: %s",
+				nl_geterror(err));
+	}
+
+	nl_cache_mngt_provide(idiag_cache);
+
+	nl_cache_dump_filter(idiag_cache, &params, NULL);
+
+	nl_cache_mngt_unprovide(idiag_cache);
+	nl_cache_free(idiag_cache);
+	nl_socket_free(sock);
+
+	return 0;
+}