1 files changed, 149 insertions, 0 deletions
diff --git a/genl/genl.c b/genl/genl.c
new file mode 100644
index 0000000..6557e6b
--- /dev/null
+++ b/genl/genl.c
@@ -0,0 +1,149 @@
+/*
+ * genl.c		"genl" utility frontend.
+ *
+ *		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; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * Authors:	Jamal Hadi Salim
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h> /* until we put our own header */
+#include "version.h"
+#include "utils.h"
+#include "genl_utils.h"
+
+int show_stats;
+int show_details;
+int show_raw;
+
+static void *BODY;
+static struct genl_util *genl_list;
+
+
+static int print_nofopt(struct nlmsghdr *n, void *arg)
+{
+	fprintf((FILE *) arg, "unknown genl type ..\n");
+	return 0;
+}
+
+static int parse_nofopt(struct genl_util *f, int argc, char **argv)
+{
+	if (argc) {
+		fprintf(stderr,
+			"Unknown genl \"%s\", hence option \"%s\" is unparsable\n",
+			f->name, *argv);
+		return -1;
+	}
+
+	return 0;
+}
+
+static struct genl_util *get_genl_kind(const char *str)
+{
+	void *dlh;
+	char buf[256];
+	struct genl_util *f;
+
+	for (f = genl_list; f; f = f->next)
+		if (strcmp(f->name, str) == 0)
+			return f;
+
+	snprintf(buf, sizeof(buf), "%s.so", str);
+	dlh = dlopen(buf, RTLD_LAZY);
+	if (dlh == NULL) {
+		dlh = BODY;
+		if (dlh == NULL) {
+			dlh = BODY = dlopen(NULL, RTLD_LAZY);
+			if (dlh == NULL)
+				goto noexist;
+		}
+	}
+
+	snprintf(buf, sizeof(buf), "%s_genl_util", str);
+
+	f = dlsym(dlh, buf);
+	if (f == NULL)
+		goto noexist;
+reg:
+	f->next = genl_list;
+	genl_list = f;
+	return f;
+
+noexist:
+	f = calloc(1, sizeof(*f));
+	if (f) {
+		strncpy(f->name, str, 15);
+		f->parse_genlopt = parse_nofopt;
+		f->print_genlopt = print_nofopt;
+		goto reg;
+	}
+	return f;
+}
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+	fprintf(stderr,
+		"Usage: genl [ OPTIONS ] OBJECT [help] }\n"
+		"where  OBJECT := { ctrl etc }\n"
+		"       OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -V[ersion] | -h[elp] }\n");
+	exit(-1);
+}
+
+int main(int argc, char **argv)
+{
+	while (argc > 1) {
+		if (argv[1][0] != '-')
+			break;
+		if (matches(argv[1], "-stats") == 0 ||
+		    matches(argv[1], "-statistics") == 0) {
+			++show_stats;
+		} else if (matches(argv[1], "-details") == 0) {
+			++show_details;
+		} else if (matches(argv[1], "-raw") == 0) {
+			++show_raw;
+		} else if (matches(argv[1], "-Version") == 0) {
+			printf("genl utility, iproute2-%s\n", version);
+			exit(0);
+		} else if (matches(argv[1], "-help") == 0) {
+			usage();
+		} else {
+			fprintf(stderr,
+				"Option \"%s\" is unknown, try \"genl -help\".\n",
+				argv[1]);
+			exit(-1);
+		}
+		argc--;	argv++;
+	}
+
+	if (argc > 1) {
+		struct genl_util *a;
+		int ret;
+
+		a = get_genl_kind(argv[1]);
+		if (!a) {
+			fprintf(stderr, "bad genl %s\n", argv[1]);
+			exit(-1);
+		}
+
+		ret = a->parse_genlopt(a, argc-1, argv+1);
+		return ret;
+	}
+
+	usage();
+}