Adding upstream version 6.1.0.upstream/6.1.0upstream

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

1 files changed, 250 insertions, 0 deletions

diff --git a/ip/ipnetconf.c b/ip/ipnetconf.c
new file mode 100644
index 0000000..bb0ebe1
--- /dev/null
+++ b/ip/ipnetconf.c
@@ -0,0 +1,250 @@
+/*
+ * ipnetconf.c		"ip netconf".
+ *
+ *		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:	Nicolas Dichtel, <nicolas.dichtel@6wind.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+static struct {
+	int family;
+	int ifindex;
+} filter;
+
+static const char * const rp_filter_names[] = {
+	"off", "strict", "loose"
+};
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+	fprintf(stderr, "Usage: ip netconf show [ dev STRING ]\n");
+	exit(-1);
+}
+
+static struct rtattr *netconf_rta(struct netconfmsg *ncm)
+{
+	return (struct rtattr *)((char *)ncm
+				 + NLMSG_ALIGN(sizeof(struct netconfmsg)));
+}
+
+int print_netconf(struct rtnl_ctrl_data *ctrl, struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = (FILE *)arg;
+	struct netconfmsg *ncm = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+	struct rtattr *tb[NETCONFA_MAX+1];
+	int ifindex = 0;
+
+	if (n->nlmsg_type == NLMSG_ERROR)
+		return -1;
+
+	if (n->nlmsg_type != RTM_NEWNETCONF &&
+	    n->nlmsg_type != RTM_DELNETCONF) {
+		fprintf(stderr, "Not a netconf message: %08x %08x %08x\n",
+			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+
+		return -1;
+	}
+	len -= NLMSG_SPACE(sizeof(*ncm));
+	if (len < 0) {
+		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+		return -1;
+	}
+
+	if (filter.family && filter.family != ncm->ncm_family)
+		return 0;
+
+	parse_rtattr(tb, NETCONFA_MAX, netconf_rta(ncm),
+		     NLMSG_PAYLOAD(n, sizeof(*ncm)));
+
+	if (tb[NETCONFA_IFINDEX])
+		ifindex = rta_getattr_u32(tb[NETCONFA_IFINDEX]);
+
+	if (filter.ifindex && filter.ifindex != ifindex)
+		return 0;
+
+	open_json_object(NULL);
+	if (n->nlmsg_type == RTM_DELNETCONF)
+		print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+
+	print_string(PRINT_ANY, "family",
+		     "%s ", family_name(ncm->ncm_family));
+
+	if (tb[NETCONFA_IFINDEX]) {
+		const char *dev;
+
+		switch (ifindex) {
+		case NETCONFA_IFINDEX_ALL:
+			dev = "all";
+			break;
+		case NETCONFA_IFINDEX_DEFAULT:
+			dev = "default";
+			break;
+		default:
+			dev = ll_index_to_name(ifindex);
+			break;
+		}
+		print_color_string(PRINT_ANY, COLOR_IFNAME,
+				   "interface", "%s ", dev);
+	}
+
+	if (tb[NETCONFA_FORWARDING])
+		print_on_off(PRINT_ANY, "forwarding", "forwarding %s ",
+			     rta_getattr_u32(tb[NETCONFA_FORWARDING]));
+
+	if (tb[NETCONFA_RP_FILTER]) {
+		__u32 rp_filter = rta_getattr_u32(tb[NETCONFA_RP_FILTER]);
+
+		if (rp_filter < ARRAY_SIZE(rp_filter_names))
+			print_string(PRINT_ANY, "rp_filter",
+				     "rp_filter %s ",
+				     rp_filter_names[rp_filter]);
+		else
+			print_uint(PRINT_ANY, "rp_filter",
+				   "rp_filter %u ", rp_filter);
+	}
+
+	if (tb[NETCONFA_MC_FORWARDING])
+		print_on_off(PRINT_ANY, "mc_forwarding", "mc_forwarding %s ",
+			     rta_getattr_u32(tb[NETCONFA_MC_FORWARDING]));
+
+	if (tb[NETCONFA_PROXY_NEIGH])
+		print_on_off(PRINT_ANY, "proxy_neigh", "proxy_neigh %s ",
+			     rta_getattr_u32(tb[NETCONFA_PROXY_NEIGH]));
+
+	if (tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN])
+		print_on_off(PRINT_ANY, "ignore_routes_with_linkdown",
+			     "ignore_routes_with_linkdown %s ",
+			     rta_getattr_u32(tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN]));
+
+	if (tb[NETCONFA_INPUT])
+		print_on_off(PRINT_ANY, "input", "input %s ",
+			     rta_getattr_u32(tb[NETCONFA_INPUT]));
+
+	close_json_object();
+	print_string(PRINT_FP, NULL, "\n", NULL);
+	fflush(fp);
+	return 0;
+}
+
+static int print_netconf2(struct nlmsghdr *n, void *arg)
+{
+	return print_netconf(NULL, n, arg);
+}
+
+void ipnetconf_reset_filter(int ifindex)
+{
+	memset(&filter, 0, sizeof(filter));
+	filter.ifindex = ifindex;
+}
+
+static int do_show(int argc, char **argv)
+{
+	struct {
+		struct nlmsghdr		n;
+		struct netconfmsg	ncm;
+		char			buf[1024];
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct netconfmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+		.n.nlmsg_type = RTM_GETNETCONF,
+	};
+
+	ipnetconf_reset_filter(0);
+	filter.family = preferred_family;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "dev") == 0) {
+			NEXT_ARG();
+			filter.ifindex = ll_name_to_index(*argv);
+			if (filter.ifindex <= 0) {
+				fprintf(stderr,
+					"Device \"%s\" does not exist.\n",
+					*argv);
+				return -1;
+			}
+		}
+		argv++; argc--;
+	}
+
+	ll_init_map(&rth);
+
+	if (filter.ifindex && filter.family != AF_UNSPEC) {
+		req.ncm.ncm_family = filter.family;
+		addattr_l(&req.n, sizeof(req), NETCONFA_IFINDEX,
+			  &filter.ifindex, sizeof(filter.ifindex));
+
+		if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
+			perror("Can not send request");
+			exit(1);
+		}
+		rtnl_listen(&rth, print_netconf, stdout);
+	} else {
+		rth.flags = RTNL_HANDLE_F_SUPPRESS_NLERR;
+dump:
+		if (rtnl_netconfdump_req(&rth, filter.family) < 0) {
+			perror("Cannot send dump request");
+			exit(1);
+		}
+
+		new_json_obj(json);
+		if (rtnl_dump_filter(&rth, print_netconf2, stdout) < 0) {
+			/* kernel does not support netconf dump on AF_UNSPEC;
+			 * fall back to requesting by family
+			 */
+			if (errno == EOPNOTSUPP &&
+			    filter.family == AF_UNSPEC) {
+				filter.family = AF_INET;
+				goto dump;
+			}
+			perror("RTNETLINK answers");
+			fprintf(stderr, "Dump terminated\n");
+			exit(1);
+		}
+		delete_json_obj();
+		if (preferred_family == AF_UNSPEC && filter.family == AF_INET) {
+			preferred_family = AF_INET6;
+			filter.family = AF_INET6;
+			goto dump;
+		}
+	}
+	return 0;
+}
+
+int do_ipnetconf(int argc, char **argv)
+{
+	if (argc > 0) {
+		if (matches(*argv, "show") == 0 ||
+		    matches(*argv, "lst") == 0 ||
+		    matches(*argv, "list") == 0)
+			return do_show(argc-1, argv+1);
+		if (matches(*argv, "help") == 0)
+			usage();
+	} else
+		return do_show(0, NULL);
+
+	fprintf(stderr,
+		"Command \"%s\" is unknown, try \"ip netconf help\".\n",
+		*argv);
+	exit(-1);
+}