Merge branch 'master' into net-next

Makefile

@@ -34,8 +34,8 @@ ADDLIB+=ipx_ntop.o ipx_pton.o
 #options for mpls
 ADDLIB+=mpls_ntop.o mpls_pton.o
 
-CC = gcc
-HOSTCC = gcc
+CC := gcc
+HOSTCC ?= $(CC)
 DEFINES += -D_GNU_SOURCE
 # Turn on transparent support for LFS
 DEFINES += -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE

bridge/br_common.h

@@ -23,4 +23,5 @@ extern int show_stats;
 extern int show_details;
 extern int timestamp;
 extern int compress_vlans;
+extern int json_output;
 extern struct rtnl_handle rth;

bridge/bridge.c

@@ -23,6 +23,7 @@ int oneline;
 int show_stats;
 int show_details;
 int compress_vlans;
+int json_output;
 int timestamp;
 char *batch_file;
 int force;
@@ -38,7 +39,7 @@ static void usage(void)
 "where	OBJECT := { link | fdb | mdb | vlan | monitor }\n"
 "	OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"
 "		     -o[neline] | -t[imestamp] | -n[etns] name |\n"
-"		     -c[ompressvlans] }\n");
+"		     -c[ompressvlans] -j{son} }\n");
 	exit(-1);
 }
 
@@ -173,6 +174,8 @@ main(int argc, char **argv)
 			++compress_vlans;
 		} else if (matches(opt, "-force") == 0) {
 			++force;
+		} else if (matches(opt, "-json") == 0) {
+			++json_output;
 		} else if (matches(opt, "-batch") == 0) {
 			argc--;
 			argv++;

bridge/fdb.c

@@ -21,6 +21,8 @@
 #include <linux/neighbour.h>
 #include <string.h>
 #include <limits.h>
+#include <json_writer.h>
+#include <stdbool.h>
 
 #include "libnetlink.h"
 #include "br_common.h"
@@ -29,6 +31,8 @@
 
 static unsigned int filter_index, filter_vlan;
 
+json_writer_t *jw_global;
+
 static void usage(void)
 {
 	fprintf(stderr, "Usage: bridge fdb { add | append | del | replace } ADDR dev DEV\n"
@@ -59,6 +63,15 @@ static const char *state_n2a(unsigned int s)
 	return buf;
 }
 
+static void start_json_fdb_flags_array(bool *fdb_flags)
+{
+	if (*fdb_flags)
+		return;
+	jsonw_name(jw_global, "flags");
+	jsonw_start_array(jw_global);
+	*fdb_flags = true;
+}
+
 int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 {
 	FILE *fp = arg;
@@ -66,11 +79,12 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 	int len = n->nlmsg_len;
 	struct rtattr *tb[NDA_MAX+1];
 	__u16 vid = 0;
+	bool fdb_flags = false;
+	const char *state_s;
 
 	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
 		fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
 			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
-
 		return 0;
 	}
 
@@ -86,6 +100,11 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 	if (filter_index && filter_index != r->ndm_ifindex)
 		return 0;
 
+	if (jw_global) {
+		jsonw_pretty(jw_global, 1);
+		jsonw_start_object(jw_global);
+	}
+
 	parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
 		     n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
 
@@ -95,40 +114,75 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 	if (filter_vlan && filter_vlan != vid)
 		return 0;
 
-	if (n->nlmsg_type == RTM_DELNEIGH)
-		fprintf(fp, "Deleted ");
+	if (n->nlmsg_type == RTM_DELNEIGH) {
+		if (jw_global)
+			jsonw_string_field(jw_global, "opCode", "deleted");
+		else
+			fprintf(fp, "Deleted ");
+	}
 
 	if (tb[NDA_LLADDR]) {
 		SPRINT_BUF(b1);
-		fprintf(fp, "%s ",
-			ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
-				    RTA_PAYLOAD(tb[NDA_LLADDR]),
-				    ll_index_to_type(r->ndm_ifindex),
-				    b1, sizeof(b1)));
+		ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
+			    RTA_PAYLOAD(tb[NDA_LLADDR]),
+			    ll_index_to_type(r->ndm_ifindex),
+			    b1, sizeof(b1));
+		if (jw_global)
+			jsonw_string_field(jw_global, "mac", b1);
+		else
+			fprintf(fp, "%s ", b1);
 	}
 
-	if (!filter_index && r->ndm_ifindex)
-		fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
+	if (!filter_index && r->ndm_ifindex) {
+		if (jw_global)
+			jsonw_string_field(jw_global, "dev",
+					   ll_index_to_name(r->ndm_ifindex));
+		else
+			fprintf(fp, "dev %s ",
+				ll_index_to_name(r->ndm_ifindex));
+	}
 
 	if (tb[NDA_DST]) {
 		int family = AF_INET;
+		const char *abuf_s;
 
 		if (RTA_PAYLOAD(tb[NDA_DST]) == sizeof(struct in6_addr))
 			family = AF_INET6;
 
-		fprintf(fp, "dst %s ",
-			format_host(family,
-				    RTA_PAYLOAD(tb[NDA_DST]),
-				    RTA_DATA(tb[NDA_DST])));
+		abuf_s = format_host(family,
+				     RTA_PAYLOAD(tb[NDA_DST]),
+				     RTA_DATA(tb[NDA_DST]));
+		if (jw_global)
+			jsonw_string_field(jw_global, "dst", abuf_s);
+		else
+			fprintf(fp, "dst %s ", abuf_s);
 	}
 
-	if (vid)
-		fprintf(fp, "vlan %hu ", vid);
+	if (vid) {
+		if (jw_global)
+			jsonw_uint_field(jw_global, "vlan", vid);
+		else
+			fprintf(fp, "vlan %hu ", vid);
+	}
+
+	if (tb[NDA_PORT]) {
+		if (jw_global)
+			jsonw_uint_field(jw_global, "port",
+					 ntohs(rta_getattr_u16(tb[NDA_PORT])));
+		else
+			fprintf(fp, "port %d ",
+				ntohs(rta_getattr_u16(tb[NDA_PORT])));
+	}
+
+	if (tb[NDA_VNI]) {
+		if (jw_global)
+			jsonw_uint_field(jw_global, "vni",
+					 rta_getattr_u32(tb[NDA_VNI]));
+		else
+			fprintf(fp, "vni %d ",
+				rta_getattr_u32(tb[NDA_VNI]));
+	}
 
-	if (tb[NDA_PORT])
-		fprintf(fp, "port %d ", ntohs(rta_getattr_u16(tb[NDA_PORT])));
-	if (tb[NDA_VNI])
-		fprintf(fp, "vni %d ", rta_getattr_u32(tb[NDA_VNI]));
 	if (tb[NDA_IFINDEX]) {
 		unsigned int ifindex = rta_getattr_u32(tb[NDA_IFINDEX]);
 
@@ -136,37 +190,95 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 			char ifname[IF_NAMESIZE];
 
 			if (!tb[NDA_LINK_NETNSID] &&
-			    if_indextoname(ifindex, ifname))
-				fprintf(fp, "via %s ", ifname);
-			else
-				fprintf(fp, "via ifindex %u ", ifindex);
+			    if_indextoname(ifindex, ifname)) {
+				if (jw_global)
+					jsonw_string_field(jw_global, "viaIf",
+							   ifname);
+				else
+					fprintf(fp, "via %s ", ifname);
+			} else {
+				if (jw_global)
+					jsonw_uint_field(jw_global, "viaIfIndex",
+							 ifindex);
+				else
+					fprintf(fp, "via ifindex %u ", ifindex);
+			}
 		}
 	}
-	if (tb[NDA_LINK_NETNSID])
-		fprintf(fp, "link-netnsid %d ",
-			rta_getattr_u32(tb[NDA_LINK_NETNSID]));
+
+	if (tb[NDA_LINK_NETNSID]) {
+		if (jw_global)
+			jsonw_uint_field(jw_global, "linkNetNsId",
+					 rta_getattr_u32(tb[NDA_LINK_NETNSID]));
+		else
+			fprintf(fp, "link-netnsid %d ",
+				rta_getattr_u32(tb[NDA_LINK_NETNSID]));
+	}
 
 	if (show_stats && tb[NDA_CACHEINFO]) {
 		struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
 		int hz = get_user_hz();
 
-		fprintf(fp, "used %d/%d ", ci->ndm_used/hz,
-		       ci->ndm_updated/hz);
+		if (jw_global) {
+			jsonw_uint_field(jw_global, "used",
+				ci->ndm_used/hz);
+			jsonw_uint_field(jw_global, "updated",
+				ci->ndm_updated/hz);
+		} else {
+			fprintf(fp, "used %d/%d ", ci->ndm_used/hz,
+					ci->ndm_updated/hz);
+		}
 	}
-	if (r->ndm_flags & NTF_SELF)
-		fprintf(fp, "self ");
-	if (tb[NDA_MASTER])
-		fprintf(fp, "master %s ",
-			ll_index_to_name(rta_getattr_u32(tb[NDA_MASTER])));
-	else if (r->ndm_flags & NTF_MASTER)
-		fprintf(fp, "master ");
-	if (r->ndm_flags & NTF_ROUTER)
-		fprintf(fp, "router ");
-	if (r->ndm_flags & NTF_EXT_LEARNED)
-		fprintf(fp, "offload ");
 
-	fprintf(fp, "%s\n", state_n2a(r->ndm_state));
-	fflush(fp);
+	if (jw_global) {
+		if (r->ndm_flags & NTF_SELF) {
+			start_json_fdb_flags_array(&fdb_flags);
+			jsonw_string(jw_global, "self");
+		}
+		if (r->ndm_flags & NTF_ROUTER) {
+			start_json_fdb_flags_array(&fdb_flags);
+			jsonw_string(jw_global, "router");
+		}
+		if (r->ndm_flags & NTF_EXT_LEARNED) {
+			start_json_fdb_flags_array(&fdb_flags);
+			jsonw_string(jw_global, "offload");
+		}
+		if (r->ndm_flags & NTF_MASTER)
+			jsonw_string(jw_global, "master");
+		if (fdb_flags)
+			jsonw_end_array(jw_global);
+
+		if (tb[NDA_MASTER])
+			jsonw_string_field(jw_global,
+					   "master",
+					   ll_index_to_name(rta_getattr_u32(tb[NDA_MASTER])));
+
+	} else {
+		if (r->ndm_flags & NTF_SELF)
+			fprintf(fp, "self ");
+		if (r->ndm_flags & NTF_ROUTER)
+			fprintf(fp, "router ");
+		if (r->ndm_flags & NTF_EXT_LEARNED)
+			fprintf(fp, "offload ");
+		if (tb[NDA_MASTER]) {
+			fprintf(fp, "master %s ",
+				ll_index_to_name(rta_getattr_u32(tb[NDA_MASTER])));
+		} else if (r->ndm_flags & NTF_MASTER) {
+			fprintf(fp, "master ");
+		}
+	}
+
+	state_s = state_n2a(r->ndm_state);
+	if (jw_global) {
+		if (state_s[0])
+			jsonw_string_field(jw_global, "state", state_s);
+
+		jsonw_end_object(jw_global);
+	} else {
+		fprintf(fp, "%s\n", state_s);
+
+		fflush(fp);
+	}
 
 	return 0;
 }
@@ -177,16 +289,15 @@ static int fdb_show(int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ifinfomsg	ifm;
 		char			buf[256];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.ifm.ifi_family = PF_BRIDGE,
+	};
 
 	char *filter_dev = NULL;
 	char *br = NULL;
 	int msg_size = sizeof(struct ifinfomsg);
 
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.ifm.ifi_family = PF_BRIDGE;
-
 	while (argc > 0) {
 		if ((strcmp(*argv, "brport") == 0) || strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();
@@ -233,10 +344,22 @@ static int fdb_show(int argc, char **argv)
 		exit(1);
 	}
 
+	if (json_output) {
+		jw_global = jsonw_new(stdout);
+		if (!jw_global) {
+			fprintf(stderr, "Error allocation json object\n");
+			exit(1);
+		}
+		jsonw_start_array(jw_global);
+	}
 	if (rtnl_dump_filter(&rth, print_fdb, stdout) < 0) {
 		fprintf(stderr, "Dump terminated\n");
 		exit(1);
 	}
+	if (jw_global) {
+		jsonw_end_array(jw_global);
+		jsonw_destroy(&jw_global);
+	}
 
 	return 0;
 }
@@ -247,7 +370,13 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ndmsg		ndm;
 		char			buf[256];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.ndm.ndm_family = PF_BRIDGE,
+		.ndm.ndm_state = NUD_NOARP,
+	};
 	char *addr = NULL;
 	char *d = NULL;
 	char abuf[ETH_ALEN];
@@ -259,14 +388,6 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv)
 	char *endptr;
 	short vid = -1;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.ndm.ndm_family = PF_BRIDGE;
-	req.ndm.ndm_state = NUD_NOARP;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();

bridge/link.c

@@ -255,7 +255,12 @@ static int brlink_modify(int argc, char **argv)
 		struct nlmsghdr  n;
 		struct ifinfomsg ifm;
 		char             buf[512];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_SETLINK,
+		.ifm.ifi_family = PF_BRIDGE,
+	};
 	char *d = NULL;
 	__s8 learning = -1;
 	__s8 learning_sync = -1;
@@ -271,13 +276,6 @@ static int brlink_modify(int argc, char **argv)
 	__u16 flags = 0;
 	struct rtattr *nest;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_SETLINK;
-	req.ifm.ifi_family = PF_BRIDGE;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();

bridge/mdb.c

@@ -234,19 +234,16 @@ static int mdb_modify(int cmd, int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct br_port_msg	bpm;
 		char			buf[1024];
-	} req;
-	struct br_mdb_entry entry;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.bpm.family = PF_BRIDGE,
+	};
+	struct br_mdb_entry entry = {};
 	char *d = NULL, *p = NULL, *grp = NULL;
 	short vid = 0;
 
-	memset(&req, 0, sizeof(req));
-	memset(&entry, 0, sizeof(entry));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.bpm.family = PF_BRIDGE;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();

bridge/vlan.c

@@ -7,6 +7,7 @@
 #include <netinet/in.h>
 #include <linux/if_bridge.h>
 #include <linux/if_ether.h>
+#include <json_writer.h>
 #include <string.h>
 
 #include "libnetlink.h"
@@ -15,6 +16,8 @@
 
 static unsigned int filter_index, filter_vlan;
 
+json_writer_t *jw_global = NULL;
+
 static void usage(void)
 {
 	fprintf(stderr, "Usage: bridge vlan { add | del } vid VLAN_ID dev DEV [ pvid] [ untagged ]\n");
@@ -29,22 +32,19 @@ static int vlan_modify(int cmd, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ifinfomsg	ifm;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = cmd,
+		.ifm.ifi_family = PF_BRIDGE,
+	};
 	char *d = NULL;
 	short vid = -1;
 	short vid_end = -1;
 	struct rtattr *afspec;
-	struct bridge_vlan_info vinfo;
+	struct bridge_vlan_info vinfo = {};
 	unsigned short flags = 0;
 
-	memset(&vinfo, 0, sizeof(vinfo));
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = cmd;
-	req.ifm.ifi_family = PF_BRIDGE;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();
@@ -158,6 +158,28 @@ static int filter_vlan_check(struct bridge_vlan_info *vinfo)
 	return 1;
 }
 
+static void print_vlan_port(FILE *fp, int ifi_index)
+{
+	if (jw_global) {
+		jsonw_pretty(jw_global, 1);
+		jsonw_name(jw_global,
+			   ll_index_to_name(ifi_index));
+		jsonw_start_array(jw_global);
+	} else {
+		fprintf(fp, "%s",
+			ll_index_to_name(ifi_index));
+	}
+}
+
+static void start_json_vlan_flags_array(bool *vlan_flags)
+{
+	if (*vlan_flags)
+		return;
+	jsonw_name(jw_global, "flags");
+	jsonw_start_array(jw_global);
+	*vlan_flags = true;
+}
+
 static int print_vlan(const struct sockaddr_nl *who,
 		      struct nlmsghdr *n,
 		      void *arg)
@@ -166,6 +188,7 @@ static int print_vlan(const struct sockaddr_nl *who,
 	struct ifinfomsg *ifm = NLMSG_DATA(n);
 	int len = n->nlmsg_len;
 	struct rtattr *tb[IFLA_MAX+1];
+	bool vlan_flags;
 
 	if (n->nlmsg_type != RTM_NEWLINK) {
 		fprintf(stderr, "Not RTM_NEWLINK: %08x %08x %08x\n",
@@ -199,7 +222,8 @@ static int print_vlan(const struct sockaddr_nl *who,
 		__u16 last_vid_start = 0;
 
 		if (!filter_vlan)
-			fprintf(fp, "%s", ll_index_to_name(ifm->ifi_index));
+			print_vlan_port(fp, ifm->ifi_index);
+
 		for (i = RTA_DATA(list); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
 			struct bridge_vlan_info *vinfo;
 			int vcheck_ret;
@@ -218,20 +242,58 @@ static int print_vlan(const struct sockaddr_nl *who,
 				continue;
 
 			if (filter_vlan)
-				fprintf(fp, "%s",
-					ll_index_to_name(ifm->ifi_index));
-			fprintf(fp, "\t %hu", last_vid_start);
-			if (last_vid_start != vinfo->vid)
-				fprintf(fp, "-%hu", vinfo->vid);
-			if (vinfo->flags & BRIDGE_VLAN_INFO_PVID)
-				fprintf(fp, " PVID");
-			if (vinfo->flags & BRIDGE_VLAN_INFO_UNTAGGED)
-				fprintf(fp, " Egress Untagged");
-			fprintf(fp, "\n");
+				print_vlan_port(fp, ifm->ifi_index);
+			if (jw_global) {
+				jsonw_start_object(jw_global);
+				jsonw_uint_field(jw_global, "vlan",
+						 last_vid_start);
+				if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN)
+					continue;
+			} else {
+				fprintf(fp, "\t %hu", last_vid_start);
+			}
+			if (last_vid_start != vinfo->vid) {
+				if (jw_global)
+					jsonw_uint_field(jw_global, "vlanEnd",
+							 vinfo->vid);
+				else
+					fprintf(fp, "-%hu", vinfo->vid);
+			}
+			if (vinfo->flags & BRIDGE_VLAN_INFO_PVID) {
+				if (jw_global) {
+					start_json_vlan_flags_array(&vlan_flags);
+					jsonw_string(jw_global, "PVID");
+				} else {
+					fprintf(fp, " PVID");
+				}
+			}
+			if (vinfo->flags & BRIDGE_VLAN_INFO_UNTAGGED) {
+				if (jw_global) {
+					start_json_vlan_flags_array(&vlan_flags);
+					jsonw_string(jw_global,
+						     "Egress Untagged");
+				} else {
+					fprintf(fp, " Egress Untagged");
+				}
+			}
+			if (vlan_flags) {
+				jsonw_end_array(jw_global);
+				vlan_flags = false;
+			}
+
+			if (jw_global)
+				jsonw_end_object(jw_global);
+			else
+				fprintf(fp, "\n");
 		}
 	}
-	if (!filter_vlan)
-		fprintf(fp, "\n");
+	if (!filter_vlan) {
+		if (jw_global)
+			jsonw_end_array(jw_global);
+		else
+			fprintf(fp, "\n");
+
+	}
 	fflush(fp);
 	return 0;
 }
@@ -271,12 +333,27 @@ static int vlan_show(int argc, char **argv)
 		exit(1);
 	}
 
-	printf("port\tvlan ids\n");
+	if (json_output) {
+		jw_global = jsonw_new(stdout);
+		if (!jw_global) {
+			fprintf(stderr, "Error allocation json object\n");
+			exit(1);
+		}
+		jsonw_start_object(jw_global);
+	} else {
+		printf("port\tvlan ids\n");
+	}
+
 	if (rtnl_dump_filter(&rth, print_vlan, stdout) < 0) {
 		fprintf(stderr, "Dump ternminated\n");
 		exit(1);
 	}
 
+	if (jw_global) {
+		jsonw_end_object(jw_global);
+		jsonw_destroy(&jw_global);
+	}
+
 	return 0;
 }
 

genl/ctrl.c

@@ -42,23 +42,19 @@ static int usage(void)
 int genl_ctrl_resolve_family(const char *family)
 {
 	struct rtnl_handle rth;
-	struct nlmsghdr *nlh;
-	struct genlmsghdr *ghdr;
 	int ret = 0;
 	struct {
 		struct nlmsghdr         n;
+		struct genlmsghdr	g;
 		char                    buf[4096];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-
-	nlh = &req.n;
-	nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
-	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-	nlh->nlmsg_type = GENL_ID_CTRL;
-
-	ghdr = NLMSG_DATA(&req.n);
-	ghdr->cmd = CTRL_CMD_GETFAMILY;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN),
+		.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+		.n.nlmsg_type = GENL_ID_CTRL,
+		.g.cmd = CTRL_CMD_GETFAMILY,
+	};
+	struct nlmsghdr *nlh = &req.n;
+	struct genlmsghdr *ghdr = &req.g;
 
 	if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
 		fprintf(stderr, "Cannot open generic netlink socket\n");
@@ -74,7 +70,6 @@ int genl_ctrl_resolve_family(const char *family)
 
 	{
 		struct rtattr *tb[CTRL_ATTR_MAX + 1];
-		struct genlmsghdr *ghdr = NLMSG_DATA(nlh);
 		int len = nlh->nlmsg_len;
 		struct rtattr *attrs;
 
@@ -291,24 +286,19 @@ static int print_ctrl2(const struct sockaddr_nl *who,
 static int ctrl_list(int cmd, int argc, char **argv)
 {
 	struct rtnl_handle rth;
-	struct nlmsghdr *nlh;
-	struct genlmsghdr *ghdr;
 	int ret = -1;
 	char d[GENL_NAMSIZ];
 	struct {
 		struct nlmsghdr         n;
+		struct genlmsghdr	g;
 		char                    buf[4096];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-
-	nlh = &req.n;
-	nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
-	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-	nlh->nlmsg_type = GENL_ID_CTRL;
-
-	ghdr = NLMSG_DATA(&req.n);
-	ghdr->cmd = CTRL_CMD_GETFAMILY;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN),
+		.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+		.n.nlmsg_type = GENL_ID_CTRL,
+		.g.cmd = CTRL_CMD_GETFAMILY,
+	};
+	struct nlmsghdr *nlh = &req.n;
 
 	if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
 		fprintf(stderr, "Cannot open generic netlink socket\n");

genl/genl.c

@@ -86,9 +86,8 @@ reg:
 	return f;
 
 noexist:
-	f = malloc(sizeof(*f));
+	f = calloc(1, sizeof(*f));
 	if (f) {
-		memset(f, 0, sizeof(*f));
 		strncpy(f->name, str, 15);
 		f->parse_genlopt = parse_nofopt;
 		f->print_genlopt = print_nofopt;

ip/ip6tunnel.c

@@ -135,9 +135,7 @@ static void print_tunnel(struct ip6_tnl_parm2 *p)
 static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm2 *p)
 {
 	int count = 0;
-	char medium[IFNAMSIZ];
-
-	memset(medium, 0, sizeof(medium));
+	char medium[IFNAMSIZ] = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "mode") == 0) {
@@ -276,9 +274,8 @@ static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm2 *p)
 				duparg2("name", *argv);
 			strncpy(p->name, *argv, IFNAMSIZ - 1);
 			if (cmd == SIOCCHGTUNNEL && count == 0) {
-				struct ip6_tnl_parm2 old_p;
+				struct ip6_tnl_parm2 old_p = {};
 
-				memset(&old_p, 0, sizeof(old_p));
 				if (tnl_get_ioctl(*argv, &old_p))
 					return -1;
 				*p = old_p;
@@ -351,7 +348,7 @@ static int do_tunnels_list(struct ip6_tnl_parm2 *p)
 	while (fgets(buf, sizeof(buf), fp) != NULL) {
 		char name[IFNAMSIZ];
 		int index, type;
-		struct ip6_tnl_parm2 p1;
+		struct ip6_tnl_parm2 p1 = {};
 		char *ptr;
 
 		buf[sizeof(buf) - 1] = '\0';
@@ -372,7 +369,6 @@ static int do_tunnels_list(struct ip6_tnl_parm2 *p)
 		}
 		if (type != ARPHRD_TUNNEL6 && type != ARPHRD_IP6GRE)
 			continue;
-		memset(&p1, 0, sizeof(p1));
 		ip6_tnl_parm_init(&p1, 0);
 		if (type == ARPHRD_IP6GRE)
 			p1.proto = IPPROTO_GRE;

ip/ipaddress.c

@@ -173,13 +173,12 @@ static void print_queuelen(FILE *f, struct rtattr *tb[IFLA_MAX + 1])
 	if (tb[IFLA_TXQLEN])
 		qlen = *(int *)RTA_DATA(tb[IFLA_TXQLEN]);
 	else {
-		struct ifreq ifr;
+		struct ifreq ifr = {};
 		int s = socket(AF_INET, SOCK_STREAM, 0);
 
 		if (s < 0)
 			return;
 
-		memset(&ifr, 0, sizeof(ifr));
 		strcpy(ifr.ifr_name, rta_getattr_str(tb[IFLA_IFNAME]));
 		if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
 			fprintf(f, "ioctl(SIOCGIFTXQLEN) failed: %s\n", strerror(errno));
@@ -450,7 +449,7 @@ static void print_num(FILE *fp, unsigned int width, uint64_t count)
 
 static void print_vf_stats64(FILE *fp, struct rtattr *vfstats)
 {
-	struct rtattr *vf[IFLA_VF_STATS_MAX + 1] = {};
+	struct rtattr *vf[IFLA_VF_STATS_MAX + 1];
 
 	if (vfstats->rta_type != IFLA_VF_STATS) {
 		fprintf(stderr, "BUG: rta type is %d\n", vfstats->rta_type);
@@ -1037,10 +1036,8 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 	}
 	if (filter.pfx.family) {
 		if (rta_tb[IFA_LOCAL]) {
-			inet_prefix dst;
+			inet_prefix dst = { .family = ifa->ifa_family };
 
-			memset(&dst, 0, sizeof(dst));
-			dst.family = ifa->ifa_family;
 			memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 			if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 				return 0;
@@ -1396,10 +1393,10 @@ static void ipaddr_filter(struct nlmsg_chain *linfo, struct nlmsg_chain *ainfo)
 					tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 
 				if (filter.pfx.family && tb[IFA_LOCAL]) {
-					inet_prefix dst;
+					inet_prefix dst = {
+						.family = ifa->ifa_family
+					};
 
-					memset(&dst, 0, sizeof(dst));
-					dst.family = ifa->ifa_family;
 					memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 					if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 						continue;
@@ -1845,7 +1842,12 @@ static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ifaddrmsg	ifa;
 		char			buf[256];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.ifa.ifa_family = preferred_family,
+	};
 	char  *d = NULL;
 	char  *l = NULL;
 	char  *lcl_arg = NULL;
@@ -1860,16 +1862,8 @@ static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
 	int scoped = 0;
 	__u32 preferred_lft = INFINITY_LIFE_TIME;
 	__u32 valid_lft = INFINITY_LIFE_TIME;
-	struct ifa_cacheinfo cinfo;
 	unsigned int ifa_flags = 0;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST | flags;
-	req.n.nlmsg_type = cmd;
-	req.ifa.ifa_family = preferred_family;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "peer") == 0 ||
 		    strcmp(*argv, "remote") == 0) {
@@ -2026,6 +2020,8 @@ static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
 	}
 
 	if (valid_lftp || preferred_lftp) {
+		struct ifa_cacheinfo cinfo = {};
+
 		if (!valid_lft) {
 			fprintf(stderr, "valid_lft is zero\n");
 			return -1;
@@ -2035,7 +2031,6 @@ static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
 			return -1;
 		}
 
-		memset(&cinfo, 0, sizeof(cinfo));
 		cinfo.ifa_prefered = preferred_lft;
 		cinfo.ifa_valid = valid_lft;
 		addattr_l(&req.n, sizeof(req), IFA_CACHEINFO, &cinfo,

ip/ipaddrlabel.c

@@ -127,23 +127,18 @@ static int ipaddrlabel_modify(int cmd, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ifaddrlblmsg	ifal;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_type = cmd,
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrlblmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.ifal.ifal_family = preferred_family,
+	};
 
-	inet_prefix prefix;
+	inet_prefix prefix = {};
 	uint32_t label = 0xffffffffUL;
 	char *p = NULL;
 	char *l = NULL;
 
-	memset(&req, 0, sizeof(req));
-	memset(&prefix, 0, sizeof(prefix));
-
-	req.n.nlmsg_type = cmd;
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrlblmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.ifal.ifal_family = preferred_family;
-	req.ifal.ifal_prefixlen = 0;
-	req.ifal.ifal_index = 0;
-
 	if (cmd == RTM_NEWADDRLABEL) {
 		req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
 	}

ip/iplink.c

@@ -55,7 +55,9 @@ void iplink_usage(void)
 		fprintf(stderr, "                   type TYPE [ ARGS ]\n");
 		fprintf(stderr, "       ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n");
 		fprintf(stderr, "\n");
-		fprintf(stderr, "       ip link set { DEVICE | dev DEVICE | group DEVGROUP } [ { up | down } ]\n");
+		fprintf(stderr, "       ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n");
+		fprintf(stderr, "	                  [ { up | down } ]\n");
+		fprintf(stderr, "	                  [ type TYPE ARGS ]\n");
 	} else
 		fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n");
 
@@ -206,16 +208,14 @@ static int iplink_have_newlink(void)
 		struct nlmsghdr		n;
 		struct ifinfomsg	i;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
+		.n.nlmsg_type = RTM_NEWLINK,
+		.i.ifi_family = AF_UNSPEC,
+	};
 
 	if (have_rtnl_newlink < 0) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-		req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
-		req.n.nlmsg_type = RTM_NEWLINK;
-		req.i.ifi_family = AF_UNSPEC;
-
 		if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
 			perror("request send failed");
 			exit(1);
@@ -781,16 +781,14 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
 	int index = -1;
 	int group;
 	struct link_util *lu = NULL;
-	struct iplink_req req;
+	struct iplink_req req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.i.ifi_family = preferred_family,
+	};
 	int ret;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.i.ifi_family = preferred_family;
-
 	ret = iplink_parse(argc, argv,
 			   &req, &name, &type, &link, &dev, &group, &index);
 	if (ret < 0)
@@ -923,19 +921,17 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
 int iplink_get(unsigned int flags, char *name, __u32 filt_mask)
 {
 	int len;
-	struct iplink_req req;
+	struct iplink_req req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+	};
 	struct {
 		struct nlmsghdr n;
 		char buf[16384];
 	} answer;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = RTM_GETLINK;
-	req.i.ifi_family = preferred_family;
-
 	if (name) {
 		len = strlen(name) + 1;
 		if (len == 1)
@@ -1029,16 +1025,14 @@ static int do_changename(const char *dev, const char *newdev)
 
 static int set_qlen(const char *dev, int qlen)
 {
-	struct ifreq ifr;
+	struct ifreq ifr = { .ifr_qlen = qlen };
 	int s;
 
 	s = get_ctl_fd();
 	if (s < 0)
 		return -1;
 
-	memset(&ifr, 0, sizeof(ifr));
 	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
-	ifr.ifr_qlen = qlen;
 	if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
 		perror("SIOCSIFXQLEN");
 		close(s);
@@ -1051,16 +1045,14 @@ static int set_qlen(const char *dev, int qlen)
 
 static int set_mtu(const char *dev, int mtu)
 {
-	struct ifreq ifr;
+	struct ifreq ifr = { .ifr_mtu = mtu };
 	int s;
 
 	s = get_ctl_fd();
 	if (s < 0)
 		return -1;
 
-	memset(&ifr, 0, sizeof(ifr));
 	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
-	ifr.ifr_mtu = mtu;
 	if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
 		perror("SIOCSIFMTU");
 		close(s);
@@ -1073,8 +1065,11 @@ static int set_mtu(const char *dev, int mtu)
 
 static int get_address(const char *dev, int *htype)
 {
-	struct ifreq ifr;
-	struct sockaddr_ll me;
+	struct ifreq ifr = {};
+	struct sockaddr_ll me = {
+		.sll_family = AF_PACKET,
+		.sll_protocol = htons(ETH_P_LOOP),
+	};
 	socklen_t alen;
 	int s;
 
@@ -1084,7 +1079,6 @@ static int get_address(const char *dev, int *htype)
 		return -1;
 	}
 
-	memset(&ifr, 0, sizeof(ifr));
 	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
 	if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
 		perror("SIOCGIFINDEX");
@@ -1092,10 +1086,7 @@ static int get_address(const char *dev, int *htype)
 		return -1;
 	}
 
-	memset(&me, 0, sizeof(me));
-	me.sll_family = AF_PACKET;
 	me.sll_ifindex = ifr.ifr_ifindex;
-	me.sll_protocol = htons(ETH_P_LOOP);
 	if (bind(s, (struct sockaddr *)&me, sizeof(me)) == -1) {
 		perror("bind");
 		close(s);

ip/iplink_bond_slave.c

@@ -17,6 +17,16 @@
 #include "utils.h"
 #include "ip_common.h"
 
+static void print_explain(FILE *f)
+{
+	fprintf(f, "Usage: ... bond_slave [ queue_id ID ]\n");
+}
+
+static void explain(void)
+{
+	print_explain(stderr);
+}
+
 static const char *slave_states[] = {
 	[BOND_STATE_ACTIVE] = "ACTIVE",
 	[BOND_STATE_BACKUP] = "BACKUP",
@@ -99,6 +109,13 @@ static int bond_slave_parse_opt(struct link_util *lu, int argc, char **argv,
 			if (get_u16(&queue_id, *argv, 0))
 				invarg("queue_id is invalid", *argv);
 			addattr16(n, 1024, IFLA_BOND_SLAVE_QUEUE_ID, queue_id);
+		} else {
+			if (matches(*argv, "help") != 0)
+				fprintf(stderr,
+					"bond_slave: unknown option \"%s\"?\n",
+					*argv);
+			explain();
+			return -1;
 		}
 		argc--, argv++;
 	}
@@ -106,10 +123,17 @@ static int bond_slave_parse_opt(struct link_util *lu, int argc, char **argv,
 	return 0;
 }
 
+static void bond_slave_print_help(struct link_util *lu, int argc, char **argv,
+				  FILE *f)
+{
+	print_explain(f);
+}
+
 struct link_util bond_slave_link_util = {
 	.id		= "bond",
 	.maxattr	= IFLA_BOND_SLAVE_MAX,
 	.print_opt	= bond_slave_print_opt,
 	.parse_opt	= bond_slave_parse_opt,
+	.print_help	= bond_slave_print_help,
 	.slave		= true,
 };

ip/iplink_can.c

@@ -110,11 +110,9 @@ static void print_ctrlmode(FILE *f, __u32 cm)
 static int can_parse_opt(struct link_util *lu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
-	struct can_bittiming bt, dbt;
+	struct can_bittiming bt = {}, dbt = {};
 	struct can_ctrlmode cm = {0, 0};
 
-	memset(&bt, 0, sizeof(bt));
-	memset(&dbt, 0, sizeof(dbt));
 	while (argc > 0) {
 		if (matches(*argv, "bitrate") == 0) {
 			NEXT_ARG();

ip/ipmaddr.c

@@ -93,18 +93,15 @@ static void read_dev_mcast(struct ma_info **result_p)
 
 	while (fgets(buf, sizeof(buf), fp)) {
 		char hexa[256];
-		struct ma_info m;
+		struct ma_info m = { .addr.family = AF_PACKET };
 		int len;
 		int st;
 
-		memset(&m, 0, sizeof(m));
 		sscanf(buf, "%d%s%d%d%s", &m.index, m.name, &m.users, &st,
 		       hexa);
 		if (filter.dev && strcmp(filter.dev, m.name))
 			continue;
 
-		m.addr.family = AF_PACKET;
-
 		len = parse_hex(hexa, (unsigned char *)&m.addr.data, sizeof(m.addr.data));
 		if (len >= 0) {
 			struct ma_info *ma = malloc(sizeof(m));
@@ -122,22 +119,21 @@ static void read_dev_mcast(struct ma_info **result_p)
 
 static void read_igmp(struct ma_info **result_p)
 {
-	struct ma_info m;
+	struct ma_info m = {
+		.addr.family = AF_INET,
+		.addr.bitlen = 32,
+		.addr.bytelen = 4,
+	};
 	char buf[256];
 	FILE *fp = fopen("/proc/net/igmp", "r");
 
 	if (!fp)
 		return;
-	memset(&m, 0, sizeof(m));
 	if (!fgets(buf, sizeof(buf), fp)) {
 		fclose(fp);
 		return;
 	}
 
-	m.addr.family = AF_INET;
-	m.addr.bitlen = 32;
-	m.addr.bytelen = 4;
-
 	while (fgets(buf, sizeof(buf), fp)) {
 		struct ma_info *ma;
 
@@ -169,17 +165,14 @@ static void read_igmp6(struct ma_info **result_p)
 
 	while (fgets(buf, sizeof(buf), fp)) {
 		char hexa[256];
-		struct ma_info m;
+		struct ma_info m = { .addr.family = AF_INET6 };
 		int len;
 
-		memset(&m, 0, sizeof(m));
 		sscanf(buf, "%d%s%s%d", &m.index, m.name, hexa, &m.users);
 
 		if (filter.dev && strcmp(filter.dev, m.name))
 			continue;
 
-		m.addr.family = AF_INET6;
-
 		len = parse_hex(hexa, (unsigned char *)&m.addr.data, sizeof(m.addr.data));
 		if (len >= 0) {
 			struct ma_info *ma = malloc(sizeof(m));
@@ -274,11 +267,9 @@ static int multiaddr_list(int argc, char **argv)
 
 static int multiaddr_modify(int cmd, int argc, char **argv)
 {
-	struct ifreq ifr;
+	struct ifreq ifr = {};
 	int fd;
 
-	memset(&ifr, 0, sizeof(ifr));
-
 	if (cmd == RTM_NEWADDR)
 		cmd = SIOCADDMULTI;
 	else

ip/ipmroute.c

@@ -97,20 +97,16 @@ int print_mroute(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 		return 0;
 
 	if (tb[RTA_DST] && filter.mdst.bitlen > 0) {
-		inet_prefix dst;
+		inet_prefix dst = { .family = r->rtm_family };
 
-		memset(&dst, 0, sizeof(dst));
-		dst.family = r->rtm_family;
 		memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), RTA_PAYLOAD(tb[RTA_DST]));
 		if (inet_addr_match(&dst, &filter.mdst, filter.mdst.bitlen))
 			return 0;
 	}
 
 	if (tb[RTA_SRC] && filter.msrc.bitlen > 0) {
-		inet_prefix src;
+		inet_prefix src = { .family = r->rtm_family };
 
-		memset(&src, 0, sizeof(src));
-		src.family = r->rtm_family;
 		memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), RTA_PAYLOAD(tb[RTA_SRC]));
 		if (inet_addr_match(&src, &filter.msrc, filter.msrc.bitlen))
 			return 0;

ip/ipneigh.c

@@ -101,7 +101,13 @@ static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ndmsg		ndm;
 		char			buf[256];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.ndm.ndm_family = preferred_family,
+		.ndm.ndm_state = NUD_PERMANENT,
+	};
 	char  *dev = NULL;
 	int dst_ok = 0;
 	int dev_ok = 0;
@@ -109,14 +115,6 @@ static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
 	char *lla = NULL;
 	inet_prefix dst;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.ndm.ndm_family = preferred_family;
-	req.ndm.ndm_state = NUD_PERMANENT;
-
 	while (argc > 0) {
 		if (matches(*argv, "lladdr") == 0) {
 			NEXT_ARG();
@@ -239,10 +237,8 @@ int print_neigh(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 
 	if (tb[NDA_DST]) {
 		if (filter.pfx.family) {
-			inet_prefix dst;
+			inet_prefix dst = { .family = r->ndm_family };
 
-			memset(&dst, 0, sizeof(dst));
-			dst.family = r->ndm_family;
 			memcpy(&dst.data, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST]));
 			if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 				return 0;
@@ -348,15 +344,13 @@ static int do_show_or_flush(int argc, char **argv, int flush)
 		struct nlmsghdr	n;
 		struct ndmsg		ndm;
 		char			buf[256];
-	} req;
+	} req = {
+		.n.nlmsg_type = RTM_GETNEIGH,
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+	};
 	char *filter_dev = NULL;
 	int state_given = 0;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_type = RTM_GETNEIGH;
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
-
 	ipneigh_reset_filter(0);
 
 	if (!filter.family)

ip/ipnetconf.c

@@ -154,7 +154,11 @@ static int do_show(int argc, char **argv)
 		struct nlmsghdr		n;
 		struct netconfmsg	ncm;
 		char			buf[1024];
-	} req;
+	} 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;
@@ -176,10 +180,6 @@ static int do_show(int argc, char **argv)
 
 	ll_init_map(&rth);
 	if (filter.ifindex) {
-		memset(&req, 0, sizeof(req));
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct netconfmsg));
-		req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
-		req.n.nlmsg_type = RTM_GETNETCONF;
 		req.ncm.ncm_family = filter.family;
 		if (filter.ifindex)
 			addattr_l(&req.n, sizeof(req), NETCONFA_IFINDEX,

ip/ipnetns.c

@@ -61,16 +61,15 @@ static int ipnetns_have_nsid(void)
 		struct nlmsghdr n;
 		struct rtgenmsg g;
 		char            buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETNSID,
+		.g.rtgen_family = AF_UNSPEC,
+	};
 	int fd;
 
 	if (have_rtnl_getnsid < 0) {
-		memset(&req, 0, sizeof(req));
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETNSID;
-		req.g.rtgen_family = AF_UNSPEC;
-
 		fd = open("/proc/self/ns/net", O_RDONLY);
 		if (fd < 0) {
 			perror("open(\"/proc/self/ns/net\")");
@@ -96,17 +95,16 @@ static int get_netnsid_from_name(const char *name)
 		struct nlmsghdr n;
 		struct rtgenmsg g;
 		char            buf[1024];
-	} req, answer;
+	} answer, req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETNSID,
+		.g.rtgen_family = AF_UNSPEC,
+	};
 	struct rtattr *tb[NETNSA_MAX + 1];
 	struct rtgenmsg *rthdr;
 	int len, fd;
 
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_GETNSID;
-	req.g.rtgen_family = AF_UNSPEC;
-
 	fd = netns_get_fd(name);
 	if (fd < 0)
 		return fd;
@@ -685,15 +683,14 @@ static int set_netnsid_from_name(const char *name, int nsid)
 		struct nlmsghdr n;
 		struct rtgenmsg g;
 		char            buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_NEWNSID,
+		.g.rtgen_family = AF_UNSPEC,
+	};
 	int fd, err = 0;
 
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_NEWNSID;
-	req.g.rtgen_family = AF_UNSPEC;
-
 	fd = netns_get_fd(name);
 	if (fd < 0)
 		return fd;

ip/ipntable.c

@@ -66,26 +66,19 @@ static int ipntable_modify(int cmd, int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct ndtmsg		ndtm;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.ndtm.ndtm_family = preferred_family,
+	};
 	char *namep = NULL;
 	char *threshsp = NULL;
 	char *gc_intp = NULL;
-	char parms_buf[1024];
+	char parms_buf[1024] = {};
 	struct rtattr *parms_rta = (struct rtattr *)parms_buf;
 	int parms_change = 0;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-
-	req.ndtm.ndtm_family = preferred_family;
-	req.ndtm.ndtm_pad1 = 0;
-	req.ndtm.ndtm_pad2 = 0;
-
-	memset(&parms_buf, 0, sizeof(parms_buf));
-
 	parms_rta->rta_type = NDTA_PARMS;
 	parms_rta->rta_len = RTA_LENGTH(0);
 
@@ -322,15 +315,13 @@ static int ipntable_modify(int cmd, int flags, int argc, char **argv)
 static const char *ntable_strtime_delta(__u32 msec)
 {
 	static char str[32];
-	struct timeval now;
+	struct timeval now = {};
 	time_t t;
 	struct tm *tp;
 
 	if (msec == 0)
 		goto error;
 
-	memset(&now, 0, sizeof(now));
-
 	if (gettimeofday(&now, NULL) < 0) {
 		perror("gettimeofday");
 		goto error;

ip/iproute.c

@@ -140,10 +140,10 @@ static int flush_update(void)
 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
 {
 	struct rtmsg *r = NLMSG_DATA(n);
-	inet_prefix dst;
-	inet_prefix src;
-	inet_prefix via;
-	inet_prefix prefsrc;
+	inet_prefix dst = { .family = r->rtm_family };
+	inet_prefix src = { .family = r->rtm_family };
+	inet_prefix via = { .family = r->rtm_family };
+	inet_prefix prefsrc = { .family = r->rtm_family };
 	__u32 table;
 	static int ip6_multiple_tables;
 
@@ -211,19 +211,13 @@ static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
 	if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
 		return 0;
 
-	memset(&dst, 0, sizeof(dst));
-	dst.family = r->rtm_family;
 	if (tb[RTA_DST])
 		memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
 	if (filter.rsrc.family || filter.msrc.family) {
-		memset(&src, 0, sizeof(src));
-		src.family = r->rtm_family;
 		if (tb[RTA_SRC])
 			memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
 	}
 	if (filter.rvia.bitlen > 0) {
-		memset(&via, 0, sizeof(via));
-		via.family = r->rtm_family;
 		if (tb[RTA_GATEWAY])
 			memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
 		if (tb[RTA_VIA]) {
@@ -235,8 +229,6 @@ static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
 		}
 	}
 	if (filter.rprefsrc.bitlen > 0) {
-		memset(&prefsrc, 0, sizeof(prefsrc));
-		prefsrc.family = r->rtm_family;
 		if (tb[RTA_PREFSRC])
 			memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
 	}
@@ -829,7 +821,14 @@ static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct rtmsg		r;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.r.rtm_family = preferred_family,
+		.r.rtm_table = RT_TABLE_MAIN,
+		.r.rtm_scope = RT_SCOPE_NOWHERE,
+	};
 	char  mxbuf[256];
 	struct rtattr *mxrta = (void *)mxbuf;
 	unsigned int mxlock = 0;
@@ -842,15 +841,6 @@ static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
 	int raw = 0;
 	int type_ok = 0;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.r.rtm_family = preferred_family;
-	req.r.rtm_table = RT_TABLE_MAIN;
-	req.r.rtm_scope = RT_SCOPE_NOWHERE;
-
 	if (cmd != RTM_DELROUTE) {
 		req.r.rtm_protocol = RTPROT_BOOT;
 		req.r.rtm_scope = RT_SCOPE_UNIVERSE;
@@ -1277,20 +1267,15 @@ static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
 	struct {
 		struct nlmsghdr nlh;
 		struct rtmsg rtm;
-	} req;
-	struct sockaddr_nl nladdr;
-
-	memset(&nladdr, 0, sizeof(nladdr));
-	memset(&req, 0, sizeof(req));
-	nladdr.nl_family = AF_NETLINK;
-
-	req.nlh.nlmsg_len = sizeof(req);
-	req.nlh.nlmsg_type = RTM_GETROUTE;
-	req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
-	req.nlh.nlmsg_pid = 0;
-	req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
-	req.rtm.rtm_family = family;
-	req.rtm.rtm_flags |= RTM_F_CLONED;
+	} req = {
+		.nlh.nlmsg_len = sizeof(req),
+		.nlh.nlmsg_type = RTM_GETROUTE,
+		.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = rth->dump = ++rth->seq,
+		.rtm.rtm_family = family,
+		.rtm.rtm_flags = RTM_F_CLONED,
+	};
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 
 	return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
 }
@@ -1641,30 +1626,21 @@ static int iproute_get(int argc, char **argv)
 		struct nlmsghdr	n;
 		struct rtmsg		r;
 		char			buf[1024];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETROUTE,
+		.r.rtm_family = preferred_family,
+	};
 	char  *idev = NULL;
 	char  *odev = NULL;
 	int connected = 0;
 	int from_ok = 0;
 	unsigned int mark = 0;
 
-	memset(&req, 0, sizeof(req));
-
 	iproute_reset_filter(0);
 	filter.cloned = 2;
 
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_GETROUTE;
-	req.r.rtm_family = preferred_family;
-	req.r.rtm_table = 0;
-	req.r.rtm_protocol = 0;
-	req.r.rtm_scope = 0;
-	req.r.rtm_type = 0;
-	req.r.rtm_src_len = 0;
-	req.r.rtm_dst_len = 0;
-	req.r.rtm_tos = 0;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "tos") == 0 ||
 		    matches(*argv, "dsfield") == 0) {

ip/iprule.c

@@ -331,19 +331,15 @@ static int iprule_modify(int cmd, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct rtmsg		r;
 		char			buf[1024];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_type = cmd;
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.r.rtm_family = preferred_family;
-	req.r.rtm_protocol = RTPROT_BOOT;
-	req.r.rtm_scope = RT_SCOPE_UNIVERSE;
-	req.r.rtm_table = 0;
-	req.r.rtm_type = RTN_UNSPEC;
-	req.r.rtm_flags = 0;
+	} req = {
+		.n.nlmsg_type = cmd,
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.r.rtm_family = preferred_family,
+		.r.rtm_protocol = RTPROT_BOOT,
+		.r.rtm_scope = RT_SCOPE_UNIVERSE,
+		.r.rtm_type = RTN_UNSPEC,
+	};
 
 	if (cmd == RTM_NEWRULE) {
 		req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;

ip/iptoken.c

@@ -89,10 +89,7 @@ static int print_token(const struct sockaddr_nl *who, struct nlmsghdr *n, void *
 static int iptoken_list(int argc, char **argv)
 {
 	int af = AF_INET6;
-	struct rtnl_dump_args da;
-
-	memset(&da, 0, sizeof(da));
-	da.fp = stdout;
+	struct rtnl_dump_args da = { .fp = stdout };
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
@@ -123,18 +120,16 @@ static int iptoken_set(int argc, char **argv, bool delete)
 		struct nlmsghdr n;
 		struct ifinfomsg ifi;
 		char buf[512];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_SETLINK,
+		.ifi.ifi_family = AF_INET6,
+	};
 	struct rtattr *afs, *afs6;
 	bool have_token = delete, have_dev = false;
 	inet_prefix addr = { .bytelen = 16, };
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_SETLINK;
-	req.ifi.ifi_family = AF_INET6;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();

ip/iptunnel.c

@@ -60,12 +60,10 @@ static void set_tunnel_proto(struct ip_tunnel_parm *p, int proto)
 static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
 {
 	int count = 0;
-	char medium[IFNAMSIZ];
+	char medium[IFNAMSIZ] = {};
 	int isatap = 0;
 
 	memset(p, 0, sizeof(*p));
-	memset(&medium, 0, sizeof(medium));
-
 	p->iph.version = 4;
 	p->iph.ihl = 5;
 #ifndef IP_DF
@@ -182,9 +180,8 @@ static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
 				duparg2("name", *argv);
 			strncpy(p->name, *argv, IFNAMSIZ - 1);
 			if (cmd == SIOCCHGTUNNEL && count == 0) {
-				struct ip_tunnel_parm old_p;
+				struct ip_tunnel_parm old_p = {};
 
-				memset(&old_p, 0, sizeof(old_p));
 				if (tnl_get_ioctl(*argv, &old_p))
 					return -1;
 				*p = old_p;
@@ -296,12 +293,10 @@ static int do_del(int argc, char **argv)
 
 static void print_tunnel(struct ip_tunnel_parm *p)
 {
-	struct ip_tunnel_6rd ip6rd;
+	struct ip_tunnel_6rd ip6rd = {};
 	char s1[1024];
 	char s2[1024];
 
-	memset(&ip6rd, 0, sizeof(ip6rd));
-
 	/* Do not use format_host() for local addr,
 	 * symbolic name will not be useful.
 	 */
@@ -312,10 +307,9 @@ static void print_tunnel(struct ip_tunnel_parm *p)
 	       p->iph.saddr ? rt_addr_n2a_r(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
 
 	if (p->iph.protocol == IPPROTO_IPV6 && (p->i_flags & SIT_ISATAP)) {
-		struct ip_tunnel_prl prl[16];
+		struct ip_tunnel_prl prl[16] = {};
 		int i;
 
-		memset(prl, 0, sizeof(prl));
 		prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
 		prl[0].addr = htonl(INADDR_ANY);
 
@@ -405,7 +399,7 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
 	while (fgets(buf, sizeof(buf), fp) != NULL) {
 		char name[IFNAMSIZ];
 		int index, type;
-		struct ip_tunnel_parm p1;
+		struct ip_tunnel_parm p1 = {};
 		char *ptr;
 
 		buf[sizeof(buf) - 1] = 0;
@@ -427,7 +421,6 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
 		}
 		if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
 			continue;
-		memset(&p1, 0, sizeof(p1));
 		if (tnl_get_ioctl(name, &p1))
 			continue;
 		if ((p->link && p1.link != p->link) ||
@@ -470,14 +463,11 @@ static int do_show(int argc, char **argv)
 
 static int do_prl(int argc, char **argv)
 {
-	struct ip_tunnel_prl p;
+	struct ip_tunnel_prl p = {};
 	int count = 0;
 	int devname = 0;
 	int cmd = 0;
-	char medium[IFNAMSIZ];
-
-	memset(&p, 0, sizeof(p));
-	memset(&medium, 0, sizeof(medium));
+	char medium[IFNAMSIZ] = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "prl-default") == 0) {
@@ -522,15 +512,12 @@ static int do_prl(int argc, char **argv)
 
 static int do_6rd(int argc, char **argv)
 {
-	struct ip_tunnel_6rd ip6rd;
+	struct ip_tunnel_6rd ip6rd = {};
 	int devname = 0;
 	int cmd = 0;
-	char medium[IFNAMSIZ];
+	char medium[IFNAMSIZ] = {};
 	inet_prefix prefix;
 
-	memset(&ip6rd, 0, sizeof(ip6rd));
-	memset(&medium, 0, sizeof(medium));
-
 	while (argc > 0) {
 		if (strcmp(*argv, "6rd-prefix") == 0) {
 			NEXT_ARG();

ip/ipxfrm.c

@@ -867,9 +867,7 @@ void xfrm_xfrma_print(struct rtattr *tb[], __u16 family,
 
 static int xfrm_selector_iszero(struct xfrm_selector *s)
 {
-	struct xfrm_selector s0;
-
-	memset(&s0, 0, sizeof(s0));
+	struct xfrm_selector s0 = {};
 
 	return (memcmp(&s0, s, sizeof(s0)) == 0);
 }
@@ -878,11 +876,9 @@ void xfrm_state_info_print(struct xfrm_usersa_info *xsinfo,
 			    struct rtattr *tb[], FILE *fp, const char *prefix,
 			    const char *title)
 {
-	char buf[STRBUF_SIZE];
+	char buf[STRBUF_SIZE] = {};
 	int force_spi = xfrm_xfrmproto_is_ipsec(xsinfo->id.proto);
 
-	memset(buf, '\0', sizeof(buf));
-
 	xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
 			   xsinfo->reqid, xsinfo->family, force_spi, fp,
 			   prefix, title);
@@ -959,9 +955,7 @@ void xfrm_policy_info_print(struct xfrm_userpolicy_info *xpinfo,
 			    struct rtattr *tb[], FILE *fp, const char *prefix,
 			    const char *title)
 {
-	char buf[STRBUF_SIZE];
-
-	memset(buf, '\0', sizeof(buf));
+	char buf[STRBUF_SIZE] = {};
 
 	xfrm_selector_print(&xpinfo->sel, preferred_family, fp, title);
 
@@ -1062,11 +1056,8 @@ int xfrm_id_parse(xfrm_address_t *saddr, struct xfrm_id *id, __u16 *family,
 {
 	int argc = *argcp;
 	char **argv = *argvp;
-	inet_prefix dst;
-	inet_prefix src;
-
-	memset(&dst, 0, sizeof(dst));
-	memset(&src, 0, sizeof(src));
+	inet_prefix dst = {};
+	inet_prefix src = {};
 
 	while (1) {
 		if (strcmp(*argv, "src") == 0) {
@@ -1371,13 +1362,10 @@ int xfrm_selector_parse(struct xfrm_selector *sel, int *argcp, char ***argvp)
 {
 	int argc = *argcp;
 	char **argv = *argvp;
-	inet_prefix dst;
-	inet_prefix src;
+	inet_prefix dst = {};
+	inet_prefix src = {};
 	char *upspecp = NULL;
 
-	memset(&dst, 0, sizeof(dst));
-	memset(&src, 0, sizeof(src));
-
 	while (1) {
 		if (strcmp(*argv, "src") == 0) {
 			NEXT_ARG();

ip/link_gre.c

@@ -50,12 +50,18 @@ static void usage(void)
 static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[16384];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
@@ -77,14 +83,6 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 	__u8 metadata = 0;
 
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/link_gre6.c

@@ -60,12 +60,18 @@ static void usage(void)
 static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[1024];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
@@ -83,14 +89,6 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 	int len;
 
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/link_ip6tnl.c

@@ -58,18 +58,24 @@ static void usage(void)
 static int ip6tunnel_parse_opt(struct link_util *lu, int argc, char **argv,
 			       struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[2048];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
 	int len;
-	struct in6_addr laddr;
-	struct in6_addr raddr;
+	struct in6_addr laddr = {};
+	struct in6_addr raddr = {};
 	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
 	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
 	__u32 flowinfo = 0;
@@ -77,18 +83,7 @@ static int ip6tunnel_parse_opt(struct link_util *lu, int argc, char **argv,
 	__u32 link = 0;
 	__u8 proto = 0;
 
-	memset(&laddr, 0, sizeof(laddr));
-	memset(&raddr, 0, sizeof(raddr));
-
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/link_iptnl.c

@@ -53,12 +53,18 @@ static void usage(int sit)
 static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
 			      struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[2048];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
@@ -71,7 +77,7 @@ static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
 	__u8 pmtudisc = 1;
 	__u16 iflags = 0;
 	__u8 proto = 0;
-	struct in6_addr ip6rdprefix;
+	struct in6_addr ip6rdprefix = {};
 	__u16 ip6rdprefixlen = 0;
 	__u32 ip6rdrelayprefix = 0;
 	__u16 ip6rdrelayprefixlen = 0;
@@ -80,17 +86,7 @@ static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
 	__u16 encapsport = 0;
 	__u16 encapdport = 0;
 
-	memset(&ip6rdprefix, 0, sizeof(ip6rdprefix));
-
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/link_vti.c

@@ -46,12 +46,18 @@ static void usage(void)
 static int vti_parse_opt(struct link_util *lu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[1024];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
@@ -63,14 +69,6 @@ static int vti_parse_opt(struct link_util *lu, int argc, char **argv,
 	int len;
 
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/link_vti6.c

@@ -42,12 +42,18 @@ static void usage(void)
 static int vti6_parse_opt(struct link_util *lu, int argc, char **argv,
 			  struct nlmsghdr *n)
 {
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
 	struct {
 		struct nlmsghdr n;
 		struct ifinfomsg i;
 		char buf[1024];
-	} req;
-	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
 	struct rtattr *tb[IFLA_MAX + 1];
 	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
@@ -59,14 +65,6 @@ static int vti6_parse_opt(struct link_util *lu, int argc, char **argv,
 	int len;
 
 	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
-		memset(&req, 0, sizeof(req));
-
-		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
-		req.n.nlmsg_flags = NLM_F_REQUEST;
-		req.n.nlmsg_type = RTM_GETLINK;
-		req.i.ifi_family = preferred_family;
-		req.i.ifi_index = ifi->ifi_index;
-
 		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
 get_failed:
 			fprintf(stderr,

ip/xfrm_policy.c

@@ -248,34 +248,28 @@ static int xfrm_policy_modify(int cmd, unsigned int flags, int argc, char **argv
 		struct nlmsghdr			n;
 		struct xfrm_userpolicy_info	xpinfo;
 		char				buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.xpinfo.sel.family = preferred_family,
+		.xpinfo.lft.soft_byte_limit = XFRM_INF,
+		.xpinfo.lft.hard_byte_limit = XFRM_INF,
+		.xpinfo.lft.soft_packet_limit = XFRM_INF,
+		.xpinfo.lft.hard_packet_limit = XFRM_INF,
+	};
 	char *dirp = NULL;
 	char *selp = NULL;
 	char *ptypep = NULL;
 	char *sctxp = NULL;
-	struct xfrm_userpolicy_type upt;
-	char tmpls_buf[XFRM_TMPLS_BUF_SIZE];
+	struct xfrm_userpolicy_type upt = {};
+	char tmpls_buf[XFRM_TMPLS_BUF_SIZE] = {};
 	int tmpls_len = 0;
 	struct xfrm_mark mark = {0, 0};
 	struct {
 		struct xfrm_user_sec_ctx sctx;
 		char	str[CTX_BUF_SIZE];
-	} ctx;
-
-	memset(&req, 0, sizeof(req));
-	memset(&upt, 0, sizeof(upt));
-	memset(&tmpls_buf, 0, sizeof(tmpls_buf));
-	memset(&ctx, 0, sizeof(ctx));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.xpinfo.sel.family = preferred_family;
-
-	req.xpinfo.lft.soft_byte_limit = XFRM_INF;
-	req.xpinfo.lft.hard_byte_limit = XFRM_INF;
-	req.xpinfo.lft.soft_packet_limit = XFRM_INF;
-	req.xpinfo.lft.hard_packet_limit = XFRM_INF;
+	} ctx = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dir") == 0) {
@@ -561,27 +555,23 @@ static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
 		struct nlmsghdr			n;
 		struct xfrm_userpolicy_id	xpid;
 		char				buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY
+				       : XFRM_MSG_GETPOLICY,
+	};
 	char *dirp = NULL;
 	char *selp = NULL;
 	char *indexp = NULL;
 	char *ptypep = NULL;
 	char *sctxp = NULL;
-	struct xfrm_userpolicy_type upt;
+	struct xfrm_userpolicy_type upt = {};
 	struct xfrm_mark mark = {0, 0};
 	struct {
 		struct xfrm_user_sec_ctx sctx;
 		char    str[CTX_BUF_SIZE];
-	} ctx;
-
-
-	memset(&req, 0, sizeof(req));
-	memset(&upt, 0, sizeof(upt));
-	memset(&ctx, 0, sizeof(ctx));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY : XFRM_MSG_GETPOLICY;
+	} ctx = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dir") == 0) {
@@ -684,11 +674,9 @@ static int xfrm_policy_delete(int argc, char **argv)
 
 static int xfrm_policy_get(int argc, char **argv)
 {
-	char buf[NLMSG_BUF_SIZE];
+	char buf[NLMSG_BUF_SIZE] = {};
 	struct nlmsghdr *n = (struct nlmsghdr *)buf;
 
-	memset(buf, 0, sizeof(buf));
-
 	xfrm_policy_get_or_delete(argc, argv, 0, n, sizeof(buf));
 
 	if (xfrm_policy_print(NULL, n, (void *)stdout) < 0) {
@@ -1012,18 +1000,16 @@ static int xfrm_spd_setinfo(int argc, char **argv)
 		struct nlmsghdr			n;
 		__u32				flags;
 		char				buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_NEWSPDINFO,
+		.flags = 0XFFFFFFFF,
+	};
 
 	char *thr4 = NULL;
 	char *thr6 = NULL;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_NEWSPDINFO;
-	req.flags = 0XFFFFFFFF;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "hthresh4") == 0) {
 			struct xfrmu_spdhthresh thr;
@@ -1080,14 +1066,12 @@ static int xfrm_spd_getinfo(int argc, char **argv)
 		struct nlmsghdr			n;
 		__u32				flags;
 		char				ans[128];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_GETSPDINFO;
-	req.flags = 0XFFFFFFFF;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_GETSPDINFO,
+		.flags = 0XFFFFFFFF,
+	};
 
 	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 		exit(1);
@@ -1108,16 +1092,13 @@ static int xfrm_policy_flush(int argc, char **argv)
 	struct {
 		struct nlmsghdr	n;
 		char		buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(0), /* nlmsg data is nothing */
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_FLUSHPOLICY,
+	};
 	char *ptypep = NULL;
-	struct xfrm_userpolicy_type upt;
-
-	memset(&req, 0, sizeof(req));
-	memset(&upt, 0, sizeof(upt));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(0); /* nlmsg data is nothing */
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_FLUSHPOLICY;
+	struct xfrm_userpolicy_type upt = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "ptype") == 0) {

ip/xfrm_state.c

@@ -271,9 +271,18 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct xfrm_usersa_info xsinfo;
 		char			buf[RTA_BUF_SIZE];
-	} req;
-	struct xfrm_replay_state replay;
-	struct xfrm_replay_state_esn replay_esn;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.xsinfo.family = preferred_family,
+		.xsinfo.lft.soft_byte_limit = XFRM_INF,
+		.xsinfo.lft.hard_byte_limit = XFRM_INF,
+		.xsinfo.lft.soft_packet_limit = XFRM_INF,
+		.xsinfo.lft.hard_packet_limit = XFRM_INF,
+	};
+	struct xfrm_replay_state replay = {};
+	struct xfrm_replay_state_esn replay_esn = {};
 	__u32 replay_window = 0;
 	__u32 seq = 0, oseq = 0, seq_hi = 0, oseq_hi = 0;
 	char *idp = NULL;
@@ -288,22 +297,7 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
 	struct {
 		struct xfrm_user_sec_ctx sctx;
 		char    str[CTX_BUF_SIZE];
-	} ctx;
-
-	memset(&req, 0, sizeof(req));
-	memset(&replay, 0, sizeof(replay));
-	memset(&replay_esn, 0, sizeof(replay_esn));
-	memset(&ctx, 0, sizeof(ctx));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.xsinfo.family = preferred_family;
-
-	req.xsinfo.lft.soft_byte_limit = XFRM_INF;
-	req.xsinfo.lft.hard_byte_limit = XFRM_INF;
-	req.xsinfo.lft.soft_packet_limit = XFRM_INF;
-	req.xsinfo.lft.hard_packet_limit = XFRM_INF;
+	} ctx = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "mode") == 0) {
@@ -369,7 +363,7 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
 				  (void *)&encap, sizeof(encap));
 		} else if (strcmp(*argv, "coa") == 0) {
 			inet_prefix coa;
-			xfrm_address_t xcoa;
+			xfrm_address_t xcoa = {};
 
 			if (coap)
 				duparg("coa", *argv);
@@ -383,7 +377,6 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
 			if (coa.bytelen > sizeof(xcoa))
 				invarg("value after \"coa\" is too large", *argv);
 
-			memset(&xcoa, 0, sizeof(xcoa));
 			memcpy(&xcoa, &coa.data, coa.bytelen);
 
 			addattr_l(&req.n, sizeof(req.buf), XFRMA_COADDR,
@@ -699,30 +692,25 @@ static int xfrm_state_allocspi(int argc, char **argv)
 		struct nlmsghdr	n;
 		struct xfrm_userspi_info xspi;
 		char			buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xspi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_ALLOCSPI,
+		.xspi.info.family = preferred_family,
+#if 0
+		.xspi.lft.soft_byte_limit = XFRM_INF,
+		.xspi.lft.hard_byte_limit = XFRM_INF,
+		.xspi.lft.soft_packet_limit = XFRM_INF,
+		.xspi.lft.hard_packet_limit = XFRM_INF,
+#endif
+	};
 	char *idp = NULL;
 	char *minp = NULL;
 	char *maxp = NULL;
 	struct xfrm_mark mark = {0, 0};
-	char res_buf[NLMSG_BUF_SIZE];
+	char res_buf[NLMSG_BUF_SIZE] = {};
 	struct nlmsghdr *res_n = (struct nlmsghdr *)res_buf;
 
-	memset(res_buf, 0, sizeof(res_buf));
-
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xspi));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_ALLOCSPI;
-	req.xspi.info.family = preferred_family;
-
-#if 0
-	req.xsinfo.lft.soft_byte_limit = XFRM_INF;
-	req.xsinfo.lft.hard_byte_limit = XFRM_INF;
-	req.xsinfo.lft.soft_packet_limit = XFRM_INF;
-	req.xsinfo.lft.hard_packet_limit = XFRM_INF;
-#endif
-
 	while (argc > 0) {
 		if (strcmp(*argv, "mode") == 0) {
 			NEXT_ARG();
@@ -956,18 +944,16 @@ static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
 		struct nlmsghdr	n;
 		struct xfrm_usersa_id	xsid;
 		char			buf[RTA_BUF_SIZE];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA,
+		.xsid.family = preferred_family,
+	};
 	struct xfrm_id id;
 	char *idp = NULL;
 	struct xfrm_mark mark = {0, 0};
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
-	req.xsid.family = preferred_family;
-
 	while (argc > 0) {
 		xfrm_address_t saddr;
 
@@ -1014,11 +1000,9 @@ static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
 		if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
 			exit(2);
 	} else {
-		char buf[NLMSG_BUF_SIZE];
+		char buf[NLMSG_BUF_SIZE] = {};
 		struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
 
-		memset(buf, 0, sizeof(buf));
-
 		if (rtnl_talk(&rth, &req.n, res_n, sizeof(req)) < 0)
 			exit(2);
 
@@ -1282,13 +1266,12 @@ static int xfrm_sad_getinfo(int argc, char **argv)
 		struct nlmsghdr			n;
 		__u32				flags;
 		char				ans[64];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.flags));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_GETSADINFO;
-	req.flags = 0XFFFFFFFF;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.flags)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_GETSADINFO,
+		.flags = 0XFFFFFFFF,
+	};
 
 	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 		exit(1);
@@ -1309,16 +1292,13 @@ static int xfrm_state_flush(int argc, char **argv)
 	struct {
 		struct nlmsghdr			n;
 		struct xfrm_usersa_flush	xsf;
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = XFRM_MSG_FLUSHSA,
+	};
 	char *protop = NULL;
 
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = XFRM_MSG_FLUSHSA;
-	req.xsf.proto = 0;
-
 	while (argc > 0) {
 		if (strcmp(*argv, "proto") == 0) {
 			int ret;

lib/json_writer.c

@@ -33,7 +33,7 @@ struct json_writer {
 static void jsonw_indent(json_writer_t *self)
 {
 	unsigned i;
-	for (i = 0; i <= self->depth; ++i)
+	for (i = 0; i < self->depth; ++i)
 		fputs("    ", self->out);
 }
 
@@ -102,7 +102,6 @@ json_writer_t *jsonw_new(FILE *f)
 		self->depth = 0;
 		self->pretty = false;
 		self->sep = '\0';
-		putc('{', self->out);
 	}
 	return self;
 }
@@ -113,8 +112,7 @@ void jsonw_destroy(json_writer_t **self_p)
 	json_writer_t *self = *self_p;
 
 	assert(self->depth == 0);
-	jsonw_eol(self);
-	fputs("}\n", self->out);
+	fputs("\n", self->out);
 	fflush(self->out);
 	free(self);
 	*self_p = NULL;
@@ -269,6 +267,7 @@ int main(int argc, char **argv)
 {
 	json_writer_t *wr = jsonw_new(stdout);
 
+	jsonw_start_object(wr);
 	jsonw_pretty(wr, true);
 	jsonw_name(wr, "Vyatta");
 	jsonw_start_object(wr);
@@ -305,6 +304,7 @@ int main(int argc, char **argv)
 
 	jsonw_end_object(wr);
 
+	jsonw_end_object(wr);
 	jsonw_destroy(&wr);
 	return 0;
 }

lib/libnetlink.c

@@ -112,19 +112,16 @@ int rtnl_wilddump_req_filter(struct rtnl_handle *rth, int family, int type,
 		/* attribute has to be NLMSG aligned */
 		struct rtattr ext_req __attribute__ ((aligned(NLMSG_ALIGNTO)));
 		__u32 ext_filter_mask;
-	} req;
-
-	memset(&req, 0, sizeof(req));
-	req.nlh.nlmsg_len = sizeof(req);
-	req.nlh.nlmsg_type = type;
-	req.nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
-	req.nlh.nlmsg_pid = 0;
-	req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
-	req.ifm.ifi_family = family;
-
-	req.ext_req.rta_type = IFLA_EXT_MASK;
-	req.ext_req.rta_len = RTA_LENGTH(sizeof(__u32));
-	req.ext_filter_mask = filt_mask;
+	} req = {
+		.nlh.nlmsg_len = sizeof(req),
+		.nlh.nlmsg_type = type,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = rth->dump = ++rth->seq,
+		.ifm.ifi_family = family,
+		.ext_req.rta_type = IFLA_EXT_MASK,
+		.ext_req.rta_len = RTA_LENGTH(sizeof(__u32)),
+		.ext_filter_mask = filt_mask,
+	};
 
 	return send(rth->fd, (void*)&req, sizeof(req), 0);
 }
@@ -136,20 +133,18 @@ int rtnl_wilddump_req_filter_fn(struct rtnl_handle *rth, int family, int type,
 		struct nlmsghdr nlh;
 		struct ifinfomsg ifm;
 		char buf[1024];
-	} req;
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+		.nlh.nlmsg_type = type,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = rth->dump = ++rth->seq,
+		.ifm.ifi_family = family,
+	};
 	int err;
 
 	if (!filter_fn)
 		return -EINVAL;
 
-	memset(&req, 0, sizeof(req));
-	req.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.nlh.nlmsg_type = type;
-	req.nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
-	req.nlh.nlmsg_pid = 0;
-	req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
-	req.ifm.ifi_family = family;
-
 	err = filter_fn(&req.nlh, sizeof(req));
 	if (err)
 		return err;
@@ -197,7 +192,12 @@ int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int len)
 
 int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
 {
-	struct nlmsghdr nlh;
+	struct nlmsghdr nlh = {
+		.nlmsg_len = NLMSG_LENGTH(len),
+		.nlmsg_type = type,
+		.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.nlmsg_seq = rth->dump = ++rth->seq,
+	};
 	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	struct iovec iov[2] = {
 		{ .iov_base = &nlh, .iov_len = sizeof(nlh) },
@@ -205,17 +205,11 @@ int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
 	};
 	struct msghdr msg = {
 		.msg_name = &nladdr,
-		.msg_namelen = 	sizeof(nladdr),
+		.msg_namelen = sizeof(nladdr),
 		.msg_iov = iov,
 		.msg_iovlen = 2,
 	};
 
-	nlh.nlmsg_len = NLMSG_LENGTH(len);
-	nlh.nlmsg_type = type;
-	nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
-	nlh.nlmsg_pid = 0;
-	nlh.nlmsg_seq = rth->dump = ++rth->seq;
-
 	return sendmsg(rth->fd, &msg, 0);
 }
 
@@ -365,7 +359,7 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 	int status;
 	unsigned seq;
 	struct nlmsghdr *h;
-	struct sockaddr_nl nladdr;
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	struct iovec iov = {
 		.iov_base = (void*) n,
 		.iov_len = n->nlmsg_len
@@ -376,10 +370,7 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 		.msg_iov = &iov,
 		.msg_iovlen = 1,
 	};
-	char   buf[32768];
-
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
+	char   buf[32768] = {};
 
 	n->nlmsg_seq = seq = ++rtnl->seq;
 
@@ -392,8 +383,6 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 		return -1;
 	}
 
-	memset(buf,0,sizeof(buf));
-
 	iov.iov_base = buf;
 	while (1) {
 		iov.iov_len = sizeof(buf);
@@ -498,7 +487,7 @@ int rtnl_listen(struct rtnl_handle *rtnl,
 {
 	int status;
 	struct nlmsghdr *h;
-	struct sockaddr_nl nladdr;
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	struct iovec iov;
 	struct msghdr msg = {
 		.msg_name = &nladdr,
@@ -514,11 +503,6 @@ int rtnl_listen(struct rtnl_handle *rtnl,
 		msg.msg_controllen = sizeof(cmsgbuf);
 	}
 
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-	nladdr.nl_pid = 0;
-	nladdr.nl_groups = 0;
-
 	iov.iov_base = buf;
 	while (1) {
 		struct rtnl_ctrl_data ctrl;
@@ -595,15 +579,10 @@ int rtnl_from_file(FILE *rtnl, rtnl_listen_filter_t handler,
 		   void *jarg)
 {
 	int status;
-	struct sockaddr_nl nladdr;
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	char   buf[16384];
 	struct nlmsghdr *h = (void*)buf;
 
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-	nladdr.nl_pid = 0;
-	nladdr.nl_groups = 0;
-
 	while (1) {
 		int err, len;
 		int l;

lib/ll_map.c

@@ -103,7 +103,6 @@ int ll_remember_index(const struct sockaddr_nl *who,
 		return 0;
 	}
 
-	memset(tb, 0, sizeof(tb));
 	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), IFLA_PAYLOAD(n));
 	ifname = rta_getattr_str(tb[IFLA_IFNAME]);
 	if (ifname == NULL)

lib/names.c

@@ -54,15 +54,12 @@ struct db_names *db_names_alloc(void)
 {
 	struct db_names *db;
 
-	db = malloc(sizeof(*db));
+	db = calloc(1, sizeof(*db));
 	if (!db)
 		return NULL;
 
-	memset(db, 0, sizeof(*db));
-
 	db->size = MAX_ENTRIES;
-	db->hash = malloc(sizeof(struct db_entry *) * db->size);
-	memset(db->hash, 0, sizeof(struct db_entry *) * db->size);
+	db->hash = calloc(db->size, sizeof(struct db_entry *));
 
 	return db;
 }

man/man8/bridge.8

@@ -20,8 +20,9 @@ bridge \- show / manipulate bridge addresses and devices
 .IR OPTIONS " := { "
 \fB\-V\fR[\fIersion\fR] |
 \fB\-s\fR[\fItatistics\fR] |
-\fB\-n\fR[\fIetns\fR] name }
-\fB\-b\fR[\fIatch\fR] filename }
+\fB\-n\fR[\fIetns\fR] name |
+\fB\-b\fR[\fIatch\fR] filename |
+\fB\-j\fR[\fIson\fR] }
 
 .ti -8
 .BR "bridge link set"
@@ -153,6 +154,10 @@ Don't terminate bridge command on errors in batch mode.
 If there were any errors during execution of the commands, the application
 return code will be non zero.
 
+.TP
+.BR "\-json"
+Display results in JSON format. Currently available for vlan and fdb.
+
 .SH BRIDGE - COMMAND SYNTAX
 
 .SS

man/man8/ip-address.8.in

@@ -77,14 +77,15 @@ ip-address \- protocol address management
 .IR FLAG " := "
 .RB "[ " permanent " | " dynamic " | " secondary " | " primary " |"
 .RB [ - ] tentative " | [" - ] deprecated " | [" - ] dadfailed " |"
-.BR temporary " | " CONFFLAG-LIST " ]"
+.BR temporary " |"
+.IR CONFFLAG-LIST " ]"
 
 .ti -8
 .IR CONFFLAG-LIST " := [ "  CONFFLAG-LIST " ] " CONFFLAG
 
 .ti -8
 .IR CONFFLAG " := "
-.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " ]"
+.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " | " autojoin " ]"
 
 .ti -8
 .IR LIFETIME " := [ "
@@ -249,6 +250,26 @@ address, and don't search for one to delete when removing the address. Changing
 an address to add this flag will remove the automatically added prefix route,
 changing it to remove this flag will create the prefix route automatically.
 
+.TP
+.B autojoin
+Joining multicast groups on Ethernet level via
+.B "ip maddr"
+command does not work if connected to an Ethernet switch that does IGMP
+snooping since the switch would not replicate multicast packets on ports that
+did not have IGMP reports for the multicast addresses.
+
+Linux VXLAN interfaces created via
+.B "ip link add vxlan"
+have the
+.B group
+option that enables them to do the required join.
+
+Using the
+.B autojoin
+flag when adding a multicast address enables similar functionality for
+Openvswitch VXLAN interfaces as well as other tunneling mechanisms that need to
+receive multicast traffic.
+
 .SS ip address delete - delete protocol address
 .B Arguments:
 coincide with the arguments of

man/man8/ip-link.8.in

@@ -39,35 +39,6 @@ ip-link \- network device configuration
 .BI type " TYPE"
 .RI "[ " ARGS " ]"
 
-.ti -8
-.IR TYPE " := [ "
-.BR bridge " | "
-.BR bond " | "
-.BR can " | "
-.BR dummy " | "
-.BR hsr " | "
-.BR ifb " | "
-.BR ipoib " |"
-.BR macvlan  " | "
-.BR macvtap  " | "
-.BR vcan " | "
-.BR veth " | "
-.BR vlan " | "
-.BR vxlan " |"
-.BR ip6tnl " |"
-.BR ipip " |"
-.BR sit " |"
-.BR gre " |"
-.BR gretap " |"
-.BR ip6gre " |"
-.BR ip6gretap " |"
-.BR vti " |"
-.BR nlmon " |"
-.BR ipvlan " |"
-.BR lowpan " |"
-.BR geneve " |"
-.BR vrf " ]"
-
 .ti -8
 .BR "ip link delete " {
 .IR DEVICE " | "
@@ -80,7 +51,12 @@ ip-link \- network device configuration
 .BR "ip link set " {
 .IR DEVICE " | "
 .BI "group " GROUP
-.RB "} [ { " up " | " down " } ]"
+}
+.br
+.RB "[ { " up " | " down " } ]"
+.br
+.RB "[ " type
+.IR "ETYPE TYPE_ARGS" " ]"
 .br
 .RB "[ " arp " { " on " | " off " } ]"
 .br
@@ -173,7 +149,7 @@ ip-link \- network device configuration
 .B master
 .IR DEVICE " ] ["
 .B type
-.IR TYPE " ]"
+.IR ETYPE " ]"
 .B vrf
 .IR NAME " ]"
 
@@ -181,6 +157,39 @@ ip-link \- network device configuration
 .B ip link help
 .RI "[ " TYPE " ]"
 
+.ti -8
+.IR TYPE " := [ "
+.BR bridge " | "
+.BR bond " | "
+.BR can " | "
+.BR dummy " | "
+.BR hsr " | "
+.BR ifb " | "
+.BR ipoib " |"
+.BR macvlan  " | "
+.BR macvtap  " | "
+.BR vcan " | "
+.BR veth " | "
+.BR vlan " | "
+.BR vxlan " |"
+.BR ip6tnl " |"
+.BR ipip " |"
+.BR sit " |"
+.BR gre " |"
+.BR gretap " |"
+.BR ip6gre " |"
+.BR ip6gretap " |"
+.BR vti " |"
+.BR nlmon " |"
+.BR ipvlan " |"
+.BR lowpan " |"
+.BR geneve " |"
+.BR vrf " ]"
+
+.ti -8
+.IR ETYPE " := [ " TYPE " |"
+.BR bridge_slave " | " bond_slave " ]"
+
 .SH "DESCRIPTION"
 .SS ip link add - add virtual link
 
@@ -299,7 +308,7 @@ the following additional arguments are supported:
 .BI "ip link add
 .BI link " DEVICE "
 .BI name " NAME "
-.BI type " vlan "
+.B "type vlan"
 [
 .BI protocol " VLAN_PROTO "
 ]
@@ -401,7 +410,7 @@ For a link of type
 the following additional arguments are supported:
 
 .BI "ip link add " DEVICE
-.BI type " vxlan " id " ID"
+.BI type " vxlan " id " VNI"
 [
 .BI dev " PHYS_DEV "
 .RB " ] [ { " group " | " remote " } "
@@ -420,27 +429,27 @@ the following additional arguments are supported:
 ] [
 .BI srcport " MIN MAX "
 ] [
-.I "[no]learning "
+.RB [ no ] learning
 ] [
-.I "[no]proxy "
+.RB [ no ] proxy
 ] [
-.I "[no]rsc "
+.RB [ no ] rsc
 ] [
-.I "[no]l2miss "
+.RB [ no ] l2miss
 ] [
-.I "[no]l3miss "
+.RB [ no ] l3miss
 ] [
-.I "[no]udpcsum "
+.RB [ no ] udpcsum
 ] [
-.I "[no]udp6zerocsumtx "
+.RB [ no ] udp6zerocsumtx
 ] [
-.I "[no]udp6zerocsumrx "
+.RB [ no ] udp6zerocsumrx
 ] [
 .BI ageing " SECONDS "
 ] [
 .BI maxaddress " NUMBER "
 ] [
-.RI "[no]external "
+.RB [ no ] external
 ] [
 .B gbp
 ] [
@@ -497,36 +506,36 @@ parameter.
 source ports to communicate to the remote VXLAN tunnel endpoint.
 
 .sp
-.I [no]learning
+.RB [ no ] learning
 - specifies if unknown source link layer addresses and IP addresses
 are entered into the VXLAN device forwarding database.
 
 .sp
-.I [no]rsc
+.RB [ no ] rsc
 - specifies if route short circuit is turned on.
 
 .sp
-.I [no]proxy
+.RB [ no ] proxy
 - specifies ARP proxy is turned on.
 
 .sp
-.I [no]l2miss
+.RB [ no ] l2miss
 - specifies if netlink LLADDR miss notifications are generated.
 
 .sp
-.I [no]l3miss
+.RB [ no ] l3miss
 - specifies if netlink IP ADDR miss notifications are generated.
 
 .sp
-.I [no]udpcsum
+.RB [ no ] udpcsum
 - specifies if UDP checksum is calculated for transmitted packets over IPv4.
 
 .sp
-.I [no]udp6zerocsumtx
+.RB [ no ] udp6zerocsumtx
 - skip UDP checksum calculation for transmitted packets over IPv6.
 
 .sp
-.I [no]udp6zerocsumrx
+.RB [ no ] udp6zerocsumrx
 - allow incoming UDP packets over IPv6 with zero checksum field.
 
 .sp
@@ -538,7 +547,7 @@ are entered into the VXLAN device forwarding database.
 - specifies the maximum number of FDB entries.
 
 .sp
-.I [no]external
+.RB [ no ] external
 - specifies whether an external control plane
 .RB "(e.g. " "ip route encap" )
 or the internal FDB should be used.
@@ -602,18 +611,18 @@ For a link of types
 the following additional arguments are supported:
 
 .BI "ip link add " DEVICE
-.BR type " { gre | ipip | sit } "
+.BR type " { " gre " | " ipip " | " sit " }"
 .BI " remote " ADDR " local " ADDR
 [
-.BR encap " { fou | gue | none } "
+.BR encap " { " fou " | " gue " | " none " }"
 ] [
-.BI "encap-sport { " PORT " | auto } "
+.BR encap-sport " { " \fIPORT " | " auto " }"
 ] [
 .BI "encap-dport " PORT
 ] [
-.I " [no]encap-csum "
+.RB [ no ] encap-csum
 ] [
-.I " [no]encap-remcsum "
+.RB [ no ] encap-remcsum
 ]
 
 .in +8
@@ -627,12 +636,12 @@ the following additional arguments are supported:
 It must be an address on another interface on this host.
 
 .sp
-.BR encap " { fou | gue | none } "
+.BR encap " { " fou " | " gue " | " none " }"
 - specifies type of secondary UDP encapsulation. "fou" indicates
 Foo-Over-UDP, "gue" indicates Generic UDP Encapsulation.
 
 .sp
-.BI "encap-sport { " PORT " | auto } "
+.BR encap-sport " { " \fIPORT " | " auto " }"
 - specifies the source port in UDP encapsulation.
 .IR PORT
 indicates the port by number, "auto"
@@ -641,12 +650,12 @@ indicates that the port number should be chosen automatically
 encapsulated packet).
 
 .sp
-.I [no]encap-csum
+.RB [ no ] encap-csum
 - specifies if UDP checksums are enabled in the secondary
 encapsulation.
 
 .sp
-.I [no]encap-remcsum
+.RB [ no ] encap-remcsum
 - specifies if Remote Checksum Offload is enabled. This is only
 applicable for Generic UDP Encapsulation.
 
@@ -659,13 +668,15 @@ For a link of type
 the following additional arguments are supported:
 
 .BI "ip link add " DEVICE
-.BI type " { ip6gre | ip6gretap }  " remote " ADDR " local " ADDR
+.BR type " { " ip6gre " | " ip6gretap " }"
+.BI remote " ADDR " local " ADDR"
 [
-.I "[i|o]seq]"
+.RB [ i | o ] seq
 ] [
-.I "[i|o]key" KEY
+.RB [ i | o ] key
+.I KEY
 ] [
-.I " [i|o]csum "
+.RB [ i | o ] csum
 ] [
 .BI hoplimit " TTL "
 ] [
@@ -691,7 +702,7 @@ the following additional arguments are supported:
 It must be an address on another interface on this host.
 
 .sp
-.BI  [i|o]seq
+.RB  [ i | o ] seq
 - serialize packets.
 The
 .B oseq
@@ -701,7 +712,7 @@ The
 flag requires that all input packets are serialized.
 
 .sp
-.BI  [i|o]key " KEY"
+.RB  [ i | o ] key " \fIKEY"
 - use keyed GRE with key
 .IR KEY ". "KEY
 is either a number or an IPv4 address-like dotted quad.
@@ -713,7 +724,7 @@ The
 parameters specify different keys for input and output.
 
 .sp
-.BI  [i|o]csum
+.RB  [ i | o ] csum
 - generate/require checksums for tunneled packets.
 The
 .B ocsum
@@ -765,7 +776,7 @@ For a link of type
 the following additional arguments are supported:
 
 .BI "ip link add " DEVICE " name " NAME
-.BI type " ipoib [ " pkey " PKEY ] [" mode " MODE " ]
+.BR "type ipoib " [ " pkey \fIPKEY" " ] [ " mode " \fIMODE \fR]"
 
 .in +8
 .sp
@@ -782,7 +793,7 @@ For a link of type
 the following additional arguments are supported:
 
 .BI "ip link add " DEVICE
-.BI type " geneve " id " ID " remote " IPADDR"
+.BI type " geneve " id " VNI " remote " IPADDR"
 [
 .BI ttl " TTL "
 ] [
@@ -825,7 +836,7 @@ the following additional arguments are supported:
 .BI "ip link add link " DEVICE " name " NAME
 .BR type " { " macvlan " | " macvtap " } "
 .BR mode " { " private " | " vepa " | " bridge " | " passthru
-.BR " [ " nopromisc " ] } "
+.RB " [ " nopromisc " ] } "
 
 .in +8
 .sp
@@ -870,11 +881,11 @@ For a link of type
 .I HSR
 the following additional arguments are supported:
 
-.BI "ip link add link " DEVICE " name " NAME
-.BI type " hsr "
+.BI "ip link add link " DEVICE " name " NAME " type hsr"
 .BI slave1 " SLAVE1-IF " slave2 " SLAVE2-IF "
-.BR " [ supervision " ADDR-BYTE "  ] "
-.BR " [ version  { " 0 " | " 1 " } ] "
+.RB [ " supervision"
+.IR ADDR-BYTE " ] ["
+.BR version " { " 0 " | " 1 " } ]"
 
 .in +8
 .sp
@@ -887,11 +898,11 @@ the following additional arguments are supported:
 .BI slave2 " SLAVE2-IF "
 - Specifies the physical device used for the second of the two ring ports.
 
-.BR "supervision ADDR-BYTE "
+.BI supervision " ADDR-BYTE"
 - The last byte of the multicast address used for HSR supervision frames.
 Default option is "0", possible values 0-255.
 
-.BR "version { 0 | 1 }"
+.BR version " { " 0 " | " 1 " }"
 - Selects the protocol version of the interface. Default option is "0", which
 corresponds to the 2010 version of the HSR standard. Option "1" activates the
 2012 version.
@@ -1010,6 +1021,18 @@ specifies the type of the device.
 
 .SS ip link set - change device attributes
 
+.PP
+.B Warning:
+If multiple parameter changes are requested,
+.B ip
+aborts immediately after any of the changes have failed.
+This is the only case when
+.B ip
+can move the system to an unpredictable state. The solution
+is to avoid changing several parameters with one
+.B ip link set
+call.
+
 .TP
 .BI dev " DEVICE "
 .I DEVICE
@@ -1236,17 +1259,134 @@ set the IPv6 address generation mode
 .BR "link-netnsid "
 set peer netnsid for a cross-netns interface
 
-.PP
-.B Warning:
-If multiple parameter changes are requested,
-.B ip
-aborts immediately after any of the changes have failed.
-This is the only case when
-.B ip
-can move the system to an unpredictable state. The solution
-is to avoid changing several parameters with one
-.B ip link set
-call.
+.TP
+.BI type " ETYPE TYPE_ARGS"
+Change type-specific settings. For a list of supported types and arguments refer
+to the description of
+.B "ip link add"
+above. In addition to that, it is possible to manipulate settings to slave
+devices:
+
+.TP
+Bridge Slave Support
+For a link with master
+.B bridge
+the following additional arguments are supported:
+
+.B "ip link set type bridge_slave"
+[
+.BI state " STATE"
+] [
+.BI priority " PRIO"
+] [
+.BI cost " COST"
+] [
+.BR guard " { " on " | " off " }"
+] [
+.BR hairpin " { " on " | " off " }"
+] [
+.BR fastleave " { " on " | " off " }"
+] [
+.BR root_block " { " on " | " off " }"
+] [
+.BR learning " { " on " | " off " }"
+] [
+.BR flood " { " on " | " off " }"
+] [
+.BR proxy_arp " { " on " | " off " }"
+] [
+.BR proxy_arp_wifi " { " on " | " off " }"
+] [
+.BI mcast_router " MULTICAST_ROUTER"
+] [
+.BR mcast_fast_leave " { " on " | " off "} ]"
+
+.in +8
+.sp
+.BI state " STATE"
+- Set port state.
+.I STATE
+is a number representing the following states:
+.BR 0 " (disabled),"
+.BR 1 " (listening),"
+.BR 2 " (learning),"
+.BR 3 " (forwarding),"
+.BR 4 " (blocking)."
+
+.BI priority " PRIO"
+- set port priority (a 16bit unsigned value).
+
+.BI cost " COST"
+- set port cost (a 32bit unsigned value).
+
+.BR guard " { " on " | " off " }"
+- block incoming BPDU packets on this port.
+
+.BR hairpin " { " on " | " off " }"
+- enable hairpin mode on this port. This will allow incoming packets on this
+port to be reflected back.
+
+.BR fastleave " { " on " | " off " }"
+- enable multicast fast leave on this port.
+
+.BR root_block " { " on " | " off " }"
+- block this port from becoming the bridge's root port.
+
+.BR learning " { " on " | " off " }"
+- allow MAC address learning on this port.
+
+.BR flood " { " on " | " off " }"
+- open the flood gates on this port, i.e. forward all unicast frames to this
+port also. Requires
+.BR proxy_arp " and " proxy_arp_wifi
+to be turned off.
+
+.BR proxy_arp " { " on " | " off " }"
+- enable proxy ARP on this port.
+
+.BR proxy_arp_wifi " { " on " | " off " }"
+- enable proxy ARP on this port which meets extended requirements by IEEE
+802.11 and Hotspot 2.0 specifications.
+
+.BI mcast_router " MULTICAST_ROUTER"
+- configure this port for having multicast routers attached. A port with a
+multicast router will receive all multicast traffic.
+.I MULTICAST_ROUTER
+may be either
+.B 0
+to disable multicast routers on this port,
+.B 1
+to let the system detect the presence of of routers (this is the default),
+.B 2
+to permanently enable multicast traffic forwarding on this port or
+.B 3
+to enable multicast routers temporarily on this port, not depending on incoming
+queries.
+
+.BR mcast_fast_leave " { " on " | " off " }"
+- this is a synonym to the
+.B fastleave
+option above.
+
+.in -8
+
+.TP
+Bonding Slave Support
+For a link with master
+.B bond
+the following additional arguments are supported:
+
+.B "ip link set type bond_slave"
+[
+.BI queue_id " ID"
+]
+
+.in +8
+.sp
+.BI queue_id " ID"
+- set the slave's queue ID (a 16bit unsigned value).
+
+.in -8
 
 .SS  ip link show - display device attributes
 

man/man8/ss.8

@@ -21,6 +21,9 @@ Show summary of options.
 .B \-V, \-\-version
 Output version information.
 .TP
+.B \-H, \-\-no-header
+Suppress header line.
+.TP
 .B \-n, \-\-numeric
 Do not try to resolve service names.
 .TP

misc/arpd.c

@@ -179,16 +179,22 @@ static void undo_sysctl_adjustments(void)
 
 static int send_probe(int ifindex, __u32 addr)
 {
-	struct ifreq ifr;
-	struct sockaddr_in dst;
+	struct ifreq ifr = { .ifr_ifindex = ifindex };
+	struct sockaddr_in dst = {
+		.sin_family = AF_INET,
+		.sin_port = htons(1025),
+		.sin_addr.s_addr = addr,
+	};
 	socklen_t len;
 	unsigned char buf[256];
 	struct arphdr *ah = (struct arphdr *)buf;
 	unsigned char *p = (unsigned char *)(ah+1);
-	struct sockaddr_ll sll;
+	struct sockaddr_ll sll = {
+		.sll_family = AF_PACKET,
+		.sll_ifindex = ifindex,
+		.sll_protocol = htons(ETH_P_ARP),
+	};
 
-	memset(&ifr, 0, sizeof(ifr));
-	ifr.ifr_ifindex = ifindex;
 	if (ioctl(udp_sock, SIOCGIFNAME, &ifr))
 		return -1;
 	if (ioctl(udp_sock, SIOCGIFHWADDR, &ifr))
@@ -198,9 +204,6 @@ static int send_probe(int ifindex, __u32 addr)
 	if (setsockopt(udp_sock, SOL_SOCKET, SO_BINDTODEVICE, ifr.ifr_name, strlen(ifr.ifr_name)+1) < 0)
 		return -1;
 
-	dst.sin_family = AF_INET;
-	dst.sin_port = htons(1025);
-	dst.sin_addr.s_addr = addr;
 	if (connect(udp_sock, (struct sockaddr *)&dst, sizeof(dst)) < 0)
 		return -1;
 	len = sizeof(dst);
@@ -219,10 +222,7 @@ static int send_probe(int ifindex, __u32 addr)
 	memcpy(p, &dst.sin_addr, 4);
 	p += 4;
 
-	sll.sll_family = AF_PACKET;
 	memset(sll.sll_addr, 0xFF, sizeof(sll.sll_addr));
-	sll.sll_ifindex = ifindex;
-	sll.sll_protocol = htons(ETH_P_ARP);
 	memcpy(p, &sll.sll_addr, ah->ar_hln);
 	p += ah->ar_hln;
 
@@ -268,18 +268,15 @@ static int respond_to_kernel(int ifindex, __u32 addr, char *lla, int llalen)
 		struct nlmsghdr	n;
 		struct ndmsg		ndm;
 		char			buf[256];
-	} req;
-
-	memset(&req.n, 0, sizeof(req.n));
-	memset(&req.ndm, 0, sizeof(req.ndm));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST;
-	req.n.nlmsg_type = RTM_NEWNEIGH;
-	req.ndm.ndm_family = AF_INET;
-	req.ndm.ndm_state = NUD_STALE;
-	req.ndm.ndm_ifindex = ifindex;
-	req.ndm.ndm_type = RTN_UNICAST;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_NEWNEIGH,
+		.ndm.ndm_family = AF_INET,
+		.ndm.ndm_state = NUD_STALE,
+		.ndm.ndm_ifindex = ifindex,
+		.ndm.ndm_type = RTN_UNICAST,
+	};
 
 	addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4);
 	addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen);
@@ -440,7 +437,7 @@ static void get_kern_msg(void)
 {
 	int status;
 	struct nlmsghdr *h;
-	struct sockaddr_nl nladdr;
+	struct sockaddr_nl nladdr = {};
 	struct iovec iov;
 	char   buf[8192];
 	struct msghdr msg = {
@@ -450,8 +447,6 @@ static void get_kern_msg(void)
 		0
 	};
 
-	memset(&nladdr, 0, sizeof(nladdr));
-
 	iov.iov_base = buf;
 	iov.iov_len = sizeof(buf);
 
@@ -539,10 +534,8 @@ static void get_arp_pkt(void)
 
 static void catch_signal(int sig, void (*handler)(int))
 {
-	struct sigaction sa;
+	struct sigaction sa = { .sa_handler = handler };
 
-	memset(&sa, 0, sizeof(sa));
-	sa.sa_handler = handler;
 #ifdef SA_INTERRUPT
 	sa.sa_flags = SA_INTERRUPT;
 #endif
@@ -668,9 +661,8 @@ int main(int argc, char **argv)
 
 	if (ifnum) {
 		int i;
-		struct ifreq ifr;
+		struct ifreq ifr = {};
 
-		memset(&ifr, 0, sizeof(ifr));
 		for (i = 0; i < ifnum; i++) {
 			strncpy(ifr.ifr_name, ifnames[i], IFNAMSIZ);
 			if (ioctl(udp_sock, SIOCGIFINDEX, &ifr)) {
@@ -772,12 +764,12 @@ int main(int argc, char **argv)
 	}
 
 	if (1) {
-		struct sockaddr_ll sll;
+		struct sockaddr_ll sll = {
+			.sll_family = AF_PACKET,
+			.sll_protocol = htons(ETH_P_ARP),
+			.sll_ifindex = (ifnum == 1 ? ifvec[0] : 0),
+		};
 
-		memset(&sll, 0, sizeof(sll));
-		sll.sll_family = AF_PACKET;
-		sll.sll_protocol = htons(ETH_P_ARP);
-		sll.sll_ifindex = (ifnum == 1 ? ifvec[0] : 0);
 		if (bind(pset[0].fd, (struct sockaddr *)&sll, sizeof(sll)) < 0) {
 			perror("bind");
 			goto do_abort;

misc/ifstat.c

@@ -245,6 +245,7 @@ static void dump_raw_db(FILE *fp, int to_hist)
 
 	h = hist_db;
 	if (jw) {
+		jsonw_start_object(jw);
 		jsonw_pretty(jw, pretty);
 		jsonw_name(jw, info_source);
 		jsonw_start_object(jw);
@@ -287,6 +288,8 @@ static void dump_raw_db(FILE *fp, int to_hist)
 		}
 	}
 	if (jw) {
+		jsonw_end_object(jw);
+
 		jsonw_end_object(jw);
 		jsonw_destroy(&jw);
 	}
@@ -451,6 +454,7 @@ static void dump_kern_db(FILE *fp)
 	struct ifstat_ent *n;
 
 	if (jw) {
+		jsonw_start_object(jw);
 		jsonw_pretty(jw, pretty);
 		jsonw_name(jw, info_source);
 		jsonw_start_object(jw);
@@ -477,6 +481,7 @@ static void dump_incr_db(FILE *fp)
 
 	h = hist_db;
 	if (jw) {
+		jsonw_start_object(jw);
 		jsonw_pretty(jw, pretty);
 		jsonw_name(jw, info_source);
 		jsonw_start_object(jw);
@@ -508,6 +513,8 @@ static void dump_incr_db(FILE *fp)
 	}
 
 	if (jw) {
+		jsonw_end_object(jw);
+
 		jsonw_end_object(jw);
 		jsonw_destroy(&jw);
 	}

misc/lnstat.c

@@ -182,10 +182,8 @@ static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
 	static struct table_hdr th;
 	int ofs = 0;
 
-	for (i = 0; i < HDR_LINES; i++) {
-		th.hdr[i] = malloc(HDR_LINE_LENGTH);
-		memset(th.hdr[i], 0, HDR_LINE_LENGTH);
-	}
+	for (i = 0; i < HDR_LINES; i++)
+		th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
 
 	for (i = 0; i < fps->num; i++) {
 		char *cname, *fname = fps->params[i].lf->name;

misc/lnstat_util.c

@@ -173,15 +173,13 @@ static struct lnstat_file *alloc_and_open(const char *path, const char *file)
 	struct lnstat_file *lf;
 
 	/* allocate */
-	lf = malloc(sizeof(*lf));
+	lf = calloc(1, sizeof(*lf));
 	if (!lf) {
 		fprintf(stderr, "out of memory\n");
 		return NULL;
 	}
 
 	/* initialize */
-	memset(lf, 0, sizeof(*lf));
-
 	/* de->d_name is guaranteed to be <= NAME_MAX */
 	strcpy(lf->basename, file);
 	strcpy(lf->path, path);

misc/nstat.c

@@ -285,6 +285,7 @@ static void dump_kern_db(FILE *fp, int to_hist)
 
 	h = hist_db;
 	if (jw) {
+		jsonw_start_object(jw);
 		jsonw_pretty(jw, pretty);
 		jsonw_name(jw, info_source);
 		jsonw_start_object(jw);
@@ -317,6 +318,8 @@ static void dump_kern_db(FILE *fp, int to_hist)
 	}
 
 	if (jw) {
+		jsonw_end_object(jw);
+
 		jsonw_end_object(jw);
 		jsonw_destroy(&jw);
 	}
@@ -329,6 +332,7 @@ static void dump_incr_db(FILE *fp)
 
 	h = hist_db;
 	if (jw) {
+		jsonw_start_object(jw);
 		jsonw_pretty(jw, pretty);
 		jsonw_name(jw, info_source);
 		jsonw_start_object(jw);
@@ -364,6 +368,8 @@ static void dump_incr_db(FILE *fp)
 	}
 
 	if (jw) {
+		jsonw_end_object(jw);
+
 		jsonw_end_object(jw);
 		jsonw_destroy(&jw);
 	}

misc/ss.c

@@ -97,6 +97,7 @@ int show_tcpinfo;
 int show_bpf;
 int show_proc_ctx;
 int show_sock_ctx;
+int show_header = 1;
 /* If show_users & show_proc_ctx only do user_ent_hash_build() once */
 int user_ent_hash_build_init;
 int follow_events;
@@ -1435,11 +1436,13 @@ void *parse_devcond(char *name)
 	a.iface = xll_name_to_index(name);
 	if (a.iface == 0) {
 		char *end;
-		unsigned long res;
+		unsigned long n;
 
-		res = strtoul(name, &end, 0);
-		if (!end || end == name || *end || res > UINT_MAX)
+		n = strtoul(name, &end, 0);
+		if (!end || end == name || *end || n > UINT_MAX)
 			return NULL;
+
+		a.iface = n;
 	}
 
 	res = malloc(sizeof(*res));
@@ -2163,11 +2166,17 @@ static int inet_show_sock(struct nlmsghdr *nlh,
 
 static int tcpdiag_send(int fd, int protocol, struct filter *f)
 {
-	struct sockaddr_nl nladdr;
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	struct {
 		struct nlmsghdr nlh;
 		struct inet_diag_req r;
-	} req;
+	} req = {
+		.nlh.nlmsg_len = sizeof(req),
+		.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = MAGIC_SEQ,
+		.r.idiag_family = AF_INET,
+		.r.idiag_states = f->states,
+	};
 	char    *bc = NULL;
 	int	bclen;
 	struct msghdr msg;
@@ -2178,20 +2187,10 @@ static int tcpdiag_send(int fd, int protocol, struct filter *f)
 	if (protocol == IPPROTO_UDP)
 		return -1;
 
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-
-	req.nlh.nlmsg_len = sizeof(req);
 	if (protocol == IPPROTO_TCP)
 		req.nlh.nlmsg_type = TCPDIAG_GETSOCK;
 	else
 		req.nlh.nlmsg_type = DCCPDIAG_GETSOCK;
-	req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
-	req.nlh.nlmsg_pid = 0;
-	req.nlh.nlmsg_seq = MAGIC_SEQ;
-	memset(&req.r, 0, sizeof(req.r));
-	req.r.idiag_family = AF_INET;
-	req.r.idiag_states = f->states;
 	if (show_mem) {
 		req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
 		req.r.idiag_ext |= (1<<(INET_DIAG_SKMEMINFO-1));
@@ -2236,8 +2235,7 @@ static int tcpdiag_send(int fd, int protocol, struct filter *f)
 
 static int sockdiag_send(int family, int fd, int protocol, struct filter *f)
 {
-	struct sockaddr_nl nladdr;
-
+	struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 	DIAG_REQUEST(req, struct inet_diag_req_v2 r);
 	char    *bc = NULL;
 	int	bclen;
@@ -2249,9 +2247,6 @@ static int sockdiag_send(int family, int fd, int protocol, struct filter *f)
 	if (family == PF_UNSPEC)
 		return tcpdiag_send(fd, protocol, f);
 
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-
 	memset(&req.r, 0, sizeof(req.r));
 	req.r.sdiag_family = family;
 	req.r.sdiag_protocol = protocol;
@@ -2747,14 +2742,13 @@ static void unix_stats_print(struct sockstat *list, struct filter *f)
 		}
 
 		if (use_proc && f->f) {
-			struct sockstat st;
+			struct sockstat st = {
+				.local.family = AF_UNIX,
+				.remote.family = AF_UNIX,
+			};
 
-			st.local.family = AF_UNIX;
-			st.remote.family = AF_UNIX;
 			memcpy(st.local.data, &s->name, sizeof(s->name));
-			if (strcmp(peer, "*") == 0)
-				memset(st.remote.data, 0, sizeof(peer));
-			else
+			if (strcmp(peer, "*"))
 				memcpy(st.remote.data, &peer, sizeof(peer));
 			if (run_ssfilter(f->f, &st) == 0)
 				continue;
@@ -3667,6 +3661,7 @@ static void _usage(FILE *dest)
 "       FAMILY := {inet|inet6|link|unix|netlink|help}\n"
 "\n"
 "   -K, --kill          forcibly close sockets, display what was closed\n"
+"   -H, --no-header     Suppress header line\n"
 "\n"
 "   -A, --query=QUERY, --socket=QUERY\n"
 "       QUERY := {all|inet|tcp|udp|raw|unix|unix_dgram|unix_stream|unix_seqpacket|packet|netlink}[,QUERY]\n"
@@ -3760,6 +3755,7 @@ static const struct option long_opts[] = {
 	{ "contexts", 0, 0, 'z' },
 	{ "net", 1, 0, 'N' },
 	{ "kill", 0, 0, 'K' },
+	{ "no-header", 0, 0, 'H' },
 	{ 0 }
 
 };
@@ -3774,7 +3770,7 @@ int main(int argc, char *argv[])
 	int ch;
 	int state_filter = 0;
 
-	while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spbEf:miA:D:F:vVzZN:K",
+	while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spbEf:miA:D:F:vVzZN:KH",
 				 long_opts, NULL)) != EOF) {
 		switch (ch) {
 		case 'n':
@@ -3959,6 +3955,9 @@ int main(int argc, char *argv[])
 		case 'K':
 			current_filter.kill = 1;
 			break;
+		case 'H':
+			show_header = 0;
+			break;
 		case 'h':
 			help();
 		case '?':
@@ -4084,19 +4083,23 @@ int main(int argc, char *argv[])
 
 	addr_width = addrp_width - serv_width - 1;
 
-	if (netid_width)
-		printf("%-*s ", netid_width, "Netid");
-	if (state_width)
-		printf("%-*s ", state_width, "State");
-	printf("%-6s %-6s ", "Recv-Q", "Send-Q");
+	if (show_header) {
+		if (netid_width)
+			printf("%-*s ", netid_width, "Netid");
+		if (state_width)
+			printf("%-*s ", state_width, "State");
+		printf("%-6s %-6s ", "Recv-Q", "Send-Q");
+	}
 
 	/* Make enough space for the local/remote port field */
 	addr_width -= 13;
 	serv_width += 13;
 
-	printf("%*s:%-*s %*s:%-*s\n",
-	       addr_width, "Local Address", serv_width, "Port",
-	       addr_width, "Peer Address", serv_width, "Port");
+	if (show_header) {
+		printf("%*s:%-*s %*s:%-*s\n",
+		       addr_width, "Local Address", serv_width, "Port",
+		       addr_width, "Peer Address", serv_width, "Port");
+	}
 
 	fflush(stdout);
 

schema/bridge_fdb_schema.json

@@ -0,0 +1,62 @@
+{
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "description": "bridge fdb show",
+    "type": "array",
+    "items": {
+        "type": "object",
+        "properties": {
+            "dev": {
+                "type": "string"
+            },
+            "dst": {
+                "description" : "host name or ip address",
+                "type": "string"
+            },
+            "flags": {
+                "type": "array",
+                "items": {
+                    "enum": ["self", "master", "router", "offload"]
+                },
+                "uniqueItems": true
+            },
+            "linkNetNsId": {
+                "type": "integer"
+            },
+            "mac": {
+                "type": "string"
+            },
+            "master": {
+                "type": "string"
+            },
+            "opCode": {
+                "description" : "used to indicate fdb entry del",
+                "enum": ["deleted"]
+            },
+            "port": {
+                "type": "integer"
+            },
+            "state": {
+                "description" : "permanent, static, stale, state=#x",
+                "type": "string"
+            },
+            "updated": {
+                "type": "integer"
+            },
+            "used": {
+                "type": "integer"
+            },
+            "viaIf": {
+                "type": "string"
+            },
+            "viaIfIndex": {
+                "type": "integer"
+            },
+            "vlan": {
+                "type": "integer"
+            },
+            "vni": {
+                "type": "integer"
+            }
+        }
+    }
+}

tc/e_bpf.c

@@ -56,8 +56,8 @@ static int parse_bpf(struct exec_util *eu, int argc, char **argv)
 	char **argv_run = argv_default, **envp_run, *tmp;
 	int ret, i, env_old, env_num, env_map;
 	const char *bpf_uds_name = NULL;
-	int fds[BPF_SCM_MAX_FDS];
-	struct bpf_map_aux aux;
+	int fds[BPF_SCM_MAX_FDS] = {};
+	struct bpf_map_aux aux = {};
 
 	if (argc == 0)
 		return 0;
@@ -115,9 +115,6 @@ static int parse_bpf(struct exec_util *eu, int argc, char **argv)
 		return -1;
 	}
 
-	memset(fds, 0, sizeof(fds));
-	memset(&aux, 0, sizeof(aux));
-
 	ret = bpf_recv_map_fds(bpf_uds_name, fds, &aux, ARRAY_SIZE(fds));
 	if (ret < 0) {
 		fprintf(stderr, "bpf: Could not receive fds!\n");

tc/em_canid.c

@@ -106,8 +106,8 @@ static int canid_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 	if (args == NULL)
 		return PARSE_ERR(args, "canid: missing arguments");
 
-	rules.rules_raw = malloc(sizeof(struct can_filter) * rules.rules_capacity);
-	memset(rules.rules_raw, 0, sizeof(struct can_filter) * rules.rules_capacity);
+	rules.rules_raw = calloc(rules.rules_capacity,
+				 sizeof(struct can_filter));
 
 	do {
 		if (!bstrcmp(args, "sff")) {

tc/em_cmp.c

@@ -44,9 +44,7 @@ static int cmp_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 	int align, opnd = 0;
 	unsigned long offset = 0, layer = TCF_LAYER_NETWORK, mask = 0, value = 0;
 	int offset_present = 0, value_present = 0;
-	struct tcf_em_cmp cmp;
-
-	memset(&cmp, 0, sizeof(cmp));
+	struct tcf_em_cmp cmp = {};
 
 #define PARSE_ERR(CARG, FMT, ARGS...) \
 	em_parse_error(EINVAL, args, CARG, &cmp_ematch_util, FMT, ##ARGS)

tc/em_ipset.c

@@ -198,11 +198,9 @@ static void ipset_print_usage(FILE *fd)
 static int ipset_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 			    struct bstr *args)
 {
-	struct xt_set_info set_info;
+	struct xt_set_info set_info = {};
 	int ret;
 
-	memset(&set_info, 0, sizeof(set_info));
-
 #define PARSE_ERR(CARG, FMT, ARGS...) \
 	em_parse_error(EINVAL, args, CARG, &ipset_ematch_util, FMT, ##ARGS)
 

tc/em_meta.c

@@ -361,11 +361,9 @@ static int meta_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 {
 	int opnd;
 	struct bstr *a;
-	struct tcf_meta_hdr meta_hdr;
+	struct tcf_meta_hdr meta_hdr = {};
 	unsigned long lvalue = 0, rvalue = 0;
 
-	memset(&meta_hdr, 0, sizeof(meta_hdr));
-
 	if (args == NULL)
 		return PARSE_ERR(args, "meta: missing arguments");
 
@@ -485,8 +483,9 @@ static int print_object(FILE *fd, struct tcf_meta_val *obj, struct rtattr *rta)
 				if (RTA_PAYLOAD(rta) < sizeof(__u32))
 					goto size_mismatch;
 
-				fprintf(fd, " mask 0x%08x",
-				    rta_getattr_u32(rta));
+				if (rta_getattr_u32(rta))
+					fprintf(fd, " mask 0x%08x",
+						rta_getattr_u32(rta));
 			}
 			break;
 	}

tc/em_nbyte.c

@@ -44,9 +44,7 @@ static int nbyte_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 	struct bstr *needle = args;
 	unsigned long offset = 0, layer = TCF_LAYER_NETWORK;
 	int offset_present = 0;
-	struct tcf_em_nbyte nb;
-
-	memset(&nb, 0, sizeof(nb));
+	struct tcf_em_nbyte nb = {};
 
 #define PARSE_ERR(CARG, FMT, ARGS...) \
 	em_parse_error(EINVAL, args, CARG, &nbyte_ematch_util, FMT, ##ARGS)

tc/em_u32.c

@@ -39,9 +39,7 @@ static int u32_parse_eopt(struct nlmsghdr *n, struct tcf_ematch_hdr *hdr,
 	struct bstr *a;
 	int align, nh_len;
 	unsigned long key, mask, offmask = 0, offset;
-	struct tc_u32_key u_key;
-
-	memset(&u_key, 0, sizeof(u_key));
+	struct tc_u32_key u_key = {};
 
 #define PARSE_ERR(CARG, FMT, ARGS...) \
 	em_parse_error(EINVAL, args, CARG, &u32_ematch_util, FMT, ##ARGS)

tc/f_flow.c

@@ -133,7 +133,6 @@ out:
 static int flow_parse_opt(struct filter_util *fu, char *handle,
 			  int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_police tp;
 	struct tcmsg *t = NLMSG_DATA(n);
 	struct rtattr *tail;
 	__u32 mask = ~0U, xor = 0;
@@ -141,8 +140,6 @@ static int flow_parse_opt(struct filter_util *fu, char *handle,
 	__u32 mode = FLOW_MODE_MAP;
 	__u32 tmp;
 
-	memset(&tp, 0, sizeof(tp));
-
 	if (handle) {
 		if (get_u32(&t->tcm_handle, handle, 0)) {
 			fprintf(stderr, "Illegal \"handle\"\n");

tc/f_flower.c

@@ -203,10 +203,9 @@ static int flower_parse_opt(struct filter_util *qu, char *handle,
 		} else if (matches(*argv, "skip_sw") == 0) {
 			flags |= TCA_CLS_FLAGS_SKIP_SW;
 		} else if (matches(*argv, "indev") == 0) {
-			char ifname[IFNAMSIZ];
+			char ifname[IFNAMSIZ] = {};
 
 			NEXT_ARG();
-			memset(ifname, 0, sizeof(ifname));
 			strncpy(ifname, *argv, sizeof(ifname) - 1);
 			addattrstrz(n, MAX_MSG, TCA_FLOWER_INDEV, ifname);
 		} else if (matches(*argv, "dst_mac") == 0) {

tc/f_fw.c

@@ -33,14 +33,11 @@ static void explain(void)
 
 static int fw_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_police tp;
 	struct tcmsg *t = NLMSG_DATA(n);
 	struct rtattr *tail;
 	__u32 mask = 0;
 	int mask_set = 0;
 
-	memset(&tp, 0, sizeof(tp));
-
 	if (handle) {
 		char *slash;
 
@@ -94,9 +91,8 @@ static int fw_parse_opt(struct filter_util *qu, char *handle, int argc, char **a
 			}
 			continue;
 		} else if (strcmp(*argv, "indev") == 0) {
-			char d[IFNAMSIZ+1];
+			char d[IFNAMSIZ+1] = {};
 
-			memset(d, 0, sizeof(d));
 			argc--;
 			argv++;
 			if (argc < 1) {

tc/f_route.c

@@ -36,14 +36,11 @@ static void explain(void)
 
 static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_police tp;
 	struct tcmsg *t = NLMSG_DATA(n);
 	struct rtattr *tail;
 	__u32 fh = 0xFFFF8000;
 	__u32 order = 0;
 
-	memset(&tp, 0, sizeof(tp));
-
 	if (handle) {
 		if (get_u32(&t->tcm_handle, handle, 0)) {
 			fprintf(stderr, "Illegal \"handle\"\n");

tc/f_rsvp.c

@@ -173,15 +173,11 @@ done:
 static int rsvp_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
 {
 	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
-	struct tc_rsvp_pinfo pinfo;
-	struct tc_police tp;
+	struct tc_rsvp_pinfo pinfo = {};
 	struct tcmsg *t = NLMSG_DATA(n);
 	int pinfo_ok = 0;
 	struct rtattr *tail;
 
-	memset(&pinfo, 0, sizeof(pinfo));
-	memset(&tp, 0, sizeof(tp));
-
 	if (handle) {
 		if (get_u32(&t->tcm_handle, handle, 0)) {
 			fprintf(stderr, "Illegal \"handle\"\n");

tc/f_u32.c

@@ -988,7 +988,7 @@ static int u32_parse_opt(struct filter_util *qu, char *handle,
 	struct {
 		struct tc_u32_sel sel;
 		struct tc_u32_key keys[128];
-	} sel;
+	} sel = {};
 	struct tcmsg *t = NLMSG_DATA(n);
 	struct rtattr *tail;
 	int sel_ok = 0, terminal_ok = 0;
@@ -997,8 +997,6 @@ static int u32_parse_opt(struct filter_util *qu, char *handle,
 	__u32 order = 0;
 	__u32 flags = 0;
 
-	memset(&sel, 0, sizeof(sel));
-
 	if (handle && get_u32_handle(&t->tcm_handle, handle)) {
 		fprintf(stderr, "Illegal filter ID\n");
 		return -1;
@@ -1093,12 +1091,11 @@ static int u32_parse_opt(struct filter_util *qu, char *handle,
 		} else if (strcmp(*argv, "sample") == 0) {
 			__u32 hash;
 			unsigned int divisor = 0x100;
-
 			struct {
 				struct tc_u32_sel sel;
 				struct tc_u32_key keys[4];
-			} sel2;
-			memset(&sel2, 0, sizeof(sel2));
+			} sel2 = {};
+
 			NEXT_ARG();
 			if (parse_selector(&argc, &argv, &sel2.sel, n)) {
 				fprintf(stderr, "Illegal \"sample\"\n");
@@ -1125,9 +1122,8 @@ static int u32_parse_opt(struct filter_util *qu, char *handle,
 			sample_ok = 1;
 			continue;
 		} else if (strcmp(*argv, "indev") == 0) {
-			char ind[IFNAMSIZ + 1];
+			char ind[IFNAMSIZ + 1] = {};
 
-			memset(ind, 0, sizeof(ind));
 			argc--;
 			argv++;
 			if (argc < 1) {

tc/m_action.c

@@ -126,9 +126,8 @@ noexist:
 		goto restart_s;
 	}
 #endif
-	a = malloc(sizeof(*a));
+	a = calloc(1, sizeof(*a));
 	if (a) {
-		memset(a, 0, sizeof(*a));
 		strncpy(a->id, "noact", 15);
 		a->parse_aopt = parse_noaopt;
 		a->print_aopt = print_noaopt;
@@ -395,13 +394,10 @@ static int tc_action_gd(int cmd, unsigned int flags, int *argc_p, char ***argv_p
 		struct tcamsg           t;
 		char                    buf[MAX_MSG];
 	} req = {
-		.n = {
-			.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
-			.nlmsg_flags = NLM_F_REQUEST | flags,
-			.nlmsg_type = cmd,
-		},
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
 		.t.tca_family = AF_UNSPEC,
-		.buf = { 0 }
 	};
 
 	argc -= 1;
@@ -491,23 +487,18 @@ static int tc_action_modify(int cmd, unsigned int flags, int *argc_p, char ***ar
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ret = 0;
-
-	struct rtattr *tail;
 	struct {
 		struct nlmsghdr         n;
 		struct tcamsg           t;
 		char                    buf[MAX_MSG];
 	} req = {
-		.n = {
-			.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
-			.nlmsg_flags = NLM_F_REQUEST | flags,
-			.nlmsg_type = cmd,
-		},
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
 		.t.tca_family = AF_UNSPEC,
-		.buf = { 0 }
 	};
+	struct rtattr *tail = NLMSG_TAIL(&req.n);
 
-	tail = NLMSG_TAIL(&req.n);
 	argc -= 1;
 	argv += 1;
 	if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
@@ -540,7 +531,6 @@ static int tc_act_list_or_flush(int argc, char **argv, int event)
 	} req = {
 		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
 		.t.tca_family = AF_UNSPEC,
-		.buf = { 0 }
 	};
 
 	tail = NLMSG_TAIL(&req.n);

tc/m_bpf.c

@@ -63,7 +63,7 @@ static int bpf_parse_opt(struct action_util *a, int *ptr_argc, char ***ptr_argv,
 			 int tca_id, struct nlmsghdr *n)
 {
 	const char *bpf_obj = NULL, *bpf_uds_name = NULL;
-	struct tc_act_bpf parm;
+	struct tc_act_bpf parm = { .action = TC_ACT_PIPE };
 	bool seen_run = false;
 	struct rtattr *tail;
 	int argc, ret = 0;
@@ -104,9 +104,6 @@ opt_bpf:
 		NEXT_ARG_FWD();
 	}
 
-	memset(&parm, 0, sizeof(parm));
-	parm.action = TC_ACT_PIPE;
-
 	if (argc) {
 		if (matches(*argv, "reclassify") == 0) {
 			parm.action = TC_ACT_RECLASSIFY;

tc/m_csum.c

@@ -85,15 +85,13 @@ static int
 parse_csum(struct action_util *a, int *argc_p,
 	   char ***argv_p, int tca_id, struct nlmsghdr *n)
 {
-	struct tc_csum sel;
+	struct tc_csum sel = {};
 
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ok = 0;
 	struct rtattr *tail;
 
-	memset(&sel, 0, sizeof(sel));
-
 	while (argc > 0) {
 		if (matches(*argv, "csum") == 0) {
 			NEXT_ARG();

tc/m_ematch.c

@@ -177,9 +177,7 @@ static int parse_tree(struct nlmsghdr *n, struct ematch *tree)
 
 	for (t = tree; t; t = t->next) {
 		struct rtattr *tail = NLMSG_TAIL(n);
-		struct tcf_ematch_hdr hdr = {
-			.flags = t->relation
-		};
+		struct tcf_ematch_hdr hdr = { .flags = t->relation };
 
 		if (t->inverted)
 			hdr.flags |= TCF_EM_INVERT;

tc/m_gact.c

@@ -97,16 +97,13 @@ parse_gact(struct action_util *a, int *argc_p, char ***argv_p,
 	char **argv = *argv_p;
 	int ok = 0;
 	int action = TC_POLICE_RECLASSIFY;
-	struct tc_gact p;
+	struct tc_gact p = { .action = TC_POLICE_RECLASSIFY };
 #ifdef CONFIG_GACT_PROB
 	int rd = 0;
 	struct tc_gact_p pp;
 #endif
 	struct rtattr *tail;
 
-	memset(&p, 0, sizeof(p));
-	p.action = TC_POLICE_RECLASSIFY;
-
 	if (argc < 0)
 		return -1;
 

tc/m_ife.c

@@ -56,7 +56,7 @@ static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ok = 0;
-	struct tc_ife p;
+	struct tc_ife p = { .action = TC_ACT_PIPE };	/* good default */
 	struct rtattr *tail;
 	struct rtattr *tail2;
 	char dbuf[ETH_ALEN];
@@ -69,9 +69,6 @@ static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
 	char *daddr = NULL;
 	char *saddr = NULL;
 
-	memset(&p, 0, sizeof(p));
-	p.action = TC_ACT_PIPE;	/* good default */
-
 	if (argc <= 0)
 		return -1;
 

tc/m_ipt.c

@@ -164,16 +164,11 @@ get_target_name(const char *name)
 	return NULL;
 #endif
 
-	new_name = malloc(strlen(name) + 1);
-	lname = malloc(strlen(name) + 1);
-	if (new_name)
-		memset(new_name, '\0', strlen(name) + 1);
-	else
+	new_name = calloc(1, strlen(name) + 1);
+	lname = calloc(1, strlen(name) + 1);
+	if (!new_name)
 		exit_error(PARAMETER_PROBLEM, "get_target_name");
-
-	if (lname)
-		memset(lname, '\0', strlen(name) + 1);
-	else
+	if (!lname)
 		exit_error(PARAMETER_PROBLEM, "get_target_name");
 
 	strcpy(new_name, name);

tc/m_mirred.c

@@ -69,12 +69,9 @@ parse_egress(struct action_util *a, int *argc_p, char ***argv_p,
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ok = 0, iok = 0, mirror = 0, redir = 0;
-	struct tc_mirred p;
+	struct tc_mirred p = {};
 	struct rtattr *tail;
-	char d[16];
-
-	memset(d, 0, sizeof(d)-1);
-	memset(&p, 0, sizeof(struct tc_mirred));
+	char d[16] = {};
 
 	while (argc > 0) {
 

tc/m_nat.c

@@ -84,15 +84,13 @@ bad_val:
 static int
 parse_nat(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
 {
-	struct tc_nat sel;
+	struct tc_nat sel = {};
 
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ok = 0;
 	struct rtattr *tail;
 
-	memset(&sel, 0, sizeof(sel));
-
 	while (argc > 0) {
 		if (matches(*argv, "nat") == 0) {
 			NEXT_ARG();

tc/m_pedit.c

@@ -107,9 +107,8 @@ reg:
 	return p;
 
 noexist:
-	p = malloc(sizeof(*p));
+	p = calloc(1, sizeof(*p));
 	if (p) {
-		memset(p, 0, sizeof(*p));
 		strncpy(p->id, str, sizeof(p->id) - 1);
 		p->parse_peopt = pedit_parse_nopopt;
 		goto reg;
@@ -392,7 +391,7 @@ done:
 
 static int parse_munge(int *argc_p, char ***argv_p, struct tc_pedit_sel *sel)
 {
-	struct tc_pedit_key tkey;
+	struct tc_pedit_key tkey = {};
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int res = -1;
@@ -400,8 +399,6 @@ static int parse_munge(int *argc_p, char ***argv_p, struct tc_pedit_sel *sel)
 	if (argc <= 0)
 		return -1;
 
-	memset(&tkey, 0, sizeof(tkey));
-
 	if (matches(*argv, "offset") == 0) {
 		NEXT_ARG();
 		res = parse_offset(&argc, &argv, sel, &tkey);
@@ -442,15 +439,13 @@ int parse_pedit(struct action_util *a, int *argc_p, char ***argv_p, int tca_id,
 	struct {
 		struct tc_pedit_sel sel;
 		struct tc_pedit_key keys[MAX_OFFS];
-	} sel;
+	} sel = {};
 
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	int ok = 0, iok = 0;
 	struct rtattr *tail;
 
-	memset(&sel, 0, sizeof(sel));
-
 	while (argc > 0) {
 		if (pedit_debug > 1)
 			fprintf(stderr, "while pedit (%d:%s)\n", argc, *argv);

tc/m_police.c

@@ -127,7 +127,7 @@ int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p,
 	char **argv = *argv_p;
 	int res = -1;
 	int ok = 0;
-	struct tc_police p;
+	struct tc_police p = { .action = TC_POLICE_RECLASSIFY };
 	__u32 rtab[256];
 	__u32 ptab[256];
 	__u32 avrate = 0;
@@ -138,9 +138,6 @@ int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p,
 	int Rcell_log =  -1, Pcell_log = -1;
 	struct rtattr *tail;
 
-	memset(&p, 0, sizeof(p));
-	p.action = TC_POLICE_RECLASSIFY;
-
 	if (a) /* new way of doing things */
 		NEXT_ARG();
 

tc/q_atm.c

@@ -47,7 +47,7 @@ static void explain(void)
 static int atm_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
    struct nlmsghdr *n)
 {
-	struct sockaddr_atmsvc addr;
+	struct sockaddr_atmsvc addr = {};
 	struct atm_qos qos;
 	struct atm_sap sap;
 	unsigned char hdr[MAX_HDR_LEN];
@@ -58,7 +58,6 @@ static int atm_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
 	int set_clip = 0;
 	int s;
 
-	memset(&addr, 0, sizeof(addr));
 	(void) text2qos("aal5,ubr:sdu=9180,rx:none", &qos, 0);
 	(void) text2sap("blli:l2=iso8802", &sap, 0);
 	while (argc > 0) {

tc/q_cbq.c

@@ -49,8 +49,8 @@ static void explain1(char *arg)
 
 static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_ratespec r;
-	struct tc_cbq_lssopt lss;
+	struct tc_ratespec r = {};
+	struct tc_cbq_lssopt lss = {};
 	__u32 rtab[256];
 	unsigned mpu = 0, avpkt = 0, allot = 0;
 	unsigned short overhead = 0;
@@ -59,9 +59,6 @@ static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nl
 	int ewma_log =  -1;
 	struct rtattr *tail;
 
-	memset(&lss, 0, sizeof(lss));
-	memset(&r, 0, sizeof(r));
-
 	while (argc > 0) {
 		if (matches(*argv, "bandwidth") == 0 ||
 		    matches(*argv, "rate") == 0) {
@@ -183,11 +180,10 @@ static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nl
 static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int wrr_ok = 0, fopt_ok = 0;
-	struct tc_ratespec r;
-	struct tc_cbq_lssopt lss;
-	struct tc_cbq_wrropt wrr;
-	struct tc_cbq_fopt fopt;
-	struct tc_cbq_ovl ovl;
+	struct tc_ratespec r = {};
+	struct tc_cbq_lssopt lss = {};
+	struct tc_cbq_wrropt wrr = {};
+	struct tc_cbq_fopt fopt = {};
 	__u32 rtab[256];
 	unsigned mpu = 0;
 	int cell_log =  -1;
@@ -198,12 +194,6 @@ static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, str
 	unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
 	struct rtattr *tail;
 
-	memset(&r, 0, sizeof(r));
-	memset(&lss, 0, sizeof(lss));
-	memset(&wrr, 0, sizeof(wrr));
-	memset(&fopt, 0, sizeof(fopt));
-	memset(&ovl, 0, sizeof(ovl));
-
 	while (argc > 0) {
 		if (matches(*argv, "rate") == 0) {
 			NEXT_ARG();

tc/q_choke.c

@@ -34,7 +34,7 @@ static void explain(void)
 static int choke_parse_opt(struct qdisc_util *qu, int argc, char **argv,
 			   struct nlmsghdr *n)
 {
-	struct tc_red_qopt opt;
+	struct tc_red_qopt opt = {};
 	unsigned int burst = 0;
 	unsigned int avpkt = 1000;
 	double probability = 0.02;
@@ -45,8 +45,6 @@ static int choke_parse_opt(struct qdisc_util *qu, int argc, char **argv,
 	__u32 max_P;
 	struct rtattr *tail;
 
-	memset(&opt, 0, sizeof(opt));
-
 	while (argc > 0) {
 		if (strcmp(*argv, "limit") == 0) {
 			NEXT_ARG();

tc/q_codel.c

@@ -175,7 +175,7 @@ static int codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 static int codel_print_xstats(struct qdisc_util *qu, FILE *f,
 			      struct rtattr *xstats)
 {
-	struct tc_codel_xstats _st, *st;
+	struct tc_codel_xstats _st = {}, *st;
 
 	SPRINT_BUF(b1);
 
@@ -184,7 +184,6 @@ static int codel_print_xstats(struct qdisc_util *qu, FILE *f,
 
 	st = RTA_DATA(xstats);
 	if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
-		memset(&_st, 0, sizeof(_st));
 		memcpy(&_st, st, RTA_PAYLOAD(xstats));
 		st = &_st;
 	}

tc/q_dsmark.c

@@ -128,7 +128,6 @@ static int dsmark_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 	struct rtattr *tb[TCA_DSMARK_MAX+1];
 
 	if (!opt) return 0;
-	memset(tb, 0, sizeof(tb));
 	parse_rtattr(tb, TCA_DSMARK_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt));
 	if (tb[TCA_DSMARK_MASK]) {
 		if (!RTA_PAYLOAD(tb[TCA_DSMARK_MASK]))

tc/q_fifo.c

@@ -31,9 +31,7 @@ static void explain(void)
 static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int ok = 0;
-	struct tc_fifo_qopt opt;
-
-	memset(&opt, 0, sizeof(opt));
+	struct tc_fifo_qopt opt = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "limit") == 0) {

tc/q_fq_codel.c

@@ -220,7 +220,7 @@ static int fq_codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt
 static int fq_codel_print_xstats(struct qdisc_util *qu, FILE *f,
 				 struct rtattr *xstats)
 {
-	struct tc_fq_codel_xstats _st, *st;
+	struct tc_fq_codel_xstats _st = {}, *st;
 
 	SPRINT_BUF(b1);
 
@@ -229,7 +229,6 @@ static int fq_codel_print_xstats(struct qdisc_util *qu, FILE *f,
 
 	st = RTA_DATA(xstats);
 	if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
-		memset(&_st, 0, sizeof(_st));
 		memcpy(&_st, st, RTA_PAYLOAD(xstats));
 		st = &_st;
 	}

tc/q_hfsc.c

@@ -73,9 +73,7 @@ explain1(char *arg)
 static int
 hfsc_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_hfsc_qopt qopt;
-
-	memset(&qopt, 0, sizeof(qopt));
+	struct tc_hfsc_qopt qopt = {};
 
 	while (argc > 0) {
 		if (matches(*argv, "default") == 0) {
@@ -146,15 +144,10 @@ static int
 hfsc_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
 		     struct nlmsghdr *n)
 {
-	struct tc_service_curve rsc, fsc, usc;
-	int rsc_ok, fsc_ok, usc_ok;
+	struct tc_service_curve rsc = {}, fsc = {}, usc = {};
+	int rsc_ok = 0, fsc_ok = 0, usc_ok = 0;
 	struct rtattr *tail;
 
-	memset(&rsc, 0, sizeof(rsc));
-	memset(&fsc, 0, sizeof(fsc));
-	memset(&usc, 0, sizeof(usc));
-	rsc_ok = fsc_ok = usc_ok = 0;
-
 	while (argc > 0) {
 		if (matches(*argv, "rt") == 0) {
 			NEXT_ARG();

tc/q_htb.c

@@ -63,14 +63,13 @@ static void explain1(char *arg)
 static int htb_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	unsigned int direct_qlen = ~0U;
-	struct tc_htb_glob opt;
+	struct tc_htb_glob opt = {
+		.rate2quantum = 10,
+		.version = 3,
+	};
 	struct rtattr *tail;
 	unsigned int i; char *p;
 
-	memset(&opt, 0, sizeof(opt));
-	opt.rate2quantum = 10;
-	opt.version = 3;
-
 	while (argc > 0) {
 		if (matches(*argv, "r2q") == 0) {
 			NEXT_ARG();
@@ -113,19 +112,17 @@ static int htb_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nl
 static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int ok = 0;
-	struct tc_htb_opt opt;
+	struct tc_htb_opt opt = {};
 	__u32 rtab[256], ctab[256];
 	unsigned buffer = 0, cbuffer = 0;
 	int cell_log =  -1, ccell_log = -1;
-	unsigned int mtu;
+	unsigned int mtu = 1600; /* eth packet len */
 	unsigned short mpu = 0;
 	unsigned short overhead = 0;
 	unsigned int linklayer  = LINKLAYER_ETHERNET; /* Assume ethernet */
 	struct rtattr *tail;
 	__u64 ceil64 = 0, rate64 = 0;
 
-	memset(&opt, 0, sizeof(opt)); mtu = 1600; /* eth packet len */
-
 	while (argc > 0) {
 		if (matches(*argv, "prio") == 0) {
 			NEXT_ARG();

tc/q_netem.c

@@ -175,23 +175,17 @@ static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
 	int dist_size = 0;
 	struct rtattr *tail;
 	struct tc_netem_qopt opt = { .limit = 1000 };
-	struct tc_netem_corr cor;
-	struct tc_netem_reorder reorder;
-	struct tc_netem_corrupt corrupt;
+	struct tc_netem_corr cor = {};
+	struct tc_netem_reorder reorder = {};
+	struct tc_netem_corrupt corrupt = {};
 	struct tc_netem_gimodel gimodel;
 	struct tc_netem_gemodel gemodel;
-	struct tc_netem_rate rate;
+	struct tc_netem_rate rate = {};
 	__s16 *dist_data = NULL;
 	__u16 loss_type = NETEM_LOSS_UNSPEC;
-	int present[__TCA_NETEM_MAX];
+	int present[__TCA_NETEM_MAX] = {};
 	__u64 rate64 = 0;
 
-	memset(&cor, 0, sizeof(cor));
-	memset(&reorder, 0, sizeof(reorder));
-	memset(&corrupt, 0, sizeof(corrupt));
-	memset(&rate, 0, sizeof(rate));
-	memset(present, 0, sizeof(present));
-
 	for ( ; argc > 0; --argc, ++argv) {
 		if (matches(*argv, "limit") == 0) {
 			NEXT_ARG();

tc/q_red.c

@@ -35,7 +35,7 @@ static void explain(void)
 
 static int red_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
-	struct tc_red_qopt opt;
+	struct tc_red_qopt opt = {};
 	unsigned int burst = 0;
 	unsigned int avpkt = 0;
 	double probability = 0.02;
@@ -45,8 +45,6 @@ static int red_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nl
 	__u32 max_P;
 	struct rtattr *tail;
 
-	memset(&opt, 0, sizeof(opt));
-
 	while (argc > 0) {
 		if (strcmp(*argv, "limit") == 0) {
 			NEXT_ARG();

tc/q_sfb.c

@@ -51,17 +51,16 @@ static int get_prob(__u32 *val, const char *arg)
 static int sfb_parse_opt(struct qdisc_util *qu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
-	struct tc_sfb_qopt opt;
+	struct tc_sfb_qopt opt = {
+		.rehash_interval = 600*1000,
+		.warmup_time = 60*1000,
+		.penalty_rate = 10,
+		.penalty_burst = 20,
+		.increment = (SFB_MAX_PROB + 1000) / 2000,
+		.decrement = (SFB_MAX_PROB + 10000) / 20000,
+	};
 	struct rtattr *tail;
 
-	memset(&opt, 0, sizeof(opt));
-	opt.rehash_interval = 600*1000;
-	opt.warmup_time = 60*1000;
-	opt.penalty_rate = 10;
-	opt.penalty_burst = 20;
-	opt.increment = (SFB_MAX_PROB + 1000) / 2000;
-	opt.decrement = (SFB_MAX_PROB + 10000) / 20000;
-
 	while (argc > 0) {
 	    if (strcmp(*argv, "rehash") == 0) {
 			NEXT_ARG();

tc/q_sfq.c

@@ -38,14 +38,12 @@ static void explain(void)
 static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int ok = 0, red = 0;
-	struct tc_sfq_qopt_v1 opt;
+	struct tc_sfq_qopt_v1 opt = {};
 	unsigned int burst = 0;
 	int wlog;
 	unsigned int avpkt = 1000;
 	double probability = 0.02;
 
-	memset(&opt, 0, sizeof(opt));
-
 	while (argc > 0) {
 		if (strcmp(*argv, "quantum") == 0) {
 			NEXT_ARG();

tc/q_tbf.c

@@ -39,7 +39,7 @@ static void explain1(const char *arg, const char *val)
 static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int ok = 0;
-	struct tc_tbf_qopt opt;
+	struct tc_tbf_qopt opt = {};
 	__u32 rtab[256];
 	__u32 ptab[256];
 	unsigned buffer = 0, mtu = 0, mpu = 0, latency = 0;
@@ -49,8 +49,6 @@ static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nl
 	struct rtattr *tail;
 	__u64 rate64 = 0, prate64 = 0;
 
-	memset(&opt, 0, sizeof(opt));
-
 	while (argc > 0) {
 		if (matches(*argv, "limit") == 0) {
 			NEXT_ARG();

tc/tc.c

@@ -133,11 +133,9 @@ reg:
 	return q;
 
 noexist:
-	q = malloc(sizeof(*q));
+	q = calloc(1, sizeof(*q));
 	if (q) {
-
-		memset(q, 0, sizeof(*q));
-		q->id = strcpy(malloc(strlen(str)+1), str);
+		q->id = strdup(str);
 		q->parse_qopt = parse_noqopt;
 		q->print_qopt = print_noqopt;
 		goto reg;
@@ -177,9 +175,8 @@ reg:
 	filter_list = q;
 	return q;
 noexist:
-	q = malloc(sizeof(*q));
+	q = calloc(1, sizeof(*q));
 	if (q) {
-		memset(q, 0, sizeof(*q));
 		strncpy(q->id, str, 15);
 		q->parse_fopt = parse_nofopt;
 		q->print_fopt = print_nofopt;

tc/tc_bpf.c

@@ -54,6 +54,10 @@
 #define AF_ALG 38
 #endif
 
+#ifndef EM_BPF
+#define EM_BPF 247
+#endif
+
 #ifdef HAVE_ELF
 static int bpf_obj_open(const char *path, enum bpf_prog_type type,
 			const char *sec, bool verbose);
@@ -86,9 +90,8 @@ static int bpf(int cmd, union bpf_attr *attr, unsigned int size)
 static int bpf_map_update(int fd, const void *key, const void *value,
 			  uint64_t flags)
 {
-	union bpf_attr attr;
+	union bpf_attr attr = {};
 
-	memset(&attr, 0, sizeof(attr));
 	attr.map_fd = fd;
 	attr.key = bpf_ptr_to_u64(key);
 	attr.value = bpf_ptr_to_u64(value);
@@ -109,12 +112,10 @@ static int bpf_parse_string(char *arg, bool from_file, __u16 *bpf_len,
 		FILE *fp;
 
 		tmp_len = sizeof("4096,") + BPF_MAXINSNS * op_len;
-		tmp_string = malloc(tmp_len);
+		tmp_string = calloc(1, tmp_len);
 		if (tmp_string == NULL)
 			return -ENOMEM;
 
-		memset(tmp_string, 0, tmp_len);
-
 		fp = fopen(arg, "r");
 		if (fp == NULL) {
 			perror("Cannot fopen");
@@ -243,7 +244,7 @@ static int bpf_map_selfcheck_pinned(int fd, const struct bpf_elf_map *map,
 				    int length)
 {
 	char file[PATH_MAX], buff[4096];
-	struct bpf_elf_map tmp, zero;
+	struct bpf_elf_map tmp = {}, zero = {};
 	unsigned int val;
 	FILE *fp;
 
@@ -255,7 +256,6 @@ static int bpf_map_selfcheck_pinned(int fd, const struct bpf_elf_map *map,
 		return -EIO;
 	}
 
-	memset(&tmp, 0, sizeof(tmp));
 	while (fgets(buff, sizeof(buff), fp)) {
 		if (sscanf(buff, "map_type:\t%u", &val) == 1)
 			tmp.type = val;
@@ -274,7 +274,6 @@ static int bpf_map_selfcheck_pinned(int fd, const struct bpf_elf_map *map,
 	if (!memcmp(&tmp, map, length)) {
 		return 0;
 	} else {
-		memset(&zero, 0, sizeof(zero));
 		/* If kernel doesn't have eBPF-related fdinfo, we cannot do much,
 		 * so just accept it. We know we do have an eBPF fd and in this
 		 * case, everything is 0. It is guaranteed that no such map exists
@@ -465,7 +464,7 @@ done:
 
 static int bpf_obj_get(const char *pathname)
 {
-	union bpf_attr attr;
+	union bpf_attr attr = {};
 	char tmp[PATH_MAX];
 
 	if (strlen(pathname) > 2 && pathname[0] == 'm' &&
@@ -475,7 +474,6 @@ static int bpf_obj_get(const char *pathname)
 		pathname = tmp;
 	}
 
-	memset(&attr, 0, sizeof(attr));
 	attr.pathname = bpf_ptr_to_u64(pathname);
 
 	return bpf(BPF_OBJ_GET, &attr, sizeof(attr));
@@ -806,9 +804,8 @@ static int bpf_map_create(enum bpf_map_type type, uint32_t size_key,
 			  uint32_t size_value, uint32_t max_elem,
 			  uint32_t flags)
 {
-	union bpf_attr attr;
+	union bpf_attr attr = {};
 
-	memset(&attr, 0, sizeof(attr));
 	attr.map_type = type;
 	attr.key_size = size_key;
 	attr.value_size = size_value;
@@ -822,9 +819,8 @@ static int bpf_prog_load(enum bpf_prog_type type, const struct bpf_insn *insns,
 			 size_t size_insns, const char *license, char *log,
 			 size_t size_log)
 {
-	union bpf_attr attr;
+	union bpf_attr attr = {};
 
-	memset(&attr, 0, sizeof(attr));
 	attr.prog_type = type;
 	attr.insns = bpf_ptr_to_u64(insns);
 	attr.insn_cnt = size_insns / sizeof(struct bpf_insn);
@@ -841,9 +837,8 @@ static int bpf_prog_load(enum bpf_prog_type type, const struct bpf_insn *insns,
 
 static int bpf_obj_pin(int fd, const char *pathname)
 {
-	union bpf_attr attr;
+	union bpf_attr attr = {};
 
-	memset(&attr, 0, sizeof(attr));
 	attr.pathname = bpf_ptr_to_u64(pathname);
 	attr.bpf_fd = fd;
 
@@ -1628,7 +1623,7 @@ static bool bpf_pinning_reserved(uint32_t pinning)
 static void bpf_hash_init(struct bpf_elf_ctx *ctx, const char *db_file)
 {
 	struct bpf_hash_entry *entry;
-	char subpath[PATH_MAX];
+	char subpath[PATH_MAX] = {};
 	uint32_t pinning;
 	FILE *fp;
 	int ret;
@@ -1637,7 +1632,6 @@ static void bpf_hash_init(struct bpf_elf_ctx *ctx, const char *db_file)
 	if (!fp)
 		return;
 
-	memset(subpath, 0, sizeof(subpath));
 	while ((ret = bpf_read_pin_mapping(fp, &pinning, subpath))) {
 		if (ret == -1) {
 			fprintf(stderr, "Database %s is corrupted at: %s\n",
@@ -1690,7 +1684,8 @@ static void bpf_hash_destroy(struct bpf_elf_ctx *ctx)
 static int bpf_elf_check_ehdr(const struct bpf_elf_ctx *ctx)
 {
 	if (ctx->elf_hdr.e_type != ET_REL ||
-	    ctx->elf_hdr.e_machine != 0 ||
+	    (ctx->elf_hdr.e_machine != EM_NONE &&
+	     ctx->elf_hdr.e_machine != EM_BPF) ||
 	    ctx->elf_hdr.e_version != EV_CURRENT) {
 		fprintf(stderr, "ELF format error, ELF file not for eBPF?\n");
 		return -EINVAL;
@@ -1864,16 +1859,14 @@ static int
 bpf_map_set_send(int fd, struct sockaddr_un *addr, unsigned int addr_len,
 		 const struct bpf_map_data *aux, unsigned int entries)
 {
-	struct bpf_map_set_msg msg;
+	struct bpf_map_set_msg msg = {
+		.aux.uds_ver = BPF_SCM_AUX_VER,
+		.aux.num_ent = entries,
+	};
 	int *cmsg_buf, min_fd;
 	char *amsg_buf;
 	int i;
 
-	memset(&msg, 0, sizeof(msg));
-
-	msg.aux.uds_ver = BPF_SCM_AUX_VER;
-	msg.aux.num_ent = entries;
-
 	strncpy(msg.aux.obj_name, aux->obj, sizeof(msg.aux.obj_name));
 	memcpy(&msg.aux.obj_st, aux->st, sizeof(msg.aux.obj_st));
 
@@ -1947,8 +1940,13 @@ bpf_map_set_recv(int fd, int *fds,  struct bpf_map_aux *aux,
 int bpf_send_map_fds(const char *path, const char *obj)
 {
 	struct bpf_elf_ctx *ctx = &__ctx;
-	struct sockaddr_un addr;
-	struct bpf_map_data bpf_aux;
+	struct sockaddr_un addr = { .sun_family = AF_UNIX };
+	struct bpf_map_data bpf_aux = {
+		.fds = ctx->map_fds,
+		.ent = ctx->maps,
+		.st  = &ctx->stat,
+		.obj = obj,
+	};
 	int fd, ret;
 
 	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
@@ -1958,8 +1956,6 @@ int bpf_send_map_fds(const char *path, const char *obj)
 		return -1;
 	}
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sun_family = AF_UNIX;
 	strncpy(addr.sun_path, path, sizeof(addr.sun_path));
 
 	ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
@@ -1969,13 +1965,6 @@ int bpf_send_map_fds(const char *path, const char *obj)
 		return -1;
 	}
 
-	memset(&bpf_aux, 0, sizeof(bpf_aux));
-
-	bpf_aux.fds = ctx->map_fds;
-	bpf_aux.ent = ctx->maps;
-	bpf_aux.st  = &ctx->stat;
-	bpf_aux.obj = obj;
-
 	ret = bpf_map_set_send(fd, &addr, sizeof(addr), &bpf_aux,
 			       bpf_maps_count(ctx));
 	if (ret < 0)
@@ -1990,7 +1979,7 @@ int bpf_send_map_fds(const char *path, const char *obj)
 int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux,
 		     unsigned int entries)
 {
-	struct sockaddr_un addr;
+	struct sockaddr_un addr = { .sun_family = AF_UNIX };
 	int fd, ret;
 
 	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
@@ -2000,8 +1989,6 @@ int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux,
 		return -1;
 	}
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sun_family = AF_UNIX;
 	strncpy(addr.sun_path, path, sizeof(addr.sun_path));
 
 	ret = bind(fd, (struct sockaddr *)&addr, sizeof(addr));

tc/tc_class.c

@@ -61,21 +61,16 @@ static int tc_class_modify(int cmd, unsigned int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct tcmsg		t;
 		char			buf[4096];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.t.tcm_family = AF_UNSPEC,
+	};
 	struct qdisc_util *q = NULL;
-	struct tc_estimator est;
-	char  d[16];
-	char  k[16];
-
-	memset(&req, 0, sizeof(req));
-	memset(&est, 0, sizeof(est));
-	memset(d, 0, sizeof(d));
-	memset(k, 0, sizeof(k));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.t.tcm_family = AF_UNSPEC;
+	struct tc_estimator est = {};
+	char  d[16] = {};
+	char  k[16] = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
@@ -168,9 +163,8 @@ __u32 filter_classid;
 static void graph_node_add(__u32 parent_id, __u32 id, void *data,
 		int len)
 {
-	struct graph_node *node = malloc(sizeof(struct graph_node));
+	struct graph_node *node = calloc(1, sizeof(struct graph_node));
 
-	memset(node, 0, sizeof(*node));
 	node->id         = id;
 	node->parent_id  = parent_id;
 
@@ -225,7 +219,7 @@ static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list,
 {
 	struct hlist_node *n, *tmp_cls;
 	char cls_id_str[256] = {};
-	struct rtattr *tb[TCA_MAX + 1] = {};
+	struct rtattr *tb[TCA_MAX + 1];
 	struct qdisc_util *q;
 	char str[100] = {};
 
@@ -310,7 +304,7 @@ int print_class(const struct sockaddr_nl *who,
 	FILE *fp = (FILE *)arg;
 	struct tcmsg *t = NLMSG_DATA(n);
 	int len = n->nlmsg_len;
-	struct rtattr *tb[TCA_MAX + 1] = {};
+	struct rtattr *tb[TCA_MAX + 1];
 	struct qdisc_util *q;
 	char abuf[256];
 
@@ -395,14 +389,10 @@ int print_class(const struct sockaddr_nl *who,
 
 static int tc_class_list(int argc, char **argv)
 {
-	struct tcmsg t;
-	char d[16];
+	struct tcmsg t = { .tcm_family = AF_UNSPEC };
+	char d[16] = {};
 	char buf[1024] = {0};
 
-	memset(&t, 0, sizeof(t));
-	t.tcm_family = AF_UNSPEC;
-	memset(d, 0, sizeof(d));
-
 	filter_qdisc = 0;
 	filter_classid = 0;
 

tc/tc_exec.c

@@ -71,9 +71,8 @@ reg:
 
 	return eu;
 noexist:
-	eu = malloc(sizeof(*eu));
+	eu = calloc(1, sizeof(*eu));
 	if (eu) {
-		memset(eu, 0, sizeof(*eu));
 		strncpy(eu->id, name, sizeof(eu->id) - 1);
 		eu->parse_eopt = parse_noeopt;
 		goto reg;
@@ -85,7 +84,7 @@ noexist:
 int do_exec(int argc, char **argv)
 {
 	struct exec_util *eu;
-	char kind[16];
+	char kind[16] = {};
 
 	if (argc < 1) {
 		fprintf(stderr, "No command given, try \"tc exec help\".\n");
@@ -97,7 +96,6 @@ int do_exec(int argc, char **argv)
 		return 0;
 	}
 
-	memset(kind, 0, sizeof(kind));
 	strncpy(kind, *argv, sizeof(kind) - 1);
 
 	eu = get_exec_kind(kind);

tc/tc_filter.c

@@ -47,26 +47,20 @@ static int tc_filter_modify(int cmd, unsigned int flags, int argc, char **argv)
 		struct nlmsghdr	n;
 		struct tcmsg		t;
 		char			buf[MAX_MSG];
-	} req;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.t.tcm_family = AF_UNSPEC,
+	};
 	struct filter_util *q = NULL;
 	__u32 prio = 0;
 	__u32 protocol = 0;
 	int protocol_set = 0;
 	char *fhandle = NULL;
-	char  d[16];
-	char  k[16];
-	struct tc_estimator est;
-
-	memset(&req, 0, sizeof(req));
-	memset(&est, 0, sizeof(est));
-	memset(d, 0, sizeof(d));
-	memset(k, 0, sizeof(k));
-	memset(&req, 0, sizeof(req));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.t.tcm_family = AF_UNSPEC;
+	char  d[16] = {};
+	char  k[16] = {};
+	struct tc_estimator est = {};
 
 	if (cmd == RTM_NEWTFILTER && flags & NLM_F_CREATE)
 		protocol = htons(ETH_P_ALL);
@@ -213,7 +207,6 @@ int print_filter(const struct sockaddr_nl *who,
 		return -1;
 	}
 
-	memset(tb, 0, sizeof(tb));
 	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
 
 	if (tb[TCA_KIND] == NULL) {
@@ -278,16 +271,12 @@ int print_filter(const struct sockaddr_nl *who,
 
 static int tc_filter_list(int argc, char **argv)
 {
-	struct tcmsg t;
-	char d[16];
+	struct tcmsg t = { .tcm_family = AF_UNSPEC };
+	char d[16] = {};
 	__u32 prio = 0;
 	__u32 protocol = 0;
 	char *fhandle = NULL;
 
-	memset(&t, 0, sizeof(t));
-	t.tcm_family = AF_UNSPEC;
-	memset(d, 0, sizeof(d));
-
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
 			NEXT_ARG();

tc/tc_qdisc.c

@@ -49,25 +49,19 @@ static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv)
 	struct {
 		struct tc_sizespec	szopts;
 		__u16			*data;
-	} stab;
-	char  d[16];
-	char  k[16];
+	} stab = {};
+	char  d[16] = {};
+	char  k[16] = {};
 	struct {
 		struct nlmsghdr	n;
 		struct tcmsg		t;
 		char			buf[TCA_BUF_MAX];
-	} req;
-
-	memset(&req, 0, sizeof(req));
-	memset(&stab, 0, sizeof(stab));
-	memset(&est, 0, sizeof(est));
-	memset(&d, 0, sizeof(d));
-	memset(&k, 0, sizeof(k));
-
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
-	req.n.nlmsg_type = cmd;
-	req.t.tcm_family = AF_UNSPEC;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
+		.n.nlmsg_flags = NLM_F_REQUEST | flags,
+		.n.nlmsg_type = cmd,
+		.t.tcm_family = AF_UNSPEC,
+	};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
@@ -227,7 +221,6 @@ int print_qdisc(const struct sockaddr_nl *who,
 	if (filter_ifindex && filter_ifindex != t->tcm_ifindex)
 		return 0;
 
-	memset(tb, 0, sizeof(tb));
 	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
 
 	if (tb[TCA_KIND] == NULL) {
@@ -287,12 +280,8 @@ int print_qdisc(const struct sockaddr_nl *who,
 
 static int tc_qdisc_list(int argc, char **argv)
 {
-	struct tcmsg t;
-	char d[16];
-
-	memset(&t, 0, sizeof(t));
-	t.tcm_family = AF_UNSPEC;
-	memset(&d, 0, sizeof(d));
+	struct tcmsg t = { .tcm_family = AF_UNSPEC };
+	char d[16] = {};
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {

tc/tc_stab.c

@@ -53,9 +53,7 @@ int parse_size_table(int *argcp, char ***argvp, struct tc_sizespec *sp)
 {
 	char **argv = *argvp;
 	int argc = *argcp;
-	struct tc_sizespec s;
-
-	memset(&s, 0, sizeof(s));
+	struct tc_sizespec s = {};
 
 	NEXT_ARG();
 	if (matches(*argv, "help") == 0) {

tc/tc_util.c

@@ -580,10 +580,9 @@ void print_tcstats_attr(FILE *fp, struct rtattr *tb[], char *prefix, struct rtat
 	}
 	/* backward compatibility */
 	if (tb[TCA_STATS]) {
-		struct tc_stats st;
+		struct tc_stats st = {};
 
 		/* handle case where kernel returns more/less than we know about */
-		memset(&st, 0, sizeof(st));
 		memcpy(&st, RTA_DATA(tb[TCA_STATS]), MIN(RTA_PAYLOAD(tb[TCA_STATS]), sizeof(st)));
 
 		fprintf(fp, "%sSent %llu bytes %u pkts (dropped %u, overlimits %u) ",