ip: add a new parameter -Numeric

Add a new parameter '-Numeric' to show the number of protocol, scope,
dsfield, etc directly instead of converting it to human readable name.
Do the same on tc and ss.

This patch is based on David Ahern's previous patch.

Suggested-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>

include/utils.h

@@ -34,6 +34,7 @@ extern int timestamp_short;
 extern const char * _SL_;
 extern int max_flush_loops;
 extern int batch_mode;
+extern int numeric;
 extern bool do_all;
 
 #ifndef CONFDIR

ip/ip.c

@@ -36,6 +36,7 @@ int timestamp;
 int force;
 int max_flush_loops = 10;
 int batch_mode;
+int numeric;
 bool do_all;
 
 struct rtnl_handle rth = { .fd = -1 };
@@ -57,7 +58,8 @@ static void usage(void)
 		"                    -4 | -6 | -I | -D | -M | -B | -0 |\n"
 		"                    -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
 		"                    -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
-		"                    -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
+		"                    -rc[vbuf] [size] | -n[etns] name | -N[umeric] | -a[ll] |\n"
+		"                    -c[olor]}\n");
 	exit(-1);
 }
 
@@ -289,6 +291,8 @@ int main(int argc, char **argv)
 			NEXT_ARG();
 			if (netns_switch(argv[1]))
 				exit(-1);
+		} else if (matches(opt, "-Numeric") == 0) {
+			++numeric;
 		} else if (matches(opt, "-all") == 0) {
 			do_all = true;
 		} else {

ip/rtm_map.c

@@ -23,6 +23,12 @@
 
 char *rtnl_rtntype_n2a(int id, char *buf, int len)
 {
+
+	if (numeric) {
+		snprintf(buf, len, "%d", id);
+		return buf;
+	}
+
 	switch (id) {
 	case RTN_UNSPEC:
 		return "none";

lib/inet_proto.c

@@ -32,7 +32,7 @@ const char *inet_proto_n2a(int proto, char *buf, int len)
 		return ncache;
 
 	pe = getprotobynumber(proto);
-	if (pe) {
+	if (pe && !numeric) {
 		if (icache != -1)
 			free(ncache);
 		icache = proto;

lib/ll_proto.c

@@ -92,7 +92,7 @@ const char * ll_proto_n2a(unsigned short id, char *buf, int len)
 
 	id = ntohs(id);
 
-        for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
+        for (i=0; !numeric && i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
                  if (llproto_names[i].id == id)
 			return llproto_names[i].name;
 	}

lib/ll_types.c

@@ -24,6 +24,7 @@
 #include <linux/sockios.h>
 
 #include "rt_names.h"
+#include "utils.h"
 
 const char * ll_type_n2a(int type, char *buf, int len)
 {
@@ -112,7 +113,7 @@ __PF(VOID,void)
 #undef __PF
 
         int i;
-        for (i=0; i<sizeof(arphrd_names)/sizeof(arphrd_names[0]); i++) {
+        for (i=0; !numeric && i<sizeof(arphrd_names)/sizeof(arphrd_names[0]); i++) {
                  if (arphrd_names[i].type == type)
 			return arphrd_names[i].name;
 	}

lib/rt_names.c

@@ -27,6 +27,8 @@
 
 #define NAME_MAX_LEN 512
 
+int numeric;
+
 struct rtnl_hash_entry {
 	struct rtnl_hash_entry	*next;
 	const char		*name;
@@ -180,7 +182,7 @@ static void rtnl_rtprot_initialize(void)
 
 const char *rtnl_rtprot_n2a(int id, char *buf, int len)
 {
-	if (id < 0 || id >= 256) {
+	if (id < 0 || id >= 256 || numeric) {
 		snprintf(buf, len, "%u", id);
 		return buf;
 	}
@@ -246,7 +248,7 @@ static void rtnl_rtscope_initialize(void)
 
 const char *rtnl_rtscope_n2a(int id, char *buf, int len)
 {
-	if (id < 0 || id >= 256) {
+	if (id < 0 || id >= 256 || numeric) {
 		snprintf(buf, len, "%d", id);
 		return buf;
 	}
@@ -311,7 +313,7 @@ static void rtnl_rtrealm_initialize(void)
 
 const char *rtnl_rtrealm_n2a(int id, char *buf, int len)
 {
-	if (id < 0 || id >= 256) {
+	if (id < 0 || id >= 256 || numeric) {
 		snprintf(buf, len, "%d", id);
 		return buf;
 	}
@@ -419,7 +421,7 @@ const char *rtnl_rttable_n2a(__u32 id, char *buf, int len)
 	entry = rtnl_rttable_hash[id & 255];
 	while (entry && entry->id != id)
 		entry = entry->next;
-	if (entry)
+	if (!numeric && entry)
 		return entry->name;
 	snprintf(buf, len, "%u", id);
 	return buf;
@@ -484,7 +486,7 @@ const char *rtnl_dsfield_n2a(int id, char *buf, int len)
 		if (!rtnl_rtdsfield_init)
 			rtnl_rtdsfield_initialize();
 	}
-	if (rtnl_rtdsfield_tab[id])
+	if (!numeric && rtnl_rtdsfield_tab[id])
 		return rtnl_rtdsfield_tab[id];
 	snprintf(buf, len, "0x%02x", id);
 	return buf;
@@ -584,7 +586,7 @@ const char *rtnl_group_n2a(int id, char *buf, int len)
 	if (!rtnl_group_init)
 		rtnl_group_initialize();
 
-	for (i = 0; i < 256; i++) {
+	for (i = 0; !numeric && i < 256; i++) {
 		entry = rtnl_group_hash[i];
 
 		while (entry) {
@@ -633,8 +635,8 @@ static void nl_proto_initialize(void)
 
 const char *nl_proto_n2a(int id, char *buf, int len)
 {
-	if (id < 0 || id >= 256) {
+	if (id < 0 || id >= 256 || numeric) {
-		snprintf(buf, len, "%u", id);
+		snprintf(buf, len, "%d", id);
 		return buf;
 	}
 

man/man8/ip.8

@@ -47,6 +47,7 @@ ip \- show / manipulate routing, network devices, interfaces and tunnels
 \fB\-t\fR[\fIimestamp\fR] |
 \fB\-ts\fR[\fIhort\fR] |
 \fB\-n\fR[\fIetns\fR] name |
+\fB\-N\fR[\fIumeric\fR] |
 \fB\-a\fR[\fIll\fR] |
 \fB\-c\fR[\fIolor\fR] |
 \fB\-br\fR[\fIief\fR] |
@@ -174,6 +175,11 @@ to
 .RI "-n[etns] " NETNS " [ " OPTIONS " ] " OBJECT " { " COMMAND " | "
 .BR help " }"
 
+.TP
+.BR "\-N" , " \-Numeric"
+Print the number of protocol, scope, dsfield, etc directly instead of
+converting it to human readable name.
+
 .TP
 .BR "\-a" , " \-all"
 executes specified command over all objects, it depends if command

man/man8/tc.8

@@ -119,6 +119,7 @@ tc \- show / manipulate traffic control settings
 .IR OPTIONS " := {"
 \fB[ -force ] -b\fR[\fIatch\fR] \fB[ filename ] \fR|
 \fB[ \fB-n\fR[\fIetns\fR] name \fB] \fR|
+\fB[ \fB-N\fR[\fIumeric\fR] \fB] \fR|
 \fB[ \fB-nm \fR| \fB-nam\fR[\fIes\fR] \fB] \fR|
 \fB[ \fR{ \fB-cf \fR| \fB-c\fR[\fIonf\fR] \fR} \fB[ filename ] \fB] \fR
 \fB[ -t\fR[imestamp\fR] \fB\] \fR| \fB[ -t\fR[short\fR] \fR| \fB[
@@ -707,6 +708,11 @@ to
 .RI "-n[etns] " NETNS " [ " OPTIONS " ] " OBJECT " { " COMMAND " | "
 .BR help " }"
 
+.TP
+.BR "\-N" , " \-Numeric"
+Print the number of protocol, scope, dsfield, etc directly instead of
+converting it to human readable name.
+
 .TP
 .BR "\-cf" , " \-conf " <FILENAME>
 specifies path to the config file. This option is used in conjunction with other options (e.g.

misc/ss.c

@@ -106,7 +106,6 @@ static int security_get_initial_context(char *name,  char **context)
 }
 #endif
 
-static int resolve_services = 1;
 int preferred_family = AF_UNSPEC;
 static int show_options;
 int show_details;
@@ -121,6 +120,7 @@ static int follow_events;
 static int sctp_ino;
 static int show_tipcinfo;
 static int show_tos;
+int numeric;
 int oneline;
 
 enum col_id {
@@ -1553,7 +1553,7 @@ static const char *resolve_service(int port)
 		return buf;
 	}
 
-	if (!resolve_services)
+	if (numeric)
 		goto do_numeric;
 
 	if (dg_proto == RAW_PROTO)
@@ -4296,14 +4296,11 @@ static int netlink_show_one(struct filter *f,
 
 	sock_state_print(&st);
 
-	if (resolve_services)
 	prot_name = nl_proto_n2a(prot, prot_buf, sizeof(prot_buf));
-	else
-		prot_name = int_to_str(prot, prot_buf);
 
 	if (pid == -1) {
 		procname[0] = '*';
-	} else if (resolve_services) {
+	} else if (!numeric) {
 		int done = 0;
 
 		if (!pid) {
@@ -5050,7 +5047,7 @@ int main(int argc, char *argv[])
 				 long_opts, NULL)) != EOF) {
 		switch (ch) {
 		case 'n':
-			resolve_services = 0;
+			numeric = 1;
 			break;
 		case 'r':
 			resolve_hosts = 1;
@@ -5268,7 +5265,7 @@ int main(int argc, char *argv[])
 	filter_states_set(&current_filter, state_filter);
 	filter_merge_defaults(&current_filter);
 
-	if (resolve_services && resolve_hosts &&
+	if (!numeric && resolve_hosts &&
 	    (current_filter.dbs & (UNIX_DBM|INET_L4_DBM)))
 		init_service_resolver();
 

tc/tc.c

@@ -43,6 +43,7 @@ bool use_names;
 int json;
 int color;
 int oneline;
+int numeric;
 
 static char *conf_file;
 
@@ -200,7 +201,7 @@ static void usage(void)
 		"		    action | monitor | exec }\n"
 		"       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[aw] |\n"
 		"		    -o[neline] | -j[son] | -p[retty] | -c[olor]\n"
-		"		    -b[atch] [filename] | -n[etns] name |\n"
+		"		    -b[atch] [filename] | -n[etns] name | -N[umeric] |\n"
 		"		     -nm | -nam[es] | { -cf | -conf } path }\n");
 }
 
@@ -486,6 +487,8 @@ int main(int argc, char **argv)
 			NEXT_ARG();
 			if (netns_switch(argv[1]))
 				return -1;
+		} else if (matches(argv[1], "-Numeric") == 0) {
+			++numeric;
 		} else if (matches(argv[1], "-names") == 0 ||
 				matches(argv[1], "-nm") == 0) {
 			use_names = true;