tc: enables this applet

function                                             old     new   delta
tc_main                                                -     946    +946
cbq_print_opt                                          -     517    +517
print_qdisc                                            -     475    +475
print_class                                            -     359    +359
llproto_names                                          -     264    +264
packed_usage                                       31853   32066    +213
ll_proto_a2n                                           -     112    +112
llproto_ids                                            -      86     +86
print_tc_classid                                       -      82     +82
static.objects                                         -      20     +20
static._q_                                             -      16     +16
applet_main                                         1564    1568      +4
print_filter                                           -       3      +3
applet_names                                        2708    2711      +3
------------------------------------------------------------------------------
(add/remove: 13/0 grow/shrink: 3/0 up/down: 3100/0)          Total: 3100 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 75 insertions, 31 deletions

diff --git a/networking/tc.c b/networking/tc.c
index 23abf636c..4e375a066 100644
--- a/networking/tc.c
+++ b/networking/tc.c
@@ -6,22 +6,20 @@
  *
  * Bernhard Reutner-Fischer adjusted for busybox
  */
+//config:config TC
+//config:       bool "tc (3.1 kb)"
+//config:       default y
+//config:       help
+//config:       Show / manipulate traffic control settings
+//config:
+//config:config FEATURE_TC_INGRESS
+//config:       bool "Enable ingress"
+//config:       default y
+//config:       depends on TC
 
-/* Was disabled in 2008 by Bernhard, not known why.
---//config:#config TC
---//config:#    bool "tc"
---//config:#    default y
---//config:#    help
---//config:#      Show / manipulate traffic control settings
---//config:#
---//config:#config FEATURE_TC_INGRESS
---//config:#    default y
---//config:#    depends on TC
---
---//applet:IF_TC(APPLET(tc, BB_DIR_SBIN, BB_SUID_DROP))
---
---//kbuild:lib-$(CONFIG_TC) += tc.o
-*/
+//applet:IF_TC(APPLET(tc, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_TC) += tc.o
 
 //usage:#define tc_trivial_usage
 /* //usage: "[OPTIONS] OBJECT CMD [dev STRING]" */
@@ -52,6 +50,17 @@
 #include "libiproute/rt_names.h"
 #include <linux/pkt_sched.h> /* for the TC_H_* macros */
 
+/* This is the deprecated multiqueue interface */
+#ifndef TCA_PRIO_MAX
+enum
+{
+        TCA_PRIO_UNSPEC,
+        TCA_PRIO_MQ,
+        __TCA_PRIO_MAX
+};
+#define TCA_PRIO_MAX    (__TCA_PRIO_MAX - 1)
+#endif
+
 #define parse_rtattr_nested(tb, max, rta) \
         (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
 
@@ -184,11 +193,13 @@ static void print_rate(char *buf, int len, uint32_t rate)
         }
 }
 
+#if 0
 /* This is "pfifo_fast".  */
 static int prio_parse_opt(int argc, char **argv, struct nlmsghdr *n)
 {
         return 0;
 }
+#endif
 static int prio_print_opt(struct rtattr *opt)
 {
         int i;
@@ -211,11 +222,13 @@ static int prio_print_opt(struct rtattr *opt)
         return 0;
 }
 
+#if 0
 /* Class Based Queue */
 static int cbq_parse_opt(int argc, char **argv, struct nlmsghdr *n)
 {
         return 0;
 }
+#endif
 static int cbq_print_opt(struct rtattr *opt)
 {
         struct rtattr *tb[TCA_CBQ_MAX+1];
@@ -308,8 +321,10 @@ static int cbq_print_opt(struct rtattr *opt)
         return 0;
 }
 
-static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
-                                                struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
+static FAST_FUNC int print_qdisc(
+                const struct sockaddr_nl *who UNUSED_PARAM,
+                struct nlmsghdr *hdr,
+                void *arg UNUSED_PARAM)
 {
         struct tcmsg *msg = NLMSG_DATA(hdr);
         int len = hdr->nlmsg_len;
@@ -364,8 +379,10 @@ static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
         return 0;
 }
 
-static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
-                                                struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
+static FAST_FUNC int print_class(
+                const struct sockaddr_nl *who UNUSED_PARAM,
+                struct nlmsghdr *hdr,
+                void *arg UNUSED_PARAM)
 {
         struct tcmsg *msg = NLMSG_DATA(hdr);
         int len = hdr->nlmsg_len;
@@ -432,8 +449,10 @@ static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
         return 0;
 }
 
-static int print_filter(const struct sockaddr_nl *who UNUSED_PARAM,
-                                                struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
+static FAST_FUNC int print_filter(
+                const struct sockaddr_nl *who UNUSED_PARAM,
+                struct nlmsghdr *hdr UNUSED_PARAM,
+                void *arg UNUSED_PARAM)
 {
         return 0;
 }
@@ -451,6 +470,12 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                 "replace\0"
                 "show\0""list\0"
                 ;
+        enum {
+                CMD_add = 0, CMD_del, CMD_change,
+                CMD_link,
+                CMD_replace,
+                CMD_show
+        };
         static const char args[] ALIGN1 =
                 "dev\0" /* qdisc, class, filter */
                 "root\0" /* class, filter */
@@ -460,9 +485,15 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                 "classid\0" /* change: for class use "handle" */
                 "preference\0""priority\0""protocol\0" /* filter */
                 ;
-        enum { CMD_add = 0, CMD_del, CMD_change, CMD_link, CMD_replace, CMD_show };
-        enum { ARG_dev = 0, ARG_root, ARG_parent, ARG_qdisc,
-                        ARG_handle, ARG_classid, ARG_pref, ARG_prio, ARG_proto};
+        enum {
+                ARG_dev = 0,
+                ARG_root,
+                ARG_parent,
+                ARG_qdisc,
+                ARG_handle,
+                ARG_classid,
+                ARG_pref, ARG_prio, ARG_proto
+        };
         struct rtnl_handle rth;
         struct tcmsg msg;
         int ret, obj, cmd, arg;
@@ -487,9 +518,12 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                         invarg_1_to_2(*argv, argv[-1]);
                 argv++;
         }
+
         memset(&msg, 0, sizeof(msg));
-        msg.tcm_family = AF_UNSPEC;
+        if (AF_UNSPEC != 0)
+                msg.tcm_family = AF_UNSPEC;
         ll_init_map(&rth);
+
         while (*argv) {
                 arg = index_in_substrings(args, *argv);
                 if (arg == ARG_dev) {
@@ -526,7 +560,8 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                         msg.tcm_parent = TC_H_ROOT;
                         if (obj == OBJ_filter)
                                 filter_parent = TC_H_ROOT;
-                } else if (arg == ARG_parent) {
+                } else
+                if (arg == ARG_parent) {
                         uint32_t handle;
                         if (msg.tcm_parent)
                                 duparg(*argv, "parent");
@@ -535,23 +570,31 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                         msg.tcm_parent = handle;
                         if (obj == OBJ_filter)
                                 filter_parent = handle;
-                } else if (arg == ARG_handle) { /* filter::list */
+                } else
+                if (arg == ARG_handle) { /* filter::list */
                         if (msg.tcm_handle)
                                 duparg(*argv, "handle");
                         /* reject LONG_MIN || LONG_MAX */
                         /* TODO: for fw
                         slash = strchr(handle, '/');
                         if (slash != NULL)
-                                   *slash = '\0';
+                                *slash = '\0';
                          */
                         msg.tcm_handle = get_u32(*argv, "handle");
                         /* if (slash) {if (get_u32(uint32_t &mask, slash+1, NULL)) inv mask; addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
-                } else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
-                } else if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
+                } else
+                if (arg == ARG_classid
+                 && obj == OBJ_class
+                 && cmd == CMD_change
+                ) {
+                        /* TODO */
+                } else
+                if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
                         if (filter_prio)
                                 duparg(*argv, "priority");
                         filter_prio = get_u32(*argv, "priority");
-                } else if (arg == ARG_proto) { /* filter::list */
+                } else
+                if (arg == ARG_proto) { /* filter::list */
                         uint16_t tmp;
                         if (filter_proto)
                                 duparg(*argv, "protocol");
@@ -560,6 +603,7 @@ int tc_main(int argc UNUSED_PARAM, char **argv)
                         filter_proto = tmp;
                 }
         }
+
         if (cmd >= CMD_show) { /* show or list */
                 if (obj == OBJ_filter)
                         msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);