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ip rule: add suppress_{prefixlength,ifgroup} options

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function                                             old     new   delta
iprule_modify                                        816     887     +71
print_rule                                           610     680     +70
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 141/0)             Total: 141 bytes

Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Stefan Tomanek 2017-06-13 19:06:09 +02:00 committed by Denys Vlasenko
parent 6683d1cbb4
commit 192dce4b84
1 changed files with 46 additions and 27 deletions
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73
networking/libiproute/iprule.c
View File

@ -17,25 +17,32 @@
#include <netinet/ip.h>
#include <arpa/inet.h>
/* from <linux/fib_rules.h>: */
#define FRA_SUPPRESS_IFGROUP 13
#define FRA_SUPPRESS_PREFIXLEN 14
#include "ip_common.h" /* #include "libbb.h" is inside */
#include "rt_names.h"
#include "utils.h"
/*
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ip rule [ list | add | del ] SELECTOR ACTION\n");
fprintf(stderr, "SELECTOR := [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK ]\n");
fprintf(stderr, " [ dev STRING ] [ pref NUMBER ]\n");
fprintf(stderr, "ACTION := [ table TABLE_ID ] [ nat ADDRESS ]\n");
fprintf(stderr, " [ prohibit | reject | unreachable ]\n");
fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n");
exit(-1);
}
*/
/* If you add stuff here, update iprule_full_usage */
static const char keywords[] ALIGN1 =
"from\0""to\0""preference\0""order\0""priority\0"
"tos\0""fwmark\0""realms\0""table\0""lookup\0"
"suppress_prefixlength\0""suppress_ifgroup\0"
"dev\0""iif\0""nat\0""map-to\0""type\0""help\0"
;
#define keyword_preference (keywords + sizeof("from") + sizeof("to"))
#define keyword_fwmark (keyword_preference + sizeof("preference") + sizeof("order") + sizeof("priority") + sizeof("tos"))
#define keyword_realms (keyword_fwmark + sizeof("fwmark"))
#define keyword_suppress_prefixlength (keyword_realms + sizeof("realms") + sizeof("table") + sizeof("lookup"))
#define keyword_suppress_ifgroup (keyword_suppress_prefixlength + sizeof("suppress_prefixlength"))
enum {
ARG_from = 1, ARG_to, ARG_preference, ARG_order, ARG_priority,
ARG_tos, ARG_fwmark, ARG_realms, ARG_table, ARG_lookup,
ARG_suppress_prefixlength, ARG_suppress_ifgroup,
ARG_dev, ARG_iif, ARG_nat, ARG_map_to, ARG_type, ARG_help,
};
static int FAST_FUNC print_rule(const struct sockaddr_nl *who UNUSED_PARAM,
struct nlmsghdr *n, void *arg UNUSED_PARAM)
@ -119,6 +126,17 @@ static int FAST_FUNC print_rule(const struct sockaddr_nl *who UNUSED_PARAM,
else if (r->rtm_table)
printf("lookup %s ", rtnl_rttable_n2a(r->rtm_table));
if (tb[FRA_SUPPRESS_PREFIXLEN]) {
int pl = *(uint32_t*)RTA_DATA(tb[FRA_SUPPRESS_PREFIXLEN]);
if (pl != -1)
printf("%s %d ", keyword_suppress_prefixlength, pl);
}
if (tb[FRA_SUPPRESS_IFGROUP]) {
int grp = *(uint32_t*)RTA_DATA(tb[FRA_SUPPRESS_IFGROUP]);
if (grp != -1)
printf("%s %d ", keyword_suppress_ifgroup, grp);
}
if (tb[RTA_FLOW]) {
uint32_t to = *(uint32_t*)RTA_DATA(tb[RTA_FLOW]);
uint32_t from = to>>16;
@ -174,15 +192,6 @@ static int iprule_list(char **argv)
/* Return value becomes exitcode. It's okay to not return at all */
static int iprule_modify(int cmd, char **argv)
{
static const char keywords[] ALIGN1 =
"from\0""to\0""preference\0""order\0""priority\0"
"tos\0""fwmark\0""realms\0""table\0""lookup\0""dev\0"
"iif\0""nat\0""map-to\0""type\0""help\0";
enum {
ARG_from = 1, ARG_to, ARG_preference, ARG_order, ARG_priority,
ARG_tos, ARG_fwmark, ARG_realms, ARG_table, ARG_lookup, ARG_dev,
ARG_iif, ARG_nat, ARG_map_to, ARG_type, ARG_help
};
bool table_ok = 0;
struct rtnl_handle rth;
struct {
@ -232,7 +241,7 @@ static int iprule_modify(int cmd, char **argv)
) {
uint32_t pref;
NEXT_ARG();
pref = get_u32(*argv, "preference");
pref = get_u32(*argv, keyword_preference);
addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
} else if (key == ARG_tos) {
uint32_t tos;
@ -243,13 +252,13 @@ static int iprule_modify(int cmd, char **argv)
} else if (key == ARG_fwmark) {
uint32_t fwmark;
NEXT_ARG();
fwmark = get_u32(*argv, "fwmark");
fwmark = get_u32(*argv, keyword_fwmark);
addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
} else if (key == ARG_realms) {
uint32_t realm;
NEXT_ARG();
if (get_rt_realms(&realm, *argv))
invarg_1_to_2(*argv, "realms");
invarg_1_to_2(*argv, keyword_realms);
addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
} else if (key == ARG_table ||
key == ARG_lookup
@ -265,6 +274,16 @@ static int iprule_modify(int cmd, char **argv)
addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
}
table_ok = 1;
} else if (key == ARG_suppress_prefixlength) {
int prefix_length;
NEXT_ARG();
prefix_length = get_u32(*argv, keyword_suppress_prefixlength);
addattr32(&req.n, sizeof(req), FRA_SUPPRESS_PREFIXLEN, prefix_length);
} else if (key == ARG_suppress_ifgroup) {
int grp;
NEXT_ARG();
grp = get_u32(*argv, keyword_suppress_ifgroup);
addattr32(&req.n, sizeof(req), FRA_SUPPRESS_IFGROUP, grp);
} else if (key == ARG_dev ||
key == ARG_iif
) {