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de6ff15129
This is a backport from the busybox repository
(192dce4b84fb32346ebc5194de7daa5da3b8d1b4); it enables the use of the
suppress_{prefixlength,ifgroup} flags for policy routing rules.
Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
146 lines
5.7 KiB
Diff
146 lines
5.7 KiB
Diff
From dbac30c3784c267bbe44a2a3ebed4e827c8fe82a Mon Sep 17 00:00:00 2001
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From: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
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Date: Tue, 13 Jun 2017 19:06:09 +0200
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Subject: [PATCH] ip rule: add suppress_{prefixlength,ifgroup} options
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(cherry-picked from 192dce4b84fb32346ebc5194de7daa5da3b8d1b4)
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function old new delta
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iprule_modify 816 887 +71
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print_rule 610 680 +70
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------------------------------------------------------------------------------
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 141/0) Total: 141 bytes
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Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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---
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networking/libiproute/iprule.c | 73 ++++++++++++++++++++++++++----------------
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1 file changed, 46 insertions(+), 27 deletions(-)
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--- a/networking/libiproute/iprule.c
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+++ b/networking/libiproute/iprule.c
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@@ -17,25 +17,32 @@
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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+/* from <linux/fib_rules.h>: */
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+#define FRA_SUPPRESS_IFGROUP 13
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+#define FRA_SUPPRESS_PREFIXLEN 14
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+
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#include "ip_common.h" /* #include "libbb.h" is inside */
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#include "rt_names.h"
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#include "utils.h"
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-/*
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-static void usage(void) __attribute__((noreturn));
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-
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-static void usage(void)
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-{
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- fprintf(stderr, "Usage: ip rule [ list | add | del ] SELECTOR ACTION\n");
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- fprintf(stderr, "SELECTOR := [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK ]\n");
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- fprintf(stderr, " [ dev STRING ] [ pref NUMBER ]\n");
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- fprintf(stderr, "ACTION := [ table TABLE_ID ] [ nat ADDRESS ]\n");
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- fprintf(stderr, " [ prohibit | reject | unreachable ]\n");
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- fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
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- fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n");
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- exit(-1);
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-}
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-*/
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+/* If you add stuff here, update iprule_full_usage */
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+static const char keywords[] ALIGN1 =
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+ "from\0""to\0""preference\0""order\0""priority\0"
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+ "tos\0""fwmark\0""realms\0""table\0""lookup\0"
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+ "suppress_prefixlength\0""suppress_ifgroup\0"
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+ "dev\0""iif\0""nat\0""map-to\0""type\0""help\0"
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+ ;
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+#define keyword_preference (keywords + sizeof("from") + sizeof("to"))
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+#define keyword_fwmark (keyword_preference + sizeof("preference") + sizeof("order") + sizeof("priority") + sizeof("tos"))
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+#define keyword_realms (keyword_fwmark + sizeof("fwmark"))
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+#define keyword_suppress_prefixlength (keyword_realms + sizeof("realms") + sizeof("table") + sizeof("lookup"))
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+#define keyword_suppress_ifgroup (keyword_suppress_prefixlength + sizeof("suppress_prefixlength"))
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+enum {
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+ ARG_from = 1, ARG_to, ARG_preference, ARG_order, ARG_priority,
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+ ARG_tos, ARG_fwmark, ARG_realms, ARG_table, ARG_lookup,
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+ ARG_suppress_prefixlength, ARG_suppress_ifgroup,
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+ ARG_dev, ARG_iif, ARG_nat, ARG_map_to, ARG_type, ARG_help,
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+};
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static int FAST_FUNC print_rule(const struct sockaddr_nl *who UNUSED_PARAM,
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struct nlmsghdr *n, void *arg UNUSED_PARAM)
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@@ -119,6 +126,17 @@ static int FAST_FUNC print_rule(const st
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else if (r->rtm_table)
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printf("lookup %s ", rtnl_rttable_n2a(r->rtm_table));
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+ if (tb[FRA_SUPPRESS_PREFIXLEN]) {
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+ int pl = *(uint32_t*)RTA_DATA(tb[FRA_SUPPRESS_PREFIXLEN]);
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+ if (pl != -1)
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+ printf("%s %d ", keyword_suppress_prefixlength, pl);
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+ }
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+ if (tb[FRA_SUPPRESS_IFGROUP]) {
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+ int grp = *(uint32_t*)RTA_DATA(tb[FRA_SUPPRESS_IFGROUP]);
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+ if (grp != -1)
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+ printf("%s %d ", keyword_suppress_ifgroup, grp);
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+ }
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+
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if (tb[RTA_FLOW]) {
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uint32_t to = *(uint32_t*)RTA_DATA(tb[RTA_FLOW]);
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uint32_t from = to>>16;
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@@ -174,15 +192,6 @@ static int iprule_list(char **argv)
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/* Return value becomes exitcode. It's okay to not return at all */
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static int iprule_modify(int cmd, char **argv)
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{
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- static const char keywords[] ALIGN1 =
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- "from\0""to\0""preference\0""order\0""priority\0"
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- "tos\0""fwmark\0""realms\0""table\0""lookup\0""dev\0"
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- "iif\0""nat\0""map-to\0""type\0""help\0";
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- enum {
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- ARG_from = 1, ARG_to, ARG_preference, ARG_order, ARG_priority,
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- ARG_tos, ARG_fwmark, ARG_realms, ARG_table, ARG_lookup, ARG_dev,
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- ARG_iif, ARG_nat, ARG_map_to, ARG_type, ARG_help
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- };
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bool table_ok = 0;
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struct rtnl_handle rth;
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struct {
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@@ -232,7 +241,7 @@ static int iprule_modify(int cmd, char *
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) {
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uint32_t pref;
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NEXT_ARG();
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- pref = get_u32(*argv, "preference");
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+ pref = get_u32(*argv, keyword_preference);
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addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
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} else if (key == ARG_tos) {
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uint32_t tos;
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@@ -243,13 +252,13 @@ static int iprule_modify(int cmd, char *
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} else if (key == ARG_fwmark) {
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uint32_t fwmark;
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NEXT_ARG();
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- fwmark = get_u32(*argv, "fwmark");
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+ fwmark = get_u32(*argv, keyword_fwmark);
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addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
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} else if (key == ARG_realms) {
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uint32_t realm;
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NEXT_ARG();
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if (get_rt_realms(&realm, *argv))
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- invarg_1_to_2(*argv, "realms");
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+ invarg_1_to_2(*argv, keyword_realms);
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addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
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} else if (key == ARG_table ||
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key == ARG_lookup
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@@ -265,6 +274,16 @@ static int iprule_modify(int cmd, char *
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addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
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}
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table_ok = 1;
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+ } else if (key == ARG_suppress_prefixlength) {
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+ int prefix_length;
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+ NEXT_ARG();
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+ prefix_length = get_u32(*argv, keyword_suppress_prefixlength);
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+ addattr32(&req.n, sizeof(req), FRA_SUPPRESS_PREFIXLEN, prefix_length);
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+ } else if (key == ARG_suppress_ifgroup) {
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+ int grp;
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+ NEXT_ARG();
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+ grp = get_u32(*argv, keyword_suppress_ifgroup);
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+ addattr32(&req.n, sizeof(req), FRA_SUPPRESS_IFGROUP, grp);
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} else if (key == ARG_dev ||
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key == ARG_iif
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) {
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