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Message-Id: <20180221015348.32646-5-sharpd@cumulusnetworks.com>
Date: Tue, 20 Feb 2018 20:53:48 -0500
From: Donald Sharp <sharpd@...ulusnetworks.com>
To: netdev@...r.kernel.org, dsahern@...il.com
Subject: [PATCH iproute2-next 4/4] ip: Add ability to flush a rule based upon protocol
Add code to allow the `ip rule flush protocol XXX`
command to be accepted and properly handled.
Additionally modify the documentation to be correct
with these changes.
Signed-off-by: Donald Sharp <sharpd@...ulusnetworks.com>
---
ip/iprule.c | 25 ++++++++++++++++++-------
man/man8/ip-rule.8 | 18 +++++++++++++++++-
2 files changed, 35 insertions(+), 8 deletions(-)
diff --git a/ip/iprule.c b/ip/iprule.c
index fd242fee..b69413dd 100644
--- a/ip/iprule.c
+++ b/ip/iprule.c
@@ -47,6 +47,7 @@ static void usage(void)
" [ iif STRING ] [ oif STRING ] [ pref NUMBER ] [ l3mdev ]\n"
" [ uidrange NUMBER-NUMBER ]\n"
"ACTION := [ table TABLE_ID ]\n"
+ " [ protocol RPROTO ]\n"
" [ nat ADDRESS ]\n"
" [ realms [SRCREALM/]DSTREALM ]\n"
" [ goto NUMBER ]\n"
@@ -71,6 +72,8 @@ static struct
struct fib_rule_uid_range range;
inet_prefix src;
inet_prefix dst;
+ int protocol;
+ int protocolmask;
} filter;
static bool filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
@@ -398,6 +401,9 @@ static int flush_rule(const struct sockaddr_nl *who, struct nlmsghdr *n,
parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
+ if ((filter.protocol^frh->proto)&filter.protocolmask)
+ return 0;
+
if (tb[FRA_PRIORITY]) {
n->nlmsg_type = RTM_DELRULE;
n->nlmsg_flags = NLM_F_REQUEST;
@@ -422,12 +428,6 @@ static int iprule_list_flush_or_save(int argc, char **argv, int action)
if (af == AF_UNSPEC)
af = AF_INET;
- if (action != IPRULE_LIST && argc > 0) {
- fprintf(stderr, "\"ip rule %s\" does not take any arguments.\n",
- action == IPRULE_SAVE ? "save" : "flush");
- return -1;
- }
-
switch (action) {
case IPRULE_SAVE:
if (save_rule_prep())
@@ -515,7 +515,18 @@ static int iprule_list_flush_or_save(int argc, char **argv, int action)
NEXT_ARG();
if (get_prefix(&filter.src, *argv, af))
invarg("from value is invalid\n", *argv);
- } else {
+ } else if (matches(*argv, "protocol") == 0) {
+ __u32 prot;
+ NEXT_ARG();
+ filter.protocolmask = -1;
+ if (rtnl_rtprot_a2n(&prot, *argv)) {
+ if (strcmp(*argv, "all") != 0)
+ invarg("invalid \"protocol\"\n", *argv);
+ prot = 0;
+ filter.protocolmask = 0;
+ }
+ filter.protocol = prot;
+ } else{
if (matches(*argv, "dst") == 0 ||
matches(*argv, "to") == 0) {
NEXT_ARG();
diff --git a/man/man8/ip-rule.8 b/man/man8/ip-rule.8
index a5c47981..98b2573d 100644
--- a/man/man8/ip-rule.8
+++ b/man/man8/ip-rule.8
@@ -50,6 +50,8 @@ ip-rule \- routing policy database management
.IR ACTION " := [ "
.B table
.IR TABLE_ID " ] [ "
+.B protocol
+.IR RPROTO " ] [ "
.B nat
.IR ADDRESS " ] [ "
.B realms
@@ -240,6 +242,10 @@ The options preference and order are synonyms with priority.
the routing table identifier to lookup if the rule selector matches.
It is also possible to use lookup instead of table.
+.TP
+.BI protocol " RPROTO"
+the protocol who installed the rule in question.
+
.TP
.BI suppress_prefixlength " NUMBER"
reject routing decisions that have a prefix length of NUMBER or less.
@@ -275,7 +281,11 @@ updates, it flushes the routing cache with
.RE
.TP
.B ip rule flush - also dumps all the deleted rules.
-This command has no arguments.
+.RS
+.TP
+.BI protocol " RPROTO"
+Select the originating protocol.
+.RE
.TP
.B ip rule show - list rules
This command has no arguments.
@@ -283,6 +293,12 @@ The options list or lst are synonyms with show.
.TP
.B ip rule save
+.RS
+.TP
+.BI protocl " RPROTO"
+Select the originating protocol.
+.RE
+.TP
save rules table information to stdout
.RS
This command behaves like
--
2.14.3
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