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Message-Id: <1545380334-26246-1-git-send-email-wenxu@ucloud.cn>
Date: Fri, 21 Dec 2018 16:18:54 +0800
From: wenxu@...oud.cn
To: stephen@...workplumber.org, netdev@...r.kernel.org
Subject: [PATCH iproute2 v3] iproute: Set ip/ip6 lwtunnel flags
From: wenxu <wenxu@...oud.cn>
ip l add dev tun type gretap external
ip r a 10.0.0.1 encap ip dst 192.168.152.171 id 1000 dev gretap
For gretap example when the command set the id but don't set the
TUNNEL_KEY flags. There is no key field in the send packet
User can set flags with key, csum, seq
ip r a 10.0.0.1 encap ip dst 192.168.152.171 id 1000 key csum dev gretap
Signed-off-by: wenxu <wenxu@...oud.cn>
---
ip/iproute_lwtunnel.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++-
man/man8/ip-route.8.in | 3 ++-
2 files changed, 59 insertions(+), 2 deletions(-)
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index aee18ac..578271f 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -31,7 +31,7 @@
#include <linux/seg6_iptunnel.h>
#include <linux/seg6_hmac.h>
#include <linux/seg6_local.h>
-#include <net/if.h>
+#include <linux/if_tunnel.h>
static const char *format_encap_type(int type)
{
@@ -294,6 +294,7 @@ static void print_encap_mpls(FILE *fp, struct rtattr *encap)
static void print_encap_ip(FILE *fp, struct rtattr *encap)
{
struct rtattr *tb[LWTUNNEL_IP_MAX+1];
+ __u16 flags;
parse_rtattr_nested(tb, LWTUNNEL_IP_MAX, encap);
@@ -318,6 +319,16 @@ static void print_encap_ip(FILE *fp, struct rtattr *encap)
if (tb[LWTUNNEL_IP_TOS])
print_uint(PRINT_ANY, "tos",
"tos %d ", rta_getattr_u8(tb[LWTUNNEL_IP_TOS]));
+
+ if (tb[LWTUNNEL_IP_FLAGS]) {
+ flags = rta_getattr_u16(tb[LWTUNNEL_IP_FLAGS]);
+ if (flags & TUNNEL_KEY)
+ print_string(PRINT_ANY, NULL, "%s ", "key");
+ if (flags & TUNNEL_CSUM)
+ print_string(PRINT_ANY, NULL, "%s ", "csum");
+ if (flags & TUNNEL_SEQ)
+ print_string(PRINT_ANY, NULL, "%s ", "seq");
+ }
}
static void print_encap_ila(FILE *fp, struct rtattr *encap)
@@ -354,6 +365,7 @@ static void print_encap_ila(FILE *fp, struct rtattr *encap)
static void print_encap_ip6(FILE *fp, struct rtattr *encap)
{
struct rtattr *tb[LWTUNNEL_IP6_MAX+1];
+ __u16 flags;
parse_rtattr_nested(tb, LWTUNNEL_IP6_MAX, encap);
@@ -379,6 +391,16 @@ static void print_encap_ip6(FILE *fp, struct rtattr *encap)
if (tb[LWTUNNEL_IP6_TC])
print_uint(PRINT_ANY, "tc",
"tc %u ", rta_getattr_u8(tb[LWTUNNEL_IP6_TC]));
+
+ if (tb[LWTUNNEL_IP6_FLAGS]) {
+ flags = rta_getattr_u16(tb[LWTUNNEL_IP6_FLAGS]);
+ if (flags & TUNNEL_KEY)
+ print_string(PRINT_ANY, NULL, "%s ", "key");
+ if (flags & TUNNEL_CSUM)
+ print_string(PRINT_ANY, NULL, "%s ", "csum");
+ if (flags & TUNNEL_SEQ)
+ print_string(PRINT_ANY, NULL, "%s ", "seq");
+ }
}
static void print_encap_bpf(FILE *fp, struct rtattr *encap)
@@ -777,9 +799,11 @@ static int parse_encap_ip(struct rtattr *rta, size_t len,
int *argcp, char ***argvp)
{
int id_ok = 0, dst_ok = 0, src_ok = 0, tos_ok = 0, ttl_ok = 0;
+ int key_ok = 0, csum_ok = 0, seq_ok = 0;
char **argv = *argvp;
int argc = *argcp;
int ret = 0;
+ __u16 flags = 0;
while (argc > 0) {
if (strcmp(*argv, "id") == 0) {
@@ -827,6 +851,18 @@ static int parse_encap_ip(struct rtattr *rta, size_t len,
if (get_u8(&ttl, *argv, 0))
invarg("\"ttl\" value is invalid\n", *argv);
ret = rta_addattr8(rta, len, LWTUNNEL_IP_TTL, ttl);
+ } else if (strcmp(*argv, "key") == 0) {
+ if (key_ok++)
+ duparg2("key", *argv);
+ flags |= TUNNEL_KEY;
+ } else if (strcmp(*argv, "csum") == 0) {
+ if (csum_ok++)
+ duparg2("csum", *argv);
+ flags |= TUNNEL_CSUM;
+ } else if (strcmp(*argv, "seq") == 0) {
+ if (seq_ok++)
+ duparg2("seq", *argv);
+ flags |= TUNNEL_SEQ;
} else {
break;
}
@@ -835,6 +871,9 @@ static int parse_encap_ip(struct rtattr *rta, size_t len,
argc--; argv++;
}
+ if (flags)
+ ret = rta_addattr16(rta, len, LWTUNNEL_IP_FLAGS, flags);
+
/* argv is currently the first unparsed argument,
* but the lwt_parse_encap() caller will move to the next,
* so step back
@@ -927,9 +966,11 @@ static int parse_encap_ip6(struct rtattr *rta, size_t len,
int *argcp, char ***argvp)
{
int id_ok = 0, dst_ok = 0, src_ok = 0, tos_ok = 0, ttl_ok = 0;
+ int key_ok = 0, csum_ok = 0, seq_ok = 0;
char **argv = *argvp;
int argc = *argcp;
int ret = 0;
+ __u16 flags = 0;
while (argc > 0) {
if (strcmp(*argv, "id") == 0) {
@@ -979,6 +1020,18 @@ static int parse_encap_ip6(struct rtattr *rta, size_t len,
*argv);
ret = rta_addattr8(rta, len, LWTUNNEL_IP6_HOPLIMIT,
hoplimit);
+ } else if (strcmp(*argv, "key") == 0) {
+ if (key_ok++)
+ duparg2("key", *argv);
+ flags |= TUNNEL_KEY;
+ } else if (strcmp(*argv, "csum") == 0) {
+ if (csum_ok++)
+ duparg2("csum", *argv);
+ flags |= TUNNEL_CSUM;
+ } else if (strcmp(*argv, "seq") == 0) {
+ if (seq_ok++)
+ duparg2("seq", *argv);
+ flags |= TUNNEL_SEQ;
} else {
break;
}
@@ -987,6 +1040,9 @@ static int parse_encap_ip6(struct rtattr *rta, size_t len,
argc--; argv++;
}
+ if (flags)
+ ret = rta_addattr16(rta, len, LWTUNNEL_IP6_FLAGS, flags);
+
/* argv is currently the first unparsed argument,
* but the lwt_parse_encap() caller will move to the next,
* so step back
diff --git a/man/man8/ip-route.8.in b/man/man8/ip-route.8.in
index 26dfe0b..1ab9b1c 100644
--- a/man/man8/ip-route.8.in
+++ b/man/man8/ip-route.8.in
@@ -737,7 +737,8 @@ is a set of encapsulation attributes specific to the
.B tos
.IR TOS " ] ["
.B ttl
-.IR TTL " ]"
+.IR TTL " ] [ "
+.BR key " ] [" csum " ] [ " seq " ] "
.in -2
.sp
--
1.8.3.1
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