From: Ankur Sharma <[email protected]>
This patch has northd changes which consumes applied/exempted external ip
configuration per NAT rule in logical flow.
Applied/Exempted external ip range adds an additional match criteria in
snat/dnat/unsnat/undant logical flow rules.
For example, if an allowed_external_ip address set ("efgh")
is configured for following NAT rule.
TYPE EXTERNAL_IP LOGICAL_IP
snat 10.15.24.135 50.0.0.10
Then logical flow will look like following:
..(lr_out_snat)...match=(ip && .... && ip4.dst == $efgh), action=(ct_snat(...);)
...(lr_in_unsnat...)match=(ip && ..... && ip4.src == $efgh), action=(ct_snat;)
Signed-off-by: Ankur Sharma <[email protected]>
---
northd/ovn-northd.c | 61 +++++++++++++++++++++++++
tests/ovn-northd.at | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 188 insertions(+)
diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index 203391a..32b14ac 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -8047,6 +8047,23 @@ lrouter_nat_is_stateless(const struct nbrec_nat *nat)
return false;
}
+static inline void
+lrouter_nat_add_ext_ip_match(struct ds *match, const struct nbrec_nat *nat,
+ bool is_v6, bool is_src)
+{
+ struct nbrec_address_set *applied_ext_ips = nat->applied_ext_ips;
+ struct nbrec_address_set *exempted_ext_ips = nat->exempted_ext_ips;
+
+ ds_put_format(match, " && ip%s.%s %s $%s",
+ is_v6 ? "6" : "4",
+ is_src ? "src" : "dst",
+ applied_ext_ips? "==" : "!=",
+ applied_ext_ips?
+ applied_ext_ips->name :
+ exempted_ext_ips->name);
+ return;
+}
+
/* Builds the logical flow that replies to ARP requests for an 'ip_address'
* owned by the router. The flow is inserted in table S_ROUTER_IN_IP_INPUT
* with the given priority.
@@ -8996,6 +9013,18 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
struct in6_addr ipv6, mask_v6, v6_exact = IN6ADDR_EXACT_INIT;
bool is_v6 = false;
bool stateless = lrouter_nat_is_stateless(nat);
+ struct nbrec_address_set *applied_ext_ips =
+ nat->applied_ext_ips;
+ struct nbrec_address_set *exempted_ext_ips =
+ nat->exempted_ext_ips;
+
+ if (applied_ext_ips && exempted_ext_ips) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_WARN_RL(&rl, "NAT rule: "UUID_FMT" not applied, since"
+ "both applied and exempt external ips set",
+ UUID_ARGS(&(nat->header_.uuid)));
+ continue;
+ }
char *error = ip_parse_masked(nat->external_ip, &ip, &mask);
if (error || mask != OVS_BE32_MAX) {
@@ -9083,6 +9112,10 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, "ip && ip%s.dst == %s",
is_v6 ? "6" : "4",
nat->external_ip);
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6, true);
+ }
+
if (!strcmp(nat->type, "dnat_and_snat") && stateless) {
ds_put_format(&actions, "ip%s.dst=%s; next;",
is_v6 ? "6" : "4", nat->logical_ip);
@@ -9112,6 +9145,10 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
od->l3redirect_port->json_key);
}
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6, true);
+ }
+
if (!strcmp(nat->type, "dnat_and_snat") && stateless) {
ds_put_format(&actions, "ip%s.dst=%s; next;",
is_v6 ? "6" : "4", nat->logical_ip);
@@ -9140,6 +9177,10 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, "ip && ip%s.dst == %s",
is_v6 ? "6" : "4",
nat->external_ip);
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6, true);
+ }
+
ds_clear(&actions);
if (dnat_force_snat_ip) {
/* Indicate to the future tables that a DNAT has taken
@@ -9183,6 +9224,11 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, " && is_chassis_resident(%s)",
od->l3redirect_port->json_key);
}
+
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6, true);
+ }
+
ds_clear(&actions);
if (!strcmp(nat->type, "dnat_and_snat") && stateless) {
@@ -9264,6 +9310,11 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, " && is_chassis_resident(%s)",
od->l3redirect_port->json_key);
}
+
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6, false);
+ }
+
ds_clear(&actions);
if (distributed) {
ds_put_format(&actions, "eth.src = "ETH_ADDR_FMT"; ",
@@ -9293,6 +9344,11 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, "ip && ip%s.src == %s",
is_v6 ? "6" : "4",
nat->logical_ip);
+
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6,
false);
+ }
+
ds_clear(&actions);
if (!strcmp(nat->type, "dnat_and_snat") && stateless) {
@@ -9333,6 +9389,11 @@ build_lrouter_flows(struct hmap *datapaths, struct hmap
*ports,
ds_put_format(&match, " && is_chassis_resident(%s)",
od->l3redirect_port->json_key);
}
+
+ if (applied_ext_ips || exempted_ext_ips) {
+ lrouter_nat_add_ext_ip_match(&match, nat, is_v6,
false);
+ }
+
ds_clear(&actions);
if (distributed) {
ds_put_format(&actions, "eth.src = "ETH_ADDR_FMT"; ",
diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index 1e4d20a..387b2bb 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -1140,6 +1140,133 @@ ovn-nbctl lr-nat-del R1 dnat_and_snat 172.16.1.1
AT_CLEANUP
+AT_SETUP([ovn -- check allowed/disallowed external dnat, snat and
dnat_and_snat rules])
+ovn_start
+
+ovn-sbctl chassis-add gw1 geneve 127.0.0.1
+
+ovn-nbctl lr-add R1
+ovn-nbctl lrp-add R1 R1-S1 02:ac:10:01:00:01 172.16.1.1/24
+
+ovn-nbctl ls-add S1
+ovn-nbctl lsp-add S1 S1-R1
+ovn-nbctl lsp-set-type S1-R1 router
+ovn-nbctl lsp-set-addresses S1-R1 router
+ovn-nbctl --wait=sb lsp-set-options S1-R1 router-port=R1-S1
+
+ovn-nbctl lrp-set-gateway-chassis R1-S1 gw1
+
+uuid=`ovn-sbctl --columns=_uuid --bare find Port_Binding logical_port=cr-R1-S1`
+echo "CR-LRP UUID is: " $uuid
+
+ovn-nbctl create Address_Set name=allowed_range addresses=\"1.1.1.1\"
+ovn-nbctl create Address_Set name=disallowed_range addresses=\"2.2.2.2\"
+
+# SNAT with ALLOWED_IPs
+ovn-nbctl lr-nat-add R1 snat 172.16.1.1 50.0.0.11
+ovn-nbctl --is-applied lr-nat-update-ext-ip R1 snat 50.0.0.11 allowed_range
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.1" | grep "ip4.src == $allowed_range" | wc -l], [0], [1
+])
+
+# SNAT with DISALLOWED_IPs
+ovn-nbctl lr-nat-del R1 snat 50.0.0.11
+ovn-nbctl lr-nat-add R1 snat 172.16.1.1 50.0.0.11
+ovn-nbctl lr-nat-update-ext-ip R1 snat 50.0.0.11 disallowed_range
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | \
+wc -l`])
+
+ovn-nbctl show R1
+ovn-sbctl dump-flows R1
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.1" | grep "ip4.src != $disallowed_range" | wc -l], [0], [1
+])
+
+# Stateful FIP with ALLOWED_IPs
+ovn-nbctl lr-nat-del R1 snat 50.0.0.11
+ovn-nbctl lr-nat-add R1 dnat_and_snat 172.16.1.2 50.0.0.11
+ovn-nbctl --is-applied lr-nat-update-ext-ip R1 dnat_and_snat 172.16.1.2
allowed_range
+ovn-nbctl show R1
+ovn-sbctl dump-flows R1
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_undnat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_dnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src == $allowed_range" | wc -l], [0], [1
+])
+
+# Stateful FIP with DISALLOWED_IPs
+ovn-nbctl lr-nat-del R1 dnat_and_snat 172.16.1.2
+ovn-nbctl lr-nat-add R1 dnat_and_snat 172.16.1.2 50.0.0.11
+ovn-nbctl lr-nat-update-ext-ip R1 dnat_and_snat 172.16.1.2 disallowed_range
+ovn-nbctl show R1
+ovn-sbctl dump-flows R1
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_undnat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_dnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src != $disallowed_range" | wc -l], [0], [1
+])
+
+# Stateless FIP with DISALLOWED_IPs
+ovn-nbctl lr-nat-del R1 dnat_and_snat 172.16.1.2
+ovn-nbctl --stateless lr-nat-add R1 dnat_and_snat 172.16.1.2 50.0.0.11
+ovn-nbctl --is-applied lr-nat-update-ext-ip R1 dnat_and_snat 172.16.1.2
allowed_range
+ovn-nbctl show R1
+ovn-sbctl dump-flows R1
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_undnat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst == $allowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_dnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src == $allowed_range" | wc -l], [0], [1
+])
+
+# Stateful FIP with DISALLOWED_IPs
+ovn-nbctl lr-nat-del R1 dnat_and_snat 172.16.1.2
+ovn-nbctl --stateless lr-nat-add R1 dnat_and_snat 172.16.1.2 50.0.0.11
+ovn-nbctl lr-nat-update-ext-ip R1 dnat_and_snat 172.16.1.2 disallowed_range
+ovn-nbctl show R1
+ovn-sbctl dump-flows R1
+
+OVS_WAIT_UNTIL([test 3 = `ovn-sbctl dump-flows R1 | grep lr_out_snat | \
+wc -l`])
+
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_snat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_unsnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_out_undnat | grep "ip4.src ==
50.0.0.11" | grep "ip4.dst != $disallowed_range" | wc -l], [0], [1
+])
+AT_CHECK([ovn-sbctl dump-flows R1 | grep lr_in_dnat | grep "ip4.dst ==
172.16.1.2" | grep "ip4.src != $disallowed_range" | wc -l], [0], [1
+])
+
+AT_CLEANUP
+
AT_SETUP([ovn -- check Load balancer health check and Service Monitor sync])
AT_SKIP_IF([test $HAVE_PYTHON = no])
ovn_start
--
1.8.3.1
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