On 22/02/2021 19:40, svc.eng.git-m...@nutanix.com wrote:
> From: karthik-kc <karthi...@nutanix.com>
Hi Karthik. Thanks for this. I have some comments below.
Also, just to let you know, its needs a rebase and the UTs passed for me.
>
> Physical switches have the ability to specify "discard" or sometimes
> "NULL interface" as a nexthop for routes. This can be used to prevent
> routing loops in the network. Add a similar configuration for ovn
> where nexthop accepts the string "discard". When the nexthop is discard
> the action in the routing table will be to drop the packets.
>
> Signed-off-by: Karthik Chandrashekar <karthi...@nutanix.com>
> ---
> northd/ovn-northd.c | 126 +++++++++++++++++++++++-------------------
> ovn-nb.xml | 4 +-
> tests/ovn-nbctl.at | 13 +++++
> tests/ovn.at | 93 +++++++++++++++++++++++++++++++
> utilities/ovn-nbctl.c | 50 ++++++++++++-----
> 5 files changed, 215 insertions(+), 71 deletions(-)
>
> diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
> index 39d798782..18d0e0b43 100644
> --- a/northd/ovn-northd.c
> +++ b/northd/ovn-northd.c
> @@ -7749,6 +7749,7 @@ struct parsed_route {
> uint32_t hash;
> const struct nbrec_logical_router_static_route *route;
> bool ecmp_symmetric_reply;
> + bool is_discard_route;
> };
>
> static uint32_t
> @@ -7768,20 +7769,23 @@ parsed_routes_add(struct ovs_list *routes,
> /* Verify that the next hop is an IP address with an all-ones mask. */
> struct in6_addr nexthop;
> unsigned int plen;
> - if (!ip46_parse_cidr(route->nexthop, &nexthop, &plen)) {
> - static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> - VLOG_WARN_RL(&rl, "bad 'nexthop' %s in static route"
> - UUID_FMT, route->nexthop,
> - UUID_ARGS(&route->header_.uuid));
> - return NULL;
> - }
> - if ((IN6_IS_ADDR_V4MAPPED(&nexthop) && plen != 32) ||
> - (!IN6_IS_ADDR_V4MAPPED(&nexthop) && plen != 128)) {
> - static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> - VLOG_WARN_RL(&rl, "bad next hop mask %s in static route"
> - UUID_FMT, route->nexthop,
> - UUID_ARGS(&route->header_.uuid));
> - return NULL;
> + bool is_discard_route = !strcmp(route->nexthop, "discard");
> + if (!is_discard_route) {
> + if (!ip46_parse_cidr(route->nexthop, &nexthop, &plen)) {
> + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> + VLOG_WARN_RL(&rl, "bad 'nexthop' %s in static route"
> + UUID_FMT, route->nexthop,
> + UUID_ARGS(&route->header_.uuid));
> + return NULL;
> + }
> + if ((IN6_IS_ADDR_V4MAPPED(&nexthop) && plen != 32) ||
> + (!IN6_IS_ADDR_V4MAPPED(&nexthop) && plen != 128)) {
> + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> + VLOG_WARN_RL(&rl, "bad next hop mask %s in static route"
> + UUID_FMT, route->nexthop,
> + UUID_ARGS(&route->header_.uuid));
> + return NULL;
> + }
> }
>
> /* Parse ip_prefix */
> @@ -7795,13 +7799,15 @@ parsed_routes_add(struct ovs_list *routes,
> }
>
> /* Verify that ip_prefix and nexthop have same address familiy. */
> - if (IN6_IS_ADDR_V4MAPPED(&prefix) != IN6_IS_ADDR_V4MAPPED(&nexthop)) {
> - static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> - VLOG_WARN_RL(&rl, "Address family doesn't match between 'ip_prefix'
> %s"
> - " and 'nexthop' %s in static route"UUID_FMT,
> - route->ip_prefix, route->nexthop,
> - UUID_ARGS(&route->header_.uuid));
> - return NULL;
> + if (!is_discard_route) {
> + if (IN6_IS_ADDR_V4MAPPED(&prefix) != IN6_IS_ADDR_V4MAPPED(&nexthop))
> {
> + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> + VLOG_WARN_RL(&rl, "Address family doesn't match between
> 'ip_prefix' %s"
> + " and 'nexthop' %s in static route"UUID_FMT,
> + route->ip_prefix, route->nexthop,
> + UUID_ARGS(&route->header_.uuid));
> + return NULL;
> + }
> }
>
> const struct nbrec_bfd *nb_bt = route->bfd;
> @@ -7832,6 +7838,7 @@ parsed_routes_add(struct ovs_list *routes,
> pr->route = route;
> pr->ecmp_symmetric_reply = smap_get_bool(&route->options,
> "ecmp_symmetric_reply", false);
> + pr->is_discard_route = is_discard_route;
> ovs_list_insert(routes, &pr->list_node);
> return pr;
> }
> @@ -8244,10 +8251,11 @@ build_ecmp_route_flow(struct hmap *lflows, struct
> ovn_datapath *od,
> }
>
> static void
> -add_route(struct hmap *lflows, const struct ovn_port *op,
> - const char *lrp_addr_s, const char *network_s, int plen,
> - const char *gateway, bool is_src_route,
> - const struct ovsdb_idl_row *stage_hint)
> +add_route(struct hmap *lflows, struct ovn_datapath *od,
> + const struct ovn_port *op, const char *lrp_addr_s,
> + const char *network_s, int plen, const char *gateway,
> + bool is_src_route, const struct ovsdb_idl_row *stage_hint,
> + bool is_discard_route)
> {
> bool is_ipv4 = strchr(network_s, '.') ? true : false;
> struct ds match = DS_EMPTY_INITIALIZER;
> @@ -8266,30 +8274,34 @@ add_route(struct hmap *lflows, const struct ovn_port
> *op,
> &match, &priority);
>
> struct ds common_actions = DS_EMPTY_INITIALIZER;
> - ds_put_format(&common_actions, REG_ECMP_GROUP_ID" = 0; %s = ",
> - is_ipv4 ? REG_NEXT_HOP_IPV4 : REG_NEXT_HOP_IPV6);
> - if (gateway) {
> - ds_put_cstr(&common_actions, gateway);
> - } else {
> - ds_put_format(&common_actions, "ip%s.dst", is_ipv4 ? "4" : "6");
> - }
> - ds_put_format(&common_actions, "; "
> - "%s = %s; "
> - "eth.src = %s; "
> - "outport = %s; "
> - "flags.loopback = 1; "
> - "next;",
> - is_ipv4 ? REG_SRC_IPV4 : REG_SRC_IPV6,
> - lrp_addr_s,
> - op->lrp_networks.ea_s,
> - op->json_key);
> struct ds actions = DS_EMPTY_INITIALIZER;
> - ds_put_format(&actions, "ip.ttl--; %s", ds_cstr(&common_actions));
> + if (is_discard_route) {
> + ds_put_format(&actions, "drop;");
> + } else {
> + ds_put_format(&common_actions, REG_ECMP_GROUP_ID" = 0; %s = ",
> + is_ipv4 ? REG_NEXT_HOP_IPV4 : REG_NEXT_HOP_IPV6);
> + if (gateway) {
> + ds_put_cstr(&common_actions, gateway);
> + } else {
> + ds_put_format(&common_actions, "ip%s.dst", is_ipv4 ? "4" : "6");
> + }
> + ds_put_format(&common_actions, "; "
> + "%s = %s; "
> + "eth.src = %s; "
> + "outport = %s; "
> + "flags.loopback = 1; "
> + "next;",
> + is_ipv4 ? REG_SRC_IPV4 : REG_SRC_IPV6,
> + lrp_addr_s,
> + op->lrp_networks.ea_s,
> + op->json_key);
> + ds_put_format(&actions, "ip.ttl--; %s", ds_cstr(&common_actions));
> + }
>
> - ovn_lflow_add_with_hint(lflows, op->od, S_ROUTER_IN_IP_ROUTING, priority,
> + ovn_lflow_add_with_hint(lflows, od, S_ROUTER_IN_IP_ROUTING, priority,
> ds_cstr(&match), ds_cstr(&actions),
> stage_hint);
> - if (op->has_bfd) {
> + if (op && op->has_bfd) {
> ds_put_format(&match, " && udp.dst == 3784");
> ovn_lflow_add_with_hint(lflows, op->od, S_ROUTER_IN_IP_ROUTING,
> priority + 1, ds_cstr(&match),
> @@ -8311,16 +8323,18 @@ build_static_route_flow(struct hmap *lflows, struct
> ovn_datapath *od,
> const struct nbrec_logical_router_static_route *route = route_->route;
>
> /* Find the outgoing port. */
> - if (!find_static_route_outport(od, ports, route,
> - IN6_IS_ADDR_V4MAPPED(&route_->prefix),
> - &lrp_addr_s, &out_port)) {
> - return;
> + if (!route_->is_discard_route) {
> + if (!find_static_route_outport(od, ports, route,
> + IN6_IS_ADDR_V4MAPPED(&route_->prefix),
> + &lrp_addr_s, &out_port)) {
> + return;
> + }
> }
>
> char *prefix_s = build_route_prefix_s(&route_->prefix, route_->plen);
> - add_route(lflows, out_port, lrp_addr_s, prefix_s, route_->plen,
> - route->nexthop, route_->is_src_route,
> - &route->header_);
> + add_route(lflows, route_->is_discard_route ? od : out_port->od, out_port,
> + lrp_addr_s, prefix_s, route_->plen, route->nexthop,
> + route_->is_src_route, &route->header_,
> route_->is_discard_route);
>
> free(prefix_s);
> }
> @@ -9386,17 +9400,17 @@ build_ip_routing_flows_for_lrouter_port(
> if (op->nbrp) {
>
> for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) {
> - add_route(lflows, op, op->lrp_networks.ipv4_addrs[i].addr_s,
> + add_route(lflows, op->od, op,
> op->lrp_networks.ipv4_addrs[i].addr_s,
> op->lrp_networks.ipv4_addrs[i].network_s,
> op->lrp_networks.ipv4_addrs[i].plen, NULL, false,
> - &op->nbrp->header_);
> + &op->nbrp->header_, false);
> }
>
> for (int i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) {
> - add_route(lflows, op, op->lrp_networks.ipv6_addrs[i].addr_s,
> + add_route(lflows, op->od, op,
> op->lrp_networks.ipv6_addrs[i].addr_s,
> op->lrp_networks.ipv6_addrs[i].network_s,
> op->lrp_networks.ipv6_addrs[i].plen, NULL, false,
> - &op->nbrp->header_);
> + &op->nbrp->header_, false);
> }
> }
> }
> diff --git a/ovn-nb.xml b/ovn-nb.xml
> index a94918bb6..85efd70f2 100644
> --- a/ovn-nb.xml
> +++ b/ovn-nb.xml
> @@ -2636,7 +2636,9 @@
> <column name="nexthop">
> <p>
> Nexthop IP address for this route. Nexthop IP address should be the
> IP
> - address of a connected router port or the IP address of a logical
> port.
> + address of a connected router port or the IP address of a logical
> port
> + or can be set to "discard" for dropping packets which match the given
Looking at other examples in this document, I think you should highlight
"discard" with <code> </code>.
Also, you should update the "ovs-nbctl" man page.
> + route.
> </p>
> </column>
>
> diff --git a/tests/ovn-nbctl.at b/tests/ovn-nbctl.at
> index 6d91aa4c5..f4b2a88c2 100644
> --- a/tests/ovn-nbctl.at
> +++ b/tests/ovn-nbctl.at
> @@ -1467,18 +1467,26 @@ AT_CHECK([ovn-nbctl lr-route-add lr0 10.0.0.111/24
> 11.0.0.1/24], [1], [],
> AT_CHECK([ovn-nbctl lr-route-add lr0 2001:0db8:1::/64
> 2001:0db8:0:f103::1/64], [1], [],
> [ovn-nbctl: bad IPv6 nexthop argument: 2001:0db8:0:f103::1/64
> ])
> +AT_CHECK([ovn-nbctl lr-route-add lr0 20.0.0.0/24 discard lp0], [1], [],
> + [ovn-nbctl: outport is not valid for discard routes.
> +])
>
> AT_CHECK([ovn-nbctl --may-exist lr-route-add lr0 10.0.0.111/24 11.0.0.1])
> AT_CHECK([ovn-nbctl --policy=src-ip lr-route-add lr0 9.16.1.0/24 11.0.0.1])
> dnl Add a route with existed prefix but different policy (src-ip)
> AT_CHECK([ovn-nbctl --policy=src-ip lr-route-add lr0 10.0.0.0/24 11.0.0.2])
>
> +AT_CHECK([ovn-nbctl lr-route-add lr0 20.0.0.0/24 discard])
> +AT_CHECK([ovn-nbctl --policy=src-ip lr-route-add lr0 20.0.0.0/24 discard])
> +
Depending on the outcome of the bfd/ecmp questions that I have in the
"ovn-nbctl.c" section below, you may need to add some tests for them.
> AT_CHECK([ovn-nbctl lr-route-list lr0], [0], [dnl
> IPv4 Routes
> 10.0.0.0/24 11.0.0.1 dst-ip
> 10.0.1.0/24 11.0.1.1 dst-ip lp0
> + 20.0.0.0/24 discard dst-ip
> 9.16.1.0/24 11.0.0.1 src-ip
> 10.0.0.0/24 11.0.0.2 src-ip
> + 20.0.0.0/24 discard src-ip
> 0.0.0.0/0 192.168.0.1 dst-ip
> ])
>
> @@ -1487,11 +1495,16 @@ AT_CHECK([ovn-nbctl lr-route-list lr0], [0], [dnl
> IPv4 Routes
> 10.0.0.0/24 11.0.0.1 dst-ip lp1
> 10.0.1.0/24 11.0.1.1 dst-ip lp0
> + 20.0.0.0/24 discard dst-ip
> 9.16.1.0/24 11.0.0.1 src-ip
> 10.0.0.0/24 11.0.0.2 src-ip
> + 20.0.0.0/24 discard src-ip
> 0.0.0.0/0 192.168.0.1 dst-ip
> ])
>
> +AT_CHECK([ovn-nbctl --policy=src-ip lr-route-del lr0 20.0.0.0/24])
> +AT_CHECK([ovn-nbctl lr-route-del lr0 20.0.0.0/24 discard])
> +
> dnl Delete non-existent prefix
> AT_CHECK([ovn-nbctl lr-route-del lr0 10.0.2.1/24], [1], [],
> [ovn-nbctl: no matching route: policy 'any', prefix '10.0.2.0/24', nexthop
> 'any', output_port 'any'.
> diff --git a/tests/ovn.at b/tests/ovn.at
> index 55ea6d170..cdbf035fb 100644
> --- a/tests/ovn.at
> +++ b/tests/ovn.at
> @@ -24049,3 +24049,96 @@ wait_column "true" nb:Logical_Switch_Port up
> name=lsp1
>
> OVN_CLEANUP([hv1])
> AT_CLEANUP
> +
> +AT_SETUP([ovn -- Static route with discard nexthop])
> +ovn_start
> +
> +# Logical network:
> +# Logical Router lr1 has Logical Switch sw1 (10.0.0.0/24) connected to it.
> sw1 has one
> +# switch port sw1-ls1 (10.0.0.100)
> +
> +ovn-nbctl lr-add lr1
> +
> +ovn-nbctl ls-add sw1
> +
> +# Connect sw1 to lr1
> +ovn-nbctl lrp-add lr1 lr1-sw1 00:00:01:01:02:03 10.0.0.1/24
> +ovn-nbctl lsp-add sw1 sw1-lr1
> +ovn-nbctl lsp-set-type sw1-lr1 router
> +ovn-nbctl lsp-set-addresses sw1-lr1 router
> +ovn-nbctl lsp-set-options sw1-lr1 router-port=lr1-sw1
> +
> +# Create logical port sw1-lp1 in sw1
> +ovn-nbctl lsp-add sw1 sw1-lp1 \
> +-- lsp-set-addresses sw1-lp1 "00:00:04:01:02:03 10.0.0.100"
> +
> +# Create one hypervisor and create OVS ports corresponding to logical ports.
> +net_add n1
> +
> +sim_add hv1
> +as hv1
> +ovs-vsctl add-br br-phys
> +ovn_attach n1 br-phys 192.168.0.1
> +
> +ovs-vsctl -- add-port br-int hv1-vif1 -- \
> + set interface hv1-vif1 external-ids:iface-id=sw1-lp1 \
> + options:tx_pcap=hv1/vif1-tx.pcap \
> + options:rxq_pcap=hv1/vif1-rx.pcap \
> + ofport-request=1
> +
> +# Install static routes to drop traffic
> +ovn-nbctl lr-route-add lr1 20.0.0.0/24 discard
> +
> +# Allow some time for ovn-controller to catch up.
> +ovn-nbctl --wait=hv sync
> +
> +# Check logical flows for drop rule
> +AT_CHECK([ovn-sbctl dump-flows | grep lr_in_ip_routing | grep "20.0.0.0/24"
> | \
> + grep drop | wc -l], [0], [dnl
> +1
> +])
> +
> +# Send packet.
> +packet="inport==\"sw1-lp1\" && eth.src==00:00:04:01:02:03 &&
> + eth.dst==00:00:01:01:02:03 && ip4 && ip.ttl==64 &&
> + ip4.src==10.0.0.100 && ip4.dst==20.0.0.200 &&
> + udp && udp.src==53 && udp.dst==4369"
> +
> +as hv1 ovs-appctl -t ovn-controller inject-pkt "$packet"
> +
> +# Check if packet hit the drop rule
> +AT_CHECK([ovs-ofctl dump-flows br-int | grep "nw_dst=20.0.0.0/24" | \
> + grep "actions=drop" | grep "n_packets=1" | wc -l], [0], [dnl
> +1
> +])
> +
> +# Remove destination match and add discard route with source match
> +ovn-nbctl lr-route-del lr1 20.0.0.0/24
> +ovn-nbctl --policy="src-ip" lr-route-add lr1 10.0.0.0/24 discard
> +
> +# Allow some time for ovn-controller to catch up.
> +ovn-nbctl --wait=hv sync
> +
> +# Check logical flows for drop rule
> +AT_CHECK([ovn-sbctl dump-flows | grep lr_in_ip_routing | grep "10.0.0.0/24"
> | \
> + grep drop | wc -l], [0], [dnl
> +1
> +])
> +
> +# Send packet.
> +packet="inport==\"sw1-lp1\" && eth.src==00:00:04:01:02:03 &&
> + eth.dst==00:00:01:01:02:03 && ip4 && ip.ttl==64 &&
> + ip4.src==10.0.0.100 && ip4.dst==20.0.0.200 &&
> + udp && udp.src==53 && udp.dst==4369"
> +
> +as hv1 ovs-appctl -t ovn-controller inject-pkt "$packet"
> +
> +# Check if packet hit the drop rule
> +AT_CHECK([ovs-ofctl dump-flows br-int "nw_src=10.0.0.0/24" | \
> + grep "actions=drop" | grep "n_packets=1" | wc -l], [0], [dnl
> +1
> +])
> +
> +OVN_CLEANUP([hv1])
> +
> +AT_CLEANUP
> diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
> index 2c77f4ba7..cab645d83 100644
> --- a/utilities/ovn-nbctl.c
> +++ b/utilities/ovn-nbctl.c
> @@ -3972,6 +3972,7 @@ nbctl_lr_route_add(struct ctl_context *ctx)
>
> const char *policy = shash_find_data(&ctx->options, "--policy");
> bool is_src_route = false;
> + bool is_discard_route = !strcmp(ctx->argv[3], "discard");
bit of a nit but this could probably be moved to just above where you
use it below?
> if (policy) {
> if (!strcmp(policy, "src-ip")) {
> is_src_route = true;
> @@ -3992,13 +3993,17 @@ nbctl_lr_route_add(struct ctl_context *ctx)
> return;
> }
>
> - next_hop = v6_prefix
> - ? normalize_ipv6_addr_str(ctx->argv[3])
> - : normalize_ipv4_addr_str(ctx->argv[3]);
> - if (!next_hop) {
> - ctl_error(ctx, "bad %s nexthop argument: %s",
> - v6_prefix ? "IPv6" : "IPv4", ctx->argv[3]);
> - goto cleanup;
> + if (is_discard_route) {
> + next_hop = xasprintf("discard");
> + } else {
> + next_hop = v6_prefix
> + ? normalize_ipv6_addr_str(ctx->argv[3])
> + : normalize_ipv4_addr_str(ctx->argv[3]);
> + if (!next_hop) {
> + ctl_error(ctx, "bad %s nexthop argument: %s",
> + v6_prefix ? "IPv6" : "IPv4", ctx->argv[3]);
> + goto cleanup;
> + }
> }
>
> struct shash_node *bfd = shash_find(&ctx->options, "--bfd");
> @@ -4047,6 +4052,10 @@ nbctl_lr_route_add(struct ctl_context *ctx)
> nbrec_logical_router_static_route_set_ip_prefix(route, prefix);
> nbrec_logical_router_static_route_set_nexthop(route, next_hop);
> if (ctx->argc == 5) {
> + if (is_discard_route) {
> + ctl_error(ctx, "outport is not valid for discard
> routes.");
> + goto cleanup;
> + }
> nbrec_logical_router_static_route_set_output_port(
> route, ctx->argv[4]);
> }
Is "discard" relevant for BFD? I would think not but not sure of the BFD
implmentation but it the BFD peer address is getting setting to next_hop
which could be "discard".
> @@ -4076,6 +4085,10 @@ nbctl_lr_route_add(struct ctl_context *ctx)
> nbrec_logical_router_static_route_set_ip_prefix(route, prefix);
> nbrec_logical_router_static_route_set_nexthop(route, next_hop);
> if (ctx->argc == 5) {
> + if (is_discard_route) {
> + ctl_error(ctx, "outport is not valid for discard routes.");
> + goto cleanup;
> + }
You check for this at least twice. Maybe you can consolidate these
checks in one check at the top of this function somewhere?
> nbrec_logical_router_static_route_set_output_port(route,
> ctx->argv[4]);
You dont seem to disable this if ecmp is enabled? How does this work
with ecmp?
> }
> if (policy) {
> @@ -4146,10 +4159,14 @@ nbctl_lr_route_del(struct ctl_context *ctx)
>
> char *nexthop = NULL;
> if (ctx->argc >= 4) {
> - nexthop = normalize_prefix_str(ctx->argv[3]);
> - if (!nexthop) {
> - ctl_error(ctx, "bad nexthop argument: %s", ctx->argv[3]);
> - return;
> + if (!strcmp(ctx->argv[3], "discard")) {
> + nexthop = xasprintf("discard");
> + } else {
> + nexthop = normalize_prefix_str(ctx->argv[3]);
> + if (!nexthop) {
> + ctl_error(ctx, "bad nexthop argument: %s", ctx->argv[3]);
> + return;
> + }
> }
> }
>
> @@ -4189,9 +4206,12 @@ nbctl_lr_route_del(struct ctl_context *ctx)
> }
>
> /* Compare nexthop, if specified. */
> + bool is_discard_route = !strcmp(lr->static_routes[i]->nexthop,
> + "discard");
bit of a nit but i guess we dont need to do this strcmp() unless
'nexthop' is specified.
> if (nexthop) {
> - char *rt_nexthop =
> - normalize_prefix_str(lr->static_routes[i]->nexthop);
> + char *rt_nexthop = is_discard_route
> + ? xasprintf("discard")
> + : normalize_prefix_str(lr->static_routes[i]->nexthop);
> if (!rt_nexthop) {
> /* Ignore existing nexthop we couldn't parse. */
> continue;
> @@ -5579,7 +5599,9 @@ print_route(const struct
> nbrec_logical_router_static_route *route,
> {
>
> char *prefix = normalize_prefix_str(route->ip_prefix);
> - char *next_hop = normalize_prefix_str(route->nexthop);
> + char *next_hop = !strcmp(route->nexthop, "discard")
> + ? xasprintf("discard")
> + : normalize_prefix_str(route->nexthop);
> ds_put_format(s, "%25s %25s", prefix, next_hop);
> free(prefix);
> free(next_hop);
>
_______________________________________________
dev mailing list
d...@openvswitch.org
https://mail.openvswitch.org/mailman/listinfo/ovs-dev
