udp: add udp encap source port entropy support
Encode entropy value in UDP source port when requested per RFC 7510.
CLI already has "src-port-is-entropy", use zero UDP source port in API
to avoid breaking changes, since zero port is not something to be used
in wild.
Also, mark UDP encapsualtion API as mp-safe as already done for CLI.
Type: feature
Change-Id: Ieb61ee11e058179ed566ff1f251a3391eb169d52
Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru>
diff --git a/src/vnet/udp/udp_encap.c b/src/vnet/udp/udp_encap.c
index a0f5a50..ac1f855 100644
--- a/src/vnet/udp/udp_encap.c
+++ b/src/vnet/udp/udp_encap.c
@@ -195,6 +195,20 @@
fib_node_unlock (&ue->ue_fib_node);
}
+u8 *
+format_udp_encap_fixup_flags (u8 *s, va_list *args)
+{
+ udp_encap_fixup_flags_t flags = va_arg (*args, udp_encap_fixup_flags_t);
+
+ if (flags == UDP_ENCAP_FIXUP_NONE)
+ return format (s, "none");
+
+ if (flags & UDP_ENCAP_FIXUP_UDP_SRC_PORT_ENTROPY)
+ s = format (s, "%s", "src-port-is-entropy");
+
+ return (s);
+}
+
static u8 *
format_udp_encap_i (u8 * s, va_list * args)
{
@@ -210,23 +224,21 @@
s = format (s, "udp-encap:[%d]: ip-fib-index:%d ", uei, ue->ue_fib_index);
if (FIB_PROTOCOL_IP4 == ue->ue_ip_proto)
{
- s = format (s, "ip:[src:%U, dst:%U] udp:[src:%d, dst:%d]",
- format_ip4_address,
- &ue->ue_hdrs.ip4.ue_ip4.src_address,
- format_ip4_address,
- &ue->ue_hdrs.ip4.ue_ip4.dst_address,
+ s = format (s, "ip:[src:%U, dst:%U] udp:[src:%d, dst:%d] flags:%U",
+ format_ip4_address, &ue->ue_hdrs.ip4.ue_ip4.src_address,
+ format_ip4_address, &ue->ue_hdrs.ip4.ue_ip4.dst_address,
clib_net_to_host_u16 (ue->ue_hdrs.ip4.ue_udp.src_port),
- clib_net_to_host_u16 (ue->ue_hdrs.ip4.ue_udp.dst_port));
+ clib_net_to_host_u16 (ue->ue_hdrs.ip4.ue_udp.dst_port),
+ format_udp_encap_fixup_flags, ue->ue_flags);
}
else
{
- s = format (s, "ip:[src:%U, dst:%U] udp:[src:%d dst:%d]",
- format_ip6_address,
- &ue->ue_hdrs.ip6.ue_ip6.src_address,
- format_ip6_address,
- &ue->ue_hdrs.ip6.ue_ip6.dst_address,
+ s = format (s, "ip:[src:%U, dst:%U] udp:[src:%d dst:%d] flags:%U",
+ format_ip6_address, &ue->ue_hdrs.ip6.ue_ip6.src_address,
+ format_ip6_address, &ue->ue_hdrs.ip6.ue_ip6.dst_address,
clib_net_to_host_u16 (ue->ue_hdrs.ip6.ue_udp.src_port),
- clib_net_to_host_u16 (ue->ue_hdrs.ip6.ue_udp.dst_port));
+ clib_net_to_host_u16 (ue->ue_hdrs.ip6.ue_udp.dst_port),
+ format_udp_encap_fixup_flags, ue->ue_flags);
}
vlib_get_combined_counter (&(udp_encap_counters), uei, &to);
s = format (s, " to:[%Ld:%Ld]]", to.packets, to.bytes);
@@ -553,10 +565,12 @@
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (udp_encap_add_command, static) = {
.path = "udp encap",
- .short_help = "udp encap [add|del] <id ID> <src-ip> <dst-ip> [<src-port>] <dst-port> [src-port-is-entropy] [table-id <table>]",
+ .short_help = "udp encap [add|del] <id ID> <src-ip> <dst-ip> [<src-port>] "
+ "<dst-port> [src-port-is-entropy] [table-id <table>]",
.function = udp_encap_cli,
.is_mp_safe = 1,
};
+
VLIB_CLI_COMMAND (udp_encap_show_command, static) = {
.path = "show udp encap",
.short_help = "show udp encap [ID]",