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authorPierre Pfister <ppfister@cisco.com>2017-09-20 08:48:36 +0200
committerDave Wallace <dwallacelf@gmail.com>2017-09-20 13:43:36 +0000
commit7fe51f3e3e80ed6ffe989df1c6963527166afc25 (patch)
tree4b007227cfb4949066901cbaca6a1158e235303a /src/vnet/ip
parent440751b91804947a7c9b533570531cac79629016 (diff)
tcp: add option to punt traffic
Until now, if the stack didn't find a connection for a packet, it sent back a reset. With the punt option enabled, packets are now enqueued to error-punt where they can be handed off to the host os. Change-Id: I12dea8694b8bd24c92b0d601412928aa7b8046cb Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Pierre Pfister <ppfister@cisco.com>
Diffstat (limited to 'src/vnet/ip')
-rw-r--r--src/vnet/ip/punt.c66
1 files changed, 42 insertions, 24 deletions
diff --git a/src/vnet/ip/punt.c b/src/vnet/ip/punt.c
index 1ea32fa0c78..0869954c283 100644
--- a/src/vnet/ip/punt.c
+++ b/src/vnet/ip/punt.c
@@ -26,6 +26,7 @@
#include <vlib/vlib.h>
#include <vnet/pg/pg.h>
#include <vnet/udp/udp.h>
+#include <vnet/tcp/tcp.h>
#include <vnet/ip/punt.h>
#include <vppinfra/sparse_vec.h>
#include <vlib/unix/unix.h>
@@ -613,16 +614,15 @@ vnet_punt_socket_del (vlib_main_t * vm, bool is_ip4, u8 l4_protocol, u16 port)
* @brief Request IP traffic punt to the local TCP/IP stack.
*
* @em Note
- * - UDP is the only protocol supported in the current implementation
- * - When requesting UDP punt port number(s) must be specified
- * - All TCP traffic is currently punted to the host by default
+ * - UDP and TCP are the only protocols supported in the current implementation
*
* @param vm vlib_main_t corresponding to the current thread
* @param ipv IP protcol version.
* 4 - IPv4, 6 - IPv6, ~0 for both IPv6 and IPv4
* @param protocol 8-bits L4 protocol value
- * Only value of 17 (UDP) is currently supported
- * @param port 16-bits L4 (TCP/IP) port number when applicable
+ * UDP is 17
+ * TCP is 1
+ * @param port 16-bits L4 (TCP/IP) port number when applicable (UDP only)
*
* @returns 0 on success, non-zero value otherwise
*/
@@ -630,28 +630,42 @@ clib_error_t *
vnet_punt_add_del (vlib_main_t * vm, u8 ipv, u8 protocol, u16 port,
bool is_add)
{
+
/* For now we only support UDP punt */
- if (protocol != IP_PROTOCOL_UDP)
+ if (protocol != IP_PROTOCOL_UDP && protocol != IP_PROTOCOL_TCP)
return clib_error_return (0,
- "only UDP protocol (%d) is supported, got %d",
- IP_PROTOCOL_UDP, protocol);
+ "only UDP (%d) and TCP (%d) protocols are supported, got %d",
+ IP_PROTOCOL_UDP, IP_PROTOCOL_TCP, protocol);
if (ipv != (u8) ~ 0 && ipv != 4 && ipv != 6)
return clib_error_return (0, "IP version must be 4 or 6, got %d", ipv);
if (port == (u16) ~ 0)
{
- if (ipv == 4 || ipv == (u8) ~ 0)
- udp_punt_unknown (vm, 1, is_add);
+ if ((ipv == 4) || (ipv == (u8) ~ 0))
+ {
+ if (protocol == IP_PROTOCOL_UDP)
+ udp_punt_unknown (vm, 1, is_add);
+ else if (protocol == IP_PROTOCOL_TCP)
+ tcp_punt_unknown (vm, 1, is_add);
+ }
- if (ipv == 6 || ipv == (u8) ~ 0)
- udp_punt_unknown (vm, 0, is_add);
+ if ((ipv == 6) || (ipv == (u8) ~ 0))
+ {
+ if (protocol == IP_PROTOCOL_UDP)
+ udp_punt_unknown (vm, 0, is_add);
+ else if (protocol == IP_PROTOCOL_TCP)
+ tcp_punt_unknown (vm, 0, is_add);
+ }
return 0;
}
else if (is_add)
{
+ if (protocol == IP_PROTOCOL_TCP)
+ return clib_error_return (0, "punt TCP ports is not supported yet");
+
if (ipv == 4 || ipv == (u8) ~ 0)
udp_register_dst_port (vm, port, udp4_punt_node.index, 1);
@@ -665,32 +679,36 @@ vnet_punt_add_del (vlib_main_t * vm, u8 ipv, u8 protocol, u16 port,
}
static clib_error_t *
-udp_punt_cli (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
+punt_cli (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- u32 udp_port;
+ u32 port;
bool is_add = true;
+ u32 protocol = ~0;
clib_error_t *error;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "del"))
is_add = false;
- if (unformat (input, "all"))
+ else if (unformat (input, "all"))
{
/* punt both IPv6 and IPv4 when used in CLI */
- error = vnet_punt_add_del (vm, ~0, IP_PROTOCOL_UDP, ~0, is_add);
+ error = vnet_punt_add_del (vm, ~0, protocol, ~0, is_add);
if (error)
clib_error_report (error);
}
- else if (unformat (input, "%d", &udp_port))
+ else if (unformat (input, "%d", &port))
{
/* punt both IPv6 and IPv4 when used in CLI */
- error =
- vnet_punt_add_del (vm, ~0, IP_PROTOCOL_UDP, udp_port, is_add);
+ error = vnet_punt_add_del (vm, ~0, protocol, port, is_add);
if (error)
clib_error_report (error);
}
+ else if (unformat (input, "udp"))
+ protocol = IP_PROTOCOL_UDP;
+ else if (unformat (input, "tcp"))
+ protocol = IP_PROTOCOL_TCP;
}
return 0;
@@ -717,10 +735,10 @@ udp_punt_cli (vlib_main_t * vm,
* @endparblock
?*/
/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (punt_udp_command, static) = {
- .path = "set punt udp",
- .short_help = "set punt udp [del] <all | port-num1 [port-num2 ...]>",
- .function = udp_punt_cli,
+VLIB_CLI_COMMAND (punt_command, static) = {
+ .path = "set punt",
+ .short_help = "set punt [udp|tcp] [del] <all | port-num1 [port-num2 ...]>",
+ .function = punt_cli,
};
/* *INDENT-ON* */