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authorNathan Skrzypczak <nathan.skrzypczak@gmail.com>2021-09-09 18:31:36 +0200
committerNeale Ranns <neale@graphiant.com>2021-10-21 16:39:37 +0000
commitbfa86084af0e4d0cc8ad8ccbeafe999b748a990e (patch)
tree2b2f072cd1b46dde857188c8f9cd11600d2c8409 /src/vnet/buffer.h
parent1b6fb40bad69a6582e2a9a7ff8d3bcb65ddfe8ad (diff)
ip: Add ip46-local node for local swif[rx]
Type: improvement This adds a new ip[46]-receive node, sibling of ip[46]-local. Its goal is to set vnet_buffer (b)->ip.rx_sw_if_index to the sw_if_index of the local interface. In dependant nodes further down the line (e.g. hoststack) we then set sw_if_idx[rx] to this value. So that we know which local interface did receive the packet. The TCP issue this fixes is that : On accepts, we were setting tc->sw_if_index to the source sw_if_index. We should use the dest sw_if_index, so that packets coming back on this connection have the right source sw_if_index. And also setting it in the tx-ed packet. Change-Id: I569ed673e15c21e71f365c3ad45439b05bd14a9f Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Diffstat (limited to 'src/vnet/buffer.h')
-rw-r--r--src/vnet/buffer.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index cbaf4d84e42..2b3152fbcd6 100644
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -190,8 +190,17 @@ typedef struct
/* Rewrite length */
u8 save_rewrite_length;
- /* MFIB RPF ID */
- u32 rpf_id;
+ union
+ {
+ /* sw_if_index of the local interface the buffer was received on
+ * - if hitting a DPO_RECEIVE - it is set in ip[46]-receive.
+ * This is ~0 if the dpo is not a receive dpo, or if the
+ * interface is not specified (e.g. route add via local) */
+ u32 rx_sw_if_index;
+
+ /* MFIB RPF ID */
+ u32 rpf_id;
+ };
};
/* ICMP */