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Currently TCP connections use a 1-bit selector, 'spliced', to determine the rest of the contents of the structure. We want to generalise the TCP connection table to other types of flows in other protocols. Make a start on this by replacing the tcp_conn_common structure with a new flow_common structure with an enum rather than a simple boolean indicating the type of flow. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
37 lines
813 B
C
37 lines
813 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright Red Hat
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* Author: David Gibson <david@gibson.dropbear.id.au>
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*
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* Tracking for logical "flows" of packets.
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*/
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#ifndef FLOW_H
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#define FLOW_H
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/**
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* enum flow_type - Different types of packet flows we track
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*/
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enum flow_type {
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/* Represents an invalid or unused flow */
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FLOW_TYPE_NONE = 0,
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/* A TCP connection between a socket and tap interface */
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FLOW_TCP,
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/* A TCP connection between a host socket and ns socket */
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FLOW_TCP_SPLICE,
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FLOW_NUM_TYPES,
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};
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extern const char *flow_type_str[];
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#define FLOW_TYPE(f) \
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((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
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/**
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* struct flow_common - Common fields for packet flows
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* @type: Type of packet flow
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*/
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struct flow_common {
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uint8_t type;
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};
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#endif /* FLOW_H */
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