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Currently udp_flow_from_sock() is only used when receiving a datagram from a "listening" socket. It takes the listening socket's epoll reference to get the interface and port on which the datagram arrived. We have some upcoming cases where we want to use this in different contexts, so make it take the pif and port as direct parameters instead. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: Drop @ref from comment to udp_flow_from_sock()] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
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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* UDP flow tracking data structures
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*/
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#ifndef UDP_FLOW_H
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#define UDP_FLOW_H
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/**
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* struct udp_flow - Descriptor for a flow of UDP packets
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* @f: Generic flow information
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* @closed: Flow is already closed
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* @ts: Activity timestamp
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* @s: Socket fd (or -1) for each side of the flow
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* @ttl: TTL or hop_limit for both sides
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*/
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struct udp_flow {
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/* Must be first element */
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struct flow_common f;
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bool closed :1;
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time_t ts;
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int s[SIDES];
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uint8_t ttl[SIDES];
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};
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struct udp_flow *udp_at_sidx(flow_sidx_t sidx);
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flow_sidx_t udp_flow_from_sock(const struct ctx *c, uint8_t pif, in_port_t port,
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const union sockaddr_inany *s_in,
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const struct timespec *now);
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flow_sidx_t udp_flow_from_tap(const struct ctx *c,
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uint8_t pif, sa_family_t af,
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const void *saddr, const void *daddr,
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in_port_t srcport, in_port_t dstport,
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const struct timespec *now);
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void udp_flow_close(const struct ctx *c, struct udp_flow *uflow);
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bool udp_flow_defer(const struct udp_flow *uflow);
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bool udp_flow_timer(const struct ctx *c, struct udp_flow *uflow,
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const struct timespec *now);
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#endif /* UDP_FLOW_H */
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