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a7775e9550
Now that ICMP pass-through from socket-to-tap is in place, it is easy to support UDP based traceroute functionality in direction tap-to-socket. We fix that in this commit. Link: https://bugs.passt.top/show_bug.cgi?id=64 Signed-off-by: Jon Maloy <jmaloy@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> 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, union epoll_ref ref,
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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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