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conf, tcp: Periodic detection of bound ports for pasta port forwarding

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Detecting bound ports at start-up time isn't terribly useful: do this
periodically instead, if configured.

This is only implemented for TCP at the moment, UDP is somewhat more
complicated: leave a TODO there.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
2021-09-27 05:24:30 +02:00
parent e69e13671d
commit 9657b6ed05
8 changed files with 316 additions and 97 deletions
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4
udp.h
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@@ -40,12 +40,16 @@ union udp_epoll_ref {
/**
* struct udp_ctx - Execution context for UDP
* @port_to_tap: Ports bound host-side, data to tap or ns L4 socket
* @init_detect_ports: If set, periodically detect ports bound in init (TODO)
* @port_to_init: Ports bound namespace-side, data to init L4 socket
* @ns_detect_ports: If set, periodically detect ports bound in namespace
* @timer_run: Timestamp of most recent timer run
*/
struct udp_ctx {
uint8_t port_to_tap [USHRT_MAX / 8];
int init_detect_ports;
uint8_t port_to_init [USHRT_MAX / 8];
int ns_detect_ports;
struct timespec timer_run;
};