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tcp, udp: Split IPv4 and IPv6 bound port sets

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Allow to bind IPv4 and IPv6 ports to tap, namespace or init separately.

Port numbers of TCP ports that are bound in a namespace are also bound
for UDP for convenience (e.g. iperf3), and IPv4 ports are always bound
if the corresponding IPv6 port is bound (socket might not have the
IPV6_V6ONLY option set). This will also be configurable later.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
2021-07-21 17:44:39 +02:00
parent b508079c4c
commit 49631a38a6
5 changed files with 131 additions and 79 deletions
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18
tcp.h
View File

@@ -38,18 +38,24 @@ union tcp_epoll_ref {
* @hash_secret: 128-bit secret for hash functions, ISN and hash table
* @tap_conn_count: Count of tap connections in connection table
* @splice_conn_count: Count of spliced connections in connection table
* @port_to_tap: Ports bound host/init-side, packets to guest/tap
* @port_to_init: Ports bound namespace-side, spliced to init
* @port_to_ns: Ports bound init-side, spliced to namespace
* @port4_to_tap: IPv4 ports bound host/init-side, packets to guest/tap
* @port6_to_tap: IPv6 ports bound host/init-side, packets to guest/tap
* @port4_to_init: IPv4 ports bound namespace-side, spliced to init
* @port6_to_init: IPv6 ports bound namespace-side, spliced to init
* @port4_to_ns: IPv4 ports bound init-side, spliced to namespace
* @port6_to_ns: IPv6 ports bound init-side, spliced to namespace
* @timer_run: Timestamp of most recent timer run
*/
struct tcp_ctx {
uint64_t hash_secret[2];
int tap_conn_count;
int splice_conn_count;
uint8_t port_to_tap [USHRT_MAX / 8];
uint8_t port_to_init [USHRT_MAX / 8];
uint8_t port_to_ns [USHRT_MAX / 8];
uint8_t port4_to_tap [USHRT_MAX / 8];
uint8_t port6_to_tap [USHRT_MAX / 8];
uint8_t port4_to_init [USHRT_MAX / 8];
uint8_t port6_to_init [USHRT_MAX / 8];
uint8_t port4_to_ns [USHRT_MAX / 8];
uint8_t port6_to_ns [USHRT_MAX / 8];
struct timespec timer_run;
};