49631a38a6
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>
62 lines
2 KiB
C
62 lines
2 KiB
C
#ifndef TCP_H
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#define TCP_H
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#define TCP_TIMER_INTERVAL 20 /* ms */
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#define TCP_MAX_CONNS (128 * 1024)
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#define TCP_MAX_SOCKS (TCP_MAX_CONNS + USHRT_MAX * 2)
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struct ctx;
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void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
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struct timespec *now);
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int tcp_tap_handler(struct ctx *c, int af, void *addr,
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struct tap_msg *msg, int count, struct timespec *now);
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int tcp_sock_init(struct ctx *c);
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void tcp_timer(struct ctx *c, struct timespec *ts);
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/**
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* union tcp_epoll_ref - epoll reference portion for TCP connections
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* @listen: Set if this file descriptor is a listening socket
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* @splice: Set if descriptor is associated to a spliced connection
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* @v6: Set for IPv6 sockets or connections
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* @index: Index of connection in table, or port for bound sockets
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* @u32: Opaque u32 value of reference
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*/
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union tcp_epoll_ref {
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struct {
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uint32_t listen:1,
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splice:1,
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v6:1,
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index:20;
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};
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uint32_t u32;
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};
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/**
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* struct tcp_ctx - Execution context for TCP routines
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* @hash_secret: 128-bit secret for hash functions, ISN and hash table
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* @tap_conn_count: Count of tap connections in connection table
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* @splice_conn_count: Count of spliced connections in connection table
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* @port4_to_tap: IPv4 ports bound host/init-side, packets to guest/tap
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* @port6_to_tap: IPv6 ports bound host/init-side, packets to guest/tap
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* @port4_to_init: IPv4 ports bound namespace-side, spliced to init
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* @port6_to_init: IPv6 ports bound namespace-side, spliced to init
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* @port4_to_ns: IPv4 ports bound init-side, spliced to namespace
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* @port6_to_ns: IPv6 ports bound init-side, spliced to namespace
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* @timer_run: Timestamp of most recent timer run
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*/
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struct tcp_ctx {
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uint64_t hash_secret[2];
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int tap_conn_count;
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int splice_conn_count;
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uint8_t port4_to_tap [USHRT_MAX / 8];
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uint8_t port6_to_tap [USHRT_MAX / 8];
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uint8_t port4_to_init [USHRT_MAX / 8];
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uint8_t port6_to_init [USHRT_MAX / 8];
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uint8_t port4_to_ns [USHRT_MAX / 8];
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uint8_t port6_to_ns [USHRT_MAX / 8];
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struct timespec timer_run;
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};
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#endif /* TCP_H */
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