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Traffic with loopback source address will be forwarded to the direct loopback connection in the namespace, and the tap interface is used for the rest. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#ifndef UDP_H
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#define UDP_H
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#define UDP_TIMER_INTERVAL 1000 /* ms */
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void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
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struct timespec *now);
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int udp_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 udp_sock_init(struct ctx *c);
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void udp_timer(struct ctx *c, struct timespec *ts);
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void udp_update_l2_buf(unsigned char *eth_d, unsigned char *eth_s,
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uint32_t *ip_da);
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/**
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* union udp_epoll_ref - epoll reference portion for TCP connections
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* @bound: Set if this file descriptor is a bound socket
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* @splice: Set if descriptor is associated to "spliced" connection
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* @v6: Set for IPv6 sockets or connections
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* @port: Source port for connected sockets, bound port otherwise
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* @u32: Opaque u32 value of reference
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*/
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union udp_epoll_ref {
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struct {
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uint32_t bound:1,
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splice:3,
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#define UDP_TO_NS 1
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#define UDP_TO_INIT 2
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#define UDP_BACK_TO_NS 3
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#define UDP_BACK_TO_INIT 4
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v6:1,
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port:16;
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};
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uint32_t u32;
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};
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/**
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* struct udp_ctx - Execution context for UDP
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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 udp_ctx {
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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 /* UDP_H */
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