d29fa0856e
In addition to the struct fwd_ports used by both UDP and TCP to track port forwarding, UDP also included an 'rdelta' field, which contained the reverse mapping of the main port map. This was used so that we could properly direct reply packets to a forwarded packet where we change the destination port. This has now been taken over by the flow table: reply packets will match the flow of the originating packet, and that gives the correct ports on the originating side. So, eliminate the rdelta field, and with it struct udp_fwd_ports, which now has no additional information over struct fwd_ports. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright (c) 2021 Red Hat GmbH
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* Author: Stefano Brivio <sbrivio@redhat.com>
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*/
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#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_portmap_clear(void);
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void udp_buf_sock_handler(const struct ctx *c, union epoll_ref ref,
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uint32_t events, const struct timespec *now);
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void udp_reply_sock_handler(const struct ctx *c, union epoll_ref ref,
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uint32_t events, const struct timespec *now);
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int udp_tap_handler(const struct ctx *c, uint8_t pif,
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sa_family_t af, const void *saddr, const void *daddr,
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const struct pool *p, int idx, const struct timespec *now);
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int udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
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const void *addr, const char *ifname, in_port_t port);
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int udp_init(struct ctx *c);
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void udp_timer(struct ctx *c, const struct timespec *now);
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void udp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s);
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/**
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* union udp_epoll_ref - epoll reference portion for TCP connections
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* @port: Source port for connected sockets, bound port otherwise
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* @pif: pif for this socket
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* @orig: Set if a spliced socket which can originate "connections"
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* @v6: Set for IPv6 sockets or connections
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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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in_port_t port;
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uint8_t pif;
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bool orig:1,
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v6:1;
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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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* @fwd_in: Port forwarding configuration for inbound packets
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* @fwd_out: Port forwarding configuration for outbound packets
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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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struct fwd_ports fwd_in;
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struct fwd_ports fwd_out;
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struct timespec timer_run;
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};
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#endif /* UDP_H */
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