9ecf7fedc5
Consolidate pool_tap4() and pool_tap6() into tap_flush_pools(), and tap4_handler() and tap6_handler() into tap_handler(). Create a generic tap_add_packet() to consolidate packet addition logic and reduce code duplication. The purpose is to ease the export of these functions to use them with the vhost-user backend. Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Copyright (c) 2021 Red Hat GmbH
|
|
* Author: Stefano Brivio <sbrivio@redhat.com>
|
|
*/
|
|
|
|
#ifndef TAP_H
|
|
#define TAP_H
|
|
|
|
#define ETH_HDR_INIT(proto) { .h_proto = htons_constant(proto) }
|
|
|
|
/**
|
|
* struct tap_hdr - tap backend specific headers
|
|
* @vnet_len: Frame length (for qemu socket transport)
|
|
*/
|
|
struct tap_hdr {
|
|
uint32_t vnet_len;
|
|
} __attribute__((packed));
|
|
|
|
/**
|
|
* tap_hdr_iov() - struct iovec for a tap header
|
|
* @c: Execution context
|
|
* @taph: Pointer to tap specific header buffer
|
|
*
|
|
* Returns: A struct iovec covering the correct portion of @taph to use as the
|
|
* tap specific header in the current configuration.
|
|
*/
|
|
static inline struct iovec tap_hdr_iov(const struct ctx *c,
|
|
struct tap_hdr *thdr)
|
|
{
|
|
return (struct iovec){
|
|
.iov_base = thdr,
|
|
.iov_len = c->mode == MODE_PASST ? sizeof(*thdr) : 0,
|
|
};
|
|
}
|
|
|
|
/**
|
|
* tap_hdr_update() - Update the tap specific header for a frame
|
|
* @taph: Tap specific header buffer to update
|
|
* @l2len: Frame length (including L2 headers)
|
|
*/
|
|
static inline void tap_hdr_update(struct tap_hdr *thdr, size_t l2len)
|
|
{
|
|
thdr->vnet_len = htonl(l2len);
|
|
}
|
|
|
|
struct in_addr tap_ip4_daddr(const struct ctx *c);
|
|
void tap_udp4_send(const struct ctx *c, struct in_addr src, in_port_t sport,
|
|
struct in_addr dst, in_port_t dport,
|
|
const void *in, size_t dlen);
|
|
void tap_icmp4_send(const struct ctx *c, struct in_addr src, struct in_addr dst,
|
|
const void *in, size_t l4len);
|
|
const struct in6_addr *tap_ip6_daddr(const struct ctx *c,
|
|
const struct in6_addr *src);
|
|
void tap_udp6_send(const struct ctx *c,
|
|
const struct in6_addr *src, in_port_t sport,
|
|
const struct in6_addr *dst, in_port_t dport,
|
|
uint32_t flow, const void *in, size_t dlen);
|
|
void tap_icmp6_send(const struct ctx *c,
|
|
const struct in6_addr *src, const struct in6_addr *dst,
|
|
const void *in, size_t l4len);
|
|
void tap_send_single(const struct ctx *c, const void *data, size_t l2len);
|
|
size_t tap_send_frames(const struct ctx *c, const struct iovec *iov,
|
|
size_t bufs_per_frame, size_t nframes);
|
|
void eth_update_mac(struct ethhdr *eh,
|
|
const unsigned char *eth_d, const unsigned char *eth_s);
|
|
void tap_listen_handler(struct ctx *c, uint32_t events);
|
|
void tap_handler_pasta(struct ctx *c, uint32_t events,
|
|
const struct timespec *now);
|
|
void tap_handler_passt(struct ctx *c, uint32_t events,
|
|
const struct timespec *now);
|
|
int tap_sock_unix_open(char *sock_path);
|
|
void tap_sock_init(struct ctx *c);
|
|
void tap_flush_pools(void);
|
|
void tap_handler(struct ctx *c, const struct timespec *now);
|
|
void tap_add_packet(struct ctx *c, ssize_t l2len, char *p);
|
|
|
|
#endif /* TAP_H */
|