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/*
* include/haproxy/quic_sock.h
* This file contains declarations for QUIC sockets.
*
* Copyright 2020 Frederic Lecaille <flecaille@haproxy.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _HAPROXY_QUIC_SOCK_H
#define _HAPROXY_QUIC_SOCK_H
#ifdef USE_QUIC
#ifndef USE_OPENSSL
#error "Must define USE_OPENSSL"
#endif
#include <sys/socket.h>
#include <sys/types.h>
#include <haproxy/api.h>
#include <haproxy/connection-t.h>
#include <haproxy/listener-t.h>
#include <haproxy/quic_conn-t.h>
#include <haproxy/quic_sock-t.h>
int quic_session_accept(struct connection *cli_conn);
int quic_sock_get_src(struct connection *conn, struct sockaddr *addr, socklen_t len);
int quic_sock_get_dst(struct connection *conn, struct sockaddr *addr, socklen_t len);
int quic_sock_accepting_conn(const struct receiver *rx);
struct connection *quic_sock_accept_conn(struct listener *l, int *status);
struct task *quic_lstnr_dghdlr(struct task *t, void *ctx, unsigned int state);
void quic_lstnr_sock_fd_iocb(int fd);
int qc_snd_buf(struct quic_conn *qc, const struct buffer *buf, size_t count,
int flags);
int qc_rcv_buf(struct quic_conn *qc);
void quic_conn_sock_fd_iocb(int fd);
void qc_alloc_fd(struct quic_conn *qc, const struct sockaddr_storage *src,
const struct sockaddr_storage *dst);
void qc_release_fd(struct quic_conn *qc, int reinit);
void qc_want_recv(struct quic_conn *qc);
void quic_accept_push_qc(struct quic_conn *qc);
int quic_listener_max_handshake(const struct listener *l);
int quic_listener_max_accept(const struct listener *l);
/* Set default value for <qc> socket as uninitialized. */
static inline void qc_init_fd(struct quic_conn *qc)
{
qc->fd = -1;
}
/* Returns true if <qc> socket is initialized else false. */
static inline char qc_test_fd(struct quic_conn *qc)
{
/* quic-conn socket should not be accessed once it has been released. */
BUG_ON(qc->fd == DEAD_FD_MAGIC);
return qc->fd >= 0;
}
/* Try to increment <l> handshake current counter. If listener limit is
* reached, incrementation is rejected and 0 is returned.
*/
static inline int quic_increment_curr_handshake(struct listener *l)
{
unsigned int count, next;
const int max = quic_listener_max_handshake(l);
do {
count = l->rx.quic_curr_handshake;
if (count >= max) {
/* maxconn reached */
next = 0;
goto end;
}
/* try to increment quic_curr_handshake */
next = count + 1;
} while (!_HA_ATOMIC_CAS(&l->rx.quic_curr_handshake, &count, next) && __ha_cpu_relax());
end:
return next;
}
#endif /* USE_QUIC */
#endif /* _HAPROXY_QUIC_SOCK_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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