1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
* QUIC xprt layer. Act as an abstraction between quic_conn and MUX layers.
*
* Copyright 2020 HAProxy Technologies, Frederic Lecaille <flecaille@haproxy.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <haproxy/api.h>
#include <haproxy/connection.h>
#include <haproxy/quic_conn.h>
#include <haproxy/ssl_sock.h>
#include <haproxy/quic_trace.h>
#include <haproxy/trace.h>
static void quic_close(struct connection *conn, void *xprt_ctx)
{
struct ssl_sock_ctx *conn_ctx = xprt_ctx;
struct quic_conn *qc = conn_ctx->qc;
TRACE_ENTER(QUIC_EV_CONN_CLOSE, qc);
/* Next application data can be dropped. */
qc->mux_state = QC_MUX_RELEASED;
/* If the quic-conn timer has already expired or if already in "connection close"
* state, free the quic-conn.
*/
if (qc->flags & (QUIC_FL_CONN_EXP_TIMER|QUIC_FL_CONN_CLOSING)) {
quic_conn_release(qc);
qc = NULL;
goto leave;
}
/* Schedule a CONNECTION_CLOSE emission. If process stopping is in
* progress, quic-conn idle-timer will be scheduled immediately after
* its emission to ensure an immediate connection closing.
*/
qc_check_close_on_released_mux(qc);
leave:
TRACE_LEAVE(QUIC_EV_CONN_CLOSE, qc);
}
/* Called from the upper layer, to subscribe <es> to events <event_type>. The
* event subscriber <es> is not allowed to change from a previous call as long
* as at least one event is still subscribed. The <event_type> must only be a
* combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
*/
static int quic_conn_subscribe(struct connection *conn, void *xprt_ctx, int event_type, struct wait_event *es)
{
struct quic_conn *qc = conn->handle.qc;
TRACE_ENTER(QUIC_EV_CONN_SUB, qc);
BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
BUG_ON(qc->subs && qc->subs != es);
es->events |= event_type;
qc->subs = es;
/* TODO implement a check_events to detect if subscriber should be
* woken up immediately ?
*/
if (event_type & SUB_RETRY_RECV)
TRACE_DEVEL("subscribe(recv)", QUIC_EV_CONN_XPRTRECV, qc);
if (event_type & SUB_RETRY_SEND)
TRACE_DEVEL("subscribe(send)", QUIC_EV_CONN_XPRTSEND, qc);
TRACE_LEAVE(QUIC_EV_CONN_SUB, qc);
return 0;
}
/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
* The <es> pointer is not allowed to differ from the one passed to the
* subscribe() call. It always returns zero.
*/
static int quic_conn_unsubscribe(struct connection *conn, void *xprt_ctx, int event_type, struct wait_event *es)
{
struct quic_conn *qc = conn->handle.qc;
TRACE_ENTER(QUIC_EV_CONN_SUB, qc);
if (event_type & SUB_RETRY_RECV)
TRACE_DEVEL("unsubscribe(recv)", QUIC_EV_CONN_XPRTRECV, qc);
if (event_type & SUB_RETRY_SEND)
TRACE_DEVEL("unsubscribe(send)", QUIC_EV_CONN_XPRTSEND, qc);
es->events &= ~event_type;
if (!es->events)
qc->subs = NULL;
/* TODO implement ignore_events similar to conn_unsubscribe() ? */
TRACE_LEAVE(QUIC_EV_CONN_SUB, qc);
return 0;
}
/* Store in <xprt_ctx> the context attached to <conn>.
* Returns always 0.
*/
static int qc_conn_init(struct connection *conn, void **xprt_ctx)
{
struct quic_conn *qc = conn->handle.qc;
TRACE_ENTER(QUIC_EV_CONN_NEW, qc);
/* Ensure thread connection migration is finalized ASAP. */
if (qc->flags & QUIC_FL_CONN_AFFINITY_CHANGED)
qc_finalize_affinity_rebind(qc);
/* do not store the context if already set */
if (*xprt_ctx)
goto out;
*xprt_ctx = qc->xprt_ctx;
out:
TRACE_LEAVE(QUIC_EV_CONN_NEW, qc);
return 0;
}
/* Start the QUIC transport layer */
static int qc_xprt_start(struct connection *conn, void *ctx)
{
int ret = 0;
struct quic_conn *qc;
qc = conn->handle.qc;
TRACE_ENTER(QUIC_EV_CONN_NEW, qc);
/* mux-quic can now be considered ready. */
qc->mux_state = QC_MUX_READY;
/* Schedule quic-conn to ensure post handshake frames are emitted. This
* is not done for 0-RTT as xprt->start happens before handshake
* completion.
*/
if (qc->flags & QUIC_FL_CONN_NEED_POST_HANDSHAKE_FRMS)
tasklet_wakeup(qc->wait_event.tasklet);
ret = 1;
out:
TRACE_LEAVE(QUIC_EV_CONN_NEW, qc);
return ret;
}
static struct ssl_sock_ctx *qc_get_ssl_sock_ctx(struct connection *conn)
{
if (!conn || conn->xprt != xprt_get(XPRT_QUIC) || !conn->handle.qc || !conn->xprt_ctx)
return NULL;
return conn->handle.qc->xprt_ctx;
}
/* transport-layer operations for QUIC connections. */
static struct xprt_ops ssl_quic = {
.close = quic_close,
.subscribe = quic_conn_subscribe,
.unsubscribe = quic_conn_unsubscribe,
.init = qc_conn_init,
.start = qc_xprt_start,
.prepare_bind_conf = ssl_sock_prepare_bind_conf,
.destroy_bind_conf = ssl_sock_destroy_bind_conf,
.get_alpn = ssl_sock_get_alpn,
.get_ssl_sock_ctx = qc_get_ssl_sock_ctx,
.name = "QUIC",
};
static void __quic_conn_init(void)
{
xprt_register(XPRT_QUIC, &ssl_quic);
}
INITCALL0(STG_REGISTER, __quic_conn_init);
|
