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xprt_quic.c
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/*
* QUIC transport layer over SOCK_DGRAM sockets.
*
* Copyright 2020 HAProxy Technologies, Frédéric Lécaille <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.
*
*/
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <netinet/tcp.h>
#include <haproxy/buf-t.h>
#include <haproxy/compat.h>
#include <haproxy/api.h>
#include <haproxy/debug.h>
#include <haproxy/tools.h>
#include <haproxy/ticks.h>
#include <haproxy/time.h>
#include <haproxy/connection.h>
#include <haproxy/fd.h>
#include <haproxy/freq_ctr.h>
#include <haproxy/global.h>
#include <haproxy/log.h>
#include <haproxy/pipe.h>
#include <haproxy/proxy.h>
#include <haproxy/quic_cc.h>
#include <haproxy/quic_frame.h>
#include <haproxy/quic_loss.h>
#include <haproxy/quic_tls.h>
#include <haproxy/ssl_sock.h>
#include <haproxy/stream_interface.h>
#include <haproxy/task.h>
#include <haproxy/trace.h>
#include <haproxy/xprt_quic.h>
struct quic_transport_params quic_dflt_transport_params = {
.max_packet_size = QUIC_DFLT_MAX_PACKET_SIZE,
.ack_delay_exponent = QUIC_DFLT_ACK_DELAY_COMPONENT,
.max_ack_delay = QUIC_DFLT_MAX_ACK_DELAY,
};
/* trace source and events */
static void quic_trace(enum trace_level level, uint64_t mask, \
const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4);
static const struct trace_event quic_trace_events[] = {
{ .mask = QUIC_EV_CONN_NEW, .name = "new_conn", .desc = "new QUIC connection" },
{ .mask = QUIC_EV_CONN_INIT, .name = "new_conn_init", .desc = "new QUIC connection initialization" },
{ .mask = QUIC_EV_CONN_ISEC, .name = "init_secs", .desc = "initial secrets derivation" },
{ .mask = QUIC_EV_CONN_RSEC, .name = "read_secs", .desc = "read secrets derivation" },
{ .mask = QUIC_EV_CONN_WSEC, .name = "write_secs", .desc = "write secrets derivation" },
{ .mask = QUIC_EV_CONN_LPKT, .name = "lstnr_packet", .desc = "new listener received packet" },
{ .mask = QUIC_EV_CONN_SPKT, .name = "srv_packet", .desc = "new server received packet" },
{ .mask = QUIC_EV_CONN_ENCPKT, .name = "enc_hdshk_pkt", .desc = "handhshake packet encryption" },
{ .mask = QUIC_EV_CONN_HPKT, .name = "hdshk_pkt", .desc = "handhshake packet building" },
{ .mask = QUIC_EV_CONN_PAPKT, .name = "phdshk_apkt", .desc = "post handhshake application packet preparation" },
{ .mask = QUIC_EV_CONN_PAPKTS, .name = "phdshk_apkts", .desc = "post handhshake application packets preparation" },
{ .mask = QUIC_EV_CONN_HDSHK, .name = "hdshk", .desc = "SSL handhshake processing" },
{ .mask = QUIC_EV_CONN_RMHP, .name = "rm_hp", .desc = "Remove header protection" },
{ .mask = QUIC_EV_CONN_PRSHPKT, .name = "parse_hpkt", .desc = "parse handshake packet" },
{ .mask = QUIC_EV_CONN_PRSAPKT, .name = "parse_apkt", .desc = "parse application packet" },
{ .mask = QUIC_EV_CONN_PRSFRM, .name = "parse_frm", .desc = "parse frame" },
{ .mask = QUIC_EV_CONN_PRSAFRM, .name = "parse_ack_frm", .desc = "parse ACK frame" },
{ .mask = QUIC_EV_CONN_BFRM, .name = "build_frm", .desc = "build frame" },
{ .mask = QUIC_EV_CONN_PHPKTS, .name = "phdshk_pkts", .desc = "handhshake packets preparation" },
{ .mask = QUIC_EV_CONN_TRMHP, .name = "rm_hp_try", .desc = "header protection removing try" },
{ .mask = QUIC_EV_CONN_ELRMHP, .name = "el_rm_hp", .desc = "handshake enc. level header protection removing" },
{ .mask = QUIC_EV_CONN_ELRXPKTS, .name = "el_treat_rx_pkts", .desc = "handshake enc. level rx packets treatment" },
{ .mask = QUIC_EV_CONN_SSLDATA, .name = "ssl_provide_data", .desc = "CRYPTO data provision to TLS stack" },
{ .mask = QUIC_EV_CONN_RXCDATA, .name = "el_treat_rx_cfrms",.desc = "enc. level RX CRYPTO frames processing"},
{ .mask = QUIC_EV_CONN_ADDDATA, .name = "add_hdshk_data", .desc = "TLS stack ->add_handshake_data() call"},
{ .mask = QUIC_EV_CONN_FFLIGHT, .name = "flush_flight", .desc = "TLS stack ->flush_flight() call"},
{ .mask = QUIC_EV_CONN_SSLALERT, .name = "send_alert", .desc = "TLS stack ->send_alert() call"},
{ .mask = QUIC_EV_CONN_RTTUPDT, .name = "rtt_updt", .desc = "RTT sampling" },
{ .mask = QUIC_EV_CONN_SPPKTS, .name = "sppkts", .desc = "send prepared packets" },
{ .mask = QUIC_EV_CONN_PKTLOSS, .name = "pktloss", .desc = "detect packet loss" },
{ .mask = QUIC_EV_CONN_STIMER, .name = "stimer", .desc = "set timer" },
{ .mask = QUIC_EV_CONN_PTIMER, .name = "ptimer", .desc = "process timer" },
{ .mask = QUIC_EV_CONN_SPTO, .name = "spto", .desc = "set PTO" },
{ .mask = QUIC_EV_CONN_BCFRMS, .name = "bcfrms", .desc = "build CRYPTO data frames" },
{ /* end */ }
};
static const struct name_desc quic_trace_lockon_args[4] = {
/* arg1 */ { /* already used by the connection */ },
/* arg2 */ { .name="quic", .desc="QUIC transport" },
/* arg3 */ { },
/* arg4 */ { }
};
static const struct name_desc quic_trace_decoding[] = {
#define QUIC_VERB_CLEAN 1
{ .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
{ /* end */ }
};
struct trace_source trace_quic = {
.name = IST("quic"),
.desc = "QUIC xprt",
.arg_def = TRC_ARG1_CONN, /* TRACE()'s first argument is always a connection */
.default_cb = quic_trace,
.known_events = quic_trace_events,
.lockon_args = quic_trace_lockon_args,
.decoding = quic_trace_decoding,
.report_events = ~0, /* report everything by default */
};
#define TRACE_SOURCE &trace_quic
INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
static BIO_METHOD *ha_quic_meth;
/* QUIC xprt connection context. */
struct quic_conn_ctx {
struct connection *conn;
SSL *ssl;
BIO *bio;
int state;
const struct xprt_ops *xprt;
void *xprt_ctx;
struct wait_event wait_event;
struct wait_event *subs;
};
DECLARE_STATIC_POOL(pool_head_quic_conn_ctx,
"quic_conn_ctx_pool", sizeof(struct quic_conn_ctx));
DECLARE_STATIC_POOL(pool_head_quic_conn, "quic_conn", sizeof(struct quic_conn));
DECLARE_POOL(pool_head_quic_connection_id,
"quic_connnection_id_pool", sizeof(struct quic_connection_id));
DECLARE_POOL(pool_head_quic_rx_packet, "quic_rx_packet_pool", sizeof(struct quic_rx_packet));
DECLARE_POOL(pool_head_quic_tx_packet, "quic_tx_packet_pool", sizeof(struct quic_tx_packet));
DECLARE_STATIC_POOL(pool_head_quic_rx_crypto_frm, "quic_rx_crypto_frm_pool", sizeof(struct quic_rx_crypto_frm));
DECLARE_POOL(pool_head_quic_tx_frm, "quic_tx_frm_pool", sizeof(struct quic_tx_frm));
DECLARE_STATIC_POOL(pool_head_quic_crypto_buf, "quic_crypto_buf_pool", sizeof(struct quic_crypto_buf));
DECLARE_STATIC_POOL(pool_head_quic_frame, "quic_frame_pool", sizeof(struct quic_frame));
DECLARE_STATIC_POOL(pool_head_quic_arng, "quic_arng_pool", sizeof(struct quic_arng_node));
static ssize_t qc_build_hdshk_pkt(struct q_buf *buf, struct quic_conn *qc, int pkt_type,
struct quic_enc_level *qel);
int qc_prep_phdshk_pkts(struct quic_conn *qc);
/* Add traces to <buf> depending on <frm> TX frame type. */
static inline void chunk_tx_frm_appendf(struct buffer *buf,
const struct quic_tx_frm *frm)
{
switch (frm->type) {
case QUIC_FT_CRYPTO:
chunk_appendf(buf, " cfoff=%llu cflen=%llu",
(unsigned long long)frm->crypto.offset,
(unsigned long long)frm->crypto.len);
break;
default:
chunk_appendf(buf, " %s", quic_frame_type_string(frm->type));
}
}
/* Only for debug purpose */
struct enc_debug_info {
unsigned char *payload;
size_t payload_len;
unsigned char *aad;
size_t aad_len;
uint64_t pn;
};
/* Initializes a enc_debug_info struct (only for debug purpose) */
static inline void enc_debug_info_init(struct enc_debug_info *edi,
unsigned char *payload, size_t payload_len,
unsigned char *aad, size_t aad_len, uint64_t pn)
{
edi->payload = payload;
edi->payload_len = payload_len;
edi->aad = aad;
edi->aad_len = aad_len;
edi->pn = pn;
}
/* Trace callback for QUIC.
* These traces always expect that arg1, if non-null, is of type connection.
*/
static void quic_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4)
{
const struct connection *conn = a1;
if (conn) {
struct quic_tls_secrets *secs;
struct quic_conn *qc;
qc = conn->qc;
chunk_appendf(&trace_buf, " : conn@%p", conn);
if ((mask & QUIC_EV_CONN_INIT) && qc) {
chunk_appendf(&trace_buf, "\n odcid");
quic_cid_dump(&trace_buf, &qc->odcid);
chunk_appendf(&trace_buf, "\n dcid");
quic_cid_dump(&trace_buf, &qc->dcid);
chunk_appendf(&trace_buf, "\n scid");
quic_cid_dump(&trace_buf, &qc->scid);
}
if (mask & QUIC_EV_CONN_ADDDATA) {
const enum ssl_encryption_level_t *level = a2;
const size_t *len = a3;
if (level) {
enum quic_tls_enc_level lvl = ssl_to_quic_enc_level(*level);
chunk_appendf(&trace_buf, " el=%c(%d)", quic_enc_level_char(lvl), lvl);
}
if (len)
chunk_appendf(&trace_buf, " len=%llu", (unsigned long long)*len);
}
if ((mask & QUIC_EV_CONN_ISEC) && qc) {
/* Initial read & write secrets. */
enum quic_tls_enc_level level = QUIC_TLS_ENC_LEVEL_INITIAL;
const unsigned char *rx_sec = a2;
const unsigned char *tx_sec = a3;
secs = &qc->els[level].tls_ctx.rx;
if (secs->flags & QUIC_FL_TLS_SECRETS_SET) {
chunk_appendf(&trace_buf, "\n RX el=%c", quic_enc_level_char(level));
if (rx_sec)
quic_tls_secret_hexdump(&trace_buf, rx_sec, 32);
quic_tls_keys_hexdump(&trace_buf, secs);
}
secs = &qc->els[level].tls_ctx.tx;
if (secs->flags & QUIC_FL_TLS_SECRETS_SET) {
chunk_appendf(&trace_buf, "\n TX el=%c", quic_enc_level_char(level));
if (tx_sec)
quic_tls_secret_hexdump(&trace_buf, tx_sec, 32);
quic_tls_keys_hexdump(&trace_buf, secs);
}
}
if (mask & (QUIC_EV_CONN_RSEC|QUIC_EV_CONN_RWSEC)) {
const enum ssl_encryption_level_t *level = a2;
const unsigned char *secret = a3;
const size_t *secret_len = a4;
if (level) {
enum quic_tls_enc_level lvl = ssl_to_quic_enc_level(*level);
chunk_appendf(&trace_buf, "\n RX el=%c", quic_enc_level_char(lvl));
if (secret && secret_len)
quic_tls_secret_hexdump(&trace_buf, secret, *secret_len);
secs = &qc->els[lvl].tls_ctx.rx;
if (secs->flags & QUIC_FL_TLS_SECRETS_SET)
quic_tls_keys_hexdump(&trace_buf, secs);
}
}
if (mask & (QUIC_EV_CONN_WSEC|QUIC_EV_CONN_RWSEC)) {
const enum ssl_encryption_level_t *level = a2;
const unsigned char *secret = a3;
const size_t *secret_len = a4;
if (level) {
enum quic_tls_enc_level lvl = ssl_to_quic_enc_level(*level);
chunk_appendf(&trace_buf, "\n TX el=%c", quic_enc_level_char(lvl));
if (secret && secret_len)
quic_tls_secret_hexdump(&trace_buf, secret, *secret_len);
secs = &qc->els[lvl].tls_ctx.tx;
if (secs->flags & QUIC_FL_TLS_SECRETS_SET)
quic_tls_keys_hexdump(&trace_buf, secs);
}
}
if (mask & (QUIC_EV_CONN_HPKT|QUIC_EV_CONN_PAPKT)) {
const struct quic_tx_packet *pkt = a2;
const struct quic_enc_level *qel = a3;
const ssize_t *room = a4;
if (qel) {
struct quic_pktns *pktns;
pktns = qc->pktns;
chunk_appendf(&trace_buf, " qel=%c cwnd=%llu ppif=%lld pif=%llu "
"if=%llu pp=%u pdg=%d",
quic_enc_level_char_from_qel(qel, qc),
(unsigned long long)qc->path->cwnd,
(unsigned long long)qc->path->prep_in_flight,
(unsigned long long)qc->path->in_flight,
(unsigned long long)pktns->tx.in_flight,
pktns->tx.pto_probe, qc->tx.nb_pto_dgrams);
}
if (pkt) {
const struct quic_tx_frm *frm;
chunk_appendf(&trace_buf, " pn=%llu cdlen=%u",
(unsigned long long)pkt->pn_node.key, pkt->cdata_len);
list_for_each_entry(frm, &pkt->frms, list)
chunk_tx_frm_appendf(&trace_buf, frm);
chunk_appendf(&trace_buf, " tx.bytes=%llu", (unsigned long long)qc->tx.bytes);
}
if (room) {
chunk_appendf(&trace_buf, " room=%lld", (long long)*room);
chunk_appendf(&trace_buf, " dcid.len=%llu scid.len=%llu",
(unsigned long long)qc->dcid.len, (unsigned long long)qc->scid.len);
}
}
if (mask & QUIC_EV_CONN_HDSHK) {
const enum quic_handshake_state *state = a2;
const int *err = a3;
if (state)
chunk_appendf(&trace_buf, " state=%s", quic_hdshk_state_str(*state));
if (err)
chunk_appendf(&trace_buf, " err=%s", ssl_error_str(*err));
}
if (mask & (QUIC_EV_CONN_TRMHP|QUIC_EV_CONN_ELRMHP|QUIC_EV_CONN_SPKT)) {
const struct quic_rx_packet *pkt = a2;
const unsigned long *pktlen = a3;
const SSL *ssl = a4;
if (pkt) {
chunk_appendf(&trace_buf, " pkt@%p el=%c",
pkt, quic_packet_type_enc_level_char(pkt->type));
if (pkt->pnl)
chunk_appendf(&trace_buf, " pnl=%u pn=%llu", pkt->pnl,
(unsigned long long)pkt->pn);
if (pkt->token_len)
chunk_appendf(&trace_buf, " toklen=%llu",
(unsigned long long)pkt->token_len);
if (pkt->aad_len)
chunk_appendf(&trace_buf, " aadlen=%llu",
(unsigned long long)pkt->aad_len);
chunk_appendf(&trace_buf, " flags=0x%x len=%llu",
pkt->flags, (unsigned long long)pkt->len);
}
if (pktlen)
chunk_appendf(&trace_buf, " (%ld)", *pktlen);
if (ssl) {
enum ssl_encryption_level_t level = SSL_quic_read_level(ssl);
chunk_appendf(&trace_buf, " el=%c",
quic_enc_level_char(ssl_to_quic_enc_level(level)));
}
}
if (mask & (QUIC_EV_CONN_ELRXPKTS|QUIC_EV_CONN_PRSHPKT|QUIC_EV_CONN_SSLDATA)) {
const struct quic_rx_packet *pkt = a2;
const struct quic_rx_crypto_frm *cf = a3;
const SSL *ssl = a4;
if (pkt)
chunk_appendf(&trace_buf, " pkt@%p el=%c pn=%llu", pkt,
quic_packet_type_enc_level_char(pkt->type),
(unsigned long long)pkt->pn);
if (cf)
chunk_appendf(&trace_buf, " cfoff=%llu cflen=%llu",
(unsigned long long)cf->offset_node.key,
(unsigned long long)cf->len);
if (ssl) {
enum ssl_encryption_level_t level = SSL_quic_read_level(ssl);
chunk_appendf(&trace_buf, " el=%c",
quic_enc_level_char(ssl_to_quic_enc_level(level)));
}
}
if (mask & (QUIC_EV_CONN_PRSFRM|QUIC_EV_CONN_BFRM)) {
const struct quic_frame *frm = a2;
if (frm)
chunk_appendf(&trace_buf, " %s", quic_frame_type_string(frm->type));
}
if (mask & QUIC_EV_CONN_PHPKTS) {
const struct quic_enc_level *qel = a2;
if (qel) {
struct quic_pktns *pktns;
pktns = qc->pktns;
chunk_appendf(&trace_buf,
" qel=%c ack?%d cwnd=%llu ppif=%lld pif=%llu if=%llu pp=%u pdg=%llu",
quic_enc_level_char_from_qel(qel, qc),
!!(pktns->flags & QUIC_FL_PKTNS_ACK_REQUIRED),
(unsigned long long)qc->path->cwnd,
(unsigned long long)qc->path->prep_in_flight,
(unsigned long long)qc->path->in_flight,
(unsigned long long)pktns->tx.in_flight, pktns->tx.pto_probe,
(unsigned long long)qc->tx.nb_pto_dgrams);
}
}
if (mask & QUIC_EV_CONN_ENCPKT) {
const struct enc_debug_info *edi = a2;
if (edi)
chunk_appendf(&trace_buf,
" payload=@%p payload_len=%llu"
" aad=@%p aad_len=%llu pn=%llu",
edi->payload, (unsigned long long)edi->payload_len,
edi->aad, (unsigned long long)edi->aad_len,
(unsigned long long)edi->pn);
}
if (mask & QUIC_EV_CONN_RMHP) {
const struct quic_rx_packet *pkt = a2;
if (pkt) {
const int *ret = a3;
chunk_appendf(&trace_buf, " pkt@%p", pkt);
if (ret && *ret)
chunk_appendf(&trace_buf, " pnl=%u pn=%llu",
pkt->pnl, (unsigned long long)pkt->pn);
}
}
if (mask & QUIC_EV_CONN_PRSAFRM) {
const struct quic_tx_frm *frm = a2;
const unsigned long *val1 = a3;
const unsigned long *val2 = a4;
if (frm)
chunk_tx_frm_appendf(&trace_buf, frm);
if (val1)
chunk_appendf(&trace_buf, " %lu", *val1);
if (val2)
chunk_appendf(&trace_buf, "..%lu", *val2);
}
if (mask & QUIC_EV_CONN_RTTUPDT) {
const unsigned int *rtt_sample = a2;
const unsigned int *ack_delay = a3;
const struct quic_loss *ql = a4;
if (rtt_sample)
chunk_appendf(&trace_buf, " rtt_sample=%ums", *rtt_sample);
if (ack_delay)
chunk_appendf(&trace_buf, " ack_delay=%ums", *ack_delay);
if (ql)
chunk_appendf(&trace_buf,
" srtt=%ums rttvar=%ums min_rtt=%ums",
ql->srtt >> 3, ql->rtt_var >> 2, ql->rtt_min);
}
if (mask & QUIC_EV_CONN_CC) {
const struct quic_cc_event *ev = a2;
const struct quic_cc *cc = a3;
if (a2)
quic_cc_event_trace(&trace_buf, ev);
if (a3)
quic_cc_state_trace(&trace_buf, cc);
}
if (mask & QUIC_EV_CONN_PKTLOSS) {
const struct quic_pktns *pktns = a2;
const struct list *lost_pkts = a3;
struct quic_conn *qc = conn->qc;
if (pktns) {
chunk_appendf(&trace_buf, " pktns=%s",
pktns == &qc->pktns[QUIC_TLS_PKTNS_INITIAL] ? "I" :
pktns == &qc->pktns[QUIC_TLS_PKTNS_01RTT] ? "01RTT": "H");
if (pktns->tx.loss_time)
chunk_appendf(&trace_buf, " loss_time=%dms",
TICKS_TO_MS(tick_remain(now_ms, pktns->tx.loss_time)));
}
if (lost_pkts && !LIST_ISEMPTY(lost_pkts)) {
struct quic_tx_packet *pkt;
chunk_appendf(&trace_buf, " lost_pkts:");
list_for_each_entry(pkt, lost_pkts, list)
chunk_appendf(&trace_buf, " %lu", (unsigned long)pkt->pn_node.key);
}
}
if (mask & (QUIC_EV_CONN_STIMER|QUIC_EV_CONN_PTIMER|QUIC_EV_CONN_SPTO)) {
struct quic_conn *qc = conn->qc;
const struct quic_pktns *pktns = a2;
const int *duration = a3;
const uint64_t *ifae_pkts = a4;
if (ifae_pkts)
chunk_appendf(&trace_buf, " ifae_pkts=%llu",
(unsigned long long)*ifae_pkts);
if (pktns) {
chunk_appendf(&trace_buf, " pktns=%s pp=%d",
pktns == &qc->pktns[QUIC_TLS_PKTNS_INITIAL] ? "I" :
pktns == &qc->pktns[QUIC_TLS_PKTNS_01RTT] ? "01RTT": "H",
pktns->tx.pto_probe);
if (mask & QUIC_EV_CONN_STIMER) {
if (pktns->tx.loss_time)
chunk_appendf(&trace_buf, " loss_time=%dms",
TICKS_TO_MS(pktns->tx.loss_time - now_ms));
}
if (mask & QUIC_EV_CONN_SPTO) {
if (pktns->tx.time_of_last_eliciting)
chunk_appendf(&trace_buf, " tole=%dms",
TICKS_TO_MS(pktns->tx.time_of_last_eliciting - now_ms));
if (duration)
chunk_appendf(&trace_buf, " dur=%dms", TICKS_TO_MS(*duration));
}
}
if (!(mask & QUIC_EV_CONN_SPTO) && qc->timer_task) {
chunk_appendf(&trace_buf,
" expire=%dms", TICKS_TO_MS(qc->timer - now_ms));
}
}
if (mask & QUIC_EV_CONN_SPPKTS) {
const struct quic_tx_packet *pkt = a2;
chunk_appendf(&trace_buf, " cwnd=%llu ppif=%llu pif=%llu",
(unsigned long long)qc->path->cwnd,
(unsigned long long)qc->path->prep_in_flight,
(unsigned long long)qc->path->in_flight);
if (pkt) {
chunk_appendf(&trace_buf, " pn=%lu(%s) iflen=%llu cdlen=%llu",
(unsigned long)pkt->pn_node.key,
pkt->pktns == &qc->pktns[QUIC_TLS_PKTNS_INITIAL] ? "I" :
pkt->pktns == &qc->pktns[QUIC_TLS_PKTNS_01RTT] ? "01RTT": "H",
(unsigned long long)pkt->in_flight_len,
(unsigned long long)pkt->cdata_len);
}
}
if (mask & QUIC_EV_CONN_SSLALERT) {
const uint8_t *alert = a2;
const enum ssl_encryption_level_t *level = a3;
if (alert)
chunk_appendf(&trace_buf, " alert=0x%02x", *alert);
if (level)
chunk_appendf(&trace_buf, " el=%c",
quic_enc_level_char(ssl_to_quic_enc_level(*level)));
}
if (mask & QUIC_EV_CONN_BCFRMS) {
const size_t *sz1 = a2;
const size_t *sz2 = a3;
const size_t *sz3 = a4;
if (sz1)
chunk_appendf(&trace_buf, " %llu", (unsigned long long)*sz1);
if (sz2)
chunk_appendf(&trace_buf, " %llu", (unsigned long long)*sz2);
if (sz3)
chunk_appendf(&trace_buf, " %llu", (unsigned long long)*sz3);
}
if (mask & QUIC_EV_CONN_PSTRM) {
const struct quic_frame *frm = a2;
const struct quic_stream *s = &frm->stream;
chunk_appendf(&trace_buf, " uni=%d fin=%d id=%llu off=%llu len=%llu",
!!(s->id & QUIC_STREAM_FRAME_ID_DIR_BIT),
!!(frm->type & QUIC_STREAM_FRAME_TYPE_FIN_BIT),
(unsigned long long)s->id,
(unsigned long long)s->offset,
(unsigned long long)s->len);
}
}
if (mask & QUIC_EV_CONN_LPKT) {
const struct quic_rx_packet *pkt = a2;
if (conn)
chunk_appendf(&trace_buf, " xprt_ctx@%p", conn->xprt_ctx);
if (pkt)
chunk_appendf(&trace_buf, " type=0x%02x %s",
pkt->type, qc_pkt_long(pkt) ? "long" : "short");
}
}
/* Returns 1 if the peer has validated <qc> QUIC connection address, 0 if not. */
static inline int quic_peer_validated_addr(struct quic_conn_ctx *ctx)
{
struct quic_conn *qc;
qc = ctx->conn->qc;
if (objt_server(qc->conn->target))
return 1;
if ((qc->els[QUIC_TLS_ENC_LEVEL_HANDSHAKE].pktns->flags & QUIC_FL_PKTNS_ACK_RECEIVED) ||
(qc->els[QUIC_TLS_ENC_LEVEL_APP].pktns->flags & QUIC_FL_PKTNS_ACK_RECEIVED) ||
(ctx->state & QUIC_HS_ST_COMPLETE))
return 1;
return 0;
}
/* Set the timer attached to the QUIC connection with <ctx> as I/O handler and used for
* both loss detection and PTO and schedule the task assiated to this timer if needed.
*/
static inline void qc_set_timer(struct quic_conn_ctx *ctx)
{
struct quic_conn *qc;
struct quic_pktns *pktns;
unsigned int pto;
TRACE_ENTER(QUIC_EV_CONN_STIMER, ctx->conn,
NULL, NULL, &ctx->conn->qc->path->ifae_pkts);
qc = ctx->conn->qc;
pktns = quic_loss_pktns(qc);
if (tick_isset(pktns->tx.loss_time)) {
qc->timer = pktns->tx.loss_time;
goto out;
}
/* XXX TODO: anti-amplification: the timer must be
* cancelled for a server which reached the anti-amplification limit.
*/
if (!qc->path->ifae_pkts && quic_peer_validated_addr(ctx)) {
TRACE_PROTO("timer cancellation", QUIC_EV_CONN_STIMER, ctx->conn);
/* Timer cancellation. */
qc->timer = TICK_ETERNITY;
goto out;
}
pktns = quic_pto_pktns(qc, ctx->state & QUIC_HS_ST_COMPLETE, &pto);
if (tick_isset(pto))
qc->timer = pto;
out:
task_schedule(qc->timer_task, qc->timer);
TRACE_LEAVE(QUIC_EV_CONN_STIMER, ctx->conn, pktns);
}
#ifndef OPENSSL_IS_BORINGSSL
int ha_quic_set_encryption_secrets(SSL *ssl, enum ssl_encryption_level_t level,
const uint8_t *read_secret,
const uint8_t *write_secret, size_t secret_len)
{
struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
struct quic_tls_ctx *tls_ctx =
&conn->qc->els[ssl_to_quic_enc_level(level)].tls_ctx;
const SSL_CIPHER *cipher = SSL_get_current_cipher(ssl);
TRACE_ENTER(QUIC_EV_CONN_RWSEC, conn);
tls_ctx->rx.aead = tls_ctx->tx.aead = tls_aead(cipher);
tls_ctx->rx.md = tls_ctx->tx.md = tls_md(cipher);
tls_ctx->rx.hp = tls_ctx->tx.hp = tls_hp(cipher);
if (!quic_tls_derive_keys(tls_ctx->rx.aead, tls_ctx->rx.hp, tls_ctx->rx.md,
tls_ctx->rx.key, sizeof tls_ctx->rx.key,
tls_ctx->rx.iv, sizeof tls_ctx->rx.iv,
tls_ctx->rx.hp_key, sizeof tls_ctx->rx.hp_key,
read_secret, secret_len)) {
TRACE_DEVEL("RX key derivation failed", QUIC_EV_CONN_RWSEC, conn);
return 0;
}
tls_ctx->rx.flags |= QUIC_FL_TLS_SECRETS_SET;
if (!quic_tls_derive_keys(tls_ctx->tx.aead, tls_ctx->tx.hp, tls_ctx->tx.md,
tls_ctx->tx.key, sizeof tls_ctx->tx.key,
tls_ctx->tx.iv, sizeof tls_ctx->tx.iv,
tls_ctx->tx.hp_key, sizeof tls_ctx->tx.hp_key,
write_secret, secret_len)) {
TRACE_DEVEL("TX key derivation failed", QUIC_EV_CONN_RWSEC, conn);
return 0;
}
tls_ctx->tx.flags |= QUIC_FL_TLS_SECRETS_SET;
if (objt_server(conn->target) && level == ssl_encryption_application) {
const unsigned char *buf;
size_t buflen;
SSL_get_peer_quic_transport_params(ssl, &buf, &buflen);
if (!buflen)
return 0;
if (!quic_transport_params_store(conn->qc, 1, buf, buf + buflen))
return 0;
}
TRACE_LEAVE(QUIC_EV_CONN_RWSEC, conn, &level);
return 1;
}
#else
/* ->set_read_secret callback to derive the RX secrets at <level> encryption
* level.
* Returns 1 if succeeded, 0 if not.
*/
int ha_set_rsec(SSL *ssl, enum ssl_encryption_level_t level,
const SSL_CIPHER *cipher,
const uint8_t *secret, size_t secret_len)
{
struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
struct quic_tls_ctx *tls_ctx =
&conn->qc->els[ssl_to_quic_enc_level(level)].tls_ctx;
TRACE_ENTER(QUIC_EV_CONN_RSEC, conn);
tls_ctx->rx.aead = tls_aead(cipher);
tls_ctx->rx.md = tls_md(cipher);
tls_ctx->rx.hp = tls_hp(cipher);
if (!quic_tls_derive_keys(tls_ctx->rx.aead, tls_ctx->rx.hp, tls_ctx->rx.md,
tls_ctx->rx.key, sizeof tls_ctx->rx.key,
tls_ctx->rx.iv, sizeof tls_ctx->rx.iv,
tls_ctx->rx.hp_key, sizeof tls_ctx->rx.hp_key,
secret, secret_len)) {
TRACE_DEVEL("RX key derivation failed", QUIC_EV_CONN_RSEC, conn);
goto err;
}
if (objt_server(conn->target) && level == ssl_encryption_application) {
const unsigned char *buf;
size_t buflen;
SSL_get_peer_quic_transport_params(ssl, &buf, &buflen);
if (!buflen)
goto err;
if (!quic_transport_params_store(conn->qc, 1, buf, buf + buflen))
goto err;
}
tls_ctx->rx.flags |= QUIC_FL_TLS_SECRETS_SET;
TRACE_LEAVE(QUIC_EV_CONN_RSEC, conn, &level, secret, &secret_len);
return 1;
err:
TRACE_DEVEL("leaving in error", QUIC_EV_CONN_RSEC, conn);
return 0;
}
/* ->set_write_secret callback to derive the TX secrets at <level>
* encryption level.
* Returns 1 if succeeded, 0 if not.
*/
int ha_set_wsec(SSL *ssl, enum ssl_encryption_level_t level,
const SSL_CIPHER *cipher,
const uint8_t *secret, size_t secret_len)
{
struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
struct quic_tls_ctx *tls_ctx =
&conn->qc->els[ssl_to_quic_enc_level(level)].tls_ctx;
TRACE_ENTER(QUIC_EV_CONN_WSEC, conn);
tls_ctx->tx.aead = tls_aead(cipher);
tls_ctx->tx.md = tls_md(cipher);
tls_ctx->tx.hp = tls_hp(cipher);
if (!quic_tls_derive_keys(tls_ctx->tx.aead, tls_ctx->tx.hp, tls_ctx->tx.md,
tls_ctx->tx.key, sizeof tls_ctx->tx.key,
tls_ctx->tx.iv, sizeof tls_ctx->tx.iv,
tls_ctx->tx.hp_key, sizeof tls_ctx->tx.hp_key,
secret, secret_len)) {
TRACE_DEVEL("TX key derivation failed", QUIC_EV_CONN_WSEC, conn);
goto err;
}
tls_ctx->tx.flags |= QUIC_FL_TLS_SECRETS_SET;
TRACE_LEAVE(QUIC_EV_CONN_WSEC, conn, &level, secret, &secret_len);
return 1;
err:
TRACE_DEVEL("leaving in error", QUIC_EV_CONN_WSEC, conn);
return 0;
}
#endif
/* This function copies the CRYPTO data provided by the TLS stack found at <data>
* with <len> as size in CRYPTO buffers dedicated to store the information about
* outgoing CRYPTO frames so that to be able to replay the CRYPTO data streams.
* It fails only if it could not managed to allocate enough CRYPTO buffers to
* store all the data.
* Note that CRYPTO data may exist at any encryption level except at 0-RTT.
*/
static int quic_crypto_data_cpy(struct quic_enc_level *qel,
const unsigned char *data, size_t len)
{
struct quic_crypto_buf **qcb;
/* The remaining byte to store in CRYPTO buffers. */
size_t cf_offset, cf_len, *nb_buf;
unsigned char *pos;
nb_buf = &qel->tx.crypto.nb_buf;
qcb = &qel->tx.crypto.bufs[*nb_buf - 1];
cf_offset = (*nb_buf - 1) * QUIC_CRYPTO_BUF_SZ + (*qcb)->sz;
cf_len = len;
while (len) {
size_t to_copy, room;
pos = (*qcb)->data + (*qcb)->sz;
room = QUIC_CRYPTO_BUF_SZ - (*qcb)->sz;
to_copy = len > room ? room : len;
if (to_copy) {
memcpy(pos, data, to_copy);
/* Increment the total size of this CRYPTO buffers by <to_copy>. */
qel->tx.crypto.sz += to_copy;
(*qcb)->sz += to_copy;
pos += to_copy;
len -= to_copy;
data += to_copy;
}
else {
struct quic_crypto_buf **tmp;
tmp = realloc(qel->tx.crypto.bufs,
(*nb_buf + 1) * sizeof *qel->tx.crypto.bufs);
if (tmp) {
qel->tx.crypto.bufs = tmp;
qcb = &qel->tx.crypto.bufs[*nb_buf];
*qcb = pool_alloc(pool_head_quic_crypto_buf);
if (!*qcb)
return 0;
(*qcb)->sz = 0;
++*nb_buf;
}
else {
break;
}
}
}
/* Allocate a TX CRYPTO frame only if all the CRYPTO data
* have been buffered.
*/
if (!len) {
struct quic_tx_frm *frm;
frm = pool_alloc(pool_head_quic_tx_frm);
if (!frm)
return 0;
frm->type = QUIC_FT_CRYPTO;
frm->crypto.offset = cf_offset;
frm->crypto.len = cf_len;
LIST_APPEND(&qel->pktns->tx.frms, &frm->list);
}
return len == 0;
}
/* ->add_handshake_data QUIC TLS callback used by the QUIC TLS stack when it
* wants to provide the QUIC layer with CRYPTO data.
* Returns 1 if succeeded, 0 if not.
*/
int ha_quic_add_handshake_data(SSL *ssl, enum ssl_encryption_level_t level,
const uint8_t *data, size_t len)
{
struct connection *conn;
enum quic_tls_enc_level tel;
struct quic_enc_level *qel;
conn = SSL_get_ex_data(ssl, ssl_app_data_index);
TRACE_ENTER(QUIC_EV_CONN_ADDDATA, conn);
tel = ssl_to_quic_enc_level(level);
qel = &conn->qc->els[tel];
if (tel == -1) {
TRACE_PROTO("Wrong encryption level", QUIC_EV_CONN_ADDDATA, conn);
goto err;
}
if (!quic_crypto_data_cpy(qel, data, len)) {
TRACE_PROTO("Could not bufferize", QUIC_EV_CONN_ADDDATA, conn);
goto err;
}
TRACE_PROTO("CRYPTO data buffered", QUIC_EV_CONN_ADDDATA,
conn, &level, &len);
TRACE_LEAVE(QUIC_EV_CONN_ADDDATA, conn);
return 1;
err:
TRACE_DEVEL("leaving in error", QUIC_EV_CONN_ADDDATA, conn);
return 0;
}
int ha_quic_flush_flight(SSL *ssl)
{
struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
TRACE_ENTER(QUIC_EV_CONN_FFLIGHT, conn);
TRACE_LEAVE(QUIC_EV_CONN_FFLIGHT, conn);
return 1;
}
int ha_quic_send_alert(SSL *ssl, enum ssl_encryption_level_t level, uint8_t alert)
{
struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
TRACE_DEVEL("SSL alert", QUIC_EV_CONN_SSLALERT, conn, &alert, &level);
return 1;
}
/* QUIC TLS methods */
static SSL_QUIC_METHOD ha_quic_method = {
#ifdef OPENSSL_IS_BORINGSSL
.set_read_secret = ha_set_rsec,
.set_write_secret = ha_set_wsec,
#else
.set_encryption_secrets = ha_quic_set_encryption_secrets,
#endif
.add_handshake_data = ha_quic_add_handshake_data,
.flush_flight = ha_quic_flush_flight,
.send_alert = ha_quic_send_alert,
};
/* Initialize the TLS context of a listener with <bind_conf> as configuration.
* Returns an error count.
*/
int ssl_quic_initial_ctx(struct bind_conf *bind_conf)
{
struct proxy *curproxy = bind_conf->frontend;
struct ssl_bind_conf __maybe_unused *ssl_conf_cur;
int cfgerr = 0;
#if 0
/* XXX Did not manage to use this. */
const char *ciphers =
"TLS_AES_128_GCM_SHA256:"
"TLS_AES_256_GCM_SHA384:"
"TLS_CHACHA20_POLY1305_SHA256:"
"TLS_AES_128_CCM_SHA256";
#endif
const char *groups = "P-256:X25519:P-384:P-521";
long options =
(SSL_OP_ALL & ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) |
SSL_OP_SINGLE_ECDH_USE |
SSL_OP_CIPHER_SERVER_PREFERENCE;
SSL_CTX *ctx;
ctx = SSL_CTX_new(TLS_server_method());
bind_conf->initial_ctx = ctx;
SSL_CTX_set_options(ctx, options);
#if 0
if (SSL_CTX_set_cipher_list(ctx, ciphers) != 1) {
ha_alert("Proxy '%s': unable to set TLS 1.3 cipher list to '%s' "
"for bind '%s' at [%s:%d].\n",
curproxy->id, ciphers,
bind_conf->arg, bind_conf->file, bind_conf->line);
cfgerr++;
}
#endif
if (SSL_CTX_set1_curves_list(ctx, groups) != 1) {
ha_alert("Proxy '%s': unable to set TLS 1.3 curves list to '%s' "
"for bind '%s' at [%s:%d].\n",
curproxy->id, groups,
bind_conf->arg, bind_conf->file, bind_conf->line);
cfgerr++;
}
SSL_CTX_set_mode(ctx, SSL_MODE_RELEASE_BUFFERS);
SSL_CTX_set_min_proto_version(ctx, TLS1_3_VERSION);
SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
SSL_CTX_set_default_verify_paths(ctx);
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
#ifdef OPENSSL_IS_BORINGSSL
SSL_CTX_set_select_certificate_cb(ctx, ssl_sock_switchctx_cbk);
SSL_CTX_set_tlsext_servername_callback(ctx, ssl_sock_switchctx_err_cbk);
#elif (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L)
if (bind_conf->ssl_conf.early_data) {
SSL_CTX_set_options(ctx, SSL_OP_NO_ANTI_REPLAY);
SSL_CTX_set_max_early_data(ctx, global.tune.bufsize - global.tune.maxrewrite);
}
SSL_CTX_set_client_hello_cb(ctx, ssl_sock_switchctx_cbk, NULL);
SSL_CTX_set_tlsext_servername_callback(ctx, ssl_sock_switchctx_err_cbk);
#else
SSL_CTX_set_tlsext_servername_callback(ctx, ssl_sock_switchctx_cbk);
#endif
SSL_CTX_set_tlsext_servername_arg(ctx, bind_conf);
#endif
SSL_CTX_set_quic_method(ctx, &ha_quic_method);