mirror of
https://gitea.invidious.io/iv-org/litespeed-quic.git
synced 2024-08-15 00:53:43 +00:00
- [BUGFIX] Heed es_rw_once for pushed HTTP/3 streams. - [BUGFIX] IETF client: set correct flags on bidirectional streams. - [BUGFIX] Generate Cancel Stream QPACK instructions for abandoned streams. - [BUGFIX] Do not call header callbacks after stream is closed. - Use ls-qpack 2.1.1
1311 lines
41 KiB
C
1311 lines
41 KiB
C
/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */
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/*
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* test_h3_framing.c -- test generation of H3 frames
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <limits.h>
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#ifndef WIN32
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#include <unistd.h>
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#else
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#include <getopt.h>
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#endif
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#include "lsquic.h"
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#include "lsquic_packet_common.h"
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#include "lsquic_packet_ietf.h"
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#include "lsquic_alarmset.h"
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#include "lsquic_packet_in.h"
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#include "lsquic_conn_flow.h"
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#include "lsquic_rtt.h"
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#include "lsquic_sfcw.h"
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#include "lsquic_varint.h"
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#include "lsquic_hq.h"
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#include "lsquic_hash.h"
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#include "lsquic_stream.h"
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#include "lsquic_types.h"
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#include "lsquic_malo.h"
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#include "lsquic_mm.h"
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#include "lsquic_conn_public.h"
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#include "lsquic_logger.h"
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#include "lsquic_parse.h"
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#include "lsquic_conn.h"
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#include "lsquic_engine_public.h"
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#include "lsquic_cubic.h"
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#include "lsquic_pacer.h"
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#include "lsquic_senhist.h"
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#include "lsquic_bw_sampler.h"
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#include "lsquic_minmax.h"
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#include "lsquic_bbr.h"
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#include "lsquic_send_ctl.h"
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#include "lsquic_ver_neg.h"
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#include "lsquic_packet_out.h"
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#include "lsquic_enc_sess.h"
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#include "lsqpack.h"
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#include "lsxpack_header.h"
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#include "lsquic_frab_list.h"
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#include "lsquic_qenc_hdl.h"
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#include "lsquic_http1x_if.h"
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#include "lsquic_qdec_hdl.h"
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#include "lsquic_varint.h"
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#include "lsquic_hq.h"
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#include "lsquic_data_in_if.h"
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static const struct parse_funcs *g_pf = select_pf_by_ver(LSQVER_ID25);
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struct test_ctl_settings
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{
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int tcs_schedule_stream_packets_immediately;
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int tcs_have_delayed_packets;
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unsigned tcs_can_send;
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enum buf_packet_type
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tcs_bp_type;
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enum packno_bits
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tcs_guess_packno_bits,
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tcs_calc_packno_bits;
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};
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static struct test_ctl_settings g_ctl_settings;
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static void
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init_buf (void *buf, size_t sz);
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/* Set values to default */
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static void
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init_test_ctl_settings (struct test_ctl_settings *settings)
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{
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settings->tcs_schedule_stream_packets_immediately = 1;
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settings->tcs_have_delayed_packets = 0;
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settings->tcs_can_send = UINT_MAX;
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settings->tcs_bp_type = BPT_HIGHEST_PRIO;
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settings->tcs_guess_packno_bits = PACKNO_BITS_1;
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settings->tcs_calc_packno_bits = PACKNO_BITS_1;
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}
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enum packno_bits
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lsquic_send_ctl_calc_packno_bits (struct lsquic_send_ctl *ctl)
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{
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return g_ctl_settings.tcs_calc_packno_bits;
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}
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int
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lsquic_send_ctl_schedule_stream_packets_immediately (struct lsquic_send_ctl *ctl)
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{
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return g_ctl_settings.tcs_schedule_stream_packets_immediately;
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}
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int
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lsquic_send_ctl_have_delayed_packets (const struct lsquic_send_ctl *ctl)
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{
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return g_ctl_settings.tcs_have_delayed_packets;
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}
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int
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lsquic_send_ctl_can_send (struct lsquic_send_ctl *ctl)
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{
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return ctl->sc_n_scheduled < g_ctl_settings.tcs_can_send;
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}
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enum packno_bits
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lsquic_send_ctl_guess_packno_bits (struct lsquic_send_ctl *ctl)
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{
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return g_ctl_settings.tcs_guess_packno_bits;
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}
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enum buf_packet_type
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lsquic_send_ctl_determine_bpt (struct lsquic_send_ctl *ctl,
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const struct lsquic_stream *stream)
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{
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return g_ctl_settings.tcs_bp_type;
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}
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/* This function is only here to avoid crash in the test: */
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void
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lsquic_engine_add_conn_to_tickable (struct lsquic_engine_public *enpub,
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lsquic_conn_t *conn)
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{
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}
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static unsigned n_closed;
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static enum stream_ctor_flags stream_ctor_flags =
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SCF_CALL_ON_NEW|SCF_DI_AUTOSWITCH;
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struct test_ctx {
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lsquic_stream_t *stream;
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};
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static lsquic_stream_ctx_t *
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on_new_stream (void *stream_if_ctx, lsquic_stream_t *stream)
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{
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struct test_ctx *test_ctx = stream_if_ctx;
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test_ctx->stream = stream;
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return NULL;
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}
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static void
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on_close (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
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{
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++n_closed;
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}
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const struct lsquic_stream_if stream_if = {
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.on_new_stream = on_new_stream,
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.on_close = on_close,
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};
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static size_t
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read_from_scheduled_packets (lsquic_send_ctl_t *send_ctl, lsquic_stream_id_t stream_id,
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unsigned char *const begin, size_t bufsz, uint64_t first_offset, int *p_fin,
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int fullcheck)
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{
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const struct parse_funcs *const pf_local = send_ctl->sc_conn_pub->lconn->cn_pf;
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unsigned char *p = begin;
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unsigned char *const end = p + bufsz;
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const struct stream_rec *srec;
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struct packet_out_srec_iter posi;
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struct lsquic_packet_out *packet_out;
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struct stream_frame frame;
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enum quic_frame_type expected_type;
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int len, fin = 0;
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expected_type = QUIC_FRAME_STREAM;
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TAILQ_FOREACH(packet_out, &send_ctl->sc_scheduled_packets, po_next)
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for (srec = lsquic_posi_first(&posi, packet_out); srec;
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srec = lsquic_posi_next(&posi))
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{
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if (fullcheck)
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{
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assert(srec->sr_frame_type == expected_type);
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if (0 && packet_out->po_packno != 1)
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{
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/* First packet may contain two stream frames, do not
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* check it.
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*/
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assert(!lsquic_posi_next(&posi));
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if (TAILQ_NEXT(packet_out, po_next))
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{
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assert(packet_out->po_data_sz == packet_out->po_n_alloc);
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assert(srec->sr_len == packet_out->po_data_sz);
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}
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}
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}
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if (srec->sr_frame_type == expected_type &&
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srec->sr_stream->id == stream_id)
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{
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assert(!fin);
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if (QUIC_FRAME_STREAM == expected_type)
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len = pf_local->pf_parse_stream_frame(packet_out->po_data + srec->sr_off,
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packet_out->po_data_sz - srec->sr_off, &frame);
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else
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len = pf_local->pf_parse_crypto_frame(packet_out->po_data + srec->sr_off,
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packet_out->po_data_sz - srec->sr_off, &frame);
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assert(len > 0);
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if (QUIC_FRAME_STREAM == expected_type)
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assert(frame.stream_id == srec->sr_stream->id);
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else
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assert(frame.stream_id == ~0ULL);
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/* Otherwise not enough to copy to: */
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assert(end - p >= frame.data_frame.df_size);
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/* Checks offset ordering: */
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assert(frame.data_frame.df_offset ==
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first_offset + (uintptr_t) (p - begin));
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if (frame.data_frame.df_fin)
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{
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assert(!fin);
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fin = 1;
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}
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memcpy(p, packet_out->po_data + srec->sr_off + len -
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frame.data_frame.df_size, frame.data_frame.df_size);
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p += frame.data_frame.df_size;
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}
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}
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if (p_fin)
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*p_fin = fin;
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return p + bufsz - end;
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}
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static struct test_ctx test_ctx;
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struct test_objs {
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struct lsquic_engine_public eng_pub;
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struct lsquic_conn lconn;
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struct lsquic_conn_public conn_pub;
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struct lsquic_send_ctl send_ctl;
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struct lsquic_alarmset alset;
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void *stream_if_ctx;
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struct ver_neg ver_neg;
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const struct lsquic_stream_if *
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stream_if;
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unsigned initial_stream_window;
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enum stream_ctor_flags ctor_flags;
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struct qpack_enc_hdl qeh;
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struct qpack_dec_hdl qdh;
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struct lsquic_hset_if hsi_if;
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};
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static int
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unit_test_doesnt_write_ack (struct lsquic_conn *lconn)
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{
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return 0;
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}
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static struct network_path network_path;
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static struct network_path *
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get_network_path (struct lsquic_conn *lconn, const struct sockaddr *sa)
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{
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return &network_path;
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}
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static const struct conn_iface our_conn_if =
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{
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.ci_can_write_ack = unit_test_doesnt_write_ack,
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.ci_get_path = get_network_path,
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};
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static void
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init_test_objs (struct test_objs *tobjs, unsigned initial_conn_window,
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unsigned initial_stream_window, unsigned short packet_sz)
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{
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int s;
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memset(tobjs, 0, sizeof(*tobjs));
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LSCONN_INITIALIZE(&tobjs->lconn);
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tobjs->lconn.cn_pf = g_pf;
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tobjs->lconn.cn_version = LSQVER_ID25;
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tobjs->lconn.cn_esf_c = &lsquic_enc_session_common_ietf_v1;
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network_path.np_pack_size = packet_sz;
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tobjs->lconn.cn_if = &our_conn_if;
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lsquic_mm_init(&tobjs->eng_pub.enp_mm);
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TAILQ_INIT(&tobjs->conn_pub.sending_streams);
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TAILQ_INIT(&tobjs->conn_pub.read_streams);
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TAILQ_INIT(&tobjs->conn_pub.write_streams);
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TAILQ_INIT(&tobjs->conn_pub.service_streams);
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lsquic_cfcw_init(&tobjs->conn_pub.cfcw, &tobjs->conn_pub,
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initial_conn_window);
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lsquic_conn_cap_init(&tobjs->conn_pub.conn_cap, initial_conn_window);
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lsquic_alarmset_init(&tobjs->alset, 0);
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tobjs->conn_pub.mm = &tobjs->eng_pub.enp_mm;
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tobjs->conn_pub.lconn = &tobjs->lconn;
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tobjs->conn_pub.enpub = &tobjs->eng_pub;
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tobjs->conn_pub.send_ctl = &tobjs->send_ctl;
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tobjs->conn_pub.packet_out_malo =
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lsquic_malo_create(sizeof(struct lsquic_packet_out));
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tobjs->conn_pub.path = &network_path;
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tobjs->initial_stream_window = initial_stream_window;
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tobjs->eng_pub.enp_settings.es_cc_algo = 1; /* Cubic */
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tobjs->eng_pub.enp_hsi_if = &tobjs->hsi_if;
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lsquic_send_ctl_init(&tobjs->send_ctl, &tobjs->alset, &tobjs->eng_pub,
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&tobjs->ver_neg, &tobjs->conn_pub, 0);
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tobjs->send_ctl.sc_cong_u.cubic.cu_cwnd = ~0ull;
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tobjs->stream_if = &stream_if;
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tobjs->stream_if_ctx = &test_ctx;
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tobjs->ctor_flags = stream_ctor_flags;
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if ((1 << tobjs->lconn.cn_version) & LSQUIC_IETF_VERSIONS)
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{
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lsquic_qeh_init(&tobjs->qeh, &tobjs->lconn);
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s = lsquic_qeh_settings(&tobjs->qeh, 0, 0, 0, 0);
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assert(0 == s);
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tobjs->conn_pub.u.ietf.qeh = &tobjs->qeh;
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lsquic_qdh_init(&tobjs->qdh, &tobjs->lconn, 0, &tobjs->eng_pub, 0, 0);
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tobjs->conn_pub.u.ietf.qdh = &tobjs->qdh;
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}
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}
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static void
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deinit_test_objs (struct test_objs *tobjs)
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{
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assert(!lsquic_malo_first(tobjs->eng_pub.enp_mm.malo.stream_frame));
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lsquic_send_ctl_cleanup(&tobjs->send_ctl);
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lsquic_malo_destroy(tobjs->conn_pub.packet_out_malo);
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lsquic_mm_cleanup(&tobjs->eng_pub.enp_mm);
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if ((1 << tobjs->lconn.cn_version) & LSQUIC_IETF_VERSIONS)
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lsquic_qeh_cleanup(&tobjs->qeh);
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}
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static struct lsquic_stream *
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new_stream (struct test_objs *tobjs, unsigned stream_id, uint64_t send_off)
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{
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return lsquic_stream_new(stream_id, &tobjs->conn_pub, tobjs->stream_if,
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tobjs->stream_if_ctx, tobjs->initial_stream_window, send_off,
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tobjs->ctor_flags);
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}
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struct packetization_test_stream_ctx
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{
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const unsigned char *buf;
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unsigned len, off, write_size;
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int flush_after_each_write;
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};
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static lsquic_stream_ctx_t *
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packetization_on_new_stream (void *stream_if_ctx, lsquic_stream_t *stream)
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{
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lsquic_stream_wantwrite(stream, 1);
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return stream_if_ctx;
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}
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static void
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packetization_on_close (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
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{
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}
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#define RANDOM_WRITE_SIZE ~0U
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static unsigned
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calc_n_to_write (unsigned write_size)
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{
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if (write_size == RANDOM_WRITE_SIZE)
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return rand() % 1000 + 1;
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else
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return write_size;
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}
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static void
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packetization_write_as_much_as_you_can (lsquic_stream_t *stream,
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lsquic_stream_ctx_t *ctx)
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{
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struct packetization_test_stream_ctx *const pack_ctx = (void *) ctx;
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unsigned n_to_write, n_sched;
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ssize_t n_written;
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size_t avail;
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int s;
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while (pack_ctx->off < pack_ctx->len)
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{
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n_to_write = calc_n_to_write(pack_ctx->write_size);
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n_sched = lsquic_send_ctl_n_scheduled(stream->conn_pub->send_ctl);
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if (n_to_write > pack_ctx->len - pack_ctx->off)
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n_to_write = pack_ctx->len - pack_ctx->off;
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n_written = lsquic_stream_write(stream, pack_ctx->buf + pack_ctx->off,
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n_to_write);
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if (n_written == 0)
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{
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if (n_to_write && SSHS_BEGIN == stream->sm_send_headers_state
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&& lsquic_send_ctl_can_send(stream->conn_pub->send_ctl))
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{
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avail = lsquic_stream_write_avail(stream);
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assert(avail == 0
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|| lsquic_send_ctl_n_scheduled(
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stream->conn_pub->send_ctl) > n_sched);
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}
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break;
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}
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pack_ctx->off += n_written;
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if (pack_ctx->flush_after_each_write)
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{
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s = lsquic_stream_flush(stream);
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assert(s == 0);
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}
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}
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s = lsquic_stream_flush(stream);
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assert(s == 0);
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lsquic_stream_wantwrite(stream, 0);
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}
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static void
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packetization_perform_one_write (lsquic_stream_t *stream,
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lsquic_stream_ctx_t *ctx)
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{
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struct packetization_test_stream_ctx *const pack_ctx = (void *) ctx;
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unsigned n_to_write, n_sched;
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ssize_t n_written;
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size_t avail;
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int s;
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n_to_write = calc_n_to_write(pack_ctx->write_size);
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if (n_to_write > pack_ctx->len - pack_ctx->off)
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n_to_write = pack_ctx->len - pack_ctx->off;
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n_sched = lsquic_send_ctl_n_scheduled(stream->conn_pub->send_ctl);
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n_written = lsquic_stream_write(stream, pack_ctx->buf + pack_ctx->off,
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n_to_write);
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assert(n_written >= 0);
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if (n_written == 0 && SSHS_BEGIN == stream->sm_send_headers_state
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&& n_to_write
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&& lsquic_send_ctl_can_send(stream->conn_pub->send_ctl))
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{
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avail = lsquic_stream_write_avail(stream);
|
|
assert(avail == 0
|
|
|| lsquic_send_ctl_n_scheduled(
|
|
stream->conn_pub->send_ctl) > n_sched);
|
|
}
|
|
pack_ctx->off += n_written;
|
|
if (pack_ctx->flush_after_each_write)
|
|
{
|
|
s = lsquic_stream_flush(stream);
|
|
assert(s == 0);
|
|
}
|
|
if (n_written == 0)
|
|
lsquic_stream_wantwrite(stream, 0);
|
|
}
|
|
|
|
|
|
static const struct lsquic_stream_if packetization_inside_once_stream_if = {
|
|
.on_new_stream = packetization_on_new_stream,
|
|
.on_close = packetization_on_close,
|
|
.on_write = packetization_write_as_much_as_you_can,
|
|
};
|
|
|
|
|
|
static const struct lsquic_stream_if packetization_inside_many_stream_if = {
|
|
.on_new_stream = packetization_on_new_stream,
|
|
.on_close = packetization_on_close,
|
|
.on_write = packetization_perform_one_write,
|
|
};
|
|
|
|
|
|
static void
|
|
test_hq_framing (int sched_immed, int dispatch_once, unsigned wsize,
|
|
int flush_after_each_write, size_t conn_limit,
|
|
unsigned n_packets, unsigned short packet_sz)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
size_t nw;
|
|
int fin, s;
|
|
unsigned char *buf_in, *buf_out;
|
|
const size_t buf_in_sz = 0x40000, buf_out_sz = 0x500000;
|
|
|
|
/* We'll write headers first after which stream will switch to using
|
|
* data-framing writer. This is simply so that we don't have to
|
|
* expose more stream things only for testing.
|
|
*/
|
|
struct lsxpack_header header;
|
|
lsxpack_header_set_ptr(&header, ":method", 7, "GET", 3);
|
|
struct lsquic_http_headers headers = { 1, &header, };
|
|
|
|
buf_in = malloc(buf_in_sz);
|
|
buf_out = malloc(buf_out_sz);
|
|
assert(buf_in && buf_out);
|
|
|
|
struct packetization_test_stream_ctx packet_stream_ctx =
|
|
{
|
|
.buf = buf_in,
|
|
.off = 0,
|
|
.len = buf_in_sz,
|
|
.write_size = wsize,
|
|
.flush_after_each_write = flush_after_each_write,
|
|
};
|
|
|
|
init_buf(buf_in, buf_in_sz);
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
g_ctl_settings.tcs_schedule_stream_packets_immediately = sched_immed;
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, conn_limit ? conn_limit : buf_out_sz, buf_out_sz, packet_sz);
|
|
tobjs.stream_if_ctx = &packet_stream_ctx;
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
if (sched_immed)
|
|
{
|
|
g_ctl_settings.tcs_can_send = n_packets;
|
|
if (dispatch_once)
|
|
{
|
|
tobjs.stream_if = &packetization_inside_once_stream_if;
|
|
tobjs.ctor_flags |= SCF_DISP_RW_ONCE;
|
|
}
|
|
else
|
|
tobjs.stream_if = &packetization_inside_many_stream_if;
|
|
}
|
|
else
|
|
{
|
|
lsquic_send_ctl_set_max_bpq_count(n_packets);
|
|
g_ctl_settings.tcs_can_send = INT_MAX;
|
|
/* Need this for on_new_stream() callback not to mess with
|
|
* the context, otherwise this is not used.
|
|
*/
|
|
tobjs.stream_if = &packetization_inside_many_stream_if;
|
|
}
|
|
|
|
stream = new_stream(&tobjs, 0, buf_out_sz);
|
|
|
|
s = lsquic_stream_send_headers(stream, &headers, 0);
|
|
assert(0 == s);
|
|
|
|
if (sched_immed)
|
|
{
|
|
lsquic_stream_dispatch_write_events(stream);
|
|
lsquic_stream_flush(stream);
|
|
}
|
|
else
|
|
{
|
|
packetization_write_as_much_as_you_can(stream,
|
|
(void *) &packet_stream_ctx);
|
|
g_ctl_settings.tcs_schedule_stream_packets_immediately = 1;
|
|
lsquic_send_ctl_schedule_buffered(&tobjs.send_ctl, BPT_HIGHEST_PRIO);
|
|
g_ctl_settings.tcs_schedule_stream_packets_immediately = 0;
|
|
}
|
|
lsquic_send_ctl_set_max_bpq_count(10);
|
|
|
|
/* Verify written data: */
|
|
nw = read_from_scheduled_packets(&tobjs.send_ctl, 0, buf_out, buf_out_sz,
|
|
0, &fin, 1);
|
|
if (!conn_limit)
|
|
assert(nw > buf_in_sz);
|
|
{ /* Remove framing and verify contents */
|
|
const unsigned char *src;
|
|
unsigned char *dst;
|
|
uint64_t sz;
|
|
unsigned frame_type;
|
|
int s;
|
|
|
|
src = buf_out;
|
|
dst = buf_out;
|
|
while (src < buf_out + nw)
|
|
{
|
|
frame_type = *src++;
|
|
s = vint_read(src, buf_out + buf_out_sz, &sz);
|
|
assert(s > 0);
|
|
/* In some rare circumstances it is possible to produce zero-length
|
|
* DATA frames:
|
|
*
|
|
* assert(sz > 0);
|
|
*/
|
|
assert(sz < (1 << 14));
|
|
src += s;
|
|
if (src == buf_out + s + 1)
|
|
{
|
|
/* Ignore headers */
|
|
assert(frame_type == HQFT_HEADERS);
|
|
src += sz;
|
|
}
|
|
else
|
|
{
|
|
assert(frame_type == HQFT_DATA);
|
|
if (src + sz > buf_out + nw) /* Chopped DATA frame (last) */
|
|
sz = buf_out + nw - src;
|
|
memmove(dst, src, sz);
|
|
dst += sz;
|
|
src += sz;
|
|
}
|
|
}
|
|
if (!conn_limit)
|
|
assert(buf_in_sz == (uintptr_t) dst - (uintptr_t) buf_out);
|
|
assert(0 == memcmp(buf_in, buf_out, (uintptr_t) dst - (uintptr_t) buf_out));
|
|
}
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
free(buf_in);
|
|
free(buf_out);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
static void
|
|
main_test_hq_framing (void)
|
|
{
|
|
const unsigned wsizes[] = { 1, 2, 3, 7, 10, 50, 100, 201, 211, 1000, 2003, 20000, };
|
|
const size_t conn_limits[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
|
|
14, 15, 16, 17, 18, 19, 20, 21, 30, 31, 32, 33, 63, 64, 128, 200, 255,
|
|
256, 512, 1024, 2045, 2048, 2049, 3000, 4091, 4096, 4097, 5000, 8192,
|
|
16 * 1024 - 1, 16 * 1024, 32 * 1024, 33 * 1024, };
|
|
const unsigned n_packets[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 100, UINT_MAX, };
|
|
const unsigned short packet_sz[] = { 1252, 1370, 0x1000, 0xFF00, };
|
|
unsigned i, j, k, l;
|
|
int sched_immed, dispatch_once, flush_after_each_write;
|
|
|
|
for (sched_immed = 0; sched_immed <= 1; ++sched_immed)
|
|
for (dispatch_once = 0; dispatch_once <= 1; ++dispatch_once)
|
|
for (i = 0; i < sizeof(wsizes) / sizeof(wsizes[i]); ++i)
|
|
for (j = 0; j < sizeof(conn_limits) / sizeof(conn_limits[j]); ++j)
|
|
for (flush_after_each_write = 0; flush_after_each_write < 2; ++flush_after_each_write)
|
|
for (k = 0; k < sizeof(n_packets) / sizeof(n_packets[0]); ++k)
|
|
for (l = 0; l < sizeof(packet_sz) / sizeof(packet_sz[0]); ++l)
|
|
test_hq_framing(sched_immed, dispatch_once, wsizes[i], flush_after_each_write, conn_limits[j], n_packets[k], packet_sz[l]);
|
|
}
|
|
|
|
|
|
/* Instead of the not-very-random testing done in main_test_hq_framing(),
|
|
* the fuzz-guided testing initializes parameters based on the fuzz input
|
|
* file. This allows afl-fuzz explore the code paths.
|
|
*/
|
|
void
|
|
fuzz_guided_testing (const char *input)
|
|
{
|
|
/* Range */ /* Bytes from file */
|
|
unsigned short packet_sz; /* [200, 0x3FFF] */ /* 2 */
|
|
unsigned wsize; /* [1, 20000] */ /* 2 */
|
|
unsigned n_packets; /* [1, 255] and UINT_MAX */ /* 1 */
|
|
size_t conn_limit; /* [1, 33K] */ /* 2 */
|
|
int sched_immed; /* 0 or 1 */ /* 1 */
|
|
int dispatch_once; /* 0 or 1 */ /* 0 (same as above) */
|
|
int flush_after_each_write; /* 0 or 1 */ /* 0 (same as above) */
|
|
/* TOTAL: 8 bytes */
|
|
|
|
FILE *f;
|
|
size_t nread;
|
|
uint16_t tmp;
|
|
unsigned char buf[9];
|
|
|
|
f = fopen(input, "rb");
|
|
if (!f)
|
|
{
|
|
assert(0);
|
|
return;
|
|
}
|
|
|
|
nread = fread(buf, 1, sizeof(buf), f);
|
|
if (nread != 8)
|
|
goto cleanup;
|
|
|
|
memcpy(&tmp, &buf[0], 2);
|
|
if (tmp < 200)
|
|
tmp = 200;
|
|
else if (tmp > IQUIC_MAX_OUT_PACKET_SZ)
|
|
tmp = IQUIC_MAX_OUT_PACKET_SZ;
|
|
packet_sz = tmp;
|
|
|
|
memcpy(&tmp, &buf[2], 2);
|
|
if (tmp < 1)
|
|
tmp = 1;
|
|
else if (tmp > 20000)
|
|
tmp = 20000;
|
|
wsize = tmp;
|
|
|
|
if (buf[4])
|
|
n_packets = buf[4];
|
|
else
|
|
n_packets = UINT_MAX;
|
|
|
|
memcpy(&tmp, &buf[5], 2);
|
|
if (tmp < 1)
|
|
tmp = 1;
|
|
else if (tmp > 33 * 1024)
|
|
tmp = 33 * 1024;
|
|
conn_limit = tmp;
|
|
|
|
sched_immed = !!(buf[7] & 1);
|
|
dispatch_once = !!(buf[7] & 2);
|
|
flush_after_each_write = !!(buf[7] & 4);
|
|
|
|
test_hq_framing(sched_immed, dispatch_once, wsize,
|
|
flush_after_each_write, conn_limit, n_packets, packet_sz);
|
|
|
|
cleanup:
|
|
(void) fclose(f);
|
|
}
|
|
|
|
|
|
static void
|
|
test_frame_header_split (unsigned n_packets, unsigned extra_sz,
|
|
int add_one_more)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
size_t nw;
|
|
int fin, s;
|
|
unsigned char *buf_in, *buf_out;
|
|
const unsigned wsize = 70;
|
|
const size_t buf_in_sz = wsize, buf_out_sz = 0x500000;
|
|
|
|
struct lsxpack_header header;
|
|
lsxpack_header_set_ptr(&header, ":method", 7, "GET", 3);
|
|
struct lsquic_http_headers headers = { 1, &header, };
|
|
|
|
buf_in = malloc(buf_in_sz);
|
|
buf_out = malloc(buf_out_sz);
|
|
assert(buf_in && buf_out);
|
|
|
|
struct packetization_test_stream_ctx packet_stream_ctx =
|
|
{
|
|
.buf = buf_in,
|
|
.off = 0,
|
|
.len = buf_in_sz,
|
|
.write_size = wsize,
|
|
.flush_after_each_write = 0,
|
|
};
|
|
|
|
init_buf(buf_in, buf_in_sz);
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
g_ctl_settings.tcs_schedule_stream_packets_immediately = 1;
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, 0x1000, buf_out_sz, 1252);
|
|
tobjs.stream_if_ctx = &packet_stream_ctx;
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
|
|
g_ctl_settings.tcs_can_send = n_packets;
|
|
tobjs.stream_if = &packetization_inside_once_stream_if;
|
|
tobjs.ctor_flags |= SCF_DISP_RW_ONCE;
|
|
|
|
struct lsquic_packet_out *const packet_out
|
|
= lsquic_send_ctl_new_packet_out(&tobjs.send_ctl, 0, PNS_APP, &network_path);
|
|
assert(packet_out);
|
|
const size_t pad_size = packet_out->po_n_alloc
|
|
- 2 /* STREAM header */
|
|
- 5 /* 3-byte HEADERS frame */
|
|
- extra_sz;
|
|
packet_out->po_data_sz = pad_size;
|
|
lsquic_send_ctl_scheduled_one(&tobjs.send_ctl, packet_out);
|
|
|
|
stream = new_stream(&tobjs, 0, buf_out_sz);
|
|
|
|
s = lsquic_stream_send_headers(stream, &headers, 0);
|
|
assert(0 == s);
|
|
|
|
const ssize_t w = lsquic_stream_write(stream, buf_in, buf_in_sz);
|
|
assert(w >= 0 && (size_t) w == buf_in_sz);
|
|
lsquic_stream_flush(stream);
|
|
|
|
if (add_one_more)
|
|
{
|
|
++g_ctl_settings.tcs_can_send;
|
|
lsquic_stream_flush(stream);
|
|
}
|
|
|
|
/* Verify written data: */
|
|
nw = read_from_scheduled_packets(&tobjs.send_ctl, 0, buf_out, buf_out_sz,
|
|
0, &fin, 1);
|
|
{ /* Remove framing and verify contents */
|
|
const unsigned char *src;
|
|
unsigned char *dst;
|
|
uint64_t sz;
|
|
unsigned frame_type;
|
|
int s;
|
|
|
|
src = buf_out;
|
|
dst = buf_out;
|
|
while (src < buf_out + nw)
|
|
{
|
|
frame_type = *src++;
|
|
s = vint_read(src, buf_out + buf_out_sz, &sz);
|
|
assert(s > 0);
|
|
assert(sz > 0);
|
|
assert(sz < (1 << 14));
|
|
src += s;
|
|
if (src == buf_out + s + 1)
|
|
{
|
|
/* Ignore headers */
|
|
assert(frame_type == HQFT_HEADERS);
|
|
src += sz;
|
|
}
|
|
else
|
|
{
|
|
assert(frame_type == HQFT_DATA);
|
|
if (src + sz > buf_out + nw) /* Chopped DATA frame (last) */
|
|
sz = buf_out + nw - src;
|
|
memmove(dst, src, sz);
|
|
dst += sz;
|
|
src += sz;
|
|
}
|
|
}
|
|
assert(0 == memcmp(buf_in, buf_out, (uintptr_t) dst - (uintptr_t) buf_out));
|
|
}
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
free(buf_in);
|
|
free(buf_out);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
static void
|
|
test_zero_size_frame (void)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
ssize_t w;
|
|
size_t nw;
|
|
int fin, s;
|
|
unsigned char *buf_in, *buf_out;
|
|
const unsigned wsize = 7000;
|
|
const size_t buf_in_sz = wsize, buf_out_sz = 0x500000;
|
|
|
|
struct lsxpack_header header;
|
|
lsxpack_header_set_ptr(&header, ":method", 7, "GET", 3);
|
|
struct lsquic_http_headers headers = { 1, &header, };
|
|
|
|
buf_in = malloc(buf_in_sz);
|
|
buf_out = malloc(buf_out_sz);
|
|
assert(buf_in && buf_out);
|
|
|
|
struct packetization_test_stream_ctx packet_stream_ctx =
|
|
{
|
|
.buf = buf_in,
|
|
.off = 0,
|
|
.len = buf_in_sz,
|
|
.write_size = wsize,
|
|
.flush_after_each_write = 0,
|
|
};
|
|
|
|
init_buf(buf_in, buf_in_sz);
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
g_ctl_settings.tcs_schedule_stream_packets_immediately = 1;
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, 0x1000, buf_out_sz, 1252);
|
|
tobjs.stream_if_ctx = &packet_stream_ctx;
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
|
|
g_ctl_settings.tcs_can_send = 1;
|
|
tobjs.stream_if = &packetization_inside_once_stream_if;
|
|
tobjs.ctor_flags |= SCF_DISP_RW_ONCE;
|
|
|
|
struct lsquic_packet_out *const packet_out
|
|
= lsquic_send_ctl_new_packet_out(&tobjs.send_ctl, 0, PNS_APP, &network_path);
|
|
assert(packet_out);
|
|
const size_t pad_size = packet_out->po_n_alloc
|
|
- 2 /* STREAM header */
|
|
- 5 /* 3-byte HEADERS frame */
|
|
- 3;
|
|
packet_out->po_data_sz = pad_size;
|
|
lsquic_send_ctl_scheduled_one(&tobjs.send_ctl, packet_out);
|
|
|
|
stream = new_stream(&tobjs, 0, buf_out_sz);
|
|
|
|
s = lsquic_stream_send_headers(stream, &headers, 0);
|
|
assert(0 == s);
|
|
|
|
w = lsquic_stream_write(stream, buf_in, buf_in_sz);
|
|
assert(w >= 0);
|
|
lsquic_stream_flush(stream);
|
|
|
|
g_ctl_settings.tcs_can_send++;
|
|
w = lsquic_stream_write(stream, buf_in, buf_in_sz);
|
|
assert(w >= 0);
|
|
lsquic_stream_flush(stream);
|
|
|
|
/* Verify written data: */
|
|
nw = read_from_scheduled_packets(&tobjs.send_ctl, 0, buf_out, buf_out_sz,
|
|
0, &fin, 1);
|
|
{ /* Remove framing and verify contents */
|
|
const unsigned char *src;
|
|
unsigned char *dst;
|
|
uint64_t sz;
|
|
unsigned frame_type;
|
|
int s;
|
|
|
|
src = buf_out;
|
|
dst = buf_out;
|
|
while (src < buf_out + nw)
|
|
{
|
|
frame_type = *src++;
|
|
s = vint_read(src, buf_out + buf_out_sz, &sz);
|
|
assert(s > 0);
|
|
assert(sz < (1 << 14));
|
|
src += s;
|
|
if (src == buf_out + s + 1)
|
|
{
|
|
/* Ignore headers */
|
|
assert(frame_type == HQFT_HEADERS);
|
|
src += sz;
|
|
}
|
|
else
|
|
{
|
|
assert(frame_type == HQFT_DATA);
|
|
if (src + sz > buf_out + nw) /* Chopped DATA frame (last) */
|
|
sz = buf_out + nw - src;
|
|
memmove(dst, src, sz);
|
|
dst += sz;
|
|
src += sz;
|
|
}
|
|
}
|
|
assert(0 == memcmp(buf_in, buf_out, (uintptr_t) dst - (uintptr_t) buf_out));
|
|
}
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
free(buf_in);
|
|
free(buf_out);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
/* Create a new stream frame. Each stream frame has a real packet_in to
|
|
* back it up, just like in real code. The contents of the packet do
|
|
* not matter.
|
|
*/
|
|
static stream_frame_t *
|
|
new_frame_in_ext (struct test_objs *tobjs, size_t off, size_t sz, int fin,
|
|
const void *data)
|
|
{
|
|
lsquic_packet_in_t *packet_in;
|
|
stream_frame_t *frame;
|
|
|
|
assert(sz <= 1370);
|
|
|
|
packet_in = lsquic_mm_get_packet_in(&tobjs->eng_pub.enp_mm);
|
|
if (data)
|
|
packet_in->pi_data = (void *) data;
|
|
else
|
|
{
|
|
packet_in->pi_data = lsquic_mm_get_packet_in_buf(&tobjs->eng_pub.enp_mm, 1370);
|
|
packet_in->pi_flags |= PI_OWN_DATA;
|
|
memset(packet_in->pi_data, 'A', sz);
|
|
}
|
|
/* This is not how stream frame looks in the packet: we have no
|
|
* header. In our test case it does not matter, as we only care
|
|
* about stream frame.
|
|
*/
|
|
packet_in->pi_data_sz = sz;
|
|
packet_in->pi_refcnt = 1;
|
|
|
|
frame = lsquic_malo_get(tobjs->eng_pub.enp_mm.malo.stream_frame);
|
|
memset(frame, 0, sizeof(*frame));
|
|
frame->packet_in = packet_in;
|
|
frame->data_frame.df_offset = off;
|
|
frame->data_frame.df_size = sz;
|
|
frame->data_frame.df_data = &packet_in->pi_data[0];
|
|
frame->data_frame.df_fin = fin;
|
|
|
|
return frame;
|
|
}
|
|
|
|
|
|
/* Receiving DATA frame with zero payload should result in lsquic_stream_read()
|
|
* returning -1.
|
|
*/
|
|
static void
|
|
test_reading_zero_size_data_frame (void)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
struct stream_frame *frame;
|
|
ssize_t nr;
|
|
int s;
|
|
unsigned char buf[2];
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, 0x1000, 0x2000, 1252);
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
|
|
stream = new_stream(&tobjs, 0, 0x1000);
|
|
|
|
/* Fake out reading of HEADERS frame: */
|
|
stream->stream_flags |= STREAM_HAVE_UH;
|
|
stream->sm_hq_filter.hqfi_hist_buf = 1 /* CODE_HEADER */;
|
|
stream->sm_hq_filter.hqfi_hist_idx++;
|
|
|
|
/* One-byte DATA frame */
|
|
frame = new_frame_in_ext(&tobjs, 0, 3, 0, (uint8_t[3]){ 0, 1, 'a', });
|
|
s = lsquic_stream_frame_in(stream, frame);
|
|
assert(s == 0); /* Self-check */
|
|
|
|
/* Zero-length DATA frame */
|
|
frame = new_frame_in_ext(&tobjs, 3, 2, 0, (uint8_t[2]){ 0, 0, });
|
|
s = lsquic_stream_frame_in(stream, frame);
|
|
assert(s == 0); /* Self-check */
|
|
|
|
assert(stream->read_offset == 2); /* Self-check */
|
|
|
|
/* Read 'a' */
|
|
nr = lsquic_stream_read(stream, buf, 1);
|
|
assert(nr == 1);
|
|
assert(buf[0] == 'a');
|
|
|
|
/* Check that read returns -1 */
|
|
nr = lsquic_stream_read(stream, buf, sizeof(buf));
|
|
assert(nr == -1);
|
|
|
|
/* DATA frame was consumed: */
|
|
assert(stream->read_offset == 5);
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
/* Receiving DATA frame with zero payload should result in lsquic_stream_read()
|
|
* returning -1.
|
|
*/
|
|
static void
|
|
test_reading_zero_size_data_frame_scenario2 (void)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
struct stream_frame *frame;
|
|
ssize_t nr;
|
|
int s;
|
|
unsigned char buf[2];
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, 0x1000, 0x2000, 1252);
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
|
|
stream = new_stream(&tobjs, 0, 0x1000);
|
|
|
|
/* Fake out reading of HEADERS frame: */
|
|
stream->stream_flags |= STREAM_HAVE_UH;
|
|
stream->sm_hq_filter.hqfi_hist_buf = 1 /* CODE_HEADER */;
|
|
stream->sm_hq_filter.hqfi_hist_idx++;
|
|
|
|
/* Zero-length DATA frame */
|
|
frame = new_frame_in_ext(&tobjs, 0, 5, 0, (uint8_t[5]){ 0, 1, 'a', 0, 0, });
|
|
s = lsquic_stream_frame_in(stream, frame);
|
|
assert(s == 0); /* Self-check */
|
|
|
|
assert(stream->read_offset == 2); /* Self-check */
|
|
|
|
/* Read 'a' */
|
|
nr = lsquic_stream_read(stream, buf, 1);
|
|
assert(nr == 1);
|
|
assert(buf[0] == 'a');
|
|
|
|
/* Check that read returns -1 */
|
|
nr = lsquic_stream_read(stream, buf, sizeof(buf));
|
|
assert(nr == -1);
|
|
|
|
/* DATA frame was consumed: */
|
|
assert(stream->read_offset == 5);
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
/* Receiving DATA frame with zero payload should result in lsquic_stream_read()
|
|
* returning -1.
|
|
*/
|
|
static void
|
|
test_reading_zero_size_data_frame_scenario3 (void)
|
|
{
|
|
struct test_objs tobjs;
|
|
struct lsquic_stream *stream;
|
|
struct stream_frame *frame;
|
|
ssize_t nr;
|
|
int s;
|
|
unsigned char buf[2];
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
|
|
stream_ctor_flags |= SCF_IETF;
|
|
init_test_objs(&tobjs, 0x1000, 0x2000, 1252);
|
|
tobjs.ctor_flags |= SCF_HTTP|SCF_IETF;
|
|
|
|
stream = new_stream(&tobjs, 0, 0x1000);
|
|
|
|
/* Fake out reading of HEADERS frame: */
|
|
stream->stream_flags |= STREAM_HAVE_UH;
|
|
stream->sm_hq_filter.hqfi_hist_buf = 1 /* CODE_HEADER */;
|
|
stream->sm_hq_filter.hqfi_hist_idx++;
|
|
|
|
/* Zero-length DATA frame */
|
|
frame = new_frame_in_ext(&tobjs, 0, 4, 0, (uint8_t[4]){ 0, 1, 'a', 0, });
|
|
s = lsquic_stream_frame_in(stream, frame);
|
|
assert(s == 0); /* Self-check */
|
|
|
|
assert(stream->read_offset == 2); /* Self-check */
|
|
|
|
/* Read 'a' */
|
|
nr = lsquic_stream_read(stream, buf, 1);
|
|
assert(nr == 1);
|
|
assert(buf[0] == 'a');
|
|
|
|
/* Check that read returns -1 */
|
|
nr = lsquic_stream_read(stream, buf, sizeof(buf));
|
|
assert(nr == -1);
|
|
|
|
/* Zero-length DATA frame */
|
|
frame = new_frame_in_ext(&tobjs, 4, 1, 0, (uint8_t[1]){ 0, });
|
|
s = lsquic_stream_frame_in(stream, frame);
|
|
assert(s == 0); /* Self-check */
|
|
|
|
/* Check that read returns -1 */
|
|
nr = lsquic_stream_read(stream, buf, sizeof(buf));
|
|
assert(nr == -1);
|
|
|
|
/* DATA frame was consumed: */
|
|
assert(stream->read_offset == 5);
|
|
|
|
lsquic_stream_destroy(stream);
|
|
deinit_test_objs(&tobjs);
|
|
|
|
stream_ctor_flags &= ~SCF_IETF;
|
|
}
|
|
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
const char *fuzz_input = NULL;
|
|
int opt, add_one_more;
|
|
unsigned n_packets, extra_sz;
|
|
|
|
lsquic_global_init(LSQUIC_GLOBAL_SERVER);
|
|
|
|
while (-1 != (opt = getopt(argc, argv, "f:l:")))
|
|
{
|
|
switch (opt)
|
|
{
|
|
case 'f':
|
|
fuzz_input = optarg;
|
|
break;
|
|
case 'l':
|
|
lsquic_log_to_fstream(stderr, 0);
|
|
lsquic_logger_lopt(optarg);
|
|
break;
|
|
default:
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
init_test_ctl_settings(&g_ctl_settings);
|
|
|
|
if (fuzz_input)
|
|
fuzz_guided_testing(fuzz_input);
|
|
else
|
|
{
|
|
main_test_hq_framing();
|
|
for (n_packets = 1; n_packets <= 2; ++n_packets)
|
|
for (extra_sz = 0; extra_sz <= 2; ++extra_sz)
|
|
for (add_one_more = 0; add_one_more <= 1; ++add_one_more)
|
|
test_frame_header_split(n_packets, extra_sz, add_one_more);
|
|
test_zero_size_frame();
|
|
test_reading_zero_size_data_frame();
|
|
test_reading_zero_size_data_frame_scenario2();
|
|
test_reading_zero_size_data_frame_scenario3();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char on_being_idle[] =
|
|
"ON BEING IDLE."
|
|
""
|
|
"Now, this is a subject on which I flatter myself I really am _au fait_."
|
|
"The gentleman who, when I was young, bathed me at wisdom's font for nine"
|
|
"guineas a term--no extras--used to say he never knew a boy who could"
|
|
"do less work in more time; and I remember my poor grandmother once"
|
|
"incidentally observing, in the course of an instruction upon the use"
|
|
"of the Prayer-book, that it was highly improbable that I should ever do"
|
|
"much that I ought not to do, but that she felt convinced beyond a doubt"
|
|
"that I should leave undone pretty well everything that I ought to do."
|
|
""
|
|
"I am afraid I have somewhat belied half the dear old lady's prophecy."
|
|
"Heaven help me! I have done a good many things that I ought not to have"
|
|
"done, in spite of my laziness. But I have fully confirmed the accuracy"
|
|
"of her judgment so far as neglecting much that I ought not to have"
|
|
"neglected is concerned. Idling always has been my strong point. I take"
|
|
"no credit to myself in the matter--it is a gift. Few possess it. There"
|
|
"are plenty of lazy people and plenty of slow-coaches, but a genuine"
|
|
"idler is a rarity. He is not a man who slouches about with his hands in"
|
|
"his pockets. On the contrary, his most startling characteristic is that"
|
|
"he is always intensely busy."
|
|
""
|
|
"It is impossible to enjoy idling thoroughly unless one has plenty of"
|
|
"work to do. There is no fun in doing nothing when you have nothing to"
|
|
"do. Wasting time is merely an occupation then, and a most exhausting"
|
|
"one. Idleness, like kisses, to be sweet must be stolen."
|
|
""
|
|
"Many years ago, when I was a young man, I was taken very ill--I never"
|
|
"could see myself that much was the matter with me, except that I had"
|
|
"a beastly cold. But I suppose it was something very serious, for the"
|
|
"doctor said that I ought to have come to him a month before, and that"
|
|
"if it (whatever it was) had gone on for another week he would not have"
|
|
"answered for the consequences. It is an extraordinary thing, but I"
|
|
"never knew a doctor called into any case yet but what it transpired"
|
|
"that another day's delay would have rendered cure hopeless. Our medical"
|
|
"guide, philosopher, and friend is like the hero in a melodrama--he"
|
|
"always comes upon the scene just, and only just, in the nick of time. It"
|
|
"is Providence, that is what it is."
|
|
""
|
|
"Well, as I was saying, I was very ill and was ordered to Buxton for a"
|
|
"month, with strict injunctions to do nothing whatever all the while"
|
|
"that I was there. \"Rest is what you require,\" said the doctor, \"perfect"
|
|
"rest.\""
|
|
""
|
|
"It seemed a delightful prospect. \"This man evidently understands my"
|
|
"complaint,\" said I, and I pictured to myself a glorious time--a four"
|
|
"weeks' _dolce far niente_ with a dash of illness in it. Not too much"
|
|
"illness, but just illness enough--just sufficient to give it the flavor"
|
|
"of suffering and make it poetical. I should get up late, sip chocolate,"
|
|
"and have my breakfast in slippers and a dressing-gown. I should lie out"
|
|
"in the garden in a hammock and read sentimental novels with a melancholy"
|
|
"ending, until the books should fall from my listless hand, and I should"
|
|
"recline there, dreamily gazing into the deep blue of the firmament,"
|
|
"watching the fleecy clouds floating like white-sailed ships across"
|
|
"its depths, and listening to the joyous song of the birds and the low"
|
|
"rustling of the trees. Or, on becoming too weak to go out of doors,"
|
|
"I should sit propped up with pillows at the open window of the"
|
|
"ground-floor front, and look wasted and interesting, so that all the"
|
|
"pretty girls would sigh as they passed by."
|
|
""
|
|
"And twice a day I should go down in a Bath chair to the Colonnade to"
|
|
"drink the waters. Oh, those waters! I knew nothing about them then,"
|
|
"and was rather taken with the idea. \"Drinking the waters\" sounded"
|
|
"fashionable and Queen Anne-fied, and I thought I should like them. But,"
|
|
"ugh! after the first three or four mornings! Sam Weller's description of"
|
|
"them as \"having a taste of warm flat-irons\" conveys only a faint idea of"
|
|
"their hideous nauseousness. If anything could make a sick man get well"
|
|
"quickly, it would be the knowledge that he must drink a glassful of them"
|
|
"every day until he was recovered. I drank them neat for six consecutive"
|
|
"days, and they nearly killed me; but after then I adopted the plan of"
|
|
"taking a stiff glass of brandy-and-water immediately on the top of them,"
|
|
"and found much relief thereby. I have been informed since, by various"
|
|
"eminent medical gentlemen, that the alcohol must have entirely"
|
|
"counteracted the effects of the chalybeate properties contained in the"
|
|
"water. I am glad I was lucky enough to hit upon the right thing."
|
|
;
|
|
|
|
static void
|
|
init_buf (void *buf, size_t sz)
|
|
{
|
|
unsigned char *p = buf;
|
|
unsigned char *const end = (unsigned char*)buf + sz;
|
|
size_t n;
|
|
|
|
while (p < end)
|
|
{
|
|
n = end - p;
|
|
if (sizeof(on_being_idle) - 1 < n)
|
|
n = sizeof(on_being_idle) - 1;
|
|
memcpy(p, on_being_idle, n);
|
|
p +=n;
|
|
}
|
|
|
|
assert(p == end);
|
|
}
|