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litespeed-quic/test/http_client.c
Dmitri Tikhonov 8c1565cb1c Release 2.10.2 
- [BUGFIX] Do not delay ACKs for Initial and Handshake packets.
- [BUGFIX] Send PATH_CHALLENGE if path changed before mini conn promotion.
- Logging improvements.
- http_client: discard data faster.
2020-01-30 17:12:47 -05:00

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/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */
/*
* http_client.c -- A simple HTTP/QUIC client
*/
#ifndef WIN32
#include <arpa/inet.h>
#include <netinet/in.h>
#else
#include <Windows.h>
#include <WinSock2.h>
#include <io.h>
#include <stdlib.h>
#include <getopt.h>
#define STDOUT_FILENO 1
#define random rand
#pragma warning(disable:4996) //POSIX name deprecated
#endif
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/queue.h>
#ifndef WIN32
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <limits.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <event2/event.h>
#include <math.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include "lsquic.h"
#include "test_common.h"
#include "prog.h"
#include "../src/liblsquic/lsquic_logger.h"
#include "../src/liblsquic/lsquic_int_types.h"
#include "../src/liblsquic/lsquic_util.h"
/* include directly for reset_stream testing */
#include "../src/liblsquic/lsquic_varint.h"
#include "../src/liblsquic/lsquic_hq.h"
#include "../src/liblsquic/lsquic_sfcw.h"
#include "../src/liblsquic/lsquic_hash.h"
#include "../src/liblsquic/lsquic_stream.h"
/* include directly for retire_cid testing */
#include "../src/liblsquic/lsquic_conn.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))
/* This is used to exercise generating and sending of priority frames */
static int randomly_reprioritize_streams;
static int s_display_cert_chain;
/* If this file descriptor is open, the client will accept server push and
* dump the contents here. See -u flag.
*/
static int promise_fd = -1;
/* Set to true value to use header bypass. This means that the use code
* creates header set via callbacks and then fetches it by calling
* lsquic_stream_get_hset() when the first "on_read" event is called.
*/
static int g_header_bypass;
static int s_discard_response;
struct sample_stats
{
unsigned n;
unsigned long min, max;
unsigned long sum; /* To calculate mean */
unsigned long sum_X2; /* To calculate stddev */
};
static struct sample_stats s_stat_to_conn, /* Time to connect */
s_stat_ttfb,
s_stat_req; /* From TTFB to EOS */
static unsigned s_stat_conns_ok, s_stat_conns_failed;
static unsigned long s_stat_downloaded_bytes;
static void
update_sample_stats (struct sample_stats *stats, unsigned long val)
{
LSQ_DEBUG("%s: %p: %lu", __func__, stats, val);
if (stats->n)
{
if (val < stats->min)
stats->min = val;
else if (val > stats->max)
stats->max = val;
}
else
{
stats->min = val;
stats->max = val;
}
stats->sum += val;
stats->sum_X2 += val * val;
++stats->n;
}
static void
calc_sample_stats (const struct sample_stats *stats,
long double *mean_p, long double *stddev_p)
{
unsigned long mean, tmp;
if (stats->n)
{
mean = stats->sum / stats->n;
*mean_p = (long double) mean;
if (stats->n > 1)
{
tmp = stats->sum_X2 - stats->n * mean * mean;
tmp /= stats->n - 1;
*stddev_p = sqrtl((long double) tmp);
}
else
*stddev_p = 0;
}
else
{
*mean_p = 0;
*stddev_p = 0;
}
}
#ifdef WIN32
static char *
strndup(const char *s, size_t n)
{
char *copy;
copy = malloc(n + 1);
if (copy)
{
memcpy(copy, s, n);
copy[n] = '\0';
}
return copy;
}
#endif
struct lsquic_conn_ctx;
struct path_elem {
TAILQ_ENTRY(path_elem) next_pe;
const char *path;
};
struct http_client_ctx {
TAILQ_HEAD(, lsquic_conn_ctx)
conn_ctxs;
const char *hostname;
const char *method;
const char *payload;
char payload_size[20];
/* hcc_path_elems holds a list of paths which are to be requested from
* the server. Each new request gets the next path from the list (the
* iterator is stored in hcc_cur_pe); when the end is reached, the
* iterator wraps around.
*/
TAILQ_HEAD(, path_elem) hcc_path_elems;
struct path_elem *hcc_cur_pe;
unsigned hcc_total_n_reqs;
unsigned hcc_reqs_per_conn;
unsigned hcc_concurrency;
unsigned hcc_cc_reqs_per_conn;
unsigned hcc_n_open_conns;
unsigned hcc_reset_after_nbytes;
unsigned hcc_retire_cid_after_nbytes;
char *hcc_zero_rtt_file_name;
enum {
HCC_SKIP_0RTT = (1 << 0),
HCC_SEEN_FIN = (1 << 1),
HCC_ABORT_ON_INCOMPLETE = (1 << 2),
} hcc_flags;
struct prog *prog;
const char *qif_file;
FILE *qif_fh;
};
struct lsquic_conn_ctx {
TAILQ_ENTRY(lsquic_conn_ctx) next_ch;
lsquic_conn_t *conn;
struct http_client_ctx *client_ctx;
lsquic_time_t ch_created;
unsigned ch_n_reqs; /* This number gets decremented as streams are closed and
* incremented as push promises are accepted.
*/
unsigned ch_n_cc_streams; /* This number is incremented as streams are opened
* and decremented as streams are closed. It should
* never exceed hcc_cc_reqs_per_conn in client_ctx.
*/
enum {
CH_ZERO_RTT_SAVED = 1 << 0,
} ch_flags;
};
struct hset_elem
{
STAILQ_ENTRY(hset_elem) next;
unsigned name_idx;
char *name;
char *value;
};
STAILQ_HEAD(hset, hset_elem);
static void
hset_dump (const struct hset *, FILE *);
static void
hset_destroy (void *hset);
static void
display_cert_chain (lsquic_conn_t *);
static void
create_connections (struct http_client_ctx *client_ctx)
{
size_t len;
FILE *file;
unsigned char zero_rtt[0x2000];
if (0 == (client_ctx->hcc_flags & HCC_SKIP_0RTT)
&& client_ctx->hcc_zero_rtt_file_name)
{
file = fopen(client_ctx->hcc_zero_rtt_file_name, "rb");
if (!file)
{
LSQ_DEBUG("cannot open %s for reading: %s",
client_ctx->hcc_zero_rtt_file_name, strerror(errno));
goto no_file;
}
len = fread(zero_rtt, 1, sizeof(zero_rtt), file);
if (0 == len && !feof(file))
LSQ_WARN("error reading %s: %s",
client_ctx->hcc_zero_rtt_file_name, strerror(errno));
fclose(file);
LSQ_INFO("create connection zero_rtt %zu bytes", len);
}
else no_file:
len = 0;
while (client_ctx->hcc_n_open_conns < client_ctx->hcc_concurrency &&
client_ctx->hcc_total_n_reqs > 0)
if (0 != prog_connect(client_ctx->prog, len ? zero_rtt : NULL, len))
{
LSQ_ERROR("connection failed");
exit(EXIT_FAILURE);
}
}
static void
create_streams (struct http_client_ctx *client_ctx, lsquic_conn_ctx_t *conn_h)
{
while (conn_h->ch_n_reqs - conn_h->ch_n_cc_streams &&
conn_h->ch_n_cc_streams < client_ctx->hcc_cc_reqs_per_conn)
{
lsquic_conn_make_stream(conn_h->conn);
conn_h->ch_n_cc_streams++;
}
}
static lsquic_conn_ctx_t *
http_client_on_new_conn (void *stream_if_ctx, lsquic_conn_t *conn)
{
struct http_client_ctx *client_ctx = stream_if_ctx;
lsquic_conn_ctx_t *conn_h = calloc(1, sizeof(*conn_h));
conn_h->conn = conn;
conn_h->client_ctx = client_ctx;
conn_h->ch_n_reqs = MIN(client_ctx->hcc_total_n_reqs,
client_ctx->hcc_reqs_per_conn);
client_ctx->hcc_total_n_reqs -= conn_h->ch_n_reqs;
TAILQ_INSERT_TAIL(&client_ctx->conn_ctxs, conn_h, next_ch);
++conn_h->client_ctx->hcc_n_open_conns;
if (!TAILQ_EMPTY(&client_ctx->hcc_path_elems))
create_streams(client_ctx, conn_h);
conn_h->ch_created = lsquic_time_now();
return conn_h;
}
struct create_another_conn_or_stop_ctx
{
struct event *event;
struct http_client_ctx *client_ctx;
};
static void
create_another_conn_or_stop (evutil_socket_t sock, short events, void *ctx)
{
struct create_another_conn_or_stop_ctx *const cacos = ctx;
struct http_client_ctx *const client_ctx = cacos->client_ctx;
event_del(cacos->event);
event_free(cacos->event);
free(cacos);
create_connections(client_ctx);
if (0 == client_ctx->hcc_n_open_conns)
{
LSQ_INFO("All connections are closed: stop engine");
prog_stop(client_ctx->prog);
}
}
static void
http_client_on_conn_closed (lsquic_conn_t *conn)
{
lsquic_conn_ctx_t *conn_h = lsquic_conn_get_ctx(conn);
struct create_another_conn_or_stop_ctx *cacos;
enum LSQUIC_CONN_STATUS status;
struct event_base *eb;
char errmsg[80];
status = lsquic_conn_status(conn, errmsg, sizeof(errmsg));
LSQ_INFO("Connection closed. Status: %d. Message: %s", status,
errmsg[0] ? errmsg : "<not set>");
if (conn_h->client_ctx->hcc_flags & HCC_ABORT_ON_INCOMPLETE)
{
if (!(conn_h->client_ctx->hcc_flags & HCC_SEEN_FIN))
abort();
}
TAILQ_REMOVE(&conn_h->client_ctx->conn_ctxs, conn_h, next_ch);
--conn_h->client_ctx->hcc_n_open_conns;
cacos = calloc(1, sizeof(*cacos));
if (!cacos)
{
LSQ_ERROR("cannot allocate cacos");
exit(1);
}
eb = prog_eb(conn_h->client_ctx->prog);
cacos->client_ctx = conn_h->client_ctx;
cacos->event = event_new(eb, -1, 0, create_another_conn_or_stop, cacos);
if (!cacos->event)
{
LSQ_ERROR("cannot allocate event");
exit(1);
}
if (0 != event_add(cacos->event, NULL))
{
LSQ_ERROR("cannot add cacos event");
exit(1);
}
event_active(cacos->event, 0, 0);
free(conn_h);
}
static int
hsk_status_ok (enum lsquic_hsk_status status)
{
return status == LSQ_HSK_OK || status == LSQ_HSK_0RTT_OK;
}
static void
http_client_on_hsk_done (lsquic_conn_t *conn, enum lsquic_hsk_status status)
{
lsquic_conn_ctx_t *conn_h = lsquic_conn_get_ctx(conn);
struct http_client_ctx *client_ctx = conn_h->client_ctx;
if (hsk_status_ok(status))
LSQ_INFO("handshake success %s",
status == LSQ_HSK_0RTT_OK ? "with 0-RTT" : "");
else if (status == LSQ_HSK_FAIL)
LSQ_INFO("handshake failed");
else if (status == LSQ_HSK_0RTT_FAIL)
{
LSQ_INFO("handshake failed because of 0-RTT, will retry without it");
client_ctx->hcc_flags |= HCC_SKIP_0RTT;
++client_ctx->hcc_concurrency;
++client_ctx->hcc_total_n_reqs;
}
else
assert(0);
if (hsk_status_ok(status) && s_display_cert_chain)
display_cert_chain(conn);
if (hsk_status_ok(status))
{
conn_h = lsquic_conn_get_ctx(conn);
++s_stat_conns_ok;
update_sample_stats(&s_stat_to_conn,
lsquic_time_now() - conn_h->ch_created);
if (TAILQ_EMPTY(&client_ctx->hcc_path_elems))
{
LSQ_INFO("no paths mode: close connection");
lsquic_conn_close(conn_h->conn);
}
}
else
++s_stat_conns_failed;
}
static void
http_client_on_zero_rtt_info (lsquic_conn_t *conn, const unsigned char *buf,
size_t bufsz)
{
lsquic_conn_ctx_t *const conn_h = lsquic_conn_get_ctx(conn);
struct http_client_ctx *const client_ctx = conn_h->client_ctx;
FILE *file;
size_t nw;
assert(client_ctx->hcc_zero_rtt_file_name);
/* Our client is rather limited: only one file and only one ticket per
* connection can be saved.
*/
if (conn_h->ch_flags & CH_ZERO_RTT_SAVED)
{
LSQ_DEBUG("zero-rtt already saved for this connection");
return;
}
file = fopen(client_ctx->hcc_zero_rtt_file_name, "wb");
if (!file)
{
LSQ_WARN("cannot open %s for writing: %s",
client_ctx->hcc_zero_rtt_file_name, strerror(errno));
return;
}
nw = fwrite(buf, 1, bufsz, file);
if (nw == bufsz)
{
LSQ_DEBUG("wrote %zd bytes of zero-rtt information to %s",
nw, client_ctx->hcc_zero_rtt_file_name);
conn_h->ch_flags |= CH_ZERO_RTT_SAVED;
}
else
LSQ_WARN("error: fwrite(%s) returns %zd instead of %zd: %s",
client_ctx->hcc_zero_rtt_file_name, nw, bufsz, strerror(errno));
fclose(file);
}
struct lsquic_stream_ctx {
lsquic_stream_t *stream;
struct http_client_ctx *client_ctx;
const char *path;
enum {
HEADERS_SENT = (1 << 0),
PROCESSED_HEADERS = 1 << 1,
} sh_flags;
lsquic_time_t sh_created;
lsquic_time_t sh_ttfb;
unsigned count;
struct lsquic_reader reader;
};
static lsquic_stream_ctx_t *
http_client_on_new_stream (void *stream_if_ctx, lsquic_stream_t *stream)
{
const int pushed = lsquic_stream_is_pushed(stream);
if (pushed)
{
LSQ_INFO("not accepting server push");
lsquic_stream_refuse_push(stream);
return NULL;
}
lsquic_stream_ctx_t *st_h = calloc(1, sizeof(*st_h));
st_h->stream = stream;
st_h->client_ctx = stream_if_ctx;
st_h->sh_created = lsquic_time_now();
if (st_h->client_ctx->hcc_cur_pe)
{
st_h->client_ctx->hcc_cur_pe = TAILQ_NEXT(
st_h->client_ctx->hcc_cur_pe, next_pe);
if (!st_h->client_ctx->hcc_cur_pe) /* Wrap around */
st_h->client_ctx->hcc_cur_pe =
TAILQ_FIRST(&st_h->client_ctx->hcc_path_elems);
}
else
st_h->client_ctx->hcc_cur_pe = TAILQ_FIRST(
&st_h->client_ctx->hcc_path_elems);
st_h->path = st_h->client_ctx->hcc_cur_pe->path;
if (st_h->client_ctx->payload)
{
st_h->reader.lsqr_read = test_reader_read;
st_h->reader.lsqr_size = test_reader_size;
st_h->reader.lsqr_ctx = create_lsquic_reader_ctx(st_h->client_ctx->payload);
if (!st_h->reader.lsqr_ctx)
exit(1);
}
else
st_h->reader.lsqr_ctx = NULL;
LSQ_INFO("created new stream, path: %s", st_h->path);
lsquic_stream_wantwrite(stream, 1);
if (randomly_reprioritize_streams)
lsquic_stream_set_priority(stream, 1 + (random() & 0xFF));
return st_h;
}
static void
send_headers (lsquic_stream_ctx_t *st_h)
{
const char *hostname = st_h->client_ctx->hostname;
if (!hostname)
hostname = st_h->client_ctx->prog->prog_hostname;
lsquic_http_header_t headers_arr[] = {
{
.name = { .iov_base = ":method", .iov_len = 7, },
.value = { .iov_base = (void *) st_h->client_ctx->method,
.iov_len = strlen(st_h->client_ctx->method), },
},
{
.name = { .iov_base = ":scheme", .iov_len = 7, },
.value = { .iov_base = "https", .iov_len = 5, }
},
{
.name = { .iov_base = ":path", .iov_len = 5, },
.value = { .iov_base = (void *) st_h->path,
.iov_len = strlen(st_h->path), },
},
{
.name = { ":authority", 10, },
.value = { .iov_base = (void *) hostname,
.iov_len = strlen(hostname), },
},
/*
{
.name = { "host", 4 },
.value = { .iov_base = (void *) st_h->client_ctx->hostname,
.iov_len = strlen(st_h->client_ctx->hostname), },
},
*/
{
.name = { .iov_base = "user-agent", .iov_len = 10, },
.value = { .iov_base = (char *) st_h->client_ctx->prog->prog_settings.es_ua,
.iov_len = strlen(st_h->client_ctx->prog->prog_settings.es_ua), },
},
/* The following headers only gets sent if there is request payload: */
{
.name = { .iov_base = "content-type", .iov_len = 12, },
.value = { .iov_base = "application/octet-stream", .iov_len = 24, },
},
{
.name = { .iov_base = "content-length", .iov_len = 14, },
.value = { .iov_base = (void *) st_h->client_ctx->payload_size,
.iov_len = strlen(st_h->client_ctx->payload_size), },
},
};
lsquic_http_headers_t headers = {
.count = sizeof(headers_arr) / sizeof(headers_arr[0]),
.headers = headers_arr,
};
if (!st_h->client_ctx->payload)
headers.count -= 2;
if (0 != lsquic_stream_send_headers(st_h->stream, &headers,
st_h->client_ctx->payload == NULL))
{
LSQ_ERROR("cannot send headers: %s", strerror(errno));
exit(1);
}
}
/* This is here to exercise lsquic_conn_get_server_cert_chain() API */
static void
display_cert_chain (lsquic_conn_t *conn)
{
STACK_OF(X509) *chain;
X509_NAME *name;
X509 *cert;
unsigned i;
char buf[100];
chain = lsquic_conn_get_server_cert_chain(conn);
if (!chain)
{
LSQ_WARN("could not get server certificate chain");
return;
}
for (i = 0; i < sk_X509_num(chain); ++i)
{
cert = sk_X509_value(chain, i);
name = X509_get_subject_name(cert);
LSQ_INFO("cert #%u: name: %s", i,
X509_NAME_oneline(name, buf, sizeof(buf)));
X509_free(cert);
}
sk_X509_free(chain);
}
static void
http_client_on_write (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
ssize_t nw;
if (st_h->sh_flags & HEADERS_SENT)
{
if (st_h->client_ctx->payload && test_reader_size(st_h->reader.lsqr_ctx) > 0)
{
nw = lsquic_stream_writef(stream, &st_h->reader);
if (nw < 0)
{
LSQ_ERROR("write error: %s", strerror(errno));
exit(1);
}
if (test_reader_size(st_h->reader.lsqr_ctx) > 0)
{
lsquic_stream_wantwrite(stream, 1);
}
else
{
lsquic_stream_shutdown(stream, 1);
lsquic_stream_wantread(stream, 1);
}
}
else
{
lsquic_stream_shutdown(stream, 1);
lsquic_stream_wantread(stream, 1);
}
}
else
{
st_h->sh_flags |= HEADERS_SENT;
send_headers(st_h);
}
}
static size_t
discard (void *ctx, const unsigned char *buf, size_t sz, int fin)
{
return sz;
}
static void
http_client_on_read (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
struct http_client_ctx *const client_ctx = st_h->client_ctx;
struct hset *hset;
ssize_t nread;
unsigned old_prio, new_prio;
unsigned char buf[0x200];
unsigned nreads = 0;
#ifdef WIN32
srand(GetTickCount());
#endif
do
{
if (g_header_bypass && !(st_h->sh_flags & PROCESSED_HEADERS))
{
hset = lsquic_stream_get_hset(stream);
if (!hset)
{
LSQ_ERROR("could not get header set from stream");
exit(2);
}
st_h->sh_ttfb = lsquic_time_now();
update_sample_stats(&s_stat_ttfb, st_h->sh_ttfb - st_h->sh_created);
if (s_discard_response)
LSQ_DEBUG("discard response: do not dump headers");
else
hset_dump(hset, stdout);
hset_destroy(hset);
st_h->sh_flags |= PROCESSED_HEADERS;
}
else if (nread = (s_discard_response
? lsquic_stream_readf(stream, discard, NULL)
: lsquic_stream_read(stream, buf, sizeof(buf))),
nread > 0)
{
s_stat_downloaded_bytes += nread;
/* test stream_reset after some number of read bytes */
if (client_ctx->hcc_reset_after_nbytes &&
s_stat_downloaded_bytes > client_ctx->hcc_reset_after_nbytes)
{
lsquic_stream_reset(stream, 0x1);
break;
}
/* test retire_cid after some number of read bytes */
if (client_ctx->hcc_retire_cid_after_nbytes &&
s_stat_downloaded_bytes > client_ctx->hcc_retire_cid_after_nbytes)
{
lsquic_conn_retire_cid(lsquic_stream_conn(stream));
client_ctx->hcc_retire_cid_after_nbytes = 0;
break;
}
if (!g_header_bypass && !(st_h->sh_flags & PROCESSED_HEADERS))
{
/* First read is assumed to be the first byte */
st_h->sh_ttfb = lsquic_time_now();
update_sample_stats(&s_stat_ttfb,
st_h->sh_ttfb - st_h->sh_created);
st_h->sh_flags |= PROCESSED_HEADERS;
}
if (!s_discard_response)
fwrite(buf, 1, nread, stdout);
if (randomly_reprioritize_streams && (st_h->count++ & 0x3F) == 0)
{
old_prio = lsquic_stream_priority(stream);
new_prio = 1 + (random() & 0xFF);
#ifndef NDEBUG
const int s =
#endif
lsquic_stream_set_priority(stream, new_prio);
assert(s == 0);
LSQ_DEBUG("changed stream %"PRIu64" priority from %u to %u",
lsquic_stream_id(stream), old_prio, new_prio);
}
}
else if (0 == nread)
{
update_sample_stats(&s_stat_req, lsquic_time_now() - st_h->sh_ttfb);
client_ctx->hcc_flags |= HCC_SEEN_FIN;
lsquic_stream_shutdown(stream, 0);
break;
}
else if (client_ctx->prog->prog_settings.es_rw_once && EWOULDBLOCK == errno)
{
LSQ_NOTICE("emptied the buffer in 'once' mode");
break;
}
else if (lsquic_stream_is_rejected(stream))
{
LSQ_NOTICE("stream was rejected");
lsquic_stream_close(stream);
break;
}
else
{
LSQ_ERROR("could not read: %s", strerror(errno));
exit(2);
}
}
while (client_ctx->prog->prog_settings.es_rw_once
&& nreads++ < 3 /* Emulate just a few reads */);
}
static void
http_client_on_close (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
const int pushed = lsquic_stream_is_pushed(stream);
if (pushed)
{
assert(NULL == st_h);
return;
}
LSQ_INFO("%s called", __func__);
struct http_client_ctx *const client_ctx = st_h->client_ctx;
lsquic_conn_t *conn = lsquic_stream_conn(stream);
lsquic_conn_ctx_t *conn_h;
TAILQ_FOREACH(conn_h, &client_ctx->conn_ctxs, next_ch)
if (conn_h->conn == conn)
break;
assert(conn_h);
--conn_h->ch_n_reqs;
--conn_h->ch_n_cc_streams;
if (0 == conn_h->ch_n_reqs)
{
LSQ_INFO("all requests completed, closing connection");
lsquic_conn_close(conn_h->conn);
}
else
{
LSQ_INFO("%u active stream, %u request remain, creating %u new stream",
conn_h->ch_n_cc_streams,
conn_h->ch_n_reqs - conn_h->ch_n_cc_streams,
MIN((conn_h->ch_n_reqs - conn_h->ch_n_cc_streams),
(client_ctx->hcc_cc_reqs_per_conn - conn_h->ch_n_cc_streams)));
create_streams(client_ctx, conn_h);
}
if (st_h->reader.lsqr_ctx)
destroy_lsquic_reader_ctx(st_h->reader.lsqr_ctx);
free(st_h);
}
static struct lsquic_stream_if http_client_if = {
.on_new_conn = http_client_on_new_conn,
.on_conn_closed = http_client_on_conn_closed,
.on_new_stream = http_client_on_new_stream,
.on_read = http_client_on_read,
.on_write = http_client_on_write,
.on_close = http_client_on_close,
.on_hsk_done = http_client_on_hsk_done,
};
static void
usage (const char *prog)
{
const char *const slash = strrchr(prog, '/');
if (slash)
prog = slash + 1;
printf(
"Usage: %s [opts]\n"
"\n"
"Options:\n"
" -p PATH Path to request. May be specified more than once. If no\n"
" path is specified, the connection is closed as soon as\n"
" handshake succeeds.\n"
" -n CONNS Number of concurrent connections. Defaults to 1.\n"
" -r NREQS Total number of requests to send. Defaults to 1.\n"
" -R MAXREQS Maximum number of requests per single connection. Some\n"
" connections will have fewer requests than this.\n"
" -w CONCUR Number of concurrent requests per single connection.\n"
" Defaults to 1.\n"
" -M METHOD Method. Defaults to GET.\n"
" -P PAYLOAD Name of the file that contains payload to be used in the\n"
" request. This adds two more headers to the request:\n"
" content-type: application/octet-stream and\n"
" content-length\n"
" -K Discard server response\n"
" -I Abort on incomplete reponse from server\n"
" -4 Prefer IPv4 when resolving hostname\n"
" -6 Prefer IPv6 when resolving hostname\n"
" -0 FILE Provide RTT info file (reading or writing)\n"
#ifndef WIN32
" -C DIR Certificate store. If specified, server certificate will\n"
" be verified.\n"
#endif
" -a Display server certificate chain after successful handshake.\n"
" -b N_BYTES Send RESET_STREAM frame after the client has read n bytes.\n"
" -t Print stats to stdout.\n"
" -T FILE Print stats to FILE. If FILE is -, print stats to stdout.\n"
" -q FILE QIF mode: issue requests from the QIF file and validate\n"
" server responses.\n"
" -e TOKEN Hexadecimal string representing resume token.\n"
, prog);
}
#ifndef WIN32
static X509_STORE *store;
/* Windows does not have regex... */
static int
ends_in_pem (const char *s)
{
int len;
len = strlen(s);
return len >= 4
&& 0 == strcasecmp(s + len - 4, ".pem");
}
static X509 *
file2cert (const char *path)
{
X509 *cert = NULL;
BIO *in;
in = BIO_new(BIO_s_file());
if (!in)
goto end;
if (BIO_read_filename(in, path) <= 0)
goto end;
cert = PEM_read_bio_X509_AUX(in, NULL, NULL, NULL);
end:
BIO_free(in);
return cert;
}
static int
init_x509_cert_store (const char *path)
{
struct dirent *ent;
X509 *cert;
DIR *dir;
char file_path[NAME_MAX];
int ret;
dir = opendir(path);
if (!dir)
{
LSQ_WARN("Cannot open directory `%s': %s", path, strerror(errno));
return -1;
}
store = X509_STORE_new();
while ((ent = readdir(dir)))
{
if (ends_in_pem(ent->d_name))
{
ret = snprintf(file_path, sizeof(file_path), "%s/%s",
path, ent->d_name);
if (ret < 0)
{
LSQ_WARN("file_path formatting error %s", strerror(errno));
continue;
}
else if ((unsigned)ret >= sizeof(file_path))
{
LSQ_WARN("file_path was truncated %s", strerror(errno));
continue;
}
cert = file2cert(file_path);
if (cert)
{
if (1 != X509_STORE_add_cert(store, cert))
LSQ_WARN("could not add cert from %s", file_path);
}
else
LSQ_WARN("could not read cert from %s", file_path);
}
}
(void) closedir(dir);
return 0;
}
static int
verify_server_cert (void *ctx, STACK_OF(X509) *chain)
{
X509_STORE_CTX store_ctx;
X509 *cert;
int ver;
if (!store)
{
if (0 != init_x509_cert_store(ctx))
return -1;
}
cert = sk_X509_shift(chain);
X509_STORE_CTX_init(&store_ctx, store, cert, chain);
ver = X509_verify_cert(&store_ctx);
X509_STORE_CTX_cleanup(&store_ctx);
if (ver != 1)
LSQ_WARN("could not verify server certificate");
return ver == 1 ? 0 : -1;
}
#endif
static void *
hset_create (void *hsi_ctx, int is_push_promise)
{
struct hset *hset;
if (s_discard_response)
return (void *) 1;
else if ((hset = malloc(sizeof(*hset))))
{
STAILQ_INIT(hset);
return hset;
}
else
return NULL;
}
static enum lsquic_header_status
hset_add_header (void *hset_p, unsigned name_idx,
const char *name, unsigned name_len,
const char *value, unsigned value_len)
{
struct hset *hset = hset_p;
struct hset_elem *el;
if (name)
s_stat_downloaded_bytes += name_len + value_len + 4; /* ": \r\n" */
else
s_stat_downloaded_bytes += 2; /* \r\n "*/
if (s_discard_response)
return LSQUIC_HDR_OK;
if (!name) /* This signals end of headers. We do no post-processing. */
return LSQUIC_HDR_OK;
el = malloc(sizeof(*el));
if (!el)
return LSQUIC_HDR_ERR_NOMEM;
el->name = strndup(name, name_len);
el->value = strndup(value, value_len);
if (!(el->name && el->value))
{
free(el->name);
free(el->value);
free(el);
return LSQUIC_HDR_ERR_NOMEM;
}
el->name_idx = name_idx;
STAILQ_INSERT_TAIL(hset, el, next);
return LSQUIC_HDR_OK;
}
static void
hset_destroy (void *hset_p)
{
struct hset *hset = hset_p;
struct hset_elem *el, *next;
if (!s_discard_response)
{
for (el = STAILQ_FIRST(hset); el; el = next)
{
next = STAILQ_NEXT(el, next);
free(el->name);
free(el->value);
free(el);
}
free(hset);
}
}
static void
hset_dump (const struct hset *hset, FILE *out)
{
const struct hset_elem *el;
STAILQ_FOREACH(el, hset, next)
if (el->name_idx)
fprintf(out, "%s (static table idx %u): %s\n", el->name,
el->name_idx, el->value);
else
fprintf(out, "%s: %s\n", el->name, el->value);
fprintf(out, "\n");
fflush(out);
}
/* These are basic and for illustration purposes only. You will want to
* do your own verification by doing something similar to what is done
* in src/liblsquic/lsquic_http1x_if.c
*/
static const struct lsquic_hset_if header_bypass_api =
{
.hsi_create_header_set = hset_create,
.hsi_process_header = hset_add_header,
.hsi_discard_header_set = hset_destroy,
};
static void
display_stat (FILE *out, const struct sample_stats *stats, const char *name)
{
long double mean, stddev;
calc_sample_stats(stats, &mean, &stddev);
fprintf(out, "%s: n: %u; min: %.2Lf ms; max: %.2Lf ms; mean: %.2Lf ms; "
"sd: %.2Lf ms\n", name, stats->n, (long double) stats->min / 1000,
(long double) stats->max / 1000, mean / 1000, stddev / 1000);
}
static lsquic_conn_ctx_t *
qif_client_on_new_conn (void *stream_if_ctx, lsquic_conn_t *conn)
{
lsquic_conn_make_stream(conn);
return stream_if_ctx;
}
static void
qif_client_on_conn_closed (lsquic_conn_t *conn)
{
struct http_client_ctx *client_ctx = (void *) lsquic_conn_get_ctx(conn);
LSQ_INFO("connection is closed: stop engine");
prog_stop(client_ctx->prog);
}
struct qif_stream_ctx
{
int reqno;
struct lsquic_http_headers headers;
char *qif_str;
size_t qif_sz;
size_t qif_off;
char *resp_str; /* qif_sz allocated */
size_t resp_off; /* Read so far */
enum {
QSC_HEADERS_SENT = 1 << 0,
QSC_GOT_HEADERS = 1 << 1,
} flags;
};
#define MAX(a, b) ((a) > (b) ? (a) : (b))
lsquic_stream_ctx_t *
qif_client_on_new_stream (void *stream_if_ctx, lsquic_stream_t *stream)
{
struct http_client_ctx *const client_ctx = stream_if_ctx;
FILE *const fh = client_ctx->qif_fh;
struct qif_stream_ctx *ctx;
struct lsquic_http_header *header;
static int reqno;
size_t nalloc;
int i;
char *end, *tab, *line;
char line_buf[0x1000];
ctx = calloc(1, sizeof(*ctx));
if (!ctx)
{
perror("calloc");
exit(1);
}
ctx->reqno = reqno++;
nalloc = 0;
while ((line = fgets(line_buf, sizeof(line_buf), fh)))
{
end = strchr(line, '\n');
if (!end)
{
fprintf(stderr, "no newline\n");
exit(1);
}
if (end == line)
break;
if (*line == '#')
continue;
tab = strchr(line, '\t');
if (!tab)
{
fprintf(stderr, "no TAB\n");
exit(1);
}
if (nalloc + (end + 1 - line) > ctx->qif_sz)
{
if (nalloc)
nalloc = MAX(nalloc * 2, nalloc + (end + 1 - line));
else
nalloc = end + 1 - line;
ctx->qif_str = realloc(ctx->qif_str, nalloc);
if (!ctx->qif_str)
{
perror("realloc");
exit(1);
}
}
memcpy(ctx->qif_str + ctx->qif_sz, line, end + 1 - line);
ctx->headers.headers = realloc(ctx->headers.headers,
sizeof(ctx->headers.headers[0]) * (ctx->headers.count + 1));
if (!ctx->headers.headers)
{
perror("realloc");
exit(1);
}
header = &ctx->headers.headers[ctx->headers.count++];
header->name.iov_base = (void *) ctx->qif_sz;
header->name.iov_len = tab - line;
header->value.iov_base = (void *) (ctx->qif_sz + (tab - line + 1));
header->value.iov_len = end - tab - 1;
ctx->qif_sz += end + 1 - line;
}
for (i = 0; i < ctx->headers.count; ++i)
{
ctx->headers.headers[i].name.iov_base = ctx->qif_str
+ (uintptr_t) ctx->headers.headers[i].name.iov_base;
ctx->headers.headers[i].value.iov_base = ctx->qif_str
+ (uintptr_t) ctx->headers.headers[i].value.iov_base;
}
lsquic_stream_wantwrite(stream, 1);
if (!line)
{
LSQ_DEBUG("Input QIF file ends; close file handle");
fclose(client_ctx->qif_fh);
client_ctx->qif_fh = NULL;
}
return (void *) ctx;
}
static void
qif_client_on_write (struct lsquic_stream *stream, lsquic_stream_ctx_t *h)
{
struct qif_stream_ctx *const ctx = (void *) h;
size_t towrite;
ssize_t nw;
if (ctx->flags & QSC_HEADERS_SENT)
{
towrite = ctx->qif_sz - ctx->qif_off;
nw = lsquic_stream_write(stream, ctx->qif_str + ctx->qif_off, towrite);
if (nw >= 0)
{
LSQ_DEBUG("wrote %zd bytes to stream", nw);
ctx->qif_off += nw;
if (ctx->qif_off == (size_t) nw)
{
lsquic_stream_shutdown(stream, 1);
lsquic_stream_wantread(stream, 1);
LSQ_DEBUG("finished writing request %d", ctx->reqno);
}
}
else
{
LSQ_ERROR("cannot write to stream: %s", strerror(errno));
lsquic_stream_wantwrite(stream, 0);
lsquic_conn_abort(lsquic_stream_conn(stream));
}
}
else
{
if (0 == lsquic_stream_send_headers(stream, &ctx->headers, 0))
{
ctx->flags |= QSC_HEADERS_SENT;
LSQ_DEBUG("sent headers");
}
else
{
LSQ_ERROR("cannot send headers: %s", strerror(errno));
lsquic_stream_wantwrite(stream, 0);
lsquic_conn_abort(lsquic_stream_conn(stream));
}
}
}
static void
qif_client_on_read (struct lsquic_stream *stream, lsquic_stream_ctx_t *h)
{
struct qif_stream_ctx *const ctx = (void *) h;
struct hset *hset;
ssize_t nr;
unsigned char buf[1];
LSQ_DEBUG("reading response to request %d", ctx->reqno);
if (!(ctx->flags & QSC_GOT_HEADERS))
{
hset = lsquic_stream_get_hset(stream);
if (!hset)
{
LSQ_ERROR("could not get header set from stream");
exit(2);
}
LSQ_DEBUG("got header set for response %d", ctx->reqno);
hset_dump(hset, stdout);
hset_destroy(hset);
ctx->flags |= QSC_GOT_HEADERS;
}
else
{
if (!ctx->resp_str)
{
ctx->resp_str = malloc(ctx->qif_sz);
if (!ctx->resp_str)
{
perror("malloc");
exit(1);
}
}
if (ctx->resp_off < ctx->qif_sz)
{
nr = lsquic_stream_read(stream, ctx->resp_str + ctx->resp_off,
ctx->qif_sz - ctx->resp_off);
if (nr > 0)
{
ctx->resp_off += nr;
LSQ_DEBUG("read %zd bytes of reponse %d", nr, ctx->reqno);
}
else if (nr == 0)
{
LSQ_INFO("response %d too short", ctx->reqno);
LSQ_WARN("response %d FAIL", ctx->reqno);
lsquic_stream_shutdown(stream, 0);
}
else
{
LSQ_ERROR("error reading from stream");
lsquic_stream_wantread(stream, 0);
lsquic_conn_abort(lsquic_stream_conn(stream));
}
}
else
{
/* Collect EOF */
nr = lsquic_stream_read(stream, buf, sizeof(buf));
if (nr == 0)
{
if (0 == memcmp(ctx->qif_str, ctx->resp_str, ctx->qif_sz))
LSQ_INFO("response %d OK", ctx->reqno);
else
LSQ_WARN("response %d FAIL", ctx->reqno);
lsquic_stream_shutdown(stream, 0);
}
else if (nr > 0)
{
LSQ_INFO("response %d too long", ctx->reqno);
LSQ_WARN("response %d FAIL", ctx->reqno);
lsquic_stream_shutdown(stream, 0);
}
else
{
LSQ_ERROR("error reading from stream");
lsquic_stream_shutdown(stream, 0);
lsquic_conn_abort(lsquic_stream_conn(stream));
}
}
}
}
static void
qif_client_on_close (struct lsquic_stream *stream, lsquic_stream_ctx_t *h)
{
struct lsquic_conn *conn = lsquic_stream_conn(stream);
struct http_client_ctx *client_ctx = (void *) lsquic_conn_get_ctx(conn);
struct qif_stream_ctx *const ctx = (void *) h;
free(ctx->qif_str);
free(ctx->resp_str);
free(ctx->headers.headers);
free(ctx);
if (client_ctx->qif_fh)
lsquic_conn_make_stream(conn);
else
lsquic_conn_close(conn);
}
const struct lsquic_stream_if qif_client_if = {
.on_new_conn = qif_client_on_new_conn,
.on_conn_closed = qif_client_on_conn_closed,
.on_new_stream = qif_client_on_new_stream,
.on_read = qif_client_on_read,
.on_write = qif_client_on_write,
.on_close = qif_client_on_close,
};
int
main (int argc, char **argv)
{
int opt, s, was_empty;
lsquic_time_t start_time;
FILE *stats_fh = NULL;
long double elapsed;
struct http_client_ctx client_ctx;
struct stat st;
struct path_elem *pe;
struct sport_head sports;
struct prog prog;
const char *token = NULL;
TAILQ_INIT(&sports);
memset(&client_ctx, 0, sizeof(client_ctx));
TAILQ_INIT(&client_ctx.hcc_path_elems);
TAILQ_INIT(&client_ctx.conn_ctxs);
client_ctx.method = "GET";
client_ctx.hcc_concurrency = 1;
client_ctx.hcc_cc_reqs_per_conn = 1;
client_ctx.hcc_reqs_per_conn = 1;
client_ctx.hcc_total_n_reqs = 1;
client_ctx.hcc_reset_after_nbytes = 0;
client_ctx.hcc_retire_cid_after_nbytes = 0;
client_ctx.prog = &prog;
#ifdef WIN32
WSADATA wsd;
WSAStartup(MAKEWORD(2, 2), &wsd);
#endif
prog_init(&prog, LSENG_HTTP, &sports, &http_client_if, &client_ctx);
while (-1 != (opt = getopt(argc, argv, PROG_OPTS
"46Br:R:IKu:EP:M:n:w:H:p:0:q:e:hatT:b:d:"
#ifndef WIN32
"C:"
#endif
)))
{
switch (opt) {
case 'a':
++s_display_cert_chain;
break;
case '4':
case '6':
prog.prog_ipver = opt - '0';
break;
case 'B':
g_header_bypass = 1;
prog.prog_api.ea_hsi_if = &header_bypass_api;
prog.prog_api.ea_hsi_ctx = NULL;
break;
case 'I':
client_ctx.hcc_flags |= HCC_ABORT_ON_INCOMPLETE;
break;
case 'K':
++s_discard_response;
break;
case 'u': /* Accept p<U>sh promise */
promise_fd = open(optarg, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (promise_fd < 0)
{
perror("open");
exit(1);
}
prog.prog_settings.es_support_push = 1; /* Pokes into prog */
break;
case 'E': /* E: randomly reprioritize str<E>ams. Now, that's
* pretty random. :)
*/
randomly_reprioritize_streams = 1;
break;
case 'n':
client_ctx.hcc_concurrency = atoi(optarg);
break;
case 'w':
client_ctx.hcc_cc_reqs_per_conn = atoi(optarg);
break;
case 'P':
client_ctx.payload = optarg;
if (0 != stat(optarg, &st))
{
perror("stat");
exit(2);
}
sprintf(client_ctx.payload_size, "%jd", (intmax_t) st.st_size);
break;
case 'M':
client_ctx.method = optarg;
break;
case 'r':
client_ctx.hcc_total_n_reqs = atoi(optarg);
break;
case 'R':
client_ctx.hcc_reqs_per_conn = atoi(optarg);
break;
case 'H':
client_ctx.hostname = optarg;
prog.prog_hostname = optarg; /* Pokes into prog */
break;
case 'p':
pe = calloc(1, sizeof(*pe));
pe->path = optarg;
TAILQ_INSERT_TAIL(&client_ctx.hcc_path_elems, pe, next_pe);
break;
case 'h':
usage(argv[0]);
prog_print_common_options(&prog, stdout);
exit(0);
case 'q':
client_ctx.qif_file = optarg;
break;
case 'e':
if (TAILQ_EMPTY(&sports))
token = optarg;
else
sport_set_token(TAILQ_LAST(&sports, sport_head), optarg);
break;
#ifndef WIN32
case 'C':
prog.prog_api.ea_verify_cert = verify_server_cert;
prog.prog_api.ea_verify_ctx = optarg;
break;
#endif
case 't':
stats_fh = stdout;
break;
case 'T':
if (0 == strcmp(optarg, "-"))
stats_fh = stdout;
else
{
stats_fh = fopen(optarg, "w");
if (!stats_fh)
{
perror("fopen");
exit(1);
}
}
break;
case 'b':
client_ctx.hcc_reset_after_nbytes = atoi(optarg);
break;
case 'd':
client_ctx.hcc_retire_cid_after_nbytes = atoi(optarg);
break;
case '0':
http_client_if.on_zero_rtt_info = http_client_on_zero_rtt_info;
client_ctx.hcc_zero_rtt_file_name = optarg;
break;
default:
if (0 != prog_set_opt(&prog, opt, optarg))
exit(1);
}
}
#if LSQUIC_CONN_STATS
prog.prog_api.ea_stats_fh = stats_fh;
#endif
prog.prog_settings.es_ua = LITESPEED_ID;
if (client_ctx.qif_file)
{
client_ctx.qif_fh = fopen(client_ctx.qif_file, "r");
if (!client_ctx.qif_fh)
{
fprintf(stderr, "Cannot open %s for reading: %s\n",
client_ctx.qif_file, strerror(errno));
exit(1);
}
LSQ_NOTICE("opened QIF file %s for reading\n", client_ctx.qif_file);
prog.prog_api.ea_stream_if = &qif_client_if;
g_header_bypass = 1;
prog.prog_api.ea_hsi_if = &header_bypass_api;
prog.prog_api.ea_hsi_ctx = NULL;
}
else if (TAILQ_EMPTY(&client_ctx.hcc_path_elems))
{
fprintf(stderr, "Specify at least one path using -p option\n");
exit(1);
}
start_time = lsquic_time_now();
was_empty = TAILQ_EMPTY(&sports);
if (0 != prog_prep(&prog))
{
LSQ_ERROR("could not prep");
exit(EXIT_FAILURE);
}
if (!(client_ctx.hostname || prog.prog_hostname))
{
fprintf(stderr, "Specify hostname (used for SNI and :authority) via "
"-H option\n");
exit(EXIT_FAILURE);
}
if (was_empty && token)
sport_set_token(TAILQ_LAST(&sports, sport_head), token);
if (client_ctx.qif_file)
{
if (0 != prog_connect(&prog, NULL, 0))
{
LSQ_ERROR("connection failed");
exit(EXIT_FAILURE);
}
}
else
create_connections(&client_ctx);
LSQ_DEBUG("entering event loop");
s = prog_run(&prog);
if (stats_fh)
{
elapsed = (long double) (lsquic_time_now() - start_time) / 1000000;
fprintf(stats_fh, "overall statistics as calculated by %s:\n", argv[0]);
display_stat(stats_fh, &s_stat_to_conn, "time for connect");
display_stat(stats_fh, &s_stat_req, "time for request");
display_stat(stats_fh, &s_stat_ttfb, "time to 1st byte");
fprintf(stats_fh, "downloaded %lu application bytes in %.3Lf seconds\n",
s_stat_downloaded_bytes, elapsed);
fprintf(stats_fh, "%.2Lf reqs/sec; %.0Lf bytes/sec\n",
(long double) s_stat_req.n / elapsed,
(long double) s_stat_downloaded_bytes / elapsed);
fprintf(stats_fh, "read handler count %lu\n", prog.prog_read_count);
}
prog_cleanup(&prog);
if (promise_fd >= 0)
(void) close(promise_fd);
while ((pe = TAILQ_FIRST(&client_ctx.hcc_path_elems)))
{
TAILQ_REMOVE(&client_ctx.hcc_path_elems, pe, next_pe);
free(pe);
}
if (client_ctx.qif_fh)
(void) fclose(client_ctx.qif_fh);
exit(0 == s ? EXIT_SUCCESS : EXIT_FAILURE);
}
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