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nghttp2/src/app_helper.cc

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif // HAVE_SYS_SOCKET_H
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif // HAVE_NETDB_H
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif // HAVE_UNISTD_H
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif // HAVE_FCNTL_H
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif // HAVE_NETINET_IN_H
#include <netinet/tcp.h>
#include <poll.h>
#include <cassert>
#include <cstdio>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <string>
#include <iostream>
#include <string>
#include <set>
#include <iomanip>
#include <fstream>
#include <zlib.h>
#include "app_helper.h"
#include "util.h"
#include "http2.h"
#include "template.h"
namespace nghttp2 {
namespace {
const char *strsettingsid(int32_t id) {
switch (id) {
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
return "SETTINGS_HEADER_TABLE_SIZE";
case NGHTTP2_SETTINGS_ENABLE_PUSH:
return "SETTINGS_ENABLE_PUSH";
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
return "SETTINGS_MAX_CONCURRENT_STREAMS";
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
return "SETTINGS_INITIAL_WINDOW_SIZE";
case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
return "SETTINGS_MAX_FRAME_SIZE";
case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
return "SETTINGS_MAX_HEADER_LIST_SIZE";
case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
return "SETTINGS_ENABLE_CONNECT_PROTOCOL";
case NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES:
return "SETTINGS_NO_RFC7540_PRIORITIES";
default:
return "UNKNOWN";
}
}
} // namespace
namespace {
std::string strframetype(uint8_t type) {
switch (type) {
case NGHTTP2_DATA:
return "DATA";
case NGHTTP2_HEADERS:
return "HEADERS";
case NGHTTP2_PRIORITY:
return "PRIORITY";
case NGHTTP2_RST_STREAM:
return "RST_STREAM";
case NGHTTP2_SETTINGS:
return "SETTINGS";
case NGHTTP2_PUSH_PROMISE:
return "PUSH_PROMISE";
case NGHTTP2_PING:
return "PING";
case NGHTTP2_GOAWAY:
return "GOAWAY";
case NGHTTP2_WINDOW_UPDATE:
return "WINDOW_UPDATE";
case NGHTTP2_ALTSVC:
return "ALTSVC";
case NGHTTP2_ORIGIN:
return "ORIGIN";
case NGHTTP2_PRIORITY_UPDATE:
return "PRIORITY_UPDATE";
}
std::string s = "extension(0x";
s += util::format_hex(&type, 1);
s += ')';
return s;
};
} // namespace
namespace {
bool color_output = false;
} // namespace
void set_color_output(bool f) { color_output = f; }
namespace {
FILE *outfile = stdout;
} // namespace
void set_output(FILE *file) { outfile = file; }
namespace {
void print_frame_attr_indent() { fprintf(outfile, " "); }
} // namespace
namespace {
const char *ansi_esc(const char *code) { return color_output ? code : ""; }
} // namespace
namespace {
const char *ansi_escend() { return color_output ? "\033[0m" : ""; }
} // namespace
namespace {
void print_nv(nghttp2_nv *nv) {
fprintf(outfile, "%s%s%s: %s\n", ansi_esc("\033[1;34m"), nv->name,
ansi_escend(), nv->value);
}
} // namespace
namespace {
void print_nv(nghttp2_nv *nva, size_t nvlen) {
auto end = nva + nvlen;
for (; nva != end; ++nva) {
print_frame_attr_indent();
print_nv(nva);
}
}
} // namespace
void print_timer() {
auto millis = get_timer();
fprintf(outfile, "%s[%3ld.%03ld]%s", ansi_esc("\033[33m"),
(long int)(millis.count() / 1000), (long int)(millis.count() % 1000),
ansi_escend());
}
namespace {
void print_frame_hd(const nghttp2_frame_hd &hd) {
fprintf(outfile, "<length=%zu, flags=0x%02x, stream_id=%d>\n", hd.length,
hd.flags, hd.stream_id);
}
} // namespace
namespace {
void print_flags(const nghttp2_frame_hd &hd) {
std::string s;
switch (hd.type) {
case NGHTTP2_DATA:
if (hd.flags & NGHTTP2_FLAG_END_STREAM) {
s += "END_STREAM";
}
if (hd.flags & NGHTTP2_FLAG_PADDED) {
if (!s.empty()) {
s += " | ";
}
s += "PADDED";
}
break;
case NGHTTP2_HEADERS:
if (hd.flags & NGHTTP2_FLAG_END_STREAM) {
s += "END_STREAM";
}
if (hd.flags & NGHTTP2_FLAG_END_HEADERS) {
if (!s.empty()) {
s += " | ";
}
s += "END_HEADERS";
}
if (hd.flags & NGHTTP2_FLAG_PADDED) {
if (!s.empty()) {
s += " | ";
}
s += "PADDED";
}
if (hd.flags & NGHTTP2_FLAG_PRIORITY) {
if (!s.empty()) {
s += " | ";
}
s += "PRIORITY";
}
break;
case NGHTTP2_PRIORITY:
break;
case NGHTTP2_SETTINGS:
if (hd.flags & NGHTTP2_FLAG_ACK) {
s += "ACK";
}
break;
case NGHTTP2_PUSH_PROMISE:
if (hd.flags & NGHTTP2_FLAG_END_HEADERS) {
s += "END_HEADERS";
}
if (hd.flags & NGHTTP2_FLAG_PADDED) {
if (!s.empty()) {
s += " | ";
}
s += "PADDED";
}
break;
case NGHTTP2_PING:
if (hd.flags & NGHTTP2_FLAG_ACK) {
s += "ACK";
}
break;
}
fprintf(outfile, "; %s\n", s.c_str());
}
} // namespace
enum print_type { PRINT_SEND, PRINT_RECV };
namespace {
const char *frame_name_ansi_esc(print_type ptype) {
return ansi_esc(ptype == PRINT_SEND ? "\033[1;35m" : "\033[1;36m");
}
} // namespace
namespace {
void print_frame(print_type ptype, const nghttp2_frame *frame) {
fprintf(outfile, "%s%s%s frame ", frame_name_ansi_esc(ptype),
strframetype(frame->hd.type).c_str(), ansi_escend());
print_frame_hd(frame->hd);
if (frame->hd.flags) {
print_frame_attr_indent();
print_flags(frame->hd);
}
switch (frame->hd.type) {
case NGHTTP2_DATA:
if (frame->data.padlen > 0) {
print_frame_attr_indent();
fprintf(outfile, "(padlen=%zu)\n", frame->data.padlen);
}
break;
case NGHTTP2_HEADERS:
print_frame_attr_indent();
fprintf(outfile, "(padlen=%zu", frame->headers.padlen);
if (frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
fprintf(outfile, ", dep_stream_id=%d, weight=%u, exclusive=%d",
frame->headers.pri_spec.stream_id, frame->headers.pri_spec.weight,
frame->headers.pri_spec.exclusive);
}
fprintf(outfile, ")\n");
switch (frame->headers.cat) {
case NGHTTP2_HCAT_REQUEST:
print_frame_attr_indent();
fprintf(outfile, "; Open new stream\n");
break;
case NGHTTP2_HCAT_RESPONSE:
print_frame_attr_indent();
fprintf(outfile, "; First response header\n");
break;
case NGHTTP2_HCAT_PUSH_RESPONSE:
print_frame_attr_indent();
fprintf(outfile, "; First push response header\n");
break;
default:
break;
}
print_nv(frame->headers.nva, frame->headers.nvlen);
break;
case NGHTTP2_PRIORITY:
print_frame_attr_indent();
fprintf(outfile, "(dep_stream_id=%d, weight=%u, exclusive=%d)\n",
frame->priority.pri_spec.stream_id, frame->priority.pri_spec.weight,
frame->priority.pri_spec.exclusive);
break;
case NGHTTP2_RST_STREAM:
print_frame_attr_indent();
fprintf(outfile, "(error_code=%s(0x%02x))\n",
nghttp2_http2_strerror(frame->rst_stream.error_code),
frame->rst_stream.error_code);
break;
case NGHTTP2_SETTINGS:
print_frame_attr_indent();
fprintf(outfile, "(niv=%lu)\n",
static_cast<unsigned long>(frame->settings.niv));
for (size_t i = 0; i < frame->settings.niv; ++i) {
print_frame_attr_indent();
fprintf(outfile, "[%s(0x%02x):%u]\n",
strsettingsid(frame->settings.iv[i].settings_id),
frame->settings.iv[i].settings_id, frame->settings.iv[i].value);
}
break;
case NGHTTP2_PUSH_PROMISE:
print_frame_attr_indent();
fprintf(outfile, "(padlen=%zu, promised_stream_id=%d)\n",
frame->push_promise.padlen, frame->push_promise.promised_stream_id);
print_nv(frame->push_promise.nva, frame->push_promise.nvlen);
break;
case NGHTTP2_PING:
print_frame_attr_indent();
fprintf(outfile, "(opaque_data=%s)\n",
util::format_hex(frame->ping.opaque_data, 8).c_str());
break;
case NGHTTP2_GOAWAY:
print_frame_attr_indent();
fprintf(outfile,
"(last_stream_id=%d, error_code=%s(0x%02x), "
"opaque_data(%u)=[%s])\n",
frame->goaway.last_stream_id,
nghttp2_http2_strerror(frame->goaway.error_code),
frame->goaway.error_code,
static_cast<unsigned int>(frame->goaway.opaque_data_len),
util::ascii_dump(frame->goaway.opaque_data,
frame->goaway.opaque_data_len)
.c_str());
break;
case NGHTTP2_WINDOW_UPDATE:
print_frame_attr_indent();
fprintf(outfile, "(window_size_increment=%d)\n",
frame->window_update.window_size_increment);
break;
case NGHTTP2_ALTSVC: {
auto altsvc = static_cast<nghttp2_ext_altsvc *>(frame->ext.payload);
print_frame_attr_indent();
fprintf(outfile, "(origin=[%.*s], altsvc_field_value=[%.*s])\n",
static_cast<int>(altsvc->origin_len), altsvc->origin,
static_cast<int>(altsvc->field_value_len), altsvc->field_value);
break;
}
case NGHTTP2_ORIGIN: {
auto origin = static_cast<nghttp2_ext_origin *>(frame->ext.payload);
for (size_t i = 0; i < origin->nov; ++i) {
auto ent = &origin->ov[i];
print_frame_attr_indent();
fprintf(outfile, "[%.*s]\n", (int)ent->origin_len, ent->origin);
}
break;
}
case NGHTTP2_PRIORITY_UPDATE: {
auto priority_update =
static_cast<nghttp2_ext_priority_update *>(frame->ext.payload);
print_frame_attr_indent();
fprintf(outfile,
"(prioritized_stream_id=%d, priority_field_value=[%.*s])\n",
priority_update->stream_id,
static_cast<int>(priority_update->field_value_len),
priority_update->field_value);
break;
}
default:
break;
}
}
} // namespace
int verbose_on_header_callback(nghttp2_session *session,
const nghttp2_frame *frame, const uint8_t *name,
size_t namelen, const uint8_t *value,
size_t valuelen, uint8_t flags,
void *user_data) {
nghttp2_nv nv = {const_cast<uint8_t *>(name), const_cast<uint8_t *>(value),
namelen, valuelen};
print_timer();
fprintf(outfile, " recv (stream_id=%d", frame->hd.stream_id);
if (flags & NGHTTP2_NV_FLAG_NO_INDEX) {
fprintf(outfile, ", sensitive");
}
fprintf(outfile, ") ");
print_nv(&nv);
fflush(outfile);
return 0;
}
int verbose_on_frame_recv_callback(nghttp2_session *session,
const nghttp2_frame *frame,
void *user_data) {
print_timer();
fprintf(outfile, " recv ");
print_frame(PRINT_RECV, frame);
fflush(outfile);
return 0;
}
int verbose_on_invalid_frame_recv_callback(nghttp2_session *session,
const nghttp2_frame *frame,
int lib_error_code,
void *user_data) {
print_timer();
fprintf(outfile, " [INVALID; error=%s] recv ",
nghttp2_strerror(lib_error_code));
print_frame(PRINT_RECV, frame);
fflush(outfile);
return 0;
}
int verbose_on_frame_send_callback(nghttp2_session *session,
const nghttp2_frame *frame,
void *user_data) {
print_timer();
fprintf(outfile, " send ");
print_frame(PRINT_SEND, frame);
fflush(outfile);
return 0;
}
int verbose_on_data_chunk_recv_callback(nghttp2_session *session, uint8_t flags,
int32_t stream_id, const uint8_t *data,
size_t len, void *user_data) {
print_timer();
auto srecv =
nghttp2_session_get_stream_effective_recv_data_length(session, stream_id);
auto crecv = nghttp2_session_get_effective_recv_data_length(session);
fprintf(outfile,
" recv (stream_id=%d, length=%zu, srecv=%d, crecv=%d) DATA\n",
stream_id, len, srecv, crecv);
fflush(outfile);
return 0;
}
int verbose_error_callback(nghttp2_session *session, int lib_error_code,
const char *msg, size_t len, void *user_data) {
print_timer();
fprintf(outfile, " [ERROR] %.*s\n", (int)len, msg);
fflush(outfile);
return 0;
}
namespace {
std::chrono::steady_clock::time_point base_tv;
} // namespace
void reset_timer() { base_tv = std::chrono::steady_clock::now(); }
std::chrono::milliseconds get_timer() {
return time_delta(std::chrono::steady_clock::now(), base_tv);
}
std::chrono::steady_clock::time_point get_time() {
return std::chrono::steady_clock::now();
}
ssize_t deflate_data(uint8_t *out, size_t outlen, const uint8_t *in,
size_t inlen) {
int rv;
z_stream zst;
uint8_t temp_out[8_k];
auto temp_outlen = sizeof(temp_out);
zst.next_in = Z_NULL;
zst.zalloc = Z_NULL;
zst.zfree = Z_NULL;
zst.opaque = Z_NULL;
rv = deflateInit2(&zst, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 9,
Z_DEFAULT_STRATEGY);
if (rv != Z_OK) {
return -1;
}
zst.avail_in = inlen;
zst.next_in = (uint8_t *)in;
zst.avail_out = temp_outlen;
zst.next_out = temp_out;
rv = deflate(&zst, Z_FINISH);
deflateEnd(&zst);
if (rv != Z_STREAM_END) {
return -1;
}
temp_outlen -= zst.avail_out;
if (temp_outlen > outlen) {
return -1;
}
memcpy(out, temp_out, temp_outlen);
return temp_outlen;
}
} // namespace nghttp2
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