nghttp2/examples/spdylay_ssl.cc

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/*
* Spdylay - SPDY 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>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <cassert>
#include <cstdio>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <string>
#include <iostream>
#include <string>
#include <set>
#include <iomanip>
#include <fstream>
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#include "spdylay_ssl.h"
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namespace spdylay {
bool ssl_debug = false;
Spdylay::Spdylay(int fd, SSL *ssl, const spdylay_session_callbacks *callbacks)
: fd_(fd), ssl_(ssl), want_write_(false)
{
spdylay_session_client_new(&session_, callbacks, this);
}
Spdylay::~Spdylay()
{
spdylay_session_del(session_);
}
int Spdylay::recv()
{
return spdylay_session_recv(session_);
}
int Spdylay::send()
{
return spdylay_session_send(session_);
}
ssize_t Spdylay::send_data(const uint8_t *data, size_t len, int flags)
{
ssize_t r;
r = SSL_write(ssl_, data, len);
return r;
}
ssize_t Spdylay::recv_data(uint8_t *data, size_t len, int flags)
{
ssize_t r;
want_write_ = false;
r = SSL_read(ssl_, data, len);
if(r < 0) {
if(SSL_get_error(ssl_, r) == SSL_ERROR_WANT_WRITE) {
want_write_ = true;
}
}
return r;
}
bool Spdylay::want_read()
{
return spdylay_session_want_read(session_);
}
bool Spdylay::want_write()
{
return spdylay_session_want_write(session_) || want_write_;
}
int Spdylay::fd() const
{
return fd_;
}
int Spdylay::submit_request(const std::string& hostport,
const std::string& path, uint8_t pri,
void *stream_user_data)
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{
const char *nv[] = {
"host", hostport.c_str(),
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"method", "GET",
"scheme", "https",
"url", path.c_str(),
"user-agent", "spdylay/0.0.0",
"version", "HTTP/1.1",
NULL
};
return spdylay_submit_request(session_, pri, nv, NULL, stream_user_data);
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}
bool Spdylay::would_block(int r)
{
int e = SSL_get_error(ssl_, r);
return e == SSL_ERROR_WANT_WRITE || e == SSL_ERROR_WANT_READ;
}
int connect_to(const std::string& host, uint16_t port)
{
struct addrinfo hints;
int fd = -1;
int r;
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char service[10];
snprintf(service, sizeof(service), "%u", port);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
struct addrinfo *res;
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r = getaddrinfo(host.c_str(), service, &hints, &res);
if(r != 0) {
std::cerr << "getaddrinfo: " << gai_strerror(r) << std::endl;
return -1;
}
for(struct addrinfo *rp = res; rp; rp = rp->ai_next) {
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if(fd == -1) {
continue;
}
while((r = connect(fd, rp->ai_addr, rp->ai_addrlen)) == -1 &&
errno == EINTR);
if(r == 0) {
break;
}
close(fd);
fd = -1;
}
freeaddrinfo(res);
return fd;
}
int make_non_block(int fd)
{
int flags, r;
while((flags = fcntl(fd, F_GETFL, 0)) == -1 && errno == EINTR);
if(flags == -1) {
return -1;
}
while((r = fcntl(fd, F_SETFL, flags | O_NONBLOCK)) == -1 && errno == EINTR);
if(r == -1) {
return -1;
}
return 0;
}
ssize_t send_callback(spdylay_session *session,
const uint8_t *data, size_t len, int flags,
void *user_data)
{
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Spdylay *sc = (Spdylay*)user_data;
ssize_t r = sc->send_data(data, len, flags);
if(r < 0) {
if(sc->would_block(r)) {
r = SPDYLAY_ERR_WOULDBLOCK;
} else {
r = SPDYLAY_ERR_CALLBACK_FAILURE;
}
}
return r;
}
ssize_t recv_callback(spdylay_session *session,
uint8_t *data, size_t len, int flags, void *user_data)
{
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Spdylay *sc = (Spdylay*)user_data;
ssize_t r = sc->recv_data(data, len, flags);
if(r < 0) {
if(sc->would_block(r)) {
r = SPDYLAY_ERR_WOULDBLOCK;
} else {
r = SPDYLAY_ERR_CALLBACK_FAILURE;
}
} else if(r == 0) {
r = SPDYLAY_ERR_CALLBACK_FAILURE;
}
return r;
}
namespace {
const char *ctrl_names[] = {
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"SYN_STREAM",
"SYN_REPLY",
"RST_STREAM",
"SETTINGS",
"NOOP",
"PING",
"GOAWAY",
"HEADERS"
};
} // namespace
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namespace {
void print_frame_attr_indent()
{
printf(" ");
}
} // namespace
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void print_nv(char **nv)
{
int i;
for(i = 0; nv[i]; i += 2) {
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print_frame_attr_indent();
printf("%s: %s\n", nv[i], nv[i+1]);
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}
}
void print_timer()
{
timeval tv;
get_timer(&tv);
printf("[%3ld.%03ld]", tv.tv_sec, tv.tv_usec/1000);
}
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namespace {
void print_ctrl_hd(const spdylay_ctrl_hd& hd)
{
printf("<version=%u, flags=%u, length=%d>\n",
hd.version, hd.flags, hd.length);
}
} // namespace
void print_frame(spdylay_frame_type type, spdylay_frame *frame)
{
printf("%s frame ", ctrl_names[type-1]);
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print_ctrl_hd(frame->syn_stream.hd);
switch(type) {
case SPDYLAY_SYN_STREAM:
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print_frame_attr_indent();
printf("(stream_id=%d, assoc_stream_id=%d, pri=%u)\n",
frame->syn_stream.stream_id, frame->syn_stream.assoc_stream_id,
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frame->syn_stream.pri);
print_nv(frame->syn_stream.nv);
break;
case SPDYLAY_SYN_REPLY:
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print_frame_attr_indent();
printf("(stream_id=%d)\n", frame->syn_reply.stream_id);
print_nv(frame->syn_reply.nv);
break;
case SPDYLAY_RST_STREAM:
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print_frame_attr_indent();
printf("(stream_id=%d, status_code=%u)\n",
frame->rst_stream.stream_id, frame->rst_stream.status_code);
break;
case SPDYLAY_SETTINGS:
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print_frame_attr_indent();
printf("(niv=%lu)\n", static_cast<unsigned long>(frame->settings.niv));
for(size_t i = 0; i < frame->settings.niv; ++i) {
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print_frame_attr_indent();
printf("[%d(%u):%u]\n",
frame->settings.iv[i].settings_id,
frame->settings.iv[i].flags, frame->settings.iv[i].value);
}
break;
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case SPDYLAY_PING:
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print_frame_attr_indent();
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printf("(unique_id=%d)\n", frame->ping.unique_id);
break;
case SPDYLAY_GOAWAY:
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print_frame_attr_indent();
printf("(last_good_stream_id=%d)\n", frame->goaway.last_good_stream_id);
break;
case SPDYLAY_HEADERS:
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print_frame_attr_indent();
printf("(stream_id=%d)\n", frame->headers.stream_id);
print_nv(frame->headers.nv);
break;
default:
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printf("\n");
break;
}
}
void on_ctrl_recv_callback
(spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
void *user_data)
{
print_timer();
printf(" recv ");
print_frame(type, frame);
fflush(stdout);
}
void on_data_recv_callback
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(spdylay_session *session, uint8_t flags, int32_t stream_id, int32_t length,
void *user_data)
{
print_timer();
printf(" recv DATA frame (stream_id=%d, flags=%d, length=%d)\n",
stream_id, flags, length);
fflush(stdout);
}
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void on_ctrl_send_callback
(spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
void *user_data)
{
print_timer();
printf(" send ");
print_frame(type, frame);
fflush(stdout);
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}
void ctl_poll(pollfd *pollfd, Spdylay *sc)
{
pollfd->events = 0;
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if(sc->want_read()) {
pollfd->events |= POLLIN;
}
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if(sc->want_write()) {
pollfd->events |= POLLOUT;
}
}
int select_next_proto_cb(SSL* ssl,
unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen,
void *arg)
{
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if(ssl_debug) {
print_timer();
std::cout << " NPN select next protocol: the remote server offers:"
<< std::endl;
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}
for(unsigned int i = 0; i < inlen; i += in[i]+1) {
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if(ssl_debug) {
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std::cout << " * ";
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std::cout.write(reinterpret_cast<const char*>(&in[i+1]), in[i]);
std::cout << std::endl;
}
}
if(spdylay_select_next_protocol(out, outlen, in, inlen) == -1) {
std::cerr << "Server did not advertise spdy/2 protocol." << std::endl;
abort();
}
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if(ssl_debug) {
std::cout << " NPN selected the protocol: "
<< std::string((const char*)*out, (size_t)*outlen) << std::endl;
}
return SSL_TLSEXT_ERR_OK;
}
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void setup_ssl_ctx(SSL_CTX *ssl_ctx)
{
/* Disable SSLv2 and enable all workarounds for buggy servers */
SSL_CTX_set_options(ssl_ctx, SSL_OP_ALL|SSL_OP_NO_SSLv2);
SSL_CTX_set_mode(ssl_ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_mode(ssl_ctx, SSL_MODE_RELEASE_BUFFERS);
SSL_CTX_set_next_proto_select_cb(ssl_ctx, select_next_proto_cb, 0);
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}
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int ssl_handshake(SSL *ssl, int fd)
{
if(SSL_set_fd(ssl, fd) == 0) {
std::cerr << ERR_error_string(ERR_get_error(), 0) << std::endl;
return -1;
}
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int r = SSL_connect(ssl);
if(r <= 0) {
std::cerr << ERR_error_string(ERR_get_error(), 0) << std::endl;
return -1;
}
return 0;
}
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namespace {
timeval base_tv;
} // namespace
void reset_timer()
{
gettimeofday(&base_tv, 0);
}
void get_timer(timeval* tv)
{
gettimeofday(tv, 0);
tv->tv_usec -= base_tv.tv_usec;
tv->tv_sec -= base_tv.tv_sec;
if(tv->tv_usec < 0) {
tv->tv_usec += 1000000;
--tv->tv_sec;
}
}
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} // namespace spdylay