apr_status_t h2_session_start(h2_session *session, int *rv)
{
apr_status_t status = APR_SUCCESS;
h2_config *config;
nghttp2_settings_entry settings[3];
AP_DEBUG_ASSERT(session);
/* Start the conversation by submitting our SETTINGS frame */
*rv = 0;
config = h2_config_get(session->c);
if (session->r) {
const char *s, *cs;
apr_size_t dlen;
h2_stream * stream;
/* better for vhost matching */
config = h2_config_rget(session->r);
/* 'h2c' mode: we should have a 'HTTP2-Settings' header with
* base64 encoded client settings. */
s = apr_table_get(session->r->headers_in, "HTTP2-Settings");
if (!s) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_EINVAL, session->r,
APLOGNO(02931)
"HTTP2-Settings header missing in request");
return APR_EINVAL;
}
cs = NULL;
dlen = h2_util_base64url_decode(&cs, s, session->pool);
if (APLOGrdebug(session->r)) {
char buffer[128];
h2_util_hex_dump(buffer, 128, (char*)cs, dlen);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, session->r,
"upgrading h2c session with HTTP2-Settings: %s -> %s (%d)",
s, buffer, (int)dlen);
}
*rv = nghttp2_session_upgrade(session->ngh2, (uint8_t*)cs, dlen, NULL);
if (*rv != 0) {
status = APR_EINVAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
APLOGNO(02932) "nghttp2_session_upgrade: %s",
nghttp2_strerror(*rv));
return status;
}
/* Now we need to auto-open stream 1 for the request we got. */
*rv = stream_open(session, 1);
if (*rv != 0) {
status = APR_EGENERAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
APLOGNO(02933) "open stream 1: %s",
nghttp2_strerror(*rv));
return status;
}
stream = h2_stream_set_get(session->streams, 1);
if (stream == NULL) {
status = APR_EGENERAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
APLOGNO(02934) "lookup of stream 1");
return status;
}
status = h2_stream_rwrite(stream, session->r);
if (status != APR_SUCCESS) {
return status;
}
status = stream_end_headers(session, stream, 1);
if (status != APR_SUCCESS) {
return status;
}
}
settings[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
settings[0].value = (uint32_t)session->max_stream_count;
settings[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
settings[1].value = h2_config_geti(config, H2_CONF_WIN_SIZE);
settings[2].settings_id = NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE;
settings[2].value = 64*1024;
*rv = nghttp2_submit_settings(session->ngh2, NGHTTP2_FLAG_NONE,
settings,
sizeof(settings)/sizeof(settings[0]));
if (*rv != 0) {
status = APR_EGENERAL;
ap_log_cerror(APLOG_MARK, APLOG_ERR, status, session->c,
APLOGNO(02935) "nghttp2_submit_settings: %s",
nghttp2_strerror(*rv));
}
return status;
}
apr_status_t h2_session_start(h2_session *session)
{
assert(session);
/* Start the conversation by submitting our SETTINGS frame */
apr_status_t status = APR_SUCCESS;
h2_config *config = h2_config_get(session->c);
int rv = 0;
if (session->r) {
/* 'h2c' mode: we should have a 'HTTP2-Settings' header with
* base64 encoded client settings. */
const char *s = apr_table_get(session->r->headers_in, "HTTP2-Settings");
if (!s) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_EINVAL, session->r,
"HTTP2-Settings header missing in request");
return APR_EINVAL;
}
int cslen = apr_base64_decode_len(s);
char *cs = apr_pcalloc(session->r->pool, cslen);
--cslen; /* apr also counts the terminating 0 */
apr_base64_decode(cs, s);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, session->r,
"upgrading h2c session with nghttp2 from %s (%d)",
s, cslen);
rv = nghttp2_session_upgrade(session->ngh2, (uint8_t*)cs, cslen, NULL);
if (rv != 0) {
status = APR_EGENERAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
"nghttp2_session_upgrade: %s", nghttp2_strerror(rv));
return status;
}
/* Now we need to auto-open stream 1 for the request we got. */
rv = stream_open(session, 1);
if (rv != 0) {
status = APR_EGENERAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
"open stream 1: %s", nghttp2_strerror(rv));
return status;
}
h2_stream * stream = h2_stream_set_get(session->streams, 1);
if (stream == NULL) {
status = APR_EGENERAL;
ap_log_rerror(APLOG_MARK, APLOG_ERR, status, session->r,
"lookup of stream 1");
return status;
}
status = h2_stream_rwrite(stream, session->r);
if (status != APR_SUCCESS) {
return status;
}
status = stream_end_headers(session, stream, 1);
if (status != APR_SUCCESS) {
return status;
}
status = h2_stream_write_eos(stream);
if (status != APR_SUCCESS) {
return status;
}
}
nghttp2_settings_entry settings[] = {
{ NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
h2_config_geti(config, H2_CONF_MAX_HL_SIZE) },
{ NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE,
h2_config_geti(config, H2_CONF_WIN_SIZE) },
{NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS,
h2_config_geti(config, H2_CONF_MAX_STREAMS) },
};
rv = nghttp2_submit_settings(session->ngh2, NGHTTP2_FLAG_NONE,
settings,
sizeof(settings)/sizeof(settings[0]));
if (rv != 0) {
status = APR_EGENERAL;
ap_log_cerror(APLOG_MARK, APLOG_ERR, status, session->c,
"nghttp2_submit_settings: %s", nghttp2_strerror(rv));
}
return status;
}
