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/*
* Copyright (c) 2014,2015 DeNA Co., Ltd., Masahiro Nagano
*
* 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/un.h>
#include "h2o.h"
#include "h2o/socketpool.h"
struct rp_handler_t {
h2o_handler_t super;
h2o_url_t upstream; /* host should be NULL-terminated */
h2o_socketpool_t *sockpool; /* non-NULL if config.use_keepalive == 1 */
h2o_proxy_config_vars_t config;
};
static int on_req(h2o_handler_t *_self, h2o_req_t *req)
{
struct rp_handler_t *self = (void *)_self;
h2o_req_overrides_t *overrides = h2o_mem_alloc_pool(&req->pool, sizeof(*overrides));
const h2o_url_scheme_t *scheme;
h2o_iovec_t *authority;
/* setup overrides */
*overrides = (h2o_req_overrides_t){NULL};
if (self->sockpool != NULL) {
overrides->socketpool = self->sockpool;
} else if (self->config.preserve_host) {
overrides->hostport.host = self->upstream.host;
overrides->hostport.port = h2o_url_get_port(&self->upstream);
}
overrides->location_rewrite.match = &self->upstream;
overrides->location_rewrite.path_prefix = req->pathconf->path;
overrides->use_proxy_protocol = self->config.use_proxy_protocol;
overrides->client_ctx = h2o_context_get_handler_context(req->conn->ctx, &self->super);
overrides->headers_cmds = self->config.headers_cmds;
/* determine the scheme and authority */
if (self->config.preserve_host) {
scheme = req->scheme;
authority = &req->authority;
} else {
scheme = self->upstream.scheme;
authority = &self->upstream.authority;
}
/* request reprocess */
h2o_reprocess_request(req, req->method, scheme, *authority,
h2o_build_destination(req, self->upstream.path.base, self->upstream.path.len, 0), overrides, 0);
return 0;
}
static void on_context_init(h2o_handler_t *_self, h2o_context_t *ctx)
{
struct rp_handler_t *self = (void *)_self;
/* use the loop of first context for handling socketpool timeouts */
if (self->sockpool != NULL && self->sockpool->timeout == UINT64_MAX)
h2o_socketpool_set_timeout(self->sockpool, ctx->loop, self->config.keepalive_timeout);
/* setup a specific client context only if we need to */
if (ctx->globalconf->proxy.io_timeout == self->config.io_timeout && !self->config.websocket.enabled &&
self->config.ssl_ctx == ctx->globalconf->proxy.ssl_ctx)
return;
h2o_http1client_ctx_t *client_ctx = h2o_mem_alloc(sizeof(*ctx));
client_ctx->loop = ctx->loop;
client_ctx->getaddr_receiver = &ctx->receivers.hostinfo_getaddr;
if (ctx->globalconf->proxy.io_timeout == self->config.io_timeout) {
client_ctx->io_timeout = &ctx->proxy.io_timeout;
} else {
client_ctx->io_timeout = h2o_mem_alloc(sizeof(*client_ctx->io_timeout));
h2o_timeout_init(client_ctx->loop, client_ctx->io_timeout, self->config.io_timeout);
}
if (self->config.websocket.enabled) {
/* FIXME avoid creating h2o_timeout_t for every path-level context in case the timeout values are the same */
client_ctx->websocket_timeout = h2o_mem_alloc(sizeof(*client_ctx->websocket_timeout));
h2o_timeout_init(client_ctx->loop, client_ctx->websocket_timeout, self->config.websocket.timeout);
} else {
client_ctx->websocket_timeout = NULL;
}
client_ctx->ssl_ctx = self->config.ssl_ctx;
h2o_context_set_handler_context(ctx, &self->super, client_ctx);
}
static void on_context_dispose(h2o_handler_t *_self, h2o_context_t *ctx)
{
struct rp_handler_t *self = (void *)_self;
h2o_http1client_ctx_t *client_ctx = h2o_context_get_handler_context(ctx, &self->super);
if (client_ctx == NULL)
return;
if (client_ctx->io_timeout != &ctx->proxy.io_timeout) {
h2o_timeout_dispose(client_ctx->loop, client_ctx->io_timeout);
free(client_ctx->io_timeout);
}
if (client_ctx->websocket_timeout != NULL) {
h2o_timeout_dispose(client_ctx->loop, client_ctx->websocket_timeout);
free(client_ctx->websocket_timeout);
}
free(client_ctx);
}
static void on_handler_dispose(h2o_handler_t *_self)
{
struct rp_handler_t *self = (void *)_self;
if (self->config.ssl_ctx != NULL)
SSL_CTX_free(self->config.ssl_ctx);
free(self->upstream.host.base);
free(self->upstream.path.base);
if (self->sockpool != NULL) {
h2o_socketpool_dispose(self->sockpool);
free(self->sockpool);
}
}
void h2o_proxy_register_reverse_proxy(h2o_pathconf_t *pathconf, h2o_url_t *upstream, h2o_proxy_config_vars_t *config)
{
struct sockaddr_un sa;
const char *to_sa_err;
struct rp_handler_t *self = (void *)h2o_create_handler(pathconf, sizeof(*self));
self->super.on_context_init = on_context_init;
self->super.on_context_dispose = on_context_dispose;
self->super.dispose = on_handler_dispose;
self->super.on_req = on_req;
to_sa_err = h2o_url_host_to_sun(upstream->host, &sa);
if (config->keepalive_timeout != 0) {
self->sockpool = h2o_mem_alloc(sizeof(*self->sockpool));
int is_ssl = upstream->scheme == &H2O_URL_SCHEME_HTTPS;
if (to_sa_err == h2o_url_host_to_sun_err_is_not_unix_socket) {
h2o_socketpool_init_by_hostport(self->sockpool, upstream->host, h2o_url_get_port(upstream), is_ssl,
SIZE_MAX /* FIXME */);
} else {
assert(to_sa_err == NULL);
h2o_socketpool_init_by_address(self->sockpool, (void *)&sa, sizeof(sa), is_ssl, SIZE_MAX /* FIXME */);
}
}
h2o_url_copy(NULL, &self->upstream, upstream);
if (to_sa_err) {
h2o_strtolower(self->upstream.host.base, self->upstream.host.len);
}
self->config = *config;
if (self->config.ssl_ctx != NULL)
SSL_CTX_up_ref(self->config.ssl_ctx);
}
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