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#include "first.h"
#include <stdlib.h>
#include <string.h>
#include "gw_backend.h"
typedef gw_plugin_config plugin_config;
typedef gw_plugin_data plugin_data;
typedef gw_handler_ctx handler_ctx;
#include "base.h"
#include "array.h"
#include "buffer.h"
#include "log.h"
#include "status_counter.h"
/**
*
* socket proxy (with optional buffering)
*
*/
SETDEFAULTS_FUNC(mod_sockproxy_set_defaults) {
plugin_data *p = p_d;
data_unset *du;
size_t i = 0;
config_values_t cv[] = {
{ "sockproxy.server", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "sockproxy.debug", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "sockproxy.balance", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
force_assert(p->config_storage);
for (i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s;
s = calloc(1, sizeof(plugin_config));
force_assert(s);
s->exts = NULL;
s->exts_auth = NULL;
s->exts_resp = NULL;
s->debug = 0;
cv[0].destination = NULL; /* T_CONFIG_LOCAL */
cv[1].destination = &(s->debug);
cv[2].destination = NULL; /* T_CONFIG_LOCAL */
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
return HANDLER_ERROR;
}
du = array_get_element(config->value, "sockproxy.server");
if (!gw_set_defaults_backend(srv, (gw_plugin_data *)p, du, i, 0)) {
return HANDLER_ERROR;
}
du = array_get_element(config->value, "sockproxy.balance");
if (!gw_set_defaults_balance(srv, s, du)) {
return HANDLER_ERROR;
}
/* disable check-local for all exts (default enabled) */
if (s->exts) { /*(check after gw_set_defaults_backend())*/
for (size_t j = 0; j < s->exts->used; ++j) {
gw_extension *ex = s->exts->exts[j];
for (size_t n = 0; n < ex->used; ++n) {
ex->hosts[n]->check_local = 0;
}
}
}
}
return HANDLER_GO_ON;
}
static handler_t sockproxy_create_env_connect(server *srv, handler_ctx *hctx) {
connection *con = hctx->remote_conn;
con->file_started = 1;
gw_set_transparent(srv, hctx);
http_response_upgrade_read_body_unknown(srv, con);
status_counter_inc(srv, CONST_STR_LEN("sockproxy.requests"));
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_sockproxy_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(exts);
PATCH(exts_auth);
PATCH(exts_resp);
PATCH(debug);
PATCH(ext_mapping);
PATCH(balance);
/* skip the first, the global context */
for (i = 1; i < srv->config_context->used; i++) {
data_config *dc = (data_config *)srv->config_context->data[i];
s = p->config_storage[i];
/* condition didn't match */
if (!config_check_cond(srv, con, dc)) continue;
/* merge config */
for (j = 0; j < dc->value->used; j++) {
data_unset *du = dc->value->data[j];
if (buffer_is_equal_string(du->key, CONST_STR_LEN("sockproxy.server"))) {
PATCH(exts);
PATCH(exts_auth);
PATCH(exts_resp);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("sockproxy.debug"))) {
PATCH(debug);
} else if (buffer_is_equal_string(du->key, CONST_STR_LEN("sockproxy.balance"))) {
PATCH(balance);
}
}
}
return 0;
}
#undef PATCH
static handler_t mod_sockproxy_connection_accept(server *srv, connection *con, void *p_d) {
plugin_data *p = p_d;
handler_t rc;
if (con->mode != DIRECT) return HANDLER_GO_ON;
mod_sockproxy_patch_connection(srv, con, p);
if (NULL == p->conf.exts) return HANDLER_GO_ON;
/*(fake con->uri.path for matching purposes in gw_check_extension())*/
buffer_copy_string_len(con->uri.path, CONST_STR_LEN("/"));
rc = gw_check_extension(srv, con, p, 1, 0);
if (HANDLER_GO_ON != rc) return rc;
if (con->mode == p->id) {
handler_ctx *hctx = con->plugin_ctx[p->id];
hctx->opts.backend = BACKEND_PROXY;
hctx->create_env = sockproxy_create_env_connect;
hctx->response = chunk_buffer_acquire();
con->http_status = -1; /*(skip HTTP processing)*/
}
return HANDLER_GO_ON;
}
int mod_sockproxy_plugin_init(plugin *p);
int mod_sockproxy_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("sockproxy");
p->init = gw_init;
p->cleanup = gw_free;
p->set_defaults = mod_sockproxy_set_defaults;
p->connection_reset = gw_connection_reset;
p->handle_connection_accept= mod_sockproxy_connection_accept;
p->handle_subrequest = gw_handle_subrequest;
p->handle_trigger = gw_handle_trigger;
p->handle_waitpid = gw_handle_waitpid_cb;
p->data = NULL;
return 0;
}
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