#include "first.h"
#include "base.h"
#include "plugin.h"
#include "http_vhostdb.h"
#include "log.h"
#include "stat_cache.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
/**
* vhostdb framework
*/
typedef struct {
buffer *vhostdb_backend_conf;
/* generated */
const http_vhostdb_backend_t *vhostdb_backend;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
plugin_config conf;
buffer *tmp_buf;
} plugin_data;
INIT_FUNC(mod_vhostdb_init) {
plugin_data *p = calloc(1, sizeof(*p));
p->tmp_buf = buffer_init();
return p;
}
FREE_FUNC(mod_vhostdb_free) {
plugin_data *p = p_d;
if (!p) return HANDLER_GO_ON;
if (p->config_storage) {
size_t i;
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s = p->config_storage[i];
if (NULL == s) continue;
buffer_free(s->vhostdb_backend_conf);
free(s);
}
free(p->config_storage);
}
free(p->tmp_buf);
free(p);
UNUSED(srv);
return HANDLER_GO_ON;
}
SETDEFAULTS_FUNC(mod_vhostdb_set_defaults) {
plugin_data *p = p_d;
config_values_t cv[] = {
{ "vhostdb.backend", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
for (size_t i = 0; i < srv->config_context->used; ++i) {
data_config const *config = (data_config const*)srv->config_context->data[i];
plugin_config *s = calloc(1, sizeof(plugin_config));
s->vhostdb_backend_conf = buffer_init();
cv[0].destination = s->vhostdb_backend_conf;
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;
}
if (!buffer_string_is_empty(s->vhostdb_backend_conf)) {
s->vhostdb_backend =
http_vhostdb_backend_get(s->vhostdb_backend_conf);
if (NULL == s->vhostdb_backend) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"vhostdb.backend not supported:",
s->vhostdb_backend_conf);
return HANDLER_ERROR;
}
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_vhostdb_patch_connection(server *srv, connection *con, plugin_data *p) {
plugin_config *s = p->config_storage[0];
PATCH(vhostdb_backend);
/* skip the first, the global context */
for (size_t 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 (size_t j = 0; j < dc->value->used; ++j) {
data_unset *du = dc->value->data[j];
if (buffer_is_equal_string(du->key, CONST_STR_LEN("vhostdb.backend"))) {
PATCH(vhostdb_backend);
}
}
}
return 0;
}
#undef PATCH
typedef struct {
buffer *server_name;
buffer *document_root;
} vhostdb_entry;
static vhostdb_entry * vhostdb_entry_init (void)
{
vhostdb_entry *ve = calloc(1, sizeof(*ve));
ve->server_name = buffer_init();
ve->document_root = buffer_init();
return ve;
}
static void vhostdb_entry_free (vhostdb_entry *ve)
{
buffer_free(ve->server_name);
buffer_free(ve->document_root);
free(ve);
}
CONNECTION_FUNC(mod_vhostdb_handle_connection_close) {
plugin_data *p = p_d;
vhostdb_entry *ve;
if ((ve = con->plugin_ctx[p->id])) {
con->plugin_ctx[p->id] = NULL;
vhostdb_entry_free(ve);
}
UNUSED(srv);
return HANDLER_GO_ON;
}
static handler_t mod_vhostdb_error_500 (connection *con)
{
con->http_status = 500; /* Internal Server Error */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
static handler_t mod_vhostdb_found (connection *con, vhostdb_entry *ve)
{
/* fix virtual server and docroot */
buffer_copy_buffer(con->server_name, ve->server_name);
buffer_copy_buffer(con->physical.doc_root, ve->document_root);
return HANDLER_GO_ON;
}
CONNECTION_FUNC(mod_vhostdb_handle_docroot) {
plugin_data *p = p_d;
vhostdb_entry *ve;
const http_vhostdb_backend_t *backend;
buffer *b;
stat_cache_entry *sce;
/* no host specified? */
if (buffer_string_is_empty(con->uri.authority)) return HANDLER_GO_ON;
/* XXX: future: implement larger, managed cache
* of database responses (positive and negative) */
/* check if cached this connection */
ve = con->plugin_ctx[p->id];
if (ve && buffer_is_equal(ve->server_name, con->uri.authority)) {
return mod_vhostdb_found(con, ve); /* HANDLER_GO_ON */
}
mod_vhostdb_patch_connection(srv, con, p);
if (!p->conf.vhostdb_backend) return HANDLER_GO_ON;
b = p->tmp_buf;
backend = p->conf.vhostdb_backend;
if (0 != backend->query(srv, con, backend->p_d, b)) {
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
if (buffer_string_is_empty(b)) {
/* no such virtual host */
return HANDLER_GO_ON;
}
/* sanity check that really is a directory */
buffer_append_slash(b);
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, b, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb", strerror(errno), b);
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
if (!S_ISDIR(sce->st.st_mode)) {
log_error_write(srv, __FILE__, __LINE__, "sb", "Not a directory", b);
return mod_vhostdb_error_500(con); /* HANDLER_FINISHED */
}
/* cache the data */
if (!ve) con->plugin_ctx[p->id] = ve = vhostdb_entry_init();
buffer_copy_buffer(ve->server_name, con->uri.authority);
buffer_copy_buffer(ve->document_root, b);
return mod_vhostdb_found(con, ve); /* HANDLER_GO_ON */
}
int mod_vhostdb_plugin_init(plugin *p);
int mod_vhostdb_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("vhostdb");
p->init = mod_vhostdb_init;
p->cleanup = mod_vhostdb_free;
p->set_defaults = mod_vhostdb_set_defaults;
p->handle_docroot = mod_vhostdb_handle_docroot;
p->connection_reset = mod_vhostdb_handle_connection_close;
p->data = NULL;
return 0;
}
↑ V522 There might be dereferencing of a potential null pointer 'p'. Check lines: 34, 33.
↑ V522 There might be dereferencing of a potential null pointer 's'. Check lines: 73, 72.
↑ V522 There might be dereferencing of a potential null pointer 'p->config_storage'. Check lines: 77, 68.
↑ V522 There might be dereferencing of a potential null pointer 've'. Check lines: 134, 133.