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-rw-r--r--src/mod_evasive.c200
1 files changed, 0 insertions, 200 deletions
diff --git a/src/mod_evasive.c b/src/mod_evasive.c
deleted file mode 100644
index 1c0e5586..00000000
--- a/src/mod_evasive.c
+++ /dev/null
@@ -1,200 +0,0 @@
-#include <ctype.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "base.h"
-#include "log.h"
-#include "buffer.h"
-
-#include "plugin.h"
-
-#include "inet_ntop_cache.h"
-
-/**
- * mod_evasive
- *
- * we indent to implement all features the mod_evasive from apache has
- *
- * - limit of connections per IP
- * - provide a list of block-listed ip/networks (no access)
- * - provide a white-list of ips/network which is not affected by the limit
- * (hmm, conditionals might be enough)
- * - provide a bandwidth limiter per IP
- *
- * started by:
- * - w1zzard@techpowerup.com
- */
-
-typedef struct {
- unsigned short max_conns;
-} plugin_config;
-
-typedef struct {
- PLUGIN_DATA;
-
- plugin_config **config_storage;
-
- plugin_config conf;
-} plugin_data;
-
-INIT_FUNC(mod_evasive_init) {
- plugin_data *p;
-
- UNUSED(srv);
-
- p = calloc(1, sizeof(*p));
-
- return p;
-}
-
-FREE_FUNC(mod_evasive_free) {
- plugin_data *p = p_d;
-
- UNUSED(srv);
-
- 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];
-
- free(s);
- }
- free(p->config_storage);
- }
-
- free(p);
-
- return HANDLER_GO_ON;
-}
-
-SETDEFAULTS_FUNC(mod_evasive_set_defaults) {
- plugin_data *p = p_d;
- size_t i = 0;
-
- config_values_t cv[] = {
- { "evasive.max-conns-per-ip", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION },
- { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
- };
-
- p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
-
- for (i = 0; i < srv->config_context->used; i++) {
- plugin_config *s;
-
- s = calloc(1, sizeof(plugin_config));
- s->max_conns = 0;
-
- cv[0].destination = &(s->max_conns);
-
- p->config_storage[i] = s;
-
- if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
- return HANDLER_ERROR;
- }
- }
-
- return HANDLER_GO_ON;
-}
-
-static int mod_evasive_patch_connection(server *srv, connection *con, plugin_data *p) {
- size_t i, j;
- plugin_config *s = p->config_storage[0];
-
- PATCH_OPTION(max_conns);
-
- /* 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("evasive.max-conns-per-ip"))) {
- PATCH_OPTION(max_conns);
- }
- }
- }
-
- return 0;
-}
-
-URIHANDLER_FUNC(mod_evasive_uri_handler) {
- plugin_data *p = p_d;
- size_t conns_by_ip = 0;
- size_t j;
-
- if (con->uri.path->used == 0) return HANDLER_GO_ON;
-
- mod_evasive_patch_connection(srv, con, p);
-
- /* no limit set, nothing to block */
- if (p->conf.max_conns == 0) return HANDLER_GO_ON;
-
- switch (con->dst_addr.plain.sa_family) {
- case AF_INET:
-#ifdef HAVE_IPV6
- case AF_INET6:
-#endif
- break;
- default: // Address family not supported
- return HANDLER_GO_ON;
- };
-
- for (j = 0; j < srv->conns->used; j++) {
- connection *c = srv->conns->ptr[j];
-
- /* check if other connections are already actively serving data for the same IP
- * we can only ban connections which are already behind the 'read request' state
- * */
- if (c->dst_addr.plain.sa_family != con->dst_addr.plain.sa_family) continue;
- if (c->state <= CON_STATE_HANDLE_REQUEST_HEADER) continue;
-
- switch (con->dst_addr.plain.sa_family) {
- case AF_INET:
- if (c->dst_addr.ipv4.sin_addr.s_addr != con->dst_addr.ipv4.sin_addr.s_addr) continue;
- break;
-#ifdef HAVE_IPV6
- case AF_INET6:
- if (0 != memcmp(c->dst_addr.ipv6.sin6_addr.s6_addr, con->dst_addr.ipv6.sin6_addr.s6_addr, 16)) continue;
- break;
-#endif
- default: // Address family not supported, should never be reached
- continue;
- };
- conns_by_ip++;
-
- if (conns_by_ip > p->conf.max_conns) {
- log_error_write(srv, __FILE__, __LINE__, "ss",
- inet_ntop_cache_get_ip(srv, &(con->dst_addr)),
- "turned away. Too many connections.");
-
- con->http_status = 403;
- return HANDLER_FINISHED;
- }
- }
-
- return HANDLER_GO_ON;
-}
-
-
-LI_EXPORT int mod_evasive_plugin_init(plugin *p);
-LI_EXPORT int mod_evasive_plugin_init(plugin *p) {
- p->version = LIGHTTPD_VERSION_ID;
- p->name = buffer_init_string("evasive");
-
- p->init = mod_evasive_init;
- p->set_defaults = mod_evasive_set_defaults;
- p->handle_uri_clean = mod_evasive_uri_handler;
- p->cleanup = mod_evasive_free;
-
- p->data = NULL;
-
- return 0;
-}