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174 lines
3.6 KiB
174 lines
3.6 KiB
/* Copyright 2017 Alex 'AdUser' Z (ad_user@runbox.com) |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#include <assert.h> |
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#include <stdbool.h> |
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#include <stdint.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <libipset/session.h> |
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#include <libipset/types.h> |
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#include <libipset/ui.h> |
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#include "../strlcpy.h" |
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#include "backend.h" |
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#define MODNAME "ipset" |
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struct _config { |
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char name[ID_MAX + 1]; |
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void (*logcb)(enum loglevel lvl, const char *msg); |
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struct ipset_session *sess; |
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int flags; |
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bool shared; |
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}; |
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#include "backend.c" |
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inline static bool |
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my_ipset_error(cfg_t *cfg, const char *func) { |
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struct ipset_data *data = NULL; |
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if (ipset_session_error(cfg->sess)) { |
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log_msg(cfg, error, "%s: %s", func, ipset_session_error(cfg->sess)); |
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} else /* IPSET_WARNING */ { |
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log_msg(cfg, warn, "%s: %s", func, ipset_session_warning(cfg->sess)); |
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} |
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ipset_session_report_reset(cfg->sess); |
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if ((data = ipset_session_data(cfg->sess)) != NULL) |
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ipset_data_reset(data); |
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return false; |
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} |
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static bool |
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my_ipset_cmd(cfg_t *cfg, enum ipset_cmd cmd, const char *ip) { |
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const struct ipset_type *type = NULL; |
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if (ipset_parse_setname(cfg->sess, IPSET_SETNAME, cfg->name) < 0) |
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return my_ipset_error(cfg, "ipset_parse_setname())"); |
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if ((type = ipset_type_get(cfg->sess, cmd)) == NULL) |
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return my_ipset_error(cfg, "ipset_type_get()"); |
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if (ipset_parse_elem(cfg->sess, type->last_elem_optional, ip) < 0) |
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return my_ipset_error(cfg, "ipset_parse_elem()"); |
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if (ipset_cmd(cfg->sess, cmd, 0) < 0) { |
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if (cmd == IPSET_CMD_TEST && ipset_session_error(cfg->sess) == NULL) |
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return false; /* "ip is NOT in list" */ |
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return my_ipset_error(cfg, "ipset_cmd()"); |
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} |
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return true; |
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} |
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cfg_t * |
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create(const char *id) { |
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cfg_t *cfg = NULL; |
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assert(id != NULL); |
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if ((cfg = calloc(1, sizeof(cfg_t))) == NULL) |
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return NULL; |
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strlcpy(cfg->name, id, sizeof(cfg->name)); |
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cfg->logcb = &logcb_stub; |
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cfg->flags |= MOD_IS_READY; |
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cfg->flags |= MOD_TYPE_BACKEND; |
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return cfg; |
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} |
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bool |
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config(cfg_t *cfg, const char *key, const char *value) { |
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assert(cfg != NULL); |
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assert(key != NULL); |
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assert(value != NULL); |
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(void)(cfg); |
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(void)(key); |
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(void)(value); |
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return false; |
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} |
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bool |
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start(cfg_t *cfg) { |
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assert(cfg != NULL); |
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if (cfg->shared && usage_inc(cfg->name) > 1) |
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return true; |
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ipset_load_types(); |
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if ((cfg->sess = ipset_session_init(NULL)) == NULL) { |
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log_msg(cfg, error, "can't init ipset session"); |
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return false; |
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} |
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if (ipset_session_output(cfg->sess, IPSET_LIST_NONE) < 0) |
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return my_ipset_error(cfg, "ipset_session_output()"); |
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if (ipset_envopt_parse(cfg->sess, IPSET_ENV_EXIST, NULL) < 0) |
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return my_ipset_error(cfg, "ipset_envopt_parse()"); |
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return true; |
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} |
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bool |
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stop(cfg_t *cfg) { |
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assert(cfg != NULL); |
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if (cfg->shared && usage_dec(cfg->name) > 0) |
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return true; |
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if (cfg->sess) { |
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ipset_session_fini(cfg->sess); |
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cfg->sess = NULL; |
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} |
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return true; |
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} |
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bool |
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ban(cfg_t *cfg, const char *ip) { |
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assert(cfg != NULL); |
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return my_ipset_cmd(cfg, IPSET_CMD_ADD, ip); |
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} |
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bool |
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unban(cfg_t *cfg, const char *ip) { |
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assert(cfg != NULL); |
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return my_ipset_cmd(cfg, IPSET_CMD_DEL, ip); |
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} |
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bool |
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check(cfg_t *cfg, const char *ip) { |
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assert(cfg != NULL); |
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return my_ipset_cmd(cfg, IPSET_CMD_TEST, ip); |
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} |
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bool |
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ping(cfg_t *cfg) { |
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assert(cfg != NULL); |
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(void)(cfg); /* silence warning about unused variable */ |
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return true; |
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} |
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void |
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destroy(cfg_t *cfg) { |
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assert(cfg != NULL); |
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free(cfg); |
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}
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