unrealircd

- supernets unrealircd source & configuration
git clone git://git.acid.vegas/unrealircd.git
spamfilter.c (8128B)
      1 /* spamfilter.* RPC calls
      2  * (C) Copyright 2022-.. Bram Matthys (Syzop) and the UnrealIRCd team
      3  * License: GPLv2 or later
      4  */
      5 
      6 #include "unrealircd.h"
      7 
      8 ModuleHeader MOD_HEADER
      9 = {
     10 	"rpc/spamfilter",
     11 	"1.0.3",
     12 	"spamfilter.* RPC calls",
     13 	"UnrealIRCd Team",
     14 	"unrealircd-6",
     15 };
     16 
     17 /* Forward declarations */
     18 RPC_CALL_FUNC(rpc_spamfilter_list);
     19 RPC_CALL_FUNC(rpc_spamfilter_get);
     20 RPC_CALL_FUNC(rpc_spamfilter_del);
     21 RPC_CALL_FUNC(rpc_spamfilter_add);
     22 
     23 MOD_INIT()
     24 {
     25 	RPCHandlerInfo r;
     26 
     27 	MARK_AS_OFFICIAL_MODULE(modinfo);
     28 
     29 	memset(&r, 0, sizeof(r));
     30 	r.method = "spamfilter.list";
     31 	r.loglevel = ULOG_DEBUG;
     32 	r.call = rpc_spamfilter_list;
     33 	if (!RPCHandlerAdd(modinfo->handle, &r))
     34 	{
     35 		config_error("[rpc/spamfilter] Could not register RPC handler");
     36 		return MOD_FAILED;
     37 	}
     38 	r.method = "spamfilter.get";
     39 	r.loglevel = ULOG_DEBUG;
     40 	r.call = rpc_spamfilter_get;
     41 	if (!RPCHandlerAdd(modinfo->handle, &r))
     42 	{
     43 		config_error("[rpc/spamfilter] Could not register RPC handler");
     44 		return MOD_FAILED;
     45 	}
     46 	r.method = "spamfilter.del";
     47 	r.call = rpc_spamfilter_del;
     48 	if (!RPCHandlerAdd(modinfo->handle, &r))
     49 	{
     50 		config_error("[rpc/spamfilter] Could not register RPC handler");
     51 		return MOD_FAILED;
     52 	}
     53 	r.method = "spamfilter.add";
     54 	r.call = rpc_spamfilter_add;
     55 	if (!RPCHandlerAdd(modinfo->handle, &r))
     56 	{
     57 		config_error("[rpc/spamfilter] Could not register RPC handler");
     58 		return MOD_FAILED;
     59 	}
     60 
     61 	return MOD_SUCCESS;
     62 }
     63 
     64 MOD_LOAD()
     65 {
     66 	return MOD_SUCCESS;
     67 }
     68 
     69 MOD_UNLOAD()
     70 {
     71 	return MOD_SUCCESS;
     72 }
     73 
     74 RPC_CALL_FUNC(rpc_spamfilter_list)
     75 {
     76 	json_t *result, *list, *item;
     77 	int index;
     78 	TKL *tkl;
     79 
     80 	result = json_object();
     81 	list = json_array();
     82 	json_object_set_new(result, "list", list);
     83 
     84 	for (index = 0; index < TKLISTLEN; index++)
     85 	{
     86 		for (tkl = tklines[index]; tkl; tkl = tkl->next)
     87 		{
     88 			if (TKLIsSpamfilter(tkl))
     89 			{
     90 				item = json_object();
     91 				json_expand_tkl(item, NULL, tkl, 1);
     92 				json_array_append_new(list, item);
     93 			}
     94 		}
     95 	}
     96 
     97 	rpc_response(client, request, result);
     98 	json_decref(result);
     99 }
    100 
    101 /* Shared code for selecting a spamfilter, for .add/.del/get */
    102 int spamfilter_select_criteria(Client *client, json_t *request, json_t *params, const char **name, int *match_type,
    103                                int *targets, char *targetbuf, size_t targetbuflen, BanAction *action, char *actionbuf)
    104 {
    105 	const char *str;
    106 
    107 	*name = json_object_get_string(params, "name");
    108 	if (!*name)
    109 	{
    110 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Missing parameter: 'name'");
    111 		return 0;
    112 	}
    113 
    114 	str = json_object_get_string(params, "match_type");
    115 	if (!str)
    116 	{
    117 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Missing parameter: 'match_type'");
    118 		return 0;
    119 	}
    120 	*match_type = unreal_match_method_strtoval(str);
    121 	if (!*match_type)
    122 	{
    123 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Invalid value for parameter 'match_type'");
    124 		return 0;
    125 	}
    126 
    127 	str = json_object_get_string(params, "spamfilter_targets");
    128 	if (!str)
    129 	{
    130 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Missing parameter: 'spamfilter_targets'");
    131 		return 0;
    132 	}
    133 	*targets = spamfilter_gettargets(str, NULL);
    134 	if (!*targets)
    135 	{
    136 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Invalid value(s) for parameter 'spamfilter_targets'");
    137 		return 0;
    138 	}
    139 	strlcpy(targetbuf, spamfilter_target_inttostring(*targets), targetbuflen);
    140 
    141 	str = json_object_get_string(params, "ban_action");
    142 	if (!str)
    143 	{
    144 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Missing parameter: 'ban_action'");
    145 		return 0;
    146 	}
    147 	*action = banact_stringtoval(str);
    148 	if (!*action)
    149 	{
    150 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Invalid value for parameter 'ban_action'");
    151 		return 0;
    152 	}
    153 	actionbuf[0] = banact_valtochar(*action);
    154 	actionbuf[1] = '\0';
    155 	return 1;
    156 }
    157 
    158 RPC_CALL_FUNC(rpc_spamfilter_get)
    159 {
    160 	json_t *result;
    161 	int type = TKL_SPAMF|TKL_GLOBAL;
    162 	const char *name;
    163 	TKL *tkl;
    164 	BanAction action;
    165 	int match_type = 0;
    166 	int targets = 0;
    167 	char targetbuf[64];
    168 	char actionbuf[2];
    169 
    170 	if (!spamfilter_select_criteria(client, request, params, &name, &match_type, &targets, targetbuf, sizeof(targetbuf), &action, actionbuf))
    171 		return; /* Error already communicated to client */
    172 
    173 	tkl = find_tkl_spamfilter(type, name, action, targets);
    174 	if (!tkl)
    175 	{
    176 		rpc_error(client, request, JSON_RPC_ERROR_NOT_FOUND, "Spamfilter not found");
    177 		return;
    178 	}
    179 
    180 	result = json_object();
    181 	json_expand_tkl(result, "tkl", tkl, 1);
    182 	rpc_response(client, request, result);
    183 	json_decref(result);
    184 }
    185 
    186 RPC_CALL_FUNC(rpc_spamfilter_add)
    187 {
    188 	json_t *result;
    189 	int type = TKL_SPAMF|TKL_GLOBAL;
    190 	const char *str;
    191 	const char *name, *reason;
    192 	const char *set_by;
    193 	time_t ban_duration = 0;
    194 	TKL *tkl;
    195 	Match *m;
    196 	BanAction action;
    197 	int match_type = 0;
    198 	int targets = 0;
    199 	char targetbuf[64];
    200 	char actionbuf[2];
    201 	char reasonbuf[512];
    202 	char *err = NULL;
    203 
    204 	if (!spamfilter_select_criteria(client, request, params, &name, &match_type, &targets, targetbuf, sizeof(targetbuf), &action, actionbuf))
    205 		return; /* Error already communicated to client */
    206 
    207 	/* Reason */
    208 	reason = json_object_get_string(params, "reason");
    209 	if (!reason)
    210 	{
    211 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Missing parameter: 'reason'");
    212 		return;
    213 	}
    214 
    215 	/* Ban duration */
    216 	if ((str = json_object_get_string(params, "ban_duration")))
    217 	{
    218 		ban_duration = config_checkval(str, CFG_TIME);
    219 		if (ban_duration < 0)
    220 		{
    221 			rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Invalid value for parameter 'ban_duration'");
    222 			return;
    223 		}
    224 	}
    225 
    226 	OPTIONAL_PARAM_STRING("set_by", set_by);
    227 	if (!set_by)
    228 		set_by = client->name;
    229 
    230 	if (find_tkl_spamfilter(type, name, action, targets))
    231 	{
    232 		rpc_error(client, request, JSON_RPC_ERROR_ALREADY_EXISTS, "A spamfilter with that regex+action+target already exists");
    233 		return;
    234 	}
    235 
    236 	/* Convert reason to use internal storage and wire format */
    237 	reason = unreal_encodespace(reason);
    238 	strlcpy(reasonbuf, reason, sizeof(reasonbuf));
    239 	reason = reasonbuf;
    240 
    241 	/* now check the regex / match field (only when adding) */
    242 	m = unreal_create_match(match_type, name, &err);
    243 	if (!m)
    244 	{
    245 		rpc_error(client, request, JSON_RPC_ERROR_INVALID_PARAMS, "Invalid regex or match string specified");
    246 		return;
    247 	}
    248 
    249 	tkl = tkl_add_spamfilter(type, targets, action, m, set_by, 0, TStime(),
    250 	                         ban_duration, reason, 0);
    251 
    252 	if (!tkl)
    253 	{
    254 		rpc_error(client, request, JSON_RPC_ERROR_INTERNAL_ERROR, "Unable to add item");
    255 		return;
    256 	}
    257 
    258 	tkl_added(client, tkl);
    259 
    260 	result = json_object();
    261 	json_expand_tkl(result, "tkl", tkl, 1);
    262 	rpc_response(client, request, result);
    263 	json_decref(result);
    264 }
    265 
    266 RPC_CALL_FUNC(rpc_spamfilter_del)
    267 {
    268 	json_t *result;
    269 	int type = TKL_SPAMF|TKL_GLOBAL;
    270 	const char *name;
    271 	const char *set_by;
    272 	TKL *tkl;
    273 	BanAction action;
    274 	int match_type = 0;
    275 	int targets = 0;
    276 	char targetbuf[64];
    277 	char actionbuf[2];
    278 	const char *tkllayer[13];
    279 
    280 	if (!spamfilter_select_criteria(client, request, params, &name, &match_type, &targets, targetbuf, sizeof(targetbuf), &action, actionbuf))
    281 		return; /* Error already communicated to client */
    282 
    283 	OPTIONAL_PARAM_STRING("set_by", set_by);
    284 	if (!set_by)
    285 		set_by = client->name;
    286 
    287 	tkl = find_tkl_spamfilter(type, name, action, targets);
    288 	if (!tkl)
    289 	{
    290 		rpc_error(client, request, JSON_RPC_ERROR_NOT_FOUND, "Spamfilter not found");
    291 		return;
    292 	}
    293 
    294 	result = json_object();
    295 	json_expand_tkl(result, "tkl", tkl, 1);
    296 
    297 	/* Wait.. this is a bit dull? */
    298 	tkllayer[1] = "-";
    299 	tkllayer[2] = "F";
    300 	tkllayer[3] = targetbuf;
    301 	tkllayer[4] = actionbuf;
    302 	tkllayer[5] = set_by;
    303 	tkllayer[6] = "-";
    304 	tkllayer[7] = "0";
    305 	tkllayer[8] = "0";
    306 	tkllayer[9] = "-";
    307 	tkllayer[10] = unreal_match_method_valtostr(match_type);
    308 	tkllayer[11] = name;
    309 	tkllayer[12] = NULL;
    310 
    311 	cmd_tkl(&me, NULL, 12, tkllayer);
    312 
    313 	tkl = find_tkl_spamfilter(type, name, action, targets);
    314 	if (!tkl)
    315 	{
    316 		rpc_response(client, request, result);
    317 	} else {
    318 		/* Spamfilter still exists so failure to remove.
    319 		 * Actually this may not be an internal error, it could be an
    320 		 * incorrect request, such as asking to remove a config-based spamfilter.
    321 		 */
    322 		rpc_error(client, request, JSON_RPC_ERROR_INTERNAL_ERROR, "Unable to remove item");
    323 		return;
    324 	}
    325 	json_decref(result);
    326 }