File size: 7,988 Bytes
b35e045 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | #include "redismodule.h"
#include <strings.h>
int mutable_bool_val;
int immutable_bool_val;
long long longval;
long long memval;
RedisModuleString *strval = NULL;
int enumval;
int flagsval;
/* Series of get and set callbacks for each type of config, these rely on the privdata ptr
* to point to the config, and they register the configs as such. Note that one could also just
* use names if they wanted, and store anything in privdata. */
int getBoolConfigCommand(const char *name, void *privdata) {
REDISMODULE_NOT_USED(name);
return (*(int *)privdata);
}
int setBoolConfigCommand(const char *name, int new, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(err);
*(int *)privdata = new;
return REDISMODULE_OK;
}
long long getNumericConfigCommand(const char *name, void *privdata) {
REDISMODULE_NOT_USED(name);
return (*(long long *) privdata);
}
int setNumericConfigCommand(const char *name, long long new, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(err);
*(long long *)privdata = new;
return REDISMODULE_OK;
}
RedisModuleString *getStringConfigCommand(const char *name, void *privdata) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(privdata);
return strval;
}
int setStringConfigCommand(const char *name, RedisModuleString *new, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(err);
REDISMODULE_NOT_USED(privdata);
size_t len;
if (!strcasecmp(RedisModule_StringPtrLen(new, &len), "rejectisfreed")) {
*err = RedisModule_CreateString(NULL, "Cannot set string to 'rejectisfreed'", 36);
return REDISMODULE_ERR;
}
if (strval) RedisModule_FreeString(NULL, strval);
RedisModule_RetainString(NULL, new);
strval = new;
return REDISMODULE_OK;
}
int getEnumConfigCommand(const char *name, void *privdata) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(privdata);
return enumval;
}
int setEnumConfigCommand(const char *name, int val, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(err);
REDISMODULE_NOT_USED(privdata);
enumval = val;
return REDISMODULE_OK;
}
int getFlagsConfigCommand(const char *name, void *privdata) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(privdata);
return flagsval;
}
int setFlagsConfigCommand(const char *name, int val, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(name);
REDISMODULE_NOT_USED(err);
REDISMODULE_NOT_USED(privdata);
flagsval = val;
return REDISMODULE_OK;
}
int boolApplyFunc(RedisModuleCtx *ctx, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(privdata);
if (mutable_bool_val && immutable_bool_val) {
*err = RedisModule_CreateString(NULL, "Bool configs cannot both be yes.", 32);
return REDISMODULE_ERR;
}
return REDISMODULE_OK;
}
int longlongApplyFunc(RedisModuleCtx *ctx, void *privdata, RedisModuleString **err) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(privdata);
if (longval == memval) {
*err = RedisModule_CreateString(NULL, "These configs cannot equal each other.", 38);
return REDISMODULE_ERR;
}
return REDISMODULE_OK;
}
int registerBlockCheck(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
int response_ok = 0;
int result = RedisModule_RegisterBoolConfig(ctx, "mutable_bool", 1, REDISMODULE_CONFIG_DEFAULT, getBoolConfigCommand, setBoolConfigCommand, boolApplyFunc, &mutable_bool_val);
response_ok |= (result == REDISMODULE_OK);
result = RedisModule_RegisterStringConfig(ctx, "string", "secret password", REDISMODULE_CONFIG_DEFAULT, getStringConfigCommand, setStringConfigCommand, NULL, NULL);
response_ok |= (result == REDISMODULE_OK);
const char *enum_vals[] = {"none", "five", "one", "two", "four"};
const int int_vals[] = {0, 5, 1, 2, 4};
result = RedisModule_RegisterEnumConfig(ctx, "enum", 1, REDISMODULE_CONFIG_DEFAULT, enum_vals, int_vals, 5, getEnumConfigCommand, setEnumConfigCommand, NULL, NULL);
response_ok |= (result == REDISMODULE_OK);
result = RedisModule_RegisterNumericConfig(ctx, "numeric", -1, REDISMODULE_CONFIG_DEFAULT, -5, 2000, getNumericConfigCommand, setNumericConfigCommand, longlongApplyFunc, &longval);
response_ok |= (result == REDISMODULE_OK);
result = RedisModule_LoadConfigs(ctx);
response_ok |= (result == REDISMODULE_OK);
/* This validates that it's not possible to register/load configs outside OnLoad,
* thus returns an error if they succeed. */
if (response_ok) {
RedisModule_ReplyWithError(ctx, "UNEXPECTEDOK");
} else {
RedisModule_ReplyWithSimpleString(ctx, "OK");
}
return REDISMODULE_OK;
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx, "moduleconfigs", 1, REDISMODULE_APIVER_1) == REDISMODULE_ERR) return REDISMODULE_ERR;
if (RedisModule_RegisterBoolConfig(ctx, "mutable_bool", 1, REDISMODULE_CONFIG_DEFAULT, getBoolConfigCommand, setBoolConfigCommand, boolApplyFunc, &mutable_bool_val) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
/* Immutable config here. */
if (RedisModule_RegisterBoolConfig(ctx, "immutable_bool", 0, REDISMODULE_CONFIG_IMMUTABLE, getBoolConfigCommand, setBoolConfigCommand, boolApplyFunc, &immutable_bool_val) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_RegisterStringConfig(ctx, "string", "secret password", REDISMODULE_CONFIG_DEFAULT, getStringConfigCommand, setStringConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
/* On the stack to make sure we're copying them. */
const char *enum_vals[] = {"none", "five", "one", "two", "four"};
const int int_vals[] = {0, 5, 1, 2, 4};
if (RedisModule_RegisterEnumConfig(ctx, "enum", 1, REDISMODULE_CONFIG_DEFAULT, enum_vals, int_vals, 5, getEnumConfigCommand, setEnumConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_RegisterEnumConfig(ctx, "flags", 3, REDISMODULE_CONFIG_DEFAULT | REDISMODULE_CONFIG_BITFLAGS, enum_vals, int_vals, 5, getFlagsConfigCommand, setFlagsConfigCommand, NULL, NULL) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
/* Memory config here. */
if (RedisModule_RegisterNumericConfig(ctx, "memory_numeric", 1024, REDISMODULE_CONFIG_DEFAULT | REDISMODULE_CONFIG_MEMORY, 0, 3000000, getNumericConfigCommand, setNumericConfigCommand, longlongApplyFunc, &memval) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
if (RedisModule_RegisterNumericConfig(ctx, "numeric", -1, REDISMODULE_CONFIG_DEFAULT, -5, 2000, getNumericConfigCommand, setNumericConfigCommand, longlongApplyFunc, &longval) == REDISMODULE_ERR) {
return REDISMODULE_ERR;
}
size_t len;
if (argc && !strcasecmp(RedisModule_StringPtrLen(argv[0], &len), "noload")) {
return REDISMODULE_OK;
} else if (RedisModule_LoadConfigs(ctx) == REDISMODULE_ERR) {
if (strval) {
RedisModule_FreeString(ctx, strval);
strval = NULL;
}
return REDISMODULE_ERR;
}
/* Creates a command which registers configs outside OnLoad() function. */
if (RedisModule_CreateCommand(ctx,"block.register.configs.outside.onload", registerBlockCheck, "write", 0, 0, 0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
int RedisModule_OnUnload(RedisModuleCtx *ctx) {
REDISMODULE_NOT_USED(ctx);
if (strval) {
RedisModule_FreeString(ctx, strval);
strval = NULL;
}
return REDISMODULE_OK;
}
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