/
library.c
4564 lines (3859 loc) · 134 KB
/
library.c
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#include "php_redis.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "common.h"
#include "php_network.h"
#include <sys/types.h>
#ifdef HAVE_REDIS_IGBINARY
#include "igbinary/igbinary.h"
#endif
#ifdef HAVE_REDIS_MSGPACK
#include "msgpack/php_msgpack.h"
#endif
#ifdef HAVE_REDIS_LZF
#include <lzf.h>
#ifndef LZF_MARGIN
#define LZF_MARGIN 128
#endif
#endif
#ifdef HAVE_REDIS_ZSTD
#include <zstd.h>
#endif
#ifdef HAVE_REDIS_LZ4
#include <lz4.h>
#include <lz4hc.h>
/* uint8_t crf + int length */
#define REDIS_LZ4_HDR_SIZE (sizeof(uint8_t) + sizeof(int))
#if defined(LZ4HC_CLEVEL_MAX)
/* version >= 1.7.5 */
#define REDIS_LZ4_MAX_CLEVEL LZ4HC_CLEVEL_MAX
#elif defined (LZ4HC_MAX_CLEVEL)
/* version >= 1.7.3 */
#define REDIS_LZ4_MAX_CLEVEL LZ4HC_MAX_CLEVEL
#else
/* older versions */
#define REDIS_LZ4_MAX_CLEVEL 12
#endif
#endif
#include <zend_exceptions.h>
#include "php_redis.h"
#include "library.h"
#include "redis_commands.h"
#ifdef HAVE_REDIS_JSON
#include <ext/json/php_json.h>
#endif
#include <ext/hash/php_hash.h>
#if PHP_VERSION_ID < 80400
#include <ext/standard/php_rand.h>
#else
#include <ext/random/php_random.h>
#endif
#define UNSERIALIZE_NONE 0
#define UNSERIALIZE_KEYS 1
#define UNSERIALIZE_VALS 2
#define UNSERIALIZE_ALL 3
#define SCORE_DECODE_NONE 0
#define SCORE_DECODE_INT 1
#define SCORE_DECODE_DOUBLE 2
/* PhpRedis often returns either FALSE or NULL depending on whether we have
* an option set, so this macro just wraps that often repeated logic */
#define REDIS_ZVAL_NULL(sock_, zv_) \
do { \
if ((sock_)->null_mbulk_as_null) { \
ZVAL_NULL((zv_)); \
} else { \
ZVAL_FALSE((zv_)); \
} \
} while (0)
#ifndef PHP_WIN32
#include <netinet/tcp.h> /* TCP_NODELAY */
#include <sys/socket.h> /* SO_KEEPALIVE */
#else
#include <winsock.h>
#endif
extern zend_class_entry *redis_ce;
extern zend_class_entry *redis_exception_ce;
extern int le_redis_pconnect;
static int redis_mbulk_reply_zipped_raw_variant(RedisSock *redis_sock, zval *zret, int count);
/* Register a persistent resource in a a way that works for every PHP 7 version. */
void redis_register_persistent_resource(zend_string *id, void *ptr, int le_id) {
#if PHP_VERSION_ID < 70300
zend_resource res;
res.type = le_id;
res.ptr = ptr;
zend_hash_str_update_mem(&EG(persistent_list), ZSTR_VAL(id), ZSTR_LEN(id), &res, sizeof(res));
#else
zend_register_persistent_resource(ZSTR_VAL(id), ZSTR_LEN(id), ptr, le_id);
#endif
}
static ConnectionPool *
redis_sock_get_connection_pool(RedisSock *redis_sock)
{
ConnectionPool *pool;
zend_resource *le;
zend_string *persistent_id;
/* Generate our unique pool id depending on configuration */
persistent_id = redis_pool_spprintf(redis_sock, INI_STR("redis.pconnect.pool_pattern"));
/* Return early if we can find the pool */
if ((le = zend_hash_find_ptr(&EG(persistent_list), persistent_id))) {
zend_string_release(persistent_id);
return le->ptr;
}
/* Create the pool and store it in our persistent list */
pool = pecalloc(1, sizeof(*pool), 1);
zend_llist_init(&pool->list, sizeof(php_stream *), NULL, 1);
redis_register_persistent_resource(persistent_id, pool, le_redis_pconnect);
zend_string_release(persistent_id);
return pool;
}
/* Helper to reselect the proper DB number when we reconnect */
static int reselect_db(RedisSock *redis_sock) {
char *cmd, *response;
int cmd_len, response_len;
cmd_len = redis_spprintf(redis_sock, NULL, &cmd, "SELECT", "d",
redis_sock->dbNumber);
if (redis_sock_write(redis_sock, cmd, cmd_len) < 0) {
efree(cmd);
return -1;
}
efree(cmd);
if ((response = redis_sock_read(redis_sock, &response_len)) == NULL) {
return -1;
}
if (strncmp(response, "+OK", 3)) {
efree(response);
return -1;
}
efree(response);
return 0;
}
/* Append an AUTH command to a smart string if necessary. This will either
* append the new style AUTH <user> <password>, old style AUTH <password>, or
* append no command at all. Function returns 1 if we appended a command
* and 0 otherwise. */
static int redis_sock_append_auth(RedisSock *redis_sock, smart_string *str) {
/* We need a password at least */
if (redis_sock->pass == NULL)
return 0;
REDIS_CMD_INIT_SSTR_STATIC(str, !!redis_sock->user + !!redis_sock->pass, "AUTH");
if (redis_sock->user)
redis_cmd_append_sstr_zstr(str, redis_sock->user);
redis_cmd_append_sstr_zstr(str, redis_sock->pass);
/* We appended a command */
return 1;
}
PHP_REDIS_API void
redis_sock_set_auth(RedisSock *redis_sock, zend_string *user, zend_string *pass)
{
/* Release existing user/pass */
redis_sock_free_auth(redis_sock);
/* Set new user/pass */
redis_sock->user = user ? zend_string_copy(user) : NULL;
redis_sock->pass = pass ? zend_string_copy(pass) : NULL;
}
PHP_REDIS_API void
redis_sock_set_auth_zval(RedisSock *redis_sock, zval *zv) {
zend_string *user, *pass;
if (redis_extract_auth_info(zv, &user, &pass) == FAILURE)
return;
redis_sock_set_auth(redis_sock, user, pass);
if (user) zend_string_release(user);
if (pass) zend_string_release(pass);
}
PHP_REDIS_API void
redis_sock_free_auth(RedisSock *redis_sock) {
if (redis_sock->user) {
zend_string_release(redis_sock->user);
redis_sock->user = NULL;
}
if (redis_sock->pass) {
zend_string_release(redis_sock->pass);
redis_sock->pass = NULL;
}
}
PHP_REDIS_API char *
redis_sock_auth_cmd(RedisSock *redis_sock, int *cmdlen) {
char *cmd;
/* AUTH requires at least a password */
if (redis_sock->pass == NULL)
return NULL;
if (redis_sock->user) {
*cmdlen = redis_spprintf(redis_sock, NULL, &cmd, "AUTH", "SS", redis_sock->user, redis_sock->pass);
} else {
*cmdlen = redis_spprintf(redis_sock, NULL, &cmd, "AUTH", "S", redis_sock->pass);
}
return cmd;
}
/* Send Redis AUTH and process response */
PHP_REDIS_API int redis_sock_auth(RedisSock *redis_sock) {
char *cmd, inbuf[4096];
int cmdlen;
size_t len;
if ((cmd = redis_sock_auth_cmd(redis_sock, &cmdlen)) == NULL)
return SUCCESS;
if (redis_sock_write(redis_sock, cmd, cmdlen) < 0) {
efree(cmd);
return FAILURE;
}
efree(cmd);
if (redis_sock_gets(redis_sock, inbuf, sizeof(inbuf) - 1, &len) < 0 || strncmp(inbuf, "+OK", 3)) {
return FAILURE;
}
return SUCCESS;
}
/* Helper function and macro to test a RedisSock error prefix. */
#define REDIS_SOCK_ERRCMP_STATIC(rs, s) redis_sock_errcmp(rs, s, sizeof(s)-1)
static int redis_sock_errcmp(RedisSock *redis_sock, const char *err, size_t errlen) {
return ZSTR_LEN(redis_sock->err) >= errlen &&
memcmp(ZSTR_VAL(redis_sock->err), err, errlen) == 0;
}
/* Helper function that will throw an exception for a small number of ERR codes
* returned by Redis. Typically we just return FALSE to the caller in the event
* of an ERROR reply, but for the following error types:
* 1) MASTERDOWN
* 2) AUTH
* 3) LOADING
*/
static void
redis_error_throw(RedisSock *redis_sock)
{
/* Short circuit if we have no redis_sock or any error */
if (redis_sock == NULL || redis_sock->err == NULL)
return;
/* Redis 6 decided to add 'ERR AUTH' which has a normal 'ERR' prefix
* but is actually an authentication error that we will want to throw
* an exception for, so just short circuit if this is any other 'ERR'
* prefixed error. */
if (REDIS_SOCK_ERRCMP_STATIC(redis_sock, "ERR") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "ERR AUTH")) return;
/* We may want to flip this logic and check for MASTERDOWN, AUTH,
* and LOADING but that may have side effects (esp for things like
* Disque) */
if (!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "NOSCRIPT") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "NOQUORUM") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "NOGOODSLAVE") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "WRONGTYPE") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "BUSYGROUP") &&
!REDIS_SOCK_ERRCMP_STATIC(redis_sock, "NOGROUP"))
{
REDIS_THROW_EXCEPTION(ZSTR_VAL(redis_sock->err), 0);
}
}
static int
read_mbulk_header(RedisSock *redis_sock, int *nelem)
{
char line[4096];
size_t len;
/* Throws exception on failure */
if (redis_sock_gets(redis_sock, line, sizeof(line) - 1, &len) < 0) {
return FAILURE;
}
if (*line != TYPE_MULTIBULK) {
if (*line == TYPE_ERR) {
redis_sock_set_err(redis_sock, line + 1, len - 1);
}
return FAILURE;
}
*nelem = atoi(line + 1);
return SUCCESS;
}
PHP_REDIS_API int
redis_check_eof(RedisSock *redis_sock, zend_bool no_retry, zend_bool no_throw)
{
unsigned int retry_index;
char *errmsg;
if (!redis_sock || !redis_sock->stream || redis_sock->status == REDIS_SOCK_STATUS_FAILED) {
if (!no_throw) {
REDIS_THROW_EXCEPTION( "Connection closed", 0);
}
return -1;
}
/* NOITCE: set errno = 0 here
*
* There is a bug in php socket stream to check liveness of a connection:
* if (0 >= recv(sock->socket, &buf, sizeof(buf), MSG_PEEK) && php_socket_errno() != EWOULDBLOCK) {
* alive = 0;
* }
* If last errno is EWOULDBLOCK and recv returns 0 because of connection closed, alive would not be
* set to 0. However, the connection is close indeed. The php_stream_eof is not reliable. This will
* cause a "read error on connection" exception when use a closed persistent connection.
*
* We work around this by set errno = 0 first.
*
* Bug fix of php: https://github.com/php/php-src/pull/1456
* */
errno = 0;
if (php_stream_eof(redis_sock->stream) == 0) {
/* Success */
return 0;
} else if (redis_sock->mode == MULTI || redis_sock->watching) {
errmsg = "Connection lost and socket is in MULTI/watching mode";
} else {
errmsg = "Connection lost";
redis_backoff_reset(&redis_sock->backoff);
for (retry_index = 0; !no_retry && retry_index < redis_sock->max_retries; ++retry_index) {
/* close existing stream before reconnecting */
if (redis_sock->stream) {
/* reconnect no need to reset mode, it will cause pipeline mode socket exception */
redis_sock_disconnect(redis_sock, 1, 0);
}
/* Sleep based on our backoff algorithm */
zend_ulong delay = redis_backoff_compute(&redis_sock->backoff, retry_index);
if (delay != 0)
usleep(delay);
/* reconnect */
if (redis_sock_connect(redis_sock) == 0) {
/* check for EOF again. */
errno = 0;
if (php_stream_eof(redis_sock->stream) == 0) {
if (redis_sock_auth(redis_sock) != SUCCESS) {
errmsg = "AUTH failed while reconnecting";
break;
}
redis_sock->status = REDIS_SOCK_STATUS_AUTHENTICATED;
/* If we're using a non-zero db, reselect it */
if (redis_sock->dbNumber && reselect_db(redis_sock) != 0) {
errmsg = "SELECT failed while reconnecting";
break;
}
redis_sock->status = REDIS_SOCK_STATUS_READY;
/* Success */
return 0;
}
}
}
}
/* close stream and mark socket as failed */
redis_sock_disconnect(redis_sock, 1, 1);
redis_sock->status = REDIS_SOCK_STATUS_FAILED;
if (!no_throw) {
REDIS_THROW_EXCEPTION( errmsg, 0);
}
return -1;
}
PHP_REDIS_API int
redis_sock_read_scan_reply(INTERNAL_FUNCTION_PARAMETERS, RedisSock *redis_sock,
REDIS_SCAN_TYPE type, uint64_t *cursor)
{
REDIS_REPLY_TYPE reply_type;
long reply_info;
char err[4096], *p_iter;
size_t errlen;
/* Our response should have two multibulk replies */
if(redis_read_reply_type(redis_sock, &reply_type, &reply_info)<0
|| reply_type != TYPE_MULTIBULK || reply_info != 2)
{
if (reply_type == TYPE_ERR) {
if (redis_sock_gets(redis_sock, err, sizeof(err), &errlen) == 0) {
redis_sock_set_err(redis_sock, err, errlen);
}
}
return -1;
}
/* The BULK response iterator */
if(redis_read_reply_type(redis_sock, &reply_type, &reply_info)<0
|| reply_type != TYPE_BULK)
{
return -1;
}
/* Attempt to read the iterator */
if(!(p_iter = redis_sock_read_bulk_reply(redis_sock, reply_info))) {
return -1;
}
/* Push the iterator out to the caller */
*cursor = strtoull(p_iter, NULL, 10);
efree(p_iter);
/* Read our actual keys/members/etc differently depending on what kind of
scan command this is. They all come back in slightly different ways */
switch(type) {
case TYPE_SCAN:
return redis_mbulk_reply_raw(INTERNAL_FUNCTION_PARAM_PASSTHRU,
redis_sock, NULL, NULL);
case TYPE_SSCAN:
return redis_sock_read_multibulk_reply(
INTERNAL_FUNCTION_PARAM_PASSTHRU, redis_sock, NULL, NULL);
case TYPE_ZSCAN:
return redis_mbulk_reply_zipped_keys_dbl(INTERNAL_FUNCTION_PARAM_PASSTHRU,
redis_sock, NULL, NULL);
case TYPE_HSCAN:
return redis_mbulk_reply_zipped_vals(INTERNAL_FUNCTION_PARAM_PASSTHRU,
redis_sock, NULL, NULL);
default:
return -1;
}
}
PHP_REDIS_API int
redis_pubsub_response(INTERNAL_FUNCTION_PARAMETERS,
RedisSock *redis_sock, zval *z_tab, void *ctx)
{
if (ctx == NULL) {
return redis_long_response(INTERNAL_FUNCTION_PARAM_PASSTHRU, redis_sock, z_tab, NULL);
} else if (ctx == PHPREDIS_CTX_PTR) {
return redis_read_variant_reply(INTERNAL_FUNCTION_PARAM_PASSTHRU, redis_sock, z_tab, NULL);
} else if (ctx == PHPREDIS_CTX_PTR + 1) {
return redis_mbulk_reply_zipped_keys_int(INTERNAL_FUNCTION_PARAM_PASSTHRU, redis_sock, z_tab, NULL);
} else {
ZEND_ASSERT(!"memory corruption?");
return FAILURE;
}
}
static void
ht_free_subs(zval *data)
{
efree(Z_PTR_P(data));
}
PHP_REDIS_API int redis_subscribe_response(INTERNAL_FUNCTION_PARAMETERS,
RedisSock *redis_sock, zval *z_tab,
void *ctx)
{
HashTable *subs;
subscribeCallback *cb;
subscribeContext *sctx = (subscribeContext*)ctx;
zval *z_tmp, z_resp;
int i;
ALLOC_HASHTABLE(subs);
zend_hash_init(subs, 0, NULL, ht_free_subs, 0);
// Consume response(s) from subscribe, which will vary on argc
while(sctx->argc--) {
ZVAL_NULL(&z_resp);
if (!redis_sock_read_multibulk_reply_zval(redis_sock, &z_resp)) {
goto error;
}
// We'll need to find the command response
if ((z_tmp = zend_hash_index_find(Z_ARRVAL(z_resp), 0)) == NULL) {
goto error;
}
// Make sure the command response matches the command we called
if(strcasecmp(Z_STRVAL_P(z_tmp), sctx->kw) !=0) {
goto error;
}
if ((z_tmp = zend_hash_index_find(Z_ARRVAL(z_resp), 1)) == NULL) {
goto error;
}
zend_hash_str_update_mem(subs, Z_STRVAL_P(z_tmp), Z_STRLEN_P(z_tmp),
&sctx->cb, sizeof(sctx->cb));
zval_dtor(&z_resp);
}
if (strcasecmp(sctx->kw, "ssubscribe") == 0) {
i = REDIS_SSUBSCRIBE_IDX;
} else if (strcasecmp(sctx->kw, "psubscribe") == 0) {
i = REDIS_PSUBSCRIBE_IDX;
} else {
i = REDIS_SUBSCRIBE_IDX;
}
efree(sctx);
if (redis_sock->subs[i]) {
zend_string *zkey;
ZEND_HASH_FOREACH_STR_KEY_PTR(subs, zkey, cb) {
zend_hash_update_mem(redis_sock->subs[i], zkey, cb, sizeof(*cb));
} ZEND_HASH_FOREACH_END();
zend_hash_destroy(subs);
efree(subs);
RETVAL_TRUE;
return SUCCESS;
}
redis_sock->subs[i] = subs;
/* Multibulk response, {[pattern], type, channel, payload } */
while (redis_sock->subs[i]) {
zval z_ret, z_args[4], *z_type, *z_chan, *z_pat = NULL, *z_data;
int tab_idx = 1, is_pmsg = 0;
HashTable *ht_tab;
zend_string *zs;
ZVAL_NULL(&z_resp);
if (!redis_sock_read_multibulk_reply_zval(redis_sock, &z_resp)) {
goto failure;
}
ht_tab = Z_ARRVAL(z_resp);
if ((z_type = zend_hash_index_find(ht_tab, 0)) == NULL ||
Z_TYPE_P(z_type) != IS_STRING
) {
goto failure;
}
// Check for message or pmessage
if (zend_string_equals_literal_ci(Z_STR_P(z_type), "message") ||
zend_string_equals_literal_ci(Z_STR_P(z_type), "pmessage") ||
zend_string_equals_literal_ci(Z_STR_P(z_type), "smessage")
) {
is_pmsg = *Z_STRVAL_P(z_type)=='p';
} else {
zval_dtor(&z_resp);
continue;
}
// Extract pattern if it's a pmessage
if (is_pmsg) {
z_pat = zend_hash_index_find(ht_tab, tab_idx++);
if (z_pat == NULL || Z_TYPE_P(z_pat) != IS_STRING)
goto failure;
}
/* Extract channel */
z_chan = zend_hash_index_find(ht_tab, tab_idx++);
if (z_chan == NULL || Z_TYPE_P(z_chan) != IS_STRING)
goto failure;
/* Finally, extract data */
z_data = zend_hash_index_find(ht_tab, tab_idx++);
if (z_data == NULL)
goto failure;
/* Find our callback, either by channel or pattern string */
zs = z_pat != NULL ? Z_STR_P(z_pat) : Z_STR_P(z_chan);
if ((cb = zend_hash_find_ptr(redis_sock->subs[i], zs)) == NULL)
goto failure;
// Different args for SUBSCRIBE and PSUBSCRIBE
z_args[0] = *getThis();
if(is_pmsg) {
z_args[1] = *z_pat;
z_args[2] = *z_chan;
z_args[3] = *z_data;
} else {
z_args[1] = *z_chan;
z_args[2] = *z_data;
}
// Set arg count
cb->fci.param_count = tab_idx;
cb->fci.retval = &z_ret;
cb->fci.params = z_args;
// Execute callback
if (zend_call_function(&cb->fci, &cb->fci_cache) != SUCCESS) {
goto failure;
}
// If we have a return value free it
zval_ptr_dtor(&z_ret);
zval_dtor(&z_resp);
}
RETVAL_TRUE;
return SUCCESS;
// This is an error state, clean up
error:
efree(sctx);
zend_hash_destroy(subs);
efree(subs);
failure:
zval_dtor(&z_resp);
RETVAL_FALSE;
return FAILURE;
}
PHP_REDIS_API int redis_unsubscribe_response(INTERNAL_FUNCTION_PARAMETERS,
RedisSock *redis_sock, zval *z_tab,
void *ctx)
{
subscribeContext *sctx = (subscribeContext*)ctx;
zval *z_chan, z_ret, z_resp;
int i;
if (strcasecmp(sctx->kw, "sunsubscribe") == 0) {
i = REDIS_SSUBSCRIBE_IDX;
} else if (strcasecmp(sctx->kw, "punsubscribe") == 0) {
i = REDIS_PSUBSCRIBE_IDX;
} else {
i = REDIS_SUBSCRIBE_IDX;
}
if (!sctx->argc && redis_sock->subs[i]) {
sctx->argc = zend_hash_num_elements(redis_sock->subs[i]);
}
array_init(&z_ret);
while (sctx->argc--) {
ZVAL_NULL(&z_resp);
if (!redis_sock_read_multibulk_reply_zval(redis_sock, &z_resp) ||
(z_chan = zend_hash_index_find(Z_ARRVAL(z_resp), 1)) == NULL
) {
efree(sctx);
zval_dtor(&z_resp);
zval_dtor(&z_ret);
RETVAL_FALSE;
return FAILURE;
}
if (!redis_sock->subs[i] ||
!zend_hash_str_exists(redis_sock->subs[i], Z_STRVAL_P(z_chan), Z_STRLEN_P(z_chan))
) {
add_assoc_bool_ex(&z_ret, Z_STRVAL_P(z_chan), Z_STRLEN_P(z_chan), 0);
} else {
zend_hash_str_del(redis_sock->subs[i], Z_STRVAL_P(z_chan), Z_STRLEN_P(z_chan));
add_assoc_bool_ex(&z_ret, Z_STRVAL_P(z_chan), Z_STRLEN_P(z_chan), 1);
}
zval_dtor(&z_resp);
}
efree(sctx);
if (redis_sock->subs[i] && !zend_hash_num_elements(redis_sock->subs[i])) {
zend_hash_destroy(redis_sock->subs[i]);
efree(redis_sock->subs[i]);
redis_sock->subs[i] = NULL;
}
RETVAL_ZVAL(&z_ret, 0, 1);
return SUCCESS;
}
PHP_REDIS_API zval *
redis_sock_read_multibulk_reply_zval(RedisSock *redis_sock, zval *z_tab)
{
int numElems;
if (read_mbulk_header(redis_sock, &numElems) < 0) {
ZVAL_NULL(z_tab);
return NULL;
}
array_init(z_tab);
redis_mbulk_reply_loop(redis_sock, z_tab, numElems, UNSERIALIZE_ALL);
return z_tab;
}
/**
* redis_sock_read_bulk_reply
*/
PHP_REDIS_API char *
redis_sock_read_bulk_reply(RedisSock *redis_sock, int bytes)
{
int offset = 0, nbytes;
char *reply;
ssize_t got;
if (-1 == bytes || -1 == redis_check_eof(redis_sock, 1, 0)) {
return NULL;
}
/* + 2 for \r\n */
nbytes = bytes + 2;
/* Allocate memory for string */
reply = emalloc(nbytes);
/* Consume bulk string */
while (offset < nbytes) {
got = redis_sock_read_raw(redis_sock, reply + offset, nbytes - offset);
if (got < 0 || (got == 0 && php_stream_eof(redis_sock->stream)))
break;
offset += got;
}
/* Protect against reading too few bytes */
if (offset < nbytes) {
/* Error or EOF */
REDIS_THROW_EXCEPTION("socket error on read socket", 0);
efree(reply);
return NULL;
}
/* Null terminate reply string */
reply[bytes] = '\0';
return reply;
}
/**
* redis_sock_read
*/
PHP_REDIS_API char *
redis_sock_read(RedisSock *redis_sock, int *buf_len)
{
char inbuf[4096];
size_t len;
*buf_len = 0;
if (redis_sock_gets(redis_sock, inbuf, sizeof(inbuf) - 1, &len) < 0) {
return NULL;
}
switch(inbuf[0]) {
case '-':
redis_sock_set_err(redis_sock, inbuf+1, len);
/* Filter our ERROR through the few that should actually throw */
redis_error_throw(redis_sock);
return NULL;
case '$':
*buf_len = atoi(inbuf + 1);
return redis_sock_read_bulk_reply(redis_sock, *buf_len);
case '*':
/* For null multi-bulk replies (like timeouts from brpoplpush): */
if(memcmp(inbuf + 1, "-1", 2) == 0) {
return NULL;
}
REDIS_FALLTHROUGH;
case '+':
case ':':
/* Single Line Reply */
/* +OK or :123 */
if (len > 1) {
*buf_len = len;
return estrndup(inbuf, *buf_len);
}
REDIS_FALLTHROUGH;
default:
zend_throw_exception_ex(redis_exception_ce, 0,
"protocol error, got '%c' as reply type byte\n",
inbuf[0]
);
}
return NULL;
}
/* A simple union to store the various arg types we might handle in our
* redis_spprintf command formatting function */
union resparg {
char *str;
zend_string *zstr;
zval *zv;
int ival;
long lval;
double dval;
};
static zend_string *redis_hash_auth(zend_string *user, zend_string *pass) {
zend_string *algo, *hex;
smart_str salted = {0};
const php_hash_ops *ops;
unsigned char *digest;
void *ctx;
/* No op if there is not username/password */
if (user == NULL && pass == NULL)
return NULL;
/* Theoretically impossible but check anyway */
algo = zend_string_init("sha256", sizeof("sha256") - 1, 0);
if ((ops = redis_hash_fetch_ops(algo)) == NULL) {
zend_string_release(algo);
return NULL;
}
/* Hash username + password with our salt global */
smart_str_alloc(&salted, 256, 0);
if (user) smart_str_append_ex(&salted, user, 0);
if (pass) smart_str_append_ex(&salted, pass, 0);
smart_str_appendl_ex(&salted, REDIS_G(salt), sizeof(REDIS_G(salt)), 0);
ctx = emalloc(ops->context_size);
#if PHP_VERSION_ID >= 80100
ops->hash_init(ctx,NULL);
#else
ops->hash_init(ctx);
#endif
ops->hash_update(ctx, (const unsigned char *)ZSTR_VAL(salted.s), ZSTR_LEN(salted.s));
digest = emalloc(ops->digest_size);
ops->hash_final(digest, ctx);
efree(ctx);
hex = zend_string_safe_alloc(ops->digest_size, 2, 0, 0);
php_hash_bin2hex(ZSTR_VAL(hex), digest, ops->digest_size);
ZSTR_VAL(hex)[2 * ops->digest_size] = 0;
efree(digest);
zend_string_release(algo);
smart_str_free(&salted);
return hex;
}
static void append_auth_hash(smart_str *dst, zend_string *user, zend_string *pass) {
zend_string *s;
if ((s = redis_hash_auth(user, pass)) != NULL) {
smart_str_appendc(dst, ':');
smart_str_append_ex(dst, s, 0);
zend_string_release(s);
}
}
/* A printf like function to generate our connection pool hash value. */
PHP_REDIS_API zend_string *
redis_pool_spprintf(RedisSock *redis_sock, char *fmt, ...) {
smart_str str = {0};
smart_str_alloc(&str, 128, 0);
/* We always include phpredis_<host>:<port> */
smart_str_appendl(&str, "phpredis_", sizeof("phpredis_") - 1);
smart_str_append_ex(&str, redis_sock->host, 0);
smart_str_appendc(&str, ':');
smart_str_append_long(&str, (zend_long)redis_sock->port);
/* Short circuit if we don't have a pattern */
if (fmt == NULL) {
smart_str_0(&str);
return str.s;
}
while (*fmt) {
switch (*fmt) {
case 'i':
if (redis_sock->persistent_id) {
smart_str_appendc(&str, ':');
smart_str_append_ex(&str, redis_sock->persistent_id, 0);
}
break;
case 'u':
smart_str_appendc(&str, ':');
if (redis_sock->user) {
smart_str_append_ex(&str, redis_sock->user, 0);
}
break;
case 'p':
append_auth_hash(&str, NULL, redis_sock->pass);
break;
case 'a':
append_auth_hash(&str, redis_sock->user, redis_sock->pass);
break;
default:
/* Maybe issue a php_error_docref? */
break;
}
fmt++;
}
smart_str_0(&str);
return str.s;
}
/* A printf like method to construct a Redis RESP command. It has been extended
* to take a few different format specifiers that are convenient to phpredis.
*
* s - C string followed by length as a
* S - Pointer to a zend_string
* k - Same as 's' but the value will be prefixed if phpredis is set up do do
* that and the working slot will be set if it has been passed.
* v - A z_val which will be serialized if phpredis is configured to serialize.
* f - A double value
* F - Alias to 'f'
* i - An integer
* d - Alias to 'i'
* l - A long
* L - Alias to 'l'
*/
PHP_REDIS_API int
redis_spprintf(RedisSock *redis_sock, short *slot, char **ret, char *kw, char *fmt, ...) {
smart_string cmd = {0};
va_list ap;
union resparg arg;
char *dup;
int argfree;
size_t arglen;
va_start(ap, fmt);
/* Header */
redis_cmd_init_sstr(&cmd, strlen(fmt), kw, strlen(kw));
while (*fmt) {
switch (*fmt) {
case 's':
arg.str = va_arg(ap, char*);
arglen = va_arg(ap, size_t);
redis_cmd_append_sstr(&cmd, arg.str, arglen);
break;
case 'S':
arg.zstr = va_arg(ap, zend_string*);
redis_cmd_append_sstr(&cmd, ZSTR_VAL(arg.zstr), ZSTR_LEN(arg.zstr));
break;
case 'k':
arg.str = va_arg(ap, char*);
arglen = va_arg(ap, size_t);
argfree = redis_key_prefix(redis_sock, &arg.str, &arglen);
redis_cmd_append_sstr(&cmd, arg.str, arglen);
if (slot) *slot = cluster_hash_key(arg.str, arglen);
if (argfree) efree(arg.str);
break;
case 'v':
arg.zv = va_arg(ap, zval*);
argfree = redis_pack(redis_sock, arg.zv, &dup, &arglen);
redis_cmd_append_sstr(&cmd, dup, arglen);
if (argfree) efree(dup);
break;
case 'f':
case 'F':
arg.dval = va_arg(ap, double);
redis_cmd_append_sstr_dbl(&cmd, arg.dval);
break;
case 'i':
case 'd':
arg.ival = va_arg(ap, int);
redis_cmd_append_sstr_int(&cmd, arg.ival);
break;
case 'l':
case 'L':
arg.lval = va_arg(ap, long);
redis_cmd_append_sstr_long(&cmd, arg.lval);
break;
}
fmt++;
}