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513 lines (412 loc) · 14.1 KB
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/* $%BEGINLICENSE%$
Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the
License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
$%ENDLICENSE%$ */
#include <stdlib.h>
#include <string.h>
#include <openssl/evp.h>
#include <glib.h>
#include "network-mysqld-packet.h"
#include "network-backend.h"
#include "chassis-plugin.h"
#include "glib-ext.h"
#define C(x) x, sizeof(x) - 1
#define S(x) x->str, x->len
network_backend_t *network_backend_new(guint event_thread_count) {
network_backend_t *b = g_new0(network_backend_t, 1);
b->pools = g_ptr_array_new();
guint i;
for (i = 0; i <= event_thread_count; ++i) {
network_connection_pool* pool = network_connection_pool_new();
g_ptr_array_add(b->pools, pool);
}
b->uuid = g_string_new(NULL);
b->addr = network_address_new();
return b;
}
void network_backend_free(network_backend_t *b) {
if (!b) return;
guint i;
for (i = 0; i < b->pools->len; ++i) {
network_connection_pool* pool = g_ptr_array_index(b->pools, i);
network_connection_pool_free(pool);
}
g_ptr_array_free(b->pools, TRUE);
if (b->addr) network_address_free(b->addr);
if (b->uuid) g_string_free(b->uuid, TRUE);
g_free(b);
}
network_backends_t *network_backends_new(guint event_thread_count, gchar *default_file) {
network_backends_t *bs;
bs = g_new0(network_backends_t, 1);
bs->backends = g_ptr_array_new();
bs->backends_mutex = g_mutex_new(); /*remove lock*/
bs->global_wrr = g_wrr_poll_new();
bs->event_thread_count = event_thread_count;
bs->default_file = g_strdup(default_file);
bs->raw_ips = g_ptr_array_new_with_free_func(g_free);
bs->raw_pwds = g_ptr_array_new_with_free_func(g_free);
return bs;
}
g_wrr_poll *g_wrr_poll_new() {
g_wrr_poll *global_wrr;
global_wrr = g_new0(g_wrr_poll, 1);
global_wrr->max_weight = 0;
global_wrr->cur_weight = 0;
global_wrr->next_ndx = 0;
return global_wrr;
}
void g_wrr_poll_free(g_wrr_poll *global_wrr) {
g_free(global_wrr);
}
void network_backends_free(network_backends_t *bs) {
gsize i;
if (!bs) return;
g_mutex_lock(bs->backends_mutex); /*remove lock*/
for (i = 0; i < bs->backends->len; i++) {
network_backend_t *backend = bs->backends->pdata[i];
network_backend_free(backend);
}
g_mutex_unlock(bs->backends_mutex); /*remove lock*/
g_ptr_array_free(bs->backends, TRUE);
g_mutex_free(bs->backends_mutex); /*remove lock*/
g_wrr_poll_free(bs->global_wrr);
g_free(bs->default_file);
g_ptr_array_free(bs->raw_ips, TRUE);
g_ptr_array_free(bs->raw_pwds, TRUE);
g_free(bs);
}
int network_backends_remove(network_backends_t *bs, guint index) {
network_backend_t* b = bs->backends->pdata[index];
if (b != NULL) {
if (b->addr) network_address_free(b->addr);
if (b->uuid) g_string_free(b->uuid, TRUE);
g_mutex_lock(bs->backends_mutex);
g_ptr_array_remove_index(bs->backends, index);
g_mutex_unlock(bs->backends_mutex);
}
return 0;
}
void copy_key(guint *key, guint *value, GHashTable *table) {
guint *new_key = g_new0(guint, 1);
*new_key = *key;
g_hash_table_add(table, new_key);
}
void copy_pwd(gchar *key, GString *value, GHashTable *table) {
g_hash_table_insert(table, g_strdup(key), g_string_new_len(S(value)));
}
int network_backends_addclient(network_backends_t *bs, gchar *address) {
guint i;
for (i = 0; i < bs->raw_ips->len; ++i) {
gchar *ip = g_ptr_array_index(bs->raw_ips, i);
if (strcmp(address, ip) == 0) { //若有相同client_ip则不允许add
return -1;
}
}
g_ptr_array_add(bs->raw_ips, g_strdup(address));
guint* sum = g_new0(guint, 1);
char* token;
while ((token = strsep(&address, ".")) != NULL) {
*sum = (*sum << 8) + atoi(token);
}
*sum = htonl(*sum);
gint index = *(bs->ip_table_index);
GHashTable *old_table = bs->ip_table[index];
GHashTable *new_table = bs->ip_table[1-index];
g_hash_table_remove_all(new_table);
g_hash_table_foreach(old_table, copy_key, new_table);
g_hash_table_add(new_table, sum);
g_atomic_int_set(bs->ip_table_index, 1-index);
return 0;
}
static char *encrypt(char *in) {
EVP_CIPHER_CTX ctx;
const EVP_CIPHER *cipher = EVP_des_ecb();
unsigned char key[] = "aCtZlHaUs";
//1. DES加密
EVP_CIPHER_CTX_init(&ctx);
if (EVP_EncryptInit_ex(&ctx, cipher, NULL, key, NULL) != 1) return NULL;
int inl = strlen(in);
unsigned char inter[512] = {};
int interl = 0;
if (EVP_EncryptUpdate(&ctx, inter, &interl, in, inl) != 1) return NULL;
int len = interl;
if (EVP_EncryptFinal_ex(&ctx, inter+len, &interl) != 1) return NULL;
len += interl;
EVP_CIPHER_CTX_cleanup(&ctx);
//2. Base64编码
EVP_ENCODE_CTX ectx;
EVP_EncodeInit(&ectx);
char *out = g_malloc0(512);
int outl = 0;
EVP_EncodeUpdate(&ectx, out, &outl, inter, len);
len = outl;
EVP_EncodeFinal(&ectx, out+len, &outl);
len += outl;
if (out[len-1] == 10) out[len-1] = '\0';
return out;
}
char *decrypt(char *in) {
//1. Base64解码
EVP_ENCODE_CTX dctx;
EVP_DecodeInit(&dctx);
int inl = strlen(in);
unsigned char inter[512] = {};
int interl = 0;
if (EVP_DecodeUpdate(&dctx, inter, &interl, in, inl) == -1) return NULL;
int len = interl;
if (EVP_DecodeFinal(&dctx, inter+len, &interl) != 1) return NULL;
len += interl;
//2. DES解码
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
const EVP_CIPHER *cipher = EVP_des_ecb();
unsigned char key[] = "aCtZlHaUs";
if (EVP_DecryptInit_ex(&ctx, cipher, NULL, key, NULL) != 1) return NULL;
char *out = g_malloc0(512);
int outl = 0;
if (EVP_DecryptUpdate(&ctx, out, &outl, inter, len) != 1) {
g_free(out);
return NULL;
}
len = outl;
if (EVP_DecryptFinal_ex(&ctx, out+len, &outl) != 1) {
g_free(out);
return NULL;
}
len += outl;
EVP_CIPHER_CTX_cleanup(&ctx);
out[len] = '\0';
return out;
}
int network_backends_addpwd(network_backends_t *bs, gchar *user, gchar *pwd, gboolean is_encrypt) {
GString *hashed_password = g_string_new(NULL);
if (is_encrypt) {
gchar *decrypt_pwd = decrypt(pwd);
if (decrypt_pwd == NULL) {
g_warning("failed to decrypt %s\n", pwd);
return ERR_PWD_DECRYPT;
}
network_mysqld_proto_password_hash(hashed_password, decrypt_pwd, strlen(decrypt_pwd));
g_free(decrypt_pwd);
g_ptr_array_add(bs->raw_pwds, g_strdup_printf("%s:%s", user, pwd));
} else {
gchar *encrypt_pwd = encrypt(pwd);
if (encrypt_pwd == NULL) {
g_warning("failed to encrypt %s\n", pwd);
return ERR_PWD_ENCRYPT;
}
g_ptr_array_add(bs->raw_pwds, g_strdup_printf("%s:%s", user, encrypt_pwd));
g_free(encrypt_pwd);
network_mysqld_proto_password_hash(hashed_password, pwd, strlen(pwd));
}
gint index = *(bs->pwd_table_index);
GHashTable *old_table = bs->pwd_table[index];
GHashTable *new_table = bs->pwd_table[1-index];
g_hash_table_remove_all(new_table);
g_hash_table_foreach(old_table, copy_pwd, new_table);
g_hash_table_insert(new_table, g_strdup(user), hashed_password);
g_atomic_int_set(bs->pwd_table_index, 1-index);
return PWD_SUCCESS;
}
int network_backends_removeclient(network_backends_t *bs, gchar *address) {
guint i;
for (i = 0; i < bs->raw_ips->len; ++i) {
gchar *ip = g_ptr_array_index(bs->raw_ips, i);
if (strcmp(address, ip) == 0) { //找到相同client_ip才可remove
g_ptr_array_remove_index(bs->raw_ips, i);
guint sum;
char* token;
while ((token = strsep(&address, ".")) != NULL) {
sum = (sum << 8) + atoi(token);
}
sum = htonl(sum);
gint index = *(bs->ip_table_index);
GHashTable *old_table = bs->ip_table[index];
GHashTable *new_table = bs->ip_table[1-index];
g_hash_table_remove_all(new_table);
g_hash_table_foreach(old_table, copy_key, new_table);
g_hash_table_remove(new_table, &sum);
g_atomic_int_set(bs->ip_table_index, 1-index);
return 0;
}
}
return -1;
}
int network_backends_removepwd(network_backends_t *bs, gchar *address) {
guint i;
for (i = 0; i < bs->raw_pwds->len; ++i) {
gchar *user_pwd = g_ptr_array_index(bs->raw_pwds, i);
gchar *pos = strchr(user_pwd, ':');
g_assert(pos);
*pos = '\0';
if ((strcmp(address, user_pwd) == 0)) { //找到相同user才能remove
*pos = ':';
g_ptr_array_remove_index(bs->raw_pwds, i);
gint index = *(bs->pwd_table_index);
GHashTable *old_table = bs->pwd_table[index];
GHashTable *new_table = bs->pwd_table[1-index];
g_hash_table_remove_all(new_table);
g_hash_table_foreach(old_table, copy_pwd, new_table);
g_hash_table_remove(new_table, address);
g_atomic_int_set(bs->pwd_table_index, 1-index);
return PWD_SUCCESS;
}
*pos = ':';
}
return ERR_USER_NOT_EXIST;
}
void append_key(guint *key, guint *value, GString *str) {
g_string_append_c(str, ',');
guint sum = *key;
g_string_append_printf(str, "%u", sum & 0x000000FF);
guint i;
for (i = 1; i <= 3; ++i) {
sum >>= 8;
g_string_append_printf(str, ".%u", sum & 0x000000FF);
}
}
int network_backends_save(network_backends_t *bs) {
GKeyFile *keyfile = g_key_file_new();
g_key_file_set_list_separator(keyfile, ',');
GError *gerr = NULL;
if (FALSE == g_key_file_load_from_file(keyfile, bs->default_file, G_KEY_FILE_KEEP_COMMENTS, &gerr)) {
g_critical("%s: g_key_file_load_from_file: %s", G_STRLOC, gerr->message);
g_error_free(gerr);
g_key_file_free(keyfile);
return -1;
}
GString *master = g_string_new(NULL);
GString *slave = g_string_new(NULL);
guint i;
GPtrArray *backends = bs->backends;
g_mutex_lock(bs->backends_mutex);
guint len = backends->len;
for (i = 0; i < len; ++i) {
network_backend_t *backend = g_ptr_array_index(backends, i);
if (backend->type == BACKEND_TYPE_RW) {
g_string_append_printf(master, ",%s", backend->addr->name->str);
} else if (backend->type == BACKEND_TYPE_RO) {
g_string_append_printf(slave, ",%s", backend->addr->name->str);
}
}
g_mutex_unlock(bs->backends_mutex);
if (master->len != 0) {
g_key_file_set_value(keyfile, "mysql-proxy", "proxy-backend-addresses", master->str+1);
} else {
g_key_file_set_value(keyfile, "mysql-proxy", "proxy-backend-addresses", "");
}
if (slave->len != 0) {
g_key_file_set_value(keyfile, "mysql-proxy", "proxy-read-only-backend-addresses", slave->str+1);
} else {
g_key_file_set_value(keyfile, "mysql-proxy", "proxy-read-only-backend-addresses", "");
}
g_string_free(master, TRUE);
g_string_free(slave, TRUE);
GString *client_ips = g_string_new(NULL);
for (i = 0; i < bs->raw_ips->len; ++i) {
gchar *client_ip = g_ptr_array_index(bs->raw_ips, i);
g_string_append_printf(client_ips, ",%s", client_ip);
}
if (client_ips->len != 0) {
g_key_file_set_value(keyfile, "mysql-proxy", "client-ips", client_ips->str+1);
} else {
g_key_file_set_value(keyfile, "mysql-proxy", "client-ips", "");
}
g_string_free(client_ips, TRUE);
GString *pwds = g_string_new(NULL);
for (i = 0; i < bs->raw_pwds->len; ++i) {
g_string_append_c(pwds, ',');
gchar *user_pwd = g_ptr_array_index(bs->raw_pwds, i);
g_string_append(pwds, user_pwd);
}
if (pwds->len != 0) {
g_key_file_set_value(keyfile, "mysql-proxy", "pwds", pwds->str+1);
} else {
g_key_file_set_value(keyfile, "mysql-proxy", "pwds", "");
}
g_string_free(pwds, TRUE);
gsize file_size = 0;
gchar *file_buf = g_key_file_to_data(keyfile, &file_size, NULL);
if (FALSE == g_file_set_contents(bs->default_file, file_buf, file_size, &gerr)) {
g_critical("%s: g_file_set_contents: %s", G_STRLOC, gerr->message);
g_free(file_buf);
g_error_free(gerr);
g_key_file_free(keyfile);
return -1;
}
g_message("%s: saving config file succeed", G_STRLOC);
g_free(file_buf);
g_key_file_free(keyfile);
return 0;
}
/*
* FIXME: 1) remove _set_address, make this function callable with result of same
* 2) differentiate between reasons for "we didn't add" (now -1 in all cases)
*/
int network_backends_add(network_backends_t *bs, /* const */ gchar *address, backend_type_t type) {
network_backend_t *new_backend;
guint i;
new_backend = network_backend_new(bs->event_thread_count);
new_backend->type = type;
gchar *p = NULL;
if (type == BACKEND_TYPE_RO) {
guint weight = 1;
p = strrchr(address, '@');
if (p != NULL) {
*p = '\0';
weight = atoi(p+1);
}
new_backend->weight = weight;
}
if (0 != network_address_set_address(new_backend->addr, address)) {
network_backend_free(new_backend);
return -1;
}
/* check if this backend is already known */
g_mutex_lock(bs->backends_mutex); /*remove lock*/
gint first_slave = -1;
for (i = 0; i < bs->backends->len; i++) {
network_backend_t *old_backend = bs->backends->pdata[i];
if (first_slave == -1 && old_backend->type == BACKEND_TYPE_RO) first_slave = i;
if (old_backend->type == type && strleq(S(old_backend->addr->name), S(new_backend->addr->name))) {
network_backend_free(new_backend);
g_mutex_unlock(bs->backends_mutex); /*remove lock*/
g_critical("backend %s is already known!", address);
return -1;
}
}
g_ptr_array_add(bs->backends, new_backend);
if (first_slave != -1 && type == BACKEND_TYPE_RW) {
network_backend_t *temp_backend = bs->backends->pdata[first_slave];
bs->backends->pdata[first_slave] = bs->backends->pdata[bs->backends->len - 1];
bs->backends->pdata[bs->backends->len - 1] = temp_backend;
}
g_mutex_unlock(bs->backends_mutex); /*remove lock*/
g_message("added %s backend: %s", (type == BACKEND_TYPE_RW) ? "read/write" : "read-only", address);
if (p != NULL) *p = '@';
return 0;
}
network_backend_t *network_backends_get(network_backends_t *bs, guint ndx) {
if (ndx >= network_backends_count(bs)) return NULL;
/* FIXME: shouldn't we copy the backend or add ref-counting ? */
return bs->backends->pdata[ndx];
}
guint network_backends_count(network_backends_t *bs) {
guint len;
g_mutex_lock(bs->backends_mutex); /*remove lock*/
len = bs->backends->len;
g_mutex_unlock(bs->backends_mutex); /*remove lock*/
return len;
}