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/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "buffer.h"
#include "ioloop.h"
#include "hash.h"
#include "llist.h"
#include "base64.h"
#include "global-memory.h"
#include "stats-settings.h"
#include "mail-stats.h"
#include "mail-domain.h"
#include "mail-user.h"
static HASH_TABLE(char *, struct mail_user *) mail_users_hash;
/* users are sorted by their last_update timestamp, oldest first */
static struct mail_user *mail_users_head, *mail_users_tail;
struct mail_user *stable_mail_users;
static size_t mail_user_memsize(const struct mail_user *user)
{
return sizeof(*user) + strlen(user->name) + 1;
}
struct mail_user *mail_user_login(const char *username)
{
struct mail_user *user;
const char *domain;
user = hash_table_lookup(mail_users_hash, username);
if (user != NULL) {
mail_user_refresh(user, NULL);
return user;
}
domain = i_strchr_to_next(username, '@');
if (domain == NULL)
domain = "";
user = i_malloc(MALLOC_ADD(sizeof(struct mail_user), stats_alloc_size()));
user->stats = (void *)(user + 1);
user->name = i_strdup(username);
user->reset_timestamp = ioloop_time;
user->domain = mail_domain_login_create(domain);
hash_table_insert(mail_users_hash, user->name, user);
DLLIST_PREPEND_FULL(&stable_mail_users, user,
stable_prev, stable_next);
DLLIST2_APPEND_FULL(&mail_users_head, &mail_users_tail, user,
sorted_prev, sorted_next);
DLLIST_PREPEND_FULL(&user->domain->users, user,
domain_prev, domain_next);
mail_domain_ref(user->domain);
user->last_update = ioloop_timeval;
global_memory_alloc(mail_user_memsize(user));
return user;
}
void mail_user_disconnected(struct mail_user *user)
{
mail_domain_disconnected(user->domain);
}
struct mail_user *mail_user_lookup(const char *username)
{
return hash_table_lookup(mail_users_hash, username);
}
void mail_user_ref(struct mail_user *user)
{
user->refcount++;
}
void mail_user_unref(struct mail_user **_user)
{
struct mail_user *user = *_user;
i_assert(user->refcount > 0);
user->refcount--;
*_user = NULL;
}
static void mail_user_free(struct mail_user *user)
{
i_assert(user->refcount == 0);
i_assert(user->sessions == NULL);
global_memory_free(mail_user_memsize(user));
hash_table_remove(mail_users_hash, user->name);
DLLIST_REMOVE_FULL(&stable_mail_users, user,
stable_prev, stable_next);
DLLIST2_REMOVE_FULL(&mail_users_head, &mail_users_tail, user,
sorted_prev, sorted_next);
DLLIST_REMOVE_FULL(&user->domain->users, user,
domain_prev, domain_next);
mail_domain_unref(&user->domain);
i_free(user->name);
i_free(user);
}
void mail_user_refresh(struct mail_user *user,
const struct stats *diff_stats)
{
if (diff_stats != NULL)
stats_add(user->stats, diff_stats);
user->last_update = ioloop_timeval;
DLLIST2_REMOVE_FULL(&mail_users_head, &mail_users_tail, user,
sorted_prev, sorted_next);
DLLIST2_APPEND_FULL(&mail_users_head, &mail_users_tail, user,
sorted_prev, sorted_next);
mail_domain_refresh(user->domain, diff_stats);
}
int mail_user_add_parse(const char *const *args, const char **error_r)
{
struct mail_user *user;
struct stats *empty_stats, *diff_stats;
buffer_t *buf;
const char *service, *error;
/* <user> <service> <diff stats> */
if (str_array_length(args) < 3) {
*error_r = "ADD-USER: Too few parameters";
return -1;
}
user = mail_user_login(args[0]);
service = args[1];
buf = t_buffer_create(256);
if (base64_decode(args[2], strlen(args[2]), NULL, buf) < 0) {
*error_r = t_strdup_printf("ADD-USER %s %s: Invalid base64 input",
user->name, service);
return -1;
}
empty_stats = stats_alloc(pool_datastack_create());
diff_stats = stats_alloc(pool_datastack_create());
if (!stats_import(buf->data, buf->used, empty_stats, diff_stats, &error)) {
*error_r = t_strdup_printf("ADD-USER %s %s: %s",
user->name, service, error);
return -1;
}
mail_user_refresh(user, diff_stats);
return 0;
}
void mail_users_free_memory(void)
{
unsigned int diff;
while (mail_users_head != NULL && mail_users_head->refcount == 0) {
mail_user_free(mail_users_head);
if (global_used_memory < stats_settings->memory_limit ||
mail_users_head == NULL)
break;
diff = ioloop_time - mail_users_head->last_update.tv_sec;
if (diff < stats_settings->user_min_time)
break;
}
}
void mail_users_init(void)
{
hash_table_create(&mail_users_hash, default_pool, 0, str_hash, strcmp);
}
void mail_users_deinit(void)
{
while (mail_users_head != NULL)
mail_user_free(mail_users_head);
hash_table_destroy(&mail_users_hash);
}
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