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|
/*
botnet.c : IRC bot plugin for irssi
Copyright (C) 1999-2000 Timo Sirainen
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; either version 2 of the License, or
(at your option) any later version.
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
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "module.h"
#include "network.h"
#include "net-nonblock.h"
#include "signals.h"
#include "commands.h"
#include "misc.h"
#include "line-split.h"
#include "lib-config/iconfig.h"
#include "botnet.h"
void botnet_connection_init(void);
void botnet_connection_deinit(void);
void botnet_users_deinit(void);
void botnet_users_init(void);
GSList *botnets;
void bot_send_cmd(BOT_REC *bot, const char *data)
{
g_return_if_fail(bot != NULL);
g_return_if_fail(data != NULL);
net_transmit(bot->handle, data, strlen(data));
net_transmit(bot->handle, "\n", 1);
}
void bot_send_cmdv(BOT_REC *bot, const char *format, ...)
{
va_list args;
char *str;
va_start(args, format);
str = g_strdup_vprintf(format, args);
bot_send_cmd(bot, str);
g_free(str);
va_end(args);
}
static void botnet_broadcast_single(BOTNET_REC *botnet, BOT_REC *except_bot,
const char *source, const char *data)
{
GNode *node;
char *str;
g_return_if_fail(botnet != NULL);
g_return_if_fail(data != NULL);
str = g_strdup_printf("%s - %s", source != NULL ? source :
botnet->nick, data);
for (node = botnet->bots->children; node != NULL; node = node->next) {
BOT_REC *rec = node->data;
if (rec != except_bot && rec->handle != NULL)
bot_send_cmd(rec, str);
}
g_free(str);
}
/* broadcast a message to everyone in bot network, except for `except_bot'
if it's not NULL. If botnet is NULL, the message is sent to all botnets. */
void botnet_broadcast(BOTNET_REC *botnet, BOT_REC *except_bot,
const char *source, const char *data)
{
GSList *tmp;
g_return_if_fail(data != NULL);
if (botnet != NULL) {
botnet_broadcast_single(botnet, except_bot, source, data);
return;
}
/* broadcast to all botnets */
for (tmp = botnets; tmp != NULL; tmp = tmp->next) {
BOTNET_REC *rec = tmp->data;
botnet_broadcast_single(rec, except_bot, source, data);
}
}
void botnet_send_cmd(BOTNET_REC *botnet, const char *source,
const char *target, const char *data)
{
GNode *node;
char *str;
g_return_if_fail(botnet != NULL);
g_return_if_fail(target != NULL);
g_return_if_fail(data != NULL);
node = bot_find_path(botnet, target);
if (node == NULL) {
g_warning("Can't find route for target %s", target);
return;
}
str = g_strdup_printf("%s %s %s", source != NULL ? source :
botnet->nick, target, data);
bot_send_cmd(node->data, str);
g_free(str);
}
static void escape_buffer(char *buffer, int len)
{
char *dest, *tempbuf, *p;
dest = buffer;
tempbuf = p = g_malloc(len*2+2);
while (len > 0) {
if (*buffer == '\0') {
*p++ = '\\';
*p++ = '0';
} else if (*buffer == '\r') {
*p++ = '\\';
*p++ = 'r';
} else if (*buffer == '\n') {
*p++ = '\\';
*p++ = 'n';
} else if (*buffer == '\\') {
*p++ = '\\';
*p++ = '\\';
} else {
*p++ = *buffer;
}
len--; buffer++;
}
*p++ = '\0';
len = (int) (p-tempbuf);
memcpy(dest, tempbuf, len);
g_free(tempbuf);
}
int botnet_send_file(BOTNET_REC *botnet, const char *target, const char *fname)
{
GNode *node;
GString *str;
char buffer[1024];
int f, len;
node = bot_find_path(botnet, target);
if (node == NULL) {
g_warning("Can't find route for target %s", target);
return FALSE;
}
f = open(fname, O_RDONLY);
if (f == -1) return FALSE;
str = g_string_new(NULL);
g_string_sprintf(str, "%s %s FILE %s", botnet->nick, target, g_basename(fname));
bot_send_cmd(node->data, str->str);
while ((len = read(f, buffer, sizeof(buffer)/2-2)) > 0) {
escape_buffer(buffer, len);
g_string_sprintf(str, "%s %s FILE %s", botnet->nick, target, buffer);
bot_send_cmd(node->data, str->str);
}
g_string_sprintf(str, "%s %s FILE", botnet->nick, target);
bot_send_cmd(node->data, str->str);
g_string_free(str, TRUE);
close(f);
return TRUE;
}
BOTNET_REC *botnet_find(const char *name)
{
GSList *tmp;
g_return_val_if_fail(name != NULL, NULL);
for (tmp = botnets; tmp != NULL; tmp = tmp->next) {
BOTNET_REC *rec = tmp->data;
if (g_strcasecmp(rec->name, name) == 0)
return rec;
}
return NULL;
}
typedef struct {
gconstpointer key;
int priority;
GNode *node;
} BOT_FIND_REC;
static int gnode_find_nick(GNode *node, BOT_FIND_REC *rec)
{
BOT_REC *bot = node->data;
if (bot == NULL) return FALSE;
if (bot->nick != NULL && g_strcasecmp(bot->nick, rec->key) == 0) {
rec->node = node;
return TRUE;
}
return FALSE;
}
GNode *bot_find_nick(BOTNET_REC *botnet, const char *nick)
{
BOT_FIND_REC rec;
g_return_val_if_fail(botnet != NULL, NULL);
g_return_val_if_fail(nick != NULL, NULL);
rec.key = nick;
rec.node = NULL;
g_node_traverse(botnet->bots, 0, G_TRAVERSE_ALL, -1,
(GNodeTraverseFunc) gnode_find_nick, &rec);
return rec.node;
}
/* Return the bot who we should send the message if we wanted `nick' to get it. */
GNode *bot_find_path(BOTNET_REC *botnet, const char *nick)
{
BOT_FIND_REC rec;
GNode *node;
g_return_val_if_fail(botnet != NULL, NULL);
g_return_val_if_fail(nick != NULL, NULL);
rec.key = nick;
rec.node = NULL;
for (node = botnet->bots->children; node != NULL; node = node->next) {
g_node_traverse(node, 0, G_TRAVERSE_ALL, -1,
(GNodeTraverseFunc) gnode_find_nick, &rec);
if (rec.node != NULL) return node;
}
return rec.node;
}
/* check if `addr' is an IP address - this is checked to make sure that
if we have an address like "192.168.0.*", it wouldn't match to host name
192.168.0.host.org */
static int is_ip_mask(const char *addr)
{
while (*addr != '\0') {
if (!i_isdigit(*addr) && *addr != '.' &&
*addr != '*' && *addr != '?') return FALSE;
addr++;
}
return TRUE;
}
BOT_DOWNLINK_REC *bot_downlink_find(BOTNET_REC *botnet, IPADDR *ip, const char *host)
{
GSList *tmp, *tmp2;
char ipname[MAX_IP_LEN];
g_return_val_if_fail(botnet != NULL, NULL);
g_return_val_if_fail(ip != NULL, NULL);
net_ip2host(ip, ipname);
for (tmp = botnet->downlinks; tmp != NULL; tmp = tmp->next) {
BOT_DOWNLINK_REC *rec = tmp->data;
for (tmp2 = rec->valid_addrs; tmp2 != NULL; tmp2 = tmp2->next) {
if (match_wildcards(tmp2->data, ipname))
return rec;
if (match_wildcards(tmp2->data, host) &&
!is_ip_mask(tmp2->data))
return rec;
}
}
return NULL;
}
static int gnode_find_master(GNode *node, BOT_FIND_REC *rec)
{
BOT_REC *bot = node->data;
if (bot == NULL) return FALSE;
if (!bot->disconnect && bot->priority > rec->priority) {
rec->node = node;
return TRUE;
}
return FALSE;
}
BOT_REC *botnet_find_master(BOTNET_REC *botnet, BOT_REC *old_master)
{
BOT_FIND_REC rec;
g_return_val_if_fail(botnet != NULL, NULL);
rec.node = NULL;
rec.priority = old_master == NULL ? -1 : old_master->priority;
g_node_traverse(botnet->bots, 0, G_TRAVERSE_ALL, -1,
(GNodeTraverseFunc) gnode_find_master, &rec);
return rec.node == NULL ? old_master : rec.node->data;
}
void botnet_set_master(BOTNET_REC *botnet, BOT_REC *bot)
{
g_return_if_fail(botnet != NULL);
g_return_if_fail(bot != NULL);
if (botnet->master != NULL)
botnet->master->master = FALSE;
bot->master = TRUE;
botnet->master = bot;
}
void bot_nick_destroy(BOT_CHANNEL_REC *rec, NICK_REC *nick)
{
g_return_if_fail(rec != NULL);
g_return_if_fail(nick != NULL);
rec->nicks = g_slist_remove(rec->nicks, nick);
g_free(nick->nick);
g_free_not_null(nick->realname);
g_free_not_null(nick->host);
g_free(nick);
}
void bot_channel_destroy(BOT_IRCNET_REC *ircnet, BOT_CHANNEL_REC *rec)
{
g_return_if_fail(ircnet != NULL);
g_return_if_fail(rec != NULL);
ircnet->channels = g_slist_remove(ircnet->channels, rec);
while (rec->nicks != NULL)
bot_nick_destroy(rec, rec->nicks->data);
g_slist_foreach(rec->banlist, (GFunc) g_free, NULL);
g_slist_foreach(rec->ebanlist, (GFunc) g_free, NULL);
g_slist_foreach(rec->invitelist, (GFunc) g_free, NULL);
g_slist_free(rec->banlist);
g_slist_free(rec->ebanlist);
g_slist_free(rec->invitelist);
g_free_not_null(rec->mode);
g_free_not_null(rec->key);
g_free(rec->name);
g_free(rec);
}
void bot_ircnet_destroy(BOT_REC *bot, BOT_IRCNET_REC *rec)
{
g_return_if_fail(bot != NULL);
g_return_if_fail(rec != NULL);
bot->ircnets = g_slist_remove(bot->ircnets, bot);
while (rec->channels != NULL)
bot_channel_destroy(rec, rec->channels->data);
g_free(rec->tag);
g_free(rec->ircnet);
g_free(rec->server);
g_free(rec->nick);
g_free(rec);
}
void bot_disconnect(BOT_REC *bot)
{
bot->disconnect = TRUE;
signal_emit("bot disconnected", 1, bot);
if (bot->read_tag != -1) {
g_source_remove(bot->read_tag);
bot->read_tag = -1;
}
if (bot->handle != NULL) {
net_disconnect(bot->handle);
bot->handle = NULL;
}
}
static void bot_mark_disconnect(GNode *node)
{
BOT_REC *bot = node->data;
bot->disconnect = TRUE;
}
#define bot_mark_disconnects(node) \
g_node_traverse(node, G_LEVEL_ORDER, G_TRAVERSE_ALL, -1, \
(GNodeTraverseFunc) bot_mark_disconnect, NULL)
void bot_destroy(BOT_REC *bot)
{
GNode *node;
g_return_if_fail(bot != NULL);
node = g_node_find(bot->botnet->bots, 0, G_TRAVERSE_ALL, bot);
if (node != NULL) {
if (!bot->disconnect)
bot_mark_disconnects(node);
}
bot_disconnect(bot);
if (node != NULL) {
while (node->children != NULL)
bot_destroy(node->children->data);
g_node_destroy(node);
}
if (bot->botnet->uplink == bot)
bot->botnet->uplink = NULL;
if (bot->botnet->master == bot)
bot->botnet->master = NULL;
while (bot->ircnets != NULL)
bot_ircnet_destroy(bot, bot->ircnets->data);
line_split_free(bot->buffer);
g_free_not_null(bot->nick);
g_free(bot);
}
void bot_downlink_destroy(BOT_DOWNLINK_REC *rec)
{
rec->botnet->downlinks = g_slist_remove(rec->botnet->downlinks, rec);
g_slist_foreach(rec->valid_addrs, (GFunc) g_free, NULL);
g_slist_free(rec->valid_addrs);
g_free_not_null(rec->password);
g_free(rec);
}
void bot_uplink_destroy(BOT_UPLINK_REC *rec)
{
rec->botnet->uplinks = g_slist_remove(rec->botnet->uplinks, rec);
g_free(rec->host);
g_free_not_null(rec->password);
g_free(rec);
}
void botnet_disconnect(BOTNET_REC *botnet)
{
botnet->connected = FALSE;
bot_destroy(botnet->bots->data);
botnet->bots = NULL;
if (botnet->listen_tag != -1) {
g_source_remove(botnet->listen_tag);
botnet->listen_tag = -1;
}
if (botnet->listen_handle != NULL) {
net_disconnect(botnet->listen_handle);
botnet->listen_handle = NULL;
}
}
static void botnet_destroy(BOTNET_REC *botnet)
{
botnets = g_slist_remove(botnets, botnet);
while (botnet->uplinks != NULL)
bot_uplink_destroy(botnet->uplinks->data);
while (botnet->downlinks != NULL)
bot_downlink_destroy(botnet->downlinks->data);
botnet_disconnect(botnet);
g_free_not_null(botnet->addr);
g_free(botnet->name);
g_free(botnet->nick);
g_free(botnet);
}
static void botnet_event(BOT_REC *bot, const char *data)
{
char *source, *target, *command, *args, *event;
void *free_arg;
if (!bot->connected)
return;
if (!cmd_get_params(data, &free_arg, 4 | PARAM_FLAG_GETREST,
&source, &target, &command, &args))
return;
if (*target == '-' && target[1] == '\0')
target = NULL;
g_strdown(command);
event = g_strconcat("botnet event ", command, NULL);
signal_emit(event, 4, bot, args, source, target);
g_free(event);
cmd_params_free(free_arg);
}
/* broadcast the signal forward */
static void botnet_event_broadcast(BOT_REC *bot, const char *data)
{
char *source, *target, *command;
void *free_arg;
if (!bot->connected)
return;
if (!cmd_get_params(data, &free_arg, 3 | PARAM_FLAG_GETREST,
&source, &target, &command))
return;
if (g_strcasecmp(target, bot->botnet->nick) == 0) {
/* message was for us */
cmd_params_free(free_arg);
return;
}
if (*target == '-' && target[1] == '\0') {
/* broadcast */
botnet_broadcast(bot->botnet, bot, source, command);
} else {
/* send to specified target */
botnet_send_cmd(bot->botnet, source, target, command);
}
cmd_params_free(free_arg);
}
static void botnet_event_master(BOT_REC *bot, const char *data, const char *sender)
{
BOTNET_REC *botnet;
BOT_REC *master;
GNode *node;
char *str;
botnet = bot->botnet;
node = bot_find_nick(bot->botnet, data);
master = node == NULL ? NULL : node->data;
master = botnet_find_master(bot->botnet, master);
g_return_if_fail(master != NULL);
if (node == NULL || node->data != master) {
/* no, we don't agree with that master -
send our own to everyone. */
bot = NULL;
}
botnet_set_master(botnet, master);
str = g_strdup_printf("MASTER %s", master->nick);
botnet_broadcast(botnet, bot, sender, str);
g_free(str);
signal_stop_by_name("botnet event");
}
static int unescape_data(const char *input, char *output)
{
int len;
len = 0;
while (*input != '\0') {
if (*input != '\\')
*output++ = *input;
else {
input++;
g_return_val_if_fail(*input != '\0', len);
switch (*input) {
case '\\':
*output++ = '\\';
break;
case '0':
*output++ = '\0';
break;
case 'r':
*output++ = '\r';
break;
case 'n':
*output++ = '\n';
break;
}
}
input++;
len++;
}
return len;
}
static void botnet_event_file(BOT_REC *bot, const char *data, const char *sender, const char *target)
{
GNode *node;
char *tempbuf, *str;
int len;
if (g_strcasecmp(target, bot->botnet->nick) != 0)
return;
node = bot_find_nick(bot->botnet, sender);
g_return_if_fail(node != NULL);
bot = node->data;
if (bot->file_handle <= 0) {
/* first line - data contains file name */
str = g_strdup_printf("%s/%s", get_irssi_dir(), data);
bot->file_handle = open(str, O_CREAT|O_TRUNC|O_WRONLY, 0600);
g_free(str);
} else if (*data == '\0') {
/* no data - end of file */
if (bot->file_handle > 0) {
close(bot->file_handle);
bot->file_handle = -1;
}
} else {
/* file data */
tempbuf = g_malloc(strlen(data)*2+2);
len = unescape_data(data, tempbuf);
write(bot->file_handle, tempbuf, len);
g_free(tempbuf);
}
}
static void botnet_config_read_ips(BOT_DOWNLINK_REC *rec, CONFIG_NODE *node)
{
GSList *tmp;
g_return_if_fail(rec != NULL);
g_return_if_fail(node != NULL);
node = config_node_section(node, "valid_addrs", -1);
tmp = node == NULL ? NULL : node->value;
for (; tmp != NULL; tmp = tmp->next) {
node = tmp->data;
rec->valid_addrs = g_slist_append(rec->valid_addrs, g_strdup(node->value));
}
}
static void botnet_config_read_uplink(BOTNET_REC *botnet, CONFIG_NODE *node)
{
BOT_UPLINK_REC *rec;
char *value;
g_return_if_fail(botnet != NULL);
g_return_if_fail(node != NULL);
value = config_node_get_str(node, "host", NULL);
if (value == NULL) return; /* host required */
rec = g_new0(BOT_UPLINK_REC, 1);
rec->botnet = botnet;
rec->host = g_strdup(value);
rec->port = config_node_get_int(node, "port", DEFAULT_BOTNET_PORT);
rec->password = g_strdup(config_node_get_str(node, "password", NULL));
botnet->uplinks = g_slist_append(botnet->uplinks, rec);
}
static void botnet_config_read_downlink(BOTNET_REC *botnet, CONFIG_NODE *node)
{
BOT_DOWNLINK_REC *rec;
g_return_if_fail(botnet != NULL);
g_return_if_fail(node != NULL);
rec = g_new0(BOT_DOWNLINK_REC, 1);
botnet_config_read_ips(rec, node);
if (rec->valid_addrs == NULL) {
g_free(rec);
return;
}
rec->botnet = botnet;
rec->password = g_strdup(config_node_get_str(node, "password", NULL));
botnet->downlinks = g_slist_append(botnet->downlinks, rec);
}
static void botnet_config_read_botnet(CONFIG_NODE *node)
{
CONFIG_NODE *subnode;
BOTNET_REC *botnet;
GSList *tmp;
g_return_if_fail(node != NULL);
if (node->key == NULL || node->value == NULL)
return;
/* New botnet */
botnet = g_new0(BOTNET_REC, 1);
botnet->name = g_strdup(node->key);
botnet->nick = g_strdup(config_node_get_str(node, "nick", "bot"));
botnet->priority = config_node_get_int(node, "priority", DEFAULT_BOTNET_PRIORITY);
botnet->autoconnect = config_node_get_bool(node, "autoconnect", FALSE);
botnet->addr = g_strdup(config_node_get_str(node, "listen_addr", NULL));
botnet->port = config_node_get_int(node, "listen_port", DEFAULT_BOTNET_PORT);
botnet->listen_tag = -1;
/* read uplinks */
subnode = config_node_section(node, "uplinks", -1);
tmp = subnode == NULL ? NULL : subnode->value;
for (; tmp != NULL; tmp = tmp->next)
botnet_config_read_uplink(botnet, tmp->data);
/* read downlinks */
subnode = config_node_section(node, "downlinks", -1);
tmp = subnode == NULL ? NULL : subnode->value;
for (; tmp != NULL; tmp = tmp->next)
botnet_config_read_downlink(botnet, tmp->data);
botnets = g_slist_append(botnets, botnet);
}
static void botnet_config_read(void)
{
CONFIG_REC *config;
CONFIG_NODE *node;
GSList *tmp;
char *fname;
/* Read botnets from ~/.irssi/botnets */
fname = g_strdup_printf("%s/botnets", get_irssi_dir());
config = config_open(fname, -1);
g_free(fname);
if (config == NULL)
return;
config_parse(config);
node = config_node_traverse(config, "botnets", FALSE);
tmp = node == NULL ? NULL : node->value;
for (; tmp != NULL; tmp = tmp->next)
botnet_config_read_botnet(tmp->data);
config_close(config);
}
/* FIXME: this command is just temporary */
static void cmd_botnet(const char *data)
{
BOTNET_REC *botnet;
char *str;
botnet = botnets->data;
str = g_strdup_printf("BCAST %s", data);
botnet_broadcast(botnet, NULL, NULL, str);
g_free(str);
}
static void autoconnect_botnets(void)
{
GSList *tmp;
for (tmp = botnets; tmp != NULL; tmp = tmp->next) {
BOTNET_REC *rec = tmp->data;
if (rec->autoconnect)
botnet_connect(rec);
}
}
void botnet_init(void)
{
botnet_config_read();
botnet_connection_init();
botnet_users_init();
signal_add("botnet event", (SIGNAL_FUNC) botnet_event);
signal_add_last("botnet event", (SIGNAL_FUNC) botnet_event_broadcast);
signal_add("botnet event master", (SIGNAL_FUNC) botnet_event_master);
signal_add("botnet event file", (SIGNAL_FUNC) botnet_event_file);
command_bind("botnet", NULL, (SIGNAL_FUNC) cmd_botnet);
autoconnect_botnets();
}
void botnet_deinit(void)
{
while (botnets)
botnet_destroy(botnets->data);
botnet_connection_deinit();
botnet_users_deinit();
signal_remove("botnet event", (SIGNAL_FUNC) botnet_event);
signal_remove("botnet event", (SIGNAL_FUNC) botnet_event_broadcast);
signal_remove("botnet event master", (SIGNAL_FUNC) botnet_event_master);
signal_remove("botnet event file", (SIGNAL_FUNC) botnet_event_file);
command_unbind("botnet", (SIGNAL_FUNC) cmd_botnet);
}
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