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weechat/src/core/wee-proxy.c

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/*
* wee-proxy.c - proxy functions
*
* Copyright (C) 2003-2020 Sébastien Helleu <flashcode@flashtux.org>
*
* This file is part of WeeChat, the extensible chat client.
*
* WeeChat 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 3 of the License, or
* (at your option) any later version.
*
* WeeChat 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 WeeChat. If not, see <https://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include "weechat.h"
#include "wee-proxy.h"
#include "wee-config.h"
#include "wee-hdata.h"
#include "wee-infolist.h"
#include "wee-log.h"
#include "wee-string.h"
#include "../plugins/plugin.h"
char *proxy_option_string[PROXY_NUM_OPTIONS] =
{ "type", "ipv6", "address", "port", "username", "password" };
char *proxy_option_default[PROXY_NUM_OPTIONS] =
{ "http", "off", "127.0.0.1", "3128", "", "" };
char *proxy_type_string[PROXY_NUM_TYPES] =
{ "http", "socks4", "socks5" };
struct t_proxy *weechat_proxies = NULL; /* first proxy */
struct t_proxy *last_weechat_proxy = NULL; /* last proxy */
struct t_proxy *weechat_temp_proxies = NULL; /* proxies used when */
struct t_proxy *last_weechat_temp_proxy = NULL; /* reading configuration */
/*
* Searches for a proxy option.
*
* Returns index of option in enum t_proxy_option, -1 if option is not found.
*/
int
proxy_search_option (const char *option_name)
{
int i;
if (!option_name)
return -1;
for (i = 0; i < PROXY_NUM_OPTIONS; i++)
{
if (string_strcasecmp (proxy_option_string[i], option_name) == 0)
return i;
}
/* proxy option not found */
return -1;
}
/*
* Searches for a proxy type.
*
* Returns index of option in enum t_proxy_type, -1 if type is not found.
*/
int
proxy_search_type (const char *type)
{
int i;
if (!type)
return -1;
for (i = 0; i < PROXY_NUM_TYPES; i++)
{
if (string_strcasecmp (proxy_type_string[i], type) == 0)
return i;
}
/* type not found */
return -1;
}
/*
* Checks if a proxy pointer is valid.
*
* Returns:
* 1: proxy exists
* 0: proxy does not exist
*/
int
proxy_valid (struct t_proxy *proxy)
{
struct t_proxy *ptr_proxy;
if (!proxy)
return 0;
for (ptr_proxy = weechat_proxies; ptr_proxy;
ptr_proxy = ptr_proxy->next_proxy)
{
if (ptr_proxy == proxy)
return 1;
}
/* proxy not found */
return 0;
}
/*
* Searches for a proxy by name.
*
* Returns pointer to proxy found, NULL if not found.
*/
struct t_proxy *
proxy_search (const char *name)
{
struct t_proxy *ptr_proxy;
if (!name || !name[0])
return NULL;
for (ptr_proxy = weechat_proxies; ptr_proxy;
ptr_proxy = ptr_proxy->next_proxy)
{
if (strcmp (ptr_proxy->name, name) == 0)
return ptr_proxy;
}
/* proxy not found */
return NULL;
}
/*
* Sets name for a proxy.
*/
void
proxy_set_name (struct t_proxy *proxy, const char *name)
{
int length;
char *option_name;
if (!name || !name[0])
return;
length = strlen (name) + 64;
option_name = malloc (length);
if (option_name)
{
snprintf (option_name, length, "%s.type", name);
config_file_option_rename (proxy->options[PROXY_OPTION_TYPE], option_name);
snprintf (option_name, length, "%s.ipv6", name);
config_file_option_rename (proxy->options[PROXY_OPTION_IPV6], option_name);
snprintf (option_name, length, "%s.address", name);
config_file_option_rename (proxy->options[PROXY_OPTION_ADDRESS], option_name);
snprintf (option_name, length, "%s.port", name);
config_file_option_rename (proxy->options[PROXY_OPTION_PORT], option_name);
snprintf (option_name, length, "%s.username", name);
config_file_option_rename (proxy->options[PROXY_OPTION_USERNAME], option_name);
snprintf (option_name, length, "%s.password", name);
config_file_option_rename (proxy->options[PROXY_OPTION_PASSWORD], option_name);
if (proxy->name)
free (proxy->name);
proxy->name = strdup (name);
free (option_name);
}
}
/*
* Sets a property for a proxy.
*
* Returns:
* 1: OK
* 0: error
*/
int
proxy_set (struct t_proxy *proxy, const char *property, const char *value)
{
if (!proxy || !property || !value)
return 0;
if (string_strcasecmp (property, "name") == 0)
{
proxy_set_name (proxy, value);
return 1;
}
else if (string_strcasecmp (property, "type") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_TYPE], value, 1);
return 1;
}
else if (string_strcasecmp (property, "ipv6") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_IPV6], value, 1);
return 1;
}
else if (string_strcasecmp (property, "address") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_ADDRESS], value, 1);
return 1;
}
else if (string_strcasecmp (property, "port") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_PORT], value, 1);
return 1;
}
else if (string_strcasecmp (property, "username") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_USERNAME], value, 1);
return 1;
}
else if (string_strcasecmp (property, "password") == 0)
{
config_file_option_set (proxy->options[PROXY_OPTION_PASSWORD], value, 1);
return 1;
}
return 0;
}
/*
* Creates an option for a proxy.
*
* Returns pointer to new option, NULL if error.
*/
struct t_config_option *
proxy_create_option (const char *proxy_name, int index_option,
const char *value)
{
struct t_config_option *ptr_option;
int length;
char *option_name;
ptr_option = NULL;
length = strlen (proxy_name) + 1 +
strlen (proxy_option_string[index_option]) + 1;
option_name = malloc (length);
if (!option_name)
return NULL;
snprintf (option_name, length, "%s.%s",
proxy_name, proxy_option_string[index_option]);
switch (index_option)
{
case PROXY_OPTION_TYPE:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "integer",
N_("proxy type (http (default), socks4, socks5)"),
"http|socks4|socks5", 0, 0, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_OPTION_IPV6:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "boolean",
N_("connect to proxy using ipv6"),
NULL, 0, 0, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_OPTION_ADDRESS:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "string",
N_("proxy server address (IP or hostname)"),
NULL, 0, 0, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_OPTION_PORT:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "integer",
N_("port for connecting to proxy server"),
NULL, 0, 65535, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_OPTION_USERNAME:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "string",
N_("username for proxy server "
"(note: content is evaluated, see /help eval)"),
NULL, 0, 0, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_OPTION_PASSWORD:
ptr_option = config_file_new_option (
weechat_config_file, weechat_config_section_proxy,
option_name, "string",
N_("password for proxy server "
"(note: content is evaluated, see /help eval)"),
NULL, 0, 0, value, NULL, 0,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
break;
case PROXY_NUM_OPTIONS:
break;
}
free (option_name);
return ptr_option;
}
/*
* Creates an option for a temporary proxy (when reading configuration file).
*/
void
proxy_create_option_temp (struct t_proxy *temp_proxy, int index_option,
const char *value)
{
struct t_config_option *new_option;
new_option = proxy_create_option (temp_proxy->name,
index_option,
value);
if (new_option && (index_option >= 0))
temp_proxy->options[index_option] = new_option;
}
/*
* Allocates and initializes a new proxy structure.
*
* Returns pointer to new proxy, NULL if error.
*/
struct t_proxy *
proxy_alloc (const char *name)
{
struct t_proxy *new_proxy;
int i;
new_proxy = malloc (sizeof (*new_proxy));
if (new_proxy)
{
new_proxy->name = strdup (name);
for (i = 0; i < PROXY_NUM_OPTIONS; i++)
{
new_proxy->options[i] = NULL;
}
new_proxy->prev_proxy = NULL;
new_proxy->next_proxy = NULL;
}
return new_proxy;
}
/*
* Adds a new proxy with options.
*
* Returns pointer to new proxy, NULL if error.
*/
struct t_proxy *
proxy_new_with_options (const char *name,
struct t_config_option *type,
struct t_config_option *ipv6,
struct t_config_option *address,
struct t_config_option *port,
struct t_config_option *username,
struct t_config_option *password)
{
struct t_proxy *new_proxy;
/* add proxy */
new_proxy = proxy_alloc (name);
if (!new_proxy)
return NULL;
new_proxy->options[PROXY_OPTION_TYPE] = type;
new_proxy->options[PROXY_OPTION_IPV6] = ipv6;
new_proxy->options[PROXY_OPTION_ADDRESS] = address;
new_proxy->options[PROXY_OPTION_PORT] = port;
new_proxy->options[PROXY_OPTION_USERNAME] = username;
new_proxy->options[PROXY_OPTION_PASSWORD] = password;
/* add proxy to proxies list */
new_proxy->prev_proxy = last_weechat_proxy;
if (last_weechat_proxy)
last_weechat_proxy->next_proxy = new_proxy;
else
weechat_proxies = new_proxy;
last_weechat_proxy = new_proxy;
new_proxy->next_proxy = NULL;
return new_proxy;
}
/*
* Adds a new proxy.
*
* Returns pointer to new proxy, NULL if error.
*/
struct t_proxy *
proxy_new (const char *name, const char *type, const char *ipv6,
const char *address, const char *port, const char *username,
const char *password)
{
struct t_config_option *option_type, *option_ipv6, *option_address;
struct t_config_option *option_port, *option_username, *option_password;
struct t_proxy *new_proxy;
if (!name || !name[0])
return NULL;
/* it's not possible to add 2 proxies with same name */
if (proxy_search (name))
return NULL;
/* look for type */
if (proxy_search_type (type) < 0)
return NULL;
option_type = proxy_create_option (name, PROXY_OPTION_TYPE,
type);
option_ipv6 = proxy_create_option (name, PROXY_OPTION_IPV6,
ipv6);
option_address = proxy_create_option (name, PROXY_OPTION_ADDRESS,
(address) ? address : "");
option_port = proxy_create_option (name, PROXY_OPTION_PORT,
port);
option_username = proxy_create_option (name, PROXY_OPTION_USERNAME,
(username) ? username : "");
option_password = proxy_create_option (name, PROXY_OPTION_PASSWORD,
(password) ? password : "");
new_proxy = proxy_new_with_options (name, option_type, option_ipv6,
option_address, option_port,
option_username, option_password);
if (!new_proxy)
{
if (option_type)
config_file_option_free (option_type, 0);
if (option_ipv6)
config_file_option_free (option_ipv6, 0);
if (option_address)
config_file_option_free (option_address, 0);
if (option_port)
config_file_option_free (option_port, 0);
if (option_username)
config_file_option_free (option_username, 0);
if (option_password)
config_file_option_free (option_password, 0);
}
return new_proxy;
}
/*
* Uses temporary proxies (added by reading configuration file).
*/
void
proxy_use_temp_proxies ()
{
struct t_proxy *ptr_temp_proxy, *next_temp_proxy;
int i, num_options_ok;
for (ptr_temp_proxy = weechat_temp_proxies; ptr_temp_proxy;
ptr_temp_proxy = ptr_temp_proxy->next_proxy)
{
num_options_ok = 0;
for (i = 0; i < PROXY_NUM_OPTIONS; i++)
{
if (!ptr_temp_proxy->options[i])
{
ptr_temp_proxy->options[i] = proxy_create_option (ptr_temp_proxy->name,
i,
proxy_option_default[i]);
}
if (ptr_temp_proxy->options[i])
num_options_ok++;
}
if (num_options_ok == PROXY_NUM_OPTIONS)
{
proxy_new_with_options (ptr_temp_proxy->name,
ptr_temp_proxy->options[PROXY_OPTION_TYPE],
ptr_temp_proxy->options[PROXY_OPTION_IPV6],
ptr_temp_proxy->options[PROXY_OPTION_ADDRESS],
ptr_temp_proxy->options[PROXY_OPTION_PORT],
ptr_temp_proxy->options[PROXY_OPTION_USERNAME],
ptr_temp_proxy->options[PROXY_OPTION_PASSWORD]);
}
else
{
for (i = 0; i < PROXY_NUM_OPTIONS; i++)
{
if (ptr_temp_proxy->options[i])
{
config_file_option_free (ptr_temp_proxy->options[i], 0);
ptr_temp_proxy->options[i] = NULL;
}
}
}
}
/* free all temp proxies */
while (weechat_temp_proxies)
{
next_temp_proxy = weechat_temp_proxies->next_proxy;
if (weechat_temp_proxies->name)
free (weechat_temp_proxies->name);
free (weechat_temp_proxies);
weechat_temp_proxies = next_temp_proxy;
}
last_weechat_temp_proxy = NULL;
}
/*
* Frees a proxy.
*/
void
proxy_free (struct t_proxy *proxy)
{
int i;
if (!proxy)
return;
/* remove proxy from proxies list */
if (proxy->prev_proxy)
(proxy->prev_proxy)->next_proxy = proxy->next_proxy;
if (proxy->next_proxy)
(proxy->next_proxy)->prev_proxy = proxy->prev_proxy;
if (weechat_proxies == proxy)
weechat_proxies = proxy->next_proxy;
if (last_weechat_proxy == proxy)
last_weechat_proxy = proxy->prev_proxy;
/* free data */
if (proxy->name)
free (proxy->name);
for (i = 0; i < PROXY_NUM_OPTIONS; i++)
{
config_file_option_free (proxy->options[i], 1);
}
free (proxy);
}
/*
* Frees all proxies.
*/
void
proxy_free_all ()
{
while (weechat_proxies)
{
proxy_free (weechat_proxies);
}
}
/*
* Returns hdata for proxy.
*/
struct t_hdata *
proxy_hdata_proxy_cb (const void *pointer, void *data,
const char *hdata_name)
{
struct t_hdata *hdata;
/* make C compiler happy */
(void) pointer;
(void) data;
hdata = hdata_new (NULL, hdata_name, "prev_proxy", "next_proxy",
0, 0, NULL, NULL);
if (hdata)
{
HDATA_VAR(struct t_proxy, name, STRING, 0, NULL, NULL);
HDATA_VAR(struct t_proxy, options, POINTER, 0, NULL, NULL);
HDATA_VAR(struct t_proxy, prev_proxy, POINTER, 0, NULL, hdata_name);
HDATA_VAR(struct t_proxy, next_proxy, POINTER, 0, NULL, hdata_name);
HDATA_LIST(weechat_proxies, WEECHAT_HDATA_LIST_CHECK_POINTERS);
HDATA_LIST(last_weechat_proxy, 0);
}
return hdata;
}
/*
* Adds a proxy in an infolist.
*
* Returns:
* 1: OK
* 0: error
*/
int
proxy_add_to_infolist (struct t_infolist *infolist, struct t_proxy *proxy)
{
struct t_infolist_item *ptr_item;
if (!infolist || !proxy)
return 0;
ptr_item = infolist_new_item (infolist);
if (!ptr_item)
return 0;
if (!infolist_new_var_string (ptr_item, "name", proxy->name))
return 0;
if (!infolist_new_var_integer (ptr_item, "type", CONFIG_INTEGER(proxy->options[PROXY_OPTION_TYPE])))
return 0;
if (!infolist_new_var_string (ptr_item, "type_string", proxy_type_string[CONFIG_INTEGER(proxy->options[PROXY_OPTION_TYPE])]))
return 0;
if (!infolist_new_var_integer (ptr_item, "ipv6", CONFIG_INTEGER(proxy->options[PROXY_OPTION_IPV6])))
return 0;
if (!infolist_new_var_string (ptr_item, "address", CONFIG_STRING(proxy->options[PROXY_OPTION_ADDRESS])))
return 0;
if (!infolist_new_var_integer (ptr_item, "port", CONFIG_INTEGER(proxy->options[PROXY_OPTION_PORT])))
return 0;
if (!infolist_new_var_string (ptr_item, "username", CONFIG_STRING(proxy->options[PROXY_OPTION_USERNAME])))
return 0;
if (!infolist_new_var_string (ptr_item, "password", CONFIG_STRING(proxy->options[PROXY_OPTION_PASSWORD])))
return 0;
return 1;
}
/*
* Prints proxies in WeeChat log file (usually for crash dump).
*/
void
proxy_print_log ()
{
struct t_proxy *ptr_proxy;
for (ptr_proxy = weechat_proxies; ptr_proxy;
ptr_proxy = ptr_proxy->next_proxy)
{
log_printf ("");
log_printf ("[proxy (addr:0x%lx)]", ptr_proxy);
log_printf (" name . . . . . . . . . : '%s'", ptr_proxy->name);
log_printf (" type . . . . . . . . . : %d (%s)",
CONFIG_INTEGER(ptr_proxy->options[PROXY_OPTION_TYPE]),
proxy_type_string[CONFIG_INTEGER(ptr_proxy->options[PROXY_OPTION_TYPE])]);
log_printf (" ipv6 . . . . . . . . . : %d", CONFIG_INTEGER(ptr_proxy->options[PROXY_OPTION_IPV6]));
log_printf (" address. . . . . . . . : '%s'", CONFIG_STRING(ptr_proxy->options[PROXY_OPTION_ADDRESS]));
log_printf (" port . . . . . . . . . : %d", CONFIG_INTEGER(ptr_proxy->options[PROXY_OPTION_PORT]));
log_printf (" username . . . . . . . : '%s'", CONFIG_STRING(ptr_proxy->options[PROXY_OPTION_USERNAME]));
log_printf (" password . . . . . . . : '%s'", CONFIG_STRING(ptr_proxy->options[PROXY_OPTION_PASSWORD]));
log_printf (" prev_proxy . . . . . . : 0x%lx", ptr_proxy->prev_proxy);
log_printf (" next_proxy . . . . . . : 0x%lx", ptr_proxy->next_proxy);
}
}
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