int
relay_server_sock_cb (const void *pointer, void *data, int fd)
{
struct t_relay_server *server;
struct sockaddr_in client_addr;
struct sockaddr_in6 client_addr6;
struct sockaddr_un client_addr_unix;
socklen_t client_addr_size;
void *ptr_addr;
int client_fd, flags, set, max_clients, num_clients_on_port;
char ipv4_address[INET_ADDRSTRLEN + 1], ipv6_address[INET6_ADDRSTRLEN + 1];
char unix_address[sizeof (client_addr_unix.sun_path)];
char *ptr_ip_address, *relay_password, *relay_totp_secret;
/* make C compiler happy */
(void) data;
(void) fd;
client_fd = -1;
relay_password = NULL;
relay_totp_secret = NULL;
server = (struct t_relay_server *)pointer;
if (server->ipv6)
{
ptr_addr = &client_addr6;
client_addr_size = sizeof (struct sockaddr_in6);
}
else if (server->ipv4)
{
ptr_addr = &client_addr;
client_addr_size = sizeof (struct sockaddr_in);
}
else
{
ptr_addr = &client_addr_unix;
client_addr_size = sizeof (struct sockaddr_un);
}
memset (ptr_addr, 0, client_addr_size);
client_fd = accept (server->sock, (struct sockaddr *)ptr_addr,
&client_addr_size);
if (client_fd < 0)
{
if (server->unix_socket)
{
weechat_printf (NULL,
_("%s%s: cannot accept client on path %s (%s): "
"error %d %s"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME,
server->path, server->protocol_string,
errno, strerror (errno));
}
else
{
weechat_printf (NULL,
_("%s%s: cannot accept client on port %d (%s): "
"error %d %s"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME,
server->port, server->protocol_string,
errno, strerror (errno));
}
goto error;
}
/* check if relay password is empty and if it is not allowed */
relay_password = weechat_string_eval_expression (
weechat_config_string (relay_config_network_password),
NULL, NULL, NULL);
if (!weechat_config_boolean (relay_config_network_allow_empty_password)
&& (!relay_password || !relay_password[0]))
{
weechat_printf (NULL,
_("%s%s: cannot accept client because relay password "
"is empty, and option "
"relay.network.allow_empty_password is off"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME);
goto error;
}
if (server->protocol == RELAY_PROTOCOL_WEECHAT)
{
/*
* TOTP can be enabled only as second factor, in addition to the
* password (only for weechat protocol)
*/
relay_totp_secret = weechat_string_eval_expression (
weechat_config_string (relay_config_network_totp_secret),
NULL, NULL, NULL);
if ((!relay_password || !relay_password[0])
&& relay_totp_secret && relay_totp_secret[0])
{
weechat_printf (NULL,
_("%s%s: Time-based One-Time Password (TOTP) "
"can be enabled only as second factor, if the "
"password is not empty"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME);
goto error;
}
if (!relay_config_check_network_totp_secret (
NULL, NULL, NULL,
weechat_config_string (relay_config_network_totp_secret)))
{
goto error;
}
}
/* check if we have reached the max number of clients on this port */
max_clients = weechat_config_integer (relay_config_network_max_clients);
if (max_clients > 0)
{
num_clients_on_port = relay_client_count_active_by_port (server->port);
if (num_clients_on_port >= max_clients)
{
weechat_printf (
NULL,
NG_("%s%s: client not allowed (max %d client is "
"allowed at same time)",
"%s%s: client not allowed (max %d clients are "
"allowed at same time)",
max_clients),
weechat_prefix ("error"), RELAY_PLUGIN_NAME,
max_clients);
goto error;
}
}
/* get the IP address */
ptr_ip_address = NULL;
if (server->ipv6)
{
if (inet_ntop (AF_INET6,
&(client_addr6.sin6_addr),
ipv6_address,
INET6_ADDRSTRLEN))
{
ptr_ip_address = ipv6_address;
if (strncmp (ptr_ip_address, "::ffff:", 7) == 0)
{
/* actually an IPv4-mapped IPv6 address, so skip "::ffff:" */
ptr_ip_address += 7;
}
}
}
else if (server->ipv4)
{
if (inet_ntop (AF_INET,
&(client_addr.sin_addr),
ipv4_address,
INET_ADDRSTRLEN))
{
ptr_ip_address = ipv4_address;
}
}
else
{
strncpy (unix_address, client_addr_unix.sun_path,
sizeof (unix_address));
ptr_ip_address = unix_address;
}
/* check if IP is allowed, if not, just close socket */
if (relay_config_regex_allowed_ips
&& (regexec (relay_config_regex_allowed_ips, ptr_ip_address, 0, NULL, 0) != 0))
{
if (weechat_relay_plugin->debug >= 1)
{
weechat_printf (NULL,
_("%s%s: IP address \"%s\" not allowed for relay"),
weechat_prefix ("error"),
RELAY_PLUGIN_NAME,
ptr_ip_address);
}
goto error;
}
/* set non-blocking mode for socket */
flags = fcntl (client_fd, F_GETFL);
if (flags == -1)
flags = 0;
fcntl (client_fd, F_SETFL, flags | O_NONBLOCK);
/* set socket option SO_REUSEADDR */
set = 1;
if (setsockopt (client_fd, SOL_SOCKET, SO_REUSEADDR,
(void *) &set, sizeof (set)) < 0)
{
weechat_printf (NULL,
_("%s%s: cannot set socket option \"%s\" to %d: "
"error %d %s"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME,
"SO_REUSEADDR", set, errno, strerror (errno));
goto error;
}
/* add the client */
relay_client_new (client_fd, ptr_ip_address, server);
goto end;
error:
if (client_fd >= 0)
close (client_fd);
end:
if (relay_password)
free (relay_password);
if (relay_totp_secret)
free (relay_totp_secret);
return WEECHAT_RC_OK;
}
int
relay_server_sock_cb (void *data, int fd)
{
struct t_relay_server *server;
struct sockaddr_in client_addr;
struct sockaddr_in6 client_addr6;
socklen_t client_addr_size;
void *ptr_addr;
int client_fd, flags, set;
char ipv4_address[INET_ADDRSTRLEN + 1], ipv6_address[INET6_ADDRSTRLEN + 1];
char *ptr_ip_address;
/* make C compiler happy */
(void) fd;
server = (struct t_relay_server *)data;
if (server->ipv6)
{
ptr_addr = &client_addr6;
client_addr_size = sizeof (struct sockaddr_in6);
}
else
{
ptr_addr = &client_addr;
client_addr_size = sizeof (struct sockaddr_in);
}
memset (ptr_addr, 0, client_addr_size);
client_fd = accept (server->sock, (struct sockaddr *)ptr_addr,
&client_addr_size);
if (client_fd < 0)
{
dogechat_printf (NULL,
_("%s%s: cannot accept client on port %d (%s): error %d %s"),
dogechat_prefix ("error"), RELAY_PLUGIN_NAME,
server->port, server->protocol_string,
errno, strerror (errno));
return DOGECHAT_RC_OK;
}
ptr_ip_address = NULL;
if (server->ipv6)
{
if (inet_ntop (AF_INET6,
&(client_addr6.sin6_addr),
ipv6_address,
INET6_ADDRSTRLEN))
{
ptr_ip_address = ipv6_address;
if (strncmp (ptr_ip_address, "::ffff:", 7) == 0)
{
/* actually an IPv4-mapped IPv6 address, so skip "::ffff:" */
ptr_ip_address += 7;
}
}
}
else
{
if (inet_ntop (AF_INET,
&(client_addr.sin_addr),
ipv4_address,
INET_ADDRSTRLEN))
{
ptr_ip_address = ipv4_address;
}
}
/* check if IP is allowed, if not, just close socket */
if (relay_config_regex_allowed_ips
&& (regexec (relay_config_regex_allowed_ips, ptr_ip_address, 0, NULL, 0) != 0))
{
if (dogechat_relay_plugin->debug >= 1)
{
dogechat_printf (NULL,
_("%s%s: IP address \"%s\" not allowed for relay"),
dogechat_prefix ("error"),
RELAY_PLUGIN_NAME,
ptr_ip_address);
}
close (client_fd);
return DOGECHAT_RC_OK;
}
/* set non-blocking mode for socket */
flags = fcntl (client_fd, F_GETFL);
if (flags == -1)
flags = 0;
fcntl (client_fd, F_SETFL, flags | O_NONBLOCK);
/* set socket option SO_REUSEADDR */
set = 1;
if (setsockopt (client_fd, SOL_SOCKET, SO_REUSEADDR,
(void *) &set, sizeof (set)) < 0)
{
dogechat_printf (NULL,
_("%s%s: cannot set socket option \"%s\" to %d: "
"error %d %s"),
dogechat_prefix ("error"), RELAY_PLUGIN_NAME,
"SO_REUSEADDR", set, errno, strerror (errno));
close (client_fd);
return DOGECHAT_RC_OK;
}
/* add the client */
relay_client_new (client_fd, ptr_ip_address, server);
return DOGECHAT_RC_OK;
}
int
relay_server_sock_cb (void *data, int fd)
{
struct t_relay_server *server;
struct sockaddr_in client_addr;
socklen_t client_length;
int client_fd;
char ipv4_address[INET_ADDRSTRLEN + 1], *ptr_address;
/* make C compiler happy */
(void) fd;
server = (struct t_relay_server *)data;
client_length = sizeof (client_addr);
memset (&client_addr, 0, client_length);
client_fd = accept (server->sock, (struct sockaddr *) &client_addr,
&client_length);
if (client_fd < 0)
{
weechat_printf (NULL,
_("%s%s: cannot accept client on port %d (%s%s%s)"),
weechat_prefix ("error"),
RELAY_PLUGIN_NAME,
server->port,
relay_protocol_string[server->protocol],
(server->protocol_args) ? "." : "",
(server->protocol_args) ? server->protocol_args : "");
return WEECHAT_RC_OK;
}
ptr_address = NULL;
if (inet_ntop (AF_INET,
&(client_addr.sin_addr),
ipv4_address,
INET_ADDRSTRLEN))
{
ptr_address = ipv4_address;
}
/* check if IP is allowed, if not, just close socket */
if (relay_config_regex_allowed_ips
&& (regexec (relay_config_regex_allowed_ips, ptr_address, 0, NULL, 0) != 0))
{
if (weechat_relay_plugin->debug >= 2)
{
weechat_printf (NULL,
_("%s%s: IP address \"%s\" not allowed for relay"),
weechat_prefix ("error"),
RELAY_PLUGIN_NAME,
ptr_address);
}
close (client_fd);
return WEECHAT_RC_OK;
}
relay_client_new (client_fd, ptr_address, server);
return WEECHAT_RC_OK;
}
