unbound
0.1
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This file has functions to get queries from clients. More...
#include "config.h"
#include <sys/time.h>
#include "services/listen_dnsport.h"
#include "services/outside_network.h"
#include "util/netevent.h"
#include "util/log.h"
#include "util/config_file.h"
#include "util/net_help.h"
#include "sldns/sbuffer.h"
#include <fcntl.h>
Macros | |
#define | TCP_BACKLOG 256 |
number of queued TCP connections for listen() | |
Functions | |
static void | verbose_print_addr (struct addrinfo *addr) |
Debug print of the getaddrinfo returned address. More... | |
int | create_udp_sock (int family, int socktype, struct sockaddr *addr, socklen_t addrlen, int v6only, int *inuse, int *noproto, int rcv, int snd, int listen, int *reuseport, int transparent, int freebind, int use_systemd) |
Create and bind nonblocking UDP socket. More... | |
int | create_tcp_accept_sock (struct addrinfo *addr, int v6only, int *noproto, int *reuseport, int transparent, int mss, int freebind, int use_systemd) |
Create and bind TCP listening socket. More... | |
int | create_local_accept_sock (const char *path, int *noproto, int use_systemd) |
Create and bind local listening socket. More... | |
static int | make_sock (int stype, const char *ifname, const char *port, struct addrinfo *hints, int v6only, int *noip6, size_t rcv, size_t snd, int *reuseport, int transparent, int tcp_mss, int freebind, int use_systemd) |
Create socket from getaddrinfo results. | |
static int | make_sock_port (int stype, const char *ifname, const char *port, struct addrinfo *hints, int v6only, int *noip6, size_t rcv, size_t snd, int *reuseport, int transparent, int tcp_mss, int freebind, int use_systemd) |
make socket and first see if ifname contains port override info | |
static int | port_insert (struct listen_port **list, int s, enum listen_type ftype) |
Add port to open ports list. More... | |
static int | set_recvpktinfo (int s, int family) |
set fd to receive source address packet info | |
static int | ports_create_if (const char *ifname, int do_auto, int do_udp, int do_tcp, struct addrinfo *hints, const char *port, struct listen_port **list, size_t rcv, size_t snd, int ssl_port, int *reuseport, int transparent, int tcp_mss, int freebind, int use_systemd, int dnscrypt_port) |
Helper for ports_open. More... | |
static int | listen_cp_insert (struct comm_point *c, struct listen_dnsport *front) |
Add items to commpoint list in front. More... | |
struct listen_dnsport * | listen_create (struct comm_base *base, struct listen_port *ports, size_t bufsize, int tcp_accept_count, void *sslctx, struct dt_env *dtenv, comm_point_callback_type *cb, void *cb_arg) |
Create commpoints with for this thread for the shared ports. More... | |
void | listen_list_delete (struct listen_list *list) |
delete listen_list of commpoints. More... | |
void | listen_delete (struct listen_dnsport *front) |
delete the listening structure More... | |
struct listen_port * | listening_ports_open (struct config_file *cfg, int *reuseport) |
Create shared listening ports Getaddrinfo, create socket, bind and listen to zero or more interfaces for IP4 and/or IP6, for UDP and/or TCP. More... | |
void | listening_ports_free (struct listen_port *list) |
Close and delete the (list of) listening ports. | |
size_t | listen_get_mem (struct listen_dnsport *listen) |
get memory size used by the listening structs More... | |
void | listen_stop_accept (struct listen_dnsport *listen) |
stop accept handlers for TCP (until enabled again) More... | |
void | listen_start_accept (struct listen_dnsport *listen) |
start accept handlers for TCP (was stopped before) More... | |
This file has functions to get queries from clients.
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Debug print of the getaddrinfo returned address.
addr | the address returned. |
References VERB_ALGO, verbose(), and verbosity.
Referenced by create_tcp_accept_sock(), and make_sock().
int create_udp_sock | ( | int | family, |
int | socktype, | ||
struct sockaddr * | addr, | ||
socklen_t | addrlen, | ||
int | v6only, | ||
int * | inuse, | ||
int * | noproto, | ||
int | rcv, | ||
int | snd, | ||
int | listen, | ||
int * | reuseport, | ||
int | transparent, | ||
int | freebind, | ||
int | use_systemd | ||
) |
Create and bind nonblocking UDP socket.
family | for socket call. |
socktype | for socket call. |
addr | for bind call. |
addrlen | for bind call. |
v6only | if enabled, IP6 sockets get IP6ONLY option set. if enabled with value 2 IP6ONLY option is disabled. |
inuse | on error, this is set true if the port was in use. |
noproto | on error, this is set true if cause is that the IPv6 proto (family) is not available. |
rcv | set size on rcvbuf with socket option, if 0 it is not set. |
snd | set size on sndbuf with socket option, if 0 it is not set. |
listen | if true, this is a listening UDP port, eg port 53, and set SO_REUSEADDR on it. |
reuseport | if nonNULL and true, try to set SO_REUSEPORT on listening UDP port. Set to false on return if it failed to do so. |
transparent | set IP_TRANSPARENT socket option. |
freebind | set IP_FREEBIND socket option. |
use_systemd | if true, fetch sockets from systemd. |
References fd_set_nonblock(), log_err(), log_err_addr(), log_warn(), and verbosity.
Referenced by make_sock().
int create_tcp_accept_sock | ( | struct addrinfo * | addr, |
int | v6only, | ||
int * | noproto, | ||
int * | reuseport, | ||
int | transparent, | ||
int | mss, | ||
int | freebind, | ||
int | use_systemd | ||
) |
Create and bind TCP listening socket.
addr | address info ready to make socket. |
v6only | enable ip6 only flag on ip6 sockets. |
noproto | if error caused by lack of protocol support. |
reuseport | if nonNULL and true, try to set SO_REUSEPORT on listening UDP port. Set to false on return if it failed to do so. |
transparent | set IP_TRANSPARENT socket option. |
mss | maximum segment size of the socket. if zero, leaves the default. |
freebind | set IP_FREEBIND socket option. |
use_systemd | if true, fetch sockets from systemd. |
References fd_set_nonblock(), log_err(), log_err_addr(), log_warn(), TCP_BACKLOG, VERB_ALGO, verbose(), verbose_print_addr(), and verbosity.
Referenced by add_open(), and make_sock().
int create_local_accept_sock | ( | const char * | path, |
int * | noproto, | ||
int | use_systemd | ||
) |
Create and bind local listening socket.
path | path to the socket. |
noproto | on error, this is set true if cause is that local sockets are not supported. |
use_systemd | if true, fetch sockets from systemd. |
References fd_set_nonblock(), log_err(), TCP_BACKLOG, VERB_ALGO, and verbose().
Referenced by add_open().
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Add port to open ports list.
list | list head. changed. |
s | fd. |
ftype | if fd is UDP. |
References listen_port::fd, listen_port::ftype, and listen_port::next.
Referenced by ports_create_if().
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Helper for ports_open.
Creates one interface (or NULL for default).
ifname | The interface ip address. |
do_auto | use automatic interface detection. If enabled, then ifname must be the wildcard name. |
do_udp | if udp should be used. |
do_tcp | if udp should be used. |
hints | for getaddrinfo. family and flags have to be set by caller. |
port | Port number to use (as string). |
list | list of open ports, appended to, changed to point to list head. |
rcv | receive buffer size for UDP |
snd | send buffer size for UDP |
ssl_port | ssl service port number |
reuseport | try to set SO_REUSEPORT if nonNULL and true. set to false on exit if reuseport failed due to no kernel support. |
transparent | set IP_TRANSPARENT socket option. |
tcp_mss | maximum segment size of tcp socket. default if zero. |
freebind | set IP_FREEBIND socket option. |
use_systemd | if true, fetch sockets from systemd. |
dnscrypt_port | dnscrypt service port number |
References listen_type_ssl, listen_type_tcp, listen_type_tcp_dnscrypt, listen_type_udp, listen_type_udp_dnscrypt, listen_type_udpancil, listen_type_udpancil_dnscrypt, log_warn(), make_sock_port(), port_insert(), set_recvpktinfo(), VERB_ALGO, and verbose().
Referenced by listening_ports_open().
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Add items to commpoint list in front.
c | commpoint to add. |
front | listen struct. |
References listen_list::com, listen_dnsport::cps, and listen_list::next.
Referenced by listen_create().
struct listen_dnsport* listen_create | ( | struct comm_base * | base, |
struct listen_port * | ports, | ||
size_t | bufsize, | ||
int | tcp_accept_count, | ||
void * | sslctx, | ||
struct dt_env * | dtenv, | ||
comm_point_callback_type * | cb, | ||
void * | cb_arg | ||
) |
Create commpoints with for this thread for the shared ports.
base | the comm_base that provides event functionality. for default all ifs. |
ports | the list of shared ports. |
bufsize | size of datagram buffer. |
tcp_accept_count | max number of simultaneous TCP connections from clients. |
sslctx | nonNULL if ssl context. |
dtenv | nonNULL if dnstap enabled. |
cb | callback function when a request arrives. It is passed the packet and user argument. Return true to send a reply. |
cb_arg | user data argument for callback function. |
References comm_point::cb_arg, comm_point_create_tcp(), comm_point_create_udp(), comm_point_create_udp_ancil(), comm_point_delete(), listen_dnsport::cps, comm_point::do_not_close, comm_point::dtenv, listen_port::fd, listen_port::ftype, listen_cp_insert(), listen_delete(), listen_type_ssl, listen_type_tcp, listen_type_tcp_dnscrypt, listen_type_udp, listen_type_udp_dnscrypt, listen_type_udpancil, listen_type_udpancil_dnscrypt, log_err(), listen_port::next, sldns_buffer_new(), comm_point::ssl, and listen_dnsport::udp_buff.
void listen_list_delete | ( | struct listen_list * | list | ) |
delete listen_list of commpoints.
Calls commpointdelete() on items. This may close the fds or not depending on flags.
list | to delete. |
References listen_list::com, comm_point_delete(), and listen_list::next.
Referenced by daemon_remote_clear(), and listen_delete().
void listen_delete | ( | struct listen_dnsport * | listen | ) |
delete the listening structure
listen | listening structure. |
Referenced by listen_create(), and worker_delete().
struct listen_port* listening_ports_open | ( | struct config_file * | cfg, |
int * | reuseport | ||
) |
Create shared listening ports Getaddrinfo, create socket, bind and listen to zero or more interfaces for IP4 and/or IP6, for UDP and/or TCP.
On the given port number. It creates the sockets.
cfg | settings on what ports to open. |
reuseport | set to true if you want reuseport, or NULL to not have it, set to false on exit if reuseport failed to apply (because of no kernel support). |
References config_file::dnscrypt_port, config_file::do_ip4, config_file::do_ip6, config_file::do_tcp, config_file::do_udp, config_file::if_automatic, config_file::ifs, config_file::incoming_num_tcp, config_file::ip_freebind, config_file::ip_transparent, listening_ports_free(), config_file::num_ifs, config_file::port, ports_create_if(), config_file::so_rcvbuf, config_file::so_sndbuf, config_file::ssl_port, str_is_ip6(), config_file::tcp_mss, and config_file::use_systemd.
Referenced by daemon_open_shared_ports().
size_t listen_get_mem | ( | struct listen_dnsport * | listen | ) |
get memory size used by the listening structs
listen | listening structure. |
References listen_dnsport::base, listen_dnsport::cps, listen_list::next, sldns_buffer_capacity(), and listen_dnsport::udp_buff.
void listen_stop_accept | ( | struct listen_dnsport * | listen | ) |
stop accept handlers for TCP (until enabled again)
listen | listening structure. |
References listen_list::com, listen_dnsport::cps, listen_list::next, comm_point::tcp_free, and comm_point::type.
Referenced by worker_stop_accept().
void listen_start_accept | ( | struct listen_dnsport * | listen | ) |
start accept handlers for TCP (was stopped before)
listen | listening structure. |
References listen_list::com, listen_dnsport::cps, listen_list::next, comm_point::tcp_free, and comm_point::type.
Referenced by worker_start_accept().