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Add isc_nm_streamdnssocket (aka Stream DNS)

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This commit adds an initial implementation of isc_nm_streamdnssocket
transport: a unified transport for DNS over stream protocols messages,
which is capable of replacing both TCP DNS and TLS DNS
transports. Currently, the interface it provides is a unified set of
interfaces provided by both of the transports it attempts to replace.

The transport is built around "isc_dnsbuffer_t" and
"isc_dnsstream_assembler_t" objects and attempts to minimise both the
number of memory allocations during network transfers as well as
memory usage.
This commit is contained in:
Artem Boldariev
2022-06-20 20:30:12 +03:00
parent ae63471e50
commit f395cd4b3e
6 changed files with 1388 additions and 2 deletions
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100
lib/isc/netmgr/netmgr-int.h
View File

@@ -23,6 +23,7 @@
#include <isc/barrier.h>
#include <isc/buffer.h>
#include <isc/condition.h>
#include <isc/dnsstream.h>
#include <isc/magic.h>
#include <isc/mem.h>
#include <isc/netmgr.h>
@@ -281,6 +282,11 @@ typedef enum isc__netievent_type {
netievent_httpsend,
netievent_httpendpoints,
netievent_streamdnsclose,
netievent_streamdnssend,
netievent_streamdnsread,
netievent_streamdnscancel,
netievent_connectcb,
netievent_readcb,
netievent_sendcb,
@@ -922,6 +928,17 @@ struct isc_nmsocket {
isc_nmsocket_h2_t h2;
#endif /* HAVE_LIBNGHTTP2 */
struct {
isc_dnsstream_assembler_t *input;
bool reading;
isc_nmsocket_t *listener;
isc_nmsocket_t *sock;
size_t nsending;
void *send_req;
bool dot_alpn_negotiated;
const char *tls_verify_error;
} streamdns;
/*%
* quota is the TCP client, attached when a TCP connection
* is established. pquota is a non-attached pointer to the
@@ -1702,6 +1719,79 @@ isc__nm_http_set_max_streams(isc_nmsocket_t *listener,
#endif
void
isc__nm_async_streamdnsread(isc__networker_t *worker, isc__netievent_t *ev0);
void
isc__nm_streamdns_read(isc_nmhandle_t *handle, isc_nm_recv_cb_t cb,
void *cbarg);
void
isc__nm_async_streamdnssend(isc__networker_t *worker, isc__netievent_t *ev0);
void
isc__nm_streamdns_send(isc_nmhandle_t *handle, const isc_region_t *region,
isc_nm_cb_t cb, void *cbarg);
void
isc__nm_async_streamdnsclose(isc__networker_t *worker, isc__netievent_t *ev0);
void
isc__nm_streamdns_close(isc_nmsocket_t *sock);
void
isc__nm_streamdns_stoplistening(isc_nmsocket_t *sock);
void
isc__nm_streamdns_cleanup_data(isc_nmsocket_t *sock);
void
isc__nm_async_streamdnscancel(isc__networker_t *worker, isc__netievent_t *ev0);
void
isc__nm_streamdns_cancelread(isc_nmhandle_t *handle);
void
isc__nmhandle_streamdns_cleartimeout(isc_nmhandle_t *handle);
void
isc__nmhandle_streamdns_settimeout(isc_nmhandle_t *handle, uint32_t timeout);
void
isc__nmhandle_streamdns_keepalive(isc_nmhandle_t *handle, bool value);
void
isc__nmhandle_streamdns_setwritetimeout(isc_nmhandle_t *handle,
uint32_t timeout);
bool
isc__nm_streamdns_has_encryption(const isc_nmhandle_t *handle);
const char *
isc__nm_streamdns_verify_tls_peer_result_string(const isc_nmhandle_t *handle);
void
isc__nm_streamdns_set_tlsctx(isc_nmsocket_t *listener, isc_tlsctx_t *tlsctx);
bool
isc__nm_streamdns_xfr_allowed(isc_nmsocket_t *sock);
void
isc__nmsocket_streamdns_reset(isc_nmsocket_t *sock);
bool
isc__nmsocket_streamdns_timer_running(isc_nmsocket_t *sock);
void
isc__nmsocket_streamdns_timer_stop(isc_nmsocket_t *sock);
void
isc__nmsocket_streamdns_timer_restart(isc_nmsocket_t *sock);
void
isc__nm_streamdns_failed_read_cb(isc_nmsocket_t *sock, isc_result_t result,
bool async);
void
isc__nm_async_settlsctx(isc__networker_t *worker, isc__netievent_t *ev0);
@@ -1865,6 +1955,11 @@ NETIEVENT_SOCKET_HANDLE_TYPE(udpcancel);
NETIEVENT_SOCKET_QUOTA_TYPE(tcpaccept);
NETIEVENT_SOCKET_TYPE(streamdnsclose);
NETIEVENT_SOCKET_REQ_TYPE(streamdnssend);
NETIEVENT_SOCKET_TYPE(streamdnsread);
NETIEVENT_SOCKET_HANDLE_TYPE(streamdnscancel);
NETIEVENT_SOCKET_TLSCTX_TYPE(settlsctx);
NETIEVENT_SOCKET_TYPE(sockstop);
@@ -1915,6 +2010,11 @@ NETIEVENT_SOCKET_DECL(detach);
NETIEVENT_SOCKET_QUOTA_DECL(tcpaccept);
NETIEVENT_SOCKET_DECL(streamdnsclose);
NETIEVENT_SOCKET_REQ_DECL(streamdnssend);
NETIEVENT_SOCKET_DECL(streamdnsread);
NETIEVENT_SOCKET_HANDLE_DECL(streamdnscancel);
NETIEVENT_SOCKET_TLSCTX_DECL(settlsctx);
NETIEVENT_SOCKET_DECL(sockstop);