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/*
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_event_quic_connection.h>
ngx_int_t
ngx_quic_open_sockets(ngx_connection_t *c, ngx_quic_connection_t *qc,
ngx_quic_header_t *pkt)
{
ngx_quic_socket_t *qsock, *tmp;
ngx_quic_client_id_t *cid;
/*
* qc->path = NULL
*
* qc->nclient_ids = 0
* qc->nsockets = 0
* qc->max_retired_seqnum = 0
* qc->client_seqnum = 0
*/
ngx_queue_init(&qc->sockets);
ngx_queue_init(&qc->free_sockets);
ngx_queue_init(&qc->paths);
ngx_queue_init(&qc->free_paths);
ngx_queue_init(&qc->client_ids);
ngx_queue_init(&qc->free_client_ids);
qc->tp.original_dcid.len = pkt->odcid.len;
qc->tp.original_dcid.data = ngx_pstrdup(c->pool, &pkt->odcid);
if (qc->tp.original_dcid.data == NULL) {
return NGX_ERROR;
}
/* socket to use for further processing (id auto-generated) */
qsock = ngx_quic_create_socket(c, qc);
if (qsock == NULL) {
return NGX_ERROR;
}
/* socket is listening at new server id */
if (ngx_quic_listen(c, qc, qsock) != NGX_OK) {
return NGX_ERROR;
}
qsock->used = 1;
qc->tp.initial_scid.len = qsock->sid.len;
qc->tp.initial_scid.data = ngx_pnalloc(c->pool, qsock->sid.len);
if (qc->tp.initial_scid.data == NULL) {
goto failed;
}
ngx_memcpy(qc->tp.initial_scid.data, qsock->sid.id, qsock->sid.len);
/* for all packets except first, this is set at udp layer */
c->udp = &qsock->udp;
/* ngx_quic_get_connection(c) macro is now usable */
/* we have a client identified by scid */
cid = ngx_quic_create_client_id(c, &pkt->scid, 0, NULL);
if (cid == NULL) {
goto failed;
}
/* path of the first packet is our initial active path */
qc->path = ngx_quic_new_path(c, c->sockaddr, c->socklen, cid);
if (qc->path == NULL) {
goto failed;
}
qc->path->tag = NGX_QUIC_PATH_ACTIVE;
if (pkt->validated) {
qc->path->validated = 1;
qc->path->limited = 0;
}
ngx_quic_path_dbg(c, "set active", qc->path);
tmp = ngx_pcalloc(c->pool, sizeof(ngx_quic_socket_t));
if (tmp == NULL) {
goto failed;
}
tmp->sid.seqnum = NGX_QUIC_UNSET_PN; /* temporary socket */
ngx_memcpy(tmp->sid.id, pkt->odcid.data, pkt->odcid.len);
tmp->sid.len = pkt->odcid.len;
if (ngx_quic_listen(c, qc, tmp) != NGX_OK) {
goto failed;
}
return NGX_OK;
failed:
ngx_rbtree_delete(&c->listening->rbtree, &qsock->udp.node);
c->udp = NULL;
return NGX_ERROR;
}
ngx_quic_socket_t *
ngx_quic_create_socket(ngx_connection_t *c, ngx_quic_connection_t *qc)
{
ngx_queue_t *q;
ngx_quic_socket_t *sock;
if (!ngx_queue_empty(&qc->free_sockets)) {
q = ngx_queue_head(&qc->free_sockets);
sock = ngx_queue_data(q, ngx_quic_socket_t, queue);
ngx_queue_remove(&sock->queue);
ngx_memzero(sock, sizeof(ngx_quic_socket_t));
} else {
sock = ngx_pcalloc(c->pool, sizeof(ngx_quic_socket_t));
if (sock == NULL) {
return NULL;
}
}
sock->sid.len = NGX_QUIC_SERVER_CID_LEN;
if (ngx_quic_create_server_id(c, sock->sid.id) != NGX_OK) {
return NULL;
}
sock->sid.seqnum = qc->server_seqnum++;
return sock;
}
void
ngx_quic_close_socket(ngx_connection_t *c, ngx_quic_socket_t *qsock)
{
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
ngx_queue_remove(&qsock->queue);
ngx_queue_insert_head(&qc->free_sockets, &qsock->queue);
ngx_rbtree_delete(&c->listening->rbtree, &qsock->udp.node);
qc->nsockets--;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic socket seq:%L closed nsock:%ui",
(int64_t) qsock->sid.seqnum, qc->nsockets);
}
ngx_int_t
ngx_quic_listen(ngx_connection_t *c, ngx_quic_connection_t *qc,
ngx_quic_socket_t *qsock)
{
ngx_str_t id;
ngx_quic_server_id_t *sid;
sid = &qsock->sid;
id.data = sid->id;
id.len = sid->len;
qsock->udp.connection = c;
qsock->udp.node.key = ngx_crc32_long(id.data, id.len);
qsock->udp.key = id;
ngx_rbtree_insert(&c->listening->rbtree, &qsock->udp.node);
ngx_queue_insert_tail(&qc->sockets, &qsock->queue);
qc->nsockets++;
qsock->quic = qc;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic socket seq:%L listening at sid:%xV nsock:%ui",
(int64_t) sid->seqnum, &id, qc->nsockets);
return NGX_OK;
}
void
ngx_quic_close_sockets(ngx_connection_t *c)
{
ngx_queue_t *q;
ngx_quic_socket_t *qsock;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
while (!ngx_queue_empty(&qc->sockets)) {
q = ngx_queue_head(&qc->sockets);
qsock = ngx_queue_data(q, ngx_quic_socket_t, queue);
ngx_quic_close_socket(c, qsock);
}
}
ngx_quic_socket_t *
ngx_quic_find_socket(ngx_connection_t *c, uint64_t seqnum)
{
ngx_queue_t *q;
ngx_quic_socket_t *qsock;
ngx_quic_connection_t *qc;
qc = ngx_quic_get_connection(c);
for (q = ngx_queue_head(&qc->sockets);
q != ngx_queue_sentinel(&qc->sockets);
q = ngx_queue_next(q))
{
qsock = ngx_queue_data(q, ngx_quic_socket_t, queue);
if (qsock->sid.seqnum == seqnum) {
return qsock;
}
}
return NULL;
}
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