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src/event/quic/ngx_event_quic_udp.c - nginx source code
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #include <ngx_event_quic_connection.h>
- static void ngx_quic_close_accepted_connection(ngx_connection_t *c);
- static ngx_connection_t *ngx_quic_lookup_connection(ngx_listening_t *ls,
- ngx_str_t *key, struct sockaddr *local_sockaddr, socklen_t local_socklen);
- void
- ngx_quic_recvmsg(ngx_event_t *ev)
- {
- ssize_t n;
- ngx_str_t key;
- ngx_buf_t buf;
- ngx_log_t *log;
- ngx_err_t err;
- socklen_t socklen, local_socklen;
- ngx_event_t *rev, *wev;
- struct iovec iov[1];
- struct msghdr msg;
- ngx_sockaddr_t sa, lsa;
- struct sockaddr *sockaddr, *local_sockaddr;
- ngx_listening_t *ls;
- ngx_event_conf_t *ecf;
- ngx_connection_t *c, *lc;
- ngx_quic_socket_t *qsock;
- static u_char buffer[NGX_QUIC_MAX_UDP_PAYLOAD_SIZE];
- #if (NGX_HAVE_ADDRINFO_CMSG)
- u_char msg_control[CMSG_SPACE(sizeof(ngx_addrinfo_t))];
- #endif
- if (ev->timedout) {
- if (ngx_enable_accept_events((ngx_cycle_t *) ngx_cycle) != NGX_OK) {
- return;
- }
- ev->timedout = 0;
- }
- ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module);
- if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) {
- ev->available = ecf->multi_accept;
- }
- lc = ev->data;
- ls = lc->listening;
- ev->ready = 0;
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
- "quic recvmsg on %V, ready: %d",
- &ls->addr_text, ev->available);
- do {
- ngx_memzero(&msg, sizeof(struct msghdr));
- iov[0].iov_base = (void *) buffer;
- iov[0].iov_len = sizeof(buffer);
- msg.msg_name = &sa;
- msg.msg_namelen = sizeof(ngx_sockaddr_t);
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
- #if (NGX_HAVE_ADDRINFO_CMSG)
- if (ls->wildcard) {
- msg.msg_control = &msg_control;
- msg.msg_controllen = sizeof(msg_control);
- ngx_memzero(&msg_control, sizeof(msg_control));
- }
- #endif
- n = recvmsg(lc->fd, &msg, 0);
- if (n == -1) {
- err = ngx_socket_errno;
- if (err == NGX_EAGAIN) {
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, err,
- "quic recvmsg() not ready");
- return;
- }
- ngx_log_error(NGX_LOG_ALERT, ev->log, err, "quic recvmsg() failed");
- return;
- }
- #if (NGX_HAVE_ADDRINFO_CMSG)
- if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) {
- ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
- "quic recvmsg() truncated data");
- continue;
- }
- #endif
- sockaddr = msg.msg_name;
- socklen = msg.msg_namelen;
- if (socklen > (socklen_t) sizeof(ngx_sockaddr_t)) {
- socklen = sizeof(ngx_sockaddr_t);
- }
- #if (NGX_HAVE_UNIX_DOMAIN)
- if (sockaddr->sa_family == AF_UNIX) {
- struct sockaddr_un *saun = (struct sockaddr_un *) sockaddr;
- if (socklen <= (socklen_t) offsetof(struct sockaddr_un, sun_path)
- || saun->sun_path[0] == '\0')
- {
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0,
- "unbound unix socket");
- goto next;
- }
- }
- #endif
- local_sockaddr = ls->sockaddr;
- local_socklen = ls->socklen;
- #if (NGX_HAVE_ADDRINFO_CMSG)
- if (ls->wildcard) {
- struct cmsghdr *cmsg;
- ngx_memcpy(&lsa, local_sockaddr, local_socklen);
- local_sockaddr = &lsa.sockaddr;
- for (cmsg = CMSG_FIRSTHDR(&msg);
- cmsg != NULL;
- cmsg = CMSG_NXTHDR(&msg, cmsg))
- {
- if (ngx_get_srcaddr_cmsg(cmsg, local_sockaddr) == NGX_OK) {
- break;
- }
- }
- }
- #endif
- if (ngx_quic_get_packet_dcid(ev->log, buffer, n, &key) != NGX_OK) {
- goto next;
- }
- c = ngx_quic_lookup_connection(ls, &key, local_sockaddr, local_socklen);
- if (c) {
- #if (NGX_DEBUG)
- if (c->log->log_level & NGX_LOG_DEBUG_EVENT) {
- ngx_log_handler_pt handler;
- handler = c->log->handler;
- c->log->handler = NULL;
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic recvmsg: fd:%d n:%z", c->fd, n);
- c->log->handler = handler;
- }
- #endif
- ngx_memzero(&buf, sizeof(ngx_buf_t));
- buf.pos = buffer;
- buf.last = buffer + n;
- buf.start = buf.pos;
- buf.end = buffer + sizeof(buffer);
- qsock = ngx_quic_get_socket(c);
- ngx_memcpy(&qsock->sockaddr, sockaddr, socklen);
- qsock->socklen = socklen;
- c->udp->buffer = &buf;
- rev = c->read;
- rev->ready = 1;
- rev->active = 0;
- rev->handler(rev);
- if (c->udp) {
- c->udp->buffer = NULL;
- }
- rev->ready = 0;
- rev->active = 1;
- goto next;
- }
- #if (NGX_STAT_STUB)
- (void) ngx_atomic_fetch_add(ngx_stat_accepted, 1);
- #endif
- ngx_accept_disabled = ngx_cycle->connection_n / 8
- - ngx_cycle->free_connection_n;
- c = ngx_get_connection(lc->fd, ev->log);
- if (c == NULL) {
- return;
- }
- c->shared = 1;
- c->type = SOCK_DGRAM;
- c->socklen = socklen;
- #if (NGX_STAT_STUB)
- (void) ngx_atomic_fetch_add(ngx_stat_active, 1);
- #endif
- c->pool = ngx_create_pool(ls->pool_size, ev->log);
- if (c->pool == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- c->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN);
- if (c->sockaddr == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- ngx_memcpy(c->sockaddr, sockaddr, socklen);
- log = ngx_palloc(c->pool, sizeof(ngx_log_t));
- if (log == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- *log = ls->log;
- c->log = log;
- c->pool->log = log;
- c->listening = ls;
- if (local_sockaddr == &lsa.sockaddr) {
- local_sockaddr = ngx_palloc(c->pool, local_socklen);
- if (local_sockaddr == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- ngx_memcpy(local_sockaddr, &lsa, local_socklen);
- }
- c->local_sockaddr = local_sockaddr;
- c->local_socklen = local_socklen;
- c->buffer = ngx_create_temp_buf(c->pool, n);
- if (c->buffer == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- c->buffer->last = ngx_cpymem(c->buffer->last, buffer, n);
- rev = c->read;
- wev = c->write;
- rev->active = 1;
- wev->ready = 1;
- rev->log = log;
- wev->log = log;
-
- TODO
- TODO
- c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
- c->start_time = ngx_current_msec;
- #if (NGX_STAT_STUB)
- (void) ngx_atomic_fetch_add(ngx_stat_handled, 1);
- #endif
- if (ls->addr_ntop) {
- c->addr_text.data = ngx_pnalloc(c->pool, ls->addr_text_max_len);
- if (c->addr_text.data == NULL) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen,
- c->addr_text.data,
- ls->addr_text_max_len, 0);
- if (c->addr_text.len == 0) {
- ngx_quic_close_accepted_connection(c);
- return;
- }
- }
- #if (NGX_DEBUG)
- {
- ngx_str_t addr;
- u_char text[NGX_SOCKADDR_STRLEN];
- ngx_debug_accepted_connection(ecf, c);
- if (log->log_level & NGX_LOG_DEBUG_EVENT) {
- addr.data = text;
- addr.len = ngx_sock_ntop(c->sockaddr, c->socklen, text,
- NGX_SOCKADDR_STRLEN, 1);
- ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0,
- "*%uA quic recvmsg: %V fd:%d n:%z",
- c->number, &addr, c->fd, n);
- }
- }
- #endif
- log->data = NULL;
- log->handler = NULL;
- ls->handler(c);
- next:
- if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
- ev->available -= n;
- }
- } while (ev->available);
- }
- static void
- ngx_quic_close_accepted_connection(ngx_connection_t *c)
- {
- ngx_free_connection(c);
- c->fd = (ngx_socket_t) -1;
- if (c->pool) {
- ngx_destroy_pool(c->pool);
- }
- #if (NGX_STAT_STUB)
- (void) ngx_atomic_fetch_add(ngx_stat_active, -1);
- #endif
- }
- static ngx_connection_t *
- ngx_quic_lookup_connection(ngx_listening_t *ls, ngx_str_t *key,
- struct sockaddr *local_sockaddr, socklen_t local_socklen)
- {
- uint32_t hash;
- ngx_int_t rc;
- ngx_connection_t *c;
- ngx_rbtree_node_t *node, *sentinel;
- ngx_quic_socket_t *qsock;
- if (key->len == 0) {
- return NULL;
- }
- node = ls->rbtree.root;
- sentinel = ls->rbtree.sentinel;
- hash = ngx_crc32_long(key->data, key->len);
- while (node != sentinel) {
- if (hash < node->key) {
- node = node->left;
- continue;
- }
- if (hash > node->key) {
- node = node->right;
- continue;
- }
-
- qsock = (ngx_quic_socket_t *) node;
- rc = ngx_memn2cmp(key->data, qsock->sid.id, key->len, qsock->sid.len);
- c = qsock->udp.connection;
- if (rc == 0 && ls->wildcard) {
- rc = ngx_cmp_sockaddr(local_sockaddr, local_socklen,
- c->local_sockaddr, c->local_socklen, 1);
- }
- if (rc == 0) {
- c->udp = &qsock->udp;
- return c;
- }
- node = (rc < 0) ? node->left : node->right;
- }
- return NULL;
- }
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