Mercurial > hg > nginx-quic
view src/stream/ngx_stream_handler.c @ 7353:87d2ea860f38
SSL: restore handlers after blocking.
It is possible that after SSL_read() will return SSL_ERROR_WANT_WRITE,
further calls will return SSL_ERROR_WANT_READ without reading any
application data. We have to call ngx_handle_write_event() and
switch back to normal write handling much like we do if there are some
application data, or the write there will be reported again and again.
Similarly, we have to switch back to normal read handling if there
is saved read handler and SSL_write() returns SSL_ERROR_WANT_WRITE.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 10 Sep 2018 18:57:39 +0300 |
parents | 3908156a51fa |
children | 893b3313f53c |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_stream.h> static void ngx_stream_log_session(ngx_stream_session_t *s); static void ngx_stream_close_connection(ngx_connection_t *c); static u_char *ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len); static void ngx_stream_proxy_protocol_handler(ngx_event_t *rev); void ngx_stream_init_connection(ngx_connection_t *c) { u_char text[NGX_SOCKADDR_STRLEN]; size_t len; ngx_uint_t i; ngx_time_t *tp; ngx_event_t *rev; struct sockaddr *sa; ngx_stream_port_t *port; struct sockaddr_in *sin; ngx_stream_in_addr_t *addr; ngx_stream_session_t *s; ngx_stream_addr_conf_t *addr_conf; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; ngx_stream_in6_addr_t *addr6; #endif ngx_stream_core_srv_conf_t *cscf; ngx_stream_core_main_conf_t *cmcf; /* find the server configuration for the address:port */ port = c->listening->servers; if (port->naddrs > 1) { /* * There are several addresses on this port and one of them * is the "*:port" wildcard so getsockname() is needed to determine * the server address. * * AcceptEx() and recvmsg() already gave this address. */ if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) { ngx_stream_close_connection(c); return; } sa = c->local_sockaddr; switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) sa; addr6 = port->addrs; /* the last address is "*" */ for (i = 0; i < port->naddrs - 1; i++) { if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) { break; } } addr_conf = &addr6[i].conf; break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) sa; addr = port->addrs; /* the last address is "*" */ for (i = 0; i < port->naddrs - 1; i++) { if (addr[i].addr == sin->sin_addr.s_addr) { break; } } addr_conf = &addr[i].conf; break; } } else { switch (c->local_sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: addr6 = port->addrs; addr_conf = &addr6[0].conf; break; #endif default: /* AF_INET */ addr = port->addrs; addr_conf = &addr[0].conf; break; } } s = ngx_pcalloc(c->pool, sizeof(ngx_stream_session_t)); if (s == NULL) { ngx_stream_close_connection(c); return; } s->signature = NGX_STREAM_MODULE; s->main_conf = addr_conf->ctx->main_conf; s->srv_conf = addr_conf->ctx->srv_conf; #if (NGX_STREAM_SSL) s->ssl = addr_conf->ssl; #endif if (c->buffer) { s->received += c->buffer->last - c->buffer->pos; } s->connection = c; c->data = s; cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); ngx_set_connection_log(c, cscf->error_log); len = ngx_sock_ntop(c->sockaddr, c->socklen, text, NGX_SOCKADDR_STRLEN, 1); ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%uA %sclient %*s connected to %V", c->number, c->type == SOCK_DGRAM ? "udp " : "", len, text, &addr_conf->addr_text); c->log->connection = c->number; c->log->handler = ngx_stream_log_error; c->log->data = s; c->log->action = "initializing session"; c->log_error = NGX_ERROR_INFO; s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_stream_max_module); if (s->ctx == NULL) { ngx_stream_close_connection(c); return; } cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); s->variables = ngx_pcalloc(s->connection->pool, cmcf->variables.nelts * sizeof(ngx_stream_variable_value_t)); if (s->variables == NULL) { ngx_stream_close_connection(c); return; } tp = ngx_timeofday(); s->start_sec = tp->sec; s->start_msec = tp->msec; rev = c->read; rev->handler = ngx_stream_session_handler; if (addr_conf->proxy_protocol) { c->log->action = "reading PROXY protocol"; rev->handler = ngx_stream_proxy_protocol_handler; if (!rev->ready) { ngx_add_timer(rev, cscf->proxy_protocol_timeout); if (ngx_handle_read_event(rev, 0) != NGX_OK) { ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); } return; } } if (ngx_use_accept_mutex) { ngx_post_event(rev, &ngx_posted_events); return; } rev->handler(rev); } static void ngx_stream_proxy_protocol_handler(ngx_event_t *rev) { u_char *p, buf[NGX_PROXY_PROTOCOL_MAX_HEADER]; size_t size; ssize_t n; ngx_err_t err; ngx_connection_t *c; ngx_stream_session_t *s; ngx_stream_core_srv_conf_t *cscf; c = rev->data; s = c->data; ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0, "stream PROXY protocol handler"); if (rev->timedout) { ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); ngx_stream_finalize_session(s, NGX_STREAM_OK); return; } n = recv(c->fd, (char *) buf, sizeof(buf), MSG_PEEK); err = ngx_socket_errno; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "recv(): %z", n); if (n == -1) { if (err == NGX_EAGAIN) { rev->ready = 0; if (!rev->timer_set) { cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); ngx_add_timer(rev, cscf->proxy_protocol_timeout); } if (ngx_handle_read_event(rev, 0) != NGX_OK) { ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); } return; } ngx_connection_error(c, err, "recv() failed"); ngx_stream_finalize_session(s, NGX_STREAM_OK); return; } if (rev->timer_set) { ngx_del_timer(rev); } p = ngx_proxy_protocol_read(c, buf, buf + n); if (p == NULL) { ngx_stream_finalize_session(s, NGX_STREAM_BAD_REQUEST); return; } size = p - buf; if (c->recv(c, buf, size) != (ssize_t) size) { ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); return; } c->log->action = "initializing session"; ngx_stream_session_handler(rev); } void ngx_stream_session_handler(ngx_event_t *rev) { ngx_connection_t *c; ngx_stream_session_t *s; c = rev->data; s = c->data; ngx_stream_core_run_phases(s); } void ngx_stream_finalize_session(ngx_stream_session_t *s, ngx_uint_t rc) { ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "finalize stream session: %i", rc); s->status = rc; ngx_stream_log_session(s); ngx_stream_close_connection(s->connection); } static void ngx_stream_log_session(ngx_stream_session_t *s) { ngx_uint_t i, n; ngx_stream_handler_pt *log_handler; ngx_stream_core_main_conf_t *cmcf; cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); log_handler = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.elts; n = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.nelts; for (i = 0; i < n; i++) { log_handler[i](s); } } static void ngx_stream_close_connection(ngx_connection_t *c) { ngx_pool_t *pool; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "close stream connection: %d", c->fd); #if (NGX_STREAM_SSL) if (c->ssl) { if (ngx_ssl_shutdown(c) == NGX_AGAIN) { c->ssl->handler = ngx_stream_close_connection; return; } } #endif #if (NGX_STAT_STUB) (void) ngx_atomic_fetch_add(ngx_stat_active, -1); #endif pool = c->pool; ngx_close_connection(c); ngx_destroy_pool(pool); } static u_char * ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len) { u_char *p; ngx_stream_session_t *s; if (log->action) { p = ngx_snprintf(buf, len, " while %s", log->action); len -= p - buf; buf = p; } s = log->data; p = ngx_snprintf(buf, len, ", %sclient: %V, server: %V", s->connection->type == SOCK_DGRAM ? "udp " : "", &s->connection->addr_text, &s->connection->listening->addr_text); len -= p - buf; buf = p; if (s->log_handler) { p = s->log_handler(log, buf, len); } return p; }