#include #include #include #include void ngx_event_accept(ngx_event_t *ev) { int instance; socklen_t len; struct sockaddr *sa; ngx_err_t err; ngx_pool_t *pool; ngx_socket_t s; ngx_event_t *rev, *wev; ngx_connection_t *c, *ls; ngx_event_conf_t *ecf; ecf = ngx_event_get_conf(ngx_event_core_module); ls = ev->data; ngx_log_debug(ev->log, "ngx_event_accept: accept ready: %d" _ ev->available); ev->ready = 0; do { /* * Create the pool before accept() to avoid copy the sockaddr. * Although accept() can fail it's an uncommon case * and the pool can be got from the free pool list */ pool = ngx_create_pool(ls->listening->pool_size, ev->log); if (pool == NULL) { return; } sa = ngx_palloc(pool, ls->listening->socklen); if (sa == NULL) { return; } len = ls->listening->socklen; ngx_log_debug(ev->log, "ADDR %s" _ ls->listening->addr_text.data); s = accept(ls->fd, sa, &len); if (s == -1) { err = ngx_socket_errno; if (err == NGX_EAGAIN) { ngx_log_error(NGX_LOG_NOTICE, ev->log, err, "EAGAIN while accept() %s", ls->listening->addr_text.data); return; } ngx_log_error(NGX_LOG_ALERT, ev->log, err, "accept() %s failed", ls->listening->addr_text.data); ngx_destroy_pool(pool); return; } /* disable warnings: Win32 SOCKET is u_int while UNIX socket is int */ if ((unsigned) s >= (unsigned) ecf->connections) { ngx_log_error(NGX_LOG_ALERT, ev->log, 0, "accept() %s returned socket #%d while " "only %d connections was configured, " "sleeping for 1 second", ls->listening->addr_text.data, s, ecf->connections); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls->listening->addr_text.data); } ngx_msleep(1000); ngx_destroy_pool(pool); return; } /* set a blocking mode for aio and non-blocking mode for others */ if (ngx_inherited_nonblocking) { if ((ngx_event_flags & NGX_USE_AIO_EVENT)) { if (ngx_blocking(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_blocking_n " %s failed", ls->listening->addr_text.data); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls->listening->addr_text.data); } ngx_destroy_pool(pool); return; } } } else { if ((ngx_event_flags & NGX_USE_AIO_EVENT) == 0) { if (ngx_nonblocking(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_nonblocking_n " %s failed", ls->listening->addr_text.data); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls->listening->addr_text.data); } ngx_destroy_pool(pool); return; } } } #if (WIN32) /* * Winsock assignes a socket number divisible by 4 * so to find a connection we divide a socket number by 4. */ if (s % 4) { ngx_log_error(NGX_LOG_EMERG, ls->log, 0, ngx_socket_n " created socket %d", s); exit(1); } rev = &ngx_read_events[s / 4]; wev = &ngx_write_events[s / 4]; c = &ngx_connections[s / 4]; #else rev = &ngx_read_events[s]; wev = &ngx_write_events[s]; c = &ngx_connections[s]; #endif instance = rev->instance; ngx_memzero(rev, sizeof(ngx_event_t)); ngx_memzero(wev, sizeof(ngx_event_t)); ngx_memzero(c, sizeof(ngx_connection_t)); c->pool = pool; c->listening = ls->listening; c->sockaddr = sa; c->socklen = len; rev->instance = wev->instance = !instance; rev->index = wev->index = NGX_INVALID_INDEX; rev->data = wev->data = c; c->read = rev; c->write = wev; c->fd = s; c->unexpected_eof = 1; wev->write = 1; if ((ngx_event_flags & NGX_USE_AIO_EVENT) == 0) { wev->ready = 1; } c->ctx = ls->ctx; c->servers = ls->servers; c->log = ngx_palloc(c->pool, sizeof(ngx_log_t)); if (c->log == NULL) { return; } ngx_memcpy(c->log, ev->log, sizeof(ngx_log_t)); rev->log = wev->log = c->log; /* TODO: x86: MT: lock xadd, MP: lock xadd, shared */ c->number = ngx_connection_counter++; ngx_log_debug(ev->log, "accept: %d, %d" _ s _ c->number); if (ev->deferred_accept) { rev->ready = 1; } if (ngx_add_conn) { if (ngx_add_conn(c) == NGX_ERROR) { if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, ngx_close_socket_n " %s failed", ls->listening->addr_text.data); } ngx_destroy_pool(pool); return; } } ls->listening->handler(c); if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { ev->available--; } } while (ev->available); return; }