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src/os/win32/ngx_wsasend_chain.c - nginx source code
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #define NGX_WSABUFS 64
- ngx_chain_t *
- ngx_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
- {
- int rc;
- u_char *prev;
- u_long size, sent, send, prev_send;
- ngx_err_t err;
- ngx_event_t *wev;
- ngx_array_t vec;
- ngx_chain_t *cl;
- LPWSABUF wsabuf;
- WSABUF wsabufs[NGX_WSABUFS];
- wev = c->write;
- if (!wev->ready) {
- return in;
- }
-
- if (limit == 0 || limit > (off_t) (NGX_MAX_UINT32_VALUE - ngx_pagesize)) {
- limit = NGX_MAX_UINT32_VALUE - ngx_pagesize;
- }
- send = 0;
-
- vec.elts = wsabufs;
- vec.size = sizeof(WSABUF);
- vec.nalloc = ngx_min(NGX_WSABUFS, ngx_max_wsabufs);
- vec.pool = c->pool;
- for ( ;; ) {
- prev = NULL;
- wsabuf = NULL;
- prev_send = send;
- vec.nelts = 0;
-
- for (cl = in; cl && send < limit; cl = cl->next) {
- if (ngx_buf_special(cl->buf)) {
- continue;
- }
- size = cl->buf->last - cl->buf->pos;
- if (send + size > limit) {
- size = (u_long) (limit - send);
- }
- if (prev == cl->buf->pos) {
- wsabuf->len += cl->buf->last - cl->buf->pos;
- } else {
- if (vec.nelts == vec.nalloc) {
- break;
- }
- wsabuf = ngx_array_push(&vec);
- if (wsabuf == NULL) {
- return NGX_CHAIN_ERROR;
- }
- wsabuf->buf = (char *) cl->buf->pos;
- wsabuf->len = cl->buf->last - cl->buf->pos;
- }
- prev = cl->buf->last;
- send += size;
- }
- sent = 0;
- rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, NULL, NULL);
- if (rc == -1) {
- err = ngx_errno;
- if (err == WSAEWOULDBLOCK) {
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
- "WSASend() not ready");
- } else {
- wev->error = 1;
- ngx_connection_error(c, err, "WSASend() failed");
- return NGX_CHAIN_ERROR;
- }
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "WSASend: fd:%d, s:%ul", c->fd, sent);
- c->sent += sent;
- in = ngx_chain_update_sent(in, sent);
- if (send - prev_send != sent) {
- wev->ready = 0;
- return in;
- }
- if (send >= limit || in == NULL) {
- return in;
- }
- }
- }
- ngx_chain_t *
- ngx_overlapped_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
- {
- int rc;
- u_char *prev;
- u_long size, send, sent;
- ngx_err_t err;
- ngx_event_t *wev;
- ngx_array_t vec;
- ngx_chain_t *cl;
- LPWSAOVERLAPPED ovlp;
- LPWSABUF wsabuf;
- WSABUF wsabufs[NGX_WSABUFS];
- wev = c->write;
- if (!wev->ready) {
- return in;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "wev->complete: %d", wev->complete);
- if (!wev->complete) {
-
-
- if (limit == 0 || limit > (off_t) (NGX_MAX_UINT32_VALUE - ngx_pagesize))
- {
- limit = NGX_MAX_UINT32_VALUE - ngx_pagesize;
- }
-
- vec.elts = wsabufs;
- vec.nelts = 0;
- vec.size = sizeof(WSABUF);
- vec.nalloc = ngx_min(NGX_WSABUFS, ngx_max_wsabufs);
- vec.pool = c->pool;
- send = 0;
- prev = NULL;
- wsabuf = NULL;
-
- for (cl = in; cl && send < limit; cl = cl->next) {
- if (ngx_buf_special(cl->buf)) {
- continue;
- }
- size = cl->buf->last - cl->buf->pos;
- if (send + size > limit) {
- size = (u_long) (limit - send);
- }
- if (prev == cl->buf->pos) {
- wsabuf->len += cl->buf->last - cl->buf->pos;
- } else {
- if (vec.nelts == vec.nalloc) {
- break;
- }
- wsabuf = ngx_array_push(&vec);
- if (wsabuf == NULL) {
- return NGX_CHAIN_ERROR;
- }
- wsabuf->buf = (char *) cl->buf->pos;
- wsabuf->len = cl->buf->last - cl->buf->pos;
- }
- prev = cl->buf->last;
- send += size;
- }
- ovlp = (LPWSAOVERLAPPED) &c->write->ovlp;
- ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
- rc = WSASend(c->fd, vec.elts, vec.nelts, &sent, 0, ovlp, NULL);
- wev->complete = 0;
- if (rc == -1) {
- err = ngx_errno;
- if (err == WSA_IO_PENDING) {
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
- "WSASend() posted");
- wev->active = 1;
- return in;
- } else {
- wev->error = 1;
- ngx_connection_error(c, err, "WSASend() failed");
- return NGX_CHAIN_ERROR;
- }
- } else if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
-
- wev->active = 1;
- return in;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "WSASend: fd:%d, s:%ul", c->fd, sent);
- } else {
-
- wev->complete = 0;
- wev->active = 0;
- if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
- if (wev->ovlp.error) {
- ngx_connection_error(c, wev->ovlp.error, "WSASend() failed");
- return NGX_CHAIN_ERROR;
- }
- sent = wev->available;
- } else {
- if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp,
- &sent, 0, NULL)
- == 0)
- {
- ngx_connection_error(c, ngx_socket_errno,
- "WSASend() or WSAGetOverlappedResult() failed");
- return NGX_CHAIN_ERROR;
- }
- }
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "WSASend ovlp: fd:%d, s:%ul", c->fd, sent);
- c->sent += sent;
- in = ngx_chain_update_sent(in, sent);
- if (in) {
- wev->ready = 0;
- } else {
- wev->ready = 1;
- }
- return in;
- }
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