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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
ssize_t ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain)
{
int rc;
u_char *prev;
u_long bytes, flags;
size_t size;
WSABUF *wsabuf;
ngx_err_t err;
ngx_array_t io;
ngx_event_t *rev;
prev = NULL;
wsabuf = NULL;
flags = 0;
size = 0;
bytes = 0;
ngx_init_array(io, c->pool, 10, sizeof(WSABUF), NGX_ERROR);
/* coalesce the neighbouring bufs */
while (chain) {
if (prev == chain->buf->last) {
wsabuf->len += chain->buf->end - chain->buf->last;
} else {
ngx_test_null(wsabuf, ngx_push_array(&io), NGX_ERROR);
wsabuf->buf = (char *) chain->buf->last;
wsabuf->len = chain->buf->end - chain->buf->last;
}
size += chain->buf->end - chain->buf->last;
prev = chain->buf->end;
chain = chain->next;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"WSARecv: %d:%d", io.nelts, wsabuf->len);
rc = WSARecv(c->fd, io.elts, io.nelts, &bytes, &flags, NULL, NULL);
rev = c->read;
if (rc == -1) {
rev->ready = 0;
err = ngx_socket_errno;
if (err == WSAEWOULDBLOCK) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"WSARecv() not ready");
return NGX_AGAIN;
}
rev->error = 1;
ngx_connection_error(c, err, "WSARecv() failed");
return NGX_ERROR;
}
if (bytes < size) {
rev->ready = 0;
}
if (bytes == 0) {
rev->eof = 1;
}
return bytes;
}
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