SSL: disabled sending shutdown after ngx_http_test_reading(). Sending shutdown when ngx_http_test_reading() detects the connection is closed can result in "SSL_shutdown() failed (SSL: ... bad write retry)" critical log messages if there are blocked writes. Fix is to avoid sending shutdown via the c->ssl->no_send_shutdown flag, similarly to how it is done in ngx_http_keepalive_handler() for kqueue when pending EOF is detected. Reported by Jan Prachař (http://mailman.nginx.org/pipermail/nginx-devel/2018-December/011702.html).

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_MD5_H_INCLUDED_
#define _NGX_MD5_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef struct {
    uint64_t  bytes;
    uint32_t  a, b, c, d;
    u_char    buffer[64];
} ngx_md5_t;


void ngx_md5_init(ngx_md5_t *ctx);
void ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size);
void ngx_md5_final(u_char result[16], ngx_md5_t *ctx);


#endif /* _NGX_MD5_H_INCLUDED_ */