Fixed handling of non-null-terminated unix sockets. At least FreeBSD, macOS, NetBSD, and OpenBSD can return unix sockets with non-null-terminated sun_path. Additionally, the address may become non-null-terminated if it does not fit into the buffer provided and was truncated (may happen on macOS, NetBSD, and Solaris, which allow unix socket addresess larger than struct sockaddr_un). As such, ngx_sock_ntop() might overread the sockaddr provided, as it used "%s" format and thus assumed null-terminated string. To fix this, the ngx_strnlen() function was introduced, and it is now used to calculate correct length of sun_path.

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


#ifndef _NGX_FREEBSD_H_INCLUDED_
#define _NGX_FREEBSD_H_INCLUDED_


void ngx_debug_init(void);
ngx_chain_t *ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in,
    off_t limit);

extern int         ngx_freebsd_kern_osreldate;
extern int         ngx_freebsd_hw_ncpu;
extern u_long      ngx_freebsd_net_inet_tcp_sendspace;

extern ngx_uint_t  ngx_freebsd_sendfile_nbytes_bug;
extern ngx_uint_t  ngx_freebsd_use_tcp_nopush;
extern ngx_uint_t  ngx_debug_malloc;


#endif /* _NGX_FREEBSD_H_INCLUDED_ */