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/***************************************************************************
* sockaddr_u.h -- a union containing sockaddr types compatible with C99 *
* strict-aliasing rules. *
***********************IMPORTANT NMAP LICENSE TERMS************************
*
* The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap
* Project"). Nmap is also a registered trademark of the Nmap Project.
*
* This program is distributed under the terms of the Nmap Public Source
* License (NPSL). The exact license text applying to a particular Nmap
* release or source code control revision is contained in the LICENSE
* file distributed with that version of Nmap or source code control
* revision. More Nmap copyright/legal information is available from
* https://nmap.org/book/man-legal.html, and further information on the
* NPSL license itself can be found at https://nmap.org/npsl/ . This
* header summarizes some key points from the Nmap license, but is no
* substitute for the actual license text.
*
* Nmap is generally free for end users to download and use themselves,
* including commercial use. It is available from https://nmap.org.
*
* The Nmap license generally prohibits companies from using and
* redistributing Nmap in commercial products, but we sell a special Nmap
* OEM Edition with a more permissive license and special features for
* this purpose. See https://nmap.org/oem/
*
* If you have received a written Nmap license agreement or contract
* stating terms other than these (such as an Nmap OEM license), you may
* choose to use and redistribute Nmap under those terms instead.
*
* The official Nmap Windows builds include the Npcap software
* (https://npcap.com) for packet capture and transmission. It is under
* separate license terms which forbid redistribution without special
* permission. So the official Nmap Windows builds may not be redistributed
* without special permission (such as an Nmap OEM license).
*
* Source is provided to this software because we believe users have a
* right to know exactly what a program is going to do before they run it.
* This also allows you to audit the software for security holes.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and add
* new features. You are highly encouraged to submit your changes as a Github PR
* or by email to the dev@nmap.org mailing list for possible incorporation into
* the main distribution. Unless you specify otherwise, it is understood that
* you are offering us very broad rights to use your submissions as described in
* the Nmap Public Source License Contributor Agreement. This is important
* because we fund the project by selling licenses with various terms, and also
* because the inability to relicense code has caused devastating problems for
* other Free Software projects (such as KDE and NASM).
*
* The free version of Nmap is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties,
* indemnification and commercial support are all available through the
* Npcap OEM program--see https://nmap.org/oem/
*
***************************************************************************/
/* $Id:$ */
#include "ncat_config.h"
#ifndef SOCKADDR_U_H_
#define SOCKADDR_U_H_
#ifdef WIN32
# include <ws2def.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_SYS_UN_H
# include <sys/un.h>
#endif
#if HAVE_LINUX_VM_SOCKETS_H
#include <linux/vm_sockets.h>
#endif
union sockaddr_u {
struct sockaddr_storage storage;
#ifdef HAVE_SYS_UN_H
struct sockaddr_un un;
#endif
#ifdef HAVE_LINUX_VM_SOCKETS_H
struct sockaddr_vm vm;
#endif
struct sockaddr_in in;
struct sockaddr_in6 in6;
struct sockaddr sockaddr;
};
static inline socklen_t get_socklen(const union sockaddr_u *s)
{
switch(s->storage.ss_family) {
#ifdef HAVE_SYS_UN_H
case AF_UNIX:
return SUN_LEN(&s->un);
break;
#endif
#ifdef HAVE_LINUX_VM_SOCKETS_H
case AF_VSOCK:
return sizeof(struct sockaddr_vm);
break;
#endif
#ifdef HAVE_SOCKADDR_SA_LEN
default:
return s->sockaddr.sa_len;
break;
#else
case AF_INET:
return sizeof(struct sockaddr_in);
break;
#ifdef AF_INET6
case AF_INET6:
return sizeof(struct sockaddr_in6);
break;
#endif
default:
return sizeof(union sockaddr_u);
break;
#endif
}
return 0;
}
#endif
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