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nuttx/include/netinet/in.h
Michael Jung 4f27140331 include/netinet/in.h: Rename __pad member to sin_zero in struct sockaddr_in. 
Libwebsockets initializes the 'sin_zero' member of sockaddr_in objects to zeros.
Apparently, judging from mailing list entries, there are platforms on which incliinclunot
doing this causes undefined behaviour.

On NuttX compiling respective code is broken, as the corresponding member
variable is called '__pad'.  Neither in the 'nuttx' nor in the 'apps'
respository did I find any reference to this identifier.  Thus, I believe its a
safe bet to just rename it.

UNIX Network Programming states in this regard:

"The POSIX specification requires only three members in the structure: sin_family,
sin_addr, and sin_port. It is acceptable for a POSIX-compliant implementation to
define additional structure members, and this is normal for an Internet socket
address structure. Almost all implementations add the sin_zero member so that all
socket address structures are at least 16 bytes in size."
2019-07-29 08:25:35 -06:00

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/****************************************************************************
* include/netinet/in.h
*
* Copyright (C) 2007, 2009-2010, 2017-2018 Gregory Nutt. All rights
* reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_NETINET_IN_H
#define __INCLUDE_NETINET_IN_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Values for protocol argument to socket() */
#define IPPROTO_IP 0 /* Default protocol */
#define IPPROTO_HOPOPTS 0 /* IPv6 Hop-by-Hop options. */
#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
#define IPPROTO_IGMP 2 /* Internet Group Management Protocol */
#define IPPROTO_IPIP 4 /* IPIP tunnels (older KA9Q tunnels use 94) */
#define IPPROTO_TCP 6 /* Transmission Control Protocol */
#define IPPROTO_EGP 8 /* Exterior Gateway Protocol */
#define IPPROTO_PUP 12 /* PUP protocol */
#define IPPROTO_UDP 17 /* User Datagram Protocol */
#define IPPROTO_IDP 22 /* XNS IDP protocol */
#define IPPROTO_TP 29 /* SO Transport Protocol Class 4. */
#define IPPROTO_DCCP 33 /* Datagram Congestion Control Protocol */
#define IPPROTO_IPV6 41 /* IPv6-in-IPv4 tunnelling */
#define IPPROTO_ROUTING 43 /* IPv6 routing header. */
#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header. */
#define IPPROTO_RSVP 46 /* Reservation Protocol. */
#define IPPROTO_GRE 47 /* General Routing Encapsulation. */
#define IPPROTO_ESP 50 /* Encapsulation Security Payload protocol */
#define IPPROTO_AH 51 /* Authentication Header protocol */
#define IPPROTO_ICMP6 58 /* Internal Control Message Protocol v6 */
#define IPPROTO_NONE 59 /* IPv6 no next header. */
#define IPPROTO_DSTOPTS 60 /* IPv6 destination options. */
#define IPPROTO_MTP 92 /* Multicast Transport Protocol. */
#define IPPROTO_ENCAP 98 /* Encapsulation Header. */
#define IPPROTO_BEETPH 94 /* IP option pseudo header for BEET */
#define IPPROTO_PIM 103 /* Protocol Independent Multicast */
#define IPPROTO_COMP 108 /* Compression Header protocol */
#define IPPROTO_SCTP 132 /* Stream Control Transport Protocol */
#define IPPROTO_UDPLITE 136 /* UDP-Lite (RFC 3828) */
#define IPPROTO_MPLS 137 /* MPLS in IP (RFC 4023) */
#define IPPROTO_RAW 255 /* Raw IP packets */
/* SOL_IP protocol-level socket options. */
#define IP_MULTICAST_IF (__SO_PROTOCOL + 1) /* Set local device for a
* multicast socket */
#define IP_MULTICAST_TTL (__SO_PROTOCOL + 2) /* Set/read the time-to-
* live value of outgoing
* multicast packets */
#define IP_MULTICAST_LOOP (__SO_PROTOCOL + 3) /* Set/read boolean that
* determines whether sent
* multicast packets should
* be looped back to local
* sockets. */
#define IP_ADD_MEMBERSHIP (__SO_PROTOCOL + 4) /* Join a multicast group */
#define IP_DROP_MEMBERSHIP (__SO_PROTOCOL + 5) /* Leave a multicast group */
#define IP_UNBLOCK_SOURCE (__SO_PROTOCOL + 6) /* Unblock previously
* blocked multicast source */
#define IP_BLOCK_SOURCE (__SO_PROTOCOL + 7) /* Stop receiving multicast
* data from source */
#define IP_ADD_SOURCE_MEMBERSHIP (__SO_PROTOCOL + 8) /* Join a multicast group;
* allow receive only from
* source */
#define IP_DROP_SOURCE_MEMBERSHIP (__SO_PROTOCOL + 9) /* Leave a source-specific
* group. Stop receiving
* data from a given
* multicast group that come
* from a given source */
#define IP_MSFILTER (__SO_PROTOCOL + 10) /* Access advanced, full-
* state filtering API */
#define IP_MULTICAST_ALL (__SO_PROTOCOL + 11) /* Modify the delivery policy
* of multicast messages bound
* to INADDR_ANY */
#define IP_PKTINFO (__SO_PROTOCOL + 12) /* Get some information about
* the incoming packet */
/* SOL_IPV6 protocol-level socket options. */
#define IPV6_JOIN_GROUP (__SO_PROTOCOL + 1) /* Join a multicast group */
#define IPV6_LEAVE_GROUP (__SO_PROTOCOL + 2) /* Quit a multicast group */
#define IPV6_MULTICAST_HOPS (__SO_PROTOCOL + 3) /* Multicast hop limit */
#define IPV6_MULTICAST_IF (__SO_PROTOCOL + 4) /* Interface to use for
* outgoing multicast packets */
#define IPV6_MULTICAST_LOOP (__SO_PROTOCOL + 5) /* Multicast packets are
* delivered back to the local
* application */
#define IPV6_UNICAST_HOPS (__SO_PROTOCOL + 6) /* Unicast hop limit */
#define IPV6_V6ONLY (__SO_PROTOCOL + 7) /* Restrict AF_INET6 socket
* to IPv6 communications only */
#define IPV6_PKTINFO (__SO_PROTOCOL + 8) /* Get some information about
* the incoming packet */
/* Values used with SIOCSIFMCFILTER and SIOCGIFMCFILTER ioctl's */
#define MCAST_EXCLUDE 0
#define MCAST_INCLUDE 1
/* Test if an IPv4 address is a multicast address */
#define IN_CLASSD(i) (((uint32_t)(i) & 0xf0000000) == 0xe0000000)
#define IN_MULTICAST(i) IN_CLASSD(i)
/* Special values of in_addr_t */
#define INADDR_ANY ((in_addr_t)0x00000000) /* Address to accept any
* incoming messages */
#define INADDR_BROADCAST ((in_addr_t)0xffffffff) /* Address to send to
* all hosts */
#define INADDR_NONE ((in_addr_t)0xffffffff) /* Address indicating an
* error return */
#define INADDR_LOOPBACK ((in_addr_t)0x7f000001) /* Inet 127.0.0.1. */
/* Special initializer for in6_addr_t */
#define IN6ADDR_ANY_INIT {{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}}
#define IN6ADDR_LOOPBACK_INIT {{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}}}
/* Sizes of addresses (per OpenGroup.org) */
#define INET_ADDRSTRLEN 16 /* nnn.nnn.nnn.nnn */
#define INET6_ADDRSTRLEN 46 /* xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx */
/* struct in6_addr union selectors */
#define s6_addr in6_u.u6_addr8
#define s6_addr16 in6_u.u6_addr16
#define s6_addr32 in6_u.u6_addr32
/* Checks for special IPv6 addresses */
#define IN6_IS_ADDR_MULTICAST(a) \
((a)->s6_addr[0] == 0xff)
#define IN6_IS_ADDR_LOOPBACK(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] == HTONL(1))
#define IN6_IS_ADDR_UNSPECIFIED(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] == 0)
#define IN6_IS_ADDR_V4COMPAT(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] != 0 && \
(a)->s6_addr32[3] != NTOHL(1))
#define IN6_IS_ADDR_V4MAPPED(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == HTONL(0xffff))
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* IPv4/IPv6 port number */
typedef uint16_t in_port_t;
/* IPv4 Internet address */
typedef uint32_t in_addr_t;
struct in_addr
{
in_addr_t s_addr; /* Address (network byte order) */
};
struct sockaddr_in
{
sa_family_t sin_family; /* Address family: AF_INET */
in_port_t sin_port; /* Port in network byte order */
struct in_addr sin_addr; /* Internet address */
uint8_t sin_zero[8];
};
/* Used with certain IPv4 socket options */
struct ip_mreq
{
struct in_addr imr_multiaddr; /* IPv4 multicast address of group */
struct in_addr imr_interface; /* Local IPv4 address of interface */
};
struct ip_mreqn
{
struct in_addr imr_multiaddr; /* IPv4 multicast address of group */
struct in_addr imr_interface; /* Local IPv4 address of interface */
unsigned int imr_ifindex; /* Local interface index */
};
struct ip_mreq_source
{
struct in_addr imr_multiaddr; /* IPv4 multicast group address */
struct in_addr imr_interface; /* IPv4 address of local interface */
struct in_addr imr_sourceaddr; /* IPv4 address of multicast source */
};
struct ip_msfilter
{
struct in_addr imsf_multiaddr; /* IPv4 multicast group address */
struct in_addr imsf_interface; /* IPv4 address of local interface */
uint32_t imsf_fmode; /* Filter mode */
uint32_t imsf_numsrc; /* Number of sources in the following array */
struct in_addr imsf_slist[1]; /* Array of source addresses */
};
struct in_pktinfo
{
int ipi_ifindex; /* Interface index */
struct in_addr ipi_spec_dst; /* Local address */
struct in_addr ipi_addr; /* Header Destination address */
};
/* IPv6 Internet address */
struct in6_addr
{
union
{
uint8_t u6_addr8[16];
uint16_t u6_addr16[8];
uint32_t u6_addr32[4];
} in6_u;
};
struct sockaddr_in6
{
sa_family_t sin6_family; /* Address family: AF_INET6 */
in_port_t sin6_port; /* Port in network byte order */
uint32_t sin6_flowinfo; /* IPv6 traffic class and flow information */
struct in6_addr sin6_addr; /* IPv6 Internet address */
uint32_t sin6_scope_id; /* Set of interfaces for a scope */
};
/* Used with certain IPv6 socket options */
struct ipv6_mreq
{
struct in6_addr ipv6mr_multiaddr; /* IPv6 multicast address of group */
unsigned int ipv6mr_interface; /* Local interface index */
};
struct in6_pktinfo
{
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
int ipi6_ifindex; /* send/recv interface index */
};
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* Global IPv6 in6addr_any */
EXTERN const struct in6_addr in6addr_any;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_NETINET_IN_H */
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