sockaddr
Section: Misc. Reference Manual Pages (3type)
Updated: 2022-10-30
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NAME
sockaddr, sockaddr_storage, sockaddr_in, sockaddr_in6, sockaddr_un, socklen_t,
in_addr, in6_addr, in_addr_t, in_port_t,
- socket address
LIBRARY
Standard C library
(libc)
SYNOPSIS
#include <sys/socket.h>
struct sockaddr {
sa_family_t sa_family; /* Address family */
char sa_data[]; /* Socket address */
};
struct sockaddr_storage {
sa_family_t ss_family; /* Address family */
};
typedef /* ... */ socklen_t;
typedef /* ... */ sa_family_t;
Internet domain sockets
#include <netinet/in.h>
struct sockaddr_in {
sa_family_t sin_family; /* AF_INET */
in_port_t sin_port; /* Port number */
struct in_addr sin_addr; /* IPv4 address */
};
struct sockaddr_in6 {
sa_family_t sin6_family; /* AF_INET6 */
in_port_t sin6_port; /* Port number */
uint32_t sin6_flowinfo; /* IPv6 flow info */
struct in6_addr sin6_addr; /* IPv6 address */
uint32_t sin6_scope_id; /* Set of interfaces for a scope */
};
struct in_addr {
in_addr_t s_addr;
};
struct in6_addr {
uint8_t s6_addr[16];
};
typedef uint32_t in_addr_t;
typedef uint16_t in_port_t;
UNIX domain sockets
#include <sys/un.h>
struct sockaddr_un {
sa_family_t sun_family; /* Address family */
char sun_path[]; /* Socket pathname */
};
DESCRIPTION
- sockaddr
-
Describes a socket address.
- sockaddr_storage
-
A structure at least as large as any other
sockaddr_*
address structures.
It's aligned so that a pointer to it can be cast
as a pointer to other
sockaddr_*
structures and used to access its fields.
- socklen_t
-
Describes the length of a socket address.
This is an integer type of at least 32 bits.
- sa_family_t
-
Describes a socket's protocol family.
This is an unsigned integer type.
Internet domain sockets
- sockaddr_in
-
Describes an IPv4 Internet domain socket address.
The
sin_port
and
sin_addr
members are stored in network byte order.
- sockaddr_in6
-
Describes an IPv6 Internet domain socket address.
The
sin6_addr.s6_addr
array is used to contain a 128-bit IPv6 address,
stored in network byte order.
UNIX domain sockets
- sockaddr_un
-
Describes a UNIX domain socket address.
STANDARDS
POSIX.1-2001 and later.
NOTES
socklen_t
is also defined in
<netdb.h>.
sa_family_t
is also defined in
<netinet/in.h>
and
<sys/un.h>.
SEE ALSO
accept(2),
bind(2),
connect(2),
getpeername(2),
getsockname(2),
getsockopt(2),
sendto(2),
setsockopt(2),
socket(2),
socketpair(2),
getaddrinfo(3),
gethostbyaddr(3),
getnameinfo(3),
htonl(3),
ipv6(7),
socket(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- Internet domain sockets
-
- UNIX domain sockets
-
- DESCRIPTION
-
- Internet domain sockets
-
- UNIX domain sockets
-
- STANDARDS
-
- NOTES
-
- SEE ALSO
-
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Time: 16:01:57 GMT, May 18, 2024