netinet/in.h - Internet Protocol family
#include <netinet/in.h>
When header file <netinet.h> is included, the following types are defined through typedef.
- in_port_t
- An unsigned integral type of exactly 16 bits.
- in_addr_t
- An unsigned integral type of exactly 32 bits.
The <netinet/in.h> header defines the in_addr structure that includes at least the following member:
- in_addr_t s_addr
The <netinet/in.h> header defines the sockaddr_in structure that includes at least the following members:The sockaddr_in structure is used to store addresses for the Internet protocol family. Values of this type must be cast to struct sockaddr for use with the socket interfaces defined in this document.
- sa_family_t sin_family in_port_t sin_port struct in_addr sin_addr unsigned char sin_zero[8]
The
<netinet/in.h> header defines the type sa_family_t as described in<sys/socket.h> .The
<netinet/in.h> header defines the following macros for use as values of the level argument ofgetsockopt() andsetsockopt() :
- IPPROTO_IP
- IP
- IPPROTO_ICMP
- Control message protocol
- IPPROTO_TCP
- TCP
- IPPROTO_UDP
- User datagram protocol
The
<netinet/in.h> header defines the following macros for use as destination addresses forconnect() ,sendmsg() andsendto() :
- INADDR_ANY
IPv4 local host address
- INADDR_BROADCAST
IPv4 broadcast address
The
<netinet/in.h> header defines the following macro to help applications declare buffers of the proper size to store IPv4 addresses in string form:
- INET_ADDRSTRLEN 16
ntohl() ,ntohs() ,htonl() andhtons() as defined in the description of<arpa/inet.h> are available. Inclusion of the<netinet/in.h> header may also make visible all symbols from<arpa/inet.h> .
getsockopt() ,setsockopt() .<sys/socket.h> .
First released in Issue 4.
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