arpa/inet.h - definitions for internet operations
#include <arpa/inet.h>
The <arpa/inet.h> header makes available the type in_port_t and the type in_addr_t as defined in the description of <netinet/in.h>.The <arpa/inet.h> header makes available the in_addr structure, as defined in the description of <netinet/in.h>.
The following may be declared as functions, or defined as macros, or both:
uint32_t htonl(uint32_t hostlong); uint16_t htons(uint16_t hostshort); uint32_t ntohl(uint32_t netlong); uint16_t ntohs(uint16_t netshort);
The uint32_t and uint16_t types are made available by inclusion of <inttypes.h> (see referenced document XSH).
The following are declared as functions, and may also be defined as macros:
Inclusion of the <arpa/inet.h> header may also make visible all symbols from <netinet/in.h> and <inttypes.h>.in_addr_t inet_addr(const char *cp); in_addr_t inet_lnaof(struct in_addr in); struct in_addr inet_makeaddr(in_addr_t net, in_addr_t lna); in_addr_t inet_netof(struct in_addr in); in_addr_t inet_network(const char *cp); char *inet_ntoa(struct in_addr in);
htonl(), inet_addr(), <netinet/in.h>.