addrinfo

TCP/IP address information

Synopsis:

#include <netdb.h>

struct addrinfo {
    int ai_flags;
    int ai_family;
    int ai_socktype;
    int ai_protocol;
    size_t ai_addrlen;
    char * ai_canonname;
    struct sockaddr * ai_addr;
    struct addrinfo * ai_next
};

Description:

The addrinfo structure describes address information for use with TCP/IP. To get this information, call getaddrinfo(); to free a linked list of these structures, call freeaddrinfo().

The addrinfo structure includes these members:

ai_flags: Flags, including AI_PASSIVE, AI_CANONNAME, and AI_NUMERICHOST. For a complete list, see <netdb.h>.
ai_family: Protocol family, including PF_UNSPEC and PF_INET. For a complete list, see <sys/socket.h>.
ai_socktype: Socket type, including SOCK_STREAM and SOCK_DGRAM. For a complete list, see <sys/socket.h>.
ai_protocol: Protocol, including IPPROTO_TCP and IPPROTO_UDP. For a complete list, see <netinet/in.h>.
ai_addrlen: The length of the ai_addr member.
ai_canonname: The canonical name for nodename.
ai_addr: Binary socket address.
ai_next: A pointer to the next addrinfo structure in the linked list.

Classification:

POSIX 1003.1