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netinclude
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netdb.h
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C/C++ Source or Header
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1997-12-08
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3KB
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91 lines
#ifndef _NETDB_H_
#define _NETDB_H_
/*
* Structures returned by network data base library. All addresses are
* supplied in host order, and returned in network order (suitable for
* use in system calls).
*/
struct hostent {
char *h_name; /* official name of host */
char **h_aliases; /* alias list */
long h_addrtype; /* host address type */
long h_length; /* length of address */
char **h_addr_list; /* list of addresses from name server */
#define h_addr h_addr_list[0] /* address, for backward compatiblity */
};
/*
* Assumption here is that a network number
* fits in an unsigned long -- probably a poor one.
*/
struct netent {
char *n_name; /* official name of net */
char **n_aliases; /* alias list */
long n_addrtype; /* net address type */
unsigned long n_net; /* network # */
};
struct servent {
char *s_name; /* official service name */
char **s_aliases; /* alias list */
long s_port; /* port # */
char *s_proto; /* protocol to use */
};
struct protoent {
char *p_name; /* official protocol name */
char **p_aliases; /* alias list */
long p_proto; /* protocol # */
};
/*
* Error return codes from gethostbyname() and gethostbyaddr()
*/
#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */
#define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */
#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
#define NO_DATA 4 /* Valid name, no data record of requested type */
#define NO_ADDRESS NO_DATA /* no address, look for MX record */
struct addrinfo {
long ai_flags; /* AI_PASSIVE, AI_CANONNAME */
long ai_family; /* PF_xxx */
long ai_socktype; /* SOCK_xxx */
long ai_protocol; /* IPPROTO_xxx for IPv4 and IPv6 */
size_t ai_addrlen; /* length of ai_addr */
char *ai_canonname; /* canonical name for host */
struct sockaddr *ai_addr; /* binary address */
struct addrinfo *ai_next; /* next structure in linked list */
};
/* following for getaddrinfo() */
#define AI_PASSIVE 1 /* socket is intended for bind() + listen() */
#define AI_CANONNAME 2 /* return canonical name */
/* following for getnameinfo() */
#define NI_MAXHOST 1025 /* max hostname returned */
#define NI_MAXSERV 32 /* max service name returned */
#define NI_NOFQDN 1 /* do not return FQDN */
#define NI_NUMERICHOST 2 /* return numeric form of hostname */
#define NI_NAMEREQD 4 /* return error if hostname not found */
#define NI_NUMERICSERV 8 /* return numeric form of service name */
#define NI_DGRAM 16 /* datagram service for getservbyname() */
/* error returns */
#define EAI_ADDRFAMILY 1 /* address family for host not supported */
#define EAI_AGAIN 2 /* temporary failure in name resolution */
#define EAI_BADFLAGS 3 /* invalid value for ai_flags */
#define EAI_FAIL 4 /* non-recoverable failure in name resolution */
#define EAI_FAMILY 5 /* ai_family not supported */
#define EAI_MEMORY 6 /* memory allocation failure */
#define EAI_NODATA 7 /* no address associated with host */
#define EAI_NONAME 8 /* host nor service provided, or not known */
#define EAI_SERVICE 9 /* service not supported for ai_socktype */
#define EAI_SOCKTYPE 10 /* ai_socktype not supported */
#define EAI_SYSTEM 11 /* system error returned in errno */
#endif /* !_NETDB_H_ */