Getaddrinfo(), getnameinfo(), and etc support in libc/net.

Several udp and raw apps IPv6 support.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project

1 files changed, 77 insertions, 0 deletions

diff --git a/include/netdb.h b/include/netdb.h
index 987523e..4206c73 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -62,6 +62,7 @@
 #define _NETDB_H_
 
 #include <sys/cdefs.h>
+#include <sys/types.h>
 
 #ifndef _PATH_HEQUIV
 # define	_PATH_HEQUIV	"/etc/hosts.equiv"
@@ -111,6 +112,17 @@ struct	protoent {
 	int	p_proto;	/* protocol # */
 };
 
+struct addrinfo {
+	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
+	int	ai_family;	/* PF_xxx */
+	int	ai_socktype;	/* SOCK_xxx */
+	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+	size_t	ai_addrlen;	/* length of ai_addr */
+	char	*ai_canonname;	/* canonical name for hostname */
+	struct	sockaddr *ai_addr;	/* binary address */
+	struct	addrinfo *ai_next;	/* next structure in linked list */
+};
+
 /*
  * Error return codes from gethostbyname() and gethostbyaddr()
  * (left in extern int h_errno).
@@ -124,15 +136,74 @@ struct	protoent {
 #define	NO_DATA		4 /* Valid name, no data record of requested type */
 #define	NO_ADDRESS	NO_DATA		/* no address, look for MX record */
 
+/*
+ * Error return codes from getaddrinfo()
+ */
+#define	EAI_ADDRFAMILY	 1	/* address family for hostname 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 hostname */
+#define	EAI_NONAME	 8	/* hostname nor servname provided, or not known */
+#define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
+#define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
+#define	EAI_SYSTEM	11	/* system error returned in errno */
+#define	EAI_BADHINTS	12
+#define	EAI_PROTOCOL	13
+#define	EAI_RESNULL	14
+#define	EAI_MAX		15
+
+/*
+ * Flag values for getaddrinfo()
+ */
+#define	AI_PASSIVE	0x00000001 /* get address to use bind() */
+#define	AI_CANONNAME	0x00000002 /* fill ai_canonname */
+#define	AI_NUMERICHOST	0x00000004 /* prevent name resolution */
+/* valid flags for addrinfo */
+#define	AI_MASK		(AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
+
+#define	AI_ALL		0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
+#define	AI_V4MAPPED_CFG	0x00000200 /* accept IPv4-mapped if kernel supports */
+#define	AI_ADDRCONFIG	0x00000400 /* only if any address is assigned */
+#define	AI_V4MAPPED	0x00000800 /* accept IPv4-mapped IPv6 address */
+/* special recommended flags for getipnodebyname */
+#define	AI_DEFAULT	(AI_V4MAPPED_CFG | AI_ADDRCONFIG)
+
+/*
+ * Constants for getnameinfo()
+ */
+#define	NI_MAXHOST	1025
+#define	NI_MAXSERV	32
+
+/*
+ * Flag values for getnameinfo()
+ */
+#define	NI_NOFQDN	0x00000001
+#define	NI_NUMERICHOST	0x00000002
+#define	NI_NAMEREQD	0x00000004
+#define	NI_NUMERICSERV	0x00000008
+#define	NI_DGRAM	0x00000010
+#define NI_WITHSCOPEID	0x00000020
+
+/*
+ * Scope delimit character
+ */
+#define	SCOPE_DELIMITER	'@'
+
 __BEGIN_DECLS
 void		endhostent __P((void));
 void		endnetent __P((void));
 void		endprotoent __P((void));
 void		endservent __P((void));
+void		freehostent __P((struct hostent *));
 struct hostent	*gethostbyaddr __P((const char *, int, int));
 struct hostent	*gethostbyname __P((const char *));
 struct hostent	*gethostbyname2 __P((const char *, int));
 struct hostent	*gethostent __P((void));
+struct hostent	*getipnodebyaddr __P((const void *, size_t, int, int *));
+struct hostent	*getipnodebyname __P((const char *, int, int, int *));
 struct netent	*getnetbyaddr __P((unsigned long, int));
 struct netent	*getnetbyname __P((const char *));
 struct netent	*getnetent __P((void));
@@ -148,6 +219,12 @@ void		sethostent __P((int));
 /* void		sethostfile __P((const char *)); */
 void		setnetent __P((int));
 void		setprotoent __P((int));
+int		getaddrinfo __P((const char *, const char *,
+				 const struct addrinfo *, struct addrinfo **));
+int		getnameinfo __P((const struct sockaddr *, size_t, char *,
+				 size_t, char *, size_t, int));
+void		freeaddrinfo __P((struct addrinfo *));
+char		*gai_strerror __P((int));
 void		setservent __P((int));
 
 /*