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/*
* Replacement implementation of getaddrinfo.
*
* This is an implementation of the getaddrinfo family of functions for
* systems that lack it, so that code can use getaddrinfo always. It provides
* IPv4 support only; for IPv6 support, a system getaddrinfo implementation is
* required.
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
*
* Written by Russ Allbery <rra@stanford.edu>
*
* The authors hereby relinquish any claim to any copyright that they may have
* in this work, whether granted under contract or by operation of law or
* international treaty, and hereby commit to the public, at large, that they
* shall not, at any time in the future, seek to enforce any copyright in this
* work against any person or entity, or prevent any person or entity from
* copying, publishing, distributing or creating derivative works of this
* work.
*/
#ifndef COMPAT_GETADDRINFO_H
#define COMPAT_GETADDRINFO_H
#include <config.h>
/* Skip this entire file if a system getaddrinfo was detected. */
#ifndef HAVE_GETADDRINFO
/* OpenBSD likes to have sys/types.h included before sys/socket.h. */
#include <sys/types.h>
#include <sys/socket.h>
/* The struct returned by getaddrinfo, from RFC 3493. */
struct addrinfo {
int ai_flags; /* AI_PASSIVE, AI_CANONNAME, .. */
int ai_family; /* AF_xxx */
int ai_socktype; /* SOCK_xxx */
int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
socklen_t ai_addrlen; /* Length of ai_addr */
char *ai_canonname; /* Canonical name for nodename */
struct sockaddr *ai_addr; /* Binary address */
struct addrinfo *ai_next; /* Next structure in linked list */
};
/* Constants for ai_flags from RFC 3493, combined with binary or. */
#define AI_PASSIVE 0x0001
#define AI_CANONNAME 0x0002
#define AI_NUMERICHOST 0x0004
#define AI_NUMERICSERV 0x0008
#define AI_V4MAPPED 0x0010
#define AI_ALL 0x0020
#define AI_ADDRCONFIG 0x0040
/* Error return codes from RFC 3493. */
#define EAI_AGAIN 1 /* Temporary name resolution failure */
#define EAI_BADFLAGS 2 /* Invalid value in ai_flags parameter */
#define EAI_FAIL 3 /* Permanent name resolution failure */
#define EAI_FAMILY 4 /* Address family not recognized */
#define EAI_MEMORY 5 /* Memory allocation failure */
#define EAI_NONAME 6 /* nodename or servname unknown */
#define EAI_SERVICE 7 /* Service not recognized for socket type */
#define EAI_SOCKTYPE 8 /* Socket type not recognized */
#define EAI_SYSTEM 9 /* System error occurred, see errno */
#define EAI_OVERFLOW 10 /* An argument buffer overflowed */
/* Function prototypes. */
sudo_dso_public int sudo_getaddrinfo(const char *nodename, const char *servname,
const struct addrinfo *hints, struct addrinfo **res);
sudo_dso_public void sudo_freeaddrinfo(struct addrinfo *ai);
sudo_dso_public const char *sudo_gai_strerror(int ecode);
/* Map sudo_* to RFC 3493 names. */
#undef getaddrinfo
#define getaddrinfo(_a, _b, _c, _d) sudo_getaddrinfo((_a), (_b), (_c), (_d))
#undef freeaddrinfo
#define freeaddrinfo(_a) sudo_freeaddrinfo((_a))
#undef gai_strerror
#define gai_strerror(_a) sudo_gai_strerror((_a))
#endif /* !HAVE_GETADDRINFO */
#endif /* COMPAT_GETADDRINFO_H */
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