mirror of https://github.com/sudo-project/sudo.git
84 lines
3.4 KiB
C
84 lines
3.4 KiB
C
/*
|
|
* 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 */
|