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Annotation of embedaddon/sudo/compat/getaddrinfo.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Replacement implementation of getaddrinfo.
                      3:  *
                      4:  * This is an implementation of the getaddrinfo family of functions for
                      5:  * systems that lack it, so that code can use getaddrinfo always.  It provides
                      6:  * IPv4 support only; for IPv6 support, a native getaddrinfo implemenation is
                      7:  * required.
                      8:  *
                      9:  * The canonical version of this file is maintained in the rra-c-util package,
                     10:  * which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
                     11:  *
                     12:  * Written by Russ Allbery <rra@stanford.edu>
                     13:  *
                     14:  * The authors hereby relinquish any claim to any copyright that they may have
                     15:  * in this work, whether granted under contract or by operation of law or
                     16:  * international treaty, and hereby commit to the public, at large, that they
                     17:  * shall not, at any time in the future, seek to enforce any copyright in this
                     18:  * work against any person or entity, or prevent any person or entity from
                     19:  * copying, publishing, distributing or creating derivative works of this
                     20:  * work.
                     21:  */
                     22: 
                     23: #ifndef _COMPAT_GETADDRINFO_H
                     24: #define _COMPAT_GETADDRINFO_H
                     25: 
                     26: #include <config.h>
                     27: 
                     28: /* Skip this entire file if a system getaddrinfo was detected. */
                     29: #ifndef HAVE_GETADDRINFO
                     30: 
                     31: /* OpenBSD likes to have sys/types.h included before sys/socket.h. */
                     32: #include <sys/types.h>
                     33: #include <sys/socket.h>
                     34: 
                     35: /* The struct returned by getaddrinfo, from RFC 3493. */
                     36: struct addrinfo {
                     37:     int ai_flags;               /* AI_PASSIVE, AI_CANONNAME, .. */
                     38:     int ai_family;              /* AF_xxx */
                     39:     int ai_socktype;            /* SOCK_xxx */
                     40:     int ai_protocol;            /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
                     41:     socklen_t ai_addrlen;       /* Length of ai_addr */
                     42:     char *ai_canonname;         /* Canonical name for nodename */
                     43:     struct sockaddr *ai_addr;   /* Binary address */
                     44:     struct addrinfo *ai_next;   /* Next structure in linked list */
                     45: };
                     46: 
                     47: /* Constants for ai_flags from RFC 3493, combined with binary or. */
                     48: #define AI_PASSIVE      0x0001
                     49: #define AI_CANONNAME    0x0002
                     50: #define AI_NUMERICHOST  0x0004
                     51: #define AI_NUMERICSERV  0x0008
                     52: #define AI_V4MAPPED     0x0010
                     53: #define AI_ALL          0x0020
                     54: #define AI_ADDRCONFIG   0x0040
                     55: 
                     56: /* Error return codes from RFC 3493. */
                     57: #define EAI_AGAIN       1       /* Temporary name resolution failure */
                     58: #define EAI_BADFLAGS    2       /* Invalid value in ai_flags parameter */
                     59: #define EAI_FAIL        3       /* Permanent name resolution failure */
                     60: #define EAI_FAMILY      4       /* Address family not recognized */
                     61: #define EAI_MEMORY      5       /* Memory allocation failure */
                     62: #define EAI_NONAME      6       /* nodename or servname unknown */
                     63: #define EAI_SERVICE     7       /* Service not recognized for socket type */
                     64: #define EAI_SOCKTYPE    8       /* Socket type not recognized */
                     65: #define EAI_SYSTEM      9       /* System error occurred, see errno */
                     66: #define EAI_OVERFLOW    10      /* An argument buffer overflowed */
                     67: 
                     68: /* Function prototypes. */
                     69: int getaddrinfo(const char *nodename, const char *servname,
                     70:                 const struct addrinfo *hints, struct addrinfo **res);
                     71: void freeaddrinfo(struct addrinfo *ai);
                     72: const char *gai_strerror(int ecode);
                     73: 
                     74: #endif /* !HAVE_GETADDRINFO */
                     75: #endif /* _COMPAT_GETADDRINFO_H */