Return to getaddrinfo.h CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / sudo / compat

1.8.7

    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 */