1 files changed, 112 insertions, 0 deletions
diff --git a/methods/rfc2553emu.h b/methods/rfc2553emu.h
new file mode 100644
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+++ b/methods/rfc2553emu.h
@@ -0,0 +1,112 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo,
+                        freeaddrinfo and getnameinfo
+   
+   These functions are necessary to write portable protocol independent
+   networking. They transparently support IPv4, IPv6 and probably many 
+   other protocols too. This implementation is needed when the host does 
+   not support these standards. It implements a simple wrapper that 
+   basically supports only IPv4. 
+
+   Perfect emulation is not provided, but it is passable..
+   
+   Originally written by Jason Gunthorpe <jgg@debian.org> and placed into
+   the Public Domain, do with it what you will.
+  
+   ##################################################################### */
+									/*}}}*/
+#ifndef RFC2553EMU_H
+#define RFC2553EMU_H
+
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+// Autosense getaddrinfo
+#if defined(AI_PASSIVE) && defined(EAI_NONAME)
+#define HAVE_GETADDRINFO
+#endif
+
+// Autosense getnameinfo
+#if defined(NI_NUMERICHOST)
+#define HAVE_GETNAMEINFO
+#endif
+
+// getaddrinfo support?
+#ifndef HAVE_GETADDRINFO
+  // Renamed to advoid type clashing.. (for debugging)
+  struct addrinfo_emu
+  {   
+     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 nodename */
+     struct sockaddr  *ai_addr; /* binary address */
+     struct addrinfo_emu  *ai_next; /* next structure in linked list */
+  };
+  #define addrinfo addrinfo_emu
+
+  int getaddrinfo(const char *nodename, const char *servname,
+                  const struct addrinfo *hints,
+                  struct addrinfo **res);
+  void freeaddrinfo(struct addrinfo *ai);
+
+  #ifndef AI_PASSIVE
+  #define AI_PASSIVE (1<<1)
+  #endif
+  
+  #ifndef EAI_NONAME
+  #define EAI_NONAME     -1
+  #define EAI_AGAIN      -2
+  #define EAI_FAIL       -3
+  #define EAI_NODATA     -4
+  #define EAI_FAMILY     -5
+  #define EAI_SOCKTYPE   -6
+  #define EAI_SERVICE    -7
+  #define EAI_ADDRFAMILY -8
+  #define EAI_SYSTEM     -10
+  #define EAI_MEMORY     -11
+  #endif
+
+  /* If we don't have getaddrinfo then we probably don't have 
+     sockaddr_storage either (same RFC) so we definitely will not be
+     doing any IPv6 stuff. Do not use the members of this structure to
+     retain portability, cast to a sockaddr. */
+  #define sockaddr_storage sockaddr_in
+#endif
+
+// getnameinfo support (glibc2.0 has getaddrinfo only)
+#ifndef HAVE_GETNAMEINFO
+
+  int getnameinfo(const struct sockaddr *sa, socklen_t salen,
+		  char *host, size_t hostlen,
+		  char *serv, size_t servlen,
+		  int flags);
+
+  #ifndef NI_MAXHOST
+  #define NI_MAXHOST 1025
+  #define NI_MAXSERV 32
+  #endif
+
+  #ifndef NI_NUMERICHOST
+  #define NI_NUMERICHOST (1<<0)
+  #define NI_NUMERICSERV (1<<1)
+//  #define NI_NOFQDN (1<<2)
+  #define NI_NAMEREQD (1<<3)
+  #define NI_DATAGRAM (1<<4)
+  #endif
+
+  #define sockaddr_storage sockaddr_in
+#endif
+
+// Glibc 2.0.7 misses this one
+#ifndef AI_NUMERICHOST
+#define AI_NUMERICHOST 0
+#endif
+
+#endif