Changed to using rfc2553 name resolution for http

[ntk/apt.git] / methods / rfc2553emu.cc

diff --git a/methods/rfc2553emu.cc b/methods/rfc2553emu.cc
new file mode 100644 (file)
index 0000000..66fe781
--- /dev/null
+++ b/methods/rfc2553emu.cc
@@ -0,0 +1,139 @@
+// -*- mode: cpp; mode: fold -*-
+// Description                                                         /*{{{*/
+// $Id: rfc2553emu.cc,v 1.1 1999/05/25 05:56:24 jgg Exp $
+/* ######################################################################
+
+   RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo,
+                        freeaddrinfo and getnameinfo
+   
+   Originally written by Jason Gunthorpe <jgg@debian.org> and placed into
+   the Public Domain, do with it what you will.
+   
+   ##################################################################### */
+                                                                       /*}}}*/
+#include "rfc2553emu.h"
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <iostream.h>
+
+#ifndef HAVE_GETADDRINFO
+int getaddrinfo(const char *nodename, const char *servname,
+               const struct addrinfo *hints,
+               struct addrinfo **res)
+{
+   struct addrinfo **Result;
+   hostent *Addr;
+   unsigned int Port;
+   int Proto;
+   const char *End;
+   char **CurAddr;
+   
+   Addr = gethostbyname(nodename);
+   if (Addr == 0)
+   {
+      if (h_errno == TRY_AGAIN)
+        return EAI_AGAIN;
+      if (h_errno == NO_RECOVERY)
+        return EAI_FAIL;
+      return EAI_NONAME;
+   }
+   
+   // No A records 
+   if (Addr->h_addr_list[0] == 0)
+      return EAI_NONAME;
+
+   // Try to convert the service as a number
+   Port = htons(strtol(servname,(char **)&End,0));
+   Proto = SOCK_STREAM;
+   
+   if (hints != 0 && hints->ai_socktype != 0)
+      Proto = hints->ai_socktype;
+   
+   // Not a number, must be a name.
+   if (End != servname + strlen(End))
+   {
+      struct servent *Srv = 0;
+      
+      // Do a lookup in the service database
+      if (hints == 0 || hints->ai_socktype == SOCK_STREAM)
+        Srv = getservbyname(servname,"tcp");
+      if (hints != 0 && hints->ai_socktype == SOCK_DGRAM)
+        Srv = getservbyname(servname,"udp");
+      if (Srv == 0)
+        return EAI_NONAME;  
+      
+      // Get the right protocol
+      Port = Srv->s_port;
+      if (strcmp(Srv->s_proto,"tcp") == 0)
+        Proto = SOCK_STREAM;
+      else
+      {
+        if (strcmp(Srv->s_proto,"udp") == 0)
+           Proto = SOCK_DGRAM;
+         else
+           return EAI_NONAME;
+      }      
+      
+      if (hints != 0 && hints->ai_socktype != Proto && 
+         hints->ai_socktype != 0)
+        return EAI_SERVICE;
+   }
+   
+   // Start constructing the linked list
+   *res = 0;
+   for (CurAddr = Addr->h_addr_list; *CurAddr != 0; CurAddr++)
+   {
+      // New result structure
+      *Result = (struct addrinfo *)calloc(sizeof(**Result),1);
+      if (*Result == 0)
+      {
+        freeaddrinfo(*res);
+        return EAI_MEMORY;
+      }
+      if (*res == 0)
+        *res = *Result;
+      
+      (*Result)->ai_family = AF_INET;
+      (*Result)->ai_socktype = Proto;
+
+      // If we have the IPPROTO defines we can set the protocol field
+      #ifdef IPPROTO_TCP
+      if (Proto == SOCK_STREAM)
+        (*Result)->ai_protocol = IPPROTO_TCP;
+      if (Proto == SOCK_DGRAM)
+        (*Result)->ai_protocol = IPPROTO_UDP;
+      #endif
+
+      // Allocate space for the address
+      (*Result)->ai_addrlen = sizeof(struct sockaddr_in);
+      (*Result)->ai_addr = (struct sockaddr *)calloc(sizeof(sockaddr_in),1);
+      if ((*Result)->ai_addr == 0)
+      {
+        freeaddrinfo(*res);
+        return EAI_MEMORY;
+      }
+      
+      // Set the address
+      ((struct sockaddr_in *)(*Result)->ai_addr)->sin_family = AF_INET;
+      ((struct sockaddr_in *)(*Result)->ai_addr)->sin_port = Port;
+      ((struct sockaddr_in *)(*Result)->ai_addr)->sin_addr = *(in_addr *)(*CurAddr);
+
+      Result = &(*Result)->ai_next;
+   }
+   
+   return 0;
+}
+
+void freeaddrinfo(struct addrinfo *ai)
+{
+   struct addrinfo *Tmp;
+   while (ai != 0)
+   {
+      free(ai->ai_addr);
+      Tmp = ai;
+      ai = ai->ai_next;
+      free(ai);
+   }
+}
+
+#endif // HAVE_GETADDRINFO