// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: rfc2553emu.cc,v 1.1 1999/05/25 05:56:24 jgg Exp $
+// $Id: rfc2553emu.cc,v 1.8 2001/02/20 07:03:18 jgg Exp $
/* ######################################################################
RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo,
freeaddrinfo and getnameinfo
+
+ This is really C code, it just has a .cc extensions to play nicer with
+ the rest of APT.
Originally written by Jason Gunthorpe <jgg@debian.org> and placed into
the Public Domain, do with it what you will.
-
+
##################################################################### */
/*}}}*/
-#include "rfc2553emu.h"
+#include <config.h>
+
#include <stdlib.h>
#include <arpa/inet.h>
-#include <iostream.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <stdio.h>
+#include "rfc2553emu.h"
#ifndef HAVE_GETADDRINFO
+// getaddrinfo - Resolve a hostname /*{{{*/
+// ---------------------------------------------------------------------
+/* */
int getaddrinfo(const char *nodename, const char *servname,
const struct addrinfo *hints,
struct addrinfo **res)
{
- struct addrinfo **Result;
+ struct addrinfo **Result = res;
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;
Proto = hints->ai_socktype;
// Not a number, must be a name.
- if (End != servname + strlen(End))
+ if (End != servname + strlen(servname))
{
struct servent *Srv = 0;
hints->ai_socktype != 0)
return EAI_SERVICE;
}
+
+ // Hostname lookup, only if this is not a listening socket
+ if (hints != 0 && (hints->ai_flags & AI_PASSIVE) != AI_PASSIVE)
+ {
+ 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;
+
+ CurAddr = Addr->h_addr_list;
+ }
+ else
+ CurAddr = (char **)&End; // Fake!
// Start constructing the linked list
*res = 0;
- for (CurAddr = Addr->h_addr_list; *CurAddr != 0; CurAddr++)
+ for (; *CurAddr != 0; CurAddr++)
{
// New result structure
*Result = (struct addrinfo *)calloc(sizeof(**Result),1);
// 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);
-
+
+ if (hints != 0 && (hints->ai_flags & AI_PASSIVE) != AI_PASSIVE)
+ ((struct sockaddr_in *)(*Result)->ai_addr)->sin_addr = *(in_addr *)(*CurAddr);
+ else
+ {
+ // Already zerod by calloc.
+ break;
+ }
+
Result = &(*Result)->ai_next;
}
return 0;
}
-
+ /*}}}*/
+// freeaddrinfo - Free the result of getaddrinfo /*{{{*/
+// ---------------------------------------------------------------------
+/* */
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
+
+#ifndef HAVE_GETNAMEINFO
+// getnameinfo - Convert a sockaddr to a string /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+int getnameinfo(const struct sockaddr *sa, socklen_t salen,
+ char *host, size_t hostlen,
+ char *serv, size_t servlen,
+ int flags)
+{
+ struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+
+ // This routine only supports internet addresses
+ if (sa->sa_family != AF_INET)
+ return EAI_ADDRFAMILY;
+
+ if (host != 0)
+ {
+ // Try to resolve the hostname
+ if ((flags & NI_NUMERICHOST) != NI_NUMERICHOST)
+ {
+ struct hostent *Ent = gethostbyaddr((char *)&sin->sin_addr,sizeof(sin->sin_addr),
+ AF_INET);
+ if (Ent != 0)
+ strncpy(host,Ent->h_name,hostlen);
+ else
+ {
+ if ((flags & NI_NAMEREQD) == NI_NAMEREQD)
+ {
+ if (h_errno == TRY_AGAIN)
+ return EAI_AGAIN;
+ if (h_errno == NO_RECOVERY)
+ return EAI_FAIL;
+ return EAI_NONAME;
+ }
+
+ flags |= NI_NUMERICHOST;
+ }
+ }
+
+ // Resolve as a plain numberic
+ if ((flags & NI_NUMERICHOST) == NI_NUMERICHOST)
+ {
+ strncpy(host,inet_ntoa(sin->sin_addr),hostlen);
+ }
+ }
+
+ if (serv != 0)
+ {
+ // Try to resolve the hostname
+ if ((flags & NI_NUMERICSERV) != NI_NUMERICSERV)
+ {
+ struct servent *Ent;
+ if ((flags & NI_DATAGRAM) == NI_DATAGRAM)
+ Ent = getservbyport(ntohs(sin->sin_port),"udp");
+ else
+ Ent = getservbyport(ntohs(sin->sin_port),"tcp");
+
+ if (Ent != 0)
+ strncpy(serv,Ent->s_name,servlen);
+ else
+ {
+ if ((flags & NI_NAMEREQD) == NI_NAMEREQD)
+ return EAI_NONAME;
+
+ flags |= NI_NUMERICSERV;
+ }
+ }
+
+ // Resolve as a plain numberic
+ if ((flags & NI_NUMERICSERV) == NI_NUMERICSERV)
+ {
+ snprintf(serv,servlen,"%u",ntohs(sin->sin_port));
+ }
+ }
+
+ return 0;
+}
+ /*}}}*/
+#endif // HAVE_GETNAMEINFO
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