Allow compiling for Windows XP and higher.

[tinc] / lib / fake-getaddrinfo.c

diff --git a/lib/fake-getaddrinfo.c b/lib/fake-getaddrinfo.c
index 0c9fae9..10672b7 100644 (file)
--- a/lib/fake-getaddrinfo.c
+++ b/lib/fake-getaddrinfo.c
@@ -14,8 +14,9 @@
 #include "ipv4.h"
 #include "ipv6.h"
 #include "fake-getaddrinfo.h"
+#include "xalloc.h"
 
-#ifndef HAVE_GAI_STRERROR
+#if !HAVE_DECL_GAI_STRERROR
 char *gai_strerror(int ecode)
 {
        switch (ecode) {
@@ -23,13 +24,15 @@ char *gai_strerror(int ecode)
                        return "No address associated with hostname";
                case EAI_MEMORY:
                        return "Memory allocation failure";
+               case EAI_FAMILY:
+                       return "Address family not supported";
                default:
                        return "Unknown error";
        }
 }    
 #endif /* !HAVE_GAI_STRERROR */
 
-#ifndef HAVE_FREEADDRINFO
+#if !HAVE_DECL_FREEADDRINFO
 void freeaddrinfo(struct addrinfo *ai)
 {
        struct addrinfo *next;
@@ -42,7 +45,7 @@ void freeaddrinfo(struct addrinfo *ai)
 }
 #endif /* !HAVE_FREEADDRINFO */
 
-#ifndef HAVE_GETADDRINFO
+#if !HAVE_DECL_GETADDRINFO
 static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr)
 {
        struct addrinfo *ai;
@@ -67,6 +70,9 @@ int getaddrinfo(const char *hostname, const char *servname, const struct addrinf
        int i;
        uint16_t port = 0;
 
+       if(hints && hints->ai_family != AF_INET && hints->ai_family != AF_UNSPEC)
+               return EAI_FAMILY;
+
        if (servname)
                port = htons(atoi(servname));
 
@@ -82,7 +88,7 @@ int getaddrinfo(const char *hostname, const char *servname, const struct addrinf
        
        hp = gethostbyname(hostname);
 
-       if(!hp || !hp->h_addr_list[0])
+       if(!hp || !hp->h_addr_list || !hp->h_addr_list[0])
                return EAI_NODATA;
 
        for (i = 0; hp->h_addr_list[i]; i++) {