[PATCH 1/2] gresolv: added the capability to restrict the results to a specific address family.

[Tomasz Bursztyka]

---
 gweb/gresolv.c |   26 ++++++++++++++++++++++++++
 gweb/gresolv.h |    2 ++
 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/gweb/gresolv.c b/gweb/gresolv.c
index a334d84..42a3757 100644
--- a/gweb/gresolv.c
+++ b/gweb/gresolv.c
@@ -62,6 +62,8 @@ struct resolv_lookup {
        GResolv *resolv;
        guint id;
 
+       int result_af;
+
        int nr_results;
        struct sort_result *results;
 
@@ -99,6 +101,8 @@ struct resolv_nameserver {
 struct _GResolv {
        gint ref_count;
 
+       int result_af;
+
        guint next_lookup_id;
        GQueue *lookup_queue;
        GQueue *query_queue;
@@ -463,11 +467,17 @@ static void sort_and_return_results(struct resolv_lookup 
*lookup)
 
        for (i = 0; i < lookup->nr_results; i++) {
                if (lookup->results[i].dst.sa.sa_family == AF_INET) {
+                       if (lookup->result_af == AF_INET6)
+                               continue;
+
                        if (inet_ntop(AF_INET,
                                        &lookup->results[i].dst.sin.sin_addr,
                                        buf, sizeof(buf)) == NULL)
                                continue;
                } else if (lookup->results[i].dst.sa.sa_family == AF_INET6) {
+                       if (lookup->result_af == AF_INET)
+                               continue;
+
                        if (inet_ntop(AF_INET6,
                                        &lookup->results[i].dst.sin6.sin6_addr,
                                        buf, sizeof(buf)) == NULL)
@@ -791,6 +801,8 @@ GResolv *g_resolv_new(int index)
 
        resolv->ref_count = 1;
 
+       resolv->result_af = AF_UNSPEC;
+
        resolv->next_lookup_id = 1;
 
        resolv->query_queue = g_queue_new();
@@ -973,6 +985,7 @@ guint g_resolv_lookup_hostname(GResolv *resolv, const char 
*hostname,
        lookup->result_func = func;
        lookup->result_data = user_data;
        lookup->id = resolv->next_lookup_id++;
+       lookup->result_af = resolv->result_af;
 
        if (add_query(lookup, hostname, ns_t_a)) {
                g_free(lookup);
@@ -1005,3 +1018,16 @@ gboolean g_resolv_cancel_lookup(GResolv *resolv, guint 
id)
 
        return TRUE;
 }
+
+gboolean g_resolv_set_address_family(GResolv *resolv, int family)
+{
+       if (resolv == NULL)
+               return FALSE;
+
+       if (family != AF_UNSPEC && family != AF_INET && family != AF_INET6)
+               return FALSE;
+
+       resolv->result_af = family;
+
+       return TRUE;
+}
diff --git a/gweb/gresolv.h b/gweb/gresolv.h
index 1bcaf44..fa6a55e 100644
--- a/gweb/gresolv.h
+++ b/gweb/gresolv.h
@@ -67,6 +67,8 @@ guint g_resolv_lookup_hostname(GResolv *resolv, const char 
*hostname,
 
 gboolean g_resolv_cancel_lookup(GResolv *resolv, guint id);
 
+gboolean g_resolv_set_address_family(GResolv *resolv, int family);
+
 #ifdef __cplusplus
 }
 #endif
-- 
1.7.3.4

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