qulogic/pidgin

Implement buddy icon retrieval using DNS Service API.
draft win-mdns
2021-01-07, Elliott Sales de Andrade
29414c681827
Parents f4d6dbbdc4af
Children a7d8e214eaf9
Implement buddy icon retrieval using DNS Service API.
1 files changed, 101 insertions(+), 1 deletions(-)
  • +101 -1
    libpurple/protocols/bonjour/mdns_dnsapi.c
    • --- a/libpurple/protocols/bonjour/mdns_dnsapi.c Tue Jan 05 06:13:59 2021 -0500
    +++ b/libpurple/protocols/bonjour/mdns_dnsapi.c Thu Jan 07 05:38:13 2021 -0500
    @@ -44,7 +44,7 @@
    } DnsAPIRecordData;
    typedef struct {
    - gpointer unused;
    + PMDNS_QUERY_HANDLE null_query;
    } Win32BuddyImplData;
    static void
    @@ -280,6 +280,63 @@
    }
    }
    +static gboolean
    +_mdns_null_query_error(gpointer _data)
    +{
    + DWORD status = GPOINTER_TO_UINT(_data);
    +
    + purple_debug_error("bonjour", "record query - callback error (%ld)",
    + status);
    +
    + return G_SOURCE_REMOVE;
    +}
    +
    +static gboolean
    +_mdns_null_query_parse(gpointer _data)
    +{
    + DnsAPIRecordData *data = _data;
    + PDNS_RECORD pDnsRecord = data->dns_record;
    + BonjourBuddy *bb = (BonjourBuddy *)data->context;
    + Win32BuddyImplData *idata = bb->mdns_impl_data;
    +
    + g_return_val_if_fail(idata != NULL, G_SOURCE_REMOVE);
    +
    + if (pDnsRecord) {
    + /* } else if (flags & kDNSServiceFlagsAdd && rrtype == kDNSServiceType_NULL) { */
    + /* Buddy Icon response */
    +
    + /* bonjour_buddy_got_buddy_icon(bb, rdata, rdlen); */
    +
    + /* We've got what we need; stop listening */
    + DnsStopMulticastQuery(idata->null_query);
    + g_clear_pointer(&idata->null_query, g_free);
    + }
    +
    + return G_SOURCE_REMOVE;
    +}
    +
    +/* This callback occurs in a different thread; so all it does is pass this to
    + * the main context thread, or Purple will break. */
    +static void
    +_mdns_null_query_callback(PVOID pQueryContext, PMDNS_QUERY_HANDLE pQueryHandle,
    + PDNS_QUERY_RESULT pQueryResults)
    +{
    + if (pQueryResults->QueryStatus == ERROR_SUCCESS) {
    + DnsAPIRecordData *data = g_new(DnsAPIRecordData, 1);
    + data->dns_record = pQueryResults->pQueryRecords;
    + data->context = pQueryContext;
    + g_timeout_add_seconds_full(G_PRIORITY_DEFAULT, 0,
    + G_SOURCE_FUNC(_mdns_null_query_parse), data,
    + (GDestroyNotify)_mdns_record_data_free);
    + } else {
    + g_timeout_add_seconds(0, G_SOURCE_FUNC(_mdns_null_query_error),
    + GUINT_TO_POINTER(pQueryResults->QueryStatus));
    + if (pQueryResults->pQueryRecords) {
    + DnsRecordListFree(pQueryResults->pQueryRecords, DnsFreeRecordList);
    + }
    + }
    +}
    +
    /****************************
    * mdns_interface functions *
    ****************************/
    @@ -493,6 +550,11 @@
    g_return_if_fail(idata != NULL);
    + if (idata->null_query != NULL) {
    + DnsStopMulticastQuery(idata->null_query);
    + g_free(idata->null_query);
    + }
    +
    g_clear_pointer(&buddy->mdns_impl_data, g_free);
    }
    @@ -500,8 +562,46 @@
    dnsapi_mdns_retrieve_buddy_icon(BonjourBuddy *buddy)
    {
    Win32BuddyImplData *idata = buddy->mdns_impl_data;
    + gchar *service_name = NULL;
    + MDNS_QUERY_REQUEST query;
    + DNS_STATUS status;
    + GError *error = NULL;
    g_return_if_fail(idata != NULL);
    +
    + /* Cancel any existing query */
    + if (idata->null_query != NULL) {
    + DnsStopMulticastQuery(idata->null_query);
    + g_clear_pointer(&idata->null_query, g_free);
    + }
    +
    + service_name = g_strjoin(".", buddy->name, LINK_LOCAL_DOMAIN_NAME, NULL);
    + query.Version = DNS_QUERY_REQUEST_VERSION1;
    + query.Query = g_utf8_to_utf16(service_name, -1, NULL, NULL, &error);
    + if (error != NULL) {
    + purple_debug_error("bonjour",
    + "Unable to convert service name '%s' to UTF-16: %s",
    + service_name, error->message);
    + g_error_free(error);
    + g_free(service_name);
    + return;
    + }
    + query.QueryType = DNS_TYPE_NULL;
    + query.QueryOptions = DNS_QUERY_STANDARD;
    + query.InterfaceIndex = 0;
    + query.pQueryCallback = _mdns_null_query_callback;
    + query.pQueryContext = buddy;
    + idata->null_query = g_new0(MDNS_QUERY_HANDLE, 1);
    +
    + status = DnsStartMulticastQuery(&query, idata->null_query);
    + if (status != ERROR_SUCCESS) {
    + purple_debug_error("bonjour",
    + "Unable to query buddy icon record for %s (%ld)",
    + buddy->name, status);
    + }
    +
    + g_free((gpointer)query.Query);
    + g_free(service_name);
    }
    gboolean