1 files changed, 11 insertions, 3 deletions
diff --git a/shard/lib/net/group.ex b/shard/lib/net/group.ex
index 7086c2d..3cce22a 100644
--- a/shard/lib/net/group.ex
+++ b/shard/lib/net/group.ex
@@ -21,7 +21,7 @@ defprotocol SNet.Group do
   Broadcast a message to peers of the group.
   Will send to at most nmax peers, so this is a good primitive for gossip.
   """
-  def broadcast(group, msg, nmax \\ 10)
+  def broadcast(group, msg, opts \\ [])
 
   @doc"""
   Check if a peer is allowed to participate in this group.
@@ -58,9 +58,13 @@ defmodule SNet.PubShardGroup do
       |> Enum.map(fn [{pid, _auth}|_] -> pid end)
     end
 
-    def broadcast(group, msg, nmax) do
+    def broadcast(group, msg, opts) do
+      nmax = opts[:nmax] || 10
+      exclude_pid = opts[:exclude_pid] || []
+
       %SNet.PubShardGroup{id: id} = group
       nsent = get_connections(group)
+      |> Enum.filter(&(&1 not in exclude_pid))
       |> Enum.shuffle
       |> Enum.take(nmax)
       |> Enum.map(&(GenServer.cast(&1, {:send_msg, msg})))
@@ -116,9 +120,13 @@ defmodule SNet.PrivGroup do
       do: pid
     end
 
-    def broadcast(group, msg, nmax) do
+    def broadcast(group, msg, opts) do
+      nmax = opts[:nmax] || 10
+      exclude_pid = opts[:exclude_pid] || []
+
       %SNet.PrivGroup{pk_list: pk_list} = group
       nsent = get_connections(group)
+      |> Enum.filter(&(&1 not in exclude_pid))
       |> Enum.shuffle
       |> Enum.take(nmax)
       |> Enum.map(&(GenServer.cast(&1, {:send_msg, msg})))