From 1a247a22f0226e713ff2026d95e9dc4121bd3433 Mon Sep 17 00:00:00 2001
From: spacemeowx2 <spacemeowx2@gmail.com>
Date: Wed, 10 Oct 2018 15:46:24 +0800
Subject: [PATCH] add broadcast

---
 src/lan-client.c |  9 +++++++++
 src/lan-play.h   |  1 +
 src/main.c       | 11 +++++++++++
 3 files changed, 21 insertions(+)

diff --git a/src/lan-client.c b/src/lan-client.c
index cac0081..cbbafe5 100644
--- a/src/lan-client.c
+++ b/src/lan-client.c
@@ -36,6 +36,15 @@ int lan_client_init(struct lan_play *lan_play)
         LLOG(LLOG_ERROR, "uv_udp_init %d", ret);
     }
 
+    if (lan_play->broadcast) {
+        struct sockaddr_in temp;
+        uv_ip4_addr("0.0.0.0", 11451, &temp);
+        ret = uv_udp_bind(client, (struct sockaddr *)&temp, 0);
+        if (ret != 0) {
+            LLOG(LLOG_ERROR, "uv_udp_bind %d", ret);
+        }
+    }
+
     ret = uv_timer_init(loop, timer);
     if (ret != 0) {
         LLOG(LLOG_ERROR, "uv_timer_init %d", ret);
diff --git a/src/lan-play.h b/src/lan-play.h
index 41cd4ef..1b1ffde 100644
--- a/src/lan-play.h
+++ b/src/lan-play.h
@@ -45,6 +45,7 @@ struct lan_play {
     uv_udp_send_t client_send_req;
 
     // lan_client
+    bool broadcast;
     uv_udp_t client;
     uv_timer_t client_keepalive_timer;
     struct sockaddr_in server_addr;
diff --git a/src/main.c b/src/main.c
index 1f4b013..6024c22 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,6 +5,8 @@ struct {
     int help;
     int version;
 
+    bool broadcast;
+
     char *netif;
     char *netif_ipaddr;
     char *netif_netmask;
@@ -161,6 +163,7 @@ int lan_play_init(struct lan_play *lan_play)
 
     lan_play->dev = NULL;
     lan_play->stop = false;
+    lan_play->broadcast = options.broadcast;
 
     init_pcap(lan_play, mac);
 
@@ -202,6 +205,9 @@ int parse_arguments(int argc, char **argv)
     options.help = 0;
     options.version = 0;
 
+    options.broadcast = false;
+
+    options.netif = NULL;
     options.netif_ipaddr = NULL;
     options.netif_netmask = NULL;
 
@@ -251,6 +257,10 @@ int parse_arguments(int argc, char **argv)
             CHECK_PARAM();
             options.netif = argv[i + 1];
             i++;
+        } else if (!strcmp(arg, "--broadcast")) {
+            options.broadcast = true;
+            options.relay_server_addr = "255.255.255.255:11451";
+            i++;
         }
     }
 
@@ -283,6 +293,7 @@ void print_help(const char *name)
         "    %s\n"
         "        [--help]\n"
         "        [--version]\n"
+        "        [--broadcast]\n"
         // "        [--netif-ipaddr <ipaddr>] default: 10.13.37.1\n"
         // "        [--netif-netmask <ipnetmask>] default: 255.255.0.0\n"
         "        [--relay-server-addr <addr>]\n"