3 files changed, 15 insertions, 0 deletions
diff --git a/command.c b/command.c
index 92556de..b966a75 100644
--- a/command.c
+++ b/command.c
@@ -258,6 +258,11 @@ static bool cmd_history(struct conn_data *data,const char *tag,const char **args
 	return closed;
 }
 
+static bool cmd_ping(struct conn_data *data,const char *tag,const char **args){
+	(void)args;
+	return net_send_pong(data->fd,tag);
+}
+
 
 struct cmd_info{
 	const char *cmdname;
@@ -275,6 +280,7 @@ static const struct cmd_info commands[]={
 	{"invite",2,false,cmd_invite},
 	{"send",2,true,cmd_send},
 	{"history",2,false,cmd_history},
+	{"ping",0,false,cmd_ping},
 };
 #define NCOMMANDS (sizeof(commands)/sizeof(commands[0]))
 
diff --git a/net.c b/net.c
index 8e6644c..e5bdb6b 100644
--- a/net.c
+++ b/net.c
@@ -73,3 +73,11 @@ bool net_send_list(int fd,const char *tag,i64 count,const char **list){
 
 	return net_send_raw_text(fd,"\n",1);
 }
+
+bool net_send_pong(int fd,const char *tag){
+	char *buf=NULL;
+	i64 len=asprintf(&buf,"%s pong\n",tag);
+	bool closed=net_send_raw_text(fd,buf,len);
+	free(buf);
+	return closed;
+}
diff --git a/net.h b/net.h
index de78c12..4528e42 100644
--- a/net.h
+++ b/net.h
@@ -8,3 +8,4 @@ bool net_send_ok(int fd,const char *tag);
 bool net_send_error(int fd,const char *tag,const char *msg);
 bool net_send_name(int fd,const char *tag,const char *name);
 bool net_send_list(int fd,const char *tag,i64 count,const char **list);
+bool net_send_pong(int fd,const char *tag);