feat: Improve function for broker IP assignment

Add extra parameter for RabbitMQ broker IP assignment.
Remove unnecessary macro.

src/remote_common.c

@@ -64,14 +64,15 @@ bool die_on_error(int x, char const *context)
     return true;
 }
 
-bool connect_broker(amqp_connection_state_t *conn)
+bool connect_broker(amqp_connection_state_t *conn, const char *hostName)
 {
     amqp_socket_t *socket = NULL;
+    const char *host = (hostName != NULL) ? hostName : "localhost";
 
     /* Connect to the rabbitmq broker */
     *conn = amqp_new_connection();
     socket = amqp_tcp_socket_new(*conn);
-    if (amqp_socket_open(socket, HOSTNAME, 5672) != AMQP_STATUS_OK) {
+    if (amqp_socket_open(socket, host, 5672) != AMQP_STATUS_OK) {
         ddprintf("%s\n", "The rabbitmq broker is closed");
         goto destroy_connection;
     }

src/remote_common.h

@@ -14,10 +14,9 @@
 #include "amqp.h"
 #include "amqp_tcp_socket.h"
 
-#define HOSTNAME "localhost"
 #define MSG_PREFIX "[dcurl-remote] "
 
-bool connect_broker(amqp_connection_state_t *conn);
+bool connect_broker(amqp_connection_state_t *conn, const char *hostName);
 
 bool declare_queue(amqp_connection_state_t *conn,
                    amqp_channel_t channel,

src/remote_interface.c

@@ -146,7 +146,7 @@ static bool Remote_init(RemoteImplContext *remote_ctx)
     memset(remote_ctx->slots, 0, remote_ctx->num_max_thread * sizeof(bool));
 
     for (int i = 0; i < CONN_MAX; i++) {
-        if (!connect_broker(&remote_ctx->conn[i]))
+        if (!connect_broker(&remote_ctx->conn[i], NULL))
             goto fail_to_init;
     }
     if (!declare_queue(&remote_ctx->conn[0], 1, "incoming_queue"))

src/remote_worker.c

@@ -22,7 +22,7 @@ int main(int argc, char const *const *argv)
 
     dcurl_init();
 
-    if (!connect_broker(&conn))
+    if (!connect_broker(&conn, NULL))
         goto fail;
 
     if (!set_consuming_queue(&conn, 1, "incoming_queue"))