Function NgSendMsg

tools/libnetgraph/msg.c:90–109

* Send a message to a node using control socket node "cs". * Returns -1 if error and sets errno appropriately. * If successful, returns the message ID (token) used. */

 * If successful, returns the message ID (token) used.
 */
int
NgSendMsg(int cs, const char *path,
	  int cookie, int cmd, const void *args, size_t arglen)
{
	struct ng_mesg msg;

	/* Prepare message header */
	memset(&msg, 0, sizeof(msg));
	msg.header.version = NG_VERSION;
	msg.header.typecookie = cookie;
	msg.header.token = atomic_fetch_add(&gMsgId, 1) & INT_MAX;
	msg.header.flags = NGF_ORIG;
	msg.header.cmd = cmd;
	snprintf((char *)msg.header.cmdstr, NG_CMDSTRSIZ, "cmd%d", cmd);

	/* Deliver message */
	if (NgDeliverMsg(cs, path, &msg, args, arglen) < 0)
		return (-1);
	return (msg.header.token);
}

/*
 * Send a message given in ASCII format. We first ask the node to translate