Reads Cisco 1048 elements

FossilOrigin-Name: 862bfe7c8db943b9aada1de60f3c537ffe7fd0fc0f943d952c6a912ff9f53cdd

src/cw/cw_read_from.c

@@ -0,0 +1,29 @@
+#include "cw.h"
+#include "log.h"
+
+
+int cw_read_from(struct conn *conn, struct sockaddr_storage * from)
+{
+	int n;
+	uint8_t buf[2024];
+	int len = 2024;
+	
+	if (!conn->readfrom) {
+		cw_log(LOG_ERR, "Fatal error, no readfrom method available.");
+		errno = EPROTO;
+		return -1;
+	}
+
+
+
+	
+	n = conn->readfrom(conn, buf, len, from);
+	if (n < 0)
+		return n;
+
+	if (n > 0) {
+		return conn->process_packet(conn, buf, n, (struct sockaddr *) from);
+	}
+	errno = EAGAIN;
+	return -1;
+}