first draft

sendhcmp.c

@@ -0,0 +1,49 @@
+/* 
+ * $smu-mark$ 
+ * $name: sendhcmp.c$ 
+ * $author: Salvatore Sanfilippo <antirez@invece.org>$ 
+ * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$ 
+ * $license: This software is under GPL version 2 of license$ 
+ * $date: Fri Nov  5 11:55:49 MET 1999$ 
+ * $rev: 4$ 
+ */ 
+
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
+#include <signal.h> /* SIGALARM macro */
+
+#include "hping2.h"
+#include "globals.h"
+
+#define MUST_BE_UNREACHED 0
+
+void    send_hcmp(__u8 type, __u32 arg)
+{
+	static struct hcmphdr hcmph; /* static because we export this */
+				     /* to data_handler() */
+
+	data_size = signlen + sizeof(struct hcmphdr);
+
+	/* build hcmp header */
+	memset(&hcmph, 0, sizeof(hcmph));
+	hcmph.type = type;
+	switch (type)
+	{
+	case HCMP_RESTART:
+		hcmph.typedep.seqnum = htons((__u16) arg);
+		break;
+	case HCMP_SOURCE_QUENCH:
+	case HCMP_SOURCE_STIRUP:
+		hcmph.typedep.usec = htonl(arg);
+		break;
+	default:
+		assert(MUST_BE_UNREACHED);
+	}
+
+	/* use hcmphdr_p to transmit hcmph to data_handler() */
+	hcmphdr_p = &hcmph;
+	kill(getpid(), SIGALRM); /* send hcmp */
+
+	return;
+}