From 0d32c5c070f817229110f92d7b31df9a3e4eeec5 Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Date: Sun, 24 Oct 2010 21:42:48 +0200
Subject: Fixes, cleanups, comments

- More comments added to the code
- ICMP and ICMPv6 support added to the hash:ip,port, hash:ip,port,ip
  and hash:ip,port,net types
- hash:net and hash:ip,port,net types are reworked
- hash:net,port type added
- Wrong direction parameters fixed in hash:ip,port
- Helps and manpage are updated
- More tests added
- Ugly macros are rewritten to functions in parse.c
  (Holger Eitzenberger)
- resize related bug in hash types fixed (Holger Eitzenberger)
- autoreconf patches by Jan Engelhardt applied
- netlink patch minimalized: dumping can be initialized by a second
  parsing of the message (thanks to David and Patrick for the suggestion)
- IPv4/IPv6 address attributes are introduced in order to fix the context
  (suggested by David)
---
 lib/icmp.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 lib/icmp.c

(limited to 'lib/icmp.c')

diff --git a/lib/icmp.c b/lib/icmp.c
new file mode 100644
index 0000000..93276e2
--- /dev/null
+++ b/lib/icmp.c
@@ -0,0 +1,79 @@
+/* Copyright 2007-2010 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
+ *
+ * This program is free software; you can redistribute it and/or modify   
+ * it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation.
+ */
+#include <libipset/utils.h>			/* STRNEQ */
+#include <libipset/icmp.h>			/* prototypes */
+
+struct icmp_names {
+	const char *name;
+	uint8_t type, code;
+};
+
+static const struct icmp_names icmp_typecodes[] = {
+	{ "echo-reply", 0, 0 },
+	{ "pong", 0, 0 },
+	{ "network-unreachable", 3, 0 },
+	{ "host-unreachable", 3, 1 },
+	{ "protocol-unreachable", 3, 2 },
+	{ "port-unreachable", 3, 3 },
+	{ "fragmentation-needed", 3, 4 },
+	{ "source-route-failed", 3, 5 },
+	{ "network-unknown", 3, 6 },
+	{ "host-unknown", 3, 7 },
+	{ "network-prohibited", 3, 9 },
+	{ "host-prohibited", 3, 10 },
+	{ "TOS-network-unreachable", 3, 11 },
+	{ "TOS-host-unreachable", 3, 12 },
+	{ "communication-prohibited", 3, 13 },
+	{ "host-precedence-violation", 3, 14 },
+	{ "precedence-cutoff", 3, 15 },
+	{ "source-quench", 4, 0 },
+	{ "network-redirect", 5, 0 },
+	{ "host-redirect", 5, 1 },
+	{ "TOS-network-redirect", 5, 2 },
+	{ "TOS-host-redirect", 5, 3 },
+	{ "echo-request", 8, 0 },
+	{ "ping", 8, 0 },
+	{ "router-advertisement", 9, 0 },
+	{ "router-solicitation", 10, 0 },
+	{ "ttl-zero-during-transit", 11, 0 },
+	{ "ttl-zero-during-reassembly", 11, 1 },
+	{ "ip-header-bad", 12, 0 },
+	{ "required-option-missing", 12, 1 },
+	{ "timestamp-request", 13, 0 },
+	{ "timestamp-reply", 14, 0 },
+	{ "address-mask-request", 17, 0 },
+	{ "address-mask-reply", 18, 0 },
+};
+
+const char * id_to_icmp(uint8_t id)
+{
+	return id < ARRAY_SIZE(icmp_typecodes) ? icmp_typecodes[id].name : NULL;
+}
+
+const char * icmp_to_name(uint8_t type, uint8_t code)
+{
+	unsigned int i;
+	
+	for (i = 0; i < ARRAY_SIZE(icmp_typecodes); i++)
+		if (icmp_typecodes[i].type == type && icmp_typecodes[i].code == code)
+			return icmp_typecodes[i].name;
+	
+	return NULL;
+}
+
+int name_to_icmp(const char *str, uint16_t *typecode)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(icmp_typecodes); i++)
+		if (STRNEQ(icmp_typecodes[i].name, str, strlen(str))) {
+			*typecode = (icmp_typecodes[i].type << 8) | icmp_typecodes[i].code;
+			return 0;
+		}
+	
+	return -1;
+}
-- 
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