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-rw-r--r--lib/icmp.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/icmp.c b/lib/icmp.c
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+++ 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;
+}