1 files changed, 145 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-syslog.c b/contrib/tcpdump/print-syslog.c
new file mode 100644
index 0000000..5e3cd4f
--- /dev/null
+++ b/contrib/tcpdump/print-syslog.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 1998-2004  Hannes Gredler <hannes@tcpdump.org>
+ *      The TCPDUMP project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
+ * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ */
+
+#define NETDISSECT_REWORKED
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include "interface.h"
+#include "extract.h"
+
+static const char tstr[] = "[|syslog]";
+
+/*
+ * tokenlists and #defines taken from Ethereal - Network traffic analyzer
+ * by Gerald Combs <gerald@ethereal.com>
+ */
+
+#define SYSLOG_SEVERITY_MASK 0x0007  /* 0000 0000 0000 0111 */
+#define SYSLOG_FACILITY_MASK 0x03f8  /* 0000 0011 1111 1000 */
+#define SYSLOG_MAX_DIGITS 3 /* The maximum number if priority digits to read in. */
+
+static const struct tok syslog_severity_values[] = {
+  { 0,      "emergency" },
+  { 1,      "alert" },
+  { 2,      "critical" },
+  { 3,      "error" },
+  { 4,      "warning" },
+  { 5,      "notice" },
+  { 6,      "info" },
+  { 7,      "debug" },
+  { 0, NULL },
+};
+
+static const struct tok syslog_facility_values[] = {
+  { 0,     "kernel" },
+  { 1,     "user" },
+  { 2,     "mail" },
+  { 3,     "daemon" },
+  { 4,     "auth" },
+  { 5,     "syslog" },
+  { 6,     "lpr" },
+  { 7,     "news" },
+  { 8,     "uucp" },
+  { 9,     "cron" },
+  { 10,    "authpriv" },
+  { 11,    "ftp" },
+  { 12,    "ntp" },
+  { 13,    "security" },
+  { 14,    "console" },
+  { 15,    "cron" },
+  { 16,    "local0" },
+  { 17,    "local1" },
+  { 18,    "local2" },
+  { 19,    "local3" },
+  { 20,    "local4" },
+  { 21,    "local5" },
+  { 22,    "local6" },
+  { 23,    "local7" },
+  { 0, NULL },
+};
+
+void
+syslog_print(netdissect_options *ndo,
+             register const u_char *pptr, register u_int len)
+{
+    uint16_t msg_off = 0;
+    uint16_t pri = 0;
+    uint16_t facility,severity;
+
+    /* extract decimal figures that are
+     * encapsulated within < > tags
+     * based on this decimal figure extract the
+     * severity and facility values
+     */
+
+    ND_TCHECK2(*pptr, 1);
+    if (*(pptr+msg_off) == '<') {
+        msg_off++;
+        ND_TCHECK2(*(pptr + msg_off), 1);
+        while ( *(pptr+msg_off) >= '0' &&
+                *(pptr+msg_off) <= '9' &&
+                msg_off <= SYSLOG_MAX_DIGITS) {
+            pri = pri * 10 + (*(pptr+msg_off) - '0');
+            msg_off++;
+            ND_TCHECK2(*(pptr + msg_off), 1);
+        }
+        if (*(pptr+msg_off) != '>') {
+            ND_PRINT((ndo, "%s", tstr));
+            return;
+        }
+        msg_off++;
+    } else {
+        ND_PRINT((ndo, "%s", tstr));
+        return;
+    }
+
+    facility = (pri & SYSLOG_FACILITY_MASK) >> 3;
+    severity = pri & SYSLOG_SEVERITY_MASK;
+
+    if (ndo->ndo_vflag < 1 )
+    {
+        ND_PRINT((ndo, "SYSLOG %s.%s, length: %u",
+               tok2str(syslog_facility_values, "unknown (%u)", facility),
+               tok2str(syslog_severity_values, "unknown (%u)", severity),
+               len));
+        return;
+    }
+
+    ND_PRINT((ndo, "SYSLOG, length: %u\n\tFacility %s (%u), Severity %s (%u)\n\tMsg: ",
+           len,
+           tok2str(syslog_facility_values, "unknown (%u)", facility),
+           facility,
+           tok2str(syslog_severity_values, "unknown (%u)", severity),
+           severity));
+
+    /* print the syslog text in verbose mode */
+    for (; msg_off < len; msg_off++) {
+        ND_TCHECK2(*(pptr + msg_off), 1);
+        safeputchar(ndo, *(pptr + msg_off));
+    }
+
+    if (ndo->ndo_vflag > 1)
+        print_unknown_data(ndo, pptr, "\n\t", len);
+
+    return;
+
+trunc:
+    ND_PRINT((ndo, "%s", tstr));
+}