Added packet-smtp.c and modified packet.c to include code that was never

finished ...

The SMTP dissection is a good start, but does not handle the message
body at all ...

On to that next.

svn path=/trunk/; revision=2302

1 files changed, 211 insertions, 0 deletions

diff --git a/packet-smtp.c b/packet-smtp.c
new file mode 100644
index 0000000000..37d710fd8a
--- /dev/null
+++ b/packet-smtp.c
@@ -0,0 +1,211 @@
+/* packet-smtp.c
+ * Routines for BXXP packet disassembly
+ *
+ * $Id: packet-smtp.c,v 1.1 2000/08/19 23:06:51 sharpe Exp $
+ *
+ * Copyright (c) 2000 by Richard Sharpe <rsharpe@ns.aus.com>
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs
+ * Copyright 1999 Gerald Combs
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <time.h>
+#include <glib.h>
+#include <string.h>
+#include "packet.h"
+#include "resolv.h"
+#include "prefs.h"
+
+#define TCP_PORT_SMTP 25
+
+void proto_reg_handoff_smtp(void);
+
+static int proto_smtp = -1;
+
+static int hf_smtp_req = -1;
+static int hf_smtp_rsp = -1;
+
+static int ett_smtp = -1;
+
+static int global_smtp_tcp_port = TCP_PORT_SMTP;
+
+static
+int find_smtp_resp_end(const u_char *pd, int offset)
+{
+  int cntr = 0;
+
+  /* Look for the CRLF ... but keep in mind the END_OF_FRAME */
+
+  while (END_OF_FRAME >= cntr) {
+
+    if (pd[offset + cntr] == 0x0A) { /* Found it */
+
+      if (END_OF_FRAME >= cntr + 1) cntr++;
+
+      return cntr;
+
+    }
+
+    cntr++;
+
+  }
+
+  return cntr;
+
+}
+
+#if 0
+static void
+dissect_smtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+#else
+static void
+dissect_smtp(const u_char *pd, int offset, frame_data *fd,
+	     proto_tree *tree)
+{
+  /*    tvbuff_t *tvb = tvb_create_from_top(offset);*/
+    packet_info *pinfo = &pi;
+#endif
+    void            *frame_data;
+    proto_tree      *smtp_tree, *ti;
+    int             request = 0;
+    const u_char            *cmd = NULL, *data = NULL;
+
+    /* Let's figure out this packet ... First check if we have done it 
+       all before ... */
+
+    frame_data = p_get_proto_data(fd, proto_smtp);  /* FIXME: What about tvb */
+
+    /* SMTP messages have a simple format ... */
+
+    if (!frame_data) {    /* We parse the frame and create the data */
+
+      request = pinfo -> destport == TCP_PORT_SMTP;
+      cmd = pd + offset;   /* FIXME: What about tvb */
+      data = index(cmd, ' ');  /* Find the space */
+      if (data) data++;                /* Skip the space if there */
+
+    }
+    else {
+
+    }
+
+    if (check_col(fd, COL_PROTOCOL))
+      col_add_str(fd, COL_PROTOCOL, "SMTP");
+
+    if (check_col(fd, COL_INFO)) {  /* Add the appropriate type here */
+
+      col_add_fstr(fd, COL_INFO, "%s", format_text(cmd, END_OF_FRAME));
+
+    }
+
+    if (tree) { /* Build the tree info ... */
+
+      ti = proto_tree_add_item(tree, proto_smtp, NullTVB, offset, END_OF_FRAME, FALSE);
+      smtp_tree = proto_item_add_subtree(ti, ett_smtp);
+      proto_tree_add_boolean_hidden(smtp_tree, (request ? hf_smtp_req : hf_smtp_rsp),
+				    NullTVB, offset, 4, TRUE);
+
+      if (request) {
+	proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset, 4, "Command: %s", format_text(cmd, 4));
+	proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset + 5, END_OF_FRAME, "Parameter: %s", format_text(cmd + 5, END_OF_FRAME - 5));
+
+      }
+      else {
+
+	/* Must consider a multi-line response here ... */
+
+	while (END_OF_FRAME >= 4 && pd[offset + 3] == '-') {
+	  int resp_len = find_smtp_resp_end(pd, offset);
+
+	  proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset, 3, "Response: %s", format_text(pd + offset, 3));
+	  proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset + 4, resp_len, "Parameter: %s", format_text(pd + offset + 4, resp_len - 4));
+
+	  offset += resp_len;
+	}
+
+	proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset, 3, "Response: %s", format_text(pd + offset, 3));
+	proto_tree_add_protocol_format(smtp_tree, proto_smtp, NullTVB, offset + 4, END_OF_FRAME, "Parameter: %s", format_text(pd + offset + 4, END_OF_FRAME - 4));
+
+      }
+    }
+}
+
+/* Register all the bits needed by the filtering engine */
+
+void
+proto_register_smtp(void)
+{
+  static hf_register_info hf[] = {
+    { &hf_smtp_req,
+      { "Request", "smtp.req", FT_BOOLEAN, BASE_NONE, NULL, 0x0, ""}},
+
+    { &hf_smtp_rsp,
+      { "Response", "smtp.rsp", FT_BOOLEAN, BASE_NONE, NULL, 0x0, ""}},
+  };
+  static gint *ett[] = {
+    &ett_smtp
+  };
+  /*module_t *smtp_module = NULL; */  /* Not yet used */
+
+  /* No Configuration options to register? */
+
+  proto_smtp = proto_register_protocol("Simple Message Transfer Protocol", "smtp");
+
+  proto_register_field_array(proto_smtp, hf, array_length(hf));
+  proto_register_subtree_array(ett, array_length(ett));
+
+}
+
+/* The registration hand-off routine */
+void
+proto_reg_handoff_smtp(void)
+{
+  static int smtp_prefs_initialized = FALSE;
+  static int tcp_port = 0;
+
+  if (smtp_prefs_initialized) {
+
+    dissector_delete("tcp.port", tcp_port, dissect_smtp);
+
+  }
+  else {
+
+    smtp_prefs_initialized = TRUE;
+
+  }
+
+  tcp_port = global_smtp_tcp_port;
+
+  dissector_add("tcp.port", global_smtp_tcp_port, dissect_smtp);
+
+}