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/* packet-pop.c
* Routines for pop packet dissection
* Copyright 1999, Richard Sharpe <rsharpe@ns.aus.com>
*
* $Id: packet-pop.c,v 1.11 1999/11/20 23:03:09 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* Copyright 1998 Gerald Combs
*
* Copied from packet-tftp.c
*
* 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
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <string.h>
#include <glib.h>
#include "packet.h"
static int proto_pop = -1;
static int hf_pop_response = -1;
static int hf_pop_request = -1;
static gint ett_pop = -1;
static gboolean is_continuation(const u_char *data);
void
dissect_pop(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
{
proto_tree *pop_tree, *ti;
gchar rr[50], rd[1500];
int i1 = (u_char *)strchr(pd + offset, ' ') - (pd + offset); /* Where is that space */
int i2;
int max_data = pi.captured_len - offset;
memset(rr, '\0', sizeof(rr));
memset(rd, '\0', sizeof(rd));
if ((i1 > max_data) || (i1 <= 0)) {
i1 = max_data;
strncpy(rr, pd + offset, MIN(max_data - 2, sizeof(rr) - 1));
}
else {
strncpy(rr, pd + offset, MIN(i1, sizeof(rr) - 1));
i2 = ((u_char *)strchr(pd + offset + i1 + 1, '\r') - (pd + offset)) - i1 - 1;
if (i2 > max_data - i1 - 1 || i2 <= 0) {
i2 = ((u_char *)strchr(pd + offset + i1 + 1, '\n') - (pd + offset)) - i1 - 1;
if (i2 > max_data - i1 - 1 || i2 <= 0)
i2 = max_data - i1 - 1;
}
strncpy(rd, pd + offset + i1 + 1, MIN(i2, sizeof(rd) - 1));
}
if (check_col(fd, COL_PROTOCOL))
col_add_str(fd, COL_PROTOCOL, "POP");
if (check_col(fd, COL_INFO)) {
/*
* Do it like HTTP does.
* Put the first line from the buffer into the summary,
* if it's an POP request or reply.
* Otherwise, just call it a continuation.
*/
if (pi.match_port == pi.srcport && is_continuation(pd+offset))
col_add_str(fd, COL_INFO, "Continuation");
else
col_add_fstr(fd, COL_INFO, "%s: %s %s", (pi.match_port == pi.destport)? "Request" : "Response", rr, rd);
}
if (tree) {
ti = proto_tree_add_item(tree, proto_pop, offset, END_OF_FRAME, NULL);
pop_tree = proto_item_add_subtree(ti, ett_pop);
if (pi.match_port == pi.destport) { /* Request */
proto_tree_add_item_hidden(pop_tree, hf_pop_request, offset, i1, TRUE);
proto_tree_add_text(pop_tree, offset, i1, "Request: %s", rr);
if (strlen(rd) != 0)
proto_tree_add_text(pop_tree, offset + i1 + 1, END_OF_FRAME, "Request Arg: %s", rd);
}
else {
proto_tree_add_item_hidden(pop_tree, hf_pop_response, offset, i1, TRUE);
if (is_continuation(pd+offset))
dissect_data(pd, offset, fd, pop_tree);
else {
proto_tree_add_text(pop_tree, offset, i1, "Response: %s", rr);
if (strlen(rd) != 0)
proto_tree_add_text(pop_tree, offset + i1 + 1, END_OF_FRAME, "Response Arg: %s", rd);
}
}
}
}
void
proto_register_pop(void)
{
static hf_register_info hf[] = {
{ &hf_pop_response,
{ "Response", "pop.response",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if POP response" }},
{ &hf_pop_request,
{ "Request", "pop.request",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if POP request" }}
};
static gint *ett[] = {
&ett_pop,
};
proto_pop = proto_register_protocol("Post Office Protocol", "pop");
proto_register_field_array(proto_pop, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
static gboolean is_continuation(const u_char *data)
{
if (strncmp(data, "+OK", strlen("+OK")) == 0)
return FALSE;
if (strncmp(data, "-ERR", strlen("-ERR")) == 0)
return FALSE;
return TRUE;
}
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